Closed-loop heating device of atmosphere furnace

Abstract

The utility model discloses a closed-loop heating device of an atmosphere furnace, which belongs to the technical field of atmosphere furnace heating and is characterized by comprising a base flange, a base shielding layer assembly, a ceramic base plate, a lower base plate electrode assembly, an upper base plate electrode assembly and a molybdenum heating plate, after electrification, current is transmitted to the electrode bar through the electrode lead-out plate, conducted to the copper connecting plate through the electrode bar, then transmitted to the heating belt connecting block through the connecting plate bottom flange and further transmitted to the molybdenum heating disc to achieve heating, the lower base plate electrode assemblies and the upper base plate electrode assemblies are arranged on the two sides, and closed-loop heating is achieved. By the adoption of the technical scheme, the needed high-temperature heating effect can be achieved, and disassembly, assembly, operation and use are convenient.

Description

Technical Field

[0001] This application belongs to the field of atmosphere furnace heating technology, specifically relating to a closed-loop heating device for an atmosphere furnace. Background Art

[0002] An atmosphere furnace is characterized by introducing an artificially prepared atmosphere of a specific composition into the furnace at a predetermined temperature to achieve a specific heat treatment purpose, such as gas carburizing, carbonitriding, bright quenching, annealing, and normalizing. Atmosphere furnaces are generally divided into two types: tube furnaces and box furnaces. Tube furnaces (e.g., CN105890351A) use quartz or corundum tubes as furnace tubes, while box furnaces (e.g., CN107504811A) have a welded, integral box structure. Atmosphere furnaces are widely used in preliminary experiments in laboratories, industrial and mining enterprises, and research institutions. Different types of heating elements can be used depending on the specific atmosphere and temperature requirements.

[0003] However, when heating elements are actually used to heat the interior of an atmosphere furnace, the heating temperature is affected by various factors of the components themselves, making it difficult to reach the required high temperature. The whole system cannot achieve closed-loop heating and is inconvenient to disassemble and operate. Therefore, we propose a closed-loop heating device for an atmosphere furnace. Utility Model Content

[0004] The purpose of this application is to provide a closed-loop heating device for an atmosphere furnace, in order to solve the problems mentioned in the background art, where the heating temperature is affected by various factors of the components themselves when heating elements are used to heat the interior of the atmosphere furnace, making it difficult to reach the required high temperature, and the whole system cannot achieve closed-loop heating, making it inconvenient to disassemble and operate.

[0005] To achieve the above objectives, this application provides the following technical solution: a closed-loop heating device for an atmosphere furnace, comprising a base flange, on which two lower base plate electrode assemblies are disposed, and at the top of the lower base plate electrode assemblies are upper base plate electrode assemblies, both of which are detachably connected to a ceramic pad, and a molybdenum heating plate is detachably mounted on the ceramic pad.

[0006] In a preferred embodiment, a base shielding layer assembly is fixed to the upper surface of the base flange, and the ceramic pad is disposed on the upper part of the base shielding layer assembly (the upper chassis electrode assembly passes through the base shielding layer assembly).

[0007] In a preferred embodiment, the lower base electrode assembly includes a flange cover mounted on a base flange, an electrode rod mounted on the flange cover, a water-cooling head welded to the bottom end of the electrode rod, and an electrode lead-out plate fixedly mounted on the outer surface of the electrode rod.

[0008] Furthermore, the upper chassis electrode assembly includes a copper connecting plate. One end of the copper connecting plate is threadedly connected to the top of the electrode rod via an assembly nut. Two connecting plate bottom flanges are provided above the copper connecting plate. A heating band connecting block is provided above the connecting plate bottom flanges. Two molybdenum screws are inserted between the connecting plate bottom flanges and the copper connecting plate, and between the connecting plate bottom flanges and the heating band connecting block. Two molybdenum nuts are threaded onto the outer surface of the two molybdenum screws. The two molybdenum nuts are fitted and arranged on one side of one of the connecting plate bottom flanges. A gasket bottom flange is provided between the two connecting plate bottom flanges. A heating band pressure plate is provided on the heating band connecting block and is connected to the ceramic gasket through the heating band pressure plate.

