CN214303705U

CN214303705U - Equal-thickness high-spraying anti-seepage wall drill bit

Info

Publication number: CN214303705U
Application number: CN202022660372.0U
Authority: CN
Inventors: 谢为江
Original assignee: JIANGXI PROVINCE WATER CONSERVANCY SCIENCE RESEARCH INSTITUTE
Current assignee: JIANGXI PROVINCE WATER CONSERVANCY SCIENCE RESEARCH INSTITUTE
Priority date: 2020-11-17
Filing date: 2020-11-17
Publication date: 2021-09-28
Anticipated expiration: 2030-11-17

Abstract

The utility model discloses an equal-thickness high-pressure-jetting anti-seepage wall drill bit, which comprises a drill body, a high-pressure air nozzle, a high-pressure cement slurry spray pipe, a drill handle, a high-pressure air spray pipe and a cutting tooth, wherein the lower end of the drill handle is fixedly connected with the drill body, and the bottom end of the drill body is fixedly connected with the cutting tooth; the drill handle is of a hollow structure, the middles of the front side and the rear side of the drill body are respectively provided with a high-pressure air nozzle, and the front high-pressure air nozzle and the rear high-pressure air nozzle are communicated and are commonly connected with a high-pressure air spray pipe; the front side and the rear side of the drill body are respectively provided with a pair of high-pressure cement slurry nozzles, the front high-pressure air nozzle and the rear high-pressure air nozzle are communicated and connected with the high-pressure cement slurry spray pipe, and the high-pressure cement slurry nozzles are slightly lower than the high-pressure air nozzles. The utility model discloses can realize the efflux tied in a bundle, overcome the defect in the background art, can increase spray regime, overlap joint length between the extension width of cloth forms the high impervious wall that spouts of approximate uniform thickness. The construction quality of the impervious wall is improved, and the construction cost is greatly saved.

Description

Equal-thickness high-spraying anti-seepage wall drill bit

Technical Field

The utility model relates to a high sprinkling grouting equipment technical field especially relates to the equal thickness height spouts cut-off wall drill bit.

Background

The high-pressure jet process has been widely applied since the introduction of China in the seventies of the last century, and has formed the industrial standard 'technical specification for high-pressure jet grouting of hydropower and water conservancy projects'; the high-spraying method has the advantages of wide stratum application range, low manufacturing cost, mature process and the like, and has wide application prospect in dams with complicated geological conditions and severe construction environments. In the prior art, a high-pressure jet drill bit (shown in figures 1-3) adopts a middle high-pressure cement slurry nozzle to jet slurry, an annular airflow hole is arranged on the outer ring of a slurry beam, annular airflow is jetted from the annular airflow hole, and jetted high-pressure air is arranged around the slurry beam; after the inventor realizes the problem, the high-pressure cement nozzle and the air nozzle are separately arranged (as shown in figures 4-6), a structure that an air hole is separated from the high-pressure cement nozzle is adopted, namely, the high-pressure cement nozzle is a double-hole high-pressure jet drill with separated air and cement, and the high-pressure cement nozzle and the high-pressure air jet nozzle of the improved high-pressure jet drill are separated, so that the problem that an annular airflow hole is easily blocked is solved, but when the double-hole high-pressure jet drill is used for swinging and spraying, the impervious walls formed on two sides are very thin, and the quality assurance degree of the impervious walls is low; therefore, the inventor further improves the high-pressure jet drill bit, and the high-pressure jet drill bit is arranged to be a multi-hole split drill bit, so that the cluster jet constant-pressure jet operation can be realized, and the defects are overcome. The construction cost is greatly reduced while the construction quality of the impervious wall is ensured, and the method is suitable for wide popularization.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an equal thickness height spouts cut-off wall drill bit can realize the efflux of concentrating tied in a bundle and surely spout the operation, has overcome the defect among the prior art, can form the high cut-off wall that spouts of approximate equal thickness, has both improved the cut-off wall quality, practices thrift construction cost again.

