WATER POLO WATER INJECTION ASSEMBLY AND WATER POLO WATER INJECTION DEVICE

Abstract

The invention provides a water polo water injection assembly and a water polo water injection device. The water polo water injection assembly omits disassembly with an external water pipe or a water injection cylinder, is convenient to use, and is uniformly filled with water polo. The injection tube bundle is short in length, low in processing cost, wide in application range and low in water pressure requirement The water polo water injection device realizes continuous water extraction and pressure injection, thus realizing water polo water injection without the aid of water pipes, convenient use, uniform water polo water filling and simple replacement

Claims

1. A water polo water injection assembly, comprising: The connecting part is provided with a first water inlet channel and can be connected with an external water pipe or an external water injection cylinder; Water injection seat, provided with a number of outlet holes in said water injection seat, in each of which there is provided an injection tube bundle communicating with the outlet holes; A conversion seat, wherein the conversion seat is provided with two opposite clamping grooves; the shape of the water injection seat is adapted to the area of an opening surrounded by the two clamping grooves; and the water injection seat can be just inserted into the two clamping grooves; The opening area enclosed by two card connecting slots has a structure of large inside and small outside; The small end of the opening can be used for injection tube bundle to pass through; The first water inlet channel is connected to the large end of the opening; When the water injection seat is inserted into the two card connecting slots, the water flowing out of the first water inlet channel can flow into the injection tube bundle through the outlet hole.

2. Water balloon filling assembly according to claim 1, wherein said water outlet holes are provided in at least one row, and in said water filling seat there is provided a water dividing chamber which is concave and can cover the water outlet holes, the far side of said water dividing chamber of the far side of the water outlet holes is open, the near side of the water outlet holes is connected to the water outlet holes, and there is provided a snap-in edge on two opposing sides of the water filling seat; the two opposite sides of the water filling seat are provided with a catching edge.

3. The water bulb injection assembly according to claim 2, which is wherein the connection part and the conversion seat are integrally formed, the water outlet is provided with one to five rows, the length of the injection tube bundle is 4 cm-20 cm, and the diameter of the injection tube bundle is 1.5 mm-3 mm.

4. Water balloon filling assembly according to claim 1, wherein said connecting part has a first threaded part.

5. The water polo injection assembly according to claim 1, wherein the first water inlet channel has a funnel-shaped connecting channel which is arranged between the connecting part and two opposite clamping grooves.

6. The water ball water injection component according to claim 5, wherein it further comprises a conversion head, wherein the conversion head has a conversion channel, the upper section of the inner wall of the conversion head is provided with a third threaded portion, and the lower section of the inner wall of the conversion head is provided with a second threaded portion that matches the first threaded portion; When the connecting portion passes through the first threaded portion When the second threaded portion is threaded, the conversion channel is connected to the first inlet channel.

7. The water polo water injection assembly according to claim 1, wherein when there are two to five rows of water outlet holes, two adjacent rows of water outlet holes are staggered, the length of the injection tube bundle is 4 cm-15 cm, and the diameter of the injection tube bundle is 1.5 mm-2.5 mm.

8. The water polo water injection assembly according to claim 2, wherein the water injection seat is basically rectangular.

9. The water polo water injection assembly according to claim 1, wherein the water injection seat is provided with a hand-held part.

10. The water polo injection assembly according to claim 9, wherein the clamping grooves are provided with two or more groups, and each group of clamping grooves is arranged in parallel or in axial array and integrally formed with the connecting part.

11. The water polo water injection assembly according to claim 10, further comprising a water sealing plug, wherein the shape of the water sealing plug is adapted to the area surrounded by the two clamping grooves, and the water sealing plug can be inserted just inside the two snap-in grooves.

12. The water polo injection assembly according to claim 1, wherein a limiting surface is arranged on the same side of the two clamping grooves.

13. The water polo water injection assembly according to claim 9, wherein the thickness of the water injection seat has a wedge-shaped tendency to gradually narrow from the near hand-held part side to the far hand-held part side, and the open big ends of the two clamping grooves have a wedge-shaped tendency to gradually narrow from the far limit surface side to the near limit surface side.

14. The water polo water injection assembly according to claim 1, wherein a balloon is arranged on the injection tube bundle, and when the water injection seat is inserted into the two clamping grooves, the water flowing out from the first water inlet channel is injected into the balloon through the water outlet hole and the injection tube bundle.

