Electromagnetic driving device and gas proportional valve with same

Abstract

The invention relates to an electromagnetic driving device and a fuel gas proportional valve with the electromagnetic driving device, the fuel gas proportional valve comprises a valve seat, the valve seat is provided with a valve port part, the electromagnetic driving device comprises a movable core part, a sleeve, a magnetic conductive part and a sealing part, the movable core part is in sliding fit with the sleeve, and the magnetic conductive part is of an integrated stretching forming structure; the magnetic conducting piece comprises a body part and a boss part protruding from the body part to the movable core part, and the movable core part can be close to or away from the boss part; the sleeve is provided with a clamping protrusion part facing the boss part, the boss part is provided with a clamping position part, the clamping protrusion part and the clamping position part limit the sealing piece, one side part of the sealing piece is matched with the sleeve part in a sealing mode, and the other side part of the sealing piece is matched with the boss part in a sealing mode. According to the electromagnetic driving device, the product cost can be reduced, and the part processing technology can be relatively simplified.

Description

Technical Field

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

[0002] The gas proportional valve includes a valve body and an electromagnetic drive device. The valve body is provided with a valve mouth. The electromagnetic drive device includes a static iron core, a magnetic shell, a sleeve and a moving core component. The static iron core and the magnetic shell are fixed by riveting. The static iron core usually needs to be machined to form a mounting groove. The seal is limited in the mounting groove. The seal and the sleeve are sealed in cooperation. The moving core component is slidably cooperated with the inner wall of the sleeve. A sealing plug is connected to the lower end of the moving core component. The moving core component can approach or move away from the static iron core to make the sealing plug approach or move away from the valve mouth. The static iron core has a high cost and a complicated processing process. Summary of the invention

[0003] The purpose of the present application is to provide an electromagnetic drive device and a gas proportional valve having the electromagnetic drive device, which can reduce product costs and relatively simplify the parts processing process.

[0004] The present application provides an electromagnetic drive device, including a moving core component, a sleeve, a magnetic conductive component and a sealing component. The moving core component and the sleeve are slidably matched, the magnetic conductive component is an integral stretch-formed structure, the magnetic conductive component includes a body portion and a boss portion protruding from the body portion toward the moving core component, and the moving core component can approach or move away from the boss portion;

[0005] The sleeve is provided with a convex portion facing the boss portion, the boss portion is provided with a positioning portion, the convex portion and the positioning portion limit the seal, one side of the seal is sealed with the sleeve portion, and the other side of the seal is sealed with the boss portion.

[0006] The present invention provides an electromagnetic drive device and a gas proportional valve having the electromagnetic drive device. The magnetic conductive part is arranged as an integral stretching molding structure, which can achieve the reduction of parts cost. The structure comprises a main body part and a boss part protruding toward a moving core part. The sealing part can be limited by the convex part of the sleeve and the locking part of the boss part, thereby reducing the parts cost and relatively simplifying the processing technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 It is a structural schematic diagram of a gas proportional valve provided by an embodiment of the present application;

[0008] Figure 2 yes Figure 1 A partial enlarged view of the

[0009] Figure 3 is a structural schematic diagram of a gas proportional valve provided in another embodiment of the present application;

[0010] Figure 4 yes Figure 3 A partial enlarged view of the

[0011] Figure 5 yes Figure 4 Enlarged view of B.

[0012] Attached Figure 1-Figure 5 In the figure, the reference numerals are described as follows:

[0013] 100-electromagnetic drive device; 200-valve seat, 210-valve port, 220-inlet, 230-outlet; 300-proportional adjustment device;

[0014] 1-moving core component, 11-connecting end, 12-first moving iron core, 13-second moving iron core, 14-second spring, 15-conical groove, 16-limiting groove;

[0015] 2-magnetic conductive member, 21-top wall, 211-opening portion, 22-body portion, 23-side wall, 24-boss portion, 241-cone portion, 242-locking portion, 243-positioning portion;

[0016] 3-sleeve, 31-protruding portion, 32-end of sleeve;

