CN104596661B - Thermometric armoured thermocouple - Google Patents
Thermometric armoured thermocouple Download PDFInfo
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- CN104596661B CN104596661B CN201510078330.7A CN201510078330A CN104596661B CN 104596661 B CN104596661 B CN 104596661B CN 201510078330 A CN201510078330 A CN 201510078330A CN 104596661 B CN104596661 B CN 104596661B
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- thermocouple
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Abstract
The present invention discloses a kind of thermometric armoured thermocouple; support tube is arranged with outside armoured thermocouple; armoured thermocouple is arranged in protection sleeve pipe by support tube; multipair thermocouple wire is provided with armoured thermocouple; the hot junction of armoured thermocouple is provided with alundum tube, and the elongated end of the multipair thermocouple wire of armoured thermocouple is each passed through the through hole of alundum tube, is welded into hot junction; thermal conductivity filler is filled between hot junction and protection sleeve pipe, the cold end of thermocouple wire is connected by sealed connecting component with compensating cable；The clamp nut being connected with installation of guard sleeve portion is set with support tube, compress gasket is provided between clamp nut and the installation portion of protection sleeve pipe.Compact conformation of the present invention, it is safe and reliable with thermoelectricity capability is good, radiation-resistant property is good, resistance to elevated temperatures is good, reliability is high, it is easy to promote.
Description
Technical field
The invention belongs to a kind of temperature measuring equipment, and in particular to a kind of thermometric armoured thermocouple.
Background technology
Substantial amounts of heat can be produced in power generation process, the normal operation of generating operation mode can be influenceed in the case of a high temperature, therefore
Power supply cooling agent is needed adjust electric power generation reaction temperature, measured by temperature sensor assembly power supply cooling agent go out entrance
Temperature, and the temperature signal measured is sent to control system, it is monitored by control system, so that it is guaranteed that generating operation mode
Safe operation.Wherein temperature sensor assembly is highly important part in electric power generation reaction, but existing temperature sensor group
Part is generally all the temperature for measuring power supply cooling pipe outer tube wall, and temperature sensor assembly is in vacuum environment, because of vacuum ring
Border can take away substantial amounts of heat, therefore the data accuracy of measurement is low, and reaction speed is slow, easily be damaged by the high temperature of power supply cooling agent
It is bad, and radiation can be produced in electric power generation reaction, the lower thermoelectrical potential output of radiation will be unstable, influences the performance generated electricity.
The content of the invention
The invention aims to overcome the deficiencies in the prior art, there is provided a kind of thermometric armoured thermocouple, the thermocouple
Good seal performance, reliability is high, high temperature resistant, irradiation, fast response time.
The purpose of the present invention can be achieved through the following technical solutions：
A kind of thermometric armoured thermocouple, including protection sleeve pipe and armoured thermocouple, described protection sleeve pipe one end are sealing, separately
One end is to be provided with outside spring installation cavity, the armoured thermocouple to be arranged with support tube in the installation portion provided with insert port, installation portion,
Armoured thermocouple is arranged in protection sleeve pipe by support tube, and multipair thermocouple wire, armouring heat are provided with the armoured thermocouple
The hot junction of galvanic couple is provided with alundum tube, and the alundum tube is provided with multiple through holes passed through for thermocouple wire, the armoured thermocouple
The elongated end of multipair thermocouple wire be each passed through the through hole of alundum tube, be welded into hot junction, the hot junction and protection sleeve pipe
Between be filled with thermal conductivity filler, the cold end of the multipair thermocouple wire is connected by sealed connecting component with compensating cable；It is described
Positioning sleeve, spring, compress gasket and clamp nut are arranged with support tube successively, the positioning sleeve is fixed on support tube
On, positioning sleeve and spring are located in the spring installation cavity of installation portion, and spring one end is against on positioning sleeve, and the other end is against pressure
On tight pad, clamp nut is connected with the installation portion of protection sleeve pipe, promotes positioning sleeve by spring, makes the heat of armoured thermocouple
Contact is fully contacted with protection sleeve pipe.
Two both positive and negative polarity thermocouple wires of each pair electric heating thermo wires elongated end are welded into a hot junction, multipair thermocouple wire
Hot junction is welded into total hot junction.
Magnesium oxide powder filled with insulation between each thermocouple wire in the armoured thermocouple.
