Mining concrete preparation system

Abstract

The utility model belongs to the technical field of concrete preparation, and particularly relates to a mining concrete preparation system which comprises a feeding device, a cement feeding device, a belt conveyor, a spiral conveying mechanism and a stirring machine, the feeding device comprises a stock bin support and a plurality of stock bins, weighing sensors are arranged between the stock bins and the stock bin support, the stock bins correspond to the belt conveyor in an up-and-down mode, and the spiral conveying mechanism is connected with the stirring machine. The discharging end of the belt conveyor extends to a position above the feeding hole of the stirrer; the cement feeding device comprises a cement bin support, a cement bin, a feeding hopper, a cement feeding vertical screw conveyor and a cement feeding horizontal screw conveyor, the cement bin is arranged on the cement bin support, a weighing sensor is arranged at the lower end of the cement bin support, a screw conveying mechanism is arranged below the cement bin in a communicating mode, and a discharging port of the screw conveying mechanism is located above a feeding port of the stirring machine. Various raw materials needed by concrete are directly determined through the weighing sensor and conveyed to the stirring machine to be mixed and stirred to achieve concrete preparation, large-batch concrete preparation can be rapidly achieved, and the preparation efficiency is effectively improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of concrete preparation, and in particular relates to a mining concrete preparation system. Background Art

[0002] Mine support concrete is a critical process in tunnel construction. Currently, dry and wet shotcrete processes are commonly used for this purpose. These processes, however, are associated with high rebound, high dust production, low efficiency, and unstable mix quality. Consequently, wet shotcrete has been gradually replaced. Currently, mine concrete production often relies on simple mechanized operations with manual batching, which is labor-intensive, results in uneven mix proportions, and poor concrete quality, severely impacting construction efficiency and quality. Summary of the Invention

[0003] In order to solve the problems in the existing concrete preparation process such as high labor intensity and uneven proportioning of manual ingredients leading to low concrete quality and low efficiency, the utility model provides a mining concrete preparation system, which directly determines the various raw materials required for concrete through weighing sensors and transports them to the mixer for mixing and stirring to achieve concrete preparation. It can also quickly realize large-scale concrete preparation, effectively improving preparation efficiency.

[0004] In order to achieve the above purpose, the technical solution of the utility model is:

[0005] A mining concrete preparation system includes a feeding device, a cement feeding device, a belt conveyor, a screw conveying mechanism and a mixer. The feeding device includes a silo bracket and multiple silos arranged in parallel on the silo bracket. A weighing sensor is provided between the silo and the silo bracket. A cylinder is provided at the lower end of the silo. The output end of the cylinder is connected to a silo door hinged at the lower end of the silo to drive the silo door to open and close. The silo door corresponds to the belt conveyor up and down. The discharge end of the belt conveyor extends above the mixer feed port. Concrete preparation raw materials are added to the corresponding silos respectively, and the materials are weighed by the weighing sensor. Then the cylinder drives the silo door to rotate and open. The weighed materials fall onto the belt conveyor and are transported to the mixer.

[0006] The cement feeding equipment includes a cement silo bracket, a cement silo, a hopper, a vertical cement feeding screw machine, and a horizontal cement feeding screw machine. A cement silo is arranged on the cement silo bracket, and a weighing sensor is arranged at the lower end thereof. A vertical cement feeding screw machine is arranged on one side of the cement silo bracket. The lower end of the vertical cement feeding screw machine is connected to the hopper, and the upper end is connected to the horizontal cement feeding screw machine. The horizontal cement feeding screw machine is located directly above the cement silo, and a plurality of discharge ports are provided at the lower end thereof. A spiral conveying mechanism is provided below the cement silo, and the discharge port of the spiral conveying mechanism is located above the feed port of the mixer. Bulk cement is added to the hopper and conveyed by the vertical cement feeding screw machine and the horizontal cement feeding screw machine. Uniform discharge in the cement silo is ensured through a plurality of discharge ports, and after being weighed by the weighing sensor, it is conveyed to the mixer through the spiral conveying mechanism.

