CN111379890A - Electromagnetic driving device and gas proportional valve with same - Google Patents
Electromagnetic driving device and gas proportional valve with same Download PDFInfo
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- CN111379890A CN111379890A CN201811645953.8A CN201811645953A CN111379890A CN 111379890 A CN111379890 A CN 111379890A CN 201811645953 A CN201811645953 A CN 201811645953A CN 111379890 A CN111379890 A CN 111379890A
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- 230000005540 biological transmission Effects 0.000 claims abstract description 42
- 239000002737 fuel gas Substances 0.000 claims abstract description 13
- 230000002093 peripheral effect Effects 0.000 claims abstract 3
- 238000006073 displacement reaction Methods 0.000 claims description 9
- 230000001360 synchronised effect Effects 0.000 claims description 4
- 230000013011 mating Effects 0.000 claims description 3
- 238000013459 approach Methods 0.000 claims description 2
- 238000005096 rolling process Methods 0.000 claims description 2
- 238000005452 bending Methods 0.000 claims 1
- 239000007789 gas Substances 0.000 abstract description 32
- 230000006835 compression Effects 0.000 description 7
- 238000007906 compression Methods 0.000 description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 5
- 238000003754 machining Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000033001 locomotion Effects 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 230000003044 adaptive effect Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
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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
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/04—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor
- F16K31/046—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor with electric means, e.g. electric switches, to control the motor or to control a clutch between the valve and the 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
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/20—Excess-flow valves
- F16K17/22—Excess-flow valves actuated by the difference of pressure between two places in the flow line
- F16K17/32—Excess-flow valves actuated by the difference of pressure between two places in the flow line acting on a servo-mechanism or on a catch-releasing mechanism
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Electrically Driven Valve-Operating Means (AREA)
Abstract
The invention discloses an electromagnetic driving device and a fuel gas proportional valve with the same, wherein the electromagnetic driving device comprises a valve cover, a housing, a valve rod, a rotor, a transmission nut and a stepping motor; the valve cover is fixedly connected with the housing, and the stepping motor is fixedly arranged on the peripheral part of the housing; the housing is provided with a first cavity, the rotor and a transmission nut are accommodated in the first cavity, the transmission nut and the rotor synchronously rotate, and the valve rod is matched with the transmission nut through threads; the valve cover is provided with a valve cover hole, at least part of the valve rod is inserted into the valve cover hole, and a circumferential limiting pair capable of axially and relatively displacing is formed between the valve rod and the valve cover. The invention can effectively improve and maintain the control precision of the electromagnetic driving device by optimizing the structure of the electromagnetic driving device, and realizes the precise control of the gas pressure at the outlet of the gas proportional valve.
Description
Technical Field
The invention relates to the technical field of electromagnetic drive control and gas control, in particular to an electromagnetic drive device and a gas proportional valve with the same.
Background
The electromagnetic driving device can be applied to a gas proportional valve, a movable iron core can be arranged in the electromagnetic driving device, when a coil is electrified, the movable iron core generates certain magnetic force to move downwards under the action of a magnetic field, the moving distance of the movable iron core often influences the outlet pressure of the gas proportional valve, the electromagnetic driving device controls the actuating precision of the valve plug to be greatly influenced by the magnetic force of the movable iron core inside the electromagnetic driving device, and after the magnetic performance of the movable iron core is weakened, the actuating precision is easy to change, and further the outlet pressure of the gas proportional valve is influenced.
In view of this, a technical problem to be solved by those skilled in the art is how to optimally design the structure of the electromagnetic driving device to maintain good actuation precision and reduce the influence on the outlet gas pressure of the gas proportional valve.
Disclosure of Invention
In order to solve the technical problems, the invention provides an electromagnetic driving device and a fuel gas proportional valve with the electromagnetic driving device, which can relatively keep better adjusting precision through optimizing the structure of the electromagnetic driving device, and reduce the influence on the fuel gas pressure at the outlet of the fuel gas proportional valve.
