Automatic gunite dry material supply system for mining

Abstract

Disclosed is an automatic gunite dry material supply system for mining. The system comprises automatic output carriages (100), a tractor-semitrailer (200) for transporting the automatic output carriages, a mining narrow-rail flatbed trailer (300), a monorail crane and carriage body guide rails (400). Each automatic output carriage comprises a main carriage body (101), a bottom plate (102), a horizontal screw conveyor (103) and a vertical screw conveyor (104). The cooperation of the automatic output carriages, the tractor-semitrailer, the mining narrow-rail flatbed trailer, the monorail crane and the carriage body guide rails can satisfy special conditions of each transportation stage of vertical shaft mines, and transport in a sealed state a gunite dry material from a ground production base to a downhole operation position. After being connected to a downhole hydraulic power pack (106) and apparatuses, the system continuously and quantitatively supply a gunite material according to the requirements of downstream apparatuses. A weighing system (700) monitors the weight of raw materials in the carriages in real time; on the basis of same and a gunite area, calculates the thickness of a gunite layer; and adjusts the output amount and the guniting speed of the automatic output carriages according to needs, so as to ensure that the thickness of the gunite layer satisfies design requirements.

Description

An automatic dry material supply system for mine spraying Technical Field

[0001] The invention relates to the technical field of underground mine shotcrete material supply and construction, in particular to an automatic mine-used shotcrete dry material supply system. Background Art

[0002] Shotcrete construction in vertical shaft mines is an important part of anchor beam mesh and cable shotcrete support during excavation. Its purpose is to effectively limit the free development of surrounding rock deformation, adjust the stress distribution of surrounding rock, and prevent the loosening and falling of rock caused by weathering and crack evolution of surrounding rock.

[0003] According to the mine excavation working face operating procedures, the shotcrete mix ratio (cement: sand: gravel is 1:2:2) is 5% of the cement. The cement grade (cement) should be no less than 32.5, the fine aggregate should be medium-coarse sand with a fineness modulus greater than 2.5, and the coarse aggregate should be melon seed flakes with a particle size of 5-13mm. The process flow is as follows: cement, sand, fine gravel, and accelerator are transported by truck to the material department of each coal mine for storage. The sand and gravel are mixed at the batching station and loaded into mine cars. Bags of cement and bagged accelerator are loaded separately into mine cars and towed to the wellhead by narrow-gauge electric locomotives. They are then transported underground into a cage and then to the working face yard by narrow-gauge electric locomotives. The materials are then hoisted to the front of the working face (the front line) by monorail and manually unloaded to the surface. The aggregate (sand and fine gravel) and bagged cement are manually mixed and homogenized before the shotcrete machine is started. Two people use shovels to drop the mixture into the shotcrete hopper, while another scrapes the sieve, cleans the bulk material, and adds accelerator. The mixture is then transported by compressed air to the spray nozzle, where it is mixed with water in the mixing chamber. Another person holds the nozzle and sprays the concrete onto the rock face of the roadway, where it solidifies and forms a support structure.

[0004] Although these are inherent habits and patterns formed in long-term work, there are several problems in checking project quality and analyzing the actual construction status and construction process on site.

[0005] 1. Spraying construction requires the cooperation of multiple people, with high labor intensity, large dust and harsh working environment.

[0006] 2. Serious material spillage: Yellow sand and fine stone are piled up separately when entering the site, then mixed at the batching station and put into the mine car, and then cleared out of the mine car after arriving at the working surface. Aggregate and cement are mixed into a mixture on the ground and piled up, and then manually thrown into the shotcrete hopper with a shovel. The whole process is very spilled.

[0007] 3. Insufficient homogenization with cementitious materials (cement): Aggregates (yellow sand, fine stone) and cement are manually mixed underground. The working surface is narrow, the space is closed, and the dust is large, causing vision and breathing obstructions. Often, during the actual mixing process, the material is simply turned over and then shoveled directly into the hopper of the shotcrete machine. The hardening of concrete requires that the cementitious material fully wraps the aggregate and gradually hardens into cement stone. Therefore, the perfect homogenization of aggregate and cement is the basis of concrete strength.