[0007] Preferably, a receiving hopper and a water tank are provided at the upper end of the mixer, a receiving hopper is provided on the feed port of the mixer, the upper part of the receiving hopper corresponds to the belt conveyor and the discharge end of the spiral conveying mechanism, the water tank is connected to the mixer pipeline, and the water tank provides a certain amount of water, which is mixed with the concrete preparation raw materials and cement in the mixer to prepare concrete.

[0008] Preferably, the belt conveyor passes through the lower end of the cement silo bracket, and the spiral conveying mechanism is arranged above the belt conveyor. By arranging the belt conveyor and the spiral conveying mechanism in correspondence with each other up and down, the area occupied by the equipment is effectively reduced and the space utilization of the equipment is improved.

[0009] Preferably, the belt conveyor includes a horizontal conveying part and an inclined conveying part. The horizontal conveying part corresponds to the silo doors of multiple silos up and down. The horizontal conveying part is connected to the inclined conveying part. The inclined conveying part extends to the top of the mixer, and receives the material unloaded from the silo through the horizontal conveying part and transports it to the mixer through the inclined conveying part.

[0010] Preferably, the lower side walls of the silo and cement silo are both provided with pneumatic vibrators, and the vibrators are activated to ensure that the unloading is complete and the raw material ratio during concrete preparation is guaranteed.

[0011] Preferably, the screw conveying mechanism includes a cement feeding horizontal screw machine and a cement feeding inclined screw machine. The side of the cement feeding horizontal screw machine is correspondingly connected to the discharge port at the lower end of the cement silo. The cement feeding horizontal screw machine is connected to the cement feeding inclined screw machine. The cement feeding inclined screw machine is connected to the cement silo bracket through a pull rod mechanism. The cement in the cement silo is transported by the cement feeding horizontal screw machine, and the cement is transported to the mixer through the cement feeding inclined screw machine.

[0012] Preferably, the pull rod mechanism includes an extension rod, a first connecting rod and a second connecting rod. An extension rod is hinged on one side of the upper end of the cement silo bracket, and the end of the extension rod is hinged to the side of the cement material-taking inclined screw machine. A connecting block is fixedly arranged on the lower side of the middle part of the extension rod. A first connecting rod is hinged between the connecting block and the middle part of the cement silo bracket, and a second connecting rod is hinged between the connecting block and the side of the cement material-taking inclined screw machine. The fixation and inclination angle of the cement material-taking inclined screw machine are guaranteed by the extension rod and the second connecting rod, and the support stability and connection strength of the pull rod mechanism are guaranteed by the extension rod, the first connecting rod and the second connecting rod.

[0013] Through the above technical solution, the beneficial effects of the utility model are:

[0014] 1. The utility model uses a weighing sensor to individually weigh a variety of raw materials for concrete preparation, thereby ensuring the raw material ratio during concrete preparation and the quality of the prepared concrete.

[0015] 2. The utility model drives the silo door to open and close through the cylinder, ensuring that the concrete raw materials (sand, aggregate, etc.) are transported and prepared after being weighed, making it easy to control whether the silo is unloaded and convenient to weigh.

[0016] 3. The utility model transports bulk cement into the cement silo by arranging a vertical screw machine and a horizontal screw machine for cement feeding. The weighing sensor arranged at the lower end of the cement silo bracket weighs the weight of the entire cement feeding equipment to ensure the weight of cement during concrete preparation and the ratio of raw materials for concrete preparation.

[0017] 4. The utility model opens multiple discharge ports on the lower side of the cement feeding horizontal screw machine, so that the cement is more dispersed and evenly distributed when entering the cement silo, avoiding the accumulation of cement at the feeding position in the cement silo due to the long cement silo, resulting in the space in the cement silo not being fully utilized, or the material level in the cement silo being too high to affect subsequent feeding.

