CN215172641U

CN215172641U - Electromagnetic driving device and gas valve with same

Info

Publication number: CN215172641U
Application number: CN202120769544.XU
Authority: CN
Inventors: 不公告发明人
Original assignee: Zhejiang Sanhua Intelligent Controls Co Ltd
Current assignee: Zhejiang Sanhua Intelligent Controls Co Ltd
Priority date: 2021-04-15
Filing date: 2021-04-15
Publication date: 2021-12-14
Anticipated expiration: 2031-04-15

Abstract

The utility model provides an electromagnetic drive device and have this electromagnetic drive device's gas valve, electromagnetic drive device include first sleeve part, second sleeve part, first iron core and second iron core, and the one end of second sleeve part is and seals the column structure and with first iron core fixed connection or spacing connection, can prevent the leakage of gas.

Description

Electromagnetic driving device and gas valve with same

Technical Field

The utility model relates to an electromagnetic control and gas control technical field especially relate to an electromagnetic drive device and have this electromagnetic drive device's gas valve.

Background

The electromagnetic driving device is widely applied to a gas system as a safe electromagnetic device, and comprises a static iron core, an outer sleeve, an inner sleeve and a movable iron core, wherein the outer sleeve is positioned at the outer peripheral part of the inner sleeve and is fixedly connected with the static iron core, the inner sleeve is fixedly welded with the movable iron core, and how to improve the connection airtightness between the inner sleeve and the movable iron core so as to prevent gas leakage is a technical problem to be solved urgently for a person skilled in the art.

SUMMERY OF THE UTILITY MODEL

The application provides an electromagnetic driving device, which comprises a coil assembly, a magnetic conduction part, a first sleeve part, a second sleeve part, a first iron core and a second iron core, the magnetic conduction part is fixedly connected or in limited connection with the coil assembly, the first sleeve part is positioned at the peripheral part of the second sleeve part, the second sleeve part is provided with a containing cavity, the first iron core is positioned in the containing cavity, part of the second iron core is positioned in the containing cavity, and the second iron core are arranged in the containing cavity along the height direction of the electromagnetic driving device, the first iron core is positioned above the second iron core, the second sleeve part is connected with the first iron core in a limiting or fixed way, one end of the second sleeve part close to the magnetic conduction part is of a closed structure, the second sleeve part can be in sliding fit with the second iron core, the second sleeve portion comprises a top wall portion, and at least part of the first iron core is abutted against the top wall portion.

The application also provides a gas valve, including the valve body, still include electromagnetic drive device, proportion regulator and pressure differential adjusting device, the valve body is equipped with the gas passageway, still includes first valve oral area, second valve oral area and third valve oral area, electromagnetic drive device includes coil pack, magnetic conduction portion, first sleeve part, second sleeve part, first iron core and second iron core, first sleeve part is located the part the peripheral part of second sleeve part, second sleeve part is close to the one end of magnetic conduction portion is the closed form structure, first iron core is located in the second sleeve part, the part the second iron core is located in the second sleeve part, the second sleeve part with first iron core limit connection or fixed connection still include first piston part and second piston part, first piston part with second sleeve part limit connection, the second piston component is fixedly connected with the second iron core, the first piston component can be close to or far away from the first valve opening part, the second piston component can be close to or far away from the second valve opening part, the diaphragm assembly of the proportional pressure regulating device can be close to or far away from the third valve opening part so as to influence the pressure of the gas channel and act on the buffer back pressure air cavity of the differential pressure regulating device, and the electromagnetic driving device is the electromagnetic driving device stated above.

This application carries out optimal design through the structure to electromagnetic drive device, and the one end that second sleeve section is close to magnetic conduction portion is closed column structure, and second sleeve section supports with the roof portion including top wall portion, at least partial first iron core, can improve the condition of being connected the gas tightness between second sleeve section spare and the first iron core in order to prevent that the gas from taking place to leak.

