阅读说明：本技术 燃气比例阀 (Gas proportional valve ) 是由 不公告发明人 于 2018-07-31 设计创作，主要内容包括：燃气比例阀包括主阀座,主阀座设有进口和出口,燃气由所述进口流入由所述出口流出,主阀座固定连接有电磁驱动装置,电磁驱动装置设有腔体,电磁驱动装置包括外壳、导磁铁芯、永磁体以及导磁体,所述燃气安全装置还包括分流装置,所述分流装置包括阀体和控制件,阀体与主阀口的出口部固定连接,控制件与阀体固定连接,所述分流装置具有腔体,腔体容纳有导流件,该结构能够进一步提升对燃气的控制,实现节能效果。(The gas proportional valve includes the main valve seat, and the main valve seat is equipped with import and exports, the gas by import inflow by the export flows, main valve seat fixedly connected with electromagnetic drive device, and electromagnetic drive device is equipped with the cavity, and electromagnetic drive device includes shell, magnetic core, permanent magnet and magnetizer, the gas safety device still includes diverging device, diverging device includes valve body and control, the exit portion fixed connection of valve body and main valve mouth, control and valve body fixed connection, diverging device has the cavity, and the cavity holds the water conservancy diversion spare, and this structure can further promote the control to the gas, realizes energy-conserving effect.)

1. The gas proportional valve is characterized by comprising a main valve seat, wherein the main valve seat is provided with an inlet and an outlet, gas flows in from the inlet and flows out from the outlet, the main valve seat is fixedly connected with an electromagnetic driving device, the electromagnetic driving device is provided with a cavity, the electromagnetic driving device comprises a shell, a magnetic conductive iron core, a permanent magnet and a magnetizer, the shell at least comprises a magnetic conductive part, the magnetic conductive part comprises a top wall part and a side wall part, the top wall part is fixedly connected with the magnetic conductive iron core, the permanent magnet and the magnetizer are positioned in the cavity, the peripheral part of the magnetic conductive iron core is provided with a moving coil component, the moving coil component can reciprocate along the axis direction of the magnetic conductive iron core, the permanent magnet is sleeved on the peripheral part of the magnetizer, the permanent magnet is positioned between the side wall part and the magnetizer, and the permanent, the gas proportional valve further comprises a flow dividing device, the flow dividing device comprises a first valve body and at least 2 control pieces, the first valve body is fixedly connected with an outlet portion of the main valve seat, the control pieces are fixedly connected with the first valve body, the flow dividing device is provided with a first cavity, a first flow guide piece is contained in the cavity, and the first flow guide piece comprises a first flow guide portion and a second flow guide portion.

2. The gas proportioning valve of claim 1 wherein the control member includes a first control member and a second control member, the first valve body is provided with a first connection port and a second connection port, the first connection port is fixedly connected with the first control member, the second connection port is fixedly connected with the second control member, and the first control member and the second control member are symmetrically arranged with respect to a radial central axis of the first valve body.

3. The gas proportioning valve of claim 2 wherein the first control member has a first valve plug and the second control member has a second valve plug, the first valve plug being movable toward or away from a first valve port and the second valve plug being movable toward or away from a second valve port, the flow divider having a first flow passage and a second flow passage.

4. The gas proportioning valve of claim 3 wherein a portion of the first flow guide and at least a portion of the first valve body form a first flow guide and a second flow guide, and another portion of the first flow guide and at least another portion of the first valve body form the first valve port and the second valve port.

5. The gas safety device according to claim 4, wherein the gas proportional valve has a three-stage combustion mode, when the first valve plug is relatively far from the first valve port and the second valve plug is abutted against the second valve port, the gas enters the first flow guide channel through the first valve port, when the second valve plug is relatively far from the second valve port and the first flow split is abutted against the first valve port, the gas enters the second flow guide channel through the second valve port, and when the first flow split is relatively far from the first valve port and the second valve plug is relatively far from the second valve port, the gas enters the first flow guide channel and the second flow guide channel through the first valve port and the second valve port, respectively.

