CN206717635U - Steam turbine valve milling tool - Google Patents
Steam turbine valve milling tool Download PDFInfo
- Publication number
- CN206717635U CN206717635U CN201720615486.9U CN201720615486U CN206717635U CN 206717635 U CN206717635 U CN 206717635U CN 201720615486 U CN201720615486 U CN 201720615486U CN 206717635 U CN206717635 U CN 206717635U
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- China
- Prior art keywords
- bar
- steam turbine
- abrasive disk
- milling
- locating cover
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Abstract
The utility model discloses a kind of steam turbine valve milling tool, including abrasive disk, extension bar, milling bar, locating cover, copper sheathing, hex nut, adjustable support and grinding block, abrasive disk is conical disc, conical surface surrounding has been provided with multiple grinding blocks, screwed hole is provided among abrasive disk, screwed hole threaded connection among the lower end of extension bar and abrasive disk, the upper end of extension bar is threadedly coupled with the lower end of milling bar, and the upper end of milling bar with low speed electric drill through being connected after the copper sheathing of locating cover center；Four bar holes are evenly arranged with locating cover, correspondence position is respectively arranged with four adjustable supports, four adjustable support one end are extend into four bar holes after passing through locating cover edge, it is fixed on by hex nut on locating cover, the other end of four adjustable supports is extend into the groove corresponding to steam turbine valve.The utility model is mainly used in the grinding of steam turbine valve sealing surface of seat, simple in construction, and easy to use, versatility is stronger.
Description
Technical field：
A kind of milling tool is the utility model is related to, more particularly to a kind of steam turbine large size valve milling tool, is belonged to
Steam turbine valve service technique field.
Background technology：
Power plant steam turbine is the power core part of whole power plant, and large-size steam turbine valve is the control section of steam turbine,
It includes high pressure main stop valve, high voltage adjusting steam valve and reheat stop valve, and steam turbine valve easily occurs after operation a period of time
Valves leakage phenomenon, what interior leakage threatened maximum to steam turbine is to cause hypervelocity or even cause the serious accidents such as rotor failure, is being stopped
When machine carries out valve maintenance, the valve seat and seal spool position that often find steam turbine valve find there is the defects of pockmark, cut.
Traditional treatment method is ground using abrasive pastes, and in the power plant that construction period is strict, traditional treatment method has become system
The about stumbling-block of duration, therefore a kind of new tool and new technology, the inspection of the completion steam turbine valve of energy high-speed high-quality are badly in need of in scene
Repair work.
Utility model content：
Technical problem to be solved in the utility model is：A kind of overcome the deficiencies in the prior art, there is provided steam turbine valve
Milling tool, by rotary grinding disc, impaired face is repaired smooth, it is ensured that contacted between valve seat and valve element tight.
The utility model is for the technical solution adopted for solving the technical problem：
A kind of steam turbine valve milling tool, the steam turbine valve milling tool include abrasive disk, extension bar, grinding
Bar, locating cover, copper sheathing, hex nut, adjustable support and grinding block, the abrasive disk are conical disc, and conical surface surrounding is provided with
There are multiple grinding blocks, be provided with screwed hole among the abrasive disk, the screwed hole among the lower end of the extension bar and abrasive disk
Threaded connection, the upper end of the extension bar are threadedly coupled with the lower end of the milling bar, and the upper end of the milling bar is described in
It is connected after the copper sheathing of locating cover center with low speed electric drill；The internal diameter of the copper sheathing and the extension bar and milling bar it is outer
Footpath matches；Four bar holes are evenly arranged with the locating cover, the correspondence position of four bar holes is respectively arranged with four
Adjustable support, one end of four adjustable supports are extend into four bar holes after being each passed through the edge of locating cover,
And be fixed on by hex nut on locating cover, the other end of four adjustable supports is extend into corresponding to steam turbine valve
Groove in.
