A gangue slurry concentration on-line detection and automatic adjustment method and system

Abstract

The present application relates to a kind of gangue slurry concentration on-line detection and automatic regulating method and system, the present application is by being set multiple detection nodes in interval in conveying pipeline along line, and control sensor array acquisition period is synchronized with slurry flow through fixed detection section time, realize the segmented detection of continuous slurry, according to the calculation overall average concentration and segregation coefficient, according to judging result, detection node executes regulation in situ, utilize slurry itself flow energy drive dry material adding mechanism to add dry material, by water injection unit, and using magnetic coupling driven stirring unit carries out adjustable mixing intensity;Corresponding system includes detection module and regulating execution module, regulating execution module is integrated with dry material adding unit, water supplement unit and mixing unit.The present application solves the problem of long-distance transportation regulation lag, object misplacement and segregation state difficult to quantify, realizes slurry concentration on-line detection and automatic regulation.

Description

Technical Field

[0001] This invention relates to the field of slurry concentration detection technology, and in particular to a method and system for online detection and automatic adjustment of gangue slurry concentration. Background Technology

[0002] During coal mining, coal gangue, as a byproduct of coal mining, is usually discharged to the surface as solid waste, forming gangue mountains unique to mining areas. Implementing fluidized bed backfilling for coal gangue can reduce its environmental pollution. Using coal gangue discharged from coal mines as the main aggregate for backfill is currently one of the most important backfilling methods. After crushing and grinding, the coal gangue is mixed with water and additives to form a slurry of a specific concentration, which is then transported to the goaf or abandoned space of the coal mine via slurry pipeline technology. While disposing of gangue, this method can effectively mitigate surface subsidence and the risk of spontaneous combustion in goaf areas created by roof cutting and roadway leaving. However, current research on coal gangue slurry backfilling is limited, especially on long-distance transportation of gangue slurry, which remains incomplete. Research on some issues is still lacking, severely restricting the development of slurry backfilling technology in the field of coal gangue solid waste disposal.

[0003] In underground coal mine backfilling, after crushing and slurry preparation, coal gangue needs to be pumped to the goaf through pipelines hundreds or even thousands of meters long. During long-distance transportation, the slurry is prone to segregation (i.e., uneven concentration) and deviation from the set value due to particle settling and moisture migration. This can lead to a surge in the risk of pipe blockage and unstable backfill quality. Existing technologies typically perform concentration detection at the end of the pipeline or at a single node and feed the signal back to the preparation station at the beginning for adjustment. Due to the long transportation distance and slow flow rate of the slurry, this detection and adjustment mode suffers from severe signal transmission and execution lag. By the time the adjustment action is finally executed, the detected slurry has already flowed past, resulting in inaccurate signal transmission and execution. The slurry being regulated is another slurry whose state may have changed, resulting in a complete misalignment between the detection and regulation targets, leading to poor control effects or even counterproductive results. In addition, existing concentration detection methods mostly use single or a small number of sensors installed on the pipe wall, and the measurement results are only the concentration at a local point in the pipe, which is difficult to fully reflect the true concentration distribution of the pipe cross-section (especially the central area), and even more difficult to capture the segregation phenomenon of thinner upper and thicker lower parts caused by particle settling. Due to the lack of effective quantitative indicators for slurry uniformity (such as the segregation coefficient), the control system is unable to determine whether there is a risk of settling, and can only make adjustments based on the potentially distorted average concentration signal, making it difficult to achieve true quality closed-loop control. Summary of the Invention

[0004] In view of the above problems, the present invention provides a method and system for online detection and automatic adjustment of gangue slurry concentration to solve the problems mentioned in the background art.

[0005] The specific technical solution is as follows: A method for online detection and automatic adjustment of gangue slurry concentration includes the following steps: S1. Repeat the following steps at multiple detection and adjustment points spaced apart along the extension direction of the conveying pipeline; S2. For the slurry flowing through the detection section corresponding to the current detection adjustment point, the concentration detection data of multiple spatial points are simultaneously acquired by the sensor array deployed in the detection section. S3. Based on all the concentration detection data obtained, calculate the overall average concentration of the gangue slurry in the detection section, and the segregation coefficient characterizing the degree of stratification of the gangue slurry; the segregation coefficient is calculated based on the difference between the average concentration of the sensor located on the lower side of the detection section and the average concentration of the sensor located on the upper side of the detection section, combined with the overall average concentration. S4. Compare the overall average concentration obtained from the detection section with the preset concentration target range to determine whether dry material or moisture needs to be added; at the same time, compare the segregation coefficient with the preset segregation coefficient target range to determine the degree of segregation. S5. Based on the judgment result, initiate the corresponding adjustment action on the spot to treat the slurry flowing through the detection section in real time. The adjustment action includes re-homogenizing the segregated slurry and / or adjusting the concentration of the slurry with abnormal concentration.

[0006] Furthermore, in step S5, the adjustment action performs the corresponding operation: When it is determined that dry material needs to be added, the preset amount of dry material is injected into the slurry downstream of the detection section; When it is determined that water needs to be added, a preset amount of water is injected into the slurry downstream of the detection section; The slurry after the injection of materials is mixed at a corresponding rate, depending on the degree of segregation and / or the amount of material added.

[0007] Furthermore, the specific steps for replenishing the dry material are as follows: A1. When the overall average concentration is determined to be less than the preset concentration target range, the controller calculates the preset amount of dry material to be added based on the difference between the two. A2. The controller controls the variable feeder to work. The variable feeder takes out a preset amount of dry material from the dry material storage bin and transports it to the dry material temporary storage bin. A3. A portion of the slurry is drawn from the downstream of the detection section to drive a water wheel to rotate. The rotational motion of the water wheel is converted into the reciprocating linear motion of the first piston through an eccentric wheel. The reciprocating motion of the first piston pumps the dry material in the dry material storage bin into the slurry.

