CN109723869A - A kind of extraction check valve convenient for on-line maintenance - Google Patents
A kind of extraction check valve convenient for on-line maintenance Download PDFInfo
- Publication number
- CN109723869A CN109723869A CN201811622026.4A CN201811622026A CN109723869A CN 109723869 A CN109723869 A CN 109723869A CN 201811622026 A CN201811622026 A CN 201811622026A CN 109723869 A CN109723869 A CN 109723869A
- Authority
- CN
- China
- Prior art keywords
- rocker arm
- valve
- line maintenance
- check valve
- extraction check
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Abstract
The invention discloses a kind of extraction check valves convenient for on-line maintenance, it includes valve body, set on the intracorporal valve seat of valve, rocker arm, flap and valve deck, the any side of valve body is equipped with pneumatic operator, the pneumatic operator is linked by valve rod and rocker arm, one end part of the rocker arm extends to form step outward, described valve rod one end engaged therewith is equipped with protrusion, the face contact of the protrusion and the non-stepped portions of rocker arm, and it can be slid with respect to the non-stepped portions, the first position and rotate clockwise the second position contradicted with the other side of the step of rocker arm that there is the protrusion side of rotation counterclockwise and the step of rocker arm to contradict, it is directly linked using valve rod with rocker arm, so that axis functions only as the effect of support, eliminate being fixedly connected for axis and rocker arm, when on-bne repair, it can be to rocker arm, the parts such as flap Disassembly maintenance is carried out, realizes the maintenance of all parts in addition to valve body.
Description
Technical field
The present invention relates to valve fields, and in particular to a kind of extraction check valve convenient for on-line maintenance.
Background technique
The medium pipelines such as water, vapour of the extraction check valve for power plant's steam bleeding system or other systems, prevent steam turbine because
Pressure when load in steam turbine reduces suddenly, and steam, which flows backwards to enter in steam turbine, in extraction steam pipe and each heater causes steamer leaf
Piece is smashed, and the serious accident of steam turbine generator is damaged, and prevents heater system pipe leakage, it is ensured that is occurred in feed-water heater
When water level superelevation, after pneumatic device component is connected to back flow of gas signal, steam turbine is separated rapidly, gives steam turbine or steam bleeding system
With maximum protection.
And the rocker arm of existing exhaust check valve is to be fixedly installed with shaft, and the actuators such as pneumatic device are to utilize
Its drive rod or valve rod are linked with shaft, drive rocker arm rotation, and since shaft is fixedly connected with rocker arm, it tears open online
When unloading, rocker arm, flap and shaft cannot be dismantled, and dismounting and change can only be carried out to shaft set, pneumatic device, for internal valve
The structures such as valve, rocker arm, then it is bad to be replaced.
Summary of the invention
In view of the above-mentioned problems, the present invention provides a kind of extraction check valve convenient for on-line maintenance.
To achieve the above object, the present invention provides a kind of extraction check valve convenient for on-line maintenance comprising valve body is set to
The intracorporal valve seat of valve, rocker arm, flap and valve deck, the flap are fixed in valve body by rocker arm, the rocker arm upper end
It is fixed in valve body by axis, the flap and valve seat constitute sealing cooperation, and the valve deck is arranged above valve body, the valve body
Any side is equipped with pneumatic operator, and the pneumatic operator is linked by valve rod and rocker arm, and the one of the rocker arm
End part extends to form step outward, and described valve rod one end engaged therewith is equipped with protrusion, the protrusion and the non-step of rocker arm
The face contact at position, and can be slid with respect to the non-stepped portions, the protrusion has rotation counterclockwise and the one of the step of rocker arm
The first position and rotate clockwise the second position contradicted with the other side of the step of rocker arm that side contradicts.
The valve body both ends are equipped with detachable axle sleeve, and the valve rod passes through any one detachable axle sleeve and mutually fits with rocker arm
Match, axis one end of the rocker arm is limited by detachable axle sleeve, and the other end is then by valve stem spacing.
Any end of the axis is equipped with locating part, and the locating part and detachable axle sleeve constitute the limit to rotate in a circumferential direction.
