CN111044407A - Non-contact passive pipeline medium density measurement method - Google Patents
Non-contact passive pipeline medium density measurement method Download PDFInfo
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- CN111044407A CN111044407A CN202010052096.1A CN202010052096A CN111044407A CN 111044407 A CN111044407 A CN 111044407A CN 202010052096 A CN202010052096 A CN 202010052096A CN 111044407 A CN111044407 A CN 111044407A
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- 238000000034 method Methods 0.000 title claims abstract description 23
- 238000001739 density measurement Methods 0.000 title claims description 8
- 238000005303 weighing Methods 0.000 claims abstract description 44
- 238000005259 measurement Methods 0.000 claims abstract description 15
- 230000005641 tunneling Effects 0.000 claims abstract description 11
- 230000005484 gravity Effects 0.000 claims abstract description 10
- 230000008569 process Effects 0.000 claims abstract description 6
- 239000002002 slurry Substances 0.000 claims description 41
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 22
- 239000007788 liquid Substances 0.000 abstract description 7
- 238000010276 construction Methods 0.000 abstract description 4
- 230000008859 change Effects 0.000 abstract description 3
- 238000006243 chemical reaction Methods 0.000 abstract description 3
- 238000009412 basement excavation Methods 0.000 description 4
- 238000009434 installation Methods 0.000 description 4
- 230000002285 radioactive effect Effects 0.000 description 4
- 230000005251 gamma ray Effects 0.000 description 2
- 230000036541 health Effects 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N9/00—Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity
- G01N9/02—Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity by measuring weight of a known volume
- G01N9/04—Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity by measuring weight of a known volume of fluids
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- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
The invention discloses a non-contact passive pipeline medium density measuring method, which solves the problem that the liquid density in a tunnel construction pipeline is difficult to measure in the prior art. The weight of the target pipeline is measured through the weighing module, simple programming conversion is carried out by utilizing a density calculation formula, the density of liquid in the target pipeline is output, and meanwhile, the influence on the measurement precision due to the change of the gravity center in the process of up-down slope tunneling of the shield tunneling machine or the inclination of the mounting surface is effectively avoided through the limiting device, so that the measurement precision is improved. The method can accurately and reliably monitor the density of the medium in the pipeline in real time, and has low measurement cost.
Description
Technical Field
The invention relates to the technical field of pipeline medium density measurement, in particular to a non-contact passive pipeline medium density measurement method.
Background
With the rapid development of economic construction and the advance of urbanization in China, tunnel boring machines are adopted for more and more urban tunnel constructions. Generally, a slurry balance shield machine is mostly adopted due to the complex urban strata and the numerous surface buildings. The slurry balance shield machine mainly balances the soil-water pressure of the excavation surface by the slurry pressure so as to keep the stability of the excavation surface. And the mud film formed on the tunnel face can reduce the pressure loss of the excavation face, so that the mud pressure effectively acts on the excavation face. However, the mud weight is a key factor affecting the quality of the mud film, so that the mud film needs to be monitored in real time. At present, a radioactive densimeter is mainly adopted for measuring the specific gravity of the slurry feeding and discharging on a slurry balance shield machine at home and abroad. The densimeter has radioactive source and probe installed oppositely to two sides of pipeline, and measures the density of liquid in pipeline through the attenuation of gamma ray produced by the radioactive source after being absorbed correspondingly. The method can accurately measure the density of the liquid in the pipeline, but has the advantages of higher price, complex installation, higher gamma ray frequency released by the radioactive densitometer, extremely strong penetrating power and great harm to the surrounding environment and the human health. Therefore, it is important to develop a new method for measuring the density of the inlet and outlet slurry.
Disclosure of Invention
Aiming at the defects in the background technology, the invention provides a non-contact passive pipeline medium density measuring method, which solves the problem that the liquid density in a tunnel construction pipeline is difficult to measure in the prior art.
