A hoisting apparatus for seamless steel pipes

Abstract

This invention belongs to the field of steel pipe hoisting technology, specifically relating to a hoisting device for seamless steel pipes. It includes a hoisting block and a crossbeam mounted on the hoisting block; it also includes an extension assembly; the extension assembly is connected to the crossbeam; a connecting block is connected to each end of the crossbeam; each connecting block has a limiting groove; each connecting block is equipped with an electric winch; each electric winch has several equally spaced steel cables wound around it, each cable passing through a corresponding limiting groove; and a lifting device is fixed to the end of each steel cable. This invention achieves batch transport of seamless steel pipes by bringing multiple lifting devices together and pulling them to the middle or lower level of the seamless steel pipes. The hooks then secure the parallel seamless steel pipes, and the square rod is rotated to both sides of the seamless steel pipes to be transported, connecting the steel cables to the brought-together lifting devices. This limits the movement of the seamless steel pipes on both sides, preventing them from rolling or falling off, thus improving the transport efficiency of seamless steel pipes.

Description

Technical Field

[0001] This invention belongs to the field of steel pipe hoisting technology, specifically relating to a hoisting device for seamless steel pipes. Background Technology

[0002] In the current production and storage of seamless steel pipes, finished steel pipes are usually stored in batches by stacking.

[0003] During subsequent transfer or loading operations, cranes and other lifting equipment are generally relied upon for handling. However, existing traditional transfer methods have obvious limitations: because the steel pipes are tightly stacked, operators can only lift them one by one from the top layer of the stack, making it impossible to directly and efficiently extract the middle and lower layers of steel pipes. This not only limits the number of pipes that can be lifted at one time and reduces work efficiency, but also makes it easy for relative slippage, center of gravity shift, and violent shaking to occur during the lifting process due to the lack of effective fixation between the steel pipes. Especially when lifting multiple loose pipes, the risk of collision, swinging, and even slippage between the steel pipes increases significantly, which may not only cause damage to the product surface but also pose serious safety hazards, threatening the safety of on-site personnel and equipment. Summary of the Invention

[0004] To overcome the shortcomings of traditional methods for transporting seamless steel pipes, such as the limited number of seamless steel pipes that can be transported at one time and the tendency for the center of gravity to shift and sway during hoisting, this invention provides a hoisting device for seamless steel pipes.

[0005] The present invention achieves its objective by providing a lifting device for seamless steel pipes, comprising a lifting block and a crossbeam mounted on the lifting block; it also includes an extension assembly; the extension assembly is connected to the crossbeam; a connecting block is connected to each end of the crossbeam; each connecting block has a limiting groove; each connecting block is equipped with an electric winch; each electric winch is wound with a plurality of equally spaced steel cables, each steel cable passing through a corresponding limiting groove; each end of each steel cable is fixedly connected to a lifting device; each lifting device has a groove; each groove is rotatably connected to a hook via a torsion spring, and all hooks face the crossbeam; a positioning post is provided on one side of each lifting device; a hook groove is provided on the other side of each lifting device, and each positioning post can slide within the hook groove of an adjacent lifting device; the extension assembly is used to move two connecting blocks to both sides.

[0006] To facilitate clamping seamless steel pipes of different lengths, it is more preferable that the extension assembly includes winches; two winches are installed on the crossbeam, located on both sides of the lifting block; each winch is wound with a steel cable II, and both ends of the steel cable II are connected to the connecting block; two slide rods are slidably connected to each end of the crossbeam, and the slide rods on the same side are fixedly connected to the connecting block; a hydraulic push rod is installed on the left and right sides of the crossbeam, and the telescopic parts of the two hydraulic push rods are fixedly connected to a connecting block.

[0007] More preferably, the hook consists of a main hook and a limiting block, with the limiting block rotatably connected to the main hook via a torsion spring.

[0008] To further restrain the seamless steel pipe being hoisted, it is preferable to include square rods; each connecting block has a square rod rotatably connected to both sides via a torsion spring; each square rod has a cavity; each cavity has a rotating rod rotatably connected to it; each rotating rod has a contact post, and several inserts arranged in a star-shaped pattern along the circumference are fixed to the contact post, and the rotating rod has slots corresponding to the inserts; each rotating rod has a steel cable three wound around it, and the end of the steel cable three passes through the cavity and is located outside the square rod; two steel cables three located on the same side, one of which has a positioning post two at its end, and the other has a limit sleeve at its end, and the positioning post two and the hook groove of the lifting device are located on the same side.

[0009] More preferably, each main hook is provided with a layer of silicone coating.

