CN103033281A - Platinum resistance temperature sensor with high intensity and fast response - Google Patents
Platinum resistance temperature sensor with high intensity and fast response Download PDFInfo
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- CN103033281A CN103033281A CN2012105652943A CN201210565294A CN103033281A CN 103033281 A CN103033281 A CN 103033281A CN 2012105652943 A CN2012105652943 A CN 2012105652943A CN 201210565294 A CN201210565294 A CN 201210565294A CN 103033281 A CN103033281 A CN 103033281A
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Abstract
The invention relates to a platinum resistance temperature sensor with high intensity and fast response. A temperature-sensing element is installed at a small diameter part of a reducing temperature-sensing drivepipe, and insulating materials are filled up between the back end of the temperature-sensing element and the temperature-sensing drivepipe. An inner protective tube is provided with a sheathed signal cable leading wire, and the sheath signal cable leading wire is connected with the temperature-sensing element. The temperature-sensing drivepipe and the inner protective tube are welded together and form a thermometer core, and a sealed tube is welded with the thermometer. A bottom hole is formed in the bottom of a small diameter part of a conical outer protective tube, three groups of diversion holes dividing the circumference equally are formed in the small diameter part of the conical outer protective tube in a radical direction, each group of diversion holes are provided with a plurality of diversion holes along an axial direction, and the rear end of the outer protective tube is in threaded connection with a base of a media fluid channel. The inner cavity of the inner protective tube fits with the inner cavity of the outer protective tube, the inner protective tube and the outer protective tube are connected and sealed with a Swagelok, and the Swagelok body is welded with the outer protective tube. The platinum resistance temperature sensor fits in with the special requirements of high temperature, high pressure and high speed media fluid, and possesses fast thermal response.
Description
Technical field
The present invention relates to a kind of thermometric instruments, particularly a kind of high strength, fast-response platinum resistance temperature sensor.
Background technology
Platinum resistance temperature sensor is to utilize its resistance to become certain funtcional relationship with temperature and the temperature sensor made, the platinum-resistance thermometer thermal response time refers to that when temperature jump changes the resistance change of a thermometer is the required time of number percent of certain regulation of this step variation extremely quite.Usually use τ
0.9, τ
0.632And τ
0.5Deng expression, refer to respectively to reach temperature variation 90%, the retardation time 63.2% and 50% time.Response time is the important sign of thermometer sensitivity.With the temperature sensor after the encapsulation of ceramic platinum resistance sensitive element, because its structure is different, the sensor response time has very large difference.
Some power station platinum-resistance thermometers; to provide temperature signal for power station power control system, protection system and Thermal Control System; high requirement is being arranged aspect security, reliability, stability, integrality and the quality assurance; not only require temperature signal is made fast and accurately reaction; and can bear the ability that media environment high temperature, high pressure and medium wash away at a high speed; have long service life (40～60 years), and the ability of anti-suitable earthquake intensity earthquake.
The long-pending scale-up factor that can be considered the response time in cylindricality temperature detecting resistance thermometer middle section, traditional thermometer can not satisfy should thermal response time fast, can keep again the intensity of thermometer, bear the technical requirement that medium high temperature, high pressure and high-velocity fluid wash away.
Summary of the invention
The purpose of this invention is to provide a kind of high strength, fast-response platinum resistance temperature sensor, this sensor adapts to high temperature, high pressure and the special working condition requirement of high speed medium fluid in power station, and thermal response time is fast.
