A directional grouting device for mine tunnel reinforcement

Abstract

The present invention discloses a directional grouting device for reinforcing mine tunnels, which includes an outer sleeve and a grouting mechanism slidably arranged in the outer sleeve, wherein the left end of the outer sleeve is set to be conical, so that the outer sleeve can be adapted to be inserted into the borehole of the tunnel wall, and the grouting mechanism includes an anchor rod, the tail end of the anchor rod is connected to the grouting equipment by a grouting pipe, and the front end of the anchor rod is connected to the grouting head by a flow regulating pipe; a tensioning ring seat, the tensioning ring seat is fixedly sleeved on the side wall of the tail of the anchor rod, and the upper and lower ends of the tensioning ring seat are both installed with tensioning support mechanisms. In the device of the present invention, when the extrusion plate is rotated backward by extrusion, the connecting rod pushes the push rod inward, so that the top of the flow block slides out of the pressure regulating groove, reducing the flow space in the flow regulating pipe, thereby compressing and adjusting the flow in the flow regulating pipe to automatically achieve grouting volume adjustment.

Description

Technical Field

[0001] The invention specifically relates to the technical field of grouting devices, in particular to a directional grouting device for reinforcing mine tunnels. Background Art

[0002] When mine tunnels pass through fault fracture zones, fissure aquifers, quicksand layers or other complex structural areas, the tunnels are easily affected by dynamic pressure or concentrated stress and cracks occur, which seriously threaten the normal use of the tunnels. Therefore, in order to reinforce the tunnels, grouting equipment is required to carry out grouting operations on the tunnels.

[0003] The existing grouting equipment needs to drill holes on the tunnel wall in advance and then carry out grouting operations. However, the grouting gun on the existing grouting equipment cannot automatically adjust the grouting volume according to the hole size at the depth of the drilled hole. If the grouting volume is adjusted too low, the grouting efficiency will be affected. If the grouting volume is adjusted too high, it will not only cause impact damage to the nearby tunnel wall, but also easily cause grouting overflow, and the tunnel cracks deep in the drilled hole cannot be fully filled, affecting the grouting effect. Summary of the invention

[0004] To this end, the present invention proposes a directional grouting device for reinforcing a mine tunnel to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solution: a directional grouting device for strengthening a mine tunnel, comprising an outer sleeve and a grouting mechanism slidably arranged in the outer sleeve, wherein the left end of the outer sleeve is configured to be conical so that the outer sleeve can be adapted to be inserted into a hole drilled in a tunnel wall, and the grouting mechanism comprises

[0006] An anchor rod, the tail end of the anchor rod is connected to the grouting equipment through a grouting pipe, and the front end of the anchor rod is connected to the grouting head through a flow regulating pipe fitting;

[0007] A tension ring seat, the tension ring seat is fixedly sleeved on the side wall of the tail of the anchor rod, and tension support mechanisms are installed on both the upper and lower ends of the tension ring seat;

[0008] And a hollow ring seat, the hollow ring seat is fixedly sleeved on the outer side wall of the flow regulating pipe fitting, and the upper and lower ends of the hollow ring seat are symmetrically and rotatably installed with extrusion plates, and one end of each extrusion plate away from the hollow ring seat is hingedly connected to its corresponding tension support mechanism through a connecting rod. When the extrusion plate is squeezed and rotated backward, it can adjust the tension support mechanism to a tensioned state through the connecting rod, and tighten the tension support mechanism and the outer sleeve.

[0009] Further, as a preference, a hemispherical extrusion block is fixedly provided at one end of the extrusion plate away from the hollow ring seat.

[0010] Further, as a preference, the tension support mechanism comprises a first sliding plug, a second hinged seat, a second sliding plug, a support seat, and a first through cavity, a second through cavity and a U-shaped through cavity arranged in the tension ring seat, wherein:

[0011] A first sliding plug is slidably disposed in the first straight-through cavity, the first sliding plug is fixedly connected to one end of a first pressure rod, and the other end of the first pressure rod passes through the bottom wall of the tensioning ring seat and extends out, and then is fixedly connected to the support seat;

[0012] A second sliding plug is slidably arranged in the second through cavity, the second sliding plug is fixedly connected to one end of the second pressure rod, the other end of the second pressure rod passes through the left wall of the tension ring seat and extends out, and then is fixedly connected to the second hinge seat, and the second hinge seat is hinged to its corresponding connecting rod;

[0013] The U-shaped through cavity is connected to the first through cavity and the second through cavity, and the three of them constitute a hydraulic flow channel.

