CN205244716U

CN205244716U - Heat -resisting type non -metallic expansion joint

Info

Publication number: CN205244716U
Application number: CN201521005099.0U
Authority: CN
Inventors: 鲍志刚; 鲍亚婷
Original assignee: ZHUJI LANTIAN NON-METAL TECHNICS INSTITUTE
Current assignee: ZHUJI LANTIAN NON-METAL TECHNICS INSTITUTE
Priority date: 2015-12-07
Filing date: 2015-12-07
Publication date: 2016-05-18
Anticipated expiration: 2025-12-07

Abstract

The utility model discloses a heat -resisting type non -metallic expansion joint, connecting pipe including being used for the connecting tube has set firmly the covering on the lateral wall of connecting pipe, be provided with the bush on the inside wall, dead zone in forming between covering and bush, be provided with the heat insulation layer on the covering, the heat insulation layer includes that it gets rid of silk rug layer, varnished cloth layer and belted steel net silicon cloth plaster layer to follow interior aluminium silicate toward setting gradually outward, and outer packing of heat insulation layer has aluminium silicate thermal insulation material. Through the heat insulation layer that sets up multiple material in the covering, can reduce the heat radiation between the same material, also can there be certain air gap between these materials moreover, because the hot conduction efficiency between the air is low, utilize this characteristic of air, further reduce the inside outside heat radiation of expansion joint.

Description

A kind of heat resistant type non-metal expansion joint

Technical field

The utility model relates to expansion joint technical field, is specifically related to a kind of heat resistant type non-metal expansion joint.

Background technology

Expansion joint is also compensator traditionally, or telescopic joint. By forming the bellows (a kind of flexible member) of its operative body and holding the annexes such as pipe, support, flange, conduit to form. Expansion joint is the additional stress causing because of temperature difference and mechanical oscillation in order to compensate, and is arranged on a kind of flexible structure on container casing or pipeline. Utilize effective dilatation of its operative body bellows, to absorb pipeline, conduit, container etc. by the change in size former thereby that produce such as expand with heat and contract with cold, or compensation pipes, conduit, container etc. axially, laterally and angular displacement. Also can be used in noise-and-vibration-reduction, heat supply, for prevent heat supply pipeline heat up time, because thermal stretching or temperature stress cause pipe deforming or destruction, compensator need to be set on pipeline, with the thermal stretching of compensation pipeline, thereby reduce the stress of tube wall and act on the active force on valve member or supporting structure. Because expansion joint is as a kind of elastic compensating element that can free-extension, there is the advantages such as reliable operation, functional, compact conformation, be widely used in the departments such as chemical industry, metallurgy, nuclear energy.

Application number is the Chinese patent of CN201410118332.X, discloses a kind of non-metal expansion joint for boiler smoke duct, comprises covering, thermal insulating filling, pressing plate, frame and baffle plate; Described covering and frame, baffle plate are connected to form hollow structure by pressing plate, and thermal insulating filling is packed in hollow structure; One end of described baffle plate is welded in to be taken over above, and one end is free end in addition, and the gap of baffle plate and adapter is 8mm; Described covering is that stainless steel wire strengthens ceramic fiber cloth; Described thermal insulating filling is alumina silicate heat-barrier material.

The weak point of this patent is, even heat-barrier material, but between same material, can there is certain heat radiation and in this patent, adopt individual layer alumina silicate heat-barrier material that the heat radiation between alumina silicate and alumina silicate can smooth and easyly must be conducted, and temperature in boiler smoke duct is conventionally higher, make heat radiation between alumina silicate in the time being transmitted to outermost covering, still there is higher temperature, affect the heat resistance of this non-metal expansion joint.

Utility model content

The deficiency existing for prior art, the purpose of this utility model is to provide a kind of thermal-radiating heat resistant type non-metal expansion joint in expansion joint that reduces.

For achieving the above object, the utility model provides following technical scheme:

A kind of heat resistant type non-metal expansion joint, comprise the tube connector for connecting pipe, on the lateral wall of tube connector, be installed with covering, on madial wall, be provided with lining, between covering and lining, form hollow area, on described covering, be provided with heat insulation layer, heat insulation layer comprises from the interior alumina silicate setting gradually outward and gets rid of silk rug layer, varnished cloth layer and band steel mesh silica gel layer of cloth, is filled with alumina silicate heat-barrier material in hollow area.

Of the present utility modelly further be set to: described covering and tube connector are bolted, and the closure of bolt is identical with pipeline bearing of trend.

Of the present utility modelly further be set to: described lining comprises two-layer and relatively shifts to install, and extends along fluid flow direction near one deck of pipeline fluid.

The utlity model has following advantage: by the heat insulation layer of multiple material is set in covering, can reduce the heat radiation between same material, and between these materials, also can there is certain the air gap, because the heat conduction efficiency between air is low, utilize this characteristic of air, further reduce the inner outside heat radiation of expansion joint. This arranges the heat resistance that has improved expansion joint entirety, has effectively improved the stability of expansion joint under hot environment.

