Gas type energy accumulator

Abstract

The utility model provides a gas-type energy accumulator, which comprises a shell, a gas-type energy accumulator, a gas-type energy accumulator, a gas-type energy accumulator and a gas-type energy accumulator, the air cup cover is connected to the opening end of the shell in a sealed mode, and a liquid flow channel is formed in the air cup cover; the oil seal mechanism is arranged in the shell in a sliding and sealing mode, one end of the oil seal mechanism is provided with a sealing head capable of extending into the liquid flow channel, the other end of the oil seal mechanism is opposite to the inner cavity, and the space between the oil seal mechanism and the gas cup cover is filled with an oil seal medium capable of balancing gas pressure in the inner cavity. The gas type energy accumulator is used for solving the problem of gas leakage in the process of transporting and using the gas type energy accumulator.

Description

Technical Field

[0001] This utility model relates to the field of energy storage technology, and in particular to a gas energy storage device. Background Technology

[0002] The description in this section provides only background information related to the disclosure of this utility model and does not constitute prior art.

[0003] Currently, existing dry accumulators pose a risk of gas leakage during transportation through the O-ring between the end cap and the casing. The amount of gas leakage through this gap is roughly proportional to the pressure difference across the end cap. Therefore, when the gas pressure injected into the accumulator exceeds 100 bar, the potential gas leakage may be 10 times higher than at a charging pressure of 10 bar. Furthermore, the risk is even higher during high-pressure gas charging due to the significant pressure difference across the end cap.

[0004] It should be noted that the above introduction to the technical background is only for the purpose of providing a clear and complete explanation of the technical solutions of this utility model and facilitating understanding by those skilled in the art. It should not be assumed that these technical solutions are known to those skilled in the art simply because they have been described in the background section of this utility model. Utility Model Content

[0005] The purpose of this invention is to provide a gas accumulator to solve the gas leakage problem that exists during the transportation and use of gas accumulators.

[0006] The above-mentioned objectives of this utility model are mainly achieved by the following technical solutions:

[0007] This utility model provides a gas accumulator, the gas accumulator comprising:

[0008] The casing has an internal cavity for containing gas;

[0009] A gas cup lid is sealed to the open end of the housing, and a liquid flow channel is provided on the gas cup lid;

[0010] An oil seal mechanism is slidably and sealingly disposed within the housing. One end of the oil seal mechanism has a sealing head that can extend into the liquid flow channel, and the other end is opposite to the inner cavity. The space between the oil seal mechanism and the gas cup cover is filled with an oil seal medium that can balance the gas pressure in the inner cavity.

[0011] According to one embodiment of the present invention, the gas accumulator has a working state in which the sealing head is disengaged from the liquid flow channel and the oil sealing mechanism is moved away from the gas cup cover.

[0012] According to one embodiment of the present invention, the gas accumulator has a balanced state. In the balanced state, the sealing head is sealed in the liquid flow channel, and the oil sealing medium between the oil sealing mechanism and the gas cup cover forms an oil sealing ring. The pressure of the oil sealing ring is balanced with the gas pressure in the inner cavity.

[0013] According to one embodiment of the present invention, the oil seal mechanism has an oil seal plug and a sealing structure disposed between the oil seal plug and the housing.

[0014] According to one embodiment of the present invention, the sealing structure includes a main sealing structure and an auxiliary sealing ring. The oil seal mechanism has a gas cup body connected to the sealing head. The outer diameter of the gas cup body is larger than the outer diameter of the sealing head. The main sealing structure is sealed between the gas cup body and the housing. The auxiliary sealing ring is sleeved on the sealing head.

[0015] According to one embodiment of the present invention, the main sealing structure includes a main sealing ring and a sealing gasket, the main sealing ring and the sealing gasket being disposed at intervals on the gas cup body, and the main sealing ring including an O-ring inner ring and a sealing outer ring sequentially sleeved on each other.

[0016] According to one embodiment of the present invention, both the sealing gasket and the sealing outer ring are made of polytetrafluoroethylene material.

[0017] According to one embodiment of the present invention, the oil seal mechanism has a receiving groove formed on the side facing the inner cavity, and the receiving groove is connected to the inner cavity.

[0018] According to one embodiment of the present invention, the cross-sectional area of ​​the oil seal ring is smaller than the cross-sectional area of ​​the inner cavity.

