CN208778972U

CN208778972U - Vacuum-resistant polytetrafluoroethylene (PTFE) expansion joint

Info

Publication number: CN208778972U
Application number: CN201821439694.9U
Authority: CN
Inventors: 姜爱荣
Original assignee: JIANGSU CHANGFENG CORRUGATED PIPE Co Ltd
Current assignee: JIANGSU CHANGFENG CORRUGATED PIPE Co Ltd
Priority date: 2018-09-03
Filing date: 2018-09-03
Publication date: 2019-04-23
Anticipated expiration: 2028-09-03

Abstract

The utility model discloses a kind of vacuum-resistant polytetrafluoroethylene (PTFE) expansion joints, the recess of metal bellows outer tube wall is respectively fixedly welded an outer annular-stiffer, outer annular-stiffer is bicyclic reinforcement structure, include an inner ring and an outer ring, inner ring and outer rings are fixedly welded, and the recess of metal bellows inner tubal wall is respectively fixedly welded reinforcing ring in one, and interior reinforcing ring is also bicyclic reinforcement structure, reinforce outer ring and one comprising one and reinforce inner ring, reinforces outer ring and be fixedly connected with interannular in reinforcement by more reinforcing rods.The vacuum-resistant polytetrafluoroethylene (PTFE) expansion joint of the utility model is provided with a metal bellows on the body, an outer annular-stiffer has respectively been welded in the recess of wavy metal pipe outer wall, an interior reinforcing ring has respectively been welded in the recess of wavy metal inside pipe wall, the intensity for effectively improving bellows in the case where not increasing bellows tube body thickness in this way, also improves the vacuum-resistant of expansion joint.

Description

Vacuum-resistant polytetrafluoroethylene (PTFE) expansion joint

Technical field

The utility model relates to a kind of vacuum-resistant polytetrafluoroethylene (PTFE) expansion joints.

Background technique

Expansion joint is for compensation because of additional stress caused by temperature difference and mechanical oscillation, and is arranged in container casing or pipeline On a kind of flexible structure.Due to a kind of its elastic compensation element as energy free extension, have reliable operation, performance good It the advantages that good, compact-sized, has been widely used in departments such as chemical industry, metallurgy, nuclear energy.Polytetrafluoroethylene (PTFE) expansion joint is expansion joint One kind, this expansion joint are used for the higher pipeline of vacuum degree sometimes, and the external pressure that such metal bellows is subject to is more Huge, general bellows is difficult to bear, and the pipe thickness for thickening bellows then will affect its telescopicing performance.

Utility model content

The utility model mainly solves technical problem present in the prior art, to provide a kind of vacuum-resistant polytetrafluoro Ethylene expansion joint.

Above technical problems of the utility model are mainly solved by the following technical scheme:

A kind of vacuum-resistant polytetrafluoroethylene (PTFE) expansion joint includes a metal bellows, and one end of the metal bellows is fixed Left end pipe is connected, the end of the left end pipe is fixedly connected with a Zuo Falan, and the other end of the metal bellows is fixedly connected One right end pipe, the end of the right end pipe are fixedly connected with a right flange, each fixation of recess of the metal bellows outer tube wall An outer annular-stiffer is welded, it includes an inner ring and an outer ring, the inner ring and outer rings are that the outer annular-stiffer, which is bicyclic reinforcement structure, Concentric ring, the inner ring and outer rings are fixedly welded, and the recess of the metal bellows inner tubal wall, which is respectively fixedly welded in one, to be reinforced Ring, the interior reinforcing ring are also bicyclic reinforcement structure, reinforce outer ring and one comprising one and reinforce inner ring, the reinforcement outer ring and reinforcement Inner ring is concentric ring, and the reinforcement outer ring is fixedly connected with interannular in reinforcement by more reinforcing rods, the left end pipe, right end pipe A polytetrafluoroethylene (PTFE) protective layer is equipped with the inner wall of metal bellows.

As the utility model preferred embodiment, the reinforcement outer ring reinforces inner ring and reinforcing rod integrated molding.

As the utility model preferred embodiment, the quantity of the reinforcing rod is no less than four.

The vacuum-resistant polytetrafluoroethylene (PTFE) expansion joint of the utility model is provided with a metal bellows on the body, in metal The recess of ripple pipe outer wall has respectively welded an outer annular-stiffer, has respectively welded in one in the recess of wavy metal inside pipe wall Reinforcing ring effectively improves the intensity of bellows in the case where not increasing bellows tube body thickness in this way, also improves expansion The vacuum-resistant of section.