[0014] Further, as a preference, a return spring is sleeved on the side wall of a portion of the second pressure rod located between the second hinged seat and the left side wall of the tensioning ring seat.

[0015] Further, as a preference, a portion of the hydraulic flow passage between the first sliding plug and the second sliding plug is filled with hydraulic fluid.

[0016] Further, as a preference, a long groove is opened on the inner surface of the connecting rod located on the side of the hollow ring seat, and a sliding block is slidably arranged in the long groove, and a first hinge seat is fixedly installed on the top of the sliding block, and the first hinge seat is hinged to one end of the push rod, and the other end of the push rod is inserted into the pressure regulating groove on the inner wall of the flow regulating pipe fitting and is fixedly connected to the baffle block, and the baffle block is slidably arranged in the pressure regulating groove.

[0017] Further, preferably, the area of ​​the bottom of the slider is larger than the area of ​​the top thereof, and the cross-sectional shape of the slider is the same as that of the long groove.

[0018] Further, preferably, an adjusting rod is fixedly mounted on the right side wall of the tensioning ring seat.

[0019] Furthermore, as a preference, a flexible memory anti-overflow cover is fixedly provided on the outer wall of the grouting head, and the flexible memory anti-overflow cover can always be slidably connected to the inner wall of the outer sleeve through flexible deformation, and the outer ring of the flexible memory anti-overflow cover is fixedly connected to the hemispherical extrusion block.

[0020] The present invention adopts the above technology and has the following beneficial effects compared with the existing technology:

[0021] 1. In the device of the present invention, when the head of the grouting mechanism extends out from the left end of the outer sleeve, since the depth of the tunnel wall drilled hole is conical and the extrusion plate is subjected to thrust, the extrusion plate will rotate backward and drive the connecting rod to tilt and push backward. Under the hinged action of the connecting rod, the tensioning support mechanism opens outward and is in a supporting state. Moreover, the greater the backward rotation amplitude of the extrusion plate, the greater the tensioning support force of the tensioning support mechanism, so as to meet the support force required by the grouting mechanism when grouting in the deep borehole, and avoid the situation where the grouting mechanism is tilted and overflows due to the large repulsive force generated when grouting in the deep borehole.

[0022] 2. In the device of the present invention, when the extrusion plate rotates backward under extrusion, the connecting rod pushes the push rod inward, so that the top of the flow-block slides out of the pressure-regulating groove, reducing the flow space in the flow regulating pipe fitting, thereby compressing and adjusting the flow volume in the flow regulating pipe fitting to automatically realize the grouting volume adjustment. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of a directional grouting device for strengthening a mine tunnel;

[0024] Figure 2 It is a partial cross-sectional view of a directional grouting device for strengthening a mine tunnel;

[0025] Figure 3 It is a structural schematic diagram of a tension support mechanism in a directional grouting device for strengthening a mine tunnel;

[0026] Figure 4 The present invention is a schematic diagram of the connection between a first hinged seat and a sliding block in a directional grouting device for reinforcing a mine tunnel.

[0027] In the figure: 1. outer sleeve; 2. grouting pipe; 3. adjusting rod; 4. tensioning ring seat; 401. first sliding plug; 402. second straight-through cavity; 403. return spring; 404. second hinged seat; 405. second sliding plug; 406. U-shaped through cavity; 407. second pressure rod; 408. support seat; 409. first pressure rod; 410. first straight-through cavity; 5. hollow ring seat; 6. flow regulating pipe fitting; 7. grouting head; 8. connecting rod; 9. anchor rod; 10. push rod; 11. extrusion plate; 12. flow block; 13. first hinged seat; 14. slider; 15. flexible memory overflow cover. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of 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.

