System and method for preparing concrete for roadway

Abstract

The invention belongs to the technical field of concrete preparation, and particularly relates to a roadway concrete preparation system and method.The roadway concrete preparation system comprises a feeding distribution bin, a feeding belt conveyor, a scraper conveyor and a storage bin, the feeding belt conveyor is arranged between the feeding distribution bin and the scraper conveyor, the scraper conveyor is arranged above the storage bin, and a plurality of opening and closing mechanisms are arranged on the scraper conveyor; blanking at different point positions is realized; the quantitative adding device is used for quantitatively adding an additive; a cement bucket elevator and a cement feeding device; the stirrer and the concrete buffer hopper are arranged on the stirrer support, the material taking belt conveyor is connected with the storage bin and the stirrer, the cement bucket elevator is connected with the cement feeding device and the stirrer, and the concrete buffer hopper is arranged below the stirrer. Concrete is prepared in a roadway and directly pumped and sprayed, the proportion of raw materials for preparing the concrete is guaranteed, and continuous preparation of the concrete is achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of concrete preparation, and in particular relates to a system and method for preparing concrete for a tunnel. Background Art

[0002] During the tunnel construction process, the concrete wet spraying process is usually used to support the tunnel. Due to the small size of the tunnel, the current tunnel concrete preparation adopts simple mechanization to prepare concrete, which has a lot of dust, low efficiency, uneven proportions of various concrete bulk materials, and cannot guarantee the stability of concrete quality. It is also difficult to carry out large-scale continuous preparation, so long-distance pumping and spraying cannot be achieved. Summary of the invention

[0003] The present invention aims to solve the problem that the existing concrete preparation device has a small space in the tunnel, has low efficiency, and is difficult to achieve large-scale continuous preparation, and thus is difficult to achieve long-distance pumping and spraying of concrete. A concrete preparation system and method for tunnels are provided. Concrete raw materials are stored and concrete is prepared by devices arranged along the length direction of the tunnel, so that the prepared concrete can be directly transported and sprayed by the pumping system, and the prepared concrete is stored and utilized by the concrete buffer bucket, so that concrete pumping and spraying and concrete preparation by a mixer can be carried out simultaneously, thereby achieving continuous preparation of concrete.

[0004] In order to achieve the above object, the technical solution of the present invention is: A concrete preparation system for a tunnel is arranged in the tunnel, and comprises a loading and diverting bin, a loading belt conveyor, a scraper conveyor and a storage bin. The loading and diverting bin is arranged above the feeding end of the loading belt conveyor, and the discharging end of the loading belt conveyor extends to above the feeding end of the scraper conveyor. The scraper conveyor is arranged above multiple storage bins, and multiple opening and closing mechanisms are arranged on the scraper conveyor to realize material unloading at different points. The opening and closing mechanisms on the scraper conveyor ensure that multiple storage bins are evenly connected to the materials.

[0005] The system also includes a quantitative adding device and a reclaiming belt conveyor. The feeding end of the reclaiming belt conveyor is arranged below the storage bin, and the quantitative adding device is arranged above the reclaiming belt conveyor to achieve quantitative addition of additives. The additives are used to prevent the concrete from solidifying during pumping after preparation.

[0006] The system also includes a cement bucket elevator and a cement feeding device. The feed port of the cement bucket elevator is arranged below the cement feeding device. The cement feeding device cooperates with the cement bucket elevator to transport a certain amount of cement to the mixer.

[0007] The system also includes a mixer, a mixer support and a concrete buffer bucket. The mixer support is provided with the mixer and the concrete buffer bucket. The discharging ends of the feeding belt conveyor and the cement bucket elevator are both located above the mixer feed port. The concrete buffer bucket is arranged below the mixer and is used for temporarily storing concrete prepared by the mixer. Concrete is prepared by the mixer and falls into the concrete buffer bucket after preparation.

[0008] Preferably, each of the storage bins and cement feeding devices is provided with a weighing sensor for monitoring the weight change of the materials therein to ensure the proportion of different raw materials during concrete preparation.

[0009] Preferably, the opening and closing mechanism includes an opening and closing plate and a handle, a plurality of discharge holes are provided at the lower end of the scraper along its conveying direction, the discharge holes include a plurality of concentrically arranged fan-shaped openings, a plurality of opening and closing plates are rotatably provided at the lower end of the scraper, the opening and closing plates correspond to the discharge holes one by one, and the opening and closing plates are provided with through holes corresponding to the fan-shaped openings, a handle is fixedly provided on the outside of the opening and closing plate, the outer ends of the handle extend out from both sides of the scraper, and the corresponding opening and closing plates are rolled together to open or close the corresponding discharge holes, so that the conveyed materials fall into the corresponding storage bin.