The technical scheme of the invention is realized as follows: a non-contact passive pipeline medium density measuring method comprises the following steps:
s1: selecting a section of long straight hard pipe of the slurry pipeline as a target pipeline;
s2: weighing modules with the same measuring range are symmetrically arranged at the front end and the rear end of the target pipeline in a left-right mode, and the weighing modules are stably fixed on the target pipeline through a limiting device;
s3: measuring the density of air in the target pipeline under the empty pipe state of the target pipeline, transmitting a measuring signal to an upper computer by a weighing module, and marking an output result to be 0 by the upper computer;
s4: measuring the density of a medium in the target pipeline under the state that the target pipeline is filled with water, transmitting a measurement signal to an upper computer by a weighing module, and marking an output result to be 1 by the upper computer;
s5: during normal tunneling of the shield tunneling machine, the target pipeline is filled with slurry, the weighing module transmits a measurement signal to the upper computer, and the upper computer processes and calculates the signal and monitors the specific gravity of the slurry in the target pipeline in real time.
The weighing module is four weighing sensors with the same measuring range, the weighing sensors are limited on the target pipeline through the limiting device, and the gravity center of the target pipeline is located on the perpendicular bisector of the two weighing sensors on the same end face.
At step S3, according to ρAir conditioner= m/V, demarcating the density rho of the target pipeline mediumAir conditioner(ii) a Wherein V is the volume in the target pipeline, and m is the mass of the target pipeline measured by the weighing module.
At step S4, according to ρWater (W)=mWater (W)V, calibrating the medium density rho of the target pipelineWater (W)(ii) a Where V is the target pipeline internal volume, mWater (W)The total mass of the target pipeline in the water-filled state measured by the weighing module.
In step S5, according to ρ = mSlurry compositionV, determining the density rho of the mud in the target pipeline, wherein mSlurry composition= M-M; v is the volume in the target pipeline, M is the total mass of the target pipeline in a slurry-filled state measured by the weighing module, MSlurry compositionIs the total mass of slurry in the target pipe in a slurry filled state.
The weight of the target pipeline is measured through the non-contact weighing module, simple programming conversion is carried out by utilizing a density calculation formula, the density of liquid in the target pipeline is output, and meanwhile, the influence on the measurement precision caused by the inclination of an installation surface or the change of the gravity center in the process of up-slope and down-slope tunneling of the shield tunneling machine is effectively avoided through the limiting device, so that the measurement precision is improved. The method can accurately and reliably monitor the density of the medium in the pipeline in real time, and has the advantages of low measurement cost, convenient installation, environmental protection, health and higher popularization value.
Drawings
In order to illustrate the embodiments of the invention more clearly, the drawings that are needed in the description of the embodiments will be briefly described below, it being apparent that the drawings in the following description are only some embodiments of the invention, and that other drawings may be derived from those drawings by a person skilled in the art without inventive effort.
FIG. 1 is a schematic view of the arrangement of the weighing module of the present invention on a target pipeline.
FIG. 2 is a schematic cross-sectional view of a target pipeline of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive effort based on the embodiments of the present invention, are within the scope of the present invention.
The embodiment discloses a non-contact passive pipeline medium density measuring method, which comprises the following steps:
s1: now, the slurry inlet and outlet liquid density of the slurry shield machine is taken as an example, but the measurement is not limited to the range. In a long slurry inlet and outlet pipeline, a long straight hard pipe of the slurry pipeline is selected as a target pipeline 1, and two ends of the pipeline are connected with a hose 4, as shown in fig. 1.
S2: weighing modules 2 with the same measuring range are symmetrically arranged at the front end and the rear end of the target pipeline 1; the upper end and the lower end of the weighing module are respectively and stably fixed on the target pipeline and the trailer through a bottom plate and bolts, and the limiting devices are fixed at the front end and the rear end of the weighing module. The weighing modules are four weighing sensors with the same measuring range, two weighing sensors are symmetrically arranged at the front end of the target pipeline 1 in the left-right direction, two weighing sensors are symmetrically arranged at the rear end of the target pipeline in the left-right direction, and the weighing sensors are limited on the target pipeline through a limiting device 3, so that the gravity center of the target pipeline is positioned on the perpendicular bisector of the two weighing sensors on the same end surface; the influence on the measurement precision caused by the change of the gravity center in the process of the shield tunneling machine going up and down the slope or the inclination of the installation surface is avoided. The limiting device can adopt a supporting plate seat or other positioning devices with the aligning function. As shown in fig. 2.
