Grouting device for filling and reinforcing goaf

Abstract

The invention relates to the technical field of mine filling and reinforcing, in particular to a grouting device for filling and reinforcing a goaf, which comprises a grouting pump, a grouting pipe and plugging pieces, the grouting pipe is provided with a grout outlet, a sliding column is arranged in the grouting pipe, the plugging pieces are arranged above and below the grout outlet, and each plugging piece comprises a seat body and a plugging bag. A first annular groove is formed in the outer wall of each seat body in a concave mode, each blocking bag comprises outer bag cloth and inner bag cloth which are coaxial with the corresponding first annular groove, a first closed filling cavity is formed between the inner bag cloth and the inner wall of the corresponding first annular groove, the first filling cavities in the two seat bodies are communicated through a second pipeline, and a second annular closed filling cavity is formed between the inner bag cloth and the outer bag cloth. The second filling cavities in the two base bodies are communicated through a third pipeline, a liquid storage cavity is formed in the base body below the grout outlet, and a sliding block is connected into the liquid storage cavity in a sealed and sliding mode in the radial direction of the grouting pipe. According to the scheme, the deformation resistance of the whole plugging bag is higher, leakage of the filling slurry can be effectively prevented, and the diffusion degree of the filling slurry in rock stratum cracks above the goaf is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of mine filling and reinforcement, in particular to a grouting device for gob filling and reinforcement. BACKGROUND

[0002] After coal mining, due to the destruction of the original stress balance by mining activities, the rock strata above the gob will have different degrees of subsidence, fracture and fissure development and other harmful conditions, and the fissures in this area need to be grouted and filled to prevent surface subsidence and other disasters. In the mine grouting filling technology, the bag type hole sealing method is generally used to seal the drill hole to prevent slurry leakage and pressure relief, which causes insufficient grouting pressure, and then grouting construction is carried out. In the existing grouting filling device, the sealing bag used to seal the drill hole is filled with gas or liquid to make the bag expand tightly against the inner wall of the drill hole. However, since gas and liquid are compressible, when the sealing bag is filled with gas or liquid, the entire bag is still prone to deformation under the extrusion of the filling slurry, which makes the sealing effect of the drill hole not very good, causing slurry leakage and insufficient grouting pressure, and thus the diffusion pressure of the filling slurry in the predetermined area is reduced, the filling slurry cannot effectively diffuse in the fissure of the predetermined area, and the filling and reinforcement effect is not ideal. SUMMARY

[0003] The technical problem to be solved by the present application is to provide a grouting device for gob filling and reinforcement, which solves the problem of poor sealing effect of the existing grouting device on the drill hole, causing slurry leakage and insufficient grouting pressure, and the filling slurry cannot diffuse well in the fissure, and the filling and reinforcement effect of the rock strata above the gob is not good.

[0004] To solve the above technical problems, one basic scheme adopted by the present application is a grouting device for goaf filling and reinforcement, comprising a grouting pump, a grouting pipe and a blocking piece, a grouting outlet is arranged on the pipe wall of the grouting pipe, a sliding column is arranged in the grouting pipe, blocking pieces are arranged above and below the grouting outlet, the blocking piece comprises a seat body fixedly connected with the grouting pipe in a coaxial manner and a blocking bag arranged on the seat body, a through hole matched with the grouting pipe is arranged in the seat body, a ring groove one coaxial with the grouting pipe is concavely arranged in the middle outer wall of the seat body, the blocking bag is arranged in the ring groove one, the blocking bag comprises an outer bag cloth and an inner bag cloth both coaxial with the ring groove one, the upper ends of the outer bag cloth and the inner bag cloth are fixedly connected with the upper inner wall of the ring groove one, the lower ends of the outer bag cloth and the inner bag cloth are fixedly connected with the lower inner wall of the ring groove one, the inner bag cloth and the inner wall of the ring groove one form an annular closed filling cavity one, the filling cavity one on the seat body above the grouting outlet is communicated with an external filling device through a pipeline one, the filling cavities one on the two seat bodies are communicated through a pipeline two, the inner bag cloth and the outer bag cloth form an annular closed filling cavity two, the filling cavities two on the two seat bodies are communicated through a pipeline three, a liquid storage cavity is arranged in the seat body below the grouting outlet, the liquid storage cavity is filled with a fluid, a sliding block is sealingly and slidingly connected with the liquid storage cavity along the radial direction of the grouting pipe, the outer end of the sliding block extends into the through hole, the filling cavity two on the seat body below the grouting outlet is communicated with the liquid storage cavity. The sliding column is coaxially arranged with the grouting pipe, the sliding column is elastically connected with the seat body below the grouting outlet, the upper end of the sliding column is sealingly and slidingly connected with the inner wall of the grouting pipe, the lower end of the sliding column extends out of the grouting pipe, the lower end of the sliding column is provided with an inclined surface one, when high-pressure slurry is introduced into the grouting pipe, the sliding column is forced to slide and push the sliding block to slide to press the fluid in the liquid storage cavity into the filling cavity two.

