CN106643990A - Automatic calibration device and method for gas flowmeter - Google Patents

Automatic calibration device and method for gas flowmeter Download PDF

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Publication number
CN106643990A
CN106643990A CN201611041216.8A CN201611041216A CN106643990A CN 106643990 A CN106643990 A CN 106643990A CN 201611041216 A CN201611041216 A CN 201611041216A CN 106643990 A CN106643990 A CN 106643990A
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CN
China
Prior art keywords
pipeline
flowmeter
valves
checked
suspended
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CN201611041216.8A
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Chinese (zh)
Inventor
齐国利
韩仁泰
生成祯
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LIAONING YILIN TECHNOLOGY DEVELOPMENT Co Ltd
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LIAONING YILIN TECHNOLOGY DEVELOPMENT Co Ltd
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Priority to CN201611041216.8A priority Critical patent/CN106643990A/en
Publication of CN106643990A publication Critical patent/CN106643990A/en
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01FMEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F25/00Testing or calibrating apparatus for measuring volume, volume flow or liquid level, or for metering by volume

Abstract

The invention discloses an automatic calibration method for a gas flowmeter, and belongs to the technical field of gas flow calibration devices. A float flowmeter is calibrated by adopting a bell jar type gas flow standardizing device, a meter to be calibrated is calibrated through the calibrated float flowmeter, a gas inlet pipeline of the float flowmeter is connected with the bell jar type gas flow standardizing device, and a gas outlet pipeline of the float flowmeter is connected with a pipeline of the meter to be calibrated. Within a certain range, the requirement for inlet pressure and outlet pressure of the multi-layer flowmeter can be met, and seven different calibration procedures can be met. A rotatable expansion joint and a fixing frame of the meter to be calibrated are installed, vertical and horizontal movement can be performed, respective rotation can also be performed, the performance of multidirectional meter inlet and outlet connection is achieved, and therefore connection of an inlet and outlet of the meter can be rapidly and accurately positioned.

Description

A kind of automatic calibration unit for gas flowmeters and its calibration method
Technical field
The invention belongs to gas flow calibrating installation technical field, more particularly to a kind of gas flowmeter automatic Verification dress Put and its calibration method.
Background technology
Clock is substantially used in present constituent parts and metering institutes, the detection to gas flowmeter argon gas table and suspended body flowmeter Bell-type gas flow standard device.This device to test pressure is smaller and outlet pressure only has one kind, and device can only be carried out Two kinds of combination pressures are demarcated, and the scope of application is too narrow, and operational efficiency much can not meet the quick of production and institutes typically than relatively low The needs of efficient detection instrument, while suspended body flowmeter.The former design connection of the measurement interface of argon gas table etc. is unreasonable, causes every time Dress table is relatively difficult.
The content of the invention
For above-mentioned technical problem, the present invention provides a kind of automatic calibration unit for gas flowmeters and its calibrating side Method, apparatus of the present invention can meet the demand of multi-level flowmeter inlet pressure and outlet pressure in the range of a certain size.
The purpose of the present invention is achieved through the following technical solutions:
A kind of gas flowmeter automatic Verification method, using bell-jar gas flow standard equipment suspended body flowmeter is examined and determine, Table to be checked, the air inlet pipeline connection bell-jar gas flow standard dress of suspended body flowmeter are examined and determine by calibrated suspended body flowmeter Put, the outlet pipe of suspended body flowmeter connects table pipeline to be checked.
The present invention adopts the calibrating installation of the gas flowmeter automatic Verification method, including:
Bell-jar gas flow standard equipment, connects the inlet end of suspended body flowmeter, for examining by pipeline A and pipeline I Determine suspended body flowmeter, table to be checked is examined and determine by calibrated suspended body flowmeter;
Suspended body flowmeter, inlet end connecting line I, outlet side connects table to be checked by pipeline II;
Table to be checked, inlet end is connected on pipeline II, and the outlet side of table to be checked is pipeline III, and No. 12 valves, institute are installed thereon No. 12 valve connection computers are stated, by the computer controls verifying process flow of calibrating installation.
Second calibrating installation of the invention includes:
Vacuum tank, one end connects air compressor by pipeline E, and the other end, by pipeline C connecting lines I, is that pipeline I is defeated Send voltage stabilizing gas;The inlet end of suspended body flowmeter is connected by pipeline I;
Suspended body flowmeter, outlet side connects table to be checked by pipeline II, and the outlet side pipeline III of table to be checked connects No. 12 valves.
The third calibrating installation of the invention, including:
Bell-jar gas flow standard equipment, passes sequentially through the outlet that pipeline A, pipeline I, pipeline IV connect suspended body flowmeter End, for examining and determine suspended body flowmeter, by calibrated suspended body flowmeter table to be checked is examined and determine;
Suspended body flowmeter, the outlet side of suspended body flowmeter connects table to be checked by pipeline II, and the outlet side of table to be checked passes through Pipeline III, pipeline D connect the inlet end of suspended body flowmeter, and No. 6 valves are arranged between pipeline D;
Vacuum tank, one end connects air compressor by pipeline E, and the other end connects table to be checked by blowback air inlet pipeline B Air inlet pipeline II on;
4th kind of calibrating installation of the invention, including:
Vacuum tank, one end connects air compressor by pipeline E, and the other end passes through blowback air inlet pipeline B connecting line II, Pipeline II connects the inlet end of table to be checked, realizes blowback air inlet;
Table to be checked, inlet end is connected on pipeline II, and the outlet side pipeline III of table to be checked connects float-type by pipeline D The inlet end of meter;
Suspended body flowmeter, outlet side connects No. 11 valves by the connecting line I of pipeline IV, the end of pipeline I.