S3: measuring the density of air in the target pipeline under the empty pipe state of the target pipeline (at the moment, the target pipeline is filled with air), transmitting a measurement signal to an upper computer by a weighing module, and marking an output result to be 0 by the upper computer; the volume of the target pipeline is known, the weight of the target pipeline measured by the weighing module is used for obtaining the medium density of the target pipeline by using a density calculation formula, and the state is a calibration zero state.
S4: measuring the density of a medium in the target pipeline under the state that the target pipeline is filled with water, transmitting a measurement signal to an upper computer by a weighing module, and marking an output result to be 1 by the upper computer; the volume of the target pipeline is known, the weight of the target pipeline and water measured by the weighing module is used for obtaining the medium density of the target pipeline by using a density calculation formula, and the state is a calibrated '1' state.
S5: during normal tunneling of the shield tunneling machine, the target pipeline is filled with slurry, the weighing module transmits a measurement signal to the upper computer, and the upper computer processes and calculates the signal and monitors the specific gravity of the slurry in the target pipeline in real time. The weight of the target pipeline and the weight of the slurry inside the target pipeline are measured, simple programming conversion is carried out by using a density calculation formula, the density of a medium (slurry) in the target pipeline is obtained, and a 4-20 mA signal is output and fed back to an upper computer to carry out real-time monitoring on the density of the slurry in the pipeline.
Further, at step S3, according to ρAir conditioner= m/V, demarcating the density rho of the target pipeline mediumAir conditionerI.e. the mass of air; wherein V is the volume in the target pipeline, and m is the mass of the target pipeline measured by the weighing module.
At step S4, according to ρWater (W)=mWater (W)V, calibrating the density rho of the medium in the target pipelineWater (W)I.e. the density of water, mWater (W)V is the total mass of the target pipe in the water-filled state measured by the weighing module, and V is the volume inside the target pipe. Calibrating the target pipeline medium density rho according to the steps S3 and S4Air conditionerρWater (W)And determining that the target pipeline is in a normal state.
In step S5, according to ρ = mSlurry compositionV, determining the density rho of the mud in the target pipeline, wherein mSlurry composition= M-M; m is the total mass M of the target pipeline in a slurry filling state measured by the weighing moduleSlurry compositionIs the total mass of slurry in the target pipe in a slurry filled state. Thus, the density of the medium (slurry) in the target pipeline is obtained, and the output signal is fed back to the upper computer to carry out real-time monitoring on the density of the slurry in the pipeline.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (5)
1. A non-contact passive pipeline medium density measuring method is characterized in that: the method comprises the following steps:
s1: selecting a section of long straight hard pipe of the slurry pipeline as a target pipeline;
s2: weighing modules with the same measuring range are symmetrically arranged at the front end and the rear end of the target pipeline in a left-right mode, and the weighing modules are stably fixed on the target pipeline through a limiting device;
s3: measuring the density of air in the target pipeline under the empty pipe state of the target pipeline, transmitting a measuring signal to an upper computer by a weighing module, and marking an output result to be 0 by the upper computer;
s4: measuring the density of a medium in the target pipeline under the state that the target pipeline is filled with water, transmitting a measurement signal to an upper computer by a weighing module, and marking an output result to be 1 by the upper computer;
s5: during normal tunneling of the shield tunneling machine, the target pipeline is filled with slurry, the weighing module transmits a measurement signal to the upper computer, and the upper computer processes and calculates the signal and monitors the specific gravity of the slurry in the target pipeline in real time.
