A papermaking cantilever beam magnetic suspension device

Abstract

A papermaking cantilever beam magnetic suspension device relates to paper machine technical field, including electromagnet installed on upper cantilever beam and lower cantilever beam, and detachable support device and detachable guide rail frame that cooperate with each other;Detachable support device includes moving frame, support plate that is intermittently pressed against upper cantilever beam and is slidably installed on moving frame, upper clamping rod that is intermittently clamped to upper cantilever beam and is rotatably installed on support plate, and lower clamping rod that is intermittently clamped to lower cantilever beam and is rotatably installed on moving frame;Guiding roller is rotatably installed on moving frame;Detachable guide rail frame includes mounting frame, guide rail that is fixedly installed on mounting frame, vacuum chuck that is slidably installed on mounting frame and is intermittently adsorbed to lower cantilever beam, and guiding drive rod that is installed on mounting frame and is intermittently driven to move guiding roller;Guiding roller is intermittently entered into guide rail;Detachable support device and detachable guide rail frame are all made of non-magnetic material.

Description

Technical Field

[0001] This invention relates to the field of paper machine technology, and in particular to a magnetic levitation device for a papermaking cantilever beam. Background Technology

[0002] In current large paper machine structures, the forming wire or felt is usually installed inside the frame. Due to the obstruction of the upright frame, when the operator needs to replace the forming wire or felt, the current procedure is as follows: the operator uses jacks or other support mechanisms to support the two cantilever beams, removes the support block placed on one side of the upright frame, and then resets the jacks or other support mechanisms and removes them. The cantilever beams are in a balanced state under the action of the tie rod and the other side of the upright frame. Then the operator replaces the forming wire or felt through the gap where the support block was placed.

[0003] However, the above operation has the following drawbacks: 1. Before operators can replace the forming net or felt, they need to manually remove the support blocks. The replacement of the forming net or felt requires the removal of multiple support blocks simultaneously. This not only greatly reduces work efficiency but also increases the labor intensity and risk factor for operators. 2. Currently, this type of cantilever beam structure is prone to bending deformation and twisting when the frame is pulled up. In order to meet the rigidity of the cantilever beam, it is necessary to increase the external dimensions of the cantilever beam and the thickness of the panel steel plate. This will result in the entire frame being too heavy and wasting materials.

[0004] Comparative document 1: Chinese utility model patent with patent number 202221680401.2 and titled "A Paper Machine Structure with Cantilever Beam Blanket Changing," discloses the following solution: It includes a paper machine body and a cantilever beam support assembly. The paper machine body is mounted on the cantilever beam support assembly, which includes a first column and a second column fixed to the ground, a first cantilever beam frame mounted on the first column, and a second cantilever beam frame mounted on the upper end of the first cantilever beam frame. The second column has a first pull-out block and a second pull-out block on both its upper and lower sides for changing blankets. When changing blankets, because the cantilever beam structure's pressing frame has a tie rod as a locking fulcrum, the two pull-out blocks on the cantilever beam frame can be directly removed without affecting the entire pressing frame. The blanket can be quickly pulled out and in through these two gaps, which is very convenient. A skilled operator can complete the entire blanket changing work in about two hours, improving work efficiency.

[0005] Comparative document 2: Chinese utility model patent with patent number 202120744771.7 and title "A Cantilever Beam Frame" discloses the following solution: It includes a beam frame, the side walls of which are provided with several first and second reinforcing ribs, one end of which has a tie rod hole, and both the top and bottom ends of which are provided with reinforcement components. The beam frame has an internal reinforcement assembly, which includes a reinforcement cylinder, a support bar, and a mounting column. In the technical solution provided by this utility model, the beam frame is reinforced by the first and second reinforcing ribs on its side walls, and simultaneously by the reinforcement components. Then, by installing the reinforcement assembly inside the beam frame, the internal strength of the beam frame is improved, thereby increasing the rigidity of the cantilever beam frame, preventing torsional deformation, extending the service life of the cantilever beam, and also improving the stability of the paper machine, meeting the requirements of high-speed paper machines.

[0006] However, neither comparison file 1 nor comparison file 2 resolved the following issue: 1. Manually remove the support block before replacing the forming mesh or felt; 2. The cantilever beam needs to be in a balanced state under the action of the tie rod and the other side column frame, which cannot solve the problem of the excessive size of the cantilever beam and the thickness of the panel steel plate.

