A hoisting device for a quenching and tempering roller of a pit furnace

Abstract

The utility model relates to hoist equipment field, and disclose a hoisting device of utilization well type furnace conditioning roll, including gantry crane, the top end sliding joint of gantry crane has the mobile seat, the below of gantry crane places well type furnace, the bottom of mobile seat is fixed with fixed column, the outer wall of fixed column is provided with mobile column, the outer wall sliding joint of mobile column has fixed clamping piece and auxiliary support. The device is through fixed clamping piece to the roll bottom end outer wall clamping and adhering, and makes the roll outer wall bottom and the contact extrusion of the top rod, makes the top rod extrusion contraction to fixed clamping piece inside, drives the limit seat and mobile column inner wall adhering, the position of fixed clamping piece is positioned locking, while auxiliary support drives auxiliary jaw and rolls top end outer wall clamping and adhering, through fixed clamping piece and auxiliary jaw can make the roll when hoisting to well type furnace will not shift or sway, causes the roll and furnace wall collision or uneven heating.

Description

Technical Field

[0001] This utility model relates to the field of hoisting equipment, and in particular to a hoisting device utilizing the tempering rolls of a pit furnace. Background Technology

[0002] Pit furnaces are periodic operation furnaces suitable for the heat treatment of rod-shaped and long shaft-shaped parts. The structure of a pit furnace is a deep, cylindrical well. The fuels used are typically coal gas and oil. When electricity is used as the heat source, it is called a pit-type resistance furnace. Pit furnaces are generally installed below the workshop floor level, but some are installed above ground level, or partially above and below ground level. Names for pit furnaces include: forced convection pit furnace, natural convection pit furnace, and pit-type gas carburizing furnace.

[0003] Since pit furnaces have a vertical structure, the rolling mill rolls need to be lowered vertically from the furnace opening to a designated position inside the furnace. Therefore, a hoisting device is required to control the descent of the rolling mill rolls into the pit furnace.

[0004] Regarding the above and existing related technologies, the inventors believe that the following defects often exist: Existing hoisting devices usually hoist the rolls using wire ropes. However, when hoisting with wire ropes, the falling state of the rolls cannot be controlled, which makes it easy for the falling trajectory of the rolls to deviate, collide with the furnace wall, or cause uneven heating. Utility Model Content

[0005] The technical problem to be solved by this utility model is that the existing hoisting device cannot control the falling state of the roll, which makes it easy for the falling trajectory of the roll to deviate, collide with the furnace wall or be heated unevenly. To this end, we propose a hoisting device for tempering rolls in a pit furnace.

[0006] To achieve the above objectives, this application adopts the following technical solution: a hoisting device for tempering rolls of a pit furnace, including a gantry crane, a movable seat slidably connected to the top of the gantry crane, a pit furnace placed below the gantry crane, a fixed column fixed to the bottom of the movable seat, a movable column provided on the outer wall of the fixed column, and a fixed clamp and an auxiliary support slidably connected to the outer wall of the movable column. A top rod is slidably connected to the top of the outer wall of the fixed clamping member and extends into the interior of the fixed clamping member. A support plate is fixed to the bottom end of the top rod and slides inside the fixed clamping member. A limit seat is fixed to the bottom end of the support plate and fits against the inner wall of the moving column. A support spring is fixed between the bottom end of the support plate and the inner wall of the fixed clamping member. The auxiliary support has an auxiliary gripper that slides and extends on its outer wall and is clamped and fitted against the outer wall of the roll. A high-temperature resistant telescopic spring is fixed between the auxiliary gripper and the auxiliary support.

[0007] Preferably, a motor is fixed inside the movable base, and a threaded rod is fixed to the output end of the motor and rotatably connected to the inside of the fixed column. A sliding seat is slidably fitted onto the outer wall of the threaded rod, and the sliding seat is fixedly connected to the outer wall of the movable column.

[0008] Preferably, a second motor is fixed to the top of the movable column, and a second threaded rod is fixed to the output end of the second motor and rotatably connected to the inside of the movable column. Multiple lifting slides are slidably sleeved on the outer wall of the second threaded rod. Telescopic frames are rotatably connected to both sides of the multiple lifting slides through bearings, and the other side of the telescopic frames is rotatably connected to the outer wall of the fixed clamp and the auxiliary support, respectively.

