Vacuum quenching furnace insulation layer maintenance tool

Abstract

The utility model belongs to the technical field of industrial heat treatment equipment relates to a vacuum quenching furnace heat preservation layer maintenance frock, including one side hinged furnace door's furnace shell, the furnace shell and furnace door seal form a vacuum system, be provided with a modularization hot area unit that can integrally move in the furnace shell, the modularization hot area unit includes rigid openwork box, set up in the heat preservation layer of box inner wall, and heating element in the box, be provided with horizontal in -furnace rail in the furnace shell, the bottom of box is provided with the gyro wheel of being suitable for in -furnace rail, the furnace shell is provided with the maintenance dolly outside, the top surface of maintenance dolly forms maintenance platform, be provided with maintenance rail on maintenance platform, when the furnace door is in the open state, maintenance rail can be connected with in -furnace rail, form the continuous rail for the modularization hot area unit removal or removal furnace shell. The utility model provides vacuum quenching furnace heat preservation layer maintenance frock, has improved the convenience and efficiency of repair.

Description

Technical Field

[0001] This utility model belongs to the technical field of industrial heat treatment equipment, and relates to a maintenance fixture for the insulation layer of a vacuum quenching furnace. Background Technology

[0002] Vacuum quenching furnaces are suitable for solution treatment and aging treatment of large and medium-sized vacuum product parts. One of its core components is the insulation layer inside the furnace chamber, which is usually made of materials such as carbon fiber felt or graphite felt to reduce heat loss and improve thermal efficiency.

[0003] During long-term use of a vacuum quenching furnace, the insulation layer is severely eroded by the cooling gas, causing some carbon fiber material to fall off or break, thus significantly reducing the equipment's insulation performance. Timely maintenance of the insulation material is crucial for energy conservation. However, the insulation layer of a traditional vacuum quenching furnace is directly fixed to the inner wall of the furnace shell. Its structure cannot bear weight, and the confined space inside the furnace makes maintenance extremely inconvenient, time-consuming, and labor-intensive. Currently, the solution disclosed in Chinese invention patent application CN109531044A (publication date: March 29, 2019) provides a repair tool and process. While this avoids complete disassembly, it still requires maintenance personnel to enter the furnace chamber or perform in-situ stitching repairs in a confined space, resulting in high labor intensity, harsh environment, and difficulty in guaranteeing repair quality. Utility Model Content

[0004] This utility model addresses the shortcomings of existing technologies by providing a maintenance fixture for the insulation layer of a vacuum quenching furnace. It enables the insulation layer and its related components to be moved out of the furnace as a whole module for maintenance, thereby greatly improving the convenience and efficiency of maintenance.

[0005] To solve the above-mentioned technical problems, the objective of this utility model is achieved through the following technical solution: A maintenance fixture for the insulation layer of a vacuum quenching furnace includes a furnace shell with a furnace door hinged to one side. The furnace shell and furnace door are sealed to form a vacuum system. A modular hot zone unit that can be moved as a whole is arranged inside the furnace shell. The modular hot zone unit includes a rigid hollow box, an insulation layer set on the inner wall of the box, and a heating element inside the box. A horizontal furnace track is arranged inside the furnace shell, and the bottom of the box is provided with rollers adapted to the furnace track. A maintenance trolley is arranged outside the furnace shell. The top surface of the maintenance trolley forms a maintenance platform. A maintenance track is arranged on the maintenance platform. When the furnace door is in the open state, the maintenance track can be connected with the furnace track to form a continuous track for the modular hot zone unit to move into or out of the furnace shell.

[0006] In the above-mentioned maintenance fixture for the insulation layer of a vacuum quenching furnace, the box body is a box-type structure made of steel plate, the insulation layer is installed close to its inner wall, and the steel plate is provided with perforations to form channels for balancing air pressure; the box body can also be a structure with a metal frame and metal panels between the frames.

[0007] In the above-mentioned maintenance fixture for the insulation layer of a vacuum quenching furnace, the power lead of the heating element is connected to an electrical plug located on the outside of the housing, and an electrical socket matching the electrical plug is fixedly installed on the inner wall of the furnace shell.

[0008] In the above-mentioned maintenance fixture for the insulation layer of a vacuum quenching furnace, the furnace tracks are arranged in pairs and symmetrically distributed about the center of the furnace chamber; the rollers are evenly distributed on the two furnace tracks and at least four are provided; furthermore, a detachable limiting block is provided at one end of the furnace track near the furnace door.

