An online detection device and method for the dispersion of jig bed layers

Abstract

This invention discloses an online detection device and method for the dispersion of jigging machine bed layers. The device includes a bed compaction layer thickness and stroke measurement unit, a pressure control unit, a bed dispersion layer thickness and stroke measurement unit, a limit control unit, an overall control unit, and a frame. The method of this invention adopts a periodic detection approach, using a transformer to convert high-voltage electricity to low-voltage electricity, and a regulated power supply to power each module. The main control board controls the movement of a stepper motor through a motor driver, and calculates the stroke of the counterweight by the incremental rotation number of the electric screw. This invention can automatically calculate the thickness and dispersion of the jigging machine bed layers in real time, and can realize the mineral dispersion of the jigging machine, which has important guiding significance for optimizing jigging sorting indicators.

Description

Technical Field

[0001] This invention relates to an online detection device and method for the dispersion of jigging machine bed layers, which can automatically identify changes in the thickness and dispersion of jigging machine bed layers, and belongs to the field of mineral processing automation. Background Technology

[0002] A jig is a gravity separation device, and jigging is an important mineral processing method. The jig uses piston pulsation to create a pulsating, sawtooth-shaped flow of water within the jig tank. This causes the rising water flow to be faster than the falling water flow, with a shorter rising time and a longer falling time, enhancing the dispersion of the mineral bed and mitigating suction. The mineral material is evenly fed into the sawtooth-wave jig tank via an electromagnetic vibrating feeder. Under the action of the vertical alternating water flow, the minerals are re-stratified according to their specific gravity, allowing heavy mineral particles to settle sufficiently, thus improving the separation capacity and recovery rate of the equipment. This yields heavier minerals (concentrate) and lighter minerals (tailings). However, since changes in the mineral bed are not visible to the naked eye, the dispersion of the bed directly affects the size of the voids between particles and the changes in the forces acting on heavy mineral particles as they pass through the bed, thereby affecting various indicators of the concentrate and tailings.

[0003] When a jig is operating, the bed is in a discrete state under the pulsating action of water flow. Currently, due to limitations in the dispersion recognition capabilities of traditional jigs, it is impossible to effectively and promptly adjust the bed dispersion, resulting in poor mineral separation stability and reduced production efficiency. To better refine mineral processing techniques and adapt to increasingly sophisticated intelligent technologies, a density-based separation process, starting with bed dispersion detection, is being developed. This process is a crucial method in gravity separation within mineral processing. After multiple pulsations, the material undergoes numerous changes, and the bed transitions from instability to relative stability, ultimately achieving dynamic equilibrium—a complex and dynamic process. In actual production, accurately grasping the bed dispersion status is of significant guiding importance for separation indicators. Summary of the Invention

[0004] To overcome the shortcomings of existing jig level detection instruments that are not suitable for detecting the dispersion of jig bed layers, and to address the problems of relying on manual monitoring of jig bed layer dispersion in mineral processing production, which is difficult to observe, costly, labor-intensive, and untimely, this invention proposes an online jig bed layer dispersion detection device and method. This device can detect the thickness and dispersion of jig bed layers online in real time, replacing manual monitoring and providing a basis for operation or control in jig mineral processing production.

[0005] The technical solution of the present invention is as follows: an online detection device for the dispersion degree of a jig bed, characterized in that it includes a bed compaction layer thickness stroke measurement unit, a pressure control unit, a bed dispersion layer thickness stroke measurement unit, a limit control unit, an overall control unit, and a frame;

[0006] The bed compaction layer thickness travel measuring unit is used to measure the travel of the conical weight; the pressure control unit is used to measure the weight of the bed compaction layer thickness travel measuring unit and the bed dispersion layer thickness travel measuring unit; the bed dispersion layer thickness travel measuring unit is used to measure the travel of the bakelite board; the limit control unit is used to limit the travel of the conical weight and the bakelite board; the main control unit is used for data acquisition, component control and calculation; and the frame is used for component fixation and to provide overall support for the entire testing device.

[0007] The bed compaction layer thickness travel measurement unit includes a transformer, a regulated power supply, a motor driver, a stepper motor, a coupling, a screw, a nut plate, a connecting plate, a sleeve, a connecting rod, a conical weight, and an inner support. The inner support houses the transformer, the regulated power supply, the motor driver, and the stepper motor. The transformer is electrically connected to the regulated power supply, the regulated power supply is electrically connected to the motor driver, and the motor driver is electrically connected to the stepper motor. The transformer and the regulated power supply transmit a safe voltage, which drives the stepper motor to rotate. The output end of the stepper motor passes through the inner support and is connected to the screw through the coupling. The screw is connected to the sleeve through the nut plate and the connecting plate. One end of the connecting rod extends into the sleeve, and the other end of the connecting rod is fitted with a conical weight.

