Diaphragm structure and electromagnetic diaphragm valve

Abstract

A diaphragm structure and an electromagnetic diaphragm valve relate to the technical field of diaphragm valves, the diaphragm structure comprises a ceramic push rod and diaphragms which are arranged in a valve body, the ceramic push rod is of a regular polygon prism structure, and the diaphragms are arranged at two ends of the ceramic push rod. The deformation resistance of the ejector rod is improved by adopting the ceramic ejector rod, and the peripheral support of the ejector rod is increased by adopting the regular polygon prism structure, so that the problem that the middle part of the existing ejector rod is easy to bend and deform under fluid impact due to complete dependence on two-end support is solved; therefore, the problem of flow attenuation caused by length reduction due to deformation of the ejector rod is solved.

Description

Technical Field

[0001] The utility model relates to the field of diaphragm valves, in particular to a diaphragm structure that can avoid flow attenuation. Background Art

[0002] The electromagnetic diaphragm valve is a common type of diaphragm valve, which mainly includes a valve body, a valve cover, a valve core (with a diaphragm), a spring, an electromagnetic valve and other structures. The electromagnetic diaphragm valve drives the movement of the valve core through electromagnetic force to realize the on-off or flow control of the fluid. The diaphragm structure adopted by the existing valve core is of an upper and lower channel type. By controlling the up and down movement of the diaphragm structure, the opening and closing of the upper channel and the lower channel are controlled, so as to control the flow rate and flow direction of the fluid.

[0003] However, since the ejector rod in the diaphragm structure is usually made of a polymer material, during the long-term working process, the diaphragm structure is deformed under the influence of pressure and temperature. Especially after the deformation of the ejector rod, the straight length becomes shorter. This will not only affect the service life of the valve, but also lead to the narrowing of the flow outlet due to the shortening of the ejector rod length, resulting in the problem of flow attenuation, and then affecting the flow control ability and the decline of work efficiency.

[0004] Therefore, in view of the above defects, it is necessary to optimize the existing diaphragm structure to extend the service life of the diaphragm structure. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a diaphragm structure and an electromagnetic diaphragm valve. The diaphragm structure adopts a prismatic ceramic ejector rod, and the side edges of the ceramic ejector rod abut against the inner side wall to enhance the anti-deformation ability of the ceramic ejector rod under the impact of the fluid, so as to extend the service life and avoid the problem of flow attenuation caused by the reduction of the flow area due to the deformation of the ejector rod.

[0006] To achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A diaphragm structure includes a ceramic ejector rod and a diaphragm disposed in the valve body. The ceramic ejector rod is a regular polygon prism structure, and the diaphragms are disposed at both ends of the ceramic ejector rod. By adopting a ceramic ejector rod to improve the anti-deformation ability of the ejector rod itself, and adopting a regular polygon prism structure to increase the circumferential support for the ejector rod, the problem that the existing ejector rod depends entirely on the support at both ends and is prone to bending deformation in the middle under the impact of the fluid is avoided, so as to solve the problem of flow attenuation caused by the shortening of the length due to the deformation of the ejector rod.

[0008] Further, the side edges of the ceramic ejector rod adopt a fillet structure; the fillet structure avoids sharp collision between the ceramic ejector rod and the valve body, improves the durability of the ceramic ejector rod, and at the same time improves the smoothness of the fluid passing through the fillet structure;

[0009] Further, the diaphragm includes a sealing sheet and a plugging head protruding from the sealing sheet, and the plugging head is fixedly connected to the end of the ceramic ejector rod.

[0010] An electromagnetic diaphragm valve includes a valve body and the diaphragm structure. A distribution flow channel and the diaphragm structure are arranged in the valve body. The fluid inlet of the distribution flow channel communicates with an input flow channel. The two ends of the distribution flow channel are respectively fluid outlets. One fluid outlet communicates with a first flow chamber, the first flow chamber communicates with a first output flow channel, the other fluid outlet communicates with a second flow chamber, and the second flow chamber communicates with a second output flow channel. The ceramic ejector rod is arranged in the distribution flow channel, and the side edge of the ceramic ejector rod is close to the inner wall of the distribution flow channel. The diaphragm is hermetically arranged in the first flow chamber and the second flow chamber, and when the plugging head on the diaphragm abuts against one end of the distribution flow channel, it can completely seal and cover the fluid outlet of the distribution flow channel; the side edge of the ceramic ejector rod is close to but does not completely abut against the inner wall of the distribution flow channel, which can ensure that there is a gap for circulation between the side edge and the inner wall, facilitating the fluid to uniformly fill the entire distribution flow channel. When subjected to fluid impact, it can timely abut against the inner wall of the distribution flow channel by means of the side edge, and utilize the support of the inner wall on the ceramic ejector rod to prevent the ceramic ejector rod from being deformed due to excessive force.