[0005] In the above scheme, first, a grouting drill hole is drilled downward, the grouting pipe provided with the blocking piece is lowered to the grouting outlet to reach a predetermined depth position in the drill hole, the filling cavity one is filled with coagulable blocking slurry through the filling device and the pipeline one to make the inner bag cloth expand tightly against the outer bag cloth and make the outer bag cloth tightly against the inner wall of the grouting drill hole, after a certain period of time, the blocking slurry coagulates in the filling cavity one to reduce the volume, so that the pressing force between the inner bag cloth and the outer bag cloth is reduced, and the pressing force between the outer bag cloth and the inner wall of the grouting drill hole is also reduced, when the filling slurry is pressurized and injected into the grouting pipe through the grouting pump, the sliding column slides downward under the extrusion of the filling slurry and extrudes the sliding block through the inclined surface one to slide away from the axis of the grouting pipe, the sliding of the sliding block extrudes the fluid in the liquid storage cavity into the filling cavity two on the two seat bodies to make the outer bag cloth expand to increase the pressing force against the inner wall of the grouting drill hole, which effectively prevents the filling slurry in the grouting drill hole from leaking between the outer bag cloth and the inner wall of the grouting drill hole.

[0006] In the above scheme, when grouting filling is needed, the automatic compensation of the pressure reduction caused by the solidification of the plugging slurry forces the outer bladder cloth to expand and extrude the inner wall of the grouting borehole again, effectively preventing the leakage of the filling slurry. Compared with plugging with a completely gas-filled or liquid-filled bladder, in the above scheme, most of the space in the plugging bladder after expansion and solidification is filled with non-deformable solid material, so the anti-deformation ability of the entire plugging bladder is stronger, the plugging ability is stronger, the leakage of the filling slurry can be effectively prevented, the diffusion degree of the filling slurry in the rock stratum above the goaf is improved, and the filling and reinforcing effect is improved.

[0007] Further, the grouting pipe comprises a lower pipe at the lowermost end and an upper pipe detachably connected to the lower pipe above the lower pipe, and the grouting outlet, the sliding column and the plugging member are all arranged on the lower pipe.

[0008] Further, the upper pipe is threadedly connected to the lower pipe.

[0009] Further, the lower pipe is provided with a closing plate for closing the grouting outlet, a baffle for blocking the closing plate and a sliding seat for limiting the baffle, the upper end of the closing plate is hingedly connected to the lower pipe, the baffle is an L-shaped plate comprising a horizontal part and a vertical part, a vertical sliding groove is formed in the pipe wall of the lower pipe, the horizontal part of the baffle extends into the inner cavity of the lower pipe through the vertical sliding groove and is fixedly connected to the sliding column, the sliding seat is detachably connected to the lower pipe, the sliding seat is provided with a sliding hole matched with the vertical part of the baffle, the upper end of the vertical part of the baffle extends out of the upper part of the sliding seat through the sliding hole and blocks the lower end of the closing plate, a spring one is vertically arranged below the baffle, the upper end of the spring one is fixedly connected to the baffle, and the lower end of the spring one is fixedly connected to the seat body.

[0010] In the above scheme, under the elastic force of the spring one, the baffle is in a high position, the upper end of the baffle blocks the closing plate to prevent the closing plate from opening the grouting outlet, when the slurry is injected into the grouting pipe, the high-pressure slurry in the grouting pipe first forces the sliding column to move downward, and then the sliding column slides downward through the sliding block to press the fluid in the liquid storage cavity into the filling cavity two to make the outer bladder cloth expand and press the inner wall of the grouting borehole, after that, the baffle moves downward to the lower part of the closing plate and cannot block the closing plate, the closing plate opens under the pressure of the filling slurry, and then the filling slurry in the grouting pipe enters the grouting borehole through the grouting outlet, which realizes the function that the filling slurry can enter the grouting borehole only after the outer bladder cloth expands again, and avoids the leakage of the slurry caused by the filling slurry entering the grouting borehole when the outer bladder cloth does not fully expand again after the inner bladder cloth shrinks.

