CN113819982B - Continuous calibration and calibration device for high-precision intelligent liquid level meter - Google Patents
Continuous calibration and calibration device for high-precision intelligent liquid level meter Download PDFInfo
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- CN113819982B CN113819982B CN202111407896.1A CN202111407896A CN113819982B CN 113819982 B CN113819982 B CN 113819982B CN 202111407896 A CN202111407896 A CN 202111407896A CN 113819982 B CN113819982 B CN 113819982B
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Abstract
According to the invention, a control system is designed to control a servo motor to drive a grating ruler to automatically move to indicate the liquid level, so that the traditional method for manually observing the standard liquid level height through a meter ruler is replaced, and the automatic calibration and the intelligent signal acquisition calculation of the liquid level meter are realized; the design has one set of water tank that can automatic control water pump intelligence moisturizing, the design of water tank lower extreme has a transparent person in charge, internally mounted has a high accuracy intelligence magnetostriction level gauge to be used for controlling the transparent liquid level height of being responsible for, it has the multiunit to be independently detected transparent cavity to connect in parallel through this transparent person in charge of linker principle, realize the level gauge of different measuring ranges and mark, set for calibration data through control system, automatic drive arrangement liquid level intelligence goes up and down, drive servo motor drives the grating chi simultaneously, realize automatic acquisition calibration data and calculate and have the inspection report, the effectual accuracy and the automation that have promoted the level gauge calibration data.
Description
Technical Field
The invention relates to the field of instruments and meters, in particular to a continuous calibration and calibration device for a high-precision intelligent liquid level meter.
Background
The liquid level measurement is an indispensable component in the field of industrial measurement, the accuracy of a liquid level meter seriously influences the aspects of production safety, particularly, an intelligent remote transmission type liquid level meter directly participates in the control of chemical and petrochemical production processes, if the measurement is inaccurate, the quality defect of a produced detected product is caused slightly, and serious accidents such as storage tank roof fall, reaction tank explosion and the like can happen seriously.
The liquid level meter is equivalent to eyes of people, particularly in the field of fine chemical engineering, and the detection and calibration of the accuracy of the liquid level meter are important for safe production and product quality.
The liquid level measuring and calibrating device is mainly used for detecting and correcting the accuracy of a detected instrument, the accuracy of the liquid level measuring and calibrating device greatly affects the actual measuring accuracy of the detected or corrected liquid level meter, if the accuracy of the liquid level measuring and calibrating device is not high, the calibrating device cannot improve the measuring accuracy of the detected liquid level meter, but can increase the deviation of the liquid level meter, and therefore the accuracy and the stability of the liquid level detecting device greatly affect the accuracy of the liquid level meter.
The traditional liquid level calibration device and the traditional liquid level calibration method have a plurality of defects, which are specifically shown as follows:
the utility model provides a, prior art can't realize automatic acquisition and operation mostly, and most liquid level calibration device degree of accuracy and intelligent degree are not high, adopt the mode of naked eye observation scale to read the liquid level mostly, and the steel ruler class is measured the biggest not enough and is lain in: the minimum scale of the conventional steel ruler scale is 1mm, the measurement precision of the conventional steel ruler scale is determined to be not too high, the scale distribution of the scale is denser, the measurement accuracy is higher, but the actual scale is not too dense, on one hand, too dense scale marks are difficult to process, and simultaneously, the naked eyes of people are not easy to distinguish, and the scale marks need to be counted at a short distance. Another disadvantage is that the observation direction cannot be completely looked at for different liquid level heights, and particularly, the liquid level is easy to look down when the liquid level is low, and the liquid level is looked up when the liquid level is high, so that the read liquid level value is inaccurate. For example, chinese patent CN205808519U adopts the measuring principle of the communicating vessel, records the liquid level by reading the scale of the steel ruler, and has low intelligence degree, and only can calibrate the float level meter, the detection product is single, and when the float level meter between different ranges is installed on the calibration device, the zero position of the float inside is different, so that the zero position of the float level meter needs to be re-determined according to the difference of the ranges each time.
