CN104198020A - Flow calibrator based on static weighing method - Google Patents
Flow calibrator based on static weighing method Download PDFInfo
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- CN104198020A CN104198020A CN201410465933.8A CN201410465933A CN104198020A CN 104198020 A CN104198020 A CN 104198020A CN 201410465933 A CN201410465933 A CN 201410465933A CN 104198020 A CN104198020 A CN 104198020A
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- weighing
- high speed
- water tank
- speed cylinder
- connecting rod
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Abstract
The invention discloses a flow calibrator based on a static weighing method and belongs to a large-sized experimental measuring instrument. The flow calibrator comprises a distribution box, a weighing water box, an electronic scale and a control box. The distribution box is used for quickly changing a water flow direction. The weighing water box is used for loading total water flow in a certain time. The electronic scale is used for measuring weight of water. The control box is used for controlling a whole system and acquiring, analyzing and auto-processing data. The flow calibrator has the advantages that all parts are integrated, automatic control and precise computational analysis are achieved, and flow of a pipeline is accurately measured conveniently.
Description
Technical field
The invention belongs to flow measurement technology field, relate to a kind of device of measuring channel flow, flow measurement and calibration device that especially can integrated operation.
Background technology
The accurate measurement of flow is very important for national economy every field such as water conservancy, water power, chemical industry, oil, waterwork, agricultural and environmental protection.At present, electromagnetic flowmeter, the electronic flow device in the modern times such as differential pressure flowmeter, ultrasonic flow meter, Doppler's flow instrument is widely used in the measurement of pipeline flow and open channel flow rate, and they can be for measuring dynamic fluctuations in discharge.The ultimate principle of these devices is: uninterrupted is converted into electric signal by sensor, then electric signal is converted into digital signal.But when these equipment reach certain time limit service time, in it, establish sensor drift phenomenon can occur.Meanwhile, it is larger that these equipment are affected by temperature, installation environment etc., therefore must adopt other high-precision flow measurement mechanisms to carry out calibration to it in a lot of situation.
Summary of the invention
For calibration is equipped with the electronic flow measurement device of sensor, the invention provides and a kind ofly can not only measure exactly the flow under pipeline steady flow, also can carry out to electronic flow measurement device the flow calibration instrument based on static weighing method of calibration simultaneously.
The technical solution adopted in the present invention is: a kind of flow calibration instrument based on static weighing method, is characterized in that: comprise electronic scales, the water tank of weighing, diversion box, high speed cylinder, air compressor machine, reversing switch, control box, steel bracket, connecting rod; On described high speed cylinder, be provided with two high speed cylinder air inlet/outlets, be respectively head air inlet/outlet and afterbody air inlet/outlet, the described water tank upper of weighing is provided with the water tank inlet of weighing; Described diversion box is double-deck three chamber structures, its inside is by the reversion chute that arranges and described diversion box is separated into two-layer up and down with the slide block that chute agrees with, in the middle of the lower floor of described diversion box, be provided with dividing plate, described diversion box lower floor is separated into independently left chamber and right chamber, described left chamber bottom is provided with the first row mouth of a river, right chamber bottom is provided with the second row mouth of a river, and the described second row mouth of a river is connected with the described water tank inlet of weighing by pipeline; On described slide block bottom surface and described dividing plate, end face is fitted, also can in described reversion chute, be horizontally slipped; The described water tank of weighing is positioned on described electronic scales, and does not contact with other any device generation mechanics, is arranged in described steel bracket inner chamber; Described diversion box, high speed cylinder, reversing switch, air compressor machine are sequentially arranged on described steel bracket upper beam; The piston rod of described high speed cylinder is fixedly connected with described slide block by described connecting rod, and described air compressor machine is connected with described reversing switch by tracheae, and described reversing switch is connected with two described high speed cylinder air inlet/outlets respectively by tracheae; When described air compressor machine by tracheae from the head air inlet/outlet to the tonifying Qi of high speed cylinder head, thereby the slide plate that drives described connecting rod to promote in diversion box slides left in chute, can open that right chamber is closed left chamber and by the described second row mouth of a river and heavy-water tank water inlet to the described water tank water filling of weighing; Described air compressor machine by tracheae from afterbody air inlet/outlet to the tonifying Qi of high speed cylinder afterbody, thereby the slide plate that drives described connecting rod to promote in diversion box slides to the right in chute, can open left chamber and close right chamber and outwards drain current by the described first row mouth of a river; Described control box is connected with reversing switch with described electronic scales, high speed cylinder respectively by signal wire, described control box is controlled described reversing switch operation cylinder tonifying Qi direction, and the action of high speed cylinder, and automatically gather all data, automatic analysis data and calculate flow.
