CN217736589U

CN217736589U - High pressure resistant pipeline sealing joint

Info

Publication number: CN217736589U
Application number: CN202221032848.9U
Authority: CN
Inventors: 杨明昆
Original assignee: Gongqing Chengrui Titanium Pipeline Technology Co ltd
Current assignee: Gongqing Chengrui Titanium Pipeline Technology Co ltd
Priority date: 2022-04-29
Filing date: 2022-04-29
Publication date: 2022-11-04
Anticipated expiration: 2032-04-29

Abstract

The utility model relates to a pipe seal connects technical field, especially relates to a high pressure resistant pipe seal connects. A high-pressure resistant pipeline sealing joint which improves creep resistance and prevents displacement between a pipeline and an externally coated metal sleeve. The utility model provides a high pressure resistant pipeline sealing joint, includes the pipeline and covers the metal covering outward, the inner wall processing that covers the metal covering outward has the internal tooth line, and the outer wall of pipeline and the interior wall compression interlock of metal covering outward, the connector tip that covers the metal covering outward opens has the recess chamber that holds pipeline turn-ups portion, and recess chamber bottom is opened there is the concave groove line. The inner wall of the end part of the pipeline, which is externally coated with the metal sleeve, is processed with internal threads to strengthen the meshing force, and the flanging part of the pipeline is pressed in the groove cavity of the externally coated metal sleeve and is tightly meshed with the groove threads, thereby being beneficial to improving the creep resistance of the joint.

Description

High pressure resistant pipeline sealing joint

Technical Field

The utility model relates to a pipe seal connects technical field, especially relates to a high pressure resistant pipe seal connects.

Background

The existing high-pressure resistant pipeline sealing connector is usually provided with: 1) The outer side of the joint of the pipeline port is coated with a metal sleeve and is tightly pressed, the axial tensile strength of the joint of the pipeline is not high by the sealing connection structure, and the sealing connection structure is damaged and fails due to expansion of the pipeline under the high-pressure state in the pipeline; 2) Two pipeline ports are connected through a metal pipe threaded connector, the two pipeline ends are required to be fixed and uniformly screwed by using a special tool, the operation is very difficult, and the later maintenance and the disassembly and the assembly are inconvenient; in addition, the joint of the pipe is subject to high temperature to generate stress creep and expand with heat and contract with cold to displace with the metal sleeve pipe coated outside, which causes the leakage of the joint.

Therefore, how to design a high-pressure-resistant pipeline sealing connection structure which can improve the creep resistance and prevent the displacement between the pipeline and the metal sleeve coated outside is a technical problem which needs to be solved urgently by the personnel in the field.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects that the axial tensile strength of the sealing connection structure at the joint of the pipelines is not high, the high temperature generates stress creep and the displacement occurs, the technical problem to be solved is as follows: the high-pressure-resistant pipeline sealing joint has the advantages that the creep resistance is improved, and the pipeline and the outer covering metal sleeve are prevented from displacing.

The technical scheme is as follows: a high pressure resistant pipeline sealing joint comprises a pipeline and an externally coated metal sleeve, and is characterized in that internal threads are processed on the inner wall of the externally coated metal sleeve, the outer wall of the pipeline is tightly pressed and occluded with the inner wall of the externally coated metal sleeve, a groove cavity for accommodating a flanging part of the pipeline is formed in the end part of a connector of the externally coated metal sleeve, and concave grooves are formed in the bottom of the groove cavity;

furthermore, an axial tensile member and an annular tensile member are arranged in the pipeline, and the axial tensile member extends along the axial direction of the pipe body and is annularly distributed in the pipe body for bearing the axial tensile force of the pipe body; the hoop tensile member is spirally wound in the pipe body and used for bearing the hoop expansion hydraulic pressure of the pipe body, the axial tensile member is one of a steel wire, a glass fiber rope or a glass fiber belt, and the hoop tensile member is the steel wire, the glass fiber rope or the glass fiber belt.

Furthermore, the end part of the interface of the pipeline, which is externally coated with the metal sleeve, is subjected to external force to form a flanging, and the flanging part of the pipeline is pressed in the groove cavity and is tightly meshed with the groove grains.

Further, the pipeline contains outer plastic layer and inlayer plastic layer, outer plastic layer is outside the inlayer plastic layer, be provided with in the inlayer plastic layer axial tensile piece, axial tensile piece coats on the surface has the one deck hot melt adhesive, be provided with one deck hot melt adhesive layer between outer plastic layer and the inlayer plastic layer, be provided with among the hot melt adhesive layer hoop tensile piece.

