Constant pressure type automatic exhaust valve

Abstract

The utility model relates to the technical field of exhaust valves, in particular to a constant pressure type automatic exhaust valve, which comprises a valve body, a floating ball, a valve seat, a cylinder body and a valve cover, the floating ball is arranged in the valve body, the cylinder body is fixed on the valve body through the valve seat and is communicated with the valve body, the valve cover is covered on the cylinder body, exhaust holes are arranged on the periphery of the cylinder body, and the exhaust holes are communicated with the valve body. The exhaust valve further comprises a piston assembly and a pressure adjusting assembly. The piston assembly movably covers the upper side of the valve body and the inner side of the cylinder body so that the inner side space of the valve body can be isolated from the inner side space of the cylinder body. The piston assembly corresponds to the exhaust hole in position. The application range of the exhaust valve can be widened, the sealing state of air in a pipeline can be kept under the specific pressure, the exhaust valve is started to exhaust air when the pressure exceeds the specific pressure, passing of water can be limited, and the exhaust valve can be used for preventing water from entering the pipeline. And meanwhile, the exhaust valve can cope with pipe network systems with different pressure requirements, and the maintenance cost and the installation cost are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of exhaust valves, and specifically relates to a constant-pressure automatic exhaust valve. Background Art

[0002] The exhaust valve is a common automatic valve for pipelines. The dynamic exhaust valve is widely used, especially in liquid medium pipelines. It is mainly used in water supply, water supply and drainage, heat, oil and gas distribution and other fields. During the operation of the pipeline system, it can automatically discharge the gas in the pipeline or other substances that affect the normal operation of the pipeline, ensuring the normal operation and service life of the pipeline. The automatic exhaust valves on the market currently include micro exhaust valves, quick exhaust valves, compound exhaust valves, etc. according to the exhaust volume. According to the internal structure, there are float type and float lever type.

[0003] The pressure of the pipe network system in the existing fire protection system varies due to different fire protection objects or requirements. In the face of pipe network systems with different pressure requirements, exhaust valves with different exhaust pressure ranges are required. Using exhaust valves with different pressure ranges will not only increase maintenance costs but also increase installation costs. Utility Model Content

[0004] In view of the deficiencies in the prior art, the purpose of the utility model is to provide a constant pressure automatic exhaust valve, which can improve the application range of the exhaust valve. The exhaust valve can cope with pipe network systems with different pressure requirements and reduce maintenance costs and installation costs.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a constant-pressure automatic exhaust valve, comprising a valve body, a float, a valve seat, a cylinder body, and a valve cover, wherein the float is arranged in the valve body, the cylinder body is fixed on the valve body through the valve seat and the cylinder body is connected to the valve body, the valve cover is arranged on the cylinder body, and an exhaust hole is opened on the periphery of the cylinder body, and the exhaust valve also includes a piston assembly and a pressure regulating assembly; the movable cover of the piston assembly is arranged on the upper side of the valve body and the inner side of the cylinder body to isolate the inner space of the valve body from the inner space of the cylinder body; the piston assembly corresponds to the position of the exhaust hole; the pressure regulating assembly is at least partially movably arranged on the inner side of the cylinder body and is crimped with the piston assembly.

[0006] Preferably, the pressure regulating assembly includes a spring, an adjusting bolt and an adjusting pressure plate; the spring and the adjusting pressure plate are both arranged inside the cylinder body, wherein the spring is pressed between the adjusting pressure plate and the piston assembly; the adjusting bolt is arranged on the valve cover and the lower part of the screw of the adjusting bolt extends into the cylinder body and is crimped with the upper end of the adjusting pressure plate.

[0007] Preferably, the adjusting bolt is threadedly connected to the valve cover.

[0008] Preferably, the size of the adjusting pressure plate is matched with the inner diameter of the cylinder body.

[0009] Preferably, the piston assembly includes a piston and a sealing assembly; the sealing assembly is fixedly arranged at the lower end of the piston; the piston is slidably arranged inside the cylinder body and the piston corresponds to the exhaust hole to close the exhaust hole; the outer periphery of the piston is in seamless contact with the inner wall of the cylinder body; the upper end of the piston is crimped with the lower end of the spring.