[0011] An electromagnetic diaphragm valve includes a valve body and the diaphragm structure. A distribution flow channel and the diaphragm structure are arranged in the valve body. The fluid inlet of the distribution flow channel communicates with an input flow channel. The two ends of the distribution flow channel are respectively fluid outlets. One fluid outlet communicates with a first flow chamber, the first flow chamber communicates with a first output flow channel, the other fluid outlet communicates with a second flow chamber, and the second flow chamber communicates with a second output flow channel. The ceramic ejector rod is arranged in the distribution flow channel, and a part of the side edge of the ceramic ejector rod abuts against the inner wall of the distribution flow channel. The diaphragm is hermetically arranged in the first flow chamber and the second flow chamber, and when the plugging head on the diaphragm abuts against one end of the distribution flow channel, it can completely seal and cover the fluid outlet of the distribution flow channel; a part of the side edge of the ceramic ejector rod abuts against the inner wall of the distribution flow channel, which can ensure that the inner wall of the distribution flow channel always provides circumferential support for the ceramic ejector rod and does not affect the fluid from flowing into the entire distribution flow channel fully and uniformly;

[0012] Further, there is at least one chamfered position at each side edge of the ceramic ejector rod; the setting of the chamfered position on the ceramic ejector rod can ensure that there is a gap for circulation between a part of the side edge of the ceramic ejector rod and the inner wall, facilitating the fluid to uniformly fill the entire distribution flow channel;

[0013] Further, at least one concave structure is arranged on the inner wall of the distribution flow channel corresponding to each side edge of the ceramic ejector rod; by concavely arranging the inner wall of the distribution flow channel, it is ensured that there is a gap for circulation between a part of the inner wall of the distribution flow channel and the side edge, facilitating the fluid to uniformly fill the entire distribution flow channel.

[0014] The beneficial effects of the present utility model are as follows:

[0015] 1) Optimize the diaphragm structure, adopt a ceramic ejector rod with a regular polygon prism structure. While improving the anti-deformation ability of the ejector rod itself, use the regular polygon prism structure to increase the circumferential support for the ejector rod, avoiding the problem that the existing ejector rod completely relies on the fixed support of the two end diaphragms for the ejector rod, resulting in the middle of the ejector rod being easily bent and deformed under fluid impact. Thus, solve the problem that the length becomes shorter due to the deformation of the ejector rod, and then cause the flow rate to decay. Further, the side edges of the ceramic ejector rod adopt a chamfered structure, which improves the durability of the ceramic ejector rod and the smoothness of the fluid passing through the chamfered structure;

[0016] 2) Set a ceramic ejector rod in the distribution flow channel, and the side edges of the ceramic ejector rod are close to the inner wall of the distribution flow channel. The side edges of the ceramic ejector rod are close to but do not completely abut against the inner wall of the distribution flow channel, which can ensure that there is a gap for circulation between the side edges and the inner wall, facilitating the fluid to evenly fill the entire distribution flow channel. When being impacted by the fluid, it can timely rely on the side edges to abut against the inner wall of the distribution flow channel, and use the support of the inner wall for the ceramic ejector rod to avoid the ceramic ejector rod being deformed due to excessive force;

[0017] 3) Set a ceramic ejector rod in the distribution flow channel, and part of the side edges of the ceramic ejector rod abut against the inner wall of the distribution flow channel. The so-called abutment includes two situations. One is to set a chamfer position at each side edge of the ceramic ejector rod, that is, optimize the side edges of the ceramic ejector rod so that there is a gap for circulation between the upper part of the side edges and the inner wall. The other is to set a concave structure on the inner wall of the distribution flow channel corresponding to each side edge of the ceramic ejector rod, that is, optimize the inner wall of the distribution flow channel to make there be a gap for circulation between part of the inner wall of the distribution flow channel and the side edges. In this way, it can not only ensure that the inner wall of the distribution flow channel always provides circumferential support for the ceramic ejector rod, but also does not affect the fluid from flowing into the entire distribution flow channel fully and evenly. Description of the Drawings

[0018] Figure 1 is a cross-sectional view of the electromagnetic diaphragm valve according to an embodiment of the present utility model in its axial direction;

[0019] Figure 2 is Figure 1 an enlarged schematic view of part A in

[0020] Figure 3 is a cross-sectional view of the side edge of the ceramic ejector rod according to Embodiment 1 of the present utility model close to the inner wall of the distribution flow channel;

[0021] Figure 4 is a cross-sectional view of the side edge of the ceramic ejector rod according to Embodiment 2 of the present utility model partially abutting against the inner wall of the distribution flow channel;

[0022] Figure 5 It is a schematic cross-sectional view showing that the side edge part of the ceramic ejector rod abuts against the inner wall of the distribution channel in the third embodiment of the present utility model;

[0023] In the figure:

[0024] 1. Valve body; 11. Distribution channel; 12. First flow cavity; 13. Second flow cavity; 14. Inner wall; 15. Concave structure;

[0025] 2. Ceramic ejector rod; 21. Rounded corner structure; 22. Chamfered position;

[0026] 3. Diaphragm; 31. Sealing piece; 32. Plugging head. Specific implementation manner

[0027] In the description of the present utility model, it should be understood that the terms indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation.

