CN202280482U - Quick closing valve for steam turbine - Google Patents
Quick closing valve for steam turbine Download PDFInfo
- Publication number
- CN202280482U CN202280482U CN2011203724990U CN201120372499U CN202280482U CN 202280482 U CN202280482 U CN 202280482U CN 2011203724990 U CN2011203724990 U CN 2011203724990U CN 201120372499 U CN201120372499 U CN 201120372499U CN 202280482 U CN202280482 U CN 202280482U
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- Prior art keywords
- valve
- steam turbine
- quick
- piston
- oil cylinder
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Abstract
The utility model relates to a quick closing valve for a steam turbine, which solves the problems that the conventional quick closing valve is poorer in operation stability, cannot be used for quick closing and protection effectively and timely and causes loss easily. The quick closing valve includes a valve body and an oil cylinder, wherein a valve seat, a main valve disc, a valve rod and a filter screen are arranged in the valve body. The quick closing valve is characterized in that a piston component connected with the valve rod is arranged in the oil cylinder; an oil inlet quick closing pipe is arranged on the left side of the piston component in the oil cylinder; an oil inlet starting pipe is arranged on the right side of the piston component; an oil return pipe is also arranged between the oil inlet quick closing pipe and the oil inlet starting pipe; a sleeve and a bushing are sleeved at the outer part of the valve rod; and an air leakage channel is also formed on the valve body. The quick closing valve for the steam turbine is safe and reliable to use, and can guarantee the safety during the use of the steam turbine effectively.
Description
Technical field
The utility model belongs to the steam turbine field, especially a kind of steam turbine quick-closing valve.
Background technique
Quick-closing valve is also referred to as main inlet throttle-stop valve, and it is the main closing mechanism device between major steam line and the steam turbine, when the state of emergency, can cut off the admission of steam turbine immediately, makes the unit quick shutdown.The quick-closing valve level is assemblied in steam turbine air chamber side.According to the difference of steam turbine admission volume flow, steam turbine configurable one or two quick-closing valves.Quick-closing valve is closed during halt turbines, is in full-gear in steam turbine starting and normal operation period quick-closing valve.Existing steam turbine quick-closing valve working stability is relatively poor, can not play speed timely and effectively and close protective action, causes damage easily.
The model utility content
The utility model provides a kind of steam turbine quick-closing valve to the defective that existing technology exists, and can react various faults timely and effectively, plays a protective role, and reduces loss.
For this reason; The utility model is taked following technological scheme: a kind of steam turbine quick-closing valve, comprise valve body and oil cylinder, and be provided with valve seat, main valve dish, valve rod and filter screen in the valve body; It is characterized in that being provided with in the described oil cylinder piston assembly that joins with valve rod; The left side of said oil cylinder inner carrier assembly has speed and closes oily inlet pipe, and the right side of said piston assembly has and starts oily inlet pipe, and said speed is closed oil and started and also is provided with return tube between the oily inlet pipe; Described valve rod outside is nested with sleeve and lining, also has leakage path on the said valve body.The chamber of initial steam before steam filter screen passes to the main valve dish when quick-closing valve is not opened, valve disc is pressed on the valve seat under the power of the closing effect of steam power and piston assembly medi-spring, and the path that initial steam gets into Turbine Flow Path is cut off.In the quick-closing valve opening process or quick-closing valve close the back (separating valve does not close) some steam along the gap between valve rod and sleeve and the lining to external leakage, the leakage vapour draw from leakage path.And behind the quick-closing valve standard-sized sheet, the sealing surface of main valve dish and sleeve fits tightly, and valve stem leakoff is blocked.
