CN110486527B - Pilot-operated type moving coil fuel gas proportional valve - Google Patents
Pilot-operated type moving coil fuel gas proportional valve Download PDFInfo
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- CN110486527B CN110486527B CN201910708775.7A CN201910708775A CN110486527B CN 110486527 B CN110486527 B CN 110486527B CN 201910708775 A CN201910708775 A CN 201910708775A CN 110486527 B CN110486527 B CN 110486527B
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- coil
- moving coil
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- 239000002737 fuel gas Substances 0.000 title claims abstract description 67
- 230000001105 regulatory effect Effects 0.000 claims abstract description 34
- 230000001276 controlling effect Effects 0.000 claims abstract description 18
- 239000007789 gas Substances 0.000 claims description 25
- 235000014676 Phragmites communis Nutrition 0.000 claims description 18
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 9
- 238000003466 welding Methods 0.000 claims description 3
- 239000010985 leather Substances 0.000 abstract description 10
- 238000007789 sealing Methods 0.000 description 10
- VGVIKVCCUATMNG-UHFFFAOYSA-N 1,2,4-trichloro-5-phenylbenzene Chemical compound C1=C(Cl)C(Cl)=CC(Cl)=C1C1=CC=CC=C1 VGVIKVCCUATMNG-UHFFFAOYSA-N 0.000 description 5
- 238000010073 coating (rubber) Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000033228 biological regulation Effects 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000005284 excitation Effects 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
- F16K31/0644—One-way valve
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
- F16K31/0675—Electromagnet aspects, e.g. electric supply therefor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
- F16K31/36—Actuating devices; Operating means; Releasing devices actuated by fluid in which fluid from the circuit is constantly supplied to the fluid motor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
- F16K31/42—Actuating devices; Operating means; Releasing devices actuated by fluid by means of electrically-actuated members in the supply or discharge conduits of the fluid motor
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Magnetically Actuated Valves (AREA)
Abstract
The invention discloses a pilot-type moving coil fuel gas proportional valve, which comprises a valve body, wherein the valve body is provided with a fuel gas inlet and a fuel gas outlet, a fuel gas flow passage for fuel gas flow is formed between the fuel gas inlet and the fuel gas outlet, the fuel gas flow passage comprises a first fuel gas main flow passage, a pilot flow passage and a second fuel gas main flow passage, a shut-off valve assembly for controlling the opening and the closing of the fuel gas flow passage and a pressure regulating device for regulating the flow of the second fuel gas main flow passage are arranged in the valve body, the shut-off valve assembly is controlled by an electromagnetic coil and comprises a first control valve for controlling the opening and the closing of the first fuel gas main flow passage, a pilot control valve for controlling the opening and the closing of the pilot flow passage and a second control valve for controlling the opening and the closing of the second fuel gas main flow passage; the pressure regulating device comprises a regulating leather film and a moving coil regulator, and is simple in structure, and stable and reliable in product performance.
Description
Technical Field
The invention relates to the technical field of fuel gas proportional valves, in particular to a pilot-operated moving coil fuel gas proportional valve.
Background
At present, a main control valve is used for controlling the opening and closing of a fuel gas main runner, and a pilot control valve is used for controlling the opening and closing of a pilot runner, so that two driving coils are required to be arranged for driving the main control valve and the pilot control valve, the cost of a product can be increased, and the complexity of the structure of the product can be increased.
In addition, the existing pilot-operated fuel gas proportional valve is generally provided with a pressure regulating device, but when the movable iron core of the pressure regulating device acts, the movable iron core of the pressure regulating device is easy to contact with the shell of the pressure regulating device and generates friction, so that pressure return difference is caused, normal operation of the pressure regulating device is influenced, and a large electromagnetic coil is required to be arranged for driving the movable iron core of the pressure regulating device to act, so that poor product performance and high cost are caused.
Disclosure of Invention
The invention aims to solve one of the problems existing in the prior related art at least to a certain extent, and therefore, the invention aims to provide a pilot-type moving coil fuel gas proportional valve which is simple in structure and stable and reliable in product performance.