5th kind of calibrating installation of the invention, including:
Bell-jar gas flow standard equipment, connects the inlet end of suspended body flowmeter, for examining by pipeline A and pipeline I Determine suspended body flowmeter, table to be checked is examined and determine by calibrated suspended body flowmeter;
Pipeline I, is divided into three tunnels:All the way end connects No. 11 valves;Two tunnels connect suspended body flowmeter outlet side by pipeline IV; Three tunnels connect the inlet end of suspended body flowmeter by No. 2 valves;It is also associated with just blowing into air pipe C by No. 3 valves on two road pipelines; The pipeline C other ends connect vacuum tank by pressure regulator valve II, No. 9 valves;No. 4 valves are provided with pipeline IV;
Suspended body flowmeter, outlet side is also associated with pipeline II, and inlet end is also associated with pipeline D by No. 6 valves, pipeline II and Connect table pipeline to be checked between pipeline D;
Blowback air inlet pipeline B is also associated between pipeline II and table pipeline to be checked, the pipeline B other ends pass through pressure regulator valve I, 8 Valve connects vacuum tank;No. 5 valves are provided with pipeline II between pipeline B and suspended body flowmeter, gas flow is controlled;
Vacuum tank, inlet end connects air compressor by No. 15 valves and pipeline E;Also by just blowing into tracheae on vacuum tank Road C connecting line I, is just blowing into air pipe C two ends and is being respectively provided with No. 9 valves and No. 3 valves, and No. 9 valves connection vacuum tank ends, No. 3 valves connect The adapter end of road I, the end of pipeline I for connecting No. 3 valves is connected with No. 11 valves;
The end of outlet side pipeline III of table to be checked is also equipped with No. 7 valves, and the pipeline III near No. 7 valves is additionally provided with No. 12 Valve, No. 12 valves connect computer, by the computer controls verifying process flow of calibrating installation;
Connect and be provided with pressure transmitter and temperature transmitter on the inlet end of table to be checked, outlet side pipeline.
Further, the table to be checked installs connection, rotary extension device by being fixedly connected frame and rotary extension device Inlet end connects suspended body flowmeter pipeline II, rotary extension device connecting tube of end road III;
The frame bottom that is fixedly connected is connected on casing, and top connects the inlet end of table to be checked, the outlet side of table to be checked Connection rotary extension device;
The rotary extension device includes level(l)ing device and vertical adjusting means, between the escaping pipe of the table to be checked according to It is secondary to be connected on casing by level(l)ing device and vertical adjusting means, the escaping pipe of the level(l)ing device and table to be checked Between connected by angle joint II, connected by angle joint I between level(l)ing device and vertical adjusting means, vertical adjusting means and Connected by elbow between outlet pipe III;
Further, the level(l)ing device includes:
Horizontal extension bar, one end is socketed in angle joint II, and the other end is sealedly connected in level set, can cover water along level Translation is dynamic and rotates;
Level set, one end sealing shroud connects horizontal extension bar, and other end sealing socket angle joint I, level set inwall carries ring Shape groove, horizontal extension bar with termination with its cannelure minor diameter fit, as spacing when the termination moves to extreme position Block is spacing.
Further, the vertical adjusting means includes:
Fixed seat and stand, described fixed seat one end is placed in casing, and the other end stretches out casing and is connected on casing, is stood Seating is connected in fixed seat outside casing;
Vertical rod, one end is socketed in angle joint I, and the other end is placed in stand and fixed seat;
The stand and fixed seat connection end carry cannelure, after stand is connected with fixed seat, the cannelure internal diameter and The fixed seat internal diameter of connection end is identical, and the fixed seat other end carries internal thread, and the inwall on the inside of internal thread carries annular boss, The annular elongated slot of vertical shift is formed between the cannelure of the boss and stand, is arranged on the annular boss in the annular elongated slot Adjust pad, vertical rod termination is with the termination with annular elongated slot minor diameter fit, ring of the vertical rod termination on adjust pad Vertical shift in shape elongated slot, adjusts the setting height(from bottom) of table to be checked, and vertical rod can be rotated about the axis thereof.
Further, the frame that is fixedly connected includes:
Support, one end is arranged on casing, and other end socket supports fixing pipe;
Fixing pipe, is nested with cantilever tip, and is connected by its upper flange, and fixing pipe one end is matched somebody with somebody with one end of female fitting Conjunction is tightly connected, and is fixed by big nut, the other end connecting line II of fixing pipe 14;
Female fitting, one end is sealedly connected and fixed pipe, and the other end is connected with the pressure-reducing valve end fitted seal of table to be checked;Table to be checked Outlet side angle joint II is tightly connected by little convex joint.
Beneficial effects of the present invention are:
1. a kind of pressure calibration can only be carried out with existing apparatus, the scope of application is too narrow to be compared, apparatus of the present invention are certain big A small range, can meet the demand of multi-level flowmeter inlet pressure and outlet pressure.
2. existing apparatus direct detection gas flowmeter, efficiency comparison is low.Apparatus of the present invention test argon gas table instantaneous delivery Before, first with bell jar examine and determine suspended body flowmeter instantaneous delivery, then again with demarcate after meet instantaneous delivery accuracy requirement float Sub- meter proof, with the instantaneous delivery of suspended body flowmeter argon gas table instantaneous delivery is compared, and efficiently compares calibrating argon gas to be measured Table.The present invention can be demarcated at any time, can examine and determine any point.
3. the present invention is on the basis of with bell-jar gas flow standard equipment, and combination in addition increases air compressor, steady Pressure tank, suspended body flowmeter, various change pipeline detection stream gauge automatically control pipe-line system, by 2 former validation programs, It is changed into 7 detection programs of apparatus of the present invention, the pressure of detection stream gauge is between 1kpa-110kpa-250kpa-600kpa grades Various inlet pressures carry out selection operation.
