CN203083666U - Water meter verification device - Google Patents
Water meter verification device Download PDFInfo
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- CN203083666U CN203083666U CN 201220587326 CN201220587326U CN203083666U CN 203083666 U CN203083666 U CN 203083666U CN 201220587326 CN201220587326 CN 201220587326 CN 201220587326 U CN201220587326 U CN 201220587326U CN 203083666 U CN203083666 U CN 203083666U
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- piston
- water meter
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Abstract
The utility model relates to a water meter verification device. The device comprises a power driving mechanism (1), and a piston system (2) connected with the power driving mechanism (1) and capable of reciprocating under the driving of the power driving mechanism (1), wherein the water outlet of the piston system (2) is connected with a to-be-verified water meter (4) through a water outlet valve (3); and the outlet of the to-be-verified water meter (4) is connected with a water tank (5) connected with the piston system (2) through a water inlet valve (7). The device further comprises a reading device (8), and a control device (9) connected with the power driving mechanism (1), the water outlet valve (3) and the reading device (8). Compared with the prior art, the control device drives the piston system under the driving of the power driving mechanism, so that the piston system generates a standard water flow to flow through the to-be-verified water meter, and the water flow is an actively generated standard value; and additional water pump and pressure stabilizing equipment are not required, and the water pressure is table during the whole test process.
Description
Technical field
The utility model relates to a kind of water meter calibration device.
Background technology
The small diameter watermeter determinator is a kind of of water flow standard apparatus, the configuration of its accuracy, test section installation requirement and standard tolerance is disposed by user's water meter, bore satisfies the following water meter of DN25, generally adopts the start and stop method, and water meter and standard are by artificial copy reading.
Because the flow range degree Q of domestic meter
3/ Q
1Generally can reach 100, than big many of general flowmeter, metering performance under the low discharge is poured into water meter in the family morely simultaneously, and flow Q demarcates
2With minimum flow Q
1Value all smaller.When calibrating and factory inspection first, water meter national metrological verification regulations and national standard all require these flow points are carried out error of indication calibrating.During the calibrating of start and stop method, for eliminating the combined type inertia effects, calibrating water consumption regulation is not less than 200 times of calibrating scale division value.Be subjected to the restriction of water meter calibration scale division value design, for reaching the uncertainty of measurement requirement of legal system metering, boundary flow Q
2With Q under the minimum flow
1The calibrating time can be very long, add stable level time, reading duration and the control time of discharging water of standard, and the switchings of three calibrating flow points do not have continuity, present manufacturing enterprise and water meter calibration station are very low to the calibration operation efficient of small diameter watermeter.For a long time, domestic water meter manufacturing enterprise and water meter calibration station adopt the series connection inspection to show to address this problem to a certain extent, tandem start and stop method volumetric water meter calibrating installation is a kind ofly typically to use product, and class of accuracy is 0.2 grade, and standard is one group of work measuring instrument that the amount limit varies in size.The device operating feature is: manually before and after the test water meter and the standard of stablizing after static carried out reading, it is independent and discontinuous that the error of indication of each flow point is examined and determine.
Analyze present existing water meter calibration device and method, there are several problems in the handy aspect of its work efficiency and efficiency:
1, Chang Gui water meter calibration device will be flowed through with collecting method and be focused in work measuring instrument or the scale by the water of water gauge, and the value of work measuring instrument or scale is exactly the normal stream value, and this is a kind of standard value of calculating, passive generation afterwards;
2, the calibrating time long, with DN15, Q
3=2.5, Q
3/ Q
1=100 water meter is an example, and the calibrating under the minimum flow needs 20 fens kinds at least, calibrating minimum flow Q
1, boundary flow Q
2, flow Q commonly used
3About 43 minutes of the pure calibrating time of three flow points; The non-calibrating time also needs time a few minutes, and this time comprises set-up time, circulation evacuation time, water meter start and stop reading duration, calibrating flow point switching time;
3, the water meter calibration device of routine container voltage stabilizing method or overflow voltage stabilizing method, this is the method for the special voltage stabilizing equipment of a kind of needs, in order to obtain voltage regulation result and test pressure, energy utilization rate is not high, needs bigger pond or water tank simultaneously yet;
4, Chang Gui water meter calibration device is artificial reading to water meter, and the copy reading automaticity is low, labour intensity is high, inefficiency;
5, Chang Gui water meter calibration device generally is a dwell type to the switching of water meter calibration point, comprises that exhaust also is like this; This is because the reading of standard needs static state to read, even dynamic calibration so also can be stablized a period of time.
