CN213712277U

CN213712277U - Universal straight pipe pressure balance type metal corrugated expansion joint

Info

Publication number: CN213712277U
Application number: CN202022239707.1U
Authority: CN
Inventors: 李敏
Original assignee: Chongqing Minte Metal Products Co ltd
Current assignee: Chongqing Minte Metal Products Co ltd
Priority date: 2020-10-10
Filing date: 2020-10-10
Publication date: 2021-07-16
Anticipated expiration: 2030-10-10

Abstract

The utility model discloses a general straight tube pressure balance type metal ripple expansion joint, including first bellows, first bellows both ends all are equipped with first takeover, and two first takeovers are close to first bellows one side and outwards continue to form annular protruding edge portion, are the first pull rod connection that the annular distributes through the equidistance between two annular protruding edge portions first bellows one end is kept away from to first takeover and is the throat structure, and two first takeover throat end all welds the second bellows, two the second bellows is kept away from first bellows one end and all welds the second and is taken over, all is equipped with fixed subassembly between two second takeovers and two first takeovers. The utility model discloses be favorable to promoting the stretch-proofing ability of expansion joint, conveniently adjust the length of inflation head, adjust the shock attenuation effect, satisfy different pipeline needs, reach better axial and inhale shake effect, better equilibrium pressure.

Description

Universal straight pipe pressure balance type metal corrugated expansion joint

Technical Field

The utility model relates to an expansion joint technical field especially relates to a general straight tube pressure balance type metal ripple expansion joint.

Background

An expansion joint refers to a flexible element that effectively functions to compensate for axial deformation. For example, the expansion joint welded on the shell of the fixed tube-plate heat exchanger has large axial flexibility and easy deformation, can compensate the thermal expansion difference generated by the tube and the shell due to different wall temperatures, and reduces the axial load of the tube and the shell, thereby reducing the temperature difference stress of the tube, the tube plate and the shell and avoiding causing strength damage, instability damage and tube pull-out damage. The expansion joint has many kinds, and the common structures include wave, ring plate welding, clamping shell type and the like, wherein the wave expansion joint is most widely applied, and the ring plate welding expansion joint is only suitable for normal pressure or low pressure occasions.

The existing expansion joint has general pressure balancing capacity and tensile resistance, so that a general straight pipe pressure balancing type metal corrugated expansion joint is provided.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the defects existing in the prior art and providing a general straight pipe pressure balance type metal corrugated expansion joint.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a universal straight pipe pressure balance type metal corrugated expansion joint comprises a first corrugated pipe, wherein both ends of the first corrugated pipe are provided with first connecting pipes, and one side of the two first connecting pipes, which is close to the first corrugated pipe, is extended outwards to form an annular convex edge part, the two annular convex edge parts are connected through first pull rods which are distributed annularly at equal intervals, one ends of the two first connecting pipes, which are far away from the first corrugated pipe, are both in a necking structure, and the necking ends of the two first connecting pipes are welded with second corrugated pipes, the ends of the two second corrugated pipes far away from the first corrugated pipes are welded with second connecting pipes, fixed components are arranged between the two second connecting pipes and the two first connecting pipes, the fixing component comprises second pull rods which are distributed in an annular shape at equal intervals, connecting blocks are sleeved at the two ends of each second pull rod, one connecting block is welded with the side wall of the second connecting pipe, and the other connecting block is welded and fixed with the side wall of the first connecting pipe.

Preferably, a flared tube is welded in the second connecting tube, and a flow guide tube is screwed at one end of the flared tube.

Preferably, the inner walls of the two second connecting pipes are welded with metal ring sheets, and steel cables which are distributed annularly at equal intervals are connected between the two metal ring sheets.

Preferably, the side walls of the two metal ring pieces are provided with circular holes which are distributed in an annular shape at equal intervals, the inner wall of the circular hole on one metal ring piece is connected with a self-locking steel cable clamping head in a threaded mode, one end of the steel cable penetrates through the self-locking steel cable clamping head, and the other end of the steel cable penetrates through the circular holes on the two outer metal ring pieces.

Preferably, one end of the steel cable, which is far away from the self-locking steel cable clamping head, is provided with a limiting cap.

Preferably, the first corrugated pipe and the second corrugated pipe are both metal corrugated pipes, and the specification of the first corrugated pipe is larger than that of the second corrugated pipe.

The utility model has the advantages that:

through the cable wire that sets up, be favorable to promoting the stretch-proofing ability of expansion joint, the self-locking type cable wire dop that the cooperation set up simultaneously conveniently adjusts the length of expansion head, adjusts the shock attenuation effect, satisfies different pipeline needs, and the first bellows that sets up combines two second bellows, reaches better axial and inhales shake effect, better equilibrium pressure.

Drawings

Fig. 1 is a schematic cross-sectional structural view of a general straight pipe pressure balance type metal corrugated expansion joint provided by the present invention;

fig. 2 is the utility model provides a structural schematic diagram of general straight tube pressure balance type metal ripple expansion joint becket piece.