[0010] Preferably, the quantitative adding device comprises an adding bracket, an additive silo, a pulling hopper and a control cylinder, the adding bracket is fixedly provided with an additive silo, the lower end of the additive silo is fixedly provided with a first cylinder, the side plate of the first cylinder is communicated with the additive silo discharge port, the first cylinder is slidably provided with a pulling hopper, the adding bracket is fixedly provided with a control cylinder, the output end of the control cylinder is fixedly connected with the pulling hopper, the pulling hopper comprises a second cylinder and a baffle plate, the upper end of the second cylinder is fixedly provided with a baffle plate away from the control cylinder, the baffle plate is in sliding contact with the top surface of the first cylinder interior, the side plate of the second cylinder close to the control cylinder is threaded with a screw, the screw extends into the second cylinder and is fixed with a vertical plate, both ends of the vertical plate extend out of the second cylinder and are fixedly connected with a horizontal plate, the horizontal plate extends in the direction close to the control cylinder, and the second cylinder is driven to slide to achieve the quantitative fall of the additive on the material taking belt conveyor.

[0011] Preferably, the cement feeding device includes a cement feeding hopper, a cement feeding vertical screw machine, a cement feeding horizontal screw machine, a cement feeding screw machine and a cement silo. The cement feeding vertical screw machine is fixedly arranged on one side of the cement silo, and the lower end of the cement feeding vertical screw machine is connected to and fixedly provided with a cement feeding hopper. A cement feeding platform is arranged on one side of the cement silo, and the cement feeding platform is arranged below the cement feeding hopper. The upper and lower ends of the cement silo are respectively fixedly provided with a cement feeding horizontal screw machine and a cement feeding screw machine along their length directions. The feeding end of the cement feeding horizontal screw machine is connected to the discharging end of the cement feeding vertical screw machine, and a plurality of discharging ports are arranged at the lower end. The upper end of the cement feeding screw machine is connected to the cement silo, and the discharging port of the cement feeding screw machine is located above the feeding port of the cement bucket elevator, and the cement is ensured to fall evenly into the cement silo through the plurality of discharging ports.

[0012] Preferably, the concrete buffer hopper includes a hopper, a column, a door cylinder and a door. The hopper is fixedly arranged on the mixer bracket and corresponds to the mixer discharge port. A door cylinder is fixedly arranged on one side of the hopper through the column. The output end of the door cylinder is connected to the door, which is used to drive the door to open or close to realize the hopper discharge port. The door is driven to open and close by the door cylinder and the degree of opening and closing can be adjusted.

[0013] Preferably, a water inlet pipe is provided on the mixer bracket, and a water flow meter is provided on the water inlet pipe to achieve quantitative water addition to the mixer, and the flow rate of water added to the mixer is adjusted by the water flow meter.

[0014] A method for preparing concrete for a roadway, which is implemented by the above concrete preparation system, comprises the following steps: Step 1: Load and unload the sand and stone mixture into the feeding and diversion bin, and transport it to the scraper through the feeding belt conveyor. Turn the handles in turn to open the feeding holes of the scraper, and complete the feeding of multiple storage bins respectively. The materials in the storage bins are weighed by the weighing sensors corresponding to the storage bins. Step 2: The bagged cement is loaded and unloaded into the cement loading hopper through the cement loading platform, transported to the cement loading horizontal screw conveyor through the cement loading vertical screw conveyor, and evenly falls into the cement silo through multiple discharge ports to complete the cement silo loading, and the cement material therein is weighed by the weighing sensor corresponding to the cement loading device; Step 3: Open the door of the storage bin, transport the sand and stone mixture dropped from the storage bin to the mixer through the feeding belt conveyor, and add additives to the sand and stone mixture transported by the feeding belt conveyor through the quantitative adding device, monitor the weight of the sand and stone mixture in the storage bin through the weighing sensor, and close the door of the storage bin after the transported sand and stone mixture meets the needs of concrete preparation.

[0015] Step 4: The cement in the cement silo is transported to the cement bucket elevator through the cement feeding screw, and then transported to the mixer through the cement bucket elevator. The weight of the cement is monitored by the weighing sensor corresponding to the cement silo. When the transported cement meets the demand for preparing concrete, the cement feeding screw stops transporting cement. Step 5: The water inlet pipe uses a water flow meter to add the quantitative water required for preparing concrete into the mixer, and the mixer is used to prepare concrete. After the concrete preparation is completed, the material door of the mixer discharge port is opened, and all the concrete prepared in the mixer falls into the hopper and is transported and utilized through the pumping system. At the same time, the material door of the mixer discharge port is closed, and the next concrete preparation work can be carried out directly.

