A sieve plate hoisting device

Abstract

The utility model belongs to the technical field of screen board hoisting, and disclose a screen board hoisting device, including the horizontal setting crossbeam, the left and right ends of crossbeam are welded with A type frame, the bottom of A type frame is welded with the bearing base, the bottom of bearing base is installed with the symmetrical setting universal wheel, install electric hoist on the crossbeam, install the vertical stable rope subassembly that corresponds to the arrangement of the steel wire rope of electric hoist on A type frame, the front and back sides of A type frame all are provided with detachable guardrail, and electric hoist drive replaces artificial relay, and the time consumption of single piece screen board handling is greatly reduced, and the rigid support of bearing base and brake universal wheel, eliminate the equipment slip during hoisting, realize " one -key hoisting, accurate alignment", eliminate the falling, clamping risk of artificial handling from the source, reshape the safety efficiency system of screen board replacement, vertical stable rope subassembly forms certain constraint to steel wire rope, reduce the swing of steel wire rope, avoid the collision of screen board.

Description

Technical Field

[0001] This utility model belongs to the field of screen plate hoisting technology, specifically a screen plate hoisting device. Background Technology

[0002] In the production process of coal preparation plants, vibrating screens are the core equipment for material classification and screening. Fixed screens, as part of the screening machine, have no moving parts, and their screen surfaces are fixed. The materials need to move on the screen surface and complete the screening process by relying on their own gravity or external forces. In this working mode, the materials will continuously generate high-frequency impacts and sliding friction on the screen plate surface. In addition, the continuous operation of screening operations leads to a significant acceleration in the wear rate of the fixed screen plates, requiring frequent replacement to maintain screening accuracy.

[0003] Each fixed screen plate measures 719mm × 595mm and weighs 30kg. When changing screen plates, personnel must first enter the fixed screen through an observation port 1.5 meters above the installation surface. Due to the enclosed and narrow interior space of the screen body and the dim lighting, and because the screen plate needs to be moved from the "horizontal installation position" to the "vertical observation port," the operation process is forced to adopt a "multi-person relay" mode. Personnel at the bottom lift the screen plate, personnel in the middle take over, and personnel at the top receive and transport it out.

[0004] During the process of moving and replacing the old sieve plates, manual relay is required to transport them out. Due to the large weight of the sieve plates and the high distance between the observation port and the inside of the fixed sieve, manual handling is dangerous, inefficient, and carries a high safety risk.

[0005] Therefore, a screen plate hoisting device is proposed to address the above problems. Utility Model Content

[0006] To address the problems mentioned in the background art, this utility model provides a screen plate hoisting device, which has the advantages of safe and efficient hoisting operation, precise and stable anti-sway control, and flexible and convenient protective functions.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a screen plate hoisting device, comprising a horizontally arranged crossbeam, A-frames welded to the left and right ends of the crossbeam, a bearing base welded to the bottom of the A-frame, universal wheels symmetrically arranged on the bottom of the bearing base, an electric hoist mounted on the crossbeam, a vertical rope stabilizing assembly corresponding to the wire rope of the electric hoist mounted on the A-frame, and detachable guardrails provided on both the front and rear sides of the A-frame.

[0008] Preferably, the vertical stabilizing rope assembly includes a limiting sleeve fitted onto the wire rope of the electric hoist, with lifting rods fixedly connected to the left and right sides of the limiting sleeve, and a lifting drive structure connected to the far end of the lifting rods.

[0009] Preferably, the end of the wire rope of the electric hoist is connected to a hook, and the limiting sleeve is fitted on the wire rope near the hook.

[0010] Preferably, the inner wall of the limiting sleeve is provided with evenly distributed recesses, and ball bearings are disposed in the recesses.

[0011] Preferably, the lifting drive structure includes a vertical rod fixed to an A-frame, an installation chamber is provided inside the vertical rod, a small motor is provided inside the installation chamber, a lead screw is connected to the output end of the small motor, a threaded sleeve is threadedly connected to the lead screw, and the threaded sleeve is fixedly connected to the lifting rod.

[0012] Preferably, a strip-shaped through groove communicating with the installation chamber is provided on the opposite side of the vertical rod, and the lifting rod passes through the strip-shaped through groove.

[0013] Preferably, the detachable guardrail includes a guardrail bar, and a positioning tube is fixed on the support base at a position corresponding to the guardrail bar, with the bottom end of the guardrail bar inserted into the positioning tube.

