CN2049302U

CN2049302U - Casing telescopic device

Info

Publication number: CN2049302U
Application number: CN 89204281
Authority: CN
Inventors: 赵铎
Original assignee: Individual
Current assignee: Individual
Priority date: 1989-04-07
Filing date: 1989-04-07
Publication date: 1989-12-13

Abstract

The utility model relates to a novelcasing tube telescopic device which is a telescopic device connected to a pipeline; a flexible rubber casing tube is used for sealing. The utility model has the advantages of high reliability, long service life, low cost, small size, lightness, damage prevention, convenient installation and maintenance, and is characterized in that the requirement of the machining accuracy is not high; the concentricity between the axial lead of the pipeline and the axial lead of a compensator; the telescopic resistance of the pipeline is reduced.

Description

Casing telescopic device

The present invention relates to a kind of new casing expansion bend, belong to a kind of expansion device that is connected on the pipeline.

From present closed conduit expansion bend as can be known, its feature is to utilize liquid or gas in the pipeline to make the seal ring sealing, it has had very big improvement than the sealing material of old-fashioned filler expansion bend from prior art, and the pressure of medium is converted into sealing load, make it have superiority, its deficiency is: the sealing material of this expansion bend has been subjected to very big frictional force, thereby wearing and tearing are still very serious, during as sealing material wearing and tearing inequality, also can cause the phenomenon of leaking.

A kind of new casing expansion bend of providing avoiding above-mentioned deficiency of the prior art is provided, and its feature is to adopt the soft rubber bobbin seal, and sealability is reliable.

Purpose of the present invention can reach by following measure, flexible pipe one end is fixed with the flange plate of sleeve shell flange plate and conduit, the other end fixes with pipe clamp that (or two ends stick with glue, also can flexible pipe be connected with the pipe of metal) with heat-treating methods, such two end interfaces are tight, because the bearing capacity of flexible pipe is very high, not fragile, so good seal performance, long service life.

Working principle of the present invention is that expansion bend is connected with pipeline, when the medium temperature that flows through pipeline raises, this moment, pipeline increased, and the expansion bend inner sleeve is to the expansion bend internal motion, and temperature rises to when the highest, Fig. 1 is seen in the position of inner sleeve, when the medium temperature in the pipeline was low, pipeline shortened, and inner sleeve outwards moves, when temperature was minimum, the spacing of inner sleeve touched mutually with conduit.

Installation of the present invention is that inner sleeve 3 is inserted in the conduit 2, on inner sleeve 3, weld a limited ring 6 then, flexible pipe 4 is enclosed within on conduit 2 and the inner sleeve 3 again, and be fixed on the inner sleeve 3 with the end of pipe clamp 5 with flexible pipe 4, make it tight (or be adhesively fixed or with heat treatment method flexible pipe 4 with inner sleeve 3 be connected with rubber liquid).Above-mentioned connecting body is put into outer sleeve 1, use flange plate connecting duct 2 and outer sleeve 1, and make it sealing with the flexible pipe flange gasket.

The accompanying drawing drawing is described as follows:

Fig. 1: the sectional drawing of sleeve pipe expansion bend;

Fig. 2: pipe clamp detailed drawing.

Wherein: 1-sleeve pipe, 2-conduit, 3-inner sleeve, 4-flexible pipe, 5-pipe clamp 6-limited ring, 7-seat board, 8-stiffening rib, 9-circular hole.

The present invention's advantage compared to existing technology is: requirement on machining accuracy is not high, cost is low, good seal performance, volume is little, in light weight, two adjacent expansion device outer tube seat boards are rack-mount, guaranteed the concentricity of pipeline axial line and expansion bend axial line, thereby reduced the flexible resistance of pipeline, installation and maintenance in addition just.

Embodiment: nominal diameter Dg is 80mm, and accompanying drawing is for being applicable to operating temperature-20 ℃～+ 150 ℃, (do the temperature of corrugated bushing for butyl rubber, if adopt silicone rubber to do corrugated bushing, operating temperature can reach-100 ℃-+200 ℃).Working pressure Pg≤16kg/cm ²Extending amount is 200mm, and extending amount can increase according to actual needs, and flexible pipe 4 can be selected the butyl rubber sleeve pipe for use as required, also can select the silicone rubber tube road for use, also can select for use the soft material of other type to replace, and all the other parts are all made with carbon steel.

Claims

1, a kind of new casing expansion bend is made up of sleeve pipe 1, conduit 2, inner sleeve 3, limited ring 6, seat board 7, stiffening rib 8 and circular hole 9, it is characterized in that being with flexible pipe 4 on conduit 2 and the inner sleeve 3, and pipe clamp 5 is that the end with flexible pipe 4 is fixed on the inner sleeve.

2, expansion bend according to claim 1 is characterized in that flexible pipe 4 can select the butyl rubber sleeve pipe for use as required, also can select silicone rubber tube road or other soft material for use.

3, expansion bend according to claim 1 is characterized in that the also available heat-treating methods of flexible pipe 4 and inner sleeve 3 is connected, and also available rubber liquid is adhesively fixed.