A full premix gas proportional control valve

Abstract

The utility model discloses a full premix formula gas proportional regulating valve, including adjusting assembly, stabilizing pressure subassembly and servo subassembly. Adjusting assembly includes casing, first valve and second valve, stabilizing pressure subassembly includes support, stabilizing pressure diaphragm, third valve and fourth valve, and support is detachably connected with casing, and servo subassembly includes servo box, servo valve, first channel and second channel, and servo box is detachably connected with casing. The utility model discloses can realize flow regulation, zero setting, stabilizing pressure function, and, the maintenance of convenient later period and the individual replacement of spare part.

Description

Technical Field

[0001] This utility model relates to the field of gas valve technology, and in particular to a fully premixed gas proportional regulating valve. Background Technology

[0002] In related technologies, fully premixed gas proportional control valves require the addition of a flow regulating device at the outlet end. This device adjusts the gas flow rate to match the fan speed, achieving "zero pressure" at the outlet. This structure necessitates a separate flow regulating device, resulting in a larger product size, higher cost, and lower market share. Furthermore, fully premixed gas proportional control valves are difficult to repair or replace after installation, leading to high maintenance costs in the long run. Utility Model Content

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a fully premixed gas proportional regulating valve.

[0004] The solution to the technical problem of this utility model is: A fully premixed gas proportional control valve, comprising: The regulating assembly includes a housing, a first valve, and a second valve. The housing has a first cavity, a second cavity, and a third cavity. The first cavity communicates with the second cavity, and the first valve is located between the first cavity and the second cavity. A voltage stabilizing assembly includes a bracket, a voltage stabilizing diaphragm, a third valve, and a fourth valve. The bracket is detachably connected to the housing and forms a voltage stabilizing chamber together with the voltage stabilizing diaphragm. The voltage stabilizing chamber is connected to a second chamber and a third chamber. The third valve is located between the voltage stabilizing chamber and the second chamber. The voltage stabilizing diaphragm is driven to the third valve to open or block the passage between the voltage stabilizing chamber and the second chamber. The fourth valve is located between the voltage stabilizing chamber and the third chamber. The servo assembly includes a servo box, a servo valve, a first channel, and a second channel. The servo box is detachably connected to the housing and is connected to the voltage stabilizing diaphragm to form a servo cavity. The second cavity is connected to the servo cavity through the first channel. The second valve is located between the first channel and the second cavity. The third cavity is connected to the servo cavity through the second channel. The servo valve is located between the third cavity and the second channel.

[0005] This invention has at least the following beneficial effects: When using the fully premixed gas proportional regulating valve of this embodiment, gas enters the first chamber through the inlet of the fully premixed gas proportional regulating valve. At this time, the first valve is opened, and the gas enters the second chamber through the first valve. Since the third valve is closed, the gas cannot flow into the pressure regulating chamber. The second valve is opened, and the gas in the second chamber flows into the first channel through the second valve and flows out along the first channel to the servo chamber. At this time, the gas in the servo chamber exerts pressure on the pressure regulating diaphragm towards the pressure regulating chamber, causing the pressure regulating diaphragm to shift towards one side of the pressure regulating chamber, pushing the third valve to open. The gas in the second chamber can then enter the pressure regulating chamber through the third valve to achieve pressure stabilization, and flows out to the third chamber through the fourth valve. The gas in the third chamber flows into the gas equipment through the outlet of the fully premixed gas proportional regulating valve. Part of the gas flowing into the servo chamber flows into the second channel, enters the servo valve through the second channel, and enters the third chamber under the control of the servo valve to achieve pressure relief.

[0006] Because it is equipped with a first valve, a second valve, a third valve, a fourth valve, and a servo valve, no additional flow regulation device is needed to regulate the gas flow during use. This significantly reduces the product's size, lowers production and installation costs, and increases occupancy rate. Furthermore, since the servo box and housing are detachably connected, and the bracket and housing are also detachably connected, the regulating component, voltage stabilizing component, and servo component can be separated. During later maintenance, only the damaged parts need to be removed and replaced individually, greatly reducing subsequent maintenance costs.

