CN104842130A - Tool special for removing main valve bolt of steam turbine through drilling - Google Patents
Tool special for removing main valve bolt of steam turbine through drilling Download PDFInfo
- Publication number
- CN104842130A CN104842130A CN201410053031.3A CN201410053031A CN104842130A CN 104842130 A CN104842130 A CN 104842130A CN 201410053031 A CN201410053031 A CN 201410053031A CN 104842130 A CN104842130 A CN 104842130A
- Authority
- CN
- China
- Prior art keywords
- steam turbine
- stop valve
- main inlet
- inlet throttle
- specific purpose
- 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.)
- Pending
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B41/00—Boring or drilling machines or devices specially adapted for particular work; Accessories specially adapted therefor
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Turbines (AREA)
Abstract
The invention relates to a tool special for removing a main valve bolt of a stem turbine through drilling. The tool comprises a drilling mechanism and a working table, and the drilling mechanism is mounted on the working table; the axis line of the drilling mechanism coincides with the center of a hole with the bolt required to be drilled, and the drilling mechanism comprises a power head, a coupler, a transmission shaft, a bearing pedestal, a taper sleeve and a drill bit; the transmission shaft is mounted on the bearing pedestal; the taper sleeve is arranged at one end of the transmission shaft, and the other end of the transmission shaft is connected with the power head through the coupler; and the drill bit is mounted in the taper sleeve. Compared with the prior art, the tool has the beneficial effects of being low in labor intensity, high in efficiency, not prone to damaging threads and the like.
Description
Technical field
The present invention relates to a kind of boring except instrument, especially relate to a kind of boring except steam turbine main inlet throttle-stop valve bolt specific purpose tool.
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 the startup of steam turbine and suddenly stops, and the security for unit is most important.The installed capacity of Changshu, Jiangsu Province electricity generating corporation, Ltd is four domestic improvement 330MW units, and every platform steam turbine divides A, and B two main inlet throttle-stop valves, every main inlet throttle-stop valve has the steel alloy bolt of 16 M76X3.Require all main inlet throttle-stop valve bolts all to dismantle in overhaul and carry out gold inspection, due to the impact of the factor such as longtime running 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.The process more complicated of thread Pilot hole and difficulty, can only adopt the method removing bolt under the prerequisite not destroying apparatus body bottom outlet screw thread.
Metal bolts is removed when without generally there being following two kinds of methods when special equipment in machine room scene: 1, progressively melted by metal to excircle gas cutting by bolt-center; 2, progressively dig (mill) with electric hand tool to remove.The length of action need removing bolt is about 100mm, and external diameter is 76mm, have that efficiency is low, labour intensity is high in order to upper method, gas cutting fusing time may the shortcoming such as damage equipment body bottom outlet screw thread.Kill because of main inlet throttle-stop valve bolt in the overhaul that Changshu electricity generating corporation, Ltd is all previous and cannot dismantle and repeatedly have influence on the progress of turnover job.
Summary of the invention
Object of the present invention be exactly provide that a kind of labour intensity is low, efficiency is high to overcome defect that above-mentioned prior art exists, the brill of survivable screw thread is except steam turbine main inlet throttle-stop valve bolt specific purpose tool.
Object of the present invention can be achieved through the following technical solutions:
One brill, except steam turbine main inlet throttle-stop valve bolt specific purpose tool, is characterized in that, comprises and bores except mechanism and workbench, and described brill removes mechanism's installation on the table, and the axial line bored except mechanism bores with needs the hole center superposition removing bolt.
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.
Well cap is provided with between described transmission axle head shaft coupling and bearing block.
Described drill bit is fluted drill.
Described workbench comprises travelling table and stationary work-table, and before described stationary work-table is fixed on main inlet throttle-stop valve, and upper surface has dovetail groove guide rail, and described travelling table is connected with dovetail groove slide.
Described travelling table side is provided with handwheel.
Described unit head and bearing block are bolted on travelling table.
