Semi-automatic lifting appliance equipment for narrow space

Abstract

Semi-automatic lifting appliance equipment used in a narrow space comprises a cross beam, a lifting lug is welded to the middle of the upper end of the cross beam, pull rope pulley blocks are installed on the two sides of the upper end of the cross beam, longitudinal beams are welded to the two sides of the lower end of the cross beam, hook blocks are arranged below the two longitudinal beams in a shaft hole rotating mode, and balancing weights are installed at the two ends of the cross beam. A pull rope is arranged between the balancing weight and the hook block and is connected to the pull rope pulley block in a sliding mode. The lifting appliance has the beneficial effects that the lifting safety is improved, the lifting work risk in a narrow space is reduced, the manufacturing cost and the later maintenance cost are reduced, and meanwhile, the lifting appliance not only can be used for lifting work in the narrow space, but also can be widely applied to non-power supply areas outside workshops and field lifting work, so that the lifting appliance is suitable for large-scale popularization and application. Compared with other types of lifting appliances used for pipeline lifting, the lifting appliance has the advantages that the lifting hooks on two sides do not need to be manually pulled open, the labor intensity of workers can be reduced, the cost is saved, and the lifting efficiency is improved.

Description

Technical Field

[0001] This utility model relates to a lifting device, specifically a semi-automatic lifting device for use in confined spaces. Background Technology

[0002] Currently, magnetic jacks are generally used for lifting pipes in confined spaces. However, due to structural limitations, magnetic jacks are prone to pipe falls during operation if the hook angle or fit is faulty. This not only poses a safety risk to the operator but also places other personnel and equipment along the pipe lifting route in a high-risk area. A slight mishap could lead to a major safety accident, affecting the pipe lifting operation and causing considerable inconvenience. Therefore, there is an urgent need for a semi-automatic lifting device for confined spaces. Utility Model Content

[0003] The purpose of this utility model is to address the shortcomings and defects of existing technologies by providing a semi-automatic lifting device for confined spaces. This lifting device not only increases lifting safety and reduces the risk of lifting operations in confined spaces, but also reduces manufacturing and maintenance costs. Furthermore, this lifting device can be used not only for lifting operations in confined spaces, but also for lifting operations in areas without power supply outside factories and in the field. Compared with other types of lifting devices used for pipeline lifting, it eliminates the need for manual opening of the hooks on both sides, reducing labor intensity, saving costs, and improving lifting efficiency.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a semi-automatic lifting device for narrow spaces, comprising a crossbeam, a lifting lug welded to the middle of the upper end of the crossbeam, a pull rope pulley assembly installed on both sides of the upper end of the crossbeam, and longitudinal beams welded to both sides of the lower end of the crossbeam, with hook blocks rotatably mounted in the lower part of the two longitudinal beams, counterweights installed at both ends of the crossbeam, and a pull rope provided between the counterweights and the hook blocks, the pull rope being slidably connected to the pull rope pulley assembly.

[0005] Furthermore, a vertical limiting block is welded to the upper part of the outer side of the longitudinal beam, and a horizontal limiting block is welded to the lower part of the inner side of the longitudinal beam.

[0006] Furthermore, the counterweight is equipped with a locking pin, and one end of the locking pin abuts against the crossbeam.

[0007] Furthermore, all four corners of the hook block are rounded.

[0008] Furthermore, the counterweight has a shaft mounting hole for mounting the shaft, a rope mounting hole for connecting the rope, and a pin through hole for inserting the pin. The shaft mounting hole is located at the top of one side of the counterweight, and the rope mounting hole is located above the shaft mounting hole.

[0009] Furthermore, both the counterweight and the hook block can rotate around their own rotation axis.

