Lifting appliance for lifting large-diameter pipeline

Abstract

A lifting appliance for lifting a large-diameter pipeline comprises a lifting hook and a lifting rope connected with the upper end of the lifting hook, the lifting hook comprises an inclined section, a vertical section fixedly connected with the lower portion of the inclined section and a horizontal section fixedly connected with the lower portion of the vertical section, a cushion block is arranged on the surface of the horizontal section, and a mounting structure is arranged between the horizontal section and the cushion block; the installation structure comprises a dovetail installation groove formed in the horizontal section, a cushion block is matched with the dovetail installation groove, the lower surface of the cushion block is provided with an inclined face, the inclined face is correspondingly arranged at the free end of the horizontal section, and a fastening wedge block matched with the inclined face is arranged between the cushion block and the dovetail installation groove. By arranging the cushion block, the cushion block is in flexible contact with the pipeline, damage to the pipeline is avoided, and in addition, by arranging a special mounting structure, the cushion block can be conveniently and rapidly replaced.

Description

Technical Field

[0001] The present application relates to the field of building processing, and more particularly, to a lifting tool for hoisting large-diameter pipes. Background Art

[0002] During the construction process of hoisting and lowering concrete pipes in municipal engineering, slings or wire ropes are often used as suspension ropes. Generally, when hoisting concrete pipes with a relatively large diameter (diameter greater than 1.8 m), high-strength knitted slings are required, and the slings need to be tied to the object to be lifted for hoisting, requiring a relatively long sling length. For large-diameter pipes, due to their large height and width, it is relatively difficult to make bolt connections, resulting in low work efficiency. When using a wire rope as a suspension rope, firstly, it is difficult to tie, and secondly, for large-diameter pipes, their self-weights are relatively large. If the wire rope is directly used for hoisting and contacts the concrete pipe directly, it is easy to damage the pipe. If a cushion is used between the wire rope and the pipe surface, the hoisting efficiency is not high for hoisting large-scale pipes.

[0003] In the prior art, such as CN 219058303 U, a fixture for quickly hoisting a socket-type flexible joint steel socket drain pipe is disclosed. In the above solution, since the two ends of the hoisted object are flexible joints, the fixture makes flexible contact with the two ends of the hoisted object during clamping. However, for a rigid hoisted object, especially a concrete pipe used in construction, there is still a risk of damaging the pipe edges when using this lifting tool.

[0004] In view of this, those skilled in the art need to improve the lifting tool for hoisting concrete pipes to overcome the above technical problems. Summary of the Utility Model

[0005] The main purpose of the present application is to provide a lifting tool for hoisting large-diameter pipes. By providing rubber cushion blocks on the lifting tool, flexible contact is made between the cushion blocks and the pipe, avoiding damage to the pipe. In addition, by providing a special installation structure, it is convenient to quickly replace the cushion blocks.

[0006] To achieve the above purpose, in a first aspect, the present application provides a lifting tool for hoisting large-diameter pipes, including a hook and a suspension rope connected to the upper end of the hook. The hook includes an inclined section, a vertical section fixedly connected to the lower part of the inclined section, and a horizontal section fixedly connected to the lower part of the vertical section. A cushion block is arranged on the surface of the horizontal section, and an installation structure is arranged between the horizontal section and the cushion block;

[0007] The installation structure includes a dovetail installation groove opened on the horizontal section. The cushion block is matched with the dovetail installation groove. The lower surface of the cushion block has an inclined surface, and the inclined surface is correspondingly arranged at the free end of the horizontal section. A fastening wedge block matched with the inclined surface is arranged between the cushion block and the dovetail installation groove.

[0008] Further improved, the cushion block is a rubber cushion block.

[0009] Further improved, the thickness of the cushion block is 2 cm, and the thickness of the cushion block is greater than the depth of the dovetail installation groove.

[0010] Further improved, the included angle between the inclined section and the vertical section is 110°.

[0011] Further improved, a connecting hole with a diameter of 2 cm is opened in the upper part of the inclined section, and the lifting rope is connected to the inclined section through the connecting hole.

