MOVABLE VALVE CORE AND ELECTROMAGNETIC VALVE COMPRISING THE SAME

Abstract

The present invention discloses a movable valve core and an electromagnetic valve comprising the same. The movable valve core, comprising a cylindrical core body (1) defining a central axis, a leading head (2) fixed to the core body (1) removably, wherein a water-proof valve membrane (3) sandwiched between the core body (1) and the leading head (2), wherein a mounting hole (4) is axially formed in the core body (1), and a connector (5) for projecting into the mounting hole (4) extends axially from the bottom of the leading head (2), and the connector (5) is fixed into the mounting hole (4). The connector (5) is provided with an outer thread (6), and the leading head (2) is screwed into the mounting hole (4).

Claims

1. A movable valve core, comprising a cylindrical core body (1) defining a central axis, a leading head (2) fixed to the core body (1) removably, and a water-proof valve membrane (3) sandwiched between the core body (1) and the leading head (2), wherein a mounting hole (4) is axially formed in the core body (1), and a connector (5) for projecting into the mounting hole (4) extends axially from the bottom of the leading head (2), and the connector (5) is fixed into the mounting hole (4).

2. The movable valve core of claim 1, wherein the connector (5) is provided with an outer thread (6), and the leading head (2) is screwed into the mounting hole (4).

3. The movable valve core of claim 1, wherein a plurality of cutouts (216) are formed into the connector (5) axially and radially, and wherein the connector (5) is fixed into the mounting hole (4) in an interference fit.

4. The movable valve core of claim 1, wherein the connector (5) is provided with a flexible notch (12) open axially and radially, thereby dividing the connector (5) into a plurality of flexible petals (11).

5. The movable valve core of claim 4, wherein said plurality of flexible petals (11) is formed with a guiding surface (13) tapered axially (5).

6. The movable valve core of claim 5, wherein each flexible petal (11) is rounded.

7. The movable valve core of claim 4, wherein the connector (5) comprises a first shaft section (7) formed axially and integrally with the leading head (2), a second shaft section (8) formed axially and integrally with the first shaft section (7) and a third shaft section (9) formed axially and integrally with the second shaft section (8), and wherein the flexible notch (12) is formed in the third shaft section (9), and the diameters of the third shaft section (9), the second shaft section (8) and the first shaft section (7) are reduced in sequence.

8. The movable valve core of claim 7, wherein the mounting hole (4) is engaged with the third shaft section (9) and the second shaft section (8) of the connector (5) radially and axially.

9. The movable valve core of claim 1, wherein the water-proof valve membrane (3) is disposed around the leading head (2), and wherein the water-proof valve membrane (3) is corrugated co-axially.

10. An electromagnetic valve comprising a valve body (14) and a movable valve core (15) defining a central axis, wherein the valve body (14) comprises a valve seat (26) and a valve cover (27) fixed axially and tightly to the valve seat (26) in a detachable manner, wherein the valve cover (27) defines a first cavity (16) and a second cavity (17), wherein the first cavity (16) is provided therein with an upper opening (18) and a lower opening (19), and the second cavity (17) is located below the first cavity (16) and is open to the lower opening (19) of the first cavity (16); the valve cover (27) is provided with an axial inlet (20) into the first cavity (16), a first outlet (21) from the upper opening (18) and a second outlet (22) from the second cavity (17); the movable valve core (15) is located partially within the first cavity (16) and the second cavity (17); the valve seat (26) is provided therein with a magnetic driving assembly (30) for driving the movable valve core (15) to move up and down, wherein a gasket (23) detachably caps the movable valve core (15) within the first cavity (16), and the gasket (23) has a first position in which the gasket (23) moves upward to seal the upper opening (18) and open the lower opening (19) and a second position in which the gasket (23) moves downward to seal the lower opening (19) and open the upper opening (18).

11. The electromagnetic valve of claim 10, wherein the movable valve core (15) is provided with a holder (24) capped with the gasket (23).

