CN109781324A - Pipeline meter Sai Si stress monitoring system and method - Google Patents
Pipeline meter Sai Si stress monitoring system and method Download PDFInfo
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- CN109781324A CN109781324A CN201910012189.9A CN201910012189A CN109781324A CN 109781324 A CN109781324 A CN 109781324A CN 201910012189 A CN201910012189 A CN 201910012189A CN 109781324 A CN109781324 A CN 109781324A
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Abstract
The present invention relates to oil-gas pipeline monitoring technical field, a kind of pipeline meter Sai Si stress monitoring system and method are provided.The system includes at least five stress monitoring sensors (1), communication cable (2) and pipeline marker stake (3), communication module (33), power supply unit (31) and protection structure (34) that pipeline marker stake (3) includes collector (32), connect with host computer；Stress monitoring sensor (1) includes the fixinig plate (13), excitation coil (16), spring (14) and fastening nut (15) of vibratory string (17), the outer protection tube (18) being sleeved on vibratory string (17), two end blocks (12), welding substrate (11), welding substrate (11) lower section fitting pipeline (4) outer wall；At least four stress monitoring sensors (1) are axially disposed within pipeline (4) outer wall evenly and at intervals, at least one stress monitoring sensor (1) is arranged circumferentially in pipeline (4) outer wall.The system can monitor the circumferential direction and axial stress of pipeline.
Description
Technical field
The present invention relates to oil-gas pipeline monitoring technical field, in particular to a kind of pipeline meter Sai Si stress monitoring system and 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 of geological disaster or cal rolling etc., when buried long distance pipeline meter Sai Si stress be more than surrender pole
After limit, pipeline will occur surrender failure and even be broken.Therefore, it needs to carry out stress monitoring to pipeline before designing pipeline.
The stress of long-distance oil & gas pipeline includes axial stress and circumference stress.Currently used monitoring line process is to pass through
Strain transducer monitors the size of the axial stress of pipeline, and the circumferential direction that traditional strain transducer can not effectively monitor pipeline is answered
Power can only be calculated according to the internal pressure of tube wall, the maximum of pipeline is calculated according to the relationship of axial stress and circumference stress
Meter Sai Si stress value is compared with the yield limit of tubing, judges the safe condition of pipe stress.
During realization of the invention, the inventor finds that the existing technology has at least the following problems:
Strain transducer in presently relevant technology can not effectively monitor the circumference stress of pipeline, ring obtained by calculation
Most rice plug this stress value that can not accurately show the circumference stress of the pipeline to stress, therefore obtain is also inaccuracy,
The safe condition for the pipe stress judged is equally inaccurate.
Summary of the invention
In view of this, the embodiment of the invention provides a kind of pipeline meter Sai Si stress monitoring system and methods, accurately to supervise
The circumference stress and axial stress in test tube road obtain most this stress of rice plug, thus the safe condition of accurate judgement pipe stress.
Specific technical solution is as follows:
The embodiment of the present application provides a kind of pipeline meter Sai Si stress monitoring system, including at least five stress monitorings sensing
Device, communication cable and pipeline marker stake, wherein
It is suitable that power supply unit, collector, communication module and protection structure, the collector are provided in the pipeline marker stake
In the circumference stress value and axial tension stress of acquisition pipeline, and the collected stress value is transmitted by the communication module
To host computer, said supply unit is suitable for the collector and communication module power supply, and the protection structure is located at described
Inside below pipeline marker stake is suitable for protecting the collector and said supply unit；
The stress monitoring sensor includes two welding substrates, two end blocks, two fixinig plates, vibratory string, outer protection tube, bullets
Spring and fastening nut, the outer protection tube are sleeved on the vibratory string, and are fixed with the vibratory string, and the excitation coil is removably
It is mounted in the outer protection tube, the both ends of the vibratory string are separately fixed in described two end blocks, and described two end blocks are solid respectively
It is scheduled on described two welding substrates, described two welding substrates are separately fixed on described two fixinig plates, described two solid
Stator is fitted on pipeline outer wall suitable for convertible curvature, and the spring pocket is located at the excitation in the outer protection tube
Between the end block of any of one end of coil and described two end blocks, one end of the spring is fixedly connected with the end block, separately
One end and the fastening nut are against being arranged external screw thread, the fastening nut and the outer protection tube on the outer wall of the outer protection tube
It is threadedly coupled；
Four stress monitoring sensors are in axial direction arranged in evenly and at intervals on the outer wall of the pipeline, and one
Circumferentially direction is arranged on the outer wall of the pipeline stress monitoring sensor；
The both ends of the communication cable are connect with the excitation coil and the collector respectively, suitable for supervising the stress
The stress for surveying sensor monitoring uploads on the collector of the pipeline marker stake.
Selectively, it is provided with welding locating slot on the fixinig plate, is welded on pipeline outer wall by the fixinig plate
When pass through the welding locating slot and determine the position of the fixinig plate.
Selectively, any one end block in described two end blocks is provided with groove, the both ends difference of the outer protection tube
In the groove of described two end blocks.
Selectively, a stress monitoring sensor in at least two stress monitorings sensor is along pipeline
Axial direction is mounted on pipeline outer wall, the stress of the axial direction suitable for monitoring pipeline；Another described stress monitoring passes
Sensor is mounted on pipeline outer wall along the circumferential direction of pipeline, suitable for monitoring the stress in pipeline circumferential direction direction.
Selectively, the length of the excitation coil is less than the distance between described two end blocks.
Selectively, the excitation coil is suitable for that the vibratory string is motivated to vibrate, and the frequency for acquiring the vibratory string is logical
It crosses the communication cable and is transmitted to the collector.
Selectively, the pipeline marker stake further includes solar panel, and the solar panel is located at the pipe
The top of road marker peg, is suitable for said supply unit power supply, and the outer wall of the pipeline marker stake is glass fibre reinforced plastic structure, the guarantor
Protection structure is sleeved between said supply unit and the collector and the outer wall of the pipeline marker stake.
Selectively, the top of the protection structure is glass fibre reinforced plastic structure, and lower part is metal structure, said supply unit and
The collector is located at the inner cavity of the protection structure, and the protection structural top is provided with through-hole, and it is single to be suitable for the power supply
The electric wire of member is passed through and is connect with the solar panel and the electric wire of the communication module passes through.
Selectively, it is provided with nut on the through-hole of the protection structure, is suitable for fixed said supply unit and described logical
Interrogate the electric wire of module.
The embodiment of the present application also provides a kind of pipeline meter Sai Si stress monitoring methods, comprising:
The stress value of the pipeline is monitored using the stress monitoring sensor；
The circumference stress value of the pipeline monitored and axial tension stress be transferred to by the communication cable described
Collector；
The collected axial tension stress and the circumference stress value are transferred to host computer by the collector；
The circumference stress value and the axial tension stress computer tube of the host computer according to the pipeline received
This stress value of the most rice plug in road.
Selectively, the stress value that the pipeline is monitored using the stress monitoring sensor, further includes:
Adjust the initial value of the range of the stress monitoring sensor；
Five stress monitoring sensors are welded to the pipeline along the circumferential direction and axial direction of the pipeline respectively
On outer wall；
When the pipeline is by deformation, the excitation coil excitation vibratory string of the stress monitoring sensor is vibrated and is adopted
Collect the stress that the pipeline deformation is subject to.
