CN103267150A - Novel steam-pumping check valve - Google Patents
Novel steam-pumping check valve Download PDFInfo
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- CN103267150A CN103267150A CN201310191032XA CN201310191032A CN103267150A CN 103267150 A CN103267150 A CN 103267150A CN 201310191032X A CN201310191032X A CN 201310191032XA CN 201310191032 A CN201310191032 A CN 201310191032A CN 103267150 A CN103267150 A CN 103267150A
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- check valve
- rocking arm
- extraction check
- novel extraction
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Abstract
The invention relates to a novel steam-pumping check valve, and belongs to the field of thermal power and nuclear power valves. The novel steam-pumping check valve is installed on a steam-pumping pipeline of a turbine of a thermal power and nuclear power unit, and prevents the situation that the steam flows backwards when the turbine sheds load, the turbine exceeds the speed limit, and further terrible accidents are resulted in. The novel steam-pumping check valve adopts a rotary opening type valve clack structure, a valve clack is connected with a rocking arm through a locking nut, and the valve clack is connected with the rocking arm through a self-aligning universal joint and then is hung inside a valve body through a main shaft so that the valve clack can rotate around the main shaft. The valve adopts two sets of follow-up closing and forced closing protection systems which are mutually independent, and when a medium flows backwards, the valve clack is closed automatically. Meanwhile, a pneumatic or hydraulic execution mechanism rapidly releases a control medium after receiving control signals, a spring pushes a piston to move downwards, and acting force is applied to the valve clack through a piston rod, a crank, a forced closing shaft and the rocking arm to forcedly close and seal the valve. The execution mechanism is provided with a manual test valve, can test the flexibility of the piston in service, and prevents a pneumatic (hydraulic) cylinder from being bonded with the piston.
Description
Technical field
The present invention relates to a kind of novel extraction check valve, belong to thermoelectricity, nuclear power valve field.
Background technique
At present, being installed in the extraction check valve that thermoelectricity, nuclear power generating sets extracted steam from turbine pipeline prevent that steam from flowing backwards has following shortcoming, and actuator adopts an axle with flap, or adopts two axles in the outside connection of valve body, causes the stem packing serious wear, easily leaks outside; During valve closing, easily gouge flap, sealing surface of seat leak in producing etc.
Summary of the invention
In view of the defective that prior art exists, the purpose of this invention is to provide a kind of close fast, seal tight, the reliable novel extraction check valve of performance.
For achieving the above object, the technical solution adopted for the present invention to solve the technical problems is: adopt rotary-open type flap structure, flap is connected with rocking arm by locking nut, is suspended in the valve body by main shaft again, and flap can rotate around main shaft.Actuator piston rod is connected with strong pass axle by crank, closes axle and main shaft by force on same axis, and the spring force of actuator acts on the piston, is applied on the flap by piston rod, crank, strong pass axle, rocking arm, forces valve closing to seal.Actuator is provided with manual pet valve can be in the valve running state, and the flexibility of check piston prevents gas (liquid) cylinder pressure and piston space bonding.
Described novel extraction check valve adopts pneumatic, hydraulic actuator, and actuator has under top dress, the side on dress, the side dress, side level adorn four kinds of modes, by the spring positive closing, reaches convenient field erected purpose.
Described novel extraction check valve rocking arm adopts trunk formula structure, adopts between rocking arm and flap from aligning is universal to be connected, and improves valve seal.
Described novel extraction check valve has servo-actuated cutting out and the separate protective system of positive closing two covers, and under any circumstance as long as steam flows backwards, valve is closed immediately, improves the reliability of valve event.
The strong axle that closes is connected by free-wheeling clutch in valve body with rocking arm, reduces the strong axle number of revolutions of closing, and reduces the filler wearing and tearing, avoids steam to leak outside.
The valve flowing channel of described valve is designed to the olive ball-type, and the media flow characteristic is good, and resistance is little.
