Mine paste filling powder batching device

Abstract

The utility model discloses a mine paste filling powder batching device and method. The mine paste filling powder batching device comprises a silo, a silo top cover is arranged at the top of the silo, a dust remover and a safety valve are arranged on the silo top cover, a feeding port is formed in the upper portion of the silo and connected with a feeding pipe, and the bottom end of the silo is connected with an upper port of a silo cone. A lower port of the bin cone is connected with one end of a feeding pipe through a pneumatic butterfly valve A and a tubular flexible connector A, the other end of the feeding pipe is connected with a hopper top cover of a hopper barrel, the bottom end of the hopper barrel is connected with an upper port of a hopper cone, and a lower port of the hopper cone is connected with a feeding port of a spiral conveyor through a pneumatic butterfly valve B and a tubular flexible connector B; one end of the breathing pipe is connected with the side face of the feeding pipe, and the other end of the breathing pipe is connected with the hole opening of the hopper top cover; and a plurality of flow aiding devices are arranged on the cone wall of the bin cone and / or the cone wall of the hopper cone.

Description

Technical Field

[0001] This utility model belongs to the technical field of mining paste filling equipment, and in particular relates to a powder batching device for mining paste filling. Background Technology

[0002] The mixing and batching process for mine paste backfilling includes two methods: intermittent batching and continuous batching. Intermittent batching requires equipment with high instantaneous capacity, long-term no-load operation, and high system energy consumption; continuous batching has large cumulative errors, slow corrective response, easy proportioning imbalance, and distorted material consumption management. Both processes use silos to store powder materials and screw conveyors at the bottom of the silos for discharge. The mismatch between the silo's gravity discharge and the screw conveyor's discharge capacity makes it impossible to maintain a steady state at the silo opening, causing problems such as material arching, material impact, system proportioning imbalance, and downstream dust pollution. In addition, different batching processes use different equipment, resulting in a wide variety of mine backfilling equipment and difficulties in process selection and equipment maintenance. Mine backfilling urgently needs a universal device that can be used for both intermittent and continuous batching. Utility Model Content

[0003] The present invention aims to overcome the shortcomings of the prior art and provide a powder batching device for filling mineral paste.

[0004] To achieve the above objectives, the technical solution provided by this utility model is as follows:

[0005] The mining paste filling powder batching device includes a silo (5), a silo top cover (1) on the top of the silo (5), a dust collector (2) and a safety valve (3) on the silo top cover (1), a feed inlet on the upper part of the silo (5) and a feed pipe (4) connected to the upper port of the silo cone (6) at the bottom; the lower port of the silo cone (6) is connected to one end of the feed pipe (14) through an A pneumatic butterfly valve (12) and an A tubular flexible connection (13), and the other end of the feed pipe (14) is connected to a bucket (20). The bucket top cover (19) is connected to the upper port of the bucket cone (18) at the bottom end of the bucket cylinder (20). The lower port of the bucket cone (18) is connected to the feed port of the screw conveyor (23) through the B pneumatic butterfly valve (21) and the B tubular flexible connection (22). The mining paste filling powder batching device also includes a breathing pipe (10). One end of the breathing pipe (10) is connected to the side of the feeding pipe (4), and the other end is connected to the opening of the bucket top cover (19). Multiple flow aids are provided on the cone wall of the bin cone (16) and / or the cone wall of the bucket cone (18).

[0006] Preferably, the mining paste filling powder batching device further includes a silo support leg (24) arranged around the bottom side wall of the silo (5); a ring beam (17) is arranged around the upper part of the outer side of the bucket (20), and the outer side of the ring beam (17) is connected to the silo support leg (24); an ear seat (15) is provided on the outer side of the bucket (20) (distributed at a 120° angle along the bucket), and a weighing sensor (16) is connected to the lower surface of the ear seat (15), and the weighing sensor (16) is also connected to the upper surface of the ring beam (17).

[0007] Preferably, an A pneumatic ball valve (8) is connected in series in the middle of the feeding pipe (4), one end of the breathing pipe (10) is connected to the feeding pipe (4) above the A pneumatic ball valve (8), and a B pneumatic ball valve (9) and a C tubular flexible connection (11) are connected in series in the middle of the breathing pipe (10).

