CN114909080A - Pulse hydraulic impactor and drilling and filling integrated pulse grouting method thereof - Google Patents

Abstract

The invention provides a pulse hydraulic impactor and a drilling and grouting integrated pulse grouting method thereof. The pulse hydraulic impactor comprises an outer pipe, an impact hammer, a hexagonal anvil, a hexagonal sleeve and an upper joint; the upper joint and the hexagonal sleeve are sleeved at two ends of the outer pipe respectively; the hexagonal anvil penetrates through the hexagonal sleeve, and a damping channel and a main channel are arranged in the hexagonal anvil; a main pore passage is arranged in the impact hammer, and the impact hammer is sleeved on the outer pipe and then communicated with an inner hole of the upper joint; the impact hammer can axially move back and forth relative to the outer pipe and the upper joint, so that the other end of the impact hammer is clamped on the hexagonal anvil to plug the main channel, the main channel is communicated with the damping channel, or the other end of the impact hammer is arranged at an interval with the hexagonal anvil, and the main channel is simultaneously communicated with the main channel and the damping channel. The invention can realize the quick impact rotary drilling of hard rocks such as boulders, lump stones, pebbles and the like.

Description

Pulse hydraulic impactor and method for integrated pulse grouting with drilling and grouting

technical field

The invention relates to the technical field of anti-seepage reinforcement of construction engineering foundations, in particular to a pulsed hydraulic impactor and a method for pulsed grouting with integrated drilling and grouting, which are applied to the "integrated drilling and grouting, pulse grouting" method for complex formations such as the Quaternary overburden "Technology for rapid impact rotary drilling and irrigation operations.

Background technique

As a brand-new in-situ ramming grouting technology, "drilling and grouting integrated, pulse grouting" has been widely used in water conservancy, hydropower, municipal and other projects for grouting and anti-seepage and reinforcement of soft foundations. The existing "drilling and grouting, pulse grouting" drilling and grouting process, such as a method of drilling and grouting, top-down, high-pressure punching and grouting disclosed in the existing patent publication number CN102839651B, which combines drilling, grouting, wall protection It is integrated into one, and the grouting liquid is used as the flushing liquid when drilling. The screw seal joint and one-way joint are installed on the upper part of the drill bit to form a screw seal high pressure punching grouting head, and the pulse crowding effect of the single-cylinder single-acting reciprocating plunger grouting pump produces grouting punching. Squeeze force, realize the integration of drilling and irrigation, and carry out high-pressure punching and grouting to the formation from top to bottom.

However, the screw-sealed high-pressure punching grouting head structure used in the drilling and filling process is very slow when encountering hard rocks such as large boulders, boulders, and pebbles.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a pulse hydraulic impactor and a method for the integrated pulse grouting of drilling and grouting. During the construction of the integrated pulse grouting of drilling and grouting, the impact hammer can be cyclically pressed up and down according to the specific pulse frequency of the pulse grouting. Therefore, the drill bit at the bottom of the drilling and irrigation equipment can be continuously and effectively impacted, and the rapid impact rotary drilling of hard rocks such as large boulders, boulders, and pebbles can be realized.

The technical scheme of the present invention is as follows: a pulse hydraulic impactor includes an outer tube, an impact hammer, a hexagonal anvil, a hexagonal sleeve and an upper joint with an inner hole; one end of the outer tube is sleeved on the upper joint, and the other end is sleeved on the upper joint. The hexagonal anvil is sleeved on the hexagonal sleeve; the hexagonal anvil passes through the hexagonal sleeve, and the hexagonal anvil is provided with a damping channel for maintaining the pressure of the pulsed slurry in the outer tube and a main channel for the flow of the pulsed slurry;

A main hole is arranged inside the impact hammer, the impact hammer is sleeved in the outer tube, and one end of the impact hammer is inserted into the upper joint, so that the main hole communicates with the inner hole of the upper joint; The impact hammer can axially reciprocate relative to the outer tube and the upper joint, so that the other end of the impact hammer is clamped on the hexagonal anvil to block the main channel, and the main hole communicates with the damping channel , or, the other end of the impact hammer is spaced apart from the hexagonal anvil, and the main hole communicates with the main channel and the damping channel at the same time.

