A hollow pile gripper and a gripper system

Abstract

The present invention discloses a hollow pile gripper and a gripper system, which includes a gripper mounting seat and a hook assembly arranged in the gripper mounting seat, and further includes a traction rope and a force applying device for winding and unwinding the traction rope and applying a certain pulling force to the traction rope during the process of winding and unwinding the traction rope; one end of the traction rope is wound around the force applying device, and the other end forms a free end; there are two groups of force applying devices, the two groups of force applying devices are fixed on the top plate of the gripper mounting seat, and the two groups of force applying devices are located on both sides of the center line of the top plate; the free ends of the two groups of traction ropes are connected to each other to form a pulling force action point. When a pulling force is applied at the pulling force action point, the pulling force action point is located on the central plane in the width direction of the hollow pile gripper. The hollow pile gripper disclosed by the present invention can effectively inhibit rotation and ensure the smooth operation of the gripper.

Description

Technical Field

[0001] The present invention relates to the technical field of hollow pile grippers. Background Art

[0002] Hollow piles are widely used in engineering construction. However, due to their large volume and heavy weight, when hoisting and transporting hollow piles, a crane needs to hook them through a hollow pile gripper and then carry them. Existing hollow pile grippers have the following problems: when the crane drives the hollow pile gripper to move, the hollow pile gripper is prone to rotation. The rotation of the gripper will cause unstable hoisting and is likely to cause accidents. When using the gripper to hook a hollow pile, the rotation of the gripper will make it difficult to hook the hollow pile. Summary of the Invention

[0003] The present invention provides a hollow pile gripper, which solves the problem of rotation of the existing hollow pile gripper.

[0004] The technical means adopted by the present invention are as follows:

[0005] A hollow pile gripper includes a gripper mounting base and a hook assembly disposed in the gripper mounting base, and further includes a towing rope and a force applying device for taking in and paying out the towing rope and applying a certain pulling force to the towing rope during the process of taking in and paying out the towing rope;

[0006] One end of the towing rope is wound around the force applying device, and the other end forms a free end;

[0007] There are two groups of the force applying devices. The two groups of force applying devices are fixed on the top plate of the gripper mounting base, and the two groups of force applying devices are located on both sides of the midline in the width direction of the top plate;

[0008] The free ends of the two groups of towing ropes are connected to each other to form a pulling force application point. When a pulling force is applied to the pulling force application point, the pulling force application point is located in a plane passing through the midline in the width direction of the hollow pile gripper and perpendicular to the top plate.

[0009] Further, the speed of taking in and paying out the towing rope by the two groups of force applying devices is the same, so that when taking in and paying out the towing rope, the pulling force application point moves on the midline in the width direction of the hollow pile gripper and in a plane perpendicular to the top plate.

[0010] Further, the force applying device includes a fixed seat, a fixed shaft, a reel assembly and a volute spring. The reel assembly is installed on the fixed seat through the fixed shaft. A volute spring accommodation space is provided in the reel assembly. The volute spring is placed in the volute spring accommodation space, and the inner ring of the volute spring is fixedly connected to the fixed shaft, and the outer ring of the volute spring is fixedly connected to the reel assembly. One end of the towing rope is wound around the reel assembly.

[0011] Further, a wiring disc is also fixed on the gripper mounting seat. The free end of the towing rope passes through the wiring disc and is connected to form a pulling force application point. A guiding cap is fixed at the extending point of the towing rope on the wiring disc. The guiding cap is provided with a guiding hole, and the towing rope passes through the guiding hole. The guiding hole is provided with a guiding surface.

[0012] A hollow pile gripper system includes a connecting rope and two groups of the hollow pile grippers disclosed in the present invention. The two groups of hollow pile grippers are installed on a traveling crane, and two ends of the connecting rope are respectively connected to the pulling force application points of the two groups of hollow pile grippers.