[0011] Further, the sliding column comprises a first column segment, a second column segment and a third column segment arranged from top to bottom, the first column segment is in sealing sliding connection with the inner wall of the lower pipe, the second column segment and the third column segment are located in the through hole below the lower pipe, the outer diameter of the third column segment is larger than that of the second column segment, the inclined surface one is arranged on the third column segment, when the sliding column slides downward and the third column segment passes the sliding block, the upper end of the baffle is separated from the closing plate.

[0012] Under the pressure of the filling slurry, the sliding column slides downward to push the sliding block to slide and press the outer bag cloth against the inner wall of the grouting borehole, the sliding column slides downward to the third column segment to pass the sliding block so that the sliding block is located above the third column segment and abuts against the outer wall of the second column segment, and the sliding column cannot slide upward, thereby preventing the sliding column from sliding upward due to the decrease of the pressure of the filling slurry caused by the opening of the closing plate, and preventing the fluid from flowing back to the liquid storage cavity, and the pressure is stabilized to prevent the decrease of the pressing force between the outer bag cloth and the inner wall of the grouting borehole after the closing plate is opened.

[0013] Further, the spring two is arranged in the radial direction of the grouting pipe in the liquid storage cavity, one end of the spring two is fixedly connected with the inner wall of the liquid storage cavity, and the other end of the spring two is fixedly connected with the sliding block. The spring two prevents the sliding block from sliding out of the liquid storage cavity.

[0014] Further, the seat body below the grout outlet is symmetrically provided with the liquid storage cavities, and the third column segment is symmetrically provided with the inclined surface one corresponding to the sliding block in the corresponding liquid storage cavity.

[0015] Further, the end of the sliding block extending into the through hole is provided with the inclined surface two matched with the inclined surface one.

[0016] Further, the outer bag cloth and the inner bag cloth are both flexible waterproof cloth.

[0017] Further, the fluid is water.

[0018] Compared with the prior art, the present application has at least the following beneficial effects: Compared with the complete use of gas or liquid filled bag for plugging, in the present application, the vast majority of space in the expanded and solidified plugging bag is filled with non-deformable solid material, so that the anti-deformation ability of the whole plugging bag is stronger, the plugging ability is stronger, the leakage of the filling slurry can be effectively prevented, the diffusion degree of the filling slurry in the rock stratum above the goaf is improved, and the filling and reinforcing effect is improved. When grouting filling is needed, the pressure decrease caused by the solidification of the plugging slurry can be automatically compensated, the outer bag cloth is forced to expand again to increase the pressing force of the outer bag cloth against the inner wall of the grouting borehole, and the leakage of the filling slurry can be effectively prevented. In this scheme, the outer bladder needs to expand again under the pressure of the filling slurry to increase the clamping force on the inner wall of the grouting hole before the filling slurry can enter the grouting hole. This avoids the leakage of slurry caused by the filling slurry entering the grouting hole before the outer bladder has fully expanded again after the inner bladder has shrunk. In this scheme, the sliding column causes the outer bladder to expand again, increasing the clamping force on the inner wall of the grouting borehole. After this, the sliding column can no longer slide upwards. This prevents the sliding column from sliding upwards due to the reduced pressure of the filling grout on the sliding column after the sealing plate is opened, which would cause the fluid to flow back into the storage cavity. This plays a role in stabilizing and maintaining pressure to prevent the clamping force between the outer bladder and the inner wall of the grouting borehole from decreasing after the sealing plate is opened. Attached Figure Description

[0019] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments of the application and are used to explain the application, but do not constitute an undue limitation of the application. In the drawings: Figure 1 This is a schematic diagram of the grouting device for filling and reinforcing goaf areas according to the present invention.

[0020] Figure 2 for Figure 1 The lower part of the image is a detailed view.

[0021] Figure 3 for Figure 2 The lower part of the image is a detailed view.

[0022] Figure 4 for Figure 2 Sectional view of AA.

