CN202362059U - Water meter calibrating device - Google Patents
Water meter calibrating device Download PDFInfo
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- CN202362059U CN202362059U CN2011204262715U CN201120426271U CN202362059U CN 202362059 U CN202362059 U CN 202362059U CN 2011204262715 U CN2011204262715 U CN 2011204262715U CN 201120426271 U CN201120426271 U CN 201120426271U CN 202362059 U CN202362059 U CN 202362059U
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- water
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- water inlet
- piston
- water tank
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Abstract
The utility model discloses a water meter calibrating device. All timers and frequency counters in the water meter calibrating device are respectively connected with corresponding pulse control lines of a photoelectric sampler and a servo motor; a protecting sleeve is fixedly connected with a cylinder body of a hydraulic cylinder; the servo motor is fixed on the protecting sleeve; a rotating shaft of the servo motor is fixedly connected with one end of a screw rod by a coupler; the other end of the screw rod is connected with a screw nut which is connected with one end of a piston of the hydraulic cylinder; the hydraulic cylinder is provided with a cylinder body water inlet and a cylinder body water outlet; a water tank is provided with a water tank water inlet and a water tank water outlet; the cylinder body water inlet is communicated with the water tank water outlet by a first water inlet pipe; the cylinder body water outlet is provided with a water outlet pipe; the water tank water inlet is provided with a second water inlet pipe; and each of the first water inlet pipe and the second water inlet pipe is provided with a switching valve. The water meter calibrating device realizes the independent timing and frequency counting and instantaneous volume flow acquisition for a piston standard device and all detected water meters which are connected in series.
Description
Technical field
The utility model relates to a kind of piston water meter calibrating installation.
Background technology
The water meter calibration device as the flux unit value unified with the standard of transmitting, on the one hand can for the transmission of quantity value of China's each department water meter accurately, unified important assurance is provided, can reliable basis be provided for work such as business accounting, trade settlements on the other hand.When formulating water meter country's (enterprise) standard and vertification regulation, can also utilize testing method that the water meter calibration device studies well, reliable and carry out various test figures checkings.In addition, when all kinds water meter was carried out type evaluation and calibrating, calibration, the water meter calibration device was the criterion of water meter measurement performance criteria, for quality supervision department and measurement technology mechanism provide the reliable technique foundation.
At present; The water meter calibration device that each measurement technology mechanism and manufacturing enterprise use, transform remains traditional standard set-up based on Static Volumetric Method or rest mass method; According to operating position and the trend of flow development of new techniques to device; Above-mentioned conventional apparatus has highlighted more limitation, mainly shows as: the calibrating efficient of (1) Static Volumetric Method water meter calibration device is low, because the work measuring instrument of Static Volumetric Method water meter calibration device generally is to have the Pear-Shaped measuring device that measures neck.When use device is examined and determine, have only liquid to reach metering neck place, the volume in the measuring device could be read.Therefore, the calibrating flow hour, the calibrating time spent is longer, shows as the calibrating inefficiency; (2) Static Volumetric Method operation and reading are undertaken by manual work basically, and the uncertainty of measurement of bringing thus is big; (3) weighing apparatus in the rest mass method water meter calibration device is subject to environment (like vibration, temperature, humidity etc.) influence, and environmental baseline is difficult to guarantee, particularly water pump, pipe vibration, thereby drift takes place in weighing apparatus easily, accuracy is difficult to be guaranteed; (4) be difficult for energy-conservation (Static Volumetric Method, rest mass method), water pump is in case startup even change water meter during the calibrating, is installed and also no longer stopped, and therefore power consumption seriously; (5) device (Static Volumetric Method, rest mass method) supplies water system big, and water body is difficult to purify; (6) device (Static Volumetric Method, rest mass method) takes up room greatly, moves in case build up then be difficult to.Know that through above analysis in use there are more limitation in traditional static volumetric method, rest mass method water meter calibration device, thereby expansion is imperative to the development work of new water meter calibrating installation.
The utility model content
The purpose of the utility model provides a kind of water meter calibration device and utilizes this device to carry out the method for water meter calibration.
