CN204350336U - For the sheathed heater of high-temperature molten salt with thermal conductance type liquid level transducer - Google Patents
For the sheathed heater of high-temperature molten salt with thermal conductance type liquid level transducer Download PDFInfo
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- CN204350336U CN204350336U CN201420798031.1U CN201420798031U CN204350336U CN 204350336 U CN204350336 U CN 204350336U CN 201420798031 U CN201420798031 U CN 201420798031U CN 204350336 U CN204350336 U CN 204350336U
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Abstract
The utility model relates to a kind of sheathed heater for high-temperature molten salt thermal conductance type liquid level transducer; comprise protection metal pipe, heater strip; insulating material is filled with between protection metal pipe and heater strip; in the upper end of protection metal pipe, power supply lead wire is set; described protection metal pipe comprises enlarged diameter section, reduced diameter section and circular cone variable cross-section section between the two; the enlarged diameter section of described protection metal pipe, the external diameter ratio of reduced diameter section are 1.5 ~ 4; the reduced diameter section of described protection metal pipe turns to helical form, forms helical form heater.This sheathed heater reliability is high, long service life, and manufacture craft is simple, and can meet reliability and the certainty of measurement of hot environment use.
Description
Technical field
The utility model relates to a kind of sheathed heater, particularly a kind of sheathed heater for high-temperature molten salt thermal conductance type liquid level transducer.
Background technology
MSR is a kind of fission-type reactor, with the salt-mixture of molten state for Main Coolant, at high temperature work (the higher heat efficiency can be obtained) time keep low-steam pressure, thus reduce mechanical stress, improve fail safe, and lower than molten sodium cooling agent activity.
Recently, fused salt is utilized to accelerate once again as the research of the reactor aspect of cooling agent.
Tradition MSR and superhigh temperature reactor are all considered possible design and under bringing Generation IV Primary Study framework into.Current is being just liquid salt superhigh temperature reactor at one of studied superhigh temperature reactor version, is generally also referred to as advanced high temperature nuclear reactor.In essence, it adopts liquid salt as the standard VHTR design of primary Ioops cooling agent, instead of adopt single helium loop.
Molten salt react ion shut-down system, has the cost advantage of safety and low-voltage high-temperature cooling agent, also can share liquid-metal cooled reactor.Obviously, molten-salt reactor (MSR) reactor core does not have the steam that can cause exploding, and does not have the GB150-1998 of huge costliness yet.Because it can at high temperature run, can high by service efficiency, lightweight brayton cycle steam turbine be just electric energy by thermal power transfer.Fused salt, as FLiBe etc., is high corrosiveness, along with temperature rising corrosivity is stronger.For the main cooling circuit of MSR, need a kind of liquid level sensor that can bear high temperature corrosion and strong irradiation, normally work for fixed point monitoring and accident, the liquid level of fused salt after accident.But the principle of level gauging and technology are very many, but because needs long-term work is under perishable, high temperature, high radiation environment condition, the actual technology that can select is very limited, require that sensor accuracy class is high, the response time soon, judgement is accurately and timely made to loss-of-coolant accident.
Applicant proposed a kind of high-temperature molten salt liquid level sensor based on heat-conducted principle, the change of monitoring fused salt liquid level, therefore, needs to design a kind of sheathed heater, can meet reliability and the certainty of measurement of hot environment use, and extend useful life.
Summary of the invention
The purpose of this utility model is for the deficiencies in the prior art, there is provided a kind of sheathed heater for high-temperature molten salt thermal conductance type liquid level transducer, this sheathed heater reliability is high, long service life, manufacture craft is simple, and can meet reliability and the certainty of measurement of hot environment use.
The technical solution of the utility model is: a kind of sheathed heater for high-temperature molten salt thermal conductance type liquid level transducer; comprise protection metal pipe, heater strip; insulating material is filled with between protection metal pipe and heater strip; in the upper end of protection metal pipe, power supply lead wire is set; described protection metal pipe comprises enlarged diameter section, reduced diameter section and circular cone variable cross-section section between the two; the enlarged diameter section of described protection metal pipe, the external diameter ratio of reduced diameter section are 1.5 ~ 4; the reduced diameter section of described protection metal pipe turns to helical form, forms helical form heater.