In the above scheme, fully combined with the pulse flow characteristics of the slurry in the pulse grouting technology, an innovative impactor structure is proposed that can cyclically press up and down the impact hammer according to the frequency of the slurry pulse.

The damping channel is designed in the hexagonal anvil, which can play a certain role in throttling. When the pulse slurry flow is the largest (and the slurry pressure is the largest), due to the small diameter of the damping channel, the pulse slurry cannot be discharged to the bottom of the hole in time, and most of the slurry fluid will enter the bottom of the impact hammer and push the impact hammer compression spring to move up. When the pulsed slurry flow becomes smaller (at the same time, the slurry pressure becomes smaller), the spring pushes the impact hammer downward to perform work, and the slurry discharged during the impacting process of the impact hammer flows into the bottom of the DTH bit through the damping hole.

The main function of designing the damping channel is to keep the pressure from being released immediately when the slurry pressure increases, thereby pushing the impact hammer to compress the spring. At the same time, it is also necessary to ensure that the central channel is always unobstructed, so as to avoid suffocation due to the inability of the slurry to leak out.

Preferably, one end of the hexagonal anvil extends into the outer tube, and an inclined first hole is arranged in the end of the hexagonal anvil, and a second hole extending along the axial direction is arranged in the end; the hexagonal anvil The other end of the hexagonal anvil protrudes out of the outer side of the hexagonal sleeve, and a third hole extending in the axial direction is arranged in this end of the hexagonal anvil; the second hole is a damping hole, which is axially communicated with the third hole to form the A damping channel, the first channel communicates the second channel and the third channel to form the main channel.

The above-mentioned structural design, combined with the path of the axial movement of the impact hammer, facilitates the positional arrangement of the first channel where the pulsed slurry flows.

Preferably, the hexagonal anvil comprises a first part, a second part, a third part and a fourth part which are communicated in sequence; the third part is slidably connected with the hexagonal sleeve; the second part is connected with the outer tube The inner wall of the tube is adapted to fit, and the second part is provided with the first hole; the first part is gap-fitted with the inner wall of the outer tube, and the gap communicates with the first hole; the second hole is located at the inside of the first part and the second part; the fourth part protrudes from the outside of the hexagonal sleeve, the third hole extends from the fourth part to the second part and communicates with the second hole and the first hole; the impact hammer A sleeve protrudes from the end of the sleeve, and the sleeve can be inserted on the first part when the sleeve is axially displaced, so as to block the first hole.

The first hole can be blocked or opened by the sleeve structure designed on the impact hammer and the hexagonal anvil set, so as to effectively realize the continuous and effective impact on the down-the-hole drill bit.

Preferably, the first part, the second part and the fourth part are cylindrical, and the third part is a hexagonal body or a spline that slides with the hexagonal sleeve.

The hexagonal sleeve and the hexagonal anvil are slidably connected by a hexagonal body or a spline, so as to realize axial sliding between the two. When the drilling and irrigation equipment rotates, the outer pipe (that is, the drill pipe) drives the hexagonal sleeve to rotate, thereby driving the hexagonal anvil to rotate, so that the down-the-hole drill bit is rotated to break the rock. At the same time, the impact hammer will continuously impact the hexagonal anvil to transfer the impact energy to the DTH drill bit to break the stone. If there is no axial sliding between the hexagonal anvil and the hexagonal sleeve, for example, the two are connected by thread, the impact energy of the impact hammer will be transmitted to the hexagonal sleeve through the thread, so that the impact energy cannot be effectively transmitted to the drill bit gravel.

Preferably, the first channel is provided with n pieces on the tail, n>4, and the number is even. The quantity is designed to better form the pressure relief channel of the pulsed slurry, so that the pulsed slurry can be discharged to the bottom of the hole evenly and in time.

