A gas valve

Abstract

The present application optimizes the design of the gas valve, which comprises a core component limited in a mounting hole and sealingly matched with a valve body, the core component is provided with a second valve port, when a sealing plug abuts against a first valve port, an axial spacing is formed between the sealing plug and the second valve port, and a second flow passage, a third flow passage and a back pressure cavity are communicated; when the sealing plug abuts against the second valve port, an axial spacing is formed between the sealing plug and the first valve port, a first flow passage, the second flow passage and the back pressure cavity are communicated, a lever mechanism is additionally arranged in the pressure difference device of the gas valve, and the back pressure cavity can act on the lever mechanism through a diaphragm; when applied to a large valve port and large flow occasion, the opening valve capacity can be relatively improved.

Description

[Technical Field]

[0001] This application relates to the fields of electromagnetic control and gas control technology, and in particular to a gas valve. [Background Technology]

[0002] Two-stage solenoid valves are used in gas valves to open and close gas passages to ensure the safety of gas use. However, the pressure exerted on the valve plug of the solenoid valve by the inlet pressure is relatively large, requiring a large electromagnetic force to open. For those skilled in the art, how to optimize the design of gas valves and enhance their opening capacity when applied to large valve ports and high flow rates is an urgent technical problem to be solved. [Summary of the Invention]

[0003] The purpose of this invention is to provide a gas valve that can relatively enhance the valve opening capability when applied to applications with large valve openings and high flow rates.

[0004] This invention provides a gas valve, including a valve body, an electromagnetic drive device, and a differential pressure device. The valve body is provided with an installation channel, a first flow channel, a second flow channel, and a third flow channel. The gas valve is provided with an inlet chamber, an outlet chamber, and a back pressure chamber. The valve body includes a first valve port portion, a portion of the surface of the first valve port portion forming a part of the channel wall of the first flow channel. The first flow channel communicates with the inlet chamber, the second flow channel communicates with the back pressure chamber, and the third flow channel communicates with the outlet chamber.

[0005] The electromagnetic drive device includes a moving core assembly and a core component. The moving core assembly includes a moving core component and a sealing plug connected to the moving core component. The core component is at least partially located in the mounting channel and is sealed to the valve body. The core component is provided with a second valve port. The sealing plug is axially displaced relative to the core component to abut against the first valve port or against the second valve port.

[0006] The differential pressure device includes a diaphragm, a valve plug, a connecting rod connected to the valve plug, and a lever mechanism. The valve body is provided with a third valve port. The lever mechanism includes a lever body and a fixed frame. The diaphragm can directly or indirectly abut against the lever body. The lever body can directly or indirectly abut against the connecting rod. The fixed frame is fixedly connected to the valve body. The lever body can swing relative to the fixed frame.

[0007] The present invention also provides a gas valve, characterized in that it includes a valve body, an electromagnetic drive device, and a differential pressure device. The valve body is provided with an installation channel, a first flow channel, a second flow channel, and a third flow channel. The gas valve is provided with an inlet cavity and a back pressure cavity. The valve body includes a first valve port portion, a portion of the surface of the first valve port portion forming a part of the channel wall of the first flow channel. The first flow channel communicates with the inlet cavity, the second flow channel communicates with the back pressure cavity, and the third flow channel is connected to an external mother flame device.

[0008] The electromagnetic drive device includes a moving core assembly and a core component. The moving core assembly includes a moving core component and a sealing plug connected to the moving core component. The core component is at least partially located in the mounting channel and is sealed to the valve body. The core component is provided with a second valve port. The sealing plug is axially displaced relative to the core component to abut against the first valve port or against the second valve port.

[0009] The differential pressure device includes a diaphragm, a valve plug, a connecting rod connected to the valve plug, and a lever mechanism. The valve body is provided with a third valve port. The lever mechanism includes a lever body and a fixed frame. The diaphragm can directly or indirectly abut against the lever body. The lever body can directly or indirectly abut against the connecting rod. The fixed frame is fixedly connected to the valve body. The lever body can swing relative to the fixed frame.

[0010] This invention optimizes the design of the gas valve structure, including a valve body, an electromagnetic drive device, and a differential pressure device. The valve body has a first flow channel, a second flow channel, and a third flow channel. The first flow channel is connected to the inlet chamber, the second flow channel is connected to the back pressure chamber, and the third flow channel is connected to the outlet chamber or an external ignition device. The differential pressure device is equipped with a lever mechanism. The diaphragm can directly or indirectly abut against the lever body, and the lever body can directly or indirectly abut against the connecting rod. The lever body can swing relative to the fixed frame. Through the cooperation and connection between the first, second, and third flow channels and the electromagnetic drive device, combined with the function of the lever mechanism, the valve opening capacity can be relatively enhanced when applied to large valve opening and high flow rate applications. [Attached Image Description]

[0011] Figure 1 A cross-sectional view of the overall structure of the gas valve according to a first embodiment of the present invention;

[0012] Figure 2 for Figure 1 Enlarged cross-sectional schematic diagram of the electromagnetic drive device and part of the valve body passage structure.

