Special lifting appliance for lifting heavy object in closed corridor

Abstract

Provided is a special lifting appliance for lifting a heavy object in a closed corridor, comprising a track (3), a lifting box (12), and a lifting hook (4). The track (3) is fixed to the bottom of a stair bottom plate (1) of a corridor, a hollow slide groove is formed in the middle of the track (3) in the length direction of the track (3), and a toothed rail (7) is provided on one side of the track (3) in the length direction of the track (3); the lifting box (12) is slidably mounted in the slide groove, a crawling gear (8) engaged with the toothed rail (7) is provided on one side of the lifting box (12), an operation chain (6) is provided on the other side of the lifting box (12), and the operation chain (6) is connected to the crawling gear (8) by means of a transmission mechanism; the lifting hook (4) is mounted on the lifting box (12). The lifting appliance can solve the problem that for closed corridors of some power plants, there is no elevator to directly reach, or there is no object lifting hole to directly reach, so that a heavy material such as a part, a device, and a spare can only be carried by a person, reduces carrying difficulty, improves working efficiency, and reduces personal injury and device damage risks, and the lifting appliance has a simple structure, achieves reliable lifting and firm fixing, and is easy and convenient to operate.

Description

A special lifting device for lifting heavy objects in closed corridors Technical Field

[0001] The utility model relates to the technical field of production, operation and maintenance of hydropower plants, in particular to a special lifting device for lifting heavy objects in closed corridors. Background Art

[0002] During the operation, maintenance, and overhaul of hydropower plants, it is necessary to move parts, equipment, spare parts, and other materials. When these materials are heavy, they are usually lifted to the designated location through lifting holes using lifting machinery, or transported to the destination using elevators and manual forklifts. However, some power plants lack direct elevator access or lifting holes, forcing manual transport through stairways. When moving heavy objects, narrow stairways limit the number of people required to carry them, making it difficult and dangerous to do so. This poses significant safety risks and can easily lead to injuries and equipment damage.

[0003] In view of this, the present utility model is proposed. Utility Model Content

[0004] The purpose of the utility model is to provide a special lifting device for lifting heavy objects in a closed corridor, which can solve the problems mentioned in the above background technology.

[0005] The utility model provides a special lifting device for lifting heavy objects in a closed corridor, comprising: a track, a hanging box and a hook; the track is fixed to the bottom of the staircase floor of the corridor, a hollow slide groove is provided in the middle of the track along its length direction, and a rack rail is provided on one side of the track along its length direction;

[0006] The hanging box can be slidably installed in the slide groove. One side of the hanging box has a crawling gear engaged with the rack rail, and the other side of the hanging box is provided with an operating chain. The operating chain is connected to the crawling gear through a transmission mechanism; the hook is installed on the hanging box.

[0007] Preferably, the transmission mechanism includes: a worm, a manual gear and an operating sprocket; the creeping gear is engaged with the worm, the worm is engaged with the manual gear, the manual gear rotates coaxially with the operating sprocket, and the operating chain is mounted on the operating sprocket.

[0008] Preferably, the worm and the hand-operated gear are located inside the hanging box.

[0009] Preferably, the worm is fixed in the hanging box via a bearing.

[0010] Preferably, the operating chain wheel is located outside the hanging box.

[0011] Preferably, the track is fixed to the bottom of the stair base plate by expansion bolts.

[0012] Preferably, a protruding mounting plate is provided at the front end of the hanging box, and the crawling gear is rotatably mounted on the mounting plate, and the crawling gear is meshed with the rack.

[0013] Preferably, sliders adapted to the slide grooves are respectively provided on the top and bottom of the hanging box.

[0014] Preferably, ratchets are provided on the upper and lower sides of the hanging box, and the ratchets can be pressed tightly against the rack rail.

