Rack for pickled steel sheets

Abstract

The present invention relates to the technical field of steel plate pickling processing, in particular to a material rack for pickling steel plates, which includes a support table, a mounting frame and a controller. Two groups of mounting frames are arranged at the top of the support table, and a controller is installed on one group of mounting frames. It also includes a moving component, a lifting component, a hoisting component and a limiting component. The moving component is arranged on the mounting frame, the lifting component is arranged on the moving component, multiple groups of hoisting components are arranged on the lifting component, and the limiting components are respectively arranged between adjacent two groups of hoisting components. When in use, operate the moving component to move leftward on the two groups of mounting frames, then operate the lifting component to drive multiple groups of hoisting components to descend, then operate the second group of hoisting components on the right to hoist the steel plate. At the same time, the second group of hoisting components on the right is released from the restriction of the limiting component by the third group of hoisting components on the right, and at the same time, the second group of hoisting components on the left limits the first group of hoisting components on the left through the limiting component, so as to improve the pickling efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of steel plate pickling processing, and particularly to a material rack for pickling steel plates. Background Art

[0002] Steel plates are widely used in various fields. In order to further improve their corrosion resistance and rust resistance, stainless steel often needs to be further pickled and passivated during production to improve the corrosion resistance of steel.

[0003] In the prior art, a patent document with the publication number of CN209113995U discloses a pickling tank for facilitating feeding in rust removal of color steel plates, including a base and a tank body. On both sides at one end of the outer wall of the top of the base, first brackets are fixed by screws, and support plates are fixed by screws on the outer wall of one side of each first bracket. Driving motors are fixed by screws on the outer walls of the tops of the two support plates. On both sides at the other end of the outer wall of the top of the base, second brackets are fixed by screws, and first grooves are formed on the outer walls of the two second brackets close to the first brackets. The inner walls of the two first grooves are rotatably connected with screws through bearings, and the other sides of the two screws are connected to the output shafts of the driving motors through couplings. The outer walls of one side of the two screws are threadedly connected to the same mounting plate.

[0004] During the use process, it is found that when the above device pickles steel plates, the feeding order of the steel plates is relatively random, and interference occurs during the feeding between two groups of steel plates, resulting in low pickling efficiency. Summary of the Invention

[0005] In order to solve the above technical problems, the present invention provides a material rack for pickling steel plates that improves pickling efficiency.

[0006] The material rack for pickling steel plates of the present invention includes a support table, a mounting frame, and a controller. Two sets of mounting frames are provided at the top of the support table, and a controller is mounted on one set of mounting frames. It also includes a moving component, a lifting component, a hoisting component, and a limiting component. The moving component is arranged on the mounting frame 102, the lifting component is arranged on the moving component, multiple sets of hoisting components are arranged on the lifting component, and the limiting components are respectively arranged between adjacent two sets of hoisting components; during use, operate the moving component to move leftward on the two sets of mounting frames, then operate the lifting component to drive multiple sets of hoisting components to descend, then operate the first set of hoisting components on the right side to hoist the steel plate. At the same time, the first set of hoisting components on the right side releases the restriction of the limiting component with the second set of hoisting components on the right side, then operate the second set of hoisting components on the right side to hoist the steel plate. At the same time, the second set of hoisting components on the right side releases the restriction of the limiting component with the third set of hoisting components on the right side, and so on. Thus, while realizing the feeding of the steel plates from right to left in sequence, it avoids the mutual interference between multiple sets of hoisting components during the hoisting and feeding of the steel. At the same time, multiple sets of hoisting components hoist the steel plates separately, operate the lifting component to rise, so that the steel plate rises. Then, when the lifting component moves above the pickling tank in cooperation with the moving component, operate the lifting component to descend, so that multiple sets of steel plates enter the pickling tank for pickling, realizing the sufficiency of steel plate pickling. When unloading the steel plates, first hoist the steel plate on the first set of hoisting components on the left side, then unload the steel plate on the second set of hoisting components on the left side. At the same time, the second set of hoisting components on the left side limits the first set of hoisting components on the left side through the limiting component, improving the convenience.

