CN203702268U - Regulating valve provided with locking devices - Google Patents
Regulating valve provided with locking devices Download PDFInfo
- Publication number
- CN203702268U CN203702268U CN201420109087.1U CN201420109087U CN203702268U CN 203702268 U CN203702268 U CN 203702268U CN 201420109087 U CN201420109087 U CN 201420109087U CN 203702268 U CN203702268 U CN 203702268U
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- China
- Prior art keywords
- valve
- equalizing
- connecting sleeve
- rod
- locking device
- 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.)
- Expired - Fee Related
Links
- 230000001105 regulatory effect Effects 0.000 title abstract 6
- 238000006073 displacement reaction Methods 0.000 claims abstract description 14
- 230000000694 effects Effects 0.000 description 6
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000010977 unit operation Methods 0.000 description 3
- 210000004907 gland Anatomy 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000005381 potential energy Methods 0.000 description 1
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- Lift Valve (AREA)
- Control Of Turbines (AREA)
Abstract
The utility model provides a regulating valve provided withlocking devices, relates to a steam regulating valve provided with a piloted valve, particularly to the steam regulating valve provided with the locking devices and the piloted valve, and is used for supplying steam to a steam turbine and regulating the steam supply quantity. The regulating valve comprises a control base, a connecting sleeve, the piloted valve, a main valve and a valve body, wherein the control base is fixedly connected with the upper end of a valve rod of the piloted valve through the connecting sleeve, the lower end of the valve rod of the piloted valve is movably arranged in a valve disc of the main valve in a small displacement manner, the valve rod of the piloted valve and the valve disc of the main valve are movably arranged in the valve body, an anti-rotation device is arranged between the control base and the valve body, one locking device is arranged between the control base and the connecting sleeve, the other locking device is arranged between the connecting sleeve and the valve rod of the piloted valve, and an anti-rotation device is arranged between the valve rod of the piloted valve and the valve disc.
Description
Technical field
The utility model provides a kind of steam regulation valve, is a kind of steam regulation valve with equalizing valve, specifically, is a kind of steam regulation valve with locking device and equalizing valve, for the steam supplying amount to steam turbine steam supply and steam regulation.
Background technique
Turbine Steam source pressure is large, temperature is higher.For reducing the lifting resistance of steam regulation valve valve rod in steam turbine start-up course, conventionally in steam turbine steam regulation valve, equalizing valve is set, its effect is when main valve does not also move, equalizing valve moves in advance, after equalizing valve is opened, have small flow steam and arrive main valve by equalizing valve core, to reduce main valve front and back pressure reduction, the lifting resistance that effectively reduces steam regulation valve valve rod, is beneficial to the smooth unlatching of main valve.After equalizing valve is opened completely, main valve is opened gradually under the drive of valve rod.
When steam turbine moves under some operating mode, single or multiple servo valves are in complete opening state, but always in adjustment state.Under this operating mode, move for a long time, due to the disturbance of unstable air-flow, cause the horizontal or extensional vibration that valve rod is strong, traditional steam regulation valve, owing to can Angular Displacement relatively rotating between valve rod and valve disc, the stressed frictional force that is not enough to overcome spheric seating on connecting sleeve of valve rod, spheric seating does not rotate and causes threaded stem joint to be directly subject to the effect of pulsating force.Valve rod long-term jitter, can cause the connecting thread of connecting sleeve and valve rod to screw out or damage, and stop pin is subject to stress shear deformation or disconnection, causes valve disc to come off, and serious threat is to the safe operation of unit.
Summary of the invention
The purpose of this utility model is to provide a kind of steam regulation valve with locking device and equalizing valve, for the steam supplying amount to steam turbine steam supply and steam regulation, to improve the Security of unit operation.
The purpose of this utility model is to be achieved through the following technical solutions:
This steam regulation valve with locking device, comprise and handle seat, connecting sleeve, equalizing valve, main valve and valve body, the upper end of handling seat and equalizing valve valve rod connects firmly by connecting sleeve, the little displacement in lower end of equalizing valve valve rod is moved and is arranged in main valve valve disc, equalizing valve valve rod and main valve valve disc move and are arranged in valve body, between manipulation seat and valve body, anti-rotation device is set, between manipulation seat and connecting sleeve, locking device is set, between connecting sleeve and equalizing valve valve rod, locking device is set, between equalizing valve valve rod and valve disc, anti-rotation device is set.
The beneficial effects of the utility model are:
Adopt anti-rotation, locking device at many places connection part, effectively reduce the effect of the pulsating force that threaded stem and connecting sleeve joint be directly subject to, ensure that threaded stem is reliably connected in steam regulation valve working procedure with connecting sleeve, valve disc can not come off, and improves the Security of unit operation.
Handle for better realizing steam regulation valve the reliability connecting between seat, equalizing valve, main valve, anti-rotation, locking having relatively high expectations that each connection part connects require to be easy to realize simultaneously.
As one of improvement to this steam regulation valve with locking device, stop pin is set handling between seat and valve body, to overcome the relative angular displacement of handling between seat and valve body, reduce to handle seat to handling the impact of seat operating handle and connecting sleeve.