6. The gas proportional valve is characterized by comprising a main valve seat, wherein the main valve seat is provided with an inlet and an outlet, gas flows in from the inlet and flows out from the outlet, the main valve seat is fixedly connected with an electromagnetic driving device, the electromagnetic driving device is provided with a cavity, the electromagnetic driving device comprises a shell, a magnetic conductive iron core, a permanent magnet and a magnetizer, the shell at least comprises a magnetic conductive part, the magnetic conductive part comprises a top wall part and a side wall part, the top wall part is fixedly connected with the magnetic conductive iron core, the permanent magnet and the magnetizer are positioned in the cavity, the peripheral part of the magnetic conductive iron core is provided with a moving coil component, the moving coil component can perform reciprocating motion along the axis direction of the magnetic conductive iron core, the peripheral part of the magnetizer is sleeved with the permanent magnet, and the permanent magnet is positioned between the side wall, the permanent magnet with the magnetizer is not direct contact, the gas safety device still includes diverging device, diverging device includes second valve body and third controlling piece, the second valve body with the exit part fixed connection of main valve mouth, the third controlling piece with second valve body fixed connection, diverging device has the second cavity, the second cavity holds the second water conservancy diversion spare, the second water conservancy diversion spare includes third water conservancy diversion portion and fourth water conservancy diversion portion.

7. The gas safety device according to claim 6, wherein the second valve body is provided with a third connection interface provided with the third control member provided with a third valve plug which can be close to or remote from a third valve port, and the flow dividing device is provided with a third flow guiding channel and a fourth flow guiding channel.

8. The gas safety device according to claim 7, wherein a portion of the second flow guide and at least a portion of the second valve body constitute the third flow guide and the fourth flow guide, and another portion of the second flow guide and at least another portion of the second valve body constitute the third valve port.

9. The gas safety device of claim 8, wherein the gas proportional valve has a two-stage combustion mode, when the third valve plug abuts against the third valve port, the gas enters the second cavity and then enters a combustion chamber through the fourth flow guide channel, when the third valve plug is relatively far away from the third valve port, a part of the gas enters the third flow guide channel through the third valve port, and another part of the gas enters the combustion chamber through the fourth flow guide channel.

10. The gas proportional valve according to any one of claims 1-9, further comprising at least one electromagnetic driving assembly, wherein the gas proportional valve is provided with a cavity, the cavity accommodates a pressure difference adjusting device, the electromagnetic driving assembly dominates the safety switch action of the gas proportional valve, the electromagnetic driving device and the pressure difference adjusting device dominate the gas flow adjusting action of the gas proportional valve, the main valve seat comprises a first valve port, a second valve port and a main valve port, the first valve port corresponds to the electromagnetic driving assembly, the second valve port corresponds to the electromagnetic driving device, and the main valve port corresponds to the pressure difference adjusting device.

Technical Field

The invention relates to the technical field of gas control, in particular to a gas proportional valve applied to a gas appliance.

Background

The gas proportional valve generally gets into the main valve mouth through the differential pressure valve by the gas through the import and flows out, flow to the combustion chamber through the export is final, the user generally all hopes to replace according to the season and can reach a comparatively comfortable temperature environment during the use, and under the higher service environment of temperature, actually required power and gas flow are less relatively, and the gas that flows out by the export still all flows to the combustion chamber and then arouses the condition that the temperature is crossed and scald easily and influence the customer and use the comfort, consequently, how to promote the control to gas flow, it is the technical problem that technical staff in the field awaits a great deal with to solve to reduce the energy waste.

Disclosure of Invention

The invention mainly aims to provide a gas safety device which can relatively improve the control on the gas flow and reduce the energy waste.