[0010] After adopting the above technical solution, the beneficial effects of this utility model are as follows: This lifting device has at least the following advantages:

[0011] 1. Increase hoisting safety and reduce the risks of hoisting operations in confined spaces;

[0012] 2. Reduced energy consumption during later lifting operations: Magnetic hoists not only consume electricity, but also may incur maintenance costs such as wire damage and electromagnetic unit failure during later operation; This lifting device uses a rigid mechanical structure, and apart from wear and tear on the shaft or rope, there are no high-cost parts, resulting in relatively low later operation and maintenance costs;

[0013] 3. Wide applicability of the lifting equipment: Due to its mechanical structure, it does not require power support. It can be used not only for lifting operations in narrow spaces, but also for lifting operations in areas without power supply outside factories and in the field. Compared with other types of lifting equipment used for pipeline lifting, it does not require manual opening of the hooks on both sides, which can reduce the labor intensity of workers, save costs, and improve lifting efficiency. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model 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 utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the structure of this utility model.

[0016] Figure 2 This is a schematic diagram of the counterweight block in this utility model.

[0017] Figure 3 This is a schematic diagram of the longitudinal beam in this utility model.

[0018] Figure 4 This is a schematic diagram of the working state of this utility model. Figure 1 .

[0019] Figure 5 This is a schematic diagram of the working state of this utility model. Figure 2 .

[0020] Figure 6 This is a schematic diagram of the working state of this utility model. Figure 3 .

[0021] Figure 7 This is a schematic diagram of the working state of this utility model. Figure 4 .

[0022] Figure 8 This is a schematic diagram of the working state of this utility model. Figure 5 .

[0023] Explanation of reference numerals in the attached drawings: 1. Crossbeam; 2. Lifting lug; 3. Locking pin; 4. Counterweight block; 5. Pull rope pulley block; 6. Pull rope; 7. Longitudinal beam; 8. Hook block; 71. Vertical limit block; 72. Horizontal limit block; 401. Shaft mounting hole; 402. Pull rope mounting hole; 403. Locking pin through hole. Detailed Implementation

[0024] See Figures 1-3 As shown, the technical solution adopted in this specific embodiment is as follows: It includes a crossbeam 1, a lifting lug 2 welded to the middle of the upper end of the crossbeam 1, a pull rope pulley group 5 installed on both sides of the upper end of the crossbeam 1, and longitudinal beams 7 welded to both sides of the lower end of the crossbeam 1. A hook block 8 is rotatably mounted on the lower part of the two longitudinal beams 7, a counterweight block 4 is installed at both ends of the crossbeam 1, and a pull rope 6 is provided between the counterweight block 4 and the hook block 8, and the pull rope 6 is slidably connected to the pull rope pulley group 5.

[0025] More specifically, a vertical limiting block 71 is welded to the upper outer side of the longitudinal beam 7, and a horizontal limiting block 72 is welded to the lower inner side of the longitudinal beam 7. Through the limiting operation of the vertical limiting block 71 and the horizontal limiting block 72, the rotation angle of the hook block 8 can be restricted, so that the hook block 8 can better lift the pipe.

[0026] More specifically, the counterweight 4 is equipped with a locking pin 3, and one end of the locking pin 3 abuts against the crossbeam 1. The locking pin 3 can restrict the counterweight 4 from rotating downward due to gravity, so that the counterweight 4 is relatively fixed on the crossbeam 1 under the action of gravity, thereby breaking the transmission path of the pull rope 6 and allowing the hook block 8 to be in a free rotation state.

[0027] More specifically, all four corners of the hook block 8 are rounded. This rounded corner design prevents the hook block 8 from rubbing against the pipe.

[0028] More specifically, the counterweight 4 has a shaft mounting hole 401 for mounting the shaft, a rope mounting hole 402 for connecting the pull rope 6, and a locking pin through hole 403 for inserting the locking pin 3. The shaft mounting hole 401 is located at the top of one side of the counterweight 4, and the rope mounting hole 402 is located above the shaft mounting hole 401. The shaft mounting hole 401 facilitates the installation of the counterweight 4 on the crossbeam 1 and gives the counterweight 4 a certain degree of eccentricity.

[0029] More specifically, both the counterweight 4 and the hook block 8 can rotate around their own rotation axis.