[0013] Figure 3A three-dimensional structural schematic diagram of the core component of the electromagnetic drive device for the gas valve provided by the present invention;

[0014] Figure 4 for Figure 3 A three-dimensional cross-sectional structural diagram of the core component;

[0015] Figure 5 A three-dimensional structural schematic diagram of the lever mechanism of the gas valve provided by the present invention;

[0016] Figure 6 A three-dimensional schematic diagram from one side of the lever body of the lever mechanism of the gas valve provided by the present invention.

[0017] Figure 7 A three-dimensional schematic diagram of the lever body of the lever mechanism of the gas valve provided by the present invention from another side view.

[0018] Figure 8 A cross-sectional schematic diagram of a gas valve structure with a lever mechanism provided by the present invention;

[0019] Figure 9 A cross-sectional view of the overall structure of a second embodiment of the gas valve provided by the present invention;

[0020] Figure 10 A cross-sectional view of the overall structure of a third embodiment of the gas valve provided by the present invention;

[0021] Figure 11 A partial cross-sectional schematic diagram of a gas valve provided by the present invention, which includes an electromagnetic drive device, a differential pressure device, and a lever mechanism.

[0022] Figure 12 Overall structural cross-sectional view of another embodiment of the gas valve provided by the present invention

[0023] Some of the attached figure labels:

[0024] Gas valve 1, electromagnetic drive device 20, auxiliary electromagnetic drive device 30, electronically controlled pressure regulating device 40, differential pressure device 50, main differential pressure device 60, valve body 10, inlet 1A, outlet 1B, inlet cavity 11A, outlet cavity 11B, first valve port 10a, second valve port 2216, third valve port 10b, fourth valve port 10c, fifth valve port 10d, first flow channel 11, second flow channel 12, third flow channel 13, fourth flow channel 14, fifth flow channel 15, pressure relief channel 17, mounting hole 18;

[0025] Moving core assembly 21, moving core component 211, connecting rod 2111, sealing plug 212, core component 22, main body 221, sealing element 222, body part 2211, rib 2212, first annular rib 2213, second annular rib 2214, second valve port 2216;

[0026] Second moving core component 311, second sealing plug 312, pressure regulating device 40, adjusting mechanism 41, piston diaphragm assembly 42, moving core valve stem component 43, external threaded engagement mechanism 44, internal threaded engagement mechanism 45, adjusting rod 46;

[0027] Main valve plug 61, main diaphragm 62, main back pressure chamber 63, main valve stem 64, valve plug part 51, connecting rod 52, diaphragm 53, elastic element 54, back pressure chamber 55

[0028] Lever mechanism 80, lever body 81, flange portion 811, folded edge portion 812, first mating hole 813, support shaft 82, fixing bracket 83, mounting portion 831, screw hole 8311, guide portion 832, extension portion 833, extension plate 8331, second mating hole 83311

Detailed Implementation Methods

[0029] To enable those skilled in the art to better understand the technical solutions provided in this application, the technical solutions of this application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that the main invention of the gas valve provided in this application lies in the combination of an electromagnetic drive device and a differential pressure device, combined with the operation of a lever mechanism, to improve the valve opening capability. A small electromagnetic valve is used to indirectly control the back pressure of the differential pressure device, and the coordinated operation of the lever mechanism enables smooth valve opening even under large-diameter valves. As for other mechanisms, such as the auxiliary electromagnetic drive device and the pressure regulating device, they can be adaptively adjusted according to the application requirements of the system.

[0030] First Implementation Method

[0031] This application provides a gas valve, including a valve body 10, an electromagnetic drive device 20, and a differential pressure device 50. The valve body is provided with an installation channel 18, a first flow channel 11, a second flow channel 12, and a third flow channel 13. The gas valve is provided with an inlet chamber 11A and an outlet chamber 11B. The inlet chamber 11A is connected to the inlet 1A, and the outlet chamber 11B is connected to the outlet 1B. The valve body 10 includes a first valve port 10a, which can be integrally formed on the valve body or separately disposed from the valve body and fixedly connected by welding or other means. A portion of the surface of the first valve port 10a forms part of the channel wall of the first flow channel 11. In this embodiment, the first valve port 10a is... One side of the first flow channel 11 is connected to the inlet cavity 11A, and the other side port of the first flow channel 11 forms at least a portion of the first valve port 10a. The third flow channel 13 is connected to the outlet cavity 11B. The electromagnetic drive device 20 includes a moving core assembly 21 and a core component 22. The moving core assembly 21 includes a moving core component 211 and a sealing plug 212 connected to the moving core component 211. The core component 22 is limited to the mounting hole 18 and is sealed to the valve body 10. The core component 22 is provided with a second valve port 2216. The sealing plug 212 is located inside the core component 22 and can be axially displaced relative to the core component 22.

[0032] The gas valve is provided with a back pressure chamber 55. The back pressure chamber 55 and the lever mechanism 80 are located on different sides of the diaphragm 53. The back pressure chamber 55 is closer to the inlet chamber 11A than the outlet chamber 11B. The differential pressure device 50 includes a valve plug part 51. The valve body is also provided with a third valve port part 10b. The valve plug part 51 can approach or move away from the third valve port part 10b. The lever mechanism 80 includes a lever body 81 and a fixed frame 82. The fixed frame 82 is fixedly connected to the valve body. The lever body 81 can swing relative to the fixed frame around the fulcrum.

