CN111254934B

CN111254934B - Grouting device for hole sealing of drilling

Info

Publication number: CN111254934B
Application number: CN202010098823.8A
Authority: CN
Inventors: 康卫; 刘双红; 李冬; 付小畅; 黄志良; 郝雪斌; 蒋蕤
Original assignee: China Construction Fourth Engineering Division Corp Ltd
Current assignee: China Construction Fourth Engineering Division Corp Ltd
Priority date: 2020-02-18
Filing date: 2020-02-18
Publication date: 2023-04-21
Anticipated expiration: 2040-02-18
Also published as: CN111254934A

Abstract

The invention relates to a grouting device for hole sealing of a drilling hole, which comprises a grouting pump, a slurry tank, a pressurizing tank, a grouting pipe and a base, wherein the grouting pump, the slurry tank and the pressurizing tank are all arranged on the base; the grouting pump is communicated with the slurry tank, a discharge hole of the slurry tank is communicated with the pressurizing tank, the bottom of the pressurizing tank is connected with the grouting pipe, and the grouting pump is used for injecting slurry from the slurry tank into the pressurizing tank and outputting the slurry from the grouting pipe under the pressurization of the pressurizing tank; the front end grouting section of the grouting pipe is provided with a section of stirring part, and the tail end of the stirring part is connected with a discharge head; still include a motor and be used for driving stirring portion rotates, and this scheme can avoid the slip casting hole too little, and the unable effective quick exhaust problem of air to avoid the appearance of slip casting vacuum, be favorable to improving slip casting quality.

Description

Grouting device for hole sealing of drilling

Technical Field

The invention relates to the field of grouting, in particular to a grouting device for drilling and sealing holes.

Background

Grouting refers to a method for improving physical and mechanical properties of a rock-soil foundation by injecting certain curable slurry into cracks or pores of the rock-soil foundation by a proper method, and by means of replacement, filling, extrusion and the like in the construction engineering. Grouting is needed in tunneling for filling a gap between a shield tunneling machine and the top of a tunnel, for example, so as to avoid collapse. In some blasting operations, grouting is also required during drilling and sealing. Taking the boulder blasting as an example, hole sealing treatment is carried out on each drill hole after the boulder blasting drilling and core drilling treatment are finished, the hole sealing is carried out in a mode of injecting single-liquid slurry, the single-liquid slurry can be prepared according to the water-cement ratio of 1:1 (meanwhile, the single-liquid slurry can be adjusted according to the actual condition of the site, and the purpose of filling is achieved), and site management staff and supervision engineers witness the hole sealing and compacting during the grouting, and the strict operation is ensured. In the existing grouting construction, the grouting process is usually completed by a grouting machine, which is a device driven by a grouting pump or a grouting piston as a core and used for injecting slurry into a filling area through a pipeline.

The disadvantages of the prior art are: in grouting process, to the slip casting of big gap class, traditional equipment can satisfy its construction requirement basically, can realize full filling, however in some small-size filling areas, for example in the drilling and the hole sealing process of blast hole in the blasting process of above-mentioned, because traditional grouting machine ejection of compact is fast, and the drilling is less to the problem that gas can't get rid of appears, causes the thick liquid slip casting in-process unable subsidence, thereby appears partial slip casting vacuum, can not reach the construction requirement, especially in the blast hole, the hole sealing is not enough can lead to the blasting to fail, causes the engineering to fail even.

Disclosure of Invention

The invention aims to overcome the defects of the prior art, and provides a grouting device for drilling and sealing, which is mainly used for grouting operation in small-sized drilling and sealing, and can avoid the problems that a grouting hole is too small and air cannot be effectively and rapidly discharged, thereby avoiding the occurrence of grouting vacuum and being beneficial to improving grouting quality.

The aim of the invention is realized by the following technical scheme:

the grouting device for hole sealing of the drill hole comprises a grouting pump, a slurry tank, a pressurizing tank, a grouting pipe and a base, wherein the grouting pump, the slurry tank and the pressurizing tank are all arranged on the base;

the grouting pump is communicated with the slurry tank, a discharge hole of the slurry tank is communicated with the pressurizing tank, the bottom of the pressurizing tank is connected with the grouting pipe, and the grouting pump is used for injecting slurry from the slurry tank into the pressurizing tank and outputting the slurry from the grouting pipe under the pressurization of the pressurizing tank;

the front end grouting section of the grouting pipe is provided with a section of stirring part, and the tail end of the stirring part is connected with a discharge head;

the stirring part is composed of a plurality of stirring units, and each stirring unit comprises a bearing composed of an inner ring, an outer ring and balls, and a plurality of stirring hammers radially fixed on the outer ring;

the bearings of the stirring units are coaxially and sequentially fixed on the grouting pipe through an inner ring, gears are arranged on the end surfaces of two sides of the outer ring, and coaxial rotation is realized between two adjacent stirring units through gear transmission;

the stirring unit comprises a stirring part, a grouting pipe, a motor, a rotary shaft, a stirring unit outer ring, a stirring unit, a rotary shaft and a rotary shaft.