Described piston assembly comprises piston and the piston plate that cooperatively interacts, and is provided with Returnning spring in the piston, and described piston plate and valve rod join.Oil cylinder partly is the actuator of quick-closing valve opening and closing.When quick-closing valve was opened in the operation of closing control gear through speed, the corresponding following action of oil cylinder part: start oily F and pass to the piston right-hand member, piston overcame spring force and is pressed towards piston plate under the oil pressure effect; Piston is contacted with the sealing surface of piston plate; Speed is closed oily E and is fed the piston plate left side afterwards, along with the fast foundation of closing oil pressure in piston plate rear portion, starts oil and begins that releasing of control arranged; So piston plate and piston such as same integrated member are under the oil pressure difference effect of both sides; Continue to move right until limited, because the valve rod right-hand member is to link together with piston plate, so quick-closing valve is also just opened when piston plate moves thereupon.Closing by security system of quick-closing valve handled; If the action of speed pass takes place in any one link in the security system; The capital makes speed close oily decompression, and under the spring force effect, piston and piston plate are thrown off; The speed in piston plate left side is closed oil from the T1 discharge, and piston plate is pushed to closed position at once together with valve rod, valve disc.The piston plate that is fixed on the valve rod has multiple function: close oil when leaking just in case cylinder seal spare damages speed, it can stop that oil is sprayed onto high-temperature part; Stop that valve stem leakoff is to oil cylinder; The trigger of double as position limit switch.
On the described main valve dish eye bolt is installed.In the main valve dish eye bolt is housed, is in closed condition owing in the opening process of quick-closing valve, regulate steam valve, so along with the lifting of eye bolt, the pressure before and after the main valve dish tends to balance very soon, the lifting force that makes the main valve dish open greatly reduces.
Also be provided with the quick-closing valve Testing institute of forming by test piston, pet valve and pressure gauge in the described oil cylinder, and have the test oil inlet pipe in the oil cylinder right part.The effect of quick-closing valve Testing institute is the reliability in the action of unit operation intermediate survey quick-closing valve.
Described filter screen is the filter screen of stainless steel waveform steel coil strip around structure.Also there is the filter screen of some steam turbine to form by stainless steel coiled sheet weldering with holes.
The steam turbine quick-closing valve of the utility model is safe and reliable, can effectively ensure the Security of steam turbine using process.
Description of drawings
Fig. 1 is the structural representation of the utility model.
Embodiment
Steam turbine quick-closing valve as shown in Figure 1; Comprise the valve gap 8 that connects valve body 1 and oil cylinder 15; Be provided with valve seat 2, main valve dish 3, valve rod 9 and filter screen 5 in the valve body 1, be provided with the piston assembly that joins with valve rod 9 in the oil cylinder 15, piston assembly comprises the piston 13 and piston plate 11 that cooperatively interacts; Be provided with Returnning spring 12 in the piston 13, piston plate 11 joins with valve rod 9.The left side of oil cylinder 15 inner carrier assemblies has speed and closes oily inlet pipe E, and the right side of piston assembly has and starts oily inlet pipe F, and speed is closed oil and started and also is provided with return tube T1 between the oily inlet pipe.Valve rod 9 outsides are nested with sleeve 6 and lining 7, also have leakage path K on the valve body 1.Eye bolt 4 is installed on the main valve dish 3.Also be provided with the quick-closing valve Testing institute of forming by test piston 14, pet valve and pressure gauge in the oil cylinder 15, and have test oil inlet pipe H1 in the oil cylinder right part.Oil cylinder 15 is fixed on the valve gap 8 through bolt 16 and nut 10, and the middle part of valve gap has oil leaking hole T2, and filter screen is the filter screen of stainless steel waveform steel coil strip around structure.
The chamber of initial steam before steam filter screen passes to the main valve dish when quick-closing valve is not opened, valve disc is pressed on the valve seat under the power of the closing effect of steam power and Returnning spring, and the path that initial steam gets into Turbine Flow Path is cut off.In the quick-closing valve opening process or quick-closing valve close the back (separating valve does not close) some steam along the gap between valve rod and sleeve and the lining to external leakage, the leakage vapour draw from leakage path.And behind the quick-closing valve standard-sized sheet, the sealing surface of main valve dish and sleeve fits tightly, and valve stem leakoff is blocked.
