CN204627414U - A kind of drill bit for quadruple high-pressure rotary-spray - Google Patents

Abstract

A drill bit for quadruple high-pressure jet spraying, including a drill body, which is sequentially fitted with a first connecting sleeve, a second connecting sleeve, and a third connecting sleeve from outside to inside; it also includes a core tube, the left end of which is Installed in the third connecting sleeve, the right end of the core tube is connected to the cutter head, and the head of the cutter head is installed with a joint. The head is in contact with the steel ball; the core tube is covered with an outer tube, and the two ends of the outer tube are respectively clamped with the drill body and the cutter head; a hole is opened on the peripheral wall of the drill body, and a base is fixed in the hole, and the base The first nozzle assembly is installed on the top through the first gasket, and the mounting seat is fixed on the inner peripheral wall of the hole. , A second nozzle assembly is installed in the counterbore through a second gasket. Improve drilling rig construction efficiency and improve drilling efficiency.

Description

A drill bit for quadruple high-pressure rotary spraying

technical field

The utility model relates to the technical field of rotary spraying drilling tools, in particular to a drill bit for quadruple high-pressure rotary spraying.

Background technique

The soft soil foundation treatment in engineering construction is the key to ensure the quality of the project. The practice shows that the high-pressure injection technology has become increasingly mature after years of research, development and application. High-pressure jet grouting is a technology for treating soft soil foundations. It is widely used in building foundation reinforcement, anti-subsidence, anti-tilt, anti-seepage, anti-sand foundation liquefaction and foundation uplift, etc. The principle of this technology is to use an engineering drilling rig to drill the drill pipe to the expected depth of the foundation, and a special nozzle is installed at the bottom of the grouting pipe, which can spray high-pressure water, air, and slurry jets above 30MPa in the plane or downward direction. The grouting is continuously promoted, and at the same time, it can also swing or rotate, cut and mix the soil, and fill it with cement slurry. After the soil is solidified, a plate or pile that meets the requirements will be formed underground. The thickness of the slab wall can be 0.07-1.00m, and the maximum diameter of the pile body can reach more than 2 meters. Several plates or piles intersect to form an underground continuous wall.

The drill bit in the prior art usually has only one channel, and can only transmit one medium (such as mud) at a time. To transmit other mediums (water), it needs to be stopped and replaced, which is not only inconvenient to replace, but also easy to cause blockage, and the hole diameter is small. Work efficiency is low.

Utility model content

Aiming at the above-mentioned shortcomings in the existing production technology, the applicant provides a drill bit for quadruple high-pressure rotary spraying, thereby improving the construction efficiency of the drilling rig and improving the drilling efficiency.

The technical scheme adopted in the utility model is as follows:

A drill bit for quadruple high-pressure rotary spraying, including a drill body, a first connecting sleeve is set inside the drill bit body, a second connecting sleeve is set inside the first connecting sleeve, and a second connecting sleeve is set inside the second connecting sleeve. There is a third connecting sleeve, the first connecting sleeve is fixed by the first retaining ring, the second connecting sleeve and the third connecting sleeve are fixed by the second retaining ring; a core tube is also included, and the left end of the core tube is installed In the third connection sleeve, the right end of the core tube is connected to the cutter head, and the head of the cutter head is installed with a joint. A spring is installed in the hole in the middle of the seat, and the head of the spring is in contact with the steel ball; an outer tube is set on the outside of the core tube, and the two ends of the outer tube are respectively clamped with the drill body and the cutter head; A hole is opened on the circumferential wall of the hole, a base is fixed in the hole, a first nozzle assembly is installed on the base through a first gasket, a mounting seat is fixed on the inner circumferential wall of the hole, and the inner surface of the mounting seat A gap is formed between the wall surface and the outer wall surface of the first nozzle assembly; a counterbore is opened on the peripheral wall of the cutter head, and a second nozzle assembly is installed in the counterbore through a second washer.

Its further technical scheme is:

The structure of the first connecting sleeve is: an arc groove is opened on the middle outer wall of the first connecting sleeve;

The structure of the second connecting sleeve is: a stepped groove is opened on the middle outer wall of the second connecting sleeve;

The structure of the third connecting sleeve is: a groove is formed on the middle outer wall surface.

The beneficial effects of the utility model are as follows:

The utility model has a compact and reasonable structure and is easy to operate. The drill bit is provided with four outlets, which are respectively connected with the four channels of the quadruple diverter. Hole hammer; at the same time, improve the construction efficiency of the drilling rig, improve the drilling efficiency and the strength of the drilling tool. The utility model is suitable for drilling in complex formations.

Description of drawings

Fig. 1 is the structural representation of the utility model.

Fig. 2 is a partial enlarged view of part A in Fig. 1 .

Fig. 3 is a schematic structural diagram of the first connecting sleeve of the present invention.

Fig. 4 is a schematic structural diagram of the second connecting sleeve of the present invention.

Fig. 5 is a schematic structural view of the third connection sleeve of the present invention.

Among them: 1. Drill bit body; 2. First connecting sleeve; 3. Second connecting sleeve; 4. Third connecting sleeve; 5. Core tube; 6. Outer tube; 7. Cutter head; 8. Fixing seat; 9. Joint; 10, spring; 11, steel ball; 12, second nozzle assembly; 13, second washer; 14, first retaining ring; 15, second retaining ring; 16, mounting seat; 17, first nozzle assembly; 18. First washer; 19. Base; 20. Arc groove; 21. Step groove; 22. Groove.

Detailed ways

Below in conjunction with accompanying drawing, illustrate the specific embodiment of the present utility model.

