CN219472025U - Percussion drill bit for drilling in high-strength bare rock stratum - Google Patents

Abstract

The utility model provides a percussion drill bit for drilling in a high-strength bare rock stratum, which belongs to the technical field of rock drilling equipment and comprises a hammer body and a plurality of hammer claws, wherein the hammer claws are uniformly distributed on the circumference of a cutting end of the hammer body, a slurry discharge port is arranged between two adjacent hammer claws, the cutting ends of the hammer body and the hammer claws are respectively provided with a hammer tooth, each hammer tooth comprises an inner ring hammer tooth and a plurality of outer ring hammer teeth, the height of each inner ring hammer tooth is smaller than that of each outer ring hammer tooth, each inner ring hammer tooth is positioned at the central position of the bottom of the hammer body and is integrally formed with the hammer body, the outer ring hammer teeth are uniformly arranged at the bottom ends of the hammer claws, the outer ring hammer teeth are combined to form a circle, and the upper end of the hammer body is connected with a steel wire rope. The impact drill bit for drilling the high-strength bare rock stratum solves the technical problem of low drilling efficiency when the impact drill bit is used for drilling the high-strength bare rock stratum, and has the advantages of drilling in the high-strength bare rock stratum, improving the working efficiency, being not influenced by geological conditions, improving the construction efficiency and saving the cost.

Description

Percussion drill bit for drilling in high-strength bare rock stratum

Technical Field

The utility model belongs to the technical field of rock drilling equipment, and particularly relates to a percussion drill bit for drilling in a high-strength bare rock stratum.

Background

The lake bottom of a certain lake area has complex geological conditions, the rock stratum is granite, the texture is hard (up to 120.7 MPa), partial area sludge, clay and other covering layers are fewer, and the problems that the rock is higher than the lake bottom and the rock inclination angle is larger exist. When a trestle and a platform are erected, a steel pipe pile in the region is simply vibrated by a vibrating hammer, and the steel pipe cannot enter a required position. If the impact drill is used for drilling construction, the technical requirement that the drill enters hard rock at least 1 meter, the aperture is 630cm, but the drilling efficiency is very low under the influence of geological conditions, and the existing impact drill bit is required to be improved to be suitable for the drilling construction under the geological conditions in order to improve the construction efficiency and save the cost.

Disclosure of Invention

The utility model aims to provide a percussion drill bit for drilling a high-strength bare rock stratum, and aims to solve the technical problem of low drilling efficiency when the percussion drill bit is used for drilling the high-strength bare rock stratum.

In order to achieve the above purpose, the utility model adopts the following technical scheme: the utility model provides a strike and bore drill bit at high strength bare rock stratum drilling, including hammer body and a plurality of hammer claw, a plurality of hammer claw evenly distributed in the cutting end circumference of hammer body is provided with the mud discharge port between two adjacent hammer claw, the cutting end of hammer body and hammer claw all is provided with the hammer tooth, the hammer tooth includes inner circle hammer tooth and a plurality of outer lane hammer tooth, the height of inner circle hammer tooth is less than the height of outer lane hammer tooth, the inner circle hammer tooth is located hammer body bottom central point put and with hammer body integrated into one piece forms, a plurality of outer lane hammer tooth evenly locates a plurality of hammer claw bottom, a plurality of outer lane hammer tooth combination forms circularly, the hammer body upper end is connected with wire rope.

In one possible implementation manner, a chip removing plate is fixedly connected to the bottom of the hammer body, and the chip removing plate is used for stirring rock fragments cut by the hammer teeth to move from inside to outside along the radial direction of the hammer body during the rotary drilling process of the hammer body.

In one possible implementation, the chip plate is a plurality of chip plates and is combined to form a circle, and the chip plates are arranged around the inner ring hammer teeth.

In one possible implementation, the chip plate has an arcuate configuration and is positioned between the inner ring of hammers and the outer ring of hammers.

In one possible implementation, the height of the chip plate is less than the height of the inner ring hammer teeth.