[0016] Preferably, in step one and step four, the door of the loading and diversion bin, the door of the storage bin, and the discharge port door of the mixer are all connected to a cylinder to achieve opening and closing and opening and closing degree adjustment, thereby ensuring control and adjustment of the opening and closing of different bin doors.

[0017] Preferably, in step 4, the feed inlets of the cement bucket elevator and the mixer are both provided with dust suppression covers to prevent dust from being generated.

[0018] Through the above technical solution, the beneficial effects of the present invention are: 1. The present invention ensures the raw material ratio and concrete preparation effect during concrete preparation by weighing the sand, stone raw materials, cement, etc. in the concrete preparation process and quantitatively transporting water through a water flow meter.

[0019] 2. The present invention reasonably distributes the layout of various equipment in the concrete preparation system, so that concrete preparation can be completed in the tunnel, and the efficiency and effect of concrete preparation are guaranteed, thereby effectively improving the concrete spraying support efficiency of the tunnel.

[0020] 3. The present invention realizes multi-point unloading of the scraper by opening unloading holes on the scraper in conjunction with an opening and closing mechanism, thereby realizing the unloading needs of the same scraper for multiple storage bins and ensuring that the materials are evenly distributed in the storage bins.

[0021] 4. The present invention monitors the weight changes of the storage bin and the cement bin through weighing sensors, and closes the bin doors when the unloading weight meets the requirements, thereby ensuring the raw material ratio during concrete preparation.

[0022] 5. The present invention realizes quantitative feeding of additives by driving the draw-out hopper to slide in the first cylinder, and the concrete brick rotates the screw to adjust the single feeding amount of the additives.

[0023] 6. The present invention realizes the loading of bagged cement by cooperating with the cement loading hopper, the cement loading vertical screw machine and the cement loading horizontal screw machine. It has a simple structure and is easy to operate. In addition, multiple discharge ports opened on the cement loading horizontal screw machine ensure that the cement evenly falls into the cement silo, making full use of the space in the cement silo.

[0024] 7. The present invention arranges a concrete buffer bucket under the mixer to store the prepared concrete. When the concrete in the concrete buffer bucket is used for spraying, the mixer can prepare concrete again to ensure continuous preparation of concrete, thereby ensuring smooth and continuous concrete spraying support work in the tunnel.

[0025] 8. The present invention provides dust suppression covers at the feed port of the mixer, the feed port of the cement bucket elevator, etc. to prevent dust materials from scattering, thereby ensuring the working environment in the tunnel on the one hand and avoiding waste on the other. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of the present invention.

[0027] Figure 2 It is a structural schematic diagram of the opening and closing mechanism of the present invention when opening the feed hole.

[0028] Figure 3 It is a structural schematic diagram of the opening and closing mechanism of the present invention when closing the feed hole.

[0029] Figure 4 It is a structural schematic diagram of the opening and closing mechanism of the present invention.

[0030] Figure 5 It is a schematic diagram of the structure of the quantitative addition device of the present invention.

[0031] Figure 6 It is a structural schematic diagram of the pull-out hopper of the present invention.

[0032] Figure 7 It is a structural schematic diagram of the cement feeding device of the present invention.

[0033] Figure 8 It is a structural schematic diagram of the concrete buffer bucket of the present invention.

[0034] The reference numerals in the accompanying drawings are: 1 is a feeding diversion bin, 2 is a feeding belt conveyor, 3 is a scraper conveyor, 31 is an opening and closing plate, 32 is a handle, and 33 is a feeding hole; 4 is a storage bin, 5 is a quantitative adding device, 51 is an adding bracket, 52 is an additive bin, 53 is a pull-out hopper, 531 is a second cylinder, 532 is a baffle plate, 533 is a screw, 534 is a vertical plate, 535 is a horizontal plate, 54 is a control cylinder, and 55 is a first cylinder; 6 is a reclaiming belt conveyor, 7 is a mixer, 8 is a cement bucket elevator, 9 is a cement feeding device, 91 is a cement feeding hopper, 92 is a cement feeding vertical screw machine, 93 is a cement feeding horizontal screw machine, 931 is a discharge port, 94 is a cement reclaiming screw machine, and 95 is a cement silo; 10 is a cement loading platform, 11 is a mixer support, 12 is a concrete buffer hopper, 121 is a hopper, 122 is a column, 123 is a warehouse door cylinder, and 124 is a warehouse door. DETAILED DESCRIPTION

[0035] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments: like Figures 1 to 8 As shown, the present embodiment provides a concrete preparation system for a tunnel, which is arranged in the tunnel and includes a loading and diverting bin 1, a loading belt conveyor 2, a scraper 3 and a storage bin 4. The loading and diverting bin 1 is arranged above the feeding end of the loading belt conveyor 2. A loader or other equipment is used to load and unload the sand and stone mixture into the loading and diverting bin 1. The bin door at the lower end of the loading and diverting bin 1 is opened to allow the sand and stone mixture to fall onto the loading belt conveyor 2. The discharging end of the loading belt conveyor 2 extends above the feeding end of the scraper 3. The loading belt conveyor 2 transports the sand and stone mixture thereon to the scraper 3. The scraper 3 is arranged above a plurality of storage bins 4. A plurality of opening and closing mechanisms are provided on the scraper 3 to realize unloading at different points. Different storage bins 4 are loaded in turn by the scraper 3, so that the storage bin 4 is evenly filled with the sand and stone mixture.

