CN211954321U - Liquid interface and material deposition thickness detection device - Google Patents
Liquid interface and material deposition thickness detection device Download PDFInfo
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- CN211954321U CN211954321U CN202020784401.1U CN202020784401U CN211954321U CN 211954321 U CN211954321 U CN 211954321U CN 202020784401 U CN202020784401 U CN 202020784401U CN 211954321 U CN211954321 U CN 211954321U
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Abstract
The utility model provides a liquid interface and material deposit thickness detection device belongs to liquid level detection equipment field, include: liquid interface and material deposit thickness detection device includes: the pressure measuring piece is used for measuring the pressure difference between the upper depth and the lower depth; the lifting mechanism is used for driving the pressure measuring piece to move up and down; and the encoder is connected with the lifting mechanism and used for detecting the liquid level depth of the position of the pressure measuring piece. The utility model discloses utilize the pressure differential of two upper and lower degree of depth departments of pressure measurement spare measurement, obtain the liquid density of measuring position through the pressure differential, and then judge the interface according to the liquid density value of measuring position, can in time accurately monitor liquid interface density distribution and change and measure the coal slime and deposit thickness, solved the defect that prior art ultrasonic measurement effect is poor and coal slime analysis and detection method is difficult for operating.
Description
Technical Field
The utility model belongs to liquid level detection equipment field, concretely relates to liquid interface and material deposit thickness detection device.
Background
The coal slurry water treatment of the concentration tank of the coal preparation plant is a process for purifying and precipitating the coal slurry water by adding flocculant hormone, the detection of the thickness of the coal slurry layer at the bottom of the concentration tank is crucial in the coal preparation production process, the coal slurry layer is too high or too thick, not only can cause a rake pressing accident, but also can react the problem of the consumption of the flocculant from the side, namely the real-time monitoring of the thickness of the coal slurry layer has guiding significance for adjusting the water treatment process.
At present, two methods are mainly used for detecting the concentrated pool coal slime: firstly, an ultrasonic interface detector is adopted, but the measurement effect is poor due to muddy slime water in production; the other method is a device for sampling, analyzing and detecting the coal slime, and the device has the defects of complicated mechanism and difficult operation.
SUMMERY OF THE UTILITY MODEL
Based on the above background problem, the utility model aims at providing a liquid interface and material deposit thickness detection device utilizes the pressure measurement spare to carry out the differential pressure calculation of two upper and lower depths, and then judges the interface according to the liquid density value of measuring position, can in time accurately monitor liquid interface density distribution and change and measure the coal slime and deposit thickness, has solved the defect that prior art ultrasonic measurement effect is poor and the difficult operation of coal slime analysis and detection method.
In order to achieve the above object, the embodiment of the present invention provides a technical solution:
liquid interface and material deposit thickness detection device includes: the pressure measuring piece is used for measuring the pressure difference between the upper depth and the lower depth; the lifting mechanism is used for driving the pressure measuring piece to move up and down; and the encoder is connected with the lifting mechanism and used for detecting the liquid level depth of the position of the pressure measuring piece.
In one embodiment, the pressure measuring member includes an upper pressure sensor and a lower pressure sensor, which are distributed up and down.
Preferably, the upper pressure sensors and the lower pressure sensors are distributed in a vertically staggered manner, and the height difference h between the upper pressure sensors and the lower pressure sensors is more than or equal to 20 cm.
In one embodiment, the pressure measurement member is a differential pressure sensor.
In one embodiment, the lifting mechanism comprises: a drive unit; the screw rod is vertically connected to the output end of the driving unit and synchronously rotates with the encoder; the branch pipe is vertically arranged and used for fixing the pressure measuring part, and the branch pipe is connected with the screw rod through a first connecting piece so as to drive the pressure measuring part to move up and down.
In one embodiment, the lifting mechanism comprises: a drive unit; the branch pipe is vertically arranged and used for fixing the pressure measuring part, and the top end of the branch pipe is fixed; the winding roll is connected to the output end of the driving unit and synchronously rotates with the encoder, a cable is wound on the winding roll and is respectively connected with the pressure measuring piece to drive the pressure measuring piece to move along the branch pipe up and down.
Preferably, the lifting mechanism further comprises: and the conductive slip ring is coaxially arranged with the winding roll.
Preferably, a limit switch is arranged in the moving direction of the pressure measuring piece to limit the moving distance of the pressure measuring piece.
