Mining coal water weighing, metering and conveying process

Abstract

The invention relates to the technical field of coal mining, in particular to a mining coal water weighing, metering and conveying process. The mining coal-water weighing, metering and conveying process comprises the following steps: inputting a coal-water mixture generated in an underground drilling process into a metering bin provided with a liquid level sensor; measuring the total weight of the coal-water mixture under the set liquid level in the metering bin by using a weighing sensor; when the liquid level sensor is triggered, calculating the weight of coal in the coal-water mixture under the set liquid level by utilizing a control system which is in communication connection with the liquid level sensor and the weighing sensor according to an internal coal-water mass-volume relation model; and discharging the weighed and metered coal-water mixture into a pumping system from the metering bin, and pumping out the coal-water mixture through a pump pipe. The coal weight can be accurately metered, a closed pumping mode is adopted, more roadway space is saved, and the influence of accumulated water on safety production, equipment operation and the roadway environment is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of coal mining, and particularly relates to a weighing, metering and conveying process for mine-used coal and water. Background Art

[0002] The coal generated during the drilling process is a direct reflection of the occurrence state of the coal seam, the drilling efficiency, and the gas drainage effect. By accurately measuring the coal content, the coal output per single hole and the total cumulative coal output can be grasped in real time, providing data support for mine output accounting and drilling process optimization (such as adjusting the drilling speed and pressure).

[0003] When drilling and punching holes underground, the commonly used metering method is to separate coal and water and then separately measure the separated coal. For example, the coal mine crawler-type gas-slag-water separation metering and transfer device disclosed in the Chinese invention patent application document with the application publication number CN115382294A inputs the slag-water mixture into a movable inner cavity for solid-liquid separation. The separated water is discharged outside the device through the transfer water cavity, and the separated coal slag accumulates in the movable inner cavity. After it is observed manually that the movable inner cavity is full of coal slag, the movable inner cavity is extended so that the coal slag filled in the movable inner cavity is unloaded onto the belt conveyor in the roadway. Since the volume of the coal slag unloaded each time is certain, the metering method of the coal weight by the above device is carried out under a fixed volume.

[0004] Another example is a walking-type solid-liquid separation metering machine disclosed in the Chinese invention patent with the authorization publication number CN111577238B. When it works, the solid-liquid mixture enters from the slag inlet mechanism and enters the separation mechanism, so as to separate water and solid particles. The separated water is discharged from below, and the solid particles enter the self-unloading mechanism. After the worker observes that the metering bin of the self-unloading mechanism is full of solid particles, the metering bin is flipped by using the rotating mechanism at the bottom. The metering bin can be rotated at any angle to realize self-unloading and tipping. The tipping bucket can directly unload the solid particles onto the belt conveyor / scraper conveyor on both sides of the roadway, or can also be tipped into the corridor in the roadway for easy cleaning. Since the volume of the metering bin is certain, the volume of the coal slag unloaded each time is certain, that is, the metering method of the coal weight by the above walking-type solid-liquid separation metering machine is also carried out under a fixed volume.

[0005] It can be seen from this that the method of using the solid-liquid separation method to measure the coal weight is widely used in the field of mine operations. However, this metering method also has the following problems in actual application: 1. It is necessary to observe or estimate by the naked eye of coal miners whether the movable inner cavity or the metering bin is full of coal, which easily leads to errors in the statistics of the coal output.

[0006] 2. A conveyor belt needs to be installed in the underground roadway. The conveyor belt takes up space in the roadway cross-section, which is not conducive to the passage of other underground engineering vehicles. If passage is required, the conveyor belt at the corresponding position needs to be removed first, and then reinstalled after the engineering vehicle has passed, which affects the operation efficiency. 3. During the process of discharging the metered coal onto the conveyor belt, the water mixed in the coal will fall from the conveyor belt onto the roadway floor, easily causing water accumulation in the roadway, which has an impact on safe production, equipment operation, and roadway environment. Summary of the Invention

[0007] The purpose of the present invention is to provide a weighing and metering conveying process for mine coal and water, so as to solve the technical problems of existing solid-liquid separation metering methods that are prone to metering errors, occupy too much space in the underground roadway cross-section, and affect underground operations.

