Anchor rod grouting equipment and grouting method

Abstract

The invention discloses anchor rod grouting equipment and a grouting method, relates to the technical field of anchor rod grouting, and solves the technical problem that the blocking effect of a drill hole is easily affected when the pressure of grout in the drill hole is relatively high. Comprising a grouting cylinder, a communicating pipe is installed on the cylinder wall of the grouting cylinder, a stop-grouting plug is movably installed on the communicating pipe, a threaded sleeve used for limiting the position of the stop-grouting plug is installed on the communicating pipe in a threaded mode, an elastic sealing piece is installed in the grouting cylinder, and when grout in the grouting cylinder compresses the elastic sealing piece, the grout is guided into a self-drilling anchor rod through the communicating pipe. A rotating piece is installed at the outer end of the grouting barrel, the elastic sealing piece is used for driving the rotating piece to rotate when compressed, and a screwing locking mechanism is installed between the rotating piece and the threaded sleeve. According to the invention, the threaded sleeve for limiting the position of the stop-grouting plug can be conveniently locked, so that the threaded sleeve is not loosened, screwing force can be conveniently provided for the threaded sleeve all the time in the grouting process, the stop-grouting plug is ensured to be always kept in a tight propping state with the orifice of a drill hole, and thus the phenomenon of grout return is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of anchor rod grouting, and particularly relates to an anchor rod grouting device and a grouting method. Background Art

[0002] Grouting of self-drilling anchor rods has multiple significances, mainly including: injecting slurry directly into the borehole through the hollow rod body, and the slurry quickly fills the cracks in the rock and soil mass and solidifies to form an anchor solid, thereby enhancing the bonding force between the anchor rod and the surrounding medium, and improving the anti-pulling bearing capacity and tensile capacity of the anchor rod; grouting can stabilize the borehole wall, especially prevent the borehole from collapsing in easily caving strata, and at the same time isolate the moisture and corrosive substances from eroding the anchor rod, extending its service life; in addition, the grouting pressure can improve the structure of the fractured rock mass, reinforce the surrounding rock and improve its overall stability, and at the same time achieve effective restraint and support for the geological structure through the synergistic effect of the free section and the anchorage section. Moreover, the hollow design of the self-drilling anchor rod combined with the grouting process simplifies the traditional construction process of separating drilling, grouting, and anchoring, improves the construction efficiency and adapts to narrow spaces and complex strata conditions, and ultimately ensures the safety and long-term stability of the engineering structure.

[0003] In the patent with the Chinese patent publication number CN119243719B, an environmentally friendly gravel slope anchor rod grouting device for reducing slurry backflow is disclosed. Through a self-advancing anchor rod, an elastic seal, a limit piece, and an adjusting piece, by rotating the adjusting piece, the limit piece can be pushed towards the position of the elastic seal, so that the elastic seal fits on the orifice of the borehole to prevent the slurry from overflowing when it does not reach the predetermined position, thereby effectively preventing the slurry from backflowing through the gap between the self-advancing anchor rod and the borehole wall; however, the following defects still exist in this technical solution:

[0004] Although the adjusting piece connected by threads cooperates with the limit piece to make the elastic seal fit the orifice of the borehole, however, as the slurry in the borehole is continuously injected, the internal pressure will gradually increase. When the internal pressure in the borehole is relatively large, the adjusting piece installed by threads is likely to become loose, thereby affecting the sealing effect of the borehole orifice. Summary of the Invention

[0005] The purpose of the present invention is to provide an anchor rod grouting device and a grouting method, which solve the problem that the sealing effect of the borehole is easily affected when the slurry pressure in the borehole is relatively large.

[0006] The purpose of the present invention can be achieved by the following technical solutions:

[0007] In the first aspect of the present invention, an anchor grouting device is provided, which includes a grouting cylinder. A communicating pipe is installed on the cylinder wall of the grouting cylinder. A grout stopper is movably installed on the communicating pipe, and a threaded sleeve for limiting the position of the grout stopper is threadedly installed on the communicating pipe. An elastic seal is installed in the grouting cylinder. When the slurry in the grouting cylinder compresses the elastic seal, the slurry is introduced into the self-drilling anchor through the communicating pipe. A rotating member is installed at the outer end of the grouting cylinder. When the elastic seal is compressed, it is used to drive the rotating member to rotate. A rotation locking mechanism is installed between the rotating member and the threaded sleeve. When the elastic seal drives the rotating member, the rotation locking mechanism not only locks the rotational freedom of the threaded sleeve, but also always provides a tightening force to the threaded sleeve.