[0012] Further improved, a wire rope clip is arranged at the end of the lifting rope, and the wire rope clip is matched with the connecting hole.

[0013] Further improved, a limiting part is arranged at the end of the fastening wedge block, and the thickness of the limiting part is greater than the maximum thickness of the fastening wedge block.

[0014] Further improved, the inclined section, the vertical section and the horizontal section are integrally formed.

[0015] A lifting tool for hoisting large-diameter pipelines provided by the utility model, compared with the prior art, has the beneficial effects that by arranging rubber cushion blocks on the lifting tool, flexible contact is made between the cushion blocks and the pipelines, damage to the pipelines is avoided. In addition, dovetail installation grooves are opened on the lifting tool, the cushion blocks are installed in the dovetail installation grooves and then fixed by fastening wedge blocks, avoiding fixing by glue and facilitating replacement after wear of the cushion blocks. In addition, during hoisting, since the gravity of the pipeline directly presses on the cushion blocks, the fastening wedge blocks are not easily loosened under the influence of gravity and have good stability. Description of the Drawings

[0016] The drawings forming a part of this application are used to provide a further understanding of this application, making other features, objects and advantages of this application more obvious. The schematic embodiments and descriptions of the drawings of this application are used to explain this application and do not constitute an improper limitation of this application. In the drawings:

[0017] Figure 1 is the front view of the utility model;

[0018] Figure 2 is the side view of the utility model;

[0019] Figure 3 is the front view of the cushion block;

[0020] Figure 4 is the front view of the fastening wedge block;

[0021] Figure 5It is a hoisting schematic diagram.

[0022] Among them: 1. Hoisting rope; 2. Inclined section; 3. Vertical section; 4. Horizontal section; 5. Spacer; 6. Dovetail installation groove; 7. Inclined surface; 8. Tightening wedge; 9. Connection hole; 10. Concrete pipe; 11. Limiting part. Specific implementation manners

[0023] In order to enable those skilled in the art to better understand the solution of this application, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are only a part of the embodiments of this application, rather than all the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of this application.

[0024] It should be noted that the terms "first", "second", etc. in the description and claims of this application and the above-mentioned drawings are used to distinguish similar objects, and do not have to be used to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances for the embodiments of this application described here. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device including a series of steps or units does not have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0025] In this application, the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal", etc. is based on the orientation or positional relationship shown in the drawings. These terms are mainly used to better describe this application and its embodiments, and are not used to limit that the indicated devices, elements or components must have a specific orientation, or be constructed and operated in a specific orientation.

[0026] Moreover, in addition to being able to represent the orientation or positional relationship, some of the above terms may also be used to represent other meanings. For example, the term "upper" may also be used to represent a certain attachment relationship or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to specific circumstances.

[0027] In addition, the meaning of the term "plurality" should be two or more.

[0028] It should be noted that, without conflict, the embodiments in this application and the features in the embodiments can be combined with each other. The following will describe this application in detail with reference to the accompanying drawings and in combination with the embodiments.

[0029] As Figures 1-4 shown, a lifting tool for hoisting large-diameter pipelines includes a hook and a lifting rope 1 connected to the upper end of the hook. The hook includes an inclined section 2, a vertical section 3 fixedly connected to the lower part of the inclined section 2, and a horizontal section 4 fixedly connected to the lower part of the vertical section 3. Preferably, the inclined section 2, the vertical section 3, and the horizontal section 4 are integrally formed.

[0030] In view of the fact that the corners of the concrete pipeline 10 are easily damaged by the lifting tool in the current prior art, in this embodiment, a cushion block 5 is provided on the surface of the horizontal section 4, and the cushion block 5 is preferably a rubber cushion block 5.

[0031] Due to frequent hoisting, the cushion block 5 will be worn. After a period of time, the cushion block 5 needs to be replaced. Currently, the most common way to fix rubber to steel is by glue. If glue is used for fixing, it is more troublesome to replace the cushion block 5. Therefore, an installation structure is provided between the horizontal section 4 and the cushion block 5;

[0032] The installation structure includes a dovetail installation groove 6 opened on the horizontal section 4. The cushion block 5 is matched with the dovetail installation groove 6. The lower surface of the cushion block 5 has an inclined surface 7, and the inclined surface 7 is correspondingly arranged at the free end of the horizontal section 4. A fastening wedge block 8 matched with the inclined surface 7 is provided between the cushion block 5 and the dovetail installation groove 6.

