CN102808977B - High exhaust check valve of critical and supercritical thermal power generating set valve - Google Patents
High exhaust check valve of critical and supercritical thermal power generating set valve Download PDFInfo
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- CN102808977B CN102808977B CN201210292893.2A CN201210292893A CN102808977B CN 102808977 B CN102808977 B CN 102808977B CN 201210292893 A CN201210292893 A CN 201210292893A CN 102808977 B CN102808977 B CN 102808977B
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Abstract
The invention relates to the field of thermal power valves for critical and supercritical thermal power generating set systems, particularly to a high exhaust check valve of a critical and supercritical thermal power generating set valve, which is characterized in that the left shaft sleeve key of a forced-opening shaft is mounted in the left side shaft pin hole of a valve body and connected with a rocker arm assembly; a forced-opening shaft and a right shaft sleeve are inserted into the right side of the shaft pin hole of the valve body; a right filler press plate stud is screwed into a right bracket; a right filler press plate, a filler, a press sleeve right filler press plate stud, a guide sleeve, a bearing, a bearing gland, an oil cup and a spiral wound gasket are all embedded into the forced-opening shaft, and are matched tightly with the valve body; a filler, a filler press sleeve, a left bracket, a bearing, a bearing gland and a guide sleeve on the left side forced-opening shaft are assembled to be inserted into the forced-opening shaft together with a switch press plate; a forced-opening transmission handle and a forced-closing transmission handle are mounted on the two sides of the forced-opening shaft and then in the cylinder, and a cylinder rear cover and a force-opening cylinder rear cover O ring are mounted; and after the cylinder is assembled, a forced-opening cylinder and a forced-closing cylinder are mounted respectively. The high exhaust check valve can automatically open, and the forced-closing cylinder can automatically and quickly close the valve within 0.5 seconds in case of emergency.
Description
Technical field
The present invention relates to thermoelectricity valve field critical, that supercritical thermal power generator set system is used, specifically relate to that an a kind of m. gigawatt (GW) is critical, the high row of supercritical thermal power unit valve check valve.
Background technique
The high row of critical, overcritical coal fired power generation unit related valve check valve; it is the additional actuator of Swing check valve; this valve is arranged between high-pressure cylinder and reheater on pipeline, prevents that air-flow is unstable and causes that reheater medium flows backwards into high-pressure cylinder, plays the protective action of key equipment.In prior art, such valve does not have actuator outward, can not automatically open, and the shut-in time does not guarantee.Meet urgency and can not be less than rapid automatic-closing valve in 0.5 second.Valve closing can prevent that the reheater medium causing because air-flow is unstable from flowing backwards into high-pressure cylinder, plays the protective action to key equipment.
Summary of the invention
The problem existing in order to solve above-mentioned prior art, the invention provides high row's check valve, can automatically open, and chance urgency is closed by force cylinder can be less than rapid automatic-closing valve in 0.5 second.
The technical solution adopted for the present invention to solve the technical problems is:
(1) rocking arm, flap, cotter pin, flap nut, flap nut collar, stop pin are assembled into assembly and are placed in valve body, and valve seat is welded on valve body;
(2) open by force axle left axle sleeve key and be installed in valve body left-hand axis pin-and-hole (seeing Fig. 2), be connected with rocker arm assembly.On valve body pivot hole right side, insert strong off-axis, right axle sleeve;
(3) the in-built filler of valve body both sides pivot hole, valve body both sides are screwed into right support double-screw bolt, left socle double-screw bolt.On right support, screw in right hold-down grid double-screw bolt, fill right hold-down grid, filler, the right hold-down grid nut of gland, guide sleeve, bearing, bearing gland, lubricating cup, spirotallic gasket and be together inserted in strong off-axis, join tightly with valve body, put right support check washer, tighten right support nut;
(4) left side is opened by force axle place and is pressed into filler, filler pressing sleeve, is screwed into pressing plate double-screw bolt, puts into left hold-down grid, the panel nut of screwing on.After left socle, bearing, bearing gland, guide sleeve assembling and switch press plate insert simultaneously and open by force axle, add left socle check washer, tighten left socle nut; Both sides are installed and to be opened by force transmission handle, close transmission handle, locking nut and left socle plain washer by force; Screw on and mark closely screw.Install slotted pan head screw, lower slotted pan head screw, interior switch fixing casing, external switch fixed plate, position limit switch;
(5) install and to open by force cylinder, close cylinder (seeing Fig. 4,5) by force, open by force spring cylinder, close spring cylinder by force and be bumped into and open by force cylinder piston rod O shape circle, open cylinder bonnet O shape circle by force, cylinder block is installed.Open by force piston rod, close piston rod by force and be bumped into and open by force piston rod O shape circle, install respectively and open by force piston, close piston by force, be bumped into and open by force piston O shape circle, tighten buffering nut, be inserted in respectively and open by force spring, install in cylinder block after closing spring by force, then cylinder back cover is installed, is opened cylinder bonnet O shape circle by force, tighten and open by force cylinder nut, open cylinder double-screw bolt, spring washer by force;
(6) after cylinder combination, valve body both sides are installed respectively, with strong pass cylinder supports plate, the hexagon socket cap head screw of opening by force cylinder supports plate, fix, install respectively and open by force cylinder, close these two cylinders of cylinder and connect pneumatic element vacuum filter, solenoid valve, rapid escape valve, manual pet valve (see figure 6) by force;
(7) piston rod locking nut, round nut adjusted position are installed: R side with open by force transmission handle and contact, in L side, contact with the strong transmission handle that closes, flange stud during valve body screws in, installs spirotallic gasket, valve gap, add middle flange check washer and middle flange plain washer, tighten middle flange nut.
