CN113108110B - Pilot drive structure and fuel gas proportional valve - Google Patents
Pilot drive structure and fuel gas proportional valve Download PDFInfo
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- CN113108110B CN113108110B CN202110286442.7A CN202110286442A CN113108110B CN 113108110 B CN113108110 B CN 113108110B CN 202110286442 A CN202110286442 A CN 202110286442A CN 113108110 B CN113108110 B CN 113108110B
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- pilot
- housing
- proportional valve
- gas proportional
- iron core
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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
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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
- F16K31/08—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid using a permanent magnet
- F16K31/082—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid using a permanent magnet using a electromagnet and a permanent magnet
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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
- F16K31/365—Actuating devices; Operating means; Releasing devices actuated by fluid in which fluid from the circuit is constantly supplied to the fluid motor the fluid acting on a diaphragm
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Magnetically Actuated Valves (AREA)
Abstract
The application provides a guide's drive structure and gas proportional valve. A pilot drive structure comprising: the electromagnetic driving part comprises an iron core and a driving coil sleeved outside the iron core, and can generate a magnetic field in a first direction at a first end when the driving coil is electrified; the magnetic suspension execution part comprises a housing with an opening at one end and a spring assembly, wherein the side wall of the housing is provided with a vent hole, the top of the housing is connected with the first end of the electromagnetic driving part, the spring assembly comprises a support spring and an execution part which is connected to the middle part of the support spring and is provided with a permanent magnet, and a circle of the support spring is limited on the inner wall of the housing; when the driving coil is electrified and the electromagnetic driving part generates a magnetic field in a first direction, the permanent magnet drives the execution part to move towards the pilot diaphragm group under the driving force of the repulsive force, and the pilot diaphragm group is extruded to adjust the opening size of a valve port of the pilot valve.
Description
Technical Field
The application relates to the technical field of proportional valves, in particular to a pilot drive structure and a fuel gas proportional valve.
Background
The wall-mounted boiler and the gas water heater are electrical equipment commonly used in families, and the gas proportional valve is a core part for controlling gas combustion of the wall-mounted boiler and the gas water heater.
In the prior art, the gas proportional valve is generally divided into a pilot type and a direct type, and the pilot type gas proportional valve has better pressure stabilizing capability than the direct type due to the servo feedback function of the pilot type structure. Specifically, the pilot pressure regulating diaphragm senses the fluctuation of the pressure and the flow at the outlet of the fuel gas proportional valve, and adjusts the back cavity pressure corresponding to the main valve diaphragm in real time, so as to quickly achieve the response and reduce the change of the outlet pressure, and further achieve the better pressure stabilizing effect. However, the existing pilot structure is generally a moving core type structure, in the structure, a moving iron core slides in a magnetism isolating sleeve, and a certain friction force exists, so that adjustment or certain pressure change exists each time, which is not beneficial to accurate adjustment of outlet flow of a proportional valve, influences combustion effect, especially influences more obviously during low-flow and low-power combustion, and is not beneficial to realizing stable combustion with lower power. And patent document for "TWM603073U" its setting that uses two reeds to suspend the case in guide's structure, though can solve the problem that can not accurate regulation that frictional force leads to, the reed stroke is less, and the resistance is great, and corresponding maximum flow value can reduce to some extent, and the structure is complicated, inconvenient installation, and the practicality is lower.
Therefore, further solution to the above technical problems is needed.
Disclosure of Invention
The main object of the present invention is to provide a pilot drive structure and a gas proportional valve, which can solve the above-mentioned problems.
In order to solve the above technical problem, an embodiment of the present application provides the following technical solutions:
in one aspect the present application provides a pilot drive structure comprising:
the electromagnetic driving part comprises an iron core and a driving coil sleeved outside the iron core, and can generate a magnetic field in a first direction at a first end when the driving coil is electrified;
the magnetic suspension executing part comprises a housing with an opening at one end and a spring assembly, wherein the side wall of the housing is provided with a vent hole, the top of the housing is connected with the first end of the electromagnetic driving part, the spring assembly comprises a supporting spring and an executing part which is connected to the middle of the supporting spring and is provided with a permanent magnet, one circle of the supporting spring is limited on the inner wall of the housing, so that the executing part is suspended in the housing, the permanent magnet generates a magnetic field in a second direction, and the magnetic field in the first direction and the magnetic field in the second direction repel each other;
the opening end of the housing is used for being connected with the gas proportional valve body, the execution component is opposite to a pilot diaphragm group of a pilot valve on the gas proportional valve body, and when the driving coil is electrified and the electromagnetic driving part generates a magnetic field in a first direction, the execution component moves towards the pilot diaphragm group direction under the action of repulsive force and pushes against the pilot diaphragm group so as to adjust the opening size of a valve port of the pilot valve.
