Liquid level detection device of flotation machine

Abstract

The utility model relates to the technical field of preparation equipment, and provides a liquid level detection device of a flotation machine, which comprises a flotation main body provided with a flotation tank, and the flotation tank is sequentially divided into a foam area and an ore pulp area from top to bottom; the detection pipe is statically arranged relative to the flotation body and connected with the ore pulp area through a first valve, and the first valve is used for controlling the communication relation between the detection pipe and the ore pulp area. The floating block is movably arranged in the detection pipe; the height detection piece is arranged on the detection pipe and used for detecting the height position of the floating block. By means of the technical scheme, the problems that in the prior art, due to the fact that a detection device is arranged in a flotation equipment tank body, foam is prone to adhering to the detection device, the requirement for high-precision online detection of the liquid level cannot be met, and overhauling steps are tedious are solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of ore dressing equipment, specifically, relates to a flotation machine liquid level detection device. BACKGROUND

[0002] Flotation is the use of the difference of mineral surface properties to realize the separation of useful minerals and waste minerals, and is the most effective separation method for the particle size less than 0.5mm. In the flotation process, a large number of bubbles are needed to form a stable froth layer above the ore pulp to realize the separation operation. Therefore, the flotation equipment tank body includes a froth layer and an ore pulp. In the actual production process, the liquid level height of the ore pulp is often detected and controlled to indirectly control the thickness of the froth layer, so as to avoid the influence of the too thin or too thick froth layer on the flotation effect and realize the index adjustment of the final product.

[0003] However, the online detection accuracy of the current flotation equipment for the ore pulp liquid level is poor, which specifically includes floating ball, ultrasonic wave, impedance and other means. The above methods often need to realize through the direct installation of the detection device inside the flotation equipment tank body. On the one hand, due to the continuous generation and rupture of the froth in the production process, the measurement accuracy of the ultrasonic wave, impedance and other methods will be directly affected. Moreover, under the shutdown state, the fine coal slime carried by the froth after the rupture will adhere to the floating ball, ultrasonic wave probe rod and other components, change the mass of the detection components, and also cause the subsequent measurement problem. On the other hand, since the detection device is directly installed inside the flotation equipment tank body, the ore pulp in the entire flotation equipment tank body needs to be emptied during maintenance, which causes unnecessary workload for the site workers. CONTENT OF THE UTILITY MODEL

[0004] The utility model provides a kind of flotation machine liquid level detection device, solve the form of detection device built-in in flotation equipment tank body in relevant technology, froth is easily adhered to detection device, cannot meet the requirement of high-precision online detection of liquid level, and the problem of complicated maintenance steps.

[0005] The technical scheme of the utility model is as follows:

[0006] A kind of flotation machine liquid level detection device, comprising:

[0007] Flotation main body, the flotation main body has flotation tank, the flotation tank is sequentially divided into froth zone and ore pulp zone from top to bottom;

[0008] Detection pipe and valve one, the detection pipe is relatively stationary set to the flotation main body, the valve one two ends are respectively communicated with the detection pipe and the ore pulp zone, and the valve one is used to control the communication relationship between the detection pipe and the ore pulp zone;

[0009] Floating block, the floating block is movably arranged in the detection pipe;

[0010] A height detection member is arranged on the detection tube to detect the height position of the float.

[0011] As a further technical solution, the height detection member is a Hall sensor, and the height detection member is arranged on the outer wall of the detection tube and located on one side of the float, further comprising:

[0012] A magnetic block is wrapped by the float, and the height detection member is used to detect the height position of the float through the magnetic force of the magnetic block.

[0013] As a further technical solution, the float is a polyurethane float, and the height detection member is a plurality of height detection members, and the plurality of height detection members are vertically spaced apart, further comprising:

[0014] A plurality of liquid level indicator lights are arranged on the outer wall of the detection tube, the liquid level indicator light is electrically connected with the height detection member, and the liquid level indicator light is one-to-one corresponding to the height detection member.

[0015] As a further technical solution, further comprising:

[0016] A limiting plate is arranged on the inner wall of the detection tube, and the plurality of height detection members are located above the limiting plate, and the limiting plate is used to support the float after shutdown.

