Deep well double-channel grouting equipment and method

Abstract

The invention belongs to the technical field of mine engineering, and particularly relates to deep well double-channel grouting equipment and method. The slurry mixing assembly comprises an inner-layer pipe, an inner-layer pipe body of the inner-layer pipe is contained in an inner cavity of an outer-layer pipe body of the outer-layer pipe, one end of the inner-layer pipe body is fixedly connected with one end of the outer-layer pipe body, the position, close to the connecting position, of the inner-layer pipe body is the front end, and a cavity between the outer wall of the inner-layer pipe body and the inner wall of the outer-layer pipe body is communicated with the outside through a first inflow hole. An inner cavity of the inner-layer pipe body is communicated with the outside through a second inflow hole in the front end of the inner-layer pipe body, and a plurality of through-flow holes are formed in the pipe wall of the inner-layer pipe body in the circumferential direction. According to the invention, the failure and blockage of different slurries during mixing in the mixer can be avoided, so that the mixing uniformity of the two different slurries is ensured, the linkage efficiency between the hydraulic driving system and the grouting piston assembly can be improved, and the pressure of the mixed slurry in the mixing cavity is kept stable.

Description

Technical Field

[0001] This invention belongs to the field of mining engineering technology, specifically relating to a deep well dual-channel grouting equipment and method. Background Technology

[0002] In mining operations, especially in deep mines, water inrush and gushing are major hazards threatening production safety and human lives. When a water inrush accident occurs, quickly and effectively sealing the water inrush channel is crucial for disaster relief and preventing the escalation of the disaster. Grouting technology is currently the most direct and effective method for controlling such water hazards. Its core lies in injecting a grout material with solidification properties into formation fissures or water inrush channels using high-pressure equipment to achieve rapid water stoppage and reinforcement. In emergency grouting under complex hydrogeological conditions in deep wells, it is often necessary to use two different grouts, such as a fast-setting grout and a high-strength grout, for efficient mixing and synergistic injection to achieve the dual goals of rapid gelation and long-term stability.

[0003] Chinese invention patent application CN202411857634.9 discloses a grouting device for geological disaster control, comprising a conveying pipe, a filling cone, an automatic telescopic mechanism, an elastic adjustment mechanism, and a longitudinal discharging mechanism. The filling cone is connected to the top of the conveying pipe. The automatic telescopic mechanism is located inside the conveying pipe and moves synchronously with the filling grout entering the conveying pipe from the filling cone. The elastic adjustment mechanism is installed on the conveying pipe, with one end hinged to a movable plate in the automatic telescopic mechanism. The elastic adjustment mechanism moves synchronously with the automatic telescopic mechanism during operation. The longitudinal discharging mechanism is arranged inside the conveying pipe and is used to add reinforcing components during the conveying of the filling grout. This allows the device to automatically adjust its telescopic state according to the grouting process, adapting to geological cracks of different widths and improving its applicability. Furthermore, by sequentially adding multiple reinforcing components to the grout during grouting, the structural strength of the grout after solidification is enhanced, preventing subsequent cracking.

[0004] However, conventional static mixers or external mixing devices are prone to failure and blockage under high pressure, and the uniformity of mixing two different grouts is difficult to guarantee. Even when two grouts of different densities are fed into the mixer, unstable pressure at the two inlets can cause one grout to become blocked outside the mixer inlet, affecting the grout solidification effect and delaying emergency grouting. Furthermore, the linkage efficiency between the hydraulic drive system and the grouting piston assembly of existing equipment, as well as the grout pressure within the mixing chamber, are difficult to maintain stably. This often fails to meet the urgent need for continuous, stable, and controllable grouting processes in emergency operations, and also poses risks of grout backflow and contamination of the grout supply system. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a deep well dual-channel grouting device. Through the coordinated operation of the mixing assembly, base plate, oil tank, hydraulic assembly, piston grouting assembly, and outlet pipe, this invention not only prevents failures and blockages during mixing of different grouts in the mixer, ensuring the uniformity of the mixing of the two different grouts, but also avoids situations where one grout of different densities becomes blocked outside the mixer inlet due to unstable pressure, enhancing the solidification effect of the mixed grout and maximizing the opportunity for emergency grouting. Furthermore, this invention improves the linkage efficiency between the hydraulic drive system and the grouting piston assembly, maintaining stable pressure of the mixed grout within the mixing chamber. This meets the requirements for continuous, stable, and controllable mixing and grouting processes in emergency operations, reducing the risk of grout backflow and contamination of the grout supply system.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A deep well dual-channel grouting device includes a base plate. An oil tank is fixedly connected to one side of the base plate, and a support is fixedly connected to the other side. A piston grouting assembly is fixedly installed on the support. The piston grouting assembly and the oil tank are interconnected via a hydraulic assembly. A first grout tank and a second grout tank are fixed side-by-side on the base plate and located at the lower part of the support. A grout mixing assembly is fixedly connected to the top of the support. A first piston grouting pipe and a second piston grouting pipe are fixed side-by-side on the support and located between the first grout tank and the grout mixing assembly. The hydraulic assembly is configured such that, when the hydraulic motor is started, it drives a hydraulic pump to alternately deliver hydraulic oil from the oil tank to the rod-side chambers of the first and second piston grouting pipes. The rodless chambers of the first and second piston grouting pipes are interconnected. The first and second piston grouting pipes alternately draw grout from the first and second grout tanks into the first and second inlet holes at the front end of the grout mixing assembly, respectively. The mixing assembly includes an inner tube, the inner tube body of which is housed within the inner cavity of the outer tube of the outer tube. One end of the inner tube body is fixedly connected to one end of the outer tube body, with the end closest to the connection being the front end. The cavity between the outer wall of the inner tube body and the inner wall of the outer tube body communicates with the outside through a first inlet hole. The inner cavity of the inner tube body communicates with the outside through a second inlet hole at the front end of the inner tube body. Multiple flow holes are circumferentially formed on the wall of the inner tube body. A flow-blocking ring is fixedly connected to the inner wall surface of the inner tube body, located between the flow holes and the rear end of the inner tube body. A flow-blocking sleeve is slidably fitted onto the rear end of the inner tube body. The sleeve body is slidably fitted onto the outer wall of the inner tube body, with a flow-blocking ring fixedly connected to one end of the sleeve body. The outer edge of the flow-blocking ring is attached to the inner wall of the outer tube body, and a top block is fixedly connected to the center of the flow-blocking ring. The hammer rod of the flow-blocking hammer is slidably inserted into the center of the top block, with a hammer head and a hammer tail plate fixedly connected to both ends of the hammer rod, respectively. The rear end of the outer tube is fixedly connected to the front end of the tube cap, the rear end of the tube cap is connected to the slurry outlet pipe, and multiple telescopic baffles are located between the tube cap and the flow-blocking sleeve and are fixedly connected to the inner wall of the outer tube.