Preferably, the second part and the third part are stepped shafts in decreasing order, so that the second part is formed with a stepped surface, and a stroke L for the axial displacement of the hexagonal anvil is formed between the stepped surface and the end surface of the hexagonal sleeve. .

Appropriate stroke is designed so that when the drill bit is working on gravel, it can carry out a certain range of up and down reciprocating impact as required to achieve continuous and effective impact, and further impact rotary drilling on hard rocks such as large boulders, boulders, and pebbles.

Preferably, the impact hammer is a stepped shaft, the small diameter end of which is inserted into the upper joint, the large diameter end is sleeved with the outer tube; the small diameter end is sleeved with a spring; the spring is connected with the upper joint and the large diameter end. The stepped end face of the radial end abuts.

Preferably, the upper joint is threadedly connected to the outer pipe; the hexagonal sleeve is threadedly connected to the outer pipe; and the hexagonal anvil is threadedly connected to the DTH drill.

The present invention also provides a method of drilling and grouting integrated pulse grouting. The pulse grouting is pressed into the above-mentioned pulse hydraulic impactor, so that the down-the-hole drill bit connected to the hexagonal anvil of the pulse hydraulic impactor works; when the pulse pressure increases When the pressure is large, the impact hammer is pressed upward, the impact hammer is spaced from the hexagonal anvil, and the pulsed slurry enters the end of the DTH drill bit from the first, second and third holes respectively through the main channel; when the pulse pressure decreases, the impact The hammer impacts the hexagonal anvil downward, and the impact hammer blocks the first channel, and the pulsed slurry enters the end of the DTH drill bit through the main channel, the second channel and the third channel; reciprocating from above, cyclic upward pressure and downward punching are performed .

Preferably, the pulsed slurry is pressed into the pulse hydraulic impactor through a drilling and irrigation tool, and the drilling and irrigation tool is threadedly connected to the upper joint of the pulsed hydraulic impactor.

Compared with the related art, the beneficial effects of the present invention are:

1. During the pulse grouting construction of the drilling and irrigation integration, the pulse hydraulic impactor can cyclically press up and down the impact hammer according to the specific pulse frequency of the pulse slurry, so as to continuously and effectively impact the drill bit at the bottom of the drilling and irrigation tool. , to achieve rapid impact rotary drilling of hard rocks such as large boulders, boulders, and pebbles;

2. Effectively solve the technical problem of "drilling and grouting, pulse grouting" technology that cannot use the existing hydraulic impactor due to the pulse flow characteristics of the slurry;

3. The pulse hydraulic impactor of the present invention will make the "drilling and grouting in one, pulse grouting" technology to perform anti-seepage consolidation grouting construction of complex formations such as Quaternary overburden more safely, quickly, economically and effectively.

Description of drawings

1 is a schematic structural diagram of the pulse hydraulic impactor provided by the present invention when it is pressed up;

FIG. 2 is a schematic structural diagram of the pulse hydraulic impactor provided by the present invention when it is down-punched;

3 is a schematic diagram of an embodiment taken along A-A of FIG. 1;

FIG. 4 is a schematic diagram of another embodiment taken along the line A-A of FIG. 1 .

In the drawings: 1. Upper joint; 2. Spring; 3. Outer tube; 4. Impact hammer; 41. Main channel; 42. Sleeve; 5. Hexagonal anvil; 51. First channel; 52. Second channel; 53, the third channel; 54, the first part; 55, the second part; 56, the third part; 6, the hexagonal set.

Detailed ways

The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments. It should be noted that the embodiments of the present invention and the features of the embodiments may be combined with each other under the condition of no conflict. For the convenience of description, the words "up", "down", "left" and "right" appear in the following text, which only means that the directions of up, down, left and right are consistent with the drawings themselves, and do not limit the structure.

