CN220929315U - Drill bit for pebble stratum - Google Patents

Abstract

The application relates to a drill bit for a pebble stratum, which relates to the technical field of drilling engineering. The first drill bit and the second drill bit have angles, so that the first drill bit and the second drill bit can drill the pebble stratum, can stir pebbles in the pebble stratum and extrude the pebble stratum into a drilling area, and have the effect of improving the drilling work efficiency.

Description

Drill bit for pebble stratum

Technical Field

The application relates to the technical field of drilling engineering, in particular to a hole guiding drill bit for a pebble stratum.

Background

The drilling engineering is an engineering of drilling a stratum downwards or to one side into a cylindrical hole with a certain depth at a preselected ground surface by using mechanical equipment and adopting a professional technology, and the drill bit has very wide application in bridge and building industry construction engineering.

The drill bit used in the existing drilling construction is usually a bucket tooth drill bit, an alloy steel drill bit and the like, but because pebble stratum has higher hardness, pebble gaps in the pebble stratum are smaller and have irregular arrangement modes, when the conventional drill bit is used, pebbles blocked in a drilling area need to be drilled when drilling, the abrasion of the drill bit is larger, the drilling efficiency is low, the drilling cost is high, and when large pebbles are encountered, the drilling is difficult to further carry out, so that the construction efficiency of the whole engineering is influenced.

Disclosure of utility model

The application aims to provide a pilot hole drill bit for pebble strata, which improves the overall engineering construction efficiency.

The application provides a drill bit for a pebble stratum, which adopts the following technical scheme:

The utility model provides a draw hole drill bit for cobble stratum, includes auger stem, base and drill bit, the base with the auger stem is connected, the drill bit includes first drill bit and second drill bit, first drill bit is arranged in the center of base, the second drill bit is arranged in the periphery of base, first drill bit with the equal slope of second drill bit sets up on the base.

Through adopting above-mentioned technical scheme, because first drill bit and second drill bit all have the angle for first drill bit and second drill bit not only can be to the drilling of cobble stratum, when facing the cobble, the cobble can be applyed centrifugal force by first drill bit and second drill bit and is dialled out the drilling point, need not spending a large amount of time like this and go to bore garrulous separation cobble, not only make the work efficiency of drilling improve, after equipment accomplishes the drilling, because the cobble is dialled out, also conveniently takes out the drill bit.

Optionally, the number of the first drill bits is multiple, and the multiple first drill bits are sequentially arranged along a straight line and divided into two groups, and the camber angles of the two groups of first drill bits are opposite.

Through adopting above-mentioned technical scheme for two sets of first drill bits are flabellum form and distribute, and all first drill bits even in the middle of also being the slope setting, compare in the first drill bit in middle part and be the mode that the vertical state set up, first drill bit can extrude the oostone from the drilling region more, and can not block drilling efficiency because in the first drill bit in the middle imbeds corresponding oostone, the oostone in the oostone stratum can be dialled better to first drill bit.

Optionally, the first bit camber angle is in an angle range between 45-75 degrees.

Through adopting above-mentioned technical scheme, when the camber angle of first drill bit is bigger, promptly along the outside inclination of bolt drilling rod is less, can improve the efficiency that drilling bored soil layer part, when the camber angle of first drill bit is less, first drill bit can outwards apply centrifugal force better, extrudes the pebble, through setting up 45-75 angular range for first drill bit is when can dialling the pebble, guarantee advances tooth efficiency.

Optionally, the first drill bit includes a sleeve and a core, the sleeve is fixed on the base, and the core is detachably connected with the sleeve.

When the drill bit drills, the end part of the drill bit bears main drilling work, abrasion cannot be caused in the drilling process, the drill bit has corresponding service life, by adopting the technical scheme, after the first drill bit is abraded, the drill core can be detached from the sleeve, and then a new drill core is replaced, so that the maintenance cost of equipment is reduced.

Optionally, the number of the second drill bits is plural, and plural second drill bits are circumferentially arranged on the outer periphery of the base.

Through adopting above-mentioned technical scheme, the second drill bit setting is in the periphery of base, and when first drill bit was visited into the pebble stratum at the drilling, the second drill bit can protect the base effectively, avoids the base to take place wearing and tearing, improves the life of equipment.

Optionally, the second bit camber angle is in an angle range between 30-60 degrees.

Through adopting above-mentioned technical scheme, the second drill bit can be when further reaming behind the drilling of first drill bit, can also be with dialling the pebble in second drill bit region from first drill bit and further dialling, improves drilling efficiency.

Optionally, the end of the second bit is further from the base than the first bit end.

Through adopting above-mentioned technical scheme, first drill bit is after drilling, and the second drill bit can further creep into in order to enlarge the aperture size of drilling, improves drilling efficiency.

Optionally, the auger stem includes a stem body and a serration, the serration being spirally disposed on an outer periphery of the stem body.

