Lifting device for super calender

Abstract

The application discloses a lifting device for a super calender, which comprises a stand, a lifting platform, a sliding mechanism, a driving mechanism and a balancing mechanism, wherein the stand comprises a stand a and a stand b, the stand a and the stand b are symmetrically arranged, the lifting platform is arranged between the stand a and the stand b, and the sliding mechanism, the driving mechanism and the balancing mechanism are arranged between the lifting platform and the stand a and the stand b. The driving mechanism and the balancing mechanism are arranged, so that the lifting platform can be quickly started and stopped and smoothly run, the phenomenon that the lifting platform is inclined and unstable during operation can be effectively solved, and the balancing mechanism also plays a role in protecting the lifting platform.

Description

Technical Field

[0001] This invention belongs to the field of papermaking auxiliary equipment technology, specifically relating to a lifting device for a supercalender. Background Technology

[0002] To achieve a higher degree of smoothness in paper sheets, they are typically processed using a supercalender. Supercalenders are generally quite tall, making operation and maintenance inconvenient. Incorporating a movable lifting platform can solve these problems.

[0003] Supercalenders typically consist of a dozen or so pressure rollers, guide rollers connected in series, and auxiliary equipment. Their overall height is relatively high, making operation inconvenient for workers. Therefore, a movable platform that can be raised and lowered is needed for maintenance, inspection, and paper feeding. This platform requires a drive unit, limit devices, and safety protection devices. Currently, most commercially available lifting platforms use a hydraulic or pneumatic cylinder to pull a steel cable, the other end of which is fixed to the platform. A fixed pulley at the top guides the cable, and the hydraulic pressure drives the platform's movement. While this method is simple and easy to maintain, it lacks safety. The response time is slow; the hydraulic oil takes a long time to travel from the oil station to the high-pressure chamber of the cylinder, making it unsuitable for urgent on-site operations. Furthermore, the lack of safety devices often leads to platform instability due to pressure fluctuations during operation. Summary of the Invention

[0004] The technical problem to be solved by the present invention is: how to operate the lifting platform quickly and safely when maintaining a supercalender, and how to stop it quickly and accurately at the required position while playing a safety protection role. In order to solve the above problem, a lifting device for a supercalender is provided.

[0005] To solve the above-mentioned technical problems, the technical solution of the present invention is implemented in the following manner: A lifting device for a supercalender includes a column, a lifting platform, a sliding mechanism, a driving mechanism, and a balancing mechanism. The column includes column a and column b, which are symmetrically arranged. A lifting platform is arranged between column a and column b. A sliding mechanism, a driving mechanism, and a balancing mechanism are arranged between the lifting platform and column a and column b. The drive mechanism includes a reducer, which is fixedly connected to the bottom of the lifting platform. A drive sprocket is installed on the output shaft of the reducer. A sprocket frame is installed on the reducer, and a first guide sprocket and a second guide sprocket are installed on the sprocket frame. One end of a chain is fixedly connected to the top of the column b, and the other end of the chain is fixedly connected to the bottom of the column b. The chain passes under the first guide sprocket from top to bottom, then passes over the drive sprocket and then under the drive sprocket, then passes over the second guide sprocket and then goes down. The drive mechanism between the lifting platform and the column a is symmetrically arranged with the drive mechanism between the lifting platform and the column b. The balancing mechanism includes fixed pulleys a, b, c, and d, wire rope a, and wire rope b. Fixed pulley a is fixedly connected to the bottom end of column a, fixed pulley d is fixedly connected to the bottom end of column b, fixed pulley b is fixedly connected to one bottom end of the lifting platform, and fixed pulley c is fixedly connected to the other bottom end of the lifting platform. One end of wire rope a is fixedly connected to the top end of column a, and the other end of wire rope a is fixedly connected to the bottom end of column b. Wire rope a passes under fixed pulley b from top to bottom, then passes over fixed pulley c from top to bottom, and then passes under fixed pulley d from bottom to top and is fixedly connected to column b. One end of wire rope b is fixedly connected to the top end of column b, and the other end of wire rope b is fixedly connected to the bottom end of column a. Wire rope b passes under fixed pulley c from top to bottom, then passes over fixed pulley b from top to bottom, and then passes under fixed pulley a from bottom to top and is fixedly connected to column a.

