CN109655135B - Liquid level sensor calibration device and calibration method - Google Patents
Liquid level sensor calibration device and calibration method Download PDFInfo
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- CN109655135B CN109655135B CN201910137933.8A CN201910137933A CN109655135B CN 109655135 B CN109655135 B CN 109655135B CN 201910137933 A CN201910137933 A CN 201910137933A CN 109655135 B CN109655135 B CN 109655135B
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- 239000007788 liquid Substances 0.000 title claims description 139
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- 238000012795 verification Methods 0.000 claims description 35
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- 238000006073 displacement reaction Methods 0.000 claims description 6
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- 238000009434 installation Methods 0.000 claims description 6
- 238000003825 pressing Methods 0.000 claims description 5
- 235000014676 Phragmites communis Nutrition 0.000 claims description 4
- 230000008878 coupling Effects 0.000 claims description 4
- 238000010168 coupling process Methods 0.000 claims description 4
- 238000005859 coupling reaction Methods 0.000 claims description 4
- 238000012545 processing Methods 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 3
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- 238000013461 design Methods 0.000 abstract description 4
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- 230000017525 heat dissipation Effects 0.000 description 2
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- 238000005259 measurement Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F25/00—Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume
- G01F25/20—Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume of apparatus for measuring liquid level
Abstract
The device comprises a mounting box, a control box, a guide rail and a sliding module, wherein the mounting box comprises a box upper plate, a box lower plate, a box bottom plate, a box left plate, a box right plate and a movable plate. The box body left plate is provided with a first scale plate, the inner surface of the box body left plate is provided with a first guide rail in the direction close to the first scale plate, and the movable plate is provided with a second guide rail; and the first guide rail is provided with a sliding module. The sliding module comprises a sliding rod, a mounting rod, a magnet block, a junction box, a lining support plate and a pointer. The movable plate is arranged at the leftmost end of the upper plate of the box body, the movable plate is provided with a second scale plate, and the movable plate is hinged with the left plate of the box body. The control box internally provided with a core controller, the core controller is connected with the sliding module through a driver, and the sliding module is driven to move in the guide rail. The utility model can improve the checking accuracy and linearity, and has the advantages of reliable design, compact structure and convenient operation.
Description
Technical Field
The utility model relates to the technical field of liquid level sensor verification, in particular to a liquid level sensor verification device and a verification method.
Background
The liquid level sensor and the liquid level switch are one of the automatic components used in most industrial production sites, especially a system with liquid level monitoring in an automatic control system, such as a top cover water level, a tank liquid level, a pressure tank liquid level, an upper guide bearing liquid level, a water upper guide tank liquid level and the like, and the analog quantity and the switch node of the liquid level sensor and the liquid level switch directly participate in the system control and monitoring, so that the liquid level sensor and the liquid level switch are widely applied. Under the condition that the system normally operates, the liquid level sensor and the liquid level switch can only act and measure in a normal interval, limit conditions at two ends, such as conditions of too low or too high liquid level interval or low liquid level interval, can not be detected in the area, a maintainer can normally perform a simulation test on site, and a manual magnetic node brushing is adopted to act nodes on equipment, so that the risk of misoperation or damage of the equipment exists; when the liquid level sensor is checked, a traditional displacement measurement mode is adopted, an operator manually moves the floating ball of the liquid level meter, then a universal meter is used for measuring a current value, and meanwhile, the displacement of the moving floating ball of the liquid level meter is also required to be measured.
At present, no reliable verification device exists in most industrial production sites, the verification work of a liquid level sensor and a liquid level switch is complex, the working efficiency is low, and the linearity of the liquid level sensor and the liquid level switch is inaccurate and unreliable after verification.
Disclosure of Invention
In order to solve the technical problems, the utility model provides a liquid level sensor calibration device and a calibration method, which are used for optimizing and researching a liquid level sensor and a liquid level switch calibration mode so as to improve the calibration accuracy and linearity and improve the equipment action reliability. The device has the advantages of reliable design, compact structure and convenient operation.
The technical scheme adopted by the utility model is as follows:
the utility model provides a level sensor verifying attachment, includes mounting box, control box, guide rail, slip module, mounting box case top plate, box hypoplastron, box bottom plate, box left side board, box right side board, fly leaf.