12. The electromagnetic valve of claim 10, wherein the magnetic driving assembly (30) comprises an electromagnetic coil (31), a stationary iron core (32) and a frame (33), and wherein the electromagnetic coil (31) is sleeved around the frame (33), and the frame (33) is provided therein with a third cavity (331); the stationary iron core (32) is disposed within the third cavity (331), and the stationary iron core (32) is connected axially with the movable valve core (15) through a spring (34).

13. The electromagnetic valve of claim 12, wherein the stationary iron core (32) is provided therein with an air vent (38) in communication with the third cavity (331) and the atmosphere.

14. The electromagnetic valve of claim 12, wherein the valve seat (26) is provided therein with a receptacle (37) around the central axis, and wherein the stationary iron core (32) comprises a main body (35) fit into the third cavity (331) and an insertion portion (36) formed integrally with the main body and inserted into the receptacle (37).

15. The electromagnetic valve of claim 10, wherein the valve cover (27) comprises an upper valve cover (271) and a lower valve cover (272), and wherein the upper valve cover (271) is detachably connected to the lower valve cover (272), the inlet (20) and the first outlet (21) are formed with the upper valve cover (271), and the second outlet (22) is formed with the lower valve cover (272) and extended parallel to the first outlet (21).

16. The electromagnetic valve of claim 15, wherein the lower valve cover (272) is provided on the top thereof with an annular groove (28), wherein the annular groove (28) is provided therein with a sealing ring (29).

17. The electromagnetic valve of claim 15, wherein the upper valve cover (271) is screwed with the lower valve cover (272) tightly.

18. The electromagnetic valve of claim 15, wherein the upper valve cover (271) and the lower valve cover (272) are fixed together tightly by means of a bolt.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0007] FIG. 1 schematically shows a cross-sectional structural view of Embodiment 1;

[0008] FIG. 2 schematically shows a cross-sectional structural view of Embodiment 2;

[0009] FIG. 3 schematically shows a structural view of a leading head in Embodiment 2;

[0010] FIG. 4 schematically shows a cross-sectional structural view of Embodiment 3;

[0011] FIG. 5 schematically shows a structural view of a leading head in Embodiment 3;

[0012] FIG. 6 schematically shows a cross-sectional structural view of Embodiment 3;

[0013] FIG. 7 schematically shows a cross-sectional structural view of Embodiment 4;

[0014] FIG. 8 schematically shows an exploded structural view of Embodiment 4; and

[0015] FIG. 9 schematically shows a cross-sectional structural view of Embodiment 5.

NUMERICAL IDENTIFIERS

[0016] 1core body; 2leading head; 3water-proof valve membrane; 4mounting hole; 5connector; 6outer thread; 7first shaft section; 8second shaft section; 9third shaft section; 10annular blocking shoulder; 11flexible petal; 12flexible notch; 13guiding surface; 211first rod section; 212second rod section; 213third rod section; 214first chamfer; 215second chamfer; 216cutout; 14valve body; 15movable valve core; 16first cavity; 17second cavity; 18upper opening; 19lower opening; 20inlet; 21first outlet; 22second outlet; 23gasket; 24holder; 25T-shaped groove; 26valve seat; 27valve cover; 271upper valve cover; 272lower valve cover; 28annular groove; 29sealing ring; 30magnetic driving assembly; 31electromagnetic coil; 32stationary iron core; 33frame; 331third cavity; 34spring; 35main body; 36insertion portion; 37receptacle; 38air vent; 39outer iron sheet; 40inner iron sheet; 41PIN needle; and 42insulator.

DETAILED DESCRIPTION OF THE INVENTION

[0017] The present invention will be described below in further detail in conjunction with the accompanying drawings.

