CN110159934A - Strain transducer and pipe safety method of discrimination - Google Patents
Strain transducer and pipe safety method of discrimination Download PDFInfo
- Publication number
- CN110159934A CN110159934A CN201910502261.6A CN201910502261A CN110159934A CN 110159934 A CN110159934 A CN 110159934A CN 201910502261 A CN201910502261 A CN 201910502261A CN 110159934 A CN110159934 A CN 110159934A
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- China
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- pipeline
- strain transducer
- wall
- welding
- protective cover
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Classifications
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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
- F17D5/02—Preventing, monitoring, or locating loss
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
- G01L1/10—Measuring force or stress, in general by measuring variations of frequency of stressed vibrating elements, e.g. of stressed strings
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
- Pipeline Systems (AREA)
Abstract
The present invention relates to long-distance oil & gas pipeline field, a kind of strain transducer and pipe safety method of discrimination are provided.The sensor includes two fixinig plates (1), two welding substrate (2), two end blocks (3), vibratory string (4), outer protection tube (5), the excitation coil (8) being removably mounted on outer protection tube (5), protective cover (9) and the soil pressure cell (13) being arranged on the outer wall of protective cover (9).It is bonded pipeline (12) outer wall to fixinig plate (1) convertible curvature；Welding substrate (2) is fixed on fixinig plate (1)；End block (3) is fixed in welding substrate (2)；Outer protection tube (5) is sleeved on vibratory string (4), and the both ends of outer protection tube (5) and the both ends of vibratory string (4) are fixed, and is fixed in two end blocks (3)；The first side of protective cover (9) is connect with two welding substrates (2) by connector (91).The sensor can be with the safe condition of accurate judgement pipeline.
Description
Technical field
The present invention relates to long-distance oil & gas pipeline fields, in particular to a kind of strain transducer and pipe safety differentiation side
Method.
Background technique
Growing with long distance pipeline mileage, what the high risk areas such as mountain area, the area geological disaster Yi Fa gradually became pipeline must
Through road.Under the influence ofs geological disaster or cal rolling etc., when the meter Sai Si stress of buried long distance pipeline is more than surrender
After the limit, pipeline will occur surrender failure and even be broken.Therefore, need to install strain transducer before designing pipeline with detection pipe
The stress in road.
Currently used strain transducer is cylindrical type vibratory string strain transducer, and the cylindrical type vibratory string strain transducer is by two
A round end block, protection pipe and with measuring device constitute, an end block, the middle position of protection pipe are installed in protection pipe both ends respectively
Measuring device is installed, measuring device is bonded with the outer wall of pipeline, so that the stress of pipeline is measured, it will be outside round end block and pipeline
The position adhesion of wall contact, so that entire strain transducer is installed on the outer wall of pipeline.
During realization of the invention, the inventor finds that the existing technology has at least the following problems:
The measuring device of cylindrical type vibratory string strain transducer in presently relevant technology can only measure a certain position of pipeline
Stress cannot accurately measure the axial direction of pipeline and the stress in circumferential direction, so that the pipe stress of measurement is inaccurate
Really, the safety detection of pipeline is influenced.The cylindrical type vibratory string strain transducer may be only available for the big pipeline of radius of curvature, work as pipeline
Radius of curvature it is smaller when, the strain transducer contacted with pipeline outer wall place it is smaller, connection become built on the sand, to influence
The detection of pipe stress.
Summary of the invention
In view of this, the embodiment of the present application provides a kind of strain transducer and pipe safety method of discrimination, it can be accurate
Judge the safe condition of pipeline.Specific technical solution is as follows:
A kind of strain transducer, which is characterized in that including two fixinig plates, two welding substrates, two end blocks, vibratory string,
Outer protection tube, excitation coil and protective cover, wherein
Described two fixinig plates are fitted on the outer wall of pipeline suitable for convertible curvature；
Described two welding substrates are separately fixed on described two fixinig plates, and it is each it is described welding substrate with it is described
First side of fixinig plate contact is arc；
Described two end blocks are separately fixed on described two welding substrates；
The outer protection tube is sleeved on the vibratory string, and both ends of the both ends of the outer protection tube respectively with the vibratory string are fixed,
And the both ends of the fixed outer protection tube and the vibratory string are fixed in described two end blocks；
The excitation coil is removably mounted in the outer protection tube；
The protective cover covers in the outer protection tube, and the first side of the protective cover passes through with described two welding substrates
Connector connection, and the protective cover is suitable for rotating by center axis of the connector；
The soil pressure cell is arranged on the outer wall of the protective cover, and the soil pressure cell is configured as monitoring the pipe
The native load that road is subject to.
Selectively, the cross section of the protective cover is arc-shaped, and the longitudinal length of the protective cover is greater than described two
Weld the distance between substrate.
Selectively, the second side opposite with the first side of the protective cover is fixed by welding in described two
On a welding substrate.
Selectively, fire-proof asbestos layer is arranged in the inner wall of the protective cover, is suitable for protecting the vibratory string and the excitation line
Circle.
Selectively, the strain transducer further includes spring and fastening nut, and the spring pocket is mounted in the outer protection tube
On, screw thread, the fastening nut and institute are provided on the outer wall of the outer protection tube between the end block and the excitation coil
State outer protection tube threaded connection, one end of the spring is resisted against on the end block, the other end and the fastening nut against.
Selectively, it is provided with welding locating slot on the fixinig plate, by the welding locating slot by the fixinig plate
It is welded on the outer wall of the pipeline.
Selectively, the strain transducer further includes the first communication cable, and the excitation coil passes through the communication electricity
Cable is connect with readout instrument；
Selectively, the strain transducer further includes reinforcing rib and the second communication cable, and the reinforcing rib is configured as
The soil pressure cell and the protective cover, and the outer wall vertical of the soil pressure cell and the protective cover are connected, described second is logical
News cable is connect with the soil pressure cell.
A kind of pipe safety method of discrimination, which comprises
The strain transducer is installed on pipeline to be detected；
The stress that the pipeline that the excitation coil monitors is subject to is read, to obtain the stress variation of the pipeline
Trend；
The native load that the pipeline that the soil pressure cell monitors is subject to is read, to obtain the soil that the pipeline is subject to
Load change trend；
According to the stress variation trend and the native load change trend, the safe condition of the pipeline is judged.
Selectively, the welding substrate of correspondingly-sized is selected according to the radius of curvature of the pipeline, is answered described in preparation
Become sensor；
The pipeline is excavated, the default installation site of the strain transducer on the outer wall of the pipeline is polishing to smooth
Without thin hole；
The strain transducer is placed on the default installation site, utilizes mash welder consolidating the strain transducer
Stator is welded on the outer wall of the pipeline；
The excitation coil of the strain transducer is installed in the outer protection tube of the strain transducer；
The position for adjusting the fastening nut of the strain transducer determines the amount of the strain transducer using readout instrument
Journey；
After ensuring that strain transducer monitoring is stablized, the protective cover of the strain transducer is closed and by the protective cover
Second side be welded on the welding substrate of the strain transducer；
Erosion resistant coating is prepared in the outer wall of the protective cover and the pipeline.
It is selectively, described to prepare the strain transducer, comprising:
The welding substrate of different size radius is prepared, size radius is selected to be greater than the institute of the radius of curvature of the pipeline
State welding substrate；
Two fixinig plates are fixed with two welding substrate welds respectively, and by the two of each fixinig plate
Reserved equal length is held, and the setting welding locating slot on the reserved fixinig plate；
The outer protection tube is sleeved on the vibratory string, and the both ends of the outer protection tube and the both ends of the vibratory string are welded
It is fixed；
The spring and the fastening nut are sleeved in the outer protection tube；
The both ends fixed with the vibratory string of the outer protection tube are separately fixed in two end blocks；
The first side of the protective cover is connected by connector in the same side of two end blocks；
The first end of the reinforcing rib is welded on the outer wall of the protective cover, and in the second end of the reinforcing rib
Connect the soil pressure cell.
