CN113607243A - Ore pulp liquid level detection device - Google Patents
Ore pulp liquid level detection device Download PDFInfo
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- CN113607243A CN113607243A CN202110805763.3A CN202110805763A CN113607243A CN 113607243 A CN113607243 A CN 113607243A CN 202110805763 A CN202110805763 A CN 202110805763A CN 113607243 A CN113607243 A CN 113607243A
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- tube
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/30—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats
- G01F23/64—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats of the free float type without mechanical transmission elements
- G01F23/72—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats of the free float type without mechanical transmission elements using magnetically actuated indicating means
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- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
Abstract
The invention discloses an ore pulp liquid level detection device, which comprises a detection tube, wherein a vertically arranged magnetostrictive liquid level sensor with a floating ball is clamped in the upper end section of the detection tube, a diaphragm is hermetically connected to the bottom of the detection tube, transformer oil is filled in the detection tube between the diaphragm and the floating ball, and a plurality of air holes are formed in the detection tube above the floating ball. According to the invention, the pressure balance at the diaphragm is utilized, so that the oil level change of the transformer oil reflects the ore pulp liquid level change, and the ore pulp liquid level is detected by measuring the oil level, thereby avoiding the floating ball from being corroded and attached by the ore pulp, and having higher measurement precision; the density of the transformer oil is small, so that the change of the liquid level of the ore pulp is amplified, and the measurement precision of the magnetostrictive liquid level sensor is higher.
Description
Technical Field
The invention relates to the technical field of ore pulp liquid level measurement, in particular to an ore pulp liquid level detection device.
Background
In the non-ferrous metal industry, 90% of the minerals are processed by flotation processes, which are of no help to the overall mining production. The liquid level of the ore pulp is one of the main factors influencing the flotation effect, so the detection and the control of the ore pulp are very critical.
At present, some domestic ore pulp liquid level detection devices (for example, the ore pulp liquid level detection device shown in CN 212030685U is authorized to announce the novel ore pulp liquid level detection device shown in 205691205U is authorized to announce the number), all put into the float toward the ore pulp basically, thereby measure the change of ore pulp liquid level with the displacement of all kinds of sensors detection float, but various problems that can not fine solution detection in-process met like this: first, the erosion and adhesion of the slurry can affect the activity and measurement accuracy of the device. Secondly, in order to deal with the problem that the device is stuck due to the attachment of ore pulp, a flushing device needs to be additionally arranged, so that inconvenience is caused. And thirdly, during flotation and mineral separation, the stirring of ore pulp and the floating of air bubbles can cause fluctuation, so that the fluctuation of a measured value is large.
Disclosure of Invention
The invention aims to provide the ore pulp liquid level detection device with higher measurement precision aiming at the defects in the prior art.
The invention provides an ore pulp liquid level detection device which comprises a detection tube, wherein a vertically arranged magnetostrictive liquid level sensor with a floating ball is clamped in the upper end section of the detection tube, a diaphragm is hermetically connected to the bottom of the detection tube, transformer oil is filled in the detection tube between the diaphragm and the floating ball, and a plurality of air holes are formed in the detection tube above the floating ball.
In order to conveniently observe the change of the floating ball during measurement, the detection tube comprises a transparent tube, a connecting tube and an oil storage tube which are communicated with each other from top to bottom, the magnetostrictive liquid level sensor is vertically clamped in the transparent tube, the diaphragm is hermetically connected to the bottom of the oil storage tube, and the air hole is formed in the upper portion of the transparent tube.
In order to enable the oil level of the transformer to rise more obviously, the cross sectional area of the oil storage pipe is the same as the pressed area of the diaphragm, and the cross sectional areas of the oil storage pipe, the transparent pipe and the connecting pipe are reduced in sequence.
In order to conveniently install the detection tube on the flotation tank, the detection tube is connected with an installation bracket used for being connected with the flotation tank.
The diaphragm is made of fluororubber.
The magnetostrictive liquid level sensor is connected with the signal processing mechanism through a lead.
The detection environment of the ore pulp liquid level is severe, the ore pulp stirring and the air bubble floating are generated to fluctuate, the measurement is difficult to reduce, the measurement is more accurate, and the bottom of the diaphragm is also connected with a current stabilizer.