15. A water polo water injection device, characterized by comprising a water injection cylinder and a water polo water injection component, wherein the water polo water injection component comprises: The connecting part is provided with a first water inlet channel; Water injection seat, provided with a number of outlet holes in said water injection seat, in each of which there is provided an injection tube bundle communicating with the outlet holes; The conversion seat has two opposite clamping grooves, and the shape of the water injection seat is adapted to the opening area enclosed by the two clamping grooves; The water injection seat can be inserted exactly into the two clamping grooves; The opening area enclosed by two card connecting slots has a structure of large inside and small outside; The small end of the opening can be used for injection tube bundle to pass through; The first inlet channel is connected to the large end of the opening; When the water injection seat is inserted into the two card connecting slots, the water flowing out of the first inlet channel can flow into the injection tube bundle through the outlet hole; The water injection cylinder is provided with a water outlet, and the water outlet is connected with the first water inlet channel of the connecting part through.

16. The water ball water injection device according to claim 15, wherein there is an injection head that can slide up and down inside the water injection cylinder, and the injection head is connected to the injection rod, which protrudes from the outside of the water injection cylinder, A first one-way control valve is provided on the injection head that only allows water to flow from the injection tube on the injection rod side to the injection tube on the far injection rod side; A water outlet is provided on the far injection rod side of the water injection cylinder, which is connected to the water ball injection component through the water outlet; A sealing cover is provided on the far outlet side of the water injection cylinder, which is covered on the water injection cylinder; An inlet is provided on the far outlet side or the sealing cover of the water injection cylinder, and a through-hole is provided on the sealing cover for the injection rod to move up and down, The injection rod passes through the through-hole and is sealed and connected to the sealing cover through a sealing gasket.

17. The water polo water injection device according to claim 16, wherein the water inlet is provided with a second one-way control valve which only allows water to flow from the outside of the water injection cylinder to the inside of the water injection cylinder.

18. The water polo injection device according to claim 17, wherein the second one-way control valve is a check valve or a flexible rubber pad, and when the second one-way control valve is a flexible rubber pad, the flexible rubber pad can cover the water inlet.

19. The water polo injection device according to claim 17, wherein the second one-way control valve is a flexible rubber pad, and the sealing gasket and the second one-way control valve are separately arranged on the sealing cover.

20. The water polo water injection device according to claim 16, wherein the sealing gasket covers the water inlet, a support pad penetrates the injection rod, and the support pad can slide up and down on the injection rod, and is arranged on the sealing gasket.

21. The water polo water injection device according to claim 16, wherein the water inlet is connected with a flexible pipe through a water inlet channel, and a drawing handle is arranged on the injection rod.

22. The water polo injection device according to claim 16, wherein the first one-way control valve comprises a first circulation hole penetrating the injection head and a flexible pad, which is arranged on the far injection rod side and can cover the first circulation hole.

23. The water polo water injection device according to claim 16, wherein, The first one-way control valve comprises a baffle which is matched with the inner wall of the water injection cylinder, the injection head is in clearance fit with the inner wall of the water injection cylinder, the baffle is connected with the injection head and can slide up and down together with the injection head, and on the baffle; The free washer can freely move up and down between the baffle and the injection head, the outer diameter of the free washer is larger than the inner diameter of the water injection cylinder, the inner diameter of the free washer is smaller than that of the injection head, and the baffle is provided with a second circulation switching hole.

24. The water polo injection device according to claim 23, wherein the baffle is connected with the injection head through a connecting rod, and the connecting rod is provided with a third circulation switching hole, and the second circulation switching hole is connected with the third circulation switching hole through.

25. The water polo water injection device according to claim 23, wherein, A plurality of protrusions are arranged on the edge of the injection head, and the protrusions are matched with the inner diameter of the water injection cylinder.

26. The water polo water injection device according to claim 20, wherein, The support pad can cover the sealing pad, and a limiting column is provided on the support pad; The limiting column is inserted on the injection rod and is opposed to the sealing pad; A flow hole is opened on the support pad.

27. The water polo water injection device according to claim 15, wherein the water injection cylinder is integrally formed or detachably connected with the connecting part; When the water injection cylinder is detachably connected with the connecting part, the water injection cylinder is in threaded connection, clamped or interference fit with the connecting head.

