CN103499373A - Automobile oil tank truck capacity automatic inspection device with self-calibration function and inspection method - Google Patents

Automobile oil tank truck capacity automatic inspection device with self-calibration function and inspection method Download PDF

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Publication number
CN103499373A
CN103499373A CN201310463960.7A CN201310463960A CN103499373A CN 103499373 A CN103499373 A CN 103499373A CN 201310463960 A CN201310463960 A CN 201310463960A CN 103499373 A CN103499373 A CN 103499373A
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switch valve
standard scale
outlet
standard
entrance
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CN201310463960.7A
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CN103499373B (en
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孙斌
赵江萍
赵玉晓
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China Jiliang University
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China Jiliang University
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Abstract

The invention relates to an automobile oil tank truck capacity automatic inspection device with a self-calibration function and inspection method. The device comprises a water pump, a pressure stabilizing tank, a regulating valve, a first switch valve, a second switch valve, a third switch valve, a first standard meter, a second standard meter, a third standard meter, a piston-type standard volume pipe, a fourth switch valve, a fifth switch valve, a sixth switch valve and a circulating water pond and further comprises a liquid level transmitter and a temperature transmitter, wherein the liquid level transmitter and the temperature transmitter are arranged in an automobile oil tank truck. According to the device and method, automatic reading of flow signals, liquid level signals, temperature signals and other signals and automatic processing of data are achieved, storage of capacity inspection results and printing of tables are achieved, self-calibration of a standard flow meter can be achieved, accuracy and reliability of quantity transmission are guaranteed, automation of the inspection process is achieved, manual errors are reduced, and inspection efficiency and accuracy of the device are improved.

