Water-gas linkage valve and gas device

Abstract

This utility model belongs to the technical field of gas device technology, and discloses a water-gas linkage valve and a gas device. The water-gas linkage valve includes a valve seat, a valve, and an elastic element. The valve seat has a sliding cavity with an opening at one end. The bottom of the sliding cavity has an outlet that extends through the other end of the valve seat. The valve and the elastic element are both disposed within the sliding cavity, with the elastic element sandwiched between the open end of the valve seat and the valve. Under the elastic force of the elastic element, the valve can block the outlet. The outer wall of the valve slides against the inner wall of the sliding cavity, and the outer wall of the valve has a venting groove. By providing a venting groove on the outer wall of the valve, when the outer wall of the valve slides against the inner wall of the sliding cavity of the valve seat, gas can still enter from one side of the sliding cavity through the venting groove to the other side. The fit between the outer wall of the valve and the inner wall of the sliding cavity ensures that the sliding cavities of the valve and the valve seat are coaxially distributed.

Description

Technical Field

[0001] This utility model relates to the field of gas device technology, and in particular to a water-gas linkage valve and a gas device. Background Technology

[0002] A water-gas interlock valve is a device that uses water signals (water flow rate, water pressure) to control the flow of gas. Common water-gas interlock valves utilize Bernoulli's principle: the area at the throat of the venturi tube is the smallest, causing the water flow to accelerate and the pressure to drop significantly. This creates a pressure difference across the diaphragm, pushing the linkage shaft to move. This shaft then moves the valve and simultaneously rotates the microswitch's fork. The microswitch contacts spring back, creating a circuit in the pulse igniter. The ignition needle then activates and opens the solenoid valve, allowing gas to enter the burner for combustion.

[0003] The water-gas linkage valve includes a valve, a valve seat, and a linkage shaft. The side walls of the valve and valve seat are spaced apart to allow combustion gas to pass through. To ensure control accuracy and sealing, the valve and valve seat need to be coaxial during operation. In existing technology, the valve seat and linkage shaft are coaxial, with a connecting hole located at the axial position of the valve end facing the linkage shaft. The linkage shaft is inserted into this connecting hole to maintain coaxiality between the valve and valve seat during operation. This design requires coaxial installation of the linkage shaft, valve, and valve seat, placing high precision requirements on the components and resulting in complex assembly and low assembly efficiency. Utility Model Content

[0004] The first technical problem solved by this utility model is to provide a water-air linkage valve that can facilitate improved assembly efficiency.

[0005] The second technical problem solved by this utility model is to provide a gas device that can facilitate improved assembly efficiency.

[0006] The first technical problem mentioned above is solved by the following technical solution:

[0007] A water-gas linkage valve includes a valve housing. Inside the valve housing are a valve seat, a valve, an elastic element, and a linkage shaft. The valve seat has an open sliding cavity at one end. An outlet is located at the bottom of the sliding cavity, extending through the other end of the valve seat. The valve is coaxially disposed within the sliding cavity. The valve includes a main body and a blocking portion located at the end of the main body facing the outlet. A limiting portion is formed on the periphery of the main body, slidingly fitting against the inner wall of the sliding cavity. The blocking portion is spaced apart from the inner wall of the sliding cavity. Under the elastic force of the elastic element, the valve can drive the blocking portion to block the outlet. The linkage shaft abuts against the end of the blocking portion away from the main body.

[0008] The outer wall of the main body is provided with at least one ventilation groove, which extends through both ends of the main body along the axial direction of the sliding cavity.

[0009] The water-air linkage valve described in this utility model has the following advantages compared with the prior art:

[0010] The limiting part slides and fits against the inner wall of the sliding cavity of the valve seat, allowing the valve to slide coaxially within the sliding cavity of the valve seat. This facilitates the coaxial connection between the valve and the valve seat, thereby improving control accuracy and sealing performance. Simultaneously, by opening a vent groove on the outer wall of the valve, the combustion gas can enter the outlet from one side of the sliding cavity through the vent groove. The linkage shaft abuts against the end of the main body, enabling the linkage shaft to drive the valve to open the outlet. The linkage shaft does not need to be coaxially installed with the valve and valve seat, reducing assembly difficulty and improving assembly efficiency.

