Pneumatic automatic door sealing device of carbon quenching multipurpose furnace and door sealing method of pneumatic automatic door sealing device

Abstract

The invention belongs to the technical field of carbon quenching multi-purpose furnaces, and discloses a pneumatic automatic door sealing device for a carbon quenching multi-purpose furnace and a door sealing method thereof.The pneumatic automatic door sealing device comprises a furnace body, a furnace door is installed on one side of the furnace body, two sliding seats are fixedly installed on the side wall of the furnace door, and the two sliding seats are both installed in the furnace body in a sliding mode; sliding assemblies are installed in the two sliding seats, each sliding assembly comprises sliding wheels installed in the corresponding sliding seat, the sliding wheels are evenly installed on the top and the bottom of the corresponding sliding seat, each sliding wheel is rotationally installed in the corresponding sliding seat through a rotating shaft, and a lubricating assembly is arranged in the corresponding sliding seat. The air cylinder drives the output end to enable the sliding base to push the furnace door outwards, friction between the furnace door and other parts in the opening process is remarkably reduced through the pulleys, the furnace door moves more smoothly, smooth opening and closing of the furnace door are guaranteed, and the service life of the furnace door is prolonged.

Description

Technical Field

[0001] The invention belongs to the technical field of carbon quenching multi-purpose furnaces, and specifically relates to a pneumatic automatic door sealing device and a door sealing method for a carbon quenching multi-purpose furnace. Background Art

[0002] The pneumatic automatic door sealing device is a mechanical device that uses a pneumatic system to realize automatic opening and closing of the door. The device is widely used in many fields such as industry, commerce and public facilities, especially in the application of carbon quenching multi-purpose furnaces, where its performance is particularly outstanding. Driven by the pneumatic system, the door sealing device can efficiently and accurately complete the opening and closing of the door, significantly improving production efficiency and safety. At the same time, thanks to its automation characteristics, it reduces the complexity and potential errors of manual operation and ensures the stability and reliability of the operation process. Therefore, the pneumatic automatic door sealing device plays a key role in various industrial production processes, especially in carbon quenching multi-purpose furnaces that require frequent opening and closing of the furnace door, it has become an indispensable component;

[0003] However, pneumatic doors will encounter greater friction during the opening and closing process, which not only increases the opening and closing resistance of the door, but may also cause wear and damage to the door leaf, thereby affecting the service life and user experience of the door. Summary of the invention

[0004] The object of the present invention is to provide a pneumatic automatic door sealing device and a door sealing method for a carbon quenching multi-purpose furnace, so as to solve the problems raised in the above-mentioned background technology.

[0005] In order to achieve the above-mentioned object, the present invention provides the following technical solutions: a pneumatic automatic door sealing device for a carbon quenching multi-purpose furnace, comprising a furnace body, a furnace door is installed on one side of the furnace body, a sliding seat is fixedly installed on the side wall of the furnace door, two sliding seats are provided, both of the two sliding seats are slidably installed inside the furnace body, and sliding components are installed inside the two sliding seats, one side of one of the sliding seats is connected to an output end, the output end is installed at one end of a cylinder, and the cylinder is installed on the side wall of the furnace body;

[0006] Wherein, the sliding assembly includes pulleys installed inside the sliding seat, the pulleys are evenly installed on the top and bottom of the sliding seat, each of the pulleys is rotatably installed inside the sliding seat through a rotating shaft, and a lubrication assembly is arranged inside the sliding seat.

[0007] As a further technical solution of the present invention, the lubrication assembly includes a liquid storage cavity opened inside the sliding seat, a first sponge is arranged inside the liquid storage cavity, the first sponge is arranged below the pulley, a fixing frame is fixedly installed on the outer wall of the first sponge, the fixing frame is slidably installed inside the sliding seat, a wedge is arranged at one end of the fixing frame, the wedge is fixedly installed on one side of the connecting plate, a moving block is fixedly installed on the other side of the connecting plate, a limiting block is arranged at one end of the moving block, and the limiting block is embedded in the furnace body;

[0008] A fixing plate is fixedly installed on one side of the connecting plate, a first baffle is fixedly installed on one end of the fixing plate, the first baffle is slidably installed inside the liquid storage cavity, a liquid outlet is provided at the bottom of the liquid storage cavity, and the liquid outlet is provided at the top of the pulley.