The beneficial effect that the present invention has is:
1. valve body adopts shape casting, uniform wall thickness, and in use the anti-stress performance of valve is good, lightweight, and pipeline load is little;
2. pivot pin, by opening axle by force and strong off-axis forms, is opened by force between axle and rocking arm and is connected with key, between strong off-axis and rocking arm, adopts idle stroke clutch to be connected, and final controlling element only works quick closedown and the valve opening effect of assisting;
3. valve has and opens by force function, when flow is less than regulation flow, allows and opens by force cylinder action, and the rotation of the up promotion transmission of piston rod handle, drives and open by force axle and rotate and make flap unlatching.This just prevents in initial start stage because the unstable of air-flow causes that flap vibration damages sealing surface;
4. there is servo-actuated closing with positive closing two and overlap independently protective system.When opening by force cylinder, close, close by force cylinder while opening, flap is in free state, and gas flow determines valve opening and closing.Now this valve is equivalent to general Swing check valve, and flap is opened with medium following current, and adverse current is closed.When receiving shutdown signal, make to close by force cylinder pressurized air through the rapid exhaust of fast-discharge valve, Compress Spring power abrupt release simultaneously, can force valve to be closed rapidly, and the shut-in time is less than 0.5 second;
5. Pneumatic actuator adopts two cylinder movement structures, utilizes the Compress Spring accumulation of energy simultaneously of cavity of resorption air inlet piston stroking upward, and a cylinder auxiliary valve is opened, and another cylinder auxiliary valve is closed;
6. drive by force three position limit switches of position, axle place installation, can understand at any time open and close position and the neutral position of valve.
In view of the high row of the present invention check valve, have and can automatically open, chance urgency is closed by force cylinder can carry out extensive use in the advantage that is less than rapid automatic-closing valve in 0.5 second, is a kind of new technology with promotional value.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
Fig. 1 is high row's check valve structural representation;
Fig. 2 is high row's check valve pivot pin part scheme of installation;
Fig. 3 is Pneumatic actuator structural representation;
Fig. 4 is the strong cylinder schematic diagram that closes in Pneumatic actuator;
Fig. 5 opens by force cylinder schematic diagram in Pneumatic actuator;
Fig. 6 opens by force cylinder, closes cylinder pneumatic principle schematic diagram by force;
When Fig. 7 is valve open, open by force cylinder, close cylinder adjusted position schematic diagram by force;
Fig. 8 is that valve closing is opened by force cylinder while opening, closed cylinder adjusted position schematic diagram by force;
Reference character shown in Fig. 1～Fig. 8 is as follows: 1, valve body, 2, valve seat, 3, flap, 4, rocking arm, 5, flap nut collar, 6, flap nut, 7, cotter pin, 8, stop pin, 9, spirotallic gasket, 10, valve gap, 11, middle flange plain washer, 12, middle flange check washer, 13, middle flange nut, 14, middle flange stud, 15, lifting bolt, 16, open by force cylinder, 17, strong cylinder, 18 of closing, open by force transmission handle, 19, guide sleeve, 20, bearing gland, 21, bearing, 22, open by force axle, 23, left axle sleeve, 24, key, 25, strong off-axis, 26, right support check washer, 27, right support nut, 28, right support double-screw bolt, 29, filler, 30, left hold-down grid, 31, right hold-down grid, 32, lubricating cup, 33, locking nut, 34, strong transmission handle, 35 of closing, right support, 36, right hold-down grid double-screw bolt, 37, right hold-down grid nut, 38, spirotallic gasket, 39, right axle sleeve, 40, left socle plain washer, 41, left socle, 42, pressing plate double-screw bolt, 43, panel nut, 44, filler pressing sleeve, 45, left socle check washer, 46, left socle double-screw bolt, 47, left socle nut, 48, open by force piston, 49, open by force cylinder double-screw bolt, 50, open by force cylinder nut, 51, open by force spring cylinder, 52, open by force cylinder piston rod O shape circle, 53, open by force piston rod, 54, cylinder back cover, 55, open by force cylinder bonnet O shape circle, 56 cylinder block, 57, open by force piston O shape circle, 58, buffering nut, 59, open by force piston rod O shape circle, 60, open by force spring, 61, spring washer, 62, hexagon socket cap head screw, 63, strong cylinder supports plate, 64 of closing, piston rod locking nut, 65, round nut, 66, position limit switch, 67, mark closely screw, 68, interior switch fixing casing, 69, upper slotted pan head screw, 70, switch press plate, 71, external switch fixed plate, 72, open by force cylinder supports plate, 73, strong piston rod, 74 of closing, strong spring cylinder, 75 of closing, strong piston, 76 of closing, strong spring, 77 of closing, lower slotted pan head screw, 78, vacuum filter, 79, solenoid valve, 80, rapid escape valve, 81, manual pet valve.
