Electric furnace and electric furnace heat insulation plate manufacturing process

Abstract

The electric furnace comprises a base, a base through hole is formed in the upper side face of the base, a detachable heat insulation disc covers the base through hole, a heat insulation plate and a heating disc are sequentially arranged on the upper side face of the heat insulation disc, and a heating pipe embedded into the bottom face of the heating disc is arranged between the heat insulation plate and the heating disc. The heat insulation plate is of an integrated structure formed by mixing ceramic fiber cotton, fumed silica, silicon carbide and mica powder, the heat insulation performance and the high-temperature resistance of the heat insulation plate can be improved, the situation that heat is transmitted to the base to heat the base is reduced, and the durability and the use safety of the electric furnace are improved.

Description

[Technical field]

[0001] The invention relates to an electric furnace and a manufacturing process of an electric furnace heat insulation board. [Background Technology]

[0002] In existing electric furnaces, a heat insulation layer is generally arranged between the base and the heating tube, but the existing heat insulation layer has poor heat insulation effect and flame retardant effect. It is easy for the heat of the heating tube to be transferred to the base during heating operation, causing the base to heat up and even causing the cables inside the base to burn, causing danger. At the same time, the existing heat insulation layer has low strength, so when placing utensils on the heating plate of the electric furnace, the heat insulation layer is prone to dents or even cracks, affecting the heat insulation effect. [Summary of the invention]

[0003] The invention overcomes the shortcomings of the prior art and provides a process for manufacturing an electric furnace and an electric furnace heat insulation board.

[0004] To achieve the above object, the present invention adopts the following technical solutions:

[0005] An electric furnace, characterized in that it includes a base, a base through hole is provided on the upper side of the base, a detachable insulation plate is provided on the upper cover of the base through hole, an insulation board and a heating plate are provided on the upper side of the insulation plate in sequence, a heating tube embedded in the bottom surface of the heating plate is provided between the insulation board and the heating plate, and the insulation board is an integrated structure made of a mixture of ceramic fiber wool, fumed silica, silicon carbide and mica powder.

[0006] The electric furnace as described above is characterized in that the proportions of ceramic fiber wool, fumed silica, silicon carbide and mica powder are 15%, 40%, 16% and 29% respectively.

[0007] An electric furnace as described above is characterized in that the fumed silica is composed of silicon dioxide and aluminum hydroxide.

[0008] The electric furnace as described above is characterized in that the ratio of silicon dioxide to aluminum hydroxide is 85% and 15%.

[0009] The electric furnace as described above is characterized in that a heat insulation disk cavity is provided on the upper side of the heat insulation disk, and the heat insulation board is arranged in the heat insulation disk cavity.

[0010] The electric furnace as described above is characterized in that the heat insulation board is arranged to cover the inner side surface of the concave cavity of the heat insulation disk.

[0011] The electric stove as described above is characterized in that a receiving groove for receiving the heating tube is provided on the bottom surface of the heating plate.

[0012] The electric furnace as described above is characterized in that the heating tube is a spiral heating tube and the receiving groove is a spiral receiving groove.

[0013] The electric stove as described above is characterized in that circular anti-slip patterns are provided on the top surface of the heating plate.

[0014] A process for manufacturing an electric furnace heat insulation board, using the above electric furnace, is characterized by comprising the following steps:

[0015] Step 1, pre-treating and drying the ceramic fiber wool, fumed silica, silicon carbide and mica powder and sieving them respectively;

[0016] Step 2, mixing and stirring the pretreated raw materials, and pouring the mixed and stirred raw materials into a storage hopper;

[0017] Step 3, discharge the mixed raw materials in the storage hopper onto the pallet;

[0018] Step 4: Pressing the uniformly mixed raw material powder into a shape by cooperating with the pressing plate and the supporting plate;

[0019] Step 5, inspecting the appearance quality of the formed insulation board;

[0020] Step six: Pack the insulation boards that pass the inspection.

