CN210178279U

CN210178279U - High-pressure rotary jet grouting drill bit

Info

Publication number: CN210178279U
Application number: CN201921128547.4U
Authority: CN
Inventors: Boqing Luo; 骆波清; Wei Wei; 魏伟; Liheng Tang; 汤立恒; Guixin Chen; 陈桂新; Jianbing Liu; 刘建兵
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-07-18
Filing date: 2019-07-18
Publication date: 2020-03-24
Anticipated expiration: 2029-07-18

Abstract

The utility model provides a high-pressure rotary jet grouting drill bit, which belongs to a grouting drill bit and comprises a screwed pipe, a perforated pipe and a drill bit part, wherein the screwed pipe and the perforated pipe are integrally formed, the drill bit part is connected with the end part of the perforated pipe in a threaded manner, the inner cavity of the perforated pipe is communicated with the screwed pipe, and five grouting holes are formed in the side wall of the perforated pipe; the sleeve is sleeved outside the perforated pipe, two ends of the sleeve respectively abut against the threaded pipe and the drill bit part, a first hole group and a second hole group are arranged on the side wall of the sleeve, the first hole group comprises five grout outlet holes corresponding to five positions of the grout injection holes, and the second hole group comprises three grout outlet holes corresponding to three positions of the grout injection holes; the problem of the drill bit is idle, causes the wasting of resources is solved.

Description

High-pressure rotary jet grouting drill bit

Technical Field

The utility model relates to a slip casting drill bit especially relates to a high pressure jet grouting drill bit.

Background

At present, in foundation pit or slope support engineering, an anchor cable is a common support type, and a conventional anchor cable construction mode can meet requirements for common good geological conditions; however, for the bottom layer containing the cobbles and the gravels, in order to prevent the hole collapse after the hole guiding, a high-pressure rotary jet grouting drill bit is usually used for injecting slurry into the hole, so that the supporting strength of the hole is enhanced.

The existing grouting drill bit comprises a threaded pipe and a drill bit part integrally connected with the threaded pipe, the drill bit part is hollow, and a plurality of grouting holes are formed in the outer wall of the drill bit part.

The grouting drill bit is arranged on a drill rod of the grouting machine and rotates simultaneously in the grouting process, and mud is thrown out of a grouting hole in the rotating process and is beaten in soil to be mixed with the soil to form an injection molding body with higher strength.

However, the above technical solutions have the following problems: in the excavation supporting engineering to different geology, can need the slip casting drill bit of different flow sizes to ensure that mud liquid can make full use of, need the staff to purchase the drill bit of multiple different slip casting hole numbers simultaneously from this, but only can use one of them drill bit under the majority circumstances, let other drill bits idle, cause the wasting of resources, consequently wait to improve.

Disclosure of Invention

Therefore, the utility model aims at providing a high pressure jet grouting drill bit to solve the above-mentioned drill bit that calls idle, cause the problem of wasting of resources.

The above technical purpose of the present invention can be achieved by the following technical solutions:

a high-pressure rotary jet grouting drill bit comprises a threaded pipe, a perforated pipe and a drill bit part, wherein the threaded pipe and the perforated pipe are integrally formed, the drill bit part is connected to the end part of the perforated pipe in a threaded mode, the inner cavity of the perforated pipe is communicated with the threaded pipe, and five grouting holes are formed in the side wall of the perforated pipe; the trompil pipe overcoat is equipped with the sleeve, telescopic both ends support respectively in screwed pipe and drill bit portion, first punch combination and second punch combination have been seted up to telescopic lateral wall, first punch combination includes five grout holes that correspond with five injected hole positions, the second punch combination includes three grout holes that correspond with wherein three injected hole position.

Preferably, the two ends of the sleeve are respectively a first end and a second end, when the first end abuts against the drill bit portion, the five grout outlet holes of the first hole group are respectively aligned with the five grout outlet holes, and when the second end abuts against the drill bit portion, the three grout outlet holes of the second hole group are respectively aligned with the three grout outlet holes.