[0029] Example: Please see the attached Figure 1-4 The present invention provides a technical solution: a directional grouting device for strengthening a mine tunnel, which comprises an outer casing 1 and a grouting mechanism slidably arranged in the outer casing 1, wherein the left end of the outer casing 1 is set to be conical so that the outer casing 1 can be adapted to be inserted into a tunnel wall borehole, and the grouting mechanism comprises

[0030] Anchor rod 9, the tail end of anchor rod 9 is connected to grouting equipment by grouting pipe 2, and the front end of anchor rod 9 is connected to grouting head 7 by flow regulating pipe fitting 6;

[0031] The tension ring seat 4 is fixedly sleeved on the side wall of the tail of the anchor rod 9, and tension support mechanisms are installed at both the upper and lower ends of the tension ring seat 4;

[0032] and a hollow ring seat 5, which is fixedly sleeved on the outer wall of the flow regulating pipe 6, and the upper and lower ends of the hollow ring seat 5 are symmetrically and rotatably mounted with extrusion plates 11, and one end of each extrusion plate 11 away from the hollow ring seat 5 is hingedly connected to its corresponding tension support mechanism through a connecting rod 8, and when the extrusion plate 11 is squeezed and rotated backward, it can adjust the tension support mechanism to a tensioned state through the connecting rod 8, and tighten the tension support mechanism and the outer sleeve 1;

[0033] Specifically, when the head of the grouting mechanism extends into the left end of the outer sleeve 1, since the left end of the outer sleeve 1 is conical and the extrusion plate 11 is pushed, the extrusion plate 11 will rotate backward and drive the connecting rod 8 to tilt and push backward. Under the hinged action of the connecting rod 8, the tensioning support mechanism opens outward and is in a supporting state. It should be emphasized that the greater the backward rotation amplitude of the extrusion plate 11, the greater the tensioning support force of the tensioning support mechanism, so as to meet the support force required by the grouting mechanism when grouting deep in the borehole.

[0034] In this embodiment, a hemispherical extrusion block is fixedly provided at one end of the extrusion plate 11 away from the hollow ring seat 5;

[0035] It should be noted that the squeezing block is configured as a hemisphere in order to reduce damping and prevent the squeezing plate 11 from getting stuck at the left end of the inner cavity of the outer sleeve 1 when the grouting mechanism is retracted.

[0036] In this embodiment, the tension support mechanism includes a first sliding plug 401, a second hinge seat 404, a second sliding plug 405, a support seat 408, and a first through cavity 410, a second through cavity 402 and a U-shaped through cavity 406 arranged in the tension ring seat 4, wherein:

[0037] A first sliding plug 401 is slidably disposed in the first straight cavity 410, and the first sliding plug 401 is fixedly connected to one end of a first pressing rod 409, and the other end of the first pressing rod 409 passes through the bottom wall of the tensioning ring seat 4 and extends out, and then is fixedly connected to the support seat 408;

[0038] A second sliding plug 405 is slidably arranged in the second through cavity 402, and the second sliding plug 405 is fixedly connected to one end of a second pressure rod 407, and the other end of the second pressure rod 407 passes through the left side wall of the tension ring seat 4 and extends out, and then is fixedly connected to the second hinge seat 404, and the second hinge seat 404 is hinged to its corresponding connecting rod 8;

[0039] The U-shaped through cavity 406 is connected between the first through cavity 410 and the second through cavity 402 , and the three of them form a hydraulic flow channel.

[0040] In this embodiment, a return spring 403 is sleeved on the side wall of a portion of the second pressure rod 407 located between the second hinge seat 404 and the left side wall of the tension ring seat 4 .

[0041] In this embodiment, a portion of the hydraulic flow passage between the first sliding plug 401 and the second sliding plug 405 is filled with hydraulic fluid, so that the first sliding plug 401 and the second sliding plug 405 slide in the flow direction of the hydraulic fluid, and a sealed space is formed between the second sliding plug 405 and the first sliding plug 401, and the space is filled with hydraulic fluid as a medium, so that the second sliding plug 405 moves synchronously with the first sliding plug 401;

[0042] Specifically, in the absence of external force, the return spring 403 rebounds, driving the extrusion plate 11 to prop up through the connecting rod 8. At the same time, the second sliding plug 405 slides to the left. Due to the negative pressure of the hydraulic fluid, the first sliding plug 401 slides upward and retracts the support seat 408.