[0008] As a further solution of the present invention: The elastic seal includes a push rod with a spiral slider, a sealing ring, an annular block, and a spring. The annular block is arranged in the grouting cylinder. The sealing ring is fixedly sleeved on the annular block, and the annular block is slidably connected to the inner cylinder wall of the grouting cylinder through the sealing ring. One end of the push rod is coaxially fixedly connected to the annular block, and the other end of the push rod slidably penetrates through the end of the grouting cylinder and extends outward. The spiral slider is fixedly installed on the rod wall of the push rod away from the annular block. The spring is sleeved on the push rod, and the two ends of the spring are respectively connected to the inner end of the grouting cylinder and the side wall of the annular block.

[0009] As a further solution of the present invention: The communicating pipe includes an L-shaped pipe with a threaded portion, a docking pipe, and a connector. The top of the vertical portion of the L-shaped pipe is connected to the outer cylinder wall of the grouting cylinder, and the L-shaped pipe communicates with the inner cavity of the grouting cylinder. The threaded portion is arranged on the horizontal portion of the L-shaped pipe. The threaded sleeve is threadedly sleeved on the threaded portion. The docking pipe is fixedly communicated with the end of the L-shaped pipe away from the grouting cylinder, and the docking pipe is connected to the end of the self-drilling anchor through the connector.

[0010] As a further solution of the present invention: The rotating member includes a rotating cylinder with a spiral chute and a fixed ring. The fixed ring is coaxially installed at the outer end of the grouting cylinder. The rotating cylinder is slidably sleeved on the push rod at the outer side of the grouting cylinder. One end of the rotating cylinder close to the grouting cylinder is rotatably connected to the inner ring of the fixed ring through a first bearing. The spiral chute is opened on the inner cylinder wall of the rotating cylinder. The spiral slider is located in the spiral chute, and when the spiral slider slides along the spiral chute, it is used to drive the rotating cylinder to rotate.

[0011] As a further solution of the present invention: The rotation locking mechanism includes a synchronous moving member, a linkage assembly, an external gear ring, and an incomplete gear. The synchronous moving member is installed between the rotating cylinder and the threaded sleeve. The linkage assembly is installed on the synchronous moving member. The linkage assembly is used to drive the incomplete gear to rotate synchronously when the rotating cylinder rotates. The external gear ring is sleeved on the threaded sleeve, and the external gear ring is connected to the synchronous moving member. The incomplete gear is located above the external gear ring, and the incomplete gear is connected to the synchronous moving member through the linkage assembly.

[0012] As a further solution of the present invention: The synchronous moving member includes a collar, a moving plate, and a rotating ring with a limiting key. The collar is rotatably sleeved on the threaded sleeve through a second bearing. The external gear ring is coaxially and fixedly connected to the rotating ring. The moving plate is connected to the top of the rotating ring. The rotating ring is rotatably installed above the moving plate. The limiting key is fixedly installed on the inner ring of the rotating ring. A key groove for the limiting key to slide is provided on the outer cylinder wall of the rotating cylinder.

[0013] As a further solution of the present invention: The linkage assembly includes an upper sprocket, a lower sprocket, a chain, and a rotating pin. The upper sprocket is sleeved on the outside of the rotating cylinder, and the upper sprocket is coaxially connected to the rotating ring. The rotating pin is rotatably installed on the side wall of the moving plate. The incomplete gear is fixedly sleeved on the end of the rotating pin away from the moving plate. The lower sprocket is fixedly sleeved on the rotating pin, and the lower sprocket is located between the incomplete gear and the moving plate. The chain is jointly sleeved on the upper sprocket and the lower sprocket.

[0014] As a further solution of the present invention: The height of the sealing ring is greater than the inner diameter of the pipe orifice at the end of the connecting pipe close to the grouting cylinder. When the annular block does not move, the sealing ring covers the pipe orifice of the connecting pipe.

[0015] As a further solution of the present invention: One end of the grouting cylinder away from the rotating member is connected to a grouting pipe. One end of the grouting pipe away from the grouting cylinder is connected to a flexible pipe. A valve and a pressure gauge are sequentially installed on the grouting pipe.