[0009] Using the above scheme, through the base flange, ceramic pad, lower base electrode assembly and upper base electrode assembly, after power is applied, the current is transmitted to the electrode rod through the electrode lead plate, then conducted to the copper connecting plate through the electrode rod, and then transmitted to the heating belt connecting block through the bottom flange of the connecting plate, and then transmitted to the molybdenum heating plate to achieve heating. The lower base electrode assembly and upper base electrode assembly are set on both sides to achieve closed-loop heating, which can achieve the required high temperature heating effect and is easy to disassemble and use.

[0010] In a preferred embodiment, a PTFE gasket is attached to the surface of the flange cover, and the upper surface of the PTFE gasket is attached to the lower surface of the base flange.

[0011] By adopting the above solution and setting up a PTFE gasket, the excellent insulation properties of the PTFE gasket can effectively prevent current from being conducted into the furnace body through the base flange.

[0012] In a preferred embodiment, a PTFE insulating sleeve is provided at the welding position between the flange cover and the base flange.

[0013] Using the above solution, the PTFE insulating sleeve has the same effect as the PTFE gasket, and the combination of the two achieves a double insulation effect.

[0014] In a preferred embodiment, a ceramic pad is attached to the lower surface of the copper connecting plate, and a plurality of molybdenum screws are inserted between the ceramic pad and the copper connecting plate. A molybdenum nut is threaded onto the outer surface of the molybdenum screw, and the molybdenum nut is attached to the upper surface of the copper connecting plate.

[0015] By using the above solution, the ceramic pad and the copper connecting plate can be assembled together using molybdenum screws and molybdenum nuts. This allows the copper connecting plate to be supported and isolated from the base flange, providing both support and insulation.

[0016] In a preferred embodiment, molybdenum rivets are inserted between the bottom flange of the gasket plate and the bottom flange of the connecting plate.

[0017] Using the above scheme, the molybdenum rivets can effectively connect the bottom flange of the connecting plate and the bottom flange of the gasket plate. The connection structure is simple and the operation and disassembly are convenient.

[0018] In a preferred embodiment, the outer part of the nut assembled on the copper connecting plate is fitted with a ceramic insulating cap.

[0019] By adopting the above scheme, the use of ceramic insulating caps can prevent the generated end arc from being conducted to the furnace body.

[0020] In a preferred embodiment, a second ceramic pad is detachably mounted on the ceramic pad plate, and the second ceramic pad is pressed against the upper surface of the molybdenum heating plate.

[0021] Using the above scheme, the ceramic pad can be used to easily assemble and press the molybdenum heating plate.

[0022] In a preferred embodiment, ceramic insulating sleeves are installed on the outside of the bottom flange of the connecting plate and the bottom flange of the gasket plate.

[0023] By adopting the above solution, the ceramic insulating sleeve can provide an insulation effect between the ceramic sleeve and the base shielding layer assembly.

[0024] Compared with the prior art, the beneficial effects of this application are:

[0025] The closed-loop heating device of this atmosphere furnace is equipped with a base flange, a ceramic pad, a lower base electrode assembly, and an upper base electrode assembly. After being powered on, the current is transmitted to the electrode rod through the electrode lead plate, then to the copper connecting plate through the electrode rod, and then to the heating belt connecting block through the bottom flange of the connecting plate, and finally to the molybdenum heating plate to achieve heating. The lower base electrode assembly and the upper base electrode assembly are set on both sides to achieve closed-loop heating and achieve the required high-temperature heating effect. Attached Figure Description

[0026] Figure 1 This is a three-dimensional schematic diagram of the closed-loop heating device of this application.

