CN108302328B - A kind of line clogging level calculating method - Google Patents
A kind of line clogging level calculating method Download PDFInfo
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- CN108302328B CN108302328B CN201710017082.4A CN201710017082A CN108302328B CN 108302328 B CN108302328 B CN 108302328B CN 201710017082 A CN201710017082 A CN 201710017082A CN 108302328 B CN108302328 B CN 108302328B
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- pressure
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- static pressure
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D5/00—Protection or supervision of installations
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- G—PHYSICS
- G16—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR SPECIFIC APPLICATION FIELDS
- G16Z—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR SPECIFIC APPLICATION FIELDS, NOT OTHERWISE PROVIDED FOR
- G16Z99/00—Subject matter not provided for in other main groups of this subclass
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- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
The invention discloses a kind of line clogging level calculating methods, measure by pressure-measuring pipe road the total pressure P and static pressure P of a certain position of pipelinest, dynamic pressure P is obtained by calculatingd, dynamic pressure Pd=P-Pst；Pass through the ratio between the static pressure of running system and dynamic pressure Pst/PdThe blocked state of system flow is characterized, with the increment of blocked stateWith its as defined in the ratio between range of initial blocked state parameter L and end of a period blocked state parameter H characterize the chocking-up degree C of system flow, indicate are as follows:The present invention can accurate in variable flow system, steadily indicate the chocking-up degree of pipeline, avoid the problem of can not determining line clogging state because of flow, pressure change with chocking-up degree derived from Hydrodynamics Theory and algorithm.
Description
Technical field
The present invention relates to Monitoring Pinpelines technical equipment field, specifically a kind of line clogging level calculating method.
Background technique
The operating status for obtaining fluid conveying pipe network in real time is of great immediate significance.For the stream over long distances with complexity
Body transfer pipeline can be searched quickly and exclude existing hidden danger and failure；Blocked state or blocking for vehicle filtering device
Degree, especially high-power purpose-built vehicle, both can effectively prevent as owe maintenance and caused by vehicle, equipment operation therefore
Barrier and damage, and can reduce as cross maintenance and caused by manpower, financial resources waste etc..
To obtain the resistance of pipeline flowing or the stopping state of filter, traditional method is mostly the side according to constant flow rate
Formula detects the pressure parameter (usually static pressure) of a certain position medium or the static pressure difference of detection device import and export position, passes through
The pressure parameter or static pressure difference directly or indirectly judge the chocking-up degree of pipeline or filter.And for changes in flow rate range
For the ever-increasing system of larger and chocking-up degree, only by single pressure parameter or static pressure difference parameter be can not obtain it is stifled
Plug degree, the not no technology identical and close with the present invention in the prior art.For the system of a changes in flow rate,
Pressure parameter everywhere is the variation with flow and changes.Pressure-flow curve be a quadratic function curve, i.e., with
Flow increase its static pressure in quadratic power increase.In many cases, since the pressure increase that flow improves and generates is remote
The pressure increase generated greater than the blocking due to pipeline.Therefore, traditional method is not applied for variable flow system blocking
The detection of degree.
In existing application, the chocking-up degree of pipeline is mostly by the way of single pressure value (and pressure difference) alarm come real
Existing.I.e. system only detects duct static pressure inlet and outlet static pressure difference, has ignored the influence factor of changes in flow rate in pipeline, therefore,
There is the situations of plugged filter detection inaccuracy in many occasions.Generally existing this is asked in many vehicles and engineering machinery
Topic.
Summary of the invention
The purpose of the present invention is to provide a kind of line clogging level calculating methods, to solve to propose in above-mentioned background technique
The problem of.
To achieve the above object, the invention provides the following technical scheme:
A kind of line clogging level calculating method, carry out measuring by pressure-measuring pipe road the total pressure P of a certain position of pipeline with it is quiet
Press Pst, dynamic pressure P is obtained by calculatingd, dynamic pressure Pd=P-Pst；Pass through the ratio between the static pressure of running system and dynamic pressure Pst/PdCharacterization system
The blocked state of system flowing, with the increment of blocked stateWith its as defined in initial blocked state parameter L and ending block up
The ratio between range of state parameter H is filled in characterize the chocking-up degree C of system flow, is indicated are as follows:
As a further solution of the present invention: the pressure-measuring pipe road includes that test pipeline and combined type survey pressure inserting tube, combination
Formula surveys pressure inserting tube the vertical and inside by being inserted into test pipeline by way of testing pipe centerline, and combined type is surveyed pressure and visited
Pipe includes total pressure test department and static pressure test portion, and total pressure test position is in static pressure test portion upstream side, on total pressure test department
It is provided with total pressure instrument connection, static pressure test portion is equipped with static pressure test hole；Static pressure test hole according to requirement of engineering test inserting tube on,
1-4 gaging hole is evenly arranged perpendicular to grain direction；Total pressure gaging hole can accumulate annulus according to several cross-sections, take average diameter
Mode arrange, the algorithm of each average diameter are as follows:
D: the internal diameter of pipeline is tested；
I: for the logarithm of total pressure gaging hole；
Di: the average diameter of cross-section product annulus.