Selectively, described to weld five stress monitoring sensors along the circumferential direction and axial direction of the pipeline respectively
It is connected on the pipeline outer wall, comprising:
Axial direction by four stress monitoring sensors along the pipeline is installed, and the axial direction for monitoring the pipeline is answered
Force value；
One stress monitoring sensor is installed along pipeline circumferential direction direction, monitors the circumference stress of the pipeline
Value.
Selectively, the initial value of the range of the adjustment stress monitoring sensor, comprising:
Position of the mobile fastening nut in the outer protection tube, squeezes the spring, to stretch the vibratory string, thus
The range initial value for monitoring the stress that the pipeline compressive deformation is subject to of the stress monitoring sensor is adjusted, is answered described in expansion
The range for the stress being subject to when compressive deformation occurs for the pipeline of power monitoring sensor monitoring；
Position of the mobile fastening nut in the outer protection tube, loosens the spring, to compress the vibratory string, thus
The range initial value for monitoring the stress that the pipeline tensile deformation is subject to of the stress monitoring sensor is adjusted, is answered described in expansion
The range for the stress being subject to when tensile deformation occurs for the pipeline of power monitoring sensor monitoring.
Selectively, described when the pipeline is by deformation, the excitation coil of the stress monitoring sensor is adopted
Collect the stress value of the pipeline, comprising:
When deformation occurs for the pipeline, it is welded to the distance between two described fixinig plates on pipeline outer wall hair
It is raw to change；
Deformation occurs for vibratory string described in two fixinig plate synchronous drives；
The excitation coil motivates the vibratory string to vibrate, and acquires vibration frequency.
Selectively, the collected axial tension stress and the circumference stress value are transferred to upper by the collector
Machine, comprising:
The collected axial tension stress and the circumference stress value are transferred to the communication module by the collector；
The axial tension stress received and the circumference stress value are uploaded to the host computer by the communication module.
Selectively, the host computer is according to the circumference stress value of the pipeline received and the axial stress
Value calculates this stress value of the most rice plug of the pipeline, comprising:
The section for taking the pipeline is established cartesian coordinate system by origin of center location, is obtained each along the pipeline
The coordinate of the stress monitoring sensor mounting location of axial direction setting；
There are the relationship of following first formula between the described four stress monitoring sensors being in axial direction arranged, according to
Transverse and longitudinal coordinate, radius and the stress value of four stress monitoring sensor mounting locations determine the parameter value of undetermined parameter:
Ax+by+cr+pz=1
Wherein, a, b, c, p are the undetermined coefficient,
X is the abscissa of the stress monitoring sensor mounting location,
Y is the ordinate of the stress monitoring sensor mounting location,
R is the radius of the stress monitoring sensor mounting location,
Z is the stress value of the stress monitoring sensor；
The parameter value of the determining undetermined parameter is substituted into following second formula, obtains maximum axial stress value:
By the maximum axial stress value and the circumferentially stress value substitution of the stress monitoring sensor of direction setting
Following third formula obtain described most this stress of rice plug:
Wherein, E is elasticity modulus；
|εE| for the stress value of the stress monitoring sensor in circumferential direction.
Selectively, the method also includes:
This stress value of the most rice plug for the pipeline that the host computer is obtained judges the pipe compared with yield limit
Whether road is in a safe condition.
Technical solution bring beneficial effect provided in an embodiment of the present invention includes at least:
Pipeline meter Sai Si stress monitoring system provided in an embodiment of the present invention monitors pipeline by stress monitoring sensor
Circumference stress and axial stress adjust the initial value of range by the spring on the stress monitoring sensor, in monitoring pipeline
When stress, can avoid due to the deformation quantity of pipeline excessive no to scale can not accurate measurements go out stress.The fixinig plate of the sensor
Be bonded while curvature can be converted the outer wall of pipeline, therefore when deformation occurs for pipeline, be fitted in fixinig plate on pipeline outer wall with
Be subjected to displacement, so that relative displacement occur by welding substrate, and the deformation that pipeline occurs is transferred to vibratory string by end block, is caused
Vibratory string stretches or compression.Excitation coil excitation vibratory string vibrates, and acquires the frequency of vibratory string, and then by collected vibratory string
Frequency be transferred to collector by communication cable.The fixinig plate of the stress monitoring sensor can be bonded pipeline outer wall, more
Accurately stress value of the pipeline when deformation occurs at monitoring, and stress monitoring sensing is in axial direction mounted on pipeline
The axial stress that pipeline can be monitored when upper, can monitor the circumference stress of pipeline when circumferentially direction is mounted on pipeline.It adopts
The axial stress of collected pipeline and circumference stress are uploaded to host computer by communication module by storage, so that host computer is according to pipe
The axial stress and circumference stress in road obtain this stress of the most rice plug of pipeline, and staff is facilitated to judge whether pipeline is in peace
Total state.The system can monitor the circumference stress and axial stress of pipeline simultaneously.
Detailed description of the invention
It to describe the technical solutions in the embodiments of the present invention more clearly, below will be to needed in the embodiment
Attached drawing is briefly described.
Fig. 1 is the structural schematic diagram of pipeline meter Sai Si stress monitoring system provided by the embodiments of the present application；
Fig. 2 is the overlooking structure diagram of stress monitoring sensor provided by the embodiments of the present application；
Fig. 3 is the left view structural representation of stress monitoring sensor provided by the embodiments of the present application；
Fig. 4 is the flow chart of pipeline meter Sai Si stress monitoring method provided by the embodiments of the present application；
Fig. 5 is the flow chart provided by the embodiments of the present application that pipe stress is monitored using stress monitoring sensor；
Fig. 6 is the flow chart of the range initial value of adjustment stress monitoring sensor provided by the embodiments of the present application；
Fig. 7 is the flow chart provided by the embodiments of the present application being welded to stress monitoring sensor on pipeline outer wall；
Fig. 8 be pipeline provided by the embodiments of the present application by deformation when excitation coil acquire pipeline stress value flow chart；
Collected axial stress and circumference stress are transmitted to host computer for collector provided by the embodiments of the present application by Fig. 9
Flow chart；
Figure 10 is the flow chart provided by the embodiments of the present application for calculating most this stress of rice plug.
Appended drawing reference in figure respectively indicates:
1-stress monitoring sensor；11-welding substrates；12-end blocks；13-fixinig plates；131-welding locating slots；
14-springs；15-fastening nuts；16-excitation coils；17-vibratory strings；18-outer protection tubes；
2-communication cables；
3-pipeline marker stakes；31-power supply units；32-collectors；33-communication modules；34 --- protection structure；
341 --- through-hole；35 --- solar panel；
4-pipelines.
Specific embodiment
To keep the technical solution and advantage of the embodiment of the present application clearer, below in conjunction with attached drawing to the application embodiment party
Formula is described in further detail.
The total technical concept of the embodiment of the present application is introduced first.
