Movable tail gate of quenching furnace

Abstract

The utility model relates to the field of quenching furnaces, in particular to a movable tail door of a quenching furnace, which adopts the technical scheme that the movable tail door of the quenching furnace comprises a movable door, a door frame, a furnace mouth, a movable frame, a sealing ring, a heat insulation pad and hydraulic cylinders, the rear end of the movable door is provided with a heat insulation pad, the upper end of the movable door is fixedly connected with lifting rings in bilateral symmetry, the upper end of the movable frame is fixedly connected with protruding blocks in bilateral symmetry, the left end and the right end of the movable frame are symmetrically and fixedly connected with protruding blocks, the rear end of the movable frame is provided with a sealing ring, and the outer wall of the rear end of the movable door is attached to the inner wall of the movable frame. The hydraulic cylinder, the movable frame and the sealing ring are installed on the movable door, the output end of the hydraulic cylinder is retracted to enable the movable frame to keep a certain distance from a furnace opening in the opening and closing process, gaps generated by friction between the movable door and the furnace opening are avoided, and the heat preservation effect of the quenching furnace is guaranteed.

Description

Technical Field

[0001] This utility model belongs to the field of quenching furnaces, specifically relating to the movable tail door of a quenching furnace. Background Technology

[0002] The movable tail door of a quenching furnace generally refers to a door structure that can be opened and closed. It is usually installed at the outlet of the quenching furnace to seal the heat inside the furnace and facilitate the entry and exit of workpieces.

[0003] Most existing quenching furnaces have vertically opening tail doors. To seal the heat inside the furnace, the tail door closes against the furnace opening. When workpieces need to be placed in or removed from the quenching furnace, the tail door needs to be opened first and then closed. During the raising and lowering process, the tail door will rub against the furnace opening. After long-term use, gaps will form at the joint between the tail door and the furnace opening due to repeated friction, resulting in poor sealing of the quenching furnace and affecting the heat preservation effect.

[0004] Therefore, to address the issue that the sliding door of the aforementioned quenching furnace is prone to wear at the joint between the sliding door and the furnace opening during use, which can eventually lead to gaps and affect the heat preservation effect, a new sliding door for the quenching furnace is designed. By installing a heat insulation pad, hydraulic cylinder, sliding frame, and sealing ring on the sliding door, a certain distance is maintained between the sliding door and the furnace opening during opening and closing, avoiding friction between the sliding door and the furnace opening. After closing, the sliding door fits tightly against the furnace opening, ensuring the heat preservation effect of the quenching furnace. Utility Model Content

[0005] To overcome the problem that friction easily occurs at the joint between the movable door and the furnace opening during use, causing wear and tear, which over time creates gaps and affects the heat preservation effect of the quenching furnace.

[0006] The technical solution of this utility model is as follows: a movable tail door of a quenching furnace, including a movable door and a door frame, and further including a furnace opening, a movable frame, a sealing ring, a heat insulation pad, and a hydraulic cylinder. A symmetrical hydraulic cylinder is installed at the upper end of the movable door, and symmetrical hydraulic cylinders are installed at both ends of the movable door. A heat insulation pad is installed at the rear end of the movable door. A symmetrical lifting ring is fixed to the upper end of the movable door. A symmetrical protrusion is fixed to the upper end of the movable frame, and symmetrical protrusions are fixed to both ends of the movable frame. A sealing ring is installed at the rear end of the movable frame. The outer wall of the rear end of the movable door is flush with the movable frame. The inner walls of the moving frame are fitted together, the output end of the hydraulic cylinder is connected to the protrusion, and the upper end of the door frame is equipped with symmetrical motors and drums. The two sets of drums are located at the ends of the two sets of motors that are far apart from each other. The drums are equipped with steel wire ropes. The upper end of the door frame is fixed with two sets of first support blocks and second support blocks that are symmetrically distributed. The drums are installed between the first support blocks and the second support blocks. The output end of the motor passes through the second support block and is connected to the ends of the drums that are far apart from each other. The upper end of the steel wire rope is installed on the drums, and the lower end of the steel wire rope is installed on the lifting ring.

[0007] Preferably, the rear edge of the movable door is provided with eight sets of limiting grooves equidistantly distributed around the movable door, and the front edge of the movable frame is fixed with eight sets of first limiting posts equidistantly distributed around the movable frame, with the inner wall of the limiting grooves fitting against the outer wall of the first limiting posts.

[0008] As a preferred option, the sealing ring is made of slag wool, and the heat insulation pad is made of diatomaceous earth.