[0009] Preferably, the top of the pit furnace is provided with a feed inlet for the movement column, the fixed clamping member, and the auxiliary support to enter and exit. The fixed clamping member has a support groove inside that matches the support plate. The outer wall of the movement column is provided with a sliding groove that matches the fixed clamping member and the auxiliary support. The bottom of the limiting seat is provided with a plurality of conical teeth, and the top of the sliding groove is provided with a conical groove that meshes with the conical teeth.

[0010] Preferably, the fixing clamping component includes a connecting bracket and a fixing claw, and the fixing claw and the auxiliary claw are made of ZG40Cr25Ni20 heat-resistant steel casting, with a bead-shaped heat insulation sleeve inlaid on the inner arc surface, the inner arc surface being the contact working surface, and the inner arc surface of the auxiliary claw being provided with multiple raised lines.

[0011] Preferably, the outer wall of the fixed column is provided with a lifting groove that matches the sliding seat, the inner wall of the movable column is provided with a limiting groove that matches the lifting slide seat, and the limiting groove is provided with a telescopic space that matches the telescopic frame.

[0012] The technical effects and advantages of this utility model are as follows: In this invention, a fixed clamping component clamps and adheres to the outer wall of the bottom end of the roll, and the bottom end of the outer wall of the roll contacts and presses against the top rod at the top of the fixed clamping component. The top rod is compressed and retracts into the fixed clamping component, which allows the limiting seat to adhere and fix to the inner wall of the moving column, thus limiting and locking the position of the fixed clamping component. At the same time, when the fixed clamping component clamps and adheres to the outer wall of the bottom end of the roll, the auxiliary bracket drives the auxiliary gripper to clamp and adhere to the outer wall of the top end of the roll. Through the fixed clamping component and the auxiliary gripper, the roll will not shift or shake when it is hoisted to the pit furnace, which would cause the roll to collide with the furnace wall or cause uneven heating. Attached Figure Description

[0013] The disclosure of this utility model is illustrated with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of this utility model. In the drawings, the same reference numerals are used to refer to the same parts: Figure 1 This is a schematic diagram of the overall structure of the gantry crane and pit furnace of this utility model; Figure 2 This is a schematic diagram of the connection structure between the movable column and the pit furnace of this utility model. Figure 3 This is a cross-sectional structural diagram of the fixing column of this utility model; Figure 4 This is a cross-sectional structural diagram of the movable column of this utility model; Figure 5 This is a cross-sectional schematic diagram of the connection structure between the movable column and the fixed clamping component of this utility model. Figure 6 This is a cross-sectional schematic diagram of the connection structure between the auxiliary support and the auxiliary gripper of this utility model.

[0014] Legend: 1. Gantry crane; 101. Moving seat; 2. Pit furnace; 3. Fixed column; 301. Motor No. 1; 302. Threaded rod No. 1; 303. Sliding seat; 4. Moving column; 401. Motor No. 2; 402. Threaded rod No. 2; 403. Lifting slide; 404. Telescopic frame; 5. Fixed clamping component; 501. Top rod; 502. Support plate; 503. Limiting seat; 504. Support spring; 6. Auxiliary bracket; 601. Auxiliary gripper; 602. High temperature resistant telescopic spring. Detailed Implementation

[0015] It is readily understood that, based on the technical solution of this utility model, those skilled in the art can propose various interchangeable structural methods and implementations without altering the essential spirit of this utility model. Therefore, the following detailed embodiments and accompanying drawings are merely illustrative descriptions of the technical solution of this utility model and should not be considered as the entirety of this utility model or as limitations or restrictions on the technical solution of this utility model.

[0016] Reference Figures 1-6 As shown, this utility model provides a technical solution: a hoisting device for tempering rolls of a pit furnace, including a gantry crane 1, a movable seat 101 slidably connected to the top of the gantry crane 1, a pit furnace 2 placed below the gantry crane 1, a fixed column 3 fixed to the bottom of the movable seat 101, a movable column 4 provided on the outer wall of the fixed column 3, and a fixed clamping member 5 and an auxiliary support 6 slidably connected to the outer wall of the movable column 4; A push rod 501 is slidably connected to the top of the outer wall of the fixed clamping member 5 and extends into the interior of the fixed clamping member 5. A support plate 502 is fixed to the bottom end of the push rod 501 and slides inside the fixed clamping member 5. A limit seat 503 is fixed to the bottom end of the support plate 502 and fits against the inner wall of the moving column 4. A support spring 504 is fixed between the bottom end of the support plate 502 and the inner wall of the fixed clamping member 5. The outer wall of the auxiliary support 6 has an auxiliary gripper 601 that slides and extends, and it is clamped and fitted to the outer wall of the roll. A high-temperature resistant telescopic spring 602 is fixed between the auxiliary gripper 601 and the auxiliary support 6.

