CN201392245Y - High-temperature wear-resistant thermocouple special for circulating fluidized beds - Google Patents
High-temperature wear-resistant thermocouple special for circulating fluidized beds Download PDFInfo
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- CN201392245Y CN201392245Y CN200920113776U CN200920113776U CN201392245Y CN 201392245 Y CN201392245 Y CN 201392245Y CN 200920113776 U CN200920113776 U CN 200920113776U CN 200920113776 U CN200920113776 U CN 200920113776U CN 201392245 Y CN201392245 Y CN 201392245Y
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Abstract
A high-temperature wear-resistant thermocouple special for circulating fluidized beds relates to a thermocouple and comprises a high-pressure flange, a thermocouple element and an outer protective tube. The thermocouple is characterized in that the outer protective tube draws materials piecewise and is formed by welding a temperature sensitive front half section and a rear half section, the temperature sensitive front half section is made of high-temperature alloy parent materials while the rear half section utilizes medium-temperature high-strength alloy materials, the diameter of an inner bore of the outer protective tube is smaller than 8.0 mm, the length thereof is equal to or smaller than 500mm, the concentricity keeps 0.15%, and the temperature sensitive front half section of the outer protective tube is covered with a wear-resistant layer. Because properties of the combined high-temperature alloy protective tube meet requirements of high-temperature abrasion resistance and high-temperature sulfur and H2S corrosion resistance, not only can difficult problems of noble-metal thermocouples of circulating fluidized bed boilers, Co furnace and the like be resolved successfully, but mounting and transporting of the thermocouples can be guaranteed reliably.
Description
Technical field:
The utility model relates to a kind of thermopair that relates to, and refers in particular under high temperature, hyperbaric environment, and high strength, high tenacity, corrosion-resistant, high wear-resistant special electric thermo-couple are still arranged.
Background technology:
Circulating Fluidized Bed Boiler (being called for short the CFB boiler), coal cinder is 1100 ℃ of upper and lower Boiling Combustions of left and right sides temperature in the burner hearth, and owing to coal cinder inferior, grain, slag, ash seethe up and down repeatedly, mill sassafras coefficient is very big.Temperature is depended merely on thermocouple measurement in the stove, requires protecting tube under 1100 ℃ of temperature, still has high strength, high tenacity, corrosion-resistant, height to resistance to wear.Common austenitic stainless steel can only be measured not connecing under the true medium situation, but can not reach correct actual temperature in the burner hearth, the common abrasion resistant thermocouple operating period is at present generally all about three months, not satisfying the production run requirement, also is to belong to one of higher environment of current thermo-power station Circulating Fluidized Bed Boiler difficulty.
Summary of the invention:
The utility model provides a kind of wear-resisting circulating fluid-bed special electric thermo-couple of high temperature resistance that has solved a thermopair difficult problem in the boiler hearth of circulating fluidized bed.
The utility model is achieved by the following technical solution: the wear-resisting circulating fluid-bed special electric thermo-couple of a kind of high temperature resistance, comprise high pressure flange, thermocouple element, outer protection tube, its major technique feature is that described outer protection tube segmentation is drawn materials, temperature-sensitive preceding half section and second half section are welded, temperature-sensitive adopts the high temperature alloy fertile material for preceding half section, warm high-strength alloy material during the second half section employing is anti-;
Described outer protection tube diameter of bore is less than 8.0mm, length≤500mm, and concentricity keeps 0.15 ‰;
Described outer protection tube temperature-sensitive is provided with wearing layer outward for preceding half section, and wearing layer is formed by nickel, chromium, niobium, tungsten carbide, nano ceramics mixing remelting;
Described wearing layer thickness is 1.5-2.0mm;
Described wearing layer length is 300mm.
The utility model is because combined high temperature alloy protection tube performance has reached high temperature wear resistant and high temperature resistant sulphur and H
2The requirement of S corrosion has not only successfully solved noble-metal thermocouple long-standing problems such as Circulating Fluidized Bed Boiler, Co stove; And the installation and the transportation of thermopair obtained reliable assurance.Maximum efficiency still because the structure of protecting tube makes thermocouple element be not limited to expensive platinum rhodium, can adopt cheap W-Re or N type thermopair, reduces expenses greatly, reduces production costs for enterprise, enhances productivity.
