CN118209181B - Capacitive intelligent liquid level meter - Google Patents
Capacitive intelligent liquid level meter Download PDFInfo
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- CN118209181B CN118209181B CN202410634580.3A CN202410634580A CN118209181B CN 118209181 B CN118209181 B CN 118209181B CN 202410634580 A CN202410634580 A CN 202410634580A CN 118209181 B CN118209181 B CN 118209181B
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- 239000007788 liquid Substances 0.000 title claims abstract description 175
- 230000007246 mechanism Effects 0.000 claims abstract description 76
- 239000000725 suspension Substances 0.000 claims abstract description 37
- 239000000523 sample Substances 0.000 claims abstract description 19
- 230000005540 biological transmission Effects 0.000 claims description 33
- 230000007306 turnover Effects 0.000 claims description 20
- 238000005259 measurement Methods 0.000 claims description 19
- 238000009413 insulation Methods 0.000 claims description 10
- 238000007789 sealing Methods 0.000 claims description 4
- 238000001514 detection method Methods 0.000 claims description 3
- 230000001360 synchronised effect Effects 0.000 claims description 2
- 230000008859 change Effects 0.000 abstract description 28
- 238000003756 stirring Methods 0.000 abstract description 9
- 230000001681 protective effect Effects 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000035945 sensitivity Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 239000003990 capacitor Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000013019 agitation Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000007667 floating Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
Classifications
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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
- G01F23/22—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 measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
- G01F23/26—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 measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields
- G01F23/263—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 measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields by measuring variations in capacitance of capacitors
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C5/00—Measuring height; Measuring distances transverse to line of sight; Levelling between separated points; Surveyors' levels
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D9/00—Level control, e.g. controlling quantity of material stored in vessel
- G05D9/12—Level control, e.g. controlling quantity of material stored in vessel characterised by the use of electric means
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Power Engineering (AREA)
- Automation & Control Theory (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Electromagnetism (AREA)
- Thermal Sciences (AREA)
- Fluid Mechanics (AREA)
- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
Abstract
The invention relates to the technical field of liquid level meters, and discloses a capacitive intelligent liquid level meter, which comprises a transmitter and a probe mechanism, wherein the transmitter and the probe mechanism are arranged on a container, the probe mechanism comprises an inner polar plate, and an insulating sleeve is sleeved on the outer side of the inner polar plate; the insulating sleeve further comprises an insulating shell, the insulating shell is arranged on the transmitter through a connecting piece, a measuring cavity and a liquid inlet cavity are formed in the insulating shell, the insulating sleeve is arranged in the measuring cavity, and the measuring cavity and the liquid inlet cavity are communicated through a valve mechanism; a plurality of liquid level difference measuring mechanisms are circumferentially arranged in the container, each liquid level difference measuring mechanism comprises a straight rod, and a suspension ball is arranged on each straight rod in a sliding manner; according to the capacitive intelligent liquid level meter, through measuring fluctuation of liquid level at each position in the container, the speed of medium in the container entering and exiting the measuring electrode outer protection tube and opening and closing are intelligently controlled through liquid level difference, so that inaccurate measuring results caused by false liquid level change caused by stirring of the medium in the container are reduced.
Description
Technical Field
The invention relates to the technical field of liquid level meters, in particular to a capacitive intelligent liquid level meter.
Background
The capacitance level gauge is a measuring instrument which measures the level of a medium in a container by utilizing the change of capacitance. In the container, the walls of the container made of the electrode and the conductive material form a capacitor. For a given electrode, when the dielectric constant of the medium to be measured is constant, a fixed frequency measurement voltage is applied to the electrode, and the current through the capacitor is dependent on and proportional to the height of the medium between the capacitor electrodes.
The capacitance liquid level meter is usually provided with two probes of the cable type and the rod type, wherein the cable type probe is a measuring electrode at the upper part of the liquid level, the lower end of the cable type probe is connected with the balancing weight to contact the bottom wall of the container, and the rod type probe is a measuring electrode which directly extends to the bottom wall of the container. The measuring electrode consists of an inner polar plate and an insulating sleeve.
In the prior art, in order to avoid that a large amount of bubbles are generated in a container due to medium reaction or false liquid level change generated by working conditions such as stirring of the medium is required to influence measurement of a capacitance liquid level meter, a protective tube is usually additionally arranged outside a probe, a bottom opening or a hole of the tube is used for allowing the medium in the container to enter, and the hole at the upper part of the tube wall is used for discharging the bubbles in the tube. However, the effect of reducing the influence of medium fluctuation in the container on the liquid level measurement is limited only by means of one protection tube, and when the medium fluctuation is large in the whole stirring process, the medium flow at the bottom of the container is also influenced to enter and exit the protection tube faster or slower, so that the accuracy of the measurement result is reduced.