[0009] As a further technical solution of the present invention, a second sponge is installed at both ends of the liquid outlet.

[0010] As a further technical solution of the present invention, the connecting plate is slidably mounted inside the sliding seat, and a first spring is installed between the connecting plate and the sliding seat.

[0011] As a further technical solution of the present invention, the fixing frame is slidably mounted inside the sliding seat, and a second spring is installed between the fixing frame and the sliding seat.

[0012] As a further technical solution of the present invention, a second baffle is provided on one side of the first baffle, and the second baffle is fixedly mounted on the outer wall of the fixed plate.

[0013] As a further technical solution of the present invention, the limit block is slidably installed inside the furnace body, and a third spring is arranged between the limit block and the furnace body.

[0014] As a further technical solution of the present invention, a mounting frame is installed at one end of the sliding seat, and cleaning rollers are rotatably installed at both ends of the mounting frame.

[0015] As a further technical solution of the present invention, the mounting frame is connected to the sliding seat by bolts.

[0016] A door sealing method for a pneumatic automatic door sealing device of a carbon quenching multi-purpose furnace comprises the following steps:

[0017] S1: When the furnace door of the carbon quenching multi-purpose furnace is opened, the sliding seat is pushed outward by the cylinder driving output end, and the movement of the sliding seat drives the movement of the furnace door, thereby opening the opening of the furnace body. During the movement of the furnace door, the sliding seat slides inside the furnace body, and the friction between the furnace door and other components during the opening process is significantly reduced through the pulley;

[0018] S2: The movement of the sliding seat drives the movement of the moving block. When the moving block contacts the limit block, it slides into the sliding seat under force. The movement of the moving block drives the movement of the connecting plate. The movement of the connecting plate drives the movement of the wedge block. The movement of the wedge block drives the fixed frame to move upward. The movement of the fixed frame drives the first sponge to move upward and contact the bottom of the pulley. When the sliding seat moves, the pulley rotates and contacts the top of the first sponge, thereby lubricating the pulley installed on the top of the sliding seat.

[0019] S3: The movement of the connecting plate drives the movement of the fixed plate, and the movement of the fixed plate drives the movement of the first baffle plate, so that the first baffle plate moves to open the liquid outlet hole, and the lubricating liquid in the liquid storage cavity is discharged from the liquid outlet hole, thereby lubricating the pulley installed at the bottom of the sliding seat;

[0020] S4: When the moving block is separated from the limit block, the first spring releases the elastic potential energy to reset the first baffle to reset the first baffle to block the liquid outlet. Similarly, the wedge moves to the side away from the fixed frame to separate from it, and the second spring releases the elastic potential energy to drive the fixed frame to move downward and reset, so that the first sponge moves downward to separate from the pulley and stop lubrication.

[0021] S5: When the furnace door is closed, the moving block contacts the limiting block so that the limiting block is forced to slide into the furnace body, and the moving block does not move, so that the furnace door is closed without lubrication.

[0022] The beneficial effects of the present invention are as follows:

[0023] 1. The present invention arranges the sliding assembly. When the furnace door of the carbon quenching multi-purpose furnace is opened, the sliding seat is pushed outward by the cylinder driving output end. The movement of the sliding seat drives the movement of the furnace door, thereby opening the opening of the furnace body. During the movement of the furnace door, the sliding seat slides inside the furnace body. The pulley significantly reduces the friction between the furnace door and other components during the opening process, making the movement of the furnace door smoother, thereby ensuring the smooth opening and closing of the furnace door and extending its service life.

[0024] When the sliding seat moves, the first sponge is driven by the movable member, and the movable member is pressed against the movable member, and the movable member is pressed against the movable member, and the movable member is pressed against the movable member, and the movable member is pressed against the movable member, and the movable member is pressed against the movable member, and the movable member is pressed against the movable member, and the movable member is pressed against the movable member, and the movable member is pressed against the movable member, and the movable member is pressed against the movable member, and the movable member is pressed against the movable member, and the movable member is pressed against the movable member,

[0025] 3. The present invention is slidably installed inside the furnace body through a limit block. When the furnace door is closed, the moving block moves to one side of the limit block to reset. When the moving block contacts the limit block, the limit block is forced to slide into the furnace body, and the moving block does not move, so that no lubrication is performed when the furnace door is closed. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0027] Figure 2 It is a schematic cross-sectional view of the overall structure of the present invention;

[0028] Figure 3 For the present invention Figure 2 A schematic diagram of the structure enlargement in the middle;

[0029] Figure 4 It is a structural schematic diagram of the sliding seat of the present invention;

[0030] Figure 5 It is a schematic cross-sectional view of the structure of the sliding seat of the present invention;

[0031] Figure 6 For the present invention Figure 5 A magnified schematic diagram of the structure at B in the middle;

[0032] Figure 7 It is a structural schematic diagram of the second baffle of the present invention.