In one embodiment, the pressure measuring member is fixed to a bracket, and the bracket is connected to the branch pipe by a second connecting member.
In one embodiment, the liquid interface and material deposition thickness detecting apparatus further comprises: the control system is in communication connection with the pressure measuring part, the lifting mechanism and the encoder respectively, and is used for receiving signals of the pressure measuring part and the encoder and controlling the lifting mechanism to act; and the operation panel is in communication connection with the control system and is used for setting and displaying parameters.
Compared with the prior art, the embodiment of the utility model provides a have following effect at least:
1. the utility model discloses utilize the pressure differential of two upper and lower degree of depth departments of pressure measurement spare measurement, obtain the liquid density of measuring position through the pressure differential, and then judge the interface according to the liquid density value of measuring position, can in time accurately monitor liquid interface density distribution and change and measure the coal slime and deposit thickness, solved the defect that prior art ultrasonic measurement effect is poor and coal slime analysis and detection method is difficult for operating.
2. The pressure measuring piece of the utility model can select the upper pressure sensor and the lower pressure sensor which are distributed up and down, and the upper pressure sensor and the lower pressure sensor are arranged in a staggered way, so that the fluctuation of the measured value is small; the height difference h between the upper pressure sensor and the lower pressure sensor is more than or equal to 20cm, so that the measurement error can be reduced.
3. The utility model discloses be equipped with limit switch in the direction of movement of pressure measurement spare, carry on spacingly to the displacement of pressure measurement spare.
4. The utility model discloses not only can realize the detection of liquid interface and coal slime sediment thickness, can realize the removal tracking formula of liquid density moreover and measure.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below.
Fig. 1 is a liquid interface and material deposition thickness detection device in embodiment 1 of the present invention;
fig. 2 is the utility model discloses liquid interface and material deposit thickness detection device among embodiment 2.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "top", "bottom", "left", "right", "vertical", "horizontal", "inner", "outer", "front", "rear", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings of the specification, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. It should be further noted that the description of the terms "first," "second," etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit to the number of technical features indicated.
Example 1
A device for detecting the thickness of a liquid interface and a material deposit, as shown in fig. 1, comprises: go up pressure sensor 1, down pressure sensor 2, encoder 3, hoist mechanism, operating panel and control system, the pressure measurement spare of this embodiment forms through last pressure sensor 1 and the pressure sensor 2 that push down that distribute about passing through promptly, it all is connected with control system communication to go up pressure sensor 1, push down pressure sensor 2, encoder 3, hoist mechanism and operating panel.
The lifting mechanism is used for driving the upper pressure sensor 1 and the lower pressure sensor 2 to synchronously move up and down, and the lifting mechanism of the embodiment comprises; a screw 4, a branch pipe 5 and a drive unit.
In this embodiment, the driving unit is in communication connection with the control system, the driving unit includes a motor 401 and a transmission case 402, as shown in fig. 1, the transmission case 402 is horizontally connected to an output end of the motor 401, the lead screw 4 is vertically disposed and connected to the transmission case 402, and the encoder 3 is also connected to the transmission case 402 to realize synchronous rotation with the lead screw 4.
The branch pipe 5 is also vertically arranged and is connected to the spindle 4 by a first connecting piece 403. Specifically, the first connecting member 403 is an i-shaped structure, and includes a nut sleeved on the lead screw 4, a sleeve sleeved on the branch pipe 5, and a connecting rod connecting the nut and the sleeve, and when the driving unit drives the lead screw 4 to rotate, the nut moves along the lead screw 4, thereby driving the branch pipe 5 to move.
It should be noted that the first connecting member 403 is not limited to this, and in another embodiment, the left end of the connecting rod may be directly fixed to the branch pipe 5; it should be noted that the driving unit is not limited to the structure of the present embodiment, and in other embodiments, a transmission mechanism may be provided for transmission.
In order to limit the moving distance of the first connecting piece 403, in this embodiment, an upper limit switch 404 is disposed at the top of the screw rod 4, a lower limit switch 405 is disposed at the bottom end of the screw rod 4, the upper limit switch 404 and the lower limit switch 405 are both in communication connection with the control system, and when the first connecting piece 403 moves to be in contact with the upper limit switch 404 or the lower limit switch 405, the control system receives a signal transmitted by the upper limit switch 404 or the lower limit switch 405, and controls the driving unit to stop working.