One end of the valve rod is equipped with protrusion, and the protrusion is circumferentially arranged along valve rod, and the arc length of the protrusion is less than valve
The half of the perimeter of bar.
The rocker arm includes rocking lever and the fixed part with perforation, and the step is circumferentially distributed along fixed part, and institute
The arc length for stating step is the half of fixed part perimeter.
Pneumatic operator is detachably secured to one end of the valve body by fixed frame.
The pneumatic operator includes including cylinder, quick closing valve component and drive rod, and the actuator and valve rod link
Cooperation.
The flap includes discoid basal disc, and the basal disc center is equipped with fixed link, along fixed link center shape outward
At cambered surface, the position that the rocker arm is contacted with cambered surface is inclined-plane.
The fixed link includes the tight lock part that the rounded sleeved part in section and diameter are less than sleeved part maximum gauge.
The rocker arm includes rocking lever, and the rocking lever is equipped with auxiliary section, and the auxiliary section is equipped with and mutually fits with sleeved part
The overlap aperture matched, the inner wall of the set perforation and the tangent setting of sleeved part.
Beneficial effects of the present invention: being directly linked using valve rod with rocker arm, so that axis functions only as the effect of support,
It eliminates being fixedly connected for axis and rocker arm, when on-bne repair, the parts such as rocker arm, flap can be carried out with disassembly maintenance, realized
The maintenance of all parts in addition to valve body.
Detailed description of the invention
Fig. 1 is partial cutaway schematic of the invention.
Fig. 2 is diagrammatic cross-section of the invention.
Fig. 3 is the structural schematic diagram of rocker arm of the invention.
Fig. 4 is the cross-sectional view in Fig. 3 at A-A.
Fig. 5 is the axial diagrammatic cross-section of the fixed part of rocker arm.
Fig. 6 is the lateral diagrammatic cross-section of the fixed part of rocker arm.
Fig. 7 is the structural schematic diagram of flap.
Fig. 8 is the diagrammatic cross-section of valve rod.
Fig. 9 is the side view of valve rod.
Figure 10 is electrical schematic diagram.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiment is only a part of the embodiments of the present invention, instead of all the embodiments.Base
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts it is all its
His embodiment, shall fall within the protection scope of the present invention.
It is to be appreciated that the directional instruction (such as up, down, left, right, before and after ...) of institute is only used in the embodiment of the present invention
In explaining in relative positional relationship, the motion conditions etc. under a certain particular pose (as shown in the picture) between each component, if should
When particular pose changes, then directionality instruction also correspondingly changes correspondingly.
In the present invention unless specifically defined or limited otherwise, term " connection ", " fixation " etc. shall be understood in a broad sense,
For example, " fixation " may be a fixed connection, it may be a detachable connection, or integral；It can be mechanical connection, be also possible to
Electrical connection；It can be directly connected, the connection inside two elements or two can also be can be indirectly connected through an intermediary
The interaction relationship of a element, unless otherwise restricted clearly.It for the ordinary skill in the art, can basis
Concrete condition understands the concrete meaning of above-mentioned term in the present invention.
In addition, the description for being such as related to " first ", " second " in the present invention is used for description purposes only, and should not be understood as
Its relative importance of indication or suggestion or the quantity for implicitly indicating indicated technical characteristic.Define as a result, " first ",
The feature of " second " can explicitly or implicitly include at least one of the features.In addition, the technical side between each embodiment
Case can be combined with each other, but must be based on can be realized by those of ordinary skill in the art, when the combination of technical solution
Conflicting or cannot achieve when occur will be understood that the combination of this technical solution is not present, also not the present invention claims guarantor
Within the scope of shield.