[0033] In the figure: 1. furnace body; 2. furnace door; 3. sliding seat; 4. output end; 5. cylinder; 6. pulley; 7. rotating shaft; 8. limit block; 9. moving block; 10. connecting plate; 11. wedge block; 12. fixing frame; 13. first sponge; 14. liquid storage chamber; 15. liquid outlet; 16. first baffle plate; 17. fixing plate; 18. second baffle plate; 19. second sponge; 20. first spring; 21. second spring; 22. third spring; 23. liquid filling plug; 24. mounting frame; 25. bolt; 26. cleaning roller. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. 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.

[0035] like Figures 1 to 7 As shown, in the embodiment of the present invention, a pneumatic automatic door sealing device for a carbon quenching multi-purpose furnace comprises a furnace body 1, a furnace door 2 is installed on one side of the furnace body 1, a sliding seat 3 is fixedly installed on the side wall of the furnace door 2, two sliding seats 3 are provided, both of the two sliding seats 3 are slidably installed inside the furnace body 1, and sliding components are installed inside the two sliding seats 3, one side of one of the sliding seats 3 is connected to an output end 4, the output end 4 is installed at one end of a cylinder 5, and the cylinder 5 is installed on the side wall of the furnace body 1;

[0036] The sliding assembly includes a pulley 6 installed inside the sliding seat 3. The pulleys 6 are evenly installed at the top and bottom of the sliding seat 3. Each pulley 6 is rotatably installed inside the sliding seat 3 through a rotating shaft 7. A lubrication assembly is provided inside the sliding seat 3.

[0037] Through the setting of the sliding assembly, when the furnace door 2 of the carbon quenching multi-purpose furnace is opened, the output end 4 is driven by the cylinder 5 to push the sliding seat 3 outward, and the movement of the sliding seat 3 drives the movement of the furnace door 2, thereby opening the opening of the furnace body 1. During the movement of the furnace door 2, the sliding seat 3 slides inside the furnace body 1, and the pulley 6 significantly reduces the friction between the furnace door 2 and other components during the opening process, so that the movement of the furnace door 2 is smoother, thereby ensuring the smooth opening and closing of the furnace door 2 and extending its service life.

[0038] like Figures 1 to 7As shown, the lubrication assembly includes a liquid storage chamber 14 opened inside the sliding seat 3, a first sponge 13 is arranged inside the liquid storage chamber 14, the first sponge 13 is arranged below the pulley 6, a fixing frame 12 is fixedly installed on the outer wall of the first sponge 13, the fixing frame 12 is slidably installed inside the sliding seat 3, a wedge block 11 is arranged at one end of the fixing frame 12, the wedge block 11 is fixedly installed on one side of the connecting plate 10, a moving block 9 is fixedly installed on the other side of the connecting plate 10, a limit block 8 is arranged at one end of the moving block 9, and the limit block 8 is embedded in the furnace body 1;

[0039] A fixing plate 17 is fixedly installed on one side of the connecting plate 10, and a first baffle 16 is fixedly installed on one end of the fixing plate 17. The first baffle 16 is slidably installed inside the liquid storage chamber 14. A liquid outlet 15 is provided at the bottom of the liquid storage chamber 14, and the liquid outlet 15 is provided at the top of the pulley 6.

[0040] One end of the moving block 9 close to the limiting block 8 is provided with an arc surface;

[0041] By setting the lubrication component, when the furnace door 2 is opened, the sliding seat 3 slides in the furnace body 1, and the movement of the sliding seat 3 drives the movement of the moving block 9. When the moving block 9 contacts the limit block 8, it slides into the sliding seat 3 under force. The movement of the moving block 9 drives the movement of the connecting plate 10. The movement of the connecting plate 10 drives the movement of the wedge block 11. The movement of the wedge block 11 drives the fixing frame 12 to move upward. The movement of the fixing frame 12 drives the first sponge 13 to move upward and contact with the bottom of the pulley 6. When the sliding seat 3 moves, the pulley 6 rotates and contacts with the top of the first sponge 13, thereby lubricating the pulley 6 installed on the top of the sliding seat 3.