The flow stabilizer comprises a hollow cylindrical baffle and a plurality of circular truncated cone annular plates which are arranged on the inner side of the hollow cylindrical baffle and gradually decrease from big to small.
Compared with the prior art, the invention has the following advantages:
the oil level of the transformer oil is changed to reflect the change of the liquid level of the ore pulp by utilizing the pressure balance at the diaphragm, and the liquid level of the ore pulp is detected by measuring the oil level, so that the floating ball is prevented from being corroded and attached by the ore pulp, and the measurement precision is higher.
And secondly, the change of the liquid level of the ore pulp is amplified by utilizing the small density of the transformer oil, so that the measurement precision of the magnetostrictive liquid level sensor is higher.
And thirdly, the magnetostrictive liquid level sensor is used, so that a continuous, reliable, accurate and sensitive liquid level signal can be provided under a severe working environment.
Drawings
Fig. 1 is a schematic structural diagram of a pulp level detection device in the invention.
Fig. 2 is a schematic axial side structure diagram of the current stabilizer of the present invention.
FIG. 3 is a graph plotting data from Table 1 according to the present invention.
The labels shown in the figures and the corresponding component names are:
1. a detection tube; 11. air holes; 12. a transparent tube; 13. a connecting pipe; 14. an oil storage tube;
2. a magnetostrictive liquid level sensor; 21. a floating ball;
3. a diaphragm sheet;
4. transformer oil;
5. mounting a bracket;
6. a current stabilizer; 61. a hollow cylindrical baffle; 62. a circular truncated cone annular plate;
a. a flotation cell.
Detailed Description
As can be seen from figure 1, the pulp liquid level detection device comprises a detection tube 1, a magnetostrictive liquid level sensor 2, a diaphragm 3 and transformer oil 4,
the detecting tube 1 comprises a transparent tube 12, a connecting tube 13 and an oil storage tube 14 which are communicated up and down, two air holes 11 are arranged on the upper part of the transparent tube 12, an air tube is connected on the air holes 11, the cross section area of the oil storage tube 14 is larger than that of the transparent tube 12, the cross section area of the transparent tube 12 is larger than that of the connecting tube 13,
the magnetostrictive liquid level sensor 2 is vertically clamped in the transparent tube 12, a floating ball 21 of the magnetostrictive liquid level sensor 2 moves up and down in the transparent tube 12 below the air hole 11,
the diaphragm 3 is made of fluororubber and is hermetically connected to the bottom of the oil storage pipe 14, and the pressure bearing area of the diaphragm 3 is the same as the cross sectional area of the oil storage pipe 14;
the transformer oil 4 is filled in the transparent tube 12, the connecting tube 13 and the oil storage tube 14 between the diaphragm 3 and the floating ball 21,
when the liquid level sensor is used, along with the change of the liquid level of the ore pulp, the pressure formed by the liquid ore pulp at the position of the diaphragm 3 is correspondingly changed, so that the diaphragm 3 is deformed, the oil level of the transformer oil 4 is changed, the floating ball 21 can generate displacement, and the magnetostrictive liquid level sensor 2 can measure a displacement signal.
In the invention, the magnetostrictive liquid level sensor 2 is connected with a signal processing mechanism by a lead wire, the initial position of a floating ball 21 of the magnetostrictive liquid level sensor 2 is fixed at the middle part of a transparent tube 12, and the height of the transparent tube 12 is 350 mm.
As can be seen from fig. 1, the present invention further comprises a mounting bracket 5 for fixing the detecting tube 1 in the flotation cell a, the mounting bracket 5 is made of PVC pipe and joint, the PVC pipe is symmetrically connected to the detecting tube 1 through the cross joint to form an outer frame surrounding the detecting tube 1. The PVC pipe has the main components of polyvinyl chloride, has low manufacturing cost, better tensile, bending, compression and impact resistance, excellent corrosion resistance and chemical resistance, is not influenced by moisture, has light weight, and ensures that the device is simple and convenient to install. When the device needs to be cleaned, the device is easy to disassemble and clean.
