Auxiliary device for replacing slewing bearing of unloader of bleaching tower

Abstract

The utility model belongs to the field of bleaching tower discharger slewing bearing replacement auxiliary equipment, and particularly relates to a bleaching tower discharger slewing bearing replacement auxiliary device which comprises a top seat, a lead screw and a base which are arranged in parallel from top to bottom, one end of the lead screw is connected with a rotation driving structure, and the lead screw is provided with a positive screw and a negative screw. The right-hand screw and the left-hand screw are connected with moving nuts, the front side wall and the rear side wall of each moving nut are hinged to an upper swing arm and a lower swing arm through a middle pin shaft, the other end of each upper swing arm is hinged to a top seat through an upper pin shaft, the top seat is provided with an upper connecting assembly, and the other end of each lower swing arm is hinged to a base through a lower pin shaft. And a lower connecting assembly is arranged on the base. The flange plate can be driven to move upwards to be separated from the pivotal bearing by controlling the rotation driving structure to act, and operation is easy and convenient; in addition, workers do not need to enter the tower shell in the whole operation process, and therefore the slewing bearing can be replaced under the condition that the machine is not stopped.

Description

Technical Field

[0001] The utility model relates to an auxiliary device for replacing a slewing bearing of a bleaching tower discharger, belonging to the field of auxiliary equipment for replacing a slewing bearing of a bleaching tower discharger. Background Art

[0002] The chemi-thermomechanical pulp (CTMP) process is a process for producing papermaking pulp. This process combines chemical treatment and mechanical refining. First, through mild pretreatment (such as impregnation or cooking), part of the hemicellulose in the wood chips is removed to soften the wood chips, and then through a disc refiner for post-treatment, the softened wood chips are refined to separate the fibers into pulp. In the production of the CTMP process, the discharger of its bleaching tower is mostly a discharge screw type, and is equipped with a planetary gearbox to drive the scraper assembly on the slewing bearing to scrape the slurry in the tower shell, so that the slurry is discharged evenly and prevent the slurry from accumulating. During the production process, sometimes the slewing bearing is damaged, and it is necessary to replace the slewing bearing.

[0003] In the prior art, the method for replacing the slewing bearing is as Figure 4 shown. After removing the connecting bolts 20 between the flange 19 and the slewing bearing 21, a chain block 23 is used to lift the scraper assembly 17 inside the tower shell 16. The rise of the scraper assembly 17 can drive the flange 19 to rise and separate from the slewing bearing 21 through the main shaft 18, and then the slewing bearing 21 can be taken out from the mounting seat 22 for replacement. The above operation process requires maintenance personnel to enter the tower shell 16 for operation, which is not only inconvenient to operate, but also requires the shutdown of the whole set of equipment, reducing the equipment production capacity. Summary of the Utility Model

[0004] According to the above deficiencies in the prior art, the technical problem to be solved by the utility model is to provide an auxiliary device for replacing a slewing bearing of a bleaching tower discharger that can lift the flange without workers entering the tower shell.

[0005] The auxiliary device for replacing a slewing bearing of a bleaching tower discharger described in the utility model includes a top seat, a lead screw, and a base that are arranged in parallel from top to bottom. One end of the lead screw is connected with a rotary driving structure. The lead screw is provided with a positive helix and a negative helix, and moving nuts are connected to both the positive helix and the negative helix. Upper swing arms and lower swing arms are hinged to the front and rear side walls of the two moving nuts through middle pin shafts. The other ends of the upper swing arms are hinged to the top seat through upper pin shafts, and an upper connection component is arranged on the top seat. The other ends of the lower swing arms are hinged to the base through lower pin shafts, and a lower connection component is arranged on the base.

[0006] Principle and Process of Action:

[0007] During use, the top seat is installed at the bottom of the tower shell through the upper connection component, and the base seat is installed on the flange through the lower connection component. By driving the screw rod to rotate through the rotary drive structure, under the action of the positive helix and the reverse helix, the two moving nuts can be driven to move in opposite directions, so as to drive the relative movement of the top seat and the base seat under the action of the upper swing arm and the lower swing arm. Since the tower shell is a static point, the base seat moves upward, thus driving the flange to move upward, realizing the separation from the slewing bearing, and the slewing bearing can be taken out from the mounting seat for replacement.