[0018] 5. The utility model ensures uniform discharge of cement from the cement silo by correspondingly connecting the upper side of the cement reclaiming horizontal screw machine with the cement silo discharge port, thereby avoiding the situation where only cement at the discharge position can be transported out of the cement silo by the cement reclaiming horizontal screw machine when discharging cement from the cement silo, affecting the discharge of cement from the cement silo.

[0019] 6. The utility model uses pneumatic vibrators provided at the lower ends of the silo and cement silo to ensure that the materials in the silo and cement silo are completely discharged after weighing, thereby avoiding affecting the raw material ratio during cement preparation.

[0020] 7. The utility model effectively improves the space utilization rate of the equipment and reduces space occupancy by arranging the spiral conveying mechanism above the belt conveyor, and the belt conveyor passes through the lower end of the cement silo bracket.

[0021] 8. The utility model connects and fixes the cement material taking inclined screw machine through a pull rod mechanism to ensure that the discharge port of the cement material taking inclined screw machine is located above the receiving hopper, and the stability of the pull rod mechanism is ensured by the first connecting rod, the extension rod and the cement silo bracket surrounding the triangular structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural diagram of the present utility model.

[0023] Figure 2 This is a schematic diagram of the structure of the feeding equipment of this utility model Figure 1 .

[0024] Figure 3 This is a schematic diagram of the structure of the feeding equipment of this utility model Figure 2 .

[0025] Figure 4 This is a structural diagram of the cement feeding equipment and the pull rod mechanism of the utility model.

[0026] Figure 5 It is a structural schematic diagram of the cement feeding equipment of the present utility model.

[0027] The numbers in the accompanying drawings are: 1 for feeding equipment, 2 for cement feeding equipment, 3 for horizontal conveying part, 4 for inclined conveying part, 5 for mixer, 6 for silo bracket, 7 for silo, 8 for weighing sensor, 9 for cylinder, 10 for silo door, 11 for cement silo bracket, 12 for cement silo, 13 for feeding hopper, 14 for vertical screw machine for cement feeding, 15 for horizontal screw machine for cement feeding, 16 for discharge port, 17 for receiving hopper, 18 for water tank, 19 for pneumatic vibrator, 20 for horizontal screw machine for cement feeding, 21 for inclined screw machine for cement feeding, 22 for extension rod, 23 for first connecting rod, 24 for second connecting rod, and 25 for connecting block. DETAILED DESCRIPTION

[0028] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0029] like Figures 1 to 5As shown, this embodiment provides a mining concrete preparation system, including a feeding device 1, a cement feeding device 2, a belt conveyor, a screw conveying mechanism and a mixer 5. The feeding device 1 includes a silo bracket 6 and multiple silos 7 arranged in parallel on the silo bracket 6. A weighing sensor 8 is provided between the silo 7 and the silo bracket 6. The weighing sensor 8 model is GZD20. Multiple silos 7 weigh sand, aggregate or various dry materials respectively through the corresponding weighing sensor 8 to ensure the proportion of concrete raw materials. A cylinder 9 is provided at the lower end of the silo 7. The output end of the cylinder 9 is connected to the silo door 10 hinged at the lower end of the silo 7 to drive the silo door 10 to open and close. The silo door 10 is set to an arc-shaped plate structure. The silo door 10 covers the discharge port of the silo 7. The fan-shaped plates are fixedly connected at both ends of the silo door 10. The upper end of the fan-shaped plate is hinged to the side wall of the silo 7. The cylinder 9 drives the silo door 10 to swing to realize the opening and closing of the discharge port of the silo 7 by the silo door 10.

[0030] As an implementable embodiment, a scraper conveyor is provided on the silo support 6 for loading the silo 7 .