Drawings

Fig. 1 is a cross-sectional view of an overall structure of a first embodiment of an electromagnetic driving device provided by the present invention;

fig. 2 is a cross-sectional view of the overall structure of a second embodiment of the electromagnetic driving device provided by the present invention;

fig. 3 is a cross-sectional view of the overall structure of a third embodiment of the electromagnetic driving device provided by the present invention;

fig. 4 is a cross-sectional view of the overall structure of a fourth embodiment of the electromagnetic driving device provided by the present invention;

FIG. 5 is a schematic sectional view showing the overall structure of a gas valve having the structure of the solenoid actuator of FIG. 1

Detailed Description

In order to make the technical solution of the present invention better understood by those skilled in the art, the following detailed description is made with reference to the accompanying drawings and the detailed description.

The present application provides an electromagnetic driving device, referring to fig. 1, which is a first embodiment provided by the present application, and includes a coil assembly 10, the coil assembly 10 includes a coil component 11 and a magnetizer 12, the coil component 11 can be press-fitted into an accommodating space of the magnetizer 12 to achieve a fixed connection with the magnetizer 12, the magnetizer 12 is provided with a magnetizer through hole 121, and further includes a magnetic conductive portion, in this embodiment, the magnetic conductive portion is a static iron core 20, a portion of the static iron core 20 is located in the magnetizer through hole 121, and the static iron core 20 is fixedly connected with the magnetizer 12, in order to enhance the magnetic conductive performance, a bushing assembly having a magnetic conductive performance may further be included, and includes an upper bushing and a lower bushing, a horizontal portion of the upper bushing is clamped between an upper portion of the magnetizer 12 and a frame of the coil component 11, an extension portion of the upper bushing protrudes axially downward from the horizontal portion, and a further portion of the static iron core 20 is located in the upper bushing, the horizontal part of the lower bush is clamped between the lower part of the magnetizer 12 and the framework of the coil part 11, the extension part of the lower bush axially and upwardly protrudes from the horizontal part, part of the first sleeve part 30 is positioned in the lower bush, the first sleeve part 30 is approximately in a cylindrical structure, the upper end part of the first sleeve part 30 is fixedly connected with the static iron core 20, for example, the upper end part can be welded and fixed after interference press-fitting, the lower end part of the first sleeve part 30, the magnetizer 12 and the lower bush approximately limit an accommodating part, and a sealing element is arranged in the accommodating part to prevent the gas from leaking towards the direction of the coil part; the electromagnetic driving device further comprises a second sleeve part 40, the first sleeve part 30 is located at the outer periphery of a part of the second sleeve part 40, the second sleeve part 40 is roughly in a tubular structure with one end being in a closed structure and the other end being in an open structure, the top wall part 41 and a part of the side wall part 43 of the second sleeve part 40 roughly define the closed structure forming the second sleeve part 40, one end of the second sleeve part 40 close to the static iron core 20 is in a closed structure, the first sleeve part 30 can be in sliding guiding fit with the second sleeve part 40, the second sleeve part 40 is provided with a containing cavity 40A, the first iron core 50 is wholly located in the containing cavity 40A, a part of the second iron core 60 is located in the containing cavity 40A, the first iron core 50 is located above the second iron core 60 along the height direction of the electromagnetic driving device, in the power-off state, the first iron core 50 is in clearance fit with the second iron core 60, a small clearance is formed between the first iron core 50 and the second iron core 60, as shown in the figure, a gap L2 is formed between the first iron core and the second iron core, a distance L1 is formed between the lower end surface of the stationary iron core 20 and the upper end surface of the first iron core 50, wherein L1 is greater than L2, when the coil component is in a power-on state, the first iron core 50 and the second iron core 60 attract each other to eliminate the small gap L2, an elastic component 90 is arranged between the first iron core 50 and the second iron core 60, the second iron core 60 can be in sliding guiding fit with the second sleeve component 40, the second sleeve component 40 further comprises a top wall portion 41, at least a part of the upper end surface of the first iron core 50 is abutted against the top wall portion 41, by the arrangement, at least a part of the upper end surface of the first iron core 50 is abutted against the top wall portion 41 of the second sleeve component 40, so that the upper end surface of the first iron core is relatively close to the stationary iron core, under the power-on action, when the first iron core and the second iron core attract each other to form an integrated movable iron core, the stationary iron core can be smoothly moved towards the stationary iron core until the stationary iron core attracts, under the action of energization and excitation, the first iron core 50 and the second iron core 60 are attracted to form an integral movable iron core structure which can approach towards the direction of the stationary iron core 20 until the stationary iron core is attracted to the stationary iron core, the first iron core 50 is provided with a concave part 51, the concave part 51 is inwards recessed from the peripheral wall of the first iron core 50 for forming, the side wall of the second sleeve part 40 is provided with a convex part 42, at least part of the convex part 42 is positioned in the concave part 51, specifically, the convex part 42 matched with the concave part 51 is formed by being clamped on the side wall by an external tool aiming at the concave part 51 with force, the convex part 42 is clamped and limited with the concave part 51 to enable the second sleeve part 40 to be limited and connected with the first iron core 50, the lower end part of the second sleeve part 40 is limited and connected with the first piston part 70, the lower end part of the second iron core 60 is limited and connected with the second piston part 80, and the first piston part 70 can approach to or be far away from the first valve opening part of the valve body of the gas valve, the second piston member 80 can be close to or away from the second valve port portion of the valve body;