Low like this work efficiency causes some calibrating stations and water meter factory to buy a large amount of water meter series connection table apparatus, has blindly in calibrating and verification work and reduces the water consumption behavior, is emitting the risk of measuring misalignment to keep production efficiency and calibrating efficient.In recent years, be becoming tight human resources day, cost rises, calibrating employee's the instability and the growth of expense have more aggravated this phenomenon.
From the nineties in last century, each enterprise has carried out design and has changed on the basis of the unified design type in the water meter whole nation, formed the various product of pattern.Because the design of domestic water meter product and production, assembling, calibration equipment is not to carry out simultaneously, take into account each other, so calibrating installation and calibrating mode universal, poor efficiency do not obtain radical change.
Flow meter calibration or calibrating method of standard table commonly used are the effective ways that improve the water meter verification, the method of the dual-time method principle that domestic partial devices adopts has improved the calibrating efficient of water meter, but because the flow range broad of water meter, the pattern of standard scale is selected and stability also is a difficult problem.
The utility model content
Technical problem to be solved in the utility model is to provide a kind of at above-mentioned prior art and can initiatively produce the flow standard value, do not need to dispose water pump and pressure stabilizing device, the higher water meter calibration device of energy utilization rate.
The utility model solves the problems of the technologies described above the technical scheme that is adopted: this water meter calibration device is characterized in that: comprise
Power-driven mechanism;
Be connected with power-driven mechanism, can be under power-driven mechanism drives reciprocating piston system;
The water delivering orifice of piston system connects the water inlet of an outlet valve, the water delivering orifice of this outlet valve by first pipeline with linked to each other by water gauge, comprised many by water gauge, and mutual serial connection;
Last is linked to each other with the water inlet of tank by second pipeline by the outlet of water gauge, and the water delivering orifice of tank connects the water inlet of filtrator, and the water delivering orifice of filtrator connects the water inlet of water intaking valve, and the water delivering orifice of water intaking valve links to each other with the water inlet of piston system;
Be used to read the reading device of tested meter reading;
Control device, with power-driven mechanism, outlet valve, water intaking valve, reading device links to each other, preserve the systematic parameter of described piston system in this control device, can export corresponding power control signal to of the to-and-fro movement of described power-driven mechanism according to detecting the flow needs with the driven plunger system, simultaneously can also calculate the normal stream value of flowing through according to the operational factor of power-driven mechanism and the systematic parameter of described piston system by water gauge, the reading that this normal stream value and reading device are read compares then, and the difference of the reading that normal stream value that control device calculates and reading device read is by the error of indication of water gauge.
As improvement, described second pipeline is provided with the pipeline transfer valve.
Existing water meter calibration device generally is a dwell type to the switching of water meter calibration point, comprises that exhaust also is like this.This is because the reading of standard needs static state to read, even dynamic calibration so also can be stablized a period of time.The utility model second pipeline is provided with the pipeline transfer valve, is continous way to the switching of flow point, and promptly a spot check switches to another calibrating flow point after intact immediately, as long as control device control power-driven mechanism is waited for necessary stabilization time.In addition, the utility model is owing to be active generation normal flow, so can be in the effective travel volume of piston system by function software, configure evacuation time and flow, configure test flow point, test number (TN) and stabilization time at interval, just realize automatically finishing the error of indication of whole flow points of water meter and examine and determine or needed test.
Improve again, on described second pipeline flow control valve is set.
Improve, described second pipeline is provided with suspended body flowmeter again.
Improve again, many are arranged on the same detection platform by water gauge, described reading device comprises the elevating lever that can rise and descend that is arranged on described detection platform one side under external force drives, be movably set with on this elevating lever a plurality of respectively with many by the corresponding universal sampling cover of water gauge, be provided with photoelectric sensor in this universal sampling cover.
The utility model has adopted elevating lever and universal sampling cover to the reading of series connection water meter, can be fast, simultaneously, exactly the photoelectric sensor corresponding with the series connection water meter fallen the efficiently sampling zone, can not be subjected to water meter processing consistance and the bad influence of levelness is installed.Copy reading automaticity height has effectively improved work efficiency.
