CN203534660U - Self-calibrated automatic volume calibrating device for oil tank truck - Google Patents
Self-calibrated automatic volume calibrating device for oil tank truck Download PDFInfo
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- CN203534660U CN203534660U CN201320616986.6U CN201320616986U CN203534660U CN 203534660 U CN203534660 U CN 203534660U CN 201320616986 U CN201320616986 U CN 201320616986U CN 203534660 U CN203534660 U CN 203534660U
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Abstract
The utility model relates to a self-calibrated automatic volume calibrating device for an oil tank truck. The self-calibrated automatic volume calibrating device comprises a water pump, a pressure stabilization tank, a regulating valve, a first switching valve, a second switching valve, a third switching valve, a first standard scale, a second standard scale, a third standard scale, a piston type standard pipe prover, a fourth switching valve, a fifth switching valve, a sixth switching valve, a circulation water tank, a liquid level transmitter in the oil tank truck, and a temperature transmitter. Through the self-calibrated automatic volume calibrating device, automatic reading of flow signals, liquid level signals, temperature signals and other signals, automatic processing of data, storage of volume calibration results and printing of reports are achieved. The self-calibrated automatic volume calibrating device can be used for carrying out self calibration on standard flow meters and guarantees accuracy and reliability of magnitude transmission; moreover, automation of the calibration process is achieved, artificial errors are reduced, and calibration efficiency and accuracy of the device are improved.
Description
Technical field
The utility model belongs to test technique automatic field, relates to a kind of self-alignment automatic capacity calibration device for tank truck of being 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 for automobile oil truck capacity calibrating is had to capacity relative method and flowmeter method.Wherein 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 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 manual operation compared with fado, workload is large, inefficiency, and the existence of human factor also makes the reliability of verification result be difficult to guarantee.Flowmeter method is as a kind of high efficiency calibration method, and the tank wagon calibrating for actual, has 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 standard scale fixed point is used, discharge is not often very large, and the time of water filling is longer, and it is not very high making the efficiency of calibrating.
2. the correctness of standard scale is difficult for finding: standard scale in use, when it goes wrong, owing to not there is not checking mechanism, cannot 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, affects 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 utility model, for the technical deficiency of existing apparatus, provides a kind of self-alignment automatic capacity calibration device for tank truck of being with.
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 the fluid level transmitter in automobile oil truck and temperature transmitter.
Water pump is communicated with circulating water pool by pipeline, water delivery side of 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 are also 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.
On described standard scale calibration branch road, be disposed with the 4th switch valve, piston type standard volume pipe, the 5th switch valve.The entrance of the 4th switch valve is connected with the outlet that pipeline is measured in calibrating, the 4th outlet of switch valve and the entrance of piston type standard volume pipe are connected, 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.
The utility model 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.
Accompanying drawing explanation
Fig. 1 is apparatus structure schematic diagram in the utility model.
Fig. 2 is each power unit connection diagram in the utility model.
Fig. 3 is calibration function process flow diagram of the present utility model.
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 entered 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, obtains suitable uninterrupted.When the calibrating of this system in reading road tanker is 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, by PLC, control the first switch valve 4-1 and the 3rd switch valve 4-3 opens, 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 are 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 and all open, make the first standard scale 5-1, the second standard scale 5-2 and the 3rd standard scale 5-3 use in parallel.In verification process, the level value gathering in oil tank by fluid level transmitter 10, measures temperature value by temperature transmitter 11, obtains the required experimental data of calibrating, completes the calibrating to 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.After calibration finishes, open the 5th switch valve 7-5, 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 RS-485 communication port, is connected with computing machine, 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, has IEC 1131-3 instruction set 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 gather 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, controls, and 220V AC isolates output, reaches the object of gauge tap valve opening and closing.For variable valve, to be undertaken by 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 external electromagnetic interference signal from causing interference to 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.By local PC, open login system, after username and password is proved to be successful, can enter assay calibration function pages, otherwise cannot normally enter assay calibration interface.
After logging in successfully, first select the calibration of standard scale or the calibrating to tank wagon.Wherein the calibration of standard scale is 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 check standard scale.
Select, after tank wagon volume calibration, need to select the marked capacity of road tanker, then the use of standard scale selected, can be single only, any one forms of two parallel connections, three parallel connections or three series connection.Also to arrange data acquisition channel setting, measurement range selection and sensor parameters etc. simultaneously, and can import and export 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, after stable, start being examined and determine by oil skimming tank, gather 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.
Automatic Verification process is, according to tested oil tank volume and the vertification regulation selected, system is by Lookup protocol capacity calibrating point, and after starting, program will complete whole verification process according to the step of vertification regulation.
After having examined and determine, can select generation, storage, printing reports and capacities chart, and select again examine and determine or quit a program.Before quitting a program, system just switches off the pump and respective valves.
Claims (1)
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 the fluid level transmitter in automobile oil truck and temperature transmitter, it is characterized in that:
Water pump is communicated with circulating water pool by pipeline, water delivery side of 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 are also 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;
On described standard scale calibration branch road, be disposed with the 4th switch valve, piston type standard volume pipe, the 5th switch valve; The entrance of the 4th switch valve is connected with the outlet that pipeline is measured in calibrating, the 4th outlet of switch valve and the entrance of piston type standard volume pipe are connected, 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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320616986.6U CN203534660U (en) | 2013-09-30 | 2013-09-30 | Self-calibrated automatic volume calibrating device for oil tank truck |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320616986.6U CN203534660U (en) | 2013-09-30 | 2013-09-30 | Self-calibrated automatic volume calibrating device for oil tank truck |
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| CN203534660U true CN203534660U (en) | 2014-04-09 |
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| CN201320616986.6U Expired - Fee Related CN203534660U (en) | 2013-09-30 | 2013-09-30 | Self-calibrated automatic volume calibrating device for oil tank truck |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103499373A (en) * | 2013-09-30 | 2014-01-08 | 中国计量学院 | Automobile oil tank truck capacity automatic inspection device with self-calibration function and inspection method |
| CN107782420A (en) * | 2017-09-30 | 2018-03-09 | 广州能源检测研究院 | A kind of automobile oil truck capacity Quick calibration device and method |
-
2013
- 2013-09-30 CN CN201320616986.6U patent/CN203534660U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103499373A (en) * | 2013-09-30 | 2014-01-08 | 中国计量学院 | Automobile oil tank truck capacity automatic inspection device with self-calibration function and inspection method |
| CN103499373B (en) * | 2013-09-30 | 2016-01-13 | 中国计量学院 | Be with self-alignment automatic capacity calibration device for tank truck and method |
| CN107782420A (en) * | 2017-09-30 | 2018-03-09 | 广州能源检测研究院 | A kind of automobile oil truck capacity Quick calibration device and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140409 Termination date: 20150930 |
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| EXPY | Termination of patent right or utility model |