[0007] Preferably, the moving component includes vertical plates, a first lead screw, a motor base, sprockets, a chain, a moving seat, a moving plate, a first motor, and rollers. Two sets of vertical plates are respectively provided at the top of each set of mounting frames. A first lead screw is rotatably arranged between the two sets of vertical plates. The first motor is installed on the top of one set of mounting frames through the motor base. The output end of the first motor is connected to one end of the first lead screw. A set of sprockets is respectively arranged on each first lead screw. The two sprockets are driven by a chain. A set of moving seats is respectively screwed on each first lead screw. A moving plate is arranged between the two moving seats. Multiple sets of rollers are respectively arranged at the bottom of each moving seat. The multiple sets of rollers are in rolling contact with the top of the mounting frame. The lifting component is arranged on the moving plate; when it is necessary to move the lifting component left and right, the staff starts the first motor, so that the two sprockets are driven by the chain, thus realizing the synchronous and same-direction rotation of the two first lead screws. Since the two moving seats are respectively threadedly connected to the two first lead screws, the two moving seats drive the moving plate to move left and right in cooperation with the rollers, further enabling the moving plate to drive the lifting component to move left and right, and further enabling the lifting component to drive multiple sets of hoisting components to move left and right, improving the flexibility.

[0008] Preferably, the lifting assembly includes an electric hydraulic cylinder, a bracket, and a rack frame. An electric hydraulic cylinder is provided at the top end of the moving plate. The bottom moving end of the electric hydraulic cylinder extends below the moving plate and is respectively connected to the top ends of a group of brackets. The bottom ends of the two groups of brackets are both connected to the top end of the rack frame. A plurality of lifting assemblies are provided inside the sprocket, and a group of limiting assemblies are provided between two adjacent groups of lifting assemblies. During use, operate the electric hydraulic cylinder to extend, so that the two groups of brackets cooperate with each other to drive the rack frame to descend. Then, operate the plurality of lifting assemblies to respectively lift the steel plates from right to left in sequence, improving convenience.

[0009] Preferably, the lifting assembly includes a second motor, a hook suspension rod, a winding drum, a rope, a hook, and a mounting plate. The second motor is installed on the rack frame. The hook suspension rod is rotatably installed inside the rack frame. A plurality of winding drums are provided on the hook suspension rod. A group of ropes are respectively wound on each group of winding drums. The starting ends of the plurality of ropes are all connected to the top end of the mounting plate. A plurality of hooks are provided at the bottom end of the mounting plate. During use, start the second motor, so that the hook suspension rod drives the plurality of winding drums to rotate synchronously in the same direction, so that the winding drums synchronously unwind the ropes, further causing the mounting plate to drive the plurality of hooks to descend. Then, place a group of steel plates on the plurality of hooks in the first row on the right. The limiting assembly between the hook suspension rod of the first group on the right and the hook suspension rod of the second group on the right contacts and limits. The staff starts the second motor of the second group on the right, so that the plurality of hooks in the second row on the right lift the steel plate.

[0010] Preferably, the limiting component includes a fixed block, a clamping groove, a fixed seat, a first gear, a second lead screw, a second gear, a fixed rod, a moving block and a clamping block. A set of first gears is arranged on the hook suspension rod. A set of fixed seats is arranged on the inner side wall of the rack frame body. The fixed seats are between two adjacent hook suspension rods. A set of fixed blocks is fixedly arranged on each group of hook suspension rods. A set of clamping grooves is respectively arranged on each group of fixed blocks. A set of second lead screws is rotatably arranged on the fixed seats. A set of second gears is respectively arranged on each group of second lead screws. A set of fixed rods is fixedly installed on the fixed seats. The moving block is threadedly connected with the second lead screw and slidably connected with the fixed rod. The clamping block is installed on the moving block. The clamping block is adapted to the clamping groove. The first gear is meshed with the second gear. In the normal state, the clamping block is inside the clamping groove. When it is necessary to hoist the steel plates in sequence by the hook, operate the first group of second motors on the right side, so that the first group of hook suspension rods on the right side pay out a plurality of ropes, so as to realize the height reduction of a plurality of hooks. Then place the steel plate on the hooks in the first row on the right side. When the first group of hook suspension rods on the right side rotate, they drive the first gear to rotate. The first gear drives the second gear to rotate. Further, the second gear drives the second lead screw to rotate. The second lead screw drives the moving block to move with the cooperation of the fixed rod, so that the first group of clamping blocks on the right side is separated from the clamping groove on the second group of fixed blocks on the right side, so as to release the restriction on the second group of hook suspension rods on the right side. Then start the second group of second motors on the right side, so that the second group of clamping blocks on the right side is separated from the clamping groove on the third group of fixed blocks on the right side, so as to release the restriction on the third group of hook suspension rods on the right side. And so on, realizing the orderly feeding of the steel plates from right to left.