The invention provides an electromagnetic driving device which comprises a valve cover, a housing, a valve rod, a rotor, a transmission nut and a coil component, wherein the valve cover is fixedly connected with the housing, the coil component is fixedly arranged on the outer periphery of the housing, the electromagnetic driving device is provided with a first cavity, the rotor and the transmission nut are contained in the first cavity, the rotor is positioned on the outer periphery of the transmission nut, the transmission nut is fixedly connected or limited and connected with the rotor, the valve rod is in threaded fit with the transmission nut, the valve cover is provided with a valve cover hole, at least part of the valve rod is positioned in a third cavity, a circumferential limiting pair is formed by the valve rod and the valve cover in a matched mode, the valve rod can axially displace along the valve cover hole, and the valve rod is limited to rotate towards the circumferential direction.
The invention also provides a fuel gas proportional valve which is provided with a valve cavity and a diaphragm assembly, wherein the valve cavity comprises a valve seat, a first electromagnetic driving device, a servo driving device and an electromagnetic driving device, the valve seat is provided with an inlet and an outlet, fuel gas flows in from the inlet and flows out from the outlet, the valve cavity is also provided with a pressure difference adjusting device, the valve seat is provided with a first valve port, a second valve port and a third valve port, the first valve port corresponds to the first electromagnetic driving device, the second valve port corresponds to the servo driving device, the third valve port corresponds to the electromagnetic driving device, the electromagnetic driving device further comprises a valve plug and a diaphragm, and the diaphragm assembly comprises a valve plug and a diaphragm piece, and the electromagnetic driving device can drive the valve plug to axially and downwards approach the third valve port.
The electromagnetic driving device comprises an electromagnetic driving device body, a valve rod, a valve cover and a stepping motor, wherein the electromagnetic driving device body is provided with a valve rod, the valve rod is connected with the valve cover through a valve rod connecting rod, the valve rod is connected with the valve rod through a valve rod.
Drawings
FIG. 1 is a schematic diagram of an overall structure of an electromagnetic driving apparatus according to an embodiment;
FIG. 2 is a perspective view of the valve cover shown in FIG. 1;
FIG. 3 is a perspective view of the valve stem shown in FIG. 1;
FIG. 4 is a perspective view of the drive nut shown in FIG. 1;
FIG. 5 is an axial cross-sectional view of the drive nut shown in FIG. 4;
FIG. 6 is a perspective view of the rotor shown in FIG. 1;
fig. 7 is a schematic view of the overall structure of the gas proportional valve according to the embodiment.
In fig. 1-7:
the electromagnetic driving device 10, the stepping motor 1, the valve cover 2, the hexagonal inner hole 21, the third cavity 22, the mounting groove 23, the machining mounting surface 24, the bearing 25, the sealing member 26, the valve rod 3, the hexagonal cylinder 31, the housing 4, the flange 41, the rotor 5, the internal teeth 51, the transmission nut 6, the second cavity 61, the lower end 62, the limiting step 63, the external teeth 64, the elastic member 7, the first spring support pad 71, the middle convex portion 711, the limiting mounting groove 712, the enclosing portion 713, the slit 714, the second spring support pad 72, the middle convex portion 721, the limiting mounting groove 722, the enclosing portion 723 and the slit 724;
the main proportional valve 20, the diaphragm assembly 8, the inlet 101', the solenoid valve port 102', the servo solenoid valve 103 ', the passage 104', the chamber 105 ', the passage 106', the diaphragm back chamber 107', the main valve port 108', the outlet 109', the passage 1010', the diaphragm 1011 ', and the inlet solenoid valve 1012'.
Detailed Description
In order to make the technical solutions of the present invention better understood by those skilled in the art, the present invention will be further described in detail with reference to the accompanying drawings and specific embodiments.
Please refer to fig. 1, which is a schematic diagram of an overall structure of an electromagnetic driving apparatus according to the present embodiment.