Selectively, the default installation site, comprising:
The strain transducer is along the installation site of the axial direction of the pipeline outer wall and the strain sensing described in
The installation site in the circumferential direction of pipeline outer wall.
Selectively, the outer wall that the fixinig plate of the strain transducer is welded to the pipeline using mash welder
On, comprising:
The side of any of two fixinig plates fixinig plate is welded and fixed according to the method for cross weld
It is weldingly fixed on the outer wall of the pipeline on the outer wall of the pipeline, then by the other side；
Another described fixinig plate is welded and fixed on the outer wall of the pipeline according to the method for the cross weld.
Selectively, the outer wall in the strain transducer and the pipeline prepares erosion resistant coating, comprising:
The protective cover is covered using viscoelastic body；
The outer wall that the entire pipeline is coated using hot tape wrap heats the hot tape wrap using heat gun until the heat twines
Band fuses into one with the viscoelastic body.
Selectively, the stress variation trend for obtaining the pipeline includes:
The stress variation trend of the pipeline is obtained according to following first formula:
Wherein,Indicate the stress that the excitation coil is subject in the pipeline that t moment monitors；
Indicate the stress that the excitation coil is subject in the pipeline that the t+1 moment monitors.
Selectively, described to obtain the native load change trend that the pipeline is subject to and include:
The native load change trend that the pipeline is subject to is obtained according to following second formula:
Wherein,Indicate the native load that the soil pressure cell is subject in the pipeline that t moment monitors；
Indicate the native loading force that the soil pressure cell is subject in the pipeline that the t+1 moment monitors.
Selectively, described according to the stress variation trend and the native load change trend, judge the pipeline
Safe condition includes:
When the native load value that stress value and the pipeline that the pipeline is subject to are subject to is below 60%, at the pipeline
In safe condition；
When at least one of the native load value that stress value and the pipeline that the pipeline is subject to are subject to is higher than 60%, institute
It is in the hole to state pipeline；
It is right when at least one of the native load value that stress value and the pipeline that the pipeline is subject to are subject to is higher than 90%
The pipeline is handled immediately.
Technical solution bring beneficial effect provided by the embodiments of the present application includes at least:
First side of the welding substrate of strain transducer provided by the embodiments of the present application is arc, the radian with pipeline outer wall
Unanimously, so that welding substrate matches with the outer wall of pipeline, and fixinig plate can change curvature with pipeline
Outer wall fitting, so that the strain transducer can be bonded with the outer wall of pipeline, while the strain transducer can circumferential direction side
To on the outer wall for being mounted on pipeline.The both ends of vibratory string, outer protection tube and excitation coil that set installs are fixed on by two end blocks
On two welding substrates, to form entire strain transducer, outer protection tube can play a protective role to vibratory string, and excitation coil can
To acquire the vibration frequency of vibratory string, to monitor the stress of pipeline.Since fixinig plate and welding substrate can be with the pipes of deep camber
The stress value of pipeline outer wall fitting, strain transducer monitoring is more acurrate, and by entire strain transducer along pipeline axial direction
The axial stress of pipeline can be monitored when installation, and the circumference stress of pipeline can be monitored when circumferentially direction is installed.It is welded at two
It connects the ipsilateral of substrate and protective cover is installed by connector, strain transducer is installed on pipeline outer wall and then by protective cover
It covering in outer protection tube, can protect excitation coil, the first side of protective cover and two welding substrates connected connector installation, from
And the protective cover can be rotated using the connector as center axis, facilitate the dismounting of excitation coil.It is arranged on the outer wall of protective cover
Soil pressure cell can monitor the native load that pipeline is subject to by the soil pressure cell, thus the stress that is subject in conjunction with the pipeline and by
The native load arrived can be with accurate judgement pipe safety state.
Detailed description of the invention
In order to more clearly explain the technical solutions in the embodiments of the present application, make required in being described below to embodiment
Attached drawing, which is done, simply to be introduced, it should be apparent that, the drawings in the following description are only some examples of the present application, for
For those of ordinary skill in the art, without creative efforts, it can also be obtained according to these attached drawings other
Attached drawing.
Fig. 1 is the overlooking structure diagram of strain transducer provided by the embodiments of the present application；
Fig. 2 is the left view structural representation of strain transducer provided by the embodiments of the present application；
Fig. 3 is a kind of welding sequence of cross weld provided by the embodiments of the present application；
Fig. 4 is scheme of installation of the strain transducer provided by the embodiments of the present application on pipeline outer wall；
Fig. 5 is the flow chart of pipe safety method of discrimination provided by the embodiments of the present application；
Fig. 6 is the flow chart provided by the embodiments of the present application that strain transducer is installed on pipeline；
Fig. 7 is the flow chart of prefabricated strain transducer provided by the embodiments of the present application；
Fig. 8 is the flow chart provided by the embodiments of the present application being welded to fixinig plate on pipeline；
Fig. 9 is the flow chart provided by the embodiments of the present application for preparing erosion resistant coating；
Figure 10 is pipe safety discrimination matrix figure provided by the embodiments of the present application.
Appended drawing reference in figure indicates:
1 --- fixinig plate；
2 --- welding substrate；
3 --- end block；
4 --- vibratory string；
5 --- outer protection tube；
6 --- spring；
7 --- fastening nut；
8 --- excitation coil；
9 --- protective cover；91 --- connector；92 --- fire-proof asbestos layer；
10 --- the first communication cable；
11 --- welding locating slot；
12 --- pipeline
13 --- soil pressure cell；
14 --- reinforcing rib；
15 --- the second communication cable.
Specific embodiment
The Integral Thought of technical solution provided by the embodiments of the present application is first introduced below.
Strain transducer provided by the embodiments of the present application, including two fixinig plates, two welding substrates, two end blocks, vibration
String, outer protection tube, excitation coil and protective cover.Two fixinig plates are fitted on the outer wall of pipeline suitable for convertible curvature；Two
Welding substrate is separately fixed on two fixinig plates, and the first side of each welding substrate contacted with fixinig plate is arc；Two
A end block is separately fixed on two welding substrates；Outer protection tube is sleeved on vibratory string, the both ends of outer protection tube respectively with vibratory string two
End is fixed, and the both ends of fixed outer protection tube and vibratory string are fixed in two end blocks；Excitation coil is removably mounted on outer
On pillar；Protective cover covers in outer protection tube, and the first side of protective cover is connect with two welding substrates by connector, and protects
Cover is suitable for rotating by center axis of connector；The soil pressure cell is arranged on the outer wall of the protective cover, and the soil pressure
Box is configured as monitoring the native load that the pipeline is subject to.
The strain transducer welding substrate the first side be arc, it is consistent with the radian of pipeline outer wall, so as to so that
Substrate must be welded to match with the outer wall of pipeline, and fixinig plate can change being bonded with the outer wall of pipeline for curvature, thus should
Strain transducer can be bonded with the outer wall of pipeline, at the same the strain transducer can circumferential direction be mounted on the outer of pipeline
On wall.The both ends of vibratory string, outer protection tube and excitation coil that set installs are fixed on two welding substrates by two end blocks, from
And entire strain transducer is formed, outer protection tube can play a protective role to vibratory string, and excitation coil can acquire the vibration of vibratory string
Frequency, to monitor the stress of pipeline.Since fixinig plate and welding substrate can be bonded with the pipeline outer wall of deep camber, the strain
Sensor monitoring stress value it is more acurrate, and by entire strain transducer along pipeline axial direction install when can monitor pipeline
Axial stress, the circumference stress of pipeline can be monitored when circumferentially direction is installed.Pass through company in two welding the ipsilateral of substrate
Fitting installs protective cover, and strain transducer is installed on pipeline outer wall and then is covered on protective cover in outer protection tube, Ke Yibao
Excitation coil is protected, the first side of protective cover and two welding substrates connected connector installation, so that the protective cover can be with this
Connector is the rotation of center axis, facilitates the dismounting of excitation coil.Soil pressure cell is set on the outer wall of protective cover, passes through the soil pressure
Power box can monitor the native load that pipeline is subject to, so that pipeline peace can be improved in conjunction with the stress of the pipeline and the native load that is subject to
The accuracy differentiated entirely.