[0011] Preferably, it further includes a guiding component. A plurality of guiding components are arranged at the bottom end of the rack frame body. The guiding components are used for guiding the ropes.

[0012] The guiding component includes a U-shaped frame, a strip-shaped opening, a rotating shaft, a guiding roller, a concave groove, a spring, a telescopic rod, a buffer plate and a buffer pad. The U-shaped frame is installed at the bottom end of the rack frame body. A strip-shaped opening is arranged on the U-shaped frame. Two rotating shafts are rotatably arranged in the strip-shaped opening. A guiding roller is respectively installed on each rotating shaft. Two concave grooves are respectively arranged at the bottom end of each U-shaped frame. A telescopic rod is respectively arranged inside each concave groove. A buffer plate is respectively arranged at the bottom end of each telescopic rod. A buffer pad is respectively arranged at the bottom end of each buffer plate. A spring is respectively sleeved outside each telescopic rod. The ropes pass between the two guiding rollers. When paying out a plurality of ropes, the two guiding rollers rotate adaptively, so as to guide the plurality of ropes. When winding the ropes, the top end of the mounting plate contacts the bottom ends of the two buffer pads, so that the two springs and the two telescopic rods are shortened, realizing the slow contact between the top end of the mounting plate and the bottom end of the U-shaped frame, reducing the hard collision and improving the service life.

[0013] Preferably, the hook is made of a solid steel bar, and a tetrafluoro rubber sleeve is sleeved outside the hook.

[0014] Preferably, it further includes a reinforcing plate, and a reinforcing plate is arranged between the support platform and the mounting frame; the connection between the support platform and the mounting frame is strengthened by the reinforcing plate to improve the connection firmness.

[0015] Preferably, it further includes a polished rod. A polished rod is arranged at the top end of the rack frame body, and the polished rod is slidably connected with the moving plate; the electric hydraulic cylinder drives the rack frame body to lift stably under the guiding cooperation of the polished rod, improving the lifting stability.

[0016] Preferably, it further includes a limiting block, and a set of limiting blocks are respectively arranged at the top end of each group of polished rods; the limiting blocks limit the descending height of the polished rods to improve safety.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: When in use, operate the moving assembly to move leftward on the two mounting frames, then operate the lifting assembly to drive multiple groups of hoisting assemblies to descend, then operate the first group of hoisting assemblies on the right side to hoist the steel plate. At the same time, the first group of hoisting assemblies on the right side releases the restriction of the limiting assembly on the second group of hoisting assemblies on the right side, and then operate the second group of hoisting assemblies on the right side to hoist the steel plate. At the same time, the second group of hoisting assemblies on the right side releases the restriction of the limiting assembly on the third group of hoisting assemblies on the right side, and so on. Thus, while realizing the sequential feeding of the steel plates from right to left, the mutual interference during the hoisting and feeding of the steel by multiple groups of hoisting assemblies is avoided. At the same time, multiple groups of hoisting assemblies hoist the steel plates separately, operate the lifting assembly to rise, so that the steel plates rise. Then, when the lifting assembly moves in cooperation with the moving assembly above the pickling tank, operate the lifting assembly to descend, so that multiple groups of steel plates enter the pickling tank for pickling, realizing the sufficiency of the pickling of the steel plates. When unloading the steel plates, first hoist the steel plate on the first group of hoisting assemblies on the left side, and then unload the steel plate from the second group of hoisting assemblies on the left side. At the same time, the second group of hoisting assemblies on the left side limits the first group of hoisting assemblies on the left side through the limiting assembly, improving the convenience. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is the axonometric structure schematic diagram of the present invention;