[0008] 4. Insufficient homogenization with the accelerator: The accelerator is manually added to the hopper. Since the person adding the accelerator also has to scrape the sieve and clean the hopper, uniform addition is not achieved. In addition, when the sprayer is conveying the mixture, only the mixture of a certain cross-sectional area (pipe diameter) collides with each other to achieve homogenization, which fails to achieve quantitative batching.

[0009] 5. Insufficient homogenization with cement results in an increase in rebound material during the spraying process, causing waste.

[0010] 6. Excessive addition of accelerators can severely reduce concrete strength. According to construction specifications, 5% of the cement used in shotcrete is added to the accelerator. The main components of the accelerator are sodium aluminate and sodium carbonate, which react rapidly with the gypsum in the cement in an alkaline solution to form sodium sulfate, causing the gypsum to lose its original retarding effect. This causes the calcium aluminate minerals to rapidly hydrate and release their hydration product crystals into the solution, causing the concrete to set rapidly. This catalyst acts as a catalyst for the cement. Adding 5% accelerator to the cement can cause a 20%-30% loss in the concrete's later strength, and this loss increases with increasing addition. In actual construction, to prevent concrete from slipping during top spraying, workers often increase the amount of accelerator, resulting in particularly poor quality at the tunnel top.

[0011] Summary of the Invention

[0012] In order to solve the above technical problems, the technical solution provided by the present invention is as follows: an automatic spraying dry material supply system for mining, comprising an automatic output carriage and a traction semi-trailer for transporting the automatic output carriage, a narrow-gauge flatbed truck for mining, a monorail crane, and a carriage guide rail, which can transport the homogenized spraying dry material to the underground construction site in a sealed state and continuously supply raw materials according to the needs of downstream equipment; the automatic output carriage comprises a main carriage, a bottom plate, a horizontal screw feeder, and a vertical screw feeder; the carriage guide rail is arranged under the underground single-hanging rail, the carriage guide rail comprises base channel steels arranged at intervals, and rails are detachably connected to both sides of the base channel steel, and a pallet is detachably placed on the rail, the middle part of the pallet is connected to a movable connection device by a hydraulic piston push rod so that the pallet can slide on the rail, the bottom of the pallet is provided with a wheel assembly in contact with the rail, and the top is provided with a weighing system;

[0013] A compartment discharge port is provided on the top of the main compartment, and a compartment gate is provided on the bottom. The four corners of the main compartment are connected to the bottom plate through brackets and the bottom support of the warehouse. The compartment discharge port is connected to the feeding end of the horizontal screw feeder through a discharge gate, and the discharging end of the horizontal screw feeder is connected to the feeding end at the bottom of the vertical screw feeder through a movable short pipe.

[0014] The four corners of the bottom plate are respectively provided with latch assemblies corresponding to tractor trailers, narrow-gauge flatbed trucks for mining, and pallets. The tractor trailers, narrow-gauge flatbed trucks for mining, and pallets are provided with lock cylinders corresponding to the latch assemblies. The latch assembly includes a square lock frame for inserting the lock cylinder. The square lock frame and lock cylinder are respectively provided with a first and a second insertion hole. A latch is provided on one side of the square lock frame for inserting into the first and second insertion holes. The latch is mounted on a latch support block via a latch collar. A latch handle is provided on the top of the latch to prevent the latch from returning to its original position against a latch limit block. A four-cornered cone is provided on the top of the lock cylinder, and a washer is provided at the bottom of the lock cylinder.

[0015] The advantages of the present invention over the prior art are: the automatic mine spraying dry material supply system of the present application can meet the transportation conditions of each stage unique to vertical shaft mines through the cooperation of the automatic output carriage with the traction semi-trailer, the mine narrow-gauge flatbed truck, the monorail crane, and the carriage guide rail, and can transport the spraying dry material from the production base to the underground construction site in a sealed state; the horizontal screw and the vertical screw in the automatic output carriage are equipped with hydraulic motors, and after reaching the working position, the hydraulic joints are connected to continuously and quantitatively transport the raw materials in the carriage according to the requirements of downstream equipment; the entire process eliminates ground batching and manual unloading underground, manual mixing underground, and manual feeding underground, reduces spillage, reduces labor intensity, and eliminates dust, which can improve the quality of spraying concrete projects and promote the mechanization and automation development of coal mines. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] FIG1 is a schematic diagram of the top structure of an automatic output carriage in an automatic dry material supply system for mine spraying according to the present invention.