[0008] Preferably, the flow aid device (7) includes a rectangular flange (30) with an orifice, a rotary rake arm (31), a range extender connecting rod (32), a rotary disk (33), a torque extender connecting rod (34), a drive cylinder (35), and two parallel disc shells (36); the upper part of the front of the rectangular flange (30) is provided with a rake arm lug (37), and the rake arm lug (37) is hinged to the top of the rotary rake arm (31) through a pin (38); the disc shell (36) is provided on the lower part of the back of the rectangular flange (30), and the bottom edge of the disc shell (36) is welded to the edge of the orifice of the rectangular flange (30); the rotary disk (33) is provided between the two disc shells (36), and a fixed drive shaft (39) is provided at the center of the rotary disk (33), and the two ends of the fixed drive shaft (39) are rotatably connected to the centers of the two disc shells (36); The rotary rake arm (31) has a range extender lug (40) in the center of its front side, and the rotary disk (33) has a raised lug on the outer edge. The raised lug is hinged to one end of the range extender connecting rod (32) via a C-pin (41), and the other end of the range extender connecting rod (32) is hinged to the range extender lug (40) via a B-pin (42). The upper part of the back of the rectangular flange (30) has a cylinder lug (26). The top of the drive cylinder (35) is hinged to the cylinder lug (26) via a D-pin (27), and the actuating end of the drive cylinder (35) is hinged to one end of the torque-increasing connecting rod (34) via an E-pin (28). The other end of the torque-increasing connecting rod (34) is fixedly connected to the fixed transmission shaft (39). The rotary rake arm (31) has rake teeth (29). The rotary rake arm (31) adopts a rectangular long strip parallel double plate structure. The parallel double plates are provided with rake tooth mounting holes, and the rake teeth (29) are installed in the rake tooth mounting holes. The length of the rake teeth (29) is greater than the spacing between the parallel double plates. The rectangular flange (30) is installed on the outer side of the cone wall of the bin cone (6) and the outer side of the cone wall of the bucket cone (18). The rotary rake arm (31) is in the inner cavity of the bin cone (6) or the bucket cone (18). The upper part of the inner cavity of the bin cone (6) is provided with an isolation plate welded to the inner wall of the bin cone (6) or the bucket cone (18). The isolation plate divides the inner cavity of the bin cone (6) or the bucket cone (18) into four equal parts. The multiple flow aids (7) are evenly distributed in the four equal parts. The top edge of the isolation plate is flush with the top edge of the bin cone (6) or the bucket cone (18). The bottom edge of the isolation plate is parallel to the bottom edge of the bin cone (6) or the bucket cone (18). The bottom end of the rotary rake arm (31) is lower than the bottom edge of the isolation plate.

[0009] More preferably, four flow aids (7) are installed on both the bin cone (6) and the bucket cone (18), and the flow aids (7) are arranged at 90° intervals along the cone wall of the bin cone (6) or the cone wall of the bucket cone (18).

[0010] More preferably, the angle between the center line of the flow aid device (7) and the plane where the adjacent isolation plate is located is 45°.

[0011] More preferably, the isolation plate includes an isosceles trapezoidal plate and two right trapezoidal plates. The waistline of the isosceles trapezoidal plate is welded to the inner wall of the silo cone (6) or the bucket cone (18). The oblique waistline of the right trapezoidal plate is welded to the inner wall of the silo cone (6) or the bucket cone (18). The vertical waistline of the right trapezoidal plate is welded to the isosceles trapezoidal plate. The two right trapezoidal plates are on the same plane and perpendicular to the isosceles trapezoidal plate. A pressure box (25) is provided at the junction of the top edges of the isosceles trapezoidal plate and the right trapezoidal plate inside the silo cone (6).

[0012] Preferably, the disk shell (36) adopts a semi-circular volute structure; the rotary disk (36) is a single-plate solid circular disk structure; and the drive cylinder (35) is a telescopic cylinder or a rotary cylinder.

[0013] More preferably, the drive cylinder (35) is a pneumatic telescopic cylinder or a hydraulic telescopic cylinder.

[0014] Preferably, one end of the range extender (32) is a U-shaped tuning fork double-ear structure, and the other end is a single-hole ear handle structure. The shape of the range extender (32) is curved or straight. The distance between the two ends of the range extender (32) is greater than the vertical distance from the top of the range extender ear (40) to the reverse side of the rotary rake arm (31). One end of the torsion extender (34) is a U-shaped tuning fork double-ear structure, and the other end is a single-hole ear handle structure. The shape of the torsion extender (34) is curved or straight. The distance between the two ends of the torsion extender (34) is greater than the radius of the rotary table (33).

[0015] Preferably, the feed pipe 14 is a straight pipe of equal diameter, with a diameter larger than that of the pneumatic butterfly valve 12.

[0016] The screw conveyor 23 is driven by a variable frequency motor, and its inlet diameter is larger than that of the pneumatic butterfly valve 21.

[0017] The tubular flexible connector 13 has a gradually changing diameter. The smaller diameter end is equal to and connected to the diameter of the pneumatic butterfly valve 12 (A), and the larger diameter end is equal to and connected to the diameter of the feed pipe 14.

[0018] The tubular flexible connector 22 has a gradually changing diameter. The smaller diameter end is equal to and connected to the diameter of the B pneumatic butterfly valve 21, and the larger diameter end is equal to and connected to the diameter of the feed inlet of the screw conveyor 23.

[0019] The C-shaped flexible connector 11 is a body of equal diameter, and is equal in diameter to the pneumatic ball valve 9 and the breathing tube 10, respectively;

[0020] The aforementioned pneumatic ball valve 8 has the same diameter as the feed pipe 4;

[0021] The dust collector 2 is driven by a variable frequency fan.

[0022] The batching methods based on the above-mentioned mine paste filling powder batching device include an intermittent batching method based on a single set of mine paste filling powder batching device and a continuous batching method based on a double set of mine paste filling powder batching device;

[0023] (1): Loading the silo: Close the B pneumatic ball valve and the A pneumatic butterfly valve, open the A pneumatic ball valve and start the dust collector. The external powder material is pneumatically conveyed through the loading pipe and the A pneumatic ball valve 8 into the silo space formed by the silo cylinder and the silo cone. The pressure of the pressure box is used to monitor the material height in the silo. Loading stops when the silo is full. Close the A pneumatic ball valve to complete the loading of the silo.

