Sucker type safety valve

Abstract

The invention belongs to the field of safety valves, and particularly relates to a sucker type safety valve which aims to solve the problems of poor stability and low sensitivity of exhaust action in the prior art. The sucker type safety valve comprises a valve body and a first sucker, an exhaust port is formed in the top of the valve body, an air inlet is formed in the bottom of the valve body, a groove face is arranged in the first sucker, and the first sucker is arranged in the valve body; the first suction cup can cover the exhaust port, a plurality of exhaust grooves are formed in the edge of the inner wall of the top of the valve body, when the groove faces extend into the exhaust grooves, the valve body starts the exhaust action, the high-elasticity suction cup is matched with a special structure, the suction cups are expanded and contracted through the pressure effect, and the exhaust and sealing states are formed. The exhaust valve has the advantages of good exhaust action stability and high opening and closing sensitivity.

Description

Technical Field

[0001] The invention belongs to the field of safety valves, and in particular relates to a suction cup type safety valve. Background Art

[0002] Safety valves play an indispensable role in protecting system safety and the safe operation of internal equipment in sealed piping systems. Spring-loaded safety valves are more common in industrial applications.

[0003] The safety valve can be installed in the pneumatic or hydraulic system to protect the safety of closed system equipment or pipelines. The safety valve can open and close automatically according to the working pressure of the system. When the system pressure is higher than the opening pressure of the pressure relief safety valve, the pressure relief safety valve opens to release the pressure in the system. When the pressure in the system drops to the return pressure of the pressure relief safety valve, the pressure relief safety valve closes.

[0004] However, the existing safety valve has the problems of poor exhaust action stability and low sensitivity. Summary of the invention

[0005] In order to solve the problems of poor exhaust action stability and low sensitivity in the prior art, the present invention provides a suction cup type safety valve, comprising:

[0006] The valve body has an exhaust port at the top and an air inlet at the bottom;

[0007] a first suction cup, wherein a groove surface is provided inside the first suction cup, the first suction cup is arranged in the valve body, and the first suction cup can cover the exhaust port;

[0008] Wherein, a plurality of exhaust grooves are arranged at the edge of the inner wall at the top of the valve body, and when the groove surface extends to the exhaust grooves, the valve body starts the exhaust action.

[0009] According to a suction cup type safety valve provided in some embodiments of the present application, a polished metal plane is provided on the top inner wall of the valve body.

[0010] According to some embodiments of the present application, a suction cup type safety valve is provided, wherein a sealing surface and a groove surface are provided on a side of the first suction cup facing the exhaust port, the sealing surface contacts the polished metal plane to form a sealing boundary, and a piston chamber is provided on a side of the first suction cup facing away from the exhaust port.

[0011] According to a suction cup type safety valve provided in some embodiments of the present application, the inner wall of the air inlet is provided with a pressure setting thread.

[0012] According to some embodiments of the present application, a suction cup type safety valve is provided, which also includes a push rod, a top cap is provided at one end of the push rod, and the top cap extends into the piston chamber. A space is reserved in the piston chamber to enable the first suction cup to move along the axial direction. A fork nut is provided at the other end of the push rod, and the thread of the outer wall of the fork nut is adapted to the pressure setting thread.

[0013] According to a suction cup type safety valve provided in some embodiments of the present application, a hexagonal blind hole is provided on the outside of the fork-mouth nut.

[0014] According to a suction cup type safety valve provided in some embodiments of the present application, the inner diameter of the exhaust groove is larger than the outer diameter of the polished metal plane initially contacted by the first suction cup, the groove surface is arranged in the sealing surface, and the groove surface is provided with a plurality of strip-shaped protrusions pointing to the center of the first suction cup.

[0015] According to a suction cup type safety valve provided in some embodiments of the present application, the valve body is an integrated closed workpiece, and the initial outer diameter of the first suction cup is smaller than the inner diameter of the air inlet.

[0016] A suction cup safety valve provided according to some embodiments of the present application also includes a dustproof net, which covers the exhaust port.

[0017] According to some embodiments of the present application, a suction cup type safety valve is provided, which also includes a second suction cup, and the second suction cup is arranged outside the exhaust port.

