CN213953514U

CN213953514U - Composite sheet bearing high-pressure rotary jet drill bit

Info

Publication number: CN213953514U
Application number: CN202023184861.XU
Authority: CN
Inventors: 史彦
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-12-25
Filing date: 2020-12-25
Publication date: 2021-08-13
Anticipated expiration: 2030-12-25

Abstract

The utility model discloses a composite sheet bearing high-pressure rotary jet drill bit, which comprises a drill rod body and a drill bit body; the drill rod body is of a shaft-shaped structure; the bottom of the drill rod body is fixed with a connecting block, and the drill rod body and the connecting block are integrally cast and formed; and a rotary spraying water delivery channel is formed in the center of the interior of the drill rod body. The utility model has the advantages of simple and reasonable structure, adopt and spout compound high pressure cutter head soon, the setting of front end nozzle on the drill bit body, can spout the cutting soon of position department that creeps into, the first cutting tool head of deuterogamying and second cutting tool head use, first cutting tool head cuts the outer lane of position department that creeps into, the second cutting tool head cuts the inner circle of position department that creeps into, cutting rate and effect when having improved drilling, the setting of drilling rod body outside side direction nozzle and front end nozzle, adopt coaxial decentraction's cutting nozzle technology, can carry out the high-pressure jet cutting to drilling lateral wall and drill bit front end simultaneously, the effect of high-pressure jet has been improved.

Description

Composite sheet bearing high-pressure rotary jet drill bit

Technical Field

The utility model relates to a spout drilling tool equipment technical field soon, in particular to compound piece bearing high pressure jet drill bit.

Background

In recent years, with the great expansion of national basic construction projects, the construction scale of railways, highways, airports, wharfs and high-rise buildings is continuously expanded, the quality requirements on foundation treatment, foundation pit support and foundation pit water stop are continuously improved, and as the technology of the jet grouting pile, the jet grouting pile has the advantages of simple equipment, convenience in construction, high speed, material saving, high efficiency, low cost, simplicity in operation, wide application range and the like, and is widely applied to many foundation construction fields. The rotary jet drilling machine is special equipment for rotary jet pile construction operation, and is used for carrying out rotary jet grouting on medium such as slurry, compressed air, clear water and the like under the high-pressure working condition in cooperation with a drilling tool. The rotary jet drill bit is a key component in a rotary jet drilling machine, and can extend into the stratum to drill and can spray slurry on the other hand. The existing rotary spraying drill bit is low in drilling speed, the existing drill bit is only sprayed with water through the bottom end in the using process, and the drill bit is taken out due to the fact that holes are narrow and small, and the drill bit is influenced to be taken out.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model provides a relate to jet grouting drilling tool equipment technical field, adopt to spout compound high pressure cutting tool bit soon, improved drill bit cutting effect, and through the cutting nozzle of coaxial decentraction, can carry out high pressure jet grouting to the lateral wall and the tip of drilling simultaneously, conveniently the lateral wall that drills goes on and expand the drill bit bottom, solved that drilling rate is slow and the drill bit takes out inconvenient problem.

In order to achieve the above purpose, the technical scheme of the utility model is as follows: the composite sheet bearing high-pressure rotary jet drill bit comprises a drill rod body and a drill bit body; the drill rod body is of a shaft-shaped structure; the bottom of the drill rod body is fixed with a connecting block, and the drill rod body and the connecting block are integrally cast and formed; a rotary spraying water delivery channel is formed in the center of the interior of the drill rod body, and the bottom end of the rotary spraying water delivery channel penetrates through the connecting block; the top end of the drill rod body is provided with a conical interface, and the bottom of the conical interface is communicated with the rotary spraying water delivery channel; lateral nozzles are symmetrically arranged at the bottom of the outer side of the drill rod body and communicated with the rotary spraying water delivery channel; a drill bit body is arranged below the drill rod body; the top of the drill bit body is provided with an installation groove matched with the connecting block; a front-end water delivery channel is vertically arranged in the drill bit body; the top end of the front-end water delivery channel is communicated with the inside of the mounting groove; the front end water delivery channel is positioned on the outer side of the bottom of the mounting groove; the front water delivery channel is communicated with the rotary spraying water delivery channel, and first cutting tool bits are uniformly fixed on the outer side of the bottom of the drill bit body; the first cutting tool bits are arranged in an annular array by taking the circle center of the bottom end of the drill bit body as an axis; a second cutting tool bit is fixed on one side of the bottom of the drill bit body, and a front-end nozzle is arranged on the other side of the bottom of the drill bit body; the height of the first cutting head is greater than that of the second cutting head; the bottom end of the front-end water delivery channel is communicated with the front-end nozzle.

As a preferred scheme of the utility model, first cutting knife head is provided with three groups, and the distance between the adjacent first cutting knife head is the same.

