CN212273303U

CN212273303U - Corrosion-resistant high-sealing-performance steel-plastic composite pipeline

Info

Publication number: CN212273303U
Application number: CN202020452630.3U
Authority: CN
Inventors: 曲悦
Original assignee: Hebei Shensi Power Technology Co ltd
Current assignee: Hebei Shensi Power Technology Co ltd
Priority date: 2020-04-01
Filing date: 2020-04-01
Publication date: 2021-01-01
Anticipated expiration: 2030-04-01

Abstract

The utility model relates to a corrosion-resistant high-sealing steel-plastic composite pipeline, which comprises a pipe body, wherein the pipe body is sequentially provided with an inner plastic layer, a hollow steel pipe layer and an outer plastic layer from inside to outside; the two ends of the tube body are respectively provided with a first connecting part and a second connecting part; the first connecting part comprises a first upper boss, a first lower boss, a first upper recess and a first lower recess; the lower surface of the first upper lug boss and the upper surface of the first lower lug boss which form the first upper recess are provided with first inner helicoids; the lower surface of the first lower boss is provided with a first outer spiral ring; the second connecting part comprises a second upper boss, a second lower boss, a second upper recess and a second lower recess; the upper surface of the second upper lug boss is provided with a second outer helicoid corresponding to the first inner helicoid, the lower surface of the second upper lug boss forming a second lower recess and the upper surface of the second lower lug boss are provided with a second inner helicoid, and the second inner helicoid corresponds to the first outer helicoid. The steel-plastic composite pipe has high joint strength, high sealing performance and high corrosion resistance, and is not easy to leak.

Description

Corrosion-resistant high-sealing-performance steel-plastic composite pipeline

Technical Field

The utility model belongs to the technical field of the plastic tubing, concretely relates to compound pipeline is moulded to steel of corrosion-resistant high leakproofness.

Background

The steel-plastic composite pipeline with the plastic lining has the advantages of high corrosion resistance, high bearing capacity, small fluid resistance, safety, sanitation, long service life and the like, and is widely applied to various gathering and transportation fields such as oil and gas fields and the like. The important key technology for applying the steel-plastic composite pipeline is how to play the performance of steel-plastic combination, not only ensuring enough strength, but also ensuring reliable corrosion resistance, in particular to the steel-plastic composite pipeline for conveying high-temperature and high-pressure fluid media, the firm combination of lining plastic and a steel pipe and the sealing technology of a pipe orifice are particularly critical, flanges and added sealing gaskets are usually adopted at two ends of the pipeline for pipeline sealing in the prior art, but the sealing combination part is a weak part of the steel-plastic composite pipeline, so that the strength effect and the corrosion prevention effect of the steel-plastic composite pipeline are greatly weakened, and fluid leakage is easy to occur at the pipe orifice sealing connection part between the steel-plastic composite pipelines particularly under the condition of introducing high-temperature and high-pressure fluid.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is: to the above defect, the utility model provides a compound pipeline is moulded to steel of corrosion-resistant high leakproofness, the junction joint strength of compound pipe is high is moulded to steel, is difficult for taking place to leak, and sealing performance is high, and corrosion resisting property is good.

The utility model provides a technical scheme that its technical problem adopted as follows: a corrosion-resistant high-sealing-performance steel-plastic composite pipeline comprises a pipe body, wherein the pipe body sequentially comprises an inner plastic layer, a hollow steel pipe layer and an outer plastic layer from inside to outside; the two ends of the tube body are respectively provided with a first connecting part and a second connecting part corresponding to the first connecting part;

the first connecting part comprises a first upper boss, a first lower boss, a first upper recess formed between the first upper boss and the first lower boss, and a first lower recess is formed between the first lower boss and the inner plastic layer plane in the pipe body; the lower surface of the first upper lug boss and the upper surface of the first lower lug boss which form the first upper recess are provided with first inner helicoids; the lower surface of the first lower boss is provided with a first outer spiral ring;

the second connecting part comprises a second upper boss, a second lower boss, a second upper recess formed between the second upper boss and the second lower boss and the second upper boss and the plane of the middle outer plastic layer of the pipe body and the plane of the outer plastic layer of the pipe body; the upper surface of the second upper lug boss is provided with a second outer helicoid corresponding to the first inner helicoid, the lower surface of the second upper lug boss forming a second lower recess and the upper surface of the second lower lug boss are provided with a second inner helicoid, and the second inner helicoid is corresponding to the first outer helicoid.

Furthermore, the first inner spiral ring on the upper surface of the first lower boss and the first outer spiral ring on the lower surface of the first lower boss have the same thread and are complete threads; and the second outer screw ring on the upper surface of the second upper boss and the second inner screw ring on the lower surface of the second upper boss are in the same screw thread and are complete screw threads.

Further, the length of the first upper boss is not less than that of the first lower boss; the length of the second upper boss is not more than that of the second lower boss.

Further, a first sealing gasket is arranged in the first upper recess; and a second sealing gasket is arranged in the second lower recess.

