A moving magnet type gas proportional valve

Abstract

The utility model discloses a kind of moving magnet type gas proportional valves, comprising: valve body, the valve body has valve cavity and the valve port being communicated with the valve cavity, the valve plug assembly is equipped in the valve cavity, the valve plug assembly is blocked with the valve port cooperation;The valve plug assembly has flow guide surface and sealing surface, the sealing surface is blocked with the valve port cooperation, the orientation of the flow guide surface deviates the sealing surface and the blocking of the valve port.This utility model cancels rubber part, the sealing surface of valve plug is directly contacted with valve port, and setting guide surface guides airflow, reduces turbulence at valve port, improves product stability.

Description

Technical Field

[0001] This utility model relates to the technical field of gas proportional valves, and in particular to a moving magnet type gas proportional valve. Background Technology

[0002] In the current technology, after the moving iron core type gas proportional valve is assembled, due to the attraction between the magnet and the metal part at the bottom and the downward force of the spring, the rubber part on the valve plug is in contact with the valve port for a long time. The rubber part is prone to deformation, and the opening area changes, which in turn leads to changes in gas flow, resulting in unstable water temperature and failure to ignite the water heater. Utility Model Content

[0003] To address the aforementioned issue of varying opening areas in existing gas proportional valves, this paper aims to provide a moving magnet type gas proportional valve that eliminates rubber components. The valve plug's sealing surface directly contacts the valve port, and a guide surface is provided to direct the airflow, reducing turbulence at the valve port and improving product stability.

[0004] The specific technical solution is as follows:

[0005] A moving magnet type gas proportional valve includes: a valve body, the valve body having a valve cavity and a valve port communicating with the valve cavity, a valve plug assembly being provided in the valve cavity, the valve plug assembly being sealed and cooperated with the valve port;

[0006] The valve plug assembly has a flow guiding surface and a sealing surface. The sealing surface is engaged with the valve port to seal it. The direction of the flow guiding surface is offset from the sealing surface and the sealing point of the valve port.

[0007] In the aforementioned moving magnet type gas proportional valve, the guide surface and the sealing surface are distributed sequentially from the center of the valve plug assembly to the outside.

[0008] In the aforementioned moving magnet type gas proportional valve, the cross-section of the guide surface is an inclined straight edge; and the cross-section of the sealing surface is an arc edge.

[0009] In the aforementioned moving magnet type gas proportional valve, the valve body has a valve wall, the valve port is located on the valve wall, and the flow guiding surface faces the inner side of the valve wall.

[0010] The aforementioned moving magnet type gas proportional valve, wherein the valve plug assembly includes: a valve plug, a valve stem, and a balancing diaphragm, one end of the valve plug having the guide surface and the sealing surface, and the sealing surface sealingly engaging with the valve port, one end of the valve stem being mounted on the other end of the valve plug, the inner circumference of the balancing diaphragm being sleeved on the valve stem, and the outer circumference of the balancing diaphragm being mounted on the valve body.

[0011] In the aforementioned moving magnet type gas proportional valve, the valve plug is made of plastic.

[0012] In the aforementioned moving magnet type gas proportional valve, one end of the valve plug is provided with an elastic element, which uses its own elastic force to make the sealing surface on the valve plug seal and cooperate with the valve port.

[0013] In the aforementioned moving magnet type gas proportional valve, one end of the valve plug is provided with a groove, and one end of the elastic element abuts against the groove.

[0014] In the aforementioned moving magnet type gas proportional valve, one end of the valve plug has a hollow structure, and the interior of the valve plug is provided with multiple reinforcing ribs distributed along its circumference.

[0015] The aforementioned moving magnet type gas proportional valve further includes a valve plug assembly comprising a magnet and a valve seat, wherein the magnet and the valve seat are both mounted on the other end of the valve stem and are respectively clamped on both sides of the inner periphery of the balance diaphragm.

[0016] The positive effects of the above technical solution compared with the existing technology are:

[0017] This invention eliminates the rubber component, allowing the sealing surface of the valve plug to directly contact the valve port, and provides a guide surface to direct the airflow, thereby reducing turbulence at the valve port and improving product stability.

[0018] The valve plug of this invention is made of plastic material, which is not easily deformed.

