Lifting hook for lifting hollow prefabricated part

Abstract

The utility model discloses a lifting hook for lifting a hollow prefabricated part, which comprises a hook body, the hook body comprises a side groove which is formed by sequentially connecting a first connecting arm, a base part and a second connecting arm and is used for at least partially accommodating the hollow prefabricated part, and the hook body is provided with two connecting plates at the top of the second connecting arm at intervals; the two connecting plates are provided with a lifting shaft, and the outer diameter of the two ends of the lifting shaft is larger than that of the middle of the lifting shaft. The first connecting arm hooks the inner wall of the through hole of the hollow prefabricated part, a sling of lifting equipment hooks the middle of the lifting shaft, and as the outer diameters of the two ends of the lifting shaft are larger than the outer diameter of the middle of the lifting shaft, transverse sliding of the sling on the lifting shaft during lifting is limited, and the stress point of the sling and the stress point of the first connecting arm are roughly located on the same vertical line; and the conditions of inclination, shaking, even rollover and falling of the prefabricated part in the hoisting process are avoided, and the safety and reliability of the hoisting process are improved.

Description

Technical Field

[0001] The utility model relates to the field of a hollow prefabricated component lifting device, in particular to a lifting hook for a hollow prefabricated component lifting. Background Art

[0002] Prefabricated components have advantages such as good structural performance and fast construction speed. Hollow prefabricated components have the advantages of low production cost and convenient transportation in addition to the above advantages. Hollow prefabricated components have through holes axially penetrating the two ends of the pile body. At present, the lifting of hollow prefabricated components is often carried out by extending two hooks into the two ends of the through hole. The hooks are connected to the slings of the lifting equipment. The lifting equipment lifts the hooks and tightens the slings so that the two hooks are hooked tightly to the inner wall of the through hole of the hollow prefabricated component. After the lifting is completed, the lifting equipment loosens the slings and the hooks are removed.

[0003] The existing hook includes a hook body consisting of an upper arm, a straight arm and a hook head. The upper arm is provided with a lifting shaft. The hook head contacts the inner wall of the through hole of the hollow prefabricated component during lifting. The sling hook is hung on the lifting shaft. In order to facilitate the installation of the sling, the axial length of the lifting shaft is relatively long. During the lifting process, the sling is easy to slide along the lifting shaft, resulting in the force points of the sling and the hook head are not in a straight line, causing tilting during lifting, lifting is not smooth, and there are safety hazards. Utility Model Content

[0004] The purpose of the utility model is to provide a method to solve the problems existing in the background technology.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A hook for lifting hollow prefabricated components comprises a hook body, wherein the hook body comprises a side groove formed by sequentially connecting a first connecting arm, a base and a second connecting arm for at least partially accommodating the hollow prefabricated components, wherein the hook body is provided with two connecting plates spaced apart at the top of the second connecting arm, and a hanging shaft is installed on the two connecting plates, and the outer diameters of the two ends of the hanging shaft are larger than the outer diameter of the middle part of the hanging shaft.

[0007] Preferably, the suspension shaft includes a mounting shaft passing through the two connecting plates and a limiting sleeve axially mounted on the mounting shaft, the limiting sleeve is located between the two connecting plates, and the outer diameters of the two ends of the limiting sleeve are larger than the outer diameter of the middle portion of the limiting sleeve.

[0008] Preferably, the limiting sliding sleeve comprises a straight cylinder section located in the middle and a conical cylinder section connected to both ends of the straight cylinder section, and the outer diameter of the conical cylinder section gradually increases from the straight cylinder section to the conical cylinder section.

[0009] Preferably, adjustment plates are mounted on both ends of the mounting shaft, and the two adjustment plates are located between the ends of the limiting sliding sleeve and the corresponding connecting plates.

[0010] Preferably, the installation shaft passes through one of the connecting plates and has one end portion provided with a slot and a locking plate engaged with the slot, the locking plate is connected to the connecting plate, and the installation shaft passes through another connecting plate and has one end portion provided with a stopper, the stopper abuts against the connecting plate.

