Air pressure relief valve adopting valve plate of composite structure

Abstract

The utility model discloses an air pressure relief valve adopting a composite structure valve plate, belongs to the technical field of valve plates, and is applied to the field of vehicle pressure relief valves. The problem that the valve plate is easy to damage in use is solved, the maintenance period of the pressure release valve is prolonged, and the long-term, stable and efficient sealing requirements of the valve plate are met. According to the air pressure relief valve adopting the valve plate with the composite structure, the valve plate adopts a three-layer composite structure, and the thickness of the valve plate is 1mm-3mm; the three-layer composite structure is composed of a first rubber layer, a first fabric layer and a second rubber layer, the first fabric layer is arranged between the first rubber layer and the second rubber layer, and the first rubber layer and the second rubber layer are tightly combined together through mould pressing; or the valve plate adopts a five-layer composite structure, and the thickness of the valve plate is 1mm-5mm. The valve plate has the sealing performance of the rubber layer and the toughness of the fabric layer, the valve plate with the fabric layer can better bear work under severe conditions of high pressure, high flow speed, abrasion and the like, the reliability of the pressure release valve is improved, and the service life of the pressure release valve is prolonged.

Description

Technical Field

[0001] The utility model discloses an air pressure relief valve adopting a composite structure valve sheet, which belongs to the technical field of valve sheets and is applied to the field of vehicle pressure relief valves. Background Art

[0002] The automobile pressure relief valve is an important component in the automobile engine, and it plays a key role in the operation of the engine. The pressure relief valve is a safety valve, and its main function is to regulate and control the pressure in the engine system to ensure the normal operation of the engine and protect the engine and its related components from damage. In the automobile engine, the pressure relief valve is usually installed in the fuel system or the intake system. When the pressure in the system exceeds the set value, the pressure relief valve will open to release part of the pressure to keep the pressure in the system within a safe range. According to different working environments and requirements, automobile pressure relief valves are commonly divided into mechanical pressure relief valves, electronic pressure relief valves and pneumatic pressure relief valves, which usually include valve bodies, springs and valve plates. When the pressure in the system exceeds the set pressure value, the valve plate will be pushed open by the pressure to allow pressure release. When the pressure drops to the pressure setting range, the valve plate closes and stops the pressure release.

[0003] In the prior art, a Chinese invention patent with application number 201710512843.3 discloses an exhaust valve plate used in a compressor. The valve plate specifically has a three-layer composite structure, including a first metal valve plate layer, a damping layer and a second metal valve plate layer, wherein the damping layer is made of silicone material, and the unsaturated ethylene bonds of the silicone material are vulcanized.

[0004] In the prior art, a Chinese utility model patent with authorization announcement number CN209325120U discloses a vehicle and a pressure relief valve for the vehicle, wherein the vehicle pressure relief valve includes a valve seat with a valve port and a valve sheet for closing the valve port, and the valve sheet is made of rubber or silicone.

[0005] In the prior art, a Chinese utility model patent with authorization announcement number CN217583203U discloses a pressure relief valve and a vehicle, wherein the pressure relief valve is used for depressurizing a vehicle compartment, and comprises a valve body and a valve sheet, and the valve sheet is made of polyethylene material.

[0006] However, there are still some defects in the prior art: 1. The first and third layers of the valve sheet with three-layer composite structure are both made of metal, but metal has high rigidity and poor elasticity, and cannot meet the deformation requirements;

[0007] 2. The valve plate adopts a single-layer structure. In harsh working environments such as high temperature, high pressure, and strong corrosion, the valve plate material often cannot meet the long-term, stable, and efficient sealing requirements. Utility Model Content

[0008] In view of the shortcomings of the existing technology, the utility model proposes an air pressure relief valve using a composite structure valve plate to solve the problems of the valve plate being easily broken and having poor elasticity due to the material itself during use and being unable to meet the long-term, stable and efficient sealing requirements of the valve plate.