The armoured thermocouple is K-type armoured thermocouple.
The installation portion is made up of the connection boss set along protection sleeve pipe excircle and the extension axially extended, institute
Extension is stated provided with external screw thread, interior to be provided with spring installation cavity, the internal diameter of the spring installation cavity is more than the external diameter of support tube.
The joint face finish of the installation portion is not less than 3.2um.
The armoured thermocouple is sintered at alundum tube ceramic seal, and armoured thermocouple and corundum tube outer surface are used
Bonding agent is pasted and fixed in support tube.
The finish of the support tube outer surface is not less than 3.2um.
The thermal conductivity filler use purity for more than 99.6% tungsten powder.
The compress gasket uses nickel pad.
Beneficial effects of the present invention：The present invention's is simple in construction, is constituted using protection sleeve pipe and armoured thermocouple, described to protect
Protecting pipe is weldingly fixed on the cooling pipe of coolant system in advance by installation portion, and support is arranged with outside armoured thermocouple
Pipe, armoured thermocouple is arranged in protection sleeve pipe by support tube, and the protection sleeve pipe protects thermocouple probes not by outside mechanics
Effect, while isolating cooling medium；Multipair thermocouple wire is provided with armoured thermocouple, it is ensured that at least one in multipair thermocouple wire
Thermocouple wire can be worked, correct temperature signal is exported to control system, the hot junction of armoured thermocouple is provided with alundum tube, armour
The multipair thermocouple wire for filling thermocouple passes through each through hole of alundum tube, and the hot junction of multipair thermocouple wire is welded into total hot junction,
Become type of appearing.Two both positive and negative polarity thermocouple wires of each pair thermocouple wire elongated end can be more separately as a temperature measuring point
Multigroup measurement temperature was both played a part of to thermocouple wire, and had played a part of positioning again and fixed alundum tube.Pass through clamp nut
Coordinating with installation portion screw thread makes spring under the promotion of compress gasket, promotes the positioning sleeve being fixed on support tube, makes armouring
Thermojunction is fully contacted with protection sleeve pipe inner surface, it is ensured that the hot junction of protection sleeve pipe generating surface and armoured thermocouple
Between necessary heat transfer, the temperature measurement accuracy and thermal response time of armoured thermocouple are improved, while being easy to tearing open for thermocouple
Dress.Heat Conduction Material is filled between hot junction and protection sleeve pipe, it is ensured that thermojunction can be sensed more accurately by hotlist
The temperature in face, improves the response time of thermocouple.Therefore compact conformation of the present invention, lightweight, with thermoelectricity capability is good, resistance to spoke
According to performance is good, resistance to elevated temperatures is good, reliability is high, the performance such as fast is responded, good sealing effect is safe and reliable, be easy to promote.
Magnesium oxide powder filled with insulation between each thermocouple wire in the armoured thermocouple, it is to avoid each pair of thermoelectricity
Contact with each other conduction between thermo wires, so as to influence the performance of thermocouple.
The armoured thermocouple is sintered at alundum tube ceramics, using the insulation of ceramic seal armoured thermocouple, armour
Dress thermocouple and corundum tube outer surface are pasted and fixed in support tube using bonding agent, make armoured thermocouple, alundum tube and support
Pipe is integral, and is easily installed in protection sleeve pipe.
The installation portion is made up of the connection boss set along protection sleeve pipe excircle and the extension axially extended, is protected
Protecting pipe is stretched into cooling pipe, is weldingly fixed on by the connection boss of installation portion on cooling pipe, the extension is provided with
External screw thread, interior to be provided with spring installation cavity, the internal diameter of the spring installation cavity is more than the external diameter of support tube, be easy to positioning sleeve and
Spring is in spring installation cavity, and this structure design is easy to disassemble and changes.
The joint face finish of the installation portion is not less than 3.2um, and the finish of the support tube outer surface is not less than
3.2um, sealing effectiveness is more preferable.
Thermal conductivity filler uses purity for more than 99.6% tungsten powder, improves response speed.
The compress gasket uses nickel pad, makes compress gasket good seal performance.
