CN203258284U

CN203258284U - Composite Teflon inner lining bellows compensator

Info

Publication number: CN203258284U
Application number: CN 201320265735
Authority: CN
Inventors: 卢树军
Original assignee: Jiangsu Huateng Pipeline Equipment Co Ltd
Current assignee: Jiangsu Huateng Pipeline Equipment Co Ltd
Priority date: 2013-05-16
Filing date: 2013-05-16
Publication date: 2013-10-30
Anticipated expiration: 2023-05-16

Abstract

The utility model discloses a composite Teflon inner lining bellows compensator which comprises flanges, a bellows and a Teflon inner lining, wherein the bellows is fixedly connected with the flanges at two ends to form a bellows compensating structure; the Teflon inner lining is attached to the inner surface of the bellows; the Teflon inner lining is formed by a Teflon inner lining plate and a Teflon membrane through composition; an elastic negative pressure ring is arranged in a circular groove in the inner wall of the bellows; the negative pressure ring is a ring-shaped component and is in small clearance fit with the Teflon inner lining in the annular groove in the inner wall of the bellows; the negative pressure ring is formed by an annular ring defined by an elastic metal wire in an enclosing mode and a Teflon outer lining wrapping the annular ring. The composite Teflon inner lining bellows compensator can significantly improve the density and the extending rate of the Teflon inner lining, and guarantees corrosion resistance of a bellows expansion joint; the negative pressure ring presses the Teflon inner lining, the Teflon inner lining cannot deform even under the action of negative pressure, therefore, normal using of the expansion joint with lining Teflon is guaranteed, and the composite Teflon inner lining bellows compensator has longer service life.

Description

Compound tetrafluoro liner corrugated expansion joint

Technical field

The utility model relates to a kind of pipe safety equipment, specifically, relates to a kind of lining tetrafluoro bellows expansion joint.

Background technique

Existing lining tetrafluoro bellows expansion joint comprises flange, bellows, tetrafluoro liner, and bellows is fixedly connected with the flange at two ends, consists of the bellows collocation structure, and the tetrafluoro liner is fitted in bellows inside surface, and the tetrafluoro liner is that sintering forms after being twined by polytetrafluoroethylene film.This lining tetrafluoro bellows expansion joint can not only be used for pipe-line system, play length, temperature, position and angle compensation effect, and owing to its liner tetrafluoro, so that it has again certain corrosion resistance, can be widely used in the pipe-line system of carrying Korrosionsmedium.But this lining tetrafluoro bellows expansion joint exists lower column defects: the tetrafluoro liner density that sintering forms after being twined by polytetrafluoroethylene film is low, extends rate variance, and crackle is easily arranged, and affects the corrosion resistance of bellows expansion joint.

The model utility content

The utility model provides a kind of and can significantly improve tetrafluoro liner density and specific elongation for the deficiencies in the prior art, guarantees the compound tetrafluoro liner corrugated expansion joint of the corrosion resistance of bellows expansion joint.

The utility model is achieved through the following technical solutions technical goal.

Compound tetrafluoro liner corrugated expansion joint comprises flange, bellows, tetrafluoro liner; Described bellows is fixedly connected with the flange at two ends, consists of the bellows collocation structure; Described tetrafluoro liner is fitted in bellows inside surface; Its improvements are: described tetrafluoro liner is composited by tetrafluoro liner plate and polytetrafluoroethylene film.

Further improve and be: in bellows inwall annular groove, be provided with the elastic negative pressure ring; Described negative pressure ring is circular member, and little Spielpassung between the tetrafluoro liner in the bellows inwall annular groove.

Further improve and be: the ring that described negative pressure ring is surrounded by elastic metallic yarn, the tetrafluoro outer lining that is coated on the ring form.

The utility model compared with prior art has following good effect:

1, the tetrafluoro liner is composited by tetrafluoro liner plate and polytetrafluoroethylene film, can significantly improve tetrafluoro liner density and specific elongation like this, having solved the tetrafluoro liner that sintering formed after polytetrafluoroethylene film twined in the prior art easily has crackle, affects the problem of the corrosion resistance of bellows expansion joint.

2, in bellows inwall annular groove, be provided with the elastic negative pressure ring, push down the tetrafluoro liner by the negative pressure ring, like this, even the tetrafluoro liner can not be out of shape under suction function, thereby guaranteed the normal use of lining tetrafluoro expansion joint yet.

3, the ring outer wall of negative pressure ring is coated with the tetrafluoro outer lining, has increased layer protective layer between negative pressure ring and tetrafluoro liner, the working life of significant prolongation lining tetrafluoro expansion joint.

Description of drawings

Fig. 1 is the utility model structural representation.

Fig. 2 is the local enlarged diagram of I part among Fig. 1.

Embodiment

The utility model is described in further detail with reference to the accompanying drawings and in conjunction with the embodiments for the below.

Compound tetrafluoro liner corrugated expansion joint shown in the drawings comprises flange 1, bellows 2, tetrafluoro liner 3; Bellows 2 is fixedly connected with the flange 1 at two ends, consists of the bellows collocation structure; Tetrafluoro liner 3 is fitted in bellows 2 internal surfaces; Tetrafluoro liner 3 is composited by tetrafluoro liner plate 3.1 and polytetrafluoroethylene film 3.2.

In the present embodiment, in bellows 2 inwall annular grooves, be provided with elastic negative pressure ring 4; Negative pressure ring 4 is circular member, and little Spielpassung between the tetrafluoro liner 3 in the bellows 2 inwall annular grooves; The ring 4.2 that negative pressure ring 4 is surrounded by elastic metallic yarn, the tetrafluoro outer lining 4.1 that is coated on the ring 4.2 form.

Claims

1. a compound tetrafluoro liner corrugated expansion joint comprises flange (1), bellows (2), tetrafluoro liner (3); Described bellows (2) is fixedly connected with the flange (1) at two ends, consists of the bellows collocation structure; Described tetrafluoro liner (3) is fitted in bellows (2) internal surface; It is characterized in that: described tetrafluoro liner (3) is composited by tetrafluoro liner plate (3.1) and polytetrafluoroethylene film (3.2).

2. compound tetrafluoro liner corrugated expansion joint according to claim 1 is characterized in that: be provided with elastic negative pressure ring (4) in bellows (2) inwall annular groove; Described negative pressure ring (4) is circular member, and little Spielpassung between the interior tetrafluoro liner (3) of bellows (2) inwall annular groove.

3. compound tetrafluoro liner corrugated expansion joint according to claim 2, it is characterized in that: the ring (4.2) that described negative pressure ring (4) is surrounded by elastic metallic yarn, the tetrafluoro outer lining (4.1) that is coated on the ring (4.2) form.