[0017] FIG2 is a schematic diagram of the front end structure of an automatic output carriage in an automatic dry material supply system for mine spraying according to the present invention.

[0018] FIG3 is a schematic diagram of the side structure of an automatic output carriage in an automatic dry material supply system for mine spraying according to the present invention.

[0019] FIG4 is a schematic diagram of the AA cross-sectional structure of an automatic output carriage in an automatic dry material supply system for mine spraying according to the present invention.

[0020] FIG5 is a schematic structural diagram of a vertical screw feeder pushing a hydraulic cylinder in an automatic dry material spraying supply system for mining according to the present invention.

[0021] FIG6 is a schematic diagram of the connection structure of a horizontal screw feeder and a vertical screw feeder in an automatic dry material supply system for mine spraying according to the present invention.

[0022] FIG7 is a schematic structural diagram of a vertical spiral support and a movable carriage support in an automatic spraying dry material supply system for mining according to the present invention.

[0023] FIG8 is a schematic structural diagram of a spindle-shaped lifting lug in an automatic spraying dry material supply system for mining according to the present invention.

[0024] FIG9 is a schematic structural diagram of a discharge port sealing door in an automatic spraying dry material supply system for mining according to the present invention.

[0025] FIG10 is a schematic diagram of the bottom structure of a discharge port sealing door in an automatic spraying dry material supply system for mining according to the present invention.

[0026] FIG11 is a schematic diagram of the side structure of a sealing door of a discharge port in an automatic spraying dry material supply system for mining according to the present invention.

[0027] FIG12 is a schematic diagram showing the position structure of a latch assembly in an automatic spraying dry material supply system for mining according to the present invention.

[0028] FIG13 is a structural diagram of a discharge port in an automatic dry material supply system for mine spraying according to the present invention.

[0029] FIG14 is a schematic structural diagram of a latch assembly in an automatic spraying dry material supply system for mining according to the present invention.

[0030] FIG15 is a schematic diagram of the side structure of a square locking frame in an automatic spraying dry material supply system for mining according to the present invention.

[0031] FIG16 is a schematic diagram of the installation structure of a discharge port sealing cover in an automatic spraying dry material supply system for mining according to the present invention.

[0032] FIG17 is a schematic diagram of the side structure of a discharge port sealing cover in an automatic spraying dry material supply system for mining according to the present invention.

[0033] FIG18 is a schematic structural diagram of a traction semi-trailer in an automatic dry material supply system for mine spraying according to the present invention.

[0034] FIG19 is a schematic structural diagram of a locking column in an automatic dry material supply system for mine spraying according to the present invention.

[0035] FIG20 is a schematic diagram of the top structure of a traction semi-trailer in an automatic spraying dry material supply system for mining according to the present invention.

[0036] FIG21 is a schematic structural diagram of the loading state of a tractor semi-trailer in an automatic mine-use spraying dry material supply system according to the present invention.

[0037] Figure 22 is a schematic structural diagram of a narrow-gauge flatbed truck for mining in an automatic mine-use spraying dry material supply system according to the present invention.

[0038] Figure 23 is a schematic diagram of the top structure of a narrow-gauge flatbed truck for mining in an automatic mine-use spraying dry material supply system of the present invention.

[0039] Figure 24 is a schematic structural diagram of the loading state of a narrow-gauge flatbed truck for mining in an automatic mine-used spraying dry material supply system of the present invention.

[0040] Figure 25 is a schematic structural diagram of the carriage guide rail in an automatic mine-use shotcrete dry material supply system of the present invention.

[0041] Figure 26 is a structural schematic diagram of a tray in an automatic spraying dry material supply system for mining according to the present invention.

[0042] Figure 27 is a schematic structural diagram of the base channel steel and track in an automatic mine spraying dry material supply system of the present invention.

[0043] Figure 28 is a schematic structural diagram of the track in an automatic spraying dry material supply system for mining according to the present invention.

[0044] Figure 29 is a schematic structural diagram of a track connecting pipe in an automatic spraying dry material supply system for mining according to the present invention.

[0045] Figure 30 is a schematic diagram of the side structure of the track in an automatic mine spraying dry material supply system of the present invention.

