Anti-falling valve sealing structure

Abstract

The utility model discloses an anti-falling valve sealing structure which comprises a valve disc and a sealing ring and is characterized in that at least one annular groove is formed in the outer axial face of the sealing ring in the circumferential direction, a protruding structure matched with the annular groove is correspondingly arranged on the inner wall of the valve disc, and the valve disc is clamped and matched with the annular groove through the protruding structure. Axial and radial fixation of the sealing ring is achieved. The multiple annular grooves are formed in the outer axial face of the sealing ring and matched with the protruding structure of the valve disc in a clamped mode, so that the sealing ring is fixed in the axial direction and the radial direction, and the problem that a traditional outer single-groove sealing ring is prone to falling off is solved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to valve sealing technical field, especially relate to a prevent falling's valve sealing structure. BACKGROUND

[0002] Traditional valve sealing structure adopts single groove sealing ring design, relies on single annular groove and valve disc cooperation fixed, but under the fluid pressure fluctuation or mechanical vibration, sealing ring is easy to have axial displacement even fall off, leads to sealing failure. Although some adopt the problem of falling off is alleviated by adding bolt or multilayer sealing, but there is complex structure, high cost and inconvenient maintenance and other defects. SUMMARY

[0003] The utility model discloses a prevent falling's valve sealing structure, through the clamping of the multiple annular grooves on the outer axial surface of the sealing ring and the convex structure of the valve disc, the axial and radial fixation of the sealing ring is realized, and the problem that the traditional outer single groove sealing ring is easy to fall off is solved.

[0004] Technical scheme: in order to realize the above object, a prevent falling's valve sealing structure of the utility model, including valve disc and sealing ring, the outer axial surface of the sealing ring is provided with at least one annular groove along the circumference, the inner wall of the valve disc is provided with the convex structure matched with the annular groove, and the axial and radial fixation of the sealing ring is realized through the clamping of the convex structure and the annular groove.

[0005] Further, the cross section of the annular groove is trapezoidal or rectangular.

[0006] Further, the number of the annular groove is 2 evenly distributed along the radial direction of the sealing ring.

[0007] Further, the number of the annular groove is 3-5 evenly distributed along the radial direction of the sealing ring.

[0008] Further, the cross section shape of the convex structure is matched with the cross section shape of the annular groove, and the height of the convex structure is 0.8-1.2 times the depth of the annular groove.

[0009] Further, the material of the sealing ring is high-temperature-resistant rubber or fluorine rubber, and the surface is coated with wear-resistant coating.

[0010] Further, the convex structure of the valve disc is fixed on the inner wall of the valve disc by integral molding or welding.

[0011] Further, the contact surface between the sealing ring and the valve disc is also provided with an auxiliary positioning groove, and an elastic metal ring is embedded in the auxiliary positioning groove, to enhance the deformation resistance of the sealing ring.

[0012] Further, the valve disc is provided with a coaxial cover plate connected by fasteners, and the valve disc and the cover plate clamp the sealing ring.

[0013] Further, the sealing ring has a sealing structure part extending to a position outside the circumferential side of the valve disc, the cross section of the sealing structure part is circular, and the sealing structure part is in extrusion contact with the inner cavity wall of the valve body to achieve sealing cooperation.

[0014] Beneficial effects: the multi-ring grooves on the outer axial surface of the sealing ring are matched with the clamping of the convex structure of the valve disc, realizing the bidirectional fixation of the sealing ring in the axial and radial directions, solving the problem of easy falling of the traditional outer single-groove sealing ring; at the same time, the uniform distribution design of the multiple grooves enhances the force balance of the sealing ring, avoiding local deformation; the application of high-temperature-resistant material and surface wear-resistant coating significantly improves the durability of the sealing ring in high-temperature and corrosive medium. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a half-section structure schematic diagram of the valve sealing structure of the utility model;

[0016] Figure 2 It is Figure 1 A structure enlarged schematic diagram of the middle A area. DETAILED DESCRIPTION

[0017] The utility model will be further described below in combination with the drawings.

[0018] As Figure 1 And Figure 2 As shown in a kind of anti-falling valve sealing structure, including valve disc 1 and sealing ring 2, the outer axial surface of the sealing ring 2 is provided with at least one annular groove 21 along the circumference, the inner wall of the valve disc 1 is provided with the convex structure 11 corresponding with the annular groove 21 cooperation, the axial and radial fixation of the sealing ring 2 is realized by the clamping cooperation of the convex structure 11 and the annular groove 21.The utility model realizes the bidirectional fixation of the sealing ring in the axial and radial directions by the clamping cooperation of the multi-ring grooves on the outer axial surface of the sealing ring and the convex structure of the valve disc, solves the problem of easy falling of the traditional outer single-groove sealing ring.Moreover, the cross section of the annular groove 21 is trapezoidal or rectangular, and the trapezoidal or rectangular groove design enhances the mechanical engagement force, prevents the displacement of the sealing ring caused by pressure fluctuation or vibration.