The present invention provides a kind of extraction check valve convenient for on-line maintenance comprising valve body, be set to the intracorporal valve seat 11 of valve,
Rocker arm 8, flap 9 and valve deck 10, wherein valve body is integrated casting and forming, and one end in valve body 5 is equipped with an annular groove, the valve
Seat is embedded in the annular groove, and is fixedly connected by built-up welding, the junction of valve seat and valve body for heap postwelding, and light is carried out
Sliding grinding process, the flap are fixed in valve body by rocker arm, and the rocker arm upper end is fixed in valve body by axis, institute
It states flap and valve seat constitutes sealing cooperation, the valve deck is arranged above valve body, and any side of valve body is equipped with pneumatic operation
Mechanism, the pneumatic operator are linked by valve rod and rocker arm, and one end part of the rocker arm extends to form outward
Step 86, described valve rod one end engaged therewith are equipped with raised, the face contact of the protrusion and the non-stepped portions 87 of rocker arm, and can
The opposite non-stepped portions sliding, the first position that there is the protrusion side of rotation counterclockwise and the step 86 of rocker arm to contradict
With rotate clockwise the second position contradicted with the other side of the step of rocker arm, cooperated using the clutch of valve rod and rocker arm, can be with
Realize that when protrusion is in first position, pneumatic operator is inconsistent with the step of rocker arm using the protrusion of valve rod, limits valve
The unlatching of valve, and a distance has been reserved when protrusion is in the second position, between protrusion and rocker arm, rocker arm can be made to turn
It is dynamic, to realize that flap is opened under the impact of medium.
And valve rod is used directly to cooperate with rocker arm, rocking motion is directly driven using valve rod, therefore between axis 6 and rocker arm not
It is linked, therefore axis and rocker arm can be made into movable connection type, the support shaft by axis 6 as rocker arm
It uses, and in on-bne repair, it is only necessary to it removes start-up operation mechanism and the axle sleeve at valve body both ends is set, it can be by axis
It takes out, so as to realize the disassembly to rocker arm and flap.
The valve body both ends are equipped with detachable axle sleeve 4, and the valve rod 3 passes through any one detachable axle sleeve and rocker arm phase
Adaptation, axis one end of the rocker arm are limited by detachable axle sleeve, and the other end then by valve stem spacing, utilizes the detachable axle sleeve at both ends
And valve rod, axis is limited, and certain supporting role is played to it, and valve rod is equipped with an inner hole 32, one end of axis
It can be plugged in the inner hole, and can not rotate and rotate with valve rod, and a boss can be set in the other end of axis, in detachable shaft
Setting slot compatible with boss, can rotate to avoid axis with rocker arm in set.In addition setting filler is close in detachable axle sleeve
Envelope, axis or valve rod constitute circumferential sealing with packing seal and cooperate.
One end of the valve rod is equipped with protrusion 31, and the protrusion is circumferentially arranged along valve rod, and the arc length of the protrusion is less than
The half of the perimeter of valve rod.The rocker arm includes rocking lever 82 and the fixed part 81 with perforation 88, and the step is along fixed
Portion is circumferentially distributed, and the arc length of the step is the half of fixed part perimeter.To guarantee that valve rod has centainly relative to shaft
Rotation space.And it can realize that the clutch between valve rod and rocker arm is designed using this rotation space.
Valve seat and the sealing surface of flap cooperation are designed to inclined-plane, and the gravity that can use flap itself is preferably pasted with valve seat
It closes.
Pneumatic operator is detachably secured to one end of the valve body by fixed frame 2.Pneumatic operator is detachable
It is fixed on fixed frame 2.
The pneumatic operator includes including cylinder 1, quick closing valve component and drive rod, and the actuator and valve rod link
Cooperation.The quick closing valve component includes sequentially connected gas source, three components of gas source processing, solenoid valve and exhaust valve.In solenoid valve
Manual isolation ball valve is set between exhaust valve, can be closed by the speed using solenoid valve or speed opens effect to realize the fast of flap
Speed closure.
The flap includes discoid basal disc, and the basal disc center is equipped with fixed link, along fixed link center shape outward
At cambered surface 91, the position that the rocker arm is contacted with cambered surface is inclined-plane 84.Using the cooperation of cambered surface and inclined-plane, flap and rocker arm are improved
Cooperation freedom degree can flap be preferably bonded with valve seat using its freedom degree, guarantee No leakage, and use oblique
The mode in face and inclined-plane, after long-time is impacted, which may be caused between occurring between flap and valve seat due to abrasion
Gap causes to reveal.
