CN110778770A

CN110778770A - Gas proportional valve and electromagnetic driving device thereof

Info

Publication number: CN110778770A
Application number: CN201810855825.XA
Authority: CN
Inventors: 不公告发明人
Original assignee: Zhejiang Sanhua Intelligent Controls Co Ltd
Current assignee: Zhejiang Sanhua Intelligent Controls Co Ltd
Priority date: 2018-07-31
Filing date: 2018-07-31
Publication date: 2020-02-11
Anticipated expiration: 2038-07-31
Also published as: CN110778770B; WO2020024920A1

Abstract

The gas proportional valve provided by the invention comprises an electromagnetic driving device, the electromagnetic driving device comprises a first spring assembly and a second spring assembly, the first spring assembly comprises a first reed, the first reed comprises a first fixing part and a first elastic part, the second spring assembly comprises a second reed, the second reed comprises a second fixing part and a second elastic part, the first reed is fixedly connected with the end part of a first wire frame of the wire frame through the first elastic part, the second reed is fixedly connected with the end part of a second wire frame of the wire frame through the second elastic part, and the first spring assembly and the second spring assembly are arranged to reduce the radial shake of a moving coil assembly and relatively improve the actuating reliability of the electromagnetic driving device.

Description

Gas proportional valve and electromagnetic driving device thereof

Technical Field

The invention relates to the technical field of electromagnetic drive control and gas control, in particular to a gas proportional valve and an electromagnetic drive device thereof.

Background

The gas proportional valve includes electromagnetic drive device, and it includes moving coil subassembly and valve plug, moves the coil subassembly and carries out axial elevating movement through receiving magnetic induction when circular telegram, moves the coil subassembly and can drive the valve plug and carry out axial motion in order to adjust the gas flow of flowing through the valve port, moves the coil subassembly and moves the phenomenon that the in-process if take place to move the coil subassembly and shake towards radial at the high frequency, then can arouse the product to actuate unreliable phenomenon.

Disclosure of Invention

The invention mainly aims to provide a gas proportional valve and an electromagnetic driving device thereof, wherein a moving coil assembly can reduce the radial shaking phenomenon during the actuation, and the actuation reliability of the gas proportional valve is relatively improved.

The gas proportional valve comprises a main valve seat and an electromagnetic driving device, wherein the main valve seat is provided with a valve port, the electromagnetic driving device can approach or be far away from the valve port, the electromagnetic driving device comprises a shell, a movable coil assembly, a magnetic conduction iron core, a permanent magnet, a magnetizer, a first reed assembly and a second reed assembly, the shell at least comprises a magnetic conduction part, the magnetic conduction part comprises a top wall part, the movable coil assembly comprises a wire frame, the wire frame comprises a first wire frame end part and a second wire frame end part, the first reed assembly comprises a first reed, a second reed comprises a first fixing part and a first elastic part connected with the first fixing part, the second reed comprises a second fixing part and a second elastic part connected with the second fixing part, the first wire frame end part is fixedly connected with the first elastic part, the second wire frame end part is fixedly connected with the second elastic part, and the first fixing part is fixedly connected with the magnetic conduction iron core, or the first fixing part is directly or indirectly abutted against the top wall part and the first fixing part, or the first fixing part is directly or indirectly abutted against the top wall part and the permanent magnet and the magnetizer, and the second fixing part is directly or indirectly abutted against the magnetizer or the second fixing part and the permanent magnet and the magnetizer.

The electromagnetic driving device comprises a movable coil assembly, wherein the movable coil assembly comprises a coil frame, the coil frame comprises a first coil frame end part and a second coil frame end part, the electromagnetic driving device further comprises a first spring assembly and a second spring assembly, the first spring assembly comprises a first reed, the second spring assembly comprises a second reed, the first reed is fixedly connected with the first coil frame end part, and the second reed is fixedly connected with the second coil frame end part.

The gas proportional valve comprises a main valve seat and an electromagnetic driving device, wherein the main valve seat is provided with a valve port, the electromagnetic driving device can be close to or far from the valve port, the electromagnetic driving device comprises a shell, a movable coil assembly, a magnetic conduction iron core, a permanent magnet, a first spring assembly and a second spring assembly, the shell at least comprises a magnetic conduction part, the magnetic conduction part comprises a top wall part, the movable coil assembly comprises a wire frame, the wire frame comprises a first wire frame end part and a second wire frame end part, the first spring assembly comprises a first spring, the second spring assembly comprises a second spring, the first spring comprises a first fixing part and a first elastic part connected with the first fixing part, the second spring comprises a second fixing part and a second elastic part connected with the second fixing part, the first wire frame end part is fixedly connected with the first elastic part, the second wire frame end part is fixedly connected with the second elastic part, and the first fixing part is fixedly connected with the magnetic conduction, or the first fixing part is directly or indirectly abutted against the top wall part and the permanent magnet, and the second fixing part is directly or indirectly abutted against the permanent magnet.