The upper plate of the box body is provided with an upper mounting groove, the lower plate of the box body is provided with a lower mounting groove, and a space formed between the lower plate of the box body and the bottom plate of the box body forms an operation chamber; the box body left plate is provided with a first scale plate, the inner surface of the box body left plate is provided with a first guide rail in the direction close to the first scale plate, and the movable plate is provided with a second guide rail; the first guide rail is provided with a sliding module;
the sliding module comprises a sliding rod, a mounting rod, a magnet block, a junction box, a lining support plate and a pointer;
the sliding rod is connected with the mounting rod, the junction box is arranged on the sliding rod, the mounting rod is provided with a mounting hole, a pointer is arranged in the mounting hole, and a magnet block or a lining support plate is arranged in the mounting hole;
the outer side of the right plate of the box body is connected with the left part of the control box;
the movable plate is arranged at the leftmost end of the upper plate of the box body, is provided with a second scale plate and is hinged with the left plate of the box body;
the control box internally provided with a core controller, the core controller is connected with the sliding module through a driver, and the sliding module is driven to move in the guide rail.
The installation box is reserved with a gap, namely: the upper plate and the lower plate of the box body are slightly recessed into a notch relative to the edge of the left plate of the box body, so that a movement space is reserved for the guide rail and the sliding module, and the upper plate and the lower plate of the box body are used for installing a liquid level sensor and a liquid level switch with longer top-mounted or side-mounted liquid level measuring rods.
The lower mounting groove is used for mounting a liquid level sensor and a liquid level switch with shorter top-mounted liquid level meter or liquid level measuring rod; the circular arcs at the top ends of the upper mounting groove and the lower mounting groove are positioned on the same coaxial line, and the upper mounting groove and the lower mounting groove are parallel on the upper box plate and the lower box plate.
The outer part of the left plate of the box body is provided with a supporting block with the same thickness as the movable plate at the height position when the left plate of the box body is placed down with the movable plate; the gravity when the supporting block is used for supporting the retraction, the shape of the gravity is a vertical bar, the gravity is vertical to the bottom surface of the bottom plate of the box body and parallel to the surface of the bottom plate of the box body, and the surface of the supporting block is provided with a rotary handle which is fixed by a positioning bolt, so that the rotary handle can rotate within a range of 180 degrees.
The mounting rod is provided with a strip-shaped mounting hole, a magnet block, a lining support plate and a pointer are arranged at any position in the mounting hole from inside to outside, the magnet block and the lining support plate point to the liquid level meter, the magnet block or the lining support plate is arranged according to actual needs, and the pointer is arranged at the outermost side of the mounting rod towards the direction of the scale plate and is fixed by a fixing bolt.
The joint of the topmost end of the left box body plate and the movable plate is provided with a clamping groove, and the movable plate and the left box body plate are linked by a hinge, so that the left box body plate can be freely folded and unfolded;
the middle part of the inner side of the movable plate is provided with a second guide rail, and the front part of the movable plate is provided with a second scale plate.
The control box 2 comprises control panel, protecgulum, right lid and hou gai, and the input of core controller is connected with input module, and the output is connected with output module, and the power end is connected with power module, and core controller still is connected with AD conversion module, and then drives the sliding module motion through the driver.
The input module is connected with an input terminal, a control button and an operation button, the input terminal is used for being connected with an input signal line of analog quantity and switching value of the liquid level sensor, and the input terminal is connected with the input module of the core controller; the operation button is used for controlling the operation mode of the liquid level sensor checking device and is divided into an automatic button and a manual button, the full stroke movement back and forth can be automatically completed in the automatic control mode, and the starting, the pause, the forward and the backward can be manually controlled by the control button in the manual control mode; the control button is provided with a start-stop key, a forward key and a backward key, only the start-stop key acts in an automatic mode, and the forward key, the start-stop key and the backward key can be operated in a manual mode.
The surface of the control panel is designed to be a downward slope surface with a downward slope of 30 degrees, namely the height of the rear cover is higher than that of the front cover, the control panel is provided with four indicator lamps, three digital display meters, two operation buttons and three control buttons, wherein the indicator lamps and the digital display meters are connected with an output module of the output end of the core controller, and the operation buttons and the control buttons are connected with an input module of the input end of the core controller.
The front cover is provided with a power switch and an input terminal, the power switch can control a power system of the device, other systems and modules of the device are supplied with power, and the power switch is connected with a power module of the core controller; the right cover is provided with a heat dissipation hole for discharging heat generated by the device; the rear cover is provided with a power line outlet hole of a power plug, and the power plug can supply power to the whole device by adopting a three-wire 220V voltage class.
The utility model relates to a liquid level sensor calibration device and a calibration method, which have the following technical effects:
1. the utility model can realize the operation of the device in an automatic check mode and a manual check mode through the processing of the core controller, can check the liquid level sensor and the liquid level switch in a full stroke, effectively avoids the check blind area of the traditional liquid level sensor, avoids the occurrence of unqualified check of the liquid level sensor or the setting error event of the liquid level switch caused by human factors, and improves the reliability of the check work of the liquid level sensor.