As preferably, described data comprise: connecting rod moves right time, the connecting rod residence time, connecting rod run duration, water body weight left.
As preferably, described high speed cylinder is fixedly mounted on described steel bracket upper beam by adjustable hold-down support, and its piston rod and connecting rod are at same axis.
As preferably, described connecting rod is provided with sealing ring through described outer wall place, diversion box upper strata.
As preferably, the described tank outer wall of weighing is provided with the 3rd freeing port, outside draining while reaching a certain amount of for the water body when the water tank of weighing; The described water tank bottom of weighing is provided with the 4th freeing port, for outwards drain water when water tank is weighed in maintenance.
The invention has the beneficial effects as follows: a whole set of integrating device adopts robotization to control, and can carry out easily and effectively flow measurement and flowmeter calibration; Adopt high speed cylinder to control slide block, can accelerate current switch speed, thus accurate flow measurement.
Accompanying drawing explanation
Fig. 1: the structural representation of the embodiment of the present invention;
Fig. 2: the diversion box three-dimensional internal topology view of the embodiment of the present invention;
Fig. 3: the diversion box front elevation of the embodiment of the present invention;
Fig. 4: the flow measurement principle of the embodiment of the present invention;
Fig. 5: the electromagnetic flowmeter calibration result of the embodiment of the present invention.
Embodiment
For the ease of those of ordinary skills, understand and enforcement the present invention, below in conjunction with drawings and Examples, the present invention is described in further detail, should be appreciated that exemplifying embodiment described herein, only for description and interpretation the present invention, is not intended to limit the present invention.
Ask for an interview Fig. 1, Fig. 2 and Fig. 3, the technical solution adopted in the present invention is: a kind of flow calibration instrument based on static weighing method, comprises electronic scales 1, the water tank 2 of weighing, diversion box 3, high speed cylinder 4, air compressor machine 5, reversing switch 6, control box 8, steel bracket 14, connecting rod 16; On high speed cylinder 4, be provided with two high speed cylinder air inlet/outlets, be respectively head air inlet/outlet 150 and afterbody air inlet/outlet 151, water tank 2 tops of weighing are provided with the water tank inlet 10 of weighing; Water tank 2 outer walls of weighing are provided with the 3rd freeing port 12, outside draining while reaching a certain amount of for the water body when the water tank 2 of weighing; Water tank 2 bottoms of weighing are provided with the 4th freeing port 13, for outwards drain water when water tank is weighed in maintenance; Diversion box 3 is double-deck three chamber structures, its inside is by the reversion chute 19 that arranges and diversion box 3 is separated into two-layer up and down with the slide block 18 that chute agrees with, in the middle of the lower floor of diversion box 3, be provided with dividing plate 20, diversion box 3 lower floors are separated into independently left chamber and right chamber, left chamber bottom is provided with the first row mouth of a river 110, right chamber bottom is provided with the second row mouth of a river 111, and the second row mouth of a river 111 is connected with the water tank inlet 10 of weighing by pipeline; On slide block 18 bottom surfaces and dividing plate 20, end face is fitted, also can in reversion chute 19, be horizontally slipped; The water tank 2 of weighing is positioned on electronic scales 1, and does not contact with other any device generation mechanics, is arranged in steel bracket 14 inner chambers; Diversion box 3, high speed cylinder 4, reversing switch 6, air compressor machine 5 orders are arranged on steel bracket 14 upper beams; The piston rod of high speed cylinder 4 is fixedly connected with slide block 18 by connecting rod 16, and air compressor machine 5 is connected with reversing switch 6 by tracheae 7, and reversing switch 6 is connected with two high speed cylinder air inlet/outlets respectively by tracheae 7; When air compressor