CN207093008U - Drill - Google Patents

Abstract

The utility model discloses a drilling bit and relates to the technical field of complex geological construction equipment. The drill bit includes a cylinder and several drill teeth arranged at the bottom of the cylinder for cutting and drilling. The top of the cylinder is provided with a connecting piece for connecting the drill rod of the drilling rig. The cylinder The inner wall of the body is provided with at least one stopper for cutting the rock core, and the inner wall of the cylinder and below the stopper are provided with at least two rotating baffles for taking out the cut rock core, so The bottom end of the cylinder body is fixed with a plurality of drill seats detachably connected with the drill teeth respectively. The utility model arranges a block and a rotating baffle on the inner wall of the cylinder, and utilizes the rotation of the drill pipe and the cylinder to easily break the rock core while rotating the rock; It is plugged in the cylinder to take the core out of the hole; it can also replace the appropriate drill teeth at any time according to the construction environment, which has a wide range of applications and effectively improves work efficiency.

Description

Drill bit

technical field

The utility model relates to the technical field of complex geological construction equipment, in particular to a drilling bit.

Background technique

At present, the methods for forming holes of cast-in-situ piles mainly include dry operation method, mud retaining method, casing pipe method, etc., wherein, the mud retaining method generally adopts drilling tools such as diving drills and rotary drilling to form holes. Rotary drilling rigs generally adopt hydraulic crawler-type telescopic chassis, self-lifting and collapsible drill mast, telescopic drill pipe, automatic detection and adjustment of verticality, digital display of hole depth, etc. The operation of the whole machine generally adopts hydraulic pilot control and load sensing. It has the characteristics of light operation and comfort. The main and auxiliary winches can be applied to the needs of various situations on the construction site. This type of drilling rig is suitable for dry or wet drilling and rock formation operations with different drilling tools. It can also be equipped with long auger drills, underground diaphragm wall grabs, vibrating pile hammers, etc. to achieve multiple functions. It is mainly used for municipal construction. , Highway bridges, industrial and civil buildings, underground diaphragm walls, water conservancy, anti-seepage slope protection and other foundation constructions.

The rock barrel drill used in the rotary drilling rig is a relatively special drill bit, and its main advantage is that the footage is faster. For bedrock formations with higher hardness, large boulder layers and hard permafrost, it is necessary to cut out the ring groove through the rock barrel drill first, and then use the auger bit or rotary drilling bit to drill in. Directly use the short auger bit or It is just more difficult to drill a hole with a rotary drill bit. The cutting tools for rock barrel drilling can be divided into bucket teeth and picks, which are suitable for soft rock and medium hard rock respectively. The main function of the rock barrel drill is to loosen and hollow out the surroundings of the core in the hole, so as to create a broken free surface for the subsequent insertion of the rock-embedded short auger bit to break the core. However, because the rock itself is too hard, it is often difficult to break and take out the core smoothly during the rotation process.

Utility model content

The purpose of the utility model is to provide a drilling bit to solve the technical problem that the rock core is not easy to be taken out in the prior art.

In order to achieve the above object, the technical solution adopted by the utility model is: provide a drilling bit, including a cylinder and several drill teeth arranged at the bottom of the cylinder for cutting and drilling, the cylinder The top end of the cylinder is provided with a connecting piece for connecting the drill pipe of the drilling rig, the inner wall of the cylinder is provided with at least one stopper for cutting the core, and the inner wall of the cylinder is at least provided with a stopper below the stopper Two rotating baffles are used to take out the cut core. The bottom end of the cylinder is fixed with a plurality of drill seats detachably connected with the drill teeth.

Further, the rotating baffle includes a fixed plate fixed to the inner wall of the cylinder and a rotating plate rotatably connected to the fixed plate, and a limit block is provided on the fixed plate to limit the rotation of the rotating plate, The rotation angle of the rotating plate is 0-90 degrees.

Further, at least one observation hole for observing the inside of the cylinder is opened at the top of the cylinder.

Further, the outer wall of the cylinder is provided with a plurality of guide strips for guiding and centering, each of the guide strips is spirally arranged on the outer wall of the cylinder.

Further, a plurality of the guide strips are symmetrically arranged in pairs on both sides of the cylinder body, and the distance between the two adjacent guide strips is equal.

Further, the section of the guide bar is any one of circular, rectangular, trapezoidal or triangular.

Further, the stopper is provided with an inclined surface for inserting the core, and the distance between the inclined surface and the inner wall of the barrel gradually increases along the direction from the bottom end of the barrel to the top end of the barrel.

