CN219822701U - Steel pipe conveyer - Google Patents

Abstract

The utility model relates to a steel pipe conveying device, belongs to the technical field of high-rise construction of constructional engineering, and is mainly used for conveying a disc buckle type steel pipe in an overhanging beam platform. The technical problem solved by the utility model is to provide a steel pipe conveying device which comprises a power traction assembly, a conveying trolley and a conveying rail; the transportation rail comprises two parallel guide steel pipes, one end of the transportation rail, which is close to the main building, is higher than one end of the transportation rail, which is close to the cantilever beam platform, and the guide steel pipes are arranged above the cantilever beam platform and the main building through the support frame; the transport trolley comprises a frame and a steel pipe bracket which are detachably connected; the power traction assembly is arranged on the transportation track, a smooth transportation path is provided through the transportation track, so that the problem that the mechanical transportation cannot span the height difference between the cantilever beam platform and the main building is solved, the transportation track, the frame and the steel pipe bracket can be assembled by adopting on-site steel pipes, the construction cost is reduced, the power traction assembly drives the transportation trolley to move, and the labor input is reduced.

Description

Steel pipe conveyer

Technical Field

The utility model relates to the technical field of high-rise construction of constructional engineering, in particular to a steel pipe conveying device.

Background

In the construction process of high-rise buildings, in order to facilitate the lifting of steel pipe materials by a tower crane, an overhanging beam platform is usually arranged on the outer side of a main building through foundation bolts for lifting construction materials; when the building construction is carried out, the indoor formwork support basically adopts a disc buckle type steel pipe scaffold, after the formwork is disassembled, the disc buckle type steel pipe is transported to other floors for continuous use, the length of the disc buckle type steel pipe scaffold is shorter, if transportation machinery such as a forklift is adopted for transportation, the cost is higher, and the height difference exists between the overhanging type platform and a main building, the transportation machinery such as the forklift cannot directly transport the steel pipe to the liftable range of a tower crane on the overhanging type platform, and furthermore, the dead weight of the transportation machinery is larger, when the steel pipe is transported to the overhanging type unloading platform, the bearing of the overhanging type unloading platform is increased, the overhanging type unloading platform is possibly unstable, and great potential safety hazards exist; if the steel pipes are manually conveyed to the overhanging type unloading platform for stacking neatly, the steel pipes are lifted by the tower crane, so that time and labor are wasted, and a large amount of labor is consumed.

Disclosure of Invention

The utility model aims to solve the technical problem of providing a steel pipe conveying device which is mainly used for conveying steel pipes of a disc buckle type steel pipe scaffold in a building to an overhanging type unloading platform in the construction process of a high-rise building, and can temporarily assemble the steel pipes on a construction site to form the steel pipe conveying device, so that the purposes of convenience in assembly, convenience in steel pipe conveying and low conveying cost are realized.

The utility model discloses a steel pipe conveying device, which comprises a power traction assembly, a conveying trolley and a conveying rail, wherein the conveying rail is arranged above a cantilever beam platform, and one end of the conveying rail extends to the upper part of a main building at the inner side of the cantilever beam platform;

the transportation rail comprises two guide steel pipes which are arranged in parallel, one end of the transportation rail, which is close to a main building, is higher than one end of the transportation rail, which is close to the cantilever beam platform, and the guide steel pipes are supported and arranged above the cantilever beam platform and the main building through a plurality of supporting frames which are arranged at intervals along the guide steel pipes and are formed by splicing the steel pipes;

the transport trolley comprises a frame and a steel pipe bracket, wherein the frame is formed by steel pipes, the frame is in sliding connection with the guide steel pipes through U-shaped rail wheels, and the steel pipe bracket is detachably connected with the frame;

the power traction assembly is arranged at one end of the transportation rail, which is positioned in the main building, and is connected with the frame so as to drive the transportation trolley to move along the rail.

Further, the support frame includes two stands and sets up two the stull between the stand, the stull with two stand interconnect forms shape structure, two the direction steel pipe sets up respectively in the both ends top of stull to be connected with the stand at both ends through right angle fastener respectively.

As a preferable mode, the U-shaped rail wheel is rotatably connected below the roller frame, and a connecting section for connecting the U-shaped rail wheel with the frame is arranged above the roller frame;

the frame comprises a longitudinal rod and a transverse rod, two ends of the longitudinal rod are respectively connected with the connecting section and are arranged above the guide steel pipes in parallel, and the transverse rod is parallel to the transverse support and is arranged above the two longitudinal rods and is clamped on two sides of the connecting section.