[0008] To solve the above problems, the weighing and metering conveying process for mine coal and water provided by the present invention adopts the following technical solutions: The weighing and metering conveying process for mine coal and water includes: Input the coal-water mixture generated during the underground drilling process into a metering bin equipped with a liquid level sensor. Use a weighing sensor to measure the total weight of the coal-water mixture in the metering bin at a set liquid level. When the liquid level sensor is triggered, use a control system that is communicatively connected to both the liquid level sensor and the weighing sensor, and calculate the weight of the coal in the coal-water mixture at the set liquid level according to the internally set coal-water mass-volume relationship model. Discharge the coal-water mixture after weighing and metering from the metering bin into a pumping system, and pump out the coal-water mixture through a pump pipe. The beneficial effects of the present invention are as follows: The present invention directly weighs the coal-water mixture that enters the metering bin and is at a set liquid level using a weighing sensor. The control system can directly measure the weight of the coal in the coal-water mixture at a set volume according to the coal-water mass-volume relationship model, realizing automatic and accurate metering, and avoiding errors caused by manual visual observation or estimation. Compared with the prior art, the process of the present invention directly weighs and meters the coal-water mixture without the need for coal-water separation operations; in addition, the pumping system pumps out through a pump pipe, which belongs to a closed conveying method, avoiding water from flowing into the roadway and affecting the roadway environment, safe production, and equipment operation; and the method of pumping through a pump pipe does not require a belt conveyor line to be installed in the underground roadway, correspondingly saving space in the underground roadway cross-section and facilitating the passage of underground engineering vehicles.

[0009] Further, the coal-water mass-volume relationship model is: ; ; Wherein, X represents the volume of water in the water-coal mixture, Y represents the volume of coal in the water-coal mixture, and V is the total volume of the water-coal mixture; Z is the mass of water in the water-coal mixture, and Z is numerically equal to X; σY is the mass of coal in the water-coal mixture, σ is the specific gravity of water and coal, and the value range of σ is 1.2 to 1.5; M is the total mass of the water-coal mixture, and this mass is measured by the weighing sensor.

[0010] Beneficial effects: The water-coal mass and volume model is universal and can be applied to mining operations in different situations; in actual application, by determining the value of σ according to the sampling results at different positions, it can be substituted for accurate measurement.

[0011] Furthermore, two metering bins are used for alternating weighing. Each metering bin is provided with an inlet for the water-coal mixture. An input pipeline is connected between the inlets of the water-coal mixture of the two metering bins. A switching valve is arranged on the input pipeline, and the switching valve has a slag inlet; after the liquid level sensor on one of the metering bins is triggered, the control system receives a signal to control the switching valve to switch, so that the water-coal mixture is input into the other metering bin.

[0012] Beneficial effects: By using double metering bins for alternating weighing, when one bin is weighing or discharging, the other bin can be feeding synchronously. The seamless connection of the process is realized through the switching valve, avoiding the intermittent shutdown caused by single-bin operation of the existing device, and improving the processing efficiency of the overall system. There is no need for manual intervention in switching. The control system automatically responds to the liquid level trigger signal and switches the feeding path in real time to adapt to the scenario where the water-coal mixture continuously generates in the underground borehole, ensuring the continuous and stable metering and conveying process.

[0013] Furthermore, during the process of discharging the weighed and metered water-coal mixture into the pumping system, a vibrator is used to vibrate the inner wall of the metering bin, and at the same time, shock absorbers are arranged at the bottom of the metering bin for buffering.

[0014] Beneficial effects: The vibrator vibrates the inner wall of the bin to prevent the water-coal mixture from adhering to the bin wall and causing residues, and avoid the influence of the residual materials on the next metering accuracy; the shock absorbers at the bottom buffer the vibration, reduce the interference of the vibration on the weighing sensor, ensure the stability during weighing, and take into account the discharging efficiency and metering accuracy. By using mechanical vibration to assist in discharging, the frequency of manual cleaning of the bin wall is reduced, and the degree of automation is improved.

