CN104792258A - Gas-insulated metal-enclosed power transmission line monitoring method and device - Google Patents
Gas-insulated metal-enclosed power transmission line monitoring method and device Download PDFInfo
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- CN104792258A CN104792258A CN201510197058.4A CN201510197058A CN104792258A CN 104792258 A CN104792258 A CN 104792258A CN 201510197058 A CN201510197058 A CN 201510197058A CN 104792258 A CN104792258 A CN 104792258A
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Abstract
Disclosed is a gas-insulated metal-enclosed power transmission line monitoring method and device. The gas-insulated metal-enclosed power transmission line monitoring method includes steps of A fixing strain sensors in at least one position of the upper portion of a pipeline housing of a gas-insulated metal-enclosed power transmission line; B, measuring thermal strain of pipelines in at least one position by the strain sensors, and selecting the maximum thermal strain variable as thermal strain of the gas-insulated metal-enclosed power transmission line. The gas-insulated metal-enclosed power transmission line monitoring method and device has high accuracy and plays an important role in popularizing online monitoring technology of thermal contraction feature of the gas-insulated metal-enclosed power transmission line and guaranteeing safe and reliable operation of the gas-insulated metal-enclosed power transmission line.
Description
Technical field
The present invention relates to power transmission device technical field, particularly relate to the on-line monitoring technique of power transmission device.
Background technology
Gas-insulated metal closed power transmission line (Gas Insulated Metal Enclosed TransmissionLine is called for short GIL) is with SF
6gas or SF
6and N
2mixed gas is as insulating medium, gas-insulated metal closed power transmission line pipeline configuration adopts shell and conductor coaxial to arrange, have that transmission line capability is large, loss is low, take up an area less, reliability is high, non-maintaining, the life-span long, advantages of environment protection, at home and abroad obtain in electric system and apply more and more widely.But while gas-insulated metal closed power transmission line pipeline possesses above-mentioned advantage, its sealing is tight, electric current is large, lay structure and the features such as section complexity, also causes gas-insulated metal closed power transmission line power transmission line thermal expansion problem to become increasingly conspicuous.When especially laying the exceptional operating conditions such as section awful weather or appearance " short-time overload ", gas-insulated metal closed power transmission line pipeline thermal stroke is excessive, this may cause electrical equipment fatigue breakdown even transmission line of electricity to arch upward destruction, so that cause major accident, the safe and stable operation of harm electric system.
At present for gas-insulated metal closed power transmission line pipeline thermal telescoping problem, scene mainly absorbs gas-insulated metal closed power transmission line pipeline thermal stroke by the mode of design and installation telescopic joint.Telescopic joint also can be described as pipeline expansion joint, expansion joint, compensator, expansion bend etc.Telescopic joint is divided into: several large types such as bellow-type expansion joint, slip expansion joint, square natural compensation telescopic joint, and telescopic joint is mainly used in the dilatation that compensation pipeline produces because of temperature variation.But lack corresponding gas-insulated metal closed power transmission line method and technique in prior art, this brings inconvenience and potential safety hazard to the traffic control of gas-insulated metal closed power transmission line pipeline: first, the thermal expansion situation of change of gas-insulated metal closed power transmission line pipeline can not be understood effectively, reliable reference frame can not be provided for dispatching of power netwoks during special ruuning situations such as such as " short-time overloads "; Secondly, accurately cannot understand electrical equipment Cyclic fatigue failure situation, cannot use for reference for the optimization of gas-insulated metal closed power transmission line Cemented filling capacity provides to instruct, therefore cause waste and potential safety hazard.
Summary of the invention
Given this, the object of the invention is to overcome in prior art the shortcoming lacking gas-insulated metal closed power transmission line monitoring method, propose a kind of method and device of gas-insulated metal closed power transmission line pipeline thermal emergent property on-line monitoring.The method and device make full use of the ultimate principle of thermal conduction study and structural mechanics, select most suitable thermal strain measuring position on shell, simultaneously by determining suitable strain transducer, strain transducer mounting means, measuring method and signal transacting instrument, realize the accurate on-line monitoring to the thermal strain of gas-insulated metal closed power transmission line conduit enclosure.
In order to realize this object, the technical scheme that the present invention takes is as follows.
A kind of gas-insulated metal closed power transmission line monitoring method, said method comprising the steps of:
A, fix strain transducer in position, more than one, gas-insulated metal closed power transmission line conduit enclosure top;
B, measured the thermal strain amount of described more than one position pipeline by strain transducer, select wherein maximum heat dependent variable as gas-insulated metal closed power transmission line thermal strain amount.