Description of drawings:
Fig. 1 is a structural representation of the present utility model.
Embodiment:
As shown in Figure 1, the wear-resisting circulating fluid-bed special electric thermo-couple of a kind of high temperature resistance, comprise high pressure flange 1, thermocouple element 2, outer protection tube 3, outer protection tube divides preceding half section 3-1 of temperature-sensitive and second half section 3-2 to be welded, temperature-sensitive adopts the high temperature alloy fertile material for preceding half section, warm high-strength alloy material during the second half section employing is anti-; Outer protection tube diameter of bore is less than 8.0mm, length 500mm, and concentricity keeps 0.15 ‰; Preceding half segment length of outer protection tube temperature-sensitive is that 300mm is provided with wearing layer 4.
The utility model makes the protection tube parent by high-temperature alloy material and wearing layer is made with the combination of metal surface modification disposal route.The outer protection tube of thermopair adopts segmentation to draw materials, the temperature-sensitive first half adopts can reach a high temperature down high strength, high-ductility alloy fertile material, warm high-strength alloy material during the second half section employing is anti-, preceding half section parent rod iron model forging forming, whole boring intensity height has reduced the cost of products price again, diameter of bore is less than 8.0mm, length≤500mm, concentricity keeps 0.15 ‰, cooperates closely between element and the sleeve pipe, and the space is few, heat conductance is good; At the metallurgical remelting nickel of the wear-resisting section surface of preceding half segment protect pipe parent hot junction L=300mm, chromium, niobium, tungsten carbide, ceramic wearing coat, anti-sulphur, H
2Corrosivity such as S, HRC55 ℃ of 700 ℃ of temperature hardness.Thermocouple element adopts the armouring insulation; Improved the antidetonation premium properties of element.
The Circulating Fluidized Bed Boiler special electric thermo-couple is characterised in that high temperature alloy protection tube surface prefabricated spraying one deck nickel, chromium, niobium, tungsten carbide, nano ceramics wearing layer earlier, after Co
21.5-2.0 thickness high temperature wear resistant corrosion protection layer is made in the laser instrument remelting.The Circulating Fluidized Bed Boiler special electric thermo-couple has solved protecting tube and has used problem for a long time, and thermocouple element is not limited to expensive platinum rhodium, can adopt cheap W-Re or N type thermopair, and cost has only 30% of import thermopair.
The material of protecting tube reaches under 1100 ℃ of left and right sides temperature, and high temperature resistant, high strength, high tenacity are still arranged; Corrosion-resistant, height resistance to wears, and effect is very obvious, has solved a thermopair difficult problem in the boiler hearth of circulating fluidized bed.
Claims (5)
1, the wear-resisting circulating fluid-bed special electric thermo-couple of a kind of high temperature resistance; comprise high pressure flange, thermocouple element, outer protection tube; it is characterized in that described outer protection tube segmentation draws materials; temperature-sensitive preceding half section and second half section are welded; temperature-sensitive adopts the high temperature alloy fertile material for preceding half section, warm high-strength alloy material during the second half section employing is anti-.
2, the wear-resisting circulating fluid-bed special electric thermo-couple of a kind of high temperature resistance as claimed in claim 1 is characterized in that described outer protection tube diameter of bore less than 8.0mm, length≤500mm, and concentricity keeps 0.15 ‰.
3, the wear-resisting circulating fluid-bed special electric thermo-couple of a kind of high temperature resistance as claimed in claim 1 is characterized in that described outer protection tube temperature-sensitive is provided with wearing layer outward for preceding half section, and the wearing layer remelting forms.
4, the wear-resisting circulating fluid-bed special electric thermo-couple of a kind of high temperature resistance as claimed in claim 3 is characterized in that described wearing layer thickness is 1.5-2.0mm.