[0023] Figure 5 for Figure 3 BB section view.

[0024] Figure 6 This is a schematic diagram of the structure after the grouting pipe is located in the grouting borehole and the sealing grout is filled into the filling cavity.

[0025] Figure 7 This is a schematic diagram of the structure after the sealing grout in the filling cavity has solidified and the filling grout is injected into the grouting pipe.

[0026] Figure 8 for Figure 7 The lower part of the image is a detailed view.

[0027] The meanings of the labels in the attached diagram are as follows: Grouting pipe-10; Lower pipe-101; Grout outlet-1011; Vertical chute-1012; Upper pipe-102; Sealing component-20; base-201; through hole-2011; annular groove one-2012; liquid storage chamber-2013; Occlusion bag-202; Inner bag fabric-2021; Outer bag fabric-2022; Filling cavity one-2023; Filling cavity two-2024; Slider-203; Inclined Plane 2-2031; Spring 2-204; Pipeline 1-31; Pipeline 2-32; Pipeline 3-33; Sliding column -40; First column segment -401; Second column segment -402; Third column segment -403; Inclined surface one -4031; Enclosed plate-51; baffle-52; slide-53; sliding hole-531; spring-1-54; Grouting borehole -60; Sealing grout - 70. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0030] This embodiment provides a grouting device for reinforcing and filling goaf areas, such as... Figures 1-8 As shown, the system includes a grouting pump (not shown), a grouting pipe 10, and a sealing element 20. The grouting pump is a conventional grouting pump and is located on the ground. The grouting pipe 10 includes a lower pipe 101 located at the lower end and an upper pipe 102 located above the lower pipe 101 and detachably connected to it. The lower end of the upper pipe 102 has an internal thread on its inner wall, and the upper end of the lower pipe 101 has an external thread that mates with the lower end of the upper pipe 102. The upper pipe 102 is threadedly connected to the lower pipe 101. The sealing element 20 is located on the lower pipe 101. After the filling grout has solidified, the upper pipe 102 can be rotated and removed, leaving the lower pipe 101 and the sealing element 20 inside the borehole.

[0031] The lower pipe 101 is provided with a slurry outlet 1011 for connecting the inner and outer spaces of the lower pipe 101, and a sliding column 40 is arranged in the lower pipe 101 below the slurry outlet 1011, wherein the sliding column 40 is arranged in sealing sliding connection with the inner wall of the lower pipe 101, and the sliding column 40 comprises a first column segment 401, a second column segment 402 and a third column segment 403 arranged in sequence from top to bottom, wherein the first column segment 401, the second column segment 402 and the third column segment 403 are coaxially arranged, the first column segment 401 is in sealing sliding connection with the lower inner wall of the lower pipe 101, and the second column segment 402 and the third column segment 403 are arranged below the lower pipe 101, as shown in Figure 3 、 Figure 5 The outer diameter of the third column segment 403 is greater than that of the second column segment 402, and the lower end of the third column segment 403 is symmetrically provided with an inclined surface 4031 which is inclined downward from the cylindrical surface of the third column segment 403 towards the axis direction close to the sliding column 40, as shown in Figure 2 、 Figure 4 The slurry outlet 1011 is provided with a closing plate 51 for closing the slurry outlet 1011, the upper end of the closing plate 51 is hingedly connected with the grouting pipe 10, the lower pipe 101 is provided with a baffle plate 52 and a sliding seat 53 for blocking the opening of the closing plate 51, a vertical sliding groove 1012 for connecting the inner and outer spaces of the lower pipe 101 is vertically arranged on the pipe wall of the grouting pipe 10 below the slurry outlet 1011, the baffle plate 52 is an L-shaped plate comprising a horizontal part and a vertical part, the horizontal part of the baffle plate 52 extends into the inner cavity of the lower pipe 101 through the vertical sliding groove 1012 and is fixedly connected with the sliding column 40, specifically, a plug hole matched with the horizontal part of the baffle plate 52 can be arranged on the sliding column 40 in the radial direction of the sliding column 40, and then the horizontal part of the baffle plate 52 is inserted on the sliding column 40 through the vertical sliding groove 1012, the sliding seat 53 is arranged close to the lower edge of the slurry outlet 1011, the sliding seat 53 is connected with the lower pipe 101 through screws, a sliding hole 531 matched with the vertical part of the baffle plate 52 is vertically arranged on the sliding seat 53, the upper end of the vertical part of the baffle plate 52 extends out of the upper part of the sliding seat 53 through the sliding hole 531 and blocks the lower end of the closing plate 51, a spring 54 is vertically arranged below the baffle plate 52, the upper end of the spring 54 is fixedly connected with the horizontal part of the baffle plate 52, and the lower end of the spring 54 is fixedly connected with the upper surface of the seat body 201 below the slurry outlet 1011.