[0008] The pressure control unit includes a load cell, one end of which is fixed to the top of the inner support, and the other end of which is fixed to the outer support, which is the chassis.

[0009] The bed dispersion layer thickness measurement unit includes a sealed box, a sensor signal processing circuit, a circuit board, a mercury sensor, rubber, insulated wires, and a bakelite board. A stepper motor is fixed on the inner frame, and the output end of the stepper motor is connected to an electric screw through a coupling. A nut is connected by a limit rod. The sensor processing circuit is then encapsulated in the sealed box. The circuit board connects the sensor processing circuit and the mercury sensor to insulate them. The mercury sensor is waterproofed by wrapping it with rubber. The mercury sensor is connected to the bakelite board so that it contacts the bed medium to obtain the dispersion layer thickness.

[0010] The limit control unit includes an upper limit switch, a lower limit switch, and a limit rod. The upper limit switch and the lower limit switch are both installed inside the inner bracket, with the upper limit switch installed at the top of the inner frame and the lower limit switch installed at the bottom of the inner frame. A sealing box is installed at the lower end of the limit rod, the middle part of the limit rod is fixed to a connecting piece connected to the screw, and the other end of the limit rod is suspended between the upper limit switch and the lower limit switch to activate either the upper limit switch or the lower limit switch, thereby limiting the conical hammer.

[0011] The overall control unit includes a main control board, a touch screen, a regulated power supply module, a transformer module, a motor driver, and a chassis. The main control board, regulated power supply module, transformer module, and motor driver are all installed inside the chassis, and the touch screen is installed on the surface of the chassis. The motor driver and the touch screen are respectively connected to the main control board. The regulated power supply module is respectively connected to the transformer module and the motor driver. Then, the motor driver is connected to the stepper motor. The upper limit switch and the lower limit switch are respectively electrically connected to the main control board. The weighing sensor is electrically connected to the main control board.

[0012] This invention also provides a method for detecting the dispersion of a jig bed layer using an online detection device. The method for detecting the thickness and dispersion of the jig bed layer employs a periodic detection approach. The main control board controls the movement of a stepper motor via a motor driver and calculates the stroke of the conical weight and bakelite board based on the number of rotations of the electric screw. Simultaneously, a weighing sensor detects the weight change of the stroke measurement unit. When the bakelite board impacts the bed medium, it causes a horizontal change in the mercury sensor. The signal transmitted by the mercury sensor is processed by the sensor processing circuit, and the electrical signal is transmitted to the main control board, thereby calculating the dispersion layer thickness. When the conical weight descends and contacts the bed layer, and the change in gravity data exceeds a threshold, it is considered to have reached the upper surface of the bed layer, thus calculating the bed layer thickness. The specific method is as follows:

[0013] W11 The power module is divided into a transformer and a regulated power supply. The transformer converts the high voltage into an ideal voltage, and the regulated power supply then provides stable power to each module.

[0014] W12, the main control board controls the stepper motor movement through the motor driver;

[0015] W13. Due to the different diameters of the stepper motor and the electric screw, a coupling is required for connection.

[0016] W14. Under the action of the screw and the limit rod, the bakelite board and the conical hammer move downwards. Due to the action of the insulated wire and the rubber, the mercury sensor and the bakelite board will have offset space.

[0017] W15. When the bakelite board comes into contact with the stone medium, it will cause the mercury sensor to deflect. The mercury sensor signal is processed by the sensor signal processing circuit and transmitted to the main control board.

[0018] W16. When the bakelite board touches the slurry, it generates a force F1 that causes the mercury sensor to deflect horizontally at an angle of A1. Then, when the bakelite board touches the bed medium, it generates another force F2 that causes the mercury sensor to deflect horizontally again at an angle of A2. When the mercury sensor deflection ranges from A1 to A2, it is determined that the critical point of the dispersion layer has been reached, and the thickness of the dispersion layer can be calculated.

[0019] W17. The main control board controls the stepper motor to move again through the motor driver. When the conical hammer descends and contacts the bed, and the change in gravity data exceeds the threshold, it is considered to have reached the upper surface of the bed.

[0020] W18. After the measurement is completed, the main control board controls the stepper motor to move in reverse through the motor driver, so that the conical hammer returns to the upper limit position and waits for the next cycle of detection.

[0021] W19. One end of the limit rod is fixed to the connecting piece connected to the screw, and the other end is suspended between the upper limit switch and the lower limit switch, with the position of the conical weight when the limit rod just touches the upper limit switch as the base point.

[0022] W20. When the conical hammer just touches the screen of the jig, the limit rod just touches the lower limit switch. If the range of the limit rod exceeds the lower limit switch, an electrical signal will be transmitted to the main control board, thereby automatically disconnecting the circuit to protect the entire machine.

[0023] W21. Before W11~W18, a base plane is selected inside the jig. When the main control board controls the stepper motor to drive the screw down to the screen, the screen gives an upward force, which is then transmitted to the weighing sensor to calculate the maximum stroke H.

