CN201038192Y - Sleeve structure thermocouple protection device - Google Patents
Sleeve structure thermocouple protection device Download PDFInfo
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- CN201038192Y CN201038192Y CNU2007200057575U CN200720005757U CN201038192Y CN 201038192 Y CN201038192 Y CN 201038192Y CN U2007200057575 U CNU2007200057575 U CN U2007200057575U CN 200720005757 U CN200720005757 U CN 200720005757U CN 201038192 Y CN201038192 Y CN 201038192Y
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- bushing
- alloy
- inner sleeve
- outer tube
- high temperature
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Abstract
A bushing thermocouple protection device comprises an outer bushing, which has inner screw thread in the inner pathway, and an inner bushing, which has outer screw thread to mesh the inner screw thread. An inner hole is opened in the center of the inner bushing. The outer bushing is made of GH3039 alloy; the inner bushing is made of 1Cr18Ni9Ti. The GH3090 alloy used by the outer bushing can guarantee good physical and chemical stability of the protection bushing at a high temperature; the cheap material used by the inner bushing can also meet the requirements for high temperature and intensity. Thus the cost of the entire protection bushing is greatly reduced, which has obvious technical effects.
Description
Technical field
The utility model relates to electric thermo-couple protector, particularly a kind of electric thermo-couple protector of sleeve structure.
Background technology
In the middle of industrial production, usually use temperature measuring equipment, be used for measuring the central working temperature of operational outfit, and come the operation of control system by the temperature that records.Such as in the power plant, must determine operating condition according to the size of power load such as steam turbin generator.And the temperature and pressure of the steam that the operating state of generator often is decided by steam boiler to be provided.In the middle of this, the temperature of correctly measuring boiler or combustion chamber is just extremely important.Usually, measure temperature and be to use thermocouple, such as common nickel chromium triangle thermocouple and platinum rhodium thermocouple.Deliver to control system by the thermo-electromotive force signal that these thermocouples produce, just can indicate the temperature of combustion chamber or boiler exactly.And control system just can be according to the measured temperature and the needs of network load, send the fired state that the combustion chamber is controlled in instruction conversely again, make the steam of generation can satisfy the needs of generating.
But these thermocouples all are a pair of thermocouple assembly that two very thin wires are formed usually, must have protection tube cover outside when in use, and secure fixation in addition, to prevent the damage of thermocouple assembly.
Common protection tube can be selected earthenware or metal tube for use.The advantage of earthenware be high temperature resistant, physical and chemical stability good, and is and relatively cheap.Yet the deadly defect of earthenware is poor because of its heat conductivility, and its reaction speed to variations in temperature is slow.For such application scenario, power plant, often require generating set can make instant reaction, otherwise voltage is low in the time of must causing electricity shortage, and during the untimely reduction of generating set output, causes the supply power voltage overrate again power load.These all are to the very disadvantageous thing of electricity consumer.Originally, the working temperature adjustment of combustion chamber and boiler needed the regular hour, if add the delay of response of measurement mechanism, will make above-mentioned voltage fluctuation problem even more serious.Therefore, the power plant adopts the protecting tube of metal usually, and does not adopt ceramic protecting pipe.
Obviously, the thermal conductivity of protection metal pipe is good, and the reaction speed of above-mentioned measurement temperature has obtained solution.But metal sleeve high temperature resistant, physical and chemical stability will be different with the difference of metal material.For the applied environment such in the power plant, particularly use under the situation that coal acts as a fuel, certainly lead to pernicious gases such as a large amount of sulphur, phosphorus, and these gases are very severe for corrosion of metal.Such as be the conventional stainless steel metal material of 1Cr18Ni9Ti very stable and that extensively be applied in the middle of daily life, if be used as the protective casing under the power plant service condition.Though the elevated temperature strength of 1Cr18Ni9Ti can meet the demands, but the physical and chemical stability under its high temperature still is not enough to resist effectively the abominable use occasion of the high temperature such in the power plant, high-sulfur, high phosphorus, with approximately can only working a week that 1Cr18Ni9Ti makes, will come off because of corrosion causes the layering of sleeve surface, so that damage.Not only cause the trouble that must frequently change, the increase of use cost, and in a single day do not have replacing protection tube in time, and damage thermocouple, even can cause power plant steam boiler running parameter inaccurate, operate danger out of control.
