A lifting device for vertically lifting and hoisting a tubular workpiece

Abstract

The utility model discloses a hoist of vertical hoisting and transfer of tubular workpiece, because the top plate and bottom plate middle part all set up the perforation, the inside of perforation is set up and draws the pull rod, and the pull rod axial movable setting is in the perforation, and a plurality of support rods are articulated on the pull rod side, and the other end of support rod is articulated with the side rod, after the connecting portion of pull rod upper end connects the lifting rope of crane, the top plate, bottom plate, side rod, upper movable connecting piece, lower movable connecting piece have the trend of downward to pull rod under the gravity effect, after this hoist is put into the tubular workpiece, a plurality of side rods contact with the inner wall of tubular workpiece, and the side rod will be pushed through the support rod when lifting the pull rod, make a plurality of side rods top tightly tubular workpiece simultaneously, and the locking mechanism can prevent the top plate, bottom plate and pull rod from moving towards each other but not affect moving away from each other, make the side rod continuously top tightly tubular workpiece, are not affected by hoisting process shaking, lifting interference, only the locking of locking mechanism to the top plate, bottom plate and pull rod is released, and the top plate, bottom plate and pull rod can move towards each other.

Description

Technical Field

[0001] This utility model belongs to the field of lifting tools, and in particular relates to a lifting tool for vertically lifting and transferring tubular workpieces. Background Technology

[0002] During the manufacturing process of pressure vessels, equipment nozzles require multiple lifting and transfers. For smaller nozzles, slings or clamps can be used for lifting, while larger and heavier nozzles can be lifted using pre-welded lifting lugs. However, these lifting methods have limitations in practice. Slings are difficult to use for securing or tightening, and the binding method restricts the installation of workpieces with the equipment. Lifting lugs need to be welded to the workpiece before lifting, and if they interfere with subsequent processing after lifting, they must be removed. Both welding and gas cutting can damage the workpiece during this process. Utility Model Content

[0003] (1) Technical problem to be solved: Provide a lifting device for vertical lifting and transfer of tubular workpieces.

[0004] (2) The technical solution adopted by this utility model is as follows: A lifting device for vertically lifting and transferring tubular workpieces includes a top plate, a bottom plate, and side rods. The top plate and bottom plate are concentrically arranged, and multiple side rods are evenly distributed circumferentially. The upper part of the side rods is connected to the top plate via an upper movable connector, and the lower part of the side rods is connected to the bottom plate via a lower movable connector. A through hole is opened in the middle of both the top plate and the bottom plate, and a tie rod is inserted through the through hole. The tie rod is axially movable within the through hole. A support rod is hinged to the side of the tie rod. The number of support rods matches the number of side rods. The other end of the support rod is hinged to the side rod. A connecting part is provided at the upper end of the tie rod. A locking mechanism is provided on the top plate at the edge of the central hole.

[0005] A further technical solution is that the locking mechanism includes a base, a spring, and a locking block. The base has a sliding hole, the locking block is slidably disposed inside the sliding hole, the spring is disposed inside the sliding hole, one end of the spring contacts the side wall of the sliding hole, and the other end of the spring contacts the locking block. The end of the locking block facing the pull rod is provided with a one-way positioning tooth, and the pull rod is provided with a one-way slot that matches the one-way positioning tooth.

[0006] A further technical solution is that the upper movable connector includes an upper guide rod connected to the upper part of the side rod, and upper guide grooves are evenly distributed on the top plate. The upper guide rod is disposed inside the upper guide groove and slidably connected thereto. The lower movable connector includes a lower guide rod connected to the side rod, and lower guide grooves are evenly distributed on the bottom plate. The lower guide rod is disposed inside the lower guide groove and slidably connected thereto.

[0007] (3) Due to the adoption of the above technical solution, the beneficial effects of this utility model are as follows: Since the top plate and the bottom plate are both opened with through holes, the tie rod is installed inside the through holes, and the tie rod is axially movable in the through holes. Multiple support rods are hinged to the side of the tie rod, and the other end of the support rod is hinged to the side rod. After the upper end of the tie rod is connected to the hoisting rope of the crane, the top plate, bottom plate, side rod, upper movable connecting piece, and lower movable connecting piece tend to move downward relative to the tie rod under the action of gravity. After the tubular workpiece is placed in this lifting device, multiple side rods contact the inner wall of the tubular workpiece. When the tie rod is lifted, the side rods will be pushed through the support rods, so that multiple side rods simultaneously press against the tubular workpiece. At the same time, the locking mechanism can prevent the top plate, bottom plate and tie rod from moving towards each other but does not affect the opposite movement, so that the side rods continuously press against the tubular workpiece and are not affected by the shaking and lifting during the hoisting process. Only when the locking mechanism is released from locking the top plate, bottom plate and tie rod can the top plate, bottom plate and tie rod move towards each other.