[0024] W22. Input the length X and width Y of the jig on the touch screen and pass them to the main control board; then repeat steps W12~W18.

[0025] W23. Calculate the stroke of the conical hammer and bakelite board by using the incremental number of rotations N of the screw and the pitch p. h=N1×p, dispersion layer thickness W=Hh=H-N1×p, l=(N1+N2)×p, bed thickness L=Hl=H-(N1+N2)×p, dispersion layer volume V=X×Y×W, bed thickness volume V=X×Y×L, then dispersion degree V=Vmin / Vbed;

[0026] W24. Finally, the dispersion and bed thickness are displayed on the touch screen. When the conical weight is at the base position, the incremental rotation number N=0.

[0027] W25. After the measurement is completed, the main control board controls the stepper motor to move in reverse through the motor driver, so that the conical hammer returns to the upper limit position and waits for the next cycle of detection.

[0028] The beneficial effects of this invention are:

[0029] (1) The present invention can realize online real-time detection of the thickness and dispersion of the jigging machine tool layer, thereby realizing precise control of jigging sorting and making invisible factors data-driven and visualized.

[0030] (2) The present invention can provide detection data on the thickness of the jig bed and the dispersion, which has a positive effect on stabilizing product quality and improving the recovery rate of useful minerals.

[0031] (3) This invention provides the necessary data to improve the automation and information technology level of jig beneficiation production, greatly saves labor and reduces the labor intensity of workers, and brings significant economic and social benefits to enterprises. Attached Figure Description

[0032] Figure 1 This is the control principle diagram of the present invention;

[0033] Figure 2 This is a structural diagram of the device of the present invention;

[0034] The labels in the diagram are as follows: 1—Touchscreen, 2—Main control board, 3—Weighing sensor, 4—Upper limit switch, 5—Transformer, 6—Regulated power supply, 7—Motor driver, 8—Stepper motor, 9—Limit rod, 10—Coupling, 11—Screw, 12—Nut piece, 13—Connecting piece, 14—Sleeve, 15—Connecting rod, 16—Conical weight, 17—Sensor signal processing circuit, 18—Sealed box, 19—Circuit board, 20—Mercury sensor, 21—Bakelite board, 22—Insulated wire, 23—Rubber, 24—Inner support, 25—Chassis, 26—Lower limit switch. Detailed Implementation

[0035] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. These embodiments are only used to specifically illustrate the present invention, and the scope of protection of the present invention is not limited to the content described.

[0036] Example 1: This example is applied to the online detection of the dispersion of the jig bed in tin ore recovery. The slurry concentration is about 25%, the copper grade of the feed is about 1%, the jig size is 750X550, the concentrate is collected, and the required Cu grade of the concentrate is 50%. The concentrate is used directly as the product.

[0037] The hardware selection in this embodiment is as follows: the main control board 2 adopts an STM32 touch screen all-in-one machine, model: MiniSTM32F103RCT6; the transformer 5 has the following specifications: input power 220V, output 24V; the load cell 3 adopts a cantilever load cell and uses an HX711AD conversion module, with a measurement range of 0-5kg; the voltage regulator 6 has the following specifications: input power 24V, output 12V, and outputs a DC signal to enable various circuits or electrical equipment to work normally under the rated operating voltage. The motor driver 7 is a TB6600, powered by 24VDC; the stepper motor 8 is a 42BYGH, with a torque of 0.28NM, a current of 1.5A, a length of 34mm, and a power supply of 24VDC; the upper limit switch 4 is a limit switch, model LXJM1-8108; the lower limit switch 7 is a limit switch, model LXJM1-8108; the coupling specifications are: outer diameter 14mm, length 22mm, inner hole 5mm*6mm; the touch screen 1 is a 4.0-inch SPI touch display with a resolution of 480*320; the small sealing box 18 is made of acrylic sheet, with dimensions of 40mm*40mm*25mm; the sensor signal processing circuit 17 has dimensions of 32mm*11mm*20mm; the circuit board 19 is a PCB circuit board. The dimensions of the inner frame are 45mm*45mm; the mercury sensor 20 uses a mercury tilt switch sensor module; the rubber 23 uses silicone to wrap and protect the mercury sensor; the dimensions of the bakelite board 21 are 45mm*45mm; the screw 11 has a diameter of 6mm and a pitch of 1mm; the nut plate 12 has a diameter of 20mm and a thickness of 5mm; the limit rod 9 has a length of 300mm, the connecting plate 13 has a diameter of 20mm and a thickness of 5mm; the sleeve 14 has an outer diameter of 25mm and a screw hole with a diameter of 8mm at the bottom; the connecting rod 15 has a diameter of 8mm and a screw at the top; the conical counterweight 16 has a bottom diameter of 25mm and a height of 30mm; the dimensions of the inner frame 24 are: length*height=460mm*460mm; the dimensions of the chassis are: 500mm*500mm*300mm.