5, the wear-resisting circulating fluid-bed special electric thermo-couple of a kind of high temperature resistance as claimed in claim 3 is characterized in that described wearing layer length is 300mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920113776U CN201392245Y (en) | 2009-02-12 | 2009-02-12 | High-temperature wear-resistant thermocouple special for circulating fluidized beds |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920113776U CN201392245Y (en) | 2009-02-12 | 2009-02-12 | High-temperature wear-resistant thermocouple special for circulating fluidized beds |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201392245Y true CN201392245Y (en) | 2010-01-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN200920113776U Expired - Fee Related CN201392245Y (en) | 2009-02-12 | 2009-02-12 | High-temperature wear-resistant thermocouple special for circulating fluidized beds |
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| CN (1) | CN201392245Y (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101846557A (en) * | 2010-05-18 | 2010-09-29 | 丁锡端 | Special thermoelectric couple for high-temperature hydrogen sulfide corrosion-resistant sulphur incinerator and manufacture method thereof |
| CN103604522A (en) * | 2013-11-20 | 2014-02-26 | 南京宝色股份公司 | Pressure vessel enhanced vibration resistance thermocouple sleeve |
| CN105018983A (en) * | 2015-06-26 | 2015-11-04 | 安徽西得仪表科技有限公司 | Nanometer composite electroplating type temperature-resistant and wear-resistant thermocouple protection tube and preparation method thereof |
| CN106197716A (en) * | 2016-08-31 | 2016-12-07 | 大工（青岛）新能源材料技术研究院有限公司 | Pillar stagewise thermocouple and assemble method thereof |
| CN106679835A (en) * | 2016-12-08 | 2017-05-17 | 苏州长风航空电子有限公司 | Armored thermocouple sensor |
| CN108484169A (en) * | 2018-03-26 | 2018-09-04 | 甘肃新西北碳素科技有限公司 | Carbon/carbon material protective cover for thermocouple production method for aluminium melting furnace |
| CN112161719A (en) * | 2020-09-29 | 2021-01-01 | 无锡华光环保能源集团股份有限公司 | Mounting structure of bed temperature thermocouple of circulating fluidized bed boiler |
-
2009
- 2009-02-12 CN CN200920113776U patent/CN201392245Y/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101846557A (en) * | 2010-05-18 | 2010-09-29 | 丁锡端 | Special thermoelectric couple for high-temperature hydrogen sulfide corrosion-resistant sulphur incinerator and manufacture method thereof |
| CN103604522A (en) * | 2013-11-20 | 2014-02-26 | 南京宝色股份公司 | Pressure vessel enhanced vibration resistance thermocouple sleeve |
| CN105018983A (en) * | 2015-06-26 | 2015-11-04 | 安徽西得仪表科技有限公司 | Nanometer composite electroplating type temperature-resistant and wear-resistant thermocouple protection tube and preparation method thereof |
| CN105018983B (en) * | 2015-06-26 | 2018-03-20 | 安徽西得仪表科技有限公司 | A kind of nano compound electroplating type heat-resistant, wear-resistant protecting tube and preparation method thereof |
| CN106197716A (en) * | 2016-08-31 | 2016-12-07 | 大工（青岛）新能源材料技术研究院有限公司 | Pillar stagewise thermocouple and assemble method thereof |
| CN106679835A (en) * | 2016-12-08 | 2017-05-17 | 苏州长风航空电子有限公司 | Armored thermocouple sensor |
| CN106679835B (en) * | 2016-12-08 | 2019-05-24 | 苏州长风航空电子有限公司 | A kind of armored thermocouple sensor |
| CN108484169A (en) * | 2018-03-26 | 2018-09-04 | 甘肃新西北碳素科技有限公司 | Carbon/carbon material protective cover for thermocouple production method for aluminium melting furnace |
| CN112161719A (en) * | 2020-09-29 | 2021-01-01 | 无锡华光环保能源集团股份有限公司 | Mounting structure of bed temperature thermocouple of circulating fluidized bed boiler |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100127 Termination date: 20110212 |