CN111318376A - Automatic liquid level control device for slurry tank of flotation machine - Google Patents
Automatic liquid level control device for slurry tank of flotation machine Download PDFInfo
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- CN111318376A CN111318376A CN202010239847.0A CN202010239847A CN111318376A CN 111318376 A CN111318376 A CN 111318376A CN 202010239847 A CN202010239847 A CN 202010239847A CN 111318376 A CN111318376 A CN 111318376A
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- liquid level
- plc
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- flotation machine
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D1/00—Flotation
- B03D1/14—Flotation machines
- B03D1/1493—Flotation machines with means for establishing a specified flow pattern
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Abstract
A flotation machine slurry tank liquid level automatic control device relates to a device for automatically controlling the liquid level of a flotation process in a mineral separation workshop, and comprises a PLC control device, a laser liquid level detection device and a pneumatic actuating mechanism; the liquid level of the flotation machine in the flotation process can be continuously and stably controlled.
Description
Technical Field
The invention relates to a liquid level automatic control device, in particular to a device for automatically controlling the liquid level of a flotation process in a mineral separation workshop.
Background
The liquid level control of the flotation machine in the flotation process in the mineral separation workshop usually adjusts the opening degree of a valve of a tailing tank through a manual valve, an electric valve and the like, so that the liquid level of the flotation machine is manually controlled, the opening degree of a discharge valve is not timely adjusted after the grade of raw ore changes, the problems of overflowing, dropping, tailing running of concentrate and the like occur in the operation process, the process index is seriously influenced, the grade and the recovery rate of the concentrate are reduced, and the production benefit of enterprises is not facilitated.
Disclosure of Invention
The invention discloses an automatic liquid level control device for a slurry tank of a flotation machine, which can continuously and stably control the liquid level of the flotation machine in a flotation process.
In order to achieve the above purpose, the invention provides the following technical scheme:
an automatic liquid level control device for a slurry tank of a flotation machine comprises a PLC control device, a laser liquid level detection device and a pneumatic actuating mechanism; the PLC control device is composed of a PLC controller 1 and an HMI touch screen 5 in a combined mode, the pneumatic actuating mechanism comprises a lifting piston, a pneumatic adjusting valve 15 and a screw 14, the PLC controller 1 is connected with the pneumatic adjusting valve 15 through a cable, the pneumatic adjusting valve 15 controls the lifting of the lifting piston, the lifting piston is connected with the screw 14, the tail end of the screw 14 is connected with an ore discharging valve 12, the bottom end of the ore discharging valve 12 is an inverted cone, the diameter of the bottom of the inverted cone is larger than the diameter of an ore discharging port 11 at the bottom of an ore pulp tank of the flotation machine, the conical surface of the ore discharging valve 12 is inverted on the ore discharging port 11, and the ore discharging valve 12 controls the size of the gap opening of the ore discharging port 11 along with; the laser liquid level detection device is composed of a laser liquid level meter 6, a laser reflection disc 7, a floating ball 9, a connecting rod and a support 8, one end of the support 8 is fixed on the upper edge of a flotation machine slurry tank 13, the other end of the support 8 is provided with a small hole which extends to the position right above the flotation machine slurry tank 13, the connecting rod penetrates through the small hole of the support 8, the small hole supports the connecting rod, the connecting rod penetrates up and down in the small hole without swinging left and right, the laser reflection disc 7 and the floating ball 9 are respectively fixed at two ends of the connecting rod, the laser reflection disc 7 is arranged at the upper end, the floating ball 9 is arranged at the lower end and is arranged in the flotation machine slurry tank 13, the laser liquid level meter 6 is fixed right above the laser reflection disc 7, the PLC 1 is connected with the laser liquid level meter 6 through a cable, and the PLC 1 performs data closed-loop control on data transmitted by the After the treatment, an operation instruction is sent to the pneumatic regulating valve 15, so that the gap opening degree of the ore discharging valve 12 relative to the ore discharging port 11 is automatically controlled.
Further: the PLC control device has a PID control function and can modify PID parameters and calibrate upper and lower limits of liquid level through the HMI touch screen 5, and the PLC controller 1 is connected with the HMI touch screen 5 through an RS323 communication line 2.
Further: the PLC controller 1 is connected with a pneumatic regulating valve 15 through a four-core shielding cable 16, the pneumatic regulating valve 15 can receive a 4-20mA current signal output by the PLC controller 1, and the opening degree of the pneumatic regulating valve 15 can also be converted into a 4-20mA current signal to be transmitted to the PLC controller 1; the PLC controller 1 is connected with a laser liquid level meter 6 through a two-core shielding cable 3, the laser liquid level meter 6 can flexibly adjust upper and lower limit parameters of a liquid level and can transmit a 4-20mA current signal to the PLC controller 1.
