A breather valve with online adjustable discharge pressure

Abstract

This utility model relates to a breather valve with online adjustable discharge pressure, belonging to the field of valves. It includes a valve body and a valve disc. The valve body has an inlet, an exhalation outlet, and an inhalation outlet. The valve disc consists of an exhalation valve disc and an inhalation valve disc. The exhalation outlet has an exhalation valve seat that cooperates with the exhalation valve disc, and the inhalation outlet has an inhalation valve seat that cooperates with the inhalation valve disc. The inlet has a flange for connection to a pressure vessel. Its key feature is that the exhalation valve disc consists of a diaphragm sealing gasket and a water injection chamber. The diaphragm sealing gasket is sealed on the lower end face of the water injection chamber and cooperates with the sealing surface of the exhalation valve seat to form an exhalation sealing pair. A water injection pipe is provided on the upper end face of the water injection chamber, and water is injected into the inner cavity of the water injection chamber. A guide device is provided between the outer circumference of the water injection chamber and the valve body. By controlling the amount of water injected into the water injection chamber, the exhalation pressure can be set and adjusted, offering advantages such as accurate exhalation pressure setting and high online exhalation pressure adjustment precision.

Description

Technical Field

[0001] This utility model belongs to the field of valves, and in particular relates to a breather valve. Background Technology

[0002] Breathing valves are commonly used on pressure vessels to balance the internal pressure and prevent overpressure or negative pressure from causing safety accidents. A typical breathing valve includes a valve body and a valve disc. The valve body is fixedly installed on the pressure vessel, and its valve chamber communicates with the vessel's internal cavity. The valve chamber contains an exhalation valve seat and an inhalation valve seat. The valve disc includes an exhalation valve disc and an inhalation valve disc, which respectively cooperate with the exhalation and inhalation valve seats to form an exhalation sealing pair and an inhalation sealing pair. When the internal pressure of the pressure vessel exceeds the positive pressure setting pressure, the positive pressure pushes the exhalation valve disc to open the exhalation sealing pair, releasing the pressure and preventing overpressure accidents. When the internal pressure of the pressure vessel exceeds the negative pressure setting pressure, the negative pressure draws in the inhalation valve disc to open the inhalation sealing pair, allowing external gas to replenish the pressure inside the pressure vessel and preventing negative pressure from damaging the pressure vessel. However, the main problem with existing breathing valves is that the positive pressure setting pressure is generally set by the gravity loading spring force of the valve disc. Under different temperature conditions, thermal expansion and contraction cause changes in the spring force, making the positive pressure setting pressure unstable. Moreover, the accuracy of adjusting the spring compression force on site is very low, resulting in low accuracy of the opening pressure setting and adjustment of existing breathing valves. Utility Model Content

[0003] This invention addresses the problems existing in the prior art by providing a breathing valve that uses water injection into the inner cavity of the exhalation valve disc to set and adjust the exhalation pressure using the weight of the injected water. This valve allows for accurate setting of the exhalation pressure value, high online adjustment accuracy of the exhalation pressure, and online adjustment of the discharge pressure.

[0004] The technical solution for realizing this utility model is as follows:

[0005] A breather valve with online adjustable discharge pressure includes a valve body and a valve disc. The valve body has an inlet, an outlet, and an inlet. The valve disc consists of an outlet valve disc and an inlet valve disc. The outlet is provided with an outlet valve seat that cooperates with the outlet valve disc, and the inlet is provided with an inlet valve seat that cooperates with the inlet valve disc. The inlet is provided with a flange that connects to a pressure vessel. The breather valve disc is characterized by being composed of a diaphragm gasket and a water injection chamber. The diaphragm gasket is sealed on the lower end face of the water injection chamber and cooperates with the sealing surface of the outlet valve seat to form a breather sealing pair. A water injection pipe is provided on the upper end face of the water injection chamber, and water is injected into the inner cavity of the water injection chamber. A guide device is provided between the outer circumference of the water injection chamber and the valve body.

[0006] The preferred embodiment is that the suction valve seat is disposed in the valve cavity between the inlet and the outlet, and its centerline coincides with the centerline of the exhalation valve seat; a concentric axial guide hole is provided below the sealing surface of the suction valve seat, and a guide rod that movably cooperates with the axial guide hole is provided at the center of the lower end face of the suction valve disc.

[0007] A preferred embodiment is that the guiding device consists of a guide post set on an annular platform on the outer periphery of the valve body's outlet and a guide hole set in the radial annular shoulder on the outer circumference of the water injection chamber. The guide post is evenly arranged along the circumferential direction of the annular platform, and the guide hole is set at the corresponding position of the guide post along the circumferential direction of the radial annular shoulder.