The pipeline is characterized by further comprising a sealing gasket, wherein the sealing gasket is arranged on the end face of the flanging part of the pipeline, and a steel ring is arranged in the center of the inside of the sealing gasket; the outer end part of the outer covering metal sleeve is provided with a flange sheet, and the two outer covering metal sleeves are connected under the mutual matching of the flange sheet and the bolt.

Furthermore, the plastic plate also comprises a functional plastic layer arranged in the inner plastic layer, wherein the functional plastic layer is a polyolefin elastomer or an ultrahigh molecular weight polyethylene plastic.

The utility model has the advantages that: 1. the inner wall of the end part of the pipeline, which is externally coated with the metal sleeve, is processed with internal threads to strengthen the meshing force, and the flanging part of the pipeline is pressed in the groove cavity of the externally coated metal sleeve and is tightly meshed with the groove threads, thereby being beneficial to improving the creep resistance of the joint.

2. The flange sheet is connected with the bolt in a matching way, and has the advantages of high connection speed, convenience in disassembly and high tensile strength.

3 under the effect that compresses tightly of flange piece and bolt, through the sealed pad that has the steel ring, further improve the turn-ups portion of pipeline and the gripping power of covering the metallic sheath indent fluted outward, avoid the pipeline because of expend with heat and contract with cold and take place the displacement with covering the metallic sheath outward, structural design is reasonable, is showing the life who improves whole connecting piece.

Drawings

Fig. 1 is a schematic view of the three-dimensional structure of the present invention.

Fig. 2 is a sectional view of the three-dimensional structure of the present invention.

Fig. 3 is a schematic diagram of a first partial body structure according to the present invention.

Fig. 4 is a schematic cross-sectional view of the metal sheath of the present invention.

Fig. 5 is a schematic sectional view of the gasket of the present invention.

Fig. 6 is a schematic view of the cross-sectional structure of the pipeline of the present invention.

In the above drawings: 1: pipe, 11: outer plastic layer, 12: inner plastic layer, 13: axial steel wire, 14: hot melt adhesive, 15: hot melt adhesive layer, 16: circumferential steel wire, 2: outer coated metal sleeve, 201: internal insection, 202: groove line, 3: gasket, 301: steel ring, 4: a flange plate.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Example 1

As shown in fig. 1-4, a high pressure resistant pipe sealing joint comprises a pipe 1 and an outer coated metal sleeve 2, wherein inner threads 201 are processed on the inner wall of the outer coated metal sleeve 2, the outer wall of the pipe 1 is pressed and engaged with the inner wall of the outer coated metal sleeve 2, a groove cavity for accommodating a flanging part of the pipe 1 is formed at the joint end part of the outer coated metal sleeve 2, and grooves 202 are formed at the bottom of the groove cavity.

The body 1 contains outer plastic layer 11 and inlayer plastic layer 12, and outer plastic layer 11 is provided with axial steel wire (also can use glass fiber rope or glass fiber band) 13 in the inlayer plastic layer 12 outside being in inlayer plastic layer 12, and axial steel wire (or glass fiber rope, glass fiber band) 13 is the annular along body axial extension and distributes in the body for bear 1 axial pulling force of body. The surface of the axial steel wire (or the glass fiber rope or the glass fiber belt) 13 is coated with a layer of hot melt adhesive 14. A hot melt adhesive layer 15 is arranged between the outer plastic layer 11 and the inner plastic layer 12, a hoop steel wire (or a glass fiber rope or a glass fiber belt) 16 is arranged in the hot melt adhesive layer 15, and the hoop steel wire (or the glass fiber rope or the glass fiber belt) 16 is spirally wound in the pipe body and used for bearing the hoop expansion hydraulic pressure of the pipe body. The pipe body can be manufactured according to the process method described in the patent CN 108032504A.

The pipe 1 is flanged under the action of external force at the end part of the interface of the outer coated metal sleeve 2, and the flanged part of the pipe 1 is pressed in the groove cavity and is tightly meshed with the groove grains 202.