[0007] Furthermore, the length of the hammer head is greater than the distance between the rear end of the inner tube and the telescopic stop. The flow-blocking sleeve is configured such that when the flow-blocking ring approaches the rear end of the inner tube, the sleeve covers the flow passage, the hammer head blocks the central hole of the flow-blocking ring, and the telescopic stop locks the hammer tail plate. When the flow-blocking ring slides towards the rear end, the cavity between the outer wall of the inner tube and the inner wall of the outer tube communicates with the inner cavity of the inner tube. The telescopic stop releases the hammer tail plate, the flow-blocking hammer slides towards the rear end, and the cavity between the rear end of the flow-blocking ring and the tube cover communicates with the inner cavity of the inner tube through the central hole of the flow-blocking ring.

[0008] Furthermore, the telescopic stop bar includes a rod body, one end of which is fixedly connected to a stop block and has an inclined push surface, the stop block and the inclined push surface are arranged opposite to each other, and the other end of the rod body is slidably connected to a telescopic rod, on which a rod spring is fitted.

[0009] Furthermore, the top block has an inclined surface on the side near the telescopic stop rod. When the flow-blocking sleeve slides towards the rear end, the inclined surface of the top block comes into contact with the inclined push surface and pushes the telescopic rod to retract. The stop block moves towards the inner wall of the outer tube, and the hammer tail plate that is locked with the stop block is released.

[0010] Furthermore, the outer tube includes a retaining ring, which is housed within the outer tube and located between the flow-blocking sleeve and the tube cap, with the outer edge of the retaining ring fixedly connected to the inner wall of the outer tube.

[0011] Furthermore, the outer tube includes a compression spring, with both ends of the compression springs fixedly connected to the retaining ring and the flow-blocking ring, respectively.

[0012] Furthermore, the flow-blocking hammer includes a baffle plate, which is fixedly connected to the hammer rod and located between the hammer head and the hammer tail plate, and the baffle plate is blocked by the top block at the center of the flow-blocking ring.

[0013] Furthermore, a first flange is fixedly connected to the front end of the inner tube, and a second flange is fixedly connected to the front end of the outer tube; the first flange and the second flange are detachably connected.

[0014] Furthermore, the hydraulic assembly includes a directional valve, which is connected to the hydraulic pump via a check valve. The two outlets of the directional valve are respectively connected to the first piston grouting pipe and the second piston grouting pipe, and the return port of the directional valve is connected to the oil tank. An overflow valve is installed on the hydraulic pump, with its outlet connected to the cooler inlet, and the cooler outlet connected to the oil tank.

[0015] This invention also claims a grouting method using the aforementioned deep well dual-channel grouting equipment, comprising the following steps: S101: Add slurry A to the first slurry tank and add slurry B to the second slurry tank; S102: Start the hydraulic assembly, the hydraulic motor rotates, and the hydraulic oil in the oil tank is delivered to the first piston grouting pipe and the second piston grouting pipe in turn, so that the first piston grouting pipe and the second piston grouting pipe respectively draw grout A and grout B from the first grout tank and the second grout tank to the grout mixing assembly. S103: Slurry A is drawn into the first inlet hole and enters the cavity between the outer wall of the inner tube and the inner wall of the outer tube; slurry B is drawn into the second inlet hole and enters the inner cavity of the inner tube. S104: Slurry B flows towards the rear end of the inner pipe body and is blocked at the wall composed of the baffle ring and hammer head; slurry A flows towards the rear end of the outer pipe body and is blocked at the baffle ring. S105: Slurry A continues to flow and pushes the flow-blocking ring towards the rear end of the outer tube. At the same time, the flow-blocking ring drives the sleeve fitted on the outer wall of the inner tube to slide, and the flow hole covered by the sleeve gradually opens. S106: The flow passage is opened so that the cavity between the outer wall of the inner tube and the inner wall of the outer tube is connected to the inner cavity of the inner tube. Slurry A flows into the inner cavity of the inner tube and mixes with slurry B. The flow-blocking hammer is stuck by the telescopic stop bar and does not slide. S107: While slurry A and slurry B are being mixed, the flow-blocking sleeve continues to slide toward the telescopic baffle until the top block in the center of the flow-blocking sleeve pushes the telescopic baffle up and contracts. The flow-blocking hammer is no longer stuck and slides toward the rear end of the outer tube until the middle of the wall composed of the flow-blocking ring and the hammer head is opened. S108: The mixture of slurry A and slurry B, after being fully mixed, flows into the rear end of the outer pipe through the hole in the middle of the baffle ring, and then flows through the pipe cover into the slurry outlet pipe for grouting operations in deep wells.