As preferably, described power-driven mechanism comprises stepper motor and reductor.Belong to the positive displacement principle of work with stepper motor and reductor driven plunger system, fltting speed multiply by operation and is standard volume interval time, and principle is simple and reliable.For solving thrust and the pressure stability under the maximum test flow 5m3/h, the utility model has disposed reductor, guarantees the stable of maximum test flow, has also controlled the noise of device running simultaneously.
Improve again, first water inlet by water gauge is provided with first temperature sensor and first pressure transducer, last water delivering orifice place by water gauge is provided with second temperature sensor and second pressure transducer, and first temperature sensor, first pressure transducer, second temperature sensor and second pressure transducer all link to each other with described control device.
Described piston system comprises: piston cylinder, and sealing is movably arranged on the piston in the piston cylinder, and with the screw mandrel that the power-driven mechanism output shaft is connected, screw mandrel is connected with piston.
Piston system is the vitals in the utility model device, can determine the diameter and the length of piston cylinder according to the parameter of flow range and stepper motor.Piston cylinder and piston also should be heat-treated after car system, and correct grinding, chromium plating, accurate measurement guarantee that like this piston cylinder and piston long period of soaking are indeformable in water, are not subjected to aqueous corrosion.The diameter of piston system gamut differs in 2/10000ths with the three-coordinate instrument test.Adopt double-layer seal between piston and piston cylinder, good reliability.
As improvement, be connected a side with piston on the described piston cylinder and be provided with the leakage monitoring hole, can supply visual monitoring, connect a relative side with piston on the described piston cylinder and be provided with vent port.
Preferably, described control device comprises a PLC controller and the display that links to each other with the PLC controller, also can be a computing machine with display screen.
Compared with prior art, advantage of the present utility model is:
1, in the utility model, control device is by power-driven mechanism driven plunger system, and the current that make piston system produce normal flow pass through by water gauge, and this is the standard value that a kind of active produces;
2, the current of normal flow rely on power-driven mechanism to produce, no longer need other water pump and pressure stabilizing device, water pressure invariableness in the entire test, test hydraulic pressure is selected arbitrarily in a scope according to the pressure loss and the operation valve of series connection water meter, (0.03～1) the MPa scope that can meet the norm standard regulation, and the water yield that the water in the tank only need be a bit larger tham the active volume of piston system gets final product, so tank can be very little, also is convenient to do some water temperature control measure.
Description of drawings
Fig. 1 is the structure principle chart of water meter calibration device in the embodiment of the invention.
Fig. 2 is the structural representation (elevating lever decline state) of detection platform and reading device in the embodiment of the invention;
Fig. 3 is the structural representation (elevating lever propradation) of detection platform and reading device in the embodiment of the invention.
Embodiment
Embodiment describes in further detail the utility model below in conjunction with accompanying drawing.
Water meter calibration device as shown in Figure 1, it comprises
Power-driven mechanism 1, this power-driven mechanism 1 comprises stepper motor and reductor;
1 that be connected with power-driven mechanism, can be under power-driven mechanism 1 drives reciprocating piston system 2, piston system 2 comprises: piston cylinder 21, sealing is movably arranged on the piston 22 in the piston cylinder 21, the screw mandrel 23 that is connected with power-driven mechanism 1 output shaft, screw mandrel 23 is connected with piston 22, be connected a side with piston 22 on the piston cylinder 21 and be provided with leakage monitoring hole 24, connect a relative side with piston 22 on the described piston cylinder 21 and be provided with vent port 25;
The water delivering orifice of piston system 2 connects the water inlet of an outlet valve 3, the water delivering orifice of this outlet valve 3 by first pipeline with linked to each other by water gauge 4, comprised many by water gauge, and mutual serial connection, had 10 by water gauge in the present embodiment, many are arranged on the same detection platform 17 by water gauge;
Last is linked to each other with the water inlet of tank 5 by second pipeline by the outlet of water gauge, the water delivering orifice of tank 5 connects the water inlet of filtrator 6, the water delivering orifice of filtrator 6 connects the water inlet of water intaking valve 7, and the water delivering orifice of water intaking valve 7 links to each other with the water inlet of piston system 2; Second pipeline is provided with pipeline transfer valve 10, flow control valve 11, suspended body flowmeter 12, and pipeline transfer valve 10, flow control valve 11, suspended body flowmeter 12 all are connected with control device 9;
