CN108413862A - A kind of test method of directly buried heat distribution pipeline road deformation - Google Patents
A kind of test method of directly buried heat distribution pipeline road deformation Download PDFInfo
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- CN108413862A CN108413862A CN201810314539.2A CN201810314539A CN108413862A CN 108413862 A CN108413862 A CN 108413862A CN 201810314539 A CN201810314539 A CN 201810314539A CN 108413862 A CN108413862 A CN 108413862A
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- strain rosette
- heat distribution
- distribution pipeline
- strain
- rosette
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/16—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring the deformation in a solid, e.g. by resistance strain gauge
- G01B7/18—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring the deformation in a solid, e.g. by resistance strain gauge using change in resistance
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- General Physics & Mathematics (AREA)
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
- Testing Or Calibration Of Command Recording Devices (AREA)
Abstract
The invention belongs to heat distribution pipeline field of engineering technology, and in particular to a kind of test method of directly buried heat distribution pipeline road deformation.Before heat distribution pipeline does not add insulating layer, the position for needing Deformation Monitoring is chosen in outer wall of steel pipe, pass through the processes such as angle grinder polishing, sand paper polishing, alcohol scouring, the pressurization of high temperature resistant super glue patch, strong magnets successively and install strain rosette, covers one layer of moisture-proof silicon rubber later；Strain rosette routed sideways' thermometer；Strain rosette, thermometer and cable are welded；Cable is arranged along tube wall and leads to pipeline one end number；The techniques such as mounting bracket, set protection crust, heat-insulating layer foaming are carried out to steel pipe；It is connected with observation, record and control device after drawing cable after heat distribution pipeline direct-burried and is monitored.This invention ensures that observation system is not destroyed during heat-insulating layer foaming, the long term high temperature working condition of heat distribution pipeline can be born, when observation does not have to banket to excavate, and operating process is simple, and precision is high, monitoring effect is good.
Description
Technical field
The invention belongs to heat distribution pipeline field of engineering technology, and in particular to a kind of test side of directly buried heat distribution pipeline road deformation
Method.
Background technology
With the continuous expansion of urban development pattern and constantly increasing to environmental requirement, more and more cities start
Central heating facility is established, municipal heating systems are built；The heat distribution pipeline diameter of major network is being gradually increased in the process, at present the world
Upper maximum heat distribution pipeline diameter has had reached 1600mm；The laying of heat distribution pipeline also mostly uses greatly direct-burried at present in city
Formula, and inevitably to pass through the location of the states of ground complexity such as strategic road, river, it is difficult to be changed again that laying, which finishes,
It is dynamic, it is therefore desirable to the deformation of pipeline in the process of running is monitored, conduit running situation is grasped, added to improve pipeline
Work technique, subsequent pipeline layout of roads etc. provide important references.
To the observational study of the heat distribution pipeline deformation in direct-burried in prior art report, it will typically banket and excavate, so
Observation point is installed outside pipe insulating layer afterwards, is measured using geometrical standard method, but this measurement method occupies sky
Between it is big, axial macroscopic deformation can only be carried out and measured, and error is big, it is also larger to the influence of environment in operation；Heat distribution pipeline
During applying external polyurethane insulation coating, need to bear certain high-pressure high-temperature environment, the course of work after direct-burried
In also hot soak condition, influenced by various complex working conditions it is big, so the general foil gauge used in the lab is viscous
Patch technology and measurement method are also no longer applicable in.
Invention content
The solved the technical problems existing in the prior art of the present invention are to the heat in hot operation state in direct-burried
The circumferential deformation of hydraulic piping and axial deformation are monitored, and are also exactly to solve observation system to be broken during heat-insulating layer foaming
It is bad, the long term high temperature working condition of heat distribution pipeline can not be born, and need to banket when observation and the problems such as excavate.