The electromagnetic driving device comprises a first spring assembly and a second spring assembly, wherein the first spring assembly comprises a first spring, the first spring comprises a first fixing piece and a first elastic piece, the second spring assembly comprises a second spring, the second spring comprises a second fixing piece and a second elastic piece, the first elastic piece is fixedly connected with the end part of a first bobbin of the bobbin, the second elastic piece is fixedly connected with the end part of a second bobbin of the bobbin, the first spring and the second spring can be driven to axially move together when the moving coil assembly is actuated, the first spring and the second spring can provide elastic support for the actuation of the moving coil assembly, the radial shaking of the moving coil assembly can be reduced, and the actuation reliability of the electromagnetic driving device is relatively improved.

Drawings

FIG. 1 is a schematic view of the gas proportioning valve provided by the present invention;

FIG. 2 is a schematic cross-sectional view of an electromagnetic driving device provided in the present invention;

FIG. 3 is a schematic structural diagram of a first spring plate of the electromagnetic driving device according to the present invention;

FIG. 4 is a schematic structural diagram of a second spring plate of the electromagnetic driving device provided by the present invention;

FIG. 5 is a perspective view of a bobbin structure of the electromagnetic driving device provided by the present invention;

FIG. 6 is a schematic perspective view of a first spring assembly and a second spring assembly of the electromagnetic driving device according to the present invention

Detailed Description

The gas proportional valve as shown in fig. 1 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 differential pressure regulating device 5, the main valve seat 1 is further provided with a first valve port 11, a second valve port 12, a valve port 13 and a main valve port 14 corresponding to the above valves, the gas proportional valve can be used by the electromagnetic driving component 2 and the servo driving component 3 to lead a gas safety switch, when one of the two is powered off or two are powered off simultaneously, the gas flow is cut off, the electromagnetic driving device 4 and the differential pressure regulating device 5 lead the gas flow regulating function, the opening of the differential pressure regulating device 5 is indirectly driven by controlling the supply current of the electromagnetic The gas enters the first channel 15 and the second channel 16 through the second valve port 12 after passing through the first valve port 11, the gas flows out from the third valve port 13 and is discharged to the outlet 1b through the pressure relief hole 17 because the third valve port 13 is in a normally open state, and the outlet 1b is connected with the combustion chamber.

As shown in fig. 1 in conjunction with fig. 2, the electromagnetic drive 4 includes a housing 40, a magnetically permeable core 44, the housing 40 comprises at least a magnetically permeable portion, comprising a top wall portion 401 and a side wall portion 402, the top wall portion 401 is fixedly connected with the magnetic conductive iron core 44, the outer peripheral portion of the magnetic conductive iron core 44 is provided with a moving coil assembly 43, the moving coil assembly 43 can reciprocate along the axis line of the magnetic conductive iron core 44, the electromagnetic driving device 4 is provided with a cavity 48, the electromagnetic driving device 4 further includes a permanent magnet 41 and a magnetizer 42, the permanent magnet 41 and the magnetizer 42 are located in the cavity 48, the permanent magnet 41 and the magnetizer 42 are located at the outer periphery of the moving coil assembly 43, the casing 40 approximately covers the permanent magnet 41 and the magnetizer 42, the permanent magnet 41 is sleeved at the outer periphery of the magnetizer 42, the permanent magnet 41 is located between the side wall portion 402 and the magnetizer 42, and the top wall portion 401 is not directly contacted with the magnetizer 42. Specifically, the casing 40 is respectively and substantially connected with the magnetic conductive iron core 44 and the cover plate 47 to form the cavity 48 of the motor 4, the casing 40 has magnetic conductivity and at least includes a magnetic conductive portion, 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 be used as an insert and injection-molded with a plastic piece or other materials to form the casing 40, only the casing 40 needs to have 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 casing 40 and the magnetic conductive iron core 44 may be fixedly connected by welding or riveting, the electromagnetic driving device 4 includes a moving coil assembly 43, the moving coil assembly 43 includes an excitation line group 431, the field line group 431 is fixedly connected with the line frame 432, the permanent magnet 41 and the magnetizer 42 are positioned in the cavity 48, the permanent magnet 41 and the magnetizer 42 are positioned at the periphery of the moving coil assembly 43, the permanent magnet 41 and the magnetizer 42 are approximately covered as the shell 40 with the magnetic conduction function, the whole permanent magnet 41 can be an approximately hollow annular structure, the permanent magnet 41 can be an integral annular structure or a split annular structure, the permanent magnet 41 is provided with an inner annular surface and an outer annular surface, the permanent magnet 41 further comprises an outer diameter magnetic pole part 411 and an inner diameter magnetic pole part 412, the outer diameter magnetic pole part 411 is relatively close to the outer annular surface, the inner diameter magnetic pole part 412 is relatively close to the outer annular surface, the side wall part 402 of the shell 40 approximately surrounds the outer annular surface of the permanent magnet 41, the magnetizer 42 approximately surrounds the inner annular surface of the permanent magnet 41, the outer diameter magnetic pole part 411 is attached to the side wall, 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, when the outer diameter magnetic pole portion 411 is an N pole and the inner diameter magnetic pole portion 412 is an S pole, the N pole is transmitted to the magnetic permeable iron core 44 through the casing 40 having magnetic permeability and is looped from the magnetic permeable iron core 44 to the S pole, the S pole of the inner diameter magnetic pole portion 412 is returned to the N pole through the magnetic permeable boss of the magnetic conductor 42 by gathering magnetism through the magnetic permeable iron core 44 to form a closed-loop permanent magnetic circuit shape, and the magnetic force is performed in the cavity 48 during the transmission process.