[0033] When the sealing plug 212 abuts against the first valve port 10a, there is an axial gap between the sealing plug 212 and the second valve port 2216, the second flow channel 12, the third flow channel 13 and the back pressure chamber 55 are connected, and the valve plug 51 abuts against the third valve port 10b.

[0034] When the sealing plug 212 abuts against the second valve port 2216, there is an axial gap between the sealing plug 212 and the first valve port 10a. The first flow channel 11, the second flow channel 12 and the back pressure chamber 55 are connected. The inlet pressure enters the core cavity of the core component 22 through the first flow channel 11 and is connected to the second flow channel. The pressure in the back pressure chamber 55 increases and acts on the diaphragm 53. The diaphragm 53 abuts directly or indirectly against the lever body 81. The diaphragm 53 acts on the lever body 81. The lever body 81 abuts directly or indirectly against the connecting rod 52. The lever body 81 applies a force to the connecting rod 52 to open the third valve port 10b.

[0035] This application optimizes the design of the gas valve structure, using an electromagnetic drive device and a differential pressure device as the first safety control mechanism of the gas valve. Compared with the two-stage electromagnetic valve structure in the prior art, the force exerted by the gas inlet pressure on the sealing plug is relatively small, enabling miniaturization of the coil component of the electromagnetic drive device. At the same time, by adding a lever mechanism in the differential pressure device, the third valve port can be opened with even less force through the lever arm. In large-diameter, high-flow-rate applications, the small electromagnetic drive device, the related components of the differential pressure device, and their lever mechanism work together to enhance the valve opening capability, making it easier for the valve plug 51 to open the third valve port 10b.

[0036] The following reference Figure 1-8The gas valve structure of the first embodiment provided in this application is described in detail. The gas valve includes a gas inlet 1A and a gas outlet 1B, and is provided with an inlet chamber 11A and an outlet chamber 11B. The inlet chamber 11A is close to the inlet 1A, and the outlet chamber 11B is close to the outlet 1B. The inlet 1A is provided with a first filter element to filter impurities in the gas entering the valve body 10, and the outlet 1B is provided with a second filter element to filter impurities and prevent the gas from carrying impurities into the combustion chamber. The gas valve includes an electromagnetic drive device 20, a secondary electromagnetic drive device 30, an electronically controlled pressure regulating device 40, a differential pressure device 50, and a primary differential pressure device 60. The electromagnetic drive device 20 is fixedly connected to the valve body 10, and the valve body 10 is provided with... The valve body 10 is further provided with a first flow channel 11, a second flow channel 12, a third flow channel 13, a fourth flow channel 14, a fifth flow channel 15, a sixth flow channel, and a pressure relief channel 17. The electromagnetic drive device 20 includes a moving core assembly 21 and a core component 22. The moving core assembly 21 includes a moving core component 211 and a sealing plug 212. The moving core component 211 is provided with a connecting rod 2111. The sealing plug 212 can be made of rubber and is connected to the connecting rod 2111 by flexible extrusion deformation. The core component 22 is entirely confined within the installation channel 18 and directly or indirectly abuts against the electromagnetic drive device 20 and the valve. Between the body 10, the electromagnetic drive device 20 includes a sleeve located on the outer periphery of the moving core component 211. In this embodiment, the core component 22 directly or indirectly abuts against the bottom wall of the sleeve and the mounting channel 18. It should be noted that the upper end of the core component 22 may also have a preset distance from the sleeve. The core component 22 can be press-fitted with the valve body 10 to ensure that the core component 22 is entirely confined within the mounting channel 18. The core component 22 achieves a sealing fit with the valve body through a sealing member 222, which abuts against the core component 22 and the valve body. The sealing plug 212 is located in the core cavity of the core component 22, and the sealing plug 212 can be positioned relative to the core component 211. 2. When axial displacement occurs, one side of the first flow channel 11 connects to the inlet cavity 11A, and the other side port of the first flow channel 11 forms a first valve port 10a. The core component 22 is provided with a second valve port 2216. The first valve port 10a and the second valve port 2216 are arranged facing each other. When the sealing plug 212 abuts against the first valve port 10a, the sealing plug 212 moves away from the second valve port 2216, and there is an axial distance between the sealing plug 212 and the second valve port 2216. When the sealing plug 212 abuts against the second valve port 2216, the sealing plug 212 moves away from the first valve port 10a, and there is an axial distance between the sealing plug 212 and the first valve port 10a.

[0037] One side of the second flow channel 12 is connected to the core cavity, and the other side is connected to the back pressure cavity 55 of the gas valve. The gas valve includes a first base plate 100 and a second base plate 200. The first base plate 100 and the diaphragm 53 of the differential pressure device 50 are sealed together to form the back pressure cavity 55. The back pressure cavity 55 is closer to the inlet cavity 11A than the outlet cavity 11B. The second base plate 200 and the main diaphragm 62 of the main differential pressure device 60 are sealed together to form the main back pressure cavity 63. The main back pressure cavity 63 is closer to the outlet cavity 11B than the inlet cavity 11A. One side of the third flow channel 13 is connected to the mounting hole cavity 181, and the other side is connected to the outlet cavity 11B.