Brief description of the drawings
Fig. 1 is the structural representation of specific embodiment 1；
Fig. 2 is the structural representation of the positioning sleeve of specific embodiment 1
Fig. 3 is Fig. 2 A-A sectional views；
Fig. 4 is structural representation of the installation of TC of specific embodiment 1 on ring flange；
Fig. 5 is the structural representation of specific embodiment 2.
In accompanying drawing：1 is that protection sleeve pipe, 1-1 are installation portion, 2 are that armoured thermocouple, 2-1 are that thermocouple wire, 2-2 are that heat connects
Point, 3 be sealed connecting component, 4 be compensating cable, 5 be support tube, 6 be alundum tube, 7 be thermal conductivity filler, 8 be positioning sleeve, 9
It is compress gasket for spring, 10,11 be clamp nut, 12 be total hot junction, 13 be magnesium oxide powder, 14 is ferrule fitting, 15
For ring flange.
Embodiment
The present invention is further illustrated below in conjunction with the accompanying drawings.
Specific embodiment 1：
Referring to shown in Fig. 1 to Fig. 4, a kind of thermometric armoured thermocouple, including protection sleeve pipe 1 and armoured thermocouple 2, it is described to protect
Sealing is processed into the one end of protecting pipe 1, and the other end is installation portion 1-1, the installation portion 1-1 provided with insert port by along protection sleeve pipe
The connection boss that 1 excircle is set is constituted with the extension axially extended, and the extension is in cylinder type, and the extension is set
There is external screw thread, interior to be provided with spring installation cavity, the internal diameter of the spring installation cavity is more than the external diameter of support tube 5.The protection sleeve pipe 1
Formed using the integral overall processing of 316H stainless steels, the installation portion 1-1 is welded on cooling pipe, for by protection sleeve pipe 1
On cooling pipe, the installation portion 1-1 of protection sleeve pipe 1 is welded on cooling pipe in advance using argon arc welding, and it is mainly made
Be reduce welding deformation.Weld bond carries out defect detecting test, protects thermocouple probes not by outside mechanical function, while isolating cooling
Medium is such as：Sodium potassium medium.
The armoured thermocouple 2 is that multipair thermocouple wire 2-1 is provided with K-type armoured thermocouple, armoured thermocouple 2, described
Magnesium oxide powder 13 filled with insulation between each thermocouple wire 2-1 in armoured thermocouple 2, the thermocouple wire 2-1 is used
Provided with n to thermocouple wire 2-1 in NiCr-NiAl thermo wires materials, armoured thermocouple 2, n is the positive integer more than 1, armoured thermocouple
Support tube 5 is arranged with outside the 2 2n root thermocouple wires stripped out, the armoured thermocouple 2, support tube 5 uses stainless steel tube, armouring heat
Galvanic couple 2 is arranged in protection sleeve pipe 1 by support tube 5, and the hot junction of armoured thermocouple 2 is provided with alundum tube 6, and the alundum tube 6 is
The porcelain tube being made using high purity aluminium oxide, the alundum tube 6 is provided with multiple through holes passed through for thermocouple wire, the through hole
Quantity is identical with each thermocouple wire 2-1 quantity in armoured thermocouple 2, and alundum tube 6 is provided with 2n through hole, the armoured thermocouple
2 at alundum tube sintering have ceramic seal, the armouring part of armoured thermocouple 2 is insulated by ceramic seal, armouring heat
Galvanic couple 2 and the outer surface of alundum tube 6 scribble one layer of bonding agent and are pasted and fixed in support tube 5, and the bonding agent is viscous for high temperature inorganic
Agent is connect, is penetrated before high temperature inorganic bonding agent is not dry in stainless steel support tube 5, makes armoured thermocouple 2, alundum tube 6 and support tube 5
The entirety that three parts are combined into.The elongated end difference of the 2n roots thermocouple wire (n root positive poles, n roots negative pole) of the armoured thermocouple 2
Through the through hole of alundum tube 6, the hot junction of two both positive and negative polarity thermocouple wire 2-1 welding of each pair electric heating thermo wires 2-1 elongated ends can
With separately as a temperature measuring point.2n root thermocouple wires are welded into a total hot junction 12, constitute 1 armouring for having n point thermometrics
Thermocouple 2, becomes type of appearing, and total hot junction 12 both plays a part of measurement temperature, and positioning and fixed corundum are played again
The effect of pipe 6.The measurement end of the present invention is designed as alundum tube 6 plus armoured thermocouple Combination Welding structure, is because in protection pipe
In the case of essential, the structure measurement temperature-responsive time is most fast.If the thermocouple one pair of which or multipair of the present invention
After thermocouple wire is damaged, as long as thering is what a pair of thermocouple wires be can work, so as to ensure that the reliable of armoured thermocouple
Property.The external diameter of the armoured thermocouple 2 of the present embodiment is φ 4, and length is less than 72 meters, and the measurement end of armoured thermocouple 2 has been stripped out
11mm thermocouple wire 2-1, the external diameter of support tube 5 is φ 5, and internal diameter is φ 4.2, and the external diameter of the alundum tube 6 is φ 4, long
Spend for 5mm.
