Sealing element structure of electromagnetic valve

Abstract

The utility model discloses a sealing element structure of an electromagnetic valve, and belongs to the technical field of electromagnetic valves. Comprising a sealing piece body, the outer end face of the sealing piece body is arranged to be a Gothic arc face, and the intersection point of two arcs of the Gothic arc face forms a sharp vault point and is used for being in contact sealing with the inner wall of a valve body; grooves are formed in the two side faces of the sealing piece body in the thickness direction, and when the sealing piece body makes contact with the inner wall of a valve body for sealing in the moving process, the sealing piece body deflects in one direction. And airflow flows into the groove on one side and enables the sealing element body to generate radial expansion deformation so as to compensate for the sealing interference loss caused by abrasion of the Gothic arc surface of the sealing element body. The contact area between the sealing element body and the valve body sealing groove is reduced through the Gothic arc surface, the friction force between the sealing element body and the valve body sealing groove is reduced, the abrasion process of the sealing element body is delayed, the sealing interference loss caused by abrasion can be compensated through an airflow compensation mechanism introduced by the groove design, and the service life of the sealing element body is prolonged.

Description

Technical Field

[0001] This utility model belongs to the field of electromagnetic valve technology, and specifically relates to a sealing structure for an electromagnetic valve. Background Technology

[0002] In existing solenoid valve technology, the main working principle is to drive the valve stem to move through electromagnetic force, thereby achieving connection or switching between the air inlet and different working ports. During this process, there is relative movement between the seal on the valve stem and the inner wall of the valve body, resulting in continuous friction between the seal and the inner wall of the valve body.

[0003] Due to this repeated mechanical friction, the seals will inevitably wear down, which directly affects their service life and sealing performance.

[0004] Current seals often have a short service life due to their rapid wear rate, which not only increases the maintenance cost and frequency of the equipment, but may also cause gas or liquid leakage due to seal failure, affecting the working stability and reliability of the solenoid valve.

[0005] Therefore, improving the wear resistance of seals and extending their service life has become an important challenge in the design and technological improvement of solenoid valves. Utility Model Content

[0006] This utility model addresses the aforementioned problems in the existing technology by proposing a sealing structure for a solenoid valve that extends its service life.

[0007] This utility model can be achieved through the following technical solutions:

[0008] A sealing structure for a solenoid valve, comprising:

[0009] The sealing body has an outer sealing surface that is set as a Gothic arc surface. The Gothic arc surface is formed by the intersection of two non-concentric arcs, and the intersection point of the two arcs forms a pointed arch apex for contact and sealing with the inner wall of the valve body.

[0010] As a further improvement of this utility model, the center distance between the two intersecting arcs of the Gothic arc surface is between 0.05 and 0.15 mm.

[0011] As a further improvement of this utility model, the two outer end faces of the sealing element body along the thickness direction are also provided with protrusions.

[0012] As a further improvement of this utility model, the inner end face of the sealing element body is set as an arc surface and forms an inner sealing arc surface.

[0013] A sealing structure for a solenoid valve is also provided, comprising:

[0014] The sealing body has grooves on its two sides along the thickness direction, and there is a distance between the location of the grooves and the sealing surface at the outer end of the sealing body.

[0015] When the sealing body comes into contact with the inner wall of the valve body during movement, the sealing body is unidirectionally deflected, and the airflow flows into the groove on one side, causing the sealing body to undergo radial expansion deformation to compensate for the loss of sealing interference caused by wear on its outer sealing surface.

[0016] As a further improvement of this utility model, the two grooves can be arranged symmetrically or staggered.

[0017] As a further improvement of this utility model, the sealing element body is provided with protrusions on both sides along the thickness direction.

[0018] As a further improvement of this utility model, the inner end face of the sealing element body is set as an arc surface and forms an inner sealing arc surface.

[0019] As a further improvement of this utility model, the groove is located between the outer end sealing surface of the sealing element body and the protrusion.