The housing 40 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 located between the side wall portion 402 and the magnetic conductor 42, the top wall portion 401 is not directly contacted to the magnetic conductor 42 and forms a first distance L1 with the upper end surface of the magnetic conductor 42, a second distance L2 is formed between the magnetic conductive boss of the magnetic conductor 42 and the side wall of the magnetic conductive core 44, it should be noted that in this embodiment, the top wall portion 401 is connected to the side wall portion 402 through a step portion 404, the step portion abuts against the upper end surface of the permanent magnet 41, the step portion can be eliminated, 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 the embodiment only need to ensure a certain distance between the top wall portion 401 and the upper end surface of the, the exciting wire group 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 converged on the magnetizer boss of the magnetizer 42 during magnetic force transmission to finally concentrate on the second interval L2, mutual repulsion force or traction force is generated between the axial magnetic field generated by the moving coil assembly 43 and the radial magnetic field formed at the second interval L2 and corresponding to the axial magnetic field, because the magnetic force is concentrated on the second interval L2, the exciting wire group 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 interval L1 is greater than the second interval L2, the outer diameter magnetic pole portion 411 is transmitted to the magnetizer core step portion 44 from the side wall portion 402 and the top wall portion 401 of the housing 40 during magnetic force transmission according to the principle that the closer distance is easier to concentrate on the magnetic force, because the first distance L1 is greater than the second distance L2, the magnetic force is more easily concentrated toward the second distance L2, and also the bore magnetic pole portion 412 concentrates the magnetic force on the magnetic conductor boss during the magnetic force transmission process, and 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, i.e., the magnetic force is finally concentrated on the second distance L2 and is relatively reduced toward the magnetic force concentrated toward the first distance L1, so that the magnetic loss is reduced, the magnetic permeability is enhanced, the magnetic concentration effect is reduced, and the electromagnetic force transmitted by the magnetic flux leakage phenomenon is improved, so that the electromagnetic force can be relatively increased to enable the moving coil assembly 43 to generate enough magnetic thrust to reciprocate along the axial direction of the magnetic core 44 to drive the valve plug to move, thereby further improving the actuation precision and the reliability of the overall actuation of the electromagnetic driving apparatus.

Briefly describing the permanent magnet 41 and the magnetizer 42, the permanent magnet 41 is a hollow ring structure, and can be processed by more than one inner and outer radial magnetizing, in this embodiment, taking a permanent magnet 41 as an example, the permanent magnet 41 includes an outer diameter magnetic pole part 411 and an inner diameter magnetic pole part 412, the outer diameter magnetic pole part 411 and the inner diameter magnetic pole part 412 of the permanent magnet 41 are two different magnetic poles, the outer diameter magnetic pole part 411 is attached to the inner wall of the casing 40, i.e. the inner wall of the sidewall part 402, the inner diameter magnetic pole part 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 conductive boss and the magnetic conductive iron core 44 during the axial lifting along with the bobbin 432, the magnetizer 42 includes, in this embodiment, when the magnetizer 42 is a split structure, it 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 423 and the fourth magnetizer 424 is provided with a magnetic conductive boss, the magnetizer 42 may be integrally formed, and it should be noted that besides the above manners, the structure of the magnetizer 42 may also have other extendable schemes, which should 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 serving 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 an annular magnetic circuit pattern in the inner cavity 48 of the motor 4, .

The casing 40 further includes an extending portion 403 extending outward from the sidewall portion 402 of the magnetic conductive portion, 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 forms a cavity 48 of the electromagnetic driving device by the fixed connection with the magnetic conductive iron core 44 and the cover plate 47, in order to achieve better positioning of the permanent magnet 41 in the cavity 48, the motor 4 is further provided with a sheath assembly 46, the sheath assembly 46 can be an insulating member, the sheath assembly 46 is provided by injection molding of a plastic member, and is used for protecting and positioning the permanent magnet 41 and preventing 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 is respectively connected with the top wall portion 401 and the permanent magnet 41 and/or The upper end faces abut against each other, the second sheath 462 abuts against the table top at the lower end of the permanent magnet 41 and/or the magnetizer 42, and the protruding part 472 of the cover plate 47 abuts against the second sheath 462. The sheath assembly 46 limits the axial direction of the permanent magnet 41 to prevent the permanent magnet from moving in the axial direction.