Therefore, in order to solve the technical problems in the prior art, a capacitive intelligent liquid level meter is provided.
Disclosure of Invention
The invention provides a capacitance type intelligent liquid level meter, which has the beneficial effects that the speed of medium in a container entering and exiting a protective tube outside a measuring electrode and the opening and closing of the protective tube are intelligently controlled by measuring the fluctuation of the liquid level at each position in the container through the liquid level difference, so that the inaccurate measuring result caused by false liquid level change caused by stirring the medium in the container is reduced, the problem that in the prior art mentioned in the background art, the effect of reducing the influence of medium fluctuation in the container on the liquid level measurement is limited only by means of one protective tube is solved, and when the fluctuation of the whole medium is larger due to stirring, the medium flow at the bottom of the container is influenced faster or slower by entering and exiting the protective tube, and the accuracy of the measuring result is reduced is solved.
The invention provides the following technical scheme: the capacitive intelligent liquid level meter is used for detecting the liquid level of a medium in a container and comprises a transmitter and a pole probing mechanism which are arranged on the container, wherein the pole probing mechanism comprises an inner polar plate, and an insulating sleeve is sleeved on the outer side of the inner polar plate;
The insulation sleeve further comprises an insulation shell, the insulation shell is installed on the transmitter through a connecting piece, a measurement cavity and a liquid inlet cavity are formed in the insulation shell, the insulation sleeve is installed in the measurement cavity, and the measurement cavity and the liquid inlet cavity are communicated through a valve mechanism;
a plurality of liquid level difference measuring mechanisms are circumferentially arranged in the container, each liquid level difference measuring mechanism comprises a straight rod, two ends of each straight rod are respectively connected to the bottom wall and the top wall of the container, and a suspension ball is slidably arranged on each straight rod;
When the medium in the container passes through the liquid inlet cavity and the valve mechanism and enters the measuring cavity, and the liquid level in the container is consistent with the liquid level in the insulating shell for liquid level detection, the valve mechanism is controlled to be opened and closed by the height difference of a plurality of suspension balls floating along with the liquid level.
As an alternative to the capacitive intelligent level gauge of the present invention, wherein: the insulating shell is provided with a plurality of liquid guide holes and a plurality of exhaust holes, the liquid guide holes are communicated with the liquid inlet cavity and used for feeding liquid, and the exhaust holes are communicated with the measuring cavity and used for exhausting bubbles in a medium in the measuring cavity;
the valve mechanism comprises a valve seat arranged in the insulating shell, the measuring cavity and the liquid inlet cavity are separated by the valve seat, and a spherical valve core is rotatably arranged in the valve seat.
As an alternative to the capacitive intelligent level gauge of the present invention, wherein: an outer liquid inlet hole is formed in one side of the valve seat, which is positioned in the liquid inlet cavity, an outer liquid outlet hole is formed in one side of the valve seat, which is positioned in the measuring cavity, an inner liquid inlet hole is formed in one side of the spherical valve core, which is positioned in the liquid inlet cavity, and an inner liquid outlet hole is formed in one side of the spherical valve core, which is positioned in the measuring cavity;
The diameter of the inner liquid inlet hole is smaller than that of the outer liquid inlet hole, and the diameter of the inner liquid outlet hole is smaller than that of the outer liquid outlet hole.
As an alternative to the capacitive intelligent level gauge of the present invention, wherein: a sealing ring is arranged in the valve seat, a turnover plate is arranged in the measurement cavity, a T-shaped connecting rod is arranged on the turnover plate in a sliding manner, and the T-shaped connecting rod is connected with the spherical valve core;
The container is internally provided with a plurality of first transmission mechanisms, the suspension balls are respectively connected with the overturning plate through the first transmission mechanisms, and when the suspension balls have height differences, the overturning plate is controlled to overturn through the first transmission mechanisms so as to drive the spherical valve core to rotate.
As an alternative to the capacitive intelligent level gauge of the present invention, wherein: the first transmission mechanism comprises a lifting rod which is arranged on the insulating shell in a sliding manner, and the lifting rod realizes synchronous lifting with the suspension ball through the second transmission mechanism;
The turnover plate sequentially passes through the first angle adjusting assembly, the second angle adjusting assembly and the distance adjusting assembly to be connected with the lifting rod.
As an alternative to the capacitive intelligent level gauge of the present invention, wherein: the first angle adjusting component comprises a fixed seat arranged on the turnover plate, a first rotating shaft is rotatably arranged on the fixed seat, and a first rotating seat is arranged on the first rotating shaft.
