Steel pipe hoisting device

Abstract

The utility model discloses a steel pipe hoisting device which comprises a main body, a lifting device and a lifting device, wherein a first sliding groove is formed in one side of the main body; the fixed arm is arranged at the lower end of the main body; the auxiliary arm is arranged in the first sliding groove in a sliding mode, and the other end of the auxiliary arm is connected with the lower end of the fixed arm in an inserted mode to form a sleeve structure used for clamping a steel pipe. The lifting lug is fixedly arranged at one end of the main body and used for connecting a rope; and the fastening device is arranged on one side of the fixed arm and is used for pre-tightening the steel pipe. The auxiliary arm is arranged, the auxiliary arm is connected with the main body in a sliding mode, the auxiliary arm can rotate with the main body when sliding to one side of the main body, the lower end of the auxiliary arm can be connected with the fixed arm in an inserted mode to form a closed cylindrical structure, and rapid clamping of the device on a steel pipe is achieved; and through the arranged fastening device, secondary pre-tightening is conducted on the preliminarily clamped steel pipe in a threaded transmission mode, threaded transmission has self-locking performance, and it is guaranteed that the steel pipe is clamped stably and firmly.

Description

Technical Field

[0001] The utility model belongs to the technical field of steel pipe lifting tools, in particular to a steel pipe lifting device. Background Art

[0002] When constructing building metal supports and processing insulated steel pipes, the pipes need to be hoisted, typically using a crane with a sling. Traditionally, this required slings to grip and lift the pipes at both ends. However, this process can easily damage the pipe end bevels, and the slings are not securely fastened to the pipes during lifting, posing a safety hazard. During lifting and transfer, the pipes are prone to falling off, creating safety risks.

[0003] In view of the above problems, it is urgent to design a clamping device that can quickly clamp and fix the steel pipe, and the lifting device can be quickly disassembled after the lifting is completed. Utility Model Content

[0004] The purpose of this utility model is to provide a steel pipe lifting device to solve the problems of cumbersome lifting equipment operation and low safety in the steel pipe lifting process mentioned in the above background technology. The following technical solution is provided: A steel pipe lifting device, comprising:

[0005] A main body, one side of which is provided with a first sliding groove;

[0006] a fixed arm, arranged at the lower end of the main body;

[0007] The auxiliary arm is slidably arranged in the first sliding groove, and the other end of the auxiliary arm is plugged into the lower end of the fixed arm to form a sleeve structure for clamping the steel pipe;

[0008] A lifting lug, fixedly provided at one end of the main body, for connecting a rope;

[0009] The fastening device is arranged on one side of the fixed arm and is used to pre-tighten the steel pipe.

[0010] In this technical solution, when the device is used, the auxiliary arm is first pulled out horizontally from the first slide groove. After pulling it out, the position of the auxiliary arm is swung to separate it from the fixed arm. Then, the steel pipe is buckled into the middle of the fixed arm, and then the auxiliary arm is swung to its original position. Then, the auxiliary arm is moved horizontally back to its original position. At this time, the auxiliary arm is plugged into the fixed arm and locked.

[0011] At this time, the steel pipe is initially inserted into the device, and finally the fastening device is rotated to extend one end of the fastening device and clamp the outer wall of the main steel pipe to clamp it. Finally, the rope is passed through the lifting ear to lift the steel pipe. In order to ensure the safety of lifting, two sets of devices are used to clamp the two ends of the steel pipe respectively. At this time, when the steel pipe is lifted, the two ends are lifted separately to achieve smooth transportation of the steel pipe.

[0012] In any of the above technical solutions, further, one side of the fixed arm is in the shape of an arc, and a plug-in slot is fixedly provided at the lower end of the arc. A stepped slot is fixedly provided at the inner end wall of the first slide groove, and the auxiliary arm includes a sliding cylinder horizontally slidingly arranged in the first slide groove, a tension spring is provided at one end of the first slide groove, and the other end of the tension spring is fixedly connected to the side of the sliding cylinder. A plug-in block is fixedly provided at the lower end of the sliding cylinder, and the plug-in block slides into the plug-in slot. The groove depths at both ends of the stepped groove are different, and a limit block is also provided in the middle of the sliding cylinder. The sliding cylinder and the limit block can rotate after sliding as a whole to the end with the deeper groove of the stepped groove.

[0013] In this technical solution, the depth of the stepped groove is just enough to allow the limit block to slide horizontally within it. The groove depth at the other end of the stepped groove is greater than the outer projection of the limit block. Therefore, when the sliding cylinder and the limit block slide horizontally to the larger portion of the stepped groove, the auxiliary arm can swing around the first groove. The first groove and the sliding cylinder both have cylindrical surfaces, ensuring relative rotation between them. The limit block is only long enough to ensure relative sliding of the sliding cylinder when it slides horizontally to the smaller end of the stepped groove, thereby limiting the sliding cylinder's rotational freedom.

[0014] The plug-in block and the plug-in slot are plugged together to form a closed cylindrical structure to fix the steel pipe.