The above object is achieved by the following technical scheme:
the pilot-type moving coil fuel gas proportional valve comprises a valve body, wherein the valve body is provided with a fuel gas inlet and a fuel gas outlet, a fuel gas flow passage for fuel gas flow is formed between the fuel gas inlet and the fuel gas outlet, the fuel gas flow passage comprises a first fuel gas main flow passage, a pilot flow passage and a second fuel gas main flow passage, a shut-off valve assembly for controlling the opening and closing of the fuel gas flow passage and a pressure regulating device for regulating the flow of the second fuel gas main flow passage are arranged in the valve body, and the shut-off valve assembly is controlled by an electromagnetic coil and comprises a first control valve for controlling the opening and closing of the first fuel gas main flow passage, a pilot control valve for controlling the opening and closing of the pilot flow passage and a second control valve for controlling the opening and closing of the second fuel gas main flow passage;
the pressure regulating device comprises a regulating leather film and a moving coil regulator, wherein the regulating leather film is fixed on the valve body, a proportion regulating cavity is formed between the regulating leather film and the valve body, the proportion regulating cavity is communicated with the pilot runner, the moving coil regulator comprises a moving coil shell, a magnet core plate, a permanent magnet, a magnet guide plate and a moving coil group, the moving coil shell is fixed on the valve body, the magnet core plate, the permanent magnet and the magnet guide plate are sequentially arranged in the moving coil shell to form a magnetic loop, a magnet guide part is formed at the center of the magnet core plate, an annular magnetic passage is formed between the magnet guide part and the magnet guide plate, an opening is formed at one end of the moving coil shell close to the proportion regulating cavity, the moving coil group is arranged in the opening and the magnetic passage, a reed is connected between the moving coil group and the opening, and the moving coil group is suspended in the magnetic passage through the reed.
Further, in order to better realize the invention, a leather film seat is arranged at the center of the adjusting leather film, the moving coil group comprises a moving coil and a coil PCB, wherein the moving coil and the coil PCB are fixed on the reed, the moving coil is suspended in the magnetic passage through the reed, and one end of the moving coil, which is close to the proportion adjusting cavity, is abutted on the leather film seat at the center of the adjusting leather film;
the movable coil comprises a movable coil shell, wherein the movable coil shell is provided with a magnetic conduction part, a magnetic conduction part is arranged on the movable coil shell, a magnetic conduction part is arranged on the magnetic conduction part, a magnetic field is formed in the magnetic field, and an adjusting screw is arranged in the magnetic field.
Further, in order to better implement the present invention, the reed includes an outer ring fixing portion connected and fixed to the moving coil housing, an inner ring fixing portion connected and fixed to the moving coil, and a plurality of elastic movable portions connected between the outer ring fixing portion and the inner ring fixing portion, wherein the outer ring fixing portion and the inner ring fixing portion are both in a closed ring shape, and the elastic movable portions are connected to the outer periphery of the inner ring fixing portion and the inner periphery of the outer ring fixing portion respectively in a parabolic shape.
Further, in order to better realize the invention, the coil is provided with a central positioning boss, a plurality of fixing buckles and positive and negative electrode wire outlet guide posts, wherein the inner ring fixing part of the reed and the coil PCB are both in positioning connection with the central positioning boss, the coil PCB, the inner ring fixing part and the coil are fixed together through the fixing buckles, and the positive and negative electrode wires of the moving coil are respectively wound on the positive and negative electrode wire outlet guide posts.
Further, in order to better realize the invention, the moving coil regulator further comprises an input PCB board arranged on the magnetic conduction board, wherein a first positive electrode pad, a second positive electrode pad and a wiring terminal for connecting a power supply are arranged on the input PCB board, and the first positive electrode pad and the second positive electrode pad are electrically connected with the wiring terminal;
the coil PCB is provided with a second positive and negative electrode bonding pad, positive and negative electrode wires of the movable coil are correspondingly welded on the second positive and negative electrode bonding pad, and the first positive and negative electrode bonding pad and the second positive and negative electrode bonding pad are correspondingly connected together through welding wires.
Further, in order to better realize the invention, the first control valve comprises a magnetic yoke, an electromagnetic coil, a fixed magnetic core, a main movable valve core and a main movable valve rod, wherein the magnetic yoke is installed on the valve body, the electromagnetic coil is arranged in the magnetic yoke, the fixed magnetic core is fixed on one side of the magnetic yoke far away from the valve body, the fixed magnetic core is inserted into a central hole of the electromagnetic coil, the main movable valve core is arranged in the central hole of the electromagnetic coil and can slide relative to the fixed magnetic core, the main movable valve rod is arranged on one end of the main movable valve core far away from the fixed magnetic core, and a main sealing rubber plug is arranged on one end of the main movable valve rod far away from the main movable valve core and used for opening or closing the first fuel gas main flow passage.