[0017] The fixed clamping member 5 clamps and adheres to the outer wall of the bottom end of the roll, and the bottom end of the outer wall of the roll contacts and presses against the top rod 501 at the top of the fixed clamping member 5. The top rod 501 is compressed and retracts into the fixed clamping member 5, so that the limiting seat 503 can be attached and fixed to the inner wall of the moving column 4, and the position of the fixed clamping member 5 is limited and locked to prevent the fixed clamping member 5 from loosening due to accidental contact with the controller when the roll is being transported. At the same time, when the fixed clamping member 5 clamps and adheres to the outer wall of the bottom end of the roll, the auxiliary bracket 6 drives the auxiliary claw 601 to clamp and adhere to the outer wall of the top end of the roll. Through the fixed clamping member 5 and the auxiliary claw 601, the roll will not shift or shake when it is hoisted to the pit furnace 2, so as not to cause the roll to collide with the furnace wall or cause uneven heating.

[0018] Reference Figure 2 and Figure 3 As shown in this embodiment: a No. 1 motor 301 is fixed inside the movable base 101, and a No. 1 threaded rod 302 is fixed to the output end of the No. 1 motor 301 and is rotatably connected to the inside of the fixed column 3. A sliding seat 303 is sleeved and slidably attached to the outer wall of the No. 1 threaded rod 302, and the sliding seat 303 is fixedly connected to the outer wall of the movable column 4. By rotating the No. 1 threaded rod 302, the movable column 4 can be driven to slide stably up and down on the outer wall of the fixed column 3 through the sliding seat 303, so that the movable column 4 can be stably moved into the pit furnace 2.

[0019] Reference Figure 4 and Figure 5 As shown in this embodiment: a second motor 401 is fixed to the top of the moving column 4, and a second threaded rod 402 is fixed to the output end of the second motor 401 and rotatably connected to the inside of the moving column 4. Multiple lifting slides 403 are slidably sleeved on the outer wall of the second threaded rod 402. Telescopic frames 404 are rotatably connected to both sides of the multiple lifting slides 403 through bearings. The other side of the telescopic frame 404 is rotatably connected to the outer wall of the fixed clamping member 5 and the auxiliary support 6 respectively. By rotating the second threaded rod 402, the telescopic frame 404 can be extended and retracted through the lifting slides 403. The extension and retraction of the telescopic frame 404 causes the fixed clamping member 5 and the auxiliary support 6 to extend and retract on the outer wall of the moving column 4, so that the fixed clamping member 5 and the auxiliary support 6 move to move closer to the outer wall of the roll for clamping or move away from the roll for loosening.

[0020] Reference Figures 2-5As shown in this embodiment: the top of the pit furnace 2 is provided with a feed inlet sufficient for the movement column 4, the fixed clamping member 5, and the auxiliary support 6 to enter and exit. The fixed clamping member 5 is provided with a support groove that matches the support plate 502. The outer wall of the movement column 4 is provided with a sliding groove that matches the fixed clamping member 5 and the auxiliary support 6. The bottom end of the limiting seat 503 is provided with multiple conical teeth, and the top end of the sliding groove is provided with a conical groove that engages with the conical teeth. The multiple conical teeth at the bottom end of the limiting seat 503 and the conical groove at the top end of the sliding groove facilitate the limiting seat 503 to move out from inside the fixed clamping member 5 and fit against the inner wall of the movement column 4, so that the conical teeth and the conical groove approach and engage with each other, thus completing the fixing and locking of the fixed clamping member 5 at the position of the inner wall of the movement column 4. This avoids the risk of the fixed clamping member 5 moving during the hoisting process due to the operator accidentally touching the controller, which could cause the roll to loosen and fall off.

