CN103528930A - Method for measuring flow concentration of turbid water, and priming device - Google Patents
Method for measuring flow concentration of turbid water, and priming device Download PDFInfo
- Publication number
- CN103528930A CN103528930A CN201310507678.4A CN201310507678A CN103528930A CN 103528930 A CN103528930 A CN 103528930A CN 201310507678 A CN201310507678 A CN 201310507678A CN 103528930 A CN103528930 A CN 103528930A
- Authority
- CN
- China
- Prior art keywords
- muddy water
- volume
- silt
- priming device
- concentration
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Abstract
The invention relates to a method for measuring flow concentration of turbid water, and a priming device. The method comprises the following steps: (1) in a preparation stage, installing the priming device, and acquiring sediment density pS; (2) in a measurement stage, firstly, adjusting the depth and the angles of priming pipes, turning on the priming device for draining, and connecting into a volume, secondly, weighing the to-be-measured turbid water to obtain the mass M, and measuring the volume V of the to-be-measured turbid water, thirdly, calculating the density p of the turbid water and the density pW of clear water, wherein p is equal to M/V, and pW is equal to MW/VW, fourthly, calculating sediment volume concentration, and finally, calculating the flow concentration CQ which is equal to (QS.t)/(Q.t) or QS/Q or NV. The priming device comprises a priming elbow pipe, a flange arranged on a priming straight pipe in a sleeved manner, three screws evenly fixed on the lower surface of the flange in the circumferential direction, the priming straight pipe arranged below the flange in a sleeved manner, a graduation disc on the three screws, a positioning disc fixed on the priming straight pipe and arranged on the three screws in a sleeved manner, and a valve on the tail end of the priming straight pipe. The method can be widely applied to the measurement on the flow concentration of turbid water.
Description
Technical field
The present invention relates to a kind of measuring method and device, particularly about a kind of measurement muddy water flow concentration method and priming device.
Background technology
Flow concentration C
qrefer to the flow Q of the solid particle (being referred to as below silt) such as silt in muddy water
swith the ratio of muddy water total flow Q, itself and volumetric concentration C
v(silt volume V
s' and the ratio of muddy water cumulative volume V') and mass concentration C
m(Sediment quality M
sratio with muddy water gross mass M) similar, but concept is different.
In pressure flow is moving, the straight tube area that length is L is A, as supposition silt accounts for area of passage, is A
s, volumetric concentration C
v=V
s'/V'=A
sl/ (AL)=A
s/ A, i.e. volumetric concentration C
vin fact that reflection is silt area of passage A
swith the ratio of total area A, but flow concentration C
qnot only relevant with Area Ratio, and and the movement velocity v of silt
sand muddy water mean flow rate v is relevant, flow concentration C
qwith volumetric concentration C
vbetween pass be C
q=Q
s/ Q=A
sv
s/ (Av)=C
vv
s/ v, only at v
sunder the condition of=v, C
q=C
v.In mobile muddy water, because the density of the liquid such as silt and water is different, and solid cannot be from main flow, affected by water velocity size and Orientation variation etc., solid particle and water body each with different speed motions, form solid phase and two different velocity fields of liquid phase.That is to say, under most of sections, most of pressure and velocity conditions, the speed v of solid particle
sbe not equal to clear water flow velocity v
w, i.e. v
s≠ v, C
q≠ C
v.
As everyone knows, in pressure flow is moving, as there is no diverted flow and air chamber, in pressure conduit, under the constant condition of total flow, the flow Q of any flow section should equate.Expand muddy water to and flow, meeting above-mentioned condition not deposition in the situation that, the sediment discharge Q of any section
salso should equate, sediment discharge concentration C
qalso should equate.But, volumetric concentration C
vdifferent, C
v=C
q(v/v
s), at different measurement points, volumetric concentration C
vcan be because of the ratio b (b=v/v between silt speed and muddy water overall flow rate
s) different and different.And the current conventional multiple measurement of concetration modes such as ultrasonic attenuation method, photoelectric method (infra-red method) and gamma-rays method, the ratio that is silt volume and muddy water cumulative volume (or Sediment quality and muddy water gross mass) on a certain duct length of measuring, is volumetric concentration C
v(as what measure, be mass concentration C
m, can measure definite silt density p
swith clear water density p
wafter be scaled volumetric concentration, C
v=C
mρ
s/ (ρ
s-C
mρ
s+ C
mρ
w)).