For this reason, industrial quarters has been used the material of the more good GH3039 alloy of performance as protective sleeve.This alloy has good high temperature resistant character, is that a few can be used in the high temperature about 1200 ℃ and can guarantee one of excellent material of good physical and chemical stability.This material can be resisted the abominable use occasion of high-sulfur under the high temperature, high phosphorus effectively.Usually, the protective sleeve that uses the GH3039 alloy to make, that is to say it is 30 times to 60 times of life-span of 1Cr18Ni9Ti protective sleeve at the half a year to one year of can working under the environment for use in power plant.Therefore, the GH3039 alloy becomes at present a kind of of under the power plant service condition material commonly used of protecting tube.
The protective casing material passes through the metal material that forges after can selecting casting or casting for use again.In order to make shell material that good high-temperature intensity at high temperature be arranged, the metal material of having to use the process of real core to forge is usually left the centre bore that holds thermocouple assembly subsequently.If use the hollow material of casting, though material can be saved, because the crystal grain of founding materials is big, the metal structure leakiness, elevated temperature strength is difficult to guarantee.Like this, the loss of material is just very big, if material is relatively more expensive, must cause the rising of cost.
Yet, the costing an arm and a leg of GH3039 alloy, such as being more than 10 times of 1Cr18Ni9Ti price, and protection tube has to provide the protection tube of adequate thickness in order to have guaranteed certain high temperature intensity, prevents from high temperature to occur fracture or distortion.Like this, the consumption of GH3039 alloy is just higher, makes the expense of material rise.
Summary of the invention
In order to solve the problem of above-mentioned existence, this practicality provides a kind of novel thermocouple sheath protection structure.According to protecting tube of the present utility model, can not only guarantee provides good physical and chemical stability under high temperature and high-sulfur, high phosphorus condition, and the manufacturing cost of protective sleeve is reduced.
According to protecting tube of the present utility model, it is included on its internal diameter the outer tube that forms internal thread, and has the externally threaded inner sleeve that the internal thread with above-mentioned outer tube is meshed, and has endoporus at the center of inner sleeve.
Described outer tube is made by the GH3039 alloy.
Described inner sleeve is made by 1Cr18Ni9Ti.
Described outer tube thickness is the 2-5 millimeter.
The thickness of described inner sleeve is the 4-10 millimeter.
According to protecting tube of the present utility model, its outer tube has used the GH3039 alloy, and can guarantee to have with the protective sleeve that uses the GH3039 alloy as sleeve pipe fully has physical and chemical stability under the identical high temperature resistant and good high-temperature; And inner sleeve has used low-cost 1Cr18Ni9Ti, and its elevated temperature strength can satisfy job requirement.But because this a part of material substitution expensive GH3039 alloy, make the manufacturing cost of whole protecting cover descend greatly than the protective sleeve cost that uses the GH3039 alloy fully, obtained tangible technique effect.
Description of drawings
Fig. 1 has shown the structure chart of protecting tube of the present utility model.
Embodiment
As shown in Figure 1, the outer tube of 11 hollows of making for the GH3039 alloy, its internal diameter has internal thread.The thickness of sleeve pipe is at the 2-5 millimeter, can decide thickness according to temperature conditions and the environment for use used, if temperature is higher, and when the content of sulphur and phosphorus is higher in the middle of the environment for use, selects thicker outer tube usually for use.Can select for use such as the thickness that is 3 millimeters generally speaking.
The inner sleeve of 12 hollows of making for 1Cr18Ni9Ti, its external diameter has external screw thread, and and the internal thread of outer tube 11 be meshed.The center of inner sleeve 12 has hole 13, is used for holding and the stationary heat galvanic couple.The thickness of inner sleeve is the 4-10 millimeter.Can select for use such as the thickness that is 5 millimeters generally speaking.Decide thickness according to the temperature conditions that uses,, select thicker inner sleeve usually for use if temperature is higher.
The diameter of the centre bore 13 of inner sleeve 12 is decided by the diameter of thermocouple assembly, and the diameter of outer tube is then determined by the diameter of inner sleeve.