The object of the present invention and the technical problems solved thereby can be further achieved by the following technical measures.
Optionally, the pilot drive structure of the preceding, wherein an axis of the core is coaxial with a central axis of the spring assembly.
Optionally, in the foregoing pilot driving structure, the electromagnetic driving portion further includes:
the top of the magnetic conduction frame is provided with a threaded through hole, the bottom of the magnetic conduction frame is provided with a bolt connecting part, the iron core and the driving coil are accommodated in the middle of the magnetic conduction frame, the first end of the iron core is provided with external threads, and the first end of the iron core is connected with the threaded through hole and extends out of the top end of the magnetic conduction frame to be connected with a nut;
the bottom bolt connecting part of the magnetic conduction frame is connected with the housing, and the iron core and the driving coil are clamped between the magnetic conduction frame and the housing.
Optionally, the aforementioned pilot driving structure, wherein the first end of the iron core has an operation slot.
Optionally, the pilot drive structure of the foregoing, wherein the actuator further comprises:
the lower reed support comprises a circular first base and a plurality of clamping hooks which are arranged on the edge of the first base and extend towards the direction far away from the first base;
the upper reed support comprises a round second base and a flanging which is arranged on the second base and extends towards the direction far away from the second base, and a plurality of gaps are formed in the flanging at intervals;
the middle part of the supporting reed is provided with a hollow part matched with the shape of the first base, the inner wall of the hollow part is provided with convex edges at intervals, the supporting reed is sleeved on the lower reed support, each convex edge is positioned between two adjacent clamping hooks on the first base, the lower reed support is buckled with the upper reed support, the clamping hooks penetrate through the openings and are clamped on the second base to form a containing space for containing the permanent magnet, and the convex edges are clamped between the lower reed support and the upper reed support.
Optionally, in the pilot driving structure, a pressing block is disposed on one side of the second base, which faces the lower spring support, and is used for pressing the permanent magnet in the accommodating space;
one side of the first base, which deviates from the clamping jaw, is provided with a jacking groove, and the jacking groove is a conical groove and is used for being matched with the protruding part of the guide diaphragm group.
Optionally, the aforementioned pilot driving structure further includes:
the gas proportional valve comprises a pressure washer, wherein a step is arranged on the periphery of the inner wall of the housing, the pressure washer is accommodated in the housing along the inner wall of the housing, the first side of the pressure washer clamps the periphery of the support reed on the step, and the second side of the pressure washer is used for abutting against the gas proportional valve body.
Optionally, the pilot driving structure further comprises a plurality of semi-spherical protrusions uniformly spaced on the first side of the compression washer, and/or a plurality of semi-spherical protrusions uniformly spaced on the second side of the compression washer.
Optionally, the pilot driving structure further comprises:
the end part of the opening end of the cover shell is provided with a groove or a step, the sealing ring is accommodated in the groove or the step of the end part of the opening end of the cover shell, and part of the sealing ring protrudes out of the groove or the step and is clamped between the cover shell and the gas proportional valve body.
In another aspect, the present application provides a gas proportional valve, including:
the fuel gas proportional valve comprises a fuel gas proportional valve body and a pilot drive structure;
the pilot drive structure includes:
the electromagnetic driving part comprises an iron core and a driving coil sleeved outside the iron core, and can generate a magnetic field in a first direction at a first end when the driving coil is electrified;
the magnetic suspension executing part comprises a housing with an opening at one end and a spring assembly, wherein the side wall of the housing is provided with a vent hole, the top of the housing is connected with the first end of the electromagnetic driving part, the spring assembly comprises a supporting spring and an executing part which is connected to the middle of the supporting spring and is provided with a permanent magnet, one circle of the supporting spring is limited on the inner wall of the housing, so that the executing part is suspended in the housing, the permanent magnet generates a magnetic field in a second direction, and the magnetic field in the first direction and the magnetic field in the second direction repel each other;
when the driving coil is electrified and the electromagnetic driving part generates a magnetic field in a first direction, the execution part moves towards the direction of the pilot diaphragm set by virtue of repulsive force and extrudes the pilot diaphragm set so as to adjust the opening size of a valve port of the pilot valve;
the pilot driving structure is connected with the gas proportional valve body and located above the pilot valve of the gas proportional valve body, and an execution part of the pilot driving structure is opposite to the pilot diaphragm group of the pilot valve.