4. the present invention installs rotatable expansion joint and the fixed mount of table to be checked, not only can move with level up and down Dynamic, acceptable each spinning imports and exports performance with multi-faceted connection instrument, such that it is able to quick and precisely position instrument turnover The connection of mouth.
Description of the drawings
Fig. 1 is the structural representation of the present invention.
Fig. 2 is the top view of Fig. 1.
Fig. 3 is the structural representation of the embodiment of the present invention 3.
Fig. 4 is the structural representation of the embodiment of the present invention 4,5,6.
In figure:101. pipelines I, 102. pipeline II, 103. pipelines III, 104. pipelines IV, 105. pipelines V;
201. tables to be checked;
No. 301.1 valves, No. 302.2 valves, No. 303.3 valves, No. 304.4 valves, No. 305.5 valves, No. 306.6 valves, No. 307.7 Valve, No. 308.8 valves, No. 309.9 valves, No. 310.10 valves, No. 311.11 valves, No. 312.12 valves, No. 313.13 valves, No. 314.14 Valve, No. 315.15 valves, 316. pressure regulator valves I, 317. pressure regulator valve II;
401. bell-jar gas flow standard equipments, 402. encoders, 403. air pumps, 404. meter-clamping apparatus, 405. float streams Gauge, 406. flowmeter supports, 407. casings, 408. table pipelines to be checked, 409. vacuum tanks, 410. air compressors;
501. male connections, 502. adjust pads, 503. fixed seats, 504. stands, 505. vertical rods, 506. angle joints I, 507. level sets, 508. horizontal extension bars, 509. angle joint II, 510. little convex joints, 511. primary nuts, 512. female fittings, 513. big nuts, 514. fixing pipes, 515. supports, 516. cannelures I, 517. sealing rings, 518. terminations I, 519. cannelure II, 520. termination II, 521. boss, 522. elbows;
601. threeways.
Specific embodiment
Describe the present invention with reference to the accompanying drawings and examples.
Embodiment 1:As shown in figure 1, just blowing method using bell jar, the present invention includes:
Bell-jar gas flow standard equipment 401, by pipeline A and pipeline I 101 air inlet of suspended body flowmeter 405 is connected End, for examining and determine suspended body flowmeter 405, by calibrated suspended body flowmeter 405 table to be checked 201 is examined and determine;Bell-jar gas stream The inlet end of amount standard set-up 401 connects air pump 403 by pipeline;
Suspended body flowmeter 405, inlet end connecting line I 101, outlet side connects table to be checked 201 by pipeline II 102;
Table to be checked 201, inlet end is connected on pipeline II 102, and the outlet side of table to be checked 201 is pipeline III 103, its end End is provided with No. 12 valves 312 (electrical ball valve), and No. 12 valves 312 connect computer, is examined by the computer controls of calibrating installation Constant current journey.
Wherein pipeline A two ends are respectively provided with No. 1 valve 301 and No. 10 valves 310 (electrical ball valve);Connection suspended body flowmeter 405 Inlet end pipeline I 101 on arrange No. 2 valves 302;Connect No. 5 valves 305 on pipeline II 102.
Calibrating medium is gas in bell jar (gas pressure is in 1-2kpa in cover), and calibration method is as follows:
(1). it is first shut off No. 12 valves;
(2). air pump 403 (adopting cyclone type air pump) is opened, is opened between air pump and bell-jar gas flow standard equipment 401 No. 13 valves 313 (magnetic valve) and No. 14 valves 314 (hand-operated valve), pressurization make bell jar be promoted to desired height;No. 1 valve 301 of opening, 302, No. 5 valves 305 of No. 2 valves and No. 10 valves 310, by instrument evaluation program flow detection is carried out.
Because suspended body flowmeter class of accuracy high can reach 1-1.5 levels, i.e. elementary error are ± 1~± 1.5%. Argon gas table common accurate grade is 2.5-4.5 levels, it can be seen that suspended body flowmeter class of accuracy is typically accurate higher than argon gas table Exactness.So the instantaneous delivery of argon gas table can be demarcated as standard scale with the suspended body flowmeter demarcated, so as to demarcate its stream Amount.Verification process of the present invention is as follows:
Just blowing method evaluation program as follows:
Suspended body flowmeter class of accuracy high can reach 1-1.5 levels, i.e. elementary error are ± 1- ± 1.5%.Argon gas Table common accurate grade is 2.5-4.5 levels, it can be seen that suspended body flowmeter class of accuracy height and argon gas table common accurate. So the instantaneous delivery of argon gas table can be demarcated as standard scale with the suspended body flowmeter demarcated, so as to demarcate its flow.Its Process is as follows:
1. first, No. 13 valves 313 and No. 14 valves 314 are opened, open air pump 403, with the air pressure of 6Kpa, bell jar 401 is covered Interior pressure rise, slowly makes bell jar cylinder rise to desired height.
2. No. 13 valves 313 are closed, after the air-stable in bell jar, No. 10 valves 310 is opened, the flow of test point is adjusted.
3. signal is sent when the upper lower baffle plate row of bell jar 401 is to optoelectronic switch, timer starts timing, writes down flow Temperature Tm and pressure Pm at meter, while also recording temperature Ts and pressure Ps in bell jar.
4. signal is sent when the upper overhead gage row of bell jar is to optoelectronic switch, send signal and stop timing, write down bell jar Gas volume amount Vs and time t of discharge.
5. scale value under detection state, according to existing computing formula argon gas flow-meter is calculated.
Embodiment 2:As shown in Fig. 2 this example is as different from Example 1:Also connected by threeway 601 on the pipeline II Blowback air inlet pipeline B is connected to, in calibrating, No. 8 valves 308 of air inlet pipeline B ends is closed.This example is just blowing method, blowback for bell jar Air inlet pipeline B plays closing pipe line effect.This example calibration method:It is same as Example 1.