In one possible implementation manner, the inside water passing hole that is provided with of hammer body, hammer body upper end is provided with rotary joint, wear to be equipped with the water pipe in the water passing hole, water pipe upper end intercommunication rotary joint lower extreme, lower extreme stretch out water passing hole lower extreme, the rotary joint upper end is used for connecting the one end of delivery pipe, the delivery pipe other end is used for communicating pump water subassembly, pump water subassembly is used for through the delivery pipe to pump water in the water pipe, and then towards hammer body below stratum spray water.

In one possible implementation, the length of the lower end of the water pipe extending out of the water passing hole is smaller than the height of the inner ring hammer teeth.

In one possible implementation, a plurality of PDC cutters are fixedly connected to the outer circumferential wall of the hammer body.

In one possible implementation, the inner ring hammer tooth and the outer ring hammer tooth are polygonal columns, and the outer ring hammer tooth is welded with the hammer claw.

In one possible implementation, the height of the inner ring of hammers is 3-10cm less than the height of the outer ring of hammers.

The impact drill bit for drilling in the high-strength bare rock stratum has the beneficial effects that: compared with the prior art, the impact drill bit for drilling in the high-strength bare rock stratum comprises the hammer body and the plurality of hammer claws, the plurality of hammer claws are uniformly distributed in the circumferential direction of the cutting end of the hammer body, the slurry discharge ports are arranged between two adjacent hammer claws, the hammer body and the cutting end of the hammer claw are both provided with the hammer teeth, each hammer tooth comprises an inner ring hammer tooth and a plurality of outer ring hammer teeth, the height of the inner ring hammer teeth is smaller than that of the outer ring hammer teeth, the inner ring hammer teeth are positioned at the center of the bottom of the hammer body and are integrally formed with the hammer body, the plurality of outer ring hammer teeth are uniformly arranged at the bottom ends of the plurality of hammer claws, the plurality of outer ring hammer teeth are combined to form a circle, and the upper end of the hammer body is connected with a steel wire rope.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments or the description of the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of a percussion drill bit for drilling in high strength bare rock formations according to an embodiment of the present utility model;

fig. 2 is a schematic view showing a bottom view of a percussion drill bit for drilling in a high-strength bare rock formation according to an embodiment of the present utility model (arrows indicate the rotation direction of the hammer body).

Reference numerals illustrate:

1. a hammer body; 2. a hammer claw; 3. hammer teeth; 31. inner ring hammer teeth; 32. outer ring hammer teeth; 4. a wire rope; 5. a chip removal plate; 6. a water passing hole; 7. a rotary joint; 8. a water pipe; 9. a water supply pipe; 10. PDC cutting teeth; 11. bare rock formation.

Detailed Description

In order to make the technical problems, technical schemes and beneficial effects to be solved more clear, the utility model is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.

Referring to fig. 1 to 2, a percussion drill bit for drilling in high strength bare rock formations according to the present utility model will now be described. The impact drill bit for drilling in the high-strength bare rock stratum comprises a hammer body 1 and a plurality of hammer claws 2, wherein the hammer claws 2 are uniformly distributed on the circumference of the cutting end of the hammer body 1, a slurry discharge port is arranged between two adjacent hammer claws 2, the cutting ends of the hammer body 1 and the hammer claws 2 are provided with hammer teeth 3, each hammer tooth 3 comprises an inner ring hammer tooth 31 and a plurality of outer ring hammer teeth 32, the height of each inner ring hammer tooth 31 is smaller than that of each outer ring hammer tooth 32, each inner ring hammer tooth 31 is located at the central position of the bottom of the hammer body 1 and is integrally formed with the hammer body 1, the outer ring hammer teeth 32 are uniformly arranged at the bottom ends of the hammer claws 2, the outer ring hammer teeth 32 are combined to form a circle, and the upper end of the hammer body 1 is connected with a steel wire rope 4.

Compared with the prior art, the impact drill bit for drilling the high-strength bare rock stratum can drill the high-strength bare rock stratum by arranging the inner ring hammer teeth 31 and the outer ring hammer teeth 32 with different heights, solves the technical problem of low drilling efficiency when the impact drill bit is used for drilling the high-strength bare rock stratum, has the advantages of drilling when the impact drill bit is used for drilling the high-strength bare rock stratum, improving the working efficiency, being free from the influence of geological conditions, improving the construction efficiency and saving the cost.