[0008] Furthermore, the upper connection component is an upper mounting hole penetrating through the left and right ends of the top seat.

[0009] Furthermore, the lower connection component is a lower mounting hole penetrating through the left and right ends of the base seat.

[0010] Furthermore, the base seat is U-shaped, and ear seats are provided at both the left and right ends of the base seat, and the lower swing arm is hinged to the ear seats.

[0011] Furthermore, the rotary drive structure is a handle penetrating through the screw rod.

[0012] Furthermore, the handle is arranged at the right end of the screw rod, and a limit block is arranged at the left end of the screw rod.

[0013] The beneficial effects of the present utility model compared with the prior art are as follows:

[0014] For the auxiliary device for replacing the slewing bearing of the bleaching tower discharger of the present utility model, by controlling the action of the rotary drive structure to drive the screw rod to rotate, the flange can be driven to move upward to separate from the slewing bearing, and the operation is simple and convenient; moreover, during the whole operation process, workers do not need to enter the tower shell, so the replacement operation of the slewing bearing can be carried out without stopping the machine, effectively ensuring the production capacity of the equipment. Description of the Drawings

[0015] Figure 1 is the front view of the present utility model;

[0016] Figure 2 is the right view of the present utility model;

[0017] Figure 3 is the structural schematic diagram of the present utility model during use;

[0018] Figure 4 is the structural schematic diagram of the prior art during use.

[0019] In the figure: 1. Lower mounting hole; 2. Base; 3. Lower pin shaft; 4. Ear seat; 5. Lower swing arm; 6. Handle; 7. Lead screw; 8. Moving nut; 9. Middle pin shaft; 10. Upper swing arm; 11. Positive helix; 12. Reverse helix; 13. Upper pin shaft; 14. Top seat; 15. Upper mounting hole; 16. Tower shell; 17. Scraper assembly; 18. Main shaft; 19. Flange; 20. Connecting bolt; 21. Slewing bearing; 22. Mounting seat; 23. Chain block; 24. Limit block.

[0020] Figure 3 , Figure 4 The arrow in the figure indicates the moving direction of the flange. Specific implementation mode

[0021] The following further describes the embodiments of the present utility model in conjunction with the accompanying drawings:

[0022] Embodiment 1:

[0023] As Figure 1 , Figure 2 shown, the auxiliary device for replacing the slewing bearing of the bleaching tower discharger described in the present utility model includes a top seat 14, a lead screw 7 and a base 2 arranged in parallel from top to bottom. One end of the lead screw 7 is connected with a rotary driving structure. The lead screw 7 is provided with a positive helix 11 and a reverse helix 12. Moving nuts 8 are connected to both the positive helix 11 and the reverse helix 12. Upper swing arms 10 and lower swing arms 5 are hinged to the front and rear side walls of the two moving nuts 8 through middle pin shafts 9 respectively. The other ends of the upper swing arms 10 are hinged to the top seat 14 through upper pin shafts 13. An upper connecting component is arranged on the top seat 14. The other ends of the lower swing arms 5 are hinged to the base 2 through lower pin shafts 3. A lower connecting component is arranged on the base 2.

[0024] During use, as Figure 3 shown, two such devices are used for cooperation. The two devices are respectively installed on the left and right sides of the main shaft 18. The top seat 14 of the device is installed at the bottom of the tower shell 16 through the upper connecting component, and the base 2 is installed on the flange 19 through the lower connecting component. The lead screw 7 is driven to rotate through the rotary driving structure. Under the action of the positive helix 11 and the reverse helix 12, the two moving nuts 8 can be driven to move in opposite directions, so as to drive the top seat 14 and the base 2 to move relatively under the action of the upper swing arms 10 and the lower swing arms 5. Since the tower shell 16 is a static point, the base 2 moves upward, thereby driving the flange 19 to move upward, realizing the separation from the slewing bearing 21, so that the slewing bearing 21 can be taken out from the mounting seat 22 for replacement.