[0015] In any of the above technical solutions, the fastening device further includes a recessed groove fixedly defined in the middle of the fixed arm, a clamping block slidably disposed in the middle of the recessed groove, one end of the clamping block extending outside the fixed arm, and a return spring disposed between the clamping block and a sidewall of the recessed groove. A bolt is disposed in the middle of the fixed arm, one end of the bolt abutting against the clamping block. A handle is disposed at the other end of the bolt.

[0016] In this technical solution, once the fixed arm and auxiliary arm form a cylindrical structure, the outer surface of the steel pipe is secured. Manually turning the handle now moves the bolt, which presses against the clamping block, forcing it out of the trough. Ultimately, the trough clamps the outer surface of the steel pipe, ensuring safe lifting. If the diameter of the steel pipe being hoisted is smaller than the cylindrical structure formed by the auxiliary and fixed arms, the operator can increase the extension distance of the fastening device to secure the smaller-diameter pipe, thereby expanding the device's range of use.

[0017] The beneficial effects of the present invention are as follows: through the provision of an auxiliary arm, the auxiliary arm is connected to the main body in a sliding manner, and when the auxiliary arm slides to one side of the main body, it can rotate with the main body, and the lower end of the auxiliary arm can be plugged into the fixed arm to form a closed cylindrical structure, thereby realizing the rapid clamping of the steel pipe by the device; and through the provision of a fastening device, a threaded transmission method is adopted to realize secondary pre-tightening of the steel pipe that has been preliminarily clamped, and the threaded transmission has self-locking properties, thereby ensuring stable and reliable clamping of the steel pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the appearance of the utility model;

[0019] Figure 2 It is a structural diagram of the utility model;

[0020] Figure 3 yes Figure 2 Schematic diagram of the AA position in the middle;

[0021] Figure 4 It is a structural diagram of the auxiliary arm in the utility model;

[0022] Figure 5 yes Figure 3 Schematic diagram of the middle BB. DETAILED DESCRIPTION

[0023] The following will be combined with the accompanying drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field are within the scope of protection of this application.

[0024] In the description of this application, it should be noted that the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the exemplary embodiments according to this application. For ease of description, the dimensions of the various parts shown in the drawings are not drawn according to the actual proportional relationship. Technologies, methods and equipment known to ordinary technicians in the relevant fields may not be discussed in detail, but where appropriate, the technologies, methods and equipment should be considered as part of the authorization specification. In all examples shown and discussed here, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following figures, so once an item is defined in one figure, it does not need to be further discussed in subsequent figures.

[0025] Example 1:

[0026] like Figure 1-2 As shown, this embodiment provides a steel pipe lifting device, comprising:

[0027] The main body 10 has a first slide groove 11 provided on one side of the main body 10;

[0028] A fixed arm 20 is provided at the lower end of the main body 10;

[0029] The auxiliary arm 30 is slidably disposed in the first sliding groove 11, and the other end of the auxiliary arm 30 is plugged into the lower end of the fixed arm 20 to form a sleeve structure for clamping the steel pipe;

[0030] A lifting lug 40 is fixedly provided at one end of the main body 10 and is used for connecting a rope;

[0031] The fastening device 50 is provided on one side of the fixed arm 20 and is used to pre-tighten the steel pipe.

[0032] In the present technical solution, when the present device is used, the auxiliary arm 30 is first pulled out horizontally from the first slide groove 11. After pulling it out, the position of the auxiliary arm 30 is swung to separate it from the fixed arm 20. Then, the steel pipe is buckled into the middle of the fixed arm 20, and then the auxiliary arm 30 is swung to its original position. Then, the auxiliary arm 30 is moved horizontally back to its original position. At this time, the auxiliary arm 30 is plugged into the fixed arm 20 and locked.

[0033] At this time, the steel pipe is initially inserted into the device, and finally the fastening device 50 is rotated so that one end of the fastening device 50 extends and clamps the outer wall of the main steel pipe to clamp it. Finally, the rope is passed through the lifting ear 40 to lift the steel pipe. In order to ensure the safety of lifting, two sets of devices are respectively clamped at the two ends of the steel pipe. At this time, when the steel pipe is lifted, the two ends are lifted separately to achieve smooth transportation of the steel pipe.

[0034] In a preferred embodiment of the present invention:

[0035] like Figure 2-5 As shown, specifically, one side of the fixed arm 20 is in the shape of an arc 21, and a plug-in slot 22 is fixedly provided at the lower end of the arc 21. A stepped slot 12 is fixedly provided in the middle of the first slide groove 11, and a stepped slot 12 is fixedly provided at the inner end wall of the first slide groove 11. The auxiliary arm 30 includes a sliding cylinder 31 that is horizontally slidably arranged in the first slide groove 11, and a tension spring 13 is provided at one end of the first slide groove 11, and the other end of the tension spring 13 is fixedly connected to the side of the sliding cylinder 31. A plug-in block 32 is fixedly provided at the lower end of the sliding cylinder 31, and the plug-in block 32 is slidably plugged into the plug-in slot 22. The groove depths at both ends of the stepped groove 12 are different, and a limit block 33 is also provided in the middle of the sliding cylinder 31. The sliding cylinder 31 and the limit block 33 can be rotated after sliding as a whole to the end of the stepped groove 12 with a larger groove depth.