For example, chinese patents CN210487023U and CN212621024U both adopt a steel scale calibration method, and have all the disadvantages of all steel scale calibration observation methods, such as inaccurate reading, incapability of implementing automatic data acquisition and operation, only manual recording and operation, incapability of implementing intelligent acquisition, and low precision.
Secondly, the calibration device of prior art can only measure single product mostly, can't accomplish generally, adopt the steel chi and can only mark the flotation pontoon like chinese patent CN20808519U, the mode of grating conversion dish has been adopted like chinese patent CN105987744A, the shape tooth's socket is corresponding with pulse digital converter, the mode motion through pulse control rectangle tooth's socket, its motion control error teaches greatly, the error of a rectangle tooth's socket usually, this scheme adopts the motion simulation liquid level variation of relative workstation of radar level gauge simultaneously, there is not actual liquid, so this principle can only measure and mark radar level gauge, can't mark other level gauges of calibration.
The existing calibration and calibration method further comprises a comparison method, the measurement accuracy of the comparison method is generally superior to that of a manual scale detection method, the accuracy of the liquid level meter used as a liquid level standard is generally high, but the measurement accuracy of the magnetostrictive liquid level meter with the highest accuracy is usually +/-1 mm when the magnetostrictive liquid level meter with the highest accuracy is calculated, and the improvement of the calibration accuracy of the liquid level meter by the comparison method is limited.
Fourthly, some intelligent calibration and measurement devices are also available in the market at present, for example, chinese patent CN207231603U, which proposes a mode of emitting laser by a handheld laser range finder to calibrate the liquid level measurement, and has the advantages of calibration and calibration on site, and relatively high intelligence, but it has many disadvantages, as described in the patent, "it needs to be noted that too rough surface of a float affects the measurement accuracy, too smooth surface of the float, and reflected light affects the normal operation of the laser range finder";
according to the technical scheme, the floater floats through the liquid level body in the storage tank, the floating position of the floater is limited through the telescopic pipe, but different media are ignored, the different densities can cause different heights of the floater submerged in the liquid, so that the distance from the laser range finder to the floater measured through the laser range finder is inaccurate, and the error caused by the part is not negligible; the technical scheme also has the problem that the verticality between the rotating disk and the horizontal plane needs to be adjusted repeatedly in the measuring process, the verticality has a critical influence on the measuring accuracy of the scheme, the labor time cost is increased invisibly, and the error is increased.
Fifthly, the prior art mostly cannot solve the problem of determining the zero positions of the liquid levels in different ranges, because the insertion depths of the liquid level meters in different ranges are different, when the liquid level meters are installed on the calibration device, a steel ruler is usually required to be used for measuring and calculating the corresponding zero position of the insertion depth of the detected liquid level meter outside, and a marking pen is used for calibrating, or the current scale position of the steel ruler is recorded as the zero point, and when the liquid levels in other positions are calibrated, the calibration device needs to be calculated with the marking position or the scale value corresponding to the zero point, so that the error is large, the workload is large, and the error is easy to make.
Sixth, the prior art mostly can not realize signal automatic acquisition, mostly adopts the mode that people's eye copied the scale, also can only calculate through manual calculation or manual input computer when calculating the error, and inefficiency and rate of accuracy are low.
Seventhly, the prior art mostly can not realize automatic control liquid level and goes up and down, can only pass through the mode of manual water injection, can not accurate control liquid level to appointed calibration point, can only be a small amount of frequent switch water pump and valve revise the liquid level height many times.
Eighth, prior art can't realize mostly that the scale is automatic along with the liquid level motion, so just need to go to compare with the steel chi every time, unless steel chi zero point is fixed, can't guarantee during every measurement whether zero point position is the same with before.
Ninth, the prior art does not consider the control problem of the calibration fluid and the fluctuation problem of the liquid level during the fluid calibration water injection process, and during the liquid level calibration process, the liquid level shaking of the fluid is too large, which not only affects the measurement precision, but also affects the detection calibration time period to be too long.
