CN210716511U

CN210716511U - Expansion joint

Info

Publication number: CN210716511U
Application number: CN201921817239.2U
Authority: CN
Inventors: 项志豪; 郑爱聪; 项光书
Original assignee: Wenzhou Aochen Bellows Co Ltd
Current assignee: Wenzhou Aochen Bellows Co Ltd
Priority date: 2019-10-28
Filing date: 2019-10-28
Publication date: 2020-06-09
Anticipated expiration: 2029-10-28

Abstract

The utility model discloses an expansion joint, including first end pipe, the right-hand member of first end pipe is linked together through the left end of first bellows and connecting pipe, the right-hand member of connecting pipe is linked together through the left end of second bellows and second end pipe, the upper surface and the lower surface of connecting pipe and second end pipe all are provided with the mounting panel. The utility model discloses in, through the telescopic link, first end pipe, the second end pipe, the connecting pipe, the second bellows, first pull rod, mutually support between second pull rod and the round pin axle, when this device bears certain angular load, relative rotation between first end pipe and the connecting pipe this moment, first pull rod and second pull rod can guarantee to stabilize to rotate between first end pipe and the connecting pipe simultaneously, this device gives second bellows and first bellows respectively axial, radial and angular load, can reduce the tired speed of first bellows and second bellows accumulation, guarantee the life of this device to a certain extent simultaneously.

Description

Expansion joint

Technical Field

The utility model relates to a pipe connection technical field especially relates to an 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.

A single corrugated pipe is additionally arranged in the conventional expansion joint to realize expansion, transverse movement and rotation of a compensation pipeline, so that the corrugated pipe can bear axial, radial and angular loads, more fatigue is accumulated for the corrugated pipe, and the service life of the whole expansion joint is reduced to a certain extent.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a: the expansion joint is provided for solving the problems that the bellows bears axial, radial and angular loads, more fatigue is accumulated in a short time, and the service life is reduced to a certain extent.

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

an expansion joint comprises a first end pipe, the right end of the first end pipe is communicated with the left end of a connecting pipe through a first corrugated pipe, the right end of the connecting pipe is communicated with the left end of the second end pipe through a second corrugated pipe, the upper surface and the lower surface of the connecting pipe and the second end pipe are both provided with mounting plates, the right side surface of the mounting plate is provided with a threaded cap, a threaded column is arranged in the threaded cap, the right end of the threaded column is fixedly connected with the left side surface of the rotating plate, the right side surface of the rotating plate is fixedly connected with the left end of the rotating shaft, and the opposite ends of the two rotating shafts below are provided with bearings which are respectively fixedly connected with the two ends of the telescopic rod, the front and the back of the connecting pipe are both provided with a first pull rod, the first pull rod is movably connected with a second pull rod through a pin shaft, and the second pull rod is fixedly arranged on the front of the first end pipe.

As a further description of the above technical solution:

the first end pipe and the second end pipe are the same in size, and flanges are arranged at the ends, far away from each other, of the first end pipe and the second end pipe.

As a further description of the above technical solution:

the length of the first bellows is less than the length of the second bellows.

As a further description of the above technical solution:

the shape of rotor plate sets up to circular, and the surface of rotor plate is provided with anti-skidding line.

As a further description of the above technical solution:

the diameter of the connecting pipe is the same as that of the first end pipe, and the pin shaft is located in the middle of the first corrugated pipe.

To sum up, owing to adopted above-mentioned technical scheme, the beneficial effects of the utility model are that:

1. the utility model discloses in, through the telescopic link, first end pipe, the second end pipe, the connecting pipe, the second bellows, first pull rod, mutually support between second pull rod and the round pin axle, when this device bears axial load, the second bellows can be stretched, the telescopic link extension simultaneously, can carry out the buffer compensation to axial load this moment, when this device bears certain angular load, relative rotation between first end pipe and the connecting pipe this moment, first pull rod and second pull rod can guarantee to stabilize between first end pipe and the connecting pipe to rotate simultaneously, this device with the axial, radial and angular load divide respectively for second bellows and first bellows, can reduce the tired speed of first bellows and second bellows accumulation, guarantee the life of this device to a certain extent simultaneously.

2. The utility model discloses in, through setting up screw thread post and screw cap, can guarantee the stable connection between telescopic link both ends and the mounting panel, prevent to appear rocking relatively between telescopic link and the mounting panel.

3. The utility model discloses in, through setting up first bellows, first pull rod, round pin axle and second pull rod, first pull rod and second pull rod can guarantee that stable rotation going on between connecting pipe and the first end pipe guarantees that first bellows bears angular load and slight radial load.

Drawings

Fig. 1 is a schematic front view of an expansion joint according to the present invention;

fig. 2 is an enlarged schematic structural view of a portion a of an expansion joint according to the present invention;

fig. 3 is a schematic top view of the first pull rod of the expansion joint according to the present invention.

Illustration of the drawings:

1. a first end tube; 2. a second end tube; 3. a first bellows; 4. a connecting pipe; 5. a second bellows; 6. mounting a plate; 7. a threaded cap; 8. a threaded post; 9. a rotating plate; 10. a rotating shaft; 11. a bearing; 12. a telescopic rod; 13. a flange; 14. a first pull rod; 15. a pin shaft; 16. a second pull rod.

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. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.

