CN216479411U - Composite pipe is with big latus rectum withhold connection structure - Google Patents
Composite pipe is with big latus rectum withhold connection structure Download PDFInfo
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- CN216479411U CN216479411U CN202122439349.3U CN202122439349U CN216479411U CN 216479411 U CN216479411 U CN 216479411U CN 202122439349 U CN202122439349 U CN 202122439349U CN 216479411 U CN216479411 U CN 216479411U
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Abstract
The utility model discloses a large-drift-diameter buckling and pressing connection structure for a composite pipe, which comprises a pipe core pipe, a pipe sleeve, a pipe tail clamping sleeve and the composite pipe, wherein the pipe core pipe and the bottom of the pipe sleeve are connected into a whole to form an annular cavity structure, the end part of the pipe core pipe is a conical surface, the outer diameter of the pipe tail clamping sleeve is reduced from inside to outside, the outer diameter of the end part is slightly smaller than the inner diameter of the composite pipe, two tooth forms are arranged on the inner wall of the annular cavity structure, the tooth form close to the end part is shallow and is provided with an inclined surface, the outer diameter of the tooth form part of the pipe core pipe is larger than the inner diameter of the composite pipe, and the pipe tail clamping sleeve is a lockable clamping structure and is arranged at the end part of the pipe sleeve and is used for restraining and pressing the outer layer of the composite pipe of the pipe part. The utility model realizes flaring of the end part of the composite pipe in the process of sleeving the pipe, reduces the necking caused by the influence of the wall thickness of the pipe, realizes the consistency of the inner diameter of the pipe and the inner diameter of the pipeline in the process of compressing the pipe by the internal expanding machine, and has the advantages of large diameter of the pipe, reliable connection strength, convenient connection construction and the like.
Description
Technical Field
The utility model belongs to the technical field of composite pipe connection, and particularly relates to a large-drift-diameter buckling and pressing connection structure for a composite pipe.
Background
The composite pipe is widely applied to petroleum and natural gas transportation at present. In the field of oil fields, the conventional electric melting and hot melting connection strength is insufficient due to complex working conditions and high working pressure of the oil field. Therefore, the connection mode in the high-pressure field in the oil field is almost metal pipe buckling, although the strength is reliable, the problem that the diameter of the connection part is reduced due to the wall thickness of the buckling pipe and the buckling amount of the buckling pipe in the connection mode can cause the diameter of the whole pipeline system to be inconsistent, scaling and blockage at the diameter reducing part are easy to occur, and the pipeline is cleaned by passing balls regularly almost every month. The utility model patent CN201720056780.0 gives a seal structure of metal connecting pipe for plastic composite pipe, and this pipe just has above-mentioned problem, causes the very serious undergauge of pipeline. Therefore, it is desirable to design a large-diameter buckling connection structure for a composite pipe to solve the above problems in the prior art.
SUMMERY OF THE UTILITY MODEL
Aiming at the problems, the utility model provides a large-diameter buckling and pressing connection structure for a composite pipe, which realizes flaring of the end part of the composite pipe in the process of sleeving the composite pipe and reduces the diameter reduction caused by the influence of the wall thickness of the pipe fitting. And then, in the process of compressing the pipe fitting by an internal expanding machine, the inner diameter of the pipe fitting is consistent with that of the pipeline. Compared with the existing connection mode, the pipe fitting connecting device has the advantages of large drift diameter, reliable connection strength, convenience in connection construction and the like.
In order to achieve the purpose, the utility model adopts the technical scheme that:
a large-drift-diameter buckling and pressing connection structure for a composite pipe comprises a pipe core pipe, a pipe sleeve, a pipe tail clamping sleeve and the composite pipe, the pipe fitting core pipe and the bottom of the pipe fitting sleeve are fixedly connected into a whole to form an annular cavity structure, the composite pipe is inserted into the annular cavity structure, the end part of the pipe fitting core pipe is a conical surface, the outer diameter size of the pipe fitting core pipe is gradually reduced from inside to outside, the outer diameter size of the end part is slightly smaller than the inner diameter of the composite pipe, the inner wall of the annular cavity structure is provided with two tooth forms, the tooth form of the pipe fitting core pipe close to the end part is shallow, the tooth form of the pipe fitting core pipe close to the bottom part is provided with an inclined plane, the tooth form of the pipe fitting core pipe close to the bottom part is deep, the outer diameter size of the tooth form of the pipe fitting core pipe is larger than the inner diameter of the composite pipe, the pipe tail clamping sleeve is a lockable clamping structure and is arranged at the end part of the pipe fitting sleeve and used for restraining and buckling the outer layer of the composite pipe of the pipe fitting part.
Furthermore, the pipe fitting core pipe and the bottom of the pipe fitting sleeve are welded together in an electric welding mode.
Further, lockable clamping structure comprises two even symmetrical arc cutting ferrule, and two arc cutting ferrule carry out fixed connection through the bolt.
