Heat preservation structure of continuous heat treatment furnace

Abstract

The utility model discloses a heat preservation structure of a continuous heat treatment furnace, and belongs to the technical field of heat treatment furnaces. Comprising a furnace wall plate heat preservation body, a furnace top plate heat preservation body and a heating element, and the furnace wall plate heat preservation body comprises an aluminum silicate fiber blanket a pasted on the inner wall of a furnace wall plate and high-density fiber cotton a arranged on the inner side of the aluminum silicate fiber blanket a; the furnace top plate heat preservation body comprises a furnace top frame installed on the inner wall of the furnace top plate, high-density fiber cotton b installed on the inner side of the furnace top frame and an aluminum silicate fiber blanket b pasted to the outer side of the furnace top frame, the heating element comprises an alloy resistance tape, and the alloy resistance tape is fixed to the inner surface of the high-density fiber cotton a through ceramic screws. The heating and heat preservation efficiency of the furnace body is improved, heat energy loss in the heating process is reduced, meanwhile, convenience is provided for internal maintenance of the furnace body, and therefore the heat treatment efficiency is improved, the purposes of saving energy and reducing consumption are achieved, and meanwhile the later maintenance cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of continuous heat treatment furnaces, in particular to a heat preservation structure of a continuous heat treatment furnace. Background Art

[0002] A heat treatment furnace is an electric furnace or fuel furnace used for heat treatment of furnace materials. A continuous heat treatment furnace is a furnace in which workpieces are continuously loaded from the loading door, and after heat treatment in the furnace, they are continuously unloaded from the discharging door. It is used for continuous heat treatment and heating of workpieces in batches.

[0003] The traditional continuous heat treatment furnace insulation structure is divided into insulation layer and refractory layer. The inner layer of the high-temperature heat treatment furnace is built with high-alumina bricks (clay bricks) and the top of the furnace is in the form of an arch; the middle is filled with expanded perlite, and the outer layer is covered with aluminum silicate fiber felt; the heating element uses "resistance wire + porcelain sleeve" and is mounted on a hook.

[0004] The inner refractory bricks of this type of furnace are affected by high temperatures and will be squeezed and deformed, or even the entire insulation structure will collapse, making it impossible for workpieces to pass normally. However, due to internal space limitations, maintenance is difficult. In addition, the resistance wire is nested in the porcelain tube, and the hook for mounting the resistance wire is built into the refractory bricks. The resistance wire is easily scraped off by the workpiece, and it is difficult to disassemble the resistance wire after it is damaged, aged, or broken, and it is easily fallen off and damaged due to high temperatures.

[0005] In summary, the heating elements of traditional continuous heat treatment furnaces are easily damaged, difficult to repair, have a long cycle and high cost, which not only affects the heat treatment effect, but also causes high energy consumption and increases production costs. Utility Model Content

[0006] The purpose of the utility model is to provide a heat preservation structure of a continuous heat treatment furnace to improve the heat treatment efficiency, achieve the purpose of energy saving and consumption reduction, and reduce the subsequent maintenance cost, so as to solve the problems raised in the above-mentioned background technology, such as high energy consumption, easy damage of heating elements, and high maintenance cost after failure.

[0007] The technical solution adopted by the utility model is as follows:

[0008] A thermal insulation structure of a continuous heat treatment furnace, comprising a furnace wall plate thermal insulation body, a furnace roof plate thermal insulation body and a heating element 7, wherein the furnace wall plate thermal insulation body comprises an aluminum silicate fiber blanket a2 adhered to the inner wall of the furnace wall plate 1 and a high-density fiber cotton a6 arranged on the inner side of the aluminum silicate fiber blanket a2, the furnace roof plate thermal insulation body comprises a furnace roof frame installed on the inner wall of the furnace roof plate 13, high-density fiber cotton b4 installed on the inner side of the furnace roof frame and an aluminum silicate fiber blanket b3 adhered to the outer side of the furnace roof frame, and the heating element 7 comprises an alloy resistance strip 8, which is fixed to the inner surface of the high-density fiber cotton a6 by a ceramic screw 9.