[0011] Preferably, the suspension shaft is an integrally formed structure, comprising a cylindrical section located in the middle, and two reducing sections respectively connecting the two ends of the cylindrical section and the two ends of the suspension shaft, the outer diameter of the reducing section gradually decreases in the direction approaching the cylindrical section, and the outer diameter of the cylindrical section is equal to the minimum outer diameter of the reducing section.

[0012] Preferably, a predetermined gap is formed between the suspension shaft and the second connecting arm, the length of the connecting plate is greater than or equal to the length of the second connecting arm, and the connecting plate is connected to the second connecting arm.

[0013] Preferably, the connecting plate extends toward the second connecting arm and covers the side surface of the second connecting arm, the side surface of the base, and the side surface of the first connecting arm, and the connecting plate is connected to the base and the first connecting arm.

[0014] Preferably, the first connecting arm, the second connecting arm and the base are all hollow.

[0015] Preferably, a rubber plate is provided on one side wall of the first connecting arm close to the second connecting arm.

[0016] Compared with the prior art, the beneficial effects of the utility model are:

[0017] Two connecting plates are arranged at intervals on the top of the hook body and the second connecting arm, and the two connecting plates are installed with a suspension shaft, and the outer diameters of the two ends of the suspension shaft are larger than the outer diameter of the middle of the suspension shaft. During lifting, the sling of the lifting equipment is hooked to the middle of the suspension shaft, and the first connecting arm is hooked to the inner wall of the through hole of the hollow prefabricated component. Since the outer diameters of the two ends of the suspension shaft are larger than the outer diameter of the middle of the suspension shaft, the sling is restricted from sliding horizontally on the suspension shaft during lifting, so that the force points of the sling and the first connecting arm are roughly on the same vertical line, which is conducive to avoiding the tilting, shaking and even overturning and falling of the prefabricated component during the lifting process, and improving the safety and reliability of the lifting process. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of a hook for lifting a hollow prefabricated component according to an embodiment of the utility model;

[0019] Figure 2 for Figure 1 Side view of

[0020] Figure 3 for Figure 2 Cross-sectional view along AA direction;

[0021] Figure 4 It is a three-dimensional structural schematic diagram of the suspension shaft of an embodiment of the utility model;

[0022] Figure 5 A cross-sectional view of a suspension shaft according to an embodiment of the utility model;

[0023] Figure 6 It is a cross-sectional view of another suspension shaft according to an embodiment of the utility model.

[0024] In the figure: hook body 1; base 11; first connecting arm 12; rubber plate 121; second connecting arm 13; accommodating groove 14; connecting plate 15; hanging shaft 2; cylindrical section 2a; reducing section 2b; end 2c; mounting shaft 21; slot 211; locking plate 212; stopper 213; bolt 214; limiting sleeve 22; straight section 221; conical section 222; adjusting plate 23. DETAILED DESCRIPTION

[0025] In order to enable those skilled in the art to better understand the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0026] In this article, the terms "upper, lower, inside, outside" and the like are established based on the positional relationships shown in the drawings. The corresponding positional relationships may also change depending on the drawings, and therefore cannot be understood as absolute limitations on the scope of protection; moreover, relational terms such as "first" and "second" and the like are merely used to distinguish one component from another with the same name, and do not necessarily require or imply any actual relationship or order between these components.

[0027] like Figure 1-6As shown, the utility model provides a hook for lifting hollow prefabricated components, including a hook body 1, the hook body 1 includes a side groove 14 formed by sequentially connecting a first connecting arm 12, a base 11 and a second connecting arm 13 for at least partially accommodating the hollow prefabricated component, the hook body 1 is provided with two connecting plates 15 spaced apart at the top of the second connecting arm 13, the two connecting plates 15 are installed with a hanging shaft 2, and the outer diameters of the two ends of the hanging shaft 2 are larger than the outer diameter of the middle part of the hanging shaft 2. The hollow prefabricated component can be a prefabricated concrete pile with a hollow interior, or a steel pipe pile, or a steel sheet pile, or a floor slab, or a wall, or a beam, or a column, etc. The hollow prefabricated component has a through hole axially penetrating both ends of the pile body. During lifting, there is a hook at each end of the hollow prefabricated component, and the first connecting arms 12 of the two hooks extend into the two ends of the through hole respectively. The first connecting arm 12 hooks the inner wall of the through hole of the hollow prefabricated component, and hooks the sling of the lifting equipment to the middle part of the lifting shaft 2. The outer diameters at both ends of the lifting shaft 2 are larger than the outer diameter of the middle part of the lifting shaft 2, which limits the lateral sliding of the sling on the lifting shaft 2 during lifting, and prevents the sling from detaching from the middle part of the lifting shaft 2, so that the force points of the sling and the first connecting arm 12 are roughly on the same vertical line, which is conducive to avoiding the situation where the prefabricated components are tilted, shaken, or even overturned and fall off during the lifting process, thereby improving the safety and reliability of the lifting process.

