CN200972417Y - Nut small inertia thermal cover platinum resistance thermometer - Google Patents
Nut small inertia thermal cover platinum resistance thermometer Download PDFInfo
- Publication number
- CN200972417Y CN200972417Y CN 200620047339 CN200620047339U CN200972417Y CN 200972417 Y CN200972417 Y CN 200972417Y CN 200620047339 CN200620047339 CN 200620047339 CN 200620047339 U CN200620047339 U CN 200620047339U CN 200972417 Y CN200972417 Y CN 200972417Y
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- CN
- China
- Prior art keywords
- protective casing
- platinum resistance
- platinum
- resistance thermometer
- thermometer
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- 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.)
- Expired - Fee Related
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- Monitoring And Testing Of Nuclear Reactors (AREA)
- Measuring Temperature Or Quantity Of Heat (AREA)
Abstract
The utility model relates to a nuclear class inert armored platinum resistance thermometer, which comprises a junction box and a protective casing with platinum resistance units inside. The thermometer is characterized in that the temperature-sensing surfaces of The platinum resistance units are closely attached to the inner surface of protective casing; and the outer surface of protective casing is closely attached to the inner surface of external protective tube; The platinum resistance units are connected to armored lead wires by weld, and magnesia powder is filled among armored lead wires. The temperature-sensing surfaces of platinum resistance units are closely attached to the protective casing, and the protective casing is closely attached to the external protective tube, both of which improve the thermal conductivity, reduce the thermal response time of platinum resistance thermometer and meet the shockproof requirement; the surface of protective casing is coated special metallic coating material which resists wear, heat and oxidation. The protective casing and external protective tube cannot be bonded resulting from oxidation corrosion, so changing armored platinum resistance units is convenient.
Description
Technical field
The utility model belongs to the temperature measuring instrument technical field, is specifically related to the architecture advances of little inertia thermal sleeve platinum-resistance thermometer.
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≤ 2.4s.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; and the thermal conductivity of MgO powder own is poor again, makes the platinum-resistance thermometer thermal response time grow (thermal inertia is bigger) τ
0.632〉=8s, obviously, conventional platinum-resistance thermometer can not satisfy the nuclear power demand.
The utility model content
The purpose of this utility model is: a kind of harsh working condition of nuclear power station, little inertia platinum-resistance thermometer of nuclear level thermal sleeve that high safety is reliable, thermal inertia is little of being applicable to is provided.
The technical scheme of Cai Yonging is for achieving the above object: the little inertia thermal sleeve platinum-resistance thermometer of nuclear level, comprise: the protective casing of terminal box, built-in platinum resistance element is characterized in that: the inside surface of described platinum resistance element temperature-sensitive face and protective casing fits tightly; The outside surface of 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.
The gap is 0.10mm between described platinum resistance element and protective casing inside surface.The gap only is 0.05mm between the inside surface of described protective casing outside surface and outer protection tube.Described protective casing outside surface is equipped with metallic coating.
Good effect of the present utility model 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; Platinum resistance element and protective casing gap are very little only to be 0.10mm, has satisfied shockproof requirements; Wear-resisting, heat-resisting, sludge proof particulate metal coating that the protective casing appearance is coated with can be because of oxidation corrosion produce bonding between protective casing and the outer protection tube, and it is convenient to change armouring platinum resistance component element.
Description of drawings
Below in conjunction with drawings and Examples to being described further.
Fig. 1 the utility model structural representation;
Fig. 2 the utility model detects end structure for amplifying synoptic diagram.
Among the figure, the 1-terminal box; The 2-armoring lead wire; 3-platinum resistance element; The 4-protective casing; The outer protection tube of 5-; The 6-MgO powder; The 7-coating.
Embodiment
The little inertia thermal sleeve platinum-resistance thermometer of nuclear level, comprising: the protective casing 4 of terminal box 1, built-in platinum resistance element 3 is characterized in that: the inside surface of described platinum resistance element 3 temperature-sensitive faces and protective casing 4 fits tightly; Described protective casing) outside surface fits tightly with outer protection tube 5 inside surfaces; Described platinum resistance element 3 is welded to connect with armoring lead wire 2, fills MgO powder 6 between lead-in wire.
The gap is 0.10mm between described platinum resistance element 3 and protective casing 4 inside surfaces.Closely cooperate between protective casing 4 outside surfaces and outer protection tube 5 inside surfaces, the gap is 0.05mm.Described protective casing 4 outside surfaces are coated with wear-resisting, heat-resisting, sludge proof metallic coating 7.
Claims (4)
1. examine the little inertia thermal sleeve platinum-resistance thermometer of level, comprising: the protective casing (4) of terminal box (1), built-in platinum resistance element (3) is characterized in that: the inside surface of described platinum resistance element (3) temperature-sensitive face and protective casing (4) fits tightly; The outside surface of described protective casing (4) fits tightly with outer protection tube (5) inside surface; Described platinum resistance element (3) is welded to connect with armoring lead wire (2), fills MgO powder (6) between lead-in wire.
2. according to the little inertia thermal sleeve platinum-resistance thermometer of the described nuclear level of claim 1, it is characterized in that: the gap is 0.10mm between described platinum resistance element (3) and protective casing (4) inside surface.
3. according to the little inertia thermal sleeve platinum-resistance thermometer of the described nuclear level of claim 1, it is characterized in that: the gap is 0.05mm between described protective casing (4) outside surface and outer protection tube (5) inside surface.
4. according to the little inertia thermal sleeve platinum-resistance thermometer of the described nuclear level of claim 1, it is characterized in that: described protective casing (4) outside surface is coated with wear-resisting, heat-resisting, sludge proof metallic coating (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620047339 CN200972417Y (en) | 2006-10-31 | 2006-10-31 | Nut small inertia thermal cover platinum resistance thermometer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620047339 CN200972417Y (en) | 2006-10-31 | 2006-10-31 | Nut small inertia thermal cover platinum resistance thermometer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN200972417Y true CN200972417Y (en) | 2007-11-07 |
Family
ID=38883672
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620047339 Expired - Fee Related CN200972417Y (en) | 2006-10-31 | 2006-10-31 | Nut small inertia thermal cover platinum resistance thermometer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN200972417Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107887041A (en) * | 2017-11-07 | 2018-04-06 | 深圳中广核工程设计有限公司 | Nuclear power plant main pipeline temperature measuring equipment |
-
2006
- 2006-10-31 CN CN 200620047339 patent/CN200972417Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107887041A (en) * | 2017-11-07 | 2018-04-06 | 深圳中广核工程设计有限公司 | Nuclear power plant main pipeline temperature measuring equipment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: SHANGHAI AUTOMATION INSTRUMENTATION CO., LTD. Free format text: FORMER OWNER: SHANGHAI AUTOMATIC INDUSTRUMENT AND METER CO LTD Effective date: 20150611 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20150611 Address after: Zhabei District Shanghai City 200072 West Guangzhong Road No. 191 Building No. 7 Patentee after: Shanghai instrument and meter for automation company limited Address before: 200233, No. 41 Rainbow Road, Shanghai, Xuhui District Patentee before: Shanghai Automatic Industrument and Meter Co., Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20071107 Termination date: 20151031 |
|
| EXPY | Termination of patent right or utility model |