As can be seen from fig. 1 and 2, the present invention further includes a flow stabilizer 6 installed at the bottom of the diaphragm 3, the flow stabilizer 6 includes a hollow cylindrical baffle 61 and a plurality of circular truncated cone annular plates 62 which are arranged inside the hollow cylindrical baffle 61 and decrease gradually from large to small, the hollow cylindrical baffle 61 can filter the fluctuation generated by the slurry stirring, the circular truncated cone annular plates 62 can reduce the negative impact on the measurement caused by the slurry stirring impact, and the more the circular truncated cone annular plates 62 are, the denser the better the filtering effect is.
The invention selects a magnetostrictive liquid level sensor. The detection mechanism is based on the wideman effect between the magnetostrictive waveguide wire and the vernier magnetic ring of the sensor core detection element. The sensor has strong environmental adaptability, pressure resistance, dust resistance and pollution resistance; the sensor adopts a non-contact measurement mode, and the sensor is basically not abraded, so that the measurement precision can be ensured; the output signal of the sensor is an absolute displacement value, and data cannot be lost even if the power supply is suddenly interrupted; the measuring range is large, and the repetition precision is high. The characteristics enable the magnetostrictive liquid level sensor to provide continuous, reliable, accurate and sensitive liquid level signals under severe working environments.
The invention is put into the next meter of ore pulp for measurement, and in order to keep the balance of the initial position, the length h2 of the connecting pipe 13 needs to be calculated and designed, so that the pressure of the transformer oil 4 in the pipe to the diaphragm 3 is equal to the pressure of the deep ore pulp of one meter to the diaphragm 3, thus the diaphragm 3 cannot generate deformation at the initial position, the diaphragm 3 is most sensitive to pressure change under the initial natural state, and the initial zero position is the most accurate position for measurement. The vertical distance h1 between the bottom of the connecting pipe 13 and the diaphragm 3 is 100mm, the vertical distance h3 between the top of the connecting pipe 13 and the bottom of the floating ball 21 is 175mm, and the density ρ of the transformer oil is set to beOilIs 895kg/m3Density of the pulp ρPulp and its production processIs 1300 kg/m3The pressure balance equation at diaphragm 3 is listed:
ρoilghOil＝ρPulp and its production processghPulp and its production process (1)
When depth h of the pulpPulp and its production processWhen the depth is 1m, the depth h of the transformer oil 4 in the detection tube 1 can be calculated by the formula 1Oil＝ 1.453m；
As can be seen from fig. 1, h2 ═ hOilH3-h1, resulting in a tube length h2 of intermediate connecting tube 13 of 1.178 m.
In the process of using the invention, when the liquid level of the ore pulp rises, the ore pulp pressure at the position of the diaphragm 3 is increased, and the diaphragm 3 is jacked up, so that the oil level of the transformer oil 4 rises; similarly, when the pulp liquid level drops, the pulp pressure at the position of the diaphragm 3 is reduced, the diaphragm 3 is pressed down, the oil level of the transformer oil 4 drops, and the magnetostrictive liquid level sensor 2 can detect the change of the pulp liquid level.
In the present invention, the pressure receiving area s of the diaphragm 3 is selectedFilmThe larger the oil chamber, the larger the oil level change caused by the deformation of the diaphragm, and the more sensitive the measurement. A variable is introduced into this measurement, namely the coefficient of elasticity k of the diaphragm 3Film. During measurement, the equilibrium equation is:
ρoilghOilsFilm+kFilmΔhFilm＝ρPulp and its production processghPulp and its production processsFilm
In the formula, ρOilIs the density of the transformer oil, hOilTo detect the depth, Δ h, of the transformer oil 4 in the tube 1FilmVarying the height, p, of the diaphragm 3Pulp and its production processAs density of the measured pulp, hPulp and its production processTo detect the depth of insertion of the tube 1 into the flotation cell.
