CN216242913U

CN216242913U - Flexible expansion joint

Info

Publication number: CN216242913U
Application number: CN202122437750.3U
Authority: CN
Inventors: 张宇峰
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-10-11
Filing date: 2021-10-11
Publication date: 2022-04-08
Anticipated expiration: 2031-10-11

Abstract

The utility model provides a flexible expansion joint which comprises a flexible connecting piece and flange plates arranged at two ends of the flexible connecting piece, wherein the flange plates are connected with an external pipeline, the middle part of the flexible connecting piece is corrugated, the flexible connecting piece comprises an outer layer, an inner layer and a reinforcing layer arranged between the inner layer and the outer layer, the outer layer and the inner layer are made of thermoplastic polyurethane, and a limiting mechanism is arranged between the two flange plates. The utility model has the following beneficial effects: through the reinforcing layer and the inner layer and the outer layer which are made of thermoplastic polyurethane instead of rubber, the technical problem that the strength and the toughness of the expansion joint are greatly reduced after deformation in the conventional expansion joint is solved, and the flexible expansion joint with excellent strength, toughness, oil resistance, corrosion resistance, wear resistance and aging resistance is obtained.

Description

Flexible expansion joint

Technical Field

The utility model relates to the technical field of pipeline connection, in particular to a flexible expansion joint.

Background

The existing pipeline can not fully and autonomously expand and contract with cold when the temperature changes, great stress can be generated in the pipeline, and the superposition of the stress can cause the pipeline and equipment to be damaged and the situations of leakage, leakage and the like can occur.

Therefore, in the process of pipeline installation and construction, a telescopic device and an expansion joint are usually additionally arranged to eliminate stress, wherein the middle section of the nonmetal type pipeline is mainly made of rubber, and two ends of the nonmetal type pipeline are connected with the pipeline by using a flange as an external connecting piece.

However, the existing rubber expansion joint is aged quickly in the using process, and the mechanical properties such as strength, toughness and the like of the existing rubber expansion joint are greatly reduced after deformation occurs; especially when carrying some liquid that contain the solid particle, along with the change of temperature, rubber expansion joint takes place deformation, and mechanical properties descends this moment, and the solid particle of inside and joint inner wall bump and friction this moment can accelerate rubber expansion joint strain for rubber expansion joint's life reduces.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects in the prior art, the utility model provides a flexible expansion joint, which solves the technical problem that the strength and toughness of the expansion joint are greatly reduced after the expansion joint deforms in the prior expansion joint.

According to the embodiment of the utility model, the flexible expansion joint comprises a flexible connecting piece and flange plates arranged at two ends of the flexible connecting piece, the flange plates are connected with an external pipeline, the middle part of the flexible connecting piece is corrugated, the flexible connecting piece comprises an outer layer, an inner layer and a reinforcing layer arranged between the inner layer and the outer layer, the outer layer and the inner layer are made of thermoplastic polyurethane, and a limiting mechanism is arranged between the two flange plates.

Further, the inner wall and the outer wall of the middle part of the flexible connecting piece are corrugated along the axial direction, and the corrugation comprises one or more sine waves.

Furthermore, flanges attached to the flange plates are arranged at two ends of the flexible connecting piece, a plurality of concentric annular reinforcing ribs are arranged on the reinforcing layer at the flange positions, the annular reinforcing ribs on the outermost side are arranged at the tail end of the reinforcing layer, and the annular reinforcing ribs on the innermost side are arranged at the bending positions of the reinforcing layer.

Furthermore, the inner layer and the outer layer at the tail end of the flanging are directly attached.

Furthermore, the flange plate is attached to the inner side of the turned edge, the outer side of the turned edge is connected with an external pipeline, fixing holes are uniformly distributed in the end face of the external pipeline, the flange plate and the turned edge, the end face of the external pipeline, the flange plate and the fixing holes in the turned edge are in one-to-one correspondence, and the fixing holes are fixed through fixing bolts.

Furthermore, stop gear includes long screw and two nuts, the both sides ring flange is connected to the long screw, two nuts are all installed to long screw position on two ring flange both sides positions.

Furthermore, connecting holes are formed in the end face of the flange plate externally connected with the pipeline, between the flange plate and the adjacent fixing holes in the turned-over edge, and each connecting hole penetrates through one long screw rod.

Furthermore, the flange plate is circumferentially and uniformly provided with positioning blocks, the positioning blocks are provided with fixing holes at fixed positions, the end face of the external pipeline, the flange plate and the flange are provided with fixing holes at positions corresponding to the fixing holes, the corresponding fixing holes are fixed by adopting fixing bolts to penetrate through, the positioning blocks are provided with connecting holes, and each connecting hole is penetrated by a long screw rod.

