Intelligent heavy medium adding system

Abstract

The utility model discloses an intelligent heavy medium adding system which comprises a density meter, an intelligent adjusting valve, an electromagnetic chuck, a cable coil, a sensor unit, a lifting walking mechanism, a track, a 5G industrial communication module, a main control cabinet and an auxiliary control cabinet. The density meter is connected with the production system, measures the density of the heavy suspension in the production system in real time, and controls the intelligent regulating valve to be automatically opened and closed through the main control cabinet to regulate the density of the heavy suspension in the production system; the lifting walking mechanism moves along the track, based on data of the sensor unit, medium powder in the medium warehouse is adsorbed by lifting, descending and moving the electromagnetic chuck on the lower portion, the medium powder is carried and falls into the medium combining barrel, and full-automatic heavy medium adding is achieved. According to the intelligent adding system, unmanned full-automatic operation is achieved, post and operation risks are effectively reduced, the density control stability of a dense medium coal preparation plant is improved, the dense medium coal preparation process precision is guaranteed, and economic benefits and social benefits of the coal preparation plant are increased.

Description

Technical Field

[0001] The utility model relates to the technical field of coal preparation equipment, in particular to a heavy medium intelligent addition system. Background Technique

[0002] Heavy medium coal preparation plants mainly use suspensions prepared from magnetite powder (hereinafter generally referred to as "medium powder") and water as the separation medium for coal preparation. The addition of medium powder is an indispensable technological process in the production process of heavy medium coal washing.

[0003] The traditional method of adding medium powder mainly relies on manual operation. Workers operate the walking and lifting of the crane and cooperate with the electromagnetic chuck fixed on the crane hook to adsorb and release the medium powder, transporting the medium powder from the medium storage to above the medium barrel, and enabling the medium powder to enter the medium barrel in the production system and mix with the water in the barrel to form a heavy suspension for production use.

[0004] Chinese Utility Model Patent CN 221375403 U provides a medium automatic addition system, including: a storage tank, with a partition arranged on the inner wall of the storage tank, a pressure pump arranged inside the storage tank, a filter screen arranged on one side of the partition, a connecting pipe and an auxiliary structure arranged inside the storage tank, and an adjusting structure arranged on the upper part. During the production process of heavy medium coal washing, it can automatically supplement water according to the operation of the production system, improving the water addition efficiency, ensuring the stability of the production system, enabling the water to fully blend with the medium, and avoiding affecting the physical health of the staff. By setting the auxiliary structure, when adding water to the medium, it can drive the scraper to evenly spread the medium, enabling the water to fully blend with the medium, and further improving the dilution efficiency. However, this system can only automatically add water to the production system to promote the fusion of water, and cannot add medium powder.

[0005] In the actual production process, due to certain losses of medium powder, it is necessary to continuously supplement medium powder to the system according to the production situation. Manual operation requires a large amount of manpower and financial resources, and the calculation accuracy of the amount of medium powder to be added is not high. If the medium powder is added in excess, it will cause the medium barrel to overflow, resulting in serious losses. Summary of the Utility Model

[0006] The problem to be solved by the utility model is: to provide a heavy medium intelligent addition system that automatically adds medium powder and water to the production system, reduces the demand for manual positions, reduces operation risks, and effectively improves the stability of density control in heavy medium coal preparation plants.

[0007] The utility model adopts the following technical scheme: a heavy medium intelligent addition system, including: a density meter, an intelligent regulating valve, an electromagnetic chuck, a cable reel, a sensor unit, a lifting and walking mechanism, a track, a 5G industrial communication module, a main control cabinet, and an auxiliary control cabinet;

[0008] The density meter is connected to the production system to measure the density of the heavy suspension in the production system in real time and output it to the main control cabinet, which controls the automatic opening and closing of the intelligent regulating valve; the intelligent regulating valve is installed between the clear water supply pipe in front of the pump and the combined medium barrel in the production system, and adjusts the density of the heavy suspension in the production system by controlling the amount of clear water added in front of the pump.