Further, the inside plastics inside lining that is equipped with of body, the plastics inside lining sets up at first connecting portion tip.

Furthermore, the width of the plastic lining is larger than the length of the first connecting part and the second connecting part after being matched.

Further, the inner plastic layer is fixedly connected with the hollow steel pipe layer through a first adhesive layer, and the outer plastic layer is fixedly connected with the hollow steel pipe layer through a second adhesive layer.

Further, the first connecting part, the second connecting part and the pipe body are integrally formed; the first connecting portion and the second connecting portion are flush with the horizontal planes at the two ends of the pipe body.

The utility model has the advantages that:

1. the utility model provides a steel-plastic composite pipeline, the first connecting portion and the second connecting portion at both ends are through the double threaded connection of the outer helicoid of first interior helicoid and second, first outer helicoid and second, improve the joint strength of compound union coupling department is moulded to steel, are difficult for taking place to leak, improve sealing performance to the corrosion resisting property of compound pipe is moulded to steel.

2. The first inner helicoid and the first outer helicoid form complete threads on the first lower boss, and the second outer helicoid and the second inner helicoid form complete threads on the second upper boss, so that the processing is convenient and fast, and the integral forming can be realized; because the first upper boss and the first lower boss are matched with the second upper boss and the second lower boss to form gaps, and the sealing gasket is arranged in the corresponding recess, the sealing performance of the steel-plastic composite pipe is further improved; the production mode of integrated into one piece can reduce the processing degree of difficulty, ensures that steel plastic composite pipe surface is level simultaneously.

3. This compound pipeline connection is moulded to steel has the plastics inside lining to be greater than the length behind first connecting portion and the cooperation of second connecting portion with plastics inside lining length, the joint strength of this department after can improving first connecting end portion and the cooperation of second connecting end portion on the one hand, improve the intensity and the tolerance of pipe connection, on the other hand can avoid carrying the medium to permeate to the connecting piece from the junction, improves the life of this compound pipe is moulded to steel.

Drawings

The foregoing and other objects, features, and advantages of the invention will be apparent from the following detailed description taken in conjunction with the accompanying drawings.

FIG. 1 is a schematic structural view of the present invention;

fig. 2 is a schematic view of the matching structure of the first connecting portion and the second connecting portion of the present invention;

wherein: the pipe body is 1, the inner plastic layer is 11, the hollow steel pipe layer is 12, the outer plastic layer is 13, the first adhesive layer is 14, the second adhesive layer is 15, the first connecting part is 2, the first upper boss is 21, the first lower boss is 22, the first upper recess is 23, the first lower recess is 24, the first inner coil is 25, the first outer coil is 26, the first sealing gasket is 27, the second connecting part is 3, the second upper boss is 31, the second lower boss is 32, the second upper recess is 33, the second lower recess is 34, the second outer coil is 35, the second inner coil is 36, the second sealing gasket is 37, and the plastic lining is 4.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Referring to fig. 1 and 2, the corrosion-resistant high-sealing-performance steel-plastic composite pipeline comprises a pipe body 1, wherein the pipe body 1 sequentially comprises an inner plastic layer 11, a hollow steel pipe layer 12 and an outer plastic layer 13 from inside to outside; the inner plastic layer 11 is fixedly connected with the hollow steel pipe layer 12 through a first adhesive layer 14, and the outer plastic layer 13 is fixedly connected with the hollow steel pipe layer 12 through a second adhesive layer 15; the two ends of the tube body 1 are respectively provided with a first connecting part 2 and a second connecting part 3 corresponding to the first connecting part 2; the first connecting part 2 and the second connecting part 3 are integrally formed with the tube body 1; the first connecting part 2 and the second connecting part 3 are flush with the horizontal planes at the two ends of the pipe body 1;

the first connecting part 2 comprises a first upper boss 21, a first lower boss 22, a first upper recess 23 formed between the first upper boss 21 and the first lower boss 22, and a first lower recess 24 formed between the first lower boss 22 and the plane of the inner plastic layer 11 in the pipe body 1; the lower surface of the first upper boss 21 and the upper surface of the first lower boss 22 which form the first upper recess 23 are provided with a first inner coil 25; the lower surface of the first lower boss 22 is provided with a first outer coil 26;

the second connecting part 3 comprises a second upper boss 31, a second lower boss 32, a second upper boss 31 and a second lower recess 34 formed between the second upper boss 31 and the second lower boss 32, wherein the second upper boss 31 and the plane of the middle and outer plastic layers 13 of the pipe body 1 are provided with the second upper recess 33; a second outer spiral coil 35 corresponding to the first inner spiral coil 25 is arranged on the upper surface of the second upper boss 31 to form a second lower recess 34, a second inner spiral coil 36 is arranged on the lower surface of the second upper boss 31 and the upper surface of the second lower boss 32, and the second inner spiral coil 36 corresponds to the first outer spiral coil 26;

the first inner coil 25 on the upper surface of the first lower boss 22 and the first outer coil 26 on the lower surface of the first lower boss 22 have the same thread and are complete threads; the second outer helicoid 35 on the upper surface of the second upper boss 31 is in thread consistency with the second inner helicoid 36 on the lower surface of the second upper boss 31, and is a complete thread;

the length of the first upper boss 21 is not less than that of the first lower boss 22; the length of the second upper boss 31 is not more than that of the second lower boss 32, and a first sealing gasket 27 is arranged in the correspondingly formed first upper recess 23; a second sealing gasket 37 is arranged in the second lower recess 34;

a plastic lining 4 is arranged inside the pipe body 1, and the plastic lining 4 is arranged at the end part of the first connecting part 2; the width of the plastic lining 4 is larger than the length of the first connecting part 2 and the second connecting part 3 after being matched.

