CN106248238A - A kind of test thermocouple retainer and installation method - Google Patents
A kind of test thermocouple retainer and installation method Download PDFInfo
- Publication number
- CN106248238A CN106248238A CN201610854709.7A CN201610854709A CN106248238A CN 106248238 A CN106248238 A CN 106248238A CN 201610854709 A CN201610854709 A CN 201610854709A CN 106248238 A CN106248238 A CN 106248238A
- Authority
- CN
- China
- Prior art keywords
- thermocouple
- fixture
- heat preservation
- test
- cutting ferrule
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
- G01K7/02—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using thermoelectric elements, e.g. thermocouples
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
- G01K1/14—Supports; Fastening devices; Arrangements for mounting thermometers in particular locations
Abstract
The invention discloses a kind of test thermocouple retainer and installation method, including fixture and heat preservation member；Described fixture includes base and the cutting ferrule of semicircle arcuation of semicircle arcuation, described cutting ferrule and the upper and lower setting of base, and both form the hole passed for thermocouple temperature sleeves, and one end of cutting ferrule is connected with base by axle, and cutting ferrule and base can rotate along axle；The other end of cutting ferrule passes through buckle and base engagement, it is achieved fix thermocouple；Heat preservation member arranges and is enclosed within thermocouple the gap sealed between thermocouple and temperature sleeves.
Description
Technical field
The present invention relates to the instrument of steam turbine thermal test field subsidiary temperature, particularly relate to steam turbine thermal test
The insulation of a kind of test thermocouple, fixing instrument and installation method.
Background technology
Since entering 21 century, along with developing rapidly of China's economy, electricity needs increases rapidly, promotes that power industry is entered
Enter the new period accelerated development.Power construction and the technical equipment of China's power industry are enhanced, large-scale
Thermal power generation unit has had very fast growth, the 600MW unit of supercritical parameter, and the 1000MW unit of supercritical parameter has become
Main force's unit for each bulk power grid of China.
Along with improving constantly of unit parameter, the required precision to the parameter of steam turbine thermal test also improves constantly, and carries
One aspect of high test parameters precision methods is: improve the degree of accuracy of test apparatus；On the other hand it is: the peace of instrument during test
Dress, fixing accurate；The especially measurement (temperature is bigger on enthalpy impact) of temperature.
When measuring temperature in Thermal Performance Test of Steam Turbine and power plant's correlation test, it is necessary to meet test standard to measuring point
Installation requirement.Domestic power plant operations staff monitors and the temperature point of regulation typically uses assembled thermocouple, temperature set
Pipe is welded in thermometric pipeline as requested, simultaneously works as the effect of equipment formula thermocouple base, and thermocouple inserts temperature sleeves
In, top uses screw cap closures insulation.Present stage, domestic DianKeYuan all uses distributed data acquisition plate to carry out temperature and adopts
Collection.Concrete connection: thermocouple inserts the temperature sleeves of pipeline；Thermocouple is connected with distributed data acquisition plate compensating wire；
It is connected with holding wire between distributed data acquisition plate and data collecting instrument；Data collecting instrument is connected by netting twine or USB data line
Receive notebook computer；Just can be with temperature data acquisition.
In order to measure the versatility of equipment and power plant's temperature point when increasing test, reduce the complexity of measurement equipment simultaneously
And cost, thermocouple used by data collecting system is all "one off" production, and size mostly is according to test requirements document: diameter 6mm, length
600-1000mm.Operation safety and operations staff for ensureing unit monitor and regulation unit, can not change fortune during test completely
The temperature point of row, the portion temperature test measuring point that power plant can install specially for thermal performance test.Directly by thermoelectricity during test
The even temperature sleeves that inserts carries out thermometric, is fixed with heat insulation glass silk ribbon and is incubated.The fixed form of this thermocouple exists
Problems with:
1) thermocouple is inserted directly into temperature sleeves and carries out thermometric, is connected with compensating wire, is limited by field condition, thermocouple
Installation fix relatively difficult, the binding of the glass tape that always uses is fixing and insulation, directly increases workload, more gives and install
Personnel's high temperature, high-rise working bring bigger danger.
