Self-contained balancing mechanism

Abstract

The utility model discloses a self -force type balance mechanism, including balance box, first import and export end, second import and export end and middle cavity interface end are connected with first cavity, second cavity and third cavity communication, when first import and export end connects import end, and second import and export end connects export end, import end's pressure generally will be greater than export end's pressure to promote the mandrel to export end direction movement, import end and middle cavity will communicate to reach import end and middle cavity's pressure balance, it is worth noting that middle cavity pressure increases, and medium will pass the passageway of balance mechanism and enter import end, reach middle cavity and pressure source end self -balancing, and realize export end seal, avoid the problem of valve jam and middle cavity pressure excessive. The utility model is suitable for various liquid or gaseous medium has through pipeline self -carrying pressure medium, realizes middle cavity and pressure source end self -balancing's advantage.

Description

Technical Field

[0001] This utility model relates to the field of valves, specifically a self-balancing mechanism. Background Technology

[0002] Currently, wedge gate valves, double gate valves, and some ball valves on the market have the characteristic of retaining media in the middle cavity. Temperature changes or media infiltration can cause a sharp increase in pressure, resulting in abnormal overpressure in the middle cavity. In mild cases, the valve may become stuck and unable to open; in severe cases, the middle flange may deform and the media may leak out directly.

[0003] Traditional valve solutions and drawbacks:

[0004] 1. Drill a small hole in the inlet sealing surface to connect the middle cavity and the inlet end, which makes the valve a one-way sealing valve.

[0005] 2. Install a bypass manual valve to release abnormal pressure in the middle cavity through manual switching. This requires on-site personnel to operate, and to achieve dual-flow function, the number of bypass valves and installation space requirements are higher.

[0006] 3. A safety valve is installed in the valve cavity. When the pressure rises abnormally, it can be released by setting a safety value. When releasing, the recovery of the medium must be considered. If the medium is toxic or harmful, appropriate protective measures must be taken.

[0007] In conclusion, improvements are needed. Utility Model Content

[0008] The purpose of this utility model is to provide a self-balancing mechanism to solve the problems mentioned in the background art. It has the advantage of achieving self-balancing between the middle cavity and the pressure source end by using the pressure medium carried by the pipeline.

[0009] To achieve the above objectives, this utility model provides the following technical solution: a self-regulating balancing mechanism, comprising a balancing box, wherein the balancing box is provided with a first inlet / outlet end, a second inlet / outlet end, and a central cavity interface end, wherein the balancing box is provided with a first cavity, a second cavity, and a third cavity respectively communicating with the first inlet / outlet end, the second inlet / outlet end, and the central cavity interface end, wherein a mandrel is slidably connected within the balancing box, wherein a first piston and a second piston are sleeved at both ends of the mandrel, wherein an O-ring is provided in the middle of the mandrel, and a first process groove and a second process groove communicating between the first inlet / outlet end, the second inlet / outlet end, and the third cavity are provided.

[0010] By adopting the above technical solution, the first inlet / outlet end, the second inlet / outlet end, and the middle cavity interface end are respectively connected to the first cavity, the second cavity, and the third cavity. When the first inlet / outlet end is connected to the inlet end and the second inlet / outlet end is connected to the outlet end, the pressure at the inlet end is generally greater than the pressure at the outlet end, thereby pushing the mandrel to move towards the outlet end. The inlet end and the middle cavity will then be connected, thus achieving pressure balance between the inlet end and the middle cavity. It is worth noting that when the pressure in the middle cavity increases, the medium will enter the inlet end through the channel of the balancing mechanism. The medium can be liquid or gas, and the outlet end is not connected to the middle cavity, achieving self-balancing between the middle cavity and the pressure source end, avoiding valve jamming and excessive pressure in the middle cavity. The first inlet / outlet end and the second inlet / outlet end are connected to the third cavity via a first process tank and a second process tank. After the mandrel moves, the first process tank and the first inlet / outlet end are still in a connected state.

[0011] As a further embodiment of this utility model: the balance box is provided with end caps at both ends, and the end caps are connected to the balance box by bolts.

[0012] By adopting the above technical solution, the end cap is connected to the balance box by bolts.

[0013] Preferably, a first fixing ring is integrally connected to the middle of the mandrel, and the first fixing ring is provided with a first annular groove for accommodating an O-ring.

[0014] Preferably, both the first piston and the second piston are provided with two second annular grooves, and O-rings are provided in the second annular grooves.

