Dynamic sealing V-shaped sealing ring capable of guaranteeing long service life of valve

Abstract

The utility model discloses a dynamic sealing V-shaped sealing ring capable of guaranteeing long service life of a valve, relates to the technical field of valve sealing, and solves the problem that the sealing performance is reduced due to abrasion deformation of a sealing ring in the prior art. The sealing ring comprises a valve body and a movable valve rod arranged in the valve body, a sealing ring body is arranged between the valve body and the movable valve rod, a V-shaped sealing structure is arranged on one side of the sealing ring body, and a V-shaped working face is arranged on the other side of the sealing ring body. When the valve rod moves, movement sealing of two channels is achieved through the shaft V-shaped sealing ring and the hole V-shaped sealing ring. And the V-shaped sealing structure can fix the sealing ring. Compared with a conventional O-shaped sealing ring, the special V-shaped working surface of the V-shaped sealing ring has the remarkable characteristic of small sealing friction force, the V-shaped sealing ring is supported in the sealing ring groove through the tail part, and compared with the conventional O-shaped sealing ring which realizes the supporting effect through interference magnitude, the rubber stress is small, and the friction force of the rubber to a moving metal piece is reduced.

Description

Technical Field

[0001] This utility model relates to the field of valve sealing technology, and in particular to a valve dynamic sealing ring. Background Technology

[0002] In industrial production and various engineering systems, valves, as key components controlling fluid flow, directly affect the system's safe operation, efficiency, and environmental impact through their sealing performance. Dynamic seals, as one important form of valve sealing, are used to prevent media leakage along the gap between moving parts (such as the valve stem) and stationary parts during valve opening, closing, or regulation. Among these, V-ring seals are widely used in the field of valve dynamic seals due to their unique structure and excellent sealing properties.

[0003] While traditional valve dynamic seals can meet basic sealing requirements to a certain extent, the continuous advancement of industrial technology and the increasing complexity of application scenarios have gradually revealed some problems that urgently need to be addressed. In terms of sealing performance, when valves are used in high-pressure, high-flow-rate, or highly corrosive media conditions, traditional seals struggle to provide a durable and reliable seal. Fluctuations in media pressure may cause the seal lip to fail to maintain a tight seal with the sealing surface, creating a potential leakage hazard. Furthermore, under prolonged exposure to high-pressure media, the seal is prone to deformation, leading to a decline in sealing performance.

[0004] To ensure sealing between passages and prevent cross-contamination during valve opening and closing, dynamic seals are commonly used. However, conventional O-rings require a certain interference fit to maintain a seal. Excessive interference fit during valve movement increases friction, which accelerates wear after repeated use. This ultimately reduces valve sealing reliability over long service lifespans. Therefore, conventional O-rings are insufficient for the special conditions of prolonged valve operation and extended service life. To address these limitations, this patent proposes a V-ring seal designed to ensure the reliability of dynamic seals under long-term valve operating conditions. Utility Model Content

[0005] To address the shortcomings in the aforementioned background technology, this utility model proposes a dynamic sealing V-type sealing ring that ensures a long service life for valves, solving the problem of reduced sealing performance caused by wear and deformation of the sealing ring in the prior art.

[0006] The technical solution of this utility model is implemented as follows: it includes a valve body and a moving valve stem disposed in the valve body, a sealing ring body is provided between the valve body and the moving valve stem, a V-shaped sealing structure is provided on one side of the sealing ring body, and a V-shaped working surface is provided on the other side of the sealing ring.

[0007] More preferably, the sealing ring body is a shaft sealing ring body, the V-shaped sealing structure is located on the inner side of the shaft sealing ring body, and the V-shaped working surface is located on the outer side of the shaft sealing ring body.

[0008] More preferably, the sealing ring body is a hole sealing ring body, the V-shaped sealing structure is located on the outside of the hole sealing ring body, and the V-shaped working surface is located on the inside of the hole sealing ring body.

[0009] More preferably, the outer wall of the V-shaped sealing structure is provided with at least one anti-slip protrusion.

[0010] More preferably, the cross-section of the sealing ring body is a rectangular structure.

[0011] More preferably, the V-shaped working surface is located on one side of the rectangular structure, and the end of the V-shaped slope is a circular arc structure.

[0012] More preferably, the V-shaped sealing structure includes a first sealing lip and a second sealing lip, with one end of the first sealing lip and one end of the second sealing lip both connected to the annular structure, and the first sealing lip and the second sealing lip forming a V-shaped structure.

[0013] More preferably, the connection between the first sealing lip and the second sealing lip on the side near the annular structure is an arc-shaped groove.