Detailed description of the invention

In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor Under, it is also possible to obtain other drawings based on these drawings.

Fig. 1 is the structural schematic diagram of the vacuum-resistant polytetrafluoroethylene (PTFE) expansion joint of the utility model；

Fig. 2 is the structural schematic diagram of interior reinforcing ring；

Fig. 3 is the structural schematic diagram of outer annular-stiffer.

Specific embodiment

The preferred embodiment of the utility model is described in detail with reference to the accompanying drawing, so that the advantages of the utility model It can be easier to be readily appreciated by one skilled in the art with feature, to make the protection scope of the utility model apparent clear Define.

As shown in Figure 1-3, a kind of vacuum-resistant polytetrafluoroethylene (PTFE) expansion joint 1, includes a metal bellows 3, the metal wave One end of line pipe 3 is fixedly connected with a left end pipe 2, and the end of the left end pipe 2 is fixedly connected with a left flange 5, the wavy metal The other end of pipe 3 is fixedly connected with a right end pipe 4, and the end of the right end pipe 4 is fixedly connected with a right flange 6, the wavy metal The recess of 3 outer tube wall of pipe is respectively fixedly welded an outer annular-stiffer 7, and it includes an inner ring that the outer annular-stiffer 7, which is bicyclic reinforcement structure, 71 and an outer ring 72, the inner ring 71 and outer ring 72 are concentric ring, and the inner ring 71 and outer ring 72 are fixedly welded, the metal wave The recess of 3 inner tubal wall of line pipe is respectively fixedly welded reinforcing ring 8 in one, and it includes one that the interior reinforcing ring 8, which is also bicyclic reinforcement structure, Reinforce outer ring 81 and one and reinforce inner ring 82, the reinforcement outer ring 81 and reinforcement inner ring 82 are concentric ring, 81 He of reinforcement outer ring Reinforce being fixedly connected between inner ring 82 by more reinforcing rods 83, the inner wall of the left end pipe 2, right end pipe 4 and metal bellows 3 is set There is a polytetrafluoroethylene (PTFE) protective layer 9.

It is further improved as to the utility model, the reinforcement outer ring 81 reinforces inner ring 82 and reinforcing rod 83 It is integrally formed.

It is further improved as to the utility model, the quantity of the reinforcing rod 83 is no less than four.

The mentality of designing for only illustrating the utility model in one embodiment above, in the case where system allows, The utility model can be extended to while external more functional modules, to extend its function to greatest extent.

Above description is only a specific implementation of the present invention, but the protection scope of the utility model is not limited to In this, any change or replacement expected without creative work be should be covered within the scope of the utility model. Therefore, the protection scope of the utility model should be determined by the scope of protection defined in the claims.

Claims

1. a kind of vacuum-resistant polytetrafluoroethylene (PTFE) expansion joint (1), which is characterized in that include a metal bellows (3), the metal wave One end of line pipe (3) is fixedly connected with left end pipe (2), and the end of the left end pipe (2) is fixedly connected a Zuo Falan (5), described The other end of metal bellows (3) is fixedly connected with a right end pipe (4), and the end of the right end pipe (4) is fixedly connected with a right flange (6), the recess of metal bellows (3) outer tube wall is respectively fixedly welded an outer annular-stiffer (7), and the outer annular-stiffer (7) is Bicyclic reinforcement structure includes an inner ring (71) and an outer ring (72), and the inner ring (71) and outer ring (72) are concentric ring, described interior Ring (71) and outer ring (72) are fixedly welded, and the recess of metal bellows (3) inner tubal wall is respectively fixedly welded reinforcing ring in one (8), the interior reinforcing ring (8) is also bicyclic reinforcement structure, reinforces outer ring (81) and one comprising one and reinforces inner ring (82), described to add Strong outer ring (81) and reinforcement inner ring (82) are concentric ring, pass through more reinforcements between the reinforcement outer ring (81) and reinforcement inner ring (82) Bar (83) is fixedly connected, and the inner wall of the left end pipe (2), right end pipe (4) and metal bellows (3) is anti-equipped with a polytetrafluoroethylene (PTFE) Sheath (9).

2. vacuum-resistant polytetrafluoroethylene (PTFE) expansion joint according to claim 1, which is characterized in that the reinforcement outer ring (81), reinforce inner ring (82) and reinforcing rod (83) is integrally formed.

3. vacuum-resistant polytetrafluoroethylene (PTFE) expansion joint according to claim 2, which is characterized in that the reinforcing rod (83) Quantity is no less than four.