[0014] Preferably, a fixed magnet plate is fixed at the bottom of the inner cavity of the positioning tube, and a movable magnet plate corresponding to the fixed magnet plate is fixed at the bottom of the guardrail.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0016] 1. This utility model uses an electric hoist to replace manual relay, which greatly reduces the time spent transporting a single screen plate. The rigid support of the bearing base and the braked universal wheels prevents the equipment from slipping during hoisting, achieving "one-click hoisting and precise positioning". It eliminates the risk of falling and jamming caused by manual handling from the root and reshapes the safety and efficiency system for screen plate replacement.

[0017] 2. The limiting sleeve of the vertical stabilizing rope assembly of this utility model has built-in ball bearings, which replace sliding friction with rolling friction to suppress the lateral swing amplitude of the wire rope and reduce the wear rate of the wire rope. The layout of the limiting sleeve close to the hook, combined with the follow-up design of the lifting drive, forms a constraint in the initial stage of lifting, reducing the probability of collision and jamming between the screen plate and the observation port, ensuring the stability and smoothness of the entire lifting process, and extending the maintenance cycle of the assembly.

[0018] 3. The detachable guardrail of this utility model adopts a magnetic positioning structure, which can be disassembled and assembled on one side within 30 seconds by a single person. It can quickly enclose the working area, completely avoid the risk of unauthorized personnel accidentally entering, and realize dynamic safety management of "installation for protection and disassembly for passage", adapting to diverse operation needs. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the structure of the A-type frame, crossbeam and electric hoist of this utility model;

[0021] Figure 3 This is a cross-sectional view of the limiting sleeve of this utility model;

[0022] Figure 4 This is a schematic diagram of the lifting drive structure of this utility model;

[0023] Figure 5 This is a structural schematic diagram of the detachable guardrail of this utility model.

[0024] In the picture:

[0025] 1. Crossbeam; 2. A-frame; 3. Support base; 4. Casters;

[0026] 5. Electric hoist;

[0027] 51. Steel wire rope; 52. Hook;

[0028] 6. Vertical stabilizing rope assembly;

[0029] 61. Limit sleeve; 62. Lifting rod;

[0030] 63. Lifting drive structure; 631. Vertical rod; 632. Mounting chamber; 633. Small motor;

[0031] 634. Lead screw; 635. Threaded sleeve; 636. Through groove;

[0032] 64. Concave hole; 65. Ball bearing;

[0033] 7. Detachable guardrail;

[0034] 71. Guardrail; 72. Positioning tube; 73. Fixed magnet plate; 74. Movable magnet plate. Detailed Implementation

[0035] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0036] like Figures 1 to 5As shown, this utility model provides a screen plate hoisting device, including a horizontally arranged crossbeam 1. The crossbeam 1 serves as the top load-bearing and connecting core of the device, providing a stable installation foundation for the electric hoist 5. It also connects the two A-frames 2 on both sides into a whole, enhancing the device's anti-overturning ability. A-frames 2 are welded to the left and right ends of the crossbeam 1. The A-frames 2 adopt an A-shaped structure, dispersing the load transmitted by the top crossbeam 1 through the principle of triangular stability, reducing local pressure on the bearing base 3, and improving the overall structural rigidity. The bearing base 3 is welded to the bottom of the A-frame 2, serving as the bottom load-bearing foundation of the device. It integrates the installation positions of the casters 4 and the detachable guardrail 7, evenly transferring the upper load to the ground, while providing a stable support platform for the device's movement. The bottom of the bearing base 3 is equipped with... The device is equipped with casters 4, which have a braking function. These casters allow for flexible adjustment of the device's position and prevent slippage during hoisting once locked, balancing ease of movement with operational stability. An electric hoist 5 is installed on the crossbeam 1, providing a rated lifting capacity of 500 kg. The hoist lifts and lowers the screen plate by winding the wire rope 51, replacing manual handling and significantly improving lifting efficiency. A vertical stabilizing rope assembly 6 is installed on the A-frame 2, corresponding to the wire rope 51 of the electric hoist 5. The vertical stabilizing rope assembly 6 solves the problem of screen plate swaying during hoisting by restraining the lateral swing of the wire rope 51, reducing the risk of collision with the observation port. Removable guardrails 7 are installed on both the front and rear sides of the A-frame 2. These guardrails can quickly enclose the working area, isolate unauthorized personnel, and reduce the risk of being hit by objects or crushed.