[0031] The bin door 10 corresponds to the belt conveyor up and down, and the discharge end of the belt conveyor extends to above the feed port of the mixer 5. The drive of the belt conveyor can be an electric roller, a motor with a reducer or other conventional devices that meet the conveying work requirements of the belt conveyor. The belt conveyor includes a horizontal conveying part 3 and an inclined conveying part 4. The horizontal conveying part 3 corresponds to the bin doors 10 of multiple silos 7 up and down. When the bin door 10 is opened, the material is discharged through the discharge port of the silo 7 and falls on the horizontal conveying part 3. The weight of the material in the silo 7 is weighed by the weighing sensor 8 corresponding to the silo 7. When the weight of the material falling on the horizontal conveying part 3 reaches the required weight, the cylinder 9 drives the bin door 10 to close, and the silo 7 stops unloading. The horizontal conveying part 3 is connected to the inclined conveying part 4. The inclined conveying part 4 extends to above the mixer 5. The material in the silo 7 is transported to the mixer 5 through the horizontal conveying part 3 and the inclined conveying part 4 in turn.

[0032] The cement feeding equipment 2 includes a cement silo bracket 11, a cement silo 12, a hopper 13, a cement feeding vertical screw machine 14, and a cement feeding horizontal screw machine 15. The cement silo bracket 11 is provided with a cement silo 12, and a weighing sensor 8 is provided at its lower end. The weighing sensor 8 is used to weigh the entire cement feeding equipment 2 and the screw conveying mechanism. A cement feeding vertical screw machine 14 is provided on one side of the cement silo bracket 11. The lower end of the cement feeding vertical screw machine 14 is connected to the hopper 13 and the upper end is connected to the cement feeding horizontal screw machine 15. Bulk cement is added to the hopper 13, and the feed port of the cement feeding vertical screw machine 14 is connected to the hopper 13, and then the cement feeding vertical screw machine 14 is connected to the hopper 13. The cement in the upper hopper 13 is transported to the cement feeding horizontal screw machine 15, which is located directly above the cement silo 12 and has multiple discharge ports 16 at its lower end. The cement falls evenly into the cement silo 12 through the multiple discharge ports 16. If only one discharge port 16 is set, since the cement silo 12 is long, in order to avoid the cement from accumulating at the position corresponding to the discharge port 16 after entering the cement silo 12, so that the position far away from the discharge port 16 in the cement silo 12 cannot be utilized, and the cement level in the cement silo 12 at the position corresponding to the discharge port 16 is too high, affecting the unloading of the discharge port 16, the discharge ports 16 are evenly distributed in multiple directions along the length of the cement silo 12, affecting the unloading of the discharge port 16.

[0033] As an implementable embodiment, the cement feeding device 2 can also adopt the form of the feeding device 1 to realize cement feeding.

[0034] A screw conveying mechanism is provided below the cement silo 12, and the discharge port of the screw conveying mechanism is located above the feed port of the mixer 5. The screw conveying mechanism includes a cement feeding horizontal screw machine 20 and a cement feeding inclined screw machine 21. The side of the cement feeding horizontal screw machine 20 is correspondingly connected to the discharge port at the lower end of the cement silo 12. The discharge port of the cement silo 12 is arranged along its length direction. The discharge port is connected to the side of the cement feeding horizontal screw machine 20 to avoid the cement from being discharged evenly when the cement silo 12 is discharged, resulting in residual material piles in the cement silo 12, and effectively increasing the discharge speed of the cement silo 12. The cement feeding horizontal screw machine 20 is connected to the cement feeding inclined screw machine 21, and the cement is transported to the mixer 5 through the cement feeding inclined screw machine 21. The amount of cement added to the mixer 5 is determined by the cement silo bracket 11. When the amount is reached, the screw conveying mechanism stops working.

[0035] A receiving hopper 17 and a water tank 18 are provided at the upper end of the mixer 5. A receiving hopper 17 is provided on the feed port of the mixer 5. The upper part of the receiving hopper 17 corresponds to the discharge end of the belt conveyor and the screw conveyor mechanism. The material conveyed by the belt conveyor and the screw conveyor mechanism is received by the receiving hopper 17 to prevent the material from spilling. The water tank 18 is connected to the mixer 5 pipeline. The water tank 18 delivers the required quantitative water to the mixer 5 through a flow meter and a water pump. A float or other form can also be used to control the flow rate of the required water. Then, the sand, aggregate, etc. conveyed by the belt conveyor, the cement conveyed by the screw conveyor mechanism, and the water provided by the water tank 8 are mixed in the mixer 5 to achieve concrete preparation.