The electromagnetic driving device 10 is adapted to a main valve body of a gas proportional valve to adjust the outlet gas pressure of the gas proportional valve. As shown in the figure, the electromagnetic driving device 10 mainly comprises a stepping motor 1 and a valve body consisting of a valve cover 2, a valve rod 3, a housing 4, a rotor 5 and a transmission nut 6; wherein, the valve cover 2 can be connected with the main proportional valve 20 body of the fuel gas proportional valve to establish the reliable connection relationship between the electromagnetic driving device 10 and the main proportional valve 20. Referring also to fig. 7, a schematic diagram of the overall structure of the gas proportional valve is shown.
The stepping motor 1 is fixedly arranged on the periphery of the housing 4, and the electromagnetic driving device is provided with a first cavity. The open end of the valve cover 2 is fixedly arranged on the valve cover 2, and it should be noted that the first cavity is a first cavity formed by the casing 4 and the valve cover 2, and the first cavity contains components such as a rotor 5 and a transmission nut 6. As shown in fig. 1, a rotor 5 built in a housing 4 is adapted to a stepping motor, thereby outputting a rotational driving force according to a control instruction; the transmission nut 6 is fixedly connected or limited with the rotor 5, namely the transmission nut 6 and the rotor 5 can be subjected to injection molding or the transmission nut 6 and the rotor 5 can be subjected to gear engagement and other modes, so that the transmission nut 6 and the rotor 5 synchronously rotate, wherein a valve cover hole is formed in the valve cover 2, at least part of the valve rod 3 capable of axially displacing is inserted into the valve cover hole, and at least part of the valve rod is positioned in a third valve cavity 22 and is used for being matched with a diaphragm assembly 8 of the gas proportional valve, and the upper end of the valve rod 3 is in threaded fit with the transmission nut 6 and forms a circumferential limiting pair capable of axially and relatively displacing with the valve cover 2.
The term "circumferential stopping pair capable of axially relative displacement" means that two members have a degree of freedom of circumferential stopping without circumferential displacement therebetween, and that two members have a degree of freedom of axial relative displacement therebetween. In this scheme, when drive nut 6 rotated along with rotor 5, the setting of "but the spacing vice of circumference of axial relative displacement" can make with drive nut 6 screw-thread fit's valve rod 3 axial displacement, also be with component rotary motion conversion component linear motion.
It should be noted that the limitation of the rotation of the valve stem 3 in the circumferential direction by the circumferential stopper pair means that the valve stem 3 can rotate within a certain gap due to an influence factor such as a machining tolerance of a component, but cannot rotate at least in the circumferential direction.
It should be understood that the circumferential limiting pair capable of axially and relatively displacing can be realized by adopting different structural forms, and theoretically, as long as a non-concentric revolving body is arranged between the valve rod 3 and the valve cover 2 at the matching position, the purpose of linearly displacing the valve rod 3 relative to the valve cover 2 under the action of the transmission nut 6 can be achieved. In the scheme, the first limiting part and the second limiting part of the circumferential limiting pair can axially and relatively displace, the first limiting part protrudes upwards from the body of the valve cover 2, and the first limiting part is provided with a first limiting hole 21; the valve rod 3 is provided with a second limiting part matched with the first limiting hole 21; correspondingly, the second limiting part is provided with a second limiting surface 31, the second limiting surface 31 is a multi-surface or special-shaped structure with more than two surfaces, and the structure of the first limiting hole is matched with the second limiting surface so as to limit in the circumferential direction and realize relative axial displacement. Referring to fig. 2 and 3 together, fig. 2 is a schematic structural view of the valve cap shown in fig. 1, and fig. 3 is a schematic structural view of the valve stem shown in fig. 1.
The adaptive cross section shown in the figure is formed by the hexagonal inner hole 21 of the valve cover 2 and the hexagonal column 31 of the valve rod 3, and preferably, the hexagonal adaptive cross section has the characteristics of better processing manufacturability and relatively better bearing strength.