For realizing above-mentioned purpose, the technical scheme that the utility model is taked is: the water meter calibration device that is provided comprises servomotor, shaft coupling, leading screw, feed screw nut, hydraulic cylinder, protection sleeve, is used to produce with said respectively by the photoelectric sampler of the corresponding laser beam of hand motion of water gauge, chronoscope frequency device and water tank; Each said chronoscope device frequently correspondingly is connected with the corresponding photoelectric sampler and the pulse operation circuit of servomotor; Said protection sleeve is fixedly connected with the cylinder body of said hydraulic cylinder; Servomotor is fixed on the protection sleeve; The rotation axis of servomotor is fixedly connected with an end of leading screw through shaft coupling, and the other end of leading screw is connected with feed screw nut, and feed screw nut is connected with an end of the piston of said hydraulic cylinder; Said cylinder body is provided with cylinder body water inlet and cylinder body water delivering orifice; Said water tank is provided with water tank inlet and water outlet of water tank; Said cylinder body water inlet is communicated with said water outlet of water tank through first water inlet pipe; Said cylinder body water delivering orifice place is equipped with rising pipe, and said water tank inlet place is equipped with second water inlet pipe, on said first water inlet pipe, second water inlet pipe and the rising pipe switch valve is installed all.
Preferably, the utility model also comprises guide pole, and said guide pole is fixedly connected with the cylinder body of said protection sleeve and hydraulic cylinder respectively, and said guide pole and piston (6) are slidingly matched.
The principle of work of the utility model water meter calibration device is: because water hour is incompressible at pressure; Moving horizontally the volume that gets into cylinder body in unit interval as the piston of water meter calibration device volumetric standard promptly is the volume of piston drainage water, and this process is promptly accomplished the volume displaced of piston, water.Move horizontally in the process at piston; The timing of device frequently of the chronoscope that is connected with the operation circuit of servomotor begin with the concluding time section in the piston range ability be that gating pulse quantity and leading screw pitch according to servomotor calculates, and go out the average discharge of water meter calibration device in this time period according to volume displaced Model Calculation.Each photoelectric sampler is cooperated the corresponding photoelectric pulse signal of generation by water gauge with each in the process that piston at the uniform velocity moves horizontally; Send into each and carried out chronoscope independently frequently (in this process by the corresponding chronoscope frequency device of water gauge; Each is begun with end not necessarily synchronous by the timing of water gauge; And follow the timing of the chronoscope frequency device that is connected with the operation circuit of servomotor also not necessarily synchronous; The chronoscope that promptly is connected with the operation circuit of servomotor device and every is frequently adopted all by water gauge that base carries out timing when independent; This clocking method is called when independent " base recombination time clocking method "); Calculated each by the average discharge of water gauge by the chronoscope frequency result of the chronoscope frequency device of water gauge correspondence, the chronoscope frequency result of the chronoscope frequency device that the while basis is connected with the operation circuit of servomotor calculates the average discharge of water meter calibration device according to each; Each is compared by the average discharge of the average discharge of water gauge and water meter calibration device, obtains each by the error of indication of water gauge.
Compared with prior art; The beneficial effect of the utility model is: the utility model not only provides a kind of novel piston water meter calibrating installation that is used for water meter calibration; And adopt when independent " base clocking method recombination time " to combine the mode of piston standard, realized many by water gauge series connection calibrating; The more important thing is through adopting when independent " base clocking method recombination time " to realize that piston standard and Ge Tai are by the independent chronoscope frequency of water gauge and obtaining of instantaneous volume flow rate; Shortened by the calibrating time of water gauge; Overturned and adopted traditional start and stop method carried out the right calibrating mode of cumulative volume throughput ratio by water gauge; Reduce the uncertainty that start and stop and seized meter reading cause, improved the accuracy of measurement and the work efficiency of water meter calibration device greatly.
Description of drawings
Fig. 1 is the structural representation of the utility model water meter calibration device.
Embodiment
The utility model is according to the operating position to traditional water meter calibration device based on Static Volumetric Method and rest mass method; Many limitation that the conventional water meter calibrating installation highlights have been analyzed; The trend that combines the water meter calibration development of new techniques on this basis; Proposed a kind ofly to needing independent chronoscope when independent " base clocking method recombination time " of object frequently, and this method has been combined with the piston water meter calibrating installation of the utility model, realized that many are examined and determine by the series connection of water gauge.
