CN103698042A - High-temperature temperature sensor - Google Patents
High-temperature temperature sensor Download PDFInfo
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- CN103698042A CN103698042A CN201310648591.9A CN201310648591A CN103698042A CN 103698042 A CN103698042 A CN 103698042A CN 201310648591 A CN201310648591 A CN 201310648591A CN 103698042 A CN103698042 A CN 103698042A
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- temperature
- sensing element
- platinum resistance
- temperature sensor
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Abstract
The invention provides a high-temperature temperature sensor. The high-temperature temperature sensor comprises a temperature sensing element assembly, a mounting sleeve, a socket, a plug and a tail accessory which are sequentially arranged, wherein the temperature sensing element assembly comprises a protective sleeve, and a temperature sensing element and an insulating bushing which are arranged in the protective sleeve; a leading wire of the temperature sensing element penetrates into the insulating bushing after being welded with an inner conducting wire; the tail part of the temperature sensing element assembly is sealed by using high-temperature cement; a positioning bayonet which is welded with the protective sleeve is arranged at the front end of the mounting sleeve; temperature signals detected by the temperature sensing element are transmitted to a controller through the socket, the plug and the tail accessory. Compared with the prior art, the high-temperature temperature sensor has the advantages that the temperature sensing element for high-temperature temperature measurement adopts a platinum thermistor; the measurement accuracy is high; the signals are not required to be compensated or amplified; an internal structure adopts segmented design and package; the time constant is small; the reliability is high. Meanwhile, the product is simple in structure, light in weight and convenient to assemble and disassemble, and is suitable for the high temperature measurement of pipeline temperature in the field of aviation, aerospace, chemical industry and metallurgy.
Description
Technical field
The invention relates to the temperature sensor, particularly a kind of high temperature sensor of measuring pipeline air themperature.
Background technology
Temperature sensor is divided into contact and contactless two large classes by metering system, according to sensor internal element material, is divided into thermal resistance and the large class of thermopair two.At present, in aviation field high temperature measurement field, the widely used overwhelming majority is thermopair, however thermopair collect after temperature signal, also need cold junction compensation, signal conversion etc.The internal enclosing structure of temperature sensor is one of its gordian technique, because rational encapsulating structure and encapsulating material, one side can improve the reliability of product, can improve on the other hand response time, the measuring accuracy of sensor.Existing high temperature sensor inner structure is complicated, insulativity is bad, and serviceable life is shorter, the response time is longer, can not meet control system requirement.
Summary of the invention
The problem that the invention will solve is to provide a kind of high temperature sensor, does not need to carry out cold junction compensation and signal again and processes, for measuring the temperature signal of aviation pipeline and temperature signal being delivered to controller.
For solving the problems of the technologies described above, the technical scheme that the invention adopts is: a kind of high temperature sensor, comprises the temperature-sensing element assembly, installation sleeve, socket, the slotting head and tail annex that set gradually; Described temperature-sensing element assembly comprises protective jacket and is located at temperature-sensing element, the insulating bushing of this protective jacket inside, after temperature-sensing element lead-in wire and inner lead welding, penetrates insulating bushing; Temperature-sensing element assembly afterbody seals with high-temperature cement; Described installation sleeve front end is provided with the limited bayonet with protective jacket welding; The temperature signal that temperature-sensing element detects sends controller to by socket, plug, tail annex.
Further, temperature-sensing element assembly is platinum resistance assembly, and temperature-sensing element is platinum resistance.Temperature-sensing element adopts high-precision platinum resistance, and the measurement range of this temperature-sensing element is-55 ℃～600 ℃, and measuring accuracy can reach ± and (0.30+0.005|t|) ℃, dynamic response time (τ=0.632) is not more than 3s.