[0032] The upper and lower sides of the pulp outlet 1011 are provided with a blocking member 20, the blocking member 20 comprises a seat body 201 coaxially arranged with the grouting pipe 10 and a blocking bag 202 arranged on the seat body 201, the seat body 201 is a rotary body, a through hole 2011 cooperating with the grouting pipe 10 is arranged in the seat body 201 along the axis of the seat body 201, the seat body 201 above the pulp outlet 1011 is sleeved on the outside of the lower pipe 101 near the upper end surface of the lower pipe 101 and is sealingly and fixedly connected with the lower pipe 101, the seat body 201 below the pulp outlet 1011 is sleeved on the lower end of the lower pipe 101, the lower end of the lower pipe 101 is inserted into the upper inner cavity of the through hole 2011 in the seat body 201 and is sealingly and fixedly connected with the seat body 201, the lower part of the seat body 201 is located below the lower pipe 101, the second column segment 402 and the third column segment 403 are located in the lower inner cavity of the through hole 2011 of the seat body 201, the middle outer wall of the seat body 201 above and below the pulp outlet 1011 is concavely provided with a ring groove I 2012 coaxial with the grouting pipe 10, and the blocking bag 202 is arranged in the ring groove I 2012.

[0033] The sealing bag 202 comprises an annular outer bag 2022 and an inner bag 2021 coaxially arranged in the annular groove 2012, the outer bag 2022 and the inner bag 2021 are flexible waterproof cloth, the upper ends of the outer bag 2022 and the inner bag 2021 are fixedly connected with the upper inner wall of the annular groove 2012, the lower ends of the outer bag 2022 and the inner bag 2021 are fixedly connected with the lower inner wall of the annular groove 2012, the inner bag 2021 and the inner wall of the annular groove 2012 form an annular closed filling cavity 2023, the filling cavity 2023 on the seat 201 above the slurry outlet 1011 is communicated with an external filling device through a pipeline 31, a one-way valve is arranged on the pipeline 31 to prevent the fluid in the filling cavity 2023 from flowing back, the filling device is arranged on the ground, and the filling device is used for adding a sealable sealing slurry 70 such as cement slurry into the filling cavity 2023, the filling cavity 2023 on the seat 201 above and below the slurry outlet 1011 is sealed and communicated through a pipeline 32. The inner bag 2021 and the outer bag 2022 form an annular closed filling cavity 2024, and the filling cavities 2024 on the two seats 201 are communicated through a pipeline 33. A liquid storage cavity 2013 is symmetrically arranged in the seat 201 below the slurry outlet 1011 and corresponds to the inclined surface 4031 on the third column segment 403, the filling cavity 2024 on the seat 201 is communicated with the liquid storage cavity 2013, the liquid storage cavity 2013 is filled with water, a sliding block 203 is sealingly and slidably connected in the liquid storage cavity 2013 along the radial direction of the lower pipe 101, the outer end of the sliding block 203 extends into the through hole 2011, the outer end of the sliding block 203 is provided with an inclined surface 2031 which can abut against the inclined surface 4031, a spring 204 is arranged in the liquid storage cavity 2013 along the radial direction of the lower pipe 101, one end of the spring 204 is fixedly connected with the inner wall of the liquid storage cavity 2013, and the other end of the spring 204 is fixedly connected with the sliding block 203, when high-pressure filling slurry is introduced into the injection pipe 10, the sliding column 40 is forced to slide downward, when the sliding column 40 slides downward, the inclined surface 4031 on the third column segment 403 cooperates with the inclined surface 2031 on each sliding block 203 to push the sliding block 203 to slide away from the axis of the lower pipe 101, so that the water in the corresponding liquid storage cavity 2013 is pressed into the filling cavity 2024 on the two seats 201 to make the outer bag 2022 expand and tightly abut against the inner wall of the injection drill hole 60, when the sliding column 40 slides downward, the baffle 52 is driven to move downward, and the sealing bag 202 is gradually filled with the sealing slurry 70, and the sealing bag 202 is gradually inflated and tightly abuts against the inner wall of the injection drill hole 60, so that the sealing bag 202 is tightly sealed with the inner wall of the injection drill hole 60, and the sealing bag 202 is tightly sealed with the inner wall of the injection drill hole 60. Figure 7As shown, when the slide column 40 slides downward so that the third column segment 403 passes downward beyond the sliding block 203, the upper end of the baffle plate 52 passes downward beyond the lower end of the closing plate 51, and the closing plate 51, which is not blocked by the baffle plate 52, can be rotated to open the slurry outlet 1011. After the sliding block 203 slides slightly toward the axis of the lower pipe 101 under the elastic force of the spring 204 and abuts against the outer wall of the second column segment 402, the slide column 40 cannot slide upward under the blockage of the sliding block 203.

