The vacuum powder heat-insulating cover
Technical field
The utility model relates to a kind of vacuum powder thermal insulation casing, especially for the insulation of heating power conveyance conduit or container.
Background technique
Thermal insulating material is generally adopted in the present most of heating power conveyance conduit or the insulation of container, be wrapped on pipeline or the container as rock wool, glass wool, silica modulus cellucotton etc., these heat insulation effects with inorganic heat insulation material are poor, mainly show: but thermal insulation layer can lose serious by high temperature resistant outer surface heat; The high temperature resistant degree that the outer surface thermal conductivity is little is not enough, in case and enter water then insulation failure.
Chinese patent notification number CN2898541Y has announced a kind of vacuum thermal insulation pipe casing, and the sleeve pipe external form is semi-circular, is evacuated in the sleeve pipe.This sleeve pipe has certain heat insulation effect, avoided using thermal insulation material, but this structure is not considered thermal-radiating loss, and the heat of pipeline or container can distribute by the sealing part of lining to two semi-circular sleeve pipes along internal surface of sleeve pipe, thereby makes heat insulation effect not satisfactory.
The model utility content
The utility model is at the existing disappearance of above-mentioned prior art, and main purpose is to provide a kind of vacuum powder thermal insulation casing of high insulating effect.
For realizing above-mentioned purpose, the utility model is taked following technological scheme:
A kind of vacuum powder heat-insulating cover comprises two semi-circular sleeve pipes, is provided with a vacuum chamber in the middle of each semi-circular sleeve pipe, is filled with the powder of high temperature resistant and anti-heat radiation in this vacuum chamber.
The inwall of described each semi-circular sleeve pipe is provided with the reflecting layer.
The end of described semi-circular sleeve pipe is provided with insulation glue.
The outer wall of described semi-circular sleeve pipe is provided with the mouth of bleeding.
The outer wall of described two semi-circular sleeve pipes is arranged with and is connected and fixed device.
The utility model advantage is as follows:
1, powder by anti-heat radiation in the vacuum chamber in the middle of the semi-circular sleeve pipe reaches insulation effect, because vacuum chamber can make that the conductive force of residual gas weakens greatly in the space, has very big thermal contact resistance between powder particle simultaneously, make the solid phase conductive force also very weak, especially powder can play shielding action again to radiation, and powder also can balanced ambient pressure, do not need thicker shell material, so heat-insulating property of the present utility model, structural behaviour compared to existing technology in simple vacuum sandwich to get well, so can make high insulating effect, quality of product gets a promotion, and helps marketing.
2, the heat that gives off of heat distribution pipeline that utilizes the set reflecting layer of semi-circular internal surface of sleeve pipe to stop to be coated or container makes heat insulation effect better.
3, simple in structure, be easy to realize, and long service life, pollution-free.
Description of drawings
Fig. 1 is the partial sectional view of the utility model plan view;
Fig. 2 is the utility model schematic cross-section.
The drawing reference numeral explanation:
1, sleeve pipe 11, vacuum chamber
12, bleed mouth 2, powder
3, reflecting layer 4, insulation glue
5, be connected and fixed device
Embodiment
Below in conjunction with accompanying drawing and embodiment the utility model is further described.
See also Fig. 1, shown in Figure 2; a kind of vacuum powder heat-insulating cover comprises two semi-circular sleeve pipes 1, is provided with a vacuum chamber 11 in the middle of each semi-circular sleeve pipe 1; be filled with the powder 2 of high temperature resistant and anti-heat radiation in this vacuum chamber 11, this powder 2 can be materials such as ceramic particle or alumina silicate particle.Can play shielding action to thermal radiation by this powder 2, owing to have very big thermal contact resistance, make the solid phase conductive force also very weak between its particle, and can balanced ambient pressure.The outer wall of described semi-circular sleeve pipe 1 is provided with the mouth 12 of bleeding, to vacuumize in the 12 pairs of vacuum chambers 11 of mouth of bleeding by this.
Further, be provided with reflecting layer 3 at the inwall of each semi-circular sleeve pipe 1, this reflecting layer 3 can stop the heat that heat distribution pipeline or container give off effectively, makes heat insulation effect better.
Further, be provided with insulation glue 4 in the end of each semi-circular sleeve pipe 1, this insulation glue 4 has resistance and high temperature resistance property, and can avoid the thermal loss of sealing part.
Further, be arranged with at the outer wall of two semi-circular sleeve pipes 1 and be connected and fixed device 5, it utilizes bolt also can be made into clip and fixes, and this is connected and fixed device 5 numbers and decides with pipeline or container length.
The utility model preparation process is to be full of resistant to elevated temperatures powder 2 in semi-circular sleeve pipe 1, by mouth 12 places of bleeding vacuum chamber 11 in the semi-circular sleeve pipe 1 is vacuumized afterwards, seals the mouth 12 of bleeding after finishing immediately; Inwall at sleeve pipe 1 is coated with reflecting layer 3 then, in each joint of two semi-circular sleeve pipes 1 resistant to elevated temperatures insulation glue 4 is housed all after being coated with, to avoid the thermal loss of sealing part.
During use, two semi-circular sleeve pipe 1 symmetries are wrapped on heat distribution pipeline or the container, wherein, powder by anti-heat radiation in the vacuum chamber reaches insulation effect, because vacuum chamber can make that the conductive force of residual gas weakens greatly in the space, has very big thermal contact resistance between powder particle simultaneously, make the solid phase conductive force also very weak, especially powder can play shielding action again to radiation, and powder also can balanced ambient pressure, do not need thicker shell material, so heat-insulating property of the present utility model, structural behaviour compared to existing technology in simple vacuum sandwich to get well, so can make high insulating effect, quality of product gets a promotion, and helps marketing.And the heat that gives off of the heat distribution pipeline that further utilizes the set reflecting layer of semi-circular internal surface of sleeve pipe to stop to be coated or container, make heat insulation effect better.
The above, it only is the preferred embodiment of the utility model structure, be not that technical scope of the present utility model is imposed any restrictions, so every foundation technical spirit of the present utility model all still belongs in the scope of technical solutions of the utility model any trickle modification, equivalent variations and modification that above embodiment did.