High temperature box type resistance furnace without heater at the bottom

Abstract

The present invention discloses a high-temperature box-type resistance furnace without a heater at the furnace bottom, relates to the technical field of heat treatment equipment, and solves the technical problems of large space required for maintenance of trolley-type resistance furnaces and poor heat preservation. The present invention includes the interior of the furnace body being sealed by a structural member, characterized in that: gas nozzles are provided on the left and right sides of the furnace body, the upper side of the furnace body is sealed by a heat insulation board, the gas nozzle on the left side seals the furnace body, the right side of the furnace body is sealed by a brick wall, the lower side of the furnace body is also sealed by a brick wall, and a heat insulation board is also attached to the lower side of the brick wall on the lower side of the furnace body, and a resistance heating wire is provided on the furnace wall inside the furnace body, the resistance heating wire is wound into a corrugated shape and installed on a porcelain nail hanger on the furnace wall; used for heat treatment of industrial materials, the present invention has the advantages of small space required for maintenance and good heat preservation.

Description

Technical Field

[0001] The present invention relates to the technical field of heat treatment equipment, and more specifically to the technical field of high-temperature box-type resistance furnace without a heater at the furnace bottom. Background Art

[0002] Industrial furnaces are key equipment for industrial heating. Industrial heating is an important part of my country's manufacturing industry, a major energy consumer, and a serious source of pollution. Especially for high-temperature fuel furnaces above 1200°C, a large amount of nitrogen oxides will be produced during the production process. Nitrogen oxides can cause acid rain, aggravate the greenhouse effect, destroy the ozone layer, and cause photochemical smog. At the same time, the fuel furnace needs to continuously provide combustion-supporting air into the furnace during the combustion of fuel, which leads to severe oxidation of the workpiece surface and large oxidation and burning losses, especially for heating expensive alloy steel products, which will cause a huge increase in product costs.

[0003] Box-type resistance furnaces are suitable for R&D departments and laboratories of various factories for sintering of metal materials and ceramic materials, heat treatment of certain single crystals, detection and research of high-temperature reburning tests of refractory materials, etc. However, the temperature inside the resistance furnace is too high and there is no good sealing effect.

[0004] Generally, the existing common resistance furnace is a trolley type resistance furnace, and the furnace top adopts an arch structure. Maintenance or other construction cannot be done on the top of the furnace body. The resistance furnace can only be used for baking and is not convenient for maintenance. Once the structural parts of the resistance furnace are damaged or need to be replaced, a large space is used, which is not conducive to saving factory space. Summary of the invention

[0005] The purpose of the present invention is to solve the problems that the existing trolley-type resistance furnace requires a large space for maintenance and cannot keep warm well. The present invention provides a high-temperature box-type resistance furnace without a heater at the bottom of the furnace.

[0006] In order to achieve the above-mentioned purpose, the present invention specifically adopts the following technical solutions:

[0007] A high-temperature box-type resistance furnace without a heater at the bottom of the furnace comprises a furnace body, the interior of the furnace body is sealed by a structural member, the left and right sides of the furnace body are provided with air nozzles, the upper side of the furnace body is sealed by an insulation board, the air nozzle on the left side seals the furnace body, the right side of the furnace body is sealed by a brick wall, the lower side of the furnace body is also sealed by a brick wall, the lower side of the furnace body is also sealed by a brick wall, an insulation board is also attached to the lower side of the brick wall on the lower side of the furnace body, a resistance heating wire is provided on the furnace wall inside the furnace body, the resistance heating wire is wound into a corrugated shape and installed on a porcelain nail hanger on the furnace wall.

[0008] It is further explained that the upper side of the furnace body is provided with an inspection platform, the lower side of the inspection platform is provided with a bottom plate, and the lower side of the bottom plate is provided with the heat insulation board.

[0009] It is further explained that the right side of the furnace body has a first support column and a second support column, the furnace body is located between the first support column and the second support column, and a lifting drive machine is fixed on the upper side of the first support column.

[0010] It is further explained that the upper sides of the first support column and the second support column are provided with a crossbeam, and the upper sides of the crossbeam are provided with a plurality of rotating sprockets, and the sprockets are meshedly connected with the driving gears of the lifting drive machine through a closed chain belt.

