CN207317892U - Concentrator material position and measurement of concetration integrated device - Google Patents

Abstract

The utility model discloses a kind of concentrator material position and measurement of concetration integrated device, including executing agency, testing agency and processing and indication mechanism, the executing agency includes weight, reel, pulley and servomotor, testing agency includes lever, pressure sensor and encoder, and processing and indication mechanism include PLC controller and display；One end connection of the weight and rope, the other end of rope bypass pulley after on reel, reel is connected with servo motor transmission, driven and operated by servomotor, the pulley is connected to one end of lever, and pressure sensor is connected to the other end of lever, the encoder is arranged at reel, the number of turns turned over for recording reel, pressure sensor and encoder are connected with PLC controller, PLC controller connection display.The utility model at the same time can measure sedimentary material position and material concentration in Paste thickener, and reasonable in design, measurement cost is low.

Description

Thickener material level and concentration measurement integrated device

technical field

The utility model relates to an integrated device for measuring material level and concentration in a thickener, which belongs to the field of material level and concentration measuring devices for sedimentary layers formed during pulp dehydration.

Background technique

Thickener is a kind of dehydration equipment widely used in metallurgy, chemical industry, coal, non-metallic mineral processing, environmental protection and other industries, and is used for the treatment of concentrate and tailings in the mineral processing industry. The paste thickener is improved on the basis of the thickener, and it is a new type of dehydration equipment combined with the filter characteristics of the mud layer, which has higher efficiency and better product quality. As shown in Figure 1, during operation, the slurry flows in from the upper part of the paste thickener and flows out from the bottom outlet of the lower part, and finally forms three layers in the paste thickener, namely clear water layer, transition layer and sedimentary layer. The slurry is separated from the material and water in the transition layer, the denser material descends to form a sediment layer, and the water goes up due to the settlement to form a clear water layer, and finally discharged from the overflow.

The concentration of materials at different heights in the thickener is different. According to the analysis, there is no material in the clear water layer; the material concentration in the transition layer increases slightly with the increase of depth, but the increase is not large and unstable; As the depth increases, the material concentration increases, and the change presents a certain regularity.

The underflow concentration of the paste thickener is a relatively important indicator in the concentrator. In industrial production, it is necessary to monitor the underflow concentration (the concentration of the underflow outlet) in real time to ensure the stability of the underflow concentration. From the relationship between the underflow concentration of the thickener and the height of the sediment layer in the thickener, it can be seen that the higher the sediment layer, the greater the concentration of the underflow of the thickener. Therefore, it is extremely important to accurately measure the height of the sediment layer in the paste thickener to ensure the stability of the concentration at the bottom outlet. In addition, it is particularly necessary to measure the concentration of materials at different positions in the paste thickener. At present, there are many methods and equipment for measuring the concentration of materials at different positions in the thickener. In some cases, the slurry is taken out from the side of the equipment and then tested and analyzed by the equipment. Some use some high-precision equipment to measure directly. These methods have high requirements on equipment, resulting in relatively high cost of measurement.

Utility model content

Based on the above technical problems, the utility model provides an integrated device for measuring the material level and concentration of a thickener.

The technical solution adopted in the utility model is:

An integrated device for measuring the material level and concentration of a thickener, including an actuator, a detection mechanism, and a processing and display mechanism. The actuator includes a weight, a winding wheel, a pulley, and a servo motor. The processing and display mechanism includes a PLC controller and a display; the weight is connected to one end of the rope, and the other end of the rope goes around the pulley and is wound on the reel, and the reel is connected to the servo motor drive, and the servo The motor drives the operation, the pulley is connected to one end of the lever, the pressure sensor is connected to the other end of the lever, and the encoder is arranged at the reel to record the number of turns of the reel. Both the pressure sensor and the encoder are It is connected with the PLC controller, and the PLC controller is connected with the display.

Preferably, the inside of the weight is hollow, and the weight includes an upper half of the hammer body and a lower half of the hammer body, and the upper half of the hammer body and the lower half of the hammer body are connected by threads.

Preferably, a suspension ring is connected to the top of the upper half of the hammer body.

Preferably, the lever includes a rod body and a fulcrum, an adjustment rod is connected to one end of the rod body, fixing holes are arranged at intervals on the rod body and the adjustment rod, the pulley is connected to one end of the rod body, and the other end of the rod body is connected to the adjustment rod. One end is connected by a bolt, the bolt is inserted into the fixing hole, and the pressure sensor is connected to the other end of the adjusting rod.

The beneficial technical effect of the utility model is:

1. The utility model can be used to measure the phase interface position of the mixed liquid containing water-solid two-phase ore slurry in the paste thickener, and can simultaneously measure the material level and material concentration of the sediment layer in the paste thickener, although it is aimed at The measurement environment is relatively complicated, but through the design of ingenious and novel devices and methods, it has achieved high measurement accuracy and can greatly reduce the measurement cost and other beneficial effects.

2. The utility model designs a lever mechanism, which can amplify or reduce the pressure change at the hammer according to the different types of materials in the thickener, so that the signal of the pressure change is always within the reasonable and measurable range of the pressure sensor , increasing the optional range of sensor types and sizes, providing great convenience for measurement.