Traditional 1 sealing connection department of pipeline adopts plastics electric melting method, hot melt method or welding method to seal and reinforcement processing usually, but adopts the connection structure of above-mentioned traditional mode reinforcement processing, still can not fine solution plastic tubing junction because of high temperature produces stress creep to and expend with heat and contract with cold and take place the problem of displacement with outer 2 tubings of metal covering, often is that revealing of junction leads to whole connection structure to become invalid. The utility model discloses improve pipeline 1 and outer 2 sealing connection departments of cover metal sleeve, the inner wall processing that covers metal sleeve 2 outside 1 tip of pipeline has internal tooth line 201, strengthens pipeline 1's outer wall and covers 2 inner wall interlock dynamics of metal sleeve outward. The end part of the metal sleeve 2 is coated by a special tool to carry out flanging process operation on the extended pipeline 1, and the flanging part of the pipeline 1 is pressed in the groove cavity of the metal sleeve 2 coated outside and is tightly meshed with the groove grains 202, so that the creep resistance of the joint is improved.

Example 2

As shown in fig. 3, 5 and 6, based on embodiment 1, the pipe joint further includes a gasket 3, the gasket 3 is disposed on the end face of the flanging portion of the pipe 1, and a steel ring 301 is disposed in the center of the gasket 3; the outer end part of the flange piece 4 and the outer covering metal sleeve 2 is provided with the flange piece 4, and the two outer covering metal sleeves 2 are connected under the mutual matching of the flange piece 4 and the bolt.

On the other hand, the connection between two pipelines 1 adopts flange and bolt to mutually cooperate and connect, have that the connection speed is fast, dismantle convenient, serial advantages such as tensile strength height, be provided with sealed 3 on the turn-ups part terminal surface of outer cladding metal covering 2 and pipeline 1, sealed 3 inside center department of filling up is provided with steel ring 301, can compress tightly fixedly the turn-ups position of pipeline 1 under the fastening of flange and spiral shell, further improve the grip of the turn-ups portion of pipeline 1 and the interior recess flute 202 of outer cladding metal covering 2, avoid pipeline 1 because of expend with heat and contract with cold and take place the displacement with outer cladding metal covering 2, structural design is reasonable, show the life who improves the whole connecting piece.

The composite material is characterized by also comprising a functional plastic layer arranged in the inner plastic layer, wherein the functional plastic layer is a polyolefin elastomer or an ultrahigh molecular weight polyethylene plastic, so that the wear resistance is improved.

Although embodiments of the present invention have been shown and described, it would be appreciated by those skilled in the art that changes may be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the claims and their equivalents.

Claims

1. The utility model provides a high pressure resistant pipeline sealing joint, is including the pipeline with cover the metal covering outward, its characterized in that, the inner wall processing that covers the metal covering outward has the internal tooth line, the outer wall of pipeline and the interior wall compression interlock of cover the metal covering outward, the interface tip that covers the metal covering outward opens has the recess chamber that holds pipeline turn-ups portion, recess chamber bottom is opened has the concave groove line.

2. The high pressure resistant pipeline sealing joint as claimed in claim 1, wherein an axial tension member and a circumferential tension member are disposed in the pipeline, the axial tension member is annularly distributed in the pipeline along the axial extension of the pipeline for bearing the axial tension of the pipeline; the hoop tensile member is spirally wound in the pipe body and used for bearing the hoop expansion hydraulic pressure of the pipe body, the axial tensile member is one of a steel wire, a glass fiber rope or a glass fiber belt, and the hoop tensile member is the steel wire, the glass fiber rope or the glass fiber belt.

3. The high pressure resistant pipe sealing joint of claim 2, wherein the pipe is flanged under external force at the joint end of the metal sheath, and the flanged portion of the pipe is pressed in the groove cavity and tightly engaged with the groove pattern.

4. The high pressure resistant pipeline sealing joint of claim 2, wherein the pipeline comprises an outer plastic layer and an inner plastic layer, the outer plastic layer is positioned outside the inner plastic layer, the inner plastic layer is provided with the axial tensile member, the surface of the axial tensile member is coated with a layer of hot melt adhesive, a layer of hot melt adhesive layer is arranged between the outer plastic layer and the inner plastic layer, and the annular tensile member is arranged in the hot melt adhesive layer.

5. The high-pressure resistant pipeline sealing joint as claimed in claim 3, further comprising a sealing gasket, wherein the end face of the flanging part of the pipeline is provided with the sealing gasket, and a steel ring is arranged at the center inside the sealing gasket; the outer end part of the outer covering metal sleeve is provided with a flange sheet, and the two outer covering metal sleeves are connected under the mutual matching of the flange sheet and the bolt.

6. The high pressure resistant pipeline sealing joint as claimed in claim 3, further comprising a functional plastic layer disposed in the inner plastic layer, wherein the functional plastic layer is a polyolefin elastomer or an ultra-high molecular weight polyethylene plastic.