[0009] The track is arranged above the medium storage and the combined medium barrel in the production system. The lifting and traveling mechanism is suspended below the track and moves along the track. The electromagnetic chuck is connected below the lifting and traveling mechanism, moves with the lifting and traveling mechanism, and is lifted and lowered through the cable reel arranged on the lifting and traveling mechanism, adsorbing the medium powder in the medium storage and dropping the medium powder into the combined medium barrel.

[0010] The auxiliary control cabinet and the sensor unit are arranged on the lifting and traveling mechanism or the track. The sensor unit is used to scan the inventory status of the medium powder in the medium storage in the production system, measure the traveling distance, lifting and lowering height of the electromagnetic chuck, and the weight of the adsorbed medium powder, and send the data to the auxiliary control cabinet.

[0011] The auxiliary control cabinet is connected to the main control cabinet through a 5G industrial communication module and outputs signals; the main control cabinet receives the signals and automatically controls the lifting and traveling mechanism and the electromagnetic chuck through a programmable controller.

[0012] As a preferred technical solution of the present invention: The electromagnetic chuck is based on the principle of electromagnetic induction and is composed of a disc-shaped steel shell and an exciting coil inside the shell. When the exciting coil is energized with direct current, a magnetic force is generated. After sucking the medium powder in the medium storage through the magnetic conduction panel, the electromagnetic chuck rises from the medium storage and moves with the lifting and traveling mechanism to above the combined medium barrel, and demagnetization is achieved by cutting off the power supply of the exciting coil, and the medium powder adsorbed on the magnetic conduction panel is dropped into the combined medium barrel.

[0013] As a preferred technical solution of the present invention: The sensor unit includes a laser sensor, a displacement sensor, and a weighing sensor.

[0014] The laser sensor takes the highest point of the piled-up medium powder as the pickup point for the electromagnetic chuck to adsorb the medium powder and provides the position for the electromagnetic chuck to adsorb the medium powder; the displacement sensor is used to measure the traveling distance and lifting height of the electromagnetic chuck; the weighing sensor is used to feedback the gross weight and net weight of the electromagnetic chuck and sense the position of the electromagnetic chuck when it descends for work.

[0015] The main control cabinet controls the lifting mechanism to lower the electromagnetic chuck and drags the cable reel of the electromagnetic chuck. When the descending electromagnetic chuck touches the medium powder, the wire rope weighing sensor detects the weight change of the electromagnetic chuck, and the lifting mechanism stops descending. The electromagnetic chuck is energized to uniformly pick up the medium powder in the medium storage.

[0016] As an optimal technical solution of the utility model: the lifting and traveling mechanism includes: a lifting motor, a traveling motor, a reducer, a brake, a pulley hook, a wire rope, a rope winding device and a control unit; the control unit controls the soft start and soft stop of the lifting and traveling mechanism through a frequency converter, which is used to reduce the swing amplitude of the electromagnetic suction cup during walking, so that the electromagnetic suction cup moves smoothly; the traveling motor is a three-phase brake motor with a power of 0.22kw, and the lifting motor is a three-phase brake motor with a power of 4kw.

[0017] As a preferred technical solution of the utility model: the density meter is a differential pressure transmitter, which outputs the measured actual density value of the heavy suspension in the production system to the main control cabinet in the form of an analog signal; the main control cabinet compares the actual density value of the heavy suspension measured by the density meter with a given value, and inputs an analog electrical signal to the intelligent regulating valve; the intelligent regulating valve converts the electrical signal output by the main control cabinet into force or displacement in proportion, and continuously controls the flow parameters of the clean water before the pump that needs to be added by using the electrical signal analog quantity, thereby adjusting the density of the heavy suspension in the production system.

