CN113280114A - Thrust sealing rubber ring and working principle thereof - Google Patents

Abstract

A thrust sealing rubber ring is used for tightly holding the outer circle of a straight pipe section at the end part of a connector, and the obtained tightly holding torque force and tightly holding axial force are fixed on the connector, so that the thrust sealing rubber ring can be synchronously inserted into the socket together with a socket to prevent the thrust sealing rubber ring from overturning, rolling and displacing; when the medium is conveyed by the pipeline, the tight-sticking axial force formed by the holding force of the medium, the outer circle of the straight pipe section of the spigot and the clamping force always can be fixed on the spigot when the spigot and socket joint axially displaces, so that the axial fixing effect on the groove is achieved.

Description

Thrust sealing rubber ring and working principle thereof

Technical Field

The invention relates to a sealing rubber ring of a pipe, which is particularly suitable for municipal water supply and drainage pipelines.

Background

The flexible interface connection of the pipe is a common connection mode of the pipeline, and the flexible interface is sealed by a rubber ring, so the sealing performance of the rubber ring is the key for determining the safety and the reliability of the flexible interface pipeline.

At present, the known flexible interface pipeline is sealed by an O-shaped rubber ring arranged in a socket groove, when the O-shaped rubber ring arranged in the groove is mutually pulled in by a socket, pushing and pressing the O-shaped rubber ring to enter the sealing inner circle of the socket head from the transition conical opening of the socket head by the thrust of the groove edge, because the friction coefficient of the rubber ring is very large (the friction coefficient with steel reaches above O.8), the compressed deformation rubber body of the rubber ring is easily moved into the annular gap between the inner circle of the bell mouth seal and the outer circle of the socket groove edge, and is mutually rolled by the socket joint to be damaged, the direct leakage of the interface can be caused by serious damage, even if tiny damage is caused and certain sealing performance is achieved, a concentrated point of rubber ring stress can be formed at a damaged scar part along with the prolonging of the service time, the damaged point of the rubber ring is continuously expanded and cracked, and finally the rubber ring loses the sealing capacity. Therefore, the problem that the interface is leaked due to damage caused by the rubber ring during installation is avoided, and the key for ensuring the sealing reliability of the flexible interface tube is provided.

Disclosure of Invention

The invention aims to provide a sealing rubber ring which can be directly arranged on a straight pipe section of a socket, so that the trouble of processing a groove on the socket is avoided, the defect that the groove can damage the rubber ring is overcome, and the safety and reliability of a flexible interface pipeline are effectively improved.

The left side of the circular cross section of the thrust sealing rubber ring 3 is provided with an arc convex colloid 4, the thickness of the arc convex colloid is larger than the radial clearance height of a sealing cavity formed by inserting a straight pipe section 7 of a socket 1 into a sealing inner circle 8 of a socket 2, and the right side of the thrust sealing rubber ring is provided with a rectangular colloid 5, and the thickness of the rectangular colloid is slightly smaller than the radial clearance height of the sealing cavity. The ring internal diameter of thrust sealing rubber ring is less than the excircle diameter of socket straight body pipeline section, and the ring width of thrust sealing rubber ring is greater than the protruding colloid thickness of circular arc, and the width of rectangle colloid is greater than the width of the protruding colloid of circular arc, and its theory of operation is: the thrust sealing rubber ring arranged on the outer circle of the socket straight pipe section is prevented from rolling over when being pressed into the sealing inner circle from the transition conical surface 6 of the socket by the holding torque and the holding axial force generated by the holding force of the inner circle of the thrust sealing rubber ring on the outer circle of the socket straight pipe section, and the friction resistance generated when the arc convex rubber body enters the inner circle of the sealing cavity from the transition conical surface of the socket is overcome, so that the thrust sealing rubber ring can synchronously enter the socket sealing inner circle under the driving of the socket, and the sealing connection of the interface is completed; when a pipe conveying medium works, when the socket and the spigot are subjected to relative telescopic displacement or the socket moves due to the action of seismic waves on a pipeline, the spigot overcomes the axial compression force formed by the mutual holding force and the clamping force between the outer circle of the straight pipe section and the inner circle of the thrust sealing rubber ring of the spigot, and the axial resultant force formed by the friction resistance generated by the mutual clamping between the inner circle of the socket sealing and the circular arc raised rubber body and the axial thrust generated by the action of the pressure of the conveying medium on the circular ring plane on the side surface of the circular ring of the thrust sealing rubber ring is overcome, so that the thrust rubber ring keeps synchronous displacement and vibration displacement along with the socket, and the dynamic sealing performance of the socket is ensured.