[0024] (2): Feeding material from the silo to the hopper: Close the B pneumatic butterfly valve, open the B pneumatic ball valve and the A pneumatic butterfly valve 12, and turn on the flow aid device on the silo cone. The powder in the silo enters the hopper space formed by the hopper cylinder and the hopper cone through the A pneumatic butterfly valve, the A tubular flexible connection, and the feed pipe 14. The air in the hopper enters the silo cylinder through the breather pipe, the C tubular flexible connection, the B pneumatic ball valve, and the feed pipe, and is discharged through the dust collector. The weighing sensor monitors the weight of the powder in the hopper in real time. After the weight of the powder in the hopper reaches the set value, the A pneumatic butterfly valve and the flow aid device of the silo cone are closed, and the weight of the powder in the hopper is recorded as the initial value.

[0025] (3): Feeding material from the hopper: The feeding device starts the screw conveyor, opens the A pneumatic ball valve, the B pneumatic butterfly valve and the flow aid device located in the bucket cone. The powder in the hopper enters the feed port of the screw conveyor through the B pneumatic butterfly valve 21 and the B tubular flexible connection, and is fed to the outside through the discharge port of the screw conveyor. The outside air enters through the lower port of the feed pipe, and enters the bucket cylinder through the A pneumatic ball valve, the B pneumatic ball valve, the breather pipe and the C tubular flexible connection to achieve the air pressure balance inside and outside the hopper. The weighing sensor monitors the amount of powder reduction in the hopper in real time. When the weight of the remaining powder in the hopper reaches the set closing value, the screw conveyor, the B pneumatic butterfly valve and the flow aid device located in the bucket cone are closed. The weight of the powder in the hopper is recorded as the residual value. The difference between the initial value and the residual value is the actual discharge weight value.

[0026] (4): Repeat steps (1) and (2) to achieve intermittent batching.

[0027] (1): Loading the silo: Close the B pneumatic ball valve and the A pneumatic butterfly valve, open the A pneumatic ball valve and start the dust collector. The external powder material is pneumatically conveyed into the silo space formed by the silo cylinder and the silo cone through the feeding pipe and the A pneumatic ball valve. The material height in the silo is monitored by the pressure box. Loading stops when the silo is full. Close the A pneumatic ball valve to complete the loading of the silo.

[0028] (2): Feeding material from the silo to the hopper: Close the B pneumatic butterfly valve, open the B pneumatic ball valve and the A pneumatic butterfly valve, and turn on the flow aid device located in the silo cone. The powder in the silo enters the hopper space formed by the hopper cylinder and the hopper cone through the A pneumatic butterfly valve, the A tubular flexible connection, and the feed pipe. The air in the hopper enters the silo cylinder through the breather pipe, the C tubular flexible connection, the B pneumatic ball valve, and the feed pipe, and is discharged through the dust collector. The weighing sensor monitors the weight of the powder in the hopper in real time. After the weight of the powder in the hopper reaches the set value, the A pneumatic butterfly valve and the flow aid device of the silo cone are closed, and the weight of the powder in the hopper is recorded as the initial value.

[0029] (3): Feeding material from the hopper: The feeding device starts the screw conveyor, opens the A pneumatic ball valve, the B pneumatic butterfly valve and the flow aid device located in the bucket cone. The powder in the hopper enters the feed port of the screw conveyor through the B pneumatic butterfly valve and the B tubular flexible connection, and is fed to the outside through the discharge port of the screw conveyor. External air enters from the lower port of the feed pipe, and enters the bucket cylinder through the A pneumatic ball valve, the B pneumatic ball valve, the breather pipe and the C tubular flexible connection to achieve air pressure balance inside and outside the hopper. The weighing sensor monitors the amount of powder reduction in the hopper in real time and calculates the real-time discharge capacity. By correcting the operating frequency of the drive motor of the screw conveyor in real time, the discharge capacity reaches the set feeding capacity and remains stable. When the weight of the remaining powder in the hopper reaches the set closing value, the screw conveyor, the B pneumatic butterfly valve and the flow aid device located in the bucket cone are closed. The weight of the powder in the hopper is recorded as the residual value. The difference between the initial value and the residual value is the actual discharge weight value. The actual discharge weight value is compared with the actual discharge time to obtain the average discharge capacity.

[0030] (4): When the first batching device finishes step (3), the second batching device starts to execute step (3) synchronously. The first batching device executes steps (1) and (2), and the second batching device executes steps (1) and (2) when step (3) ends. The two batching devices cycle in a cross-loop manner to achieve continuous batching.

[0031] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0032] 1. A single set of the same batching device can be used to achieve intermittent batching of powder materials, while two sets can be used to achieve continuous batching. This realizes the standardization of batching devices for different process requirements and eliminates the drawbacks of difficult selection of mine backfilling processes and equipment management.