The fixed link includes the tight lock part that the rounded sleeved part 92 in section and diameter are less than sleeved part maximum gauge
93.The rocker arm includes rocking lever, and the rocking lever 82 is equipped with auxiliary section 83, and the auxiliary section is equipped with and is adapted with sleeved part
Overlap aperture, the inner wall of the overlap aperture 85 and the tangent setting of sleeved part.The inner wall of the overlap aperture and the tangent setting of sleeved part,
The mutually card of spherical sleeved part and overlap aperture is arranged, and it is even closer when cooperation can to guarantee that flap is inserted into, insertion cooperation
Afterwards due to the position-limiting action of spherical surface, the effect for preventing loosening can be played.
And the rear end of fixed link continues to extend to form limiting section 94, and be located on the route that flap is opened on the inside of valve body and set
A locating part 12 is set, using the position-limiting action of limiting section and locating part, realizes the limit of flap opening angle.
In the side of the non-pneumatic operator installation of valve, the indicator 7 that setting is linked with rocker arm is used to indicate valve
In addition the opening angle of valve can install travel switch to observe opening angle now, realize online data transmission.
Embodiment is not construed as limitation of the present invention, but any based on spiritual improvements introduced of the invention, all should be
Within protection scope of the present invention.
Claims (10)
1. a kind of extraction check valve convenient for on-line maintenance comprising valve body, be set to the intracorporal valve seat of valve, rocker arm, flap and
Valve deck, the flap are fixed in valve body by rocker arm, and the rocker arm upper end is fixed in valve body by axis, the flap
Sealing cooperation is constituted with valve seat, the valve deck is arranged above valve body, and any side of valve body is equipped with pneumatic operator,
Be characterized in that: the pneumatic operator is linked by valve rod and rocker arm, and one end part of the rocker arm extends outward
Step is formed, described valve rod one end engaged therewith is equipped with raised, the face contact of the protrusion and the non-stepped portions of rocker arm, and can
Opposite non-stepped portions sliding, the first position that there is the protrusion side of rotation counterclockwise and the step of rocker arm to contradict and
Rotate clockwise the second position contradicted with the other side of the step of rocker arm.
2. a kind of extraction check valve convenient for on-line maintenance according to claim 1, it is characterised in that: the valve body both ends
It is equipped with detachable axle sleeve, the valve rod passes through any one detachable axle sleeve and is adapted with rocker arm, axis one end of the rocker arm
It is limited by detachable axle sleeve, the other end is then by valve stem spacing.
3. a kind of extraction check valve convenient for on-line maintenance according to claim 2, it is characterised in that: the axis it is any
One end is equipped with locating part, and the locating part and detachable axle sleeve constitute the limit to rotate in a circumferential direction.
4. a kind of extraction check valve convenient for on-line maintenance according to claim 1, it is characterised in that: the one of the valve rod
End is equipped with protrusion, and the protrusion is circumferentially arranged along valve rod, and the arc length of the protrusion is less than the half of the perimeter of valve rod.
5. a kind of extraction check valve convenient for on-line maintenance according to claim 1, it is characterised in that: the rocker arm includes
Rocking lever and fixed part with perforation, the step is circumferentially distributed along fixed part, and the arc length of the step is fixed part
The half of perimeter.
6. a kind of extraction check valve convenient for on-line maintenance according to claim 1, it is characterised in that: pneumatic operator
One end of the valve body is detachably secured to by fixed frame.
7. a kind of extraction check valve convenient for on-line maintenance according to claim 1 or 6, it is characterised in that: described pneumatic
Operating mechanism includes including cylinder, quick closing valve component and drive rod, and the actuator is linked with valve rod.
8. a kind of extraction check valve convenient for on-line maintenance according to claim 1, it is characterised in that: the flap includes
Discoid basal disc, the basal disc center are equipped with fixed link, form cambered surface, the rocker arm and cambered surface outward along fixed link center
The position of contact is inclined-plane.
9. a kind of extraction check valve convenient for on-line maintenance according to claim 8, it is characterised in that: the fixed link packet
It includes the rounded sleeved part in section and diameter is less than the tight lock part of sleeved part maximum gauge.