With regard to the measurement of sediment concentration, also exist at present two problems urgently to be resolved hurrily: the one, volumetric concentration C
vdifferent because measuring section, the volumetric concentration C of any one section
vall cannot represent the concentration in whole pressure conduit; The 2nd, although flow concentration C
qcan keep each section to equate, also can represent concentration in pressure conduit, but also there is no at present measuring method and instrument and equipment.Therefore, be necessary to provide a kind of measuring flow concentration C
qmethod.
Summary of the invention
For the problems referred to above, the object of this invention is to provide measurement volumes concentration under a kind of hydrostatic state is muddy water flow concentration method and the priming device of known flow concentration.
For achieving the above object, the present invention takes following technical scheme: a kind of measurement muddy water flow concentration method, and it comprises the following steps: the 1) preparatory stage: 1. priming device is installed: priming device is mounted on Velocity of Muddy Water Delivery in Pipeline; 2. obtain silt density p
s: first, weigh the Sediment quality M as husky sample
s, and put into a container, measure clear water volume V
w, pour in described container, stir into muddy water; Secondly, measure the muddy water volume V obtaining, calculate silt volume V in muddy water
s=V-V
w; Finally, calculate silt density p
s=M
s/ V
s; 2) test phase: step that measure to calculate various mineral types and mineral matter ratio and step 1) is the silt volumetric concentration in the basically identical muddy water of described husky sample 2., and calculated flow rate concentration: 1. adjust the aqueduct degree of depth and angle, open priming device and carry out draining, and access in a container; 2. weigh muddy water mass M to be measured, measure the volume V of muddy water to be measured; 3. calculate muddy water density p=M/V and clear water density p
w=M
w/ V
w; 4. calculate and obtain silt volumetric concentration
5. calculated flow rate concentration
Described step 2) the silt volumetric concentration in
derivation as follows:
Silt is shared volume V in muddy water
sfor:
V
S＝V-V
W （1）
And silt density p in muddy water
savailable following formula calculates:
ρ
s＝M
s/V
s （2）
In muddy water, between Sediment quality and clear water quality, there is following relation:
ρ·V=ρ
S·V
S+ρ
W·V
W （3）
And silt volume can be expressed as:
V
S＝N
V·V （4）
Clear water volume can be expressed as:
V
W＝V-V
S （5）
Formula (4) and formula (5) are distinguished to substitution formula (3):
ρ·V＝ρ·N
V·V+ρ
W(V-N
V·V) （6）
After being simplified to processing, formula (6) can obtain silt volumetric concentration N
v:
While obtaining Sediment quality and muddy water quality to be measured, adopt the acquisition of weighing of standard weighing-appliance; While obtaining clear water volume and muddy water volume, adopt the orthobaric volume bucket metering of metered volume to obtain.
A kind of priming device, it is characterized in that: it comprises an aqueduct, one is set in the flange on described aqueduct, three edges are circumferentially evenly fixed on the screw rod of described flange lower surface, one is set in the described aqueduct of described flange below and the dial disc on three described screw rods, one is fixed on described aqueduct and is set in three positioning discs on described screw rod, and a valve being arranged on described aqueduct end.
Described aqueduct is comprised of diversion bend pipe and diversion straight tube, and described diversion bend pipe adopts arc transition with the mutually vertical ，Qie of described diversion straight tube corner; The diameter ratio of described diversion bend pipe length and described aqueduct is at least 5:1; The hose nozzle of described diversion bend pipe is sharp-pointed blade-like; Described aqueduct is stainless-steel tube.
Described dial disc lower surface is provided with angle groove, and the angular range of described angle groove is at-15 °～15 °.
Described positioning disc is provided with the deep-slotted chip breaker that three radial width are a bit larger tham described screw rod external diameter; The angle groove position of the corresponding described dial disc of described positioning disc outer ledge is provided with pointer.
Described flange is set on described diversion straight tube, and an O RunddichtringO is set between described flange and diversion straight tube seals; Described positioning disc is close to the three pairs of nuts by both sides of dial disc and described positioning disc described in described dial disc lower surface and is fixed on described screw rod.