[0009] In order to solve the above technical problems, the technical solution of the utility model is as follows:

[0010] Air pressure relief valve with composite structure valve plate, such as Figure 1 As shown, it includes a valve body; a support seat 2 is provided on the right side of the valve body 8, and a spring guide shell 4 is provided in the support seat 2, and springs 3 are arranged and installed in the spring guide shell 4; a valve plate 1 is provided on the left side of the support seat 2, and the bottom end of the valve plate 1 is fixedly connected to the lower end of the support seat 2; a cavity is provided on the left side of the valve plate 1, and the bottom end of the valve plate 1 is fixedly connected to the lower end of the cavity, wherein the cavity includes an air intake cavity 5 and an exhaust cavity 7; a fixed outer shell 6 with a slot is provided on the outer surface where the support seat 2, the valve plate 1 and the cavity are connected, and the support seat 2, the valve plate 1 and the cavity are tightly connected together through the slot; the valve plate 1 adopts a three-layer composite structure, such as Figure 2-Figure 3 As shown, the thickness of the valve sheet 1 is 1 mm to 3 mm; the three-layer composite structure consists of a first rubber layer 101, a first fabric layer 104, and a second rubber layer 102, wherein the first fabric layer 104 is arranged between the first rubber layer 101 and the second rubber layer 102, and the first rubber layer 101 and the second rubber layer 102 are tightly combined together by molding;

[0011] or

[0012] The valve plate 1 adopts a five-layer composite structure, such as Figure 3-4 As shown, the thickness of the valve sheet 1 is 1 mm to 5 mm; the five-layer composite structure consists of a first rubber layer 101, a first fabric layer 104, a second rubber layer 102, a second fabric layer 105 and a third rubber layer 103, wherein the first fabric layer 104 is arranged between the first rubber layer 101 and the second rubber layer 102, the second fabric layer 105 is arranged between the second rubber layer 102 and the third rubber layer 103, and the first rubber layer 101 and the second rubber layer 102 as well as the second rubber layer 102 and the third rubber layer 103 are tightly combined together by molding.

[0013] The utility model has achieved the expected technical effect: the air pressure relief valve with a composite structure valve plate provided by the utility model reduces the possibility of damage to the valve plate during use by installing a three-layer composite structure valve plate or a five-layer composite structure valve plate in the pressure relief valve, thereby extending the maintenance cycle of the pressure relief valve and meeting the long-term, stable and efficient sealing requirements of the valve plate. According to the type and application location of the pressure relief valve, a valve plate with a three-layer composite structure or a valve plate with a five-layer composite structure made of different materials is selected. On the one hand, the materials of the first rubber layer, the second rubber layer or the third rubber layer have reversible deformation and strong elasticity, so that when the pressure is too high and timely pressure relief is required, the valve plate can be squeezed by the opening force in the system to deform the valve plate to achieve pressure relief of the pressure relief valve; on the other hand, a fabric layer with a certain mesh number formed by weaving or knitting is provided inside the valve plate. The fabric layer formed by weaving has strong pressure resistance and small deformation. After being applied to the inside of the valve plate, the elasticity of the valve plate will be reduced, the structural rigidity of the valve plate will be increased, and the valve plate will have strong bending resistance, so that the smaller the deformation of the valve plate, the larger the opening required for the valve plate; the fabric layer with a certain mesh number formed by knitting has more excellent elasticity and telescopic performance. After being applied to the inside of the valve plate, the elasticity of the valve plate is better, and the required opening force is smaller. The number of fabric layers added is different, so that the valve plate has different pressure resistance, wear resistance and deformation resistance. According to the actual functional needs, the valve plate with different numbers of fabric layers is selected to meet the sealing and durability required for repeated opening of the valve plate.

[0014] In the valve disc with fabric layer, rubber material is used as the main sealing element. Because of its good elasticity and medium resistance, the valve disc can fit closely to the support seat or other contact surface to form an effective seal. At the same time, the rubber material also has a certain corrosion resistance and can resist the erosion of chemical substances in the fluid. The fabric layer is embedded in the rubber material and tightly combined with the rubber material. This combination makes the valve disc have both the sealing performance of rubber and the toughness of the fabric layer. The valve disc with fabric layer can better withstand the work under harsh conditions such as high pressure, high flow rate and wear, and improve the reliability and service life of the pressure relief valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional schematic diagram of the air pressure relief valve using a composite structure valve plate of the utility model.

[0016] Figure 2 This is a schematic structural diagram of a three-layer composite structure valve sheet in an air pressure relief valve using a composite structure valve sheet of the utility model, which also serves as an abstract drawing.

[0017] Figure 3 It is a structural schematic diagram of the valve plate fabric layer in the air pressure relief valve with a composite structure valve plate of the utility model.

[0018] Figure 4 It is a structural schematic diagram of a five-layer composite structure valve sheet in an air pressure relief valve using a composite structure valve sheet of the utility model. DETAILED DESCRIPTION

[0019] The utility model needs to be further limited as follows.

[0020] like Figure 2 to Figure 4 As shown,

[0021] The valve plate 1 is circular, square, annular or arc-shaped.

