CN105371926B - A kind of high-speed rotary for flow measurement divides water instrument - Google Patents

A kind of high-speed rotary for flow measurement divides water instrument Download PDF

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Publication number
CN105371926B
CN105371926B CN201510724792.1A CN201510724792A CN105371926B CN 105371926 B CN105371926 B CN 105371926B CN 201510724792 A CN201510724792 A CN 201510724792A CN 105371926 B CN105371926 B CN 105371926B
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cylinder
flow measurement
rotary
flow
back shroud
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CN105371926A (en
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曾威
杨建东
王学武
胡金弘
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Wuhan Langtaoshi Technology Co Ltd
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Wuhan Langtaoshi Technology Co Ltd
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01FMEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F25/00Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01FMEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F1/00Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
    • G01F1/76Devices for measuring mass flow of a fluid or a fluent solid material
    • G01F1/78Direct mass flowmeters

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  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring Volume Flow (AREA)

Abstract

The invention discloses a kind of high-speed rotaries for flow measurement to divide water instrument, belongs to a kind of large-scale experiment measuring instrument, can the full-section pipe-flow of (0 300L/s) larger to flow realize the switching of quick flow;Side of the present invention is connected to water tank of weighing, other side communicated drainage ditch;The duration that water tank of weighing is flowed into using timer record, measures the weight that inflow is weighed in water tank in the period, you can accurately calculate uninterrupted using weight method using electronic scale;The present invention is not influenced in switch speed by flow size, while can still be switched at high speed under big flow, so that meter flow/time length is measured more accurate, to realize accurate flow measurement.