The present invention is owing to taking above technical scheme, it has the following advantages: 1, the present invention is owing to adopting aqueduct water inlet pipe mouth to be designed to sharp-pointed blade-like and directly aiming at flow path direction, guaranteed can all flow in priming device by the muddy water flow of aqueduct water inlet pipe mouth area, and flowed in water receiving container.2, owing to measuring the volumetric concentration N of muddy water under static condition
vprecision is higher, and the muddy water volumetric concentration N receiving within certain period
vbe the flow concentration C of touchdown point in pressure conduit
q, therefore can realize high-acruracy survey flow concentration C
q.3,, because diversion bend pipe length is greater than aqueduct diameter more than 5 times, therefore effectively avoid diversion straight tube line up place incoming flow to exert an influence.4, because aqueduct both can move forward and backward along X-axis, can rotate along X-axis again, therefore make aqueduct can be placed in velocity flow profile and evenly locate to measure section average discharge concentration, can be placed in again special-shaped section and measure local flow concentration, the Changing Pattern of flow concentration when inquire into that runner turns round, spreads, contraction etc. changes.5, the flow concentration C that can measure by the present invention
qand the volumetric concentration C measuring
v, flow Q and cross-sectional area A calculate silt flow velocity v
sand clear water flow velocity v
w.
Accompanying drawing explanation
Fig. 1 is priming device application state diagrammatic cross-section of the present invention
Fig. 2 is that the A of Fig. 1 is to schematic diagram
Fig. 3 is that the B of Fig. 1 is to schematic diagram
Embodiment
Below in conjunction with drawings and Examples, the present invention is described in detail.
As shown in Figure 1, priming device of the present invention comprises aqueduct 1, flange 2, screw rod 3, dial disc 4, positioning disc 5 and valve 6.
Wherein, aqueduct 1 is comprised of diversion bend pipe 7 and diversion straight tube 8 two parts, and diversion bend pipe 7 is mutually vertical with diversion straight tube 8, and corner adopts arc transition.Flange 2 is set on diversion straight tube 8, and an O RunddichtringO 9 is set between flange 2 and diversion straight tube 8 seals, and prevents that muddy water from oozing out.Three screw rods 3 are being positioned at flange 2 lower surfaces of diversion straight tube 8 peripheries along circumferential uniform welding.
As shown in Figure 1 and Figure 2, the center of dial disc 4 offers the center pit that is a bit larger tham diversion straight tube 8 external diameters, the periphery of center pit offers three unthreaded holes that are a bit larger tham screw rod 3 external diameters, and three unthreaded holes are corresponding with three screw rods 3, and dial disc 4 lower surfaces are carved with angle groove 10.Dial disc 4 correspondences are set on the diversion straight tube 8 and screw rod 3 of flange 2 belows, and dial disc 4 can endwisely slip along diversion straight tube 8.
As shown in Figure 1, Figure 3, the center of positioning disc 5 offers the center pit that is a bit larger tham diversion straight tube 8 external diameters, and the periphery of center pit offers the deep-slotted chip breaker 11 that three radial width are a bit larger tham screw rod 3 external diameters, and three deep-slotted chip breakers 11 are corresponding with three screw rods 3.Positioning disc 5 next-door neighbour dial disc 4 lower surfaces are set on diversion straight tube 8 and screw rod 3, and the center pit of positioning disc 5 and diversion straight tube 8 be welded and fixed, and dial disc 4 and positioning disc 5 are fixed on screw rod 3 by three pairs of lock nut 13 of both sides.Meanwhile, in angle groove 10 positions of the corresponding dial disc 4 of positioning disc 5 outer ledges, be provided with pointer 12.Valve 6 is arranged on the end that approaches diversion straight tube 8.
In a preferred embodiment, aqueduct 1 is stainless-steel tube.
In a preferred embodiment, the diameter ratio of diversion bend pipe 7 length and aqueduct 1 is at least 5:1.
In a preferred embodiment, the hose nozzle of diversion bend pipe 7 is sharp-pointed blade-like.
In a preferred embodiment, the angular range of angle groove 10 is at-15 °～15 °.
The principle of the inventive method is as follows: supposition aqueduct 1 orifice area is A, the muddy water total flow of crossing area A be Q wherein sediment discharge be Q
s, flow concentration C
q=Q
s/ Q.The water receiving time by priming device is length no matter, and the time of access silt and clear water is all t.Therefore the volumetric concentration N of silt in the muddy water of, receiving in the period at t
v=(Q
st)/(Qt)=Q
s/ Q=C
q, obviously, adopt and meet the volumetric concentration N that stream water receiving method is guided in container and measure muddy water under hydrostatic state
vnot the volumetric concentration C of muddy water in pipeline
v, but the flow concentration C of muddy water in pipeline
q.That is to say the muddy water volumetric concentration N measuring under hydrostatic state
vflow concentration C for muddy water
q.
