Large-flow continuous stable adding system for cementing powder for tailing filling

Abstract

The utility model discloses a high-flow continuous and stable cementing powder adding system for tailing filling. A plurality of flow-aiding gas discs which are uniformly distributed in the circumferential direction are mounted on a conical cylinder of an ash bin. An annular air supply pipe which is arranged on the periphery of the conical cylinder in a surrounding mode and used for being externally connected with a high-pressure moisture removal air source is connected with the air inlet end of each flow-aiding air disc. And the lower port of the conical cylinder is connected with a star-shaped feeder through a hydraulic electric flashboard. A conveying auger and a metering auger located below the conveying auger are arranged below the star-shaped feeder. And the lower end of the star-shaped feeder is connected with a conveying auger through a discharging square cylinder with a flaring structure. And a rubber hose is connected between the blanking pipe of the conveying auger and the receiving pipe of the metering auger. The adding system further comprises a front end sensor and two rear end sensors. By means of the airflow blowing effect and the effects of the star-shaped feeder and the conveying screw, large-flow uniform and stable adding of the cementing powder for filling is achieved, the problem that the cementing powder is arched in the ash bin can be well solved, and smooth discharging of the cementing powder from the ash bin is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of cementitious material adding systems for mine filling, in particular to a kind of cementitious powder adding system for tailings filling. BACKGROUND

[0002] Due to many advantages in aspects of guaranteeing mining safety, improving resource recovery rate and realizing tailings quantization utilization, filling mining method is applied and concerned more and more. The technical key of filling mining method mainly lies in the mechanical properties of tailings cemented filling body. Tailings cemented filling body is formed by hardening of filling slurry prepared by water, cementitious material (cementitious powder) and tailings according to certain proportion. Therefore, sufficient and stable addition of cementitious powder is the prerequisite for obtaining high mechanical properties.

[0003] Due to the characteristics of large specific surface area and easy moisture absorption of cementitious powder, cementitious powder stored in ash bin is prone to hardening and arching. In actual production process of enterprise, a large amount of cementitious powder (such as 2-3 days' amount of cementitious powder) is usually loaded into ash bin at one time, which further aggravates the degree of cementitious powder hardening and arching, resulting in that cementitious powder is not smoothly discharged from ash bin, and cementitious powder is discontinuously and unstably added.

[0004] On the other hand, the existing cementitious powder adding and metering device usually adopts one-section metering scale, and when large flow of cementitious powder is added, there are problems of large fluctuation and unevenness of addition amount, which causes large metering error, waste of cementitious powder and other problems, not only increases the application cost of cementitious powder, but also affects the quality of cemented filling body.

[0005] The utility model discloses a CN218859856U discloses "a kind of glue solid powder filling unloader", for improving the rate of unloading, avoid the unloading process to occur jam, influence filling efficiency.Its main structure is: motor one, stirring rod, shaking hopper, vibration motor, moving block and shaking spring cooperate with each other, continuously stirring and shaking to glue solid powder when unloading, to increase the rate of unloading of glue solid powder, avoid the jam of glue solid powder unloading, influence filling efficiency;Through conveying pipeline, motor two, rotating roller, spiral blade and crushing tooth cooperate with each other, for avoiding the agglomeration of glue solid powder in the unloading process, influence filling effect.Its main disadvantage is, first, does not have the function of measurement;Second, when using, start motor one, motor two and vibration motor, motor one drives stirring rod to carry out stirring work to the glue solid powder in shaking hopper, vibration motor drives cam to rotate, cam props moving block to move up and down, so that shaking hopper shakes up and down, at the same time, shaking spring and connecting spring continuously stretch and shrink, so that the glue solid powder in shaking hopper falls into conveying pipeline, motor two drives rotating roller to rotate, so that glue solid powder is discharged from discharge port.Visibly, it designs too complex mechanical structure for realizing smooth discharge, not only leads to the increase of manufacturing and maintenance cost, but also causes electric energy waste, and the popularization and application value is lower. Utility model content

[0006] The utility model provides a tail sand filling glue solid powder large flow continuous stable adding system, realizes the even stable addition of glue solid powder large flow, reduces the fluctuation when adding glue solid powder large flow, improves the overall mechanical property of cemented filling body.