2. The utility model adopts the lining support plate to drive the floating ball to move, can truly simulate the working environment of the liquid level sensor, avoids the risk of misoperation or damage of equipment caused by the adoption of brushing magnetic nodes by maintenance personnel on site, improves the reliability of equipment operation, and reduces the risk of equipment damage.
3. The utility model adopts the digital display meter and the indicator lamp to intuitively display the related check data, so that maintenance personnel can conveniently operate the device and record the check data at the same time, and only one person is required to finish the check work of the liquid level sensor, thereby improving the working efficiency and reducing the labor cost.
4. The device skillfully utilizes the scale plate on the device, combines the synchronous movement of the sliding module and the pointer, and the mechanical pointer can intuitively indicate the current movement distance of the sliding module, and can intuitively compare the measurement errors of the sliding module and the pointer when being combined with the digital display meter, thereby further checking the checking accuracy of the device.
5. The device has strong applicability and good flexibility, the length of the movement track of the sliding module can be adjusted through the movable plate, the device can be suitable for the verification of liquid level sensors with different lengths, and the application range of the device is improved.
6. The utility model has compact structure, simple and convenient operation, complete functions and high automation level, optimizes the calibration mode of the traditional liquid level sensor and improves the calibration work efficiency.
7. On the basis of ensuring the practicability, the utility model has the advantages of simple design of the device, design of the core controller and other automatic control elements inside the device, and reduction of external redundant wiring, thus not only completing the verification function, but also having high efficiency.
Drawings
FIG. 1 is a schematic front view of a verification device of the present utility model;
FIG. 2 is a top view of a slide module on a verification device of the present utility model;
FIG. 3 is a left side view of the verification device of the present utility model;
fig. 4 is a schematic diagram of the control principle of the checking device of the present utility model.
Fig. 5 is a schematic perspective view of a sliding module of the checking device of the present utility model.
In the figure: 1-installing a box; 101-a box upper plate; 102, a lower plate of the box body; 103-a bottom plate of the box body; 104, a left plate of the box body; 105-right box plate; 106-upper mounting groove; 107-lower mounting groove; 108-an operation chamber; 109-a movable plate; 110-clamping grooves; a 111-hinge; 112-rotating the handle; 113-positioning bolts; 114-supporting blocks; 115-a scale plate; 116-bolts;
2-a control box; 201-a control panel; 202-a front cover; 203-right cover; 204-a rear cover;
3-a guide rail;
4-a sliding module; 401-a movable bar; 402-mounting a rod; 403-mounting holes; 404-fixing bolts; 405-magnet blocks; 406 a backing plate; 407-pointer; 408-junction box; 409-micro motor, 410-roller frame, 411-roller;
5-indicator lights; 6-a digital display table; 7-operating a button; 8-control buttons; 9-an input terminal; 10-heat dissipation holes; 11-a power plug; 12-a power switch;
13-inside the case; 1301-a core controller; 1302-an input module; 1303-an output module; 1304-a power module; 1305-a/D conversion module; 1306-a driver;
Detailed Description
As shown in FIGS. 1-4, the liquid level sensor verification device and the verification method thereof comprise an installation box, a control box, a guide rail, a sliding module, a core controller, a driver, an input module, an output module, a power module and an A/D conversion module.
As shown in fig. 1, the installation box 1 is positioned on the left side of the checking device of the present utility model, and includes a box upper plate 101, a box lower plate 102, a box bottom plate 103, a box left plate 104, a box right plate 105, and a movable plate 109.
The upper plate 101 of the box body is provided with an upper mounting groove 106, the upper plate 101 of the box body and the lower plate 102 of the box body are slightly recessed into a gap, a movement space is reserved for the track 3 and the sliding module 4, and the upper plate is used for mounting a liquid level sensor and a liquid level switch (not limited by the upper plate) with a longer top-mounted or side-mounted liquid level measuring rod, and is mainly used for mounting the liquid level sensor and the liquid level switch with floating balls;
the lower plate 102 of the box body is provided with a lower mounting groove 107 for mounting a liquid level sensor and a liquid level switch with shorter top-mounted liquid level meter or liquid level measuring rod; the circular arcs at the top ends of the upper mounting groove 106 and the lower mounting groove 107 are positioned on the same coaxial line, and the upper mounting groove and the lower mounting groove are parallel on the upper box plate 101 and the lower box plate 102;
the operation chamber 108 is located in a space formed between the lower case plate 102 and the bottom case plate 103 and is mainly used for installing a side-mounted liquid level sensor junction box;
a first scale plate 115 is designed on the front surface of the box body left plate 104, a first guide rail 3 is designed on the inner surface of the box body left plate in the direction close to the scale plate, and the first guide rail 3 of the box body left plate 104 is contacted with a second guide rail on the movable plate 109 in a sectionalized manner, but the first guide rail and the second guide rail are positioned on a straight line;
a sliding module 4 is arranged on the first guide rail 3; the outer part of the left box plate 104 is provided with a supporting block 114 with the same thickness as the movable plate 109 at the same height as the movable plate 109 when the movable plate 109 is laid down; as shown in fig. 3, the supporting block 114 is configured to support the gravity of the 109 during retraction, is in a vertical bar shape, is perpendicular to the bottom surface of the bottom plate 103 of the case and is parallel to the surface of the bottom plate, is simple in shape, environment-friendly and energy-saving, and is provided with a rotating handle 112 on the surface of the supporting block 114, and uses a positioning bolt 113 to fix the rotating handle, thereby ensuring that the rotating handle 112 can rotate within a range of 180 degrees.
