CN102606748A - Nuclear class II film pneumatic bellows stop valve - Google Patents
Nuclear class II film pneumatic bellows stop valve Download PDFInfo
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- CN102606748A CN102606748A CN2010106113363A CN201010611336A CN102606748A CN 102606748 A CN102606748 A CN 102606748A CN 2010106113363 A CN2010106113363 A CN 2010106113363A CN 201010611336 A CN201010611336 A CN 201010611336A CN 102606748 A CN102606748 A CN 102606748A
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Abstract
A nuclear class II film pneumatic bellows stop valve belongs to the field of nuclear power valves used by large pressurized water reactor nuclear power station systems. Surfacing of hard alloy on both a valve seat and a valve clack enables sealing surfaces to be high in hardness, so that the valve is more wear-resistant and scour-resistant and is extremely resistant to corrosion. A Brinell hardness difference of 50 exists between the two sealing surfaces, so that excellent sealing property can be further guaranteed. A pneumatic device of a diaphragm structure is short in stroke, compact and flexible in structure, and a hand-operating mechanism can be mounted on the pneumatic device if needed. The pneumatic bellows stop valve is simple in structure, convenient in maintenance, short in opening and closing time by means of short operating stroke, and small in closing friction force, scour-resistant and reliable in sealing by means of conical surface sealing between the sealing surfaces of the valve clack and the valve seat.
Description
Technical field
The present invention relates to the nuclear power valve field that the large pressurized water reactor nuclear power plant system is used, relate to examine secondary film pneumatic bellows stop valve concretely.
Background technique
Nuclear secondary film pneumatic bellows stop valve is used for the pneumatic bellows stop valve that gigawatt and large pressurized water reactor nuclear power plant reactor coolant system, safety injection system, waste heat guiding system, main steam system, change appearance system, nuclear power three wastes system use.The bellows stop valve that generally uses at present generally is made up of valve body, spool, valve rod, valve gap, bellows, drive spool by moving up and down of valve rod and come opening of control valve and pass or aperture, but medium can leak into the valve body outside through stuffing box packing along valve rod when opening state; Cause valve to produce to run, emit, weeping; More outstanding when the high pressure operating mode is used especially, and the Pneumatic actuator of such valve part is bigger, and be connected with valve with 4 double-screw bolts; Boundary dimension is big; Weight is big, and poor rigidity is met urgency automatic-closing valve rapidly.
Summary of the invention
In view of the defective that existing procucts exist, the present invention will provide a kind of size little in light weight, when losing gas/dead electricity, and the nuclear secondary film pneumatic bellows stop valve of self acting stop valve rapidly in 5 seconds.
For realizing above-mentioned purpose; The technical solution that the present invention adopted is a nuclear secondary film pneumatic bellows stop valve; It comprises: valve body, flap, valve rod, bellows, valve gap and Pneumatic actuator, between valve body and the valve gap with in flange double-screw bolt, middle flange nut, check washer be connected an end of two spirotallic gaskets of folder and bellows in valve body and the valve gap; The centre is installed with valve rod and bellows, and the other end of bellows is connected with valve rod; It is characterized in that: also comprise stuffing seal; Between valve gap and the valve rod filler is installed, realizes the sealing of filler with hold-down grid, pressing plate double-screw bolt, panel nut; The pointer pressing plate sends electrical signal with two limit switches that contact up and down on the Pneumatic actuator that move of valve rod; Pneumatic actuator adopts single-acting diaphragm type cylinder; Utilize the cavity of resorption air inlet to open; The reaction of butterfly spring is closed and can be realized the distant control valve, and valve is closed in the limit switch that the switching position is provided with valve opening or closed position, 5 seconds rapid-closure dampers when losing gas/electricity; Said cylinder medium adopts pressurized air.
Said pneumatic bellows stop valve valve body adopts forging structure.
The equal pile-up welding hard alloy of said valve seat and flap, the hardness of sealing surface of seat are HRC39 ~ 43, and the hardness of the sealing surface of flap is HRC43 ~ 47.
Be connected the form that adopts the flap gland between said flap and the valve rod, the middle locating stud that embeds prevents the rotation between the relative valve rod of flap.
Of the present invention a bit and effect following:
1, the equal pile-up welding hard alloy of valve seat and flap; The hardness of sealing surface of seat is HRC39 ~ 43, and the hardness of the sealing surface of flap is HRC43 ~ 47, and sealing surface all has higher hardness like this; Make its more wear-resisting, anti-washing away; There is the difference of hardness of Bu Shi 50 degree in very corrosion-resistant simultaneously between two sealing surfaces, so just further guarantee excellent sealing performance.
2, Pneumatic actuator adopts diaphragm type structure, and stroke is short, and compact structure, flexible can be installed man-operated mechanism like needs.
3, the pneumatic bellows stop valve structure is simple, easy to maintenance; Working stroke is little, and the open and close time is short; Flap and sealing surface of seat adopt conical surface seal, and it is little to close frictional force, anti-washing away, and sealing is reliable.
