A slot type pulley protection box

Abstract

The application discloses a slot type pulley protection box and relates to the technical field of safety protection of hoisting equipment. The protection box comprises a box body provided with a pulley, the top of the box body is an arch top structure, vertically through accommodation openings are symmetrically formed in the two sides, and a cover plate assembly is arranged in the accommodation openings. The cover plate assembly is composed of a hinged comb plate and a sliding shutter, the hinged comb plate is hinged to the inner wall of the accommodation opening through a pin shaft, the comb teeth of the hinged comb plate are slidingly inserted into the limiting hole channel of the sliding shutter, the sliding shutter is adjustably fixed to the side wall of the box body through bolts, and the sliding shutter can adjust the gap blocking range of the comb teeth along an arc track. The box body adopts a slot splicing structure, and a bottom space for ash leakage is reserved. The application takes into account the radial swing allowance of the hoisted steel wire rope and the dustproof effect, has the advantages of anti-slot falling and easy maintenance, can reduce the silt accumulation of oil sludge, and prolongs the service life of the pulley and the steel wire rope.

Description

Technical Field

[0001] This invention relates to the field of safety protection technology for lifting equipment, specifically a slot-type pulley protection box. Background Technology

[0002] In lifting systems, pulley blocks are the core components that bear and transmit lifting loads. To prevent the intrusion of foreign objects, ensure operational safety, and extend the service life of the components, protective structures are usually installed on the outside of the pulley blocks. Existing crane pulley guards mostly adopt a closed or semi-closed one-piece shell structure, which has significant structural defects in actual working conditions. First, the top opening has poor adaptability, making it difficult to balance protective effect and operational freedom. The top of the protective cover needs to have an opening for the hoisting wire rope to pass through. If the opening size is too large, external dust and debris can easily enter the interior of the cover, mixing with the lubricating grease of the pulley to form sludge accumulation, which will aggravate the wear of the pulley and the wire rope. At the same time, the lateral swing of the wire rope lacks restraint, posing a safety hazard of derailment. If the opening size is too small, it will restrict the normal radial swing of the hoisting wire rope, and the wire rope is prone to friction and scratching with the edge of the opening during operation, accelerating fatigue damage to the wire rope.

[0003] Secondly, disassembly and maintenance are difficult. The integrated or welded fixed protective cover structure is cumbersome to disassemble when inspecting the pulley block and cleaning the internal dust and sludge, resulting in low maintenance efficiency and making it difficult to meet the needs of high-frequency inspections.

[0004] Third, it has poor adaptability to harsh environments. In harsh working environments with dust and oil, the semi-enclosed structure provides insufficient protection, increasing the risk of foreign objects getting stuck in the pulleys. Furthermore, the accumulated dirt inside is difficult to remove, further shortening the service life of the components. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a slot-type pulley protection box. The adjustable sealing of the comb tooth gap is achieved through the interlocking of the hinged comb plate and the sliding cover plate. Under the premise of ensuring that the hoisting wire rope has a reasonable radial movement margin, it effectively prevents dust and sludge from entering the box. At the same time, it has the advantages of convenient disassembly and assembly, preventing the wire rope from going out of the slot, and easy cleaning and maintenance, thus extending the service life of the pulley and the wire rope.

[0006] To achieve the above objectives, the present invention provides a slot-type pulley protection box, including a box body, a pulley for winding a hoisting steel wire rope is rotatably connected inside the box body, and a cover plate assembly for adjusting and covering the vertical penetration path of the hoisting steel wire rope is slidably inserted and plugged into the top of the box body. The cover assembly includes a hinged comb plate and a sliding cover plate. The hinged comb plate is hinged to the opening at the top of the box where the hoisting wire rope passes vertically. The gap between the comb teeth of the hinged comb plate passes vertically through the hoisting wire rope, and the comb teeth of the hinged comb plate are slidably inserted into the sliding cover plate. The sliding cover plate is bolted to the side wall of the box and is used to seal the gap between the comb teeth on the hinged comb plate.