The invention provides a fuel gas proportional valve, which comprises a main valve seat, wherein the main valve seat is provided with an inlet and an outlet, fuel gas flows in from the inlet and flows out from the outlet, the main valve seat is fixedly connected with an electromagnetic driving device, the electromagnetic driving device is provided with a cavity, the electromagnetic driving device comprises a shell, a magnetic conductive iron core, a permanent magnet and a magnetizer, the shell at least comprises a magnetic conductive part, the magnetic conductive part comprises a top wall part and a side wall part, the top wall part is fixedly connected with the magnetic conductive iron core, the permanent magnet and the magnetizer are positioned in the cavity, the peripheral part of the magnetic conductive iron core is provided with a moving coil assembly, the moving coil assembly can reciprocate along the axial direction of the magnetic conductive iron core, the permanent magnet is sleeved on the peripheral part of the magnetizer, the permanent magnet is positioned between the side wall part and the magnetizer, the permanent magnet, the first valve body is fixedly connected with the outlet part of the main valve seat, the control part is fixedly connected with the first valve body, the flow dividing device is provided with a first cavity, the cavity is provided with a first flow guide part, and the first flow guide part comprises a first flow guide part and a second flow guide part.

The invention also provides a fuel gas proportional valve, which comprises a main valve seat, wherein the main valve seat is provided with an inlet and an outlet, fuel gas flows in from the inlet and flows out from the outlet, the main valve seat is fixedly connected with an electromagnetic driving device, the electromagnetic driving device is provided with a cavity, the electromagnetic driving device comprises a shell, a magnetic conductive iron core, a permanent magnet and a magnetizer, the shell at least comprises a magnetic conductive part, the magnetic conductive part comprises a top wall part and a side wall part, the top wall part is fixedly connected with the magnetic conductive iron core, the permanent magnet and the magnetizer are positioned in the cavity, the peripheral part of the magnetic conductive iron core is provided with a moving coil assembly, the moving coil assembly can reciprocate along the axial direction of the magnetic conductive iron core, the permanent magnet is sleeved on the peripheral part of the magnetizer, the permanent magnet is positioned between the side wall part and the magnetizer, the second valve body is fixedly connected with the outlet part of the main valve port, the third control part is fixedly connected with the second valve body, the flow dividing device is provided with a second cavity, the second cavity is provided with a second flow guide part, and the second flow guide part comprises a third flow guide part and a fourth flow guide part.

According to the invention, the gas installation device is provided with the flow dividing device, the gas flows out of the outlet and then enters the cavity of the flow dividing device, the flow of the gas flowing out of the outlet can be further regulated through the control part of the flow dividing device, the control of the gas flow can be relatively improved, and the energy waste is reduced.

Drawings

FIG. 1 is a cross-sectional view of the overall structure of one embodiment of the gas proportional valve provided by the invention;

FIG. 2 is a cross-sectional view of another embodiment of the gas proportional valve provided by the present invention;

FIG. 3 is a cross-sectional view of an electromagnetic driving device of a gas proportional valve provided by the invention

Detailed Description

Fig. 1 shows a gas proportional valve structure according to a first embodiment of the present invention, which includes a main valve seat 1, the main valve seat 1 is provided with an inlet 1a and an outlet 1b, gas flows in from the inlet 1a and flows out from the outlet 1b, the main valve seat 1 can be formed by aluminum alloy die-casting, the main valve seat 1 is fixedly connected with an electromagnetic driving component 2, a servo driving component 3 and an electromagnetic driving device 4, the inner cavity of the main valve seat 1 is provided with a pressure difference adjusting device 5, the main valve seat 1 is further provided with a first valve port 11, a second valve port 13 and a main valve port 14 corresponding to the valves, the electromagnetic driving component valve 2 and the servo driving component 3 mainly have the function of gas safety switching, the electromagnetic driving device 4 and the pressure difference adjusting device 5 mainly have the function of gas flow adjustment, it needs to be explained that the number of the servo driving devices and the electromagnetic driving components can be increased according to system requirements, and only two safety switching.

