CN107061804A - Protecting against shock swing check valve - Google Patents
Protecting against shock swing check valve Download PDFInfo
- Publication number
- CN107061804A CN107061804A CN201710233756.4A CN201710233756A CN107061804A CN 107061804 A CN107061804 A CN 107061804A CN 201710233756 A CN201710233756 A CN 201710233756A CN 107061804 A CN107061804 A CN 107061804A
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- China
- Prior art keywords
- flap
- buffering
- baffle
- box
- back side
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- 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.)
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K15/00—Check valves
- F16K15/02—Check valves with guided rigid valve members
- F16K15/03—Check valves with guided rigid valve members with a hinged closure member or with a pivoted closure member
- F16K15/035—Check valves with guided rigid valve members with a hinged closure member or with a pivoted closure member with a plurality of valve members
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Check Valves (AREA)
Abstract
The invention discloses a kind of protecting against shock swing check valve, it is characterised in that：Rocking bar lower end is provided with circular buffer unit, and the circular buffer unit includes:Baffle-box and buffering flap, during flap is closed, the speed of flap closing is effectively reduced using circular buffer unit, while in flap turn-off transient, when outlet-side media backwashes, medium is by being arranged on the buffering flap of buffering box cavity and setting the recoil hole at baffle-box back, and the setting of cushion chamber, the effect to backflow one buffering of formation of outlet-side media, prevent water hammer, prevent from destroying valve, with prominent substantive distinguishing features and significant progress.
Description
Technical field
The present invention relates to the improvement hair of a kind of improvement of check-valves invention, more particularly to a kind of protecting against shock swing check valve
It is bright.
Background technology
Check-valves is a kind of valve commonly used in pipe-line system, is mostly installed at the outlet of pump, and it is used to connect and non-return
Fluid media (medium) in pipe-line system.Existing swing check valve mainly includes valve body, valve seat and non-return flap, and valve seat is provided with valve seat
Sealing surface, and be fixed in valve flowing channel, non-return flap is provided with valve clack sealing surface, and is arranged on body cavity using bearing pin, when
When medium is from valve inlet side into body cavity, medium promotes non-return flap to be rotarily opened around bearing pin, when valve inlet side is without medium
Enter fashionable, non-return flap is around bearing pin rotary closing.Its shortcoming is：Non-return flap holds during around bearing pin rotary closing
It is also easy to produce that closing velocity is too fast, causes valve clack sealing surface excessive to the impulsive force of sealing surface of seat, be easily damaged；Meanwhile, non-return
Flap easily produces water hammer in quick closedown, causes valve to be occurred by the Harm such as destroying.
The content of the invention
The technical problems to be solved by the invention are to overcome the deficiencies in the prior art there is provided a kind of valve inlet side pressure medium
When closing suddenly, non-return flap is slowly rotatably closed, and is prevented sealing surface impact failure, is prevented that water hammer, service life are long
Protecting against shock swing check valve.
In order to solve the above-mentioned technical problem, the present invention adopts the following technical scheme that to realize：The protecting against shock swing type
Check-valves, including valve body, bonnet, valve seat, non-return flap, bearing pin and rocking bar, the bonnet are arranged on body top, the valve body
Middle part is provided with chamber, and valve body two ends are provided with the runner for flow of media, and valve seat is provided with sealing surface of seat, and installed in valve body import
In the runner of side, bearing pin is fixedly mounted on chamber top, and non-return flap front is provided with can form sealedly only with sealing surface of seat
Valve clack sealing surface is returned, rocking bar upper end is connected with bearing pin formation hinge type, it is characterised in that：Rocking bar lower end is provided with circular buffering dress
Put, the circular buffer unit includes:Baffle-box and buffering flap, baffle-box is into circular slot type structure, and baffle-box is internally formed
One inner chamber, the baffle-box back side is fixed on the non-return flap back side, is provided with baffle-box front at return port, the hole wall of the return port
Provided with buffering valve seat, the buffering valve seat buffers sealing surface of seat towards one end inside baffle-box provided with taper, and buffering flap is set
Put in the inner chamber of baffle-box, it is close that the front of the buffering flap can form sealed circular arc provided with one with buffering sealing surface of seat
Front cover；In guide collar of the non-return flap back side provided with cylindrical rear boss and tubulose, the rear boss is arranged on the interior of guide collar
Portion, the inside of the rear boss is provided with centre bore, and the centre bore entrance point is connected with the runner of valve body import side, and the centre bore does not have
Have an insertion rear boss, the back side of buffering flap provided with an outer spigot surface with being oriented to ring outer wall formation guiding and one with it is rear convex
Platform is cylindrical to form the interior spigot surface being oriented to, and O-ring seal is provided with the outer spigot surface；Guide collar inwall, rear boss are cylindrical, stop
Return between the flap back side and the buffering flap back side and form a cushion chamber, compression spring, the compression bullet are provided with the cushion chamber
One end of spring is connected with the buffering flap back side, and the other end of the compression spring is connected with the back side of non-return flap；At center
It is provided with spout hole between hole wall and cushion chamber, the axis of the spout hole and the axis of rear boss are into plumbness, the spout hole one
End is communicated with centre bore, and the other end is communicated with cushion chamber；It is oriented to ring outer wall, baffle-box internal chamber wall and buffers shape between the flap back side
Into a compression chamber, at the buffering flap back side towards compression chamber provided with compression circular arc；, should at the cylindrical place of valve seat provided with recoil platform
Platform recoil provided with a recoil plane, the recoil plane is parallel with sealing surface of seat, and towards the baffle-box back side；In baffle-box
The back side is provided with recoil hole, and this is counter to be punching into Laval nozzle type structure, and the recoil hole entrance point is communicated with compression chamber, the recoil hole
The port of export communicated with the chamber in valve body, and towards recoil plane.
