CN2104361U - Hydraulically steam-pumping check valve - Google Patents
Hydraulically steam-pumping check valve Download PDFInfo
- Publication number
- CN2104361U CN2104361U CN 91211666 CN91211666U CN2104361U CN 2104361 U CN2104361 U CN 2104361U CN 91211666 CN91211666 CN 91211666 CN 91211666 U CN91211666 U CN 91211666U CN 2104361 U CN2104361 U CN 2104361U
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- China
- Prior art keywords
- piston
- check valve
- steam
- transmission shaft
- hydraulically
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Abstract
The utility model discloses a hydraulically steam-pumping check valve, mainly characterized in that the compression spring (8), the piston (7), the piston rod (6), and the lever (5) of operating devices are positioned on the same side of a driving shaft (10). The hydraulically steam-pumping check valve is arranged below the inner piston (7) of a piston barrel (9) as well. Thus, the utility model has the advantages that the structure of the valve is more reasonable and compact; the stress condition of the driving shaft is improved; the clamping of the driving shaft is avoided; starting and stopping are more flexible; safety in operation is high. The hydraulically steam-pumping check valve is widely used for an extraction line whose diameter is greater than 300 millimeters in steam turbines for heat-engine plants.
Description
The utility model relates to a kind of improved check valve, more particularly, be a kind of be used for the steam turbine of thermal power plant extraction line supporting pounce on the plate type hydraulic extraction check valve.
At present, homemade extracted steam from turbine pipeline is extensively supporting pounces on the plate type hydraulic check valve, its Effector unreasonable structure, and piston and extension spring place the both sides of transmission shaft by lever.Like this, piston is in folding process, extension spring by piston rod and opposite side produces very big pressure gradually to transmission shaft, be subjected to the transmission shaft of big pressure, in rotary course, produce local contact between same axle sleeve, the differential, cut occurs, cause the transmission shaft bite because of pressure greatly causes transmission shaft and axle sleeve and differential contact position, influence valve disc and freely opened or close, thereby influenced the safe operation of steam turbine.
The purpose of this utility model, a kind of improved plate type hydraulic extraction check valve of pouncing on will be provided exactly, the same side that it places transmission shaft with pressure spring and the piston and the lever etc. of Effector, improved the stress condition of transmission shaft, make structure more reasonable, compact, open and close flexibly, reliably, can prevent effectively that the steam refluence enters in the steam turbine in the steam turbine of thermal power plant extraction line.
Task of the present utility model is finished as follows: on the former architecture basics of pouncing on the plate type hydraulic extraction check valve, the same side that pressure spring and piston, piston rod, the lever of Effector is installed in transmission shaft, pressure spring is installed in the following for best of piston cylinder inner carrier, make like this that the transmission shaft of former check valve is stressed to become the situation as Fig. 8 by Fig. 7, thereby improved the transmission shaft working condition greatly, avoided occurring bite.When particularly pressure spring being installed in piston cylinder inner carrier following, make more compact structure.
Below with reference to drawings and Examples the utility model is described in detail.
Fig. 1 is a cut-away view of the present utility model.
Fig. 2 is a kind of cut-away view of external form of the present utility model and Effector.
Fig. 3 is the A-A sectional view of Fig. 1.
Fig. 4 is the former cut-away view of pouncing on the plate type hydraulic extraction check valve.
Fig. 5 is the former external form of plate type hydraulic extraction check valve and a kind of cut-away view of Effector pounced on.
Fig. 6 is the A-A sectional view of Fig. 5.
Fig. 7 is the former plate type hydraulic extraction check valve transmission shaft free-body diagram of pouncing on.
Fig. 8 is a transmission shaft free-body diagram of the present utility model.
Fig. 9 is the another kind of free-body diagram of transmission shaft of the present utility model.