[0036] In this technical solution, the depth of the stepped groove 12 is just enough to allow the limit block 33 to slide horizontally therein. The groove depth at the other end of the stepped groove 12 is greater than the outer projection of the limit block 33. Therefore, when the sliding cylinder 31 and the limit block 33 slide horizontally to the larger portion of the stepped groove 12, the auxiliary arm 30 can swing around the first chute 11. The outer surfaces of the first chute 11 and the sliding cylinder 31 are both cylindrical, ensuring that they can achieve relative rotation. The length of the limit block 33 is only sufficient to ensure that the sliding cylinder 31 slides horizontally relative to the smaller end of the stepped groove 12, thereby limiting the rotational freedom of the sliding cylinder 31.

[0037] The plug-in block 32 and the plug-in slot 22 are plugged together to form a closed cylindrical structure to fix the steel pipe.

[0038] In a preferred embodiment of the present invention:

[0039] like Figure 1-2 As shown, the fastening device 50 specifically includes a recessed groove 51 fixedly defined in the middle of the fixed arm 20. A clamping block 52 is slidably disposed in the middle of the recessed groove 51. One end of the clamping block 52 extends outside the fixed arm 20. A return spring 53 is disposed between the clamping block 52 and the sidewall of the recessed groove 51. A bolt 54 is disposed in the middle of the fixed arm 20, one end of the bolt 54 abutting against the clamping block 52. A handle 55 is disposed at the other end of the bolt 54.

[0040] In this technical solution, after the fixed arm 20 and the auxiliary arm 30 form a cylindrical structure, the outer surface of the steel pipe is secured. At this point, the handle 55 is manually rotated. This rotation of the handle 55 drives the bolt 54 to move and press against the clamping block 52, causing it to extend out of the sink 51. Finally, the sink 51 clamps the outer surface of the steel pipe, ensuring safe lifting. If the diameter of the steel pipe being lifted is smaller than the cylindrical structure formed by the auxiliary arm 30 and the fixed arm 20, the operator can increase the extension distance of the fastening device 50 to secure the smaller diameter steel pipe, thereby expanding the range of use of this device.

[0041] The embodiments of the present application are described above in conjunction with the accompanying drawings. Unless there is a conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of this application, ordinary technicians in this field can also make many forms without departing from the purpose of this application and the scope of protection of the claims, all of which are within the protection of this application.

Claims

1. A steel pipe lifting device, characterized in that: include: A main body (10), wherein a first sliding groove (11) is provided on one side of the main body (10); a fixed arm (20) disposed at the lower end of the main body (10); An auxiliary arm (30) is slidably disposed in the first sliding groove (11), and the other end of the auxiliary arm (30) is plugged into the lower end of the fixed arm (20) to form a sleeve structure for clamping a steel pipe; a lifting lug (40) fixedly disposed on one end of the main body (10) and used for connecting a rope; A fastening device (50) is provided on one side of the fixed arm (20) and is used for pre-tightening the steel pipe.

2. A steel pipe lifting device according to claim 1, characterized in that: One side of the fixed arm (20) is in the shape of a circular arc (21), and a plug-in slot (22) is fixedly provided at the lower end of the circular arc (21).

3. A steel pipe lifting device according to claim 2, characterized in that: A stepped groove (12) is fixedly provided at the inner end wall of the first slide groove (11); the auxiliary arm (30) includes a sliding cylinder (31) horizontally slidably arranged in the first slide groove (11); a tension spring (13) is provided at one end of the first slide groove (11); and the other end of the tension spring (13) is fixedly connected to the side of the sliding cylinder (31).

4. A steel pipe lifting device according to claim 3, characterized in that: A plug-in block (32) is fixedly provided at the lower end of the sliding cylinder (31), and the plug-in block (32) is slidably plugged into the plug-in slot (22).

5. The steel pipe lifting device according to claim 4, characterized in that: The groove depths at both ends of the stepped groove (12) are different, and a limiting block (33) is further provided in the middle of the sliding cylinder (31). The sliding cylinder (31) and the limiting block (33) can rotate when the entirety of the sliding cylinder (31) and the limiting block (33) slide to the end with the wider dimension of the stepped groove (12).

6. The steel pipe lifting device according to claim 1, characterized in that: The fastening device (50) comprises a recessed groove (51) fixedly provided in the middle of the fixed arm (20), a clamping block (52) being slidably provided in the middle of the recessed groove (51), one side of the clamping block (52) extending outside the fixed arm (20), and a return spring (53) being provided between the clamping block (52) and the side wall of the recessed groove (51).

7. The steel pipe lifting device according to claim 6, characterized in that: A bolt (54) is provided in the middle of the fixed arm (20), and one end of the bolt (54) abuts against the clamping block (52).

8. The steel pipe lifting device according to claim 7, characterized in that: The other end of the bolt (54) is provided with a handle (55).

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