[0007] Therefore, it is necessary to invent a papermaking cantilever beam device that can automatically remove the support blocks without the need for tie rods to tighten them. Summary of the Invention

[0008] To address the above problems, this invention proposes a magnetic levitation device for a papermaking cantilever beam, and the technical solution adopted is as follows: A papermaking cantilever beam magnetic levitation device includes electromagnets installed on an upper cantilever beam and a lower cantilever beam, as well as a detachable support device and a detachable guide rail frame that cooperate with each other. The detachable support device includes a movable frame, a support plate slidably mounted on the movable frame and intermittently abutting against the upper cantilever beam, an upper clamping rod rotatably mounted on the support plate and intermittently clamping the upper cantilever beam, and a lower clamping rod rotatably mounted on the movable frame and intermittently clamping the lower cantilever beam; guide rollers are rotatably mounted on the movable frame. The detachable guide rail frame includes a mounting frame, a guide rail fixedly mounted on the mounting frame, a vacuum suction cup slidably mounted on the mounting frame and intermittently adsorbing the lower cantilever beam, and a guide drive rod mounted on the mounting frame and intermittently driving the guide roller to move; the guide roller intermittently enters the guide rail; Both the detachable support device and the detachable guide rail are made of non-magnetic materials.

[0009] Furthermore, the upper clamping rod is driven to rotate by a rotating motor fixedly mounted on the support plate; the lower clamping rod is driven to rotate by a rotating motor fixedly mounted on the movable frame.

[0010] Furthermore, a lead screw assembly is provided between the support plate and the movable frame. The lead screw assembly includes a threaded rod rotatably mounted on the movable frame and a threaded sleeve threaded onto the corresponding threaded rod and fixedly connected to the support plate. The threaded rod is driven to rotate by a support motor.

[0011] Furthermore, the guide drive rod is rotatably mounted on the mounting frame, and a limiting groove is provided on the guide drive rod corresponding to the guide roller; the guide roller intermittently enters the corresponding limiting groove; the guide drive rod is driven to rotate by a guide motor fixedly mounted on the mounting frame.

[0012] Furthermore, the vacuum suction cup is moved by a servo cylinder fixedly mounted on the mounting bracket.

[0013] Furthermore, the detachable guide rail bracket also includes a servo bidirectional lead screw; two mounting brackets are symmetrically slidably mounted on the servo bidirectional lead screw.

[0014] Furthermore, it also includes a maintenance support device, which includes a flip plate rotatably mounted on the lower cantilever beam, a sliding frame slidably mounted on the flip plate, a connecting frame slidably mounted on the flip plate, and a support roller rotatably mounted on the connecting frame and intermittently connected to the upper cantilever beam.

[0015] Furthermore, the flipping plate is driven to rotate by a flipping motor fixedly installed on the lower cantilever beam; the flipping plate is provided with a limiting pin, and the lower cantilever beam is provided with a limiting groove two corresponding to the limiting pin, and the limiting pin is slidably and rotatably installed in the limiting groove two.

[0016] Furthermore, the sliding frame is driven to slide by a servo screw mounted on the flip plate.

[0017] Furthermore, the connecting frame is moved by a hydraulic cylinder fixedly mounted on the sliding frame.

[0018] Because the present invention adopts the above-described technical solution, the present invention has the following advantages: 1. This invention, through the combined design of an electromagnet, a detachable support device, and a detachable guide rail frame, eliminates the need for manual removal of the support blocks before replacing the molding mesh or felt. The detachable support device automatically creates an opening between the upper and lower cantilever beams, utilizing the magnetic levitation effect of the electromagnet to support the upper and lower cantilever beams. The upper and lower cantilever beams do not require excessively large dimensions or panel steel plate thickness to maintain balance under the magnetic levitation effect and the action of the column on the other side, thus saving materials.

[0019] 2. The detachable support device and detachable guide rail frame of the present invention are very easy to install and remove, reducing maintenance time, effectively improving maintenance efficiency, and avoiding affecting normal production.