[0011] It is further explained that the sprocket is meshedly connected with the first chain and the second chain at the upper side of the sprocket, and the lower sides of the first chain and the second chain are fixedly connected with the air nozzle member on the right side.

[0012] It is further explained that the air nozzle piece is provided between the first support column and the second support column, and the air nozzle piece is attached to the inner wall between the first support column and the second support column.

[0013] To further explain, the right air nozzle piece is located on the right side of the brick wall and is attached to the brick wall.

[0014] Further explanation: a material pier is built on the upper side of the brick wall on the lower side of the furnace body. The material pier is made of steel fiber prefabricated brick material, and a heat-resistant steel material rack is placed on the material pier.

[0015] It is further explained that there is a heat insulation board between the material pier and the heat-resistant steel material rack.

[0016] It is further explained that the material of the heat insulation board is ceramic fiber.

[0017] The beneficial effects of the present invention are as follows:

[0018] 1. The left and right sides of the furnace body of the present invention are provided with air nozzles, the upper side of the furnace body is sealed by a heat insulation board, the air nozzle on the left side seals the furnace body, the right side of the furnace body is sealed by a brick wall, the lower side of the furnace body is also sealed by a brick wall, and the lower side of the brick wall on the lower side of the furnace body is also fitted with a heat insulation board. The interior of the furnace body is provided with a resistance heating wire, and the temperature in the furnace body is kept constant by the heat generated by the resistance heating wire and the auxiliary heating of the air nozzle. When the furnace body needs to discharge heat, the air nozzle can discharge the heat in the furnace body. The resistance heating wire is wound into a corrugated shape to increase the heating length of the resistance heating wire and provide more heat in the furnace body. The resistance heating wire is mounted on a porcelain nail hanger on the furnace wall and is suspended and fixed.

[0019] 2. The upper side of the furnace body of the present invention is provided with a maintenance platform, and the maintenance platform and the furnace body are used in one body to save space.

[0020] 3. The lifting drive motor of the present invention rotates to rotate the driving gear, which drives the left sprocket to rotate through the action of the chain belt, so that the first chain and the second chain move. The movement of the first chain and the second chain rotates the other two sprockets. The movement of the first chain and the second chain pulls the air nozzle part up and down, which is convenient for the staff to inspect the air nozzle part on the inspection platform.

[0021] 4. The furnace body of the present invention has an inspection platform on the upper side, and a bottom plate on the lower side. The lower side of the bottom plate has the heat insulation plate, so that the temperature in the furnace body will not be transmitted to the bottom plate to avoid scalding the feet of the staff.

[0022] 5. A material pier is embedded on the upper side of the brick wall at the lower side of the furnace body of the present invention, and the material pier supports the heat-resistant steel material rack. An insulating plate is provided between the material pier and the heat-resistant steel material rack to avoid heat loss from the temperature of the product placed on the heat-resistant steel material rack being transmitted to the brick wall at the lower side of the furnace body through the material pier; the material pier is made of steel fiber prefabricated brick material, and the heat-resistant steel material rack is placed on the material pier. When the weight of the product placed on the upper side of the heat-resistant steel material rack is too heavy, the material pier is made of steel fiber prefabricated brick material to prevent the material pier from being broken by the overweight product.

[0023] 6. The material of the heat insulation board of the present invention is ceramic fiber, which can provide good heat insulation and a certain supporting strength. The heat insulation board will not fold or deform within the supporting strength range. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the cross-sectional structure in the main viewing direction of the present invention;

[0025] Figure 2 It is a schematic diagram of the cross-sectional structure of the present invention in the side view direction.