Description

BRIEF DESCRIPTION OF DRAWINGS

[0034] The accompanying drawings, which constitute a part of this application, are used to provide a further understanding of the invention, and the illustrative embodiments of the invention and their descriptions are used to explain the invention, and do not constitute undue limitations on the invention. Among them:

[0035] FIG. 1 is a schematic exploded view of an embodiment of the water polo water injection assembly (excluding the balloon and the conversion head);

[0036] FIG. 2 is a schematic diagram of another perspective exploded state of an embodiment of the water polo water injection assembly (excluding the conversion head and omitting the injection tube bundle);

[0037] FIG. 3 is a schematic diagram of the exploded front view structure of an embodiment of the water polo water injection assembly (excluding the conversion head);

[0038] FIG. 4 is a schematic diagram of the assembled state of an embodiment of the water polo water injection assembly (excluding the balloon and the conversion head);

[0039] FIG. 5 is a schematic diagram of the combined state of the main view structure of an embodiment of the present water balloon injection assembly (excluding the conversion head);

[0040] FIG. 6 is a schematic diagram of the combined state of the main view structure of an embodiment of this water balloon injection assembly;

[0041] FIG. 7 is a schematic diagram of the combined state of an embodiment of this water balloon injection assembly (omitting the balloon);

[0042] FIG. 8 is a schematic diagram of the conversion seat (two groups of clamping grooves) in an embodiment of the water polo water injection assembly;

[0043] FIG. 9 is a schematic diagram of an embodiment of the water polo water injection device in an exploded state;

[0044] FIG. 10 is an exploded view of another embodiment of the water polo water injection device;

[0045] FIG. 11 is a schematic diagram of a water injection seat and a connector according to an embodiment;

[0046] FIG. 12 is a schematic diagram of the exploded state of the water polo water injection device (excluding the water injection seat);

[0047] FIG. 13 shows a schematic diagram of the top view structure of a first embodiment of the first one-way control valve;

[0048] FIG. 14 shows a schematic diagram of the main view sectional structure of the first embodiment of the first one-way control valve;

[0049] FIG. 15 is a schematic top view of the second embodiment of the first one-way control valve;

[0050] FIG. 16 shows a schematic diagram of the main view sectional structure (injection head moving state from top to bottom) of the second embodiment of the first one-way control valve.

[0051] FIG. 17 shows a schematic diagram of the main view sectional structure (injection head moving state from bottom to top) of the second embodiment of the first one-way control valve.

[0052] FIG. 18 shows a schematic diagram of the main view sectional structure (injection head moving state from top to bottom) of the third embodiment of the first one-way control valve.

[0053] FIG. 19 is a schematic diagram of the exploded state of the second one-way control valve in an embodiment of the water polo water injection device;

[0054] FIG. 20 is a schematic diagram of the top view structure of the water injection seat.

[0055] Description of reference numerals: 1connecting part; 11First water inlet channel; 12first threaded part; 13Funnel-shaped connecting channel; 14connector; 141second water inlet channel; 2Water injection seat; 21water outlet; 22Injection tube bundle; 23Balloon; 24water diversion cavity; 25clamping edge; 26Handheld part; 261handle; 3conversion seat; 31clamping slot; 311limit surface; 32opening; 4switching head; 41conversion channel; 42second threaded part; 43the third threaded part; 5water sealing plug; 6water injection cylinder; 60water outlet; 61injection head; 611Protrusion; 62injection rod; 621Pull handle; 63First one-way control valve; 631the first circulation hole; 632Flexible pad; 633baffle; 634connecting rod; 635free washer; 636the second circulation switching hole; 637the third flow conversion hole; 64water inlet; 641the third water inlet channel; 642second one-way control valve; 65Sealing cover; 651through hole; 66Gasket; 67Support pad; 671limit column; 672Flow hole.

DETAILED DESCRIPTION

[0056] The present invention will be described in detail with reference to the attached drawings and examples. Various examples are provided by way of explanation of the invention without limiting the invention. In fact, it will be clear to those skilled in the art that modifications and variations can be made in the present invention without departing from its scope or spirit. For example, features shown or described as part of one embodiment may be used in another embodiment to yield yet another embodiment. Therefore, it is desired that the present invention include such modifications and variations as come within the scope of the appended claims and their equivalents.