[0019] More specifically, the number of annular grooves 21 is 2 evenly distributed along the radial direction of the sealing ring 2, or the number of annular grooves 21 is 3-5 evenly distributed along the radial direction of the sealing ring 2, and the uniform distribution design of the annular grooves makes the force of the sealing ring 2 more balanced, avoiding local stress concentration leading to wear or deformation, and the multi-groove structure further improves the contact area of the sealing ring 2 and the valve disc 1, enhances the sealing effect and stability.

[0020] The cross-sectional shape of the convex structure 11 matches the cross-sectional shape of the annular groove 21, ensuring fitting accuracy, reducing assembly gap, reducing the risk of leakage, and the height of the convex structure 11 is 0.8-1.2 times the depth of the annular groove 21, which can ensure tight clamping and avoid installation difficulty or material fatigue caused by interference fit.

[0021] The material of the sealing ring 2 is high-temperature-resistant rubber or fluororubber, which can adapt to harsh working conditions such as high temperature and corrosive medium, expand the application scene of the valve, and the surface is coated with a wear-resistant coating to reduce wear and prolong life.

[0022] The convex structure 11 of the valve disc 1 is fixed to the inner wall of the valve disc 1 by integral molding or welding, and the integral molding process ensures the integrity of the convex structure 11 and the inner wall of the valve disc 1, avoiding the risk of loosening caused by welding or bolt connection.

[0023] An auxiliary positioning groove 23 is further arranged between the contact surface of the sealing ring 2 and the valve disc 1, and an elastic metal ring 6 is embedded in the auxiliary positioning groove 23, which is used to enhance the anti-deformation ability of the sealing ring 2. The anti-deformation ability of the sealing ring 2 under high pressure or temperature change is enhanced to prevent sealing failure caused by material creep, and the metal ring provides additional support to prevent the sealing ring 2 from collapsing due to long-term pressure.

[0024] The valve disc 1 is provided with a coaxial cover plate 3 connected by a fastener 4, and the valve disc 1 and the cover plate 3 cooperate to clamp the sealing ring 2, thereby improving the stability of the sealing ring 2 installation, and the fastener 4 can be a bolt.

[0025] The valve disc 1 can be made of stainless steel with good corrosion resistance and high strength, and the valve disc 1 is surface polished to reduce the frictional resistance between the sealing ring 2 and the valve disc 1, reduce the opening and closing torque, and reduce wear.

[0026] The sealing ring 2 has a sealing structure part 22 extending to the outer circumferential side of the valve disc 1, and the cross section of the sealing structure part 22 is circular, and the sealing structure part 22 is in extrusion contact with the inner cavity wall of the valve body 5 to realize sealing cooperation.

[0027] The above only describes preferred embodiments of the present application, and it should be pointed out that for ordinary skilled persons in the art, without departing from the principles of the present application, a number of improvements and refinements can be made, and these improvements and refinements should be considered as the protection scope of the present application.

Claims

1. A valve sealing structure for preventing detachment, comprising a valve disc (1) and a sealing ring (2), characterized in that: The outer axial surface of the sealing ring (2) is provided with at least one annular groove (21) along the circumferential direction. The inner wall of the valve disc (1) is provided with a protrusion structure (11) that cooperates with the annular groove (21). The axial and radial fixation of the sealing ring (2) is achieved through the snap-fit ​​cooperation between the protrusion structure (11) and the annular groove (21).

2. The valve sealing structure for preventing detachment according to claim 1, characterized in that: The cross-section of the annular groove (21) is trapezoidal or rectangular.

3. The valve sealing structure for preventing detachment according to claim 1, characterized in that: The number of the annular grooves (21) is two, which are evenly distributed radially along the sealing ring (2).

4. The valve sealing structure for preventing detachment according to claim 1, characterized in that: The number of the annular grooves (21) is 3-5, which are evenly distributed along the radial direction of the sealing ring (2).

5. A valve sealing structure for preventing detachment according to claim 1, 2, 3, or 4, characterized in that: The cross-sectional shape of the protrusion (11) matches the cross-sectional shape of the annular groove (21), and the height of the protrusion (11) is 0.8 to 1.2 times the depth of the annular groove (21).

6. The valve sealing structure for preventing detachment according to claim 1, characterized in that: The sealing ring (2) is made of high-temperature resistant rubber or fluororubber, and its surface is coated with a wear-resistant coating.

7. The valve sealing structure for preventing detachment according to claim 1, characterized in that: The protruding structure (11) of the valve disc (1) is fixed to the inner wall of the valve disc (1) by integral molding or welding.

8. The valve sealing structure for preventing detachment according to claim 1, characterized in that: An auxiliary positioning groove (23) is provided between the contact surface of the sealing ring (2) and the valve disc (1). An elastic metal ring (6) is embedded in the auxiliary positioning groove (23) to enhance the deformation resistance of the sealing ring (2).

9. The valve sealing structure for preventing detachment according to claim 1, characterized in that: The valve disc (1) is connected by fasteners (4) and has a coaxial cover plate (3). The valve disc (1) and the cover plate (3) cooperate to clamp the sealing ring (2).

10. The valve sealing structure for preventing detachment according to claim 9, characterized in that: The sealing ring (2) has a sealing structure part (22) extending to the outer circumferential side of the valve disc (1). The cross-section of the sealing structure part (22) is circular. The sealing structure part (22) is pressed against the inner wall of the valve body (5) of the valve to achieve a sealing fit.

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