Gas valve group

Abstract

The utility model provides a fuel gas valve group, which is arranged between a fuel gas supply end and a burner and comprises a first fuel gas interface, an electromagnetic valve, a regulating valve and a second fuel gas interface, the electromagnetic valve comprises a main valve plug and an auxiliary valve plug, the auxiliary valve plug is linked with the main valve plug and can doubly close the main valve port, and the regulating valve is connected with the second fuel gas interface. The regulating valve comprises a regulating valve plug and a regulating assembly, the electromagnetic valve is used for double blocking of gas circulation to completely stop leakage, so that the regulating valve does not need to have a valve sealing function, and the regulating valve plug and the regulating assembly can more accurately regulate gas flow or stabilize pressure. The defect that enough electric power needs to be reserved to open the valve after a known adjusting valve is sealed is overcome, and the situation that adhesion is generated due to the fact that an adjusting valve plug seals an adjusting valve opening, and the accuracy of adjusting gas flow and stabilizing pressure is affected is avoided.

Description

Technical Field

[0001] The utility model relates to a gas valve group, in particular to a gas valve group provided with a solenoid valve and a regulating valve. The solenoid valve can double-block the flow of gas and completely stop leakage, so that the regulating valve does not need to have a sealing valve function, thereby more accurately adjusting the gas flow or stabilizing the pressure. Background Art

[0002] In a gas supply system, two independent gas valves are typically installed within the gas flow path: one set of valves controls gas flow, while the other controls gas flow rate. In conjunction with an electronic control system, the valves controlling gas flow are typically solenoid valves for easy opening and closing, while the valves controlling gas flow rate are either pressure-stabilizing valves that automatically respond to gas pressure, or proportional valves that both automatically respond to gas pressure and precisely control gas flow rate. These valves are collectively referred to as regulating valves.

[0003] To improve safety, the aforementioned known regulating valves are usually designed to close the regulating valve opening to prevent the solenoid valve that controls the flow of gas from being incompletely closed or failing. This prevents the regulating valve from blocking the gas to the burner. However, due to this, a relatively large amount of electrical power is required to drive the regulating valve to open at the starting point of opening the valve. In particular, to prevent the rubber valve plug from sticking due to the closed valve opening, not only is a larger amount of electrical power required to open the valve, but it also affects the current starting point for opening the valve and the accuracy of subsequent gas flow regulation.

[0004] Furthermore, some existing burners use multi-stage burners to control the pilot and secondary burners. For example, in a gas water heater, a solenoid valve first opens the first burner to serve as the pilot burner. Another solenoid valve then opens to ignite the second burner. The solenoid valve for the first burner is then closed. During this process, if the first burner closes too early, the second burner won't ignite. If it closes too late, the heat will be too strong and uneven, resulting in uneven heat output. This requires improvement.

[0005] In light of this, the present inventors, having accumulated years of research and practical experience in related fields, have developed a gas valve train that effectively improves the power consumption, sticking, and gas flow accuracy of the regulating valve, while ensuring that the solenoid valve does not incompletely close or fail. It also addresses the uneven firepower problem of multi-stage burners. Utility Model Content

[0006] The purpose of the present utility model is to provide a gas valve group, which is provided with a solenoid valve and a regulating valve, wherein the solenoid valve can double-block the flow of gas through a double valve plug to completely stop leakage, so that the regulating valve does not need to have a sealing valve function, thereby improving the problem of easy adhesion and power consumption of the regulating valve plug, and enabling the regulating valve to have the effect of more accurately regulating the gas flow or stabilizing the pressure.

[0007] To achieve the above objectives, the present invention provides a gas valve assembly, which is disposed between a gas supply end and at least one burner and includes a first gas interface, a solenoid valve, a regulating valve, and a second gas interface. Gas supplied from the gas supply end can be released from the first gas interface through the solenoid valve and the regulating valve in sequence to the burner through the second gas interface, or from the second gas interface through the regulating valve and the solenoid valve in sequence to the burner through the first gas interface. The gas valve assembly comprises:

[0008] The solenoid valve comprises a main valve port connected to the first gas interface, a main valve plug, a secondary valve plug linked to the main valve plug, and an electromagnetic assembly, wherein the electromagnetic assembly can drive the main valve plug and the secondary valve plug to link open or double close the main valve port to block the flow of gas between the first gas interface and the second gas interface;