One or more inner ring hammers 31 may be provided, and when a plurality of hammers are provided, the inner ring hammers 31 are rounded to form a small circle, while the outer ring hammers 32 are formed into a large circle, and the two circles are concentrically arranged. The problem that the impact hole forming speed is slow can be solved by arranging the inner ring hammer teeth 31 and the outer ring hammer teeth 32 in the embodiment, the destructive power of the drill bit is enhanced through reasonable improvement of the drill bit in the prior art, so that the rock stratum is damaged by local first, the integrity of bedrock is damaged, then the rock damage of the full section is quickened, the original hole forming speed is greatly improved, and the engineering construction period is shortened. By changing the arrangement of the hammer teeth 3 of the drill bit from flat layers to staggered arrangement inside and outside, the height of the hammer teeth 31 of the inner ring and the height of the hammer teeth 32 of the outer ring are different, so that the hammer body 1 has a circular cutting effect when being contacted with a rock surface, the local stress is more than doubled compared with that of a common percussion drill bit, the destructive power of the drill bit is enhanced, and the utility model can effectively save the investment of manpower, materials and mechanical equipment and increase the benefit.

The broken line below the hammer body 1 in fig. 1 represents the bare rock formation. In actual operation, once the drill bit forms a larger plane at the inclined bare rock position, the impact weight and the impact speed of the hammer head can be increased, so that the hole forming speed is greatly improved. Compared with the prior impact drill bit, the work efficiency of the drill bit is improved by 3 times, the pore-forming period of the prior drill bit is 5-7 days, and the pore-forming period of the drill bit is only 2 days. The efficiency is improved, meanwhile, the damage of the hammer teeth 3 and the welding replacement frequency can be effectively reduced, and the effective working time is prolonged. In practical application, only 3 four original hammer teeth are needed, 8 edge teeth can be welded after cutting, and 5 holes can be continuously formed, so that the effect is remarkable.

Economic benefit: 2 days after improvement, 8 workers and 2160 yuan of cost are required; the total of the four hammer teeth and the welding rod 2 is 650 yuan, and 5 holes can be formed; the cost of a single hole is less than 2500 yuan, the production value of the single hole is 13000 yuan, the labor cost is high for two times of 1 hole welding hammer teeth of the drill bit before improvement, and compared with the labor cost, the economic benefit is remarkable after improvement.

In conclusion, the improved high-efficiency impact drilling bit for pile foundation impact hole forming construction has great practical value, successfully achieves the expected purpose and has reference value in the technical field of drilling bits.

In some embodiments, referring to fig. 1 to 2, a chip plate 5 is fixedly connected to the bottom of the hammer body 1, and during the rotary drilling process of the hammer body 1, the chip plate 5 is used to stir the rock fragments cut by the hammer teeth 3 to move from inside to outside along the radial direction of the hammer body 1. The chip removing plate 5 can stir and discharge rock scraps located between the rock stratum and the hammer body 1 in the drilling process, so that the cut rock or the cut rock scraps are discharged from the rock, the damage of the hammer teeth 3 to the rock scraps again can be reduced, the hammer teeth 3 can cut and drill the rock stratum or the rock only, and the working efficiency and the progress of drilling of the hammer teeth 3 can be improved.

In some embodiments, referring to fig. 1-2, the chip plate 5 is a plurality and is formed in a circular shape and disposed around the inner ring teeth 31. In the drilling process of the hammer teeth 3, the chip removal plate 5 does not influence the normal drilling of the hammer body 1, and the drilling or cutting efficiency of the hammer teeth 3 and the like. The function and effect of the hammer body 1 can be further improved by the provision of the hammer teeth 3.

In some embodiments, referring to fig. 1-2, the chip plate 5 has an arcuate configuration and is positioned between the inner ring of teeth 31 and the outer ring of teeth 32. The arc-shaped protrusion of the chip plate 5 has one end facing away from the rotation direction of the hammer body 1 or opposite to the rotation direction, as seen in the rotation direction of the hammer body 1, so that it is possible to form a surrounding of the chips, to peel off or stir or push the chips from the rock or rock layer, and to move the chips away from the end of the hammer body 1, without affecting the drilling of the teeth 3 (particularly the inner ring teeth 31).