First by measurement, do husky mass M
s, clear water volume V
wand the two mixes the method for rear muddy water volume V, then calculative determination silt density p
s.Obtain silt density p
safterwards, then by actual measurement or demarcation, measurement each point muddy water density p, clear water density p
w, calculate and obtain corresponding silt volumetric concentration N
v, i.e. the flow concentration C of known muddy water
q.
Silt is shared volume V in muddy water
sfor:
V
S＝V-V
W （1）
And silt density p in muddy water
savailable following formula calculates:
ρ
s＝M
s/V
s （2）
In muddy water, between Sediment quality and clear water quality, there is following relation:
ρ·V=ρ
S·V
S+ρ
W·V
W （3）
And silt volume can be expressed as:
V
S＝N
V·V （4）
Clear water volume can be expressed as:
V
W＝V-V
S （5）
Formula (4) and formula (5) are distinguished to substitution formula (3):
ρ·V＝ρ·N
V·V+ρ
W(V-N
V·V) （6）
After being simplified to processing, formula (6) can obtain silt volumetric concentration N
v:
Because of the muddy water volumetric concentration N measuring under hydrostatic state
vflow concentration C for muddy water
q, i.e. N
vequal the flow concentration C of muddy water
q.Therefore, calculate and obtain corresponding silt volumetric concentration N
v, i.e. the flow concentration C of known muddy water
q.
According to the priming device providing in above-described embodiment, the inventive method comprises the following steps:
1) preparatory stage:
1. Installation and Debugging priming device
The pipe flange 15 that design processing and priming device match on ducting side wall 14.By the corresponding pipe flange 15 of the flange of priming device 2, centre adds sealing gasket 16, by some bolts 17, is fixedly mounted on ducting side wall 14.
2. measure and calculate sample silt density p
s
Sand grain is mixed thoroughly, and the sand grain of getting on demand certain mass is dried, and with balance or other high precision balance and weighing device, weighs Sediment quality M after required oven dry
s.The silt that scale is crossed to quality all add can the orthobaric volume bucket of metered volume in, will measure volume V
wclear water pour in regular barrel, stir, silt and clear water are fully merged, until sand grain is around without bubble.Measure muddy water volume V, by formula V
s=V-V
wcalculate solid particle shared volume V in muddy water of silt or identical mineral matter
s, by formula ρ
s=M
s/ V
scalculate silt density p
s.
For improving measuring accuracy, should make muddy water volume V approach volume bucket full scale as far as possible, and select high as far as possible measurement of concetration ρ
s, but must guarantee that solid particle is fully blended in water, there is no bubble, muddy water can flow, and automatically keeps free, the horizontal water surface.
2) test phase: measure muddy water density p and clear water density p
w, calculative determination muddy water flow concentration C
q
1. according to measuring position, need to adjust the degree of depth (along X-direction) that aqueduct 1 inserts pipeline, because aqueduct 1 is welded on positioning disc 5, therefore as long as rotational positioning disk 5 is the angle of capable of regulating aqueduct 1 and Y-axis, make diversion bend pipe 7 entrances aim at flow path direction, and the angle groove 10 that can arrange at dial disc 4 lower surfaces by the pointer 12 arranging on positioning disc 5 is observed the anglec of rotation.Until aqueduct 1 entrance, aim at after flow path direction, by tightening dial disc 4 and positioning disc 5 both sides lock nut 13 by aqueduct 1 lock in place.Open the valve 6 of priming device outlet side, after draining a period of time with water receiving container or orthobaric volume bucket water receiving, to rapid-closure damper 6 after needs volume.
2. measure muddy water volume V and mass M, calculate muddy water density p;
3. measure the clear water density p identical with muddy water temperature
w;
4. through type
calculate silt volumetric concentration N
v;
5. through type
Calculated flow rate concentration C
q.
For different sediment discharge concentration C
qmeasurement, only need repeat above-mentioned five steps.
By the flow concentration C of gained
q, measure the volumetric concentration C of muddy water
v, flow Q, cross-sectional area A, also can calculate silt flow velocity v
sand clear water flow velocity v
w, its computing formula is: muddy water flow velocity v
s=Q/A, silt speed v
s=
vc
q/ C
v, clear water flow velocity v
w=(v-v
sc
v)/(1-C
v).