Furthermore, the reinforcing layer is woven into a net structure by adopting fiber nylon wires or steel wires, and the mesh aperture of the net structure is controlled between 4 mm and 5 mm.

The technical principle of the utility model is as follows: the inner layer and the outer layer are made of thermoplastic polyurethane instead of rubber, the thermoplastic polyurethane has excellent oil resistance, toughness, corrosion resistance, wear resistance and aging resistance, so that the oil resistance, the toughness, the wear resistance and the aging resistance of the flexible connecting piece are improved, and the reinforcing layer plays a role in increasing the strength of the flexible connecting piece.

Meanwhile, a connecting limiting mechanism is arranged between the flange plates, and the limiting displacement limitation of the stretching and the compression of the flexible connecting piece is controlled through the limiting mechanism.

Compared with the prior art, the utility model has the following beneficial effects: through the reinforcing layer and the inner layer and the outer layer which are made of thermoplastic polyurethane instead of rubber, the technical problem that the strength and the toughness of the expansion joint are greatly reduced after deformation in the conventional expansion joint is solved, and the flexible expansion joint with excellent strength, toughness, oil resistance, corrosion resistance, wear resistance and aging resistance is obtained.

Drawings

Fig. 1 is a sectional view of a flexible expansion joint according to embodiment 1 of the present invention.

Fig. 2 is a partially enlarged view of a portion a of fig. 1.

Fig. 3 is a sectional view of B-B of fig. 1.

Fig. 4 is a schematic structural view of a flange plate according to embodiment 2 of the present invention.

In the above drawings: 10. a flexible connector; 11. an outer layer; 12. an inner layer; 13. a reinforcing layer; 14. a sine wave; 15. flanging; 16. an annular reinforcing rib; 20. a flange plate; 21. a fixing hole; 22. fixing the bolt; 23. positioning blocks; 24. connecting holes; 30. a limiting mechanism; 31. a long screw; 32. double nuts; 40. is externally connected with a pipeline.

Detailed Description

The technical solution of the present invention is further explained with reference to the drawings and the embodiments.

Example 1

The flexible expansion joint shown in fig. 1 comprises a flexible connecting piece 10 and flange plates 20 arranged at two ends of the flexible connecting piece 10, wherein the flange plates 20 are connected with an external pipeline 40, the middle part of the flexible connecting piece 10 is corrugated, the flexible connecting piece 10 comprises an outer layer 11, an inner layer 12 and a reinforcing layer 13 arranged between the inner layer 12 and the outer layer 11, the outer layer 11 and the inner layer 12 are made of thermoplastic polyurethane, and a limiting mechanism 30 is arranged between the two flange plates 20 and used for limiting the expansion limit of the flexible connecting piece 10.

As shown in fig. 1, the inner wall and the outer wall of the middle part of the flexible connecting element 10 are corrugated in the axial direction, the corrugation comprises one or more sine waves 14, the specific corrugation is designed according to the size of pipeline stress, and 2 or 3 sections of sine waves 14 are preferably adopted, because too much sine waves 14 can increase the collision of liquid with the pipe wall of the flexible connecting element 10, and further accelerate wear, so 2 to 3 sections of sine waves are preferably designed.

As shown in fig. 1-2, flanges 15 attached to flanges 20 are integrally formed at two ends of a flexible connector 10, a plurality of concentric annular reinforcing ribs 16 are arranged on a reinforcing layer 13 at the position of the flanges 15, the annular reinforcing ribs 16 are integrally formed with an inner layer 12 or an outer layer 11, the outermost annular reinforcing rib 16 is arranged at the tail end of the reinforcing layer 13, and the innermost annular reinforcing rib 16 is arranged at the bending position of the reinforcing layer 13 to play a role of fixing a reinforcing layer 13.

The specific reinforcing layer 13 is a net structure woven by fiber nylon wires or steel wires, the mesh aperture of the net structure is controlled to be 4-5mm, and the thermoplastic polyurethane in the embodiment adopts Wanhua WHT-8280 or Pasteur ES85A 15000. The reinforcing layer 13 is formed by weaving fiber nylon threads, is a macromolecular compound with thermoplastic polyurethane, has more similar molecular properties, and has smoother stress conduction in the integral forming process, so that the stress distribution is more uniform in the stretching process, and the internal loss caused by uneven stress is avoided.

As shown in FIG. 2, the inner layer 12 at the end of the cuff 15 is directly attached to the outer layer 11, so that the reinforcing layer 13 is wrapped in the inner layer 12 and the outer layer 11, and the flexible connecting member 10 is prevented from cracking from the position of the reinforcing layer 13.

