Anti-blocking type side slope grouting drill bit

Abstract

The utility model discloses an anti-blocking type side slope grouting drill bit, which belongs to the technical field of side slope protection and comprises a grouting pipe and a grouting drilling tool, the grouting drilling tool is mounted at the bottom end of the grouting pipe in a threaded manner, and inner cavities of the grouting drilling tool and the grouting pipe are provided with grouting channels; the grouting drilling tool is composed of a drilling pipe and a drill bit, the top end of the drilling pipe is in threaded connection with the grouting pipe, and the bottom end of the drilling pipe is in threaded connection with the drill bit. A sealing structure is fixedly installed in an inner cavity of the drill pipe, an adjusting structure is slidably installed at the bottom end of the drill bit, a driving disc is driven through an electric rod in the sealing structure, a sealing block is driven by a transmission folding frame to unfold or contract along a moving groove, self-adaptive adjustment is achieved in cooperation with a piston pipe and an air injection pipe, and the sealing structure can be tightly attached to the inner walls of grouting holes with different diameters; effective plugging is formed, the risk that grout flows back to the outside of the drill hole along the drill hole due to untight sealing is effectively reduced, the reinforcing effect of grouting is enhanced, a slope rock-soil body is fully reinforced, and the stable grouting pressure and the reinforcing effect are guaranteed to a certain extent.

Description

Technical Field

[0001] The utility model relates to the technical field of slope protection, in particular to an anti-blocking slope grouting drill bit. Background Technique

[0002] Anti-blocking slope grouting is an optimized grouting technology for slope reinforcement projects. Through a specially designed anti-blocking drill bit and grouting device, it can ensure the continuity of grouting, improve construction efficiency, reduce maintenance costs, and ensure the slope reinforcement effect. It is widely used in projects such as slope protection and landslide control.

[0003] The Chinese patent discloses a grouting structure and a slope protection structure (publication number: CN212983854U). This patent includes an anchor head and an anchor rod. The inner pipe is fixedly installed inside the drill bit. A groove is opened at the top of the inner pipe. The drill rod is hollow. A screw conveyor is arranged inside the drill rod. The screw conveyor is fixedly connected to the inner wall of the drill rod. The driving block has a first state and a second state. The first state is that the driving block rotates counterclockwise and is embedded in the groove. The second state is that the driving block rotates clockwise and moves away from the groove. A funnel is fixedly connected to the drill rod. A feed hole is opened in the drill rod inside the funnel. A handle part is rotatably installed on the drill rod. A transmission part is key-connected to the top of the drill rod.

[0004] Therefore, based on the above search and combined with the existing ones, during the static pressure grouting of slopes, as the slurry fills and splits the formation fissures or pores, the fissures or porosity gradually become smaller, the slurry absorption volume decreases, and the grouting pressure shows an increasing trend. When the grouting pressure is too high, it is easy for the slurry to flow back out of the hole along the borehole. However, this patent lacks an effective response mechanism to the change of grouting pressure, and it is difficult to closely fit the inner wall of the grouting hole to form an effective seal, which may lead to a large amount of slurry backflow, reduce the reinforcement effect of grouting, prevent the slope rock and soil mass from being fully reinforced, affect the project quality and slope stability, and the slurry flowing back out will also pollute the construction site, increasing the difficulty and cost of cleaning work. Summary of the Utility Model

[0005] The purpose of the utility model is to provide an anti-blocking slope grouting drill bit to solve the problems raised in the above background technique.

[0006] To achieve the above purpose, the utility model provides the following technical solutions:

[0007] An anti-blocking slope grouting drill bit includes a grouting pipe and a grouting drill tool. The grouting drill tool is threadedly installed at the bottom end of the grouting pipe, and a grouting channel for providing grouting flow is opened in the inner cavities of both.

[0008] The grouting drill tool is composed of a drill pipe and a drill bit. The top end of the drill pipe is threadedly connected to the grouting pipe, and the bottom end of the drill pipe is threadedly connected to the drill bit.