[0046] Figure 31 is a structural diagram of the base channel steel in an automatic spraying dry material supply system for mining according to the present invention.

[0047] Figure 32 is a schematic diagram of the connection structure between the base channel steel and the track in an automatic spraying dry material supply system for mining according to the present invention.

[0048] Figure 33 is a structural schematic diagram of the wheel assembly in an automatic spraying dry material supply system for mining according to the present invention.

[0049] Figure 34 is a schematic diagram of the internal structure of the wheel assembly in an automatic spraying dry material supply system for mining according to the present invention.

[0050] Figure 35 is a structural schematic diagram of a movable connection device in an automatic mine spraying dry material supply system of the present invention.

[0051] Figure 36 is a structural diagram of a weighing system in an automatic spraying dry material supply system for mining according to the present invention.

[0052] Figure 37 is a schematic diagram of the connection structure of a weighing system in an automatic spraying dry material supply system for mining according to the present invention.

[0053] Figure 38 is a schematic diagram of the connection structure between the tray and the weighing system in an automatic spraying dry material supply system for mining according to the present invention.

[0054] Figure 39 is a structural schematic diagram of the hydraulic power pack in an automatic mine-used dry material spraying supply system of the present invention.

[0055] Figure 40 is a structural schematic diagram of an oil pipe storage barrel in an automatic mine spraying dry material supply system of the present invention. DETAILED DESCRIPTION

[0056] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0057] In the description of the embodiments of the present invention, it should be noted that if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the product of the invention is usually placed when in use. It is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, it should not be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description and should not be understood as indicating or implying relative importance.

[0058] Furthermore, the use of terms such as "horizontal," "vertical," and "overhanging" does not necessarily imply that the component must be absolutely horizontal or overhanging, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," not that the structure must be completely horizontal, but rather that it can be slightly tilted.

[0059] In the description of the embodiments of the present invention, "a plurality of" means at least two.

[0060] In the description of the embodiments of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0061] Example:

[0062] 1-40 , this embodiment discloses an automatic dry material supply system for mine-used shotcrete, including an automatic output carriage 100, a tractor semi-trailer 200 for transporting the automatic output carriage 100, a narrow-gauge flatbed truck 300 for mining, a monorail crane, and a carriage guide rail 400. The automatic output carriage 100 includes a main body 101, a bottom plate 102, a horizontal screw feeder 103, and a vertical screw feeder 104.

[0063] The main compartment 101 is provided with a compartment discharge port 107 at the top and a compartment gate at the bottom. Two ox-shuttle-shaped lifting ears 119 are provided at the top of the main compartment 101, and a lifting hole 120 is provided on the ox-shuttle-shaped lifting ears 119; the four corners of the main compartment 101 are connected to the bottom plate 102 through brackets 108 and the bottom support 109, and the compartment discharge port 107 is connected to the feeding end of the horizontal screw feeder 103 through the discharge gate 110. The bottom of the main compartment 101 is an inverted cone bottom, and a pressure plate 112 is provided at the compartment gate; the discharge end of the horizontal screw feeder 103 It is connected to the feeding end at the bottom of the vertical screw conveyor 104 through a movable short pipe 111; the horizontal screw conveyor 103 and the vertical screw conveyor 104 are respectively driven by a hydraulic motor 105, and the hydraulic motor 105 is connected to a hydraulic power pack 106. The hydraulic power pack 106 includes a distribution box, a motor 106a connected to the distribution box, a hydraulic oil tank 106b connected to the motor 106a, a hydraulic oil pump and a solenoid valve 106c connected to the hydraulic oil tank 106b. The hydraulic power pack 106 is also provided with several oil pipe storage barrels 106d.

[0064] A discharge port sealing door 118 is provided at the discharge port 107 of the compartment. The discharge port sealing door 118 includes a steel plate 118a, a rubber lining 118b covering the bottom of the steel plate 118a, and a thickened steel plate 118c arranged at the top center of the steel plate 118a. The outer edge of the rubber lining 118b is provided with several circles of toothed grooves 118d. A Y-shaped pressure rod 118e is pressed on the top of the steel plate 118a. The two ends of the Y-shaped pressure rod 118e are respectively fixed to the connecting ear 118g on the top of the main compartment 101 by a fixing pin 118f. The center of the Y-shaped pressure rod 118e is against the top of the thickened steel plate 118c through a tightening bolt 118h, and a tightening handle 118j is provided on the top of the tightening bolt 118h.