[0020] 3. The present invention also includes a maintenance support device. When maintaining the electromagnet, the detachable support device needs to leave an opening between the upper cantilever beam and the lower cantilever beam. The maintenance support device can provide temporary support between the upper cantilever beam and the lower cantilever beam, making it convenient for maintenance personnel to maintain the electromagnet. Attached Figure Description

[0021] Figures 1-3 This is a schematic diagram of the overall structure of the maintenance support device of the present invention after it is flipped downwards.

[0022] Figures 4-5 This is a schematic diagram of the overall structure of the maintenance support device of the present invention located on the lower cantilever beam.

[0023] Figures 6-10 This is a schematic diagram of the assembly structure of the detachable support device and the detachable guide rail frame of the present invention.

[0024] Figure 11 This is a schematic diagram of the detachable support device of the present invention.

[0025] Figure 12 This is a schematic diagram of the detachable guide rail frame of the present invention.

[0026] Figure 13 This is a schematic diagram of the maintenance support device of the present invention.

[0027] Figure 14 This is a schematic diagram of the assembly structure of the upper cantilever beam, lower cantilever beam, and column of the present invention.

[0028] Figures 15-16 This is a schematic diagram of the cantilever beam structure of the present invention.

[0029] Figure 17 This is a schematic diagram showing the connection between the control terminal and the electrical components of the present invention.

[0030] Icon labels: 1-Electromagnet; 2-Removable support device; 201-Moving frame (2011-Guide roller); 202-Rotation motor one; 203-Upper clamping rod; 204-Rotation motor two; 205-Lower clamping rod; 206-Screw assembly; 207-Support plate; 3-Detachable guide rail frame; 301-Servo bidirectional lead screw; 302-Mounting bracket (3021-Lifting plate); 303-Guide rail; 304-Vacuum suction cup; 305-Servo cylinder; 306-Guide motor; 307-Guide drive rod (3071-Limit slide groove one); 4-Maintenance support device; 401-Tilting plate (4011-Tilting shaft; 4012-Limit pin); 402-Servo screw; 403-Sliding frame; 404-Hydraulic cylinder; 405-Connecting frame; 406-Support roller; 407-Tilting motor; 5-Control terminal; 6-Upper cantilever beam; 601-Dating platform; 7-Lower cantilever beam; 701-Mounting platform; 702-Limiting slide groove II; 8-Column. Detailed Implementation

[0031] The technical solution of the present invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention; however, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0032] In the description of this invention, it should be noted that the terms "upper", "lower", "in", "out", "front", "rear", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of this invention is usually placed when in use. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention. Example:

[0033] like Figure 14 As shown, in the current large paper machine structure, one end of the upper cantilever beam 6 and the lower cantilever beam 7 are fixedly connected by the column 8. The forming net or felt usually passes through the space between the upper cantilever beam 6 and the lower cantilever beam 7. In this embodiment, it is used to support the other end of the upper cantilever beam 6 and the lower cantilever beam 7.

[0034] like Figures 1-5 and Figures 14-17As shown, a papermaking cantilever beam magnetic levitation device includes an electromagnet 1, a detachable support device 2, a detachable guide rail frame 3, a maintenance support device 4, and a control terminal 5. A mounting platform 701 is fixedly mounted on the end side of the lower cantilever beam 7, and a docking platform 601 is fixedly mounted on the end side of the upper cantilever beam 6. Four sets of electromagnets 1 are correspondingly mounted on the mounting platform 701 and the docking platform 601, with two electromagnets 1 in the same set respectively fixedly mounted on the mounting platform 701 and the docking platform 601. The detachable support device 2 and the detachable guide rail frame 3 cooperate with each other. The detachable support device 2 is detachably supported between the mounting platform 701 and the docking platform 601, and the detachable guide rail frame 3 is detachably mounted on the mounting platform 701. The maintenance support device 4 is located on the lower cantilever beam 7 and is used to temporarily support the upper cantilever beam 6 and the lower cantilever beam 7 when maintaining the electromagnet 1. The control terminal 5 is used to control the operation of the papermaking cantilever beam magnetic levitation device.