[0034] In use, the present application first drills the grouting hole 60 downward, and then lowers the grouting pipe 10, on which the plugging member 20 is installed, to the grouting outlet to a predetermined depth position in the hole. At this time, under the elastic force of the spring 1 54, the baffle plate 52 is in the high position, the upper end of the baffle plate 52 blocks the closing plate 51 to prevent the closing plate 51 from opening the slurry outlet 1011. Through the filling equipment, the high-pressure coagulable plugging slurry 70 is filled into the filling cavity 1 023 on the two bodies 201 through the pipeline 1 31, so that the inner capsule cloth 2021 is inflated to tightly adhere to the outer capsule cloth 2022, and the outer capsule cloth 2022 is tightly adhered to the inner wall of the grouting hole 60. After a certain period of time, the plugging slurry 70 coagulates in the filling cavity 1 023, and the volume reduction causes the pressure between the inner capsule cloth 2021 and the outer capsule cloth 2022 to decrease, and further causes the pressure between the outer capsule cloth 2022 and the inner wall of the grouting hole 60 to decrease. When the filling slurry is injected into the grouting pipe 10, since the slurry outlet 1011 is in the closed state, the high-pressure filling slurry in the grouting pipe 10 first forces the slide column 40 to move downward, and the slide column 40 slides downward through the sliding block 203 to press the fluid in the liquid storage cavity 2013 into the filling cavity 2 024 on each body 201 to inflate each outer capsule cloth 2022 to tightly press the inner wall of the grouting hole 60. When the slide column 40 slides downward so that the third column segment 403 passes downward beyond the sliding block 203, the upper end of the baffle plate 52 passes downward beyond the lower end of the closing plate 51 and cannot block the closing plate 51. Under the pressure of the filling slurry, the closing plate 51 is opened, and the filling slurry in the grouting pipe 10 enters the grouting hole 60 through the slurry outlet 1011. Since the third column segment 403 cannot slide upward under the blockage of the sliding block 203, the sliding block 203 also cannot slide toward the axis of the lower pipe 101, and thus the filling cavity 2 024 is always in the high-pressure pressure-maintaining state of making the outer capsule cloth 2022 close to the inner wall of the grouting hole 60, effectively preventing the filling slurry in the grouting hole 60 from leaking between the outer capsule cloth 2022 and the inner wall of the grouting hole 60.

[0035] The above is only an embodiment of the present application, and the common knowledge of the specific structure and characteristics in the scheme is not described in detail. It should be pointed out that for those skilled in the art, without departing from the structure of the present application, a number of modifications and improvements can be made, which should also be considered as the protection scope of the present application, which will not affect the effect and practicality of the patent. The protection scope claimed in this application should be subject to the content of its claims, and the specific implementation mode and the like recorded in the specification can be used to explain the content of the claims.