The various embodiments described above are only for illustrating method of the present invention and embodiment and priming device; concrete implementation step and the detailed rules and regulations of each phase measuring all can change to some extent; on the basis of technical solution of the present invention; all improvement and conversion of indivedual implementation methods and equipment being carried out according to the principle of the invention, all should not get rid of outside protection scope of the present invention.
Claims (8)
1. measure a muddy water flow concentration method, it comprises the following steps:
1) preparatory stage:
1. priming device is installed
Priming device is mounted on Velocity of Muddy Water Delivery in Pipeline;
2. obtain silt density p
s
First, weigh the Sediment quality M as husky sample
s, and put into a container, measure clear water volume V
w, pour in described container, stir into muddy water;
Secondly, measure the muddy water volume V obtaining, calculate silt volume V in muddy water
s=V-V
w;
Finally, calculate silt density p
s=M
s/ V
s;
2) test phase: step that measure to calculate various mineral types and mineral matter ratio and step 1) is the silt volumetric concentration in the basically identical muddy water of described husky sample 2., and calculated flow rate concentration
1. adjust the aqueduct degree of depth and angle, open priming device and carry out draining, and access in a container;
2. weigh muddy water mass M to be measured, measure the volume V of muddy water to be measured;
3. calculate muddy water density p=M/V and clear water density p
w=M
w/ V
w;
4. calculate and obtain silt volumetric concentration
5. calculated flow rate concentration
2. a kind of measurement muddy water flow concentration method as claimed in claim 1, is characterized in that: the silt volumetric concentration described step 2)
derivation as follows:
Silt is shared volume V in muddy water
sfor:
V
S＝V-V
W （1）
And silt density p in muddy water
savailable following formula calculates:
ρ
s＝M
s/V
s （2）
In muddy water, between Sediment quality and clear water quality, there is following relation:
ρ·V=ρ
S·V
S+ρ
W·V
W （3）
And silt volume can be expressed as:
V
S＝N
V·V （4）
Clear water volume can be expressed as:
V
W＝V-V
S （5）
Formula (4) and formula (5) are distinguished to substitution formula (3):
ρ·V＝ρ·N
V·V+ρ
W(V-N
V·V) （6）
After being simplified to processing, formula (6) can obtain silt volumetric concentration N
v:
3. a kind of measurement muddy water flow concentration method as claimed in claim 1, is characterized in that: while obtaining Sediment quality and muddy water quality to be measured, adopt the acquisition of weighing of standard weighing-appliance; While obtaining clear water volume and muddy water volume, adopt the orthobaric volume bucket metering of metered volume to obtain.
4. a priming device, it is characterized in that: it comprises an aqueduct, one is set in the flange on described aqueduct, three edges are circumferentially evenly fixed on the screw rod of described flange lower surface, one is set in the described aqueduct of described flange below and the dial disc on three described screw rods, one is fixed on described aqueduct and is set in three positioning discs on described screw rod, and a valve being arranged on described aqueduct end.
5. a kind of priming device as claimed in claim 4, is characterized in that: described aqueduct is comprised of diversion bend pipe and diversion straight tube, and described diversion bend pipe adopts arc transition with the mutually vertical ，Qie of described diversion straight tube corner; The diameter ratio of described diversion bend pipe length and described aqueduct is at least 5:1; The hose nozzle of described diversion bend pipe is sharp-pointed blade-like; Described aqueduct is stainless-steel tube.
6. a kind of priming device as described in claim 4 or 5, is characterized in that: described dial disc lower surface is provided with angle groove, and the angular range of described angle groove is at-15 °～15 °.
7. a kind of priming device as claimed in claim 6, is characterized in that: described positioning disc is provided with the deep-slotted chip breaker that three radial width are a bit larger tham described screw rod external diameter; The angle groove position of the corresponding described dial disc of described positioning disc outer ledge is provided with pointer.