[0014] More preferably, the angle between the first sealing lip and the second sealing lip is 30 to 60 degrees.

[0015] More preferably, the first sealing lip, the second sealing lip, and the annular structure are integrally formed.

[0016] More preferably, the ends of the V-shaped working surface are arc-shaped.

[0017] The beneficial effects of this utility model are as follows: When the valve stem moves, it achieves two-way sealing through a V-shaped sealing ring for the shaft and a V-shaped sealing ring for the bore. The sealing ring body is a rubber sealing ring, and the V-shaped sealing structure can fix the sealing ring. The unique V-shaped working surface of the V-shaped sealing ring has a significantly lower sealing friction compared to conventional O-rings. The V-shaped sealing ring is supported in the sealing ring groove by its tail end. Compared to conventional O-rings that achieve support through interference fit, the rubber experiences less force, reducing the friction between the rubber and the moving metal parts. Attached Figure Description

[0018] To more clearly illustrate the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a diagram showing the usage state of this utility model;

[0020] Figure 2 This is a schematic diagram of the structure of the present invention. Figure 1 ;

[0021] Figure 3 for Figure 2 A magnified view of a section at point A in the middle;

[0022] Figure 4 This is a schematic diagram of the structure of the present invention. Figure 2 ;

[0023] Figure 5 for Figure 4 Enlarged view of a section at point B;

[0024] Figure 6 for Figure 4 A magnified view of a section at point C.

[0025] In the diagram: 1. Sealing ring body, 2. V-shaped sealing structure, 3. V-shaped working surface, 4. First sealing lip, 5. Second sealing lip, 6. Anti-slip convex ring. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] like Figure 1As shown in Embodiment 1, a dynamic sealing V-ring for ensuring a long service life of a valve includes a valve body and a moving valve stem slidably disposed within the valve body. A sealing ring body 1 is provided between the valve body and the moving valve stem. A V-shaped sealing structure 2 is provided on one side of the sealing ring body 1, and a V-shaped working surface 3 is provided on the other side. In practical use, the valve stem achieves two-way dynamic sealing through a shaft-type V-ring and a bore-type V-ring. The sealing ring body 1 is a rubber sealing ring. The V-shaped sealing structure 2 assists in fixing the sealing ring body. The V-shaped working surface 3 is opposite to the V-shaped sealing structure 2, resulting in less force on the rubber and reducing friction between the rubber and the moving metal parts. Furthermore, compared to conventional O-rings which control the interference fit through the mounting groove size, the V-ring is elastically supported within the sealing groove by the rubber at its tail. While O-rings have stricter dimensional tolerance requirements during mounting groove machining, the V-ring has lower precision requirements, reducing machining costs.

[0028] like Figure 2 and Figure 3 As shown in Embodiment 2, a dynamic sealing V-type sealing ring for ensuring a long service life of a valve differs from the technical solution of Embodiment 1 in that the sealing ring body 1 is a shaft sealing ring body, the V-shaped sealing structure 2 is located inside the shaft sealing ring body, and the V-shaped working surface 3 is located outside the shaft sealing ring body. The sealing ring body 1 has a rectangular cross-section. The V-shaped working surface 3 is located on one side of the rectangular structure, and the end of the V-shaped slope is a rounded structure. The unique V-shaped working surface 3 of the V-type sealing ring has the significant characteristic of lower sealing friction compared to conventional O-rings. The V-type sealing ring is supported in the sealing ring groove by its tail end. Compared with conventional O-rings that achieve support through interference fit, the rubber experiences less force, reducing the friction between the rubber and the moving metal parts.

[0029] In this embodiment, the V-shaped sealing structure 2 includes a first sealing lip 4 and a second sealing lip 5. One end of the first sealing lip 4 and one end of the second sealing lip 5 are both connected to the annular structure, and the first sealing lip 4 and the second sealing lip 5 form a V-shaped structure. The connection between the first sealing lip 4 and the second sealing lip 5 near the annular structure is an arc-shaped groove. The arc-shaped groove is located on the sealing ring, and the distance between the bottom of the arc-shaped groove and the connection between the sealing ring body 1 and the V-shaped sealing structure 2 is 'a', where 'a' is 0.1~0.3mm, preferably 0.15mm. The included angle between the first sealing lip 4 and the second sealing lip 5 is 30~60 degrees, preferably 56 degrees. The first sealing lip 4, the second sealing lip 5, and the annular structure are integrally formed. The integrally formed design of the sealing ring is more wear-resistant.

[0030] All other structures are the same as in Example 1.