The density of the detection fluid is not considered in the prior art, and although water is used as the detection fluid in most of the detection fluids, the density of the water is different under different temperatures and pressures, so the density of the detection fluid needs to be corrected in order to improve the measurement accuracy.
Disclosure of Invention
The invention aims to overcome the defects of the traditional technology and provide the high-precision intelligent continuous calibration and calibration device for the liquid level meter, which is more intelligent, higher in precision and more convenient to operate.
The aim of the invention is achieved by the following technical measures: the utility model provides a calibrating device is markd in succession to high accuracy intelligence level gauge which characterized in that: comprises a detection device and an operation device, wherein the detection device comprises a frame, a water collecting tank is arranged in the frame, a water pump is fixedly arranged on one side of the water collecting tank, a workbench is fixedly arranged at the top of the frame, a vertical frame is fixedly arranged on the workbench, a top water tank is arranged at the top of the vertical frame, a plurality of water tank exhaust holes are formed in one side of the top water tank, a high-precision magnetostrictive liquid level meter, a remote liquid level meter and a temperature transmitter are arranged on the other side of the top water tank, a water inlet control valve is arranged at the bottom of the top water tank, the water inlet control valve is connected with a water inlet buffer tube, a transparent main tube is arranged on the part of the vertical frame between the top water tank and the workbench, one end of the transparent main tube, which is far away from the top water tank, is fixedly connected with a transparent main tube, and is connected with a branch control valve set, the branch control valves are connected with branch pipeline groups, the branch control valves are connected with main control valves, the main control valves are connected with the water collecting tank, the operating device comprises a control system and an upper computer workbench, an upper computer is arranged on the upper computer workbench, and the workbench is further provided with multiple groups of calibration branches.
As a preferred embodiment: multiunit calibration branch road includes branch road one, branch road one includes branch road a support frame, a branch road hyaline tube, a branch road servo motor, a branch road grating chi, a branch road connection fixed plate, a branch road instruction list, is examined instrument one and is examined instrument two, a branch road hyaline tube setting is in branch road a support frame, a branch road servo motor transmission is connected with a branch road servo motor drive slider, a branch road servo motor drive slider and a branch road connection fixed plate fixed connection, a branch road connection fixed plate fixedly connected with branch road grating chi contact, a branch road grating chi contact and a branch road instruction list fixed connection, it installs the top at a branch road support frame to examine instrument one.
As a preferred embodiment: the branch supporting frame comprises two electric telescopic rods, a fixing base, a branch lower connecting pipe, an instrument clamping lower bottom plate and an instrument clamping upper cover plate, the two electric telescopic rods are symmetrically arranged at two ends of the instrument clamping lower bottom plate and connected with the instrument clamping upper cover plate, and the fixing base is provided with a plurality of threaded holes.
As a preferred embodiment: the branch pipeline set comprises a first branch pipeline, a second branch pipeline, a third branch pipeline and a fourth branch pipeline, and the branch control valve set comprises a first branch control valve, a second branch control valve, a third branch control valve, a fourth branch control valve and a standby branch control valve.
As a preferred embodiment: the branch line I pipeline is connected with the branch line I control valve, the branch line II pipeline is connected with the branch line II control valve, the branch line III pipeline is connected with the branch line III control valve, the branch line IV pipeline is connected with the branch line IV control valve, and the standby branch control valve is connected with the main branch control valve.
As a preferred embodiment: the bottom of high accuracy magnetostrictive level meter runs through the top water tank and inserts and adorn in transparent main pipe, the buffer tube of intaking sets up in transparent main pipe, control system adopts automatic control systems such as PLC or singlechip, DCS to control, data acquisition and calculation, high accuracy magnetostrictive level meter, teletransmission level meter and temperature transmitter all are connected with control system electricity, the teletransmission level meter passes through control system and is connected with the water pump electricity.