[0038] This embodiment of an online detection device for the dispersion of a jig bed includes a bed compaction layer thickness travel measurement unit, a pressure control unit, a bed dispersion layer thickness travel measurement unit, a limit control unit, an overall control unit, and a frame. The bed compaction layer thickness travel measurement unit is used to measure the travel of a conical weight; the pressure control unit is used to measure the weight of the travel measurement unit; the bed dispersion layer thickness travel measurement unit is used to measure the travel of the bakelite board; the limit control unit is used to limit the travel of the conical weight and the bakelite board; the overall control unit is used for data acquisition, component control, and calculation; and the frame is used for component fixation and to provide overall support for the entire detection device.

[0039] The bed compaction layer thickness travel measurement unit includes a transformer 5, a regulated power supply 6, a motor driver 7, a stepper motor 8, a screw 11, a coupling 10, a nut plate 12, a connecting plate 13, a sleeve 14, a connecting rod 15, a conical weight 16, and an inner support 24. The inner support 24 houses the transformer 5, the regulated power supply 6, the motor driver 7, and the stepper motor 8. The transformer 5 is electrically connected to the regulated power supply 6, the regulated power supply 6 is electrically connected to the motor driver 7, and the motor driver 7 is electrically connected to the stepper motor 8. The transformer 5 and the regulated power supply 6 transmit a safe voltage, enabling the driver 7 to drive the stepper motor 8 to rotate. The output end of the stepper motor 8 extends out of the inner support 24 and is connected to the screw 11 through the coupling 10. The screw 11 is connected to the sleeve 14 through the nut plate 12 and the connecting plate 13. One end of the connecting rod 15 extends into the sleeve 14, and the other end of the connecting rod 15 is fitted with the conical weight 16.

[0040] The pressure control unit includes a load cell 3. One end of the load cell 3 is fixed to the top of the inner bracket 24, and the other end of the load cell 3 is fixed to the outer bracket, which is the chassis 25.

[0041] The bed dispersion layer thickness travel measurement unit includes a sealed box 18, a sensor signal processing circuit 17, a circuit board 19, a mercury sensor 20, and a bakelite board 21. The sealed box 18 is connected to the bottom of the limiting rod 9. The sensor signal processing circuit 17 is installed inside the sealed box 18. The bottom is separated from the mercury sensor 20 by the circuit board 19, and the circuit board 19 and the mercury sensor 20 are connected by wires 22, allowing the mercury sensor 20 to swing left and right. The surface of the mercury sensor 20 is wrapped with a layer of rubber 23 and connected to the bakelite board 21. The sensor processing circuit 17 is encapsulated by the sealed box 18. The circuit board 19 connects the sensor processing circuit 17 and the mercury sensor 20 to insulate them. The mercury sensor 20 is wrapped with rubber 23 to make it waterproof. The mercury sensor 20 is connected to the bakelite board 21 to contact the bed medium, thereby obtaining the dispersion layer thickness.

[0042] The limit control unit includes an upper limit switch 4, a lower limit switch 26, and a limit rod 9. The upper limit switch 4 and the lower limit switch 26 are both installed inside the inner bracket 24. The upper limit switch 4 is installed at the top of the inner frame 24, and the lower limit switch 26 is installed at the bottom of the inner bracket 24. The lower end of the limit rod 9 is fitted with a sealing box 18. The middle part of the limit rod 9 is fixed to the connecting piece 13 connected to the screw 11. The other end of the limit rod 9 is suspended between the upper limit switch 4 and the lower limit switch 26, and is used to activate the upper limit switch 4 or the lower limit switch 26 to limit the conical hammer 16.

[0043] The overall control unit includes a main control board 2, a touch screen 1, a regulated power supply module 6, a transformer module 5, a motor driver 7, and a chassis 25. The main control board 2, the regulated power supply module 6, the transformer module 5, and the motor driver 7 are all installed inside the chassis 25, and the touch screen 1 is installed on the surface of the chassis 25. The motor driver 7 and the touch screen 1 are respectively connected to the main control board 2. The regulated power supply module 6 is connected to the transformer module 5 and the motor driver 7 respectively. Then, the motor driver 7 is connected to the stepper motor 8. The upper limit switch 4 and the lower limit switch 26 are respectively electrically connected to the main control board 2. The weighing sensor 3 is electrically connected to the main control board 2.