Description

Be with self-alignment automatic capacity calibration device for tank truck and method
Technical field
The invention belongs to the test technique automatic field, relate to a kind of self-alignment automatic capacity calibration device for tank truck and calibration method be with.
Background technology
Automobile oil truck is the special car of transport liquid petroleum and chemical industry product etc., is the important tool of shipment lightweight oil.Oil tank after calibrating can be used as measurement instrument for oil product transaction, trade settlement, belongs to the utensil project that records of state compulsion calibrating.In recent years, along with the outburst of energy crisis, the rising steadily of crude oil price, the accurate measurement of automobile oil truck capacity has also caused concern and the attention that people are general.According to JJG133-2005 " automobile oil truck capacity vertification regulation ", the method that the automobile oil truck capacity is examined and determine has capacity relative method and flowmeter method.Wherein the capacity relative method adopts standard capacity measure to the measurement of comparing of the volume of automobile oil truck, thereby draws the volume of tank wagon.And the flowmeter method adopts fixed point to use to be repetition rate to be not less than 0.05% flowmeter as standard scale, by calculating by the integrated flux of standard scale, thereby determine the volume of tank wagon.
From existing automobile oil truck capacity calibrating installation, capacity relative method and flowmeter method have use.But volume ratio adopts manually-operated than fado, workload is large, inefficiency, and the existence of human factor also makes the reliability of verification result be difficult to guarantee.The flowmeter method is as a kind of high efficiency calibration method, and the tank wagon calibrating for actual, improved work efficiency, reduced labour intensity.
Mainly there is following problem in existing flowmeter method automobile oil truck capacity calibrating installation:
1. calibrating efficiency is not high: owing to adopting a flowmeter as standard scale, when the standard scale fixed point is used, discharge is not often very large, and the time of water filling is longer, and the efficiency that makes calibrating is not very high.
2. the correctness of standard scale is difficult for finding: standard scale in use, when it goes wrong, owing to there not being checking mechanism, can't be found the problem that standard scale exists timely, causes verification result to have wrong risk.
3. the maintenance of standard scale is loaded down with trivial details: according to vertification regulation, need to carry out regular calibrating to standard scale, dismounting and the censorship of standard scale are cumbersome, affect progress and the benefit of actual production calibrating.
4. labour intensity is large: artificial discharge water, reading, labour intensity is larger, and easily introduces personal error.
Summary of the invention
The present invention is directed to the technical deficiency of existing apparatus, a kind of self-alignment automatic capacity calibration device for tank truck and calibration method be with is provided.
Be with self-alignment automatic capacity calibration device for tank truck, comprise water pump, buffer tank, variable valve, the first switch valve, second switch valve, the 3rd switch valve, the first standard scale, the second standard scale, the 3rd standard scale, piston type standard volume pipe, the 4th switch valve, the 5th switch valve, the 6th switch valve and circulating water pool, and fluid level transmitter and temperature transmitter in automobile oil truck.
Water pump is communicated with circulating water pool by pipeline, the outlet of water pump is connected with the entrance of buffer tank, the outlet of buffer tank is connected with the entrance of variable valve, the outlet of variable valve is connected with the entrance that pipeline is measured in calibrating, the outlet that pipeline is measured in calibrating has two branch roads, one tunnel is standard scale calibration branch road, and another branch road is connected with tank wagon by the 6th switch valve successively, and fluid level transmitter and temperature transmitter also are installed in described tank wagon.
Described calibrating measuring tube route the first switch valve, second switch valve, the 3rd switch valve, the first standard scale, the second standard scale and the 3rd standard scale form, and the entrance of the first switch valve and second switch valve interconnects, and form the entrance that pipeline is measured in calibrating.The outlet of the first switch valve is connected with the entrance of the first standard scale, and the outlet of second switch valve is connected with the entrance of the 3rd standard scale with the second standard scale, and the outlet of the first standard scale and the second standard scale is connected with the entrance of the 3rd switch valve.The outlet of the 3rd switch valve is connected with the outlet of the 3rd standard scale, forms the outlet that pipeline is measured in calibrating.
Be disposed with the 4th switch valve, piston type standard volume pipe, the 5th switch valve on described standard scale calibration branch road.The entrance of the 4th switch valve is connected with the outlet that pipeline is measured in calibrating, the outlet of the 4th switch valve is connected with the entrance of piston type standard volume pipe, the outlet of piston type standard volume pipe is connected with the entrance of the 5th switch valve, and the outlet of the 5th switch valve is connected with circulating water pool.
Utilize above-mentioned method of being examined and determine with self-alignment automatic capacity calibration device for tank truck:
After starting water pump, the liquid in circulating water pool obtains the fluid of steady pressure after buffer tank; By PLC regulating and controlling valve opening to obtain suitable flow; Control the opening and closing of the first switch valve, second switch valve and the 3rd switch valve by PLC, can make the first standard scale, the second standard scale and the 3rd standard scale with single only, the mode of two parallel connections, three parallel connections or three series connection accesses calibrating and measures in pipeline and use, wherein the second standard scale adopts flowmeter that can forward and reverse measurement; Temperature transmitter, fluid level transmitter gather the required data of calibrating in road tanker.The standard scale situation of specifically selecting is that when the first switch valve unlatching, second switch valve and the 3rd switch valve are closed, the first standard scale, the second standard scale and the 3rd standard scale series connection use; When the first switch valve, second switch valve and the 3rd switch valve are all opened, the first standard scale, the second standard scale and the 3rd standard scale are in parallel to be used; When the first switch valve and the unlatching of the 3rd switch valve, the second switch valve cuts out, and only uses the first standard scale; When the first switch valve cuts out, second switch valve and the 3rd switch valve open, the second standard scale and the 3rd standard scale are in parallel to be used.
Utilize above-mentioned method of carrying out the standard scale calibration with self-alignment automatic capacity calibration device for tank truck:
Controlling the first switch valve by PLC opens, second switch valve and the 3rd switch valve are closed, make the first standard scale, the second standard scale and the 3rd standard scale in series connection, control the 6th switch valve cuts out by PLC, liquid flows into piston type standard volume pipe by the 4th switch valve, thereby standard scale is calibrated.After having examined and determine, the liquid in piston type standard volume pipe flows into circulating water pool by the 5th switch valve.
The present invention can carry out self calibration to proving flowmeter, has guaranteed that transmission of quantity value accurately and reliably.Verification process is realized robotization, has reduced personal error, has improved the accuracy of calibrating efficiency and device.
The accompanying drawing explanation
Fig. 1 is apparatus structure schematic diagram in the present invention.