[0036] It should be noted that in the tunnel, due to height restrictions, the height of the storage bin 4 cannot be lowered in order to ensure the capacity of the storage bin 4. Therefore, the storage bin 4 is loaded by the loading belt conveyor 2 and the scraper conveyor 3 to adapt to the narrow and long environment of the tunnel.

[0037] The system also includes a quantitative adding device 5 and a reclaiming belt conveyor 6. The feeding end of the reclaiming belt conveyor 6 is arranged below the storage bin 4, and is used to transport the sand and stone mixture dropped from the storage bin 4. The quantitative adding device 5 is arranged above the reclaiming belt conveyor 6, and is used to achieve quantitative addition of additives. The additive is a retarder, which is used to improve the pumping performance of concrete, reduce pumping resistance, slow down the solidification time, and avoid the prepared concrete from solidifying during the transportation process before spraying.

[0038] The feeding belt conveyor 2 and the reclaiming belt conveyor 6 both include a horizontal section and an inclined section. The horizontal section receives the material, and the inclined section lifts and conveys the material to the upper feeding points of the scraper conveyor 3 and the mixer 7, respectively.

[0039] The system further comprises a cement bucket elevator 8 and a cement feeding device 9. The feed port of the cement bucket elevator 8 is arranged below the cement feeding device 9, and the cement in the cement feeding device 9 is transported by the cement bucket elevator 8.

[0040] The system also includes a mixer 7, a mixer support 11 and a concrete buffer bucket 12. The mixer support 11 is provided with the mixer 7 and the concrete buffer bucket 12. The discharging ends of the reclaiming belt conveyor 6 and the cement bucket elevator 8 are both located above the feed port of the mixer 7. The mixer support 11 is provided with a water inlet pipe, which is connected to a water tank. A water flow meter is provided on the water inlet pipe to achieve quantitative water addition to the mixer 7. The mixer adds water to the sand, stone mixture and cement to form concrete. The concrete buffer bucket 12 is arranged below the mixer 7 for temporarily storing the concrete prepared by the mixer 7. A feeding device of a concrete pumping system is arranged below the concrete buffer bucket 12, so that the concrete is pumped and sprayed out to achieve tunnel support.

[0041] Each of the storage bin 4 and cement feeding device 9 is provided with a weighing sensor for monitoring the weight change of the material therein. The weighing sensor can adopt a mining intrinsically safe weighing sensor with model GZD20. The weighing sensor is used to weigh the weight of the storage bin 4 or the cement feeding device 9, so as to monitor the weight of the material dropped and transported away, and effectively ensure the raw material ratio for concrete preparation.

[0042] like Figures 2 to 4 As shown, the opening and closing mechanism includes an opening and closing plate 31 and a handle 32. The lower end of the scraper 3 is provided with a plurality of discharge holes 33 along its conveying direction. The discharge holes 33 include a plurality of concentrically arranged fan-shaped openings. Each discharge hole 33 corresponds to two fan-shaped openings. The lower end of the scraper 3 is rotatably provided with a plurality of opening and closing plates 31. The opening and closing plates 31 correspond to the discharge holes 33 one by one, and the opening and closing plates 31 are provided with perforations corresponding to the fan-shaped openings. When the perforations correspond to the fan-shaped openings, as shown in FIG. Figure 2 As shown, the material conveyed by the scraper 3 passes through the fan-shaped opening and the perforation and falls into the corresponding storage bin 4 below. When the perforation and the fan-shaped opening are staggered, as shown in FIG. Figure 3 As shown, the material continues to be transported backwards, and a handle 32 is fixedly provided on the outer side of the opening and closing plate 31 . The outer ends of the handle 32 extend out of both sides of the scraper 3 . The opening and closing plate 31 can be conveniently rotated by holding the handle 32 .

[0043] As an implementable embodiment, the opening and closing plate 31 can be driven to rotate by electric or hydraulic power.