Furthermore, the inner wall of the arc-shaped cutting sleeve is provided with a trapezoidal tooth shape, and the joint surface of the two arc-shaped cutting sleeves is provided with a fillet processing structure.
Still further, the whole length of the pipe fitting sleeve is smaller than that of the pipe fitting core pipe.
Furthermore, the sum of the lengths of the pipe tail clamping sleeve and the pipe fitting sleeve is slightly larger than the length of the pipe fitting core pipe.
Advantageous effects
According to the technical scheme, flaring of the end part of the composite pipe is realized in the process of sleeving the pipe fitting, reducing diameter shrinkage caused by the influence of the wall thickness of the pipe fitting is reduced, and the inner diameter of the pipe fitting is consistent with that of a pipeline in the process of mechanically compressing the pipe fitting by means of internal expansion.
Drawings
FIG. 1 is a cross-sectional view of a composite pipe joint according to the present invention;
FIG. 2 is a perspective view of the composite pipe joint structure of the present invention;
FIG. 3 is a schematic view of a tube tail ferrule of the present invention;
FIG. 4 is a schematic view of the tooth-shaped structure of the core tube and sleeve of the pipe fitting of the present invention;
in the figure: 1. a pipe fitting core pipe; 2. a tubing sleeve; 3. a pipe tail sleeve is sleeved; 31. a fillet processing structure; 32. a trapezoidal tooth shape; 4. and (4) compounding the pipes.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is to be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1 and 2, a large-bore buckling and pressing connection structure for a composite pipe mainly comprises a pipe core pipe 1, a pipe sleeve 2, a pipe tail clamping sleeve 3 and a composite pipe 4. The bottom ends of the pipe fitting core pipe 1 and the pipe fitting sleeve 2 are fixedly connected together to form an annular cavity structure. In this embodiment, the pipe fitting sleeve 2 and the pipe fitting core tube 1 are welded together by electric welding, and other methods for fixedly connecting the two parts in the prior art can be used. The composite pipe 4 is inserted into the annular cavity structure. The pipe tail clamping sleeve 3 is of a lockable clamping structure, is arranged at the end part of the pipe fitting sleeve 2 and is used for restraining and pressing the outer layer of the composite pipe of the pipe fitting part. Preferably, in the utility model, the whole length of the pipe fitting sleeve 2 is smaller than that of the pipe fitting core pipe 1, so that the sleeving process of the composite pipe 4 is facilitated, and the sum of the lengths of the pipe tail clamping sleeve 3 and the pipe fitting sleeve 2 is slightly larger than that of the pipe fitting core pipe 1.
The outer diameter of the end part of the pipe fitting core pipe 1 is smaller than the inner diameter of the composite pipe 4, so that the composite pipe 4 can be conveniently sleeved and positioned, and the core pipe and the composite pipe are ensured to be concentric. The end part of the pipe fitting core pipe 1 is a conical surface, the outer diameter size gradually decreases from inside to outside, two tooth forms (as shown in figure 4) are arranged on the inner wall of the annular cavity structure (namely the outer surface of the pipe fitting core pipe and the inner surface of the pipe fitting sleeve), the tooth form of the pipe fitting core pipe 1 close to the end part is shallow, and an inclined plane is arranged, so that the stress is not easy to concentrate, the connection is more reliable, the tooth form close to the bottom section is deeper, and the combination is firmer, the outer diameter size of the tooth form part of the pipe fitting core pipe 1 is larger than the inner diameter of the composite pipe 4, namely, the end part flaring of the composite pipe 4 is realized in the process of sleeving (the pipe fitting core pipe is stuffed into the composite pipe), and the inner diameter of the composite pipe 4 is expanded to the outer diameter of the pipe 1;
as shown in fig. 3, the pipe tail cutting sleeve 3 is composed of two arc-shaped cutting sleeves which are symmetrical uniformly, and the two arc-shaped cutting sleeves are clamped and fixed through bolts, so that the buckling connection of the composite pipe 4 and the pipe fitting core pipe 1 is further locked. The joint surface of the two arc-shaped cutting sleeves is provided with a fillet processing structure 31, so that the outer layer of the composite pipe is prevented from being crushed in the locking process of the pipe tail cutting sleeve. The inner wall of the arc-shaped cutting sleeve is provided with a trapezoidal tooth shape, and the arc-shaped cutting sleeve is clamped at the end part of the pipe fitting sleeve. The sum of the lengths of the pipe tail clamping sleeve 3 and the pipe fitting sleeve 2 is slightly larger than the length of the pipe fitting core pipe 1, and the outer layer of the composite pipe of the pipe fitting part is restrained and buckled, so that the mechanical property of the composite pipe 4 is prevented from being damaged by the flaring and internal expansion processes of the pipe fitting core pipe 1. The pipe tail cutting sleeve 3 can integrally improve the strength of the joint.