[0025] The auxiliary device for replacing the slewing bearing of the bleaching tower discharger described in the utility model can drive the screw rod 7 to rotate by controlling the action of the rotary drive structure, and then drive the flange 19 to move upward to disengage from the slewing bearing 21. The operation is simple and convenient. Moreover, during the whole operation process, workers do not need to enter the tower shell 16, so the replacement operation of the slewing bearing 21 can be carried out without stopping the machine, effectively ensuring the equipment production capacity.

[0026] Embodiment 2:

[0027] As Figures 1 to 3 shown, on the basis of Embodiment 1,

[0028] Furthermore, the upper connection component is the upper mounting holes 15 penetrating through the left and right ends of the top seat 14. During use, screws corresponding to the upper mounting holes 15 are pre-welded at the bottom of the tower shell 16, and then the fixed connection between the top seat 14 and the tower shell 16 can be realized by equipping nuts.

[0029] Furthermore, the lower connection component is the lower mounting holes 1 penetrating through the left and right ends of the base 2. During use, screws corresponding to the lower mounting holes 1 are pre-welded at the top of the flange 19, and then the fixed connection between the flange 19 and the base 2 can be realized by equipping nuts.

[0030] Furthermore, the base 2 is U-shaped, and ear seats 4 are provided at both the left and right ends of the base 2. The lower swing arm 5 is hinged to the ear seats 4.

[0031] Furthermore, the rotary drive structure is the handle 6 penetrating through the screw rod 7, with a simple structure and convenient operation.

[0032] Furthermore, the handle 6 is arranged at the right end of the screw rod 7, and a limit block 24 is provided at the left end of the screw rod 7, which can prevent the moving nut 8 from disengaging from the screw rod 7 and plays a protective role.

[0033] It should be specifically noted that in the description of the present utility model, the orientation or positional relationship indicated by the terms "left", "right", "upper", "lower", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model rather than requiring the present utility model to be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model.

Claims

1. A bleaching tower discharger rotary bearing replacement auxiliary device, characterized in that: The invention comprises a top seat (14), a screw rod (7) and a base (2) which are arranged in parallel from top to bottom, one end of the screw rod (7) is connected to a rotation driving structure, a positive screw (11) and a negative screw (12) are arranged on the screw rod (7), and a movable nut (8) is connected to the positive screw (11) and the negative screw (12), and an upper swing arm (10) and a lower swing arm (5) are hingedly connected on the front and rear side walls of the two movable nuts (8) through a middle pin shaft (9), the other end of each upper swing arm (10) is hingedly connected to the top seat (14) through an upper pin shaft (13), an upper connecting assembly is arranged on the top seat (14), the other end of each lower swing arm (5) is hingedly connected to the base (2) through a lower pin shaft (3), and a lower connecting assembly is arranged on the base (2).

2. The bleaching tower discharger rotary bearing replacement auxiliary device according to claim 1 is characterized in that: The upper connection component is an upper mounting hole (15) which is arranged through the left and right ends of the top seat (14).

3. The bleaching tower discharger rotary bearing replacement auxiliary device according to claim 1 is characterized in that: The lower connection component is a lower mounting hole (1) which is arranged through the left and right ends of the base (2).

4. The bleaching tower discharger rotary bearing replacement auxiliary device according to claim 1 is characterized in that: The base (2) is U-shaped, and ear seats (4) are provided at both the left and right ends of the base (2), and the lower swing arm (5) is hinged on the ear seats (4).

5. The bleaching tower discharger rotary bearing replacement auxiliary device according to any one of claims 1 to 4, characterized in that: The rotary drive structure is a handle (6) that is arranged through the screw rod (7).

6. The bleaching tower discharger rotary bearing replacement auxiliary device according to claim 5, characterized in that: The handle (6) is arranged at the right end of the screw rod (7), and a limit block (24) is arranged at the left end of the screw rod (7).

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