[0042] The movement of the connecting plate 10 drives the movement of the fixing plate 17, and the movement of the fixing plate 17 drives the movement of the first baffle plate 16, so that the first baffle plate 16 moves to open the liquid outlet 15, and the lubricating liquid in the liquid storage chamber 14 is discharged from the liquid outlet 15, thereby lubricating the pulley 6 installed at the bottom of the sliding seat 3;

[0043] By lubricating the pulleys 6 installed on the top and bottom of the sliding seat 3, the anti-jamming effect may be affected to a certain extent after being used for a period of time. Lubricating it can ensure that the pulley 6 can continue to run smoothly, thereby improving the working efficiency of the pulley 6 and extending its service life.

[0044] like Figure 5 and Figure 6 As shown, second sponges 19 are installed at both ends of the liquid outlet 15 .

[0045] The lubricating liquid is absorbed by the second sponge 19 and the first sponge 13 and applied to the surface of the pulley 6 to ensure that the lubricating liquid is evenly distributed on the surface of the pulley 6 to avoid insufficient or excessive local lubrication;

[0046] A liquid adding plug 23 is embedded inside the top end of the sliding seat 3 , and lubricating liquid is added into the liquid storage chamber 14 through the liquid adding plug 23 .

[0047] like Figure 6 As shown, the connecting plate 10 is slidably installed inside the sliding seat 3 , and a first spring 20 is installed between the connecting plate 10 and the sliding seat 3 .

[0048] When the moving block 9 moves into the furnace body 1, the connecting plate 10 moves to force the first spring 20 to deform and store elastic potential energy. When the moving block 9 is separated from the limiting block 8, the first spring 20 releases the elastic potential energy and resets the first baffle 16 to reset and block the liquid outlet 15, thereby controlling the amount of lubricating liquid.

[0049] like Figure 6 As shown, the fixing frame 12 is slidably installed inside the sliding seat 3 , and a second spring 21 is installed between the fixing frame 12 and the sliding seat 3 .

[0050] When the fixing frame 12 moves upward, the second spring 21 is deformed by force to store elastic potential energy. When the wedge block 11 moves and separates from the fixing frame 12, the elastic potential energy is released by the second spring 21 to drive the fixing frame 12 to move downward and reset, thereby causing the first sponge 13 to move downward and separate from the pulley 6, and stop lubrication.

[0051] like Figure 6 and Figure 7 As shown, a second baffle plate 18 is disposed on one side of the first baffle plate 16 , and the second baffle plate 18 is fixedly mounted on the outer wall of the fixing plate 17 .

[0052] A cavity is formed between the first baffle plate 16 and the second baffle plate 18 to reduce the amount of lubricating liquid entering the liquid outlet hole 15 .

[0053] like Figure 3 As shown, the limit block 8 is slidably installed inside the furnace body 1 , and a third spring 22 is arranged between the limit block 8 and the furnace body 1 .

[0054] One end of the limit block 8 away from the moving block 9 is arranged as an arc surface;

[0055] When the furnace door 2 is closed, the moving block 9 moves to one side of the limiting block 8 to reset. When the moving block 9 contacts the limiting block 8, the limiting block 8 is forced to slide into the furnace body 1, and the moving block 9 does not move, so that the furnace door 2 is not lubricated when it is closed.

[0056] When the limiting block 8 is forced to slide into the furnace body 1, the third spring 22 is deformed to store elastic potential energy. When the moving block 9 moves away from the limiting block 8, the third spring 22 releases the elastic potential energy to reset.

[0057] like Figures 2 to 4As shown, a mounting frame 24 is mounted on one end of the sliding seat 3 , and cleaning rollers 26 are rotatably mounted on both ends of the mounting frame 24 .

[0058] When the furnace door 2 moves, the cleaning roller 26 moves inside the slide groove of the furnace body 1, which can clean the inner wall of the slide groove, reduce dust, dirt and old lubricant residue in the slide groove, and make the pulley 6 slide more smoothly in the slide groove, thereby improving the operating efficiency of the pulley 6.

[0059] like Figures 2 to 4 As shown, the mounting bracket 24 is connected to the sliding seat 3 via bolts 25 .

