Multifunctional high-pressure grouting equipment for coal mine strata

Abstract

The present application relates to the technical field of rock stratum grouting, and particularly relates to a multifunctional high-pressure grouting equipment for coal mine rock stratum, which comprises a one-way valve, a pipeline one and a sound wave sensor; a plurality of one-way valves are arranged on the lower part of a connecting block; a plurality of flow channels are arranged on the upper part of the connecting block and are communicated with the corresponding one-way valves; the lower side of the connecting block is connected with the pipeline one; a plurality of passages one are arranged on the inner side of the pipeline one and are communicated with the corresponding one-way valves; the sound wave sensor is used for detecting the fissure at the rock stratum part corresponding to the air bag; when there is a fissure at the rock stratum part corresponding to the air bag, the jointing grout is injected into the fissure of the rock stratum part through the connecting block, and the jointing grout is smeared into the fissure of the rock stratum part through the connecting block, so that the jointing position of the rock stratum part deep hole and the fissure is smoothed; then the air bag is inflated to fix the parts on the rock stratum part deep hole, so that the air bag is prevented from being broken due to the extrusion to the sharp jointing position of the deep hole and the fissure, and the grouting filling effect is prevented from being affected.

Description

A multi-functional high-pressure grouting device for coal mine rock strata Technical Field

[0001] This invention relates to the technical field of rock grouting. More specifically, this invention relates to a multifunctional high-pressure grouting device for coal mine rock strata. Background Technology

[0002] During coal mining, dense cracks exist in the rock strata, leading to a decrease in the structural stability of the rock and making it prone to collapse during mining. To avoid this, existing technologies reinforce the rock cracks before mining by injecting filling materials into the cracks.

[0003] During grouting, deep holes are drilled at the locations of the rock strata that need reinforcement. These deep holes are connected to the cracks in the rock strata. Then, airbags are used to seal the ends of the deep holes, and grout is injected into the deep holes so that it flows into the cracks, thereby enhancing the overall stability of the rock strata and reducing the risk of collapse.

[0004] Because the connection between the deep hole and the crack is relatively sharp and has sharp corners, when the airbag expands and squeezes these parts, they are easily scratched or punctured, leading to sealing failure and affecting the grouting filling effect.

[0005] In summary, this application proposes a multi-functional high-pressure grouting device for coal mine rock strata, which improves the aforementioned technical problems. Summary of the Invention

[0006] To overcome the drawback that the airbag component is easily scratched or punctured when expanding and compressing the connection between the deep hole and the crack, resulting in sealing failure and affecting the grouting filling effect, this invention provides a multi-functional high-pressure grouting device for coal mine rock strata.

[0007] The technical solution of this invention is as follows:

[0008] A multifunctional high-pressure grouting device for coal mine rock strata includes a connecting block and an air bladder; the air bladder is fixedly connected to the connecting block; it also includes a one-way valve, a first pipe, and an acoustic sensor; several one-way valves are installed at the lower part of the connecting block; several flow channels are opened on the connecting block, and the flow channels are connected to the corresponding one-way valves; the first pipe is connected to the lower side of the connecting block; several channels are opened inside the first pipe, and the channels are connected to the corresponding one-way valves; a through hole is opened on the connecting block; a cavity is formed between the connecting block and the air bladder, and the through hole allows the cavity to communicate with the corresponding flow channel on the connecting block; a second through hole is opened on the connecting block; a second cavity is opened on the connecting block, and the through hole allows the cavity to communicate with the corresponding flow channel on the connecting block; an opening is opened on the connecting block, and the opening communicates with the second cavity; an annular part is provided on the connecting block; a beveled part is provided on the connecting block; a flange is provided on the connecting block, and the beveled part is located between the annular part and the flange.

[0009] More preferably, in the above-mentioned multi-functional high-pressure grouting equipment for coal mine rock strata, the outer surface of the connecting block is set as a smooth surface.