Drawings

FIG. 1 is a schematic view of a thrust seal rubber ring

1. A socket; 2. a socket; 3. a thrust sealing rubber ring; 4. the colloid is convex in a circular arc; 5. rectangular colloid; 6. a transition conical surface; 7. a straight pipe section; 8. sealed inner circle

Detailed Description

Sleeving a thrust sealing rubber ring 3 with the inner diameter smaller than the outer ring diameter of a straight pipe section 7 of the socket 1 by more than 10 percent on the straight pipe section 7 of the socket, wherein the thickness of an arc convex colloid of the thrust sealing rubber ring is more than 30 percent larger than the height of a radial clearance of a sealing cavity formed by a socket sealing inner circle 8 and the outer circle of the straight pipe section 7 of the socket, and the thickness of a rectangular colloid 5 is slightly smaller than the height of the radial clearance of the sealing cavity; coating a lubricant on the inner circle of the bell mouth and the outer circle of the thrust sealing rubber ring, fixing the thrust sealing rubber ring on the bell mouth through the holding torque and the holding axial force obtained by the straight pipe section 7 holding the bell mouth tightly, preventing the thrust sealing rubber ring from turning and rolling in the process of entering the sealing inner circle 8 from the transition conical surface 6 of the bell mouth by the holding torque in the installation process of inserting the bell mouth into the bell mouth by the holding axial force, overcoming the friction resistance born by the thrust sealing rubber ring entering the sealing inner circle from the transition conical surface of the bell mouth, enabling the thrust sealing rubber ring to synchronously enter the bell mouth under the driving of the bell mouth, sealing the bell mouth in the sealing cavity, and completing the sealing connection of the bell mouth. When the pipeline is used for conveying media, the socket overcomes the axial resultant force formed by the friction resistance of the mutual clamping of the circular arc raised colloid of the inner circle of the bell mouth seal and the outer circle of the thrust seal rubber ring and the axial thrust of the pressure of the conveying media on the circular ring plane of the side edge of the thrust seal rubber ring by the aid of the pressing axial force formed by the mutual holding force and the clamping force between the outer circle of the straight pipe section of the socket and the inner circle of the thrust seal rubber ring, so that the thrust seal rubber ring can be fixed on the socket when the socket is subjected to telescopic displacement of the socket connector and vibration and play of the socket connector occur in a seismic wave action pipeline, and the effect of axial fixing of the rubber ring on the socket groove is achieved. When the interface needs independent pressure testing, can install more one thrust sealing rubber ring on socket straight body pipeline section again, through set up between two rubber rings and suppress the aperture, just can become the two rubber ring interfaces of independent pressure testing. When the interface needs to bear higher medium pressure, the problem can be solved by reducing the inner diameter of the thrust sealing rubber ring, or increasing the thickness of the arc convex colloid, or increasing the width of the rectangular colloid of the thrust rubber ring, or increasing one more thrust sealing rubber ring. After the arc convex colloid of the thrust sealing rubber ring is clamped by the bell and spigot, a baffle ring for blocking the thrust sealing rubber ring colloid from being pressed in is formed, the thrust sealing rubber ring rectangular colloid is forced to generate elastic deformation with radial expansion under medium pressure, and the sealing cavity of the interface is added with a sealing force with elastic deformation to form the interface which is self-sealed and has larger sealing force generated by elastic deformation when the medium pressure is borne.

The left side of the circular cross section of an anti-thrust sealing rubber ring is provided with an arc bulge colloid, the right side of the circular cross section of the anti-thrust sealing rubber ring is provided with a rectangular colloid, the anti-thrust sealing rubber ring is directly arranged on a straight pipe section of a socket, and a holding torque force and a holding axial force obtained by holding the outer diameter of the straight pipe section by the inner circle are fixed on the straight pipe section; when a pipeline conveys media, the thrust sealing rubber ring overcomes the axial resultant force formed by the friction axial force formed by the clamping of the arc convex colloid excircle of the thrust sealing rubber ring by the bell mouth sealing inner circle and the axial thrust formed by the medium pressure acting on the plane of the circular ring at the side edge of the thrust sealing rubber ring by the mutual holding force and the mutual clamping force of the inner circle of the thrust sealing rubber ring and the outer circle of the straight pipe section of the spigot and ensures that the thrust sealing rubber ring can be fixed on the spigot when the relative telescopic displacement of the thrust sealing rubber ring on the spigot-and-socket joint and the mutual vibration displacement of the spigot-and-socket caused by the pipeline under the action of seismic waves, thereby achieving the axial fixing effect obtained by the rubber ring; the inner diameter of the ring of the thrust sealing rubber ring is smaller than the outer diameter of the straight pipe section of the socket by more than 10 percent; the thickness of the arc convex colloid of the thrust sealing rubber ring is more than 30% larger than the clearance of the sealing cavity, and the thickness of the rectangular colloid is slightly smaller than the clearance of the sealing cavity; the width of the circular ring of the thrust sealing rubber ring is more than 50% larger than the thickness of the circular arc convex colloid, and the width of the rectangular colloid is larger than that of the circular arc convex colloid; the inner diameter of the thrust sealing rubber ring is reduced, or the width of a circular ring of the thrust sealing rubber ring is increased, or the thickness of a circular arc protruding colloid of the thrust sealing rubber ring is increased, so that the pressure of a medium borne by an interface can be improved; the rectangular colloid of the thrust sealing rubber ring is not compressed by the transition conical surface of the bell mouth in the process of inserting the socket into the bell mouth, and when the rectangular colloid reaches the sealing inner circle of the bell mouth, the outer circle and the sealing inner circle of the thrust sealing rubber ring have a plurality of annular gaps; when two thrust sealing rubber rings are arranged on the straight pipe section of the socket, the interface of the thrust sealing rubber rings can become a double-sealing rubber ring interface capable of independently testing pressure; the circular arc convex colloid of the thrust sealing rubber ring is clamped by the socket sealing inner circle and the straight pipe section of the socket to form a baffle ring for blocking the colloid from pressing in, so that the rectangular colloid of the thrust sealing rubber ring generates elastic deformation with large radial expansion under medium pressure, the sealing cavity of the interface is increased with sealing force of elastic deformation, and the interface becomes self-sealing with larger sealing force generated by elastic deformation when the medium pressure is borne.