[0016] The second aspect of the present invention provides a method for grouting an anchor rod, which is applied to the above-mentioned anchor rod grouting equipment, and includes the following steps:

[0017] Step 1: After connecting one end of the connecting pipe to the self-drilling anchor rod inserted into the drill hole and communicating them, adjust the position of the grout plug to block the orifice of the drill hole, and then rotate the threaded sleeve to move along the connecting pipe until the end of the threaded sleeve abuts tightly against the grout plug.

[0018] Step 2: Inject the grout into the grouting cylinder, and use the pressure generated by the grouting to compress the elastic sealing member, so that the grout in the grouting cylinder can enter the drill hole through the connecting pipe and the self-drilling anchor rod.

[0019] Step three: When the elastic sealing part is compressed, the rotating part is driven to rotate. During the rotation of the rotating part, the locking mechanism is tightened and the position of the threaded sleeve is locked by the locking mechanism. The locking mechanism is kept in a tightened state, so that the slurry stop plug is always pressed against the borehole without loosening and the borehole does not have slurry return phenomenon.

[0020] Beneficial effects of the present invention:

[0021] 1. In the present invention, pressure is generated by injecting slurry into the grouting barrel, thereby facilitating compression of the elastic seal. The compressed elastic seal can not only drive the rotating part to rotate, but also cancel the blocking effect on the connecting pipe, so that the slurry in the grouting barrel can enter the borehole through the connecting pipe and the self-drilling anchor rod, thereby realizing grouting.

[0022] 2. In the present invention, the borehole opening is conveniently sealed by the slurry stop plug on the connecting pipe, and the threaded sleeve is conveniently moved along the connecting pipe by rotating. The threaded sleeve can be used to resist the slurry stop plug at the hole opening, so as to facilitate limiting the position of the slurry stop plug. The pressure generated by injecting slurry into the grouting barrel compresses the elastic sealing member, and the compressed elastic sealing member is convenient to be linked to the rotating member for rotation, and the rotating member can be linked to the tightening locking mechanism. The tightening locking mechanism can not only limit the rotational freedom of the threaded sleeve so that it will not loosen after resisting the slurry stop plug, but also facilitate continuous provision of tightening force to the threaded sleeve during the grouting process, ensuring that the threaded sleeve and the slurry stop plug are always in a state of resistance, thereby effectively ensuring the sealing effect of the borehole opening.

[0023] 3. In the present invention, the pressure generated by the grouting tube during grouting is used as the power source for driving the tightening and locking mechanism, which not only makes it difficult for the threaded sleeve to loosen after it is pressed against the grouting plug, but also makes it possible for the threaded sleeve to continuously squeeze the grouting plug during the grouting process, so that the grouting plug can maintain a close fit with the borehole mouth, making it difficult for the slurry injected into the borehole to flow out from the borehole mouth, thereby effectively avoiding the phenomenon of grouting back in the borehole due to the loosening of the grouting plug. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present invention will be further described below in conjunction with the accompanying drawings.

[0025] Figure 1 It is a stereoscopic diagram of an anchor grouting device of the present invention;

[0026] Figure 2 It is a cutaway perspective view of an anchor grouting device of the present invention;

[0027] Figure 3 It is a stereoscopic diagram of an anchor grouting device of the present invention after docking with a self-drilling anchor;

[0028] Figure 4It is a three-dimensional diagram of an elastic sealing member in an anchor grouting device of the present invention;

[0029] Figure 5 It is a three-dimensional diagram of the connection in an anchor grouting device of the present invention;

[0030] Figure 6 It is a stereoscopic diagram of a rotating part in an anchor grouting device of the present invention;

[0031] Figure 7 It is a three-dimensional diagram of a rotating part in an anchor grouting device of the present invention after being cut open;

[0032] Figure 8 It is a stereoscopic diagram of the connection part between the tightening locking mechanism, the threaded sleeve and the rotating member in an anchor grouting device of the present invention;

[0033] Figure 9 It is a stereoscopic diagram of a synchronous moving part in an anchor grouting device of the present invention;

[0034] Figure 10 It is a stereoscopic diagram of the connection part between the incomplete gear and the linkage assembly in the anchor grouting equipment of the present invention.