[0057] In the description of the present invention, the terms longitudinal, transverse, upper, lower, front, rear, left, right, vertical, horizontal, top and bottom indicate the orientation or position relationship based on the attached drawings, and only the orientation or position relationship, and are intended only for the purpose of This is only for the purpose of describing the present invention and does not require that the present invention must be constructed and operated in a particular orientation, and therefore is not to be construed as a limitation of the present invention. The terms connected, connected, and setup as used in the present invention are to be understood in a broad sense, for example, it can be a fixed connection or a detachable connection; it can be a direct connection, or it can be connected through an intermediate part. For example, it can be a fixed connection or a detachable connection; it can be a direct connection or an indirect connection through an intermediate part; it can be a wired electric connection, a radio connection, or a wireless communication signal connection, and a person of ordinary skill in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0058] One or more examples of the invention are shown in the attached drawings. Detailed Description Numeric and alphabetic symbols are used to refer to features in the drawings. Similar or similar symbols in the drawings and description have been used to refer to similar or similar parts of the present invention. As used herein, the terms first, second and third are used interchangeably to distinguish one component from another and are not intended to indicate the position or importance of individual components.

[0059] As shown in FIGS. 1 to 20, according to the embodiment of the invention, a water balloon injection assembly is provided, including a connection part 1 that can be connected with an external water pipe or an external water injection barrel, a water injection seat 2 that is basically rectangular, and a conversion seat 3. The water injection barrel is a prior art, such as a water injection barrel in the form of a syringe principle and an air filled barrel, which will not be described here. The water injection seat 2 is provided with a plurality of water outlets 21, which are preferably arranged in rows, and at least one row, generally not more than five rows, preferably two to four rows. Each water outlet 21 is provided with an injection tube bundle 22 which is connected with the water outlet 21. The injection tube bundle is 4 cm-20 cm long and 1.5 mm-3 mm in diameter. When the water outlet is provided with two or more rows, the adjacent two water outlets are staggered instead of the previous radial radiation, so that the balloons between the adjacent two rows are staggered from front to back and from left to right after being filled with water, which can further reduce the expansion range, In this way, the length of the corresponding injection tube bundle 22 can be reduced and the processing cost of the injection tube bundle can be saved. Therefore, the length of the injection tube bundle 22 is preferably 4 cm-15 cm, and the diameter of the injection tube bundle 22 is 1.5 mm-2.5 mm. A balloon 23 is arranged on the injection tube bundle 22, and the balloon 23 is tied and fixed on the injection tube bundle 22 through a rubber ring. The conversion seat 3 has two opposite clamping slots 31, and the opening 32 area surrounded by the two clamping slots 31 has a structure of large inside and small outside. The shape of the water injection seat 2 is adapted to the opening area surrounded by the two clamping slots 31, so that the water injection seat 2 can be just inserted into the two clamping slots 31. When the water injection seat 2 is inserted into the two clamping slots 31, the small end of the opening 32 can be used for the injection tube bundle 22 to pass through. The connecting part 1 is provided with a first water inlet channel 11, and the connecting part 1 is integrally formed with the conversion seat 3. The first water inlet channel 11 is connected with the big end of the opening 32. The water flowing out of the first water inlet channel 11 is then injected into the inside of the balloon 23 through the water outlet 21 and the injection tube bundle 22 to realize balloon water injection. After the balloon is filled with water, only plug and replace the water injection seat 2, which eliminates the frequent and tedious disassembly of the external water pipe or water injection tube. The installation, disassembly and use are simple and practical. In this embodiment, the water injection seat 2 is basically rectangular. The water distribution chamber 24 on the water injection seat 2 is concave and can cover all the water outlets 21. The far water outlet 21 side of the water distribution chamber 24 is open, and the near water outlet 21 side is connected with the water outlet 21. The two opposite sides of the water injection seat 2 are provided with clamping edges 25, Therefore, the water flowing out of the first water inlet channel 11 needs to be evenly distributed through the water separation chamber 24 before being injected into the corresponding balloon through the respective water outlet 21 to ensure that the balloon is filled evenly.