The present invention is technical solution used by solving its technical problem：
A kind of measurement method of directly buried heat distribution pipeline road deformation, including step in detail below：
The first step pastes strain rosette in outer wall of steel pipe, specific as follows：
The position for needing to monitor is chosen in outer wall of steel pipe, passes through angle grinder polishing successively, sand paper is polished, industrial alcohol is cleaned, glue
The processes such as water patch, strong magnets pressurization arrange strain rosette；The moisture-proof silicon rubber of strain rosette overlying last layer；
Second step carries out protection processing to strain rosette and signal cable line, then performs thermal insulation material to outer wall of steel pipe, specifically such as
Under：
Signal cable is welded with strain rosette conducting wire, and soldering opening is first wound with insulating tape, then uses aluminium foil covering protection, by cable
It is arranged along tube wall and leads to pipeline one end；In strain rosette position routed sideways' thermometer, thermometer conducting wire is welded with signal cable,
Soldering opening is first wound with insulating tape, then uses aluminium foil covering protection；Strain rosette, thermometer, plumb joint are shielded with aluminium foil
Protection；Cable is arranged along tube wall and leads to pipeline one end and is numbered；Mounting bracket is carried out to steel pipe, set protection crust, is protected
The techniques such as warm layer foaming；
Third walks, and is monitored to the deformation implementation of directly buried heat distribution pipeline road, specific as follows：
Heat distribution pipeline deform when, strain rosette can cause the resistance value of strain rosette to change with deforming, so make by
The electric signal of strain rosette changes, and is acquired analysis to the variable quantity of electric signal by data collecting instrument, you can obtain pipe
The axial strain and hoop strain in road, then strain value is modified according to the temperature of monitoring, and then can be obtained by integral
The perimeter of section and axial length variable quantity of entire heat distribution pipeline.
Further, in the first step, it pastes strain rosette and must comply with following operation sequence：
Step 1, the patch location needed after angle grinder polishes it is smooth, sand paper used be 320 mesh sand paper, along intersection
45 ° of both directions carry out polishing until there is macroscopic cross cut to polishing position；
Step 2 needs one piece of sheet rubber of lining, one block of polytetrafluoroethylene (PTFE) is served as a contrast between sheet rubber and strain rosette between magnet and strain rosette
Film, and pressurization need at least continue 24 hours；Strain rosette surface need to smear one layer of silicon rubber after pressurization, and the spontaneous curing time is many
In 24 hours；
Step 3, signal cable line are all made of soldering and welding with strain rosette conducting wire and thermometer conducting wire, and plumb joint first uses insulating cement
Band package, insulating tape outer layer are wrapped up with aluminum foil and adhesive tape again；
Step 4, before steel pipe insulating foam layer, strain rosette, thermometer, plumb joint should all be covered using bulk aluminum foil and adhesive tape
Protection.
Preferably, the strain rosette is 90 ° of strain rosettes, and every group of strain rosette includes 2 foil gauges, used foil gauge
For high temperature resistant foil gauge, can be worked normally under 150 DEG C of hot environments.
Preferably, the glue is that H-613 mixes high temperature resistant cement.
Preferably, the moisture-proof silicon rubber is room curing silicon rubber, i.e. 704 silicon rubber.
Preferably, the signal cable is fire resistant shielding cable, and one layer of metal net shaped braiding layer is wrapped up outside core,
It is silicon rubber insulation sheath outside braiding layer.
Possessed advantageous effect is the present invention compared with prior art：The present invention can be in running order after direct-burried
Heat distribution pipeline deformation monitored in real time, install stream by using special fire resistant apparatus and according to special strain rosette
Journey effectively solves observation system and is not destroyed during heat-insulating layer foaming, can bear the long term high temperature work of heat distribution pipeline
State, not having to when observation to banket the problems such as excavates, and the rationally position of adjustment strain rosette and quantity can be needed according to observation, together
When monitoring process in test frequency, data record and storage etc. can be controlled by computer, reduce staff
Workload, realize the real-time monitoring of heat distribution pipeline deformation condition；Device and method are simple needed for entire technical solution, use
Convenient, labor intensity is small, high certainty of measurement.
Description of the drawings
Fig. 1 is the point layout structural schematic diagram of monitoring method of the present invention.
Schematic diagram when magnet pressurizes in Fig. 2 monitoring methods of the present invention.
The schematic diagram being painted in Fig. 3 monitoring methods of the present invention after moisture-proof silicon rubber.