[0044] This invention also provides a method for detecting the dispersion of a jig bed layer using an online detection device. The method for detecting the thickness and dispersion of the jig bed layer employs a periodic detection approach. The main control board 2 controls the movement of the stepper motor 8 via a motor driver 7, and calculates the stroke of the conical hammer 14 and the bakelite board 21 based on the number of rotations of the electric screw 11. Simultaneously, a weighing sensor 3 detects the weight change of the stroke measurement unit. When the bakelite board 21 impacts the bed medium, it causes a horizontal change in the mercury sensor 20. The sensor processing circuit 17 processes the signal transmitted by the mercury sensor 20 and transmits the electrical signal to the main control board 2, thereby calculating the dispersion layer thickness. When the conical hammer 14 descends and contacts the bed layer, and the change in gravity data exceeds a threshold, it is considered to have reached the upper surface of the bed layer, thus calculating the bed layer thickness. The specific method is as follows:

[0045] W11, the power module is divided into transformer 5 and voltage regulator 6. Transformer 5 converts the high voltage into an ideal voltage, and then voltage regulator 6 makes it output stably to power each module.

[0046] W12, the main control board 2 controls the movement of the stepper motor 8 through the motor driver 7;

[0047] W13. Since the stepper motor 7 and the electric screw 11 have different diameters, a coupling 10 is required for connection.

[0048] W14. Under the action of screw 11 and limit rod 9, bakelite board 21 and conical hammer 16 move downward. Due to the action of insulated wire 22 and rubber 23, mercury sensor 20 and bakelite board 21 will have offset space.

[0049] When W15 and bakelite board 21 come into contact with the stone medium, the mercury sensor 20 will shift. The signal from the mercury sensor 20 will be processed by the sensor signal processing circuit 17 and transmitted to the main control board 2.

[0050] When the bakelite board 21 touches the slurry, it generates a force F1 that causes the mercury sensor 21 to deflect horizontally at an angle of A1. Then, when the bakelite board 21 touches the bed medium, it generates another force F2 that causes the mercury sensor 21 to deflect horizontally again at an angle of A2. When the mercury sensor deflection ranges from A1 to A2, it is determined that the critical point of the dispersion layer has been reached, and the thickness of the dispersion layer can be calculated.

[0051] W17, the main control board 2 controls the stepper motor 8 to move again through the motor driver 7. When the conical hammer 16 descends and contacts the bed, and the change in gravity data exceeds the threshold, it is considered to have reached the upper surface of the bed.

[0052] W18. After the measurement is completed, the main control board 2 controls the stepper motor 8 to move in the reverse direction through the motor driver 7, so that the conical hammer 16 returns to the upper limit position and waits for the next cycle of detection.

[0053] W19, one end of the limit rod 9 is fixed on the connecting piece 13 connected to the screw 11, and the other end is suspended between the upper limit switch 4 and the lower limit switch 26, with the position of the conical hammer 16 when the limit rod 9 just touches the upper limit switch 4 as the base point;

[0054] W20. When the conical hammer 16 just touches the screen of the jig, the limit rod 9 just touches the lower limit switch 26. If the range of the limit rod 9 exceeds the lower limit switch 26, an electrical signal will be transmitted to the main control board 2, thereby automatically disconnecting the circuit to protect the entire machine.

[0055] W21. Before W11~W18, a base plane is selected inside the jig. When the main control board 2 controls the stepper motor 8 to drive the screw 11 down to the screen, the screen gives an upward force, which is then transmitted to the weighing sensor 3 to calculate the maximum stroke H.

[0056] W22. Input the length X and width Y of the jigging trough on the touch screen 1 and pass them to the main control board; then repeat steps W12~W18.

[0057] W23. Calculate the stroke of the conical hammer 16 and the bakelite board 21 by the incremental number of rotations N of the screw 11 and the pitch p. h=N1×p, the thickness of the dispersion layer W=Hh=H-N1×p, l=(N1+N2)×p, the thickness of the bed layer L=Hl=H-(N1+N2)×p, the volume of the dispersion layer V=X×Y×W, the volume of the bed layer thickness V=X×Y×L, then the dispersion degree V=Vmin / Vbed;

[0058] W24. Finally, the dispersion and bed thickness are displayed on the touch screen 1. When the conical weight 16 is at the base position, the incremental number of rotations N=0.

[0059] W25. After the measurement is completed, the main control board 2 controls the stepper motor 8 to move in the reverse direction through the motor driver 7, so that the conical hammer 16 returns to the upper limit position and waits for the next cycle of detection.

[0060] Example 2: This invention is applied to the online detection of the dispersion of the jig bed in tin ore recovery. The slurry concentration is about 25%, the tin grade of the feed ore is about 1.8%, the jig model is LTA70 / 2, and the concentrate is collected with a required SnO2 grade of 60%. The concentrate is used directly as the product.