By adopting the technical scheme, the friction force between the spiral drill rod and the pebble stratum is increased by the saw teeth, the auxiliary spiral drill rod can be better embedded into the rock or the soil layer, the drill rod is prevented from shifting during drilling, and the safety and the effectiveness of the drilling process are ensured.

In summary, the present application includes at least one of the following beneficial technical effects:

1. According to the application, the first drill bit and the second drill bit have angles, so that the first drill bit and the second drill bit can drill the pebble stratum, and when facing the pebbles, the pebbles can be pulled out of the drilling points by applying centrifugal force to the first drill bit and the second drill bit, so that a great amount of time is not required to drill and break the separated pebbles, the drilling work efficiency is improved, and the drill bit is conveniently taken out because the pebbles are pulled out after the equipment finishes drilling.

2. According to the application, the camber angles of the two groups of first drill bits are opposite, so that the two groups of first drill bits are distributed in a fan blade shape, all the first drill bits are obliquely arranged, compared with the mode that the middle first drill bit is arranged in a vertical state, the first drill bits can extrude pebbles from a drilling area more, drilling efficiency is not hindered because the middle first drill bit is embedded into corresponding pebbles, and the first drill bits can better pull out pebbles in a pebble stratum.

3. When the camber angle of the first drill bit and the camber angle of the second drill bit are larger, namely, the camber angle of the first drill bit and the camber angle of the second drill bit are smaller, drilling efficiency can be improved, when the camber angle of the first drill bit and the camber angle of the second drill bit are smaller, the first drill bit and the camber angle of the second drill bit can better apply centrifugal force outwards to extrude pebbles, the angle range of 45-75 is set for the first drill bit, the angle range of 30-60 is set for the second drill bit, and the first drill bit and the camber angle are matched with each other, so that the pebbles can be extruded by the drill bit, and drilling efficiency of soil layer parts can be improved.

Drawings

Fig. 1 is a schematic perspective view of a pilot bit for a pebble formation according to the present application.

Fig. 2 is a schematic perspective view of another view of a pilot bit for a pebble bed in accordance with the application.

In the figure, 1, a spiral drill rod; 11. a rod body; 12. saw teeth; 13. a spiral plate; 14. a grouting port; 2. a base; 3. a drill bit; 31. a first drill bit; 311. a sleeve; 312. drilling a core; 32. and a second drill bit.

Detailed Description

The present application will be described in further detail with reference to fig. 1 to 2.

A draw hole drill bit for pebble stratum, refer to fig. 1 and 2, including auger stem 1, base 2 and drill bit 3, base 2 is connected with auger stem 1, and drill bit 3 slope sets up on base 2 and through welded mode fixed connection on base 2.

Referring to fig. 1, a screw rod 1 includes a rod body 11 and saw teeth 12, the rod body 11 is hollow, a grouting opening 14 is formed in an outer side wall of the rod body 11, slurry can flow out from the grouting opening 14 and lubricate a drill bit 3, the saw teeth 12 are spirally arranged on the periphery of the rod body 11, specifically, a spiral plate 13 is arranged on the rod body 11, the spiral plate 13 can be spirally arranged clockwise or spirally arranged anticlockwise, and the screw plate 13 is specifically arranged according to a rotation direction of a drill bit 3. The spiral plate 13 is sleeved on the rod body 11 and fixedly connected with the rod body 11, the number of the saw teeth 12 is multiple, and the saw teeth 12 are sequentially distributed on the outer edge of the spiral plate 13 along the spiral track of the spiral plate 13 so as to assist the spiral drill rod 1 to be better embedded into rock or soil layers during rotation, and ensure the safety and effectiveness of the drilling process.

Referring to fig. 1, the saw teeth 12 are disposed on one side of the shank 11 near the drill bit 3, and the other side of the shank 11 is not provided with the saw teeth 12, so as to reduce the production cost of the bolt drill rod, further, adjacent saw teeth 12 may be disposed in different shapes, in this embodiment, saw teeth 12 having different sizes may be alternately disposed, so as to increase the friction between the auger stem 1 and the pebble formation, and improve the drilling efficiency.

Referring to fig. 1, the drill bit 3 includes a first drill bit 31, where the first drill bit 31 is obliquely disposed on the base 2, and the camber angle of the first drill bit 31 ranges from 45 degrees to 75 degrees, and as a preferred mode of the embodiment of the present application, the camber angle of the first drill bit 31 is 75 degrees to improve the tooth entering efficiency, the number of the first drill bits 31 is multiple, and the multiple first drill bits 31 are sequentially arranged in a straight line, specifically, the number of the first drill bits 31 is 3 in the embodiment, and in other embodiments, the present application may also be specifically disposed according to practical situations.

Referring to fig. 1 and 2, the camber angles of the two first drill bits 31 located at both sides of the central first drill bit 31 are opposite to each other to better spread pebbles of a pebble layer, and it should be noted that, in a great number of practical processes, when the central first drill bit 31 is vertically disposed, the central first drill bit 31 is embedded into the pebbles and drills, which makes it difficult for two adjacent first drill bits 31 to clean the pebbles, and reduces drilling efficiency, so that the central first drill bit 31 in this embodiment is obliquely disposed, and the central first drill bit 31 may maintain the camber angle of the same orientation as any one of the adjacent two first drill bits 31.

