A PVC pipe expansion joint rubber ring

Abstract

The utility model provides a PVC pipe expansion joint rubber ring, which relates to the technical field of pipeline sealing, and includes a rubber ring body, wherein the rubber ring body includes an integrally formed support ring and a sealing ring, wherein an elastic sealing lip is integrally formed in the inner middle of the support ring, wherein the elastic sealing lip is pressed and abutted against the front side of the sealing ring, wherein a deformation ring groove is obliquely provided on the front side of the sealing ring, wherein an extrusion ring is provided in the deformation ring groove, wherein the side surface of the extrusion ring protrudes from the front side surface of the sealing ring, and the rear side surface of the elastic sealing lip abuts against the extrusion ring. The utility model deforms the elastic sealing lip under the action of water pressure and abuts against the extrusion ring, so that the outer side of the sealing ring is protruded on the outer wall of the constricted pipe to form a seal.

Description

Technical Field

[0001] The utility model relates to the technical field of pipeline sealing, in particular to a PVC pipe expansion joint rubber ring. Background Art

[0002] The expansion joint is mainly used to compensate for the expansion and contraction deformation of the PVC pipe caused by temperature changes, and the expansion joint rubber ring is used to protect the sealing performance inside the expansion joint to prevent water or gas leakage. The existing expansion joint seal usually adopts conventional O-rings and the like directly squeezed between the expansion joint and the PVC pipe. However, the thermal expansion and contraction of the PVC pipe will cause friction between the rubber ring, causing the rubber ring to twist or wear, affecting the sealing effect of the rubber ring. At the same time, the directly squeezed sealing ring makes it difficult to install and disassemble the expansion joint and the PVC pipe. Utility Model Content

[0003] 1. Technical issues to be solved

[0004] In view of the deficiencies in the prior art, the utility model provides a PVC pipe expansion joint rubber ring, which solves the problems raised in the above-mentioned background technology.

[0005] (II) Technical solution

[0006] In order to achieve the above objectives, the present invention is implemented through the following technical solutions:

[0007] A PVC pipe expansion joint rubber ring comprises an expansion joint, a pipe and a rubber ring body, wherein the rubber ring body comprises an integrally formed support ring and a sealing ring, wherein the support ring is engaged with the inner wall of the expansion joint by means of a concave-convex fit, and the sealing ring is pressed against the outer wall of the pipe, and an elastic sealing lip is integrally formed on the inner middle part of the support ring, wherein the elastic sealing lip extends toward and presses against the outer wall of the pipe, and the elastic sealing lip is pressed against the front side of the sealing ring.

[0008] Preferably, the rear side surface of the sealing ring is configured as an arc-shaped sliding surface, and the inner diameter of the lower side of the arc-shaped sliding surface is smaller than the outer diameter of the pipeline.

[0009] Preferably, the front end of the elastic sealing lip is arranged as an inclined extrusion surface.

[0010] Preferably, a deformation ring groove is obliquely provided on the front side of the sealing ring, an extrusion ring is provided in the deformation ring groove, a side surface of the extrusion ring protrudes from the front side surface of the sealing ring, and the rear side surface of the elastic sealing lip abuts against the extrusion ring.

[0011] Preferably, the portion of the extrusion ring protruding from the deformation ring groove is connected to a resistance ring, and the width of the resistance ring is greater than the diameter of the extrusion ring.

[0012] Preferably, the inclination of the resistance ring is smaller than the inclination of the front side surface of the sealing ring, the resistance ring is arranged in a thin sheet shape, the resistance ring is arranged in an integrally formed positioning portion and extrusion portion, the lower end of the positioning portion abuts against the lower edge of the front side surface of the sealing ring, the extrusion portion is arranged in a curved arc shape, and the rear side surface of the elastic sealing lip abuts against the extrusion portion.

