CN2290749Y - Multi-section compound thermal insulation structure - Google Patents

Abstract

The utility model relates to a multi-section compound thermal insulation structure, which is used for the thermal insulation of the high temperature pipelines or barrel-shaped equipment in departments, such as, chemical industry, metallurgy, electric power, etc. The structure adopts multi-section multilayer compound insulation construction. Fixed rings (5) and (9) are welded on the wall of an insulated pipeline, the pipeline is wound with glass cloth (2), and support rings (4) and (8) are sheathed on the pipeline wound with glass cloth (2). The pipeline is also orderly wrapped with anti-radiation metal-foil (3) and high-efficiency heat insulating felt (12), is wound by glass cloth (7) again, is tied by an iron wire then, and covered by a thin metal sheet as a covering (11) finally. With the structure, the thermal loss of the utility model is decreased by 30% of the thermal loss of the original structure under the same condition, the service life is increased to many times, and the problem that the covering (11) is easy to damage is solved.

Description

The more piece compound insulation structure

A kind of more piece compound insulation structure that relates to is used for the insulation of department's high-temperature pipes such as chemical industry, metallurgy, electric power, equipment, belongs to general engineering thermal insulation.

In chemical industry, metallurgy and other heat enginnerings, in the production as synthetic ammonia in the chemical industry and synthesizing methanol, how reducing heat-energy losses is the important project project.In the chemical industry heat enginnering, traditional method is that the outer wall at the pipeline of hot fluid or equipment wraps one or more layers heat-insulation material, wrap with glass fibre cloth then and tie up with iron wire, or weld mutually with pipeline with iron sheet coating outermost surface and at two ends, the centre then is freely to overlap.There are many problems in this obviously structure, the thermal insulating material thermal conductivity is big, thermal loss increases, the inhomogeneous rounding of the radial thickness of thermal insulation layer, and outward appearance is not beautiful, promptly be to make foreskin with iron sheet, expand because of iron sheet is subjected to temperatures involved, flexible being obstructed causes that easily iron sheet breaks, and thermal insulating material is often dispelled and comes off fragile, heat insulation effect is not good, and working life is short.

In view of this, the purpose of this utility model just be to provide a kind of by multilayer insulant wrap, rational in infrastructure, high insulating effect, the anticorrosive retractable of exoperidium is difficult for the more piece compound insulation structure of drawing crack.

The utility model is by the following technical solutions: on the pipeline or cylindrical device of insulation, the pipe in or the tube in be high temperature fluid, on pipe (or tube) outer wall, every affixed ring of 1.2～1.5 meters welderings, with the affixed ring supporting ring of 50～60 millimeters suits of being separated by.On pipe (or tube) outer wall, be close to winding number layer alkali-free glass wool cloth, its thickness is 0.15～0.20 millimeter, wrap antiradiation metal foil (as alloy foil), effectively insulating felt (super glass wool or alumina silicate fiber felt and so on), glass fibre cloth successively in the glass fibre cloth outside, after outermost glass fibre cloth wraps, use wire tying, make foreskin with stainless steel or aluminium alloy sheet at last, wrap up whole thermal insulation layer, prevent that extraneous corrosion and thermal insulating material are scattered.

Be breaking of preventing that foreskin Yin Gaowen swelling blockage from causing.The utility model is provided with guide sleeve in thermal insulation layer, guide sleeve is a thin walled cylinder, and the one end welds mutually with affixed ring, and the other end is a free end, is supported by supporting ring spot welding.With crust protection, guide sleeve is also made a section between the guide sleeve, does not make mechanical connection between joint and the joint, and leaves spacing, a guide sleeve is set every 1.2～1.5 meters, realizes above-mentioned purpose with this, narrates it below in conjunction with drawings and Examples and knows clearly.

Description of drawings

Fig. 1 is an axial section view of the present utility model.