Further, a plurality of reinforcing ribs are fixed on the connecting piece, and each of the reinforcing ribs is provided with a hooking hole for hooking the barrel.

Further, at least one drain hole for draining water is opened on the cylinder body.

Further, each of the drill seats is arranged obliquely outwards and distributed circumferentially around the center of the barrel, and each of the drill seats is correspondingly provided with one drill tooth.

Compared with the prior art, the beneficial effect of adopting the above-mentioned technical solution lies in that: the utility model sets a stopper and a rotating baffle on the inner wall of the cylinder, and utilizes the rotation of the drill pipe and the cylinder, so that the rock can be drilled while rotating. At the same time, the rock core can be easily broken; and the rock core can be blocked in the cylinder by the self-weight of the rotating baffle to make it in a horizontal position, so that the rock core can be taken out of the hole; the appropriate drill teeth can also be replaced at any time according to the construction environment. It has a wide range of applications and can effectively improve work efficiency.

Description of drawings

Fig. 1 is a schematic diagram of the three-dimensional structure of the drilling bit provided by the embodiment of the present invention.

Fig. 2 is a front view of the drilling bit provided by the embodiment of the present invention.

Fig. 3 is a schematic cross-sectional structure diagram along line A-A in Fig. 2 .

FIG. 4 is a bottom view of FIG. 2 .

Among them, the reference signs in the figure: 1-cylinder; 2-drill teeth; 3-connector; 4-block; 5-rotating baffle; 51-fixed plate; 52-rotating plate; 6-drill base; 7-observation hole; 8-guide bar; 9-reinforcing rib; 10-hooking hole; 11-drainage hole.

Detailed ways

In order to make the purpose, technical solutions and advantages of the utility model clearer, the utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model, and are not intended to limit the utility model.

It should be noted that when an element is referred to as being “fixed” or “disposed on” another element, it may be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

It should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "top", "bottom", "inner", "outer" and the like are based on the orientation or positional relationship shown in the drawings, and are only In order to facilitate the description of the present invention and simplify the description, it does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.

Referring to Fig. 1 to Fig. 4, the drilling bit provided by the embodiment of the utility model includes a cylinder body 1 and several drill teeth 2 arranged at the bottom end of the cylinder body 1 for cutting and drilling, and the cylinder body 1 is provided with a connector 3 for connecting the drill pipe of the drilling rig, and the inner wall of the cylinder 1 is provided with at least one stopper 4 for cutting the core, and the inner wall of the cylinder 1 is located at the stopper 4 is provided with at least two rotating baffles 5 for taking out the cut core, and the bottom end of the cylinder 1 is fixed with a plurality of drill bases 6 which are detachably connected with the drill teeth 2 respectively. .

The drilling bit provided by the utility model, compared with the prior art, sets the stopper on the inner wall of the cylinder, drives the core to rotate under the rotation of the drill pipe and the cylinder, so that the core is easily broken; When lifting the drill, use the self-weight of the rotating baffle to make it in a horizontal position, which is convenient for sealing the core in the cylinder, so that the core can be taken out of the hole smoothly; you can also replace the appropriate drill teeth according to the surrounding construction environment. It has a wide range, is easy to promote, and greatly improves work efficiency.

What needs to be explained here is that in this embodiment, the drilling rod of the rotary drilling rig is mainly inserted into the mounting hole of the connecting piece 3, and the connecting hole on the connecting piece 3 is used to fix the drilling rod on the mounting hole through the bolt. on the barrel 1. In fact, there may be other detachable fixed connection methods. It can be understood that the detachable fixed connection between the connecting piece 3 and the drill pipe for rotary drilling is to facilitate timely reaming in stages. Replace tools such as drill bits or slag buckets of different grades; through the connecting piece 3, it is fixedly connected with the drill pipe of the rotary drilling rig, so that when drilling, driven by the driving mechanism of the rotary drilling rig, the entire drill bit can be synchronized with the drill pipe Rotate, descend or lift, thereby driving the drill teeth 2 to continuously break the rock core, drive into the formation or take it away from the rock core to the ground.

Further, please refer to Fig. 3 and Fig. 4, as a specific embodiment of the drilling bit provided by the present invention, the rotating baffle 5 includes a fixing plate 51 fixed on the inner wall of the cylinder 1 and connected to the The fixed plate 51 is rotatably connected to the rotating plate 52, and the fixed plate 51 is provided with a limit block for limiting the rotation of the rotating plate 52, and the rotating angle of the rotating plate 52 is 0-90 degrees. In the present embodiment, the number of the rotating baffles 5 is three, and the rotating baffles 5 are hinges, welded to the inner wall of the cylinder 1 in the circumferential direction, and the core rotates the rotating baffles 5 when the drill drills in. The plate 52 pushes into the barrel, and when the drill is lifted, the rotating plate 52 is in a horizontal position by its own weight to block the core in the barrel, and then the core is taken out of the hole, effectively improving work efficiency.