Embodiment
In conjunction with Fig. 1～Fig. 8, the high row of the present invention check valve structure is further described:
(1) Rocker arm 4, flap 3, cotter pin 7, flap nut 6, flap nut collar 5, stop pin 8 are assembled into assembly and are placed in valve body 1, and valve seat 2 is welded on valve body 1;
(2) open by force axle 22 left axle sleeve 23 keys 24 and be installed in valve body 1 left-hand axis pin-and-hole (seeing Fig. 2), be connected with Rocker arm 4 assembly.On valve body 1 pivot hole right side, insert strong off-axis 25, right axle sleeve 39;
(3) the in-built filler 29 of valve body 1 both sides pivot hole, valve body 1 both sides are screwed into right support double-screw bolt 28, left socle double-screw bolt 46.On right support 35, screw in right hold-down grid double-screw bolt 36, fill right hold-down grid 31, filler 29, the right hold-down grid nut 37 of gland, guide sleeve 19, bearing 21, bearing gland 20, lubricating cup 32, spirotallic gasket 38 and be together inserted in strong off-axis 25, join tightly with valve body 1, put right support check washer 26, tighten right support nut 27;
(4) left side is opened by force axle 22 places and is pressed into filler 29, filler pressing sleeve 44, is screwed into pressing plate double-screw bolt 42, puts into left hold-down grid 30, the panel nut 43 of screwing on.Left socle 41, bearing 21, bearing gland 20, guide sleeve 19 assemble afterwards and switch press plate 70 inserts and opens by force axle 22 simultaneously, add left socle check washer 45, tighten left socle nut 47; Both sides are installed and to be opened by force transmission handle 18, close transmission handle 34, locking nut 33 and left socle plain washer 40 by force; Screw on and mark closely screw 67.Install slotted pan head screw 69, lower slotted pan head screw 77, interior switch fixing casing 68, external switch fixed plate 71, position limit switch 66;
(5) install and to open by force cylinder 16, close cylinder 17(by force and see Fig. 4,5), open by force spring cylinder 51, close spring cylinder 74 by force and be bumped into and open by force cylinder piston rod O shape circle 52, open cylinder bonnet O shape circle 55 by force, cylinder block 56 is installed.Open by force piston rod 53, close piston rod 73 by force and be bumped into and open by force piston rod O shape circle 59, install respectively and open by force piston 48, close piston 75 by force, be bumped into and open by force piston O shape circle 57, tighten buffering nut 58, be inserted in respectively and open by force spring 60, close in the rear installation cylinder block 56 of spring 76 by force, then cylinder back cover 54 is installed, is opened cylinder bonnet O shape circle 55 by force, tighten and open by force cylinder nut 50, open cylinder double-screw bolt 49, spring washer 61 by force;
(6) after cylinder combination, valve body 1 both sides are installed respectively, with strong pass cylinder supports plate 63, open by force cylinder supports plate 72 hexagon socket cap head screw 62 fixing, install respectively open by force cylinder 16, by force close cylinder 17 these two cylinders and connect pneumatic element vacuum filter 78, solenoid valve 79, rapid escape valve 80, manually pet valve 81(is shown in Fig. 6);
(7) piston rod locking nut 64, round nut 65 adjusted position are installed: R side with open by force transmission handle 18 and contact, in L side, contact with the strong transmission handle 34 that closes, flange stud 14 during valve body 1 screws in, spirotallic gasket 9, valve gap 10 are installed, add middle flange check washer 12 and middle flange plain washer 11, tighten middle flange nut 13.