Pipeline meter Sai Si stress monitoring system provided by the embodiments of the present application, including at least two stress monitoring sensors,
Communication cable and pipeline marker stake.It is provided with power supply unit, collector, communication module and protection structure in pipeline marker stake, adopts
Storage is suitable for acquiring the circumference stress value and axial tension stress of pipeline, and collected stress value is transmitted to by communication module
Host computer, power supply unit are suitable for collector and communication module power supply；Stress monitoring sensor includes two welding substrates, two
End block, two fixinig plates, vibratory string, outer protection tube, spring and fastening nut, outer protection tube are sleeved on vibratory string, and are fixed with vibratory string, are swashed
It encourages coil to be removably mounted in outer protection tube, the both ends of vibratory string are separately fixed in two end blocks, and two end blocks are fixed respectively
On two welding substrates, two welding substrates are separately fixed on two fixinig plates, and two fixinig plates are suitable for convertible curvature
Ground is fitted on the outer wall of pipeline, and spring pocket is in outer protection tube, any of one end of excitation coil and two end blocks end block
Between, one end of spring is fixedly connected with end block, the other end and fastening nut against, external screw thread is set on the outer wall of outer protection tube,
Fastening nut is threadedly coupled with outer protection tube；Pipeline is in axial direction arranged at least four stress monitorings sensing evenly and at intervals
On outer wall, circumferentially direction is arranged on the outer wall of pipeline at least one stress monitoring sensor；Distinguish at the both ends of communication cable
It is connect with excitation coil and collector, the stress suitable for monitoring stress monitoring sensor uploads to the collector of pipeline marker stake
On.
Pipeline meter Sai Si stress monitoring system is answered by the circumference stress that stress monitoring sensor monitors pipeline with axial
Power adjusts the initial value of range by the spring on the stress monitoring sensor, when monitoring the stress of pipeline, can avoid because of pipe
The excessive no to scale of the deformation quantity in road and can not accurate measurements go out stress.The fixinig plate of the sensor is bonded in which can convert curvature
The outer wall of pipeline, therefore when deformation occurs for pipeline, the fixinig plate being fitted on pipeline outer wall is subjected to displacement therewith, to pass through
It welds substrate and relative displacement occurs, and the deformation that pipeline occurs is transferred to vibratory string by end block, and vibratory string is caused to stretch or compress.Swash
It encourages coil stimulating vibratory string to vibrate, and acquires the frequency of vibratory string, and then the frequency of collected vibratory string is passed through into communication cable
It is transferred to collector.The fixinig plate of the stress monitoring sensor can be bonded pipeline outer wall, monitor place's pipeline more accurately and exist
Stress value when deformation occurs, and by the stress monitoring sensing be in axial direction mounted on pipeline when can monitor pipeline
Axial stress can monitor the circumference stress of pipeline when circumferentially direction is mounted on pipeline.Collector is by collected pipeline
Axial stress and circumference stress host computer is uploaded to by communication module, thus axial stress and circumferential direction of the host computer according to pipeline
Stress obtains this stress of the most rice plug of pipeline, and staff is facilitated to judge whether pipeline is in a safe condition.The system can be same
When monitor pipeline circumference stress and axial stress.
The embodiment of the present application provides a kind of pipeline meter Sai Si stress monitoring system, and Fig. 1 is the structural schematic diagram of the system；
Fig. 2 is the structural schematic diagram of stress monitoring sensor in the system；Fig. 3 is stress monitoring sensor provided by the embodiments of the present application
Left view structural representation；Fig. 4 is the flow chart of pipeline meter Sai Si stress monitoring method provided by the embodiments of the present application；Fig. 5 is
Flow chart provided by the embodiments of the present application using stress monitoring sensor monitoring pipe stress；Fig. 6 mentions for the embodiment of the present application
The flow chart of the range initial value of the adjustment stress monitoring sensor of confession；Fig. 7 is provided by the embodiments of the present application by stress monitoring
Sensor is welded to the flow chart on pipeline outer wall；Fig. 8 be pipeline provided by the embodiments of the present application by deformation when excitation coil
Acquire the flow chart of pipeline stress value；Fig. 9 is collector provided by the embodiments of the present application by collected axial stress and circumferential direction
Stress transfer to host computer flow chart；Figure 10 is the flow chart provided by the embodiments of the present application for calculating most this stress of rice plug.
Referring to Fig. 1, which includes at least five stress monitoring sensors 1, communication cable 2 and pipeline marker stake 3.
For example, in the embodiment of the present application, referring to fig. 2, which includes two welding substrates 11, two
12, two fixinig plates 13 of a end block, vibratory string 17, outer protection tube 18, spring 14 and fastening nut 15.
Outer protection tube 18 is sleeved on vibratory string 17, and fixed with vibratory string 17.For example, in the embodiment of the present application, vibratory string 17 can
For the metallic cord with certain length, outer protection tube 18 can be then metal tube, and length is slightly shorter than vibratory string 17, and outer protection tube 18 is set with
On vibratory string 17.
Vibration frequency of the metallic cord before and after deformation occurs is different, therefore, can be fixed on metallic cord on 4 outer wall of pipeline,
When deformation occurs for pipeline 4, so that metallic cord is synchronous, deformation occurs, and the vibration frequency for monitoring metallic cord can detect pipeline at this
The stress value that 4 deformation is subject to.
In a kind of implementation of the embodiment of the present application, identical material can be used, outer protection tube 18 and vibratory string 17 is made,
Outer protection tube 18 is sleeved on vibratory string 17, it is ensured that during monitoring 17 vibration frequency of vibratory string, avoid because of outer protection tube 18
Material difference make monitoring vibratory string 17 frequency inaccuracy, influence staff and judge the stress value that pipeline 4 is subject to.And
And outer protection tube 18 is set on vibratory string 17, it can also play the role of protecting vibratory string 17, avoid in monitoring 4 stress value of pipeline
In the process, vibratory string 17 is damaged and influences the frequency of monitoring.
Outer protection tube 18 and vibratory string 17 are fixed together, referring to fig. 2, the port at the both ends of outer protection tube 8 exposes one section respectively
Vibratory string 17 can fix by welding the port of outer protection tube 18 and vibratory string 17.So that in vibratory string 17 as pipeline 4 occurs
When deformation, outer protection tube 18 is moved synchronously with vibratory string 17, to guarantee the accuracy of the frequency of the vibratory string 17 monitored.
Referring to fig. 2, excitation coil 16 is removably mounted in outer protection tube 18.For example, in the embodiment of the present application, this swashs
Encouraging coil 16 can be electromagnetic coil, that is to say, that deactivate vibratory string 17 by voltage pulse and vibrate, and acquire vibratory string 17
Vibration frequency obtains the stress value that pipeline 4 is subject to according to frequency.Wherein, which is removably mounted on outer protection tube
On 18, facilitate the installation of excitation coil 16.
Referring to fig. 2, the both ends of vibratory string 17 are separately fixed in two end blocks 12, and two end blocks 12 are separately fixed at two welderings
It connects on substrate 11, two welding substrates 11 are separately fixed on two fixinig plates 13.