[0060] When the water injection seat 2 is inserted into the two clamping grooves 31, the area surrounded by the two clamping grooves 31 can cover the water diversion cavity 24, so that the two clamping grooves 31 can naturally close the water diversion cavity 24, and the water injection seat 2 and the two clamping grooves 31 are in transition fit or interference fit, so that water will not overflow from the joint between the water injection seat 2 and the two clamping grooves 31. Furthermore, the sealing surface 311 is arranged on the same side of the two clamping grooves 31, and the big ends of the openings 32 of the two clamping grooves 31 have a wedge-shaped tendency to gradually narrow from the far sealing surface 311 side to the near sealing surface 311 side, so that the water injection seat 2 has a gradual tightening effect when being inserted into the two clamping grooves 31, so that the connection between the water injection seat 2 and the two clamping grooves 31 is more compact, and water is ensured not to overflow from the joint between the water injection seat 2 and the conversion seat 3. One side of the other two opposite sides of the water injection seat 2 is provided with a hand-held part 26, which is convenient for subsequent plugging and unplugging of the water injection seat 2. The hand-held part 26 includes a handle 261. Further, as shown in FIG. 3, the thickness of the water injection seat 2 can be set to have a wedge-shaped trend of gradually narrowing from the side near the hand-held part 26 to the side far from the hand-held part 26, so as to further ensure the tight connection between the water injection seat 2 and the two clamping grooves 31 and ensure that water will not overflow from the connection between the water injection seat 2 and the two clamping grooves 31. The setting of the sealing surface 311 enables the operator to quickly distinguish the insertable direction of the clamping groove 31, and the operation is more convenient.

[0061] In a preferred embodiment, the connecting part 1 has a first threaded part 12. The thread connection between that connecting part 1 and an external water pipe or an external water injection cylinder is realized through the first threaded part 12, so that water can be injected into the balloon through the first water inlet channel 11, the water diversion cavity 24, the water outlet hole 21 and the injection tube bundle 22. Furthermore, the first water inlet channel 11 has a funnel-shaped connecting channel 13, which is arranged between the first threaded part 12 and two opposite clamping grooves 31, so that it is easier to process and shape, and can adapt to the rapid connection with external hoses (or hoses with different sizes, especially thin hoses with diameters smaller than the first threaded part 12), which is more practical and extremely convenient to operate.

[0062] In a preferred embodiment, as shown in FIGS. 6 to 7, the water balloon water injection assembly also includes a conversion head 4, the conversion head 4 has a conversion channel 41, and the lower section of the inner wall of the conversion head 4 is provided with a second threaded section 42 that cooperates with the first threaded section 12, so that when the connection section 1 is threaded through the first threaded section 12 and the second threaded section, the conversion channel 41 is connected with the first water inlet channel 11; the upper section of the inner wall of the conversion head 4 is provided with a third threaded section 43, which is used to connect with an external water injection cylinder or water pipe. The upper part of the inner wall of the conversion head 4 is provided with a third threaded part 43, which is used to connect with the external water injection cylinder or water pipe. In this way, when facing a water pipe with non-standard threads or an external water cylinder with non-standard threads, the third threaded portion 43 of the conversion head 4 is used to realize the connection between the connection section 1 and a water pipe with non-standard threads or an external water cylinder with non-standard threads by setting up the conversion head 4 and threading the conversion head 4 to the first threaded portion 12 of the connection section 1 to further expand the scope of application.

[0063] In a preferred embodiment, as shown in FIG. 8, in order to further increase the number of water balloons to be filled with water at a single time, there are two or more sets of snap-in slots 31, each set of snap-in slots 31 is set side by side or in an axial array and is integrally molded with the connecting part. This can be simultaneously on a plurality of water injection seat 2 on a plurality of groups of balloons for water injection, and further improve the speed of balloon water injection. Further, the water balloon filling assembly also includes a water sealing plug 5, the shape of the water sealing plug 5 is adapted to the area surrounded by the two joint grooves 31, and the water sealing plug 5 can be inserted exactly into the two joint grooves 31. In this way, when the water flow, water pressure is small or need to inject water balloon less, the water sealing plug 5 will be inserted into one group of card joint slot 31 or two groups of card joint slot 31, you can adjust the number of single injection of water balloon as well as by the water outlet 21, the injection tube bundle 22 injected into the balloon of the water pressure, to ensure that the effect of the balloon water filling, the water pressure requirements of low.