[0019] According to one embodiment of the present invention, the internal pressure of the gas accumulator is 100 bar to 140 bar.

[0020] Compared with the prior art, the technical solution of this utility model has the following features and advantages:

[0021] The gas accumulator of this invention, by filling the shell with an oil-sealing medium, can reduce and / or even prevent gas leakage from the gas accumulator during transportation or long-term storage, thereby improving the service life of the gas accumulator. Attached Figure Description

[0022] Figure 1 This is a cross-sectional structural schematic diagram of the gas accumulator of this utility model.

[0023] Figure 2This is a cross-sectional structural schematic diagram of the oil sealing mechanism of the gas accumulator of this utility model.

[0024] Figure 3 This is a cross-sectional structural diagram of the gas accumulator of this utility model in its working state.

[0025] Figure 4 This is a cross-sectional structural diagram of the gas accumulator of this utility model in equilibrium state.

[0026] Explanation of icon numbers:

[0027] 1. Shell; 11. Inner cavity; 12. Open end; 13. Ring protrusion; 2. Gas cup cover; 21. Liquid flow channel; 22. Sealing ring; 23. Ring groove; 3. Oil seal mechanism; 31. Sealing head; 32. Oil seal plug; 33. Sealing structure; 331. Main sealing structure; 332. Main sealing ring; 3321. O-ring inner ring; 3322. Sealing outer ring; 333. Sealing gasket; 34. Gas cup body; 35. Receiving groove; 4. Oil seal medium; 41. Oil seal ring. Detailed Implementation

[0028] To enable those skilled in the art to better understand the technical solutions of this utility model, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

[0029] It should be noted that when an element is referred to as being "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only embodiments.

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0031] like Figure 1As shown, this utility model provides a gas accumulator, including a housing 1, a gas cup cover 2, and an oil sealing mechanism 3. The housing 1 has an inner cavity 11 for containing gas. The gas cup cover 2 is sealed to the open end 12 of the housing 1, and a liquid flow channel 21 is provided on the gas cup cover 2. The oil sealing mechanism 3 is slidably and sealingly disposed in the housing 1. One end of the oil sealing mechanism 3 has a sealing head 31 that can extend into the liquid flow channel 21, and the other end is opposite to the inner cavity 11. An oil sealing medium 4 that can balance the gas pressure in the inner cavity 11 is filled between the oil sealing mechanism 3 and the gas cup cover 2.

[0032] The gas accumulator of this utility model, by setting an oil sealing mechanism 3 inside the housing 1 and filling the space between the oil sealing mechanism 3 and the gas cup cover 2 with an oil sealing medium 4, can reduce and / or even avoid gas leakage from the gas accumulator during transportation or long-term storage, thereby improving the service life of the gas accumulator.

[0033] In this embodiment, the oil sealing medium 4 can be filled according to the cost of the assembly process. There are three main filling methods: The first method is to first fill the inner cavity 11 with gas, for example, to 105 bar, and then pump the oil into the chamber between the gas cup cover 2 and the oil sealing mechanism 3, for example, pump the oil pressure to its working pressure of 135 bar, and then release the oil in the chamber until the oil sealing medium 4 is formed; The second method is to fill the housing 1 with gas, and then use the pressure of the oil (for example, the maximum pressure of 135 bar) to push the gas cup cover 2 and the oil sealing mechanism 3 into the housing 1 together. When the pressure of the oil is released, the oil sealing medium 4 is formed; The third method is to fill the housing 1 with gas, and then push the oil sealing mechanism 3 with mechanical external force to fill the oil between the oil sealing mechanism 3 and the gas cup cover 2.

[0034] Specifically, the gas accumulator in this embodiment is particularly suitable for leak-proof protection of gas accumulators with working pressures of 100 bar to 140 bar. The gas accumulator has a generally cylindrical shell 1, with an open end 12 at one end and a closed end at the other. A gas cup cover 2 is generally cylindrical, with a through-flow liquid channel 21 that can connect to an external hydraulic system to inject oil into the shell 1. A sealing ring 22 is fitted on the outer side of the gas cup cover 2 to form a seal with the inner wall of the shell 1. In this embodiment, the gas cup cover 2 and the shell 1 are connected by a snap-fit ​​mechanism. For example, an annular groove 23 is formed on the outer wall of the gas cup cover 2, and an annular ridge 13 protrudes from the inner wall of the shell 1. The annular ridge 13 can engage with the annular groove 23, thereby connecting the gas cup cover 2 and the shell 1.