Description of drawings
Fig. 1 is a nuclear secondary film pneumatic bellows stop valve structure schematic representation;
Fig. 2 is nuclear secondary film pneumatic bellows stop valve ripple bellows and the general scheme of installation of body;
Fig. 3 is the Pneumatic actuator structural representation.
Among the figure: 1, valve body, 2, flap, 3, locating stud, 4, the flap gland, 5, valve rod, 6, bellows, 7, spirotallic gasket; 8, valve gap, 9, middle flange double-screw bolt, 10, middle flange nut, 11, check washer, 12, filler, 13, double-screw bolt, 14, nut; 15, check washer, 16, the filler gland, 17, hold-down grid, 18, the pressing plate double-screw bolt, 19, panel nut, 20, locking nut; 21, limit switch, 22, Pneumatic actuator, 23, half nuts, 24, screw, 25, the pointer pressing plate, 26, rivet; 27, nameplate diaphragm, 28, diaphragm, 29, the work air chamber, 30, upper shell, 31, manual axle, 32, push rod; 33, dish spring, 34, support, 35, lower shell body, 36, vacuum filter, 37, solenoid valve, 38, pipeline.
Embodiment
In the schematic representation of Fig. 1, Fig. 2 and nuclear secondary film pneumatic bellows stop valve shown in Figure 3; One end of valve body 1 and valve gap 8 interior folder two spirotallic gaskets 7 and bellows 6; The centre is installed with valve rod 5 and bellows 6; The other end of bellows 6 is connected with valve rod 5, and valve rod 5 ends connect flap 2, locating stud 3, flap gland 4, and valve rod 5 is connected with Pneumatic actuator 22 through half nuts 23, screw 24, locking nut 20; And under the drive of Pneumatic actuator 22 and link half nuts 23, screw 24, locking nut 20, realize that flap 2 and the sealing surface in the valve body 1 close unlatching; Flange double-screw bolt 9 in Pneumatic actuator 22 and valve gap 8 usefulness, middle flange nut 10, check washer 11 are fastening, between valve gap 8 and the valve rod 5 filler 12 are installed, with hold-down grid 17, pressing plate double-screw bolt 18, panel nut 19, compress the sealing of realization filler 12; Pointer pressing plate 25 sends electrical signal with two limit switches 21 that contact up and down on the Pneumatic actuator 22 that move of valve rod 5, can understand the open and close position of valve at any time.Pneumatic triple piece is housed on the Pneumatic actuator 22 can realizes the telecontrol of this valve, Pneumatic actuator 22 is single-acting diaphragm type cylinder, and diaphragm 28 is installed between upper shell 30 and the lower shell body 35; And with bolt tightening seal; Push rod 32 is connected with work air chamber 29, and push rod 32 links to each other with manual axle 31, and dish spring 33 is located at manual axle 31 outsides; Vacuum filter 36 is connected with work air chamber 29 through pipeline 38; Vacuum filter 36 is connected with solenoid valve 37, utilizes the cavity of resorption air inlet to open, and 33 reactions of dish spring are closed and can be realized the distant control valve.
Claims (4)
1. examine secondary film pneumatic bellows stop valve; It comprises: valve body (1), flap (2), valve rod (5), bellows (6), valve gap (8) and Pneumatic actuator (22); Between valve body (1) and the valve gap (8) with in flange double-screw bolt (9), middle flange nut (10), check washer (11) be connected; An end of folder two spirotallic gaskets (7) and bellows (6) in valve body (1) and the valve gap (8); The centre is installed with valve rod (5) and bellows (6), and the other end of bellows (6) is connected with valve rod (5), and valve rod (5) is connected with Pneumatic actuator (22) through half nuts (23), screw (24) and locking nut (20); It is characterized in that: also comprise stuffing seal; Between valve gap (8) and the valve rod (5) filler (12) is installed, realizes the sealing of filler (12) with hold-down grid (17), pressing plate double-screw bolt (18), panel nut (19); Pointer pressing plate (25) sends electrical signal with two limit switches (21) that contact up and down on the Pneumatic actuator (22) that move of valve rod (5); Said Pneumatic actuator (22) adopts single-acting diaphragm type work air chamber (29); Utilize the cavity of resorption air inlet to open; Butterfly spring (33) reaction is closed and can be realized the distant control valve, and valve is closed in the limit switch (21) that the switching position is provided with valve opening or closed position, said work air chamber (29) medium employing pressurized air when losing gas/electricity.
2. nuclear secondary film pneumatic bellows stop valve according to claim 1 is characterized in that: pneumatic bellows (6) stop valve valve body (1) adopts forging structure.
3. nuclear secondary film pneumatic bellows stop valve according to claim 1 is characterized in that: valve seat and flap (2) be pile-up welding hard alloy all.
