CN204352833U - A kind of stirring system - Google Patents

Abstract

The utility model provides a mixing system, comprising a sand bin, a cement bin, a mixing bucket and a control device; the sand bin stores mortar; the mortar delivery pipeline connecting the sand bin and the mixing bucket has a first flowmeter capable of measuring the mortar flow; The cement silo stores cement; the cement delivery pipeline connecting the cement silo and the mixing tank has a cement conveyor and a weighing machine for measuring the amount of cement delivered; the mixing tank is used to mix and mix the mortar and cement to form filling material; the control device is respectively connected with the first flow rate The meter, the cement conveyor and the weighing machine are connected, and the actual lime-sand ratio is calculated according to the mortar flow measured by the first flow meter and the cement delivery volume measured by the weighing machine, and the working rate of the cement conveyor is controlled. The control device calculates the actual lime-sand ratio by measuring the material volume of the mortar conveying pipeline and cement conveying pipeline respectively through the first flowmeter and cement weighing machine, and compares it with the standard lime-sand quantity to obtain the lime-sand ratio adjustment data. Adjust the working speed of the water machine conveyor to realize the automatic control of the lime-sand ratio.

Description

a mixing system

technical field

The utility model relates to the technical field of mixing equipment, in particular to a stirring system.

Background technique

A large amount of tailings will be produced in the production of metal mines. If it cannot be used rationally, special tailings storage will need to be built, which will occupy a large amount of land. At the same time, underground mining will produce a large number of goafs. These goafs have hidden safety hazards and affect the follow-up of the mine. mining work. At present, more and more mines in China have begun to use cemented filling technology to fill goafs, realize mining and layer mining, reduce tailings emissions and reduce safety hazards caused by goafs. The cemented filling technology makes the tailings sand into tailing mortar, and uses the tailings mortar and cement to form cemented filling to recharge underground.

In order to meet the supporting force and effectively reduce the cost when backfilling the goaf, it is necessary to accurately control the concentration of cemented filling material and the ratio of lime to sand. In the prior art, the filling material mixing is mainly controlled by manual operation, which is extremely labor-intensive and cannot be controlled in real time to ensure the accuracy and stability of the filling mixing process.

Utility model content

The utility model provides a stirring system aiming at the problem in the prior art that manual control of the mixing ratio of the filling volume cannot be actually controlled.

The utility model provides a mixing system, comprising a sand bin, a cement bin, a mixing bucket and a control device; the sand bin stores mortar; the mortar delivery pipeline connecting the sand bin and the mixing bucket has a mortar flow rate measureable The first flowmeter; the cement silo stores cement; the cement delivery pipeline connecting the cement silo and the mixing bucket has a cement conveyor and a weighing machine for measuring the amount of cement delivery; the mixing bucket is used for mixing Mortar and cement form the filling material; the control device is respectively connected with the first flowmeter, the cement conveyor and the weighing machine, according to the mortar flow measured by the first flowmeter and the weighing machine The measured cement delivery rate calculates the actual lime-sand ratio, controls the working rate of the cement conveyor.

The control device calculates the actual lime-sand ratio by measuring the material volume of the mortar conveying pipeline and cement conveying pipeline respectively through the first flowmeter and cement weighing machine, and compares it with the standard lime-sand quantity to obtain the lime-sand ratio adjustment data. Adjust the working speed of the water machine conveyor to realize the automatic control of the lime-sand ratio.

Preferably, there is a first liquid level gauge for measuring the liquid level of the mixing tank in the mixing tank; the mortar conveying pipeline has a first gate valve for controlling the flow of the mortar; the control device is connected with the first liquid level respectively. The meter is connected to the first gate valve, and the opening of the first gate valve is controlled according to the liquid level of the mixing tank measured by the first liquid level meter.

Set the first liquid level gauge to monitor the liquid level of the filling material in the mixing tank, and control the opening of the first gate valve of the mortar conveying pipeline according to the actual liquid level, and then control the flow of mortar and cement to realize automatic flow control and coordinate the system All parts work.

Preferably, it also includes a first waterway connected to the mortar delivery pipeline; the first waterway has a second gate valve, a second flow meter and a first water pump; the mortar delivery pipeline has a device for measuring the amount of dry sand in the mortar The first concentration meter; the control device is respectively connected with the first concentration meter, the second gate valve and the second flow meter, and controls the second flow meter according to the amount of dry mortar measured by the first concentration meter. The opening and closing of the gate valve controls the working rate of the first water pump according to the dry sand amount of the mortar measured by the first concentration meter and the water flow measured by the second flow meter.