By means of the technical scheme, the pilot drive structure and the fuel gas proportional valve at least have the following advantages:
the pilot driving structure provided by the embodiment of the invention comprises an electromagnetic driving part and a magnetic suspension executing part, wherein the spring assembly of the magnetic suspension executing part enables an executing component to be arranged in a housing in a suspension manner, and a permanent magnet is arranged in the executing component, so that after a driving coil of the electromagnetic driving part is electrified, a magnetic field in a first direction is generated at the first end of the driving component, a repulsive force is generated with the magnetic field in a second direction generated by the permanent magnet, and then the executing component can push the pilot diaphragm assembly on a gas proportional valve body under the action of the repulsive force so as to adjust the opening size of a valve port of a pilot valve. The pilot driving structure drives the execution component in a suspension state to move through the repulsive force of the magnetic field when executing the driving action, no friction is generated in the driving process or the operation process of the execution component, and better flow regulation repeatability and small flow accurate regulation can be realized; meanwhile, the execution part on the supporting reed is driven to move in a magnetic repulsion mode, the structure is relatively simple, complex assembly is avoided, the movement stroke during execution can be relatively large, the adjustment precision can be guaranteed, a large flow value can be achieved, and the practicability is high.
The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical solutions of the present invention more clearly understood and to implement them in accordance with the contents of the description, the following detailed description is given with reference to the preferred embodiments of the present invention and the accompanying drawings.
Drawings
The above and other objects, features and advantages of exemplary embodiments of the present application will become readily apparent from the following detailed description read in conjunction with the accompanying drawings. Several embodiments of the present application are illustrated by way of example and not by way of limitation in the figures of the accompanying drawings and in which like reference numerals refer to similar or corresponding parts and in which:
fig. 1 schematically shows a structural schematic of a pilot drive arrangement;
FIG. 2 is a schematic structural diagram of a gas proportional valve with a pilot driving structure provided by the first embodiment of the application;
FIG. 3 is a schematic diagram of a magnetic levitation actuator of a pilot drive structure;
fig. 4 schematically shows a structural view of a reed assembly of a pilot drive configuration;
fig. 5 schematically shows a perspective disassembled state structure diagram of a spring assembly of a pilot driving structure;
FIG. 6 schematically illustrates a top reed support structure of an actuator of a pilot drive configuration;
FIG. 7 is a schematic diagram of a lower reed support structure of an actuator of a pilot drive configuration;
fig. 8 schematically shows a structural view of a pressing washer of a pilot drive structure.
The reference numerals in fig. 1-8 are:
the gas proportional valve comprises an electromagnetic driving part 100, a magnetic suspension executing part 200, a gas proportional valve body 300, an iron core 1, a driving coil 2, a magnetic conduction frame 3, a nut 4, a housing 5, a vent hole 51, a reed component 6, a supporting reed 61, a hollow 611, a convex edge 612, an executing component 62, a lower reed support 621, a first base 6211, a clamping hook 6212, a jacking groove 6213, an upper reed support 622, a second base 6221, a flanging 6222, a notch 6223, a jacking block 6224, a permanent magnet 7, a pilot diaphragm group 8, a compression washer 9, a hemispherical protrusion 91 and a sealing ring 10.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
It is to be noted that, unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which this application belongs.
Example one
As shown in fig. 1-2, a pilot driving structure according to an embodiment of the present invention includes:
the electromagnetic driving part 100 comprises an iron core 1 and a driving coil 2 sleeved outside the iron core 1, and the electromagnetic driving part 100 can generate a magnetic field in a first direction at a first end when the driving coil 2 is electrified;
a magnetic suspension actuator 200, including a housing 5 with an opening at one end and a spring assembly 6, wherein the side wall of the housing 5 is provided with a vent hole 51, the top of the housing 5 is connected with the first end of the electromagnetic driving part 100, the spring assembly 6 includes a supporting spring 61 and an actuator 62 with a permanent magnet 7 connected to the middle of the supporting spring 61, a circle of the supporting spring 61 is defined on the inner wall of the housing 5, the actuator 62 is suspended in the housing 5, the permanent magnet 7 generates a magnetic field in a second direction, and the magnetic field in the first direction and the magnetic field in the second direction repel each other;
the opening end of the housing 5 is used for being connected with the gas proportional valve body 300, the actuating member 62 is opposite to the pilot diaphragm group 8 of the pilot valve on the gas proportional valve body 300, and when the driving coil 2 is energized and the electromagnetic driving portion 100 generates a magnetic field in the first direction, the actuating member 62 is subjected to a repulsive force to move towards the pilot diaphragm group 8, and pushes against the pilot diaphragm group 8, so as to adjust the opening size of the valve port of the pilot valve.
