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CN-121993681-A - Sealing connection sleeve for pipelines and preparation method thereof

CN121993681ACN 121993681 ACN121993681 ACN 121993681ACN-121993681-A

Abstract

The invention discloses a sealing connecting sleeve for a pipeline and the pipeline, which comprises a rigid outer sleeve, wherein a limiting convex ring is arranged in the middle of the inner surface of the rigid outer sleeve, guide conical surfaces are arranged on the inner surface of the rigid outer sleeve close to two ends of the inner surface of the rigid outer sleeve, a rubber sealing inner sleeve is fixedly connected to the inner surface of the section of the rigid outer sleeve between the limiting convex ring and each guide conical surface, at least one deformable sealing convex ring is arranged on the inner surface of the rubber sealing inner sleeve, the minimum inner diameter of the sealing convex ring before deformation is smaller than the outer diameter of the pipeline matched with the sealing convex ring, the minimum inner diameter of the inner surface of the rigid outer sleeve on one side of the limiting convex ring is larger than the outer diameter of the pipeline connected with the sealing convex ring, and when the pipeline is connected, the end part of the pipeline is guided to pass through the inner hole of the rubber sealing inner sleeve through the guide conical surfaces and simultaneously extrudes the sealing convex ring so that the sealing convex ring is tightly attached to the outer surface of the pipeline, and the end part of the pipeline is limited and positioned through the side surface of the limiting convex ring. The connecting pipeline has the advantages of high installation speed, good sealing performance and low manufacturing cost. The invention also discloses a preparation method of the sealing connecting sleeve.

Inventors

  • LIN CHANGCHENG

Assignees

  • 福建新通源复合材料科技有限公司

Dates

Publication Date
20260508
Application Date
20241101

Claims (12)