[0035] In the figure: 1. grouting cylinder; 2. connecting pipe; 21. threaded part; 22. L-shaped pipe; 23. butt pipe; 24. connector; 3. grouting plug; 4. threaded sleeve; 5. elastic sealing member; 51. spiral slider; 52. push rod; 53. sealing ring; 54. annular block; 55. spring; 6. self-drilling anchor rod; 7. rotating member; 71. spiral slide groove; 72. rotating drum; 73. fixing ring; 74. keyway; 8. tightening locking mechanism; 81. synchronous moving member; 811. sleeve ring; 812. moving plate; 813. limit key; 814. swivel; 82. linkage assembly; 821. upper sprocket; 822. lower sprocket; 823. chain; 824. rotating pin; 83. outer gear ring; 84. incomplete gear; 9. grouting pipe; 10. hose; 11. valve; 12. pressure gauge. DETAILED DESCRIPTION

[0036] The technical scheme of the present invention will be described clearly and completely in conjunction with the embodiments below. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] like Figures 1-10As shown in the figure, the present invention is an anchor grouting device, which includes a grouting cylinder 1. A communicating pipe 2 is installed on the cylinder wall of the grouting cylinder 1. A grout stopper 3 is movably installed on the communicating pipe 2, and a threaded sleeve 4 for limiting the position of the grout stopper 3 is threadedly installed on the communicating pipe 2. An elastic seal 5 is installed in the grouting cylinder 1. When the slurry in the grouting cylinder 1 compresses the elastic seal 5, the slurry is introduced into the self-drilling anchor 6 through the communicating pipe 2. A rotating member 7 is installed at the outer end of the grouting cylinder 1. When the elastic seal 5 is compressed, it is used to drive the rotating member 7 to rotate. A rotation locking mechanism 8 is installed between the rotating member 7 and the threaded sleeve 4. When the elastic seal 5 drives the rotating member 7, through the rotation locking mechanism 8, not only the rotational freedom of the threaded sleeve 4 is locked, but also a tightening force is always provided to the threaded sleeve 4.

[0038] It should be noted that during use, the communicating pipe 2 is docked and connected to the self-drilling anchor 6 inserted into the drill hole. The position of the grout stopper 3 on the communicating pipe 2 is adjusted so that the grout stopper 3 blocks the orifice of the drill hole. Then the threaded sleeve 4 is rotated so that its end abuts against the grout stopper 3, thereby limiting the position of the grout stopper 3. Finally, slurry is pumped into the grouting cylinder 1. During the process of pumping the slurry, the elastic seal 5 will be squeezed and compressed. When the elastic seal 5 is compressed, it drives the rotating member 7 to rotate. When the rotating member 7 rotates, it will drive the rotation locking mechanism 8. The rotation locking mechanism 8 not only locks the rotational freedom of the threaded sleeve 4 to prevent it from loosening, but also can always provide a tightening force to the threaded sleeve 4 during the grouting process, so that the threaded sleeve 4 always presses against the grout stopper 3 during the grouting process, thereby effectively ensuring the plugging effect and avoiding the phenomenon of slurry backflow.

[0039] As Figure 2 and Figure 4 shown, the elastic seal 5 includes a push rod 52 with a spiral slider 51, a sealing ring 53, an annular block 54 and a spring 55. The annular block 54 is arranged in the grouting cylinder 1. The sealing ring 53 is fixedly sleeved on the annular block 54, and the annular block 54 is slidably connected to the inner cylinder wall of the grouting cylinder 1 through the sealing ring 53. One end of the push rod 52 is coaxially and fixedly connected to the annular block 54, and the other end of the push rod 52 slidably penetrates through the end of the grouting cylinder 1 and extends outward. The spiral slider 51 is fixedly installed on the rod wall of the push rod 52 at the end far from the annular block 54. The spring 55 is sleeved on the push rod 52, and both ends of the spring 55 are respectively connected to the inner end of the grouting cylinder 1 and the side wall of the annular block 54.

[0040] It should be noted that when the grouting cylinder 1 is not grouting, the sealing ring 53 covers the top pipe orifice of the communicating pipe 2. That is to say, when the slurry is just injected into the grouting cylinder 1, due to its low pressure, the slurry in the grouting cylinder 1 cannot enter the communicating pipe 2 at this time (as Figure 1As shown in the figure, within the range shown, as the amount of slurry injected into the grouting cylinder 1 continuously increases, the pressure generated by it also gradually increases, thereby squeezing the elastic seal 5, causing the annular block 54 to drive the sealing ring 53 to slide along the inner wall of the grouting cylinder 1, and at the same time driving the push rod 52 to move synchronously and compress the spring 55, thereby using the pressure generated by grouting as the power source for driving the elastic seal 5.