Positioning sleeve 8, spring 9, compress gasket 10 and clamp nut 11, the bullet are arranged with the support tube 5 successively
Spring 9 is made from the austenitic stainless steel for meeting GB/T14992-2005 requirements, and the positioning sleeve 8 is provided with taper, locator card
Side wall one end of set 8 is thin, and the other end is thick, and the structure is easy to the deformation of positioning sleeve 8 to connect and fix, and the thick end of positioning sleeve 8 is inside
Recessed, the structure is easy to spring 9 to promote positioning sleeve 8, the thermocouple wire of armoured thermocouple 2 is contacted with protection sleeve pipe inwall, fixed
Position cutting ferrule 8 is made using 316H stainless steels, and positioning sleeve 8 is enclosed on support tube 5, after it is determined that good position is good, by fixed
The position deformation of cutting ferrule 8 is fixed on support tube 5, and positioning sleeve 8 and spring 9 are located in installation portion 1-1 spring installation cavity,
The one end of spring 9 is against on positioning sleeve 8, and the other end is against on compress gasket 10.Clamp nut 11 and the installation portion of protection sleeve pipe 1
1-1 screw threads coordinate, and compress gasket 10 is located between clamp nut 11 and the installation portion 1-1 of protection sleeve pipe 1, the compress gasket 10
Using nickel pad, tighten clamp nut 11, the extruding compress gasket 10 of clamp nut 11, spring 9 under the promotion of compress gasket 10,
Positioning sleeve 8 is promoted to the inner surface of protection sleeve pipe 1, total hot junction 12 of the armoured thermocouple 2 and the sealing of protection sleeve pipe 1
The inwall contact at end, makes the temperature survey of armoured thermocouple 2 more accurate, the response time, faster measured value was about accurate, while just
In dismounting and change armoured thermocouple 2.
Thermal conductivity filler 7 is filled between the hot junction 2-1 and protection sleeve pipe 1, the thermal conductivity filler 7 is using pure
For more than 99.6% tungsten powder, it is ensured that there is necessity between the generating surface of protection sleeve pipe 1 and thermocouple wire 2-1 hot junction
Heat transfer, improve the thermocouple response time；The cold end of the thermocouple wire 2-1 passes through sealed connecting component 3 and the phase of compensating cable 4
Even, the cored wire number of compensating cable 4 is corresponding with the thermocouple wire quantity in armoured thermocouple 2, and the cored wire and armouring of compensating cable 4
The thermocouple wire material of thermocouple 2 is identical, the cored wire model shielding extended pattern of the compensating cable 4.Thermocouple of the present invention
Compensating cable 4 is connected with control system, and temperature measurement signal is exported to control system.
The support tube 5 is connected on ring flange 15 by ferrule fitting 14, is arranged on by ring flange 15 on vacuum chamber.
Further：The finish that the installation portion 1-1 of the protection sleeve pipe 1 contacts end face with cooling pipe is not less than
3.2um, sealing effectiveness is more preferable, it is ensured that protection sleeve pipe 1 and cooling agent security seal.
Further：The finish of the support tube outer surface is not less than 3.2um, it is ensured that when tightening ferrule fitting 14,
Ferrule fitting 14 is deformed, and reaches the effect being fully sealed.The finish that the ring flange 15 installs contact end face is not less than
3.2um, it is ensured that by bolt presses ring flange, makes being fully sealed for ring flange 15 and vacuum chamber.