[0015] As a further improvement of this utility model, nuts are threaded to both ends of the mandrel.

[0016] By adopting the above technical solution, the nut serves as a limit.

[0017] As a further improvement of this utility model, a retainer is provided at the first inlet / outlet end, the second inlet / outlet end, and the middle cavity interface end.

[0018] By adopting the above technical solution, the design of the card sleeve facilitates installation.

[0019] Compared with the prior art, the beneficial effects of this utility model are:

[0020] 1. The first inlet / outlet end, the second inlet / outlet end, and the middle cavity interface end are respectively connected to the first cavity, the second cavity, and the third cavity. When the first inlet / outlet end is connected to the inlet end and the second inlet / outlet end is connected to the outlet end, the pressure at the inlet end is generally greater than the pressure at the outlet end, thus pushing the mandrel to move towards the outlet end. The inlet end and the middle cavity will be connected, thereby achieving pressure balance between the inlet end and the middle cavity. It is worth noting that when the pressure in the middle cavity increases, the medium will enter the inlet end through the channel of the balancing mechanism. The medium can be liquid or gas, and the outlet end is not connected to the middle cavity, realizing self-balancing between the middle cavity and the pressure source end, avoiding valve jamming and excessive pressure in the middle cavity. The first inlet / outlet end and the second inlet / outlet end are connected to the third cavity via a first process tank and a second process tank. After the mandrel moves, the first process tank and the first inlet / outlet end are still connected.

[0021] 2. Eliminate the risk of valve jamming and leakage from the middle flange at the source.

[0022] Cost reduction and efficiency improvement: Significantly reduce the procurement and installation costs of bypass valves and eliminate labor maintenance expenses.

[0023] High safety: zero media leakage, closed-loop balance.

[0024] Low space requirement: Its compact built-in mechanism and lack of external peripherals make it ideal for space-constrained environments.

[0025] Easy installation and disassembly: Utilizing a compression fitting connection, it is more convenient than welding or flange connections, and also offers significantly improved vibration resistance.

[0026] Promoting valve intelligence: providing critical reliability assurance for unmanned pipeline systems, requiring no external intervention throughout the entire process;

[0027] 3. Through ingenious flow channels and differential pressure drive structure, the self-balancing pressure in the valve cavity is achieved, which is an important breakthrough in the passive safety design of valves. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the structure of an embodiment;

[0029] Figure 2 for Figure 1 A schematic diagram of the structure after removing the outer shell of the balance box;

[0030] Figure 3 for Figure 1 A sectional view;

[0031] Figure 4 This is a schematic diagram of the internal structure of the balance box;

[0032] Figure 5 This is a schematic diagram of the balance box structure;

[0033] Figure 6 for Figure 5 Cross-sectional view along the BB direction;

[0034] Figure 7 for Figure 5 A cross-sectional view along the CC direction;

[0035] Figure 8 for Figure 5 A cross-sectional view along the DD direction;

[0036] Figure 9 for Figure 1 A structural diagram from another perspective;

[0037] Figure 10 for Figure 9 A cross-sectional view along the EE direction.

[0038] In the diagram: 1. Balance box; 2. First inlet / outlet end; 3. Second inlet / outlet end; 4. Middle cavity interface end; 5. First cavity; 6. Second cavity; 7. Third cavity; 8. Mandrel; 9. First piston; 10. Second piston; 11. O-ring; 12. End cap; 13. Bolt; 14. First retaining ring; 15. First annular groove; 16. Second annular groove; 17. Nut; 18. Sleeve; 19. First process groove; 20. Second process groove. Detailed Implementation

[0039] The technical solutions in the embodiments of this utility model are described clearly and completely below. 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 are within the protection scope of this utility model.

[0040] In this embodiment of the utility model,

[0041] A self-balancing mechanism includes a balancing box 1, which has a first inlet / outlet end 2, a second inlet / outlet end 3, and a central cavity interface end 4. The balancing box 1 has a first cavity 5, a second cavity 6, and a third cavity 7 that are respectively connected to the first inlet / outlet end 2, the second inlet / outlet end 3, and the central cavity interface end 4. A mandrel 8 is slidably connected inside the balancing box 1. A first piston 9 and a second piston 10 are sleeved at both ends of the mandrel 8. An O-ring 11 is provided in the middle of the mandrel 8. A first process groove 19 and a second process groove 20 are provided between the first inlet / outlet end 2 and the second inlet / outlet end 3 and the third cavity 7.