[0015] Furthermore, a one-to-four weighing sensor is adopted. The four weighing sensors are distributed in a rectangle around the metering bin; two vibrators are used and are symmetrically arranged on the front and back sides of the metering bin; four shock absorbers are arranged and are distributed in a rectangle below the corresponding weighing sensors.

[0016] Beneficial effects: The four-in-one weighing sensors are rectangularly distributed to evenly collect the weight data around the silo, avoiding the deviation of single-point measurement and improving the weighing accuracy; the two symmetrically arranged vibrators make the force on the silo wall uniform, with a more comprehensive vibration effect and more thorough discharging. The shock absorber is arranged below the weighing sensor to protect the weighing sensor from vibration interference and ensure the reliability of the weight data during the metering process.

[0017] Furthermore, a rotary nozzle is installed on the lid of the metering silo, and the rotary nozzle is opened during the vibration of the vibrator to wash the inner wall of the metering silo without dead angles.

[0018] Beneficial effects: The rotary nozzle washes the silo wall during vibration, cooperating with the vibrator to break the adhered coal particles, achieving dead-angle-free cleaning, thoroughly removing the residual materials, and avoiding the metering error caused by the residue. There is no need for manual intervention in cleaning, which is synchronized with vibratory discharging, improving the degree of process integration and reducing the maintenance cost.

[0019] Furthermore, a transparent observation window is provided on the metering silo, and at the same time, a liquid level scale line is marked on the observation window, and the height marked by the liquid level scale line is the set liquid level.

[0020] Beneficial effects: The transparent observation window and the liquid level scale line assist manual visual inspection, complementing the automatic detection of the liquid level sensor to ensure the accuracy of the set liquid level, avoiding misjudgment caused by the failure of the liquid level sensor, and improving the system reliability. In addition, it is convenient for on-site personnel to monitor the state of the metering silo in real time, promptly detect abnormalities (such as abnormal fluctuations in the liquid level), enhance the human-machine interaction, and meet the operation requirements in the complex underground environment.

[0021] Furthermore, an overflow port is opened at a position flush with the liquid level scale line on the metering silo, and the coal-water mixture above the liquid level scale line is discharged through the overflow port.

[0022] Beneficial effects: The overflow port is flush with the liquid level scale line, and when the coal-water mixture exceeds the set liquid level, it overflows automatically, preventing the actual volume from exceeding the calculation range of the metering model due to too high a liquid level, ensuring that the volume of each metering is strictly equal to the volume corresponding to the set liquid level, and avoiding the metering deviation caused by excessive feeding.

[0023] Furthermore, the pumping system uses at least two-stage high-lift slurry pumps to pump the weighed coal-water mixture to a set position.

[0024] Beneficial effects: By directly pumping the coal-water mixture with a high-lift slurry pump, there is no need to lay a belt conveyor line, avoiding occupying the cross-sectional space of the roadway, facilitating the passage of underground engineering vehicles, improving the utilization rate of the roadway space, and solving the problem of low operating efficiency caused by belt conveying in the prior art. In addition, the multi-stage slurry pump meets the high-lift and long-distance conveying requirements of complex underground terrains, ensuring that the coal-water mixture can be efficiently conveyed to the designated location and adapting to the working conditions of deep mining in mines.

[0025] Furthermore, the installation height of the liquid level sensor on the metering bin is adjustable.

[0026] Beneficial effects: The adjustable installation height of the liquid level sensor can dynamically adjust the set liquid level according to the actual characteristics of the coal-water mixture (such as coal concentration, particle size) or production requirements, changing the volume range of single measurement, making the process applicable to mines with different drilling efficiencies and different coal seam conditions, and enhancing the versatility and flexibility of the system. Brief Description of the Drawings

[0027] Figure 1 is the flow chart of the mine-used coal-water weighing, metering and conveying process of the present invention; Figure 2 is the structural schematic diagram of the device adopting the mine-used coal-water weighing, metering and conveying process of the present invention; Figure 3 is Figure 2 the front view of Figure 4 is Figure 2 the top view of

[0028] Description of the Reference Numerals in the Drawings: 1. Crawler traveling mechanism; 11. Bin support; 2. Control unit; 3. Drainage and blowout prevention box; 4. Coal-water weighing unit; 41. Bin; 411. Observation window; 412. Liquid level scale line; 413. Overflow port; 42. Weighing sensor; 43. Liquid level sensor; 44. Rotary nozzle; 45. Discharge valve; 46. Switching valve; 47. Input pipeline; 5. Solid-liquid pumping unit; 51. Pump box; 52. Slurry pump; 6. Vibrator; 7. Shock absorber; 8. Hydraulic pump station. Detailed Embodiments

[0029] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention.