[0007] As a further improvement to the above technical solution, the voltage stabilizing component also includes a sealing gasket, which is disposed between the housing and the bracket.

[0008] As a further improvement to the above technical solution, the third valve includes a third sealing element, a pressure regulating rod, and a third spring. The pressure regulating rod passes through the bracket, one end of which has an abutment portion that abuts against the pressure stabilizing diaphragm, and the other end is connected to the third sealing element and extends into the second cavity. One end of the third spring is connected to the abutment portion, and the other end is connected to the bracket. The third sealing element is used to block the passage between the second cavity and the pressure stabilizing cavity.

[0009] As a further improvement to the above technical solution, the third sealing member is provided with an arc surface protruding towards the pressure stabilizing cavity. When the third valve is in the closed state, the arc surface of the third sealing member abuts against the bracket.

[0010] As a further improvement to the above technical solution, the third valve also includes a pressure plate, which is disposed between the abutment portion and the pressure stabilizing diaphragm. The pressure stabilizing diaphragm is provided with a protrusion, and the pressure plate is provided with a slot, in which the protrusion is engaged with the slot.

[0011] As a further improvement to the above technical solution, the fourth valve includes an adjusting bolt, a fourth sealing element, a support element, and a fourth spring. The fourth sealing element is connected to the adjusting bolt and is used to block the passage between the third cavity and the pressure stabilizing cavity. The support element is connected to the bracket. One end of the fourth spring abuts against the fourth sealing element, and the other end abuts against the support element. The adjusting bolt is connected to the housing.

[0012] As a further improvement to the above technical solution, the adjusting bolt includes an operating part and an adjusting part, the fourth sealing member includes a sealing part and a connecting part, the adjusting bolt is driven to one end of the connecting part, the other end of the connecting part passes through the support member and is slidably connected to the support member, the sealing part is located on the outside of the connecting part, and the fourth spring is sleeved on the outside of the connecting part and abuts against the sealing part.

[0013] As a further improvement to the above technical solution, the servo valve includes a servo bolt, a servo spring, a servo diaphragm, and a servo valve seat. The servo valve seat is detachably connected to the housing. The servo valve seat is provided with a pressure relief chamber, which is connected to the second channel and the third cavity respectively. The servo bolt is threadedly connected to the servo valve seat and extends out of the servo valve seat. One end of the servo spring abuts against the servo bolt, and the other end abuts against the servo diaphragm. The servo diaphragm is used to block the passage between the second channel and the pressure relief chamber.

[0014] As a further improvement to the above technical solution, the first valve includes a first sealing element, a first moving rod, and a first driving source. The first driving source is connected to the housing, the first moving rod is connected to the first sealing element, and the first driving source is drivingly connected to the first moving rod to drive the first moving rod to move relative to the housing and drive the first sealing element to open or block the passage between the first cavity and the second cavity.

[0015] As a further improvement to the above technical solution, the second valve includes a second plugging element, a second moving rod, and a second driving source. The second driving source is connected to the housing, the second moving rod is connected to the second plugging element, and the second driving source is drivingly connected to the second moving rod to drive the second moving rod to move relative to the housing and drive the second plugging element to open or block the passage between the second cavity and the first channel.

[0016] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly explained below. Obviously, the described drawings are only a part of the embodiments of this utility model, and not all of them. Those skilled in the art can obtain other design schemes and drawings based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the internal structure of the fully premixed gas proportional control valve according to an embodiment of the present invention; Figure 2 This is a top view of the fully premixed gas proportional regulating valve according to an embodiment of the present utility model; Figure 3 This is a schematic diagram of the regulating component of the fully premixed gas proportional regulating valve according to an embodiment of the present invention; Figure 4 This is an exploded view of the pressure stabilizing component of the fully premixed gas proportional regulating valve according to an embodiment of this utility model.

