A bidirectional balancing valve

Abstract

The present application belongs to the technical field of balance valve, and particularly relates to a bidirectional balance valve, which comprises a hollow valve body, a first valve core assembly and a second valve core assembly. The first valve core assembly comprises a first valve core, a first support seat with a first air hole and a first elastic member. The first valve core is sleeved in the valve body. The first support seat is detachably connected to the open end of the valve body. The first elastic member is arranged between the first support seat and the first valve core. The second valve core assembly comprises a second valve core, a second support seat with a second air hole and a second elastic member. The second valve core is sleeved in the first valve core. The second support seat is detachably connected to the open end of the first valve core. The second elastic member is arranged between the second support seat and the second valve core. The present application is used to solve the technical problem that the current balance valve has large size and weight, and is inconvenient to be applied in the field of aerospace.

Description

Technical Field

[0001] This invention belongs to the field of balancing valve technology, and specifically relates to a bidirectional balancing valve. Background Technology

[0002] The main function of a balancing valve is to maintain the pressure balance within a stationary volume system. When the pressure in the stationary volume system increases, the balancing valve can release pressure; when the pressure in the stationary volume system decreases, the balancing valve can add air to maintain a constant pressure within the stationary volume system.

[0003] The prior art discloses a patent application entitled "Balancing Valve", with authorization announcement number CN 208565121 U and authorization announcement date of 2019.03.01. The patent application includes a valve body with pressure regulating devices at both ends. The pressure regulating device includes a valve sleeve, a pressure regulating screw / bolt, and a second elastic element. The valve sleeve is connected to the valve body, and the pressure regulating screw / bolt is threaded onto the valve sleeve. The second elastic element is disposed in the inner cavity of the valve sleeve and rests between the pressure regulating screw / bolt and the first end of the main valve core. The main valve core is in sealing contact with the valve sleeve through a first sealing ring fitted onto the first end, thereby isolating the inner cavity of the valve sleeve from the first region of the first valve chamber. The valve sleeve or the pressure regulating screw / bolt of the pressure regulating device has a vent hole connecting the inner cavity of the valve sleeve to external air.

[0004] Although the aforementioned existing technologies achieve bidirectional pressure regulation and balance, the balance valve of this structure is large in size and heavy in weight, and has a high manufacturing cost, which limits its use in some aerospace fields where size and weight requirements are high. Summary of the Invention

[0005] In view of the shortcomings of the existing technology, the purpose of this invention is to provide a bidirectional balance valve to solve the technical problem that the current balance valves are too large in size and weight, making them unsuitable for the aerospace field.

[0006] To achieve the above objectives, the technical solution of the present invention is as follows: a bidirectional balancing valve, comprising a hollow valve body, a first valve core assembly, and a second valve core assembly. The first valve core assembly includes a first valve core, a first support seat having a first vent hole, and a first elastic element. One end of the valve body is open, and the other end is provided with a first vent hole. The first valve core is sleeved within the valve body, and a vent gap exists between the side wall of the valve body and the side wall of the first valve core. The first support seat is detachably connected to the open end of the valve body. The first elastic element is disposed between the first support seat and the first valve core, elastically supporting the first valve core to press against the end of the valve body near the first vent hole, thereby achieving a seal on the first vent hole.

[0007] The second valve core assembly includes a second valve core, a second support base with a second vent hole, and a second elastic element; the first valve core is hollow, with an open end near the first vent hole and a second vent hole at the other end; the second valve core is sleeved inside the first valve core, and there is a vent gap between the sidewall of the second valve core and the sidewall of the first valve core; the second support base is detachably connected to the open end of the first valve core; the second elastic element is disposed between the second support base and the second valve core, elastically supporting the second valve core to press against the end of the first valve core near the second vent hole, so as to achieve a seal on the second vent hole.

[0008] Preferably, an annular first sealing protrusion is provided on the end face of the first valve core near the first vent hole, and the first sealing protrusion abuts against the end of the valve body near the first vent hole to achieve sealing of the first vent hole.

[0009] Preferably, the first valve core assembly further includes a first sealing gasket disposed between the first sealing protrusion and the valve body.