Technical scheme of the present invention is:
A kind of high strength, fast-response platinum resistance temperature sensor, temperature-sensing element is installed in the path section in the reducing temperature-sensing sleeve, the gap-fill of temperature-sensing element and temperature-sensing sleeve has insulating material, armouring signal cable lead-in wire is housed in the interior protection tube, armouring signal cable lead-in wire is connected with temperature-sensing element, temperature-sensing sleeve and the welding of interior protection tube form the thermometer core body, sealed tube and the welding of thermometer core body; The bottom of taper outside protective pipe miner diameter end is provided with bottom outlet, taper outside protective pipe path section is disposed radially three groups of pod apertures of dividing circumference equally, each group is distributed with several pod apertures vertically, and the rear end of outside protective pipe and medium fluid pipeline base thread are tightly connected; Interior protection tube and outside protective pipe inner chamber are fitted, and interior protection tube and outside protective pipe seal with the Swagelok clamping sleeve blow-out patch, clamping sleeve blow-out patch body and outside protective pipe welding.
The pod apertures that described each group distributes vertically is 4, and its sectional area summation equates with the sectional area of bottom outlet.
Described temperature-sensing element is column ceramic platinum resistance element.
Described temperature-sensing sleeve adopts high-intensity stainless steel material to make.
Being filled with insulating material between temperature-sensing element and the temperature-sensing sleeve is MgO or Al
2O
3Or BeO.
Front card, the sealing of rear card two clips Swagelok clamping sleeve blow-out patch are adopted in described sealing.
A described sealed tube part is positioned at outside protective pipe, and another part stretches out outside protective pipe.
The invention solves power station high temperature (400 ℃), high pressure (17～26.5MPa), (4～5m/s) media environment thermometric problems at a high speed, platinum resistance temperature sensor of the present invention has good stability, intensity is high, and the advantage of long service life is for pioneering both at home and abroad.
Advantage of the present invention is:
1. adopt the sealing of Swagelok clamping sleeve blow-out patch, the signal of thermometer is drawn connector or the terminal box mode of adopting, installation, easy to maintenance;
2. thermal response time is fast, reaches τ
0.632≤ 1.5s;
3. can bear high temperature and reach 400 ℃;
4. can bear high pressure and reach 17～26.5MPa;
5. can bear washing away of high speed medium fluid, velocity of medium 4-5m/s;
6. can tolerate the oscillation intensity of 30g acceleration of gravity, and satisfy earthquake SSE requirement;
7. reach 40～60 years serviceable life.
Platinum resistance temperature sensor of the present invention is applied to power station or similar mediums environment, be adapted to high temperature, high pressure, and can bear the working environment that certain earthquake intensity earthquake is washed away and tolerated to the high speed medium fluid, have the advantage that thermal response time is fast, intensity is high, precision is high.
Description of drawings
Fig. 1 is the structural representation of platinum resistance temperature sensor of the present invention;
Fig. 2 is the synoptic diagram of thermometer core;
Fig. 3 is outside protective pipe, Swagelok clamping sleeve blow-out patch assembling synoptic diagram;
Fig. 4 is the pod apertures synoptic diagram that taper outside protective pipe path section is disposed radially.
1 is outside protective pipe among the figure, and 2 is temperature-sensing element, and 3 is temperature-sensing sleeve; 4 is interior protection tube, and 5 is the Swagelok clamping sleeve blow-out patch, and 6 is sealed tube; 7 is plug-in unit or terminal box, and 8 is cable tail, and 9 is insulating material; 10 is bottom outlet; 11 is pod apertures, and 12 is front card, and 13 is rear card; 14 is nut, and 15 is the clamping sleeve blow-out patch body.