Claims

1. A grouting device for reinforcing and filling goaf areas, comprising a grouting pump, a grouting pipe, and sealing components, wherein a grout outlet is provided on the pipe wall of the grouting pipe, and sealing components are provided above and below the grout outlet, characterized in that: A sliding column is provided inside the grouting pipe. The sealing component includes a seat body coaxially and fixedly connected to the grouting pipe and a sealing bag disposed on the seat body. The seat body has a through hole that mates with the grouting pipe. The outer wall of the middle part of the seat body is recessed with an annular groove coaxial with the grouting pipe. The sealing bag is disposed in the annular groove and includes an outer lining cloth and an inner lining cloth, both coaxial with the annular groove. The upper ends of the outer lining cloth and the inner lining cloth are fixedly connected to the upper inner wall of the annular groove, and the lower ends of the outer lining cloth and the inner lining cloth are fixedly connected to the lower inner wall of the annular groove. The inner lining cloth is fixedly connected to the annular groove. A closed annular filling cavity is formed between the inner walls of the trough 1. The filling cavity 1 on the seat above the slurry outlet is connected to the external filling equipment through pipe 1. The filling cavities 1 on the two seats are connected through pipe 2. A closed annular filling cavity 2 is formed between the inner and outer bladders. The filling cavities 2 on the two seats are connected through pipe 3. A liquid storage cavity is provided in the seat below the slurry outlet. The liquid storage cavity is filled with fluid. A slider is sealed and slidably connected to the grouting pipe in the liquid storage cavity. The outer end of the slider extends into the through hole. The filling cavity 2 on the seat below the slurry outlet is connected to the liquid storage cavity. The sliding column is coaxially arranged with the grouting pipe, and the sliding column is elastically connected to the seat below the grout outlet. The upper end of the sliding column is slidably and sealed to the inner wall of the grouting pipe, and the lower end of the sliding column extends downward outside the grouting pipe. The lower end of the sliding column is provided with an inclined surface. When high-pressure grout is introduced into the grouting pipe, the sliding column is forced to slide and push the slider to slide, pressing the fluid in the storage chamber into the filling chamber.

2. The grouting device for filling and reinforcing goaf areas according to claim 1, characterized in that: The grouting pipe includes a lower pipe at the lowest end and an upper pipe located above the lower pipe and detachably connected to it. The grout outlet, the sliding column, and the sealing element are all disposed on the lower pipe.

3. The grouting device for filling and reinforcing goaf areas according to claim 2, characterized in that: The upper tube is threadedly connected to the lower tube.

4. The grouting device for filling and reinforcing goaf areas according to claim 2, characterized in that: The lower tube is provided with a sealing plate for sealing the slurry outlet, a baffle for blocking the sealing plate, and a slide. The upper end of the sealing plate is hinged to the lower tube. The baffle is an L-shaped plate including a horizontal part and a vertical part. A vertical sliding groove is opened on the wall of the lower tube. The horizontal part of the baffle extends into the inner cavity of the lower tube through the vertical sliding groove and is fixedly connected to the sliding column. The slide is detachably connected to the lower tube. The slide is provided with a sliding hole that mates with the vertical part of the baffle. The upper end of the vertical part of the baffle extends above the slide through the sliding hole and blocks the lower end of the sealing plate. A spring is vertically arranged below the baffle. The upper end of the spring is fixedly connected to the baffle, and the lower end of the spring is fixedly connected to the seat.

5. The grouting device for filling and reinforcing goaf areas according to claim 4, characterized in that: The sliding column includes a first column segment, a second column segment, and a third column segment arranged sequentially from top to bottom. The first column segment is slidably and sealingly connected to the inner wall of the lower tube. The second column segment and the third column segment are both located in the through hole below the lower tube. The outer diameter of the third column segment is larger than the outer diameter of the second column segment. An inclined surface is provided on the third column segment. When the sliding column slides downward and the third column segment passes the slider, the upper end of the baffle disengages from the closing plate.

6. The grouting device for filling and reinforcing goaf areas according to claim 2, characterized in that: A second spring is installed radially along the grouting pipe inside the liquid storage cavity. One end of the second spring is fixedly connected to the inner wall of the liquid storage cavity, and the other end of the second spring is fixedly connected to the slider.

7. The grouting device for filling and reinforcing goaf areas according to claim 5, characterized in that: The liquid storage chambers are symmetrically distributed in the seat below the slurry outlet, and the third column section is symmetrically provided with inclined surfaces corresponding to the sliders in the corresponding liquid storage chambers.

8. The grouting device for filling and reinforcing goaf areas according to claim 1, characterized in that: One end of the slider that extends into the through hole is provided with a second inclined surface that cooperates with the first inclined surface.

9. The grouting device for filling and reinforcing goaf areas according to claim 1, characterized in that: Both the outer and inner lining fabrics are flexible waterproof fabrics.

10. The grouting device for filling and reinforcing goaf areas according to claim 1, characterized in that: The fluid is water.

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