[0017] 4- coil;

[0018] 5- Skeleton;

[0019] 6- first spring;

[0020] 7-sealing plug, 71-supporting member, 72-first sealing block, 73-second sealing block, 74-sealing top wall, 741-through hole portion, 75-sealing side wall, 76-accommodating space;

[0021] 8- Seal;

[0022] 9-extension tube, 91-bending portion, 92-flange;

[0023] 10- buffer;

[0024] 101-accommodation slot. DETAILED DESCRIPTION

[0025] In order to enable those skilled in the art to better understand the technical solution of the present application, the present application is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0026] The embodiment of the present application provides an electromagnetic drive device and a gas proportional valve having the electromagnetic drive device, wherein: Figure 1As shown, the gas proportional valve includes a valve seat 200, an electromagnetic driving device 100 and a proportional adjustment device 300. The valve seat 200 is provided with a valve port 210, an inlet 220 and an outlet 230. The electromagnetic driving device 100 is provided at the inlet 220 and forms a switch for controlling the gas proportional valve by opening and closing the valve port 210. The proportional adjustment device 300 is used to adjust and control the amount of gas discharged from the outlet 230. Specifically, how to adjust and control the amount of gas discharged from the outlet 230 by the proportional adjustment device 300 is already a well-known prior art for those skilled in the art, and will not be described in detail here to save space.

[0027] like Figure 1 and Figure 2 As shown, the electromagnetic drive device 100 includes a moving core component 1, a magnetic conductive component 2, a sleeve 3, a coil 4 and a sealing component 8, wherein the magnetic conductive component 2 is an integrally stretched structure, and the magnetic conductive component 2 includes a main body portion 22 and a boss portion 24, the boss portion 24 protrudes from the main body portion 22 toward the moving core component 1, the moving core component 1 is slidably matched with the sleeve 3, and the moving core component 1 can approach or move away from the boss portion 24.

[0028] The coil 4 is arranged around the circumference of the sleeve 3, that is, the sleeve 3 is located at the center of the coil 4, and the moving core component 1 is partially located in the sleeve 3 and can slide along the axial direction of the sleeve 3 to approach or move away from the boss portion 24. The boss portion 24 forms a structure similar to a static iron core, and there is no need to set up a static iron core separately. In this way, the overall structure can be effectively optimized, the manufacturing process can be simplified, the use of parts can be reduced, the production cost can be reduced, and the product stability can be improved.

[0029] like Figure 2 As shown, the magnetic conductive part 2 also includes a top wall 21 and a side wall 23, the side wall 23 is connected between the top wall 21 and the main body 22, and encloses a shell with a cavity. The electromagnetic drive device also includes a skeleton 5, the sleeve 3, the skeleton 5 and the coil 4 are located in the cavity, and the coil 4 is arranged around the periphery of the skeleton 5.

[0030] like Figure 2 As shown, the boss portion 24 is located in the sleeve 3, and a seal 8 is provided between the outer wall of the boss portion 24 and the inner wall of the sleeve 3, the inner wall of the sleeve 3 is provided with a convex portion 31 facing the boss portion 24, the boss portion 24 is provided with a clamping portion 242, the convex portion 31 and the clamping portion 242 limit the seal 8, specifically, one side of the seal 8 is sealed with the sleeve 3, and the other side of the seal 8 is sealed with the boss portion 24. In other words, the seal 8 is sandwiched between the sleeve 3 and the boss portion 24, and is limited by the convex portion 31 and the clamping portion 242, ensuring that the seal 8 can stably achieve a sealing effect between the sleeve 3 and the boss portion 24, avoiding the situation where gas enters the sleeve 3 and leaks in the open state, and ensuring safety.

[0031] Specifically, in this embodiment, there is no limitation on the structure of the protruding portion 31. Figure 2 and Figure 4 As shown, the side wall 23 of the sleeve 3 may be formed into a protrusion by stamping, or a block structure may be fixed on the inner wall of the sleeve 3 by welding or integral molding, and the convex portion 31 may be an annular structure continuously arranged along the circumference of the sleeve 3, or a plurality of protrusions arranged at intervals along the circumference of the sleeve 3, and no specific limitation is made here.