As shown in fig. 1 and 3, the flange 20 is attached to the inner side of the flange 15, the outer side of the flange 15 is connected with the external pipeline 40, fixing holes 21 are uniformly distributed on the end surface of the external pipeline 40, the flange 20 and the flange 15, the end surface of the external pipeline 40, the flange 20 and the fixing holes 21 on the flange 15 are in one-to-one correspondence, the corresponding fixing holes 21 are fixed by penetrating through the fixing bolts 22, and the flexible connecting piece 10 and the external pipe fitting are connected.

As shown in fig. 1 and 3, the limiting mechanism 30 includes a long screw 31 and two nuts 32, the long screw 31 connects the flanges 20 on two sides, the long screw 31 is located on two sides of the flanges 20 and is provided with the two nuts 32, the end face of the external pipeline 40 of the specific flange 20 and the adjacent fixing holes 21 on the flanges 20 and the flanges 15 are provided with connecting holes 24, each connecting hole 24 penetrates through one long screw 31, and the long screw 31 is matched with the two nuts 32 to limit the expansion limit of the flexible connector 10.

Example 2

As shown in fig. 4, the present embodiment is different from embodiment 1 in that: the flange plate 20 is circumferentially and uniformly provided with positioning blocks 23, the positioning blocks 23 are provided with fixing holes 21 at fixed positions, the end face of the external pipeline 40, the flange plate 20 and the flange 15 are also provided with fixing holes 21 at positions corresponding to the fixing holes 21, the corresponding fixing holes 21 are fixed by penetrating through fixing bolts 22, the positioning blocks 23 are provided with connecting holes 24, each connecting hole 24 is penetrated through by one long screw 31, and the telescopic limit of the flexible connecting piece 10 is limited by matching the long screw 31 with the double nuts 32.

Finally, the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered in the claims of the present invention.

Claims

1. The utility model provides a flexible expansion joint, is in including flexible connectors and setting the ring flange at flexible connectors both ends, the ring flange is connected with external pipeline, flexible connectors middle part is established to corrugate, its characterized in that: the flexible connecting piece comprises an outer layer, an inner layer and a reinforcing layer arranged between the inner layer and the outer layer, the outer layer and the inner layer are made of thermoplastic polyurethane, and a limiting mechanism is arranged between the two flanges.

2. A flexible expansion joint as claimed in claim 1, wherein: the inner wall and the outer wall of the middle part of the flexible connecting piece are corrugated along the axial direction, and the corrugation comprises one or more sine waves.

3. A flexible expansion joint as claimed in claim 1, wherein: flanges attached to the flange plates are arranged at two ends of the flexible connecting piece, a plurality of concentric annular reinforcing ribs are arranged on the reinforcing layer at the flange positions, the annular reinforcing ribs on the outermost side are arranged at the tail end of the reinforcing layer, and the annular reinforcing ribs on the innermost side are arranged at the bending positions of the reinforcing layer.

4. A flexible expansion joint according to claim 3, wherein: the inner layer and the outer layer at the tail end of the flanging are directly attached.

5. A flexible expansion joint according to claim 3, wherein: the flange plate is attached to the inner side of the turned edge, the outer side of the turned edge is connected with an external pipeline, fixing holes are uniformly distributed in the end face of the external pipeline, the flange plate and the turned edge, the end face of the external pipeline, the flange plate and the fixing holes in the turned edge correspond to one another one by one, and the fixing holes are fixed by penetrating through fixing bolts.

6. A flexible expansion joint according to claim 5, wherein: the limiting mechanism comprises a long screw and two nuts, the long screw is connected with the flange plates on two sides, and the two nuts are arranged on the two sides of the two flange plates of the long screw.

7. A flexible expansion joint according to claim 6, wherein: connecting holes are formed in the end face of the flange plate, which is externally connected with the pipeline, and between the flange plate and the adjacent fixing holes in the turned-over edge, and each connecting hole penetrates through one long screw rod.

8. A flexible expansion joint according to claim 3, wherein: the flange plate is circumferentially and uniformly provided with positioning blocks, fixing holes are formed in the fixing positions of the positioning blocks, fixing holes are also formed in the end face of the external pipeline, the flange plate and the flange corresponding to the fixing holes, the corresponding fixing holes are fixed by penetrating through fixing bolts, the positioning blocks are provided with connecting holes, and each connecting hole is penetrated by one long screw.

9. A flexible expansion joint as claimed in claim 1, wherein: the reinforcing layer is woven into a net structure by adopting fiber nylon wires or steel wires, and the mesh aperture of the net structure is controlled between 4 mm and 5 mm.