Wherein, 1- strain rosettes, 2- polytetrafluoroethylene films, 3- rubber blocks, 4- magnet, 5- silicon rubber, 6- aluminium foils, 7- welding
Head, 8- signal cables, 9- thermal resistance temperature-sensing probes, 10- plumb joints, 11- aluminium foils, 12- signal cables, 13- data collecting instruments,
14- computers.
Specific implementation mode
The present invention is described in further detail with reference to embodiment, embodiments of the present invention are not limited thereto.
As shown in Fig. 1 ~ 3, a kind of test method of directly buried heat distribution pipeline road deformation, the device that this method needs includes：It calculates
Machine, deformeter, strain rosette, cable, thermometer, sheet rubber, polytetrafluoroethylene film, glue, aluminium foil, magnet；Wherein, described to answer
Become flower as 90 ° of strain rosettes, every group of strain rosette includes 2 foil gauges, and used foil gauge is high temperature resistant foil gauge, Neng Gou
It is worked normally under 150 DEG C of hot environments；The cable is fire resistant shielding cable, and one layer of metal net shaped volume is wrapped up outside core
Tissue layer, braiding layer outside are silicon rubber insulation sheath；The temperature is calculated as thermal resistance temperature-sensing probe, can be in 150 DEG C of high temperature
It is worked normally under environment；The moisture-proof silicon rubber is room curing silicon rubber（704 silicon rubber）.
A kind of test method of directly buried heat distribution pipeline road deformation, specifically carries out as follows：
The first step pastes strain rosette in outer wall of steel pipe, the position for needing to monitor is chosen in outer wall of steel pipe, passes through angle grinder successively and throw
The processes such as light, sand paper polishing, industrial alcohol scouring, the pressurization of glue patch, strong magnets arrange strain rosette, specific as follows：
First, before heat pipeline heat insulation layer foaming, the riding position and quantity of strain rosette are determined；
Then, at measuring point, pipeline outer wall is polished using angle grinder, keeps pipeline outer wall smooth, then with sand paper edge
45 ° crisscross to carry out polishing until there is macroscopic cross cut to polishing position, then picks alcohol pair with cotton
Patch location is cleaned；
Furthermore it is gently described with pencil along circumferential and axial cross wire is parallel in patch location, spreading glue will strain
It spends 1 to be placed along cross spider, makes foil gauge one circumferentially, another is axially；Then across polytetrafluoroethylene film 2 to strain
It spends 1 to be pressurizeed about 3 seconds with finger, then pads lastblock rubber slab 3, carry out pressurized treatments using magnet 4, pressing time is not
Less than 24 hours；
Finally, magnet 4, sheet rubber 3, polytetrafluoroethylene film 2 are removed, in the moisture-proof silicon of 1 laid on one layer of 1-2mm thickness of strain rosette
It is stood after rubber 5, time of repose is no less than 24 hours；The moisture-proof silicon rubber uses room curing silicon rubber, i.e. 704 silicon rubbers
Glue；
Second step carries out protection processing to strain rosette and signal cable line, then performs thermal insulation material to outer wall of steel pipe, specifically such as
Under：
First, signal cable 8 and strain rosette conducting wire are welded, soldering opening 7 is first wound with insulating tape, then is protected using aluminium foil winding
Shield uses bulk aluminium foil 6 that silicon rubber 5, plumb joint 7 are pasted covering, cable 8 is arranged along tube wall and leads to pipeline one end again later
And it numbers；
Then, in 1 position routed sideways' thermometer 9 of strain rosette, thermometer conducting wire is welded with signal cable, and soldering opening 11 is first used exhausted
Edge adhesive tape is wound, then using aluminium foil winding protection, is later again glued thermal resistance temperature-sensing probe 9, plumb joint 10 with bulk aluminium foil 11
Lid is pasted, conducting wire 12 is arranged along tube wall and leads to pipeline one end, and conducting wire is numbered；Install other according to the method described above
The strain rosette of measuring point and thermometer, until all measuring points are installed and finished；
Finally, the technological process made according to heat pipeline heat insulation layer carries out mounting bracket, set protection crust, foaming etc. to steel pipe
Work；
Third walks, and is monitored to the deformation implementation of directly buried heat distribution pipeline road, specific as follows：
Conducting wire is connect with data collecting instrument 13 and computer 14, you can the deformation of heat distribution pipeline is monitored, heat distribution pipeline
When deformation, strain rosette can cause the resistance value of strain rosette to change with deforming, and then make the telecommunications by strain rosette
It number changes, analysis is acquired to the variable quantity of electric signal by data collecting instrument, you can obtain the axial strain of pipeline
And hoop strain, then strain value is modified according to the temperature of monitoring, and then entire heat distribution pipeline can be obtained by integral
Perimeter of section and axial length variable quantity.