[0010] More preferably, the above-mentioned multi-functional high-pressure grouting equipment for coal mine rock strata also includes an auxiliary component, which includes a connector and a second pipe; the connector is screwed onto the first pipe; the second pipe is fixed to the connector, and the second pipe is screwed onto the connector block; the inner side of the second pipe is provided with several channels, which are connected to the corresponding channels, and the channels are connected to the corresponding one-way valves.

[0011] More preferably, the above-mentioned multi-functional high-pressure grouting equipment for coal mine rock strata also includes a fixing component, which includes a round pipe, a rubber block and a ring; the round pipe is slidably connected to the outer side of the second pipe; the rubber block is fixed to the round pipe; the ring is connected to the round pipe; an elastic part is provided on the round pipe; the outer diameter of the elastic part increases from bottom to top; the inner diameter of the ring decreases from bottom to top; the elastic part is threadedly connected to the ring.

[0012] More preferably, in the above-mentioned multi-functional high-pressure grouting equipment for coal mine rock strata, the rubber block is smaller at the top and larger at the bottom.

[0013] More preferably, in the above-mentioned multi-functional high-pressure grouting equipment for coal mine rock strata, the outer surface of the ring is provided with anti-slip grooves.

[0014] More preferably, in the above-mentioned multi-functional high-pressure grouting equipment for coal mine rock strata, the inclined surface of the connecting block is provided with several finned sections.

[0015] More preferably, in the above-mentioned multi-functional high-pressure grouting equipment for coal mine rock strata, both the inclined section and the fin section are made into rough surfaces.

[0016] More preferably, in the above-mentioned multi-functional high-pressure grouting equipment for coal mine rock strata, the airbag is made of puncture-resistant material.

[0017] More preferably, in the above-mentioned multi-functional high-pressure grouting equipment for coal mine rock strata, one end of the pipeline is chamfered.

[0018] Beneficial effects:

[0019] 1. Cracks are detected at the rock stratum corresponding to the airbag using an acoustic sensor. When cracks are found at the rock stratum corresponding to the airbag, the joint filling grout is injected into the cracks of the rock stratum through the connecting block. The joint filling grout is then spread into the cracks of the rock stratum through the connecting block to smooth the connection between the deep hole and the crack. After that, the airbag is inflated to fix the parts on it in the deep hole of the rock stratum. This prevents the airbag from being squeezed at the sharp connection between the deep hole and the crack and breaking, thus avoiding affecting the grouting filling effect.

[0020] Second, with the extension of pipe two, the connector, which serves as the port, is located outside the deep hole of the rock stratum. After the joint filling grout has cured, pipe one can be easily screwed into the connector for grouting and reinforcement, thus avoiding the connection difficulties caused by the connector being located deep in the rock stratum.

[0021] Third, by using a combination of round tubes, rubber blocks, and rings, the connecting block and its parts are fixed to the deep hole of the rock layer, reducing the risk of detachment. At the same time, the finned part improves the adhesion stability of the joint sealant to the connecting block and its parts. Together with the fixing components, the connecting block and its parts are fixed, further reducing the risk of detachment and ensuring strong stability. Attached Figure Description

[0022] Figure 1 shows a schematic diagram of the structure of the multifunctional high-pressure grouting equipment for coal mine rock strata according to the present invention;

[0023] Figure 2 shows a cross-sectional view of the multifunctional high-pressure grouting equipment for coal mine rock strata according to the present invention;

[0024] Figure 3 shows a schematic diagram of the connecting block of the present invention;

[0025] Figure 4 shows an exploded view of the connecting block and the second pipe of the present invention;

[0026] Figure 5 shows a schematic diagram of the fixing component of the present invention;

[0027] Figure 6 shows an exploded view of pipe one, connector and pipe two of the present invention;

[0028] Figure 7 shows an exploded view of the fixing component of the present invention.

