Gas valve

Abstract

The invention provides a gas valve which comprises a valve body and further comprises a pressure difference adjusting device, and the pressure difference adjusting device comprises a valve element part and a matching part. The valve element component is of an integrally-formed structure and comprises a valve rod and a flange part, and the flange part comprises a sealing part. The matching piece is fixedly connected with the valve body, the matching piece is provided with a valve port abutting part and comprises a deformation part, and the inner wall face of the deformation part forms part of the valve port abutting part; when the pressure difference adjusting device is in a closed state, the sealing part abuts against the valve port abutting part, and the deformation part can deform in the direction away from the flange part. The gas valve can relatively improve the condition that the contact part of the valve core component and the valve port abutting part is easy to deform.

Description

[0001] This application is a divisional application of patent application number 202110040514.X, application date January 13, 2021, and invention name “A gas valve”. Technical Field

[0002] The present invention relates to the technical field of gas control, and in particular to a gas valve. Background Art

[0003] Gas valves are widely used in gas systems. The gas valve includes a valve body, which is provided with a main valve mouth and a pressure differential regulating device. The pressure differential regulating device includes a valve plug and a valve stem. The valve plug is generally made of rubber and is engaged with the valve stem. The valve plug can approach or move away from the main valve mouth. As a technical personnel in this field, it is necessary to minimize the deformation of the contact area between the valve plug and the main valve mouth under frequent actuation. Summary of the invention

[0004] The main purpose of the present application is to provide a gas valve which can relatively improve the situation that the contact portion between the valve core component and the valve port abutment portion is easily deformed.

[0005] The present application provides a gas valve, comprising a valve body and a pressure difference regulating device, wherein the pressure difference regulating device comprises a valve core component and a matching component;

[0006] The valve core component is an integrally formed structure, the valve core component comprises a valve stem and a flange portion, and the flange portion comprises a sealing portion;

[0007] The fitting is fixedly connected to the valve body, and is provided with a valve port abutment portion. The fitting includes a deformation portion, and an inner wall surface of the deformation portion forms part of the valve port abutment portion. When the differential pressure regulating device is in a closed state, the sealing portion abuts against the valve port abutment portion, and the deformation portion can be deformed in a direction away from the flange portion.

[0008] The present invention improves the structure of the pressure difference regulating device of the gas valve, thereby relatively improving the situation that the contact part between the valve core component and the valve port abutment part is easily deformed. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 A cross-sectional view of the overall structure of the gas valve provided for this application;

[0010] Figure 2 A cross-sectional schematic diagram of a first embodiment of the pressure difference regulating device provided in the present application;

[0011] Figure 3 for Figure 2 A schematic cross-sectional view of a part of the structure;

[0012] Figure 4 A schematic cross-sectional view of a second embodiment of the pressure difference regulating device provided in the present application. DETAILED DESCRIPTION

[0013] It should be noted that the present application is mainly aimed at optimizing the design of the structure of the pressure differential regulating device, with an emphasis on protecting the valve core components, fittings, valve body, valve body seat structure, and the coordination or connection relationship between them. Other diaphragm components, elastic components, etc. can be adaptively improved according to customer or gas system requirements. The present application only exemplifies that the protected pressure differential regulating device can be applied to the gas valve structure of the gas system. It should be noted that the structure of the present application applied in other products should also fall within the scope of protection of the present application.

[0014] The first embodiment of the present invention is described in detail below in conjunction with the accompanying drawings. Figure 1 As shown, the present invention provides a gas valve, including a valve body, the valve body is provided with an inlet 1a and an outlet 1b, the valve body 1 is also provided with a first valve port 11, a second valve port 12, a third valve port, i.e., a proportional regulating valve port 103, a main valve port 104, and a gas flow channel 105, the valve body of the gas valve can be formed by aluminum alloy die casting, the gas valve also includes a safety electromagnetic drive device 100, a proportional regulating device 200 and a pressure difference regulating device 300, the safety electromagnetic drive device 100 includes a main valve plug 101 and an auxiliary valve plug 102, the main valve plug 101 can approach or move away from the first valve port 11, the auxiliary valve plug 102 can approach or move away from the second valve port 12, the safety electromagnetic drive device 100 is fixedly connected to the valve body 1 as a whole, and the safety electromagnetic drive device 100 is used as a safety control device of the gas valve to ensure that the gas is used In order to ensure safety, when the first valve port 11 cannot be closed smoothly, the auxiliary valve plug 102 can still close the second valve port 12. The proportional adjustment device 200 includes a diaphragm assembly, which can be close to or away from the third valve port 103. When the diaphragm assembly is relatively close to the third valve port 103, the gas pressure acting on the gas flow channel 105 increases, thereby acting on the buffer back pressure cavity 1A of the differential pressure adjustment device 300, so that the gas flow through the main valve port 104 is relatively large; or when the diaphragm assembly is relatively far away from the third valve port 103, the gas pressure acting on the gas flow channel 105 is relatively reduced, thereby reducing the pressure acting on the buffer back pressure cavity 1A of the differential pressure adjustment device 300, and the back pressure diaphragm assembly 302 descends, so that the gas flow through the main valve port 104 is relatively small, thereby realizing the regulation of the gas flow.

