CN102808976A - One-section extraction check valve - Google Patents
One-section extraction check valve Download PDFInfo
- Publication number
- CN102808976A CN102808976A CN2012102918729A CN201210291872A CN102808976A CN 102808976 A CN102808976 A CN 102808976A CN 2012102918729 A CN2012102918729 A CN 2012102918729A CN 201210291872 A CN201210291872 A CN 201210291872A CN 102808976 A CN102808976 A CN 102808976A
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- valve
- cylinder
- main shaft
- section extraction
- arm
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Abstract
The invention belongs to the field of thermal power valves, and particularly relates to an one-section extraction check valve, wherein the piston rod on a cylinder is connected with a main shaft; one end of a valve arm is fixedly connected with the main shaft; the valve arm can rotate around the main shaft; a valve clack is fixed on the valve arm through a fixing nut and a gasket; the valve clack can be closely attached to the sealing surface of the valve; both the valve clack and the valve arm are arranged inside the valve body; a valve deck is fixedly connected with the valve body through a fastening nut; a lifting bolt is arranged on the valve deck; the main shaft is connected with a limit switch; a piston rod penetrates into the cylinder; a piston is connected through a fixing bolt; a spring is arranged at the upper part of the piston; and the rear cover of the cylinder is fixedly connected with the cylinder through a bolt and a stud. The invention has the benefits that the one-section extraction check valve has big passing capability and long service life, and is safe and reliable.
Description
Technical fieldThe present invention relates to one section extraction check valve, belong to the thermoelectricity valve field.
Background techniquePressure during gas-turbine level removal of load in the supercritical thermal power unit in the steam turbine can reduce suddenly, and steam flows backwards and gets into steam turbine in extraction steam pipe and each heater, can cause the serious accident of damaging steam turbine generator.
Summary of the inventionIn view of the defective that prior art exists, the purpose of this invention is to provide that a kind of negotiability is big, long service life, safe and reliable one section extraction check valve.
For realizing above-mentioned purpose, the technical solution that the present invention adopted is: one section extraction check valve, and the piston rod on the cylinder connects main shaft; Valve arm one end is fixedly connected on the main shaft, and the valve arm can rotate around main shaft, flap through set screw nut and spacers on the valve arm; Flap can fit tightly with valve sealing face, and said flap and valve arm all are positioned at valve inner, and valve gap is fixedly connected with valve body through locking nut; Valve gap is provided with lifting bolt, and main shaft connects limit switch, and piston rod penetrates cylinder interior; And through fixing bolt connection piston, piston top is provided with spring, and cylinder back cover is fixedly connected cylinder through bolt with double-screw bolt.
Said valve sealing face angle of inclination is 10 °-20 °.
Said valve material adopts high-temperature alloy steel, valve sealing surface build-up welding cemented carbide.
The inner chamber of said valve body adopts airflow design.
One section extraction check valve, its beneficial effect is: the valve body material adopts high-temperature alloy steel, and the valve sealing surface build-up welding cemented carbide makes valve have performance better anticorrosive and water erosion, cavitation; The angle of valve sealing face is bigger than generally revolving the angle that opens safety check; So reduced greatly because axle that the flap multiple switching causes and the wearing and tearing between the axle sleeve; Reduce the not tight situation of valve seal that causes because of shaft distortion, improved the sealability of valve, prolonged its working life; Body cavity adopts airflow design, and negotiability is big, reduces the valve resistance, effectively reduces the valve crushing; Valve seal face tilt several angle (10 °-20 °) has increased medium active force to the flap back side in the process that flows backwards, thereby has improved the closing function of valve in counter-current process; Reduce the shut-in time, alleviate impact, reduce noise; Protection equipment itself and pipe safety; The angle of valve sealing face is bigger than generally revolving the angle that opens safety check simultaneously, so reduced greatly because axle that the flap multiple switching causes and the wearing and tearing between the axle sleeve have reduced the not tight situation of valve seal that causes because of shaft distortion; Improve the sealability of valve, prolonged its working life; Actuator is a spring reset formula cylinder, guarantees under the abnormal conditions such as valve can flow backwards at pipeline medium, outage, accident, and this valve was closed in effect following moment of cylinder spring; Shut-in time was less than 0.5 second; Thereby guarantee the safety of visual plants such as gas-turbine, water pump, and the valve closing member action is relatively independent, actuator's fault does not influence closure member; Start-stop device is provided with position-limit mechanism simultaneously, avoids valve under the unsettled situation of pressure medium, to open and close the position and causes the valve internals to damage.