The electromagnetic driving device comprises a valve plug 4b, wherein 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.

As shown in fig. 3 and 4 in combination with fig. 2, the electromagnetic driving device 4 further includes a first spring assembly 51 and a second spring assembly 52, the first spring assembly 51 includes a first spring 51a and a first covering member 51b, the second spring assembly 52 includes a second spring 52a and a second covering member 52b, the first spring 51a includes a first fixing member and a first elastic member connected to the first fixing member, the first elastic member is connected to the first fixing member and is capable of axially moving with respect to the first fixing member, the second spring 52a includes a second fixing member and a second elastic member connected to the second fixing member, the second elastic member is connected to the second fixing member and is capable of axially moving with respect to the second fixing member, the first spring assembly is located above the bobbin 432, the second spring assembly is located below the bobbin 432, the bobbin 432 includes a first bobbin end 4321 and a second bobbin end 4322, the bobbin 432 is generally cylindrical, the first bobbin end 4321 is located above the bobbin 432, the second bobbin end 4322 is located below the bobbin 432, the first bobbin end 4321 is provided with a first bobbin end protrusion 4321a extending upward, the second bobbin end 4322 is provided with a second bobbin end protrusion 4322a extending downward, in one embodiment, the first spring of the first spring 51a is fixedly connected with the first bobbin end 4321, the second spring of the second spring 52a is fixedly connected with the second bobbin end 4322, the bobbin 432 is axially moved by the elastic supporting function of the first spring and the second spring, the first covering 51b can cover the first fixing member by plastic insulation or rubber insulation, the second covering 52b can cover the second fixing member by plastic insulation or rubber insulation, the first spring 51a and the second spring 52a are etched or stamped from thin elastic metal plate, the first spring leaf 51a may be a separate structure or an integrally formed structure, the second spring leaf 52a may also be a separate structure or an integrally formed structure, the first spring leaf 51a and the second spring leaf 52a may be made of stainless steel or bronze material, the first covering member 51b and the second covering member 52b may be made of rubber or plastic material, in this embodiment, the first spring leaf 51a and the second spring leaf 52a have the same structure, the specific structure of the first spring leaf 51a will be described below by taking the first spring leaf assembly 51 as an example, the first spring leaf 51a includes a first inner positioning ring 511, a first outer positioning ring 512 and a first elastic portion 513, a first elastic portion 513 is disposed between the first inner positioning ring 511 and the first outer positioning ring 512, the first inner positioning ring 511 and the first outer positioning ring 512 are elastically connected by the first elastic portion 513 are substantially arc-shaped structures and extend around the first inner positioning ring 511 and the first outer positioning ring 512, the first elastic part 513 has a first end 5131 and a second end 5132, the first end 5131 is connected to the outer peripheral wall of the first inner positioning ring 511, the second end 5132 is connected to the inner peripheral wall of the first outer positioning ring 512, the first end 5131 and the second end 5132 have a first end gap S1, the first elastic part 513 is connected to the first inner positioning ring 511 by a first inner clearance groove 5111, the first elastic part 513 is connected to the first outer positioning ring 512 by a first outer clearance groove 5121, the first elastic part in this embodiment includes the first inner positioning ring 511 and the first elastic part 513, the first fixing part includes the first outer positioning ring 512, it should be noted that the first inner positioning ring 511, the second outer positioning ring 512 and the first elastic part 513 may be integrally formed or separately formed and then connected, and the first elastic part is fixedly connected to the first bobbin end 4321, specifically, the first inner positioning ring 511 is fixedly connected to the first bobbin end 4321, the first inner positioning ring 511 is provided with a first positioning hole 511a, the first positioning hole 511a is matched with the first bobbin end protrusion 4321a, the first inner positioning ring 511 and the first bobbin end protrusion 4321a can be fixedly connected by a welding positioning or riveting process, the second spring leaf 52a comprises a second inner positioning ring 521, a second outer positioning ring 522 and a second elastic portion 523, the second elastic member comprises a second inner positioning ring 521 and a second elastic portion 523, the second fixing member comprises a second outer positioning ring 522, the second elastic member is fixedly connected to the second bobbin end 4322, specifically, the second inner positioning ring 521 is fixedly connected to the second bobbin end 4322, the second inner positioning ring 521 is provided with a second positioning hole 521a, the second positioning hole 521a is matched with the second bobbin end protrusion 4322a, the second positioning ring 521 is fixedly connected to the second bobbin end protrusion 4322a by a welding positioning or riveting process, the second elastic portion 523 has a third end 5231 and a fourth end 5232, a second end gap S2 is formed between the third end 5231 and the fourth end 5232, a second inner gap groove 5211 is formed between the second elastic portion 523 and the second inner positioning ring 521, and a second outer gap groove 5221 is formed between the second elastic portion 523 and the second outer positioning ring 522.