[0013] Compared with the prior art, the hollow pile gripper disclosed in the present invention has the following advantages. Since a towing rope and two groups of force applying devices are arranged on the gripper, the towing rope is wound around the force applying devices and the free ends are connected to each other to form a pulling force application point. The force applying devices can realize the retracting and releasing of the towing rope, and when the towing rope is retracted and released, a certain pulling force is applied to the towing rope. When a pulling force is applied to the pulling force application point, the towing rope can apply a certain acting force to the hollow pile gripper, which can effectively inhibit the rotation of the hollow pile gripper. Description of the Drawings

[0014] Figure 1 The front view of the hollow pile gripper disclosed in Embodiment 1 of the present invention;

[0015] Figure 2 The side view of the hollow pile gripper;

[0016] Figure 3 The structural diagram of the force applying device;

[0017] Figure 4 For Figure 3 The sectional view taken along the line M-M in

[0018] Figure 5a The structural diagram of the fixed seat;

[0019] Figure 5b For Figure 5a The left view of

[0020] Figure 6a The structural diagram of the locking plate;

[0021] Figure 6b The structural diagram of the fixed shaft;

[0022] Figure 7 The structural diagram of two groups of hollow pile grippers disclosed in the present invention connected by a connecting rope;

[0023] Figure 8 The structural diagram of the hollow pile gripper with a wiring disc;

[0024] Figure 9Structural diagram of the guiding cap.

[0025] In the figure: 1. Grabbing tool mounting seat, 10. Top plate, 2. Hook assembly, 3. Force applying device, 30. Fixed seat, 300. Fixed bottom plate, 301. Support plate, 302. First groove, 31. Fixed shaft, 310. Card slot, 32. Reel assembly, 320. End plate, 321. Reel, 322. Volute spring accommodation space, 34. Locking plate, 340. Locking hole, 4. Fixed pulley set, 5. Wiring panel, 50. Guiding cap, 51. Guiding hole, 52. Guiding surface, 6. Towing rope, 7. Connecting rope. Detailed implementation mode

[0026] As Figure 1 and Figure 2 shown, the hollow pile grabbing tool disclosed by the present invention includes a grabbing tool mounting seat 1 and a hook assembly 2 arranged in the grabbing tool mounting seat 1. The hook assembly 2 can drive the hook to hook the hollow pile. In this embodiment, a fixed pulley set 4 is installed on the top plate 10 of the grabbing tool mounting seat 1. The fixed pulley set 4 is connected to a traveling crane, and the traveling crane can drive the hollow pile grabbing tool to move through the fixed pulley set. The hollow pile grabbing tool disclosed by the present invention further includes a towing rope 6 and a force applying device 3 for taking in and paying out the towing rope and applying a certain pulling force to the towing rope during the process of taking in and paying out the towing rope;

[0027] One end of the towing rope 6 is wound on the force applying device, and the other end forms a free end;

[0028] There are two groups of the force applying devices 3. The two groups of the force applying devices 3 are fixed on the top plate 10 of the grabbing tool mounting seat 1, and the two groups of the force applying devices 3 are located on both sides of the midline in the width direction of the top plate 10 of the hollow pile grabbing tool; The width direction of the hollow pile grabbing tool refers to the direction parallel to the top plate of the hollow pile grabbing tool when looking at the hollow pile grabbing tool from the side where the hook is provided (i.e., Figure 1 the direction shown by N-N in the figure). In the present invention, the two groups of force applying devices are respectively located on both sides of the fixed pulley set. The free ends of the two groups of towing ropes are connected to form a pulling force action point. When a pulling force is applied to the pulling force action point, the pulling force action point is located in the plane passing through the midline in the width direction of the hollow pile grabbing tool and perpendicular to the top plate 10, that is, Figure 1 the plane shown by A-A in the figure.