The above is only presently preferred embodiments of the present invention, not does limitation in any form to the present invention, any ripe
Professional and technical personnel is known, without departing from the scope of the present invention, when the technology contents work using the disclosure above
Go out change or modify the equivalent embodiment of equivalent variations, as long as being the content without departing from technical solution of the present invention, still falls within this
In the range of inventive technique scheme.
Claims (6)
1. a kind of measurement method of directly buried heat distribution pipeline road deformation, which is characterized in that including step in detail below：
The first step pastes strain rosette in outer wall of steel pipe, specific as follows：
The position for needing to monitor is chosen in outer wall of steel pipe, passes through angle grinder polishing successively, sand paper is polished, industrial alcohol is cleaned, glue
The processes such as water patch, strong magnets pressurization arrange strain rosette；The moisture-proof silicon rubber of strain rosette overlying last layer；
Second step carries out protection processing to strain rosette and signal cable line, then performs thermal insulation material to outer wall of steel pipe, specifically such as
Under：
Signal cable is welded with strain rosette conducting wire, and soldering opening is first wound with insulating tape, then uses aluminium foil covering protection, by cable
It is arranged along tube wall and leads to pipeline one end；In strain rosette position routed sideways' thermometer, thermometer conducting wire is welded with signal cable,
Soldering opening is first wound with insulating tape, then uses aluminium foil covering protection；Strain rosette, thermometer, plumb joint are shielded with aluminium foil
Protection；Cable is arranged along tube wall and leads to pipeline one end and is numbered；Mounting bracket is carried out to steel pipe, set protection crust, is protected
The techniques such as warm layer foaming；
Third walks, and is monitored to the deformation implementation of directly buried heat distribution pipeline road, specific as follows：
Heat distribution pipeline deform when, strain rosette can cause the resistance value of strain rosette to change with deforming, so make by
The electric signal of strain rosette changes, and is acquired analysis to the variable quantity of electric signal by data collecting instrument, you can obtain pipe
The axial strain and hoop strain in road, then strain value is modified according to the temperature of monitoring, and then can be obtained by integral
The perimeter of section and axial length variable quantity of entire heat distribution pipeline.
2. a kind of measurement method of directly buried heat distribution pipeline road deformation according to claim 1, which is characterized in that in the first step
In, it pastes strain rosette and must comply with following operation sequence：
Step 1, the patch location needed after angle grinder polishes it is smooth, sand paper used be 320 mesh sand paper, along intersection
45 ° of both directions carry out polishing until there is macroscopic cross cut to polishing position；
Step 2 needs one piece of sheet rubber of lining, one block of polytetrafluoroethylene (PTFE) is served as a contrast between sheet rubber and strain rosette between magnet and strain rosette
Film, and pressurization need at least continue 24 hours；Strain rosette surface need to smear one layer of silicon rubber after pressurization, and the spontaneous curing time is many
In 24 hours；
Step 3, signal cable line are all made of soldering and welding with strain rosette conducting wire and thermometer conducting wire, and plumb joint first uses insulating cement
Band package, insulating tape outer layer are wrapped up with aluminum foil and adhesive tape again；
Step 4, before steel pipe insulating foam layer, strain rosette, thermometer, plumb joint should all be covered using bulk aluminum foil and adhesive tape
Protection.