As further scheme of the invention: fluid flow direction comes in the total pressure instrument connection face test pipeline
Direction is flowed, static pressure test hole is vertical with the flow direction of fluid.
As further scheme of the invention: the total pressure instrument connection is to test the kernel of section of pipeline as symmetrical centre
It is arranged in pairs.
Compared with prior art, the present invention, can be in unsteady flow with chocking-up degree derived from Hydrodynamics Theory and algorithm
Chocking-up degree that is accurate in amount system, steadily indicating pipeline, pipeline or mistake can not be determined because of flow, pressure change by avoiding
The problem of filter blocked state, can be applied to the operating status of the fluid conveyings pipe network such as vehicle, engineering machinery and petroleum, chemical industry
Monitoring.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of line clogging level calculating method.
Fig. 2 is the top view cross section figure structure schematic representation of line clogging level calculating method.
Fig. 3 is the side structure schematic view of line clogging level calculating method.
Fig. 4 is the distributed architecture schematic diagram of total pressure instrument connection in line clogging level calculating method.
Fig. 5 is the flow resistance characteristic curve graph of different chocking-up degrees.
Fig. 6 is static pressure-flow curve and static pressure-dynamic pressure curve graph.
Fig. 7 is static pressure and dynamic pressure performance and propagation process figure.
In figure: 1- tests pipeline, 2- total pressure test department, 3- static pressure test portion, 4- combined type survey pressure inserting tube, the flowing side 5-
To, 6- total pressure instrument connection, 7- static pressure test hole.
Specific embodiment
The technical solution of the patent is explained in further detail With reference to embodiment.
Fig. 1-7 is please referred to, a kind of line clogging level calculating method carries out measuring a certain position of pipeline by pressure-measuring pipe road
Total pressure (P) and static pressure (Pst), dynamic pressure P is obtained by calculatingd, dynamic pressure Pd=P-Pst；Static pressure and dynamic pressure by running system
The ratio between (Pst/Pd) blocked state of system flow is characterized, with the increment of blocked stateWith its as defined in initially block up
The ratio between range of state parameter (L) and end of a period blocked state parameter (H) is filled in characterize the chocking-up degree (C) of system flow, is indicated
Are as follows:
The pressure-measuring pipe road includes test pipeline 1 and combined type surveys pressure inserting tube 4, combined type survey pressure inserting tube 4 by vertical and
Mode by testing 1 center line of pipeline is inserted into the inside of test pipeline 1, and it includes total pressure test department 2 that combined type, which surveys pressure inserting tube 4,
With static pressure test portion 3, total pressure test department 2 is located at 3 upstream side of static pressure test portion, and total pressure test is provided on total pressure test department 2
Hole 6, static pressure test portion 3 are equipped with static pressure test hole 7；Static pressure test hole is according to requirement of engineering on test inserting tube, perpendicular to stream
Line direction is evenly arranged 1-4 gaging hole；Total pressure gaging hole can by several cross-sections product annulus, take average diameter in the way of cloth
It sets, the algorithm of each average diameter are as follows:
D: the internal diameter of pipeline is tested；
I: for the logarithm of total pressure gaging hole；
Di: the average diameter of cross-section product annulus.
The direction of flow of fluid flow direction 5, static pressure test hole 7 and stream in 2 face of the total pressure instrument connection test pipeline 1
The flow direction 5 of body is vertical.
The total pressure instrument connection 6 is arranged in pairs using the kernel of section for testing pipeline 1 as symmetrical centre.