[0019] Figure 2 is the exploded structure schematic diagram of the present invention;

[0020] Figure 3 is the enlarged structure schematic diagram of the vertical plate and the support platform and other structures;

[0021] Figure 4 is Figure 3 the partial enlarged structure schematic diagram of part A in

[0022] Figure 5 is the enlarged structure schematic diagram of the moving plate and the rollers and other structures;

[0023] Figure 6 It is the first enlarged structural schematic diagram of the rack frame and the second motor, etc.;

[0024] Figure 7 It is the second enlarged structural schematic diagram of the rack frame and the second motor, etc.;

[0025] Figure 8 It is the top view structural schematic diagram of the rack frame and the second motor, etc.;

[0026] Figure 9 It is the enlarged structural schematic diagram of the winding drum and the hook, etc.;

[0027] Figure 10 It is Figure 9 The partial enlarged structural schematic diagram of part B in;

[0028] Figure 11 It is the enlarged structural schematic diagram of the U-shaped frame and the guide roller, etc.;

[0029] Figure 12 It is Figure 11 The partial enlarged structural schematic diagram of part C in;

[0030] Figure 13 It is the enlarged structural schematic diagram of the hook suspension rod and the mounting plate, etc.;

[0031] Figure 14 It is Figure 13 The partial enlarged structural schematic diagram of part D in.

[0032] Markings in the attached drawings: 101, support platform; 102, mounting frame; 103, controller; 201, vertical plate; 202, first lead screw; 203, motor base; 204, sprocket; 205, chain; 206, moving seat; 207, moving plate; 208, first motor; 209, roller; 301, electric hydraulic cylinder; 303, bracket; 304, rack frame; 305, smooth rod; 306, limit block; 401, second motor; 404, hook suspension rod; 405, winding drum; 406, rope; 407, hook; 408, mounting plate; 501, fixed block; 502, card slot; 503, fixed seat; 504, first gear; 505, second lead screw; 506, second gear; 507, fixed rod; 508, moving block; 509, clamping block; 601, U-shaped frame; 602, strip-shaped opening; 603, rotating shaft; 604, guide roller; 605, concave groove; 606, spring; 607, telescopic rod; 608, buffer plate; 609, buffer pad. Specific implementation mode

[0033] To facilitate the understanding of the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings. The present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided to make the disclosure of the present invention more thorough and comprehensive. Embodiment 1

[0034] As Figures 1 to 14 shown, the pickling steel plate rack of the present invention includes a support table 101, a mounting frame 102, and a controller 103. Two groups of mounting frames 102 are provided at the top of the support table 101, and a controller 103 is mounted on one group of mounting frames 102. It further includes a moving component, a lifting component, a hoisting component, and a limiting component. The moving component is arranged on the mounting frame 102, the lifting component is arranged on the moving component, multiple groups of hoisting components are arranged on the lifting component, and the limiting components are respectively arranged between adjacent two groups of hoisting components;

[0035] The moving component includes vertical plates 201, a first lead screw 202, a motor base 203, sprockets 204, a chain 205, a moving seat 206, a moving plate 207, a first motor 208, and rollers 209. Two groups of vertical plates 201 are respectively provided at the top of each group of mounting frames 102. A first lead screw 202 is rotatably arranged between the two groups of vertical plates 201. The first motor 208 is mounted on the top of one group of mounting frames 102 through the motor base 203. The output end of the first motor 208 is connected to one end of a first lead screw 202. A sprocket 204 is respectively arranged on each first lead screw 202. The two sprockets 204 are driven by the chain 205. A moving seat 206 is respectively screwed on each first lead screw 202. A moving plate 207 is arranged between the two moving seats 206. Multiple groups of rollers 209 are respectively provided at the bottom of each moving seat 206. The multiple groups of rollers 209 are in rolling contact with the top of the mounting frame 102. The lifting component is arranged on the moving plate 207;