4. nuclear secondary film pneumatic bellows stop valve according to claim 1; It is characterized in that: be connected the form that adopts the flap gland between flap (2) and the valve rod (5); The middle locating stud (3) that embeds prevents flap (2) rotation between the valve rod (5) relatively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010106113363A CN102606748A (en) | 2010-12-29 | 2010-12-29 | Nuclear class II film pneumatic bellows stop valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010106113363A CN102606748A (en) | 2010-12-29 | 2010-12-29 | Nuclear class II film pneumatic bellows stop valve |
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| Publication Number | Publication Date |
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| CN102606748A true CN102606748A (en) | 2012-07-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2010106113363A Pending CN102606748A (en) | 2010-12-29 | 2010-12-29 | Nuclear class II film pneumatic bellows stop valve |
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| CN (1) | CN102606748A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103674534A (en) * | 2013-12-11 | 2014-03-26 | 沈阳仪表科学研究院有限公司 | Metal-corrugated-pipe high-temperature and high-pressure fatigue life testing device |
| CN105135046A (en) * | 2015-09-29 | 2015-12-09 | 云南大红山管道有限公司 | Up-and-down limiting auxiliary device for valve switch |
| CN107676532A (en) * | 2017-11-21 | 2018-02-09 | 山东沃克控制阀有限公司 | A kind of pneumatic means for automatically controlling fluid output |
| CN110056695A (en) * | 2018-01-18 | 2019-07-26 | 江苏鼎晟阀门有限公司 | Pneumatic chlorine forged steel check valve |
| CN110220027A (en) * | 2019-05-29 | 2019-09-10 | 高邮市特种紧固件厂 | A kind of valve gland nut of the valve with anti-loosening function |
| CN111043334A (en) * | 2018-10-12 | 2020-04-21 | 中核苏阀科技实业股份有限公司 | Nuclear safety first-stage pneumatic stop valve |
| CN111043319A (en) * | 2018-10-12 | 2020-04-21 | 中核苏阀科技实业股份有限公司 | Nuclear safety second-stage pneumatic stop valve |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080017822A1 (en) * | 2006-07-19 | 2008-01-24 | Vat Holding Ag | Vacuum valve |
| CN101457852A (en) * | 2008-12-15 | 2009-06-17 | 朱孝有 | Corrosion preventive and strength sealing intelligent control valve |
| CN201277376Y (en) * | 2008-10-17 | 2009-07-22 | 浙江派沃自控仪表有限公司 | Sanitary steam-isolation pneumatic angle type regulation valve |
| CN201306492Y (en) * | 2008-12-09 | 2009-09-09 | 山东菲特自控阀门制造有限公司 | Pneumatic control valve |
-
2010
- 2010-12-29 CN CN2010106113363A patent/CN102606748A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080017822A1 (en) * | 2006-07-19 | 2008-01-24 | Vat Holding Ag | Vacuum valve |
| CN201277376Y (en) * | 2008-10-17 | 2009-07-22 | 浙江派沃自控仪表有限公司 | Sanitary steam-isolation pneumatic angle type regulation valve |
| CN201306492Y (en) * | 2008-12-09 | 2009-09-09 | 山东菲特自控阀门制造有限公司 | Pneumatic control valve |
| CN101457852A (en) * | 2008-12-15 | 2009-06-17 | 朱孝有 | Corrosion preventive and strength sealing intelligent control valve |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103674534A (en) * | 2013-12-11 | 2014-03-26 | 沈阳仪表科学研究院有限公司 | Metal-corrugated-pipe high-temperature and high-pressure fatigue life testing device |
| CN105135046A (en) * | 2015-09-29 | 2015-12-09 | 云南大红山管道有限公司 | Up-and-down limiting auxiliary device for valve switch |
| CN107676532A (en) * | 2017-11-21 | 2018-02-09 | 山东沃克控制阀有限公司 | A kind of pneumatic means for automatically controlling fluid output |
| CN110056695A (en) * | 2018-01-18 | 2019-07-26 | 江苏鼎晟阀门有限公司 | Pneumatic chlorine forged steel check valve |
| CN111043334A (en) * | 2018-10-12 | 2020-04-21 | 中核苏阀科技实业股份有限公司 | Nuclear safety first-stage pneumatic stop valve |
| CN111043319A (en) * | 2018-10-12 | 2020-04-21 | 中核苏阀科技实业股份有限公司 | Nuclear safety second-stage pneumatic stop valve |
| CN110220027A (en) * | 2019-05-29 | 2019-09-10 | 高邮市特种紧固件厂 | A kind of valve gland nut of the valve with anti-loosening function |
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| CB02 | Change of applicant information |
Address after: Ganjingzi District of Dalian City, Liaoning province 116037 Yaojia Road No. 272 Applicant after: Dalian DV Valve Co., Ltd. Address before: Ganjingzi District of Dalian City, Liaoning province 116037 Yaojia Road No. 272 Applicant before: Dalian DV Valve Co., Ltd. |
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Free format text: CORRECT: APPLICANT; FROM: DALIAN DAGAO VALVE CO., LTD. TO: DALIAN DV VALVE CO., LTD. |
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Application publication date: 20120725 |