CN202885920U - Water supply mechanism for water meter testing - Google Patents
Water supply mechanism for water meter testing Download PDFInfo
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- CN202885920U CN202885920U CN 201220591137 CN201220591137U CN202885920U CN 202885920 U CN202885920 U CN 202885920U CN 201220591137 CN201220591137 CN 201220591137 CN 201220591137 U CN201220591137 U CN 201220591137U CN 202885920 U CN202885920 U CN 202885920U
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- water inlet
- driven mechanism
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Abstract
The utility model relates to a water supply mechanism for water meter testing. The water supply mechanism for the water meter testing is characterized by comprising a power drive mechanism (1) and a piston system (2), wherein the piston system (2) is connected with the power drive mechanism (1) and capable of conducting reciprocating motion driven by the power drive mechanism (1), a water outlet of the piston system (2) is connected with a water inlet of a water outlet valve (3), a water outlet of the water outlet valve (3) is connected with a water meter to be tested (4) through a first pipeline, an outlet of the water meter to be tested is connected with a water inlet of a water groove (5), a water outlet of the water groove (5) is connected with a water inlet of a filter (6), a water outlet of the filter (6) is connected with a water inlet of a water inlet valve (7), a water outlet of the water inlet valve (7) is connected with the water inlet of the piston system (2), a control device (9) is connected with the power drive mechanism (1), the water outlet valve (3) and the water inlet valve (7), and used for outputting a control signal of corresponding power to the power drive mechanism (1) so that the piston system (2) is driven to reciprocate. The water supply mechanism for the water meter testing has the advantages that water resource can be circularly utilized and water amount with a standard value can be actively produced.
Description
Technical field
The utility model relates to the water supply mechanism that a kind of water meter calibration is used.
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 configures 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 large many of general flowmeter, metering performance under the low discharge, boundary flow Q are more poured into water meter in the family simultaneously
2With minimum flow Q
1Value all smaller.When first calibrating and factory inspection, 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 legality measurement, 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 are without 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 apparatus for calibrating water meter and method, there are several problems in the handy aspect of its work efficiency and efficiency:
1, conventional apparatus for calibrating water meter 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 afterwards standard value of calculating, passive generation;
2, the calibrating time long, with DN15, Q
3=2.5, Q
3/ Q
1=100 water meter is example, and the calibrating under the minimum flow needs 20 minutes kinds at least, calibrating minimum flow Q
1, boundary flow Q
2, flow Q commonly used
3The approximately 43 minutes 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, conventional apparatus for calibrating water meter 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 larger pond or water tank simultaneously yet;
Low like this work efficiency causes some calibrating stations and water meter factory to buy a large amount of Water Meter table apparatus, has blindly in calibrating and verifying 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, the growth of calibrating employee's unstable and expense has more aggravated this phenomenon.
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 the Some Domestic device adopts has improved the calibrating efficient of water meter, but because the flow range of water meter is wider, it also is a difficult problem that the pattern of standard scale is selected with stability.
The utility model content
Technical problem to be solved in the utility model is to provide a kind of for above-mentioned prior art and can initiatively produce the flow standard value, do not need to configure the water supply mechanism that water pump and pressure stabilizing device, water meter calibration that energy utilization rate is higher are used.
The utility model solves the problems of the technologies described above the technical scheme that adopts: the water supply mechanism that this a kind of water meter calibration is used 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 the first pipeline with linked to each other by water gauge;
Linked to each other with the water inlet of tank by second pipe by the outlet of water gauge, 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;
Control device, link to each other with power-driven mechanism, outlet valve, water intaking valve, preserve the systematic parameter of described piston system in this control device, can export corresponding power control signal to the to-and-fro movement of described power-driven mechanism with the driven plunger system according to detecting the flow needs.
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 configured reductor, guarantees the stable of maximum test flow, has also controlled the noise of device running simultaneously.
Described piston system comprises: piston cylinder, air-tight movable are 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 according to the parameter of flow range and stepper motor, determine diameter and the length of piston cylinder.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.
Compared with prior art, the utility model has the advantage of:
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, and water resource can be recycling;
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 whole process of the test, test hydraulic pressure is selected arbitrarily in a scope according to the pressure loss and the operation valve of water meters in series connection, (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 the water supply mechanism that water meter calibration is used among the utility model embodiment.
Embodiment
Embodiment is described in further detail the utility model below in conjunction with accompanying drawing.
The water supply mechanism that water meter calibration is as shown in Figure 1 used, 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, air-tight movable is 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 the 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 by the water inlet of second pipe with tank 5 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;
In the present embodiment, the water inlet of piston system 2 and water delivering orifice are same;
Control device 9, control device 9 is a PLC controller, link to each other with power-driven mechanism 1, outlet valve 3, water intaking valve 7, the systematic parameter of preserving described piston system 2 in this control device 9 can be 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.
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, sets 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 the parameters such as piston cylinder diameter, the instruction step motor drives the screw mandrel rotation with a certain speed (being flow), screw mandrel rotary actuation piston advances forward, the volume of piston advances forward " squeezes " water that goes out, flows through by water gauge, and the water woman second pipe that water meter flows out enters tank, then be connected with piston system again by filtrator, water intaking valve, can realize recycling of water resource.
Claims (5)
1. the water supply mechanism that water meter calibration is used 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 the first pipeline and linked to each other by water gauge (4);
Linked to each other by the water inlet of second pipe with tank (5) 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);
Control device (9), link to each other with power-driven mechanism (1), outlet valve (3), water intaking valve (7), be used for exporting corresponding power control signal to the to-and-fro movement of described power-driven mechanism (1) with driven plunger system (2).
2. the water supply mechanism used of water meter calibration according to claim 1, it is characterized in that: described power-driven mechanism (1) comprises stepper motor and reductor.
3. the water supply mechanism used of water meter calibration according to claim 1 and 2, it is characterized in that: described piston system (2) comprising: piston cylinder (21), air-tight movable is 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).
4. apparatus for calibrating water meter according to claim 3, 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 the upper side relative with piston (22) connection of described piston cylinder (21) is provided with vent port (25).
5. apparatus for calibrating water meter according to claim 1, it is characterized in that: described control device (9) comprises a PLC controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220591137 CN202885920U (en) | 2012-11-08 | 2012-11-08 | Water supply mechanism for water meter testing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220591137 CN202885920U (en) | 2012-11-08 | 2012-11-08 | Water supply mechanism for water meter testing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202885920U true CN202885920U (en) | 2013-04-17 |
Family
ID=48077334
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220591137 Expired - Fee Related CN202885920U (en) | 2012-11-08 | 2012-11-08 | Water supply mechanism for water meter testing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202885920U (en) |
-
2012
- 2012-11-08 CN CN 201220591137 patent/CN202885920U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130417 Termination date: 20181108 |