CN115846431A - Vacuum heat preservation box device and manufacturing method thereof - Google Patents
Vacuum heat preservation box device and manufacturing method thereof Download PDFInfo
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- CN115846431A CN115846431A CN202211560581.5A CN202211560581A CN115846431A CN 115846431 A CN115846431 A CN 115846431A CN 202211560581 A CN202211560581 A CN 202211560581A CN 115846431 A CN115846431 A CN 115846431A
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Abstract
The invention provides a vacuum heat preservation box device and a manufacturing method thereof, wherein the vacuum heat preservation box device comprises: the heat preservation box comprises a heat preservation box shell and a heat preservation structure; the heat preservation box shell comprises a heat preservation shell with a downward opening and a heat preservation box end cover arranged at the opening of the heat preservation shell; the top of the heat preservation box shell is detachably arranged at the position of the heat preservation cover to be arranged; the heat preservation structure comprises an upper heat preservation material layer arranged on the top end of the interior of the heat preservation shell, a lower heat preservation material layer arranged on the top of the end cover of the heat preservation box, and an absolute vacuum layer arranged between the upper heat preservation material layer and the lower heat preservation material layer. The invention can solve the problems that the heat-insulating material is easy to corrode and fall off, the heat-insulating box is fixedly installed, the disassembly and the replacement are not facilitated, the heat-insulating effect is not ideal and the like in the prior art.
Description
Technical Field
The invention relates to the technical field of hot rolling equipment, in particular to a vacuum heat preservation box device and a manufacturing method thereof.
Background
In a hot rolling production line, the heat-insulating cover is an indispensable device in the rolling process and is used for preventing the temperature drop of a plate blank rolled by a roughing mill from being too large in the process of conveying the plate blank to a finishing mill so as to influence the normal process control. In consideration of the heat preservation effect, the heat preservation cover forms a closed space around the slab at the position as low as possible so as to achieve good heat preservation performance.
According to on-site investigation, after the hot-rolled heat-insulating cover is put into use, the temperature of the head of the intermediate billet entering a finishing mill is increased by about 25 ℃, the temperature of the tail of the intermediate billet entering the finishing mill is increased by about 5 ℃, and the temperature of the tail of the intermediate billet also has an increasing space. The temperature of the intermediate billet in the finish rolling area is increased, so that the finish rolling force is reduced, but the problems of expansion of head-tail temperature difference, increase of scale defects and the like also occur. The heat preservation cover in the prior art is generally in a heat preservation cotton overlapping mode, and the heat preservation cotton is fixed on the anchoring nail at the top or the side of the shell of the heat preservation cover, so that the heat preservation cover has the defect of easy aging, falling off and overburning. The cotton installation of heat preservation of anchor nail all has the drawback naked and that drop easily with the cotton blocking of heat preservation, adopts the heat preservation cotton of "Y" type nail fixed, and naked directness and billet environment contact cause corruption, ageing and vibrations in process of production and drop. Thereby causing foreign matters on the surface of the strip steel to be pressed in, causing scrap steel, seriously affecting the normal use of the heat preservation effect and the whole function of the heat preservation cover, and even causing batch quality accidents.
In order to solve the problems, the technical means that the heat preservation boxes are arranged in the heat preservation cover is adopted in the prior art, namely the heat preservation cover is formed by arranging a plurality of heat preservation boxes, the conventional heat preservation boxes are closed box bodies filled with heat preservation materials, and are not of closed heat preservation box structures, because the conventional heat preservation boxes are subjected to high-temperature radiation of an intermediate blank and a large amount of steam which is flushed from a slag flushing ditch below a roller way for a long time and in a short distance, a stainless steel panel of the upper heat preservation box in the conventional design is corroded by a fixing bolt and falls off due to thermal deformation of the panel, the internal heat preservation materials immediately fall off, the heat preservation boxes do not have a heat preservation function any more, spare parts are required to be replaced, and the use cost of the heat preservation boxes is greatly increased; meanwhile, the fallen stainless steel panel is adhered to the surface of the intermediate billet and brought into the descaler before finish rolling, so that the failure of a collector pipe of the descaler can be caused, even the stainless steel panel is brought into the finish rolling machine to cause steel piling leakage, and the normal production rhythm is seriously influenced. For example, the patent application No. 201520619992.6 discloses a hot-rolled heat-insulating cover heat-insulating box, which is a non-cover box body, and a plurality of heat-insulating blocks are in close contact with each other; a u-shaped plate is assembled in each heat preservation block, and a u-shaped plate bottom plate is fixedly connected with a heat preservation box body bottom plate. The heat preservation box does not completely lock the heat preservation cotton inside the heat preservation box, only fixes the heat preservation material in the exposed shell through a U-shaped plate, a fixed rod or a bolt, has no obvious technical difference with the common heat preservation cotton installation form of the heat preservation cover, and can cause local corrosion, aging, falling off and other phenomena in the actual use process. The factors considered in the prior art are that a panel of a box cover of the heat preservation box is removed, and a heat preservation block directly receives baking of a hot intermediate blank, so that accidents caused by falling-off of the panel can be avoided; meanwhile, because the fixing bolt is positioned in the heat insulation block, the bolt cannot be corroded; the mode that closely compression insulation block and u template and heat preservation box bottom plate are fixed together can guarantee that the insulation block working process can not take place to drop, and the fixed connection intensity of insulation block has further been strengthened in the setting of dead lever.