[0064] In the above technical scheme, the first threaded part 12 is screwed on an external water pipe or an external water injection cylinder; Or plug the funnel-shaped connecting channel 13 into the external hose. Only by inserting the water injection seat 2 into the two opposite clamping grooves 31, the water diversion cavity 24 can be connected with the first water inlet channel 11, and the opening area surrounded by the two clamping grooves 31 covers the water diversion cavity 24 to realize the sealed connection between the conversion seat 3 and the water injection seat 2, so that water can be injected into the balloon 23 through the first water inlet channel 11, the water outlet hole 21 and the injection tube bundle 22. After the balloon is filled with water, the water injection seat 2 is pulled out of the two clamping grooves 31 by holding the hand-held part 26, and the water polo can be separated from the injection tube bundle by shaking it by hand, which is very convenient to use and even in water filling. The replacement of the water injection seat 2 and the convenient connection with the conversion seat 3 can be realized only by plugging and unplugging the water injection seat 2, and the utility model has strong practicability and extremely convenient operation.

[0065] The invention also discloses a water polo water injection device, which comprises a water injection cylinder 6 and a water polo water injection component, and the water outlet end of the water injection cylinder 6 is connected with the water polo water injection component. The cross section of the cylinder of the water injection cylinder 6 is preferably circular, and an injection head 61 which can slide up and down is arranged in the cylinder of the water injection cylinder 6, and the injection head 61 is connected with an injection rod 62 which protrudes out of the cylinder of the water injection cylinder 6 and is hermetically connected with the cylinder of the water injection cylinder 6 through a gasket 66; A water outlet 60 is arranged on the far side of the injection rod 62 of the water injection cylinder 6, and the water outlet 60 is connected with the water polo water injection assembly. The joint between the water injection cylinder 6 and the water polo water injection assembly can be integrally injection molded or detachably connected; When the water injection cylinder 6 is detachably connected with the water polo water injection assembly, the connection mode can be threaded connection, clamping or interference fit. As shown in FIG. 9, a fourth threaded part 601 is arranged outside the water outlet 60, and the fourth threaded part 601 is matched with the third threaded part 43 of the changeover head 4, so that the water injection cylinder 6 and the water polo water injection assembly are connected through the changeover head 4.

[0066] In a preferred embodiment, as shown in FIG. 10, the water injection cylinder 6 and the conversion seat 3 are set up as a one-piece type, the water outlet 60 of the water injection cylinder 6 is set up with a connector 14, the connector 14 is set up with a second water inlet channel 141, the connector 14 is integrally molded with the conversion seat 3, as shown in FIG. 11, the second water inlet channel 141 is connected with the large end of the opening 32, when the water injection seat 2 is connected to the conversion seat 3 through the snap-in slot 31, the water flowing out of the second water inlet channel 141 is then injected into the balloon 23 through the water distribution chamber 24, the water outlet hole 21, and the injection tube bundle 22, realizing the water injection of the balloon 23.

[0067] The injection head 61 divides the water injection cylinder 6 into two parts, pushes the injection rod 62 to move the injection head 61 from top to bottom, and the lower part of the water injection cylinder 6 is compressed to pressurize the water in the lower part of the water injection cylinder 6, and the water is injected into the balloon 23 through the water outlet 60, the connector 14, the water outlet 21 and the injection tube bundle 22. The injection head 61 is provided with a first one-way control valve 63, and the first one-way control valve 63 only allows water in the water injection cylinder 6 to flow from the cylinder on the injection rod 62 side to the cylinder on the far injection rod 62 side through the first one-way control valve 63.

[0068] A sealing cover 65 is arranged at the far water outlet 60 side of the water injection cylinder 6, and the sealing cover 65 is arranged on the water injection cylinder 6 through threaded connection or interference fit between the sealing cover 65 and the water injection cylinder 6, and a through hole 651 for the injection rod 62 to move up and down is arranged on the sealing cover 65, and the injection rod 62 passes through the through hole 651 and moves up and down in the through hole 651, and a water inlet 64 is arranged at the far water outlet 60 side of the water injection cylinder 6 or on the sealing cover 65. The water inlet 64 is provided with a third water inlet channel 641, which is connected with a container for storing water through a flexible pipe (not shown in the attached figure), and the third water inlet channel 641 can be in a straight line or an L-shape. The water inlet 64 is preferably arranged on the sealing cover 65, which is convenient for loading and subsequent drawing of the injection head 61. The injection rod 62 is hermetically connected with the sealing cover 65 through a gasket 66 to prevent the water in the water injection cylinder 6 from overflowing to the outside. The gasket 66 can also be replaced by a sealing ring to realize the sealed connection between the injection rod 62 and the sealing cover 65, which will not be described in detail here.