Further, please refer to Fig. 1 and Fig. 4, as a specific embodiment of the drill bit provided by the present invention, at least one observation hole for observing the inside of the barrel 1 is opened on the top of the barrel 1 7. In this embodiment, the number of the observation holes 7 is four, each of the observation holes 7 is a through hole, so as to observe the situation inside the cylinder 1 in all directions, and each of the observation holes 7 surrounds the Distribution around the connector 3. In addition, part of the material can also be saved. In fact, the function of opening the observation hole 7 at the top of the cylinder body 1 is to make the pressure between the bottom and the top of the cylinder body 1 continuous.

Further, please refer to Fig. 1 to Fig. 4, as a specific embodiment of the drill bit provided by the present invention, the outer wall of the cylinder 1 is provided with a plurality of guide strips 8 for guiding and centering, each The guide strips 8 are spirally arranged on the outer wall of the cylinder body 1 .

Further, please refer to Fig. 1 to Fig. 4, as a specific embodiment of the drill bit provided by the present invention, a plurality of guide strips 8 are symmetrically arranged on both sides of the cylinder body 1 in pairs, and two in two The distance between adjacent guide strips 8 is equal. When the drill bit rotates, the drilling slag will move up along the guide bar 8 with the rotation of the drill bit, which can prevent the drilling slag from accumulating at the bottom of the hole, thus avoiding repeated drilling and affecting the hole forming efficiency. The protective fluid can flow up and down along the space formed between the guide strips 8, so as to avoid excessive local fluid pressure and affect the normal operation of the drilling tool.

Further, please refer to Fig. 1 to Fig. 4, as a specific embodiment of the drilling bit provided by the present invention, the section of the guide bar 8 is any one of circular, rectangular, trapezoidal or triangular.

Further, please refer to Fig. 3 and Fig. 4, as a specific embodiment of the drill bit provided by the present invention, the stopper 4 is provided with an inclined surface for inserting the rock core, and the inclined surface is opposite to the barrel. The distance between the inner wall of the body 1 increases gradually along the direction from the bottom end of the cylinder body 1 to the top end of the cylinder body 1 . In this embodiment, the number of the stoppers 4 is three, which are circumferentially distributed on the inner wall of the cylinder 1, and the stoppers 4 are cut and manufactured by a thick steel plate and welded to the inner wall of the cylinder 1; manufacturing Low cost and suitable for wide use.

Further, please refer to Fig. 1 to Fig. 3, as a specific embodiment of the drilling bit provided by the present utility model, a plurality of reinforcing ribs 9 are fixed on the connecting part 3 for strengthening the connecting part 3 The fixed connection relationship with the cylinder 1 ensures a reliable connection between the two and improves the torsion and compression resistance of the drill bit; each of the reinforcing ribs 9 is provided with a hook for hooking the cylinder The hooking hole 10 is used to move the position of the cylinder 1 mechanically or manually.

Further, please refer to FIG. 1 to FIG. 3 , as a specific embodiment of the drilling bit provided by the present invention, at least one drain hole 11 for draining water is opened on the cylinder body 1 . In this embodiment, the number of the drainage holes 11 is two, and when the drilling slag moves up with the guide bar 8 to the vicinity of its upper end, it can fall into the cylinder body 1 through the drainage holes 11. cavity, when the drill is lifted, the operation of carrying and unloading the slag is completed; in addition, the protective liquid in the pile hole can circulate inside and outside the cylinder 1 through the drainage hole 11, thereby ensuring that the liquid inside and outside the cylinder 1 The pressure is balanced; air can also be discharged to prevent the difficulty of slag unloading, and it can also play a role in observing and understanding the internal situation of the drill bit.