Specifically, the electromagnetic driving portion 100 operates on the same principle as an electromagnet, that is, a magnetic force is generated by the iron core 1 disposed in the middle portion when the driving coil 2 is supplied with power, that is, the magnetic field in the first direction is generated, and the magnitude of the magnetic field in the first direction can be adjusted by adjusting the current supplied to adjust the magnitude of the repulsive force of the actuating member 62 disposed in the middle portion with a permanent magnet. One end of the electromagnetic driving unit 100, i.e. one end of the iron core 1 and one end of the driving coil 2, faces the housing 5 of the magnetic levitation actuator 200, preferably vertically.
The casing 5 of the magnetic suspension execution part 200 needs to have an opening at one end and also needs to have a vent hole 51 for communicating air on the side wall, that is, the side wall is provided with a through hole, because the casing 5 seals the spring assembly 6 in the casing 5 after the gas proportional valve body 300 is connected, when the pilot diaphragm assembly is driven by the pilot driving part to be adjusted, the sealed environment can change the pressure of the sealed cavity above the pilot diaphragm assembly, and further affect the adjustment precision, so the pilot diaphragm assembly needs to be communicated with air. In order to prevent the fuel gas leakage from exceeding the standard after the diaphragm of the pilot diaphragm set is broken, the aperture of the minimum throttling position of the vent hole 51 is generally not more than 0.7mm, and the specific form of the vent hole 51 can be a straight-through hole or a vent hole 51 formed by arranging a vent channel, namely, the inside and the outside of the housing 5 can be communicated through the vent hole 51.
The shape of the housing 5 can be determined according to actual needs, and the preferred inner cavity is a circular section to be adapted to the preferred circular spring assembly 6, so as to ensure that the actuating component 62 can be arranged in the middle of the supporting spring 61, and thus, uniform stress can be applied during magnetic driving, and accurate control can be achieved. The support spring 61 of the spring assembly 6 can be made of a material with a suitable structure and a suitable elastic modulus according to the requirement, as long as the support spring 61 has good rebound resetting performance.
A circumference of the support spring 61 may be defined in the cavity of the housing 5 by a pressing member, for example, an elastic rubber ring; it can also be fixed in the housing 5 by means of a plurality of bolts, but it is necessary to ensure uniformity of the fixing position.
The permanent magnet 7 is required to be arranged in the actuating member 62, so that the magnetic field in the second direction generated by the permanent magnet 7 can generate a repulsive force with the magnetic field in the first direction of the electromagnetic driving part 100, and the repulsive force acts on the actuating member 62, so that the actuating member 62 can press the guide diaphragm group 8. It should be noted that the actuator 62 needs to be arranged in the middle of the support spring 61 to ensure that when the permanent magnet 7 in the actuator 62 receives the repulsive force and the actuator 62 deforms with the support spring 61, the actuator 62 can receive a uniform force, thereby ensuring the precision of the driving motion, i.e. improving the adjustment precision.
It should be noted that the magnetic field in the first direction generated by the first end of the driving coil 2 of the electromagnetic driving unit 100 after the power is applied may correspond to the N-pole magnetic field or the S-pole magnetic field of the magnet, and the magnetic field in the second direction generated by the permanent magnet provided in the actuator 62 on the side opposite to the first end of the electromagnetic driving unit 100 may be the N-pole magnetic field or the S-pole magnetic field in the same direction as the magnetic field in the first direction.
The pilot driving structure provided by the embodiment of the invention comprises an electromagnetic driving part 100 and a magnetic suspension executing part 200, wherein a spring assembly 6 of the magnetic suspension executing part 200 is arranged in a housing 5 in a suspending way, and a permanent magnet 7 is arranged in the executing part 62, so that after a driving coil 2 of the electromagnetic driving part 100 is electrified, a first end of the driving part generates a magnetic field in a first direction and generates a repulsive force with a magnetic field in a second direction generated by the permanent magnet 7, and the executing part 62 can extrude a pilot diaphragm set 8 on a gas proportional valve body 300 under the action of the repulsive force so as to adjust the opening size of a valve port of the pilot valve. It can be seen that when the pilot drive structure of the present application performs a driving action, the execution component 62 in a suspension state is driven to move by the repulsive force of the magnetic field, no friction is generated in the driving process or the operation process of the execution component 62, and better repeatability of flow adjustment and small flow precise adjustment can be realized; meanwhile, the execution part 62 on the support reed 61 is driven to move in a magnetic repulsion mode, the structure is relatively simple, complex assembly is avoided, the movement stroke during execution can be relatively large, the adjustment precision can be guaranteed, the flow value is large, and the practicability is high.