Due to the adoption of the technical scheme, compared with the prior art, the hair dryer has the advantages that:
the invention discloses a high-precision intelligent liquid level meter continuous calibration device, which is mainly used for intelligent automatic liquid level meter calibration and is characterized in that: the calibration device is provided with a workbench, a water collecting tank is designed at the lower end of the workbench, a top water tank is arranged at the top end of the workbench, a water pump with a remote-transmission output liquid level meter for controlling the water collecting tank at the lower part is arranged in the top water tank to realize the automatic water replenishing function of the top water tank, a water inlet electromagnetic valve is arranged at the lower part of the top water tank and communicated to a transparent main pipe, a high-precision magnetostrictive liquid level meter is arranged in the transparent main pipe, an actual liquid level signal in the transparent pipe can be collected by the magnetostrictive liquid level meter to a control system, and the water inlet electromagnetic valve at the lower part of the top water tank and a water discharge electromagnetic valve at the lower end of the transparent main pipe are controlled to realize the automatic lifting and control of the liquid level;
the workbench is also simultaneously provided with a plurality of groups of independent transparent tubes which are connected with the transparent main tube in parallel, the liquid level in each group of independent tubes can be controlled to be consistent with that of the transparent main tube by the principle of a communicating vessel, and the independent transparent tubes and the transparent main tube in each group are connected and controlled by an electromagnetic valve, so that the liquid level switching in different calibration requirements can be realized;
a group of servo motors and grating rulers are arranged on the sides of each group of independent branch transparent tubes, before calibration, the servo motors are driven to the zero point of the liquid level meter in advance, signals acquired by the grating rulers and the servo motors at the point are automatically set as the zero point, the liquid level changes by a certain amount, the magnetostrictive liquid level meter can feed back to the control system to control the servo motors, the servo motors and the grating rulers are fixed and synchronously move, the automatic acquisition of liquid level signals is realized, the automatic calculation of liquid level change distance and the zero point signals acquired in advance are automatically operated through an upper computer of the control system, an inspection report is issued, and the full automation and the intellectualization of the whole liquid level calibration process are realized;
the measuring error that people's naked eye observation brought has effectively been reduced, in order to promote the accuracy, also can set up high accuracy weighing equipment under the branch road hyaline tube, calculates the liquid level through weighing the quality difference of calculating the liquid level height. The combined scheme of long pipe and pipe diameter optimization of the water injection pipe and control of the regulating valve is adopted, so that the liquid level fluctuation in the liquid level calibration process is smaller. Adopt electric telescopic handle clamping mode to be used for fixed mounting by the examination level gauge, the installation effectiveness is higher.
The invention is further described with reference to the following figures and detailed description.
Drawings
FIG. 1 is an isometric schematic view of a continuous calibration apparatus for a high-precision intelligent level gauge according to the present invention.
FIG. 2 is a front view of a continuous calibration device of a high-precision intelligent liquid level meter.
Fig. 3 is an enlarged schematic view of a in fig. 2.
Fig. 4 is a schematic diagram of the relative positions of the stand, top tank and main transparent pipe and related components of the present invention.
FIG. 5 is a top schematic view of the inventive top tank.
Fig. 6 is a schematic diagram of the structure of the bypass line set and the bypass control valve set and related components of the present invention.
Fig. 7 is a schematic structural view of a branch-and-support frame of the present invention.
Detailed Description
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Example (b): as shown in the accompanying drawings 1 to 7, a high-precision intelligent liquid level meter continuous calibration device comprises a detection device and an operation device, wherein the detection device comprises a frame 1, a water collecting tank 2 is arranged in the frame 1, a water pump 3 is fixedly arranged on one side of the water collecting tank 2, a workbench 4 is fixedly arranged on the top of the frame 1, a vertical frame 5 is fixedly arranged on the workbench 4, a top water tank 6 is arranged on the top of the vertical frame 5, a plurality of water tank exhaust holes 6-1 are formed in one side of the top water tank 6, a high-precision magnetostrictive liquid level meter 10, a remote transmission liquid level meter 12 and a temperature transmitter 13 are arranged on the other side of the top water tank 6, a water inlet valve 8 is arranged at the bottom of the top water tank 6, the water inlet control valve 8 is connected with a water inlet buffer tube 9, and a transparent main tube 7 is arranged on the part of the vertical frame 5 between the top water tank 6 and the workbench 4, transparent person in charge 7 keeps away from one end fixedly connected with transparent person in charge of top water tank 6 takes over 7-1 down, transparent person in charge takes over 7-1 down and is connected with branch control valves, branch control valves is connected with branch pipeline group, branch control valves is connected with main road control valve 27, main road control valve 27 is connected with header tank 2, operating means includes control system 14 and host computer workstation 16, be provided with host computer 15 on the host computer workstation 16, workstation 4 still is provided with the multiunit calibration branch road, is provided with the multiunit calibration branch road on workstation 4, applicable different range products.
