CN109405937A - A kind of wide-range is than the method that water meter verifies standard set-up and its water meter verification - Google Patents
A kind of wide-range is than the method that water meter verifies standard set-up and its water meter verification Download PDFInfo
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- CN109405937A CN109405937A CN201811600405.3A CN201811600405A CN109405937A CN 109405937 A CN109405937 A CN 109405937A CN 201811600405 A CN201811600405 A CN 201811600405A CN 109405937 A CN109405937 A CN 109405937A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 497
- 238000012795 verification Methods 0.000 title claims abstract description 101
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- 238000007906 compression Methods 0.000 claims abstract description 13
- 238000009434 installation Methods 0.000 claims abstract description 13
- 230000002093 peripheral effect Effects 0.000 claims abstract description 9
- 238000009825 accumulation Methods 0.000 claims description 62
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- 230000002441 reversible effect Effects 0.000 claims description 47
- 239000003638 chemical reducing agent Substances 0.000 claims description 42
- 238000007667 floating Methods 0.000 claims description 42
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- 210000000664 rectum Anatomy 0.000 claims description 35
- 238000002955 isolation Methods 0.000 claims description 24
- 210000000476 body water Anatomy 0.000 claims description 12
- 238000007789 sealing Methods 0.000 claims description 10
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- FGUUSXIOTUKUDN-IBGZPJMESA-N C1(=CC=CC=C1)N1C2=C(NC([C@H](C1)NC=1OC(=NN=1)C1=CC=CC=C1)=O)C=CC=C2 Chemical compound C1(=CC=CC=C1)N1C2=C(NC([C@H](C1)NC=1OC(=NN=1)C1=CC=CC=C1)=O)C=CC=C2 FGUUSXIOTUKUDN-IBGZPJMESA-N 0.000 claims description 3
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- 230000002159 abnormal effect Effects 0.000 abstract description 5
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- 239000007788 liquid Substances 0.000 description 14
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- 238000006243 chemical reaction Methods 0.000 description 2
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- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 description 2
- 238000005303 weighing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F25/00—Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume
- G01F25/10—Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume of flowmeters
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Abstract
The invention discloses a kind of wide-ranges for water meter verification to verify the method that standard set-up and water meter verify than water meter.Wide-range provided by the present invention includes piston type device and peripheral system as Main Regulator, calibrating installation, compression system, high water tank and exhaust system than water meter verification standard set-up.The present invention not only realizes the verification of water meter, it is often more important that by using column disk combination shape standard, substantially increases the ability of calibration equipment lower limit measurement, overcomes device and be difficult to provide the problem of the small flow verification of water meter；In addition, because back pressure deficiency bring works abnormal problem when small flow back pressure system effectively overcomes water meter small flow verification.
Description
Technical field
The present invention relates to a kind of wide-ranges for water meter verification to verify the method that standard set-up and water meter verify than water meter.
Background technique
When verifying at present to water meter, the calibration equipment of use is mainly Static Volumetric Method or Static mass method liquid flow
Measure standard set-up.These two types of liquid flow standard devices meet the verification requirement of water meter to a certain extent, but in use
There is also obvious defects, are mainly shown as: (i) Static Volumetric Method liquid flow standard device verifies efficiency to water meter
It is low.Since the work measuring instrument of Static Volumetric Method liquid flow standard device is usually the Pear-Shaped measuring device for having metering neck.It utilizes
When device water meter carries out flow verification, only liquid reaches at metering neck, and the volume in measuring device could be read.Therefore, it verifies
When flow is smaller, the verification used time is longer, shows as verification inefficiency；(ii) flow settling time is long.By water meter by a mesh
When mark flow point is adjusted to another target flow point, then the pressure in corresponding pipeline will change therewith, pipeline internal pressure
The pressure that will affect in pressurizing vessel changes again for the variation of power, and in pressurizing vessel the variation of pressure will affect water pump to
Pressurizing vessel water-supply quantity changes, this change procedure needs longer regulating time could be steady by the pressure in pressurizing vessel
It is scheduled within the scope of constant pressure, guarantees the stabilization of flow in pipeline, and then realize the verification of watermeter flowing rate；(iii) Static mass method liquid
Weighing apparatus in body flow standard device is influenced vulnerable to environment (as vibrated, temperature, humidity etc.), and environmental condition is difficult to protect
Card, especially water pump, pipe vibration, thus weighing apparatus is very affected by environment is easy to happen drift, accuracy is difficult to be protected
Card；(iv) Static Volumetric Method or Static mass method liquid flow standard device occupied space are big, are difficult to move if building up, and
Verification liquid flow standard device for watermeter flowing rate generally requires facility compact, occupies little space, therefore device is difficult to completely
Foot requires；(v) Static Volumetric Method or Static mass method liquid flow standard device are not easy energy conservation, and water pump once starts, even if inspection
Water meter is replaced between periodically, device also no longer stops, therefore it is serious to consume energy.
Patent No.: ZL 2,011 1 0339915.1, patent name are as follows: a kind of apparatus for calibrating water meter and water meter calibration
Method discloses a kind of method of apparatus for calibrating water meter and water meter calibration.Each chronoscope of apparatus for calibrating water meter in the invention
Frequency device respectively with the pulse control connection of corresponding photoelectric sampler and servo motor；Protect the cylinder of sleeve and hydraulic cylinder
Body is fixedly connected, and servo motor is fixed on protection sleeve, and the rotation axis of servo motor is solid by one end of shaft coupling and lead screw
Fixed connection, the other end of lead screw are connect with feed screw nut, one end connection of the piston of feed screw nut and hydraulic cylinder；Hydraulic cylinder is equipped with
Cylinder body water inlet and cylinder body water outlet, water tank are equipped with water tank inlet and water outlet of water tank, and cylinder body water inlet passes through the first water inlet
Pipe is connected to water outlet of water tank, and cylinder body water outlet is equipped with outlet pipe；Second water inlet pipe is installed at water tank inlet, first
Switch valve is mounted on water inlet pipe, the second water inlet pipe and outlet pipe.The device of the invention for water meter verify when it is existing not
Foot place is as follows: (i) cannot achieve the wide-range ratio of flow output.Only using cylinder body as volumetric standard, and use piston and cylinder
Mates flow through tested water according to certain flow velocity in outlet pipe by the intracorporal water of cylinder by the mobile discharge cylinder body of piston
Table is realized by the verification of water gauge；Since moving horizontally for piston is to pass through lead screw, feed screw nut by the rotation of servo motor
Made of cooperation conversion, when flow is smaller, needs lead screw to rotate with lower angular speed and piston is pushed slowly to run, and lead screw
Rotation be to be driven by servo motor, therefore servo motor must rotate that be just supplied to lead screw lower with lower angular speed
Rotational angular velocity, however servo motor will will appear creeping phenomenon under lower velocity of rotation, cause entire piston system
Fluctuation of service, therefore the type piston cannot provide lesser flow；Therefore, the maximum stream flow that can be provided in the type piston is certain
Under the premise of, since the type piston can only provide biggish flow, and smaller flow can not be provided, cause the type piston that can mention
The maximum of confession is smaller with minimum discharge, thus cannot achieve wide-range ratio.It (ii) can not be in tested water under small flow rate
Table downstream provides enough back pressures.When verification is by water gauge, to guarantee to make to be worked normally by water gauge, need in tested water
Table downstream provides enough back pressures, and in small flow due to smaller by the water flow loss in water gauge downstream line, downstream back
Pressure pipe is due to workshop or tests the high limitation of room floor, and height is usually no more than 2m (the general 1m of checking table height), the height
Back pressure pipe overcomes the crushing of pipeline to exist when the back pressure that water meter downstream is formed flows in by water gauge downstream line plus water flow
The back pressure formed by water gauge downstream is not enough to provide enough back pressures to by water gauge, therefore when small flow, because of no normal direction quilt
Water gauge provides enough back pressures, it is easy to cause by water gauge cisco unity malfunction, bring difficulty to by water gauge verification.
A kind of Patent No.: ZL 2,016 1 0120739.1, patent name are as follows: mark of permanent flow valve flow and differential pressure verification
Standard apparatus and the method for verification disclose a kind of method of the standard set-up and verification of permanent flow valve flow and differential pressure verification.The hair
The stepper motor of permanent flow valve flow in bright and differential pressure verification standard set-up is fixed on speed reducer, the rotation axis of stepper motor with
Speed reducer input axle sleeve is connected, and the output shaft of speed reducer is fixedly connected by shaft coupling with the end of lead screw one end, lead screw one
After the end at end and the other end close to end and lead screw is respectively arranged with lead screw axle sleeve, is equipped on the lead screw between lead screw axle sleeve
Feed screw nut, feed screw nut are fixed on the centre of slidably metal support, and slidably metal support lower end is connect with linear guide,
Slidably metal support top is equipped with floating junction, and floating junction is fixedly connected with the cylinder-piston in hydraulic cylinder, cylinder-piston
Y-type seal ring is housed between hydraulic cylinder；The inside of linear guide is equipped with grating scale, the photoelectric reader of grating scale in the invention
It is fixedly connected with slidably metal support；Hydraulic cylinder in the invention is equipped with cylinder body exhaust calibration mouth, and cylinder body exhaust calibration mouth is logical
It crosses stainless steel pipes to be fixedly connected with manual switch ball valve one end, the fixed company of the manual switch ball valve other end and back pressure pipe one end
It connects, the back pressure pipe other end is fixedly connected with nozzle, and the water inlet of hydraulic cylinder passes through cylinder body water inlet switch ball valve and water tank connection；Liquid
The water outlet of cylinder pressure is connect with one end of cylinder body effluent switch ball valve, the other end of cylinder body effluent switch ball valve by tee tube,
Meter-clamping apparatus preceding switch ball valve is connect with preceding straight pipe, and the other end of cylinder body effluent switch ball valve also passes through tee tube, discharge pump
Switching ball is connect with discharge pump afterwards, and discharge pump preceding switch ball valve is provided on the gas outlet of discharge pump；Preceding straight pipe
Permanent flow valve to be calibrated is provided between rear straight pipe, the both ends of permanent flow valve are parallel with differential pressure transmitter, and rear straight pipe passes through
Indicating flow meter preceding switch ball valve is connect with indicating flow meter, and indicating flow meter is connected to water tank.With Patent No.: ZL 2011
1 0339915.1, patent name are as follows: the patent of invention of a kind of method of apparatus for calibrating water meter and water meter calibration is similar, the invention
Device for permanent flow valve flow and differential pressure verify when, existing shortcoming is as follows: (i) cannot achieve flow output width
Range ratio.The invention device uses the cooperation between cylinder-piston and hydraulic cylinder only using cylinder-piston as volumetric standard, will
Water in hydraulic cylinder is flowed through in forward and backward straight pipe according to certain flow velocity permanent by the mobile discharge hydraulic cylinder of cylinder-piston
Valve is flowed, realizes flow and the differential pressure verification of tested permanent flow valve；Since moving horizontally for cylinder-piston is rotation by stepper motor
Made of cooperation conversion by lead screw and feed screw nut, when flow is smaller, lead screw needs are pushed away with lower rotational angular velocity
Dynamic cylinder-piston is slowly run, and the rotation of lead screw is driven by stepper motors, therefore stepper motor must be with lower turn
Dynamic angular speed can just be supplied to the lower rotational angular velocity of lead screw, however stepper motor will will appear under lower velocity of rotation
Creeping phenomenon causes entire piston system fluctuation of service, therefore the type piston can not provide lesser flow；Therefore, in the type
Under the premise of the maximum stream flow that piston can be provided is certain, since the type piston can only provide biggish flow, and it can not provide
Smaller flow, the maximum for causing the type piston can be provided is smaller with minimum discharge, thus cannot achieve wide-range ratio.
(ii) enough back pressures can not provided by permanent flow valve downstream under small flow rate.When verifying tested permanent flow valve, it is necessary to tested
Permanent flow valve downstream provides enough back pressures, and in small flow since the water flow loss being detected in permanent flow valve downstream line is smaller,
Downstream back pressure pipe is due to workshop or tests the high limitation of room floor, and height is usually no more than 2m (the general 1m of checking table height), should
The back pressure pipe of height overcomes pipe when the back pressure that permanent flow valve downstream is formed flows in tested permanent flow valve downstream line plus water flow
The back pressure that the crushing in road is formed in tested permanent flow valve downstream is not enough to provide enough back pressures, therefore small stream to tested permanent flow valve
When amount, enough back pressures are provided because no normal direction is detected permanent flow valve, it is easy to cause tested permanent flow valve work abnormal, to tested perseverance
Stream valve verification brings difficulty.