In order that the chip plate 5 does not interfere with the normal rotary drilling of the hammer body 1, in some embodiments, referring to fig. 1-2, the chip plate 5 has a height that is less than the height of the inner ring teeth 31.

Preferably, the height of the chip plate 5 is half of the height of the inner ring hammer teeth 31, and the chip plate 5 is made of high-strength wear-resistant materials.

In order to spray water to a rock stratum or rock being drilled in the drilling process, frictional resistance between the hammer teeth 3 and the rock stratum is reduced, in some embodiments, please refer to fig. 1 to 2, a water passing hole 6 is formed in the hammer body 1, a rotary joint 7 is arranged at the upper end of the hammer body 1, a water pipe 8 penetrates through the water passing hole 6, the upper end of the water pipe 8 is communicated with the lower end of the rotary joint 7, the lower end of the water pipe extends out of the lower end of the water passing hole 6, the upper end of the rotary joint 7 is used for being connected with one end of a water supply pipe 9, the other end of the water supply pipe 9 is used for being communicated with a water pumping component (not shown in the drawings), and the water pumping component is used for pumping water into the water pipe 8 through the water supply pipe 9 so as to spray water towards the rock stratum below the hammer body 1. The effect of spraying water to rock stratum or rock is similar to that of a drilling machine used for drilling holes on a wall in daily life, and the operation mode of spraying water or showering water is matched, so that the drill bit and the wall can be prevented from being directly rubbed, the friction force in the rotary drilling process is reduced, and the drilling speed and the drilling efficiency are improved. The action of spraying water into the gap between the hammer tooth 3 and the rock or rock stratum in the embodiment is similar to the above action, so that the drilling efficiency of the hammer tooth 3 can be improved. The swivel joint 7 is a prior art product enabling a flow of fluid during rotation.

Specifically, since the hammer body 1 is always in the rotation process, in order to prevent the water pipe 8 from rotating or deforming, and to influence the water delivery, the rotary joint 7 is provided, and the rotary joint 7 can realize the relative rotation between the water supply pipe 9 and the water pipe 8, so that the water is delivered well. The rotary joint 7 is installed in the middle of the upper end of the hammer body 1, in fig. 1, the rotary joint 7 is located at the central position of the upper end, and the steel wire rope 4 is located at a position close to the rotary joint 7, so that the normal use of the steel wire rope 4 is not affected. The lower end of the water pipe 8 can be arranged inside the water passing hole 6, so that the discharge of water flow is not influenced, and rocks, fragments and the like can not enter the water passing hole 6 in the rotary drilling process. Or a filter screen is connected with the hammer body 1 at the lower end of the water passing hole 6, so that rock scraps and the like can be prevented from entering the water passing hole 6.

Because the inner ring hammer teeth 31 are disposed at the center of the bottom end of the hammer body 1, the water passing holes 6 in this embodiment are disposed between the chip plate 5 and the inner ring hammer teeth 31, and the number of the water passing holes may be one or more, so that the output of the water flow is not affected. The water supply pipe 9 and the water pumping assembly in this embodiment are both environmental elements, and are external devices of the hammer body 1, which are not within the scope of protection of this application. The shape, layout path, etc. of the water passing holes 6 are not limited in this embodiment.

To prevent friction of the water pipe 8 by rock formation, rock or rock dust, etc., in some embodiments, referring to fig. 1 to 2, the length of the lower end of the water pipe 8 extending out of the water hole 6 is smaller than the height of the inner ring hammer teeth 31. Preferably, the lower end of the water pipe 8 is not exposed to the water passing hole 6, so that the water pipe 8 is not damaged during the rotary drilling process.

