Gas source pressure relief device

Abstract

The utility model relates to the technical field of valves, and discloses an air source pressure relief device which comprises an air path block, an air source hole, an exhaust hole and a pilot air hole are formed in the air path block, a valve shell is installed on the air path block, a valve element is connected to the valve shell, a membrane is installed on the valve element, a through hole and a second passing hole are formed in the valve element, and the second passing hole is communicated with the through hole. A valve seat is installed on the valve shell, and a sealing gasket is arranged on the valve seat. A first passing hole is formed in the valve shell. By arranging the valve seat, the valve element, the valve shell and the diaphragm and externally connecting pilot gas, pressure relief of a gas source is achieved, the whole structure is compact and simple, the size is small, the valve is directly integrated in a gas path block for use, the adaptability is high, cost is low, and application is wide; through the movably arranged valve seat, the technical effect of flexibly adjusting the pressure relief range is achieved, operation is easy, and reliability is high.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to an air source pressure relief device. Background Art

[0002] Pressure relief valves are essential components of hydraulic and pneumatic systems, primarily used to control and maintain system pressure within a safe range. Excessive pressure in hydraulic and pneumatic systems can cause equipment damage, pipeline ruptures, or other safety hazards. The design principle of a pressure relief valve is based on a combination of a spring and a valve core. Its core function is to automatically open when the hydraulic system pressure reaches a set value, releasing excess pressure and maintaining system stability. In practical applications, ordinary reversing valves are also temporarily used as pressure relief valves. Pressure relief valves are widely used not only in hydraulic and pneumatic systems but also in other industrial fields requiring pressure control. With the advancement of industrial automation and mechanization, pressure relief valves have become an indispensable component of modern hydraulic and pneumatic systems. However, existing pressure relief valves mostly use springs to regulate pressure, resulting in low adjustment accuracy. Their complex structure and large size make them difficult to adapt to different hydraulic and pneumatic systems. Utility Model Content

[0003] The purpose of the utility model is to provide an air source pressure relief device to solve the problems of existing pressure relief devices such as large size, complex structure, difficult adaptation, and low adjustment accuracy.

[0004] The utility model is realized by the following technical solutions: an air source pressure relief device comprises an air circuit block, an air source hole and an exhaust hole are arranged radially on the air circuit block, a pilot air hole is arranged axially, a stepped inner hole is arranged on the air circuit block, a valve housing is mounted on the stepped inner hole, a valve core is slidably connected to the valve housing, a diaphragm is mounted on the valve core, a through hole is arranged along the axis of the valve core, a second path hole is arranged radially, the second path hole is communicated with the through hole; a valve seat is mounted on the valve housing, A sealing gasket is provided on the valve seat; a first path hole is provided on the valve housing; the air path block, valve seat, valve core and valve housing constitute an air source cavity; the air path block, valve core, valve housing and diaphragm constitute a pressure relief cavity; the air path block and diaphragm constitute a pilot air cavity; the air source hole and the first path hole are in the air source cavity; the exhaust hole and the second path hole are in the pressure relief cavity; the pilot air hole is in the pilot air cavity; the air source cavity and the pressure relief cavity are connected through a through hole on the valve core; the diaphragm is used to control the opening and closing of the second path hole.

[0005] In order to better implement the present invention, further, the diaphragm is threadedly connected to the valve core.

[0006] In order to better realize the present invention, further, the valve seat is movably connected to the valve housing, and the valve seat can move along the axial direction of the valve housing to adjust the distance between the sealing gasket and the valve core.

[0007] In order to better implement the present invention, further, the valve seat is threadedly connected to the valve housing, and a hexagonal hole is provided on the valve seat, and the hexagonal hole is provided on the opposite side of the sealing gasket.

[0008] In order to better implement the present invention, further, a second sealing ring is provided between the valve housing and the gas circuit block, and a first sealing ring is provided between the valve core and the valve housing.

[0009] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0010] (1) The utility model realizes pressure relief regulation of the gas source by setting a valve seat, a valve core, a valve housing, a diaphragm, and an external pilot gas, and utilizing the pilot gas with precise and stable air pressure. It has high precision, a compact and simple overall structure, and a small size. It can be directly integrated into the gas circuit block for use, has high adaptability, low cost, and is widely used.

[0011] (2) The utility model realizes the technical effect of flexibly adjusting the pressure relief range through the movable valve seat, which is simple to operate and highly reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a cross-sectional view of the overall structure of the utility model.