[0019] Reference numerals: 100, Adjustment assembly; 110, Housing; 111, First cavity; 112, Second cavity; 113, Third cavity; 120, First valve; 130, Second valve; 200, Pressure stabilizing assembly; 210, Support; 211, Pressure stabilizing chamber; 212, Side frame; 213, Top cover; 220, Pressure stabilizing diaphragm; 221, Protrusion; 230, Third valve; 231, Third sealing element; 232, Pressure adjusting rod; 233, Third spring; 234. Pressure plate; 240. Fourth valve; 241. Adjusting bolt; 242. Fourth sealing component; 243. Support component; 244. Fourth spring; 250. Sealing gasket; 300. Servo assembly; 310. Servo box; 311. Servo chamber; 320. Servo valve; 321. Servo bolt; 322. Servo spring; 323. Servo diaphragm; 324. Servo valve seat; 325. Pressure relief chamber; 330. First channel; 340. Second channel. Detailed Implementation

[0020] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0021] In the description of this utility model, the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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 utility model.

[0022] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0023] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0024] Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are all within the scope of protection of this utility model. The various technical features of this utility model can be combined interactively without contradicting each other.

[0025] Reference Figures 1 to 4 This utility model embodiment proposes a fully premixed gas proportional regulating valve, which can realize flow regulation, zeroing, and pressure stabilization functions, and facilitates later maintenance and individual replacement of parts.

[0026] The fully premixed gas proportional control valve includes a regulating component 100, a pressure stabilizing component 200, and a servo component 300. The regulating component 100 includes a housing 110, a first valve 120, and a second valve 130. The housing 110 has a first cavity 111, a second cavity 112, and a third cavity 113. The first cavity 111 communicates with the second cavity 112, and the first valve 120 is located between the first cavity 111 and the second cavity 112. The voltage stabilizing assembly 200 includes a bracket 210, a voltage stabilizing diaphragm 220, a third valve 230, and a fourth valve 240. The bracket 210 is detachably connected to the housing 110, and the bracket 210 and the voltage stabilizing diaphragm 220 together form a voltage stabilizing chamber 211. The voltage stabilizing chamber 211 is connected to the second chamber 112 and the third chamber 113 respectively. The third valve 230 is disposed between the voltage stabilizing chamber 211 and the second chamber 112, and the voltage stabilizing diaphragm 220 is drivenly connected to the third valve 230. The fourth valve 240 is disposed between the voltage stabilizing chamber 211 and the third chamber 113. The servo assembly 300 includes a servo box 310, a servo valve 320, a first channel 330, and a second channel 340. The servo box 310 is detachably connected to the housing 110. The servo box 310 is connected to the voltage regulator diaphragm 220 to form a servo cavity 311. The second cavity 112 is connected to the servo cavity 311 through the first channel 330, and the third cavity 113 is connected to the servo cavity 311 through the second channel 340. The second valve 130 is disposed between the first channel 330 and the second cavity 112, while the servo valve 320 is disposed between the third cavity 113 and the second channel 340.

[0027] Specifically, in this embodiment, the servo cavity 311 is located on the lower side of the voltage stabilizing diaphragm 220, the voltage stabilizing cavity 211 is located on the upper side of the voltage stabilizing diaphragm 220, and the second cavity 112 and the third cavity 113 are respectively located on the upper side of the voltage stabilizing cavity 211.

[0028] When using the fully premixed gas proportional control valve of this embodiment, gas enters the first chamber 111 through the inlet of the fully premixed gas proportional control valve. At this time, the first valve 120 is opened, and the gas enters the second chamber 112 through the first valve 120. Since the third valve 230 is closed, the gas cannot flow into the pressure regulating chamber 211. The second valve 130 is opened, and the gas in the second chamber 112 flows into the first channel 330 through the second valve 130 and flows out along the first channel 330 to the servo chamber 311. At this time, the gas in the servo chamber 311 will exert upward pressure on the pressure regulating diaphragm 220, causing the pressure regulating diaphragm 220 to shift upward, pushing the third valve 230 to open. The gas in the second chamber 112 can enter the pressure regulating chamber 211 through the third valve 230 to achieve pressure stabilization, and then flow out to the third chamber 113 through the fourth valve 240. The gas in the third chamber 113 flows into the gas equipment through the outlet of the fully premixed gas proportional control valve. Part of the gas flowing into the servo chamber 311 flows into the second channel 340, enters the servo valve 320 through the second channel 340, and enters the third chamber 113 under the control of the servo valve 320 to achieve pressure relief.