[0021] Reference Figure 5 and Figure 6 As shown in this embodiment: the fixed clamping component 5 includes a connecting bracket and a fixed clamping claw. The fixed clamping claw and the auxiliary clamping claw 601 are made of ZG40Cr25Ni20 heat-resistant steel. The inner arc surface is inlaid with a bead-shaped heat insulation sleeve. The inner arc surface is the contact working surface. The inner arc surface of the auxiliary clamping claw 601 is provided with multiple raised lines. By using ZG40Cr25Ni20 heat-resistant steel to cast the fixed clamping claw and the auxiliary clamping claw 601, it is easy to keep the fixed clamping claw and the auxiliary clamping claw 601 stable in high temperature environment. The arc surface can fit well with the outer wall of the roll, increasing the clamping friction between the fixed clamping claw and the auxiliary clamping claw 601 and the roll.

[0022] Reference Figures 3-5 As shown in this embodiment: the outer wall of the fixed column 3 is provided with a lifting groove that matches the sliding seat 303, and the inner wall of the movable column 4 is provided with a limiting groove that matches the lifting slide 403. The limiting groove is provided with a telescopic space that matches the telescopic frame 404. The limiting groove and the telescopic space facilitate the lifting slide 403 to slide up and down, thereby driving the telescopic frame 404 to slide and extend. The telescopic frame 404 moves, causing the fixed clamp 5 and the auxiliary support 6 to move and extend on the outer wall of the movable column 4. At the same time, the movable column 4 slides stably up and down on the outer wall of the fixed column 3 through the sliding seat 303, so that the movable column 4 will not deviate or shake.

[0023] Working principle: The user starts the second motor 401, which drives the second threaded rod 402 to rotate. The rotation of the second threaded rod 402 causes the lifting slide 403 to move. The upward movement of the lifting slide 403 causes the telescopic frame 404 to move upward. The movement of the telescopic frame 404 pulls the fixed clamping part 5 and the auxiliary support 6 towards the inner wall of the moving column 4 through the bearing. The fixed clamping part 5 and the auxiliary support 6 move closer to each other, thus clamping and fixing the outer wall of the roll. By starting the first motor 301, the first threaded rod 302 is rotated. The rotation of the first threaded rod 302 causes the sliding part 303 to move. The movement of the sliding part 303 causes the moving column 4 to move upward. The moving column 4 then drives the roll to move through the fixed clamping part 5 and the auxiliary support 6. Finally, the moving seat 101 moves horizontally on the gantry crane 1, thus moving the roll to the top of the pit furnace 2, completing the roll hoisting operation. Simultaneously, as the moving column 4 moves the fixed clamping member 5 and the auxiliary support 6 upward, the roll will slightly sink between the fixed clamping member 5 and the auxiliary support 6 due to its own weight. This causes the bottom end of the roll to contact and press against the top rod 501 at the top of the fixed clamping member 5. The top rod 501 is then forced to push the support plate 502 to compress the support spring 504, causing it to contract and move. The movement of the support plate 502 causes the limiting seat 503 to move out of the fixed clamping member 5. The limiting seat 503 then fits against the inner wall of the moving column 4, causing the conical tooth block and the conical groove to approach and mesh with each other. The fixed clamping component 5 is fixed and locked on the inner wall of the moving column 4, which avoids the risk of the fixed clamping component 5 moving during the hoisting process due to the accidental contact of the controller by the staff, and thus the risk of the clamping component 5 loosening and falling off the roll. At the same time, the auxiliary claw 601 on the auxiliary support 6 is pushed by the high temperature resistant telescopic spring 602 to fit tightly against the outer wall of the top of the roll. The fixed clamping component 5 and the auxiliary claw 601 can prevent the roll from shifting or shaking when it is hoisted to the pit furnace 2, so as not to cause the roll to collide with the furnace wall or cause uneven heating.

[0024] Working principle: After the user operates the moving seat 101 to move the roller to the top of the pit furnace 2, the user starts the first motor 301 to rotate in the reverse direction, causing the first threaded rod 302 to reverse and drive the sliding seat 303 to move downward. This allows the moving column 4 to move the roller into the pit furnace 2 through the fixed clamping part 5 and the auxiliary clamp 601. After the roller is aligned and limited by the positioning groove at the bottom of the pit furnace 2, the moving column 4 continues to move, causing the top of the fixed clamping part 5 to move away from the bottom of the roller, thus releasing the pressure on the top rod 501. The support spring 504 then resets, pushing the support plate 502 to move the limiting seat 503, so that the limiting seat 503 and the moving column... 4. After the inner wall is separated, the position lock of the fixed clamping component 5 is released. The operator can then start the second motor 401 to drive the second threaded rod 402 to reverse, causing the lifting slide 403 to slide downward and drive the telescopic frame 404 to move. The movement of the telescopic frame 404 pushes the fixed clamping component 5 and the auxiliary gripper 601 to extend from the outer wall of the moving column 4, so that the fixed clamping component 5 and the auxiliary gripper 601 are away from the outer wall of the roll, releasing the clamping and fixing of the roll. Finally, start the first motor 301 to drive the first threaded rod 302 to rotate forward, so that the sliding seat 303 moves upward and drives the moving column 4 to move out of the pit furnace 2, thereby completing the hoisting work of the roll.