[0010] The above settings achieve the effect of protecting the inner wall of the seamless steel pipe.

[0011] More preferably, each limiting block is provided with several V-shaped grooves that are evenly distributed.

[0012] The above settings achieve the effect of increasing the friction of the limiting block.

[0013] More preferably, an electromagnet is installed in the lower middle part of the crossbeam.

[0014] The above settings improve the stability of the hoisting process.

[0015] To further protect the seamless steel pipe, it is preferable to include an electric winder; each connecting block is equipped with an electric winder located outside the electric winch; each electric winder winds up a protective net; and each lifting device has a hanging slot.

[0016] More preferably, the protective netting is made of metal.

[0017] More preferably, it also includes rubber blocks; a rubber block is provided on the underside of each connecting block.

[0018] Compared with the prior art, the present invention has the following advantages: The seamless steel pipe hoisting equipment obtained by the present invention, through the above design, brings together multiple lifting devices and pulls them to the seamless steel pipes in the middle and lower layers, so that the hooks can hold the seamless steel pipes side by side, and then rotates the square bar to both sides of the seamless steel pipes to be transported, so that the steel cable connects with the brought together lifting devices, thereby limiting the two sides of the seamless steel pipes to be transported and preventing them from rolling or falling off, thus realizing the batch transport of seamless steel pipes and improving the transport efficiency of seamless steel pipes.

[0019] The seamless steel pipe hoisting equipment obtained by the present invention through the above design allows the distance between the two connecting blocks to be adjusted by the telescopic part of the hydraulic push rod, which facilitates the operator to hoist seamless steel pipes of different lengths. Furthermore, during the clamping of the seamless steel pipe, the limiting block is rotatably connected to the main hook through a torsion spring, which can adapt to clamping seamless steel pipes of different thicknesses.

[0020] The seamless steel pipe hoisting equipment designed in this invention restricts the two ends of the seamless steel pipe to be hoisted by unfolding a metal protective net, preventing the seamless steel pipe from slipping from both ends during transportation and threatening the safety of on-site personnel and equipment, thus improving the practicality of the equipment. In addition, the metal protective net can also play a certain role in bearing weight during transportation, sharing the pressure of the steel cable. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural diagram of the hoisting equipment for seamless steel pipes of the present invention; Figure 2 This is a three-dimensional structural diagram of the connecting block, electric winch, steel cable, lifting tool, electric winding device, and protective net of the seamless steel pipe hoisting equipment of the present invention; Figure 3 This is a three-dimensional structural diagram of the lifting device and hook for the seamless steel pipe hoisting equipment of the present invention; Figure 4 This is a three-dimensional structural diagram of the hook of the hoisting equipment for seamless steel pipes according to the present invention; Figure 5 This is a schematic diagram of the crossbeam, connecting block, sliding rod, and rubber block structure of the seamless steel pipe hoisting equipment of the present invention. Figure 6 This is a three-dimensional structural diagram of the square rod, rotating rod, and steel cable of the seamless steel pipe hoisting equipment of the present invention; Figure 7 This is a diagram showing the working state of the hoisting equipment for seamless steel pipes according to the present invention.

[0022] In the diagram: 1. Lifting block, 2. Crossbeam, 3. Winch, 4. Steel cable 2, 5. Connecting block, 6. Electric winch, 7. Steel cable 1, 8. Lifting device, 9. Hook, 101. Sliding rod, 102. Hydraulic push rod, 103. Square rod, 104. Rotating rod, 105. Steel cable 3, 201. Electric winder, 202. Protective net, 203. Rubber block, 91. Main hook, 92. Limiting block, 2001. Electromagnet, 5001. Limiting groove, 8001. Groove, 8002. Positioning post 1, 8003. Hook groove, 8004. Hanging groove, 9201. V-groove, 10301. Cavity, 10401. Contact post, 10501. Positioning post 2, 10502. Limiting sleeve. Detailed Implementation

[0023] The specific embodiments of the present invention are described in detail below with reference to the accompanying drawings. However, the description of the embodiments is not intended to limit the technical solutions, and any formal but not substantive changes made based on the inventive concept should be considered within the scope of protection of the present invention. Those skilled in the art will recognize that terms such as "above," "below," "upward," and "downward" are used to describe the drawings and not to indicate a limitation on the scope of the invention as defined by the appended claims. Any numerical designations such as "first" or "second" are merely illustrative and not intended to limit the scope of the invention in any way.