Further, platinum resistance is 2 and adopts insulating bushing isolation, the gap filling Heat Conduction Material of platinum resistance and insulating bushing.Adopt two platinum resistance to carry out temperature acquisition, two redundancy designs, reliability is high.Two platinum resistance are sealed in the space of Φ 3.2mm, with insulating bushing, isolate mutually, both platinum resistance are played a protective role, and have solved again the Insulation Problems between lead-in wire.
Further, inner lead is the resistant to elevated temperatures nickel wire by Nickel Plating Treatment.Signal output adopts resistant to elevated temperatures nickel wire, and nickel wire is done to Nickel Plating Treatment, improves its corrosion resistance.
Further, protective jacket adopts opening design.Utilize to fill the mobility of Heat Conduction Material, guarantee to fill between platinum resistance and protective jacket closely knit, without clearance, improve the response time of temperature-sensitive end.
Further, installation sleeve is flange arrangement and is provided with a plurality of mounting holes, mounting hole inside fire attack checknut, utilize mounting hole by installation of sensors on pipeline, have easy for installation flexibly, saved on machine, install, the advantage in take-down time.
The method of the platinum resistance assembly of encapsulation high temperature sensor is encapsulated in two platinum resistance in a protective jacket, after platinum resistance lead-in wire welds with nickel wire, through insulating bushing, between platinum resistance and protective jacket shell, fill magnesium oxide slurry, Heat Conduction Material is filled in the gap of platinum resistance and insulating bushing, after fully tamping, drying, welding blanking cover, at protective jacket afterbody filled high-temperature cement seal, afterbody seals with high-temperature cement, solves a difficult problem for the internal oxidation magnesium moisture absorption.
This high temperature sensor is applied in the fields such as Aeronautics and Astronautics, chemical industry, metallurgy, for measuring, gather the temperature signal of medium in pipeline.
Advantage and good effect that the invention has are:
(1) the traditional inner temperature-sensing element of high temperature sensor of aviation field adopts thermopair more, and thermopair need to carry out cold junction compensation and signal conversion.The invention adopts high-precision platinum resistance component encapsulation, without doing cold junction compensation and signal, processes, and directly temperature signal is passed to controller.The measuring accuracy of more traditional high temperature sensor is higher, reproducible, time constant is less.Measuring accuracy can reach ± and (0.30+0.005|t|) ℃, measuring repeatability is ± 0.2 ℃, and dynamic response time is for being not more than 3s.Under hot conditions, the insulation resistance of sensor is not less than 200M Ω, and the material of the temperature sensing part of sensor, mount pad, plug, tail annex is selected high-temperature alloy material, and the integrally-built temperature resistant capability of sensor is strong, high life.Be applicable to the needs of following aviation field high precision, the development of high reliability high temperature sensor.
(2) the invention adopts two platinum resistance to carry out temperature acquisition, two redundancy designs, and reliability is high.The inner structure simplicity of design of temperature sensing part, reasonable, by inner packaging area optimization, is convenient to technique encapsulation.Protective jacket adopts opening design, utilizes the mobility of packing material, guarantees to fill between platinum resistance and protective jacket closely knit, without clearance, improves the response time of temperature-sensitive end.Two platinum resistance are sealed in the space of Φ 3.2mm, with insulating bushing, isolate mutually, both platinum resistance are played a protective role, and have solved again the Insulation Problems between lead-in wire.Signal output adopts resistant to elevated temperatures nickel wire, and nickel wire is done to Nickel Plating Treatment, improves corrosion resistance.Afterbody seals with high-temperature cement, solves a difficult problem for the internal oxidation magnesium moisture absorption.
(3) product weight is lighter, is not more than 180g, simple in structure, installation, convenient disassembly.
Accompanying drawing explanation
Fig. 1 is the contour structures schematic diagram of the invention high temperature sensor;
Fig. 2 is the cut-open view of the invention high temperature sensor;
Fig. 3 is the structural representation of the platinum resistance assembly of the invention high temperature sensor;
Fig. 4 is the structural representation of the protective jacket of the invention high temperature sensor;
Fig. 5 is the structural representation of the installation sleeve of the invention high temperature sensor;
Fig. 6 is the structural representation of the insulating bushing of the invention high temperature sensor.