[0043] In this embodiment, a long groove is provided on the inner surface of the part of the connecting rod 8 located on the side of the hollow ring seat 5, and a slider 14 is slidably arranged in the long groove. A first hinge seat 13 is fixedly installed on the top of the slider 14, and the first hinge seat 13 is hinged to one end of the push rod 10. The other end of the push rod 10 penetrates into the pressure regulating groove on the inner wall of the flow regulating pipe 6 and is fixedly connected to the baffle block 12. The baffle block 12 is slidably arranged in the pressure regulating groove;

[0044] Specifically, when the extrusion plate 11 is squeezed and rotated backward, the connecting rod 8 pushes the push rod 10 inward, so that the top of the flow block 12 slides out of the pressure regulating groove, reducing the flow space in the flow regulating pipe 6, thereby compressing and adjusting the flow volume in the flow regulating pipe 6 to automatically achieve grouting volume adjustment;

[0045] When the extrusion plate 11 is restored to the propped-up state, the connecting rod 8 pulls the push rod 10 outward, so that the top of the flow-block 12 slides into the pressure-regulating groove, thereby allowing normal flow in the flow-regulating pipe 6;

[0046] It should be noted that when the push rod 10 pushes the first hinge seat 13 , the slider 14 can be adaptively slidably adjusted to cooperate with pushing the push rod 10 .

[0047] In this embodiment, the area of ​​the bottom of the slider 14 is larger than the area of ​​the top thereof, and the slider 14 has the same cross-sectional shape as the long groove to prevent the slider 14 from sliding out of the long groove.

[0048] In this embodiment, an adjusting rod 3 is fixedly mounted on the right side wall of the tension ring seat 4, and is connected to an external pushing device through the adjusting rod 3, and the adjusting rod 3 can also be pushed by hand.

[0049] In this embodiment, a flexible memory anti-overflow cover 15 is fixedly sleeved on the outer wall of the grouting head 7. The flexible memory anti-overflow cover 15 can always be slidably connected with the inner wall of the outer sleeve 1 through flexible deformation, and the outer ring of the flexible memory anti-overflow cover 15 is fixedly connected with the hemispherical extrusion block;

[0050] Specifically, the flexible memory anti-overflow cover 15 is deformed as the extrusion plate 11 rotates backward or forward.

[0051] During the specific implementation, the outer sleeve 1 is first inserted into the pre-drilled borehole and fixed, and then the grouting mechanism is pushed into the outer sleeve 1, and the extrusion plate 11 contacts the tapered hole section deep in the outer sleeve 1. As the grouting mechanism gradually moves inward, the extrusion plate 11 rotates backward and pushes the second hinge seat 404 backward through the connecting rod 8. At this time, the thrust received by the second hinge seat 404 needs to overcome the elastic force of the return spring 403, and the second hinge seat 404 can push the second slide plug 405 to slide to the right through the second pressure rod 407. Since the hydraulic flow passage between the second slide plug 405 and the first slide plug 401 is filled with hydraulic fluid, the first slide plug 401 drives the support seat 408 to move downward through the first pressure rod 409, and contacts and squeezes the inner wall of the outer sleeve 1, so that the front and rear of the grouting mechanism are supported on the inner wall of the outer sleeve 1 at the same time, so as to avoid the situation where the grouting mechanism is tilted and overflows due to the large repulsive force generated when grouting in the deep hole;

[0052] Moreover, while the extrusion plate 11 is rotated backward under the extrusion, the connecting rod 8 pushes the push rod 10 inward, so that the top of the flow-block 12 slides out of the pressure-regulating groove, reducing the flow space in the flow regulating pipe 6, thereby automatically compressing and adjusting the flow volume in the flow regulating pipe 6. When the deep borehole is filled, the flexible memory overflow cover 15 is pushed outward by the expansion of the slurry, so that the grouting mechanism gradually retreats to the straight hole section of the outer casing 1, and the extrusion plate 11 will automatically resume its propped-up state and provide support to continue the grouting operation of the straight hole section of the outer casing 1.