The gas proportional valve comprises an electromagnetic driving device, the specific structure of the electromagnetic driving device 4 is described in detail below with reference to fig. 3, the electromagnetic driving device 4 comprises a housing 40 and a magnetic conductive core 44, the housing 40 at least comprises a magnetic conductive portion, the magnetic conductive portion comprises a top wall portion 401 and a side wall portion 402, the top wall portion 401 is fixedly connected with the magnetic conductive core 44, a moving coil assembly 43 is arranged on the outer periphery of the magnetic conductive core 44, the moving coil assembly 43 can reciprocate along the axial direction of the magnetic conductive core 44, the electromagnetic driving device 4 is provided with a cavity 48, the electromagnetic driving device 4 further comprises a permanent magnet 41 and a magnetic conductor 42, the permanent magnet 41 and the magnetic conductor 42 are located in the cavity 48, the permanent magnet 41 and the magnetic conductor 42 are located on the outer periphery of the moving coil assembly 43, the housing 40 substantially covers the permanent magnet 41 and the magnetic conductor 42, the permanent magnet 41 is sleeved on the outer periphery of the magnetic conductor 42, the, the permanent magnet 41 is not in direct contact with the magnetic conductor 42. Specifically, the casing 40 is respectively and substantially formed into the cavity 48 of the electromagnetic driving device 4 by being fixedly connected with the magnetic conductive iron core 44 and the cover plate 47, the casing at least includes a magnetic conductive portion, which is a component having magnetic conductivity, the casing 40 may only include the magnetic conductive portion, that is, the whole casing 40 may be formed by punching a magnetic conductive metal plate, the casing 40 may also be made of low-carbon steel or other magnetic conductive materials, or the magnetic conductive portion may also be injection-molded into the casing 40 by using an insert and a plastic piece or other materials, only by ensuring that the casing 40 has magnetic conductivity, the whole casing 40 is substantially in a cylindrical structure, the magnetic conductive iron core 44 is formed by turning a pure iron or low-carbon steel magnetic conductive material, the top wall portion 401 of the magnetic conductive portion and the magnetic conductive iron core 44 may be fixedly connected by welding or riveting, and the electromagnetic driving device 4 includes the moving coil assembly 43, the moving coil assembly 43 includes an excitation wire group 431 and a wire frame 432, the excitation wire group 431 is fixedly connected with the wire frame 432, the permanent magnet 41 and the magnetizer 42 are located in the cavity 48, and the permanent magnet 41 and the magnetizer 42 are located at the outer periphery of the moving coil assembly 43, the casing 40 with permeability substantially covers the permanent magnet 41 and the magnetizer 42, as shown in fig. 3, the whole permanent magnet 41 can be a substantially hollow ring structure, the permanent magnet 41 can be a unitary ring structure or a split ring structure, the permanent magnet 41 is provided with an inner ring surface and an outer ring surface, the permanent magnet 41 further includes an outer diameter magnetic pole portion 411 and an inner diameter magnetic pole portion 412, the outer diameter magnetic pole portion 411 is relatively close to the outer ring surface, the inner diameter magnetic pole portion 412 is relatively close to the outer ring surface, the side wall 402 of the casing 40 substantially surrounds the outer ring surface of the permanent magnet 41, the magnetizer 42 substantially surrounds the inner ring surface of, the inner magnetic pole portion 412 is attached to the outer wall of the magnetizer 42, and it should be noted that the attachment herein means that the two may be abutted or a certain gap may be left as long as the permanent magnet 41 is ensured not to fall off, when the outer magnetic pole portion 411 is an N pole and the inner magnetic pole portion 412 is an S pole, the N pole is transmitted to the magnetic core 44 through the shell 40 having magnetic permeability and is looped from the magnetic core 44 to the S pole to form a relatively closed-loop permanent magnetic circuit form, and the magnetic force is performed in the cavity 48 during the transmission process.