[0013] (III) Beneficial effects

[0014] The utility model provides a PVC pipe expansion joint rubber ring, which has the following beneficial effects:

[0015] 1. The rubber ring body of the utility model is installed on the inner wall of the expansion joint with the concave and convex parts. The sealing ring is squeezed on the outer wall of the pipe to form a preliminary seal. The water pressure in the PCV pipe causes the elastic sealing lip to deform backward and squeeze on the squeezing ring. The squeezing ring moves backward, and the positioning part at the lower end abuts against the lower edge of the sealing ring to squeeze the outer wall of the pipe to form a temporary hinge point. The elastic sealing lip abuts against the squeezing part and the squeezing part forms a bending squeezing force around the temporary hinge point, so that the abutting ring squeezes the middle part of the sealing ring inward, so that the other side of the middle part of the sealing ring forms a bulge that squeezes on the outer wall of the pipe, forming an installation seal and improving the sealing effect.

[0016] 2. During the expansion and contraction of the PVC pipe, the outer wall of the pipe drives the sealing ring and the elastic sealing lip to deform simultaneously through the compensatory expansion and contraction of the pipe, compensating each other, maintaining the pressure of the resistance ring on the sealing ring and ensuring the sealing effect.

[0017] 3. When maintenance and disassembly are required, remove the water pressure, the elastic sealing lip will reset under its own elastic action, break away from the extrusion ring, the bulge of the sealing ring will reset, and the contact resistance seal will be formed, which is convenient for the disassembly and assembly of the expansion joint and the PVC pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a structural schematic diagram of a PVC pipe expansion joint rubber ring of the utility model;

[0019] Figure 2 It is a cross-sectional view of the rubber ring body in the utility model;

[0020] Figure 3 for Figure 2 A partial enlarged view of the middle part;

[0021] Figure 4 It is a structural schematic diagram of the support ring in the utility model.

[0022] In the figure: 1, rubber ring body; 101, support ring; 102, sealing ring; 103, elastic sealing lip; 2, extrusion ring; 3, resistance ring; 301, extrusion part; 302, positioning part. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0024] The utility model embodiment provides a PVC pipe expansion joint rubber ring,

[0025] like Figure 1-4 As shown, it includes an expansion joint, a pipe and a rubber ring body 1, the rubber ring body 1 is made of elastic rubber material, the rubber ring body 1 includes an integrally formed support ring 101 and a sealing ring 102, a positioning groove is provided on the inner wall of the expansion joint, the support ring 101 is engaged in the positioning groove of the inner wall of the expansion joint with a concave-convex fit, the sealing ring 102 is pressed against the outer wall of the pipe, and an elastic sealing lip 103 is integrally formed on the inner middle part of the support ring 101, and the elastic sealing lip 103 is in contact with the sealing ring 102. An elastic displacement gap is provided between the sealing ring 102 and the supporting ring 101, the elastic sealing lip 103 extends obliquely toward the outer wall of the pipe and abuts against it, the elastic sealing lip is pressed against the front side of the sealing ring 102, the rear side of the sealing ring 102 is provided as an arc-shaped sliding surface, the inner diameter of the lower side of the arc-shaped sliding surface is smaller than the outer diameter of the pipe, the pipe slides through the rubber ring body 1, the pipe abuts against the arc-shaped sliding surface of the sealing ring 102 to deform it and abut against the outer wall of the pipe, the elastic sealing The front side of the lip 103 is set as an inclined extrusion surface, and the rear side of the elastic sealing lip 103 is set as an inclined deformation surface. The front side of the sealing ring 102 is inclined downwardly provided with a deformation ring groove, and an extrusion ring 2 is arranged in the deformation ring groove. The side of the extrusion ring 2 protrudes from the front side of the sealing ring 102, and the rear side of the elastic sealing lip 103 abuts against the extrusion ring 2. The part of the extrusion ring 2 protruding from the deformation ring groove is connected to a resistance ring 3, and the width of the resistance ring 3 is greater than the diameter of the extrusion ring 2. The inclination of the abutment ring 3 is smaller than the inclination of the front side surface of the sealing ring 102. The abutment ring 3 is configured to be in the shape of a thin sheet. The abutment ring 3 is configured to be an integrally formed positioning portion 302 and an extrusion portion 301. The lower end of the positioning portion 302 abuts against the lower edge of the front side surface of the sealing ring 102. The extrusion portion 301 is configured to be in a curved arc shape. The rear side surface of the elastic sealing lip 103 abuts against the extrusion portion 301. The inclination of the inclined deformation surface on the rear side of the elastic sealing tongue is greater than the inclination of the extrusion portion 301.