[0030] Embodiment of the mine-used coal-water weighing, metering and conveying process provided by the present invention: As Figure 1 shown, the main steps of the mine-used coal-water weighing, metering and conveying process of the present invention include: Step 1: Input the coal-water mixture generated during the underground drilling process into the metering bin equipped with a liquid level sensor; Step 2: Use a weighing sensor to measure the total weight of the coal-water mixture at a set liquid level in the metering bin. Step 3: When the liquid level sensor is triggered, use a control system that is communicatively connected to both the liquid level sensor and the weighing sensor. According to the internally set coal-water mass-volume relationship model, calculate the weight of the coal in the coal-water mixture at the set liquid level. Step 4: Discharge the coal-water mixture after weighing and metering from the metering bin into the pumping system, and pump out the coal-water mixture through the pump pipe.

[0031] Specifically, in Step 3, the coal-water mass-volume relationship model is: , (1) , (2) Formula (1) represents that the sum of the volumes of water and coal in the coal-water mixture is equal to a fixed volume. Since the detected liquid level of the liquid level sensor is constant, the volume of the coal-water mixture entering the metering bin each time is constant. In Formula (1), X represents the volume of water in the coal-water mixture, Y represents the volume of coal in the coal-water mixture, and V is the total volume of the coal-water mixture. Formula (1) indicates that the sum of the volumes of water and coal is balanced at a certain volume. It should be noted that the volumes of water and coal can be calculated based on the relationship between their respective masses and densities, but in this formula, they are only added as volumes, conforming to the principle of conservation of matter.

[0032] Formula (2) represents that under the set total volume (V) of the coal-water mixture, the sum of the mass of water and the mass of coal is equal to the total weighed mass. In Formula (2), Z is the mass of water in the coal-water mixture, and Z is numerically equal to X. For example, the weight of 1 cubic meter of water is 1 ton. σY is the mass of coal in the coal-water mixture, σ is the specific gravity of coal and water; M is the total mass of the coal-water mixture, and this mass is measured by the weighing sensor 42. The value range of σ is 1.2 - 1.5, and this range is well-known in the coal industry, but the specific value depends on the characteristics of the coal at the coal mine site (such as density, particle size, humidity, etc.). During actual production, it can be measured through on-site sampling.

[0033] Based on the above two formulas, the mass of coal can be converted. The mass of coal finally measured in this application refers to the value of σY.

[0034] In order to improve the weighing and metering efficiency, two metering bins are used for alternate weighing. A coal-water mixture inlet is opened on each metering bin. The coal-water mixture inlets of the two metering bins are connected through an input pipeline. A switching valve is arranged on the input pipeline, and a slag inlet is provided on the switching valve. After the liquid level sensor on one of the metering bins is triggered, the control system receives the signal and controls the switching valve to switch, so that the coal-water mixture is input into the other metering bin. The control system includes a PLC controller, which can receive the signals transmitted by the weighing sensor and the liquid level sensor, and can send signals to the switching valve to control the on-off of the switching valve.

[0035] It should be noted that the weighing sensor has a tare detection function and can directly detect the total weight of the coal-water mixture in the bin.

[0036] A discharge valve is arranged at the bottom outlet of the metering bin. When the coal-water mixture is weighed in the metering bin, the coal in the coal-water mixture will precipitate towards the bottom outlet. To prevent the bottom outlet of the metering bin from being blocked during discharging, during the process of discharging the weighed and metered coal-water mixture into the pumping system, a vibrator is used to vibrate the inner wall of the metering bin, and at the same time, shock absorbers are arranged at the bottom of the metering bin for buffering.