Advantageous technical effects
The invention solves the problems of large pulp liquid level fluctuation, slot overflow, concentrate tailing leakage and the like of the flotation tank caused by the fact that the opening of the ore discharge valve of the flotation tank is not adjusted in time when the grade of the raw ore changes, can adjust the opening of the ore discharge valve in time, keeps the liquid level of the ore pulp tank stable for a long time, improves the grade of the concentrate, enhances the stability of the ore dressing process and further improves the economic benefit of enterprises.
Drawings
FIG. 1 is a schematic diagram of the connection relationship of the present invention;
in the figure, 1-a PLC controller, 2-an RS323 communication line, 3-a two-core shielding cable line, 4-a process control box, 5-an HMI touch screen, 6-a laser liquid level meter, 7-a laser reflection disc, 8-a support, 9-a floating ball, 10-an ore inlet, 11-an ore outlet, 12-an ore outlet valve, 13-a flotation machine ore pulp tank, 14-a screw rod, 15-a pneumatic regulating valve and 16-a four-core shielding cable line.
Detailed Description
The invention is further described below with reference to the drawings and practical application of production.
Example 1: as shown in fig. 1, an automatic liquid level control device for a slurry tank of a flotation machine comprises a PLC control device, a laser liquid level detection device and a pneumatic actuating mechanism; the PLC control device is formed by combining a PLC controller 1 and an HMI touch screen 5, wherein the HMI touch screen 5 is installed on a process control box 4 and is used for displaying the actual liquid level of the flotation machine, displaying the opening degree of an ore discharge valve 12, setting PID automatic control parameters and giving a target liquid level; the pneumatic actuator comprises a lifting piston, a pneumatic adjusting valve 15 and a screw 14, the PLC 1 is connected with the pneumatic adjusting valve 15 through a cable, the pneumatic adjusting valve 15 controls the lifting of the lifting piston, the lifting piston is connected with the screw 14, the tail end of the screw 14 is connected with an ore discharging valve 12, the bottom end of the ore discharging valve 12 is an inverted cone, the diameter of the bottom of the inverted cone is larger than the diameter of an ore discharging port 11 at the bottom of an ore pulp tank of the flotation machine, the conical surface of the ore discharging valve 12 is inverted on the ore discharging port 11, and the ore discharging valve 12 controls the size of the gap opening of the ore discharging port 11 along with the lifting of the screw 14; the laser liquid level detection device is composed of a laser liquid level meter 6, a laser reflection disc 7, a floating ball 9, a connecting rod and a support 8, one end of the support 8 is fixed at the upper edge of a flotation machine slurry tank 13, the other end of the support 8 is provided with a small hole which extends to the position right above the flotation machine slurry tank 13, the connecting rod penetrates into the small hole of the support 8, the small hole supports the connecting rod, the connecting rod penetrates up and down in the small hole without swinging left and right, the laser reflection disc 7 and the floating ball 9 are respectively fixed at two ends of the connecting rod, the laser reflection disc 7 is arranged at the upper end, the floating ball 9 is arranged at the lower end and is arranged in the flotation machine slurry tank 13, the laser liquid level meter 6 is fixed right above the laser reflection disc 7, the PLC 1 is connected with the laser liquid level meter 6 through a cable, and the PLC 1 performs PID (proportion integration differentiation) control on data After the data processing, an operation instruction is sent to the pneumatic regulating valve 15, so that the size of the gap opening of the ore discharging valve 12 relative to the ore discharging port 11 is automatically controlled.
Example 2: the PLC control device comprises a PID control function and can carry out PID parameter modification and liquid level upper and lower limit calibration through the HMI touch screen 5 as in the embodiment 1, the PLC controller 1 and the HMI touch screen 5 are connected by an RS323 communication line 2, and the rest parts are the same.
Example 3: as in any one of embodiment 1 and embodiment 2, the PLC controller 1 is connected to a pneumatic control valve 15 through a four-core shielded cable 16, the pneumatic control valve 15 can receive a 4-20mA current signal output by the PLC controller 1, and the opening of the pneumatic control valve 15 can be converted into a 4-20mA current signal and transmitted to the PLC controller 1; the PLC controller 1 is connected with a laser liquid level meter 6 through a two-core shielding cable 3, the laser liquid level meter 6 can flexibly adjust upper and lower limit parameters of a liquid level and can transmit 4-20mA current signals to the PLC controller 1, and the rest parts are the same.