In the present embodiment, the water inlet of piston system 2 and water delivering orifice are same;
Be used to read reading device 8 by water gauge 4 readings, described reading device 8 comprises the elevating lever 81 that can rise and descend that is arranged on described detection platform 17 1 sides under external force drives, be movably set with on this elevating lever 81 a plurality of respectively with many by the corresponding universal sampling cover 82 of water gauge, universal sampling cover 82 can be done universal adjustment along elevating lever 81 under external force drives, be provided with photoelectric sensor 83 in this universal sampling cover 82; Referring to shown in Figure 2;
Control device 9, control device 9 comprises a PLC controller and the display that links to each other with the PLC controller, with power-driven mechanism 1, outlet valve 3, water intaking valve 7, reading device 8 links to each other, the systematic parameter of preserving described piston system 2 in this control device 9, can export corresponding power control signal to of the to-and-fro movement of described power-driven mechanism 1 according to detecting the flow needs with driven plunger system 2, simultaneously can also calculate the normal stream value of flowing through according to the operational factor of power-driven mechanism 1 and the systematic parameter of described piston system 2 by water gauge 4, the reading that this normal stream value and reading device 8 are read compares then, and the difference of the reading that normal stream value that control device 9 calculates and reading device 8 read is by the error of indication of water gauge 4.
In addition, 10 by in the water gauge, first water inlet by water gauge is provided with first temperature sensor 13 and first pressure transducer 14, last water delivering orifice place by water gauge is provided with second temperature sensor 15 and second pressure transducer, 16, the first temperature sensors 13, first pressure transducer 14, second temperature sensor 15 all link to each other with described control device 9 with second pressure transducer 16.
The method of said apparatus calibrating water meter is: control device 9 is exported corresponding power control signal to the to-and-fro movement of described power-driven mechanism 1 with driven plunger system 2 according to detecting the flow needs, simultaneously calculate the normal stream value of flowing through by water gauge 4 according to the operational factor of power-driven mechanism 1 and the systematic parameter of described piston system 2, the reading that this normal stream value and reading device 8 are read compares then, and the difference of the reading that normal stream value that control device 9 calculates and reading device 8 read is by the error of indication of water gauge 4.
Concrete is operating as: before the calibrating, water in the tank 5 flows in the inner chamber of piston cylinder after filtering through filter 6, configures all flow checkpoints under effective travel of piston, verification water consumption, flow point switching stabilization time, exhaust (beginning current stabilization) volume in control device 9.After on-test, control device 9 is pressed parameters such as piston cylinder diameter, the instruction step motor drives the screw mandrel rotation with a certain speed (being flow), screw mandrel rotation driven plunger travels forward, the volume of piston advances forward " squeezes " water that goes out, flow through by water gauge (connect 10, series connection quantity is limit with the device length overall according to the pressure loss and decided), the plum blossom pointer that meter reading is aimed at indication initiating flow by photoelectric sensor (can select fiber sensor or laser sensor) is read.When test volume reaches default volume number (umber of pulse of corresponding plum blossom pointer), the volume of corresponding piston motion is to multiply by throw of poston speed the corresponding time to obtain the normal stream value, the reading that this normal stream value and reading device are read compares, the difference of the reading that normal stream value that control device calculates and reading device read is by the error of indication of water gauge, and shows the error of indication of each position water meter under first flow point by display screen; Switch to next flow point then, after reaching stabilization time, begin verification, repeat above process, moved its useful volume, finish calibrating or verification that all set flow point until piston.
State parameters such as control device instant recording stepper motor rotating speed, time can obtain the normal stream value by set calculated with mathematical model, umber of pulse by the measured water meter of photoelectric sensor multiply by the volume that the gear ratio coefficient obtains water meter, and both compare the error of indication that obtains water meter.