Embodiment 1: with reference to Fig. 1, Fig. 2, Fig. 3, pounce on the plate type hydraulic extraction check valve after describe in detail improving, its Effector and annex by former valve gap (1), valve disc pull bar (2), valve disc (3), valve body (4), after improving is formed.The piston cylinder of Effector (9) is with removable being connected and fixed in the side of valve body (4) such as screws, former extension spring (8) is designed to pressure spring (8), it is installed in the bottom of the piston (7) of the piston cylinder (9) that is positioned at transmission shaft (10) homonymy.Piston (7) tightens together with piston rod (6), and piston rod (6) is connected with lever (5), and the outer end of the same transmission shaft of lever (5) (10) tightens together, and pressure rod (13) is fastened on the transmission shaft (10).Under normal operation, the working water pressure that enters piston (7) top from working water import (11) is very low, because the power that pressure spring (8) acts on the piston (7) acts on power on the piston (7) greater than working water, piston (7) is positioned at the topmost part position of piston cylinder (9).Pressure spring power makes lever (5) left end reach the extreme higher position to the effect of piston (7) simultaneously, and transmission shaft (10) transmission makes pressure rod (13) be in the extreme higher position, and at this moment, valve disc (3) can freely be opened under the effect of drawing gas.When having an accident, the working water pressure that is come by special electromagnetic valve increases suddenly, the power that working water acts on the piston (7) acts on power on the piston greater than pressure spring (8), then piston (7) moves down rapidly, make pressure spring (8) compression, drive pressure rod (13) by lever (5) and transmission shaft (10) and rotate in the counterclockwise direction, pressure rod (13) is pressed on the pin (12) of valve disc (3), forces valve disc (3) quick closedown.When the working water pressure on piston (7) top drops to a certain degree, because of the effect of pressure spring (8) returns on the normal position.Because the spring (8) of Effector and piston (7), piston rod (6) and lever (5) are positioned at the same side of transmission shaft (10), the water active force on the piston and the reaction force of pressure spring are cancelled out each other, so eliminated the very big pressure that piston is produced transmission shaft (10) in folding process, avoided transmission shaft (10) the part contact of differential (14) and axle sleeve (15) to be caused the bite of transmission shaft, greatly improved the operating conditions of transmission shaft, make the utility model compact structure, rationally, open and close flexibly, transmission shaft does not have bite, improved the reliability of work, the safe operation of steam turbine of thermal power plant has been had a positive effect.
The utility model can be widely used in the steam turbine of thermal power plant diameter greater than in 300 millimeters the various extraction lines.
Embodiment 2: change embodiment 1 pressure spring into extension spring (8), be installed in transmission shaft (10) homonymy lever (5), the top of piston rod (6), one end is fixed on the lever (5), the other end is fixed on the valve body support, all the other structures are with embodiment 1, stressing conditions such as Fig. 9, but overall structure not with embodiment's 1 compactness.
Claims (2)
1, a kind of plate type hydraulic extraction check valve of pouncing on, form by valve gap (1), valve disc pull bar (2), valve disc (3), valve body (4), Effector and annex, it is characterized in that the pressure spring (8) of Effector and the same side that piston (7), piston rod (6), lever (5) are positioned at transmission shaft (10).
2, by the described plate type hydraulic extraction check valve of pouncing on of claim 1, the pressure spring (8) that it is characterized in that Effector be installed in piston cylinder (9) inner carrier (7) below.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91211666 CN2104361U (en) | 1991-05-13 | 1991-05-13 | Hydraulically steam-pumping check valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91211666 CN2104361U (en) | 1991-05-13 | 1991-05-13 | Hydraulically steam-pumping check valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2104361U true CN2104361U (en) | 1992-05-13 |
Family
ID=4920318
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 91211666 Pending CN2104361U (en) | 1991-05-13 | 1991-05-13 | Hydraulically steam-pumping check valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2104361U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003069129A1 (en) * | 2002-02-11 | 2003-08-21 | Xin Wang | Double-action bleeding valve of steam turbine |
| CN102808977A (en) * | 2012-08-17 | 2012-12-05 | 大连大高阀门股份有限公司 | High exhaust check valve of critical and supercritical thermal power generating set 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 |
| CN104533542A (en) * | 2014-12-23 | 2015-04-22 | 青岛捷能汽轮机集团股份有限公司 | Geothermal steam turbine and main steam valve thereof |
| EP3324415A4 (en) * | 2015-07-13 | 2019-03-13 | Tsinghua University | Baffle structure for channel |
-
1991
- 1991-05-13 CN CN 91211666 patent/CN2104361U/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003069129A1 (en) * | 2002-02-11 | 2003-08-21 | Xin Wang | Double-action bleeding valve of steam turbine |
| 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 |
| CN102808977A (en) * | 2012-08-17 | 2012-12-05 | 大连大高阀门股份有限公司 | High exhaust check valve of critical and supercritical thermal power generating set valve |
| CN102808977B (en) * | 2012-08-17 | 2014-03-19 | 大连大高阀门股份有限公司 | High exhaust check valve of critical and supercritical thermal power generating set valve |
| CN104533542A (en) * | 2014-12-23 | 2015-04-22 | 青岛捷能汽轮机集团股份有限公司 | Geothermal steam turbine and main steam valve thereof |
| CN104533542B (en) * | 2014-12-23 | 2016-06-29 | 青岛捷能汽轮机集团股份有限公司 | A kind of geothermal steam turbine and main inlet throttle-stop valve thereof |
| EP3324415A4 (en) * | 2015-07-13 | 2019-03-13 | Tsinghua University | Baffle structure for channel |
| US10943704B2 (en) | 2015-07-13 | 2021-03-09 | Tsinghua University | Baffle structure for channel |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| AD01 | Patent right deemed abandoned | ||
| C20 | Patent right or utility model deemed to be abandoned or is abandoned |