The casing 40 at least includes a magnetic conductive portion, the magnetic conductive portion includes a top wall portion 401 and a side wall portion 402, the top wall portion 401 is fixedly connected to the magnetic conductive core 44, the side wall portion 402 substantially encloses the outer periphery of the permanent magnet 41, the permanent magnet 41 is not directly contacted to the magnetic conductor 42, a first distance L1 is formed between the top wall portion 401 and the upper end surface of the permanent magnet 41, the first distance L1 is configured to prevent the N pole of the outer diameter magnetic pole portion 411 from directly returning to the magnetic conductor 42 when being transmitted through the casing 40 having magnetic conductivity, a second distance L2 is formed between the magnetic conductor 42 and the side wall of the magnetic conductive core 44, in detail, a second distance L2 is formed between the magnetic conductor boss of the magnetic conductor 42 and the side wall of the magnetic conductive core 44, it should be noted that the top wall portion 401 is connected to the side wall portion 402 in this embodiment, and the step portion abuts against the upper end surface of the permanent magnet 41, and, the top wall portion 401 and the side wall portion 402 are directly connected, and other structures that can be changed or extended according to this embodiment only need to ensure that a first interval L1 is formed between the top wall portion 401 and the upper end surface of the permanent magnet 41, the field winding 431 of the moving coil assembly 43 is located between the magnetizer boss and the magnetizer core 44, the first interval L1 is greater than the second interval L2, the magnetic force can be concentrated on the magnetizer boss of the magnetizer 42 during magnetic force transmission, so that the magnetic force is finally more concentrated on the second interval L2, a mutual repulsive force or a traction force is generated between the axial magnetic field generated by the moving coil assembly 43 in the energized state and the radial magnetic field formed at the second interval L2 and corresponding to the axial magnetic field, because the magnetic force is more concentrated on the second interval L2, the field 431 can induce enough magnetic force to drive the moving coil assembly 43 to reciprocate along the axial direction of the magnetizer core 44 as a whole, because the first distance L1 is greater than the second distance L2, according to the principle that the closer the distance is, the more easily the magnetic flux is gathered, the outer diameter magnetic pole portion 411 is transferred from the side wall portion 402 of the housing 40 to the magnetic conductive core 44 through the step portion and the top wall portion 401 during the magnetic force transfer process, because the first distance L1 is greater than the second distance L2, the magnetic force is more easily gathered toward the second distance L2, similarly, the inner diameter magnetic pole portion 412 gathers the magnetic force on the magnetic conductive body boss during the magnetic force transfer process, because the first distance L1 is greater than the second distance L2, the magnetic flux leakage of the magnetic force toward the first distance L1 is reduced, that is, the magnetic loss is relatively reduced, that is, the magnetic force finally concentrated on the second distance L2 toward the first distance L1 is relatively reduced, the magnetic loss enhancement, the magnetic conduction and the magnetic gathering effect can be reduced, and the finally the transferred electromagnetic force can be relatively increased, so that the moving coil assembly 43 can generate enough magnetic thrust to reciprocate along the axial direction of the magnetic, further improving the precision of the valve plug and the reliability of the overall actuation of the electromagnetic driving device.

Briefly describing the permanent magnet 41 and the magnetizer 42, the permanent magnet 41 is a hollow ring structure, and can be processed by setting more than one inner and outer radial magnetizing modes, in this embodiment, taking a permanent magnet 41 as an example, the permanent magnet 41 includes an outer diameter magnetic pole portion 411 and an inner diameter magnetic pole portion 412, the outer diameter magnetic pole portion 411 and the inner diameter magnetic pole portion 412 of the permanent magnet 41 are two different magnetic poles, the outer diameter magnetic pole portion 411 is attached to the inner wall of the casing 40, i.e. the inner wall of the sidewall portion 402, the inner diameter magnetic pole portion 412 is attached to the outer wall of the magnetizer 42, the magnetizer 42 is located between the moving coil assembly 43 and the permanent magnet 41, the excitation line group 431 is located between the magnetic boss 42a and the magnetic core 44 during the axial lifting process of the line holder 432, the magnetizer 42 may be an integral or split structure, in this embodiment, when the magnetizer 42 is a split structure, the magnetizer includes a first magnetizer 421 and a second magnetizer 422, the first magnetizer 421 has a first magnetizer boss 421a, the second magnetizer 422 has a second magnetizer boss 422a, the first magnetizer 421 and the second magnet 422 are symmetrically disposed, and the first magnetizer boss 421a is attached to the second magnetizer boss 422 a; when the magnetizer 42 is a split structure, at least one of the third magnetizer and the fourth magnetizer is provided with a magnetic conductive boss, the magnetizer 42 can be processed and formed as an integral structure, it should be noted that besides the above manners, the structure of the magnetizer 42 may have other extensible schemes, which should also be considered in the protection scope required by the present invention, in the embodiment provided by the present invention, the outer diameter magnetic pole portion 411 transmits the magnetic force to the magnetic conductive iron core 44 through the casing 40 as the magnetizer, the first magnetizer boss 421a and the second magnetizer boss 422a form a second distance L2 with the side wall of the magnetic conductive iron core 44, the inner diameter magnetic pole portion 412 transmits the magnetic force to the magnetic conductive iron core through the first magnetizer boss 421a and the second magnetizer boss 422a to form a circular magnetic circuit configuration in the inner cavity 48 of the electromagnetic driving device 4, .