[0029] Understandably, with the inclusion of the first valve 120, second valve 130, third valve 230, fourth valve 240, and servo valve 320, gas flow regulation can be achieved without the need for additional flow control devices, significantly reducing product size, lowering production and installation costs, and increasing occupancy rate. Furthermore, since the servo box 310 and housing 110 are detachably connected, and the bracket 210 and housing 110 are also detachably connected, the regulating component 100, voltage stabilizing component 200, and servo component 300 can be separated from each other. During later maintenance, only damaged parts need to be removed and replaced individually, greatly reducing subsequent maintenance costs.

[0030] In some embodiments, the servo box 310 and the housing 110 are detachably connected by screws. After the bracket 210 is installed inside the housing 110, the servo box 310 supports the lower end of the bracket 210, thereby realizing the connection and installation between the bracket 210 and the housing 110.

[0031] In some embodiments, the voltage stabilizing assembly 200 further includes a sealing gasket 250, which is disposed between the housing 110 and the bracket 210. The sealing gasket 250 enables a sealed connection between the top of the bracket 210 and the housing 110, preventing the gas located in the second cavity 112 and the third cavity 113 from entering the gap between the gas and the housing 110, thus ensuring the normal use of the voltage stabilizing function.

[0032] In some embodiments, the first valve 120 includes a first plugging member, a first moving rod, and a first driving source. The first driving source is connected to the housing 110, the first moving rod is connected to the first plugging member, and the first driving source is driven to connect with the first moving rod. Under the driving action of the first driving source, the first moving rod can move relative to the housing 110 and drive the first plugging member to open or block the passage between the first cavity 111 and the second cavity 112.

[0033] In some embodiments, a first spring is provided between the first sealing member and the housing 110, the first driving source is a first coil, the first coil is embedded in the housing 110, the first moving rod is an iron core, and after the first coil is energized, the first moving rod can move upward, so that the first spring is compressed and the first cavity 111 and the second cavity 112 are connected, and the gas can enter the second cavity 112 from the first cavity 111.

[0034] In some embodiments, the second valve 130 includes a second plugging member, a second moving rod, and a second driving source. The second driving source is connected to the housing 110, the second moving rod is connected to the second plugging member, and the second driving source is driven to connect with the second moving rod. Under the driving action of the second driving source, the second driving rod can move relative to the housing 110 and drive the second plugging member to open or block the passage between the second cavity 112 and the first channel 330.

[0035] In some embodiments, a second spring is provided between the second sealing member and the housing 110, the second driving source is a second coil, the second coil is embedded in the housing 110, the second moving rod is an iron core, and after the second coil is energized, the second moving rod can move upward, so that the second spring is compressed and the second cavity 112 and the first channel 330 are connected, and the gas can enter the first channel 330 from the second cavity 112 and flow into the servo cavity 311.

[0036] In some embodiments, both the first sealing element and the second sealing element are rubber blocks.

[0037] In some embodiments, the third valve 230 includes a third plugging member 231, a pressure regulating rod 232, and a third spring 233. The pressure regulating rod 232 passes through the bracket 210. One end of the pressure regulating rod 232 is provided with an abutting portion that abuts against the pressure stabilizing diaphragm 220. The other end is connected to the third plugging member 231 and extends upward toward the second cavity 112. One end of the third spring 233 is connected to the abutting portion, and the other end is connected to the bracket 210. The third plugging member 231 is used to block the passage between the second cavity 112 and the pressure stabilizing cavity 211.

