CN103874251B - Flexible pipe safety-type bolt electric heater for repairing steam turbine - Google Patents
Flexible pipe safety-type bolt electric heater for repairing steam turbine Download PDFInfo
- Publication number
- CN103874251B CN103874251B CN201410130661.6A CN201410130661A CN103874251B CN 103874251 B CN103874251 B CN 103874251B CN 201410130661 A CN201410130661 A CN 201410130661A CN 103874251 B CN103874251 B CN 103874251B
- Authority
- CN
- China
- Prior art keywords
- stainless steel
- flexible hose
- bolt
- steam turbine
- steel flexible
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Resistance Heating (AREA)
Abstract
The present invention is a kind of flexible pipe safety-type bolt electric heater for repairing steam turbine, stainless steel flexible hose is as metallic sheath, in-built resistance wire, thermal conductivity and the good magnesia powder of insulating properties is filled up in space, stainless steel flexible hose front-end end enclosure Stainless Steel Tubular Plates is welded, stainless steel flexible hose rear end cylindrical welds the circular upper part and square lower part flange of 3 millimeters thick, fix with four hold-down screws and insulation operating grip.In the bottom of circular upper part and square lower part flange, weld a M8 earthing screw.When steam turbine cylinder threaded bolt upper space is less, stainless steel flexible hose can bend and inject in bolt-center hole, heats bolt; After heating terminates, can conveniently extract bolt-center hole.Before using, a ground wire is connected on earthing screw, improves security performance, prevent electric shock accidents.
Description
Technical field
The present invention is a kind of electric bolt heater, is specifically related to a kind of flexible pipe safety-type bolt electric heater for repairing steam turbine.
Background technology
Turbine Steam in-cylinder pressure is high, and when tightening or dismantle turbine bolt, moment is large, and labour intensity is large.Utilize principle of expanding with heat and contracting with cold, bolt is heated, can tighten easily, quickly and easily or demounting bolt.The brief principle structure of bolt electric heater for repairing steam turbine is: metallic sheath, built with resistance wire, fills up thermal conductivity and the good magnesia powder of insulating properties in space.Wire in insulation operating grip is connected with resistance wire, and electric current arrives resistance wire through wire, and electric energy converts heat energy to, the thermal energy transfer oxidizing magnesium powder of resistance wire, then passes to metallic sheath.Metallic sheath injects in bolt-center hole, and the thermal energy transfer of metallic sheath is to bolt.Original technical scheme is: metallic sheath is stainless steel hard tube, no ground screw on the flange that stainless steel hard tube is connected with insulation operating grip, there is following gap: bolt electric heater for repairing steam turbine injects bolt-center hole and heats, when turbine bolt upper space is less, the metallic sheath that stainless steel hard tube does can not vertically inject or extract in bolt-center hole; When the insulating properties of operating grip slightly declines, easily there is electric shock accidents.
Summary of the invention
Technical problem to be solved by this invention is: provide a kind of flexible pipe safety-type bolt electric heater for repairing steam turbine, metallic sheath is stainless steel flexible hose, metallic sheath is connected with insulation operating grip round flange on below, round flange lower weld earthing screw on below.
Adopt above technical scheme, its effect is apparent:
1, stainless steel flexible hose can bend, and when steam turbine cylinder threaded bolt upper space is less, stainless steel flexible hose can conveniently inject in bolt-center hole, heats bolt; After heating terminates, can conveniently extract bolt-center hole.
2, before using, a wire is connected on earthing screw, improves security performance, prevent electric shock accidents.
Accompanying drawing explanation
Fig. 1 is the bolt electric heater for repairing steam turbine structure diagram of original technical scheme.
Fig. 2 is inventive hose safety-type bolt electric heater for repairing steam turbine structure diagram.
In figure: 1, Stainless Steel Tubular Plates 2, resistance wire 3, magnesia powder 4, stainless steel hard tube 5, flange 6, insulation operating grip 7, hold-down screw 8, stainless steel flexible hose 9, circular upper part and square lower part flange 10, earthing screw
Embodiment
With reference to Fig. 1, Fig. 2, the present invention is a kind of flexible pipe safety-type bolt electric heater for repairing steam turbine, stainless steel flexible hose 8 is as metallic sheath, in-built resistance wire 2, fill up thermal conductivity and the good magnesia powder 3 of insulating properties in space, stainless steel flexible hose 8 front-end end enclosure Stainless Steel Tubular Plates 1 is welded, stainless steel flexible hose 8 rear end cylindrical welds the circular upper part and square lower part flange 9 of 3 millimeters thick, fix with four M5 hold-down screws 7 and insulation operating grip, in the bottom of circular upper part and square lower part flange 9, weld a M8 earthing screw 10.