Referring to Fig. 1, it is the technical characteristics that embodiment tells the more piece compound insulation structure with the pipe insulation, and its structure is made up of following member: tube wall (1), glass fibre cloth (2), antiradiation metal foil (3), supporting ring (4), affixed ring (5), guide sleeve (6), glass fibre cloth (7), supporting ring (8), affixed ring (9), wire (10), exoperidium (11), effectively insulating felt (12).On tube wall (1), writhing number layer alkali-free glass wool cloth (2), and itself and tube wall (1) are close to, its thickness is 0.15～0.2 millimeter, two affixed rings of weldering (5) and (9) on tube wall, it is fixed that the number of affixed ring is come according to duct length, one group of ring of per 1.2～1.5 meters welderings, one be affixed ring another be supporting ring, spacing between ring and the ring is 50～60 millimeters, affixed ring (5) welds mutually with an end of (9) and guide sleeve (6), supporting ring (4) and (8) then are sleeved on pipeline outer wall and are wound with on the pipeline of glass cloth (2), supporting ring (4) and (8) and just spot welding supporting of guiding (6), guide sleeve (6) wall thickness is 3～5 millimeters a cylinder, is placed on the thermal insulation pipe, and the length of cover is slightly than long 5～10 millimeters of two ring distances, an end that links to each other with affixed ring (5) and (9) is a fixed end, and the other end is the free end for sliding vertically then.Affixed ring (5), (9), supporting ring (4), (8) are made by steel wire, and gauge of wire decides according to the insulation layer thickness needs, and its footpath size is generally 6～16 millimeters.

After pipeline outer wall twines glass fibre cloth (2), wrap reflective metals paper tinsel (3) (alloy foil or other metal foils), effectively insulating felt (12) (as super glass wool or alumina silicate fiber felt etc.), glass fibre cloth (7) successively.For preventing that loose the coming off of thermal insulating material from keeping fastening, outside at glass fibre cloth (7) is tied up with wire (10), after tying up, make foreskin (11) with the stainless steel or the aluminium alloy sheet of 0.15 millimeter～1.5 millimeter again, for reducing thermal radiation loss and improving antiseptic property, foreskin (11) is through polishing treatment.

Cause fracture for overcoming exoperidium (11) Yin Gaowen swelling blockage, the exoperidium of this device (11) adopts bushing type, be divided into some joints along pipeline axial, every joint length is 1.2～1.5 meters, one end of exoperidium (11) welds mutually with guiding (6), and the other end is a free end, and leaves 15～25 millimeters gaps between joint and the joint, can do relative displacement between foreskin (11) and the guide sleeve (6), thereby overcome the damage that foreskin (11) is obstructed and causes because of thermal expansion.The utility model is owing to adopt an end complete closed system of exoperidium (11), guide sleeve (6), affixed ring (5) and (9) composition, in thermal insulation layer, form dead gas-bearing formation, gas does not flow and reduces thermal convection losses, owing to use the very little thermal-protective material super glass wool of thermal conductivity, its thermal conductivity is 0.03kcl/m again ².h. ℃, the antiradiation metal foil reduces heat conduction and radiation heat loss, and exoperidium (11) has been done anticorrosion anti-fracture processing again simultaneously.Therefore under equal conditions, when the tube fluid temperature was 300～500 ℃, thermal loss can reduce 30%, and bring up to the several years by present some months the working life of thermal insulating material, has good economic benefits and social benefit.

Claims (4)

1, a kind of more piece compound insulation structure that relates to, be used for chemical industry, metallurgical, department's pipelines such as electric power, the insulation of cylindrical device, it is characterized in that, be a kind of more piece multilayer composite heat insulating structure, it is on the pipeline of insulation or the outer wall of cylindrical device (1), burn-on affixed ring (5) and (9), being close to tube wall writhing number layer thickness is 0.15～0.20 millimeter alkali-free glass wool cloth (2), wrap antiradiation metal foil (3) successively again, effectively insulating felt (12), glass fibre cloth (7) with wire tying glass fibre cloth (7), is made foreskin (12) with the sheetmetal of 0.5～1.5 millimeter at last and is wrapped up whole thermal insulation layer.

2, more piece compound insulation structure according to claim 1, it is characterized in that, on the pipeline or cylinder outer wall of insulation, be welded with affixed ring (5), (9), one end and the affixed boxing of guide sleeve (6) connect, with affixed ring (5) and (9) at a distance of 50～60 millimeters places, be provided with supporting ring (4) and (8), supporting ring (4) and (8) are sleeved on the pipeline that is wound with glass fibre cloth (2).

3, more piece compound insulation structure according to claim 1 is characterized in that, guide sleeve (6) is the cylinder of wall thickness 3～5 millimeters thick, is sleeved on the insulation pipe, and the one end welds mutually and seals with affixed ring (5), and the other end is that free end can slide vertically.

4, more piece compound insulation structure according to claim 1, it is characterized in that, exoperidium (12) is telescopic, its end welds mutually with guide sleeve (6), the other end is a free end, its length of every joint foreskin (11) is 1.2～1.5 meters, leaves 15～25 millimeters gaps between joint and the joint, and foreskin (11) uses the sheet metal after polishing treatment to make.