[0018] As an optimal technical solution of the utility model: the main control cabinet is based on a human-machine interface, and a programmable controller is used to automatically control the lifting travel mechanism and the electromagnetic suction cup through manual, automatic or remote control modes, including: the moving direction, distance and speed of the lifting travel mechanism, the lifting and lowering of the electromagnetic suction cup, and the adsorption or dropping of medium powder.

[0019] Compared with the prior art, the utility model adopts the above technical solution and has the following technical effects:

[0020] 1. The heavy medium intelligent adding system of the utility model realizes unmanned fully automated operation. The system runs fully automatically, which reliably ensures the stability of the density of the heavy suspension in the coal washing system, effectively reduces job and operation risks, avoids the economic losses caused by market disputes due to untimely manual addition, resulting in low system density and unqualified coal washing product indicators, improves the stability of density control in heavy medium coal preparation plants, ensures the accuracy of heavy medium coal preparation technology, and increases the economic and social benefits of coal preparation plants.

[0021] 2. The lifting and walking mechanism in the heavy medium intelligent adding system of the utility model is controlled by a frequency converter, which can realize soft start and soft stop, and play a role in stable operation to reduce the swing amplitude of the electromagnet when it is walking, so as to avoid excessive shaking of the electromagnetic suction cup, which may cause pulling of cables or collision with the wall of the medium warehouse. The electromagnetic suction cup selects the highest point of the medium powder warehouse for adsorption, so as to ensure uniform inventory and avoid collapse caused by high drop due to too high or too low medium powder. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a structural diagram of the heavy medium intelligent adding system of the utility model;

[0023] Symbols in the figure: 11 - density meter, 12 - intelligent regulating valve, 21 - lifting and traveling mechanism, 22 - electromagnetic chuck, 23 - cable coil, 24 - track, 31 - laser sensor, 32 - displacement sensor, 33 - weighing sensor, 41 - main control cabinet, 42 - auxiliary control cabinet, 51 - medium storage, 52 - combined medium tank, 53 - raw water from water pump, 54 - to three-product dense medium cyclone. Specific implementation mode

[0024] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0025] In an embodiment of the present invention, a dense medium intelligent addition system, as Figure 1 shown, includes: a density meter 11, an intelligent regulating valve 12, a lifting and traveling mechanism 21, an electromagnetic chuck 22, a cable coil 23, a track 24, a sensor unit, a main control cabinet 41, an auxiliary control cabinet 42, and a 5G industrial communication module.

[0026] In this embodiment, the above-mentioned dense medium intelligent addition system is applied to the production system to automatically add medium powder and water to the production system to ensure the stability of the density of the heavy suspension in the coal washing system. Among them, the production system includes: a medium storage 51, a combined medium tank 52, raw water from a water pump 53, and a three-product dense medium cyclone 54.

[0027] Specifically, in this embodiment, the density meter 11 is essentially a differential pressure transmitter. Its working principle is that the pressure generated by a liquid column of a certain height is proportional to the density of the liquid. According to the pressure value measured by the pressure instrument, under the condition that the gravitational acceleration at the measurement location and the height of the liquid column are known, the density of the measured liquid can be obtained, and the measurement result is output as an analog signal.

[0028] During use, the density meter 11 is connected to the production system to measure the density of the heavy suspension in the production system in real time. The density meter outputs the actual density value of the heavy suspension measured to the main control cabinet 41 as an analog signal; the main control cabinet 41 compares the actual density value of the heavy suspension measured by the density meter 11 with the given value and inputs an analog electrical signal to the intelligent regulating valve 12.

[0029] Specifically, in this embodiment, the intelligent regulating valve 12 is also called a proportional valve, which converts the input electrical signal into force or displacement in proportion and continuously adjusts and controls parameters such as pressure and flow using the analog quantity of the electrical signal.

[0030] The intelligent regulating valve 12 is installed between the water supply pipe before the pump and the combined medium barrel 52 in the production system. The water supply pipe before the pump receives the water 53 from the clean water pump and flows through the intelligent regulating valve 12 to the three-product dense medium cyclone 54. The intelligent regulating valve 12 adjusts the density of the heavy suspension liquid in the production system by controlling the amount of clean water before the pump added.