In this embodiment, the upper pressure sensor 1 and the lower pressure sensor 2 are disposed at the lower portion of the branch pipe 5 and fixed by a bracket, and the bracket is fixed to the branch pipe 5 by a second connecting member 501, and the second connecting member 501 in this embodiment is a T-shaped structure, but is not limited thereto.
Specifically, as shown in fig. 1, the bracket is formed by a first sleeve 502 and a second sleeve 503 which are arranged in parallel left and right, the side walls of the first sleeve 502 and the second sleeve 503 are fixed, and the right side of the second sleeve 503 is fixed with a second connecting piece 501; first sleeve 502 is used for the holding to go up pressure sensor 1, and second sleeve 503 is used for the holding to push down pressure sensor 2, and last pressure sensor 1 and push down pressure sensor 2 of this embodiment stagger the setting from top to bottom promptly, and the setting of staggering from top to bottom can reduce the fluctuation of measured value, and when branch pipe 5 removed, further drives pressure sensor 1 and push down pressure sensor 2 and reciprocate.
It should be noted that the structure of the bracket is not limited to the two sleeve structures of the present embodiment, and in other embodiments, one sleeve may be arranged to accommodate the pressure sensor, and the other pressure sensor is directly fixed to the sleeve.
In the embodiment, the height difference h between the upper pressure sensor 1 and the lower pressure sensor 2 is set to be more than or equal to 20cm, so that the measurement error can be reduced.
In this embodiment, the control system is a PLC, the operation panel is provided with a calibration button, a thickness measurement button, an interface measurement button, a setting button, and a display screen, and the control system is internally preset with control programs corresponding to the calibration button, the thickness measurement button, and the interface measurement button, respectively.
In this embodiment, the motor 401 may specifically be a stepper motor, the pressure sensor is 7MF1572, the encoder is E6CP multi-turn absolute value power-off memory encoder, and the limit switch is E2E-X8MD1 two-wire proximity switch.
The detection device of the embodiment is used for detecting the interface of the concentration tank and the thickness of the coal slime layer, and the working principle is as follows:
1. calibration and operation
When a calibration key on the control panel is pressed, the PLC control motor 401 drives the screw rod 4 to rotate, so that the first connecting piece 403 moves upwards to the upper limit switch 404, the position of the device is reset and approved, and the device starts to work after staying for 5 seconds.
Before work, the set density is input on an operation panel through a set key, and after calibration is finished, the PLC control motor 401 drives the first connecting piece 403 to start descending position exploration according to the set density until the position reaches the set density; and the PLC controls the material accumulation condition to track and move up and down, monitors the material deposition accumulation condition in real time, stops descending if the material deposition accumulation condition does not reach the set density when the material deposition accumulation condition descends to the lower limit switch 405 (or the set maximum descending depth), and judges that no coal slime or material accumulation exists in the pool.
2. Coal slime thickness measurement
Setting an upper limit value and a lower limit value of the liquid density of a coal slime layer on an operation panel, pressing a start button, driving a screw rod 4 to rotate by a PLC (programmable logic controller) control motor 401, further driving an upper pressure sensor 1 and a lower pressure sensor 2 to synchronously move downwards, transmitting detected pressure value signals to a control system by the upper pressure sensor 1 and the lower pressure sensor 2 in the process of moving downwards, calculating the liquid density of the positions of the upper pressure sensor 1 and the lower pressure sensor 2 by the control system according to the pressure difference between the positions, and outputting the liquid density value to a display screen for displaying; and comparing the liquid density value with the preset upper limit value and lower limit value of the liquid density of the coal slime layer.
When the calculated liquid density value of the position is smaller than the set density lower limit, the PLC controls the upper pressure sensor 1 and the lower pressure sensor 2 to continuously descend; when the calculated liquid density value of the position is equal to the set upper density limit, the PLC controls the upper pressure sensor 1 and the lower pressure sensor 2 to stop moving, the liquid level depth at the moment is measured through the encoder 3, and the thickness of the coal slime layer is obtained by subtracting the liquid level depth from the total liquid level depth of the concentration tank.