By adopting the technical scheme, the worker can firstly connect the thread pipe to the drill rod of the grouting machine, then screwing the lower drill head part and taking out the sleeve, if large-displacement grouting is needed, a worker can sleeve the sleeve outside the perforated pipe along the direction that the second end is abutted to the threaded pipe, rotating the sleeve to align the five grouting holes and the five grout outlet holes, screwing the upper drill head part to ensure that the first end of the sleeve is abutted to the drill head part, and the fixing principle of the sleeve utilizes the clamping force of the threaded pipe and the drill head part to the sleeve to fix the sleeve, if small-displacement grouting is needed, a worker can sleeve the sleeve outside the perforated pipe along the direction that the first end is abutted against the threaded pipe, rotate the sleeve to align the three grouting holes and the three grout outlet holes, the other two grouting holes are resisted by the inner wall of the sleeve, and then the drill bit part is screwed up, so that the second end of the sleeve is resisted on the drill bit part. To sum up, only change the direction that the sleeve emboliaed, alright accomplish and utilize a drill bit to realize the simple and convenient switching of three injected hole and five injected holes, let the staff only need purchase a drill bit from this, just can realize the switching of two kinds of injected quantities, avoid purchasing too much drill bits, cause the drill bit to be idle, the extravagant condition of resource.

Preferably, four of the grouting holes are located at four corners of a rectangle, and the center of the rectangle is located on the axis of the perforated pipe.

Preferably, when the sleeve rotates 180 degrees along the axis of the sleeve, four grout outlet holes are respectively aligned with four grouting holes, and the rest grout outlet holes are staggered with the rest grouting holes.

Through adopting above-mentioned technical scheme, the staff can utilize the sleeve to switch five injected holes and four injected holes, has increaseed the suitability of drill bit.

Preferably, the outer wall of the end part of the perforated pipe close to the threaded pipe is provided with two positioning blocks, the two positioning blocks are symmetrical about the axis of the perforated pipe, and the inner walls of the two ends of the sleeve are provided with positioning grooves matched with the positioning blocks in an inserting mode.

Through adopting above-mentioned technical scheme, the grafting cooperation of locating piece and constant head tank can prevent that when the drill bit rotates, the sleeve takes place the offset, causes the condition of slip casting hole and play thick liquid hole dislocation.

Preferably, the positioning block is a trapezoidal block, and the positioning groove is a trapezoidal groove.

Through adopting above-mentioned technical scheme, can make things convenient for the staff to take out the sleeve from trompil pipe department.

Preferably, the aperture of the grouting hole is between 0.8 and 1.5cm, and the aperture of the grout outlet is 0.2cm larger than that of the grouting hole.

By adopting the technical scheme, slight errors can be generated in the aligning process of the grouting holes and the grout outlet holes, the grout outlet holes are slightly larger than the aperture of the grouting holes, and the influence of the errors on the grout outlet speed can be avoided.

Preferably, the aperture of the grouting hole is 1.2cm, and the aperture of the grout outlet hole is 1.4 cm.

The utility model provides a pair of high pressure jet grouting drill bit has following advantage:

1. workers can realize the switching among three grouting holes, four grouting holes and five grouting holes by using one drill bit, and idle resource waste caused by purchasing multiple drill bits is avoided;

2. the method can be realized without increasing excessive mechanical structures, and is convenient to operate.

Drawings

Fig. 1 is a schematic structural view of the present invention;

fig. 2 is an exploded schematic view of the present invention;

FIG. 3 is a perspective cross-sectional view of the first hole set of the present invention engaged with a grouting hole;

FIG. 4 is a perspective cross-sectional view of a second hole set of the present invention engaged with a grouting hole;

fig. 5 is a perspective sectional view of the sleeve rotated by 180 ° along the axis of the sleeve on the basis of fig. 3.

The reference numerals in the figures are explained below:

1. a threaded pipe; 2. perforating a pipe; 3. drilling a head part; 4. grouting holes; 5. a sleeve; 501. a first end; 502. a second end; 6. a first group of holes; 7. a second group of holes; 8. a slurry outlet; 9. positioning blocks; 10. and (6) positioning a groove.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The utility model provides a high pressure jet grouting drill bit, as shown in fig. 1 and 2, includes screwed pipe 1, trompil pipe 2 and drill bit portion 3, screwed pipe 1 and trompil pipe 2 integrated into one piece, 3 threaded connection in the tip of trompil pipe 2 of drill bit portion, 2 inner chambers of trompil pipe and screwed pipe 1 intercommunication, and five slip casting holes 4 have been seted up to the lateral wall.