It will explain the exemplary embodiments in detail below, exemplary embodiment is illustrated in the accompanying drawings.Following
When description is related to appended drawing reference, unless otherwise indicated, the same reference numerals in different embodiments indicate the same or similar member
Element.
Embodiment described in following exemplary embodiment does not represent all embodiment party consistented with the present invention
Formula.On the contrary, they are only the examples of consistent with some aspects of the invention as detailed in the appended claims structure
Son.
The embodiment of the present application provides a kind of strain transducer, and Fig. 1 is strain transducer provided by the embodiments of the present application
Overlooking structure diagram；Fig. 2 is the left view structural representation of strain transducer provided by the embodiments of the present application；Fig. 3 is the application
A kind of welding sequence for cross weld that embodiment provides.
Referring to Fig. 1, which includes two fixinig plates, 1, two welding substrate, 2, two end blocks 3, vibratory string 4, outside
Pillar 5, excitation coil 8, protective cover 9 and soil pressure cell 13.
For example, with reference to Fig. 1, in a kind of implementation of the embodiment of the present application, two fixinig plates 1 are suitable for convertible curvature
Ground is fitted on the outer wall of pipeline 12.The fixinig plate 1 can have certain flexibility and elasticity, hence for the pipeline 4 of deep camber,
It can also be bonded with the outer wall of pipeline 4, thus the stress that deformation occurs is subject to of accurate measurements pipeline 4.
Two welding substrates 2 are separately fixed on two fixinig plates 1, and each welding substrate 2 is contacted with fixinig plate 1
First side is arc.
For example, with reference to Fig. 2, in a kind of implementation of the embodiment of the present application, the first side and one of each welding substrate 2
A fixinig plate 1 is welded and fixed, and the first side for welding substrate 2 can be arc, and radian is consistent with the radian of the outer wall of pipeline 12,
So that welding substrate 2 matches with the outer wall of pipeline 12, so that between entire strain transducer and the outer wall of pipeline 12 more
Add firm, the stress of the pipeline 12 monitored is also more accurate.
Two end blocks 3 are separately fixed on two welding substrates 2.In a kind of implementation of the embodiment of the present application, two
Second side opposite with the first side of a welding substrate 2 can be rectangular, so that convenient fix with two end blocks 3.In order to enable weldering
Connect the stability between substrate 2 and end block 3, end block 3 can also be with the first side of the second side contacts of welding substrate 2 it is rectangular,
And length is smaller than the length of second side of welding substrate 2.That is, welding substrate 2 can be formed with end block 3 it is step-like.
Certainly, for welding substrate 2 and end block 3, be not limited in above-mentioned shape in the application, in order to enable end block 3 with
The stability between substrate 2 and between welding substrate 2 and the outer wall of pipeline 12 is welded, it can also be by welding substrate 2 and end block 3
It is designed as other reasonable shapes.
Outer protection tube 5 is sleeved on vibratory string 4, both ends of the both ends of outer protection tube 5 respectively with vibratory string 4 are fixed, and will be fixed
The both ends of outer protection tube 5 and vibratory string 4 are separately fixed in two end blocks 3.
For example, may be provided with a circular groove on each end block 3 in a kind of implementation of the embodiment of the present application,
The diameter of the circular groove may be slightly larger than the diameter of outer protection tube 5, so as to the two of the vibratory string 4 and outer protection tube 5 that will be fixed as one
End is individually positioned in the groove of each end block 3, and then outer protection tube 5 and end block 3 are welded and fixed.
Certainly, the application is not limited to that, in other implementations of the embodiment of the present application, can also use other
Reasonable method is fixed by vibratory string 4, outer protection tube 5 and end block 3, thus the convenient mobile drive vibratory string 4 and outer protection tube for passing through end block 3
5 deformation occurs, to reflect stress that pipeline 12 is subject to.
Referring to Fig. 1, the length of vibratory string 4 may be slightly larger than the length of outer protection tube 5, and outer protection tube 5 is sleeved on vibratory string 4, and will
The both ends of outer protection tube 5 and the both ends of vibratory string 4 are fixed, therefore the port at the both ends of outer protection tube 5 can expose one section of vibratory string 4, are being incited somebody to action
When the both ends of outer protection tube 5 are fixed in two end blocks 3, vibratory string 4 may make to contact with end block 3, in this way when deformation occurs for pipeline 12
When, the vibration frequency of vibratory string 4 can more accurately reflect the stress that pipeline 12 is subject in deformation.
Moreover, vibratory string 4 can be played a certain protective role by being set with outer protection tube 5 on vibratory string 4, in the strain transducer
During the stress for monitoring pipeline 12, it is possible to reduce the damage that vibratory string 4 is subject to.
Wherein, vibratory string 4 can be metallic cord, and outer protection tube 5 can also be made of metal, so as to so that vibratory string 4 and outer protection tube 5
Vibration frequency is consistent, and avoids influencing the accuracy of the stress of collected pipeline 12 since material is different.
Excitation coil 8 is removably mounted in outer protection tube 5.Excitation coil 8 is suitable for acquiring the vibration frequency of vibratory string 4, by
In outer protection tube 5 as the material of vibratory string 4, and outer protection tube 5 and vibratory string 4 are fixed together, and therefore, excitation coil 8 is mounted on outer
The vibration frequency of vibratory string 4 can be monitored on pillar 5.Excitation coil 8 can be an individual part, by vibratory string 4, outer protection tube 5 with
And after end block 3 installs, excitation coil 8 can be installed in outer protection tube 5 again, can be passed in this way to avoid in the entire strain of installation
Excitation coil 8 is damaged when sensor.And the length of excitation coil 8 is smaller than the distance between two end blocks 3 so that it is convenient to motivate
The installation of coil 8.
For example, with reference to Fig. 1, which may also include communication cable 10, excitation coil 8 by the communication cable 10 with
Readout instrument connection.The vibration frequency of collected vibratory string 4 is transmitted to readout instrument by the communication cable 10 by excitation coil 8, from
And readout instrument can show the stress of the collected pipeline 12 of the strain transducer.
Protective cover 9 covers in outer protection tube 5, and the first side of protective cover 9 is connected with two welding substrates 2 by connector 91
It connects, and protective cover 9 is suitable for connector 91 for the rotation of center axis.
For example, with reference to Fig. 2, in a kind of implementation of the embodiment of the present application, the cross section of protective cover 9 can be arc,
Since a part of position is reserved in the upper surface of welding substrate 2, so as to which the first side of protective cover 9 is passed through connector 91 and two
The upper surface connection of a welding 2 the same side of substrate, such protective cover 9 can excitation coil 8 to the strain transducer and vibratory string 4 into
One step plays a protective role.And protective cover 9 is suitable for the connector 91 for the rotation of center axis, to facilitate opening for protective cover 9
It closes.
Soil pressure cell 13 is arranged on the outer wall of protective cover 9, and the soil pressure cell 13 be configured as monitoring pipeline 12 by
Native load.
For example, with reference to Fig. 1, in a kind of implementation of the embodiment of the present application, when protective cover 9 covers in outer protection tube 5 it
Afterwards, soil pressure cell 13 can be set on the outer wall of protective cover 9, it can the soil that is subject to of the real-time monitoring pipeline 12 by the soil pressure cell
Load, so combine the stress being subject to of pipeline 12 and the native load that is subject to can accurate measurements go out the safe condition of the pipeline 12.