Further, in order to better realize the invention, the pilot control valve comprises a pilot movable valve core and a pilot valve rod, wherein the pilot movable valve core is arranged in the main movable valve rod and can slide relative to the main movable valve core, the pilot valve rod is arranged in the main movable valve rod and is connected with one end of the pilot movable valve core, which is far away from the main movable valve core, and a pilot valve rubber plug is arranged at one end of the pilot valve rod, which is far away from the pilot movable valve core, for opening or closing the pilot runner.
Further, in order to better realize the invention, a first main spring is arranged between the main sealing rubber plug and the magnetic yoke, and a pilot spring is arranged between the main sealing rubber plug and the pilot valve rubber plug.
Further, in order to better realize the invention, a moving gap is formed between the pilot movable valve core and the main movable valve core, a groove is arranged at one end of the pilot movable valve core, which is close to the main movable valve core, the end of the pilot valve rod, which is close to the main movable valve core, is arranged in the groove, and a buffer gap is formed between one end of the pilot valve rod, which is close to the main movable valve core, and the opening of the groove.
Further, in order to better realize the invention, the second control valve comprises a rubber coating, a valve seat, a spherical main valve plug and a main valve rod, wherein the rubber coating is arranged on the valve body, a back pressure control cavity is formed between the rubber coating and the valve body, the back pressure control cavity is communicated with the pilot runner, the valve seat is arranged on the valve body, a second fuel gas main runner is formed in the valve seat, the spherical main valve plug is arranged on the valve seat and used for opening or closing the second fuel gas main runner, the main valve rod is arranged on the valve seat and can slide relative to the valve seat, one end of the main valve rod is connected with the spherical main valve plug, the other end of the main valve rod is propped against the rubber coating, and a second main spring is arranged between the valve seat and the main valve rod.
Compared with the prior art, the invention at least comprises the following beneficial effects:
(1) The invention adopts the movable coil adjuster, and the movable coil group is suspended so that the movable coil group cannot contact other components to generate friction, and the pressure return difference is small, the proportion linearity is good, thereby improving the sensitivity and the accuracy of the pressure adjusting device and achieving the purpose of accurate flow adjustment.
(2) The electromagnetic coil of the first control valve can drive the first control valve and the pilot control valve to act, the structure is simple and reliable, the product cost is low, and the market competitiveness of the product can be improved to a certain extent.
Drawings
FIG. 1 is a schematic diagram of a fuel gas solenoid valve according to the present invention;
FIG. 2 is a schematic diagram of the first control valve and pilot control valve of the present invention;
FIG. 3 is a schematic view of a pressure regulating device according to the present invention;
fig. 4 is a perspective view of a moving coil regulator according to the present invention
FIG. 5 is a perspective view of a moving coil assembly according to the present invention
Figure 6 is a schematic perspective view of the reed of the present invention;
FIG. 7 is a schematic diagram of a moving coil in a three-dimensional structure according to the present invention;
fig. 8 is a schematic diagram of a three-dimensional structure of a connection between a moving coil assembly and an input PCB board according to the present invention;
fig. 9 is a perspective view of a cross-section of a conductive core plate according to the present invention;
Detailed Description
The following examples illustrate the invention, but the invention is not limited to these examples. Modifications and equivalents of some of the technical features of the specific embodiments of the present invention may be made without departing from the spirit of the present invention, and they are all included in the scope of the claimed invention.
