CN2391085Y

CN2391085Y - Direct-buried sleeve compensator

Info

Publication number: CN2391085Y
Application number: CN 99238588
Authority: CN
Inventors: 陈述增; 刘正全; 王筱峰
Original assignee: Individual
Current assignee: Individual
Priority date: 1999-09-22
Filing date: 1999-09-22
Publication date: 2000-08-09
Anticipated expiration: 2009-09-22

Abstract

The utility model relates to a direct-buried sleeve compensator, which is used on liquid transportation pipelines. The utility model has the technical proposal that an inner pipe is arranged in an outer pipe, one end of the inner pipe extends out of the outer pipe, the outer wall of the extending part of the inner pipe is provided with a heat-insulating layer, and a sealing ring is arranged on the heat-insulating layer. The sealing ring is provided with a sealing cover which is arranged on one end head of the outer pipe, the other end of the outer pipe is provided with a sealing head, a sealing ring is arranged between the inner pipe and the inner wall of the outer pipe, and both ends of the sealing ring are pressed and fixed by a baffle ring arranged on the inner pipe and a fastening bolt on a fixed ring. The utility model has the advantages of unique structure, stable and reliable performance and thermal insulation of the inner and the outer pipes, and the utility model can be directly buried under the ground without the interference of water, soil, sand, etc.

Description

The directly buried type sleeve expansion joint

The utility model relates to the directly buried type sleeve expansion joint used on a kind of pipe-line for conveying liquids.

Compensator is long apart from device commonly used on the liquid conducting pipes, as heat distribution pipeline, chemical petroleum pipeline, thermoelectricity plant's pipeline etc.And the compensator that uses at present mainly is by the inner and outer pipes bipartition, and flange is arranged on the outer tube, and gland is arranged on the flange, flange is welded on the outer tube, and flange and gland are compressed by screw, and sealing material is arranged between inner and outer pipes, and push down by gland, this slip-type expansion joint heat insulation effect is poor, even can't be incubated, sand, soil, water easy to leak can not directly be buried underground, will dig a generous hole during construction, both bothered, investment is big again, and time-consuming, using effect is unsatisfactory.

The purpose of this utility model provides a kind of improved novel directly buried type sleeve expansion joint, can solve the using effect difference effectively and bury inconvenient problem underground.

The purpose of this utility model is achieved like this, between internal and external casing, adorn seal ring, outside the interior pipe thermal insulation layer is arranged, thermal insulation layer has exterior seal ring outward, sealing cover is housed on it, and outer tube is welded with end socket on the termination, and the end socket aperture is identical with the inner orifice footpath, there is baffle ring at seal ring rear portion between internal and external casing, and there are retaining ring and clamping bolt in the front portion.

The utility model structure uniqueness, stable and reliable for performance, profile is succinct, the inner and outer pipes exposed parts all can be incubated, and during construction, directly is embedded in underground, be not subjected to interference such as underground water, soil, sand when compensating work, the self friction resistance is little, is convenient to design and installation, has good economic and social benefit.

Below in conjunction with accompanying drawing structure of the present utility model is elaborated.

Fig. 1 is structural front view of the present utility model (half one cuts open).

Fig. 2 is the left view of the utility model structure.

Fig. 3 is the right elevation of the utility model structure.

By shown in Figure 1, the utility model is to be made of inner and outer pipes two-part, interior pipe 2 is contained in the outer tube 1 and an end stretches out outer tube, interior pipe 2 stretches out on the outer tube 1 part outer wall thermal insulation layer 3 is arranged, thermal insulation layer 3 outer outer pipe 2 ends have exterior seal ring 10, sealing cover 4 is housed on it, sealing cover is on outer tube 2 terminations, end socket 7 is welded on outer tube 1 another termination, in pipe 2 seal ring 6 is arranged at the inner outer wall that divides of outer tube 1 between with outer tube 1 inwall, seal ring 6 two ends are pressed solidly by baffle ring 8 on the pipe 2 in being contained in and the clamping bolt on the retaining ring 5, in baffle ring 8 is contained in by screw thread on pipe 2 inner termination, exterior seal ring 10 is used for waterproof, anti-soil, sand controls etc., end socket 7 apertures are identical with interior pipe 2 internal orifice dimension sizes.

In use, the interface tube latus rectum can be DN50-DN1200 in the utility model, operating temperature is-40 ℃≤550 ℃, be situated between and claim pressure P N≤2.5MP, compensation rate Δ L≤250mm, when Δ L＞250mm, can be by the special processing of design, when fed sheet of a media has corrosion, can adopt acidproof, alkaline-resisting material to manufacture.

Show by said structure, what the together existing ordinary cartridge compensator of the utility model was different is because structural improvement, stuffing box packing and outer sleeve generation relative movement when making compensator work, then relative with interior pipe static, cancel the flange on the outer tube simultaneously and compressed short tube etc., both dwindled the installation width, all shortcomings of insulation antiseptic of the interior pipe of ordinary casing compensator have been overcome again, safe and reliable, using effect is good, particularly solved the problem that compensator can not direct-burried, the utility model direct-burried is underground not to be subjected to underground water when compensating work, soil, sand equals to disturb, and the self friction resistance is little, highly beneficial construction, be ideal product in the directly buried pipeline engineering, have wide application market and remarkable economical and social benefit.

Claims

1, the directly buried type sleeve expansion joint, be to constitute by inner and outer pipes two-part, interior pipe is contained in the outer tube and an end stretches out outer tube, it is characterized in that interior pipe (2) stretches out on outer tube (1) the part outer wall thermal insulation layer (3) is arranged, outer outer pipe (2) end of thermal insulation layer (3) has exterior seal ring (10), sealing cover (4) is housed on it, sealing cover is on outer tube (2) termination, end socket (7) is welded on another termination of outer tube (1), in pipe (2) the inner branch between the same outer tube of outer wall (1) inwall seal ring (6) is arranged at outer tube (1), seal ring (6) two ends press solidly by being contained in baffle ring (8) on the interior pipe (2) and the clamping bolt on the retaining ring (5).

2, directly buried type sleeve expansion joint according to claim 1 is characterized in that end socket (7) aperture is identical with interior pipe (2) internal orifice dimension size.