Gate valve sealing ring

Abstract

The utility model discloses a gate valve sealing ring which comprises a supporting portion used for being matched and fixed with a valve body, a sealing matching portion used for being matched and sealed with a gate plate and a hole which is arranged corresponding to a valve port of the valve body and used for fluid to pass through, the supporting portion is of a cylindrical structure, and the hole is composed of an inner hole of the supporting portion of the cylindrical structure. The sealing matching part is integrally formed at one axial end of the supporting part, an integrally formed annular flange is arranged on the outer side of the other axial end of the supporting part, the sealing matching part comprises an arc-shaped matching surface arranged at one axial end of the supporting part, and the arc-shaped matching surface is connected between the inner peripheral wall and the outer peripheral wall of the supporting part. An annular groove is formed in one axial end of the inner circumferential wall of the supporting part. The gate valve sealing ring is simple in structure and has better fixing and sealing effects.

Description

Technical Field

[0001] The utility model relates to a gate valve sealing ring. Background Art

[0002] A gate valve is a common industrial valve primarily used to control the flow of fluids. It operates by opening and closing the valve using a gate disc, thereby controlling the flow of fluid. The gate disc and valve port work together to open and close the valve. A sealing ring is located at the valve port, ensuring close contact with the gate disc. This improves the seal between the disc and the port, preventing fluid leakage.

[0003] In the prior art, sealing ring products suitable for gate valves usually adopt an annular structure. The inner hole and valve port of the annular sealing ring are set at corresponding positions to allow fluid to pass through. The main body of the sealing ring usually includes a supporting part and a sealing matching part. The supporting part is used to cooperate with the valve body for fixation so that the sealing ring as a whole can be fixed and maintained at the valve port, and the sealing matching part is used to cooperate with the gate plate for contact and sealing. Summary of the Invention

[0004] The utility model provides a gate valve sealing ring which has a simple structure and better fixing and sealing effects.

[0005] The gate valve sealing ring of the present invention includes a support portion for fixing with the valve body, a sealing matching portion for sealing with the gate plate, and a hole arranged corresponding to the valve port of the valve body and for allowing fluid to pass through. The support portion is a cylindrical structure, and the hole is composed of the inner hole of the support portion of the cylindrical structure. The sealing matching portion is integrally formed at one axial end of the support portion, and the outer side of the other axial end of the support portion includes an integrally formed annular flange. The sealing matching portion includes an arcuate matching surface arranged at one axial end of the support portion, and the arcuate matching surface is used to contact and seal with the gate plate. The arcuate matching surface is connected Between the inner circumferential wall and the outer circumferential wall of the support part, the inner circumferential wall of the support part includes an annular groove at one axial end thereof. When the gate of the gate valve moves in the direction of closing the valve port, it will come into contact with the sealing mating part. The contact and cooperation of the arc-shaped mating surface drives the sealing mating part to move toward the other axial end of the support part, and causes the support part to produce axial compression deformation. The provision of the annular groove can improve this deformation effect, so that the sealing mating part can be reliably pressed and contacted on the gate plate, thereby improving the sealing effect. This structural design can also reduce the wear between the gate plate and the sealing ring, and improve the service life of the sealing ring.

[0006] Furthermore, the arc-shaped mating surface is composed of an inner arc surface and an outer arc surface radially connected along the axis of the support portion, the radius of the outer arc surface is greater than the radius of the inner arc surface, and the arc length of the outer arc surface is greater than the arc length of the inner arc surface.

[0007] Furthermore, the annular groove is composed of a first arc surface, a second arc surface, and a third arc surface which are connected in sequence along the axial direction of the support portion, wherein the first arc surface is connected to the arc-shaped mating surface, the third arc surface is connected to the inner circumferential wall of the support portion, the arc center of the first arc surface is set in the direction away from the axial center of the support portion, and the arc centers of the second arc surface and the third arc surface are set in the direction toward the axial center of the support portion.

[0008] Furthermore, the radius of the second arc surface is greater than the radius of the third arc surface, the arc length of the second arc surface is greater than the arc length of the third arc surface, and the arc length of the first arc surface is less than the arc lengths of the second and third arc surfaces.

[0009] Furthermore, an annular gap is formed between the axial end of the annular flange in the direction of the corresponding arc-shaped mating surface and the outer peripheral wall of the support part, and a plurality of annular ribs are arranged at intervals on the inner wall of the annular gap. When the support part is inserted into the inner hole of the valve port, the annular ribs on the inner wall of the annular gap can contact and cooperate with the end or inner peripheral wall of the valve port, thereby further improving the sealing effect between the valve port and the support part.