[0009] A sealing structure for preventing grout backflow is fixedly installed in the inner cavity of the drill pipe, and an adjusting structure for preventing the grouting channel from being blocked is slidably installed at the bottom end of the drill bit.

[0010] As a further solution of the present utility model, the sealing structure includes a fixed pipe, the fixed pipe is fixedly installed in the inner cavity of the drill pipe by bolts, a sealing block for preventing slurry backflow is slidably installed on the outside of the fixed pipe, a piston pipe is fixedly installed in the inner cavity of the fixed pipe, and the piston pipe is fixedly connected to the sealing block through an air injection pipe.

[0011] As a further solution of the present utility model, a driving disc for driving the sealing block to move is slidably installed in the inner cavity of the piston pipe, a transmission folding frame is fixedly connected to the outer wall of the driving disc, and it is fixedly connected to the sealing block.

[0012] As a further solution of the present utility model, a partition plate is fixedly installed in the inner cavity of the piston pipe, a push rod is slidably installed in the inner cavity of the partition plate, and a piston block is fixedly connected to the top end of the push rod.

[0013] As a further solution of the present utility model, the adjusting structure includes a moving block, the moving block is slidably installed at the bottom end of the inner cavity of the drill bit, a sealing plate for preventing grout leakage is fixedly installed at the top end of the moving block, a transmission rod for driving the moving block to move up and down is fixedly installed at the top end of the sealing plate, and the top end of the transmission rod is fixedly connected to the driving disc.

[0014] Compared with the prior art, the beneficial effects of the present utility model are:

[0015] 1. When the present utility model is used, the driving disc is driven by the electric rod in the sealing structure, the sealing block is driven by the transmission folding frame to expand or contract along the moving groove, and the adaptive adjustment is realized in cooperation with the piston pipe and the air injection pipe, which can closely fit the inner wall of the grouting hole with different diameters to form an effective seal, effectively reduce the risk of slurry flowing back out of the hole along the drill hole due to poor sealing, enhance the grouting reinforcement effect, enable the slope rock and soil mass to be fully reinforced, and ensure the stability of the grouting pressure and the reinforcement effect to a certain extent.

[0016] 2. When the present utility model is used, through the double protection mechanism of the moving block and the sealing plate, in the non-grouting stage, the sealing plate fits the bottom of the inverted conical grouting channel to prevent the leakage of residual slurry, and the sharp moving block extends out to block debris from entering to avoid blockage. Compared with the traditional drill bit, the blockage caused by debris accumulation or slurry solidification is greatly reduced, the grouting operation is ensured to proceed continuously, the construction efficiency is improved, and the additional cost and time loss caused by dredging the drill bit are reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of an anti-blocking slope grouting drill bit.

[0018] Figure 2 It is an exploded view of the overall structure of an anti-blocking slope grouting bit.

[0019] Figure 3 It is a cross-sectional view of the grouting tool in an anti-blocking slope grouting bit.

[0020] Figure 4 It is an exploded view of the sealing structure in an anti-blocking slope grouting bit.

[0021] Figure 5 It is a cross-sectional view of the sealing structure in an anti-blocking slope grouting bit.

[0022] In the figure: 1, grouting pipe; 2, grouting tool; 201, drill pipe; 202, drill bit; 3, grouting channel; 4, connecting pipe; 501, fixed pipe; 502, sealing block; 503, piston pipe; 504, air injection pipe; 505, driving disc; 506, moving frame; 507, connecting frame; 508, turning shaft; 509, electric rod; 510, partition board; 511, pushing rod; 512, piston block; 601, moving block; 602, sealing plate; 603, transmission rod. Specific implementation mode

[0023] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0024] Embodiment 1: Please refer to Figure 1 , Figure 2 , an anti-blocking slope grouting bit, comprising a grouting pipe 1 and a grouting tool 2. The grouting tool 2 is threadedly installed at the bottom end of the grouting pipe 1, and a grouting channel 3 for providing grouting flow is opened in the inner cavities of both;