[0010] Preferably, an annular groove is provided in the middle of the outer circumference of the piston; the annular groove is connected to the exhaust hole.

[0011] Preferably, a connecting hole is provided on the valve seat; the sealing assembly includes a second sealing gasket and a positioning bolt; the second sealing gasket is fixed to the lower end of the piston by the positioning bolt; and the second sealing gasket cover is provided on the connecting hole to close the connecting hole.

[0012] Preferably, a top groove is provided at the upper axis of the piston; and the lower end of the spring is at least partially disposed in the top groove.

[0013] Preferably, the exhaust valve further comprises a protective cover; the protective cover is sleeved on the upper periphery of the cylinder body and the lower side of the valve cover; a plurality of ventilation holes are opened on the periphery of the protective cover.

[0014] Preferably, the valve cover is threadedly connected to the cylinder body.

[0015] Compared with the prior art, the beneficial effects of the utility model are as follows: by arranging a spring, a piston, an adjusting bolt and an adjusting pressure plate capable of adjusting the pressure in the exhaust valve, the spring is held between the piston and the adjusting pressure plate, the adjusting bolt is crimped with the adjusting pressure plate, and the length of the screw rod of the adjusting bolt located inside the cylinder body can be changed by rotating the adjusting bolt, so that the degree of compression of the spring changes accordingly, and by changing the degree of compression of the spring, the pressure required for the escape of the gas in the exhaust valve can be changed accordingly, and the sealing state of the gas in the pipeline can be maintained at a specific pressure. When the pressure exceeds the pressure, the exhaust valve starts to discharge the air and can limit the passage of water. Through such a design, the application scope of the exhaust valve is improved, and the exhaust valve can cope with pipe network systems with different pressure requirements, thereby reducing maintenance costs and installation costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the cross-sectional structure of the exhaust valve of the utility model;

[0017] Figure 2 It is a schematic diagram of the cross-sectional structure of the piston of the utility model.

[0018] In the figure: 1 valve body, 2 float, 3 first sealing gasket, 4 valve seat, 5 cylinder body, 6 spring, 7 protective cover, 8 piston, 9 valve cover, 10 adjusting bolt, 11 adjusting pressure plate, 12 second sealing gasket, 13 positioning bolt, 501 exhaust hole, 801 top groove, 802 annular groove, 803 bottom groove, 804 connecting hole. DETAILED DESCRIPTION

[0019] The following describes the specific implementation of the utility model in detail in conjunction with the accompanying drawings so that those skilled in the art can more clearly understand how to practice the utility model. Although the utility model is described in conjunction with its preferred specific embodiments, these embodiments are only illustrative, rather than limiting the scope of the utility model.

[0020] Specific embodiment 1: Please refer to Figure 1-2 A constant pressure automatic exhaust valve comprises: a valve body 1, a float 2, a first sealing gasket 3, a valve seat 4, a cylinder body 5, a spring 6, a piston 8, a valve cover 9, an adjusting bolt 10, an adjusting pressure plate 11 and a sealing assembly. The valve body 1 is a cylindrical structure with both upper and lower ends open. The size of the upper port of the valve body 1 is larger than the size of the lower port. The float 2 is arranged in the valve body 1, and the inner diameter of the float 2 is larger than the size of the lower port of the valve body 1. When in use, the lower end of the valve body 1 is connected to the pipeline, and the float 2 moves up and down with the amount of water entering the valve body 1; the cylinder body 5, the valve seat 4, and the first sealing gasket 3 are arranged in sequence from top to bottom on the upper side of the valve body 1, and the valve cover 9 is covered on the cylinder body 5 to close the upper port of the valve body 1; the adjusting pressure plate 11, the spring 6, and the piston 8 are arranged in The inner side of the cylinder body 5 is arranged in sequence from top to bottom; the adjusting bolt 10 is arranged on the valve cover 9 and the lower part of the adjusting bolt 10 at least partially extends into the cylinder body 5, and the lower end of the adjusting bolt 10 is crimped with the adjusting pressure plate 11; the valve seat 4 is a disc-shaped structure, and a connecting hole is opened at its axis. The sealing component is fixedly arranged at the lower end of the piston 8, and the sealing component cover is arranged on the valve seat 4 to close the connecting hole, so that the inner space of the valve body 1 is isolated from the inner space of the cylinder body 5; when in use, the lower end of the valve body 1 is connected to the pipeline network and the automatic exhaust valve is installed at the top of the pipeline network system. When the pipeline network system is filled with water and exhausted, it is used to accelerate the exhaust speed in the pipeline network and reduce the water filling time. At the same time, after being filled with water, it can automatically close the air outlet to ensure the normal operation and service life of the pipeline.