When the first inner positioning ring 511 and the second inner positioning ring 521 axially move relative to the first outer positioning ring 512 and the second outer positioning ring 522, the first elastic part 513 of the first elastic part and the second elastic part 523 of the second elastic part provide elastic support for the axial movement of the moving coil assembly 43, and are fixedly connected to the first bobbin end 4321 through the first elastic part and the second bobbin end 4322 through the second elastic part, that is, when the moving coil assembly 43 is actuated, the first inner positioning ring 511 and the second inner positioning ring 521 can be driven to move together, and the first spring leaf 51a and the second spring leaf 52a have a certain elastic support effect on the axial direction of the moving coil assembly 43, so that the moving coil assembly is always kept in the axial direction to prevent the moving coil assembly from swinging towards the radial direction, and because of the existence of the first elastic part 513 and the second elastic part 523, the movable coil assembly 43 can provide elastic support for the movable coil assembly 43 when it is actuated, and the movable coil assembly 43 can perform relatively precise stroke control when it is actuated, so as to further improve the gas flow regulation range of the electromagnetic driving device, improve the position regulation or thrust regulation precision of the movable coil assembly 43, and the movable coil assembly 43 is always kept in axial actuation to avoid the situation of radial shaking, so as to further prevent the situation of friction between the movable coil assembly 43 and the magnetic conductive iron core 44 and other parts, and overcome the problem that the movable coil assembly may shake radially due to no axial positioning in the high-frequency actuation process in the background art, thereby causing unreliable actuation of the electromagnetic driving device and even the gas proportional valve.

In this embodiment, the first inner positioning ring 511 is fixedly connected to the first bobbin end protrusion 4321a, the second inner positioning ring 521 is fixedly connected to the second bobbin end protrusion 4322a, the first outer positioning ring 512 is further provided with a first auxiliary hole 512a, the first cladding 51b is adhered to the first auxiliary hole 512a to cover the first outer positioning ring 512, the second outer positioning ring 522 is further provided with a second auxiliary hole 522a, the second cladding 52b is adhered to the second auxiliary hole 522a to cover the second outer positioning ring 522, the first cladding 51b is located at the first interval L1, the first fixing member, i.e., the first outer positioning ring 512, indirectly abuts against the top wall portion 401 through the first cladding 51b and indirectly abuts against the magnetizer 42, or the first fixing member, i.e., the first outer positioning ring 512, indirectly abuts against the top wall portion 401 through the first cladding 51b and indirectly abuts against the magnetizer 42 and the upper end portion of the permanent magnet 41, and the second fixing member, i.e., the second outer positioning ring 522, indirectly abuts against the permanent magnet 41 and the upper end portion of the magnetizer 42 through the second cladding 52b The lower end of the second cladding member 52b is indirectly abutted, or the second fixing member, i.e., the second outer positioning ring 522 is indirectly abutted through the second cladding member 52b and the lower end of the magnetizer, and the electromagnetic driving apparatus further includes a cover plate 47, the cover plate 47 is fixedly connected with the housing 40, the cover plate 47 includes a flat plate portion 471 and a protruding portion 472, and the protruding portion 472 presses the second cladding member 52 b. The covering member 51b and the second covering member 52b may be made of an insulating material such as rubber or plastic, and are used for insulating the housing 40 to prevent the first spring 51a and the second spring 52a from being too close to the housing 40 to generate a magnetic convergence effect.

In the above solution, if the first covering member 51b and the second covering member 52b are not provided, the first fixing member and the second fixing member may also be positioned, the first fixing member, i.e., the first outer positioning ring 512, is clamped by the top wall portion 401 and the magnetic conductor 42 to be fixed, and the first fixing member, i.e., the first outer positioning ring 512, directly abuts against the top wall portion 401 and the magnetic conductor 42; or the first fixing member, that is, the first outer positioning ring 512, is clamped by the top wall portion 401, the permanent magnet 41, and the magnetic conductor 42 together to be fixed, and the first fixing member, that is, the first outer positioning ring 512, directly abuts against the top wall portion 401, the permanent magnet 41, and the magnetic conductor 42, specifically, the first outer positioning ring 512 directly abuts against the top wall portion 401 and the magnetic conductor 42, or the first outer positioning ring 512 directly abuts against the top wall portion 401, the permanent magnet 41, and the magnetic conductor 42.

