Liquid container

Abstract

A liquid container comprises an outer casing, a flexible inner bag disposed in the outer casing, and a liquid outlet valve. The inner bag is fixedly connected to the valve and a bag opening of the inner bag forms a seal with the liquid outlet valve. The outer casing forms a seal with the valve and one end of the outer casing connected to the valve is further connected with a ventilation structure. A flexible separation bag is further sleevely disposed between the inner bag and the outer casing, and has a plurality of convex portions protruding from a surface of the separation bag, and each of the convex portions extends from a bag opening of the separation bag toward a direction away from the bag opening of the separation bag. A first auxiliary air passage is formed between the two adjacent convex portions.

Claims

1. A container for fluids, comprising: an outer casing; a flexible gas tight or liquid tight inner bag disposed in the outer casing, the inner bag capable of storing fluids; a valve fixedly connected to the inner bag, the valve capable of controlling fluids to flow in or out of the inner bag, the valve connected to the outer casing to form a seal with the outer casing; a ventilation structure arranged in the valve or on the outer casing, the ventilation structure capable of controlling gas to flow in or out of a space between the inner bag and the outer casing; a flexible separation bag capable of venting gas sleevely disposed on an outer surface of the inner bag, the separation bag disposed between the inner bag and the outer casing; a plurality of convex portions protruding from a surface of the separation bag, each of the convex portions extending in a direction from a top of the separation bag toward a bottom of the separation bag; and first auxiliary air passages are formed between two adjacent convex portions, the first auxiliary air passages capable of allowing gas circulation, and the first auxiliary air passages are always in communication with the ventilation structure; wherein the separation bag is provided with openings capable of venting gas.

2. The liquid container as claimed in claim 1, wherein the convex portions are located on an outer surface of the separation bag, a first end of the ventilation structure is in communication with outside air, and a second end of the ventilation structure is connected with an inner cavity of the outer casing.

3. The liquid container as claimed in claim 2, wherein each of the convex portions comprises a plurality of protrusions arranged in a straight line, second auxiliary air passages are formed between two adjacent protrusions, the second auxiliary air passages capable of communicating with the adjacent first auxiliary air passages, and the first auxiliary air passages and the second auxiliary air passages are crisscrossedly disposed.

4. The liquid container as claimed in claim 3, wherein the protrusions are rhombic, triangular, or circular, and all the protrusions are evenly arranged.

5. The liquid container as claimed in claim 2, wherein the convex portions comprise elongated convex strips, and at least one of the convex strips extends from the top of the separation bag to the bottom of the separation bag.

6. The liquid container as claimed in claim 5, wherein an outer surface of at least one of the convex strips is in an arc shape and a radius of the arc is smaller than a radius of the outer casing, and a smooth transition is between the convex strips and the outer surface of the separation bag.

7. The liquid container as claimed in claim 5, wherein the convex strips are pleated and formed by self-clinging of an inner surface of the separation bag.

8. The liquid container as claimed in claim 1, wherein volumes of the separation bag and the inner bag in an unrestricted state are larger than a volume of the outer casing.

9. The liquid container as claimed in claim 1, wherein the convex portions are located on an inner surface of the separation bag, a first end of the ventilation structure is in communication with outside air, and a second end of the ventilation structure is communicated with an inner cavity of the outer casing, at least one of the convex portions extends from the top of the separation bag to the bottom of the separation bag, and the bottom of the separation bag is further disposed with openings extending at least to the convex portions.