[0025] The grouting tool 2 is composed of a drill pipe 201 and a drill bit 202. The top end of the drill pipe 201 is threadedly connected to the grouting pipe 1, and the bottom end of the drill pipe 201 is threadedly connected to the drill bit 202;

[0026] A sealing structure for preventing grouting backflow is fixedly installed in the inner cavity of the drill pipe 201, and an adjusting structure for preventing the grouting channel 3 from being blocked is slidably installed at the bottom end of the drill bit 202;

[0027] Specifically, the grouting pipe 1 and the grouting drill tool 2 are threadedly connected, which can achieve a tight bite at the connection between the two, prevent slurry leakage during grouting, ensure the sealing of the grouting channel 3, avoid affecting the grouting pressure and effect. The relatively large friction generated by the bite provides sufficient strength and stability at the connection, can withstand the grouting pressure, prevent pipeline rupture or connection failure. At the same time, the operation is simple, no complex tools are required, and the construction personnel can quickly complete the installation and disassembly of the grouting drill tool 2, which is beneficial to reducing costs and improving efficiency, and also facilitates component replacement during equipment transportation, storage and maintenance;

[0028] More specifically, a connecting pipe 4 that is convenient for installation or disassembly is sleeved on the outer wall of the grouting pipe 1 with threads, and the connecting pipe 4 is located on the outer wall of the grouting drill tool 2 and the grouting pipe 1 on the corresponding side. The overall shape of the drill bit 202 is a frustum of a cone with a wider upper part and a narrower lower part. There are multiple ribbed protrusions on the upper part, gradually converging towards the bottom, and the bottom is a sharp cone shape, which is beneficial for more smoothly drilling into the rock and soil mass during slope grouting operations.

[0029] Please refer to Figure 3 、 Figure 4 、 Figure 5 , the sealing structure includes a fixed pipe 501. The fixed pipe 501 is fixedly installed in the inner cavity of the drill pipe 201 by bolts. A sealing block 502 for preventing slurry backflow is slidably installed outside the fixed pipe 501. A plurality of sealing blocks 502 are provided and symmetrically and evenly distributed on the outer surface of the fixed pipe 501. A piston pipe 503 is fixedly installed in the inner cavity of the fixed pipe 501, and the piston pipe 503 and the sealing block 502 are fixedly connected through an air injection pipe 504;

[0030] Specifically, a moving groove is opened in the inner cavity of the fixed pipe 501 to provide space for the movement of the sealing block 502. The sealing block 502 is placed in the moving groove, and its surface is provided with an inclined surface. Chamfers corresponding to the inclined surface of the sealing block 502 are provided on both the upper and lower sides of the moving groove in contact with the sealing block 502, which can enable the sealing block 502 to smoothly expand or contract in the moving groove;

[0031] More specifically, one end of the air injection pipe 504 penetrates the fixed pipe 501 and is connected to the inner cavity of the piston pipe 503, and the other end is fixedly connected to the sealing block 502. One end of the air injection pipe 504 close to the sealing block 502 is set as a folding pipe to facilitate adapting to the expansion or contraction of the sealing block 502;

[0032] A driving disk 505 for driving the sealing block 502 to move is slidably installed in the inner cavity of the piston pipe 503. A transmission folding frame is fixedly connected to the outer wall of the driving disk 505, and it is fixedly connected to the sealing block 502;

[0033] Specifically, there are multiple transmission folding frames which are respectively fixedly connected to the inner walls of each sealing block 502. Each transmission folding frame is divided into a moving frame 506, a connecting frame 507 and a turning shaft 508. Among them, the moving frame 506 slides on the outer wall of the fixed pipe 501. A sliding groove for providing sliding of the moving frame 506 is formed on the outer wall of the fixed pipe 501, and the moving frame 506 is located in the sliding groove. The driving disk 505 sequentially passes through the piston pipe 503 and the fixed pipe 501 and is fixedly connected to the moving frame 506. The connecting frame 507 is fixedly installed on the inner wall of the sealing block 502. There are two turning shafts 508 in total, and they are rotatably installed between the moving frame 506 and the connecting frame 507 through pin shafts;