[0009] The regulating valve includes a regulating valve port connected between the main valve port and the second gas interface, a regulating valve plug movably arranged at the regulating valve port, and a regulating component capable of driving the regulating valve plug. The main valve plug and the auxiliary valve plug of the solenoid valve can double-block the gas flow and completely stop leakage, so that the regulating component can accurately drive the regulating valve plug close to or away from the regulating valve port to adjust the gas flow or stabilize the pressure, thereby preventing the regulating valve plug from closing the regulating valve port and causing sticking.

[0010] Through the above structure, the main valve plug and the auxiliary valve plug of the solenoid valve can doubly block the gas flow to avoid gas leakage, so that the regulating valve does not need to have a valve sealing function, so that the regulating valve plug can adjust closer to or away from the regulating valve port without pressing against the regulating valve port. On the one hand, it can avoid the regulating valve plug and the valve port from sticking. On the other hand, it can keep the starting point of the current for the displacement of the regulating valve plug at the same electric power, and there is no need to increase the current to drive the regulating valve plug to open the valve, thereby more accurately adjusting the gas flow or stabilizing the pressure.

[0011] The following further describes the implementation of each component:

[0012] During implementation, the gas valve assembly includes a valve body, a gas flow channel is provided in the valve body, and two ends of the gas flow channel are respectively the first gas interface and the second gas interface;

[0013] The main valve port, main valve plug and auxiliary valve plug of the solenoid valve are located in the gas flow channel. The solenoid assembly is assembled on the outside of the valve body relative to the main valve port, thereby driving the main valve plug and auxiliary valve plug to jointly open or double-close the main valve port.

[0014] The regulating valve port and regulating valve plug of the regulating valve are located in the gas flow channel. The regulating component is assembled on the valve body relative to the regulating valve port to adjust the opening between the regulating valve plug and the regulating valve port.

[0015] During implementation, the regulating valve is a pressure-stabilizing valve. The regulating assembly includes a diaphragm that can respond to gas pressure, a fine-tuning spring that supports the diaphragm, an adjusting screw that can adjust the elastic force of the fine-tuning spring, and a valve stem arranged between the diaphragm and the regulating valve plug. The diaphragm can automatically respond to the displacement of gas pressure and drive the valve stem to move, so that the regulating valve plug is moved closer to or away from the regulating valve port by the linkage displacement of the valve stem.

[0016] In practice, the regulating valve is an electrically driven proportional valve. The regulating assembly includes a DC motor, a diaphragm isolating the DC motor from the gas flow channel, a valve stem disposed between the diaphragm and the regulating valve plug, and a magnetic sensing element capable of sensing the rotational speed of the DC motor. The DC motor drives an output shaft through a clutch gear set to directly or indirectly push the valve stem to move, causing the regulating valve plug to move closer to or away from the regulating valve port to regulate the gas flow.

[0017] During implementation, the regulating valve is an electrically driven proportional valve, and the regulating assembly includes a moving coil module that can be driven by currents of different sizes, a diaphragm isolated and arranged between the moving coil module and the gas flow channel, a spring elastically supported between the moving coil module and the diaphragm, and a valve stem arranged between the diaphragm and the regulating valve plug; wherein the diaphragm is directly or indirectly pushed by the moving coil module to drive the valve stem to move, so that the regulating valve plug moves closer to or away from the regulating valve port to adjust the gas flow.

[0018] During implementation, the regulating valve is an electrically driven proportional valve, and the regulating assembly includes a stepping motor, a diaphragm isolated between the stepping motor and the gas flow channel, and a valve stem disposed between the diaphragm and the regulating valve plug; the stepping motor drives a transmission rod to directly or indirectly push the valve stem to move, causing the regulating valve plug to move closer to or away from the regulating valve port to adjust the gas flow.

[0019] During implementation, the regulating valve is an electrically driven proportional valve. The regulating assembly includes an electromagnetic coil group, a movable iron core that is moved by the magnetization of the electromagnetic coil group, a valve stem arranged between the movable iron core and the regulating valve plug, and a diaphragm arranged in the middle section of the valve stem. The diaphragm isolates the electromagnetic coil group and the movable iron core from the gas flow channel; the movable iron core is moved by the magnetization of the electromagnetic coil group and pushes the valve stem to move, causing the regulating valve plug to move closer to or away from the regulating valve port to adjust the gas flow.