[0015] Combine the following Figure 1-Figure 3The differential pressure regulating device provided by the present application is introduced in detail. The differential pressure regulating device 300 includes a valve core component 301, a valve body seat 303, and a fitting 40. The valve core component 301 is integrally formed by plastic material, and includes a flange portion 3011 and a valve stem 3012. The flange portion 3011 is located above the valve stem 3012. The flange portion 3011 extends approximately radially away from the axis of the differential pressure regulating device 300. The components of the valve core component 301 include bronze powder and polytetrafluoroethylene compound materials. The valve core component 301 made of this material has high wear resistance and corrosion resistance. Even if the main valve port 104 is frequently closed or opened, the impact is relatively small. The edge portion 3011 includes a sealing portion 3011a, which is formed on the outer periphery of the flange portion 3011. The sealing portion 3011a is generally in a conical structure. The cross-sectional area of ​​the sealing portion 3011a on the side relatively close to the valve stem 3012 is smaller than the cross-sectional area of ​​the sealing portion 3011a on the side relatively far from the valve stem 3012. The valve body seat 303 can be formed by plastic material as a whole, including a valve body seat body 3031 and a support portion 3032. The valve stem 3012 passes through the through hole of the valve body seat body 3031. During the action of closing and opening the main valve port 104 of the valve core component 301, the through hole of the valve body seat body 3031 can guide the valve stem 3012. The differential pressure regulating device 300 also includes an elastic member 304, one end of which abuts against the valve body seat body 3031, and the other end abuts against the end step of the valve stem 3012.

[0016] The support portion 3032 includes a support portion body 3032b and a support portion protrusion 3032a, the support portion protrusion 3032a protrudes upward away from the valve body seat body 3031, the support portion body 3032b is supported on the valve body 1 and abuts against the valve body 1, in order to better fix the valve body seat 303 and the valve body 1, the outer peripheral wall of part of the support portion body 3032b can be press-fitted with the inner wall of the valve body 1, the matching piece 40 includes a connecting frame 41 made of metal material and a matching portion 42, the matching portion 42 can be processed and formed by rubber material, the connecting frame 41 is generally embedded with the matching portion 42, the connecting frame 41 is generally in an inverted L-shaped structure, including a flange portion 411 and a straight portion 412, the flange portion 411 is generally horizontally connected The straight portion 412 is embedded in the matching portion 42, a part of the flanged portion 411 is embedded in the matching portion 42, and another part of the flanged portion 411 protrudes from the terminal end surface of the matching portion body 422 of the matching portion 42. The flanged portion 411 and the valve body 1 can be fixedly connected by welding. The matching portion 42 includes a matching portion body 422 and an extension portion 421. The extension portion 421 protrudes downward toward the valve body seat body 3031. The pressure difference regulating device 300 is provided with a receiving portion B1. The outer peripheral surface of the support portion protrusion 3022a and the inner wall portion of the valve body 1 roughly define the receiving portion B1. At least a part of the extension portion 421 is located in the receiving portion B1. After the matching member 40 is installed with the valve body 1, the space where the receiving portion B1 is located is partially occupied by the extension portion 4 21 is filled, the pressure difference regulating device 300 also includes a sealing member 50, the sealing member 50 is located in the sealing member accommodating portion, and the sealing member accommodating portion is roughly defined by the part of the matching part body 422, the extension part 421, the inner wall of the valve body 1 and the upper end surface 30321b of the supporting part body 3032b, and the upper side of the sealing member 50 is against the matching part body 422, that is, the upper side of the sealing member 50 is against the lower end surface 422a of the matching part body 422, the lower side of the sealing member 50 is against the upper end surface of the supporting part body 3032b, and the outer side of the sealing member 50 is against the inner wall of the valve body 1 to prevent the gas from leaking outward from the gap between the parts to cause a safety hazard, and the part of the matching part body 422 is against the supporting part protrusion 3022a That is, the lower end surface of the partial matching part body 422 abuts against the upper end surface of the supporting part protrusion 3022a, and the matching part 42 is also provided with a valve port abutting portion 4225. The valve port abutting portion 4225 in the present application can be a valve port abutting surface portion matched with the sealing part 3011a, the valve port abutting portion 4225 is matched with the shape of the sealing part 3011a, the valve port abutting portion 4225 is roughly in the shape of an inverted cone, the sealing part 3011a can approach or move away from the valve port abutting portion 4225 to adjust the gas flow rate of the gas valve, the partial matching part body 422 constituting the sealing component accommodating portion is relatively far away from the valve port abutting portion 4225, and the partial matching part body 422 abutting against the supporting part protrusion 3022a is relatively close to the valve port abutting portion 4225.