The operation principle of the present invention：
The temperature of cooling agent is measured using armoured thermocouple of the present invention, first by the side opening of cooling pipe by protection sleeve pipe
1 stretches into cooling pipe, is welded on by the installation portion 1-1 of protection sleeve pipe 1 on cooling pipe；If then armoured thermocouple 2
Xeothermic thermocouple wire is welded into outside total hot junction 12, armoured thermocouple 2 through alundum tube 6 and is cased with support tube 5, and support tube 5 is cased with outside
The insertion protection sleeve pipe 1 of armoured thermocouple 2 in, coordinated by clamp nut 11 and installation portion 1-1 screw threads, by armoured thermocouple 2
It is locked in protection sleeve pipe 1, and the multipair thermocouple wire 2-1 of armoured thermocouple 2 is in close contact with the inwall of protection sleeve pipe 1,
The temperature of cooling agent in cooling pipe is measured by multipair thermocouple wire 2-1；Thermocouple of the present invention is finally passed through into ferrule fitting
14 and ring flange 15 be fixedly mounted on vacuum chamber.The coolant temperature that armoured thermocouple of the present invention is measured is 620 DEG C, at thermocouple
In vacuum (1.0 × 10-5Pa) in environment, because vacuum environment can take away substantial amounts of heat, in order to which temperature survey is accurate, thermocouple
Measurement end fully effectively contacted with protection sleeve pipe inwall and just seem and be more necessary.Response time, precision was reachable up to 2.5s
± 0.5 DEG C, continuous phase >=2.6 × 10 of service life I4H, II phase >=5.3 × 104h(600℃).The present invention is solved in high temperature ring
Signal transfer reliability problem under border, meeting the requirement that cooling agent thermometric is badly in need of in power generation process, there is provided one kind is high-precision, resistance to
Irradiation, highly reliable, miniaturization temperature thermocouple.
1. using the armoured thermocouple response time test result such as table 1 of armoured thermocouple of the present invention and other different structures
It is shown；
Table 1：Response time statistical form
It is most short by the thermometric reaction time that can draw the thermocouple of sample number into spectrum 1 of table 1, but the thermocouple does not have band to protect
Protecting pipe, is not suitable for the temperature for being used for measuring cooling agent in cooling pipe.Numbering 2 is that numbering 1 is additionally arranged protection pipe, and its structure is set
Meter is adapted to the temperature of cooling agent in measurement cooling pipe, but the response time is substantially more much longer than numbering 5, therefore inventive samples are compiled
Numbers 5 short relative to other sample thermometric reaction time.
2. the insulating properties of the present invention measured by insulation resistance test are as shown in table 2；
The insulation resistance test of table 2
It can be seen from Table 2 that thermocouple of the present invention in 20 DEG C of room temperature insulaion resistances and 370 DEG C of high-temperature insulation resistances all very
It is high, it is ensured that the accuracy of thermocouple WeChat ID, it is to avoid streaming error caused by insulation is bad.
3. it is as shown in table 3 to test the thermo-electromotive force of obtained armoured thermocouple of the present invention at different temperatures by indexing；
The indexing experiment of table 3
It can be seen from Table 3 that all very high (essence of thermocouple of the present invention measurement accuracy in 50 DEG C to 800 DEG C whole warm areas
Degree meets ± 1.1 DEG C or 0.4t%), dispersed very little (half for being less than franchise) meets that cooling agent thermometric accuracy is high, resistance to height
Warm nature can the high requirement of good, reliability.
Specific embodiment 2：
It is shown in Figure 5, be the characteristics of the present embodiment：Branched armoured thermocouple is installed, using n branch on the ring flange
The effect of (n ＞ 1) thermocouple is that, when failing for any 1 to n-1 branch thermocouple, at least 1 thermocouple is remained to control system
The correct temperature signal of system output.Other features are identical with specific embodiment 1.