[0036] The belt conveyor passes through the lower end of the cement silo bracket 11, and the spiral conveying mechanism is arranged above the belt conveyor. By arranging the spiral conveying mechanism above the belt conveyor, the space occupied by the belt conveyor and the spiral conveying mechanism is effectively reduced, and the space utilization of the equipment is improved.

[0037] The lower side walls of the silo 7 and the cement silo 12 are both provided with pneumatic vibrators 19, and the model of the pneumatic vibrators 19 is G30T. By starting the corresponding pneumatic vibrators 19 when unloading the silo 7 and the cement silo 12, the materials on the inner walls of the silo 7 and the cement silo 12 are shaken off, the unloading speed is guaranteed, the unloading is thorough, and the raw material ratio of concrete preparation is guaranteed.

[0038] The cement material taking inclined screw machine 21 is connected to the cement silo bracket 11 through a pull rod mechanism, and the pull rod mechanism includes an extension rod 22, a first connecting rod 23 and a second connecting rod 24. The extension rod 22 is hinged on one side of the upper end of the cement silo bracket 11, and the end of the extension rod 22 is hinged to the side of the cement material taking inclined screw machine 21. A connecting block 25 is fixedly arranged on the lower side of the middle part of the extension rod 22. The first connecting rod 23 is hinged between the connecting block 25 and the middle part of the cement silo bracket 11, and the second connecting rod 24 is hinged between the connecting block 25 and the side of the cement material taking inclined screw machine 21. The cement material taking inclined screw machine 21 is hoisted and fixed by the extension rod 22 and the second connecting rod 24, and the inclination angle of the cement material taking inclined screw machine 21 is ensured. The overall stability and strength of the pull rod mechanism are ensured by forming a triangle between the extension rod 22, the first connecting rod 23 and the cement silo bracket 11.

[0039] As an implementable embodiment, a hydraulic pump station is set under the mixer 5, and a gate is set at the outlet of the mixer 5. The gate is opened and closed by a hydraulic cylinder. The hydraulic pump station is used to rotate the mixing shaft of the mixer 5 and provide power for the hydraulic cylinder. Other existing technologies can also be used to meet the mixing work of the mixer 5 and drive the gate to open and close.

[0040] It should be noted that the present invention further includes a control console 26 , which controls the above operations by adopting a mine-used flameproof and intrinsically safe control console of model TJ127 (A).

[0041] Before use, sand, aggregate or various dry materials are added to the multiple silos 7 respectively (materials can be added to the silo 7 through the scraper conveyor box), and bulk cement is added to the upper hopper 13. The cement in the upper hopper 13 is evenly added to the cement silo 12 through the cement feeding vertical screw machine 14 and the cement feeding horizontal screw machine 15.

[0042] During concrete preparation, the cylinder 9 drives the silo door 10 to open, so that the sand and other materials in the silo 7 fall onto the belt conveyor and are transported to the mixer 5. The weight of different materials falling on the belt conveyor is calculated by the weighing sensors 8 corresponding to the silo 7 on the silo bracket 6. When the weight of the material falling from the silo 7 on the belt conveyor reaches the weight required for concrete preparation, the cylinder 9 drives the silo door 10 to close, and the silo 7 stops unloading; at the same time, the screw conveying mechanism is started to transport the cement in the cement silo 12 to the mixer 5, and the weighing sensor 8 provided under the cement silo bracket 11 calculates the weight of the cement transported to the mixer 5 by the screw conveying mechanism. When the amount of cement transported reaches the amount required for concrete preparation, the screw conveying mechanism stops working; at the same time, water in the water tank 18 is added to the mixer 5, and the flow rate of water added to the mixer 5 is calculated by the flow meter. When the amount of water transported reaches the amount required for concrete preparation, the water transport to the mixer 5 is stopped.

[0043] Then the mixer 5 is started to mix the materials in the mixer 5 to prepare the concrete.