In conclusion many defects as existing for Static Volumetric Method or Static mass method liquid flow standard device and specially
Benefit number is respectively as follows: ZL 2,011 1 0339915.1, ZL 2,016 1 0120739.1, and corresponding patent name is respectively as follows: one kind
The method of the method for apparatus for calibrating water meter and water meter calibration, the standard set-up of a kind of permanent flow valve flow and differential pressure verification and verification
Deficiency present in patent of invention, therefore it is badly in need of a kind of fluid flow standard (or water meter verification) device of novel wide-range ratio
Substitute current Static Volumetric Method, Static mass method or Patent No.: ZL 2,011 1 0339915.1, ZL 2,016 1
The liquid flow standard device invented in 0120739.1.
Summary of the invention
The object of the present invention is to provide a kind of wide-ranges of column disk combination shape for water meter verification than piston water meter school
Experiment device and the method that water meter is verified using the device.
To achieve the above object, the technical solution used in the present invention is: provided wide-range verifies standard than water meter
Device includes piston type device and peripheral system as Main Regulator, calibrating installation, compression system, high water tank and exhaust system
System.Piston type device and peripheral system as Main Regulator include servomotor, gear reducer, speed reducer metal support, shaft coupling
Metal support before device, lead screw, lead screw, linear guide, piston metallic support, slidably metal support, feed screw nut, floating connect
Head, cylinder-piston, front-bank rotor housing water inlet switch ball valve, front-bank rotor housing water inlet line, front-bank rotor housing exhaust pipe, front-bank rotor housing manual exhaust ball
Metal support, piston after valve, piston cylinder forward flange, piston cylinder, front-bank rotor housing outlet conduit, front-bank rotor housing effluent switch ball valve, lead screw
Metal support, disk piston, piston cylinder rear flange, rear-bank rotor housing manual exhaust ball valve, rear-bank rotor housing exhaust pipe, rear-bank rotor housing water inlet pipe
Road, rear-bank rotor housing water inlet switch ball valve, rear-bank rotor housing outlet conduit, rear-bank rotor housing effluent switch ball valve, front and back cylinder body outlet pipe batching sphere
Valve, front and back cylinder body outlet pipe isolation ball valve connecting tube.Calibrating installation includes connecting tube before meter-clamping apparatus preceding switch ball valve, meter-clamping apparatus
Road, meter-clamping apparatus, preceding straight pipe, by water gauge electromechanical transformation apparatus, by water gauge, rear straight pipe, calibrating installation support frame, converge
Pipe, small-bore back pressure switch ball valve, with latus rectum back pressure switch ball valve, small-bore back pressure pipeline, with latus rectum back pressure pipeline.Compression train
System includes switching ball, pressure pump, pressure pump preceding switch ball valve, pressure (hydraulic) water after pressure pump outlet conduit, pressure pump
Pump water inlet pipeline；Pressure pump outlet pipe is fixedly connected by tee tube with small-bore back pressure pipeline.Exhaust system includes exhaust
Switching ball, exhaust outlet conduit after water inlet line, discharge pump preceding switch ball valve, discharge pump, discharge pump.
Piston type device and peripheral system use servo motor as driving device, and servo motor is fixed on speed reducer, watched
It takes motor to be fixedly mounted on decelerator shell, speed reducer is fixedly mounted in speed reducer metal support, speed reducer metal support
Be fixedly mounted on piston metallic support, the rotation axis of servo motor is connected with the input axle sleeve of speed reducer, speed reducer it is defeated
Shaft is fixedly connected by shaft coupling with the end front end of lead screw one end, between the end and threads of lead screw of lead screw one end and silk
It is respectively arranged with lead screw axle sleeve between the end and threads of lead screw of the thick stick other end, feed screw nut is housed on the lead screw between lead screw axle sleeve,
Feed screw nut is fixed on the centre of slidably metal support, and slidably metal support lower end is connect with linear guide, slidably golden
Belong to holder top and floating junction be housed, floating junction is fixedly connected with one end of the cylinder-piston in piston cylinder, cylinder-piston and
There are certain water-filling gaps between piston cylinder, are sealed between cylinder-piston and piston cylinder forward flange using y-type seal ring, Y type
Sealing ring is fixedly mounted on piston cylinder forward flange, and piston cylinder forward flange is fixedly mounted on the front end of piston cylinder, piston cylinder and work
It is sealed between plug cylinder forward flange using O-ring seal；The other end of cylinder-piston and the disk piston being mounted in piston cylinder are solid
Fixed connection, is equipped with y-type seal ring and guide ring between disk piston and piston cylinder, piston cylinder rear flange is fixedly mounted on piston cylinder
Rear end, between piston cylinder and piston cylinder rear flange using O-ring seal seal, lead screw axle sleeve and piston cylinder are fixedly mounted on
In corresponding metal support；Piston cylinder forward flange is equipped with front-bank rotor housing exhaust calibration mouth, front-bank rotor housing water inlet and front-bank rotor housing
Water outlet；Front-bank rotor housing exhaust calibration mouth connects by the way that front-bank rotor housing exhaust connection road and front-bank rotor housing manual exhaust ball valve one end are fixed
It connects, the front-bank rotor housing manual exhaust ball valve other end is fixedly connected with one end of front-bank rotor housing exhaust pipe, and front-bank rotor housing exhaust pipe is tool
Have a rigid conduit of certain altitude (being higher by accumbency piston cylinder certain distance), the other end of front-bank rotor housing exhaust pipe be water outlet to
Under inverted U pipeline；Front-bank rotor housing water inlet passes through one end of front-bank rotor housing water inlet connecting pipe and front-bank rotor housing water inlet switch ball valve
It is fixedly connected, the other end of front-bank rotor housing water inlet switch ball valve is fixedly connected with one end of front-bank rotor housing water inlet line, front-bank rotor housing water inlet
The other end of pipeline is fixedly connected with the front-bank rotor housing feed water inlet on high water tank；Front-bank rotor housing water outlet is discharged by front-bank rotor housing and is connected
Pipeline is fixedly connected with one end of front-bank rotor housing effluent switch ball valve, and the other end and front-bank rotor housing of front-bank rotor housing effluent switch ball valve are discharged
One end of pipeline is fixedly connected, the fixed company of the other end of front-bank rotor housing outlet conduit and one end of front and back cylinder body outlet pipe isolation ball valve
It connects, the fixed company of the other end of front and back cylinder body outlet pipe isolation ball valve and one end of front and back cylinder body outlet pipe isolation ball valve connecting tube
It connects, the other end of front and back cylinder body outlet pipe isolation ball valve connecting tube is fixedly connected by the threeway of T shape with discharge pump outlet conduit；
Piston cylinder rear flange is equipped with rear-bank rotor housing exhaust calibration mouth, rear-bank rotor housing water inlet and rear-bank rotor housing water outlet；Rear-bank rotor housing exhaust calibration
Mouth is fixedly connected by rear-bank rotor housing exhaust connection road with rear-bank rotor housing manual exhaust ball valve one end, and rear-bank rotor housing manual exhaust ball valve is another
One end is fixedly connected with one end of rear-bank rotor housing exhaust pipe, and rear-bank rotor housing exhaust pipe is (to be higher by piston cylinder (piston with certain altitude
Cylinder is accumbency piston cylinder) certain distance) rigid conduit, the other end of rear-bank rotor housing exhaust pipe is the downward inverted U of water outlet
Pipeline；Rear-bank rotor housing water inlet is fixedly connected by rear-bank rotor housing water inlet connecting pipe with one end of rear-bank rotor housing water inlet switch ball valve,
The other end of rear-bank rotor housing water inlet switch ball valve is fixedly connected with one end of rear-bank rotor housing water inlet line, rear-bank rotor housing water inlet line it is another
End is fixedly connected with the rear-bank rotor housing feed water inlet on high water tank；Rear-bank rotor housing water outlet is discharged connecting pipe and rear cylinder by rear-bank rotor housing
One end of body effluent switch ball valve is fixedly connected, the other end of rear-bank rotor housing effluent switch ball valve and one end of rear-bank rotor housing outlet conduit
It is fixedly connected, the other end of rear-bank rotor housing outlet conduit is fixedly connected with one end of meter-clamping apparatus preceding switch ball valve.The folder of calibrating installation
Table device is fixedly mounted on calibrating installation supporting framing front end, before the water inlet end of meter-clamping apparatus is by connecting pipe before meter-clamping apparatus and meter-clamping apparatus
The other end of switching ball is fixedly connected, and the water outlet of meter-clamping apparatus is connect with one end of preceding straight pipe, preceding straight pipe and tested water
The water inlet end of table connects, and is fixedly connected by the water outlet of water gauge with one end of rear straight pipe, the other end of rear straight pipe with together
One end of the header of latus rectum is fixedly connected, and is fixedly connected with the other end of latus rectum header with one end of elbow, the other end of elbow
It is fixedly connected with back pressure connecting tube one end of same latus rectum vertically upward, the other end with latus rectum back pressure connecting tube is carried on the back with latus rectum
Compress switch one end of ball valve is fixedly connected, the other end with latus rectum back pressure switch ball valve with one end with latus rectum back pressure pipe is fixed connects
It connects, is fixedly connected with the other end of latus rectum back pressure pipe with the same latus rectum back pressure pipe water outlet on high water tank；Header is fixedly mounted
Being provided with apopore on the end of calibrating installation support frame, the outer wall of header middle position vertically upward, (apopore internal diameter is little
In DN15), one end of small-bore back pressure connecting tube identical with apopore internal diameter is connected with the apopore, and is fixed on water outlet
On header outer wall around hole, the other end of small-bore back pressure connecting tube is fixedly connected with small-bore back pressure switch ball valve one end,
The small-bore back pressure switch ball valve other end is fixedly connected with small-bore back pressure pipe one end, the other end and a high position of small-bore back pressure pipe
Small-bore back pressure pipe water outlet on water tank is fixedly connected；Small-bore back pressure pipe middle position is equipped with T-type threeway, T-type threeway
Two opposite nozzles are connected fixation with small-bore back pressure pipe, and another nozzle of T-type threeway and the other end of pumping line are solid
Fixed connection.One end of the pressure pump water inlet of compression system and pressure pump water inlet connecting tube is fixedly connected, pressure pump into
The water connecting tube other end is fixedly connected with one end of pressure pump preceding switch ball valve, the other end of pressure pump preceding switch ball valve with
One end of pressure pump water inlet pipe is fixedly connected, the other end of pressure pump water inlet pipe and the pressure pump feed water inlet of high water tank
It is fixedly connected；Pressure pump water outlet is fixedly connected with one end of pressure pump water outlet connecting tube, and pressure pump is discharged connecting tube
The other end be fixedly connected with one end of switching ball after pressure pump, the other end and pressure (hydraulic) water of switching ball after pressure pump
One end of water pump outlet pipe is fixedly connected, and the other end of pressure pump outlet pipe is fixedly connected with another nozzle of T-type threeway.It is high-order
Water tank is placed higher than at the position of accumbency piston, is equipped with front-bank rotor housing feed water inlet, rear-bank rotor housing feed water inlet, water pump feed water inlet, small-bore
Back pressure pipe water outlet and with latus rectum back pressure pipe water outlet.High water tank is cubic water tank, and clear height is not less than 0.7m, water tank in water tank
Interior height of water level is not less than 0.5m, and high water tank bottom is higher than piston cylinder.Exhaust water inlet line one end of exhaust system and a high position
Water tank is fixedly connected, and the water inlet of exhaust water inlet line one end is located in high water tank, is vented the other end and the row of water inlet line
One end of air water pump preceding switch ball valve is fixedly connected, connecting pipe before the other end and discharge pump of discharge pump preceding switch ball valve
One end be fixedly connected, the other end of connecting pipe is fixedly connected with the water inlet of discharge pump before discharge pump, discharge pump
Water outlet be fixedly connected with one end of connecting pipe after discharge pump, after discharge pump the other end of connecting pipe and exhaust water
One end of switching ball is fixedly connected after pump, one end of the other end of switching ball and discharge pump outlet conduit after discharge pump
It is fixedly connected, the other end of discharge pump outlet pipe is fixedly connected with high water tank, the water outlet of the discharge pump outlet pipe other end
Mouth is located in high water tank.