[0035] like Figures 6-11 As shown, the detachable support device 2 includes a movable frame 201, a first rotating motor 202, an upper clamping rod 203, a second rotating motor 204, a lower clamping rod 205, a lead screw assembly 206, and a support plate 207. The movable frame 201 is rectangular, with guide rollers 2011 rotatably mounted on each of its four corners. The lead screw assembly 206 consists of threaded rods and threaded sleeves, and there are four sets, respectively located at the four corners of the movable frame 201. The threaded rods are vertically arranged and rotatably mounted on the movable frame 201, and the threaded sleeves are threaded onto the corresponding threaded rods and fixedly connected to the support plate 207. The four threaded rods are driven to rotate by the same support motor, which is fixedly mounted on the movable frame 201. Its output end is synchronously connected to the four threaded rods through a transmission gear, a transmission wheel, and a transmission belt, so that the four threaded sleeves rise and fall synchronously, thereby driving the support plate 207 to rise and fall. A pressure sensor is provided on the upper surface of the support plate 207, which is electrically connected to the control terminal 5. A pair of upper clamping rods 203 are provided and symmetrically arranged at the left and right ends of the support plate 207; the bottom end of each upper clamping rod 203 is rotatably mounted on the support plate 207 via a rotating shaft, and the top end is provided with a short rod that intermittently hooks onto the docking platform 601. The upper clamping rod 203 is L-shaped in general; the rotating shafts of the two upper clamping rods 203 are synchronously connected through a transmission wheel, a transmission gear, and a transmission belt; a rotating motor 202 is fixedly mounted on the support plate 207, and its output end is coaxially fixedly connected to one of the rotating shafts; the rotating motor 202 can drive the two upper clamping rods 203 to rotate synchronously. A pair of lower clamping rods 205 are provided and symmetrically arranged at the front and rear ends of the movable frame 201. The top of each lower clamping rod 205 is rotatably mounted on the movable frame 201 via a rotating shaft 2, and the bottom end is provided with a clamping block of the intermittently pressing mounting table 701. The lower clamping rod 205 is generally L-shaped. The rotating shafts 2 of the two lower clamping rods 205 are synchronously connected through a transmission wheel, a transmission gear, and a transmission belt. The rotating motor 204 is fixedly mounted on the movable frame 201, and its output end is coaxially fixedly connected to one of the rotating shafts 2. The rotating motor 204 can drive the two lower clamping rods 205 to rotate synchronously. A pressure sensor 2 is provided on the inner side of the clamping block of the lower clamping rod 205 and is electrically connected to the control terminal 5.

[0036] like Figures 6-10 and Figure 12 As shown, the detachable guide rail frame 3 includes a servo bidirectional lead screw 301, a mounting frame 302, a guide rail 303, a vacuum suction cup 304, a servo cylinder 305, a guide motor 306, and a guide drive rod 307; two mounting frames 302 are symmetrically slidably mounted on the servo bidirectional lead screw 301; a lifting plate 3021 is vertically slidably mounted on each mounting frame 302, and three servo cylinders 305 are vertically fixedly mounted on the mounting frame 302, with the telescopic ends of the servo cylinders 305 fixedly connected to the lifting plate 3021; ​​three vertically upward vacuum suction cups 304 are fixedly mounted on each lifting plate 3021; ​​in this embodiment, the vacuum suction cups 304 are connected to an external pneumatic vacuum pump valve system through air pipes; Each mounting bracket 302 is fixedly mounted with a guide rail 303, which includes a horizontal section and an inclined section that are interconnected; the two guide rails 303 correspond to the guide rollers 2011 on the left and right sides of the movable frame 201 respectively, and the guide rollers 2011 can be inserted into the corresponding guide rails 303 from the side in an interlocking manner. Each mounting bracket 302 is equipped with a guide drive rod 307; the guide drive rod 307 is V-shaped in general, and its central turning point is rotatably mounted on the mounting bracket 302 via a rotating shaft. Each of the two branch rods is equipped with a limiting slide groove 3071. Two guide rollers 2011 on the same side as the guide drive rod 307 can be inserted into the two limiting slide grooves 3071 respectively from the side in an interlocking manner; the guide drive rod 307 is driven to rotate by a guide motor 306, which is fixedly mounted on the mounting bracket 302, and its output end is coaxially and fixedly connected to the rotating shaft of the corresponding guide drive rod 307.

