CN101173873A - Nuclear grade platinum resistance thermometer and its method for reducing thermal response time - Google Patents
Nuclear grade platinum resistance thermometer and its method for reducing thermal response time Download PDFInfo
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- CN101173873A CN101173873A CNA2006101178045A CN200610117804A CN101173873A CN 101173873 A CN101173873 A CN 101173873A CN A2006101178045 A CNA2006101178045 A CN A2006101178045A CN 200610117804 A CN200610117804 A CN 200610117804A CN 101173873 A CN101173873 A CN 101173873A
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- platinum resistance
- protective casing
- resistance element
- response time
- thermal response
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- Monitoring And Testing Of Nuclear Reactors (AREA)
Abstract
The invention relates to a nuclear-grade platinum resistance thermometer and the method for reducing thermal response time with the invention, comprising a terminal box, a wiring board arranged in the terminal box, and a protective sleeve with a built-in platinum resistance element, wherein, the temperature sensing surface of the platinum resistance element is clung tightly to the inner surface of the protective sleeve, and no MgO powder is filled between the platinum resistance element and the protective sleeve; the outer surface of the protective sleeve is clung tightly to the inner surface of an external protective tube; the platinum resistance element is welded with an armored leading wire; MgO powder is filled in the armored leading wire; a metal coat is plated on the outer surface of the protective sleeve. The invention has the advantages that due to the temperature sensing surface of the platinum resistance element clung tightly to the protective sleeve and the protective sleeve clung tightly to the external protective tube, the heat conductivity of the thermometer is improved; the thermal response time is reduced; the earthquake resistant requirement for nuclear power station is satisfied; due to wear-resistant, heat-resistant, and oxidation-resistant special metal coating on the surface of the protecting sleeve, the protecting sleeve does not stick to the protective tube due to oxidation corrosion.
Description
Technical field
The invention belongs to the temperature measuring instrument technical field; be specifically related to the architecture advances and the method that reduces thermal response time of platinum-resistance thermometer; make it be applicable to nuclear power station, be reactor power control system, reactor protection system and thermal technology's control system provide cooling medium corresponding temperature signal.
Background technology
The nuclear power station working condition is very harsh, in reactor cooling system, the little inertia platinum-resistance thermometer of measuring hot and cold section temperature of loop, medial temperature is 1 grade of equipment of nuclear safety, require instrument can stand the operating mode of long-term high temperature, high pressure, irradiation and cooling medium high speed impact, and the earthquake of wanting to stand suitable intensity tests, require platinum-resistance thermometer thermal response time (thermal inertia) little simultaneously, τ
0.632≤ 1.5s.And conventional platinum-resistance thermometer be with the ceramic platinum resistance component package in the metal coating sleeve pipe; the platinum resistance component ambient fills up the MgO powder and plays insulation and antihunt action; because the MgO powder has intercepted platinum resistance element temperature-sensitive face and has contacted with the direct of metal sleeve; the thermal conductivity of MgO powder own is poor again; and for making platinum-resistance thermometer can stand the outer protection tube of the also essential increase of long-term high temperature, high pressure, irradiation and cooling medium high speed impact; these two factors make the platinum-resistance thermometer thermal response time grow (thermal inertia is bigger), τ
0.632〉=8s, obviously, conventional platinum-resistance thermometer can not satisfy nuclear power cause demand.
Summary of the invention
The objective of the invention is: a kind of harsh working condition of nuclear power station, little inertia platinum-resistance thermometer of nuclear level that high safety is reliable, thermal inertia is little of being applicable to is provided.
For achieving the above object, the technical solution used in the present invention is: the little inertia thermal sleeve platinum-resistance thermometer of nuclear level, comprise: terminal box, place that wiring in the terminal box is pulled, the protective casing of built-in platinum resistance element, it is characterized in that: the inside surface of described platinum resistance element temperature-sensitive face and protective casing fits tightly; The outside surface of described protective casing fits tightly with outer protection tube inside surface; Described platinum resistance element and armoring lead wire are welded to connect, and fill the MgO powder between lead-in wire.Described protective casing outside surface is coated with wear-resisting, heat-resisting, sludge proof metallic coating.