[0036] The lifting component includes an electric hydraulic cylinder 301, a bracket 303, and a rack frame 304. The electric hydraulic cylinder 301 is arranged at the top of the moving plate 207. The bottom moving end of the electric hydraulic cylinder 301 extends below the moving plate 207 and is respectively connected to the top of a group of brackets 303. The bottom ends of the two groups of brackets 303 are both connected to the top of the rack frame 304. Multiple groups of hoisting components are arranged inside the sprocket 204. A group of limiting components are arranged between the adjacent two groups of hoisting components;

[0037] The hoisting assembly includes a second motor 401, a hook suspension rod 404, a winding drum 405, a rope 406, a hook 407 and a mounting plate 408. The second motor 401 is installed on the rack frame 304. The hook suspension rod 404 is rotatably installed inside the rack frame 304. A plurality of groups of winding drums 405 are arranged on the hook suspension rod 404. A group of ropes 406 are respectively wound on each group of winding drums 405. The starting ends of the plurality of groups of ropes 406 are all connected to the top end of the mounting plate 408. A plurality of groups of hooks 407 are arranged at the bottom end of the mounting plate 408;

[0038] The limiting assembly includes a fixed block 501, a clamping groove 502, a fixed seat 503, a first gear 504, a second lead screw 505, a second gear 506, a fixed rod 507, a moving block 508 and a clamping block 509. A group of first gears 504 are arranged on the hook suspension rod 404. A group of fixed seats 503 are arranged on the inner side wall of the rack frame 304. The fixed seats 503 are between two adjacent hook suspension rods 404. A group of fixed blocks 501 are fixedly arranged on each group of hook suspension rods 404. A group of clamping grooves 502 are respectively arranged on each group of fixed blocks 501. A group of second lead screws 505 are rotatably arranged on the fixed seats 503. A group of second gears 506 are respectively arranged on each group of second lead screws 505. A group of fixed rods 507 are fixedly installed on the fixed seats 503. The moving block 508 is threadedly connected to the second lead screw 505 and slidably connected to the fixed rod 507. The clamping block 509 is installed on the moving block 508. The clamping block 509 is adapted to the clamping groove 502. The first gear 504 is meshed with the second gear 506.

[0039] In this embodiment, when it is necessary to move the lifting component left and right, the staff starts the first motor 208, so that the two groups of sprockets 204 are driven by the chain 205, so as to realize the synchronous and co-directional rotation of the two groups of first lead screws 202. Since the two groups of moving seats 206 are respectively threadedly connected to the two groups of first lead screws 202, the two groups of moving seats 206 drive the moving plate 207 to move left and right in cooperation with the rollers 209, further enabling the moving plate 207 to drive the lifting component to move left and right, and further enabling the lifting component to drive multiple groups of hoisting components to move left and right. Operate the electric hydraulic cylinder 301 to extend, so that the two groups of brackets 303 cooperate with each other to drive the rack frame 304 to descend. Start the second motor 401, so that the hook suspension rod 404 drives multiple groups of winding drums 405 to rotate synchronously and in the same direction, so that the winding drums 405 unwind the ropes 406 synchronously, and further enable the mounting plate 408 to drive multiple groups of hooks 407 to descend. Then place a steel plate on multiple groups of hooks 407 in the first row on the right. When the first hook suspension rod 404 on the right rotates, it drives the first gear 504 to rotate. The first gear 504 drives the second gear 506 to rotate, and further enables the second gear 506 to drive the second lead screw 505 to rotate. The second lead screw 505 drives the moving block 508 to move in cooperation with the fixed rod 507, so that the first clamping block 509 on the right is separated from the clamping groove 502 on the second fixed block 501 on the right, so as to release the restriction on the second hook suspension rod 404 on the right. Then start the second second motor 401 on the right, so that the second clamping block 509 on the right is separated from the clamping groove 502 on the third fixed block 501 on the right, so as to release the restriction on the third hook suspension rod 404 on the right, and so on, to realize the orderly feeding of steel plates from right to left. Embodiment 2