[0041] As Figure 3 and Figure 5 shown, the connecting pipe 2 includes an L-shaped pipe 22 with a threaded portion 21, a docking pipe 23, and a connector 24. The top of the vertical portion of the L-shaped pipe 22 is connected to the outer cylinder wall of the grouting cylinder 1, and the L-shaped pipe 22 is in communication with the inner cavity of the grouting cylinder 1. The threaded portion 21 is provided on the horizontal portion of the L-shaped pipe 22. The threaded sleeve 4 is threadedly sleeved with the threaded portion 21. The docking pipe 23 is fixedly connected to the end of the L-shaped pipe 22 away from the grouting cylinder 1, and the docking pipe 23 is connected to the end of the self-drilling anchor 6 through the connector 24.

[0042] It should be noted that the outer diameter of the horizontal portion of the L-shaped pipe 22 is equal to the outer diameter of the docking pipe 23. The threaded portion 21 facilitates the lateral movement of the threaded sleeve 4 when it is rotated, thereby limiting the position of the grout plug 3, so that the slurry in the drill hole will not push open the grout plug 3. The connector 24 facilitates the docking and connection of the docking pipe 23 with the end of the self-drilling anchor 6. In this embodiment, the connector 24 is threadedly connected to the end of the self-drilling anchor 6, and a sealing gasket is installed inside the connector 24 to prevent slurry leakage after docking with the self-drilling anchor 6.

[0043] As Figure 1 and Figures 6-7 shown, the rotating member 7 includes a rotating cylinder 72 with a spiral chute 71 and a fixed ring 73. The fixed ring 73 is coaxially installed at the outer end of the grouting cylinder 1. The rotating cylinder 72 is slidably sleeved with the push rod 52 on the outer side of the grouting cylinder 1. One end of the rotating cylinder 72 close to the grouting cylinder 1 is rotatably connected to the inner ring of the fixed ring 73 through a first bearing. The spiral chute 71 is opened on the inner cylinder wall of the rotating cylinder 72. The spiral slider 51 is located in the spiral chute 71, and when the spiral slider 51 slides along the spiral chute 71, it is used to drive the rotating cylinder 72 to rotate.

[0044] It should be noted that the spiral chute 71 is spirally distributed along the length direction of the rotating cylinder 72. The fixed ring 73 and the first bearing not only facilitate the rotation of the rotating cylinder 72, but also ensure the stability of the position of the rotating cylinder 72. The spiral trajectory of the spiral slider 51 partially overlaps with the spiral trajectory of the spiral chute 71, ensuring that when the push rod 52 moves along the rotating cylinder 72, the spiral extrusion force of the spiral slider 51 squeezes the spiral chute 71, thereby causing the rotating cylinder 72 to rotate.

[0045] As Figure 1 and Figure 8As shown, the rotation locking mechanism 8 includes a synchronous moving member 81, a linkage assembly 82, an external gear ring 83, and an incomplete gear 84. The synchronous moving member 81 is installed between the rotating cylinder 72 and the threaded sleeve 4. The linkage assembly 82 is installed on the synchronous moving member 81. The linkage assembly 82 is used to drive the incomplete gear 84 to rotate synchronously when the rotating cylinder 72 rotates. The external gear ring 83 is sleeved on the threaded sleeve 4, and the external gear ring 83 is connected to the synchronous moving member 81. The incomplete gear 84 is located above the external gear ring 83, and the incomplete gear 84 is connected to the synchronous moving member 81 through the linkage assembly 82.

[0046] It should be noted that in the initial state, the incomplete gear 84 is not meshed with the external gear ring 83. Only after the rotating cylinder 72 rotates a certain angle will it drive the incomplete gear 84 to mesh with the external gear ring 83. Since the position of the threaded sleeve 4 needs to be adjusted, the synchronous moving member 81 will not only not affect its movement, but also ensure that the incomplete gear 84 and the external gear ring 83 are always in a corresponding relationship during the movement. After the position of the threaded sleeve 4 is adjusted, only when the rotating cylinder 72 rotates a certain angle can the incomplete gear 84 still mesh with the external gear ring 83.