[0037] The metering bin has four inner walls arranged obliquely and connected together. To ensure the measurement accuracy, a one-to-four weighing sensor is used, and the four weighing sensors are distributed in a rectangle around the metering bin; two vibrators are used and symmetrically arranged on the front and back sides of the metering bin; four shock absorbers are arranged and distributed in a rectangle below the corresponding weighing sensors to avoid the influence of the vibrator on the accuracy of the weighing sensor. The liquid level sensor can adopt a float type liquid level gauge.

[0038] In order to avoid the failure of the vibrator or the vibrator not being able to completely vibrate off the coal attached to the inner wall, in actual production, a rotating sprinkler is installed on the cover of the metering bin. The rotating sprinkler can rotate 360°. During the vibration of the vibrator, the rotating sprinkler is opened to wash the inner wall of the metering bin without dead angles to ensure that the residual coal does not affect the subsequent metering.

[0039] To avoid metering errors caused by the failure of the liquid level sensor, a transparent observation window is arranged on the metering bin, and at the same time, liquid level scale lines are marked on the observation window. The height marked by the liquid level scale lines is the above-mentioned set liquid level. During the drilling production operation, workers can observe the liquid level of the coal-water mixture in the metering bin through the transparent observation window, forming a double insurance with the detection of the liquid level sensor to ensure the accuracy of the set liquid level.

[0040] When inputting the coal-water mixture into the metering bin, if the liquid level sensor is triggered, the PLC controller will send a signal to the switching valve to control the switching of the switching valve. At this time, due to inertia, some coal-water mixture will still enter the metering bin. An overflow port is opened at the position on the metering bin that is flush with the liquid level scale line, so that the excess coal-water above the liquid level scale line can be discharged.

[0041] The pumping system uses at least two-stage high-lift slurry pumps, which can achieve long-distance transportation and reduce the pipeline blockage rate.

[0042] In actual production, the set liquid level can be dynamically adjusted according to the characteristics of the actual coal-water mixture (such as coal concentration, particle size) or production requirements to change the volume range of single measurement. At this time, the installation height of the measuring end of the liquid level sensor can be adjusted to achieve this.

[0043] The mine-used coal-water weighing and metering transportation process of the present invention can be realized by the following device in actual application: Such as Figure 2 As shown, the device includes a crawler walking mechanism 1 and a control unit 2, a gas drainage blowout prevention box 3, a hydraulic pump station 8, a coal-water weighing unit 4, and a solid-liquid pumping unit 5 integrally installed on the crawler walking mechanism 1.

[0044] There are two groups of coal-water weighing units 4, which are arranged at intervals in the left-right direction, and the structures of the two groups of coal-water weighing units 4 are the same. Each group of coal-water weighing units 4 includes a metering bin 41, a weighing sensor 42, and a liquid level sensor 43. Bin supports 12 are installed at the positions corresponding to each metering bin 41 on the crawler walking mechanism 1, and the metering bin 41 is fixed on the bin supports 12. The weighing sensor 42 is a one-to-four weighing sensor, that is, one control unit 2 manages four weighing sensors 42, and the four weighing sensors 42 are rectangularly distributed around the lower part of the metering bin 41 and fixed on the bin supports 12.

[0045] Two vibrators are symmetrically arranged on the front and rear sides of the bottom of the metering bin 41 of the bin support 12. Four shock absorbers 7 are also arranged at the positions around the bottom of the metering bin 41 in a rectangular distribution. The bottoms of the four shock absorbers 7 are fixed on the crawler walking mechanism 1, and the tops are fixed to the bin support 12, which can evenly support the bin support 12 and effectively isolate the vibration transmission.

[0046] A rotary sprinkler 44 is installed on the top cover of the metering bin 41. The rotary sprinkler 44 can rotate 360°, covering the entire bin wall, with no dead angle for cleaning, ensuring the cleanliness of the inner bin wall of the metering bin 41, and ensuring that the detection data of the liquid level sensor 43 and the weighing sensor 42 are not interfered by impurities.