In order to obtain smaller overall dimension of the product, the overall assembly compactness can be further improved through structural design of the components. As shown in the figure, the body of the drive nut 6 extends downwards to form a second cavity 61, and the part of the valve cover 2 forming the circumferential limiting pair is placed in the second cavity 61; the body of the valve cover 2 has a third cavity 22, the part of the valve rod 3 inserted into the valve cover 2 is arranged in the third cavity 22, correspondingly, the valve rod 3 can be matched with the diaphragm component 8 of the gas proportional valve 20 through an elastic part 7, and here, the elastic part 7 can also be arranged in the third cavity 22, and the inner space of the stepping motor 1 is fully utilized.
Further, the electromagnetic driving device further comprises a bearing 25, the bearing 25 comprises an inner ring, an outer ring and a rolling element, the transmission nut 6 comprises a lower end part 62 and an extension part, the extension part protrudes from the lower end part 62 in the radial direction, the extension part is fixedly connected with the lower end part of the rotor 5 or is abutted against the lower end part of the rotor 5 to support the rotor 5, the lower end part 62 of the transmission nut 6 is fixedly connected with the inner ring of the bearing 25, a certain gap is formed between the lower end part 62 and the valve cover end surface of the valve cover 2 to prevent the lower end part 62 from being in direct contact with the valve cover end surface, the outer ring is fixedly connected with the valve cover 2 and/or the housing 4 and does not interfere with the outer ring and the housing 4, the transmission nut 6, the inner ring and the rotor 5 synchronously rotate together during actuation, and the transmission nut 6, the inner ring and the rotor can rotate together, through the cooperation of above drive nut 6 and bearing 25, can reduce the frictional contact of drive nut 6 and valve gap terminal surface, can promote drive nut 6 and rotor 5 and carry out synchronous pivoted smooth and easy degree, and the valve rod passes through threaded connection with drive nut 6 again, and the reliability that the valve rod moved obtains further assurance to can promote the precision that the control valve plug moved relatively, promote electromagnetic drive device's whole and actuate the precision.
Referring to fig. 4 and 5 together, fig. 4 is a perspective view of the drive nut shown in fig. 1; fig. 5 is an axial cross-sectional view of the drive nut shown in fig. 4. The body of the drive nut 6 above the lower end 62 projects radially to form a stop step 63 to provide axial stop for the rotor 5. As shown in fig. 1, the lower end surface of the rotor 5 contacts the upper surface of the limit step 63 to limit the axial direction.
In the scheme, the housing 4 is used as a main associated component for assembling the stepping motor 1 and the valve body, and the assembling precision and the reliability of the housing directly influence the adjusting precision of the valve component. As shown in fig. 1, the opening end of the housing 4 has a bent flange 41, and the surface of the bonnet 2 has a machining mounting surface 24 for fixing the flange 41, so that on one hand, the machining mounting surface 24 ensures the assembly precision of the housing 4 and the external stepping motor 1 relative to the internal valve body components such as the bonnet 2, and meanwhile, the arrangement of the flange 41 increases the assembly contact surface of the housing 4 and the bonnet 2, thereby further improving the assembly reliability between the two.
And matching teeth are arranged between the outer surface of the transmission nut 6 and the inner wall of the rotor 5 so as to facilitate the synchronous rotation of the two. As shown in fig. 4 and 5, the transmission nut 6 is provided with external teeth 64 uniformly distributed in the circumferential direction, the rotor 5 is provided with internal teeth 51, and the internal teeth are meshed to establish circumferential limit, so that synchronous rotation of the transmission nut 6 and the rotor 5 is realized. Please also refer to fig. 6, which is a perspective view of the rotor shown in fig. 1.
It is understood that the arrangement of the mating teeth may also adopt other structural forms, such as a key slot mating to establish a circumferential limit, and the above functions can be achieved as well; compared with the prior art, the form of the circumferentially uniformly distributed meshing teeth can better realize uniform loading, improve the running stability of products and effectively control running noise.