[0021] Specifically, the cylinder body 5 is a cylindrical structure with a connecting plate at the lower part, and an exhaust hole 501 is opened on the outer periphery of the middle part; during implementation, two exhaust holes 501 can be opened, and the two exhaust holes 501 are symmetrically distributed around the axis of the cylinder body 5; in other embodiments, the size and number of the exhaust holes 501 can also be adjusted according to the specifications of the pipeline network.

[0022] Further, for the stability of the structure, the outer edges of the piston 8 and the adjusting plate 11 are slidably connected to the inner wall of the cylinder 5, and the size of the adjusting plate 11 is adapted to the inner diameter of the cylinder 5; the position of the piston 8 corresponds to the position of the exhaust hole 501 to close the exhaust hole 501; in the initial state, the spring 6 is compressed between the adjusting plate 11 and the piston 8, and the adjusting bolt 10 is threadedly connected to the valve cover 9. By rotating the adjusting bolt 10, the length of the screw of the adjusting bolt 10 inside the cylinder 5 can be changed, so that the compression degree of the spring 6 changes accordingly. By changing the compression degree of the spring 6, the size of the pressure required for the gas in the exhaust valve to escape can be changed accordingly. It can be understood that when the adjusting bolt 10 is screwed in, the spring 6 is further compressed, and the pressure required for the gas in the exhaust valve to discharge the piston 8 to be lifted increases. When the adjusting bolt 10 is retracted, the spring 6 is further released, and the pressure required for the gas in the exhaust valve to discharge the piston 8 to be lifted decreases. By rotating the adjusting bolt 10, the applicable scope of the exhaust valve can be adjusted to cope with pipe network systems with different pressure requirements.

[0023] Furthermore, a top groove 801 is provided at the upper axis of the piston 8, and the lower end of the spring (6) is at least partially disposed in the top groove 801 to ensure the stability of the structure; an annular groove 802 is provided in the middle of the outer circumference of the piston 8, and the annular groove 802 is connected to the exhaust hole 501. When the gas in the exhaust valve wants to be discharged, the piston 8 is lifted up, and the annular groove 802 is connected to the exhaust hole 501. The arrangement can increase the gas discharge speed and ensure the safety of the pipe network system;

[0024] A bottom groove 803 is formed at the axial center of the lower end of the piston 8, and a connecting hole 804 is formed on the top wall of the bottom groove 803; the sealing assembly includes a second sealing gasket 12 and a positioning bolt 13; the second sealing gasket 12 is fixed to the lower end of the piston 8 by the positioning bolt 13, wherein the second sealing gasket 12 is disposed in the bottom groove 803, and the screw of the positioning bolt 13 is at least partially disposed in the connecting hole 804; the second sealing gasket 12 covers the connecting hole of the valve seat 4 to close the connecting hole.

[0025] In this embodiment, the valve seat 4 and the valve body 1 are threadedly connected, and the valve cover 9 and the cylinder body 5 are threadedly connected, which can facilitate the assembly and production of the exhaust valve.

[0026] The exhaust valve further comprises a protective cover 7, which is sleeved on the upper periphery of the cylinder body 5 and the lower side of the valve cover 9. The protective cover 7 mainly serves to protect the cylinder body 5. In order to facilitate exhaust, a number of regularly distributed vent holes are provided on the periphery of the protective cover 7.