The pressure value detected by the upper pressure sensor 1 is set to be P1The pressure value detected by the lower pressure sensor is P2The height difference between the upper pressure sensor 1 and the lower pressure sensor 2 is h, and the density of the liquid at the position is rhoΔThen, the first step is executed,
ρΔ＝(P2-P1)/gh
as shown in figure 1, the total depth of the liquid level of the concentration tank is set to be H, and the depth of the liquid level at the position is set to be H1The thickness of the coal slime layer is HΔThen, the first step is executed,
HΔ＝H-H1
it should be noted that, this embodiment needs to set up upper limit value and lower limit value of coal slime layer liquid density in advance when using, this because the measured value has certain undulant, can not be a fixed value, the utility model discloses a detection device probably installs on the harrow frame, is mobile, can lead to undulant increase, consequently sets up upper limit value and lower limit value and can improve detection accuracy. Under other use conditions with small fluctuation, the liquid density value of only one coal slime layer can be preset.
3. Interface measurement
Pressing an interface measuring button, controlling the upper pressure sensor 1 and the lower pressure sensor 2 to rise from the coal slime layer by the PLC until the upper limit of the liquid level rises to the upper limit of the liquid level, wherein the upper limit of the liquid level is about 1m below the liquid level of a water layer generally, calculating liquid density values of different depths by the PLC according to the upper pressure sensor 1 and the lower pressure sensor 2, calculating records by sections by the PLC according to needs, and displaying on a display screen. Interface measurements may be measured manually or periodically as desired.
Example 2
A device for detecting the thickness of liquid interface and material deposit, as shown in fig. 2, comprising: go up pressure sensor 1, down pressure sensor 2, encoder 3, hoist mechanism, operating panel and control system, it all is connected with control system communication to go up pressure sensor 1, down pressure sensor 2, encoder 3, hoist mechanism and operating panel.
Unlike embodiment 1, the lifting mechanism of the present embodiment includes: a drive unit; a branch pipe 5 and a take-up reel 6.
As shown in fig. 2, the driving unit includes a motor 401 and a gear box 402, wherein the gear box 402 is vertically connected to the output end of the motor 401; the encoder 3, the winding roll 6 and the gearbox 402 are horizontally arranged, and the encoder 3 and the winding roll 6 are coaxially connected with the gearbox 402, namely the encoder 3 and the winding roll 6 synchronously rotate; and a cable 601 is wound on the winding roll 6, and the cable 601 is respectively connected with the upper pressure sensor 1 and the lower pressure sensor 2.
The branch pipe 5 is vertically arranged, the top end of the branch pipe is fixed, and the branch pipe can be fixed with a fixing frame arranged above the liquid level. The upper pressure sensor 1 and the lower pressure sensor 2 are disposed at the lower portion of the branch pipe 5 and fixed by a sensor bracket, and the sensor bracket is fixed with the branch pipe 5 by a second connecting member 501, in this embodiment, the second connecting member 501 is a T-shaped structure, but is not limited thereto.
Specifically, the sensor bracket is formed by a first sleeve 502 and a second sleeve 503 which are arranged in parallel left and right, the side walls of the first sleeve 502 and the second sleeve 503 are fixed, and the right side of the second sleeve 503 is fixed with a second connecting piece 501; first sleeve 502 is used for holding pressure sensor 1, and second sleeve 503 is used for holding pressure sensor 2 down, and the setting of staggering about last pressure sensor 1 and the pressure sensor 2 of this embodiment promptly, when take-up reel 6 rotated, drives through cable 601 and goes up pressure sensor 1 and pressure sensor 2 and remove along branch pipe 5.
In order to limit the moving distance of the second connecting piece 501, an upper limit switch is arranged at the top of the branch pipe 5, a lower limit switch is arranged at the bottom end of the branch pipe 5, the upper limit switch and the lower limit switch are both in communication connection with a control system, and when the second connecting piece 501 moves to be in contact with the upper limit switch or the lower limit switch, the control system receives a signal transmitted by the upper limit switch or the lower limit switch and controls the driving unit to stop working.
In this embodiment, in order to realize the connection with the control system, the lifting mechanism further comprises a conductive slip ring 7, the conductive slip ring 7 is coaxially arranged with the winding roll 6, and the conductive slip ring 7 is connected with the control system.
Example 3
The utility model provides a liquid interface and material deposit thickness detection device, includes differential pressure sensor, encoder 3, hoist mechanism, operating panel and control system, and differential pressure sensor is chooseed for use to the pressure measurement spare of this embodiment promptly, and differential pressure sensor is current product, and its concrete structure and theory of operation this embodiment are no longer repeated.