[0053] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A directional grouting device for reinforcing a mine tunnel, comprising an outer casing (1) and a grouting mechanism slidably arranged in the outer casing (1), wherein: The left end of the outer sleeve (1) is configured to be tapered so that the outer sleeve (1) can be inserted into a tunnel wall borehole. The grouting mechanism includes: An anchor rod (9), wherein the tail end of the anchor rod (9) is connected to the grouting equipment via a grouting pipe (2), and the front end of the anchor rod (9) is connected to the grouting head (7) via a flow regulating pipe (6); A tensioning ring seat (4), the tensioning ring seat (4) being fixedly sleeved on the side wall of the tail of the anchor rod (9), and tensioning support mechanisms being installed at both the upper and lower ends of the tensioning ring seat (4); and a hollow ring seat (5), the hollow ring seat (5) being fixedly sleeved on the outer side wall of the flow regulating pipe (6), the upper and lower ends of the hollow ring seat (5) being symmetrically and rotatably mounted with extrusion plates (11), one end of each extrusion plate (11) away from the hollow ring seat (5) being hingedly connected to its corresponding tensioning support mechanism via a connecting rod (8), when the extrusion plate (11) is rotated backward under extrusion, it can adjust the tensioning support mechanism to a tensioned state via the connecting rod (8), and tighten the tensioning support mechanism and the outer sleeve (1); A hemispherical extrusion block is fixedly provided on one end of the extrusion plate (11) away from the hollow ring seat (5); The tension support mechanism comprises a first sliding plug (401), a second hinged seat (404), a second sliding plug (405), a support seat (408), and a first straight-through cavity (410), a second straight-through cavity (402), and a U-shaped through cavity (406) arranged in the tension ring seat (4), wherein: A first sliding plug (401) is slidably arranged in the first straight-through cavity (410), the first sliding plug (401) is fixedly connected to one end of a first pressure rod (409), the other end of the first pressure rod (409) passes through the bottom wall of the tensioning ring seat (4) and extends out, and then is fixedly connected to the support seat (408); A second sliding plug (405) is slidably arranged in the second through cavity (402), the second sliding plug (405) is fixedly connected to one end of a second pressure rod (407), the other end of the second pressure rod (407) passes through the left side wall of the tension ring seat (4) and extends out, and then is fixedly connected to the second hinge seat (404), and the second hinge seat (404) is hinged to its corresponding connecting rod (8); The U-shaped through cavity (406) is connected between the first through cavity (410) and the second through cavity (402), and the three form a hydraulic flow channel.

2. A directional grouting device for mine tunnel reinforcement according to claim 1, characterized in that: A return spring (403) is sleeved on the side wall of the portion of the second pressure rod (407) located between the second hinge seat (404) and the left side wall of the tension ring seat (4).

3. A directional grouting device for mine tunnel reinforcement according to claim 2, characterized in that: A portion of the hydraulic flow passage located between the first sliding plug (401) and the second sliding plug (405) is filled with hydraulic fluid.

4. A directional grouting device for mine tunnel reinforcement according to claim 3, characterized in that: A long groove is provided on the inner surface of the connecting rod (8) located on the side of the hollow ring seat (5), and a sliding block (14) is slidably arranged in the long groove. A first hinge seat (13) is fixedly installed on the top of the sliding block (14), and the first hinge seat (13) is hinged to one end of the push rod (10). The other end of the push rod (10) is inserted into the pressure regulating groove on the inner wall of the flow regulating pipe (6) and is fixedly connected to the baffle block (12). The baffle block (12) is slidably arranged in the pressure regulating groove.

5. A directional grouting device for mine tunnel reinforcement according to claim 4, characterized in that: The area of ​​the bottom of the slider (14) is larger than the area of ​​the top thereof, and the slider (14) has the same cross-sectional shape as the long groove.

6. A directional grouting device for mine tunnel reinforcement according to claim 1, characterized in that: An adjusting rod (3) is fixedly mounted on the right side wall of the tensioning ring seat (4).

7. A directional grouting device for mine tunnel reinforcement according to claim 1, characterized in that: A flexible memory anti-overflow cover (15) is fixedly sleeved on the outer wall of the grouting head (7). The flexible memory anti-overflow cover (15) can always be slidably connected to the inner wall of the outer sleeve (1) through flexible deformation, and the outer ring of the flexible memory anti-overflow cover (15) is fixedly connected to the hemispherical extrusion block.

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