As shown in FIG. 1 , a pulse hydraulic impactor provided in this embodiment includes an upper joint 1 , an outer tube 3 , an impact hammer 4 , a hexagonal anvil 5 and a hexagonal sleeve 6 .

The upper end of the upper joint 1 is threadedly connected with the drilling and irrigation equipment, and the lower end is threadedly connected with the upper end of the outer pipe 3 . The lower end of the outer tube 3 is threadedly connected with the hexagonal sleeve 6 . The upper joint 1 has an inner hole.

The impact hammer 4 is a stepped circular shaft, the small diameter end is inserted into the upper joint 1 (inserted in a piston sleeve structure), and the large diameter end is sleeved with the outer tube 3 (in a piston sleeve structure). A spring 2 is sheathed on the small diameter end. The spring 2 is in contact with the upper joint 1 and the stepped end face of the large diameter end. The inside of the impact hammer 4 is provided with a main hole 41 . A sleeve 42 protrudes from the end of the large diameter end of the impact hammer 4 (ie, the lower end of the impact hammer 4 ).

The hexagonal anvil 5 includes a first part 54 , a second part 55 , a third part 56 and a fourth part 57 which are communicated in sequence. The third portion 56 is slidably connected with the hexagonal sleeve 6 , and the third portion 56 is a hexagonal body (as shown in FIG. 3 ) that is slidably matched with the hexagonal sleeve 6 . Alternatively, the two are connected by splines to form axial sliding between the spline sleeve (corresponding position on the hexagonal sleeve 6 ) and the spline (the third part 56 ) (as shown in FIG. 4 ). It can not only transmit torque but also ensure axial sliding between the hexagonal anvil 5 and the hexagonal sleeve 6 .

The second part 55 and the first part 54 protrude into the outer tube 3 , and a second hole 52 is provided inside the first part 54 and the second part 55 , and the second hole 52 is a damper eyelets.

The second portion 55 is adapted to the inner wall of the outer tube 3 , and the second portion 55 is provided with n inclined first holes 51 , where n>4, which is an even number. In this embodiment, n=6, and the diameter of the first hole 51 is 8 mm.

Both the second portion 55 and the first portion 54 are cylindrical, and the diameter of the first portion 54 is smaller than the diameter of the second portion 55 . The first portion 54 is in clearance fit with the inner wall of the outer tube 3 , and the clearance communicates with the first hole 51 . The fourth portion 57 protrudes from the outer side of the hexagonal sleeve 6, the third hole 53 extends from the fourth portion 57 to the second portion 55 and communicates with the second hole 52 in the axial direction. The third channel 53 communicates with each other.

The second hole 52 and the third hole 53 are axially communicated to form a damping channel, and the first hole 51 connects the second hole 52 and the third hole 53 to form a main channel for the pulsed slurry to enter and exit the bottom of the DTH bit.

The fourth part 57 is cylindrical, and the outer surface is provided with an external thread, which is used for threaded installation of a down-the-hole drill bit (not shown). The second part 55 and the third part 56 are stepped shafts with decreasing steps, so that the second part 55 is formed with a stepped surface, and a stroke for the axial displacement of the hexagonal anvil 5 is formed between the stepped surface and the end surface of the hexagonal sleeve 6 . L. The stroke L enables the drill bit to have an up and down reciprocating impact, which can realize continuous and effective drilling work.

The impact hammer 4 is a stepped shaft, the small diameter end of which is inserted into the upper joint 1 , the large diameter end is sleeved with the outer tube 3 , and a sleeve 42 is protruding from the end of the large diameter end. A spring 2 is sheathed on the small diameter end. The spring 2 is in contact with the upper joint 1 and the stepped end face of the large diameter end. The main hole 41 of the installed impact hammer 4 communicates with the inner hole of the upper joint 1 . The sleeve 42 is adapted to the first part 54 , and when the impact hammer 4 is displaced axially, the sleeve 42 can be inserted into the first part 54 , so that the sleeve 42 can push the first part 54 . The hole 51 is blocked. After blocking, the main channel 41 , the second channel 52 and the third channel 53 communicate with each other (as shown in FIG. 2 ). Alternatively, the sleeve 42 of the impact hammer 4 is spaced apart from the hexagonal anvil 5 , and the first hole 51 is opened so that one end of the second hole 52 passes through the space between the first part 54 and the inner wall of the outer tube 3 . The gap is communicated with the main hole 41, the other end of the second hole 52 is communicated with the third hole 53, and at the same time, the damping channel is also communicated (as shown in FIG. 1).