As shown in fig. 2 and 5, the sliding module 4 is composed of a sliding rod 401, a mounting rod 402, a magnet block 405, a junction box 408, a backing plate 406, a pointer 407, and a driving module;
the sliding rod 401 and the mounting rod 402 are welded into a whole; the junction box 408 is provided on the slide bar 401.
The driving module includes: micro-motor 409, roller frame 410, roller 411, and driver 1306.
As shown in fig. 2 and 5, the sliding rod 401 is connected to the roller frame 410, the roller frame 410 is provided with a roller 411, the roller 411 is located on the first guide rail 3 at the initial position, and the micro motor 409 is connected to the roller 411 and drives the roller 411 to horizontally move on the first guide rail and the second guide rail. The driver 1306 is mounted in the junction box 408, and the driver 1306 is connected to the micro-motor 409 by wires. The driver receives the current value output by the A/D conversion module 1305, and the driver 1306 controls the micro motor 409 to drive the roller 411 to move horizontally back and forth on the guide rail according to the installation driving command. The scale marks on the first guide rail and the second guide rail are convenient for observing the displacement of the movement of the sliding module 4, and the liquid level meter can be accurately sent to a preset position, so that the liquid level meter is simple and convenient.
As shown in fig. 5, the first and second guide rails each include two rail units, on which bosses are disposed, and any one rail unit includes two rollers 411, where the rollers 411 are grooved rollers, so that the sliding module 4 does not deviate from the rail when running horizontally on the guide rail.
The mounting rod 402 is provided with a strip-shaped mounting hole 403, a magnet block 405, a lining board 406 and a pointer 407 are arranged at any position in the mounting hole 403 from inside to outside, wherein the magnet block 405 and the lining board 406 point to the liquid level meter, the magnet block 405 or the lining board 406 is arranged according to actual needs, the pointer 407 is arranged at the outermost side of the mounting rod 402 towards the direction of the scale plate 115, and the fixing bolt 404 is used for fixing and mounting.
The magnet block 405 is used for brushing a magnetic turning column of the liquid level meter, the magnetic turning column is a reed pipe and is magnetic, and the action of the magnetic turning column can trigger the action of the magnetic switch.
The outer side of the right box plate 105 is connected with the left part of the control box 2 into a whole.
The movable plate 109 is arranged at the leftmost end of the upper plate 101 of the box body, and a second scale plate is arranged on the front surface of the movable plate, and the second scale plate and the first scale plate 115 can be tightly contacted when the movable plate 109 is vertical, so that scales are integrated.
A clamping groove 110 is designed at the joint of the topmost end of the box body left plate 104 and the movable plate 109, and the movable plate 109 and the box body left plate 104 are linked by a hinge 111, so that the box body left plate 104 can be freely folded and unfolded. When the movable plate 109 is placed, the movable plate is fixed on the upper plate of the box body through the clamping groove 110; when the movable plate 109 is retracted, the movable plate is lowered along the outer side of the left plate 104 of the box body, the gravity of the movable plate is supported by the supporting block 114, and the movable plate is fixed by the rotary handle 112, so that the stability and the safety are improved. A second guide rail is designed at the middle part of the inner side of the movable plate 109.
The control box 2 is composed of a control panel 201, a front cover 202, a right cover 203 and a rear cover 204. The control box 2 is internally provided with a core controller 1301, as shown in fig. 4, an input end of the core controller 1301 is connected with an input module 1302, an output end is connected with an output module 1303, a power end is connected with a power module 1304, the core controller 1301 is also connected with an a/D conversion module 1305, and the sliding module 4 is driven to move by a driver 1306.
Core controller 1301 preferably uses 3CP380.60-1 CPU module, brand Bei Jialai.