In figure:
1. platinum resistance assembly 2. installation sleeve 3. sockets
4. plug 5. tail annex 6. magnesium oxide slurries
7. platinum resistance 8. insulating bushing 9. protective jackets
10. nickel wire
Embodiment
In conjunction with the accompanying drawings and embodiments the technical scheme of the invention is elaborated.
As shown in Fig. 1-6, a kind of high temperature sensor, comprises the platinum resistance assembly 1, installation sleeve 2, socket 3, plug 4 and the tail annex 5 that set gradually; Described platinum resistance assembly comprises protective jacket 9 and is located at platinum resistance 7, the insulating bushing 8 of these protective jacket 9 inside, after platinum resistance 7 lead-in wires and nickel wire 10 welding, penetrates insulating bushing 8; The material of insulating bushing 8 is aluminium oxide ceramics, and platinum resistance 7 is played to protection and isolation, insulating effect; The good magnesium oxide slurry 6 of thermal conductivity is filled in space between platinum resistance 7 and protective jacket 9, and platinum resistance assembly 1 afterbody seals with high-temperature cement; The trade mark of high-temperature cement is 919; Solve a difficult problem for internal oxidation magnesium slurry 6 moisture absorptions; Described installation sleeve 2 front ends are provided with the limited bayonet with protective jacket 9 welding; The temperature signal that platinum resistance 7 detects sends controller to by socket 3, plug 4, tail annex 5.Platinum resistance 7 is 2 and adopts insulating bushing 8 isolation, and platinum resistance 7 is filled Heat Conduction Material with the gap of insulating bushing 8, adopts two platinum resistance to carry out temperature acquisition, two redundancy designs, and reliability is high.Two platinum resistance are sealed in the space of Φ 3.2mm, with insulating bushing, isolate mutually, both platinum resistance are played a protective role, and have solved again the Insulation Problems between lead-in wire.Protective jacket 9 adopts openings design, utilizes the mobility of filling Heat Conduction Material, guarantees to fill between platinum resistance and protective jacket closely knit, without clearance, improves the response time of temperature-sensitive end.Installation sleeve 2 is for flange arrangement and be provided with a plurality of mounting holes, mounting hole inside fire attack checknut, utilize mounting hole by installation of sensors on pipeline, have easy for installation flexibly, saved on machine, install, the advantage in take-down time.
The internal enclosing structure of platinum resistance assembly 1 adopts subregion design, front end assembling platinum resistance 7 and filling Heat Conduction Material, the response time of improving the temperature module.Rear end nickel wire 10 with high-temperature cement sealing, plays moisture-proof role after Nickel Plating Treatment, guarantees the environmental resistance of product.
The material of protective jacket 9, installation sleeve 2 is high temperature alloy, the strength of materials, resistance to elevated temperatures are good, installation sleeve 2 is flange arrangement, front end has the bayonet socket that is designed with location use, convenient and protective jacket 9 welding, the hole by 4 φ 3mm is arranged on pipeline, and hole internal whorl carries locking measure, easy for installation flexible, saved installation, take-down time on machine.Back end signal passes to controller by socket, plug, tail annex by resistance signal.
Compare with existing product, the invention be for high-temperature temperature, to measure temperature-sensing element to adopt platinum resistance thermometer sensor,, measuring accuracy is high, signal without compensation, amplify, inner structure adopts sectional type design, encapsulation, time constant is little, reliability is high.Meanwhile, product structure is simple, lightweight, convenient installation, dismounting, the high temperature measurement of applicable aviation field pipeline temperature.
Above the embodiment of the invention is had been described in detail, but described content is only the preferred embodiment of the invention, can not be considered to for limiting practical range of the present invention.All equalization variations of doing according to the invention scope and improvement etc., within all should still belonging to this patent covering scope.