[0061] The hardware selection in this embodiment is as follows: the main control board 2 adopts an STM32 touch screen all-in-one machine, model: MiniSTM32F103RCT6; the transformer 5 has the following specifications: input power 220V, output 24V; the load cell 3 adopts a cantilever load cell and uses an HX711AD conversion module, with a measurement range of 0-5kg; the voltage regulator 6 has the following specifications: input power 24V, output 12V, and outputs a DC signal to enable various circuits or electrical equipment to work normally under the rated operating voltage. The motor driver 7 is a TB6600, powered by 24VDC; the stepper motor 8 is a 42BYGH, with a torque of 0.28NM, a current of 1.5A, a length of 34mm, and a power supply of 24VDC; the upper limit switch 4 is a limit switch, model LXJM1-8108; the lower limit switch 7 is a limit switch, model LXJM1-8108; the coupling specifications are: outer diameter 14mm, length 22mm, inner hole 5mm*6mm; the touch screen 1 is a 4.0-inch SPI touch display with a resolution of 480*320; the small sealing box 18 is made of acrylic sheet, with dimensions of 40mm*40mm*25mm; the sensor signal processing circuit 17 has dimensions of 32mm*11mm*20mm; the circuit board 19 is a PCB circuit board. The dimensions of the inner frame are 45mm*45mm; the mercury sensor 20 uses a mercury tilt switch sensor module; the rubber 23 uses silicone to wrap and protect the mercury sensor; the dimensions of the bakelite board 21 are 45mm*45mm; the screw 11 has a diameter of 6mm and a pitch of 1mm; the nut plate 12 has a diameter of 20mm and a thickness of 5mm; the limit rod 9 has a length of 300mm, the connecting plate 13 has a diameter of 20mm and a thickness of 5mm; the sleeve 14 has an outer diameter of 25mm and a screw hole with a diameter of 8mm at the bottom; the connecting rod 15 has a diameter of 8mm and a screw at the top; the conical counterweight 16 has a bottom diameter of 25mm and a height of 30mm; the dimensions of the inner frame 24 are: length*height=460mm*460mm; the dimensions of the chassis are: 500mm*500mm*300mm.

[0062] The structure of the online detection device for the dispersion of jigging machine bed layers provided in this embodiment is the same as that in Embodiment 1.

[0063] The online detection method for the dispersion of the jig bed layer in this embodiment consists of a bed compaction layer thickness travel measurement unit, a pressure control unit, a bed dispersion layer thickness travel measurement unit, a limit control unit, an overall control unit, and a frame.

[0064] In this embodiment, p = 1 mm, the weight of the measuring unit and the limiting unit is 12 kg, and the threshold is 0.6 kg. In a certain measurement, before the experiment begins, a starting point H is selected. When the conical weight reaches the screen layer, N = 60, H = N * P = 60 * 1 = 60 mm. After the experiment begins, the length and width of the jig trough are X = 500 mm and Y = 400 mm, respectively. When the bakelite board first touches the bed medium, N = 18, and the loose thickness W = Hh = 60 - 18 * 1 = 42 mm. Subsequently, when the change in the gravity measurement value exceeds the threshold, N = 24, and the bed thickness L = Hl = 60 - 24 * 1 = 36 (mm). The volume of the dispersion layer V = X × Y × W = 500 * 400 * 42 = 8,400,000, and the volume of the bed thickness V = X × Y × L = 500 * 400 * 36 = 7,200,000. Therefore, the degree of dispersion V = Vdispersion / Vbed = 8,400,000 / 7,200,000 = 1.1667.

[0065] Example 3: This invention is applied to the online detection of the dispersion of the jig bed in coal mineral recovery. The slurry concentration is approximately 25%, the maximum particle size of the feed ore is 40mm, the jig model is JC1616-2, and the concentrate is collected with a required sulfur content of 2% and an ash content of 23.5%. The concentrate is used directly as the product.

[0066] The hardware selection in this embodiment is as follows: the main control board 2 adopts an STM32 touch screen all-in-one machine, model: MiniSTM32F103RCT6; the transformer 5 has the following specifications: input power 220V, output 24V; the load cell 3 adopts a cantilever load cell and uses an HX711AD conversion module, with a measurement range of 0-5kg; the voltage regulator 6 has the following specifications: input power 24V, output 12V, and outputs a DC signal to enable various circuits or electrical equipment to work normally under the rated operating voltage. The motor driver 7 is a TB6600, powered by 24VDC; the stepper motor 8 is a 42BYGH, with a torque of 0.28NM, a current of 1.5A, a length of 34mm, and a power supply of 24VDC; the upper limit switch 4 is a limit switch, model LXJM1-8108; the lower limit switch 7 is a limit switch, model LXJM1-8108; the coupling specifications are: outer diameter 14mm, length 22mm, inner hole 5mm*6mm; the touch screen 1 is a 4.0-inch SPI touch display with a resolution of 480*320; the small sealing box 18 is made of acrylic sheet, with dimensions of 40mm*40mm*25mm; the sensor signal processing circuit 17 has dimensions of 32mm*11mm*20mm; the circuit board 19 is a PCB circuit board. The dimensions of the inner frame are 45mm*45mm; the mercury sensor 20 uses a mercury tilt switch sensor module; the rubber 23 uses silicone to wrap and protect the mercury sensor; the dimensions of the bakelite board 21 are 45mm*45mm; the screw 11 has a diameter of 6mm and a pitch of 1mm; the nut plate 12 has a diameter of 20mm and a thickness of 5mm; the limit rod 9 has a length of 300mm, the connecting plate 13 has a diameter of 20mm and a thickness of 5mm; the sleeve 14 has an outer diameter of 25mm and a screw hole with a diameter of 8mm at the bottom; the connecting rod 15 has a diameter of 8mm and a screw at the top; the conical counterweight 16 has a bottom diameter of 25mm and a height of 30mm; the dimensions of the inner frame 24 are: length*height=460mm*460mm; the dimensions of the chassis are: 500mm*500mm*300mm.