Referring to Fig. 1, the longitudinal length of protective cover 9 can be greater than the distance between two welding substrates 2.For example, in the application
In a kind of implementation of embodiment, which can also cover two end blocks 3, thus the entire strain of protection as far as possible
Sensor.
The second side opposite with first side of protective cover 9 is fixed by welding on two welding substrates 2.Work as installation
After good excitation coil 8, it is closed protective cover 9,9 second side of protective cover can then be located at the upper surface of two welding 2 other sides of substrate,
Therefore after entire strain transducer is installed, the second side of protective cover 9 and two welding substrates 2 can be welded and fixed.
Referring to fig. 2, in a kind of implementation of the embodiment of the present application, the settable fire-proof asbestos layer of the inner wall of protective cover 9
92, it is suitable for protection vibratory string 4 and excitation coil 8.Such as it after strain transducer is installed on the outer wall of pipeline 12 by the later period, needs
To erosion resistant coating is prepared on the outer wall of pipeline 12 and strain transducer by way of hot melt, it is arranged in this way in the inner wall of protective cover 9
Fire-proof asbestos layer 92 can further protect excitation coil 8 and vibratory string 4.
Referring to Fig. 1, which may also include spring 6 and fastening nut 7, and spring 6 can be sleeved in outer protection tube 5,
It may be provided with screw thread on the outer wall of outer protection tube 5 between end block 3 and excitation coil 8, so that fastening nut 7 can be with 5 spiral shell of outer protection tube
Line connection, one end of spring 6 can be resisted against on end block 3, the other end and fastening nut 7 against.
For example, may be provided with one section of outer spiral shell on the outer wall of outer protection tube 5 in a kind of implementation of the embodiment of the present application
Fastening nut 7 is sleeved in outer protection tube 5 by line, and be threadedly coupled with outer protection tube 5, outer protection tube 5 close to this externally threaded one
End cap shock mount 6, thus when the both ends of outer protection tube 5 are fixed with two end blocks 2, so that spring 6 is located at end block 3 and fastening nut
Between 7, and the both ends of spring 6 can respectively with the side wall of the side wall of end block 3 and fastening nut 7 against.
Certainly, the application is not limited to that, can also be first by spring in other implementations of the embodiment of the present application
The side wall of 6 one end and one of end block 3, which passes through, to be welded and fixed, and then consolidates one end close apart from external screw thread of outer protection tube 5
It is scheduled in the end block 3, and spring 6 is sleeved in outer protection tube 5, so that the other end of spring 6 and the side wall of fastening nut 7 support
It leans on.
External screw thread in outer protection tube 5 can have certain length, so that fastening nut 7 may make to move in outer protection tube 5,
And then the movement of fastening nut 7 may make spring 6 to compress or stretch.
Pass through the initial of the range of the mobile adjustable strain transducer in position of the fastening nut 7 in outer protection tube 5
Value.For example, in a kind of implementation of the embodiment of the present application, what when 12 deformation of pipeline which can monitor was subject to
The range of stress value can be -1000 to 1000, wherein 0 to 1000 can indicate the stress value that is subject to when pipeline 12 stretches, -1000
The stress value being subject to when can indicate that pipeline 12 compresses to 0.Certainly, the application is not limited to that, in its of the embodiment of the present application
In his implementation, the range of the strain transducer is not limited in -1000 to 1000, or other numerical value.
Moreover, the positive and negative size for not implying that stress value that pipeline 12 is subject to of the range of the strain transducer, and refer to
The direction for the stress that pipeline 12 is subject to, in other implementations of the embodiment of the present application, 0 to 1000 may also indicate that pipeline 12 is pressed
The stress value being subject to when contracting, and -1000 to 0 can indicate the stress value being subject to when pipeline 12 stretches.
When the sensor is in normal condition, i.e., when the initial value of the sensor is located at 0, the compressive deformation that can be monitored is answered
The range of force value and the range of tensile deformation stress value are equal and relatively short.Therefore, when the sensor is in tensional state
When, the range for the compressive deformation stress value that can be monitored is opposite to be expanded, and equally, make the sensor when in a compressed state in advance,
The range for the tensile deformation stress value that can be monitored is also opposite to be expanded.
For example, in a kind of implementation of the embodiment of the present application, it, can when the shape for predicting that pipeline 12 occurs becomes compression
In advance by fastening nut 7 towards close to the movement of the direction of nearest end block 3, that is to say, that spring 6 is squeezed by fastening nut 7,
Spring 6 squeezes end block 3, and end block 3 drives outer protection tube 5 and 4 synchronizing moving of vibratory string, to stretch outer protection tube 5 and vibratory string 4.It is monitoring
Pipeline 12 generate compressive deformation when stress value when, the amount for the stress value that the compression that can expand the strain transducer can monitor is subject to
Journey.
Certainly, the application is not limited to that, in other implementations of the embodiment of the present application, for example, working as pre- test tube
It, then can be in advance by fastening nut 7 towards mobile close to the direction of excitation coil 8 when deformation occurs in road 12 to stretch, that is to say, that
Pull-off spring 6, spring 6 stretch end block 3, and end block 3 drives outer protection tube 18 and 4 synchronizing moving of vibratory string, to compress vibratory string 4 and outer shield
Pipe 5.When monitoring the generation tensile deformation of pipeline 12, the range for the stress value that the stretching that can expand the sensor can monitor is subject to.
Referring to Fig. 1 and Fig. 3, it may be provided with welding locating slot 11 on fixinig plate 1, this can be consolidated by the welding locating slot 11
Stator 1 is welded on the outer wall of pipeline 12.
For example, the lateral length of each fixinig plate 1 can be greater than each weldering in a kind of implementation of the embodiment of the present application
The lateral length of substrate 2 is connect, after welding substrate 2 and fixinig plate 1 are welded and fixed together in this way, the both ends of each fixinig plate 1
A part can be reserved, welding locating slot 11 can be respectively provided in the part at the both ends that each fixinig plate 1 reserves, can passed through in this way
The spot welding welding locating slot 11 is to fixinig plate 1 be welded and fixed on the outer wall of pipeline 12.It can be protected by way of spot welding
The outer wall for demonstrate,proving pipeline 12 is still relatively smooth smooth.
It, can will be on the both ends part of each fixinig plate 1 reserved in a kind of implementation of the embodiment of the present application
Welding locating slot 11 sequence is set in advance.
For example, with reference to Fig. 3, the welding locating slot 11 on the first side on one end of fixinig plate 1 is set as the first sequence, it will be with
The welding locating slot 11 on the adjacent both sides in first side is respectively set as the second sequence and third sequence, will be opposite with the first side
The welding locating slot 11 on one side is set as the 4th sequence.
First the outermost of fixinig plate 1 is welded on the outer wall of pipeline 12, then is gradually welded to centre.
The both ends of one of fixinig plate 1 are successively welded on the outer wall of pipeline 12 using the method for cross weld, so
Another fixinig plate 1 is welded on the outer wall of pipeline 12 in the method using same cross weld afterwards.So alternately successively
Welding can make fixinig plate 1 is smooth to be fixed on the outer wall of pipeline 12, thus when deformation occurs for pipeline 12, fixinig plate 1
The stress being subject to is uniform, so that the power transmitted between 12 outer wall of pipeline and fixinig plate 1 is more uniform and stable, thus strain transducer
The stress monitored is more accurate.