[0016] Compared with the prior art, the present invention has the following beneficial effects: (1) This invention can avoid failure and blockage when different slurries are mixed in the mixer, and ensure the uniformity of the mixing of the two different slurries. When the slurries are mixed, slurry A is drawn into the first inlet hole and enters the cavity between the outer wall of the inner tube and the inner wall of the outer tube. Slurry B is drawn into the second inlet hole and enters the inner cavity of the inner tube. Slurry B flows towards the rear end of the inner tube and is blocked at the wall composed of the baffle ring and the hammer. Slurry A flows towards the rear end of the outer tube and is blocked at the baffle ring. Slurry A continues to flow and pushes the baffle ring to slide towards the rear end of the outer tube. At the same time, the baffle ring drives the sleeve fitted on the outer wall of the inner tube to slide. The flow hole covered by the sleeve gradually opens. At this time, the hammer tail plate of the baffle hammer is stuck by the stop block of the telescopic stop rod and will not slide. The wall formed by the baffle ring and hammer head can still block the slurry from passing through the inner tube's internal cavity. The opening of the flow passage connects the cavity between the outer wall of the inner tube and the inner wall of the outer tube with the inner tube's internal cavity. Slurry A flows into the inner tube's internal cavity and mixes with slurry B. While slurry A and slurry B are mixing, the baffle sleeve continues to slide towards the telescopic stop until the top block in the center of the baffle sleeve lifts the telescopic stop. The baffle hammer, no longer blocked by the stop block, slides towards the rear end of the outer tube until the middle of the wall formed by the baffle ring and hammer head is cleared. The fully mixed slurry A and slurry B flows through the hole in the middle of the baffle ring to the rear end of the outer tube, and then through the pipe cover into the slurry outlet pipe for grouting and plugging water in seepage fractures in deep wells. This avoids the situation where one of the slurries of different densities is blocked outside the mixer inlet due to unstable pressure, enhances the solidification effect of the mixed slurry, and buys time for emergency grouting.

[0017] (2) This invention can also improve the linkage efficiency between the hydraulic drive system and the grouting piston assembly, and maintain the pressure stability of the mixed slurry in the mixing chamber. Because the outer tube includes a pressure spring, and the two ends of the multiple pressure springs are respectively fixedly connected to the retaining ring and the flow-blocking ring, when slurry A is injected into the cavity between the outer wall of the inner tube and the inner wall of the outer tube, slurry A will gradually squeeze the flow-blocking ring, and the flow-blocking ring will gradually slide towards the retaining ring. Under the tension of the pressure spring, the pressure at the flow-blocking ring and inside the mixed slurry will gradually accumulate and increase. The magnitude of the increase in pressure inside the mixed slurry is... The pressure will be greater than the tension of the compression spring, and the pressure inside the mixed slurry is stable and accumulated until the flow-blocking ring is close to the retaining ring. The top block in the center of the flow-blocking sleeve will push up and retract the telescopic rod, and the flow-blocking hammer will not be stuck and will slide towards the rear end of the outer tube until the middle of the wall formed by the flow-blocking ring and the hammer head is opened. The mixed slurry, which has accumulated enough stable pressure, begins to flow into the rear end of the outer tube and then through the pipe cover into the slurry outlet pipe for grouting operations in deep wells. This meets the needs of continuous, stable and controllable mixed grouting process in emergency operations and reduces the risk of slurry backflow and contamination of the slurry supply system. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of a deep well dual-channel grouting device according to the present invention. Figure 1 ; Figure 2 This is a schematic diagram of the overall structure of a deep well dual-channel grouting device according to the present invention. Figure 2 ; Figure 3 This is an exploded structural diagram of the grout mixing component of a deep well dual-channel grouting device according to the present invention; Figure 4 This is a schematic diagram of the inner tube structure of a deep well dual-channel grouting device according to the present invention; Figure 5 This is a schematic diagram of the outer pipe structure of a deep well dual-channel grouting device according to the present invention; Figure 6 This is a schematic diagram of the telescopic stop structure of a deep well dual-channel grouting device according to the present invention; Figure 7 This is a schematic diagram of the flow-restricting hammer structure of a deep well dual-channel grouting device according to the present invention; Figure 8 This is a schematic diagram of the flow-blocking sleeve structure of a deep well dual-channel grouting device according to the present invention; Figure 9 This is a schematic diagram of the cross-sectional structure of the grout mixing component of a deep well dual-channel grouting device according to the present invention. Figure 1 ; Figure 10 This is a schematic diagram of the cross-sectional structure of the grout mixing component of a deep well dual-channel grouting device according to the present invention. Figure 2 ; Figure 11 This is a schematic diagram of the cross-sectional structure of the grout mixing component of a deep well dual-channel grouting device according to the present invention. Figure 3 ; Figure 12 This is a schematic diagram of the cross-sectional structure of the grout mixing component of a deep well dual-channel grouting device according to the present invention. Figure 4 ; Figure 13 This is a flowchart of a grouting method using a deep well dual-channel grouting device according to the present invention.