[0017] As a further technical solution, the limiting plate is annular, further comprising:

[0018] A first cleaning nozzle and a second cleaning nozzle are arranged on the detection tube, the limiting plate is located between the first cleaning nozzle and the second cleaning nozzle, and the first cleaning nozzle and the second cleaning nozzle are both directed towards the limiting plate, and the first cleaning nozzle and the second cleaning nozzle are respectively used to clean the bottom and top of the float.

[0019] As a further technical solution, further comprising:

[0020] A contrast detection member is arranged on the top of the detection tube and located directly above the float, the contrast detection member is an ultrasonic sensor, and the contrast detection member is higher than the top of the ore pulp area, and the contrast detection member is used to detect the height difference between the contrast detection member and the float.

[0021] As a further technical solution, further comprising:

[0022] A third cleaning nozzle is arranged on the top of the detection tube and located on one side of the contrast detection member, and the third cleaning nozzle is used to clean the top of the float.

[0023] As a further technical solution, it also includes:

[0024] A defoaming pipe, the detection pipe is communicated with one end of the valve one through the defoaming pipe, the top of the defoaming pipe is provided with a foam overflow port, the top of the detection pipe is provided with an inspection port, and the detection pipe and the defoaming pipe are vertically arranged.

[0025] As a further technical solution, the defoaming pipe and the detection pipe form a U-shaped pipe, the bottom of the U-shaped pipe is provided with a blowdown port, and the U-shaped pipe further includes:

[0026] A valve two is arranged at the blowdown port.

[0027] As a further technical solution, the ore pulp area is provided with a communication port, the defoaming pipe is provided with an inlet near the valve one, the other end of the valve one is communicated with the ore pulp area through the communication port, and the U-shaped pipe further includes:

[0028] A fairing is arranged at the communication port and located in the ore pulp area, and is used for blocking the foam.

[0029] A guide plate is arranged at the inlet and located in the defoaming pipe, and is used for guiding the foam to the foam overflow port.

[0030] The working principle and beneficial effects of the utility model are as follows:

[0031] 1. Improve the detection precision:

[0032] The detection pipe is externally arranged and indirectly connected with the ore pulp area through the valve, so that the continuous generation and rupture of the foam in the production process directly interfere with the built-in measuring device, such as the traditional ultrasonic wave and impedance detection method, the fine coal slime adheres to the key detection component (such as the float) after the foam in the flotation device tank body is broken, the mass of the float is changed, and then the measurement precision is affected, the detection is transferred to the relatively independent detection pipe, the environment of the float is more stable, the measurement error caused by the foam factor is greatly reduced, the stability and accuracy of the measurement data are ensured, and the reliable detection state can be maintained for a long time.

[0033] 2. Reduce the difficulty and workload of maintenance:

[0034] Since the detection device is not directly installed in the flotation device tank body, the ore pulp in the entire flotation device tank body does not need to be emptied during maintenance. Compared with the traditional detection device, the on-site workers do not need to perform the time-consuming ore pulp emptying operation, so that the manpower, material resources and downtime maintenance time are greatly saved, the overall maintenance efficiency of the production equipment is improved, and the influence of long-time interruption caused by maintenance on the production process is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0035] The above features, technical characteristics, advantages and implementation manners of the present application will be further described in a clear and understandable manner in combination with the preferred embodiments and the accompanying drawings.

[0036] Figure 1 It is a structure schematic view of a flotation machine liquid level detection device in the present application.

[0037] Figure 2 It is a structure schematic view of a flotation machine liquid level detection device in the present application. Figure 1 Partial enlarged view

[0038] Figure 3 It is a structure schematic view of a flotation machine liquid level detection device in the present application. Figure 2 Partial enlarged view

[0039] In the figure: 1, flotation main body, 101, flotation tank, 102, froth zone, 103, ore pulp zone, 104, communication port, 2, detection tube, 201, access hole, 3, valve one, 4, float, 5, height detection piece, 6, magnetic block, 7, liquid level indicator, 8, limit plate, 9, cleaning nozzle one, 10, cleaning nozzle two, 11, contrast detection piece, 12, cleaning nozzle three, 13, defoaming pipe, 1301, froth overflow port, 1302, inlet, 14, U-shaped pipe, 1401, blowdown port, 15, valve two, 16, fairing, 17, guide plate. DETAILED DESCRIPTION

[0040] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the specific implementation manners of the present application will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings in the following description only represent some embodiments of the present application, and for those skilled in the art, other drawings can be obtained from these drawings without creative labor, and other implementation manners can also be obtained.

