Slag salvaging drill bit for riprap area crossing seawall mud flat

Abstract

The utility model relates to a slag salvaging drill bit for a riprap area crossing a seawall mud flat, which comprises a reverse circulation drilling machine drill rod and a slag salvaging barrel fixed at the lower end of the reverse circulation drilling machine drill rod, the slag salvaging barrel is a hollow circular steel barrel, and a slag salvaging net covering the hollow part of the slag salvaging barrel along the radial direction is arranged at the lower end of the slag salvaging barrel. The slag salvaging net is composed of a plurality of steel wire ropes arranged in a staggered mode, one ends of the steel wire ropes are fixed to the inner wall of the slag salvaging barrel, and the other ends of the steel wire ropes are suspended. The slag salvaging drill bit of the structure can be used in cooperation with a reverse circulation drilling machine, and the reverse circulation drilling machine does not have a suction function, is light in self weight and is suitable for being used in soft-geologic mud flat areas.

Description

Technical Field

[0001] The utility model relates to the technical field of soil layer drilling devices, in particular to a slag dredging drill bit used in a riprap area of ​​a cross-sea embankment beach. Background Art

[0002] When building a cross-sea bridge, it is inevitable to cross the seawall. Because there are riprap areas on the seawall and the beach, and the beach geology is relatively soft, the mechanical equipment is easy to sink due to its heavy weight. In addition, for the seawall and beach area, it is also necessary to deal with the stones in the drilling process. In the prior art, there is a method of using a suction pump with a drill bit to deal with the stones in the drilling process, but the suction method is easy to block the drill rod. Summary of the invention

[0003] In order to solve the above problems, the utility model aims to provide a slag dredger for use in the riprap area of ​​the beach across the seawall.

[0004] A slag scoop drill bit for use in a riprap area on a cross-seawall tidal flat comprises a reverse circulation drilling rig drill rod and a slag scoop barrel fixed to the lower end of the reverse circulation drilling rig drill rod, wherein the slag scoop barrel is a hollow circular steel barrel, and a slag scoop net radially covering the hollow portion of the slag scoop barrel is provided at the lower end of the slag scoop barrel, wherein the slag scoop net is composed of a plurality of staggered steel wire ropes, wherein the length of the steel wire rope is less than the inner diameter of the slag scoop barrel, one end of the steel wire rope is fixed to the inner wall of the slag scoop barrel, and the other end of the steel wire rope is suspended in the air.

[0005] Preferably, a primary reinforcement plate is provided at the connection between the slag scoop barrel and the drill rod of the reverse circulation drilling rig, and a secondary reinforcement plate is provided on the periphery of the primary reinforcement plate, one end of the secondary reinforcement plate is fixed to the drill rod of the reverse circulation drilling rig, and the other end is fixed to the upper end of the slag scoop barrel; the fixing point of the secondary reinforcement plate and the slag scoop barrel is located outside the fixing point of the primary reinforcement plate and the slag scoop barrel.

[0006] Preferably, a threaded connection portion for connecting to the reverse circulation drilling rig is provided on the upper portion of the drill rod of the reverse circulation drilling rig.

[0007] Preferably, a lifting lug is provided at the upper end of the drill pipe of the reverse circulation drilling rig.

[0008] The slag drill bit of the above structure can be used in conjunction with a reverse circulation drill. The reverse circulation drill is not equipped with a suction function, has a light weight, and is suitable for use in tidal flats with soft geology. When in use, the reverse circulation drill rotates to drive the slag drill bit to squeeze the slag and pass through the slag net composed of a wire mesh into the slag barrel. The rigidity of the wire rope ensures that the slag in the barrel does not fall. The slag drill bit is shaken to make the slag in the slag barrel pass through the slag net and fall downward to discharge the slag. In the above structure, the slag scoop net is composed of a steel wire rope with one end fixed to the inner wall of the slag scoop barrel and the other end suspended in the air. The steel wire rope needs to have sufficient rigidity and can still be deformed. During the downward pressure of the drill bit, the soil layer and the slag provide an upward force to the steel wire rope, so that the free end of the steel wire rope is deformed upward to facilitate the entry of the slag into the slag scoop barrel; after the drill bit is lifted and separated from the soil layer, the silt falls back from the gap between the steel wire ropes, and the weight of the slag causes the free ends of the steel wire ropes to fall back downward and intertwine with each other to keep the slag in the slag scoop barrel. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 This is a schematic diagram of the structure of this application;

[0010] Figure 2 This is a schematic diagram of the slag scoop net layout;

[0011] Figure 3 Schematic diagram of a slag net holding slag in a slag barrel.