Embodiment
Referring to Fig. 1-Fig. 4.High strength, fast-response platinum resistance temperature sensor comprise temperature-sensing element, temperature-sensing sleeve, interior protection tube and outside protective pipe.Temperature-sensing element 2 is installed in the path section in the reducing temperature-sensing sleeve 3, and the wall thickness at path place is thin as much as possible in the situation of proof strength, to improve thermal conduction capability, reduces the thermal response time of thermometer.Gap-fill between temperature-sensing element and the temperature-sensing sleeve has insulating material 9, and insulating material is MgO or Al
2O
3Or BeO, insulating material is closely knit as much as possible between temperature-sensing element and the temperature-sensing sleeve, to improve thermal conduction capability, reduces the thermal response time of thermometer.The present embodiment temperature-sensing element is column ceramic platinum resistance element, and temperature-sensing sleeve adopts high-intensity stainless steel material to make.Temperature-sensing element is column ceramic platinum resistance element, it can be unit piece, also can be dual-element, temperature-sensing sleeve adopts high-intensity stainless steel material (such as Inconel625), can improve the ability of anti-high pressure under the thermometer hot conditions and improve the ability that anti-high speed medium fluid is washed away.Fill Mgo (or Al between temperature-sensing element and the temperature-sensing sleeve inside surface
2O
3, BeO etc.) insulating material,
Armouring signal cable lead-in wire 8 is housed in the interior protection tube, and armouring signal cable lead-in wire is connected with temperature-sensing element, and temperature-sensing sleeve and the welding of interior protection tube form the thermometer core body, and go between available connector or terminal box 7 connection realization signals of armouring signal cable are exported.Interior protection tube and temperature-sensing sleeve welding separate temperature-sensing element, insulating material and armoring lead wire and medium, thereby reach insulating effect.Thermometer core body sheathcoat has outside protective pipe, forms the double shielding tubular construction, and outside protective pipe can be protected the thermometer core body, and the little path position of temperature-sensing sleeve of temperature-sensing element particularly is installed, and reduces high speed medium fluid washing away temperature-sensing sleeve.The rear end of outside protective pipe is connected with medium fluid pipeline base thread, and interior protection tube and outside protective pipe inner chamber are fitted.
Outside protective pipe is pyramidal structure, and is better than column structure erosion resistibility, and the wall thickness of outside protective pipe is can design as required to guarantee that it has enough rigidity.Outside protective pipe and medium fluid pipeline pedestal are tightly connected, and outside protective pipe and pedestal adopt welded seal or gasket seal.The bottom of taper outside protective pipe miner diameter end is provided with bottom outlet 10, and the outside protective pipe inner chamber is communicated with medium fluid.Taper outside protective pipe path section is disposed radially three groups of pod apertures 11 of dividing circumference equally, and each group is distributed with several pod apertures vertically, and the present embodiment pod apertures is 4, and its sectional area summation equates with the sectional area of bottom outlet, i.e. D=4d.Can guarantee that temperature-sensing sleeve directly is in the media environment, realize improving better the thermal response time of thermometer.Three groups of pod apertures can guarantee that no matter the installation of outside protective pipe installation screw thread is tightened on the pipeline pedestal where, water conservancy diversion aperture that the long-pending summation of projecting section equates with outside protective pipe bottom outlet area can both be arranged facing to coming flow path direction, make medium fluid flow to temperature-sensing sleeve by aperture along the medium fluid flow direction, and flow out from the outside protective pipe bottom outlet, make the dynamic temperature of the better induction medium environment of sensor, reduce the thermal response time of sensor, reach the effect of fast-response, and the thermal response time of sensor is proportional with the speed of medium fluid, flow velocity is larger, and thermal response time is faster; On the other hand according to fluid mechanics aperture (gap) loss principle; the high speed medium fluid flows through the outside protective pipe aperture; greatly reduce the rate of flow of fluid flow to temperature-sensing sleeve, what reduced that temperature-sensing sleeve is subject to washes away, so that sensor has the ability that anti-medium fluid is washed away at a high speed.