The input module 1302 is preferably a 3DI486.6 digital quantity input module of Bei Jialai brand.
Output module 1303 preferably uses 3DO486.6 of Bei Jialai brand.
The power module 1304 preferably has a brand Bei Jialai of 3PS465.9.
The a/D conversion module 1305 preferably uses a lightning protection, surge protection, static protection, built-in watchdog, and a DAQM-4206 acquisition module supporting standard industrial communication protocols.
The stepper motor driver RORZE RD-053A is preferably used as the driver 1306.
The signals of the input module 1302 come from the input terminals 9, the control buttons 8 and the operation buttons 7. The input terminal 9 is used for being connected with an input signal line of the analog quantity and the switching value of the liquid level sensor, and is connected with an input module of the core controller; the operation button 7 is used for controlling the operation mode of the liquid level sensor checking device, and is divided into an automatic button and a manual button, wherein the automatic control mode can automatically complete the movement of a full stroke back and forth, and the manual control mode can manually control the starting, the pausing, the advancing and the retreating by using the control button 8. The control button 8 is provided with a start-stop key, a forward key and a backward key, only the start-stop key is used in an automatic mode, and the forward key, the start-stop key and the backward key can be operated in a manual mode.
The output signal of the output module 1303 is provided with a switching value signal output by a core controller to an indicator lamp 5 and an analog output signal to a digital display table 6; the indicator lamp 5 is used for indicating the action condition of a liquid level switch, and is generally defined as five indicating signals of over-low liquid level, high liquid level, over-high liquid level and fault alarm, and the five indicator lamps completely meet the liquid level indicating requirements of most industrial production sites; the digital display meter 6 is provided with a voltmeter, an ammeter and sensor displacement, replaces the voltmeter and the ammeter which are used conventionally, and can display data such as voltage, current and the like more intuitively.
The power module 1304 at the power source end can supply DC24V and DC220V power to the device, and provide different levels of voltage to the driver, the sensor, the liquid level switch and the device.
The surface of the control panel 201 is designed to be a downward slope with a downward slope of 30 degrees, i.e. the height of the rear cover 204 is higher than that of the front cover 202, and in consideration of convenience in operation and compliance with human body, four indicator lamps 5, three digital display meters 6, two operation buttons 7 and three control buttons 8 are designed, wherein the indicator lamps 5 and the digital display meters 6 are connected with an output module 1303 of an output end of the core controller, and the operation buttons 7 and the control buttons 8 are connected with an input module 1302 of an input end of the core controller.
The front cover 202 is designed with a power switch 12 and an input terminal 9, wherein the power switch 12 can control a power system of the device, supply power to other systems and modules of the device, and is connected with a power module of the core controller.
The right cover 203 is provided with a heat dissipation hole 10 for discharging heat generated by the device; the rear cover 204 is designed with a power line outlet hole of the power plug 11, and the power plug 11 can supply power to the whole device by adopting a three-wire 220V voltage level.
Examples:
in the embodiment, the check analog quantity and the switching value of the top-mounted floating ball liquid level sensor are taken as examples, and a specific working principle and a using method are explained. Working principle of top-mounted magnetic floating ball liquid level meter: the floating ball assembly is used as a measuring element and is manufactured according to the buoyancy principle and the magnetic coupling principle. When the liquid level in the container changes up and down, the floating ball is driven, and the permanent magnet steel at the upper end of the connecting rod connected with the floating ball moves up and down, so that the turning column in the display is turned over through magnetic coupling. When the liquid level rises, the turning column is changed from white to red, and when the liquid level falls, the turning column is changed from red to white, and the position of the red-white boundary is the actual height of the liquid level of the medium in the container, so that the automatic tracking display of the liquid level is realized. The top-mounted float switch is characterized in that a strong permanent magnetic field is arranged in a float connected to a rod, and when the float rises or falls along with the liquid level, the magnetic field generated in the float drives an airtight magnetic reed switch in the rod to generate a switching action.
According to the working principle, the checking device is combined to carry out wiring and assembly of the checking liquid level sensor.
First, installation: in this embodiment, the movable plate 109 and the guide rail mounted thereon are not required, and the movable plate 109 can be lowered to the support block 114 along the outer side of the left box plate 104 and fixed by the rotary handle 112 so as to avoid the potential safety hazard caused by free movement. The sliding module 4 is installed on the guide rail on the inner side of the left plate 104 of the box body, the sliding module 4 is only required to be provided with the lining support plate 406 and the pointer 407, the floating ball of the liquid level meter is set off by the lining support plate 406, and the pointer 407 points to the scale plate 115. The flange plate of the liquid level meter is arranged on the upper plate 101 of the box body through the upper mounting groove 106 and is fastened by bolts 116, and the floating ball is positioned in the space between the upper plate 101 of the box body and the lower plate 102 of the box body; the magnetic turning plate of the liquid level meter is positioned above the upper plate 101 of the box body, and two liquid level switches are respectively arranged on two sides of the magnetic turning plate of the liquid level meter and are respectively defined as too low, high and too high liquid level.