Claims (6)

1. The utility model provides a thrust seal rubber ring and theory of operation which characterized in that: the left side of the circular cross section of the thrust sealing rubber ring is provided with an arc bulge colloid, the right side of the circular cross section of the thrust sealing rubber ring is provided with a rectangular colloid, the thrust sealing rubber ring is directly arranged on a straight pipe section of the socket, and a holding torque force and a holding axial force obtained by holding the outer diameter of the straight pipe section by the inner circle are fixed on the straight pipe section; when the pipeline conveys media, the thrust sealing rubber ring overcomes the axial resultant force formed by the friction axial force formed by the clamping force of the inner circle of the thrust sealing rubber ring and the outer circle of the straight pipe section of the socket and the axial thrust formed by the medium pressure on the plane of the circular ring at the side of the thrust sealing rubber ring by the inner circle of the bell mouth sealing rubber ring, so that the thrust sealing rubber ring can be fixed on the socket when the thrust sealing rubber ring moves in a relative telescopic way at the socket joint and the socket vibrates and moves mutually under the action of seismic waves on the pipeline, and the axial fixing effect obtained by installing the rubber ring on the socket groove is achieved.

2. The thrust rubber gasket and the working principle thereof according to claim 1 are characterized in that: the inner diameter of the ring of the thrust sealing rubber ring is smaller than the outer diameter of the straight pipe section of the socket by more than 10 percent; the thickness of the arc convex colloid of the thrust sealing rubber ring is more than 30% larger than the clearance of the sealing cavity, and the thickness of the rectangular colloid is slightly smaller than the clearance of the sealing cavity; the width of the circular ring of the thrust sealing rubber ring is more than 50% larger than the thickness of the circular arc convex colloid, and the width of the rectangular colloid is larger than that of the circular arc convex colloid.

3. The thrust rubber gasket and the working principle thereof according to claim 1 are characterized in that: the inner diameter of the thrust sealing rubber ring is reduced, or the width of a circular ring of the thrust sealing rubber ring is increased, or the thickness of a circular arc protruding colloid of the thrust sealing rubber ring is increased, so that the pressure of a medium borne by the interface can be improved.

4. The thrust rubber gasket and the working principle thereof according to claim 1 are characterized in that: the rectangular colloid of the thrust sealing rubber ring is not compressed by the transition conical surface of the socket in the process of inserting the socket into the socket, and when the rectangular colloid reaches the sealing inner circle of the socket, the outer circle and the sealing inner circle have a plurality of annular gaps.

5. The thrust rubber gasket and the working principle thereof according to claim 1 are characterized in that: when two thrust sealing rubber rings are installed on the straight pipe section of the socket, the interface of the thrust sealing rubber rings can become a double-sealing rubber ring interface capable of independently testing pressure.

6. The thrust rubber gasket and the working principle thereof according to claim 1 are characterized in that: the circular arc convex colloid of the thrust sealing rubber ring is clamped by the socket sealing inner circle and the straight pipe section of the socket to form a baffle ring for blocking the colloid from pressing in, so that the rectangular colloid of the thrust sealing rubber ring generates elastic deformation with large radial expansion under medium pressure, the sealing cavity of the interface is increased with sealing force of elastic deformation, and the interface becomes self-sealing with larger sealing force generated by elastic deformation when the medium pressure is borne.

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