In addition, this scheme adopts spacing retaining ring and spacing step to provide the stroke spacing of valve rod linear displacement. As shown in the figure, the end of the valve stem 3 extending out of the transmission nut 6 is clamped with the limit retainer 32, and the part of the valve stem 3 located in the second cavity 61 is provided with the limit step 33 extending radially, so that during assembly, after the valve stem 3 passes out of the second cavity 61, the limit retainer 32 is clamped in the mounting groove of the extending end of the valve stem 3 and can be lower than the outer surface of the transmission nut 6. Therefore, the limit retainer ring 32 and the limit step 33 can respectively abut against the transmission nut 6 to form the stroke limit of the linear displacement of the valve rod 3; the limiting check ring 32 is used for limiting the position of the valve rod 3 moving downwards; the limit step 33 is used for limiting the upward movement of the valve rod 3.
In the actual work process, the tip of valve rod 3 passes through elastic component 7 and the 8 adaptations of diaphragm assembly of gas proportional valve, and in order to obtain better gas sealing performance, this scheme is further provided with sealing member 26 between the open end of housing 4 and valve gap 2, seals the valve body. With this arrangement, even if the diaphragm assembly 8 is damaged, it is ensured that the fuel gas does not leak abnormally from the electromagnetic driving device 10 side.
Furthermore, the elastic member 7 is a compression spring, two ends of the elastic member are respectively provided with a spring support pad (71, 72), and opposite ends of the two spring support pads (71, 72) are respectively provided with a middle convex part for sleeving the compression spring so as to limit the compression spring in the radial direction; the middle protrusion 711 of the first spring support pad 71 is inserted into the upper end of the compression spring, and the middle protrusion 721 of the second spring support pad 72 is inserted into the lower end of the compression spring. In addition, the other end of the first spring support pad 71 is provided with a limit mounting groove 712 adapted to the end of the valve rod 3, and the other end of the second spring support pad 72 is provided with a limit mounting groove 722 adapted to the connecting member of the diaphragm assembly 8. Preferably, the end of the valve rod 3 located in the position-limiting installation groove 712 of the first spring support pad 71 is configured as a convex spherical surface to contact with the center point of the groove bottom, so that the bias load influence on the diaphragm assembly 8 caused by uneven pressing between the spring support pad and the compression spring can be balanced; by the arrangement, the compression spring with the end surface not subjected to grinding treatment can be adopted, and the manufacturing cost of the product is reduced.
As shown in the figure, the limiting installation grooves of the two spring supporting pads are formed by enclosing parts (713, 723) extending inwards from the body, and slits (714, 724) extending radially from middle notches of the enclosing parts (713, 723) are formed.
The following is a brief description of the operation principle of the electromagnetic driving device 10 according to the present embodiment:
after the stepping motor 1 is electrified, electromagnetic force is generated to drive the rotor 5 to rotate, and the transmission nut 6 is driven by the rotor 5 to synchronously rotate. Meanwhile, the internal thread arranged on the inner ring of the transmission nut 6 is meshed with the external thread on the valve rod 3, and based on the arrangement of the circumferential limiting pair between the valve rod 3 and the valve cover 2, when the transmission nut 6 rotates, the valve rod 3 moves up and down under the driving force of the meshing of the threads. Thereby, the opening degree of the valve port of the proportional control valve is controlled.
In addition to the electromagnetic driving device, the present embodiment also provides a gas proportional valve. It comprises a main proportional valve 20 and an electromagnetic drive 10 adapted to the main proportional valve 20, and a diaphragm assembly 8 on the body of the main proportional valve 20 in the engaged position, as in the prior art.
In the initial working state of the valve body, gas enters the valve body from the inlet 101', the inlet electromagnetic valve 1012' is electrified and opened, the gas flows to the inner cavity of the valve body from the inlet 101' through the electromagnetic valve port 102', the servo electromagnetic valve 103 ' is electrified, and the gas flows to the cavity 105 ' through the channel 104' and then flows into the diaphragm back cavity 107' from the channel 106 '; after the gas enters the diaphragm back cavity 107', the diaphragm 1011' moves upward under the action of the gas pressure to push the main proportional valve core 5 'to move upward, the main valve port 108' is opened, and the gas flows out of the valve body from the valve body outlet 109 'through the main valve port 108' and finally flows into the combustion chamber.