2) during test, glass tape is filled in temperature sleeves inside holding, be bundled on pipeline with glass tape, therefore increase
The usage amount of glass tape, and glass tape can not be recycled, and adds experimentation cost, the glass in temperature sleeves simultaneously
Glass silk ribbon the most easily blocks temperature sleeves.
3) the temperature sleeves smooth in appearance of test temperature measuring point, glass tape is difficult to fix thermocouple, causes thermocouple
Skid off temperature sleeves, it is impossible to accurately measure temperature data, the biggest to result of the test impact.
4) model of temperature sleeves has multiple (general sleeve outer diameter is 21mm, 23mm), makes troubles to installation.
5) glass tape is unfavorable for health, the most easily pollutes environment simultaneously.
In sum, Thermal Performance Test of Steam Turbine and power plant's correlation test need one to have when measuring temperature simultaneously
The fixing thermocouple fixer with heat insulation function.
Summary of the invention
The purpose of patent of the present invention is contemplated to solve above-mentioned the installation of TC and fixes that workload is big, degree of danger is high, examination
Test that cost is high, easily block that temperature sleeves, result of the test uncertainty be big, temperature sleeves model health complicated, unfavorable, easily pollute ring
The problems such as border；Propose a kind of there is insulation, the test thermocouple fixer of fixing function and installation method；Simple to operate,
Safety, good stability, strong adaptability, low cost, the feature of environmental protection is good, it is often more important that can realize fixing and heat insulation function.
For achieving the above object, the present invention uses following technical proposals, a kind of test thermocouple retainer, mainly includes
Fixture and heat preservation member；
Described fixture includes base and the cutting ferrule of semicircle arcuation of semicircle arcuation, and described cutting ferrule is upper and lower with base
Arranging, both form the hole passed for thermocouple temperature sleeves, and one end of cutting ferrule is connected with base by axle, described cutting ferrule with
Base can rotate along axle；The other end of cutting ferrule passes through buckle and base engagement, it is achieved fix thermocouple；
Described heat preservation member arranges and is enclosed within thermocouple the gap sealed between thermocouple and temperature sleeves.
Further, described base and cutting ferrule the most each include a steel beam column and are arranged on the plastics within steel beam column
Component；Described plastic member is profile of tooth with the contact surface of electric thermo-couple temperature sleeve pipe.
Further, described heat preservation member includes the support of a taper, arranges along its centrage inside conical support
One through hole, is each provided with cylindrical section at the two ends of the support of taper.
Further, the rack outer surface of described taper is wound with asbestos cloth, the outside metal of described asbestos cloth
Net parcel；The two ends of wire netting are connected to cylindrical section.
Further, thermocouple is provided with a suspension member, is hung with a spring, described spring on described suspension member
It is connected by a connector with fixture.
Further, described connector is iron hoop chain.
Further, asbestos fibre rope is used to connect between described fixture and heat preservation member.
The installation method of said apparatus is as follows:
The first step, takes the thermocouple in scene temperature sleeve pipe apart；
Second step, fixture is installed, is opened the steel loop button of fixture base, be enclosed within temperature sleeves by fixture, buckle
Latch closure；
3rd step, is enclosed within heat preservation member on thermocouple, and thermocouple first to overlap the major part of heat preservation member, and coordinates thermocouple
In insertion temperature sleeves, it is ensured that after thermocouple inserts sleeve bottom, heat preservation member is pushed temperature sleeves mouth and stoppers.
4th step, hangs over the spring on thermocouple on the iron hoop chain of fixture.
Further, when off-test, first take spring, then extract thermocouple, take out heat preservation member, unload fixing
Part.
Owing to measuring the difference of pipeline, the degree of depth causing thermocouple insertion temperature sleeves is different, and the heat used when testing
Galvanic couple is again same model, so fixture is different with the distance of spring on thermocouple, on thermocouple to be made, spring stretches
Contracting dynamics is not less than 5N, and this guarantee thermocouple is the tightliest inserted into the bottom of temperature sleeves.
The operation principle of patent of the present invention: test thermocouple retainer is made up of fixture and heat preservation member, and fixture is solid
Determining thermocouple, heat preservation member is incubated.During use, fixture is arranged on temperature sleeves, and heat preservation member is through on thermocouple, will
Thermocouple inserts temperature sleeves and carries out thermometric, pushes away heat preservation member and stoppers to temperature sleeves mouth, finally by iron hoop and thermocouple
Spring handle thermocouple and fixture connect.