[0033] 2. The hopper located at the bottom of the silo has the following advantages:

[0034] (1) The material hopper is fed into the hopper by unobstructed gravity discharge, which is conducive to maintaining the steady state of the initial discharge of the material hopper, giving full play to the material discharge capacity of the material hopper, and eliminating the disadvantages of the traditional process where the screw conveyor and the material hopper discharge capacity are mismatched, the screw conveyor obstructs the material discharge of the material hopper, causing secondary arch bridges in the material hopper and disrupting the steady state of discharge.

[0035] (2) The hopper volume is much smaller than the bin volume, and the self-weight pressure of the powder in the hopper is also much smaller than that of the powder in the bin. The batch of powder in the hopper is in a fresh and loose state, which greatly reduces the possibility of powder arching in the hopper and helps to discharge smoothly.

[0036] (3) The hopper is connected to the feeding pipe and the A pneumatic ball valve through a pneumatic ball valve, a breathing pipe, a C-shaped flexible connection, and a dust collector shared with the silo. This achieves closed-loop control of the dust-laden airflow in the hopper feeding stage and replenishment of fresh airflow in the hopper discharging stage, which is environmentally friendly.

[0037] (4) The hopper is equipped with a weighing sensor and all external interfaces are connected in a flexible manner. In particular, there is a tubular flexible connection between it and the screw conveyor, which eliminates the influence of the screw conveyor's vibration on the hopper's weighing, ensuring accurate and reliable measurement.

[0038] (5) Under continuous batching conditions, it can realize static weighing of the beginning and end states of the hopper, eliminating the cumulative error of traditional continuous batching. It can also calculate the average continuous discharge capacity of this batch based on the static weighing difference between the beginning and end states, and compare it with the real-time discharge capacity of the process. It has the function of dual evaluation of continuous discharge capacity by both static and dynamic assessment of the beginning and end states.

[0039] (6) The hoppers share the same support legs, realizing the integration of the batching device, which has high space utilization and small space occupation.

[0040] 3. The upper part of the hopper cone is equipped with an isolation plate, dividing the cone into upper and lower sections. The upper section is divided by the isolation plate into four identical areas with vertical sidewalls, eliminating the condition for high-level powder to form an arch at the axis. The hopper cone is equipped with a flow aid device, which has the beneficial effects of a flow aid device (the rotation center of the rotary rake arm is located at the upper end, and the swing displacement of the lower end is greater than that of the upper end, which further activates the material near the upper end while breaking the compacted material at the lower end, which is conducive to the continuous and stable flow of powder from the cone to the lower outlet). The rotary rake wall adopts a rectangular long strip thin plate structure, and the plane of the thin plate is parallel to the discharge direction of the rotary rake wall, which is conducive to cutting the powder arch and has low energy consumption. It is equipped with a range extender lug and a range extender connecting rod, which can be configured and adjusted according to the material characteristics and the size of the hopper inclined wall to adjust the swing displacement of the lower end of the rotary rake arm 2, making it highly adaptable to the hopper structure. It features a torque-enhancing connecting rod, which can be lengthened to increase torque and reduce the thrust of the drive cylinder, resulting in low energy consumption. A rotary disc is included; the gap between the disc and the disc housing remains constant during rotation, preventing material from entering the gap and causing jamming, ensuring high reliability. The rotary rake arm has rake teeth, expanding the contact area with the material and providing excellent arch-breaking and flow-aiding effects. The stroke of the drive cylinder is adjustable to change the rotation angle of the rotary disc; one stroke of the drive cylinder allows the rotary rake arm to swing one or two times. The drive cylinder can be a telescopic type, driving the transmission shaft together with the torque-enhancing connecting rod, or a rotary type can directly drive the transmission shaft, allowing for selection based on material load characteristics and achieving low-energy drive. It has a dual flow-aiding function, solving the problem of poor material flow at its source.

[0041] 4. The upper part of the bucket cone is equipped with an isolation plate, which divides the bucket cone into upper and lower sections. The upper section is divided by the isolation plate into four identical areas with vertical sidewalls, eliminating the conditions for high-level powder to form a bridge arch at the axis. The bucket cone is equipped with a flow aid device, which has the beneficial effects of a flow aid device (as above) and has a dual flow aid function, solving the problem of poor material discharge from the source.

[0042] 5. The silo cone is equipped with a pressure box, which can directly measure the pressure of the powder material at the top to calculate the powder material level, and has the advantage of continuous measurement.

[0043] 6. Screw conveyors can use a shorter machine body, and in continuous batching processes, they have sensitive frequency conversion response and high metering accuracy.

[0044] 7. The dust collector is driven by a variable frequency fan, which can distribute air for dust removal according to different material feeding and discharging conditions, resulting in low energy consumption.

[0045] 8. Both A-type and B-type tubular flexible connectors adopt a gradually varying diameter, which solves the problem of material accumulation and sludge formation in traditional equal-diameter flexible connectors, thus affecting measurement accuracy.

[0046] In summary, this utility model effectively solves the problems of poor versatility, unstable operating conditions, and difficulties in equipment and material management of existing filling powder batching equipment. Attached Figure Description

[0047] Figure 1 This is a schematic diagram of the structure of this utility model (front view);

[0048] Figure 2 This is a schematic cross-sectional view of the structure AA of this utility model;

[0049] Figure 3 This is a schematic cross-sectional view of the structure BB of this utility model;

[0050] Figure 4 This is a schematic diagram of the flow aid device installed on the bin cone or bucket cone in this utility model;

[0051] Figure 5 This is a schematic diagram of the equipment used in implementing the continuous batching method based on a dual-set mine paste filling powder batching device according to this utility model.