The working principle is as follows: in the embodiment, the flow rate of ore pulp at the ore inlet 10 is increased or decreased along with the change of the grade of raw ore, the generated concentrate foam is increased or decreased along with the change of the grade of the raw ore, the liquid level of the ore pulp in the pulp tank 13 of the flotation machine is increased or decreased, the laser reflecting disc 7 floats up and down under the combined action of the floating ball 9, the connecting rod and the bracket 8, and the value of the laser liquid level meter 6 is increased or decreased; when the pneumatic control valve 15 controls the pneumatic control valve 15 to move up and down, the opening degree of the pneumatic control valve 15 can be fed back to the PLC control device.
Since various modifications and equivalent substitutions and changes may be made without departing from the scope of the invention, it is intended that the invention not be limited to the particular embodiment disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.
Claims (3)
1. An automatic liquid level control device for a slurry tank of a flotation machine is characterized by comprising a PLC control device, a laser liquid level detection device and a pneumatic actuating mechanism; the PLC control device is composed of a PLC controller (1) and an HMI touch screen (5) in a combined mode, the pneumatic execution mechanism comprises a lifting piston, a pneumatic adjusting valve (15) and a screw rod (14), the PLC controller (1) is connected with the pneumatic adjusting valve (15) through a cable, the pneumatic adjusting valve (15) controls the lifting of the lifting piston, the lifting piston is connected with the screw rod (14), the tail end of the screw rod (14) is connected with an ore discharge valve (12), the bottom end of the ore discharge valve (12) is an inverted cone, the diameter of the bottom of the inverted cone is larger than that of an ore discharge port (11) at the bottom of an ore pulp tank of the flotation machine, the conical surface of the ore discharge valve (12) is inverted on the ore discharge port (11), and the ore discharge valve (12) controls the size of the gap opening of the ore discharge port (11) along with; the laser liquid level detection device is composed of a laser liquid level meter (6), a laser reflection disc (7), a floating ball (9), a connecting rod and a support (8), wherein one end of the support (8) is fixed on the upper edge of a flotation machine slurry tank (13), the other end of the support (8) is provided with a small hole which extends to the position right above the flotation machine slurry tank (13), the connecting rod penetrates into the small hole of the support (8), the small hole supports the connecting rod, the connecting rod penetrates up and down in the small hole without swinging left and right, the laser reflection disc (7) and the floating ball (9) are respectively fixed at two ends of the connecting rod, the laser reflection disc (7) is arranged at the upper end, the floating ball (9) is arranged at the lower end of the floating machine slurry tank (13), the laser liquid level meter (6) is fixed right above the laser reflection disc (7), the PLC (1) is connected with the laser liquid level meter (6) through a cable, and the PLC (1) carries out closed-loop control on data of the laser liquid level meter (6) by adopting a And after data processing, an operation instruction is sent to the pneumatic regulating valve (15), so that the opening degree of the gap of the ore discharge valve (12) relative to the ore discharge port (11) is automatically controlled.
2. The automatic liquid level control device for the slurry tank of the flotation machine according to claim 1, wherein the PLC control device has a PID control function and can carry out PID parameter modification and liquid level upper and lower limit calibration through the HMI touch screen (5), and the PLC controller (1) is connected with the HMI touch screen (5) through an RS323 communication line (2).
3. The automatic control device for the liquid level of the slurry tank of the flotation machine according to any one of the claims 1 or 2, characterized in that the PLC (1) is connected with a pneumatic regulating valve (15) through a four-core shielding cable (16), the pneumatic regulating valve (15) can receive a 4-20mA current signal output by the PLC (1), and the opening degree of the pneumatic regulating valve (15) can be converted into a 4-20mA current signal to be transmitted to the PLC (1); the PLC controller (1) is connected with the laser liquid level meter (6) through the two-core shielding cable (3), the laser liquid level meter (6) can flexibly adjust upper and lower limit parameters of a liquid level and can transmit a 4-20mA current signal to the PLC controller (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010239847.0A CN111318376A (en) | 2020-03-31 | 2020-03-31 | Automatic liquid level control device for slurry tank of flotation machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010239847.0A CN111318376A (en) | 2020-03-31 | 2020-03-31 | Automatic liquid level control device for slurry tank of flotation machine |
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| Publication Number | Publication Date |
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| CN111318376A true CN111318376A (en) | 2020-06-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010239847.0A Pending CN111318376A (en) | 2020-03-31 | 2020-03-31 | Automatic liquid level control device for slurry tank of flotation machine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115518774A (en) * | 2022-09-28 | 2022-12-27 | 昆明理工大学 | Flotation machine for improving flotation quality |
-
2020
- 2020-03-31 CN CN202010239847.0A patent/CN111318376A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115518774A (en) * | 2022-09-28 | 2022-12-27 | 昆明理工大学 | Flotation machine for improving flotation quality |
| CN115518774B (en) * | 2022-09-28 | 2024-04-26 | 昆明理工大学 | Flotation machine for improving flotation quality |
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