[0009] The outer surface of the high-density fiber cotton a6 is sprayed with high-temperature fire-resistant coating.

[0010] The high-density fiber wool a6 is fixed on the furnace wall plate 1 by means of anchor screws welded on the inner wall of the furnace wall plate 1 and anchor bolts on the anchor screws.

[0011] The alloy resistance strips 8 are welded together by alloy welding rods.

[0012] The furnace top frame is welded by angle steels 12 , and anchor screws 11 are welded inside the angle steels 12 . The high-density fiber wool b4 is fixed to the furnace top frame by anchor bolts 10 on the anchor screws 11 .

[0013] In summary, due to the adoption of the above technical solution, the beneficial effects of the utility model are:

[0014] 1. The furnace wall insulation body composed of aluminum silicate fiber blanket and high-density fiber cotton in the utility model has better heat preservation and high temperature resistance, which can prolong its service life;

[0015] 2. The furnace roof insulation body composed of the furnace roof frame, high-density fiber cotton and aluminum silicate fiber blanket in the utility model can form a closed space to ensure better thermal insulation. At the same time, the furnace roof insulation body is separately arranged from the furnace wall insulation body. The furnace roof insulation body is installed in blocks through the furnace roof frame, which is convenient for disassembly and maintenance in case of failure in the furnace;

[0016] 3. The heating element composed of alloy resistance band and ceramic screws in the utility model, wherein the resistance band is made of high-strength alloy material, welded into one body by alloy welding rods, and fixed on high-density fiber cotton by ceramic screws. The resistance band fits tightly to the fiber cotton, and has the advantages of convenient installation, high heating efficiency, and simple maintenance when aging or damage occurs.

[0017] The utility model improves the heating and heat preservation efficiency of the furnace body, reduces the heat energy loss during the heating process, and provides convenience for the internal maintenance of the furnace body, thereby improving the heat treatment efficiency, achieving the purpose of energy saving and consumption reduction, and reducing the subsequent maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the utility model;

[0019] Figure 2 It is a schematic diagram of the structure of the heating element of the utility model;

[0020] Figure 3 It is a structural schematic diagram of the furnace top plate insulation body of the utility model;

[0021] In the figure: 1-furnace wall plate; 2-aluminum silicate fiber blanket a; 3-aluminum silicate fiber blanket b; 4-high-density fiber cotton b; 6-high-density fiber cotton a; 7-heating element; 8-alloy resistance belt; 9-ceramic screw; 10-anchor bolt; 11-anchor screw; 12-angle steel; 13-furnace top plate. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Generally, the components of the embodiment of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0023] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0025] Example

[0026] like Figure 1-3 The present embodiment provides an insulation structure of a continuous heat treatment furnace, including a furnace wall plate insulation body, a furnace roof plate insulation body and a heating element 7, the furnace wall plate insulation body includes an aluminum silicate fiber blanket a2 pasted on the inner wall of the furnace wall plate 1 and a high-density fiber cotton a6 arranged on the inner side of the aluminum silicate fiber blanket a2, the furnace roof plate insulation body includes a furnace top frame installed on the inner wall of the furnace top plate 13, high-density fiber cotton b4 installed on the inner side of the furnace top frame and an aluminum silicate fiber blanket b3 pasted on the outer side of the furnace top frame, the heating element 7 includes an alloy resistance strip 8, and the alloy resistance strip 8 is fixed to the inner surface of the high-density fiber cotton a6 by a ceramic screw 9.

[0027] The aluminum silicate fiber blanket a2 is an aluminum silicate needle-punched blanket.

[0028] The outer surface of the high-density fiber cotton a6 is sprayed with high-temperature fire-resistant coating.