The multiple calibration branches comprise a first branch, the embodiment only explains the principle by taking the first branch as an example, the working principle of the other calibration branches is the same as that of the first branch, the first branch comprises a first branch support frame 17, a first branch transparent tube 18, a first branch servo motor 19, a first branch grating ruler 20, a first branch connecting fixing plate 21, a first branch indicating meter 22, a first detected meter 23 and a second detected meter 24, the first branch transparent tube 18 is arranged in the first branch support frame 17, the first branch servo motor 19 is in transmission connection with a first branch servo motor driving slide block 19-1, the first branch servo motor driving slide block 19-1 is fixedly connected with the first branch connecting fixing plate 21, the first branch connecting fixing plate 21 is fixedly connected with a first branch grating ruler contact 20-1, the first branch grating ruler contact 20-1 is fixedly connected with the first branch indicating meter 22, the first tested instrument 23 is arranged on the top of a branch supporting frame 17.
The adoption high resolution grating chi of branch road one grating chi 20, branch road one servo motor 19 adopts high accuracy servo motor, and the manufacturer of branch road one servo motor 19 is chengdu reputation science and technology limited company in this embodiment, and specific model is: FSL40E1000-10C7, FSL40 open type lead screw module, the producer of branch one grating ruler 20 is Guiyang New sky photoelectricity science and technology Limited company, and the concrete model is: JCXE-24F, each group of branch road all adopts high accuracy grating ruler 20 and high accuracy servo motor 19 to replace traditional steel meter chi.
The branch supporting frame 17 comprises electric telescopic rods 17-1, a fixed base 17-2, a branch lower connecting pipe 17-3, an instrument clamping lower bottom plate 17-4 and an instrument clamping upper cover plate 17-5, the number of the electric telescopic rods 17-1 is two, the two electric telescopic rods 17-1 are symmetrically arranged at two ends of the instrument clamping lower bottom plate 17-4, the two electric telescopic rods 17-1 are connected with the instrument clamping upper cover plate 17-5, and the fixed base 17-2 is provided with a plurality of threaded holes.
The branch pipeline set comprises a branch one pipeline 25-1, a branch two pipeline 25-2, a branch three pipeline 25-3 and a branch four pipeline 25-4, and the branch control valve set comprises a branch one control valve 26-1, a branch two control valve 26-2, a branch three control valve 26-3, a branch four control valve 26-4 and a standby branch control valve 26-5.
The first branch pipeline 25-1 is connected with the first branch control valve 26-1, the second branch pipeline 25-2 is connected with the second branch control valve 26-2, the third branch pipeline 25-3 is connected with the third branch control valve 26-3, the fourth branch pipeline 25-4 is connected with the fourth branch control valve 26-4, and the standby branch control valve 26-5 is connected with the main branch control valve 27.
The bottom of the high-precision magnetostrictive liquid level meter 10 penetrates through the top water tank 6 and is inserted into the transparent main pipe 7, the water inlet buffer pipe 9 is arranged in the transparent main pipe 7, the control system 14 adopts automatic control systems such as a PLC (programmable logic controller) or a single chip microcomputer and a DCS (distributed control system) to carry out control, data acquisition and calculation, the high-precision magnetostrictive liquid level meter 10, the remote-transmission liquid level meter 12 and the temperature transmitter 13 are all electrically connected with the control system 14, and the remote-transmission liquid level meter 12 is electrically connected with the water pump 3 through the control system 14.