[0033] The fastening wedge block 8 is used in cooperation with the inclined surface 7 on the cushion block 5 to press the cushion block 5 tightly into the dovetail installation groove 6. During hoisting, as Figure 5 shown, the gravity of the concrete pipeline 10 is directly pressed on the cushion block 5, and then acts on the fastening wedge block 8. Affected by gravity, the fastening wedge block 8 has good stability and is not easy to loosen. When it needs to be replaced, the fastening wedge block 8 can be directly taken out by an external force to replace the cushion block 5.

[0034] In this embodiment, preferably, the thickness of the cushion block 5 is 2 cm, and the thickness of the cushion block 5 is greater than the depth of the dovetail installation groove 6.

[0035] Preferably, the included angle between the inclined section 2 and the vertical section 3 is 110°.

[0036] To facilitate the connection between the suspension rope 1 and the hook, a connection hole 9 with a diameter of 2 cm is provided in the upper part of the inclined section 2. The suspension rope 1 is connected to the inclined section 2 through the connection hole 9. A wire rope clip is provided at the end of the suspension rope 1, and the wire rope clip is matched with the connection hole 9.

[0037] To facilitate the removal of the fastening wedge 8 by an external force, a limiting portion 11 is provided at the end of the fastening wedge 8. The thickness of the limiting portion 11 is greater than the maximum thickness of the fastening wedge 8. This limiting portion 11 can not only control the length of the fastening wedge 8 inserted into the dovetail installation groove 6 to prevent damage to the rubber cushion block 5 caused by excessive force during fastening, but also, when removing, the fastening wedge 8 can be removed by prying up the limiting portion 11 with a tool.

[0038] The above are only the preferred embodiments of the present application and are not used to limit the present application. For those skilled in the art, various changes and modifications can be made to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A lifting device for lifting large diameter pipes, characterized in that: The lifting device comprises a hook and a lifting rope connected to the upper end of the hook, wherein the hook comprises an inclined section, a vertical section fixedly connected to the lower part of the inclined section, and a horizontal section fixedly connected to the lower part of the vertical section, a cushion block is arranged on the surface of the horizontal section, and a mounting structure is arranged between the horizontal section and the cushion block; The mounting structure includes a dovetail mounting groove opened on the horizontal section, the pad block cooperates with the dovetail mounting groove, the lower surface of the pad block has an inclined surface, the inclined surface is correspondingly arranged at the free end of the horizontal section, and a fastening wedge block cooperating with the inclined surface is arranged between the pad block and the dovetail mounting groove.

2. A lifting device for lifting large diameter pipes as claimed in claim 1, characterized in that: The cushion block is a rubber cushion block.

3. A lifting device for lifting large diameter pipes as claimed in claim 2, characterized in that: The thickness of the cushion block is 2 cm, and the thickness of the cushion block is greater than the depth of the dovetail mounting groove.

4. A lifting device for lifting large diameter pipes according to claim 1, characterized in that: The angle between the inclined section and the vertical section is 110°.

5. A lifting device for lifting large diameter pipes according to claim 1, characterized in that: A connection hole with a diameter of 2 cm is opened on the upper part of the inclined section, and the suspension rope is connected to the inclined section through the connection hole.

6. A lifting device for lifting large diameter pipes as claimed in claim 5, characterized in that: The end of the suspension rope is provided with a wire rope buckle, and the wire rope buckle matches with the connecting hole.

7. A lifting device for lifting large diameter pipes according to claim 1, characterized in that: A limiting portion is disposed at the end of the fastening wedge block, and a thickness of the limiting portion is greater than a maximum thickness of the fastening wedge block.

8. A lifting device for lifting large diameter pipes as claimed in claim 1, characterized in that: The inclined section, the vertical section and the horizontal section are integrally formed.

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