[0032] like Figure 5 As shown, the boss portion 24 includes a frustum portion 241 , a locking portion 242 and a positioning portion 243 arranged in sequence along the axial direction, wherein the cross-sections of the frustum portion 241 and the locking portion 242 are both gradually tapered from the positioning portion 243 toward one side of the frustum portion 241 .

[0033] The locking portion 242 is a tapered structure, which is conducive to cooperating with the locking protrusion 31 to limit the seal 8, reduce the processing accuracy requirements, and thus reduce the processing cost.

[0034] A conical groove 15 matched with the frustum portion 241 is provided at one end of the moving core component 1 facing the boss portion 24. When the moving core component 1 moves toward one side of the boss portion 24, the frustum portion 241 can be inserted into the conical groove 15. The setting of the frustum portion 241 and the conical groove 15 can play a guiding role and reduce the axial occupied space, thereby facilitating a miniaturized setting.

[0035] like Figure 2 and Figure 5 As shown, a buffer 10 is also provided at one end of the moving core component 1 facing the boss portion 24. After the coil 4 is energized, the moving core component 1 can move toward the side of the boss portion 24 until the buffer 10 abuts against the end of the boss portion 24. At this time, it means that the moving core component 1 has moved into place. The setting of the buffer 10 can avoid direct rigid collision between the moving core component 1 and the boss portion 24, thereby avoiding wear and deformation of the two due to the collision, thereby ensuring the service life. Specifically, as Figure 2 and Figure 5 As shown, a mounting groove is provided at the bottom of the tapered groove 15 , and the buffer member 10 is located in the mounting groove and can abut against the end of the frustum portion 241 of the boss portion 24 .

[0036] The sleeve 3 includes a sleeve end 32, a frame 5 and a positioning portion 243 to limit the sleeve end 32. Specifically, Figure 5As shown, one side surface of the sleeve end 32 abuts against the frame 5, and the other side surface of the sleeve end 32 abuts against the positioning portion 243. Specifically, the sleeve end 32 is located in the frame 5, and the outer side surface of the sleeve end 32 abuts against the frame 5, and the inner side surface of the sleeve end 32 abuts against the positioning portion 243. The positioning portion 243 is located in the sleeve end 32, and the outer diameter of the positioning portion 243 is matched with the inner diameter of the sleeve 3. The positioning portion 243 is inserted into the sleeve 3 for installation, which can ensure that the installation position of the magnetic conductive member 2 is accurate and stable, and can also ensure that the limiting effect on the sleeve 3 is stable.

[0037] The sealing member 8 is sleeved on the outer periphery of the locking portion 242, and the sealing member 8 abuts against the outer wall of the locking portion 242. At the same time, the sealing member 8 abuts against the inner wall of the sleeve 3 on the side where the locking protrusion 31 faces the main body 22, specifically, the inner wall of the sleeve 3 on the side where the locking protrusion 31 faces the main body 22, and sealing is achieved from here.

[0038] like Figure 5 As shown, the electromagnetic drive device is also provided with a receiving groove 101, the inner wall of the part of the sleeve 3 facing the side of the main body 22 of the locking protrusion 31 constitutes a part of the groove wall of the receiving groove 101, the outer wall of the locking portion 242 constitutes at least another part of the groove wall of the receiving groove 101, and the sealing member 8 is located in the receiving groove 101 to ensure the position stability of the sealing member 8.

[0039] The moving core component 1 includes a connecting end 11, and the electromagnetic drive device 100 also includes a first spring 6 and a sealing plug 7, wherein the sealing plug 7 can be fixed to the connecting end 11 of the moving core component 1, and the first spring 6 is clamped between the sealing plug 7 and the top wall 21. The spring force of the first spring 6 can act on the sealing plug 7 to move it to the side away from the top wall 21 and seal it with the valve mouth 210.