[0031] like Figures 4-6 As shown in Example 3, a dynamic sealing V-type sealing ring is provided to ensure the long service life of a valve. The sealing ring body 1 is a hole sealing ring body, the V-shaped sealing structure 2 is located on the outside of the hole sealing ring body, and the V-shaped working surface 3 is located on the inside of the hole sealing ring body. The V-shaped working surface 3 is located on one side of the rectangular structure, and the end of the V-shaped slope is a rounded structure. The unique V-shaped working surface 3 of the V-type sealing ring has the significant characteristic of lower sealing friction compared with conventional O-rings. The V-type sealing ring is supported in the sealing ring groove by its tail. Compared with conventional O-rings that achieve support through interference fit, the rubber is subjected to less force, reducing the friction between the rubber and the moving metal parts.

[0032] In this embodiment, at least one anti-slip protruding ring 6 is provided on the outer wall of the V-shaped sealing structure 2. The anti-slip protruding ring 6 can increase the friction between the sealing ring and the device. The V-shaped sealing structure 2 includes a first sealing lip 4 and a second sealing lip 5. One end of the first sealing lip 4 and one end of the second sealing lip 5 are both connected to the annular structure, and the first sealing lip 4 and the second sealing lip 5 form a V-shaped structure. The opening distance of the V-shaped structure is greater than the width of the sealing ring body 1. The connection between the first sealing lip 4 and the second sealing lip 5 near the annular structure is an arc-shaped groove. The included angle between the first sealing lip 4 and the second sealing lip 5 is 30 to 60 degrees, preferably 40 degrees. The first sealing lip 4, the second sealing lip 5 and the annular structure are integrally formed. The integrally formed design of the sealing ring is more wear-resistant.

[0033] Specifically, after a million-cycle life test of the actual valve, the wear of the V-ring and the conventional O-ring was compared. It can be seen that the conventional O-ring is severely worn and deformed and can no longer present a perfect round shape, while the V-ring shows no obvious wear and the parts are in good condition.

[0034] All other structures are the same as in Example 1.

[0035] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A dynamic sealing V-type sealing ring for ensuring a long service life of a valve, comprising a valve body and a moving valve stem disposed within the valve body, wherein a sealing ring body (1) is provided between the valve body and the moving valve stem, characterized in that: The sealing ring body (1) has a V-shaped sealing structure (2) on one side and a V-shaped working surface (3) on the other side.

2. The dynamic sealing V-ring as described in claim 1, which ensures a long service life for valves, is characterized in that: The sealing ring body (1) is a shaft sealing ring body, the V-shaped sealing structure (2) is located inside the shaft sealing ring body, and the V-shaped working surface (3) is located outside the shaft sealing ring body.

3. The dynamic sealing V-ring as described in claim 1, which ensures a long service life for valves, is characterized in that: The sealing ring body (1) is a hole sealing ring body, the V-shaped sealing structure (2) is located on the outside of the hole sealing ring body, and the V-shaped working surface (3) is located on the inside of the hole sealing ring body.

4. The dynamic sealing V-ring as described in claim 3, which ensures a long service life for valves, is characterized in that: At least one anti-slip protrusion (6) is provided on the outer wall of the V-shaped sealing structure (2).

5. The dynamic sealing V-ring for ensuring long service life of valves according to any one of claims 2 to 4, characterized in that: The sealing ring body (1) has a rectangular cross-section.

6. The dynamic sealing V-ring as described in claim 5 to ensure a long service life of the valve, characterized in that: The V-shaped working surface (3) is located on one side of the rectangular structure, and the end of the V-shaped slope is a circular arc structure.

7. The dynamic sealing V-ring for ensuring long service life of valves according to any one of claims 1 to 4 and 6, characterized in that: The V-shaped sealing structure (2) includes a first sealing lip (4) and a second sealing lip (5). One end of the first sealing lip (4) and one end of the second sealing lip (5) are both connected to the annular structure, and the first sealing lip (4) and the second sealing lip (5) form a V-shaped structure.

8. The dynamic sealing V-ring as described in claim 7, which ensures a long service life for valves, is characterized in that: The connection between the first sealing lip (4) and the second sealing lip (5) near the side of the annular structure is an arc-shaped groove.

9. The dynamic sealing V-ring as described in claim 8 to ensure a long service life of the valve, characterized in that: The angle between the first sealing lip (4) and the second sealing lip (5) is 30 to 60 degrees.

10. The dynamic sealing V-ring as described in claim 9 to ensure a long service life of the valve, characterized in that: The first sealing lip (4), the second sealing lip (5), and the annular structure are integrally formed.

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