  1. 1. A sealing connection sleeve for pipelines comprises a rigid outer sleeve and is characterized in that a limiting convex ring is arranged in the middle of the inner surface of the rigid outer sleeve, guide conical surfaces are arranged on the inner surface of the rigid outer sleeve close to two ends of the inner surface of the rigid outer sleeve, a rubber sealing inner sleeve is fixedly connected to the inner surface of the section of the rigid outer sleeve between the limiting convex ring and each guide conical surface, at least one deformable sealing convex ring is arranged on the inner surface of each rubber sealing inner sleeve, and the minimum inner diameter of the sealing convex ring before deformation is smaller than the outer diameter of a pipeline matched with the sealing convex ring; when the pipeline is connected, the end part of the pipeline is guided through the inner hole of the rubber sealing inner sleeve through the guide conical surface and simultaneously extrudes the sealing convex ring so that the sealing convex ring is tightly attached to the outer surface of the pipeline, and the end part of the pipeline is limited and positioned through the side surface of the limiting convex ring and cannot be contacted with the rubber sealing inner sleeve positioned at the other side of the limiting convex ring.
  2. 2. A sealing connection sleeve for pipelines according to claim 1, wherein two deformable sealing convex rings are arranged on the inner surface of each rubber sealing inner sleeve, and when the pipelines are connected, the minimum inner diameter of a first sealing convex ring contacted with the end part of the pipeline is larger than the minimum inner diameter of a second sealing convex ring contacted with the end part of the pipeline.
  3. 3. A pipe to pipe sealing connection sleeve as defined in claim 2 wherein a side of the first sealing collar is disposed against an adjacent side of the second sealing collar after connection to the pipe.
  4. 4. The sealing connection sleeve for pipelines of claim 1, wherein a plurality of annular grooves are formed in the peripheral surface of each rubber sealing inner sleeve, and the rigid outer sleeve part extends into the annular grooves to be fixedly connected with the rubber sealing inner sleeves; the cross sections of the annular grooves are of dovetail groove structures, and the cross sections of the annular grooves are irregularly arranged.
  5. 5. A sealing connection sleeve for pipes according to claim 1, wherein the minimum distance between one side of the limiting convex ring and the nearest sealing convex ring adjacent to the rubber sealing inner sleeve is 1/7-1/4 of the axial length of the rigid outer sleeve.
  6. 6. The sealing connection sleeve for pipelines according to claim 1, wherein the outer peripheral surface of the rigid outer sleeve is provided with an arc-shaped annular bulge corresponding to the position of the rubber sealing inner sleeve; The inner surface of the rigid outer sleeve is provided with a section of cylindrical inner surface close to two end parts, each section of cylindrical inner surface is connected with one guide conical surface, and the inner diameter of each section of cylindrical inner surface is larger than the outer diameter of the connecting pipeline.
  7. 7. A sealing joint sleeve for pipes according to any of claims 1 to 6 wherein said rigid outer jacket is cured by filament winding impregnated with resin.
  8. 8. A sealed joint sleeve for pipes according to claim 7 wherein said rigid outer jacket is resin bonded with a fabric.
  9. 9. A method of making a sealed connection sleeve according to any one of claims 1 to 8, comprising the steps of: The method comprises the steps that firstly, a soft sleeve mold and a required rubber sealing inner sleeve are manufactured in advance, annular grooves matched with the limiting convex rings and a plurality of annular matching grooves respectively matched with the sealing convex rings on the inner surface of the plurality of rubber sealing inner sleeves are formed in the peripheral surface of the soft sleeve mold, limiting flanges are outwards extended at two ends of the soft sleeve mold, and the other peripheral surfaces of the soft sleeve mold are matched with the inner surfaces of the rigid outer sleeve and the inner surfaces of the rubber sealing inner sleeves; step two, sleeving a plurality of rubber sealing inner sleeves on corresponding positions of the outer peripheral surface of the soft sleeve mold, so that sealing convex rings on the inner surface of the rubber sealing inner sleeves are matched with corresponding annular matching grooves on the outer peripheral surface of the soft sleeve mold; Step three, sleeving a soft sleeve die with a plurality of rubber sealing inner sleeves on a rigid sleeve with a contractible and expandable pipe diameter, then expanding the pipe diameter of the rigid sleeve to tightly support the inner surface of the soft sleeve die, and coating a layer of wax on the outer peripheral surface of the soft sleeve die which is not matched with the rubber sealing inner sleeves; winding the fiber soaked with the resin on the outer peripheral surface of the rubber sealing inner sleeve, which is not matched with the rubber sealing inner sleeve, between the outer surface of the rubber sealing inner sleeve and the two limit flanges of the soft sleeve mold; step five, after the resin is solidified after winding is completed, the pipe diameter of the rigid sleeve is contracted, and the soft sleeve mold and the manufactured sealing connecting sleeve are taken down from the rigid sleeve together; And step six, deforming the soft sleeve mold to separate the soft sleeve mold from the sealing connecting sleeve, and taking down the sealing connecting sleeve to finish the preparation.
  10. 10. The method of claim 9, wherein the rigid sleeve with the collapsible and expandable diameter in the third step is composed of a plurality of arcuate plates, the arcuate plates are connected to a driving mechanism, and the arcuate plates are driven by the driving mechanism to move back and forth in the radial direction to collapse and expand the diameter of the rigid sleeve.
  11. 11. A method of making a sealed connection sleeve according to any one of claims 1 to 8, comprising the steps of: The method comprises the steps of firstly, manufacturing a required rubber sealing inner sleeve and manufacturing a rigid sleeve mold with a contractible and expandable pipe diameter in advance, wherein the rigid sleeve mold consists of a plurality of arc plates, the arc plates are connected to a driving mechanism, and the arc plates are driven to move back and forth along the radial direction by the driving mechanism so as to realize contraction and expansion of the pipe diameter of the rigid sleeve mold; Firstly, shrinking the pipe diameter of the rigid sleeve mold through a driving mechanism, sleeving a plurality of rubber sealing inner sleeves on corresponding positions on the outer peripheral surface of the rigid sleeve mold, and then expanding the pipe diameter of the rigid sleeve mold through the driving mechanism, so that a sealing convex ring on the inner surface of the rubber sealing inner sleeve is matched with a corresponding annular matching groove on the outer peripheral surface of the rigid sleeve mold, and coating a layer of wax on the outer peripheral surface of the rigid sleeve mold which is not matched with the rubber sealing inner sleeve; Winding the fiber soaked with the resin on the outer surface of the rubber sealing inner sleeve and the corresponding outer peripheral surface of the rigid sleeve mold which is not matched with the rubber sealing inner sleeve; And fourthly, after the resin is solidified after winding is completed, the rigid sleeve mold contracts the pipe diameter through a driving mechanism, and the manufactured sealing connecting sleeve is taken down from the rigid sleeve mold.
  12. 12. The method of manufacturing a sealed connection sleeve according to claim 11, wherein: And step five, trimming two end surfaces of the manufactured sealing connecting sleeve or cutting and separating a plurality of sealing connecting sleeves formed simultaneously, and trimming two end surfaces of each sealing connecting sleeve after separation.