[0044] The quantitative adding device 5 comprises an adding bracket 51, an additive silo 52, a pulling hopper 53 and a control cylinder 54. The additive silo 52 is fixedly arranged at the upper end of the adding bracket 51, and a first cylinder 55 is fixedly arranged at the outlet of the additive silo 52 at the lower end. Figure 5-6 As shown, the first cylinder 55 is a cylinder structure that is through from left to right (the left and right directions are Figure 5 and Figure 6 In the left and right directions), the side plate of the first cylinder 55 is connected to the discharge port of the additive silo 52, and a pull-out hopper 53 is slidably arranged in the first cylinder 55. When the upper opening of the pull-out hopper 53 corresponds to the discharge port of the additive silo 52, the additive in the additive silo 52 falls into the pull-out hopper 53, filling the pull-out hopper 53 to achieve quantitative addition, and then when the pull-out hopper 53 is pulled out of the first cylinder 55, the quantitative additive therein falls on the feeding belt conveyor 6 below, and a control cylinder 54 is fixedly arranged on the adding bracket 51, and the output end of the control cylinder 54 is fixedly connected to the pull-out hopper 53, and the pull-out hopper 53 is driven to slide in the first cylinder 55 by the control cylinder 54.

[0045] The draw hopper 53 includes a second cylinder 531 and a baffle plate 532. Figure 5-6 As shown, the second cylinder 531 is a cylinder structure that is connected vertically (the vertical direction is Figure 5 and Figure 6 The baffle plate 532 is fixedly arranged on the side of the upper end of the second cylinder 531 away from the control cylinder 54, and the baffle plate 532 is in sliding contact with the inner top surface of the first cylinder 55. A reinforcing rib plate is fixedly connected between the baffle plate 532 and the second cylinder 531 to ensure that the baffle plate 532 is in contact with the inner top surface of the second cylinder 55. When the second cylinder 531 is staggered from the discharge port of the additive bin 52, the baffle plate 532 blocks the discharge port of the additive bin 52 to prevent the additive from falling into the first cylinder 5 5, a screw 533 is threadedly penetrated on the side plate of the second cylinder 531 close to the control cylinder 54, and the screw 533 extends into the second cylinder 531 to fix a vertical plate 534, and both ends of the vertical plate 534 extend out of the second cylinder 531 and are fixedly connected to a horizontal plate 535, and the horizontal plate 535 extends in the direction close to the control cylinder 54. By rotating the screw 533, the vertical plate 534 moves in the second cylinder 531 along the extension direction of the first cylinder 55, thereby adjusting the effective capacity of the second cylinder 531 to accommodate the additive.

[0046] The cement feeding device 9 includes a cement feeding hopper 91, a cement feeding vertical screw machine 92, a cement feeding horizontal screw machine 93, a cement material taking screw machine 94 and a cement silo 95. The cement feeding vertical screw machine 92 is fixedly arranged on one side of the cement silo 95. The feed port at the lower end of the cement feeding vertical screw machine 92 is connected and fixedly arranged with the cement feeding hopper 91. A cement feeding platform 10 is arranged on one side of the cement silo 95. Bags of cement or pallets loaded with cement transported by forklifts are moved above the cement feeding platform 10, and then workers stand on the cement feeding platform 10 to pour cement materials into the cement feeding hopper 91. As the cement feeding vertical screw machine 92 is transported upward, the cement feeding platform 10 is arranged below the cement feeding hopper 91, and the upper end of the cement silo 95 is connected to the cement feeding hopper 91. A cement feeding horizontal screw machine 93 and a cement taking screw machine 94 are fixedly arranged along the length direction at the lower end respectively. The feeding end of the cement feeding horizontal screw machine 93 is connected to the discharging end of the cement feeding vertical screw machine 92, and a plurality of discharge ports 931 are arranged at the lower end. The cement feeding vertical screw machine 92 transports cement to the cement feeding horizontal screw machine 93, and along with the transportation of the cement feeding horizontal screw machine 93, the cement material falls from the plurality of discharge ports 931 and evenly fills the cement silo 95. The upper end of the cement taking screw machine 94 is connected to the cement silo 95, and the discharge port of the cement taking screw machine 94 is located above the feeding port of the cement bucket elevator 8. When concrete preparation is required, the cement taking screw machine 94 is started to transport the cement material in the cement silo 95 to the cement bucket elevator 8.

[0047] It should be noted that, due to the narrow working environment of the alley, in order to ensure the capacity of the cement silo 95, when the height and width of the cement silo 95 cannot be increased, the cement silo 95 has a narrow and long structure. Therefore, when loading materials into the cement silo 95, multiple unloading ports 931 can be provided to prevent the cement materials from forming a pile in the cement silo 95, resulting in the inability to fully utilize the storage space in the cement silo 95.