Embodiment one: as shown in fig. 1 to 9, the present embodiment provides a pilot-type moving coil fuel gas proportional valve, comprising a valve body 1, the valve body 1 having a fuel gas inlet 101 and a fuel gas outlet 102, a fuel gas flow path for fuel gas flow being formed between the fuel gas inlet 101 and the fuel gas outlet 102, the fuel gas flow path comprising a first fuel gas main flow path 11, a pilot flow path 12 and a second fuel gas main flow path 13, a shut-off valve assembly for controlling opening and closing of the fuel gas flow path and a pressure regulating device 2 communicating with the pilot flow path 12 for regulating the flow rate 13 of the second fuel gas main flow path being provided in the valve body 1, the shut-off valve assembly being controlled by one electromagnetic coil, comprising a first control valve 3 for controlling opening and closing of the first fuel gas main flow path 11, a pilot control valve 4 provided below the first control valve 3 and connected to the first control valve 3 for controlling opening and closing of the pilot flow path 12, and a second control valve 5 provided downstream of the first control valve 3 for controlling opening and closing of the second fuel gas main flow path 13;
the pressure adjusting device 2 comprises an adjusting diaphragm 21 and a moving coil adjuster, wherein the adjusting diaphragm 21 is fixed on the valve body 1 through an adjusting diaphragm pressing plate 212, a proportion adjusting cavity 210 is formed between the adjusting diaphragm 21 and the valve body 1, a communication pipeline 211 is arranged between the proportion adjusting cavity 210 and the pilot runner 12 and used for communicating the proportion adjusting cavity and the pilot runner 12, the moving coil adjuster comprises a moving coil shell 22, a magnetic conducting iron core plate 23, a permanent magnet 24, a magnetic conducting plate 25 and a moving coil group 26, the moving coil shell 22 is fixed on the valve body 1, the magnetic conducting iron core plate 23, the permanent magnet 24 and the magnetic conducting plate 25 are sequentially arranged in the moving coil shell 22 to form a magnetic loop, a columnar magnetic conducting part 231 is formed at the center of the magnetic conducting iron core plate 23, an annular magnetic channel 230 is formed between the magnetic conducting part 231 and the magnetic conducting plate 25, the moving coil shell 22 is arranged in the opening 220 and the magnetic channel 230 at one end close to the proportion adjusting cavity 210, a reed 27 is connected between the moving coil group 26 and the opening 220, and the moving coil group 26 is suspended in the magnetic channel 230 through the reed 27. Further, a diaphragm seat 28 is arranged at the center of the adjusting diaphragm 21, the moving coil group 26 comprises a moving coil 261 and a coil PCB 262, wherein the moving coil 261 and the coil PCB 262 are fixed on the reed 27, the moving coil 261 is suspended in the magnetic passage 230 through the reed 27, and one end of the moving coil 230 close to the proportional adjusting cavity 210 is abutted on the diaphragm seat 28 at the center of the adjusting diaphragm 21; a receiving hole 232 extending into the magnetic conductive portion 231 is provided at the center of the moving coil housing 22, an adjusting screw 233 is provided in the receiving hole 232, and an adjusting spring 234 is provided between the adjusting screw 233 and the moving coil 261, whereby the elastic force of the adjusting spring 234 driving the moving coil 261 can be adjusted by the adjusting screw 233.
The fuel gas proportional valve of the embodiment adopts the movable coil adjuster, and the movable coil group 26 is suspended, so that friction is not generated when the movable coil group 26 contacts with other components, the pressure return difference is small, the proportion linearity is good, the sensitivity and the accuracy of the pressure adjusting device are improved, and the purpose of accurate flow adjustment is achieved.
Specifically, after the pilot flow channel 12 is opened, the pressure flows into the proportion adjusting cavity 210 through the connecting pipeline 211, the adjusting spring 234 is compressed by the adjusting screw 233 to push the moving coil 261 to compress the diaphragm seat 28, the position of the adjusting diaphragm 21 is accurately controlled, the pressure flowing into the proportion adjusting cavity 210 is increased, the pressure flowing into the back pressure control cavity 510 is reduced, and the accurate small fire flow preset is realized; when the moving coil regulator is electrified, the current is changed, the position of the compressing and regulating leather film 21 of the moving coil 261 is changed, and the pressure flowing into the proportion regulating cavity 210 is changed to increase or decrease the pressure of the back pressure control cavity 510, so that accurate flow regulation is realized.
In this embodiment, the conductive core plate 23 adopts an integrally formed structure, which is beneficial to reducing the cost and improving the performance of the conductive core plate 23.
In this embodiment, the reed 27 includes an outer ring fixing portion 271 connected to the moving coil housing 22, an inner ring fixing portion 272 connected to the moving coil 261, and a plurality of elastic moving portions 273 connected between the outer ring fixing portion 271 and the inner ring fixing portion 272, wherein the outer ring fixing portion 271 and the inner ring fixing portion 272 are all in a closed ring shape, the elastic moving portions 273 are in a parabolic shape, the elastic moving portions 273 elastically deform during the moving of the moving coil 261, and two ends of the elastic moving portions 273 are respectively connected to the inner periphery of the closed ring outer ring fixing portion 271 and the outer periphery of the closed ring inner ring fixing portion 272. The defect that the normal operation is affected by interference and friction between the conventional moving coil 261 and other components due to offset is overcome.