[0041] In order to make the drawing simple, only the parts related to the present application are shown in each drawing, which does not represent the actual structure of the product. In addition, in order to make the drawing simple and easy to understand, in some drawings, only one of the parts with the same structure or function is shown, or only one of them is marked. In this paper, "one" not only means "only one", but also means "more than one", and "several" includes "two" and "more than two".

[0042] In this article, it is necessary to explain that unless there is a clear provision and limitation, the terms "installation", "connection", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral connection; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, or the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0043] In addition, in the description of the present application, the terms "first", "second" and the like are only used for distinguishing description, and cannot be understood as indicating or implying relative importance.

[0044] Reference Figures 1-3 For the first embodiment of the utility model, a flotation machine liquid level detection device is proposed, which comprises: a flotation body 1 having a flotation tank 101, the flotation tank 101 is sequentially divided into a froth zone 102 and a slurry zone 103 from top to bottom; the detection tube 2 is arranged relative to the flotation body 1, the valve 1 3 is respectively communicated with the detection tube 2 and the slurry zone 103 at both ends, the valve 1 3 is used for controlling the communication relationship between the detection tube 2 and the slurry zone 103; the float 4 is movably arranged in the detection tube 2; the height detection piece 5 is arranged on the detection tube 2 and is used for detecting the height position of the float 4.

[0045] In this embodiment, the detection process of the liquid level detection device is as follows:

[0046] After the equipment is started, when the slurry liquid level needs to be detected, the blow-off port 1401 is closed, and the valve 1 3 is opened, so that the detection tube 2 is communicated with the slurry zone 103, not the froth zone 102 above, to avoid the influence of the froth, at this time, the slurry in the slurry zone 103 will enter the detection tube 2 through the valve 1 3, because the overall density of the float 4 is less than that of the slurry, the float 4 will rise with the rising of the slurry liquid level, wherein the height detection piece 5 monitors the height position change of the float 4 in real time, because the height of the float 4 is directly related to the height of the slurry liquid level, the liquid level is basically flat, so by obtaining the height data of the float 4, the liquid level height of the slurry zone 103 in the flotation tank 101 can be indirectly and accurately known, and then the liquid level can be accurately controlled according to the production requirement, so as to indirectly and accurately control the thickness of the froth layer.

[0047] After the detection is completed, the equipment is stopped, the valve 1 3 is closed, and the blow-off port 1401 is opened, so as to empty the slurry in the detection tube 2, and the float 4 will slide to the initial position, ready for the next start.

[0048] The height detection member 5 can be selected from a capacitive liquid level sensor. When the float 4 moves up and down in the detection tube 2, the dielectric constant between the capacitor plates is changed (because the position of the float 4 changes, the liquid level in the tube changes, and the dielectric constants of the air above the liquid level and the ore pulp below the liquid level are different), thereby causing the capacitance value to change. The capacitance value change is converted into an electrical signal through a matching capacitance measurement circuit, and the electrical signal is input into a computer. After processing, the height position information of the float 4 can be obtained. This sensor has high precision, can adapt to the relatively stable detection environment of the detection tube 2, and is less affected by external interference. For example, a resistance liquid level sensor: the detection tube 2 is usually arranged in the vertical direction, and a resistance strip is arranged in the height direction. The float 4 contacts the resistance strip. As the float 4 moves up and down, the contact position of the float 4 with the resistance strip changes. By using the structure principle of the sliding resistor, the internal current voltage and other conditions are changed through the change of the resistance value. Through analysis of the current voltage and other signals, the height position of the float 4 can be obtained through calibration and conversion. Since the capacitive liquid level sensor has high precision and fast feedback, the capacitive liquid level sensor is usually used.