[0013] Among them: 1-air path block; 2-valve seat; 3-sealing gasket; 4-valve core; 5-valve housing; 6-diaphragm; 7-air source hole; 8-exhaust hole; 9-pilot air hole; 10-second path hole; 11-second sealing ring; 12-first sealing ring; 13-first path hole. DETAILED DESCRIPTION

[0014] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0015] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0016] Example 1:

[0017] This embodiment provides a gas source pressure relief device, specifically Figure 1 As shown, it includes an air circuit block 1, which consists of a lower body and an upper cover. The air circuit block 1 is provided with an air source hole 7 and an exhaust hole 8 in the radial direction, and a pilot air hole 9 in the axial direction. The air source hole 7 is on the lower body, the pilot air hole 9 is on the upper cover, and the exhaust hole 8 is at the connection between the upper cover and the lower body. The air circuit block 1 is provided with a stepped inner hole, and the air source hole 7, the exhaust hole 8, and the pilot air hole 9 are all connected to the stepped inner hole. A valve housing 5 is installed on the stepped inner hole, and a valve core 4 is slidably connected to the valve housing 5. The stepped inner hole is used to limit the valve housing 5. A diaphragm 6 is installed on the valve core 4. A through hole is provided on the valve core 4 along the axis, and a second path hole 10 is provided in the radial direction. The second path hole 10 is connected to the through hole; a valve seat 2 is installed on the valve housing 5, and a sealing gasket 3 is provided on the valve seat 2; the valve housing 5 A first path hole 13 is provided on it; the air circuit block 1, the valve seat 2, the valve core 4, and the valve housing 5 constitute an air source cavity, the air circuit block 1, the valve core 4, the valve housing 5, and the diaphragm 6 constitute a pressure relief cavity, the air circuit block 1 and the diaphragm 6 constitute a pilot air cavity, the air source hole 7 and the first path hole 13 are in the air source cavity, the exhaust hole 8 and the second path hole 10 are in the pressure relief cavity, the pilot air hole 9 is in the pilot air cavity, and the air source cavity and the pressure relief cavity are connected through the through hole on the valve core 4; the diaphragm 6 is used to control the opening and closing of the second path hole 10.

[0018] When the air source is connected, the air flows into the air source cavity from the air source hole 7, and in the air source cavity, the air flows from the air path block 1 through the first path hole 13 into the valve housing 5, and then passes through the through hole and the second path hole 10 on the valve core 4 into the pressure relief cavity, and then is discharged from the exhaust hole 8. During this process, the air pressure in the air source cavity and the pressure relief cavity is the same; and the pilot air flows steadily into the pilot air cavity through the pilot air hole 9 to ensure the pressure stability of the pilot air cavity; the diaphragm 6 remains stable under the joint action of the pressure relief cavity and the pilot air cavity. During this period, if the air source pressure increases, the air pressure in the pressure relief chamber will be greater than that in the pilot air chamber. At this time, the diaphragm 6 moves upward under the action of the air pressure, so that the second path hole 10 opens or increases its opening. At this time, part of the air flow will be discharged from the second path hole 10, and the air pressure in the air source chamber will be maintained stable by pressure relief. If the air source pressure decreases, the diaphragm 6 starts to move downward, so that the opening of the second path hole 10 becomes smaller, until the valve core 4 contacts the sealing gasket 3. At this time, the air source chamber and the pressure relief chamber are no longer connected, thereby ensuring the stability of the pressure in the air source chamber.

[0019] However, the pressure in the gas source chamber is typically slightly higher, so this device is primarily used to relieve pressure on the gas source. By adjusting the pressure of the pilot gas supplied through the pilot air port 9, the source pressure can be controlled. The valve housing 5 is compact and adaptable to a variety of gas path blocks 1.

[0020] Example 2:

[0021] This embodiment is further expanded on the basis of the above embodiment. Figure 1 As shown, the diaphragm 6 is threadedly connected to the valve core 4 .

[0022] The stability and quick disassembly of the threaded connection facilitate the subsequent disassembly and assembly of the diaphragm 6 for maintenance and repair.

[0023] The other parts of this embodiment are the same as those of the above embodiment and will not be described in detail.