[0028] The hook of the utility model can also be used for lifting grooved sheet piles. During lifting, the first connecting arm hooks the groove wall of the grooved sheet pile. The cross section of the grooved sheet pile can be C-shaped, H-shaped, V-shaped, I-shaped, etc.

[0029] The number of the hanging shafts 2 can be one or more than two. The specific number of the hanging shafts 2 is selected according to the lifting requirements and is not limited here.

[0030] like Figure 1-2 As shown in 4-5, specifically, the suspension shaft 2 includes a mounting shaft 21 passing through two connecting plates 15, and a limiting sleeve 22 axially sleeved on the mounting shaft 21. The limiting sleeve 22 is located between the two connecting plates 15, and the outer diameters of the two ends of the limiting sleeve 22 are greater than the outer diameter of the middle part of the limiting sleeve 22. During lifting, the lifting rope of the lifting equipment hooks the middle part of the limiting sleeve 22. When the angle of the lifting rope needs to be changed, the limiting sleeve 22 can rotate around the mounting shaft 21 to meet the angle change of the lifting rope during the lifting process, so that the lifting process is smoother. Preferably, the limiting sleeve 22 includes a straight tube section 221 located in the middle and a conical tube section 222 connected to both ends of the straight tube section 221. The outer diameter of the conical tube section 222 gradually increases from the straight tube section 221 to the conical tube section 222. During lifting, the lifting rope of the lifting equipment hooks the straight tube section 221, and the conical tube section 222 can limit the lifting rope from being separated from the straight tube section 221. In other embodiments, the tapered cylinder section 222 may be replaced by a large diameter section having an outer diameter greater than that of the straight cylinder section 221 , wherein the large diameter section may be a constant diameter section, or a variable diameter section having a shape different from that of the tapered cylinder section 222 , as long as the sling can be prevented from detaching from the straight cylinder section 221 .

[0031] like Figure 1-2 As shown, for the convenience of description, the length direction of the first connecting arm 12 is defined as the X direction, and the height direction of the hook body 1 (i.e. Figure 2 The vertical direction shown in FIG. 1 is the Z direction, and the width direction of the first connecting arm 12 is the Y direction (i.e. Figure 2 In the transverse (lateral) direction shown in the figure, preferably, the center line of the straight tube section 221 in the Z direction coincides with the projection of the center line of the first connecting arm 12 in the Z direction along the X direction.

[0032] like Figure 1-2 As shown, preferably, adjustment plates 23 are mounted on both ends of the installation shaft 21, and the two adjustment plates 23 are located between the ends of the limiting sleeve 22 and the corresponding connecting plates 15. When the axial dimension of the limiting sleeve 22 is smaller than the distance between the two connecting plates 15, the setting of the adjustment plates 23 can facilitate the adjustment of the position of the limiting sleeve 22 on the installation shaft 21, so that the straight section 221 of the limiting sleeve 22 is located in the middle of the installation shaft 21. When the axial dimension of the limiting sleeve 22 is equal to the distance between the two connecting plates 15 and the middle of the limiting sleeve 22 is located in the middle of the installation shaft 21, the two tapered sections 222 of the limiting sleeve 22 abut against the two connecting plates 15, and the adjustment plates 23 may not be required.