Select for use 1Cr18Ni9Ti as the reason of inner sleeve material to be, the thermal coefficient of expansion of 1Cr18Ni9Ti and GH3039 are comparatively approaching, and fusing point is higher, and physical and chemical stability under the good relatively high temperature is arranged.If adopt other more common metal material, on cost, reduce and few, and and GH3039 match that physical and chemical stability can not reach requirement under performance and the high temperature.
Through the 1Cr18Ni9Ti that forges,, the elevated temperature strength of protective sleeve is guaranteed because enough thickness is arranged.Though it is the perforate meeting causes the loss of material, because the relative low price of 1Cr18Ni9Ti, still much lower than using the GH3039 alloy fully and in the middle of alloy, getting the cost of endoporus.
As the GH3039 alloy of outer tube, can use casting method to realize.Spillage of material is minimum like this, and the elevated temperature strength of protective sleeve mainly relies on inner sleeve to guarantee.
The description of above-mentioned specification embodiment does not constitute the restriction to the utility model protection range, and any modification or change of making according to basic design of the present utility model all do not exceed protection range of the present utility model.
Claims (7)
1. the electric thermo-couple protector of a sleeve structure is characterized in that, it is included on its internal diameter the outer tube that forms internal thread, and has the externally threaded inner sleeve that the internal thread with above-mentioned outer tube is meshed, and has endoporus at the center of inner sleeve.
2. an electric thermo-couple protector as claimed in claim 1 is characterized in that, described outer tube is made by the GH3039 alloy.
3. an electric thermo-couple protector as claimed in claim 1 is characterized in that, described inner sleeve is made by 1Cr18Ni9Ti.
4. the electric thermo-couple protector as claim 1 or 2 is characterized in that, described outer tube thickness is the 2-5 millimeter.
5. the electric thermo-couple protector as claim 1 or 2 is characterized in that, described outer tube thickness is 3 millimeters.
6. the electric thermo-couple protector as claim 1 or 3 is characterized in that, the thickness of described inner sleeve is the 4-10 millimeter.
7. the electric thermo-couple protector as claim 1 or 3 is characterized in that, the thickness of described inner sleeve is 5 millimeters.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200057575U CN201038192Y (en) | 2007-02-17 | 2007-02-17 | Sleeve structure thermocouple protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200057575U CN201038192Y (en) | 2007-02-17 | 2007-02-17 | Sleeve structure thermocouple protection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201038192Y true CN201038192Y (en) | 2008-03-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200057575U Expired - Fee Related CN201038192Y (en) | 2007-02-17 | 2007-02-17 | Sleeve structure thermocouple protection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201038192Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102337414A (en) * | 2011-07-07 | 2012-02-01 | 大亚科技股份有限公司 | Degassing machine temperature monitoring device |
| CN103180985A (en) * | 2010-03-31 | 2013-06-26 | 剑桥企业有限公司 | Thermocouple apparatus and method |
-
2007
- 2007-02-17 CN CNU2007200057575U patent/CN201038192Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103180985A (en) * | 2010-03-31 | 2013-06-26 | 剑桥企业有限公司 | Thermocouple apparatus and method |
| US9702764B2 (en) | 2010-03-31 | 2017-07-11 | Cambridge Enterprise Limited | Thermocouple apparatus and method |
| CN103180985B (en) * | 2010-03-31 | 2017-09-19 | 剑桥企业有限公司 | Thermocouple assembly and method |
| US10168228B2 (en) | 2010-03-31 | 2019-01-01 | Cambridge Enterprise Limited | Thermocouple apparatus and method |
| CN102337414A (en) * | 2011-07-07 | 2012-02-01 | 大亚科技股份有限公司 | Degassing machine temperature monitoring device |
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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 YICHU INDUSTRY CO., LTD. Free format text: FORMER OWNER: ZHANG QIAOLIN Effective date: 20110927 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 453000 XINXIANG, HENAN PROVINCE TO: 200125 PUDONG NEW AREA, SHANGHAI |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20110927 Address after: 200125 No. 1881, Lane 42, Dongfang Road, Shanghai, Pudong New Area 2103 Patentee after: Shanghai Yi Chu Industrial Co. Ltd. Address before: 453000, No. 125, Tong Nan Street, Weibin District, Henan, Xinxiang, No. 13 Patentee before: Zhang Qiaolin |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080319 Termination date: 20120217 |