[0010] Furthermore, a plurality of annular ribs are integrally formed on the outer peripheral wall of the support portion and are distributed along the axial direction, thereby improving the contact and matching effect with the inner peripheral wall of the valve port, thereby further improving the sealing effect between the valve port and the support portion.

[0011] Furthermore, the other axial end face of the annular flange that is away from the arc-shaped mating surface is connected to the other axial end face of the support portion and is on the same plane. A number of concentric annular ribs are arranged between the other axial end face of the annular flange and the other axial end face of the support portion and are distributed at intervals along the radial direction. The other axial end face of the annular flange and the other axial end face of the support portion can be used to cooperate with the pipe end of the gate valve to tighten the seal, so that the sealing ring can be firmly fixed at the valve port. The setting of the arc-shaped ribs can improve the sealing cooperation effect with the pipe end.

[0012] Furthermore, the annular rib has an arc-shaped profile.

[0013] Furthermore, it is made of nitrile rubber or polyurethane material.

[0014] The beneficial effects of the utility model are as follows: the utility model is an integrated structure with a simple structure, is convenient for production, processing and assembly, has a good fixed installation effect, is not easy to loosen or shift during use, is not easy to wear when cooperating with the gate plate of the gate valve, and has a good sealing effect and service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A cross-sectional view of an embodiment of the present utility model;

[0016] Figure 2 for Figure 1 A partial enlarged view of

[0017] Figure 3 This is a schematic diagram of the assembly of an embodiment of the present utility model. DETAILED DESCRIPTION

[0018] The implementation of the gate valve sealing ring of the utility model is as follows Figure 1-3 As shown: it includes a support portion 1 for fixing with the valve body, a sealing matching portion 2 for sealing with the gate, and a hole 3 arranged corresponding to the valve port a of the valve body and for allowing fluid to pass through. The support portion 1 is a cylindrical structure, and the hole 3 is composed of the inner hole of the support portion 1 of the cylindrical structure. As shown in the figure, the sealing matching portion 2 is integrally formed at one axial end of the support portion 1, and the outer side of the other axial end of the support portion 1 includes an integrally formed annular flange 11. The sealing matching portion 2 includes an arcuate matching surface arranged at one axial end of the support portion 1, and the arcuate matching surface is used to contact and seal with the gate. The arcuate matching surface is connected between the inner circumferential wall and the outer circumferential wall of the support portion 1. The inner peripheral wall of the support portion 1 includes an annular groove 12 at one axial end thereof. When the gate of the gate valve moves in the direction of closing the valve port a, that is, when it moves in a direction perpendicular to or slightly inclined to the axial direction of the sealing ring, it will come into contact with the sealing mating portion. The contact and fit of the arc-shaped mating surface drives the sealing mating portion 2 toward the other axial end of the support portion 1, and causes the support portion 1 to produce axial compression deformation. The provision of the annular groove 12 can improve the axial compression deformation effect, so that the sealing mating portion 2 can be reliably and elastically pressed into contact with the gate, thereby improving the sealing effect. This structural design can also reduce the wear between the gate and the sealing ring, and improve the service life of the sealing ring.

[0019] like Figure 2 As shown, the arc-shaped mating surface is composed of an inner arc surface 21 and an outer arc surface 22 connected radially along the axis of the support part 1. The radius of the outer arc surface 22 is greater than the radius of the inner arc surface 21, and the arc length of the outer arc surface 22 is greater than the arc length of the inner arc surface 21.

[0020] The annular groove 12 is composed of a first arc surface 121, a second arc surface 122, and a third arc surface 123 which are connected in sequence along the axial direction of the support part 1, wherein the first arc surface 121 is connected to the inner arc surface 21 of the arc-shaped mating surface, and the third arc surface 123 is connected to the inner circumferential wall of the support part 1. The arc center of the first arc surface 121 is set in the direction away from the axial center of the support part 1, and the first arc surface 121 is convex relative to the inner hole direction of the support part 1. The arc centers of the second arc surface 122 and the third arc surface 123 are set in the direction of the axial center of the support part 1, and are concave relative to the inner hole direction of the support part 1.

[0021] The radius of the second arc surface 122 is greater than the radius of the third arc surface 123, the arc length of the second arc surface 122 is greater than the arc length of the third arc surface 123, the arc length of the first arc surface 121 is less than the arc lengths of the second arc surface 122 and the third arc surface 123, and the first arc surface 121 has a longer radius, which mainly serves as a transition connection between the second arc surface 122 and the inner arc surface 21.