[0033] like Figure 1-2 As shown in Figures 4-5, preferably, in this embodiment, the end of the installation shaft 21 passing through one of the connection plates 15 is provided with a slot 211 and a locking plate 212 engaged with the slot 211, the locking plate 212 is connected to the connection plate 15, and the end of the installation shaft 21 passing through the other connection plate 15 is provided with a stopper 213, and the stopper 213 abuts against the connection plate 15. During assembly, after the end of the installation shaft 21 provided with the slot 211 passes through one of the connection plates 15, one of the adjustment plates 23, the limiting sleeve 22, the other adjustment plate 23, and the other connection plate 15, the stopper 213 abuts against one of the connection plates 15, and the installation shaft 21 is fixedly connected to the other connection plate 15 through the locking plate 212, and the locking plate 212 and the connection plate 15 can be connected by bolts 214. In other embodiments, both ends of the installation shaft 21 are provided with a card slot 211, and the two ends of the installation shaft 21 are fixed to the corresponding connecting plate 15 by means of a locking plate 212 that is engaged with the card slot 211. Of course, the installation shaft 21 can also be assembled and fixed to the connecting plate 15 by other methods other than the above, and the specific connection method is not limited. For the convenience of assembly, the connecting plate 15 can be connected and fixed to the second connecting arm 13 before installing the hanging shaft 2, and the installation shaft 21 can be fixedly connected to the connecting plate 15 after passing through the connecting plate 15, or the connecting plate 15 can be installed on the end of the installation shaft 21, and then the connecting plate 15 can be connected and fixed to the second connecting arm 13. The specific method to be adopted is selected according to the actual assembly needs and is not limited here.

[0034] like Figure 6 As shown, preferably, in another embodiment, the suspension shaft 2 is an integrally formed structure, that is, the mounting shaft 21 and the limiting sleeve 22 are integrally formed. The suspension shaft 2 includes a cylindrical section 2a located in the middle, and two reducing sections 2b respectively connecting the two ends of the cylindrical section 2a and the two end sections 2c of the suspension shaft 2. The outer diameter of the reducing section 2b gradually decreases in the direction close to the cylindrical section 2a, and the outer diameter of the cylindrical section 2a is equal to the minimum outer diameter of the reducing section 2b. The two end sections 2c are respectively provided with a card slot 211, and the two ends of the suspension shaft 2 are fixed to the corresponding connecting plate 15 by a locking plate 212 that is engaged with the card slot 211. When lifting, the sling hooks the cylindrical section 2a, and the reducing section 2b is used to limit the sling from being separated from the cylindrical section 2a. When assembling the suspension shaft 2, firstly, the two connecting plates 15 are mounted on the two end portions 2c, the connecting plates 15 are pressed against the reducing section 2b, and then the connecting plates 15 are connected and fixed to the second connecting arm 13, and the two ends of the suspension shaft 2 are fixed to the corresponding connecting plates 15 by the locking plate 212 and the bolt 214. The connection method of the connecting plate 15 and the second connecting arm 13 includes welding, screw connection, or clamping, etc. In other embodiments, of course, the two end portions 2c of the suspension shaft 2 can also be assembled and fixed to the connecting plates 15 by other methods other than the above, and the specific connection method is not limited.

[0035] Preferably, when the total axial length of the cylindrical section 2a and the two diameter-reducing sections 2b is less than the distance between the two connecting plates 15, in order to make the cylindrical section 2a located in the middle of the two connecting plates 15, an adjustment plate 23 with a suitable axial length can be mounted on the end 2c, and the adjustment plate 23 abuts between the diameter-reducing section 2b and the connecting plate 15. For details, refer to Figure 2 Preferably, the center line of the cylindrical segment 2a in the Z direction coincides with the projection of the center line of the first connecting arm 12 in the Z direction along the X direction.

[0036] like Figure 1-3 As shown, a predetermined gap is formed between the suspension shaft 2 and the second connecting arm 13, which facilitates the connection of the sling to the middle of the suspension shaft 2. The length of the connecting plate 15 is greater than or equal to the length of the second connecting arm 13. The connecting plate 15 is connected to the second connecting arm 13, which is beneficial to improving the structural strength of the hook as a whole. Further, the connecting plate 15 extends toward the direction of the second connecting arm 13 and covers the side of the second connecting arm 13, the side of the base 11, and the side of the first connecting arm 12. The connecting plate 15 is connected to the base 11 and the first connecting arm 12, further improving the overall force performance of the hook. In other embodiments, the connecting plate 15 can be connected only to the second connecting arm 13.