When steam turbine trips or breaks down, signal is sent in the control room, cut off source of the gas or control liquid rapidly, fast-discharge valve is opened fast and is discharged gas (liquid) cylinder pressure cavity of resorption control media, effect lower piston at spring pressure moves down rapidly, and by clutch moment throttle down, can reach the purpose of quick closedown.
The invention has the beneficial effects as follows: novel extraction check valve has servo-actuated cutting out and protective system that positive closing two cover is separate, the reliability of valve closing when improving medium and flowing backwards; The strong axle that closes is connected by free-wheeling clutch in valve body with rocking arm, reduces the strong axle number of revolutions of closing, and reduces the filler wearing and tearing, avoids steam to leak outside; Adopt trunk formula rocking arm, adopt between rocking arm and flap from aligning is universal to be connected, improve valve seal; Close axle, axle sleeve employing stainless steel by force through cure process, strengthen wear resistance, prevent that closing axle and shaft room by force kills; Actuator is provided with manual pet valve can prevent gas (liquid) cylinder pressure and piston space bonding in the flexibility of X-ray inspection X piston; Actuator adopts pneumatic or surges, and can adopt under top dress, the side on dress, the side dress, side level to adorn four kinds of mode mounting types, reduces on-the-spot installing space.
Description of drawings
The present invention is further described below in conjunction with drawings and Examples.
Fig. 1 is the partial cutaway schematic representation of novel extraction check valve;
Fig. 2 is the structural representation of novel extraction check valve;
Fig. 3 is the trunk formula structure of novel extraction check valve and from the universal linkage structure of aligning
Among the figure, 1. valve body, 2. flap, 3. locking nut, 4. rocking arm, 5. valve seat, 6. main shaft, 7. valve gap, 8. crank, the 9. strong axle that closes, 10. piston rod, 11. manual pet valves, 12. piston cylinders, 13. pistons, 14. springs, 15. fast-discharge valves, 16. axle sleeves
Embodiment
In the embodiment shown in fig. 1, flap 2 is connected with Rocker arm 4 by locking nut 3, is suspended in the valve body 1 by main shaft 6 again, and flap 2 can be around main shaft 6 rotations, according to MEDIA FLOW to, recloser, the follow-up switch function of realization extraction check valve.
In embodiment illustrated in fig. 2, piston rod 12 is connected with the strong axle 9 that closes by crank 8, and the strong axle 9 that closes adopts free-wheeling clutch to be connected with Rocker arm 4.Normal working, the strong axle 9 that closes breaks away from Rocker arm 4, but flap 2 free switch; When steam turbine tripped or breaks down, fast-discharge valve was opened fast and is discharged gas (liquid) cylinder pressure cavity of resorption control media, and spring 14 drives pistons 13 and moves down rapidly, made strong pass axle rotation moment throttle down.When the valve proper functioning, can open manual pet valve 11, make the piston motion, the flexibility of check actuator.
In the embodiment shown in fig. 3, Rocker arm 4 adopts trunk formula structure, reduces colliding with, abrading between flap 2 and valve seat 5 sealing surfaces in the valve closing process, raising valve working life; Rocker arm 4 and flap 2 adopt from the universal Placement of aligning, and when guaranteeing valve closing, flap 2 fits like a glove with valve seat 5 sealing surfaces, reaches excellent sealing.
Claims (7)
1. novel extraction check valve; it is characterized in that: valve has the moving actuator's positive closing of piston type pneumatic (liquid) and the servo-actuated separate protective system of two covers of closing; actuator takes to adorn on dress, the side under top dress, the side, the side level is adorned four kinds of modes, by the spring positive closing.Actuator is connected with the strong axle that closes by piston rod, crank, and flap is connected with rocking arm, is suspended in the valve body by main shaft, and actuator is by the strong free-wheeling clutch control valve switch that closes between axle and rocking arm.