Embodiment 3:As shown in figure 3, this example discloses a kind of automatic calibration unit for gas flowmeters of vacuum tank backblowing, Including:
Bell-jar gas flow standard equipment 401, passes sequentially through pipeline A, pipeline I 101, the connection float stream of pipeline IV 104 The outlet side of gauge 405, for examining and determine suspended body flowmeter 405, by calibrated suspended body flowmeter 405 table to be checked 201 is examined and determine;
Suspended body flowmeter 405, outlet side connects table to be checked 201 by pipeline II 102, and the outlet side of table to be checked 201 passes through Pipeline III 103, pipeline D connect the inlet end of suspended body flowmeter 405, and No. 6 valves 306 are arranged between pipeline D;
Vacuum tank 409, one end connects air compressor 410 by pipeline E, and the other end is connected by blowback air inlet pipeline B On the air inlet pipeline II 102 of table to be checked 201.
The two ends that 307, No. 4 valves 304 of No. 7 valves and pipeline A are respectively provided with the pipeline III 103, pipeline IV 104 set respectively Put 301, No. 10 valves 310 of No. 1 valve;No. 8 valves 308 are set between pipeline B and vacuum tank 409.
Vacuum tank-backblowing, calibrating medium is gas in vacuum tank (vacuum tank outlet gas pressure is in 250kpa), specifically Calibration method is:
Air compressor 410 is opened, No. 15 valves 315 are opened, the pipeline of vacuum tank 409 is connected, 308, No. 4 valves of No. 8 valves are opened 304th, No. 6 301, No. 10 valves 310 of valve of the valve 307,1 of valves 306,7 (pipeline B is connected by table pipeline to be checked with pipeline D), by instrument Table evaluation program carries out flow detection.
Backblowing evaluation program is:
1. with the air pressure within vacuum tank 250Kpa, the internal mask pressure of bell jar 401 is raised, cause bell jar cylinder to start to rise It is high.
2. signal is sent when the upper fooled plate row of bell jar is to optoelectronic switch, timer starts timing, writes down flowmeter Temperature Tm and pressure Pm at place, while also recording temperature Ts and pressure Ps in bell jar.
3. when the upper lower of bell jar sends signal when plate row is to optoelectronic switch, send signal and stop timing, write down bell jar Gas volume amount Vs and time t of discharge.
4. scale value under detection state, according to existing computing formula argon gas flow-meter is calculated.
5. in the range of flow of argon gas table, at least choose 5 equally distributed flow points to be detected.Each flow point Detection number of times no less than 2 times (calibration method see the People's Republic of China (PRC) measure evaluation program JJG257-94).
6. argon gas table class of accuracy is ± 2.5- ± 5% typically in 2.5-4.5 levels, i.e. elementary error.
Embodiment 4:As shown in figure 4, on the basis of embodiment 1, increase pipeline B, pipeline D, vacuum tank 409, pipeline E and Air compressor 410, arranges No. 2 valves 302 on pipeline I 101, control the inlet end gas flow of suspended body flowmeter 405;Pipeline II No. 5 valves 305 are set on 102 so that pipeline B is connected between the pipeline of No. 5 valves 305 and the inlet end of table to be checked 201.Pipeline B and steady No. 8 valves 308 and pressure regulator valve 316 be set between pressure tank 409, and vacuum tank 409 connects air compressor 410 by pipeline E, pipeline E and No. 15 valves 315 are set between air compressor 410.
Calibration method can just blow method according to the bell jar in embodiment 1:
(1). it is first shut off No. 12 valves, No. 8 valves, No. 6 valves;
(2). air pump 403 (adopting cyclone type air pump) is opened, is opened between air pump and bell-jar gas flow standard equipment 401 No. 13 valves 313 (magnetic valve) and No. 14 valves 314 (hand-operated valve), pressurization make bell jar be promoted to desired height;No. 1 valve 301 of opening, 302, No. 5 valves 305 of No. 2 valves and No. 10 valves 310, by instrument evaluation program flow detection is carried out.
This example can also be according to the calibrating of such as lower inverted bell-just blowing method:
(1). close No. 6 valve .7 valve .8 No. 12 valves of valve.
(2). 403 air pumps are opened, No. 13 valve .14 valves are opened, pressurization makes bell jar be promoted to desired height.Open No. 1 valve .2 number valve .5 valve .10 valves (plucking blowback air inlet pipe B pipe), by instrument evaluation program flow detection is carried out.
Embodiment 5:As shown in figure 4, just blowing the automatic calibration unit for gas flowmeters of method using vacuum tank, specifically include:
Vacuum tank 409, one end connects air compressor 410 by pipeline E, and the other end passes through pipeline C connecting lines I 101, it is the conveying voltage stabilizing gas of pipeline I 101;The inlet end of suspended body flowmeter 405 is connected by pipeline I 101;
Suspended body flowmeter 405, outlet side connects table to be checked 201, the outlet side pipeline of table to be checked 201 by pipeline II 102 III 103 No. 12 valves 312 (electrical ball valve) of connection.
Pipeline C two ends connect respectively 303, No. 9 valves 309 of No. 9 valves 309 and No. 3 valves and are placed in the end of vacuum tank 409, No. 3 valves 303 It is placed in the end of pipeline I 101;Pipeline I 101 arranges No. 2 valves 302 with the inlet end of suspended body flowmeter 405;Connect on pipeline II 102 No. 5 valves 305;
Suspended body flowmeter calibrating argon gas table (vacuum tank-just blowing method), calibrating medium is (the tank exit gas of gas in vacuum tank Pressure is in (110kpa), calibration method:
Air compressor 410 is opened, No. 15 valves 315 are opened, the pipeline of vacuum tank 409 is connected, 309, No. 3 valves of No. 9 valves are opened 303rd, No. 2 valves 302,5,305, No. 12 valves 312 carry out flow detection by instrument evaluation program.
