Anti-drop device for drill rod breakage of long spiral drilling pile machine

Abstract

The present invention discloses a device for preventing the drill rod of a long spiral pile driver from breaking. The device comprises a pile driver power head and a drill rod disposed below the pile driver power head. The drill rod and the pile driver power head are connected by a flange. The top and bottom pipe walls of the drill rod are symmetrically provided with through holes. Two steel pipes are symmetrically disposed within the drill rod, with their ends located at the through holes in the drill rod pipe wall. Two steel wire ropes are respectively passed through the two steel pipes. Bolts are inserted through the through holes in the pipe wall at the bottom of the drill rod, and nuts are used to fasten the two steel pipes and the bottom ends of the two steel wire ropes. Two rope tighteners are symmetrically disposed on the outer wall of the top of the drill rod and located at the through holes at the top of the drill rod. The tongues of the rope tighteners are disposed on the flange directly above the rope tighteners. The top ends of the two steel wire ropes pass through the through holes in the pipe wall at the top of the drill rod and are wound around the rope tighteners. The device ensures that the drill rod can be extracted even if it breaks at any position, preventing the broken portion from falling to the bottom of the hole and causing the pile hole to be scrapped. This saves material and manpower resources and improves construction efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of construction engineering, in particular to a device for preventing a drill rod of a long spiral drilling pile machine from breaking and falling off. Background Art

[0002] Long spiral bored and cast-in-place piles are widely used in the design and construction of engineering piles. They are suitable for fill layers, silt layers, sand layers and gravel layers. They are also suitable for various soil layers with groundwater and can be piled in adverse geological conditions such as soft soil layers and quicksand layers.

[0003] During the actual drilling construction process, if there are underground boulders or extremely hard geological structures, it is easy for the spiral drilling pile driver to get stuck during construction, causing the drill rod to suffer brittle damage and break directly. The broken drill rod falls to the bottom of the hole and cannot be removed, resulting in frequent pile construction, which seriously affects the construction efficiency and increases material and labor costs. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a device for preventing the drill rod of a long spiral drilling pile driver from falling off. The device ensures that the drill rod can be extracted if it breaks at any part, preventing the broken part from falling to the bottom of the hole and causing the pile hole to be scrapped, saving material and manpower and improving construction efficiency.

[0005] The jack-up plan of the present invention is a kind of jack-up plan that can realize the lifting of the lifting of the lifting power, and the lifting of the lifting power is improved.

[0006] Furthermore, the length of the steel wire rope is 1.5 times the length of the drill rod, and a steel wire rope drum longer than the length of the drill rod is hung on the rope tightener.

[0007] Furthermore, the top ends of the two steel pipes are located lower than the through hole in the top end wall of the drill rod.

[0008] The present invention utilizes the aforementioned technical solution to prevent the drill rod of a long spiral pile driver from falling off. The device comprises a pile driver power head and a drill rod disposed below the pile driver power head. The drill rod and the pile driver power head are connected by a flange. The top and bottom pipe walls of the drill rod are symmetrically provided with through holes. Two steel pipes are symmetrically disposed within the drill rod, with their ends located at the through holes in the drill rod pipe wall. Two steel wire ropes are respectively passed through the two steel pipes. Bolts are inserted through the through holes in the bottom pipe wall of the drill rod, and nuts are used to fasten the two steel pipes and the bottom ends of the two steel wire ropes. Two rope tighteners are symmetrically disposed on the outer wall of the top of the drill rod and located at the through holes in the top of the drill rod. The rope tightener tabs are disposed on flanges directly above the rope tighteners. The top ends of the two steel wire ropes pass through the through holes in the top pipe wall of the drill rod and are wound around the rope tighteners. This device ensures that any broken portion of the drill rod can be retrieved, preventing the broken portion from falling to the bottom of the hole and causing the pile hole to be scrapped. This saves material and manpower resources and improves construction efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments:

[0010] Figure 1 Schematic diagram of the structure of the anti-falling device for the breakage of the drill rod of a long spiral drilling pile driver according to the present invention;

[0011] Figure 2 This is an enlarged schematic cross-sectional view of the drill pipe in this device. DETAILED DESCRIPTION