[0020] During implementation, the electromagnetic component drives the main valve plug and the auxiliary valve plug to open and close the main valve port in a moving direction parallel to the ground, and the regulating component drives the regulating valve plug to move closer to or away from the regulating valve port in a moving direction perpendicular to the ground.

[0021] During implementation, the regulating component is provided with an operating end at the outer end opposite to the regulating valve port, and the operating end is exposed outside the valve body for adjusting the initial opening between the regulating valve plug and the regulating valve port.

[0022] During implementation, the burner is a multi-stage burner, which includes a connecting part connected to the first gas interface or the second gas interface, and a multi-stage fire grate connected to the connecting part, wherein: the connecting part includes a small fire channel connected to the multi-stage fire grate and one or more large fire channels isolated from each other, wherein each large fire channel is provided with a large fire solenoid valve, which can block or open the gas flow of the large fire channel, thereby causing the multi-stage fire grate to burn partially or completely.

[0023] Compared with previous technologies, this solenoid valve has a main valve plug and a secondary valve plug, which can double-block the gas flow and prevent gas leakage, so that the regulating valve does not need to have a valve sealing function. As a result, the regulating valve plug and the regulating component can more accurately adjust the gas flow or stabilize the pressure, overcoming the problem that the known regulating valve needs to reserve sufficient power to open the valve after sealing, and avoiding the problem that the regulating valve plug closes the regulating valve port and causes adhesion, which affects the regulation of gas flow and pressure.

[0024] Based on the technical means of the present invention, the following examples are suitable for the implementation of the present invention and are described in conjunction with the accompanying drawings: BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is the first embodiment of the present invention, which includes a moving coil module.

[0026] Figure 2 This is the second embodiment of the present invention, which includes a stepping motor.

[0027] Figure 3 This is the third embodiment of the present invention, which includes a moving iron core.

[0028] Figure 4 This is the fourth embodiment of the present invention, which includes a DC motor.

[0029] Figure 5 This is the fifth embodiment of the present invention. The solenoid valve of this embodiment is arranged in a horizontal direction.

[0030] Figure 6 This is the sixth embodiment of the present utility model. The regulating valve in this embodiment is a pressure-stabilizing valve.

[0031] Figure 7 This is a schematic diagram of the utility model connected to a multi-stage burner.

[0032] Figure 8 This is a schematic diagram of the gas entering from the second gas interface of the present invention.

[0033] Figure 9 for Figure 8 Schematic diagram of the solenoid valve opening to allow gas to flow.

[0034] Explanation of reference numerals: 100 - gas valve group; 101 - first gas interface; 102 - second gas interface; 103 - valve body; 104 - gas flow channel; 200 - gas supply end; 300 - burner; 10 - solenoid valve; 11 - main valve port; 12 - main valve plug; 13 - auxiliary valve; 14 - solenoid assembly; 20 - regulating valve; 21 - regulating valve port; 22 - regulating valve plug; A - regulating assembly; 23 - operating end; 31 - moving coil module; 32 - diaphragm; 33 - spring; 34 - valve stem; 41 - stepping motor ;42-diaphragm;43-valve stem;44-transmission rod;51-electromagnetic coil assembly;52-moving iron core;53-valve stem;54-diaphragm;61-DC motor;62-diaphragm;63-valve stem;64-clutch gear assembly;65-output shaft;66-magnetic induction element;661-Hall IC;662-reed switch;71-diaphragm;72-fine-tuning spring;73-adjusting screw;74-valve stem;81-connecting part;82-multi-stage fire grate;83-small fire channel;84-high fire channel;85-high fire solenoid valve. DETAILED DESCRIPTION

[0035] like Figures 1 to 9 As shown, the utility model provides a gas valve group, the gas valve group 100 is arranged between the gas supply end 200 and at least one burner 300, and includes a first gas interface 101, a solenoid valve 10, a regulating valve 20, and a second gas interface 102, so that the gas supplied by the gas supply end 200 can be Figures 1 to 7 As shown, the gas is released from the first gas interface 101 through the solenoid valve 10 and the regulating valve 20 in sequence and then released from the second gas interface 102 to the burner 300, or as shown in FIG. Figure 8 、 Figure 9 As shown, the gas flows from the second gas interface 102 through the regulating valve 20 and the solenoid valve 10 in sequence and is released from the first gas interface 101 to the burner 300. The only difference between the two is that the gas flows in opposite directions. The structures of the solenoid valve 10 and the regulating valve 20 are the same. The structures of the solenoid valve 10 and the regulating valve 20 are first described below.