[0040] When the coil 4 is in a power-off state, the sealing plug 7 is only acted upon by the spring force of the first spring 6, the sealing plug 7 blocks the valve mouth 210, and the gas proportional valve is in a closed state; and when the coil 4 is in a power-on state, the moving core component 1 can move to fit with the boss portion 24. During this process, the moving core component 1 can drive the sealing plug 7 to move to the side away from the valve mouth 210 through the connecting end 11. Since the force of the moving core component 1 on the sealing plug 7 is greater than the spring force of the first spring 6, the sealing plug 7 is separated from the valve mouth 210, the first spring 6 is further compressed, and the valve mouth 210 is opened. After the coil 4 is powered off, the force of the moving core component 1 on the sealing plug 7 disappears, and the first spring 6 acts on the sealing plug 7 to make it fit and seal with the valve mouth 210.

[0041] like Figure 2 and Figure 4As shown, a support member 71 is further provided on the side of the sealing plug 7 away from the valve mouth portion 210, and the first spring 6 is clamped between the support member 71 and the top wall 21. The support member 71 is used to support the sealing plug 7. Specifically, the support member 71 can be made of metal or plastic material, etc., and its hardness is greater than the hardness of the sealing plug 7. The spring force of the first spring 6 can act on the support member 71 to drive the sealing plug 7 to fit with the valve mouth portion 210.

[0042] To ensure safety, two sealing structures need to be set in the gas proportional valve, which can be as follows: Figure 1 As shown, a sealing structure is provided between the sealing plug 7 of the electromagnetic drive device 100 and the valve opening 210 of the valve seat 200, and another sealing structure is provided in the proportional adjustment device 300, or, as shown in FIG. Figure 3 As shown, two sealing structures are directly arranged between the sealing plug 7 of the electromagnetic drive device 100 and the valve mouth portion 210 of the valve seat 200. At this time, there is no need to arrange a sealing structure in the proportional adjustment device 300, so as to avoid the setting of the sealing structure affecting the proportional adjustment or stability of the proportional adjustment device 300.

[0043] Specifically, when two sealing structures are provided between the electromagnetic drive device 100 and the valve port 210, as shown in FIG. Figure 3-Figure 5 As shown, the sealing plug 7 includes two sealing blocks, a first sealing block 72 and a second sealing block 73, and the two sealing blocks can respectively and individually seal the valve mouth part 210, wherein the first spring 6 is clamped between the first sealing block 72 and the top wall 21, and the support member 71 is also arranged on the side of the first sealing block 72 facing the first spring 6, and the spring force of the first spring 6 can act on the first sealing block 72 to make it fit and seal with the valve mouth part 210 to form a first sealing structure, and the second sealing block 73 is fixedly connected or limit-connected to the connecting end 11 of the moving core component 1 to form a second sealing structure.

[0044] The electromagnetic drive device 100 further includes an extension tube 9 which is movable axially relative to the sleeve 3 . The extension tube 9 is partially located in the housing, and the end of the extension tube 9 extends out of the opening 211 of the top wall 21 and is connected to the first sealing block 72 .

[0045] like Figure 4 and Figure 5As shown, the moving core component 1 includes a first moving iron core 12 and a second moving iron core 13 which are arranged in sequence along the axial direction, wherein the first moving iron core 12 is partially located in the sleeve 3, and the first moving iron core 12 is also connected to the extension tube 9, the second moving iron core 13 is located in the extension tube 9 and is provided with a connecting end 11, which extends out of the extension tube 9 and is connected to the second sealing block 73, and a second spring 14 is also sandwiched between the first moving iron core 12 and the second moving iron core 13, and in the power-off state, the gap between the first moving iron core 12 and the second moving iron core 13 is smaller than the gap between the second moving iron core 13 and the boss portion 24.

