CN203726090U - Drilling device applied to steam turbine main throttle valve bolt of nuclear power station - Google Patents
Drilling device applied to steam turbine main throttle valve bolt of nuclear power station Download PDFInfo
- Publication number
- CN203726090U CN203726090U CN201420068574.8U CN201420068574U CN203726090U CN 203726090 U CN203726090 U CN 203726090U CN 201420068574 U CN201420068574 U CN 201420068574U CN 203726090 U CN203726090 U CN 203726090U
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- CN
- China
- Prior art keywords
- brill
- steam turbine
- nuclear power
- stop valve
- power station
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- 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.)
- Expired - Fee Related
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Abstract
The utility model relates to a drilling device applied to a steam turbine main throttle valve bolt of a nuclear power station. The drilling device comprises a drilling mechanism and a working table, the drilling mechanism is installed on the working table, the axis of the drilling mechanism coincides with the center of a hole of a bolt to be drilled, the drilling mechanism comprises a power head, a coupler, a transmission shaft, a bearing seat, a taper sleeve and a drill bit, the transmission shaft is installed on the bearing seat, the taper sleeve is mounted at one end of the transmission shaft, the other end of the transmission shaft is connected with the power head through the coupler, and the drill bit is installed in the taper sleeve. Compared with drilling devices in the prior art, the drilling device has the advantages that the labor strength is low, the efficiency is high, screw threads are not prone to be damaged, and the like.
Description
Technical field
The utility model relates to a kind of boring except instrument, especially relates to a kind of brill removal apparatus for steam turbine for nuclear power station main inlet throttle-stop valve bolt.
Background technology
Turbine high-pressure main inlet throttle-stop valve is the visual plant of steam turbine speed control and safe operation, and its reliability directly has influence on startup and anxious the stopping of steam turbine, most important for the security of unit.The installed capacity of Changshu, Jiangsu Province electricity generating corporation, Ltd is four domestic improvement 330MW units, and every steam turbine divides A, two main inlet throttle-stop valves of B, and every main inlet throttle-stop valve has the steel alloy bolt of 16 M76X3.In overhaul, require all main inlet throttle-stop valve bolts all to dismantle and carry out gold inspection, due to the impact of the factors such as long-term operation and site environment, often occur that bolt and apparatus body kill situation about cannot dismantle, if powerful dismounting meeting causes damage in various degree to apparatus body bottom outlet screw thread.Processing more complicated and the difficulty of thread Pilot hole can only adopt the method for removing bolt under the prerequisite of not destroying apparatus body bottom outlet screw thread.
The on-the-spot metal bolts of removing of machine room generally has following two kinds of methods without special equipment in the situation that: 1, metal is progressively melted to excircle gas cutting by bolt center; 2, progressively digging (mill) with electric hand tool removes.Need to remove the about 100mm of length of action of bolt, external diameter is 76mm, in order to upper method have that efficiency is low, labour intensity is high, may damage equipment body bottom outlet screw thread when gas cutting fusing etc. shortcoming.In all previous overhaul of Changshu electricity generating corporation, Ltd, kill and cannot dismantle the progress that repeatedly has influence on turnover job because of main inlet throttle-stop valve bolt.
Utility model content
The purpose of this utility model is exactly to provide in order to overcome the defect that above-mentioned prior art exists that a kind of labour intensity is low, efficiency is high, the brill removal apparatus for steam turbine for nuclear power station main inlet throttle-stop valve bolt of survivable screw thread.
The purpose of this utility model can be achieved through the following technical solutions:
For a brill removal apparatus for steam turbine for nuclear power station main inlet throttle-stop valve bolt, it is characterized in that, comprise and boring except mechanism and workbench, described brill removes mechanism and is arranged on workbench, and bores axial line and the hole center superposition that needs brill except bolt except mechanism.
Described brill removes mechanism and comprises unit head, shaft coupling, power transmission shaft, bearing block, tapered sleeve and drill bit, described power transmission shaft is arranged on bearing block, tapered sleeve is equipped with in described power transmission shaft one end, and the other end is connected with unit head by shaft coupling, and described drill bit is arranged in tapered sleeve.
Described shaft coupling comprises transmission axle head shaft coupling and the power head end shaft coupling of meshing connection.
Between described transmission axle head shaft coupling and bearing block, be provided with well cap.
Described drill bit is fluted drill.
Described workbench comprises travelling table and stationary work-table, and described stationary work-table is fixed on before main inlet throttle-stop valve, and upper surface has dovetail groove guide rail, and described travelling table and dovetail groove guide rail are slidably connected.
Described travelling table one side is provided with handwheel.
Described unit head and bearing block are bolted on travelling table.
Compared with prior art, the utlity model has following advantage:
1) reduced labour intensity;
2) improved operating efficiency, reduced by nearly 2/3rds time than original method;
3) improved service life, be difficult for damage equipment body bottom outlet screw thread.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model.
In Fig. 1,1 is that unit head, 2 is that shaft coupling, 3 is that well cap, 4 is that bearing block, 5 is that power transmission shaft, 6 is that tapered sleeve, 7 is that handwheel, 8 is that travelling table, 9 is stationary work-table.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the utility model is elaborated.The present embodiment is implemented as prerequisite taking technical solutions of the utility model, provided detailed embodiment and concrete operating process, but protection domain of the present utility model is not limited to following embodiment.