[0015] Preferably, a spring is provided on one side of the ratchet, and a tenon is provided on the other side of the ratchet. Beneficial effects

[0016] The technical solution of the present invention is to fix the track to the bottom of the stair floor in the corridor, set a sliding hoisting box on the track, hang the object to be hoisted on the hook of the hoisting box, pull the operating chain to drive the transmission mechanism to drive the hoisting box to move on the track, so as to solve the problem that some power plants have closed corridors without direct elevators or direct hoisting holes, and can only rely on manpower to carry heavy parts, equipment, spare parts and other materials. The difficulty of transportation is greatly reduced, the work efficiency is improved, and the risk of personal injury and equipment damage is reduced. In addition, the hoist has a simple structure, reliable lifting, firm fixation and easy operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] FIG1 is a schematic diagram of the structure of a special lifting device for lifting heavy objects in a closed corridor provided by the present invention;

[0019] FIG2 is an enlarged view of point A in FIG1.

[0020] Explanation of the accompanying reference numerals: 1. Stair base plate; 2. Expansion bolt; 3. Track; 4. Hook; 5. Operating chain wheel; 6. Operating chain; 7. Rack rail; 8. Crawling gear; 9. Bearing; 10. Worm; 11. Hand-operated gear; 12. Hanging box; 13. Ratchet; 14. Tenon; 15. Spring. DETAILED DESCRIPTION

[0021] The following will clearly and completely describe the technical solutions of the present invention in conjunction with the embodiments. Obviously, the embodiments described are only a part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0023] In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present utility model, "multiple" means two or more, unless otherwise clearly and specifically defined. In addition, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a communication between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to the specific circumstances.

[0024] As shown in Figures 1 to 2, this embodiment provides a special lifting device for lifting heavy objects in a closed corridor, including: a track 3, a hanging box 12 and a hook 4; the track 3 is fixed to the bottom of the stair floor 1 of the corridor to ensure that the structural strength meets the lifting requirements. After the installation is completed, the maximum lifting weight that can be borne under the structural conditions is approved according to calculation; the track 3 is provided with a hollow slide groove in the middle along its length, and the track 3 is provided with a rack rail 7 on one side along its length; the hanging box 12 is slidably installed in the slide groove, and one side of the hanging box 12 has a crawling gear 8 that meshes with the rack rail 7. The crawling gear 8 moves between the rack rail 7 to drive the object to be lifted to move up or down the stairs; the other side of the hanging box 12 is provided with an operating chain 6, which is connected to the crawling gear 8 through a transmission mechanism; the hook 4 is installed on the hanging box 12, and the heavy object to be lifted is hung on the hook 4 through a wire rope or a lifting rope in conjunction with a hand winch.

[0025] In this embodiment, a track 3 is fixed to the bottom of the staircase floor 1 in the corridor, a slidable hoisting box 12 is provided on the track 3, the object to be hoisted is hung on the hook 4 of the hoisting box 12, and the operating chain 6 is pulled to drive the transmission mechanism to drive the hoisting box 12 to move on the track 3. This solves the problem of relying on manpower to carry heavy parts, equipment, spare parts, and other materials due to the lack of direct elevator access or direct access to lifting holes in the closed corridors of power plants. In this embodiment, the use of this hoist can complete the handling of objects weighing 150kg, greatly reducing the difficulty of handling, improving work efficiency, and reducing the risk of personal injury and equipment damage. In addition, the hoist has a simple structure, reliable lifting, firm fixation, and easy operation.

[0026] In this embodiment, the transmission mechanism includes a worm 10, a manual gear 11, and an operating sprocket 5. The creeper gear 8 meshes with the worm 10, which in turn meshes with the manual gear 11. The manual gear 11 rotates coaxially with the operating sprocket 5, and the operating chain 6 is mounted on the operating sprocket 5. Pulling the operating chain 6 causes the operating sprocket 5 and the manual gear 11 to rotate synchronously, transmitting force through the worm 10 to the creeper gear 8. The creeper gear 8 rotates and meshes with the rail teeth 7, causing the mechanism to begin moving up or down.