Sealed tube 6 and the welding of thermometer core body, a sealed tube part is positioned at outside protective pipe, and another part stretches out outside protective pipe. Interior protection tube 4 and 5 sealings of outside protective pipe 1 usefulness Swagelok clamping sleeve blow-out patch.To guarantee that bottom opening and side are provided with the sealing of outside protective pipe and the interior outside protective pipe of water conservancy diversion aperture.Clamping sleeve blow-out patch body 15 and outside protective pipe welding, the sealing effectiveness of Swagelok clamping sleeve blow-out patch under high temperature, high pressure is very good, can torque transfer to sealed tube, namely not install without moment of torsion during installation; The Swagelok clamping sleeve blow-out patch adopts front card 12, rear card 13 double card seal form, during rotating nut 14, rear card advances front card radially to apply an effective cutting ferrule pipe promptly vertically, sealed tube produces a plastic yield, front card is formed and the clamping sleeve blow-out patch body between sealing and the sealing of sealed tube external diameter.
The fundamental technical specifications of sensor of the present invention:
Temperature-measuring range: 0～400 ℃
Nominal resistance value: R
0=100 Ω (* 2),
Medium working flow rate: 4～5m/s
Medium designs pressure: 17.5MPa
Adopt high strength of the present invention, fast-response platinum resistance temperature sensor, carried out thermal response time test, pressure test, vibration test, seismic test etc., test method and result are as shown in the table:
In addition, the inside and outside protection tube of thermometer has been carried out Stren gsth test, high strength of the present invention, fast-response platinum resistance temperature sensor satisfy velocity of medium 4～5m/s, pressure 17.5MPa conditional request.
Conclusion:High strength of the present invention, fast-response platinum resistance temperature sensor have intensity height, good stability, fast (τ of response time
0.632＜1.5s) characteristics can adapt to the fast-response temperature control requirement such as the high temperature such as power station, high pressure and high-velocity fluid medium operating mode.
Claims (7)
1. a high strength, fast-response platinum resistance temperature sensor, it is characterized in that: temperature-sensing element is installed in the path section in the reducing temperature-sensing sleeve, the gap-fill of temperature-sensing element and temperature-sensing sleeve has insulating material, armouring signal cable lead-in wire is housed in the interior protection tube, armouring signal cable lead-in wire is connected with temperature-sensing element, temperature-sensing sleeve and the welding of interior protection tube form the thermometer core body, sealed tube and the welding of thermometer core body; The bottom of taper outside protective pipe miner diameter end is provided with bottom outlet, taper outside protective pipe path section is disposed radially three groups of pod apertures of dividing circumference equally, each group is distributed with several pod apertures vertically, and the rear end of outside protective pipe and medium fluid pipeline base thread are tightly connected; Interior protection tube and outside protective pipe inner chamber are fitted, and interior protection tube and outside protective pipe seal with the Swagelok clamping sleeve blow-out patch, clamping sleeve blow-out patch body and outside protective pipe welding.
2. high strength according to claim 1, fast-response platinum resistance temperature sensor is characterized in that: the pod apertures that described each group distributes vertically is 4, and its sectional area summation equates with the sectional area of bottom outlet.
3. high strength according to claim 1, fast-response platinum resistance temperature sensor, it is characterized in that: described temperature-sensing element is column ceramic platinum resistance element.
4. high strength according to claim 1, fast-response platinum resistance temperature sensor is characterized in that: described temperature-sensing sleeve adopts high-intensity stainless steel material to make.
5. high strength according to claim 1, fast-response platinum resistance temperature sensor, it is characterized in that: being filled with insulating material between temperature-sensing element and the temperature-sensing sleeve is MgO or Al
2O
3Or BeO.
6. high strength according to claim 1, fast-response platinum resistance temperature sensor is characterized in that: front card, the sealing of rear card two clips Swagelok clamping sleeve blow-out patch are adopted in described sealing.
7. high strength according to claim 1, fast-response platinum resistance temperature sensor, it is characterized in that: a described sealed tube part is positioned at outside protective pipe, and another part stretches out outside protective pipe.