Fig. 2 is each power unit connection diagram in the present invention.
Fig. 3 is calibration function process flow diagram of the present invention.
In Fig. 1: 1, water pump, 2, buffer tank, 3, variable valve, 4-1, the first switch valve, 4-2, second switch valve, 4-3, the 3rd switch valve, 5-1, the first standard scale, 5-2, the second standard scale, 5-3, the 3rd standard scale, 6, piston type standard volume pipe, 7-1, the 4th switch valve, 7-2, the 5th switch valve, 8, the 6th switch valve, 9, tested road tanker, 10, fluid level transmitter, 11, temperature transmitter, 12, circulating water pool.
Embodiment
As shown in Figure 1, water pump 1 draws water from circulating water pool 12 by pipeline, and liquid advanced the liquid of the rear acquisition pressure stability of buffer tank 2.According to the needs of measuring, the aperture by PLC regulating and controlling valve 3, obtain suitable uninterrupted.When the calibrating of this system in reading road tanker, during the stage, PLC control the 4th switch valve 7-1 closes, the 6th switch valve 8 is opened.In verification process, required flow hour, control the first switch valve 4-1 and the 3rd switch valve 4-3 unlatching by PLC, second switch valve 4-2 closes, and at this moment only uses the first standard scale 5-1, also can control the first switch valve 4-1 and open, second switch valve 4-2 and the 3rd switch valve 4-3 close, the first standard scale 5-1, the second standard scale 5-2 and the 3rd standard scale 5-3 series connection is used, at this moment between three standard scales, also there is the effect of comparison, improved the confidence level of measurement data; When required flow is moderate, by PLC control that the first switch valve 4-1 closes, second switch valve 4-2 and the 3rd switch valve 4-3 open, now the second standard scale 5-2 and the 3rd standard scale 5-3 are in parallel uses; When required fluid flow is larger, control the first switch valve 4-1, second switch valve 4-2 and the 3rd switch valve 4-3 opens, make that the first standard scale 5-1, the second standard scale 5-2 and the 3rd standard scale 5-3 are in parallel to be used.In verification process, the level value gathered in oil tank by fluid level transmitter 10, measure temperature value by temperature transmitter 11, obtains the required experimental data of calibrating, completes the calibrating to the tank wagon volume.
When this system need to be carried out self calibration to standard scale, by PLC gauge tap valve, the 4th switch valve 7-1 unlatching, the 6th switch valve 8 are closed, control the first switch valve 4-1 opens simultaneously, second switch valve 4-2 and the 3rd switch valve 4-3 close, and make the first standard scale 5-1, the second standard scale 5-2 and the 3rd standard scale 5-3 in series connection.Liquid enters piston type standard volume pipe 6 after by three standard scales, thereby completes the calibration to standard scale.Calibration is opened the 5th switch valve 7-5 after finishing, and the liquid in piston type standard volume pipe 6 is entered to circulating water pool 12.
In the present embodiment, the specifications and models of three standard scales are identical, are the flowmeter that can carry out positive and negative measurement.
As shown in Figure 2, with self-alignment automobile oil truck capacity automatic verification system adopt PC as host computer, PLC the form as slave computer, guaranteed like this real-time and the reliability of data acquisition and control.PLC adopts the S7-200 Programmable Logic Controller of Siemens S7 series, by the RS-485 communication port, with computing machine, is connected, and adopts and supports PPI or MPI communication protocol to communicate.The model that CPU selects is CPU 224XP CN, this CPU has 14 digital quantity input points and 10 digital quantity output points, 2 tunnel analog inputs and the simulation output of 1 tunnel are provided, No. 6 high-speed counters (the single-phase high-speed counter of 4 road 30kHz and 2 road 200kHz bidirectional high speed counters), user data (as zone bit state, data block, timer, counter) can be stored about 5 days by inner super capacitor.The operation data type of S7-200 PLC can be position, byte, word or double word, and IEC 1131-3 instruction set is arranged in main frame, and multiple different application protocol is provided.This controller can be expanded maximum 7 modules in addition, comprises that 168 digital quantities are counted and 38 analog quantitys are counted.2 road RS-485 communication interfaces can communicate with other equipment, comprise host computer and other controllers.
In this system, the main data that gather have temperature signal, liquid level signal and flow signal, and these signals are the 4-20mA signal of standard, and these input signals are gathered by the growth simulation amount load module EM231 of S7-200 PLC.This module has 12 bit resolutions, and resolution is 5 μ A, and the maximum conversion time is 250 μ s.The direct current 24V power supply that this module provides with field apparatus is powered, and has 4 groups of analog input channels.Analog input module is measured range by configuration switch DIP to it and is arranged.These parameters can meet the needs of system actual acquisition experimental data.
In this system, need to control variable valve and switch valve.Control to switch valve is mainly controlled by switching value, by the I/O mouth relay output of S7-200, is controlled, and 220V AC isolates output, reaches the purpose of gauge tap valve opening and closing.For variable valve, to be undertaken by the 4-20mA electric current, equipment 4-20mA output signal in service is exported by the growth simulation amount output module EM232 of S7-200 PLC, photoelectrical coupler in module separates interior external circuit, prevents that the external electromagnetic interference signal from causing interference to the PLC internal circuit.This module is direct current 24V Power supply, has 2 groups of analog output channels, and the time of electric current output is 2ms.
As shown in Figure 3, be automobile oil truck capacity calibrating function and self-correcting function realization flow figure.Open login system by local PC, after username and password is proved to be successful, can enter the assay calibration function pages, otherwise can't normally enter the assay calibration interface.
After logging in successfully, at first select to the calibration of standard scale or to the calibrating of tank wagon.Wherein the calibration of standard scale all realized automatically, finally provide the calibration result of standard scale.When standard scale has problems, program can finish automatically, can not proceed calibrating, needs termination routine to be checked standard scale.
After selecting the tank wagon volume calibration, need to be selected the marked capacity of road tanker, then the use of standard scale be selected, can be single only, any one forms of two parallel connections, three parallel connections or three series connection.Also to be arranged the setting of data acquisition channel, measurement range selection and sensor parameters etc. simultaneously, and can be imported and exported configuration file.
After completing relevant parameter and arranging, can select to examine and determine the realization manually or automatically of function.
Manually verification process is, manually input capacity is examined and determine point, PLC regulating and controlling valve opening after starting, reach flow setting value, start being examined and determine by oil skimming tank after stable, gather the correlate meter data, and show in real time data and the curves such as liquid level, temperature, flow, after this point has been calibrated, start the calibrating of next calibrating point.Repeat above process to all calibrating points and complete calibrating.
The automatic Verification process is that, according to tested oil tank volume and the vertification regulation selected, system, by Lookup protocol capacity calibrating point, starts rear program and will complete according to the step of vertification regulation whole verification process.
Can select generation, storage, printing reports and capacities chart after having examined and determine, and select again examine and determine or quit a program.Before quitting a program, system just switches off the pump and respective valves.