[0047] The metering bin 41 is provided with a transparent observation window 411, and a horizontal liquid level scale line 412 is provided on the observation window 411. The water level line detected by the liquid level sensor 43 is the position of the above-mentioned liquid level scale line 412. That is to say, the liquid level of the coal-water mixture input into the metering bin 41 each time is at the position of the above-mentioned liquid level scale line 412. Since the size of the metering bin 41 is fixed and the liquid level is also fixed, the volume of the coal-water mixture entering the metering bin 41 each time can be calculated at this time. An overflow port 413 is opened beside the observation window 411 on the metering bin 41. The overflow port 413 can control the liquid level height of the coal-water mixture in the bin 41 at the position of the liquid level scale line 412, ensuring that the volume of the coal-water mixture weighed each time is constant.

[0048] As Figure 2 shown, a discharge valve 45 is provided at the bottom of each metering bin 41. An input pipeline 47 is connected between the two metering bins 41, and a switching valve 46 is arranged on the input pipeline 47. There is a slag inlet on the switching valve 46, which is connected to the solid-liquid output port on the gas drainage blowout prevention box 3 through a pipeline.

[0049] As Figure 3 and Figure 4 shown, the solid-liquid pumping unit 5 includes a pump box 51 and a slurry pump 52 installed in the pump box 51. The slurry pump 52 is a high-lift slurry pump with a long pumping distance, and the slurry pump 52 is connected with a pump pipe. The weighed thick coal-water mixture in the two metering bins is discharged into the pump box 51 after the discharge valve is opened, and the excess coal-water mixture overflowing at the overflow port is also discharged into the pump box 51.

[0050] The control unit 2 includes an explosion-proof control cabinet (with a PLC controller installed inside), a display screen and a data storage module. The control unit 2 is communicatively connected with the above-mentioned weighing sensor 42 and liquid level sensor 43, and is control-connected with the above-mentioned discharge valve 45, switching valve 46 and slurry pump 52. The display screen is a touch screen, serving as a human-machine interaction interface, which is used to display weighing data, cumulative total weight, and store historical weighing data in real time, facilitating on-site viewing and operation by the staff in the mine. A coal-water mass-volume relationship model is pre-stored in the data storage module.

[0051] The following describes in detail the application of the mine-used coal-water weighing, metering and conveying process of the present invention in actual production based on the working process of the above device.

[0052] Record that the two metering bins are the No. 1 metering bin and the No. 2 metering bin respectively. When the drill rig is conducting hydraulic punching, the coal-water mixture flows out of the borehole, enters the drainage and blowout prevention box 3 through the pipeline, and is pumped into the No. 1 metering bin. At this time, the liquid level sensor 43 in the No. 1 metering bin and the external weighing sensor 42 start to work, monitor the liquid level and weight information in the No. 1 metering bin in real time, and transmit the data to the control unit 2. When the liquid level in the No. 1 metering bin reaches the position of the liquid level scale line 412 and triggers the liquid level sensor 43, it indicates that the No. 1 metering bin is full, and the liquid level sensor 43 sends a signal to the control unit 2. After receiving the signal, the control unit 2 immediately controls the switching valve 46 to switch, so that the coal-water mixture changes direction and flows into the No. 2 metering bin. The weighing sensor 42 at the No. 1 metering bin transmits the weight data of the coal-water mixture in the No. 1 metering bin to the control unit 2, and the control unit 2 analyzes and calculates the weight of the coal in the No. 1 metering bin according to the above coal mass-volume relationship model. At the same time, the control unit 2 stores the collected data, and displays important data such as the total weight of the coal-water mixture in the No. 1 metering bin, the weight of the coal in the bin, the cumulative coal output weight of this shift, and the cumulative coal output weight of a single hole on the display screen. After the control unit 2 completes the analysis and calculation, it sends a signal to control the discharge valve 45 at the bottom of the No. 1 metering bin to open, and the coal-water mixture in the No. 1 metering bin flows into the pump box 51 through the pipeline. During this process, the vibrator 6 and the rotary sprinkler 44 can be turned on. When the pump box 51 is full, the slurry pump 52 starts and pumps the coal-water mixture to the set position. When the No. 2 metering bin is full, repeat the above process, and the two bins cycle like this to achieve continuous metering of the coal output and transport it out through the pipeline. The data can be uploaded to the ground base station in real time through the transmission module to realize data networking and sharing.