Brief description of the drawings

Fig. 1 is the schematic diagram of heat resistant type non-metal expansion joint;

Fig. 2 is the enlarged drawing at A place in Fig. 1.

Reference numeral: 1, tube connector; 2, pipeline; 3, covering; 4, lining; 5, hollow area; 6, heat insulation layer; 61, alumina silicate gets rid of silk rug layer; 62, varnished cloth layer; 63, band steel mesh silica gel layer of cloth; 7, alumina silicate heat-barrier material.

Detailed description of the invention

See figures.1.and.2 the utility model is described further.

As depicted in figs. 1 and 2, wherein arrow direction is the mobile direction of fluid. A kind of heat resistant type non-metal expansion joint, comprise the tube connector 1 for connecting pipe 2, on the lateral wall of tube connector 1, be installed with covering 3, on madial wall, be provided with lining 4, between covering 3 and lining 4, form hollow area 5, on described covering 3, be provided with heat insulation layer 6, heat insulation layer 6 comprises from the interior alumina silicate setting gradually outward and gets rid of silk rug layer 61, varnished cloth layer 62 and band steel mesh silica gel layer of cloth 63, is filled with alumina silicate heat-barrier material 7 in hollow area 5. By at the interior heat insulation layer 6 that multiple material is set of covering 3, can reduce the heat radiation between same material, and between these materials, also can there is certain the air gap, because the heat conduction efficiency between air is low, utilize this characteristic of air, also can further reduce the inner outside heat radiation of expansion joint. This arranges the heat resistance that has improved expansion joint entirety, has effectively improved the stability of expansion joint under hot environment. Wherein, the alumina silicate in heat insulation layer 6 get rid of silk rug by flint clay through more than 2000 DEG C furnace melting, jet into fiber, simultaneously evenly add special binding agent, oil-proofing agent, hydrophober forms through being heating and curing. The multiple advantages such as have stable performance, tensile strength is large, and thermal conductivity factor is low, heat-proof quality good, and anti-rapid heat cycle performance is good. And varnished cloth is in order to protect alumina silicate to get rid of silk rug; outermost band steel mesh silica gel cloth is made up of the heat cure of silica gel process high temperature; have higher high temperature resistant; anti-corrosive properties; ageing resistace, elasticity and flexible good, as the device that flexibly connects of pipeline 2; for example, as the base material of expansion joint, it can solve the destruction of expanding with heat and contract with cold to pipeline 2. Covering 3 is the band steel mesh fine cloth of making pottery, have high temperature resistant, thermal conductivity factor is low, the feature of anti-thermal shock, low heat capacity.

Described covering 3 is bolted with tube connector 1, and the closure of bolt is identical with pipeline 2 bearing of trends. This setting can be in the time that covering 3 expands due to the effect of junction inner ring, covering 3 is blocked, and the connected mode vertical with pipeline 2 bearing of trends with respect to conventional bolt, can reduce covering 3 and expand time, gap between covering 3 and bolt, thus the sealing of this non-metal expansion joint increased.

Described lining 4 comprises two-layer and relatively shifts to install, and extends along fluid flow direction near one deck of pipeline 2 fluids. This lining 4 is arranged on the inside of tube connector 1, enters expansion joint inside in order to the fluid that reduces 2, pipeline. And because fluid flow direction is very fast, one deck near pipeline 2 fluids extends and can make major part flow through the lining 4 at this place along fluid flow direction, small part fluid enters between two-layered liner 4, stop via one deck lining 4 away from fluid again, finally just enter hollow area 5, the impulse force of rapid flow of fluid can be slowed down, thereby reduce the impact of fluid to expansion joint various piece, strengthen the stability of expansion joint.

The above is only preferred embodiment of the present utility model, and protection domain of the present utility model is also not only confined to above-described embodiment, and all technical schemes belonging under the utility model thinking all belong to protection domain of the present utility model. It should be pointed out that for those skilled in the art, in the some improvements and modifications that do not depart under the utility model principle prerequisite, these improvements and modifications also should be considered as protection domain of the present utility model.

Claims

1. a heat resistant type non-metal expansion joint, comprise the tube connector for connecting pipe, on the lateral wall of tube connector, be installed with covering, on madial wall, be provided with lining, between covering and lining, form hollow area, it is characterized in that: on described covering, be provided with heat insulation layer, heat insulation layer comprises from the interior alumina silicate setting gradually outward and gets rid of silk rug layer, varnished cloth layer and band steel mesh silica gel layer of cloth, is filled with alumina silicate heat-barrier material in hollow area.

2. a kind of heat resistant type non-metal expansion joint according to claim 1, is characterized in that: described covering and tube connector are bolted, and the closure of bolt is identical with pipeline bearing of trend.

3. a kind of heat resistant type non-metal expansion joint according to claim 1, is characterized in that: described lining comprises two-layer and relatively shifts to install, and extends along fluid flow direction near one deck of pipeline fluid.