Further, the frame also comprises a steel plate, the steel plate penetrates through the connecting section and is arranged above the cross rod to form a platform for placing the steel pipe bracket, the steel pipe bracket is a frame type frame formed by connecting and enclosing a plurality of vertical steel pipes, a plurality of longitudinal steel pipes and a plurality of transverse steel pipes, and the upper end of the connecting section is inserted into the lower end of the vertical steel pipes.

Further, the power traction assembly comprises a hand winch arranged at one end of the transportation track in the main building, and the output end of the hand winch is connected with the frame through a steel strand.

As a preferred mode, the power traction assembly further comprises a fixed end, one end of the frame, which is close to the hand winch, is provided with a movable pulley through a connecting frame, the steel strand bypasses the movable pulley, one end of the steel strand is connected with the fixed end, and the other end of the steel strand is connected with the output end of the hand winch.

The steel pipe conveying device provided by the utility model has the following beneficial effects:

according to the steel pipe conveying device, the steel pipes on site are assembled to form the conveying rail, the frame and the steel pipe bracket, the frame is in sliding connection with the conveying rail through the pulley assembly, and the power traction assembly drives the conveying trolley to move along the conveying rail, so that the disc buckle type steel pipes placed in the steel pipe bracket are conveyed to the cantilever beam platform to facilitate tower crane conveying; because the adopted transportation trolley is formed by splicing the steel pipes and the pulley assemblies on the construction site, the weight is small, and the transportation rail spans the cantilever beam platform and the main building, a smooth transportation path is provided for the transportation trolley, and further the problems that the mechanical transportation cannot span the height difference between the cantilever beam platform and the main building, and the construction safety hidden trouble of unstable cantilever beam is caused after the mechanical transportation of the cantilever beam platform are solved, and meanwhile, the power traction assembly drives the transportation trolley to move, so that the labor input is reduced; moreover, as the transportation rail, the frame and the steel pipe bracket are assembled by the existing steel pipes on the construction site, the construction cost is reduced.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is a schematic diagram showing the structure of the present utility model;

FIG. 3 is a schematic view of the structure of the transportation rail and the frame of the present utility model;

FIG. 4 is a schematic view of the pulley assembly of the present utility model;

fig. 5 is a schematic view of another power traction assembly of the present utility model in use.

Reference numerals: 1-a transportation platform; 11-cantilever beam platform; 12-anchor bolts; 13-main building; 2-a transportation track; 21-stand columns; 22-guiding steel pipes; 23-cross braces; 3-a power traction assembly; 31-hand winch; 32-a steel wire rope; 33-a fixed end; 4-a frame; 41-pulley assembly; 411-linkage segment; 412-a roller frame; 413-bolts; 414-U-shaped rail wheels; 42-a vertical rod; 43-cross bar; 44 steel plates; 45-connecting frames; 451-a movable pulley; 5-a steel pipe bracket; 51-vertical steel pipes; 52-longitudinal steel pipes; 53-transverse steel pipes; 6-a disc buckle type steel tube.

Detailed Description

As shown in fig. 1 or fig. 2, a steel pipe transporting device comprises a power traction assembly 3, a transporting trolley and a transporting rail, wherein the transporting rail is arranged above a cantilever beam platform 11, and one end of the transporting rail extends to the upper part of a main building 13 inside the cantilever beam platform 11; the transportation track 2 comprises two parallel guide steel pipes 22, one end of the transportation track 2 close to the main building 13 is higher than one end close to the cantilever beam platform 11, and the guide steel pipes 22 are supported and arranged above the cantilever beam platform 11 and the main building 13 through a plurality of support frames which are arranged at intervals along the guide steel pipes 22 and are formed by splicing the steel pipes; the transport trolley comprises a frame 4 and a steel pipe bracket 5, wherein the frame 4 is formed by steel pipes, the frame 4 is in sliding connection with the guide steel pipes 22 through U-shaped rail wheels 414, and the steel pipe bracket 5 is detachably connected with the frame 4; the power traction assembly is arranged at one end of the transportation rail 2 positioned in the main building 13 and is connected with the frame 4 so as to drive the transportation trolley to move along the transportation rail 2.