[0038] The structure of the core component 22 is described below. The core component 22 includes a main body 221 and a sealing element 222. The main body 221 includes a body portion 2211, a rib portion 2212, a first annular rib 2213, and a second annular rib 2214. The rib portion 2212 extends radially outward from the body portion 2211 and is arranged circumferentially along the body portion. The rib portion 2212 includes a horizontal portion 22121 and an extension portion 22122 extending axially from the horizontal portion 22121. One end of the extension portion 22122 is connected to the horizontal portion, and the other end of the extension portion 22122 is connected to the first annular rib 2213. A mounting groove 2215 is recessed between the first annular rib 2213 and the second annular rib 2214. The sealing element 222 is partially located in the mounting groove 2215. The main body 221 also includes a second valve. The second valve port 2216 extends axially downward from the body 2211 and is provided with a second valve port 22161. In this embodiment, the core component is provided with a sealing element 222, and the sealing fit with the valve body is achieved through the sealing element 222. It should be noted that in other embodiments, the mounting groove of the core component 22 can be omitted, and the side wall of the mounting channel is provided with a mounting groove. The sealing element is located in the mounting groove, and the core component can also achieve a sealing fit with the valve body. The gas valve is also provided with a flow passage. The surface of the body 2211 located between two adjacent ribs 2212 forms part of the inner wall of the flow passage, and the side wall of the mounting channel 18 corresponding to the surface forms at least another part of the flow passage. One side of the third flow passage 13 is connected to the flow passage.

[0039] The following reference Figure 5-7 Combination Figure 1The structure of the lever mechanism of the differential pressure device of the gas valve provided by the present invention is described. The lever mechanism 80 includes a lever body 81, a support shaft 82, and a fixing frame 83. The fixing frame 83 includes a mounting part 831 and an extension part 833. The mounting part 831 includes a plate-shaped part and a guide part 832. The guide part 832 protrudes from the surface of the plate-shaped part and has a through hole. The connecting rod 52 passes through the through hole. The guide part 832 provides guidance for the actuation of the connecting rod 52. The connecting rod 52 includes a first end and a second end located on both sides. The first end is connected to the valve plug part 51. The second end includes a stop part and a step part. The stop part can abut against the lever body 81. An elastic member 54 is located on the outer periphery of the guide part 832. The elastic member 54 abuts between the step part and the plate-shaped part. Alternatively, in other embodiments, the elastic member 54 may abut between the step part and the valve body 10. The plate-shaped part has a screw hole 8311 for screw engagement. The fixing part 83 and the valve body 10 are connected by screws. The extension portion 833 is axially protruding from the plate-shaped portion of the mounting portion 831. The extension portion 833 includes an extension plate 8331, with a preset distance between adjacent extension plates 8331. A portion of the lever body 81 is located within the preset distance. The extension plate 8331 is provided with a first mating hole 83311 that mates with the support shaft 82. The support shaft 82 passes through the first mating hole 83311. The lever body 81 includes a body portion, a flange portion 811, and a flanged portion 812. One side is provided with a flange portion 811, and the other side is provided with a second mating hole 813 that mates with the support shaft 82. The support shaft 82 passes through the second mating hole 813. The flange portion 812 protrudes from the main body to enhance the strength of the lever body. The flange portion 811 protrudes toward the diaphragm 53 and can abut against the diaphragm 53. It should be noted that the flange portion 811 can directly abut against the diaphragm 53 or a third part can be added to achieve indirect abutment between the flange portion and the diaphragm.

[0040] When the gas valve is open, the electromagnetic drive device 20 is energized by the coil component, causing the moving core assembly 21 to move axially upward. The sealing plug 212 moves axially upward relative to the core component 22, and the sealing plug 212 abuts against the second valve port 2216. Gas enters the inlet chamber 11A from the inlet 1A, passes through the first flow channel 11 and the first valve port 10a, and then enters the core cavity. Gas then enters the back pressure chamber 55 from the second flow channel 12. The back pressure chamber 55 is pressed against the diaphragm 53 by the inlet pressure, and the diaphragm 53 and the lever... The flange 811 of the lever body 81 directly or indirectly abuts against the lever. The lever body 81 swings upward around the pivot 82, applying force to the connecting rod 52 to abut against it. It should be noted that the lever body can directly abut against the connecting rod, or a third component can be added to achieve indirect abutment. The valve plug 51 connected to the connecting rod 52 is moved away from the third valve port 10b by the force, the third valve port 10b opens, and the gas flows out from the third valve port 10b to the fourth flow channel 14. The elastic element 5... 4 is in a state of further compression; when the gas valve switches from the open state to the closed state, the excitation effect of the coil component of the electromagnetic drive device 20 is reduced, the moving core assembly 21 moves axially downward, the sealing plug 212 moves axially downward relative to the core component 22, the sealing plug 212 abuts against the first valve port 10a, the gas cannot pass through the inlet 11A and enter the core cavity 22A through the first flow channel 11, the second flow channel 12, the core cavity 11A, and the third flow channel 13 are connected, the gas pressure in the back pressure cavity 55 flows from the second flow channel 12 to the outlet 11B through the third flow channel 13 for pressure relief, the pressure of the inlet pressure is relatively larger than the pressure of the back pressure cavity, under the action of the restoring force of the elastic element 54 and the cavity pressure, the valve plug 51 abuts against the third valve port 10b. It should be noted that in this embodiment, the other side of the third flow channel 13 is connected to the outlet 11B, and the outlet 11B is connected to the outlet 1B. It should be noted that in other embodiments, the third flow channel 13 can also be connected to the mother flame device.