machine 5 by tracheae 7 from the head air inlet/outlet 150 to the 4 head tonifying Qi of high speed cylinder, thereby the slide plate 18 that drivening rod 16 promotes in diversion boxs 3 slides left in chute 19, can open that right chamber is closed left chamber and by the second row mouth of a river 111 and heavy-water tank water inlet 10 to water tank 2 water fillings of weighing; Air compressor machine 5 passes through tracheae 7 from afterbody air inlet/outlet 151 to the 4 afterbody tonifying Qi of high speed cylinder, thereby the slide plate 18 that drivening rod 16 promotes in diversion box 3 slides to the right in chute 19, can open left chamber and close right chamber and outwards drain current by the first row mouth of a river 110; Control box 8 is connected with electronic scales 1, high speed cylinder 4 and reversing switch 6 respectively by signal wire 9, control box 8 is controlled reversing switch 6 operation cylinder tonifying Qi directions, and the action of high speed cylinder 4, and automatically gather all data, automatic analysis data and calculate flow; Data comprise: connecting rod 16 moves right time, 16 residence time of connecting rod, connecting rod 16 run duration, water body weight left.
The high speed cylinder 4 of the present embodiment is fixedly mounted on steel bracket 14 upper beams by adjustable hold-down support 17, and its piston rod and connecting rod 16 are at same axis; Connecting rod 16 is provided with sealing ring 21 through diversion box 3 outer wall places, upper strata.High speed cylinder 4 adopts adjustable hold-down support 17 fixing, and fine-tuning cylinder position, makes the piston rod of high speed cylinder 4 and connecting rod 16 remain on same axis.Connecting rod 16 is provided with sealing ring 21 in diversion box 3 inflow points, prevents current seepage.Whole diversion box adopts slotted eye to connect, and interface scribbles encapsulant.
The control box 8 of the present embodiment is controlled reversing switch 6 operation high speed cylinder 4 tonifying Qi directions by signal wire, and the action of high speed cylinder 4.When the water tank inlet 10 of weighing is opened completely, control box 8 starts to clock, after certain hour, control box 8 move instructions are to reversing switch 6, change high speed cylinder 4 tonifying Qi directions, thereby make high speed cylinder 4 promote slide block 18, close right chamber, now control box 8 stops clocking.Control box 8 is also by the time of recording high speed cylinder 4 left and moving right simultaneously.Electronic scales 1 is measured the water body weight flowing in this time period, by signal feedback to control box 8, by its analysis and calculation flow.When the water body of the water tank 2 of weighing reaches a certain amount of, by the 3rd freeing port 12 drainings, when maintenance is weighed water tank need to drain water time, then by the 4th freeing port 13 drainings.
The diversion box 3 of the present embodiment has coordinated current to switch by high speed cylinder 4, the shortlyest can in 0.1s, complete switching, can accurately draw the T.T. that flows into the water tank 2 of weighing.
Fig. 4 has provided the principle of flow measurement.Diversion box slide block size (300 * 300mm) is greater than water delivering orifice size (250 * 250mm), opening while weighing water tank import, slide block moves 25mm during to outlet edge backward, weigh water tank import still in closed state, when moving to another edge (275mm), the water tank import of weighing is in complete opening.Therefore, the stroke of actual opening and closing is 25～275mm.By the known uninterrupted of means of formula of orifice, be directly proportional to water delivering orifice area, be directly proportional to movement cylinder stroke.Cylinder is when setting in motion and end motion, and speed is the slowest.Suppose slide block opening time t
1, shut-in time t
2, residence time t
3, Water quality is M, flow formula is:
T in practical operation
3at 60s left and right, t
1, t
2time is generally between 0.1～0.5s, and the actual water tank inlet opening and closing used time of weighing (stroke 25-275mm) is shorter, roughly in 0.06～0.3s.Consider the opening and closing time, adopt method of average pot life measuring accuracy to be controlled in 2 ‰.Electronic scales precision is controlled in 0.5 ‰, and device overall precision is in 2.5 ‰.