[0020] A sealing structure for a solenoid valve is also provided, comprising:

[0021] The sealing body has an outer end face set as a Gothic arc surface, which is formed by the intersection of two non-concentric arcs, and the intersection point of the two arcs forms a pointed arch apex for contact and sealing with the inner wall of the valve body.

[0022] The sealing element body has grooves on two sides along its thickness direction. The grooves are located at a distance from the Gothic arc surface. When the sealing element body contacts and seals with the inner wall of the valve body during movement, the sealing element body is unidirectionally deflected. Airflow flows into the groove on one side and causes the sealing element body to undergo radial expansion deformation to compensate for the loss of sealing interference caused by wear of the Gothic arc surface.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] 1. The Gothic arc surface seals by contacting the valve body sealing groove with the pointed arch apex, which significantly reduces the contact area between the sealing element body and the valve body sealing groove, thereby effectively reducing the friction between the two, greatly delaying the wear process of the sealing element body, and extending its service life.

[0025] 2. The Gothic-style curved surface design ensures that the seal is mainly concentrated at the apex of the pointed arch. This not only guarantees high-efficiency sealing performance, but also automatically adjusts the sealing pressure to a certain extent, avoiding the risk of additional wear or leakage caused by excessive pressure.

[0026] 3. The airflow compensation mechanism introduced by the groove design can automatically adjust the shape of the seal body during the wear process, compensate for the loss of sealing interference caused by wear, and effectively extend the service life of the seal body.

[0027] 4. After the sealing element body is installed, the inner sealing arc surface forms the first sealing line, and the protrusion forms the second sealing line. Through the cooperation of the protrusion and the inner sealing arc surface, a double sealing guarantee is formed to ensure the sealing performance between the valve stem and the first sealing element. Attached Figure Description

[0028] Figure 1 This is a structural schematic diagram of the sealing component of the solenoid valve of this utility model;

[0029] Figure 2 This is a cross-sectional view of the sealing element body of this utility model when applied to a solenoid valve;

[0030] Figure 3 This is the utility model Figure 2 A magnified view of a portion of point A in the middle.

[0031] In the diagram, 100 is the sealing element body; 110 is the Gothic arc surface; 111 is the pointed arch apex; 120 is the groove; 130 is the protrusion; 140 is the inner sealing arc surface; 200 is the valve body sealing groove; and 300 is the valve stem. Detailed Implementation

[0032] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. The technical methods of the present invention will be further described, but the present invention is not limited to these embodiments.

[0033] like Figure 1-3 As shown, this utility model provides a sealing structure for a solenoid valve, comprising:

[0034] The sealing body 100 has an outer sealing surface set as a Gothic arc surface 110, which is formed by the intersection of two non-concentric arcs, and the intersection point of the two arcs forms a pointed arch apex 111 which is used to contact and seal with the inner wall of the valve body sealing groove 200.

[0035] It should be noted that when the solenoid valve is switched, as the valve stem 300 moves, the sealing element body 100 will enter the valve body sealing groove 200 to seal the channel. The sealing element body 100 will rub against the inner wall of the valve body sealing groove 200, gradually wearing down the sealing element body 100.

[0036] To address the aforementioned issues, this embodiment sets the outer sealing surface of the sealing element body 100 as a Gothic arc surface 110, and seals it with the valve body sealing groove 200 through the pointed arch apex 111. At this time, the contact area between the sealing element body 100 and the valve body sealing groove 200 is concentrated only at the pointed arch apex 111. The pointed arch apex 111 can more effectively ensure sealing performance, while the pressure will not be too large. This reduces the frictional force when the sealing element body 100 and the valve body sealing groove 200 slide relative to each other, and extends the service life of the sealing element body 100.