[0019] The attached figures are labeled as follows: 100. Base plate; 101. Bracket; 200. Fuel tank; 300. Hydraulic components; 301. Hydraulic motor; 302. Hydraulic pump; 303. Directional control valve; 304. Relief valve; 305. Cooler; 306. Check valve; 400. Piston grouting assembly; 401. First piston grouting fitting; 402. Second piston grouting fitting; 403. First grout box; 404. Second grout box; 500. Mixing assembly; 501. Inner tube; 5011. Inner tube body; 5012. First flange; 5013. First inlet hole; 5014. Flow passage hole; 5015. Baffle ring; 5016. Second inlet hole; 502. Outer tube; 5021. Outer tube body; 5022. Second flange; 5023. Baffle ring; 5024. Compression spring; 5025. Telescopic... Stop bar; 50251, bar body; 50252, inclined push surface; 50253, stop block; 50254, telescopic bar; 50255, bar spring; 503, flow-blocking hammer; 5031, hammer rod; 5032, hammer head; 5033, hammer tail plate; 5034, baffle plate; 504, flow-blocking sleeve; 5041, sleeve body; 5042, flow-blocking ring; 5043, top block; 505, pipe cover; 600. Slurry outlet pipe; 700. Circular wheel. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to embodiments. Of course, the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0021] Although the steps in this invention are arranged by reference numerals, this is not intended to limit the order of the steps. Unless the order of the steps is explicitly stated or the execution of a step requires other steps as a basis, the relative order of the steps can be adjusted. It is understood that the term "and / or" as used herein refers to and covers any and all possible combinations of one or more of the associated listed items.

[0022] Example like Figures 1-13As shown, a deep well dual-channel grouting device includes a base plate 100. An oil tank 200 is fixedly connected to one side of the base plate 100, and a bracket 101 is fixedly connected to the other side. A piston grouting assembly 400 is fixedly installed on the bracket 101. The piston grouting assembly 400 and the oil tank 200 are interconnected by a hydraulic assembly 300. A first grout tank 403 and a second grout tank 404 are fixed side by side on the base plate 100 and located at the lower part of the bracket 101. A grout mixing assembly 500 is fixedly connected to the top of the bracket 101. A first piston grouting pipe 401 and a second piston grouting pipe 402 are fixed side by side on the bracket 101 and located between the first grout tank 403 and the grout mixing assembly 500. The hydraulic component 300 is configured such that, when the hydraulic motor 301 is started, it drives the hydraulic pump 302 to alternately deliver the hydraulic oil in the oil tank 200 to the rod chambers of the first piston grouting pipe 401 and the second piston grouting pipe 402. The rodless chambers of the first piston grouting pipe 401 and the second piston grouting pipe 402 are interconnected. The first piston grouting pipe 401 and the second piston grouting pipe 402 alternately draw the slurry from the first slurry tank 403 and the second slurry tank 404 into the first inlet hole 5013 and the second inlet hole 5016 at the front end of the slurry mixing component 500. The mixing assembly 500 includes an inner tube 501. The inner tube body 5011 of the inner tube 501 is housed in the inner cavity of the outer tube body 5021 of the outer tube 502. One end of the inner tube body 5011 is fixedly connected to one end of the outer tube body 5021, with the front end near the connection point. The cavity between the outer wall of the inner tube body 5011 and the inner wall of the outer tube body 5021 is connected to the outside through a first inlet hole 5013. The inner cavity of the inner tube body 5011 is connected to the outside through a second inlet hole 5016 at the front end of the inner tube body 5011. The inner tube body 5011 has multiple flow holes 5014 circumferentially opened on its tube wall. A flow-blocking ring 5015 is fixedly connected to the inner wall surface of the inner tube body 5011. The flow-blocking ring 5015 is located between the flow holes 5014 and the rear end of the inner tube body 5011. The inner tube 5011 is slidably fitted with a flow-blocking sleeve 504 at its rear end. The sleeve body 5041 of the flow-blocking sleeve 504 is slidably fitted onto the outer wall of the inner tube 5011. One end of the sleeve body 5041 is fixedly connected to a flow-blocking ring 5042. The outer edge of the flow-blocking ring 5042 is attached to the inner wall of the outer tube 5021. A top block 5043 is fixedly connected to the center of the flow-blocking ring 5042. The hammer rod 5031 of the flow-blocking hammer 503 is slidably inserted into the center of the top block 5043. The hammer head 5032 and the hammer tail plate 5033 are fixedly connected to both ends of the hammer rod 5031, respectively. The rear end of the outer tube 5021 is fixedly connected to the front end of the pipe cover 505. The rear end of the pipe cover 505 is connected to the slurry outlet pipe 600. Multiple telescopic baffles 5025 are located between the pipe cover 505 and the flow-blocking sleeve 504 and are fixedly connected to the inner wall of the outer tube 5021.