[0017] The mating portion body 422 further includes a deformation portion 4224, the inner wall surface of the deformation portion 4224 forms a partial valve port abutment portion 4225, the cross-sectional area of ​​the deformation portion 4224 on the side close to the extension portion 421 is smaller than the cross-sectional area of ​​the side away from the extension portion 421, the deformation portion 4224 extends approximately along the axial direction of the pressure difference regulating device 300, the deformation portion 4224 protrudes in a direction away from the support portion 3032, the mating portion body 422 further includes a protrusion 4222 and a recess 4223, the recess 4223 is located between the deformation portion 4224 and the protrusion 4222, and the deformation portion 4224 is closer to the flange portion 301 than the recess 4223 1. When the sealing portion 3011a of the flange portion 3011 abuts against the valve port abutting portion 4225, the pressure difference regulating device 300 is in a closed state as a whole, blocking the outward flow of the gas; when the sealing portion 3011a is relatively far away from the valve port abutting portion 4225, the gas flows to the outlet 1b through the main valve port 104 and enters the burner. When the pressure difference regulating device 300 is in a closed state as a whole, the sealing portion 3011a of the flange portion 3011 abuts against the valve port abutting portion 4225, and at this time, the deformation portion 4224 can deform in a direction close to the connecting frame 41, that is, the deformation portion 4224 can deform in a direction away from the flange portion 3011.

[0018] By optimizing and improving the structure of the pressure difference regulating device, compared with the valve stem structure of the background technology, the overall strength of the valve core component 301 is more reliable. It is an integrally processed and molded structure of plastic material, and in the process of frequently opening or closing the main valve port 104, it is necessary to frequently contact the valve port abutment part 4225. Since the deformation part 4224 arranged on the matching part 40 can perform elastic deformation, it can improve the situation that the sealing part 3011a of the valve core component 301 and the contact part of the valve port abutment part 4225 are prone to deformation, thereby greatly improving the strength of the components and the actuation reliability.

