CN104111124A - Anti-corrosion device of temperature element of high-pressure cylinder of steam turbine - Google Patents
Anti-corrosion device of temperature element of high-pressure cylinder of steam turbine Download PDFInfo
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- CN104111124A CN104111124A CN201410382473.2A CN201410382473A CN104111124A CN 104111124 A CN104111124 A CN 104111124A CN 201410382473 A CN201410382473 A CN 201410382473A CN 104111124 A CN104111124 A CN 104111124A
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- heat
- shrinkable tube
- heat shrinkable
- shrink tube
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Abstract
An anti-corrosion device of a temperature element of a high-pressure cylinder of a steam turbine comprises a heat shrinkable tube; the heat shrinkable tube and the external of an armored thermocouple which is arranged on the high-pressure cylinder are glued together; the heat shrinkable tube comprises a tube body and a fixing strip; the heat shrinkable tube is usually formed by polymer materials through the radiation crosslinking treatment and expansion process; a long through opening is axially formed in the heat shrinkable tube; the inner wall of the heat shrinkable tube is matched with the outer diameter of the armored thermocouple; the heat shrinkable tube is shrunken and bundled on armored thermocouple through heating; the fixing strip and an open hot melt adhesive are glued on the external of the opening of the heat shrinkable tube; a plurality of projections are uniformly distributed on the outer wall of the heat shrinkable tube. According to the anti-corrosion device of the temperature element of the high-pressure cylinder of the steam turbine, the heat shrinkable tube sleeves the armored thermocouple to enable the heat shrinkable tube steel to be arranged at the steel armor position of the armored thermocouple to be sealed and accordingly the steel armor position of the armored thermocouple can be isolated from the corrosive gas emitted from heat insulating materials, the corrosion of the corrosive gas volatilized from the heat insulating materials on the armor position of the armored thermocouple is eliminated, and the service life of the armored thermocouple is extended, the measurement accuracy is not affected, the cost is low, and the installation, the maintenance and the replacement are easy.
Description
Technical field
The invention belongs to electric power factory equipment applied technical field, especially relate to a kind of steam turbine high-pressure cylinder temperature element (TE) erosion protection system.
Background technology
In steam turbine high-pressure cylinder, because vapour density is large, water droplet is little, easily acceleration, effect of impact is very little, therefore there will not be the erosion problem of moving vane, but can cause the erosion of a series of stationary components.Erosion-corrosion mainly occurs in cylinder, holds on the motionless parts such as ring, packing.The erosion-corrosion of stationary components is one of nuclear power saturated vapor turbine subject matter, causes the obvious decline of unit reliability and economy.
" analysis of the erosion-corrosion of Qinshan nuclear power plant 300MW steam turbine " analyzed with regard to the steam turbine erosion found in conventional island service work and the erosion phenomenon of jet chimney, erosion-corrosion phenomenon to high pressure cylinder is analyzed, and has proposed the measure of dealing with problems.As eliminate ponding may, at cylinder, hold the lower curtates such as ring and have suitable weep hole, be used for draining moisture, eliminate the direct erosion that ponding is avoided water droplet; At steam flow passage places such as cylinder, pipelines, there is the good aerodynamic shape of design and in a series of situations, reduce as much as possible flow velocity, as the high-pressure exhaust pipe at this unit, MSR is stainless guide vane etc. to being equipped with material in the pipeline of low pressure (LP) cylinder and threeway.
" 350MW unit high pressure cylinder analysis of Corrosion Reason " is according to the analysis to high pressure cylinder corrosion characteristics and salt crust during overhaul, illustrated that corrosion occurs in high pressure cylinder rather than low pressure (LP) cylinder, and there is different shapes, relevant with operating condition, water quality and the high pressure cylinder material of unit.Proposed to avoid the concrete measure of Subcritical Units high pressure cylinder pitting.As Subcritical Units, should avoid as much as possible underrun, prevent condenser leakage.The unit of primary starting is blowpipe thoroughly, with the mechanical impurity in minimizing system, also can guide particle into bypass.Meanwhile, test run phase length, the low feature of loading that in order to adapt to large capacity unit, may occur, the problem that prevents sour corrosion that manufacturing firm should consider high pressure cylinder, installs anticorrosive coat additional at steam turbine sensitive part, as plasma jet coating.
In sum, the measurement parameter that belongs to weight in existing generating plant steam turbine high-pressure cylinder temperature survey, the armoured thermocouples of drawing money on credit that adopt are measured more at present, the how good gas attack that all easily insulation clay volatilizees that steel armour part quality is done, cause steel armour partial corrosion serious, cause steam turbine high-pressure cylinder temperature element (TE) to be corroded, reduce element serviceable life, element is measured malfunctioning, thereby affect stable operation of unit, and steam turbine cannot be changed to steam turbine high-pressure cylinder temperature element (TE) while not taking off cylinder.