The beneficial effect of patent of the present invention:
1) fixture is easy to use, reduces workload, saves the time, it also avoid personnel high temperature, work high above the ground simultaneously
Dangerous.
2) thoroughly solve thermocouple fixing difficult problem under complex environment, be greatly saved the use of glass tape,
Also solve glass tape jam problem in temperature sleeves simultaneously.
3) effect of insulation can be simultaneously worked as, it is ensured that the levels of precision that test temperature is measured.
4) thermocouple sheath of more polytypic is adapted to.
5) improve experiment work condition, make experimental enviroment cleaner and tidier.
Accompanying drawing explanation
Fig. 1 is that distributed data acquisition plate carries out temperature acquisition joint connection in site line schematic diagram.
Fig. 2 is that patent of the present invention is a kind of to be tested with the scheme of installation of thermocouple retainer.
Fig. 3-1,3-2,3-3,3-4 are that patent of the present invention is a kind of tests the fixture schematic diagram with thermocouple retainer and portion
Divide sectional view.
Fig. 4-1,4-2,4-3 are that patent of the present invention is a kind of tests the heat preservation member schematic diagram with thermocouple retainer and section view
Figure.
In figure: 1, thermocouple, 2, fixture, 3, heat preservation member, 4, iron plate, 5, spring, 6, iron hoop chain, 7, asbestos fibre rope,
8, cutting ferrule, 9, base, 10, cutting ferrule-engineering plastics, 11, base-engineering plastics, 12, steel loop button, 13, axle 1,14, steel loop button handle
Hands, 15, axle 2,16, heat preservation member support, 17, soft iron net, 18, asbestos cloth, 19 temperature sleeves.
Detailed description of the invention
The present invention will be further described with embodiment below in conjunction with the accompanying drawings:
A kind of test thermocouple retainer of the present invention is made up of fixture and heat preservation member, and thermocouple fixed by fixture,
Heat preservation member is incubated.During use, fixture is arranged on temperature sleeves, and heat preservation member is through on thermocouple, is inserted by thermocouple
Temperature sleeves carries out thermometric, pushes away heat preservation member and stoppers to temperature sleeves mouth, finally by the spring handle thermoelectricity on iron hoop and thermocouple
Even summation fixture connects.
Fixture, as the term suggests the parts being just integrally fixed on temperature sleeves, it is divided into upper and lower two parts: cutting ferrule, the end
Seat, is linked together by axle, and two parts are all made up of steel and engineering plastics, and engineering plastics are embedded in the shell of steel, with
Time be adapt to smooth temperature sleeves fixing, specially the contact surface of engineering plastics with sleeve pipe is used tooth Shape Design.Steel has height
Tensile strength, elastic limit, high fatigue strength well adapted to hot environment, good springiness just can increase engineering plastics with
The contact area of sleeve pipe, steadiness is good；Can be arranged on again on the sleeve pipe of polytypic.
Heat preservation member is exactly to be enclosed within thermocouple the gap sealed between thermocouple and temperature sleeves, it is ensured that measures temperature and is not subject to
The impact of external environment.Heat preservation member external form is taper seat, is mainly formed by engineering plastics casting, and taper surface is protected by wire gauze parcel
Fire stons cotton forms.
Concrete show such as Fig. 1, fixture 2, heat preservation member 3, iron plate 4, spring 5, iron hoop chain 6, asbestos fibre rope 7, cutting ferrule 8,
Base 9, cutting ferrule-engineering plastics 10, base-engineering plastics 11, steel loop button 12, axle 13, steel loop button handle 14, axle 15, heat preservation member
Support 16, soft iron net 17, asbestos cloth 18.
Concrete annexation is as follows:
Fixture 2 includes base and the cutting ferrule of semicircle arcuation of semicircle arcuation, described cutting ferrule and the upper and lower setting of base,
Both form the hole passed for thermocouple temperature sleeves, and one end of cutting ferrule is connected with base by axle, the other end by latch closure and
Base engagement, it is achieved thermocouple is fixed；
Heat preservation member 3 arranges and is enclosed within thermocouple the gap sealed between thermocouple and temperature sleeves.