In order to achieve the above purpose, the utility model adopts the following technical scheme: the constant-thickness high-spraying anti-seepage wall drill bit comprises a drill body, a high-pressure air nozzle, a high-pressure cement spray pipe, a drill handle, a high-pressure air spray pipe and cutting teeth, wherein the lower end of the drill handle is fixedly connected with the drill body, and the bottom end of the drill body is fixedly connected with the cutting teeth; the drill handle is of a hollow structure, the middles of the front side and the rear side of the drill body are respectively provided with a high-pressure air nozzle, and the high-pressure air nozzles are communicated and fixedly connected with a high-pressure air spray pipe; the front side and the rear side of the drill body are respectively provided with two or more high-pressure cement slurry nozzles, and the high-pressure cement slurry nozzles are communicated and fixedly connected with the high-pressure cement slurry spray pipe.

Furthermore, the two high-pressure air nozzles on the front side or the rear side of the drill body are positioned close to the periphery, and the high-pressure air nozzles are positioned at the upper position in the middle of the two high-pressure cement slurry nozzles.

Furthermore, the high-pressure air nozzle on the front side of the drill body is communicated with the high-pressure air nozzle on the rear side of the drill body and is connected with a high-pressure air spray pipe.

Furthermore, the two high-pressure cement slurry nozzles are in a group, the number of the high-pressure cement slurry spray pipes is two, and the high-pressure cement slurry nozzles on the front side of the drill body are communicated with the high-pressure cement slurry nozzles on the rear side of the drill body and are connected with the high-pressure cement slurry spray pipes together.

Furthermore, the drill body is of a solid steel structure, a high-pressure air nozzle and a channel communicated with the high-pressure air spray pipe are arranged in the drill body, a high-pressure cement slurry nozzle and a channel communicated with the high-pressure cement slurry spray pipe are further arranged in the drill body, and the drill body and the drill handle are fixed in a welding mode.

Furthermore, the top of the drill handle is also provided with an internal thread, and the internal thread is in threaded connection with an external drill rod. The spiral direction of the internal thread is opposite to the rotating direction of the drill rod during working, so that the drill rod is prevented from rotating and being separated from the drill rod in the rotating process.

Furthermore, the lower end of the drill body is also provided with a stirring blade, and the stirring blade is welded outside the drill body. The stirring blades are preferably four, and are uniformly welded on the outer surface of the lower end of the rotating body.

Compared with the prior art, the utility model discloses following beneficial effect has: the equal-thickness high-pressure-jetting anti-seepage wall drill bit is improved by multiple times of reinforcement on the basis of the prior art, practice verifies that multiple pairs of high-pressure cement slurry nozzles are symmetrically arranged on the front and the back and the sides of the drill body respectively, high-speed water flow jetted from the high-pressure cement slurry nozzles cuts a stratum firstly, the width of the high-speed water flow jetted from the high-pressure cement slurry nozzles is approximate to the thickness of the anti-seepage wall, the high-pressure air nozzles play an interference role on multiple pairs of high-speed fluid jetted from the high-pressure cement slurry nozzles on the two sides, the effect of cutting the stratum close to the position of the drill body between the high-pressure cement slurry nozzles is achieved, and jetting dead angles are avoided. The stirring blade can pre-cut the stratum close to the periphery of the drill rod when the drill rod sinks and rotates, so that the stratum resistance is reduced and the spraying range is enlarged during the high-spraying operation. After drilling is finished, the cement slurry is sprayed out of the high-pressure cement slurry nozzles at the same time, the high-speed airflow plays a role in stirring, and the sprayed cement slurry is mixed with the stratum raw materials to form the high-spraying impervious wall. The constant-thickness high-spraying impervious wall drill bit can realize cluster fixed-spraying construction, form a high-spraying impervious wall with approximate constant thickness, and has the advantages of good impervious quality and low construction cost. Meanwhile, the high-pressure jet anti-seepage wall drill bit can also be applied to rotary and swing jet construction.