Wherein, cross weld method is concretely:
First weld the welding locating slot 11 of the infall of the first sequence and the second sequence, that is, in Fig. 3 the upper right corner weldering
Connect locating slot 11；
Then first second welding locating slot 11 sequentially of welding, to weld second second welding sequentially again fixed
Then position slot 11 returns to the first sequence welding third welding locating slot 11, it is fixed to return again to the second sequence welding third welding
Position slot 11, successively alternately welds the first sequence and the second welding locating slot 11 sequentially；
After the first sequence and the second welding locating slot 11 sequentially have all welded, the weldering of welding third sequentially
Connect locating slot 11；
After having welded the welding locating slot 11 of third sequentially, the welding locating slot 11 of welding the 4th sequentially, thus
The fixinig plate 1 of the part is welded on the outer wall of pipeline 12.
In addition, in a kind of implementation of the embodiment of the present application, the welding locating slot 11 at both ends on each fixinig plate 1
Welding sequence is symmetrical.Opposite, the direction phase of two the 4th sequences for example, with reference to Fig. 3, that is, the direction of two the first sequences
Instead, it can be the second sequence apart from farthest two sides, can be third sequence apart from nearest two sides.That is, when being welded and fixed
On piece 1 when the welding locating slot 11 of the other end, the welding locating slot 11 in the lower right corner can be first welded, then according to the side of cross weld
The welding locating slot 11 of method welding other positions.
Certainly, for the welding sequence for welding locating slot 11 on fixinig plate 1, the application is not limited in the above method,
In other implementations of the embodiment of the present application, other can also be designed and reasonably sequentially welded.
Certainly, the application is not limited to that, in other implementations of the embodiment of the present application, can also use other
Fixinig plate 1 is welded on the outer wall of pipeline 12 by reasonable method.
It is the welding substrate 2 of the strain transducer, end block 3, vibratory string 4, outer in a kind of implementation of the embodiment of the present application
Pillar 5, spring 6, protective cover 9 and connector 91 can be made of metal, thus convenient by welding by each portion
Part is fixed.Certainly, the application is not limited to that, can also will be each in other implementations of the embodiment of the present application
A component is made of other materials, it is possible to use other reasonable manners are fixedly connected.
Referring to Fig. 1-2, which may also include reinforcing rib 14 and the second communication cable 15, and reinforcing rib 14 can be matched
It is set to connection soil pressure cell 13 and protective cover 9, and the soil pressure cell 13 can be with the outer wall vertical of protective cover 9, the second communication cable
15 can connect with soil pressure cell 13.
For example, reinforcing rib 14 can be in cuboid in a kind of implementation of the embodiment of the present application, it can be by the reinforcing rib
14 first end is fixed on the outer wall of protective cover 9, and soil pressure cell 13 is fixed on to the second end of the reinforcing rib 14, so that
The soil pressure cell 13 is fixed as one with pipeline 12, and then can monitor the native load that the pipeline 12 is subject to.
For example, the soil pressure cell 13 can be rounded in a kind of implementation of the embodiment of the present application, by reinforcing rib 14
Extending direction is set as consistent with the radial direction of pipeline 12, and the reinforcing rib 14 is vertical with soil pressure cell 13, to may make
The outer wall vertical of the soil pressure cell 13 and protective cover 9, that is, the outer wall vertical with pipeline 12.It may make the soil pressure cell in this way
13 numerical value monitored and the native load that pipeline 12 is actually subject to are more consistent, and then can guarantee the strain transducer to pipeline 12
The accuracy of the monitoring of safe condition.
Soil pressure cell 13 can be connect with readout instrument or host computer by the second communication cable 15, so as to by the soil pressure
The native load value that the pipeline 12 that box 13 monitors is subject to is shown.
The embodiment of the present application also provides a kind of pipe safety method of discrimination, Fig. 4 is strain provided by the embodiments of the present application
Scheme of installation of the sensor on pipeline outer wall；Fig. 5 is the process of pipe safety method of discrimination provided by the embodiments of the present application
Figure；Fig. 6 is the flow chart provided by the embodiments of the present application that strain transducer is installed on pipeline；Fig. 7 mentions for the embodiment of the present application
The flow chart for preparing strain transducer supplied；Fig. 8 is the process provided by the embodiments of the present application being welded to fixinig plate on pipeline
Figure；Fig. 9 is the flow chart provided by the embodiments of the present application for preparing erosion resistant coating；Figure 10 is pipe safety provided by the embodiments of the present application
Discrimination matrix figure.
Referring to Fig. 5, in a kind of implementation of the embodiment of the present application, this method comprises:
Step S1 installs the strain transducer on pipeline to be monitored.
Step S2 reads the stress that the pipeline 12 that excitation coil 8 monitors is subject to, to obtain the stress variation of pipeline 12
Trend.
For example, staff can read in real time excitation on readout instrument in a kind of implementation of the embodiment of the present application
The stress that 12 deformation of pipeline that coil 8 monitors is subject to, to can be answered according to pipeline 12 in the stress that different moments are subject to
Power variation tendency.
For example, in a kind of implementation of the embodiment of the present application answering for pipeline 12 can be obtained according to following first formula
Power variation tendency:
Wherein,Indicate the stress that excitation coil 8 is subject in the pipeline 12 that t moment monitors；
Indicate the stress that excitation coil 8 is subject in the pipeline 12 that the t+1 moment monitors.
Step S3 reads the native load that the pipeline 12 that excitation coil 8 monitors is subject to, to obtain the soil that pipeline 12 is subject to
Load change trend.
For example, in a kind of implementation of the embodiment of the present application, can be obtained according to following second formula pipeline 12 by
Native load change trend:
Wherein,Indicate the native load that soil pressure cell 13 is subject in the pipeline 12 that t moment monitors；
Indicate the native loading force that soil pressure cell 13 is subject in the pipeline 12 that the t+1 moment monitors.
In addition, in a kind of implementation of the embodiment of the present application, on the content of step S2 and step S3 are not limited in
The sequence stated, in actual operation, step S2 and step S3 can carry out simultaneously.
Step S4 judges the safe condition of pipeline 12 according to stress variation trend and native load change trend.
For example, in a kind of implementation of the embodiment of the present application, when the stress value and pipeline 12 that pipeline 12 is subject to by
Native load value when being below 60%, pipeline 12 is in a safe condition；
When at least one of the native load value that stress value and pipeline 12 that pipeline 12 is subject to are subject to is higher than 60%, pipeline 12
It is in the hole；
When at least one of the native load value that stress value and pipeline 12 that pipeline 12 is subject to are subject to is higher than 90%, to pipeline
12 are handled immediately.
Specifically, referring to Figure 10, the state of pipeline 12 can include: safe condition, precarious position, is endangered at general state very much
Dangerous state immediately treats state.
As stress variation trend δpLess than 30% and native load change trend δsLess than 60%, or native load change trend δs
Less than 30% and stress variation trend δpWhen less than 60%, pipeline 12 is in a safe condition.
As stress variation trend δpWith native load change trend δsIt is all larger than 30% and when less than 60%, pipeline 12 is in one
As state.
As stress variation trend δpGreater than 60% and less than 90%, native load change trend δsLess than 60%, or native load becomes
Change trend δsGreater than 60% and less than 90%, stress variation trend δpWhen less than 60%, pipeline 12 is in the hole.
As stress variation trend δpWith native load change trend δsIt is all larger than 60% and when less than 90%, pipeline 12 is in non-
Normal precarious position.
As stress variation trend δpWith native load change trend δsAny one of be greater than 90 when, pipeline 12 be in immediately treat
State needs immediately to carry out pipeline 12 to put pipe operation.
In a kind of implementation of the embodiment of the present application, this method may also include that
When upper computer detection is to when the state of preceding pipeline 12 reaches precarious position, the caution sound of capable of emitting first intensity,
The performance for prompting staff to can detect pipeline 12 judges dangerous reason, is targetedly handled with facilitating pipeline 12.
When upper computer detection is to when the state of preceding pipeline 12 reaches abnormally dangerous state, the warning of capable of emitting second intensity
Sound prompts staff to detect pipeline 12 as early as possible and judges reason.