[0008] This lifting tool does not weld to the workpiece, does not damage the workpiece surface, and can be reused. This lifting tool can achieve vertical lifting of tubular workpieces. In the actual application of pressure vessels, it can be used for the assembly of nozzles and shells. During installation, adjust the height of the lifting tool in the tubular workpiece. This lifting device has a stable support structure, and by replacing the support rods and guide rods of different lengths, it can be further adapted to the lifting of various sizes of tubular workpieces. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a cross-sectional view of the locking mechanism described in this utility model along its length. Figure 3 This is a cross-sectional view of the locking mechanism described in this utility model in the width direction; Figure 4 This is a schematic diagram of the present invention placed inside a tubular workpiece. Detailed Implementation

[0010] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments.

[0011] like Figures 1-4As shown. A lifting device for vertically lifting and transferring tubular workpieces includes a top plate 3, a bottom plate 4, and side rods 1. The top plate 3 and the bottom plate 4 are concentrically arranged, and multiple side rods 1 are evenly distributed circumferentially. The upper part of the side rods 1 is connected to the top plate 3 through an upper movable connector, and the lower part of the side rods 1 is connected to the bottom plate 4 through a lower movable connector. Both the top plate 3 and the bottom plate 4 have through holes in the middle, and a pull rod 2 is inserted through the through hole. The pull rod 2 is axially movable in the through hole. A support rod 5 is hinged to the side of the pull rod 2. The number of support rods 5 matches the number of side rods 1. The other end of the support rod 5 is hinged to the side rod 1. A connecting part is provided at the upper end of the pull rod 2. A locking mechanism 7 is provided on the top plate 3 at the edge of the central hole. The locking mechanism 7 includes a base 7-1, a spring 7-2, and a locking block 7-3. The base 7-1 has a sliding hole 7-4. The locking block 7-3 is slidably disposed inside the sliding hole 7-4. The spring 7-2 is disposed inside the sliding hole 7-4, with one end of the spring 7-2 contacting the side wall of the sliding hole 7-4 and the other end of the spring 7-2 contacting the locking block 7-3. The end of the locking block 7-3 facing the pull rod 2 is provided with a one-way positioning tooth 7-6. The pull rod 2 is provided with a one-way groove 7-7 that matches the one-way positioning tooth 7-6.

[0012] The upper movable connector includes an upper guide rod 6 connected to the upper part of the side rod 1. Upper guide grooves 9 are evenly distributed on the top plate 3, and the upper guide rod 6 is disposed inside and slidably connected to the upper guide grooves 9. The lower movable connector includes a lower guide rod 10 connected to the side rod 1, and lower guide grooves 11 are evenly distributed on the bottom plate 4. The lower guide rod 10 is disposed inside and slidably connected to the lower guide grooves 11. The connecting part is a hook 8, which is welded to the pull rod 2. The support rod 5 is rotatably connected to the pull rod 2 or the side rod 1 via a pin.

[0013] In use, connect the upper end of the lifting rod 2 to the connecting part (hook 8) of the lifting device, and place the lifting device inside the tubular workpiece (connector). Adjust the height of the lifting device, temporarily fix the top plate 3 manually, and lift the lifting rod 2 with the hook. Since the locking mechanism 7 can prevent the top plate 3, bottom plate 4 and the lifting rod 2 from moving towards each other, it does not affect the movement of the top plate 3, bottom plate 4 and the lifting rod 2 in opposite directions (however, when the top plate 3, bottom plate 4 and the lifting rod 2 move in opposite directions, they are damped by the spring 7-2. Of course, at this time, the locking mechanism 7 can also be released: let the one-way positioning tooth 7-6 disengage from the one-way slot 7-7 so that it is not damped by the spring 7-2). Slowly pull up with the hook, the support rod 5 drives the side rod 1 to unfold, and after the side rod 1 is in close contact with the inner wall of the workpiece, it is lifted (at this time, no need to lift). (Manual intervention) Because the tie rod 2 is subjected to an upward pulling force, the top plate 3, bottom plate 4, and tie rod 2 can move in opposite directions. After the side rod 1 is pressed against the inner wall of the workpiece, this pressing action is continuous. Multiple side rods 1 work together to support the workpiece. The locking mechanism 7 prevents the top plate 3, bottom plate 4, and tie rod 2 from moving towards each other. It is not affected by external factors such as shaking or lifting during the hoisting process, and can achieve a stable connection between the lifting device and the tubular workpiece. After the connecting pipe and the shell are assembled, manual intervention is used to release the locking action of the locking mechanism 7, and the lifting rod is moved downward. The side rod 1 will retract and separate from the inner wall of the workpiece. The lifting device can be removed. Only by releasing the locking mechanism 7 from the top plate 3, bottom plate 4, and tie rod 2 can the top plate 3, bottom plate 4, and tie rod 2 move towards each other. The device is equipped with a locking mechanism that can automatically lock after hoisting to prevent the workpiece from loosening and falling off during the transfer process.