As two of the improvement to this steam regulation valve with locking device, handle seat operating handle and connecting sleeve employing screw thread pay connect firmly and arrange that pin anti-rotation is locking on screw thread is paid, connecting sleeve and manipulation seat use at least one bolt to connect firmly.Ensure screw thread pay reliable connection and handle seat operating handle guide function.
As three of the improvement to this steam regulation valve with locking device, between connecting sleeve and equalizing valve valve rod, adopt the location at spherical surface matching and adopt locknut to connect firmly, straight pin anti-rotation is set between locknut and screw rod locking, misaligns to eliminate manipulation seat and valve rod the impact causing.
As four of the improvement to this steam regulation valve with locking device, between equalizing valve valve rod and valve disc, be that the little displacement in lower end that equalizing valve valve rod is realized in polygonal axle and hole is moved and is arranged in main valve valve disc by corresponding cross section.This structure, can effectively reduce relatively rotating between equalizing valve valve rod and valve disc, reduces the impact of equalizing valve valve rod for valve rod connecting thread.Certainly, rotation prevention structure herein also can adopt: the little displacement in lower end that realizes equalizing valve valve rod by corresponding key and keyway between equalizing valve valve rod and valve disc is moved and is arranged in main valve valve disc.
Brief description of the drawings
Fig. 1 is the structural representation of this steam regulation valve with locking device
Fig. 2 is the A-A sectional view of Fig. 1
Fig. 3 is the structural representation of upper and lower briquetting
Fig. 4 is that equalizing valve starts schematic diagram
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail:
Referring to this steam regulation valve with locking device shown in Fig. 1, Fig. 2, Fig. 3, Fig. 4, main body forms by handling seat 2, connecting sleeve, 11 equalizing valves 17, main valve 15 and valve body 13, handles seat 2, equalizing valve 17 and main valve 15 and is arranged in valve body 13.The upper end of handling seat 2 and equalizing valve valve rod 8 connects firmly by connecting sleeve 11, the little displacement in lower end of equalizing valve valve rod 8 is moved and is arranged in main valve valve disc 16, main valve valve disc 16 moves and is arranged in the gland sleeve 14 that can be considered valve body 13 parts, between valve disc 16 and gland sleeve 14, have guiding groove not relatively rotate, equalizing valve valve rod 8 moves and is arranged in valve body 13.Be more than prior art, no longer describe in detail.
Anti-rotation device is set handling between seat 2 and valve body 13, to overcome the relative angular displacement of handling between seat 2 and valve body 13, reduces to handle seat 2 to handling the impact of seat operating handle 1 and connecting sleeve 11.This device has multiple, considers Economy and is easy to and realize, and anti-rotation device is selected stop pin 3.
Between manipulation seat 2 and connecting sleeve 11, locking device is set, embodiment is, handle seat operating handle 1 and connecting sleeve 11 and adopt screw thread to pay 5 to connect firmly and pay and on 5, arrange that pin 4 anti-rotations are locking, connecting sleeve 11 uses at least one (generally selecting four) bolt 6 to connect firmly with handling seat 2 at screw thread, to ensure that screw thread pays the 5 reliable guide functions that connect and handle seat operating handle 1.
Between connecting sleeve 11 and equalizing valve valve rod 8, locking device is set, embodiment is, between connecting sleeve 11 and equalizing valve valve rod 8, adopt two spheric seatings that match locate and adopt locknut 7 to connect firmly, straight pin 9 anti-rotations are set between locknut 7 and equalizing valve valve rod 8 locking, misalign to eliminate manipulation seat 2 and valve rod 8 impact that causes unbalance stress.The structure of two spheric seatings is, connecting sleeve 11 bottom upper and lower faces are all provided with concave spherical surface, the protruding sphere matching with two concave spherical surfaces is respectively arranged on upper and lower briquetting 10,12, on briquetting 10,12, is plane (shown in Figure 3) perpendicular to the another side relative with protruding sphere of sphere normal.
Between equalizing valve valve rod 8 and valve disc 16, anti-rotation device is set, embodiment is, shown in Figure 2 again, between equalizing valve valve rod 8 and valve disc 16, be that the little displacement in lower end that equalizing valve valve rod is realized in polygonal axle and hole is moved and is arranged in main valve valve disc by corresponding cross section, consider technology capability, polygonal is taked square, simultaneously, also consider the passage needs of small flow steam when equalizing valve valve rod and valve disc thermal expansion and equalizing valve start, corresponding cross section is between polygonal, to leave certain interval B, this gap B posterior infromation is 0.5-0.6mm.This structure, although corresponding cross section is to leave 0.5-0.6mm gap between polygonal, but, relative angular displacement between equalizing valve valve rod and the valve disc causing because of this gap is less, simultaneously, valve rod is elongate rod, and from the torsional elasticity meter of system, the shake of equalizing valve valve rod can effectively reduce for the impact of valve rod connecting thread.Certainly, rotation prevention structure herein also can adopt: the little displacement in lower end that realizes equalizing valve valve rod by corresponding key and keyway between equalizing valve valve rod and valve disc is moved and is arranged in main valve valve disc.