When upper computer detection is to when the state of preceding pipeline 12 reaches and immediately treats state, the warning of capable of emitting third intensity
Sound prompts staff that must carry out putting pipe operation at once.
Wherein, the intensity of sound of the first intensity to the second intensity to third intensity is gradually increased, to facilitate staff can
Work as the state of preceding pipeline 12 according to the judgement of the intensity of caution sound.
Certainly, other kinds of warning way can also be used for host computer in the application, or can also be for pipeline 12 not
Same state uses different types of warning way, in order to which staff more rapidly judges the current state of pipeline 12.
Specifically, referring to Fig. 6, in a kind of implementation of the embodiment of the present application, step S1 can include:
Step S11 selects the welding substrate 2 of correspondingly-sized according to the radius of curvature of pipeline 12, prepares strain transducer.
Since the first side of welding substrate 2 is arc, and the radius of curvature of different pipelines 12 is different, in order to enable welding base
The outer wall of the side fitting pipeline 12 of piece 2, can be first according to the pipeline 12 of sensor to be installed before preparing strain transducer
The welding substrate 2 of radius of curvature selection correspondingly-sized.
For example, with reference to Fig. 7, step S1 can include:
Step S111 prepares the welding substrate 2 of different size radius, and size radius is selected to be greater than the radius of curvature of pipeline 12
Welding substrate 2.
For example, the welding substrate 2 of different size radius prefabricated in advance, the size radius of welding substrate 2 refer to welding substrate 2
The first side radius.That is, selecting the half of the first side according to the radius of curvature of pipeline 12 when assembling strain transducer
Diameter is greater than the welding substrate 2 of the radius of pipeline 12, can guarantee that the outer wall of the first side for welding substrate 2 and pipeline 12 pastes in this way
It closes, so that the stress value of the pipeline 12 of strain transducer monitoring is more acurrate.
Two fixinig plates 1 can be welded and fixed with two welding substrates 2 respectively by step S112, and can be by each fixinig plate 2
Both ends reserve equal length, and the setting welding locating slot 11 on reserved fixinig plate 2.
For example, after for the welding substrate 2 of the radius selection correspondingly-sized of pipeline 12, first by the of each welding substrate 2
Side is fixed with fixinig plate 1 by welding, and can be designed as the lateral length of each fixinig plate 1 to be greater than welding base
The arc length of first side of piece 2 can be reserved identical after in this way fixing fixinig plate 1 and welding substrate 2 at the both ends of fixinig plate 1
The part of length, so that the setting welding locating slot 11 on the fixinig plate 1 of the reserved part, facilitates the later period to pass through each weldering of spot welding
Locating slot 11 is connect to be fixed on fixinig plate 1 on the outer wall of pipeline 12.
Certainly, the part at the both ends reserved for fixinig plate 1, the embodiment of the present application are not limited in above-mentioned length, at this
In other implementations for applying for embodiment, the length at the reserved both ends of fixinig plate 1 can also be inconsistent.
Outer protection tube 5 is sleeved on vibratory string 4 by step S113, and the both ends of outer protection tube 5 and the both ends of vibratory string 4 are welded admittedly
It is fixed.
For example, in a kind of implementation of the embodiment of the present application, since vibratory string 4 and outer protection tube 5 can be made of metal,
And the length of vibratory string 4 may be slightly larger than the length of outer protection tube 5, and therefore, first outer protection tube 5 can be sleeved on vibratory string 4, and by vibratory string 4
It is fixed with the both ends of outer protection tube 5, vibratory string 4 and outer protection tube 5 may make to be integrated in this way.
Spring 6 and fastening nut 7 are sleeved in outer protection tube 5 by step S114.
The fixed both ends of outer protection tube 5 and vibratory string 4 are separately fixed in two end blocks 3 by step S115.
For example, spring 6 and fastening nut 7 first can be sleeved on outer shield in a kind of implementation of the embodiment of the present application
On pipe 5, then the both ends of outer protection tube 5 are fixed with two end blocks 3 respectively.
Alternatively, can also be first fixed by one end of outer protection tube 5 and an end block 3 in two end blocks 3, then by 6 He of spring
Fastening nut 7 is sleeved in outer protection tube 5, then the other end of outer protection tube 5 and another end block 3 is fixed.
Certainly, for the connection between outer protection tube 5 and spring 6, fastening nut 7 and end block 3, the embodiment of the present application and not only
It is limited to said sequence, in other implementations of the embodiment of the present application, other reasonable sequential connection end blocks can also be used
3, outer protection tube 5, spring 6 and fastening nut 7.
Step S116 connects protective cover 9 by connector 91 in the same side of two end blocks 3.
For example, the both ends of the first side of protective cover 9 may be provided with connector 91, then will be protected by the connector 91
The first side of cover 9 is connected to the upper surface of the same side of two end blocks 3, so that the protective cover 9 can be by 91 conduct of connector
Central axis rotation facilitates the opening and closing of protective cover 9.
The first end of reinforcing rib 14 is fixed on the outer wall of protective cover 9 by step S117, and the second end of reinforcing rib 14 is connected
Connect soil pressure cell 13.
Step S12 excavates pipeline 12, polish to the default installation site of strain transducer on the outer wall of pipeline 12 straight
It is carefully cheated to smooth nothing.
The pipeline 12 of stress to be detected is excavated, substantially determines the installation site of strain transducer on the outer wall of pipeline 12, it will
The outer wall of the pipeline 12 of predetermined position is polished, until smooth nothing is carefully cheated, is prevented when installing strain transducer, due to pipe
12 outer wall of road rough and influence installation effect, to influence the accurate of the stress value of the pipeline 12 of strain transducer monitoring
Property.
Wherein, referring to fig. 4, on the outer wall of pipeline 12 strain transducer installation site can include: strain transducer along pipe
The installation site of the installation site of the axial direction of 12 outer wall of road and strain transducer along the circumferential direction of 12 outer wall of pipeline.
Since the first side of the welding substrate 2 of strain transducer is arc, and radian is consistent with the radian of 12 outer wall of pipeline,
Therefore, which can also install along the circumferential direction of the outer wall of pipeline 12, to monitor the ring of deep camber pipeline 12
Shape stress.
Strain transducer is placed on default installation site by step S13, using mash welder by the fixinig plate of strain transducer
1 is welded on the outer wall of pipeline 12.
For example, with reference to Fig. 8, in a kind of implementation of the embodiment of the present application, step S3 can include:
Step S131 welds the side of any one fixinig plate 1 in two fixinig plates 1 admittedly according to the method for cross weld
Determine onto the outer wall of pipeline 12, then the other side is welded and fixed on the outer wall of pipeline 12.
For example, with reference to Fig. 3, in a kind of implementation of the embodiment of the present application, can by each fixinig plate 1 reserve both ends
Welding locating slot 11 preset a welding sequence, first weld the infall of the first sequence and the second sequence welding positioning
Then slot 11, that is, the welding locating slot 11 in the upper right corner weld first sequentially second welding locating slot 11, then weld the
Two sequentially second welding locating slot 11 return again to the first sequence welding third welding locating slot 11, it is suitable to return again to second
Sequence welds third welding locating slot 11, then successively alternately welds the first sequence and the second welding locating slot 11 sequentially.
After having welded the first sequence and the second welding locating slot 11 sequentially, all welding of welding third sequentially are fixed
Position slot 11, then welds the 4th welding locating slot 11 sequentially again.
After the completion of the welding locating slot 11 of outermost is welded, then gradually weld middle section.
The other end of the fixinig plate 1 is welded in the one end for having welded a fixinig plate 1, by the lower right corner on the fixinig plate 1 at the end
Welding locating slot 11, the welding sequence that locating slot 11 is welded on two-part fixinig plate 1 is symmetrical, that is, two first
The direction of sequence is opposite, two the 4th sequences it is contrary.