10. The liquid container as claimed in claim 2, wherein the bag opening of the separation bag and the valve are fixedly connected to each other and form a seal, and the ventilation structure comprises a first venting passage located on the liquid outlet valve.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) FIG. 1 is a partial cross-sectional view of a liquid container in a first embodiment;

(2) FIG. 2 is a cross-sectional view of the liquid container in the first embodiment with a separation bag in a semi-stretched state;

(3) FIG. 3 is an enlarged view of a portion A of FIG. 2;

(4) FIG. 4 is a schematic view of the separation bag in the first embodiment;

(5) FIG. 5 is a schematic view of the separation bag in a second embodiment;

(6) FIG. 6 is a schematic view of the separation bag in a third embodiment;

(7) FIG. 7 is a cross-sectional view of the separation bag in the third embodiment;

(8) FIG. 8 is an enlarged view of a portion B of FIG. 7;

(9) FIG. 9 is a schematic view of the separation bag in a fifth embodiment;

(10) FIG. 10 is a schematic view of the separation bag in a sixth embodiment; and

(11) FIG. 11 is a cross-sectional view of a liquid container with a gas valve in the seventh embodiment.

DETAILED DESCRIPTION OF THE INVENTION

(12) The technical solutions of the present invention are further described below with reference to the specific embodiments of the present invention in conjunction with the accompanied drawings, but the present invention is not limited to these embodiments.

Embodiment 1

(13) As shown in FIG. 1 to FIG. 2, one embodiment of a liquid container comprises a barrel-shaped outer casing 1, a flexible gas or liquid tight inner bag 2 disposed in the outer casing 1 for storing fluids, and a valve 3 for controlling the fluid to flow in/out of the inner bag 2. The inner bag 2 is fixedly connected to the valve 3 and a bag opening 21 of the inner bag 2 forms a seal with the valve 3. The outer casing 1 forms a seal with the valve 3, and one end of the outer casing 1 connected to the valve 3 is further connected with a ventilation structure 4 capable of controlling gas to flow in/out of a space between the inner bag 2 and the outer casing 1. The ventilation structure 4 comprises a first venting passage located on the valve 3. The first venting passage 41 can be directly provided on the valve 3, so that the various liquid discharge structures and the ventilation structure 4 are more compact.

(14) As shown in FIG. 3 and FIG. 4, one embodiment of a separation bag 5 is further sleevely disposed between the inner bag 2 and the outer casing 1. A bag opening of the separation bag 5 and the valve 3 are fixedly connected to each other and form a seal. Of course, the separation bag 5 also need not be fixedly connected to the valve 3. The separation bag 5 is a flexible bag, preferably a plastic film bag. The separation bag 5 has a plurality of convex portions 51 protruding from a surface of the separation bag 5, and each of the convex portions 51 extends in a direction from a top 55 of the separation bag 5 toward bottom 56 of the separation bag 5. A first auxiliary air passage 52 for gas circulation is formed between the two adjacent convex portions 51, and the first auxiliary air passages 52 are always in communication with the ventilation structure 4.

(15) By separately disposing one embodiment of the flexible separation bag 5 between the outer casing 1 and the inner bag 2, the convex portions 51 can be conveniently processed without affecting the structure and strength of the inner bag 2 itself. In the process of filling the liquid into the inner bag 2, the separation bag 5 is gradually expanded by the inner bag 2 to fit on an inner surface of the outer casing 1. The convex portions 51 are disposed on the separation bag 5 to ensure that the first auxiliary air passages 52 formed between the convex portions 51 can communicate with the ventilation structure 4, and, even if the separation bag 5 is stretched to fit on the inner surface of the outer casing 1, the ventilation structure 4 is not further blocked. A portion of the gas located in the outer casing 1 can still flow to the ventilation structure 4 along the first auxiliary air passages 52 and be discharged outside the liquid container, so as to ensure that the liquid is not compressed by the high pressure gas and can be further filled into the inner bag 2, thereby avoiding waste of space to a certain extent, and increasing the filling volume of the liquid container during filling. Furthermore, the volumes of the separation bag 5 and the inner bag 2 in an unrestricted state are respectively larger than the volume of the outer casing 1. This structure can ensure that the separation bag 5 and the inner bag 2 can be fitted with each position on the inner surface of the outer casing 1, that is, all the space inside the outer casing 1 can be further utilized to avoid wasting the space of the outer casing 1, so as to increase the filling volume of the liquid container during filling. In this embodiment, it is preferable to have the inner surface of the separation bag 5 and the outer surface of the inner bag 2 fitted with each other, or to form a vacuum between the separation bag 5 and the inner bag 2, so as to avoid the air between the two to take up a certain amount of filling space.