[0034] More specifically, an electric rod 509 for providing power is fixedly installed inside the piston pipe 503, and the driving disk 505 is fixedly sleeved on the outer wall of the top end of the electric rod 509;

[0035] A partition 510 is fixedly installed in the inner cavity of the piston pipe 503. The inner cavity of the piston pipe 503 is divided into two parts by the partition 510. The upper part of the inner cavity of the piston pipe 503 is set as an air injection cavity for injecting air into the sealing block 502, and the electric rod 509 is located in the lower part of its inner cavity. A push rod 511 is slidably installed in the inner cavity of the partition 510, and a piston block 512 is fixedly connected to the top end of the push rod 511;

[0036] Specifically, the bottom end of the push rod 511 is fixedly connected to the output end of the electric rod 509. Sealing rings for preventing gas leakage are fixedly installed on both the upper and lower sides of the partition 510, and the sealing rings are slidably sleeved on the outer surface of the push rod 511;

[0037] More specifically, the sealing block 502 is composed of a silica gel airbag, and a pressure sensor is arranged inside it. After the sealing block 502 closely fits the inner wall of the grouting hole, the pressure sensor transmits a signal to the electric rod 509 to control its stop of movement. The electric rod 509 is connected to an external controller via Bluetooth, thereby controlling the operation of the electric rod 509.

[0038] Embodiment 2: Please refer to Figure 1 、 Figure 2 、 Figure 3 , on the basis of combining Embodiment 1, the adjusting structure includes a moving block 601. The moving block 601 is slidably installed at the bottom end of the inner cavity of the drill bit 202. A sealing plate 602 for preventing grouting leakage is fixedly installed at the top end of the moving block 601. A transmission rod 603 for driving the moving block 601 to move up and down is fixedly installed at the top end of the sealing plate 602, and the top end of the transmission rod 603 is fixedly connected to the driving disk 505;

[0039] Specifically, the moving block 601 is set as a sharp conical structure, and the grouting channel 3 in the inner cavity of the drill bit 202 is set as an inverted cone, and the inner diameter of the bottom of the grouting channel 3 is smaller than the diameter of the sealing plate 602, so as to form a double protection mechanism. On the one hand, during the non-grouting stage, the sealing plate 602 closely fits the bottom of the grouting channel 3, effectively preventing the residual slurry in the drill bit 202 from leaking. On the other hand, the sharp moving block 601 extends outwards, acting as a barrier to block the debris generated by drilling from entering the inside of the drill bit 202, preventing the risk of blockage. At the same time, when the electric rod 509 drives the driving disc 505 to move upwards, the transmission rod 603 is linked accordingly, precisely controlling the movement of the sealing plate 602, and prompting the sharp moving block 601 to retract into the inner cavity of the drill bit 202, so as to quickly restore the smoothness of the grouting channel 3 and ensure the smooth progress of the grouting operation.

[0040] The working principle of the present utility model is as follows:

[0041] First, by rotating the connecting pipe 4, the grouting drill 2 and the grouting pipe 1 are assembled. At the same time, the top end of the grouting pipe 1 is fixedly connected to the driving device, and then the whole device is driven to rotate to achieve the drilling effect.