3. The heavy hammer in the device of the utility model adopts a hollow design, and other media can be added into it according to the different types of materials or when the quality of the heavy hammer needs to change without changing the volume of the heavy hammer, so that the heavy hammer The buoyancy of the hammer in the medium of the same density is a constant, which reduces the existence of errors; and the quality of the weight is designed to be variable, which can increase the range and occasions of use of the device and prolong the life of the device.

Description of drawings

Below in conjunction with accompanying drawing and specific embodiment the utility model is further described:

Fig. 1 is a simple schematic diagram of the working process of the paste thickener;

Fig. 2 is the structural principle schematic diagram of the utility model device;

Fig. 3 is a structural schematic diagram of the weight in the device of the present invention.

Detailed ways

In conjunction with the accompanying drawings, a thickener material level and concentration measurement integrated device includes an actuator, a detection mechanism, and a processing and display mechanism. The actuator includes a weight 1, a winding wheel 2, a pulley 3 and a servo motor 8. The detection The mechanism includes a lever 4 , a pressure sensor 5 and an encoder 9 , and the processing and display mechanism includes a PLC controller 6 and a display 7 . The weight 1 is connected to one end of the rope 10, and the other end of the rope 10 is wound around the pulley 3 and then wound on the reel 2, and the reel 2 is connected with the servo motor 8, and the servo motor 8 is driven to run. The pulley 3 is connected to one end of the lever 4, the pressure sensor 5 is connected to the other end of the lever 4, and the encoder 9 is arranged at the reel 2 for recording the number of turns of the reel 2. The pressure sensor Both 5 and the encoder 9 are connected with the PLC controller 6, and the PLC controller 6 is connected with the display 7.

As a further design of the present utility model, the inside of the heavy hammer 1 is hollow, and the heavy hammer 1 includes an upper half hammer body 101 and a lower half hammer body 102, between the upper half hammer body 101 and the lower half hammer body 102 Detachable, the two are connected by thread. A suspension ring 103 is connected to the top of the hammer body 101 in the upper half, which is convenient for hanging the rope 10 . The heavy hammer of the device of the utility model adopts a hollow design, and the quality of the heavy hammer itself can be adjusted without changing its own volume according to different working environments. Because the volume does not change, the buoyancy of the device itself does not change during the test, and the parameters of the controller do not need to be changed when changing the mass of the device itself, which increases the scope of application of the device.

Further, the lever 4 includes a rod body 401 and a fulcrum 402, an adjustment rod 403 is connected to one end of the rod body 401, and fixing holes 404 are arranged at intervals on the rod body 401 and the adjustment rod 403, and the pulley 3 and the rod body 401 One end is connected, the other end of the rod body 401 is connected with one end of the adjusting rod 403 by a bolt, and the bolt is inserted into the fixing hole, and the pressure sensor 5 is connected to the other end of the adjusting rod 403 . The lever structure designed by the device of the utility model can adjust the sensitivity and test range of the measuring device. When the working environment changes, it is only necessary to adjust the length of the lever, and there is no need to worry that the change of the pressure exceeds the sensing range of the pressure sensor.

The general steps of the method for measuring the material level and concentration in the thickener by using the above-mentioned device are as follows:

a material level measurement

a1 controls the fall of the weight 1, and the encoder 9 will record the number of turns of the winding wheel 2 in real time during the fall of the weight 1, and then transmit the data to the PLC controller 6, which will be converted into the current weight by the PLC controller 6 1 height.

a2 At the same time, the pressure sensor 5 measures the pressure value in real time. Design when the pressure value measured by the pressure sensor reaches the set value (for example, the set value can be set to 0), or design when the difference between the front and rear pressure values measured by the pressure sensor within a certain time interval reaches the set value (For some materials, the pressure value measured by the pressure sensor at the junction of the transition layer and the sediment layer will have a more obvious change), the weight 1 is just at the junction of the transition layer and the sediment layer in the thickener, at this time The pressure sensor 5 transmits a signal to the PLC controller 6, and the PLC controller 6 controls the servo motor 8 to stop, and outputs the signal in the encoder 9 as the height value of the weight at this time, and displays it on the display 7 at the same time. The material level height of the sediment layer is the difference obtained by subtracting the height of the weight at this time from the height of the concentration machine.

a3 Finally, the PLC controller 6 controls the servo motor 8 to reverse and return to the original position, thereby completing a process of material level measurement.

b concentration measurement

b1 controls the weight to drop. During the weight drop, the encoder will record the number of turns of the winding wheel in real time, and then transmit the data to the PLC controller, which will convert it into the current height of the weight.

b2 At the same time, the pressure sensor measures the pressure value in real time; the force analysis is carried out on the weight. The buoyancy of the weight is the difference between its own gravity and the pressure value measured by the pressure sensor in real time, and the buoyancy is proportional to the density of the material. Thus, the density of the material layer where the weight is located can be calculated, that is, the concentration of the material at different heights can be obtained through the PLC controller, and displayed on the display in the form of a table or a curve.