[0044] The embodiments described above are only preferred embodiments of the present invention and do not limit the scope of implementation of the present invention. Therefore, any equivalent changes or modifications made based on the structure, 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 mining concrete preparation system, characterized in that: The invention comprises a feeding device (1), a cement feeding device (2), a belt conveyor, a screw conveying mechanism and a mixer (5), wherein the feeding device (1) comprises a silo bracket (6) and a plurality of silos (7) arranged in parallel on the silo bracket (6), a weighing sensor (8) is arranged between the silo (7) and the silo bracket (6), a cylinder (9) is arranged at the lower end of the silo (7), an output end of the cylinder (9) is connected to a silo door (10) hinged at the lower end of the silo (7), and drives the silo door (10) to open and close, the silo door (10) corresponds to the belt conveyor up and down, and the discharge end of the belt conveyor extends to above the feed port of the mixer (5); The cement feeding equipment (2) comprises a cement silo support (11), a cement silo (12), a hopper (13), a cement feeding vertical screw machine (14), and a cement feeding horizontal screw machine (15). The cement silo (12) is arranged on the cement silo support (11), and a weighing sensor (8) is arranged at the lower end thereof. The cement feeding vertical screw machine (14) is arranged on one side of the cement silo support (11). The lower end of the cement feeding vertical screw machine (14) is connected to the hopper (13), and the upper end is connected to the cement feeding horizontal screw machine (15). The cement feeding horizontal screw machine (15) is located directly above the cement silo (12), and a plurality of discharge ports (16) are provided at the lower end thereof. A screw conveying mechanism is arranged below the cement silo (12), and the discharge port of the screw conveying mechanism is located above the feed port of the mixer (5).

2. A mining concrete preparation system according to claim 1, characterized in that: A receiving hopper (17) and a water tank (18) are provided at the upper end of the mixer (5). A receiving hopper (17) is provided on the feed port of the mixer (5). The upper portion of the receiving hopper (17) corresponds to the belt conveyor and the discharge end of the spiral conveying mechanism. The water tank (18) is connected to a pipeline of the mixer (5).

3. A mining concrete preparation system according to claim 1, characterized in that: The belt conveyor passes through the lower end of the cement silo bracket (11), and the spiral conveying mechanism is arranged above the belt conveyor.

4. A mining concrete preparation system according to claim 1, characterized in that: The belt conveyor comprises a horizontal conveying portion (3) and an inclined conveying portion (4), wherein the horizontal conveying portion (3) corresponds to the silo doors (10) of the plurality of silos (7) above and below, the horizontal conveying portion (3) is connected to the inclined conveying portion (4), and the inclined conveying portion (4) extends above the mixer (5).

5. A mining concrete preparation system according to claim 1, characterized in that: The lower side walls of the silo (7) and the cement silo (12) are both provided with pneumatic vibrators (19).

6. A mining concrete preparation system according to claim 1, characterized in that: The screw conveying mechanism includes a cement material taking horizontal screw machine (20) and a cement material taking inclined screw machine (21); the side of the cement material taking horizontal screw machine (20) is correspondingly connected to the discharge port at the lower end of the cement silo (12); the cement material taking horizontal screw machine (20) is connected to the cement material taking inclined screw machine (21); and the cement material taking inclined screw machine (21) is connected to the cement silo bracket (11) through a pull rod mechanism.

7. A mining concrete preparation system according to claim 6, characterized in that: The pull rod mechanism includes an extension rod (22), a first connecting rod (23) and a second connecting rod (24); the extension rod (22) is hinged to one side of the upper end of the cement silo bracket (11); the end of the extension rod (22) is hinged to the side of the cement material taking inclined screw machine (21); a connecting block (25) is fixedly provided on the lower side of the middle part of the extension rod (22); the first connecting rod (23) is hinged between the connecting block (25) and the middle part of the cement silo bracket (11); and the second connecting rod (24) is hinged between the connecting block (25) and the side of the cement material taking inclined screw machine (21).

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