[0006] Both column a and column b are equipped with chain tensioning devices. One end of the chain tensioning device is fixedly connected to the top of column a or column b, and the other end of the chain tensioning device is fixedly connected to one end of the chain.

[0007] A rope tensioning device a is installed on the column a. One end of the rope tensioning device a is fixedly connected to the bottom end of the column a, and the other end of the rope tensioning device a is fixedly connected to the other end of the wire rope b. A rope tensioning device b is installed on the column b. One end of the rope tensioning device b is fixedly connected to the bottom end of the column b, and the other end of the rope tensioning device b is fixedly connected to the other end of the wire rope a.

[0008] A sliding chain pressing device is provided on the sprocket frame.

[0009] The sliding mechanism includes a guide plate, which is fixedly connected to the column. Limiting wheels are provided on the sides of the lifting platform. The limiting wheels are symmetrically arranged on both sides of the guide plate, and the radial surface of the limiting wheels is perpendicular to the guide plate.

[0010] Compared with the prior art, the present invention has the following advantages: By setting up a drive mechanism and a balancing mechanism, the present invention can ensure that the lifting platform can start and stop quickly and operate smoothly, which can effectively solve the problems of tilting and instability that occur during the operation of the lifting platform. At the same time, the balancing mechanism also plays a role in protecting the lifting platform. Attached Figure Description

[0011] Figure 1 This is the main view of the lifting platform.

[0012] Figure 2 yes Figure 1 A-direction view.

[0013] Figure 3 yes Figure 1 View B.

[0014] Figure 4 This is the main view of the drive mechanism.

[0015] Figure 5 This is a top view of the drive mechanism.

[0016] Figure 6 This is a diagram showing the working shape of the chain.

[0017] Figure 7 This is the front view of the balancing mechanism.

[0018] Figure 8 This is a schematic diagram of a rope tensioning device.

[0019] Figure 9 This is a simplified diagram showing the routes of wire ropes a and b.

[0020] Figure 10 This is a simplified diagram of the route of wire rope a.

[0021] Figure 11 This is a simplified diagram of the route of wire rope b.

[0022] Figure 12 This is a schematic diagram of the sliding mechanism.

[0023] Figure 13 yes Figure 12 Top view.

[0024] Wherein, 1 is column a; 2 is chain; 3 is lifting platform; 4 is rope tensioning device a; 5 is fixed pulley a; 6 is first guide sprocket; 7 is second guide sprocket; 8 is sliding chain pressing device; 9 is sprocket frame; 10 is reducer; 11 is wire rope a; 12 is wire rope b; 13 is column b; 14 is fixed pulley d; 15 is drive sprocket; 16 is fixed pulley b; 17 is fixed pulley c; 18 is column; 19 is limit wheel; 20 is guide plate; 21 is rope tensioning device b. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this invention, not all of them. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this invention. Therefore, the following detailed description of the embodiments of this invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention.

[0026] The present invention will now be further described in conjunction with the embodiments and accompanying drawings: As shown in the figure, a lifting device for a supercalender includes a column 18, a lifting platform 3, a sliding mechanism, a driving mechanism, and a balancing mechanism. The column 18 includes a column a1 and a column b13, which are symmetrically arranged. The lifting platform 3 is arranged between the columns a1 and b13. The sliding mechanism, the driving mechanism, and the balancing mechanism are arranged between the lifting platform 3 and the columns a1 and b13.

[0027] The drive mechanism includes a reducer 10, which is fixedly connected to the bottom of the lifting platform 3. A drive sprocket 15 is mounted on the output shaft of the reducer 10. A sprocket frame 9 is mounted on the reducer 10, and a first guide sprocket 6 and a second guide sprocket 7 are mounted on the sprocket frame 9. One end of a chain 2 is fixedly connected to the top of the column b13, and the other end of the chain 2 is fixedly connected to the bottom of the column b13. The chain 2 passes under the first guide sprocket 6 from top to bottom, then passes over the drive sprocket 15 and then under it, then passes over the second guide sprocket 7 and then downwards. The drive mechanism between the lifting platform 3 and the column a1 is symmetrically arranged with the drive mechanism between the lifting platform 3 and the column b13. By setting drive mechanisms on both sides of the lifting platform 3, the stable lifting of the lifting platform 3 is achieved, resulting in a smooth, safe, and precise stopping position for the lifting platform 3.