[0024] Example 1: This invention relates to a hoisting device for seamless steel pipes, such as... Figures 1-7 As shown, it includes a lifting block 1 and a crossbeam 2; the crossbeam 2 is welded to the lower side of the lifting block 1; It also includes an extension assembly, a connecting block 5, an electric winch 6, steel cables 7, lifting devices 8, and hooks 9; the extension assembly is connected to the crossbeam 2; a connecting block 5 is connected to each end of the crossbeam 2; each connecting block 5 has a limiting groove 5001; each connecting block 5 is equipped with an electric winch 6; each electric winch 6 is wound with six steel cables 7 distributed at equal intervals, and each steel cable 7 passes through the corresponding limiting groove 5001; each end of each steel cable 7 is fixedly connected to a lifting device 8; each lifting device 8 has a groove 8001; each groove 8001 is rotatably connected to a hook 9 by a torsion spring, and all hooks 9 face the crossbeam 2; a positioning post 8002 is provided on one side of each lifting device 8; a hook groove 8003 is provided on the other side of each lifting device 8, and each positioning post 8002 can slide in the hook groove 8003 on the adjacent lifting device 8.

[0025] The extension assembly includes a winch 3, a steel cable 4, a slide bar 101, and a hydraulic push rod 102; two winches 3 are installed on the crossbeam 2, and the two winches 3 are located on both sides of the lifting block 1; each winch 3 is wound with a steel cable 4, and the two ends of the steel cable 4 are connected to the connecting block 5; two slide bars 101 are slidably connected to each end of the crossbeam 2, and the slide bars 101 on the same side are fixedly connected to the connecting block 5; a hydraulic push rod 102 is installed on the left and right sides of the crossbeam 2, and the telescopic part of each of the two hydraulic push rods 102 is fixedly connected to a connecting block 5.

[0026] The hook 9 consists of a main hook 91 and a limiting block 92, with the limiting block 92 rotatably connected to the main hook 91 via a torsion spring.

[0027] It also includes a square rod 103, a rotating rod 104, and a steel cable 105; each side of each connecting block 5 is rotatably connected to a square rod 103 via a torsion spring; each square rod 103 has a cavity 10301; each cavity 10301 is rotatably connected to a rotating rod 104; each rotating rod 104 is provided with a contact post 10401, and several inserts distributed in a star-shaped pattern along the circumference are welded on the contact post 10401; the rotating rod 104 has slots corresponding to the inserts; by manually pressing the contact post 104... 01, so that the insert block on it is inserted into the slot of the rotating rod 104, thereby locking the rotating rod 104; each rotating rod 104 is wound with a steel cable 3 105, and the end of the steel cable 3 105 passes through the cavity 10301 and is located on the outside of the square rod 103; two steel cables 3 105 located on the same side, one of the steel cables 3 105 is provided with a positioning post 2 10501 at its end, and the other steel cable 3 105 is provided with a limit sleeve 10502 at its end, and the positioning post 2 10501 and the hook groove 8003 of the lifting device 8 are located on the same side.

[0028] Each main hook 91 is equipped with a layer of silicone coating; during hoisting, it not only protects the inner wall of the seamless steel pipe, but also increases the friction between the main hook 91 and the seamless steel pipe, thereby improving stability.

[0029] Each limiting block 92 is provided with several V-shaped grooves 9201 that are evenly distributed. When hoisting the seamless steel pipe, the friction of the limiting block 92 is increased by the several V-shaped grooves 9201, thereby improving the stability of the limiting block 92 in fixing the seamless steel pipe.

[0030] An electromagnet 2001 is installed in the middle of the lower side of the crossbeam 2. The electromagnet 2001 attracts the seamless steel pipe on the upper layer, thereby improving the stability of the equipment in hoisting the seamless steel pipe.

[0031] The working steps of this embodiment are as follows: The following directions are Figure 1Using the following reference point: the direction of the crossbeam with the number 2 is forward; the rotations described below are all observed from the perspective of front to back, top to bottom, and right to left.

[0032] During installation, the operator connects the lifting block 1 of the seamless steel pipe hoisting equipment to the bridge crane and connects an external power source to all components that require electric drive.