[0027] Figure 2 This is a schematic diagram of the chassis electrode assembly structure in this application.

[0028] Figure 3 This is a schematic diagram of the structure of the chassis electrode assembly in this application.

[0029] Figure 4 This is a schematic diagram of the structure of the chassis electrode assembly and ceramic pad in this application.

[0030] Figure 5 This is a top view of the closed-loop heating device of this application.

[0031] Figure 6 This is a three-dimensional schematic diagram of the closed-loop heating device of this application from another perspective.

[0032] Figure 7 The three-dimensional schematic diagram of the base shielding layer assembly of the closed-loop heating device of this application is not shown.

[0033] In the diagram: 1. Base flange; 2. Base shielding layer assembly; 3. Ceramic pad; 4. Lower chassis electrode assembly; 5. Upper chassis electrode assembly; 6. Ceramic insulating sleeve; 7. Flange cover; 8. Electrode lead-out plate; 9. PTFE gasket; 10. Electrode rod; 11. Assembly nut; 12. PTFE insulating sleeve; 13. Water cooling head welding; 14. Copper connecting plate; 15. Ceramic pad one; 16. Molybdenum screw one; 17. Molybdenum nut one; 18. Molybdenum nut two; 19. Molybdenum screw two; 20. Connecting plate bottom flange; 21. Pad bottom flange; 22. Molybdenum rivet; 23. Heating belt connecting block; 24. Heating belt pressing plate; 25. Ceramic pad two; 26. Molybdenum heating plate; 27. Ceramic insulating cap. DETAILED DESCRIPTION

[0034] To make the objectives, technical solutions, and advantages of this application clearer, the application will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be understood that these descriptions are merely exemplary and not intended to limit the scope of this application. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concepts of this application.

[0035] Please see Figure 1-6 This application provides a closed-loop heating device for an atmosphere furnace, comprising: a base flange 1, a base shielding layer assembly 2, a ceramic pad 3, a lower base electrode assembly 4, and an upper base electrode assembly 5;

[0036] The base flange 1 is provided with two lower base plate electrode assemblies 4; the top of the lower base plate electrode assembly 4 passes through the base flange 1 and an upper base plate electrode assembly 5 is provided at the top of the lower base plate electrode assembly 4; both upper base plate electrode assemblies 5 are detachably connected to the ceramic pad 3; a molybdenum heating plate 26 is detachably installed on the ceramic pad 3; the molybdenum heating plate adopts an irregular shape structure, which is to control the heating temperature by controlling the resistance.

[0037] The base flange 1 has a base shielding layer assembly 2 welded to its upper surface; the ceramic pad 3 is disposed on the upper part of the base shielding layer assembly 2 (the base shielding layer assembly 2 is used for heat insulation).

[0038] like Figure 2 and Figure 6As shown, the lower base electrode assembly 4 includes: a flange cover 7 installed on the base flange 1, an electrode rod 10 installed on the flange cover 7, a water cooling head welding 13 fixedly installed at the bottom end of the electrode rod 10, and an electrode lead-out plate 8 fixedly installed on the outer surface of the electrode rod 10.

[0039] like Figure 3 As shown, the upper chassis electrode assembly 5 includes: a copper connecting plate 14, one end of which is threadedly connected to the top of the electrode rod 10 via an assembly nut 11; two connecting plate bottom flanges 20 are provided above the copper connecting plate 14; a heating band connecting block 23 is provided above the connecting plate bottom flanges 20; molybdenum screws 19 are threaded between the connecting plate bottom flanges 20 and the copper connecting plate 14, and between the connecting plate bottom flanges 20 and the heating band connecting block 23; molybdenum nuts 18 are threaded onto the outer surface of the molybdenum screws 19; the molybdenum nuts 18 are fitted and arranged on one side of one of the connecting plate bottom flanges 20; a gasket bottom flange 21 is provided between the two connecting plate bottom flanges 20; a heating band pressure plate 24 is provided on the heating band connecting block 23 and is connected to the ceramic gasket 3 via the heating band pressure plate 24.