briefly describing the operation principle of the electromagnetic driving device, when the coil component 11 is energized, the second movable core 60 is attracted to the first movable core 50 to form an integral movable core component, the first movable core, the second movable core and the second sleeve component move axially upward toward the stationary core 20, the top wall 41 moves toward the stationary core 20, the first piston component 70 opens the first valve opening, and the second piston component 80 opens the second valve opening; when the coil component 11 is powered off, the second iron core 60 is separated from the first iron core 50 by the restoring force of the elastic component 90, the magnetic force disappears, the first iron core is separated from the stationary iron core 20, the second sleeve component, the first movable core and the second movable core move axially downward, the first piston component 70 closes the first valve opening, and the second piston component 80 closes the second valve opening.

Through the structure optimization setting to second sleeve part structure and first movable core, make second sleeve part be the sleeve structure that one end is closed column structure, second sleeve part and first movable core are spacing to be connected, and the top wall portion of second sleeve part offsets with at least partial first movable core mutually, compare the inner skleeve of background art with the welded fastening of iron core, the structure is simpler, and avoided leading to the fact the sleeve pipe to warp because of welding process unstable and lead to the dead or unreliable risk nature of welding of action card, the leakproofness of being connected of second sleeve part and first movable core has been improved relatively, the hidden danger of the gas that has first sleeve part and second sleeve part towards second sleeve part internal leakage has been reduced relatively.

A second embodiment of the electromagnetic driving device of the present application will be briefly described with reference to fig. 2, which differs from the first embodiment in that a stationary iron core structure is eliminated, a magnetic conductive ring 20' is used instead, the structure of the first sleeve member 30' and the manner of matching the first movable core with the second sleeve member 40', the second sleeve member 40' also includes a top wall portion 41', the top wall portion 41' abuts against at least a portion of the upper end surface of the first movable core 50, the first movable core 50 is integrally press-fitted into the accommodating cavity 40A ', the outer peripheral wall of the first movable core 50 is in interference fit with the inner peripheral wall of the side wall portion 43' of the second sleeve member 40' to realize the fixed connection of the first movable core and the second sleeve member, the first sleeve member 30' is generally in a sleeve structure with one end being a closed structure and the other end being opened, a portion of the first sleeve member 30' is located in the through hole 121 of the magnetic conductive body, and another portion of the first sleeve member 30' is located in the magnetic conductive ring 20' to realize the better positioning of the first sleeve member 30 The magnetic conductive ring 20 'is an upper magnetic conductive ring, a portion of the magnetic conductive ring is clamped between the magnetic conductor 12 and the frame of the coil component 11, the magnetic conductive ring 20' includes a horizontal portion and an extended portion, the extended portion axially protrudes downward from the horizontal portion, the top wall portion 41 'of the second sleeve component 40' can be close to or away from the top wall portion 31 'of the first sleeve component 30', and the related actuation manner and technical effects are specifically stated in the first embodiment and are not described again.