As shown in fig. 1, in a specific implementation, the axis of the iron core 1 is coaxial with the central axis of the reed assembly 6.
Specifically, the axis of the driving coil 2 is also coaxial with the axis of the iron core 1, and by arranging the axis of the iron core 1 to be coaxial with the central axis of the spring assembly 6, the axis of the iron core 1 passes through the center of the actuating part 62, namely, the center of the permanent magnet 7 in the middle of the actuating part 62, so that the repulsive force generated by the two magnetic fields can act on the center of the actuating part 62, namely, the center of the spring assembly 6, and the effect of precise driving can be achieved, and the adjusting precision is further improved.
As shown in fig. 1, in a specific implementation, the electromagnetic driving portion 100 further includes: the top of the magnetic conduction frame 3 is provided with a threaded through hole, the bottom of the magnetic conduction frame 3 is provided with a bolt connection part, the iron core 1 and the driving coil 2 are accommodated in the middle of the magnetic conduction frame 3, the first end of the iron core 1 is provided with an external thread, and the first end of the iron core 1 is connected with the threaded through hole, extends out of the top end of the magnetic conduction frame 3 and is connected with a nut 4;
the bottom bolt connecting part of the magnetic conduction frame 3 is connected with the housing 5, and the iron core 1 and the driving coil 2 are clamped between the magnetic conduction frame 3 and the housing 5.
Specifically, the driving coil 2 may have a bracket sleeved on the iron core 1 through the bracket, and elastic interference protrusions, such as rubber or silica gel protrusions, may be disposed at both ends of the iron core 1 and the driving coil 2 contacting the housing 5.
Further, the first end of the iron core 1 may be provided with an operation slot, such as a straight slot, a cross slot, a polygonal slot, etc., and a screwdriver may be further engaged with the operation slot at the first end of the iron core 1 to drive the iron core 1 to rotate, so as to adjust the magnetic force between the initial permanent magnet 7 and the electromagnetic driving portion 100.
As shown in fig. 1 and fig. 3-7, in a specific implementation, the executing unit 62 further includes: the lower spring plate bracket 621 comprises a round first base 6211 and a plurality of clamping hooks 6212 arranged at the edge of the first base 6211 and extending in the direction far away from the first base 6211; the upper spring support 622 comprises a round second base 6221 and a flange 6222 arranged on the second base 6221 and extending in the direction away from the second base 6221, wherein a plurality of notches 6223 are arranged at intervals on the flange 6222;
the middle part of the supporting reed 61 is provided with a hollow 611 matched with the first base 6211 in shape, convex edges 612 are arranged at intervals on the inner wall of the hollow 611, the supporting reed 61 is sleeved on the lower reed support 621, each convex edge 612 is positioned between two adjacent clamping hooks 6212 on the first base 6211, the lower reed support 621 is buckled with the upper reed support 622, the clamping hooks 6212 penetrate through the gaps 6223 and are clamped on the second base 6221 to form an accommodating space for accommodating the permanent magnet 7, and the convex edge 612 is clamped between the lower reed support 621 and the upper reed support 622.
Specifically, the locking structures of the lower spring support 621 and the upper spring support 622 can be interchanged, i.e., the hook 6212 and the slit 6223 can be interchanged, for example, the hook 6212 can be disposed on the second base 6221, and the slit 6223 and the flange 6222 can be disposed on the first base 6211. The above-mentioned snap-fit structure between the lower spring support 621 and the upper spring support 622 is only one preferred structure, and is not limited to the specific form of the snap-fit structure therebetween, for example, the lower spring support 621 and the upper spring support 622 are snap-fit to form a receiving space, and may also be formed by fastening with screws. It should be noted that no matter what kind of fastening method forms the accommodation space, it is necessary to clamp the support reed 61 between the two in a clamping manner, and keep the lower reed support 621 and the upper reed support 622 after fastening in the middle of the support reed 61, so that the center of gravity of the actuating component is in the middle of the reed, thereby realizing any angle installation of the gas proportional valve without affecting the adjustment precision.