The lower end of the extension bar is provided with the first external thread rod, the screw thread among first external thread rod and abrasive disk
Hole is threaded togather；The upper end center position of the extension bar is provided with internal thread groove, and the lower end of the milling bar is set
The second external thread rod is equipped with, second external thread rod is threaded togather with internal thread groove.
The utility model is provided with multiple grinding blocks in the surrounding of grinding discone antenna surface, and grinding block is added by polytetrafluoroethylmaterial material
Work forms, and during grinding, red lead is first applied on polytetrafluoroethylene (PTFE) face, then valve sealing face is ground, repaired with needle file
The contact surface of polytetrafluoroethylene (PTFE), until the shape of polytetrafluoroethylene (PTFE) matches with sealing surface of seat completely, in polytetrafluoroethylene (PTFE) table
Face scab cloth, then carry out repairing the sealing surface of valve seat.
It is at most three big main engine plants that domestic power plant, which uses,（Three big main engine plants are respectively：East steam turbine, Harbin steamer
Machine, Shanghai steam turbine）300MW, 660MW, 1000MW steam turbine, steam turbine valve milling tool is mainly for these equipment.
The utility model was once used for the main vapour of high pressure, regulating valve and the middle pressure of domestic three big main engine plants 300MW, 660MW, 1000MW steam turbines
Combined regulating valve, when Steam Turbine is overhauled, suitable abrasive disk is selected in advance, valve maintenance finds tight sex chromosome mosaicism, directly can
To be handled, it is not necessary to shut down and carry out valve maintenance, versatility is stronger, easy to use, and simple in construction, easy to operate,
With more preferable practicality and economic benefit.
The valve of three big main engine plants has fixed size, and the abrasive disk with model can be with general, if other steamers
Machine valve, the abrasive disk of suitable size is processed, it is also applicable.
The utility model is mainly used in the grinding of steam turbine valve sealing surface of seat, it is electric or hand all can, to vapour
The vertical valve and horizontal valve of turbine are all suitable for.
Brief description of the drawings：
Fig. 1 is structural representation of the present utility model；
Fig. 2 is Fig. 1 top view；
Fig. 3 is the revolved sectional view at A-A in Fig. 2；
Fig. 4 is the structural representation of extension bar in Fig. 1；
Fig. 5 is the structural representation of milling bar in Fig. 1；
Fig. 6 is the structural representation of abrasive disk in Fig. 1.
Embodiment：
The utility model is further explained below in conjunction with the accompanying drawings and explanation：
Referring to Fig. 1~Fig. 6, a kind of steam turbine valve milling tool, including abrasive disk 1, extension bar 2, milling bar 3, positioning
Lid 4, copper sheathing 5, hex nut 6, adjustable support 7 and grinding block 8, abrasive disk 1 are conical disc, and conical surface surrounding has been provided with multiple
Grinding block 8, is provided with screwed hole among abrasive disk 1, the screwed hole threaded connection among the lower end of extension bar 2 and abrasive disk,
The upper end of extension bar 2 is threadedly coupled with the lower end of milling bar 3, and the upper end of milling bar 3 passes through the copper sheathing 5 of the center of locating cover 4
It is connected afterwards with low speed electric drill；The external diameter of the internal diameter of copper sheathing 5 and extension bar 2 and milling bar 3 matches；On locating cover 4 uniformly
Four bar holes 12 are provided with, the correspondence position of four bar holes 12 is respectively arranged with four adjustable supports 7, and four adjustable
One end of support 7 is extend into four bar holes 12 after being each passed through the edge of locating cover 4, and is fixed on by hex nut 6
On locating cover 4, the other end of four adjustable supports 7 is extend into the groove corresponding to steam turbine valve.
The first external thread rod 10, the first external thread rod 10 and the screw thread among abrasive disk are provided with the lower end of extension bar 2
Hole is threaded togather；The upper end center position of extension bar 2 is provided with internal thread groove 9, set in the lower end of milling bar 3
There is the second external thread rod 10, the second external thread rod 10 is threaded togather with internal thread groove 9.