One end of the cantilever beam platform 11 is connected with the main building 13 through the foundation bolts 12, the other end extends outwards, the whole structure formed by combining the cantilever beam platform 11 and the main building 13 is named as a transportation platform 1, as the cantilever beam platform 11 is provided with a certain height, when the cantilever beam platform 11 is connected with the main building 13, a section of height difference which is equal to the height of the cantilever beam platform 11 is always existed, and the transportation track 2 consisting of steel pipes is arranged on the transportation platform 1, namely the cantilever beam platform 11 and the main building 13, the transportation track 2 comprises two guide steel pipes 22 which are arranged in parallel, so that a flat transportation surface is formed to facilitate the sliding of a transportation trolley, because one end of the transportation rail 2, which is close to the main building 13, is higher than one end, which is close to the cantilever beam platform 11, when the transportation trolley is placed on the transportation rail 2, the transportation trolley can slide to the cantilever beam platform 11 through self gravity without excessive extra power for starting, meanwhile, the guide steel pipes 22 are supported and arranged on the transportation platform 1 through supporting frames which are arranged at intervals along the guide steel pipes 22 and are formed by splicing the steel pipes, the height of the transportation rail 2, namely the guide steel pipes 22, from the transportation platform is controlled through arranging the supporting frames, and a fulcrum is provided for the guide steel pipes 22, so that the installation and the bearing are facilitated, and the supporting frames can be formed by splicing the steel pipes through right-angle fasteners; the transport trolley consists of a frame 4 and a steel pipe bracket 5 and is in sliding connection with the guide steel pipe 22 through a U-shaped rail wheel 414, besides the U-shaped rail wheel, rail wheels which are matched with the steel pipe such as an H-shaped rail wheel or a V-shaped rail wheel can be adopted, meanwhile, the frame 4 and the steel pipe bracket 5 formed by the steel pipe of the transport trolley are in detachable connection, the concrete detachable connection mode can be realized by connecting the steel pipe bracket 5 with the frame 4 through a fastener, and the detachable connection can also be realized by adopting an inserting connection mode; when the transport trolley transports the coiled steel pipe 6 to the cantilever beam platform for unloading, the tower crane can directly hoist the steel pipe bracket 5 together with the coiled steel pipe 6 to another construction installation site to directly assemble the steel pipe bracket with the frame of another transport trolley into a whole, manual stacking is not needed again, and labor cost and stacking time are saved; secondly, because the frame 4 and the steel pipe bracket 5 are assembled by steel pipes, the self gravity is small, and the pressure limit of the cantilever beam platform 11 is not exceeded when the cantilever beam platform 11 is transported to the cantilever beam platform 11 through the transportation rail 2, so that the safety and the stability of the cantilever beam platform are ensured; moreover, the movement of the transportation trolley is controlled by the power traction component 3 arranged at one end of the transportation rail 2 in the main building 13, for example, when the transportation trolley needs to transport the coiled steel pipe 6 from the main building 13 to the cantilever beam platform 11, namely, from high to low, the sliding speed of the transportation trolley is controlled by the power traction component 3, so that the transportation rail 2 is prevented from being quickly flushed out due to the fact that the transportation trolley slides down by self gravity; when the transport trolley needs to transport the disc buckle type steel pipe 6 from the cantilever beam platform 11 to the main building 13, namely from low to high, the transport trolley is pulled into the main building 13 by providing traction force for the transport trolley through the power traction assembly 3, so that the gravity of the transport trolley is reduced; the power traction assembly 3 is connected with the frame 4 to drive the transportation trolley to move along the transportation track 2, meanwhile, as one end of the transportation track 2, which is close to the main building 13, is higher than one end, which is close to the cantilever beam platform 11, when the coiled pipe type steel pipe needs to be transported to the cantilever beam platform 11, the transportation trolley can transport the coiled pipe type steel pipe to the cantilever beam platform through self gravity, in order to control the transportation speed and the transportation position of the transportation trolley, the transportation trolley can be controlled through the power traction assembly 3 arranged in the main building 13, when the coiled pipe type steel pipe needs to be transported to the main building 13 from the cantilever beam platform 11, the transportation trolley is pulled into the main building 13 through the power traction assembly 3, and then the steel pipe bracket 5 and the coiled pipe type steel pipe are transported to a construction position together through a forklift; the traction assembly 3 can be connected with the transportation trolley through a traction rope or a steel wire rope by adopting a winch or a hand winch. The whole transportation link does not need manual transportation, so that the labor cost is saved, and meanwhile, the transportation rail 2, the frame 4 and the steel pipe bracket 5 in the transportation device are all assembled by adopting the steel pipes on the construction site, so that the material cost is low, and the materials are easy to obtain; adopt this steel pipe conveyer to carry out steel pipe transportation, not only efficient and safe.