Claims (8)
1. a high temperature sensor, is characterized in that: comprise the temperature-sensing element assembly, installation sleeve (2), socket (3), plug (4) and the tail annex (5) that set gradually;
Described temperature-sensing element assembly comprises protective jacket (9) and is located at this protective jacket (9) inner temperature-sensing element, insulating bushing (8), after temperature-sensing element lead-in wire and inner lead welding, penetrates insulating bushing (8); Temperature-sensing element assembly afterbody seals with high-temperature cement;
Described installation sleeve (2) front end is provided with the limited bayonet with protective jacket (9) welding;
The temperature signal that temperature-sensing element detects sends controller to by socket (3), plug (4), tail annex (5).
2. high temperature sensor according to claim 1, is characterized in that: temperature-sensing element assembly is platinum resistance assembly (1), and temperature-sensing element is platinum resistance (7).
3. high temperature sensor according to claim 2, is characterized in that: platinum resistance (7) is 2 and adopts insulating bushing (8) isolation, the gap filling Heat Conduction Material of platinum resistance (7) and insulating bushing (8).
4. according to the high temperature sensor described in any one in claim 1～3, it is characterized in that: inner lead is the resistant to elevated temperatures nickel wire (10) by Nickel Plating Treatment.
5. high temperature sensor according to claim 4, is characterized in that: protective jacket (9) adopts opening design.
6. according to the high temperature sensor described in claim 1,2,3 or 5, it is characterized in that: installation sleeve (2) is for flange arrangement and be provided with a plurality of mounting holes, mounting hole inside fire attack checknut.
7. the method for platinum resistance assembly of high temperature sensor described in encapsulation claim 2,3 or 5, it is characterized in that: two platinum resistance (7) are encapsulated in a protective jacket (9), after platinum resistance (7) lead-in wire welds with nickel wire (10), through insulating bushing (8), between platinum resistance (7) and protective jacket (9) shell, fill magnesium oxide slurry, platinum resistance (7) is filled Heat Conduction Material with the gap of insulating bushing (8), after fully tamping, drying, welding blanking cover, at protective jacket (9) afterbody filled high-temperature cement seal.
8. the high temperature sensor described in claim 1,2,3 or 5 is applied in the fields such as Aeronautics and Astronautics, chemical industry, metallurgy, for measuring, gather the temperature signal of medium in pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201310648591.9A CN103698042B (en) | 2013-12-03 | 2013-12-03 | A kind of high temperature sensor |
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| CN201310648591.9A CN103698042B (en) | 2013-12-03 | 2013-12-03 | A kind of high temperature sensor |
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| CN103698042B CN103698042B (en) | 2016-09-14 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104501985A (en) * | 2014-12-10 | 2015-04-08 | 陕西法士特齿轮有限责任公司 | Temperature sensor device, measurement processing method thereof and manufacturing method of temperature measuring module |
| CN109456737A (en) * | 2018-11-12 | 2019-03-12 | 天津航空机电有限公司 | A kind of heat filling for temperature sensor, the temperature sensor comprising it and purposes |
| CN111307316A (en) * | 2020-03-19 | 2020-06-19 | 中国计量科学研究院 | Manufacturing method of temperature sensor |
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2013
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104501985A (en) * | 2014-12-10 | 2015-04-08 | 陕西法士特齿轮有限责任公司 | Temperature sensor device, measurement processing method thereof and manufacturing method of temperature measuring module |
| CN109456737A (en) * | 2018-11-12 | 2019-03-12 | 天津航空机电有限公司 | A kind of heat filling for temperature sensor, the temperature sensor comprising it and purposes |
| CN111307316A (en) * | 2020-03-19 | 2020-06-19 | 中国计量科学研究院 | Manufacturing method of temperature sensor |
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| CN103698042B (en) | 2016-09-14 |
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