[0040] like Figure 7 As shown, by setting up a base flange 1, a ceramic pad 3, a lower base electrode assembly, and an upper base electrode assembly, after power is applied, the current is transmitted through the electrode lead plate 8 to the electrode rod 10, then conducted through the electrode rod 10 to the copper connecting plate 14, and then transmitted through the bottom flange 20 of the connecting plate to the heating belt connecting block 23, and then to the molybdenum heating plate 26 to achieve heating. The lower base electrode assembly 4 and the upper base electrode assembly 5 are set on both sides to achieve closed-loop heating, which can achieve the required high-temperature heating effect and is easy to disassemble and use.

[0041] The flange cover 7 is fitted with a PTFE gasket 9. The upper surface of the PTFE gasket 9 is fitted with the lower surface of the base flange 1. By setting the PTFE gasket 9, the good insulation properties of the PTFE gasket 9 can effectively prevent current from being conducted through the base flange 1 into the furnace body.

[0042] The welding position between the flange cover 7 and the base flange 1 is covered with a PTFE insulating sleeve 12. The PTFE insulating sleeve 12 has the same function as the PTFE gasket 9, and the two together provide double insulation.

[0043] A ceramic pad 15 is attached to the lower surface of the copper connecting plate 14. Several molybdenum screws 16 are inserted between the ceramic pad 15 and the copper connecting plate 14. Molybdenum nuts 17 are threaded onto the outer surface of the molybdenum screws 16 and are attached to the upper surface of the copper connecting plate 14. By using the molybdenum screws 16 and molybdenum nuts 17 together, the ceramic pad 15 and the copper connecting plate 14 can be assembled, thereby supporting and isolating the copper connecting plate 14 from the base flange 1. This not only provides support but also insulation.

[0044] Molybdenum rivets 22 are inserted between the bottom flange 21 of the pad plate and the bottom flange 20 of the connecting plate. The molybdenum rivets 22 enable effective splicing between the bottom flange 20 of the connecting plate and the bottom flange 21 of the pad plate. The splicing structure is simple and easy to operate and disassemble.

[0045] A ceramic insulating cap 27 is fitted on the outside of the nut 11 assembled on the copper connecting plate 14. The ceramic insulating cap 27 can prevent the generated end arc from being conducted to the furnace body.

[0046] A ceramic pad 25 is detachably installed on the ceramic pad 3. The ceramic pad 25 is pressed onto the upper surface of the molybdenum heating plate 26. The ceramic pad 25 allows for convenient assembly and clamping of the molybdenum heating plate 26.

[0047] Ceramic insulating sleeves 6 are installed on the outside of the bottom flange 20 of the connecting plate and the bottom flange 21 of the pad plate. The ceramic insulating sleeves 6 can provide an isolation and insulation effect between the ceramic insulating sleeves 6 and the base shielding layer assembly 2.

[0048] In use, by setting up a base flange 1, a ceramic pad 3, a lower base electrode assembly, and an upper base electrode assembly, after power is applied, the current is transmitted through the electrode lead plate 8 to the electrode rod 10, and then conducted through the electrode rod 10 to the copper connecting plate 14. It is then transmitted through the bottom flange 20 of the connecting plate to the heating belt connecting block 23, and then to the molybdenum heating plate 26 to achieve heating. Both sides are provided with a lower base electrode assembly 4 and an upper base electrode assembly 5 to achieve closed-loop heating and achieve the required high-temperature heating effect.

[0049] The above-described embodiments are preferred embodiments of the present utility model and are only used to facilitate the illustration of the present utility model. They are not intended to limit the present utility model in any way. Any person skilled in the art who makes partial modifications or alterations to the technical content disclosed in the present utility model without departing from the scope of the technical features of the present utility model shall still fall within the scope of the technical features of the present utility model.