Further, servo motor of the present invention is replaced with stepper motor.
When the present invention verifies the small flow of water meter using the above calibration device for water meters, by the rear straight pipe in water gauge downstream
The method for generating back pressure includes the following steps and principle:
I) while control rotation to revolving speed corresponding with the lower-capacity point by water gauge of required verification, pressurization is opened
Water pump preceding switch ball valve, starting pressure pump.
Ii) water in high water tank is under pressure pump effect, via pressure pump water inlet pipe, pressure pump preceding switch ball
After valve, pressure pump, pressure pump after switching ball, pressure pump outlet conduit enter small-bore back pressure pipeline, and finally by
Small-bore back pressure pipeline flows into high water tank.
Iii when) water flow of pressure pump supply flows into high water tank via small-bore back pressure pipeline, the water flow is in pipeline pressure
The effect of damage is generated quick more than minimum back pressure required when being verified by water gauge, the back pressure in small-bore back pressure pipeline
It is sent to by rear straight pipe by water gauge.
Iv) starting of pressure pump reversely accelerates control synchronous with verification by servo motor when water gauge lower-capacity point, and
The flow settling time and servo motor of pressure pump supply water flow reversely accelerate to corresponding to the tested watermeter flowing rate point of verification
The constant rotational speed time is shorter, and the two can reach flow equilibrium point in a short time, namely achieve that small stream in a short time
Amount verification back pressure system establishes constant, enough back pressures to by water gauge.
The present invention is included the following steps: using the method that the above calibration device for water meters verifies water meter
A. the verification of large-capacity point
A) by tested water pump composite between the preceding straight pipe and the rear straight pipe.
B) step 9) is executed, control servo motor, which rotates backward, drives speed reducer to rotate in same direction, the rotation of servo motor
Lead screw is driven to rotate backward after speed reducer slows down, rotating backward for lead screw is converted to by the cooperation of lead screw and feed screw nut
Feed screw nut reversely moves horizontally, and slidably metal support makees reverse sync level for the drive that reversely moves horizontally of feed screw nut
Mobile, slidably the reverse sync of metal support, which moves horizontally, drives floating junction to move horizontally as reverse sync, floating junction
Reverse sync move horizontally cylinder-piston and disk piston pulled to move horizontally as reverse sync, until cylinder-piston is another
End and disk piston reach at the top of piston cylinder.
C) the front and back cylinder body outlet pipe isolation ball valve and rear-bank rotor housing effluent switch ball valve are closed；Open the tong-test ammeter
Device preceding switch ball valve, small-bore back pressure switch ball valve, with latus rectum back pressure switch ball valve, discharge pump preceding switch ball valve and exhaust water
Switching ball after pump, starting discharge pump by connecting pipe before rear-bank rotor housing outlet conduit, meter-clamping apparatus preceding switch ball valve, meter-clamping apparatus,
Meter-clamping apparatus, preceding straight pipe, by water gauge, rear straight pipe, header, small-bore back pressure switch ball valve, with latus rectum back pressure switch ball valve,
Small-bore back pressure pipeline, with latus rectum back pressure pipeline, exhaust water inlet line, discharge pump preceding switch ball valve, discharge pump, be vented out
Air in waterpipe excludes clean.
D) the front-bank rotor housing manual exhaust ball valve, front-bank rotor housing effluent switch ball valve, the isolation of front and back cylinder body outlet pipe are closed
Switching ball, small-bore back pressure switch after ball valve, rear-bank rotor housing manual exhaust ball valve, rear-bank rotor housing water inlet switch ball valve, discharge pump
Ball valve；Open the front-bank rotor housing water inlet switch ball valve, rear-bank rotor housing effluent switch ball valve, meter-clamping apparatus preceding switch ball valve, same to latus rectum
Back pressure switch ball valve.
E) control servo motor forward direction accelerates to remain a constant speed after rotating to revolving speed corresponding with required checking flow and turn
It is dynamic, while the driving lead screw after the certain reduction ratio of speed reducer is slowed down that rotates forward of servo motor rotates forward, and passes through silk
Thick stick and feed screw nut, the slidably cooperation between metal support, floating junction, cylinder-piston and disk piston are by the rotation of lead screw
Be converted to moving horizontally for cylinder-piston and disk piston, on the one hand cylinder-piston and disk piston are moved horizontally high-order water
Water in case is located at piston cylinder inner piston cylinder forward flange, column by front-bank rotor housing water inlet line and the sucking of front-bank rotor housing water inlet switch ball valve
Space between shape piston and disk piston is water-filling space, on the other hand will be between piston cylinder rear flange, disk piston
Water-filling space in water under the promotion of disk piston with by required checking flow by rear-bank rotor housing effluent switch ball valve, after
Cylinder body outlet conduit discharges, by connecting pipe, meter-clamping apparatus, preceding straight pipe, quilt before meter-clamping apparatus preceding switch ball valve, meter-clamping apparatus
Water gauge, rear straight pipe, header, with latus rectum back pressure switch ball valve, with after latus rectum back pressure pipeline enter high water tank；It is living in cylindricality
After plug and disk piston correspondingly switch to constant level's movement by acceleration level is mobile, temporal frequency recorder starts to watch driving
The frequency for taking motor rotation is accumulated, while recording frequency accumulates time started t1；It is corresponding in cylinder-piston and disk piston
After ground switchs to constant level's movement by acceleration level is mobile, temporal frequency recorder starts to by the frequency letter of the output of water gauge
It number is accumulated, while recording frequency accumulates time started t'1；When time frequency recorder is to by the frequency of the output of water gauge
When the accumulation of signal reaches low-limit frequency signal number, temporal frequency recorder stops to by the frequency signal of the output of water gauge
Accumulation, while record accumulation dwell time t'2With the accumulation number N' of frequency signal；Temporal frequency recorder stops to tested
After the accumulation of the frequency signal of the output of water meter, temporal frequency recorder then stops to by the frequency signal of the output of water gauge
Accumulation, while record accumulation dwell time t2With the accumulation number N of frequency signal.
F) according to the accumulation number N' of the frequency signal by water gauge of temporal frequency recorder record and corresponding accumulation
Time started t'1With end time t'2, the average flow rate in frequency signal accumulated time section by water gauge is calculated by formula (1):
Q=(P × N')/(t'2-t'1) (1)
In formula, Q is the average flow rate in the period accumulated to the frequency signal exported by water gauge；P is water flow
The cumulant for the water that each frequency signal when crossing by water gauge represents.
G) it is opened according to the accumulation number N of the frequency signal of the servo motor of temporal frequency recorder record and corresponding accumulation
Begin time t1With end time t2, the mean flow of the water meter verification standard set-up in frequency signal accumulated time section is calculated by formula (2)
Amount:
Q=π D2ipωN/[4(t2-t1)] (2)
In formula, q is the average flow rate of the water meter verification standard set-up in frequency signal accumulated time section；π is pi；D
For piston cylinder interior diameter；I is the gear ratio of speed reducer；P is guide screw lead；ω is that servo motor (1) receives each frequency letter
Number when the angle that turns over of servo motor (1) rotation axis.
H) error of indication that flow point is examined by water gauge (37) is calculated according to formula (3):
E=(Q-q)/q × 100% (3)
In formula, E is the error of indication that flow point is examined by water gauge.
I) according to by the next checking flow point and its checking time and disk piston of water gauge level run
Distance, judges whether servo motor can continue to rotate in same direction: if can continue to rotate in same direction, repeatedly step e) is extremely
Step h) completes the verification of next flow point；If cannot be further continued for rotating in same direction, step b) is first carried out, then executes
Step d) to step h) completes the verification of next flow point；
J) step i) is repeated to complete to by the verification of other large-capacity points of water gauge.
B. the verification of lower-capacity point
A') according to by the small flow verification flow point and its checking time and disk piston of water gauge level run
Distance, judges whether servo motor can rotate backward: if can rotate backward, thening follow the steps c')~g')；Such as
Fruit cannot rotate backward, and then follow the steps b), then execute step c' again)~g')；
B' step a') is repeated) it completes to by the verification of other lower-capacity points of water gauge.
C' the front-bank rotor housing manual exhaust ball valve, front-bank rotor housing water inlet switch ball valve, rear-bank rotor housing manual exhaust ball) are closed
Valve, rear-bank rotor housing effluent switch ball valve, with switching ball after latus rectum back pressure switch ball valve, discharge pump；Open the front-bank rotor housing
Effluent switch ball valve, front and back cylinder body outlet pipe isolation ball valve, small-bore back pressure switch ball valve, adds rear-bank rotor housing water inlet switch ball valve
Switching ball, pressure pump preceding switch ball valve after water pump；
D') control servo motor reversely accelerates to remain a constant speed after rotating to revolving speed corresponding with required checking flow and turn
It is dynamic, while the driving lead screw after the certain reduction ratio of speed reducer is slowed down that rotates backward of servo motor rotates backward, and passes through silk
Thick stick and feed screw nut, the slidably cooperation between metal support, floating junction, cylinder-piston and disk piston are by the rotation of lead screw
Be converted to moving horizontally for cylinder-piston and disk piston, on the one hand cylinder-piston and disk piston are moved horizontally high-order water
Water in case by rear-bank rotor housing water inlet line and the sucking of rear-bank rotor housing water inlet switch ball valve be located at piston cylinder rear flange, disk piston it
Between water-filling space, on the other hand by the water-filling between piston cylinder inner piston cylinder forward flange, cylinder-piston and disk piston
Water in space is under the promotion of disk piston to be gone out by required checking flow by front-bank rotor housing effluent switch ball valve, front-bank rotor housing
Waterpipe, front and back cylinder body outlet pipe isolation ball valve discharge, by connecting pipe before meter-clamping apparatus preceding switch ball valve, meter-clamping apparatus,
It is meter-clamping apparatus, preceding straight pipe, laggard by water gauge, rear straight pipe, header, small-bore back pressure switch ball valve, small-bore back pressure pipeline
Enter high water tank；While control servo motor reversely accelerates rotation, start pressure pump, it is high-order under pressure pump effect
Water in water tank via switching ball after pressure pump water inlet pipe, pressure pump preceding switch ball valve, pressure pump, pressure pump,
Enter small-bore back pressure pipeline after pressure pump outlet conduit, and high water tank, pressurization are finally flowed by small-bore back pressure pipeline
When the water flow of water pump supply flows into high water tank via small-bore back pressure pipeline, water flow will be produced quickly in small-bore back pressure pipeline
Raw is more than minimum back pressure required when being verified by water gauge, which is sent to by rear straight pipe by water gauge, and final fast
It is more than the minimum back pressure needed for water gauge that speed generates constant in rear straight pipe；It is generated in rear straight pipe and constant is more than
After the minimum back pressure needed for water gauge, temporal frequency recorder starts to accumulate the frequency of driving servo motor rotation,
Recording frequency accumulates time started t simultaneously1；Temporal frequency recorder starts to accumulate the frequency of driving servo motor rotation
After beginning, temporal frequency recorder starts to accumulate to by the frequency signal of the output of water gauge, while recording frequency is accumulated
Time started t'1；When time frequency recorder reaches low-limit frequency signal to by the accumulation of the frequency signal of the output of water gauge
When number, temporal frequency recorder stops to by the accumulation of the frequency signal of the output of water gauge, while when recording accumulation and stopping
Between t'2With the accumulation number N' of frequency signal；Temporal frequency recorder stops to by the tired of the frequency signal of the output of water gauge
After product, temporal frequency recorder then stops to by the accumulation of the frequency signal of the output of water gauge, while recording accumulation and stopping
Time t2With the accumulation number N of frequency signal；
E' step f)) is executed；
F') according to the accumulation number N of the frequency signal of the servo motor (1) of temporal frequency recorder record and corresponding tired
Product time started t1With end time t2, the flat of the water meter verification standard set-up in frequency signal accumulated time section is calculated by formula (4)
Equal flow:
Q=π ip ω N (D2-D1 2)/[4(t2-t1)] (4)
In formula, q is the average flow rate of the water meter verification standard set-up in frequency signal accumulated time section；π is pi；i
For the gear ratio of speed reducer；P is guide screw lead；ω is that servo motor rotation axis turns when servo motor receives each frequency signal
The angle crossed；D is piston cylinder interior diameter；D1For cylinder-piston overall diameter.