It is the critical component for measuring total pressure and static pressure data in pipeline that combined type, which surveys pressure inserting tube,.Combined type surveys pressure inserting tube
Arrangement will be vertical and passes through test pipe centerline.Combined type survey pressure inserting tube section (or diameter) should meet test need and
Structure stiffness is as small as possible under conditions of requiring, to reduce the influence flowed to pipeline internal medium.Combined type is surveyed on pressure inserting tube
One group of total pressure instrument connection and static pressure test hole is distributed with according to certain rule, the incoming flow side of fluid in total pressure instrument connection face pipeline
To static pressure test Kong Zeyu fluid flow direction is vertical.Total pressure instrument connection is arranged in pairs using pipeline section center as symmetrical centre,
The quantity in hole should be determined according to the size of the needs of measuring accuracy and test pipe diameter, and 2-5 pairs is generally in engineer application,
The distribution in hole can be arranged according to pipeline section homalographic circular fashion.
The diameter of test pipeline should match with tested pipe-line system, generally be taken as identical caliber.The selection of its length is answered
Combined type can be made, which to survey pressure inserting tube position, has more stable flow field, so that measured data stabilization, accurate.Special circumstances need
When changing test pipe diameter, it should implement according to relevant fluid engineering standard.
The related algorithm of line clogging degree:
Combined type surveys pressure inserting tube can measure the total pressure (P) and static pressure (P of a certain position of pipeline simultaneouslyst).In a certain of pipeline
The distribution of static pressure is relatively uniform on position, and static pressure test hole can be according to requirement of engineering on test inserting tube, perpendicular to streamline side
To being evenly arranged 1-4 gaging hole；Total pressure gaging hole can by several cross-sections product annulus, take average diameter in the way of arrange,
The algorithm of each average diameter:
D: the internal diameter of pipeline is tested；
I: for the logarithm of total pressure gaging hole；
Di: the average diameter of cross-section product annulus.
Flow resistance characteristic reflects the flow of a running system and the variation relation of resistance (static pressure or static pressure difference), one compared with
Unobstructed running system has relatively flat flow resistance characteristic curve, namely as the increase of flow, its resistance slowly increase.Instead
It, then flow resistance characteristic curve is precipitous for a running system compared with blocking, resistance rapid increase with the increase of flow.The present invention
With the ratio between the static pressure of running system and dynamic pressure (Pst/Pd) characterize the blocked state of system flow, with the increment of blocked stateWith its as defined in initial the ratio between blocked state parameter (L) and the range of end of a period blocked state parameter (H) be to characterize
The chocking-up degree (C) of system flowing, indicates are as follows:
Line clogging degree detection device is series in tested pipeline, or is connected in the outlet side of filter, makes tested system
Fluid in system all flows through device；The total pressure and static pressure in pipeline are obtained by combined type total pressure, static pressure test inserting tube；Fortune
The total pressure and static pressure that are obtained with test calculate the chocking-up degree of pipeline.
The present invention solves the problems, such as line clogging state in variable flow system, the real-time detection of chocking-up degree.Traditional side
Fado is for regime flow system, i.e., under determining flow, by the static pressure for detecting a certain position or a certain section of pipeline
Parameter or pressure difference judge flow resistance or blockage.For dynamic, the biggish system of changes in flow rate range, wherein respectively
The static pressure or pressure difference of a position are the variations with flow and fluctuate, therefore be only accurately to slap only in accordance with single pressure value
Gripping tube road or filter plugging condition.The present invention can become with chocking-up degree derived from Hydrodynamics Theory and algorithm
Chocking-up degree that is accurate in flow system, steadily indicating pipeline or filter, avoids because flow, pressure change can not be true
The problem of determining pipeline or filter plugging condition.Present invention can apply to the fluid conveyings such as vehicle, engineering machinery and petroleum, chemical industry
The monitoring running state of pipe network.
The preferred embodiment of the patent is described in detail above, but this patent is not limited to above-mentioned embodiment party
Formula within the knowledge of one of ordinary skill in the art can also be under the premise of not departing from this patent objective
It makes a variety of changes.