As shown in Figure 1, the utility model water meter calibration device comprises servomotor 1, shaft coupling 2, leading screw 3, feed screw nut 4, hydraulic cylinder, protection sleeve 7, photoelectric sampler 15, chronoscope device (not shown) and water tank 17 frequently.Wherein, photoelectric sampler 15 be used to produce with each by the corresponding laser beam of the hand motion of water gauge.The pulse operation circuit of each photoelectric sampler 15 and servomotor 1 all is connected with corresponding chronoscope device frequently independently.The openend of protection sleeve 7 is fixedly connected with the cylinder body of hydraulic cylinder 9; Piston 6 stretches into from the opening part of protection sleeve 7, and can in protection sleeve 7, move around.In protection sleeve 7, an end of the piston 6 in feed screw nut 4 and the hydraulic cylinder is connected, and an end of leading screw 3 is connected with feed screw nut 4.Servomotor 1 is fixed on the top of protection sleeve 7, and the rotation axis of servomotor 1 is fixedly connected with the other end of leading screw 3 through shaft coupling 2.Cylinder body 9 is provided with cylinder body water inlet and cylinder body water delivering orifice, and water tank 17 is provided with water tank inlet and water outlet of water tank.The cylinder body water inlet is communicated with water outlet of water tank through first water inlet pipe 10, and cylinder body water delivering orifice place is equipped with rising pipe.The water tank inlet place is equipped with on second water inlet pipe, 16, the first water inlet pipes 10, second water inlet pipe 16 and the rising pipe and is separately installed with switch valve 11, switch valve 14 and switch valve 12.Servomotor 1 is fixed on the top of protection sleeve 7, and its transmission shaft is fixedly connected with an end of leading screw 3 through shaft coupling 2; Feed screw nut 4 is fixed on the head end of the piston 6 of hydraulic cylinder, and is connected with leading screw 3.O-ring seal 8 is the concentric double density seal of O type, embeds in the O type groove of cylinder body 9 of hydraulic cylinder, and cooperates with piston 6, realizes the sealing function when piston 6 moves.Servomotor 1 rotating band movable wire thick stick 3 rotates, and cooperates with feed screw nut 4 to convert rotation into piston 6 move horizontally.
As the preferred version of the utility model, a guide pole 5 can be installed in protection sleeve 7.Guide pole 5 is fixedly connected with the cylinder body 9 of protection sleeve 7 and hydraulic cylinder respectively, and guide pole 5 is slidingly matched with piston 6.Guide pole 5 can be guaranteed steadily moving of piston 6.
When utilizing the water meter calibration device of the utility model that water meter is examined and determine, its course of work can be divided into two parts: i) air exclusion process; Ii) water meter calibration process.Below specify.
I) air exclusion process:
1) as shown in Figure 1, each is installed in series between second water inlet pipe 16 and rising pipe by water gauge 13.
2) control servomotor 1 is rotated in the forward to drive leading screw 3 and does to rotate in the same way; And move horizontally (moving right) through the forward that cooperates rotation with leading screw 3 to convert piston 6 into of leading screw 3 and feed screw nut 4, arrive the bottom (being the low order end of cylinder body 9) of cylinder bodies 9 in Fig. 1 until piston 6.
3) close switch valve 14, switch valve 12 on second water inlet pipe 16 and the rising pipe, open the switch valve 11 on first water inlet pipe.
4) control servomotor 1 reverse rotation is done to rotate in the same way to drive leading screw 3, and converts oppositely the moving horizontally of piston 6 (being moved to the left) into through the rotation with leading screw 3 of cooperating of leading screw 3 and feed screw nut 4, until the head of piston 6 arrival cylinder bodies 9; Oppositely move horizontally in the process at piston 6, the water in the water tank 17 gets into cylinder body 9 through first water inlet pipe 10.
5) close switch valve 11 on first water inlet pipe 10, open switch valve 14 and switch valve 12 on second water inlet pipe 16 and the rising pipe.