Further, a pressing block 6224 is disposed on one side of the second base 6221 facing the lower spring support 621, and is used for pressing the permanent magnet 7 in the accommodating space; one side of the first base 6211, which is away from the clamping jaw, is provided with a jacking groove 6213, and the jacking groove 6213 is a conical groove and is adapted to the convex part of the guide diaphragm group 8.
As shown in fig. 1 and fig. 8, in a specific implementation, the pilot driving structure provided in the embodiment of the present invention further includes: the gas proportional valve comprises a pressure washer 9, a step is arranged on the periphery of the inner wall of the housing 5, the pressure washer 9 is accommodated in the housing 5 along the inner wall of the housing 5, the periphery of the support reed 61 is clamped on the step by the first side of the pressure washer 9, and the second side of the pressure washer 9 is used for abutting against the gas proportional valve body 300.
Specifically, the pressing washer 9 may be in an interference fit with the inner wall of the housing 5, so that when the pressing washer 9 is not pressed between the housing 5 and the gas proportional valve body 300, the pressing washer 9 may initially press the support reed 61, so that the support reed 61 is positioned in the housing 5. The second side of the pressing washer 9 needs to protrude a certain distance from the end of the opening end of the housing 5, so that when the housing 5 is connected with the gas proportional valve body 300, the pressing washer 9 can be pressed between the housing 5 and the gas proportional valve body 300, and the supporting reed 61 is clamped tightly. Wherein the pressing washer 9 may be made of plastic material, rubber material or silica gel material, and is preferably made of plastic material.
Further, a plurality of hemispherical protrusions 91 are uniformly spaced on the first side of the compression washer 9, and/or a plurality of hemispherical protrusions 91 are uniformly spaced on the second side of the compression washer 9.
Specifically, by additionally providing the hemispherical protrusions 91 at both sides of the pressure washer 9, respectively, the hemispherical protrusions 91 may be provided at only one side. Wherein, the setting of hemisphere protruding 91 can be connected the back of tightening through the bolt with the gas proportional valve body at guide's drive structure, and hemisphere protruding 91 is easily by crushing deformation to will support reed 61 compaction, do not influence the position of executive component relative guide diaphragm subassembly.
As shown in fig. 1, in a specific implementation, the pilot driving structure provided in the embodiment of the present invention further includes: and a sealing ring 10, wherein a groove or a step is arranged at the end part of the opening end of the cover 5, the sealing ring 10 is accommodated in the groove or the step at the end part of the opening end of the cover 5, and part of the sealing ring protrudes out of the groove or the step, and is clamped between the cover 5 and the gas proportional valve body 300.
Specifically, the seal ring 10 may be made using a conventional elastic sealing material, such as rubber, silicone, or the like.
It should be noted that the working principle of the gas proportional valve with pilot structure is known to the skilled person, and is not described herein. Therefore, only the working principle of the pilot drive structure provided by the embodiment of the invention is described here:
the electromagnetic driving part 100 and the magnetic suspension executing part 200 of the pilot driving structure can be fixed on the gas proportional valve body 300 together through long bolts, the driving coil 2 is clamped between the magnetic conduction frame 3 and the housing 5 through the long bolts, the pressing gasket 9 is clamped between the housing 5 and the gas proportional valve body 300 through the long bolts, the supporting reed 61 is clamped between the pressing gasket 9 and the inner step of the housing 5, and the sealing ring 10 is clamped between the housing 5 and the gas proportional valve body 300 through the long bolts to realize sealing connection; after the fixed connection, the iron core 1 faces the actuating component 62 inside the housing 5, and the actuating component 62 faces the middle of the pilot diaphragm group 8 of the pilot valve on the gas proportional valve body 300.
Then, when power is supplied to the driving coil 2, the driving coil 2 and the iron core 1 in the middle form an electromagnet structure, a magnetic field in a first direction can be generated at one end of the electromagnetic driving portion 100 facing the housing 5, the magnetic field in the first direction and the magnetic field in a second direction of the permanent magnet 7 in the actuating component 62 repel each other, a repulsive force acts on the actuating component 62, the actuating component 62 forces the supporting reed 61 to elastically deform and extrude the pilot diaphragm group 8, the magnitude of the pressure of the actuating component 62 extruding the pilot diaphragm group 8 can be adjusted by adjusting the magnitude of the input current, the magnitude of the opening of the valve port of the pilot valve can be adjusted, and finally the magnitude of the opening of the valve port of the main valve can be adjusted by acting on the main valve of the gas proportional valve body 300.