[0052] In the diagram: 1. Silo top cover; 2. Dust collector; 3. Safety valve; 4. Feed pipe; 5. Silo cylinder; 6. Silo cone; 7. Flow aid device; 8. A. Pneumatic ball valve; 9. B. Pneumatic ball valve; 10. Breathing pipe; 11. C. Tubular flexible connection; 12. A. Pneumatic butterfly valve; 13. A. Tubular flexible connection; 14. Feed pipe; 15. Ear seat; 16. Weighing sensor; 17. Ring beam; 18. Bucket cone; 19. Bucket top cover; 20. Bucket cylinder; 21. B. Pneumatic butterfly valve; 22. 23. Tubular flexible connector; 24. Screw conveyor; 25. Silo support leg; 26. Pressure box; 27. Cylinder lug; 28. D pin; 29. ​​E pin; 30. Rake teeth; 31. Rectangular flange; 32. Rotary rake arm; 33. Extender connecting rod; 34. Rotary disc; 35. Torque-increasing connecting rod; 36. Drive cylinder; 37. Disc housing; 38. Rake arm lug; 39. A pin; 40. Fixed drive shaft; 41. Extender lug; 42. C pin; 43. B pin. Detailed Implementation

[0053] The present invention will be further described below with reference to the accompanying drawings and embodiments. Example 1

[0054] See Figures 1 to 5The mining paste filling powder batching device includes a silo 5, with a silo top cover 1 on the top of the silo 5. The silo top cover 1 is equipped with a dust collector 2 and a safety valve 3. A feed inlet is located at the top of the silo 5 and is connected to a feeding pipe 4. The bottom of the silo 5 is connected to the upper port of a cone 6. The lower port of the cone 6 is connected to one end of a feed pipe 14 via a pneumatic butterfly valve A 12 and a tubular flexible connection A 13. The other end of the feed pipe 14 is connected to the bucket of a bucket cylinder 20. The top cover 19, the bottom end of the bucket 20 is connected to the upper port of the bucket cone 18, and the lower port of the bucket cone 18 is connected to the feed port of the screw conveyor 23 through the B pneumatic butterfly valve 21 and the B tubular flexible connection 22; the mining paste filling powder batching device also includes a breathing pipe 10, one end of which is connected to the side of the feeding pipe 4 and the other end is connected to the opening of the bucket top cover 19; multiple flow aids 7 are provided on the cone wall of the bin cone 16 and the cone wall of the bucket cone 18.

[0055] The mining paste filling powder batching device also includes a silo support leg 24 that is arranged around the bottom side wall of the silo 5; a ring beam 17 is arranged around the upper part of the outer side of the bucket 20, and the outer side of the ring beam 17 is connected to the silo support leg 24; an ear seat 15 is provided on the outer side of the bucket 20, and a weighing sensor 16 is connected to the lower surface of the ear seat 15, and the weighing sensor 16 is also connected to the upper surface of the ring beam 17.

[0056] A pneumatic ball valve 8 is connected in series in the middle of the feeding pipe 4. One end of the breathing pipe 10 is connected to the feeding pipe 4 above the position of the pneumatic ball valve 8. A pneumatic ball valve 9 and a tubular flexible connection 11 are connected in series in the middle of the breathing pipe 10.

[0057] The flow-aiding device 7 includes a rectangular flange 30 with an orifice, a rotary rake arm 31, a range extender connecting rod 32, a rotary disk 33, a torque-increasing connecting rod 34, a drive cylinder 35, and two parallel disc shells 36. The upper front of the rectangular flange 30 is provided with a rake arm lug 37, which is hinged to the top of the rotary rake arm 31 via a pin A 38. The disc shell 36 is located on the lower back of the rectangular flange 30, and the bottom edge of the disc shell 36 is welded to the edge of the orifice of the rectangular flange 30. The rotary disk 33 is located between the two disc shells 36, and a fixed drive shaft 39 is provided at the center of the rotary disk 33. The two ends of the fixed drive shaft 39 are rotatably connected to the centers of the two disc shells 36, respectively. The rotary rake arm 31 has a range extender lug 40 at the center of its front side. The rotary disk 33 has a raised lug on its outer edge. The raised lug is hinged to one end of the range extender connecting rod 32 via a C-pin 41, and the other end of the range extender connecting rod 32 is hinged to the range extender lug 40 via a B-pin 42. The upper back of the rectangular flange 30 has a cylinder lug 26. The top of the drive cylinder 35 is hinged to the cylinder lug 26 via a D-pin 27. The actuator end of the drive cylinder 35 is hinged to one end of a torque-increasing connecting rod 34 via an E-pin 28, and the other end of the torque-increasing connecting rod 34 is fixedly connected to a fixed transmission shaft 39. The rotary rake arm 31 has rake teeth 29. The rotary rake arm 31 adopts a rectangular parallel double-plate structure. The double plates are provided with rake tooth mounting holes, and the rake teeth 29 are installed in the rake tooth mounting holes. The length of the rake teeth 29 is greater than the spacing between the parallel double plates. The rectangular flange 30 is installed on the outer side of the cone wall of the bin cone 6 and the outer side of the cone wall of the bucket cone 18. The rotary rake arm 31 is in the inner cavity of the bin cone 6 or the bucket cone 18. The upper part of the inner cavity of the bin cone 6 is provided with an isolation plate welded to the inner wall of the bin cone 6 or the bucket cone 18. The isolation plate divides the inner cavity of the bin cone 6 or the bucket cone 18 into four equal regions. The multiple flow aids 7 are evenly distributed in the four equal regions. The top edge of the isolation plate is flush with the top edge of the bin cone 6 or the bucket cone 18, and the bottom edge of the isolation plate is parallel to the bottom edge of the bin cone 6 or the bucket cone 18. The bottom end of the rotary rake arm 31 is lower than the bottom edge of the isolation plate.