[0037] like Figures 13-16As shown, the maintenance support device 4 includes a tilting plate 401, a servo screw 402, a sliding frame 403, a hydraulic cylinder 404, a connecting frame 405, a support roller 406, and a tilting motor 407. A tilting shaft 4011 is horizontally fixed on one end of the tilting plate 401, and the tilting shaft 4011 is rotatably mounted on the lower cantilever beam 7. Two tilting motors 407 are provided, both of which are fixedly mounted on the lower cantilever beam 7. The two tilting motors 407 are located at both ends of the tilting shaft 4011, and their output ends are coaxially fixedly connected to the end side of the tilting shaft 4011. A limit pin 4012 is fixedly installed on the tilting plate 401 at a position outside the tilting shaft 4011. An arc-shaped limit groove 702 is fixedly installed on the lower cantilever beam 7 corresponding to the limit pin 4012. The limit pin 4012 is slidably and rotatably installed in the corresponding limit groove 702. The servo screw 402 is horizontally mounted on the flip plate 401, and the sliding frame 403 is horizontally slidably mounted on the flip plate 401 and threadedly connected to the servo screw 402; two hydraulic cylinders 404 are fixedly mounted on the sliding frame 403, and the connecting frame 405 is fixedly mounted on the telescopic end of the hydraulic cylinders 404; two support rollers 406 are rotatably mounted on the connecting frame 405; in order to provide better support, limit blocks are fixedly provided at both ends of the connecting frame 405, so that the connecting frame 405 is U-shaped as a whole, and the two limit blocks can limit the left and right sides of the upper cantilever beam 6; When the forming mesh or felt is located in the space between the upper cantilever beam 6 and the lower cantilever beam 7, the flip plate 401 is located outside the lower cantilever beam 7.

[0038] In this embodiment, the support motor, rotating motor 202, rotating motor 204 and flipping motor 407 are all servo motors, and the detachable support device 2 and the detachable guide rail frame 3 are all made of non-magnetic materials, such as austenitic non-magnetic stainless steel or non-magnetic structural steel.

[0039] like Figure 17 As shown, control terminal 5 includes a main controller, an interactive switch, an information transmission module, a storage module, and a power supply module. The main controller is electrically connected to the interactive switch, the information transmission module, the storage module, the power supply module, as well as electromagnet 1, rotary motor 1 202, rotary motor 2 204, support motor, pressure sensor 1, pressure sensor 2, servo bidirectional lead screw 301, vacuum suction cup 304, servo cylinder 305, guide motor 306, servo lead screw 402, hydraulic cylinder 404, and tilting motor 407. The main controller is used to control the operation of the entire papermaking cantilever beam magnetic levitation device. The interactive switch is used to control the opening and closing of each electrical component. The information transmission module is used for information transmission between the main controller and each electrical component. The power supply module is used to provide a stable power supply to control terminal 5. The storage module is used to store the operation information data of the entire papermaking cantilever beam magnetic levitation device.

[0040] The working principle of this embodiment is as follows: I. Installation and removal of detachable support device 2 and detachable guide rail frame 3: First, place the movable frame 201 on the mounting platform 701; then start the rotating motor 204, the two lower clamping rods 205 rotate downwards, and the clamping blocks of the lower clamping rods 205 tightly press against the mounting platform 701. The pressure sensor 2 transmits the compression pressure signal between the clamping blocks of the lower clamping rods 205 and the mounting platform 701 to the control terminal 5. After the compression pressure reaches the set value, the output terminal of the rotating motor 204 stops rotating, and the two lower clamping rods 205 clamp the mounting platform 701, fixing the movable frame 201 on the mounting platform 701; then start the support motor, driving the threaded sleeves of the four sets of lead screw assemblies 206 to move upwards synchronously. The movement causes the support plate 207 to move upward and press against the docking platform 601. The pressure sensor transmits the compression pressure signal between the support plate 207 and the docking platform 601 to the control terminal 5. When the compression pressure reaches the set value, the output terminal of the support motor stops rotating, and the support plate 207 stops moving. Finally, the rotation motor 202 is started, and the two upper clamping rods 203 rotate upward. The short rod of the upper clamping rod 203 hooks onto the docking platform 601, and the two upper clamping rods 203 clamp the docking platform 601, thus fixing the support plate 207 onto the docking platform 601. In this way, the detachable support device 2 is installed and begins to play a supporting role.