Next, we make a tank simulated flotation tank into which is added muddy water having the same density as the pulp. The detection pipe 1 is firstly placed in the muddy water with the depth of 1 meter, the measured oil level is 12.1cm, six air outlets with equal spacing are arranged on an air compressor, the six air outlets are placed in the muddy water to simulate the liquid level fluctuation of the muddy water and the floating of bubbles, and the muddy water is stirred. With the overflow mouth that sets up in advance, the accurate ore pulp liquid level that adjusts changes, as shown in table 1 below, obtain a set of data:
TABLE 1
| Pulp liquid level increment (cm) | -6 | -4.5 | -3 | -1.5 | 0 | 1.5 | 3 | 4.5 | 6 |
| Oil level (cm) | 3.5 | 3.9 | 5.2 | 8.0 | 12.1 | 15.9 | 18.3 | 19.3 | 19.6 |
The data in the table are collated, and a graph as shown in FIG. 3 is plotted,
observing the graph shown in fig. 3, it is found that the amount of deformation of the fluororubber diaphragm increases and the modulus of elasticity thereof also increases. Then increase the same deformation volume, the power that diaphragm deformation produced will be bigger and bigger, and the ore pulp liquid level rises the same height of decline every time, and along with the height variation more, the deformation volume of fluororubber will be littleer and more each time. So that the oil level in the observation area rises and falls at a smaller and smaller rate.
The relationship between the measured oil level and the change of the pulp liquid level is similar to a linear function in a certain measuring range, and the relationship is available. The data shown by measurement is stable, and shows that the filter part researched and designed by the method can well filter the fluctuation caused by ore pulp stirring and bubble floating, so that the stability and the precision of ore pulp liquid level detection are ensured. Meanwhile, the device is simple and convenient to install and maintain, and creates good conditions for subsequently controlling the liquid level of ore pulp and improving the ore dressing benefit.
Claims (8)
1. The utility model provides an ore pulp liquid level detection device, includes test tube (1), its characterized in that: the vertical magnetostrictive liquid level sensor (2) with a floating ball (21) is clamped in the upper end section of the detection tube, a diaphragm (3) is hermetically connected to the bottom of the detection tube, transformer oil (4) is filled in the detection tube between the diaphragm and the floating ball, and a plurality of air holes (11) are formed in the detection tube above the floating ball.
2. The pulp level detection device of claim 1, wherein: the detection tube comprises a transparent tube (12), a connecting tube (13) and an oil storage tube (14) which are communicated and arranged up and down, the magnetostrictive liquid level sensor is vertically clamped in the transparent tube, the diaphragm is hermetically connected to the bottom of the oil storage tube, and the air hole is formed in the upper portion of the transparent tube.
3. The pulp level detection device of claim 2, wherein: the cross-sectional area of the oil storage pipe is the same as the pressed area of the diaphragm, and the cross-sectional areas of the oil storage pipe, the transparent pipe and the connecting pipe are reduced in sequence.
4. The pulp level detection device of claim 1, wherein: the detection tube is connected with a mounting bracket (5) used for being connected with the flotation tank.
5. The pulp level detection device of claim 1, wherein: the diaphragm is made of fluororubber.
6. The pulp level detection device of claim 1, wherein: the magnetostrictive liquid level sensor is connected with the signal processing mechanism through a lead.
7. The pulp level detection device of claim 1, wherein: the bottom of the diaphragm is also connected with a current stabilizer (6).
8. The pulp level detection device of claim 7, wherein: the flow stabilizer comprises a hollow cylindrical baffle (61) and a plurality of circular truncated cone annular plates (62) which are arranged on the inner side of the hollow cylindrical baffle and sequentially decrease from large to small.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110805763.3A CN113607243A (en) | 2021-07-16 | 2021-07-16 | Ore pulp liquid level detection device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110805763.3A CN113607243A (en) | 2021-07-16 | 2021-07-16 | Ore pulp liquid level detection device |
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| Publication Number | Publication Date |
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| CN113607243A true CN113607243A (en) | 2021-11-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110805763.3A Pending CN113607243A (en) | 2021-07-16 | 2021-07-16 | Ore pulp liquid level detection device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117928684A (en) * | 2024-03-22 | 2024-04-26 | 北京晨淼科技有限公司 | Portable electric solution level tester and testing method thereof |
| CN117928684B (en) * | 2024-03-22 | 2024-06-07 | 北京晨淼科技有限公司 | Portable electric solution level tester and testing method thereof |
-
2021
- 2021-07-16 CN CN202110805763.3A patent/CN113607243A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117928684A (en) * | 2024-03-22 | 2024-04-26 | 北京晨淼科技有限公司 | Portable electric solution level tester and testing method thereof |
| CN117928684B (en) * | 2024-03-22 | 2024-06-07 | 北京晨淼科技有限公司 | Portable electric solution level tester and testing method thereof |
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