[0038] Understandably, when the pressure stabilizing diaphragm 220 moves upward, the abutting part pushes the third spring 233 upward to compress it, and causes the third sealing member 231 to move upward, opening the passage between the second cavity 112 and the pressure stabilizing cavity 211, so that the gas in the second cavity 112 can flow into the pressure stabilizing cavity 211.

[0039] In some embodiments, the third sealing member 231 is hemispherical, with an arc surface on one side, and the arc surface protrudes towards the pressure stabilizing chamber 211. This configuration ensures that when the second chamber 112 and the pressure stabilizing chamber 211 are sealed, i.e., when the third valve 230 is closed, the arc surface of the third sealing member 231 abuts against the bracket 210, guaranteeing effective sealing of the passage between the second chamber 112 and the pressure stabilizing chamber 211. Furthermore, when the third valve 230 is open, it also facilitates the flow of gas from the second chamber 112 along the arc surface into the pressure stabilizing chamber 211.

[0040] In some embodiments, the third valve 230 further includes a pressure plate 234, which is disposed between the abutment portion and the pressure stabilizing diaphragm 220. The pressure stabilizing diaphragm 220 is provided with an upwardly protruding protrusion 221, and the pressure plate 234 is provided with a slot. In use, the protrusion 221 is engaged in the slot to realize the connection between the pressure plate 234 and the pressure stabilizing diaphragm 220.

[0041] It is understandable that setting the pressure plate 234 can increase the force-bearing area of ​​the pressure-stabilizing diaphragm 220, improve the pressure stabilizing accuracy of the pressure-stabilizing diaphragm 220, and improve the sensitivity of the contact part. When the gas in the servo cavity 311 applies a small upward pressure to a certain position of the pressure-stabilizing diaphragm 220, the small movement of the pressure-stabilizing diaphragm 220 can be transmitted by the pressure plate 234 to the pressure regulating rod 232, so that the third sealing member 231 opens the passage between the second cavity 112 and the pressure-stabilizing cavity 211.

[0042] Understandably, due to the presence of the protrusion 221 and the slot, when either the voltage regulator diaphragm 220 or the pressure plate 234 is damaged, the damaged part can be replaced individually, further reducing subsequent maintenance costs.

[0043] In some embodiments, the fourth valve 240 includes an adjusting bolt 241, a fourth sealing element 242, a support element 243, and a fourth spring 244. Specifically, the bracket 210 includes a side frame 212 and a top cover 213. The top cover 213 is connected to the upper end of the side frame 212. The fourth sealing element 242 is disposed at the lower end of the adjusting bolt 241 and is used to block the passage between the third cavity 113 and the pressure stabilizing cavity 211. The support element 243 is connected to the top cover 213 of the bracket 210. One end of the fourth spring 244 abuts against the fourth sealing element 242, and the other end abuts against the support element 243. The adjusting bolt 241 is connected to the housing 110.

[0044] It is understandable that by adjusting the relative position between the fourth sealing member 242 and the bracket 210 through adjusting the bolt 241, the opening of the passage between the third cavity 113 and the pressure stabilizing cavity 211 by the fourth sealing member 242 can be adjusted to achieve zero pressure stabilization. Specifically, in this embodiment, this is achieved by manually rotating the adjusting bolt 241.

[0045] In some embodiments, the fourth sealing member 242 includes a sealing part and a connecting part. The lower end of the adjusting bolt 241 is driven to be connected to one end of the connecting part, and the other end of the connecting part passes through the support member 243 and is slidably connected to the support member 243. The fourth sealing member 242 is located on the outside of the connecting part. Under the driving action of the adjusting bolt 241, the connecting part can drive the fourth sealing member 242 to move up and down relative to the support member 243, thereby realizing flow regulation.