The quantity in the recoil hole is 10~20, is circumferentially distributed on the cushion chamber back side.
The outside diameter of the baffle-box is cylindrical direct 1.2~1.5 times of the non-return flap.
The assembly method of protecting against shock swing check valve of the present invention is as follows：
1. the assembling of valve body, valve seat and the platform that recoils：Valve seat is arranged in the runner of valve body import side, keep valve base sealing facing to
The runner of valve outlet side, recoil platform is fixedly mounted on the cylindrical place of valve seat, keeps recoil plane parallel with sealing surface of seat, and
Towards the runner of valve outlet side；
2. the assembling of the circular part such as buffer unit and non-return flap：O-shaped sealing is provided with the outer spigot surface of buffering flap
Circle, then will buffering flap and O-ring seal load buffering box cavity, keep buffering flap just facing to trimmer valve seat, and
Arc-shaped seal surface is set to be sealed with buffering sealing surface of seat formation；In the rear boss and tubulose of non-return flap rear cylindrical
Load compression spring between guide collar, the baffle-box back side is fixed on the non-return flap back side, make rear boss cylindrical and buffering flap
Interior spigot surface formation is oriented to, and guide collar is cylindrical to be oriented to the formation of outer spigot surface;
3. overall package：Bearing pin is fixedly mounted on chamber top, and the component that sequence number 2 is completed is fixedly mounted on rocking bar lower end, shakes
Bar upper end is connected with bearing pin formation hinge type, keeps non-return valve clack sealing surface to be sealed with sealing surface of seat formation;
4. pressure test：A. hydraulic pressure strength is tested：Closed valve outlet side, test(ing) medium is passed through from valve body import side, slow to rise
Strengh testing pressure is pressed onto, observation valve surface has No leakage；B. pressurized seal is tested：Air is passed through from valve outlet side, slowly
Test pressure is boosted to, there is No leakage observation valve inlet side；
5. the protecting against shock swing check valve of pass the test is dried up, outer surface japanning, storage.
The beneficial effects of the invention are as follows:Protecting against shock swing check valve after improvement is utilized during flap is closed
Circular buffer unit effectively reduces the speed of flap closing, while in flap turn-off transient, when outlet-side media backwashes, medium
By being arranged on buffering flap and the setting in the recoil hole for setting baffle-box back, and cushion chamber of buffering box cavity, to outlet
The backflow of side medium forms the effect of a buffering, prevents water hammer, prevents from destroying valve, with prominent substantive distinguishing features
With significant progress；This assembly method has the advantages that precision height, qualification rate are high.
Brief description of the drawings
The embodiment to the present invention is described in further detail below in conjunction with the accompanying drawings.
Fig. 1 is schematic structural view of the invention.
Fig. 2 is the structural representation of part non-return flap of the present invention and buffer unit.