[0037] To further optimize this design, the center-to-center distance between the two intersecting arcs was finely adjusted and set between 0.05 and 0.15 mm. This range was chosen based on a comprehensive consideration of sealing performance, wear resistance, and manufacturing feasibility. It ensures sufficient sealing strength without increasing unnecessary frictional wear due to excessively tight contact, thus achieving the best balance between sealing performance and durability.

[0038] In summary, the design of the Gothic curved surface 110 has at least the following advantages:

[0039] 1. Reduce friction and wear: By sealing the valve body sealing groove 200 with the pointed arch apex 111, the contact area between the sealing element body 100 and the valve body sealing groove 200 is significantly reduced, thereby effectively reducing the friction between the two, greatly delaying the wear process of the sealing element body 100, and extending its service life.

[0040] 2. Improved sealing performance: The design of the Gothic arc surface 110 makes the seal mainly concentrated at the top of the pointed arch 111. This not only ensures efficient sealing performance, but also automatically adjusts the sealing pressure to a certain extent, avoiding the risk of additional wear or leakage caused by excessive pressure.

[0041] 3. Optimize design parameters: By optimizing the center distance of the two intersecting arcs (0.05-0.15mm), sufficient sealing strength is ensured without increasing unnecessary friction loss due to excessive tight contact, thus achieving the best balance between sealing performance and durability.

[0042] Furthermore, in this application, the service life of the sealing element body 100 is extended by creating grooves 120 on both sides along the thickness direction. Specifically:

[0043] There is a distance between the groove 120 and the sealing surface at the outer end of the sealing body 100. When the sealing body 100 contacts and seals with the inner wall of the valve body sealing groove 200 during movement, the sealing body 100 is tilted in one direction. The airflow flows into the groove 120 on one side and causes the sealing body 100 to undergo radial expansion deformation to compensate for the loss of sealing interference caused by wear on its outer end sealing surface.

[0044] For example, such as Figure 3 As shown, when the valve stem 300 moves to the right, the sealing body 100 contacts the valve body sealing groove 200 and forms a seal. Due to the friction between the two contact surfaces, the end of the Gothic arc surface 110 of the sealing body 100 is tilted to the left. At this time, some gas will enter along the gap between the right side of the sealing body 100 and the valve stem 300, and enter the groove 120 located on the right side of the sealing body 100. Under the action of the airflow, it will push the front end of the groove 120 located on the right side of the sealing body 100 to extend outward, so that the sealing body 100 is "stretched", thereby compensating for the worn part of the Gothic arc surface 110 and extending the service life of the sealing body 100.

[0045] In summary, the design of groove 120 has at least the following advantages:

[0046] 1. Automatic wear compensation: The airflow compensation mechanism introduced by the groove 120 design can automatically adjust the shape of the sealing body 100 during the wear process, compensate for the loss of sealing interference caused by wear, and effectively extend the service life of the sealing body 100.

[0047] 2. Improve sealing reliability: The presence of the groove 120 gives the sealing body 100 a certain self-adjustment capability, enabling it to dynamically adjust according to changes in actual working conditions, enhancing the adaptability of the sealing body 100 to different working conditions, and maintaining a good sealing effect during long-term use, reducing the risk of leakage caused by wear.

[0048] 3. Optimize resource utilization: Through the above design, the replacement frequency of the sealing body can be reduced by 100%, maintenance costs can be reduced, and the effective utilization of resources can be achieved.

[0049] It is worth mentioning that the design of the Gothic arc surface 110 extends the service life of the seal body 100 by reducing friction, while the design of the groove 120 extends the service life of the seal by automatically compensating for wear. The combination of the two further significantly improves the service life of the seal body 100 while ensuring good sealing performance.

[0050] Preferably, the two grooves 120 can be arranged symmetrically or staggered. Whether they are arranged symmetrically or staggered, they can achieve automatic compensation for wear of the sealing ring body. The choice of which configuration depends on the specific application scenario, expected working conditions and design goals.