Claims (3)

1. be with self-alignment automatic capacity calibration device for tank truck, comprise water pump, buffer tank, variable valve, the first switch valve, second switch valve, the 3rd switch valve, the first standard scale, the second standard scale, the 3rd standard scale, piston type standard volume pipe, the 4th switch valve, the 5th switch valve, the 6th switch valve and circulating water pool, and fluid level transmitter and temperature transmitter in automobile oil truck, it is characterized in that:
Water pump is communicated with circulating water pool by pipeline, the outlet of water pump is connected with the entrance of buffer tank, the outlet of buffer tank is connected with the entrance of variable valve, the outlet of variable valve is connected with the entrance that pipeline is measured in calibrating, the outlet that pipeline is measured in calibrating has two branch roads, one tunnel is standard scale calibration branch road, and another branch road is connected with tank wagon by the 6th switch valve successively, and fluid level transmitter and temperature transmitter also are installed in described tank wagon;
Described calibrating measuring tube route the first switch valve, second switch valve, the 3rd switch valve, the first standard scale, the second standard scale and the 3rd standard scale form, and the entrance of the first switch valve and second switch valve interconnects, and form the entrance that pipeline is measured in calibrating; The outlet of the first switch valve is connected with the entrance of the first standard scale, and the outlet of second switch valve is connected with the entrance of the 3rd standard scale with the second standard scale, and the outlet of the first standard scale and the second standard scale is connected with the entrance of the 3rd switch valve; The outlet of the 3rd switch valve is connected with the outlet of the 3rd standard scale, forms the outlet that pipeline is measured in calibrating;
Be disposed with the 4th switch valve, piston type standard volume pipe, the 5th switch valve on described standard scale calibration branch road; The entrance of the 4th switch valve is connected with the outlet that pipeline is measured in calibrating, the outlet of the 4th switch valve is connected with the entrance of piston type standard volume pipe, the outlet of piston type standard volume pipe is connected with the entrance of the 5th switch valve, and the outlet of the 5th switch valve is connected with circulating water pool.
2. the method for utilizing device claimed in claim 1 to be examined and determine, its specific features is:
After starting water pump, the liquid in circulating water pool obtains the fluid of steady pressure after buffer tank; By PLC regulating and controlling valve opening to obtain suitable flow; Control the opening and closing of the first switch valve, second switch valve and the 3rd switch valve by PLC, can make the first standard scale, the second standard scale and the 3rd standard scale with single only, the mode of two parallel connections, three parallel connections or three series connection accesses calibrating and measures in pipeline and use, wherein the second standard scale adopts flowmeter that can forward and reverse measurement; Temperature transmitter, fluid level transmitter gather the required data of calibrating in road tanker.
3. method according to claim 2 is characterized in that:
Controlling the first switch valve by PLC opens, second switch valve and the 3rd switch valve are closed, make the first standard scale, the second standard scale and the 3rd standard scale in series connection, control the 6th switch valve cuts out by PLC, liquid flows into piston type standard volume pipe by the 4th switch valve, thereby standard scale is calibrated, and the liquid in piston type standard volume pipe flows into circulating water pool by the 5th switch valve.
CN201310463960.7A 2013-09-30 2013-09-30 Be with self-alignment automatic capacity calibration device for tank truck and method Active CN103499373B (en)