[0008] A preferred embodiment is to install a guide frame between the water injection pipe and the annular platform of the valve body. The guide frame is fixedly installed on the annular platform within the annular surface by a screw, and its upper plane has a guide hole at the center that dynamically mates with the outer cylindrical surface of the water injection pipe.

[0009] The preferred embodiment is to install a water level regulating valve and a viewing mirror with an indicator on the side wall of the water injection chamber, with the water level regulating valve located near the horizontal plane of the annular platform.

[0010] Compared with the prior art, the advantages of this utility model are: the exhalation valve is composed of a diaphragm sealing gasket and a water injection chamber. By controlling the amount of water injected into the water injection chamber, the exhalation pressure can be set and adjusted. It has the advantages of accurate exhalation pressure setting value and high online adjustment accuracy of exhalation pressure. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of this utility model.

[0012] Figure 2 This is a schematic diagram of the structure of this utility model in the exhalation state.

[0013] Figure 3 This is a schematic diagram of the structure of this utility model in the air intake state.

[0014] In the diagram: 1 Valve body, 2 Valve chamber, 3 Suction valve seat, 4 Suction valve disc, 5 Exit valve seat, 6 Diaphragm gasket, 7 Water injection chamber, 8 Lens, 9 Water injection pipe, 10 Guide frame, 11 Screw, 12 Water, 13 Water level regulating valve, 14 Guide column, 15 Radial annular shoulder, 16 Annular platform, 17 Guide rod, 18 Axial guide hole, 19 Inlet, 20 Flange. Detailed Implementation

[0015] like Figure 1The breather valve shown is capable of online adjustment of discharge pressure. It includes a valve body 1 and a valve disc. The valve body 1 has an inlet 19, an outlet, and an inlet. The valve disc consists of an exhalation valve disc and an inlet valve disc 4. The outlet is provided with an exhalation valve seat 5 that cooperates with the exhalation valve disc, and the inlet is provided with an inlet valve seat 3 that cooperates with the inlet valve disc 4. The inlet 19 is provided with a flange 20 for connection to a pressure vessel. The inlet 19 and the pressure vessel can also be connected by threads or welding. Its characteristic feature is that the exhalation valve disc consists of a diaphragm sealing gasket 6 and a water injection chamber 7. The diaphragm sealing gasket 6 is sealed and positioned on the lower end face of the water injection chamber 7, cooperating with the sealing surface of the exhalation valve seat 5. The water injection chamber 7 has a water injection pipe 9 on its upper end face. Water 12 is injected into the inner cavity of the water injection chamber 7 through the water injection pipe 9. The diaphragm sealing gasket 6 is made of polytetrafluoroethylene propylene material with excellent chemical inertness and resistance to high and low temperatures, forming a flexible air sealing pair structure with the exhalation valve seat 5. The gravity of the water 12 in the inner cavity of the water injection chamber 7 can be used to flexibly deform the diaphragm sealing gasket 6 and press it tightly against the exhalation valve seat 5 to seal, improving the sealing performance of the air sealing pair. A guide device is set between the outer circumference of the water injection chamber 7 and the valve body 1. This guide device limits the up and down movement of the exhalation valve disc in the direction of the center line of the exhalation valve seat 5. By controlling the amount of water in the inner cavity of the water injection chamber 7, an exhalation pressure value is set. When the air pressure in the pressure vessel exceeds the exhalation pressure value, the air pressure pushes the exhalation valve disc to open and release the pressure in the pressure vessel, preventing overpressure in the pressure vessel. Figure 2 As shown, its expiratory pressure is accurate, stable, and highly adjustable; when the negative pressure inside the pressure vessel exceeds the set value, the negative pressure actuation valve 4 opens, drawing outside air into the pressure vessel to prevent damage from negative pressure. Figure 3 As shown.

[0016] The suction valve seat 3 is disposed in the valve cavity 2 between the inlet 19 of the valve body 1 and the outlet, and its center line coincides with the center line of the exhalation valve seat 5, that is, the suction valve seat 3 and the exhalation valve seat 5 are concentrically arranged. There is an annular flow channel between the suction valve seat 3 and the inner wall of the valve cavity 2. The inlet 19 is connected to the inlet side of the exhalation valve seat 5 and the suction valve seat 3 through the annular flow channel. An axial guide hole 18 is concentrically arranged below the sealing surface of the suction valve seat 3. A guide rod 17 is arranged at the center of the lower end face of the suction valve disc 4, which is movably matched with the axial guide hole 18. The axial lifting and lowering movement of the suction valve disc 4 is limited by the guiding effect between the guide rod 17 and the axial guide hole 18.