As an alternative to the capacitive intelligent level gauge of the present invention, wherein: the second angle adjusting component comprises a second swivel mount, a transmission rod and a third swivel mount, the second swivel mount is rotationally arranged on the first swivel mount, a second rotating shaft and a third rotating shaft are respectively arranged at two ends of the transmission rod, the second rotating shaft is rotationally connected to the second swivel mount, and the third rotating shaft is rotationally connected to the third swivel mount.
As an alternative to the capacitive intelligent level gauge of the present invention, wherein: the distance adjusting assembly comprises a horizontal chute arranged on the lifting rod, a sliding block is arranged in the horizontal chute in a sliding mode, and the third rotary seat is rotationally connected to the sliding block.
As an alternative to the capacitive intelligent level gauge of the present invention, wherein: the second transmission mechanism comprises an L-shaped connecting rod arranged on the suspension ball, a lifting groove is formed in the L-shaped connecting rod, and the lifting rod is connected in the lifting groove in a sliding mode.
As an alternative to the capacitive intelligent level gauge of the present invention, wherein: the lifting rod is connected with the L-shaped connecting rod through a bolt, and a nut is connected to the bolt in a threaded mode.
The invention has the following beneficial effects:
1. On the basis of installing an insulating shell outside a probe in the prior art, the capacitive intelligent liquid level meter is provided with a valve mechanism in the insulating shell, wherein the valve mechanism consists of a valve seat and a spherical valve core, and a through hole on the spherical valve core realizes a measuring cavity for medium in a container to enter and exit and contact with a measuring electrode. And a plurality of liquid level difference measuring mechanisms are arranged in the container, and the liquid level difference measuring mechanisms are used for measuring the liquid level differences of the medium in the container at different positions. In the normal fluctuation range of the medium, the height difference is not large, at the moment, the through hole on the spherical valve core is not blocked, and the medium normally enters and exits to measure the liquid level. When the medium in the container fluctuates greatly due to stirring, the spherical valve core can be intelligently controlled to deflect by a certain angle, so that the spherical valve core is shielded by the inner wall of the valve seat, a gap exists between the corresponding liquid level change in the measuring cavity and the liquid level change in the container, and the liquid level change in the measuring cavity is smaller or unchanged. Therefore, the influence of false liquid level change generated by stirring on the accuracy of a measurement result is reduced.
2. The number of the liquid level difference measuring mechanisms is more than two, and the liquid level difference measuring mechanisms are circumferentially distributed in the container based on the whole of the probe mechanism, so that the accuracy of measuring the height difference of fluctuation of the liquid level of the medium is improved. The plurality of suspension balls are connected with a turnover plate arranged on the upper side of the spherical valve core through a transmission structure, and when the heights of the plurality of suspension balls are different, the turnover plate and the spherical valve core are driven to deflect different angles in corresponding directions.
3. The capacitive intelligent liquid level meter also considers the influence of the liquid level on the bottom medium flow because the insulating shell is positioned at the bottom wall of the container and contacts with the bottom medium flow. When the liquid level is higher, the influence of fluctuation of the medium on the flow velocity of the medium flow at the bottom is smaller, the position of the turnover plate is relatively higher, namely the radius of circular motion of the spherical valve core is larger, and the sensitivity of the opposite spherical valve core to control the opening degree by rotating under the influence of the liquid level difference is lower. When the liquid level is low, the influence of fluctuation of the medium on the flow speed of the medium flow at the bottom is large, the position of the turnover plate is relatively low, and the sensitivity of the spherical valve core is high. And the specific sensitivity range can be adjusted by the second transmission.
Drawings
Fig. 1 is a schematic diagram of the overall structure of the present invention.
Fig. 2 is a schematic cross-sectional view of the whole structure of the present invention.
FIG. 3 is a schematic view of a first cross-sectional structure of the probe mechanism of the present invention.
FIG. 4 is a schematic diagram of a second cross-sectional configuration of the sonde mechanism of the present invention.
Fig. 5 is a partial enlarged view at a in fig. 4.
Fig. 6 is a partial enlarged view at B in fig. 4.
FIG. 7 is a schematic cross-sectional view of a valve mechanism of the present invention.
FIG. 8 is a schematic view of the valve mechanism of the present invention.
Fig. 9 is a schematic diagram of the rotation principle of the ball valve core in the invention.
Fig. 10 is a schematic view of an exploded construction of the valve mechanism of the present invention.
Fig. 11 is a schematic diagram of an exploded structure of the first transmission mechanism in the present invention.