[0047] As Figures 8-9 shown, the synchronous moving member 81 includes a collar 811, a moving plate 812, and a rotating ring 814 with a limit key 813. The collar 811 is rotatably sleeved on the threaded sleeve 4 through a second bearing. The external gear ring 83 is coaxially and fixedly connected to the rotating ring 814. The moving plate 812 is connected to the top of the rotating ring 814. The rotating ring 814 is rotatably installed above the moving plate 812. The limit key 813 is fixedly installed on the inner ring of the rotating ring 814. A key groove 74 for the limit key 813 to slide is provided on the outer cylinder wall of the rotating cylinder 72.

[0048] It should be noted that the collar 811 and the second bearing can not only enable the threaded sleeve 4 to rotate normally, but also enable the threaded sleeve 4 to drive the collar 811 and the moving plate 812 to move synchronously. In this embodiment, the rotating ring 814 is movably sleeved on the rotating cylinder 72, and the rotating ring 814 and the moving plate 812 are rotatably connected through a third bearing. That is to say, when the threaded sleeve 4 rotates and moves, it will synchronously drive the rotating ring 814 to move along the rotating cylinder 72. With the limit key 813 and the key groove 74, it not only does not affect the movement of the rotating ring 814 along the rotating cylinder 72, but also enables the rotating cylinder 72 to drive the rotating ring 814 to rotate synchronously when rotating.

[0049] As Figure 8 and Figure 10As shown, the linkage assembly 82 includes an upper sprocket 821, a lower sprocket 822, a chain 823, and a rotating pin 824. The upper sprocket 821 is sleeved outside the rotating cylinder 72, and the upper sprocket 821 is coaxially connected to the rotating ring 814. The rotating pin 824 is rotatably installed at the side wall of the moving plate 812. The incomplete gear 84 is fixedly sleeved on the end of the rotating pin 824 away from the moving plate 812. The lower sprocket 822 is fixedly sleeved on the rotating pin 824, and the lower sprocket 822 is located between the incomplete gear 84 and the moving plate 812. The chain 823 is jointly sleeved with the upper sprocket 821 and the lower sprocket 822.

[0050] It should be noted that when the rotating cylinder 72 drives the rotating ring 814 (as Figure 9 shown) to rotate, the upper sprocket 821 will be driven to rotate accordingly. With the transmission of the chain 823, the lower sprocket 822 can drive the rotating pin 824 and the incomplete gear 84 to rotate synchronously. In this embodiment, the rotation angle of the rotating cylinder 72 driven by the grouting pressure can reach the rotation angle required when the incomplete gear 84 meshes with the external gear ring 83.

[0051] As Figure 2 and Figure 4 shown, the height of the sealing ring 53 is greater than the inner diameter of the pipe orifice at one end of the communicating pipe 2 (as Figure 1 shown) close to the grouting cylinder 1. When the annular block 54 does not move, the sealing ring 53 covers the pipe orifice of the communicating pipe 2.

[0052] It should be noted that the sealing ring 53 in this embodiment divides the interior of the grouting cylinder 1 into a left cavity and a right cavity. In the initial state, the sealing ring 53 covers the pipe orifice of the communicating pipe 2, which can ensure that the slurry will never enter the right cavity during the movement of the sealing ring 53.

[0053] As Figures 1-2 shown, a grouting pipe 9 is connected to one end of the grouting cylinder 1 away from the rotating member 7. One end of the grouting pipe 9 away from the grouting cylinder 1 is connected to a flexible pipe 10. A valve 11 and a pressure gauge 12 are sequentially installed on the grouting pipe 9.

[0054] It should be noted that the flexible pipe 10 is used to connect to an external grouting machine (not shown in the figure). The grouting machine can pump the slurry. This is the prior art and will not be elaborated here. The valve 11 in this embodiment is an electric control valve, and the electric control valve is electrically connected to an external controller (not shown in the figure). When the slurry in the drill hole is full, if grouting continues at this time, the pressure in the grouting pipe 9 will continue to increase. The pressure can be monitored by the pressure gauge 12, and the pressure gauge 12 is electrically connected to the external controller, which is convenient to link the valve 11 when the detected pressure reaches the set threshold, so that the injection of the slurry can be automatically stopped when the drill hole is completed with grouting.