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|---|---|---|---|
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| CN201210565294.3A CN103033281B (en) | 2012-12-24 | 2012-12-24 | Platinum resistance temperature sensor with high intensity and fast response |
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| CN103033281B CN103033281B (en) | 2015-01-21 |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103353195A (en) * | 2013-08-06 | 2013-10-16 | 合肥华凌股份有限公司 | Refrigeration equipment |
| CN103592048A (en) * | 2013-10-16 | 2014-02-19 | 安徽蓝德仪表有限公司 | Leading-in anti-explosion platinum thermistor for air compressor |
| CN103592049A (en) * | 2013-10-16 | 2014-02-19 | 安徽蓝德仪表有限公司 | Anti-explosion platinum thermistor for air compressor |
| CN103657503A (en) * | 2013-12-06 | 2014-03-26 | 柳州市豪杰特化工机械有限责任公司 | Stirring equipment temperature measurement structure |
| CN104748874A (en) * | 2015-04-15 | 2015-07-01 | 久茂自动化(大连)有限公司 | Marine engine temperature sensor |
| CN105784173A (en) * | 2016-03-08 | 2016-07-20 | 北京航天试验技术研究所 | Platinum resistance temperature sensor suitable for low-temperature high-pressure environment |
| CN107665743A (en) * | 2017-10-20 | 2018-02-06 | 中国核动力研究设计院 | Thermometer and its temperature measurement system for integral reactor temperature survey |
| CN108507703A (en) * | 2018-05-08 | 2018-09-07 | 上海岗崎控制仪表有限公司 | A kind of biomass cracking volume sensor |
| 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 |
| CN109855754A (en) * | 2017-11-30 | 2019-06-07 | 北京航天试验技术研究所 | A kind of temperature sensor |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103592048A (en) * | 2013-10-16 | 2014-02-19 | 安徽蓝德仪表有限公司 | Leading-in anti-explosion platinum thermistor for air compressor |
| CN103592049A (en) * | 2013-10-16 | 2014-02-19 | 安徽蓝德仪表有限公司 | Anti-explosion platinum thermistor for air compressor |
| CN103657503A (en) * | 2013-12-06 | 2014-03-26 | 柳州市豪杰特化工机械有限责任公司 | Stirring equipment temperature measurement structure |
| CN104748874A (en) * | 2015-04-15 | 2015-07-01 | 久茂自动化(大连)有限公司 | Marine engine temperature sensor |
| CN105784173A (en) * | 2016-03-08 | 2016-07-20 | 北京航天试验技术研究所 | Platinum resistance temperature sensor suitable for low-temperature high-pressure environment |
| CN107665743A (en) * | 2017-10-20 | 2018-02-06 | 中国核动力研究设计院 | Thermometer and its temperature measurement system for integral reactor temperature survey |
| CN107665743B (en) * | 2017-10-20 | 2023-11-24 | 中国核动力研究设计院 | Thermometer for measuring temperature of integrated reactor and temperature measuring system thereof |
| CN109855754A (en) * | 2017-11-30 | 2019-06-07 | 北京航天试验技术研究所 | A kind of temperature sensor |
| CN108507703A (en) * | 2018-05-08 | 2018-09-07 | 上海岗崎控制仪表有限公司 | A kind of biomass cracking volume sensor |
| 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 |
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Effective date of registration: 20191114 Address after: 411100 fire brigade office building, no.77-1, No.4, Jiefang North Road, Guangchang street, Yuhu District, Xiangtan City, Hunan Province Patentee after: Hunan Jianglu Instrument Co.,Ltd. Address before: No. 8 road 400707 Fang Zhen Caijiaying Chongqing city Beibei District Patentee before: CHONGQING MATERIALS RESEARCH INSTITUTE Co.,Ltd. Effective date of registration: 20191114 Address after: No. 8 road 400707 Fang Zhen Caijiaying Chongqing city Beibei District Patentee after: CHONGQING MATERIALS RESEARCH INSTITUTE Co.,Ltd. Address before: No. 8 road 400707 Fang Zhen Caijiaying Chongqing city Beibei District Patentee before: Chongqing Materials Research Institute |