[0036] like Figures 1 to 7 As shown, the solenoid valve 10 includes a main valve port 11 connected to the first gas interface 101, a main valve plug 12, a secondary valve plug 13 linked to the main valve plug 12, and an electromagnetic component 14, wherein the electromagnetic component 14 can drive the main valve plug 12 and the secondary valve plug 13 to link and open or double-close the main valve port 11; the purpose of this double valve plug design is: when one of the main valve plug 12 or the secondary valve plug 13 fails to close the valve, the secondary valve plug 13 or the main valve plug 12 can still close the main valve port 11, thereby blocking the gas flow between the first gas interface 101 and the second gas interface 102, thereby achieving the effect of completely stopping leakage.

[0037] The regulating valve 20 includes a regulating valve port 21 connected between the main valve port 11 and the second gas port 102, a regulating valve plug 22 movably disposed within the regulating valve port 21, and an adjusting assembly A capable of driving the regulating valve plug 22. When the adjusting assembly A drives the regulating valve plug 22 to move closer to or further from the regulating valve port 21, the regulating valve plug controls the flow of gas through the regulating valve port 21, achieving the purpose of regulating gas flow or stabilizing gas pressure.

[0038] The characteristics of the present invention are: the main valve plug 12 and the auxiliary valve plug 13 of the solenoid valve 10 can double-block the flow of gas and completely stop leakage, so that the regulating valve plug 22 does not need to close the regulating valve port 21 as in the known technology during implementation. On the one hand, it can prevent the regulating valve plug 22 from sticking to the regulating valve port 21. On the other hand, there is no need to reserve more electricity to drive the regulating valve plug 22 to move and open the regulating valve port 21, so that the starting point of the current driving the regulating valve plug 22 to move is maintained at the same electric power, so as to achieve the effect of accurately driving the regulating valve plug 22 close to or away from the regulating valve port 21 to adjust the gas flow or stabilize the pressure, and also has the function of saving electricity.

[0039] like Figure 8 、 Figure 9 As shown, the gas enters from the second gas interface 102, passes through the regulating valve 20 and the solenoid valve 10 in sequence, and is then released from the first gas interface 101. This embodiment can more clearly illustrate the advantages of the present invention.

[0040] As shown in the figure, although the upstream regulating valve plug 22 does not close the regulating valve port 21, it can double-block the gas flow through the downstream main valve plug 12 and auxiliary valve plug 13 to prevent gas leakage. When the downstream main valve plug 12 and auxiliary valve plug 13 are opened to allow gas to flow, the upstream regulating valve plug 22 can move closer to or further away from the regulating valve port 21 to adjust the gas flow or stabilize the pressure. There is no need to close the regulating valve port 21 as in the prior art, so there is no sticking, thereby allowing the starting point of the current displacement of the regulating valve plug 22 to remain at the same electrical power.

[0041] The following further describes the specific implementations of various gas valves adapted to the above features. Figure 1 As shown, the gas valve assembly 100 includes a valve body 103 . A gas flow channel 104 is provided in the valve body 103 . Two ends of the gas flow channel 104 are the first gas interface 101 and the second gas interface 102 .

[0042] The main valve port 11, main valve plug 12 and auxiliary valve plug 13 of the solenoid valve 10 are located in the gas flow channel 104, and the solenoid assembly 14 is assembled on the outside of the valve body 103 at a position relative to the main valve port 11, thereby driving the main valve plug 12 and auxiliary valve plug 13 to jointly open or double-close the main valve port 11.