[0008] Furthermore, the specific steps for replenishing water are as follows: B1. When the overall average concentration is determined to be greater than the preset concentration target range, the controller calculates the preset amount of water to be added based on the difference between the two. B2. The controller controls the water pump to work. Water in the water storage tank is pumped into the water replenishment unit through the water pump. Water is injected into the slurry by controlling the opening and closing of the water injection pipe on the water replenishment unit. The total amount of water replenished is monitored by the flow meter built into the water storage tank.

[0009] An online detection and automatic adjustment system for gangue slurry concentration includes multiple detection and adjustment points arranged in series at intervals along a conveying pipeline; each detection and adjustment point includes: The detection module includes a first tube and a sensor array installed inside it, used to acquire concentration data of the slurry flowing through it online and calculate the overall average concentration and segregation coefficient; The adjustment execution module, connected in series with the end of the detection module, is used to receive instructions and execute adjustment operations. It includes a second pipe body connected to the flange of the first pipe body, a dry material addition unit located at the connection between the first pipe body and the second pipe body, a water replenishment unit located at the inlet end of the second pipe body, and a mixing unit located in the second pipe body and downstream of the water replenishment unit. The dry material addition unit is used to add dry material to the slurry; the water replenishment unit is used to inject water into the slurry; and the mixing unit is used to stir and mix the slurry.

[0010] Furthermore, the sensor array includes several groups of detection units arranged at intervals along the axial direction of the first tube. Each group of detection units includes multiple first concentration sensors evenly distributed circumferentially on the inner wall of the first tube and a fixed rod disposed inside the first tube and extending radially. At least one second concentration sensor is disposed on the fixed rod near the middle position.

[0011] Furthermore, the fixing rod has a streamlined cross-section and is a cross-shaped support frame, with its end connected to the inner wall of the first tube. Several second concentration sensors are evenly distributed in a circumferential array at the center of the fixing rod.

[0012] Furthermore, the dry material adding unit includes: A V-shaped diversion pipe connects the first pipe body and the second pipe body. A water wheel driven by slurry is installed inside the V-shaped diversion pipe. The dry material adding mechanism includes a first cylinder, a first piston, a dry material temporary storage bin, and a feeding pipe; The transmission mechanism connects the drive shaft of the water turbine to the first piston, converting the rotational motion of the water turbine into the reciprocating motion of the first piston, so as to pump the dry material in the dry material storage bin into the interior of the V-shaped diversion pipe through the feeding pipe.

[0013] Furthermore, the transmission mechanism includes an eccentric wheel disposed on the end of the drive shaft, and a first connecting rod connecting the eccentric wheel and the first piston.

[0014] Furthermore, the water replenishment unit includes an annular water injection ring coaxially sleeved on the outside of the second pipe body. The inner ring of the annular water injection ring is provided with a plurality of water injection pipes communicating with the inside of the second pipe body along the circumferential direction, and a third solenoid valve is respectively provided in each water injection pipe.

[0015] Furthermore, the water pressure inside the annular water injection ring is greater than the pressure of the slurry flowing inside the second pipe.

[0016] Furthermore, the mixing unit includes a rotating shaft coaxially disposed within the second tube, a plurality of stirring rods disposed on the rotating shaft, a drive motor disposed on the outside of the second tube, and a magnetic coupling drive component connecting the drive motor and the rotating shaft.

[0017] Furthermore, the magnetic coupling drive includes a drive magnetic ring coaxially disposed on the outside of the second tube and a driven magnetic ring coaxially disposed on the rotating shaft. The drive magnetic ring is connected to the output shaft of the drive motor through a guide transmission component.

[0018] Furthermore, the guide transmission component includes two annular seats coaxially disposed on the outer side of the second tube body and an annular movable seat coaxially disposed between the two annular seats. Annular slide rails are coaxially provided on the side surfaces of the two annular seats that are close to each other. Multiple rollers adapted to the annular slide rails are respectively provided on the two sides of the annular movable seat. The driving magnetic ring is coaxially embedded in the inner ring wall of the annular movable seat. An external gear ring is coaxially disposed on the outer ring wall of the annular movable seat. A gear that meshes with the external gear ring is coaxially disposed on the output shaft of the drive motor.

[0019] Compared with the prior art, the present invention has the following beneficial effects: (1) The present invention provides an online detection and automatic adjustment method and system for gangue slurry concentration. By setting the sensor array acquisition cycle to the time it takes for the slurry to flow through a fixed detection section, the continuous slurry is segmented for detection. This ensures that each detection data packet corresponds strictly to a specific volume of slurry segment, so that subsequent adjustment actions can be accurately applied to that segment of slurry. This fundamentally eliminates the problems of adjustment lag and object misalignment caused by flow during long-distance transportation. At the same time, the use of a three-dimensional sensor array for high-density sampling can comprehensively perceive the concentration field of the pipeline section, and then calculate a more representative overall average concentration and segregation coefficient, providing a reliable data foundation that far exceeds traditional single-point detection. In addition, the method establishes a dual-index hierarchical decision-making mechanism based on concentration deviation and segregation degree, and adaptively matches the mixing intensity and deviation amount, realizing control from fine-tuning to strong intervention, and improving the system adjustment efficiency and overall stability.

[0020] (2) The present invention provides a method and system for online detection and automatic adjustment of gangue slurry concentration. The dry material addition unit adopts a slurry-driven material design. It drives the water turbine through a diversion part of the slurry, and converts the rotational motion into the reciprocating pumping motion of the first piston through the eccentric wheel and the first connecting rod, thereby injecting the dry material into the main stream. Its power comes from the slurry itself and does not rely on an external motor or air source, which improves the reliability in environments such as underground coal mines where power supply is limited or explosion-proof requirements are strict. At the same time, the dry material addition unit realizes the accurate metering of dry material through a variable feeder and the dry material addition mechanism realizes the conveying.