The diameter of the second hole 52 is 3-6 mm, which is determined according to the pulse amount and impact stroke test. The diameter of the first hole 51 is 6-10 mm, and the diameter of the third hole 53 is larger than the diameter of the first hole 51 .

As shown in FIG. 1 and FIG. 2 , the present invention also provides a method of drilling and grouting integrated pulse grouting, wherein the pulse grouting is pressed into the above-mentioned pulse hydraulic impactor through a drilling and grouting tool. When the pulse pressure increases to the maximum value, the impact hammer presses upward, the impact hammer is spaced from the hexagonal anvil, and the pulse slurry enters the end of the DTH bit from the first, second and third holes through the main channel. When the pulse pressure is reduced to a minimum value, the impact hammer impacts the hexagonal anvil downward, and the impact hammer blocks the first channel, and the pulse slurry enters the end of the DTH bit through the main channel, the second channel and the third channel; Reciprocating from top to bottom, with the pulsed slurry cyclically up and down the impact hammer according to the pulse frequency, the drill bit at the bottom of the drilling and irrigation equipment is continuously and effectively impacted to achieve rapid impact on hard rocks such as large boulders, boulders, and pebbles. Rotary drilling.

When the flow rate of the pulsed slurry is the largest (and the maximum slurry pressure at the same time), due to the small diameter of the damping hole (the second channel 52), the pulsed slurry cannot be discharged to the bottom of the DTH bit in time, and most of the slurry fluid will enter the bottom of the impact hammer to push The hammer compression spring moves up. When the pulsed slurry flow becomes smaller (at the same time, the slurry pressure becomes smaller), the spring pushes the impact hammer downward to perform work, and the slurry discharged during the impacting process of the impact hammer flows into the bottom of the DTH bit through the damping hole.

The above descriptions are only the embodiments of the present invention, and are not intended to limit the scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the description and drawings of the present invention, or directly or indirectly applied to other related technologies Fields are similarly included in the scope of patent protection of the present invention.

Claims (10)