[0029] The components in the diagram are labeled as follows: 1-Connecting block, 2-One-way valve, 3-Airbag, 4-Pipe 1, 5-Acoustic sensor, 6-Rock layer component, 201-Connector, 202-Pipe 2, 203-Circular pipe, 204-Rubber block, 205-Circular ring, 11-Flow channel, 12-Through hole 1, 13-Cavity 1, 14-Through hole 2, 15-Cavity 2, 16-Opening, 17-Annular part, 18-Sloping part, 19-Flange part, 110-Fin part, 91-Channel 1, 92-Channel 2, 93-Elastic part. Detailed Implementation

[0030] The present invention will be further described below with reference to the embodiments shown in the accompanying drawings.

[0031] Example 1

[0032] A multifunctional high-pressure grouting device for coal mine rock strata, as shown in Figures 1-6, includes a connecting block 1 and an air bladder 3; the air bladder 3 is fixedly connected to the connecting block 1; it also includes a one-way valve 2, a pipe 4, and an acoustic sensor 5; three one-way valves 2 are installed at the lower part of the connecting block 1; three flow channels 11 are opened on the connecting block 1, and the flow channels 11 are connected to the corresponding one-way valves 2; a pipe 4 is connected to the lower side of the connecting block 1; three channels 91 are opened inside the pipe 4, and the channels 91 are connected to the corresponding one-way valves 2; a through hole 12 is opened on the connecting block 1; the connecting block 1 and... A cavity 13 is formed between the airbags 3, and a through hole 12 connects the cavity 13 to the corresponding flow channel 11 on the connecting block 1; a through hole 14 is provided on the connecting block 1; a cavity 15 is provided on the connecting block 1, and the through hole 14 connects the cavity 15 to the corresponding flow channel 11 on the connecting block 1; an opening 16 is provided on the connecting block 1, and the opening 16 connects to the cavity 15; an annular part 17 is provided on the connecting block 1; a beveled part 18 is provided on the connecting block 1; a flange 19 is provided on the connecting block 1, and the beveled part 18 is located between the annular part 17 and the flange 19.

[0033] The outer surface of the connecting block 1 is made smooth to reduce friction, making it easier for the device to move through the holes in the rock stratum 6.

[0034] It also includes auxiliary components, including connector 201 and pipe 202; connector 201 is screwed onto pipe 4, and connector 201 is made of lightweight alloy material; pipe 202 is fixed to connector 201, and pipe 202 is screwed onto connector block 1; three channels 92 are provided inside pipe 202, channel 92 is connected to the corresponding channel 91, and channel 92 is connected to the corresponding one-way valve 2.