G' step h)) is executed.
Beneficial effects of the present invention: i) the piston type device of the double standard types combined using column disk is verified as water meter and is filled
The Main Regulator set: cylinder-piston, disk piston and piston cylinder collectively constitute a column disk combination shape standard, for providing water
Small flow when table verifies；Disk piston and piston cylinder collectively constitute a dish type standard, for providing when water meter verifies
Big flow.Since water-filling space is smaller than water-filling space inside dish type standard inside column disk combination shape standard, cylinder-piston, disk
When shape piston moves certain distance (referred to as at the top of piston cylinder) to piston cylinder forward flange direction, water-filling space is lived by compression discharge
When the volume ratio disk piston of the water of plug cylinder moves (referred to as piston cylinder (18) bottom) same distance to piston cylinder rear flange direction,
Water-filling space is substantially reduced by the volume of the water of compression discharge piston cylinder, therefore column disk combination shape standard can provide water meter school
The small flow needed when testing.Ii small flow verification back pressure system) is used, is generated when for small flow verification by water gauge downstream
Enough back pressures, because of the abnormal problem of work caused by back pressure deficiency when efficiently solving the small flow verification of water meter.
The device and method that the present invention is used for water meter verification, not only realize the verification of water meter, it is often more important that by adopting
With column disk combination shape standard, substantially increase the ability of calibration equipment lower limit measurement, overcome device be difficult to provide water meter it is small
The problem of flow verification；In addition, because of back pressure deficiency bring when small flow back pressure system effectively overcomes water meter small flow verification
Work abnormal problem.
Detailed description of the invention
Fig. 1 is the standard set-up for water meter verification.
Specific embodiment
The present invention to traditional based on Static Volumetric Method, Static mass method and existing piston type liquid flow standard by being filled
The analysis of many limitations for highlighting when water meter verification is set, and combines becoming for liquid flow standard device development of new techniques
Gesture proposes a kind of verification that novel column vitalizes plug calibration device for water meters for water meter, realizes the rapid verification of water meter.
Mentality of designing of the invention: it is respectively as follows: ZL 2,011 1 0339915.1, ZL 2,016 1 by summarizing the patent No.
0120739.1, corresponding patent name is respectively as follows: method, a kind of permanent flow valve stream of a kind of apparatus for calibrating water meter and water meter calibration
The deficiency of the method invention patent of the standard set-up and verification of amount and differential pressure verification, proposes a kind of column disk combination shape standard,
Overcome the problems, such as that device is difficult to provide water meter small flow verification, promotes the ability of calibration equipment lower limit flow measurement.Meanwhile it using
Small flow back pressure system is generating enough back pressures by water gauge downstream when being used for small flow verification, when the small flow verification of water meter
Because of the abnormal problem of back pressure deficiency bring work.
As shown in Figure 1, calibration device for water meters of the invention include as Main Regulator piston type device and peripheral system,
Calibrating installation, compression system, high water tank 50) and exhaust system.Piston type device and peripheral system packet as Main Regulator
Include servo motor 1), speed reducer 2), speed reducer metal support 3), shaft coupling 4), metal support 5 before lead screw), lead screw 6), straight line
Guide rail 7), piston metallic support 8), slidably metal support 9), feed screw nut 10), floating junction 11), cylinder-piston 12), it is preceding
Cylinder body water inlet switch ball valve 13), front-bank rotor housing water inlet line 14), front-bank rotor housing exhaust pipe 15), front-bank rotor housing manual exhaust ball valve
16), piston cylinder forward flange 17), piston cylinder 18), front-bank rotor housing outlet conduit 19), front-bank rotor housing effluent switch ball valve 20), after lead screw
Metal support 21), piston metal support 22), disk piston 23), piston cylinder rear flange 24), rear-bank rotor housing manual exhaust ball valve
25), rear-bank rotor housing exhaust pipe 26), rear-bank rotor housing water inlet line 27), rear-bank rotor housing water inlet switch ball valve 28), rear-bank rotor housing outlet conduit
29), rear-bank rotor housing effluent switch ball valve 30), front and back cylinder body outlet pipe isolation ball valve 31), front and back cylinder body outlet pipe isolation ball valve connect
Adapter tube 32).Calibrating installation includes meter-clamping apparatus preceding switch ball valve 33), connecting pipe 56 before meter-clamping apparatus), meter-clamping apparatus 34), preceding straight tube
Section 35), by water gauge electromechanical transformation apparatus 36), by water gauge 37), rear straight pipe 38), calibrating installation support frame 39), header
40), small-bore back pressure switch ball valve 41), with latus rectum back pressure switch ball valve 42), small-bore back pressure pipeline 43), with latus rectum back pressure
Pipeline 44).Compression system includes pressure pump outlet conduit 45), switching ball 46 after pressure pump), pressure pump 47) plus
Water pump preceding switch ball valve 48), pressure pump water inlet line 49)；Pressure pump outlet pipe 45) pass through tee tube and small-bore back
Pressure pipeline 43) it is fixedly connected.Exhaust system include exhaust water inlet line 51), discharge pump preceding switch ball valve 52), discharge pump
53), switching ball 54 after discharge pump), exhaust outlet conduit 55).
As the cylinder-piston 12 in the piston type device and peripheral system of Main Regulator), piston cylinder forward flange 17), it is living
Plug cylinder 18), disk piston 23), piston cylinder rear flange 24) collectively constitute the piston type devices of double standard types.Cylinder-piston
12), piston cylinder forward flange 17), piston cylinder 18), disk piston 23) collectively constitute a column disk combination shape standard；Column disk knot
Close the piston cylinder forward flange 17 in shape standard) be fixedly mounted on piston cylinder 18) front end, piston cylinder 18) with piston cylinder before method
It is blue 17) between sealed using O-ring seal；Cylinder-piston 12) one end and floating junction 11) be fixedly connected, cylinder-piston 12)
The other end and disk piston 23) be fixedly connected, disk piston 23) be located at piston cylinder 18) in, disk piston 23) and piston cylinder
18) y-type seal ring and guide ring are housed between；Cylinder-piston 12) pass through piston cylinder forward flange 17) centre, a part is located at
Piston cylinder 18) it is external, another part is located at piston cylinder 18) internal, cylinder-piston 12) be located at piston cylinder 18) and internal part with
Piston cylinder 18) between reserve certain water-filling space, cylinder-piston 12) and piston cylinder forward flange 17) between using y-type seal ring
Sealing, y-type seal ring are fixedly mounted on piston cylinder forward flange 17) on；Cylinder-piston 12) front end, middle section and rear end point
Not by floating junction 11), piston cylinder forward flange 17), disk piston 23) support；Piston cylinder 18) it is interior positioned at piston cylinder forward flange
17), cylinder-piston 12) and disk piston 23) between space be water-filling space, when work, cylinder-piston 12), disk piston
23) to piston cylinder forward flange 17) direction moves at the top of (referred to as piston cylinder 18)), piston cylinder 18) in be located at piston cylinder forward flange
17), cylinder-piston 12) and disk piston 23) between space reduce, due to cylinder-piston 12) with piston cylinder forward flange 17) it
Between, disk piston 23) and piston cylinder 18) between be all made of y-type seal ring sealing, then the water in the water-filling space is compressed
Pass through front-bank rotor housing outlet conduit 19 afterwards) discharge piston cylinder 18), piston cylinder 18 is discharged) the volume of water can be according to cylinder-piston 12)
Outer diameter, piston cylinder 18) internal diameter and cylinder-piston 12), disk piston 23) the distance of movement be calculated.Piston cylinder
18), disk piston 23), piston cylinder rear flange 24) collectively constitute a dish type standard.After piston cylinder in dish type standard
Flange 24) be fixedly mounted on piston cylinder 18) rear end, piston cylinder 18) and piston cylinder rear flange 24) between use O-ring seal
Sealing；Dish type standard shape standard in conjunction with column disk shares disk piston 23)；Piston cylinder 18) it is interior positioned at piston cylinder rear flange
24), disk piston 23) between space be water-filling space, when work, disk piston 23) to piston cylinder rear flange 24) direction transports
Dynamic (referred to as piston cylinder 18) bottom), piston cylinder 18) in be located at piston cylinder rear flange 24), disk piston 23) between space subtract
Small, due to disk piston 23) and piston cylinder 18) between be all made of y-type seal ring sealing, then the water in the water-filling space by
Pass through rear-bank rotor housing outlet conduit 29 after compression) discharge piston cylinder 18), piston cylinder 18 is discharged) the volume of water can be according to piston cylinder
18) internal diameter and disk piston 23) the distance of movement be calculated.
In addition, switching ball 46 after pressure pump), pressure pump 47), pressure pump preceding switch ball valve 48), pressure pump
Water inlet pipe 49) composition compression system and small-bore back pressure pipeline 43) and rear straight pipe 38) collectively constitute water meter verification standard fill
The small flow verification back pressure system set.
Small flow verification back pressure system is by water gauge 37) the rear straight pipe 38 in downstream) in generate the method for back pressure, including
Following steps and principle:
I) control rotation to required verification by water gauge 37) lower-capacity point corresponding revolving speed while, open
Pressure pump preceding switch ball valve 48), starting pressure pump 47).
Ii) high water tank 50) in water in pressure pump 47) effect under, via pressure pump water inlet pipe 49), pressure (hydraulic) water
Pump preceding switch ball valve 48), pressure pump 47), switching ball 46 after pressure pump), pressure pump outlet conduit 45) enter afterwards it is small
Bore back pressure pipeline 43), and finally by small-bore back pressure pipeline 43) flow into high water tank 50).
Iii) pressure pump 47) supply water flow via small-bore back pressure pipeline 43) flow into high water tank 50) when, the water
Flow pipeline crushing effect, in small-bore back pressure pipeline 43) in will quickly generate be more than by water gauge 37) verification when it is required
Minimum back pressure, the back pressure pass through rear straight pipe 38) be sent to by water gauge 37).
Iv) pressure pump 47) starting and verification by water gauge 37) lower-capacity point when servo motor 1) reversed acceleration control
System synchronize, and pressure pump 47) supply water flow flow settling time and servo motor 1) reversely accelerate to verification by water gauge
37) the constant rotational speed time corresponding to flow point is shorter, and the two can reach flow equilibrium point in a short time, namely in short-term
It is interior to achieve that small flow verification back pressure system to by water gauge 37) establish constant, enough back pressures.
Wide-range includes the following steps: than the method that the piston cylinder of water meter verification standard set-up is exhausted
1) close the front-bank rotor housing water inlet switch ball valve 13), front-bank rotor housing effluent switch ball valve 20), rear-bank rotor housing water inlet opens
Close ball valve 28) and rear-bank rotor housing effluent switch ball valve 30), opening front-bank rotor housing manual exhaust ball valve 16), rear-bank rotor housing manual exhaust ball valve
25)。
2) control servo motor 1) rotate backward drive speed reducer 2) rotate in same direction, servo motor 1) and rotation through slowing down
Machine 2) slow down after drive lead screw 6) rotate backward, lead screw is rotated backward through lead screw 6) with feed screw nut 10) cooperation turn
Be changed to feed screw nut 10) reversely move horizontally, feed screw nut 10) reversely move horizontally drive slidably metal support 9) make
Reverse sync moves horizontally, slidably metal support 9) reverse sync move horizontally drive floating junction 11) make reverse sync
Move horizontally, floating junction 11) reverse sync move horizontally pull cylinder-piston 12) and disk piston 23) make reverse sync
Move horizontally, until cylinder-piston 12) the other end and disk piston 23) reach piston cylinder 18) top.
3) close the front-bank rotor housing manual exhaust ball valve 16), front-bank rotor housing effluent switch ball valve 20), rear-bank rotor housing water inlet opens
Close ball valve 28) and rear-bank rotor housing effluent switch ball valve 30), open described in front-bank rotor housing water inlet switch ball valve 13) and rear-bank rotor housing it is manual
Venting ball valve 25).