As a preferred scheme of the utility model, threaded connection between connecting block and the mounting groove, and the outside of connecting block and the inboard of mounting groove all are provided with the screw thread.

As an optimized scheme of the utility model, the outside cover of drilling rod body is equipped with the bearing housing, and set up on the drilling rod body with the spacing draw-in groove of bearing housing complex.

As a preferred scheme of the utility model, the outside of drilling rod body, drill bit body, first cutter head and second cutter head all coats and has the wear-resistant coating.

As a preferred scheme of the utility model, wear-resisting coating is nickel titanium alloy coating, and nickel titanium alloy coating's thickness is 1 mm.

In combination with the above technical scheme, the utility model discloses following beneficial effect has: the utility model has simple and reasonable structure, adopts the rotary spraying composite high-pressure cutting tool bit, the arrangement of the front end nozzle on the drill bit body can carry out rotary spraying cutting on the drilling position, and then the first cutting tool bit and the second cutting tool bit are matched for use, the first cutting tool bit carries out cutting on the outer ring of the drilling position, the second cutting tool bit carries out cutting on the inner ring of the drilling position, the cutting speed and the effect during drilling are improved, the lateral nozzle outside the drill rod body and the front end nozzle are arranged, the coaxial and non-concentric cutting nozzle process is adopted, high-pressure spraying cutting can be carried out on the drilling side wall and the drill bit front end simultaneously, the high-pressure rotary spraying effect is improved, in addition, the nickel-titanium alloy metal coating coated on the surfaces of the drill rod body, the drill bit body and the cutting tool bit is utilized, the high-strength wear-resistant, corrosion-resistant, high-damping and super-elastic characteristics are formed, the service life is longer.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a front sectional view of the present invention;

FIG. 2 is a structural view of the drill rod body of the present invention;

FIG. 3 is a view of the structure of the drill body of the present invention;

fig. 4 is a schematic view of the bearing housing of the present invention.

The corresponding part names indicated by the numbers and letters in the drawings:

1. drill rod body 2, connecting block 3, rotary spraying water delivery channel

4. Conical interface 5, lateral nozzle 6, bearing sleeve

7. Limiting clamping groove 8, drill bit body 9 and mounting groove

10. Front end water delivery channel 11, front end nozzle 12, first cutting knife head

13. A second cutting bit.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Examples

With reference to fig. 1-4, the utility model discloses a composite sheet bearing high pressure jet drill bit, including drilling rod body 1 and drill bit body 8. The drill rod body 1 is in a shaft-shaped structure. The bottom of drilling rod body 1 is fixed with connecting block 2, and drilling rod body 1 and the integrative casting shaping of connecting block 2. The stability between the drill rod body 1 and the connecting block 2 is reinforced. The center position department of drilling rod body 1 inside has seted up and has spouted water delivery passageway 3 soon, and spouts water delivery passageway 3's bottom through connection piece 2 soon. The top end of the drill rod body 1 is provided with a conical connector 4, and the bottom of the conical connector 4 is communicated with the rotary spraying water delivery channel 3. Lateral nozzles 5 are symmetrically arranged at the bottom of the outer side of the drill rod body 1, and the lateral nozzles 5 are communicated with the rotary spraying water delivery channel 3. The high-pressure water spray enters the water delivery channel 3 and is discharged from the lateral nozzles 5, and the high-pressure water spray expansion is carried out on the outer wall of the drilled hole. A drill bit body 8 is arranged below the drill rod body 1. The top of the drill bit body 8 is provided with a mounting groove 9 matched with the connecting block 2. The interior of the bit body 8 is vertically provided with a front end water delivery passage 10. The top end of the front end water delivery channel 10 is communicated with the inside of the mounting groove 9. The front water delivery channel 10 is positioned outside the bottom of the mounting groove 9. The front end water delivery channel 10 is communicated with the rotary spraying water delivery channel 3, and the outer side of the bottom of the drill bit body 8 is uniformly fixed with a first cutting tool bit 12. The first cutting bits 12 are arranged in an annular array with the center of the circle at the bottom end of the bit body 8 as the axis. A second cutter head 13 is fixed on one side of the bottom of the drill body 8, and a front end nozzle 11 is arranged on the other side of the bottom of the drill body 8. The front end nozzle 11 is located at a position deviated from the center of the bottom end of the drill bit body 8, so that the front end nozzle 11 performs annular injection during the rotation of the drill bit. The height of the first cutting tip 12 is greater than the height of the second cutting tip 13. The first cutting head 12 cuts the outer ring of the bottom end of the drill body 8, and the second cutting head 13 cuts the inner ring of the bottom end of the drill body 8. The bottom end of the front water delivery passage 10 communicates with a front nozzle 11.