3. a kind of measurement method of directly buried heat distribution pipeline road deformation according to claim 1 or 2, which is characterized in that described
Strain rosette is 90 ° of strain rosettes, and every group of strain rosette includes 2 foil gauges, and used foil gauge is high temperature resistant foil gauge, Neng Gou
It is worked normally under 150 DEG C of hot environments.
4. a kind of measurement method of directly buried heat distribution pipeline road deformation according to claim 1 or 2, which is characterized in that described
Glue is that H-613 mixes high temperature resistant cement.
5. a kind of measurement method of directly buried heat distribution pipeline road deformation according to claim 1 or 2, which is characterized in that described
Moisture-proof silicon rubber is room curing silicon rubber, i.e. 704 silicon rubber.
6. a kind of measurement method of directly buried heat distribution pipeline road deformation according to claim 1 or 2, which is characterized in that described
Signal cable is fire resistant shielding cable, and one layer of metal net shaped braiding layer is wrapped up outside core, is that silicon rubber is exhausted outside braiding layer
Edge sheath.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810314539.2A CN108413862A (en) | 2018-04-10 | 2018-04-10 | A kind of test method of directly buried heat distribution pipeline road deformation |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810314539.2A CN108413862A (en) | 2018-04-10 | 2018-04-10 | A kind of test method of directly buried heat distribution pipeline road deformation |
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| CN201810314539.2A Pending CN108413862A (en) | 2018-04-10 | 2018-04-10 | A kind of test method of directly buried heat distribution pipeline road deformation |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110196121A (en) * | 2019-04-12 | 2019-09-03 | 中国大唐集团科学技术研究院有限公司火力发电技术研究院 | A kind of regulating units welding point stress test method |
| CN114486495A (en) * | 2022-01-26 | 2022-05-13 | 中铁七局集团有限公司 | Pipeline internal pressure and deformation experimental device and detection method |
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| WO2003058160A1 (en) * | 2002-01-13 | 2003-07-17 | Zbigniew Drazek | Method for measuring the pipeline creeping |
| CN102720220A (en) * | 2012-06-26 | 2012-10-10 | 兰州交通大学 | Device and method for measuring counterforce of pile end of concrete pipe pile |
| CN203148607U (en) * | 2013-03-21 | 2013-08-21 | 武汉大学 | Post porcelain insulator torsional stress strain test system |
| CN104990654A (en) * | 2015-07-06 | 2015-10-21 | 长安大学 | Remote online large-diameter heat supply pipeline strain monitoring device and remote online large-diameter heat supply pipeline strain detection method |
| CN106153463A (en) * | 2016-09-19 | 2016-11-23 | 安徽理工大学 | A kind of monitoring method of standard rock sample internal strain |
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2018
- 2018-04-10 CN CN201810314539.2A patent/CN108413862A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003058160A1 (en) * | 2002-01-13 | 2003-07-17 | Zbigniew Drazek | Method for measuring the pipeline creeping |
| CN102720220A (en) * | 2012-06-26 | 2012-10-10 | 兰州交通大学 | Device and method for measuring counterforce of pile end of concrete pipe pile |
| CN203148607U (en) * | 2013-03-21 | 2013-08-21 | 武汉大学 | Post porcelain insulator torsional stress strain test system |
| CN104990654A (en) * | 2015-07-06 | 2015-10-21 | 长安大学 | Remote online large-diameter heat supply pipeline strain monitoring device and remote online large-diameter heat supply pipeline strain detection method |
| CN106153463A (en) * | 2016-09-19 | 2016-11-23 | 安徽理工大学 | A kind of monitoring method of standard rock sample internal strain |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110196121A (en) * | 2019-04-12 | 2019-09-03 | 中国大唐集团科学技术研究院有限公司火力发电技术研究院 | A kind of regulating units welding point stress test method |
| CN114486495A (en) * | 2022-01-26 | 2022-05-13 | 中铁七局集团有限公司 | Pipeline internal pressure and deformation experimental device and detection method |
| CN114486495B (en) * | 2022-01-26 | 2024-04-12 | 中铁七局集团有限公司 | Method for detecting internal pressure and deformation of pipeline |
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Application publication date: 20180817 |