CN218118937U

CN218118937U - Thermoplastic plastic composite pipe connecting joint structure

Info

Publication number: CN218118937U
Application number: CN202222542050.5U
Authority: CN
Inventors: 白勇; 刘文舒; 白强; 李均
Original assignee: Jiangsu Zhihai New Material R&d Co ltd
Current assignee: Jiangsu Zhihai New Material R&d Co ltd
Priority date: 2022-09-26
Filing date: 2022-09-26
Publication date: 2022-12-23
Anticipated expiration: 2032-09-26

Abstract

The utility model discloses a compound union coupling joint design of thermoplastic, including TCP, TCP pipe end joint, metal flange sleeve and metal seal ring. The annular bulge on the end surface of the single-side metal sealing ring of the utility model presses in and compresses the annular groove on the end surface of the joint of the TCP pipe end, and the metal flange sleeve is connected with other external pipe fittings through bolts, thereby realizing the connection of the TCP pipe and the pipe fittings, and having simple joint structure and convenient installation; annular bulges on two end surfaces of the double-sided metal sealing ring are respectively pressed into and tightly press annular grooves on end surfaces of end joints of two TCP pipes, and metal flange sleeves of the two TCPs are connected through bolts to realize TCP pipe-pipe connection; the inner diameter of the metal sealing ring of the utility model is consistent with the inner diameter of the TCP, the TCP joints are connected in an equal diameter way, the joints of the pipeline system have no local pressure loss, and the conveying efficiency of the pipeline system is improved; the utility model only has the metal sealing ring to contact the medium conveyed in the pipe, the interchangeability of the components is high, and the replacement is convenient; the metal flange sleeve and the metal sealing ring can be repeatedly used.

Description

Thermoplastic plastic composite pipe connecting joint structure

Technical Field

The utility model relates to a compound union coupling field especially relates to a compound union coupling joint design of thermoplastic.

Background

The Thermoplastic Composite Pipe (TCP for short) has the advantages of high strength, corrosion resistance, low cost and the like, and has wide application prospects in various fields of oil and gas transmission, mines, municipal administration and the like. TCP generally has a three-layer structure: the lining layer is generally made of high polymer materials, and the common materials comprise HDPE, PERT and the like; the reinforced layer is generally divided into a metal reinforced layer and a nonmetal reinforced layer, wherein the metal reinforced layer comprises various forms such as a belt, a wire and a mesh steel framework, and the nonmetal reinforced layer also comprises various forms such as a prepreg belt, a wire, a rope and a fiber bundle; the coating layer has the protection effects of UV resistance, corrosion resistance, scratch resistance and the like, and the material is often made of thermoplastic plastics such as HDPE and the like. The TCP additionally comprises a structural functional layer according to different use conditions, for example, a PVDF layer is added to the inner liner layer, a framework layer and a tensile armor layer are added to the reinforcing layer, and the like. The TCP joint is a key link of a composite pipe conveying system, the composite pipe joint widely applied at present is a metal buckling and pressing joint, but the joint structure is not reusable, and the phenomenon of pipe diameter reduction exists at the joint, so that the conveying efficiency of a TCP pipeline system is reduced.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model discloses a compound union coupling joint design of thermoplastic, the purpose is to realize TCP pipe-union coupling and pipe-pipe fittings connection to connect and can use repeatedly many times, and realize pipeline "constant diameter" at TCP joint department and connect, improve TCP pipe-line system's transport efficiency.