[0012] Reference numerals:

[0013] A reverse circulation drilling rig drill pipe 1, a slag scoop 2, a wire rope 21, a primary reinforcement plate 31, a secondary reinforcement plate 32, a lifting lug 4, and a threaded connection part 5. DETAILED DESCRIPTION

[0014] The embodiments of the present utility model are described in detail below.

[0015] The present embodiment relates to a slag dredger used in a riprap area of ​​a cross-seawall tidal flat, comprising a reverse circulation drilling rig drill rod 1 and a slag dredger fixed to the lower end of the reverse circulation drilling rig drill rod 1, wherein the slag dredger is a hollow circular steel barrel, and a slag dredger net 2 radially covering the hollow part of the slag dredger is provided at the lower end of the slag dredger. The slag dredger net 2 is composed of a plurality of staggered steel wire ropes 21, wherein the length of the steel wire rope 21 is less than the inner diameter of the slag dredger, and one end of the steel wire rope 21 is fixed to the inner wall of the slag dredger, and the other end of the steel wire rope 21 is suspended in the air.

[0016] The above-mentioned slag scoop drill bit can be used in conjunction with a reverse circulation drilling rig, which has a light weight and is suitable for soft-foundation tidal flats. When in use, the reverse circulation drilling rig drill rod 1 is installed on the reverse circulation drilling rig, and the reverse circulation drilling rig rotates to drive the slag scoop drill bit to squeeze the slag and enter the slag scoop barrel through the slag scoop net 2 composed of a wire mesh, and the rigidity of the wire rope 21 itself ensures that the slag of the target size in the barrel does not fall. When it is necessary to discharge the slag, the slag scoop drill bit is shaken to make the slag in the slag scoop barrel pass through the slag scoop net 2 and fall downward to discharge the slag. The above-mentioned slag scoop drill bit cooperates with the reverse circulation drilling rig to capture the slag through mechanical rotation and squeezing, without the need for a suction device, and there is no risk of clogging the drill rod. In a preferred embodiment, in order to facilitate fixation with the reverse circulation drilling rig, a threaded connection part 5 for connecting with the reverse circulation drilling rig is provided on the upper part of the reverse circulation drilling rig drill rod 1.

[0017] Preferably, in order to facilitate shaking the slag drill bit to discharge the slag in the slag tube, a lifting lug 4 is provided on the upper end of the drill rod 1 of the reverse circulation drilling rig, so that the excavator can lift the slag drill bit through the lifting lug 4 to shake and discharge the slag in it.

[0018] In the embodiment, a primary reinforcing plate 31 is provided at the connection between the slag scoop and the drill rod 1 of the reverse circulation drilling rig, and a secondary reinforcing plate 32 is provided on the periphery of the primary reinforcing plate 31, one end of the secondary reinforcing plate 32 is fixed on the drill rod 1 of the reverse circulation drilling rig, and the other end is fixed on the upper end of the slag scoop; the fixing point of the secondary reinforcing plate 32 and the slag scoop is located outside the fixing point of the primary reinforcing plate 31 and the slag scoop. The strength of the slag scoop drill bit itself is ensured by the two-stage reinforcing structure.

[0019] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A slag drill bit for use in riprap areas of cross-sea dike tidal flats, characterized in that: It comprises a reverse circulation drilling rig drill rod and a slag scoop barrel fixed at the lower end of the reverse circulation drilling rig drill rod, the slag scoop barrel is a hollow round steel barrel, the lower end of the slag scoop barrel is provided with a slag scoop net radially covering the hollow part of the slag scoop barrel, the slag scoop net is composed of a plurality of staggered steel wire ropes, the length of the steel wire rope is less than the inner diameter of the slag scoop barrel, one end of the steel wire rope is fixed on the inner wall of the slag scoop barrel, and the other end of the steel wire rope is suspended in the air; A primary reinforcement plate is provided at the connection between the slag scoop barrel and the drill rod of the reverse circulation drilling rig, and a secondary reinforcement plate is provided on the outer periphery of the primary reinforcement plate, one end of the secondary reinforcement plate is fixed on the drill rod of the reverse circulation drilling rig, and the other end is fixed on the upper end of the slag scoop barrel; the fixing point of the secondary reinforcement plate and the slag scoop barrel is located outside the fixing point of the primary reinforcement plate and the slag scoop barrel; a lifting lug is provided on the upper end of the drill rod of the reverse circulation drilling rig.

2. A slag drill bit for riprap in a tidal flat across a seawall according to claim 1, characterized in that: A threaded connection part for connecting with the reverse circulation drilling rig is arranged on the upper part of the drill rod of the reverse circulation drilling rig.

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