[0022] The materials of the first rubber layer 101 , the second rubber layer 102 and the third rubber layer 103 are respectively vinyl methyl silicone rubber (VMQ), polytetrafluoroethylene (PTFE), EPDM (ethylene propylene diene monomer rubber), fluororubber (FKM) or nitrile butadiene rubber (NBR).

[0023] The materials of the first fabric layer 104 and the second fabric layer 105 are nylon (PA), polyethylene terephthalate (PET), aramid, polyester, glass fiber or carbon fiber, respectively.

[0024] The material of the first fabric layer 104 or the material of the second fabric layer 105 is formed into a mesh structure by weaving or knitting, and the mesh number of the mesh structure is 10-100 meshes.

[0025] Specifically, the gas enters from the air intake cavity 5. When the pressure of the gas accumulated in the air intake cavity 5 exceeds the preset pressure value, the pressure will squeeze the valve plate 1 inward, causing the valve plate 1 to deform and push open the spring guide shell 4, compressing the spring 3. At this time, the air path is opened, the air intake cavity 5 and the exhaust cavity 7 are connected, and the pressure in the air intake cavity 5 will be released and discharged outward through the exhaust cavity 7, thereby achieving the purpose of pressure relief; when the pressure value in the air intake cavity 5 is consistent with the preset pressure value, the pressure in the air intake cavity 5 is no longer squeezing the valve plate 1, and the valve plate 1 is closed, the air intake cavity 5 and the exhaust cavity 7 are sealed, and the pressure relief is stopped. On the other hand, when the air intake pressure in the air intake cavity 5 is not enough to open the valve plate 1, the valve plate 1 is in a closed state, sealing the air intake cavity 5 and the exhaust cavity 7.

[0026] The above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the present invention.

Claims

1. An air pressure relief valve using a composite structure valve plate, comprising a valve body; a support seat (2) is provided on the right side of the valve body (8), a spring guide shell (4) is provided in the support seat (2), and a spring (3) is arranged and installed in the spring guide shell (4); a valve plate (1) is provided on the left side of the support seat (2), and the bottom end of the valve plate (1) is fixedly connected to the lower end of the support seat (2); a cavity is provided on the left side of the valve plate (1), and the bottom end of the valve plate (1) is fixedly connected to the lower end of the cavity, wherein the cavity comprises an air intake cavity (5) and an exhaust cavity (7); a fixed outer shell (6) with a slot is provided on the outer surface where the support seat (2), the valve plate (1) and the cavity are connected, and the support seat (2), the valve plate (1) and the cavity are tightly connected together by riveting, characterized in that: The valve plate (1) adopts a three-layer composite structure, and the thickness of the valve plate (1) is 1 mm to 3 mm; the three-layer composite structure consists of a first rubber layer (101), a first fabric layer (104) and a second rubber layer (102), wherein the first fabric layer (104) is arranged between the first rubber layer (101) and the second rubber layer (102), and the first rubber layer (101) and the second rubber layer (102) are tightly combined together by molding; or The valve plate (1) adopts a five-layer composite structure, and the thickness of the valve plate (1) is 1 mm to 5 mm; the five-layer composite structure consists of a first rubber layer (101), a first fabric layer (104), a second rubber layer (102), a second fabric layer (105) and a third rubber layer (103), wherein the first fabric layer (104) is arranged between the first rubber layer (101) and the second rubber layer (102), the second fabric layer (105) is arranged between the second rubber layer (102) and the third rubber layer (103), and the first rubber layer (101) and the second rubber layer (102) and the third rubber layer (103) are tightly combined together by molding.

2. The air pressure relief valve using a composite structure valve sheet according to claim 1, characterized in that: The valve plate (1) is circular, square, annular or arc-shaped.

3. The air pressure relief valve using a composite structure valve sheet according to claim 1, characterized in that: The materials of the first rubber layer (101), the second rubber layer (102) and the third rubber layer (103) are respectively vinyl methyl silicone rubber (VMQ), polytetrafluoroethylene (PTFE), EPDM (ethylene propylene diene monomer rubber), fluororubber (FKM) or nitrile butadiene rubber (NBR).

4. The air pressure relief valve using a composite structure valve sheet according to claim 1, characterized in that: The materials of the first fabric layer (104) and the second fabric layer (105) are respectively nylon (PA), polyethylene terephthalate (PET), aramid, polyester, glass fiber or carbon fiber.

5. The air pressure relief valve using a composite structure valve sheet according to claim 4, characterized in that: The material of the first fabric layer (104) or the material of the second fabric layer (105) is respectively woven or knitted to form a mesh structure, and the mesh number of the mesh structure is 10 to 100 meshes.

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