[0060] When the cleaning roller 26 needs to be maintained, it is taken out from the sliding seat 3 by rotating the bolt 25, and the mounting frame 24 and the cleaning roller 26 are disassembled for maintenance.

[0061] A door sealing method for a pneumatic automatic door sealing device of a carbon quenching multi-purpose furnace comprises the following steps:

[0062] S1: When the furnace door 2 of the carbon quenching multi-purpose furnace is opened, the cylinder 5 drives the output end 4 to push the sliding seat 3 outward, and the movement of the sliding seat 3 drives the movement of the furnace door 2, thereby opening the opening of the furnace body 1. During the movement of the furnace door 2, the sliding seat 3 slides inside the furnace body 1, and the pulley 6 significantly reduces the friction between the furnace door 2 and other components during the opening process;

[0063] S2: The movement of the sliding seat 3 drives the movement of the moving block 9. When the moving block 9 contacts the limit block 8, it slides into the sliding seat 3 under force. The movement of the moving block 9 drives the movement of the connecting plate 10. The movement of the connecting plate 10 drives the movement of the wedge block 11. The movement of the wedge block 11 drives the fixing frame 12 to move upward. The movement of the fixing frame 12 drives the first sponge 13 to move upward and contact the bottom of the pulley 6. When the sliding seat 3 moves, the pulley 6 rotates and contacts the top of the first sponge 13, thereby lubricating the pulley 6 installed on the top of the sliding seat 3.

[0064] S3: The movement of the connecting plate 10 drives the movement of the fixing plate 17, and the movement of the fixing plate 17 drives the movement of the first baffle plate 16, so that the first baffle plate 16 moves to open the liquid outlet 15, and the lubricating liquid in the liquid storage chamber 14 is discharged from the liquid outlet 15, thereby lubricating the pulley 6 installed at the bottom of the sliding seat 3;

[0065] S4: After the moving block 9 is separated from the limiting block 8, the first spring 20 releases the elastic potential energy to reset the first baffle 16 to reset and block the liquid outlet 15. Similarly, the wedge block 11 moves away from the fixing frame 12 and separates from it. The second spring 21 releases the elastic potential energy to drive the fixing frame 12 to move downward and reset, so that the first sponge 13 moves downward and separates from the pulley 6, and the lubrication stops.

[0066] S5: When the furnace door 2 is closed, the moving block 9 contacts the limiting block 8 so that the limiting block 8 is forced to slide into the furnace body 1, and the moving block 9 does not move, so that the furnace door 2 is closed without lubrication.

[0067] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A pneumatic automatic door sealing device for a carbon quenching multi-purpose furnace, comprising a furnace body (1), characterized in that: A furnace door (2) is installed on one side of the furnace body (1), and a sliding seat (3) is fixedly installed on the side wall of the furnace door (2). Two sliding seats (3) are provided, and both of the two sliding seats (3) are slidably installed inside the furnace body (1). Sliding components are installed inside the two sliding seats (3), and one side of one of the sliding seats (3) is connected to an output end (4), and the output end (4) is installed on one end of a cylinder (5), and the cylinder (5) is installed on the side wall of the furnace body (1); The sliding assembly comprises a pulley (6) installed inside the sliding seat (3), the pulleys (6) are evenly installed at the top and bottom of the sliding seat (3), each of the pulleys (6) is rotatably installed inside the sliding seat (3) via a rotating shaft (7), and a lubrication assembly is arranged inside the sliding seat (3).

2. The pneumatic automatic door sealing device for a carbon quenching multi-purpose furnace according to claim 1 is characterized in that: The lubrication assembly comprises a liquid storage chamber (14) opened inside the sliding seat (3), a first sponge (13) is arranged inside the liquid storage chamber (14), the first sponge (13) is arranged below the pulley (6), a fixing frame (12) is fixedly installed on the outer wall of the first sponge (13), the fixing frame (12) is slidably installed inside the sliding seat (3), a wedge block (11) is arranged at one end of the fixing frame (12), the wedge block (11) is fixedly installed on one side of the connecting plate (10), a moving block (9) is fixedly installed on the other side of the connecting plate (10), a limit block (8) is arranged at one end of the moving block (9), and the limit block (8) is embedded in the furnace body (1); A fixing plate (17) is fixedly mounted on one side of the connecting plate (10), a first baffle (16) is fixedly mounted on one end of the fixing plate (17), the first baffle (16) is slidably mounted inside the liquid storage chamber (14), a liquid outlet hole (15) is provided at the bottom of the liquid storage chamber (14), and the liquid outlet hole (15) is provided at the top end of the pulley (6).