The perforated pipe 2 is sleeved with a sleeve 5, two ends of the sleeve 5 respectively abut against the threaded pipe 1 and the drill bit part 3, in order to ensure that two ends of the sleeve 5 respectively abut against the threaded pipe 1 and the drill bit part 3, the outer diameter of the joint of the drill bit part 3 and the perforated pipe 2 is larger than that of the perforated pipe 2, and the outer diameter of the joint of the threaded pipe 1 and the perforated pipe 2 is larger than that of the perforated pipe 2;

the side wall of the sleeve 5 is provided with a first set of holes 6 and a second set of holes 7.

The first hole group 6 includes five outlet holes 8 corresponding to the positions of the five injection holes 4, and the second hole group 7 includes three outlet holes 8 corresponding to the positions of three of the injection holes 4.

As shown in fig. 2 to 4, the two ends of the sleeve 5 are a first end 501 and a second end 502, respectively, when the first end 501 abuts against the bit portion 3, the five grout outlet holes 8 of the first hole group 6 are aligned with the five grout outlet holes 4, respectively, and when the second end 502 abuts against the bit portion 3, the three grout outlet holes 8 of the second hole group 7 are aligned with the three grout outlet holes 4, respectively.

To ensure that the second group of holes 7 is aligned with the outlet holes 8 after the turn of the sleeve 5, the distance between the first group of holes 6 and the first end 501 may be set equal to the distance between the second group of holes 7 and the second section.

The realization principle for solving the technical problems is as follows: the worker can connect the threaded pipe 1 to the drill rod of the grouting machine in a threaded mode, then screw the lower drill head part 3 down, take out the casing pipe, if grouting with large displacement is needed, the worker can enable the sleeve 5 to abut against the threaded pipe 1 along the second end 502 and sleeve the sleeve outside the perforated pipe 2, rotate the sleeve 5 to enable the five grouting holes 4 and the five grout outlet holes 8 to be aligned, screw the drill head part 3 up, enable the first end 501 of the sleeve 5 to abut against the drill head part 3, the fixing principle of the sleeve 5 utilizes the clamping force of the threaded pipe 1 and the drill head part 3 on the sleeve 5 to fix the sleeve 5, if grouting with small displacement is needed, the worker can enable the sleeve 5 to abut against the threaded pipe 1 along the first end 501 and sleeve the perforated pipe 2 outside, rotate the sleeve 5 to enable the three grouting holes 4 and the three grout outlet holes 8 to be aligned, the other two grouting holes 4 to be abutted against by the inner wall of the sleeve 5, and then screw the drill head part 3 up, the second end 502 of the sleeve 5 is brought to bear against the drill bit portion 3. To sum up, only change the direction that sleeve 5 emboliaed, alright accomplish and utilize a drill bit to realize three injected hole 4 and five injected hole 4's simple and convenient switching, let the staff only need purchase a drill bit from this, just can realize the switching of two kinds of injection quantities, avoid purchasing too much drill bits, cause the drill bit to be idle, the extravagant condition of resource.

The outer wall of the end part, close to the threaded pipe 1, of the perforated pipe 2 is provided with two positioning blocks 9, the two positioning blocks 9 are symmetrical about the axis of the perforated pipe 2, and the inner walls of the two ends of the sleeve 5 are both provided with positioning grooves 10 which are in splicing fit with the positioning blocks 9; the inserting and connecting cooperation of the positioning block 9 and the positioning groove 10 can prevent the sleeve 5 from deviating when the drill bit rotates, so that the grouting hole 4 and the grout outlet hole 8 are staggered.

Fig. 2 only shows the positioning groove 10 at one end of the sleeve, and the principle of opening the positioning groove 10 at the other end is the same.

The positioning block 9 is a trapezoidal block, and the positioning groove 10 is a trapezoidal groove; the sleeve 5 can be conveniently drawn out from the perforated pipe 2 by a worker.