[0035] An external grouting machine is installed at the lower end of pipe 4. First, a person manually holds pipe 4 and inserts the connecting block 1 and its parts into the predetermined position of the deep hole of the rock stratum 6. After inserting the connecting block 1 and its parts into the predetermined position of the deep hole of the rock stratum 6, the person can then move pipe 4 upward. The acoustic sensor 5 detects the crack condition at the rock stratum 6 corresponding to the airbag 3. If a crack is detected, the person moves the connecting block 1 and its parts downward through pipe 4 so that the connecting block 1 is aligned with the crack. Then, the external grouting machine delivers the joint filling grout (polyurethane polymer filler) to one of the channels 91 of pipe 4. The joint filling grout flows from channel 91 to the corresponding one-way valve 2, and then flows through the one-way valve 2 into the through hole 1. In the connected flow channel 11, the joint filler grout flows through the through hole 14 into the cavity 15. After filling the cavity 15, the joint filler grout is sprayed out in a ring shape from the opening 16. When the connecting block 1 is inserted into the deep hole of the rock component 6, the annular part 17 and the flange part 19 are in close contact with the inside of the deep hole of the rock component 6, so that the connecting block 1 and the rock component 6 form a relatively sealed space. At this time, the joint filler grout flows into the sealed space from the opening 16, and then fills the cracks of the rock component 6 under pressure. When the external grouting machine detects that the joint filler grout pressure value inside the pipe 4 reaches the threshold, it indicates that the cracks of the rock component 6 have been filled with joint filler grout. The external grouting machine stops supplying joint filler grout to the pipe 4. Then, the pipe 4 is manually driven. 4. Slowly move upwards, causing the inclined surface 18 to smooth and squeeze the grout into the crack of the rock stratum 6, making the junction between the inner wall of the deep hole of the rock stratum 6 and the crack smooth. The connecting block 1 will drive the airbag 3 to move upwards together, so that the airbag 3 aligns with the smooth inner wall of the deep hole of the rock stratum 6. After the grout at the corresponding smooth inner wall of the deep hole of the rock stratum 6 solidifies, the external grouting machine supplies air to the pipe 4. The air flows through the corresponding channel 91 and the one-way valve 2 into the flow channel 11 connected to the through hole 12, and then flows from the through hole 12 into the cavity 13, causing the airbag 3 to expand and press against the smooth inner wall of the deep hole of the rock stratum 6, sealing the deep hole of the rock stratum 6. Then, the external grouting machine stops supplying air and controls the external grouting machine to supply air to the pipe 4. Pipe 4 delivers the joint filler grout. The grout flows through channel 91 and check valve 2 into flow channel 11, which connects to the deep hole of rock member 6. It then flows from flow channel 11 into the deep hole. Once the deep hole is filled, the pressure inside rises, causing the grout to fill the cracks in rock member 6 under pressure. When the external grouting machine detects that the pressure of the grout inside pipe 4 reaches a threshold, it stops delivering grout to pipe 4. Then, pipe 4 is manually unscrewed from connecting block 1. At this point, the inflated airbag 3 secures its components in the deep hole of rock member 6, continuing to block the hole and preventing the undried grout from flowing out, thus completing the grouting and reinforcement operation of rock member 6.The new connecting block 1 and its components are manually installed on pipe 4. Grouting reinforcement is then performed on the next location of the rock stratum component 6. During use, the grout is injected into the cracks of the rock stratum component 6 through the connecting block 1, and then smeared into the cracks to smooth the connection between the deep hole and the crack. Afterwards, the airbag 3 is inflated to fix its components in the deep hole of the rock stratum component 6, preventing the airbag 3 from bursting at the sharp connection between the deep hole and the crack, thus avoiding affecting the grouting filling effect.

[0036] It should be noted that if the acoustic sensor 5 does not detect a crack at the rock layer 6 corresponding to the airbag 3, the connecting block 1 and its parts are manually reset to the predetermined position of the initial insertion into the deep hole of the rock layer 6 through the pipe 4, and then the airbag 3 is directly inflated to perform the deep hole filling operation of the crack repair grout.

[0037] After the jointing block 1 applies the joint sealant into the crack in the rock stratum component 6, the sealant needs time to solidify. If the airbag 3 is directly controlled to expand, the expanded airbag 3 will push the sealant when it comes into contact with the still-wet sealant, causing the airbag 3 to bulge into the crack in the rock stratum component 6, which still poses a risk of rupture. At this point, the pipe 4 should be disassembled, and then the cracks in the remaining deep holes and the positions directly opposite the airbag 3 should be sealed. The sealing operation should continue until all the cracks in the deep holes and the positions directly opposite the airbag 3 are sealed. After the initial filling grout applied to the cracks in rock component 6 has solidified, the pipe 4 is then manually connected to the connecting block 1, followed by grouting reinforcement. Grouting reinforcement is then performed on the other deep holes in rock component 6 sequentially to achieve continuous construction and ensure efficiency. However, the sealing positions of the deep holes in rock component 6 are relatively deep, and the distance between the connecting block 1 and the deep hole port of rock component 6 is relatively far, making it relatively difficult to manually screw the pipe 4 back onto the connecting block 1. Therefore, when connecting block 1 and pipe 4... Connector 201 and pipe 202 are added between 4. After the joint filler grout is applied into the crack of the deep hole by connector 1, pipe 4 is manually unscrewed from connector 201. Then, the external grouting machine is controlled to perform the next joint filling operation. At this time, due to the extension of pipe 202, connector 201, as the end, is located outside the deep hole of rock component 6. After the joint filler grout has cured, pipe 4 can be easily screwed into connector 201 located outside the deep hole of rock component 6, and then grouting reinforcement operation is performed. After the grouting reinforcement operation is completed, the pipe 202 is manually unscrewed from the connecting block 1, leaving only the connecting block 1 and its parts in the deep hole of the rock stratum 6 for the plugging operation. During use, with the extension of the pipe 202, the connector 201, which serves as the port, is located outside the deep hole of the rock stratum 6. After the grout has cured, the pipe 4 can be easily screwed into the connector 201 for the grouting reinforcement operation, avoiding the connection difficulties caused by the connecting block 1 being located deep in the deep hole of the rock stratum 6.