6) control servomotor 1 is rotated in the forward to drive leading screw 3 and does to rotate in the same way, and moves horizontally through the forward that cooperates rotation with leading screw 3 to convert piston 6 into of leading screw 3 and feed screw nut 4, until the bottom of piston 6 arrival cylinder bodies 9.
7) execution in step 3 repeatedly) to step 6), until the air in cylinder body 9, rising pipe and second water inlet pipe 16 is got rid of fully.
Ii) water meter calibration process:
8) step 2 the above air exclusion process i of execution)) to step 5).
9) control servomotor 1 forward quickens to rotate to the rotation that remains a constant speed behind the rotating speed corresponding with required calibrating flow; Do to rotate in the same way through the rotating band movable wire thick stick 3 of servomotor 1 simultaneously, and convert moving horizontally of piston 6 into the rotation that cooperates of feed screw nut 4 to discharge the water in the cylinder body 9 by required calibrating flow with leading screw 3 through leading screw 3.And piston 6 correspondingly by quicken to move transfer at the uniform velocity move horizontally after, the chronoscope that is connected with the operation circuit of servomotor 1 device frequently begins to piston operation and carries out independent chronoscope frequency.
After servomotor 1 transferred uniform rotation to, the laser beam of each photoelectric sampler 15 cooperated corresponding generation respectively by the chronoscope of water gauge 13 frequency synchronizing pulse with the corresponding pointer by water gauge 13; Each is correspondingly carried out independently chronoscope respectively frequently by water gauge 13 by the device chronoscope pulse frequently of being sent according to the photoelectric sampler 15 of correspondence frequently of the corresponding chronoscope of water gauge 13 to each.
10) at each chronoscope corresponding after the timing time of device arrives self the shortest timing time of setting frequently by water gauge; The laser beam of corresponding photoelectric sampler 15 with corresponding cooperated by the pointer of water gauge 13 generation corresponding by the chronoscope of water gauge 13 frequency lock-out pulse; Each by the corresponding chronoscope of water gauge frequently the chronoscope that sent based on each self-corresponding photoelectric sampler 15 of device frequently lock-out pulse stop to correspondence by the chronoscope of water gauge 13 frequently; Based on each by the corresponding chronoscope of the water gauge time and the umber of pulse of device accumulative total frequently, by formula (1) calculate each correspondence by the average discharge of water gauge 13:
Q
i＝(P
i×N
i)/t
i (1)
In the formula (1), Q
iBe that the i platform is by the average discharge of water gauge in the time period that the chronoscope corresponding with it timing of device frequently begins and finishes, P
iBe the i platform by the pulse equivalency of water gauge, N
iThe i platform is by the accumulative total umber of pulse of water gauge in the time period that the timing of device frequently of i chronoscope begins and finishes, t
iIt is timing end of device frequently of i chronoscope and the mistiming that timing begins;
11) after each is stopped the chronoscope frequency by water gauge 13 last corresponding chronoscopes frequency devices; The chronoscope that is connected with the operation circuit of servomotor 1 device frequently stops the chronoscope frequency to piston 6 motions; By formula (2) calculate the chronoscope that is connected with the operation circuit of servomotor 1 frequently device in timing finishes the time period with beginning, the average discharge of water meter calibration device:
q＝(3.14×D
2/4×L)/t， (2)
In the formula (2), q be the chronoscope that is connected with the operation circuit of servomotor 1 frequently device in timing finishes the time period with beginning, the average discharge of water meter calibration device; D is the internal diameter of cylinder body 9; L be the chronoscope that is connected with the operation circuit of servomotor 1 frequently device in timing finishes the time period with beginning, piston 6 move horizontally distance; T is that the chronoscope device timing frequently that is connected with the operation circuit of servomotor 1 finishes and the mistiming that begins;
12) utilize formula (3) to obtain respectively by the error of indication of water gauge 13 under calibrating flow point:
E
i＝(Q
i-q)/q×100％ (3)
In the formula (3), E
iBe that the i platform is by the error of indication of water gauge 13 under calibrating flow point; Q
iBe that the i platform is by the average discharge of water gauge 13 in the time period that the chronoscope corresponding with it timing of device frequently begins and finishes; Q be the chronoscope that is connected with the operation circuit of servomotor 1 frequently device in timing finishes the time period with beginning, the average discharge of water meter calibration device;
13), judge whether servomotor 1 can continue to do to rotate in the same way based on examined and determine flow point and piston 6 distance of level run by the next one of water gauge 13.