[0018] Beneficial effects of the present invention:

[0019] A metal plane is arranged around the exhaust port in the valve body, and the seal and the exhaust component are integrated into one by utilizing the phenomenon that the outer diameter expands when the first suction cup is pressurized. It has the advantages of simple structure, convenient processing, low cost, small size, good exhaust action stability and high opening and closing sensitivity.

[0020] At normal pressure, the fork nut drives the push rod to push the suction cup upward, so that the disc surface is in good contact with the metal plane, forming the initial sealing condition. When the exhaust pressure is not reached, the back of the suction cup is compressed by the internal and external pressure difference, and the sealing surface of the suction cup will gradually adhere closely to the metal plane to maintain the sealing state.

[0021] When overpressure occurs, the pressure inside the valve presses the first suction cup upward, and the sealing surface of the first suction cup expands outward. The edge of the groove surface close to the sealing surface exceeds the inner diameter of the exhaust groove, destroying the sealing boundary between the suction cup and the metal plane, and releasing the pressure through the exhaust groove. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Other features, objects and advantages of the present application will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings:

[0023] Figure 1 It is a schematic diagram of the external structure of some embodiments of the present application;

[0024] Figure 2 It is a schematic diagram of the internal structure of some embodiments of the present application;

[0025] Figure 3 are cross-sectional views of some embodiments of the present application;

[0026] Figure 4 is a schematic structural diagram of a first suction cup in some embodiments of the present application;

[0027] Figure 5 It is a cross-sectional view of some other embodiments of the present application.

[0028] In the figure: 10, valve body; 11, exhaust port; 12, metal plane; 13, exhaust groove; 14, dust screen; 15, air inlet; 16, pressure setting thread; 20, first suction cup; 21, groove surface; 22, sealing surface; 23, piston chamber; 30, push rod; 31, top cap; 32, fork nut; 33, hexagonal blind hole; 50, second suction cup. DETAILED DESCRIPTION

[0029] The present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the relevant invention, rather than to limit the invention. It is also necessary to explain that, for ease of description, only the parts related to the relevant invention are shown in the accompanying drawings.

[0030] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0031] like Figure 1-5 As shown, the present invention provides a suction cup type safety valve, comprising a valve body 10 and a first suction cup 20, wherein the valve body 10 is provided with an exhaust port 11 at the top and an air inlet 15 at the bottom, and the first suction cup 20 is provided with a groove surface 21 inside. The first suction cup 20 is arranged in the valve body 10, and the first suction cup 20 can cover the exhaust port 11;

[0032] Among them, a polished metal plane 12 is provided on the inner wall of the top of the valve body 10, and the polished metal plane 12 can be arranged in a ring shape. When the top of the inner wall of the valve body 10 is a polished metal plane, the first suction cup 20 can be better adsorbed on its surface to ensure stability during use. A plurality of exhaust grooves 13 are provided at the edge of the inner wall of the top of the valve body 10. When the groove surface 21 extends into the exhaust groove 13, the valve body 10 starts the exhaust action.

[0033] In specific implementation, a cavity is provided inside the valve body 10, and an exhaust port 11 and an air inlet 15 connected to the cavity are respectively provided on the top and bottom. Preferably, the aperture of the air inlet 15 is larger than the exhaust port 11, and an exhaust groove 13 is provided near the edge of the top wall of the internal cavity of the valve body 10, and a relatively narrow groove width is provided. A plurality of exhaust grooves 13 can be provided and distributed in a circle with the exhaust port 11 as the center. In some embodiments, the longitudinal section of the exhaust groove 13 is a right triangle, and the depth of the opening gradually deepens from the inside to the outside. The first suction cup 20 is made of a highly elastic material, and a groove surface 21 is provided on the side of the first suction cup 20 facing the exhaust port 11.

[0034] Under normal pressure, the first suction cup 20 is adsorbed on the exhaust port 11 to form an initial sealing condition; when the exhaust pressure is not reached, the back of the suction cup is compressed by the pressure difference between the inside and the outside, and the first suction cup will gradually and tightly adhere to the top of the internal cavity of the valve body, covering and sealing the exhaust port 11 and maintaining a sealed state.

[0035] When overpressure occurs, the pressure inside the valve presses the first suction cup 20 upward, and the first suction cup 20 gradually expands outward. The edge of the groove surface 21 of the first suction cup 20 close to the sealing surface 22 exceeds the inner diameter of the exhaust groove 13, which can destroy the sealing boundary between the first suction cup 20 and the top inner wall of the valve body 10, thereby releasing pressure and making the exhaust action more stable.