The utility model adopts the following technical scheme:

the utility model provides a compound union coupling joint structure of thermoplastic plastic, includes TCP, TCP pipe end joint, metal flange sleeve and metal sealing ring, TCP and TCP pipe end joint structure as an organic whole, and the pipe end of TCP pipe end joint has certain length in TCP axial direction, and the pipe end external diameter of TCP pipe end joint is greater than the TCP external diameter, and TCP pipe end joint terminal surface is provided with annular groove, and metal flange sleeve cup joints outside TCP pipe end joint, and metal flange sleeve one end is equipped with the bolt hole, and the internal diameter of metal flange sleeve is unanimous with the external diameter of TCP pipe end joint pipe end, and the other end of metal flange sleeve is provided with the step in the axial direction, the internal diameter of step is unanimous with the TCP external diameter, and the step department supports the pipe end that compresses tightly TCP pipe end joint, and TCP pipe end joint terminal surface extrusion contact has the metal sealing ring, and the internal diameter of metal sealing ring is unanimous with the TCP internal diameter, is provided with annular arch on the terminal surface of metal sealing ring, the shape and the size of annular arch with the annular groove cooperation that the pipe end joint terminal surface set up.

Preferably, the metal sealing ring is a single-sided metal sealing ring or a double-sided metal sealing ring, the end face of one end of the single-sided metal sealing ring is provided with an annular bulge for connecting the TCP tube and the pipe fitting, and the end faces of two ends of the double-sided metal sealing ring are respectively provided with an annular bulge for connecting the TCP tube and the pipe.

Preferably, the cross-sectional shapes of the annular protrusion and the annular groove are circular arc shapes matched with each other.

Preferably, the TCP and the TCP pipe end joint are integrally injection-molded by an injection mold.

Preferably, the TCP includes a TCP cladding layer, a TCP enhancement layer, and a TCP lining layer.

Preferably, the annular groove is arranged at the center of the end face of the end joint of the TCP pipe.

Preferably, the outer diameter of the metal sealing ring is smaller than the inner diameter of the metal flange sleeve.

The utility model has the advantages that: (1) The annular bulge on the end surface of the single-side metal sealing ring of the utility model presses in and compresses the annular groove on the end surface of the joint of the TCP pipe end, and the metal flange sleeve is connected with other external pipe fittings through bolts, so that the connection of the TCP pipe and the pipe fittings is realized, the joint structure is simple, and the installation is convenient; annular bulges on two end surfaces of the double-sided metal sealing ring are respectively pressed into and tightly press annular grooves on end surfaces of end joints of two TCP pipes, and metal flange sleeves of the two TCPs are connected through bolts to realize TCP pipe-pipe connection; (2) The inner diameter of the single (double) surface metal sealing ring of the utility model is consistent with the inner diameter of the TCP, the TCP joints are connected in an equal diameter way, the joints of the pipeline system have no local pressure loss, and the conveying efficiency of the pipeline system is improved; (3) The utility model has only single (double) surface metal sealing ring to contact the conveying medium in the pipe, the interchangeability of the components is high, and the replacement is convenient; the metal flange sleeve and the single (double) surface metal sealing ring can be repeatedly used.

Drawings

FIG. 1 is a schematic view of injection molding of a TCP pipe end fitting according to the present invention;

FIG. 2 is a schematic structural view of a TCP pipe end joint according to the present invention;

FIG. 3 is a schematic view of the connection structure of TCP pipe and pipe fitting of the present invention;

FIG. 4 is a schematic view of a TCP tube-tube connection structure according to the present invention;

in the figure: 1. TCP,11, a TCP coating layer, 12, a TCP reinforcing layer, 13, a TCP lining layer, 2, a pipe end joint injection mold, 21, an injection mold gate, 22, an upper half injection mold, 23, a lower half injection mold, 3, a TCP pipe end joint, 3A, a TCP pipe end joint, 3B, a TCP pipe end joint, 31, a TCP pipe end joint pipe end, 32, an annular groove, 32A, an annular groove, 32B, an annular groove, 4, a metal flange sleeve, 4A, a metal flange sleeve, 4B, a metal flange sleeve, 41, a metal flange sleeve step, 42, a bolt hole, 42A, a bolt hole, 42B, a bolt hole, 5, a single-sided metal sealing ring, 51, an annular bulge, 6, a double-sided metal sealing ring, 61, an annular bulge A,62 and an annular bulge B.