[0028] The principles and features of the present utility model will be described below with reference to the drawings. The examples given are only for explaining the present utility model and are not intended to limit the scope of the present utility model. It should be noted that the drawings are all in a very simplified form and use non-precise scales, and are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the present utility model.

[0029] As Figure 1 and 2 shown, in an embodiment of the present utility model, an electromagnetic diaphragm valve includes a valve body 1 and a diaphragm structure. A distribution channel 11 and a diaphragm structure are arranged in the valve body 1. The fluid inlet of the distribution channel 11 is communicated with the input channel, and both ends of the distribution channel 11 are fluid outlets. One fluid outlet is communicated with the first flow cavity 12, the first flow cavity 12 is communicated with the first output channel, the other fluid outlet is communicated with the second flow cavity 13, and the second flow cavity 13 is communicated with the second output channel. The diaphragm structure includes a ceramic ejector rod 2 and a diaphragm 3. The ceramic ejector rod 2 is a regular polygon prism structure, and the side edges of the ceramic ejector rod 2 adopt a rounded corner structure 21. Diaphragms 3 are arranged at both ends of the ceramic ejector rod 2. The diaphragm 3 includes a sealing piece 31 and a plugging head 32 protruding from the sealing piece 31. The plugging head 32 is fixedly connected to the end of the ceramic ejector rod 2. The ceramic ejector rod 2 is inserted through the distribution channel 11, and the diaphragm 3 is hermetically arranged in the first flow cavity 12 and the second flow cavity 13. When the plugging head 32 on the diaphragm 3 abuts against one end of the distribution channel 11, it can completely seal and cover the fluid outlet of the distribution channel 11. In this embodiment, for the sake of simplicity of description, the ceramic ejector rod 2 is a square prism structure, and the end of the ceramic ejector rod 2 is fixedly embedded in the center of the plugging head 32.

[0030] It should be noted that only the structures related to the current structural optimization are described herein. The structure of the electromagnetic diaphragm valve is not limited to the above structures. For example, the diaphragm structure is a part of the spool structure. The spool also includes an electromagnetic driving device and an elastic restoring element that act on both ends of the diaphragm structure respectively. When energized, the electromagnetic driving device overcomes the elastic force of the elastic restoring element and pushes the diaphragm structure towards the restoring element, causing the diaphragm 3 near the electromagnetic driving device to block the distribution flow channel 11, and the end of the distribution flow channel 11 near the elastic restoring element is opened. After power-off, the electromagnetic driving device loses its acting force, and under the action of the elastic force of the elastic restoring element, the diaphragm 3 near the elastic restoring element blocks the distribution flow channel 11, and the end of the distribution flow channel 11 near the electromagnetic driving device is opened, realizing the switching of the fluid flow direction. In addition, it also includes structures such as valve covers, that is, it includes various components applicable to this structure in the prior art, which will not be listed one by one in this embodiment.

[0031] Embodiment 1

[0032] As Figure 3 shown is a cross-section perpendicular to the length direction of the ceramic ejector rod 2. The side edge of the ceramic ejector rod 2 is close to the inner wall 14 of the distribution flow channel 11, which is understood as: the side edge of the ceramic ejector rod 2 is close to but does not completely abut against the inner wall 14 of the distribution flow channel 11, so as to ensure that there is a gap for fluid flow between the side edge and the inner wall 14, facilitating the fluid to uniformly fill the entire distribution flow channel 11. When being impacted by the fluid, it can timely abut against the inner wall 14 of the distribution flow channel 11 by means of the side edge, and utilize the support of the inner wall 14 on the ceramic ejector rod 2 to prevent the ceramic ejector rod 2 from being deformed due to excessive force.