Fig. 5 has provided and has adopted this practical electromagnetic flowmeter calibration result carrying out, and this electromagnetic flowmeter is not used for a long time, and installation environment is not in full conformity with installation code.Adopt calibration instrument can revise electromagnetic flowmeter AD transformation parameter, thereby revise the drift of sensor.
Although the terms such as this instructions has more been used electronic scales 1, the water tank 2 of weighing, diversion box 3, high speed cylinder 4, air compressor machine 5, reversing switch 6, tracheae 7, control box 8, signal wire 9, the water tank inlet 10 of weighing, the first row mouth of a river 110, the second row mouth of a river 110, the 3rd freeing port 12, the 4th freeing port 13, steel bracket 14, head air inlet/outlet 150, afterbody air inlet/outlet 151, connecting rod 16, cylinder hold-down support 17, slide plate 18, chute 19, dividing plate 20 and sealing ring 21, do not get rid of the possibility of using other terms.Use these terms to be only used to describe more easily essence of the present invention, they are construed to any additional restriction is all contrary with spirit of the present invention.
Should be understood that, the part that this instructions does not elaborate all belongs to prior art.
Should be understood that; the above-mentioned description for preferred embodiment is comparatively detailed; can not therefore think the restriction to scope of patent protection of the present invention; those of ordinary skill in the art is under enlightenment of the present invention; do not departing from the scope situation that the claims in the present invention protect; can also make and replacing or distortion, within all falling into protection scope of the present invention, the scope of asking for protection of the present invention should be as the criterion with claims.
Claims (5)
1. the flow calibration instrument based on static weighing method, is characterized in that: comprise electronic scales (1), the water tank of weighing (2), diversion box (3), high speed cylinder (4), air compressor machine (5), reversing switch (6), control box (8), steel bracket (14), connecting rod (16);
On described high speed cylinder (4), be provided with two high speed cylinder air inlet/outlets, be respectively head air inlet/outlet (150) and afterbody air inlet/outlet (151), the described water tank of weighing (2) top is provided with the water tank inlet of weighing (10);
Described diversion box (3) is double-deck three chamber structures, its inner reversion chute (19) by setting and the slide block (18) agreeing with chute are separated into two-layer up and down by described diversion box (3), in the middle of the lower floor of described diversion box (3), be provided with dividing plate (20), described diversion box (3) lower floor is separated into independently left chamber and right chamber, described left chamber bottom is provided with the first row mouth of a river (110), right chamber bottom is provided with the second row mouth of a river (111), the described second row mouth of a river (111) is connected with the described water tank inlet of weighing (10) by pipeline, the upper end face laminating of described slide block (18) bottom surface and described dividing plate (20), and can in described reversion chute (19), horizontally slip,
It is upper that the described water tank of weighing (2) is positioned over described electronic scales (1), and do not contact with other any device generation mechanics, is arranged in described steel bracket (14) inner chamber; Described diversion box (3), high speed cylinder (4), reversing switch (6), air compressor machine (5) order are arranged on described steel bracket (14) upper beam; The piston rod of described high speed cylinder (4) is fixedly connected with described slide block (18) by described connecting rod (16), described air compressor machine (5) is connected with described reversing switch (6) by tracheae (7), and described reversing switch (6) is connected with two described high speed cylinder air inlet/outlets respectively by tracheae (7); When described air compressor machine (5) by tracheae (7) from the head air inlet/outlet (150) to high speed cylinder (4) head tonifying Qi, thereby the slide plate (18) that drives described connecting rod (16) to promote in diversion box (3) slides left in chute (19), can open right chamber close left chamber, and by the described second row mouth of a river (111) and heavy-water tank water inlet (10) to the described water tank of weighing (2) water filling; Described air compressor machine (5) passes through tracheae (7) from afterbody air inlet/outlet (151) to high speed cylinder (4) afterbody tonifying Qi, thereby the slide plate (18) that the described connecting rod (16) of drive promotes in diversion box (3) slides to the right in chute (19), can open left chamber and close right chamber, also by the described first row mouth of a river (110), outwards drain current;
Described control box (8) is connected with described electronic scales (1), high speed cylinder (4) and reversing switch (6) respectively by signal wire (9), described control box (8) is controlled described reversing switch (6) operation cylinder tonifying Qi direction, and the action of high speed cylinder (4), and automatically gather all data, automatic analysis data and calculate flow.