[0036] In some embodiments, a sealing surface 22 and a groove surface 21 are provided on the side of the first suction cup 20 facing the exhaust port 11 , the sealing surface 22 contacts the polished metal plane 12 to form a sealing boundary, and a piston chamber 23 is provided on the side of the first suction cup 20 facing away from the exhaust port 11 .

[0037] During specific implementation, the side of the first suction cup 20 facing the exhaust port 11 is a concave curved surface, the sealing surface 22 is arranged on the outside, and the groove surface 21 is arranged on the inside. Under normal pressure, the sealing surface 22 fits with the polished metal plane 12, and the first suction cup 20 maintains an adsorbed state. When overpressure occurs, the first suction cup 20 expands outward, and the groove surface 21 gradually approaches the exhaust groove 13. When the edge of the groove surface 21 close to the sealing surface 22 exceeds the inner diameter of the exhaust groove, pressure is discharged. After the pressure drops to the set pressure, the first suction cup 20 contracts, and the safety valve returns to a sealed state.

[0038] In specific implementation, when the pressure in the system gradually increases, the internal and external pressure difference increases, the upward extrusion force on the first suction cup 20 increases, the suction cup surface deforms, the gap volume between the first suction cup 20 and the polished metal plane 12 becomes smaller and smaller, the contact area between the sealing surface 22 and the polished metal plane 12 gradually increases, and the concave surface of the suction cup tends to be flat. When the edge of the groove surface 21 close to the sealing surface 22 contacts the inner diameter of the exhaust groove 13, the exhaust action starts. After the pressure drops to the set pressure, the suction cup shrinks and the safety valve returns to the sealed state.

[0039] In some embodiments, the inner wall of the air inlet 15 is provided with a pressure setting thread 16 .

[0040] In a specific implementation, a pressure setting thread 16 is provided at the air inlet 15 for fixing a component capable of determining an initial adsorption position of the first suction cup 20 .

[0041] In some embodiments, a push rod 30 is also included, and a top cap 31 is provided at one end of the push rod 30. The top cap 31 extends into the piston chamber 23. A space is reserved in the piston chamber 23 to enable the first suction cup 20 to move along the axial direction. A fork nut 32 is provided at the other end of the push rod 30. The thread on the outer wall of the fork nut 32 is adapted to the pressure setting thread 16.

[0042] During specific implementation, the push rod 30 is threadedly connected to the pressure setting thread 16 through the fork nut 32, and the top cap 31 at the other end of the push rod 30 is embedded in the piston chamber 23 on the back of the first suction cup 20. The push rod 30 is adjusted to an appropriate position by rotating the fork nut 32. The diameter of the top cap 31 is slightly smaller than the inner diameter of the piston chamber 23, and the height of the top cap 31 is smaller than the height of the piston chamber 23, so that a certain space is left in the piston chamber 23, so that the first suction cup 20 can move and reset within a certain range when it is subjected to pressure or when the pressure is discharged. The initial sealing position of the first suction cup 20 can be determined by the push rod 30, and the piston chamber 23 and the top cap 31 cooperate to limit the initial lowest position of the first suction cup 20.

[0043] In some embodiments, a hexagonal blind hole 33 is formed on the exterior of the fork nut 32 .

[0044] In a specific implementation, the hexagonal blind hole 33 is opened along the axial direction, and a suitable tool can be inserted into the hexagonal blind hole 33 to control the rotation of the fork nut 32 .

[0045] In some embodiments, the inner diameter of the exhaust groove 13 is larger than the outer diameter of the first suction cup 20 initially contacting the polished metal plane 12 , the groove surface 21 is disposed within the sealing surface 22 , and the groove surface 21 is provided with a plurality of strip-shaped protrusions pointing to the center of the first suction cup 20 .

[0046] In specific implementation, the strip-shaped protrusion is used to limit the deformation direction of the first suction cup 20, so that the first suction cup 20 is easier to expand outward when squeezed. When overpressure occurs, the first suction cup 20 expands outward, and the groove surface 21 gradually approaches the exhaust groove 13. When the edge of the groove surface 21 close to the sealing surface exceeds the inner diameter of the exhaust groove, the strip-shaped protrusion contacts the edge of the polished metal plane 12, so that the sealing surface 22 of the first suction cup 20 is separated from the polished metal plane, and a certain distance is formed between the groove surface 21 and the polished metal plane 12, thereby discharging pressure.