Claims (1)
1. a flexible pipe safety-type bolt electric heater for repairing steam turbine, it comprises Stainless Steel Tubular Plates (1), resistance wire (2), magnesia powder (3), stainless steel flexible hose (8), circular upper part and square lower part flange (9), insulation operating grip (6), hold-down screw (7), earthing screw (10), it is characterized in that: stainless steel flexible hose (8) is as metallic sheath, in-built resistance wire (2), thermal conductivity and the good magnesia powder (3) of insulating properties is filled up in space, stainless steel flexible hose (8) front-end end enclosure Stainless Steel Tubular Plates (1) is welded, stainless steel flexible hose (8) rear end cylindrical welds the circular upper part and square lower part flange (9) of 3 millimeters thick, fix with four M5 hold-down screws (7) and insulation operating grip (6), in the bottom of circular upper part and square lower part flange (9), weld a M8 earthing screw (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410130661.6A CN103874251B (en) | 2014-04-03 | 2014-04-03 | Flexible pipe safety-type bolt electric heater for repairing steam turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410130661.6A CN103874251B (en) | 2014-04-03 | 2014-04-03 | Flexible pipe safety-type bolt electric heater for repairing steam turbine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103874251A CN103874251A (en) | 2014-06-18 |
| CN103874251B true CN103874251B (en) | 2015-11-25 |
Family
ID=50912284
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410130661.6A Active CN103874251B (en) | 2014-04-03 | 2014-04-03 | Flexible pipe safety-type bolt electric heater for repairing steam turbine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103874251B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104202855A (en) * | 2014-08-13 | 2014-12-10 | 黑龙江瀚锋电热机电设备制造有限公司 | High power bolt heating system and heating method |
| CN105592583B (en) * | 2015-11-16 | 2018-12-11 | 国电浙江北仑第三发电有限公司 | Bolt electrically heated rod |
| CN114102116B (en) * | 2021-12-07 | 2024-05-10 | 陕西渭河煤化工集团有限责任公司 | Device for disassembling nut by heating hollow stud through flame in narrow space |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2158448Y (en) * | 1993-05-20 | 1994-03-09 | 上海康亚科技实业公司 | Heat-pipe electric heater for steam turbine |
| CN2187227Y (en) * | 1993-12-23 | 1995-01-11 | 镇江南方电焊设备厂 | Electric heater for steam turbine bolt |
| US6147331A (en) * | 1999-07-29 | 2000-11-14 | Heatron, Inc. | Band heater |
| CN201159461Y (en) * | 2007-12-14 | 2008-12-03 | 上海电气电站设备有限公司 | Flame heater for cylinder coupling bolt of turbine |
| CN201426191Y (en) * | 2009-05-19 | 2010-03-17 | 济南德中电力技术有限公司 | Electric induction heater for turbine bolts |
-
2014
- 2014-04-03 CN CN201410130661.6A patent/CN103874251B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2158448Y (en) * | 1993-05-20 | 1994-03-09 | 上海康亚科技实业公司 | Heat-pipe electric heater for steam turbine |
| CN2187227Y (en) * | 1993-12-23 | 1995-01-11 | 镇江南方电焊设备厂 | Electric heater for steam turbine bolt |
| US6147331A (en) * | 1999-07-29 | 2000-11-14 | Heatron, Inc. | Band heater |
| CN201159461Y (en) * | 2007-12-14 | 2008-12-03 | 上海电气电站设备有限公司 | Flame heater for cylinder coupling bolt of turbine |
| CN201426191Y (en) * | 2009-05-19 | 2010-03-17 | 济南德中电力技术有限公司 | Electric induction heater for turbine bolts |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103874251A (en) | 2014-06-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103874251B (en) | Flexible pipe safety-type bolt electric heater for repairing steam turbine | |
| CN204104157U (en) | Flexible pipe safety-type bolt electric heater for repairing steam turbine | |
| CN104202856A (en) | U-shaped electric heating tube | |
| CN203504779U (en) | Electrothermal tube device | |
| CN205160813U (en) | Electric heating device for pipe | |
| CN205747463U (en) | A kind of solar electric water heater | |
| CN204839897U (en) | Water and electricity separation hot -water bottle | |
| CN206504313U (en) | A kind of heater | |
| CN105673982A (en) | Internal heating type heating device | |
| CN201062880Y (en) | Tungsten filament vacuum rapid electric heating tube of electric water heater | |
| CN103813538A (en) | Pressure hydrogen, neon and xenon electric heating device | |
| CN201014764Y (en) | Nano swelling halogen electric heating tube of electric water heater | |
| CN203279228U (en) | Spiral rapid heating pipe for water | |
| CN103239130A (en) | Egg boiler | |
| CN103179705A (en) | Device for electrically heating hydrogen, neon and argon under pressure | |
| CN106813410A (en) | A kind of vacuum tube solar heating element water tank stand apparatus | |
| CN103179707A (en) | Device for electrically heating hydrogen, xenon and radon gas under pressure | |
| CN103179709A (en) | Device and method for electrically heating argon under pressure | |
| CN105682264A (en) | Heating apparatus | |
| CN103796363A (en) | Under-pressure neon-xenon electric-heating device | |
| CN103179710A (en) | Device for electrically heating argon under pressure | |
| CN106871425A (en) | Simple intelligent quick heater | |
| CN103179706A (en) | Device for electrically heating hydrogen, xenon and carbon dioxide under pressure | |
| CN103813535A (en) | Pressurizing electric heating device adopting hydrogen, helium, neon, argon, krypton, xenon and radon | |
| CN103813553A (en) | Pressure argon and radon gas electric heating device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP02 | Change in the address of a patent holder |
Address after: 212200, heroes industrial concentrated area, three Mao street, Yangzhong, Jiangsu Patentee after: Zhenjiang Lifan Explosion-Proof Explosion-Proof Electrical Appliance Co., Ltd. Address before: Yangzhong City, Jiangsu province 212200 Yihe road Zhenjiang City, No. 8 Patentee before: Zhenjiang Lifan Explosion-Proof Explosion-Proof Electrical Appliance Co., Ltd. |