[0041] It should be noted that all of this is to enable the lever mechanism to perform its valve-opening function better. (Refer to...) Figure 11 Combination Figure 1 , Figure 5-7 As shown, the diaphragm 53 is defined to have a first abutting position when it cooperates with the flange 811, and the diaphragm 53 is defined to have a second abutting position when it cooperates with the connecting rod 54. The position of the support shaft 82 is defined as the fulcrum position. The distance between the first abutting position and the second abutting position is defined as L1, and the distance between the second abutting position and the fulcrum position is defined as L2. Then, 1.5≤(L1+L2) / L2≤3 is satisfied. The lever arm action makes it easier and more convenient to open the valve.

[0042] The structure of the electrically controlled pressure regulating device 40 and the main differential pressure device 60 of the gas valve provided in this embodiment is described below. The electrically controlled pressure regulating device 40 is fixedly connected to the valve body 10 and includes an adjusting mechanism 41, a piston diaphragm assembly 42, a moving core valve stem component 43, an external threaded engagement mechanism 44, an internal threaded engagement mechanism 45, and a limiting rod 46. The piston diaphragm assembly 42 can approach or move away from the fifth valve port 10d. The moving core valve stem component 43 is located above the stationary iron core and can approach or move away from the stationary iron core. The adjusting mechanism 41 is located inside the mounting part. The adjusting mechanism and the mounting part are threadedly engaged to form the external threaded engagement mechanism 44 of the electrically controlled pressure regulating device 40. The adjusting mechanism 41 can move circumferentially relative to the mounting part. When the gas valve is in the high-pressure outlet pressure mode, the moving core valve stem component 43 moves downward and engages with the stationary iron core. The adjusting mechanism 41 can limit the moving core valve... The displacement of the rod component 43 is used to precisely regulate the gas flow in the high-pressure outlet pressure mode. The limit rod 46 and the regulating mechanism 41 are threaded together to form the internal threaded engagement mechanism 45 of the electronically controlled pressure regulating device 40. The limit rod 46 can move axially relative to the regulating mechanism 41. When the gas valve is in the low-pressure outlet pressure mode, the moving core valve rod component 43 moves axially upward and can abut against the limit rod 46. The limit rod 46 can control the axial displacement of the moving core valve rod component 43 to further regulate the gas flow in the low-pressure outlet pressure mode, thereby achieving a more precise gas regulation effect. The main differential pressure device 60 includes a main valve plug 61, a main valve rod 64 connected to the main valve plug 61, and a main diaphragm 62. The gas valve is provided with a main back pressure chamber 63. The second base plate 200 and the main diaphragm 62 of the main differential pressure device 60 are sealed together to roughly form the main back pressure chamber 63.

[0043] The operating principle of the gas valve provided in this embodiment is described below. When the gas valve is in the open mode, the electromagnetic drive device 20 is energized by the coil component, and the moving core assembly 21 moves axially upward. The sealing plug 212 has a preset distance from the first valve port 10a, and the sealing plug 212 remains against the second valve port 2216. At this time, the first flow channel 11 is not connected to the third flow channel 13, and the second flow channel 12 is not connected to the third flow channel. The second moving core assembly 311 is also energized by the coil component and moves axially upward. The second sealing plug 312 leaves the fourth valve port. Gas enters the inlet chamber 11A from the inlet 11A through the filter of the first filter element, and flows into the back pressure chamber through the first flow channel 11 and the core cavity from the second flow channel 12. 55. Under the pressure of the gas inlet, the back pressure chamber 55 pushes against the diaphragm 53. The diaphragm 53 abuts against the flange 811 of the lever body 81. The lever body 81 swings upward around the pivot 82, applying force to the connecting rod 52 to abut against it. The valve plug 51 connected to the connecting rod 52 is pressed away from the third valve port 10b, and the third valve port 10b opens. Gas flows out from the third valve port 10b to the fourth flow channel 14. Gas enters the fifth flow channel 15 and the sixth flow channel through the fourth valve port. When the outlet pressure is at a higher pressure mode, the moving core valve rod assembly 43 moves downward to engage with the stationary iron core. The piston diaphragm assembly 42 moves downward to approach the fifth valve port 10d. A portion of the gas passes through the pressure relief channel. 17 flows out from the outlet 11B. One side of the fifth flow channel 15 forms the fourth valve port, and the other side is connected to the main back pressure chamber 63. One side of the sixth flow channel 16 forms the fifth valve port 10d, and the other side is connected to the fifth flow channel. Under the downward action of the piston diaphragm assembly 42, the gas pressure in the fifth flow channel 15 and the sixth flow channel increases, acting on the main back pressure chamber 63. The main back pressure chamber 63 is pressured to push against the main diaphragm 62, and the main diaphragm 62 abuts against the main valve stem 64. Then the main valve plug 61 moves axially upward to open the main valve port 10e. The gas flows out of the main valve port 10e and out of the outlet 1B to flow into the combustion chamber. When the gas valve is in the closed mode, the electromagnetic drive device 20, the auxiliary electromagnetic drive device 30, and the electronic pressure regulating device... The magnetic force of the coil components is reduced. There is an axial gap between the sealing plug 212 of the electromagnetic drive device 20 and the second valve port 2216. The sealing plug 212 abuts against the first valve port 10a to prevent gas from entering the gas valve. The second sealing plug 312 abuts against the fourth valve port. The valve plug 51 of the differential pressure device 50 abuts against the third valve port 10b. The main valve plug 61 of the main differential pressure device 60 abuts against the main valve port 10e. At this time, the first flow channel 11 is not connected to the third flow channel 13. The second flow channel 12, the core cavity, the second valve port 22161, the flow channel and the third flow channel 13 are connected. The gas in the back pressure chamber 55 is depressurized through the third flow channel 13 to maintain the gas pressure of the inlet pressure and the back pressure chamber roughly balanced.