[0035] The oil seal mechanism 3 is located inside the housing 1, with one end facing the inner cavity 11 of the housing 1 and the other end forming a sealing head 31. The oil seal mechanism 3 is slidably and sealingly disposed along the axial direction of the housing 1 (i.e., towards or away from the opening end 12 of the housing 1), so that the sealing head 31 can extend into or away from the liquid flow channel 21 of the gas cup cover 2. In this embodiment, the space between the oil seal mechanism 3 and the gas cup cover 2 is filled with an oil seal medium 4 that can balance the gas pressure in the inner cavity 11. The oil seal medium 4 can be, for example, ordinary oil or other liquids. This invention does not limit this. The oil seal medium 4 can balance the gas pressure in the inner cavity 11, thereby effectively preventing gas leakage in the inner cavity 11. At the same time, the oil seal medium 4 can also provide lubrication for the seal between the oil seal mechanism 3 and the housing 1, improving the service life of the oil seal mechanism 3.

[0036] In one embodiment of this utility model, such as Figure 3 As shown, the gas accumulator has an operating state in which the sealing head 31 is disengaged from the liquid flow channel 21 and the oil sealing mechanism 3 is moved away from the gas cup cover 2. In this embodiment, the pressure of the oil sealing medium 4 in this operating state can be maintained at 100 bar to 140 bar, for example 135 bar, which is exactly equal to the gas pressure in the inner cavity 11.

[0037] In another embodiment of this utility model, such as Figure 4 As shown, the gas accumulator has a balanced state. In this balanced state, the sealing head 31 is sealed within the liquid flow channel 21. The oil sealing medium 4 between the oil sealing mechanism 3 and the gas cup cover 2 forms an oil sealing ring 41. The pressure of the oil sealing ring 41 is balanced with the gas pressure in the inner cavity 11. In this embodiment, the pressure of the oil sealing ring 41 can be, for example, 119 bar, while the gas pressure in the inner cavity 11 is 105 bar. The pressure of the oil sealing ring 41 is slightly higher than the gas pressure in the inner cavity 11, which prevents gas leakage and achieves the purpose of balancing the pressure in the inner cavity 11, thereby enabling the gas accumulator to maintain its original state during transportation or long-term storage.

[0038] In one embodiment of this utility model, such as Figure 2 As shown, the oil seal mechanism 3 has an oil seal plug 32 and a sealing structure 33 that is disposed between the oil seal plug 32 and the housing 1.

[0039] Specifically, the sealing structure 33 includes a main sealing structure 331, and the oil seal plug 32 has a gas cup body 34 connected to the sealing head 31. The outer diameter of the gas cup body 34 is larger than the outer diameter of the sealing head 31. The main sealing structure 331 is sealed between the gas cup body 34 and the housing 1.

[0040] In this embodiment, the main sealing structure 331 includes a main sealing ring 332 and a sealing gasket 333. The main sealing ring 332 and the sealing gasket 333 are spaced apart on the gas cup body 34. The main sealing ring 332 includes an O-ring inner ring 3321 and a sealing outer ring 3322 sequentially fitted together, forming a dynamic sealing structure. The O-ring inner ring 3321 can generate a radially outward thrust on the sealing outer ring 3322, thereby achieving a sliding seal between the main sealing ring 332 and the inner wall of the housing 1. In this embodiment, both the sealing gasket 333 and the sealing outer ring 3322 are made of polytetrafluoroethylene (PTFE). Since PTFE has a lower coefficient of friction than rubber, using the sealing gasket 333 and the sealing outer ring 3322 can reduce the friction between the oil seal plug 32 and the housing 1, facilitating the movement of the oil seal plug 32 within the housing 1, and providing higher wear resistance.

[0041] Furthermore, the sealing structure 33 also includes an auxiliary sealing ring 334, which is sleeved on the outside of the sealing head 31. When the sealing head 31 extends into the liquid flow channel 21 of the gas cup cover 2, it is used to seal the gap between the sealing head 31 and the liquid flow channel 21 to prevent oil leakage in the annulus between the gas cup cover 2 and the oil sealing mechanism 3.