The electromagnetic driving device of the gas proportional valve can also eliminate the arrangement of the magnetizer 42, namely, the electromagnetic driving device comprises a shell 40, a magnetic core 44, a permanent magnet 41, a first reed assembly 51 and a second reed assembly 52, in the scheme, a first reed 51a indirectly abuts against the top wall part 401 through a first cladding part 51b and indirectly abuts against the permanent magnet 41, a second reed 52a indirectly abuts against the lower end part of the permanent magnet 41 through a second cladding part 52b, and if the first cladding part 51b and the second cladding part 52b are not arranged, the first fixing part and the second fixing part can also be positioned, namely, the first reed 51a is clamped and fixed by the top wall part 401 and the permanent magnet 41, the first reed 51a directly abuts against the top wall part 401 and the permanent magnet 41, the second reed 52a directly abuts against the lower end part of the permanent magnet 41, specifically, a first outer positioning ring 512 directly abuts against the top wall part 401 and the upper end part of the permanent magnet 41, the second outer positioning ring 522 abuts directly against the lower end of the permanent magnet 41.

The number of the first elastic parts 513 and the number of the first end gaps S1 are set to be more than 2, the number of the second elastic parts 523 and the number of the second end gaps S2 are also set to be more than 2, the 2 first elastic parts 513 and the 2 second elastic parts 523 are set to be equivalent to 2 stable support points, the stability of the axial movement position is improved in the process of actuating the moving coil assembly 43, the swinging of the axial movement position in the radial direction and the friction phenomenon with inner and outer parts are prevented, the first spring assembly 51 and the second spring assembly 52 need to be arranged simultaneously when the moving coil assembly 43 is axially positioned, and the technical scheme of the embodiment can be applied to linear movement mechanisms with smaller stroke requirements and linear motor position adjustment with high accuracy requirements.

The present invention is described in another embodiment, which is different from the previous embodiment in the matching manner of the first spring 51a, the second spring 52a and the structure of the previous embodiment and the matching manner of other components, in this embodiment, the first fixing element is changed into the first inner positioning ring 511, the first elastic element is changed into the first outer positioning ring 512, the first fixing element, i.e. the first inner positioning ring 511 and the magnetic core 44 are fixedly connected, the first outer positioning ring 512 is provided with a positioning hole which is matched with the first bobbin end 4321 of the bobbin 432, and the first outer positioning ring 512 and the first bobbin end 4321 are fixedly connected, it should be noted that the first outer positioning ring 512, the first inner positioning ring 511 and the first elastic portion may be integrally formed or formed by separately machining and then connecting them together, the bobbin 432 drives the first outer positioning ring 512 to axially move together, the first elastic portion 513 provides an elastic supporting function to enable the first outer positioning ring 512 to perform axial lifting motion relative to the first inner positioning ring 511, when the moving coil assembly 43 performs actuation along the axial direction of the magnetic conductive iron core 44, the wire frame 43 can bring the first outer positioning ring 512, i.e. the first elastic member, and the second inner positioning ring 521, i.e. the second elastic member, to perform axial motion together, and the first fixing member and the second fixing member are both positioned, and the first spring leaf 51a and the second spring leaf 52a can provide a certain positioning action for the axial direction of the moving coil assembly 43, so as to prevent the moving coil assembly from shaking in the radial direction, so as to relatively reduce friction with the magnetic conductive iron core 44, and relatively improve the actuation reliability of the electromagnetic driving device and the gas proportional valve having the electromagnetic driving device, and the structure and the function of the related spring leaves are not described.

As shown in fig. 2, the motor 44 further includes a sheath assembly 46, the sheath assembly 46 may be made of an insulating material, on one hand, the sheath assembly 46 can better position the permanent magnet 41 in the inner cavity of the housing, the sheath assembly 46 is used for protecting and positioning the permanent magnet 41 to prevent axial movement of the permanent magnet 41, on the other hand, the sheath assembly 46 can position the first spring assembly 51 and the second spring assembly 52, 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 can block contact between the magnetizer 42 and the top wall 401, an upper end of the first sheath 461 abuts against the top wall 401 of the housing 40, the first sheath 461 abuts against at least a part of an upper end surface of the permanent magnet 41, the protruding portion 472 of the cover plate 47 presses against the second sheath 462 to abut against at least a part of a lower end of the permanent magnet 41, and the sheath assembly 46 limits the axial direction of the permanent magnet 41 to prevent axial movement of the permanent magnet 41 in the axial direction. Wherein the first sheath 461 comprises a first annular body provided with a recessed second step 4611; the second sheath 462 comprises a second annular body provided with a recessed second step 4621. The first covering member 51b is provided with a first matching part 511b, the second covering member 52b is provided with a second matching part 521b, the first stepped part 4611 is in abutting fit with the first matching part 511b of the first covering member 51b to position the first spring piece assembly 51 at the first interval L1, the first matching part 511b is a stepped part provided on the first covering member 51b, and the first covering member 51b can abut against at least another part of the upper end surface of the permanent magnet 41; the second stepped portion 4621 is in abutting engagement with the second engagement portion 521b of the second covering member 52b to position the second spring assembly 52 at the lower end portion of the permanent magnet 41, the second engagement portion 511b is provided at the stepped portion of the first covering member 511b, the second covering member 52b can be in abutment with at least another part of the platform surface of the permanent magnet 41, it should be noted that the first spring assembly 51 may be located at a position opposite to the first sheath 461, may be located at a position above the first sheath 461, and the second spring assembly 52 may be located at a position below the second sheath 462. The electromagnetic driving device provided by the invention comprises a first spring assembly and a second spring assembly, wherein the first spring assembly comprises a first reed, the first reed comprises a first fixing piece and a first elastic piece, the second spring assembly comprises a second reed, the second reed comprises a second fixing piece and a second elastic piece, the first elastic piece is fixedly connected with the first rack end of the wire rack, the second elastic piece is fixedly connected with the second rack end of the wire rack, the wire rack can drive the first elastic piece and the second elastic piece to move axially together, the first reed and the second reed provide certain axial positioning actuation for the coil holder during axial movement, the possibility that the moving coil assembly shakes in the radial direction can be reduced, friction between the moving coil assembly and the magnetic conduction iron core is reduced, and the actuation reliability of the electromagnetic driving device and the gas proportional valve with the electromagnetic driving device is relatively improved.