[0046] When the coil 4 is energized, the top wall 21 of the magnetic conductive part 2 conducts electromagnetic energy with the second moving iron core 13 through the radial gap of the opening portion 211, causing it to move to one side of the first moving iron core 12, and at the same time, the first moving iron core 12 moves to one side of the boss portion 24. Since the gap between the first moving iron core 12 and the boss portion 24 is larger than the gap between the first moving iron core 12 and the second moving iron core 13, when the coil 4 is energized, the second moving iron core 13 is preferentially attracted to the first moving iron core 12, and then the moving core component 1 moves toward the boss portion 24 as a whole. During this process, the first moving iron core 12 drives the first sealing block 72 to disengage from the valve mouth portion 210 through the extension tube 9, and the second moving iron core 13 drives the second sealing block 73 to disengage from the valve mouth portion 210, thereby opening the two sealing structures at the same time, and the gas proportional valve is in an open state, and the first spring 6 and the second spring 14 are both in a compressed state.

[0047] When the coil 4 is powered off, the first spring 6 can act on the first sealing block 72 to move it to one side of the valve seat 200 and seal it with the valve mouth 210. The first sealing structure is sealed, and as the first sealing block 72 moves, the first sealing block 72 can also drive the extension tube 9 to move to one side of the valve seat 200, and at the same time drive the first moving iron core 12 to move to the side away from the boss portion 24, and the movement of the first moving iron core 12 can drive the second moving iron core 13 to move to the side away from the boss portion 24. At the same time, the second spring 14 sandwiched between the first moving iron core 12 and the second moving iron core 13 can further act on the second moving iron core 13 to drive the first sealing block 72 to move to one side of the valve mouth portion 210 and seal it with the valve mouth portion 210. Both sealing structures reach a sealed state, and the gas proportional valve is in a closed state.

[0048] Two sealing structures are arranged between the electromagnetic drive device 100 and the valve mouth portion 210. When power is on, the two sealing structures are opened at the same time, and the gas proportional valve is in an open state. When power is off, the two sealing structures are reset and sealed at the same time, and the gas proportional valve is closed. In this way, the arrangement of the proportional adjustment device 300 can be simplified and safety performance can be guaranteed.

[0049] like Figure 5As shown, the outer wall of the first moving iron core 12 is provided with a limiting groove 16 along the circumferential direction, and the extension tube 9 is bent inwardly along the radial direction to form a bending portion 91, and the bending portion 91 is fixedly connected or limitedly connected to the limiting groove 16. For example, the bending portion 91 is located in the limiting groove 16 and abuts against the groove wall of the limiting groove 16 to realize the connection between the first moving iron core 12 and the extension tube 9, ensuring that the two can move synchronously along the axial direction of the sleeve 3.

[0050] Specifically, the limiting groove 16 can be an annular structure continuously arranged along the circumference of the first moving iron core 12. In this case, the bending portion 91 of the extension tube 9 can be continuous or arranged at intervals; or, the limiting groove 16 can also be a plurality of groove structures arranged at intervals along the circumference of the first moving iron core 12. In this case, the bending portion 91 of the extension tube 9 is also arranged at intervals.

[0051] like Figure 5 As shown, a seal is provided along the circumferential direction between the outer wall of the first moving iron core 12 and the inner wall of the extension tube 9 to ensure a sealed connection between the two. Specifically, an annular sealing groove is provided along the circumferential direction on the outer wall of the first moving iron core 12, and the seal is located in the annular sealing groove. Such a configuration can simplify the overall structure.

[0052] The first sealing block 72 includes a sealing top wall 74 and a sealing side wall 75, wherein the sealing side wall 75 is arranged to protrude along the circumference of the sealing top wall 74, and encloses a receiving space 76 on the side of the sealing top wall 74 facing the valve seat 200, and the receiving space 76 is used to receive the second sealing block 73, and the depth of the receiving space 76 is not less than the thickness of the second sealing block 73, that is, when the second sealing block 73 is located in the receiving space 76, it will not abut against the sealing top wall 74, so that the first sealing block 72 and the second sealing block 73 can respectively block the valve port 210. The sealing top wall 74 is provided with a through hole 741, and the connecting end 11 of the second moving iron core 13 can pass through the through hole 741 and connect to the first sealing block 72, and at the same time, the end of the extension tube 9 can be sealed and connected to the sealing top wall 74 along the circumference of the through hole 741, so as to avoid the leakage of gas along the through hole 741.