Wherein saidly fix strain transducer in position, more than one, gas-insulated metal closed power transmission line conduit enclosure top and comprise:
A1, fix the first strain transducer in described more than one position;
A2, near the first strain transducer, smear unimolecule silica gel, the second strain transducer is installed on unimolecule silica gel place;
A3, the first strain transducer and the second strain transducer are connected to strainmeter by the half-bridge road mode of connection;
Correspondingly, in step B, calibrated by the strain of the second strain transducer, the measuring error that the own temperature eliminating the first strain transducer brings, obtain the thermal strain amount of described more than one position pipeline.
More than one position, described gas-insulated metal closed power transmission line conduit enclosure top comprises: the position of gas-insulated metal closed power transmission line conduit enclosure both upper ends thereof and zone line.
Wherein said after strain transducer is fixed in position, more than one, gas-insulated metal closed power transmission line conduit enclosure top, comprise further:
Around described strain transducer, smear unimolecule silica gel, prevent strain transducer to be subject to moisture effect.
A kind of gas-insulated metal closed power transmission line monitoring device, described device comprises strain transducer and strainmeter, wherein,
Strain transducer is fixed in position, more than one, gas-insulated metal closed power transmission line conduit enclosure top, measures the thermal strain amount of described more than one position;
Strainmeter is connected to described more than one position strain transducer, obtains the thermal strain amount of described more than one position pipeline, selects wherein maximum thermal strain amount as gas-insulated metal closed power transmission line thermal strain amount.
The strain transducer of more than one position, described gas-insulated metal closed power transmission line conduit enclosure top comprises the first strain transducer and the second strain transducer, wherein,
First strain transducer is fixed in position, more than one, gas-insulated metal closed power transmission line conduit enclosure top;
Near the first strain transducer, be coated with unimolecule silica gel, the second strain transducer is installed on described unimolecule silica gel place;
First strain transducer and the second strain transducer are connected to strainmeter by the half-bridge road mode of connection.
More than one position, wherein said gas-insulated metal closed power transmission line conduit enclosure top comprises: the position of gas-insulated metal closed power transmission line conduit enclosure both upper ends thereof and zone line.
Wherein, described strain transducer adopts three-dimensional single-ended resistive formula strain transducer.
Especially, described strainmeter is statical strain indicator.
In addition, around described strain transducer, be coated with unimolecule silica gel, prevent strain transducer to be subject to moisture effect.
By adopting gas-insulated metal closed power transmission line monitoring method of the present invention and device, following Advantageous Effects can be obtained.
Method and device are easy to realize, economical and practical, effectively can realize the on-line monitoring of gas-insulated metal closed power transmission line pipeline thermal emergent property.Adopt the gas-insulated metal-enclosed power transmission line conduit enclosure thermal strain measured by this method to have very high accuracy, the gas-insulated metal-enclosed power transmission line pipeline thermal expansion performance on-line monitoring technique of popularization and the gas-insulated metal-enclosed power transmission line pipe safety reliability service of guarantee are significant.
Accompanying drawing explanation
Fig. 1 is the connection diagram of gas-insulated metal closed power transmission line monitoring device in the specific embodiment of the invention.
Fig. 2 is gas-insulated metal closed power transmission line conduit enclosure Temperature Field Simulation result schematic diagram.
Fig. 3 is the schematic diagram of gas-insulated metal closed power transmission line conduit enclosure temperature temporal variations process.
Fig. 4 is gas-insulated metal closed power transmission line conduit enclosure thermal strain temporal variations process in the specific embodiment of the invention.
Fig. 5 is environment temperature 24 hours change procedures in the specific embodiment of the invention.
Fig. 6 be in the specific embodiment of the invention thermal strain of gas-insulated metal closed power transmission line conduit enclosure with environment temperature 24 hours change procedures.
Embodiment
Below in conjunction with accompanying drawing, the present invention is elaborated.
The example embodiment that following discloses are detailed.But concrete structure disclosed herein and function detail are only the objects for describing example embodiment.
But should be appreciated that, the present invention is not limited to disclosed concrete example embodiment, but covers all modifications, equivalent and the alternative that fall within the scope of the disclosure.In the description to whole accompanying drawing, identical Reference numeral represents identical element.