8. a kind of priming device as claimed in claim 5, is characterized in that: described flange is set on described diversion straight tube, and an O RunddichtringO is set between described flange and diversion straight tube seals; Described positioning disc is close to the three pairs of nuts by both sides of dial disc and described positioning disc described in described dial disc lower surface and is fixed on described screw rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310507678.4A CN103528930B (en) | 2013-10-24 | 2013-10-24 | A kind of measurement muddy water flow concentration method and priming device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310507678.4A CN103528930B (en) | 2013-10-24 | 2013-10-24 | A kind of measurement muddy water flow concentration method and priming device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103528930A true CN103528930A (en) | 2014-01-22 |
| CN103528930B CN103528930B (en) | 2016-03-02 |
Family
ID=49931121
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310507678.4A Active CN103528930B (en) | 2013-10-24 | 2013-10-24 | A kind of measurement muddy water flow concentration method and priming device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103528930B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110006511A (en) * | 2019-04-19 | 2019-07-12 | 长江水利委员会水文局 | A kind of river pressure type water gauge measured water level correction method |
| CN113218804A (en) * | 2021-04-23 | 2021-08-06 | 龙蟒佰利联集团股份有限公司 | Rapid test and calculation method for concentration of titanium dioxide slurry |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030230150A1 (en) * | 2002-03-14 | 2003-12-18 | Wolfgang Drahm | Transducer and method for measuring a fluid flowing in a pipe |
| CN103134942A (en) * | 2013-02-08 | 2013-06-05 | 清华大学 | Synchronous real-time measurement device with sand-containing concentration and muddy water flow velocity vertically distributed |
-
2013
- 2013-10-24 CN CN201310507678.4A patent/CN103528930B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030230150A1 (en) * | 2002-03-14 | 2003-12-18 | Wolfgang Drahm | Transducer and method for measuring a fluid flowing in a pipe |
| CN103134942A (en) * | 2013-02-08 | 2013-06-05 | 清华大学 | Synchronous real-time measurement device with sand-containing concentration and muddy water flow velocity vertically distributed |
Non-Patent Citations (1)
| Title |
|---|
| 徐洪泉: "水力机械浑水试验中的浓度和水头问题", 《水泵技术》, 28 February 1994 (1994-02-28) * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110006511A (en) * | 2019-04-19 | 2019-07-12 | 长江水利委员会水文局 | A kind of river pressure type water gauge measured water level correction method |
| CN113218804A (en) * | 2021-04-23 | 2021-08-06 | 龙蟒佰利联集团股份有限公司 | Rapid test and calculation method for concentration of titanium dioxide slurry |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103528930B (en) | 2016-03-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107976223A (en) | A kind of high accuracy leakage amount detector | |
| CN104458107B (en) | A kind of detection method of easy differential pressure device | |
| CN203811492U (en) | Closed type pipeline cycle erosion test device | |
| Mattingly | Volume flow measurements | |
| CN103528930B (en) | A kind of measurement muddy water flow concentration method and priming device | |
| CN101393232A (en) | By-pass flow speed flowmeters | |
| FI122767B (en) | Method and apparatus for calibrating a flow meter | |
| CN107576361A (en) | A kind of heavy caliber pipeline flow measurement device based on LDV | |
| Eichler et al. | Flow development behind a swirl generator in a hot-water standard measuring facility for large volume rates | |
| Wang et al. | HEAD LOSS AT MANHOLES IN SURCHARGED SEWER SYSTEMS 1 | |
| CN111174875A (en) | On-line calibration method of open channel flowmeter on water delivery channel with closed straight pipe section | |
| CN207499826U (en) | One kind is with brill mud flow rate monitoring device | |
| CN103528922B (en) | The dynamic silt methods of volume concentration of a kind of measurement and device | |
| Tezuka et al. | Assessment of effects of pipe surface roughness and pipe elbows on the accuracy of meter factors using the ultrasonic pulse Doppler method | |
| Morrison et al. | Evaluation of a close coupled slotted orifice, electric impedance, and swirl flow meters for multiphase flow | |
| CN208536934U (en) | A kind of drainage type ultrasonic instrument | |
| CN103674188A (en) | On-line flow calibration method for oilfield flooding system | |
| CN110186523B (en) | Method for measuring dynamic flow of liquid by differential pressure type flowmeter | |
| Wang et al. | Study of transducer installation effects on ultrasonic flow metering using computational fluid dynamics | |
| Waluś | Mathematical modelling of an ultrasonic flowmeter primary device | |
| CN207407969U (en) | A kind of Liqiud-gas mixing device for being used to measure precession spiral flowmeter precision | |
| Zhang et al. | Analysis of flow characteristics and flow measurement accuracy of elbow with different diameters | |
| CN104792376A (en) | Flow measurement device based on heat flux principle | |
| CA2739587A1 (en) | Method and apparatus for measuring the density of a flowing fluid in a conduit using differential pressure | |
| RU2679462C1 (en) | Method of research of injection wells |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |