CN211900470U - Earth drilling drill bit - Google Patents

Abstract

A soil drilling bit comprises a cutter ring, a guide ring, a soil gathering ring and a drill barrel, wherein a connector is arranged on the upper side of the drill barrel, cutter blades are arranged on the lower portion of the drill barrel, the cutter blades are symmetrically arranged on two sides of the drill barrel, the angle of the drill barrel corresponding to an arc is 90 degrees, the lower end of each cutter blade is connected with the cutter ring, the cutter ring is of a spiral structure, the cutter rings are arranged on two sides of the drill barrel in a central symmetrical structure, the guide ring is arranged between the cutter blades on the two sides, and the guide ring is of a spiral structure; the soil gathering ring is connected to the inner side of the blade and is of a spiral structure, and the directions of spiral lines of the blade ring, the guide ring and the soil gathering ring are consistent.

Description

Earth drilling drill bit

Technical Field

The utility model relates to a drill bit field especially relates to a bore native drill bit.

Background

In the embedding of seismic exploration detectors, a gasoline engine or a motor is adopted as drilling power at present, a hole matched with the detector is drilled on a common stratum by combining a twist drill or a common hollow drill, and the depth of the hole is designed according to different terrain and data requirements. In most areas in North China, holes with the depth of 30 cm can be drilled to meet the requirements. Most of North China are clay layers, the viscosity of the clay layers is between 0.80 and 2.70ms, the viscosity of the clay layers is 23.9Kpa, even if the clay layers are powdery, the viscosity of the clay layers is between 0.00 and 5.80ms, the viscosity of the clay layers is 18.4Kpa, and the average viscosity of the soil is about 15.0 Kpa due to large humidity and water content of general soil. When the hollow drill cylinder is used for drilling under the condition, the drill cylinder of the drilling machine is difficult to penetrate into a required position at one time due to the strong adhesion of soil and the overlarge pressure of the soil. And because the drill barrel is extruded by soil on two sides, when a certain depth is reached, the drill bit and the drill barrel can be clamped and cannot rotate continuously due to overlarge stress and friction of the drill barrel of the punching machine, and heat accumulation can be brought by overlarge pressure and overlarge friction. The side surface of the cylindrical soil column in the drilling barrel can be melted in winter construction to form larger adhesion force, and at the moment, the cylindrical soil column can only be manually lifted by an operator to carry out desilting and heat dissipation, so that the construction operation is seriously influenced.

Twist drill rod operation process and problems: the drill bit rotates around the centering shaft and simultaneously moves axially. The soil is cut under the action of torque and axial force of the drill bit, is broken and loosened under the action of extrusion and centrifugal force of the working blades, forms soil flow and presses the pit wall, and meanwhile, the soil flow is lifted along the page and conveyed to the ground surface. When the soil flow moves to the position without pit wall blocking, the broken soil is thrown to the periphery of the pit due to the centrifugal force, and the whole pit digging process is completed. In the drilling process, the area of a broken soil layer is relatively large, the reaction force is large when the hole is drilled to 20 cm, the labor intensity is very high, the potential safety hazard of arm sprain exists, and the problems seriously affect the wave detector embedding efficiency. Conventional drilling barrels have been unable to meet the actual drilling requirements.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the aforesaid to prior art exists is not enough, provides a bore native drill bit that reduces the adhesion.

The utility model aims at realizing through the following technical scheme:

the utility model provides a bore native drill bit, includes sword ring, guide ring, gathers native ring, bores a section of thick bamboo, it has the connector to bore a section of thick bamboo upside, it has the sword page or leaf to bore a section of thick bamboo lower part, sword page or leaf symmetry sets up in boring a section of thick bamboo both sides, it is 90 degrees to bore a section of thick bamboo corresponding circular arc angle, sword ring is connected to sword page or leaf lower extreme, the sword ring is helical structure, the sword ring uses central symmetrical structure to set up in boring a section of thick bamboo both sides, sets up the guide ring between the sword page or leaf of both sides, the guide ring is helical.

The soil gathering ring is connected to the inner side of the blade and is of a spiral structure, and the directions of spiral lines of the blade ring, the guide ring and the soil gathering ring are consistent.

Has the advantages that:

the hollow drill principle is utilized, the working area is reduced to replace a twist drill, and the area of a drill cylinder is reduced on the hollow drill, so that the drill cylinder is half of the original area and is a semicircular symmetrical surface, namely two quarters of the original area is removed from the cylinder wall. The contact area of the drill cylinder and soil is reduced, and the improved symmetrical blade can generate strong resonance due to strong vibration generated by high-speed running of an engine or a motor. The adhesion of clay on the inner wall of the drill cylinder is reduced by utilizing the vibration characteristic. And in order to overcome the problem of adhesion, the inner wall of the drill cylinder is additionally provided with an earth guide structure, so that the downward stress is reduced, the drill cylinder and a drilling machine are easier to descend by utilizing the guide principle when drilling, and part of earth is thrown out of a hole opening through a guide ring by centripetal force generated when the drill cylinder rotates to work, so that the working pressure in the hole is reduced. When the drill barrel of the drilling machine is lifted out after drilling, due to the guiding effect in the barrel, cylindrical sediments formed in the inner cavity of the drill barrel in the drilling process cannot be compacted on the inner wall of the drill barrel but are loosely attached to the surface of the inner wall of the drill barrel, and the sediments are easily cleaned out of the hole due to the design.