[0021] The beneficial effects of the present invention are:

[0022] The present invention arranges a heat insulation plate on the base, and loads and supports the heat insulation board through the heat insulation plate, so as to improve the strength of the heat insulation board; at the same time, by mixing the raw materials in the manner of 15% of ceramic fiber cotton, 40% of fumed silica, 16% of silicon carbide and 29% of mica powder, the heat insulation performance and high temperature resistance of the heat insulation board can be improved, and the heat transferred to the base to cause the base to heat up, and even cause the internal cables to burn, wherein the fumed silica itself is a very good fireproof material, which can improve the fireproof level of the heat insulation board, and in addition, the ceramic fiber cotton, silicon carbide and mica powder have good corrosion resistance, can resist the erosion of chemical substances such as acid and alkali, and extend the service life of the heat insulation board. [Drawings]

[0023] Figure 1 It is a schematic diagram of the electric furnace structure of the present invention;

[0024] Figure 2 This is an exploded view of the electric furnace of the present invention;

[0025] Figure 3 This is a schematic diagram of the bottom of the heating plate of the present invention;

[0026] Figure 4 A three-dimensional structural diagram of the equipment for making thermal insulation panels;

[0027] Figure 5 It is a schematic diagram of the side section structure of the box of the heat insulation board manufacturing equipment;

[0028] Figure 6 for Figure 5 Another perspective structural diagram of;

[0029] Figure 7 Schematic diagram of the stirring box structure of the insulation board manufacturing equipment;

[0030] Figure 8 This is a schematic diagram of the connection structure between the discharge pipe and the gate plate of the insulation board manufacturing equipment;

[0031] Fig. 9 Schematic diagram of the connection structure between the moving plate and the supporting column of the insulation board manufacturing equipment. [Specific implementation method]

[0032] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings.

[0033] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly. In addition, the descriptions of "preferred", "sub-preferred", etc. in the present invention are only used for descriptive purposes, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of indicated technical features. Therefore, the features defined as "preferred" or "sub-preferred" may explicitly or implicitly include at least one such feature.

[0034] like Figure 1-3 As shown, an electric furnace includes a base 4, a base through hole is provided on the upper side of the base 4, a detachable heat insulation plate 5 is provided on the upper cover of the base through hole, a heat insulation board 6 and a heating plate 7 are provided on the upper side of the heat insulation plate 5 in sequence, and a heating pipe 8 is provided between the heat insulation board 6 and the heating plate 7 and embedded in the bottom surface of the heating plate 7. The heat insulation plate 5 is provided to support the heat insulation board 6, thereby improving the supporting strength of the heat insulation board.

[0035] like Figure 1-2 As shown, the upper side of the heat-insulating plate 5 is provided with a heat-insulating plate cavity, and the heat-insulating plate 6 is arranged in the heat-insulating plate cavity. The heat-insulating plate 6 covers the inner side of the heat-insulating plate cavity, so that the heat-insulating plate 5 and the heat-insulating plate 6 form a whole, which is easy to install. The top surface of the heating plate 7 is provided with a circular anti-skid pattern 72 to improve the anti-skid effect.

[0036] like Figure 3 As shown, the bottom surface of the heating plate 7 is provided with a receiving groove 71 for receiving the heating tube 8; the heating tube 8 is a spiral heating tube, and the receiving groove 71 is a spiral receiving groove. The heating tube 8 is hidden and installed in the heating plate 7 to increase the contact area and improve the heat transfer efficiency.

[0037] Among them, the insulation board 6 is an integrated structure made of ceramic fiber wool, fumed silica, silicon carbide and mica powder, and the ratios of silica, silicon carbide and mica powder are 15%, 40%, 16% and 29% respectively; fumed silica is composed of silica and aluminum hydroxide, and the ratio of silica and aluminum hydroxide group is 85% and 15%. The insulation board 6 made by the above raw material ratio can greatly improve the thermal insulation performance and high temperature resistance. Among them, fumed silica itself is a very good fireproof material, which can improve the fireproof level of the insulation board. In addition, ceramic fiber wool, silicon carbide and mica powder have good corrosion resistance, can resist the erosion of acid, alkali and other chemical substances, and extend the service life of the insulation board.