[0023] In this invention, slurry A is first added to the first slurry tank 403, and slurry B is added to the second slurry tank 404. Then, the hydraulic assembly 300 is started, and the hydraulic motor 301 rotates, alternately delivering the hydraulic oil in the oil tank 200 to the first piston grouting pipe 401 and the second piston grouting pipe 402. This allows the first piston grouting pipe 401 and the second piston grouting pipe 402 to draw slurry A and slurry B from the first slurry tank 403 and the second slurry tank 404, respectively, to the mixing assembly 500. Slurry A is drawn into the first inlet hole 5013 and enters the cavity between the outer wall of the inner tube 5011 and the inner wall of the outer tube 5021, while slurry B is drawn into the second inlet hole 5013. 16. Slurry B flows into the inner cavity of the inner tube 5011 and is blocked at the wall formed by the baffle ring 5015 and the hammer head 5032. Slurry A flows towards the rear end of the outer tube 5021 and is blocked at the flow-blocking ring 5042. Slurry A continues to flow and pushes the flow-blocking ring 5042 to slide towards the rear end of the outer tube 5021. At the same time, the flow-blocking ring 5042 drives the sleeve 5041, which is fitted onto the outer wall of the inner tube 5011, to slide. The flow hole 5014, which was covered by the sleeve 5041, gradually opens. At this time, the hammer tail plate 5033 of the flow-blocking hammer 503 is stuck by the stop block 50253 of the telescopic stop bar 5025 and will not slide. Furthermore, the length of the hammer head 5032 is greater than the distance between the rear end of the inner tube 5011 and the telescopic baffle 5025. Therefore, even when the flow-blocking hammer 503 is stuck by the telescopic baffle 5025, the wall formed by the flow-blocking ring 5015 and the hammer head 5032 can still block the slurry from passing through the inner cavity of the inner tube 5011. The opening of the flow hole 5014 connects the cavity between the outer wall of the inner tube 5011 and the inner wall of the outer tube 5021 with the inner cavity of the inner tube 5011. Slurry A flows into the inner cavity of the inner tube 5011 and mixes with slurry B. While slurry A and slurry B are mixing, the flow-blocking sleeve 504 continues to move towards the telescopic baffle 5025. The slide continues until the inclined surface of the top block 5043 at the center of the flow-blocking sleeve 504 contacts the inclined push surface 50252 of the telescopic stop rod 5025, which lifts up the telescopic stop rod 5025. The telescopic rod 50254 retracts, and the hammer tail plate 5033 of the flow-blocking hammer 503 slides toward the rear end of the outer tube body 5021 without being blocked by the stop block 50253, until the middle of the wall composed of the flow-blocking ring 5015 and the hammer head 5032 is opened. The mixture of slurry A and slurry B, after being fully mixed, flows into the rear end of the outer tube body 5021 through the hole in the middle of the flow-blocking ring 5015, and then flows into the slurry pipe 600 through the pipe cover 505 to perform grouting and water plugging operations on the seepage cracks in the deep well. This can prevent failure and blockage when different slurries are mixed in the mixer, ensure the uniformity of the two different slurries, and avoid the situation where one of the slurries is blocked outside the mixer inlet due to unstable pressure when mixing slurries of different densities. This enhances the curing effect of the mixed slurry and makes it possible to seize the opportunity for emergency grouting.

[0024] It is worth noting that the piston grouting assembly 400 can unidirectionally extract grout from the grout tank and deliver it to a designated location. This is existing technology and will not be elaborated upon.

[0025] Furthermore, the length of the hammer head 5032 is greater than the distance between the rear end of the inner tube 5011 and the telescopic stop bar 5025. The flow-blocking sleeve 504 is configured such that when the flow-blocking ring 5042 approaches the rear end of the inner tube 5011, the sleeve 5041 covers the flow passage 5014, the hammer head 5032 blocks the central hole of the flow-blocking ring 5015, and the telescopic stop bar 5025 locks the hammer tail plate 5033. When the flow-blocking ring 5042 slides towards the rear end, the cavity between the outer wall of the inner tube 5011 and the inner wall of the outer tube 5021 communicates with the inner cavity of the inner tube 5011, the telescopic stop bar 5025 releases the hammer tail plate 5033, the flow-blocking hammer 503 slides towards the rear end, and the cavity between the rear end of the flow-blocking ring 5015 and the tube cap 505 communicates with the inner cavity of the inner tube 5011 through the central hole of the flow-blocking ring 5015.

[0026] Furthermore, the telescopic stop bar 5025 includes a rod body 50251, one end of which is fixedly connected to a stop block 50253 and has an inclined push surface 50252. The stop block 50253 and the inclined push surface 50252 are arranged opposite to each other. The other end of the rod body 50251 is slidably connected to a telescopic rod 50254, and a rod spring 50255 is fitted on the telescopic rod 50254.

[0027] Furthermore, the top block 5043 has an inclined surface on the side near the telescopic stop rod 5025. When the flow-blocking sleeve 504 slides towards the rear end, the inclined surface of the top block 5043 comes into contact with the inclined push surface 50252 and pushes the telescopic rod 50254 to retract. The stop block 50253 moves towards the inner wall of the outer tube body 5021, and the hammer tail plate 5033 that is locked with the stop block 50253 is released.