[0044] This application optimizes the design of the gas valve structure, using the electromagnetic drive device 20 and the differential pressure device 50 as the first safety control mechanism of the gas valve, and the auxiliary electromagnetic drive device 30 as the second installation control mechanism. The two installation control mechanisms work together to ensure the safety of gas use. Through the setting of the first flow channel, the second flow channel, and the third flow channel and their interconnection, the coil component of the electromagnetic drive device 20 can be relatively miniaturized. This allows the small electromagnetic drive device to drive the opening of the larger diameter valve port 10b. At the same time, in conjunction with the lever mechanism of the differential pressure device 50, in large-diameter, high-flow applications, the small electromagnetic drive device, the related components of the differential pressure device, and its lever mechanism work together to enhance the valve opening capability, making it easier to open the third valve port 10b through the valve plug 51.

[0045] Second Implementation Method

[0046] Reference Figure 9 Combination Figure 1As shown, the gas valve of the second embodiment provided in this application differs from the gas valve of the first embodiment in that the pressure regulating device is a mechanical pressure regulating device. The mechanical pressure regulating device 40' includes a diaphragm sealing assembly, an adjusting nut 42', and a compression spring 43'. Through the threaded engagement between the adjusting nut 42' and the housing 41', the adjusting nut can move axially relative to the housing, so that the diaphragm sealing assembly can approach or move away from the fifth valve port 10d. When the gas valve is in the open mode, the electromagnetic drive device 20 is energized by the coil component, and the moving core assembly 21 moves axially upward. There is an axial gap between the sealing plug 212 and the first valve port 10a, and the sealing plug 212 abuts against the second valve port 2216. At this time, the first flow... The passage 11 is not connected to the third passage 13, and the second passage 12 is not connected to the third passage. The second moving core component 311 is also axially moved upward under the energizing effect of the coil component. The second sealing plug 312 leaves the fourth valve port. The gas enters the inlet chamber 11A through the filter of the first filter element, passes through the first passage 11 and the core cavity 22A, and flows into the back pressure chamber 55 from the second passage 12. Under the pressure of the gas inlet, the back pressure chamber 55 is pressed against the diaphragm 53. The diaphragm 53 abuts against the flange 811 of the lever body 81. The lever body 81 applies force to the connecting rod 52. The valve plug 51 connected to the connecting rod 52 is pressed away from the third valve port 10b. When valve 0b is opened, gas flows out from the third valve port 10b and into the fourth flow channel 14. The gas then enters the fifth flow channel 15 and the sixth flow channel through the fourth valve port. In the higher pressure mode, an external tool, such as a flathead screwdriver, is used to thread the adjusting nut 42' onto the housing 41'. The adjusting nut moves downwards to apply force to the compression spring 43', which in turn applies force to the diaphragm sealing assembly. The diaphragm sealing assembly is located near the fifth valve port 10d. A portion of the gas flows out from the outlet chamber 11B through the pressure relief channel 17. One side of the fifth flow channel 15 forms the fourth valve port, and the other side connects to the main back pressure chamber 63. One side of the sixth flow channel forms the... The fifth valve port 10d is connected to the fifth flow channel on the other side. The gas pressure in the fifth flow channel 15 and the sixth flow channel increases and acts on the main back pressure chamber 63. The main back pressure chamber 63 is pressured and pushes against the main diaphragm 62. The main diaphragm 62 abuts against the main valve stem 64, and then the main valve plug 61 moves axially upward to open the main valve port 10e. The gas flows out of the main valve port 10e and out of the outlet 1B to flow into the combustion chamber. In this embodiment, the technical solution of this application can be achieved by changing the electronic pressure regulating device in the embodiment to a mechanical pressure regulating device. The technical features of the electromagnetic drive device 20 and the differential pressure device 50 and their mutual cooperation and connection relationship have been described in detail in the first embodiment, and will not be repeated here.