[0042] In one embodiment of this utility model, a receiving groove 35 is formed on the side of the oil seal mechanism 3 facing the inner cavity 11. The receiving groove 35 is connected to the inner cavity 11. The arrangement of the receiving groove 35 can increase the force exerted by the gas in the inner cavity 11 on the oil seal mechanism 3, which is beneficial to the smooth movement of the oil seal mechanism 3 within the housing 1. Specifically, the receiving groove is generally hemispherical, which can evenly distribute the pressure of the gas medium in the inner cavity 11 on the oil seal mechanism 3, while ensuring the mechanical strength of the oil seal mechanism 3.

[0043] In one embodiment of this invention, the cross-sectional area of ​​the oil seal ring 41 is smaller than the cross-sectional area of ​​the inner cavity 11. This structural design allows the pressure on the oil side of the oil seal mechanism 3 to be higher than the pressure on its gas side, thereby further preventing gas leakage from the inner cavity 11.

[0044] Furthermore, in this invention, the diameter of the liquid flow channel 21 can be designed to be less than or equal to the diameter of the inner cavity 11. Preferably, the diameter of the liquid flow channel 21 is comparable to the diameter of the inner cavity 11. This design facilitates reducing the pressure required to move the gas cup. Because during the initial movement of the gas cup, due to the incompressibility of oil, the pressure of the oil seal ring 41 drops to almost zero. In order for the gas cup to move, the diameter of the liquid flow channel 21 should be designed to be as large as possible, for example, close to the diameter of the inner cavity 11.

[0045] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above descriptions are merely specific embodiments of this utility model and are not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A gas-type energy accumulator, characterized in that, The gas accumulator includes: The casing has an internal cavity for containing gas; A gas cup lid is sealed to the open end of the housing, and a liquid flow channel is provided on the gas cup lid; An oil seal mechanism is slidably and sealingly disposed within the housing. One end of the oil seal mechanism has a sealing head that can extend into the liquid flow channel, and the other end is opposite to the inner cavity. The space between the oil seal mechanism and the gas cup cover is filled with an oil seal medium that can balance the gas pressure in the inner cavity.

2. The gas accumulator as described in claim 1, characterized in that, The gas accumulator has an operating state in which the sealing head is disengaged from the liquid flow channel and the oil sealing mechanism is moved away from the gas cup cover.

3. The gas accumulator as described in claim 1, characterized in that, The gas accumulator has a balanced state. In this balanced state, the sealing head is sealed in the liquid flow channel, and the oil sealing medium between the oil sealing mechanism and the gas cup cover forms an oil sealing ring. The pressure of the oil sealing ring is balanced with the gas pressure in the inner cavity.

4. The gas accumulator as described in any one of claims 1 to 3, characterized in that, The oil seal mechanism has an oil seal plug and a sealing structure that is disposed between the oil seal plug and the housing.

5. The gas accumulator as described in claim 4, characterized in that, The sealing structure includes a main sealing structure and an auxiliary sealing ring. The oil seal plug has a gas cup body connected to the sealing head. The outer diameter of the gas cup body is larger than the outer diameter of the sealing head. The main sealing structure is sealed between the gas cup body and the housing. The auxiliary sealing ring is sleeved on the sealing head.

6. The gas accumulator as described in claim 5, characterized in that, The main sealing structure includes a main sealing ring and a sealing gasket, which are spaced apart on the gas cup body. The main sealing ring includes an O-ring inner ring and a sealing outer ring that are sequentially fitted together.

7. The gas accumulator as described in claim 6, characterized in that, Both the sealing gasket and the sealing outer ring are made of polytetrafluoroethylene (PTFE).

8. The gas accumulator as described in claim 1, characterized in that, The oil seal mechanism has a receiving groove on the side facing the inner cavity, and the receiving groove is connected to the inner cavity.

9. The gas accumulator as described in claim 3, characterized in that, The cross-sectional area of ​​the oil seal ring is smaller than the cross-sectional area of ​​the inner cavity.

10. The gas accumulator as described in claim 1, characterized in that, The internal pressure of the gas accumulator is 100 bar to 140 bar.

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