However, the fixing form of the heat insulation cotton in the heat insulation box is that the anchoring nail is directly fixed or the heat insulation box (block) is exposed, the fixing mode of the heat insulation cotton is not firm, the heat insulation material is easily damaged by pulling and falls off seriously in the using process of the heat insulation cotton in the process of head raising and tail swinging of the strip steel, and the foreign matter on the surface of the strip steel is easily pressed in due to overburning of the inner lining plate, so that the steel scrap accident is caused in the hot rolling process; the water vapor in the hot rolling field is heavy, the heat insulation cotton is seriously corroded and lost in a naked state, and the replacement life cycle of spare parts is short; if the heat preservation cotton falls off and the heat preservation cover support deforms to cause that the heat preservation cover is not put into the heat preservation cover, the temperature of the strip steel is seriously reduced, and the temperature reduction energy consumption is increased; production data shows that the structure of the heat preservation box in the prior art is not ideal in heat preservation effect, normal use of the overall function of the heat preservation cover is affected, and batch quality accidents are caused.
In conclusion, the heat preservation box designed by the prior art mainly has the problems that the heat preservation material is easy to corrode and fall off, the heat preservation box is fixedly installed, the disassembly and the replacement are not facilitated, the heat preservation effect is not ideal and the like due to the defect of the structural design.
Disclosure of Invention
In view of the above problems, an object of the present invention is to provide a vacuum insulation box device and a method for manufacturing the same, so as to solve the problems in the prior art that the insulation material is easy to corrode and fall off, the insulation box is fixedly installed, the disassembly and replacement are not easy, the insulation effect is not ideal, and the like.
The invention provides a vacuum heat preservation box device, comprising: the heat preservation box comprises a heat preservation box shell and a heat preservation structure; the heat preservation box shell comprises a heat preservation shell with a downward opening and a heat preservation box end cover arranged at the opening of the heat preservation shell; the top of the heat preservation box shell is detachably arranged at the position of the heat preservation cover to be arranged; the heat preservation structure is in including setting up the last insulation material layer on the inside top of insulation housing, setting are in the lower insulation material layer and the setting at insulation box end cover top are in go up the insulation material layer with the absolute vacuum layer between the insulation material layer down.
In addition, the preferable scheme is that the upper heat-insulating material layer is fixed at the top end of the interior of the heat-insulating shell through an anchoring nail; and a locking nut is arranged at the bottom end of the anchoring nail.
In addition, preferably, a gasket is arranged on the anchor nail and between the locking nut and the bottom end of the upper heat-insulating material layer.
In addition, the thickness of the upper heat-insulating material layer is preferably 30mm +/-10 mm; the thickness of the lower heat-insulating material layer is 30mm +/-10 mm; the thickness of the absolute vacuum layer is 20mm-60mm.
In addition, preferably, the upper heat insulating material layer is a ceramic fiber layer.
In addition, preferably, the lower thermal insulation material layer is a mesoporous material layer.
In addition, preferably, the heat preservation shell is a stainless steel shell.
In addition, the end cover of the heat preservation box preferably comprises a cover plate and a fixed connecting plate arranged around the periphery of the top of the cover plate; the fixed connecting plate is fixed on the outer side wall of the opening of the heat-insulating shell through a fixing piece.
Preferably, the cover plate is a stainless steel heat-resistant plate.
