Steel pipe lifting device convenient to disassemble

Abstract

The utility model belongs to the technical field of lifting appliance, and relates to a steel pipe lifting appliance convenient to disassemble, which comprises a main rod, fasteners, operating pieces, springs, spring limit plates, connecting pieces and lifting rings. Two fasteners with opposite rotating directions are rotatably connected to the first end of the main rod. The operating pieces and the springs are sleeved on the main rod. The spring limit plates are arranged on the main rod. The springs are between the operating pieces and the spring limit plates. The connecting pieces are arranged between the operating pieces and each fastener. The lifting rings are arranged on the second end of the main rod. The utility model can be conveniently and quickly disassembled from the steel pipe, and is suitable for steel pipes with different inner diameters.

Description

Technical Field

[0001] This utility model relates to the field of lifting equipment technology, and in particular to a steel pipe lifting equipment that is easy to assemble and disassemble. Background Technology

[0002] Currently, when painting steel pipes, the pipes need to be lifted using hoisting equipment and passed through a painting booth to complete the painting process. To avoid obscuring the outer surface of the steel pipe, a steel pipe plug is generally inserted into the end of the pipe for hoisting. Existing steel pipe plugs are tubular structures with a certain taper on the outer side. Workers secure the plug by hammering it into the pipe.

[0003] The above-mentioned steel pipe plugs have the following main problems: On the one hand, they are inconvenient to disassemble and assemble, especially the process of pulling the steel pipe plug out of the steel pipe. Due to the large friction between the two and the possibility of paint seeping into the space between them, it is quite difficult to manually pull out the steel pipe plug. On the other hand, they have poor applicability. One type of steel pipe plug is often only suitable for steel pipes with one inner diameter. Utility Model Content

[0004] The purpose of this utility model is to solve the problems existing in the prior art and provide a steel pipe lifting tool that is easy to assemble and disassemble, which can be easily and quickly disassembled from the steel pipe, and is applicable to steel pipes of different inner diameters.

[0005] The objective of this utility model is achieved through the following technical solution: A steel pipe lifting device that is easy to assemble and disassemble includes a main rod, fasteners, an operating component, a spring, a spring limiting plate, a connecting component, and a lifting ring. At least two fasteners with opposite rotation directions are rotatably connected to the first end of the main rod. The operating component and the spring are both sleeved on the main rod. The spring limiting plate is located on the main rod, and the spring is located between the operating component and the spring limiting plate. A connecting component is provided between the operating component and each fastener. The lifting ring is located at the second end of the main rod.

[0006] Preferably, the fastener is provided with an arc-shaped contact surface that matches the inner wall of the steel pipe.

[0007] Preferably, the arc-shaped contact surface is provided with an anti-slip structure.

[0008] Preferably, the fastener has a weight-reducing hole.

[0009] Preferably, the first end of the main rod is provided with a mounting base, and fasteners are rotatably connected to the opposite ends of the mounting base.

[0010] Preferably, each end of the mounting base is rotatably connected to two fasteners, with the two fasteners on the same end rotating in opposite directions.

[0011] Preferably, the two fasteners with the same rotation direction are located on the inner side or on the outer side.

[0012] Preferably, the operating component includes a sliding sleeve and a pull plate disposed on the outer surface of the sliding sleeve, and one end of the connecting component is connected to the pull plate.

[0013] Preferably, the end of the sliding sleeve is provided with a spring limiting groove.

[0014] Preferably, hooks are provided at both ends of the connector, and hook holes are provided on the pull plate and the fastener.

[0015] The advantages of this utility model are: 1. By adjusting the opening size of the lifting device, it is easy to disassemble and assemble from inside the steel pipe; at the same time, under the return action of the spring, the lifting device can contact the inner wall of the steel pipe within a certain range of inner diameter, and has strong adaptability to steel pipes with different inner diameters. 2. The entire lifting device is easy to operate. Simply pull the operating part to rotate the fasteners to adjust the size of the lifting device. 3. The connection strength between the lifting device and the steel pipe can be improved by increasing the number of fasteners, thus meeting the lifting requirements of steel pipes of different specifications. Attached Figure Description