Preferably, a central positioning boss 263, a plurality of fixing buckles 264 and positive and negative pole wire outlet guide posts 265 are arranged on the moving coil 261, wherein the inner ring fixing portion 272 of the reed 27 and the coil PCB 262 are both in positioning connection with the central positioning boss 263, the coil PCB 262, the inner ring fixing portion 272 and the moving coil 261 are fixed together through the fixing buckles 264, and positive and negative wires of the moving coil 261 are respectively wound on the positive and negative pole wire outlet guide posts 265.
More preferably, the moving coil regulator 2 further includes an input PCB 29 disposed on the magnetic conductive plate 25, a flat pad 212 is disposed between the input PCB 29 and the magnetic conductive plate 25, the outer ring fixing portion 271 is fixed on the flat pad 212 by the input PCB 29, a first positive and negative electrode bonding pad 291 and a connection terminal 292 for connecting a power supply are disposed on the input PCB 29, and the first positive and negative electrode bonding pad 291 is electrically connected with the connection terminal 292;
the coil PCB 262 is provided with a second positive and negative electrode pad 266, positive and negative electrode wires of the coil 261 are correspondingly welded on the second positive and negative electrode pad 266, and the first positive and negative electrode pad 291 and the second positive and negative electrode pad 266 are correspondingly connected together through welding wires. The external power is input to the moving coil 261 through the connection terminal 292, the first positive and negative electrode pads 291 of the input PCB 29, and the second positive and negative electrode pads 266 of the coil PCB 262, and the structure thereof is simple, and the convenience and reliability of the electrical connection can be improved.
In this embodiment, the first control valve 3 includes a yoke 31, an electromagnetic coil 32, a fixed magnetic core 33, a main movable valve core 34, and a main movable valve stem 35, wherein the yoke 31 is mounted on the valve body 1, the electromagnetic coil 32 is disposed in the yoke 31, the fixed magnetic core 33 is fixed on one side of the yoke 31 far away from the valve body 1, and the fixed magnetic core 33 is inserted into a central hole 320 of the electromagnetic coil 32, the main movable valve core 34 is disposed in the central hole 320 of the electromagnetic coil 32 and can slide relative to the fixed magnetic core 33, the main movable valve stem 35 is disposed on one end of the main movable valve core 34 far away from the fixed magnetic core 33, a sealing ring is disposed between the main movable valve stem 35 and the main movable valve core 34 to improve the tightness of connection between the main movable valve stem 35 and the main movable valve core 34, and a main sealing rubber plug 36 is disposed on one end of the main movable valve stem 35 far away from the main movable valve core 34 for opening or closing the first fuel gas main flow channel 11. After the power is on, the electromagnetic coil 32 excites the fixed magnetic core 33 to generate magnetic attraction, and attracts the main movable valve core 34 to slide and be attracted relative to the fixed magnetic core 33, so as to drive the main movable valve rod 35 to open the first fuel gas main flow channel 11, and after the attraction, the main movable valve core 34 has strong magnetic attraction.
Further, the pilot control valve 4 includes a pilot movable valve core 41 and a pilot valve stem 42, wherein the pilot movable valve core 41 is disposed in the main movable valve stem 35 and can slide relative to the main movable valve core 34, the pilot valve stem 42 is disposed in the main movable valve stem 35 and is connected to an end of the pilot movable valve core 41 away from the main movable valve core 34, and a pilot valve rubber plug 43 is disposed on an end of the pilot valve stem 42 away from the pilot movable valve core 41 for opening or closing the pilot runner 12. The pilot movable valve core 41 in the pilot control valve 4 is under the action of the magnetic attraction of the main movable valve core 34 after being attracted with the fixed magnetic core 33, and the pilot movable valve core 41 slides and is attracted relative to the main movable valve core 34 to drive the pilot valve rod 42 to open the pilot runner 12.
Further, a first main spring 37 is provided between the main closing rubber stopper 36 and the yoke 31, and a pilot spring 44 is provided between the main closing rubber stopper 36 and the pilot valve rubber stopper 43. When the power is off, the compressed first main spring 37 pushes the main sealing rubber plug 36 to reset, and the main movable valve rod 35 and the main movable valve core 34 are driven to reset in the process of resetting the main sealing rubber plug 36. Meanwhile, the compressed pilot spring 44 pushes the pilot valve rubber plug 43 to reset, and the pilot valve rubber plug 43 drives the pilot valve rod 42 and the pilot movable valve core 41 to reset in the resetting process.
Preferably, a moving gap 38 is formed between the pilot movable spool 41 and the main movable spool 34, a groove 410 is provided on an end of the pilot movable spool 41 close to the main movable spool 34, an end of the pilot valve rod 42 close to the main movable spool 34 is provided in the groove 410, and a buffer gap 411 is formed between an end of the pilot valve rod 42 close to the main movable spool 34 and an opening of the groove 410.