Due to factors such as mortar sedimentation, the ratio of tailings in the actual mortar may be quite different from the standard ratio. Setting the first waterway to inject water into the mortar conveying pipeline can facilitate the adjustment of the mortar water content in the mortar conveying pipeline.

Preferably, a second waterway is included; the second waterway has a third gate valve, a third flowmeter and a second water pump; the mixing tank has a second concentration meter for measuring the concentration of the filling material; the control device is connected with The second concentration meter, the third gate valve and the third flow meter are connected, the opening and closing of the third gate valve is controlled according to the concentration of the filling material measured by the second concentration meter, and the opening and closing of the third gate valve is controlled according to the second The concentration of the filling material measured by the concentration meter and the water flow measured by the third flow meter control the working rate of the second water pump.

When the concentration of the filling material in the mixing tank is too high, water can be injected into the mixing tank through the second water channel to adjust the concentration of the filling material.

Preferably, it includes a tailings conveying pipe connected to the sand bin; the tailings conveying pipe has a fourth gate valve and a mortar pump; the sand bin has a second liquid level gauge for measuring the liquid level of the mortar in the sand bin; the The control device is respectively connected with the second liquid level gauge, the fourth gate valve and the mortar pump, and controls the fourth gate valve and the mortar pump respectively according to the mortar liquid level measured by the second liquid level gauge opening and closing.

Set the second liquid level gauge to measure the liquid level in the sand bin, which can be fed back to the control device to control the tailings conveying pipeline to supply slurry to the sand bin or stop slurry supply.

Preferably, the sand bin has a cyclone at the top; the tailings conveying pipe is connected to the sand bin through the cyclone.

The cyclone is installed to spray the mortar in the tailings delivery pipe to the sand bin more evenly.

Preferably, the cement silo has a material level detector for detecting the cement material level; the material level detector feeds back the cement material level of the cement silo to the control device.

Setting up the material level detector in the cement plant can provide a warning of the remaining amount of cement to ensure that the system works reasonably and normally.

Preferably, the mixing tank has a fifth gate valve and a fourth flowmeter for measuring the discharge amount of the filler; the control device is respectively connected with the fifth gate valve and the third flowmeter, and according to the measurement of the third flowmeter The feeding amount of the filling material controls the opening degree of the fifth gate valve.

Through the automatic control of the amount of filling materials, it can be fed back to the control device to coordinate the work of the whole system, and realize the rapid adjustment of the system self-adaptation.

Description of drawings

Fig. 1 is a schematic diagram of the utility model embodiment one;

Fig. 2 is the schematic diagram of the second embodiment of the utility model;

Fig. 3 is the schematic diagram of the third embodiment of the utility model;

Fig. 4 is a schematic diagram of Embodiment 4 of the utility model.

Detailed ways

In order to enable those skilled in the art to better understand the solution of the utility model, the utility model will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

It should be noted that in the following embodiments, the transmission of materials is represented by lines without arrows, and the measurement signals and control signals are represented by lines with arrows.

Embodiment one:

Fig. 1 is a schematic diagram of Embodiment 1 of the utility model. As can be seen from FIG. 1 , the mixing system in this embodiment includes a sand bin 1 , a cement bin 2 , a mixing tank 3 , a control device 4 , and a mortar delivery pipeline 5 and a cement delivery pipeline 6 . The sand silo 1 stores mortar and is connected to the mixing tank 3 through a mortar delivery pipeline 5 ; the cement silo 2 stores cement and is connected to the mixing tank 3 through a cement delivery pipeline 6 . There is a first flow meter 51 in the mortar delivery pipeline 5, and the first flowmeter 51 can measure the mortar flow in the mortar delivery pipeline 5; The cement delivery pipeline 6 has a cement conveyor 61 and a weighing machine 62, and the cement conveyor 61 Used to drive the cement to be transported to the mixing tank 3 , the weighing machine 62 weighs the amount of cement entering the mixing tank 3 .