[0011] In one embodiment, the main body is provided with a plurality of circumferentially spaced limiting portions, and the ventilation groove is formed between adjacent limiting portions.

[0012] In one embodiment, the sealing part includes a sealing ring and a plug. Under the elastic action of the elastic element, the sealing ring abuts against the bottom of the sliding cavity and blocks the air outlet; the plug is inserted into the air outlet, and there is a gap between the plug and the inner wall of the air outlet.

[0013] In the direction closer to the linkage shaft, the plug includes a first straight section, a first inclined section, a second straight section, and a second inclined section distributed in sequence. The diameter of the first straight section is larger than the diameter of the second straight section, and the diameters of the first inclined section and the second inclined section gradually decrease.

[0014] In one embodiment, the second inclined segment, in the direction closer to the linkage shaft, includes an inclined segment one and an inclined segment two distributed sequentially.

[0015] The angle between the inclined surface of the first inclined section and the axis of the plug, the angle between the inclined surface of the first inclined section and the axis of the plug, and the angle between the inclined surface of the second inclined section and the axis of the plug increase sequentially.

[0016] In one embodiment, the valve further includes a first limiting post disposed on the end of the main body opposite to the air outlet and a second limiting post disposed on the first limiting post, wherein the outer diameter of the second limiting post is smaller than the outer diameter of the first limiting post.

[0017] The elastic element includes an outer spring and an inner spring. The outer spring is sleeved on the first limiting post and elastically abuts against the valve and the valve seat at the end where the opening is provided. The inner spring is sleeved on the second limiting post and elastically abuts against the first limiting post and the valve seat at the end where the opening is provided.

[0018] In one embodiment, the sealing ring has an annular protrusion on the side facing the bottom of the sliding cavity.

[0019] In one embodiment, the water-air linkage valve further includes a spring seat disposed within the sliding cavity and distributed near the opening, and an elastic element elastically disposed between the spring seat and the valve; the spring seat is provided with a connecting hole for air passage.

[0020] In one embodiment, the inner wall of the sliding cavity is provided with a retaining ring, and the side of the spring seat away from the elastic element abuts against the retaining ring.

[0021] In one embodiment, the valve housing has a mounting cavity, the valve seat is disposed in the mounting cavity, and the mounting cavity and the sliding cavity are connected through the opening.

[0022] In one embodiment, a sealing ring is provided between the inner wall of the mounting cavity and the outer wall of the valve seat, the sealing ring being located between the opening and the outlet.

[0023] The second technical problem mentioned above is solved by the following technical solution:

[0024] The gas-fired device includes the water-gas linkage valve described in any of the above embodiments.

[0025] Compared with the prior art, the gas device described in this utility model has the following advantages:

[0026] By setting up a water-air linkage valve, assembly is simplified, assembly efficiency is improved, and the machining accuracy and cost of each component are reduced. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the separate structure of the valve seat, valve, elastic element and spring seat involved in the embodiment of this utility model;

[0028] Figure 2 This is a schematic diagram of the valve seat structure involved in the embodiment of this utility model;

[0029] Figure 3 This is a schematic diagram of the valve structure involved in the embodiment of this utility model;

[0030] Figure 4This is a first cross-sectional schematic diagram of the water-air linkage valve provided in this embodiment of the utility model;

[0031] Figure 5 This is a schematic diagram of the sealing ring involved in the embodiment of this utility model;

[0032] Figure 6 This is a second cross-sectional schematic diagram of the water-air linkage valve provided in this embodiment of the utility model;

[0033] Figure 7 yes Figure 6 Enlarged view of the structure at point A in the middle;

[0034] Figure 8 This is a schematic diagram of the structure of the first housing involved in the embodiment of this utility model.