[0007] To solve the above technical problems, the utility model adopts the following technical scheme:

[0008] A tail sand filling glue solid powder large flow continuous stable adding system, including ash bin support and the ash bin for storing glue solid powder installed on ash bin support, the ash bin is composed of upper part cylindrical stock bin and the cone cylinder connected to the lower end of cylindrical stock bin, the airflow arch breaking mechanism is installed on the cone cylinder;The airflow arch breaking mechanism includes a plurality of flow assisting air dishes arranged uniformly in the circumference;The air inlet pipe of flow assisting air dish is located on the outside of cone cylinder, and the air outlet is located on the inside of cone cylinder;The airflow arch breaking mechanism further includes an annular gas supply pipe arranged around the outer periphery of the cone cylinder and used for connecting a high-pressure gas source;The annular gas supply pipe is connected to the air inlet end of each flow assisting air dish;The lower end of the cone cylinder is connected with a star feeder through a hydraulic electric gate;A conveying auger and a metering auger located below the conveying auger are arranged below the star feeder;A discharge square cylinder is connected to the lower end of the star feeder;The lower end of the discharge square cylinder is connected to the outer wall plate of the conveying auger;A discharging pipe is installed on the lower side of the discharge end of the conveying auger, and a receiving pipe is arranged at the inlet of the metering auger;An rubber hose is connected between the discharging pipe and the receiving pipe.

[0009] Preferably, the inner end of the metering auger is connected with a metering auger bracket, and the outer end is a hanging end.

[0010] Further preferably, the adding system further comprises a load cell; the load cell comprises one front sensor and two rear sensors, wherein the front sensor suspends the metering auger; the two rear sensors are respectively installed on the front and rear sides of the metering auger bracket; the one front sensor is suspended on the ash bin support through a sensor lifting rope, and the two rear sensors are respectively suspended on the auger support through sensor lifting ropes.

[0011] Preferably, the metering auger is connected with a material falling hose at the material falling end.

[0012] Preferably, a wear-resistant slip assisting plate is fixedly installed on the inner wall of the tapered cylinder.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] Firstly, the utility model realizes the arch breaking and large-flow uniform and stable adding of the glue setting powder by means of the airflow blowing and the star-shaped feeder and the conveying screw, and solves the arching problem of the glue setting powder in the ash bin and realizes the smooth discharge of the glue setting powder from the ash bin.

[0015] Secondly, the utility model optimizes the technical scheme, and the load cells are arranged at the front and rear ends of the metering auger, so that the accurate metering of the glue setting powder is realized conveniently.

[0016] Thirdly, the utility model expands the outlet of the star-shaped feeder, so that the material accumulation problem of the glue setting powder at the outlet of the star-shaped feeder is solved, and the fluctuation of the large-flow adding of the glue setting powder is reduced. Specifically, the outlet of the star-shaped feeder of the prior art is generally connected with the conveying screw through a pipeline, and the pipeline diameter is small due to the shape of the conveying screw, so that the material is easily accumulated. The lower end of the discharging square cylinder of the utility model has a wide-mouth structure matched with the conveying auger, and the wall plate of the discharging square cylinder is directly connected to the outer wall plate, so that the outlet is expanded and the material accumulation is prevented. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is the overall structure schematic view of the embodiment of the utility model.

[0018] EXPLANATION OF REFERENCE NUMERALS:

[0019] 1. ash bin; 2. wear-resistant slip sheet; 3. flow-aiding air dish; 4. hydraulic electric gate; 5. star feeder; 5-1. discharging square cylinder; 6. feeder bracket; 7. conveying auger; 8. rubber hose; 9. weighing sensor; 9-1. sensor hanging rope; 10. metering auger; 10-1. discharging hose; 11. third motor; 12. auger support; 13. metering auger bracket; 14. conveying auger bracket; 15. second motor; 16. first motor; 17. annular air supply pipe. DETAILED DESCRIPTION

[0020] The utility model will be explained in detail below in combination with the drawings and examples.