Should be appreciated that, term "and/or" as used in this comprises one or morely relevant lists any of item and all combinations simultaneously.Should be appreciated that in addition, when parts or unit are called as " connection " or " coupling " to another parts or unit, it can be directly connected or coupled to miscellaneous part or unit, or also can there is intermediate member or unit.In addition, other words being used for describing relation between parts or unit should be understood according to identical mode (such as, " between " to " directly ", " adjacent " to " direct neighbor " etc.).
As shown in Figure 1, disclose a kind of gas-insulated metal closed power transmission line monitoring device in the specific embodiment of the invention, described device comprises strain transducer and strainmeter, wherein,
Strain transducer is fixed in position, more than one, gas-insulated metal closed power transmission line conduit enclosure top, measures the thermal strain amount of described more than one position;
Strainmeter is connected to the strain transducer of described more than one position, obtains the thermal strain amount of described more than one position pipeline, selects wherein maximum thermal strain amount as gas-insulated metal closed power transmission line thermal strain amount.
Fig. 2 is gas-insulated metal closed power transmission line conduit enclosure Temperature Field Simulation result schematic diagram.As shown in Figure 2, the heat of gas-insulated metal closed power transmission line pipe interior conductor is outwards distributed by the form of conduction, convection current and radiation.Gas-insulated metal closed power transmission line pipe interior gas is under the effect of heat buoyancy, gaseous exchange is obvious, make gas-insulated metal closed power transmission line conduit enclosure temperature distributing disproportionation even, specifically gas-insulated metal closed power transmission line conduit enclosure temperature is in the distribution of " upper height bends down ".The ultimate principle of elastic properties of materials mechanics in integrated structure mechanics, gas-insulated metal closed power transmission line conduit enclosure is the most seriously located to thermal strain for enclosure axis directly over cross section.Because the thermal strain of gas-insulated metal closed power transmission line conduit enclosure has axial symmetry, be again without loss of generality simultaneously, thus in the present invention's embodiment, more than one position, described gas-insulated metal closed power transmission line conduit enclosure top of installing strain transducer comprises: the position of gas-insulated metal closed power transmission line conduit enclosure both upper ends thereof and zone line.Therefore, in embodiment of the present invention, gas-insulated metal closed power transmission line conduit enclosure test point is conduit enclosure both upper ends thereof and zone line totally 3 positions, because the temperature of gas-insulated metal closed power transmission line conduit enclosure difference is slightly different, and gas-insulated metal closed power transmission line pipeline thermal expansion performance generally considers the most serious operating mode, therefore measurement result gets the maximal value in the dependent variable measurement data of three positions.
In the specific embodiment of the invention, strain transducer can adopt resistance strain.Resistance strain belongs to contact strain measurement element, three-dimensional (axially, radial, the tangential) strain measurement to testee can be realized, and do not destroy testee self structure and thermal equilibrium state thereof, arrange by strainmeter and can carry out continuous automatic measurement writing time simultaneously, realize the on-line monitoring of testee thermal strain.At present, resistance strain is applied widely in the such as strain measurement such as bridge, heat distribution pipeline field, has very high measuring accuracy in actual applications.
Generally, gas-insulated metal closed power transmission line conduit enclosure thermal expansion change is also not obvious, and thermal expansion numerical value is less, therefore needs strain transducer to have very high precision.In an embodiment, select three-dimensional single-ended resistive formula strain transducer as strain transducer, such as model is the three-dimensional single-ended resistive formula strain transducer of JSG120-3.This strain transducer measurement result is not substantially by electric field, magnetic interference.Can reach 0.001mm through this strain transducer precision calibrated, operating temperature range is-30 DEG C--80 DEG C.In addition, in the specific embodiment of the invention adopt three-dimensional single-ended resistive formula strain transducer cost low, it is convenient to buy, quick for installation, durable in use.
In order to obtain the strain conditions of gas-insulated metal closed power transmission line conduit enclosure, needing strain transducer to fix on the housing, in the present invention's embodiment, adopting the powerful quick-drying gelatin realization of 502 moments fixing.This glue effect is firm, is not afraid of and exposes to the weather, durable in use.During use at room temperature by described quick-drying gelatin even application in strain transducer and gas-insulated metal closed power transmission line conduit enclosure junction, guaranteeing in strain transducer and gas-insulated metal closed power transmission line conduit enclosure good contact situation, keep about about 1 minute, then room temperature placement half an hour, makes glue curing.In addition, for preventing strain transducer from making moist, around strain transducer, evenly coating unimolecule silica gel, the installation of strain transducer can be completed.