[0027] Through the technical solution, a spring, a piston, an adjusting bolt and an adjusting pressure plate that can adjust the pressure are arranged in the exhaust valve, the spring is held between the piston and the adjusting pressure plate, the adjusting bolt is crimped with the adjusting pressure plate, and the length of the screw of the adjusting bolt located inside the cylinder body can be changed by rotating the adjusting bolt, so that the compression degree of the spring changes accordingly. By changing the compression degree of the spring, the pressure required for the gas in the exhaust valve to escape can be changed accordingly, and the sealing state of the gas in the pipeline can be maintained at a specific pressure. When the pressure exceeds the pressure, the exhaust valve starts to discharge air and can limit the passage of water. Through such a design, the application scope of the exhaust valve is improved, and the exhaust valve can cope with pipe network systems with different pressure requirements, reducing maintenance costs and installation costs.

[0028] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A constant pressure automatic exhaust valve, comprising a valve body (1), a float (2), a valve seat (4), a cylinder body (5), and a valve cover (9), wherein the float (2) is arranged in the valve body (1), the cylinder body (5) is fixed to the valve body (1) through the valve seat (4), and the cylinder body (5) is connected to the valve body (1), the valve cover (9) is arranged on the cylinder body (5), and an exhaust hole is opened on the outer periphery of the cylinder body (5), characterized in that: The exhaust valve further comprises a piston assembly and a pressure regulating assembly; the movable cover of the piston assembly is arranged on the upper side of the valve body (1) and the inner side of the cylinder body (5) so as to isolate the inner space of the valve body (1) from the inner space of the cylinder body (5); the position of the piston assembly corresponds to the exhaust hole; the pressure regulating assembly is at least partially movably arranged on the inner side of the cylinder body (5) and is press-connected with the piston assembly.

2. A constant pressure automatic exhaust valve according to claim 1, characterized in that: The pressure regulating assembly comprises a spring (6), an adjusting bolt (10) and an adjusting pressure plate (11); the spring (6) and the adjusting pressure plate (11) are both arranged on the inner side of the cylinder body (5), wherein the spring (6) is pressed between the adjusting pressure plate (11) and the piston assembly; the adjusting bolt (10) is arranged on the valve cover (9), and the lower part of the screw rod of the adjusting bolt (10) extends into the cylinder body (5) and is pressed against the upper end of the adjusting pressure plate (11).

3. A constant pressure automatic exhaust valve according to claim 2, characterized in that: The adjusting bolt (10) is threadedly connected to the valve cover (9).

4. A constant pressure automatic exhaust valve according to claim 2, characterized in that: The size of the regulating pressure plate (11) is adapted to the inner diameter of the cylinder body (5).

5. A constant pressure automatic exhaust valve according to claim 2, characterized in that: The piston assembly comprises a piston (8) and a sealing assembly; the sealing assembly is fixedly arranged at the lower end of the piston (8); the piston (8) is slidably arranged inside the cylinder body (5) and the piston (8) corresponds to the exhaust hole so that the exhaust hole is closed; the outer periphery of the piston (8) is in seamless contact with the inner wall of the cylinder body (5); and the upper end of the piston (8) is crimped with the lower end of the spring (6).

6. A constant pressure automatic exhaust valve according to claim 5, characterized in that: An annular groove (802) is provided in the middle of the outer circumference of the piston (8); the annular groove (802) is connected to the exhaust hole.

7. A constant pressure automatic exhaust valve according to claim 5, characterized in that: The valve seat (4) is provided with a connection hole; the sealing assembly comprises a second sealing gasket (12) and a positioning bolt (13); the second sealing gasket (12) is fixed to the lower end of the piston (8) by the positioning bolt (13); the second sealing gasket (12) is covered on the connection hole to close the connection hole.

8. A constant pressure automatic exhaust valve according to claim 5, characterized in that: A top groove (801) is provided at the upper axis of the piston (8); and at least a portion of the lower end of the spring (6) is disposed in the top groove (801).

9. A constant pressure automatic exhaust valve according to claim 1, characterized in that: The exhaust valve further comprises a protective cover (7); the protective cover (7) is sleeved on the upper outer periphery of the cylinder body (5) and the lower side of the valve cover (9); and a plurality of ventilation holes are formed on the outer periphery of the protective cover (7).

10. A constant pressure automatic exhaust valve according to claim 1, characterized in that: The valve cover (9) is threadedly connected to the cylinder body (5).

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