Embodiment
As shown in Figure 1, a kind of brill removal apparatus for steam turbine for nuclear power station main inlet throttle-stop valve bolt, comprises and boring except mechanism and workbench, described brill removes mechanism and is arranged on workbench, and bores axial line and the hole center superposition that needs brill except bolt except mechanism.
Described brill removes mechanism and comprises unit head 1, shaft coupling 2, power transmission shaft 5, bearing block 4, tapered sleeve 6 and drill bit, described power transmission shaft 5 is arranged on bearing block 4, tapered sleeve 6 is equipped with in described power transmission shaft 5 one end, and the other end is connected with unit head 1 by shaft coupling 2, and described drill bit is arranged in tapered sleeve 6.
Described shaft coupling 2 comprises transmission axle head shaft coupling 2 and the power head end shaft coupling 2 of meshing connection.Between described transmission axle head shaft coupling 2 and bearing block 4, be provided with well cap 3.Described drill bit is fluted drill.
Described workbench comprises travelling table 8 and stationary work-table 9, and described stationary work-table 9 is fixed on before main inlet throttle-stop valve, and upper surface has dovetail groove guide rail, and described travelling table 8 is slidably connected with dovetail groove guide rail.
Described unit head 1 and bearing block 4 are bolted on travelling table 8.Described travelling table one side is provided with handwheel 7, rotates handwheel 7 and makes drill bit carry out axial feed motion, approaches and drilling bolt perforation occlusion portion length.
The handwheel 7 rotating backward on travelling table 8 exits drill bit, changes after diameter increases the drill bit about 10mm and again carries out drilling.Repeat drilling, until the manual nubbin that takes out while approaching at the bottom of bolt 1～2mm left and right, footpath.
Claims (8)
1. for a brill removal apparatus for steam turbine for nuclear power station main inlet throttle-stop valve bolt, it is characterized in that, comprise and boring except mechanism and workbench, described brill removes mechanism and is arranged on workbench, and bores axial line and the hole center superposition that needs brill except bolt except mechanism.
2. a kind of brill removal apparatus for steam turbine for nuclear power station main inlet throttle-stop valve bolt according to claim 1, it is characterized in that, described brill removes mechanism and comprises unit head, shaft coupling, power transmission shaft, bearing block, tapered sleeve and drill bit, described power transmission shaft is arranged on bearing block, tapered sleeve is equipped with in described power transmission shaft one end, the other end is connected with unit head by shaft coupling, and described drill bit is arranged in tapered sleeve.
3. a kind of brill removal apparatus for steam turbine for nuclear power station main inlet throttle-stop valve bolt according to claim 2, is characterized in that, described shaft coupling comprises transmission axle head shaft coupling and the power head end shaft coupling of meshing connection.
4. a kind of brill removal apparatus for steam turbine for nuclear power station main inlet throttle-stop valve bolt according to claim 3, is characterized in that, between described transmission axle head shaft coupling and bearing block, is provided with well cap.
5. a kind of brill removal apparatus for steam turbine for nuclear power station main inlet throttle-stop valve bolt according to claim 2, is characterized in that, described drill bit is fluted drill.
6. a kind of brill removal apparatus for steam turbine for nuclear power station main inlet throttle-stop valve bolt according to claim 2, it is characterized in that, described workbench comprises travelling table and stationary work-table, described stationary work-table is fixed on before main inlet throttle-stop valve, and upper surface has dovetail groove guide rail, described travelling table and dovetail groove guide rail are slidably connected.
7. a kind of brill removal apparatus for steam turbine for nuclear power station main inlet throttle-stop valve bolt according to claim 6, is characterized in that, described travelling table one side is provided with handwheel.
8. a kind of brill removal apparatus for steam turbine for nuclear power station main inlet throttle-stop valve bolt according to claim 6, is characterized in that, described unit head and bearing block are bolted on travelling table.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420068574.8U CN203726090U (en) | 2014-02-17 | 2014-02-17 | Drilling device applied to steam turbine main throttle valve bolt of nuclear power station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420068574.8U CN203726090U (en) | 2014-02-17 | 2014-02-17 | Drilling device applied to steam turbine main throttle valve bolt of nuclear power station |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203726090U true CN203726090U (en) | 2014-07-23 |
Family
ID=51196195
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420068574.8U Expired - Fee Related CN203726090U (en) | 2014-02-17 | 2014-02-17 | Drilling device applied to steam turbine main throttle valve bolt of nuclear power station |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203726090U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112975363A (en) * | 2021-02-05 | 2021-06-18 | 中广核工程有限公司 | Nuclear power plant's radials surrounding subassembly bolt demolishs device |
-
2014
- 2014-02-17 CN CN201420068574.8U patent/CN203726090U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112975363A (en) * | 2021-02-05 | 2021-06-18 | 中广核工程有限公司 | Nuclear power plant's radials surrounding subassembly bolt demolishs device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140723 Termination date: 20180217 |