[0028] Furthermore, the outer tube 502 includes a retaining ring 5023, which is housed within the outer tube body 5021 and located between the flow-blocking sleeve 504 and the tube cap 505. The outer edge of the retaining ring 5023 is fixedly connected to the inner wall of the outer tube body 5021.

[0029] Furthermore, the outer tube 502 includes a compression spring 5024, and the two ends of the plurality of compression springs 5024 are respectively fixedly connected to the retaining ring 5023 and the flow-blocking ring 5042.

[0030] In this invention, the linkage efficiency between the hydraulic drive system and the grouting piston assembly can be improved, and the pressure of the mixed slurry in the mixing chamber can be kept stable. Because the outer tube 502 includes a compression spring 5024, and the two ends of the multiple compression springs 5024 are respectively fixedly connected to the retaining ring 5023 and the flow-blocking ring 5042, when slurry A is injected into the cavity between the outer wall of the inner tube 5011 and the inner wall of the outer tube 5021, slurry A will gradually squeeze the flow-blocking ring 5042. The flow-blocking ring 5042 will gradually slide towards the retaining ring 5023, and under the tension of the compression spring 5024, the pressure at the flow-blocking ring 5042 and inside the mixed slurry will gradually accumulate and increase. The magnitude of the increased pressure inside the mixed slurry will... The tension is greater than that of the compression spring 5024, and the pressure inside the mixed slurry is steadily accumulated until the flow-blocking ring 5042 is close to the retaining ring 5023. At this point, the top block 5043 in the center of the flow-blocking sleeve 504 pushes up and retracts the telescopic rod 5025. The flow-blocking hammer 503 is not stuck and slides toward the rear end of the outer tube 5021 until the middle of the wall formed by the flow-blocking ring 5015 and the hammer head 5032 is opened. The mixed slurry, which has accumulated a sufficiently stable pressure, begins to flow into the rear end of the outer tube 5021 and then through the pipe cover 505 into the slurry outlet pipe 600 for grouting operations in deep wells. This meets the requirements of continuous, stable, and controllable mixed grouting technology in emergency operations and reduces the risk of slurry backflow and contamination of the slurry supply system.

[0031] Furthermore, the flow-blocking hammer 503 includes a baffle 5034, which is fixedly connected to the hammer rod 5031 and located between the hammer head 5032 and the hammer tail plate 5033. The baffle 5034 is blocked by the top block 5043 at the center of the flow-blocking ring 5042.

[0032] Furthermore, the inner tube 5011 is fixedly connected to a first flange 5012 at its front end, and the outer tube 5021 is fixedly connected to a second flange 5022 at its front end. The first flange 5012 and the second flange 5022 are detachably connected.

[0033] Furthermore, the hydraulic assembly 300 includes a directional valve 303, which is connected to the hydraulic pump 302 via a check valve 306. The two outlets of the directional valve 303 are respectively connected to the first piston grouting pipe 401 and the second piston grouting pipe 402, and the return port of the directional valve 303 is connected to the oil tank 200. An overflow valve 304 is connected to the hydraulic pump 302, and the outlet of the overflow valve 304 is connected to the inlet of the cooler 305. The outlet of the cooler 305 is connected to the oil tank 200.

[0034] In this invention, a check valve 306 is connected between the reversing valve 303 and the hydraulic pump 302 to prevent hydraulic oil from flowing back to the hydraulic pump 302 and causing damage to it. An overflow valve 304 is connected to the hydraulic pump 302 to allow hydraulic oil with unstable pressure to flow back to the oil tank 200 after being cooled by the cooler 305, thereby enhancing the stability of the hydraulic system. These are all existing technologies and will not be described in detail here.

[0035] Furthermore, four round wheels 700 are rotatably mounted at the four corners of the base plate 100.

[0036] In this invention, the four wheels 700 installed on the base plate 100 can facilitate the movement of this equipment in the deep mine shaft to the location where grouting and joint filling are required for grouting operations.

[0037] A grouting method using the aforementioned deep well dual-channel grouting equipment includes the following steps: S101: Add slurry A to the first slurry tank 403 and add slurry B to the second slurry tank 404; S102: Start the hydraulic assembly 300, the hydraulic motor 301 rotates, and the hydraulic oil in the oil tank 200 is delivered to the first piston grouting pipe 401 and the second piston grouting pipe 402 in turn, so that the first piston grouting pipe 401 and the second piston grouting pipe 402 respectively draw slurry A and slurry B from the first slurry tank 403 and the second slurry tank 404 to the slurry mixing assembly 500. S103: Slurry A is drawn into the first inlet hole 5013 and enters the cavity between the outer wall of the inner tube 5011 and the inner wall of the outer tube 5021; slurry B is drawn into the second inlet hole 5016 and enters the inner cavity of the inner tube 5011. S104: Slurry B flows toward the rear end of the inner tube 5011 and is blocked at the wall composed of the baffle ring 5015 and the hammer 5032; slurry A flows toward the rear end of the outer tube 5021 and is blocked at the baffle ring 5042. S105: Slurry A continues to flow and pushes the flow-blocking ring 5042 to slide toward the rear end of the outer tube 5021. At the same time, the flow-blocking ring 5042 drives the sleeve 5041, which is sleeved on the outer wall of the inner tube 5011, to slide. The flow hole 5014, which is covered by the sleeve 5041, gradually opens. S106: The flow passage 5014 is opened so that the cavity between the outer wall of the inner tube 5011 and the inner wall of the outer tube 5021 is connected to the inner cavity of the inner tube 5011. Slurry A flows into the inner cavity of the inner tube 5011 and mixes with slurry B. The flow-blocking hammer 503 is stuck by the telescopic stop bar 5025 and does not slide. S107: While slurry A and slurry B are being mixed, the flow-blocking sleeve 504 continues to slide toward the telescopic baffle 5025 until the top block 5043 in the center of the flow-blocking sleeve 504 pushes the telescopic baffle 5025 up and retracts. The flow-blocking hammer 503 is not stuck and slides toward the rear end of the outer tube 5021 until the middle of the wall composed of the flow-blocking ring 5015 and the hammer head 5032 is opened. S108: The mixture of slurry A and slurry B, after being fully mixed, flows into the rear end of the outer pipe body 5021 through the middle hole of the baffle ring 5015, and then flows into the slurry outlet pipe 600 through the pipe cover 505 for grouting operations in the deep well.

[0038] The above description is only a preferred embodiment of the present invention. It should be noted that those skilled in the art can make several improvements and modifications without departing from the inventive concept of the present invention, and these all fall within the protection scope of the present invention.

Claims

1. A deep well dual-channel grouting device, characterized in that, The system includes a base plate (100), on which an oil tank (200) is fixedly connected on one side and a bracket (101) is fixedly connected on the other side. A piston grouting assembly (400) is fixedly installed on the bracket (101). The piston grouting assembly (400) and the oil tank (200) are interconnected by a hydraulic assembly (300). A first grout tank (403) and a second grout tank (404) are fixed side by side on the base plate (100) and located at the lower part of the bracket (101). A grout mixing assembly (500) is fixedly connected to the top of the bracket (101). A first piston grouting pipe (401) and a second piston grouting pipe (402) are fixed side by side on the bracket (101) and located between the first grout tank (403) and the grout mixing assembly (500). The hydraulic assembly (300) is configured such that, when the hydraulic motor (301) is started, the hydraulic pump (302) drives the hydraulic oil in the oil tank (200) to be delivered alternately to the rod chambers of the first piston grouting pipe (401) and the second piston grouting pipe (402). The rodless chambers of the first piston grouting pipe (401) and the second piston grouting pipe (402) are interconnected. The first piston grouting pipe (401) and the second piston grouting pipe (402) alternately draw the slurry in the first slurry tank (403) and the second slurry tank (404) into the first inlet hole (5013) and the second inlet hole (5016) at the front end of the slurry mixing assembly (500). The mixing assembly (500) includes an inner tube (501), the inner tube body (5011) of the inner tube (501) being housed within the inner cavity of the outer tube body (5021) of the outer tube (502). One end of the inner tube body (5011) is fixedly connected to one end of the outer tube body (5021), with the end closest to the connection being the front end. The cavity between the outer wall of the inner tube body (5011) and the inner wall of the outer tube body (5021) is emptied through a first inlet hole (5011). 13) Connected to the outside world, the inner cavity of the inner tube (5011) is connected to the outside world through the second inlet hole (5016) at the front end of the inner tube (5011). The inner tube (5011) has multiple flow holes (5014) circumferentially opened on the tube wall. A baffle ring (5015) is fixedly connected to the inner wall surface of the inner tube (5011). The baffle ring (5015) is located between the flow holes (5014) and the rear end of the inner tube (5011). The inner tube (5011) is slidably fitted with a flow-blocking sleeve (504) at its rear end. The sleeve (5041) of the flow-blocking sleeve (504) is slidably fitted onto the outer wall of the inner tube (5011). One end of the sleeve (5041) is fixedly connected to a flow-blocking ring (5042). The outer edge of the flow-blocking ring (5042) is attached to the inner wall of the outer tube (5021). The center of the flow-blocking ring (5042) is fixedly connected to a top block (5043). The hammer rod (5031) of the flow-blocking hammer (503) is slidably inserted into the center of the top block (5043). The two ends of the hammer rod (5031) are fixedly connected to a hammer head (5032) and a hammer tail plate (5033) respectively. The rear end of the outer tube (5021) is fixedly connected to the front end of the tube cap (505), the rear end of the tube cap (505) is connected to the slurry outlet pipe (600), and multiple telescopic baffles (5025) are located between the tube cap (505) and the flow-blocking sleeve (504) and are fixedly connected to the inner wall of the outer tube (5021).

2. The deep well dual-channel grouting equipment according to claim 1, characterized in that, The length of the hammer (5032) is greater than the distance between the rear end of the inner tube (5011) and the telescopic stop (5025); The flow-blocking sleeve (504) is configured such that when the flow-blocking ring (5042) approaches the rear end of the inner tube body (5011), the sleeve body (5041) covers the flow passage hole (5014), the hammer head (5032) blocks the center hole of the flow-blocking ring (5015), and the telescopic stop bar (5025) locks the hammer tail plate (5033). When the flow-blocking ring (5042) slides toward the rear end, the cavity between the outer wall of the inner tube (5011) and the inner wall of the outer tube (5021) is connected to the inner cavity of the inner tube (5011). The telescopic stop rod (5025) releases the hammer tail plate (5033), and the flow-blocking hammer (503) slides toward the rear end. The cavity between the rear end of the flow-blocking ring (5015) and the pipe cover (505) is connected to the inner cavity of the inner tube (5011) through the central hole of the flow-blocking ring (5015).

3. The deep well dual-channel grouting equipment according to claim 2, characterized in that, The telescopic stop bar (5025) includes a rod body (50251), one end of which is fixedly connected to a stop block (50253) and has an inclined push surface (50252). The stop block (50253) and the inclined push surface (50252) are arranged opposite to each other. The other end of the rod body (50251) is slidably connected to a telescopic rod (50254), and a rod spring (50255) is fitted on the telescopic rod (50254).

4. The deep well dual-channel grouting equipment according to claim 3, characterized in that, The top block (5043) has an inclined surface on the side near the telescopic stop (5025). When the flow-blocking sleeve (504) slides towards the rear end, the inclined surface of the top block (5043) and the inclined push surface (50252) come into contact and push the telescopic rod (50254) to retract. The stop block (50253) moves towards the inner wall of the outer tube (5021), and the hammer tail plate (5033) that is stuck with the stop block (50253) is released.

5. The deep well dual-channel grouting equipment according to claim 1, characterized in that, The outer tube (502) includes a retaining ring (5023), which is housed within the outer tube body (5021) and located between the flow-blocking sleeve (504) and the tube cap (505). The outer edge of the retaining ring (5023) is fixedly connected to the inner wall of the outer tube body (5021).

6. The deep well dual-channel grouting equipment according to claim 5, characterized in that, The outer tube (502) includes a compression spring (5024), and the two ends of the multiple compression springs (5024) are respectively fixedly connected to the retaining ring (5023) and the flow-blocking ring (5042).

7. The deep well dual-channel grouting equipment according to claim 1, characterized in that, The flow-blocking hammer (503) includes a baffle (5034), which is fixedly connected to the hammer rod (5031) and located between the hammer head (5032) and the hammer tail plate (5033). The baffle (5034) is blocked by the top block (5043) at the center of the flow-blocking ring (5042).

8. The deep well dual-channel grouting equipment according to claim 1, characterized in that, The inner tube (5011) is fixedly connected to the front end of a first flange (5012), and the outer tube (5021) is fixedly connected to the front end of a second flange (5022). The first flange (5012) and the second flange (5022) are detachably connected.

9. The deep well dual-channel grouting equipment according to claim 1, characterized in that, The hydraulic assembly (300) includes a directional valve (303), which is connected to the hydraulic pump (302) by a check valve (306). The two oil outlets of the directional valve (303) are connected to the first piston grouting pipe (401) and the second piston grouting pipe (402) respectively, and the oil return port of the directional valve (303) is connected to the oil tank (200). An overflow valve (304) is connected to the hydraulic pump (302). The outlet of the overflow valve (304) is connected to the inlet of the cooler (305). The outlet of the cooler (305) is connected to the oil tank (200).

10. A grouting method using the deep well dual-channel grouting equipment according to any one of claims 1 to 9, characterized in that, Includes the following steps: S101: Add slurry A to the first slurry tank (403) and add slurry B to the second slurry tank (404); S102: Start the hydraulic assembly (300), the hydraulic motor (301) rotates, and the hydraulic oil in the oil tank (200) is delivered to the first piston grouting pipe (401) and the second piston grouting pipe (402) in turn, so that the first piston grouting pipe (401) and the second piston grouting pipe (402) respectively draw slurry A and slurry B from the first slurry tank (403) and the second slurry tank (404) to the slurry mixing assembly (500). S103: Slurry A is drawn into the first inlet hole (5013) and enters the cavity between the outer wall of the inner tube (5011) and the inner wall of the outer tube (5021); Slurry B is drawn into the second inlet hole (5016) and enters the inner cavity of the inner tube (5011). S104: Slurry B flows towards the rear end of the inner tube (5011) and is blocked at the wall composed of the baffle ring (5015) and the hammer (5032); Slurry A flows towards the rear end of the outer tube (5021) and is blocked at the baffle ring (5042). S105: Slurry A continues to flow and pushes the flow-blocking ring (5042) to slide toward the rear end of the outer tube (5021). At the same time, the flow-blocking ring (5042) drives the sleeve (5041) sleeved on the outer wall of the inner tube (5011) to slide, and the flow hole (5014) blocked by the sleeve (5041) gradually opens. S106: The flow passage (5014) is opened so that the cavity between the outer wall of the inner tube (5011) and the inner wall of the outer tube (5021) is connected to the inner cavity of the inner tube (5011). Slurry A flows into the inner cavity of the inner tube (5011) and mixes with slurry B. The flow-blocking hammer (503) is stuck by the telescopic stop bar (5025) and does not slide. S107: While slurry A and slurry B are being mixed, the flow-blocking sleeve (504) continues to slide toward the telescopic baffle (5025) until the top block (5043) at the center of the flow-blocking sleeve (504) pushes the telescopic baffle (5025) up and contracts, and the flow-blocking hammer (503) is not stuck and slides toward the rear end of the outer tube (5021) until the middle of the wall composed of the flow-blocking ring (5015) and the hammer head (5032) is opened up; S108: The mixture of slurry A and slurry B, after being fully mixed, flows into the rear end of the outer tube (5021) through the middle hole of the baffle ring (5015), and then flows into the slurry outlet pipe (600) through the pipe cover (505) for grouting operations in the deep well.

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