The first flow meter 51 , the cement conveyor 61 and the weighing machine 62 are respectively connected to the control device 4 . The standard lime-sand ratio (ie cement and mortar ratio) is stored in the control device 4 . The first flow meter 51 measures the mortar flow rate, the weighing machine 62 measures the cement volume and sends it to the control device 4; the control device 4 calculates the actual lime-sand ratio and compares it with the standard lime-sand ratio to obtain cement volume adjustment data to control the work of the cement conveyor rate, adjust the follow-up lime-sand ratio.

In this embodiment, the stirring device in the mixing tank 3 is driven by the motor to stir and mix the mortar and cement to form the filling material. The cement conveyor is a speed-regulating screw cement conveyor, and its working speed can be adjusted according to the control instructions of the control device, and then the amount of cement entering the mixing tank can be adjusted. The cement weighing machine of the present embodiment is a screw weighing feeder. Of course, the cement conveyor can also be other types of conveyors, and the weighing machine can also be other types of weighing equipment.

Embodiment two:

Fig. 2 is a schematic diagram of the second embodiment of the utility model. It can be seen from FIG. 2 that the difference between the second embodiment and the first embodiment is that a first liquid level gauge 31 is added to the mixing tank 3 , and a first gate valve 52 is added to the mortar conveying pipeline 5 . The first liquid level gauge 31 can measure the actual liquid level of the mixing tank and send it to the control device 4. The control device compares the actual liquid level of the mixing tank with the standard mixing tank liquid level to determine the amount of filling material in the mixing tank, and then controls the first gate valve 52 The opening degree controls the mortar flow rate of mortar conveying pipeline 5. Of course, the control device 4 will also adjust the conveying capacity of the cement conveyor accordingly to ensure the lime-sand ratio of the filling material.

In this embodiment, the first gate valve 52 is an electric pinch valve, which may also be other types of valve control components that can control the flow of mortar.

Embodiment three:

Fig. 3 is a schematic diagram of the third embodiment of the utility model. As can be seen from Fig. 3, the difference of embodiment three with respect to embodiment one: the first concentration meter 53 has been added in the mortar delivery pipeline 5 in the embodiment three, and the first concentration meter 53 connected with the mortar delivery pipeline 5 has been newly added. Waterway 7 ; the first waterway 7 has a second gate valve 71 , a second flow meter 72 and a second water pump 73 . Wherein the first concentration meter 53 can measure the actual mortar dry sand amount in the mortar delivery pipeline 5, and the second flow meter 72 can measure the water flow of the first waterway 7; The first concentration meter 53, the second flow meter 72 respectively The amount of dry sand and water flow are sent to the control device 4. The control device compares the actual amount of dry sand in the mortar with the standard amount of dry sand, and then controls the opening and closing of the second gate valve 71 and the working speed of the second water pump 73 to adjust the amount of mortar entering the mixing tank. water volume.

In this embodiment, the second gate valve 71 is directly connected to the first gate valve 52 . It should be noted that the purpose of the second waterway 7 is to change the water ratio of the mortar, so it can also be connected to any part of the mortar delivery pipeline 5 to inject regulated water into the mortar input pipeline 5 .

Embodiment four:

Fig. 4 is a schematic diagram of Embodiment 4 of the utility model. It can be seen from Fig. 4 that Embodiment 4 has all the components in Embodiment 1 to Embodiment 3. Therefore, no explanation will be given for the same parts thereof.

The mixing tank 3 in this embodiment has a second concentration meter 32, which is connected to the control device 4 and can measure the concentration of the filler in the mixing tank (ie, water content). The second waterway 8 connected with the mixing tank 3 has a third gate valve 81, a third flowmeter 82, and a second water pump 83; the third flowmeter 82 is connected with the control device 4, and can measure the water flow in the second waterway 8; control The device 4 can control the opening and closing of the third gate valve 81 and the working rate of the second water pump 83, adjust the working status of the third gate valve 81 and the second water pump according to the concentration of the filling material and the water flow measured by the third flow meter 82, and then adjust the filling The concentration of the material.

The mixing tank 3 in this embodiment is connected with the filling hopper, and the mixed filling material is supplied to the subsequent process through the filling hopper. There is a fourth flowmeter 33 and a fifth gate valve 34 at the outlet where the mixing bucket is connected with the filling hopper; both the fourth flowmeter 33 and the fifth gate valve 34 are connected to the control device 4; the control device 4 obtains the lower flow rate measured by the fourth flowmeter 33 The amount of material is compared with the standard amount of material used to control the opening and closing of the fifth gate valve 34.