[0038] like Figure 4-9 As shown, a heat insulation board manufacturing device includes: a box body 1; a powder opening mechanism 2, which is arranged at one end of the top of the box body 1; the powder opening mechanism 2 includes a stirring box 201 and a storage hopper 202, the stirring box 201 is arranged at one end inside the box body 1, and the storage hopper 202 is arranged at an adjacent position of the stirring box 201, the stirring box 201 is rotatably connected to the storage hopper 202, one end of the side wall of the storage hopper 202 is rotatably connected to a first hydraulic cylinder 203, the output end of the first hydraulic cylinder 203 is rotatably connected to the stirring box 201, one end of the side wall of the stirring box 201 is rotatably connected to two meshing gears 204, the inner wall of the stirring box 201 is rotatably connected to two stirring shafts 205, a plurality of stirring blades 206 are fixedly connected at both ends of the stirring shaft 205, the two stirring shafts 205 are fixedly connected to the two gears 204, respectively, a motor 207 is fixedly connected to one end of the side wall of the stirring box 201, the output end of the motor 207 is fixedly connected to one of the gears 204, and a discharge pipe 208 is connected to the bottom of the storage hopper 202;

[0039] In this case, the raw materials required for the production of insulation boards were dried, screened and other pre-treatments, and then mixed in the following proportions: 15% ceramic fiber cotton, 40% fumed silica (85% fumed silica + 15% aluminum hydroxide), 16% silicon carbide and 29% mica powder. Ceramic fiber cotton, as a lightweight refractory material, has excellent thermal insulation properties. Fumed silica has extremely low thermal conductivity, which can further enhance the thermal insulation effect. Mica powder has good thermal insulation and electrical insulation properties, which can further enhance the thermal insulation properties of insulation boards. Silicon carbide has extremely high high temperature resistance and can maintain stable physical and chemical properties in high temperature environments, ensuring the safety of insulation boards under high temperature conditions. In addition, fumed silica itself is a very good fireproof material, which can significantly improve the fireproof level of insulation boards. Aluminum hydroxide, as an additive in fumed silica, also has a certain flame retardant effect, which can further enhance the fireproof properties of insulation boards. Ceramic fiber cotton , silicon carbide and mica powder: these materials have good corrosion resistance, can resist the erosion of acid, alkali and other chemical substances, and extend the service life of the insulation board. Then, the well-proportioned raw materials are put into the stirring box 201 for stirring and mixing. At this time, the motor 207 is turned on. Under the drive of the motor 207, the two gears 204 can be driven to rotate synchronously in the opposite direction, thereby driving the two stirring shafts 205 to rotate synchronously in the opposite direction. When the stirring shafts 205 rotate synchronously in the opposite direction, the stirring blades 206 can be driven to rotate. Under the mutual cooperation of the stirring blades 206 on the two stirring shafts 205, the stirring dead angle can be reduced, thereby improving the uniformity of the raw material mixing. When the raw materials are evenly mixed, the first hydraulic cylinder 203 is opened. Under the drive of the first hydraulic cylinder 203, the stirring box 201 will rotate, so that the stirred raw materials can be poured from the stirring box 201 into the storage hopper 202, and the raw materials in the storage hopper 202 will be discharged from the discharge pipe 208 for subsequent pressing.