To further expand the drilling effect of the hammer body 1 on the rock formation, in some embodiments, referring to fig. 1 to 2, a plurality of PDC cutters 10 are fixedly connected to the outer circumferential wall of the hammer body 1. Because the longitudinal section of the hammer body 1 is approximately in a trapezoid structure, the PDC cutting teeth 10 are arranged at the waist position or a position slightly below the trapezoid, and can be arranged in the circumferential direction, one or more circles can be arranged, and two circles are arranged in the embodiment. One circle can be four or six, and six circles are arranged in the embodiment. The PDC cutter 10 in this embodiment is a PDC cutter 10 used on a PDC drill bit, and has good wear resistance and impact resistance.

To increase the drilling efficiency of the hammer teeth 3, there is a large impact force with the rock or rock strata, and in some embodiments, referring to fig. 1 to 2, the inner ring hammer teeth 31 and the outer ring hammer teeth 32 are polygonal columns, and the outer ring hammer teeth 32 are welded with the hammer claw 2. For example, the hammer can be a hexagonal cylinder, and the upper ends of the inner ring hammer teeth 31 and the outer ring hammer teeth 32 are fixedly connected with the hammer body 1 or the hammer claw 2 when seen from the height direction of the hammer body 1, and the hammer teeth 3 are arranged vertically.

In some embodiments, referring to fig. 1-2, the height of the inner ring of teeth 31 is 3-10cm less than the height of the outer ring of teeth 32.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.

Claims (10)

1. The utility model provides a percussion drill bit at high strength bare rock stratum drilling, its characterized in that includes hammer body and a plurality of hammer claw, a plurality of hammer claw evenly distributed in the cutting end circumference of hammer body is provided with the mud discharge port between two adjacent hammer claw, the cutting end of hammer body and hammer claw all is provided with the hammer tooth, the hammer tooth includes inner circle hammer tooth and a plurality of outer lane hammer tooth, the height of inner circle hammer tooth is less than the height of outer lane hammer tooth, the inner circle hammer tooth is located hammer body bottom central point puts and with hammer body integrated into one piece forms, a plurality of outer lane hammer tooth evenly locates a plurality of hammer claw bottoms, a plurality of outer lane hammer tooth combination forms circularly, the hammer body upper end is connected with wire rope.

2. The percussion drill bit for drilling in high strength bare rock formations according to claim 1, wherein a chip plate is fixedly connected to the bottom of the hammer body, and the chip plate is adapted to move chips cut by the teeth radially from inside to outside along the hammer body during rotary drilling of the hammer body.

3. A percussion drill bit for drilling in high strength bare rock formations according to claim 2, wherein the chip plates are plural and are combined to form a circle, disposed around the inner ring hammer.

4. A percussion drill bit for drilling in high strength bare rock formations according to claim 2, wherein the chip plate is arcuate in configuration between the inner and outer ring hammers.

5. A percussion drill bit for drilling in high strength bare rock formations according to claim 2, wherein the chip plate has a height less than the height of the inner ring hammer.

6. The percussion drill bit for drilling in high-strength bare rock stratum according to claim 1, wherein a water passing hole is formed in the hammer body, a rotary joint is arranged at the upper end of the hammer body, a water pipe is arranged in the water passing hole in a penetrating manner, the upper end of the water pipe is communicated with the lower end of the rotary joint, the lower end of the water pipe extends out of the lower end of the water passing hole, the upper end of the rotary joint is used for being connected with one end of a water supply pipe, the other end of the water supply pipe is used for being communicated with a water pumping assembly, and the water pumping assembly is used for pumping water into the water pipe through the water supply pipe and spraying water towards a stratum below the hammer body.

7. The percussion drill bit for drilling in high strength bare rock formations according to claim 6, wherein the length of the lower end of the water tube extending beyond the water passing hole is less than the height of the inner ring hammer.

8. The percussion drill bit for drilling in high strength bare rock formations according to claim 1, wherein a plurality of PDC cutters are fixedly attached to the outer circumferential wall of the hammer body.

9. The percussion drill bit for drilling in high strength bare rock formations according to claim 1, wherein the inner ring and outer ring of hammer teeth are polygonal cylinders, and the outer ring of hammer teeth is welded to the hammer claw.

10. A percussion drill bit for drilling in high strength bare rock formations according to claim 1, wherein the inner ring of teeth has a height 3-10cm less than the outer ring of teeth.