Description

A kind of high-speed rotary for flow measurement divides water instrument
Technical field
The invention belongs to flow measurement technology fields, are related to a kind of device measuring pipeline flow, especially can accurately survey Device of the stream for calibration electronic flowmeter.
Background technology
The accurate measurement of flow is passed through for water conservancy, water power, chemical industry, oil, waterwork, agricultural and environmental protection etc. are national Every field of helping is particularly significant.Currently, electromagnetic flowmeter, the electronic flow dress in the modern times such as differential pressure flowmeter, ultrasonic flowmeter It sets and is widely used in pipeline flow measurement.The basic principle of these devices is to convert uninterrupted by sensor For electric signal, then convert electrical signals to digital signal.But these electronic devices when in use between reach certain time limit, or it is extraneous When environment changes, inside setting sensor can shift phenomenon, it is therefore necessary to use other more reliable, higher surveys of precision Amount device carries out calibration to it.It is very high to the exact requirements of flow measurement meanwhile in some hydraulic experiments, and use and claim The principle of weight method measurement of discharge is the simplest, and measurement parameter is the most direct, and measuring uncertainty is minimum, therefore this method is considered It is precision highest, uncertain minimum flow-measuring method.In weight method measurement of discharge, two most important parameters are water bodys Quality and meter stream time.And the precision for counting the stream time is directly related with the switch speed of water process is divided, it is general when flow is larger It is larger by water impact that water flowing stream switches transposition, it is difficult to be switched fast flow.Therefore have to be developed not by water hammering effects High speed divides water instrument.
Invention content
In order to which calibration is equipped with the electronic flow measurement device of sensor, the present invention provides one kind to accurately measure Go out the flow under pipeline steady flow, while can also carry out the flow based on static weighing method of calibration to electronic flow measurement device Calibration instrument.
The technical solution adopted in the present invention is:It is a kind of to divide water instrument for the rotary of flow measurement, including four-way steel pipe, Back shroud, back shroud sleeve, inner cylinder, inner cylinder connecting rod, gear and power plant;
Supervisor one end of the four-way steel pipe is water inlet, and the other end is closed by back shroud, and branch pipe is two water outlets, Water inlet connects the pipeline for waiting for flow measurement, and side water outlet connects water tank of weighing, and other side water outlet connects gutter;
The inner cylinder be one end sealing, another end opening pipe sleeve, in four-way steel pipe inner rotation, and outer diameter with It is responsible for inner diameter to be in close contact, pipe sleeve outer wall opens the slot hole of both ends semicircle intermediate rectangular;The inner cylinder connecting rod is that inner cylinder turns Dynamic transmission device, one end fix inner cylinder in back shroud, and the other end is fixed on gear centre, and the inner cylinder connecting rod passes through Back shroud sleeve, the back shroud sleeve are arranged between back shroud and gear;The gear is driven by power plant.
Preferably, the power plant includes and the ratch of engaged gears and linear high-speed cylinder;The straight line Type high-speed cylinder is the power plant for entirely dividing water instrument, is supplied to linear high-speed cylinder using air compressor machine.
Preferably, the power plant is the high-speed cylinder of 180 degree rotation, and direct geared rotate gear is described High-speed cylinder is the power plant for entirely dividing water instrument, is supplied to high-speed cylinder using air compressor machine.
Preferably, there are two signal generators for linear high-speed cylinder dress, when cylinder push-rod moves to a positioning Signal is sent out when setting.
Preferably, there are two signal generators for the high-speed cylinder dress of 180 degree rotation, when the high speed of 180 degree rotation Signal is sent out when cylinder moving is to certain position.
Preferably, it is equipped with bearing between the back shroud sleeve and gear, inner cylinder and back shroud.
Preferably, the back shroud sleeve inner, which is equipped with, prevents leak seal ring.
Preferably, central angle corresponding to the slot hole is less than 180 degree, which is used to be connected to the water outlet of four-way steel pipe.
Preferably, central angle corresponding to the slot hole is 160 degree.
Preferably, the material selection nylon or polytetrafluoroethylene (PTFE) of the inner cylinder.
The beneficial effects of the invention are as follows:A kind of to divide water instrument for the rotary of flow measurement, switch speed of the invention is not It is influenced by flow size, while can be still switched fast under big flow, so that duration is measured more accurate, it is accurate to realize It measures.
Description of the drawings
Fig. 1 is the graphics of the embodiment of the present invention;
Fig. 2 is the vertical view of the embodiment of the present invention;
Fig. 3 is the right view of the embodiment of the present invention;
Fig. 4 is the front view of the embodiment of the present invention;
Fig. 5 is inner cylinder graphics of the embodiment of the present invention;
Fig. 6 is back shroud sleeve graphics of the embodiment of the present invention;
Fig. 7 is inner cylinder link mechanism figure of the embodiment of the present invention;
Fig. 8 is that bore exports schematic diagram with four-way steel pipe in the embodiment of the present invention;
Fig. 9 is four-way steel pipe A, B of embodiment of the present invention hole aperture and inner cylinder rotating angular relationship;
Figure 10 is the electromagnetic flowmeter calibration result of the embodiment of the present invention;
In figure:1-four-way steel pipe, 2-back shrouds, 3-back shroud sleeves, 4-inner cylinders, 5-inner cylinder connecting rods, 6-bearings, 7-seal rings, 8-gears, 9-ratch, 10-linear high-speed cylinders.
Specific implementation mode
Understand for the ease of those of ordinary skill in the art and implement the present invention, with reference to the accompanying drawings and embodiments to this hair It is bright to be described in further detail, it should be understood that implementation example described herein is merely to illustrate and explain the present invention, not For limiting the present invention.
As shown in Figure 1, Figure 2 and Fig. 3, a kind of to divide water instrument for the rotary of flow measurement, including four-way steel pipe 1, back shroud 2, Back shroud sleeve 3, inner cylinder 4, inner cylinder connecting rod 5, bearing 6, seal ring 7, gear 8, ratch 9, linear high-speed cylinder 10.
It is water inlet that four-way steel pipe 1, which is responsible for the one end (inner diameter 275mm), and the other end is closed by back shroud 2, branch pipe (inner diameter 200mm) is two water outlets, and water inlet connects the pipeline for waiting for flow measurement, and side water outlet (sides A) connects water of weighing Case, other side water outlet (sides B) connects gutter, while steel pipe inner wall, through mechanical grinding, friction coefficient is very low.