When the outlet pressure is higher than the system requirement, the stepping motor 1 obtains a system instruction to drive the rotor 5 to rotate for a certain angle, the valve rod 3 moves upwards, the valve port of the proportional control valve is opened, the fuel gas in the diaphragm back cavity 107 'flows into the cavities of the valve body outlets 109' and 107 'through the channel 1010', the fuel gas is reduced, the pressure is reduced, the opening degree of the main valve port 108 'is reduced, and the pressure of the fuel gas proportional valve outlet 109' is reduced. Thereby, the total outflow gas amount is reduced, and the system combustion heat amount is reduced.
When the outlet pressure is lower than the system requirement, the stepping motor 1 obtains a system instruction to drive the rotor 5 to rotate for a certain angle, the valve rod 3 moves downwards, the opening of the valve port of the proportional control valve is reduced, the gas entering the diaphragm back cavity 107' has larger flow than the gas flowing out of the channel 1010', the gas in the cavity 107' is increased, the pressure is increased, the opening of the main valve port 108' is increased, and the pressure of the outlet 109' of the gas proportional valve is increased. Thereby, the amount of the total outflow gas increases, and the system combustion heat increases.
It should be noted that, in the above embodiment provided by the present embodiment, the functional structure of the main proportional valve 20 is not the core point of the present application, and those skilled in the art can implement the function based on the prior art, so that details are not described herein. In addition, the main proportional valve adapted to the electromagnetic driving device 10 is not limited to the structure form of the main proportional valve 20 shown in the figure, and it should be understood that the core concept is consistent with the present solution and is within the protection scope of the present application.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that it is obvious to those skilled in the art that various modifications and improvements can be made without departing from the principle of the present invention, and these modifications and improvements should also be considered as the protection scope of the present invention.
Claims (13)
1. The electromagnetic driving device is characterized by comprising a valve cover, a housing, a valve rod, a rotor, a transmission nut and a coil component, wherein the valve cover is fixedly connected with the housing, the coil component is fixedly installed on the outer peripheral part of the housing, the electromagnetic driving device is provided with a first cavity, the rotor and the transmission nut are contained in the first cavity, the rotor is located on the outer peripheral part of the transmission nut, the transmission nut is fixedly connected with or limited to the rotor, the valve rod is in threaded fit with the transmission nut, a valve cover hole is formed in the valve cover, at least part of the valve rod is located in a third cavity, a circumferential limiting pair is formed in the valve rod and the valve cover in a matched mode, the valve rod can axially displace along the valve cover hole, and the valve rod is limited to rotate towards the circumferential direction.
2. The electromagnetic driving device according to claim 1, wherein the axially relatively displaceable circumferential limiting pair comprises a first limiting portion and a second limiting portion, the first limiting portion protrudes upward from the body of the valve cover, and the first limiting portion is provided with a first limiting hole; the valve rod is provided with a second limiting part matched with the first limiting hole.
3. The electromagnetic driving device according to claim 2, wherein the second position-limiting portion has a second position-limiting surface, the second position-limiting surface is a multi-surface or profile structure having at least two or more surfaces, and the structure of the first position-limiting hole is adapted to the second position-limiting surface.
4. The electromagnetic drive of claim 3, wherein the body of the drive nut extends downwardly to form a second cavity, and the circumferential stop pair is located in the second cavity.
5. The electromagnetic driving device according to claim 1, wherein the lower edge of the body of the transmission nut is rotatably connected with the valve cover and/or the housing through a bearing.
6. The electromagnetic driving device according to claim 5, wherein the valve cover is provided with a groove, a bearing is arranged in the groove, the transmission nut is fixedly connected with an inner ring of the bearing, and the transmission nut and the bearing rotate relative to the valve cover and the housing.