In the figure: 100. a container; 200. a transmitter; 300. a coupling; 400. a probe mechanism; 410. an inner polar plate; 420. an insulating sleeve; 430. an insulating housing; 440. a measurement cavity; 450. a liquid inlet cavity; 460. a liquid guiding hole; 470. an exhaust hole; 500. a valve mechanism; 510. a valve seat; 520. a spherical valve core; 530. an outer liquid inlet hole; 540. an outer liquid outlet hole; 550. an inner liquid inlet hole; 560. an inner liquid outlet hole; 570. a seal ring; 580. a turnover plate; 590. a T-shaped connecting rod; 600. a liquid level difference measuring mechanism; 610. a straight rod; 620. a suspending ball; 700. a first transmission mechanism; 710. a lifting rod; 720. a first angle adjustment assembly; 721. a fixing seat; 722. a first rotating shaft; 723. a first swivel mount; 730. a second angle adjustment assembly; 731. a second swivel mount; 732. a transmission rod; 733. a second rotating shaft; 734. a third swivel mount; 735. a third rotating shaft; 740. a distance adjustment assembly; 741. a horizontal chute; 742. a slide block; 800. a second transmission mechanism; 810. an L-shaped connecting rod; 820. a lifting groove; 830. a bolt; 840. and (3) a nut.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Examples
A protective tube is added outside the probe electrode formed by the inner polar plate 410 and the insulating sleeve 420, so that false liquid level change caused by fluctuation of the liquid level at the probe electrode due to large fluctuation of stirring of the medium in the container can be avoided to a certain extent, and false liquid level change caused by a large amount of bubbles generated by the medium in the container can be avoided. However, the inner cavity of the protection tube is still directly communicated with the inner cavity of the container, and the capacity of resisting medium fluctuation interference is limited, so that the first embodiment is proposed;
Referring to fig. 1-10, a capacitive intelligent liquid level meter is used for detecting the liquid level of a medium in a container 100, the capacitive intelligent liquid level meter comprises a transmitter 200 and a probe mechanism 400 which are installed on the container 100, the probe mechanism 400 comprises an inner polar plate 410, and an insulating sleeve 420 is sleeved outside the inner polar plate 410;
The insulating sleeve 420 further comprises an insulating shell 430, the insulating shell 430 is installed on the transmitter 200 through the connecting piece 300, a measuring cavity 440 and a liquid inlet cavity 450 are formed in the insulating shell 430, the insulating sleeve 420 is installed in the measuring cavity 440, and the measuring cavity 440 and the liquid inlet cavity 450 are communicated through the valve mechanism 500;
A plurality of liquid level difference measuring mechanisms 600 are also circumferentially arranged in the container 100, the liquid level difference measuring mechanisms 600 comprise a straight rod 610, two ends of the straight rod 610 are respectively connected to the bottom wall and the top wall of the container 100, and a suspension ball 620 is slidably arranged on the straight rod 610;
When the medium in the container 100 enters the measuring cavity 440 through the liquid inlet cavity 450 and the valve mechanism 500, and the liquid level in the container 100 is consistent with the liquid level in the insulating shell 430 for liquid level detection, the valve mechanism 500 is controlled to be opened and closed by the height difference of a plurality of suspension balls 620 floating along with the liquid level;
The insulating shell 430 is provided with a plurality of liquid guide holes 460 and a plurality of exhaust holes 470, the liquid guide holes 460 are communicated with the liquid inlet cavity 450 for liquid inlet, and the exhaust holes 470 are communicated with the measuring cavity 440 for exhausting bubbles in the medium in the measuring cavity 440;
The valve mechanism 500 includes a valve seat 510 provided in an insulating housing 430, the measurement chamber 440 and the liquid inlet chamber 450 being separated by the valve seat 510, the valve seat 510 being rotatably provided with a ball-shaped valve core 520;
an outer liquid inlet hole 530 is formed in one side of the valve seat 510, which is positioned in the liquid inlet cavity 450, an outer liquid outlet hole 540 is formed in one side of the valve seat 510, which is positioned in the measuring cavity 440, an inner liquid inlet hole 550 is formed in one side of the spherical valve core 520, which is positioned in the liquid inlet cavity 450, and an inner liquid outlet hole 560 is formed in one side of the spherical valve core 520, which is positioned in the measuring cavity 440;
the inner liquid inlet 550 has a smaller diameter than the outer liquid inlet 530 and the inner liquid outlet 560 has a smaller diameter than the outer liquid outlet 540;
A sealing ring 570 is arranged in the valve seat 510, a turnover plate 580 is arranged in the measuring cavity 440, a T-shaped connecting rod 590 is arranged on the turnover plate 580 in a sliding manner, and the T-shaped connecting rod 590 is connected with the spherical valve core 520;
The container 100 is further provided with a plurality of first transmission mechanisms 700, the plurality of suspension balls 620 are respectively connected with the overturning plate 580 through the plurality of first transmission mechanisms 700, and when the plurality of suspension balls 620 have a height difference, the overturning plate 580 is controlled to overturn through the plurality of first transmission mechanisms 700 so as to drive the spherical valve core 520 to rotate.