[0019] [P] Figure 4The second embodiment provided by the present application is shown, which is different from the first embodiment in the installation position of the sealing member 40'. In this embodiment, the valve core component 301' includes a valve stem 3012' and a matching portion 3011'. The matching portion 3011' is located above the valve stem 3012'. The matching portion 3011' is roughly extended and protruded radially outward from the valve stem 3012'. The matching portion 3011' is provided with a matching groove 3011a'. The matching groove 3011a' is integrally formed by being concave toward the axial direction of the valve core component 301'. The sealing member 40' can be formed of a rubber flexible material and is extruded and sleeved on the matching portion 3011'. At least part of the sealing member 40' is located in the matching groove 3011a'. The sealing member 40' includes a sealing portion, a sealing portion, and a sealing portion. The outer peripheral surface of 40' forms the sealing part, and also includes a valve body seat 303', the valve body seat 303' includes a valve body seat body 3031' and a support part 3032', the valve body seat 303' can be integrally formed by plastic material, the valve body seat body 303' is located at the outer peripheral part of the valve stem 3012' and is fixedly connected with the valve stem 3012' by press-fitting or by providing a recess in one of them and a convex part in the other to achieve a snap-on limit connection, the support part 3032' includes a support part protrusion and a support part body, the support part protrusion as a whole protrudes upward relative to the support part body, the pressure difference regulating device also includes a sealing ring 50, the pressure difference regulating device is provided with a accommodating part, the sealing ring 50 and the support part protrusion and the upper end surface of the support part body roughly define the The accommodating portion, the pressure difference regulating device also includes a fitting 60. In this embodiment, the fitting 60 can be formed by metal material. The fitting 60 includes a main body 61 and an extension portion 62. The extension portion 62 extends and protrudes relative to the main body 61 in the direction close to the valve body seat body 3031'. At least part of the extension portion 62 is located in the accommodating portion. The fitting 60 is also provided with a valve port abutment portion 63. The cross-sectional area of ​​the valve port abutment portion on the side relatively close to the valve body seat body is smaller than the cross-sectional area of ​​the valve port abutment portion on the side relatively far away from the valve body seat body. The sealing member 40' can be close to or away from the valve port abutment portion 63 as a whole, and the lower end surface of the body of the fitting 60 on the side relatively close to the valve port abutment portion abuts against the supporting protrusion, and the lower end of the body of the fitting 60 on the side relatively far away from the valve port abutment portion. The surface of the seal 40' abuts against the sealing ring 50. When the differential pressure regulating device is in a closed state, the sealing portion of the seal 40' abuts against the valve port abutting portion 63, and the seal 40' further includes a deformation portion 402', a recessed portion 403' and a raised portion 401'. The deformation portion 402' extends approximately along the axial direction of the differential pressure regulating device, and the deformation portion 402' extends and protrudes relative to the seal body toward the valve body seat body. The extension direction of the raised portion 401' can be consistent with the extension direction of the deformation portion 402'. The recessed portion 403' is between the raised portion 401' and the deformation portion 402'. When the differential pressure regulating device is in a closed state, the sealing portion abuts against the valve port abutting portion 63, and the deformation portion 402' can be deformed toward the axial direction close to the differential pressure regulating device.In the present embodiment, the valve core component 301 is made of bronze powder and polytetrafluoroethylene compound materials. The valve core component 301 made of such materials has high wear resistance and corrosion resistance, so as to improve the strength of the component and extend its service life. At the same time, since the deformation portion added to the seal 40' can perform elastic deformation, the deformation of the sealing portion of the valve core component and the contact portion of the valve port abutment portion can be improved, thereby greatly improving the strength of the component and the reliability of operation. [ / P][P]The present application provides a gas valve, including a valve body and a pressure differential regulating device, the pressure differential regulating device including a valve core component, a valve body seat, a matching piece and a sealing piece, the valve core component is an integrally formed structure, the valve core component includes a valve stem and a matching piece, the sealing piece is limitedly connected to the matching piece, the valve body seat includes a valve body seat body and a supporting part, the valve body seat body is located at the outer periphery of the valve stem and connected to the valve stem, part of the supporting part is supported on the valve body, the matching piece includes a main body part and an extending part, the extending part protrudes toward the direction close to the valve body seat body, the pressure differential regulating device is provided with a receiving part, at least part of the extending part is located in the receiving part; [ / P][P]The main body part is provided with a valve port stop,

[0020] The present application provides a gas valve, including a valve body and a pressure differential regulating device, the pressure differential regulating device including a valve core component, a valve body seat, a matching piece and a sealing piece, the valve core component is an integrally formed structure, the valve core component includes a valve stem and a matching piece, the sealing piece is limitedly connected with the matching piece, the valve body seat includes a valve body seat body and a supporting part, the valve body seat body is located at the outer periphery of the valve stem and connected to the valve stem, part of the supporting part is supported on the valve body, the matching piece includes a main body part and an extending part, the extending part protrudes toward the direction close to the valve body seat body, the pressure differential regulating device is provided with a receiving part, at least part of the extending part is located in the receiving part;

[0021] The main body is provided with a valve port abutment portion, the sealing member includes a sealing member body and a deformation portion, the deformation portion extends toward the direction close to the valve body seat body, and the deformation portion extends roughly along the axial direction of the pressure differential regulating device, the sealing member includes a sealing portion, when the pressure differential regulating device is in a closed state, the sealing portion abuts against the valve port abutment portion, and the deformation portion can be deformed toward the axial direction close to the pressure differential regulating device.

[0022] It should be noted that the ordinal numbers such as "first, second" and the directional words such as "upper, lower" mentioned in the present invention are all described based on the drawings in the specification. They are only used to distinguish the naming methods of different components and should not be considered to have any restrictions on the order of the components. The above are only preferred embodiments of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A gas valve, characterized in that: It comprises a valve body (1), and also comprises a pressure difference regulating device (300), wherein the pressure difference regulating device (300) comprises a valve core component (301) and a matching component (40); The valve core component (301) is an integrally formed structure, and the valve core component (301) comprises a valve stem (3012) and a flange portion (3011), and the flange portion (3011) comprises a sealing portion (3011a); The fitting (40) is fixedly connected to the valve body (1), and the fitting (40) is provided with a valve port abutment portion (4225). The fitting (40) includes a deformation portion (4224), and the inner wall surface of the deformation portion (4224) forms part of the valve port abutment portion (4225); when the differential pressure regulating device is in a closed state, the sealing portion (3011a) abuts against the valve port abutment portion (4225), and the deformation portion (4224) can be deformed in a direction away from the flange portion (3011).