2. the flow calibration instrument based on static weighing method according to claim 1, is characterized in that: described data comprise: connecting rod (16) moves right time, connecting rod (16) residence time, connecting rod (16) run duration, water body weight left.
3. the flow calibration instrument based on static weighing method according to claim 1, it is characterized in that: described high speed cylinder (4) is fixedly mounted on described steel bracket (14) upper beam by adjustable hold-down support (17), and its piston rod and connecting rod (16) are at same axis.
4. the flow calibration instrument based on static weighing method according to claim 1, is characterized in that: described connecting rod (16) is provided with sealing ring (21) through described outer wall place, diversion box (3) upper strata.
5. the flow calibration instrument based on static weighing method according to claim 1, is characterized in that: the described water tank of weighing (2) outer wall is provided with the 3rd freeing port (12), outside draining while reaching a certain amount of for the water body when the water tank of weighing (2); The described water tank of weighing (2) bottom is provided with the 4th freeing port (13), for outwards drain water when water tank is weighed in maintenance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410465933.8A CN104198020B (en) | 2014-09-12 | 2014-09-12 | A kind of flow calibration instrument based on static weighing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410465933.8A CN104198020B (en) | 2014-09-12 | 2014-09-12 | A kind of flow calibration instrument based on static weighing method |
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| Publication Number | Publication Date |
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| CN104198020A true CN104198020A (en) | 2014-12-10 |
| CN104198020B CN104198020B (en) | 2017-03-29 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020095972A1 (en) * | 2000-12-04 | 2002-07-25 | Mcmillan Robert D. | Low friction piston for gas flow calibration systems |
| CN101099078A (en) * | 2005-01-12 | 2008-01-02 | 微动公司 | Gas flowmeter calibration stand |
| CN101556181A (en) * | 2009-05-20 | 2009-10-14 | 西安东风机电有限公司 | Composite static start-stop method mass flowmeter calibration system |
| CN103234606A (en) * | 2013-04-19 | 2013-08-07 | 睿能太宇（沈阳）能源技术有限公司 | System and method for verifying flow rate |
| CN103411653A (en) * | 2013-08-30 | 2013-11-27 | 福建恒劲科博测控技术有限公司 | Calibration and detection device of liquid flow meter |
| CN204101143U (en) * | 2014-09-12 | 2015-01-14 | 武汉大学 | A kind of flow calibration instrument based on static weighing method |
-
2014
- 2014-09-12 CN CN201410465933.8A patent/CN104198020B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020095972A1 (en) * | 2000-12-04 | 2002-07-25 | Mcmillan Robert D. | Low friction piston for gas flow calibration systems |
| CN101099078A (en) * | 2005-01-12 | 2008-01-02 | 微动公司 | Gas flowmeter calibration stand |
| CN101556181A (en) * | 2009-05-20 | 2009-10-14 | 西安东风机电有限公司 | Composite static start-stop method mass flowmeter calibration system |
| CN103234606A (en) * | 2013-04-19 | 2013-08-07 | 睿能太宇（沈阳）能源技术有限公司 | System and method for verifying flow rate |
| CN103411653A (en) * | 2013-08-30 | 2013-11-27 | 福建恒劲科博测控技术有限公司 | Calibration and detection device of liquid flow meter |
| CN204101143U (en) * | 2014-09-12 | 2015-01-14 | 武汉大学 | A kind of flow calibration instrument based on static weighing method |
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| CN104198020B (en) | 2017-03-29 |
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