[0049] Specifically, the flotation main body 1 is usually a common flotation machine on the market, and the flotation tank 101 is the flotation tank body of the flotation machine. The shape of the flotation tank 101 is generally matched with the outer shape of the flotation main body 1. The detection tube 2 is usually cylindrical, and is made of corrosion-resistant, smooth inner wall stainless steel or engineering plastic, and preferably has a part of transparent window for observing the height change. The float 4 is matched with the cross-sectional shape, which facilitates the smooth rising or falling of the float 4 in the inside. The detection tube 2 can be fixed on one side of the flotation main body 1 by welding or bolt connection, and the communication position is close to the middle of the ore pulp area 103, so as to avoid direct contact with the turbulent region formed by the violent stirring of the bottom of the ore pulp area 103, so as to accurately and stably sense the liquid level change. At the same time, the connection part with the flotation main body 1 should be well sealed by flange mechanical seal to prevent ore pulp leakage. The valve 3 can be in the form of a stop valve or a ball valve. The stop valve has good sealing performance, and is upgraded to an electric control form, which is convenient for automatic control.

[0050] Further, the height detection member 5 is a Hall sensor, and the height detection member 5 is arranged on the outer wall of the detection tube 2 and located on one side of the float 4. The float 4 wraps the magnetic block 6, and the height detection member 5 is used to detect the height position of the float 4 through the magnetic force of the magnetic block 6.

[0051] In order to ensure quick detection and accurate results, and to control the cost, the density of the floating block 4 is less than the density of the ore pulp, and a detection mode of magnetic field and Hall sensor is used. Specifically, the floating block 4 is composed of a magnetic block 6 in the form of a polyurethane-wrapped permanent magnet, and the overall density is less than that of the ore pulp, so that the floating block 4 can float above the ore pulp. When the ore pulp moves up and down, the floating block 4 approaches the Hall sensor on one side. Since the Hall sensor is extremely sensitive to changes in the magnetic field, the Hall sensor is turned on, and the Hall sensor can transmit the corresponding electrical signal for computer analysis and calculation, or the corresponding liquid level indicator 7 is brightened to provide intuitive ore pulp liquid level information for the site.

[0052] The magnetic block 6 wrapped by the floating block 4 accurately converts the position change of the floating block 4 into a change in the strength of the magnetic field for the Hall sensor to recognize, enabling high-precision liquid level height position detection. The Hall sensor is arranged on the outer wall of the detection tube 2, and the magnetic block 6 is inside the floating block 4. The two can complete the detection process without physical contact, greatly reducing the wear between components. Also, there is no need for complex wiring or installation of large detection structures inside the detection tube 2. The liquid level detection device is easy to integrate, has little impact on the original structure of the flotation main body 1, can be quickly deployed and put into use, and reduces the equipment installation and debugging period.

[0053] It is worth mentioning that the electrical signal output by the Hall sensor is generally weak, and an external signal conditioning circuit is required to amplify, filter, linearize, and convert the original voltage or current signal detected by the Hall sensor into a standard, stable, and recognized electrical signal. After the controller responsible for real-time acquisition of the electrical signal, such as a PLC (Programmable Logic Controller) or a single-chip microcomputer, analyzes the corresponding liquid level information, it sends instructions to control the opening and closing degree of the valve 3 according to the pre-set liquid level control strategy, adjusts the amount of ore pulp flowing into the detection tube 2, and finally configures a power module to provide stable power for the Hall sensor, signal conditioning circuit, and controller.

[0054] Further, the floating block 4 is a polyurethane floating block, and the height detection member 5 is a plurality of height detection members 5 arranged vertically and spaced apart. The liquid level indicator 7 is arranged on the outer wall of the detection tube 2, and the liquid level indicator 7 is electrically connected to the height detection member 5, and the liquid level indicator 7 and the height detection member 5 correspond one-to-one.

[0055] In this embodiment, multiple height detection members 5 (Hall sensors) arranged vertically and spaced apart can achieve multi-point monitoring of different height positions of the floating block 4. Corresponding to each height detection member 5, a liquid level indicator 7 is arranged to intuitively present the range of the ore pulp liquid level, and the on-site operator does not need to closely monitor complex data displays or analysis curves, but can know the approximate range of the ore pulp liquid level by the lighting state of the indicator.