Another fixinig plate 1 is welded and fixed on the outer wall of pipeline 12 according to the cross weld method by step S132.
The excitation coil 8 of strain transducer is installed in the outer protection tube 5 of the strain transducer by step S14.
For example, entire strain transducer can be installed to pipeline 12 in a kind of implementation of the embodiment of the present application
Outer wall on after, open protective cover 9, excitation coil 8 is installed in outer protection tube 5.
Alternatively, excitation coil 8 can also be installed in outer protection tube 5 when assembling strain transducer.Certainly, the application
In embodiment, said sequence is not limited in for the installation of excitation coil 8, will be swashed before the range for determining the strain transducer
Coil 8 is encouraged to be installed in outer protection tube 5.
Step S15 adjusts the position of the fastening nut 7 of strain transducer, determines the strain transducer using readout instrument
Range.
For example, by adjusting the position of fastening nut 7, thus it is possible to vary the state of spring 6, to influence the strain transducer
Range.When spring 6 is in tensional state, entire strain transducer is in compressive state, may stretch suitable for monitoring
The stress of the pipeline 12 of deformation.When spring 6 is when in a compressed state, entire strain transducer is in tensional state, is suitable for monitoring
The stress of the pipeline 12 of compressive deformation may occur.Therefore, can the deformation that may occur of the look-ahead pipeline 4, so as to adjust
The range of the strain transducer.
Excitation coil 8 is connect with readout instrument, by adjusting the position of fastening nut 7, excitation coil 8 can acquire in real time
The vibration frequency of vibratory string 4, so that readout instrument reads the range of the strain transducer.
Step S16, it is ensured that after strain transducer monitoring is stablized, close the protective cover 9 of strain transducer and by the protective cover 9
Second side be welded on the end block 3 of strain transducer.
For example, excitation coil 8 is connect by communication cable 10 with readout instrument, the pipeline 12 that observed reading instrument is read is answered
Whether force value is stable, when the stress value that readout instrument is read within a certain period of time is constant, it can be ensured that strain transducer monitoring is stablized.
The protective cover 9 of the strain transducer is closed, the protective cover 9 is by two end blocks 3, outer protection tube 5, spring 6, fastening nut 7 and motivates
Coil 8 covers, at this point, the first side of protective cover 9 is connect by connector 91 with the welding substrate 2 of 3 side of end block, protects
The second side of cover 9 is located on the welding substrate 2 of the opposite other side of end block 3, then by the second side of the protective cover 9 and weldering
Substrate 2 is connect to be welded and fixed.
Step S17 prepares erosion resistant coating in the outer wall of protective cover 9 and pipeline 12.
For example, with reference to Fig. 9, in a kind of implementation of the embodiment of the present application, step S7 can include:
Step S171 uses the protective cover 9 of viscoelastic body covering strain transducer.
The protective cover 9 that each strain transducer is covered using viscoelastic body, seal each sensor and pipeline 12 outer wall it
Between gap.
Step S172 coats the outer wall of entire pipeline 12 using hot tape wrap, using heat gun hot melt thermal tape wrap until heat twines
Band is together with viscoelastic body clinkering.
In order to protect the pipeline 12 after installation strain transducer, hot tape wrap can be used and pass the outer wall of pipeline 12 and strain
Sensor is coated togather, and is then heated using heat gun to hot tape wrap, until by hot tape wrap together with viscoelastic body clinkering.
Both strain transducer and the cladding of pipeline 12 can be integrated, antisepsis can also be played, and reduce extraneous factor to pipeline 12
With the corrosion failure of strain transducer.Certainly, the application is not limited to that, in other implementations of the embodiment of the present application
In, after using viscoelastic body covering strain transducer, outer wall and strain that Cold winding band coats entire pipeline 12 also can be used
Condensing zone and viscoelastic body are coagulated together by sensor, then the method by condensing.Alternatively, other reasonable sides also can be used
Method prepares erosion resistant coating.
Selection is greater than the welding substrate 2 of the radius of curvature of 12 outer wall of pipeline in this method, it is ensured that the of welding substrate 2
Side is bonded with 12 outer wall of pipeline, so that the stress of the pipeline 12 of sensor monitoring is more accurate.By lateral length
It is fixed greater than the fixinig plate 1 of the lateral length of welding substrate 2 and welding substrate 2, on the one hand due to the flexibility and bullet of fixinig plate 1
Property, fixinig plate 1 can be made to be fitted on the outer wall of pipeline 12 completely, weldering on the other hand is set in the part that fixinig plate 1 is reserved
Locating slot 11 is connect, may further ensure that the kiss of the outer wall of entire strain transducer and pipeline 12 by the way of cross weld
It closes, improves the uniformity of the stability and stress transfer between strain transducer and the outer wall of pipeline 12.Moreover, this is answered in this way
Becoming sensor can also install along the circumferential direction of pipeline 12, to monitor the belt stress of pipeline 12.In addition, protective cover 9 can
It is rotated by center axis of first side, is easy to open and is closed.The fire-proof asbestos layer 92 of 9 inner wall of protective cover is in subsequent preparation anti-corrosion
When layer, end block 3, vibratory string 4, spring 6 and fastening nut 7 can also be protected.Finally after installing strain transducer, straining
Erosion resistant coating is prepared using viscoelastic body and hot tape wrap on the outer wall of sensor and pipeline 12, it can further protective conduit 12 and strain
Sensing.
The above content is combine specific preferred embodiment to the further description of the invention made, and it cannot be said that originally
The specific embodiment of invention is only limited to these instructions.For those of ordinary skill in the art to which the present invention belongs,
The other embodiments obtained in the case where not departing from technical solution of the present invention, should be included within the scope of the present invention.
Claims (17)
1. a kind of strain transducer, which is characterized in that the strain transducer includes two fixinig plates (1), two welding substrates
(2), two end blocks (3), vibratory string (4), outer protection tube (5), excitation coil (8), protective cover (9) and soil pressure cell (13), wherein
Described two fixinig plates (1) are fitted on the outer wall of pipeline (12) suitable for convertible curvature；
Described two welding substrates (2) are separately fixed on described two fixinig plates (1), and each welding substrate (2)
The first side contacted with the fixinig plate (1) is the outer wall of arc fitting；
Described two end blocks (3) are separately fixed on described two welding substrates (2)；
The outer protection tube (5) is sleeved on the vibratory string (4), the both ends of the outer protection tube (5) respectively with the vibratory string (4) two
End is fixed, and the both ends of the fixed outer protection tube (5) and the vibratory string (4) are fixed in described two end blocks (3)；
The excitation coil (8) is removably mounted on the outer protection tube (5)；
The protective cover (9) covers on the outer protection tube (5), the first side of the protective cover (9) and described two welding bases
Piece (2) is connected by connector (91), and the protective cover (9) is suitable for the connector (91) for the rotation of center axis；
The soil pressure cell (13) is arranged on the outer wall of the protective cover (9), and the soil pressure cell (13) is configured as supervising
Survey the native load that the pipeline (12) is subject to.
2. strain transducer according to claim 1, which is characterized in that the cross section of the protective cover (9) is arc-shaped, and
The longitudinal length of the protective cover (9) is greater than the distance between described two welding substrates (2).
3. strain transducer according to claim 1, which is characterized in that the protective cover (9) with the first side
Opposite second side is fixed by welding on described two welding substrates (2).
4. strain transducer according to claim 1, which is characterized in that the inner wall of the protective cover (9) is provided with fire prevention
Asbestos layer (92) is suitable for protecting the vibratory string (4) and the excitation coil (8).