[0027] In this embodiment, the worm 10 and the manual gear 11 are located inside the hanging box 12 .

[0028] In this embodiment, the worm 10 is fixed in the hanging box 12 through the bearing 9 .

[0029] In this embodiment, the operating sprocket 5 is located outside the hanging box 12 .

[0030] In this embodiment, the track 3 is fixed to the bottom of the stair base plate 1 by expansion bolts 2 .

[0031] In this embodiment, a protruding mounting plate is provided at the front end of the hanging box 12, and the creeper gear 8 is rotatably mounted on the mounting plate, and the creeper gear 8 is meshed with the rack 7. In the specific use process, preferably, the hanging box 12 and the rack 7 should be regularly greased to ensure stable operation.

[0032] In this embodiment, sliders adapted to the slide grooves are respectively provided on the top and bottom of the hanging box 12 .

[0033] In this embodiment, ratchets 13 are provided on the upper and lower sides of the hoisting box 12. The ratchets 13 can press against the rack rail 7. A spring 15 is provided on one side of the ratchet 13, and a latch 14 is provided on the other side of the ratchet 13. This ensures that the object can only move in one direction during lifting. If the object slips, the ratchets 13 can immediately engage the rack rail 7 to avoid danger. Depending on whether the lifting method is upward or downward, the ratchets 13 and latches 14 are adjusted so that they act on one side of the rack rail 7, ensuring that the object can only move in one direction during lifting. If slipping occurs, the mechanism can be locked immediately to avoid danger.

[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A special lifting device for lifting heavy objects in a closed corridor, characterized in that: include: Track, hanging box and hook; the track is fixed to the bottom of the staircase floor of the corridor, a hollow slide groove is arranged in the middle of the track along its length direction, and a rack track is arranged on one side of the track along its length direction; The hanging box can be slidably installed in the slide groove. One side of the hanging box is provided with a crawling gear meshing with the rack rail, and the other side of the hanging box is provided with an operating chain, and the operating chain is connected with the crawling gear through a transmission mechanism; the hook is installed on the hanging box.

2. The special lifting device for lifting heavy objects in a closed corridor according to claim 1 is characterized in that: The transmission mechanism comprises: a worm, a manual gear and an operating chain wheel; the creeping gear is meshed with the worm, the worm is meshed with the manual gear, the manual gear rotates coaxially with the operating chain wheel, and the operating chain is mounted on the operating chain wheel.

3. The special lifting device for lifting heavy objects in a closed corridor according to claim 2 is characterized in that: The worm and the hand-operated gear are located inside the hanging box.

4. The special lifting device for lifting heavy objects in a closed corridor according to claim 3 is characterized in that: The worm is fixed in the hanging box through a bearing.

5. The special lifting device for lifting heavy objects in a closed corridor according to claim 2 is characterized in that: The operating chain wheel is located outside the hanging box.

6. The special lifting device for lifting heavy objects in a closed corridor according to claim 1, characterized in that: The track is fixed to the bottom of the staircase floor through expansion bolts.

7. The special lifting device for lifting heavy objects in a closed corridor according to claim 1, characterized in that: The front end of the hanging box is provided with a protruding mounting plate, the creeping gear is rotatably mounted on the mounting plate, and the creeping gear is meshed with the rack.

8. The special lifting device for lifting heavy objects in a closed corridor according to claim 1, characterized in that: The top and bottom of the hanging box are respectively provided with sliding blocks adapted to the sliding grooves.

9. The special lifting device for lifting heavy objects in a closed corridor according to claim 1, characterized in that: Ratchets are arranged on the upper and lower sides of the hanging box, and the ratchet teeth can be pressed tightly against the rack rail.

10. The special lifting device for lifting heavy objects in a closed corridor according to claim 9, characterized in that: A spring is arranged on one side of the ratchet, and a tenon is arranged on the other side of the ratchet.

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