In the figure: the steel cable connecting structure comprises a first corrugated pipe 1, a first connecting pipe 2, a second pull rod 3, a connecting block 4, a second connecting pipe 5, a horn pipe 6, a metal ring piece 7, a flow guide pipe 8, a second corrugated pipe 9, a steel cable 10, a self-locking steel cable clamping head 11 and a circular hole 12.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.

Referring to fig. 1-2, a universal straight pipe pressure balance type metal corrugated expansion joint comprises a first corrugated pipe 1, wherein first connecting pipes 2 are arranged at two ends of the first corrugated pipe 1, one side of each of the two first connecting pipes 2, which is close to the first corrugated pipe 1, is extended outwards to form an annular convex edge part, the two annular convex edge parts are connected through first pull rods which are distributed annularly at equal intervals, one ends of the two first connecting pipes 2, which are far away from the first corrugated pipe 1, are both in a necking structure, the necking ends of the two first connecting pipes 2 are both welded with second corrugated pipes 9, one ends of the two second corrugated pipes 9, which are far away from the first corrugated pipe 1, are both welded with second connecting pipes 5, a fixing component is arranged between the two second connecting pipes 5 and the two first connecting pipes 2, the fixing component comprises second pull rods 3 which are distributed annularly at equal intervals, connecting blocks 4 are sleeved at two ends of the second pull rods 3, one connecting block 4 is welded with, and the other connecting block 4 is fixedly welded with the side wall of the first connecting pipe 2.

The utility model discloses in, wherein the welded horn tube 6 in the 5 interior takeovers of second, and 6 one end spiro union of horn tube has honeycomb duct 8, 5 inner walls all welds metallic ring piece 7 are taken over to two seconds, and be connected with the cable wire 10 that the equidistance is the annular distribution between two metallic ring pieces 7, two metallic ring piece 7 lateral walls are all opened the round hole 12 that has the equidistance to be the annular distribution, and the round hole inner wall spiro union on one of them metallic ring piece 7 has from locking-type cable wire dop 11, cable wire 10 one end is passed from locking-type cable wire dop 11, and cable wire 10 other one end passes the round hole on two outer metallic ring pieces 7, cable wire 10 keeps away from locking-type cable wire dop 11 one end and is equipped with spacing cap, first bellows 1 and second bellows 9 are corrugated metal pipe, and first bellows 1's.

The working principle is as follows: through two second takeovers 2, in installing suitable pipeline with the expansion joint, cable wire 10 is favorable to promoting the stretch-proofing ability of expansion joint, and the self-locking type cable wire dop 11 that the cooperation set up simultaneously can adjust the length of expansion head through pulling cable wire 10, adjusts the shock attenuation effect, satisfies different pipeline needs, and the first bellows 1 of setting combines two second bellows 9, reaches better axial shock absorption effect.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims

1. A universal straight pipe pressure balance type metal corrugated expansion joint comprises a first corrugated pipe (1) and is characterized in that first connecting pipes (2) are arranged at two ends of the first corrugated pipe (1), one side of each of the two first connecting pipes (2) close to the first corrugated pipe (1) is outwards continued to form an annular convex edge portion, the two annular convex edge portions are connected through first pull rods which are distributed annularly at equal intervals, two ends, far away from the first corrugated pipe (1), of the first connecting pipes (2) are both in a necking structure, the necking ends of the two first connecting pipes (2) are both welded with second corrugated pipes (9), one ends, far away from the first corrugated pipe (1), of the two second corrugated pipes (9) are both welded with second connecting pipes (5), fixing assemblies are arranged between the two second connecting pipes (5) and the two first connecting pipes (2), each fixing assembly comprises second pull rods (3) which are distributed annularly at equal intervals, and connecting blocks (4) are sleeved at two ends of the second pull rod (3), one connecting block (4) is welded with the side wall of the second connecting pipe (5), and the other connecting block (4) is welded and fixed with the side wall of the first connecting pipe (2).

2. The universal straight pipe pressure balance type metal corrugated expansion joint as claimed in claim 1, wherein a flared pipe (6) is welded in the second connecting pipe (5), and a flow guide pipe (8) is screwed at one end of the flared pipe (6).

3. The universal straight pipe pressure balance type metal corrugated expansion joint as claimed in claim 2, wherein metal ring sheets (7) are welded to the inner walls of the two second connecting pipes (5), and steel cables (10) which are distributed annularly at equal intervals are connected between the two metal ring sheets (7).

4. The universal straight pipe pressure balance type metal corrugated expansion joint as claimed in claim 3, wherein the two metal ring pieces (7) are provided with circular holes (12) distributed annularly at equal intervals on the side wall, and the inner wall of the circular hole on one metal ring piece (7) is screwed with a self-locking steel cable clamp (11), one end of the steel cable (10) passes through the self-locking steel cable clamp (11), and the other end of the steel cable (10) passes through the circular holes on the two outer metal ring pieces (7).

5. The universal straight pipe pressure balance type metal corrugated expansion joint as claimed in claim 4, wherein a limiting cap is arranged at one end of the steel cable (10) far away from the self-locking steel cable clamping head (11).

6. A universal straight pipe pressure balanced metal bellows expansion joint according to claim 5, wherein the first bellows (1) and the second bellows (9) are both metal bellows, and the first bellows (1) has a larger gauge than the second bellows (9).