Second step, wiring: the signal of the level switch is connected to the input terminal 9 by a wire, and the analog signal of the level sensor is connected to the input terminal 9 by a wire through a terminal in the junction box thereof.
Third step, power supply: the power plug 11 is used for supplying DC220V power to the verification device, and the power switch 12 is closed to provide reliable power for all electric equipment of the verification device.
Fourth step, operation and working principle of the checking device:
the automatic mode comprises the following steps:
step (1), the automatic button of the operation button 7 of the control panel 201 is pressed, and the device is in an automatic operation mode.
In step (2), after the start/stop key of the control button 8 of the control panel 201 is pressed, the received automatic mode and start signal enter the core controller 1301 through the input module 1302 to process logic, and the sliding module 4 is driven to move through the driver 1306 after data processing of the a/D conversion module 1305, so that the device can automatically complete full-stroke movement from low position to high position and then to low position.
And (3) the lining support plate 406 of the sliding module 4 drives the floating ball of the liquid level meter to move together, and the permanent magnet steel at the upper end of the connecting rod connected with the floating ball moves up and down, so that the turning column in the magnetic turning plate is turned over through magnetic coupling, when the liquid level rises, the turning column is turned from white to red, when the liquid level falls, the turning column is turned from red to white, and the position of the red-white boundary is the actual height of the liquid level of the medium in the container. Meanwhile, the current and the liquid level signal of the liquid level meter are connected to the wiring terminal 9 through wires, and are transmitted to the digital display meter 6 of the control panel 201 after passing through the output module 1303 of the core controller 1301, so that automatic tracking and display of the liquid level are realized, and verification of the analog quantity of the liquid level sensor is completed.
When the floating ball rises or falls along with the liquid level, the magnetic field generated in the floating ball drives an airtight magnetic reed switch in the rod to enable the liquid level switches on two sides of the magnetic turning plate of the liquid level meter to act one by one, a signal wire of the liquid level switch is connected into the wiring terminal 9 through a wire, then enters the core controller 1301 through the input module 1302 to process logic and then is output, and then is output to the indicator lamp 5 on the control panel 201 through the output module 1303, so that verification of the liquid level switch is completed.
And (4) after the start and stop key of the control button 8 of the control panel 201 is pressed for the second time, stopping the operation of the sliding module 4, and stopping the operation of the device.
The manual mode comprises the following steps:
and (1) pressing a manual button of the operation button 7 of the control panel 201, wherein the device is in a manual operation mode, and the verification device is operated to verify the liquid level sensor according to the requirement.
After the start/stop key of the control button 8 on the control panel 201 is pressed for the first time in step (2), the device is in a ready-to-move state.
After the operator presses the forward key of the control button 8, the lining support plate 406 of the sliding module 4 drives the floating ball to move upwards all the time, the sliding module 4 stops moving upwards until the current is high and limited, and the sliding module is kept at the highest position and buzzes and alarms;
and (4) updating the voltmeter, the ammeter and the displacement of the digital display meter 6 on the control panel 201 in real time, and enabling the liquid level switches on two sides of the magnetic turning plate to act along with the movement of the floating ball to light the indicator lamps 5.
And (5) pressing a backward key of a control button 8 on the control panel 201 to enable the sliding module 4 to move downwards, enabling the floating ball of the liquid level meter to move downwards by the lining board 406, keeping the downward movement until the sliding module 4 can stop descending after the current is low and limit, keeping the lowest position and giving a buzzer alarm.
And step (6), in the process, when an operator presses the start-stop key of the control button 8 for the second time, the sliding module 4 stops moving, and the operator can record relevant check data and observe the action condition of the liquid level switch. In the manual verification process, an operator can repeat the process at any time, and the verification work of the analog quantity of the liquid level sensor and the switch can be manually completed.