[0019] The valve plug of this invention has internal reinforcing ribs to improve its strength and prevent deformation during processing. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of a moving magnet type gas proportional valve according to this utility model;

[0021] Figure 2 This utility model relates to a moving magnet type gas proportional valve. Figure 1 A magnified view of a portion of the image;

[0022] Figure 3 This is a schematic diagram of the valve plug assembly in a moving magnet type gas proportional valve according to this utility model;

[0023] Figure 4 This is a top view of the valve plug assembly in a moving magnet type gas proportional valve according to this utility model;

[0024] In the attached drawings: 1. Valve body; 2. Valve cavity; 3. Valve port; 4. Valve plug assembly; 5. Guide surface; 6. Sealing surface; 7. Valve wall; 8. Valve plug; 9. Valve stem; 10. Balancing diaphragm; 11. Elastic element; 12. Groove; 13. Protrusion; 14. Reinforcing rib; 15. Support column; 16. Magnet; 17. Valve seat; 18. Support part; 19. Sealing part. Detailed Implementation

[0025] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but this is not intended to limit the present invention.

[0026] like Figures 1 to 4 As shown, a preferred embodiment of a moving magnet type gas proportional valve is illustrated, comprising: a valve body 1, a valve cavity 2 and a valve port 3 communicating with the valve cavity 2, a valve plug assembly 4 provided in the valve cavity 2, and the valve plug assembly 4 sealingly engaging with the valve port 3.

[0027] The valve plug assembly 4 has a flow guiding surface 5 and a sealing surface 6. The sealing surface 6 is sealed and cooperates with the valve port 3. The direction of the flow guiding surface 5 is offset from the sealing surface 6 and the sealing point of the valve port 3.

[0028] This invention eliminates the rubber component, and the sealing surface 6 of the valve plug assembly 4 directly contacts the valve port 3, and a guide surface 5 is provided to guide the airflow, thereby reducing turbulence at the valve port 3 and improving product stability.

[0029] Among them, the guiding direction of guide surface 5 is Figure 2 Arrow A is shown in the image.

[0030] Furthermore, as a preferred embodiment, the guide surface 5 and the sealing surface 6 are distributed sequentially from the center of the valve plug assembly 4 to the outside.

[0031] Furthermore, as a preferred embodiment, the cross-section of the guide surface 5 is an inclined straight edge; the cross-section of the sealing surface 6 is an arc edge. In addition, the arc edge provides a better sealing effect with the valve port 3.

[0032] Furthermore, as a preferred embodiment, the valve body 1 has a valve wall 7, the valve port 3 is disposed on the valve wall 7, and the flow guiding surface 5 faces the inner side of the valve wall 7.

[0033] When the airflow passes through the valve cavity 2, it will be guided by the guide surface 5, so that the airflow will not directly impact the sealing surface 6 and the sealing point of the valve port 3. Instead, it will deviate and impact the inner side of the valve wall 7, thereby reducing the turbulence at the valve port 3, improving the airflow stability at the valve port 3, and improving the product stability.

[0034] The above are merely preferred embodiments of the present utility model and are not intended to limit the implementation methods and protection scope of the present utility model.

[0035] Based on the above, this utility model also has the following embodiments:

[0036] For further embodiments of this utility model, please refer to... Figures 1 to 4 As shown, the valve plug assembly 4 includes: a valve plug 8, a valve stem 9, and a balancing diaphragm 10. One end of the valve plug 8 has a guide surface 5 and a sealing surface 6, and the valve plug 8 moves axially to make the sealing surface 6 seal and cooperate with the valve port 3. One end of the valve stem 9 is installed on the other end of the valve plug 8. The inner circumference of the balancing diaphragm 10 is sleeved on the valve stem 9, and the outer circumference of the balancing diaphragm 10 is installed on the valve body 1.

[0037] In a further embodiment of this utility model, the valve plug 8 is made of plastic material, which is not easily deformed and improves product stability.

[0038] In a further embodiment of this utility model, one end of the valve plug 8 is provided with an elastic element 11. The elastic element 11 uses its own elastic force to make the sealing surface 6 on the valve plug 8 seal and cooperate with the valve port 3.

[0039] In a further embodiment of the present invention, one end of the valve plug 8 is provided with a groove 12, and one end of the elastic member 11 abuts against the groove 12.

[0040] In a further embodiment of the present invention, the valve body 1 is provided with a protrusion 13 inward, and the other end of the elastic element 11 is sleeved on the protrusion 13; the protrusion 13 and the groove 12 have the function of guiding and preventing deviation of the elastic element 11, and the elastic element 11 is a spring.