The both ends of vibratory string 17 are separately fixed in two end blocks 12, for example, in the embodiment of the present application, each end block 12 is
It is arranged fluted, which can be slightly larger than the circular groove of 18 outer diameter of outer protection tube for diameter, and the groove does not run through entire end
The length of block 12.The both ends of the outer protection tube 18 being fixed together and vibratory string 17 are located in the groove of two end blocks 12, are made
The both ends of vibratory string 17 are obtained up to the inner wall against groove, the outer wall of outer protection tube 18 and end block 12 can be consolidated by welding
It is fixed, so that vibratory string 17, outer protection tube 18 and two end blocks 12 are integrated.Certainly, the application is not limited to that, in this Shen
Other reasonable manners please can also be used outer protection tube 18 and end block 12 is fixed in other embodiments.
Referring to Fig. 3, each end block 12 is fixed on a welding substrate 11, and each welding substrate 11 is fixed on a fixation
On piece 13.For example, in the embodiment of the present application, which can be for one with reeded cuboid, and the groove can be circle
Cylindricality, each welding substrate 11 can also be cuboid, and the side of end block 12 and the side of welding substrate 11 are welded and fixed, weld
The opposite other side of substrate 11 can be arc, convenient to be bonded with the outer wall of pipeline 4.
Two fixinig plates 13 are fitted on the outer wall of pipeline 4 suitable for convertible curvature.For example, by each fixinig plate 13 with
Welding substrate 11 is welded and fixed, and fixinig plate 13 can convert curvature according to the outer wall of pipeline 4, to be fitted in the outer wall of pipeline 4
On.
In addition, referring to fig. 2, may be provided on each fixinig plate 13 it is multiple slot 131 is welded and fixed, welded by the fixinig plate 13
The position of fixinig plate 13 is determined when being connected on 4 outer wall of pipeline by the welding locating slot 131.The welding locating slot 131 can be for not
The groove penetrated, in this way, in the welding process, mash welder directly can be directed at the welding locating slot 131, electricity can be prevented in this way
Welding machine skids, and influences welding effect.
For example, in a kind of implementation of the embodiment of the present application, vibratory string 17, outer protection tube 8, end block 12, welding substrate 11
And the material of fixinig plate 13 can be both preferably metal, therefore, the fixed form between them can be both preferably the mode of welding.
Certainly, the application is not limited to that, in other implementations of the embodiment of the present application, can also use other reasonable materials
Material and fixed form.
Referring to fig. 2, in the embodiment of the present application, spring 14 is sleeved in outer protection tube 18, and is located at the one of excitation coil 16
Between the end block 12 of any of end and two end blocks 12, one end of spring 14 is fixedly connected with end block 12, the other end and fastening spiral shell
Mother 15 against.
For example, the length of excitation coil 16 is smaller than the distance between two end blocks 12, the both ends difference of excitation coil 16
There is a certain distance between two end blocks 12, is provided between any one end block 12 and excitation coil 16 and is sleeved on outer shield
Spring 14 on pipe 18.Wherein one end of spring 14 can be fixedly connected by welding with end block 12, the other end and fastening
Nut 15 against.
External screw thread is provided on the outer wall of outer protection tube 18, fastening nut 15 is connect by the external screw thread with outer protection tube 18.Example
Such as, in the embodiment of the present application, it is provided with external screw thread between the end block 12 and excitation coil 16 in two end blocks 12, fastened
Nut 15 passes through the thread set in outer protection tube 18, and is suitable for moving in outer protection tube 18.
Pass through the range of the mobile adjustable stress monitoring sensor 1 in position of the fastening nut 15 in outer protection tube 18
Initial value.For example, in a kind of implementation of the embodiment of the present application, 4 shape of pipeline which can monitor
The range for the stress value being subject to when change can be -1000 to 1000, wherein 0 to 1000 can indicate the stress being subject to when pipeline 4 stretches
Value, -1000 to 0 can indicate the stress value being subject to when pipeline 4 compresses.Certainly, the application is not limited to that, is implemented in the application
In other implementations of example, the range of the stress monitoring sensor 1 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 1 is subject to of the range of the sensor 1, and refer to pipeline 1
The direction for the stress being subject to, in other implementations of the embodiment of the present application, 0 to 1000 may also indicate that pipeline 4 compress when by
The stress value arrived, and -1000 to 0 can indicate the stress value being subject to when pipeline 4 stretches.
When the sensor 1 is in normal condition, i.e., when the initial value of the sensor 1 is located at 0, the compressive deformation that can monitor
The range of stress value and the range of tensile deformation stress value are equal and relatively short.Therefore, shape is stretched when the sensor 1 is in
When state, the range for the compressive deformation stress value that can be monitored is opposite to be expanded, and equally, the sensor 1 is made to be in compressive state in advance
When, 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 4 occurs becomes compression
In advance by fastening nut 15 towards close to the movement of the direction of nearest end block 12, that is to say, that pass through fastening nut 15 and squeeze bullet
Spring 14, spring 14 squeeze end block 12, and end block 12 drives outer protection tube 18 and 17 synchronizing moving of vibratory string, to stretch outer protection tube 18 and vibration
String 17.Monitor pipeline 4 generate compressive deformation when stress value when, the compression that the stress monitoring sensor 1 can monitor can be expanded
The range of the stress value of generation.
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 15 towards mobile close to the direction of excitation coil 16 when deformation occurs in road 4 to stretch, that is to say, that
Pull-off spring 14, spring 14 stretch end block 12, and end block 12 drives outer protection tube 18 and 17 synchronizing moving of vibratory string, to compress vibratory string 17
With outer protection tube 18.When monitoring the generation tensile deformation of pipeline 4, the stress value for the stretching generation that the sensor 1 can monitor can be expanded
Range.
In the embodiment of the present application, which can monitor the circumference stress of pipeline 4, be also suitable for monitoring
The axial stress of pipeline 4.
For example, with reference to Fig. 1, in a kind of implementation of the embodiment of the present application, pipeline meter Sai Si stress monitoring system
It may include five stress monitoring sensors 1, one of them stress monitoring sensor 1 is mounted on along the circumferential direction of pipeline 4
On the outer wall of pipeline 4, the stress in the circumferential direction suitable for monitoring pipeline 4.Remaining the four stress monitoring sensors 1 can be along axial direction
Direction is arranged in evenly and at intervals on the outer wall of pipeline 4, that is, is located at twelve-hour position, the three position, six of pipeline 4
O'clock position and nine o'clock position, the stress of the axial direction suitable for monitoring pipeline 4, to can guarantee that every two stress monitoring passes
Load between sensor 1 is consistent, prevents from making when 4 stress deformation of pipeline load between every two stress monitoring sensor 1 not
Stress value that is consistent and causing the stress monitoring sensor 1 to monitor is inaccurate.
Certainly, the application is not limited to that, in other implementations of the embodiment of the present application, can also be used more
Stress monitoring sensor 1 is in axial direction arranged in evenly and at intervals on the outer wall of pipeline 4, to monitor the axial direction side of pipeline 4
To stress, likewise, circumferentially more stress monitoring sensors 1 can also be arranged evenly and at intervals in direction.
Referring to Fig. 1, power supply unit 31, collector 32, communication module 33 and protection structure are provided in pipeline marker stake 3
34, collector 32 is suitable for acquiring the circumference stress value and axial tension stress of pipeline 4, and collected stress value is passed through communication mould
Block 33 is transmitted to host computer, and power supply unit 31 is suitable for collector 32 and communication module 33 is powered, and protection structure 34 is located at pipeline
The inside of 3 lower section of marker peg, is suitable for protection collector 32 and power supply unit 31.