(16) As shown in FIG. 4, the convex portions 51 of one embodiment of the present invention are located on the outer surface of the separation bag 5, one end of the ventilation structure 4 is in communication with the outside air, and the other end is communicated with an inner cavity of the outer casing 1. The convex portions 51 can be disposed on the outer surface of the separation bag 5, such that the ventilation structure 4 is communicated to the cavity between the outer casing 1 and the separation bag 5, and this structure can ensure that the gas in the outer casing 1 can be smoothly discharged to the outside along the first auxiliary air passages 52 between two adjacent convex portions 51 in order to increase the filling volume of the liquid container during filling. Specifically, each of the convex portions 51 comprises a plurality of protrusions 511 arranged in a straight line, a second auxiliary air passage 512 is formed between the two adjacent protrusions 511, the second auxiliary air passage 512 can communicate with the adjacent first auxiliary air passages 52, and the first auxiliary air passages 52 and the second auxiliary air passages 512 are crisscross disposed. After the first auxiliary air passages 52 and the second auxiliary air passages 512 are crisscross disposed, an exhaust network is formed on the outer surface of the separation bag 5. When a certain local position is subjected to a higher air pressure, the high pressure gas can be uniformly and quickly discharged through the crisscross disposed exhaust network, preventing the gas from being discharged untimely and causing the inner bag 2 still to be pressed by the high pressure gas, untimely filling or premature filling stoppage due to misjudgement, further increasing the filling volume of the liquid container during filling.

(17) In one embodiment of the present invention, the shape of the protrusion 511 is preferably rhombic and all the protrusions 511 are evenly arranged. The shape is very convenient to process, easy to shape, the edges are more uniform, and the edges of the first auxiliary air passages 52 and the second auxiliary air passages 512 formed can be ensured to be smoother, and the gas can be smoothly discharged, thereby further increasing the filling volume of the liquid container during filling. In addition, the uniform arrangement of the protrusions 511 can ensure that the gas discharge at various positions in the barrel can reach a more uniform state, and the efficiency of gas discharge is ensured. In this embodiment, the thickness at various positions of the entire separation bag 5 can be made nearly equal, that is, corresponding concave portions are formed on the inner surface opposite to the protrusions 511 on the outer surface. Of course, the thickness of the entire separation bag 5 can also be made unequal, so that the separation bag 5 has a thicker thickness at the protrusions 511.

(18) When in use, one embodiment of the liquid container is inverted and liquid is filled into the inner bag 2, as the liquid is continuously filled into the inner bag 2, under the gravitational effect of the liquid, the inner bag 2 and the separation bag 5 at the position of a barrel opening of the liquid container are first expanded and attached to the inner wall of the outer casing 1. As more and more of the liquid is being filled, the gas originally present between the separation bag 5 and the outer casing 1 is further discharged to the outside of the liquid container through the first auxiliary air passages 52 communicated with the ventilation structure 4 on the valve 3.

Embodiment 2

(19) The structure and principle of this embodiment are basically the same as those of the first embodiment, and the difference lie in: as shown in FIG. 5, the shape of the protrusions 511 is triangular, the triangular protrusion 511 is also very convenient to process, easy to shape, the edges are more uniform, and the edges of the first auxiliary air passages 52 and the second auxiliary air passages 512 formed can be ensured to be smoother, and the gas can be smoothly discharged.

Embodiment 3

(20) The structure and principle of this embodiment are basically the same as those of the first embodiment, and the difference lie in: as shown in FIG. 6 to FIG. 8, the convex portion 51 comprises an elongated convex strip 513, and at least one of the convex strips 513 extends from the bag opening of the separation bag 5 to a bottom of the separation bag 5. The disposition of the convex strips 513 can ensure that the first auxiliary air passages 52 formed are smooth from end to end, and that the gas discharge is smooth, thereby increasing the filling volume of the liquid container during filling. And the complete convex strip 513 is easy to process and convenient to shape. Specifically, the convex strips 513 are pleated and formed by self-clinging of the inner surface of the separation bag 5, that is, the pleated protrusions 511 directly formed by local self-clinging of the inner surface of the separation bag 5 partially, and the protrusion 511 can be formed by stacking a plurality of continuous pleats to further improve the exhaust effect.