Such as Fig. 5, the present embodiment uses nylon inner cylinder 4, is sealed for one end, the pipe sleeve of one end open, in four-way steel pipe 1 Portion rotates, and outer diameter is slightly less than four-way steel pipe supervisor's inner diameter, and for outer wall through mechanical grinding, friction coefficient is very low.Pipe sleeve Outer wall opens the slot hole of both ends semicircle intermediate rectangular, and central angle corresponding to hole is close and (present case is with 160 degree less than 180 degree Example), the hole is for being connected to steel pipe water outlet.In addition to nylon polytetrafluoroethylene material also can be used, wearability is more in interior cylinder material Good, friction coefficient is lower.
Such as Fig. 7, inner cylinder connecting rod 5 is the transmission device that inner cylinder 4 rotates, and one end fixes inner cylinder 4 in back shroud 2, another End is fixed on 8 center of gear, such as Fig. 6, and the inner cylinder connecting rod 5 passes through back shroud sleeve 3, the back shroud sleeve 3 setting Between back shroud 2 and gear 8;The gear 8 is driven by power plant.Between back shroud sleeve 3 and gear 8, inner cylinder with Bearing 6 is equipped between back shroud to reduce the resistance in rotation process.Sleeve inner is equipped with seal ring 7, the back shroud Sleeve 3, which is internally provided with, prevents leak seal ring 7 from preventing leak.
Such as Fig. 4, linear high-speed cylinder 10 is the power plant for entirely dividing water instrument, and linear high-speed gas is given using air compressor machine Cylinder 10 supplies.In cylinder stuffiness, the hole sides the connection B water outlet on nylon inner cylinder 4 drains water.When linear high-speed gas When the inflation of cylinder 10 pushes ratch 9, the gear 8 on inner cylinder connecting rod 5 rotates to drive nylon inner cylinder 4 to rotate together, rotational angle For 180 degree water tank of weighing is directed water at this point, the hole on nylon inner cylinder 4 is connected to the sides A water outlet.It inflates and withdraws when high-speed cylinder Same to rotate nylon inner cylinder 4 when ratch 9, the sides connection B water outlet drains water.There are two signals for the dress of linear high-speed cylinder 10 Generator sends out signal when cylinder push-rod moves to certain position.In addition to using the linear high-speed cylinder 10 of linear motion, 180 degree rotary cylinder can also be used, direct rotate gear 8, there are two signals to send out for the high-speed cylinder dress of 180 degree rotation Raw device sends out signal when the high-speed cylinder of 180 degree rotation moves to certain position.
Since inner cylinder 4 rotates, flow-shape will not be had an impact, rotational resistance is 4 outer wall of inner cylinder and four-way Friction between 1 inner wall of steel pipe, water flow impact pressure will not increase rotational resistance, thus the present invention influenced by flow size it is smaller.
According to the signal generator installed on linear high-speed cylinder 10, when record cylinder pushes, A measures the mouth of a river and starts out Open time point t1And the time point t that the sides B water outlet completely closes2;When cylinder is withdrawn, the sides B water outlet starts the time point t opened3 And A measures the time point t that the mouth of a river completely closes4
Fig. 8 and Fig. 9 gives the change procedure of water outlet aperture in inner cylinder rotation process, and horizontal axis indicates inner cylinder 4 in Fig. 9 Rotation angle, the longitudinal axis indicate the relative opening degree in the hole A, B.By taking present case size as an example, calculated according to outer barrel internal diameter and the hole A, B internal diameter Go out as shown in Figure 8 93.2 degree.In 9 pushing course of ratch, nylon inner cylinder 4 rotates, between rotating 0-33.4 degree, B Hole aperture is unchanged, and between 33.4-126.6 degree, the holes B progressively close off;And the holes A start to open at 53.4 degree, 146.6 It is fully opened when spending.Therefore when rotation 0-53.4 is spent, water is flowed out from the holes B completely, and when rotation 126.6-180 is spent, water is complete It is flowed out entirely from A skies, therefore is the switching time for dividing water instrument in the rotation 53.4-126.6 degree required time.Therefore for stroke The linear high-speed cylinder 10 of 300mm, switching time are the time moved between 89mm to 211mm.High-speed cylinder start and There are 80mm breeze ways when stopping, movement average speed is slower, and present invention design efficiently avoids the breeze way, when switching Between be much smaller than cylinder moving total time.
The holes B are completely closed in the holes B to start in the period opened, flow is flowed out from the holes A completely, which is t3- t2.And in the opening process of the holes A, switching time t2-t1, during A bore closures, switching time t4-t3.In switching time Interior, there is flow in A, B holes, to accurately calculate the time for flowing into the holes A flow, it is assumed that flow into holes water within switching time It is equal.Therefore the meter stream time can be obtained:
Assuming that the Water quality for flowing into water tank of weighing within the time is M, flow formula is:
Wherein, ρ is water body density, and t is the meter stream time.The t in practical operation3-t2In 60s or so, the holes A open and close Switching time within 0.1s.When flow fully flows into the holes A or the holes B in switching time twice, meter stream time error Maximum, is 0.1/2+0.1/2=0.1s, and precision is 1.67 ‰.But flow can not possibly fully flow into a hole, therefore ordinary circumstance Lower meter stream is accurately within 0.8 ‰.When choice accuracy is also 0.8 ‰ electronic scale, therefore theoretically device overall precision control System is within 1.5 ‰.
Figure 10 gives the practical example demarcated to electromagnetic flowmeter using the invention.Wherein, formula y= 1.31878582x-7.31281496 indicating the linear fit of the invention demarcated as a result, x represents calibration instrument flow (L/s), y Electromagnetic flowmeter flow (L/s) is represented, 1.31878582 and 7.31281496 represent the slope and intercept of linear fit, for not The same possible difference of its numerical value of embodiment.R2R represents multiple correlation coefficient in=0.99988700, which shows electromagnetism closer to 1 Linearly related degree between flowmeter flow and calibration instrument flow is closer.In the present embodiment, R2=0.99988700, table Bright precision of the present invention is higher.
Although this specification has more used four-way steel pipe 1, back shroud 2, back shroud sleeve 3, inner cylinder 4, inner cylinder connecting rod 5, the terms such as bearing 6, seal ring 7, gear 8, ratch 9, linear high-speed cylinder 10, but be not precluded using other terms can It can property.The use of these items is only for more easily describing the essence of the present invention, it is additional to be construed as any type Limitation all disagreed with spirit of that invention.
It should be understood that the part that this specification does not elaborate belongs to the prior art.
It should be understood that the above-mentioned description for preferred embodiment is more detailed, can not therefore be considered to this The limitation of invention patent protection range, those skilled in the art under the inspiration of the present invention, are not departing from power of the present invention Profit requires under protected ambit, can also make replacement or deformation, each fall within protection scope of the present invention, this hair It is bright range is claimed to be determined by the appended claims.