For example, in the embodiment of the present application, which can be Five-channel collector, the corresponding stress in each channel
Sensor 1 is monitored, while acquiring the axial stress and circumference stress of the pipeline 4 of five stress monitoring sensors 1 monitoring.Alternatively,
Also the stress value that six channel collectors acquire each stress monitoring sensor 1 can be directly used.
Wherein, referring to Fig. 1, the both ends of communication cable 2 are connect with the excitation coil 16 of collector 32 and sensor 1 respectively,
To which each communication cable 2 is suitable for the collected corresponding stress at this of the excitation coil 16 of each stress monitoring sensor 1
By in corresponding channel transfer to the collector 32.
Referring to Fig. 1, which connect with communication module 33 and power supply unit 31 respectively, which will collect
This at pipeline axial stress and circumference stress be transmitted to communication module 33, thus the pipeline that the communication module 33 will receive
4 circumference stress and axial stress is uploaded to host computer, host computer by formula be calculated pipeline 4 at this most rice plug this
Stress, so that staff be facilitated to judge the safe condition of the pipeline 4 by the maximum yield limit with the tubing.
The collector 32 is connected with communication module 33, and communication module 33 will be received by general packet radio service technology
To stress data be uploaded to host computer (may be simply referred to as GPRS, belong to wireless transmission).In order to guarantee collector 32 and communication module
The transmission between connection and communication module 33 and host computer between 33, by power supply unit 31 to collector 32 and communication mould
Block 33 is powered.
For example, with reference to Fig. 1, in a kind of implementation of the embodiment of the present application, the lower part of pipeline marker stake 3 can be embedded in ground
Under, while may be provided with protection structure 34 in the inside of the lower part of the pipeline marker shape 3, it is suitable for 3 lower section of protective conduit mark shape
Internal collector 32 and power supply unit 31.
For example, with reference to Fig. 1, in a kind of implementation of the embodiment of the present application, which can be sleeved on power supply
Between unit 31 and collector 32 and the outer wall of pipeline marker stake 3, which can be divided into two parts, and top can be glass
Steel construction, lower part can be metal structure, and the glass fibre reinforced plastic structure and metal structure can be integrated, to be directly sleeved on power supply unit 31
Outside collector 32, metal structure has preferable strength and stiffness, so as to protect internal power supply unit 31 and acquisition
Device 32 prevents from being destroyed.
And protect and may be provided with a through-hole 341 at the top of the glass fibre reinforced plastic structure on the top of structure 34, thus the protection knot
The inner cavity of structure 34 is connected to cavity made of another glass reinforced plastic, and the electric wire for the communication structure 33 connecting with collector 32 passes through should
Through-hole 341, to be located in cavity made of the glass reinforced plastic.Glass reinforced plastic can be very good transmission signal, and communication structure 33 is put
Setting in the cavity made of the glass reinforced plastic can be connected between host computer, to guarantee the transmission of signal.
Certainly, the application is not limited to that, in other implementations of the embodiment of the present application, can also use other
The upper and lower part of the protection structure 34 is made in suitable material.
In addition, in a kind of implementation of the embodiment of the present application, which may also include the sun referring to Fig. 1
Energy solar panel 35, solar panel 35 may be provided at the top that pipeline marker stake 3 is located at ground, and connect with power supply unit 31
It connects, so as to be the power supply unit 31 power supply, and can be economized on resources using the solar panel of solar energy type.
Placing may also set up a through-hole above cavity made of the glass reinforced plastic of communication structure 33, so that it is single to be suitable for power supply
The electric wire of member 31 is passed through and is connect with the solar panel 35 at the top of the pipeline marker stake 3.
In a kind of implementation of the embodiment of the present application, which can be lithium electricity power supply unit, certainly, this Shen
It please be not limited to that, in other implementations of the embodiment of the present application, which can also be the confession of other forms
Electric unit.
Wherein, meter Sai Si stress, that is, Mises stress, the 4th intensity equivalent stress, most plastic materials pass through calculating
Mises stress carries out strength check, judges the safe condition of the pipeline.
The maximum Mises stress value of pipeline 4 is associated with the circumference stress value of the pipeline 4 and maximum axial stress value, directly
It connects and at least one stress monitoring sensor 1 is arranged along the circumferential direction of pipeline 4, can directly and accurately monitor the pipeline 4
Circumference stress guarantees the accuracy of the circumference stress of pipeline 4, and by least four stress monitoring sensors 1 along the axis of pipeline 4
To on the evenly spaced outer wall that pipeline 4 is set in direction, the load one between every two stress monitoring sensor 1 may make
It causes, to obtain accurate maximum axial stress value, and then obtains the accurate maximum Mises stress value of pipeline 4.
The embodiment of the present application also provides a kind of pipeline meter Sai Si stress monitoring methods, referring to fig. 4, this method comprises:
Step S1 monitors the stress value of pipeline 4 using stress monitoring sensor 1.
Wherein, referring to Fig. 5, in the embodiment of the present application, the step can include:
Step S11 adjusts the initial value of the range of stress monitoring sensor 1.
In the embodiment of the present application, the sensitivity of the stress monitoring sensor 1 monitoring 4 deformation of pipeline is higher, when pipeline 4
When deformation is larger, the stress to avoid monitoring 4 deformation of pipeline from being subject to is more than the range of the sensor 1, can be passed by stress monitoring
Before sensor 1 is installed on the outer wall of pipeline 4, first predict the deformation direction that hanging tube road 4 may occur, to adjust stress prison in advance
Survey the initial value of the range of sensor 1.
For example, with reference to Fig. 6, in the embodiment of the present application, step S11 can include:
Step S111, position of the mobile fastening nut 15 in outer protection tube 18, squeezes spring 14, to stretch vibratory string 17, from
And the initial value of the range for the stress that monitoring 4 compressive deformation of pipeline for adjusting stress monitoring sensor 1 is subject to, expand stress monitoring
The range for the stress being subject to when compressive deformation occurs for the pipeline 4 that sensor 1 monitors.
When the shape for predicting that pipeline 4 occurs becomes compression, it can adjust the position of fastening nut 15, squeeze spring 14, so that
Spring 14 squeezes end block 12, and two end blocks 12 are mobile towards the direction being relatively distant from, so that the vibratory string of the stress monitoring sensor 1
17 are in tensional state, to can adjust the initial value of the range of the monitoring compressive deformation stress of the sensor 1, can expand this
The range of the monitoring compressive deformation stress of stress monitoring sensor 1.
Step S112, position of the mobile fastening nut 15 in outer protection tube 18, pull-off spring 14, to compress vibratory string 17, from
And the range initial value for the stress that monitoring 4 tensile deformation of pipeline for adjusting stress monitoring sensor 1 is subject to, expand the stress monitoring
The range for the stress being subject to when tensile deformation occurs for the pipeline 4 that sensor 1 monitors.
When the shape for predicting that pipeline 4 occurs becomes stretching, the position of fastening nut 15, pull-off spring 4, so that bullet can adjust
Spring 14 stretches end block 12, and two end blocks 12 are mobile towards relatively close direction, so that the vibratory string 17 of the stress monitoring sensor 1
In compressive state, to can adjust the initial value of the range of the monitoring tensile deformation stress of the sensor 1, this can be expanded and answered
Power monitors the range of the monitoring tensile deformation stress of sensor 1.