The working principle of the invention is as follows: install header tank 2 in the frame 1, the top installation workstation 4 of frame 1, install grudging post 5 on the workstation 4, top water tank 6 has been placed at the top of grudging post 5, and top one side of top water tank 6 is provided with a plurality of water tank exhaust hole 6-1, the top opposite side fixed mounting of top water tank 6 has high accuracy magnetostrictive level meter 10, teletransmission level meter 12 and temperature transmitter 13, teletransmission level meter 12 collects the water level signal in the top water tank 6 to with water level signal transmission to control system 14, control system 14 controls opening and stopping of water pump 3 through the water level signal of teletransmission level meter 12 transmission, and water pump 3 carries the water in the header tank 2 in top water tank 6 through water-feeding pipe 11.
The top water tank 6 lower part is provided with into water control valve 8, it is connected with into water buffer tube 9 to advance water control valve 8, it sets up in transparent person in charge 7 to advance water buffer tube 9, and high accuracy magnetostrictive liquid level gauge 10 has measurement function's part also to set up in transparent person in charge 7 simultaneously, the accessible high accuracy magnetostrictive liquid level gauge 10 gathers transparent person in charge 7 interior actual liquid level signal to control system 14, advances water control valve 8 and main road control valve 27 and realizes the automatic rising and the control of liquid level.
The workbench 4 can also be simultaneously provided with a plurality of groups of independent branch transparent tubes which are connected in parallel with the transparent main tube 7, for example, the branch transparent tube 18 is connected in parallel with the transparent main tube 7, and the branch transparent tubes of each group can be controlled by the principle of a communicating vessel, if the liquid level inside the branch transparent tube 18 is consistent with the transparent main tube 7, the branch control valve group 25 and the branch control valve group 26 are respectively connected and controlled with the transparent main tube 7, so that the liquid level switching of different products and measuring range time scale requirements can be realized.
In order to control the stability of the water adding process and reduce the liquid level fluctuation, a mode of arranging a top water tank 6 at a certain height is adopted, water flows upwards from the bottom by adopting a water inlet buffer tube 9 extending to the bottom of a transparent main pipe 7 under the action of the self gravity of the water in the water tank, a water head is controlled in the bottom water, the liquid level fluctuation in the water injecting process can be effectively reduced, meanwhile, a plurality of water tank exhaust holes 6-1 are arranged on the upper portion of the top water tank 6 to constantly balance the pressure difference in the water tank, and the fluctuation is reduced.
In order to improve the measurement accuracy, a temperature transmitter 13 and a high-accuracy magnetostrictive liquid level meter 10 are installed on the upper portion of the top water tank 6, collected signals are transmitted to an upper computer 15 through a control system 14, the density of water used for current detection is calculated, and the calibration error caused by different densities of water with different temperatures and pressures is corrected, particularly the magnetic flip plate liquid level meter, the floating ball liquid level meter, the magnetostrictive liquid level meter, the intelligent buoy liquid level meter and the like aiming at the buoyancy measurement principle.
The water inlet control valve 8 and the main path control valve 27 are electric control valves, and the speed and the control precision of the liquid level calibration process can be controlled by adjusting and controlling the valve opening of the control valves, and if the measurement precision and the stability are improved, the opening of the control valves is usually reduced.
The branch-circuit transparent tube 18 is fixed inside a branch-circuit supporting frame 17, the branch-circuit transparent tube 18 can be observed by the branch-circuit supporting frame 17 from four directions, a fixing base 17-2 is arranged at the bottom of the branch-circuit supporting frame 17, and the branch-circuit supporting frame 17 is fixedly connected to the workbench 4 through a threaded hole in the branch-circuit fixing base 17-2.