In this embodiment, the second control valve 5 includes a rubber film 51, a valve seat 52, a spherical main valve plug 53 and a main valve stem 54, wherein the rubber film 51 is disposed on the valve body 1, a back pressure control chamber 510 is formed between the rubber film 51 and the valve body 1, the back pressure control chamber 510 is communicated with the pilot flow passage 12, the valve seat 52 is disposed on the valve body 1 and a sealing ring is disposed between the valve seat 52 and the valve body 1 to improve the tightness of the connection between the valve seat 52 and the valve body 1, a second gas main flow passage 13 is formed in the valve seat 52, the spherical main valve plug 53 is disposed on the valve seat 52 to open or close the second gas main flow passage 13, the main valve stem 54 is disposed on the valve seat 52 and slidable relative to the valve seat 52, one end of the main valve stem 54 is connected with the spherical main valve plug 53, the other end is abutted against the rubber film 51, and a second main spring 55 is disposed between the valve seat 52 and the main valve stem 54.
When the gas main flow channel valve is used, after the electromagnetic coil 32 is electrified, the first control valve 3 is excited by the fixed magnetic core 33 to generate magnetic attraction and attract the main movable valve core 34, the main movable valve core 34 drives the main movable valve rod 35 to open the first gas main flow channel 11, and the main movable valve core 34 generates strong magnetic attraction after being attracted;
the pilot movable valve core 41 in the pilot control valve 4 is under the action of the magnetic attraction of the main movable valve core 34 after being attracted with the fixed magnetic core 33, and the pilot movable valve core 41 slides and is attracted relative to the main movable valve core 34 to drive the pilot valve rod 42 to open the pilot runner 12;
after the pilot flow channel 12 is opened, pressure flows into the back pressure control cavity 510, the rubber membrane 51 is pushed to move to the other side, the main valve rod 54 is pushed by the rubber membrane 51 to generate displacement, and in the displacement process of the main valve rod 54, the second fuel gas main flow channel 13 which is sealed by the spherical main valve rubber plug 53 is opened.
After the pilot flow channel 12 is opened, the pressure flows into the proportion adjusting cavity 210 through the connecting pipeline 211, the movable coil 261 is pushed by the adjusting spring 234 to compress the diaphragm seat 28 through the adjusting screw 233, the position of the adjusting diaphragm 21 is accurately controlled, the pressure flowing into the proportion adjusting cavity 210 is increased, the pressure flowing into the back pressure control cavity 510 is reduced, and the accurate small fire flow preset is realized; when the moving coil regulator is electrified, the current is changed, the position of the compressing and regulating leather film 21 of the moving coil 261 is changed, and the pressure flowing into the proportion regulating cavity 210 is changed to increase or decrease the pressure of the back pressure control cavity 510, so that accurate flow regulation is realized.
The first control valve 3 and the pilot control valve 4 are driven by the same electromagnetic coil 32 in an excitation way, and the main movable valve core 34 is attracted with the fixed magnetic core 33 after the electromagnetic coil 32 is electrified to drive the main sealing rubber plug 36 on the main movable valve rod 35 to open the first fuel gas main flow passage 11; the main movable valve core 34 generates strong magnetic attraction after being attracted, and the pilot movable valve core 41 is attracted to drive the pilot valve rubber plug 43 on the pilot valve rod 42 to open the pilot flow passage 12; when the electromagnetic coil 32 is powered off, excitation of the electromagnetic coil 32 disappears, and the main movable valve core 34 is separated from the fixed magnetic core 33 under the action of the first main spring force 37, so that the main sealing rubber plug 36 is pushed to cut off the gas supply of the first gas main flow channel 11; meanwhile, the pilot movable valve core 41 is separated from the main movable valve core 34 under the action of the pilot spring 44, so that the pilot valve rubber plug 43 is pushed to cut off the pilot flow channel 12; after the pilot flow passage 12 is closed, no gas pressure enters the back pressure control cavity 510, and the second control valve 5 pushes the main valve rod 54 to drive the spherical main valve rubber plug 53 to seal the second gas main flow passage 13 under the action of the second main spring 55, so that the requirement of safety performance is met.
What has been described above is merely some embodiments of the present invention. It will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the spirit of the invention.