[0037] like Figure 3As shown, the first connecting arm 12, the second connecting arm 13 and the base 11 are all hollow inside. Of course, the first connecting arm 12, the second connecting arm 13 and the base 11 can also be solid structures. In addition, the first connecting arm 12, the second connecting arm 13 and the base 11 can be integrally formed, or the three can be connected as a whole through later assembly.

[0038] like Figure 1 As shown, preferably, a rubber plate 121 is provided on one side wall of the first connecting arm 12 close to the second connecting arm 13. The rubber plate 121 is provided to protect the inner wall of the through hole of the hollow prefabricated component from being damaged by the hook body 1, and can increase the friction between the hook body 1 and the inner wall of the through hole, thereby preventing the first connecting arm 12 from slipping out of the through hole of the hollow prefabricated component.

[0039] The above is a detailed introduction to the lifting hook for the hollow prefabricated component provided by the utility model. This article uses specific examples to illustrate the principle and implementation method of the utility model. The description of the above embodiment is only used to help understand the core idea of ​​the utility model. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the utility model, the utility model can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the claims of the utility model.

Claims

1. A hook for lifting hollow prefabricated components, characterized in that: include: The hook body includes a side groove formed by sequentially connecting a first connecting arm, a base and a second connecting arm for at least partially accommodating a hollow prefabricated component, the hook body is provided with two connecting plates spaced apart at the top of the second connecting arm, and the two connecting plates are provided with hanging shafts, and the outer diameters at both ends of the hanging shafts are larger than the outer diameter of the middle part of the hanging shafts.

2. The hook for lifting hollow prefabricated components according to claim 1, characterized in that: The suspension shaft includes a mounting shaft passing through the two connecting plates and a limiting sleeve axially mounted on the mounting shaft. The limiting sleeve is located between the two connecting plates, and the outer diameters of the two ends of the limiting sleeve are larger than the outer diameter of the middle portion of the limiting sleeve.

3. The hook for lifting hollow prefabricated components according to claim 2, characterized in that: The limiting sliding sleeve comprises a straight cylinder section located in the middle and a conical cylinder section connected to both ends of the straight cylinder section, and the outer diameter of the conical cylinder section gradually increases from the straight cylinder section to the conical cylinder section.

4. The hook for lifting hollow prefabricated components according to claim 2 or 3, characterized in that: Adjustment plates are sleeved on both ends of the installation shaft, and the two adjustment plates are located between the ends of the limiting sliding sleeve and the corresponding connecting plates.

5. The hook for lifting hollow prefabricated components according to claim 2 or 3, characterized in that: The installation shaft passes through one of the connecting plates and has one end portion provided with a slot and a locking plate engaged with the slot, the locking plate is connected to the connecting plate, and the installation shaft passes through another connecting plate and has one end portion provided with a stopper, the stopper abuts against the connecting plate.

6. The hook for lifting hollow prefabricated components according to claim 1, characterized in that: The suspension shaft is an integrally formed structure, comprising a cylindrical section in the middle, and two diameter-reducing sections respectively connecting the two ends of the cylindrical section and the two ends of the suspension shaft, wherein the outer diameter of the diameter-reducing section gradually decreases in the direction approaching the cylindrical section, and the outer diameter of the cylindrical section is equal to the minimum outer diameter of the diameter-reducing section.

7. The hook for lifting hollow prefabricated components according to claim 1, characterized in that: A predetermined gap is formed between the suspension shaft and the second connecting arm, the length of the connecting plate is greater than or equal to the length of the second connecting arm, and the connecting plate is connected to the second connecting arm.

8. The hook for lifting hollow prefabricated components according to claim 1, characterized in that: The connecting plate extends toward the second connecting arm and covers the side surface of the second connecting arm, the side surface of the base, and the side surface of the first connecting arm. The connecting plate is connected to the base and the first connecting arm.

9. The hook for lifting hollow prefabricated components according to claim 1, characterized in that: The first connecting arm, the second connecting arm and the base are all hollow inside.

10. The hook for lifting hollow prefabricated components according to claim 1, characterized in that: A rubber plate is provided on a side wall of the first connecting arm close to the second connecting arm.

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