3. The pneumatic automatic door sealing device for a carbon quenching multi-purpose furnace according to claim 2 is characterized in that: Second sponges (19) are installed at both ends of the liquid outlet hole (15).

4. The pneumatic automatic door sealing device for a carbon quenching multi-purpose furnace according to claim 2 is characterized in that: The connecting plate (10) is slidably mounted inside the sliding seat (3), and a first spring (20) is mounted between the connecting plate (10) and the sliding seat (3).

5. The pneumatic automatic door sealing device for a carbon quenching multi-purpose furnace according to claim 2 is characterized in that: The fixed frame (12) is slidably mounted inside the sliding seat (3), and a second spring (21) is mounted between the fixed frame (12) and the sliding seat (3).

6. The pneumatic automatic door sealing device for a carbon quenching multi-purpose furnace according to claim 2 is characterized in that: A second baffle (18) is provided on one side of the first baffle (16), and the second baffle (18) is fixedly mounted on the outer wall of the fixed plate (17).

7. The pneumatic automatic door sealing device for a carbon quenching multi-purpose furnace according to claim 2 is characterized in that: The limit block (8) is slidably mounted inside the furnace body (1), and a third spring (22) is provided between the limit block (8) and the furnace body (1).

8. The pneumatic automatic door sealing device for a carbon quenching multi-purpose furnace according to claim 1 is characterized in that: A mounting frame (24) is mounted on one end of the sliding seat (3), and cleaning rollers (26) are rotatably mounted on both ends of the mounting frame (24).

9. The pneumatic automatic door sealing device for a carbon quenching multi-purpose furnace according to claim 8, characterized in that: The mounting frame (24) is connected to the sliding seat (3) via bolts (25).

10. A door sealing method for a pneumatic automatic door sealing device for a carbon quenching multi-purpose furnace, the method being applicable to the pneumatic automatic door sealing device for a carbon quenching multi-purpose furnace as claimed in claims 1 to 9, characterized in that: The following steps are involved: S1: When the furnace door (2) of the carbon quenching multipurpose furnace is opened, the cylinder (5) drives the output end (4) to push the sliding seat (3) outward, and the movement of the sliding seat (3) drives the movement of the furnace door (2), thereby opening the opening of the furnace body (1). During the movement of the furnace door (2), the sliding seat (3) slides inside the furnace body (1), and the friction between the furnace door (2) and other components during the opening process is significantly reduced through the pulley (6); S2: The movement of the sliding seat (3) drives the movement of the moving block (9). When the moving block (9) contacts the limit block (8), it is forced to slide into the sliding seat (3). The movement of the moving block (9) drives the movement of the connecting plate (10). The movement of the connecting plate (10) drives the movement of the wedge block (11). The movement of the wedge block (11) drives the fixing frame (12) to move upward. The movement of the fixing frame (12) drives the first sponge (13) to move upward and contact the bottom of the pulley (6). When the sliding seat (3) moves, the pulley (6) rotates and contacts the top of the first sponge (13), thereby lubricating the pulley (6) installed on the top of the sliding seat (3); S3: The movement of the connecting plate (10) drives the movement of the fixed plate (17), and the movement of the fixed plate (17) drives the movement of the first baffle plate (16), so that the first baffle plate (16) moves to open the liquid outlet hole (15), and the lubricating liquid in the liquid storage chamber (14) is discharged from the liquid outlet hole (15), thereby lubricating the pulley (6) installed at the bottom of the sliding seat (3); S4: After the moving block (9) is separated from the limiting block (8), the first spring (20) releases the elastic potential energy to reset the first baffle (16) to reset and block the liquid outlet (15). Similarly, the wedge block (11) moves to the side away from the fixed frame (12) to separate from it, and the second spring (21) releases the elastic potential energy to drive the fixed frame (12) to move downward and reset, so that the first sponge (13) moves downward to separate from the pulley (6), and lubrication stops; S5: When the furnace door (2) is closed, the moving block (9) contacts the limiting block (8) so that the limiting block (8) is forced to slide into the furnace body (1), and the moving block (9) does not move, so that lubrication is not performed when the furnace door (2) is closed.

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