[0055] An embodiment of the present invention provides a method for grouting an anchor rod, including the following steps:

[0056] Step 1: After connecting one end of the connecting pipe 2 to the self-drilling anchor rod 6 inserted into the borehole, adjust the position of the grout plug 3 to block the orifice of the borehole, and then rotate the threaded sleeve 4 to move along the connecting pipe 2 until the end of the threaded sleeve 4 abuts tightly against the grout plug 3;

[0057] Step 2: Inject the grout into the grouting cylinder 1, and use the pressure generated by grouting to compress the elastic seal 5, so that the grout in the grouting cylinder 1 can enter the borehole through the connecting pipe 2 and the self-drilling anchor rod 6;

[0058] Step 3: When the elastic seal 5 is compressed, it drives the rotating member 7 to rotate. During the rotation of the rotating member 7, the rotary locking mechanism 8 is linked. The position of the threaded sleeve 4 is locked by using the rotary locking mechanism 8 and kept in a tightened state, so that the grout plug 3 can always abut tightly against the borehole without loosening, and no grout return phenomenon occurs in the borehole.

[0059] The above has described an embodiment of the present invention in detail, but the content described is only the preferred embodiment of the present invention and cannot be considered as limiting the scope of implementation of the present invention. All equivalent changes and improvements made according to the scope of the application of the present invention shall still fall within the scope covered by the patent of the present invention.

Claims

1. An anchor grouting device, comprising a grouting cylinder (1), characterized in that, A connecting pipe (2) is installed on the wall of the grouting cylinder (1). A grout plug (3) is movably installed on the connecting pipe (2), and a threaded sleeve (4) for limiting the position of the grout plug (3) is threadedly installed on the connecting pipe (2). An elastic seal (5) is installed in the grouting cylinder (1). When the slurry in the grouting cylinder (1) compresses the elastic seal (5), the slurry is introduced into the self-drilling anchor rod (6) through the connecting pipe (2). A rotating member (7) is installed at the outer end of the grouting cylinder (1). When the elastic seal (5) is compressed, it is used to drive the rotating member (7) to rotate. A rotation locking mechanism (8) is installed between the rotating member (7) and the threaded sleeve (4). When the elastic seal (5) drives the rotating member (7), through the rotation locking mechanism (8), not only the rotational freedom of the threaded sleeve (4) is locked, but also a tightening force is always provided to the threaded sleeve (4).

2. An anchor grouting device according to claim 1, characterized in that, The elastic seal (5) includes a push rod (52) with a spiral slider (51), a sealing ring (53), an annular block (54), and a spring (55). The annular block (54) is arranged in the grouting cylinder (1). The sealing ring (53) is fixedly sleeved on the annular block (54), and the annular block (54) is slidably connected to the inner wall of the grouting cylinder (1) through the sealing ring (53). One end of the push rod (52) is coaxially and fixedly connected to the annular block (54), and the other end of the push rod (52) slidably penetrates through the end of the grouting cylinder (1) and extends outward. The spiral slider (51) is fixedly installed on the rod wall of the push rod (52) at the end away from the annular block (54). The spring (55) is sleeved on the push rod (52), and both ends of the spring (55) are respectively connected to the inner end of the grouting cylinder (1) and the side wall of the annular block (54).

3. The anchor rod grouting equipment according to claim 1, characterized in that, The connecting pipe (2) includes an L-shaped pipe (22) with a threaded portion (21), a butt joint pipe (23), and a connector (24). The top of the vertical portion of the L-shaped pipe (22) is connected to the outer wall of the grouting cylinder (1), and the L-shaped pipe (22) is communicated with the inner cavity of the grouting cylinder (1). The threaded portion (21) is arranged on the horizontal portion of the L-shaped pipe (22). The threaded sleeve (4) is threadedly connected to the threaded portion (21). The butt joint pipe (23) is fixedly communicated with the end of the L-shaped pipe (22) away from the grouting cylinder (1), and the butt joint pipe (23) is connected to the end of the self-drilling anchor rod (6) through the connector (24).