In order to facilitate the disassembly and assembly of the support frame and ensure the stability and the bearing capacity of the transportation track 2, as shown in fig. 3, the support frame comprises two upright posts 21 and a cross brace 23 arranged between the two upright posts, the cross brace 23 and the two upright posts 21 are mutually connected to form a -shaped structure, and two guide steel pipes are respectively arranged above two ends of the cross brace 23 and are respectively connected with the upright posts 21 at the two ends through right-angle fasteners, so that the support and the fixation of the guide steel pipes are realized and the displacement of the guide steel pipes is prevented; the guide steel pipes 22 are arranged along the radial direction of the transportation platform 1, one end of each guide steel pipe extends into the main building 13, the other end of each guide steel pipe extends onto the cantilever beam platform 11, a plurality of supporting frames are sequentially arranged below the two guide steel pipes 22 at intervals and used for supporting the guide steel pipes 22, and a supporting frame close to one side of the main building 13 is higher than a supporting frame close to one side of the cantilever beam platform 11 so as to form a transportation track 2 with one end higher and one end lower; the guide steel pipes 22 are supported by a plurality of supporting frames, so that the guide steel pipes 22 are prevented from being overlong to bend, and are mutually matched to form an integral frame so as to support the guide steel pipes 22; in addition, in order to limit the travelling route of the transportation trolley, the upright posts 21 in the group of support frames positioned at the outermost end of the cantilever beam platform 11 are far higher than the height of the guide steel pipes 22, so as to limit the travelling of the transportation trolley and prevent the transportation trolley from rushing out of the transportation rail 2; furthermore, for guaranteeing the stability of stand 21, can set up the jacking below every stand 21, the lead screw diameter on the jacking is less than the pipe diameter of stand 21 for stand 21 can peg graft with the lead screw on the jacking, and the height adjustment of stand 21 is carried out to the usable jacking simultaneously, is convenient for adjust the high position of direction steel pipe 22.

In order to enable the U-shaped rail wheel 414 matched with the guide steel pipe 22 and the frame 4 spliced by the steel pipe to be matched with each other and stably move on the guide steel pipe 22; as shown in fig. 4, the U-shaped rail wheel 414 is rotatably connected below the roller frame 412, and a connecting section 411 for connecting the U-shaped rail wheel 414 with the frame 4 is arranged above the roller frame 412; as shown in fig. 3, the frame 4 includes a longitudinal bar 42 and a cross bar 43, two ends of the longitudinal bar 42 are respectively connected with the connection section 411 and are arranged above the guide steel tube 22 in parallel, and the cross bar 43 is parallel to the cross bar 23 and is arranged above the two longitudinal bars 42 and is clamped at two sides of the connection section 411.

The roller frame 412 is , the U-shaped rail wheel 414 is rotatably connected with two side frames of the roller frame 412 through bolts and nuts, so that the U-shaped rail wheel 414 can rotate between the roller frames 412, besides the nuts and bolts, the U-shaped rail wheel 414 can also be rotatably connected with the roller frame 412 through a rotating shaft matched bearing, a connecting section 411 is further arranged above the roller frame 412, and the U-shaped rail wheel 414 is connected with the frame 4 through the connecting section 411; the structure of the combination of the U-shaped rail wheel 414, the roller frame 412 and the connecting section 411 is named as a pulley assembly 41, two pulley assemblies 41 positioned on the same guide steel pipe 22 can synchronously move by connecting two ends of the longitudinal rods 42 with the connecting section 411 of the two pulley assemblies 41 positioned on the same guide steel pipe 22 respectively, the transverse rods 43 are arranged between the two longitudinal rods 42 and clamped at two sides of the connecting section 411, the two pulley assemblies 41 positioned on different guide steel pipes 22 are connected by the transverse rods 43, the pulley assemblies 41 are simultaneously limited to shift along the longitudinal rods 42 and synchronously move, and four pulley assemblies 41 positioned on different guide steel pipes 22 are connected with the transverse rods 43 through the longitudinal rods 42 to form a mouth-shaped structure, so that the pulley assemblies 41 cannot fall down left and right and stand on the guide steel pipe 22, and the pulley assemblies 41 synchronously move under the driving of the power traction assembly 3; the connection mode between the longitudinal rod 42 and the transverse rod 43 and the connection section 411 can be connected through right-angle fasteners, and the right-angle fasteners are easy to obtain and convenient to detach after assembly at a construction site.