Claims

1. A closed-loop heating device for an atmosphere furnace, characterized in that: include: Base flange (1), base shielding layer assembly (2), ceramic pad (3), lower chassis electrode assembly (4), upper chassis electrode assembly (5), molybdenum heating plate (26); The lower surface of the base flange (1) is provided with two lower base plate electrode assemblies (4), the top of the lower base plate electrode assembly (4) passes through the base flange (1) and an upper base plate electrode assembly (5) is provided at the top of the lower base plate electrode assembly (4); a ceramic pad (3) is connected to the top of the two upper base plate electrode assemblies (5), and a molybdenum heating plate (26) is installed on the ceramic pad (3); Among them, the base flange (1) is fixedly provided with a base shielding layer assembly (2) on its upper surface; The ceramic pad (3) is located on the upper part of the base shielding layer assembly (2).

2. The closed-loop heating device for an atmosphere furnace according to claim 1, characterized in that: The lower chassis electrode assembly includes a flange cover (7) installed on the base flange (1), an electrode rod (10) is installed on the flange cover (7), a water cooling head welding (13) is fixedly installed at the bottom end of the electrode rod (10), and an electrode lead-out plate (8) is fixedly installed on the outer surface of the electrode rod (10). The upper chassis electrode assembly (5) includes a copper connecting plate (14). One end of the copper connecting plate (14) is threadedly connected to the top of the electrode rod (10) through an assembly nut (11). Two connecting plate bottom flanges (20) are provided above the copper connecting plate (14). A heating band connecting block (23) is provided above the connecting plate bottom flanges (20). Molybdenum screws (19) are inserted between the connecting plate bottom flanges (20) and the copper connecting plate (14) and between the connecting plate bottom flanges (20) and the heating band connecting block (23). Molybdenum nuts (18) are threaded on the outer surface of the molybdenum screws (19). The molybdenum nuts (18) are attached to one side of one of the connecting plate bottom flanges (20). A pad bottom flange (21) is provided between the two connecting plate bottom flanges (20). A heating band pressure plate (24) is provided on the heating band connecting block (23) and is connected to the ceramic pad (3) through the heating band pressure plate (24).

3. The closed-loop heating device for an atmosphere furnace according to claim 2, characterized in that: The flange cover (7) is fitted with a PTFE gasket (9), and the upper surface of the PTFE gasket (9) is fitted with the lower surface of the base flange (1).

4. The closed-loop heating device for an atmosphere furnace according to claim 3, characterized in that: The flange cover (7) and the base flange (1) are externally covered with a PTFE insulating sleeve (12) at the welding position.

5. The closed-loop heating device for an atmosphere furnace according to claim 4, characterized in that: A ceramic pad (15) is attached to the lower surface of the copper connecting plate (14). A plurality of molybdenum screws (16) are inserted between the ceramic pad (15) and the copper connecting plate (14). A molybdenum nut (17) is threaded onto the outer surface of the molybdenum screw (16). The molybdenum nut (17) is attached to the upper surface of the copper connecting plate (14).

6. The closed-loop heating device for an atmosphere furnace according to claim 5, characterized in that: A molybdenum rivet (22) is inserted between the bottom flange (21) of the pad plate and the bottom flange (20) of the connecting plate.

7. The closed-loop heating device for an atmosphere furnace according to claim 6, characterized in that: A ceramic insulating cap (27) is attached to the outside of the nut (11) assembled on the copper connecting plate (14).

8. The closed-loop heating device for an atmosphere furnace according to claim 7, characterized in that: A ceramic pad two (25) is detachably installed on the ceramic pad plate (3), and the ceramic pad two (25) is pressed on the upper surface of the molybdenum heating plate (26).

9. The closed-loop heating device for an atmosphere furnace according to claim 8, characterized in that: The bottom flange (20) of the connecting plate and the bottom flange of the gasket plate are equipped with ceramic insulating sleeves (6).

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