[0007] Preferably, the top of the box is made into an arched structure, and the two sides of the arched structure are symmetrically opposite to each other with vertical through openings, and cover plate assemblies are arranged in the openings.

[0008] Preferably, both the hinged comb plate and the sliding baffle are arc-shaped plates, wherein one side of the hinged comb plate is made of solid plate, and the other side of the hinged comb plate has comb teeth integrally formed. The solid plate of the hinged comb plate is rotatably connected to the inner wall of the clearance opening of the box arch structure by a pin on one side, and the comb teeth of the hinged comb plate extend into the clearance opening in an arc-shaped trajectory. The sliding cover has multiple limiting holes for accommodating the sliding insertion of the comb teeth. The side wall of the sliding cover is bolted to the side wall of the box, and the sliding cover extends into the clearance opening in an arc-shaped trajectory, so that the sliding cover is fitted onto the comb teeth to adjust the gap between the sealing comb teeth according to the diameter of the hoisting wire rope and the swing amplitude.

[0009] The advantages of this invention compared to the prior art are: 1. This invention utilizes the interlocking mechanism of a hinged comb plate and a sliding cover plate to adjust the insertion depth of the sliding cover plate along an arc-shaped trajectory, thereby adjusting the effective sealing area of ​​the comb tooth gap. This structure not only allows for sufficient radial movement space based on the diameter of the hoisting wire rope and the swing amplitude during operation, preventing the wire rope from rubbing against the edge of the housing, but also maximizes the sealing of the clearance opening, effectively preventing external dust and debris from entering the housing, reducing sludge accumulation, and significantly extending the service life of the pulleys and hoisting wire rope.

[0010] 2. The parallel comb tooth structure of the hinged comb plate of the present invention can form a lateral constraint on the hoisting wire rope, limit the excessive swing of the wire rope, structurally reduce the probability of the wire rope coming out of the pulley groove, and improve the safety and reliability of the hoisting operation.

[0011] 3. The top cover assembly of this invention adopts a combination of sliding plug-in and hinged assembly. During maintenance, the sliding cover can be slidably pulled out by loosening the adjusting bolt, or the hinged comb plate can be flipped open by rotating around the pin shaft to quickly open the clearance opening. At the same time, the main body of the box adopts a slot splicing structure of sliding cover and hinged comb plate. The upper sliding cover can be pulled out and disassembled as a whole, which facilitates comprehensive maintenance of the pulley group and cleaning of internal sludge, greatly reducing maintenance difficulty and improving work efficiency.

[0012] 4. The present invention has a fully enclosed shell structure with a high level of protection, which can effectively prevent foreign objects from blocking the pulley; with the dust leakage space reserved at the bottom, the dust and oil stains accumulated inside can fall and be discharged naturally, solving the problem of difficult cleaning of dirt inside the closed structure, and is suitable for harsh working environments with high dust and high oil stains. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a cross-sectional view of the present invention; Figure 3 This is a cross-sectional structural diagram of the sliding cover of the present invention; In the diagram: 1-box body; 2-lifting wire rope; 3-hinged comb plate; 4-comb teeth; 5-comb tooth gap; 6-clearance opening; 7-sliding cover plate; 8-bolt; 9-pulley; 10-pin; 11-limiting hole. Detailed Implementation

[0015] The embodiments of this application are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0016] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0017] The present invention will now be described in further detail with reference to the accompanying drawings.

[0018] Combination Figures 1-3As shown, this embodiment provides a slot-type pulley protection box, including a box body 1. A pulley 9 is rotatably mounted inside the box body 1. A hoisting steel wire rope 2 is wound around the pulley 9. A cover plate assembly is provided on the top of the box body 1. The cover plate assembly realizes adjustable coverage of the vertical penetration path of the hoisting steel wire rope 2.