5. strain transducer according to claim 1, which is characterized in that the strain transducer further include spring (6) and
Fastening nut (7), the spring (6) is sleeved on the outer protection tube (5), between the end block (3) and the excitation coil (8)
The outer protection tube (5) outer wall on be provided with screw thread, the fastening nut (7) is threadedly coupled with the outer protection tube (5), described
One end of spring (6) is resisted against on the end block (3), the other end and the fastening nut (7) against.
6. strain transducer according to claim 1, which is characterized in that be provided with welding positioning on the fixinig plate (1)
The fixinig plate (1) is welded on the outer wall of the pipeline (12) by slot (11) by the welding locating slot (11).
7. strain transducer according to claim 1, which is characterized in that the strain transducer further includes the first communication electricity
Cable (10), the excitation coil (8) are connect by first communication cable (10) with readout instrument.
8. strain transducer described in -7 according to claim 1, which is characterized in that the strain transducer further includes reinforcing rib
(14) and the second communication cable (15), the reinforcing rib (14) are configured as connecting the soil pressure cell (13) and the protective cover
(9), and the outer wall vertical of the soil pressure cell (13) and the protective cover (9), second communication cable (15) and the soil
Pressure cell (13) connection.
9. a kind of pipe safety method of discrimination, which is characterized in that be applied to strain transducer according to any one of claims 8, the side
Method includes:
The strain transducer is installed on pipeline to be detected；
The stress that the pipeline (12) that the excitation coil (8) monitors is subject to is read, to obtain the pipeline (12)
Stress variation trend；
The native load that the pipeline (12) that the soil pressure cell (13) monitors is subject to is read, to obtain the pipeline (12)
The native load change trend being subject to；
According to the stress variation trend and the native load change trend, the safe condition of the pipeline (12) is judged.
10. pipe safety method of discrimination according to claim 9, which is characterized in that described to be installed on pipeline to be detected
The monitoring strain transducer, comprising:
The welding substrate (2) that correspondingly-sized is selected according to the radius of curvature of the pipeline (12), prepares the strain sensing
Device；
The pipeline (12) are excavated, the default installation site of the strain transducer on the outer wall of the pipeline (12) is polishing to
Smooth nothing is carefully cheated；
The strain transducer is placed on the default installation site, using mash welder by the fixinig plate of the strain transducer
(1) it is welded on the outer wall of the pipeline (12)；
The excitation coil (8) of the strain transducer is installed in the outer protection tube (5) of the strain transducer；
The position for adjusting the fastening nut (7) of the strain transducer, the range of the strain transducer is determined using readout instrument；
After ensuring that strain transducer monitoring is stablized, the protective cover (9) of the strain transducer is closed and by the protective cover
(9) second side is welded on the welding substrate (2) of the strain transducer；
Erosion resistant coating is prepared in the outer wall of the protective cover (9) and the pipeline (12).
11. pipe safety method of discrimination according to claim 10, which is characterized in that described to prepare the strain sensing
Device, comprising:
The welding substrate (2) of different size radius is prepared, size radius is selected to be greater than the radius of curvature of the pipeline (12)
The welding substrate (2)；
Two fixinig plates (1) are welded and fixed with two welding substrates (2) respectively, and by each fixinig plate
(1) equal length is reserved at both ends, and setting welding locating slot (11) on the reserved fixinig plate (1)；
The outer protection tube (5) is sleeved on the vibratory string (4), and by the both ends of the outer protection tube (5) and the vibratory string (4)
Both ends are welded and fixed；
The spring (6) and the fastening nut (7) are sleeved on the outer protection tube (5)；
The both ends fixed with the vibratory string (4) of the outer protection tube (5) are separately fixed in two end blocks (3)；
The first side of the protective cover (9) is connected by connector (91) in the same side of two end blocks (3)；
The first end of the reinforcing rib (14) is fixed on the outer wall of the protective cover (9), by the of the reinforcing rib (14)
Two ends connect the soil pressure cell (13).
12. pipe safety method of discrimination according to claim 10, which is characterized in that the default installation site, comprising:
The strain transducer is along the installation site of the axial direction of the pipeline (12) outer wall and the strain sensing described in
The installation site in the circumferential direction of pipeline (12) outer wall.
13. pipe safety method of discrimination according to claim 10, which is characterized in that described to be answered by described in using mash welder
The fixinig plate (1) for becoming sensor is welded on the outer wall of the pipeline (12), comprising:
The side of any of two fixinig plates (1) fixinig plate (1) is welded admittedly according to the method for cross weld
It is scheduled on the outer wall of the pipeline (12), then the other side is weldingly fixed on the outer wall of the pipeline (12)；
Another described fixinig plate (1) is welded and fixed to the outer wall of the pipeline (12) according to the method for the cross weld
On.
14. pipe safety method of discrimination according to claim 10, which is characterized in that it is described in the strain transducer and
The outer wall of the pipeline (12) prepares erosion resistant coating, comprising:
The protective cover (9) are covered using viscoelastic body；
The outer wall that the entire pipeline (12) is coated using hot tape wrap heats the hot tape wrap using heat gun until the heat twines
Band is together with the viscoelastic body clinkering.
15. pipe safety method of discrimination according to claim 9, which is characterized in that the pipeline (12) of obtaining
Stress variation trend includes:
The stress variation trend of the pipeline (12) is obtained according to following first formula:
Wherein,Indicate the stress that the excitation coil (8) is subject in the pipeline (12) that t moment monitors；
Indicate the stress that the excitation coil (8) is subject in the pipeline (12) that the t+1 moment monitors.
16. pipe safety method of discrimination according to claim 9, which is characterized in that it is described obtain the pipeline (12) by
To native load change trend include:
The native load change trend that the pipeline (12) is subject to is obtained according to following second formula:
Wherein,Indicate the native load that the soil pressure cell (13) is subject in the pipeline (12) that t moment monitors；
Indicate the native loading force that the soil pressure cell (13) is subject in the pipeline (12) that the t+1 moment monitors.
17. the pipe safety method of discrimination according to any one of claim 9-16, which is characterized in that described according to
Stress variation trend and the native load change trend, judge that the safe condition of the pipeline (12) includes:
When the native load value that stress value and the pipeline (12) that the pipeline (12) is subject to are subject to is below 60%, the pipe
Road (12) is in a safe condition；
When at least one of the native load value that stress value and the pipeline (12) that the pipeline (12) is subject to are subject to is higher than 60%
When, the pipeline (12) is in the hole；
When at least one of the native load value that stress value and the pipeline (12) that the pipeline (12) is subject to are subject to is higher than 90%
When, the pipeline (12) is handled immediately.
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| WO2003091683A1 (en) * | 2002-04-24 | 2003-11-06 | Weatherford/Lamb, Inc. | Displacement based pressure sensor measuring unsteady pressure in a pipe |
| CN101667326A (en) * | 2008-09-03 | 2010-03-10 | 中国石油天然气股份有限公司 | Method and system for monitoring and warning influence of landslide on pipeline |
| CN206330691U (en) * | 2016-11-14 | 2017-07-14 | 昆明畅唯银河科技有限公司 | A kind of vibratory string device |
| CN109781324A (en) * | 2019-01-07 | 2019-05-21 | 中国石油天然气股份有限公司 | Pipeline meter Sai Si stress monitoring system and method |
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|---|---|---|---|---|
| WO2003091683A1 (en) * | 2002-04-24 | 2003-11-06 | Weatherford/Lamb, Inc. | Displacement based pressure sensor measuring unsteady pressure in a pipe |
| CN101667326A (en) * | 2008-09-03 | 2010-03-10 | 中国石油天然气股份有限公司 | Method and system for monitoring and warning influence of landslide on pipeline |
| CN206330691U (en) * | 2016-11-14 | 2017-07-14 | 昆明畅唯银河科技有限公司 | A kind of vibratory string device |
| CN109781324A (en) * | 2019-01-07 | 2019-05-21 | 中国石油天然气股份有限公司 | Pipeline meter Sai Si stress monitoring system and method |
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