[0021] As Figure 1 , the embodiment of the utility model includes ash bin support (the ash bin support is omitted in the drawings) and ash bin 1 installed on the ash bin support and used for storing solidified powder. Generally, the volume of the ash bin 1 meets the solidified powder consumption for 2 to 3 days. The ash bin 1 is composed of an upper cylindrical bin and a conical cylinder connected to the lower end of the cylindrical bin. The conical cylinder is provided with an airflow arch breaking mechanism. The airflow arch breaking mechanism includes a plurality of flow-aiding air dishes 3 arranged uniformly in the circumferential direction, and the recommended number of flow-aiding air dishes 3 is six to eight. The flow-aiding air dishes in this embodiment are produced by Shanghai Chikong Automation Instrument Co., Ltd. The air inlet pipe of the flow-aiding air dish 3 is located on the outside of the conical cylinder, and the air outlet is located on the inside of the conical cylinder. The airflow arch breaking mechanism further includes an annular air supply pipe 17 arranged around the outer periphery of the conical cylinder. The annular air supply pipe 17 is connected to a high-pressure air source (such as a high-pressure fan) outside, and the high-pressure air source selects dry air after water removal. The annular air supply pipe 17 connects the air inlet pipes of each flow-aiding air dish 3 through a branch air pipe or directly connects the air inlet pipes of each flow-aiding air dish 3, and distributes high-pressure air to each flow-aiding air dish 3 for blowing and arch breaking.

[0022] Further, the inner wall of the conical cylinder is fixedly installed (generally fixedly connected by bolts) with a wear-resistant slip sheet 2, and the function of the wear-resistant slip sheet 2 is to ensure smooth sliding of the material. The rubber pad of the flow-aiding air dish 3 is attached to the inner side of the wear-resistant slip sheet 2.

[0023] The lower end of the conical cylinder is connected with a star feeder 5 through a hydraulic electric gate 4. The star feeder 5 is fixedly installed on the feeder bracket 6. The feeder bracket 6 is provided with a first motor 16 for driving the star feeder 5 to work, and the first motor 16 is in transmission connection with the power shaft of the star feeder 5 through a speed reducer and a shaft coupling. The star feeder 5 is preferably a double-feeding-wheel double-motor drive, which can realize remote individual frequency conversion control.

[0024] The embodiment also comprises an auger support 12 and a conveying auger 7 installed on the auger support 12 and below the star feeder 5. The auger support 12 is provided with a conveying auger bracket 14. The conveying auger bracket 14 is provided with a second motor 15 for driving the conveying auger 7 to work, which is in transmission connection with a power shaft of the conveying auger 7 through a speed reducer and a shaft coupling. The second motor 15 is preferably a variable frequency motor.

[0025] Specifically, the conveying auger 7 is generally installed on the auger support 12 in the following manner: one end (left end) is installed on the conveying auger bracket 14, and the other end (right end) is connected by a part of the auger support 12 where no conveying auger bracket is installed. Figure 1 Specifically, the conveying auger 7 is generally installed on the auger support 12 in the following manner: one end (left end) is installed on the conveying auger bracket 14, and the other end (right end) is connected by a part of the auger support 12 where no conveying auger bracket is installed. Figure 1 The lower end of the star feeder 5 is connected with a discharging square cylinder 5-1 having a flared structure.

[0026] Specifically, the upper end of the discharging square cylinder 5-1 is matched with the discharging end of the star feeder 5 and is bolted to the star feeder 5, and the lower end is matched with the conveying auger 7 and is connected to the outer wall plate of the conveying auger 7.

[0027] The embodiment also comprises a metering auger 10 below the conveying auger 7. The metering auger 10 is connected with a metering auger bracket 13 at the inner end and is supported by the metering auger bracket 13, and the outer end is a suspended end.

[0028] The metering auger bracket 13 is also provided with a third motor 11 for driving the metering auger 10 to work, which is in transmission connection with a power shaft of the metering auger 10 through a speed reducer and a shaft coupling. The metering auger 10 is a fixed frequency motor.

[0029] The discharging end of the conveying auger 7 is provided with a discharging pipe on the lower side, and correspondingly, the feeding end of the metering auger 10 is provided with a receiving pipe, and a rubber hose 8 made of rubber is connected between the discharging pipe and the receiving pipe. The discharging end of the metering auger 10 is connected with a discharging hose 10-1 made of plastic or cloth.

[0030] The embodiment also comprises a weighing sensor 9. The weighing sensor 9 comprises one front sensor and two rear sensors, wherein the front sensor suspends the metering auger 10. The two rear sensors are respectively installed on the front and rear sides of the metering auger bracket (13); the one front sensor is suspended on the ash bin support through a sensor hoisting rope (9-1), and the two rear sensors are respectively suspended on the auger support (12) through sensor hoisting ropes (9-1). Since the conveying auger 7 and the metering auger 10 are in soft connection, the metering auger bracket, the metering auger, and the power components and transmission components thereof are actually in a suspended state by the sensor 9.