[0069] In a preferred embodiment, the water inlet 64 is provided with a second one-way control valve 642 which only allows water to flow from the outside of the water injection cylinder 6 to the inside of the water injection cylinder 6. The second one-way control valve 642 can be a common duckbill check valve or a flexible rubber pad. When the second one-way control valve 642 is a flexible rubber pad, the flexible rubber pad can cover the water inlet 64. At this time, the sealing gasket 66 and the second one-way control valve 642 can be separately arranged on the sealing cover 65, or the size of the sealing gasket 66 can be increased, so that part of the sealing gasket 66 acts as the second one-way control valve 642 to cover the water inlet 64. When the sealing gasket 66 acts as the second one-way control valve 642, a support pad 67 is penetrated on the injection rod 62. The support pad 67 can slide up and down on the injection rod 62 and is arranged below the sealing pad 66. The support pad 67 can cover the sealing pad 66 and is provided with a limit post 671, which penetrates the injection rod 62 and abuts against the sealing pad 66, so that the sealing pad 66 always abuts against the sealing cover 65, the injection rod 62 always keeps sealing with the sealing cover 65, the sealing pad 66 always stays at the water inlet 64 and the support pad 67 and the sealing pad 66 always abut against the sealing pad 66. The support pad 67 is provided with a circulation hole 672, so that when the injection rod 62 is pushed downward, the upper space of the water injection cylinder 6 gradually increases to form a negative pressure, so that the gasket 66 opens the water inlet 64, and external water flows into the water injection cylinder 6 from the water inlet 64 through the circulation hole 672, so that water can be filled into the water injection cylinder 6 while the balloon is filled with water. When the injection rod 62 drives the injection head 61 to move from bottom to top, a negative pressure is formed at the lower part of the water injection cylinder 6, and the water at the upper part of the water injection cylinder 6 flows from the injection rod 62 side to the far injection rod 62 side through the first one-way control valve 63 to fill the lower part of the water injection cylinder 6. At this time, the gasket 66 is pressed against the sealing cover 65 under the water pressure to seal the water inlet 64, so that a closed circulation system is formed inside the water injection cylinder 6 to prevent water from flowing from the inside of the water injection cylinder 6 to the outside of the water injection cylinder 6.

[0070] When the injection rod 62 drives the injection head 61 to move from top to bottom, at this time, the upper space of the water injection cylinder 6 gradually increases to form negative pressure, so that external water flows into the water injection cylinder 6 from the water inlet 64, and water is filled in the water injection cylinder 6 at the same time. When the injection rod 62 drives the injection head 61 to move from bottom to top, a negative pressure is formed in the lower space of the water injection cylinder 6, and the water in the upper space of the water injection cylinder 6 flows from the injection rod 62 side to the far injection rod 62 side through the first one-way control valve 63 to fill the lower space of the water injection cylinder 6, thus realizing continuous water extraction and pressurized injection into the balloon, and further realizing continuous water injection of water polo.

[0071] Specifically, there may be various embodiments of the first one-way control valve 63.

[0072] In one embodiment, as shown in FIGS. 13 to 14, the first one-way control valve 63 includes a first circulation hole 631 penetrating the injection head 61 and a flexible pad 632, which is arranged far from the injection rod 62 and can cover the first circulation hole 631, and the first circulation hole 631 is arranged in an eccentric or annular array on the injection head 61, so that when the injection rod 62 is pushed to move the injection head 61 from top to bottom, the injection head 61 pushes the flexible pad 632. At this time, the flexible pad 632 is attached to the injection head 61 and covers the first circulation hole 631 to prevent the water in the water injection cylinder 6 from flowing from the far injection rod 62 side to the injection rod 62 side. When the injection head 61 moves from bottom to top, the flexible pad 632 is flexibly deformed under the negative pressure of the barrel on the far side of the injection rod 62 and the water pressure of the barrel on the far side of the injection rod 62, so that the flexible pad 632 peels off the injection head 61, so that the water in the water injection barrel 6 flows from the side of the injection rod 62 to the far side of the injection rod 62 through the first one-way control valve 63.