Description of drawings
Fig. 1 is the structural representation of one section extraction check valve;
Fig. 2 is the partial sectional view of one section extraction check valve;
Fig. 3 is one section extraction check valve.
Reference character is following: 1, valve body, 2, flap, 3, the valve arm, 4, pad, 5, set screw nut; 6, main shaft, 7, locking nut, 8, valve gap, 9, lifting bolt, 10, piston rod; 11, spring, 12, piston, 13, fixing bolt, 14, cylinder, 15, cylinder back cover; 16, limit switch, 17, valve sealing face, 18, bolt, 19, double-screw bolt.
Embodiment
Below in conjunction with accompanying drawing one section extraction check valve is done and to be specified: the piston rod 10 on the cylinder 14 connects main shafts 6, and valve arm 3 one ends are fixedly connected on the main shaft 6, and valve arm 3 can rotate around main shaft 6; Flap 2 is fixed on the valve arm 3 through set screw nut 5 and pad 4; Flap 2 can fit tightly with valve sealing face 17, and said flap 2 and valve arm 3 all are positioned at valve body 1 inside, and valve gap 8 is fixedly connected with valve body 1 through locking nut 7; Valve gap 8 is provided with lifting bolt 9; Main shaft 6 connects limit switch 16, and piston rod 10 penetrates cylinder 14 inside, and connects piston 12 through fixing bolt 13; Piston 12 tops are provided with spring 11, and cylinder back cover 15 is fixedly connected cylinder 14 through bolt 18 with double-screw bolt 19.
Actuator is a spring reset formula cylinder; Guarantee under the abnormal conditions such as valve can flow backwards at pipeline medium, outage, accident that this valve was closed in effect following moment of cylinder spring, the shut-in time was less than 0.5 second; Thereby guarantee the safety of visual plants such as gas-turbine, water pump; And the valve closing member action is relatively independent, and actuator's fault does not influence closure member, and start-stop device is provided with position-limit mechanism simultaneously; Avoiding valve under the unsettled situation of pressure medium, to open and close the position causes the valve internals to damage the working life of having improved valve; Valve closes the active force that produces when axle is pressed by force in receiving medium; Because thereby strong extension of closing axle makes it act on the resistance that has received when having reduced valve on the thrust-bearing on the valve rack and having opened; Simultaneously strong extension of closing axle reduces the area of contact between itself and the filler as much as possible in proof strength, thereby reduces resistance, guarantees the flexibility of valve in opening-closing process; Improve the fast-response of valve closing and closed ability, improved the reliability of valve event.
Claims (4)
1. one section extraction check valve; It is characterized in that: the piston rod (10) on the cylinder (14) connects main shaft (6), and valve arm (3) one ends are fixedly connected on the main shaft (6), and valve arm (3) can rotate around main shaft (6); Flap (2) is fixed on the valve arm (3) through set screw nut (5) and pad (4); Flap (2) can fit tightly with valve sealing face (17), and said flap (2) and valve arm (3) all are positioned at valve body (1) inside, and valve gap (8) is fixedly connected with valve body (1) through locking nut (7); Valve gap (8) is provided with lifting bolt (9); Main shaft (6) connects limit switch (16), and piston rod (10) penetrates cylinder (14) inside, and connects piston (12) through fixing bolt (13); Piston (12) top is provided with spring (11), and cylinder back cover (15) is fixedly connected cylinder (14) through bolt (18) with double-screw bolt (19).
2. one section extraction check valve according to claim 1 is characterized in that: said valve sealing face (17) angle of inclination is 10 °-20 °.