[0056] Further, the limiting plate 8 is arranged on the inner wall of the detection tube 2, and the plurality of height detection pieces 5 are located above the limiting plate 8, and the limiting plate 8 is used to support the float 4 after shutdown.

[0057] Further, the limiting plate 8 is annular, and the cleaning nozzle one 9 and the cleaning nozzle two 10 are arranged on the detection tube 2, the limiting plate 8 is located between the cleaning nozzle one 9 and the cleaning nozzle two 10, and the cleaning nozzle one 9 and the cleaning nozzle two 10 are both directed to the limiting plate 8, and the cleaning nozzle one 9 and the cleaning nozzle two 10 are respectively used to clean the bottom and the top of the float 4.

[0058] In this embodiment, after shutdown, the float 4 is lowered to the initial position at the bottom, at this time, the limiting plate 8 which is integrally formed or welded can stably support the float 4, avoiding collision damage, and at the same time, in order to avoid the problem of sensor misjudgment or the need for recalibration caused by the shutdown position of the float 4, the plurality of height detection pieces 5 are located above the limiting plate 8.

[0059] Further, in order to be prepared for the next start quickly, avoid the dirt such as residual ore slurry and impurity particles attached to the float 4 in the previous running process, the cleaning nozzle one 9 and the cleaning nozzle two 10 are arranged on the upper and lower sides of the limiting plate 8, when the equipment is shutdown, the electric control valve is closed, the blow-off port 1401 is opened, the ore slurry in the detection tube 2 is emptied, and the float 4 falls on the annular limiting plate 8, at this time, the cleaning nozzle one 9 and the cleaning nozzle two 10 are opened to flush the coal slime attached to the upper and lower surfaces of the magnetic float 4.

[0060] The nozzle is connected to an independent water supply pipeline, and the cleaning nozzle one 9 and the cleaning nozzle two 10 are respectively provided with a manual ball valve combined with an electromagnetic reversing valve and a water supply tank and a water pump on the water supply pipeline, the manual ball valve is used for manually cutting off the water flow during daily maintenance and debugging, the electromagnetic reversing valve is connected to the control system, and the water flow is quickly switched on and off and the flow direction is quickly switched according to the preset cleaning program or manual remote instruction, each nozzle is accurately controlled to work alone or cooperatively, and the automatic and timed cleaning process is realized, and the water pump provides the pressure required for water spraying.

[0061] Further, the contrast detection piece 11 is arranged on the top of the detection tube 2 and located directly above the float 4, the contrast detection piece 11 is an ultrasonic sensor, and the contrast detection piece 11 is higher than the top of the ore slurry area 103, and the contrast detection piece 11 is used to detect the height difference between the contrast detection piece 11 and the float 4.

[0062] Further, the cleaning nozzle three 12 is arranged on the top of the detection tube 2 and located on one side of the contrast detection piece 11, and the cleaning nozzle three 12 is used to clean the top of the float 4.

[0063] In this embodiment, the contrast detection member 11 (ultrasonic sensor) is installed as an auxiliary detection means, which is compared with the detection system based on the float 4 and the height detection member 5 (such as a Hall sensor) to correct errors and ensure detection accuracy. When a larger error is detected, the cleaning nozzle 12 can be used to clean the top of the float 4, because the error is caused by the fine foam on the top of the float 4.

[0064] Specifically, as shown in Figure 1 The controller can calculate the liquid level H-h of the ore pulp in the detection tube 2 by the pre-input installation height H, that is, the fixed height H of the contrast detection member 11 (ultrasonic sensor) relative to the bottom of the flotation tank 101, and the distance h detected by the contrast detection member 11. The controller compares the measurement values of the Hall sensor and the ultrasonic sensor to determine whether there is foam pollution above the float 4.

[0065] For example, when the liquid level H-h of the ore pulp in the detection tube 2 is compared with the height value detected by the Hall sensor, and the difference between them is greater than the allowable error value, it indicates that there is foam pollution above the float 4.

[0066] When there is foam pollution above the float 4, the cleaning nozzle 1 is opened to flush the top of the float 4 until the difference between them is less than the allowable error value.