Claims (8)
1. A liquid level sensor verification device comprises a mounting box (1), a control box (2), a guide rail (3) and a sliding module (4); the method is characterized in that: the mounting box (1) comprises a box upper plate (101), a box lower plate (102), a box bottom plate (103), a box left plate (104), a box right plate (105) and a movable plate (109);
the upper box body plate (101) is provided with an upper mounting groove (106), the lower box body plate (102) is provided with a lower mounting groove (107), and a space formed between the lower box body plate (102) and the bottom box body plate (103) forms an operation chamber (108);
the box body left plate (104) is provided with a first scale plate (115), a first guide rail (3) is designed on the inner surface of the box body left plate (104) in the direction close to the first scale plate (115), and a second guide rail is arranged on the movable plate (109);
a sliding module (4) is arranged on the first guide rail (3);
the sliding module (4) comprises a sliding rod (401), a mounting rod (402) and a driving module;
the sliding rod (401) is connected with the mounting rod (402), a mounting hole (403) is formed in the mounting rod (402), a pointer (407) is arranged in the mounting hole (403), and a magnet block (405) or a lining support plate (406) is arranged in the mounting hole (403);
the right box body plate (105) is connected with the control box (2);
the movable plate (109) is arranged at the leftmost end of the upper box plate (101), the movable plate (109) is provided with a second scale plate, and the movable plate (109) is hinged with the left box plate (104);
a core controller (1301) is arranged in the control box (2), the core controller (1301) is connected with the sliding module (4) through a driver (1306), and the sliding module (4) is driven to move in the guide rail;
the installation box (1) is reserved with a notch, namely: the upper plate (101) and the lower plate (102) of the box body slightly recess a notch relative to the edge of the left plate (104) of the box body, so as to leave a movement space for the guide rail and the sliding module (4) and be used for installing a liquid level sensor and a liquid level switch with longer top-mounted or side-mounted liquid level measuring rod;
the lower mounting groove (107) is used for mounting a liquid level sensor and a liquid level switch with shorter top-mounted liquid level meter or liquid level measuring rod; the circular arcs at the top ends of the upper mounting groove (106) and the lower mounting groove (107) are positioned on the same coaxial line, and the upper mounting groove and the lower mounting groove are parallel on the upper box plate (101) and the lower box plate (102).
2. A level sensor verification device according to claim 1, wherein: when the outer part of the left box body plate (104) is placed down with the movable plate (109), a supporting block (114) with the same thickness as the movable plate (109) is arranged at the height position; the supporting block (114) is used for supporting the gravity of the movable plate (109) during retraction, is shaped into a vertical bar, is vertical to the bottom surface of the bottom plate (103) of the box body and parallel to the surface of the bottom plate, and is provided with a rotary handle (112) on the surface of the supporting block (114), and is fixed by a positioning bolt (113), so that the rotary handle (112) can rotate within a range of 180 degrees.
3. A level sensor verification device according to claim 1, wherein: the mounting rod (402) is provided with a strip-shaped mounting hole (403), a magnet block (405), a lining plate (406) and a pointer (407) are mounted at any position in the mounting hole (403) from inside to outside, wherein the magnet block (405) and the lining plate (406) point to the liquid level meter, the magnet block (405) or the lining plate (406) is mounted according to actual needs, and the pointer (407) is mounted on the outermost side of the mounting rod (402) towards the direction of the scale plate and is fixed by a fixing bolt (404).
4. A level sensor verification device according to claim 1, wherein: a clamping groove (110) is formed at the joint of the topmost end of the box body left plate (104) and the movable plate (109), and the movable plate (109) and the box body left plate (104) are linked by a hinge (111) so as to be freely retracted and released; the middle part of the inner side of the movable plate (109) is provided with a second guide rail, and the front part of the movable plate (109) is provided with a second scale plate.
5. A level sensor verification device according to claim 1, wherein: the control box (2) is composed of a control panel (201), a front cover (202), a right cover (203) and a rear cover (204), an input end of a core controller (1301) is connected with an input module (1302), an output end of the core controller is connected with an output module (1303), a power supply end of the core controller is connected with a power supply module (1304), and the core controller (1301) is further connected with an A/D conversion module (1305) and further drives a sliding module (4) to move through a driver (1306).
6. A fluid level sensor verification apparatus as set forth in claim 5, wherein: the input module (1302) is connected with the input terminal (9), the control button (8) and the operation button (7), the input terminal (9) is used for being connected with an input signal line of the analog quantity and the switching value of the liquid level sensor, and the input terminal (9) is connected with the input module (1302) of the core controller (1301); the operation button (7) is used for controlling the operation mode of the liquid level sensor checking device and is divided into an automatic button and a manual button, the full-stroke movement back and forth can be automatically completed in the automatic control mode, and the starting, the pausing, the advancing and the retreating can be manually controlled by the control button (8) in the manual control mode; the control button (8) is provided with a start-stop key, a forward key and a backward key, only the start-stop key acts in an automatic mode, and the forward key, the start-stop key and the backward key can be operated in a manual mode.