2. The non-contact passive pipe media density measurement method of claim 1, wherein: the weighing module is four weighing sensors with the same measuring range, the weighing sensors are limited on the target pipeline through the limiting device, and the gravity center of the target pipeline is located on the perpendicular bisector of the two weighing sensors on the same end face.
3. The non-contact passive pipe media density measurement method of claim 1 or 2, wherein: at step S3, according to ρAir conditioner= m/V, demarcating the density rho of the target pipeline mediumAir conditioner；
Wherein m is the mass of the target pipeline measured by the weighing module, and V is the volume in the target pipeline.
4. The non-contact passive pipe media density measurement method of claim 3, wherein: at step S4, according to ρWater (W)=mWater (W)V, calibrating the medium density rho of the target pipelineWater (W)(ii) a Where V is the target pipeline internal volume, mWater (W)The total mass of the target pipeline in the water-filled state measured by the weighing module.
5. The non-contact passive pipe media density measurement method of claim 4, wherein:
in step S5, according to ρ = mSlurry compositionV, determining the density rho of the mud in the target pipeline,
wherein V is the target pipeline internal volume, mSlurry composition= M-M; m is a weighing moduleThe total mass m of the target pipeline in the state of being filled with the slurry is obtainedSlurry compositionIs the total mass of slurry in the target pipe in a slurry filled state.
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4677851A (en) * | 1986-02-10 | 1987-07-07 | Mcauley James A | Method and apparatus for monitoring the density of a liquid |
| US20030051547A1 (en) * | 2001-09-14 | 2003-03-20 | Brian Ence | Device for measuring density of material flowing in a conveying duct |
| CN101685057A (en) * | 2008-09-27 | 2010-03-31 | 宝山钢铁股份有限公司 | Non-contact solution concentration detection method and device thereof |
| CN101832900A (en) * | 2010-04-16 | 2010-09-15 | 贺洪江 | Gravimetric densimeter of flow liquid in pipelines and liquid density measuring method thereof |
| CN202421010U (en) * | 2012-02-23 | 2012-09-05 | 贺洪江 | Weighing liquid density meter |
| CN106442216A (en) * | 2016-08-30 | 2017-02-22 | 浙江天蓝环保技术股份有限公司 | Online tubular density measurement device and liquid density measurement method |
| CN209182194U (en) * | 2018-12-11 | 2019-07-30 | 邸达 | A kind of weighing type density meter |
-
2020
- 2020-01-17 CN CN202010052096.1A patent/CN111044407A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4677851A (en) * | 1986-02-10 | 1987-07-07 | Mcauley James A | Method and apparatus for monitoring the density of a liquid |
| US20030051547A1 (en) * | 2001-09-14 | 2003-03-20 | Brian Ence | Device for measuring density of material flowing in a conveying duct |
| CN101685057A (en) * | 2008-09-27 | 2010-03-31 | 宝山钢铁股份有限公司 | Non-contact solution concentration detection method and device thereof |
| CN101832900A (en) * | 2010-04-16 | 2010-09-15 | 贺洪江 | Gravimetric densimeter of flow liquid in pipelines and liquid density measuring method thereof |
| CN202421010U (en) * | 2012-02-23 | 2012-09-05 | 贺洪江 | Weighing liquid density meter |
| CN106442216A (en) * | 2016-08-30 | 2017-02-22 | 浙江天蓝环保技术股份有限公司 | Online tubular density measurement device and liquid density measurement method |
| CN209182194U (en) * | 2018-12-11 | 2019-07-30 | 邸达 | A kind of weighing type density meter |
Non-Patent Citations (2)
| Title |
|---|
| 王魁汉 等: "《工业过程检测技术》", 30 June 1992, 中国仪器仪表学会过程检测控制仪表学会, pages: 339 - 341 * |
| 艾光华 等: "《铜矿选矿技术与实践》", 31 December 2017, 冶金工业出版社, pages: 95 - 96 * |
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Application publication date: 20200421 |
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