[0040] like Figures 5 to 7 As shown, a baffle 209 is fixedly connected to the top of the storage hopper 202, and the baffle 209 is fixedly connected to the box body 1. A flange 210 is fixedly connected to the side wall of the stirring box 201 away from the storage hopper 202, and a protrusion 101 is fixedly connected to one end of the side wall of the box body 1, and the flange 210 is movably overlapped with the protrusion 101;

[0041] In this case, the design of the baffle 209 allows the raw materials to be accurately poured from the mixing box 201 into the storage hopper 202. The design of the flange 210 and the protrusion 101 allows one end of the mixing box 201 to overlap the protrusion 101 on the box body 1 through the flange 210 during the mixing of the raw materials, thereby improving stability.

[0042] like Figures 4 to 6As shown, a feed pipe 102 is slidably connected to the top of the box body 1, and a cover plate 103 is fixedly connected to the bottom of the feed pipe 102, and the cover plate 103 is located directly above the stirring box 201;

[0043] In this case, the cover plate 103 is designed to cover the opening of the stirring box 201, thereby preventing the raw materials from splashing out of the stirring box 201 during the stirring process and reducing the generation of dust. The feed pipe 102 is designed to add raw materials to the stirring box 201.

[0044] like Figures 4 to 6 As shown, a first electric telescopic rod 104 is fixedly connected to the top of the box body 1 adjacent to the feed pipe 102, and an output end of the first electric telescopic rod 104 is fixedly connected to the feed pipe 102;

[0045] In this case, the design of the first electric telescopic rod 104 can drive the feeding tube 102 to move up and down, thereby driving the cover plate 103 to move up and down, so that the cover plate 103 will not affect the rotation of the stirring box 201.

[0046] like Figure 8 As shown, a gate plate 211 is slidably connected to one end of the side wall of the discharge pipe 208, a second electric telescopic rod 212 is fixedly connected to one end of the outer wall of the discharge pipe 208, and an output end of the second electric telescopic rod 212 is fixedly connected to the gate plate 211;

[0047] In this case, the gate plate 211 can be driven to move by the second electric telescopic rod 212 , thereby controlling the discharge of the raw materials in the storage hopper 202 .

[0048] like Figure 5 , Figure 6 and Fig. 9As shown, it also includes a powder pressing mechanism 3, which includes a support column 301, a cylinder 303, a movable plate 302, a support plate 305 and a pressing plate 306. Two support columns 301 are provided and are fixedly connected to the box body 1. One end of the support column 301 is slidably connected to the movable plate 302, and the movable plate 302 is located below the discharge pipe 208. The cylinder 303 is provided between the two support columns 301 and is fixedly connected to the box body 1. The output end of the cylinder 303 is fixedly connected to the movable plate 302. A through hole is provided in the middle of the movable plate 302. A fixed frame 304 is fixedly connected to the top of the movable plate 302 at the through hole. A support plate 305 is provided in the through hole. The box body 1 A compressed powder box 105 is fixedly connected to one end of the side wall of the box body 1, the compressed powder box 105 is communicated with the box body 1, the support column 301 is fixedly connected to the compressed powder box 105, a pressing plate 306 is arranged inside the compressed powder box 105 above the support column 301, and a material taking port 106 is arranged at one end of the top of the compressed powder box 105; a third hydraulic cylinder 309 is arranged on the top of the pressing plate 306, the third hydraulic cylinder 309 is fixedly connected to the compressed powder box 105, and the output end of the third hydraulic cylinder 309 is fixedly connected to the pressing plate 306; a scraper 107 is fixedly connected to the inner wall of the box body 1 at a position adjacent to the compressed powder box 105, the bottom of the box body 1 is arranged in an inverted cone shape, and a discharge port 108 is arranged at the bottom of the box body 1;