Due to strain transducer and described shell close contact, therefore be also easily subject to the impact of temperature and cause the thermal strain effect of strain transducer self, in order to eliminate the thermal strain effect of strain transducer self, in the present invention's embodiment, adopt a measuring position that the method for two strain transducers is set, realize the counteracting of the thermal strain of strain transducer self, concrete mode is: the strain transducer of more than one position, described gas-insulated metal closed power transmission line conduit enclosure top comprises the first strain transducer and the second strain transducer, wherein, first strain transducer is fixed in position, more than one, gas-insulated metal closed power transmission line conduit enclosure top, near the first strain transducer, be coated with unimolecule silica gel, the second strain transducer is installed on unimolecule silica gel place, between the second strain transducer and gas-insulated metal closed power transmission line conduit enclosure and onrelevant, first strain transducer and the second strain transducer are connected to strainmeter by the half-bridge road mode of connection.
Because the second strain transducer has identical temperature with the first strain transducer, therefore by it and the first strain transducer is connected to strainmeter with the half-bridge road mode of connection time, can balance out the first strain transducer because own temperature change the strain caused.
In another embodiment of the present invention, the strainmeter that measurement thermal strain amount uses is statical strain indicator, such as model is the statical strain indicator of YSV8316, the strain testing of the strainmeter of this kind is stablized, antijamming capability is strong, also can hand input-data acquisition time, Automatic continuous survey record data, realize the on-line monitoring of gas-insulated metal closed power transmission line pipeline thermal expansion performance.Meanwhile, by its corresponding system software, real-time display measurement numerical value, and the related datas such as automatic calculated stress.
Corresponding with gas-insulated metal closed power transmission line monitoring device of the present invention, also disclose a kind of gas-insulated metal closed power transmission line monitoring method in the specific embodiment of the invention, said method comprising the steps of:
A, fix strain transducer in position, more than one, gas-insulated metal closed power transmission line conduit enclosure top;
B, measured the thermal strain amount of described more than one position pipeline by strain transducer, select wherein maximum heat dependent variable as gas-insulated metal closed power transmission line thermal strain amount.
Wherein, describedly fix strain transducer in position, more than one, gas-insulated metal closed power transmission line conduit enclosure top and be:
A1, fix the first strain transducer in described more than one position;
A2, near the first strain transducer, smear unimolecule silica gel, the second strain transducer is installed on unimolecule silica gel place;
A3, the first strain transducer and the second strain transducer are connected to strainmeter by the half-bridge road mode of connection;
Correspondingly, in step B, calibrated by the strain of the second strain transducer, the measuring error that the own temperature eliminating the first strain transducer brings, obtain the thermal strain amount of described more than one position pipeline.
In addition, more than one position, described gas-insulated metal closed power transmission line conduit enclosure top comprises: the position on gas-insulated metal closed power transmission line conduit enclosure two ends and zone line top.
In addition, described after strain transducer is fixed in position, more than one, gas-insulated metal closed power transmission line conduit enclosure top, comprise further:
Around described strain transducer, smear unimolecule silica gel, prevent strain transducer to be subject to moisture effect.
With specific embodiment more, the beneficial effect of gas-insulated metal closed power transmission line monitoring method of the present invention and device is described below.Examples measure data are divided into three groups: first group to be gas-insulated metal closed power transmission line conduit enclosure thermal strain steady state measurement data under different load, as shown in the table; Second group is gas-insulated metal closed power transmission line conduit enclosure thermal strain transient measuring data under 2kA nominal load, experiment obtains nearly 400 groups of data, within in experiment every 1 second, gather 2 groups of data, gas-insulated metal closed power transmission line conduit enclosure temperature and thermal strain temporal variations process are as shown in Figure 3 and Figure 4; 3rd group is that the thermal strain of gas-insulated metal closed power transmission line conduit enclosure is with environment temperature 24 hours change procedures under 2kA nominal load, and environment temperature and gas-insulated metal closed power transmission line conduit enclosure thermal strain 24 hours change procedures are as shown in Figure 5 and Figure 6.
| Through-flow (kA) | Measured value (10 -6) | Theoretical value (10 -6) | Relative error (%) |
| 1 | 78.6 | 81.9 | 4.03 |
| 1.5 | 157.4 | 163.3 | 3.61 |
| 2 | 262.9 | 274.9 | 4.37 |
| 2.4 | 358.7 | 370.2 | 3.11 |
As can be seen from the comparative result of upper table and Fig. 4, adopt the experimental data of gas-insulated metal closed power transmission line monitoring method of the present invention and device and gross data closely, relative error, within 5%, can reach the accuracy requirement of general operating mode to gas-insulated metal closed power transmission line conduit enclosure thermal strain on-line measurement.Contrasted as can be seen from the observation of Fig. 5 and Fig. 6, the long-time continuous that gas-insulated metal closed power transmission line monitoring method of the present invention and device can carry out the thermal strain of gas-insulated metal closed power transmission line conduit enclosure is measured, and namely realizes the on-line monitoring of gas-insulated metal closed power transmission line pipeline thermal expansion performance.