[0033] When handling a large quantity of small-diameter seamless steel pipes, the operator controls the bridge crane to move the equipment above the stack of seamless steel pipes. The six lifting devices 8 on both sides of the equipment are positioned at both ends of the seamless steel pipes. The equipment is then slowly lowered, positioning the lifting devices 8 on both sides of the seamless steel pipes, with the crossbeam 2 spanning over the stack of pipes. The positioning posts 8002 of the six lifting devices 8 on the same side are then manually slid into the hook grooves 8003 of the adjacent lifting devices 8, bringing the six lifting devices 8 on the same side together. Figure 2 As shown, the operator then controls the two electric winches 6 to rotate, releasing several steel cables 7 wound on them. Then, the operator grabs six lifting devices 8 and moves them downwards, causing the hooks 9 and steel cables 7 to move downwards together. After the six lifting devices 8 have moved to the height of the steel pipes, the hooks 9 on the six lifting devices 8 are pushed into the six seamless steel pipes side by side. At this time, the operator controls the two electric winches 6 to rotate, winding up the released steel cables 7, causing the connected components and lifting devices 8 to move upwards, forcing the hooks 9 to rotate in the grooves 8001, changing from an inclined position to a horizontal position, so that the hooks 9 of each lifting device 8 are hooked onto the wall of the corresponding seamless steel pipe. After the steel cables 7 are kept taut, the operator controls the two electric winches 6 to stop rotating.

[0034] Simultaneously, the operator grasps the two square rods 103 and rotates them downwards, changing them from a horizontal to an inclined position. Then, the operator sequentially grasps the positioning posts 10501 and limiting sleeves 10502 of the two steel cables 105 and moves them downwards, securing the positioning posts 10501 and limiting sleeves 10502 onto the outermost positioning posts 8002 or hook grooves 8003 of the six lifting devices 8. By manually pressing the contact post 10401, the insert block on it is inserted into the slot of the rotating rod 104, thereby locking the rotating rod 104 (note that the rotating rod 104 is normally rotatable, facilitating the operator's pulling of the steel cables 105). The pulled-out steel cables 105 and square rods 103 are located on both sides of the hoisted seamless steel pipe, such as... Figure 7As shown, the extended steel cable 105 can both restrict the seamless steel pipe between the crossbeam 2 and the lifting device 8 to prevent it from falling from both sides, and pull all the lifting devices 8 so that the six lifting devices 8 are always in contact with the seamless steel pipe. Then, the operator controls the bridge crane to lift the seamless steel pipe between the crossbeam 2 and the lifting device 8. In this way, by bringing multiple lifting devices 8 together and pulling them to the seamless steel pipe in the middle and lower layers, the hook 9 will lock the seamless steel pipes side by side. Then, the square bar 103 will be rotated to both sides of the seamless steel pipe to be transported, so that the steel cable 105 is connected to the brought-to-side lifting devices 8, which limits the two sides of the seamless steel pipe to be transported to prevent it from rolling or falling off, thus realizing the batch transport of seamless steel pipes and improving the transport efficiency of seamless steel pipes.

[0035] When handling seamless steel pipes of different lengths, the operator can control two winches 3 to run synchronously, releasing the corresponding steel cable 4. At the same time, the operator controls the telescopic parts of the two hydraulic push rods 102 to push outward, driving the two connecting blocks 5 and the connected components to move to both sides. Meanwhile, the slide rod 101 slides on the crossbeam 2. According to the length of the seamless steel pipe, the two connecting blocks 5 are moved to the end of the seamless steel pipe, so that the lifting device 8 and hook 9 are fixed at both ends of the seamless steel pipe, making it convenient for the operator to lift seamless steel pipes of different lengths.

[0036] It should be noted that during the clamping of seamless steel pipes, the limiting block 92 is rotatably connected to the main hook 91 via a torsion spring, which can accommodate seamless steel pipes of different thicknesses.

[0037] It should be noted that when handling a single seamless steel pipe, simply separate the folded lifting devices 8.

[0038] Example 2: Based on Example 1, such as Figure 1 , Figure 2 and Figure 5 As shown, it also includes an electric winder 201 and a protective net 202; an electric winder 201 is installed on the upper side of each connecting block 5, and the electric winder 201 is located outside the electric winch 6; a protective net 202 is wound inside each electric winder 201; a hanging slot 8004 is opened on each lifting device 8.

[0039] The protective net 202 is made of metal.

[0040] It also includes a rubber block 203; a rubber block 203 is provided on the lower side of each connecting block 5.

[0041] The working principle of this embodiment is as follows: Because seamless steel pipes lack effective fixing and are handled in large quantities, they are prone to slipping from both ends. Therefore, before the seamless steel pipes are lifted, the operator controls two electric retractors 201 to release the protective net 202 inside the electric retractors 201. Then, the operator manually pulls the spread-out protective net 202 downwards and fastens the ends of the protective net 202 onto the hanging slots 8004 of all connecting blocks 5. The unfolded metal protective net 202 restricts the ends of the seamless steel pipes to be lifted, preventing them from slipping from both ends during transportation and threatening the safety of on-site personnel and equipment. This improves the practicality of the equipment. In addition, the metal protective net 202 can also play a certain role in bearing weight during transportation, sharing the pressure of the steel cable 7.