[0010] Preferably, the first support base and the valve body are connected by a thread.

[0011] Preferably, the first elastic element is a first compression spring, which is sleeved outside the first valve core and its end abuts against the first support seat.

[0012] Preferably, an annular second sealing protrusion is provided on the end face of the second valve core near the second vent hole, and the second sealing protrusion abuts against the end of the first valve core near the second vent hole to achieve sealing of the first vent hole.

[0013] Preferably, the second valve core assembly further includes a second sealing gasket disposed between the second sealing protrusion and the first valve core.

[0014] Preferably, the second support base and the first valve core are connected by a thread.

[0015] Preferably, the second elastic element is a second compression spring, which is supported between the second support seat and the second valve core.

[0016] Preferably, a dust cap is connected to the end of the valve body near the first vent, and a filter screen is provided between the dust cap and the valve body.

[0017] The beneficial effects of adopting the technical solution of this invention are as follows:

[0018] The second valve core assembly of the present invention is installed inside the first valve core of the first valve core assembly to form a one-way valve, and the first valve core assembly is installed in the valve body to form another one-way valve in the opposite direction, thereby constituting a balanced valve that can be controlled in both directions. The two sets of valve core assemblies are nested and overlapped together, saving space, reducing volume and weight, and making it easy to apply in the aerospace field where volume and weight requirements are high. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of an embodiment of a bidirectional balancing valve.

[0020] in, Figure 1 In the diagram, 1-valve body, 11-first vent hole, 2-first valve core assembly, 21-first sealing gasket, 22-first valve core, 221-second vent hole, 23-first elastic element, 24-first support base, 241-first vent hole, 3-filter screen, 4-dust cap, 5-second valve core assembly, 51-second support base, 511-second vent hole, 52-second elastic element, 53-second valve core, 54-second sealing gasket. Detailed Implementation

[0021] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments, and do not limit the scope of the present invention.

[0022] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0023] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0024] The specific implementation method is as follows:

[0025] Example 1, as Figure 1 As shown, a bidirectional balancing valve includes a valve body 1, a first valve core assembly 2, and a second valve core assembly 5. The valve body 1 is a hollow cylindrical shape; the right end of the valve body 1 is open, and a first vent hole 11 is provided at the center of the left end face. The diameter of the first vent hole 11 is smaller than the radius of the hollow cavity of the valve body 1.

[0026] In this embodiment, the outer side of the right end of the valve body 1 is provided with an external thread for connecting the device that needs to be pressure regulated, and a sealing ring is provided on the left side immediately adjacent to the external thread to ensure the tightness of the connection between the valve body and the device that needs to be pressure regulated.

[0027] The second valve core assembly 5 is installed inside the first valve core assembly 2, and the two together form a one-way valve. The second valve core assembly 5 is connected to the first valve core assembly 2 and installed inside the valve body 1. The first valve core assembly 2 and the valve body 1 cooperate to form another one-way valve. Thus, the valve body 1, the first valve core assembly 2 and the second valve core assembly 5 constitute a balanced valve to achieve bidirectional pressure regulation control. The valve body 1, the first valve core assembly 2 and the second valve core assembly 5 are nested and overlapped in sequence, reducing the overall volume and weight.

[0028] The first valve core assembly 2 includes a first valve core 22, a first support base 24, and a first elastic element 23. Specifically, the first valve core 22 is sleeved inside the valve body 1 from the open end of the valve body 1. The first valve core 22 can slide left and right inside the valve body 1, and a venting gap for air passage is provided between the first valve core 22 and the side wall of the valve body 1. The first support base 24 is detachably connected to the open end of the valve body 1, and the first support base 24 stops the first valve core 22. The first elastic element 23 is disposed between the first support base 24 and the first valve core 22. The first elastic element 23 provides elastic support to the left of the first valve core 22 and supports the left end of the first valve core 22 to press against the end face of the valve body 1 near the first vent hole 11, so as to seal the first vent hole 11. A first vent hole 241 is provided on the first support 24, which runs through the left and right sides. When the one-way valve formed by the first valve core assembly 2 and the valve body is opened, air will automatically pass through the vent gap between the first valve core 22 and the side wall of the valve body 1 and the first vent hole 241 to the right, so as to achieve one-way ventilation.