The above is only a preferred embodiment of the present invention, it should be noted that the related ordinal numbers such as "first" and "second" mentioned in the present application are merely used to name the related components and should not be considered as limitations on the related sequences of the components, and the same reference to the directional words such as "inner" and "outer" also refers to the description of the drawings provided in the present application, and the reed structure provided in the present application is not limited to the structure of the electromagnetic driving device provided in several embodiments of the present application, and can also be applied to other structures of the electromagnetic driving device.

Claims

1. The gas proportional valve is characterized by comprising a main valve seat (1) and an electromagnetic driving device, wherein the main valve seat (1) is provided with a valve port (13), the electromagnetic driving device can be close to or far away from the valve port (13), the electromagnetic driving device comprises a shell (40), a moving coil assembly (43), a magnetic conductive iron core (44), a permanent magnet (41), a magnetic conductor (42), a first reed assembly (51) and a second reed assembly (52), the shell (40) at least comprises a magnetic conductive part which comprises a top wall part (401), the moving coil assembly (43) comprises a wire frame (432), the wire frame (432) comprises a first wire frame end part (4321) and a second wire frame end part (4322), the first reed assembly (51) comprises a first reed (51a), the second reed assembly (52) comprises a second reed (52a), the first spring plate (51a) comprises a first fixing piece and a first elastic piece connected with the first fixing piece, the second spring plate (52a) comprises a second fixing piece and a second elastic piece connected with the second fixing piece, the first coil holder end part (4321) is fixedly connected with the first elastic part, the second coil holder end part (4322) is fixedly connected with the second elastic part, the first fixing part is fixedly connected with the magnetic conductive iron core (44), or the first fixing piece is directly or indirectly abutted against the top wall part (401) and the magnetizer (42), or the first fixing piece is directly or indirectly abutted against the top wall part (401) and the permanent magnet (41) and the magnetizer (42), the second fixing piece is directly or indirectly abutted against the magnetizer (42) or the permanent magnet (41) and the magnetizer (42).

2. Gas proportioning valve according to claim 1 wherein the first reed (51a) comprises a first inner positioning ring (511), a first outer positioning ring (512) and a first resilient part (513), the first inner positioning ring (511) and the first outer positioning ring (512) being resiliently connected by the first resilient part (513).

3. Gas proportional valve according to claim 2, wherein said first elastic portion (513) is of an arc-like configuration and extends along said first inner positioning ring (511) and said first outer positioning ring (512), the first elastic part (513) has a first end part (5131) and a second end part (5132), the first end part (5131) is connected with the peripheral wall of the first inner positioning ring (511), the second end portion (5132) is connected with the inner peripheral wall of the first outer positioning ring (512), a first end gap (S1) between the first end (5131) and the second end (5132), a first inner clearance groove (5111) is arranged between the first elastic part (513) and the first inner positioning ring (511), a first outer clearance groove (5121) is formed between the first elastic part (513) and the first outer positioning ring (512).

4. Gas proportional valve according to claim 3, characterized in that said first end gap (S1) and said first elastic portion (513) are provided in more than 2 numbers.

5. The gas proportional valve of claim 3, wherein the first bobbin end (4321) is provided with a first bobbin end protrusion (4321a), the first resilient member comprises the first outer positioning ring (512) and a first resilient portion (513), the first securing member comprises the first inner positioning ring (511), the first outer positioning ring (512) is fixedly connected to the first bobbin end protrusion (4321a), the first inner positioning ring (511) is fixedly connected to the magnetic core (44), and the first outer positioning ring (512) and the bobbin (432) together perform an axial movement relative to the first inner positioning ring (511).