The diameter of the enlarged diameter section of described protection metal pipe is 6mm, and the diameter of reduced diameter section is 3mm.
Described heater strip is two, and two heater strips stretch in protection metal pipe, and two heater strip lower end welding, upper end is drawn.
Described insulating material adopts insulating oxide magnesium powder porcelain knob.
The beneficial effects of the utility model are: because the sheathed heater for high-temperature molten salt thermal conductance type liquid level transducer of the present utility model comprises protection metal pipe, heater strip; insulating material is filled with between protection metal pipe and heater strip; in the upper end of protection metal pipe, power supply lead wire is set; described protection metal pipe comprises enlarged diameter section, reduced diameter section and circular cone variable cross-section section between the two; the enlarged diameter section of described protection metal pipe, the external diameter ratio of reduced diameter section are 1.5 ~ 4; the reduced diameter section of described protection metal pipe turns to helical form, forms helical form heater.Reduced diameter section is that heating section is longer, enlarged diameter section prevents heater caloric value excessive, scaling loss fluid sealant, for reducing heater caloric value, sheathed heater arranges the termination of enlarged diameter section, the heat that termination is assembled is little as far as possible, reach the athermic effect in termination, termination manufacture craft can not only be simplified, more can ensure the overall performance particularly reliability heating components and parts, extend useful life of the present utility model.And the reduced diameter section of sheathed heater is turned to helical form or spring-like can lengthen built-in heater strip length, under identical power conditions, obtain less surface loading, improve the useful life of heater, and reliability, the high accuracy under hot environment.Under the utility model can be used for different temperatures fused salt environmental condition, the longitudinal height and position monitoring of fused salt liquid level, solves level monitoring problem under high temperature, corrosion working conditions.
Be further described below in conjunction with the drawings and specific embodiments.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the P portion enlarged drawing of Fig. 1;
Fig. 3 is that the A-A of Fig. 1 is to cutaway view.
In accompanying drawing, 1 is power supply lead wire, and 2 is heater strip, and 3 is insulating material, and 4 is protection metal pipe, and 5 is the not section of heating, and 6 is heating section, and 7 is variable cross-section section.
Embodiment
See Fig. 1 to Fig. 3, a kind of sheathed heater for high-temperature molten salt thermal conductance type liquid level transducer, comprises protection metal pipe 4, heater strip 2.Described heater strip is two, and two heater strips stretch in protection metal pipe, and two heater strip lower end welding, upper end is drawn.Described heater strip can adopt φ 1.3mmNi80Cr20 heater strip to make, and heater strip diameter and the trade mark also can be changed according to engineer applied condition.Insulating material 3 is filled with between protection metal pipe and heater strip.Described insulating material 3 adopts insulating oxide magnesium powder porcelain knob.Arrange power supply lead wire 1 in the upper end of protection metal pipe 4, described protection metal pipe comprises enlarged diameter section, reduced diameter section and circular cone variable cross-section section 7 between the two.The enlarged diameter section of sheathed heater is the heating section 6 of heater.The reduced diameter section of sheathed heater is the not hot arc 5 of heater.The enlarged diameter section of described protection metal pipe, the external diameter ratio of reduced diameter section are 1.5 ~ 4.The diameter of the enlarged diameter section of the described protection metal pipe of the present embodiment is 6mm, and the diameter of reduced diameter section is 3mm.The reduced diameter section of described protection metal pipe turns to helical form, forms helical form heater.
When making sheathed heater; by heater strip, protection metal pipe 316L, insulating oxide magnesium powder three assembling after through drawing repeatedly, be heat-treated to and make heating cable; and adopt technique of swaging that heating cable is made single-ended variable section structure; two sections of proportion 1.5:1 ~ 4:1; then reduced diameter section is turned to helical form, make helical form heater.