[0025] The technical scope of this utility model is not limited to the content described above. Those skilled in the art can make various modifications and variations to the above embodiments without departing from the technical concept of this utility model, and all such modifications and variations should fall within the protection scope of this utility model.

Claims

1. A hoisting device for tempering rolls in a pit furnace, characterized in that, The system includes a gantry crane (1), a movable seat (101) is slidably connected to the top of the gantry crane (1), a pit furnace (2) is placed below the gantry crane (1), a fixed column (3) is fixed to the bottom of the movable seat (101), a movable column (4) is provided on the outer wall of the fixed column (3), and a fixed clamp (5) and an auxiliary support (6) are slidably connected to the outer wall of the movable column (4). A top rod (501) is slidably connected to the top of the outer wall of the fixed clamping member (5) and extends into the interior of the fixed clamping member (5). A support plate (502) is fixed to the bottom end of the top rod (501) and slides inside the fixed clamping member (5). A limit seat (503) is fixed to the bottom end of the support plate (502) and fits against the inner wall of the moving column (4). A support spring (504) is fixed between the bottom end of the support plate (502) and the inner wall of the fixed clamping member (5). The auxiliary support (6) has an auxiliary gripper (601) that slides on its outer wall and is clamped and fitted to the outer wall of the roll. A high-temperature resistant telescopic spring (602) is fixed between the auxiliary gripper (601) and the auxiliary support (6).

2. The hoisting device for the tempering rolls of a pit furnace according to claim 1, characterized in that: A motor (301) is fixed inside the movable seat (101). A threaded rod (302) is fixed at the output end of the motor (301) and is rotatably connected to the inside of the fixed column (3). A sliding seat (303) is sleeved and slidably attached to the outer wall of the threaded rod (302), and the sliding seat (303) is fixedly connected to the outer wall of the movable column (4).

3. The hoisting device for the tempering rolls of a pit furnace according to claim 1, characterized in that: The top of the moving column (4) is fixed with a No. 2 motor (401), and the output end of the No. 2 motor (401) is fixed with a No. 2 threaded rod (402), which is rotatably connected to the inside of the moving column (4). Multiple lifting slides (403) are slidably sleeved on the outer wall of the No. 2 threaded rod (402). The two sides of the multiple lifting slides (403) are rotatably connected to a telescopic frame (404) through bearings, and the other side of the telescopic frame (404) is rotatably connected to the outer wall of the fixed clamp (5) and the auxiliary support (6).

4. The hoisting device for the tempering rolls of a pit furnace according to claim 1, characterized in that: The top of the pit furnace (2) is provided with a feed port that allows the movable column (4), the fixed clamp (5), and the auxiliary support (6) to enter and exit. The fixed clamp (5) has a support groove inside that matches the support plate (502). The outer wall of the movable column (4) is provided with a sliding groove that matches the fixed clamp (5) and the auxiliary support (6). The bottom of the limiting seat (503) is provided with multiple conical teeth, and the top of the sliding groove is provided with a conical groove that meshes with the conical teeth.

5. The hoisting device for the tempering rolls of a pit furnace according to claim 1, characterized in that: The fixed clamping component (5) includes a connecting bracket and a fixed clamping claw. The fixed clamping claw and the auxiliary clamping claw (601) are made of ZG40Cr25Ni20 heat-resistant steel. The inner arc surface is inlaid with a bead-shaped heat insulation sleeve. The inner arc surface is the contact working surface. The inner arc surface of the auxiliary clamping claw (601) is provided with multiple raised lines.

6. The hoisting device for the tempering rolls of a pit furnace according to claim 3, characterized in that: The outer wall of the fixed column (3) is provided with a lifting groove that matches the sliding seat (303), and the inner wall of the movable column (4) is provided with a limiting groove that matches the lifting slide seat (403), and the limiting groove is provided with a telescopic space that matches the telescopic frame (404).

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