Below the use of this steam regulation valve with locking device is made an explanation:
Referring to Fig. 1, Fig. 4, in figure, double-head arrow direction is depicted as a large amount of steam circulating directions.
Make to open in the steam regulation valve with locking device of closed condition, when main valve does not also move, equalizing valve moves in advance, after equalizing valve is opened, have small flow steam and arrive main valve by equalizing valve core, to reduce main valve front and back pressure reduction, be conducive to the smooth unlatching of main valve.When after equalizing valve standard-sized sheet (valve rod is that equalizing valve stroke E is generally 5mm with respect to the stroke of valve disc), main valve (valve disc) is opened gradually under the effect of valve rod pulling force again.Want to close the steam regulation valve with locking device, cancel the pulling force of valve rod to main valve (valve disc), under interior energy (elastic potential energy of the spring) effect of the steam regulation valve with locking device self deposit, under push away valve disc, close the steam regulation valve with locking device.
The beneficial effects of the utility model are: adopt anti-rotation, locking device at many places connection part, effectively reduce the effect of the pulsating force that threaded stem and connecting sleeve joint be directly subject to, ensure that threaded stem is reliably connected in steam regulation valve working procedure with connecting sleeve, valve disc can not come off, and improves the Security of unit operation.
Claims (6)
1. the steam regulation valve with locking device, comprise and handle seat, connecting sleeve, equalizing valve, main valve and valve body, the upper end of handling seat and equalizing valve valve rod connects firmly by connecting sleeve, the little displacement in lower end of equalizing valve valve rod is moved and is arranged in main valve valve disc, equalizing valve valve rod and main valve valve disc move and are arranged in valve body, it is characterized in that, between manipulation seat and valve body, anti-rotation device is set, between manipulation seat and connecting sleeve, locking device is set, between connecting sleeve and equalizing valve valve rod, locking device is set, between equalizing valve valve rod and valve disc, anti-rotation device is set.
2. the steam regulation valve with locking device according to claim 1, is characterized in that, described is to handle between seat and valve body stop pin is set anti-rotation device is set between manipulation seat and valve body.
3. the steam regulation valve with locking device according to claim 1, it is characterized in that, described handle between seat and connecting sleeve, arrange locking device be handle seat operating handle and connecting sleeve employing screw thread pay connect firmly and arrange that pin anti-rotation is locking on screw thread is paid, connecting sleeve and manipulation seat use at least one bolt to connect firmly.
4. the steam regulation valve with locking device according to claim 1, it is characterized in that, described is between connecting sleeve and equalizing valve valve rod, adopt the location at spherical surface matching and adopt locknut to connect firmly locking device is set between connecting sleeve and equalizing valve valve rod, straight pin anti-rotation is set between locknut and screw rod locking.
5. the steam regulation valve with locking device according to claim 1, it is characterized in that, the described anti-rotation device that arranges between equalizing valve valve rod and valve disc is between equalizing valve valve rod and valve disc to be that the little displacement in lower end that equalizing valve valve rod is realized in polygonal axle and hole is moved and is arranged in main valve valve disc by corresponding cross section.
6. the steam regulation valve with locking device according to claim 1, it is characterized in that, the described anti-rotation device that arranges between equalizing valve valve rod and valve disc is that the little displacement in lower end that realizes equalizing valve valve rod by corresponding key and keyway between equalizing valve valve rod and valve disc is moved and is arranged in main valve valve disc.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420109087.1U CN203702268U (en) | 2014-03-12 | 2014-03-12 | Regulating valve provided with locking devices |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420109087.1U CN203702268U (en) | 2014-03-12 | 2014-03-12 | Regulating valve provided with locking devices |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203702268U true CN203702268U (en) | 2014-07-09 |
Family
ID=51052723
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420109087.1U Expired - Fee Related CN203702268U (en) | 2014-03-12 | 2014-03-12 | Regulating valve provided with locking devices |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203702268U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104454037A (en) * | 2014-10-24 | 2015-03-25 | 东方电气集团东方汽轮机有限公司 | Connecting structure for valve rod and crossed sleeve of turbine high-pressure main steam regulating valve |
| CN108915794A (en) * | 2018-08-28 | 2018-11-30 | 河北大唐国际迁安热电有限责任公司 | High pitch anti-dropout specific purpose tool |
-
2014
- 2014-03-12 CN CN201420109087.1U patent/CN203702268U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104454037A (en) * | 2014-10-24 | 2015-03-25 | 东方电气集团东方汽轮机有限公司 | Connecting structure for valve rod and crossed sleeve of turbine high-pressure main steam regulating valve |
| CN108915794A (en) * | 2018-08-28 | 2018-11-30 | 河北大唐国际迁安热电有限责任公司 | High pitch anti-dropout specific purpose tool |
| CN108915794B (en) * | 2018-08-28 | 2023-08-18 | 河北大唐国际迁安热电有限责任公司 | Special anti-drop tool for high-speed door |
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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 |
Granted publication date: 20140709 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |