Mine automation wet mortar spraying system

Abstract

The present application relates to rock roadway surrounding rock sealing technical field, proposed mine automation wet type spouts mud system, including transportation sandstone feeding system, cement and additive feeding system and stirring pumping and spouts mud system, stirring pumping and spouts mud system provides hydraulic power and centralized control, stirring pumping and spouts mud system includes concrete mixing conveyor, concrete delivery pump, concrete paste delivery pipeline, concrete injection mechanical arm, concrete preparation hydraulic system pump station and control valve group, wherein, concrete paste delivery pipeline is by elastic delivery pipe group and two concrete delivery pipe, elastic delivery pipe group is by multiple anti-blocking delivery assembly and peristaltic delivery assembly, by above-mentioned technical scheme, solved the existing technology in long distance delivery concrete, its delivery pipeline is easy to occur accumulation and block, thereby influence construction safety and construction efficiency problem.

Description

Technical Field

[0001] This invention relates to the field of rock sealing technology for tunnels, specifically to an automated wet shotcrete system for mines. Background Technology

[0002] The mine automated wet shotcrete system is a fully automated system integrating concrete dry mix feeding, precise batching, mixing, pumping, and spraying. When shotcreting is required, depending on the different auxiliary transportation methods in the mine (trackless rubber-tired vehicles, mine car tippers, monorail cranes, etc.), matching unloading, transfer, and storage equipment is used to store the concrete dry mix (or sand and gravel mix) into the raw material storage bin. Then, through the horizontal quantitative feeding screw conveyor at the bottom of the raw material storage bin, the concrete raw materials are quantitatively supplied to the inclined feeding screw conveyor, and then transferred to the mixer. Then, a shaftless double-screw continuous mixer with positive and negative rotating blades is used to add water and mix to make concrete paste. The concrete paste is then transported to the shotcrete construction site over a long distance through the skirt valve concrete pumping system and dedicated pipelines.

[0003] Compressed air is added to the end of the delivery pipeline for wet shotcreting operations, and a shotcreting robotic arm is used to replace manual operations. It can realize machine operation, remote control or autonomous scanning control operation. According to the different moisture content of sand and gravel, it is divided into two modes: surface mixing (sand and gravel moisture content is less than 3%) and underground construction site mixing (sand and gravel moisture content is greater than 3%).

[0004] Pipeline blockage is one of the most common problems in wet shotcreting, which seriously affects construction safety and efficiency. In particular, when concrete paste is pumped over long distances, the aggregate in the paste may accumulate and cause pipeline blockage. Existing technologies generally use skirt valve concrete pumping systems for long-distance transportation. Although skirt valve pumps have certain advantages over traditional pumping methods, the risk of blockage in long-distance pipeline transportation still exists. Summary of the Invention

[0005] This invention proposes an automated wet shotcrete system for mines to solve the problem in existing technologies where concrete delivery pipelines are prone to blockages over long distances, thus affecting construction safety and efficiency.

[0006] The technical solution of the present invention is as follows:

[0007] The automated wet shotcrete system for mines includes a sand and gravel transport and feeding system, a cement and additives feeding system, and a mixing, pumping, and shotcrete system, and also includes:

[0008] The mixing, pumping and shotcreting system includes a concrete mixing conveyor, a concrete conveying pump, a concrete paste conveying pipeline, a concrete shotcreting robotic arm, a concrete preparation hydraulic system pump station and control valve group;

[0009] The discharge end of the concrete mixing conveyor is connected to the inlet of the concrete conveying pump, the discharge end of the concrete conveying pump is connected to the concrete paste conveying pipeline, and the end of the concrete paste conveying pipeline is connected to the input end of the concrete spraying robotic arm.

[0010] The concrete mixing and conveying machine mixes concrete raw materials with water to form a concrete paste. The concrete paste falls into the concrete conveying pump, is pumped by the concrete conveying pump, and is transported over a long distance to the shotcrete operation site through the concrete paste conveying pipeline. Finally, the concrete spraying robotic arm performs the shotcrete operation.

[0011] The concrete paste conveying pipeline consists of an elastic conveying pipe group and two concrete conveying pipes, with the input and output ends of the elastic conveying pipe group respectively connected to the two concrete conveying pipes.

[0012] The elastic conveying pipe assembly consists of multiple anti-clogging conveying components and peristaltic conveying components, used to clear blockages in concrete.

[0013] Furthermore, the sand and gravel transport and feeding system includes a trackless rubber-wheeled transport truck for mining, a sand and gravel mixing and storage bin, and a sand and gravel mixing quantitative feeding screw conveyor;

[0014] The trackless rubber-wheeled transport truck used for mining is used to transport sand and gravel mixtures to the vicinity of the construction site.

[0015] The sand and gravel mixture storage bin is used to receive and store the sand and gravel mixture unloaded from the trackless rubber-tired mining truck.

[0016] The feeding area of ​​the quantitative feeding screw conveyor for sand and gravel mixture is located at the bottom of the sand and gravel mixture storage bin, and is used to quantitatively supply sand and gravel mixture to the concrete mixing conveyor.

[0017] Furthermore, the cement and additive feeding system includes a cement feeding hopper and a quantitative feeding screw conveyor, and an additive feeding hopper and a quantitative feeding screw conveyor.

[0018] The cement hopper and quantitative feeding screw conveyor are used to store cement and quantitatively supply cement to the concrete mixing conveyor.

[0019] The additive feeding hopper and the quantitative feeding screw conveyor are used to store additives and quantitatively supply additives to the concrete mixing conveyor.

[0020] To clear blockages in the concrete, the anti-blockage conveying assembly includes:

[0021] The mounting frame has a flexible conveying pipe inside, and both ends of the flexible conveying pipe are connected to a first connector, which is fixedly mounted on the mounting frame.

[0022] A support bracket is fixedly installed inside the mounting frame, and the top of the support bracket abuts against the flexible conveying pipe;

[0023] A sliding bracket is slidably disposed within the mounting frame;

[0024] The adjusting mechanism is provided inside the support bracket to push the sliding bracket to move;

[0025] A support mechanism is provided on the sliding bracket to compress the flexible conveying pipe during the sliding process of the sliding bracket.

[0026] Furthermore, the adjustment mechanism includes:

[0027] The adjusting screw is rotatably disposed inside the support bracket, and an adjusting nut is threaded onto the adjusting screw, which is fixedly connected to the sliding bracket.

[0028] A drive motor is fixedly mounted on the support bracket, and the output end of the drive motor is fixedly connected to the adjusting screw.

[0029] Furthermore, the support mechanism includes:

[0030] The sliding support includes an inner sleeve and an outer sleeve. Two inner sleeves are symmetrically fixed inside the sliding support, and an outer sleeve is slidably mounted on each inner sleeve. The inner sleeves are adapted to the flexible conveying pipe.

[0031] The first driving component is fixedly installed inside each inner frame, and the output end of the first driving component is fixedly connected to the outer frame.

[0032] The connecting brackets are symmetrically and slidably arranged on each of the outer frames. A compression roller is rotatably arranged between the two connecting brackets, and a spring is fixedly arranged between the connecting brackets and the outer frame.

[0033] To further improve the concrete conveying capacity, the peristaltic conveying assembly includes:

[0034] An outer sleeve and an inner sleeve, wherein the inner sleeve is disposed inside the outer sleeve, and a gap is provided between the outer wall of the inner sleeve and the inner wall of the outer sleeve;

[0035] A fixed outer shell is sealed and fixedly installed on the outer sleeve. An abutment frame is slidably installed inside the fixed outer shell, and several inclined supports are arranged at intervals at the bottom of the abutment frame.

[0036] The abutment frame has multiple guide blocks on both sides, and the fixed housing has multiple inclined guide grooves on both sides. The multiple guide blocks correspond to the multiple guide grooves and slide in cooperation.

[0037] Furthermore, a second driving component is fixedly installed on the inner top wall of the fixed housing;

[0038] The sliding frame is slidably disposed inside the fixed housing, and the sliding frame is slidably engaged with the abutment frame. The output end of the second driving member is fixedly connected to the sliding frame.

[0039] Furthermore, the anti-blocking conveying component and the peristaltic conveying component can be replaced independently to adjust the overall length, number of components, and arrangement sequence of the elastic conveying tube assembly.

[0040] The working principle and beneficial effects of this invention are as follows:

[0041] 1. In this invention, turning on the drive motor rotates the adjusting screw, which in turn pushes the sliding bracket to move along the axis of the adjusting screw via the adjusting nut. Simultaneously, turning on the first drive component moves the outer sleeve, which slides along the surface of the inner sleeve. As the outer sleeve moves, it drives the two connecting brackets to move synchronously until the extrusion rollers contact the outer wall of the flexible conveying pipe. The outer sleeve causes the extrusion rollers to apply extrusion force to the flexible conveying pipe. The two extrusion rollers extrude force from both sides of the flexible conveying pipe, causing local deformation of the flexible conveying pipe under extrusion. The diameter of the flexible conveying pipe decreases, thereby extruding the internal concrete paste and destroying the aggregate accumulation structure inside the concrete paste, allowing it to re-enter a fluid state. This reduces the risk of pipe blockage during long-distance conveying and improves the conveying stability of concrete.

[0042] 2. In this invention, the second driving component pushes the sliding frame to slide inside the fixed housing. During the sliding process, the sliding frame pushes the abutment frame to move. Through the cooperation of the guide block and the guide groove, the abutment frame moves not only in the vertical direction but also in the horizontal direction. When the abutment frame moves downward, the inclined bracket moves with the abutment frame. The inclined bracket gradually abuts against the outer wall of the inner sleeve, thereby applying a squeezing force to the outer wall of the inner sleeve. At this time, the inner sleeve undergoes local deformation under the squeezing, and its internal diameter is reduced. The insertion direction of the inclined bracket is inclined. This inclination angle causes the squeezing point of the inclined bracket to move along the pipe axis when it pushes. When the squeezing point moves along the pipe axis, it pushes the concrete paste inside the inner sleeve forward, so that the concrete in the peristaltic conveying component is subjected to the action of peristaltic waves, thereby helping the concrete overcome the frictional resistance of the pipe wall for conveying. The blocked concrete is gradually broken up and pushed forward, thereby assisting the stable conveying of the concrete paste in long-distance pipelines.

[0043] 3. In this invention, the anti-blocking conveying component and the peristaltic conveying component can be replaced independently to adjust the overall length, number of components and arrangement sequence of the elastic conveying pipe group. This allows for flexible configuration of the number and sequence of components for different conveying distances and concrete characteristics, thereby improving the overall applicability and maintainability of the system, as well as the stability of the conveying process. Attached Figure Description

[0044] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0045] Figure 1 This is a schematic diagram of the overall planar structure of the automated wet shotcrete system for mines in this invention;

[0046] Figure 2 This is a schematic diagram of the elastic delivery pipe assembly in this invention;

[0047] Figure 3 This is a cross-sectional view of the anti-blocking conveying component in this invention.

[0048] Figure 4 This is a cross-sectional view of the anti-blocking conveying assembly from another angle in this invention;

[0049] Figure 5 This is a cross-sectional view of the sliding bracket and support mechanism in this invention.

[0050] Figure 6 This is a cross-sectional view of the support mechanism in this invention;

[0051] Figure 7 This is a cross-sectional view of the peristaltic conveying assembly in this invention;

[0052] Figure 8This is a cross-sectional view of the peristaltic conveying assembly from another angle in this invention;

[0053] Figure 9 This is a cross-sectional view of the outer sleeve, inner sleeve, fixed outer shell, and guide groove in this invention.

[0054] In the diagram: 1. Concrete mixing conveyor; 2. Concrete conveying pump; 3. Concrete paste conveying pipeline; 4. Concrete spraying robotic arm; 5. Concrete preparation hydraulic system pump station and control valve group; 6. Trackless rubber-tired mining truck; 7. Sand and gravel mixing storage bin; 8. Sand and gravel mixing quantitative feeding screw conveyor; 9. Cement feeding hopper and quantitative feeding screw conveyor; 10. Additive feeding hopper and quantitative feeding screw conveyor.

[0055] 101. Concrete delivery pipe;

[0056] 201. Mounting frame; 202. Flexible conveying pipe; 203. First connector; 204. Support bracket; 205. Sliding bracket; 206. Adjusting screw; 207. Adjusting nut; 208. Drive motor; 209. Inner sleeve; 210. Outer sleeve; 211. First driving component; 212. Connecting bracket; 213. Extrusion roller; 214. Spring;

[0057] 301. Outer sleeve; 302. Inner sleeve; 303. Fixed outer shell; 304. Abutment frame; 305. Inclined bracket; 306. Guide block; 307. Guide groove; 308. Second drive component; 309. Sliding frame. Detailed Implementation

[0058] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0059] like Figure 1As shown, this embodiment proposes an automated wet shotcrete system for mines, including a sand and gravel transport and feeding system, a cement and additive feeding system, and a mixing, pumping, and shotcrete system. The mixing, pumping, and shotcrete system provides hydraulic power and centralized control. This system includes a concrete mixing conveyor 1, a concrete conveying pump 2, a concrete paste conveying pipeline 3, a concrete spraying robotic arm 4, a concrete preparation hydraulic system pump station, and a control valve group 5. The discharge end of the concrete mixing conveyor 1 is connected to the inlet of the concrete conveying pump 2, and the discharge end of the concrete conveying pump 2 is connected to the concrete paste conveying pipeline 3. The end of the concrete paste conveying pipeline 3 is connected to the input end of the concrete spraying robotic arm 4. The sand and gravel transport and feeding system includes a mine trackless rubber-wheeled transport truck 6, a sand and gravel mixture storage bin 7, and a sand and gravel mixture quantitative feeding system. A screw conveyor 8 and a trackless rubber-wheeled mining truck 6 are used to transport sand and gravel mixtures to the vicinity of the construction site. A sand and gravel mixture storage bin 7 is used to receive and store the sand and gravel mixtures unloaded from the trackless rubber-wheeled mining truck 6. The feeding area of ​​the quantitative feeding screw conveyor 8 is located at the bottom of the sand and gravel mixture storage bin 7, used to quantitatively supply the sand and gravel mixtures to the concrete mixing conveyor 1. The cement and additive feeding system includes a cement hopper and a quantitative feeding screw conveyor 9, and an additive hopper and a quantitative feeding screw conveyor 10. The cement hopper and quantitative feeding screw conveyor 9 are used to store cement and quantitatively supply it to the concrete mixing conveyor 1. The additive hopper and quantitative feeding screw conveyor 10 are used to store additives and quantitatively supply them to the concrete mixing conveyor 1. Wherein, such as Figures 2 to 9 As shown, the concrete paste conveying pipeline 3 consists of an elastic conveying pipe assembly and two concrete conveying pipes 101. The input and output ends of the elastic conveying pipe assembly are connected to the two concrete conveying pipes 101 respectively. The elastic conveying pipe assembly consists of multiple anti-blocking conveying components and peristaltic conveying components, which are used to clear blockages in the concrete.

[0060] The concrete preparation hydraulic system pump station and control valve group 5 provide hydraulic power and centralized control for all actions.

[0061] Among them, the anti-blocking conveying component and the creeping conveying component can be replaced independently to adjust the overall length, number of components and arrangement sequence of the elastic conveying pipe group, thereby flexibly configuring the number and sequence of components for different conveying distances and concrete characteristics, and improving the stability of conveying.

[0062] During construction, the sand and gravel mixture is transported to the vicinity of the construction site by a trackless rubber-wheeled mining truck 6. After unloading, the sand and gravel mixture enters the sand and gravel mixture storage bin 7. The sand and gravel mixture quantitative feeding screw conveyor 8 at the bottom of the bin quantitatively and continuously feeds the sand and gravel mixture into the concrete mixing conveyor 1. At the same time, the cement feeding hopper and quantitative feeding screw conveyor 9 quantitatively feed cement into the concrete mixing conveyor 1. The additive feeding hopper and quantitative feeding screw conveyor 10 also synchronously feed additives into the same mixer. After the concrete mixing conveyor 1 mixes the concrete raw materials with water to make a concrete paste, the concrete paste falls into the concrete delivery pump 2. It is pumped by the concrete delivery pump 2 and transported over a long distance through the concrete paste delivery pipeline 3 to the shotcrete operation site. Finally, at the end of the concrete paste delivery pipeline 3 and the spray gun, compressed air is added to achieve the wet concrete shotcrete effect.

[0063] The concrete paste conveying pipeline 3 is divided into two parts. The majority is a regular concrete conveying pipe 101. An elastic conveying pipe assembly is connected in series in the middle of the concrete conveying pipe. The elastic conveying pipe assembly is composed of multiple anti-clogging conveying components and peristaltic conveying components. The number and arrangement of these components can be flexibly adjusted according to actual needs, such as placing them in areas prone to clogging.

[0064] When concrete paste encounters a tendency to become blocked in the pipeline, unblocking can begin. At this time, the anti-blockage conveying component starts to work, squeezing the concrete paste at the blockage point to break its accumulation structure. At the same time, the peristaltic conveying component causes the concrete in the peristaltic conveying component to be subjected to the action of peristaltic waves, which helps the concrete overcome the frictional resistance of the pipe wall and be conveyed. The blocked concrete is gradually broken up and pushed forward, thus assisting the conveying of concrete.

[0065] like Figures 3 to 6 As shown, the anti-blocking conveying assembly includes an installation frame 201, a support bracket 204, a sliding bracket 205, an adjustment mechanism, and a support mechanism. A flexible conveying pipe 202 is installed inside the installation frame 201, with first connectors 203 connected to both ends of the flexible conveying pipe 202. The first connectors 203 are fixedly mounted on the installation frame 201. The support bracket 204 is fixedly mounted inside the installation frame 201, with its top abutting against the flexible conveying pipe 202. A sliding bracket 205 is slidably mounted inside the installation frame 201. An adjustment mechanism is installed inside the support bracket 204 to push the sliding bracket 205 to move. A support mechanism is installed on the sliding bracket 205 to compress the flexible conveying pipe 202 during the sliding process of the sliding bracket 205.

[0066] When clearing a blocked pipe, the adjustment mechanism is activated, which drives the sliding support 205 to move in the direction of concrete conveying. At this time, the extrusion roller 213, driven by the sliding support 205, presses against the outer wall of the flexible conveying pipe 202. As the sliding support 205 moves continuously, the adjustment mechanism can apply extrusion force to the flexible conveying pipe 202. Under the extrusion force, the flexible conveying pipe 202 undergoes local deformation, and the internal diameter of the flexible conveying pipe 202 becomes smaller. This local deformation will squeeze the concrete paste inside the pipe, thereby destroying the aggregate accumulation structure inside the concrete paste and causing it to re-enter a flowing state.

[0067] The adjusting mechanism includes an adjusting screw 206 and a drive motor 208, such as Figure 4 As shown, an adjusting screw 206 is rotatably installed inside the support bracket 204, and an adjusting nut 207 is threaded on the adjusting screw 206. The adjusting nut 207 is fixedly connected to the sliding bracket 205. A drive motor 208 is fixedly installed on the support bracket 204, and the output end of the drive motor 208 is fixedly connected to the adjusting screw 206.

[0068] When the drive motor 208 is turned on, it drives the adjusting screw 206 to rotate. The adjusting screw 206 rotates inside the support bracket 204. Through the threaded engagement between the adjusting nut 207 and the adjusting screw 206, the adjusting nut 207 can push the sliding bracket 205 to move along the axis of the adjusting screw 206. The direction of movement of the sliding bracket 205 depends on the rotation direction of the adjusting screw 206. By controlling the forward and reverse rotation of the drive motor 208, the forward or backward movement of the sliding bracket 205 can be achieved.

[0069] The support mechanism includes an inner frame 209, an outer frame 210, a first drive component 211, and a connecting bracket 212, such as Figure 5 , Figure 6 As shown, two inner sleeves 209 are symmetrically fixed inside the sliding bracket 205. An outer sleeve 210 is slidably mounted on each inner sleeve 209. The inner sleeves 209 are adapted to the flexible conveying pipe 202. A first driving member 211 is fixedly mounted inside each inner sleeve 209. The output end of the first driving member 211 is fixedly connected to the outer sleeve 210. Two connecting brackets 212 are symmetrically and slidably mounted on each outer sleeve 210. A pressing roller 213 is rotatably mounted between the two connecting brackets 212. A spring 214 is fixedly mounted between the connecting brackets 212 and the outer sleeve 210.

[0070] When it is necessary to unclog the blocked pipeline, the first drive unit 211 is activated to push the outer sleeve 210 to move. The outer sleeve 210 slides along the surface of the inner sleeve 209. As the outer sleeve 210 moves, it drives the two connecting supports 212 to move synchronously, thereby pushing the extrusion roller 213 forward until the extrusion roller 213 contacts the outer wall of the flexible conveying pipe 202. The outer sleeve 210 will cause the extrusion roller 213 to apply extrusion force to the flexible conveying pipe 202. Under the extrusion, the flexible conveying pipe 202 will undergo local deformation, and the diameter of the flexible conveying pipe 202 will decrease, thereby extruding the internal concrete paste. The two inner sleeves 209 are symmetrically arranged inside the sliding support 205, so that the two extrusion rollers 213 extrude the flexible conveying pipe 202 from both sides.

[0071] With the spring 214 in place, when encountering irregular hard particles in the concrete that are blocking the flexible conveying pipe 202, the position of the extrusion roller 213 can be adjusted automatically to ensure that the extrusion roller 213 always fits against the outer wall of the flexible conveying pipe 202.

[0072] The peristaltic conveying assembly includes an outer sleeve 301, an inner sleeve 302, and a fixed housing 303, such as Figures 7 to 9 As shown, an inner sleeve 302 is provided inside the outer sleeve 301. A gap is provided between the outer wall of the inner sleeve 302 and the inner wall of the outer sleeve 301. A fixed outer shell 303 is sealed and fixedly provided on the outer sleeve 301. An abutment frame 304 is slidably provided inside the fixed outer shell 303. Several inclined supports 305 are arranged at intervals at the bottom of the abutment frame 304. Several guide blocks 306 are provided on both sides of the abutment frame 304. Several inclined guide grooves 307 are opened on both sides inside the fixed outer shell 303. The multiple guide blocks 306 correspond one-to-one with the multiple guide grooves 307 and slide in cooperation. It also includes a second driving member 308 and a sliding frame 309. The second driving member 308 is fixedly provided on the inner top wall of the fixed outer shell 303. The sliding frame 309 is slidably provided inside the fixed outer shell 303. The sliding frame 309 slides in cooperation with the abutment frame 304. The output end of the second driving member 308 is fixedly connected to the sliding frame 309.

[0073] The second driving component 308 is activated, pushing the sliding frame 309 to slide inside the fixed housing 303. During the sliding process, the sliding frame 309 pushes the abutment frame 304 to move. Since guide blocks 306 are provided on both sides of the abutment frame 304, and inclined guide grooves 307 are provided on both sides inside the fixed housing 303, the guide blocks 306 are engaged in the guide grooves 307 and slide along the guide grooves 307. Because the guide grooves 307 are inclined, the abutment frame 304 moves not only vertically but also horizontally during movement. As the direction moves, the sliding frame 309 and the abutment frame 304 slide relative to each other. When the abutment frame 304 moves downward, these inclined supports 305 move together with the abutment frame 304. The inclined supports 305 gradually abut against the outer wall of the inner sleeve 302, thereby applying a compressive force to the outer wall of the inner sleeve 302. At this time, the inner sleeve 302 undergoes local deformation under compression, and its internal diameter shrinks. Since multiple inclined supports 305 are arranged at intervals along the bottom of the abutment frame 304, the inner sleeve 302 will deform in multiple positions in sequence.

[0074] The inclined support 305 is inserted at an angle, which causes the pressing point of the inclined support 305 on the inner sleeve 302 to move along the tube axis when it is pushed. As the pressing point moves along the tube axis, it pushes the concrete paste inside the inner sleeve 302 forward. Multiple inclined supports 305 operate in sequence, forming a continuous creeping wave to continuously push the concrete paste.

[0075] After the second driving component 308 stops operating, the sliding frame 309 retracts, the abutment frame 304 returns to its original position under the action of gravity or the return spring 214, the tilting bracket 305 disengages from the outer wall of the inner sleeve 302, and the inner sleeve 302 restores its original shape by its own elasticity.

[0076] The working principle or usage process of this automated wet shotcrete system in the mine is as follows:

[0077] During construction, the sand and gravel mixture is transported to the vicinity of the construction site by a trackless rubber-wheeled mining truck 6. After unloading, the sand and gravel mixture enters the sand and gravel mixture storage bin 7. The sand and gravel mixture quantitative feeding screw conveyor 8 at the bottom of the bin quantitatively and continuously feeds the sand and gravel mixture into the concrete mixing conveyor 1. At the same time, the cement feeding hopper and quantitative feeding screw conveyor 9 quantitatively feed cement into the concrete mixing conveyor 1. The additive feeding hopper and quantitative feeding screw conveyor 10 also synchronously feed additives into the same mixer. After the concrete mixing conveyor 1 mixes the concrete raw materials with water to make a concrete paste, the concrete paste falls into the concrete delivery pump 2. It is pumped by the concrete delivery pump 2 and transported over a long distance through the concrete paste delivery pipeline 3 to the shotcrete operation site. Finally, at the end of the concrete paste delivery pipeline 3 and the spray gun, compressed air is added to achieve the wet concrete shotcrete effect.

[0078] When the concrete paste shows signs of clogging in the pipeline, unblocking can begin. At this time, the drive motor 208 is activated, rotating the adjusting screw 206. The adjusting screw 206 rotates inside the support bracket 204. Through the threaded engagement between the adjusting nut 207 and the adjusting screw 206, the adjusting nut 207 pushes the sliding bracket 205 to move along the axis of the adjusting screw 206. Simultaneously, the first drive component 211 is activated, pushing the outer sleeve 210 to move. The outer sleeve 210 slides along the surface of the inner sleeve 209. As the outer sleeve 210 moves... The two connecting brackets 212 can move synchronously, thereby pushing the extrusion rollers 213 forward until the extrusion rollers 213 contact the outer wall of the flexible conveying pipe 202. The outer bracket 210 will cause the extrusion rollers 213 to apply extrusion force to the flexible conveying pipe 202. The two extrusion rollers 213 extrude force from both sides of the flexible conveying pipe 202. Under the extrusion, the flexible conveying pipe 202 undergoes local deformation, and the diameter of the flexible conveying pipe 202 is reduced, thereby extruding the internal concrete paste, thereby destroying the aggregate accumulation structure inside the concrete paste and causing it to re-enter the flow state.

[0079] During the conveying of the blocked concrete, the second drive unit 308 is activated to push the sliding frame 309 to slide inside the fixed housing 303. As the sliding frame 309 slides, it pushes the abutment frame 304 to move. Simultaneously, through the cooperation of the guide block 306 and the guide groove 307, the abutment frame 304 moves not only vertically but also horizontally. At this time, the sliding frame 309 and the abutment frame 304 slide relative to each other. When the abutment frame 304 moves downwards, the inclined supports 305 move along with it. The inclined supports 305 gradually abut against the outer wall of the inner sleeve 302, thereby applying a compressive force to the outer wall of the inner sleeve 302. Under this compressive force, the inner sleeve 302 experiences localized compression. The deformation causes the internal diameter to shrink. As multiple inclined supports 305 are spaced apart along the bottom of the abutment frame 304, the inner sleeve 302 will deform sequentially at multiple positions. Since the insertion direction of the inclined supports 305 is inclined, this inclination angle causes the squeezing point of the inner sleeve 302 to move along the pipe axis when the inclined supports 305 are pushed. When the squeezing point moves along the pipe axis, it will push the concrete paste inside the inner sleeve 302 forward. The multiple inclined supports 305 act sequentially, so that the concrete in the peristaltic conveying component is subjected to the action of peristaltic waves, which helps the concrete overcome the frictional resistance of the pipe wall and be conveyed. The blocked concrete is gradually broken up and pushed forward, thereby assisting the conveying of concrete.

[0080] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An automated wet shotcrete system for mines, comprising a sand and gravel transport and feeding system, a cement and additive feeding system, and a mixing, pumping, and shotcrete system, characterized in that, Also includes: The mixing, pumping and spraying system includes a concrete mixing conveyor (1), a concrete conveying pump (2), a concrete paste conveying pipeline (3), a concrete spraying robotic arm (4), a concrete preparation hydraulic system pump station and control valve group (5). The discharge end of the concrete mixing conveyor (1) is connected to the inlet of the concrete conveying pump (2), the discharge port of the concrete conveying pump (2) is connected to the concrete paste conveying pipeline (3), and the end of the concrete paste conveying pipeline (3) is connected to the input end of the concrete spraying robot arm (4). The concrete paste conveying pipeline (3) consists of an elastic conveying pipe group and two concrete conveying pipes (101), and the input end and output end of the elastic conveying pipe group are respectively connected to the two concrete conveying pipes (101). The elastic conveying pipe assembly consists of multiple anti-clogging conveying components and peristaltic conveying components, used to clear blockages in concrete.

2. The automated wet shotcrete system for mines according to claim 1, characterized in that, The sand and gravel transport and feeding system includes a trackless rubber-tired transport truck (6), a sand and gravel mixing storage bin (7), and a sand and gravel mixing quantitative feeding screw conveyor (8). The trackless rubber-tired mining truck (6) is used to transport sand and gravel mixture to the vicinity of the construction site; The sand and gravel mixture storage bin (7) is used to receive and store the sand and gravel mixture unloaded from the trackless rubber-tired transport truck (6) of the mine; The feeding area of ​​the quantitative feeding screw conveyor (8) for sand and gravel mixture is located at the bottom of the sand and gravel mixture storage box (7) and is used to quantitatively supply sand and gravel mixture to the concrete mixing conveyor (1).

3. The automated wet shotcrete system for mines according to claim 1, characterized in that, The cement and additive feeding system includes a cement feeding hopper and a quantitative feeding screw conveyor (9), and an additive feeding hopper and a quantitative feeding screw conveyor (10). The cement hopper and quantitative feeding screw conveyor (9) are used to store cement and quantitatively supply cement to the concrete mixing conveyor (1). The additive feeding hopper and quantitative feeding screw conveyor (10) are used to store additives and quantitatively supply additives to the concrete mixing conveyor (1).

4. The automated wet shotcrete system for mines according to claim 1, characterized in that, The anti-blocking conveying assembly includes: The mounting frame (201) has a flexible conveying pipe (202) inside, and both ends of the flexible conveying pipe (202) are connected to a first connector (203), which is fixedly mounted on the mounting frame (201). A support bracket (204) is fixedly installed inside the mounting frame (201), and the top of the support bracket (204) abuts against the flexible conveying pipe (202); Sliding bracket (205), the sliding bracket (205) is slidably disposed within the mounting frame (201); The adjusting mechanism is provided inside the support bracket (204) for pushing the sliding bracket (205) to move; A support mechanism is provided on the sliding bracket (205) for squeezing the flexible conveying pipe (202) during the sliding process of the sliding bracket (205).

5. The automated wet shotcrete system for mines according to claim 4, characterized in that, The adjustment mechanism includes: The adjusting screw (206) is rotatably disposed inside the support bracket (204), and the adjusting nut (207) is threaded on the adjusting screw (206). The adjusting nut (207) is fixedly connected to the sliding bracket (205). A drive motor (208) is fixedly mounted on the support bracket (204), and the output end of the drive motor (208) is fixedly connected to the adjusting screw (206).

6. The automated wet shotcrete system for mines according to claim 4, characterized in that, The supporting structure includes: The inner sleeve (209) and the outer sleeve (210) are symmetrically fixed inside the sliding bracket (205). The outer sleeve (210) is slidably arranged on each inner sleeve (209). The inner sleeve (209) is adapted to the flexible conveying pipe (202). The first driving component (211) is fixedly installed inside each inner sleeve (209), and the output end of the first driving component (211) is fixedly connected to the outer sleeve (210); The connecting bracket (212) is symmetrically and slidably arranged on each of the outer brackets (210). A pressing roller (213) is rotatably arranged between the two connecting brackets (212). A spring (214) is fixedly arranged between the connecting bracket (212) and the outer bracket (210).

7. The automated wet shotcrete system for mines according to claim 6, characterized in that, The peristaltic delivery assembly includes: The outer sleeve (301) and the inner sleeve (302) are provided inside the outer sleeve (301), and a gap is provided between the outer wall of the inner sleeve (302) and the inner wall of the outer sleeve (301); A fixed outer shell (303) is sealed and fixed on the outer sleeve (301). An abutment frame (304) is slidably arranged inside the fixed outer shell (303). Several inclined supports (305) are arranged at intervals at the bottom of the abutment frame (304).

8. The automated wet shotcrete system for mines according to claim 7, characterized in that, Multiple guide blocks (306) are provided on both sides of the abutment frame (304), and multiple inclined guide grooves (307) are provided on both sides inside the fixed shell (303). The multiple guide blocks (306) correspond one-to-one with the multiple guide grooves (307) and slide in cooperation.

9. The automated wet shotcrete system for mines according to claim 8, characterized in that, A second driving component (308) is fixedly installed on the inner top wall of the fixed housing (303). The sliding frame (309) is slidably disposed inside the fixed housing (303). The sliding frame (309) is slidably engaged with the abutment frame (304). The output end of the second driving member (308) is fixedly connected to the sliding frame (309).

10. The automated wet shotcrete system for mines according to claim 9, characterized in that, The anti-blocking conveying component and the peristaltic conveying component can be replaced independently to adjust the overall length, number of components, and arrangement sequence of the elastic conveying tube assembly.

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