In this embodiment: transmitter 200 can be installed outside container 100 through modes such as flange, installs structures such as acquisition circuit in the transmitter 200, and interior polar plate 410 and acquisition circuit have electric connection, and insulating casing 430 passes through connector 300 to be installed in the transmitter 200 lower extreme. The bottom end of the insulating case 430 contacts the bottom wall of the container 100, the inner plate 410 contacts the bottom wall of the insulating case 430, and the insulating sleeve 420 is sleeved outside the inner plate 410 for protection. The plurality of air vents 470 function to vent air bubbles and also reduce the effect of air bubbles on the level change.
After the medium is injected into the container 100, the medium enters the liquid inlet cavity 450 through the plurality of liquid guide holes 460 and then enters the measuring cavity 440 through the valve mechanism 500, finally the liquid level outside the insulating shell 430 and the liquid level in the measuring cavity 440 keep consistent, one electrode is formed by the inner polar plate 410, the liquid level outside the insulating sleeve 420, namely the liquid level in the measuring cavity 440, the liquid level in the container 100 and the container form the other electrode, and when the relative dielectric constant does not change, the change of the liquid level in the container 100 can be measured through the capacitance change of the two electrodes measured by the acquisition circuit in the transmitter 200.
While the inner cavity of the insulating housing 430 is partitioned by the valve seat 510 into two spaces, an upper measurement chamber 440 and a lower liquid intake chamber 450. In the simple ball valve structure formed by the valve seat 510 and the ball valve core 520, medium in the liquid inlet cavity 450 enters the measuring cavity 440 through the inner liquid inlet hole 550 and the inner liquid outlet hole 560. The sealing ring 570 plays a role of reinforcing the seal. Ball valve core 520 differs from a typical ball valve in that it can rotate on multiple axes rather than a single axis of rotation of the ball valve.
A straight rod 610 is installed in the container 100, and the suspension ball 620 on the straight rod 610 is lifted along with the height of the liquid level. The liquid level difference measuring mechanism 600 is provided with at least two and distributed at different positions in the container 100.
When the medium level in the container 100 is a plane, the plurality of suspension balls 620 have uniform height, which controls the flip plate 580 to be in a horizontal state, and the ball valve core 520 connected to the flip plate 580 by the T-shaped connecting rod 590 is also in a vertical state as shown in fig. 3 and 4, and the medium entering and exiting the measuring chamber 440 is not affected.
When the liquid level rises and falls, the plurality of suspension balls 620 also drive the turnover plate 580 to rise and fall, and when the liquid level is not rising and falling, the height difference of the plurality of suspension balls 620 is not great, the spherical valve core 520 may deflect by a small angle based on the vertical axis in all directions, at this time, the inner liquid inlet 550 is still in contact with the medium in the liquid inlet 450 in all areas, and the medium is not influenced in and out of the measuring cavity 440.
While there may be a large difference in height of the suspension balls 620 at different positions when the medium in the container 100 is stirred. At this time, the larger height difference drives the overturning plate 580 to deflect a larger angle towards a certain direction by the spherical center of the spherical valve core 520, and at this time, the inner liquid inlet 550 is blocked by the outer liquid inlet 530 partially or completely, which results in a decrease in the medium inlet and outlet speed in the measuring cavity 440 or complete incapability of inlet and outlet. When the liquid level in the container 100 returns to a calm state, the ball valve element 520 returns to a state in which the inner liquid inlet 550 is completely opened.
Thereby reducing the influence of false liquid level change on the measurement result caused by fluctuation of the medium due to stirring.
It should be noted that, the positions of the valve seat 510 and the ball valve core 520 should be below the lowest liquid level in the container 100, and it is generally detected that the medium in the container 100 is at the lowest liquid level, and if the lowest liquid level is too low, the valve seat 510 and the ball valve core 520 may be at the lowest liquid level by starting a groove at the bottom of the container 100 and moving the probe mechanism 400 downward as a whole.
Examples
To control the opening and closing of the valve mechanism 500 by the height difference of the plurality of suspension balls 620 along with the fluctuation of the liquid level, a second embodiment is proposed;
The present embodiment is an improved description based on the first embodiment, specifically referring to fig. 2 to 11, the first transmission mechanism 700 includes a lifting rod 710 slidably disposed on the insulating housing 430, and the lifting rod 710 is capable of lifting and lowering the suspension ball 620 synchronously through the second transmission mechanism 800;
The turnover plate 580 is connected with the lifting rod 710 sequentially through the first angle adjusting assembly 720, the second angle adjusting assembly 730 and the distance adjusting assembly 740;
the first angle adjusting assembly 720 includes a fixed base 721 disposed on the turnover plate 580, a first rotating shaft 722 is rotatably disposed on the fixed base 721, and a first rotating base 723 is disposed on the first rotating shaft 722;
The second angle adjusting assembly 730 comprises a second swivel mount 731, a transmission rod 732 and a third swivel mount 734, the second swivel mount 731 is rotatably arranged on the first swivel mount 723, two ends of the transmission rod 732 are respectively provided with a second rotating shaft 733 and a third rotating shaft 735, the second rotating shaft 733 is rotatably connected to the second swivel mount 731, and the third rotating shaft 735 is rotatably connected to the third swivel mount 734;
the distance adjusting component 740 comprises a horizontal chute 741 arranged on the lifting rod 710, a sliding block 742 is slidably arranged in the horizontal chute 741, and a third swivel base 734 is rotatably connected to the sliding block 742.