[0048] The concrete buffer hopper 12 includes a hopper 121, a column 122, a gate cylinder 123 and a gate 124. The hopper 121 is fixedly arranged on the mixer bracket 11 and corresponds to the discharge port of the mixer 7. After the concrete in the mixer 7 is prepared, the gate of the discharge port of the mixer 7 is opened, and the prepared concrete falls into the hopper 121. Then, the gate of the discharge port of the mixer 7 can be closed to prepare concrete again, thereby ensuring the continuity of the concrete preparation work. A gate cylinder 123 is fixedly arranged on one side of the hopper 121 through the column 122. The output end of the gate cylinder 123 is connected to the gate 124, which is used to drive the gate 124 to open or close the discharge port of the hopper 121. The gate 124 of the discharge port of the hopper 121 is driven to move by the gate cylinder 123 to adjust the opening degree of the discharge port of the hopper 121, so that the material therein falls into the pumping system, and is pumped and sprayed for tunnel support.

[0049] A method for preparing concrete for a roadway, which is implemented by the above concrete preparation system, comprises the following steps: Step 1: Load and unload the sand and stone mixture into the loading and diversion bin 1, and transport it to the scraper 3 through the loading belt conveyor 2, turn the handle 32 in turn to open the unloading hole 33 of the scraper 3, complete the loading of multiple storage bins 4, and weigh the materials therein through the weighing sensor corresponding to the storage bin 4.

[0050] The external concrete preparation raw materials, such as sand, stone mixture or other raw materials, are loaded and unloaded into the loading and diversion bin 1 by a loader or other transportation equipment, and different discharge holes 33 are opened by turning the corresponding handle 32, so that the transported concrete raw materials fall into the storage bin 4 below through the discharge holes 33, and the concrete raw materials of multiple storage bins 4 are loaded in sequence to ensure that the storage bin 4 is evenly filled with concrete raw materials.

[0051] Step 2: The bagged cement is loaded and unloaded into the cement loading hopper 91 through the cement loading platform 10, transported to the cement loading horizontal screw machine 93 through the cement loading vertical screw machine 92, and evenly falls into the cement silo 95 through multiple discharge ports 931, completing the loading of the cement silo 95, and weighing the cement material therein through the weighing sensor corresponding to the cement feeding device 9.

[0052] Bags of cement or pallets loaded with cement transported by forklifts are moved to the top of the cement loading platform 10 , and then workers standing on the cement loading platform 10 pour the cement material into the cement loading hopper 91 .

[0053] Step 3: Open the door of the storage bin 4, transport the sand and stone mixture dropped from the storage bin 4 to the mixer 7 through the feeding belt conveyor 6, and quantitatively add additives to the sand and stone mixture transported by the feeding belt conveyor 6 through the quantitative adding device 5, monitor the weight of the sand and stone mixture in the storage bin 6 through the weighing sensor, and close the door of the storage bin 4 after the transported sand and stone mixture meets the demand for preparing concrete.

[0054] In the process that the concrete raw materials in the storage bin 4 fall onto the feeding belt conveyor 6 and are transported to the mixer 7, the weighing sensor corresponding to the storage bin 4 monitors the weight change of the storage bin 4 in real time. When the weight of the concrete raw materials falling in the storage bin 4 reaches the weight required for preparing concrete once, the storage bin 4 door is closed and the storage bin 4 stops unloading.

[0055] Step 4: The cement in the cement silo 95 is transported to the cement bucket elevator 8 through the cement feeding screw 94, and then transported to the mixer 7 through the cement bucket elevator 8. The weight of the cement is monitored by the weighing sensor corresponding to the cement silo 95. When the transported cement meets the demand for preparing concrete, the cement feeding screw 94 stops transporting cement.

[0056] During the process of conveying cement to the mixer 7, the weighing sensor corresponding to the cement silo 95 monitors the weight change of the cement silo 95 in real time. When the weight of the cement material conveyed from the cement silo 95 reaches the weight required for preparing concrete once, the cement feeding screw machine 94 is closed and the conveying of cement material is stopped.

[0057] Step 5: The water inlet pipe uses a water flow meter to add a certain amount of water required for preparing concrete into the mixer 7, and the mixer 7 is used to prepare concrete. After the concrete preparation is completed, the material door of the mixer 7 is opened, and all the concrete prepared in the mixer 7 falls into the hopper 121 and is transported and utilized through the pumping system. At the same time, the material door of the mixer 7 is closed, and the next concrete preparation work can be directly carried out.

[0058] The water flow rate pumped from the water tank to the mixer 7 is regulated by a water flow meter to ensure the ratio of raw materials and water required for concrete preparation. The prepared concrete falls into the hopper 121, and the hopper door 124 at the lower discharge port of the hopper 121 is driven to open by the hopper door cylinder 123. At this time, the concrete falls into the pumping system for transportation and spraying for tunnel support. The discharge port of the second mixer 7 is closed for the next concrete preparation.