The casing 40 further includes an extending portion 403 extending outward from the sidewall portion 402, the electromagnetic driving device 4 further includes a cover plate 47, the cover plate 47 includes a parallel portion 471 and a protruding portion 472, the parallel portion 471 and the extending portion 403 are matched and can be provided with corresponding screw holes, the casing 40 and the cover plate 47 can be fixedly connected by screws or welding, the casing 40 respectively and fixedly connected with the magnetic core 44 and the cover plate 47 substantially form a cavity 48 of the electromagnetic driving device, in order to achieve better positioning of the permanent magnet 41 in the cavity 48, the electromagnetic driving device 4 is further provided with a sheath assembly 46, the sheath assembly 46 can be an insulating member, the sheath assembly 46 is formed by injection molding of a plastic member, and is used for protecting and positioning the permanent magnet 41 to prevent the permanent magnet from moving in the axial direction, the sheath assembly 46 includes a first sheath 461 and a second sheath 462, the first sheath 461 is located at a first distance L1, and the first sheath 461 abuts against the upper end faces of the top wall portion 401 and the permanent magnet 41, the second sheath 462 abuts against the lower end surface of the permanent magnet 41, and the protruding portion 472 of the cover plate 47 abuts against the second sheath 462. The sheath assembly limits the axial direction of the permanent magnet 41 to prevent the permanent magnet from moving in the axial direction.

The electromagnetic driving device further comprises a valve plug 4b, the valve plug 4b comprises a valve plug body 41b and a diaphragm 42b, the electromagnetic driving device 4 further comprises an adjusting mechanism 45, the adjusting mechanism 45 adjusts the initial position of the wire frame 432, the adjusting mechanism 45 comprises an adjusting rod 451, a spring seat 452 and a spring 453, the adjusting rod 451 is screwed into the magnetic conduction iron core 44 to adjust the initial position of the wire frame 432, the spring seat 452 is fixed on an end boss of the adjusting rod 451, and the spring 453 is assembled on the spring seat 452 and an inner boss of the wire frame 432. The moving coil assembly 43 comprises an excitation wire group 431 and a wire frame 432, the excitation wire group 431 is fixedly mounted on the wire frame 432, the wire frame 432 comprises a wire frame head 432a, the wire frame head 432a can be abutted and matched with the valve plug 4b, the adjusting mechanism 45 adjusts the initial position of the wire frame 432, the excitation wire group 431 generates an axial magnetic field after a direct-current power supply is connected, a second interval L2 with concentrated magnetic force has a radial magnetic field relative to the axial magnetic field, the axial magnetic field and the radial magnetic field interact to form axial traction force or repulsive force to drive the moving coil assembly 43 to reciprocate along the axial direction of the magnetic conductive iron core 44, and the moving coil assembly 43 can drive the valve plug 4b to move axially downwards.