It should be noted that the structure of the pipe tail cutting ferrule of the present invention is not limited to the structure shown in fig. 3 of the present embodiment, and other lockable clamping structures can be applied to the present invention.
According to the structure, when the pipe fitting core pipe and the pipe fitting sleeve are connected and installed, the bottom of the pipe fitting core pipe and the bottom of the pipe fitting sleeve are welded into a whole in an electric welding mode, the composite pipe is plugged into an annular cavity between the pipe fitting core pipe and the pipe fitting sleeve, the pipe tail clamping sleeve is locked, and finally the mounting of the flared pipe fitting is completed through internal expansion, so that the inner diameter of a connection part is consistent with the inner diameter of a pipeline. The internal expansion operation is that the internal expansion head is pulled to the end part from the inside of the pipe fitting through the oil cylinder, and the external diameter of the internal expansion head is larger than the internal diameter of the core pipe of the pipe fitting, so that the external expansion of the core pipe is realized, and the pipe is clamped.
Claims (6)
1. The utility model provides a connection structure is withheld to big latus rectum for composite pipe, a serial communication port, including pipe fitting core pipe (1), pipe fitting sleeve (2), pipe tail cutting ferrule (3) and composite pipe (4), pipe fitting core pipe (1) and pipe fitting sleeve (2) bottom fixed connection are as an organic whole, form the annular cavity structure, in the annular cavity structure is pegged graft to composite pipe (4), the tip of pipe fitting core pipe (1) is a conical surface, and external diameter diminishes from inside to outside gradually, and tip external diameter slightly is less than composite pipe (4) internal diameter, be equipped with two kinds of tooth types on the inner wall of annular cavity structure, the tooth type that pipe fitting core pipe (1) is close to the tip is shallower, is equipped with the inclined plane, and the tooth type that is close to the bottom is darker, the external diameter size of pipe fitting core pipe (1) tooth type department is greater than composite pipe (4) internal diameter, realizes the flaring to composite pipe end in-process that pipe fitting core pipe is stuffed in, the pipe tail clamping sleeve (3) is a lockable clamping structure, is arranged at the end part of the pipe fitting sleeve (2) and is used for restraining and buckling the outer layer of the composite pipe of the pipe fitting part.
2. The large-diameter buckling-pressing connection structure for the composite pipe as claimed in claim 1, wherein the pipe core tube (1) and the bottom of the pipe sleeve (2) are welded together by means of electric welding.
3. The large-diameter buckling and pressing connection structure for the composite pipe as claimed in claim 1, wherein the lockable clamping structure is composed of two arc-shaped clamping sleeves which are uniformly symmetrical and fixedly connected through a bolt.
4. The large-drift-diameter buckling and pressing connecting structure for the composite pipe as claimed in claim 3, wherein the inner wall of the arc-shaped cutting sleeve is provided with a trapezoidal tooth form (32), and the joint surface of the two arc-shaped cutting sleeves is provided with a fillet processing structure (31).
5. The large-drift-diameter buckling-pressing connection structure for the composite pipe as claimed in claim 1, wherein the overall length of the pipe sleeve (2) is smaller than that of the pipe core tube (1).
6. The large-drift-diameter buckling and pressing connection structure for the composite pipe as claimed in claim 1, wherein the sum of the lengths of the pipe tail cutting ferrule (3) and the pipe sleeve (2) is slightly larger than the length of the pipe core pipe (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122439349.3U CN216479411U (en) | 2021-10-11 | 2021-10-11 | Composite pipe is with big latus rectum withhold connection structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122439349.3U CN216479411U (en) | 2021-10-11 | 2021-10-11 | Composite pipe is with big latus rectum withhold connection structure |
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| CN216479411U true CN216479411U (en) | 2022-05-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202122439349.3U Active CN216479411U (en) | 2021-10-11 | 2021-10-11 | Composite pipe is with big latus rectum withhold connection structure |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114877151A (en) * | 2022-05-25 | 2022-08-09 | 临海伟星新型建材有限公司 | Full-bore high-pressure connecting structure of composite pipe and connecting method thereof |
| CN114962809A (en) * | 2022-05-25 | 2022-08-30 | 临海伟星新型建材有限公司 | Full-bore connecting structure and method for middle-high pressure plastic composite pipe |
-
2021
- 2021-10-11 CN CN202122439349.3U patent/CN216479411U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114877151A (en) * | 2022-05-25 | 2022-08-09 | 临海伟星新型建材有限公司 | Full-bore high-pressure connecting structure of composite pipe and connecting method thereof |
| CN114962809A (en) * | 2022-05-25 | 2022-08-30 | 临海伟星新型建材有限公司 | Full-bore connecting structure and method for middle-high pressure plastic composite pipe |
| CN114962809B (en) * | 2022-05-25 | 2024-04-09 | 临海伟星新型建材有限公司 | Full-drift-diameter connecting structure and method for medium-high-pressure plastic composite pipe |
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