Therefore, adopt gas-insulated metal closed power transmission line monitoring method of the present invention and the gas-insulated metal closed power transmission line conduit enclosure thermal strain measured by device to have very high accuracy, popularization gas-insulated metal closed power transmission line conduit enclosure thermal expansion characteristic on-line monitoring technique and raising electric equipment operation safe reliability are significant.
It should be noted that; above-mentioned embodiment is only the present invention's preferably embodiment; can not limiting the scope of the invention be understood as, not depart under concept thereof of the present invention, all protection scope of the present invention is belonged to modification to any subtle change that the present invention does.
Claims (10)
1. a gas-insulated metal closed power transmission line monitoring method, said method comprising the steps of:
A, fix strain transducer in position, more than one, gas-insulated metal closed power transmission line conduit enclosure top;
B, measured the thermal strain amount of described more than one position pipeline by strain transducer, select wherein maximum heat dependent variable as gas-insulated metal closed power transmission line thermal strain amount.
2. according to the gas-insulated metal closed power transmission line monitoring method described in claim 1, it is characterized in that, describedly fix strain transducer in position, more than one, gas-insulated metal closed power transmission line conduit enclosure top and comprise:
A1, fix the first strain transducer in described more than one position;
A2, near the first strain transducer, smear unimolecule silica gel, the second strain transducer is installed on unimolecule silica gel place;
A3, the first strain transducer and the second strain transducer are connected to strainmeter by the half-bridge road mode of connection;
Correspondingly, in step B, calibrated by the strain of the second strain transducer, the measuring error that the own temperature eliminating the first strain transducer brings, obtain the thermal strain amount of described more than one position pipeline.
3. according to the gas-insulated metal closed power transmission line monitoring method described in claim 1, it is characterized in that, more than one position, described gas-insulated metal closed power transmission line conduit enclosure top comprises: the position of gas-insulated metal closed power transmission line conduit enclosure both upper ends thereof and zone line.
4., according to the gas-insulated metal closed power transmission line monitoring method described in claim 1, it is characterized in that, described after strain transducer is fixed in position, more than one, gas-insulated metal closed power transmission line conduit enclosure top, comprise further:
Around described strain transducer, smear unimolecule silica gel, prevent strain transducer to be subject to moisture effect.
5. a gas-insulated metal closed power transmission line monitoring device, described device comprises strain transducer and strainmeter, wherein,
Strain transducer is fixed in position, more than one, gas-insulated metal closed power transmission line conduit enclosure top, measures the thermal strain amount of described more than one position;
Strainmeter is connected to described more than one position strain transducer, obtains the thermal strain amount of described more than one position pipeline, selects wherein maximum thermal strain amount as gas-insulated metal closed power transmission line thermal strain amount.
6. according to the gas-insulated metal closed power transmission line monitoring device described in claim 5, it is characterized in that, the strain transducer of more than one position, described gas-insulated metal closed power transmission line conduit enclosure top comprises the first strain transducer and the second strain transducer, wherein
First strain transducer is fixed in position, more than one, gas-insulated metal closed power transmission line conduit enclosure top;
Near the first strain transducer, be coated with unimolecule silica gel, the second strain transducer is installed on described unimolecule silica gel place;
First strain transducer and the second strain transducer are connected to strainmeter by the half-bridge road mode of connection.
7. according to the gas-insulated metal closed power transmission line monitoring device described in claim 5, it is characterized in that, more than one position, described gas-insulated metal closed power transmission line conduit enclosure top comprises: the position of gas-insulated metal closed power transmission line conduit enclosure both upper ends thereof and zone line.
8. according to the gas-insulated metal closed power transmission line monitoring device described in claim 5, it is characterized in that, described strain transducer adopts three-dimensional single-ended resistive formula strain transducer.
9. according to the gas-insulated metal closed power transmission line monitoring device described in claim 5, it is characterized in that, described strainmeter is statical strain indicator.