[0009] Preferably, the left and right ends of the movable door are fixed with two sets of symmetrical limit sleeves, and the rear end of the door frame is fixed with a second symmetrical limit post, with the limit sleeves and the second limit post being compatible.

[0010] Preferably, the upper end of the door frame has symmetrical through holes located directly below the roller.

[0011] Preferably, limit blocks are fixed to the inner walls of the left and right ends of the door frame, and rope frames are installed on the limit blocks, with steel wire ropes passing through the through holes and rope frames.

[0012] Preferably, a temperature measuring instrument is installed at the front edge of the sliding door, and symmetrical support plates are installed at the lower end of the sliding door.

[0013] The beneficial effects of this utility model are:

[0014] 1. The adjustable movable door structure, consisting of a movable door, a hydraulic cylinder, and a movable frame, allows the output end of the hydraulic cylinder to retract and drive the movable frame to move along the inner wall of the rear end of the movable door, moving the movable frame away from the furnace opening. When it is necessary to open or close the movable door, the hydraulic cylinder can pull the movable frame away from the furnace opening and then raise the movable door, avoiding friction between the movable door and the furnace opening. Compared with the existing movable tail door structure, the adjustable movable door structure can avoid friction between the movable door and the furnace opening, preventing gaps caused by friction between the movable door and the furnace opening from affecting the heat preservation effect.

[0015] 2. By installing a sealing ring and a heat insulation pad between the movable door and the furnace opening, the heat insulation pad can seal the gap between the movable door and the movable frame, and the sealing ring can seal the gap between the movable frame and the furnace opening. The heat insulation pad, which is close to the movable frame, and the sealing ring, which is close to the furnace opening, can ensure the sealing performance of the adjustable movable door structure. Compared with the existing movable tail door structure, the added sealing ring and heat insulation pad can further improve the sealing performance of the adjustable movable door structure and ensure the heat preservation of the quenching furnace. Attached Figure Description

[0016] Figure 1 The diagram shown is a three-dimensional structural schematic of the movable tail door of the quenching furnace of this utility model.

[0017] Figure 2 The diagram shown is a three-dimensional disassembled view of the movable tail door of the quenching furnace of this utility model.

[0018] Figure 3 The diagram shown is a three-dimensional disassembled view of the movable tail door of the quenching furnace of this utility model.

[0019] Figure 4 The diagram shown is a three-dimensional structural schematic of the movable tail door of the quenching furnace of this utility model.

[0020] Figure 5 The diagram shown is a three-dimensional disassembled view of the movable tail door and door frame of the quenching furnace of this utility model.

[0021] Figure 6 The diagram shown is a three-dimensional structural schematic of the movable tail door and door frame of the quenching furnace of this utility model.

[0022] Figure 7 The diagram shown is a three-dimensional structural schematic of the movable tail door of the quenching furnace of this utility model.

[0023] Explanation of reference numerals in the attached drawings: 1-Moving door, 2-Furnace opening, 3-Door frame, 4-Moving frame, 5-Sealing ring, 6-Heat insulation pad, 7-Hydraulic cylinder, 8-Protrusion, 9-First limiting post, 10-Limiting groove, 11-First support block, 12-Drum, 13-Second support block, 14-Motor, 15-Wire rope, 16-Lifting ring, 17-Limiting sleeve, 18-Second limiting post, 19-Limiting block, 20-Rope frame, 21-Through hole, 22-Support plate, 23-Temperature measuring instrument. Detailed Implementation

[0024] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0025] Please see Figures 1-7This utility model provides an embodiment of a quenching furnace's movable tail door, comprising a movable door 1 and a door frame 3, as well as a furnace opening 2, a movable frame 4, a sealing ring 5, a heat insulation pad 6, and a hydraulic cylinder 7. The upper end of the movable door 1 is equipped with symmetrically arranged hydraulic cylinders 7, and the left and right ends of the movable door 1 are also symmetrically equipped with hydraulic cylinders 7. A heat insulation pad 6 is installed at the rear end of the movable door 1. Symmetrically arranged lifting rings 16 are fixed to the upper end of the movable door 1. Symmetrically arranged protrusions 8 are fixed to the upper end of the movable frame 4, and the left and right ends of the movable frame 4 are also symmetrically fixed with protrusions 8. A sealing ring 5 is installed at the rear end of the movable frame 4. The outer wall of the rear end of the movable door 1 is in contact with the inner wall of the movable frame 4. The output end of the hydraulic cylinder 7 is connected to the protrusion 8. The upper end of the door frame 3 is equipped with two symmetrical motors 14 and drums 12. The two sets of drums 12 are located at the ends of the two sets of motors 14 that are far apart from each other. The drums 12 are equipped with wire ropes 15. The upper end of the door frame 3 is fixed with two sets of first support blocks 11 and second support blocks 13 that are symmetrically distributed. The drums 12 are installed between the first support blocks 11 and the second support blocks 13. The output end of the motor 14 passes through the second support block 13 and is connected to the ends of the drums 12 that are far apart from each other. The upper end of the wire rope 15 is installed on the drums 12, and the lower end of the wire rope 15 is installed on the lifting ring 16.