[0035] In the picture:

[0036] 1. Valve seat; 11. Sliding cavity; 12. Opening; 13. Air outlet; 2. Valve; 21. Main body; 211. Vent groove; 212. Limiting part; 22. Plug; 221. First straight section; 222. First inclined section; 223. Second straight section; 224. Second inclined section; 2241. Inclined section one; 2242. Inclined section two; 23. First limiting post; 24. Second limiting post; 3. Spring seat; 31. Connecting hole; 4. Elastic element; 41. Outer spring; 42. Inner spring; 5. Valve body; 51. First housing; 511. Pressure measuring port; 512. Connecting groove; 52. Second housing; 53. Gap; 6. Sealing ring; 61. Annular protrusion; 7. Sealing ring; 8. Linkage shaft; 9. Water valve; 91. Water pressure diaphragm. Detailed Implementation

[0037] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0038] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0039] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0040] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0041] like Figures 1-8 As shown, this utility model embodiment provides a water-air linkage valve, which includes a valve body 5 and a valve seat 1, a valve 2, a spring seat 3 and an elastic element 4 disposed in the valve body 5.

[0042] The valve seat 1 has a sliding cavity 11 with an opening 12 at one end of the valve seat 1. The bottom of the sliding cavity 11 has an air outlet 13 that passes through the other end of the valve seat 1. The valve 2 and the elastic element 4 are both disposed in the sliding cavity 11. The elastic element 4 is sandwiched between the end of the valve seat 1 with the opening 12 and the valve 2. The spring seat 3 is disposed in the sliding cavity 11 and close to the opening 12. The spring seat 3 has a connecting hole 31 (one or more connecting holes 31 can be provided). That is, the elastic element 4 is sandwiched between the spring seat 3 and the valve 2. The valve 2 can block the air outlet 13 under the elastic force of the elastic element 4. Specifically, the valve 2 includes a main body 21 and a blocking part disposed on the end of the main body 21 facing the air outlet 13. A limiting part 212 is formed on the periphery of the main body 21. The limiting part 212 slides and fits against the inner wall of the sliding cavity 11. The blocking part is spaced apart from the inner wall of the sliding cavity 11. Under the elastic force of the elastic member 4, the valve 2 can drive the blocking part to block the air outlet 13.

[0043] Specifically, the sealing part includes a sealing ring 6 and a plug 22. Under the elastic action of the elastic member 4, the sealing ring 6 abuts against the bottom of the sliding cavity 11 and blocks the air outlet 13; the plug 22 is inserted into the air outlet, and there is a gap between the plug 22 and the inner wall of the air outlet 13.

[0044] In this embodiment, the water-gas linkage valve also includes a linkage shaft 8 and a water valve 9. A water pressure diaphragm 91 is provided inside the water valve 9. When a pressure difference is formed on both sides of the water pressure diaphragm 91, it pushes the linkage shaft 8 to move. When the linkage shaft 8 moves, it can abut against the end of the plug 22 away from the main body 21 to push the valve 2 to move and compress the elastic element 4. When the valve 2 moves away from the air outlet 13, the sealing ring 6 and the bottom of the sliding cavity 11 separate, so that the air outlet 13 opens and the gas enters the combustion chamber for combustion through the air outlet 13.

[0045] To ensure that the sliding cavity 11 of valve 2 and valve seat 1 is coaxially arranged, a limiting part 212 is formed on the periphery of the main body 21. The limiting part 212 slides and fits against the inner wall of the sliding cavity 11, and at least one ventilation groove 211 is provided on the outer wall of the main body 21. The ventilation groove 211 passes through both ends of the main body 21 along the axial direction of the sliding cavity 11. That is, the ventilation groove 211 can connect the space of the sliding cavity 11 to both sides of the valve 2. By the limiting part 212 sliding and fitting against the inner wall of the sliding cavity 11, the valve 2 can always maintain coaxiality when sliding in the sliding cavity 11. This avoids the need to provide a connecting hole for the valve 2. Instead, the linkage shaft 8 only needs to abut against the valve 2 when it moves. There is no need for the linkage shaft 8 to be coaxial with the valve 2, which simplifies the design. When the linkage shaft 8 pushes the valve 2 to open the outlet 13, the gas can enter through the opening 12 and enter one side of the sliding cavity 11 through the connecting hole 31, then enter the other side of the sliding cavity 11 through the ventilation groove 211 and be discharged through the outlet 13.