[0047] In some embodiments, the valve body 10 is an integral sealed workpiece, and the initial outer diameter of the first suction cup 20 is smaller than the inner diameter of the air inlet 15 .

[0048] In a specific implementation, the integrated valve body 10 can ensure sealing performance, and the initial outer diameter of the first suction cup 20 is smaller than the inner diameter of the air inlet 15 , so that the first suction cup 20 can be placed into the valve body 10 through the air inlet 15 .

[0049] In some embodiments, a dustproof net 14 is also included, and the dustproof net 14 covers the exhaust port 11.

[0050] In a specific implementation, a dustproof net 14 is provided at the exhaust port 11 to prevent foreign matter from sinking onto the first suction cup 20 and thus affecting the sealing effect of the first suction cup 20.

[0051] like Figure 1 and 5 As shown, in some embodiments, a second suction cup 50 is further included, and the second suction cup 50 is disposed outside the exhaust port 11 .

[0052] In a specific implementation, when the system and the valve body 10 are in a negative pressure state, the sealing of the exhaust port 11 can be achieved under the negative pressure state through the external second suction cup 50 .

[0053] In the description of the present invention, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for the convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0054] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0055] The term "comprise" or any other similar term is intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus / device that includes a list of elements includes not only those elements but also other elements not expressly listed, or also includes elements inherent to such process, method, article, or apparatus / device.

[0056] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. A suction cup safety valve, characterized in that: include: The valve body (10) is provided with an exhaust port (11) at the top and an air inlet (15) at the bottom; A first suction cup (20) having a groove surface (21) disposed therein, the first suction cup (20) being disposed in the valve body (10), and the first suction cup (20) being capable of covering the exhaust port (11); A plurality of exhaust grooves (13) are provided at the edge of the inner wall at the top of the valve body (10), and when the groove surface (21) extends to the exhaust grooves (13), the valve body (10) starts exhausting.

2. A suction cup type safety valve according to claim 1, characterized in that: The top inner wall of the valve body (10) is provided with a polished metal plane (12).

3. A suction cup type safety valve according to claim 2, characterized in that: A sealing surface (22) and a groove surface (21) are provided on the side of the first suction cup (20) facing the exhaust port (11); the sealing surface (22) contacts the polished metal plane (12) to form a sealing boundary; and a piston chamber (23) is provided on the side of the first suction cup (20) facing away from the exhaust port (11).

4. A suction cup type safety valve according to claim 3, characterized in that: The inner wall of the air inlet (15) is provided with a pressure setting thread (16).

5. A suction cup type safety valve according to claim 4, characterized in that: It also includes a push rod (30), one end of which is provided with a top cap (31), and the top cap (31) extends into the piston chamber (23). A space is reserved in the piston chamber (23) for enabling the first suction cup (20) to move along the axial direction. The other end of the push rod (30) is provided with a fork nut (32), and the thread on the outer wall of the fork nut (32) is adapted to the pressure setting thread (16).

6. A suction cup type safety valve according to claim 5, characterized in that: The fork nut (32) is provided with a hexagonal blind hole (33) on its exterior.

7. A suction cup safety valve according to claim 2, characterized in that: The inner diameter of the exhaust groove (13) is larger than the outer diameter of the first suction cup (20) initially contacting the polished metal plane (12); the groove surface (21) is arranged inside the sealing surface (22); and the groove surface (21) is provided with a plurality of strip-shaped protrusions pointing toward the center of the first suction cup (20).

8. A suction cup type safety valve according to claim 1, characterized in that: The valve body (10) is an integrated sealed workpiece, and the initial outer diameter of the first suction cup (20) is smaller than the inner diameter of the air inlet (15).

9. A suction cup type safety valve according to claim 1, characterized in that: It also includes a dustproof net (14), wherein the dustproof net (14) covers the exhaust port (11).

10. A suction cup type safety valve according to claim 1, characterized in that: It also includes a second suction cup (50), wherein the second suction cup (50) is arranged outside the exhaust port (11).

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