The method that the little inertia platinum-resistance thermometer of nuclear level reduces thermal response time comprises:
1. platinum resistance element temperature-sensitive face directly places the protective casing endoporus, do not fill the MgO powder in the protective casing endoporus, make platinum resistance element temperature-sensitive face fit tightly the protective casing inside surface, inside surface fits tightly between described protective casing outside surface and the outer protection tube, improve heat conductivity, reduce the platinum-resistance thermometer thermal response time;
2. platinum resistance element and protective casing gap are very little only is 0.10mm, and inside surface fits tightly between described protective casing outside surface and the outer protection tube, and the gap is 0.05mm only, fills up the MgO powder in armoring lead wire, has satisfied the shockproof requirements of nuclear level instrument.
3. the protective casing appearance is coated with wear-resisting, heat-resisting, sludge proof particulate metal coating, after the platinum-resistance thermometer long-term work, can not produce bonding because of oxidation corrosion between protective casing and the outer protection tube.
Good effect of the present invention is: platinum resistance element temperature-sensitive face is close to protective casing, fits tightly between protective casing and the outer protection tube, and heat conductivity is improved, and has reduced the platinum-resistance thermometer thermal response time; Wear-resisting, heat-resisting, sludge proof particulate metal coating that the protective casing appearance is coated with can not produce bonding because of oxidation corrosion between protective casing and the outer protection tube.
Description of drawings
The invention will be further described below in conjunction with drawings and Examples.
Fig. 1 structural representation of the present invention;
Fig. 2 the present invention detects end structure for amplifying synoptic diagram.
Among the figure, the 1-terminal box; The 2-wiring is pulled; The 3-armoring lead wire; 4-platinum resistance element; The 5-protective casing; The outer protection tube of 6-; The 7-MgO powder; The 8-coating.
Embodiment
The little inertia platinum-resistance thermometer of nuclear level comprises: terminal box 1, place that wiring in the terminal box pulls 2, the protective casing 5 of built-in platinum resistance element 4, it is characterized in that: the inside surface of described platinum resistance element 4 temperature-sensitive faces and protective casing 5 fits tightly; The outside surface of described protective casing 5 fits tightly with outer protection tube 6 inside surfaces; Described platinum resistance element 4 is welded to connect with armoring lead wire 3, fills MgO powder 7 between lead-in wire.
The gap is 0.10mm between described platinum resistance element 4 and protective casing 5 inside surfaces.The gap is 0.05mm between protective casing 5 outside surfaces and outer protection tube 6 inside surfaces.Described protective casing 5 outside surfaces are coated with wear-resisting, heat-resisting, sludge proof metallic coating 8.
Claims (5)
1. nuclear grade platinum resistance thermometer, comprise: terminal box (1), place wiring in the terminal box to pull the protective casing (5) of (2), built-in platinum resistance element (4), it is characterized in that: the inside surface of described platinum resistance element (4) temperature-sensitive face and protective casing (5) fits tightly; The outside surface of described protective casing (5) fits tightly with outer protection tube (6) inside surface; Described platinum resistance element (4) is welded to connect with armoring lead wire (3), fills MgO powder (7) between armoring lead wire (3).
2. according to the described nuclear grade platinum resistance thermometer of claim 1, it is characterized in that: described protective casing outside surface is coated with wear-resisting, heat-resisting, sludge proof metallic coating (8).
3. reduce the method for thermal response time according to the described nuclear grade platinum resistance thermometer of claim 1; it is characterized in that: platinum resistance element (4) directly places the endoporus of protective casing (5); do not fill the MgO powder between described platinum resistance element (4) and the protective casing (5); make platinum resistance element (4) temperature-sensitive face fit tightly the inside surface of protective casing (5); fit tightly between described protective casing (5) outside surface and outer protection tube (6) inside surface; improve heat conductivity, reduced the platinum-resistance thermometer thermal response time.
4. reduce the method for thermal response time according to the described nuclear grade platinum resistance thermometer of claim 3; it is characterized in that: described platinum resistance element (4) is very little with protective casing (5) gap only to be 0.10mm; fit tightly between described protective casing (5) outside surface and outer protection tube (6) inside surface; the gap only is 0.05mm, fills up the shockproof requirements that MgO powder (7) satisfies nuclear level instrument in armoring lead wire (3).