An instrument clamping lower bottom plate 17-4 is arranged at the top end of the branch supporting frame 17, a group of electric shrinkage rods 17-1 are arranged on the instrument clamping lower bottom plate 17-4, and the tops of the expansion rods of the electric shrinkage rods 17-1 are fixedly connected with instrument clamping upper covers 17-5 through bolts. The first instrument 23 to be tested is clamped and disassembled by controlling the telescopic distance of the electric telescopic rod 17-1 to drive the instrument clamping upper cover 17-5.
In order to conveniently adjust the zero position and observe the accuracy of the liquid level, a branch-circuit-indicating pointer 22 is arranged on the branch-circuit-grating-ruler contact 20-1, so that the stability of the actual water level judgment control system can be conveniently observed in an auxiliary mode.
When the upper computer 15 sends a liquid level change instruction to the control system 14, the branch-circuit-servo motor driving slider 19-1 drives the branch-circuit-grating ruler contact 20-1 and the branch-circuit-indicating pointer 22 to automatically move to a specified liquid level height position, meanwhile, the control system 14 can automatically calculate the numerical value after liquid level adjustment through the 4-20mA analog current signal of the high-precision magnetostrictive liquid level meter 10 and control the water inlet control valve 8 to add water or the main path control valve 27 to discharge water to the specified height, and because the precision of the grating ruler is superior to 0.005mm, the position signal acquired through the grating ruler contact is much higher than the precision of a conventional steel ruler, and the problem of indicating value error caused by the angle observed by naked eyes of people is also avoided.
For example, when calibrating the first instrument 23 to be tested on the first branch, the control system 14 drives the first branch-servo motor driving slider 19-1 on the first branch-servo motor 19 to drive the first branch-grating ruler contact 20-1 and the first branch-indicating pointer 22 on the first branch-grating ruler 20 to move to the zero point of the liquid level meter, and automatically sets the signals collected by the first branch-grating ruler 20 and the first branch-servo motor 19 to the zero point, so that the liquid level changes, the high-precision magnetostrictive liquid level meter 10 feeds back to the control system 14 to control the first branch-servo motor driving slider 19-1 to drive the first branch-grating ruler contact 20-1 to move for a designated distance, and feeds back the moving distance to the host computer 15 through the control system 14, so as to realize automatic collection of liquid level signals, and the host computer 15 automatically calculates multi-point position liquid level signals collected each time and issues a test report, the automation and the intellectualization of the whole liquid level calibration process are realized.
All control modes complete automatic control instructions through an upper computer 15 and a control system 14, and all control valves adopt electric regulating valves or electric electromagnetic valves.
For example, when calibrating the first branch, if water is to be supplied, the first branch control valve 26-1 is opened, the main branch control valve 27 is closed, the second branch control valve 26-2 is closed, the third branch control valve 26-3 is closed, the fourth branch control valve 26-4 is closed, the standby branch control valve 26-5 is closed, the water inlet control valve 8 is opened, and the liquid levels of the first branch, the transparent pipe 18 and the transparent main pipe 7 corresponding to the first branch rise due to the principle that the water inlet control valve 8 opens the water filling connector.
When the water needs to be lowered, the water inlet control valve 8 is automatically closed, the main path control valve 27 is automatically opened, and the water in the branch transparent pipe and the water in the transparent main pipe 7 flow into the bottom water collecting tank 2 through the opening of the main path control valve 27 to realize the liquid level lowering.
When the high-precision magnetostrictive liquid level meter 10 in the transparent main pipe 7 senses the liquid level change, a signal is sent to the upper computer 15 in real time, and when the upper computer 15 calculates that the liquid level rises or falls to a specified position, the water inlet control valve 8 or the main control valve 27 can be automatically switched to realize the automatic liquid level control.