Pipeline B can be set between pipeline II 102 and vacuum tank 409, and pipeline B connection vacuum tanks 409 end is provided with pressure regulator valve 316 and No. 8 valves 308, No. 8 valves 308 are closed in calibrating, and pipeline B plays closing pipe line effect.
Embodiment 6:As shown in figure 4, using the automatic calibration unit for gas flowmeters of vacuum tank backblowing, including:
Vacuum tank 409, one end connects air compressor 410 by pipeline E, and the other end is connected by blowback air inlet pipeline B Pipeline II 102, pipeline II 102 connects the inlet end of table to be checked 201, realizes blowback air inlet;
Table to be checked 201, inlet end is connected on pipeline II 102, and the outlet side pipeline III 103 of table to be checked 201 passes through pipeline D connects the inlet end of suspended body flowmeter 405;
Suspended body flowmeter 405, outlet side connects No. 11 by the connecting line I 101 of pipeline IV 104, the end of pipeline I 101 Valve 311.
No. 8 valves 308 are set between pipeline B and vacuum tank 409, and pipeline D two ends are respectively provided with No. 6 valves 306 and No. 7 valves 307,6 Number valve 306 is placed in the inlet end of suspended body flowmeter 405, and No. 7 valves 307 are placed in the end of pipeline III 103;No. 4 valves are set on pipeline IV 104 304;The end of pipeline I 101 arranges No. 11 valves 311.
Suspended body flowmeter examines and determine argon gas table (vacuum tank-backblowing) tank outlet gas pressure at (250kpa), concrete calibrating Method is:
Air compressor 410 is opened, No. 15 valves 315 are opened, the pipeline of vacuum tank 409 is connected, 308, No. 7 valves of No. 8 valves are opened 307th, No. 6 valves 311 of valve 304,11 of valve 306,4.
Flow detection is carried out by instrument evaluation program.
Embodiment 7:This example is summary embodiment 1-6 device and the calibrating installation that designs, it is possible to achieve embodiment 1-6 Various calibration methods.Concrete calibrating installation as shown in figure 4, including:
Bell-jar gas flow standard equipment 401, by pipeline A and pipeline I 101 air inlet of suspended body flowmeter 405 is connected End, for examining and determine suspended body flowmeter 405, by calibrated suspended body flowmeter 405 table to be checked 201 is examined and determine;Bell-jar gas stream The inlet end of amount standard set-up 401 connects air pump 403 by pipeline;
Pipeline I 101, is divided into three tunnels:All the way end connects No. 11 valves 311;Two tunnels connect float stream by pipeline IV 104 The outlet side of gauge 405;Three tunnels connect the inlet end of suspended body flowmeter 405 by No. 2 valves 102;Pass through No. 3 valves on two road pipelines 303 are also associated with just blowing into air pipe C;The pipeline C other ends connect vacuum tank by 317, No. 9 valves 309 of pressure regulator valve II;Pipeline No. 4 valves 104 are provided with IV 104;
Suspended body flowmeter 405, outlet side is also associated with pipeline II 102, and inlet end is also associated with pipeline by No. 6 valves 306 D, connects the pipeline of table to be checked 201 between pipeline II 102 and pipeline D;
Blowback air inlet pipeline B is also associated between pipeline II 102 and the pipeline of table to be checked 201, the pipeline B other ends pass through pressure regulation I 316, No. 8 valves 308 of valve connect vacuum tank;No. 5 valves are provided with pipeline II 102 between pipeline B and suspended body flowmeter 405 105, control gas flow;
Vacuum tank 409, inlet end connects air compressor 410 by No. 15 valves 315 and pipeline E;Also lead on vacuum tank 409 Cross and just blow into air pipe C connecting lines I 101, just blowing into air pipe C two ends and be respectively provided with No. 9 valves 309 and No. 3 valves 303,9 The connection vacuum tank 409 of valve 309 end, No. 3 ends of 303 connecting line of valve I 101 connect the end of pipeline I 101 connection of No. 3 valves 303 There are No. 11 valves 311;
The end of outlet side pipeline III 103 of table to be checked 201 is also equipped with No. 7 valves 307, near the pipeline III of No. 7 valves 307 103 are additionally provided with No. 12 valves 312, and No. 12 valves 312 connect computer, by the computer controls verifying process flow of calibrating installation;
Connect and be provided with pressure transmitter and temperature transmitter on the inlet end of table to be checked 201, outlet side pipeline.
The air compressor 410 and the lower section of vacuum tank 409 are respectively provided with movable pedestal, and the lower section of casing 407 arranges universal Wheel, is movable to specified location.
Using this example calibrating installation, can be examined and determine using 7 kinds of calibration methods is respectively:
Calibration method 1, bell jar-just blowing method, calibrating medium is gas in bell jar (gas pressure is in 1-2kpa in cover), specifically For:
(1) No. 3 valves of valve 309,11 of valve 308,9 of valve 307,8 of valve 306,7 of valve 304,6 of valve 301,4 are closed 311。
(2) 403 air pumps are opened, opens 313, No. 14 valves 314 of No. 13 valves, pressurization makes bell jar be promoted to desired height, opens 1 Number, 301, No. 2 310, No. 12 valves 312 of the valve of valve 305,10 of valves 302,5 (No. 12 valves are by computer controls) identify journey by instrument Sequence carries out flow detection.
Calibration method 2:Bell jar-just blowing method, calibrating medium is gas in bell jar (gas pressure is in 1-2kpa in bell jar), tool Body is:
(1) No. 3 valves of valve 309,11 of valve 308,9 of valve 307,8 of valve 306,7 of valve 304,6 of valve 303,4 are closed 311st, No. 12 valves 312.
