CN103983804A - Intelligent tracing ball in sorting process of whirlcone and method thereof - Google Patents

Abstract

An intelligent tracer ball and method for a hydrocyclone sorting process, especially suitable for research on coal mine processing and sorting. The tracer ball includes a spherical shell divided into upper and lower halves. A circuit fixing seat is arranged inside the spherical shell, and a tracer measurement circuit is fixed in the circuit fixing seat. The upper and lower hemisphere shells seal the spherical shell by setting screw plugs in the screw plug holes; The tracer ball is put into the cyclone containing the coal material. During the separation process of the cyclone, the intelligent tracer ball performs shearing and swirling motion together with the coal material, and records the three-axis acceleration data; the tracer ball and the material are weighed After being sorted by the mesocyclone, it is discharged together with a large amount of suspension and then enters the suspension recovery and purification system. The series of tracer balls after discharge are collected and sorted, and then classified and read data according to the discharge position, so as to obtain the coal material Diagram of motion trajectories of sieves in a swirling field. The structure and the method are simple, the efficiency is high, the operation is easy, and the tracing effect is good.

Description

Intelligent tracer ball and method for cyclone sorting process

technical field

The invention relates to a tracer ball and a method, and is especially suitable for a kind of intelligent tracer ball and the method used in the sorting process of a cyclone in the research of coal mine processing and sorting.

Background technique

The three-product dense medium cyclone is a kind of mineral separation equipment that has been vigorously developed and widely used in recent years. The ore particles and suspension are fed into the cylindrical part of the equipment along the tangential direction to form a strong swirling flow. The swirl field is a three-dimensional approximately axisymmetric multiphase flow field. The separation and sorting of the cyclone are all done through the relative motion of the dispersed phase and the continuous phase. Therefore, it is necessary to understand the movement characteristics of the dispersed phase. This has important guiding significance for production control and mismatch research.

Particle tracer measurement technology uses the image of tracer particles to represent the image of the flow field, and uses the measured particle motion to represent the motion of the material. If the selected tracer particles can correctly reflect the movement of the displayed dispersed phase, then the measured particle trajectory curve can be considered as the trajectory distribution of the measured dispersed phase. In the analysis and research on the movement of the cyclone, for the study of the movement of the dispersed phase, the settling velocity can be determined or deduced through experiments, and the equation of motion of the particles of the dispersed phase can also be established, but the equation is too complicated; Starting with the radial relative motion equation of the two phases, the motion characteristic time and trajectory equations of the dispersed phase are derived. However, these methods can only obtain numerical solutions under specific conditions; or deduce the formula about the movement time of dispersed phase particles, but the coefficients in the equation are actually functions of the dispersed phase particle velocity, so the solution will be very complicated.

Contents of the invention

Technical problem: The purpose of the present invention is to overcome the deficiencies in the prior art and provide a cyclone with simple structure, easy to use, which can record the movement track distribution of the dispersed phase of the material in the cyclone, and the distribution of light and heavy products is easy to monitor An intelligent tracer ball and a tracer method in the sorting process.

Technical solution: The intelligent tracer ball for the cyclone sorting process of the present invention includes a spherical shell composed of upper and lower halves snapped together, a circuit fixing seat is arranged in the lower half of the spherical shell, and a tracer measuring ball is fixed in the circuit fixing seat On the circuit board, a plurality of screw plug holes corresponding to the circuit fixing seats in the lower half body are opened on the upper body of the sphere shell, and screw plugs passing through the circuit fixing seats are respectively arranged in the plurality of screw plug holes, and the screw plugs are connected with the circuit fixing seats. The nut cooperates with the airtight spherical shell; the middle part of the upper half of the spherical shell is provided with a USB interface sealed by a sealing cover; the tracer measurement circuit board includes an inertial navigation module, a single-chip microcomputer module, a communication module connected in sequence, an inertial navigation module, a single-chip microcomputer module, The communication modules are respectively connected with the power supply.

The model of the single-chip microcomputer module is a CC2430 CMOS chip of TI company, the model of the inertial navigation module is ADXL345, and the model of the communication module is MAX232.

An intelligent tracer method for the cyclone sorting process using the above-mentioned tracer balls: first number the smart tracer balls for the multiple cyclone sorting processes, and number the numbered multiple cyclone sorting process The smart tracer ball is put into the cyclone with coal material, and the cyclone is started. During the sorting process of multiple cyclones, the smart tracer ball makes a strong shear swirl movement with the coal material, and records itself in real time. Three-axis acceleration motion data; cyclone sorting process intelligent tracer balls and coal materials are discharged together with a large amount of suspension after being sorted by a dense medium cyclone, and the discharged multiple cyclone sorting process is intelligently traced The balls are classified according to the discharge position, the data is read through the USB interface, and the motion characteristics of each group of data are analyzed by using MATLAB software, and the motion trajectory diagram of the coal material screened in the swirling field is obtained.