Drawings

Fig. 1 is a schematic view of a structure of an earth boring drill according to the present invention.

Fig. 2 is a cross-sectional view of the earth boring drill of the present invention.

Fig. 3 is a top sectional view of the earth boring drill according to the present invention.

Fig. 4 is a schematic perspective view of the earth boring drill of the present invention.

Detailed Description

The invention is explained in more detail below with reference to the figures and examples:

the utility model provides a bore native drill, includes sword ring 3, guide ring 4, gathers native ring 5, bores a section of thick bamboo 6, it has connector 2 to bore 6 upsides of a section of thick bamboo, it has sword page or leaf 1 to bore 6 lower parts of a section of thick bamboo, 1 symmetry of sword page or leaf sets up in 6 both sides of a section of thick bamboo, it is 90 degrees to bore 6 corresponding circular arc angles of a section of thick bamboo, sword ring 3 is connected to 1 lower extreme of sword page or leaf, sword ring 3 is helical structure, sword ring 3 uses central symmetrical structure to set up in 6 both sides of a section of thick bamboo, sets up guide ring 4 between 1 sword page or leaf in both sides, guide ring 4 is helical structure.

The soil gathering ring 5 is connected to the inner side of the blade 1, the soil gathering ring 5 is of a spiral structure, and the spiral line directions of the blade ring 3, the guide ring 4 and the soil gathering ring 5 are consistent.

The hollow drill principle is utilized, the working area is reduced to replace a twist drill, and the area of a drill cylinder is reduced on the hollow drill, so that the drill cylinder is half of the original area and is a semicircular symmetrical surface, namely two quarters of the original area is removed from the cylinder wall. The contact area of the drill barrel 6 and soil is reduced, and the improved symmetrical blade 1 can generate strong resonance due to strong vibration generated by high-speed running of an engine or a motor. The adhesion of clay on the inner wall of the drill cylinder is reduced by utilizing the vibration characteristic. And in order to overcome the problem of adhesion, the inner wall of the drill cylinder is additionally provided with an earth guide structure, so that the downward stress is reduced, the drill cylinder and a drilling machine can descend more easily by utilizing the guide principle during drilling, and part of earth can be thrown out of a hole opening through the guide ring 4 by the centripetal force generated during the rotation of the drill cylinder, so that the working pressure in the hole is reduced. When the drill barrel of the drilling machine is lifted out after drilling, due to the guiding effect in the barrel, cylindrical sediments formed in the inner cavity of the drill barrel in the drilling process cannot be compacted on the inner wall of the drill barrel but are loosely attached to the surface of the inner wall of the drill barrel, and the sediments are easily cleaned out of the hole due to the design.

The structure of the drill barrel 6 becomes unstable due to the fact that the drill barrel is cut by half the area. When drilling, the cutter blades are easily broken under the rotary collision with soil, so that the soil gathering ring 5 is arranged, the soil gathering ring 5 is installed at an angle of 30 degrees, the cutter blades 1 on two sides are connected to form a whole, and the stability of the whole drill cylinder is enhanced. When the lower structure of the tubular drill drum 6 is divided into four parts, the strength and stability are affected. According to different humidity of soil layers, the position of the soil gathering ring 5 on the drill pipe is correspondingly changed. When the soil humidity is high, the position of the soil gathering ring 5 is higher, and the position of the soil gathering ring 5 is lower as the humidity is lower. The reason for this is that soil with high soil layer humidity is easier to gather, if soil gathering ring 5 is arranged at the lower end under the condition of high humidity, then along with the increase of the drilling depth, a large amount of soil will gather near soil gathering ring 5, along with the increase of pressure, finally soil will be stuck near soil gathering ring 5, then the drill pipe will be difficult to continue to drill, that is to say, the drill pipe must be pulled out for desilting to be able to operate next time. The setting of the soil gathering ring 5 has a great relationship with the soil moisture. The soil gathering ring 5 is arranged at an angle of 30 degrees clockwise, and in the drilling process, the soil gathering ring 5 plays a guiding role like a thread, so that the labor intensity of manual operation is reduced. The centripetal force generated by the soil gathering ring 5 at the upper end when the drilling barrel rotates to work can throw partial soil out of the hole opening, and the effect of reducing the working pressure in the hole is also achieved.