[0059] In step one and step four, the door of the loading and diversion bin, the door of the storage bin, and the discharge port door of the mixer are all connected to cylinders to achieve opening and closing and opening and closing degree adjustment, which is convenient for adjusting the opening and closing of the discharge port doors of different bins.

[0060] In the step 4, the feed ports of the cement bucket elevator 8 and the mixer 7 are both provided with dust suppression covers, so as to avoid dust and waste.

[0061] It should be noted that the present invention also includes a control console, which uses a mining explosion-proof and intrinsically safe control console of model TJ127 (A) to control the above operations, adjust the opening and closing of the lower door of the feeding diversion bin 1, the storage bin 4, the mixer 7, the cement bin 95 and the concrete buffer bucket 12, adjust the feeding belt conveyor 2, the reclaiming belt conveyor 6, the mixer 7, the cement bucket elevator 8, the cement feeding vertical screw machine 92, the cement feeding horizontal screw machine 93, the cement reclaiming screw machine 94, and the start and stop of the pumping system, and make corresponding operations on the feedback data of the weighing sensor according to the set parameters.

[0062] The embodiments described above are only preferred embodiments of the present invention and are not intended to limit the scope of implementation of the present invention. Therefore, any equivalent changes or modifications made according to the structures, features and principles described in the patent scope of the present invention should be included in the scope of the patent application of the present invention.

Claims

1. A concrete preparation system for a roadway, arranged in a roadway, characterized in that: The invention comprises a feeding diversion bin (1), a feeding belt conveyor (2), a scraper conveyor (3) and a storage bin (4), wherein the feeding diversion bin (1) is arranged above the feeding end of the feeding belt conveyor (2), the discharging end of the feeding belt conveyor (2) extends above the feeding end of the scraper conveyor (3), the scraper conveyor (3) is arranged above a plurality of storage bins (4), and a plurality of opening and closing mechanisms are arranged on the scraper conveyor (3) to realize unloading of materials at different points; The system further comprises a quantitative adding device (5) and a reclaiming belt conveyor (6), wherein the feeding end of the reclaiming belt conveyor (6) is arranged below the storage bin (4), and the quantitative adding device (5) is arranged above the reclaiming belt conveyor (6) for realizing quantitative adding of additives; The system further comprises a cement bucket elevator (8) and a cement feeding device (9), wherein a feed port of the cement bucket elevator (8) is arranged below the cement feeding device (9); The system further comprises a mixer (7), a mixer support (11) and a concrete buffer hopper (12); the mixer support (11) is provided with the mixer (7) and the concrete buffer hopper (12); the discharge ends of the reclaiming belt conveyor (6) and the cement bucket elevator (8) are both located above the feed inlet of the mixer (7); the concrete buffer hopper (12) is arranged below the mixer (7) and is used for temporarily storing concrete prepared by the mixer (7).

2. A tunnel concrete preparation system according to claim 1, characterized in that: Each of the storage bins (4) and cement feeding devices (9) is provided with a weighing sensor for monitoring weight changes of the materials therein.

3. A tunnel concrete preparation system according to claim 1, characterized in that: The opening and closing mechanism comprises an opening and closing plate (31) and a handle (32); a plurality of material discharge holes (33) are provided at the lower end of the scraper (3) along its conveying direction; the material discharge holes (33) comprise a plurality of concentrically arranged fan-shaped openings; a plurality of opening and closing plates (31) are rotatably provided at the lower end of the scraper (3); the opening and closing plates (31) correspond to the material discharge holes (33) one by one, and the opening and closing plates (31) are provided with through holes corresponding to the fan-shaped openings; a handle (32) is fixedly provided on the outer side of the opening and closing plate (31); the outer ends of the handle (32) extend out of both sides of the scraper (3).

4. A tunnel concrete preparation system according to claim 1, characterized in that: The quantitative adding device (5) comprises an adding bracket (51), an additive silo (52), a pull-out hopper (53) and a control cylinder (54); the additive silo (52) is fixedly arranged at the upper end of the adding bracket (51); a first cylinder (55) is fixedly arranged at the outlet of the lower end of the additive silo (52); a side plate of the first cylinder (55) is connected to the outlet of the additive silo (52); a pull-out hopper (53) is slidably arranged in the first cylinder (55); a control cylinder (54) is fixedly arranged on the adding bracket (51); and an output end of the control cylinder (54) is fixedly connected to the pull-out hopper (53); The pulling hopper (53) comprises a second cylinder (531) and a material baffle plate (532); the material baffle plate (532) is fixedly arranged on the upper end of the second cylinder (531) away from the control cylinder (54); the material baffle plate (532) is in sliding contact with the inner top surface of the first cylinder (55); a screw (533) is threadedly penetrated on the side plate of the second cylinder (531) close to the control cylinder (54); the screw (533) extends into the second cylinder (531) and is fixed with a vertical plate (534); both ends of the vertical plate (534) extend out of the second cylinder (531) and are fixedly connected with a horizontal plate (535); the horizontal plate (535) extends in a direction close to the control cylinder (54).