As shown in Fig. 3-1,3-2,3-3,3-4, the cutting ferrule of fixture 2 is connected by axle 13 with base, cutting ferrule and base
Can rotate along axle 13, it is achieved folding；Steel loop button handle is connected by axle 15 with base, and steel loop button handle can be along axle 15
Rotate；After axle 13,15 connects corresponding part in process of production, just do processed, it is ensured that cutting ferrule and base, steel loop button handle
Hands will not separate with base.Engineering plastics (cutting ferrule-engineering plastics 10, base-engineering plastics 11) on cutting ferrule and base are edges
It is embedded in respective steel bushing, should not come off and loosen.The material of same steel loop button is steel, flexible and should not be from steel loop button handle
On come off.
Iron hoop chain 6 is added on fixture；Fixture 2 and heat preservation member 3 asbestos fibre rope connect.The length of iron hoop chain 6
Determine according to the distance between temperature sleeves and thermocouple spring, about 400mm.The length relative loose one of asbestos fibre rope
Point, about 300mm.
In Fig. 4-1,4-2,4-3: heat preservation member 3 includes the support of a taper, set along its centrage inside conical support
Put a through hole, be each provided with cylindrical section at the two ends of the support of taper.
Further, the rack outer surface of taper is wound with asbestos cloth, and the outside wire netting of described asbestos cloth wraps up；
The two ends of wire netting are connected to cylindrical section.
Concrete, the support of heat preservation member taper uses engineering plastics casting, is provided with the logical of diameter 8mm along shaft centre line
Hole, two ends are respectively arranged with one section of cylindrical section；Between heat preservation member support two ends, it is wrapped with asbestos cloth during secondary operations, finally twines tapered
Face, with the specific soft iron net parcel processed, soft iron net two ends high temperature dissolves on the face of cylinder at heat preservation member support two ends.Asbestos cloth
Consumption moderate, it is ensured that can contact very well with soft iron net.
Fig. 2 is a kind of test with the scheme of installation of thermocouple retainer.In installation process, first base is stuck in temperature set
Guan Shang, then buckles cutting ferrule, with steel loop buckle on the hook of cutting ferrule, slowly descends compressed steel latch closure handle, and sensation dynamics is moderate, compresses
?.During installation, thermocouple is firstly inserted into heat preservation member major part, and then thermocouple inserts bottom temperature sleeves, stoppers temperature sleeves
Mouthful.Finally according to distance between spring and fixture on thermocouple, select the ring on suitable iron hoop chain, spring is hung
On.
During off-test, take spring, extract thermocouple, take out heat preservation member, unload fixture.Test thermocouple
Holder is reusable.
Concrete enforcement step is as follows:
The first step, takes the thermocouple in scene temperature sleeve pipe apart, if foreign, nothing in test measuring point sleeve pipe to be ensured
Blocking.
Second step, fixture is installed, is opened the steel loop button of fixture base, be enclosed within temperature sleeves by fixture, buckle
Steel loop button, has a try fixing the tightst simultaneously.(selecting steel loop button dynamics according to the model of temperature sleeves)
3rd step, is enclosed within heat preservation member on thermocouple, notices that thermocouple first to overlap the major part of heat preservation member, and coordinates heat
Galvanic couple inserts in temperature sleeves, it is ensured that after thermocouple inserts sleeve bottom, heat preservation member pushes temperature sleeves mouth and stoppers.
4th step, hangs over the iron hoop on fixture by the spring on thermocouple, owing to measuring the difference of pipeline, causes thermoelectricity
The even degree of depth inserting temperature sleeves is different, and the thermocouple used when testing is by for same model, so fixture and thermocouple
The distance of upper spring is different, and on thermocouple to be made, the flexible dynamics of spring is not less than 5N, and this guarantee thermocouple is always
Tightly it is inserted into the bottom of temperature sleeves.
Installation process is paid special attention to: one, fixture is installed solid, two, thermocouple first overlap which end of heat preservation member, three, heat
Galvanic couple inserts sleeve bottom, stoppers heat preservation member, and four, the flexible dynamics of thermocouple spring is not less than 5N.
Although the detailed description of the invention of patent of invention is described by the above-mentioned accompanying drawing that combines, but not the present invention is protected
The restriction of scope, one of ordinary skill in the art should be understood that on the basis of technical scheme, those skilled in the art
Need not to pay various amendments or deformation that creative work can make still within the protection domain of patent of the present invention.