Step S12, by least two stress monitoring sensors 1 along pipeline respectively along the circumferential direction of pipeline 4 and axial direction side
To being welded on the outer wall of pipeline 4.
Wherein, in a kind of implementation of the embodiment of the present application, referring to Fig. 7, step S12 can include:
Step S121, the axial direction by least one stress monitoring sensor 1 along pipeline 4 are installed, and the axis of pipeline 4 is monitored
To stress value.
For example, in the embodiment of the present application, that is to say, that by the axial direction one of the length direction of vibratory string 17 and pipeline 4
It causes, when deformation occurs for pipeline 4, the stress for the axial direction that monitoring pipeline 4 is subject to.
In a kind of implementation of the embodiment of the present application, referring to Fig. 1, the stress monitoring of the axial direction of pipeline 4 is monitored
Sensor 1 can be three, for monitoring the axial stress of 4 different location of same place pipeline, so that the monitoring of axial stress is more
Precisely.
It can along the step of axial direction installation of pipeline 4 by stress monitoring sensor 1 are as follows:
First fastening nut 15 and spring 14 are sleeved in outer protection tube 18, outer protection tube 18 is sleeved on vibratory string 17, and will
Both ends of the both ends of outer protection tube 18 respectively with vibratory string 17 are welded and fixed；
Then, the both ends of outer protection tube 18 are inserted into respectively in the groove of two end blocks 12, and by welding will be outer
Pillar 18 and end block 12 are fixed；
Two fixinig plates 13 are welded and fixed with two welding substrates 11 respectively, then according to the stress monitoring sensor 1
The stress direction of monitoring selects fixed-direction, for example, when monitoring the circumferential direction of pipeline 4, according between each end block 12 of chain
Distance, two fixinig plates 13 are welded on the outer wall of pipeline 4 along the circumferential direction of pipeline 4；
Subsequently two welding substrates 11 are welded and fixed with two end blocks 12 respectively；
Finally excitation coil 16 is installed in outer protection tube 18.
At least one stress monitoring sensor 1 is installed along the circumferential direction of pipeline 4, monitors the ring of pipeline 4 by step S122
To stress value.
For example, in a kind of implementation of the embodiment of the present application, referring to Fig. 1, the circumferential direction of monitoring pipeline 4 in the system
Stress monitoring sensor 1 can be one, the circumferential direction of the outer wall of the installation direction and pipeline 4 of the stress monitoring sensor 1
Unanimously, therefore, the circumference stress of pipeline 4 can relatively accurately be detected.
Certainly, in the embodiment of the present application, for the sequence of step S121 and step S122, the application is not limited in
This can also be first by least one stress monitoring sensor 1 along the ring of pipeline 4 in other implementations of the embodiment of the present application
It is installed to direction, then the other three stress monitoring sensor 1 is mounted on to the outer wall of the pipeline 4 along the axial direction of pipeline 4
On different location.
Step S13, when deformation occurs for pipeline 4, the excitation coil 16 of stress monitoring sensor 1 acquires the stress of pipeline 4
Value.
Wherein, referring to Fig. 8, in the embodiment of the present application, step S13 can include:
Step S131, when deformation occurs for pipeline 4, be welded between two fixinig plates 13 on the outer wall of pipeline 4 away from
From changing.
For example, in a kind of implementation of the embodiment of the present application, when compressive deformation occurs for pipeline 4, the outer diameter of pipeline 4
Have the tendency that diminution, since fixinig plate 13 is bonded and fixes with the outer wall of pipeline 4, meanwhile, two be welded on the outer wall of pipeline 4
The distance between a fixinig plate 13 also has the tendency that diminution.
When tensile deformation occurs for pipeline 4, i.e. the outer diameter of pipeline 4 has expansion trend, while being welded on the outer wall of pipeline 4
The distance between two fixinig plates 13 also have expansion trend.
Step S132, deformation occurs for two 13 synchronous drive vibratory strings 17 of fixinig plate.
For example, in the embodiment of the present application, referring to Fig. 3, fixinig plate 13 and welding substrate 11 are fixed, 11 top of welding substrate
Fixed with end block 12, end block 12 and one end of outer protection tube 18 and vibratory string 17 are fixed, that is to say, that fixinig plate 13, weld substrate 11,
End block 12 and one end of outer protection tube 18 and vibratory string 17 are fixed as one.Therefore, when fixinig plate 13 as position occurs for the deformation of pipeline 4
When shifting, vibratory string 17 also can deformation occurs therewith.
Step S133, excitation coil 16 motivates vibratory string 17 to vibrate, and acquires vibration frequency.
For example, corresponding deformation can also occur for the vibratory string 17 of the stress monitoring sensor 1 after deformation occurs for pipeline 4,
It is vibrated with the voltage pulse excitation vibratory string 17 of excitation coil 16, and acquires the vibration frequency of the vibratory string after deformation 17.
The circumference stress value of the pipeline 4 monitored and axial tension stress are transmitted to acquisition by communication cable 2 by step S2
Device 32.
For example, in the embodiment of the present application, the excitation coil 16 of each stress monitoring sensor 1 passes through a communication cable
2 connect with collector 32.The vibration frequency of collected vibratory string 17 is transmitted to collector by communication cable 2 by excitation coil 16
32 corresponding channels.
Collected axial tension stress and circumference stress value are transmitted to host computer by step S3, collector 32.
Wherein, in the embodiment of the present application, referring to Fig. 9, step S3 can include:
Collected axial tension stress and circumference stress value are transmitted to communication module 33 by step S31, collector 32.
The axial tension stress received and circumference stress value are uploaded to host computer by step S32, communication module 33.
Collector 32 and communication module 33 are arranged in pipeline marker stake 3 together, therefore can be first collected by collector 32
The circumference stress and axial stress that 4 deformation of pipeline is subject to are transmitted to communication module 33.Then, communication module 33 passes through wireless transmission
The stress that 4 deformation of pipeline received is subject to is uploaded to host computer.
Step S4, the circumference stress value and axial tension stress of the pipeline 4 that host computer receives calculate the maximum of the pipeline 4
Mises stress value.
For example, with reference to Figure 10, in a kind of implementation of the embodiment of the present application, step S4 can include:
Step S41 takes the section of pipeline 4, establishes cartesian coordinate system by origin of center location, obtains each along pipeline
The coordinate of 1 installation site of stress monitoring sensor of 4 axial directions setting；
For example, in a kind of implementation of the embodiment of the present application, along the axial direction array installation of pipeline 4, there are four answered
Power monitors sensor 1, that is, twelve-hour, three, six o'clock and the nine o'clock position on 4 outer wall of pipeline are respectively along axis
To one stress monitoring sensor 1 of installation, the circular section for installing the pipeline 4 of four stress monitoring sensors 1 is taken, with center of circle position
It sets and establishes cartesian coordinate system as origin, so that it is determined that the coordinate position of each stress monitoring sensor 1.