5. A tunnel concrete preparation system according to claim 1, characterized in that: The cement feeding device (9) comprises a cement feeding hopper (91), a cement feeding vertical screw machine (92), a cement feeding horizontal screw machine (93), a cement feeding screw machine (94) and a cement silo (95). The cement feeding vertical screw machine (92) is fixedly arranged on one side of the cement silo (95). The lower end feed port of the cement feeding vertical screw machine (92) is connected to and fixedly arranged with the cement feeding hopper (91). A cement feeding platform (10) is arranged on one side of the cement silo (95). The cement feeding platform (10) is provided with a Below the cement loading hopper (91), a cement loading horizontal screw machine (93) and a cement taking screw machine (94) are fixedly arranged at the upper and lower ends of the cement silo (95) along the length direction thereof, respectively; the feeding end of the cement loading horizontal screw machine (93) is connected to the discharging end of the cement loading vertical screw machine (92), and a plurality of discharge ports (931) are arranged at the lower end; the upper end of the cement taking screw machine (94) is connected to the cement silo (95), and the discharging port of the cement taking screw machine (94) is located above the feeding port of the cement bucket elevator (8).

6. A tunnel concrete preparation system according to claim 1, characterized in that: The concrete buffer hopper (12) comprises a hopper (121), a column (122), a door cylinder (123) and a door (124); the hopper (121) is fixedly arranged on a mixer support (11) and corresponds to a material discharge port of the mixer (7); a door cylinder (123) is fixedly arranged on one side of the hopper (121) via the column (122); an output end of the door cylinder (123) is connected to the door (124) and is used to drive the door (124) to open or close the material discharge port of the hopper (121).

7. A tunnel concrete preparation system according to claim 1, characterized in that: The mixer support (11) is provided with a water inlet pipe, and a water flow meter is provided on the water inlet pipe to achieve quantitative water addition to the mixer (7).

8. A method for preparing concrete for a roadway, which is implemented by the system for preparing concrete for a roadway according to any one of claims 1 to 7, characterized in that: The following steps are involved: Step 1: loading and unloading the sand and stone mixture into the loading and diversion bin (1), and conveying it to the scraper (3) through the loading belt conveyor (2), turning the handle (32) in turn to open the unloading hole (33) of the scraper (3), completing the loading of multiple storage bins (4) respectively, and weighing the materials in the storage bins (4) through the weighing sensors corresponding to the storage bins (4); Step 2: bagged cement is loaded and unloaded into the cement loading hopper (91) through the cement loading platform (10), transported to the cement loading horizontal screw machine (93) through the cement loading vertical screw machine (92), and evenly falls into the cement silo (95) through multiple discharge ports (931), completing the loading of the cement silo (95), and weighing the cement material therein through a weighing sensor corresponding to the cement loading device (9); Step 3: Open the door of the storage bin (4), convey the sand and stone mixture dropped from the storage bin (4) to the mixer (7) via the feeding belt conveyor (6), quantitatively add additives to the sand and stone mixture conveyed by the feeding belt conveyor (6) via the quantitative adding device (5), monitor the weight of the sand and stone mixture in the storage bin (6) via the weighing sensor, and close the door of the storage bin (4) after the conveyed sand and stone mixture meets the demand for preparing concrete; Step 4: The cement in the cement silo (95) is transported to the cement bucket elevator (8) through the cement feeding screw (94), and then transported to the mixer (7) through the cement bucket elevator (8). The weight of the cement is monitored by a weighing sensor corresponding to the cement silo (95). When the transported cement meets the demand for preparing concrete, the cement feeding screw (94) stops transporting the cement. Step 5: The water inlet pipe is used to add a certain amount of water required for preparing concrete into the mixer (7) through a water flow meter, and concrete is prepared by the mixer (7). After the concrete preparation is completed, the material door of the mixer (7) is opened, and all the concrete prepared in the mixer (7) falls into the hopper (121) and is transported and utilized by the pumping system. At the same time, the material door of the mixer (7) is closed, and the next concrete preparation work can be directly carried out.

9. A method for preparing tunnel concrete according to claim 8, characterized in that: In the steps 1 and 4, the door of the loading and diversion bin, the door of the storage bin, and the discharge port door of the mixer are all connected with cylinders to achieve opening and closing and opening and closing degree adjustment.

10. A method for preparing tunnel concrete according to claim 8, characterized in that: In the step 4, the feed inlets of the cement bucket elevator (8) and the mixer (7) are both provided with dust suppression covers.

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