[0031] During use, the main control cabinet 41 inputs an analog electrical signal to the intelligent regulating valve 12. The intelligent regulating valve 12 converts the received electrical signal into force or displacement in proportion, and continuously controls the flow parameters of the clean water before the pump that needs to be added by using the analog quantity of the electrical signal, realizing the automatic opening and closing of the intelligent regulating valve 12 and adjusting the density of the heavy suspension liquid in the production system.

[0032] When the density exceeds the given value, the valve opens, increasing the amount of clean water before the pump and reducing the density of the heavy suspension liquid after the pump. When the density is lower than the set value, the valve adjusts the opening degree to reduce the amount of clean water. The opening and closing adjustment of the intelligent valve plays a role in stabilizing the density. When the heavy suspension liquid is still lower than the given density after the operation result is automatically adjusted, the intelligent medium adding system automatically starts to add medium powder to increase the density of the heavy suspension liquid in the production system.

[0033] Specifically, in this embodiment, the track 24 is arranged above the medium library 51 and the combined medium barrel 52 in the production system. The lifting and traveling mechanism 21 is suspended below the track 24 and moves along the track 24. The electromagnetic chuck 22 is connected below the lifting and traveling mechanism 21 and adsorbs the medium powder in the medium library 51 by lifting, lowering and moving through the lifting and traveling mechanism 21, and drops the medium powder into the combined medium barrel 52.

[0034] The electromagnetic chuck 22 is based on the principle of electromagnetic induction and consists of a disc-shaped steel shell and an exciting coil inside the shell, and is used to absorb ferromagnetic materials, that is, medium powder.

[0035] During use, the electromagnetic chuck 22 adsorbs the medium powder in the medium library 51 and "transports" the internal medium powder into the combined medium barrel 52. When the electromagnetic chuck 22 moves up and down, its power cord is automatically wound into or out of the cable coil 23 according to the cable tension. When the exciting coil is energized with direct current, a magnetic force is generated and it descends to the medium library 51. After absorbing the medium powder in the medium library 51 through the magnetic conductive panel, the electromagnetic chuck 22 rises from the medium library 51 and moves to the upper part of the combined medium barrel 52 along with the lifting and traveling mechanism 21. By cutting off the power supply of the exciting coil, the magnetic force disappears, demagnetization is realized, and thus the material is removed, and the medium powder adsorbed on the magnetic conductive panel is dropped into the combined medium barrel 52.

[0036] Furthermore, the sensor unit is arranged on the lifting and traveling mechanism and is used to scan the inventory status of the medium powder in the medium library in the production system, measure the traveling distance, lifting height of the electromagnetic chuck and the weight of the adsorbed medium powder, and send the data to the auxiliary control cabinet.

[0037] Specifically, in this embodiment, the sensor unit includes a laser sensor 31, a displacement sensor 32, and a weighing sensor 33.

[0038] During use, the laser sensor 31 emits laser light to scan and model the material inventory in the media library 51. Through the auxiliary control cabinet, the highest point of the media powder accumulation is used as the "pick-up point" for the electromagnetic chuck to adsorb the media powder, achieving uniform "pick-up" of the media powder in the inventory 51.

[0039] The displacement sensor 32 converts the measurement result of the wire rope length into an electrical signal to achieve digital transmission, and is used to measure the traveling distance and lifting height of the electromagnetic chuck 22, facilitating the program to position the movement of each mechanical part and limiting the traveling and lifting ranges to prevent the equipment from exceeding the limit and causing equipment damage.

[0040] The weighing sensor 33 converts the tension of the wire rope into an electrical signal to achieve weight digital transmission, and is used to feedback the gross weight and net weight of the electromagnetic chuck 22 and sense the "material pick-up position" when the electromagnetic chuck 22 descends, preventing the descent from exceeding the limit and causing the wire rope to come out of the groove and damage the equipment. By detecting the weight borne by the hoisting rope, it is also the core component of the weighing and metering function.