Beneficial effects: the present invention can realize the tracer research of the material movement trajectory, improve the visual monitoring ability of the distribution of the sports field, simplify the analysis process of the motion characteristics, and easily realize production control; the spherical shell of the tracer ball is made of wear-resistant and compression-resistant materials , the surface of the sphere is smooth, so that the sphere has good flow followability and dispersion, the production process is simple, no pollution, no energy consumption, and stable motion characteristics; there is a tracer measurement circuit inside the tracer ball, and the accelerometer in the tracer measurement circuit realizes The acquisition of triaxial acceleration data can measure the instantaneous flow field, axial velocity distribution, radial velocity distribution, and vorticity characteristics, and use MATLAB software to analyze the motion characteristics of each group of data through this data, and compare with the existing literature Trajectory research is compared, and finally the motion trajectory map in the swirl field is obtained. The test results not only have a further understanding of the strong shear swirl in the flow field, but also have important guiding significance for the distribution of light and heavy products in the cyclone and production control. It opens up a new way to study the trajectory of material movement, which is helpful to optimize the trajectory of material sorting. Its structure and method are simple, easy to operate, high in efficiency and wide in practicability.

Description of drawings

Fig. 1 is an outline view of the trace ball structure of the present invention.

Fig. 2 is a schematic diagram of the explosive structure of the tracer ball of the present invention.

Fig. 3 is a block diagram of the trace measurement circuit of the present invention.

Fig. 4 is a module diagram of the single-chip microcomputer of the present invention.

Fig. 5 is a block diagram of inertial navigation of the present invention.

In the figure: 1-screw plug hole; 2-sphere shell; 3-screw plug; 4-trace measurement circuit board; 5-circuit fixing seat; 6-washer.

Detailed ways

An embodiment of the present invention will be further described below in conjunction with accompanying drawing:

As shown in Fig. 1 and Fig. 2, the intelligent tracer ball of the hydrocyclone sorting process of the present invention comprises a sphere casing 2 divided into upper and lower halves. A trace measurement circuit board 4, a plurality of screw plug holes 1 are provided on the spherical shell 2, and the upper and lower hemispherical shells seal the spherical shell 2 by setting screw plugs 3 in the screw plug holes 1; the trace measurement circuit board 4 includes a sequence The connected inertial navigation module, single-chip microcomputer module, and communication module are connected to the power supply respectively. The model of the single-chip microcomputer module is a CC2430 CMOS chip of TI company, the model of the inertial navigation module is ADXL345, and the model of the communication module is MAX232.

As shown in Figure 2, the intelligent tracer method for the cyclone sorting process of the present invention: first number a plurality of cyclone sorting process intelligent tracer balls, and number the cyclone sorting process intelligent tracer balls Put it into the cyclone filled with coal materials, start the cyclone, and the intelligent tracer ball will make a strong shear swirl movement along with the coal material during the separation process of the cyclone. The upper end of the cylinder of the cyclone depends on the vacuum suction effect of the hollow column in the center of the cyclone and its own weight enters the sorting system of the dense medium cyclone along with the materials to be sorted, and the tracer ball records its own three-axis acceleration data in real time; After the intelligent tracer balls and materials are sorted by the dense medium cyclone, they are discharged together with the suspension and then enter the product recovery system, and the tracer balls are manually recovered on the product de-medium sieve. Collect the discharged intelligent tracer balls and classify them according to the discharge position, import the data collected by the tracer balls into the host computer through the USB interface to read the data, and use MATLAB software to analyze the motion characteristics of each group of data to obtain the material The movement trajectory diagram screened in the swirl field, according to the movement trajectory diagram, the swirler can be adjusted.

As shown in Figure 4, the model of single-chip microcomputer U1 in the figure is CC243. The four pins of single-chip microcomputer U1, P0_0, P0_1, P0_5, and P0_6, are respectively connected to the four pins of SDO, SDI, SCLK, and CS of the inertial navigation module to form SPI communication. Mode, the highest clock of SPI is 5MHz, the main MCU selects CS to set at the beginning of communication, and the communication ends when CS is reset, and SCLK is provided by the main MCU as the serial clock. SDI and SDO are serial data input and output, and they obtain data on the rising edge of the clock respectively. Reading the data collected by ADXL345 through SPI can only read 6 bytes of data continuously, and then the address returns to Ox32 to continue reading 6 bytes of data. Pin 7, pin 20 and pin 41 of the microcontroller U1 are connected to the power supply VCC, and the power supply VCC Capacitor C71 and capacitor C411 are connected in parallel, capacitor C71 and capacitor C411 are grounded, pin 19 and pin 21 of the microcontroller are connected in series with a crystal oscillator circuit, pin 22 is grounded through resistor R221, pin 23 is grounded through capacitor C231, and pin 24 is grounded through The capacity 241 is grounded, the pin 25 is connected to the power supply AVDD, the power supply is connected to the filter capacitor C251, the capacitor C251 is grounded, the pin 26 is grounded through the resistor R261, and the pin 27-pin 31 are connected in series with each other and connected to the power supply ADVV. Pin 35-pin 40 are connected in series with each other and connected to the power supply ADVV. Capacitor C281 and capacitor C351 are connected to the power supply ADVV. Capacitor C281 and capacitor C351 are grounded. Pin 41 is grounded through capacitor C421. Pin 43 is connected to pin 44. There is a crystal oscillator circuit.