Claims (4)
1. The utility model provides a calibrating device is markd in succession to high accuracy intelligence level gauge which characterized in that: including detection device and operating means, detection device includes frame (1), be provided with header tank (2) in frame (1), header tank (2) one side fixed mounting has water pump (3), frame (1) top fixed mounting has workstation (4), workstation (4) fixed mounting has grudging post (5), grudging post (5) top is provided with top water tank (6), top water tank (6) top one side is provided with a plurality of water tank exhaust hole (6-1), high accuracy magnetostrictive level gauge (10), teletransmission level gauge (12) and temperature transmitter (13) are installed to top water tank (6) top opposite side, water inlet control valve (8) are installed to top water tank (6) bottom, water inlet control valve (8) are connected with into water buffer tube (9), the part that grudging post (5) are located between top water tank (6) and workstation (4) is provided with transparent person in charge (7) One end, far away from the top water tank (6), of the transparent main pipe (7) is fixedly connected with a transparent main pipe lower connection pipe (7-1), the transparent main pipe lower connection pipe (7-1) is connected with a branch control valve group, the branch control valve group is connected with a branch pipe group, the branch control valve group is connected with a main circuit control valve (27), the main circuit control valve (27) is connected with the water collection tank (2), the operating device comprises a control system (14) and an upper computer workbench (16), an upper computer (15) is arranged on the upper computer workbench (16), and the workbench (4) is further provided with a plurality of groups of calibration branch circuits;
the multi-group calibration branch comprises a first branch, the first branch comprises a first branch support frame (17), a first branch transparent tube (18), a first branch servo motor (19), a first branch grating ruler (20), a first branch connection fixing plate (21), a first branch indicating meter (22), a first detected meter (23) and a second detected meter (24), the first branch transparent tube (18) is arranged in the first branch support frame (17), the first branch servo motor (19) is in transmission connection with a first branch servo motor driving slider (19-1), the first branch servo motor driving slider (19-1) is fixedly connected with the first branch connection fixing plate (21), the first branch connection fixing plate (21) is fixedly connected with a first branch grating ruler contact (20-1), and the first branch grating ruler contact (20-1) is fixedly connected with the first branch indicating meter (22), the first detected instrument (23) is arranged at the top of a branch supporting frame (17);
the branch supporting frame (17) comprises electric telescopic rods (17-1), a fixed base (17-2), a branch lower connecting pipe (17-3), an instrument clamping lower bottom plate (17-4) and an instrument clamping upper cover plate (17-5), the number of the electric telescopic rods (17-1) is two, the two electric telescopic rods (17-1) are symmetrically arranged at two ends of the instrument clamping lower bottom plate (17-4), the two electric telescopic rods (17-1) are connected with the instrument clamping upper cover plate (17-5), and the fixed base (17-2) is provided with a plurality of threaded holes.
2. The continuous calibration and calibration device for the high-precision intelligent liquid level meter according to claim 1, wherein: the branch pipeline set comprises a branch one pipeline (25-1), a branch two pipeline (25-2), a branch three pipeline (25-3) and a branch four pipeline (25-4), and the branch control valve set comprises a branch one control valve (26-1), a branch two control valve (26-2), a branch three control valve (26-3), a branch four control valve (26-4) and a standby branch control valve (26-5).
3. The continuous calibration and calibration device for the high-precision intelligent liquid level meter according to claim 2, wherein: the branch one pipeline (25-1) is connected with the branch one control valve (26-1), the branch two pipeline (25-2) is connected with the branch two control valve (26-2), the branch three pipeline (25-3) is connected with the branch three control valve (26-3), the branch four pipeline (25-4) is connected with the branch four control valve (26-4), and the standby branch control valve (26-5) is connected with the main control valve (27).
4. The continuous calibration and calibration device for the high-precision intelligent liquid level meter according to claim 1, wherein: the high-precision magnetostrictive liquid level meter is characterized in that the bottom of the high-precision magnetostrictive liquid level meter (10) penetrates through the top water tank (6) and is inserted in the transparent main pipe (7), the water inlet buffer pipe (9) is arranged in the transparent main pipe (7), the control system (14) adopts a PLC (programmable logic controller) or a single chip microcomputer or a DCS (distributed control system) to perform control, data acquisition and calculation, the high-precision magnetostrictive liquid level meter (10), the remote liquid level meter (12) and the temperature transmitter (13) are all electrically connected with the control system (14), and the remote liquid level meter (12) is electrically connected with the water pump (3) through the control system (14).
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