[0038] Example 2, based on Example 1, as shown in Figures 5-7, further includes a fixing component, which includes a circular tube 203, a rubber block 204, and a ring 205; the circular tube 203 is slidably connected to the outside of the second pipe 202, and the circular tube 203 is made of a lightweight alloy material; the rubber block 204 is fixedly connected to the circular tube 203; the ring 205 is connected to the circular tube 203; an elastic part 93 is provided on the circular tube 203; the outer diameter of the elastic part 93 increases from bottom to top; the inner diameter of the ring 205 decreases from bottom to top; the elastic part 93 and the ring 205 are threadedly connected.

[0039] The rubber block 204 is smaller at the top and larger at the bottom, making it easier to insert the rubber block 204 into the hole of the rock layer component 6.

[0040] The outer surface of the ring 205 has anti-slip grooves, making it easier for people to twist the ring 205.

[0041] The inclined portion 18 of the connecting block 1 is provided with six fin portions 110.

[0042] Both the beveled portion 18 and the fin portion 110 are made into rough surfaces to increase their adhesion to the sealant.

[0043] Airbag 3 is made of puncture-resistant material to reduce the chance of rupture.

[0044] The end of pipe 4 is chamfered to make it easier to screw pipe 4 into connector 1 or connector 201.

[0045] During the curing of the joint sealant, although the annular portion 17 and flange portion 19 of the connecting block 1 are in close contact with the deep hole of the rock layer 6, and the joint sealant has adhesive properties, the joint sealant is not completely hardened, and the bonding effect is unstable. Furthermore, the close contact between the annular portion 17 and flange portion 19 and the deep hole of the rock layer 6 cannot guarantee stability, and there is still a risk of detachment. Therefore, a fixing component is installed on the pipe 202. After the joint sealant is sprayed, the round pipe 203 and its components are manually moved upwards, causing the round pipe 203 to drive the rubber block 204 into the deep hole port of the rock layer 6. The annular ring 205 and the round pipe... The components 203 are connected by threads. The ring 205 is manually rotated, causing it to move upwards. The outer diameter of the elastic part 93 increases from bottom to top, while the inner diameter of the ring 205 decreases from bottom to top. This causes the upward-moving ring 205 to press the elastic part 93 inwards, thus pressing the elastic part 93 tightly onto the pipe 202. This fixes the connecting block 1 and its parts onto the deep hole of the rock layer 6, preventing it from falling off. In use, the round pipe 203, rubber block 204, and ring 205 work together to fix the connecting block 1 and its parts onto the deep hole of the rock layer 6, reducing the risk of falling off.

[0046] In the final stage of the joint filling operation, after the airbag 3 inflates, the joint filling slurry flows out through the flow channel 11, which is connected to the deep hole of the rock layer component 6. At the same time, the joint filling slurry fills the space between the connecting block 1 and the rock layer component 6 through the opening 16, thereby making the joint filling slurry in close contact with the fin portion 110. This improves the adhesion stability of the joint filling slurry to the connecting block 1 and the parts on it. Together with the fixing component, the connecting block 1 and the parts on it are fixed, further reducing the risk of falling off and providing strong stability.