[0042] After the grouting hole is drilled, the grouting equipment injects slurry into the grouting channel 3 through the grouting pipe 1. Under the action of pressure, the slurry is injected into the cracks or pores of the slope through the drill bit 202, so as to improve the physical and mechanical properties of the slope rock and soil mass. At the same time, the electric rod 509 is started to push the driving disc 505 to move upwards. The driving disc 505 drives the sealing block 502 to expand outwards along the moving groove of the fixed pipe 501 through the transmission folding frame (composed of the moving frame 506, the connecting frame 507 and the turning shaft 508), so that the sealing block 502 closely fits the inner wall of the grouting hole to form an effective seal. And during the upward movement of the driving disc 505, the air injection pipe 504 is driven to control the push rod 511 to drive the piston block 512 to move upwards in the piston pipe 503. The gas in the air injection cavity of the piston pipe 503 is injected into the sealing block 502 by using the piston block 512, so that the sealing block 502 expands, further assisting the sealing block 502 to fit the inner wall of the grouting hole to form a seal and prevent grouting backflow. At the same time, the up and down movement of the piston block 512 realizes the air injection or air extraction of the sealing block 502, so as to precisely control the expansion size of the sealing block 502, so that each sealing block 502 is always closely fitted during both the expansion and contraction processes, in order to prevent the debris generated by drilling from entering the drill pipe 201.

[0043] In the non-grouting stage, the sharp conical structure of the moving block 601 extends outwards to prevent the debris generated by drilling from entering the interior of the drill bit 202. At the same time, the sealing plate 602 closely fits the bottom of the inverted conical grouting channel 3 to prevent the leakage of residual slurry. When grouting is required, the electric rod 509 drives the driving disc 505 to move upwards, and the transmission rod 603 is linked to drive the sealing plate 602 and the moving block 601 to retract into the inner cavity of the drill bit 202, restoring the smoothness of the grouting channel 3, so that the slurry can smoothly pass through the drill bit 202 and be injected into the slope rock and soil mass.

[0044] The above is only the preferred specific implementation manner of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model, according to the technical solution of the present utility model and its inventive concept, makes equivalent substitutions or changes, and should be covered within the protection scope of the present utility model.

Claims

1. An anti-blocking slope grouting drill bit, comprising a grouting pipe (1) and a grouting drill tool (2), characterized in that, The grouting drill tool (2) is threadedly installed at the bottom end of the grouting pipe (1), and a grouting channel (3) for providing grouting flow is provided in the inner cavities of both of them; The grouting drill tool (2) is composed of a drill pipe (201) and a drill bit (202). The top end of the drill pipe (201) is threadedly connected to the grouting pipe (1), and the bottom end of the drill pipe (201) is threadedly connected to the drill bit (202); A sealing structure for preventing grouting backflow is fixedly installed in the inner cavity of the drill pipe (201), and an adjusting structure for preventing the grouting channel (3) from being blocked is slidably installed at the bottom end of the drill bit (202).

2. The anti-blocking slope grouting drill bit according to claim 1, characterized in that, The sealing structure includes a fixed pipe (501). The fixed pipe (501) is fixedly installed in the inner cavity of the drill pipe (201) by bolts. A sealing block (502) for preventing the slurry from flowing back is slidably installed on the outside of the fixed pipe (501). A piston pipe (503) is fixedly installed in the inner cavity of the fixed pipe (501), and the piston pipe (503) is fixedly connected to the sealing block (502) through an air injection pipe (504).

3. The anti-blocking slope grouting drill bit according to claim 2, characterized in that, A driving disc (505) for driving the sealing block (502) to move is slidably installed in the inner cavity of the piston pipe (503). A transmission folding frame is fixedly connected to the outer wall of the driving disc (505), and it is fixedly connected to the sealing block (502).

4. The anti-blocking slope grouting drill bit according to claim 3, characterized in that, A partition plate (510) is fixedly installed in the inner cavity of the piston pipe (503). A push rod (511) is slidably installed in the inner cavity of the partition plate (510), and the top end of the push rod (511) is fixedly connected to a piston block (512).

5. The anti-blocking slope grouting drill bit according to claim 1, characterized in that, The adjusting structure includes a moving block (601). The moving block (601) is slidably installed at the bottom end of the inner cavity of the drill bit (202). A sealing plate (602) for preventing grouting leakage is fixedly installed at the top end of the moving block (601). A transmission rod (603) for driving the moving block (601) to move up and down is fixedly installed at the top end of the sealing plate (602), and the top end of the transmission rod (603) is fixedly connected to the driving disc (505).

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