[0041] In a further embodiment of the present invention, the center of one end of the valve plug 8 is a hollow structure, and the interior of the valve plug 8 is provided with a plurality of reinforcing ribs 14 distributed along its circumference.

[0042] Preferably, the bottom surface inside the valve plug 8 has a support column 15, and the support column 15 is connected to the periphery inside the valve plug 8 by a reinforcing rib 14, which is evenly distributed along the circumferential direction of the support column 15.

[0043] The valve plug 8 of this invention is provided with a reinforcing rib 14 inside, which improves the strength of the valve plug 8 and also prevents the valve plug 8 from deforming during processing.

[0044] In a further embodiment of this utility model, the valve plug assembly 4 further includes a magnet 16 and a valve seat 17. Both the magnet 16 and the valve seat 17 are mounted on the other end of the valve stem 9 and are respectively clamped to both sides of the inner circumference of the balance diaphragm 10. The magnet 16 is used to cooperate with the electromagnetic drive mechanism of the proportional valve, which is a conventional structure of the proportional valve (not shown in the figure).

[0045] In a further embodiment of the present invention, the valve plug 8 includes a support portion 18 and a sealing portion 19 connected to each other, with the sealing portion 19 disposed on the outer periphery of one end of the support portion 18.

[0046] In a further embodiment of the present invention, the sealing part 19 has a guide surface 5 and a sealing surface 6 connected to each other. The guide surface 5 extends to the outside of the support part 18, and the sealing surface 6 extends to the outside of the sealing part 19.

[0047] In a further embodiment of the present invention, a groove 12 is formed between the outer periphery of one end of the support portion 18 and the sealing portion 19, into which one end of the elastic member 11 extends.

[0048] In a further embodiment of this utility model, the support part 18 and the sealing part 19 are an integral structure.

[0049] The above description is only a preferred embodiment of the present utility model and does not limit the implementation method and protection scope of the present utility model. Those skilled in the art should realize that all solutions obtained by equivalent substitutions and obvious changes made based on the description and illustrations of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A moving magnet type gas proportional valve, characterized in that, include: The valve body has a valve cavity and a valve port communicating with the valve cavity. A valve plug assembly is provided in the valve cavity, and the valve plug assembly is in a sealing cooperation with the valve port. The valve plug assembly has a flow guiding surface and a sealing surface. The sealing surface is engaged with the valve port to seal it. The direction of the flow guiding surface is offset from the sealing surface and the sealing point of the valve port.

2. The moving magnet type gas proportional valve according to claim 1, characterized in that, The flow guiding surface and the sealing surface are distributed sequentially from the center of the valve plug assembly to the outside.

3. The moving magnet type gas proportional valve according to claim 1, characterized in that, The cross-section of the guide surface is an inclined straight edge; the cross-section of the sealing surface is an arc edge.

4. The moving magnet type gas proportional valve according to claim 1, characterized in that, The valve body has a valve wall, the valve port is located on the valve wall, and the flow guiding surface faces the inside of the valve wall.

5. The moving magnet type gas proportional valve according to claim 1, characterized in that, The valve plug assembly includes a valve plug, a valve stem, and a balancing diaphragm. One end of the valve plug has the flow guiding surface and the sealing surface, and the valve plug moves axially to make the sealing surface seal against the valve port. One end of the valve stem is mounted on the other end of the valve plug. The inner circumference of the balancing diaphragm is sleeved on the valve stem, and the outer circumference of the balancing diaphragm is mounted on the valve body.

6. The moving magnet type gas proportional valve according to claim 5, characterized in that, The valve plug is made of plastic.

7. The moving magnet type gas proportional valve according to claim 5, characterized in that, One end of the valve plug is provided with an elastic element, which uses its own elastic force to make the sealing surface on the valve plug cooperate with the valve port to seal.

8. The moving magnet type gas proportional valve according to claim 7, characterized in that, One end of the valve plug is provided with a groove, and one end of the elastic element abuts against the groove.

9. The moving magnet type gas proportional valve according to claim 5, characterized in that, The valve plug has a hollow structure at one end, and multiple reinforcing ribs are arranged inside the valve plug along its circumference.

10. The moving magnet type gas proportional valve according to claim 5, characterized in that, The valve plug assembly further includes a magnet and a valve seat, both of which are mounted on the other end of the valve stem and respectively clamped to both sides of the inner periphery of the balancing diaphragm.

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