[0047] The above embodiments are only for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the content of the present invention and implement it accordingly. They should not be construed as limiting the scope of protection of the present invention. All equivalent changes or modifications made in accordance with the spirit and essence of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A multifunctional high-pressure grouting device for coal mine rock strata, comprising a connecting block (1); an air bladder (3) is fixedly connected to the connecting block (1); characterized in that: It also includes a one-way valve (2), a pipe (4), and an acoustic sensor (5); several one-way valves (2) are installed at the lower part of the connecting block (1); several flow channels (11) are opened on the connecting block (1), and each flow channel (11) is connected to the one-way valve (2) below it; a pipe (4) is connected to the lower side of the connecting block (1); several channels (91) are opened inside the pipe (4), and each channel (91) is connected to the one-way valve (2) above it; a through hole (12) is opened on the connecting block (1); a cavity (13) is formed between the connecting block (1) and the airbag (3), and the cavity (12) is connected to the airbag (3). 3) The flow channel (11) connected to the through hole (12) is connected; the connecting block (1) is provided with the through hole (14); the connecting block (1) is provided with the cavity (15), and the cavity (15) is connected to the flow channel (11) connected to the through hole (14); the connecting block (1) is provided with the opening (16), and the opening (16) is connected to the cavity (15); the connecting block (1) is provided with the annular part (17); the connecting block (1) is provided with the inclined part (18); the connecting block (1) is provided with the flange (19), and the inclined part (18) is located between the annular part (17) and the flange (19).

2. The multifunctional high-pressure grouting equipment for coal mine rock strata according to claim 1, characterized in that: The outer surface of the connecting block (1) is set to a smooth surface.

3. The multifunctional high-pressure grouting equipment for coal mine rock strata according to claim 1, characterized in that: It also includes auxiliary components, including a connector (201) and a second pipe (202); the connector (201) is screwed onto the first pipe (4); the second pipe (202) is fixed onto the connector (201), and the second pipe (202) is screwed onto the connecting block (1); a number of channels (92) are provided inside the second pipe (202), and the channels (92) are connected to the corresponding channels (91), and the channels (92) are connected to the corresponding check valves (2).

4. A multi-functional high-pressure grouting device for coal mine rock strata according to claim 3, characterized in that: It also includes a fixing component, which includes a round tube (203), a rubber block (204) and a ring (205); the round tube (203) is slidably connected to the outside of the second pipe (202); the rubber block (204) is fixedly connected to the round tube (203); the ring (205) is connected to the round tube (203); the round tube (203) is provided with an elastic part (93); the outer diameter of the elastic part (93) increases from bottom to top; the inner diameter of the ring (205) decreases from bottom to top; the elastic part (93) is threadedly connected to the ring (205).

5. A multi-functional high-pressure grouting device for coal mine rock strata according to claim 4, characterized in that: The rubber block (204) is small at the top and large at the bottom.

6. A multi-functional high-pressure grouting device for coal mine rock strata according to claim 4, characterized in that: The outer surface of the ring (205) is provided with anti-slip grooves.

7. A multi-functional high-pressure grouting device for coal mine rock strata according to claim 1, characterized in that: Several finned portions (110) are provided on the inclined portion (18) of the connecting block (1).

8. A multi-functional high-pressure grouting device for coal mine rock strata according to claim 7, characterized in that: Both the beveled part (18) and the fin part (110) are made into rough surfaces.

9. A multi-functional high-pressure grouting device for coal mine rock strata according to claim 1, characterized in that: The airbag (3) is made of puncture-resistant material.

10. A multi-functional high-pressure grouting device for coal mine rock strata according to claim 1, characterized in that: The end of pipe 1 (4) is chamfered.

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