[0041] Specifically, in this embodiment, the lifting and traveling mechanism 21 drives the gear transmission device based on the rotation of the motor to raise or lower the hook, realizing operations such as lifting, lowering, moving, and hovering of the item. It mainly consists of a lifting motor, a traveling motor, a reducer, a brake, a pulley hook, a wire rope, a rope coiling device, and a frequency converter control system.

[0042] Particularly, in this embodiment, the traveling motor is a three-phase braking motor with a power of 0.22 kw, and the lifting motor is a three-phase brake motor with a power of 4 kw.

[0043] During use, the lifting and traveling mechanism 21 lifts, lowers, and moves the electromagnetic chuck 22, and transports the media powder adsorbed by the electromagnetic chuck 22 in the media library 51 into the qualified combined medium barrel 52. Among them, the lifting and traveling mechanism 21 is controlled by a frequency converter, improving the lifting and traveling smoothness, reducing the swinging amplitude of the electromagnetic chuck 22, and enhancing the overall stability of the equipment.

[0044] Specifically, in this embodiment, the 5G industrial communication module is based on a 5G industrial router to achieve wireless communication between the main control cabinet 41 and the auxiliary control cabinet 42. Using 5G wireless communication technology to replace the traditional physical control line, it avoids the line faults that occur when the lifting and traveling mechanism 21 drags cables during operation.

[0045] Specifically, in this embodiment, two sets of control cabinets are selected. The main control cabinet 41 is fixedly installed on the wall and is responsible for signal input. The auxiliary control cabinet 42 is installed on the track or the lifting and traveling mechanism 21 and runs following the lifting and traveling mechanism 21, and is used to be responsible for signal output. The two sets of control cabinets use wireless communication technology to replace the traditional physical control lines, reducing line failures.

[0046] Furthermore, the main control cabinet 41 is an automated control system implemented by a programmable logic controller (PLC) based on a human-machine interface, including: the moving direction, distance, and speed of the lifting and traveling mechanism, the lifting and lowering of the electromagnetic chuck, and the adsorption or dropping of the medium powder.

[0047] Furthermore, the main control has manual, automatic, and remote control modes.

[0048] Manual mode: The working mode achieved by the on-site operator through step-by-step operations on the touch screen.

[0049] Automatic mode: The automatic working mode achieved according to the density in the qualified medium tank of the production process system.

[0050] Remote mode: The remote visual operation achieved by the production scheduling room according to the actual production situation through the on-site monitoring camera and operating the production centralized control system.

[0051] In summary, the heavy medium intelligent addition system of the present utility model realizes unmanned full automation operation, effectively reduces the on-site and operation risks, improves the stability of density control in the heavy medium coal preparation plant, ensures the accuracy of the heavy medium coal preparation process, and increases the economic and social benefits of the coal preparation plant.

[0052] The above are only the preferred embodiments of the present utility model. It should be noted that: for those of ordinary skill in the art in this technical field, without departing from the principle of the present utility model, several improvements and refinements can still be made, and these improvements and refinements should also be regarded as the protection scope of the present utility model.