Step S42, there are the passes of following first formula between four stress monitoring sensors 1 being in axial direction arranged
System, the parameter of undetermined parameter is determined according to transverse and longitudinal coordinate, radius and the stress value of four 1 installation sites of stress monitoring sensor
Value:
Ax+by+cr+pz=1
Wherein, a, b, c, p are undetermined coefficient,
X is the abscissa of 1 installation site of stress monitoring sensor,
Y is the ordinate of 1 installation site of stress monitoring sensor,
R is the radius of 1 installation site of stress monitoring sensor,
Z is the stress value of stress monitoring sensor 1.
For example, on the same circular section, which is passed in a kind of implementation of the embodiment of the present application
There are following mathematical relationships between sensor 1:
Ax+by+cr+pz=1
Wherein, a, b, c, p are undetermined coefficient；
X is the abscissa of stress monitoring sensor mounting location；
Y is the ordinate of stress monitoring sensor mounting location；
R is the radius of stress monitoring sensor mounting location；
Z is the stress value of stress monitoring sensor.
By transverse and longitudinal coordinate, radius and the corresponding stress of the installation site of each axially mounted stress monitoring sensor 1
Value substitutes into above-mentioned first formula, lists four equations, four equations of simultaneous can solve tetra- undetermined coefficients of a, b, c, p
Coefficient value, to obtain the relationship between the transverse and longitudinal coordinate of stress monitoring sensor 1, radius and stress value.
Wherein, r is the corresponding radius of installation site of each stress monitoring sensor 1, can be measured by internal detector every
The radius of the installed position of a stress monitoring sensor 1.When pipeline 4 is standard round tube, four stress monitoring sensors 1 are pacified
The corresponding radius of holding position is equal.But in practical applications, the circular section of pipeline 4 may not be the circle of standard, at this time may be used
The corresponding radius value of each 1 installation site of stress monitoring sensor is measured by internal detector, to substitute into corresponding each side
In formula.
In addition, the stress value of four stress monitoring sensors 1 can be obtained directly by collector 31.
The coefficient value of determining undetermined coefficient is substituted into following second formula by step S43, and following second formula obtain maximum
Axial tension stress:
For example, being answered according to first formula of determining tetra- coefficient values of a, b, c, p by asking extreme value that maximum axial can be obtained
Force value.
Step S44 obtains most this stress of rice plug according to following third formula:
Wherein, E is elasticity modulus；
|εE| for the stress value of the stress monitoring sensor in circumferential direction.
For example, in a kind of implementation of the embodiment of the present application, it can be according to obtained maximum axial stress value and along ring
The stress value of the stress monitoring sensor 1 of shape direction setting, substitutes into third formula, to obtain most this stress value of rice plug.
Wherein, circumferentially the stress value of the stress monitoring sensor 1 of direction setting can also be obtained directly by collector 31.
In addition, in the embodiment of the present application, referring to fig. 4, this method may also include that
Step S5, host computer is obtained this at pipeline 4 maximum Mises stress value compared with yield limit, judgement should
Whether pipeline 4 is in a safe condition.
For example, in the application implementation, it, can be in the wrong with the tubing after host computer obtains the maximum Mises stress value of pipeline 4
It takes the limit to make comparisons, judges whether the pipeline 4 can bear deformation, that is, when by deformation, if is in a safe condition.
The foregoing is merely illustrated examples of the invention, the protection scope being not intended to limit the invention is all in this hair
Within bright spirit and principle, any modification, equivalent replacement, improvement and so on should be included in protection scope of the present invention
Within.
Claims (17)
1. a kind of pipeline meter Sai Si stress monitoring system, which is characterized in that including at least five stress monitoring sensors (1), lead to
Interrogate cable (2) and pipeline marker stake (3), wherein
Power supply unit (31), collector (32), communication module (33) and protection structure are provided in the pipeline marker stake (3)
(34), the collector (32) is suitable for acquiring the circumference stress value and axial tension stress of pipeline (4), and described answers collected
Force value is transmitted to host computer by the communication module (33), and said supply unit (31) is suitable for the collector (32) and institute
Communication module (33) power supply is stated, protection structure (34) is located at the inside below the pipeline marker stake (3), is suitable for protection institute
State collector (32) and said supply unit (31)；
The stress monitoring sensor (1) includes two welding substrates (11), two end blocks (12), two fixinig plates (13), vibration
String (17), outer protection tube (18), spring (14), fastening nut (15) and excitation coil (16), the outer protection tube (18) are sleeved on institute
It states on vibratory string (17), and fixed with the vibratory string (17), the excitation coil (16) is removably mounted on the outer protection tube
(18) on, the both ends of the vibratory string (17) are separately fixed in described two end blocks (12), and described two end blocks (12) are solid respectively
It is scheduled on described two welding substrates (11), described two welding substrates (11) are separately fixed at described two fixinig plates (13)
On, described two fixinig plates (13) are fitted on the outer wall of pipeline (4) suitable for convertible curvature, and the spring (14) is sleeved on
On the outer protection tube (18), it is located at any of one end and described two end blocks (12) of the excitation coil (16) end block (12)
Between, one end of the spring (14) is fixedly connected with the end block (12), and the other end and the fastening nut (15) are against institute
It states and external screw thread is set on the outer wall of outer protection tube (18), the fastening nut (15) is threadedly coupled with the outer protection tube (18)；
The outer wall of the pipeline (4) is in axial direction arranged in at least four stress monitoring sensors (1) evenly and at intervals
On, circumferentially direction is arranged on the outer wall of the pipeline (4) at least one described stress monitoring sensor (1)；
The both ends of the communication cable (2) are connect with the excitation coil (16) and the collector (32) respectively, are suitable for institute
The stress for stating stress monitoring sensor (1) monitoring uploads on the collector (32) of the pipeline marker stake (3).
2. pipeline meter Sai Si stress monitoring system according to claim 1, which is characterized in that set on the fixinig plate (13)
It is equipped with welding locating slot (131), is positioned when the fixinig plate (13) to be welded on the outer wall of pipeline (4) by the welding
Slot (131) determines the position of the fixinig plate (13).
3. pipeline meter Sai Si stress monitoring system according to claim 1, which is characterized in that in described two end blocks (12)
Any one end block (12) be provided with groove, the both ends of the outer protection tube (18) are located at the recessed of described two end blocks (12)
In slot.
4. pipeline meter Sai Si stress monitoring system according to claim 1, which is characterized in that at least two stress prison
The stress monitoring sensor (1) surveyed in sensor (1) is mounted on the outer of pipeline (4) along the axial direction of pipeline (4)
On wall, it is suitable for monitoring the stress of the axial direction of pipeline (4)；Another described stress monitoring sensor (1) is along pipeline (4)
Circumferential direction is mounted on pipeline outer wall, is suitable for monitoring the stress in pipeline (4) circumferential direction.
5. pipeline meter Sai Si stress monitoring system according to claim 1, which is characterized in that the excitation coil (16)
Length is less than the distance between described two end blocks (12).
6. the monitoring system of pipeline meter Sai Si stress according to claim 1, which is characterized in that the excitation coil (16)
Suitable for motivating the vibratory string (17) to vibrate, and the frequency for acquiring the vibratory string (17) is transmitted by the communication cable (33)
To the collector (32).