[0033] Embodiment 2

[0034] As Figure 4 shown is a cross-section perpendicular to the length direction of the ceramic ejector rod 2. The side edge of the ceramic ejector rod 2 partially abuts against the inner wall 14 of the distribution flow channel 11. To achieve this purpose, the method adopted in this embodiment is: there is at least one chamfer position 22 at each side edge of the ceramic ejector rod 2. By chamfering the side edge of the ceramic ejector rod 2, it is ensured that the chamfer position 22 is not sufficient to abut against the inner wall 14, so as to ensure that there is a gap for fluid flow between some side edges of the ceramic ejector rod 2 and the inner wall 14. It should be noted that only the chamfer position 22 needs to be ensured for each side edge, rather than chamfering the entire side edge. The chamfer positions 22 on each side edge can be in the same ring or not in the same ring. The setting of the concave structure 15 in the following text is the same. Figure 4 Taking the former as an example and showing the cross-sectional view of the position where the chamfer position 22 is located. Preferably, in order to improve the smoothness of the flow, after chamfering, the side edge of this section still presents a rounded chamfer structure 21. Of course, other shapes of chamfers that can meet the above purposes are also acceptable.

[0035] Embodiment III

[0036] As Figure 5 shown is a cross-section perpendicular to the length direction of the ceramic ejector rod 2. The side edge portion of the ceramic ejector rod 2 abuts against the inner wall 14 of the distribution runner 11. To achieve this purpose, the method adopted in this embodiment is: at least one concave structure 15 is provided on the inner wall 14 of the distribution runner 11 corresponding to each side edge of the ceramic ejector rod 2, so as to ensure that there is a gap for fluid flow between a part of the side edges of the ceramic ejector rod 2 and the inner wall 14. Similarly, the shape of the concave structure 15 is not limited as long as it can meet the purpose of fluid flow.

[0037] In the foregoing embodiments, a regular polygon prism structure can be adopted to increase the circumferential support of the ejector rod while improving the anti-deformation ability of the ejector rod itself, avoiding the problem that the existing ejector rod is prone to bending deformation in the middle under fluid impact due to completely relying on the fixed support of the two end diaphragms 3 for the ejector rod, and then avoiding the problem of flow rate attenuation caused by the reduction of the flow area due to the deformation of the ejector rod.

[0038] In addition, it should be understood that although this specification is described according to embodiments, not each embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A diaphragm structure, characterized in that: It includes a ceramic push rod and a diaphragm arranged in the valve body. The ceramic push rod is a regular polygonal prism structure. The ceramic push rod is arranged in the valve body in a way that its side edges are close to or partially against the inner wall of the valve body. The diaphragms are arranged at both ends of the ceramic push rod.

2. The diaphragm structure according to claim 1, characterized in that: The side edges of the ceramic ejector pin adopt a rounded structure.

3. The diaphragm structure according to claim 1, characterized in that: The diaphragm comprises a sealing sheet and a plugging head protruding from the sealing sheet, and the plugging head is fixedly connected to the end of the ceramic ejector rod.

4. An electromagnetic diaphragm valve, characterized in that: It includes a valve body and a diaphragm structure as described in any one of claims 1 to 3, a distribution channel and a diaphragm structure are arranged in the valve body, the fluid inlet of the distribution channel is connected to the input channel, the two ends of the distribution channel are respectively fluid outlets, one fluid outlet is connected to a first flow cavity, the first flow cavity is connected to a first output flow channel, the other fluid outlet is connected to a second flow cavity, the second flow cavity is connected to a second output flow channel, the ceramic push rod is arranged in the distribution channel, and the side edge of the ceramic push rod is close to the inner wall of the distribution channel, the diaphragm is sealed in the first flow cavity and the second flow cavity, and the sealing head on the diaphragm can completely seal and cover the fluid outlet of the distribution channel when it abuts against one end of the distribution channel.

5. An electromagnetic diaphragm valve, characterized in that: It includes a valve body and a diaphragm structure as described in any one of claims 1 to 3, a distribution channel and a diaphragm structure are arranged in the valve body, the fluid inlet of the distribution channel is connected to the input channel, the two ends of the distribution channel are respectively fluid outlets, one fluid outlet is connected to a first flow cavity, the first flow cavity is connected to a first output flow channel, the other fluid outlet is connected to a second flow cavity, the second flow cavity is connected to a second output flow channel, the ceramic push rod is arranged in the distribution channel, the side edge of the ceramic push rod abuts against the inner wall of the distribution channel, the diaphragm is sealed in the first flow cavity and the second flow cavity, and the sealing head on the diaphragm can completely seal and cover the fluid outlet of the distribution channel when it abuts against one end of the distribution channel.

6. The electromagnetic diaphragm valve according to claim 5, characterized in that: There is at least one chamfered position at each side edge of the ceramic push rod.

7. The electromagnetic diaphragm valve according to claim 5, characterized in that: At least one concave structure is arranged on the inner wall of the distribution channel corresponding to the position of each side edge on the ceramic push rod.

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