[0040] As Figures 1 to 14 shown, on the basis of Embodiment 1, the guiding component includes a U-shaped frame 601, a strip-shaped opening 602, a rotating shaft 603, a guiding roller 604, a concave groove 605, a spring 606, a telescopic rod 607, a buffer plate 608 and a buffer pad 609. The U-shaped frame 601 is installed at the bottom end of the rack frame 304. A strip-shaped opening 602 is provided on the U-shaped frame 601. Two groups of rotating shafts 603 are rotatably arranged in the strip-shaped opening 602. A guiding roller 604 is installed on each group of rotating shafts 603. Two groups of concave grooves 605 are respectively provided at the bottom end of each group of U-shaped frames 601. A telescopic rod 607 is respectively arranged inside each group of concave grooves 605. A buffer plate 608 is respectively provided at the bottom end of each group of telescopic rods 607. A buffer pad 609 is respectively provided at the bottom end of each group of buffer plates 608. A spring 606 is respectively sleeved outside each group of telescopic rods 607. The rope 406 passes between the two groups of guiding rollers 604;

[0041] It further includes a polished rod 305. The polished rod 305 is arranged at the top end of the rack frame 304, and the polished rod 305 is slidably connected to the moving plate 207;

[0042] It further includes a limit block 306. A set of limit blocks 306 are respectively arranged at the top ends of each group of polished rods 305.

[0043] In this embodiment, during use, the second motor 401 is started, so that the hook suspension rod 404 drives a plurality of winding drums 405 to rotate synchronously in the same direction, so that the winding drums 405 unwind the ropes 406 synchronously, and further the mounting plate 408 drives a plurality of hooks 407 to descend. Then a steel plate is placed on a plurality of hooks 407 in the first row on the right side. The limit component between the hook suspension rod 404 of the first group on the right side and the hook suspension rod 404 of the second group on the right side is in contact for limiting. The staff starts the second motor 401 of the second group on the right side, so that a plurality of hooks 407 in the second row on the right side hoist the steel plate. When the ropes 406 are unwound, the two guide rollers 604 rotate adaptively, so that when the ropes 406 are guided and wound, the bottom ends of the two buffer pads 609 are in contact with the top end of the mounting plate 408, so that the two springs 606 and the two telescopic rods 607 are shortened, realizing the slow contact between the top end of the mounting plate 408 and the bottom end of the U-shaped frame 601, reducing hard collision and improving the service life.

[0044] The controller 103, the second motor 401 and the electric hydraulic cylinder 301 of the pickling steel plate rack of the present invention are purchased on the market. Those skilled in the art only need to install and operate according to the attached operation manual, without the need for those skilled in the art to make creative efforts.