Summary of the invention
For solving the problems of the technologies described above, the invention provides a kind of steam turbine high-pressure cylinder temperature element (TE) erosion protection system, the heat-shrink tube using conventionally by macromolecular material, through radiation crosslinking, is processed and expansion technique is made, there is shape memory function, the feature of long service life, temperature element (TE) is wrapped up in heating, can reach the object that steam turbine high-pressure cylinder temperature element (TE) is not corroded, and simple in structure, be suitable for, be easy to realize.
The present invention solves the technical scheme that its technical matters takes, comprise heat-shrink tube, fixed strip, wherein, described heat-shrink tube axially have an elongated opening, described heat-shrink tube internal diameter coordinates with the armoured thermocouple external diameter on high pressure cylinder, and heat-shrink tube shrinks and restraints and is rolled on armoured thermocouple external diameter, described fixed strip coordinates with the elongated opening of heat-shrink tube, on described fixed strip, there is hot melt adhesive, the inwall of described heat-shrink tube is incomplete tooth-shape structure, also can be tooth-shape structure completely, also can be arbitrary geometric configuration, in the inner diameter wall of described heat-shrink tube, be coated with hot melt adhesive layer, in the outside diameter wall of described heat-shrink tube, be evenly equipped with some projections.
The invention has the beneficial effects as follows, heat-shrink tube is enclosed within on armoured thermocouple, the steel armour position sealing that makes it be placed in armoured thermocouple, realize the steel armour position of armoured thermocouple and corrosive gas that insulation material volatilizes isolated, stop the corrosion to the steel armour position of armoured thermocouple of corrosive gas that insulation material volatilizes, extend the serviceable life of armoured thermocouple.And do not affect measurement accuracy, cost is low, is easy to installation and maintenance and changes.
Accompanying drawing explanation:
Below in conjunction with drawings and Examples, the present invention is further described.
Fig. 1 is structural representation of the present invention;
Fig. 2 is the transverse sectional view of heat-shrink tube of the present invention;
Fig. 3 is heat-shrink tube inwall schematic diagram of the present invention;
Fig. 4 is heat-shrink tube outer wall construction figure of the present invention.
Specific embodiment:
The specific embodiment of the invention is: referring to Fig. 1 and Fig. 2, comprise heat-shrink tube, fixed strip, described heat-shrink tube 3 axially have an elongated opening 5, described heat-shrink tube 3 conventionally by macromolecular material, through radiation crosslinking, is processed and expansion technique is made, there is shape memory, life-span length and insulation, antisepsis, heat-shrink tube 3 is broken into two with one's hands along elongated opening 5 places, be enclosed within on the armoured thermocouple 2 on high pressure cylinder 1 and adjust its position, heat-shrink tube 3 may also may leave a seam in overlap joint state at opening 5 places, on described fixed strip 4, there is hot melt adhesive, fixed strip 4 coordinates with the elongated opening 5 of heat-shrink tube 3, make heat-shrink tube 3 become the integral body of a sealing, with reference to Fig. 2, Fig. 4, described heat-shrink tube 3 inwall side faces are coated with hot melt adhesive layer 6, hot-melt is put on the inwall of heat-shrink tube 3, makes heat-shrink tube 3 bodys shrink through heating, and cooling rear heat-shrink tube 3 is securely fixed on the steel armour position of armoured thermocouple 2 by hot melt adhesive, with reference to Fig. 4, the inner diameter wall of described heat-shrink tube is incomplete tooth-shape structure 7, also can be tooth-shape structure completely, its profile of tooth can be arbitrary geometric configuration, by the inwall at heat-shrink tube 3, the surface area that tooth-shape structure 7 increases heat-shrink tube 3 inwalls is set, improve the adhesion between the steel armour position of itself and armoured thermocouple 2, with reference to Fig. 3, on the outer wall 8 of described heat-shrink tube, be evenly equipped with some projections, outer wall 8 at heat-shrink tube 3 arranges some protruding 9, make its outer wall 8 produce rough shape, because outer wall 8 produces uneven shape, therefore reduced the smooth finish of heat-shrink tube 3 outside surfaces, improved the friction force after controlling, effectively reduced the possibility of slippage, the present invention is applicable to all electrical equipment heat-shrink tube protection that are easily corroded.
Claims (3)
1. a steam turbine high-pressure cylinder temperature element (TE) erosion protection system, it is characterized in that, comprise heat-shrink tube, fixed strip, described heat-shrink tube axially have an elongated opening, described heat-shrink tube internal diameter coordinates with the armoured thermocouple external diameter on high pressure cylinder, and heat-shrink tube shrinks and restraints and is rolled on armoured thermocouple external diameter, on described fixed strip, has hot melt adhesive, and fixed strip coordinates with the elongated opening of heat-shrink tube.