The gas proportional valve shown in fig. 1 further includes a flow divider, the flow divider is fixedly connected to the outlet portion 1d of the main valve seat 1, in this embodiment, the flow divider includes a first valve body 8 and at least 2 control elements, the first valve body 8 is fixedly connected to the outlet portion 1d of the main valve seat 1, specifically, fixedly connected by way of screw-thread fit or welding, and the control element is fixedly connected to the first valve body 8, the control element includes a first control element 6 and a second control element 7, the flow divider includes a first cavity 81, the gas flows into the first cavity 81 after flowing out from the outlet 1b, the control element can further adjust the flow rate of the gas, it should be noted that, according to the system requirements, the control elements may be set to 2 or more, in this embodiment, 2 control elements are set for illustration, the first valve body 8 is fixedly connected to the outlet portion 1d, the flow divider has a first cavity 81, the gas flows out from the outlet 1b into the first cavity 81, the first cavity 81 accommodates a first flow guiding element 82, the first flow guiding element is substantially in a T shape, the first valve body 8 is provided with a convex portion 8a, the convex portion 8a is fixedly connected with the outlet 1d, the first flow guiding element 82 comprises a first flow guiding portion 82a and a second flow guiding portion 82b, the first flow guiding portion 82a can temporarily block the gas flow from the outlet 1b and then introduce the gas flow into the first valve port 61 and/or the second valve port 71, the first valve body 8 is provided with a first connecting interface 83 and a second connecting interface 84, the first connecting interface 83 is fixedly connected with a first control element 6, the second connecting interface 84 is fixedly connected with a second control element 7, the first control element 6 and the second control element 7 are symmetrically arranged with the radial central axis of the first valve body 8 as a boundary, the first valve plug 6 is provided with a first valve plug 6a, the second control element 7 is provided with a second valve plug 7a, under the excitation action, the first valve plug 6a can be close to or far away from the first valve port 61 to adjust the gas flow passing through the valve port, the second valve plug 7a can be close to or far away from the second valve port 71 to adjust the gas flow passing through the valve port, the gas safety device can lead a gas safety switch through the electromagnetic driving assembly 2, the first control element 6 and the second control element 7, the device of a servo valve can be omitted, when one of the three valves fails, the other two valves can still achieve the safety closing of the gas valves, and the double safety protection effect is achieved. The gas proportional valve provided by the embodiment has a three-stage combustion mode, when the first valve plug 6A is relatively far away from the first valve port 61, and the second valve plug 7a is abutted against the second valve port 71, gas enters the first diversion channel 6A through the first valve port 61 and then enters the combustion chamber; when the second branch flow 7A is relatively far away from the second valve port 71 and the first valve plug 6a is abutted against the first valve port 61, the fuel gas enters the second diversion channel 7A through the second valve port 71 and then enters the combustion chamber; when the first valve plug 6A is relatively far away from the first valve port and the second valve plug 7A is relatively far away from the second valve port 71, the gas from the outlet 1b passes through the first cavity 81 and then enters the first flow guide channel 6A and the second flow guide channel 7A through the first valve port 61 and the second valve port 71, respectively. Through adding the flow dividing device in the gas safety device, three gas flow control modes can be carried out after gas flows out from the outlet 1b, different requirements can be met by arranging the flow dividing device in a three-section type combustion mode, when a client uses a water heater or a wall-mounted furnace in summer, the actual using power is low due to high temperature in summer, the required gas flow flowing to a combustion chamber is low, the temperature which is comfortable for the user can be achieved by controlling the first control element 6 to carry out small flow regulation relative to the first valve port 61 or the second control element 7 to carry out small flow regulation relative to the second valve port 71, when the gas safety device is used in winter, the gas flow which flows to the combustion chamber is high due to generally low temperature in winter and relatively high actual using power in summer, the gas flow which flows to the combustion chamber is relatively high compared with that in summer, the first control element 6 can be relatively far away from the first valve port 61 and the second control element 7 can be relatively far away from the second valve port 71 to increase Temperature, set up this diverging device promptly, can realize multistage burning mode, realize summer low power, the operation mode of winter high power has improved the control by temperature change precision and the gas flow control range to the temperature, and each section all can freely be adjusted the firepower, has improved the degree of freedom to gas flow control greatly, has reduced the consumption of the energy. A part of the first fluid guide 82 and at least a part of the first valve body 8 form a first fluid guide channel 6A and a second fluid guide channel 7A, and another part of the first fluid guide 82 and at least another part of the first valve body 8 form a first valve port 61 and a second valve port 71. In the background art, the fuel gas flow which flows out from the main valve port 14 directly enters the combustion chamber through the outlet 1b, a customer directly enters the combustion chamber through the outlet 1b when the temperature is high in summer in the using process, the finally generated actual water temperature is high, the customer experience effect is poor, in the link, the fuel gas flow directly enters the combustion chamber through the outlet 1b, further free adjustment on the fuel gas flow can not be performed, the flow from the outlet 1b can be supplied and adjusted in a segmented mode again by adding the flow dividing device of the flow dividing device, three fuel gas flow control modes can be performed after the fuel gas flows out from the outlet 1b, namely, a three-segment type combustion mode of the fuel gas can be realized, the flow adjustment precision and the temperature control precision are further improved, the energy consumption is reduced, and the adjustment mode of low power, high power and high power in summer.