[0021] (3) The present invention provides an online detection and automatic adjustment method and system for gangue slurry concentration. By setting up an adjustment execution module, the functions of dry material addition, water replenishment and mixing are compactly integrated into the series pipe section. Together with the upstream detection module, it forms an integrated detection and adjustment standard station, which enables the slurry state information to be instantly converted into local adjustment instructions and completes closed-loop control in a very short process, laying a physical foundation for realizing distributed and rapid adjustment along the pipeline.

[0022] (4) The present invention provides an online detection and automatic adjustment method and system for gangue slurry concentration. By adding a pressurization unit and a feeding unit, it solves the problem that the direct driving force of the water turbine in the basic scheme may be insufficient. It can accumulate the weak and intermittent water turbine rotation power into a high-pressure gas source. The high-pressure gas is converted into a linear thrust that drives the fourth piston in the feeding unit, thereby realizing the amplification and conversion of power and ensuring reliable injection of dry material. Attached Figure Description

[0023] Figure 1 This is a flowchart of the method of the present invention.

[0024] Figure 2 This is a top view schematic diagram of the structure of the present invention.

[0025] Figure 3This is the present invention. Figure 2 Schematic diagram of section AA.

[0026] Figure 4 This is a schematic diagram of the dry material addition unit structure of the present invention.

[0027] Figure 5 This is a schematic diagram of the dry material addition mechanism of the present invention.

[0028] Figure 6 This is the present invention. Figure 2 Schematic diagram of cross-section at BB.

[0029] Figure 7 This is a schematic diagram of the hybrid unit structure of the present invention.

[0030] Figure 8 This is the present invention. Figure 7 A magnified view of part C.

[0031] Figure 9 This is a schematic diagram of the annular movable seat structure of the present invention.

[0032] Figure 10 This is a schematic diagram of the ring seat structure of the present invention.

[0033] Figure 11 This is a schematic diagram of the dry material addition unit structure in Embodiment 3 of the present invention.

[0034] Figure 12 This is a schematic diagram of the pressurization unit structure of the present invention.

[0035] Figure 13 This is a schematic diagram of the feeding unit structure of the present invention.

[0036] In the diagram: 1. Conveying pipe; 2. Detection module; 21. First pipe body; 22. First concentration sensor; 23. Second concentration sensor; 24. Fixed rod; 3. Adjustment and execution module; 31. Second pipe body; 321. V-shaped diverter pipe; 322. Water wheel; 323. Dry material adding mechanism; 324. First cylinder; 325. First piston; 326. Dry material temporary storage bin; 327. Feeding pipe; 328. Drive shaft; 329. Eccentric wheel; 3210. First connecting rod; 3211. Variable feeder; 33. Water replenishment unit; 331. Annular water injection ring; 332. Water injection pipe; 34. Mixing unit; 341. Rotating shaft; 342. Stirring rod; 343. Drive motor; 344. Magnetic coupling drive. Moving component; 3441, Annular seat; 3442, Annular movable seat; 3443, Annular slide rail; 3444, Roller; 3445, Drive magnetic ring; 3446, External gear ring; 3447, Driven magnetic ring; 3448, Gear; 4, Pressurizing unit; 41, Pressurizing cylinder; 42, Second piston; 43, First return spring; 44, Air outlet pipe; 45, Fourth solenoid valve; 5, Feeding unit; 50, Third cylinder; 51, Baffle plate; 52, Third piston; 53, Fourth piston; 54, Pressure chamber; 55, Pumping chamber; 56, Transmission rod; 57, L-shaped through hole; 58, Bellows; 59, Second return spring; 510, Fifth solenoid valve; 511, Sixth solenoid valve; 512, Seventh solenoid valve. Detailed Implementation

[0037] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings.

[0038] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0039] Example 1 This invention discloses an online detection and automatic adjustment method for gangue slurry concentration, referring to... Figure 1 This includes the following steps: S1. Repeat the following steps at multiple detection and adjustment points spaced apart along the extension direction of the conveying pipeline 1. S2. Segmented Online Detection: For the slurry flowing through the detection segment corresponding to the current detection adjustment point, the concentration detection data of multiple spatial points are simultaneously acquired by a sensor array deployed in the detection segment; S3. Concentration and Segregation Status Judgment: Based on all the acquired concentration detection data, calculate the overall average concentration of the gangue slurry in the detection section, as well as the segregation coefficient characterizing the degree of stratification of the gangue slurry; the segregation coefficient is calculated based on the difference between the average concentration of the sensor located on the lower side of the detection section and the average concentration of the sensor located on the upper side of the detection section, combined with the overall average concentration. S4. Adjustment Decision: Compare the overall average concentration obtained from the detection section with the preset concentration target range to determine whether dry material or moisture needs to be added; at the same time, compare the segregation coefficient with the preset segregation coefficient target range to determine the degree of segregation. S5. Material replenishment and mixing execution: Based on the judgment result, the corresponding adjustment action is initiated on-site to treat the slurry flowing through the detection section in real time. The adjustment action includes re-homogenization treatment of segregated slurry and / or concentration adjustment of slurry with abnormal concentration.

