Heating device of large detachable thermal field

Abstract

The utility model discloses a heating device of a large-scale detachable thermal field, which comprises a metal plate outer shell layer, a thermal insulation fiber layer and a heating resistance wire layer which are arranged in the outer shell layer, and a metal plate inner shell layer which is arranged outside the thermal insulation fiber layer and the heating resistance wire layer in the outer shell. The inner shell layer, the heat preservation fiber layer and the heating resistance wire layer are divided into a plurality of unit heating modules in the axial direction of the outer shell layer, and the unit heating modules are axially spliced to form a thermal field which is installed in the outer shell layer. The thermal field is divided into a plurality of unit modules, transportation difficulty and high cost caused by large weight and large size of a single body can be reduced, the unit modules have convenient replaceability, and the maintenance cost is reduced; compared with a single-layer shell metal plate design, the inner-layer metal plate design is added, the thickness of the heat preservation fibers is effectively reduced, heat dissipation can be conducted between the two layers of metal plate shells in an air or vacuum or water cooling mode, and the temperature of the metal plate shell can be controlled to be lower than that of the single-layer shell metal plate design.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of electric heating, and specifically relates to a heating device with large-scale detachable heat field. BACKGROUND

[0002] In a conventional large-scale heating device, heat insulation fibers are laid in a sheet metal outer shell, and heating resistance wires are installed on the heat insulation fibers, so that the heater can heat objects. The overall assembly of the heating device needs to be completed before installation on site. For large-scale heating devices, the overall assembly after completion needs to be transported to the site for installation, which is difficult and costly. The environment of the installation site is highly limited, and the difficulty of later maintenance is also high. SUMMARY

[0003] Therefore, the utility model aims to provide a heating device with large-scale detachable heat field.

[0004] To solve the above technical problems, the technical scheme of the utility model is as follows: a heating device with large-scale detachable heat field, comprising a sheet metal outer shell layer, a heat insulation fiber layer and a heating resistance wire layer arranged in the outer shell layer, and a sheet metal inner shell layer arranged outside the heat insulation fiber layer and the heating resistance wire layer in the outer shell. The inner shell layer, the heat insulation fiber layer and the heating resistance wire layer are divided into several unit heating modules in the axial direction of the outer shell layer. The several unit heating modules are axially spliced to form a heat field installed in the outer shell layer.

[0005] Preferably, the outer shell layer is equally divided into two or more outer shell blocks in the radial direction, and the inner shell layer and the heat insulation fiber layer in the unit heating module are also equally divided into two or more inner shell blocks and heat insulation fiber blocks in the radial direction.

[0006] Further, the two ends of the heat insulation fiber block are shaped into steps that can be connected end to end.

[0007] Preferably, a heat insulation cavity layer is formed between the outer shell layer and the inner shell layer, and a retaining ring is provided at the end of the unit heating module at both ends to close the heat insulation cavity layer.

[0008] Further, a surrounding barrier is formed on the retaining ring, which is used to fix the superposition of the outer shell layer and the inner shell layer, and the surrounding barrier is clamped between the outer shell layer and the inner shell layer.

[0009] Further, the heat insulation cavity layer is arranged as a closed space, and the closed heat insulation cavity layer is vacuumized, and the heat insulation cavity layer forms a vacuum heat insulation layer between the outer shell layer and the inner shell layer.

[0010] Further, the heat insulation cavity layer is arranged as a closed space, water is injected into the closed heat insulation cavity layer, and the heat insulation cavity layer forms a water-cooled heat insulation layer between the outer shell layer and the inner shell layer.

[0011] The technical effects of the utility model mainly show in following aspects: (1) split the hot field into multiple unit modules, can reduce the difficulty of transportation and high cost caused by the large weight and volume of single body, the unit module has convenient replaceability, and the maintenance cost is reduced; (2) compared with single-layer shell sheet metal design, the thickness of thermal insulation fiber is effectively reduced by increasing inner layer sheet metal design, and the temperature of sheet metal shell can also be controlled lower than that of single-layer shell sheet metal design by using air, vacuum, water cooling and other modes of heat dissipation between the two-layer sheet metal shells. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is a whole structure schematic diagram of the utility model;

[0013] Figure 2 It is a part exploded structure schematic diagram of the utility model;

[0014] Figure 3 It is a whole cross section structure schematic diagram of the utility model;

[0015] Figure 4 It is the A part enlarged structure schematic diagram of the utility model; Figure 4

[0016] Figure 5 It is a part structure exploded schematic diagram of the utility model.

[0017] 1-outer shell layer; 11-outer shell block; 2-thermal insulation fiber layer; 21-thermal insulation fiber block; 211-step; 3-heating resistance wire layer; 4-inner shell layer; 41-inner shell block; 5-heat insulation cavity layer; 6-retaining ring; 61-enclosure. DETAILED DESCRIPTION

[0018] The specific embodiments of the utility model are further described in detail below in combination with the drawings, so that the technical scheme of the utility model is easier to understand and master. EMBODIMENT

[0019] According to Figures 1-5 As shown in the figure, a large-scale detachable heating device of hot field, the existing large-scale heating device includes sheet metal outer shell layer 1, thermal insulation fiber layer 2 and heating resistance wire layer 3 arranged in the outer shell layer 1, generally, the heating device is assembled as a whole, then installed on site, compared with small and medium-sized heating device, it is easy to transport and pack, and the large-scale heating device often encounters many difficulties in the process of transportation, and has certain requirements on the height of installation environment when installed on site. ​

[0020] In the present application, the heat insulation fiber layer 2 and the heating resistance wire layer 3 in the outer shell layer 1 are further provided with a sheet metal inner shell layer 4, and the inner shell layer 4, the heat insulation fiber layer 2 and the heating resistance wire layer 3 are divided into several segmental unit heating modules in the axial direction of the outer shell layer 1, and the several segmental unit heating modules are axially spliced to form a hot field installed in the outer shell layer 1.