[0045] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and modifications can be made, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A material rack for pickling steel plates, comprising a support platform (101), a mounting frame (102) and a controller (103), wherein two groups of mounting frames (102) are arranged on the top of the support platform (101), and a controller (103) is installed on one group of mounting frames (102), characterized in that: It also includes a moving component, a lifting component, a hoisting component and a limiting component, wherein the moving component is arranged on a mounting frame (102), the lifting component is arranged on the moving component, a plurality of groups of hoisting components are arranged on the lifting component, and the limiting components are respectively arranged between two adjacent groups of hoisting components; The moving assembly comprises a vertical plate (201), a first lead screw (202), a motor seat (203), a sprocket (204), a chain (205), a moving seat (206), a moving plate (207), a first motor (208) and a roller (209), two groups of vertical plates (201) are respectively arranged at the top of each group of mounting frames (102), a group of first lead screws (202) is rotatably arranged between the two groups of vertical plates (201), the first motor (208) is installed at the top of a group of mounting frames (102) through the motor seat (203), and the output end of the first motor (208) is connected to the roller (209). One end of a group of No. 1 lead screws (202) is connected, each group of No. 1 lead screws (202) is respectively provided with a group of sprocket wheels (204), the two groups of sprocket wheels (204) are driven by a chain (205), each group of No. 1 lead screws (202) is respectively provided with a group of moving seats (206) screwed thereon, a moving plate (207) is provided between the two groups of moving seats (206), a plurality of groups of rollers (209) are respectively provided at the bottom end of each group of moving seats (206), the plurality of groups of rollers (209) are in rolling contact with the top end of the mounting frame (102), and a lifting assembly is provided on the moving plate (207); The lifting assembly comprises an electric hydraulic cylinder (301), a bracket (303) and a rack frame (304); the electric hydraulic cylinder (301) is arranged at the top of the movable plate (207); the bottom movable end of the electric hydraulic cylinder (301) extends below the movable plate (207) and is respectively connected to the top of a group of brackets (303); the bottom ends of the two groups of brackets (303) are connected to the top of the rack frame (304); a plurality of lifting assemblies are arranged inside the sprocket (204); and a limit assembly is arranged between two adjacent groups of lifting assemblies; The hoisting assembly comprises a No. 2 motor (401), a hook suspension rod (404), a winding drum (405), a rope (406), a hook (407) and a mounting plate (408), wherein the No. 2 motor (401) is mounted on a material rack frame (304), the hook suspension rod (404) is rotatably mounted on the inner side of the material rack frame (304), a plurality of groups of winding drums (405) are arranged on the hook suspension rod (404), a group of ropes (406) are respectively wound around each group of winding drums (405), the starting ends of the plurality of groups of ropes (406) are connected to the top end of the mounting plate (408), and a plurality of groups of hooks (407) are arranged at the bottom end of the mounting plate (408); The limiting assembly comprises a fixed block (501), a slot (502), a fixed seat (503), a first gear (504), a second lead screw (505), a second gear (506), a fixed rod (507), a moving block (508) and a clamping block (509); a group of first gears (504) are arranged on the hook suspension rod (404); a group of fixed seats (503) are arranged on the inner side wall of the material rack frame (304); the fixed seats (503) are between two adjacent groups of hook suspension rods (404); a group of fixed blocks (501) are fixedly arranged on each group of hook suspension rods (404); and each group of fixed blocks (501) has a plurality of fixed blocks (501) on each group of hook suspension rods (404). A group of card slots (502) are respectively provided, a group of No. 2 lead screws (505) are rotatably provided on the fixed seat (503), and a group of No. 2 gears (506) are respectively provided on each group of No. 2 lead screws (505), a group of fixed rods (507) are fixedly installed on the fixed seat (503), a moving block (508) is threadedly connected to the No. 2 lead screws (505) and is slidably connected to the fixed rods (507), a card block (509) is installed on the moving block (508), the card block (509) is adapted to the card slot (502), and the No. 1 gear (504) is meshed with the No. 2 gear (506).

2. The pickling steel plate rack according to claim 1, characterized in that: It also includes a guide assembly, wherein a plurality of guide assemblies are arranged at the bottom end of the rack frame (304), and the guide assemblies are used to guide the rope (406); The guide assembly comprises a U-shaped frame (601), a strip-shaped opening (602), a rotating shaft (603), a guide roller (604), a concave groove (605), a spring (606), a telescopic rod (607), a buffer plate (608) and a buffer pad (609). The U-shaped frame (601) is installed at the bottom end of the rack frame (304). The U-shaped frame (601) is provided with a strip-shaped opening (602). Two groups of rotating shafts (603) are rotatably provided in the strip-shaped opening (602). Each group of rotating shafts (603) has a plurality of rotating shafts (603). A group of guide rollers (604) are installed separately, two groups of concave grooves (605) are respectively arranged at the bottom of each group of U-shaped frames (601), a group of telescopic rods (607) are respectively arranged inside each group of concave grooves (605), a group of buffer plates (608) are respectively arranged at the bottom of each group of telescopic rods (607), a group of buffer pads (609) are respectively arranged at the bottom of each group of buffer plates (608), a group of springs (606) are respectively sleeved on the outside of each group of telescopic rods (607), and the rope (406) passes between the two groups of guide rollers (604).

3. The pickling steel plate rack according to claim 1, characterized in that: The hook (407) is made of a solid steel bar, and a polytetrafluoroethylene rubber sleeve is sleeved on the outside of the hook (407).

4. The pickling steel plate rack according to claim 1, characterized in that: It also comprises a reinforcing plate, and the reinforcing plate is arranged between the supporting platform (101) and the mounting frame (102).

5. The pickling steel plate rack according to claim 1, characterized in that: It also comprises a polished rod (305), the top of the rack frame (304) being provided with the polished rod (305), the polished rod (305) being slidably connected to the movable plate (207).

6. The pickling steel plate rack according to claim 5, characterized in that: It also includes a limit block (306), and each group of light rods (305) is respectively provided with a group of limit blocks (306) at the top end.

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