In this embodiment, there is a second liquid level gauge 11 in the sand bin 1, and the second liquid level gauge 11 can measure the mortar liquid level in the sand bin 1 and transmit the mortar liquid level to the control device 4; , The tailings conveying pipe 9 capable of supplying mortar has a fourth gate valve 91 and a mortar pump 92 . The control device 4 controls the opening and closing of the fourth gate valve 91 and the mortar pump 92 according to the comparison result of the mortar liquid level measured by the second liquid level gauge 11 and the standard mortar liquid level, thereby ensuring a reasonable amount of mortar in the sand bin 1 .

The second liquid level gauge 11 in this embodiment is a weight level gauge, and the mortar liquid level can be judged by releasing the weight and sensing the change of gravity. The control device 4 can also perform upper and lower limit alarms according to the mortar level of the sand bin 1 to ensure a reasonable capacity of the sand bin. Of course, other detection devices for material level detection can also be used.

The sand bin in this embodiment has a cyclone 12 connected to the tailings conveying pipe 9 . Through the swirling effect of the cyclone 12, the mortar can flow to the sand bin more evenly.

The cement silo 2 in this embodiment also has a material level detector 21 to measure the amount of cement in the cement silo, which can prompt the cement filling operation. The cement conveying pipeline 6 in the present embodiment also has an arch breaking part, and if the cement feeding is not smooth, the arch breaking part can vibrate to assist blanking.

It should be noted that the various gate valves in this embodiment have different names according to their application scenarios and purposes, but they may be components with the same function. For example, the first gate valve 52 and the fifth gate valve 34 are all electric pinch valves in this embodiment, and of course other types of flow-adjustable valves can also be used; the second gate valve 71, the third gate valve 81 and the The fourth gate valve 91 plays the role of controlling the opening and closing of the pipeline, and can directly adopt a valve element only for opening and closing function.

In this embodiment, the first waterway 7 and the second waterway 8 can not only adjust the concentration of mortar and filler, but also clean the pipeline and the mixing tank 3 . The mixing system is also equipped with a filling hopper at the discharge port of the mixing tank 3, through which the mixing quality and mixing ratio of the actual filling material can be observed. Of course, the mortar conveying pipeline 5 in this embodiment and the first three embodiments all have pumping components, and the pumping components are used to drive the flow of mortar.

It should be noted that if the core components in this embodiment can work normally and ensure a reasonable amount of mortar, cement and water supply, some components may not be used, such as the first waterway 7, the second waterway 8 and the second liquid level Meter 11, cyclone 12, second concentration meter 32, fourth flow meter 33 and fifth gate valve 34; but considering the actual control accuracy and difficulty, it is recommended to set all of them.

It should also be noted that although only the valve body components shown in the figure are marked in Figure 4, in actual equipment, the mortar delivery pipeline 5, the tailings delivery pipeline 9, the first waterway 7, and the second waterway 8 And the discharge port of mixing drum 3 also has corresponding manual gate valve and electric gate valve, which are used to manually control the opening and closing of the pipeline, so as to ensure the safety and reliability of each automatic control valve connected to the control device 4 in the shutdown state.

The control device 4 in this embodiment includes a lower computer system that directly performs logic control on the equipment and an upper computer system that performs standard parameter setting. The lower computer system adopts the PLC control system, which can collect the measurement data of each monitoring component in real time and compare it with the standard data, and change the execution action of the execution unit in real time. The upper computer system has a man-machine interface, which can visually display the material flow of each pipeline and the working status of each equipment, which is convenient for the staff to judge. The upper computer system can also save and process data, generate report data, and provide powerful data explanation and analysis tools for system analysts and users.

In order to prevent system errors caused by the failure of the control device, a remote monitoring system is installed in the centralized control room in this embodiment, and a video camera is installed at the work site, especially a camera is installed at the observation port of the mixing tank to monitor the image of the work surface and the production site.

In practical application, the mixing system of this embodiment is provided with two sand bins to cooperate with a cement plant for material supply operation. After actual testing and inspection, the mixing system in this embodiment has reached the following performance indicators: the weight error of water and tailings ratio is within ±1%, the error of cement weighing is within ±1%, and the error of cumulative flow measurement of filling materials is within ±1%. within ±1%.