(2) 403 air pumps are opened, opens 313, No. 14 valves 314 of No. 13 valves, pressurization makes bell jar be promoted to desired height.Open 1 Number 305, No. 10 valves 310 of the valve of valve 302,5 of valve 301,2 (plucking blowback air inlet pipeline B), by instrument evaluation program flow is carried out Detection.
Calibration method 3:Bell jar-just blowing method, calibrating medium is gas in bell jar (gas pressure is in 1-2kpa in cover) bell jar Export pipeline A is directly connected to the import of table to be checked 201.
Calibration method 4:Vacuum tank-just blowing method, calibrating medium is that (tank outlet gas pressure exists gas in vacuum tank 110kpa), specially:
(1) No. 1 valve of valve 310,11 of valve 308,10 of valve 307,8 of valve 306,7 of valve 304,6 of valve 301,4 is closed 311。
(2) 410 air compressors are opened, opens No. 15 valves 315, connect 409 vacuum tank pipelines, open No. 9 valves 309,3 305, No. 12 valves 312 of valve of valve 302,5 of valve 303,2, by instrument evaluation program flow detection is carried out.
Calibration method 5:Vacuum tank-backblowing, calibrating medium is that (tank outlet gas pressure exists gas in vacuum tank 250kpa), specially:
(1) No. 2 valves of valve 311,12 of valve 309,11 of valve 307,9 of valve 305,7 of valve 303,5 of valve 302,3 are closed 312。
(2) 410 air compressors are opened, opens No. 15 valves 315, connect 409 vacuum tank pipelines, No. 8 valves are opened successively 308th, the valve 307,6 of pressure regulator valve 316,7 valve 306,4 valve 304,1 301, No. 10 valves 310 of valve, are entered by instrument evaluation program Row flow detection.
Calibration method 6:Vacuum tank-backblowing, calibrating medium is that (tank outlet gas pressure exists gas in vacuum tank 250kpa), specially:
(1) No. 2 311, No. 12 valves 312 of valve of valve 309,11 of valve 305,9 of valve 303,5 of valve 302,3 are closed.
(2) 410 air compressors are opened, opens No. 15 valves 315, connect 409 vacuum tank pipelines, open No. 8 valves 308,4 (B is managed and is connected to the air inlet of table to be checked 201 with D pipes the valve 310 of valve 301,10 of valve 307,1 of valve 306,7 of valve 304,6 With escaping pipe terminal), carry out flow detection by instrument evaluation program.
Calibration method 7:Vacuum tank-backblowing, tank outlet gas pressure at (250kpa), specially:
(1) No. 1 valve of valve 310,12 of valve 309,10 of valve 305,9 of valve 303,5 of valve 302,3 of valve 301,2 is closed 312。
(2) 410 air compressors are opened, opens No. 15 valves 315, connect 409 vacuum tank pipelines, open No. 8 valves 308,7 The valve 306,4 of valve 307,6 valve 304, No. 11/311.Flow detection is carried out by instrument evaluation program.
The pipeline of table to be checked 201 in the present invention is by being fixedly connected frame and rotary extension device is connected suspended body flowmeter On 405 casing 407.Specially:
The table to be checked 201 installs connection, rotary extension device inlet end by being fixedly connected frame and rotary extension device The pipeline II 102 of connection suspended body flowmeter, rotary extension device connecting tube of end road III 103;
The frame bottom that is fixedly connected is connected on casing 407, and top connects the inlet end of table 201 to be checked, table to be checked 201 Outlet side connection rotary extension device;
The rotary extension device includes level(l)ing device and vertical adjusting means, the escaping pipe of the table to be checked 201 Pass sequentially through level(l)ing device and vertical adjusting means is connected on casing 407, the level(l)ing device and table to be checked 201 Escaping pipe between connected by angle joint II 509, between level(l)ing device and vertical adjusting means by angle joint I 506 connect Connect, connected by elbow 525 between vertical adjusting means and outlet pipe III 103;
The level(l)ing device includes:
Horizontal extension bar 508, one end is socketed in angle joint II 509, and the other end is sealedly connected in level set 507, can Move horizontally and rotate along level set 507;
Level set 507, one end sealing shroud connects horizontal extension bar 508, other end sealing socket angle joint I 506, level set 507 inwalls carry cannelure I 516, and horizontal extension bar 508 is with the termination I 518 with its minor diameter fit of cannelure I 516, institute State termination I 518 move to it is spacing as limited block during extreme position.
The vertical adjusting means includes:
Fixed seat 503 and stand 504, one end of the fixed seat 503 is placed in casing 407, and the other end stretches out casing 407 simultaneously It is connected on casing 407, stand 504 is placed in outside casing 407, is connected in fixed seat 503;
Vertical rod 505, one end is socketed in angle joint I 506, and the other end is placed in stand 505 and fixed seat 503;
The stand 504 and the connection end of fixed seat 503 carry cannelure II 519, and stand 504 is connected with fixed seat 503 Afterwards, the internal diameters of cannelure II 519 are identical with the internal diameter of fixed seat 503 of connection end, and the other end of fixed seat 503 carries internal thread, Shape between cannelure II 519 of the inwall on the inside of internal thread with annular boss 521, the annular boss 521 and stand 504 Into the annular elongated slot of vertical shift, adjust pad 502, the end band of vertical rod 505 are set on the annular boss 521 in the annular elongated slot There is the termination II 520 with annular elongated slot minor diameter fit, annulars of the vertical rod termination II 520 on adjust pad 502 is long Vertical shift in groove, by the trimmer 502 of differing heights the setting height(from bottom) of table to be checked 201 is adjusted, and vertical rod 505 can be around it Axis rotates.