Compared with the traditional grouting machine, the scheme reasonably improves the head part, namely the discharge port, of the grouting pipe, so that the grouting pipe is stirred while grouting, grouting vacuum is eliminated, and bubbles are avoided after grouting. The principle of the concrete scheme is that a bearing is coaxially arranged on a discharge hole of a grouting pipe and a section of the grouting pipe which extends reversely, a plurality of stirring hammers are arranged on an outer ring of the bearing, the bearings coaxially rotate through gears, then a motor is arranged on the axis of the inner wall of the discharge end of the grouting pipe and used for driving a discharge head to rotate, and the discharge head is fixed with the outer ring of the bearing so as to drive the outer ring of the bearing to rotate, so that the stirring hammers also rotate along with the rotation of the bearing. In the process, the grouting material is sprayed out from the discharge head in a centrifugal mode, and is stirred by the stirring hammer after grouting, so that the occurrence of filling vacuum can be completely eradicated, and the grouting quality is improved.

The gear butt joint mode between the stirring units comprises a seamless butt joint mode and a seamless butt joint mode. The advantages and disadvantages of the two modes are different, wherein the seamless butt joint mode uses straight holes, the seamed butt joint mode is suitable for bending holes, bending of the stirring part can be achieved, and therefore different working conditions are used.

Further, a plurality of discharging holes are formed in the side wall of the discharging head. The advantage of arranging the discharge hole is that the grouting liquid can be prevented from all rushing out at one time, but is sprayed out in a single strand, the impact is completed during grouting, and the vacuum is avoided.

Further, the end face of the butt joint side of the discharge head and the grouting pipe is fixedly connected with the outer ring of the bearing at the tail end of the grouting pipe, the end face extends towards the axis to form a fixed shaft, and the fixed shaft is connected with a motor rotating shaft;

or the motor rotating shaft extends to the bottom of the discharge head and is coaxially connected with the bottom of the discharge head.

By adopting the two butt joint modes, the motor can be prevented from being exposed, so that the grouting pipe is prevented from being impacted and damaged in the extending hole.

Further, the motor is fixed on the inner wall of the front end of the grouting pipe through the supporting frame, the motor is a miniature waterproof motor, the size of the motor is not more than half of the flow area of the grouting pipe, and a motor power-on cable is paved along the inner wall of the grouting pipe, or an interlayer is arranged on the side wall of the grouting pipe and used for burying the cable.

Further, the diameter of the stirring part does not exceed the diameter of the discharge head, and the stirring part can be ensured not to influence the extension of the grouting pipe in the mode, so that the problem that the stirring part is too large and the grouting pipe cannot extend is avoided

Further, the length of the stirring part is 10cm-30cm.

Further, the stirring hammer is composed of a connecting rod and a spherical weight, and the spherical weight has the advantage that the resistance of the sphere in the fluid is minimum.

Further, the base is provided with wheels, and the wheels are arranged, so that the whole equipment can be carried more easily.

Further, the grouting pipe is fixedly connected with the pressurizing tank through bolts.

Further, the pressure tank is provided with a pressure gauge for monitoring the pressure.

Compared with the traditional grouting machine, the grouting machine has the beneficial effects that:

(1) Grouting is completed at the same time, grouting liquid is centrifugally injected through rotation of a discharge head, and compared with the traditional direct injection, grouting vacuum is unlikely to occur in the scheme;

(2) The stirring part continuously rotates to stir the grouting liquid during grouting, so that the phenomenon that the grouting liquid forms vacuum bubbles can be further avoided, and bubble-free filling is realized;

(3) The structure of stirring portion not only can be applicable in straight line hole, still can be applicable in curved surface hole, can stretch into the slip casting downthehole with the slip casting pipe, and can accomplish the stirring in the maze simultaneously, compare with traditional straight cylinder stirring that can only realize, the suitability of this scheme is stronger.

Drawings

FIG. 1 is a schematic diagram of the structure of the present invention;

FIG. 2 is a side view of the stirring unit;

fig. 3 is a front view of the stirring unit;

FIG. 4 is a schematic illustration of a grouting section;

FIG. 5 is a cross-sectional view of a grouting section;

FIG. 6 shows another mounting of the motor and the discharge head;

fig. 7 is another schematic distribution diagram of the stirring unit.

Detailed Description

The technical scheme of the present invention is described in further detail below in connection with specific embodiments, but the scope of the present invention is not limited to the following.