Example two
The gas proportional valve provided by the second embodiment of the invention comprises a pilot drive structure and a gas proportional valve body 300; the pilot drive structure includes: the electromagnetic driving part 100 comprises an iron core 1 and a driving coil 2 sleeved outside the iron core 1, and the electromagnetic driving part 100 can generate a magnetic field in a first direction at a first end when the driving coil 2 is electrified;
a magnetic suspension actuator 200, including a housing 5 with an opening at one end and a spring assembly 6, wherein the side wall of the housing 5 is provided with a vent hole 51, the top of the housing 5 is connected with the first end of the electromagnetic driving part 100, the spring assembly 6 includes a supporting spring 61 and an actuator 62 with a permanent magnet 7 connected to the middle of the supporting spring 61, a circle of the supporting spring 61 is defined on the inner wall of the housing 5, the actuator 62 is suspended in the housing 5, the permanent magnet 7 generates a magnetic field in a second direction, and the magnetic field in the first direction and the magnetic field in the second direction repel each other; the opening end of the housing 5 is used for being connected with a gas proportional valve body 300, the actuating member 62 is opposite to a pilot diaphragm group 8 of a pilot valve on the gas proportional valve body 300, and when the driving coil 2 is electrified and the electromagnetic driving portion 100 generates a magnetic field in a first direction, the actuating member 62 is subjected to a repulsive force to move towards the pilot diaphragm group 8, and pushes against the pilot diaphragm group 8, so as to adjust the opening size of a valve port of the pilot valve;
the pilot driving structure is connected to the gas proportional valve body 300 and located above the pilot valve of the gas proportional valve body 300, and the actuating member 62 of the pilot driving structure is opposite to the pilot diaphragm group 8 of the pilot valve.
Specifically, the pilot driving structure described in the second embodiment may directly use the pilot driving structure provided in the first embodiment, and specific implementation structures may refer to relevant contents described in the first embodiment, and are not described herein again.
The pilot driving structure used by the gas proportional valve provided by the embodiment of the invention comprises an electromagnetic driving part 100 and a magnetic suspension executing part 200, wherein the spring assembly 6 of the magnetic suspension executing part 200 suspends the executing component 62 in the housing 5, and the executing component 62 is provided with the permanent magnet 7, so that after the driving coil 2 of the electromagnetic driving part 100 is electrified, a magnetic field in a first direction is generated at the first end of the driving component, a repulsive force is generated between the magnetic field in a second direction generated by the permanent magnet 7, and the executing component 62 can push against the pilot diaphragm assembly 8 on the gas proportional valve body 300 under the action of the repulsive force so as to adjust the opening size of the valve port of the pilot valve. It can be seen that when the pilot drive structure of the present application performs a driving action, the execution component 62 in a floating state is driven to move by the repulsive force of the magnetic field, no friction is generated in the driving process or the operation process of the execution component 62, and better repeatability of flow adjustment and small flow precise adjustment can be realized; meanwhile, the execution part 62 on the support reed 61 is driven to move in a magnetic repulsion mode, the structure is relatively simple, complex assembly is avoided, the movement stroke during execution can be relatively large, the adjustment precision can be guaranteed, the flow value is large, and the practicability is high.
It will be appreciated that the relevant features of the devices described above may be referred to one another. In addition, "first", "second", and the like in the above embodiments are for distinguishing the embodiments, and do not represent merits of the embodiments.
In the description provided herein, numerous specific details are set forth. It is understood, however, that embodiments of the invention may be practiced without these specific details. In some instances, well-known structures and techniques have not been shown in detail in order not to obscure an understanding of this description.
The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (10)
1. A pilot drive structure, comprising:
the electromagnetic driving part comprises an iron core and a driving coil sleeved outside the iron core, and can generate a magnetic field in a first direction at a first end when the driving coil is electrified;
the magnetic suspension executing part comprises a housing with an opening at one end and a spring assembly, wherein the side wall of the housing is provided with a vent hole, the top of the housing is connected with the first end of the electromagnetic driving part, the spring assembly comprises a supporting spring and an executing part which is connected to the middle of the supporting spring and is provided with a permanent magnet, one circle of the supporting spring is limited on the inner wall of the housing, so that the executing part is suspended in the housing, the permanent magnet generates a magnetic field in a second direction, and the magnetic field in the first direction and the magnetic field in the second direction are mutually repelled;
the opening end of the housing is used for being connected with the gas proportional valve body, the execution component is opposite to a pilot diaphragm group of a pilot valve on the gas proportional valve body, and when the driving coil is electrified and the electromagnetic driving part generates a magnetic field in a first direction, the execution component moves towards the pilot diaphragm group direction under the action of repulsive force and pushes against the pilot diaphragm group so as to adjust the opening size of a valve port of the pilot valve.