Referring to fig. 1-3, the present invention provides a technical solution: an expansion joint comprises a first end pipe 1, the right end of the first end pipe 1 is communicated with the left end of a connecting pipe 4 through a first corrugated pipe 3, the right end of the connecting pipe 4 is communicated with the left end of a second end pipe 2 through a second corrugated pipe 5, mounting plates 6 are arranged on the upper surface and the lower surface of the connecting pipe 4 and the second end pipe 2 respectively, the position of a telescopic rod 12 can be fixed conveniently by arranging the mounting plates 6, the stability of the limiting process of the telescopic rod 12 on the second corrugated pipe 5 can be ensured to a certain extent, a threaded cap 7 is arranged on the right side surface of the mounting plate 6, a threaded column 8 is arranged in the threaded cap 7, tight connection between the two ends of the telescopic rod 12 and the mounting plates 6 can be ensured by arranging the threaded column 8 and the threaded cap 7, the telescopic rod 12 is prevented from shaking, the right end of the threaded column 8 is fixedly connected with the left side surface of a rotating plate 9, and the, through the arrangement of the rotating plate 9, the bearings 11 and the rotating shafts 10, the threaded columns 8 at two ends can be conveniently rotated by workers respectively, the telescopic rod 12 can not rotate when the threaded columns 8 are rotated, the installation process of the telescopic rod 12 is convenient, the bearings 11 are arranged at the opposite ends of the two rotating shafts 10 below, the two bearings 11 are fixedly connected with the two ends of the telescopic rod 12 respectively, the extension of the second corrugated pipe 5 can be limited to the maximum extent by arranging the telescopic rod 12, the second corrugated pipe 5 is prevented from being directly broken or abnormally deformed, the relative rotation or dislocation between the connecting pipe 4 and the second end pipe 2 can be ensured, the second corrugated pipe 5 is ensured to be subjected to axial load, the front and the back of the connecting pipe 4 are provided with the first pull rods 14, the second pull rods 16 and the pin shafts 15, the horizontal moving away between the first end pipe 1 and the connecting pipe 4 can be prevented, meanwhile, the first end pipe 1 and the connecting pipe 4 can stably rotate around the pin shaft 15, the first corrugated pipe 3 can be bent to compensate angular load by 2, the first pull rod 14 is movably connected with the second pull rod 16 through the pin shaft 15, and the second pull rod 16 is fixedly arranged on the front surface of the first end pipe 1.

Specifically, as shown in fig. 1, the first end pipe 1 and the second end pipe 2 have the same size, and the flange 13 is arranged at the end, away from the first end pipe 1 and the second end pipe 2, of each end, and the flange 13 is arranged, so that the two ends of the device can be connected to the pipeline conveniently.

Specifically, as shown in fig. 1, the length of the first bellows 3 is smaller than the length of the second bellows 5, and the expansion and contraction amount of the second bellows 5 is ensured by setting the length of the second bellows 5 larger than the length of the first bellows 3.

Specifically, as shown in fig. 2, the shape of the rotating plate 9 is set to be circular, and the surface of the rotating plate 9 is provided with anti-skid threads, so that the rotating plate 9 is arranged, a worker can control the rotation of the threaded column 8 through the rotating plate 9, and the threads are prevented from scratching the worker.

Specifically, as shown in fig. 1, the diameter of the connecting pipe 4 is the same as the diameter of the first end pipe 1, the pin 15 is located at the middle position of the first corrugated pipe 3, the first corrugated pipe 3 is guaranteed to be at the middle position when being bent, and gaps are prevented from appearing at the two ends of the first corrugated pipe 3 and at the connection position of the connecting pipe 4 and the first end pipe 1.

The working principle is as follows: during the use, at first place the screw thread post 8 and correspond screw thread cap 7 position, then control rotor plate 9 drives screw thread post 8 and rotates, after screw thread post 8 and screw thread cap 7 zonulae occludens, accomplishes the installation to telescopic link 12 this moment, when this device bears axial load, the extension of second bellows 5 this moment, when this device bears angular load, relative appearance rotation between first end pipe 1 and the connecting pipe 4 this moment.

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. An expansion joint comprises a first end pipe (1), and is characterized in that the right end of the first end pipe (1) is communicated with the left end of a connecting pipe (4) through a first corrugated pipe (3), the right end of the connecting pipe (4) is communicated with the left end of a second end pipe (2) through a second corrugated pipe (5), mounting plates (6) are arranged on the upper surfaces and the lower surfaces of the connecting pipe (4) and the second end pipe (2), a threaded cap (7) is arranged on the right side surface of the mounting plate (6), a threaded column (8) is arranged in the threaded cap (7), the right end of the threaded column (8) is fixedly connected with the left side surface of a rotating plate (9), the right side surface of the rotating plate (9) is fixedly connected with the left end of a rotating shaft (10), a bearing (11) is arranged at one end of the lower two rotating shafts (10) opposite to each other, and two bearings (11) are respectively fixedly connected with the two ends of a telescopic rod (12), the front and the back of the connecting pipe (4) are both provided with a first pull rod (14), the first pull rod (14) is movably connected with a second pull rod (16) through a pin shaft (15), and the second pull rod (16) is fixedly arranged on the front of the first end pipe (1).

2. Expansion joint according to claim 1, characterized in that the first end pipe (1) and the second end pipe (2) are of the same size and that the ends of the first end pipe (1) and the second end pipe (2) facing away from each other are provided with a flange (13).

3. Expansion joint according to claim 1, characterized in that the length of the first bellows (3) is smaller than the length of the second bellows (5).

4. Expansion joint according to claim 1, characterized in that the shape of the rotation plate (9) is provided as a circle and the surface of the rotation plate (9) is provided with anti-slip threads.

5. Expansion joint according to claim 1, characterized in that the diameter of the connecting tube (4) is the same as the diameter of the first end tube (1) and the pin (15) is located in the middle of the first bellows (3).