[0029] Specifically, as Figure 3 and Figure 4 shown, in the present invention, the force applying device 3 includes a fixed seat 30, a fixed shaft 31, a reel assembly 32 and a volute spring (not shown in the figure). As Figure 5a and Figure 5bAs shown, the fixing base 30 includes a fixing base plate 300 and two oppositely arranged support plates 301 fixed on the fixing base plate 300. The fixing base plate 300 is fixedly connected to the top plate at the upper end of the gripper mounting seat 1. A fixing shaft 31 is fixed on the support plate 301. In this embodiment, a first groove 302 is provided at the upper end of the support plate 301. As Figure 6b shown, clamping grooves 310 are provided at both ends of the fixing shaft 31. Both ends of the fixing shaft 31 can be placed in the first grooves 302 of the two support plates 301, and the clamping grooves 310 can be clamped on the bottom edges of the first grooves 302. The length of the fixing shaft 31 is greater than the distance between the two support plates 301, so that both ends of the fixing shaft extend outwards from the first grooves 302 by a certain length. Locking plates 34 are provided on the outer sides of the two support plates 301. Locking holes 340 are provided on the locking plates 34. The locking plates 34 are fixed on the outer sides of the support plates 301 by bolts, and the ends of the fixing shaft 31 are clamped into the locking holes 340. The reel assembly 32 includes two oppositely arranged end plates 320 and a reel 321 arranged between the two end plates 320. The end plates 320 are arranged on the fixing shaft 31 so that the reel assembly 32 can rotate on the fixing shaft 31. A torsion spring accommodating space 322 is formed by the two end plates and the reel. The torsion spring is placed in the torsion spring accommodating space 322. The inner ring of the torsion spring is fixedly connected to the fixing shaft, and the outer ring of the torsion spring is fixedly connected to the inner wall of the reel. An anti-rotation towing rope is wound around the outer side of the reel.

[0030] As Figure 7 shown is a hollow pile gripper system with the hollow pile gripper disclosed in the present invention. This system includes two groups of the hollow pile grippers disclosed in the present invention. The two groups of hollow pile grippers are respectively installed at both ends of a traveling crane (the traveling crane is not shown). The free ends of the towing ropes 6 of the two groups of grippers are connected to form a pulling force application point ( Figure 7 point D in the figure), which are respectively connected to both ends of the connecting rope 7. Preferably, both the towing rope and the connecting rope are made of steel wire ropes. The traveling crane can drive the two groups of hollow pile grippers to approach or move away from each other. When the traveling crane drives the two groups of hollow pile grippers to move away (in the direction shown by E-E in the figure), the two groups of hollow pile grippers apply a pulling force acting on each other through the connecting rope, thereby pulling the towing rope to elongate (the wire releasing function of the force applying device). The positions ( Figure 7 points B and C in the figure) where the two towing ropes on each hollow pile gripper act on the gripper mounting seat and the pulling force application point of the towing rope ( Figure 7The point D in [the figure] forms an isosceles triangle structure, that is, the length of BD in the figure is equal to the length of CD. The two traction ropes and the connecting rope form a Y-shaped structure. The connecting rope is located on the central plane (A-A) in the width direction of the hollow pile gripper. During the process of the two groups of hollow pile grippers moving away from or approaching each other, the wire winding and unwinding speeds of the force application device are the same, so that the pulling force application point is always located on the center line of the hollow pile gripper. Due to the elongation of the traction rope, the reel assembly rotates, which in turn causes the scroll spring to deform. The restoring force of the scroll spring makes the traction rope have a relatively constant pulling force F. The two groups of traction ropes apply the pulling force F from both sides of the center in the width direction of the hollow pile gripper, thereby effectively suppressing the rotation of the hollow pile gripper. In the present invention, due to the adoption of the scroll spring, the traction rope can be wound and unwound within a certain length range. In the present invention, the maximum telescopic length of the scroll spring can be 15 meters, and the traction rope can also be elongated by a maximum of 15 meters under the action of the scroll spring, and the force acting on the traction rope is relatively constant, so that the hollow pile gripper system can be applicable to hoisting hollow piles of different lengths (such as 10 meters, 15 meters, 20 meters, etc.), and can effectively suppress the rotation of the hollow pile gripper. Even after the hollow pile gripper rotates to a certain extent under the action of a large external force, it can quickly return to the normal working state. When the crane drives the two hollow pile grippers to approach each other, the restoring force of the scroll spring drives the reel assembly to rotate, thereby realizing the wire winding of the traction rope. At the same time, during the wire winding process, the traction rope still has a relatively constant pulling force, which suppresses the rotation of the hollow pile gripper.