[0017] The guiding device is composed of a guide post 14 on the valve body 1 and a guide hole on the water injection chamber 7. The guide post 14 is evenly arranged along the circumferential direction of the annular platform 16 on the outer periphery of the valve body 1. The guide hole is evenly arranged along the circumferential direction of the radial annular shoulder 15 on the outer periphery of the water injection chamber 7. The guide hole and the guide post 14 are positioned correspondingly, limiting the movement of the exhalation valve disc along the axial direction of the guide post 14. Alternatively, the guiding device can be composed of a guide ring on the outer periphery of the exhalation valve disc and a guide cylinder on the valve body 1 to form a piston-type guiding mechanism.

[0018] A guide frame 10 is provided between the water injection pipe 9 and the annular platform 16 of the valve body 1. The guide frame 10 is fixedly installed on the annular surface of the annular platform 16 by a screw 11. The center of its upper plane is provided with a guide hole that dynamically matches the outer cylindrical surface of the water injection pipe 9, thereby improving the axial movement stability of the valve disc.

[0019] A water level regulating valve 13 and a viewing mirror 8 with an indicator are installed on the side wall of the water injection chamber 7. The water level regulating valve 13 is located near the upper plane of the annular platform 16. The water volume in the inner cavity of the exhalation valve is controlled by the water injection pipe 9 and the water level regulating valve 13. The water volume can be adjusted on-site by the water level regulating valve 13. The water volume control and adjustment are convenient and accurate. The exhalation pressure setting accuracy is high. By adjusting the exhalation pressure setting value, it is suitable for working conditions with different pressures.

Claims

1. A breathing valve with adjustable discharge pressure in line, comprising a valve body (1) with an inlet (19), an outlet and an inlet, a valve flap consisting of an outlet valve flap and an inlet valve flap (4), the outlet is provided with an outlet valve seat (5) cooperating with the outlet valve flap, the inlet is provided with an inlet valve seat (3) cooperating with the inlet valve flap (4), the inlet (19) is provided with a flange (20) for connection to a pressure vessel, characterized in that: The call valve is composed of a diaphragm sealing gasket (6) and a water injection chamber (7). The diaphragm sealing gasket (6) is sealed on the lower end face of the water injection chamber (7) and cooperates with the sealing surface of the call valve seat (5) to form a call sealing pair. The upper end face of the water injection chamber (7) is provided with a water injection pipe (9). Water (12) is injected into the inner cavity of the water injection chamber (7). The water (12) is injected into the inner cavity of the water injection chamber (7) through the water injection pipe (9). A guide device is provided between the outer circumference of the water injection chamber (7) and the valve body (1).

2. The breather valve with online adjustable discharge pressure according to claim 1, characterized in that: The suction valve seat (3) is located in the valve cavity (2) between the inlet (19) and the outlet, and its center line coincides with the center line of the outlet valve seat (5); an axial guide hole (18) is concentrically provided below the sealing surface of the suction valve seat (3), and a guide rod (17) that is movably engaged with the axial guide hole (18) is provided at the center of the lower end face of the suction valve disc (4).

3. The breather valve with online adjustable discharge pressure according to claim 2, characterized in that: The guiding device is composed of a guide post (14) on the valve body (1) and a guide hole on the water injection cavity (7). The guide post (14) is evenly arranged along the circumferential direction of the annular platform (16) on the outer periphery of the valve body (1). The guide hole is evenly arranged along the circumferential direction of the radial annular shoulder (15) on the outer periphery of the water injection cavity (7). The guide hole and the guide post (14) are in corresponding positions.

4. The breather valve with online adjustable discharge pressure according to claim 3, characterized in that: A guide frame (10) is provided between the water injection pipe (9) and the annular platform (16) of the valve body (1). The guide frame (10) is fixedly installed on the annular surface of the annular platform (16) by a screw (11), and a guide hole is provided at the center of its upper plane to dynamically cooperate with the outer cylindrical surface of the water injection pipe (9).

5. The breather valve with online adjustable discharge pressure according to claim 1, 2, 3, or 4, characterized in that: in The side wall of the water injection chamber (7) is equipped with a water level regulating valve (13) and a viewing mirror (8) with an indicator. The water level regulating valve (13) is located near the upper plane of the annular platform (16).

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