[0026] The output of the motor 14 rotates the drum 12, which winds or unwinds the wire rope 15. This winding or unwinding pulls the movable door 1 up or down. The output of the hydraulic cylinder 7 retracts or extends, moving the movable frame 4 back and forth along the inner rear wall of the movable door 1, thus moving the movable frame 4 away from or close to the furnace opening 2. When the movable door 1 needs to be opened or closed, the hydraulic cylinder 7 can pull the movable frame 4 away from the furnace opening 2 before raising the movable door 1, avoiding friction between the movable frame 4 and the furnace opening 2. When the movable door 1 needs to be closed, the hydraulic cylinder 7 can move the movable frame 4 close to the furnace opening 2, ensuring that the sealing ring 5 fits tightly against the furnace opening 2. The heat insulation pad 6, which is close to the movable frame 4, and the sealing ring 5, which is close to the furnace opening 2, ensure the sealing of the movable door 1, thus avoiding gaps caused by friction between the movable door 1 and the furnace opening 2 while maintaining the temperature of the quenching furnace.

[0027] Please see Figure 3In this embodiment, eight sets of limiting grooves 10 are provided at the rear edge of the movable door 1, which are equidistantly distributed around the movable door 1. Eight sets of first limiting posts 9 are fixed at the front edge of the movable frame 4, which are equidistantly distributed around the movable frame 4. The inner wall of the limiting groove 10 is in contact with the outer wall of the first limiting post 9. In use, the movement of the movable frame 4 can be limited by the outer wall of the first limiting post 9 being in contact with the inner wall of the limiting groove 10, so as to ensure the stability of the movable frame 4 when it moves. The sealing ring 5 is made of slag wool, and the heat insulation pad 6 is made of diatomaceous earth. In use, the sealing ring 5 made of slag wool has good heat resistance and sealing performance, and the heat insulation pad 6 made of diatomaceous earth has strong heat resistance, which improves the sealing performance between the movable door 1, the movable frame 4 and the furnace opening 2.

[0028] Please see Figures 5-6 In this embodiment, two sets of symmetrical limiting sleeves 17 are fixedly connected to the left and right ends of the movable door 1, and two symmetrical second limiting posts 18 are fixedly connected to the rear end of the door frame 3. The limiting sleeves 17 and the second limiting posts 18 are adapted to each other. In use, the movement of the movable door 1 can be limited by the inner wall of the limiting sleeve 17 being in contact with the outer wall of the second limiting post 18, so as to ensure the stability of the movable door 1 when it moves.

[0029] Please see Figures 6-7 In this embodiment, the upper end of the door frame 3 is provided with symmetrical through holes 21. The through holes 21 are located directly below the drum 12. In use, the wire rope 15 can be connected to the drum 12 and the lifting ring 16 through the through holes 21. Limiting blocks 19 are fixed to the inner walls of the left and right ends of the door frame 3. Rope frames 20 are installed on the limiting blocks 19. The wire rope 15 passes through the through holes 21 and the rope frames 20. In use, the lifting height of the movable door 1 can be limited by the limiting blocks 19. The rope frames 20 can prevent the wire rope 15 from getting tangled or rubbing against the door frame 3. A thermometer 23 is installed at the front edge of the movable door 1. Symmetrical support plates 22 are installed at the lower end of the movable door 1. In use, the thermometer 23 can measure the temperature inside the quenching furnace. The support plates 22 can support the movable door 1 and prevent the movable door 1 from colliding with the ground.

[0030] When working, first start the motor 14. The output end of the motor 14 drives the drum 12 to rotate slowly. Wait for the drum 12 to rotate slowly to loosen the wire rope 15 so that the movable door 1 can descend. When the movable door 1 descends to the furnace opening 2, turn off the motor 14. Then start the hydraulic cylinder 7. The output end of the hydraulic cylinder 7 pushes the movable frame 4 close to the furnace opening 2. After the sealing ring 5 on the movable frame 4 is in contact with the furnace opening 2, turn off the hydraulic cylinder 7.