[0043] The regulating valve port 21 and regulating valve plug 22 of the regulating valve 20 are located in the gas flow channel 104 . The regulating assembly A is assembled on the valve body 103 relative to the regulating valve port 21 to adjust the initial opening between the regulating valve plug 22 and the regulating valve port 21 .

[0044] As shown in the figure, the regulating valve 20 is an electrically driven proportional valve. The regulating assembly A includes a moving coil module 31 that can be driven by currents of different sizes, a diaphragm 32 that is isolated and arranged between the moving coil module 31 and the gas flow channel 104, a spring 33 that elastically supports the moving coil module 31 and the diaphragm 32, and a valve stem 34 that is arranged between the diaphragm 32 and the regulating valve plug 22; wherein the diaphragm 32 is directly or indirectly pushed by the moving coil module 31 to drive the valve stem 34 to move, so that the regulating valve plug 22 moves closer to or away from the regulating valve port 21 to adjust the gas flow.

[0045] like Figure 2 As shown, the regulating valve 20 is an electrically driven proportional valve. The regulating assembly A includes a stepping motor 41, a diaphragm 42 isolated between the stepping motor 41 and the gas flow channel 104, and a valve stem 43 disposed between the diaphragm 42 and the regulating valve plug 22. The stepping motor 41 drives a transmission rod 44 to directly or indirectly push the valve stem 43 to move, causing the regulating valve plug 22 to move closer to or away from the regulating valve port 21 to adjust the gas flow.

[0046] like Figure 3 As shown, the regulating valve 20 is an electrically driven proportional valve. The regulating assembly A includes an electromagnetic coil assembly 51, a movable iron core 52 that is moved by the magnetization of the electromagnetic coil assembly 51, a valve stem 53 disposed between the movable iron core 52 and the regulating valve plug 22, and a diaphragm 54 disposed in the middle section of the valve stem 53. The diaphragm 54 isolates the electromagnetic coil assembly 51 and the movable iron core 52 from the gas flow channel 104. The movable iron core 52 is moved by the magnetization of the electromagnetic coil assembly 51 to push the valve stem 53 to move, causing the regulating valve plug 22 to move closer to or away from the regulating valve port 21 to adjust the gas flow.

[0047] like Figure 4 As shown, the regulating valve 20 is an electrically driven proportional valve. The regulating assembly A includes a DC motor 61, a diaphragm 62 isolated between the DC motor 61 and the gas flow channel 104, and a valve stem 63 disposed between the diaphragm 62 and the regulating valve plug 22. The DC motor 61 drives an output shaft 65 via a clutch gear set 64 to directly or indirectly push against the valve stem 63, causing the regulating valve plug 22 to move closer to or away from the regulating valve port 21 to adjust the gas flow. In practice, the regulating assembly A further includes a magnetic sensing element 66 capable of sensing the rotational speed of the DC motor 61. This magnetic sensing element 66 includes, but is not limited to, a Hall effect IC 661 or a reed switch 662.

[0048] The solenoid valve 10 and the regulating valve 20 can be arranged in different directions on the valve body 103, such as Figure 3 As shown, the movement direction of the main valve plug 12 and the auxiliary valve plug 13 to open and close the main valve port 11 and the movement direction of the regulating valve plug 22 to approach or move away from the regulating valve port 21 are respectively perpendicular to the ground. Figure 5 As shown, the moving direction of the regulating valve plug 22 approaching or moving away from the regulating valve port 21 is perpendicular to the ground; the moving directions of the main valve plug 12 and the auxiliary valve plug 13 opening and closing the main valve port 11 are parallel to the ground.

[0049] above Figures 1 to 3 The regulating valves 20 are all electrically driven proportional valves. During implementation, the regulating assembly A of these embodiments is provided with an operating end 23 at the outer end opposite to the regulating valve port 21. The operating end 23 is exposed outside the valve body 103 so that the user can manually adjust the initial opening between the regulating valve plug 22 and the regulating valve port 21 through the operating end 23.

[0050] Furthermore, if Figure 6As shown, the regulating valve 20 is a pressure-stabilizing valve. The regulating assembly A includes a diaphragm 71 that can respond to gas pressure, a fine-tuning spring 72 that supports the diaphragm 71, an adjusting screw 73 that can adjust the elastic force of the fine-tuning spring 72, and a valve stem 74 disposed between the diaphragm 71 and the regulating valve plug 22. The diaphragm 71 can automatically respond to the displacement of the gas pressure and drive the valve stem 74 to move, so that the regulating valve plug 22 is moved by the valve stem 74 to move closer to or away from the regulating valve port 21 to stabilize the pressure.