Compared with prior art, the present invention has the following advantages:
1) labour intensity is reduced;
2) improve operating efficiency, reduce by the time of nearly 2/3rds than original method;
3) improve service life, not easily damage equipment body bottom outlet screw thread.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
In Fig. 1,1 be unit head, 2 be shaft coupling, 3 be well cap, 4 be bearing block, 5 be power transmission shaft, 6 be tapered sleeve, 7 be handwheel, 8 be travelling table, 9 for stationary work-table.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.The present embodiment is implemented premised on technical solution of the present invention, give detailed embodiment and concrete operating process, but protection scope of the present invention is not limited to following embodiment.
Embodiment
As shown in Figure 1, one brill, except steam turbine main inlet throttle-stop valve bolt specific purpose tool, comprises and bores except mechanism and workbench, and described brill removes mechanism's installation on the table, and the axial line bored except mechanism bores with needs the hole center superposition removing bolt.
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.Well cap 3 is provided with between described transmission axle head shaft coupling 2 and bearing block 4.Described drill bit is fluted drill.
Described workbench comprises travelling table 8 and stationary work-table 9, and before described stationary work-table 9 is fixed on main inlet throttle-stop valve, and upper surface has dovetail groove guide rail, and described travelling table 8 is connected with dovetail groove slide.
Described unit head 1 and bearing block 4 are bolted on travelling table 8.Described travelling table side is provided with handwheel 7, rotates handwheel 7 and makes drill bit carry out axial feed motion, the close also through occlusion portion length of drilling bolt.
The handwheel 7 rotated backward on travelling table 8 exits drill bit, changes after diameter increases the drill bit of about 10mm and again carries out drilling.Repeat drilling, until take out nubbin close to manual during about the 1 ~ 2mm of footpath at the bottom of bolt.
Claims (8)
1. brill is except a steam turbine main inlet throttle-stop valve bolt specific purpose tool, it is characterized in that, comprises and bores except mechanism and workbench, and described brill removes mechanism's installation on the table, and the axial line bored except mechanism bores with needs the hole center superposition removing bolt.
2. one according to claim 1 is bored except steam turbine main inlet throttle-stop valve bolt specific purpose tool, 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. one according to claim 2 is bored except steam turbine main inlet throttle-stop valve bolt specific purpose tool, and it is characterized in that, described shaft coupling comprises transmission axle head shaft coupling and the power head end shaft coupling of meshing connection.
4. one according to claim 3 is bored except steam turbine main inlet throttle-stop valve bolt specific purpose tool, it is characterized in that, is provided with well cap between described transmission axle head shaft coupling and bearing block.
5. one according to claim 2 is bored except steam turbine main inlet throttle-stop valve bolt specific purpose tool, and it is characterized in that, described drill bit is fluted drill.
6. one according to claim 2 is bored except steam turbine main inlet throttle-stop valve bolt specific purpose tool, it is characterized in that, described workbench comprises travelling table and stationary work-table, before described stationary work-table is fixed on main inlet throttle-stop valve, and upper surface has dovetail groove guide rail, described travelling table is connected with dovetail groove slide.
7. one according to claim 6 is bored except steam turbine main inlet throttle-stop valve bolt specific purpose tool, and it is characterized in that, described travelling table side is provided with handwheel.
8. one according to claim 6 is bored except steam turbine main inlet throttle-stop valve bolt specific purpose tool, and it 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 |
|---|---|---|---|
| CN201410053031.3A CN104842130A (en) | 2014-02-17 | 2014-02-17 | Tool special for removing main valve bolt of steam turbine through drilling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410053031.3A CN104842130A (en) | 2014-02-17 | 2014-02-17 | Tool special for removing main valve bolt of steam turbine through drilling |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104842130A true CN104842130A (en) | 2015-08-19 |
Family
ID=53842315
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410053031.3A Pending CN104842130A (en) | 2014-02-17 | 2014-02-17 | Tool special for removing main valve bolt of steam turbine through drilling |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104842130A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112872780A (en) * | 2021-01-14 | 2021-06-01 | 中广核工程有限公司 | Nuclear power plant's radials surrounding subassembly bolt demolishs device |
-
2014
- 2014-02-17 CN CN201410053031.3A patent/CN104842130A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112872780A (en) * | 2021-01-14 | 2021-06-01 | 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 |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150819 |