As shown in the figure, a grouting device for hole sealing of a borehole comprises a grouting pump 1, a slurry tank 2, a pressurizing tank 3, a grouting pipe 4 and a base 7, wherein the grouting pump 1, the slurry tank 2 and the pressurizing tank 3 are all arranged on the base 7. In this scheme, the grouting pipe 4 adopts a flexible pipeline with an inner wall reinforced with spiral steel wires, so that the grouting pipe can be bent at will. The grouting pump 1 is communicated with the slurry tank 2, a discharge hole of the slurry tank 2 is communicated with the pressurizing tank 3, the bottom of the pressurizing tank 3 is connected with the grouting pipe 4, and the grouting pump 1 is used for injecting slurry from the slurry tank 2 into the pressurizing tank 3 and outputting the slurry from the grouting pipe 4 under the pressurization of the pressurizing tank 3. The front end grouting section of the grouting pipe 4 is provided with a section of stirring part 5, the tail end of the stirring part 5 is connected with a discharge head 6, the structure of the stirring part can be shown by referring to fig. 4, the stirring part 5 is arranged at the front section of the grouting pipe 4, and the schematic structural diagram of the stirring part can be shown by referring to fig. 2 and 3. The stirring section 5 is composed of a plurality of stirring units each including a bearing composed of an inner ring 51 and an outer ring 52 and balls 53, and a plurality of stirring hammers 55 fixed to the outer ring 52 in the radial direction; namely, the stirring device is equivalent to a structure comprising a bearing and a stirring hammer 55, the bearings of a plurality of stirring units are coaxially and sequentially fixed on the grouting pipe 4 through an inner ring 51, gears 54 are arranged on the end surfaces of two sides of the outer ring 52, and the adjacent stirring units realize coaxial rotation through the transmission of the gears 54, namely, the gears are axially arranged on the end surfaces of the bearings, and the structure is shown in the figure 2, so that the coaxial transmission of the bearings which are in butt joint can be realized. In order to complete the driving, the stirring unit further comprises a motor 8, wherein the motor 8 is fixed on the inner wall of the discharge hole of the grouting pipe 4, a rotating shaft of the motor 8 is coaxially connected with the discharge head 6, and the end face of the discharge head 6 is fixedly connected with an outer ring 52 of the stirring unit at the forefront end of the stirring part 5. The end face 62 of the butt joint side of the discharge head 6 and the grouting pipe 4 is fixedly connected with the bearing outer ring 52 at the tail end of the grouting pipe 4, namely, the end face 62 is fixed with the leftmost stirring unit outer ring 52 in fig. 5, wherein the fixing mode can be a bolt fixing mode or a direct welding mode, and the bolt fixing mode is preferably adopted in the embodiment, so that the discharge head 6 can be conveniently replaced and the cleaning of the internal structure is conveniently carried out. The end face 62 extends towards the axis to form a fixed shaft, the fixed shaft is connected with the rotating shaft of the motor 8, the structure of the fixed shaft can be shown by referring to fig. 5, the fixed shaft is essentially equivalent to that a fixed plate crossing the axis is arranged at the right end of the discharge head 6, and the rotating shaft of the motor 8 is fixed at the center of the fixed plate, so that grouting smoothness between the grouting pipe 4 and the discharge head 6 is ensured, and the motor 8 can drive the discharge head 6 to rotate, so that grouting liquid is injected in a centrifugal mode. In addition, the rotating shaft of the motor 8 can also extend to the bottom of the discharging head 6 and is coaxially connected with the bottom of the discharging head 6, and the structure of the motor is shown in fig. 6. The motor 8 is fixed on the inner wall of the front end of the grouting pipe 4 through a supporting frame, the motor 8 is a miniature waterproof motor, the size of the miniature waterproof motor is not more than half of the flow area of the grouting pipe 4, a power-on cable of the motor 8 is paved along the inner wall of the grouting pipe 4, or an interlayer is arranged on the side wall of the grouting pipe 4 and used for burying the cable

As a preferred embodiment, the gear 54 butt joint mode between the stirring units comprises a seamless butt joint mode and a slotted butt joint mode, wherein the seamless butt joint mode can be shown by referring to fig. 4-6, in the mode, the stirring section cannot be bent due to the seamless butt joint, the stirring unit is mainly suitable for straight drilling, when the slotted butt joint mode is adopted, the structure can be shown by referring to fig. 7, and due to gaps between the stirring units, the whole stirring section can be bent at a certain angle within the range of the gaps, wherein the larger the size of the gear is, the larger the gap is, the bending angle is, and different types of stirring structures can be reasonably selected according to construction requirements. A plurality of discharge holes 61 are formed in the side wall of the discharge head 6, the diameter of the stirring part 5 does not exceed the diameter of the discharge head 6, the length of the stirring part 5 is 10cm-30cm, the stirring hammer 55 is composed of a connecting rod and a spherical heavy hammer, the base 7 is provided with wheels, the grouting pipe 4 is fixedly connected with the pressurizing tank 3 through bolts, the length of the grouting pipe 4 can be prolonged so as to be suitable for drilling at different depths, and the pressurizing tank 3 is provided with a pressure gauge for monitoring pressure.