[0040] In step S2, the sensor array consists of multiple sets of detection units arranged at intervals along the axial direction of the first tube 21; each set of detection units includes several first concentration sensors 22 distributed circumferentially along the wall of the first tube 21, and several second concentration sensors 23 located radially inside the first tube 21; the section between the two sets of detection units furthest apart on the first tube 21 is the detection section; in this embodiment, reference... Figure 3 As shown, each detection unit is equipped with six first concentration sensors 22 and eight second concentration sensors 23. There are six detection units in total, comprising 84 sensors. The signal lines of all sensors are aggregated to a data processor. The data processor calculates the arithmetic mean of the concentration values ​​from all sensors within the same acquisition period to obtain the overall average concentration of the detection section. The acquisition period is the time taken for the gangue slurry to flow through the detection section. This involves dividing the continuously flowing gangue slurry into many detection sections of the same length as the detection section for individual detection. Each detection section is then adjusted, and this process is repeated cyclically to achieve concentration detection and adjustment of the entire gangue slurry. The high-density arrangement of the 84 sensors constructs a three-dimensional sensing network covering the circumferential and radial directions of the first pipe 21 cross-section. This network can capture subtle concentration differences between the center and sidewalls, and between the top and bottom of the first pipe 21, providing a data foundation for accurately calculating the overall average concentration and segregation coefficient.

[0041] In step S3, the horizontal plane where the axis of the first tube 21 is located is used as the dividing plane. The area below the dividing plane is the lower side of the detection section, and the area above the dividing plane is the upper side of the detection section. Taking the top of the first tube 21 as the starting angle, the six first concentration sensors 22 in each detection unit are distributed at 0°, 60°, 120°, 180°, 240°, and 300° in sequence, and the eight second concentration sensors 23 are distributed in pairs at 45°, 135°, 225°, and 315° in sequence. That is, in each detection unit, there are three first concentration sensors 22 and four second concentration sensors 23 located on the upper side of the detection section, and there are also three first concentration sensors 22 and four second concentration sensors 23 located on the lower side of the detection section.

[0042] In step S3, the segregation coefficient is calculated by dividing the average concentration of all sensors located on the lower side of the detection zone by the average concentration of all sensors located on the upper side of the detection zone by the overall average concentration.

[0043] Furthermore, in step S5, the adjustment action performs the corresponding operation: When it is determined that dry material needs to be added, the preset amount of dry material is injected into the slurry downstream of the detection section; When it is determined that water needs to be added, a preset amount of water is injected into the slurry downstream of the detection section; The slurry after the injection of materials is mixed at a corresponding rate, depending on the degree of segregation and / or the amount of material added.

[0044] Mixing speed, also known as stirring speed, is positively correlated with the degree of segregation and the amount of supplementary material. That is, when the degree of segregation is high and / or the amount of supplementary material is large, the stirring speed is fast; conversely, the stirring speed is slow.

[0045] Based on real-time detection and decision-making results, the data processor obtains three key input variables: dry material addition amount. (Unit: kg, preset amount calculated based on concentration deviation), water replenishment amount (Unit: kg, preset amount calculated based on concentration deviation), absolute value of segregation coefficient (Reflecting the degree of slurry stratification); then calculate the mixing strength setpoint. :

[0046] In the formula, and These are positive coefficients, pre-calibrated through experiments, representing the contribution weights of unit material addition and unit segregation degree to mixing requirements, respectively. The formula reflects the positive correlation principle that the more material added and the more severe the segregation, the greater the required mixing intensity.

[0047] Then, the mixing intensity setting value The stirring speed is adjusted by converting the signal into a control signal for the drive motor 343 through a linear mapping relationship. (Unit: rpm). The linear mapping relationship is as follows: In the formula, This is the minimum allowable stirring speed of the system. This is a proportionality coefficient (unit: rpm / mixing intensity unit). Empirical parameters obtained through experimental calibration and data fitting.

[0048] The data processor will target the rotational speed. The frequency is converted to the corresponding control frequency of the drive motor 343, which drives the magnetic coupling drive component 344 to make the stirring rod 342 rotate at the required speed. During this process, the system monitors the actual speed of the drive motor 343 in real time, forming a closed-loop control to ensure accurate and stable speed.

[0049] Furthermore, the specific steps for replenishing the dry material are as follows: A1. When the overall average concentration is determined to be less than the preset concentration target range, the controller calculates the preset amount of dry material to be added based on the difference between the two. A2. The controller controls the variable feeder 3211 to work. The variable feeder 3211 takes out a preset amount of dry material from the dry material storage bin and transports it to the dry material temporary storage bin 326. A3. A portion of the slurry is drawn from the downstream of the detection section to drive a water turbine 322 to rotate. The rotational motion of the water turbine 322 is converted into the reciprocating linear motion of the first piston 325 via an eccentric wheel 329. The reciprocating motion of the first piston 325 pumps the dry material in the dry material storage bin 326 into the slurry. When replenishing dry material, a small portion of the slurry diverted from the slurry section to be adjusted drives the water turbine 322, which in turn pumps the dry material into the main stream via the dry material adding mechanism 323. By using slurry to drive the material, there is no need for an external motor to drive the feeding pump, reducing energy consumption and improving applicability in situations where there is no reliable external power.

[0050] Furthermore, the specific steps for replenishing water are as follows: B1. When the overall average concentration is determined to be greater than the preset concentration target range, the controller calculates the preset amount of water to be added based on the difference between the two. B2. The controller controls the water pump to work. Water in the water storage tank is pumped into the water replenishment unit 33 by the water pump. Water is injected into the slurry by controlling the opening and closing of the water injection pipe 332 on the water replenishment unit 33. The total amount of water replenished is monitored by the flow meter built into the water storage tank.