Oil cylinder partly is the actuator of quick-closing valve opening and closing.When quick-closing valve was opened in the operation of closing control gear through speed, the corresponding following action of oil cylinder part: start oily F and pass to the piston right-hand member, piston overcame spring force and is pressed towards piston plate under the oil pressure effect; Piston is contacted with the sealing surface of piston plate; Speed is closed oily E and is fed the piston plate left side afterwards, along with the fast foundation of closing oil pressure in piston plate rear portion, starts oil and begins that releasing of control arranged; So piston plate and piston such as same integrated member are under the oil pressure difference effect of both sides; Continue to move right until limited, because the valve rod right-hand member is to link together with piston plate, so quick-closing valve is also just opened when piston plate moves thereupon.Closing by security system of quick-closing valve handled; If the action of speed pass takes place in any one link in the security system; The capital makes speed close oily decompression, and under the spring force effect, piston and piston plate are thrown off; The speed in piston plate left side is closed oil from the T1 discharge, and piston plate is pushed to closed position at once together with valve rod, valve disc.The piston plate that is fixed on the valve rod has multiple function: close oil when leaking just in case cylinder seal spare damages speed, it can stop that oil is sprayed onto high-temperature part; Stop that valve stem leakoff is to oil cylinder; The trigger of double as position limit switch.
What need particularly point out is; The mode of the foregoing description only limits to describe embodiment; But the utility model is confined to aforesaid way incessantly; And those skilled in the art can modify in the scope that does not break away from the utility model in view of the above easily, so the scope of the utility model should comprise the principle that the utility model discloses and the maximum magnitude of new feature.
Claims (5)
1. steam turbine quick-closing valve; Comprise valve body and oil cylinder; Be provided with valve seat, main valve dish, valve rod and filter screen in the valve body, it is characterized in that being provided with in the described oil cylinder piston assembly that joins with valve rod, the left side of said oil cylinder inner carrier assembly has speed and closes oily inlet pipe; The right side of said piston assembly has and starts oily inlet pipe, and said speed is closed oil and started and also is provided with return tube between the oily inlet pipe; Described valve rod outside is nested with sleeve and lining, also has leakage path on the said valve body.
2. a kind of steam turbine quick-closing valve according to claim 1 is characterized in that described piston assembly comprises piston and the piston plate that cooperatively interacts, and is provided with Returnning spring in the piston, and described piston plate and valve rod join.
3. a kind of steam turbine quick-closing valve according to claim 2 is characterized in that on the described main valve dish eye bolt being installed.
4. according to claim 1 or 3 described a kind of steam turbine quick-closing valves, it is characterized in that also being provided with the quick-closing valve Testing institute of forming by test piston, pet valve and pressure gauge in the described oil cylinder, and have the test oil inlet pipe in the oil cylinder right part.
5. a kind of steam turbine quick-closing valve according to claim 1 is characterized in that described filter screen is the filter screen of stainless steel waveform steel coil strip around structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203724990U CN202280482U (en) | 2011-09-30 | 2011-09-30 | Quick closing valve for steam turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203724990U CN202280482U (en) | 2011-09-30 | 2011-09-30 | Quick closing valve for steam turbine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202280482U true CN202280482U (en) | 2012-06-20 |
Family
ID=46226655
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203724990U Expired - Lifetime CN202280482U (en) | 2011-09-30 | 2011-09-30 | Quick closing valve for steam turbine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202280482U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107806522A (en) * | 2017-11-25 | 2018-03-16 | 浙江杰特优动力机械有限公司 | A kind of steam-extracting type speed closes non-return valve and its method of work |
| CN110500417A (en) * | 2019-09-23 | 2019-11-26 | 浙江华元汽轮机械有限公司 | Quick-closing valve and its spool |
| CN113847106A (en) * | 2020-06-28 | 2021-12-28 | 上海电气电站设备有限公司 | Steam inlet structure of steam turbine |
-
2011
- 2011-09-30 CN CN2011203724990U patent/CN202280482U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107806522A (en) * | 2017-11-25 | 2018-03-16 | 浙江杰特优动力机械有限公司 | A kind of steam-extracting type speed closes non-return valve and its method of work |
| CN110500417A (en) * | 2019-09-23 | 2019-11-26 | 浙江华元汽轮机械有限公司 | Quick-closing valve and its spool |
| CN110500417B (en) * | 2019-09-23 | 2024-05-17 | 浙江华元汽轮机械有限公司 | Quick-closing valve and valve core thereof |
| CN113847106A (en) * | 2020-06-28 | 2021-12-28 | 上海电气电站设备有限公司 | Steam inlet structure of steam turbine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120620 |