As shown in fig. 3, a third embodiment of the electromagnetic driving device provided by the present application is different from the second embodiment in that the second sleeve member 40 adopts the structure of the first embodiment, the first iron core 50 is provided with a concave portion 51, the concave portion 51 is formed by inward concave from the outer peripheral wall of the first iron core 50, the side wall of the second sleeve member 40 is provided with a protruding portion 42, at least a portion of the protruding portion 42 is located in the concave portion 51, specifically, the protruding portion 42 matched with the concave portion 51 is formed by forcibly clamping the side wall by an external tool aligned with the concave portion 51, the protruding portion 42 is engaged with the concave portion 51 for limiting connection of the second sleeve member 40 and the first iron core 50, the distance between the lower end surface of the magnetic conductive portion and the top wall 41 of the second sleeve member is set to be L1, the distance between the first iron core and the second iron core is set to be L1, if L1 is greater than L2, the operation manner and technical effects of the related components are described in detail in the first embodiment and are not described again;

fig. 4 is a fourth embodiment provided in the present application, which is different from the first embodiment in that a first iron core 50 is press-fit into a second sleeve part 40 to achieve a fixed connection between the first iron core and the second sleeve part, and the operation manner and technical effects of the related parts have been specifically stated in the first embodiment and are not repeated herein;

referring to fig. 5, the gas valve structure with the electromagnetic driving device provided by the present application will be described, wherein the electromagnetic driving device 100 is applied as a safety electromagnetic control device to a gas valve to ensure the safety of the gas, when one valve fails, the other valve can still close the valve opening part, the gas valve also comprises a proportional pressure regulating device 200 and a differential pressure regulating device 300, a valve body of the gas valve is provided with a first valve opening part 11a, a second valve opening part 12a and a third valve opening part 13a, gas enters an internal gas channel from the first valve opening part and the second valve opening part, after the gas pressure affecting the gas passage acts on the back pressure buffer chamber of the pressure difference adjusting device 300 through the diaphragm assembly of the proportional pressure adjusting device 200 approaching to or departing from the third valve opening portion 13a, then the reaction is carried out to a diaphragm component of the differential pressure regulating device, and the gas flow of the main valve port is finally influenced.

It should be noted that the terms of orientation, upper, lower, left and right, which are set forth in the description of the present invention, are defined with reference to the drawings shown in the drawings of the specification, and are only for the sake of understanding and convenience of description, and should not be construed to limit the scope of the present application, and the terms "first" and "second" as set forth in the present application are also interpreted as above.

The electronic expansion valve provided by the present invention is described in detail above. The principles and embodiments of the present invention have been explained herein using specific examples, and the above descriptions of the embodiments are only used to help understand the method and its core ideas of the present invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.

Claims

1. The electromagnetic driving device is characterized by comprising a coil assembly, a magnetic conduction part, a first sleeve part, a second sleeve part, a first iron core and a second iron core, wherein the magnetic conduction part is fixedly connected or in limited connection with the coil assembly, the first sleeve part is positioned at the peripheral part of the second sleeve part, one end, close to the magnetic conduction part, of the second sleeve part is of a closed structure, the second sleeve part is provided with an accommodating cavity, the first iron core is positioned in the accommodating cavity, part of the second iron core is positioned in the accommodating cavity, the first iron core is positioned above the second iron core along the height direction of the electromagnetic driving device, the second sleeve part is connected or fixedly connected with the first iron core in limited connection, the second sleeve part can be in sliding fit with the second iron core, and the second sleeve part comprises a top wall part, at least part of the first iron core is abutted against the top wall portion.