2. novel extraction check valve according to claim 1 is characterized in that: rocking arm adopts trunk formula structure, with between flap by being connected from aligning is universal.
3. novel extraction check valve according to claim 1 is characterized in that: the strong pass axle of described valve is connected by the free-wheeling clutch in the valve body with rocking arm, and valve has servo-actuated close and separate protective system is overlapped in positive closing two.
4. novel extraction check valve according to claim 1 is characterized in that: described valve adopts the moving actuator of gas (liquid), takes under top dress, the side on dress, the side dress, side level to adorn four kinds of modes.
5. novel extraction check valve according to claim 1 is characterized in that: described valve employing direct built-up welding sealing surface of seat or welding-on valve seat on valve body.
6. novel extraction check valve according to claim 1 is characterized in that: manual pet valve is equipped with in the moving actuator of described valve gas (liquid).
7. novel extraction check valve according to claim 1, it is characterized in that: it is streamlined that the runner of described valve is designed to rugby.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310191032XA CN103267150A (en) | 2013-05-14 | 2013-05-14 | Novel steam-pumping check valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310191032XA CN103267150A (en) | 2013-05-14 | 2013-05-14 | Novel steam-pumping check valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103267150A true CN103267150A (en) | 2013-08-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201310191032XA Pending CN103267150A (en) | 2013-05-14 | 2013-05-14 | Novel steam-pumping check valve |
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| CN (1) | CN103267150A (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103851235A (en) * | 2014-02-21 | 2014-06-11 | 武汉圣禹排水系统有限公司 | Rotary interception swing check valve |
| CN104913088A (en) * | 2015-06-03 | 2015-09-16 | 南京年代科技有限公司 | Floating energy saving check valve |
| CN105291248A (en) * | 2015-11-13 | 2016-02-03 | 车国轮 | Gluing device of edge bonding machine |
| CN105757328A (en) * | 2016-05-03 | 2016-07-13 | 锦州新锦化机械制造有限公司 | Control device for main steam valve of horizontal version oil control type steam turbine |
| CN106481851A (en) * | 2016-11-09 | 2017-03-08 | 嘉善永金金属制品有限公司 | A kind of closing organ using in Equipment for Heating Processing |
| CN107101024A (en) * | 2016-02-22 | 2017-08-29 | 浙江大自然旅游用品有限公司 | Valve |
| CN114776846A (en) * | 2022-05-18 | 2022-07-22 | 哈电集团哈尔滨电站阀门有限公司 | Air extraction check valve and flow passage boundary determining method thereof |
| CN115126911A (en) * | 2021-03-24 | 2022-09-30 | 中核苏阀科技实业股份有限公司 | Nuclear power conventional island inclined petal type steam extraction check valve structure with full-stroke position indication function |
| CN115126909A (en) * | 2021-03-24 | 2022-09-30 | 中核苏阀科技实业股份有限公司 | Nuclear power conventional island inclined petal type steam extraction check valve structure with remote monitoring valve position stroke |
| CN116906633A (en) * | 2023-09-14 | 2023-10-20 | 哈电集团哈尔滨电站阀门有限公司 | Steam extraction check valve |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB972870A (en) * | 1961-09-13 | 1964-10-21 | Atwood & Morrill Co Inc | One way check valve |
| CN1236838A (en) * | 1998-05-14 | 1999-12-01 | 株式会社三协精机制作所 | Controller for opening and closing of drain valve |