[0029] The high-density fiber wool a6 is fixed on the furnace wall plate 1 by means of anchor screws welded on the inner wall of the furnace wall plate 1 and anchor bolts on the anchor screws.

[0030] The alloy resistance strips 8 are welded together by alloy welding rods.

[0031] The furnace top frame is welded by angle steels 12 , and anchor screws 11 are welded inside the angle steels 12 . The high-density fiber wool b4 is fixed to the furnace top frame by anchor bolts 10 on the anchor screws 11 .

[0032] The installation principle of the utility model is to weld anchor screws on the inner wall of the furnace wall plate 1, and lay aluminum silicate fiber blanket a2 on the inner surface of the furnace wall plate 1, and then use the anchor bolts on the anchor screws to fix the high-density fiber cotton a6 on the furnace wall plate, and after manually tamping and pressing it, spray high-temperature refractory coating on the surface to make it have better thermal insulation and high-temperature resistance, and improve its service life; then install the heating element 7;

[0033] The alloy resistance band 8 of the heating element 7 is installed by welding the alloy resistance band 8 into a whole by using an alloy welding rod. The resistance band is a high-strength alloy material, and then it is fixed to the surface of the high-density fiber cotton 6 by a ceramic screw 9. It is required that the resistance band 8 fits tightly with the ceramic screw 9 and is connected to an external heating power supply; it is convenient to install, has high heating efficiency, and is simple to repair when aging or damage occurs.

[0034] The furnace roof insulation body mainly includes a furnace roof frame welded by angle steels 12, and anchor screws 11 are welded on the upper part thereof. The high-density fiber blocks b4 are fixed to the furnace roof frame by anchor bolts 10, and they fit tightly to each other. After the furnace roof insulation body is prefabricated, it is hoisted in blocks and installed on the top of the furnace; then an aluminum silicate fiber blanket b3 is pasted on its outer surface, and finally the furnace roof plate 13 is installed on the furnace top to form a closed space to ensure that it has better thermal insulation. At the same time, the prefabricated furnace roof structure is "movable", which is convenient for disassembly and maintenance when a fault occurs in the furnace.

Claims

1. A thermal insulation structure of a continuous heat treatment furnace, comprising a furnace wall plate thermal insulation body, a furnace roof plate thermal insulation body and a heating element (7), characterized in that: The furnace wall insulation body comprises an aluminum silicate fiber blanket a (2) adhered to the inner wall of the furnace wall board (1) and a high-density fiber cotton a (6) arranged on the inner side of the aluminum silicate fiber blanket a (2); the furnace roof insulation body comprises a furnace roof frame installed on the inner wall of the furnace roof board (13), high-density fiber cotton b (4) installed on the inner side of the furnace roof frame and an aluminum silicate fiber blanket b (3) adhered to the outer side of the furnace roof frame; the heating element (7) comprises an alloy resistance band (8), and the alloy resistance band (8) is fixed to the inner surface of the high-density fiber cotton a (6) by a ceramic screw (9).

2. The heat preservation structure of a continuous heat treatment furnace according to claim 1, characterized in that: The outer surface of the high-density fiber cotton a (6) is sprayed with high-temperature refractory coating.

3. The heat preservation structure of a continuous heat treatment furnace according to claim 1, characterized in that: The high-density fiber cotton a (6) is fixed to the furnace wall plate (1) by means of anchor screws welded to the inner wall of the furnace wall plate (1) and anchor bolts on the anchor screws.

4. The heat preservation structure of a continuous heat treatment furnace according to claim 1, characterized in that: The alloy resistance strips (8) are welded together by alloy welding rods.

5. The heat preservation structure of a continuous heat treatment furnace according to claim 1, characterized in that: The furnace top frame is welded from angle steel (12) and has anchor screws (11) welded inside. The high-density fiber cotton b (4) is fixed to the furnace top frame by anchor bolts (10) on the anchor screws (11).

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