Detailed Description

The technical solution of the present invention is further described in detail by the following specific embodiments in combination with the accompanying drawings:

example 1: as shown in fig. 3 and 4, a joint structure of a thermoplastic composite pipe comprises a TCP1, a TCP pipe end joint 3, a metal flange sleeve 4, a single-sided metal sealing ring 5, a double-sided metal sealing ring 6, and a TCP1, wherein the TCP1 comprises a TCP coating layer 11, a TCP reinforcing layer 12 and a TCP lining layer 13.

As shown in fig. 2, the TCP pipe end joint 3 of the present invention is manufactured by plastic injection molding, and the plastic injection molding process is as shown in fig. 1, wherein the pipe end joint injection mold 2 is composed of an upper injection mold 22 and a lower injection mold 23 by assembling. And (3) loading the TCP1 into a pipe end joint injection mold 2, enabling molten plastic to flow into a cavity of the pipe end joint injection mold 2 from a sprue 21 of the injection mold through external extrusion equipment, completing injection, cooling and demolding to obtain the TCP pipe end joint 3 shown in the figure 2.

The utility model provides a one of them TCP connects connected mode is TCP pipe-pipe fittings and connects, as shown in figure 3: the step 41 of the metal flange sleeve 4 is tightly attached to one end of the TCP pipe end joint pipe end 31, the annular bulge 51 of the single-sided metal sealing ring 5 is pressed into the TCP pipe end joint annular groove 32, the metal flange sleeve 4 is connected with an external pipe fitting through the bolt hole 42, the annular bulge 51 of the single-sided metal sealing ring is tightly pressed on the TCP pipe end joint annular groove 32 through a fastening bolt, and then the TCP pipe-pipe fitting connection is achieved.

The utility model provides a another TCP connects connected mode is TCP pipe-pipe connection, as shown in fig. 4: the metal flange sleeves 4A and 4B are respectively arranged on the

end joints

3A and 3B of the TCP pipe, the annular bulge A61 and the annular bulge B62 of the double-sided metal sealing ring 6 are respectively pressed into the

annular grooves

32A and 32B of the end face of the end joint of the TCP pipe, the metal flange sleeves 4A and 4B are fastened by bolts through the

bolt holes

42A and 42B until the annular bulge A61 and the annular bulge B62 of the double-sided metal sealing ring 6 respectively press the

annular grooves

32A and 32B of the end face of the end joint of the TCP pipe, and the TCP pipe-pipe connection is realized

The utility model relates to a compound union coupling joint structure of thermoplastic plastic is used for TCP pipe-pipe fittings to connect, specifically uses the step as follows:

(1) Firstly, a metal flange sleeve 4 is arranged into a TCP, wherein one end of a flange of the metal flange sleeve faces the direction of a TCP pipe orifice, as shown in figure 3;

(2) As shown in fig. 1, placing a TCP1 into an injection mould 2, allowing external molten plastic to flow into a cavity of the injection mould 2 through a gate of the injection mould, cooling the injection mould 2 after injection is completed, and demoulding to obtain a TCP end fitting 3 shown in fig. 2;

(3) As shown in fig. 3, the step 41 of the metal flange sleeve 4 is tightly attached to one side of the TCP end fitting, and the annular protrusion 51 of the single-sided metal sealing ring 5 is pressed into the annular groove 32 of the TCP end fitting;

(4) The metal flange sleeve 4 is connected with external pipe fittings and equipment through bolt holes 42 by bolts, the annular bulge 51 of the single-sided metal sealing ring 5 is tightly pressed on the annular groove 32 of the TCP pipe end joint through fastening bolts, a torque wrench is used for carrying out bolt fastening, and joint installation is completed when the torque force reaches the preset value of the torque wrench, wherein the preset value of the torque force of the torque wrench is calculated according to the material property of TCP pipe end joint plastic.