[0051] The method of this invention divides a continuous slurry flow into independent detection segments based on the physical length and flow velocity of the detection zone. The slurry volume of each detection segment corresponds to the volume of the detection zone. The acquisition period of the sensor array is set to the time it takes for the slurry to flow through that segment. Data acquired by the sensors within the same acquisition period comes from the slurry of the same detection segment, thereby enabling the detection of a specific slurry segment and allowing subsequent adjustments to be precisely applied to that segment. This method not only focuses on whether the overall average concentration meets the standard, but also quantitatively monitors the degree of stratification through the segregation coefficient. Based on these two indicators: when the slurry concentration is abnormal (too high or too low), water or material replenishment is triggered; when the degree of segregation exceeds the standard, mixing is triggered or enhanced. The design of the mixing speed being positively correlated with the degree of segregation and the amount of material added achieves adaptive matching of the adjustment intensity.

[0052] Example 2 Based on Example 1, this invention discloses an online detection and automatic adjustment system for gangue slurry concentration, referring to... Figure 2 It includes multiple detection and adjustment points arranged in series at intervals along the conveying pipeline 1; each detection and adjustment point includes a detection module 2 and an adjustment execution module 3.

[0053] refer to Figure 2 and Figure 3 The detection module 2 includes a first tube 21 and a sensor array arranged inside it, used to acquire the concentration data of the slurry flowing through it online and calculate the overall average concentration and segregation coefficient; the first tube 21 serves as a detection chamber, and the second concentration sensor 23 supported by the fixing rod 24 inside it together with the first concentration sensor 22 on the wall of the first tube 21 form a sensor array. When the slurry flows through it, the array collects data from all directions and sends it to the processor to complete the concentration field calculation.

[0054] refer to Figure 2 The adjustment execution module 3 is connected in series with the end of the detection module 2, and is used to receive instructions and execute adjustment operations. The adjustment operations include adding water, adding materials, and mixing operations. The adjustment execution module 3 includes a second pipe body 31 connected to the flange of the first pipe body 21, a dry material adding unit located at the connection between the first pipe body 21 and the second pipe body 31, a water replenishment unit 33 located at the inlet end of the second pipe body 31, and a mixing unit 34 located inside the second pipe body 31 and downstream of the water replenishment unit 33. The dry material adding unit is used to add dry materials to the slurry; the water replenishment unit 33 is used to inject water into the slurry; and the mixing unit 34 is used to stir and mix the slurry.

[0055] Furthermore, as a specific implementation method, refer to Figure 2 and Figure 3The sensor array includes several sets of detection units arranged at intervals along the axial direction of the first tube 21. Each set of detection units includes multiple first concentration sensors 22 that are circumferentially distributed on the inner wall of the first tube 21 and a fixing rod 24 that is disposed inside the first tube 21 and extends radially. At least one second concentration sensor 23 is disposed on the fixing rod 24 near the middle position.

[0056] The fixing rod 24 has a streamlined cross section and is a cross-shaped support frame. Its end is connected to the inner wall of the first tube 21. Several second concentration sensors 23 are evenly distributed in a circumferential array at the center of the fixing rod 24.

[0057] Furthermore, as a specific implementation method, refer to Figure 2 , Figure 4 and Figure 5 The dry material adding unit includes: V-shaped diversion pipe 321 connects the first pipe body 21 and the second pipe body 31. A water wheel 322 driven to rotate by the slurry is provided inside the V-shaped diversion pipe 321. The dry material adding mechanism 323 includes a first cylinder 324, a first piston 325, a dry material temporary storage bin 326, and a feeding pipe 327; The transmission mechanism connects the drive shaft 328 of the water turbine 322 to the first piston 325, converting the rotational motion of the water turbine 322 into the reciprocating motion of the first piston 325, so as to pump the dry material in the dry material storage bin 326 into the interior of the V-shaped diversion pipe 321 through the feeding pipe 327.

[0058] The transmission mechanism includes an eccentric wheel 329 disposed on the end of the drive shaft 328, and a first connecting rod 3210 connecting the eccentric wheel 329 and the first piston 325.

[0059] The dry material adding mechanism 323 also includes a variable feeder 3211 and a dry material storage bin; the variable feeder 3211 is a screw feeder driven by a variable frequency motor, the inlet of the variable feeder 3211 is connected to the outlet of the dry material storage bin, and the outlet of the variable feeder 3211 is connected to the inlet of the dry material temporary storage bin 326.

[0060] Most of the slurry flows from the first pipe 21 into the second pipe 31, and a small portion of the slurry flows into the second pipe 31 again after passing through the V-shaped diversion pipe 321. The slurry flowing through the V-shaped diversion pipe 321 can drive the water wheel 322 to rotate. One end of the drive shaft 328 of the water wheel 322 extends out, and its end is provided with an eccentric wheel 329. The eccentric wheel 329 is hinged to the first piston 325 of the dry material adding mechanism 323 through the first connecting rod 3210. The first piston 325 is adapted to the first cylinder 324. The upper part of the first cylinder 324 is provided with a first connecting port, which is connected to the outlet of the dry material temporary storage bin 326 through a first solenoid valve. The lower part of the first cylinder 324 is provided with a second connecting port, which is connected to one end of the feeding pipe 327 through a second solenoid valve. The other end of the feeding pipe 327 is connected to the V-shaped diversion pipe 321, and the feeding pipe 327... The flow direction of 27 forms an acute angle with the flow direction at the connection of the V-shaped diverter pipe 321. According to the instructions of the data processor, the variable feeder 3211 pre-transports the required dry material from the dry material storage bin to the dry material temporary storage bin 326. When the water wheel 322 is driven to rotate by the slurry, the first piston 325 is driven to reciprocate through the eccentric wheel 329 and the first connecting rod 3210. With the opening and closing control of the first solenoid valve and the second solenoid valve, the dry material in the dry material temporary storage bin 326 is sucked into the first cylinder 324 and pumped into the V-shaped diverter pipe 321. Then, it is carried into the second pipe 31 by the slurry to participate in the subsequent mixing. The dry material is injected into the V-shaped diverter pipe 321 at an acute angle to the mainstream, which can be quickly carried away and dispersed. This ensures the addition accuracy and minimizes the interference and pressure loss on the mainstream slurry flow, achieving low-disturbance material replenishment.