4) control servo motor 1) rotate forward drive speed reducer 2) rotate in same direction, servo motor 1) and rotation through slowing down
Machine 2) slow down after drive lead screw 6) rotate forward, lead screw is rotated forward through lead screw 6) with feed screw nut 10) cooperation turn
Be changed to feed screw nut 10) forward direction move horizontally, feed screw nut 10) forward direction move horizontally drive slidably metal support 9) make
Positive level of synchronization is mobile, slidably metal support 9) positive level of synchronization mobile drive floating junction 11) make it is positive synchronous
Move horizontally, floating junction 11) positive level of synchronization mobile push cylinder-piston 12) and disk piston 23) to make forward direction synchronous
Move horizontally, until cylinder-piston 12) the other end and disk piston 23) reach piston cylinder 18) bottom；In cylinder-piston 12)
With disk piston 23) move horizontally as forward direction during, high water tank 50) in water pass through front-bank rotor housing water inlet line 14) and before
Cylinder body water inlet switch ball valve 13) enter be located at piston cylinder 18) inner piston cylinder forward flange 17), cylinder-piston 12) and disk piston
23) space between is water-filling space；In cylinder-piston 12) and disk piston 23) during moved horizontally as forward direction, be located at and live
Plug cylinder 18) rear flange 24), disk piston 23) between space in air pass through rear-bank rotor housing manual exhaust ball valve 25), rear cylinder
Body exhaust pipe 26) it is discharged except cylinder body.
5) close the rear-bank rotor housing manual exhaust ball valve 25), rear-bank rotor housing effluent switch ball valve 30), front-bank rotor housing water inlet opens
Close ball valve (13) and front-bank rotor housing effluent switch ball valve 20), open described in rear-bank rotor housing water inlet switch ball valve 28), front-bank rotor housing it is manual
Venting ball valve 16).
6) control servo motor 1) rotate backward drive speed reducer 2) rotate in same direction, servo motor 1) and rotation through slowing down
Machine 2) slow down after drive lead screw 6) rotate backward, lead screw is rotated backward through lead screw 6) with feed screw nut 10) cooperation turn
Be changed to feed screw nut 10) reversely move horizontally, feed screw nut 10) reversely move horizontally drive slidably metal support 9) make
Reverse sync moves horizontally, slidably metal support 9) reverse sync move horizontally drive floating junction 11) make reverse sync
Move horizontally, floating junction 11) reverse sync move horizontally pull cylinder-piston 12) and disk piston 23) make reverse sync
Move horizontally, until cylinder-piston 12) the other end and disk piston 23) reach piston cylinder 18) top；In cylinder-piston 12)
With disk piston 23) make reversely move horizontally during, high water tank 50) in water pass through rear-bank rotor housing water inlet line 27), rear cylinder
Body water inlet switch ball valve 28) enter be located at piston cylinder 18) rear flange 24), disk piston 23) between water-filling space；In cylindricality
Piston 12) and disk piston 23) move horizontally as reverse sync during, be located at piston cylinder 18) inner piston cylinder forward flange 17),
Cylinder-piston 12) and disk piston 23) between space in air pass through front-bank rotor housing manual exhaust ball valve 16) and front-bank rotor housing arrange
Feed channel 15) it is discharged except cylinder body.
7) close the front-bank rotor housing manual exhaust ball valve 16), front-bank rotor housing effluent switch ball valve 20), rear-bank rotor housing arranges manually
Balloon valve 25) and rear-bank rotor housing water inlet switch ball valve 28), open the front-bank rotor housing water inlet switch ball valve 13) and rear-bank rotor housing water outlet
Switching ball 30).
8) control servo motor 1) rotate forward drive speed reducer 2) rotate in same direction, servo motor 1) and rotation through slowing down
Machine 2) slow down after drive lead screw 6) rotate forward, lead screw is rotated forward through lead screw 6) with feed screw nut 10) cooperation turn
Be changed to feed screw nut 10) forward direction move horizontally, feed screw nut 10) forward direction move horizontally drive slidably metal support 9) make
Positive level of synchronization is mobile, slidably metal support 9) positive level of synchronization mobile drive floating junction 11) make it is positive synchronous
Move horizontally, floating junction 11) positive level of synchronization mobile push cylinder-piston 12) and disk piston 23) to make forward direction synchronous
Move horizontally, until cylinder-piston 12) the other end and disk piston 23) reach piston cylinder 18) bottom；In cylinder-piston 12)
With disk piston 23) move horizontally as forward direction during, the water in high-order water (50) passes through front-bank rotor housing water inlet line 14) and preceding cylinder
Body water inlet switch ball valve 13) enter be located at piston cylinder 18) inner piston cylinder forward flange 17), cylinder-piston 12) and disk piston 23)
Between space be water-filling space；In cylinder-piston 12) and disk piston 23) during move horizontally as forward direction, it is located at piston
Cylinder 18) rear flange 24), disk piston 23) between water-filling space in water pass through rear-bank rotor housing effluent switch ball valve 30) and rear cylinder
Body outlet conduit 29) discharge, while rear-bank rotor housing effluent switch ball valve 30) and rear-bank rotor housing outlet conduit 29) in air with
The water of discharge flows out together, finally by rear-bank rotor housing effluent switch ball valve 30) and rear-bank rotor housing outlet conduit 29) in air exclude it is dry
Only.
9) close the front-bank rotor housing manual exhaust ball valve 16), front-bank rotor housing water inlet switch ball valve 13), rear-bank rotor housing water outlet opens
Close ball valve 30) and rear-bank rotor housing manual exhaust ball valve 25), open the front-bank rotor housing effluent switch ball valve 20), front and back cylinder body is discharged
Pipe isolation ball valve 31) and rear-bank rotor housing water inlet switch ball valve 28).
10) control servo motor 1) rotate backward drive speed reducer 2) rotate in same direction, servo motor 1) and rotation through subtracting
Fast machine 2) slow down after drive lead screw 6) rotate backward, lead screw is rotated backward through lead screw 6) and feed screw nut 10) cooperation
Be converted to feed screw nut 10) reversely move horizontally, feed screw nut 10) reversely move horizontally drive slidably metal support 9)
Moved horizontally as reverse sync, slidably metal support 9) reverse sync move horizontally drive floating junction 11) make it is reversed same
Step moves horizontally, floating junction 11) reverse sync move horizontally pull cylinder-piston 12) and disk piston 23) make reversely it is same
Step moves horizontally, until cylinder-piston 12) the other end and disk piston 23) reach piston cylinder 18) top；In cylinder-piston
12) and disk piston 23) make reversely move horizontally during, high water tank 50) in water pass through rear-bank rotor housing water inlet line 27),
Rear-bank rotor housing water inlet switch ball valve 28) enter be located at piston cylinder 18) rear flange 24), disk piston 23) between water-filling space；?
Cylinder-piston 12) and disk piston 23) move horizontally as reverse sync during, be located at piston cylinder 18) inner piston cylinder forward flange
17), cylinder-piston 12) and disk piston 23) between space in water pass through front-bank rotor housing effluent switch ball valve 20) and front-bank rotor housing
Outlet conduit 19) discharge, while front-bank rotor housing effluent switch ball valve 20) and front-bank rotor housing outlet conduit 19) in air with row
Water out flows out together, finally by front-bank rotor housing effluent switch ball valve 20), front-bank rotor housing outlet conduit 19) and front and back cylinder body outlet pipe
Air in isolation ball valve (31) excludes clean.
11) step 3), 4), 5), 6) is repeated, by piston cylinder 18) in be located at piston cylinder 18) rear flange 24), dish type it is living
Plug 23) between space in air and be located at piston cylinder 18) inner piston cylinder forward flange 17), cylinder-piston 12) and disk piston
23) air in the space between excludes clean.
Wide-range includes the following steps: than the method that water meter verification standard set-up carries out flow verification to water meter
A. the verification of large-capacity point
A) will be by water gauge 37) it is mounted on the preceding straight pipe 35) and the rear straight pipe 38) between.
B) step 9) is executed, servo motor 1 is controlled) rotate backward drive speed reducer 2) rotate in same direction, servo motor (1)
Rotation through speed reducer 2) slow down after drive lead screw 6) rotate backward, lead screw is rotated backward through lead screw 6) and feed screw nut
10) cooperation is converted to feed screw nut 10) reversely move horizontally, feed screw nut 10) reversely move horizontally drive slidably
Metal support 9) moved horizontally as reverse sync, slidably metal support 9) reverse sync move horizontally drive floating junction
11) moved horizontally as reverse sync, floating junction 11) reverse sync move horizontally pull cylinder-piston 12) and disk piston
23) moved horizontally as reverse sync, until cylinder-piston 12) the other end and disk piston 23) reach piston cylinder 18) top.
C) the front and back cylinder body outlet pipe isolation ball valve 31 is closed) and rear-bank rotor housing effluent switch ball valve 30)；Described in opening
Meter-clamping apparatus preceding switch ball valve 33), small-bore back pressure switch ball valve 41), with latus rectum back pressure switch ball valve 42), before discharge pump
Switching ball 52) and discharge pump after switching ball 54), start discharge pump 53) by rear-bank rotor housing outlet conduit 29), meter-clamping apparatus
Preceding switch ball valve 33), the preceding connecting pipe 56 of meter-clamping apparatus), meter-clamping apparatus 34), preceding straight pipe 35), by water gauge 37), rear straight pipe
38), header 40), small-bore back pressure switch ball valve 41), with latus rectum back pressure switch ball valve 42), small-bore back pressure pipeline 43), it is same
Latus rectum back pressure pipeline 44), exhaust water inlet line 51), discharge pump preceding switch ball valve 52), discharge pump 53), exhaust outlet pipe
Road 55) in air exclude it is clean.
D) close the front-bank rotor housing manual exhaust ball valve 16), front-bank rotor housing effluent switch ball valve 20), the water outlet of front and back cylinder body
Pipe isolation ball valve 31), rear-bank rotor housing manual exhaust ball valve 25), rear-bank rotor housing water inlet switch ball valve 28), switching ball after discharge pump
54), small-bore back pressure switch ball valve 41)；Open the front-bank rotor housing water inlet switch ball valve 13), rear-bank rotor housing effluent switch ball valve
30), meter-clamping apparatus preceding switch ball valve 33), with latus rectum back pressure switch ball valve 42).
E) control servo motor 1) it is positive accelerate rotation to revolving speed corresponding with required checking flow after remain a constant speed
Rotation, while servo motor 1) rotate forward through speed reducer 2) certain reduction ratio drives lead screw 6 after slowing down) rotate forward,
And pass through lead screw 3) with feed screw nut 10), slidably metal support 9), floating junction 11), cylinder-piston 12) and disk piston
23) cooperation between is by lead screw 3) rotation be converted to cylinder-piston 12) and disk piston 23) move horizontally, cylinder-piston
12) and disk piston 23) move horizontally high water tank 50 on the one hand) in water pass through front-bank rotor housing water inlet line 14) and before
Cylinder body water inlet switch ball valve 13) sucking is located at piston cylinder 18) inner piston cylinder forward flange 17), cylinder-piston 12) and disk piston
23) space between is water-filling space, on the other hand will be located at piston cylinder rear flange 24), disk piston 23) between water-filling sky
Between in water in disk piston 23) promotion under with by required checking flow pass through rear-bank rotor housing effluent switch ball valve 30), rear cylinder
Body outlet conduit 29) discharge, by meter-clamping apparatus preceding switch ball valve 33), connecting pipe (56), meter-clamping apparatus 34 before meter-clamping apparatus),
Preceding straight pipe 35), by water gauge 37), rear straight pipe 38), header 40), with latus rectum back pressure switch ball valve 42), with latus rectum back pressure
Pipeline 44) enter high water tank 50 afterwards)；In cylinder-piston 12) and disk piston 23) correspondingly by acceleration level it is mobile switch to it is even
After speed moves horizontally, temporal frequency recorder start to driving servo motor 1) rotation frequency accumulate, while record frequency
Rate accumulates time started t1；In cylinder-piston 12) and disk piston 23) correspondingly switch to constant level's shifting by acceleration level is mobile
After dynamic, temporal frequency recorder starts to by water gauge 37) the frequency signal of output accumulate, while recording frequency is accumulated
Time started t'1；When time frequency recorder is to by water gauge 37) output frequency signal accumulation reach low-limit frequency letter
When number number, temporal frequency recorder stops to by water gauge 37) output frequency signal accumulation, while recording accumulation and stopping
Only time t'2With the accumulation number N' of frequency signal；Temporal frequency recorder stop to by water gauge 37) output frequency letter
Number accumulation after, temporal frequency recorder then stops to by water gauge 37) output frequency signal accumulation, record simultaneously
Accumulate dwell time t2With the accumulation number N of frequency signal.