2. a kind of steam turbine high-pressure cylinder temperature element (TE) erosion protection system according to claim 1, it is characterized in that, heat-shrink tube inwall is incomplete tooth-shape structure, can be also tooth-shape structure completely, also can be different geometric configuratioies, in the inner diameter wall of heat-shrink tube, be coated with hot melt adhesive layer.
3. a kind of steam turbine high-pressure cylinder temperature element (TE) erosion protection system according to claim 1, is characterized in that, is evenly equipped with some projections in the outside diameter wall of heat-shrink tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410382473.2A CN104111124A (en) | 2014-08-06 | 2014-08-06 | Anti-corrosion device of temperature element of high-pressure cylinder of steam turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410382473.2A CN104111124A (en) | 2014-08-06 | 2014-08-06 | Anti-corrosion device of temperature element of high-pressure cylinder of steam turbine |
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| CN104111124A true CN104111124A (en) | 2014-10-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410382473.2A Pending CN104111124A (en) | 2014-08-06 | 2014-08-06 | Anti-corrosion device of temperature element of high-pressure cylinder of steam turbine |
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| CN (1) | CN104111124A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105240638A (en) * | 2015-11-09 | 2016-01-13 | 成都长江热缩材料有限公司 | Dropping-preventing type pipe sleeve for heat-shrinkable casing pipe with limiting teeth |
| CN107942440A (en) * | 2018-01-02 | 2018-04-20 | 任丘市志强塑料制品有限公司 | A kind of mini optical fibre heat-shrink tube and its production technology |
| CN109459153A (en) * | 2018-11-02 | 2019-03-12 | 吴方立 | Cracking furnace COT thermocouple and its protection sleeve pipe |
| CN113997577A (en) * | 2021-10-26 | 2022-02-01 | 上海海骄机电工程有限公司 | Electric fusion welding machine and use method thereof |
| CN114112090A (en) * | 2022-01-28 | 2022-03-01 | 华能平凉发电有限责任公司 | Novel temperature thermocouple for steam turbine set |
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| US4976142A (en) * | 1989-10-17 | 1990-12-11 | Baroid Technology, Inc. | Borehole pressure and temperature measurement system |
| CN2861994Y (en) * | 2005-12-12 | 2007-01-24 | 大庆石油管理局 | Temperature element protecting device |
| CN203116873U (en) * | 2013-01-10 | 2013-08-07 | 中国大唐集团环境技术有限公司 | Anti-corrosion temperature measurement device for turbine high pressure cylinder |
| CN203116874U (en) * | 2013-01-10 | 2013-08-07 | 中国大唐集团环境技术有限公司 | Corrosion resisting armored thermocouple |
| CN204241114U (en) * | 2014-08-06 | 2015-04-01 | 大唐双鸭山热电有限公司 | Steam turbine high-pressure cylinder temperature element (TE) erosion protection system |
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2014
- 2014-08-06 CN CN201410382473.2A patent/CN104111124A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4976142A (en) * | 1989-10-17 | 1990-12-11 | Baroid Technology, Inc. | Borehole pressure and temperature measurement system |
| CN2861994Y (en) * | 2005-12-12 | 2007-01-24 | 大庆石油管理局 | Temperature element protecting device |
| CN203116873U (en) * | 2013-01-10 | 2013-08-07 | 中国大唐集团环境技术有限公司 | Anti-corrosion temperature measurement device for turbine high pressure cylinder |
| CN203116874U (en) * | 2013-01-10 | 2013-08-07 | 中国大唐集团环境技术有限公司 | Corrosion resisting armored thermocouple |
| CN204241114U (en) * | 2014-08-06 | 2015-04-01 | 大唐双鸭山热电有限公司 | Steam turbine high-pressure cylinder temperature element (TE) erosion protection system |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105240638A (en) * | 2015-11-09 | 2016-01-13 | 成都长江热缩材料有限公司 | Dropping-preventing type pipe sleeve for heat-shrinkable casing pipe with limiting teeth |
| CN107942440A (en) * | 2018-01-02 | 2018-04-20 | 任丘市志强塑料制品有限公司 | A kind of mini optical fibre heat-shrink tube and its production technology |
| CN107942440B (en) * | 2018-01-02 | 2024-01-30 | 任丘市志强塑料制品有限公司 | Miniature optical fiber heat shrinkage tube and production process thereof |
| CN109459153A (en) * | 2018-11-02 | 2019-03-12 | 吴方立 | Cracking furnace COT thermocouple and its protection sleeve pipe |
| CN113997577A (en) * | 2021-10-26 | 2022-02-01 | 上海海骄机电工程有限公司 | Electric fusion welding machine and use method thereof |
| CN113997577B (en) * | 2021-10-26 | 2023-09-26 | 上海海骄机电工程有限公司 | Electric fusion welding machine and use method thereof |
| CN114112090A (en) * | 2022-01-28 | 2022-03-01 | 华能平凉发电有限责任公司 | Novel temperature thermocouple for steam turbine set |
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Application publication date: 20141022 |
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