CN218780912U

CN218780912U - Square flange corrugated pipe expansion joint

Info

Publication number: CN218780912U
Application number: CN202223164800.6U
Authority: CN
Inventors: 张荣喜
Original assignee: Jiangsu Shunbang Pipe Technology Co ltd
Current assignee: Jiangsu Shunbang Pipe Technology Co ltd
Priority date: 2022-11-28
Filing date: 2022-11-28
Publication date: 2023-03-31
Anticipated expiration: 2032-11-28

Abstract

The utility model relates to a square flange bellows expansion joint, including left takeover, bellows, right takeover and honeycomb duct, the bellows both ends respectively with left takeover and right takeover welded fastening, the honeycomb duct is established in the bellows, the honeycomb duct left end and left takeover welded fastening, the honeycomb duct right-hand member is established as the free end and stretches into in the right takeover, be equipped with the elastic spacer ring between honeycomb duct free end and the right takeover inner wall, establish as the convex transition surface between its free end and the fixed end; the fixed end of the elastic spacing ring is welded and fixed with the inner wall of the flow guide pipe, and the free end of the elastic spacing ring is in elastic contact connection with the inner wall of the right connecting pipe. The utility model discloses set up the elasticity spacer ring between the inner wall is taken over with the right side to honeycomb duct free end, can effectively prevent in the buggy particle gets into the intermediate layer of bellows and honeycomb duct to the protection bellows, reducing wear improves the reliability of whole expansion joint. The utility model discloses the installation is convenient with the maintenance, and intensity is high, long service life to the maintenance cost of expansion joint has been reduced.

Description

Square flange corrugated pipe expansion joint

Technical Field

The utility model belongs to the technical field of pipeline expansion joint technique and specifically relates to a square flange bellows expansion joint.

Background

Pipe expansion joints are also known as compensators or expansion joints. The expansion joint is generally composed of a corrugated pipe, an end pipe, a flange, a flow guide pipe and other members. The expansion joint is a compensating element of a pipeline, and mainly utilizes the expansion deformation of a corrugated pipe to absorb the dimensional change of a pipeline, a conduit, a container and the like caused by expansion with heat and contraction with cold or compensate the axial, transverse or angular displacement of the pipeline, the conduit, the container and the like.

The expansion joint that is used for power plant, cement plant flue-gas wind or buggy pipeline now, the expansion joint can make bellows wearing and tearing aggravation in the long-term use in having the buggy particle to enter into the intermediate layer of bellows and honeycomb duct in the use, and the expansion joint uses three to five years and will takes place the leakage phenomenon to must change the expansion joint, lead to life shorter, the work load of maintaining and changing is big, and the cost is higher.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a square flange bellows expansion joint that is difficult for leaking, the reliability is high, long service life to the not enough of above current pipeline expansion joint.

The purpose of the utility model is realized by adopting the following technical scheme:

a square flange corrugated pipe expansion joint comprises a left connecting pipe, a corrugated pipe, a right connecting pipe and a flow guide pipe, wherein two ends of the corrugated pipe are respectively welded and fixed with the left connecting pipe and the right connecting pipe; the fixed end of the elastic spacer ring is welded and fixed with the inner wall of the free end of the flow guide pipe, and the free end of the elastic spacer ring is in elastic contact connection with the inner wall of the right connecting pipe.

As the preferred technical scheme of the utility model, the external diameter of elasticity spacer ring free end is greater than or equal to the internal diameter that the right side was taken over before the installation.

As the preferred technical scheme of the utility model, the surface of left side takeover and right takeover is provided with a pair of square flange relatively, and the square flange is established to square structure, and its center is the takeover mounting hole, and four corner position equipartitions of square flange set up four screw rod mounting holes, connect through screw rod and nut packing ring subassembly between two square flanges.

As the preferred technical scheme of the utility model, the both sides of every screw rod mounting hole of square flange respectively are equipped with a pair of deep floor.

As the preferred technical scheme of the utility model, four locating holes are evenly distributed around the square flange connecting pipe mounting hole.

As the preferable technical proposal of the utility model, four corners of the square flange are set to be chamfer angles of 45 degrees.

As the utility model discloses a preferred technical scheme, nut and washer subassembly is including the sphere packing ring, the conical surface packing ring, thin nut and the lock nut that connect gradually.

As the preferred technical scheme of the utility model, still be equipped with the rib ring in the trough of bellows.

The utility model has the advantages that: compared with the prior art, the utility model discloses set up the elasticity spacer ring between the inner wall of the free end of honeycomb duct and right side are taken over, can effectively the separation buggy particle get into in the intermediate layer of bellows and honeycomb duct to the protection bellows, reducing wear improves the reliability of whole expansion joint. Meanwhile, the rib ring is arranged in the wave trough of the corrugated pipe, so that the corrugated pipe is prevented from being excessively compressed, and the corrugated pipe is further protected. The utility model discloses the installation is convenient with the maintenance, and intensity is high, long service life to the maintenance cost of expansion joint has been reduced.

Drawings

The invention will be further described with reference to the following detailed description of the embodiments with reference to the accompanying drawings:

fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic structural view of the square flange of the present invention.