[0024] Example 3:

[0025] This embodiment is further expanded on the basis of the above embodiment. Figure 1 As shown, the valve seat 2 is movably connected to the valve housing 5 , and the valve seat 2 can move along the axial direction of the valve housing 5 to adjust the distance between the sealing gasket 3 and the valve core 4 .

[0026] By changing the distance between the sealing gasket 3 and the valve core 4, the movement stroke of the diaphragm 6 is adjusted, thereby changing the pressure relief capacity of the pressure relief chamber.

[0027] The other parts of this embodiment are the same as those of the above embodiment and will not be described in detail.

[0028] Example 4:

[0029] This embodiment is further expanded on the basis of the above embodiment. Figure 1 As shown, the valve seat 2 is threadedly connected to the valve housing 5 , and a hexagonal hole is provided on the valve seat 2 , and the hexagonal hole is provided on the opposite side of the sealing gasket 3 .

[0030] When adjusting the position of the valve seat 2, open the upper cover of the gas path block 1, take out the valve housing 5, and then use a tool to twist the hexagon socket on the valve seat 2. At this time, the valve seat 2 will rotate toward the valve housing 5, thereby adjusting the distance between the sealing gasket 3 and the valve core 4. After the adjustment is completed, the self-locking property of the threaded connection is used to ensure that the position of the valve seat 2 will not change. The adjustment is fast and the operation is simple.

[0031] The other parts of this embodiment are the same as those of the above embodiment and will not be described in detail.

[0032] Example 5:

[0033] This embodiment is further expanded on the basis of the above embodiment. Figure 1 As shown, a second sealing ring 11 is provided between the valve housing 5 and the gas circuit block 1 , and a first sealing ring 12 is provided between the valve core 4 and the valve housing 5 .

[0034] The first path hole 13 of the standard part and the valve core 4 of the gas path block 1 are used to improve the air tightness of the gas source cavity and the output cavity, prevent the uncontrolled mutual flow and leakage of gas in the two cavities, and improve the stability and reliability of the device operation.

[0035] The other parts of this embodiment are the same as those of the above embodiment and will not be described in detail.

[0036] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Any simple modification or equivalent change made to the above embodiment based on the technical essence of the present invention shall fall within the scope of protection of the present invention.

Claims

1. A gas source pressure relief device, characterized in that: The invention comprises an air circuit block (1), wherein the air circuit block (1) is provided with an air source hole (7) and an exhaust hole (8) in the radial direction, and a pilot air hole (9) in the axial direction, the air circuit block (1) is provided with a stepped inner hole, a valve housing (5) is mounted on the stepped inner hole, a valve core (4) is slidably connected to the valve housing (5), a diaphragm (6) is mounted on the valve core (4), a through hole is provided on the valve core (4) along the axis, and a second path hole (10) is provided in the radial direction, the second path hole (10) being connected to the through hole; a valve seat (2) is mounted on the valve housing (5), and a sealing gasket (3) is provided on the valve seat (2); and a first path hole (13) is provided on the valve housing (5); The air circuit block (1), the valve seat (2), the valve core (4), and the valve housing (5) form an air source cavity; the air circuit block (1), the valve core (4), the valve housing (5), and the diaphragm (6) form a pressure relief cavity; the air circuit block (1) and the diaphragm (6) form a pilot air cavity; the air source hole (7) and the first path hole (13) are located in the air source cavity; the exhaust hole (8) and the second path hole (10) are located in the pressure relief cavity; the pilot air hole (9) is located in the pilot air cavity; the air source cavity and the pressure relief cavity are connected via a through hole on the valve core (4); and the diaphragm (6) is used to control the opening and closing of the second path hole (10).

2. The air source pressure relief device according to claim 1, characterized in that: The diaphragm (6) is threadedly connected to the valve core (4).

3. The air source pressure relief device according to claim 1, characterized in that: The valve seat (2) is movably connected to the valve housing (5), and the valve seat (2) can move along the axial direction of the valve housing (5) to adjust the distance between the sealing gasket (3) and the valve core (4).

4. The air source pressure relief device according to claim 3, characterized in that: The valve seat (2) is threadedly connected to the valve housing (5), and a hexagonal hole is provided on the valve seat (2), and the hexagonal hole is provided on the opposite surface of the sealing gasket (3).

5. The air source pressure relief device according to claim 1, characterized in that: A second sealing ring (11) is provided between the valve housing (5) and the gas circuit block (1), and a first sealing ring (12) is provided between the valve core (4) and the valve housing (5).

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