Claims (10)
1. The utility model provides a guide's moving coil gas proportional valve, includes valve body (1), valve body (1) have gas entry (101) and gas export (102) gas entry (101) with form the gas flow path that is used for the gas flow between gas export (102), the gas flow path includes first gas sprue (11), guide's runner (12) and second gas sprue (13) be provided with in valve body (1) be used for controlling gas flow path switching's trip valve assembly and be used for adjusting pressure regulating device (2) of second gas sprue (13) flow size, trip valve assembly is controlled by an electromagnetic coil, including be used for controlling first control valve (3) of first gas sprue (11) switching, be used for controlling guide's runner (12) switching's pilot control valve (4) and be used for controlling second gas sprue (13) switching's second control valve (5), its characterized in that:
the pressure regulating device (2) comprises a regulating film (21) and a moving coil regulator, wherein the regulating film (21) is fixed on the valve body (1), a proportion regulating cavity (210) is formed between the regulating film (21) and the valve body (1), the proportion regulating cavity (210) is communicated with the pilot runner (12), the moving coil regulator comprises a moving coil shell (22), a magnetic conducting iron core plate (23), a permanent magnet (24), a magnetic conducting plate (25) and a moving coil group (26), the moving coil shell (22) is fixed on the valve body (1), the magnetic conducting iron core plate (23), the permanent magnet (24) and the magnetic conducting plate (25) are sequentially arranged in the moving coil shell (22) to form a magnetic loop, a magnetic conducting part (231) is formed at the center of the magnetic conducting iron core plate (23), an annular magnetic passage (230) is formed between the magnetic conducting part (231) and the magnetic conducting plate (25), the moving coil shell (22) is close to one end of the proportion regulating cavity (210) to form an opening (220), the moving coil (220) is arranged in the moving coil group (26) and the opening (230), suspending the moving coil group (26) in the magnetic path (230) through the reed (27);
the first control valve (3) comprises a magnetic yoke (31), an electromagnetic coil (32), a fixed magnetic core (33), a main movable valve core (34) and a main movable valve rod (35), wherein the magnetic yoke (31) is installed on the valve body (1), the electromagnetic coil (32) is arranged in the magnetic yoke (31), the fixed magnetic core (33) is fixed on one side, far away from the valve body (1), of the magnetic yoke (31), the fixed magnetic core (33) is inserted into a central hole (320) of the electromagnetic coil (32), the main movable valve core (34) is arranged in the central hole (320) of the electromagnetic coil (32) and can slide relative to the fixed magnetic core (33), and the main movable valve rod (35) is arranged on one end, far away from the fixed magnetic core (33), of the main movable valve core (34).
The pilot control valve (4) and the first control valve (3) are excited and driven by the same electromagnetic coil (32).
2. The pilot-operated moving coil fuel gas proportional valve according to claim 1, characterized in that a diaphragm seat (28) is arranged in the center of the adjusting diaphragm (21), the moving coil group (26) comprises a moving coil (261) and a coil PCB (262), wherein the moving coil (261) and the coil PCB (262) are fixed on the reed (27), the moving coil (261) is suspended in the magnetic passage (230) through the reed (27), and one end of the moving coil (261) close to the proportional adjusting cavity (210) is abutted on the diaphragm seat (28) in the center of the adjusting diaphragm (21);
an accommodating hole (232) extending into the magnetic conduction part (231) is formed in the center of the moving coil housing (22), an adjusting screw (233) is arranged in the accommodating hole (232), and an adjusting spring (234) is arranged between the adjusting screw (233) and the moving coil (261).
3. The pilot-operated moving coil fuel gas proportional valve as claimed in claim 2, wherein the reed (27) comprises an outer ring fixing portion (271), an inner ring fixing portion (272) connected to the moving coil (261), and a plurality of elastic movable portions (273) connected between the outer ring fixing portion (271) and the inner ring fixing portion (272), the outer ring fixing portion (271) and the inner ring fixing portion (272) are each in a closed ring shape, and the elastic movable portions (273) are connected to the outer periphery of the inner ring fixing portion (272) and the inner periphery of the outer ring fixing portion in a parabolic shape.
4. A pilot-operated coil fuel gas proportional valve as claimed in claim 3, wherein a central positioning boss (263), a plurality of fixing buckles (264) and positive and negative electrode wire outlet guide posts (265) are arranged on the moving coil (261), wherein an inner ring fixing portion (272) of the reed (27) and the coil PCB (262) are both in positioning connection with the central positioning boss (263), and the coil PCB (262) and the inner ring fixing portion (272) are fixed with the moving coil (261) through the fixing buckles (264), and positive and negative electrode wires of the moving coil (261) are respectively wound on the positive and negative electrode wire outlet guide posts (265).