Claims (10)

1. a kind of dividing water instrument for the rotary of flow measurement, it is characterised in that:Including four-way steel pipe(1), back shroud(2), after Cover board sleeve(3), inner cylinder(4), inner cylinder connecting rod(5), gear(8)And power plant;
The four-way steel pipe(1)Supervisor one end be water inlet, the other end is by back shroud(2)Closing, branch pipe are two water outlets Mouthful, water inlet connects the pipeline for waiting for flow measurement, and side water outlet connects water tank of weighing, and other side water outlet connects gutter;
The inner cylinder(4)It is sealed for one end, the pipe sleeve of another end opening, in four-way steel pipe(1)Inner rotation, and outer diameter It is in close contact with supervisor's inner diameter, pipe sleeve outer wall opens the slot hole of both ends semicircle intermediate rectangular;The inner cylinder connecting rod(5)It is interior Cylinder(4)The transmission device of rotation, one end is by inner cylinder(4)Fixed back shroud(2)Interior, the other end is fixed on gear(8)Center, institute The inner cylinder connecting rod stated(5)Across back shroud sleeve(3), the back shroud sleeve(3)It is arranged in back shroud(2)With gear(8) Between;The gear(8)It is driven by power plant.
2. a kind of the rotary of flow measurement that be used for according to claim 1 divides water instrument, it is characterised in that:The power Device includes and gear(8)The ratch of occlusion(9)With linear high-speed cylinder(10);The linear high-speed cylinder(10)It is The entire power plant for dividing water instrument, linear high-speed cylinder is given using air compressor machine(10)Gas supply.
3. a kind of the rotary of flow measurement that be used for according to claim 1 divides water instrument, it is characterised in that:The power Device is the high-speed cylinder of 180 degree rotation, direct geared rotate gear(8), the high-speed cylinder is entirely to divide water instrument Power plant is supplied using air compressor machine to high-speed cylinder.
4. a kind of the rotary of flow measurement that be used for according to claim 2 divides water instrument, it is characterised in that:The straight line Type high-speed cylinder(10)There are two signal generators for dress, and signal is sent out when cylinder push-rod moves to certain position.
5. a kind of the rotary of flow measurement that be used for according to claim 3 divides water instrument, it is characterised in that:Described 180 There are two signal generators for the high-speed cylinder dress of degree rotation, are sent out when the high-speed cylinder of 180 degree rotation moves to certain position Signal.
6. a kind of the rotary of flow measurement that be used for according to claim 1 divides water instrument, it is characterised in that:The rear cover Sleeve-board cylinder(3)With gear(8), inner cylinder(4)With back shroud(2)Between be equipped with bearing(6).
7. a kind of the rotary of flow measurement that be used for according to claim 1 divides water instrument, it is characterised in that:The rear cover Sleeve-board cylinder(3)Being internally provided with prevents leak seal ring(7).
8. a kind of the rotary of flow measurement that be used for according to claim 1 divides water instrument, it is characterised in that:The slot hole Corresponding central angle is less than 180 degree, and the hole is for being connected to four-way steel pipe(1)Water outlet.
9. a kind of the rotary of flow measurement that be used for according to claim 7 divides water instrument, it is characterised in that:The slot hole Corresponding central angle is 160 degree.
10. a kind of the rotary of flow measurement that be used for according to claim 1 divides water instrument, it is characterised in that:Described is interior Cylinder(4)Material selection nylon or polytetrafluoroethylene (PTFE).
CN201510724792.1A 2015-10-29 2015-10-29 A kind of high-speed rotary for flow measurement divides water instrument Active CN105371926B (en)

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