The invention provides a manufacturing method of the vacuum heat preservation box device, which comprises the following steps:
manufacturing a heat insulation shell with a downward opening, and fixing an upper heat insulation material layer with a preset thickness at the top end inside the heat insulation shell to obtain a first heat insulation shell;
manufacturing an insulation box end cover matched with the lower opening of the first insulation shell, and fixing an insulation material layer at the top end of the insulation box end cover to obtain a first insulation box end cover;
fixedly mounting the first heat preservation box end cover at an opening of the first heat preservation shell, and performing vacuum treatment on a space between the upper heat preservation material layer and the lower heat preservation material layer to form an absolute vacuum layer in the space, so as to obtain a vacuum heat preservation box device;
and installing the top end of the vacuum heat-preservation box device on the position to be installed of the heat-preservation cover through a detachable structure.
According to the technical scheme, the vacuum insulation box device and the manufacturing method thereof provided by the invention have the advantages that the absolute vacuum layer is arranged between the lower insulation material layer and the upper insulation material layer, so that the interior of the insulation box is vacuumized, air flow is prevented, the insulation material is prevented from being corroded by air, and the service life of the insulation box is prolonged; the upper heat-insulating material layer is arranged at the top end in the heat-insulating shell, the lower heat-insulating material layer is arranged at the top of the heat-insulating box end cover and is not easy to fall off, the upper heat-insulating material layer and the lower heat-insulating material layer are divided into an upper layer and a lower layer, an absolute vacuum layer is formed in the middle of the upper heat-insulating material layer and the lower heat-insulating material layer, the connection technology between the heat-insulating box end cover and the heat-insulating shell is mature, and material accumulation and heat-insulating material water vapor condensation are not easy to form in the heat-insulating box shell to cause internal corrosion; the top of the shell of the heat preservation box is detachably arranged at the position to be installed of the heat preservation cover, and each heat preservation box can be independently disassembled and assembled, so that the time is saved, and the disassembly and the assembly are convenient; the vacuum heat-insulating box device provided by the invention is arranged on the inner wall of the heat-insulating cover, is not in direct contact with the steel billet of the roller way, separates the high-temperature steel billet by the heat-insulating box, has heat-resistant protection effect on the inner wall of the heat-insulating cover, can not directly transmit heat radiation to a main stress steel frame of the heat-insulating cover, and can paint high-temperature-resistant silver powder paint on the outer surfaces of the heat-insulating cover body and the heat-insulating box (except stainless steel), so that the heat-insulating cover frame body is not influenced by heat radiation and is deformed and distorted; and the heat preservation effect is good.
To the accomplishment of the foregoing and related ends, one or more aspects of the invention comprise the features hereinafter fully described. The following description and the annexed drawings set forth in detail certain illustrative aspects of the invention. These aspects are indicative, however, of but a few of the various ways in which the principles of the invention may be employed. Further, the present invention is intended to include all such aspects and their equivalents.
Drawings
Other objects and results of the present invention will become more apparent and more readily appreciated as the same becomes better understood by reference to the following description taken in conjunction with the accompanying drawings. In the drawings:
FIG. 1 is a schematic front view of a vacuum insulation box device according to an embodiment of the present invention;
FIG. 2 isbase:Sub>A schematic cross-sectional view taken along the line A-A of FIG. 1;
FIG. 3 is a schematic top view of a vacuum insulation box apparatus according to an embodiment of the present invention;
FIG. 4 is a flow chart of a method for manufacturing a vacuum insulation box device according to an embodiment of the invention.
In the attached figure, 11-an insulation shell, 111-a mounting seat, 1111-a mounting hole, 12-an insulation box end cover, 121-a cover plate, 122-a fixed connecting plate, 21-an upper insulation material layer, 22-a lower insulation material layer, 23-an absolute-dense vacuum layer, 31-an anchor nail, 32-a locking nut, 41-a stainless steel nail and 42-a nut.
The same reference numbers in all figures indicate similar or corresponding features or functions.
Detailed Description
In the following description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of one or more embodiments. It may be evident, however, that such embodiment(s) may be practiced without these specific details.
Aiming at the problems that the heat-insulating material is easy to corrode and fall off, the heat-insulating box is fixedly installed, the disassembly and the replacement are not facilitated, the heat-insulating effect is not ideal and the like in the prior art, the vacuum heat-insulating box device and the manufacturing method thereof are provided.
Specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
In order to explain the vacuum insulation box device and the manufacturing method thereof provided by the invention, fig. 1 shows a front view structure of the vacuum insulation box device according to the embodiment of the invention; FIG. 2 showsbase:Sub>A cross-sectional structure in the direction A-A of FIG. 1; FIG. 3 shows a top view of a vacuum insulation box arrangement according to an embodiment of the present invention; FIG. 4 shows a flow of a method for manufacturing a vacuum insulation box device according to an embodiment of the invention.
As shown in fig. 1 to 4, the vacuum insulation box device provided by the present invention comprises: the heat preservation box comprises a heat preservation box shell and a heat preservation structure; the heat preservation box shell comprises a heat preservation shell 11 with a downward opening and a heat preservation box end cover 12 arranged at the opening of the heat preservation shell 11; the top of the heat preservation box shell 11 is detachably arranged at the position of the heat preservation cover to be arranged; the heat preservation structure includes the last insulation material layer 21 that sets up the top in the inside of heat preservation shell 11, sets up the lower insulation material layer 22 at heat preservation box end cover 12 top and sets up the airtight vacuum layer 23 between last insulation material layer 21 and lower insulation material layer 22.
The vacuum is formed in the heat preservation box through the absolute vacuum layer 23 arranged between the lower heat preservation material layer 22 and the upper heat preservation material layer 21, so that air flow is prevented, the heat preservation material is prevented from being corroded by air, and the service life of the heat preservation box is prolonged; the upper heat-insulating material layer 21 is arranged at the top end inside the heat-insulating shell 11, the lower heat-insulating material layer 22 is arranged at the top of the heat-insulating box end cover 12 and is not easy to fall off, the upper heat-insulating layer and the lower heat-insulating layer are divided into an upper heat-insulating layer and a lower heat-insulating layer, a sealed vacuum layer 23 is formed in the middle of the upper heat-insulating layer and the lower heat-insulating layer, the connection technology between the heat-insulating box end cover 12 and the heat-insulating shell 11 is mature, and the internal corrosion caused by material accumulation and heat-insulating material water vapor condensation in the heat-insulating box shell is not easy to form; the top of the shell of the heat preservation box is detachably arranged at the position to be installed of the heat preservation cover, and each heat preservation box can be independently disassembled and assembled, so that the time is saved, and the disassembly and the assembly are convenient; the vacuum heat-insulating box device provided by the invention is arranged on the inner wall of the heat-insulating cover, is not in direct contact with the steel billet of the roller way, separates the high-temperature steel billet by the heat-insulating box, has heat-resistant protection effect on the inner wall of the heat-insulating cover, can not directly transmit heat radiation to a main stress steel frame of the heat-insulating cover, and can paint high-temperature-resistant silver powder paint on the outer surfaces of the heat-insulating cover body and the heat-insulating box (except stainless steel), so that the heat-insulating cover frame body is not influenced by heat radiation and is deformed and distorted; and the heat preservation effect is good.
Wherein, the demountable installation mode of the top demountable installation of heat preservation box casing body in treating mounted position department of heat preservation cover can adopt modes such as setting up link, bolt to realize, for example, is provided with mount pad 111 at the top of heat preservation shell 11, is provided with mounting hole 1111 on mount pad 111, is provided with the installation bolt in mounting hole 1111, and heat preservation box casing body passes through installation bolt demountable installation on the support of treating mounted position of heat preservation cover. In order to make the installation of the thermal insulation box device more stable, a plurality of installation seats 111 may be provided, and as shown in fig. 3, four sets of installation seats 111 are uniformly provided on the top of the thermal insulation housing 11.
As a preferred embodiment of the present invention, the upper thermal insulation material layer 21 is fixed at the top end of the inside of the thermal insulation case 11 by the anchor nails 31; a lock nut 32 is provided at the bottom end of the anchor nail 31. The upper heat-insulating material layer 21 is firmly fixed and is not easy to fall off by combining the anchoring nails 31 with the locking nuts 32. Wherein the number of the anchoring nails 31 can be determined according to actual conditions.
As a preferred embodiment of the present invention, a spacer is provided on the anchor nail 31 between the lock nut 32 and the bottom end of the upper thermal insulation material layer 21. The bottom end of the upper heat-insulating material layer 21 is protected by the gasket, and the fixing is firmer.