[0046] It is understandable that the fourth spring 244 is sleeved on the outside of the connecting part, and the upper end of the fourth spring 244 abuts against the sealing part. The connecting part can guide the extension and retraction of the fourth spring 244 to ensure that its extension and retraction are in the vertical direction.

[0047] In some embodiments, the operating part is provided with a threaded hole, and the outer periphery of the adjusting part is connected to the wall of the threaded hole by a thread. The support member 243 is provided with a non-circular hole, and the adjusting part passes through the non-circular hole. By rotating the adjusting part, the operating part can be moved up and down, thereby driving the fourth sealing member 242 to move up and down to adjust the opening size of the passage between the pressure stabilizing chamber 211 and the third chamber 113, thereby realizing flow regulation.

[0048] The flow regulation function of the fully premixed gas proportional control valve in this embodiment is mainly achieved through the fourth valve 240. By default, the fourth sealing element 242 is in its maximum opening state under the action of the fourth spring 244. When the adjusting bolt 241 is rotated clockwise, the adjusting part moves downward, forcing the fourth sealing element 242 to move downward, and the opening of the fourth valve 240 decreases. At this time, the gas flowing from the pressure stabilizing chamber 211 to the third chamber 113 decreases synchronously, and the gas flowing from the outlet end of the fully premixed gas proportional control valve to the gas equipment also decreases. If it is necessary to increase the gas flow at the outlet end of the fully premixed gas proportional control valve, the adjusting bolt 241 can be rotated counterclockwise.

[0049] In some embodiments, the servo valve 320 includes a servo bolt 321, a servo spring 322, a servo diaphragm 323, and a servo valve seat 324. The servo valve seat 324 is detachably connected to the housing 110. The servo valve seat 324 is provided with a pressure relief chamber 325. Specifically, the servo valve seat 324 includes a valve cover and a seat body. The housing 110 is provided with a slot for mounting the seat body. The seat body is installed in the slot and opens upward. The valve cover is installed on the upper end face of the housing 110. The valve cover and the seat body together form the pressure relief chamber 325. The pressure relief chamber 325 communicates with the second channel 340 and the third cavity 113 respectively. The servo bolt 321 is threadedly connected to the valve cover. The upper end of the servo bolt 321 can extend out of the valve cover. One end of the servo spring 322 abuts against the servo bolt 321, and the other end abuts against the servo diaphragm 323. The servo diaphragm 323 is used to block the passage between the second channel 340 and the pressure relief chamber 325.

[0050] It is understandable that by adjusting the servo bolt 321, the initial pressure of the servo spring 322 can be changed, and the force required to open the servo diaphragm 323 can be adjusted. Before use, the servo bolt 321 can be adjusted to meet the specific conditions required by the customer. The specific conditions include information such as the specific outlet air pressure, the specific outlet load, and whether negative pressure needs to be added to the outlet.

[0051] It is understood that the servo screw 321 in this embodiment can be adjusted manually.

[0052] The pressure stabilization principle of the fully premixed gas proportional control valve in this embodiment is as follows: the servo chamber 311 is connected to the second channel 340, allowing part of the gas in the servo chamber 311 to flow through the second channel 340 to the pressure relief chamber 325. The gas in the pressure relief chamber 325 flows to the third chamber 113 and then flows out to the gas equipment through the outlet end of the fully premixed gas proportional control valve. Since the outlet flow rate and outlet pressure have been zeroed through the servo bolt 321 and the adjusting bolt 241, the gas pressure in the servo chamber 311 is constant, the opening degree of the third valve 230 is constant, and the outlet flow rate or outlet pressure of the fully premixed gas proportional control valve is relatively constant.

[0053] When the inlet pressure of the fully premixed gas proportional control valve fluctuates more, the gas pressure flowing into the servo chamber 311 increases. At this time, the gas pressure flowing out of the second channel 340 also increases. Under the action of the increased gas pressure, the servo diaphragm 323 is pushed upward by the elastic force of the servo spring 322, which increases the opening of the passage between the second channel 340 and the pressure relief chamber 325. This results in an increase in the amount of gas flowing into the third chamber 113 through the pressure relief chamber 325, thereby reducing the pressure in the servo chamber 311. Consequently, the opening of the third valve 230 decreases. At this time, the amount of gas flowing from the second chamber 112 to the third chamber 113 decreases, thus ensuring that the outlet pressure of the fully premixed gas proportional control valve does not increase with the increase of the inlet pressure.