[0029] In this embodiment, the interior of the first valve core 22 is hollow, the left end of the first valve core 22 is open, and the right end of the first valve core 22 is provided with a second vent hole 221, and the diameter of the second vent hole 221 is smaller than the radius of the cavity inside the first valve core 22.

[0030] The second valve core assembly 5 includes a second valve core 53, a second support base 51, and a second elastic element 52. Specifically, the second valve core 53 is sleeved inside the first valve core 22 from the open end on the left side. The second valve core 53 can slide left and right relative to the first valve core 22, and a vent gap for air passage is provided between the second valve core 53 and the side wall of the first valve core 22. The second support base 51 is detachably connected to the open end on the left side of the first valve core 22 to stop the second valve core 53. The second elastic element 52 is disposed between the second valve core 53 and the second support base 51, and provides elastic support to the right of the second valve core 53. The elastic support keeps the right end face of the second valve core 53 pressed against the right end face inside the first valve core 22 to seal the second vent hole 221. A second vent hole 511 is provided on the second support 51, which runs through the left and right sides. The second valve core assembly 5 and the first valve core 22 form a one-way valve. When the one-way valve is open, air passes from right to left through the vent gap between the side walls of the second valve core 53 and the first valve core 22 and the second vent hole 511.

[0031] In this embodiment, a bidirectional balancing valve is used such that it is connected to a device requiring pressure regulation via an external thread on the valve body 1. When the internal pressure of the device requiring pressure regulation is too high, the pressure passes through the first vent hole 241 and the second vent hole 221, pressing against the second valve core 53. The second valve core 53 slides to the left, squeezing the second elastic element 52. The right end face of the second valve core 53 disengages from the first valve core 22, opening the vent gap between the side walls of the second valve core 53 and the first valve core 22, as well as the second vent hole 511. The internal pressure of the device requiring pressure regulation is released to the left, and the internal pressure is adjusted. When the external pressure of the device requiring pressure regulation is greater than the internal pressure, the gas pressure presses against the first valve core 22, which is connected to the second valve core assembly 5, from left to right. The first valve core 22 slides to the right, squeezing the first elastic element 23. The left end face of the first valve core 22 disengages from the valve body 1, opening the first vent hole 11 and causing the internal and external pressures to tend towards balance. The second valve core assembly 5 of the balance valve is installed and housed inside the first valve core 22. The first valve core assembly 2 and the second valve core assembly 5 are installed and housed inside the valve body 1. The components are arranged in an overlapping manner, which reduces the overall volume and weight of the balance valve and facilitates its application in the aerospace field.

[0032] Furthermore, an annular first sealing protrusion (not shown in the figure) is provided on the left end face of the first valve core 22. When the first valve core 22 seals the first vent hole 11, the annular first sealing protrusion presses against the valve body 1, ensuring the sealing performance.

[0033] Furthermore, the first valve core assembly 2 also includes a first sealing gasket 21. Specifically, the first sealing gasket 21 is placed inside the valve body 1 at the left end, which allows the annular first sealing protrusion to press against the first sealing gasket 21 and deform the first sealing gasket 21 when the first valve core 22 seals the first vent hole 11, thereby further improving the sealing performance.

[0034] Furthermore, the first support seat 24 and the valve body 1 are connected by a threaded connection. A threaded connection is a detachable fixed connection, which has the advantages of simple structure, reliable connection, and convenient assembly and disassembly.

[0035] Furthermore, the first elastic element 23 is a compression spring, which can store energy after being compressed and can repeatedly perform compression to store energy and restore deformation to release deformation energy. In this embodiment, the compression spring is a cylindrical helical spring. Specifically, a stop edge is provided on the outside of the first valve core 22, the cylindrical helical spring is sleeved on the first valve core 22, and the other end abuts against the first support seat 24.