[0049] In this case, the mixed raw materials are pressed by the design of the powder pressing mechanism 3, wherein the movable plate 302 is driven by the cylinder 303 to move to the bottom of the discharge pipe 208, and then the gate plate 211 is driven by the second electric telescopic rod 212 to move, so that the discharge pipe 208 is opened, so that the raw materials can fall from the storage hopper 202 into the fixed frame 304, and then the movable plate 302 is driven by the cylinder 303 again to move to one end of the powder pressing box 105. In this process, the scraper 107 will scrape the raw materials in the fixed frame 304 evenly, and the scraped raw materials will be removed from the fixed frame 304. The raw materials are discharged from the discharge port 108 at the bottom of the box body 1. In actual operation, a collection box can be placed under the discharge port 108 to collect the raw materials for reuse. Then the movable plate 302 will move to the bottom of the pressing plate 306. At this time, the third hydraulic cylinder 309 can be opened to drive the pressing plate 306 to move downward to press the raw materials. After the raw materials are pressed into plates, the movable plate 302 is driven to move by the cylinder 303 again to move the movable plate 302 to the material taking port 106, so as to facilitate the staff to take the materials.

[0050] like Fig. 9 As shown, a support frame 307 is fixedly connected to the bottom of the movable plate 302, the support frame 307 is slidably connected to the support column 301, a second hydraulic cylinder 308 is fixedly connected to the bottom of the support frame 307, and the output end of the second hydraulic cylinder 308 is fixedly connected to the pressing plate 306;

[0051] In this case, the second hydraulic cylinder 308 can drive the support plate 305 to move upward, so as to push the pressed insulation board out of the fixed frame 304, so that the staff can take the material easily.

[0052] like Figures 4 to 9 As shown, a process for manufacturing a heat insulation board is a process for manufacturing a heat insulation board for an electric furnace, comprising the following steps;

[0053] Step 1: Dry and screen the raw materials required for making the insulation board to ensure the quality of the raw materials;

[0054] Step 2: accurately proportion the pretreated raw materials according to a specific ratio, and mix and stir the various raw materials through a powder opening mechanism 2, wherein the proportion of the various raw materials is 15% ceramic fiber cotton, 40% fumed silica, 16% silicon carbide, and 29% mica powder, wherein the fumed silica contains 85% silicon dioxide and 15% aluminum hydroxide;

[0055] Step 3: The mixing box 201 is driven to rotate by the first hydraulic cylinder 203, so that the mixed raw materials in the mixing box 201 are poured into the storage hopper 202;

[0056] Step 4: The gate plate 211 is driven to open by the second electric telescopic rod 212, so that the raw materials in the storage hopper 202 can be discharged from the discharge pipe 208 and fall onto the support plate 305;

[0057] Step 5: The cylinder 303 drives the movable plate 302 to move below the pressing plate 306, and the third hydraulic cylinder 309 drives the pressing plate 306 to move downward to press the uniformly mixed raw material powder into a shape;

[0058] Step six, inspect the appearance quality of the formed insulation board, such as size, flatness, surface defects, etc.;

[0059] Step seven, packing the qualified insulation boards.

[0060] Working principle: The raw materials required for the production of the heat insulation board are dried, sieved and pre-treated, and then mixed in the following proportions: 15% ceramic fiber cotton, 40% fumed silica (85% silica + 15% aluminum hydroxide), 16% silicon carbide and 29% mica powder. Then the mixed raw materials are put into the stirring box 201 for stirring and mixing. At this time, the motor 207 is turned on. Under the drive of the motor 207, the two gears 204 can be driven to rotate synchronously in the opposite direction, thereby driving the two stirring shafts 205 to rotate synchronously in the opposite direction. When the stirring blades 206 rotate synchronously in the opposite direction, the stirring blades 206 can be driven to rotate. With the cooperation of the stirring blades 206 on the two stirring shafts 205, the stirring dead angle can be reduced, thereby improving the uniformity of raw material mixing. When the raw materials are evenly mixed, the first hydraulic cylinder 203 is opened, and the stirring box 201 is driven by the first hydraulic cylinder 203 to rotate, so that the stirred raw materials can be poured from the stirring box 201 into the storage hopper 202. Then, the cylinder 303 is opened, and the cylinder 303 drives the moving plate 302 to move to the bottom of the discharge pipe 208. Then, the gate plate 211 is driven to move by the second electric telescopic rod 212 to open the discharge pipe 208, so that the raw materials can fall from the storage hopper 202 into the fixed frame 304, and then the movable plate 302 is driven by the cylinder 303 to move toward one end of the powder pressing box 105. During this process, the scraper 107 will scrape the raw materials in the fixed frame 304 evenly, and the scraped raw materials will be discharged from the discharge port 108 at the bottom of the box body 1. In actual operation, a collection box can be placed under the discharge port 108 to collect the raw materials for reuse. Then The movable plate 302 will move to the bottom of the pressing plate 306. At this time, the third hydraulic cylinder 309 can be opened to allow the third hydraulic cylinder 309 to drive the pressing plate 306 to move downward, thereby pressing the raw material. After the raw material is pressed into a plate, the movable plate 302 is driven to move by the cylinder 303 again, and the movable plate 302 is moved to the material taking port 106. At this time, the second hydraulic cylinder 308 is opened, and the second hydraulic cylinder 308 can drive the support plate 305 to move upward, thereby ejecting the pressed insulation board from the fixed frame 304 to facilitate the staff to take the material.