[0041] After the detachable support device 2 is installed, the worker installs the detachable guide rail frame 3, so that the lower cantilever beam 7 passes between the two mounting frames 302, and the guide roller 2011 on the moving frame 201 is aligned with the horizontal part on the corresponding guide rail 303 and the limiting groove 3071 on the corresponding guide drive rod 307; then the servo bidirectional lead screw 301 is activated, the two mounting frames 302 move closer to each other, the vacuum suction cup 304 moves to below the lower cantilever beam 7, and the guide roller 2011 enters the horizontal part on the corresponding guide rail 303 and the limiting groove 3071 on the corresponding guide drive rod 307; finally, the servo cylinder 305 is activated, driving the lifting plate 3021 to move upward, the vacuum suction cup 304 contacts the lower end face of the lower cantilever beam 7, the vacuum suction cup 304 is activated and adsorbs onto the lower cantilever beam 7; thus, the detachable guide rail frame 3 is installed.

[0042] When disassembling the detachable support device 2 and the detachable guide rail frame 3, first turn off the vacuum suction cup 304, start the servo cylinder 305, and drive the lifting plate 3021 to move downward, so that the vacuum suction cup 304 disengages from the lower cantilever beam 7; then start the servo bidirectional lead screw 301, which drives the two mounting brackets 302 to move away from each other, and the guide roller 2011 disengages from the horizontal part on the corresponding guide rail 303 and the limit slide groove 3071 on the corresponding guide drive rod 307, and the operator removes the detachable guide rail frame 3; then start the first rotating motor 202 and the second rotating motor 204, the upper clamping rod 203 rotates downward and disengages from the docking table 601, and the lower clamping rod 205 rotates upward and disengages from the mounting table 701; finally, start the support motor, so that the support plate 207 descends and disengages from the upper cantilever beam 6, and the operator removes the detachable support device 2; in this way, the detachable support device 2 and the detachable guide rail frame 3 are disassembled, and maintenance and repair can be carried out after disassembly.

[0043] II. Temporary support when replacing molding mesh or felt: After the detachable support device 2 and the detachable guide rail frame 3 are installed, when changing the molding net or felt, first activate the electromagnet 1 on the docking platform 601 and the mounting platform 701 to generate a repulsive force between them. Set the current of the electromagnet 1 according to the required weight. Then activate the rotating motor 1 202 and the rotating motor 204. The upper clamping rod 203 rotates downward and disengages from the docking platform 601, and the lower clamping rod 205 rotates upward and disengages from the mounting platform 701. Activate the support motor to lower the support plate 207 and disengage from the upper cantilever beam 6. Finally, activate the guide motor 306. The guide drive rod 307 rotates, moving the guide roller 2011 from the horizontal part of the guide rail 303 to the inclined part. The movable frame 201 moves downward along the guide rail 303, creating an opening between the docking platform 601 and the mounting platform 701. After the opening is created, the docking platform 601 and the mounting platform 701 are temporarily supported by the magnetic levitation effect generated by the electromagnet 1. The worker takes out the molding net or felt to be replaced through the opening and moves the new molding net or felt through the opening to the space between the upper cantilever beam 6 and the lower cantilever beam 7 to complete the replacement of the molding net or felt. After the replacement is completed, the guide motor 306 is started again, and the guide drive rod 307 rotates in the opposite direction, so that the movable frame 201 returns to the mounting platform 701. The lower clamping rod 205 clamps the mounting platform, the support plate 207 abuts against the docking platform 601, and the upper clamping rod 203 clamps the docking platform 601. The detachable support device 2 continues to provide support.