| CN200955611Y (en) * | 2006-10-08 | 2007-10-03 | 兰州高压阀门有限公司 | Pneumatic air-extraction non-return valve |
| CN201621336U (en) * | 2010-03-01 | 2010-11-03 | 浙江东亚阀门有限公司 | Cushion swing check valve |
| CN102808976A (en) * | 2012-08-16 | 2012-12-05 | 大连大高阀门股份有限公司 | One-section extraction check valve |
| CN202646801U (en) * | 2012-05-28 | 2013-01-02 | 中核苏阀科技实业股份有限公司 | High-flow check valve |
| CN203240023U (en) * | 2013-05-14 | 2013-10-16 | 哈电集团哈尔滨电站阀门有限公司 | Novel steam extraction check valve |
-
2013
- 2013-05-14 CN CN201310191032XA patent/CN103267150A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB972870A (en) * | 1961-09-13 | 1964-10-21 | Atwood & Morrill Co Inc | One way check valve |
| CN1236838A (en) * | 1998-05-14 | 1999-12-01 | 株式会社三协精机制作所 | Controller for opening and closing of drain valve |
| CN200955611Y (en) * | 2006-10-08 | 2007-10-03 | 兰州高压阀门有限公司 | Pneumatic air-extraction non-return valve |
| CN201621336U (en) * | 2010-03-01 | 2010-11-03 | 浙江东亚阀门有限公司 | Cushion swing check valve |
| CN202646801U (en) * | 2012-05-28 | 2013-01-02 | 中核苏阀科技实业股份有限公司 | High-flow check valve |
| CN102808976A (en) * | 2012-08-16 | 2012-12-05 | 大连大高阀门股份有限公司 | One-section extraction check valve |
| CN203240023U (en) * | 2013-05-14 | 2013-10-16 | 哈电集团哈尔滨电站阀门有限公司 | Novel steam extraction check valve |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103851235A (en) * | 2014-02-21 | 2014-06-11 | 武汉圣禹排水系统有限公司 | Rotary interception swing check valve |
| CN104913088A (en) * | 2015-06-03 | 2015-09-16 | 南京年代科技有限公司 | Floating energy saving check valve |
| CN105291248A (en) * | 2015-11-13 | 2016-02-03 | 车国轮 | Gluing device of edge bonding machine |
| CN107101024A (en) * | 2016-02-22 | 2017-08-29 | 浙江大自然旅游用品有限公司 | Valve |
| CN107101024B (en) * | 2016-02-22 | 2020-07-07 | 浙江大自然户外用品股份有限公司 | Valve gate |
| CN105757328A (en) * | 2016-05-03 | 2016-07-13 | 锦州新锦化机械制造有限公司 | Control device for main steam valve of horizontal version oil control type steam turbine |
| CN106481851A (en) * | 2016-11-09 | 2017-03-08 | 嘉善永金金属制品有限公司 | A kind of closing organ using in Equipment for Heating Processing |
| CN115126911A (en) * | 2021-03-24 | 2022-09-30 | 中核苏阀科技实业股份有限公司 | Nuclear power conventional island inclined petal type steam extraction check valve structure with full-stroke position indication function |
| CN115126909A (en) * | 2021-03-24 | 2022-09-30 | 中核苏阀科技实业股份有限公司 | Nuclear power conventional island inclined petal type steam extraction check valve structure with remote monitoring valve position stroke |
| CN114776846A (en) * | 2022-05-18 | 2022-07-22 | 哈电集团哈尔滨电站阀门有限公司 | Air extraction check valve and flow passage boundary determining method thereof |
| CN116906633A (en) * | 2023-09-14 | 2023-10-20 | 哈电集团哈尔滨电站阀门有限公司 | Steam extraction check valve |
| CN116906633B (en) * | 2023-09-14 | 2023-11-24 | 哈电集团哈尔滨电站阀门有限公司 | Steam extraction check valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information |
Address after: Hanan Hanan Industrial Park core area three road 150060 Heilongjiang city of Harbin province No. 6 Applicant after: Harbin Power Plant Valve Co., Ltd. Address before: 150046 Xiangfang City, Harbin Province, the steel pad street, No., No. 1 Applicant before: Harbin Power Plant Valve Co., Ltd. |
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| CB02 | Change of applicant information | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20130828 |
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| WD01 | Invention patent application deemed withdrawn after publication |