[0009] In the above-mentioned maintenance fixture for the insulation layer of a vacuum quenching furnace, the bottom of the maintenance trolley is equipped with casters with braking function.

[0010] In the above-mentioned maintenance fixture for the insulation layer of a vacuum quenching furnace, the maintenance track is provided with a stop slot into which a stop pin can be inserted; the stop pin cuts off the maintenance track to stop the rollers.

[0011] In the above-mentioned maintenance fixture for the insulation layer of a vacuum quenching furnace, at least one traction auxiliary structure is provided on the side of the box. The traction auxiliary structure is adapted to an external traction tool and is selected from a pull ring, a hook, or a traction hole.

[0012] Compared with the prior art, this utility model has the following advantages: This invention provides a maintenance fixture for the insulation layer of a vacuum quenching furnace. By integrating the insulation layer, heating elements, and other components into a movable modular hot zone unit, and utilizing a track and trolley system, it enables rapid, comprehensive external maintenance of this unit. This completely eliminates the need for maintenance personnel to enter the confined and harsh furnace environment, significantly reducing labor intensity and safety risks. The spacious maintenance trolley outside the furnace allows for more thorough and precise repairs or replacements of the modular hot zone unit, significantly improving maintenance quality. Simultaneously, the modular design allows for the preparation of spare units, greatly reducing equipment downtime during maintenance and improving equipment utilization and production efficiency. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model; Attached reference numerals: 1. Furnace door; 2. Furnace shell; 3. Box body; 4. Insulation layer; 5. Heating element; 6. Furnace internal track; 7. Roller; 8. Maintenance trolley; 9. Maintenance platform; 10. Maintenance track; 11. Casters; 12. Traction auxiliary structure. Detailed Implementation

[0014] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. See also: Figure 1 : A maintenance fixture for the insulation layer of a vacuum quenching furnace includes a furnace shell 2 with a furnace door 1 hinged to one side. The furnace shell 2 and the furnace door 1 are sealed to form a vacuum system. A modular hot zone unit that can be moved as a whole is provided inside the furnace shell 2. The modular hot zone unit includes a rigid hollow box 3, an insulation layer 4 set on the inner wall of the box 3, and a heating element 5 inside the box 3. A horizontal furnace track 6 is provided inside the furnace shell 2. Rollers 7 adapted to the furnace track 6 are provided at the bottom of the box 3. A maintenance trolley 8 is provided outside the furnace shell 2. The top surface of the maintenance trolley 8 forms a maintenance platform 9. A maintenance track 10 is provided on the maintenance platform 9. When the furnace door 1 is in the open state, the maintenance track 10 can be connected with the furnace track 6 to form a continuous track for the modular hot zone unit to move into or out of the furnace shell 2.

[0015] The working process of this embodiment is as follows: The modular hot zone unit is pushed into its working position inside the furnace shell 2. Electrical components are connected (the power lead of the heating element 5 is connected to an electrical plug located on the outside of the housing 3, and an electrical socket matching the electrical plug is fixedly installed on the inner wall of the furnace shell 2). The furnace door 1 is closed. The vacuum system is activated to extract air from the furnace shell 2 until the required vacuum level is reached. Utilizing the perforated and dense porous insulation layer 4 on the housing 3, the inner cavity of the furnace shell 2 and the inner cavity of the housing 3 are simultaneously evacuated, ensuring a uniform vacuum environment throughout the furnace. Maintaining the vacuum environment, the heating element 5 inside the housing 3 is activated to heat the workpiece to the austenitizing temperature of the corresponding material (e.g., 1000~1200℃ for tool and die steel), and the workpiece is held at this temperature for a certain period to ensure uniform heating. After heating and holding, high-pressure cooling gas is rapidly injected into the furnace shell 2, while forced gas circulation is performed to cool the workpiece, completing the quenching process.

[0016] The maintenance process in this embodiment is as follows: the equipment is stopped and restored to normal pressure. The furnace door 1 is opened and the electrical plug is unplugged to separate it from the electrical socket. The maintenance trolley 8 is pushed to the front of the furnace door 1 and its position is adjusted so that the maintenance track 10 on its top is precisely connected to the furnace track 6 inside the furnace. The entire modular hot zone unit is slowly pulled out and smoothly transferred to the maintenance trolley 8 through the connected track. The insulation layer 4, heating element 5, etc. can then be fully and comfortably repaired or replaced. After the maintenance is completed, the modular hot zone unit is sent back into the furnace shell 2 in the reverse order. The electrical plug is plugged in and the furnace door 1 is closed to prepare for the next production.