3. one section extraction check valve according to claim 1 is characterized in that: said valve material adopts high-temperature alloy steel, valve sealing face (17) pile-up welding hard alloy.
4. one section extraction check valve according to claim 1 is characterized in that: the inner chamber of said valve body (1) adopts airflow design.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102918729A CN102808976A (en) | 2012-08-16 | 2012-08-16 | One-section extraction check valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102918729A CN102808976A (en) | 2012-08-16 | 2012-08-16 | One-section extraction check valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102808976A true CN102808976A (en) | 2012-12-05 |
Family
ID=47232779
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012102918729A Pending CN102808976A (en) | 2012-08-16 | 2012-08-16 | One-section extraction check valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102808976A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103267150A (en) * | 2013-05-14 | 2013-08-28 | 哈电集团哈尔滨电站阀门有限公司 | Novel steam-pumping check valve |
| 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 |
| CN108561598A (en) * | 2018-02-09 | 2018-09-21 | 北京宇航系统工程研究所 | A kind of high pressure check valve |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4188973A (en) * | 1977-12-06 | 1980-02-19 | Anderson, Greenwood & Co. | Check valve |
| CN2104361U (en) * | 1991-05-13 | 1992-05-13 | 山东龙口发电厂 | Hydraulically steam-pumping check valve |
| US5261449A (en) * | 1992-05-15 | 1993-11-16 | Val-Matic Valve And Manufacturing Corp. | Quick change coupling for tilted disc check valve with top mounted dashpot |
| CN2436740Y (en) * | 2000-08-08 | 2001-06-27 | 黄作兴 | Check valve for vapour pumping |
| CN2612850Y (en) * | 2003-05-13 | 2004-04-21 | 吴光忠 | Quick-acting shutdown 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 |
| CN200975529Y (en) * | 2006-10-08 | 2007-11-14 | 兰州高压阀门有限公司 | Hydraulic steam extraction type back valve |
| CN201416674Y (en) * | 2009-06-03 | 2010-03-03 | 环球阀门集团有限公司 | Steam bleeding check valve |
| CN201513610U (en) * | 2009-09-18 | 2010-06-23 | 鞍钢集团矿业公司 | Novel check valve |
| CN201963963U (en) * | 2010-12-13 | 2011-09-07 | 南方阀门制造有限公司 | Extraction check valve |
-
2012
- 2012-08-16 CN CN2012102918729A patent/CN102808976A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4188973A (en) * | 1977-12-06 | 1980-02-19 | Anderson, Greenwood & Co. | Check valve |
| CN2104361U (en) * | 1991-05-13 | 1992-05-13 | 山东龙口发电厂 | Hydraulically steam-pumping check valve |
| US5261449A (en) * | 1992-05-15 | 1993-11-16 | Val-Matic Valve And Manufacturing Corp. | Quick change coupling for tilted disc check valve with top mounted dashpot |
| CN2436740Y (en) * | 2000-08-08 | 2001-06-27 | 黄作兴 | Check valve for vapour pumping |
| CN2612850Y (en) * | 2003-05-13 | 2004-04-21 | 吴光忠 | Quick-acting shutdown 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 |
| CN200975529Y (en) * | 2006-10-08 | 2007-11-14 | 兰州高压阀门有限公司 | Hydraulic steam extraction type back valve |
| CN201416674Y (en) * | 2009-06-03 | 2010-03-03 | 环球阀门集团有限公司 | Steam bleeding check valve |
| CN201513610U (en) * | 2009-09-18 | 2010-06-23 | 鞍钢集团矿业公司 | Novel check valve |
| CN201963963U (en) * | 2010-12-13 | 2011-09-07 | 南方阀门制造有限公司 | Extraction check valve |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103267150A (en) * | 2013-05-14 | 2013-08-28 | 哈电集团哈尔滨电站阀门有限公司 | Novel steam-pumping check valve |
| 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 |
| CN108561598A (en) * | 2018-02-09 | 2018-09-21 | 北京宇航系统工程研究所 | A kind of high pressure check valve |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20121205 |