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104359521A (en) * 2014-11-15 2015-02-18 北京航天计量测试技术研究所 Large-capacity storage tank volume detection system and calibration method
CN106556430A (en) * 2016-10-17 2017-04-05 金卡高科技股份有限公司 A kind of gas Actual flow test system and method with self-calibration function
CN107421598A (en) * 2017-06-21 2017-12-01 华南农业大学 A kind of liquid measure monitoring device and monitoring method
CN109459553A (en) * 2019-01-07 2019-03-12 陈立峰 A kind of water quality monitoring pick up calibration liquid recycling method and system
CN109708728A (en) * 2018-12-11 2019-05-03 广州能源检测研究院 A kind of movable type mass flowmenter on-line calibration device and method
CN110793601A (en) * 2019-11-29 2020-02-14 三一汽车制造有限公司 Method for calibrating level indicator, level indicator and asphalt station
CN110895202A (en) * 2018-09-12 2020-03-20 北京振兴计量测试研究所 Test device for researching influence of environmental factors on flow measurement

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CN201852622U (en) * 2010-11-09 2011-06-01 南京市计量监督检测院 Automatic capacity calibration device for tank truck
CN103267559A (en) * 2013-05-16 2013-08-28 中国计量学院 Automatic volume verification method and device for oil tank truck
CN203534660U (en) * 2013-09-30 2014-04-09 中国计量学院 Self-calibrated automatic volume calibrating device for oil tank truck

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CN102042856A (en) * 2009-10-16 2011-05-04 中国计量科学研究院 Device and method for automatically metering and calibrating horizontal tank capacity based on standard metal tank
CN201852622U (en) * 2010-11-09 2011-06-01 南京市计量监督检测院 Automatic capacity calibration device for tank truck
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Cited By (10)

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Publication number Priority date Publication date Assignee Title
CN104359521A (en) * 2014-11-15 2015-02-18 北京航天计量测试技术研究所 Large-capacity storage tank volume detection system and calibration method
CN104359521B (en) * 2014-11-15 2017-11-28 北京航天计量测试技术研究所 A kind of Large Copacity tank volume detecting system and scaling method
CN106556430A (en) * 2016-10-17 2017-04-05 金卡高科技股份有限公司 A kind of gas Actual flow test system and method with self-calibration function
CN107421598A (en) * 2017-06-21 2017-12-01 华南农业大学 A kind of liquid measure monitoring device and monitoring method
CN110895202A (en) * 2018-09-12 2020-03-20 北京振兴计量测试研究所 Test device for researching influence of environmental factors on flow measurement
CN110895202B (en) * 2018-09-12 2021-10-29 北京振兴计量测试研究所 Test device for researching influence of environmental factors on flow measurement
CN109708728A (en) * 2018-12-11 2019-05-03 广州能源检测研究院 A kind of movable type mass flowmenter on-line calibration device and method
CN109459553A (en) * 2019-01-07 2019-03-12 陈立峰 A kind of water quality monitoring pick up calibration liquid recycling method and system
CN109459553B (en) * 2019-01-07 2021-07-23 浙江锦成科技有限公司 Water quality monitoring sensor calibration solution recycling method and system
CN110793601A (en) * 2019-11-29 2020-02-14 三一汽车制造有限公司 Method for calibrating level indicator, level indicator and asphalt station

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