[0061] Furthermore, as a specific implementation method, refer to Figure 2 and Figure 6 The water replenishment unit 33 includes an annular water injection ring 331 coaxially sleeved on the outside of the second pipe body 31. The inner ring of the annular water injection ring 331 is provided with a plurality of water injection pipes 332 communicating with the inside of the second pipe body 31 along the circumferential direction. Each water injection pipe 332 is provided with a third solenoid valve.

[0062] The water replenishment unit 33 also includes a water storage tank and a water pump. The inlet of the water pump is connected to the lower end of the water storage tank via a flow meter, and the outlet of the water pump is connected to the annular water injection ring 331. A pressure sensor is also installed inside the annular water injection ring 331, and the water pressure inside the annular water injection ring 331 is greater than the pressure of the slurry flowing inside the second pipe body 31. The controller controls the operation of the water pump, and the water in the water storage tank is pumped into the annular water injection ring 331. All third solenoid valves are controlled by the controller. When water replenishment is needed, the controller opens the third solenoid valve, and the water flows through the water injection pipe 332 in the form of a fine jet into the slurry inside the second pipe body 31. The total water replenishment volume is monitored by the flow meter.

[0063] Furthermore, as a specific implementation method, refer to Figure 2 and Figure 7 The mixing unit 34 includes a rotating shaft 341 coaxially disposed inside the second tube 31, a plurality of stirring rods 342 disposed on the rotating shaft 341, a drive motor 343 disposed on the outside of the second tube 31, and a magnetic coupling drive component 344 connecting the drive motor 343 and the rotating shaft 341; the two ends of the rotating shaft 341 are respectively connected to the inner wall of the second tube 31 through bearings and a second connecting rod.

[0064] Furthermore, as a specific implementation method, refer to Figure 7 , Figure 8 and Figure 9 The magnetic coupling drive 344 includes a drive magnetic ring 3445 coaxially disposed on the outside of the second tube 31 and a driven magnetic ring 3447 coaxially disposed on the rotating shaft 341. The drive magnetic ring 3445 is connected to the output shaft of the drive motor 343 through a guide transmission component. Using the magnetic coupling drive 344, the torque of the drive motor 343 is transmitted to the internal rotating shaft 341 through magnetic force passing through the non-magnetic tube wall, driving the stirring rod 342 to rotate. The drive motor 343 is a variable frequency motor, which can steplessly adjust the stirring speed according to the degree of segregation and the feeding amount command, thereby controlling the mixing intensity.

[0065] The operation of the drive motor 343 can drive the drive magnetic ring 3445 to rotate around the shaft. The rotating magnetic field of the drive magnetic ring 3445 can drive the driven magnetic ring 3447 to rotate synchronously, thereby driving the rotating shaft 341 and the stirring rod 342 to rotate, realizing leakage-free transmission. The data processor calculates the required mixing intensity based on the amount of added dry material, the amount of water added, and the segregation coefficient, and outputs a signal to adjust the speed of the drive motor 343.

[0066] Furthermore, as a specific implementation method, refer to Figure 7 , Figure 8 , Figure 9 and Figure 10 The guiding transmission component includes two annular seats 3441 coaxially disposed on the outer side of the second tube body 31 and an annular movable seat 3442 coaxially disposed between the two annular seats 3441. Annular slide rails 3443 are coaxially provided on the side surfaces of the two annular seats 3441 that are close to each other. Multiple rollers 3444 adapted to the annular slide rails 3443 are respectively provided on both sides of the annular movable seat 3442. The driving magnetic ring 3445 is coaxially embedded in the inner ring wall of the annular movable seat 3442. An external gear ring 3446 is coaxially disposed on the outer ring wall of the annular movable seat 3442. A gear 3448 that meshes with the external gear ring 3446 is coaxially disposed on the output shaft of the driving motor 343.

[0067] The slurry flows through the detection module 2, where its concentration and segregation status are detected and calculated in real time. If the overall average concentration is too low, the variable feeder 3211 feeds the corresponding amount of dry material into the dry material storage bin 326, and at the same time, the pump driven by the water turbine 322, the first piston 325, starts working to add the dry material into the slurry. If the overall average concentration is too high, the third solenoid valve of the water replenishment unit 33 opens to inject the corresponding amount of water. Regardless of whether materials are added, the mixing unit 34 will adjust the stirring speed according to the segregation coefficient and the amount added to ensure that the concentration of the slurry tends to the target value and the uniformity is improved when the slurry leaves this detection adjustment point. Multiple such detection adjustment points work in turn to jointly ensure the quality stability of the slurry at the end of long-distance transportation.

[0068] Example 3 According to the working principle of Embodiment 2, the upper part of the first cylinder 324 is provided with a first connecting port, which is connected to the outlet of the dry material storage bin 326 through a first solenoid valve. The lower part of the first cylinder 324 is provided with a second connecting port, which is connected to one end of the feeding pipe 327 through a second solenoid valve. When the water wheel 322 is driven to rotate by the slurry, the first piston 325 is driven to reciprocate through the eccentric wheel 329 and the first connecting rod 3210, which sucks the dry material in the dry material storage bin 326 into the first cylinder 324 and pumps it into the V-shaped diversion pipe 321. Then, it is carried into the second pipe 31 by the slurry to participate in subsequent mixing. In order not to affect the flow of the slurry in the V-shaped diversion pipe 321, the size of the water wheel 322 should not be too large, and the slurry flow rate is low, so that the driving force of the slurry on the water wheel 322 is limited. Often, there is insufficient power to add dry material, and the dry material is difficult to effectively penetrate the slurry and inject, which easily leads to the unsatisfactory effect of pumping the dry material into the V-shaped diversion pipe 321.

