CN101788201A

CN101788201A - Hot fluid transferring pipe

Info

Publication number: CN101788201A
Application number: CN201010143437A
Authority: CN
Inventors: 冯益安
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-03-06
Filing date: 2010-03-06
Publication date: 2010-07-28

Abstract

The invention provides a hot fluid transferring pipe, which belongs to the field of solar energy heat utilization. The invention mainly relates to a metal vacuum heat transferring pipe, which mainly solves the problems that the existing solar energy hot water transferring pipeline has poor heat insulation effect, is easy to be frozen in winter and can not be used. The hot fluid transferring pipe is structurally characterized in that the hot fluid transferring pipe has a two-pipe structure comprising an inner pipe and an outer pipe, the vacuum is formed between the two pipes, heat insulation materials with small heat transferring factors, such as polyurethane are used for foaming between the inner pipe and the outer pipe for fixation, the outer wall of the inner pipe is a black crude plating film or a coating, the inner wall of the outer pipe is a silvery white smooth reflecting layer, the outer wall of the outer pipe is a black light absorbing layer, and pipes are connected through expansion joints or one-step casting forming. The light reflecting coating and the light absorbing coating of the two pipes can be mutually changed when a cold fluid medium such as liquid ammonia and the like needs to be transferred in the production. The heat transferring pipe can be widely applied to various fields of cold and hot fluid transmission, and performs meritorious deeds never to be obliterated on energy conservation and transferring efficiency improvement.

Description

A kind of hot fluid transferring pipe

Technical field: the field of heat transfer of solar thermal utilization

Background technology:

Insulation material constantly develops, in solar heat transmission pipeline and various heating heat transfer tubes road, generally take the way of insulation material parcel pipeline, usually heat loss is bigger in application, particularly in winter since the solar energy water heater pipe that gap transmission hot in nature causes freeze finally cause can not using of solar water heater.In the heat transfer tube road, heat runs off serious, is a weak link.

Summary of the invention:

Transfer tube is inside and outside two pipe-in-pipe structures, it between two pipes vacuum, and it is fixing between inside and outside two pipes with heat transfer coefficient less insulation material such as polyurethane foam, outer wall of inner tube is coarse plated film of black or coating, outer tube wall is silvery white smooth reflector layer, outer tube outer wall is the black light-absorbing layer, connect between the tube and tube with an expansion joint or a cast molding, if need in producing transmission " cold " liquid as " liquid ammonia " wait only with the reverberation coating of two pipes and absorption light coating mutually co-conversion get final product.

Description of drawings:

Fig. 1 is the simplified schematic diagram of hot fluid transferring pipe.Fig. 2 is an inner and outer pipes expansion joint schematic diagram.In Fig. 1 Fig. 2, (1) is interior pipe, and (2) are vacuum layer, and (3) are black matsurface light-absorption layer for outer wall of inner tube, and (4) are outer tube wall, and (5) are the insulation material fixed support body.In Fig. 2, (1) is interior tube swelling joint, and (2) are the outer tube expansion joint.

The specific embodiment:

The key of heat insulation effect is the vacuum heat-insulating layer between inside and outside two pipes, because vacuum has been stopped hot conduction, but can not stop heat radiation scatters and disappears, so after vacuumizing between inside and outside two pipes, at outer tube inside and outside wall and outer wall of inner tube extinction or reflectance coating are arranged all, mainly be to absorb or reflected infrared ray, absorb extraneous infrared ray and not only make also possibility " heating " of interior hot fluid " insulation ".This depends primarily on environment temperature.The black plated film has the effect of the infrared ray of absorption, is applied in inside pipe wall and has the outer tube radiation of absorption and the catoptrical effect of outer tube, and the coarse extinction mask of outer tube outer wall has heat-absorbing action, also can add one deck heat-insulation layer in addition outside outer tube certainly when ambient temperature is low.

In pipe or the plated film of outer tube can carry out plated film with special mechanical device, also do not have such mechanical device in producing at present, so seem hot fluid transferring pipe simple in structure when making and be not easy.

In need to fix between pipe and the outer tube, many is the less hard material of heat transfer coefficient with insulation material, all can be used as immobilization material between the inner and outer pipes as classes such as the bigger rock wool of density, polyurethane.

Different in the engineering owing to duct length, preferably can field fabrication and one-shot forming.So need in the engineering scene to vacuumize and tube sealing, fixing etc.As assembling, then need expansion joint, expansion joint is the inner and outer pipes expansion joint, the heat losing issue is paid special attention in the coupling part, so that the coupling part is incubated behind the field joint in sealing as far as possible is fixing.Inner and outer pipes is to connect respectively, does not have direct metal to connect between the interior pipe outer tube, between available encapsulant inlay sealing, accomplish that existing dynamics can be incubated again.

Cold fluid transmission because need " cold fluid ' so low-temperature condition avoids heat absorption promptly to reduce ultrared uptake, so the outer tube wall of cold fluid transfer tube is a light-absorption layer when cold fluid transmits, outer tube outer wall is the reflecting layer, outer wall of inner tube is the reflecting layer.

The metal tube material also can be used other as required instead and be stablized, has high-intensity material such as synthetic material fiberglass etc.

Claims

1. hot fluid transferring pipe, it is characterized in that transfer tube is inside and outside two pipe-in-pipe structures, it between two pipes vacuum, and it is fixing between inside and outside two pipes with heat transfer coefficient less insulation material such as polyurethane foam, outer wall of inner tube is coarse plated film of black or coating, outer tube wall is silvery white smooth reflector layer, outer tube outer wall is the black light-absorbing layer, connect between the tube and tube with an expansion joint or a cast molding, if need in producing transmission " cold " liquid as " liquid ammonia " wait only with the reverberation coating of two pipes and absorption light coating mutually co-conversion get final product.

2. according to 1, the expansion joint that connects usefulness is the inner and outer pipes expansion joint, and expansion joint consists of inside and outside two parts and is connected with the inner and outer pipes of fluid transfer pipe respectively.

3. according to 1, the transfer tube material can be various material such as metal, fiberglass.