[0017] In this embodiment, the box body 3 is a box-type structure made of steel plate, and the insulation layer 4 is installed close to its inner wall. The steel plate is provided with hollowed-out holes to form channels for balancing air pressure. The box body 3 can also be a structure with a metal frame and metal panels between the frames.

[0018] Preferably, the furnace tracks 6 are arranged in pairs and symmetrically distributed about the center of the furnace chamber; the rollers 7 are evenly distributed on the two furnace tracks 6 and at least four are provided; furthermore, a detachable limiting block is provided at one end of the furnace track 6 near the furnace door 1 to keep the box 3 stable inside the furnace shell 2, and the limiting block can be removed when maintenance is required.

[0019] Preferably, the bottom of the maintenance trolley 8 is equipped with universal wheels 11 with braking function, so that the maintenance trolley 8 is moved to the maintenance station only when maintenance is required.

[0020] To maintain the stability of the housing 3 during maintenance, the maintenance track 10 is provided with a stop slot into which a stop pin can be inserted; the stop pin cuts off the maintenance track 10 to stop the roller 7.

[0021] To facilitate the pulling out of the housing 3, at least one traction auxiliary structure 12 is provided on the side of the housing 3. The traction auxiliary structure 12 is adapted to an external traction tool. The traction auxiliary structure 12 is selected from a pull ring, hook or traction hole. During maintenance, the entire modular hot zone unit is slowly pulled out by using an external traction tool (or manually) through the traction auxiliary structure 12.

[0022] The above embodiments are merely preferred embodiments of the present utility model and are not intended to limit the scope of protection of the present utility model. Therefore, all equivalent changes made to the structure, shape, and principle of the present utility model should be covered within the scope of protection of the present utility model.

Claims

1. A maintenance fixture for the insulation layer of a vacuum quenching furnace, comprising a furnace shell (2) with a furnace door (1) hinged to one side, wherein the furnace shell (2) and the furnace door (1) are sealed to form a vacuum system, characterized in that, The furnace shell (2) is equipped with a modular hot zone unit that can be moved as a whole. The modular hot zone unit includes a rigid hollow box (3), an insulation layer (4) set on the inner wall of the box (3), and a heating element (5) inside the box (3). The furnace shell (2) is equipped with a horizontal furnace track (6). The bottom of the box (3) is equipped with rollers (7) that are compatible with the furnace track (6). The furnace shell (2) is equipped with a maintenance trolley (8). The top surface of the maintenance trolley (8) forms a maintenance platform (9). The maintenance platform (9) is equipped with a maintenance track (10). When the furnace door (1) is in the open state, the maintenance track (10) can be connected with the furnace track (6) to form a continuous track for the modular hot zone unit to move into or out of the furnace shell (2).

2. The fixture for maintaining the insulation layer of a vacuum quenching furnace according to claim 1, characterized in that, The box body (3) is a box-type structure made of steel plate, and the insulation layer (4) is installed close to its inner wall. The steel plate is provided with hollowed-out channels to form a balance of air pressure.

3. The maintenance fixture for the insulation layer of a vacuum quenching furnace according to claim 1, characterized in that, The power lead of the heating element (5) is connected to an electrical plug located on the outside of the housing (3), and an electrical socket matching the electrical plug is fixedly installed on the inner wall of the furnace shell (2).

4. The maintenance fixture for the insulation layer of a vacuum quenching furnace according to claim 1, characterized in that, The furnace tracks (6) are arranged in pairs and symmetrically distributed about the center of the furnace; the rollers (7) are evenly distributed on the two furnace tracks (6) and there are at least four of them.

5. The maintenance fixture for the insulation layer of a vacuum quenching furnace according to claim 1, characterized in that, The bottom of the maintenance trolley (8) is equipped with universal wheels (11) with braking function.

6. The maintenance fixture for the insulation layer of a vacuum quenching furnace according to claim 1, characterized in that, The maintenance rail (10) is provided with a stop slot into which a stop pin can be inserted.

7. The maintenance fixture for the insulation layer of a vacuum quenching furnace according to claim 1, characterized in that, The side of the box (3) is provided with at least one traction auxiliary structure (12), which is adapted to an external traction tool. The traction auxiliary structure (12) is selected from a pull ring, a hook or a traction hole.

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