[0031] Furthermore, as Figure 8 and Figure 9 shown, a wiring disc 5 is further fixed on the gripper mounting seat. The free end of the traction rope passes through the wiring disc and is connected to form a pulling force application point. A guide cap 50 is fixed at the point where the traction rope extends out on the wiring disc. A guide hole 51 is provided on the guide cap 50. The traction rope passes through the guide hole 51. The inner side wall of the guide hole 51 is a guide surface 52. In this embodiment, when cut along the axis of the guide cap, the cross-sectional shape of the guide surface is arc-shaped, and the guide surface can effectively reduce the wear on the traction rope.

[0032] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A hollow pile gripper, comprising a gripper mounting base (1) and a hook assembly (2) disposed in the gripper mounting base (1), characterized in that: It further includes a towing rope (6) and a force - applying device (3) for winding and unwinding the towing rope (6) and applying a certain pulling force to the towing rope (6) during the winding and unwinding process; One end of the towing rope is wound around the force - applying device, and the other end forms a free end; There are two sets of the force - applying devices (3). The two sets of the force - applying devices (3) are fixed on the top plate (10) of the grab mounting base (1), and the two sets of the force - applying devices (3) are located on both sides of the mid - line in the width direction of the top plate; The free ends of the two sets of towing ropes are connected to form a pulling - force application point. When a pulling force is applied at the pulling - force application point, the pulling - force application point is located in a plane passing through the mid - line in the width direction of the hollow - pile grab and perpendicular to the top plate; and the rotation of the hollow - pile grab can be inhibited by applying a pulling force at the pulling - force application point; The force - applying device (3) includes a fixed seat (30), a fixed shaft (31), a reel assembly (32) and a torsion spring. The reel assembly (32) is installed on the fixed seat (30) through the fixed shaft (31). A torsion - spring accommodation space (322) is provided in the reel assembly (32). The torsion spring is placed in the torsion - spring accommodation space (322), the inner ring of the torsion spring is fixedly connected to the fixed shaft (31), the outer ring of the torsion spring is fixedly connected to the reel assembly (32), and one end of the towing rope is wound around the reel assembly.

2. The hollow pile gripper according to claim 1, wherein: The two sets of force - applying devices wind and unwind the towing rope at the same speed, so that when the towing rope is wound and unwound, the pulling - force application point moves on a plane passing through the mid - line in the width direction of the hollow - pile grab and perpendicular to the top plate.

3. The hollow pile gripper according to claim 2, characterized in that: A wiring disc (5) is also fixed on the grab mounting base (1). The free end of the towing rope passes through the wiring disc and then is connected to form a pulling - force application point. A guiding cap (50) is fixed at the point where the towing rope extends out on the wiring disc (5). A guiding hole (51) is provided on the guiding cap (50). The towing rope passes through the guiding hole (51), and a guiding surface (52) is provided in the guiding hole (51).

4. A hollow pile grab system, characterized in that: It includes a connecting rope (7) and two sets of hollow - pile grabs according to any one of claims 1 to 3. The two sets of hollow - pile grabs are installed on a traveling crane, and the two ends of the connecting rope are respectively connected to the pulling - force application points of the two sets of hollow - pile grabs.

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