[0021] The hot field is divided into several unit heating modules, which can reduce the difficulty in transportation and high cost due to the large weight and large volume of the single body, and when assembled on site, it can be layered, packed and installed, the height requirement of the installation site environment is reduced, and the unit heating module has convenient replaceability, which can be replaced individually to reduce maintenance cost.

[0022] In order to reduce the volume of the outer shell layer 1 and the unit heating module to a greater extent, the outer shell layer 1 is equally divided into two or more outer shell blocks 11 in the radial direction, and the inner shell layer 4 and the heat insulation fiber layer 2 in the unit heating module are also equally divided into two or more inner shell blocks 41 and heat insulation fiber blocks 21 in the radial direction; the outer shell blocks 11 can be connected and fixed by welding or connecting pieces, and the inner shell blocks 41 can be connected and fixed by welding or connecting pieces; the two ends of the heat insulation fiber block 21 are respectively formed into steps 211 that can be connected end to end, and when two adjacent heat insulation fiber blocks 21 are spliced in the radial direction, the steps 211 at the ends are connected and positioned with each other, and finally fixed by the inner shell layer 4.

[0023] A heat insulation cavity layer 5 is formed between the outer shell layer 1 and the inner shell layer 4, and a retaining ring 6 for closing the heat insulation cavity layer 5 is arranged at the end of the unit heating module at the two ends; a surrounding retaining portion 61 is formed on the retaining ring 6, which is used for fixedly combining with the outer shell layer 1 and the inner shell layer 4, and is clamped between the outer shell layer 1 and the inner shell layer 4; generally, the outer shell layer 1 is pressed on the surrounding retaining portion 61, and the surrounding retaining portion 61 is pressed on the inner shell 4, forming a laminated structure.

[0024] When the heat insulation cavity layer 5 is arranged as a closed space, the closed heat insulation cavity layer 5 is vacuumized, and the heat insulation cavity layer 5 forms a vacuum heat insulation layer between the outer shell layer 1 and the inner shell layer 4.

[0025] When the heat insulation cavity layer 5 is arranged as a closed space, water or other condensed liquid is injected into the closed heat insulation cavity layer 5, and the heat insulation cavity layer 5 forms a water-cooled heat insulation layer between the outer shell layer 1 and the inner shell layer 4.

[0026] Compared with the single-layer shell sheet metal design, the inner-layer sheet metal design effectively reduces the thickness of the thermal insulation fiber, and the air, vacuum, water cooling and other methods can be used for heat dissipation between the two-layer sheet metal shell, so that the temperature of the sheet metal shell can also be controlled lower than the single-layer shell sheet metal design.

Claims

1. A heating device with a large detachable thermal field, comprising a sheet metal outer shell layer, a heat-insulating fiber layer disposed within the outer shell layer, and a heating resistance wire layer, characterized in that: Outside the insulation fiber layer and the heating resistance wire layer inside the outer shell, a sheet metal inner shell layer is also provided. The inner shell layer, insulation fiber layer and heating resistance wire layer are divided into several unit heating modules in the axial direction of the outer shell layer. The several unit heating modules are axially spliced ​​to form a thermal field and installed inside the outer shell layer.

2. The heating device for a large, detachable thermal field according to claim 1, characterized in that: The outer shell layer is divided into two or more outer shell blocks in the radial direction, and the inner shell layer and the heat insulation fiber layer in the unit heating module are also divided into two or more inner shell blocks and heat insulation fiber blocks in the radial direction, respectively.

3. The heating device for a large, detachable thermal field according to claim 2, characterized in that: The two ends of the thermal insulation fiber block are respectively formed into steps that can be interlocked end to end.

4. The heating device for a large, detachable thermal field according to claim 1, characterized in that: A heat insulation cavity layer is formed between the outer shell layer and the inner shell layer, and retaining rings for sealing the heat insulation cavity layer are provided at the ends of the unit heating modules at both ends.

5. The heating device for a large, detachable thermal field according to claim 4, characterized in that: The retaining ring has a baffle formed on it, which is used to overlap and fix with the outer shell layer and the inner shell layer, and the baffle is sandwiched between the outer shell layer and the inner shell layer.

6. The heating device for a large, detachable thermal field according to claim 4, characterized in that: The heat insulation cavity layer is configured as a closed space. A vacuum is drawn into the closed heat insulation cavity layer, and the heat insulation cavity layer forms a vacuum heat insulation layer between the outer shell layer and the inner shell layer.

7. The heating device for a large, detachable thermal field according to claim 4, characterized in that: The heat insulation cavity layer is configured as a closed space. Water is injected into the closed heat insulation cavity layer, and the heat insulation cavity layer forms a water-cooled heat insulation layer between the outer shell layer and the inner shell layer.

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