The cutter ring 3 is welded at the lower end of the cutter blade 1, the cutter ring 3 is made of alloy steel, and the cutting edge is in a notch shape, so that the pressure of soil on the bottom of the drill cylinder is reduced to a greater extent, the angle is clockwise 30 degrees, the working part is arranged on the inner wall of the cutter blade 1, the working area of the cutter head of the cutter ring 3 is small in the drilling process, the tail end part can also play a role in guiding and pressing like threads, and the labor intensity of manual operation is reduced. The cutter ring 3 can perform drilling and cutting functions. Along with the degree of depth increase of creeping into, a large amount of earth will gather near cutter ring upper end and soil gathering ring, along with pressure increase, final earth can block near cutter ring and soil gathering ring, make loose earth sediment no longer the secondary drop into the drilling, but inside attached to the drill barrel 6, make the pipe wall no longer suffer sediment extrusion rig decline resistance littleer, and this design uses when soil viscidity is great and is particularly outstanding, including the holistic angle design of cutter ring, loose earth gathers behind the drill pipe is inside, can not the adhesion drilling wall again, the adhesion force has greatly been reduced, it becomes simpler to make to bore to get to propose the drilling machine after finishing.

The center of the connector 2 is aligned with the position hole of the detector, then the level meter is calibrated, and when the level meter reaches target parameters, the motor switch is pressurized. At this point power is transmitted from the motor along the drive shaft to the drill drum 6 of the drilling machine so that the drill drum 6 starts to rotate. Due to the downward horizontal pressure of the operator on the drilling machine, the cutter ring 3 of the drilling machine and the drilled hole start to break the ground surface for drilling. The soil layer is damaged under the rigid action of the cutter ring 3, soil sediments slowly enter the cutter blade 1 under the action of the soil gathering ring without blocking the cutter blade 1, and the drilling process is continued. When the drill cylinder 6 is deep into the ground surface by 3-4 cm under the action of pressure, the cutter ring 3 starts to exert, and the lateral friction force of the cylinder wall is greatly reduced due to the small contact area with the hole wall. The inclination of sword ring 3 is 30 degrees, the in-process of drilling downwards can form the screw thread form, when boring a section of thick bamboo 6 and descend, inside soil core changes to the atress condition of boring a section of thick bamboo 6, originally because inclined plane principle FL = GH behind the vertical ascending frictional force, L increases by a wide margin and makes the resistance reduce greatly, and boring a section of thick bamboo 6 decline in-process, earth can be along with the rotation of screw thread, the cylinder of boring a section of thick bamboo inner chamber screw thread is agreed with on the surface in the column formation, the sediment of being produced at the boring a section of thick bamboo inner chamber by the compaction in the past has been solved, make operating personnel can only artificially manually clear away. At the moment, the friction between the inner wall and the soil core of the drilled hole is reduced, the separation of the soil core and the drill cylinder is simpler (only the drill cylinder is required to be rotated after being lifted to throw away the soil core sediment), so that the operation process is lighter, and the operator continues to exert force downwards until the set position is reached. And (5) finishing drilling. After drilling, the drill only needs to idle for a few times, loose soil can be thrown out of the drill cylinder under the action of centrifugal force due to high-speed running and vibration of the motor or the gasoline engine, and the whole drilling process becomes smoother.

As alloy steel is adopted in the aspect of the drill barrel 6, the hardness is enhanced, and the drill barrel is excellent in performance in various extreme drilling geological environments. By reducing the contact area between the drill cylinder 6 and the soil, the drill cylinder of the drill bit can not be clamped or even stopped due to excessive friction force when a soil layer with higher viscosity is drilled. And is matched with a level gauge for use, so that the drill barrel 6 is vertically downward at a position point, and the drilling can be completed at one time. Meanwhile, the horizontal stress with the soil layer can be reduced by the small contact area, the outer wall of the drilling machine drill barrel 6 is prevented from being adhered to the soil excessively, and the wall of the obtained drilled hole is smooth and is not damaged. The drill is pushed downwards to be less in internal friction force, the soil core and the drill barrel 6 are separated more quickly after the drill barrel 6 is pulled out, and secondary use of the drill barrel 6 of the drilling machine is not affected. The time for drilling the primary hole is 4-7 seconds, the drilling efficiency is greatly improved, the speed and the quality are qualitatively leaped, the physical strength of operators is greatly saved, and the working efficiency is improved.

Compared with other drill bits, the drill bit is light in weight, better guarantees are provided for field operators in the aspects of portability, practicability and the like, the problems that the detector is not normally embedded and is slow in speed are solved, and the integrity of the detector is provided.

Claims (2)

1. The soil drilling drill bit is characterized by comprising cutter rings, guide rings, soil gathering rings and a drill barrel, wherein a connector is arranged on the upper side of the drill barrel, cutter blades are arranged on the lower portion of the drill barrel and symmetrically arranged on two sides of the drill barrel, the angle of the drill barrel corresponding to an arc is 90 degrees, the lower ends of the cutter blades are connected with the cutter rings, the cutter rings are of a spiral structure, the cutter rings are arranged on two sides of the drill barrel in a central symmetrical structure, the guide rings are arranged between the cutter blades on the two sides, and the guide rings are of a spiral structure.

2. The earth boring drill bit as claimed in claim 1, wherein the inner side of the blade is connected with a soil gathering ring, the soil gathering ring is of a spiral structure, and the spiral directions of the blade ring, the guide ring and the soil gathering ring are the same.

Images