[0058] Both the bin cone 6 and the bucket cone 18 are equipped with four flow aid devices 7, which are arranged at 90° intervals along the cone wall of the bin cone 6 or the cone wall of the bucket cone 18.

[0059] The angle between the center line of the flow aid device 7 and the plane of the adjacent isolation plate is 45°.

[0060] The isolation plate includes an isosceles trapezoidal plate and two right-angled trapezoidal plates. The waistline of the isosceles trapezoidal plate is welded to the inner wall of the silo cone 6 or the bucket cone 18. The oblique waistline of the right-angled trapezoidal plate is welded to the inner wall of the silo cone 6 or the bucket cone 18. The vertical waistline of the right-angled trapezoidal plate is welded to the isosceles trapezoidal plate. The two right-angled trapezoidal plates are on the same plane and perpendicular to the isosceles trapezoidal plate. A pressure box 25 is provided at the junction of the top edges of the isosceles trapezoidal plate and the right-angled trapezoidal plate inside the silo cone 6.

[0061] The disk housing 36 adopts a semi-circular volute structure; the rotary disk 36 is a single-plate solid circular disk structure; the drive cylinder 35 is a telescopic cylinder or a rotary cylinder.

[0062] The drive cylinder 35 is a pneumatic telescopic cylinder or a hydraulic telescopic cylinder.

[0063] The range extender 32 has a U-shaped tuning fork double-ear structure at one end and a single-hole ear handle structure at the other end. The shape of the range extender 32 is curved or straight. The distance between the two ends of the range extender 32 is greater than the vertical distance from the top of the range extender ear 40 to the reverse side of the rotary rake arm 31. The torsion extender 34 has a U-shaped tuning fork double-ear structure at one end and a single-hole ear handle structure at the other end. The shape of the torsion extender 34 is curved or straight. The distance between the two ends of the torsion extender 34 is greater than the radius of the rotary table 33.

[0064] The feed pipe 14 is a straight pipe of equal diameter, with a diameter larger than the diameter of pneumatic butterfly valve 12;

[0065] The screw conveyor 23 is driven by a variable frequency motor, and its inlet diameter is larger than that of the pneumatic butterfly valve 21.

[0066] The tubular flexible connector 13 has a gradually changing diameter. The smaller diameter end is equal to and connected to the diameter of the pneumatic butterfly valve 12 (A), and the larger diameter end is equal to and connected to the diameter of the feed pipe 14.

[0067] The tubular flexible connector 22 has a gradually changing diameter. The smaller diameter end is equal to and connected to the diameter of the B pneumatic butterfly valve 21, and the larger diameter end is equal to and connected to the diameter of the feed inlet of the screw conveyor 23.

[0068] The C-shaped flexible connector 11 is a body of equal diameter, and is equal in diameter to the pneumatic ball valve 9 and the breathing tube 10, respectively;

[0069] The aforementioned pneumatic ball valve 8 has the same diameter as the feed pipe 4;

[0070] The dust collector 2 is driven by a variable frequency fan. Example 2

[0071] The continuous batching method based on a dual-set mine paste filling powder batching device includes the following steps:

[0072] (1): Loading the silo: Close the B pneumatic ball valve and the A pneumatic butterfly valve, open the A pneumatic ball valve and start the dust collector. The external powder material is pneumatically conveyed into the silo space formed by the silo cylinder and the silo cone through the feeding pipe and the A pneumatic ball valve. The material height in the silo is monitored by the pressure box. Loading stops when the silo is full. Close the A pneumatic ball valve to complete the loading of the silo.

[0073] (2): Feeding material from the silo to the hopper: Close the B pneumatic butterfly valve, open the B pneumatic ball valve and the A pneumatic butterfly valve, and turn on the flow aid device located in the silo cone. The powder in the silo enters the hopper space formed by the hopper cylinder and the hopper cone through the A pneumatic butterfly valve, the A tubular flexible connection, and the feed pipe. The air in the hopper enters the silo cylinder through the breather pipe, the C tubular flexible connection, the B pneumatic ball valve, and the feed pipe, and is discharged through the dust collector. The weighing sensor monitors the weight of the powder in the hopper in real time. After the weight of the powder in the hopper reaches the set value, the A pneumatic butterfly valve and the flow aid device of the silo cone are closed, and the weight of the powder in the hopper is recorded as the initial value.