[0067] In the measurement process, the sensor does not directly contact the ore pulp, but the position information is sensed by the magnet in the float 4, which effectively avoids the pollution of the ore pulp to the electrical elements and provides calibration for the ultrasonic sensor above, realizes self-diagnosis and automatic cleaning, and does not affect the stability of the foam layer in the tank during the cleaning process.

[0068] Further, the detection tube 2 is connected to one end of the valve 3 through the defoaming pipe 13, the top of the defoaming pipe 13 has a foam overflow port 1301, the top of the detection tube 2 has an inspection port 201, and the detection tube 2 and the defoaming pipe 13 are vertically arranged.

[0069] In this embodiment, the defoaming pipe 13 is arranged in front of the valve 3, and the two groups of pipes are vertically arranged, so that a small amount of air bubbles carried by the ore pulp float upward under the action of gravity and overflow through the foam overflow port 1301 at the top of the defoaming pipe 13, ensuring that only the ore pulp flows smoothly into the detection tube 2, so that the float 4 can truly reflect the change of the ore pulp liquid level.

[0070] At the same time, the inspection port 201 at the top of the detection tube 2 provides a convenient access for equipment maintenance. When the internal components of the detection tube 2 (such as the float 4 and the height detection member 5) fail or need to be checked and cleaned regularly, the worker does not need to disassemble the entire flotation machine and the related complex pipe system, but only needs to quickly access the inside of the detection tube 2 through the inspection port 201, which greatly shortens the maintenance time.

[0071] Further, the defoaming pipe 13 and the detection pipe 2 constitute a U-shaped pipe 14, the bottom of the U-shaped pipe 14 is provided with a blow-off port 1401, and the valve two 15 is arranged at the blow-off port 1401.

[0072] In the embodiment, the defoaming pipe 13 and the detection pipe 2 constitute a U-shaped pipe 14 structure, which prolongs the flow path of the ore pulp and the foam in the pipe, the flow rate is slowed down at the bottom of the U-shaped pipe 14, which provides more time for the natural rupture of the foam, further improves the defoaming effect, reduces the amount of foam entering the detection pipe 2, and at the same time, some solid impurity particles with a larger specific gravity carried by the ore pulp are more likely to precipitate and aggregate when the flow rate is reduced at the bottom of the U-shaped pipe 14, and finally are discharged under the condition that the valve two 15 is opened at the blow-off port 1401, thereby maintaining the stable operation of the detection device.

[0073] Further, the ore pulp area 103 is provided with a communication port 104, the defoaming pipe 13 is provided with an inlet 1302 near the valve one 3, the other end of the valve one 3 is communicated with the ore pulp area 103 through the communication port 104, and the rectifier cover 16 is arranged at the communication port 104 and located in the ore pulp area 103, which is used for blocking the foam, and the guide plate 17 is arranged at the inlet 1302 and located in the defoaming pipe 13, which is used for guiding the foam to the foam overflow port 1301.

[0074] In the embodiment, the detection pipe 2 is connected to the ore pulp area 103 in sequence through the defoaming pipe 13, the inlet 1302, the valve one 3 and the communication port 104, and through the built-in semicircular rectifier cover 16 at the communication port 104, the foam carried by the transverse flowing ore pulp can be further blocked from directly entering the detection pipe 2; and the arc-shaped guide plate 17 at the T-shaped inlet 1302 just helps the bubbles to move upward, forms a foam layer at the top and is discharged through the overflow port, so that part of the foam is prevented from randomly moving in the defoaming pipe 13 and smoothly overflowing, and the overflow port can also use the trapezoidal structure similar to the overflow port of the flotation tank 101, so that after the foam overflows from the top end of the defoaming pipe 13, the foam is guided to the overflow port at the specified position along the inclined surface path of the trapezoid, the overflow direction is controlled, and random pollution is avoided.

[0075] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, not to limit it. Although the present application has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present application can be modified or replaced equivalently without departing from the spirit and scope of the technical solutions of the present application, and they should be covered in the scope of the claims of the present application.