F) according to temporal frequency recorder record by water gauge 37) the accumulation number N' of frequency signal and corresponding tired
Product time started t'1With end time t'2, by formula (1) calculate frequency signal accumulated time section in by water gauge 37) mean flow
Amount:
Q=(P × N')/(t'2-t'1) (1)
In formula, Q is to by water gauge 37) average flow rate in period for being accumulated of frequency signal of output；P is water
Flow through by water gauge 37) when each frequency signal represent water cumulant.
G) according to the accumulation number N of the frequency signal of the servo motor (1) of temporal frequency recorder record and corresponding tired
Product time started t1With end time t2, the flat of the water meter verification standard set-up in frequency signal accumulated time section is calculated by formula (2)
Equal flow:
Q=π D2ipωN/[4(t2-t1)] (2)
In formula, q is the average flow rate of the water meter verification standard set-up in frequency signal accumulated time section；π is pi；D
For piston cylinder 18) interior diameter；I be speed reducer 2) gear ratio；P is lead screw 6) lead；ω be servo motor 1) receive it is each
Servo motor 1 when frequency signal) angle that turns over of rotation axis.
H) it is calculated according to formula (3) by water gauge 37) it is examined the error of indication of flow point:
E=(Q-q)/q × 100% (3)
In formula, E is by water gauge 37) it is examined the error of indication of flow point.
I) according to by water gauge 37) next checking flow point and its checking time and disk piston 23) it is horizontal
The distance of operation, judges servo motor 1) whether can continue to rotate in same direction: if can continue to rotate in same direction, repeat
Step e) to step h) completes the verification of next flow point；If cannot be further continued for rotating in same direction, step b) is first carried out,
Then the verification that step d) to step h) completes next flow point is executed；
J) step i) is repeated to complete to by water gauge 37) verifications of other large-capacity points.
B. the verification of lower-capacity point
A') according to by water gauge 37) small flow verification flow point and its checking time and disk piston 23) it is horizontal
The distance of operation, judges servo motor 1) whether can rotate backward: if can rotate backward, then follow the steps c')
~g')；If cannot rotate backward, then follow the steps b), then execute step c' again)~g')；
B' step a') is repeated) complete to by water gauge 37) verifications of other lower-capacity points.
C') close the front-bank rotor housing manual exhaust ball valve 16), front-bank rotor housing water inlet switch ball valve 13), rear-bank rotor housing arranges manually
Balloon valve 25), rear-bank rotor housing effluent switch ball valve 30), with latus rectum back pressure switch ball valve 42), switching ball 54 after discharge pump)；
Open the front-bank rotor housing effluent switch ball valve 20), rear-bank rotor housing water inlet switch ball valve 28), front and back cylinder body outlet pipe isolation ball valve
31), small-bore back pressure switch ball valve 41), switching ball 46 after pressure pump), pressure pump preceding switch ball valve 48)；
D' servo motor 1) is controlled) reversely accelerate to remain a constant speed after rotating to revolving speed corresponding with required checking flow
Rotation, while servo motor 1) rotate backward through speed reducer 2) certain reduction ratio drives lead screw 6 after slowing down) rotate backward,
And pass through lead screw 3) with feed screw nut 10), slidably metal support 9), floating junction 11), cylinder-piston 12) and disk piston
23) cooperation between is by lead screw 3) rotation be converted to cylinder-piston 12) and disk piston 23) move horizontally, cylinder-piston
12) and disk piston 23) move horizontally high water tank 50 on the one hand) in water pass through rear-bank rotor housing water inlet line 27) and after
Cylinder body water inlet switch ball valve 28) sucking be located at piston cylinder 18) rear flange 24), disk piston 23) between water-filling space, it is another
Aspect will be located at piston cylinder 18) inner piston cylinder forward flange 17), cylinder-piston 12) and disk piston 23) between water-filling space in
Water in disk piston 23) promotion under to pass through front-bank rotor housing effluent switch ball valve 20 by required checking flow), front-bank rotor housing goes out
Waterpipe 19), front and back cylinder body outlet pipe isolation ball valve 31) discharge, by meter-clamping apparatus preceding switch ball valve 33), before meter-clamping apparatus
Connecting pipe 56), meter-clamping apparatus 34), preceding straight pipe 35), by water gauge 37), rear straight pipe 38), header 40), small-bore back pressure
Switching ball 41), small-bore back pressure pipeline 43) afterwards enter high water tank 50)；Control servo motor 1) reversely accelerate the same of rotation
When, start pressure pump 47), in pressure pump 47) effect under, high water tank 50) in water via pressure pump water inlet pipe
49), pressure pump preceding switch ball valve 48), pressure pump 47), switching ball 46 after pressure pump), pressure pump outlet conduit
45) enter small-bore back pressure pipeline 43 afterwards), and finally by small-bore back pressure pipeline 43) flow into high water tank 50), pressure pump
47) water flow supplied is via small-bore back pressure pipeline 43) flow into high water tank 50) when, water flow is in small-bore back pressure pipeline 43) in
To quickly generate is more than by water gauge 37) verification when required minimum back pressure, which passes through rear straight pipe 38) be sent to it is tested
Water meter 37), and it is final quickly in rear straight pipe 38) in generate constant be more than by water gauge 37) needed for minimum back pressure；Rear
Straight pipe 38) in generate it is constant be more than by water gauge 37) needed for minimum back pressure after, temporal frequency recorder starts to driving
Servo motor 1) rotation frequency accumulated, while recording frequency accumulate time started t1；Temporal frequency recorder starts pair
Driving servo motor 1) rotation frequency carry out accumulation start after, temporal frequency recorder starts to by water gauge 37) output
Frequency signal accumulated, while recording frequency accumulate time started t'1；When time frequency recorder is to by water gauge 37)
The accumulation of frequency signal of output when reaching low-limit frequency signal number, temporal frequency recorder stops to by water gauge 37)
Output frequency signal accumulation, while record accumulation dwell time t'2With the accumulation number N' of frequency signal；Temporal frequency
Recorder stops to by water gauge 37) output frequency signal accumulation after, temporal frequency recorder then stops to tested
Water meter 37) output frequency signal accumulation, while record accumulation dwell time t2With the accumulation number N of frequency signal；
E' step f)) is executed；
F') the servo motor 1 recorded according to temporal frequency recorder) the accumulation number N of frequency signal and corresponding tired
Product time started t1With end time t2, the flat of the water meter verification standard set-up in frequency signal accumulated time section is calculated by formula (4)
Equal flow:
Q=π ip ω N (D2-D1 2)/[4(t2-t1)] (4)
In formula, q is the average flow rate of the water meter verification standard set-up in frequency signal accumulated time section；π is pi；i
For speed reducer 2) gear ratio；P is lead screw 6) lead；ω is servo motor 1) servo motor 1 when receiving each frequency signal)
The angle that rotation axis turns over；D is piston cylinder 18) interior diameter；D1For cylinder-piston 12) overall diameter.
G' step h)) is executed.
Claims (5)
1. a kind of wide-range than water meter verify standard set-up, it is characterised in that: including as Main Regulator piston type device and
Peripheral system, calibrating installation, compression system, high water tank (50) and exhaust system；
Piston type device and peripheral system as Main Regulator include servo motor (1), speed reducer (2), speed reducer metal branch
Seat (3), shaft coupling (4), metal support (5) before lead screw, lead screw (6), linear guide (7), piston metallic support (8), slidably
It is metal support (9), feed screw nut (10), floating junction (11), cylinder-piston (12), front-bank rotor housing water inlet switch ball valve (13), preceding
Cylinder body water inlet line (14), front-bank rotor housing exhaust pipe (15), front-bank rotor housing manual exhaust ball valve (16), piston cylinder forward flange (17),
Metal support (21), piston after piston cylinder (18), front-bank rotor housing outlet conduit (19), front-bank rotor housing effluent switch ball valve (20), lead screw
Metal support (22), disk piston (23), piston cylinder rear flange (24), rear-bank rotor housing manual exhaust ball valve (25), rear-bank rotor housing exhaust
Pipeline (26), rear-bank rotor housing water inlet line (27), rear-bank rotor housing water inlet switch ball valve (28), rear-bank rotor housing outlet conduit (29), rear-bank rotor housing
Effluent switch ball valve (30), front and back cylinder body outlet pipe isolation ball valve (31), front and back cylinder body outlet pipe isolation ball valve connecting tube (32)；
Calibrating installation includes connecting pipe (56), meter-clamping apparatus (34), preceding straight pipe before meter-clamping apparatus preceding switch ball valve (33), meter-clamping apparatus
(35), by water gauge electromechanical transformation apparatus (36), by water gauge (37), rear straight pipe (38), calibrating installation support frame (39), remittance
Manage (40), small-bore back pressure switch ball valve (41), with latus rectum back pressure switch ball valve (42), small-bore back pressure pipeline (43), with logical
Diameter back pressure pipeline (44)；
Compression system includes switching ball (46), pressure pump (47), pressurization after pressure pump outlet conduit (45), pressure pump
Water pump preceding switch ball valve (48), pressure pump water inlet line (49)；Pressure pump outlet pipe (45) by tee tube with it is small-bore
Back pressure pipeline (43) is fixedly connected；
Exhaust system includes exhaust water inlet line (51), discharge pump preceding switch ball valve (52), discharge pump (53), discharge pump
Switching ball (54), exhaust outlet conduit (55) afterwards；
The cylinder-piston (12), piston cylinder forward flange (17), piston cylinder (18), disk piston (23), piston cylinder rear flange
(24) the piston type device of double standard types is collectively constituted；Cylinder-piston (12), piston cylinder forward flange (17), piston cylinder (18),
Disk piston (23) collectively constitutes a column disk combination shape standard；Piston cylinder forward flange (17) in column disk combination shape standard
It is fixedly mounted on the front end of piston cylinder (18), is sealed between piston cylinder (18) and piston cylinder forward flange (17) using O-ring seal；
One end of cylinder-piston (12) is fixedly connected with floating junction (11), and the other end of cylinder-piston (12) and disk piston (23) are solid
Fixed connection, disk piston (23) are located in piston cylinder (18), and y-type seal ring is housed between disk piston (23) and piston cylinder (18)
And guide ring；Cylinder-piston (12) passes through the centre of piston cylinder forward flange (17), and a part is located at piston cylinder (18) outside, another
Part is located at piston cylinder (18) inside, and cylinder-piston (12) is located at pre- between piston cylinder (18) internal part and piston cylinder (18)
Certain water-filling space is stayed, is sealed between cylinder-piston (12) and piston cylinder forward flange (17) using y-type seal ring, the sealing of Y type
Circle is fixedly mounted on piston cylinder forward flange (17)；Front end, middle section and the rear end of cylinder-piston (12) are connect by floating respectively
Head (11), piston cylinder forward flange (17), disk piston (23) support；It is located at piston cylinder forward flange (17), column in piston cylinder (18)
Space between shape piston (12) and disk piston (23) is water-filling space, when work, cylinder-piston (12), disk piston (23)
It is moved to piston cylinder forward flange (17) direction, piston cylinder forward flange (17), cylinder-piston (12) and disk is located in piston cylinder (18)
Space between shape piston (23) reduces, due between cylinder-piston (12) and piston cylinder forward flange (17), disk piston (23)
Y-type seal ring sealing is all made of between piston cylinder (18), then the water in the water-filling space passes through front-bank rotor housing after being compressed
Piston cylinder (18) are discharged in outlet conduit (19), be discharged the water of piston cylinder (18) volume can according to the outer diameters of cylinder-piston (12),
Piston cylinder (18) internal diameter and cylinder-piston (12), the distance of movement of disk piston (23) are calculated；Piston cylinder (18),
Disk piston (23), piston cylinder rear flange (24) collectively constitute a dish type standard；Method after piston cylinder in dish type standard
Blue (24) are fixedly mounted on the rear end of piston cylinder (18), and O-shaped sealing is used between piston cylinder (18) and piston cylinder rear flange (24)
Circle sealing；Dish type standard shape standard in conjunction with column disk shares disk piston (23)；After being located at piston cylinder in piston cylinder (18)
Space between flange (24), disk piston (23) is water-filling space, and when work, disk piston (23) is to piston cylinder rear flange
(24) direction moves, and the space in piston cylinder (18) between piston cylinder rear flange (24), disk piston (23) reduces, due to
Y-type seal ring sealing is all made of between disk piston (23) and piston cylinder (18), then the water in the water-filling space is compressed
Afterwards by rear-bank rotor housing outlet conduit (29) discharge piston cylinder (18), the volume that the water of piston cylinder (18) is discharged can be according to piston cylinder
(18) distance of the movement of internal diameter and disk piston (23) is calculated.