It should be noted that the detection device of the present invention is suitable for the interface detection of the concentration tank of the concentrating plant and the detection of the thickness of the coal slurry, but is not limited to this, and can also be used for the detection of other liquid level interfaces and the thickness of sludge; additionally, the utility model discloses not only can be used for the detection of liquid interface and material deposit thickness, can also be used to the real time monitoring of liquid density.
It should be noted that, for those skilled in the art, without departing from the inventive concept, several variations and modifications can be made, which are within the scope of the present invention.
Claims (10)
1. Liquid interface and material deposit thickness detection device, its characterized in that includes:
the pressure measuring piece is used for measuring the pressure difference between the upper depth and the lower depth;
the lifting mechanism is used for driving the pressure measuring piece to move up and down;
and the encoder is connected with the lifting mechanism and used for detecting the liquid level depth of the position of the pressure measuring piece.
2. The apparatus as claimed in claim 1, wherein the pressure measuring member comprises an upper pressure sensor and a lower pressure sensor, and the upper pressure sensor and the lower pressure sensor are disposed above and below each other.
3. The device for detecting the thickness of the deposited material on the liquid interface as claimed in claim 2, wherein the upper pressure sensor and the lower pressure sensor are distributed in a vertically staggered manner, and the height difference h between the upper pressure sensor and the lower pressure sensor is greater than or equal to 20 cm.
4. The apparatus of claim 1, wherein the pressure measuring device is a differential pressure sensor.
5. The apparatus of claim 1, wherein the lifting mechanism comprises:
a drive unit;
the screw rod is vertically connected to the output end of the driving unit and synchronously rotates with the encoder;
the branch pipe is vertically arranged and used for fixing the pressure measuring part, and the branch pipe is connected with the screw rod through a first connecting piece so as to drive the pressure measuring part to move up and down.
6. The apparatus of claim 1, wherein the lifting mechanism comprises:
a drive unit;
the branch pipe is vertically arranged and used for fixing the pressure measuring part, and the top end of the branch pipe is fixed;
the winding roll is connected to the output end of the driving unit and synchronously rotates with the encoder, a cable is wound on the winding roll and is respectively connected with the pressure measuring piece to drive the pressure measuring piece to move along the branch pipe up and down.
7. The apparatus as claimed in claim 6, further comprising:
and the conductive slip ring is coaxially arranged with the winding roll.
8. A device for detecting the thickness of a liquid interface and a material deposit as claimed in claim 5 or 6, wherein the pressure measuring member is fixed to a bracket, and the bracket is connected to the branch pipe by a second connecting member.
9. A liquid interface and material deposit thickness detection apparatus as claimed in claim 5 or 6, wherein a limit switch is provided in the moving direction of the pressure measurement member to limit the moving distance of the pressure measurement member.
10. The apparatus for detecting the thickness of a liquid interface and a material deposit according to claim 1, further comprising:
the control system is in communication connection with the pressure measuring part, the lifting mechanism and the encoder respectively, and is used for receiving signals of the pressure measuring part and the encoder and controlling the lifting mechanism to act;
and the operation panel is in communication connection with the control system and is used for setting and displaying parameters.
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| CN202020784401.1U CN211954321U (en) | 2020-05-13 | 2020-05-13 | Liquid interface and material deposition thickness detection device |
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| CN202020784401.1U CN211954321U (en) | 2020-05-13 | 2020-05-13 | Liquid interface and material deposition thickness detection device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112945344A (en) * | 2021-03-03 | 2021-06-11 | 北矿机电科技有限责任公司 | Paste thickener material layer position online detection method and device |
| CN114440804A (en) * | 2021-12-30 | 2022-05-06 | 中国船舶重工集团公司第七一九研究所 | Automatic measuring system for thickness of sea mud in pump room of nuclear power plant and application |
-
2020
- 2020-05-13 CN CN202020784401.1U patent/CN211954321U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112945344A (en) * | 2021-03-03 | 2021-06-11 | 北矿机电科技有限责任公司 | Paste thickener material layer position online detection method and device |
| CN114440804A (en) * | 2021-12-30 | 2022-05-06 | 中国船舶重工集团公司第七一九研究所 | Automatic measuring system for thickness of sea mud in pump room of nuclear power plant and application |
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