[0074] (3): Feeding material from the hopper: The feeding device starts the screw conveyor, opens the A pneumatic ball valve, the B pneumatic butterfly valve and the flow aid device located in the bucket cone. The powder in the hopper enters the feed port of the screw conveyor through the B pneumatic butterfly valve and the B tubular flexible connection, and is fed to the outside through the discharge port of the screw conveyor. External air enters from the lower port of the feed pipe, and enters the bucket cylinder through the A pneumatic ball valve, the B pneumatic ball valve, the breather pipe and the C tubular flexible connection to achieve air pressure balance inside and outside the hopper. The weighing sensor monitors the amount of powder reduction in the hopper in real time and calculates the real-time discharge capacity. By correcting the operating frequency of the drive motor of the screw conveyor in real time, the discharge capacity reaches the set feeding capacity and remains stable. When the weight of the remaining powder in the hopper reaches the set closing value, the screw conveyor, the B pneumatic butterfly valve and the flow aid device located in the bucket cone are closed. The weight of the powder in the hopper is recorded as the residual value. The difference between the initial value and the residual value is the actual discharge weight value. The actual discharge weight value is compared with the actual discharge time to obtain the average discharge capacity.

[0075] (4): When the first batching device finishes step (3), the second batching device starts to execute step (3) synchronously. The first batching device executes steps (1) and (2), and the second batching device executes steps (1) and (2) when step (3) ends. The two batching devices cycle in a cross-loop manner to achieve continuous batching. Example 3

[0076] The intermittent batching method based on a single set of mine paste filling powder batching device includes the following steps:

[0077] (1): Loading the silo: Close the B pneumatic ball valve and the A pneumatic butterfly valve, open the A pneumatic ball valve and start the dust collector. The external powder material is pneumatically conveyed through the loading pipe and the A pneumatic ball valve 8 into the silo space formed by the silo cylinder and the silo cone. The pressure of the pressure box is used to monitor the material height in the silo. Loading stops when the silo is full. Close the A pneumatic ball valve to complete the loading of the silo.

[0078] (2): Feeding material from the silo to the hopper: Close the B pneumatic butterfly valve, open the B pneumatic ball valve and the A pneumatic butterfly valve 12, and turn on the flow aid device on the silo cone. The powder in the silo enters the hopper space formed by the hopper cylinder and the hopper cone through the A pneumatic butterfly valve, the A tubular flexible connection, and the feed pipe 14. The air in the hopper enters the silo cylinder through the breather pipe, the C tubular flexible connection, the B pneumatic ball valve, and the feed pipe, and is discharged through the dust collector. The weighing sensor monitors the weight of the powder in the hopper in real time. After the weight of the powder in the hopper reaches the set value, the A pneumatic butterfly valve and the flow aid device of the silo cone are closed, and the weight of the powder in the hopper is recorded as the initial value.

[0079] (3): Feeding material from the hopper: The feeding device starts the screw conveyor, opens the A pneumatic ball valve, the B pneumatic butterfly valve and the flow aid device located in the bucket cone. The powder in the hopper enters the feed port of the screw conveyor through the B pneumatic butterfly valve 21 and the B tubular flexible connection, and is fed to the outside through the discharge port of the screw conveyor. The outside air enters through the lower port of the feed pipe, and enters the bucket cylinder through the A pneumatic ball valve, the B pneumatic ball valve, the breather pipe and the C tubular flexible connection to achieve the air pressure balance inside and outside the hopper. The weighing sensor monitors the amount of powder reduction in the hopper in real time. When the weight of the remaining powder in the hopper reaches the set closing value, the screw conveyor, the B pneumatic butterfly valve and the flow aid device located in the bucket cone are closed. The weight of the powder in the hopper is recorded as the residual value. The difference between the initial value and the residual value is the actual discharge weight value.

[0080] (4): Repeat steps (1) and (2) to achieve intermittent batching.

Claims

1. A powder batching device for filling paste in mines, characterized in that, The mining paste filling powder batching device includes a silo (5), a silo top cover (1) on the top of the silo (5), a dust collector (2) and a safety valve (3) on the silo top cover (1), a feed inlet on the upper part of the silo (5) connected to a feed pipe (4), and the bottom end of the silo (5) connected to the upper port of a cone (6); the lower port of the cone (6) is connected to one end of a feed pipe (14) via an A pneumatic butterfly valve (12) and an A tubular flexible connection (13), and the other end of the feed pipe (14) is connected to a bucket (20). The bucket top cover (19) is connected to the upper port of the bucket cone (18) at the bottom end of the bucket cylinder (20). The lower port of the bucket cone (18) is connected to the feed port of the screw conveyor (23) through the B pneumatic butterfly valve (21) and the B tubular flexible connection (22). The mining paste filling powder batching device also includes a breathing pipe (10). One end of the breathing pipe (10) is connected to the side of the feeding pipe (4), and the other end is connected to the opening of the bucket top cover (19). Multiple flow aids (7) are provided on the cone wall of the bin cone (6) and / or the cone wall of the bucket cone (18).

