An electromagnetic drive device and a gas valve having the same

Abstract

The present invention provides an electromagnetic drive device and a gas valve with the electromagnetic drive device, comprising a clamping piece, a magnetizer and a sleeve, wherein the magnetizer is provided with a magnetizer through hole, a magnetizer body and a clamping portion, wherein the clamping portion protrudes upward relative to the magnetizer body, the clamping portion comprises an extension portion and a hook, the magnetizer is provided with an accommodating portion, the clamping piece comprises a matching portion and a clamping piece body, part of the clamping piece body is located in the magnetizer through hole, part of the clamping piece body is located in the sleeve and connected to the sleeve, the matching portion protrudes roughly radially outward, the matching portion comprises a stopping portion, the stopping portion can be elastically deformed, at least part of the stopping portion is located in the accommodating portion, the hook abuts against the stopping portion, and the clamping piece is formed by plastic material.

Description

Technical Field

[0001] The present invention relates to the technical field of electromagnetic control or gas control, and in particular to an electromagnetic drive device and a gas valve having the electromagnetic drive device. Background Art

[0002] The gas proportional valve includes a valve body, which is provided with a valve port, an electromagnetic drive device and a pressure difference adjustment device. The electromagnetic drive device includes a coil component, a magnetic conductor and an adjustment mechanism. In addition, a mounting piece is required to cooperate with the thread of the adjustment structure. The mounting piece is fixedly connected to the magnetic conductor by tightening screws. Summary of the invention

[0003] The main purpose of the present application is to provide an electromagnetic drive device and a gas valve having the electromagnetic drive device, which can make the connection between the engaging member and the magnetic conductor relatively convenient.

[0004] The present application provides an electromagnetic drive device, including a clamping piece, a magnetizer and a sleeve, the magnetizer is provided with a magnetizer through hole, and also includes a magnetizer body and a clamping portion, the clamping portion protrudes upward relative to the magnetizer body, the clamping portion includes an extension portion and a hook, the extension portion extends roughly along the axial direction of the electromagnetic drive device, the hook protrudes toward the axial direction close to the electromagnetic drive device, the magnetizer is provided with an accommodating portion, the clamping piece includes a matching portion and a clamping piece body, the matching portion protrudes roughly radially toward the axial direction away from the electromagnetic drive device, part of the clamping piece body is located in the magnetizer through hole, part of the clamping piece body is located in the sleeve and connected to the sleeve, the matching portion is provided with a notch portion, and also includes a stopping portion, at least part of the stopping portion is located in the accommodating portion, the hook abuts against the matching portion, the clamping portion can be deformed toward the notch portion, and the clamping piece is formed by plastic material. The present application also provides a gas valve, including a valve body, the valve body is provided with a first valve port, a second valve port, a third valve port, a main valve port and a gas flow channel, and also includes a safety electromagnetic drive device, an electromagnetic drive device and a pressure difference regulating device, the safety electromagnetic drive device includes a main valve plug and a secondary valve plug, the main valve plug can approach or move away from the first valve port, the secondary valve plug can approach or move away from the second valve port, the electromagnetic drive device includes a diaphragm assembly, the diaphragm assembly can approach or move away from the third valve port, and act on the gas flow channel through the third valve port to affect the cache back pressure chamber of the pressure difference regulating device.

[0005] The present invention can make the connection between the engaging member and the magnetic conductor relatively convenient by improving the structure of the electromagnetic driving device. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] Figure 1A cross-sectional view of the overall structure of the gas valve provided for this application;

[0007] Figure 2 A cross-sectional view of the structure of the electromagnetic drive device provided in this application;

[0008] Figure 3 A three-dimensional schematic diagram of the adjustment mechanism provided for this application;

[0009] Figure 4 Specific implementation method of the three-dimensional schematic diagram of the regulating valve stem provided in this application

[0010] It should be noted that the present application optimizes the design of the structure of the electromagnetic drive device, with an emphasis on protecting the connectors, magnetic conductors, adjustment mechanisms, and regulating valve stems as well as their coordination with each other. Other moving core components, static iron cores, or coil structures may be adaptively improved according to customer or gas system requirements. The present application merely exemplifies that the electromagnetic drive device protected may be applied to the gas valve structure of the gas system. It should be noted that the application of the structure of the present application in other products should also fall within the scope of protection of the present application.