Referring to the gas proportional valve shown in fig. 2, the gas proportional valve provided in this embodiment has a two-stage combustion mode, which is different from the first embodiment, in which the flow dividing device of this embodiment only includes a control member structure, the flow dividing device in this embodiment includes a second valve body 8' and a third control member 9, the gas safety device in this embodiment can use the electromagnetic driving assembly 2, the servo driving assembly 3 and the third control member 9 to control the safety switch function, when one of the three valves fails, the other two valves can still achieve the safety closing of the gas valve, so as to achieve the double safety protection function, the outlet portion 1d of the main valve seat 1 is fixedly connected with the second valve body 8', the third control member is fixedly connected with the second valve body 8', the flow dividing device has a second cavity 81', the second cavity 81' accommodates a second flow guiding member 82', and the second flow guiding member 82' is generally L-shaped, the second flow guiding member 82' includes a third flow guiding portion 82a ' and a fourth flow guiding portion 82B ', a portion of the second flow guiding member 82a ' and at least a portion of the second valve body 8' form a third port 91, another portion of the second flow guiding member 82B ' and at least another portion of the second valve body 8' form a third flow guiding passage 9A and a fourth flow guiding passage 9B, the third valve plug 9A of the third control member 9 can approach or separate from the third port 91 to adjust the flow rate of the gas from the outlet portion 1d ' in stages, when the third valve plug 9A abuts against the third port 91, that is, when the third control member 9 is in the closed state, the gas from the outlet portion 1d enters the second valve chamber 81' and then enters the combustion chamber through the fourth flow guiding passage 9B, and when the third valve plug 9A is relatively separated from the third port 91, a portion of the gas from the outlet portion 1d ' enters the second valve chamber 81' and then enters the third flow guiding passage 9A through the third port 91, the other part enters the combustion chamber through the fourth diversion passage 9B, and the effect of the diversion device related to the two-stage combustion mode by providing the diversion device is described in detail in this embodiment, and is not described in detail herein.

The above is only the preferred embodiment of the present invention, it should be noted that the ordinal numbers such as "first, second, third, fourth" and the like "mentioned in the present invention are only naming manners of the respective components, and do not relate to the limitation of the order of the respective components, and the azimuthal words such as" up "and" down "and the like referred to in the present invention are naming manners of the respective components according to the drawings of the specification provided by the present invention, and a multi-stage combustion mode of the gas flow can be realized by providing a flow dividing device at an outlet portion of a main valve seat of a gas proportional valve, and the multi-stage combustion mode herein is not limited to the preferred embodiment provided by the present invention, and the degree of freedom of the gas flow can be greatly improved by other multi-stage combustion modes, and the gas flow flowing to the combustion chamber can be further adjusted by the multi-stage combustion adjustment mode of the flow dividing device, so that the firepower of the combustion chamber can be, the temperature control precision and the flow rate regulation range are improved, the energy consumption can be reduced, and a better energy saving effect can be achieved.