[0047] Third Implementation Method

[0048] Reference Figure 10 Combination Figure 1 ,as well as Figure 6-8 The gas valve shown differs from the previous two embodiments in the structure of the differential pressure device 50a, particularly the arrangement of the valve plug portion 51a and the elastic element 54a. In this embodiment, the elastic element 54a and the third valve port are located on different sides of the valve plug portion 51a. The valve body includes an abutment portion 102. The valve plug portion 51a includes a small-diameter portion and a large-diameter portion. The small-diameter portion is closer to the abutment portion 102 than the large-diameter portion. The elastic element 54a is located on the outer periphery of the small-diameter portion. The abutment portion 102 abuts against one side of the elastic element 54a, and the large-diameter portion abuts against the other side of the elastic element 54a. When the sealing plug 212 abuts against the first valve port 10a, the first flow channel 11 and the third flow channel 13 are not connected, while the second flow channel 12, the core cavity, and the third flow channel 13 are connected. The back pressure chamber of the differential pressure device 50a is depressurized through the connection between the second and third flow channels. The pressure in the back pressure chamber is relatively low, and the pressure in the chamber opposite to the back pressure chamber of the diaphragm 53a is relatively high. The restoring force of the elastic element 54a keeps the valve plug 51a abutting against the third valve port 10b. When the sealing plug 212 abuts against the first valve port 10a, the first flow channel 11 and the third flow channel 13 are not connected, while the second flow channel 12, the core cavity, and the third flow channel 13 are connected. 212 opens the first valve port 10a, and the sealing plug 212 abuts against the second valve port 2216. The first flow channel 11, the core cavity, and the second flow channel are connected. The first flow channel 11 is not connected to the third flow channel 13, and the second flow channel 12 is not connected to the third flow channel 13. The intake pressure enters the second flow channel through the first flow channel and the core cavity and enters the back pressure chamber 55 of the differential pressure device 50a. The gas pressure in the back pressure chamber 55 increases and acts on the diaphragm 53a. The diaphragm 53a pushes upward against the convex part of the lever body 81. The lever body 81, with the rim 811 and the support shaft 82 as the fulcrum, swings axially upwards, applying force to the connecting rod 52. The connecting rod 52 drives the valve plug 51a to overcome the elastic force of the elastic member 54a to open the third valve port 10b. The gas enters the auxiliary electromagnetic drive device 30 through the third valve port 10b, which can also achieve the technical effect of this application. The technical features of the electromagnetic drive device 20 and the differential pressure device 50 and their mutual connection relationship have been described in detail in the first embodiment, and will not be repeated here.

[0049] This application optimizes the design of the gas valve structure, using an electromagnetic drive device and a differential pressure device as the first safety control mechanism of the gas valve. Through the above design, the force exerted by the gas inlet pressure on the sealing plug is relatively small, enabling the miniaturization of the coil component of the electromagnetic drive device. At the same time, by adding a lever mechanism in the differential pressure device, the third valve port can be opened with even less force by lever arm action. In large-diameter, high-flow-rate applications, the small electromagnetic drive device, the related components of the differential pressure device, and their lever mechanism work together to enhance the valve opening capability, making it easier for the valve plug 51 to open the third valve port 10b.

[0050] It should be noted that the directional terms such as "up," "down," etc., mentioned in this article are all based on the accompanying drawings in the specification and are introduced for ease of description. In addition, the ordinal numbers "first" and "second" mentioned in this article are also introduced for the convenience of describing the components and are not intended to restrict the order. The electromagnetic drive device structure and differential pressure device structure of the gas valve provided by the relevant technical solution, as well as the cooperation between the two, have been described in detail above. It should be noted that in fact, the examples of connecting parts are inexhaustible. This article only uses several specific embodiments for illustration. The above description of the embodiments is only used to help understand the method and core idea of ​​the present invention and is not intended to limit the present invention in any way.

Claims

1. A gas valve, characterized in that, The device includes a valve body, an electromagnetic drive device, and a differential pressure device. The valve body is provided with an installation channel, a first flow channel, a second flow channel, and a third flow channel. The gas valve is provided with an inlet chamber, an outlet chamber, and a back pressure chamber. The valve body includes a first valve port portion, and a portion of the surface of the first valve port portion forms part of the channel wall of the first flow channel. The first flow channel communicates with the inlet chamber, the second flow channel communicates with the back pressure chamber, and the third flow channel communicates with the outlet chamber. The electromagnetic drive device includes a moving core assembly and a core component. The moving core assembly includes a moving core component and a sealing plug connected to the moving core component. The core component is at least partially located in the mounting channel and is sealed to the valve body. The sealing plug is located in the core cavity of the core component. The core component is provided with a second valve port. The first valve port and the second valve port are arranged facing each other. The sealing plug can be axially displaced relative to the core component to abut against the first valve port or against the second valve port. One side of the second flow channel is connected to the core cavity, and the other side is connected to the back pressure cavity of the gas valve. A flow passage is formed between the outer wall of the core component and the inner wall of the mounting hole. One side of the third flow channel is connected to the second valve port through the flow passage. The differential pressure device includes a diaphragm, a valve plug, a connecting rod connected to the valve plug, and a lever mechanism. The valve body is provided with a third valve port. The lever mechanism includes a lever body and a fixed frame. The diaphragm can directly or indirectly abut against the lever body. The lever body can directly or indirectly abut against the connecting rod. The fixed frame is fixedly connected to the valve body. The lever body can swing relative to the fixed frame.

2. A gas valve according to claim 1, characterized in that, The differential pressure device includes an elastic element that can apply force to the valve plug portion to abut against the third valve port portion.