Embodiment 4

(21) The structure and principle of the embodiment are basically the same as those of the third embodiment, and the difference lie in: an outer surface of the convex strip 513 is in an arc shape and the radius of the arc is smaller than the radius of the outer casing 1, and a smooth transition is between the convex strips 513 and the outer surface of the separation bag 5. The outer surface of the convex strip 513 has the arc with the radius smaller than the radius of the outer casing 1, so that even if the inner bag 2 is stretched to cause the separation bag 5 to fit on the inner surface of the outer casing 1, the convex strips 513 can be kept in line contact with the inner wall of the outer casing 1 as much as possible rather than in surface contact, further freeing up space for gas circulation, and helping to increase the filling volume of the liquid container during filling.

Embodiment 5

(22) The structure and principle of this embodiment are basically the same as those of the first embodiment, and the difference lie in: as shown in FIG. 9, the convex portions 51 are located on the inner surface of the separation bag 5, one end of the ventilation structure 4 is in connection with the outside air, and the other end is communicated with an inner cavity of the outer casing 1. At least one of the convex portions 51 extends from the bag opening of the separation bag 5 to the bottom of the separation bag 5. The bottom of the separation bag 5 is further provided with openings 53 extending to the convex portions 51. The number of the openings 53 is two and extend up to the top 55 of the separation bag 5. By having the openings 53 disposed at the bottom of the separation bag 5, the present invention ensures that the gas in the outer casing 1 can enter from the openings 53 to outer peripheral sides of the convex portions 51, and then the gas can be discharged from the first auxiliary air passages 52 to a ventilation structure along the convex portions 51 and then discharged out of the liquid container, thereby achieving the increase of filling volume of the liquid container during filling.

Embodiment 6

(23) The structure and principle of this embodiment are basically the same as those of the first embodiment, and the difference lie in: as shown in FIG. 10, the bottom of the separation bag 5 is further provided with the openings 53 extending to the top 55 of the separation bag 5. The number of the openings 53 is two and are respectively located at two opposite sides of the separation bag 5, and a hanging hole 54 is further provided at the top 55 on both sides of the separation bag 5. The separation bag 5 is hung on the inner bag 2 through the hanging holes 54 and connected to the inner bag 2.

Embodiment 7

(24) The structure and principle of this embodiment are basically the same as those of the first embodiment, and the difference lie in: as shown in FIG. 11, an inlet and outlet air valve 6 is fixedly connected to the outer casing 1, and a seal is formed between the inlet and outlet air valve 6 and the outer casing 1. The ventilation structure is a second venting passage disposed on the inlet and outlet air valve 6.

(25) The specific embodiments described herein are merely illustrative of the scope of the invention. A person skilled in the art can make various modifications or additions to the specific embodiments described or replace them in a similar manner, without departing from the spirit of the invention or beyond the scope defined by the appended claims.

(26) Although the terms outer casing 1, inner bag 2, valve 3, ventilation structure 4, separation bag 5, and the like are used a lot herein, the possibility of using other terms is not excluded. These terms are merely used to describe and explain the nature of the invention more conveniently; construing them as any of the additional restrictions is contrary to the scope of the present invention.

LIST OF REFERENCED PARTS

(27) 1 outer casing 2 inner bag 21 bag opening 3 valve 4 ventilation structure 41 first venting passage 5 separation bag 6 gas valve 51 convex portions 511 protrusions 512 second auxiliary air passages 513 convex strips 52 first auxiliary air passages 53 openings 54 hanging holes 55 top of the separation bag 56 bottom of the separation bag