[0016] Figure 1 This is a structural diagram of a steel pipe lifting device that is easy to assemble and disassemble, provided in Embodiment 1 of this specification; Figure 2 This is a front view of a steel pipe lifting device that is easy to assemble and disassemble, as provided in Embodiment 1 of this specification; Figure 3 A bottom view of a steel pipe lifting device that is easy to assemble and disassemble, provided in Embodiment 1 of this specification; Figure 4 This is a front view of a steel pipe lifting device in its retracted state, which is easy to assemble and disassemble, as provided in Embodiment 1 of this specification. Figure 5 This is a schematic diagram illustrating the connection state between a steel pipe lifting device and a steel pipe, as provided in Embodiment 1 of this specification. Figure 6 This is a schematic diagram of the structure of the operating component provided in the embodiments of this specification; Figure 7 This is a schematic diagram of the structure of the connector provided in the embodiments of this specification; Figure 8 A bottom view of a steel pipe lifting device that is easy to assemble and disassemble, provided in Embodiment 2 of this specification; In the diagram: 1-Main rod; 11-Mounting base; 12-Rotating shaft; 2-Fastener; 21-Arc-shaped contact surface; 22-Weight reduction hole; 3-Operating component; 31-Sliding sleeve; 311-Spring limiting groove; 32-Pull plate; 4-Spring; 5-Spring limiting plate; 6-Connector; 61-Hook; 7-Lifting ring; 8-Steel pipe. Detailed Implementation

[0017] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0018] Example 1 like Figure 1-3 As shown, this embodiment provides a steel pipe lifting device that is easy to assemble and disassemble, including a main rod 1, fasteners 2, an operating component 3, a spring 4, a spring limiting plate 5, a connecting component 6, and a lifting ring 7. A mounting base 11 is vertically connected to the first end of the main rod 1. A fastener 2 is rotatably connected to each of the opposite ends of the mounting base 11 via a rotating shaft 12. The operating component 3 and the spring 4 are both sleeved on the main rod 1, with the operating component 3 closer to the fastener 2 than the spring 4. The spring limiting plate 5 is located on the main rod 1, and the spring 4 is positioned between the operating component 3 and the spring limiting plate 5. A connecting component 6 is provided between the operating component 3 and each fastener 2. The lifting ring 7 is located at the second end of the main rod 1. Figure 2 As shown, taking the view where the main rod 1 is vertical and the rotating shaft 12 is in the inward or outward direction as an example, the steel pipe lifting device is in its initial state. The two fasteners 2 have the maximum opening size in the left and right directions, which needs to be greater than the inner diameter of the steel pipe to be lifted. When the operating part 3 is pulled upward along the main rod 1, the operating part 3 will compress the spring 4 on the one hand, and on the other hand, it will pull the two fasteners 2 to rotate in the opposite direction through the connecting part 6, for example... Figure 4 In the state shown, the two fasteners 2 have a small opening in the left and right directions, allowing them to be easily inserted into the steel pipe 8. Then, the operating member 3 is released, and under the action of the spring 4, the operating member 3 gradually returns to its original position downwards until the two fasteners 2 abut against the inner wall of the steel pipe. Figure 5 As shown, when the lifting device lifts the steel pipe through the lifting ring, the lifting device will exert a pulling force on the main rod 1 towards the outside of the steel pipe. This force will cause the two fasteners 2 to tend to spread apart, which will further increase the pressure and friction between the fasteners 2 and the inner wall of the steel pipe, thereby improving the connection strength between the lifting device and the steel pipe. In actual operation, the thumb can be inserted into the lifting ring 7 to hold the main rod 1, and then the index and middle fingers can be used to pull the operating part 3, which can be operated with one hand, which is convenient and efficient.

[0019] It should be noted that this embodiment is mainly suitable for steel pipes with small inner diameters and light weight. On the one hand, although the size of the lifting device in the opening and closing direction of the two fasteners 2 is adjustable, the size of the lifting device in the length direction of the rotating shaft 12 is fixed. This limits the minimum inner diameter of the steel pipe to which the lifting device is applicable. In this embodiment, there are only two fasteners 2 in the length direction of the rotating shaft 12, so the size in this direction is smaller and suitable for steel pipes with small inner diameters. On the other hand, lifting is achieved by only the two fasteners 2 contacting the inner wall of the steel pipe, and the connection strength is insufficient for steel pipes with large weight and large inner diameter.