[0051] Preferably, the two outer end faces of the sealing element body 100 along the thickness direction are also provided with protrusions 130. The protrusions 130 can increase the friction or contact area between the sealing element and the valve stem 300, thereby ensuring the stability of the sealing element after installation, and also ensuring the sealing performance between the sealing element body 100 and the valve stem 300.

[0052] Preferably, the inner end face of the sealing element body 100 is arc-shaped and forms an inner sealing arc surface 140. The design of the inner sealing arc surface 140 is also to improve the sealing performance between the sealing element body 100 and the valve stem 300.

[0053] It should be noted that after the sealing body 100 is installed, the inner sealing arc surface 140 forms the first sealing line, and the protrusion 130 forms the second sealing line. Through the cooperation of the protrusion 130 and the inner sealing arc surface 140, a double sealing guarantee is formed to ensure the sealing performance between the valve stem 300 and the first sealing element.

[0054] Preferably, the groove 120 is located between the outer sealing surface of the sealing body 100 and the protrusion 130, that is, the position of the groove 120 is closer to the Gothic arc surface 110, which can effectively utilize the airflow effect for dynamic compensation.

[0055] The technical means disclosed in this utility model are not limited to those described above, but also include technical solutions composed of any combination of the above technical features. The above are specific embodiments of this utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications are also considered within the scope of protection of this utility model.

[0056] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0057] Furthermore, in this utility model, descriptions involving "", "a", "one", etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "" or "a" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0058] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0059] Furthermore, the technical solutions of the various embodiments of this utility model can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

Claims

1. A sealing structure for a solenoid valve, characterized in that, include: The sealing body has an outer sealing surface that is set as a Gothic arc surface. The Gothic arc surface is formed by the intersection of two non-concentric arcs, and the intersection point of the two arcs forms a pointed arch apex for contact and sealing with the inner wall of the valve body.

2. The sealing structure of a solenoid valve according to claim 1, characterized in that, The distance between the centers of the two intersecting arcs of the Gothic arc surface is between 0.05 and 0.15 mm.

3. The sealing structure of a solenoid valve according to claim 1, characterized in that, The sealing element body also has protrusions on its two outer end faces along the thickness direction.

4. The sealing structure of a solenoid valve according to claim 1, characterized in that, The inner end face of the sealing element body is arc-shaped and forms an inner sealing arc surface.

5. A sealing structure for a solenoid valve, characterized in that, include: The sealing body has grooves on its two sides along the thickness direction, and there is a distance between the location of the grooves and the sealing surface at the outer end of the sealing body. When the sealing body comes into contact with the inner wall of the valve body during movement, the sealing body is unidirectionally deflected, and the airflow flows into the groove on one side, causing the sealing body to undergo radial expansion deformation to compensate for the loss of sealing interference caused by wear on its outer sealing surface.

6. The sealing structure of a solenoid valve according to claim 5, characterized in that, The two grooves can be arranged symmetrically or staggered.

7. The sealing structure of a solenoid valve according to claim 5, characterized in that, The sealing element body also has protrusions on both sides along the thickness direction.

8. The sealing structure of a solenoid valve according to claim 5, characterized in that, The inner end face of the sealing element body is arc-shaped and forms an inner sealing arc surface.

9. The sealing structure of a solenoid valve according to claim 7, characterized in that, The groove is located between the outer sealing surface of the sealing element body and the protrusion.

10. A sealing structure for a solenoid valve, characterized in that, include: The sealing body has an outer end face set as a Gothic arc surface, which is formed by the intersection of two non-concentric arcs, and the intersection point of the two arcs forms a pointed arch apex for contact and sealing with the inner wall of the valve body. The sealing element body has grooves on two sides along its thickness direction. The grooves are located at a distance from the Gothic arc surface. When the sealing element body contacts and seals with the inner wall of the valve body during movement, the sealing element body is unidirectionally deflected. Airflow flows into the groove on one side and causes the sealing element body to undergo radial expansion deformation to compensate for the loss of sealing interference caused by wear of the Gothic arc surface.

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