Description

Sealing connection sleeve for pipelines and preparation method thereof Technical Field The invention relates to the technical field of pipeline manufacturing, in particular to a sealing connecting sleeve for pipelines and a preparation method thereof. Background In water supply and drainage engineering, the connection sealing of a large-caliber pipeline, such as a plastic pipeline with the diameter of more than phi 800cm, is difficult, and a special sealing connection device is often required for connection sealing. The Chinese patent with the patent number ZL202220894128.7 and the name of 'a pipeline connecting piece with good sealing property' disclosed in the 22 nd 07 th year 2022 comprises a first connecting pipe and a second connecting pipe, wherein a sealing component is movably arranged at one end of the opposite surfaces of the first connecting pipe and the second connecting pipe, the sealing component comprises a sealing pipe, the sealing pipe is movably arranged at one end of the opposite surfaces of the first connecting pipe and the second connecting pipe, and a communication hole is formed in the middle of the sealing pipe. When the rubber gasket is extruded at the two ends of the sealing pipe through the first connecting pipe and the second connecting pipe, the rubber gasket can be better attached to one ends of the first connecting pipe and the second connecting pipe under pressure to realize sealing, after sealing operation is completed, the movable ring is moved to the position of the regular polygon column, and the limiting hole is movably inserted into the surface of the regular polygon column, so that the regular polygon column is limited, namely, the threaded rod is prevented from rotating, and the situation that the tightness is reduced due to the fact that the threaded rod is prevented from loosening and reversely rotating is realized. Although this kind of connector can prevent the situation that the leakproofness from taking place, installation rate is slower, the cost of manufacture of connector is also higher. Another patent number ZL202023089291.6, named "HDPE winding pipe connection sealing structure" is disclosed in 2021, 10 and 22, which includes two winding pipes and socket pipe body sleeved between two adjacent openings of the winding pipes, where the inner walls of two ends of the socket pipe body are provided with clamping grooves along the periphery, the clamping grooves are embedded with sealing rings, the sealing rings partially extend out of the clamping grooves and are abutted against the outer walls of the winding pipes, the end surfaces of the sealing rings extending out of the clamping grooves are provided with continuous sealing tooth edges along the periphery, the outer walls of the winding pipes are provided with sealing tooth grooves matched with the sealing tooth edges along the periphery, and the sealing tooth edges are abutted against the sealing tooth grooves. The connecting sealing structure has the effect of improving the sealing performance between the spigot and socket pipe body and the two winding pipe bodies. The sealing ring with the connecting sealing structure is installed in the clamping groove on the inner wall of the socket pipe body in an embedded mode, the sealing tooth groove matched with the sealing tooth edge is required to be formed on the outer wall of the winding pipe body along the periphery, so that the sealing ring is easy to be shifted by the top of the end part of the winding pipe body, the sealing tooth edge and the sealing tooth groove are difficult to locate mutually, the installation difficulty is increased, and the problems of low installation speed and high installation cost are also caused. Disclosure of Invention The invention aims to solve the technical problem of providing a sealing connecting sleeve for pipelines, which has the advantages of high installation speed, low manufacturing cost and good sealing performance. In order to achieve the aim, the technical scheme is that the sealing connection sleeve for the pipelines comprises a rigid outer sleeve, wherein a limiting convex ring is arranged in the middle of the inner surface of the rigid outer sleeve, guide conical surfaces are arranged on the inner surface of the rigid outer sleeve close to two ends of the inner surface of the rigid outer sleeve, a rubber sealing inner sleeve is fixedly connected to the inner surface of the section of the rigid outer sleeve between the limiting convex ring and each guide conical surface, at least one deformable sealing convex ring is arranged on the inner surface of each rubber sealing inner sleeve, and the minimum inner diameter of the sealing convex ring before deformation is smaller than the outer diameter of the pipeline matched with the sealing convex ring; when the pipeline is connected, the end part of the pipeline is guided through the inner hole of the rubber sealing inner sleeve through the guide conical surface and simulta