In order to improve the drilling effect, the first cutting bits 12 are provided with three groups, and the distances between adjacent first cutting bits 12 are the same, so that the drilling speed is improved by the multiple groups of first cutting bits 12.

For convenient to carry out quick replacement and installation to drilling rod body 1 and drill bit body 8, threaded connection between connecting block 2 and the mounting groove 9, and the outside of connecting block 2 and the inboard of mounting groove 9 all are provided with the screw thread, through the roman in the connecting block 2 outside and the inside screw fit of mounting groove 9, screw up fast between drilling rod body 1 and the drill bit body 8 and be connected.

For being connected between convenient utility model and the equipment, the outside cover of drilling rod body 1 is equipped with bearing housing 6, and drilling rod body 1 is last seted up with bearing housing 6 complex spacing draw-in groove 7, fixes a position drilling rod body 1 through bearing housing 6.

In order to improve the utility model discloses a life, the outside of drilling rod body 1, drill bit body 8, first cutter head 12 and second cutter head 13 all has the coating to have wear-resistant coating. Preferably, the wear-resistant coating is a nickel titanium alloy coating, and the thickness of the nickel titanium alloy coating is 1 mm.

Through the above-mentioned specific embodiment, the beneficial effects of the utility model are that: the utility model has the advantages of simple and reasonable structure, adopt and spout compound high pressure cutter head soon, the setting of front end nozzle 11 on the drill bit body 8, can be to the cutting of spouting soon of position department that creeps into, deuterogamy first cutter head 12 and second cutter head 13 and use, first cutter head 12 cuts the outer lane of position department that creeps into, second cutter head 13 cuts the inner circle of position department that creeps into, cutting rate and effect when having improved drilling, the setting of drilling rod body 1 outside side direction nozzle 5 and front end nozzle 11, adopt coaxial decentraction's cutting nozzle technology, can carry out high-pressure jet cutting to drilling lateral wall and drill bit front end simultaneously, the effect of high-pressure jet has been improved, in addition, utilize drilling rod body 1, drill bit body 8 and the nickel titanium alloy metal coating of cutting head surface coating, wear-resisting, corrosion-resistant of high strength is formed, High damping and super elasticity, and long service life.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. The composite sheet bearing high-pressure rotary jet drill bit is characterized by comprising a drill rod body and a drill bit body; the drill rod body is of a shaft-shaped structure; the bottom of the drill rod body is fixed with a connecting block, and the drill rod body and the connecting block are integrally cast and formed; a rotary spraying water delivery channel is formed in the center of the interior of the drill rod body, and the bottom end of the rotary spraying water delivery channel penetrates through the connecting block; the top end of the drill rod body is provided with a conical interface, and the bottom of the conical interface is communicated with the rotary spraying water delivery channel; lateral nozzles are symmetrically arranged at the bottom of the outer side of the drill rod body and communicated with the rotary spraying water delivery channel; a drill bit body is arranged below the drill rod body; the top of the drill bit body is provided with an installation groove matched with the connecting block; a front-end water delivery channel is vertically arranged in the drill bit body; the top end of the front-end water delivery channel is communicated with the inside of the mounting groove; the front end water delivery channel is positioned on the outer side of the bottom of the mounting groove; the front water delivery channel is communicated with the rotary spraying water delivery channel, and first cutting tool bits are uniformly fixed on the outer side of the bottom of the drill bit body; the first cutting tool bits are arranged in an annular array by taking the circle center of the bottom end of the drill bit body as an axis; a second cutting tool bit is fixed on one side of the bottom of the drill bit body, and a front-end nozzle is arranged on the other side of the bottom of the drill bit body; the height of the first cutting head is greater than that of the second cutting head; the bottom end of the front-end water delivery channel is communicated with the front-end nozzle.

2. The composite sheet bearing high pressure jet rotary drill bit as claimed in claim 1, wherein the first cutter heads are provided in three sets, and the distances between adjacent first cutter heads are the same.

3. The composite sheet bearing high-pressure jet drill bit according to claim 1, wherein the connecting block is in threaded connection with the mounting groove, and threads are arranged on the outer side of the connecting block and the inner side of the mounting groove.

4. The composite sheet bearing high-pressure jet drill bit according to claim 1, wherein a bearing sleeve is sleeved on the outer side of the drill rod body, and a limiting clamping groove matched with the bearing sleeve is formed in the drill rod body.

5. The composite sheet bearing high pressure jet drill bit of claim 1, wherein the drill stem body, the first cutting bit of the drill bit body and the second cutting bit are coated on the outside with a wear resistant coating.

6. The composite sheet bearing high pressure jet drill bit of claim 5, wherein the wear resistant coating is a nickel titanium alloy coating and the thickness of the nickel titanium alloy coating is 1 mm.