[0012] Implementation example Figure 1 and Figure 2 As shown, the present invention is a device for preventing the drill rod of a long spiral drilling pile driver from falling off when broken, comprising a pile driver power head 1 and a drill rod 2 arranged below the pile driver power head 1, wherein the drill rod 2 is connected to the pile driver power head 1 by a flange 3, and further comprising two steel pipes 4, two steel wire ropes 5 and two rope tighteners 6, wherein the top and bottom pipe walls of the drill rod 2 are symmetrically provided with through holes, the two steel pipes 4 are symmetrically arranged in the drill rod 2 and the two ends are respectively located at the through hole positions of the pipe wall of the drill rod 2, The two steel wire ropes 5 are respectively inserted into the two steel pipes 4. After the through hole in the pipe wall at the bottom end of the drill rod 2 is penetrated by a bolt 7, the two steel pipes 4 and the bottom ends of the two steel wire ropes 5 are fastened by nuts. The two rope tighteners 6 are symmetrically arranged on the outer wall of the top end of the drill rod 2 and are located at the through hole position at the top end of the drill rod 2. The tongue 61 of the rope tightener 6 is arranged on the flange 3 directly above the rope tightener 6. The top ends of the two steel wire ropes 5 pass through the through hole in the pipe wall at the top end of the drill rod 2 and are wound around the rope tightener 6.

[0013] Preferably, the length of the steel wire rope 5 is 1.5 times the length of the drill rod 2, and the steel wire rope 5, which is longer than the drill rod 2, is wound on the rope tensioner. Since the drill rod is composed of multiple rod sections connected by flanges, the steel wire rope having a length greater than the drill rod facilitates expansion and contraction during the replacement of a rod section, providing sufficient expansion space during the replacement process and reducing the workload of secondary wire rope drilling.

[0014] Preferably, the top ends of the two steel pipes 4 are lower than the through hole in the top wall of the drill rod 2, so that the steel wire rope drawn out from the top ends of the steel pipes can pass through the through hole.

[0015] The steel pipe in this device is galvanized steel pipe, which prevents the wire rope from wearing out as the drill rod rotates inside the drill rod, and avoids the wire rope from being attached to the concrete slurry for a long time, which may increase its own weight or easily cause pipe blockage. When the drill rod breaks, the broken part will not fall to the bottom of the hole due to the pulling of the wire rope. When the drill rod is lifted to the ground, a worker climbs to the pile driver's power head and pushes out the tongue of the rope tightener. The wire rope naturally loosens under the action of the weight of the broken drill rod and drill bit. The broken drill rod and drill bit are unloaded to the ground. The broken part of the rod body can then be removed from the flange connection and replaced with a new one. Before replacing the new rod body, the wire rope is first connected through holes, and then the rod body is connected through the flange. After the drill rod is connected, the worker climbs to the pile driver's power head and shakes the rope tightener to tighten the wire rope, ensuring that the wire rope is in a critical stress state and is properly tensioned.

[0016] This device prevents pile holes from being scrapped due to broken rods falling, eliminating the need for new piles. This saves time, effort, and construction time. The broken rod can be extracted and re-welded for reuse. This device has a simple structure, is inexpensive to manufacture, and is reusable, reducing material costs. It is suitable for drill rods of any length and diameter. Even if the wire rope breaks, it remains inside the drill rod, preventing damage to personnel or equipment. Furthermore, this device is easy to install and disassemble, allowing the pile driver crew to perform the installation themselves without affecting the drilling and concrete pouring operations.

Claims

1. A device for preventing a drill rod of a long spiral pile driver from breaking and falling, comprising a pile driver power head and a drill rod disposed below the pile driver power head, wherein the drill rod and the pile driver power head are connected by a flange, characterized in that: It also includes two steel pipes, two steel wire ropes and two rope tighteners. The top and bottom pipe walls of the drill rod are symmetrically provided with through holes. The two steel pipes are symmetrically arranged in the drill rod and the two ends are respectively located at the through holes in the pipe wall of the drill rod. The two steel wire ropes are respectively inserted into the two steel pipes. After the through holes in the pipe wall of the bottom end of the drill rod are inserted into bolts, the two steel pipes and the bottom ends of the two steel wire ropes are fastened by nuts. The two rope tighteners are symmetrically arranged on the outer wall of the top end of the drill rod and are located at the through holes in the top end of the drill rod. The tongue of the rope tightener is arranged on the flange directly above the rope tightener. The top ends of the two steel wire ropes pass through the through holes in the pipe wall of the top end of the drill rod and are wound around the rope tightener.

2. The anti-drop device for the breakage of the drill rod of a long spiral pile drilling machine according to claim 1, characterized in that: The length of the steel wire rope is 1.5 times the length of the drill rod, and the steel wire rope drum which is longer than the length of the drill rod is hung on the rope tightener.

3. The anti-drop device for preventing the breakage of the drill rod of a long spiral pile drilling machine according to claim 1 or 2, characterized in that: The top ends of the two steel pipes are located lower than the through hole in the top end wall of the drill rod.

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