As shown in Figure 1 and Figure 2, the drill bit used for quadruple high-pressure rotary spraying in this embodiment includes a drill body 1, a first connecting sleeve 2 is set inside the drill bit body 1, and a second connecting sleeve 2 is set inside the first connecting sleeve 2. The connecting sleeve 3, the second connecting sleeve 3 is fitted with the third connecting sleeve 4, the first connecting sleeve 2 is fixed by the first retaining ring 14, the second connecting sleeve 3 and the third connecting sleeve 4 are fixed by the second retaining ring 15 Also includes a core tube 5, the left end of the core tube 5 is installed in the third connecting sleeve 4, the right end of the core tube 5 is connected to the cutter head 7, the head of the cutter head 7 is equipped with a joint 9, and the middle part of the cutter head 7 has a stepped hole, A fixed seat 8 is installed in the stepped hole, and a spring 10 is installed in the middle opening of the fixed seat 8. The head of the spring 10 abuts against the steel ball 11; The drill bit body 1 and the cutter head 7 are clamped; there is a hole on the peripheral wall of the drill bit body 1, and a base 19 is fixed in the hole, and a first nozzle assembly 17 is installed on the base 19 through a first gasket 18, and the inner peripheral wall of the hole There is a mounting seat 16 fixed on it, and a gap is formed between the inner wall surface of the mounting seat 16 and the outer wall surface of the first nozzle assembly 17; a counterbore is opened on the peripheral wall of the cutter head 7, and a second gasket 13 is installed in the counterbore. Nozzle assembly 12.

As shown in FIG. 3 , the structure of the first connecting sleeve 2 is: an arc groove 20 is formed on the middle outer wall of the first connecting sleeve 2 .

As shown in FIG. 4 , the structure of the second connecting sleeve 3 is: a stepped groove 21 is formed on the middle outer wall of the second connecting sleeve 3 .

As shown in FIG. 5 , the structure of the third connection sleeve 4 is: a groove 22 is formed on the middle outer wall surface.

Four outlets are formed on the drill bit of the quadruple high-pressure rotary spraying described in the utility model, which are respectively: the first outlet is formed at the gap between the inner wall surface of the mounting seat 16 and the outer wall surface of the first nozzle assembly 17, and the first nozzle Assembly 17 forms the second outlet, second nozzle assembly 12 forms the third outlet, and adapter 9 forms the fourth outlet. The first outlet is used for ventilation. The above four outlets are respectively connected with the quadruple passages of the quadruple diverter to eject gas, high-pressure water, slurry, water (hydraulic hammer) or gas (down-the-hole hammer).

During the construction of the drilling rig, during the drilling process, the fourth channel transports large flow medium water or gas to the fourth outlet of the drill bit.

After drilling to the expected foundation depth, stop the delivery of large flow drilling medium (the fourth channel stops the delivery), the power head of the drilling rig carries the drilling tool up and makes a rotary motion, at this time the background is delivering cement slurry, water, compressed air The primary, secondary, and triple passages of the quadruple splitter pass through the drill pipe to the quadruple drill bit, and a special nozzle is installed at the lower part of the quadruple drill bit to spray high-pressure water, air, and slurry fine jets in the plane or downward direction. With the continuous lifting of the drilling tool, the soil is cut and stirred, and finally a slab or pile that meets the requirements is formed underground.

The above description is an explanation of the utility model, not a limitation of the utility model. For the scope limited by the utility model, please refer to the claims. Within the protection scope of the utility model, any form of modification can be made.

Claims (4)

1. the drill bit for quadruple high-pressure rotary-spray, it is characterized in that: comprise bit body (1), described bit body (1) internal sleeve is equipped with the first adapter sleeve (2), described first adapter sleeve (2) internal sleeve is equipped with the second adapter sleeve (3), described second adapter sleeve (3) internal sleeve is equipped with the 3rd adapter sleeve (4), described first adapter sleeve (2) is fixed by the first back-up ring (14), and described second adapter sleeve (3) and the 3rd adapter sleeve (4) are all fixed by the second back-up ring (15); Also comprise core pipe (5), the left end of described core pipe (5) is arranged in the 3rd adapter sleeve (4), the right-hand member of described core pipe (5) connects cutter head (7), the head field joint (9) of described cutter head (7), described cutter head (7) middle part has shoulder hole, be provided with holder (8) in described shoulder hole, mounting spring (10) in described holder (8) middle part perforate, described spring (10) head abuts with steel ball (11); The outer cover of described core pipe (5) is equipped with outer tube (6), the two ends of described outer tube (6) respectively with bit body (1) and cutter head (7) clamping; The circumferential wall being positioned at bit body (1) has hole, described hole internal fixtion has base (19), described base (19) is provided with first jet assembly (17) by the first packing ring (18), the inner periphery wall in described hole is fixed with mount pad (16), the internal face of described mount pad (16) and the outside wall surface of described first jet assembly (17) are formed with gap; The circumferential wall of described cutter head (7) has counterbore, in described counterbore, by the second packing ring (13), second nozzle assembly (12) is installed.

2. a kind of drill bit for quadruple high-pressure rotary-spray as claimed in claim 1, is characterized in that: the structure of described first adapter sleeve (2) is: in the middle of described first adapter sleeve (2), outside wall surface has arc groove (20).

3. a kind of drill bit for quadruple high-pressure rotary-spray as claimed in claim 1, is characterized in that: the structure of described second adapter sleeve (3) is: in the middle of described second adapter sleeve (3), outside wall surface has step trough (21).

4. a kind of drill bit for quadruple high-pressure rotary-spray as claimed in claim 1, is characterized in that: the structure of described 3rd adapter sleeve (4) is: middle outside wall surface has groove (22).