RU2236626C2 - Pipe desk for laying pipelines - Google Patents

Abstract

FIELD: pipeline engineering.

SUBSTANCE: pipe desk has straight pipeline for feeding heat carrier and return pipeline. The both of the pipes are covered with a load-carrying shell which is the base for the heat insulating layer protected against the atmosphere effect with the flowing material and provided with locators. The pipes in the load-carrying shell are mounted with a spaced relation which is no more than half diameter of the lesser of pipes.

EFFECT: decreased heat loss.

2 dwg

Description

The invention relates to a system for transferring heat from a boiler room to a consumer, preferably to above-ground heat pipes, in particular to pipe blocks for laying heat pipes.

Heat conduits for overhead installation are widely known, containing a heat-insulating layer in the form of ring fillers, insulated panels, see, for example, a.s. USSR No. 1613785 by class F 16 L, 59/00 of 03/03/1988, US patent No. 2532587 according to class. 138 - 146, the patent of Germany No. 2609478 by class. F 16 L 59/00, UK patent No. 1538550 for CL. F 16 L, 59/00 from 03/13/1979

Close to our technical solution is a tube block containing a monolithic rigid cage made of a heat-insulating material that has adhesion to the surface of the pipes, between which grooves are made from diametrically opposite sides of the casing, equidistant from the pipes and filled with a non-hardening sealant, see.c. USSR No. 1543175 by class F 16 L 59/00 dated 05/16/1990

A disadvantage of the known technical solution is the large heat loss during operation, inconvenience arising from accidents, and the possibility of defrosting at low temperatures. The closest in technical essence is the technical solution set forth in US patent No. 4303105 CL. 138-146 dated 12/01/1981, containing two coaxially placed pipes for the cryogenic product and its pairs, supplying an outer shell of non-woven material, which serves as the basis for a heat-insulating ring material, externally coated with a shell of non-woven material.

A disadvantage of the known technical solution is the high cost of one linear meter in the manufacture, which does not allow its use in the construction of heat pipes with a length measured in tens, hundreds or more linear meters. The aim of the invention is to reduce heat loss and the exclusion of the possibility of defrosting during accidents on one of the pipes.

This goal is achieved by the fact that in the known pipe block for laying heat conduits containing two pipes jointly coated with a supporting sheath, which serves as the basis for the heat-insulating layer, protected from the external influence of the atmosphere by a durable material equipped with clamps, one of the pipes in it is a direct supplying heat carrier and the second is the reverse, and placed in a bearing shell with a fixed gap of not more than half the diameter of the smaller of the pipes.

Placing the working coolant in one of the pipes and the spent one in the other allows to reduce heat loss, since two combined heat fluxes lose heat by heating one volume of a smaller heat-insulating layer, and in case of an accident in one of the pipes maintain a positive temperature, which reduces the possibility of defrosting.

The placement of pipes with a fixed gap of not more than half the diameter of the smaller of the pipes allows for repairs to be performed, both metalwork and welding, in the event of an accident.

On the other hand, the selected ratio reduces the amount of thermal insulation.

The invention is clarified when considering the drawings, in which Fig. 1 is a general view of a pipe block for laying a heat conductor, and Fig. 2 is a view along arrow A in Fig. 1.

The pipe block for laying heat pipes contains a pipe for operating the heat carrier - 1, a pipe for waste heat carrier - 2, which are jointly coated with a shell - 3, which serves as the basis for the heat-insulating layer - 4, which is protected from the external atmosphere by a durable material -5, such as aluminum foil, or fiberglass sheets.

The durable shell - 5 carries the clamps - 6, between the pipes there is a gap L, which is no more than half the diameter of the smaller of the pipes.

Detailed documentation has been developed for the pipe block for laying heat pipes.

Claims (1)

A pipe block for laying heat pipes, containing two pipes jointly coated with a supporting sheath, which serves as the basis for a heat-insulating layer protected from external atmospheric influences by a durable material equipped with clamps, characterized in that one of the pipes in it is straight - supplying coolant, and the second - the opposite, and the pipes are placed in the bearing shell with a fixed gap of no more than half the diameter of the smaller of the pipes.

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