Claims

1. A heavy medium intelligent addition system, characterized in that: include: Density meter, intelligent regulating valve, electromagnetic chuck, cable reel, sensor unit, lifting travel mechanism, track, 5G industrial communication module, main control cabinet and auxiliary control cabinet; The density meter is connected to the production system, measures the density of the heavy suspension in the production system in real time, and outputs it to the main control cabinet, which controls the automatic opening and closing of the intelligent regulating valve; the intelligent regulating valve is installed between the water supply pipe before the pump and the combination barrel in the production system, and adjusts the density of the heavy suspension in the production system by controlling the amount of clean water added before the pump; The track is arranged above the medium storage and the combined medium barrel in the production system, and the lifting and walking mechanism is suspended below the track and moves along the track; The electromagnetic suction cup is connected to the bottom of the lifting and traveling mechanism, moves with the lifting and traveling mechanism, and is lifted and lowered by the cable reel arranged on the lifting and traveling mechanism, so as to absorb the medium powder in the medium reservoir and drop the medium powder into the combined medium barrel; The auxiliary control cabinet and the sensor unit are arranged on the lifting travel mechanism or the track, and the sensor unit is used to scan the inventory status of the medium powder in the medium library of the production system, measure the travel distance, lifting and lowering height of the electromagnetic chuck, and the weight of the sucked medium powder, and send the data to the auxiliary control cabinet; The auxiliary control cabinet is connected to the main control cabinet through a 5G industrial communication module to output the signal; the main control cabinet receives the signal and automatically controls the lifting walking mechanism and the electromagnetic suction cup through a programmable controller.

2. The heavy medium intelligent adding system according to claim 1, characterized in that: The electromagnetic suction cup is based on the principle of electromagnetic induction and consists of a disc-shaped steel shell and an excitation coil inside the shell. When direct current is passed through the excitation coil, magnetic force is generated. After the medium powder in the medium reservoir is absorbed by the magnetic conductive panel, the electromagnetic suction cup rises from the medium reservoir and moves to the top of the medium barrel along with the lifting walking mechanism. Demagnetization is achieved by cutting off the power of the excitation coil, and the medium powder absorbed on the magnetic conductive panel falls into the medium barrel.

3. The heavy medium intelligent addition system according to claim 2, characterized in that: The sensor unit includes a laser sensor, a displacement sensor, and a weighing sensor; The laser sensor uses the highest point of the medium powder accumulation as the pickup point for the electromagnetic chuck to absorb the medium powder, and provides the position of the electromagnetic chuck to absorb the medium powder; the displacement sensor is used to measure the travel distance and lifting height of the electromagnetic chuck; the weighing sensor is used to feedback the gross weight and net weight of the electromagnetic chuck, and sense the position of the electromagnetic chuck when it descends; The main control cabinet controls the lifting mechanism to lower the electromagnetic chuck and drag the electromagnetic chuck cable reel. When the descending electromagnetic chuck touches the medium powder, the wire rope weighing sensor detects the weight change of the electromagnetic chuck, the lifting mechanism stops descending, the electromagnetic chuck is energized, and the medium powder in the medium reservoir is evenly picked up.

4. The heavy medium intelligent addition system according to claim 2, characterized in that: The lifting and traveling mechanism includes: a lifting motor, a traveling motor, a reducer, a brake, a pulley hook, a wire rope, a rope winding device and a control unit; the control unit controls the soft start and soft stop of the lifting and traveling mechanism through a frequency converter, which is used to reduce the swing amplitude of the electromagnetic suction cup during walking and make the electromagnetic suction cup move smoothly; the traveling motor is a three-phase brake motor with a power of 0.22kw, and the lifting motor is a three-phase brake motor with a power of 4kw.

5. The heavy medium intelligent adding system according to claim 1, characterized in that: The density meter is a differential pressure transmitter, which outputs the measured actual density value of the heavy suspension in the production system to the main control cabinet in the form of an analog signal; the main control cabinet compares the actual density value of the heavy suspension measured by the density meter with a given value, and inputs an analog electrical signal to the intelligent regulating valve; the intelligent regulating valve converts the electrical signal output by the main control cabinet into force or displacement in proportion, and continuously controls the flow parameters of the clean water in front of the pump that need to be added by using the electrical signal analog quantity, thereby adjusting the density of the heavy suspension in the production system.

6. The heavy medium intelligent adding system according to claim 1, characterized in that: The main control cabinet is based on a human-machine interface, and a programmable controller is used to automatically control the lifting travel mechanism and the electromagnetic suction cup through manual, automatic or remote control modes, including: the moving direction, distance and speed of the lifting travel mechanism, the lifting and lowering of the electromagnetic suction cup, and the adsorption or dropping of medium powder.

Images