7. The liquid level sensor verification method based on the liquid level sensor verification device according to claim 1, wherein the method comprises the following steps: the automatic mode comprises the following steps:
step (1), pressing an automatic button of an operation button (7) of a control panel (201), wherein the device is in an automatic operation mode;
after the start-stop key of a control button (8) of the control panel (201) is pressed, the received automatic mode and start signal enter a core controller (1301) through an input module (1302) to carry out processing logic, and then the sliding module (4) is driven to move through a driver (1306) after data processing of an A/D conversion module (1305), so that the device can automatically complete full-stroke movement from low position to high position and then to low position;
the floating ball of the liquid level meter is driven by the supporting plate (406) of the sliding module (4) to move together, and the permanent magnet steel at the upper end of the connecting rod connected with the floating ball moves up and down, so that the turning column in the magnetic turning plate is turned over through magnetic coupling, when the liquid level rises, the turning column is turned from white to red, when the liquid level falls, the turning column is turned from red to white, and the actual height of the liquid level of the medium in the container is at the red-white boundary position; meanwhile, the current and the liquid level signal of the liquid level meter are connected to a wiring terminal (9) through wires and then transmitted to a digital display meter (6) of a control panel (201) after passing through an output module (1303) of a core controller (1301), so that automatic tracking and display of the liquid level are realized, and verification of the analog quantity of the liquid level sensor is completed;
when the floating ball rises or descends along with the liquid level, a magnetic field generated in the floating ball drives an airtight magnetic reed switch in the rod to enable liquid level switches on two sides of a magnetic turning plate of the liquid level meter to act one by one, a signal wire of the liquid level switch is connected into a wiring terminal (9) through a wire, then the signal wire enters a core controller (1301) through an input module (1302) to process logic and then is output, and then the signal wire is output to an indicator lamp (5) on a control panel (201) through an output module (1303) to finish verification of the liquid level switch;
and (4) after the start and stop key of the control button (8) of the control panel (201) is pressed for the second time, stopping the operation of the sliding module (4) to stop the operation of the device.
8. The liquid level sensor verification method based on the liquid level sensor verification device according to claim 1, wherein the method comprises the following steps: the manual mode comprises the following steps:
step (1), pressing a manual button of an operation button (7) of a control panel (201), wherein the device is in a manual operation mode, and the verification device is operated according to the requirement to verify the liquid level sensor;
step (2), after a start-stop key of a control button (8) on a control panel (201) is pressed for the first time, the device is in a ready-to-move state;
after an operator presses a forward key of a control button (8), a supporting plate (406) of the sliding module (4) drives the floating ball to move upwards all the time, the sliding module (4) stops moving upwards after the current is high and limited, and the sliding module is kept at the highest position and buzzes and gives an alarm;
step (4), the voltmeter, the ammeter and the displacement of the digital display meter (6) on the control panel (201) are kept updated in real time, and the four indicator lamps of the indicator lamp (5) enable liquid level switches on two sides of the magnetic turning plate to act along with the movement of the floating ball to light the indicator lamp;
step (5), pressing a backward key of a control button (8) on the control panel (201) to enable the sliding module (4) to move downwards, enabling the floating ball of the liquid level meter to move downwards by the supporting plate (406), keeping the downward movement until the sliding module (4) can stop descending after the current is low and limit, keeping the lowest position and giving a buzzer alarm;
step (6), in the process, when an operator presses a start-stop key of the control button (8) for the second time, the sliding module (4) stops moving, and the operator can record relevant check data and observe the action condition of the liquid level switch;
in the manual verification process, an operator can repeat the process at any time, and the verification work of the analog quantity of the liquid level sensor and the switch can be manually completed.
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| CN110017885A (en) * | 2019-04-24 | 2019-07-16 | 中国长江电力股份有限公司 | A kind of roof-mounted magnetic double level gauge automatic check device and method |
| CN110579264A (en) * | 2019-08-30 | 2019-12-17 | 浙江正泰汽车科技有限公司 | Water level sensor detection system |
| CN110595581B (en) * | 2019-09-04 | 2021-01-22 | 格力电器（武汉）有限公司 | Automatic detection device and method for liquid level switch |
| CN110567535B (en) * | 2019-09-20 | 2020-10-23 | 长春工业大学 | Turning plate type triboelectric rotor flow meter |
| CN113188636A (en) * | 2021-04-14 | 2021-07-30 | 中国长江电力股份有限公司 | Automatic calibration device for magnetic turning plate liquid level meter and use method |
| CN115371775B (en) * | 2022-10-25 | 2023-01-03 | 山东明程石油设备有限公司 | Energy-saving explosion-proof LED light display remote transmission liquid level meter |
| CN117647349A (en) * | 2024-01-30 | 2024-03-05 | 三峡金沙江云川水电开发有限公司 | Hydropower station fluid pressure measuring device |
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