As a preferred embodiment of the invention, the thickness of the upper heat-insulating material layer 21 is 30mm +/-10 mm; the thickness of the lower heat-insulating material layer 22 is 30mm +/-10 mm; the thickness of the absolute vacuum layer 23 is 20mm-60mm. The vertical height of the inner space of the shell of the heat preservation box is preferably 100mm, and the thickness of the upper heat preservation material layer 21 and the thickness of the lower heat preservation material layer 22 are both preferably 25mm; the thickness of the absolute vacuum layer 23 is preferably 50mm, so that the internal structural space arrangement of the shell of the heat preservation box is more reasonable.
In a preferred embodiment of the present invention, the upper thermal insulation material layer 21 is a ceramic fiber layer. The ceramic fiber blanket is made of ceramic fiber materials, is relatively low in price, is combined with structures such as a dense vacuum layer 23 and a lower heat insulation material layer 22 in the shell of the heat insulation box, and is good in heat insulation effect.
As a preferred embodiment of the present invention, the lower thermal insulation material layer 22 is a mesoporous material layer. The mesoporous material is a porous solid with the pore diameter of 2-50 nanometers, is an important branch of the nano material, is used for the lower heat insulation material layer 22 in a composite mode, and has better thermal stability. For example, mesoporous insulation blankets, nanocomposite insulation and heat retention materials made from silica materials and inorganic fibers. Can better play the role of heat insulation.
In a preferred embodiment of the present invention, the thermal insulation casing 11 is a stainless steel casing. Is durable.
As a preferred embodiment of the present invention, the insulating case end cap 12 includes a cap plate 121 and a fixing connection plate 122 disposed around the periphery of the top of the cap plate 121; the fixed connection plate 122 is fixed on the outer side wall of the opening of the thermal insulation shell 11 through a fixing piece. The fixing piece comprises a stainless steel nail 41 and a nut 42 arranged at the end part of the stainless steel nail 41; the end of the stainless steel nail 41 passes through the fixed connection plate 122 and the outer side wall of the thermal insulation shell 11, and is arranged inside the thermal insulation shell 11. The heat preservation shell is closed, the heat preservation shell 11 and the heat preservation box end cover 12 are fixed more tightly through the structural design, the number of the fixing pieces is multiple, and the specific number is determined according to actual conditions.
As a preferred embodiment of the present invention, the cover plate 121 is a stainless steel heat-resistant plate. The stainless steel heat-resistant plate is a stainless steel plate obtained by performing high-temperature tempering treatment before assembly and welding, can reflect and shield heat radiation, can increase the internal thermal efficiency of the shell of the heat preservation box compared with the prior art, and has high heat preservation effect.
The invention provides a manufacturing method of the vacuum heat preservation box device, which comprises the following steps:
s1, manufacturing a heat preservation shell 11 with a downward opening, and fixing an upper heat preservation material layer 21 with a preset thickness at the top end inside the heat preservation shell 11 to obtain a first heat preservation shell;
s2, manufacturing a heat preservation box end cover 12 matched with the lower opening of the first heat preservation shell 11, and fixing a lower heat preservation material layer 22 at the top end of the heat preservation box end cover 12 to obtain a first heat preservation box end cover;
s3, fixedly installing a first heat preservation box end cover at an opening of the first heat preservation shell, and performing vacuum treatment on the space between the upper heat preservation material layer 21 and the lower heat preservation material layer 22 to form an absolute vacuum layer 23 in the space, so as to obtain a vacuum heat preservation box device;
and S4, mounting the top end of the vacuum heat-preservation box device on a position to be mounted of the heat-preservation cover through a detachable structure.
According to the vacuum insulation box device and the manufacturing method thereof, the absolute vacuum layer is arranged between the lower insulation material layer and the upper insulation material layer, so that vacuum is formed inside the insulation box, air is prevented from flowing, the insulation material is prevented from being corroded by air, and the service life of the insulation box is prolonged; the upper heat-insulating material layer is arranged at the top end in the heat-insulating shell, the lower heat-insulating material layer is arranged at the top of the heat-insulating box end cover, is not easy to fall off and is divided into an upper layer and a lower layer, a very tight vacuum layer is formed in the middle of the upper heat-insulating material layer and the lower heat-insulating material layer, the connection technology between the heat-insulating box end cover and the heat-insulating shell is mature, and the internal corrosion caused by material accumulation and heat-insulating material water vapor condensation in the heat-insulating box shell is not easy to form; the top of the shell of the heat preservation box is detachably arranged at the position to be installed of the heat preservation cover, and each heat preservation box can be independently disassembled and assembled, so that the time is saved, and the disassembly and the assembly are convenient; the vacuum heat-insulating box device provided by the invention is arranged on the inner wall of the heat-insulating cover, is not in direct contact with the steel billet of the roller way, separates the high-temperature steel billet by the heat-insulating box, has heat-resistant protection effect on the inner wall of the heat-insulating cover, can not directly transmit heat radiation to a main stress steel frame of the heat-insulating cover, and can paint high-temperature-resistant silver powder paint on the outer surfaces of the heat-insulating cover body and the heat-insulating box (except stainless steel), so that the heat-insulating cover frame body is not influenced by heat radiation and is deformed and distorted; and the heat preservation effect is good.