7. the monitoring system of pipeline meter Sai Si stress according to claim 1, which is characterized in that the pipeline marker stake
It (3) further include solar panel (35), the solar panel (35) is located at the top of the pipeline marker stake (3), fits
It powers in for said supply unit (31), the outer wall of the pipeline marker stake (3) is glass fibre reinforced plastic structure, the protection structure (34)
It is sleeved between said supply unit (31) and the collector (32) and the outer wall of the pipeline marker stake (3).
8. the detection system of pipeline meter Sai Si stress according to claim 7, which is characterized in that the protection structure (34)
Top be glass fibre reinforced plastic structure, lower part is metal structure, and said supply unit (31) and the collector (32) are located at the guarantor
The inner cavity of protection structure (34), and through-hole (341) are provided at the top of the protection structure (34), it is suitable for said supply unit (31)
Electric wire is passed through and is connect with the solar panel (35) and the electric wire of the communication module (33) passes through.
9. the detection system of pipeline meter Sai Si stress according to claim 8, which is characterized in that the protection structure (34)
Through-hole (341) on be provided with nut, be suitable for the electric wire of fixed said supply unit (31) and the communication module (33).
10. a kind of pipeline meter Sai Si stress monitoring method, which is characterized in that use pipe of any of claims 1-9
Dao meter Sai Si stress monitoring system, which comprises
The stress value of the pipeline (4) is monitored using the stress monitoring sensor (1)；
The circumference stress value of the pipeline (4) monitored and axial tension stress are transferred to institute by the communication cable (33)
State collector (32)；
The collected axial tension stress and the circumference stress value are transferred to host computer by the collector (32)；
The host computer is according to the circumference stress value of the pipeline (4) received and axial tension stress calculating
This stress value of the most rice plug of pipeline (4).
11. pipeline meter Sai Si stress monitoring method according to claim 10, which is characterized in that described to utilize the stress
Monitor the stress value that sensor (1) monitors the pipeline (4), further includes:
Adjust the initial value of the range of the stress monitoring sensor (1)；
At least five stress monitorings sensor (1) is welded to institute along the circumferential direction and axial direction of the pipeline (4) respectively
On the outer wall for stating pipeline (4)；
When the pipeline (4) is by deformation, the excitation coil (16) of the stress monitoring sensor (1) motivates vibratory string
(17) it vibrates and acquires the stress that the pipeline (4) deformation is subject to.
12. pipeline meter Sai Si stress monitoring method according to claim 11, which is characterized in that described by described at least five
A stress monitoring sensor (1) is welded to the outer wall of the pipeline (4) along the circumferential direction and axial direction of the pipeline (4) respectively
On, comprising:
Axial direction by at least four stress monitoring sensors (1) along the pipeline (4) is installed, to monitor the pipeline
(4) axial tension stress；
At least one described stress monitoring sensor (1) is installed along the circumferential direction of the pipeline (4), to monitor the pipeline
(4) circumference stress value.
13. pipeline meter Sai Si stress monitoring method according to claim 11, which is characterized in that the adjustment stress
Monitor the initial value of the range of sensor (1), comprising:
Position of the mobile fastening nut (15) on the outer protection tube (18), squeezes the spring (14), described in stretching
Vibratory string (17), so as to adjust the amount of stress that is subject to of the monitoring pipeline (4) compressive deformation of the stress monitoring sensor (1)
The stress being subject to when compressive deformation occurs for journey initial value, the pipeline (4) for expanding stress monitoring sensor (1) monitoring
Range；
Position of the mobile fastening nut (15) on the outer protection tube (18), loosens the spring (14), described in compression
Vibratory string (17), so as to adjust the amount of stress that is subject to of the monitoring pipeline (4) tensile deformation of the stress monitoring sensor (1)
The stress being subject to when tensile deformation occurs for journey initial value, the pipeline (4) for expanding stress monitoring sensor (1) monitoring
Range.
14. pipeline meter Sai Si stress monitoring method according to claim 11, which is characterized in that described to work as the pipeline
(4) by deformation when, the excitation coil (16) of the stress monitoring sensor (1) acquires the stress value of the pipeline (4),
Include:
When deformation occurs for the pipeline (4), between two be welded on the outer wall of the pipeline (4) the fixinig plate (13)
Distance change；
Deformation occurs for vibratory string (17) described in two fixinig plate (13) synchronous drives；
The excitation coil (16) motivates the vibratory string (17) to vibrate, and acquires vibration frequency.
15. pipeline meter Sai Si stress monitoring method according to claim 10, which is characterized in that the collector (32) will
The collected axial tension stress and the circumference stress value are transferred to host computer, comprising:
The collected axial tension stress and the circumference stress value are transferred to the communication module by the collector (32)
(33)；
The axial tension stress received and the circumference stress value are uploaded to the host computer by the communication module (33).
16. according to the pipeline meter Sai Si stress monitoring method described in any one of claim 10, which is characterized in that the host computer root
According to the circumference stress value and the axial tension stress of the pipeline (4) received calculate the pipeline most rice plug this
Stress value, comprising:
The section for taking the pipeline (4) is established cartesian coordinate system by origin of center location, is obtained each along the pipeline
(4) coordinate of stress monitoring sensor (1) installation site of axial direction setting；
There are the relationship of following first formula between the described four stress monitoring sensors (1) being in axial direction arranged, according to
Transverse and longitudinal coordinate, radius and the stress value of four stress monitoring sensors (1) installation site determine the parameter value of undetermined parameter:
Ax+by+cr+pz=1
Wherein, a, b, c, p are the undetermined coefficient,
X is the abscissa of stress monitoring sensor (1) installation site,
Y is the ordinate of stress monitoring sensor (1) installation site,
R is the radius of stress monitoring sensor (1) installation site,
Z is the stress value of the stress monitoring sensor (1)；
The parameter value of the determining undetermined parameter is substituted into following second formula, obtains maximum axial stress value:
By the maximum axial stress value and circumferentially direction setting the stress monitoring sensor (1) stress value substitute under
It states third formula and obtains described most this stress of rice plug:
Wherein, E is elasticity modulus；
|εE| for the stress value of the stress monitoring sensor (1) in circumferential direction.
17. pipeline meter Sai Si stress monitoring method according to claim 10, which is characterized in that the method also includes:
This stress of the most rice plug for the pipeline (4) that the host computer is obtained judges the pipeline compared with yield limit
(4) whether in a safe condition.
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| CN201910012189.9A CN109781324A (en) | 2019-01-07 | 2019-01-07 | Pipeline meter Sai Si stress monitoring system and method |
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| CN111022933A (en) * | 2019-12-31 | 2020-04-17 | 西南交通大学 | In-service pipeline girth weld defect monitoring system |
| CN111238699A (en) * | 2019-12-13 | 2020-06-05 | 中国石油化工股份有限公司 | Deformed pipeline stress test determination method |
| CN113405648A (en) * | 2021-06-23 | 2021-09-17 | 常州工学院 | Variable stress type vibration sensor |
| CN113865761A (en) * | 2021-09-26 | 2021-12-31 | 西南石油大学 | Stress evaluation method for long-distance buried pipeline |
| WO2023137969A1 (en) * | 2022-01-18 | 2023-07-27 | 临海伟星新型建材有限公司 | Structural design and verification method for metal withholding pipe fitting of oil field pipe |
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