In order to facilitate the disassembly and connection of the steel pipe bracket 5 and the frame 4, increase the stability of the connection between the steel pipe bracket 5 and the frame 4, and realize the disassembly and assembly of the steel pipe bracket and the frame 4 without manual disassembly, the frame 4 further comprises a steel plate 44, as shown in fig. 3, wherein the steel plate 44 passes through the connecting section 411 and is arranged above the cross rod 43 to form a platform for placing the steel pipe bracket 5; as shown in fig. 1 or 2, the steel pipe bracket 5 is a frame formed by connecting and enclosing a plurality of vertical steel pipes 51, a plurality of longitudinal steel pipes 52 and a plurality of transverse steel pipes 53, and the upper end of the connecting section 411 is inserted into the lower end of the vertical steel pipe 51.

By arranging the steel plate 44 above the cross bar 43, the cross bar 43 is pressed to avoid instability of the cross bar 43 caused by excessive upper bearing, and meanwhile, an acting point is provided for the steel pipe bracket 5, and the steel plate 44 can be selected from a whole plate or two split plate structures as shown in fig. 3; the bottom of the steel pipe bracket 5 is a groined structure formed by detachably connecting two transverse steel pipes 53 and two longitudinal steel pipes 52 through right-angle fasteners, four vertical steel pipes 51 are arranged at four corners of the groined structure, and a frame structure with four open sides is formed to accommodate the disc buckle type steel pipes 6 to be transported; because the connecting section 411 passes through the steel plate 44, and a part of the connecting section is positioned above the steel plate 44, when the steel pipe bracket 5 and the frame 4 are required to be detachably connected, only the four vertical steel pipes 51 of the steel pipe bracket 5 are required to be aligned with the four connecting sections 411 of the frame 4 respectively, and the upper ends of the connecting sections 411 are inserted into the lower ends of the vertical steel pipes 51, at the moment, the four vertical steel pipes 51 of the steel pipe bracket 5 fall on the steel plate 44, and the steel plate 44 not only provides an acting point, but also enables the falling point of the steel pipe bracket 5 to be more stable and firm; when the tower crane is hoisted, the steel pipe bracket 5 and the disc buckle type steel pipe 6 loaded in the steel pipe bracket 5 can be directly transported away. The steel pipe bracket 5 and the frame 4 are connected with the connecting section 411 in an inserting way through the vertical steel pipe 51, so that the detachable connection between the steel pipe bracket 5 and the frame 4 can be realized without manual disassembly and assembly, time and labor are saved, meanwhile, the frame 4 and the steel pipe bracket 5 are formed by detachably connecting steel pipes through right-angle fasteners, the steel pipe bracket 5 and the frame 4 can be disassembled when the steel pipe bracket 5 and the frame 4 are not needed after transportation is finished, and the steel pipe bracket can be used as an ordinary steel pipe for lap joint, and the steel pipe bracket can be obtained and assembled on site for repeated use; in addition, the frame 4 and the steel pipe bracket 5 can be welded to form a more stable integrated structure.

In order to reduce construction cost and facilitate control of the transportation speed and the start-stop position of the transportation trolley, the power traction assembly 3 comprises a hand winch 31 arranged at one end of the transportation rail 2 in the main building 13, and the output end of the hand winch 31 is connected with the frame 4 through a steel wire rope 32; the hand winch 31 is utilized to manually control the transportation speed of the transportation trolley and the starting and stopping positions of the transportation trolley, so that the transportation trolley can be conveniently moved to a proper position for loading and unloading, and besides the manual control of the transportation trolley, a motor can be used to drive the hand winch 31.