[0069] This invention discloses an online detection and automatic adjustment system for gangue slurry concentration, referring to... Figure 11 The dry material adding unit also includes a pressurizing unit 4 and a feeding unit 5. The difference from Embodiment 2 is that the first connecting port on the first cylinder 324 is connected to the outside through a first solenoid valve, the second connecting port on the first cylinder 324 is connected to the pressurizing unit 4 through a second solenoid valve, and the discharge port of the dry material temporary storage bin 326 is connected to the feeding unit 5.

[0070] Furthermore, as a specific implementation method, refer to Figure 11 and Figure 12 The pressurizing unit 4 includes a pressurizing cylinder 41, a second piston 42 adapted inside the pressurizing cylinder 41, a third connecting port and a fourth connecting port at one end of the pressurizing cylinder 41, a first return spring 43 provided at the end face of the second piston 42 away from the third connecting port and the fourth connecting port, the third connecting port being connected to the second connecting port, and the fourth connecting port being connected to the feeding unit 5 through an air outlet pipe 44, and a fourth solenoid valve 45 being provided on the air outlet pipe 44.

[0071] Furthermore, as a specific implementation method, refer to Figure 11 and Figure 13 The feeding unit 5 includes a third cylinder 50, with a partition 51 in the middle. A third piston 52 and a fourth piston 53 are respectively fitted at both ends of the partition 51 inside the third cylinder 50. A pressure chamber 54 is formed between the third piston 52 and the partition 51. A pumping chamber 55 is formed between the end face of the fourth piston 53 away from the partition 51 and the third cylinder 50. The third piston 52 and the fourth piston 53 are connected by a transmission rod 56. An L-shaped through hole 57 communicating with the pressure chamber 54 is provided at the upper end of the transmission rod 56. Several second through holes are provided on the partition 51, and a fifth solenoid valve 510 is provided on each of the second through holes. The pumping chamber 55 is connected to the outlet and replenishment pipe 327 of the dry material storage bin 326. Several first vents communicating with the inner cavity are also provided on the upper end face of the third cylinder 50. A reset chamber is formed between the fourth piston 53 and the partition plate 51. The side of the third cylinder 50 located at the upper end of the reset chamber is also provided with a plurality of second vents. The sum of the flow areas of the plurality of second vents is less than the sum of the flow areas of the second through holes.

[0072] The upper end of the third cylinder 50 is provided with a fifth connecting port, which is connected to the air outlet pipe 44, and the upper port of the L-shaped through hole 57 is connected to the fifth connecting port through a bellows pipe 58; the third cylinder 50 is provided with a sixth connecting port connected to the discharge port of the dry material storage chamber 326 and a seventh connecting port connected to the feed pipe 327 at the pump material chamber 55, the sixth connecting port is provided with a sixth solenoid valve 511, and the seventh connecting port is provided with a seventh solenoid valve 512.

[0073] The transmission rod 56 located between the partition plate 51 and the fourth piston 53 is also fitted with a second return spring 59.

[0074] When the water turbine 322 is driven to rotate by the slurry, it drives the first piston 325 to reciprocate via the eccentric wheel 329 and the first connecting rod 3210. When the first piston 325 moves towards the eccentric wheel 329, the first solenoid valve opens and the second solenoid valve closes. When the first piston 325 moves away from the eccentric wheel 329, the first solenoid valve closes and the second solenoid valve opens. The first piston 325 compresses air and pumps it into the pressurizing cylinder 41, thus continuously supplying gas into the pressurizing cylinder 41. The continuously supplied gas accumulates inside the pressurizing cylinder 41, becoming high-pressure gas. The pressurizing cylinder 41 acts as a buffer energy storage tank, accumulating gas from multiple pumping operations to form high-pressure gas higher than the pressure of a single pumping operation. When feeding is required, the opening of the fourth solenoid valve 45 can be controlled to allow the gas inside the pressurizing cylinder 41 to be fed. Gas enters the pressure chamber 54 through the gas outlet pipe 44, causing the third piston 52 and the fourth piston 53 to move upward, increasing the volume of the pumping chamber 55 and generating negative pressure. With the opening of the sixth solenoid valve 511, a preset amount of dry material inside the dry material storage bin 326 is drawn into the pumping chamber 55. After the material is drawn in, the fourth solenoid valve 45 and the sixth solenoid valve 511 are closed. Then, through the opening of the fifth solenoid valve 510 and the seventh solenoid valve 512 and the reset of the second return spring 59, the gas inside the pressure chamber 54 enters the lower end of the partition plate 51 through the second through hole, thereby pushing the fourth piston 53 downward. The dry material in the pumping chamber 55 is pushed into the feed pipe 327 under high pressure and high speed, overcoming the resistance of the slurry flow and achieving reliable injection. After the pumping is completed, the relevant solenoid valves return to their initial state, ready for the next cycle.

[0075] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0076] The embodiments described above are merely illustrative of implementation methods of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of this patent should be determined by the appended claims.