Embodiment 1

[0018] As shown in FIG. 1, a movable valve core comprises a core body 1, a leading head 2 and a water-proof valve membrane 3, wherein the leading head 2 is connected to an upper end of the core body 1, and the water-proof valve membrane 3 is sandwiched between the core body 1 and the leading head 2 so as to improve the sealability between the core body 1 and the leading head 2.

[0019] As shown in FIG. 1, a mounting hole 4 is disposed on one end of the core body 1 that faces towards the leading head 2, and a connector 5 for projecting into the mounting hole 4 extends from the bottom of the leading head 2; an outer wall of the connector 5 is provided with an outer thread 6, and the leading head 2 is threaded into the mounting hole 4. Meanwhile, a glue may be injected between the outer wall of the connector 5 and the inner wall of the mounting hole 4, which prevents the connector 5 from being loosened, thereby resulting in a firm connection between the connector 5 and the mounting hole 4. In this Embodiment, with the threaded connection, the connector 5 can be fixed to the mounting hole 4. Moreover, the structure is simple, and the maintenance is easy.

[0020] In conclusion, as compared with a prior single-piece movable valve core 15, the movable valve core 15 the core body 1 and the leading head 2 are provided separately to manufacture the movable valve core 15 easily. Moreover, this practice may reduce the demands on the overall machining precision and decrease the machining costs. Therefore, this movable valve core is more suitable for a production line.

Embodiment 2

[0021] As shown in FIGS. 2 and 3, a movable valve core is different from Embodiment 1 in that: a leading head 2 comprises a first rod section 211, a second rod section 212 and a third rod section 213 that are connected in series, wherein the diameter of the first rod section 211 is smaller than that of the second rod section 212, and the diameter of the second rod section 212 is smaller than that of the third rod section 213; a first chamfer 214 is disposed between the first rod section 211 and the second rod section 212, and a second chamfer 215 is disposed between the second rod section 212 and the third rod section 213. Therefore, the first rod section 211, the second rod section 212 and the third rod section 213 form a step-shaped leading head such that a liquid can impact on the first chamfer 214 and the second chamfer 215 to achieve a pressure distribution of the liquid.

[0022] As shown in FIGS. 2 and 3, a connector 5 is integrally connected to a lower end of the third rod section 213, a number of cutouts 216 are disposed in the outer wall of the connector in a circumferential direction, and the connector 5 is fixed into a mounting hole 4 in an interference fit. Therefore, the connector 5 is fixed to the mounting hole 4 in an interference fit, which can improve the overall machining efficiency. Moreover, the arrangement of cutouts 216 can facilitate the insertion of the connector 5 into the mounting hole 4, and save the material.

Embodiment 3

[0023] As shown in FIGS. 4 and 5, a movable valve core is different from Embodiment 1 in that: a connector 5 comprises a first shaft section 7 connected with the bottom of a leading head 2, a second shaft section 8 connected with the first shaft section 7 and a third shaft section 9 connected with the second shaft section 8. Specifically, in order to prevent the connector 5 from being disengaged from a mounting hole 4, and to have a firm connection between the connector 5 and the mounting hole 4, the diameters of the third shaft section 9, the second shaft section 8 and the first shaft section 7 are reduced in sequence, such that the connector 5 is a radially step-shaped shaft.

[0024] Further, an annular blocking shoulder 10 is formed between the third shaft section 9 and the second shaft section 8, wherein the annular blocking shoulder 10 can match the mounting hole 4 radially and axially, such that the annular blocking shoulder 10 can hold the stepped portion of the mounting hole 4, thereby improving the stability of the connector 5 as fixed.

[0025] As shown in FIGS. 5 and 6, an end of the third shaft section 9 is provided with a flexible notch 12, which divides the end into a number of flexible petals 11, and with the arrangement of the flexible notch 12, the flexible petals 11 are flexible. Specifically, when the flexible petals 11 are pressed into the mounting hole 4, these flexible petals 11 can be deformed, and when the flexible petals 11 pass through the mounting hole 4 completely, these flexible petals 11 can recover from the deformation. Meanwhile, outer walls of the flexible petals 11 will abut against the inner wall of the mounting hole 4, thereby fixing the connector 5 to the mounting hole 4.