Claims (1)
1. critical, supercritical thermal power unit valve height is arranged check valve, it is characterized in that:
(1) rocking arm, flap, cotter pin, flap nut, flap nut collar, stop pin are assembled into assembly and are placed in valve body, and valve seat is welded on valve body;
(2) open by force axle left axle sleeve key and be installed in valve body left-hand axis pin-and-hole, be connected with rocker arm assembly, on valve body pivot hole right side, insert strong off-axis, right axle sleeve;
(3) the in-built filler of valve body both sides pivot hole, valve body both sides are screwed into right support double-screw bolt, left socle double-screw bolt, on right support, screw in right hold-down grid double-screw bolt, fill right hold-down grid, filler, the right hold-down grid nut of gland, guide sleeve, bearing, bearing gland, lubricating cup, spirotallic gasket and be together inserted in strong off-axis, join tightly with valve body, put right support check washer, tighten right support nut;
(4) left side is opened by force axle place and is pressed into filler, filler pressing sleeve, is screwed into pressing plate double-screw bolt, puts into left hold-down grid, the panel nut of screwing on, after left socle, bearing, bearing gland, guide sleeve assembling and switch press plate insert simultaneously and open by force axle, add left socle check washer, tighten left socle nut; Both sides are installed and to be opened by force transmission handle, close transmission handle, locking nut and left socle plain washer by force; Screw on and mark closely screw; Install slotted pan head screw, lower slotted pan head screw, interior switch fixing casing, external switch fixed plate, position limit switch;
(5) install and open by force cylinder, the strong cylinder that closes, open by force spring cylinder, strong pass spring cylinder is bumped into and opens by force cylinder piston rod O shape circle, open by force cylinder bonnet O shape circle, cylinder block is installed, open by force piston rod, strong pass piston rod is bumped into and opens by force piston rod O shape circle, install and open by force piston respectively, the strong piston that closes, be bumped into and open by force piston O shape circle, tighten buffering nut, be inserted in respectively and open by force spring, after the spring of strong pass, install in cylinder block, then cylinder back cover is installed, open by force cylinder bonnet O shape circle, tighten and open by force cylinder nut, open by force cylinder double-screw bolt, spring washer, strong pass cylinder back cover and cylinder body pass through nut, bolt is tightened,
(6) after cylinder combination, valve body both sides are installed respectively, with strong pass cylinder supports plate, the hexagon socket cap head screw of opening by force cylinder supports plate, fix, install respectively and open by force cylinder, close these two cylinders of cylinder and connect pneumatic element vacuum filter, solenoid valve, rapid escape valve, manual pet valve by force;
(7) piston rod locking nut, round nut adjusted position are installed: R side with open by force transmission handle and contact, in L side, contact with the strong transmission handle that closes, flange stud during valve body screws in, installs spirotallic gasket, valve gap, add middle flange check washer and middle flange plain washer, tighten middle flange nut.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210292893.2A CN102808977B (en) | 2012-08-17 | 2012-08-17 | High exhaust check valve of critical and supercritical thermal power generating set valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210292893.2A CN102808977B (en) | 2012-08-17 | 2012-08-17 | High exhaust check valve of critical and supercritical thermal power generating set valve |
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| Publication Number | Publication Date |
|---|---|
| CN102808977A CN102808977A (en) | 2012-12-05 |
| CN102808977B true CN102808977B (en) | 2014-03-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210292893.2A Active CN102808977B (en) | 2012-08-17 | 2012-08-17 | High exhaust check valve of critical and supercritical thermal power generating set valve |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103438250A (en) * | 2013-05-03 | 2013-12-11 | 无锡富盛阀业有限公司 | Swing check valve |
| CN104089055A (en) * | 2014-07-02 | 2014-10-08 | 南通国电电站阀门有限公司 | Supercritical large-caliber two-direction buffer control type check valve |
| CN105042123A (en) * | 2015-07-03 | 2015-11-11 | 南通国电电站阀门有限公司 | Supercritical Y-shaped internally-hung hard self-sealing flap-turning check valve |
| CN115163868B (en) * | 2022-09-07 | 2022-12-02 | 烟台海悦能源科技有限公司 | Intelligent balance valve of remote control |
Citations (8)
| 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 |
| CN200955611Y (en) * | 2006-10-08 | 2007-10-03 | 兰州高压阀门有限公司 | Pneumatic air-extraction non-return 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
- 2012-08-17 CN CN201210292893.2A patent/CN102808977B/en active Active
Patent Citations (8)
| 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 |
| CN200955611Y (en) * | 2006-10-08 | 2007-10-03 | 兰州高压阀门有限公司 | Pneumatic air-extraction non-return 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 |
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| CN102808977A (en) | 2012-12-05 |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: High discharge check valve for critical and supercritical thermal power unit valves Effective date of registration: 20230927 Granted publication date: 20140319 Pledgee: Dalian Branch of Shanghai Pudong Development Bank Co.,Ltd. Pledgor: DALIAN DV VALVE Co.,Ltd. Registration number: Y2023980059639 |
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