Claims

1. A method for online detection and automatic adjustment of gangue slurry concentration, characterized in that, Includes the following steps: S1. Repeat the following steps at multiple detection and adjustment points spaced apart along the extension direction of the conveying pipeline (1); S2. For the slurry flowing through the detection section corresponding to the current detection adjustment point, the concentration detection data of multiple spatial points are simultaneously acquired by a sensor array deployed in the detection section. The sensor array includes several sets of detection units arranged at intervals along the axial direction of the first tube (21). Each set of detection units includes multiple first concentration sensors (22) evenly distributed on the inner wall of the first tube (21) in the circumferential direction and a fixed rod (24) located inside the first tube (21) and extending radially. At least one second concentration sensor (23) is provided on the fixed rod (24) near the middle position. S3. Based on all the acquired concentration detection data, calculate the overall average concentration of the gangue slurry in the detection section, and the segregation coefficient, which characterizes the degree of stratification of the gangue slurry; the segregation coefficient is based on the difference between the average concentration of the sensor located on the lower side of the detection section and the average concentration of the sensor located on the upper side of the detection section, and Divide by The overall average concentration was calculated. S4. Compare the overall average concentration obtained from the detection section with the preset concentration target range to determine whether dry material or moisture needs to be added; at the same time, compare the segregation coefficient with the preset segregation coefficient target range to determine the degree of segregation. S5. Based on the judgment result, initiate the corresponding adjustment action on the spot to treat the slurry flowing through the detection section in real time. The adjustment action includes re-homogenizing the segregated slurry and / or adjusting the concentration of the slurry with abnormal concentration.

2. The method for online detection and automatic adjustment of gangue slurry concentration according to claim 1, characterized in that, In step S5, the adjustment action performs the corresponding operation: When it is determined that dry material needs to be added, the preset amount of dry material is injected into the slurry downstream of the detection section; When it is determined that water needs to be added, a preset amount of water is injected into the slurry downstream of the detection section; The slurry after the injection of materials is mixed at a corresponding rate, depending on the degree of segregation and / or the amount of material added.

3. The method for online detection and automatic adjustment of gangue slurry concentration according to claim 2, characterized in that, The specific steps for supplementing the dry material are as follows: A1. When the overall average concentration is determined to be less than the preset concentration target range, the controller calculates the preset amount of dry material to be added based on the difference between the two. A2. The controller controls the variable feeder (3211) to work. The variable feeder (3211) takes out a preset amount of dry material from the dry material storage bin and transports it to the dry material temporary storage bin (326). A3. A portion of the slurry is drawn from the downstream of the detection section to drive a water turbine (322) to rotate, and the rotational motion of the water turbine (322) is converted into the reciprocating linear motion of the first piston (325) through the eccentric wheel (329). The reciprocating motion of the first piston (325) pumps the dry material in the dry material storage bin (326) into the slurry.

4. The method for online detection and automatic adjustment of gangue slurry concentration according to claim 2, characterized in that, The specific steps for replenishing water are as follows: B1. When the overall average concentration is determined to be greater than the preset concentration target range, the controller calculates the preset amount of water to be added based on the difference between the two. B2. The controller controls the water pump to work. The water in the water tank is pumped into the water replenishment unit (33) by the water pump. The water is injected into the slurry by controlling the opening and closing of the water injection pipe (332) on the water replenishment unit (33). The total amount of water replenishment is monitored by the flow meter built into the water tank.

5. A system for online detection and automatic adjustment of gangue slurry concentration, characterized in that, The method according to any one of claims 1 to 4 includes a plurality of detection and adjustment points arranged in series at intervals along the conveying pipeline (1); each detection and adjustment point includes: The detection module (2) includes a first tube (21) and a sensor array arranged inside it, used to acquire the concentration data of the slurry flowing through it online and calculate the overall average concentration and segregation coefficient; The adjustment execution module (3) is connected in series with the end of the detection module (2) and is used to receive instructions and perform adjustment operations. It includes a second pipe body (31) connected to the flange of the first pipe body (21), a dry material addition unit located at the connection between the first pipe body (21) and the second pipe body (31), a water replenishment unit (33) located at the inlet end of the second pipe body (31), and a mixing unit (34) located in the second pipe body (31) and downstream of the water replenishment unit (33). The dry material addition unit is used to add dry material to the slurry; the water replenishment unit (33) is used to inject water into the slurry; and the mixing unit (34) is used to stir and mix the slurry.

6. The online detection and automatic adjustment system for gangue slurry concentration according to claim 5, characterized in that, The dry material addition unit includes: V-shaped diversion pipe (321) connects the first pipe body (21) and the second pipe body (31). The V-shaped diversion pipe (321) is equipped with a water wheel (322) driven by the slurry to rotate. The dry material adding mechanism (323) includes a first cylinder (324), a first piston (325), a dry material temporary storage bin (326), and a feeding pipe (327); The transmission mechanism connects the drive shaft (328) of the water wheel (322) to the first piston (325), converting the rotational motion of the water wheel (322) into the reciprocating motion of the first piston (325), so as to pump the dry material in the dry material storage bin (326) into the interior of the V-shaped diversion pipe (321) through the feeding pipe (327).

7. The online detection and automatic adjustment system for gangue slurry concentration according to claim 6, characterized in that, The transmission mechanism includes an eccentric wheel (329) disposed at the end of the drive shaft (328) and a first connecting rod (3210) connecting the eccentric wheel (329) and the first piston (325).

8. The online detection and automatic adjustment system for gangue slurry concentration according to claim 5, characterized in that, The water replenishment unit (33) includes an annular water injection ring (331) coaxially sleeved on the outside of the second pipe body (31). The inner ring of the annular water injection ring (331) is provided with a plurality of water injection pipes (332) communicating with the inside of the second pipe body (31) along the circumferential direction. Each water injection pipe (332) is provided with a third solenoid valve.

9. The online detection and automatic adjustment system for gangue slurry concentration according to claim 5, characterized in that, The mixing unit (34) includes a rotating shaft (341) coaxially disposed within the second tube (31), a plurality of stirring rods (342) disposed on the rotating shaft (341), a drive motor (343) disposed on the outside of the second tube (31), and a magnetic coupling drive component (344) connecting the drive motor (343) and the rotating shaft (341).

Images