[0037] Specifically, the vertical stabilizing rope assembly 6 includes a limiting sleeve 61 fitted onto the wire rope 51 of the electric hoist 5. The inner wall of the limiting sleeve 61 has rolling balls 65 that convert sliding friction into rolling friction, reducing wear on the wire rope 51. At the same time, the small gap fit limits the lateral deviation of the wire rope 51 to ≤5mm. Lifting rods 62 are fixedly connected to the left and right sides of the limiting sleeve 61. The lifting rods 62 are synchronously connected to the limiting sleeve 61 and the threaded sleeve 635, ensuring that the limiting sleeve 61 rises and falls synchronously with the hook 52, restraining the swing of the wire rope 51 throughout the process. The far end of the lifting rod 62 is connected to a lifting drive structure 63. The lifting drive structure 63 drives the lead screw 634 to rotate through a small motor 633, which drives the threaded sleeve 635 and the lifting rod 62 to rise and fall precisely, realizing the height self-adjustment of the limiting sleeve 61 to adapt to different lifting positions.

[0038] Furthermore, the end of the wire rope 51 of the electric hoist 5 is connected to a hook 52, which is compatible with the screen plate lifting device to ensure that the screen plate is firmly connected during hoisting and to prevent it from falling off. The limit sleeve 61 is located on the wire rope 51 near the hook 52. Being close to the lifting point can maximize the reduction of screen plate swaying, especially the restraint effect is more significant for the violent swing at the beginning of the lifting.

[0039] Furthermore, the inner wall of the limiting sleeve 61 is provided with evenly distributed recessed holes 64. The recessed holes 64 provide installation space for the ball bearings 65, ensuring that the ball bearings 65 can rotate flexibly and will not fall off. The ball bearings 65 are installed in the recessed holes 64. The ball bearings 65 reduce the frictional resistance between the limiting sleeve 61 and the wire rope 51, reduce the wear rate of both, and extend the service life.

[0040] It is worth noting that the lifting drive structure 63 includes a vertical rod 631 fixed on the A-frame 2. The vertical rod 631 serves as the mounting carrier for the lifting drive structure 63. The internal chamber protects the motor and lead screw 634 from coal dust contamination, improving the durability of the components. An installation chamber 632 is provided inside the vertical rod 631, and a small motor 633 is installed inside the installation chamber 632. The small motor 633 provides lifting power and realizes the up and down movement of the threaded sleeve 635 through forward and reverse rotation. It is responsive and ensures that the movement of the limit sleeve 61 and the hook 52 is synchronized. The output end of the small motor 633 is connected to the lead screw 634. The lead screw 634 and the threaded sleeve 635 cooperate to form a helical transmission with self-locking properties, which can accurately control the height of the lifting rod 62 and ensure the stable constraint of the limit sleeve 61. The lead screw 634 is threadedly connected to the threaded sleeve 635, and the threaded sleeve 635 is fixedly connected to the lifting rod 62, converting the rotational motion of the lead screw 634 into the vertical linear motion of the lifting rod 62. The threaded sleeve 635 is fixedly connected to the lifting rod 62.

[0041] It is worth noting that a strip-shaped through groove 636 communicating with the installation chamber 632 is provided on the opposite side of the vertical rod 631. The strip-shaped through groove 636 provides a vertical movement channel for the lifting rod 62, while restricting its lateral displacement, ensuring that the lifting rod 62 drives the limiting sleeve 61 to move smoothly vertically, and the lifting rod 62 passes through the strip-shaped through groove 636.

[0042] It is worth mentioning that the detachable guardrail 7 includes a guardrail 71, which can effectively prevent accidental intrusion. The grid structure combines protection and visibility. The support base 3 has a positioning tube 72 fixed at the position corresponding to the guardrail 71. The positioning tube 72 provides precise installation positioning for the guardrail 71, ensuring that the guardrail is vertical and stable and avoids shaking. The bottom end of the guardrail 71 is inserted into the positioning tube 72.

[0043] It is worth emphasizing that a fixed magnet plate 73 is fixed at the bottom of the inner cavity of the positioning tube 72. The fixed magnet plate 73 and the movable magnet plate 74 cooperate to form a magnetic fixation, which enables the quick assembly and disassembly of the guardrail 71. The bottom end of the guardrail 71 is fixed with a movable magnet plate 74 corresponding to the fixed magnet plate 73. The movable magnet plate 74 and the fixed magnet plate 73 are attracted by opposite poles. A single person can complete the installation or disassembly of the guardrail 71 within 30 seconds, which is suitable for temporary protection and rapid evacuation needs.