[0065] A vertical screw discharge port 113 is provided at the top of the vertical screw conveyor 104. A push plate 114 is fixed to the side of the vertical screw conveyor 104 away from the main body 101. A pushing hydraulic cylinder 115 is provided between the push plate 114 and the outer wall of the main body 101. One end of the pushing hydraulic cylinder 115 is hinged to the push plate 114 through a vertical screw support 116, and the other end is hinged to the main body 101 through a movable body support 117.

[0066] The outer end of the vertical spiral discharge port 113 is sleeved with a discharge port sealing cover 121, and the discharge port sealing cover 121 is detachably connected to the vertical spiral discharge port 113 through the cooperation of internal and external threads. A rubber corrugated seal 122 and a clamp 123 are arranged between the discharge port sealing cover 121 and the outer wall of the vertical spiral feeder 104; a power assist handle 124 is arranged on the outside of the discharge port sealing cover 121.

[0067] At the four corners of the bottom of the base plate 102 are respectively provided with latch assemblies 500 corresponding to the tractor trailer 200 and the narrow-gauge flatbed truck 300. The tractor trailer 200 and the narrow-gauge flatbed truck 300 are also provided with lock cylinders 600 corresponding to the latch assemblies 500. The latch assembly 500 includes a square lock frame 501 for inserting the lock cylinder 600. The square lock frame 501 and the lock cylinder 600 are respectively provided with a first insertion hole 502 and a second insertion hole 601. A latch 503 is provided on the outer side of the square lock frame 501 for inserting into the first insertion hole 502 and the second insertion hole 601. The latch 503 is mounted on a latch support block 505 via a latch collar 504. A latch handle 506 is provided on the upper portion of the latch 503, which rests against a latch limit block 507 to prevent the latch from returning to its original position. A square cone 602 is provided on the top of the lock cylinder 600, and a washer 603 is provided at the bottom of the lock cylinder 600.

[0068] The carriage guide rail 400 is set under the single hanging rail in the well. The carriage guide rail 400 includes base channel steels 401 arranged at intervals. The base channel steels 401 are detachably connected to rails 402 on both sides. A pallet 403 can be detachably placed on the rails 402. Lock cylinders 600 corresponding to the latch assembly 500 are also set at the four corners of the upper part of the pallet 403. The middle part of the pallet 403 is connected to the movable connection device 408 through a hydraulic piston push rod 404 so that the pallet 403 can slide on the rail 402. A wheel assembly 405 in contact with the rail 402 is set at the bottom of the pallet 403, and a weighing system 700 is set on the top.

[0069] Connecting pipes 406 corresponding to the base channel steel 401 are provided outwardly on both sides of the track 402, and a bolt hole 1 406a is provided on the connecting pipe 406. A placement groove 401a corresponding to the track 402 and a bolt hole 2 401b corresponding to the bolt hole 1 406a are provided on the base channel steel 401. The track 402 is detachably connected to the base rod 401 by bolts; the wheel assembly 405 includes a wheel bracket 405a connected to the bottom of the tray 403, and a plurality of H-shaped groove wheels 405b are provided in the wheel bracket 405a. A square steel 407 is set at the center of the track 402, and the bottom of the tray 403 is slidably set on the square steel 407. The bottom of the tray 403 is also provided with a movable connection device 408 connected to the hydraulic piston push rod 404. The movable connection device 408 includes a top plate 408a connected to the top of the tray 403, and the lower part of the top plate 408a is provided with side plates 408b located on both sides of the hydraulic piston push rod 404. The side plates 408b are connected to the hydraulic piston push rod 404 through connecting pins 408c.

[0070] The weighing system 700 includes a weighing panel 701 placed on top of the pallet 403. The bottom of the weighing panel 701 is fixed to the pallet 403 via a weighing base plate 702. Four explosion-proof weighing sensors 703 are installed between the bottom of the weighing panel 701 and the pallet 403. The weighing panel 701 is fixed to the pallet 403 via positioning bolts 704.