Drawings

FIG. 1 is a front view of a drill bit configuration for initial use in accordance with the present invention;

FIG. 2 is a left side view of the drill bit configuration of the present invention as initially used;

FIG. 3 is a cross-sectional view of the drill bit configuration of the present invention in initial use;

FIG. 4 is a front view of a first improved drill bit according to the present invention;

FIG. 5 is a left side view of a first improved drill bit according to the present invention;

FIG. 6 is a sectional view of a first improved drill of the present invention;

FIG. 7 is a front view of the structure of the present invention;

fig. 8 is a left side view of the structure of the present invention;

fig. 9 is a structural sectional view of the present invention;

fig. 10 is a schematic diagram of the operation.

In the figure: 1. drilling a body; 2. a high pressure air jet; 3. a high-pressure cement slurry nozzle; 4. a high-pressure cement slurry spray pipe; 5. a drill shank; 6. a high pressure air nozzle; 7. a cutting pick; 8. an internal thread; 9. a stirring blade.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

As shown in fig. 1-9, the equal-thickness high-pressure-jetting anti-seepage wall drill bit comprises a drill body 1, a high-pressure air nozzle 2, a high-pressure cement slurry nozzle 3, a high-pressure cement slurry spray pipe 4, a drill handle 5, a high-pressure air spray pipe 6 and a cutting tooth 7, wherein the lower end of the drill handle 5 is fixedly connected with the drill body 1, and the bottom end of the drill body 1 is fixedly connected with the cutting tooth 7; the drill handle 5 is of a hollow structure, the middle of the front side and the middle of the rear side of the drill body 1 are respectively provided with a high-pressure air nozzle 2, and the two high-pressure air nozzles 2 are communicated with and fixedly connected with the same high-pressure air spray pipe 6; the high-pressure cement paste spraying pipe is characterized in that the front side and the rear side of the drill body 1 are respectively provided with two high-pressure cement paste spraying ports 3, the two high-pressure cement paste spraying ports 3 are in a group, the number of the high-pressure cement paste spraying pipes 4 is two, and the high-pressure cement paste spraying ports 3 on the front side of the drill body and the high-pressure cement paste spraying ports 3 on the rear side of the drill body are communicated and are jointly connected with the high-pressure cement paste spraying pipes 4. The high-pressure cement paste nozzle 3 is slightly higher than the high-pressure air nozzle 2, the two high-pressure air nozzles 3 on the front side or the rear side of the drill body are located at positions close to the outside, and the high-pressure air nozzle 2 is located at a position close to the middle of the two high-pressure cement paste nozzles 3.

Wherein, the high-pressure air nozzle 2 and the high-pressure cement paste nozzle 3 respectively penetrate through the front side and the rear side of the drill body 1.

Wherein, bore body 1 is solid steel structure, interior the passageway of establishing high-pressure air spout 2 and communicating with high-pressure air spray tube 6, still set up high-pressure cement thick liquid spout 3 and the passageway of communicating with high-pressure cement thick liquid spray tube 4, it adopts welded fastening to bore body 1 and drillstock 5.

Wherein, the top of the drill handle 5 is also provided with an internal thread 8, and the internal thread 8 is in threaded connection with an external drill rod. The spiral direction of the internal thread 8 is opposite to the rotating direction of the drill rod during working, so that the separation of the rotary body 1 and the drill rod in the rotating process of the drill rod is avoided.

Wherein, the upper portion of boring body 1 still is equipped with stirring vane 9, stirring vane 9 welds in boring body 1 outside. The stirring blades 9 are preferably four pieces, and are uniformly welded on the outer surface of the upper part of the drill body 1. During the high-pressure guniting, stirring can be simultaneously carried out.

Wherein, the left and right sides of the lower part of the drill body 1 are in a sharp shape which extends smoothly and outwards. The drawing of the high-pressure air nozzle 2 and the high-pressure cement paste nozzle 3 in the drawing of the utility model does not represent the size proportion, and actually, the drawing is small holes relative to the size of the drill body 1.