6. Gas proportioning valve according to claim 3 wherein the first bobbin end (4321) is provided with a first bobbin end projection (4321a), the first elastic element comprises the first inner positioning ring (511) and a first elastic part (513), the first fixing piece comprises the first outer positioning ring (512), the first inner positioning ring (511) is fixedly connected with the first bobbin end part bulge (4321a), the first spring element (51) comprises a first cladding (51b), the first outer positioning ring (512) is abutted against the top wall part (401) through the first cladding (51b), and the first outer positioning ring (512) is indirectly abutted against the magnetizer (42) or the permanent magnet (41) and the magnetizer (42), the first inner positioning ring (511) and the wire stand (432) move axially together relative to the first outer positioning ring (512).

7. The gas proportional valve according to claim 6, wherein said first inner positioning ring (511) has a first positioning hole (511a), said first positioning hole (511a) is fitted with said first bobbin end protrusion (4321a), said first outer positioning ring (512) is provided with a first auxiliary hole (512a), and said first wrapping member (51b) is bonded with said first auxiliary hole (512a) to wrap said first outer positioning ring (512).

8. The gas proportional valve of claim 1, wherein the second reed (52a) comprises a second inner positioning ring (521), a second outer positioning ring (522), and a second resilient portion (523), the second resilient portion (523) having a third end (5231) and a fourth end (5232), a second end gap (S2) between the third end (5231) and the fourth end (5232), a second inner clearance groove (5211) between the second resilient portion (523) and the second inner positioning ring (521), and a second outer clearance groove (5221) between the second resilient portion (523) and the second outer positioning ring (522).

9. The gas proportional valve according to claim 8, wherein the second bobbin end (4322) is provided with a second bobbin end protrusion (4322a), the second elastic member comprises the second inner positioning ring (521) and the second elastic portion (523), the second fixing member comprises the second outer positioning ring (522), the second inner positioning ring (521) is fixedly connected with the second bobbin end protrusion (4322a), the second spring assembly (52) comprises a second cladding (52b), and the second outer positioning ring (522) indirectly abuts against the magnetic conductor (42) or the permanent magnet (41) and the magnetic conductor (42) through the second cladding (52 b).

10. The gas proportional valve according to claim 1, characterized in that the electromagnetic drive device further comprises a jacket assembly (46), the jacket assembly (46) comprises a first jacket (461) and a second jacket (462), the first spring assembly (51) comprises a first cladding (51b), the second spring assembly (52) comprises a second cladding (52b), the jacket assembly (46) can be made of insulating material, the first jacket (461) has a first stepped portion (4611), the second jacket (462) has a second stepped portion (4621), the first stepped portion (4611) is in abutting fit with the first fitting portion (511b), and the second stepped portion (4621) is in abutting fit with the second fitting portion (521 b).

11. The gas proportioning valve of claim 10 wherein a first spacing (L1) is formed between the top wall portion (401) and the magnetic conductor (42), the first sheath (461) and the first cladding (51b) being located at the first spacing (L1).

12. Gas proportioning valve according to claim 10, wherein said electromagnetic drive further comprises a cover plate (47), said housing (40) being fixedly connected to said cover plate (47), said cover plate (47) abutting against said second sheath (462).

13. The gas proportional valve is characterized by comprising a main valve seat (1) and an electromagnetic driving device, wherein the main valve seat (1) is provided with a valve port (13), the electromagnetic driving device can be close to or far away from the valve port (13), the electromagnetic driving device comprises a shell (40), a moving coil assembly (43), a magnetic conductive iron core (44), a permanent magnet (41), a first reed assembly (51) and a second reed assembly (52), the shell (40) at least comprises a magnetic conductive part which comprises a top wall part (401), the moving coil assembly (43) comprises a wire frame (432), the wire frame (432) comprises a first wire frame end part (4321) and a second wire frame end part (4322), the first reed assembly (51) comprises a first reed (51a), the second reed assembly (52) comprises a second reed (52a), the first reed (51a) comprises a first elastic piece connected with the first fixing piece, the second reed (52a) includes the second mounting and with the second elastic component that the second mounting links to each other, first line frame tip (4321) with first elastic component fixed connection, second line frame tip (4322) with second elastic component fixed connection, first mounting with magnetic conduction iron core (44) fixed connection, perhaps first mounting with top wall portion (401) and permanent magnet (41) directly or indirectly offset, the second mounting with permanent magnet (41) directly or indirectly offset.

14. The electromagnetic driving device is characterized by comprising a moving coil assembly (43), wherein the moving coil assembly (43) comprises a wire frame (432), the bobbin (432) comprises a first bobbin end (4321) and a second bobbin end (4322), the electromagnetic drive device further comprises a first spring assembly (51) and a second spring assembly (52), the first spring assembly (51) comprises a first spring leaf (51a), the second spring assembly (52) comprises a second spring leaf (52a), the first reed (51a) is fixedly connected with the first bobbin end part (4321), the second reed (52a) is fixedly connected with the second bobbin end part (4322), the first reed (51a) is the first reed (51a) of any one of claims 2-7, the second reed (52a) is any one of the second reeds (52a) of claims 8-9.