[0071] The automatic dry material supply system for mine spraying in this embodiment consists of an automatic output carriage and rotating parts for each stage of transportation. The size and weight of the automatic output carriage must meet the size and load characteristics of the underground mine cage, and the height must meet the height requirements of the monorail crane.

[0072] In this embodiment, two discharge ports are provided on the top of the automatic output carriage. After the materials are discharged, the discharge port sealing door is pressed, and the clamping handle of the discharge port sealing door is rotated so that the steel plate of the discharge port sealing door and the rubber lining with grooves are pressed tightly against the discharge port of the carriage. This ensures that the automatic output carriage will not be infiltrated with water or affected by moisture in the well, thereby extending the warranty period of the shotcrete material to the greatest extent.

[0073] A screw conveyor is installed horizontally throughout the length of the carriage, and a vertical screw conveyor is installed vertically at the front end. The bottom of the vertical screw conveyor is connected to the horizontal screw conveyor, and a hydraulic motor is installed on the screw. When the automatic output carriage loaded with raw materials enters the operating position, the two hydraulic cylinders at the front end of the automatic output carriage are instructed to move, pushing the vertical screw conveyor to tilt forward. The discharge port above the vertical screw conveyor is combined with the feed port of the downstream equipment, and the rubber corrugated seal on the outer wall of the discharge port has a sealing effect on the joint.

[0074] Turn the handle of the discharge gate to open the compartment gate on the horizontal screw feeder to begin feeding. The quick connector on the hydraulic motor is plugged into the quick connector on the on-site power pack to adjust the raw material output flow rate as needed. The specially designed latches at the four corners of the bottom of the automatic output compartment are designed to penetrate and restrict return after insertion into the lock column. The four corner cones above the lock column can be adjusted for angle adjustment during lifting, making the automatic output compartment more convenient to seat. The automatic output compartment is designed with spindle-shaped lifting lugs specifically for lifting large objects, and is welded to the columns and bottom beam to ensure safe and convenient lifting and transportation of the automatic output compartment. To ensure the project volume, a weighing system was installed on the compartment guide rails. During construction, the weight and instantaneous flow rate of the dry shotcrete in the automatic output compartment were monitored at all times. The spray layer thickness was calculated based on the construction volume and the amount of raw materials used. The output flow rate and spraying speed of the automatic output compartment were adjusted based on this data to ensure that the spray layer thickness met the design requirements.

[0075] The automatic transport of carriages from the production base to the construction site is divided into four stages and four types of transport components according to the transportation status:

[0076] 1. After the automatic output car is filled with dry shotcrete at the production base, it is loaded into a tractor semi-trailer at the mine's material yard. A shim is installed on the flatbed of the tractor semi-trailer, and a lock column that matches the latch on the automatic output car is welded on the shim. During hoisting, the square lock frame of the automatic output car and the lock column on the shim are fitted and seated, and then the pin is passed through the socket of the square lock frame and the socket of the lock column, thereby fixing the automatic output car and the mine narrow-gauge flatbed car into a whole. In actual implementation, a 9-meter flatbed can load 4 cars at a time.

[0077] 2. After the automatic output car arrives at the mine material yard, it is hoisted onto a narrow-gauge flatbed truck with a narrow-gauge electric locomotive. It is then towed to the excavation face yard by a narrow-gauge battery locomotive. Mine battery locomotives are primarily used for underground transport in main lanes and long-distance surface transportation. Like electric locomotives in railway transportation, they pull trains consisting of mine cars or passenger cars on narrow-gauge tracks, transporting coal, gangue, materials, equipment, and personnel. The narrow-gauge flatbed truck is also equipped with shims, and lock posts matching the latches on the automatic output car are welded to the shims. After hoisting, the truck is secured with latches before it can be driven.

[0078] 3. The automatic output car is attached to a monorail crane in the working face yard and hoisted to the head. The automatic output car is specially designed with ox-shuttle lifting eyes. The lifting eyes are provided with lifting holes for attaching the monorail crane's heavy hook. The monorail crane uses a special I-beam track suspended above the center of the roadway. It is connected by a train with various functional lifting vehicles and is towed along the track by traction equipment. The traction power is generally diesel engines, batteries, or pneumatic devices. It can transport personnel, materials, and equipment to the required location on the working face. It has a built-in hook and automatic lifting, making loading and unloading convenient.