2. a kind of wide-range according to claim 1 verifies standard set-up than water meter, it is characterised in that: the pressure (hydraulic) water
Switching ball (46), pressure pump (47), pressure pump preceding switch ball valve (48), pressure pump water inlet pipe (49) form after pump
Compression system and small-bore back pressure pipeline (43) and rear straight pipe (38) collectively constitute the small flow school of water meter verification standard set-up
Test back pressure system.
3. a kind of small flow verification back pressure system using claim 2 is in by the rear straight pipe (38) in water gauge (37) downstream
The method for generating back pressure, it is characterised in that include the following steps:
I) while control rotation to revolving speed corresponding with the lower-capacity point by water gauge (37) of required verification, pressurization is opened
Water pump preceding switch ball valve (48), starting pressure pump (47)；
Ii) water in high water tank (50) is under pressure pump (47) effect, via pressure pump water inlet pipe (49), pressure pump
Switching ball (46), pressure pump outlet conduit (45) enter afterwards after preceding switch ball valve (48), pressure pump (47), pressure pump
Small-bore back pressure pipeline (43), and high water tank (50) are finally flowed by small-bore back pressure pipeline (43)；
Iii when) water flow of pressure pump (47) supply flows into high water tank (50) via small-bore back pressure pipeline (43), the water flow
In the effect of pipeline crushing, it is more than required when being verified by water gauge (37) for quickly generating in small-bore back pressure pipeline (43)
Minimum back pressure, the back pressure are sent to by rear straight pipe (38) by water gauge (37)；
Iv) starting of pressure pump (47) and verification are controlled by the reversed acceleration of servo motor (1) when water gauge (37) lower-capacity point
System synchronizes, and the flow settling time of pressure pump (47) supply water flow and servo motor (1) reversely accelerate to the tested water of verification
The constant rotational speed time corresponding to table (37) flow point is shorter, and the two can reach flow equilibrium point, Ye Ji in a short time
Achieve that small flow verification back pressure system establishes constant, enough back pressures to by water gauge (37) in short time.
4. a kind of method that the piston cylinder for verifying standard set-up than water meter to wide-range described in claim 1 is exhausted,
It is characterized in that including the following steps:
1) the front-bank rotor housing water inlet switch ball valve (13), front-bank rotor housing effluent switch ball valve (20), rear-bank rotor housing water inlet switch are closed
Ball valve (28) and rear-bank rotor housing effluent switch ball valve (30) open front-bank rotor housing manual exhaust ball valve (16), rear-bank rotor housing manual exhaust ball
Valve (25)；
2) control servo motor (1), which rotates backward, drives speed reducer (2) to rotate in same direction, and the rotation of servo motor (1) is through slowing down
Driving lead screw (6) rotates backward after machine (2) slows down, and lead screw rotates backward matching by lead screw (6) and feed screw nut (10)
Conjunction is converted to reversely moving horizontally for feed screw nut (10), and feed screw nut (10) reversely moves horizontally drive slidably metal branch
Seat (9) is moved horizontally as reverse sync, and slidably the reverse sync of metal support (9), which moves horizontally, drives floating junction (11) to make
Reverse sync moves horizontally, and the reverse sync of floating junction (11), which moves horizontally, pulls cylinder-piston (12) and disk piston (23)
It is moved horizontally as reverse sync, until the other end and disk piston (23) of cylinder-piston (12) reach at the top of piston cylinder (18)；
3) the front-bank rotor housing manual exhaust ball valve (16), front-bank rotor housing effluent switch ball valve (20), rear-bank rotor housing water inlet switch are closed
It is manual to open the front-bank rotor housing water inlet switch ball valve (13) and rear-bank rotor housing for ball valve (28) and rear-bank rotor housing effluent switch ball valve (30)
Venting ball valve (25)；
4) control servo motor (1), which rotates forward, drives speed reducer (2) to rotate in same direction, and the rotation of servo motor (1) is through slowing down
Driving lead screw (6) rotates forward after machine (2) slows down, and lead screw rotates forward matching by lead screw (6) and feed screw nut (10)
The forward direction that conjunction is converted to feed screw nut (10) moves horizontally, and the forward direction of feed screw nut (10) moves horizontally drive slidably metal branch
Seat (9) makees positive level of synchronization movement, and slidably the positive level of synchronization of metal support (9) is mobile drives floating junction (11) to make
Positive level of synchronization is mobile, and the positive level of synchronization of floating junction (11) is mobile to push cylinder-piston (12) and disk piston (23)
It is mobile to make positive level of synchronization, until the other end of cylinder-piston (12) and disk piston (23) arrival piston cylinder (18) bottom；
During cylinder-piston (12) and disk piston (23) are moved horizontally as forward direction, the water in high water tank (50) passes through front-bank rotor housing
Water inlet line (14) and front-bank rotor housing water inlet switch ball valve (13), which enter, is located at piston cylinder (18) inner piston cylinder forward flange (17), cylindricality
Space between piston (12) and disk piston (23) is water-filling space；Make in cylinder-piston (12) and disk piston (23) positive
During moving horizontally, after the air in space between piston cylinder (18) rear flange (24), disk piston (23) passes through
Except cylinder body manual exhaust ball valve (25), rear-bank rotor housing exhaust pipe (26) discharge cylinder body；
5) the rear-bank rotor housing manual exhaust ball valve (25), rear-bank rotor housing effluent switch ball valve (30), front-bank rotor housing water inlet switch are closed
It is manual to open the rear-bank rotor housing water inlet switch ball valve (28), front-bank rotor housing for ball valve (13) and front-bank rotor housing effluent switch ball valve (20)
Venting ball valve (16)；
6) control servo motor (1), which rotates backward, drives speed reducer (2) to rotate in same direction, and the rotation of servo motor (1) is through slowing down
Driving lead screw (6) rotates backward after machine (2) slows down, and lead screw rotates backward matching by lead screw (6) and feed screw nut (10)
Conjunction is converted to reversely moving horizontally for feed screw nut (10), and feed screw nut (10) reversely moves horizontally drive slidably metal branch
Seat (9) is moved horizontally as reverse sync, and slidably the reverse sync of metal support (9), which moves horizontally, drives floating junction (11) to make
Reverse sync moves horizontally, and the reverse sync of floating junction (11), which moves horizontally, pulls cylinder-piston (12) and disk piston (23)
It is moved horizontally as reverse sync, until the other end and disk piston (23) of cylinder-piston (12) reach at the top of piston cylinder (18)；
During cylinder-piston (12) and disk piston (23) are made reversely to move horizontally, the water in high water tank (50) passes through rear-bank rotor housing
Water inlet line (27), rear-bank rotor housing water inlet switch ball valve (28), which enter, is located at piston cylinder (18) rear flange (24), disk piston (23)
Between water-filling space；During cylinder-piston (12) and disk piston (23) are moved horizontally as reverse sync, it is located at piston
The air in space between cylinder (18) inner piston cylinder forward flange (17), cylinder-piston (12) and disk piston (23) passes through preceding cylinder
Except body manual exhaust ball valve (16) and front-bank rotor housing exhaust pipe (15) discharge cylinder body；
7) the front-bank rotor housing manual exhaust ball valve (16), front-bank rotor housing effluent switch ball valve (20), rear-bank rotor housing manual exhaust are closed
Ball valve (25) and rear-bank rotor housing water inlet switch ball valve (28) open the front-bank rotor housing water inlet switch ball valve (13) and rear-bank rotor housing water outlet
Switching ball (30)；
8) control servo motor (1), which rotates forward, drives speed reducer (2) to rotate in same direction, and the rotation of servo motor (1) is through slowing down
Driving lead screw (6) rotates forward after machine (2) slows down, and lead screw rotates forward matching by lead screw (6) and feed screw nut (10)
The forward direction that conjunction is converted to feed screw nut (10) moves horizontally, and the forward direction of feed screw nut (10) moves horizontally drive slidably metal branch
Seat (9) makees positive level of synchronization movement, and slidably the positive level of synchronization of metal support (9) is mobile drives floating junction (11) to make
Positive level of synchronization is mobile, and the positive level of synchronization of floating junction (11) is mobile to push cylinder-piston (12) and disk piston (23)
It is mobile to make positive level of synchronization, until the other end of cylinder-piston (12) and disk piston (23) arrival piston cylinder (18) bottom；
During cylinder-piston (12) and disk piston (23) are moved horizontally as forward direction, the water in high water tank (50) passes through front-bank rotor housing
Water inlet line (14) and front-bank rotor housing water inlet switch ball valve (13), which enter, is located at piston cylinder (18) inner piston cylinder forward flange (17), cylindricality
Space between piston (12) and disk piston (23) is water-filling space；Make in cylinder-piston (12) and disk piston (23) positive
During moving horizontally, the water in water-filling space between piston cylinder (18) rear flange (24), disk piston (23) passes through
Rear-bank rotor housing effluent switch ball valve (30) and rear-bank rotor housing outlet conduit (29) discharge, while rear-bank rotor housing effluent switch ball valve (30)
Flowed out with the air in rear-bank rotor housing outlet conduit (29) with the water of discharge, finally by rear-bank rotor housing effluent switch ball valve (30) and
Air in rear-bank rotor housing outlet conduit (29) excludes clean；
9) the front-bank rotor housing manual exhaust ball valve (16), front-bank rotor housing water inlet switch ball valve (13), rear-bank rotor housing effluent switch are closed
Ball valve (30) and rear-bank rotor housing manual exhaust ball valve (25) open the front-bank rotor housing effluent switch ball valve (20), front and back cylinder body goes out
Water pipe isolation ball valve (31) and rear-bank rotor housing water inlet switch ball valve (28)；
10) control servo motor (1), which rotates backward, drives speed reducer (2) to rotate in same direction, and the rotation of servo motor (1) is through slowing down
Driving lead screw (6) rotates backward after machine (2) slows down, and lead screw rotates backward matching by lead screw (6) and feed screw nut (10)
Conjunction is converted to reversely moving horizontally for feed screw nut (10), and feed screw nut (10) reversely moves horizontally drive slidably metal branch
Seat (9) is moved horizontally as reverse sync, and slidably the reverse sync of metal support (9), which moves horizontally, drives floating junction (11) to make
Reverse sync moves horizontally, and the reverse sync of floating junction (11), which moves horizontally, pulls cylinder-piston (12) and disk piston (23)
It is moved horizontally as reverse sync, until the other end and disk piston (23) of cylinder-piston (12) reach at the top of piston cylinder (18)；
During cylinder-piston (12) and disk piston (23) are made reversely to move horizontally, the water in high water tank (50) passes through rear-bank rotor housing
Water inlet line (27), rear-bank rotor housing water inlet switch ball valve (28), which enter, is located at piston cylinder (18) rear flange (24), disk piston (23)
Between water-filling space；During cylinder-piston (12) and disk piston (23) are moved horizontally as reverse sync, it is located at piston
The water in space between cylinder (18) inner piston cylinder forward flange (17), cylinder-piston (12) and disk piston (23) passes through front-bank rotor housing
Effluent switch ball valve (20) and front-bank rotor housing outlet conduit (19) discharge, while front-bank rotor housing effluent switch ball valve (20) and preceding cylinder
Air in body outlet conduit (19) is flowed out with the water of discharge, finally by front-bank rotor housing effluent switch ball valve (20), front-bank rotor housing
Air in outlet conduit (19) and front and back cylinder body outlet pipe isolation ball valve (31) excludes clean；
11) step 3), 4), 5), 6) is repeated, it is living piston cylinder (18) rear flange (24), dish type will to be located in piston cylinder (18)
It fills in the air in the space between (23) and is located at piston cylinder (18) inner piston cylinder forward flange (17), cylinder-piston (12) and dish type
Air in space between piston (23) excludes clean.