[0031] When it is necessary to open the movable door 1, first start the hydraulic cylinder 7, and pull the movable frame 4 through the output end of the hydraulic cylinder 7. After the movable frame 4 is kept at a distance from the furnace opening 2, the hydraulic cylinder 7 is closed. Then start the motor 14. The motor 14 drives the drum 12 to rotate, which tightens the wire rope 15. The tightened wire rope 15 pulls the movable door 1 up. When the upper end of the movable door 1 is about to approach the lower end of the limit block 19, the motor 14 is turned off.

[0032] Through the above steps, the output end of the hydraulic cylinder 7 can retract or extend to drive the movable frame 4 to move back and forth along the inner wall of the rear end of the movable door 1. When it is necessary to open or close the movable door 1, the hydraulic cylinder 7 can pull the movable frame 4 away from the furnace opening 2 to avoid friction with the furnace opening 2. When it is necessary to close the movable door 1 tightly, the hydraulic cylinder 7 can drive the movable frame 4 to come close to make the sealing ring 5 tightly fit the furnace opening 2. The sealing ring 5 tightly fits the furnace opening 2 to ensure the sealing of the movable door 1. This solves the problem that friction easily occurs at the joint between the movable door 1 and the furnace opening 2, leading to wear and eventually gaps that affect the heat preservation effect.

[0033] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A movable tail door for a quenching furnace, comprising a movable door (1) and a door frame (3), characterized in that: It also includes a furnace opening (2), a movable frame (4), a sealing ring (5), a heat insulation pad (6), and a hydraulic cylinder (7). A symmetrical hydraulic cylinder (7) is installed at the upper end of the movable door (1), and symmetrical hydraulic cylinders (7) are installed at both ends of the movable door (1). A heat insulation pad (6) is installed at the rear end of the movable door (1). A symmetrical lifting ring (16) is fixed to the upper end of the movable door (1). A symmetrical protrusion (8) is fixed to the upper end of the movable frame (4), and symmetrical protrusions (8) are fixed to both ends of the movable frame (4). A sealing ring (5) is installed at the rear end of the movable frame (4). The outer wall of the rear end of the movable door (1) is in contact with the inner wall of the movable frame (4). The output end of the hydraulic cylinder (7) is in contact with the protrusion (8). The upper end of the door frame (3) is equipped with a left-right symmetrical motor (14) and a drum (12). The two sets of drums (12) are located at the ends of the two sets of motors (14) that are far apart from each other. A wire rope (15) is provided on the drum (12). The upper end of the door frame (3) is fixed with two sets of first support blocks (11) and second support blocks (13) that are symmetrically distributed left and right. The drum (12) is installed between the first support block (11) and the second support block (13). The output end of the motor (14) passes through the second support block (13) and is connected to the ends of the drum (12) that are far apart from each other. The upper end of the wire rope (15) is installed on the drum (12), and the lower end of the wire rope (15) is installed on the lifting ring (16).

2. The movable tail door of the quenching furnace according to claim 1, characterized in that: Eight sets of limiting grooves (10) are provided at the rear edge of the movable door (1) and are distributed at equal intervals around the movable door (1). Eight sets of first limiting posts (9) are fixed at the front edge of the movable frame (4) and are distributed at equal intervals around the movable frame (4). The inner wall of the limiting groove (10) is in contact with the outer wall of the first limiting post (9).

3. The movable tail door of the quenching furnace according to claim 2, characterized in that: The sealing ring (5) is made of slag wool, and the heat insulation pad (6) is made of diatomaceous earth.

4. The movable tail door of the quenching furnace according to claim 3, characterized in that: The left and right ends of the movable door (1) are fixed with two sets of symmetrical limit sleeves (17), and the rear end of the door frame (3) is fixed with a second symmetrical limit post (18). The limit sleeves (17) and the second limit post (18) are compatible.

5. The movable tail door of the quenching furnace according to claim 4, characterized in that: The upper end of the door frame (3) is provided with symmetrical through holes (21), which are located directly below the roller (12).

6. The movable tail door of the quenching furnace according to claim 5, characterized in that: Limit blocks (19) are fixed to the inner walls of the left and right ends of the door frame (3). A rope frame (20) is installed on the limit block (19). The wire rope (15) passes through the through hole (21) and the rope frame (20).

7. The movable tail door of the quenching furnace according to claim 6, characterized in that: A thermometer (23) is installed at the front edge of the movable door (1), and a symmetrical support plate (22) is installed at the lower end of the movable door (1).

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