The foregoing is merely a preferred embodiment of the invention, and it is to be understood that the invention is not limited to the form disclosed herein and is not to be considered as excluding other embodiments, but is capable of numerous other combinations, modifications and environments and is capable of modifications within the scope of the inventive concept, as expressed herein, by the foregoing teachings or by the skilled person or knowledge of the relevant art. And that modifications and variations which do not depart from the spirit and scope of the invention are intended to be within the scope of the appended claims.

Claims

1. The grouting device for hole sealing of the drill hole is characterized by comprising a grouting pump (1), a slurry tank (2), a pressurizing tank (3), a grouting pipe (4) and a base (7), wherein the grouting pump (1), the slurry tank (2) and the pressurizing tank (3) are all arranged on the base (7);

the grouting pump (1) is communicated with the slurry tank (2), a discharge hole of the slurry tank (2) is communicated with the pressurizing tank (3), the bottom of the pressurizing tank (3) is connected with the grouting pipe (4), and the grouting pump (1) is used for injecting slurry from the slurry tank (2) into the pressurizing tank (3) and outputting the slurry from the grouting pipe (4) under the pressurization of the pressurizing tank (3);

the front end grouting section of the grouting pipe (4) is provided with a section of stirring part (5), and the tail end of the stirring part (5) is connected with a discharge head (6);

the stirring part (5) is composed of a plurality of stirring units, and each stirring unit comprises a bearing composed of an inner ring (51), an outer ring (52) and balls (53), and a plurality of stirring hammers (55) radially fixed on the outer ring (52);

the bearings of a plurality of stirring units are coaxially and sequentially fixed on the grouting pipe (4) through an inner ring (51), gears (54) are arranged on the end surfaces of two sides of the outer ring (52), and the adjacent two stirring units realize coaxial rotation through the transmission of the gears (54);

the stirring unit comprises a grouting pipe (4), and is characterized by further comprising a motor (8), wherein the motor (8) is fixed on the inner wall of a discharge hole of the grouting pipe (4), a rotating shaft of the motor (8) is coaxially connected with the discharge head (6), and the end face of the discharge head (6) is fixedly connected with an outer ring (52) of a stirring unit at the foremost end of the stirring part (5).

2. The grouting device for hole sealing of a drill hole according to claim 1, wherein the gear (54) butt joint mode between the stirring units comprises a seamless butt joint mode and a seamless butt joint mode.

3. The grouting device for drilling and sealing holes according to claim 1, wherein a plurality of discharging holes (61) are formed in the side wall of the discharging head (6).

4. The grouting device for drilling and sealing according to claim 1, wherein an end face (62) of the butting side of the discharge head (6) and the grouting pipe (4) is fixedly connected with an outer ring (52) of a bearing at the tail end of the grouting pipe (4), the end face (62) extends towards the axis to form a fixed shaft, and the fixed shaft is connected with a rotating shaft of the motor (8);

or the rotating shaft of the motor (8) extends to the bottom of the discharging head (6) and is coaxially connected with the bottom of the discharging head (6).

5. The grouting device for hole drilling and sealing according to claim 4, wherein the motor (8) is fixed on the inner wall of the front end of the grouting pipe (4) through a supporting frame, the motor (8) is a miniature waterproof motor, the size of the miniature waterproof motor is not more than one half of the flow area of the grouting pipe (4), and a power-on cable of the motor (8) is paved along the inner wall of the grouting pipe (4), or an interlayer is arranged on the side wall of the grouting pipe (4) for embedding the cable.

6. A grouting device for drilling and sealing according to claim 1, characterized in that the diameter of the stirring section (5) does not exceed the diameter of the discharge head (6).

7. The grouting device for hole sealing of drill holes according to claim 1, wherein the length of the stirring portion (5) is 10cm-30cm.

8. The grouting device for hole sealing of drill holes according to claim 1, wherein the stirring hammer (55) is composed of a connecting rod and a spherical weight.

9. A grouting device for use in drilling and sealing according to claim 1, characterised in that the base (7) is provided with wheels.

10. The grouting device for drilling and sealing according to claim 1, wherein the grouting pipe (4) is fixedly connected with the pressurizing tank (3) through bolts, and the pressurizing tank (3) is provided with a pressure gauge for monitoring pressure.