10. a kind of extraction check valve convenient for on-line maintenance according to claim 9, it is characterised in that: the rocker arm packet
Rocking lever is included, the rocking lever is equipped with auxiliary section, and the auxiliary section is equipped with overlap aperture compatible with sleeved part, and the set is penetrated
The inner wall in hole and the tangent setting of sleeved part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811622026.4A CN109723869A (en) | 2018-12-28 | 2018-12-28 | A kind of extraction check valve convenient for on-line maintenance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811622026.4A CN109723869A (en) | 2018-12-28 | 2018-12-28 | A kind of extraction check valve convenient for on-line maintenance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109723869A true CN109723869A (en) | 2019-05-07 |
Family
ID=66297468
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811622026.4A Pending CN109723869A (en) | 2018-12-28 | 2018-12-28 | A kind of extraction check valve convenient for on-line maintenance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109723869A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111998121A (en) * | 2020-07-28 | 2020-11-27 | 中广核核电运营有限公司 | Overhauling and positioning device for spray valve and overhauling and positioning method thereof |
| CN112361037A (en) * | 2020-11-19 | 2021-02-12 | 沈伟光 | Quick-closing type air-extracting check valve |
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| US20180209555A1 (en) * | 2015-08-20 | 2018-07-26 | Fmc Technologies, Inc. | Flapper Valve with Improved Flapper |
| KR20180089664A (en) * | 2017-02-01 | 2018-08-09 | 이병순 | Check Valve Provided With Disc From Which Hinge Is Seperated |
| CN207715831U (en) * | 2017-10-20 | 2018-08-10 | 中核苏阀科技实业股份有限公司 | A kind of built-in revolve of axis pin opens check-valves |
| CN108644433A (en) * | 2018-07-09 | 2018-10-12 | 江南阀门有限公司 | High exhaust check valve |
| CN208138522U (en) * | 2018-03-01 | 2018-11-23 | 浙江英博阀门科技股份有限公司 | Swing type self-sealing check-valves |
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| US4274436A (en) * | 1979-08-16 | 1981-06-23 | Xomox Corporation | Wafer-type swing check valve construction |
| WO1997015770A1 (en) * | 1995-10-27 | 1997-05-01 | H-Tech, Inc. | Swing check valve and method for repairing same |
| US20070044847A1 (en) * | 2005-09-01 | 2007-03-01 | Yang Fa Men Industrial Co., Ltd. | Connecting structure for a check valve |
| CN202349292U (en) * | 2011-11-22 | 2012-07-25 | 格朗富（苏州）集团有限公司 | Rotary shaft structure of check valve |
| CN104254722A (en) * | 2011-12-02 | 2014-12-31 | 滨特尔流体服务股份公司 | Quick maintenance undersea check valve |
| CN202392192U (en) * | 2011-12-29 | 2012-08-22 | 四川耐特阀门有限公司 | Durable steam extraction check valve |
| CN202580156U (en) * | 2012-01-06 | 2012-12-05 | 孟国益 | Hanging gate type operation seat of 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 |
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| CN206310002U (en) * | 2016-12-21 | 2017-07-07 | 苏州艾尔泰流体控制有限公司 | A kind of check-valves and conduit assembly |
| KR20180089664A (en) * | 2017-02-01 | 2018-08-09 | 이병순 | Check Valve Provided With Disc From Which Hinge Is Seperated |
| CN206904312U (en) * | 2017-06-21 | 2018-01-19 | 南通市电站阀门有限公司 | A kind of extraction check valve |
| CN207261738U (en) * | 2017-09-11 | 2018-04-20 | 南通市电站阀门有限公司 | Check-valves is opened in one kind rotation |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111998121A (en) * | 2020-07-28 | 2020-11-27 | 中广核核电运营有限公司 | Overhauling and positioning device for spray valve and overhauling and positioning method thereof |
| CN112361037A (en) * | 2020-11-19 | 2021-02-12 | 沈伟光 | Quick-closing type air-extracting check valve |
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| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
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Application publication date: 20190507 |