[0028] The balancing mechanism includes fixed pulleys a5, b16, c17, and d14, and wire ropes a11 and b12. The fixed heights of fixed pulleys b16 and c17 are higher than those of fixed pulleys a5 and d14. Fixed pulley a5 is fixedly connected to the bottom end of column a1, fixed pulley d14 is fixedly connected to the bottom end of column b13, fixed pulley b16 is fixedly connected to one bottom end of the lifting platform 3, fixed pulley c17 is fixedly connected to the other bottom end of the lifting platform 3, one end of wire rope a11 is fixedly connected to the top end of column a1, and the other end of wire rope a11 is fixedly connected to the bottom end of column b13. Wire rope a11 runs from top to bottom, passing under fixed pulley b16, then over fixed pulley c17, and finally over fixed pulley d14, then upwards and is fixedly connected to column b13. This forms a closed loop of chain 2, which is similar to an "Ω" shape.

[0029] One end of wire rope b12 is fixedly connected to the top of column b13, and the other end of wire rope b12 is fixedly connected to the bottom of column a1. Wire rope b12 passes under fixed pulley c17 from top to bottom, then passes over fixed pulley b16 from top to bottom, and finally passes under fixed pulley a5 from bottom to top and is fixedly connected to column a1. This forms a closed loop of chain 2, similar to an "Ω" shape.

[0030] The parallel connection of wire ropes a11 and b12 forms the balancing mechanism of this application, which can assist in the lifting platform 3 to rise or fall. Wire ropes a11 and b12 always maintain such a loop state, so that even if the power of the driving mechanism of the lifting platform 3 is suddenly lost, the lifting platform 3 will not fall rapidly or tilt. The balancing mechanism of this application also has the function of ensuring the safe use of the lifting platform 3 and providing secondary protection.

[0031] Both column a1 and column b13 are equipped with chain tensioning devices. One end of the chain tensioning device is fixedly connected to the top of column a1 or column b13, and the other end is fixedly connected to one end of chain 2. Because both column a1 and column b13 are equipped with chain tensioning devices, one end of the chain tensioning device on column a1 needs to be fixedly connected to the top of column a1, and similarly, one end of the chain tensioning device on column b13 also needs to be fixedly connected to the top of column b13.

[0032] A rope tensioning device a4 is installed on column a1. One end of the rope tensioning device a4 is fixedly connected to the bottom end of column a1, and the other end of the rope tensioning device a4 is fixedly connected to the other end of wire rope b12. A rope tensioning device b21 is installed on column b13. One end of the rope tensioning device b21 is fixedly connected to the bottom end of column b13, and the other end of the rope tensioning device b21 is fixedly connected to the other end of wire rope a11.

[0033] A sliding chain pressing device 8 is provided on the sprocket frame 9. After the chain 2 passes under the first guide sprocket 6, it needs to pass under the sliding chain pressing device 8 again, and then pass under the drive sprocket 15 from above, and then pass under the drive sprocket 15. After that, it passes under the second guide sprocket 7 from above and then goes down.

[0034] The sliding mechanism includes a guide plate 20, which is fixedly connected to the column 18. Limiting wheels 19 are symmetrically arranged on both sides of the lifting platform 3, with their radial surfaces perpendicular to the guide plate 20. The column 18 has specially treated guide plates 20 as sliding tracks. The lifting platform 3 and the guide plates 20 are connected by sliding mechanisms fixed to both sides of the lifting platform 3. These sliding mechanisms provide both sliding and guiding functions, ensuring that the lifting platform 3 does not shift during operation and allowing for safe and stable operation.