[0026] As shown in FIGS. 5 and 6, an outer wall of each flexible petal 11 is provided with a guiding surface 13 having a lower end tapered towards a central axis of the connector 5, and every side of each flexible petal 11 that faces away from the guiding surface 13 are rounded, which reduces the thickness of one end of each flexible petal 11 that faces towards the mounting hole 4, such that the flexible petal 11 can pass into the mounting hole 4 more readily. Moreover, each flexible petal 11 has a smooth surface, thereby avoiding any accidental injury. Meanwhile, the flexible petals 11 will have a stress-concentration relief.

Embodiment 4

[0027] As shown in FIG. 7, an electromagnetic valve comprises a valve body 14 and a movable valve core 15 disposed in the valve body 14. The movable valve core 15 is made according to Embodiment 1. The valve body 14 is provided therein with a first cavity 16 and a second cavity 17, wherein the first cavity 16 is provided therein with an upper opening 18 and a lower opening 19, and the second cavity 17 is located below the first cavity 16, and is open to the lower opening 19 of the first cavity 16. The valve body 14 is provided with an inlet 20 in communication with the first cavity 16, a first outlet 21 in communication with the upper opening 18 and a second outlet 22 in communication with the second cavity 17. A gasket 23 is detachably connected to the top of the movable valve core 15 within the first cavity 16, and the gasket 23 has a first position in which the gasket 23 moves upward to seal the upper opening 18 and open the lower opening 19 and a second position in which the gasket 23 moves downward to seal the lower opening 19 and open the upper opening 18.

[0028] As shown in FIG. 7, the top of the movable valve core 15 is provided with a holder 24 that extends horizontally outward, and the bottom of the gasket 23 is provided with a T-shaped groove 25 for clamping holder 24 therein. Under the cooperation of the holder 24 with the T-shaped groove 25, the gasket 23 and the movable valve core 15 can be connected together in a removable manner for a reduced machining cost and an easy mounting.

[0029] It should be noted that the width of one side of the gasket 23 that abuts against the upper opening 18 or the lower opening 19 is larger than the width of the upper opening 18 and the lower opening 19. In other words, the gasket 23 can completely seal the upper opening 18 or the lower opening 19, thereby effectively avoiding a leakage of the medium.

[0030] As shown in FIGS. 7 and 8, the valve body 14 comprises a valve seat 26 and a valve cover 27, wherein the valve cover 27 is mounted to the upper end of the valve seat 26. Specifically, the valve cover 27 comprises an upper valve cover 271 and a lower valve cover 272, wherein the upper valve cover 271 is screwed with the lower valve cover 272 tightly, the inlet 20 and the first outlet 21 are respectively disposed on two sides of the upper valve cover 271, the second outlet 22 is disposed on the lower valve cover 272, and the second outlet 22 and the first outlet 21 are disposed on the same side, which facilitates the connection of pipelines in the same direction, thereby effectively avoiding the situation in which pipes could be bent.

[0031] Further, an upper end face of the lower valve cover 272 is provided with an annular groove 28, and the annular groove 28 is provided therein with a sealing ring 29. The arrangement of the sealing ring 29 can improve the sealability between the upper valve cover 271 and the lower valve cover 272 so as to prevent the medium from leaking out of the valve body 14, thereby reducing a loss of the medium.