[0067] The structure of the online detection device for the dispersion of jigging machine bed layers provided in this embodiment is the same as that in Embodiment 1.

[0068] The online detection method for the dispersion of the jig bed layer in this embodiment consists of a bed compaction layer thickness travel measurement unit, a pressure control unit, a bed dispersion layer thickness travel measurement unit, a limit control unit, an overall control unit, and a frame. The technical solutions of each technical module are the same as those in Embodiment 1.

[0069] In this embodiment, p = 1 mm, the weight of the measuring unit and the limiting unit is 12 kg, and the threshold is 0.6 kg. In a certain measurement, before the experiment begins, a starting point H is selected. When the conical weight reaches the screen layer, N = 75, H = N*P = 75*1 = 75 mm. After the experiment begins, the length and width of the jig trough are X = 300 mm and Y = 260 mm, respectively. When the bakelite board first touches the bed medium, N = 24, and the loose thickness W = Hh = 75 - 24*1 = 51 mm. Afterward, when the change in the gravity measurement value exceeds the threshold, N = 33, and the bed thickness L = Hl = 75 - 33*1 = 42 (mm). The volume of the dispersion layer V = X × Y × W = 300 * 260 * 51 = 3978000, and the volume of the bed thickness V = X × Y × L = 300 * 260 * 42 = 3276000. Therefore, the degree of dispersion V = Vdispersion / Vbed = 3978000 / 3276000 = 1.214.

[0070] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. An online detection device for the dispersion of a jig machine bed, characterized in that, It includes a bed compaction layer thickness travel measurement unit, a pressure control unit, a bed dispersion layer thickness travel measurement unit, a limit control unit, an overall control unit, and a frame; The bed compaction layer thickness travel measurement unit is used to measure the travel of the conical hammer (16), the pressure control unit is used to measure the weight of the bed compaction layer thickness travel measurement unit and the bed dispersion layer thickness travel measurement unit, the bed dispersion layer thickness travel measurement unit is used to measure the travel of the bakelite board (21), the limit control unit is used to limit the travel of the conical hammer (16) and the bakelite board (21), the total control unit is used for data acquisition, component control and calculation, and the frame is used for component fixation and to provide overall support for the entire detection device; The bed compaction layer thickness measurement unit includes a transformer (5), a regulated power supply (6), a motor driver (7), a stepper motor (8), a coupling (10), a screw (11), a nut plate (12), a connecting plate (13), a sleeve (14), a connecting rod (15), a conical counterweight (16), and an inner support (24). The inner support (24) is equipped with a transformer (5), a regulated power supply (6), a motor driver (7), and a stepper motor (8). The transformer (5) is electrically connected to the regulated power supply (6), and the regulated power supply (6) is electrically connected to the motor driver. The actuator (7) is electrically connected, the motor driver (7) is electrically connected to the stepper motor (8), and the safe voltage is transmitted by the transformer (5) and the regulated power supply (6) so that the driver (7) drives the stepper motor (8) to rotate. The output end of the stepper motor (8) passes through the inner bracket (24) and is connected to the screw (11) through the coupling (10). The screw (11) is connected to the sleeve (14) through the nut piece (12) and the connecting piece (13). One end of the connecting rod (15) extends into the sleeve (14), and the other end of the connecting rod (15) is equipped with a conical weight (16). The pressure control unit includes a load cell (3) and a housing (25); one end of the load cell (3) is fixed to the top of the inner bracket (24), and the other end of the load cell (3) is fixed to the housing (25); The bed dispersion layer thickness travel measurement unit includes a sealed box (18), a sensor signal processing circuit (17), a circuit board (19), a mercury sensor (20), rubber (23), an insulated wire (22), and a bakelite board (21). The sealed box (18) is connected to the bottom of the limiting rod (9). The sensor signal processing circuit (17) is installed inside the sealed box (18). The bottom is separated from the mercury sensor (20) by the circuit board (19). The circuit board (19) and the mercury sensor (20) are connected by the wire (22), so that the mercury sensor (20) has room to swing left and right. The surface of the mercury sensor (20) is covered with a layer of rubber (23) and connected to the bakelite board (21). The limit control unit includes an upper limit switch (4), a lower limit switch (26), and a limit rod (9). The upper limit switch (4) and the lower limit switch (26) are both installed inside the inner bracket (24). The upper limit switch (4) is installed at the top inside the inner frame (24), and the lower limit switch (26) is installed at the bottom inside the inner bracket (24). The lower end of the limit rod (9) is fitted with a sealing box (18). The middle part of the limit rod (9) is fixed on the connecting piece (13) connected to the screw (11). The other end of the limit rod (9) is suspended between the upper limit switch (4) and the lower limit switch (26) to trigger the upper limit switch (4) or the lower limit switch (26) to limit the conical hammer (16). The overall control unit includes a main control board (2) and a touch screen (1); the main control board (2) is installed inside the chassis (25), the touch screen (1) is installed on the surface of the chassis (25), the motor driver (7) and the weighing sensor (3) are electrically connected to the main control board (2) respectively, the motor driver (7) is electrically connected to the stepper motor (8), the upper limit switch (4) and the lower limit switch (26) are electrically connected to the main control board (2) respectively, and the touch screen (1) is electrically connected to the main control board (2).