2. The gas valve according to claim 1, characterized in that: The mating piece (40) includes a mating portion (42), the mating portion (42) includes a mating portion body (422), the mating portion body (422) includes the deformation portion (4224), the protrusion (4222) and the recess (4223), the recess (4223) is located between the deformation portion (4224) and the protrusion (4222), and the deformation portion (4224) is closer to the flange portion (3011) relative to the recess (4223).

3. The gas valve according to claim 2, characterized in that: The matching component (40) further comprises a connecting frame (41) made of a metal material, the matching portion (42) is formed by processing from a rubber material, and the connecting frame (41) and the matching portion (42) are embedded and matched; the connecting frame (41) is fixedly connected to the valve body (1).

4. The gas valve according to claim 3, characterized in that: The connecting frame (41) is in an inverted L-shaped structure, comprising a flange portion (411) and a straight portion (412), the flange portion (411) being in a horizontal structure, the straight portion (412) being embedded in the matching portion (42), a portion of the flange portion (411) being embedded in the matching portion (42), and another portion of the flange portion (411) protruding out of the matching portion (42) and being welded and fixed to the valve body (1).

5. The gas valve according to claim 1, characterized in that: The differential pressure regulating device (300) further comprises a valve body seat (303), wherein the valve body seat (303) is fixedly connected to the valve body (1); the valve body seat (303) comprises a valve body seat body (3031) and a support portion (3032), wherein the valve body seat body (3031) is located at the outer periphery of the valve stem (3012), the valve stem (3012) passes through a through hole of the valve body seat body (3031), and a portion of the support portion (3032) is supported on the valve body (1).

6. The gas valve according to claim 5, characterized in that: The support portion (3032) comprises a support portion body (3032b) and a support portion protrusion (3032a), wherein the support portion protrusion (3032a) protrudes upward in a direction away from the valve body seat body (3031), and the support portion body (3032b) is supported on the valve body (1) and abuts against the valve body (1); The differential pressure regulating device (300) is provided with a housing portion (B1), and the housing portion (B1) is defined by the outer peripheral surface of the support portion protrusion (3032a) and the inner wall portion of the valve body (1); The mating piece (40) comprises a mating portion (42), wherein the mating portion (42) comprises a mating portion body (422) and an extension portion (421), wherein the extension portion (421) protrudes downward from the lower end surface of the mating portion body (422) toward the valve body seat body (3031), and at least a portion of the extension portion (421) is located in the accommodating portion (B1), and a portion of the lower end surface of the mating portion body (422) abuts against the upper end surface of the support portion protrusion (3032a).

7. The gas valve according to claim 6, characterized in that: The pressure difference regulating device (300) further comprises a sealing element (50); Part of the matching portion body (422), the extending portion (421), the inner wall portion of the valve body (1), and the upper end surface of the supporting portion body (3032b) define a sealing component accommodating portion; The seal (50) is located in the seal accommodating portion, the upper side of the seal (50) abuts against the matching portion body (422), the lower side of the seal (50) abuts against the upper end surface of the supporting portion body (3032b), and the outer side of the seal (50) abuts against the inner wall of the valve body (1).

8. The gas valve according to claim 6, characterized in that: The outer peripheral wall of a portion of the support portion body (3032b) is press-fitted with the inner wall of the valve body (1).

9. The gas valve according to any one of claims 1 to 8, characterized in that: The flange portion (3011) is located above the valve stem (3012), the flange portion (3011) extends radially in a direction away from the axis of the differential pressure regulating device (300), the sealing portion (3011a) is located at the outer periphery of the flange portion (3011), the sealing portion (3011a) is in a conical structure, and the cross-sectional area of ​​the side of the sealing portion (3011a) relatively close to the valve stem (3012) is smaller than the cross-sectional area of ​​the side of the sealing portion (3011a) relatively far from the valve stem (3012); The cross-sectional area of ​​the side of the valve port abutment portion (4225) that is relatively close to the valve stem (3012) is smaller than the cross-sectional area of ​​the side of the valve port abutment portion (4225) that is relatively far from the valve stem (3012).

10. The gas valve according to any one of claims 1 to 8, characterized in that: The valve core component is integrally formed from a plastic material, and the material used to make the valve core component includes bronze powder and polytetrafluoroethylene compound material.

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