[0026] Figure numerals: 1-lifting drive machine, 2-air nozzle, 3-bottom plate, 4-furnace body, 5-resistance heating wire, 6-maintenance platform, 7-heat-resistant steel material rack, 8-material pier, 9-first support column, 10-first chain, 11-drive gear, 12-sprocket, 14-second chain, 15-second support column. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0028] Example 1

[0029] like Figures 1 to 2As shown, this embodiment provides a high-temperature box-type resistance furnace without a heater at the bottom of the furnace, including a furnace body 4, the interior of the furnace body 4 is sealed by a structural member, the left and right sides of the furnace body 4 are provided with air nozzles 2, the upper side of the furnace body 4 is sealed by an insulation board, the air nozzle 2 on the left seals the furnace body 4, the right side of the furnace body 4 is sealed by a brick wall, the air nozzle 2 on the right is located on the right side of the brick wall and fits the brick wall, the lower side of the furnace body 4 is also sealed by a brick wall (the brick wall on the lower side of the furnace body 4 is not installed with a heater), the lower side of the furnace body 4 is also sealed by a brick wall, and the lower side of the brick wall on the lower side of the furnace body 4 is also fitted with an insulation board, and a resistance heating wire 5 is provided on the furnace wall inside the furnace body 4, the resistance heating wire 5 is wound into a corrugated shape to increase the heating length of the resistance heating wire 5 to provide more heat in the furnace body 4, and the resistance heating wire 5 is installed on a porcelain nail hanger on the furnace wall and is hung and fixed.

[0030] The furnace body 4 has an inspection platform 6 on its upper side, the inspection platform 6 has a bottom plate 3 on its lower side, and the bottom plate 3 has the heat insulation board on its lower side.

[0031] The right side of the furnace body 4 has a first support column 9 and a second support column 15, and the furnace body 4 is located between the first support column 9 and the second support column 15. A lifting drive machine 1 is fixed on the upper side of the first support column 9, and a crossbeam 13 is provided on the upper side of the first support column 9 and the second support column 15. The upper side of the crossbeam 13 has a plurality of rotating sprockets 12, and the sprockets 12 are meshed and connected with a driving gear 11 of the lifting drive machine 1 through a closed chain belt.

[0032] The sprocket 12 is meshedly connected with the first chain 10 and the second chain 14 on the upper side of the sprocket 12. The first chain 10 and the second chain 14 are fixedly connected with the air nozzle piece 2 on the right side by extending to the lower side of the cross beam 13. The air nozzle piece 2 is provided between the first support column 9 and the second support column 15, and the air nozzle piece 2 is attached to the inner wall between the first support column 9 and the second support column 15.

[0033] A material pier 8 is built on the upper side of the brick wall on the lower side of the furnace body 4. The material pier 8 is made of steel fiber prefabricated brick material. A heat-resistant steel material rack 7 is placed on the material pier 8. When the weight of the product placed on the upper side of the heat-resistant steel material rack 7 is too heavy, the material pier 8 is made of steel fiber prefabricated brick material to prevent the material pier 8 from being broken by the overweight product. An insulation board can be added between the material pier 8 and the heat-resistant steel material rack 7.

[0034] Example 2

[0035] like Figure 1 , 2 As shown, the specific working principle of the above embodiment is as follows:

[0036] Since the inspection platform 6 is located on the upper side of the furnace body 4, the furnace body 4 and the inspection platform 6 are separated, and each plays its own role. The inspection platform 6 is used to inspect the gas nozzle 2, and the furnace body 4 is used to heat the workpiece inside. In this way, the inspection platform 6 and the furnace body 4 are used in one piece to save space.

[0037] Specifically, the lifting drive machine 1 is driven to rotate so that the driving gear 11 rotates and drives the chain belt to rotate. Figure 1 The left sprocket 12 in the middle rotates, causing the first chain 10 and the second chain 14 to move. The movement of the first chain 10 and the second chain 14 causes the other two sprockets 12 to rotate. The movement of the first chain 10 and the second chain 14 pulls the air nozzle 2 up and down, making it convenient for the staff to inspect the air nozzle 2 on the inspection platform 6. The forward rotation of the lifting drive 1 causes the air nozzle 2 to move up, and the reverse rotation of the lifting drive 1 causes the air nozzle 2 to move down.

[0038] Since the right air nozzle piece 2 is located on the right side of the brick wall and fits against the brick wall, the air nozzle piece 2 fits against the inner wall between the first support column 9 and the second support column 15, so that the air nozzle piece 2 will not swing during the up and down movement.