[0035] The above description is only a preferred embodiment of the present invention. It should be noted that those skilled in the art can make several changes and improvements without departing from the overall concept of the present invention, and these should also be considered within the scope of protection of the present invention.

Claims

1. A lifting device for a supercalender, comprising a column (18), a lifting platform (3), a sliding mechanism, a driving mechanism, and a balancing mechanism, characterized in that, The column (18) includes column a (1) and column b (13), which are symmetrically arranged. A lifting platform (3) is arranged between column a (1) and column b (13). A sliding mechanism, a driving mechanism and a balancing mechanism are arranged between the lifting platform (3) and column a (1) and column b (13). The drive mechanism includes a reducer (10), which is fixedly connected to the bottom of the lifting platform (3). A drive sprocket (15) is provided on the output shaft of the reducer (10). A sprocket frame (9) is provided on the reducer (10). A first guide sprocket (6) and a second guide sprocket (7) are provided on the sprocket frame (9). One end of a chain (2) is fixedly connected to the top of the column b (13), and the other end of the chain (2) is fixedly connected to the bottom of the column b (13). The chain (2) passes under the first guide sprocket (6) from top to bottom, then passes under the drive sprocket (15) from the top to the bottom of the drive sprocket (15), and then passes under the second guide sprocket (7) from the top and then downward. The drive mechanism between the lifting platform (3) and the column a (1) is symmetrically arranged with respect to the drive mechanism between the lifting platform (3) and the column b (13). The balancing mechanism includes fixed pulley a (5), fixed pulley b (16), fixed pulley c (17), fixed pulley d (14), wire rope a (11), and wire rope b (12). Fixed pulley a (5) is fixedly connected to the bottom end of column a (1), fixed pulley d (14) is fixedly connected to the bottom end of column b (13), fixed pulley b (16) is fixedly connected to one bottom end of the lifting platform (3), and fixed pulley c (17) is fixedly connected to the other bottom end of the lifting platform (3). One end of wire rope a (11) is fixedly connected to the top end of column a (1), and the other end of wire rope a (11) is fixedly connected to the bottom end of column b (13). At the bottom, the wire rope a (11) passes under the fixed pulley b (16) from top to bottom, then passes under the fixed pulley c (17) from top to bottom, and then passes under the fixed pulley d (14) from bottom to top and is fixedly connected to the column b (13). One end of the wire rope b (12) is fixedly connected to the top of the column b (13), and the other end of the wire rope b (12) is fixedly connected to the bottom of the column a (1). The wire rope b (12) passes under the fixed pulley c (17) from top to bottom, then passes under the fixed pulley b (16) from top to bottom, and then passes under the fixed pulley a (5) from bottom to top and is fixedly connected to the column a (1). Both the column a (1) and the column b (13) are equipped with chain tensioning devices. One end of the chain tensioning device is fixedly connected to the top of the column a (1) or the column b (13), and the other end of the chain tensioning device is fixedly connected to one end of the chain (2). A rope tensioning device a (4) is provided on the column a (1). One end of the rope tensioning device a (4) is fixedly connected to the bottom end of the column a (1), and the other end of the rope tensioning device a (4) is fixedly connected to the other end of the wire rope b (12). A rope tensioning device b (21) is provided on the column b (13). One end of the rope tensioning device b (21) is fixedly connected to the bottom end of the column b (13), and the other end of the rope tensioning device b (21) is fixedly connected to the other end of the wire rope a (11). A sliding chain pressing device (8) is provided on the sprocket frame (9); By setting up a drive mechanism and a balancing mechanism, the lifting platform can be started and stopped quickly and run smoothly, effectively solving the problem of tilting and instability during operation. At the same time, the balancing mechanism also plays a role in protecting the lifting platform.

2. A lifting device for a supercalender according to claim 1, characterized in that, The sliding mechanism includes a guide plate (20), which is fixedly connected to the column (18). Limiting wheels (19) are provided on both sides of the lifting platform (3). The limiting wheels (19) are symmetrically arranged on both sides of the guide plate (20). The radial surface of the limiting wheel (19) is perpendicular to the guide plate (20).

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