Suppose carrying out by the next flow spot check of water gauge 13 regularly, piston 6 needs the distance (the effective range ability when containing piston acceleration, deceleration and calibrating flow point) of operation to be L
1The total effectively range ability of piston 6 and the difference of the distance that piston 6 has moved are L
tSo, if L
1-L
t＞0, show that then servomotor 1 can continue to do to rotate in the same way, otherwise show that then can not continue work again rotates in the same way.
If servomotor 1 can continue to do to rotate in the same way, then repeating step 9) accomplish the calibrating of this flow point to step 12); If can not continue to do rotates in the same way again, then execution in step 8) accomplish the calibrating of this flow point to step 12);
14) repeated execution of steps 13) accomplish each of series connection by the calibrating of water gauge 13.
The utility model adopts when independent " base clocking method recombination time " to combine the mode of piston standard; Many water meter series connection calibratings have not only been realized; The more important thing is through adopting when independent " base clocking method recombination time " to realize that piston standard and Ge Tai series connection are by the independent chronoscope frequency of water gauge and obtaining of instantaneous volume flow rate; Shortened by the calibrating time of water gauge; Overturned and adopted traditional start and stop method, reduced the uncertainty that start and stop and seized meter reading cause, improved the accuracy of measurement and the work efficiency of water meter calibration device greatly carried out the right calibrating mode of cumulative volume throughput ratio by water gauge.
Claims (2)
1. a water meter calibration device is characterized in that: comprise servomotor 1, shaft coupling 2, leading screw 3, feed screw nut (4), hydraulic cylinder, protection sleeve (7), be used for producing with said respectively by the photoelectric sampler (15) of the corresponding laser beam of hand motion of water gauge (13), chronoscope frequency device and water tank (17); Each said chronoscope device frequently correspondingly is connected with the corresponding photoelectric sampler (15) and the pulse operation circuit of servomotor (1); Said protection sleeve (7) is fixedly connected with the cylinder body (9) of said hydraulic cylinder; Servomotor (1) is fixed on the protection sleeve (7); The rotation axis of servomotor (1) is fixedly connected with an end of leading screw (3) through shaft coupling (2); The other end of leading screw (3) is connected with feed screw nut (4), and feed screw nut (4) is connected with an end of the piston (6) of said hydraulic cylinder; Said cylinder body (9) is provided with cylinder body water inlet and cylinder body water delivering orifice; Said water tank (17) is provided with water tank inlet and water outlet of water tank; Said cylinder body water inlet is communicated with said water outlet of water tank through first water inlet pipe (10); Said cylinder body water delivering orifice place is equipped with rising pipe, and said water tank inlet place is equipped with second water inlet pipe (16), on said first water inlet pipe (10), second water inlet pipe (16) and the rising pipe switch valve is installed all.
2. a kind of piston water meter calibrating installation according to claim 1; It is characterized in that: also comprise guide pole (5); Said guide pole (5) is fixedly connected with the cylinder body (9) of said protection sleeve (7) and hydraulic cylinder respectively, and said guide pole (5) is slidingly matched with piston (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204262715U CN202362059U (en) | 2011-11-01 | 2011-11-01 | Water meter calibrating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204262715U CN202362059U (en) | 2011-11-01 | 2011-11-01 | Water meter calibrating device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202362059U true CN202362059U (en) | 2012-08-01 |
Family
ID=46573239
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204262715U Withdrawn - After Issue CN202362059U (en) | 2011-11-01 | 2011-11-01 | Water meter calibrating device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202362059U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102393237A (en) * | 2011-11-01 | 2012-03-28 | 浙江省计量科学研究院 | Water meter calibrating device and method for water meter calibration |
-
2011
- 2011-11-01 CN CN2011204262715U patent/CN202362059U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102393237A (en) * | 2011-11-01 | 2012-03-28 | 浙江省计量科学研究院 | Water meter calibrating device and method for water meter calibration |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20120801 Effective date of abandoning: 20130306 |
|
| RGAV | Abandon patent right to avoid regrant |