CN2378602Y

CN2378602Y - Cross-road sleeve of underground direct-buried heat distribution pipeline

Info

Publication number: CN2378602Y
Application number: CN 99218383
Authority: CN
Inventors: 单茂堂; 孙贵明
Original assignee: Individual
Current assignee: Individual
Priority date: 1999-07-29
Filing date: 1999-07-29
Publication date: 2000-05-17
Anticipated expiration: 2009-07-29

Abstract

The utility model relates to a cross-road sleeve of underground direct-buried heat distribution pipelines, which is characterized in that an inner pipe used for conveying media is composed of a work pipe and a corrugated pipe which is connected with the work pipes, and a protective cover is arranged out of the corrugated pipe. A heat-insulating layer is arranged between an outer sleeve pipe, and the work pipes and the protective cover, and the work pipes at both ends of the outer sleeve pipe are connected with the outer sleeve pipe via blocking plates. The utility model not only has the advantages of good thermal insulation, strong corrosion resistance and long service life, but also has no thrust, no expansion and no additional compensators and fixed number when used, so the utility model can reduce systemic components, and capital and manpower investment.

Description

A kind of direct buried heat distribution pipeline is worn the road sleeve pipe

The utility model relates to a kind of road sleeve pipe of cuting through, and particularly a kind of direct buried heat distribution pipeline is worn the road sleeve pipe.

Usually; that lays that heat distribution pipeline adopts in places such as passing through the road stream wears the road sleeve pipe; its structure is by the working pipe that is used for fed sheet of a media mostly; being sleeved on the thermal insulation layer that is provided with between the outer sleeve that shields on the working pipe and working pipe and outer sleeve constitutes; and at the two ends of its outer sleeve or the one end seal by stuffing box packing and freely stretch when guaranteeing in the outer sleeve unlikely water inlet and working pipe work with this; during the wearing the road sleeve pipe and use of this structure; not only needing to install compensator expands with heat and contract with cold to pipeline and compensates; and will produce bigger end thrust when working because of service pipe; so also fixed buttress need be set on the service pipe; make it both increase the component of a system, also strengthened the input of fund and manpower.In addition then, this structure to wear road bobbin seal effect relatively poor, underground water is very easily just gone in thermal insulation layer, for guaranteeing heat insulation effect, reduce the corrosion of underground water, need every 1-2 that stuffing box packing is once changed, prolong its working life with this to working pipe, and maintenance each time must destroy the road surface, also will cause unnecessary loss.

The purpose of this utility model is to provide a kind of direct buried heating power to wear the road sleeve pipe, and its no thrust, nothing expand, good sealing effect, long service life.

Concrete solution is: the interior pipe that is used for fed sheet of a media is made of working pipe and connected bellows; and bellows is outside equipped with a safety cover; be provided with thermal insulation layer between outer sleeve and working pipe and safety cover; and; be connected with closure plate between the working pipe at outer sleeve two ends and outer sleeve; can seal and eliminate the end thrust that working pipe produces to thermal insulation layer by it, and expanding with heat and contract with cold of working pipe be compensated by bellows.

The utility model is because the interior pipe of its fed sheet of a media is provided with bellows, and the two ends of outer sleeve are provided with stencil plate, so it not only can compensate expanding with heat and contract with cold of working pipe by bellows, the end thrust that produces in the time of can making work again acts on the stencil plate of outer sleeve two ends, equal and opposite in direction, direction is opposite, give balance by outer sleeve itself, simultaneously, also can realize better seal by two closure plates, make thermal insulating material remain drying, reach preferably heat insulation effect and have good corrosion resistance, its life-span was reached more than 15 years.Because this is worn does not have thrust when the road sleeve pipe uses, do not have and expand, need not peripheral hardware compensator and fixed buttress, thereby also significantly reduced the input of the component of a system and fund, manpower.

In conjunction with the accompanying drawings the utility model is described in detail below by embodiment:

Accompanying drawing is the utility model structural representation.

In the accompanying drawing; the middle part of working pipe (1) is connected with a bellows (4); be connected with a safety cover (6) on the bellows (4); thermal insulation layer (2) is arranged between outer sleeve (3) and working pipe and outer sleeve and the safety cover, is welded with closure plate (5) between the working pipe (1) at outer sleeve (3) two ends and the outer sleeve (3).

Claims

1, a kind of direct buried heat distribution pipeline is worn the road sleeve pipe; it is characterized in that the interior pipe that is used for fed sheet of a media is made of working pipe (1) and connected bellows (4); and bellows (4) is outside equipped with a safety cover (6); be provided with thermal insulation layer (2) between outer sleeve (3) and working pipe (1) and safety cover (6); and, be connected with closure plate (5) between working pipe at outer sleeve two ends (1) and outer sleeve (3).