In this embodiment: first, the fluctuation of the liquid level varies at each position when the medium in the container 100 is stirred, so that the more the number of the liquid level difference measuring mechanisms 600, the more accurate the measurement result of the fluctuation of the liquid level, the three liquid level difference measuring mechanisms 600 are arranged in the figure, and the liquid level difference measuring mechanisms 600 are distributed in the container 100 at equal intervals in the circumferential direction to increase the accuracy of the measurement result. More than three may be provided.
The corresponding turning plate 580 is configured in the shape of a tri-impeller, and three equal-length rod-like extensions of the turning plate 580 are respectively connected to the three fixing bases 721, so that the central axis of the turning plate 580 is consistent with the central axes of the T-shaped connecting rod 590 and the ball-shaped valve core 520. The three lifters 710 to which the three suspension balls 620 are connected are also circumferentially distributed based on the central axis of the ball-shaped spool 520.
When the three suspension balls 620 are identical in height, the three lifting bars 710 are identical in height, and the flip plate 580 is maintained in a horizontal state. It is assumed that one of the three suspension balls 620 is disposed in the left-right direction, and the other two suspension balls are disposed at equal intervals of 120 °. At this time, when the position of one suspension ball 620 on the left side is higher and the heights of the two suspension balls 620 on the right side are identical, as shown in fig. 7 and 8, the spherical valve core 520 takes the vertical line on the vertical plane where the suspension ball 620 on the left side is located as the axis, that is, the axis in the front-rear direction, and rotates clockwise by a certain angle based on the axis, as shown in fig. 7, the inner liquid inlet 550 is blocked by the inner wall of the outer liquid inlet 530, so that the inlet and outlet flow is reduced, and when the rotation angle is larger, the inner liquid inlet 550 is completely blocked by the outer liquid inlet 530.
Also taking the left set of first actuators 700 and the left end of the flipping plate 580 as an example, the transmission between the lifting bar 710 and the flipping plate 580 may involve a change in distance in the left-right direction, a change in height of the end surfaces of the lifting bar 710 and the flipping plate 580, a change in angle based on the horizontal plane, and a change in angle based on the top surface of the flipping plate 580.
The distance change in the left-right direction is realized by sliding the slide block 742 left and right in the horizontal groove 741, the angle change based on the horizontal plane is realized by rotating the third swivel base 734 on the slide block 742, the height change of the end surfaces of the lifting rod 710 and the turnover plate 580 is realized by a connecting rod structure composed of the third swivel base 734, the third rotating shaft 735, the transmission rod 732, the second rotating shaft 733 and the second swivel base 731, and the angle change based on the top surface of the turnover plate 580 is realized by rotating the second swivel base 731 on the first swivel base 723.
Specifically, when the ball valve member 520 is deflected as shown in fig. 7 and 8, the left lifter bar 710 moves left and right, the left driver 732 is still kept on the left-right vertical surface and rotated by the third rotation shaft 735, and the right lifter bars 710 slide on the horizontal surface, but the respective third swivel mounts 734 are rotated by the horizontal surface to deflect the driver 732.
Examples
On the basis of realizing the control of the opening and closing of the spherical valve core 520 by the height difference of the medium liquid level in the container 100 at different positions, a third embodiment is provided for realizing the control of the opening and closing variation of the spherical valve core 520 for specific height differences;
The present embodiment is an improvement on the basis of the second embodiment, specifically referring to fig. 2-10, the second transmission mechanism 800 includes an L-shaped connecting rod 810 disposed on the suspension ball 620, a lifting slot 820 is formed on the L-shaped connecting rod 810, and the lifting rod 710 is slidably connected in the lifting slot 820;
Lifting bar 710 and L-shaped link 810 are connected by a bolt 830, and a nut 840 is screwed to bolt 830.