3. A gas valve according to claim 2, characterized in that, The fixing frame includes a mounting part with a through hole. The connecting rod passes through the through hole and includes a first end and a second end. The first end is connected to the valve plug and the second end includes an abutment and a step. The abutment can abut against the lever body, and the elastic element abuts between the step and the mounting part or between the step and the valve body.

4. A gas valve according to claim 3, characterized in that... The mounting part includes a plate-shaped part and a guide part. The guide part protrudes from the plate-shaped part and has the through hole. The plate-shaped part has a screw hole for cooperating with the screw. The mounting part is fastened to the valve body by the screw. The elastic element is sleeved on the outer edge of the guide part.

5. A gas valve according to claim 3, characterized in that, The fixing frame includes an extension portion that protrudes from the mounting portion. The extension portion includes an extension plate with a preset distance between adjacent extension plates. A portion of the lever mechanism is located at the preset distance. The extension plate is provided with a first mating hole. The lever mechanism includes a support shaft that passes through the first mating hole.

6. A gas valve according to claim 5, characterized in that, The lever body includes a body portion, a flange portion, and a flanged portion. The flange portion is located on one side of the body portion and protrudes toward the diaphragm. The diaphragm can abut against the flange portion. The flanged portion extends and protrudes from the body portion. The protrusion direction of the flanged portion is opposite to the protrusion direction of the flange portion. The flanged portion is provided with a second mating hole corresponding to the first mating hole. The support shaft passes through the second mating hole. The lever body swings relative to the fixing frame with the support shaft as the fulcrum.

7. A gas valve according to claim 6, characterized in that, The flange portion is defined to have a first abutting position with the diaphragm, the connecting rod is defined to have a second abutting position with the diaphragm, and the support shaft is defined as the fulcrum position. The distance between the first abutting position and the second abutting position is defined as L1, and the distance between the second abutting position and the fulcrum position is defined as L2. Then, the following condition is satisfied: 1.5≤(L1+L2) / L2≤3.

8. A gas valve according to claim 2, characterized in that, The elastic element and the third valve port are located on different sides of the valve plug portion. The valve body includes an abutment portion, which is disposed opposite to the valve plug portion. The valve plug portion includes a small diameter portion and a large diameter portion. The elastic element is located on the outer periphery of the small diameter portion and abuts against the abutment portion and the large diameter portion.

9. A gas valve according to any one of claims 1-8, characterized in that, When the sealing plug abuts against the second valve port, there is an axial gap between the sealing plug and the first valve port. The first flow channel, the core cavity of the core component, the second flow channel, and the back pressure chamber are connected. Neither the first flow channel nor the second flow channel is connected to the third flow channel. The back pressure chamber can act on the lever body through the diaphragm to cause the connecting rod to drive the valve plug to open the third valve port.

10. A gas valve according to any one of claims 1-8, characterized in that, The gas valve includes a secondary electromagnetic pressure regulating device, a pressure regulating device, and a main differential pressure device. The secondary electromagnetic pressure regulating device includes a second moving core component and a second sealing plug connected to the second moving core component. The valve body has a fourth valve port, a fifth valve port, and a main valve port. The second sealing plug can approach or move away from the fourth valve port. The pressure regulating device includes a piston diaphragm assembly, which can approach or move away from the fifth valve port. The main differential pressure device is closer to the outlet port than the inlet port. The gas valve has a main back pressure chamber, including a main valve plug and a main diaphragm. The main valve plug can approach or move away from the main valve port.

11. A gas valve according to claim 10, characterized in that, The pressure regulating device is an electronically controlled pressure regulating device or a mechanical pressure regulating device. The valve body is also provided with a third valve port, a fourth flow channel, a fifth flow channel, a sixth flow channel, and a pressure relief channel. The differential pressure device includes a valve plug. The valve plug can approach or move away from the telescopic third valve port. The gas can flow from the third valve port into the fourth flow channel. The fourth flow channel can communicate with the fifth and sixth flow channels through the fourth valve port.

12. A gas valve, characterized in that, The device includes a valve body, an electromagnetic drive device, and a differential pressure device. The valve body is provided with an installation channel, a first flow channel, a second flow channel, and a third flow channel. The gas valve is provided with an inlet chamber and a back pressure chamber. The valve body includes a first valve port portion, and a portion of the surface of the first valve port portion forms part of the channel wall of the first flow channel. The first flow channel communicates with the inlet chamber, the second flow channel communicates with the back pressure chamber, and the third flow channel is connected to an external mother flame device. The electromagnetic drive device includes a moving core assembly and a core component. The moving core assembly includes a moving core component and a sealing plug connected to the moving core component. The core component is at least partially located in the mounting channel and is sealed to the valve body. The core component is provided with a second valve port. The sealing plug is axially displaced relative to the core component to abut against the first valve port or against the second valve port. The differential pressure device includes a diaphragm, a valve plug, a connecting rod connected to the valve plug, and a lever mechanism. The valve body is provided with a third valve port. The lever mechanism includes a lever body and a fixed frame. The diaphragm can directly or indirectly abut against the lever body. The lever body can directly or indirectly abut against the connecting rod. The fixed frame is fixedly connected to the valve body. The lever body can swing relative to the fixed frame.

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