1. The device comprises a left connecting pipe, 2 a rib plate, 3 a square flange, 4 a corrugated pipe, 5 a flow guide pipe, 6 a screw, 7 a nut and washer assembly, 8 a right connecting pipe, 9 an elastic spacer ring, 10 a rib ring; 31. screw rod mounting hole, 32, locating hole, 33, takeover mounting hole.

Detailed Description

As shown in fig. 1 and 2, a square flange bellows expansion joint includes a left connection pipe 1, a bellows 4, a right connection pipe 8 and a flow guide pipe 5, two ends of the bellows 4 are respectively welded and fixed with the left connection pipe 1 and the right connection pipe 8, the flow guide pipe 5 is arranged in the bellows 4, a left end of the flow guide pipe 5 is welded and fixed with an inner wall of the left connection pipe 1, a right end of the flow guide pipe 5 is arranged as a free end and extends into an inner cavity of the right connection pipe 8, an elastic spacer ring 9 is arranged between the free end of the flow guide pipe 5 and the inner wall of the right connection pipe 8, one end of the elastic spacer ring is arranged as a fixed end, the other end of the elastic spacer ring is arranged as a free end, and an arc-shaped transition surface is arranged between the free end and the fixed end of the elastic spacer ring 9; the fixed end of the elastic spacing ring 9 is welded and fixed with the inner wall of the free end of the draft tube 5, and the free end of the elastic spacing ring 9 is in elastic contact connection with the inner wall of the right connecting tube 8.

Before installation, the outer diameter of the free end of the elastic spacer ring 9 is larger than or equal to the inner diameter of the right connecting pipe 8, so that elastic contact connection is formed between the free end of the elastic spacer ring 9 and the inner wall of the right connecting pipe 8 after installation.

In the embodiment, a pair of square flanges 3 are oppositely arranged on the outer surfaces of the left connecting pipe 1 and the right connecting pipe 8; the square flange 3 is of a square structure, the center of the square flange is provided with a connecting pipe mounting hole 33, four screw mounting holes 31 are uniformly distributed at four corner positions of the square flange 3, and the two square flanges 3 are connected through a screw 6 and a nut and washer assembly 7.

A pair of reinforcing rib plates 2 are respectively arranged on two sides of each screw mounting hole 31 of the square flange 3; four positioning holes 32 are uniformly distributed around the square flange connecting pipe mounting hole 33; four corners of the square flange are set to be 45-degree chamfers. The nut and washer assembly 7 comprises a spherical washer, a conical washer, a thin nut and a locking nut which are connected in sequence. The corrugated tubing 4 also has rib rings 10 in the valleys, which rib rings 10 help to prevent over-compression of the corrugated tubing during use, thereby further protecting the corrugated tubing.

The above embodiments are only for illustrating the conception and technical features of the present invention, and the purpose thereof is to make the technical personnel skilled in the art understand the technical solution and implementation mode of the present invention, and thus the protection scope of the present invention can not be limited thereby. All equivalent substitutions or equivalent changes made according to the technical scheme of the utility model are covered in the protection scope of the utility model.

Claims

1. The utility model provides a square flange bellows expansion joint, includes left takeover, bellows, right takeover and honeycomb duct, the both ends of bellows respectively with left takeover and right takeover welded fastening, the honeycomb duct is established in the bellows, the left end of honeycomb duct and the inner wall welded fastening of left takeover, the right-hand member of honeycomb duct is established to the free end and is stretched into in the inner chamber of right takeover, characterized by: an elastic spacer ring is arranged between the free end of the flow guide pipe and the inner wall of the right connecting pipe, one end of the elastic spacer ring is set as a fixed end, the other end of the elastic spacer ring is set as a free end, and an arc-shaped transition surface is arranged between the free end and the fixed end of the elastic spacer ring;

the fixed end of the elastic spacer ring is welded and fixed with the inner wall of the free end of the flow guide pipe, and the free end of the elastic spacer ring is in elastic contact connection with the inner wall of the right connecting pipe.

2. The square flange bellows expansion joint of claim 1, wherein: the outer diameter of the free end of the elastic spacer ring is larger than or equal to the inner diameter of the right connecting pipe before installation.

3. The square flange bellows expansion joint of claim 1 or 2, wherein: the outer surfaces of the left connecting pipe and the right connecting pipe are oppositely provided with a pair of square flanges, the square flanges are in square structures, the centers of the square flanges are connecting pipe mounting holes, four screw mounting holes are uniformly distributed in four corner positions of the square flanges, and the two square flanges are connected through screw and nut washer assemblies.

4. The square flange bellows expansion joint of claim 3, wherein: two sides of each screw mounting hole of the square flange are respectively provided with a pair of reinforcing rib plates.

5. The square flange bellows expansion joint of claim 3, wherein: four positioning holes are uniformly distributed on the periphery of the square flange connecting pipe mounting hole.

6. The square flange bellows expansion joint of claim 3, wherein: four corners of the square flange are set to be chamfer angles of 45 degrees.

7. The square flange bellows expansion joint of claim 3, wherein: the nut washer component comprises a spherical washer, a conical washer, a thin nut and a locking nut which are connected in sequence.

8. The square flange bellows expansion joint of claim 1, wherein: and rib rings are also arranged in the wave troughs of the corrugated pipe.