In this embodiment: the effect of using a height-variable flip plate 580 to indirectly control the rotation of ball-shaped valve element 520 is also that, as shown in fig. 10, flip plate 580 is in a horizontal position, perpendicular to the central axis of ball-shaped valve element 520, i.e., a vertical axis. In fig. 10, the reference numeral of the flip plate 580 refers to the height of the flip plate 580, and the T-shaped link 590 and the flip plate 580 are regarded as a telescopic rod, the length of the upper rod is small, that is, the distance of the flip plate 580 lifting relative to the T-shaped link 590 is large, and the length of the lower rod is large.
The turning state of the turning plate 580 is uniform under the same height difference change, and in fig. 10, it is assumed that the turning state of the turning plate 580 is uniform based on clockwise rotation of the vertical surface in the left-right direction, so that the radian of the rod change of the telescopic rod composed of the T-shaped connecting rod 590 and the turning plate 580 is uniform, but the lengths of the rods are not uniform in the upper and lower figures. The radius of the lower rod, namely the circular motion, is larger, and the corresponding angle change is smaller when the radian is consistent. The arc change is uniform by the vertical line control as shown in fig. 10, and the lower rod is longer and the angle of rotation of the ball valve core 520 is smaller.
That is, the higher the liquid level in the container 100, the higher the plurality of suspension balls 620, and the higher the position of the inversion plate 580, and the smaller the angle at which the ball valve body 520 rotates due to the fluctuation of the liquid level. The lower the impact of the overall agitation of the medium on the bottom medium flow when the liquid level in the vessel 100 is high, the valve mechanism 500 will control the medium flow rate to decrease or stop medium flow under relatively large liquid level fluctuations. When the liquid level in the container 100 is low, less agitation will cause a greater change in the bottom media flow rate, and the valve mechanism 500 will begin to control the media flow rate to decrease or stop the media flow under relatively small fluctuations in the liquid level.
And is adjustable to specifically address the effects of fluid level fluctuations caused by variations in the level of fluid within the container 100 on the sensitivity of the valve mechanism 500 actuation. By the arrangement of the second transmission 800.
Specifically, this is accomplished by adjusting the relative heights of lift pins 710 and suspension balls 620. The L-shaped link 810 and the lifting rod 710 are both screw-coupled with the bolt 830, and the relative heights of the lifting rod 710 and the suspension ball 620 can be fixed by adjusting the height of the lifting rod 710 relative to the L-shaped link 810 and then tightening the nut 840 to fix the bolt 830 to the L-shaped link 810.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
The foregoing is merely a preferred embodiment of the present invention, and it should be noted that it will be apparent to those skilled in the art that several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the scope of the invention.
Claims (6)
1. A capacitive intelligent level gauge for detecting the liquid level of a medium in a container (100), characterized in that: the capacitive intelligent liquid level meter comprises a transmitter (200) and a probe mechanism (400) which are arranged on the container (100), wherein the probe mechanism (400) comprises an inner polar plate (410), and an insulating sleeve (420) is sleeved on the outer side of the inner polar plate (410);
The insulation sleeve (420) further comprises an insulation shell (430), the insulation shell (430) is installed on the transmitter (200) through a connecting piece (300), a measurement cavity (440) and a liquid inlet cavity (450) are formed in the insulation shell (430), the insulation sleeve (420) is installed in the measurement cavity (440), and the measurement cavity (440) and the liquid inlet cavity (450) are communicated through a valve mechanism (500);
A plurality of liquid level difference measuring mechanisms (600) are circumferentially arranged in the container (100), the liquid level difference measuring mechanisms (600) comprise straight rods (610), two ends of each straight rod (610) are respectively connected to the bottom wall and the top wall of the container (100), and a suspension ball (620) is slidably arranged on each straight rod (610);
When the medium in the container (100) passes through the liquid inlet cavity (450) and the valve mechanism (500) and enters the measuring cavity (440), and the liquid level in the container (100) is consistent with the liquid level in the insulating shell (430) for liquid level detection, the opening and closing of the valve mechanism (500) are controlled by the height difference of a plurality of suspension balls (620) which float along with the liquid level;
A plurality of liquid guide holes (460) and a plurality of exhaust holes (470) are formed in the insulating shell (430), the liquid guide holes (460) are communicated with the liquid inlet cavity (450) for liquid inlet, and the exhaust holes (470) are communicated with the measuring cavity (440) for exhausting bubbles in a medium in the measuring cavity (440);
The valve mechanism (500) comprises a valve seat (510) arranged in the insulating shell (430), the measuring cavity (440) and the liquid inlet cavity (450) are separated by the valve seat (510), and a spherical valve core (520) is rotationally arranged in the valve seat (510);
An outer liquid inlet hole (530) is formed in one side of the valve seat (510) located in the liquid inlet cavity (450), an outer liquid outlet hole (540) is formed in one side of the valve seat (510) located in the measuring cavity (440), an inner liquid inlet hole (550) is formed in one side of the spherical valve core (520) located in the liquid inlet cavity (450), and an inner liquid outlet hole (560) is formed in one side of the spherical valve core (520) located in the measuring cavity (440);
The diameter of the inner liquid inlet hole (550) is smaller than the diameter of the outer liquid inlet hole (530), and the diameter of the inner liquid outlet hole (560) is smaller than the diameter of the outer liquid outlet hole (540);
a sealing ring (570) is arranged in the valve seat (510), a turnover plate (580) is arranged in the measuring cavity (440), a T-shaped connecting rod (590) is arranged on the turnover plate (580) in a sliding mode, and the T-shaped connecting rod (590) is connected with the spherical valve core (520);
A plurality of first transmission mechanisms (700) are further arranged in the container (100), the plurality of suspension balls (620) are respectively connected with the overturning plate (580) through the plurality of first transmission mechanisms (700), and when the plurality of suspension balls (620) have height differences, the overturning plate (580) is controlled to overturn through the plurality of first transmission mechanisms (700) so as to drive the spherical valve core (520) to rotate;
The first transmission mechanism (700) comprises a lifting rod (710) which is arranged on the insulating shell (430) in a sliding manner, and the lifting rod (710) realizes synchronous lifting with the suspension ball (620) through the second transmission mechanism (800);
The turnover plate (580) is connected with the lifting rod (710) through the first angle adjusting assembly (720), the second angle adjusting assembly (730) and the distance adjusting assembly (740) in sequence.