[0051] In addition, the present invention can be installed on multiple burners or the upstream end of a multi-stage burner. Figure 7 Taking the multi-stage burner shown as an example, the burner 300 includes a connecting portion 81 connected to the second gas interface 102, and a multi-stage fire grate 82 connected to the connecting portion 81, wherein the connecting portion 81 includes a small fire channel 83 connected to the multi-stage fire grate 82 and one or more large fire channels 84 isolated from each other, and each large fire channel 84 is provided with a large fire solenoid valve 85. The large fire solenoid valve 85 can block or open the gas flow of the large fire channel 84, so that the multi-stage fire grate 82 only burns locally at the part corresponding to the small fire channel 83, or burns completely at the parts corresponding to the small fire channel 83 and the large fire channel 84; as shown in the figure, there are two large fire channels 84, and they are arranged on both sides of the small fire channel 83.

[0052] When the above-mentioned multi-stage burner 300 is in use, after the solenoid valve 10 is opened, the gas can flow from the second gas interface 102 through the low-fire channel 83 to the multi-stage fire grate 82, so that the part of the multi-stage fire grate 82 corresponding to the low-fire channel 83 burns in a low-fire state; and during the gas circulation process, the regulating valve plug 22 can be moved closer to or away from the regulating valve port 21 to adjust the gas flow rate to control the minimum fire of the multi-stage fire grate 82.

[0053] To increase the firepower, simply open one of the high-fire solenoid valves 85, which opens the corresponding high-fire channel 84 and releases gas. The corresponding portion of the multi-stage fire grate 82 is ignited by the low-fire and begins to burn, increasing the firepower. If the user requires even greater firepower, simply open another high-fire solenoid valve 85 to activate all of the multi-stage fire grate 82. This step-by-step opening design makes it easier to control the size of the burner and avoids fluctuating firepower.

[0054] Compared to the prior art, the solenoid valve 10 has a main valve plug 12 and a secondary valve plug 13, which can double-block the gas flow and prevent gas leakage, so that the regulating valve 20 does not need to have a valve sealing function. As a result, the regulating valve plug 22 and the regulating assembly A can more accurately regulate the gas flow or stabilize the pressure, overcoming the need to reserve sufficient power to open the valve after the conventional regulating valve 20 is sealed, and preventing the regulating valve plug 22 from closing the regulating valve port 21 and causing adhesion, thereby affecting the accuracy of regulating the gas flow and stabilizing the pressure.

[0055] The above description of the embodiments and the accompanying drawings merely illustrate preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Any embodiments that are similar or identical to the purpose, structure, device, feature, etc. of the present invention shall fall within the scope of the present invention.

Claims

1. A gas valve assembly, disposed between a gas supply end and at least one burner, comprising a first gas interface, a solenoid valve, a regulating valve, and a second gas interface, wherein gas supplied from the gas supply end can be released from the first gas interface through the solenoid valve and the regulating valve in sequence to the burner through the second gas interface, or from the second gas interface through the regulating valve and the solenoid valve in sequence to the burner through the first gas interface, characterized in that: The solenoid valve comprises a main valve port connected to the first gas interface, a main valve plug, a secondary valve plug linked to the main valve plug, and an electromagnetic assembly, wherein the electromagnetic assembly can drive the main valve plug and the secondary valve plug to link open or double close the main valve port to block the flow of gas between the first gas interface and the second gas interface; The regulating valve includes a regulating valve port connected between the main valve port and the second gas interface, a regulating valve plug movably arranged at the regulating valve port, and a regulating component capable of driving the regulating valve plug. The main valve plug and the auxiliary valve plug of the solenoid valve can double-block the gas flow and completely stop leakage, so that the regulating component can accurately drive the regulating valve plug close to or away from the regulating valve port to adjust the gas flow or stabilize the pressure.