4. The anchor rod grouting device according to claim 2, characterized in that, The rotating member (7) includes a rotating drum (72) with a spiral groove (71) and a fixed ring (73), wherein the fixed ring (73) is coaxially mounted on the outer end of the grouting drum (1), the rotating drum (72) is slidably sleeved with a push rod (52) on the outer portion of the grouting drum (1), and one end of the rotating drum (72) close to the grouting drum (1) is rotatably connected to the inner ring of the fixed ring (73) via a first bearing, the spiral groove (71) is provided on the inner wall of the rotating drum (72), the spiral slider (51) is located in the spiral groove (71), and the spiral slider (51) is used to drive the rotating drum (72) to rotate when sliding along the spiral groove (71).

5. The anchor rod grouting device according to claim 4, characterized in that, The tightening and locking mechanism (8) comprises a synchronous moving member (81), a linkage assembly (82), an outer gear ring (83) and an incomplete gear (84); the synchronous moving member (81) is installed between a rotating drum (72) and a threaded sleeve (4); the linkage assembly (82) is installed on the synchronous moving member (81); the linkage assembly (82) is used to drive the incomplete gear (84) to rotate synchronously when the rotating drum (72) rotates; the outer gear ring (83) is sleeved on the threaded sleeve (4), and the outer gear ring (83) is connected to the synchronous moving member (81); the incomplete gear (84) is located above the outer gear ring (83), and the incomplete gear (84) is connected to the synchronous moving member (81) through the linkage assembly (82).

6. The anchor rod grouting device according to claim 5, characterized in that, The synchronous moving part (81) comprises a collar (811), a moving plate (812) and a rotating ring (814) with a limit key (813); the collar (811) is rotatably sleeved with a threaded sleeve (4) via a second bearing; the outer gear ring (83) is coaxially fixedly connected with the rotating ring (814); the moving plate (812) is connected to the top of the rotating ring (814); the rotating ring (814) is rotatably installed at a position above the moving plate (812); the limit key (813) is fixedly installed on the inner ring of the rotating ring (814); and a key groove (74) for the limit key (813) to slide is provided on the outer cylinder wall of the rotating cylinder (72).

7. An anchor grouting device according to claim 6, characterized in that, The linkage assembly (82) comprises an upper sprocket (821), a lower sprocket (822), a chain (823) and a rotating pin (824); the upper sprocket (821) is sleeved on the outer side of the rotating drum (72), and the upper sprocket (821) is coaxially connected with the rotating ring (814); the rotating pin (824) is rotatably mounted on the side wall of the movable plate (812); the incomplete gear (84) is fixedly sleeved with one end of the rotating pin (824) away from the movable plate (812); the lower sprocket (822) is fixedly sleeved on the rotating pin (824), and the lower sprocket (822) is located between the incomplete gear (84) and the movable plate (812); the chain (823) is sleeved with the upper sprocket (821) and the lower sprocket (822).

8. The anchor rod grouting equipment according to claim 2, characterized in that, The height of the sealing ring (53) is greater than the inner diameter of the pipe opening at one end of the connecting pipe (2) close to the grouting tube (1). When the annular block (54) does not move, the sealing ring (53) covers the pipe opening of the connecting pipe (2).

9. The anchor rod grouting equipment according to claim 1, characterized in that, One end of the grouting cylinder (1) away from the rotating member (7) is communicated with a grouting pipe (9). One end of the grouting pipe (9) away from the grouting cylinder (1) is communicated with a hose (10). A valve (11) and a pressure gauge (12) are sequentially installed on the grouting pipe (9).

10. A method for grouting an anchor rod, which is applied to the anchor rod grouting equipment described in any one of claims 1-9, is characterized in that It includes the following steps: Step 1: After docking and connecting one end of the connecting pipe (2) with the self-drilling anchor rod (6) inserted into the drill hole, adjust the position of the grout plug (3) to block the hole opening of the drill hole, and then rotate the threaded sleeve (4) to move along the connecting pipe (2) until the end of the threaded sleeve (4) abuts against the grout plug (3); Step 2: Inject the slurry into the grouting cylinder (1), and use the pressure generated by the grouting to compress the elastic seal (5), so that the slurry in the grouting cylinder (1) can enter the drill hole through the connecting pipe (2) and the self-drilling anchor rod (6); Step 3: When the elastic seal (5) is compressed, it drives the rotating member (7) to rotate. During the rotation of the rotating member (7), the rotation locking mechanism (8) is linked. The position of the threaded sleeve (4) is locked by using the rotation locking mechanism (8) and kept in a tightened state, so that the grout plug (3) can always abut against the drill hole without loosening, and no slurry backflow occurs in the drill hole.

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