[0020] Specifically, since this lifting device can be applied to steel pipes with various inner diameters ranging from the minimum to the maximum opening size, the fastener 2 is designed with a fan-shaped structure to ensure stable contact with the inner wall of the steel pipe at every rotation angle. Specifically, the outward-facing side of the fastener 2 has an arc-shaped contact surface 21 that conforms to the inner wall of the steel pipe. Furthermore, to increase the friction between the arc-shaped contact surface 21 and the inner wall of the steel pipe, an anti-slip structure can be provided on the arc-shaped contact surface 21. This anti-slip structure can be an anti-slip texture or a rubber anti-slip layer. To reduce the overall weight of the lifting device, the fastener 2 is equipped with weight-reducing holes 22.

[0021] like Figure 6 As shown, the operating component 3 includes a sliding sleeve 31 and a pull plate 32 disposed on the outer surface of the sliding sleeve 31. One end of the connecting component 6 is connected to the pull plate 32, which also provides a force application point for the finger. The end of the sliding sleeve 31 is provided with a spring limiting groove 311 to ensure the stability of the spring position, that is, to ensure the stability of the reset force of the operating component. Figure 7 As shown, the connector 6 can be made of steel wire, with hooks 61 made by bending it at both ends. Hook holes are also provided on the pull plate 32 and the fastener 2 to achieve connection and facilitate disassembly, maintenance or replacement.

[0022] Example 2 like Figure 8 As shown, unlike Embodiment 1, each end of the mounting base 11 is rotatably connected to two fasteners 2. The two fasteners 2 on the same end rotate in opposite directions. In this way, four contact points can be formed with the inner wall of the steel pipe, resulting in higher connection strength and stability, and making it easier to meet the needs of large-diameter and heavy steel pipes. At the same time, the dimension of the rotating shaft 12 in the length direction will also be increased in this embodiment, which will limit the applicability of the lifting device to small inner diameter steel pipes. Therefore, this embodiment is mainly suitable for steel pipes with slightly larger inner diameters.

[0023] To further ensure the balance of forces between the lifting device and the inner wall of the steel pipe, the two fasteners 2 with the same rotation direction are located on the inner side or on the outer side. That is, the two fasteners 2 on the inner side in the figure rotate to one side, while the two fasteners 2 on the outer side rotate to the other side.

[0024] The above are merely preferred embodiments of this utility model, and are implementations based on the overall concept of this utility model. Furthermore, the scope of protection of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the scope of protection of this utility model. Therefore, the scope of protection of this utility model should be determined by the scope of the claims.

Claims

1. A steel pipe lifting device that is easy to assemble and disassemble, characterized in that, It includes a main rod, fasteners, operating components, springs, spring limit plates, connectors, and lifting rings. At least two fasteners with opposite rotation directions are rotatably connected to the first end of the main rod. The operating components and springs are both sleeved on the main rod. The spring limit plates are located on the main rod, and the springs are located between the operating components and the spring limit plates. Connectors are provided between the operating components and each fastener. The lifting rings are located at the second end of the main rod.

2. The easily detachable steel pipe lifting device according to claim 1, characterized in that, The fastener is provided with an arc-shaped contact surface that matches the inner wall of the steel pipe.

3. The easily detachable steel pipe lifting device according to claim 2, characterized in that, The arc-shaped contact surface is provided with an anti-slip structure.

4. The easily detachable steel pipe lifting device according to claim 1, characterized in that, The fastener has a weight-reducing hole.

5. A steel pipe lifting device that is easy to assemble and disassemble according to claim 1, characterized in that, The first end of the main rod is provided with a mounting base, and fasteners are rotatably connected to the opposite ends of the mounting base.

6. A steel pipe lifting device that is easy to assemble and disassemble according to claim 5, characterized in that, Each end of the mounting base is rotatably connected to two fasteners, with the two fasteners on the same end rotating in opposite directions.

7. A steel pipe lifting device that is easy to assemble and disassemble according to claim 6, characterized in that, Two fasteners rotating in the same direction are either both on the inside or both on the outside.

8. A steel pipe lifting device that is easy to assemble and disassemble according to claim 1, characterized in that, The operating component includes a sliding sleeve and a pull plate disposed on the outer surface of the sliding sleeve, and one end of the connecting component is connected to the pull plate.

9. A steel pipe lifting device that is easy to assemble and disassemble according to claim 8, characterized in that, The end of the sliding sleeve is provided with a spring limiting groove.

10. A steel pipe lifting device that is easy to assemble and disassemble according to claim 8, characterized in that, Both ends of the connector are provided with hooks, and the pull plate and fastener are provided with hook holes.

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