[0054] When the inlet pressure of the fully premixed gas proportional control valve fluctuates and decreases, the gas pressure flowing into the servo chamber 311 decreases. At this time, the gas pressure flowing out of the second channel 340 also decreases. Under the action of the reduced gas pressure, it is impossible to balance with the elastic force of the servo spring 322. The elastic force of the servo spring 322 pushes the servo diaphragm 323 downward, which reduces the opening of the passage between the second channel 340 and the pressure relief chamber 325. This results in a reduction in the amount of gas flowing through the pressure relief chamber 325 to the third chamber 113, thereby increasing the pressure in the servo chamber 311. Consequently, the opening of the third valve 230 increases. At this time, the amount of gas flowing from the second chamber 112 to the third chamber 113 increases, thus ensuring that the outlet pressure of the fully premixed gas proportional control valve does not decrease with the decrease in the inlet pressure.

[0055] The proportional performance adjustment principle of the fully premixed gas proportional control valve in this embodiment is as follows: When the power of the negative pressure device at the outlet of the fully premixed gas proportional control valve increases, the negative pressure at the outlet will rise. This negative pressure will cause the servo diaphragm 323 in the pressure relief chamber 325 to move downward, reducing the opening of the passage between the second channel 340 and the pressure relief chamber 325. This reduces the amount of gas flowing out of the pressure relief chamber 325, resulting in an increase in the gas pressure in the servo chamber 311. When the gas pressure in the servo chamber 311 increases, the valve opening of the third valve 230 will widen, increasing the amount of gas flowing into the pressure stabilizing chamber 211. This, in turn, increases the amount of gas flowing from the pressure stabilizing chamber 211 to the third chamber 113, causing the positive pressure at the outlet of the fully premixed gas proportional control valve to rise. Since the "positive pressure" formed by the gas at the outlet and the "negative pressure" formed by the increased power of the negative pressure device rise simultaneously, the pressure at the outlet remains constant.

[0056] When the power of the negative pressure device at the outlet of the fully premixed gas proportional control valve decreases, the negative pressure at the outlet decreases. This negative pressure causes the servo diaphragm 323 in the pressure relief chamber 325 to move upward, increasing the opening of the passage between the second channel 340 and the pressure relief chamber 325. This increases the amount of gas flowing out of the pressure relief chamber 325, resulting in a decrease in the gas pressure in the servo chamber 311. When the gas pressure in the servo chamber 311 decreases, the opening of the third valve 230 becomes smaller, reducing the amount of gas flowing into the pressure stabilizing chamber 211. Consequently, the amount of gas flowing from the pressure stabilizing chamber 211 to the third chamber 113 decreases, leading to a decrease in the positive pressure at the outlet of the fully premixed gas proportional control valve. Since both the positive pressure formed by the gas at the outlet and the negative pressure formed by the reduced power of the negative pressure device decrease simultaneously, the pressure at the outlet remains constant.

[0057] The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the embodiments described. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.

Claims

1. A fully premixed gas proportional regulating valve, characterized in that, include: The regulating assembly includes a housing, a first valve, and a second valve. The housing has a first cavity, a second cavity, and a third cavity. The first cavity communicates with the second cavity, and the first valve is located between the first cavity and the second cavity. A voltage stabilizing assembly includes a bracket, a voltage stabilizing diaphragm, a third valve, and a fourth valve. The bracket is detachably connected to the housing and forms a voltage stabilizing chamber together with the voltage stabilizing diaphragm. The voltage stabilizing chamber is connected to a second chamber and a third chamber. The third valve is located between the voltage stabilizing chamber and the second chamber. The voltage stabilizing diaphragm is driven to the third valve to open or block the passage between the voltage stabilizing chamber and the second chamber. The fourth valve is located between the voltage stabilizing chamber and the third chamber. The servo assembly includes a servo box, a servo valve, a first channel, and a second channel. The servo box is detachably connected to the housing and is connected to the voltage stabilizing diaphragm to form a servo cavity. The second cavity is connected to the servo cavity through the first channel. The second valve is located between the first channel and the second cavity. The third cavity is connected to the servo cavity through the second channel. The servo valve is located between the third cavity and the second channel.