The vacuum insulation box arrangement and the method for manufacturing the same according to the present invention have been described above by way of example with reference to the accompanying drawings. However, it will be appreciated by those skilled in the art that various modifications may be made to the vacuum insulation box apparatus and the method of making the same in accordance with the present invention without departing from the spirit of the invention. Therefore, the scope of the present invention should be determined by the contents of the appended claims.
Claims (10)
1. A vacuum heat preservation box device comprises a heat preservation box shell and a heat preservation structure; it is characterized in that the preparation method is characterized in that,
the heat preservation box shell comprises a heat preservation shell with a downward opening and a heat preservation box end cover arranged at the opening of the heat preservation shell; the top of the heat preservation box shell is detachably arranged at the position of the heat preservation cover to be arranged;
the heat preservation structure is in including setting up the last insulation material layer on the inside top of insulation housing, setting are in the lower insulation material layer and the setting at insulation box end cover top are in go up the insulation material layer with the absolute vacuum layer between the insulation material layer down.
2. The vacuum insulation box device according to claim 1,
the upper heat-insulating material layer is fixed at the top end of the interior of the heat-insulating shell through an anchoring nail;
and a locking nut is arranged at the bottom end of the anchoring nail.
3. The vacuum insulation box device according to claim 2,
and a gasket is arranged on the anchoring nail and between the locking nut and the bottom end of the upper heat-insulating material layer.
4. The vacuum insulation box device according to claim 1,
the thickness of the upper heat-insulating material layer is 30mm +/-10 mm;
the thickness of the lower heat-insulating material layer is 30mm +/-10 mm;
the thickness of the absolute vacuum layer is 20mm-60mm.
5. The vacuum insulation box device according to claim 1,
the upper heat-insulating material layer is a ceramic fiber layer.
6. The vacuum insulation box device according to claim 1,
the lower heat insulation material layer is a mesoporous material layer.
7. The vacuum insulation box device according to claim 1,
the heat preservation shell is a stainless steel shell.
8. The vacuum insulation box device according to claim 1,
the end cover of the heat preservation box comprises a cover plate and a fixed connecting plate arranged around the periphery of the top of the cover plate; the fixed connecting plate is fixed on the outer side wall of the opening of the heat-insulating shell through a fixing piece.
9. The vacuum insulation box device according to claim 8,
the cover plate is a stainless steel heat-resistant plate.
10. A method of making a vacuum insulation box arrangement according to any of claims 1-9, comprising the steps of:
manufacturing a heat insulation shell with a downward opening, and fixing an upper heat insulation material layer with a preset thickness at the top end inside the heat insulation shell to obtain a first heat insulation shell;
manufacturing a heat preservation box end cover matched with the lower opening of the first heat preservation shell, and fixing a lower heat preservation material layer at the top end of the heat preservation box end cover to obtain a first heat preservation box end cover;
fixedly mounting the first heat preservation box end cover at an opening of the first heat preservation shell, and performing vacuum treatment on a space between the upper heat preservation material layer and the lower heat preservation material layer to form an absolute vacuum layer in the space, so as to obtain a vacuum heat preservation box device;
and installing the top end of the vacuum heat-preservation box device on a position to be installed of the heat-preservation cover through a detachable structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211560581.5A CN115846431A (en) | 2022-12-07 | 2022-12-07 | Vacuum heat preservation box device and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211560581.5A CN115846431A (en) | 2022-12-07 | 2022-12-07 | Vacuum heat preservation box device and manufacturing method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN115846431A true CN115846431A (en) | 2023-03-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211560581.5A Pending CN115846431A (en) | 2022-12-07 | 2022-12-07 | Vacuum heat preservation box device and manufacturing method thereof |
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| Country | Link |
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| CN (1) | CN115846431A (en) |
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2022
- 2022-12-07 CN CN202211560581.5A patent/CN115846431A/en active Pending
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