[0079] 4. The automatic output car is hoisted on the pallet of the hydraulic guide rail. By pushing the hydraulic cylinder, the wheel assembly under the pallet is dragged to roll, enter the working position, and combine with the downstream equipment. The hydraulic guide rail pallet is welded with a lock column that matches the latch on the automatic output car. After the hoisting is completed, it can be operated after the mortise and tenon work is completed with the latch. Since the monorail can only travel and hoist forward and backward in the lane, it cannot move and hoist left and right. At this stage, workers use crowbars and hoists to push and pull. Therefore, a hydraulic guide rail is specially designed to move the automatic output car left and right into the working position.

[0080] The hydraulic motor of the automatic output carriage, the power for pushing the hydraulic cylinder and the hydraulic guide rail are provided by the hydraulic power pack, and the speed of the horizontal and vertical screws can be adjusted by the command solenoid valve to control the flow of raw material output, and automatically and continuously supply raw materials to the downstream equipment in a quantitative manner; the hydraulic power pack is composed of a distribution compartment, a hydraulic oil compartment, a motor, a hydraulic oil pump, a solenoid valve, an oil pipe, etc. Because there are many hydraulic oil pipes and there are hidden dangers if the hydraulic oil pipes are placed randomly when the automatic output carriage is not in use, multiple oil pipe storage barrels are designed. The oil pipes can be coiled into the storage barrels when not in use, protecting the construction site. It is safe and convenient. The hydraulic power pack can be installed on wheels and towed by a lane repair machine, or it can be installed on the side of the hydraulic guide rail or on downstream equipment.

[0081] In summary, the automatic dry material supply system for mine-grade shotcrete grouting consists of a sealed material compartment capable of automatic and continuous quantitative output, rotating components integrated with it during each transport phase (a tractor semi-trailer, a narrow-gauge flatbed truck for mine-grade shotcrete placement, a monorail crane, and hydraulic guide rails), and a hydraulic power pack that provides power once the system reaches the construction site. The automatic dry material supply system for mine-grade shotcrete grouting can conveniently and efficiently complete previously complex and laborious tasks. It solves the problem of dust emission during construction in confined underground spaces, controls and improves project quality, and is an essential specialized equipment for shotcrete construction in the future of mechanized and intelligent coal mine production.

[0082] The present invention and its embodiments are described above. This description is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if a person skilled in the art is inspired by this and, without departing from the purpose of the present invention, designs structures and embodiments similar to this technical solution without inventiveness, they shall fall within the scope of protection of the present invention.

Claims

1. An automatic dry material supply system for mine spraying, characterized in that: It includes an automatic output carriage and a traction semitrailer, a narrow-gauge flatbed truck for mining, a monorail crane, and a carriage guide rail for transporting the automatic output carriage; the automatic output carriage includes a main carriage, a bottom plate, a horizontal screw feeder, and a vertical screw feeder; the carriage guide rail is arranged under the underground monorail, the carriage guide rail includes a base channel steel arranged at intervals, the two sides of the base channel steel are detachably connected with rails, a pallet is detachably placed on the rail, the middle part of the pallet is connected to a movable connection device through a hydraulic piston push rod so that the pallet can slide on the rail, a wheel assembly in contact with the rail is arranged at the bottom of the pallet, and a weighing system is arranged at the top; The main compartment is provided with a compartment discharge port on the top and a compartment gate on the bottom. The four corners of the main compartment are connected to the bottom plate through brackets and the bottom support of the bin. The compartment discharge port is connected to the feeding end of the horizontal screw feeder through a discharge gate. The discharge end of the horizontal screw feeder is connected to the feeding end at the bottom of the vertical screw feeder through a movable short pipe. The four corners of the bottom plate are respectively provided with latch assemblies corresponding to the tractor semi-trailer, the narrow-gauge flatbed truck for mining, and the pallet, and the tractor semi-trailer, the narrow-gauge flatbed truck for mining, and the pallet are provided with lock posts corresponding to the latch assemblies; the latch assemblies include a square lock frame for the lock posts to be inserted, and the square lock frame and the lock posts are correspondingly provided with a first plug hole and a second plug hole, and a latch inserted into the first plug hole and the second plug hole is provided on one side of the square lock frame, and the latch is provided on the latch support block through a latch ring, and a latch handle is provided on the upper part of the latch to prevent the latch from returning to its original position by leaning against a latch limit block. The top of the lock post is provided with a four-corner cone, and the bottom of the lock post is provided with a washer.