5. The pilot-operated moving-coil gas proportional valve as claimed in claim 2, wherein the moving-coil regulator further comprises an input PCB (29) provided on the magnetic conductive plate (25), a first positive and negative electrode pad (291) and a connection terminal (292) for connecting a power supply are provided on the input PCB (29), and the first positive and negative electrode pad (291) is electrically connected with the connection terminal (292);
be provided with second positive negative electrode pad (266) on coil PCB board (262), the positive negative electrode line of moving coil (261) correspond to weld on second positive negative electrode pad (266), first positive negative electrode pad (291) with link together through welding wire correspondence between second positive negative electrode pad (266).
6. A pilot-operated moving-coil fuel gas proportional valve as claimed in claim 1, wherein a main closing rubber plug (36) is provided on an end of the main movable valve stem (35) remote from the main movable valve core (34) for opening or closing the first fuel gas main flow passage (11).
7. The pilot coil fuel gas proportional valve according to claim 6, wherein the pilot control valve (4) comprises a pilot movable valve core (41) and a pilot valve rod (42), wherein the pilot movable valve core (41) is arranged in the main movable valve rod (35) and can slide relative to the main movable valve core (34), the pilot valve rod (42) is arranged in the main movable valve rod (35) and is connected with one end, away from the main movable valve core (34), of the pilot movable valve core (41), and a pilot valve rubber plug (43) is arranged on one end, away from the pilot movable valve core (41), of the pilot valve rod (42) for opening or closing the pilot runner (12).
8. A pilot-operated moving-coil gas proportional valve as claimed in claim 7, characterized in that a first main spring (37) is provided between the main closing rubber plug (36) and the yoke (31), and a pilot spring (44) is provided between the main closing rubber plug (36) and the pilot valve rubber plug (43).
9. The pilot-driven coil gas proportional valve as claimed in claim 7, wherein a moving gap (38) is formed between the pilot-driven movable spool (41) and the main-driven movable spool (34), a groove (410) is provided at an end of the pilot-driven movable spool (41) close to the main-driven movable spool (34), an end of the pilot valve stem (42) close to the main-driven movable spool (34) is provided inside the groove (410), and a buffer gap (411) is formed between an end of the pilot valve stem (42) close to the main-driven movable spool (34) and an opening of the groove (410).
10. A pilot-operated coil fuel gas proportional valve as claimed in any one of claims 1 to 9, wherein the second control valve (5) comprises a rubber diaphragm (51), a valve seat (52), a spherical main valve plug (53) and a main valve stem (54), wherein the rubber diaphragm (51) is arranged on the valve body (1), a back pressure control chamber (510) is formed between the rubber diaphragm (51) and the valve body (1), the back pressure control chamber (510) is communicated with the pilot flow passage (12), the valve seat (52) is arranged on the valve body (1), the second fuel gas main flow passage (13) is formed in the valve seat (52), the spherical main valve plug (53) is arranged on the valve seat (52) for opening or closing the second fuel gas main flow passage (13), the main valve stem (54) is arranged on the valve seat (52) and can slide relative to the valve seat (52), one end of the main valve stem (54) is connected with the spherical main valve stem (53) against the rubber, and the other end of the main valve stem (54) is arranged between the main valve plug (52) and the main valve stem (55).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910708775.7A CN110486527B (en) | 2019-08-01 | 2019-08-01 | Pilot-operated type moving coil fuel gas proportional valve |
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| CN201910708775.7A CN110486527B (en) | 2019-08-01 | 2019-08-01 | Pilot-operated type moving coil fuel gas proportional valve |
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| CN110486527B true CN110486527B (en) | 2024-03-12 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110887066B (en) * | 2019-12-03 | 2021-07-06 | 杭州厨神智能设备有限公司 | Energy-saving environment-friendly cooking bench |
| CN113108110B (en) * | 2021-03-17 | 2023-01-03 | 绍兴艾柯电气有限公司 | Pilot drive structure and fuel gas proportional valve |
| CN113374876B (en) * | 2021-06-30 | 2023-03-21 | 四川航天烽火伺服控制技术有限公司 | High-temperature high-pressure gas electromagnetic valve |
| CN217927406U (en) * | 2022-07-01 | 2022-11-29 | 鹤山市沐加智能卫浴科技有限公司 | Bistable electromagnetic water switch |
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