[0046] In this water-gas linkage valve, the limiting part 212 slides against the inner wall of the sliding cavity 11 of the valve seat 1, allowing the valve 2 to slide coaxially within the sliding cavity 11 of the valve seat 1. This facilitates the coaxial connection between the valve 2 and the valve seat 1, thereby improving control accuracy and sealing performance. Simultaneously, by opening a venting groove 211 on the outer wall of the valve 2, the gas can enter the outlet 13 from one side of the sliding cavity 11 through the venting groove 211. The linkage shaft 8 abuts against the end of the main body 21, enabling the linkage shaft 8 to drive the valve to open the outlet 13. The linkage shaft 8 does not need to be coaxially installed with the valve 2 and the valve seat 1, reducing assembly difficulty and improving assembly efficiency.

[0047] In this embodiment, a connecting part is provided between the main body 21 and the plug 22, and a sealing ring 6 is sleeved on the connecting part.

[0048] Optionally, such as Figure 3 As shown, multiple limiting parts 212 are provided on the periphery of the main body 21 in the circumferential direction, and ventilation grooves 211 are formed between adjacent limiting parts 212. By providing multiple limiting parts 212, multiple ventilation grooves 211 can be formed, and the gas can pass through multiple ventilation grooves 211 at the same time, thereby improving the efficiency of gas intake.

[0049] Optionally, the bottom surface of the vent groove 211 is set to an arc shape, that is, the vent groove 211 is an arc groove. By setting the bottom surface of the vent groove 211 to an arc shape, stress concentration of valve 2 can be avoided, so as to ensure the structural stability of valve 2.

[0050] Optionally, such as Figures 3-4 As shown, when valve 2 moves toward and compresses elastic element 4, plug 22 gradually moves out of outlet 13. During this process, the distance between plug 22 and the inner wall of outlet 13 gradually increases. This design allows the gas flow to gradually increase to adapt to the water flow rate. Specifically, towards the direction of the linkage shaft 8, plug 22 includes a first straight section 221, a first inclined section 222, a second straight section 223, and a second inclined section 224 distributed sequentially. The diameter of the first straight section 221 is larger than the diameter of the second straight section 223, and the diameters of the first inclined section 222 and the second inclined section 224 gradually decrease. By setting plug 22 to the above structure, the gas flow rate adjustment is more precise, and the gas flow rate can be accurately controlled to make the gas flow rate and water flow rate more reasonably matched, achieving fine adjustment. That is, the setting of the first straight section 221 and the second straight section 223 ensures that the gas flow rate does not increase completely linearly, avoiding the gas flow rate from increasing too quickly.

[0051] In this embodiment, the ventilation groove 211 is provided on the outer wall of the main body 21.

[0052] Furthermore, towards the direction of the linkage shaft 8, the second inclined section 224 includes inclined section one 2241 and inclined section two 2242 distributed sequentially. The angle between the inclined surface of inclined section one 2241 and the axis of the plug 22, the angle between the inclined surface of the first inclined section 222 and the axis of the plug 22, and the angle between the inclined surface of inclined section two 2242 and the axis of the plug 22 increase sequentially. Through the above arrangement, the gas flow rate increases in the first inclined section 222, then the rate of increase decreases in the second straight section 223, and then, as the water flow rate increases, the gas flow rate increases again by gradually increasing the inclination angle to match the increase in water flow rate.

[0053] Optionally, the valve 2 further includes a first limiting post 23 disposed at the end of the main body 21 opposite to the air outlet 13 and a second limiting post 24 disposed at the first limiting post 23. The outer diameter of the second limiting post 24 is smaller than the outer diameter of the first limiting post 23, that is, the diameter of the second limiting post 24 is smaller than the diameter of the first limiting post 23. The elastic element 4 includes an outer spring 41 and an inner spring 42. The outer spring 41 is sleeved on the first limiting post 23 and elastically abuts against the main body 21 and the spring seat 3. The inner spring 42 is sleeved on the second limiting post 24 and elastically abuts against the first limiting post 23 and the spring seat 3, that is, the inner spring 42 is located inside the outer spring 41. In this structure, the inner spring 42 and the outer spring 41 can be selected with different wire diameters to achieve a more reasonable elastic force. That is, through the joint action of the inner spring 42 and the outer spring 41, the elastic force applied to the valve 2 is more reasonable.