2. The automatic dry material supply system for mine spraying according to claim 1 is characterized in that: The bottom of the main body is an inverted cone-shaped bottom, and a pressure plate is arranged at the gate of the body; two ox-shuttle-shaped lifting ears are arranged on the top of the main body, and lifting holes are arranged on the ox-shuttle-shaped lifting ears.

3. The automatic dry material supply system for mine spraying according to claim 1 is characterized in that: A vertical screw discharge port is arranged at the top of the vertical screw conveyor, a push plate is fixed on the side of the vertical screw conveyor away from the main compartment, a pushing hydraulic cylinder is arranged between the push plate and the outer wall of the main compartment; one end of the pushing hydraulic cylinder is hinged to the push plate through a vertical screw support, and the other end is hinged to the main compartment through a movable support of the compartment.

4. The automatic dry material supply system for mine spraying according to claim 1 is characterized in that: A discharge port sealing door is provided at the discharge port of the compartment, and the discharge port sealing door includes a steel plate, a rubber lining covering the bottom of the steel plate, and a thickened steel plate arranged at the center of the top of the steel plate. The outer edge of the rubber lining is provided with several circles of toothed grooves, and a Y-shaped pressure rod is pressed on the top of the steel plate. Both ends of the Y-shaped pressure rod are fixed to the connecting ears on the top of the main compartment by fixing pins respectively, and the center of the Y-shaped pressure rod is against the top of the thickened steel plate by a clamping bolt, and a clamping handle is provided on the top of the clamping bolt.

5. The automatic dry material supply system for mine spraying according to claim 1 is characterized in that: The outer end of the vertical spiral discharge port is sleeved with a discharge port sealing cover, and the discharge port sealing cover is detachably connected to the vertical spiral discharge port through the cooperation of internal threads and external threads. A rubber corrugated seal and a clamp are arranged between the discharge port sealing cover and the outer wall of the vertical spiral feeder; a power assist handle is arranged on the outer side of the discharge port sealing cover.

6. The automatic dry material supply system for mine spraying according to claim 1 is characterized in that: Connecting pipes corresponding to the base channel steel are arranged outwardly on both sides of the track, and a bolt hole 1 is arranged on the connecting pipe. A placement groove corresponding to the track and a bolt hole 2 corresponding to the bolt hole 1 are arranged on the base channel steel. The track is detachably connected to the base channel steel by bolts.

7. The automatic dry material supply system for mine spraying according to claim 1 is characterized in that: A square steel is arranged at the center of the track, and the bottom of the pallet is slidably arranged on the square steel. The bottom of the pallet is also provided with a movable connection device connected to the hydraulic piston push rod. The movable connection device includes a top plate connected to the bottom of the pallet, and side plates located on both sides of the hydraulic piston push rod are arranged at the lower part of the top plate. The side plates are connected to the hydraulic piston push rod through connecting pins.

8. The automatic dry material supply system for mine spraying according to claim 1 is characterized in that: The wheel assembly comprises a wheel bracket connected to the bottom of the tray, and a plurality of H-shaped groove wheels are arranged in the wheel bracket.

9. The automatic dry material supply system for mine spraying according to claim 1, characterized in that: The weighing system includes a weighing panel laid on the upper part of the pallet, the bottom of the weighing panel is fixed to the pallet through a weighing bottom plate, and four mining explosion-proof weighing sensors are arranged between the bottom of the weighing panel and the pallet. The weighing panel is fixed to the pallet frame through positioning bolts.

10. The automatic dry material supply system for mine spraying according to claim 1, characterized in that: The horizontal screw conveyor and the vertical screw conveyor are respectively driven by hydraulic motors, and the hydraulic motors are connected to a hydraulic power pack. The hydraulic power pack includes a distribution box, a motor connected to the distribution box, a hydraulic oil tank connected to the motor, a hydraulic oil pump and a solenoid valve connected to the hydraulic oil tank. The hydraulic power pack is also provided with several oil pipe storage barrels.

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