7. The electromagnetic drive of claim 6, wherein the lower end of the body of the drive nut has a lower end that fits the inner race of the bearing; and the body of the transmission nut above the lower end part radially extends out to form a limiting step part so as to provide axial limiting for the rotor.
8. The electromagnetic driving device according to claim 5 or 6, wherein the open end of the housing has a flange formed by bending, and the surface of the valve cover has a machined mounting surface for fixing the flange.
9. The electromagnetic drive of claim 8, wherein a seal is disposed between the open end of the housing and the valve cover.
10. The electromagnetic drive of claim 1, wherein mating teeth are provided between the outer surface of the drive nut and the inner wall of the rotor for synchronous rotation.
11. The electromagnetic driving device according to claim 10, wherein a limit stop ring is clamped on an end portion of the valve rod extending out of the transmission nut, a portion of the valve rod located in the second cavity has a radially extending limit step, and the limit stop ring and the limit step can respectively abut against the transmission nut to form a stroke limit for linear displacement of the valve rod.
12. The electromagnetic drive device according to claim 1, further comprising a bearing, wherein the bearing comprises an inner ring, a rolling element, and an outer ring, the drive nut comprises a lower end portion and an extension portion, the extension portion is fixedly connected or abutted to the lower end portion of the rotor, the lower end portion is fixedly connected or abutted to the inner ring, a gap is provided between the lower end portion and the valve cover end portion of the valve cover, the outer ring is fixedly connected to the housing and/or the valve cover, and the drive nut, the inner ring, and the rotor can rotate together relative to the housing and the valve cover.
13. A fuel gas proportional valve is provided with a valve cavity, and comprises a valve seat, a first electromagnetic driving device, a servo driving device and an electromagnetic driving device, wherein the valve seat is provided with an inlet and an outlet, fuel gas flows in from the inlet and flows out from the outlet, the valve cavity is further provided with a pressure difference adjusting device, the valve seat is provided with a first valve port, a second valve port and a third valve port, the first valve port corresponds to the first electromagnetic driving device, the second valve port corresponds to the servo driving device, the third valve port corresponds to the electromagnetic driving device, the electromagnetic driving device further comprises a diaphragm assembly, the diaphragm assembly comprises a valve plug and a diaphragm, and the electromagnetic driving device can drive the valve plug to axially and downwards approach the third valve port.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811645953.8A CN111379890A (en) | 2018-12-30 | 2018-12-30 | Electromagnetic driving device and gas proportional valve with same |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811645953.8A CN111379890A (en) | 2018-12-30 | 2018-12-30 | Electromagnetic driving device and gas proportional valve with same |
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| CN111379890A true CN111379890A (en) | 2020-07-07 |
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| CN201811645953.8A Pending CN111379890A (en) | 2018-12-30 | 2018-12-30 | Electromagnetic driving device and gas proportional valve with same |
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| CN108999983A (en) * | 2018-08-03 | 2018-12-14 | 海杰亚（北京）医疗器械有限公司 | A kind of flow control valve |
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2018
- 2018-12-30 CN CN201811645953.8A patent/CN111379890A/en active Pending
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|---|---|---|---|---|
| JP2002081565A (en) * | 2000-09-06 | 2002-03-22 | Kazumasa Onishi | Motor-operated control valve driving device |
| CN104791536A (en) * | 2014-01-20 | 2015-07-22 | 浙江三花股份有限公司 | Direct-acting type electric valve |
| CN205298665U (en) * | 2015-12-15 | 2016-06-08 | 保登科技股份有限公司 | Gas valve with centre pilot formula movable coil proportional valve |
| CN108953739A (en) * | 2018-07-20 | 2018-12-07 | 杭州强邦精密机械电器有限公司 | It relies on oneself current stabilization gas ratio valve and current stabilization method of relying on oneself |
| CN108999983A (en) * | 2018-08-03 | 2018-12-14 | 海杰亚（北京）医疗器械有限公司 | A kind of flow control valve |
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