[0054] Optionally, such as Figures 4-5 As shown, the sealing ring 6 has an annular protrusion 61 on the side facing the bottom of the sliding cavity 11. The annular protrusion 61 can abut against the bottom of the sliding cavity 11, making the sealing performance stronger.

[0055] Optionally, the valve body 5 is provided with an installation cavity, the valve seat 1 is installed in the installation cavity, and the installation cavity and the sliding cavity 11 are connected through a connecting hole 31 on the spring seat 3 provided at the opening 12; the valve body 5 is also provided with a pressure measuring port 511 connected to the installation cavity, through which the pressure in the installation cavity and the sliding cavity 11 can be measured. By connecting the installation cavity and the sliding cavity 11, the pressure in the installation cavity and the sliding cavity 11 is the same. The pressure measuring port 511 is connected to the installation cavity, so that the pressure in the installation cavity can be measured by the pressure measuring port 511, thereby obtaining the pressure in the sliding cavity 11, so as to realize real-time monitoring of the pressure in the sliding cavity 11.

[0056] Specifically, such as Figures 6-8 As shown, a gap 53 is provided between the inner wall of the mounting cavity and the outer wall of the valve seat 1, and a connecting groove 512 communicating with the gap 53 is provided at the bottom of the mounting cavity near the spring seat 3. The connecting groove 512 communicates with the opening 12, that is, the connecting groove 512 communicates with the connecting hole 31. By setting the gap 53, the pressure in the sliding cavity 11 can be transmitted to the gap 53. The pressure measuring port 511 communicates with the gap 53, that is, the pressure measured by the pressure measuring port 511 is the pressure in the mounting cavity and the sliding cavity 11. The structural design is simple.

[0057] Optionally, a retaining ring is provided on the inner wall of the sliding cavity 11, and the side of the spring seat 3 away from the elastic element 4 abuts against the retaining ring to limit the spring seat 3. With this design, the valve seat 1, valve 2, spring seat 3, and elastic element 4 can be assembled into a single module, which facilitates the improvement of the assembly efficiency of the subsequent water-air linkage valve.

[0058] Optionally, a sealing ring 7 is provided between the inner wall of the mounting cavity and the outer side of the valve seat 1. The sealing ring 7 is located on the side of the valve seat 1 away from the opening 12, that is, between the opening 12 and the outlet 13. By providing the sealing ring 7, the gap 53 between the inner wall of the mounting cavity and the valve seat 1 is sealed, so as to ensure the pressure in the mounting cavity is stable.

[0059] In this embodiment, the valve housing 5 includes a first housing 51 and a second housing 52 connected to each other. The first housing 51 and the second housing 52 are interlocked to form an installation cavity. The pressure measuring port 511 is disposed in the first housing 51, and the sealing ring 7 is disposed between the inner wall of the second housing 52 and the outer wall of the valve seat 1.

[0060] This embodiment also provides a gas device, including the water-gas linkage valve mentioned above. By setting the water-gas linkage valve, the assembly is simplified, the assembly efficiency is improved, and the processing precision and processing cost of each component are reduced.

[0061] In the specific implementation of the above embodiments, the technical features can be combined in any non-contradictory way. For the sake of brevity, not all possible combinations of the above technical features are described. However, as long as the combination of these technical features is not contradictory, it should be considered to be within the scope of this specification.