2. The electromagnetic driving device according to claim 1, wherein the first iron core is provided with a concave portion, the concave portion is formed by being concaved inwards from the outer peripheral wall of the first iron core, the side wall of the second sleeve member is provided with a protruding portion, at least a part of the protruding portion is located in the concave portion, the protruding portion is clamped and limited with the concave portion, and the upper end surface of the first iron core abuts against the top wall portion.

3. The electromagnetic drive device according to claim 1, wherein the first iron core is press-fitted into the receiving cavity of the second sleeve member, an outer peripheral wall of the first iron core is interference-fitted with an inner peripheral wall of the second sleeve member, and an upper end surface of the first iron core abuts against the top wall portion.

4. The electromagnetic driving device according to any one of claims 1 to 3, wherein the magnetic conductive portion is a stationary core, the coil assembly includes a coil component and a magnetic conductor, the coil component is fixedly connected to the magnetic conductor, the stationary core is fixedly connected to the magnetic conductor, the first sleeve component is fixedly connected to the stationary core, and the top wall portion can be close to or far from a lower end surface of the stationary core.

5. The electromagnetic drive of any one of claims 1-3, wherein the magnetic conductive portion is a magnetic conductive ring, the coil assembly includes a coil component and a magnetic conductive body, a portion of the magnetic conductive ring is clamped and limited between the magnetic conductive body and the coil component, the magnetic conductive body is provided with a magnetic conductive body through hole, one end of the first sleeve component is in a closed structure, a portion of the first sleeve component is located in the magnetic conductive body through hole, and another portion of the first sleeve component is located in the magnetic conductive ring.

6. The electromagnetic drive of claim 5, wherein the top wall portion of the second sleeve member is able to approach or move away from a top wall portion of the first sleeve member.

7. The electromagnetic drive of any one of claims 1-3, further comprising an elastic member, the elastic member being located between the first core and the second core.

8. The electromagnetic drive device according to any one of claims 1 to 3, further comprising a first piston member and a second piston member, wherein the first piston member is connected to the first sleeve member in a position-limited manner, and the second piston member is connected to the lower end portion of the second core in a position-limited manner.

9. The electromagnetic driving device according to claim 1, wherein a first distance L1 is formed between the magnetic conductive portion and the top wall portion, and a second distance L2 is formed between the first core and the second core, so that L1 > L2 is satisfied.

10. A gas valve comprises a valve body, an electromagnetic driving device, a proportion pressure regulating device and a pressure difference regulating device, wherein the valve body is provided with a gas channel, and further comprises a first valve opening part, a second valve opening part and a third valve opening part, the electromagnetic driving device comprises a coil assembly, a magnetic conduction part, a first sleeve part, a second sleeve part, a first iron core and a second iron core, the first sleeve part is positioned in part of the peripheral part of the second sleeve part, one end, close to the magnetic conduction part, of the second sleeve part is of a closed structure, the first iron core is positioned in the second sleeve part, part of the second iron core is positioned in the second sleeve part, the second sleeve part is in limit connection or fixed connection with the first iron core, and further comprises a first piston part and a second piston part, the first piston part is in limit connection with the second sleeve part, the second piston part is fixedly connected with the second iron core, the first piston part can be close to or far away from the first valve opening part, the second piston part can be close to or far away from the second valve opening part, the diaphragm assembly of the proportional pressure regulating device can be close to or far away from the third valve opening part so as to influence the pressure of the gas channel and act on the buffer back pressure air cavity of the differential pressure regulating device, and the electromagnetic driving device is in the structure of the electromagnetic driving device stated in any one of claims 1-3.