Since RS232 is used to connect with the upper computer, it is necessary to use MAX232 to convert the RS232 level to TTL level. The four pins are connected. After importing the data collected by the tracer ball into the upper computer through the serial port, use MATLAB software to process each group of data. Firstly, the signal to be integrated is Fourier transformed, and then the transformed result is integrated in the frequency domain, and finally The integrated time domain signal is obtained by inverse Fourier transform. Comparing the obtained motion characteristic analysis results with the flow field and trajectory research in the existing literature, the trajectory diagram of particles in the swirling flow field is finally obtained.

As shown in Figure 5, U2 is ADXL, which is a high-sensitivity 3-axis acceleration sensor. The measurement of its acceleration depends on the resonance degree of the PCB. Therefore, it must be installed on a hard support position on the PCB. Under the fixed requirements, put several tracer balls into the cyclone after they are packaged intact. The tracer balls are placed on the upper end of the first-stage cyclone cylinder, relying on the vacuum suction effect of the hollow column in the center of the cyclone and the self-weight of the material to be sorted. Enter the dense medium cyclone sorting system. The tracer ball makes a strong shear swirl movement together with the material. During the whole process, the acquisition system in the ball completely stores the three-axis acceleration data of the tracer ball.

Pin 1 and pin 6 of acceleration sensor ADXL34 are connected through resistor R261, pin 1 is connected with power supply VCC and capacitor C211 respectively, capacitor C211 is grounded, pin 6 is connected with capacitor C262, capacitor C262 is grounded, pin 2 , pin 4 and pin 5 are grounded. 5 That is, during the motion process, ADXL345 saves the detected real-time three-axis data in six 8-bit registers Ox32-Ox37 according to the set data output frequency, registers Ox32 and Ox33 save the X-axis data, Ox34 and Ox35 save the Y-axis Data, Ox36 and Ox37 save the Z-axis data, the high bit comes after the low bit, and the output data is two’s complement. ADXL345 generates acceleration in three directions and converts it into an analog electrical signal through electronic induction. The analog electrical signal is converted into a digital electrical signal by ADC and stored in FIFO after digital filtering, waiting for the main controller to read from the I/O port through control and interrupt logic. Get the value of acceleration.

Claims (3)

1. An intelligent tracer ball for the cyclone sorting process, characterized in that it includes a spherical shell (2) composed of upper and lower halves snapped together, and a circuit fixing seat ( 5), the trace measurement circuit board (4) is fixed in the circuit fixing seat (5), and there are a plurality of screws corresponding to the circuit fixing seat (5) in the lower half body on the upper body of the spherical shell (2). Plug holes (1), a plurality of screw plug holes (1) are respectively provided with screw plugs (3) passing through the circuit fixing seat (5), and the screw plugs (3) cooperate with the nuts to seal the spherical shell (2); the spherical shell (2) The middle part of the upper body is provided with a USB interface sealed by a sealing cover; the tracer measurement circuit board includes an inertial navigation module, a single-chip microcomputer module, and a communication module connected in sequence, and the inertial navigation module, the single-chip microcomputer module, and the communication module are respectively connected to the power supply connected. 2. the cyclone sorting process intelligent tracer ball according to claim 1, is characterized in that: the model of described single-chip microcomputer module is CC2430 CMOS chip of TI company, and described inertial navigation module model is ADXL345, and described communication module The model is MAX232. 3. A cyclone sorting process intelligent tracing method using the tracer ball described in claim 1, is characterized in that: first a plurality of cyclone sorting process intelligent tracer balls are numbered, numbered During the sorting process of multiple cyclones, the intelligent tracer balls are put into the cyclone containing coal materials, and the cyclone is started, and the intelligent tracer balls are strongly sheared together with the coal materials during the sorting process of multiple cyclones. Cyclone movement, and real-time recording of its own three-axis acceleration motion data; during the cyclone sorting process, the intelligent tracer ball and coal materials are discharged together with a large amount of suspension after being sorted by the dense medium cyclone, and the discharged multiple cyclones are collected. The intelligent tracer ball in the sorting process of the flow device is classified according to the position of the discharge, the data is read through the USB interface, and the motion characteristics of each group of data are analyzed using MATLAB software, and the motion trajectory diagram of the coal material screened in the swirl field is obtained.