[0011] The first embodiment of the present invention is described in detail below in conjunction with the accompanying drawings. Figure 1 As shown, the present invention provides a gas valve, including a valve body, the valve body is provided with an inlet 1a and an outlet 1b, the valve body 1 is also provided with a first valve port 11, a second valve port 12, a third valve port, i.e., a proportional regulating valve port 103, a main valve port 104, and a gas flow channel 105, the valve body of the gas valve can be formed by aluminum alloy die casting, the gas valve also includes a safety electromagnetic drive device 100, an electromagnetic drive device 200 and a pressure difference regulating device 300, the safety electromagnetic drive device 100 includes a main valve plug and an auxiliary valve plug, the main valve plug can approach or move away from the first valve port 11, the auxiliary valve plug can approach or move away from the auxiliary valve plug 12, the safety electromagnetic drive device 100 is fixedly connected to the valve body 1 as a whole, and the safety electromagnetic drive device 100 is used as a safety control device of the gas valve. To ensure the safety of gas use, when the first valve port 101 cannot be closed smoothly, the auxiliary valve plug can still close the second valve port 12, and the electromagnetic drive device 200 includes a diaphragm assembly, which can be close to or away from the third valve port 103. When the diaphragm assembly is relatively close to the third valve port 103, the gas pressure acting on the gas flow channel 105 increases, thereby acting on the buffer back pressure cavity 1A of the pressure difference regulating device 300, so that the gas flow through the main valve port is relatively large; or when the diaphragm assembly is relatively far away from the third valve port 103, the gas pressure acting on the gas flow channel 105 is relatively reduced, thereby acting on the buffer back pressure cavity 1A of the pressure difference regulating device 300, so that the gas flow through the main valve port 104 is relatively small, thereby realizing the regulation of the gas flow.

[0012] Combine the following Figure 1 and Figure 2 The electromagnetic drive device provided in the present application is described in detail. The electromagnetic drive device 200 includes a coil component and a magnetizer 202. The coil component is integrally press-fitted into the magnetizer 202. The electromagnetic drive device 200 also includes a clamping member 203, a magnetizing bushing and a sleeve. The magnetizer 202 is provided with a first magnetizer through hole. The clamping member 203 includes a matching portion 2031 and a clamping member body 2032. The matching portion 2031 protrudes roughly radially in a direction away from the axis of the electromagnetic drive device. The clamping member 203 also includes a clamping member body 2032. The clamping member body 2032 is downward relative to the matching portion 2031. The protrusion is partly located in the first magnetic conductor through hole and cooperates with a small gap with the inner wall portion where the first magnetic conductor through hole is located, partly extends into the sleeve to achieve an interference fit with the sleeve, or one of the engaging body 2032 and the sleeve is provided with a protrusion, and the other is provided with a recessed portion that cooperates with the protrusion, and the engaging part 203 and the sleeve are connected by a snap connection to achieve a limited connection. It should be noted that the connection mentioned in the present application includes both a fixed connection and a limited connection, and the engaging part 203 includes an internal threaded portion 2033 to provide a threaded guide for the adjusting part 204.