[0014] In the locking mechanism 7, an operating rod 7-8 is provided on the top of the locking block 7-3, and a reserved slot 7-5 is provided on the top of the base 7-1. The operating rod 7-8 extends out of the reserved slot 7-5. When the locking mechanism 7 is released, the locking block 7-3 is pulled by the operating rod 7-8, the spring 7-2 is compressed, and the one-way positioning tooth 7-6 disengages from the one-way slot 7-7. The top plate 3, the bottom plate 4, and the pull rod 2 can move in opposite directions or towards each other. When the locking mechanism 7 is not released, since the top wall of the one-way slot 7-7 is horizontal and the bottom wall is inclined, and the top surface of the one-way positioning tooth 7-6 is horizontal and the bottom surface is inclined, the pull rod 2 can move upward relative to the one-way positioning tooth 7-6. However, when moving upward, the spring 7-2 is repeatedly compressed. Therefore, when the top plate 3, the bottom plate 4, and the pull rod 2 move in opposite directions, they are damped by the spring 7-2. The base 7-1 and the top plate 3 are fixed by welding or bolts. Two locking mechanisms 7 can be provided.

[0015] In the upper movable connector, the side rod 1 and the upper guide rod 6 are fixed by welding. There are two upper guide rods 6 corresponding to each side rod 1, one above the other. There are also two upper guide grooves 9 corresponding to each upper guide rod 6, which are respectively set at the upper and lower parts of the top plate 3. Similarly, in the lower movable connector, the side rod 1 and the lower guide rod 10 are fixed by welding. There are two lower guide rods 10 corresponding to each side rod 1, one above the other. There are also two lower guide grooves 11 corresponding to each lower guide rod 10, which are respectively set at the upper and lower parts of the bottom plate 4. In this way, the movable connection between the side rod 1 and the top plate 3 and the bottom plate 4 has good reliability and stability.

[0016] The above are merely preferred embodiments of this utility model.

Claims

1. A lifting device for vertical lifting and handling of tubular workpieces, characterized in that It includes a top plate (3), a bottom plate (4) and side rods (1). The top plate (3) and the bottom plate (4) are concentrically arranged. Multiple side rods (1) are evenly distributed around the circumference. The upper part of the side rod (1) is connected to the top plate (3) through an upper movable connector. The lower part of the side rod (1) is connected to the bottom plate (4) through a lower movable connector. The top plate (3) and the bottom plate (4) both have through holes in the middle. A pull rod (2) is inserted through the through hole and is axially movable in the through hole. A support rod (5) is hinged to the side of the pull rod (2). The number of support rods (5) matches the number of side rods (1). The other end of the support rod (5) is hinged to the side rod (1). A connecting part is provided at the upper end of the pull rod (2). A locking mechanism (7) is provided on the top plate (3) at the edge of the central hole.

2. The lifting device for vertical lifting and transporting of tubular workpieces according to claim 1, characterized in that The locking mechanism (7) includes a base (7-1), a spring (7-2), and a locking block (7-3). The base (7-1) has a sliding hole (7-4). The locking block (7-3) is slidably disposed inside the sliding hole (7-4). The spring (7-2) is disposed inside the sliding hole (7-4), and one end of the spring (7-2) contacts the side wall of the sliding hole (7-4), while the other end of the spring (7-2) contacts the locking block (7-3). The end of the locking block (7-3) facing the pull rod (2) is provided with a one-way positioning tooth (7-6). The pull rod (2) is provided with a one-way slot (7-7) that matches the one-way positioning tooth (7-6).

3. The lifting device according to claim 1 or 2, wherein The upper movable connector includes an upper guide rod (6) connected to the upper part of the side rod (1), and upper guide grooves (9) are evenly distributed on the top plate (3). The upper guide rod (6) is located inside the upper guide groove (9) and is slidably connected to it. The lower movable connector includes a lower guide rod (10) connected to the side rod (1), and lower guide grooves (11) are evenly distributed on the bottom plate (4). The lower guide rod (10) is located inside the lower guide groove (11) and is slidably connected to it.

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