Claims (10)
1. a test thermocouple retainer, it is characterised in that include fixture and heat preservation member；
Described fixture includes base and the cutting ferrule of semicircle arcuation of semicircle arcuation, described cutting ferrule and the upper and lower setting of base,
Both form the hole passed for thermocouple temperature sleeves, and one end of cutting ferrule is connected with base by axle, described cutting ferrule and base
Can rotate along described axle；The other end of cutting ferrule passes through buckle and base engagement, it is achieved fix thermocouple；
Described heat preservation member arranges and is enclosed within thermocouple the gap sealed between thermocouple and temperature sleeves.
2. test thermocouple retainer as claimed in claim 1, it is characterised in that described base and cutting ferrule the most each wrap
Include a steel beam column and be arranged on the plastic member within steel beam column.
3. test thermocouple retainer as claimed in claim 2, it is characterised in that described plastic member and thermocouple temperature
The contact surface of degree sleeve pipe is profile of tooth.
4. test thermocouple retainer as claimed in claim 1, it is characterised in that described heat preservation member includes a taper
Support, inside conical support, one through hole is set along its centrage, and is each provided with cylindrical section at the two ends of conical support.
5. test thermocouple retainer as claimed in claim 4, it is characterised in that the rack outer surface of described taper twines
Being wound with asbestos cloth, the outside wire netting of described asbestos cloth wraps up；The two ends of wire netting are connected to cylindrical section.
6. test thermocouple retainer as claimed in claim 1, it is characterised in that described thermocouple is provided with an extension
Part, is hung with a spring on described suspension member, and described spring is connected by a connector with fixture.
7. test thermocouple retainer as claimed in claim 1, it is characterised in that described connector is iron hoop chain.
8. test thermocouple retainer as claimed in claim 1, it is characterised in that between described fixture and heat preservation member
Asbestos fibre rope is used to connect.
9. the installation method of test thermocouple retainer as claimed in claim 1, it is characterised in that as follows:
The first step, takes the thermocouple in scene temperature sleeve pipe apart；
Second step, fixture is installed, is opened the buckle of fixture, be enclosed within temperature sleeves by fixture, buckle buckle；
3rd step, is enclosed within heat preservation member on thermocouple, and thermocouple first to overlap the major part of heat preservation member, and coordinates to insert thermocouple
In temperature sleeves, it is ensured that after thermocouple inserts sleeve bottom, heat preservation member is pushed temperature sleeves mouth and stoppers；
4th step, hangs over the spring on thermocouple on the iron hoop chain of fixture.
10. method as claimed in claim 9, it is characterised in that when off-test, first take spring, then extract thermoelectricity
Even, take out heat preservation member, unload fixture.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610854709.7A CN106248238B (en) | 2016-09-27 | 2016-09-27 | A kind of experiment thermocouple retainer and installation method |
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|---|---|---|---|
| CN201610854709.7A CN106248238B (en) | 2016-09-27 | 2016-09-27 | A kind of experiment thermocouple retainer and installation method |
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| CN106248238A true CN106248238A (en) | 2016-12-21 |
| CN106248238B CN106248238B (en) | 2018-09-07 |
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| Publication number | Publication date |
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| CN106248238B (en) | 2018-09-07 |
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Address after: 250002 Wang Yue Road, Ji'nan City, Shandong Province, No. 2000 Patentee after: SHANDONG ELECTRIC POWER Research Institute Patentee after: STATE GRID CORPORATION OF CHINA Address before: 250002 Wang Yue Road, Ji'nan City, Shandong Province, No. 2000 Patentee before: SHANDONG ELECTRIC POWER Research Institute Patentee before: State Grid Corporation of China |
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Effective date of registration: 20220125 Address after: 250003 No. 2000, Wang Yue Road, Shizhong District, Ji'nan, Shandong Patentee after: ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID SHANDONG ELECTRIC POWER Co. Patentee after: STATE GRID CORPORATION OF CHINA Address before: 250002 Wang Yue Road, Ji'nan City, Shandong Province, No. 2000 Patentee before: SHANDONG ELECTRIC POWER Research Institute Patentee before: STATE GRID CORPORATION OF CHINA |