[0061] The above are only preferred embodiments of the present invention, and are not intended to limit the patent scope of the present invention. All equivalent structural changes made using the contents of the present invention's specification and drawings under the inventive concept of the present invention, or directly or indirectly applied in other related technical fields, are included in the patent protection scope of the present invention.

Claims

1. An electric furnace, characterized in that: The invention comprises a base (4), wherein the upper side of the base (4) is provided with a base through hole, the upper cover of the base through hole is provided with a detachable heat insulation plate (5), the upper side of the heat insulation plate (5) is provided with a heat insulation board (6) and a heating plate (7) in sequence, and a heating pipe (8) is provided between the heat insulation board (6) and the heating plate (7) and is embedded in the bottom surface of the heating plate (7), and the heat insulation board (6) is an integrated structure made of a mixture of ceramic fiber cotton, fumed silica, silicon carbide and mica powder.

2. An electric furnace according to claim 1, characterized in that: The proportions of ceramic fiber wool, fumed silica, silicon carbide and mica powder are 15%, 40%, 16% and 29% respectively.

3. An electric furnace according to claim 1 or 2, characterized in that: Fumed silica is composed of silicon dioxide and aluminum hydroxide.

4. An electric furnace according to claim 3, characterized in that: The ratio of silicon dioxide to aluminum hydroxide is 85% and 15%.

5. An electric furnace according to claim 1, characterized in that: A heat-insulating disc concave cavity is arranged on the upper side of the heat-insulating disc (5), and a heat-insulating plate (6) is arranged in the heat-insulating disc concave cavity.

6. An electric furnace according to claim 1, characterized in that: The heat insulation plate (6) is arranged to cover the inner side surface of the heat insulation disc cavity.

7. An electric furnace according to claim 1, characterized in that: The bottom surface of the heating plate (7) is provided with an accommodating groove (71) for accommodating the heating tube (8).

8. An electric furnace according to claim 7, characterized in that: The heating tube (8) is a spiral heating tube, and the accommodating groove (71) is a spiral accommodating groove.

9. An electric furnace according to claim 1, characterized in that: A circular anti-slip pattern (72) is provided on the top surface of the heating plate (7).

10. A process for manufacturing an electric furnace heat insulation board, using the electric furnace according to any one of claims 1 to 9, characterized in that: The steps include: Step 1, pre-treating and drying the ceramic fiber wool, fumed silica, silicon carbide and mica powder and sieving them respectively; Step 2, mixing and stirring the pretreated raw materials, and pouring the mixed and stirred raw materials into a storage hopper; Step 3, discharge the mixed raw materials in the storage hopper onto the support plate; Step 4: Pressing the uniformly mixed raw material powder into a shape by cooperating with the pressing plate and the supporting plate; Step 5, inspecting the appearance quality of the formed insulation board; Step six: Pack the qualified insulation boards.

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