Referring to fig. 2, the first drill bits 31 may be provided in a number of 3 or more in addition to the arrangement of the present embodiment, wherein in one embodiment, the first drill bits 31 are divided into two groups along the length direction, the camber angles of the two groups of first drill bits 31 are opposite, and in another embodiment, the camber angles of the adjacent first drill bits 31 are opposite, so that both arrangement modes can ensure cleaning of pebbles in a drilling area.

Referring to fig. 1 and 2, the drill bit 3 includes a plurality of second drill bits 32, specifically, in this embodiment, the number of second drill bits 32 is two, and two second drill bits 32 are circumferentially disposed on the outer periphery of the base 2, and in other embodiments, the number of second drill bits 32 may be further increased to improve the drilling efficiency. The camber angle of the second drill bit 32 is in the range of 30-60 degrees, specifically, the camber angle of the second drill bit 32 is 45 degrees in this embodiment, and further, the end of the second drill bit 32 is farther from the rod 11 than the base 2, so that the base 2 can be protected and friction between the base 2 and the pebble stratum can be prevented when the drill bit 3 is advanced.

Referring to fig. 1, the end of the first drill bit 31 is farther from the base 2 than the end of the second drill bit 32, and when drilling, the first drill bit 31 performs the main drilling operation with the pebble formation, and the second drill bit 32 further expands the aperture range of the drilled hole after the first drill bit 31 drills.

Referring to fig. 1 and 2, the first drill bit 31 includes a sleeve 311 and a drill core 312, wherein the drill core 312 can be preferentially contacted with a pebble stratum and bear drilling work, the sleeve 311 is fixed on the base 2 in a welded manner, one end of the drill core 312 is sharp, the other end of the drill core 312 is rod-shaped, and one end of the rod-shaped end of the drill core is in threaded connection with the sleeve 311 so as to facilitate disassembly and assembly of the drill core 312, and it is noted that the second drill bit 32 has the same structure as the first drill bit 31 and is not described in detail herein.

The implementation principle of the embodiment of the application is as follows: the drill bit 3 is vertically arranged at a point to be drilled, the rod body 11 is then rotated, the drill bit 3 drills a pebble stratum, and as the first drill bit 31 has an inclination angle, and the outer inclination angles of the two drill bits 3 located at the outermost sides are opposite, when the auger stem 1 rotates, the drill bit 3 can pull out larger fragments and partial pebbles generated by drilling from a drilling area while drilling, when the first drill bit 31 works, the second drill bit 32 located at the periphery of the base 2 further drills to enlarge the aperture range of the drilling, and pulls out fragments and partial pebbles in the corresponding area of the second drill bit 32, and meanwhile, as the second drill bit 32 is circumferentially arranged on the periphery of the base 2, the second drill bit 32 can also effectively protect the base 2 from being worn by the pebbles while drilling by the drill bit 3, so that normal operation of equipment is ensured.

The embodiments of the present application are all preferred embodiments of the present application, and are not intended to limit the scope of the present application, wherein like reference numerals are used to refer to like elements throughout. Therefore: all equivalent changes in structure, shape and principle of the application should be covered in the scope of protection of the application.

Claims (8)

1. A draw hole drill bit for cobble stratum, includes auger stem (1), base (2) and drill bit (3), its characterized in that, base (2) with auger stem (1) are connected, drill bit (3) include first drill bit (31) and second drill bit (32), first drill bit (31) are arranged in the central authorities of base (2), second drill bit (32) are arranged in the periphery of base (2), first drill bit (31) with second drill bit (32) all slope sets up on base (2).

2. A pilot bit for a pebble formation according to claim 1, wherein the number of first bits (31) is plural, the plural first bits (31) being arranged in sequence along a straight line and being divided into two groups, the camber angles of the two groups of first bits (31) being opposite.

3. A pilot bit for a pebble formation according to claim 2, wherein the camber angle of the first bit (31) is in the range 45-75 degrees.

4. A pilot bit for a pebble formation according to claim 1 or 2 or 3, characterized in that the first bit (31) comprises a sleeve (311) and a core (312), the sleeve (311) being fixed to the base (2), the core (312) being detachably connected to the sleeve (311).

5. A pilot bit for a pebble formation according to claim 1, wherein the number of second bits (32) is plural, a plurality of the second bits (32) being circumferentially arranged on the periphery of the base (2).

6. A pilot bit for a pebble formation according to claim 5, wherein the camber angle of the second bit (32) is in the range 30-60 degrees.

7. A pilot bit for a pebble formation according to claim 1, characterized in that the end of the second bit (32) is further from the seat (2) than the end of the first bit (31).

8. A pilot bit for a pebble formation according to claim 1, characterized in that the auger stem (1) comprises a stem (11) and serrations (12), the serrations (12) being helically arranged around the periphery of the stem (11).