The utility model uses when Steam Turbine is overhauled, and selects the suitable abrasive disk of size, valve maintenance in advance
It was found that tight sex chromosome mosaicism, directly can be carried out handling, it is not necessary to shut down and carry out valve maintenance, versatility is stronger, easy to use,
It is simple in construction, it is easy to operate, there is good practicality.
Above-described is only the preferred embodiment of this patent, it is noted that for those skilled in the art,
Under the premise of this patent general idea is not departed from, some changes and improvements can also be made, these should also be considered as this patent
Protection domain.
Claims (2)
- A kind of 1. steam turbine valve milling tool, it is characterised in that：The steam turbine valve milling tool includes abrasive disk（1）、 Extension bar（2）, milling bar（3）, locating cover（4）, copper sheathing（5）, hex nut（6）, adjustable support（7）And grinding block（8）, institute State abrasive disk（1）For conical disc, conical surface surrounding is provided with multiple grinding blocks（8）, the abrasive disk（1）Centre is provided with screw thread Hole, the extension bar（2）Lower end and abrasive disk among screwed hole be threadedly coupled, the extension bar（2）Upper end with it is described Milling bar（3）Lower end threaded connection, the milling bar（3）Upper end pass through the locating cover（4）The copper sheathing of center（5） It is connected afterwards with low speed electric drill；The copper sheathing（5）Internal diameter and the extension bar（2）And milling bar（3）External diameter match；Institute State locating cover（4）On be evenly arranged with four bar holes（12）, four bar holes（12）Correspondence position be respectively arranged with four Adjustable support（7）, four adjustable supports（7）One end be each passed through locating cover（4）Edge after extend into four Bar hole（12）In, and pass through hex nut（6）It is fixed on locating cover（4）On, four adjustable supports（7）The other end It extend into the groove corresponding to steam turbine valve.
- 2. steam turbine valve milling tool according to claim 1, it is characterised in that：The extension bar（2）Lower end set It is equipped with the first external thread rod（10）, first external thread rod（10）It is threaded togather with the screwed hole among abrasive disk； The extension bar（2）Upper end center position be provided with internal thread groove（9）, the milling bar（3）Lower end be provided with second External thread rod（10）, second external thread rod（10）With internal thread groove（9）It is threaded togather.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720615486.9U CN206717635U (en) | 2017-05-31 | 2017-05-31 | Steam turbine valve milling tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720615486.9U CN206717635U (en) | 2017-05-31 | 2017-05-31 | Steam turbine valve milling tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206717635U true CN206717635U (en) | 2017-12-08 |
Family
ID=60511672
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720615486.9U Active CN206717635U (en) | 2017-05-31 | 2017-05-31 | Steam turbine valve milling tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206717635U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110000618A (en) * | 2017-12-29 | 2019-07-12 | 三门核电有限公司 | Spool has the regulating valve fix tool and restorative procedure of C-shaped ring auxiliary seal |
-
2017
- 2017-05-31 CN CN201720615486.9U patent/CN206717635U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110000618A (en) * | 2017-12-29 | 2019-07-12 | 三门核电有限公司 | Spool has the regulating valve fix tool and restorative procedure of C-shaped ring auxiliary seal |
| CN110000618B (en) * | 2017-12-29 | 2024-02-09 | 三门核电有限公司 | Valve core-provided C-shaped ring auxiliary sealing adjusting valve repairing tool and repairing method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 450000 Zhengzhou, China Central Plains District, North Street, No. 2 West Station Patentee after: China Electrical Construction Group Henan Engineering Co., Ltd. Address before: 450000 Zhengzhou, China Central Plains District, North Street, No. 2 West Station Patentee before: China Electric Power Construction Group Henan engineering company |
|
| CP01 | Change in the name or title of a patent holder |