[0073] Alternatively, in one embodiment, as shown in FIGS. 15 to 17, the first one-way control valve 63 includes a baffle 633 adapted to the inner wall of the water injection cylinder 6. The baffle 633 is connected with the injection head 61 through a connecting rod 634 and can slide up and down together with the injection head 61. A free washer 635 is provided between the baffle 633 and the injection head 61, and the free washer 635 can freely move up and down between the baffle 633 and the injection head 61. The outer diameter of the free washer 635 is larger than the inner diameter of the water injection cylinder 6 and the inner diameter of the free washer 635 is smaller than that of the injection head 61. The diameter of the injection head 61 is in clearance fit with the inner wall of the water injection cylinder 6, so that water can enter the area between the free washer 635 and the injection head 61 from the clearance. A plurality of protrusions 611 are arranged at the edge of the injection head 61, which are in coordination with the inner wall of the water injection cylinder 6, so as to increase the gap between the injection head 61 and the inner wall of the water injection cylinder 6 and prevent the injection head 61 from shaking. The baffle plate 633 is provided with a second circulation conversion hole 636, which can be of a hole type or a slit type. As shown in FIG. 18, a third circulation conversion hole 637 can be further provided on the connecting rod 634, and the second circulation conversion hole 636 is connected with the third circulation conversion hole 637, so that when the injection rod 62 is pushed to move the injection head 61 from top to bottom, Friction between the free washer 635 and the inner wall of the water injection cylinder 6 makes the free washer 635 lean against the injection head 61 to seal the gap between the injection head 61 and the inner wall of the water injection cylinder 6, and prevents the water in the water injection cylinder 6 from flowing from the far injection rod 62 side to the injection rod 62 side. When the injection head 61 moves from bottom to top, the friction between the free washer 635 and the inner wall of the water injection cylinder 6 causes the free washer 635 to lean against the baffle plate 633, so that the water on the injection rod 62 side in the water injection cylinder 6 can enter the area between the free washer 635 and the injection head 61 from the above gap and then flow to the far injection rod 62 side through the second circulation switching hole 636 or the third circulation switching hole 637 and then through the second circulation switching hole 636 to realize continuous water extraction and pressurized injection.

[0074] Cylinder 6 and prevent the injection head 61 from shaking. The baffle plate 633 is provided with a second circulation conversion hole 636, which can be of a hole type or a slit type. As shown in FIG. 18, a third circulation conversion hole 637 can be further provided on the connecting rod 634, and the second circulation conversion hole 636 is connected with the third circulation conversion hole 637, so that when the injection rod 62 is pushed to move the injection head 61 from top to bottom, Friction between the free washer 635 and the inner wall of the water injection cylinder 6 makes the free washer 635 lean against the injection head 61 to seal the gap between the injection head 61 and the inner wall of the water injection cylinder 6, and prevents the water in the water injection cylinder 6 from flowing from the far injection rod 62 side to the injection rod 62 side. When the injection head 61 moves from bottom to top, the friction between the free washer 635 and the inner wall of the water injection cylinder 6 causes the free washer 635 to lean against the baffle plate 633, so that the water on the injection rod 62 side in the water injection cylinder 6 can enter the area between the free washer 635 and the injection head 61 from the above gap and then flow to the far injection rod 62 side through the second circulation switching hole 636 or the third circulation switching hole 637 and then through the second circulation switching hole 636 to realize continuous water extraction and pressurized injection.

[0075] In the above technical scheme, only one end of the flexible pipe is inserted into the third water inlet channel 641, and the other end is connected with the container for storing water, and then the water injection seat 2 is inserted into the two clamping grooves 31, and then the pulling handle 621 arranged at the end of the injection rod 62 is repeatedly pulled up and down, so that continuous water extraction and pressurized injection can be realized, and water polo injection can be realized. After the balloon is filled with water, the water injection seat 2 is pulled out of the two clamping grooves 31 by holding the handle 95, and the water polo can be separated from the injection tube bundle 22 by shaking it by hand, so that the use is very convenient and the water polo is filled evenly.

[0076] What has been described above is only the preferred embodiment of the present invention, and it is not used to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the invention should be included in the protection scope of the invention.