The utility model relates to a compound union coupling joint design of thermoplastic is used for TCP pipe-union coupling, specifically uses the step as follows:

(2) As shown in fig. 1, placing a TCP1 into an injection mold 2, allowing external molten plastic to flow into a cavity of the injection mold 2 through a gate of the injection mold, cooling the injection mold 2 after injection is completed, and demolding to obtain a TCP end fitting 3A shown in fig. 2;

(3) Repeating the steps (1) to (2) to obtain a TCP pipe end joint 3B;

(4) Pressing the annular protrusion A61 and the annular protrusion B62 of the double-sided metal sealing ring 6 into the

annular grooves

32A and 32B of the end face of the TCP pipe end joint respectively, as shown in FIG. 4;

(5) The metal flange sleeve 4A is connected with the metal flange sleeve 4B through the bolt hole 42A by adopting a bolt, the annular protrusion A61 and the annular protrusion B62 of the double-sided metal sealing ring 6 are enabled to respectively press the

annular grooves

32A and 32B on the end face of the TCP pipe end joint through fastening bolts, a torque wrench is used for fastening the bolts, and the joint is installed when the torque force reaches the preset value of the torque wrench, wherein the preset value of the torque force of the torque wrench is calculated according to the material property of TCP pipe end joint plastic.

The above-described embodiments are only preferred embodiments of the present invention, and are not intended to limit the present invention in any way, and other variations and modifications may be made without departing from the scope of the claims.

Claims

1. A thermoplastic plastic composite pipe connecting joint structure is characterized by comprising a Transmission Control Protocol (TCP), a Transmission Control Protocol (TCP) pipe end joint, a metal flange sleeve and a metal sealing ring, wherein the TCP and the TCP pipe end joint are of an integral structure, a pipe end of the TCP pipe end joint is of a certain length in the axial direction of the TCP, the outer diameter of the pipe end of the TCP pipe end joint is larger than that of the TCP, an annular groove is formed in the end face of the TCP pipe end joint, the metal flange sleeve is sleeved outside the TCP pipe end joint, a bolt hole is formed in one end of the metal flange sleeve, the inner diameter of the metal flange sleeve is consistent with the outer diameter of a pipe end of the TCP pipe end joint, a step is arranged at the other end of the metal flange sleeve in the axial direction, the inner diameter of the step is consistent with the outer diameter of the TCP, the pipe end of the TCP pipe end joint is abutted against and pressed against the pipe end of the TCP pipe end joint, the metal sealing ring is in pressing contact with the inner diameter of the metal sealing ring, an annular bulge is arranged on the end face of the metal sealing ring, and the shape and size of the annular groove are matched with the end face of the TCP pipe end joint.

2. The connecting joint structure of thermoplastic composite pipe as claimed in claim 1, wherein the metal sealing ring is a single-sided metal sealing ring or a double-sided metal sealing ring, the single-sided metal sealing ring has a ring-shaped protrusion on one end surface for connecting the TCP pipe and the pipe, and the double-sided metal sealing ring has a ring-shaped protrusion on the end surfaces of the two ends for connecting the TCP pipe and the pipe.

3. The thermoplastic composite pipe coupling joint structure of claim 2, wherein the cross-sectional shapes of the annular protrusion and the annular groove are circular arcs that match each other.

4. The thermoplastic composite pipe coupling joint structure of claim 1, wherein the TCP and the TCP end fittings are integrally injection molded by an injection mold.

5. The joint structure of claim 1, wherein the TCP comprises a TCP coating layer, a TCP reinforcing layer and a TCP lining layer.

6. The thermoplastic composite pipe coupling joint structure of claim 1, wherein said annular groove is provided at a central position of the end face of the end fitting of the TCP.

7. The thermoplastic composite pipe coupling joint structure of claim 1, wherein said metal sealing ring has an outer diameter less than an inner diameter of said metal flanged sleeve.