[0062] The specific embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A water-gas linkage valve, comprising a valve body (5), wherein the valve body (5) is provided with a valve seat (1), a valve (2), an elastic element (4), and a linkage shaft (8), characterized in that, The valve seat (1) has a sliding cavity (11) with an opening (12) at one end of the valve seat (1). The bottom of the sliding cavity (11) has an air outlet (13) that extends through the other end of the valve seat (1). The valve (2) is coaxially disposed in the sliding cavity (11). The valve (2) includes a main body (21) and a sealing element disposed at the end of the main body (21) facing the air outlet (13). The main body (21) has a limiting part (212) formed on its periphery. The limiting part (212) slides against the inner wall of the sliding cavity (11). The blocking part is spaced apart from the inner wall of the sliding cavity (11). The valve (2) can drive the blocking part to block the air outlet (13) under the elastic force of the elastic member (4). The linkage shaft (8) abuts against the end of the blocking part away from the main body (21). The outer wall of the main body (21) is provided with at least one ventilation groove (211), and the ventilation groove (211) passes through both ends of the main body (21) along the axial direction of the sliding cavity (11).

2. The water-gas linkage valve according to claim 1, characterized in that, The main body (21) is provided with a plurality of limiting parts (212) distributed circumferentially, and the ventilation groove (211) is formed between adjacent limiting parts (212).

3. The water-gas linkage valve according to claim 1, characterized in that, The sealing part includes a sealing ring (6) and a plug (22). Under the elastic action of the elastic member (4), the sealing ring (6) abuts against the bottom of the sliding cavity (11) and blocks the air outlet (13); the plug (22) is inserted into the air outlet (13), and there is a gap between the plug (22) and the inner wall of the air outlet (13). In the direction closer to the linkage shaft (8), the plug (22) includes a first straight section (221), a first inclined section (222), a second straight section (223), and a second inclined section (224) distributed in sequence. The diameter of the first straight section (221) is larger than the diameter of the second straight section (223), and the diameters of the first inclined section (222) and the second inclined section (224) gradually decrease.

4. The water-gas linkage valve according to claim 3, characterized in that, In the direction closer to the linkage shaft (8), the second inclined segment (224) includes inclined segment one (2241) and inclined segment two (2242) distributed in sequence; The angle between the inclined surface of the first inclined segment (2241) and the axis of the plug (22), the angle between the inclined surface of the first inclined segment (222) and the axis of the plug (22), and the angle between the inclined surface of the second inclined segment (2242) and the axis of the plug (22) increase sequentially.

5. The water-gas linkage valve according to claim 1, characterized in that, The valve (2) further includes a first limiting post (23) disposed on the end of the main body (21) opposite to the air outlet (13) and a second limiting post (24) disposed on the first limiting post (23), wherein the outer diameter of the second limiting post (24) is smaller than the outer diameter of the first limiting post (23); The elastic element (4) includes an outer spring (41) and an inner spring (42). The outer spring (41) is sleeved on the first limiting post (23) and elastically abuts against the main body (21) and the end of the valve seat (1) where the opening (12) is provided. The inner spring (42) is sleeved on the second limiting post (24) and elastically abuts against the first limiting post (23) and the end of the valve seat (1) where the opening (12) is provided.

6. The water-gas linkage valve according to claim 1, characterized in that, The water-air linkage valve also includes a spring seat (3), which is disposed in the sliding cavity (11) and close to the opening (12). The elastic element (4) is compressed and disposed between the spring seat (3) and the valve (2). The spring seat (3) is provided with a connecting hole (31) for ventilation.

7. The water-gas linkage valve according to claim 6, characterized in that, The inner wall of the sliding cavity (11) is provided with a retaining ring, and the side of the spring seat (3) away from the elastic element (4) abuts against the retaining ring.

8. The water-air linkage valve according to any one of claims 1-7, characterized in that, The valve housing (5) is provided with an installation cavity, the valve seat (1) is disposed in the installation cavity, and the installation cavity and the sliding cavity (11) are connected through the opening (12).

9. The water-gas linkage valve according to claim 8, characterized in that, A sealing ring (7) is provided between the inner wall of the mounting cavity and the outer wall of the valve seat (1), and the sealing ring (7) is located between the opening (12) and the air outlet (13).

10. A gas-fired device, characterized in that, Includes the water-air linkage valve as described in any one of claims 1-9.

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