Further, please refer to Fig. 1 to Fig. 4, as a specific embodiment of the drill bit provided by the present invention, each of the drill bases 6 is arranged obliquely outward and around the center of the cylinder 1 in a circumferential direction. Each drill seat 6 is correspondingly provided with one drill tooth 2 . It should be noted that the drill base 6 in this embodiment is welded to the lower edge of the cylinder 1. Preferably, the cross-sectional shape of the drill base 6 is circular, that is, the entire drill base 6 is cylindrical. In fact, the cross-sectional shape of the drill seat 6 can be polygonal or the like. It can be understood that the detachable fixed connection between the drill teeth 2 and the drill base 6 is to facilitate the selection of different drill teeth 2 for cutting according to needs, or to allow different drill teeth 2 to be mixed to cut, or when one of the drill teeth 2 is severely worn, it is convenient to replace the drill teeth 2 in time to maximize the drilling speed. The drill base 6 can be selected from heat-treated high-strength alloy steel to maintain its high strength, toughness and high wear resistance, thereby improving the service life of the drill bit. The inclination angles of the drill teeth 2 that are detachably fixedly connected to each of the drill bases 6 are different, and this design is to facilitate the drill bit to cut hard rock in multiple directions during the drilling and cutting process. , so as to speed up the drilling speed and improve the drilling effect. For barrel drills, the drill teeth 2 can be bucket teeth, picks, roller cone bits, etc., because the improvement is mainly aimed at hard rock formations, therefore, considering the characteristics of the picks drilling hard formations quickly, the drill The tooth 2 is a pick, specifically, a bullet-type pick is preferred in this embodiment. The rock-cutting angle of bullet-type picks is different from that of ordinary rotary drill bits in the past. It is larger than the cutting angle of rotary drill bits. Generally, it is 50°-65°, so that it will not slip off on the rock surface and can increase the rock-cutting speed. In fact, not only all the picks can be installed on the drill stand 6, but also the picks can be mixed with other tooth shapes.

When working, please refer to Fig. 1 to Fig. 4 again. When the drill bit is drilled, the core pushes the rotating plate 52 back into the cylinder, and utilizes the rotation of the drill pipe and the cylinder body 1 and the action of the stopper 4 The rock core is broken down, so that the rock core can be easily broken while the rock is rotated, and when the drill is lifted, the rotating plate 52 is in a horizontal position by its own weight to block the rock core in the cylinder, and then the The core is taken out of the hole; suitable drill teeth can also be replaced at any time according to the construction environment, which has a wide range of applications and effectively improves work efficiency.

The above is only a preferred embodiment of the utility model, but the scope of protection of the utility model is not limited thereto. Any equivalent replacement or change of the new technical solution and its concept should be covered within the protection scope of the present utility model.

Claims (10)

1. Drilling bit, including a cylinder and several drill teeth arranged at the bottom of the cylinder for cutting and drilling, and the top of the cylinder is provided with a connecting piece for connecting the drill rod of the drilling rig. Its characteristics In that: the inner wall of the barrel is provided with at least one block for cutting the rock core, and the inner wall of the barrel and below the block are at least two blocks for taking out the cut rock core. Rotating the baffle, the bottom end of the cylinder is fixed with a plurality of drill seats detachably connected with the drill teeth. 2. The drilling bit according to claim 1, wherein the rotating baffle includes a fixed plate fixed to the inner wall of the cylinder and a rotating plate rotatably connected to the fixed plate, the fixed plate A limit block is provided to limit the rotation of the rotating plate, and the rotating angle of the rotating plate is 0-90 degrees. 3. The drilling bit according to claim 1, characterized in that: at least one observation hole for observing the inside of the cylinder is opened at the top of the cylinder. 4. The drilling bit according to any one of claims 1-3, characterized in that: the outer wall of the cylinder is provided with a plurality of guide strips for guiding and centering, each of the guide strips is helically arranged on the outer wall of the cylinder. 5 . The drilling bit according to claim 4 , wherein a plurality of the guide strips are arranged symmetrically in pairs on both sides of the cylinder, and the distances between the two adjacent guide strips are equal. 5 . 6. The drilling bit according to claim 5, wherein the section of the guide bar is any one of circular, rectangular, trapezoidal or triangular. 7. The drilling bit according to claim 1, characterized in that: the block is provided with an inclined surface for inserting the core, and the distance between the inclined surface and the inner wall of the cylinder is along the bottom of the cylinder The direction to the top of the barrel gradually increases. 8. The drilling bit according to claim 1, characterized in that: the connecting piece is fixed with a plurality of reinforcing ribs, and each of the reinforcing ribs is provided with a hooking hole for hooking the cylinder . 9. The drilling bit according to claim 1, wherein at least one drain hole for draining water is opened on the cylinder body. 10. The drilling bit according to claim 1, characterized in that: each of the drill seats is arranged obliquely outward and distributed circumferentially around the center of the cylinder, and each of the drill seats is correspondingly provided with a The drill teeth.