2. The capacitive intelligent level gauge according to claim 1, wherein: the first angle adjusting assembly (720) comprises a fixed seat (721) arranged on the turnover plate (580), a first rotating shaft (722) is rotatably arranged on the fixed seat (721), and a first rotating seat (723) is arranged on the first rotating shaft (722).
3. A capacitive intelligent level gauge according to claim 2, characterized in that: the second angle adjusting component (730) comprises a second swivel mount (731), a transmission rod (732) and a third swivel mount (734), the second swivel mount (731) is rotationally arranged on the first swivel mount (723), two ends of the transmission rod (732) are respectively provided with a second rotating shaft (733) and a third rotating shaft (735), the second rotating shaft (733) is rotationally connected to the second swivel mount (731), and the third rotating shaft (735) is rotationally connected to the third swivel mount (734).
4. A capacitive intelligent level gauge according to claim 3, characterized in that: the distance adjusting assembly (740) comprises a horizontal chute (741) arranged on the lifting rod (710), a sliding block (742) is arranged in the horizontal chute (741) in a sliding mode, and the third rotary seat (734) is rotatably connected to the sliding block (742).
5. The capacitive intelligent level gauge according to claim 1, wherein: the second transmission mechanism (800) comprises an L-shaped connecting rod (810) arranged on the suspension ball (620), a lifting groove (820) is formed in the L-shaped connecting rod (810), and the lifting rod (710) is slidably connected in the lifting groove (820).
6. The capacitive intelligent level meter of claim 5, wherein: the lifting rod (710) is connected with the L-shaped connecting rod (810) through a bolt (830), and a nut (840) is connected to the bolt (830) in a threaded mode.
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| CN202410634580.3A CN118209181B (en) | 2024-05-22 | 2024-05-22 | Capacitive intelligent liquid level meter |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112595382A (en) * | 2020-11-03 | 2021-04-02 | 创泽智能机器人集团股份有限公司 | Liquid level sensor suitable for service robot and compensation algorithm thereof |
| CN113776626A (en) * | 2021-08-13 | 2021-12-10 | 杭州海芯达科技有限公司 | Anti-fluctuation liquid level measuring device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT374589B (en) * | 1973-03-26 | 1984-05-10 | Eppmann Kirsten Dipl Ing | DEVICE FOR DETERMINING THE LEVEL ONLY FROM THE TOP OF ACCESSIBLE LIQUID GAS CONTAINERS |
| LU92018B1 (en) * | 2012-06-08 | 2013-12-09 | Luxembourg Patent Co | Capacitive level gauge assembly for a pressurized or liquefied gas container |
| JP6955945B2 (en) * | 2017-09-28 | 2021-10-27 | 大陽日酸株式会社 | Liquid level detection device, liquid level detection method, adapter kit, frozen product manufacturing system, and frozen product manufacturing method |
| CN214538142U (en) * | 2021-05-18 | 2021-10-29 | 武汉宇铭德仪表有限公司 | Novel barrel-type capacitance liquid level meter |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112595382A (en) * | 2020-11-03 | 2021-04-02 | 创泽智能机器人集团股份有限公司 | Liquid level sensor suitable for service robot and compensation algorithm thereof |
| CN113776626A (en) * | 2021-08-13 | 2021-12-10 | 杭州海芯达科技有限公司 | Anti-fluctuation liquid level measuring device |
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