In the above method, according to the different types of materials in the thickener, weights of different masses can be filled inside the weight, so as to change the mass of the weight while keeping the volume of the weight constant.

In the above method, according to the different types of materials in the thickener, the lever can be adjusted to amplify or reduce the pressure change at the weight, so that the pressure change signal is always within the reasonable and measurable range of the pressure sensor.

The following is a supplementary description of the principle content of the utility model for material level and concentration measurement:

Material level measurement principle:

The concentration of materials at different positions in the paste thickener is different, which will inevitably lead to different densities of materials at different positions, so the buoyancy of the same volume objects in different positions of the paste thickener is also different. The principle of the device of the utility model is exactly to judge the position of the heavy hammer by utilizing the different buoyancy of the heavy hammer at different positions. The heavy hammer is subjected to its own gravity, the buoyancy of the material and the pulling force connected to the heavy hammer in the paste thickener, and the pulling force is obtained by the pressure sensor.

In the paste thickener, for the treatment of some materials, the pressure does not change when the weight is in the clear water or the transition layer; when the weight is in the sediment layer, the change of pressure and depth shows a linear relationship; There will be a sudden change in pressure at the junction of the clear water layer and the transition layer and the junction of the transition layer and the sedimentary layer, and the sudden change is relatively large at the junction of the transition layer and the sedimentary layer. There is a sudden change because the density of the slurry on both sides of the junction is different and the density difference is relatively large, so there will be a sudden change in the buoyancy when it is on both sides.

When the force felt from the weight has a relatively large mutation, it can be considered that the position of the weight at this time is the junction of the transition layer and the sedimentary layer. The pressure value or pressure difference at this time can be input into the plc controller, and when the pressure value or pressure difference reaches this value, output the distance traveled by the weight at this time, then subtract it from the total height of the thickener The distance traveled by the hammer is the height of the sediment layer in the thickener.

Concentration measurement principle:

It has been mentioned above that the pressure and concentration of the weight are different when the hammer is at different positions in the thickener. The pressure value can be easily obtained by the pressure sensor, so it is considered to use the pressure value to represent the concentration of the material at the corresponding position. This device uses this principle to measure the concentration at different positions of the thickener.

Due to the large change in concentration during the deposition layer, the pressure sensed by the weight will also change greatly. The utility model uses this phenomenon to convert the pressure change signal into the corresponding concentration value through the function of the plc controller. Specifically The functional relationship can be determined through previous experiments and then input into the PLC controller, so that the measurable pressure change can be used to characterize the difficult-to-measure material concentration.

The device of the utility model judges the level of the material or the concentration of the material by utilizing the change of the pressure during the falling process of the weight. There are two switches at the PLC controller, which are material level switch and concentration switch. When the weight is on the material level switch, the display will display the current height of the weight when the weight is falling. When the weight reaches the junction of the transition layer and the deposition layer, the pressure change reaches the maximum, and the pressure sensor sends an electrical signal The form is transmitted to the PLC controller, the PLC controller controls the servo motor to stop, and outputs the signal in the encoder to display the height of the hammer at this time on the display, and controls the servo motor to reverse back to the original position to complete a The process of measurement, which can measure the position of the junction between the transition layer and the deposition layer in the thickener.

When the switch is at the concentration position, the controller will continuously convert the signal in the encoder into a corresponding height signal during the descent of the weight, and at the same time the pressure sensor will transmit the measured pressure value to the PLC controller, and from the display middle output, so as to realize the determination of the concentration of materials at different heights.

Relevant technical contents not mentioned in the above methods can be realized by adopting or referring to existing technologies.

It should be noted that under the teaching of this specification, any equivalent replacement or obvious modification made by those skilled in the art shall fall within the protection scope of the present utility model.

Claims (3)

1. A thickener material level and concentration measurement integrated device is characterized in that: it includes an executive mechanism, a detection mechanism and a processing and display mechanism, the executive mechanism includes a weight, a winding wheel, a pulley and a servo motor, and the detection mechanism includes Lever, pressure sensor and encoder, processing and display mechanism including PLC controller and display; the weight is connected to one end of the rope, and the other end of the rope is wound around the pulley and wound on the winding wheel, and the winding wheel and the servo The motor is connected by transmission and driven by a servo motor. The pulley is connected to one end of the lever, and the pressure sensor is connected to the other end of the lever. The encoder is arranged at the reel to record the number of turns of the reel. Both the pressure sensor and the encoder are connected with the PLC controller, and the PLC controller is connected with the display. 2. An integrated device for measuring material level and concentration of thickener according to claim 1, characterized in that: the inside of the weight is hollow, the weight includes an upper half hammer body and a lower half hammer body, the upper half Part of the hammer body and the lower half of the hammer body are connected by threads. 3. An integrated device for measuring the material level and concentration of a thickener according to claim 1, characterized in that: the lever includes a rod body and a fulcrum, an adjustment rod is connected to one end of the rod body, and the rod body and the adjustment rod are evenly spaced A fixing hole is provided, the pulley is connected to one end of the rod body, the other end of the rod body is connected to one end of the adjusting rod through a bolt, the bolt is inserted into the fixing hole, and the pressure sensor is connected to the other end of the adjusting rod.