[0036] Furthermore, an annular second sealing protrusion is provided on the right end face of the second valve core 53. When the second valve core seals the second vent hole 221, the annular second sealing protrusion presses against the first valve core 22 to achieve a seal, ensuring sealing performance.

[0037] Furthermore, the second valve core assembly 5 also includes a second sealing gasket 54. Specifically, the second sealing gasket 54 is placed on the right end face inside the first valve core 22. When the second valve core 53 seals the second vent hole 221, the annular second sealing protrusion squeezes and deforms the second sealing gasket 54, further ensuring the sealing performance.

[0038] Furthermore, the second support 51 and the first valve core 22 are connected by a threaded connection. A threaded connection is a detachable fixed connection, which has the advantages of simple structure, reliable connection, and convenient assembly and disassembly.

[0039] Furthermore, the second elastic element 52 is a compression spring, which can be a cylindrical or pagoda-shaped helical spring. In this embodiment, the compression spring is a cylindrical helical spring.

[0040] In this embodiment, the second valve core 53 has an opening along its circumference, open at the left end and closed at the right end. The right end of the cylindrical helical spring extends into the opening of the second valve core 53, and the left end abuts against the second support seat 51. The opening ensures the stability of the second elastic element 52.

[0041] Furthermore, to prevent impurities in the air from entering the pressure-regulating device, a filter screen 3 is installed at the left end of the valve body 1. Specifically, a dust cap 4 is connected to the left end of the valve body 1 via internal and external threads, and a filter screen is placed between the dust cap and the valve body 1 to filter impurities.

[0042] The present invention has been described above by way of example with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvements made using the technical solution of the present invention, or the direct application of the concept and technical solution of the present invention to other occasions without modification, are all within the protection scope of the present invention.

Claims

1. A bidirectional balancing valve, comprising a hollow valve body, a first valve core assembly, and a second valve core assembly, characterized in that, The first valve core assembly includes a first valve core, a first support base with a first vent hole, and a first elastic element; one end of the valve body is open, and the other end is provided with a first vent hole; the first valve core is sleeved in the valve body, and there is a vent gap between the side wall of the valve body and the side wall of the first valve core; the first support base is detachably connected to the open end of the valve body; the first elastic element is disposed between the first support base and the first valve core, elastically supporting the first valve core to press against the end of the valve body near the first vent hole, so as to achieve a seal on the first vent hole; the second valve core assembly includes... The first valve core is hollow, with an open end near the first vent and a second vent at the other end; the second valve core is sleeved inside the first valve core, and there is a vent gap between the sidewall of the second valve core and the sidewall of the first valve core; the second support is detachably connected to the open end of the first valve core; the second elastic element is disposed between the second support and the second valve core, elastically supporting the second valve core to press against the end of the first valve core near the second vent, so as to seal the second vent. An annular first sealing protrusion is provided on the end face of the first valve core near the first vent hole. The first sealing protrusion abuts against the end of the valve body near the first vent hole to seal the first vent hole. An annular second sealing protrusion is provided on the end face of the second valve core near the second vent hole. The second sealing protrusion abuts against the end of the first valve core near the second vent hole to seal the first vent hole.

2. The bidirectional balancing valve according to claim 1, characterized in that, The first valve core assembly further includes a first sealing gasket disposed between the first sealing protrusion and the valve body.

3. A bidirectional balancing valve according to claim 2, characterized in that, The first support base and the valve body are connected by a thread.

4. A bidirectional balancing valve according to claim 3, characterized in that, The first elastic element is a first compression spring, which is sleeved outside the first valve core and its end abuts against the first support seat.

5. A bidirectional balancing valve according to claim 1, characterized in that, The second valve core assembly further includes a second sealing gasket disposed between the second sealing protrusion and the first valve core.

6. A bidirectional balancing valve according to claim 5, characterized in that, The second support base and the first valve core are connected by a thread.

7. A bidirectional balancing valve according to claim 6, characterized in that, The second elastic element is a second compression spring, which is supported between the second support seat and the second valve core.

8. A bidirectional balancing valve according to any one of claims 1-7, characterized in that, A dust cap is connected to the end of the valve body near the first vent, and a filter screen is provided between the dust cap and the valve body.

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