[0032] As shown in FIG. 7, the valve seat 26 receives a magnetic driving assembly 30 for driving the movable valve core 15 to move up and down. Specifically, the magnetic driving assembly 30 comprises an electromagnetic coil 31, a stationary iron core 32 and a frame 33, wherein the frame 33 has a substantially I-shaped cross-section. The electromagnetic coil 31 is sleeved around the frame 33, and the frame 33 defines a third cavity 331, wherein the stationary iron core 32 is disposed within the third cavity 331, and an upper end of the stationary iron core 32 is connected to a lower end of the movable valve core 15 through a spring 34. Therefore, when the electromagnetic coil 31 is de-energized, the movable valve core 15, when driven by the spring 34, slides towards one side of the valve cover 27, such that the upper opening 18 is sealed, and the lower opening 19 is opened; on the other hand, when the electromagnetic coil 31 is energized to generate a magnetic force and force the movable valve core 15 to come against the spring 34, and slides towards one side of the stationary iron core 32, such that the lower opening 19 is sealed, and the upper opening 18 is opened, thereby changing the flow direction of the medium. In addition, the water-proof membrane 3 seals the third cavity 331 against the second cavity 17, thereby preventing the metal members within the third cavity 331 from water and oxidization.

[0033] As shown in FIG. 8, the stationary iron core 32 comprises a main body 35 and an insertion portion 36 integrally formed with the main body 35 and extending away from the spring 34, wherein the outer diameter of the insertion portion 36 is smaller than that of the main body 35. A receptacle 37 is disposed respectively through the bottom wall of the valve seat 26 and an outer iron sheet 40 is passed through by the insertion portion 36, wherein the stationary iron core 32 is connected with the valve seat 26 by inserting the insertion portion 36 into the receptacle 37 so as to keep the stationary iron core 32 stable.

[0034] Further, the stationary iron core 32 is provided therein with an air vent 38 in communication with the third cavity 331 and the atmosphere. With the arrangement of the air vent 38, heat generated within the third cavity 331 can be discharged therefrom, thereby effectively controlling the temperature increase in the third cavity 331, and ensuring the normal operation of the electromagnetic valve.

[0035] As shown in FIG. 8, the top and the bottom of the frame 33 are provided respectively with an inner iron sheet 39 and an outer iron sheet 40 within the valve seat 26, and an end of the frame 33 adjacent to the inner iron sheet 40 is fixed with a pair of diametrically opposite PIN needles 41 for electrical connection with the electromagnetic coil 31. Moreover, the inner iron sheet 40 and the outer iron sheet 39 axially oppositely cap the electromagnetic coil 31 and guide a magnetic field, and when the electromagnetic coil 31 is energized, the leakage of magnetic flux will be reduced.

[0036] Further, in order to avoid the situation in which the PIN needles 41 could contact the inner iron sheet 40 while projecting outward from the valve seat 26, the diametrically opposite sides of the inner iron sheet 40 are provided with a pair of grooves through which the PIN needles 41 pass clearly, and insulators 42 for insulating the PIN needles 41 from the inner iron sheet 40 extend axially from said end of the frame 33 adjacent to the inner iron sheet 40.

[0037] The invention operates in a manner as follows: when the movable valve core 15 moves upward, the upper opening 18 is sealed, and the lower opening 19 is opened; the medium enters through the inlet 20, and exits through the second outlet 22; on the other hand, when the movable valve core 15 moves downward, the lower opening 19 is sealed, and the upper opening 18 is opened; at this time, a medium enters through the inlet 20, and exits through the first outlet 21. Therefore, upon the action of the magnetic driving assembly 30, the gasket 23 can block any one of the first outlet 21 or the second outlet 22 according to the movement of the movable valve core 15, thereby changing the flow direction of the medium.

Embodiment 5

[0038] As shown in FIG. 9, an electromagnetic valve is different from Embodiment 4 in a movable valve core 15 of Embodiment 2.

[0039] In addition, the upper valve cover 271 and the lower valve cover 272 are fastened together tightly through a bolt in a removable manner; more importantly, this structure is simple, and the maintenance is easy.

[0040] What have been described above are merely preferred embodiments of the present invention, and not intended to limit the present invention. All the modifications, equivalents, improvements and the like that are made without departing from the concept of the present invention shall be covered by the scope of protection of the present invention.