10. according to the gas-insulated metal closed power transmission line monitoring device described in claim 5, it is characterized in that, around described strain transducer, be coated with unimolecule silica gel, prevent strain transducer to be subject to moisture effect.
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| CN201510197058.4A CN104792258A (en) | 2015-04-23 | 2015-04-23 | Gas-insulated metal-enclosed power transmission line monitoring method and device |
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| CN201510197058.4A CN104792258A (en) | 2015-04-23 | 2015-04-23 | Gas-insulated metal-enclosed power transmission line monitoring method and device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108038268A (en) * | 2017-11-18 | 2018-05-15 | 西安交通大学 | GIL running temperature appraisal procedures in a kind of corridor pipe |
| CN110967133A (en) * | 2018-09-29 | 2020-04-07 | 平高集团有限公司 | GIL mechanical property testing device and GIL mechanical property testing system |
| CN114877856A (en) * | 2022-07-13 | 2022-08-09 | 广东电网有限责任公司佛山供电局 | Method, system and equipment for monitoring morphology of GIL pipeline |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0961106A (en) * | 1995-08-30 | 1997-03-07 | Ishikawajima Harima Heavy Ind Co Ltd | Method for predicting temperature characteristic of strain gauge |
| WO2003058160A1 (en) * | 2002-01-13 | 2003-07-17 | Zbigniew Drazek | Method for measuring the pipeline creeping |
| CN102162778A (en) * | 2010-12-22 | 2011-08-24 | 天津大学 | Multiple-spindle ratchet wheel strain testing system and method of pipe bend |
| CN102175136A (en) * | 2010-12-22 | 2011-09-07 | 天津大学 | Straight tube multi-axis ratchet wheel strain testing system and method |
| CN202281664U (en) * | 2011-10-19 | 2012-06-20 | 广东美的电器股份有限公司 | Stress-strain measuring device for air conditioner pipeline |
| CN104316218A (en) * | 2014-10-31 | 2015-01-28 | 国家电网公司 | Method for improving accuracy in measuring temperature of casing of GIS disconnecting switch |
| CN104359393A (en) * | 2014-11-28 | 2015-02-18 | 中航电测仪器股份有限公司 | Strain gauge and methods for manufacturing and mounting strain gauge |
-
2015
- 2015-04-23 CN CN201510197058.4A patent/CN104792258A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0961106A (en) * | 1995-08-30 | 1997-03-07 | Ishikawajima Harima Heavy Ind Co Ltd | Method for predicting temperature characteristic of strain gauge |
| WO2003058160A1 (en) * | 2002-01-13 | 2003-07-17 | Zbigniew Drazek | Method for measuring the pipeline creeping |
| CN102162778A (en) * | 2010-12-22 | 2011-08-24 | 天津大学 | Multiple-spindle ratchet wheel strain testing system and method of pipe bend |
| CN102175136A (en) * | 2010-12-22 | 2011-09-07 | 天津大学 | Straight tube multi-axis ratchet wheel strain testing system and method |
| CN202281664U (en) * | 2011-10-19 | 2012-06-20 | 广东美的电器股份有限公司 | Stress-strain measuring device for air conditioner pipeline |
| CN104316218A (en) * | 2014-10-31 | 2015-01-28 | 国家电网公司 | Method for improving accuracy in measuring temperature of casing of GIS disconnecting switch |
| CN104359393A (en) * | 2014-11-28 | 2015-02-18 | 中航电测仪器股份有限公司 | Strain gauge and methods for manufacturing and mounting strain gauge |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108038268A (en) * | 2017-11-18 | 2018-05-15 | 西安交通大学 | GIL running temperature appraisal procedures in a kind of corridor pipe |
| CN108038268B (en) * | 2017-11-18 | 2020-06-02 | 西安交通大学 | Method for evaluating GIL (general in-lane) running temperature in corridor |
| CN110967133A (en) * | 2018-09-29 | 2020-04-07 | 平高集团有限公司 | GIL mechanical property testing device and GIL mechanical property testing system |
| CN110967133B (en) * | 2018-09-29 | 2021-08-06 | 平高集团有限公司 | GIL mechanical property testing device and GIL mechanical property testing system |
| CN114877856A (en) * | 2022-07-13 | 2022-08-09 | 广东电网有限责任公司佛山供电局 | Method, system and equipment for monitoring morphology of GIL pipeline |
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Application publication date: 20150722 |