The utility model discloses a when using, firstly, the equal-thickness high-pressure spray impervious wall drill bit is fixedly connected with the bottom end of a drill rod through an internal thread arranged at the top of a drill handle 5, the drill rod is of a hollow structure, and a high-pressure cement slurry spray pipe 4 and a high-pressure air spray pipe 6 are positioned inside the hollow drill rod, penetrate through the drill rod and extend to the top of the drill rod; when drilling (one, two or three drill rods can be used for simultaneously drilling holes), an external driving motor drives the drill rods to rotate, the drill rods drive the equal-thickness high-pressure-spraying impervious wall drill bit to rotate to drill holes on the ground, as shown in fig. 10, after the hole is drilled to the designed depth, the high-pressure cement slurry spray pipe 4 and the high-pressure air spray pipe 6 are connected with an external high-pressure slurry pump and an air compressor through a flow guider, the high-speed sprayed cement slurry cuts the stratum and is mixed with stratum materials to form a condensate, the condensate is further mixed by high-speed airflow, the drill rods are gradually lifted to be subjected to fixed spraying to form impervious wall panels, all adjacent wall panels are mutually overlapped, and the condensate between the adjacent wall panels is mutually fused to form the high-pressure-spraying impervious wall with the approximate equal thickness.

While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention.

Claims

1. The constant-thickness high-spraying anti-seepage wall drill bit comprises a drill body, a high-pressure air nozzle, a high-pressure cement spray pipe, a drill handle, a high-pressure air spray pipe and cutting teeth, wherein the lower end of the drill handle is fixedly connected with the drill body, and the bottom end of the drill body is fixedly connected with the cutting teeth; the method is characterized in that: the drill handle is of a hollow structure, the middles of the front side and the rear side of the drill body are respectively provided with a high-pressure air nozzle, and the high-pressure air nozzles are communicated and fixedly connected with the high-pressure air spray pipe; the front side and the rear side of the drill body are respectively provided with two or more high-pressure cement slurry nozzles, and the high-pressure cement slurry nozzles are communicated and fixedly connected with the high-pressure cement slurry spray pipe.

2. The equal-thickness high-pressure jet impervious wall drill bit according to claim 1, wherein: the two high-pressure air nozzles on the front side or the rear side of the drill body are located at positions close to the outside, and the high-pressure air nozzles are located at positions close to the middle of the two high-pressure cement slurry nozzles.

3. The equal-thickness high-pressure jet impervious wall drill bit according to claim 1, wherein: the high-pressure air nozzle on the front side of the drill body is communicated with the high-pressure air nozzle on the rear side of the drill body and is connected with a high-pressure air spray pipe.

4. The equal-thickness high-pressure jet impervious wall drill bit according to claim 1, wherein: the high-pressure cement slurry nozzles are arranged in a group, the high-pressure cement slurry spray pipes are arranged in two numbers, and the high-pressure cement slurry nozzles on the front side of the drill body are communicated with the high-pressure cement slurry nozzles on the rear side of the drill body and are connected with the high-pressure cement slurry spray pipes together.

5. The equal-thickness high-pressure jet impervious wall drill bit according to claim 1, wherein: the drill body is of a solid steel structure, a high-pressure air nozzle and a channel communicated with the high-pressure air spray pipe are arranged in the drill body, a high-pressure cement slurry nozzle and a channel communicated with the high-pressure cement slurry spray pipe are further arranged in the drill body, and the drill body and the drill handle are fixed in a welding mode.

6. The equal-thickness high-pressure jet impervious wall drill bit according to claim 1, wherein: the drill handle top still is equipped with the internal thread, internal thread and outside drilling rod threaded connection.

7. The equal-thickness high-pressure jet impervious wall drill bit according to claim 1, wherein: the drill body is characterized in that a stirring blade is further arranged on the upper portion of the drill body and welded to the outer portion of the drill body.