[0030] The working principle of this utility model is as follows: (See attached diagram) Figures 4-7 As shown, when the lifting device is unloaded and needs to hook a pipe, the operator can insert the locking pin 3 into the counterweight block 4. The locking pin 3 can restrict the counterweight block 4 from rotating downwards due to gravity, so that the counterweight block 4 is relatively fixed on the crossbeam 1 under the action of gravity. The rope 6 is then loosened, allowing the hook block 8 to rotate freely. Since the hook block 8 is restricted by the horizontal limiting block 72, the hook block 8 can still maintain a horizontal state by gravity. When it touches the outer wall of the pipe to be lifted, it is pushed up by the pipe wall, and the hook block 8 rotates around the pivot. The lifting device continues to move downwards, and the hook block 8 gradually slides over the pipe wall and enters the internal space. After the hook block 8 enters the internal space of the pipe, the hook block 8 rotates downwards around the pivot under the action of gravity and is blocked again by the horizontal limiting block 7, returning to a horizontal state. At this time, the operator can use a crane or other lifting equipment to lift the lifting lug 2 upwards. The lifting lug 2 drives the entire lifting device to rise, and the pipe to be lifted is hooked by the hook block 8, thus realizing the fully automatic hooking and hanging operation. When the lifting device is loaded and moving downwards to place the pipe, the worker can pull out the locking pin 3, connecting the transmission path between the counterweight block 4 and the hook block 8. With the pipe suspended, the hook block 8 is driven by the pipe's weight, remaining horizontal. The hook block 8 generates tension through the pull rope 6 and pull rope pulley block 5, causing the counterweight block 4 to tilt upwards. When the pipe contacts the ground or other supports, its weight gradually disappears. As the lifting device moves downwards, the hook block 8 leaves the inner surface of the pipe. Because the weight of the counterweight block 4 is greater than that of the hook block 8, the counterweight block 4 rotates downwards around its axis of rotation, pulling the hook block 8 upwards through the pull rope 6. The hook block 8 rotates upwards around its axis of rotation and is eventually stopped by the vertical limit block 71. At this point, the hook block 8 is entirely within the longitudinal beam 3, and the entire lifting device is lifted, completing the pipe lowering operation. For details, please refer to [link to documentation]. Figure 8 As shown.

[0031] The above is only used to illustrate the technical solution of this utility model and not to limit it. Any other modifications or equivalent substitutions made by those skilled in the art to the technical solution of this utility model, as long as they do not depart from the spirit and scope of the technical solution of this utility model, should be covered within the scope of the claims of this utility model.

Claims

1. A semi-automatic lifting device for use in confined spaces, characterized in that: It includes a crossbeam (1), with a lifting lug (2) welded to the middle of the upper end of the crossbeam (1), and a pull rope pulley assembly (5) installed on both sides of the upper end of the crossbeam (1). A longitudinal beam (7) is welded to both sides of the lower end of the crossbeam (1). A hook block (8) is rotatably mounted on the lower part of the two longitudinal beams (7). A counterweight block (4) is installed at both ends of the crossbeam (1), and a pull rope (6) is provided between the counterweight block (4) and the hook block (8). The pull rope (6) is slidably connected to the pull rope pulley assembly (5).

2. The semi-automatic lifting device for confined spaces according to claim 1, characterized in that: A vertical limiting block (71) is welded above the outer side of the longitudinal beam (7), and a horizontal limiting block (72) is welded below the inner side of the longitudinal beam (7).

3. The semi-automatic lifting device for confined spaces according to claim 1, characterized in that: The counterweight (4) is equipped with a locking pin (3), and one end of the locking pin (3) abuts against the crossbeam (1).

4. The semi-automatic lifting device for confined spaces according to claim 1, characterized in that: The four corners of the hook block (8) are all rounded.

5. A semi-automatic lifting device for confined spaces according to claim 1, characterized in that: The counterweight (4) has a shaft mounting hole (401) for mounting the shaft, a rope mounting hole (402) for connecting the rope (6), and a pin through hole (403) for inserting the pin (3). The shaft mounting hole (401) is located at the top of one side of the counterweight (4), and the rope mounting hole (402) is located above the shaft mounting hole (401).

6. A semi-automatic lifting device for use in confined spaces according to claim 1, characterized in that: Both the counterweight (4) and the hook block (8) can rotate around their own rotation axis.

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