[0044] III. Temporary support during the maintenance of electromagnet 1: When repairing electromagnet 1, first start the servo screw 402, the sliding frame 403 moves, and adjust the position of the support roller 406 so that the support roller 406 can avoid the forming net or felt; then start the flip motor 407, and the flip plate 401 rotates onto the lower cantilever beam 7; finally start the hydraulic cylinder 404, the connecting frame 405 moves upward, the support roller 406 abuts against the bottom surface of the upper cantilever beam 6, and the two limit blocks can limit the left and right sides of the upper cantilever beam 6 to provide temporary support between the upper cantilever beam 6 and the lower cantilever beam 7; After the temporary support is started, start the first rotating motor 202 and the second rotating motor 204. The upper clamping rod 203 rotates downward and disengages from the docking platform 601, and the lower clamping rod 205 rotates upward and disengages from the mounting platform 701. Start the support motor to lower the support plate 207 and disengage from the upper cantilever beam 6. Finally, start the guide motor 306, and the guide drive rod 307 rotates, which moves the guide roller 2011. The guide roller 2011 moves from the horizontal part of the guide rail 303 to the inclined part. The moving frame 201 moves downward along the guide rail 303 to make room for the opening between the docking platform 601 and the mounting platform 701. Remove the molding net or felt, and maintenance personnel can then perform maintenance on the electromagnets 1 on the upper cantilever beam 6 and the lower cantilever beam 7. After maintenance is completed, the shaped net or felt is returned to its original position, the movable frame 201 returns to the mounting platform 701, the detachable support device 2 begins to provide support, the hydraulic cylinder 404 drives the connecting frame 405 to move downward, the support roller 406 disengages from the upper cantilever beam 6, the flipping motor 407 drives the flipping plate 401 to flip downward to the side of the lower cantilever beam 7, and the maintenance support device 4 returns to its original position.

Claims

1. A magnetic levitation device for a papermaking cantilever beam, characterized in that, It includes electromagnets installed on the upper and lower cantilever beams, as well as detachable support devices and detachable guide rails that cooperate with each other. The detachable support device includes a movable frame, a support plate slidably mounted on the movable frame and intermittently abutting against the upper cantilever beam, an upper clamping rod rotatably mounted on the support plate and intermittently clamping the upper cantilever beam, and a lower clamping rod rotatably mounted on the movable frame and intermittently clamping the lower cantilever beam; guide rollers are rotatably mounted on the movable frame. The detachable guide rail frame includes a mounting frame, a guide rail fixedly mounted on the mounting frame, a vacuum suction cup slidably mounted on the mounting frame and intermittently adsorbing the lower cantilever beam, and a guide drive rod mounted on the mounting frame and intermittently driving the guide roller to move; the guide roller intermittently enters the guide rail; Both the detachable support device and the detachable guide rail are made of non-magnetic materials; It also includes a maintenance support device, which includes a flip plate rotatably mounted on the lower cantilever beam, a sliding frame slidably mounted on the flip plate, a connecting frame slidably mounted on the flip plate, and a support roller rotatably mounted on the connecting frame and intermittently abutting against the upper cantilever beam. The flipping plate is driven to rotate by a flipping motor fixedly installed on the lower cantilever beam; the flipping plate is provided with a limiting pin, and the lower cantilever beam is provided with a limiting groove two corresponding to the limiting pin, and the limiting pin is slidably and rotatably installed in the limiting groove two.

2. The papermaking cantilever beam magnetic levitation device according to claim 1, characterized in that, The upper clamping rod is driven to rotate by a rotating motor fixedly mounted on the support plate; the lower clamping rod is driven to rotate by a rotating motor fixedly mounted on the movable frame.

3. The papermaking cantilever beam magnetic levitation device according to claim 1, characterized in that, A lead screw assembly is provided between the support plate and the movable frame; the lead screw assembly includes a threaded rod rotatably mounted on the movable frame, and a threaded sleeve threaded onto the corresponding threaded rod and fixedly connected to the support plate; the threaded rod is driven to rotate by a support motor.

4. The papermaking cantilever beam magnetic levitation device according to claim 1, characterized in that, The guide drive rod is rotatably mounted on the mounting frame, and a limiting groove is provided on the guide drive rod corresponding to the guide roller; the guide roller intermittently enters the corresponding limiting groove; the guide drive rod is driven to rotate by a guide motor fixedly mounted on the mounting frame.

5. The papermaking cantilever beam magnetic levitation device according to claim 1, characterized in that, The vacuum suction cup is moved by a servo cylinder that is fixedly mounted on the mounting bracket.

6. The papermaking cantilever beam magnetic levitation device according to claim 1, characterized in that, The detachable guide rail frame also includes a servo bidirectional lead screw; two mounting brackets are symmetrically slidably mounted on the servo bidirectional lead screw.

7. The papermaking cantilever beam magnetic levitation device according to claim 1, characterized in that, The sliding frame is driven to slide by a servo screw mounted on the flip plate.

8. The papermaking cantilever beam magnetic levitation device according to claim 1, characterized in that, The connecting frame is moved by a hydraulic cylinder that is fixedly mounted on the sliding frame.

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