2. The fully premixed gas proportional control valve according to claim 1, characterized in that, The voltage stabilizing assembly also includes a sealing gasket, which is disposed between the housing and the bracket.

3. The fully premixed gas proportional regulating valve according to claim 1, characterized in that, The third valve includes a third sealing element, a pressure regulating rod, and a third spring. The pressure regulating rod passes through the bracket, with one end having an abutment portion that abuts against the pressure stabilizing diaphragm, and the other end connected to the third sealing element and extending into the second cavity. One end of the third spring is connected to the abutment portion, and the other end is connected to the bracket. The third sealing element is used to block the passage between the second cavity and the pressure stabilizing cavity.

4. The fully premixed gas proportional regulating valve according to claim 3, characterized in that, The third sealing member has an arc surface protruding towards the pressure stabilizing chamber. When the third valve is in the closed state, the arc surface of the third sealing member abuts against the bracket.

5. The fully premixed gas proportional control valve according to claim 3, characterized in that, The third valve also includes a pressure plate, which is disposed between the abutment portion and the pressure stabilizing diaphragm. The pressure stabilizing diaphragm has a protrusion, and the pressure plate has a slot, with the protrusion engaging with the slot.

6. The fully premixed gas proportional control valve according to claim 1, characterized in that, The fourth valve includes an adjusting bolt, a fourth sealing element, a support element, and a fourth spring. The fourth sealing element is connected to the adjusting bolt and is used to block the passage between the third cavity and the pressure stabilizing cavity. The support element is connected to the bracket. One end of the fourth spring abuts against the fourth sealing element, and the other end abuts against the support element. The adjusting bolt is connected to the housing.

7. The fully premixed gas proportional regulating valve according to claim 6, characterized in that, The fourth sealing component includes a sealing part and a connecting part. The adjusting bolt is driven to one end of the connecting part, and the other end of the connecting part passes through the support member and is slidably connected to the support member. The sealing part is located on the outside of the connecting part, and the fourth spring is sleeved on the outside of the connecting part and abuts against the sealing part.

8. The fully premixed gas proportional regulating valve according to claim 1, characterized in that, The servo valve includes a servo bolt, a servo spring, a servo diaphragm, and a servo valve seat. The servo valve seat is detachably connected to the housing. The servo valve seat has a pressure relief chamber, which communicates with the second channel and the third cavity respectively. The servo bolt is threadedly connected to the servo valve seat and extends out of the servo valve seat. One end of the servo spring abuts against the servo bolt, and the other end abuts against the servo diaphragm. The servo diaphragm is used to block the passage between the second channel and the pressure relief chamber.

9. The fully premixed gas proportional regulating valve according to claim 1, characterized in that, The first valve includes a first sealing element, a first moving rod, and a first driving source. The first driving source is connected to the housing, the first moving rod is connected to the first sealing element, and the first driving source is drivingly connected to the first moving rod to drive the first moving rod to move relative to the housing and drive the first sealing element to open or block the passage between the first cavity and the second cavity.

10. The fully premixed gas proportional control valve according to claim 1, characterized in that, The second valve includes a second plugging element, a second moving rod, and a second driving source. The second driving source is connected to the housing, and the second moving rod is connected to the second plugging element. The second driving source is drivingly connected to the second moving rod to drive the second moving rod to move relative to the housing and drive the second plugging element to open or block the passage between the second cavity and the first channel.

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