The frame that is fixedly connected includes:
Support 515, one end is arranged on casing 407, and other end socket supports fixing pipe 514;
Fixing pipe 514, is nested with the top of support 515, and is connected by its upper flange 530, the one end of fixing pipe 514 with it is recessed The one end fits connection of joint 512, is fixed, the other end connecting line II of fixing pipe 514 by big nut 513;
Female fitting 512, one end is connected pipe 514, and the other end is connected with the end of pressure-reducing valve 531 of table to be checked 201;Treat The outlet port of inspection table 201 connects angle joint II 509 by little convex joint 510;
Connected with externally threaded joint 501 by two ends between the fixed seat 503 and elbow 522, it is another in elbow 522 End connecting line III 103.
Described each joint is and is tightly connected.Such as:Stand 504 and the junction of fixed seat 503 pass through sealing ring 517 sealings;Sealing ring 517 is respectively provided between vertical rod 505 and stand 504, between vertical rod 505 and angle joint I 506 to seal;Level set It is respectively provided with sealing ring 517 between 507 two ends and angle joint I 506 and horizontal extension bar 508 to seal;Angle joint II 509 and level are stretched It is respectively provided with sealing ring 517 between contracting bar 508, angle joint II 509 and little convex joint 510 to seal;Little convex joint 510 and table to be checked 201 Escaping pipe between arrange sealing ring 517 seal;The two ends of female fitting 512 are equal between the connecting tube of pressure-reducing valve 531, fixing pipe 514 respectively Arrange sealing ring 517 to seal.Wherein:Little convex joint 510 and female fitting 512 are and coordinate the structure for installing connection.
During installation, horizontal extension bar 508 can be moved horizontally along level set 507, and can cover 507 and angle joint II in level Rotation in 509, the annular elongated slot movement that vertical rod 505 can be in fixed seat 503 and stand 504, it is possible at stand 504 and angle Rotation in joint I 506, to meet the requirement of the vertical height, horizontal length and the anglec of rotation of installing table 201 to be checked, convenient peace Dress.
Heretofore described bell-jar gas flow standard equipment 401, suspended body flowmeter 405, meter-clamping apparatus 404, flow Meter support 406, casing 407, encoder 402 are existing structure.

Claims (10)

1. a kind of gas flowmeter automatic Verification method, it is characterised in that:It is floating using bell-jar gas flow standard equipment calibrating Subflow gauge, by calibrated suspended body flowmeter table to be checked, the air inlet pipeline connection bell-jar gas of suspended body flowmeter are examined and determine Flow standard device, the outlet pipe of suspended body flowmeter connects table pipeline to be checked.
2. a kind of calibrating installation using gas flowmeter automatic Verification method as claimed in claim 1, it is characterised in that:Bag Include
Bell-jar gas flow standard equipment, by pipeline A and pipeline I inlet end of suspended body flowmeter is connected, floating for examining and determine Subflow gauge, by calibrated suspended body flowmeter table to be checked is examined and determine;
Suspended body flowmeter, inlet end connecting line I, outlet side connects table to be checked by pipeline II;
Table to be checked, inlet end is connected on pipeline II, and the outlet side of table to be checked is pipeline III, thereon No. 12 valves of installation, and described 12 Number valve connection computer, by the computer controls verifying process flow of calibrating installation.
3. a kind of calibrating installation using gas flowmeter automatic Verification method as claimed in claim 1, it is characterised in that:Bag Include:
Vacuum tank, one end connects air compressor by pipeline E, and the other end, by pipeline C connecting lines I, is that pipeline I is conveyed surely Calm the anger body;The inlet end of suspended body flowmeter is connected by pipeline I;
Suspended body flowmeter, outlet side connects table to be checked by pipeline II, and the outlet side pipeline III of table to be checked connects No. 12 valves.
4. a kind of calibrating installation using gas flowmeter automatic Verification method as claimed in claim 1, it is characterised in that:Bag Include:
Bell-jar gas flow standard equipment, passes sequentially through the outlet side that pipeline A, pipeline I, pipeline IV connect suspended body flowmeter, For examining and determine suspended body flowmeter, table to be checked is examined and determine by calibrated suspended body flowmeter;
Suspended body flowmeter, the outlet side of suspended body flowmeter connects table to be checked by pipeline II, and the outlet side of table to be checked passes through pipeline IIIth, pipeline D connects the inlet end of suspended body flowmeter, and No. 6 valves are arranged between pipeline D;
Vacuum tank, one end connects air compressor by pipeline E, and the other end connects entering for table to be checked by blowback air inlet pipeline B On air pipe II.
5. a kind of calibrating installation using gas flowmeter automatic Verification method as claimed in claim 1, it is characterised in that:Bag Include:
Vacuum tank, one end connects air compressor by pipeline E, and the other end is by blowback air inlet pipeline B connecting line II, pipeline II connects the inlet end of table to be checked, realizes blowback air inlet;
Table to be checked, inlet end is connected on pipeline II, and the outlet side pipeline III of table to be checked connects suspended body flowmeter by pipeline D Inlet end;
Suspended body flowmeter, outlet side connects No. 11 valves by the connecting line I of pipeline IV, the end of pipeline I.