[0022] An annular gap b is formed between one axial end of the annular flange 11 in the direction of the corresponding arc-shaped mating surface and the outer peripheral wall of the support part 1. A number of annular ribs 13 are arranged at intervals on the inner wall of the annular gap b. When the support part 1 is inserted into the inner hole of the valve port a, the annular ribs 13 on the inner wall of the annular gap b can contact and cooperate with the end or inner peripheral wall of the valve port a, further improving the sealing effect between the valve port and the support part 1.

[0023] In this embodiment, if Figure 3 As shown, a plurality of annular ribs 13 are integrally formed on the outer peripheral wall of the support portion 1 and are distributed along the axial direction to improve the contact and matching effect with the inner peripheral wall of the valve port a, thereby further improving the sealing effect between the valve port a and the valve port a.

[0024] The other axial end face of the annular flange 11 that is away from the arc-shaped mating surface is connected to the other axial end face of the support portion 1 and is on the same plane. A number of concentric and radially spaced annular ribs 14 are provided between the other axial end face of the annular flange 11 and the other axial end face of the support portion 1. The other axial end face of the annular flange 14 and the other axial end face of the support portion 1 can be used to cooperate with the pipe end c of the gate valve for compression sealing, such as Figure 3 As shown, the pipe end c and the valve body d cooperate to compress the annular flange 11, and the support part 1 is inserted and positioned at the valve port a, so that the sealing ring can be firmly fixed at the valve port a. The setting of the arc-shaped rib 14 can improve the sealing cooperation effect with the pipe end c, so that the sealing ring can also be used to seal between the pipe end c and the valve body.

[0025] The annular ribs (13, 14) have an arc-shaped profile.

[0026] The gate valve sealing ring of this embodiment is integrally formed of nitrile rubber or polyurethane material.

[0027] The above embodiment is only one preferred embodiment of the present invention. Common changes and substitutions made by those skilled in the art within the scope of the technical solution of the present invention are all included in the protection scope of the present invention.

Claims

1. A gate valve sealing ring, comprising a support portion for cooperating and fixing with a valve body, a sealing portion for cooperating and sealing with a gate plate, and a hole corresponding to the valve port of the valve body and for allowing fluid to pass through, characterized in that: The support portion is a cylindrical structure, the hole is formed by the inner hole of the support portion of the cylindrical structure, the sealing fitting portion is integrally formed at one axial end of the support portion, and the outer side of the other axial end of the support portion includes an integrally formed annular flange, the sealing fitting portion includes an arc-shaped fitting surface arranged at one axial end of the support portion, the arc-shaped fitting surface is connected between the inner circumferential wall and the outer circumferential wall of the support portion, and the inner circumferential wall of the support portion includes an annular groove at one axial end thereof.

2. The gate valve sealing ring according to claim 1, characterized in that: The arc-shaped matching surface is composed of an inner arc surface and an outer arc surface radially connected along the axis of the support portion, the radius of the outer arc surface is greater than the radius of the inner arc surface, and the arc length of the outer arc surface is greater than the arc length of the inner arc surface.

3. The gate valve sealing ring according to claim 1, characterized in that: The annular groove is composed of a first arc surface, a second arc surface, and a third arc surface connected in sequence along the axial direction of the support part, wherein the first arc surface is connected to the arc-shaped mating surface, the third arc surface is connected to the inner circumferential wall of the support part, the arc center of the first arc surface is set in the direction away from the axial center of the support part, and the arc centers of the second arc surface and the third arc surface are set in the direction of the axial center of the support part.

4. The gate valve sealing ring according to claim 3, characterized in that: The radius of the second arc surface is greater than the radius of the third arc surface, the arc length of the second arc surface is greater than the arc length of the third arc surface, and the arc length of the first arc surface is less than the arc lengths of the second and third arc surfaces.

5. The gate valve sealing ring according to claim 1, characterized in that: An annular gap is formed between one axial end of the annular flange in the direction of the arc-shaped matching surface and the outer peripheral wall of the support portion, and a plurality of annular ribs are arranged at intervals on the inner wall of the annular gap.

6. The gate valve sealing ring according to claim 5, characterized in that: A plurality of annular convex ribs are integrally formed on the outer peripheral wall of the support portion and are distributed along the axial direction.

7. The gate valve sealing ring according to claim 1, characterized in that: The other axial end face of the annular flange that is away from the arc-shaped mating surface is connected to the other axial end face of the support portion and is located on the same plane. A number of concentric annular ribs are arranged between the other axial end face of the annular flange and the other axial end face of the support portion and are spaced apart in the radial direction.

8. The gate valve sealing ring according to any one of claims 5 to 7, characterized in that: The annular rib has an arc-shaped profile.

9. The gate valve sealing ring according to claim 1, characterized in that: Made of nitrile rubber or polyurethane material.

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