Claims (4)
1. a kind of line clogging level calculating method measure by pressure-measuring pipe road the total pressure P and static pressure of a certain position of pipeline
Pst, dynamic pressure P is obtained by calculatingd, dynamic pressure Pd=P-Pst；It is characterized in that, passing through the ratio between the static pressure of running system and dynamic pressure Pst/
PdThe blocked state of system flow is characterized, with the increment of blocked stateWith its as defined in initial blocked state parameter L
The chocking-up degree C of system flow is characterized with the ratio between the range of end of a period blocked state parameter H, is indicated are as follows:
2. line clogging level calculating method according to claim 1, which is characterized in that the pressure-measuring pipe road includes test
Pipeline and combined type, which are surveyed, presses inserting tube, and combined type is surveyed pressure inserting tube and passed through vertically and by being inserted into survey by way of testing pipe centerline
The inside in test tube road, it includes total pressure test department and static pressure test portion that combined type, which surveys pressure inserting tube, and total pressure test position is in static pressure test
Portion's upstream side, is provided with total pressure instrument connection on total pressure test department, and static pressure test portion is equipped with static pressure test hole；Static pressure test hole
According to requirement of engineering test inserting tube on, 1-4 gaging hole is evenly arranged perpendicular to grain direction；Total pressure gaging hole can be according to several
A cross-section product annulus takes the mode of average diameter to arrange, the algorithm of each average diameter are as follows:
D: the internal diameter of pipeline is tested；
I: for the logarithm of total pressure gaging hole；
Di: the average diameter of cross-section product annulus.
3. line clogging level calculating method according to claim 2, which is characterized in that the total pressure instrument connection face is surveyed
The direction of flow of fluid flow direction in test tube road, static pressure test hole are vertical with the flow direction of fluid.
4. line clogging level calculating method according to claim 2, which is characterized in that the total pressure instrument connection is to test
The kernel of section of pipeline is arranged in pairs for symmetrical centre.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710017082.4A CN108302328B (en) | 2017-01-11 | 2017-01-11 | A kind of line clogging level calculating method |
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| CN201710017082.4A CN108302328B (en) | 2017-01-11 | 2017-01-11 | A kind of line clogging level calculating method |
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| CN108302328A CN108302328A (en) | 2018-07-20 |
| CN108302328B true CN108302328B (en) | 2019-08-16 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109723976B (en) * | 2019-02-26 | 2021-10-08 | 中国神华能源股份有限公司 | Pipeline blockage position detection device |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1595071A (en) * | 2004-06-30 | 2005-03-16 | 上海理工大学 | Detachable combined dynamic pressure for flow and pressure measurement |
| CN2847235Y (en) * | 2005-11-18 | 2006-12-13 | 西安佳晖科技有限公司 | Insert combined ouliba flow meter |
| CN2881558Y (en) * | 2006-03-15 | 2007-03-21 | 项家从 | Antiadhesion antiblocking uniform speed pipe flow sensor |
| RU2317482C1 (en) * | 2006-12-04 | 2008-02-20 | Общество С Ограниченной Ответственностью "Газпромэнергодиагностика" | Mode of definition of volumetric consumption of transported gas through closed locking-regulating fittings |
| CN202304903U (en) * | 2011-10-21 | 2012-07-04 | 广州万德威尔自动化系统有限公司 | Exact air quantity measuring system |
| CN202382779U (en) * | 2011-12-28 | 2012-08-15 | 陕西仪新测控仪表有限公司 | Concealed annular cone throttling device for online sweeping, pollution discharge and blockage prevention |
| CN205155582U (en) * | 2015-12-08 | 2016-04-13 | 潘熊炜 | Stifled signal receiver is surveyed to pipeline |
-
2017
- 2017-01-11 CN CN201710017082.4A patent/CN108302328B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1595071A (en) * | 2004-06-30 | 2005-03-16 | 上海理工大学 | Detachable combined dynamic pressure for flow and pressure measurement |
| CN2847235Y (en) * | 2005-11-18 | 2006-12-13 | 西安佳晖科技有限公司 | Insert combined ouliba flow meter |
| CN2881558Y (en) * | 2006-03-15 | 2007-03-21 | 项家从 | Antiadhesion antiblocking uniform speed pipe flow sensor |
| RU2317482C1 (en) * | 2006-12-04 | 2008-02-20 | Общество С Ограниченной Ответственностью "Газпромэнергодиагностика" | Mode of definition of volumetric consumption of transported gas through closed locking-regulating fittings |
| CN202304903U (en) * | 2011-10-21 | 2012-07-04 | 广州万德威尔自动化系统有限公司 | Exact air quantity measuring system |
| CN202382779U (en) * | 2011-12-28 | 2012-08-15 | 陕西仪新测控仪表有限公司 | Concealed annular cone throttling device for online sweeping, pollution discharge and blockage prevention |
| CN205155582U (en) * | 2015-12-08 | 2016-04-13 | 潘熊炜 | Stifled signal receiver is surveyed to pipeline |
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| Publication number | Publication date |
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| CN108302328A (en) | 2018-07-20 |
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