CN2144232Y

CN2144232Y - Telescopic joint

Info

Publication number: CN2144232Y
Application number: CN 92216637
Authority: CN
Inventors: 孙萍
Original assignee: Individual
Current assignee: Individual
Priority date: 1992-07-31
Filing date: 1992-07-31
Publication date: 1993-10-20
Anticipated expiration: 2002-07-31

Abstract

The utility model discloses an expansion joint, which uses inner limit mode and comprises an outer tube, a retainer ring, an inner tube, a packing ring and seal rings. One end of the outer tube is provided with the retainer ring, the other end is connected with the flanges of pipelines, the inner tube is in the circular hole of the outer tube, one end of the inner tube is connected with the packing ring, the excircle of the packing ring is provided with a circular bead, and the contact surface between the packing ring and the inner holes of the outer tube is provided with a plurality of seal rings. The utility model has the advantages that the structure is simple, and the seal rings are changed easily; besides the expansion joint can prevent constructional detail being lost. The utility model is used for the fluid pipeline transportation technical field of the industrial and mining establishments of blackness mine, non-ferrous metal, metallurgy, power plant, petrochemical industry, food, medicine, etc.

Description

Telescopic joint

The utility model relates to a kind of slurry transportation pipeline slip joint.

On the pipeline that slurry is carried, when causing expanding with heat and contract with cold of pipeline, need to install slip joint or the compensator that compensation is expanded with heat and contract with cold, thereby guarantee the works fine state of pipeline owing to temperature variation.Existing slip joint is to take outer limit method, promptly a pair of flange and the several screw rod by the telescopic pipe outside comes spacing, therefore structure is complicated, when seal ring damages, need slip joint is removed from pipeline, can change seal ring, because the slip joint major part is installed on the open-air conveyance conduit, the spacing screw rod that exposes is easy to unload to cause from pipeline lose, and causes pipeline accident because of losing screw rod, also happens occasionally.

The purpose of this utility model provides a kind of simple in structure, changes seal ring and conveniently can prevent the slip joint that part is lost again.

For achieving the above object, the utility model is taked interior limit method, and it comprises outer tube, back-up ring, interior pipe, seal ring and seal ring, and an end of outer tube is equipped with back-up ring, and the other end connects with the flange of pipeline; Interior pipe is in the circular hole of outer tube; One end of interior pipe connects with seal ring, and the cylindrical of seal ring has a shoulder, and the endoporus surface of contact of seal ring and outer tube is equipped with several seal rings.When the pipeline generation was expanded with heat and contract with cold, outer tube slided on inner pipe by back-up ring thereupon, thereby reached the flexible regulating action of pipeline, and back-up ring has then played the position-limiting action of control extending amount with the shoulder of seal ring.

The utility model is compared with prior art, because position-limit mechanism is in inside, thereby structure is comparatively simple, the disadvantage of also having avoided position-limit mechanism to lose easily simultaneously; When changing seal ring, only need open flange, it is promptly replaceable, more convenient compared to prior art that the seal ring that is installed on the seal ring shoulder is just exposed in the inside promotion of outer tube.

Description of drawings: Fig. 1 is the structural representation of the utility model at limit position.

Below in conjunction with Fig. 1 the utility model is further described.

The utility model is made up of outer tube 3, back-up ring 1, interior pipe 2, seal ring 4 and seal ring 5.One end of outer tube 3 is equipped with back-up ring 1, and the other end connects with the flange 6 of pipeline, and in this example, outer tube 3 adopts welding to be associated in back-up ring 1 and flange 6, also can be with peace cast solid.Interior pipe 2 is in the circular hole of outer tube 3, one end of interior pipe 2 connects with seal ring 4, this connection also can be adopted welding manner, the cylindrical of seal ring 4 has a shoulder, the outside diameter of seal ring 4 shoulders just equals the aperture of outer tube 3, and back-up ring 1 aperture just equals the outside diameter of interior pipe 2, and interior like this pipe 2 relies on the shoulders of seal rings 4 in the slip of the hole, hole of outer tube 3, and in like manner outer tube 3 relies on back-up rings 1 to slide on interior pipe 3.In order to prevent the leakage of slurry in the pipeline, on the endoporus surface of contact of seal ring 4 and outer tube 3 the general twice of several seal ring 5(" O " RunddichtringO being installed can meet the demands).Distance between the shoulder of back-up ring 1 and seal ring 4 is the extending amount of pipeline, and this extending amount can design according to actual needs, and therefore, the shoulder of back-up ring 1 and seal ring 4 plays the position-limiting action of control extending amount.

When the utility model is installed, the ambient temperature in the time of at first should considering to install.When installing summer, should take limit position shown in Figure 1, i.e. the position of the extending amount maximum of slip joint; Should take the limit position of the extending amount minimum of slip joint when installing in the winter time; When spring and autumn is installed, can take the moderate position of extending amount of slip joint.During installation, interior pipe 2 can adopt welding manner with connecting of pipeline.

During use, when shrinking (extending amount that is slip joint increases) when pipeline needs slip joint because of expanding with heat and contract with cold, do from motion with the back-up ring 1 that connects with outer tube 3 with the seal ring 4 that interior pipe 2 connects, to regulate the contour projector of pipeline, till the shoulder of seal ring 4 contacts with the end face of flange that links to each other with outer tube 3.In like manner, when pipeline needed slip joint elongation (extending amount that is slip joint reduces) because of shrinkage face, seal ring 4 and 1 of back-up ring were made move toward one another regulating the extending amount of pipeline, up to the shoulder of seal ring 4 with till back-up ring 1 contacts.

When changing seal ring 5, open the flange 6 that outer tube 3 connects with pipeline, it is promptly replaceable that the seal ring that is installed on seal ring 4 shoulders is just exposed in outer tube 3 inside promotions, and then with the outer tube 3 extensive original positions that get.

Claims

1, a kind of slip joint, draw together outer tube, back-up ring, interior pipe, seal ring and seal ring outward, it is characterized in that: an end of outer tube is equipped with back-up ring, the other end connects with the flange of pipeline, interior pipe is in the circular hole of outer tube, one end of interior pipe connects with seal ring, and the cylindrical of seal ring has a shoulder, and the endoporus surface of contact of seal ring and outer tube is equipped with several seal rings.