[0042] The balance box 1 is provided with end caps 12 at both ends, and the end caps 12 are connected to the balance box 1 by bolts 13.

[0043] The mandrel 8 is integrally connected to the middle of a first fixing ring 14, and the first fixing ring 14 is provided with a first annular groove 15 for accommodating an O-ring 11.

[0044] The first piston 9 and the second piston 10 are each provided with two second annular grooves 16, and an O-ring 11 is provided in the second annular groove 16.

[0045] Nuts 17 are threaded to both ends of the mandrel 8.

[0046] The first inlet / outlet end 2, the second inlet / outlet end 3, and the middle cavity interface end 4 are all equipped with a retainer 18.

[0047] Working principle:

[0048] 1. The first inlet / outlet end, the second inlet / outlet end, and the middle cavity interface end are respectively connected to the first cavity, the second cavity, and the third cavity. When the first inlet / outlet end is connected to the inlet end and the second inlet / outlet end is connected to the outlet end, the pressure at the inlet end is generally greater than the pressure at the outlet end, thus pushing the mandrel to move towards the outlet end. The inlet end and the middle cavity will be connected, thereby achieving pressure balance between the inlet end and the middle cavity. It is worth noting that when the pressure in the middle cavity increases, the medium will enter the inlet end through the channel of the balancing mechanism. The medium can be liquid or gas, and the outlet end is not connected to the middle cavity, realizing self-balancing between the middle cavity and the pressure source end, avoiding valve jamming and excessive pressure in the middle cavity. The first inlet / outlet end and the second inlet / outlet end are connected to the third cavity via a first process tank and a second process tank. After the mandrel moves, the first process tank and the first inlet / outlet end are still connected.

[0049] 2. Eliminate the risk of valve jamming and leakage from the middle flange at the source.

[0050] Cost reduction and efficiency improvement: Significantly reduce the procurement and installation costs of bypass valves and eliminate labor maintenance expenses.

[0051] High safety: zero media leakage, closed-loop balance.

[0052] Low space requirement: Its compact built-in mechanism and lack of external peripherals make it ideal for space-constrained environments.

[0053] Easy installation and disassembly: Utilizing an 18-type compression fitting connection, it is more convenient than welding or flange connections, and also offers significantly improved vibration resistance.

[0054] Promoting valve intelligence: providing critical reliability assurance for unmanned pipeline systems, requiring no external intervention throughout the entire process;

[0055] 3. Through ingenious flow channels and differential pressure drive structure, the self-balancing pressure in the valve cavity is achieved, which is an important breakthrough in the passive safety design of valves.

[0056] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A self-balancing mechanism, characterized in that: The device includes a balance box (1), which is provided with a first inlet / outlet end (2), a second inlet / outlet end (3) and a middle cavity interface end (4). The balance box (1) is provided with a first cavity (5), a second cavity (6) and a third cavity (7) respectively connected to the first inlet / outlet end (2), the second inlet / outlet end (3) and the middle cavity interface end (4). A mandrel (8) is slidably connected in the balance box (1). A first piston (9) and a second piston (10) are sleeved at both ends of the mandrel (8). An O-ring (11) is provided in the middle of the mandrel (8). A first process groove (19) and a second process groove (20) are provided between the first inlet / outlet end (2) and the second inlet / outlet end (3) and the third cavity (7).

2. The self-balancing mechanism according to claim 1, characterized in that: The balance box (1) is provided with end caps (12) at both ends, and the end caps (12) are connected to the balance box (1) by bolts (13).

3. The self-balancing mechanism according to claim 1, characterized in that: The mandrel (8) is integrally connected to a first fixing ring (14) in the middle, and the first fixing ring (14) is provided with a first annular groove (15) for accommodating an O-ring.

4. The self-balancing mechanism according to claim 1, characterized in that: The first piston (9) and the second piston (10) are each provided with two second annular grooves (16), and an O-ring (11) is provided in the second annular groove (16).

5. The self-balancing mechanism according to claim 1, characterized in that: Nuts (17) are threaded to both ends of the mandrel (8).

6. The self-balancing mechanism according to claim 1, characterized in that: The first inlet / outlet end (2), the second inlet / outlet end (3), and the middle cavity interface end (4) are all provided with a retainer (18).

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