[0019] The cover assembly includes a hinged comb plate 3 and a sliding cover plate 7. The hinged comb plate 3 is hinged to the top of the housing 1 via a pin 10, at an open position through which the hoisting wire rope 2 passes. The hinged comb plate 3 has several comb teeth 4, with gaps 5 between adjacent comb teeth 4. The hoisting wire rope 2 passes downwards through the gaps 5 into the housing 1 and wraps around the rope groove of the pulley 9. The comb teeth 4 of the hinged comb plate 3 slide into the limiting holes 11 of the sliding cover plate 7. The sliding cover plate 7 is adjustablely mounted to the side wall of the housing 1 via bolts 8. The size of the gaps 5 can be adjusted by the sliding displacement of the sliding cover plate 7.

[0020] The top of the box body 1 is formed into an arch structure. On both sides of the arch structure, vertically penetrating clearance openings 6 are opened symmetrically in opposite directions. Two sets of cover plate components are respectively assembled in the two clearance openings 6, corresponding to the two sections of hoisting steel wire rope 2 of the pulley 9 entering and exiting the rope.

[0021] Both the hinged comb plate 3 and the sliding cover plate 7 are arc-shaped plates that match the curvature of the arch. One end of the hinged comb plate 3 is a solid plate segment, and the other end is an integrally formed comb tooth 4. The solid plate segment of the hinged comb plate 3 is rotatably installed on the inner wall of the relief opening 6 through the pin shaft 10, and the comb tooth 4 extends into the relief opening 6 along the arc trajectory. Multiple limiting holes 11 are opened inside the sliding cover plate 7, and the limiting holes 11 correspond one-to-one with the comb tooth 4. The comb tooth 4 can slide smoothly inside the limiting holes 11. The side wall of the sliding cover plate 7 is locked and fixed to the side wall of the box body 1 by bolts 8. The sliding cover plate 7 also extends into the relief opening 6 along the arc trajectory, and the sliding cover plate 7 is sleeved on the outside of the comb tooth 4.

[0022] After loosening bolt 8, the sliding cover 7 can slide along the arc-shaped extension direction of the comb teeth 4, thereby changing the range of the sliding cover 7 covering the comb tooth gap 5. The actual flow opening size of the comb tooth gap 5 can be adjusted according to the diameter of the hoisting wire rope 2 on site and the swing amplitude of the wire rope under working conditions. When the wire rope diameter is large and the swing amplitude is large, the sliding cover 7 is pulled outward to expand the effective opening of the comb tooth gap 5, leaving sufficient radial swing margin for the hoisting wire rope 2 and avoiding scratches and wear between the wire rope and the protective box. When the wire rope diameter is small and the swing amplitude is small, the sliding cover 7 is pushed inward to reduce the exposed gap of the comb tooth gap 5, maximizing the prevention of external dust, oil and impurities from entering the box 1 through the clearance port 6 and the comb tooth gap 5, reducing the accumulation of sludge inside the box, and protecting the pulley 9 and the hoisting wire rope 2. After the position is adjusted to the correct position, tighten bolt 8 to lock the position of the sliding cover 7.

[0023] In this embodiment, the housing 1 is a slot-assembled fully enclosed shell, composed of four parts: left and right hinged comb plates, and left and right sliding cover plates. The left and right hinged comb plates are respectively hinged between the two vertical plates on both sides of the pulley block (leaving space inside the wall); after the left and right hinged comb plates are assembled, a gap of about 50cm is left at the bottom. This gap serves as a dust leakage space, allowing the mixture of dust and oil that falls into the housing 1 to fall out and be discharged, preventing dirt from accumulating inside the housing for a long time and causing pulley jamming.

[0024] The left and right sliding cover plates are respectively inserted and assembled onto the left and right hinged comb plates through a limiting hole structure. The sliding cover plates and the hinged comb plates can be quickly assembled and disassembled by the limiting holes. The left and right sliding cover plates are connected and fixed at their mating positions by pins. In this embodiment, the arched structure of the box body is composed of the left and right sliding cover plates, and the clearance opening 6 is opened at the arched position formed by the left and right sliding cover plates.