[0031] The embodiment further comprises a controller which receives the data signal of the weighing sensor 9 and respectively controls the start and stop of the star feeder 5, the third motor 11, the second motor 15 and the first motor 16, adjusts the frequency of the star feeder 5 and the second motor 15, and realizes accurate metering.

[0032] The use method of the utility model is exemplified as follows: when adding the glue setting powder in large flow, the hydraulic electric gate valve 4 is opened first, then the third motor 11, the second motor 15 and the first motor 16 are opened in sequence, the frequency of the first motor 16 is controlled to make the glue setting powder in the ash bin 1 discharge uniformly and stably to the star feeder 5. The star feeder 5 continuously feeds the glue setting powder to the conveying auger 7 in sufficient amount. The conveying auger 7 delivers the glue setting powder to the metering auger 10 through the rubber hose 8. The metering auger 10 meters the glue setting powder. The controller adjusts the motor frequency of the conveying auger 7 and the star feeder 5 in real time according to the demand of the glue setting powder, so as to realize the on-demand addition of the glue setting powder. The glue setting powder is sent to the stirring barrel through the dropping hose 10-1. The metering auger 10 continuously and stably sends the glue setting powder into the stirring barrel, which is used to prepare the filling slurry with water and tailings in proportion. When the glue setting powder is not needed to be added after the filling work is completed, the hydraulic electric gate valve 4 is closed first, the star feeder 5 is emptied after 30 seconds, the first motor 16 is closed, the conveying auger 7 is emptied after 60 seconds, the second motor 15 is closed, the metering auger 10 is also emptied after 90 seconds, and finally the third motor 11 is closed.

Claims

1. A large-flow continuous stable addition system for cementing powder for tailings filling, comprising a lime bin support and a lime bin (1) installed on the lime bin support and used for storing cementing powder, the lime bin (1) is composed of an upper cylindrical bin and a conical cylinder connected to the lower end of the cylindrical bin, characterized in that: The conical cylinder is provided with an airflow arch breaking mechanism; the airflow arch breaking mechanism comprises a plurality of airflow assisting dishes (3) arranged uniformly in the circumferential direction; the air inlet pipe of the airflow assisting dish (3) is located on the outer side of the conical cylinder, and the air outlet is located on the inner side of the conical cylinder; the airflow arch breaking mechanism further comprises an annular air supply pipe (17) arranged around the outer periphery of the conical cylinder and used for externally connecting a high-pressure air source; the annular air supply pipe (17) is connected to the air inlet end of each airflow assisting dish (3); the lower end of the conical cylinder is connected with a star feeder (5) through a hydraulic electric gate (4); a conveying auger (7) and a metering auger (10) located below the conveying auger (7) are arranged below the star feeder (5); the star feeder (5) is connected with a discharging square cylinder (5-1) at the lower end; the lower end of the discharging square cylinder (5-1) is connected to the outer wall plate of the conveying auger (7); a discharging pipe is mounted on the lower side of the discharging end of the conveying auger (7), a receiving pipe is arranged at the feeding end of the metering auger (10), and a rubber hose (8) is connected between the discharging pipe and the receiving pipe.

2. The large-flow continuous and stable cement powder adding system for tailings filling according to claim 1, characterized in that: The metering auger (10) is connected with a metering auger bracket (13) at the inner end, and the outer end is a suspension end.

3. The large-flow continuous and stable cement powder adding system for tailings filling according to claim 2, characterized in that: The adding system further comprises a weighing sensor (9); the weighing sensor (9) comprises one front sensor and two rear sensors, wherein the front sensor suspends the metering auger (10); the two rear sensors are respectively mounted on the front and rear sides of the metering auger bracket (13); the one front sensor is suspended on the ash bin support through a sensor lifting rope (9-1), and the two rear sensors are respectively suspended on the auger support (12) through sensor lifting ropes (9-1).

4. The high-flow continuous and stable cement powder adding system for tailings filling according to claim 1 or 2 or 3, characterized in that: The discharging end of the metering auger (10) is connected with a discharging hose (10-1).

5. The high-flow continuous and stable cement powder adding system for tailings filling according to claim 1 or 2 or 3, characterized in that: A wear-resistant sliding assisting plate (2) is fixedly installed on the inner wall of the conical cylinder.

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