2. The gas valve train according to claim 1, characterized in that: The gas valve assembly includes a valve body, a gas flow channel is provided in the valve body, and two ends of the gas flow channel are respectively a first gas interface and a second gas interface; The main valve port, main valve plug and auxiliary valve plug of the solenoid valve are located in the gas flow channel. The solenoid assembly is assembled on the outside of the valve body relative to the main valve port, thereby driving the main valve plug and auxiliary valve plug to jointly open or double-close the main valve port. The regulating valve port and regulating valve plug of the regulating valve are located in the gas flow channel. The regulating component is assembled on the valve body relative to the regulating valve port to adjust the opening between the regulating valve plug and the regulating valve port.

3. The gas valve train according to claim 2, characterized in that: The regulating valve is a pressure-stabilizing valve. The regulating assembly includes a diaphragm that can respond to gas pressure, a fine-tuning spring that supports the diaphragm, an adjusting screw that can adjust the elastic force of the fine-tuning spring, and a valve stem arranged between the diaphragm and the regulating valve plug. The diaphragm can automatically respond to the displacement of gas pressure and drive the valve stem to move, causing the regulating valve plug to be moved closer to or away from the regulating valve port in conjunction with the valve stem.

4. The gas valve train according to claim 2, characterized in that: The regulating valve is an electrically driven proportional valve. The regulating assembly includes a DC motor, a diaphragm isolating the DC motor from the gas flow channel, a valve stem disposed between the diaphragm and the regulating valve plug, and a magnetic sensing element capable of sensing the rotational speed of the DC motor. The DC motor drives an output shaft through a clutch gear set to directly or indirectly push the valve stem to displace the regulating valve plug toward or away from the regulating valve port, thereby regulating the gas flow.

5. The gas valve train according to claim 2, characterized in that: The regulating valve is an electrically driven proportional valve. The regulating assembly includes a moving coil module that can be driven by currents of different magnitudes, a diaphragm that is isolated and arranged between the moving coil module and the gas flow channel, a spring that elastically supports the moving coil module and the diaphragm, and a valve stem arranged between the diaphragm and the regulating valve plug. The diaphragm is directly or indirectly pushed by the moving coil module to drive the valve stem to move, causing the regulating valve plug to move closer to or away from the regulating valve port to adjust the gas flow.

6. The gas valve train according to claim 2, characterized in that: The regulating valve is an electrically driven proportional valve. The regulating assembly includes a stepper motor, a diaphragm isolated between the stepper motor and the gas flow channel, and a valve stem disposed between the diaphragm and the regulating valve plug. The stepper motor drives a transmission rod to directly or indirectly push the valve stem to move the regulating valve plug toward or away from the regulating valve port to adjust the gas flow.

7. The gas valve train according to claim 2, characterized in that: The regulating valve is an electrically driven proportional valve. The regulating assembly includes an electromagnetic coil group, a movable iron core that is moved by the magnetization of the electromagnetic coil group, a valve stem arranged between the movable iron core and the regulating valve plug, and a diaphragm arranged in the middle section of the valve stem. The diaphragm isolates the electromagnetic coil group and the movable iron core from the gas flow path; the movable iron core is moved by the magnetization of the electromagnetic coil group and pushes the valve stem to move, causing the regulating valve plug to move closer to or away from the regulating valve port to adjust the gas flow.

8. The gas valve train according to claim 7, characterized in that: The electromagnetic component drives the main valve plug and the auxiliary valve plug to open and close the main valve port in a moving direction parallel to the ground, and the regulating component drives the regulating valve plug to move closer to or away from the regulating valve port in a moving direction perpendicular to the ground.

9. The gas valve train according to any one of claims 5 to 8, characterized in that: The regulating component is provided with an operating end at the outer end opposite to the regulating valve port. The operating end is exposed outside the valve body for regulating the initial opening between the regulating valve plug and the regulating valve port.

10. The gas valve train according to any one of claims 1 to 8, characterized in that: The burner is a multi-stage burner, which includes a connecting part connected to the first gas interface or the second gas interface, and a multi-stage fire grate connected to the connecting part. The connecting part includes a small fire channel connected to the multi-stage fire grate and one or more large fire channels isolated from each other, wherein each large fire channel is provided with a large fire solenoid valve, which can block or open the gas flow of the large fire channel, thereby causing the multi-stage fire grate to burn partially or completely.

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