[0053] The coal-water weighing, metering and conveying process for mine use of the present invention directly weighs and meters the coal-water mixture that reaches the set liquid level in the metering bin without the need for solid-liquid separation operation; combines the weighing sensor, the liquid level sensor and the coal mass-volume relationship model, and can accurately meter the weight of the coal in the coal-water mixture under the set volume; in addition, the weighed coal-water mixture is pumped out through the closed pump pipe, without the need to set up a belt conveyor line in the roadway, saving space, and at the same time avoiding water accumulation in the roadway and reducing the impact on safe production, equipment operation and roadway environment.

[0054] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. The coal-water weighing, metering and conveying process for mining use is characterized in that Including: Inputting the coal-water mixture generated during the downhole drilling process into a metering bin equipped with a liquid level sensor; Measuring the total weight of the coal-water mixture at a set liquid level in the metering bin using a weighing sensor; When the liquid level sensor is triggered, using a control system that is communicatively connected to both the liquid level sensor and the weighing sensor, and calculating the weight of the coal in the coal-water mixture at the set liquid level according to the internally set coal-water mass-volume relationship model; Discharging the coal-water mixture after weighing and metering from the metering bin into a pumping system, and pumping out the coal-water mixture through a pump pipe.

2. The coal-water weighing, metering and conveying process for mine use according to claim 1, characterized in that, The coal-water mass-volume relationship model is: ； ； Wherein, X represents the volume of water in the coal-water mixture, Y represents the volume of coal in the coal-water mixture, V is the total volume of the coal-water mixture; Z is the mass of water in the coal-water mixture, and Z is numerically equal to X; σY is the mass of coal in the coal-water mixture, σ is the specific gravity of coal to water, and the value range of σ is 1.2 to 1.5; M is the total mass of the coal-water mixture, and this mass is measured by the weighing sensor.

3. The coal-water weighing, metering and conveying process for mining use according to claim 1, characterized in that, Two metering bins are used for alternate weighing. A coal-water mixture inlet is opened on each metering bin. An input pipeline is connected between the coal-water mixture inlets of the two metering bins. A switching valve is arranged on the input pipeline, and a slag inlet is provided on the switching valve; after the liquid level sensor on one of the metering bins is triggered, the control system receives a signal to control the switching valve to switch, so that the coal-water mixture is input into the other metering bin.

4. The coal-water weighing, metering and conveying process for mine use according to claim 1, characterized in that, During the process of discharging the coal-water mixture after weighing and metering into the pumping system, a vibrator is used to vibrate the inner wall of the metering bin, and at the same time, shock absorbers are arranged at the bottom of the metering bin for buffering.

5. The coal-water weighing, metering and conveying process for mine use according to claim 4, characterized in that A one-to-four weighing sensor is adopted, and the four weighing sensors are distributed in a rectangle around the metering bin; two vibrators are used and are symmetrically arranged on the front and back sides of the metering bin; four shock absorbers are arranged and are distributed in a rectangle below the corresponding weighing sensors.

6. The coal-water weighing, metering and conveying process for mining according to claim 4, characterized in that, A rotary sprinkler is installed on the cover of the metering bin, and the rotary sprinkler is opened during the vibration of the vibrator to wash the inner wall of the metering bin without dead angles.

7. The coal-water weighing, metering and conveying process for mining according to any one of claims 1-6, characterized in that, A transparent observation window is arranged on the metering bin, and at the same time, liquid level scale lines are marked on the observation window, and the height marked by the liquid level scale lines is the set liquid level.

8. The coal-water weighing, metering and conveying process for mine use according to claim 7, characterized in that, An overflow port is opened at a position flush with the liquid level scale line on the metering bin, and the coal-water mixture higher than the liquid level scale line is discharged through the overflow port.

9. The coal-water weighing, metering and conveying process for mine use according to any one of claims 1-6, characterized in that, The pumping system uses at least two high-lift slurry pumps to pump out the weighed coal-water mixture to a set position.

10. The coal-water weighing, metering and conveying process for mine use according to any one of claims 1-6, characterized in that The installation height of the liquid level sensor on the metering bin is adjustable.

Images