[0013] The magnetizer 202 includes a magnetizer body that is roughly flat and a latching portion 2022. The latching portion 2022 protrudes upward in the direction away from the coil component and roughly along the axial direction of the electromagnetic drive device. The latching portion 2022 includes an extension portion 2022a and a hook 2022b. The latching portion 2022 protrudes upward relative to the magnetizer body. The extension portion 2022a extends roughly along the axial direction of the electromagnetic drive device 200, and the hook 2022b protrudes roughly in the radial direction toward the axial direction of the electromagnetic drive device. The magnetizer 202 is also provided with a limit The limiting groove 2021 is closer to the adjusting member 204 than the locking portion 2022. The magnet 202 is further provided with a receiving portion 2022c. The extending portion 2022a, the hook 2022b and the upper end surface of the magnet 202 roughly define the receiving portion 2022c. The matching portion 2031 of the engaging member 203 includes a positioning portion 20311. The positioning portion 20311 is roughly a protrusion facing the limiting groove 2021. At least part of the positioning portion 20311 is located in the limiting groove 2021 to prevent the engaging member 203 from being relatively The magnetizer 202 rotates in a circumferential direction, the matching portion 2031 is provided with a notch portion 20313, and also includes a stop portion 20312. The notch portion 20313 is roughly defined between the positioning portion 20311 and the stop portion 20312. The stop portion 20312 roughly extends downward along the axial direction of the electromagnetic drive device. The stop portion 20312 is roughly a thin-walled structure. The stop portion 20312 is at least partially located in the accommodating portion 2022c. When the engaging member 203 is installed in the magnetizer, the stop portion 20312 can be elastically deformed as a whole, and the stop portion 20312 is locked. The portion 20312 as a whole can be deformed toward the notch portion 20313 and then inserted into the accommodating portion to achieve the interference between the hook 2022b and the mating portion 2031. The engaging member 203 is formed by plastic material. Compared with the background technology, the engaging member and the magnetic conductor are fixedly connected by tightening screws. In this application, the engaging member is configured as a plastic material structure and the magnetic conductor is limitedly connected by a snap connection. The engaging member as a whole can be integrally injection molded, which makes the connection more convenient and reduces the use of parts, thereby achieving product abbreviation.

[0014] Combine the following Figure 2-Figure 4 The adjusting member and the adjusting rod structure of the electromagnetic drive device provided by the present application are described in detail. Figure 3The adjusting member 202 shown includes an external threaded portion 2043 for threadedly mating with the internal threaded portion 2033 of the engaging member 203. The lower end portion of the external threaded portion 2043 of the adjusting member 202 is a guide portion for facilitating the installation of the adjusting member 202 into the engaging member 203. The adjusting member 202 also includes an operating portion 2042, which is located on the outer peripheral surface of the upper end portion of the adjusting member 202. In this embodiment, the operating portion 2042 can be set to a hexagonal nut structure, and the hexagonal operating portion 2042 is exposed at the upper end surface of the matching portion 2031, so as to facilitate the mating with an external hexagonal wrench so that the adjusting rod 202 can be axially lifted and lowered relative to the engaging member 203 through the threaded mating action, so as to further accurately adjust the gas when the outlet pressure of the gas valve is in a relatively high pressure state. In order to facilitate and meet the adjustment stroke, the lower end surface of the operating portion 202 is set to be higher than the upper end surface of the matching portion 2031. When the coil component is in a power-off state, such as Figure 2 As shown, the upper end of the valve stem of the moving core component is against the regulating valve stem 205. When the coil component is in the energized state, the moving core component as a whole moves downward close to the static iron core due to the excitation of the coil, and the outlet pressure state of the gas valve is in a relatively high pressure state. When it is necessary to continue to increase the combustion of the gas in this state, a hexagonal wrench tool can be used to clamp the operating part 2042 of the hexagonal surface structure, and the adjusting part 204 is moved axially downward relative to the engaging part 203 through the threaded cooperation, until the lower end conical surface of the operating part 2042 is against the cooperation part 2031. At this time, the upper end of the valve stem continues to act downward due to the excitation until the upper end of the valve stem is against the supporting part of the adjusting part 202. In order to ensure the strength of the parts, the adjusting part 202 can be formed of metal materials such as stainless steel as a whole. Of course, the adjusting part 202 can also be formed of plastic materials.

[0015] Furthermore, the electromagnetic drive device 200 further includes a regulating valve stem 205, such as Figure 4 The regulating valve stem 205 shown includes an external threaded portion 2052 for threaded cooperation with the internal threaded portion of the engaging member 204, and also includes a notch portion 2051, at least two notches 2051 are provided to facilitate cooperation with an external special adjustment tool such as a flat-head screwdriver. Through the threaded cooperation, the regulating valve stem 205 can perform axial lifting and lowering movement relative to the engaging member 204, so as to further accurately adjust the gas flow under low pressure when the gas valve outlet pressure is in a relatively low pressure state. The regulating valve stem can be processed and formed by plastic material, and the upper end surface 205a of the regulating valve stem 205 is not lower than the upper end surface 2042a of the engaging member 202.