2. The pilot drive arrangement according to claim 1,
the axis of the iron core is coaxial with the central axis of the spring assembly.
3. The pilot drive structure according to claim 1 or 2, wherein the electromagnetic drive portion further includes:
the top of the magnetic conduction frame is provided with a threaded through hole, the bottom of the magnetic conduction frame is provided with a bolt connecting part, the iron core and the driving coil are accommodated in the middle of the magnetic conduction frame, the first end of the iron core is provided with external threads, and the first end of the iron core is connected with the threaded through hole and extends out of the top end of the magnetic conduction frame to be connected with a nut;
the bottom bolt connecting part of the magnetic conduction frame is connected with the housing, and the iron core and the driving coil are clamped between the magnetic conduction frame and the housing.
4. The pilot drive arrangement according to claim 3,
the first end of the iron core is provided with an operation slot.
5. The pilot drive arrangement according to claim 1 or 2, wherein the actuator further comprises:
the lower reed support comprises a circular first base and a plurality of clamping hooks which are arranged at the edge of the first base and extend towards the direction far away from the first base;
the upper reed support comprises a round second base and a flanging which is arranged on the second base and extends towards the direction far away from the second base, and a plurality of gaps are formed in the flanging at intervals;
the middle part of the supporting reed is provided with a hollow part matched with the shape of the first base, the inner wall of the hollow part is provided with convex edges at intervals, the supporting reed is sleeved on the lower reed support, each convex edge is positioned between two adjacent clamping hooks on the first base, the lower reed support is buckled with the upper reed support, the clamping hooks penetrate through the openings and are clamped on the second base to form a containing space for containing the permanent magnet, and the convex edges are clamped between the lower reed support and the upper reed support.
6. Pilot drive structure as claimed in claim 5,
a pressing block is arranged on one side, facing the lower reed support, of the second base and used for tightly pressing the permanent magnet in the accommodating space;
one side of the first base, which is deviated from the clamping hook, is provided with a jacking groove, and the jacking groove is a conical groove and is used for being matched with the protruding part of the guide diaphragm group.
7. The pilot drive structure according to claim 1 or 2, further comprising:
the gas proportional valve comprises a pressure washer, wherein a step is arranged on the periphery of the inner wall of the housing, the pressure washer is accommodated in the housing along the inner wall of the housing, the first side of the pressure washer clamps the periphery of the support reed on the step, and the second side of the pressure washer is used for abutting against the gas proportional valve body.
8. The pilot drive arrangement according to claim 7,
the first side of the compression washer is provided with a plurality of hemispherical bulges at uniform intervals, and/or the second side of the compression washer is provided with a plurality of hemispherical bulges at uniform intervals.
9. The pilot drive structure according to claim 1 or 2, further comprising:
the end part of the opening end of the cover shell is provided with a groove or a step, the sealing ring is accommodated in the groove or the step of the end part of the opening end of the cover shell, and part of the sealing ring protrudes out of the groove or the step and is clamped between the cover shell and the gas proportional valve body.
10. A gas proportioning valve comprising:
a gas proportional valve body, the pilot drive arrangement of any of claims 1-9;
the pilot driving structure is connected with the gas proportional valve body and located above the pilot valve of the gas proportional valve body, and an execution part of the pilot driving structure is opposite to the pilot diaphragm group of the pilot valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110286442.7A CN113108110B (en) | 2021-03-17 | 2021-03-17 | Pilot drive structure and fuel gas proportional valve |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110286442.7A CN113108110B (en) | 2021-03-17 | 2021-03-17 | Pilot drive structure and fuel gas proportional valve |
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| CN113108110A CN113108110A (en) | 2021-07-13 |
| CN113108110B true CN113108110B (en) | 2023-01-03 |
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| CN202110286442.7A Active CN113108110B (en) | 2021-03-17 | 2021-03-17 | Pilot drive structure and fuel gas proportional valve |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| DE202011052220U1 (en) * | 2011-12-07 | 2013-03-11 | Eto Magnetic Gmbh | Bistable electromagnetic actuator and camshaft actuator |
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| JP2000046228A (en) * | 1998-07-28 | 2000-02-18 | Denso Corp | Flow rate control valve |
| JP2004162806A (en) * | 2002-11-13 | 2004-06-10 | Fujikin Inc | Diaphragm type electromagnetic driving valve |
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| Publication number | Publication date |
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| CN113108110A (en) | 2021-07-13 |
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