Claims (10)
1. a kind of thermometric armoured thermocouple, including protection sleeve pipe（1）And armoured thermocouple（2）, it is characterised in that：The protective case
Pipe（1）One end is sealing, and the other end is the installation portion provided with insert port（1-1）, installation portion（1-1）It is interior to be provided with spring installation cavity,
The armoured thermocouple（2）It is arranged with support tube outside（5）, armoured thermocouple（2）Pass through support tube（5）Installed in protection sleeve pipe
（1）It is interior, the armoured thermocouple（2）It is interior to be provided with multipair thermocouple wire（2-1）, the hot junction of armoured thermocouple (2) is provided with alundum tube
(6), the alundum tube (6) is provided with multiple through holes passed through for thermocouple wire, the multipair thermocouple of the armoured thermocouple (2)
The elongated end of silk is each passed through the through hole of alundum tube (6), is welded into hot junction, is filled out between the hot junction and protection sleeve pipe (1)
Filled with thermal conductivity filler (7), the multipair thermocouple wire（2-1）Cold end pass through sealed connecting component（3）With compensating cable（4）Phase
Even；Positioning sleeve (8), spring (9), compress gasket (10) and clamp nut are arranged with the support tube (5) successively（11）, institute
State positioning sleeve (8) and be fixed on support tube（5）On, positioning sleeve (8) and spring (9) are located at installation portion（1-1）Spring install
In chamber, spring (9) one end is against on positioning sleeve (8), and the other end is against on compress gasket (10), clamp nut（11）With protection
Sleeve pipe（1）Installation portion（1-1）It is connected, passes through spring（9）Promote positioning sleeve（8）, make the hot junction of armoured thermocouple (2) with
Protection sleeve pipe（1）Fully contact.
2. thermometric armoured thermocouple according to claim 1, it is characterised in that：Each pair electric heating thermo wires（2-1）Elongated end
Two both positive and negative polarity thermocouple wires（2-1）It is welded into a hot junction（2-2）, multipair thermocouple wire（2-1）Hot junction be welded into
Total hot junction（12）.
3. thermometric armoured thermocouple according to claim 1 or 2, it is characterised in that：It is each in the armoured thermocouple (2)
Thermocouple wire（2-1）Between filled with insulation magnesium oxide powder（13）.
4. thermometric armoured thermocouple according to claim 1, it is characterised in that：The armoured thermocouple（2）For K-type armouring
Thermocouple.
5. thermometric armoured thermocouple according to claim 1, it is characterised in that：The installation portion（1-1）By along protective case
Pipe（1）The connection boss that excircle is set is constituted with the extension axially extended, and the extension is provided with external screw thread, is inside provided with
Spring installation cavity, the internal diameter of the spring installation cavity is more than support tube（5）External diameter.
6. thermometric armoured thermocouple according to claim 1 or 5, it is characterised in that：
The installation portion（1-1）Joint face finish be not less than 3.2um.
7. thermometric armoured thermocouple according to claim 1, it is characterised in that：The armoured thermocouple (2) is close to corundum
Pipe (6) place sintering has ceramic seal, and armoured thermocouple (2) and alundum tube (6) outer surface are pasted and fixed on support using bonding agent
Pipe（5）In.
8. thermometric armoured thermocouple according to claim 1, it is characterised in that：Support tube (5) outer surface it is bright and clean
Degree is not less than 3.2um.
9. thermometric armoured thermocouple according to claim 1, it is characterised in that：The thermal conductivity filler (7) uses purity
For more than 99.6% tungsten powder.
10. thermometric armoured thermocouple according to claim 1, it is characterised in that：The compress gasket (10) uses nickel pad
Piece.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510078330.7A CN104596661B (en) | 2015-02-13 | 2015-02-13 | Thermometric armoured thermocouple |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510078330.7A CN104596661B (en) | 2015-02-13 | 2015-02-13 | Thermometric armoured thermocouple |
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| CN104596661A CN104596661A (en) | 2015-05-06 |
| CN104596661B true CN104596661B (en) | 2017-09-26 |
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| CN112525366B (en) * | 2020-11-27 | 2023-03-14 | 中国航发四川燃气涡轮研究院 | Air suction type pluggable thermocouple probe for engine air inlet total temperature dynamic distortion test |
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| CN203365006U (en) * | 2013-07-25 | 2013-12-25 | 淮安柯林斯尼电气有限公司 | Telescopic thermocouple |
| CN203443701U (en) * | 2013-08-26 | 2014-02-19 | 安徽蓝德集团股份有限公司 | Temperature sensitive element applied to power station |
| CN104089715A (en) * | 2014-07-29 | 2014-10-08 | 中国核动力研究设计院 | Thermocouple insulation locator, mounting method thereof and wall temperature measuring device |
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2015
- 2015-02-13 CN CN201510078330.7A patent/CN104596661B/en active Active
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