[0016] Through the above-mentioned arrangement, compared with the traditional background technology, no matter when adjusting the engaging part or the regulating valve stem, it is necessary to use a special tool to reach into the engaging part to adjust the initial pressure, which is not convenient for the manufacturer in terms of visibility or adjustment operation. Through the above-mentioned arrangement, when adjusting the initial pressure, a more intuitive and visual adjustment and operation can be performed through a hexagonal wrench or a flat-head screwdriver, and the visualization is stronger when adjusting the extreme stroke of the axial lifting movement of the adjusting part 204 relative to the engaging part 203, which further facilitates the operator to adjust the initial pressure of the electromagnetic drive device.

[0017] It should be noted that the ordinal numbers such as "first, second" and the directional words such as "upper, lower" mentioned in the present invention are all described based on the drawings in the specification. They are only used to distinguish the naming methods of different components and should not be considered to have any restrictions on the order of the components. The above are only preferred embodiments of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. An electromagnetic drive device, characterized in that: The invention comprises a clamping member, a magnetizer and a sleeve, wherein the magnetizer is provided with a magnetizer through hole, a magnetizer body and a clamping portion, wherein the clamping portion protrudes upward relative to the magnetizer body, the clamping portion comprises an extension portion and a hook, the extension portion extends roughly along the axial direction of the electromagnetic drive device, the hook protrudes toward the axial direction close to the electromagnetic drive device, the magnetizer is provided with an accommodating portion, the clamping member comprises a matching portion and a clamping member body, the matching portion protrudes roughly radially toward the axial direction away from the electromagnetic drive device, part of the clamping member body is located in the magnetizer through hole, part of the clamping member body is located in the sleeve and connected to the sleeve, the matching portion is provided with a notch portion, and also comprises a stopping portion, the stopping portion extends roughly downward along the axial direction of the electromagnetic drive device, at least part of the stopping portion is located in the accommodating portion, the hook abuts against the matching portion, the stopping portion can be deformed toward the notch portion, and the clamping member is formed by plastic material.

2. The electromagnetic drive device according to claim 1, characterized in that: The magnetic conductor is provided with a limiting groove, and the matching portion includes a positioning portion, which protrudes substantially toward the limiting groove, and at least a part of the positioning portion is located in the limiting groove, and the notch portion is formed between the positioning portion and the locking portion.

3. The electromagnetic drive device according to claim 1, characterized in that: The electromagnetic drive device also includes an adjusting member, which is threadedly matched with the engaging member. The adjusting member includes an operating portion, which is located on the outer peripheral surface of the upper end portion of the adjusting member and exposed at the upper end surface of the matching portion.

4. The electromagnetic drive device according to claim 3, characterized in that: The operating portion is a hexagonal nut-shaped structure, and by cooperating with a hexagonal wrench tool, the adjusting member can be axially lifted and lowered relative to the engaging member.

5. The electromagnetic drive device according to claim 3, characterized in that: The electromagnetic drive device also includes a regulating valve stem, which is threadedly matched with the regulating member. The regulating valve stem includes at least two notches, and the upper end surface of the regulating valve stem is not lower than the upper end surface of the engaging member.

6. The electromagnetic drive device according to claim 5, characterized in that: The notch cooperates with an external flat-blade screwdriver to enable the regulating valve stem to perform axial lifting and lowering motion relative to the regulating member.

7. The electromagnetic drive device according to claim 5, characterized in that: The regulating valve stem is formed by processing from plastic material.

8. The electromagnetic drive device according to claim 1, characterized in that: The locking portion is generally in a thin-walled structure.

9. A gas valve, characterized in that: It includes a valve body, which is provided with a first valve port, a second valve port, a third valve port, a main valve port and a gas flow channel, and also includes a safety electromagnetic drive device, an electromagnetic drive device and a pressure difference regulating device, the safety electromagnetic drive device includes a main valve plug and a sub-valve plug, the main valve plug can approach or move away from the first valve port, the sub-valve plug can approach or move away from the second valve port, the electromagnetic drive device includes a diaphragm assembly, the diaphragm assembly can approach or move away from the third valve port, act on the gas flow channel through the third valve port to affect the cache back pressure chamber of the pressure difference regulating device, and the electromagnetic drive device is the electromagnetic drive device structure described in any one of claims 1 to 8.

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