In order to facilitate the pulling of the transport trolley loaded with coiled steel pipes into the main building 13, as shown in fig. 5, the power traction assembly 3 further comprises a fixed end 33, one end of the frame 4, which is close to the hand winch 31, is provided with a movable pulley 451 through a connecting frame 45, the steel wire rope 32 bypasses the movable pulley 451, one end of the steel wire rope is connected with the fixed end 33, and the other end of the steel wire rope is connected with the output end of the hand winch 31; by providing the movable pulley 451 on the frame 4, the purpose of labor-saving transportation is achieved.

The transportation rail 2, the frame 4 and the steel pipe bracket 5 can be assembled by steel pipes on a construction site, the materials are convenient to obtain, the cost is low, and if the stability is improved, the steel pipes can be welded in a connecting mode so as to form an integral structure; if for reduce cost and easy dismounting, the connected mode between steel pipe and the steel pipe can adopt to assemble, if utilize right angle fastener to connect, can dismantle it after this conveyer uses to end for other places, but reuse saves the cost.

Claims (6)

1. A steel pipe conveyer, characterized in that: the device comprises a power traction assembly (3), a transportation trolley and a transportation rail (2), wherein the transportation rail is arranged above an overhanging beam platform (11), and one end of the transportation rail extends to the upper part of a main building (13) at the inner side of the overhanging beam platform (11);

the transportation track (2) comprises two parallel guide steel pipes (22), one end of the transportation track (2) close to the main building (13) is higher than one end of the transportation track close to the cantilever beam platform (11), and the guide steel pipes (22) are supported and arranged above the cantilever beam platform (11) and the main building (13) through a plurality of supporting frames which are arranged at intervals along the guide steel pipes (22) and are formed by splicing the steel pipes;

the transport trolley comprises a frame (4) and a steel pipe bracket (5), wherein the frame (4) is in sliding connection with the guide steel pipe (22) through a U-shaped rail wheel (414), and the steel pipe bracket (5) is detachably connected with the frame (4);

the power traction assembly (3) is arranged at one end of the transportation rail (2) located in the main building and is connected with the frame (4) so as to drive the transportation trolley to move along the transportation rail (2).

2. A steel pipe transportation apparatus as claimed in claim 1, wherein: the support frame comprises two upright posts (21) and a cross brace (23) arranged between the two upright posts (21), wherein the cross brace (23) and the two upright posts (21) are mutually connected to form a -shaped structure, and the two guide steel pipes (22) are respectively arranged above the two ends of the cross brace (23) and are respectively connected with the upright posts (21) at the two ends through right-angle fasteners.

3. A steel pipe transportation apparatus as claimed in claim 1, wherein: the U-shaped track wheel (414) is rotatably connected below the roller frame (412), and a connecting section (411) for connecting the U-shaped track wheel (414) with the frame (4) is arranged above the roller frame (412);

the frame (4) comprises a longitudinal rod (42) and transverse rods (43), two ends of the longitudinal rod (42) are respectively connected with the connecting section (411) and are arranged above the guide steel pipes (22) in parallel, and the transverse rods (43) are arranged above the two longitudinal rods (42) and are clamped on two sides of the connecting section (411).

4. A steel pipe transportation apparatus as claimed in claim 3 wherein: the frame also comprises a steel plate (44), the steel plate (44) penetrates through the connecting section (411) to be arranged above the cross rod (43) to form a platform for placing the steel pipe bracket (5), the steel pipe bracket (5) is a frame-shaped frame formed by connecting and enclosing a plurality of vertical steel pipes (51), a plurality of longitudinal steel pipes (52) and a plurality of transverse steel pipes (53), and the upper end of the connecting section (411) is inserted into the lower end of the vertical steel pipes (51).

5. A steel pipe transportation apparatus as claimed in claim 1, wherein: the power traction assembly (3) comprises a hand winch (31) arranged at one end of the transportation track (2) located in the main building (13), and the output end of the hand winch (31) is connected with the frame (4) through a steel wire rope (32).

6. A steel pipe transportation apparatus as claimed in claim 5 wherein: the power traction assembly (3) further comprises a fixed end (33), one end of the frame (4) close to the hand winch (31) is provided with a movable pulley (451) through a connecting frame (45), the movable pulley (451) is wound by the steel wire rope (32), one end of the steel wire rope is connected with the fixed end (33), and the other end of the steel wire rope is connected with the output end of the hand winch (31).