Claims

1. A flotation cell level detection device, characterized in that, Include: Float main body (1), the float main body (1) has floatation tank (101), the floatation tank (101) is divided into froth zone (102) and ore pulp zone (103) from top to bottom in turn; Detection tube (2) and valve one (3), the detection tube (2) is relatively stationary set up the float main body (1), the valve one (3) two ends are communicated the detection tube (2) and the ore pulp zone (103) respectively, the valve one (3) is used for controlling the communication relationship of the detection tube (2) and the ore pulp zone (103); Float block (4), the float block (4) is movably arranged in the detection tube (2); Height detection piece (5), the height detection piece (5) is arranged on the detection tube (2), for detecting the height position of the float block (4).

2. A level detection device for a flotation machine as claimed in claim 1, characterised in that, The height detection piece (5) is a hall sensor, and the height detection piece (5) is arranged on the outer wall of the detection tube (2) and located on one side of the float block (4), further comprising: Magnetic block (6), the float block (4) wraps the magnetic block (6), and the height detection piece (5) is used to detect the height position of the float block (4) by the magnetic force of the magnetic block (6).

3. A level detection device for a flotation machine as claimed in claim 2, characterised in that, The float block (4) is a polyurethane float block, and the height detection piece (5) is a plurality of, and the plurality of height detection pieces (5) are vertically spaced apart, further comprising: A plurality of liquid level indicator lights (7), a plurality of liquid level indicator lights (7) are arranged on the outer wall of the detection tube (2), the liquid level indicator light (7) is electrically connected with the height detection piece (5), and the liquid level indicator light (7) corresponds to the height detection piece (5) one by one.

4. A level detection device for a flotation machine as claimed in claim 3, characterised in that, Further comprising: Limiting plate (8), the limiting plate (8) is arranged on the inner wall of the detection tube (2), and the plurality of height detection pieces (5) are located above the limiting plate (8), and the limiting plate (8) is used to support the float block (4) after shutdown.

5. A level detection device for a flotation machine as claimed in claim 4, characterised in that, The limiting plate (8) is annular, further comprising: Cleaning nozzle one (9) and cleaning nozzle two (10), the cleaning nozzle one (9) and the cleaning nozzle two (10) are arranged on the detection tube (2), the limiting plate (8) is located between the cleaning nozzle one (9) and the cleaning nozzle two (10), and the cleaning nozzle one (9) and the cleaning nozzle two (10) are both towards the limiting plate (8), the cleaning nozzle one (9) and the cleaning nozzle two (10) are used for cleaning the bottom and top of the float block (4) respectively.

6. A level detection device for a flotation machine as claimed in claim 1, characterised in that, Further comprising: Contrast detection piece (11), the contrast detection piece (11) is arranged on the top of the detection tube (2) and located directly above the float block (4), the contrast detection piece (11) is an ultrasonic sensor, and the contrast detection piece (11) is higher than the top of the ore pulp zone (103), the contrast detection piece (11) is used for detecting the height difference between the contrast detection piece (11) and the float block (4).

7. A level detection device for a flotation machine as claimed in claim 6, characterised in that, Further comprising: A cleaning nozzle three (12) is arranged at the top of the detection pipe (2) and located at one side of the contrast detection member (11), which is used to clean the top of the float (4).

8. A level detection device for a flotation machine as claimed in claim 1, characterised in that, Further comprising: A defoaming pipe (13) is arranged at one end of the valve one (3) and communicates with the detection pipe (2), the top of the defoaming pipe (13) is provided with a foam overflow port (1301), the top of the detection pipe (2) is provided with an inspection port (201), and the detection pipe (2) and the defoaming pipe (13) are arranged in the vertical direction.

9. A level detection device for a flotation machine as claimed in claim 8, characterised in that, The defoaming pipe (13) and the detection pipe (2) form a U-shaped pipe (14), the bottom of the U-shaped pipe (14) is provided with a blowdown port (1401), and further comprising: A valve two (15) is arranged at the blowdown port (1401).

10. A level detection device for a flotation machine as claimed in claim 8, characterised in that, The pulp area (103) is provided with a communication port (104), the part of the defoaming pipe (13) close to the valve one (3) is provided with an inlet (1302), the other end of the valve one (3) communicates with the pulp area (103) through the communication port (104), and further comprising: A fairing (16) is arranged at the communication port (104) and located in the pulp area (103), which is used to block the foam; A guide plate (17) is arranged at the inlet (1302) and located in the defoaming pipe (13), which is used to guide the foam to the foam overflow port (1301).

Images