The embodiments of the stirring system provided by the utility model of the present invention have been introduced in detail above. It should be noted that the above embodiments are only used to help understand the core idea of the present utility model. For those of ordinary skill in the art, some improvements and modifications can be made to the present utility model without departing from the principle of the present utility model. , These improvements and modifications also fall within the scope of protection of the utility model claims.

Claims (8)

1. A stirring system, characterized in that: comprising a sand bin (1), a cement bin (2), a mixing tank (3) and a control device (4); The sand bin (1) stores mortar; The mortar conveying pipeline (5) connecting the sand bin (1) and the mixing tank (3) has a first flowmeter (51) capable of measuring the mortar flow; The cement silo (2) stores cement; The cement conveying pipeline (6) connecting the cement silo (2) and the mixing bucket (3) has a cement conveyer (61) and a weighing machine (62) for measuring the amount of cement conveyed; The mixing tank (3) is used for mixing and stirring mortar and cement to form filling materials; The control device (4) is respectively connected with the first flow meter (51), the cement conveyor (61) and the weighing machine (62), and according to the measured value of the first flow meter (51), The mortar flow rate and the cement delivery volume measured by the weighing machine (62) are used to calculate the actual lime-sand ratio and control the working rate of the cement conveyor (61). 2. The stirring system according to claim 1, characterized in that: The mixing tank (3) has a first liquid level gauge (31) for measuring the liquid level of the mixing tank; The mortar delivery pipeline (5) has a first gate valve (52) to control the flow of the mortar; The control device (4) is respectively connected with the first liquid level gauge (31) and the first gate valve (52), and controls the The opening degree of the first gate valve (52). 3. The stirring system according to claim 2, characterized in that: It also includes a first waterway (7) connected to the mortar delivery pipeline (5); The first waterway (7) has a second gate valve (71), a second flow meter (72) and a first water pump (73); The mortar delivery pipeline (5) has a first concentration meter (53) for measuring the amount of dry sand in the mortar; The control device (4) is respectively connected with the first concentration meter (53), the second gate valve (71) and the second flow meter (72), and is measured according to the first concentration meter (53). The amount of dry sand in the mortar controls the opening and closing of the second gate valve (71), and is controlled according to the amount of dry sand in the mortar measured by the first concentration meter (53) and the water flow measured by the second flow meter (72). Describe the working rate of the first water pump (73). 4. The stirring system according to claim 1, characterized in that: Also includes the second waterway (8); The second waterway (8) has a third gate valve (81), a third flow meter (82) and a second water pump (83); The mixing tank (3) has a second concentration meter (32) for measuring the concentration of the filler; The control device (4) is respectively connected with the second concentration meter (32), the third gate valve (81) and the third flow meter (82), and is measured according to the second concentration meter (32). The concentration of the filling material controls the opening and closing of the third gate valve (81), according to the concentration of the filling material measured by the second concentration meter (32) and the water flow measured by the third flow meter (82) The working rate of the second water pump (83) is controlled. 5. The mixing system according to claim 1, characterized in that: It also includes a tailings conveying pipe (9) connected to the sand bin (1); The tailings conveying pipe (9) has a fourth gate valve (91) and a mortar pump (92); The sand bin (1) has a second liquid level gauge (11) for measuring the liquid level of the mortar in the sand bin; The control device (4) is respectively connected with the second liquid level gauge (11), the fourth gate valve (91) and the mortar pump (92), and is measured according to the second liquid level gauge (11). The mortar liquid level controls the opening and closing of the fourth gate valve (91) and the mortar pump (92) respectively. 6. The stirring system according to claim 5, characterized in that: The sand bin (1) has a cyclone (12) at the top; The tailings conveying pipe (9) is connected with the sand bin (1) through the cyclone (12). 7. The stirring system according to claim 1, characterized in that: The cement silo (2) has a material level detector (21) for detecting the cement material level; The material level detector (21) feeds back the cement material level of the cement silo (2) to the control device (4). 8. The mixing system according to claim 1, characterized in that: The mixing tank (3) has a fifth gate valve (33) and a fourth flow meter (34) for measuring the discharge amount of the filler; The control device (4) is connected to the fifth gate valve (33) and the third flow meter (34) respectively, and controls the fifth gate valve according to the amount of filling materials measured by the third flow meter (34) (33) opening.