5. reduce the method for thermal response time according to the described nuclear grade platinum resistance thermometer of claim 3; it is characterized in that: the protective casing appearance is coated with wear-resisting, heat-resisting, sludge proof particulate metal coating (8), can not produce bonding because of oxidation corrosion between protective casing (5) and the outer protection tube (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006101178045A CN101173873A (en) | 2006-10-31 | 2006-10-31 | Nuclear grade platinum resistance thermometer and its method for reducing thermal response time |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006101178045A CN101173873A (en) | 2006-10-31 | 2006-10-31 | Nuclear grade platinum resistance thermometer and its method for reducing thermal response time |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101173873A true CN101173873A (en) | 2008-05-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNA2006101178045A Pending CN101173873A (en) | 2006-10-31 | 2006-10-31 | Nuclear grade platinum resistance thermometer and its method for reducing thermal response time |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102062643A (en) * | 2009-11-16 | 2011-05-18 | 上海岗崎控制仪表有限公司 | Wear-resistant quick temperature measuring platinum resistance thermometer |
| CN102062644A (en) * | 2009-11-16 | 2011-05-18 | 上海岗崎控制仪表有限公司 | Integrated variable-diameter pin type quick response platinum thermal resistor |
| CN103033281A (en) * | 2012-12-24 | 2013-04-10 | 重庆材料研究院 | Platinum resistance temperature sensor with high intensity and fast response |
| CN106225935A (en) * | 2016-08-28 | 2016-12-14 | 杭州河合电器股份有限公司 | A kind of novel temperature tube temperature sensor structure |
| CN106441617A (en) * | 2016-08-31 | 2017-02-22 | 宁波奥崎仪表成套设备有限公司 | Anti-vibration temperature measurement device |
| CN109916529A (en) * | 2019-02-26 | 2019-06-21 | 重庆材料研究院有限公司 | Platinum resistive element and preparation process for nuclear leve proof armored platinum resistor |
| CN110832291A (en) * | 2017-06-21 | 2020-02-21 | 恩德莱斯+豪瑟尔韦泽尔有限商业两合公司 | Thermometer with improved response time |
-
2006
- 2006-10-31 CN CNA2006101178045A patent/CN101173873A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102062643A (en) * | 2009-11-16 | 2011-05-18 | 上海岗崎控制仪表有限公司 | Wear-resistant quick temperature measuring platinum resistance thermometer |
| CN102062644A (en) * | 2009-11-16 | 2011-05-18 | 上海岗崎控制仪表有限公司 | Integrated variable-diameter pin type quick response platinum thermal resistor |
| CN103033281A (en) * | 2012-12-24 | 2013-04-10 | 重庆材料研究院 | Platinum resistance temperature sensor with high intensity and fast response |
| CN103033281B (en) * | 2012-12-24 | 2015-01-21 | 重庆材料研究院 | Platinum resistance temperature sensor with high intensity and fast response |
| CN106225935A (en) * | 2016-08-28 | 2016-12-14 | 杭州河合电器股份有限公司 | A kind of novel temperature tube temperature sensor structure |
| CN106441617A (en) * | 2016-08-31 | 2017-02-22 | 宁波奥崎仪表成套设备有限公司 | Anti-vibration temperature measurement device |
| CN110832291A (en) * | 2017-06-21 | 2020-02-21 | 恩德莱斯+豪瑟尔韦泽尔有限商业两合公司 | Thermometer with improved response time |
| US11480476B2 (en) | 2017-06-21 | 2022-10-25 | Endress+Hauser Wetzer Gmbh+Co. Kg | Thermometer with improved response time |
| CN109916529A (en) * | 2019-02-26 | 2019-06-21 | 重庆材料研究院有限公司 | Platinum resistive element and preparation process for nuclear leve proof armored platinum resistor |
| CN109916529B (en) * | 2019-02-26 | 2021-08-31 | 重庆材料研究院有限公司 | Platinum resistor element for nuclear-grade armored platinum resistor and preparation process |
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20080507 |