1. A pulsed hydraulic impactor, characterized in that it comprises an outer tube (3), an impact hammer (4), a hexagonal anvil (5), a hexagonal sleeve (6) and an upper joint (1) with an inner hole; One end of the outer tube (3) is sleeved on the upper joint (1), and the other end is sleeved on the hexagonal sleeve (6); the hexagonal anvil (5) is worn through the hexagonal sleeve (6), and The hexagonal anvil (5) is provided with a damping channel for maintaining the pressure of the pulsed slurry in the outer tube (3) and a main channel for the flow of the pulsed slurry; The inside of the impact hammer (4) is provided with a main hole (41), the impact hammer (4) is sleeved in the outer tube (3), and one end of the impact hammer (4) is inserted into the upper In the joint (1), the main hole (41) is communicated with the inner hole of the upper joint (1); the impact hammer (4) can be axially reciprocated relative to the outer tube (3) and the upper joint (1) , so that the other end of the impact hammer (4) is clamped on the hexagonal anvil (5) to block the main channel, the main hole (41) is communicated with the damping channel, or the impact hammer The other end of the anvil is spaced from the hexagonal anvil (5), and the main hole (41) communicates with the main channel and the damping channel at the same time. 2 . The impulse hydraulic impactor according to claim 1 , wherein one end of the hexagonal anvil ( 5 ) extends into the outer tube ( 3 ), and is inside the end of the hexagonal anvil ( 5 ). 3 . An inclined first hole (51) is provided, and a second hole (52) extending in the axial direction is arranged in this end; the other end of the hexagonal anvil (5) protrudes out of the outer side of the hexagonal sleeve (6), A third hole (53) extending in the axial direction is arranged in this end of the hexagonal anvil (5); the second hole (52) is a damping hole, which is communicated with the third hole (53) in the axial direction to form the A damping channel, the first channel (51) communicates the second channel (52) and the third channel (53) to form the main channel. 3 . The impulse hydraulic impactor according to claim 2 , wherein the hexagonal anvil ( 5 ) comprises a first part ( 54 ), a second part ( 55 ), and a third part ( 56 ) that are communicated in sequence. 4 . and the fourth part (57); the third part (56) is slidably connected with the hexagonal sleeve (6); the second part (55) is adapted to the inner wall of the outer tube (3), and the The second part (55) is provided with the first hole (51); the first part (54) is in clearance fit with the inner wall of the outer tube (3), and the gap is matched with the first hole (51) The second hole (52) is located inside the first part (54) and the second part (55); the fourth part (57) protrudes from the outside of the hexagonal sleeve (6), and the third hole (53) extends from the fourth part (57) to the second part (55) and communicates with the second hole (52) and the first hole (51); the end of the impact hammer (4) is protruded with a sleeve (42), the sleeve (42) can be inserted into the first part (54) during axial displacement, so as to block the first hole (51). 4. The impulse hydraulic impactor according to claim 3, wherein the first part (54), the second part (55) and the fourth part (57) are cylindrical, and the third part (56) is a hexagonal body, or a spline, which is slidingly matched with the hexagonal sleeve (6). 5 . The impulse hydraulic impactor according to claim 3 , wherein the second portion ( 55 ) is provided with n pieces of the first orifice ( 51 ), where n > 4 and an even number. 6 . 6 . The impulse hydraulic impactor according to claim 3 , wherein the second part ( 55 ) and the third part ( 56 ) are stepped shafts that decrease gradually, so that the second part ( 55 ) is formed. 7 . There is a stepped surface, and a stroke L for the axial displacement of the hexagonal anvil (5) is formed between the stepped surface and the end surface of the hexagonal sleeve (6). 7 . The impulse hydraulic impactor according to claim 1 , wherein the impact hammer ( 4 ) is a stepped shaft, the small diameter end of which is inserted into the upper joint ( 1 ), and the large diameter end is inserted into the upper joint ( 1 ). 8 . The outer tube (3) is sheathed; a spring (2) is sheathed on the small diameter end; the spring (2) is in contact with the upper joint (1) and the stepped end face of the large diameter end. 8 . The pulse hydraulic impactor according to claim 1 , wherein the upper joint ( 1 ) is threadedly connected to the outer pipe ( 3 ); the hexagonal sleeve ( 6 ) is threadedly connected to the outer pipe ( 3 ). 9 . 9 . A method of drilling and grouting integrated pulse grouting, the pulsed hydraulic impactor according to any one of claims 1 to 8 is pressed into the pulsed slurry to make the submersible connected to the hexagonal anvil of the pulsed hydraulic impactor. The hole drill bit works; when the pulse pressure increases, the impact hammer presses up, the impact hammer and the hexagonal anvil are spaced apart, and the pulse slurry enters the end of the down-the-hole drill bit from the first, second and third channels through the main channel. ; When the pulse pressure decreases, the impact hammer hits the hexagonal anvil downward, and the impact hammer blocks the first channel, and the pulse slurry enters the end of the DTH bit through the main channel, the second channel and the third channel; reciprocating from top to bottom , perform cyclic upward pressure and downward pressure. 10 . The method for integrated pulse grouting with drilling and irrigation according to claim 9 , wherein the pulsed slurry is pressed into the pulse hydraulic impactor through a drilling and irrigation tool, and the difference between the drilling and irrigation tool and the pulse hydraulic impactor is 10 . The upper connector is threaded.

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