2. The method for detecting the dispersion of jig machine bed layers using the online detection device according to claim 1, characterized in that, The method is as follows: W11, the power module is divided into a transformer (5) and a regulated power supply (6). The transformer (5) converts the high voltage into an ideal voltage, and the regulated power supply (6) then outputs it stably to power each module. W12, the main control board (2) controls the stepper motor (8) to move through the motor driver (7); W13. Since the stepper motor (8) and the electric screw (11) have different diameters, a coupling (10) is required for connection. W14. Under the action of the screw (11) and the limit rod (9), the bakelite board (21) and the conical hammer (16) move downward. Due to the action of the insulated wire (22) and the rubber (23), the mercury sensor (20) and the bakelite board (21) will have offset space. When W15 and the bakelite board (21) touch the stone medium, the mercury sensor (20) will be deflected. The signal of the mercury sensor (20) is processed by the sensor signal processing circuit (17) and transmitted to the main control board (2). W16. When the bakelite board (21) touches the slurry, it generates a force F1 that causes the mercury sensor (20) to deflect horizontally at an angle of A1. Then, when the bakelite board (21) touches the bed medium, it generates another force F2 that causes the mercury sensor (20) to deflect horizontally again at an angle of A2. When the mercury sensor (20) deflects between A1 and A2, it is determined that the critical point of the dispersion layer has been reached, and the thickness of the dispersion layer can be calculated. W17, the main control board (2) controls the stepper motor (8) to move again through the motor driver (7). When the conical hammer (16) descends and contacts the bed, and the change in gravity data exceeds the threshold, it is considered to have reached the upper surface of the bed. W18. After the measurement is completed, the main control board (2) controls the stepper motor (8) to move in the opposite direction through the motor driver (7), so that the conical hammer (16) returns to the upper limit position and waits for the next cycle of detection. W19, one end of the limit rod (9) is fixed on the connecting piece (13) connected to the screw (11), and the other end is suspended between the upper limit switch (4) and the lower limit switch (26), with the position of the conical hammer (16) when the limit rod (9) just touches the upper limit switch (4) as the base point; W20. When the conical hammer (16) just touches the screen of the jig, the limit rod (9) just touches the lower limit switch (26). If the range of the limit rod (9) exceeds the lower limit switch (26), the electrical signal will be transmitted to the main control board (2), thereby automatically disconnecting the circuit to protect the entire machine. W21. Before W11~W18, a base plane is selected inside the jig. When the main control board (2) controls the stepper motor (8) to drive the screw (11) down to the screen, the screen gives an upward force, which is then transmitted to the weighing sensor (3) to calculate the maximum stroke H. W22, Input the length X and width Y of the jigging trough on the touch screen (1) and pass it to the main control board; then repeat steps W12~W18; W23. Calculate the stroke of the conical hammer (16) and the bakelite board (21) by the incremental number of rotations N and the pitch p of the screw (11). h=N1×p, the thickness of the dispersion layer W=Hh=H-N1×p, l=(N1+N2)×p, the thickness of the bed layer L=Hl=H-(N1+N2)×p, the volume of the dispersion layer V=X×Y×W, the volume of the bed layer thickness V=X×Y×L, then the dispersion degree V=Vmin / Vbed; W24. Finally, the dispersion and bed thickness are displayed on the touch screen (1). When the conical weight (16) is at the base position, the incremental rotation number N = 0. W25. After the measurement is completed, the main control board (2) controls the stepper motor (8) to move in the opposite direction through the motor driver (7), so that the conical hammer (16) returns to the upper limit position and waits for the next cycle of detection.

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