[0042] It should be noted that the rubber block 203 on the lower side of the connecting block 5 can increase the friction between the seamless steel pipe and the connecting block 5, making it less likely to collide or swing, reducing the risk of handling and improving the stability of handling.

[0043] Although the invention has been described with reference to exemplary embodiments, it should be understood that the invention is not limited to the disclosed exemplary embodiments. The scope of the following claims should be given the broadest interpretation so as to cover all variations and equivalent structures and functions.

Claims

1. A hoisting device for seamless steel pipes, comprising a hoisting block (1) and a crossbeam (2) mounted on the hoisting block (1); characterized in that: It also includes an extension component; the extension component is connected to the crossbeam (2); a connecting block (5) is connected to each end of the crossbeam (2); a limiting groove (5001) is opened on each connecting block (5); an electric winch (6) is installed on each connecting block (5); several steel cables (7) are wound on each electric winch (6) in an equidistant manner, and each steel cable (7) passes through the corresponding limiting groove (5001); a lifting device (8) is fixed to the end of each steel cable (7); each lifting device (8) 8) Each of the above is provided with a groove (8001); each groove (8001) is rotatably connected to a hook (9) by a torsion spring, and all hooks (9) face the crossbeam (2); each lifting device (8) is provided with a positioning post (8002) on one side; each lifting device (8) is provided with a hook groove (8003) on the other side, and each positioning post (8002) can slide in the hook groove (8003) on the adjacent lifting device (8); the extension assembly is used to drive the two connecting blocks (5) to move to both sides.

2. The hoisting equipment for seamless steel pipes according to claim 1, characterized in that: The extension assembly includes a winch (3); two winches (3) are installed on the crossbeam (2) respectively on both sides of the hoisting block (1); each winch (3) is wound with a steel cable (4), and the two ends of the steel cable (4) are connected to the connecting block (5); two slide rods (101) are slidably connected to each end of the crossbeam (2), and the slide rods (101) on the same side are fixedly connected to the connecting block (5); a hydraulic push rod (102) is installed on the left and right sides of the crossbeam (2), and the telescopic parts of the two hydraulic push rods (102) are fixedly connected to a connecting block (5).

3. The hoisting equipment for seamless steel pipes according to claim 2, characterized in that: The hook (9) consists of a main hook (91) and a limiting block (92). The limiting block (92) is rotatably connected to the main hook (91) via a torsion spring.

4. The hoisting equipment for seamless steel pipes according to claim 3, characterized in that: It also includes a square rod (103); each side of each connecting block (5) is rotatably connected to a square rod (103) via a torsion spring; each square rod (103) has a cavity (10301) inside; each cavity (10301) is rotatably connected to a rotating rod (104); each rotating rod (104) is provided with a contact post (10401), and several inserts arranged in a star-shaped pattern along the circumference are fixedly connected to the contact post (10401), and the rotating rod (104) has inserts corresponding to the inserts. The groove; each rotating rod (104) is wound with a steel cable three (105), and the end of the steel cable three (105) passes through the cavity (10301) and is located on the outside of the square rod (103); two steel cables three (105) located on the same side, one of the steel cables three (105) is provided with a positioning post two (10501) at the end, and the other steel cable three (105) is provided with a limit sleeve (10502) at the end, and the positioning post two (10501) and the hook groove (8003) of the lifting device (8) are located on the same side.

5. The hoisting equipment for seamless steel pipes according to claim 4, characterized in that: Each main hook (91) has a layer of silicone coating.

6. The hoisting equipment for seamless steel pipes according to claim 4, characterized in that: Each limiting block (92) is provided with several V-shaped grooves (9201) that are evenly distributed.

7. The hoisting equipment for seamless steel pipes according to claim 1, characterized in that: An electromagnet (2001) is installed in the middle of the lower side of the crossbeam (2).

8. The hoisting equipment for seamless steel pipes according to claim 4, characterized in that: It also includes an electric winder (201); each connecting block (5) is equipped with an electric winder (201), and the electric winder (201) is located outside the electric winch (6); each electric winder (201) winds up a protective net (202); each lifting device (8) has a hanging slot (8004).

9. A hoisting device for seamless steel pipes according to claim 8, characterized in that: The protective net (202) is made of metal.

10. A hoisting device for seamless steel pipes according to claim 8, characterized in that: It also includes rubber blocks (203); each connecting block (5) has a rubber block (203) on its underside.

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