[0053] Specifically, the end of the extension tube 9 is provided with a flange 92 radially outward, and the flange 92 is embedded in the inner peripheral wall of the through hole portion 741, so as to achieve a sealed connection between the extension tube 9 and the sealing top wall 74, which can simplify the overall structure.

[0054] The above are only preferred implementations of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. An electromagnetic drive device, characterized in that: It includes a moving core component, a sleeve, a magnetic conductive component and a sealing component. The moving core component and the sleeve are slidably matched. The magnetic conductive component is an integral stretch-formed structure. The magnetic conductive component includes a main body and a boss portion protruding from the main body toward the moving core component. The moving core component can approach or move away from the boss portion. The sleeve is provided with a locking convex portion facing the boss portion, and the boss portion is provided with a locking portion. The locking convex portion and the locking portion limit the seal, one side of the seal is sealed with the sleeve portion, and the other side of the seal is sealed with the boss portion.

2. An electromagnetic drive device according to claim 1, characterized in that: The boss portion further includes a positioning portion and a frustum portion, the locking portion is located between the positioning portion and the frustum portion, and along the axial direction of the frustum portion, the cross section of the locking portion gradually shrinks from the positioning portion, and the cross section of the frustum portion gradually shrinks from the locking portion.

3. An electromagnetic drive device according to claim 2, characterized in that: The sleeve includes a sleeve end, and the electromagnetic drive device also includes a frame. The frame and the positioning portion limit the sleeve end. One side surface of the sleeve end abuts against the frame, and the other side surface of the sleeve end abuts against the positioning portion.

4. The electromagnetic drive device according to claim 2, characterized in that: The sealing member is sleeved on the outer periphery of the locking portion, the sealing member abuts against the outer wall of the locking portion, and the sealing member abuts against the inner wall of the sleeve located on the side of the locking protrusion facing the main body.

5. The electromagnetic drive device according to claim 2, characterized in that: The electromagnetic drive device is provided with a receiving groove, the inner wall of the part of the sleeve located on the side of the convex part facing the main body constitutes a part of the groove wall of the receiving groove, and the outer wall of the locking part constitutes at least another part of the groove wall of the receiving groove.

6. The electromagnetic drive device according to claim 2, characterized in that: One end of the moving core component facing the magnetic conductive component is provided with a conical groove matched with the frustum portion, and the moving core component is provided with a buffer component, and the buffer component can abut against the end surface of the frustum portion.

7. An electromagnetic drive device according to any one of claims 1 to 6, characterized in that: The electromagnetic drive device also includes an extension tube, and the moving core component includes a first moving iron core and a second moving iron core. The first moving iron core is partially located in the sleeve, and the first moving iron core is connected to the extension tube. The second moving iron core is located in the extension tube and is provided with a connecting end. A second spring is provided between the first moving iron core and the second moving iron core. In a power-off state, the gap between the first moving iron core and the second moving iron core is smaller than the gap between the second moving iron core and the magnetic conductive component.

8. The electromagnetic drive device according to claim 7, characterized in that: The outer wall of the first moving iron core is provided with a limiting groove along the circumferential direction, and the extension tube is provided with a bending section bent inwardly along the radial direction, and the bending end is fixedly connected or limitedly connected to the limiting groove.

9. The electromagnetic drive device according to claim 8, characterized in that: The electromagnetic drive device includes a first sealing block and a second sealing block, the first sealing block includes a sealing top wall and a sealing side wall, the sealing side wall protrudes from the sealing top wall, the first sealing block is provided with an accommodating space capable of accommodating the second sealing block, the sealing top wall is provided with a through hole portion, the connecting end can pass through the through hole portion and be connected to the first sealing block, and the end of the extension tube is fixedly connected or limit-connected to the sealing top wall.

10. A gas proportional valve, characterized in that: It comprises a valve seat, a proportional adjustment device and an electromagnetic drive device as described in any one of claims 1 to 9.

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