2. The mine paste filling powder batching device as described in claim 1, characterized in that, The mining paste filling powder batching device also includes a silo support leg (24) arranged around the bottom side wall of the silo (5); a ring beam (17) is arranged around the upper part of the outer side of the bucket (20), and the outer side of the ring beam (17) is connected to the silo support leg (24); an ear seat (15) is provided on the outer side of the bucket (20), and a weighing sensor (16) is connected to the lower surface of the ear seat (15), and the weighing sensor (16) is also connected to the upper surface of the ring beam (17).

3. The mine paste filling powder batching device as described in claim 1, characterized in that, The feeding pipe (4) is connected in series with a pneumatic ball valve (8) A. One end of the breathing pipe (10) is connected to the feeding pipe (4) above the position of the pneumatic ball valve (8). The breathing pipe (10) is connected in series with a pneumatic ball valve (9) B and a tubular flexible connection (11) C.

4. The mine paste filling powder batching device as described in claim 1, characterized in that, The flow aid device (7) includes a rectangular flange (30) with an orifice, a rotary rake arm (31), a range extender connecting rod (32), a rotary disk (33), a torque extender connecting rod (34), a drive cylinder (35), and two parallel disc shells (36). The upper front of the rectangular flange (30) is provided with a rake arm lug (37), which is hinged to the top of the rotary rake arm (31) via a pin (38). The disc shell (36) is located on the lower back of the rectangular flange (30), and the bottom edge of the disc shell (36) is welded to the edge of the orifice of the rectangular flange (30). The rotary disk (33) is located between the two disc shells (36), and a fixed drive shaft (39) is provided at the center of the rotary disk (33). The two ends of the fixed drive shaft (39) are rotatably connected to the centers of the two disc shells (36). The rotary rake arm (31) has a range extender lug (40) in the center of its front side, and the rotary disk (33) has a raised lug on the outer edge. The raised lug is hinged to one end of the range extender connecting rod (32) via a C-pin (41), and the other end of the range extender connecting rod (32) is hinged to the range extender lug (40) via a B-pin (42). The upper part of the back of the rectangular flange (30) has a cylinder lug (26). The top of the drive cylinder (35) is hinged to the cylinder lug (26) via a D-pin (27), and the actuating end of the drive cylinder (35) is hinged to one end of the torque-increasing connecting rod (34) via an E-pin (28). The other end of the torque-increasing connecting rod (34) is fixedly connected to the fixed transmission shaft (39). The rotary rake arm (31) has rake teeth (29). The rotary rake arm (31) adopts a rectangular long strip parallel double plate structure. The parallel double plates are provided with rake tooth mounting holes, and the rake teeth (29) are installed in the rake tooth mounting holes. The length of the rake teeth (29) is greater than the spacing between the parallel double plates. The rectangular flange (30) is installed on the outer side of the cone wall of the bin cone (6) and the outer side of the cone wall of the bucket cone (18). The rotary rake arm (31) is in the inner cavity of the bin cone (6) or the bucket cone (18). The upper part of the inner cavity of the bin cone (6) is provided with an isolation plate welded to the inner wall of the bin cone (6) or the bucket cone (18). The isolation plate divides the inner cavity of the bin cone (6) or the bucket cone (18) into four equal parts. The multiple flow aids (7) are evenly distributed in the four equal parts. The top edge of the isolation plate is flush with the top edge of the bin cone (6) or the bucket cone (18). The bottom edge of the isolation plate is parallel to the bottom edge of the bin cone (6) or the bucket cone (18). The bottom end of the rotary rake arm (31) is lower than the bottom edge of the isolation plate.

5. The mine paste filling powder batching device as described in claim 4, characterized in that, Both the bin cone (6) and the bucket cone (18) are equipped with four flow aid devices (7), which are arranged at 90° intervals along the cone wall of the bin cone (6) or the cone wall of the bucket cone (18).

6. The mine paste filling powder batching device as described in claim 5, characterized in that, The angle between the center line of the flow aid device (7) and the plane where the adjacent isolation plate is located is 45°.

7. The mine paste filling powder batching device as described in claim 6, characterized in that, The isolation plate includes an isosceles trapezoidal plate and two right trapezoidal plates. The waistline of the isosceles trapezoidal plate is welded to the inner wall of the silo cone (6) or the bucket cone (18). The oblique waistline of the right trapezoidal plate is welded to the inner wall of the silo cone (6) or the bucket cone (18). The vertical waistline of the right trapezoidal plate is welded to the isosceles trapezoidal plate. The two right trapezoidal plates are on the same plane and perpendicular to the isosceles trapezoidal plate. A pressure box (25) is provided at the junction of the top edges of the isosceles trapezoidal plate and the right trapezoidal plate inside the silo cone (6).

8. The mine paste filling powder batching device as described in claim 4, characterized in that, The disk housing (36) adopts a semi-circular volute structure; the rotary disk (33) is a single-plate solid circular disk structure; the drive cylinder (35) is a telescopic cylinder or a rotary cylinder.

9. The mine paste filling powder batching device as described in claim 8, characterized in that, The drive cylinder (35) is a pneumatic telescopic cylinder or a hydraulic telescopic cylinder.

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