[0044] Among them, the electric hoist 5 and the small motor 633 are existing technologies and will not be described in detail; at the same time, this utility model also includes power supply, controller and switch, etc., which are not the main technical points of this patent and will not be described in detail.

[0045] Working principle and process: During operation, first move the device to the vicinity of the fixed screen observation port using the casters 4 at the bottom of the support base 3, and lock the casters 4 to prevent slippage. Then, insert the bottom end of the guardrail 71 of the detachable guardrail 7 into the positioning tube 72 on the support base 3. The fixed magnet plate 73 and the movable magnet plate 74 are attracted and fixed to form a protective working area. Then, operate the electric hoist 5 on the crossbeam 1 to lower the wire rope 51 and the hook 52 below the observation port. At the same time, the lifting drive structure 63 of the vertical rope stabilizing assembly 6 is activated, and the small motor 633 drives the lead screw 634 to rotate. The threaded sleeve 635 moves down along the lead screw 634 and drives the limit sleeve 61 along the strip of the vertical rod 631 through the lifting rod 62. The through channel 636 descends synchronously, and the limiting sleeve 61 descends to its lowest point. During lifting, the electric hoist 5 retracts the wire rope 51, and the screen plate rises with the hook 52. The limiting sleeve 61 is positioned on the wire rope 51 at the observation port, which reduces the swaying of the wire rope 51 during lifting. When the hook 52 rises to a position close to the limiting sleeve 61, the limiting sleeve 61 moves upward synchronously under the drive of the lifting drive structure 63. Through a small gap, the wire rope 51 is constrained from lateral swaying, preventing the screen plate from colliding with the observation port. After the screen plate rises above the observation port, the brake of the universal wheel 4 is released, and the push device transfers the screen plate to the designated position. The electric hoist 5 is controlled to slowly lower the screen plate. After the transportation is completed, the protective railing 71 is removed, and the device is moved to the storage area.

[0046] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0047] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A screen plate hoisting device, comprising a horizontally arranged crossbeam (1), characterized in that: A-frames (2) are welded to the left and right ends of the crossbeam (1). A bearing base (3) is welded to the bottom of the A-frame (2). A universal wheel (4) is installed at the bottom of the bearing base (3). An electric hoist (5) is installed on the crossbeam (1). A vertical rope stabilizing assembly (6) corresponding to the wire rope (51) of the electric hoist (5) is installed on the A-frame (2). A detachable guardrail (7) is provided on both the front and rear sides of the A-frame (2).

2. The sieve plate hoisting device according to claim 1, characterized in that: The vertical stabilizing rope assembly (6) includes a limiting sleeve (61) sleeved on the wire rope (51) of the electric hoist (5). Lifting rods (62) are fixedly connected to the left and right sides of the limiting sleeve (61), and a lifting drive structure (63) is connected to the far end of the lifting rods (62).

3. The sieve plate hoisting device according to claim 2, characterized in that: The end of the wire rope (51) of the electric hoist (5) is connected to a hook (52), and the limiting sleeve (61) is located on the wire rope (51) near the hook (52).

4. The sieve plate hoisting device according to claim 2, characterized in that: The inner wall of the limiting sleeve (61) is provided with evenly distributed recesses (64), and ball bearings (65) are provided in the recesses (64).

5. The sieve plate hoisting device according to claim 2, characterized in that: The lifting drive structure (63) includes a vertical rod (631) fixed on the A-frame (2). An installation chamber (632) is provided in the vertical rod (631). A small motor (633) is provided in the installation chamber (632). A lead screw (634) is connected to the output end of the small motor (633). A threaded sleeve (635) is threadedly connected to the lead screw (634). The threaded sleeve (635) is fixedly connected to the lifting rod (62).

6. The sieve plate hoisting device according to claim 5, characterized in that: The vertical rod (631) has a strip-shaped through groove (636) on the opposite side that communicates with the installation chamber (632), and the lifting rod (62) passes through the strip-shaped through groove (636).

7. The sieve plate hoisting device according to claim 1, characterized in that: The detachable guardrail (7) includes a guardrail (71), and a positioning tube (72) is fixed on the bearing base (3) at a position corresponding to the guardrail (71). The bottom end of the guardrail (71) is inserted into the positioning tube (72).

8. A sieve plate hoisting device according to claim 7, characterized in that: A fixed magnet plate (73) is fixed at the bottom of the inner cavity of the positioning tube (72), and a movable magnet plate (74) corresponding to the fixed magnet plate (73) is fixed at the bottom of the guardrail (71).

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