Claims (10)
1. a water meter calibration device is characterized in that: comprise
Power-driven mechanism (1);
Be connected with power-driven mechanism (1), can be under power-driven mechanism (1) drives reciprocating piston system (2);
The water delivering orifice of piston system (2) connects the water inlet of an outlet valve (3), and the water delivering orifice of this outlet valve (3) passes through first pipeline and linked to each other by water gauge (4), is comprised many by water gauge, and is connected in series mutually;
Last is linked to each other with the water inlet of tank (5) by second pipeline by the outlet of water gauge, the water delivering orifice of tank (5) connects the water inlet of filtrator (6), the water delivering orifice of filtrator (6) connects the water inlet of water intaking valve (7), and the water delivering orifice of water intaking valve (7) links to each other with the water inlet of piston system (2);
Be used to read reading device (8) by water gauge (4) reading;
Control device (9), with power-driven mechanism (1), outlet valve (3), water intaking valve (7), reading device (8) links to each other, preserve the systematic parameter of described piston system (2) in this control device (9), can export corresponding power control signal to the to-and-fro movement of described power-driven mechanism (1) according to detecting the flow needs with driven plunger system (2), simultaneously can also calculate the normal stream value of flowing through according to the operational factor of power-driven mechanism (1) and the systematic parameter of described piston system (2) by water gauge (4), the reading that this normal stream value and reading device (8) are read compares then, and the difference of the reading that normal stream value that control device (9) calculates and reading device (8) read is by the error of indication of water gauge (4).
2. water meter calibration device according to claim 1 is characterized in that: described second pipeline is provided with pipeline transfer valve (10).
3. water meter calibration device according to claim 1 is characterized in that: flow control valve (11) is set on described second pipeline.
4. water meter calibration device according to claim 1 is characterized in that: described second pipeline is provided with suspended body flowmeter (12).
5. water meter calibration device according to claim 1, it is characterized in that: many are arranged on the same detection platform by water gauge, described reading device (8) comprises the elevating lever (81) that can rise and descend that is arranged on described detection platform one side under external force drives, be movably set with on this elevating lever (81) a plurality of respectively with many by the corresponding universal sampling cover of water gauge (82), be provided with photoelectric sensor (83) in this universal sampling cover (82).
6. water meter calibration device according to claim 1 is characterized in that: described power-driven mechanism (1) comprises stepper motor and reductor.
7. water meter calibration device according to claim 1, it is characterized in that: first water inlet by water gauge is provided with first temperature sensor (13) and first pressure transducer (14), last water delivering orifice place by water gauge is provided with second temperature sensor (15) and second pressure transducer (16), and first temperature sensor (13), first pressure transducer (14), second temperature sensor (15) and second pressure transducer (16) all link to each other with described control device (9).
8. according to the described water meter calibration device of any claim in the claim 1～7, it is characterized in that: described piston system (2) comprising: piston cylinder (21), sealing is movably arranged on the piston (22) in the piston cylinder (21), with the screw mandrel (23) that power-driven mechanism (1) output shaft is connected, screw mandrel (23) is connected with piston (22).
9. water meter calibration device according to claim 8, it is characterized in that: upward be connected a side with piston (22) is provided with leakage monitoring hole (24) to described piston cylinder (21), and described piston cylinder (21) is gone up a side relative with piston (22) connection and is provided with vent port (25).
10. water meter calibration device according to claim 1 is characterized in that: described control device (9) comprises a PLC controller and the display that links to each other with the PLC controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220587326 CN203083666U (en) | 2012-11-08 | 2012-11-08 | Water meter verification device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220587326 CN203083666U (en) | 2012-11-08 | 2012-11-08 | Water meter verification device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203083666U true CN203083666U (en) | 2013-07-24 |
Family
ID=48829491
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220587326 Expired - Fee Related CN203083666U (en) | 2012-11-08 | 2012-11-08 | Water meter verification device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203083666U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102914349A (en) * | 2012-11-08 | 2013-02-06 | 宁波东海仪表水道有限公司 | Water meter verification device and method |
| CN110057427A (en) * | 2019-03-04 | 2019-07-26 | 天津大学 | A kind of calibrating flow point of apparatus for calibrating water meter is switched fast steady flow system |
-
2012
- 2012-11-08 CN CN 201220587326 patent/CN203083666U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102914349A (en) * | 2012-11-08 | 2013-02-06 | 宁波东海仪表水道有限公司 | Water meter verification device and method |
| CN110057427A (en) * | 2019-03-04 | 2019-07-26 | 天津大学 | A kind of calibrating flow point of apparatus for calibrating water meter is switched fast steady flow system |
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|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130724 Termination date: 20181108 |
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| CF01 | Termination of patent right due to non-payment of annual fee |