According to the steel-plastic composite pipeline, the first connecting part 2 and the second connecting part 3 at two ends are in double-thread connection through the first inner spiral ring and the second outer spiral ring and the first outer spiral ring and the second inner spiral ring, so that the connecting strength of the connecting part of the steel-plastic composite pipeline is improved, leakage is not easy to occur, the sealing performance is improved, and the corrosion resistance of the steel-plastic composite pipeline is improved; the plastic lining 4 is arranged, so that the connection strength of the pipeline connection part is further improved, the pipeline sealing performance is good, and the corrosion resistance is high.

In light of the foregoing, it will be apparent to those skilled in the art from this disclosure that various changes and modifications can be made without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims

1. A corrosion-resistant high-sealing-performance steel-plastic composite pipeline comprises a pipe body (1), wherein the pipe body (1) sequentially comprises an inner plastic layer (11), a hollow steel pipe layer (12) and an outer plastic layer (13) from inside to outside; the method is characterized in that: the two ends of the tube body (1) are respectively provided with a first connecting part (2) and a second connecting part (3) corresponding to the first connecting part (2);

the first connecting part (2) comprises a first upper boss (21), a first lower boss (22), a first upper recess (23) formed between the first upper boss (21) and the first lower boss (22), and a first lower recess (24) formed between the first lower boss (22) and the plane of the inner plastic layer (11) in the pipe body (1); a first inner helicoid (25) is arranged on the lower surface of a first upper boss (21) and the upper surface of a first lower boss (22) which form a first upper recess (23); the lower surface of the first lower boss (22) is provided with a first outer coil (26);

the second connecting part (3) comprises a second upper boss (31), a second lower boss (32), a second upper recess (33) formed between the second upper boss (31) and the second lower boss (32), and a second upper recess (34) formed between the second upper boss (31) and the second lower boss (32) formed between the second upper boss (31) and the middle outer plastic layer (13) plane of the pipe body (1); the upper surface of the second upper boss (31) is provided with a second outer helicoid (35) corresponding to the first inner helicoid (25), a second lower recess (34) is formed, the lower surface of the second upper boss (31) and the upper surface of the second lower boss (32) are provided with a second inner helicoid (36), and the second inner helicoid (36) corresponds to the first outer helicoid (26).

2. The corrosion-resistant high-sealability steel-plastic composite pipe according to claim 1, wherein: the threads of a first inner spiral ring (25) on the upper surface of the first lower boss (22) are consistent with those of a first outer spiral ring (26) on the lower surface of the first lower boss (22) and are complete threads; and a second outer spiral ring (35) on the upper surface of the second upper boss (31) is consistent with a second inner spiral ring (36) on the lower surface of the second upper boss (31) in thread and is a complete thread.

3. The corrosion-resistant high-sealability steel-plastic composite pipe according to claim 1, wherein: the length of the first upper boss (21) is not less than that of the first lower boss (22); the length of the second upper boss (31) is not more than that of the second lower boss (32).

4. The corrosion-resistant high-sealability steel-plastic composite pipe according to claim 1, wherein: a first sealing gasket (27) is arranged in the first upper recess (23); and a second sealing gasket (37) is arranged in the second lower recess (34).

5. The corrosion-resistant high-sealability steel-plastic composite pipe according to claim 1, wherein: the plastic pipe is characterized in that a plastic lining (4) is arranged inside the pipe body (1), and the plastic lining (4) is arranged at the end part of the first connecting part (2).

6. The corrosion-resistant high-sealability steel-plastic composite pipe according to claim 5, wherein: the width of the plastic inner liner (4) is greater than the length of the first connecting part (2) and the second connecting part (3) after being matched.

7. The corrosion-resistant high-sealability steel-plastic composite pipe according to claim 1, wherein: the inner plastic layer (11) is fixedly connected with the hollow steel pipe layer (12) through a first adhesive layer (14), and the outer plastic layer (13) is fixedly connected with the hollow steel pipe layer (12) through a second adhesive layer (15).

8. The corrosion-resistant high-sealability steel-plastic composite pipe according to claim 1, wherein: the first connecting part (2), the second connecting part (3) and the pipe body (1) are integrally formed; the first connecting part (2) and the second connecting part (3) are flush with the horizontal planes at the two ends of the pipe body (1).