6. a kind of calibrating installation using gas flowmeter automatic Verification method as claimed in claim 1, it is characterised in that:Bag Include:
Bell-jar gas flow standard equipment, by pipeline A and pipeline I inlet end of suspended body flowmeter is connected, floating for examining and determine Subflow gauge, by calibrated suspended body flowmeter table to be checked is examined and determine;
Pipeline I, is divided into three tunnels:All the way end connects No. 11 valves;Two tunnels connect suspended body flowmeter outlet side by pipeline IV;Three tunnels Connect the inlet end of suspended body flowmeter by No. 2 valves;It is also associated with just blowing into air pipe C by No. 3 valves on two road pipelines;Pipeline The C other ends connect vacuum tank by pressure regulator valve II, No. 9 valves;No. 4 valves are provided with pipeline IV;
Suspended body flowmeter, outlet side is also associated with pipeline II, and inlet end is also associated with pipeline D, pipeline II and pipeline by No. 6 valves Connect table pipeline to be checked between D;
Blowback air inlet pipeline B is also associated between pipeline II and table pipeline to be checked, the pipeline B other ends are connected by I, No. 8 valves of pressure regulator valve Connect vacuum tank;No. 5 valves are provided with pipeline II between pipeline B and suspended body flowmeter, gas flow is controlled;
Vacuum tank, inlet end connects air compressor by No. 15 valves and pipeline E;Also by just blowing into air pipe C on vacuum tank Connecting line I, is just blowing into air pipe C two ends and is being respectively provided with No. 9 valves and No. 3 valves, No. 9 valve connection vacuum tank ends, No. 3 valve connecting tubes The end of road I, the end of pipeline I for connecting No. 3 valves is connected with No. 11 valves;
The end of outlet side pipeline III of table to be checked is also equipped with No. 7 valves, and the pipeline III near No. 7 valves is additionally provided with No. 12 valves, institute No. 12 valve connection computers are stated, by the computer controls verifying process flow of calibrating installation;
Connect and be provided with pressure transmitter and temperature transmitter on the inlet end of table to be checked, outlet side pipeline.
7. the automatic calibration unit for gas flowmeters as described in any one of claim 1-6, it is characterised in that:The table to be checked passes through It is fixedly connected frame and rotary extension device installs connection, rotary extension device inlet end connection suspended body flowmeter pipeline II, rotation Retractor device connecting tube of end road III;
The frame bottom that is fixedly connected is connected on casing, and top connects the inlet end of table to be checked, the outlet side connection of table to be checked Rotary extension device;
The rotary extension device includes level(l)ing device and vertical adjusting means, leads to successively between the escaping pipe of the table to be checked Cross level(l)ing device and vertical adjusting means is connected on casing, lead between the escaping pipe of the level(l)ing device and table to be checked Angle joint II connections are crossed, is connected by angle joint I between level(l)ing device and vertical adjusting means, vertical adjusting means and outlet Connected by elbow between pipeline III.
8. automatic calibration unit for gas flowmeters as claimed in claim 7, it is characterised in that:The level(l)ing device includes:
Horizontal extension bar, one end is socketed in angle joint II, and the other end is sealedly connected in level set, can be moved along level set level Dynamic and rotation;
Level set, one end sealing shroud connects horizontal extension bar, and other end sealing socket angle joint I, level set inwall carries cannelure, With the termination with its cannelure minor diameter fit, the termination limits horizontal extension bar when moving to extreme position as limited block Position.
9. automatic calibration unit for gas flowmeters according to claim 7, it is characterised in that:The vertical adjusting means bag Include:
Fixed seat and stand, described fixed seat one end is placed in casing, and the other end stretches out casing and is connected on casing, and stand is put Outside casing, it is connected in fixed seat;
Vertical rod, one end is socketed in angle joint I, and the other end is placed in stand and fixed seat;
The stand and fixed seat connection end carry cannelure, after stand is connected with fixed seat, the cannelure internal diameter be connected The fixed seat internal diameter at end is identical, and the fixed seat other end carries internal thread, and the inwall on the inside of internal thread carries annular boss, described The annular elongated slot of vertical shift is formed between the cannelure of boss and stand, adjustment is set on the annular boss in the annular elongated slot Pad, vertical rod termination is with the termination with annular elongated slot minor diameter fit, and annular of the vertical rod termination on adjust pad is long Vertical shift in groove, adjusts the setting height(from bottom) of table to be checked, and vertical rod can be rotated about the axis thereof.
10. automatic calibration unit for gas flowmeters as claimed in claim 7, it is characterised in that:The frame that is fixedly connected includes:
Support, one end is arranged on casing, and other end socket supports fixing pipe;
Fixing pipe, is nested with cantilever tip, and is connected by its upper flange, and fixing pipe one end is close with the one end fits of female fitting Envelope connection, is fixed, the other end connecting line II of fixing pipe 14 by big nut;
Female fitting, one end is sealedly connected and fixed pipe, and the other end is connected with the pressure-reducing valve end fitted seal of table to be checked;Table to be checked goes out Gas end is tightly connected angle joint II by little convex joint.
CN201611041216.8A 2016-11-23 2016-11-23 Automatic calibration device and method for gas flowmeter Pending CN106643990A (en)

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CN201611041216.8A CN106643990A (en) 2016-11-23 2016-11-23 Automatic calibration device and method for gas flowmeter

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Publication number Priority date Publication date Assignee Title
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JPH11281453A (en) * 1998-03-31 1999-10-15 Shinagawa:Kk Flowmeter test device and its method
CN201628569U (en) * 2010-03-04 2010-11-10 辽宁省计量科学研究院 High-pressure back-blowing bell-type gas flow standard apparatus
CN203561409U (en) * 2013-11-08 2014-04-23 阿自倍尔仪表(大连)有限公司 Detector for detecting gas flow meter with bell jar type device serving as standard device
CN203964997U (en) * 2014-07-17 2014-11-26 丹东科泰仪器仪表有限公司 A kind of many bell jar type gas flowmeters calibrating installation

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4965756A (en) * 1988-10-11 1990-10-23 Gas Research Institute Method and apparatus for calibration of electronic gas meters
JPH11281453A (en) * 1998-03-31 1999-10-15 Shinagawa:Kk Flowmeter test device and its method
CN201628569U (en) * 2010-03-04 2010-11-10 辽宁省计量科学研究院 High-pressure back-blowing bell-type gas flow standard apparatus
CN203561409U (en) * 2013-11-08 2014-04-23 阿自倍尔仪表(大连)有限公司 Detector for detecting gas flow meter with bell jar type device serving as standard device
CN203964997U (en) * 2014-07-17 2014-11-26 丹东科泰仪器仪表有限公司 A kind of many bell jar type gas flowmeters calibrating installation

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