[0026] Working principle:

[0027] In the utility model, the support ring 101 of the rubber ring body is fixed on the inner wall of the expansion joint by concave-convex cooperation. In the process of the pipeline passing through the rubber ring body, since the inner diameters of the sealing ring 102 and the elastic sealing lip 103 are smaller than the outer diameter of the pipeline, during the process of the pipeline extending, the sealing ring 102 and the elastic sealing lip 103 are pressed and deformed forward and pressed against the outer wall of the pipeline. During use, pressurized water is passed into the expansion joint to squeeze the elastic sealing lip 103, which will cause the elastic sealing lip 103 to deform backward, press against the resistance ring 3, and move the resistance ring 3 backward until the lower edge of the positioning portion 302 of the resistance ring 3 presses against the lower side of the sealing ring so that it presses against the outer wall of the pipeline and is fixed, forming a temporary hinge point. The elastic sealing lip 103 continues to deform and pushes the extrusion portion 301 to rotate around the temporary hinge point, so that the resistance ring 3 presses the sealing ring inward, so that the other side of the sealing ring forms a bulge and presses against the outer wall of the pipeline to form a seal.

[0028] In addition, when disassembly is required, the water pressure is removed and the elastic sealing lip 103 is reset under its own elasticity, so that the abutment ring 3 is reset, the protrusion on the outside of the sealing ring disappears, and the contact protrusion seals and locks the outer wall of the pipeline, so that the expansion joint and the pipeline can be smoothly disassembled.

[0029] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A PVC pipe expansion joint rubber ring, comprising an expansion joint, a pipe and a rubber ring body, characterized in that: The rubber ring body includes an integrally formed support ring and a sealing ring. The support ring is engaged with the inner wall of the telescopic joint in a concave-convex manner. The sealing ring is pressed against the outer wall of the pipe. An elastic sealing lip is integrally formed on the inner middle part of the support ring. The elastic sealing lip extends toward and presses against the outer wall of the pipe. The elastic sealing lip is pressed against the front side of the sealing ring.

2. A PVC pipe expansion joint rubber ring according to claim 1, characterized in that: The rear side surface of the sealing ring is arranged as an arc-shaped sliding surface, and the inner diameter of the lower side of the arc-shaped sliding surface is smaller than the outer diameter of the pipeline.

3. A PVC pipe expansion joint rubber ring according to claim 2, characterized in that: The front end of the elastic sealing lip is arranged as an inclined extrusion surface.

4. A PVC pipe expansion joint rubber ring according to claim 3, characterized in that: A deformation ring groove is obliquely arranged on the front side of the sealing ring, an extrusion ring is arranged in the deformation ring groove, a side surface of the extrusion ring protrudes from the front side surface of the sealing ring, and the rear side surface of the elastic sealing lip abuts against the extrusion ring.

5. A PVC pipe expansion joint rubber ring according to claim 4, characterized in that: The portion of the extrusion ring protruding from the deformation ring groove is connected to a resistance ring, and the width of the resistance ring is greater than the diameter of the extrusion ring.

6. A PVC pipe expansion joint rubber ring according to claim 5, characterized in that: The inclination of the resistance ring is smaller than the inclination of the front side of the sealing ring. The resistance ring is arranged in a thin sheet shape. The resistance ring is arranged in an integrally formed positioning part and extrusion part. The lower end of the positioning part abuts against the lower edge of the front side of the sealing ring. The extrusion part is arranged in a curved arc shape. The rear side of the elastic sealing lip abuts against the extrusion part.

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