5. a kind of side for carrying out flow verification to water meter than water meter verification standard set-up using wide-range described in claim 1
Method, it is characterised in that include the following steps:
A. the verification of large-capacity point
A) it will be mounted on by water gauge (37) between the preceding straight pipe (35) and the rear straight pipe (38)；
B) step 9) is executed, control servo motor (1), which rotates backward, drives speed reducer (2) to rotate in same direction, servo motor (1)
Rotation driving lead screw (6) after speed reducer (2) slow down rotates backward, and lead screw is rotated backward through lead screw (6) and lead screw spiral shell
The cooperation of female (10) is converted to reversely moving horizontally for feed screw nut (10), feed screw nut (10) reversely move horizontally drive can
Sliding metal support (9) is moved horizontally as reverse sync, and slidably the reverse sync of metal support (9) moves horizontally drive and floats
Connector (11) is moved horizontally as reverse sync, and the reverse sync of floating junction (11), which moves horizontally, pulls cylinder-piston (12) and disk
Shape piston (23) is moved horizontally as reverse sync, until the other end and disk piston (23) of cylinder-piston (12) reach piston cylinder
(18) top；
C) the front and back cylinder body outlet pipe isolation ball valve (31) and rear-bank rotor housing effluent switch ball valve (30) are closed；Described in opening
Meter-clamping apparatus preceding switch ball valve (33), small-bore back pressure switch ball valve (41), with latus rectum back pressure switch ball valve (42), discharge pump before
Switching ball (54) after switching ball (52) and discharge pump starts discharge pump (53) for rear-bank rotor housing outlet conduit (29), folder
Connecting pipe (56) before table device preceding switch ball valve (33), meter-clamping apparatus, meter-clamping apparatus (34), preceding straight pipe (35), by water gauge (37),
Afterwards straight pipe (38), header (40), small-bore back pressure switch ball valve (41), with latus rectum back pressure switch ball valve (42), small-bore back
Pressure pipeline (43), with latus rectum back pressure pipeline (44), exhaust water inlet line (51), discharge pump preceding switch ball valve (52), exhaust water
Pump (53), the air being vented in outlet conduit (55) excludes completely；
D) the front-bank rotor housing manual exhaust ball valve (16), front-bank rotor housing effluent switch ball valve (20), front and back cylinder body outlet pipe are closed
Switching ball after isolation ball valve (31), rear-bank rotor housing manual exhaust ball valve (25), rear-bank rotor housing water inlet switch ball valve (28), discharge pump
(54), small-bore back pressure switch ball valve (41)；Open the front-bank rotor housing water inlet switch ball valve (13), rear-bank rotor housing effluent switch ball
Valve (30), meter-clamping apparatus preceding switch ball valve (33), with latus rectum back pressure switch ball valve (42)；
E) it remains a constant speed and turns after the positive acceleration rotation to revolving speed corresponding with required checking flow of control servo motor (1)
It is dynamic, while driving lead screw (6) after the certain reduction ratio of speed reducer (2) is slowed down that rotates forward of servo motor (1) rotates forward,
And pass through lead screw (3) and feed screw nut (10), slidably metal support (9), floating junction (11), cylinder-piston (12) and dish type
The rotation of lead screw (3) is converted to moving horizontally for cylinder-piston (12) and disk piston (23) by cooperation between piston (23),
Cylinder-piston (12) and moving horizontally for disk piston (23) are on the one hand intake the water in high water tank (50) by front-bank rotor housing
Pipeline (14) and front-bank rotor housing water inlet switch ball valve (13) sucking are located at piston cylinder (18) inner piston cylinder forward flange (17), cylinder-piston
(12) space and between disk piston (23) is water-filling space, on the other hand will be located at piston cylinder rear flange (24), dish type is lived
The water in the water-filling space between (23) is filled under the promotion of disk piston (23) to pass through rear-bank rotor housing by required checking flow
Effluent switch ball valve (30), rear-bank rotor housing outlet conduit (29) discharge, before meter-clamping apparatus preceding switch ball valve (33), meter-clamping apparatus
Connecting pipe (56), meter-clamping apparatus (34), preceding straight pipe (35), by water gauge (37), rear straight pipe (38), header (40), with logical
Diameter back pressure switch ball valve (42) enters high water tank (50) afterwards with latus rectum back pressure pipeline (44)；In cylinder-piston (12) and dish type
After piston (23) correspondingly switchs to constant level's movement by acceleration level is mobile, temporal frequency recorder starts to driving servo electricity
The frequency of machine (1) rotation is accumulated, while recording frequency accumulates time started t1；In cylinder-piston (12) and disk piston
(23) after correspondingly switching to constant level's movement by acceleration level is mobile, temporal frequency recorder starts to by water gauge (37)
The frequency signal of output is accumulated, while recording frequency accumulates time started t'1；When time frequency recorder is to by water gauge
(37) when the accumulation of the frequency signal of output reaches low-limit frequency signal number, temporal frequency recorder stops to by water gauge
(37) accumulation of the frequency signal of output, while recording accumulation dwell time t'2With the accumulation number N' of frequency signal；Time
Frequency recorder stops to by after the accumulation of the frequency signal of the output of water gauge (37), and temporal frequency recorder then stops pair
By the accumulation of the frequency signal of the output of water gauge (37), while recording accumulation dwell time t2With the accumulation number of frequency signal
N；
F) according to the accumulation number N' of the frequency signal by water gauge (37) of temporal frequency recorder record and corresponding accumulation
Time started t'1With end time t'2, the mean flow in frequency signal accumulated time section by water gauge (37) is calculated by formula (1)
Amount:
Q=(P × N')/(t'2-t'1) (1)
In formula, Q is the average flow rate in the period accumulated to the frequency signal exported by water gauge (37)；P is water flow
The cumulant for the water that each frequency signal when crossing by water gauge (37) represents；
G) it is opened according to the accumulation number N of the frequency signal of the servo motor (1) of temporal frequency recorder record and corresponding accumulation
Begin time t1With end time t2, the mean flow of the water meter verification standard set-up in frequency signal accumulated time section is calculated by formula (2)
Amount:
Q=π D2ipωN/[4(t2-t1)] (2)
In formula, q is the average flow rate of the water meter verification standard set-up in frequency signal accumulated time section；π is pi；D is to live
Plug cylinder (18) interior diameter；I is the gear ratio of speed reducer (2)；P is lead screw (6) lead；ω receives each for servo motor (1)
The angle that servo motor (1) rotation axis turns over when frequency signal；
H) error of indication that flow point is examined by water gauge (37) is calculated according to formula (3):
E=(Q-q)/q × 100% (3)
In formula, E is the error of indication that flow point is examined by water gauge (37)；
I) according to by the next checking flow point and its checking time and disk piston (23) of water gauge (37), level is transported
Capable distance, judges whether servo motor (1) can continue to rotate in same direction: if can continue to rotate in same direction, repeating
Step e) to step h) completes the verification of next flow point；If cannot be further continued for rotating in same direction, step b) is first carried out,
Then the verification that step d) to step h) completes next flow point is executed；
J) step i) is repeated to complete to by the verification of water gauge (37) other large-capacity points；
B. the verification of lower-capacity point
A') according to by the small flow verification flow point and its checking time and disk piston (23) of water gauge (37), level is transported
Capable distance, judges whether servo motor (1) can rotate backward: if can rotate backward, thening follow the steps c')~
g')；If cannot rotate backward, then follow the steps b), then execute step c' again)~g')；
B' step a') is repeated) it completes to by the verification of water gauge (37) other lower-capacity points；
C' the front-bank rotor housing manual exhaust ball valve (16), front-bank rotor housing water inlet switch ball valve (13), rear-bank rotor housing manual exhaust) are closed
Ball valve (25), rear-bank rotor housing effluent switch ball valve (30), with switching ball after latus rectum back pressure switch ball valve (42), discharge pump
(54)；Open the front-bank rotor housing effluent switch ball valve (20), rear-bank rotor housing water inlet switch ball valve (28), front and back cylinder body outlet pipe every
From switching ball (46), pressure pump preceding switch ball valve after ball valve (31), small-bore back pressure switch ball valve (41), pressure pump
(48)；
D') control servo motor (1) reversely accelerates to remain a constant speed after rotating to revolving speed corresponding with required checking flow to turn
It is dynamic, while driving lead screw (6) after the certain reduction ratio of speed reducer (2) is slowed down that rotates backward of servo motor (1) rotates backward,
And pass through lead screw (3) and feed screw nut (10), slidably metal support (9), floating junction (11), cylinder-piston (12) and dish type
The rotation of lead screw (3) is converted to moving horizontally for cylinder-piston (12) and disk piston (23) by cooperation between piston (23),
Cylinder-piston (12) and moving horizontally for disk piston (23) are on the one hand intake the water in high water tank (50) by rear-bank rotor housing
Pipeline (27) and rear-bank rotor housing water inlet switch ball valve (28) sucking are between piston cylinder (18) rear flange (24), disk piston (23)
Water-filling space, on the other hand will be located at piston cylinder (18) inner piston cylinder forward flange (17), cylinder-piston (12) and disk piston
(23) water in water-filling space between is under the promotion of disk piston (23) to be gone out by required checking flow by front-bank rotor housing
Taps ball valve (20), front-bank rotor housing outlet conduit (19), front and back cylinder body outlet pipe isolation ball valve (31) discharge, by tong-test ammeter
Connecting pipe (56) before device preceding switch ball valve (33), meter-clamping apparatus, meter-clamping apparatus (34), preceding straight pipe (35), by water gauge (37), after
Straight pipe (38), header (40), small-bore back pressure switch ball valve (41), small-bore back pressure pipeline (43) enter high water tank afterwards
(50)；While control servo motor (1) reversely accelerates rotation, start pressure pump (47), in the case where pressure pump (47) act on,
Water in high water tank (50) via pressure pump water inlet pipe (49), pressure pump preceding switch ball valve (48), pressure pump (47),
After pressure pump switching ball (46), pressure pump outlet conduit (45) afterwards enter small-bore back pressure pipeline (43), and finally by
Small-bore back pressure pipeline (43) flows into high water tank (50), and the water flow of pressure pump (47) supply is via small-bore back pressure pipeline
(43) when flowing into high water tank (50), it is more than by water gauge (37) school that water flow will be generated quickly in small-bore back pressure pipeline (43)
Required minimum back pressure when testing, the back pressure are sent to by rear straight pipe (38) by water gauge (37), and final quickly rear straight
Generating constant in pipeline section (38) is more than the minimum back pressure needed for water gauge (37)；It is generated in rear straight pipe (38) constant
After the minimum back pressure needed for water gauge (37), temporal frequency recorder starts the frequency to driving servo motor (1) rotation
Rate is accumulated, while recording frequency accumulates time started t1；Temporal frequency recorder starts to driving servo motor (1) rotation
Frequency carry out accumulation start after, temporal frequency recorder starts tired to being carried out by the frequency signal of the output of water gauge (37)
Product, while recording frequency accumulates time started t'1；When time frequency recorder is to by the frequency signal of the output of water gauge (37)
Accumulation when reaching low-limit frequency signal number, temporal frequency recorder stops to by the frequency signal of the output of water gauge (37)
Accumulation, while record accumulation dwell time t'2With the accumulation number N' of frequency signal；Temporal frequency recorder stops to tested
After the accumulation of the frequency signal of the output of water meter (37), temporal frequency recorder then stops to by the output of water gauge (37)
The accumulation of frequency signal, while recording accumulation dwell time t2With the accumulation number N of frequency signal；
E' step f)) is executed；
F' it) is opened according to the accumulation number N of the frequency signal of the servo motor (1) of temporal frequency recorder record and corresponding accumulation
Begin time t1With end time t2, the mean flow of the water meter verification standard set-up in frequency signal accumulated time section is calculated by formula (4)
Amount:
Q=π ip ω N (D2-D1 2)/[4(t2-t1)] (4)
In formula, q is the average flow rate of the water meter verification standard set-up in frequency signal accumulated time section；π is pi；I is to subtract
The gear ratio of fast machine (2)；P is lead screw (6) lead；ω is servo motor (1) when servo motor (1) receives each frequency signal
The angle that rotation axis turns over；D is piston cylinder (18) interior diameter；D1For cylinder-piston (12) overall diameter；
G' step h)) is executed.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116164881A (en) * | 2022-12-17 | 2023-05-26 | 廊坊西波尔钻石技术有限公司 | Calibration system and calibration method of barometric instrument |
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