[0039] As long as the air nozzle assembly 2 on the left side of the furnace body 4 is damaged, the air nozzle assembly 2 can be sent to the right side of the furnace body 4 for maintenance. The air nozzle assembly 2 on the right side of the furnace body 4 serves as a spare for the air nozzle assembly 2 on the left side of the furnace body 4, which is convenient for replacing and repairing the air nozzle assembly 2 in a smaller space.

[0040] The temperature inside the furnace body 4 is kept constant through auxiliary heating of the air nozzle piece 2 . When the furnace body 4 needs to discharge heat, the air nozzle piece 2 can discharge the heat inside the furnace body 4 .

[0041] Example 3

[0042] The upper side of the furnace body 4 is provided with an inspection platform 6, the lower side of the inspection platform 6 is provided with a bottom plate 3, and the lower side of the bottom plate 3 is provided with the insulation board, so that the temperature in the furnace body 4 will not be transmitted to the bottom plate 3 to avoid scalding the feet of the staff.

[0043] Example 4

[0044] A material pier 8 is built on the upper side of the brick wall on the lower side of the furnace body 4, and the material pier 8 supports the heat-resistant steel material rack 7. An insulating plate is provided between the material pier 8 and the heat-resistant steel material rack 7 to prevent the temperature of the product placed on the heat-resistant steel material rack 7 from being transmitted to the brick wall on the lower side of the furnace body 4 through the material pier 8.

[0045] The material of the above-mentioned heat insulation board is ceramic fiber, which can provide good heat insulation and has a certain supporting strength. Within the supporting strength range, the heat insulation board will not fold or deform.

[0046] The embodiments of the present invention disclose preferred embodiments, but are not limited thereto. A person skilled in the art can easily understand the spirit of the present invention based on the above embodiments and make different extensions and changes. However, as long as they do not deviate from the spirit of the present invention, they are all within the protection scope of the present invention.

Claims

1. A high-temperature box-type resistance furnace without a heater at the furnace bottom, comprising a furnace body (4), the interior of the furnace body (4) being sealed by a structural member, characterized in that: The left and right sides of the furnace body (4) are provided with air nozzles (2); the upper side of the furnace body (4) is sealed by a heat insulation board; the air nozzle (2) on the left side seals the furnace body (4); the right side of the furnace body (4) is sealed by a brick wall; the lower side of the furnace body (4) is sealed by a brick wall; the lower side of the brick wall on the lower side of the furnace body (4) is attached with a heat insulation board; the furnace wall inside the furnace body (4) is provided with a resistance heating wire (5); the resistance heating wire (5) is wound into a corrugated shape and is installed on a porcelain nail hanger on the furnace wall; The furnace body (4) has an inspection platform (6) on its upper side, the inspection platform (6) has a bottom plate (3) on its lower side, and the bottom plate (3) has the heat insulation board on its lower side; The right side of the furnace body (4) is provided with a first support column (9) and a second support column (15), the furnace body (4) is located between the first support column (9) and the second support column (15), and a lifting drive machine (1) is fixed on the upper side of the first support column (9); The upper sides of the first support column (9) and the second support column (15) are provided with a crossbeam (13), and the upper sides of the crossbeam (13) are provided with a plurality of rotating sprockets (12), and the sprockets (12) are meshedly connected with the driving gears (11) of the lifting drive machine (1) through a closed chain belt; The sprocket (12) is meshedly connected with the first chain (10) and the second chain (14) on the upper side of the sprocket (12), and the lower sides of the first chain (10) and the second chain (14) are fixedly connected with the air nozzle piece (2) on the right side; The air nozzle piece (2) is provided between the first support column (9) and the second support column (15), and the air nozzle piece (2) is attached to the inner wall between the first support column (9) and the second support column (15); The right air nozzle piece (2) is located on the right side of the brick wall and is attached to the brick wall; A material pier (8) is built on the upper side of the brick wall at the lower side of the furnace body (4), and the material pier (8) is made of prefabricated steel fiber brick material, and a heat-resistant steel material rack (7) is placed on the material pier (8); A heat insulation board is provided between the material pile (8) and the heat-resistant steel material rack (7).

2. The high temperature box-type resistance furnace without a heater at the bottom of the furnace according to claim 1, characterized in that: All insulation panels are made of ceramic fiber.

Images