Embodiment one
After 316L protection metal pipe, insulating oxide magnesium powder porcelain knob φ 7.6 × 1.8, φ 1.3mmNi80Cr20 heater strip, three being assembled after drawing repeatedly, being heat-treated to φ 4.6, make heating cable.Heating cable is made single-ended variable section structure φ 4.6 → φ 2mm by technique of employing being swaged, then by φ 2mm section wound into spring dress heater.
Overload test:
Increase heater voltage, when making the reference thermocouple displays temperature of high-temperature molten salt thermal conductance type liquid level transducer be 1000 DEG C, after work 4h, heating element without open circuit, without damaging phenomenon.
Claims (4)
1. one kind for the sheathed heater of high-temperature molten salt with thermal conductance type liquid level transducer; comprise protection metal pipe, heater strip; insulating material is filled with between protection metal pipe and heater strip; in the upper end of protection metal pipe, power supply lead wire is set; it is characterized in that: described protection metal pipe comprises enlarged diameter section, reduced diameter section and circular cone variable cross-section section between the two; the enlarged diameter section of described protection metal pipe, the external diameter ratio of reduced diameter section are 1.5 ~ 4; the reduced diameter section of described protection metal pipe turns to helical form, forms helical form heater.
2. the sheathed heater for high-temperature molten salt thermal conductance type liquid level transducer according to claim 1, is characterized in that: the diameter of the enlarged diameter section of described protection metal pipe is 6mm, and the diameter of reduced diameter section is 3mm.
3. the sheathed heater for high-temperature molten salt thermal conductance type liquid level transducer according to claim 1, is characterized in that: described heater strip is two, and two heater strips stretch in protection metal pipe, and two heater strip lower end welding, upper end is drawn.
4. the sheathed heater for high-temperature molten salt thermal conductance type liquid level transducer according to claim 1, is characterized in that: described insulating material adopts insulating oxide magnesium powder porcelain knob.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420798031.1U CN204350336U (en) | 2014-12-17 | 2014-12-17 | For the sheathed heater of high-temperature molten salt with thermal conductance type liquid level transducer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420798031.1U CN204350336U (en) | 2014-12-17 | 2014-12-17 | For the sheathed heater of high-temperature molten salt with thermal conductance type liquid level transducer |
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| CN204350336U true CN204350336U (en) | 2015-05-20 |
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| CN201420798031.1U Active CN204350336U (en) | 2014-12-17 | 2014-12-17 | For the sheathed heater of high-temperature molten salt with thermal conductance type liquid level transducer |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106617313A (en) * | 2015-07-15 | 2017-05-10 | 深圳市新宜康科技有限公司 | Atomization heating wire of electronic cigarette |
| CN107809810A (en) * | 2017-10-31 | 2018-03-16 | 山东华宁电伴热科技有限公司 | A kind of spring heater |
| CN108235472A (en) * | 2018-02-10 | 2018-06-29 | 上海欧展电器有限公司 | A kind of armouring heating tube and its manufacture craft |
| CN109737602A (en) * | 2018-12-13 | 2019-05-10 | 华能无锡电热器材有限公司 | A kind of high pressure high density fused salt electric heater |
-
2014
- 2014-12-17 CN CN201420798031.1U patent/CN204350336U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106617313A (en) * | 2015-07-15 | 2017-05-10 | 深圳市新宜康科技有限公司 | Atomization heating wire of electronic cigarette |
| CN107809810A (en) * | 2017-10-31 | 2018-03-16 | 山东华宁电伴热科技有限公司 | A kind of spring heater |
| CN108235472A (en) * | 2018-02-10 | 2018-06-29 | 上海欧展电器有限公司 | A kind of armouring heating tube and its manufacture craft |
| CN109737602A (en) * | 2018-12-13 | 2019-05-10 | 华能无锡电热器材有限公司 | A kind of high pressure high density fused salt electric heater |
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