[0025] There are multiple operating modes for equipment inspection and maintenance: The first method is simple inspection and observation: loosen the bolt 8, slide the sliding cover 7 outward along the comb teeth 4 and pull it out. The hinged comb plate 3 can be flipped outward around the pin shaft 10 and opened. The clearance port 6 is fully open. The operator can directly observe the running status of the pulley 9 and the hoisting wire rope 2 inside the box 1 through the clearance port 6 without disassembling the entire protective box.

[0026] The second method involves in-depth inspection and cleaning: Remove the pins from the left and right hinged comb plates, loosen the bolts, and remove the entire cover assembly to create a clearance opening. The upper part of the housing can be fully opened, allowing direct inspection and replacement of parts for the pulley 9. Simultaneously, thoroughly clean the oil sludge and dust accumulated on the inner wall of the housing and the surface of the pulley. After inspection, align the left and right sliding covers with the hinged comb plate slots and insert them downwards into place. Insert the pins to restore the housing. Then, rotate the hinged comb plate 3 back to its original position, align the comb teeth 4 with the limiting holes 11 of the sliding cover 7, and insert them. Adjust the position of the sliding cover 7 according to the wire rope working conditions, then tighten the bolts 8 to complete the assembly.

[0027] The comb teeth 4 on the hinged comb plate 3 can also provide lateral restraint for the lifting wire rope 2, limiting excessive lateral displacement of the lifting wire rope 2, reducing the risk of the wire rope coming off the pulley 9 groove, and improving the safety performance of lifting operations. The overall fully enclosed box structure can prevent large foreign objects from entering the box and prevent pulley jamming. At the same time, combined with the bottom dust leakage space, dirt can be discharged automatically, making it suitable for harsh lifting operation conditions with high dust and heavy oil, and extending the service life of pulley 9 and lifting wire rope 2.

[0028] Finally, any aspects not fully described in this invention utilize existing mature products and technologies.

[0029] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the spirit of the invention, such designs should fall within the protection scope of the present invention.

Claims

1. A slot-type pulley protective box, comprising a box body, wherein a pulley for winding a hoisting steel wire rope is rotatably connected inside the box body, characterized in that: The top of the enclosure is slidably plugged in and connected to a cover plate assembly that adjusts the vertical penetration path of the hoisting wire rope. The cover plate assembly includes a hinged comb plate and a sliding cover plate. The hinged comb plate is hinged to the opening at the top of the box where the hoisting steel wire rope passes vertically. The gap between the comb teeth of the hinged comb plate passes vertically through the hoisting steel wire rope, and the comb teeth of the hinged comb plate are slidably inserted into the sliding cover plate. The sliding cover plate is bolted to the side wall of the box and is used to seal the gap between the comb teeth on the hinged comb plate.

2. The slot-type pulley protection box according to claim 1, characterized in that: The top of the box is made into an arched structure, and vertical through openings are symmetrically opened on both sides of the arched structure. Cover plate assemblies are arranged in the through openings.

3. The slot-type pulley protection box according to claim 2, characterized in that: Both the hinged comb plate and the sliding cover plate are arc-shaped plates, with one side of the hinged comb plate being a solid plate and the other side of the hinged comb plate having comb teeth integrally formed.

4. A slot-type pulley protection box according to claim 3, characterized in that: The solid plate of the hinged comb plate is rotatably connected to the inner wall of the clearance opening of the box arch structure by a pin on one side, and the comb teeth of the hinged comb plate extend into the clearance opening in an arc-shaped trajectory.

5. A slot-type pulley protection box according to claim 3, characterized in that: The sliding cover has multiple limiting holes for accommodating the sliding insertion of the comb teeth. The side wall of the sliding cover is bolted to the side wall of the box, and the sliding cover extends into the clearance opening in an arc-shaped trajectory, so that the sliding cover is fitted onto the comb teeth to adjust the gap between the comb teeth according to the diameter of the hoisting wire rope and the swing amplitude.

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