The aperture of the grouting hole 4 is 0.8-1.5cm, and the aperture of the grout outlet 8 is 0.2cm larger than that of the grouting hole 4; slight error may be generated in the aligning process of the grouting holes 4 and the grout outlet holes 8, the diameter of the grout outlet holes 8 is slightly larger than that of the grouting holes 4, and the influence of the error on the grout outlet speed can be avoided.

As a best implementation mode, the aperture of the grouting hole 4 in the utility model is 1.2cm, and the aperture of the grout outlet 8 is 1.4 cm.

In order to let the utility model discloses can also open four injected holes 4, further set up as follows.

As shown in fig. 3 and 5, four of the grouting holes 4 are located at the four corners of a rectangle, and the center of the rectangle is located on the axis of the perforated pipe 2.

When the sleeve 5 rotates 180 degrees along the axis, the four grout outlet holes 8 are respectively aligned with the four grout outlet holes 4, and the rest grout outlet holes 8 are staggered with the rest grout outlet holes 4.

The staff can utilize sleeve 5 to switch five injected holes 4 and four injected holes 4, has increaseed the suitability of drill bit.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications can be made without departing from the scope of the invention.

Claims

1. A high-pressure rotary jet grouting drill bit comprises a threaded pipe (1), a perforated pipe (2) and a drill bit part (3), wherein the threaded pipe (1) and the perforated pipe (2) are integrally formed, and the high-pressure rotary jet grouting drill bit is characterized in that the drill bit part (3) is in threaded connection with the end part of the perforated pipe (2), the inner cavity of the perforated pipe (2) is communicated with the threaded pipe (1), and five grouting holes (4) are formed in the side wall of the perforated pipe;

perforated pipe (2) overcoat is equipped with sleeve (5), the both ends of sleeve (5) support respectively in screwed pipe (1) and drill bit portion (3), first punch combination (6) and second punch combination (7) have been seted up to the lateral wall of sleeve (5), first punch combination (6) include five grout outlet (8) that correspond with five injected hole (4) positions, second punch combination (7) include with three grout outlet (8) that wherein three injected hole (4) position corresponds.

2. A high-pressure rotary jet grouting drill bit according to claim 1, characterized in that the sleeve (5) has a first end (501) and a second end (502) at its two ends, respectively, and that the five outlet holes (8) of the first group (6) are aligned with the five grouting holes (4) when the first end (501) is pressed against the drill head (3), and the three outlet holes (8) of the second group (7) are aligned with the three grouting holes (4) when the second end (502) is pressed against the drill head (3).

3. A high-pressure jet grouting drill bit according to claim 1, characterized in that four of said grouting holes (4) are located at the four corners of a rectangle, the center of which is located on the axis of the perforated pipe (2).

4. A high-pressure jet grouting drill bit according to claim 3, characterized in that when the sleeve (5) is rotated 180 ° along its axis, four of the grout outlet holes (8) are aligned with four grout outlet holes (4), respectively, and the remaining grout outlet hole (8) is misaligned with the remaining grout outlet hole (4).

5. The high-pressure rotary jet grouting drill bit as claimed in claim 1, wherein two positioning blocks (9) are arranged on the outer wall of the end part of the perforated pipe (2) close to the threaded pipe (1), the two positioning blocks (9) are symmetrical about the axis of the perforated pipe (2), and positioning grooves (10) which are matched with the positioning blocks (9) in an inserted manner are formed in the inner walls of the two ends of the sleeve (5).

6. The high-pressure rotary jet grouting drill bit as claimed in claim 5, characterized in that the positioning block (9) is a trapezoidal block and the positioning groove (10) is a trapezoidal groove.

7. The high-pressure jet grouting drill bit as claimed in claim 1, characterized in that the diameter of the grouting hole (4) is between 0.8-1.5cm, and the diameter of the grout outlet (8) is 0.2cm larger than the diameter of the grouting hole (4).

8. The high-pressure jet grouting drill bit as claimed in claim 7, characterized in that the diameter of the grouting hole (4) is 1.2cm, and the diameter of the grout outlet (8) is 1.4 cm.