Embodiment
Accompanying drawing illustrates the structure of the present invention, further illustrates it about details, protecting against shock rotation in conjunction with accompanying drawing below
Opening formula check-valves, including valve body 1, bonnet 10, valve seat 2, non-return flap 3, bearing pin 9, rocking bar 8 and circular buffer unit, the valve
Lid 10 is arranged on the top of valve body 1, and the middle part of valve body 1 is provided with chamber, and the two ends of valve body 1 are provided with the runner for flow of media, valve seat 2
Provided with sealing surface of seat, and in the runner of valve body import side, bearing pin 9 is fixedly mounted on chamber top, and non-return flap 3 is just
Face is connected provided with that can form sealed non-return valve clack sealing surface, the upper end of rocking bar 8 with sealing surface of seat with the formation hinge type of bearing pin 9,
Circular buffer unit is arranged on the lower end of rocking bar 8, and the circular buffer unit includes:Baffle-box 7 and buffering flap 5, baffle-box 7 is into circle
Shape slot type structure, baffle-box 7 is internally formed an inner chamber, and the back side of baffle-box 7 is fixed on the back side of non-return flap 3, in baffle-box 7
Front is provided with return port 17, provided with buffering valve seat at the hole wall of the return port 17, and the buffering valve seat is towards one inside baffle-box
End buffers sealing surface of seat provided with taper, and buffering flap 5 is arranged on the inner chamber of baffle-box, and the front of the buffering flap 5 is provided with one
It is individual to form sealed arc-shaped seal surface with buffering sealing surface of seat；In rear boss of the back side of non-return flap 3 provided with cylinder
19 and the guide collar 13 of tubulose, the rear boss 19 is arranged on the inside of guide collar 13, and the inside of the rear boss 19 is provided with centre bore
11, the entrance point of centre bore 11 is connected with the runner of valve body import side, and the centre bore 11 has no through rear boss, buffers flap
5 back side is oriented to provided with an outer spigot surface being oriented to the formation of the outer wall of guide collar 13 and one with the cylindrical formation of rear boss 19
Interior spigot surface, is provided with O-ring seal 14 at the outer spigot surface；The inwall of guide collar 13, rear boss 19 are cylindrical, non-return flap 3 is carried on the back
A cushion chamber 12 is formed between face and buffering flap 5 back side, compression spring 4, the compression spring 4 are provided with the cushion chamber 12
One end be connected with buffering flap 5 back side, the other end of the compression spring 4 is connected with the back side of non-return flap 3；At center
It is provided with spout hole between hole wall and cushion chamber 12, the axis of the spout hole and the axis of rear boss 19 are into plumbness, the overflow
Hole one end is communicated with centre bore 11, and the other end is communicated with cushion chamber 12；The outer wall of guide collar 13, the internal chamber wall of baffle-box 7 and trimmer valve
A compression chamber 16 is formed between the back side of valve 5, at the back side of buffering flap 5 towards compression chamber 16 provided with compression circular arc 18；In valve
2 cylindrical places of seat are provided with recoil platform 6, and the recoil platform 6 is provided with a recoil plane, and the recoil plane is parallel with sealing surface of seat,
And towards the back side of baffle-box 7；At the back side of baffle-box 7 provided with recoil hole 15, the recoil hole 15 is into Laval nozzle type structure, and this is anti-
The entrance point of punching 15 is communicated with compression chamber 16, and the port of export in the recoil hole 15 is communicated with the chamber in valve body 1, and flat towards recoil
Face.
The assembly method of protecting against shock swing check valve of the present invention is as follows：
1. the assembling of valve body 1, valve seat 2 and the platform 6 that recoils：Valve seat 2 is arranged in the runner of the inlet side of valve body 1, keeps valve base sealing
Facing to the runner of valve outlet side, recoil platform 6 is fixedly mounted on the cylindrical place of valve seat 1, keeps recoil plane and sealing surface of seat
It is parallel, and towards the runner of valve outlet side；
2. the assembling of circular buffer unit and the grade part of non-return flap 3：O-shaped sealing is provided with the outer spigot surface of buffering flap 5
Circle 14, then loads the inner chamber of baffle-box 7 by buffering flap 5 and O-ring seal 14, keep buffering flap 5 just facing to buffering
Valve seat, and arc-shaped seal surface is sealed with buffering sealing surface of seat formation；In the rear boss of the rear cylindrical of non-return flap 3
Load compression spring 4 between 19 and the guide collar 13 of tubulose, the back side of baffle-box 7 is fixed on the back side of non-return flap 3, makes rear boss 19
The cylindrical interior spigot surface formation with buffering flap 5 is oriented to, and guide collar 13 is cylindrical to be oriented to the formation of outer spigot surface;
3. overall package：Bearing pin 9 is fixedly mounted on chamber top, and the component that sequence number 2 is completed is fixedly mounted on the lower end of rocking bar 8,
The upper end of rocking bar 8 is connected with the formation hinge type of bearing pin 9, keeps non-return valve clack sealing surface to be sealed with sealing surface of seat formation;
4. pressure test：A. hydraulic pressure strength is tested：Closed valve outlet side, test(ing) medium is passed through from valve body import side, slow to rise
Strengh testing pressure is pressed onto, observation valve surface has No leakage；B. pressurized seal is tested：Air is passed through from valve outlet side, slowly
Test pressure is boosted to, there is No leakage observation valve inlet side；
5. the protecting against shock swing check valve of pass the test is dried up, outer surface japanning, storage.
When medium from the inlet side of the valve enters fashionable, medium promotes non-return flap and circular buffer unit, in rocking bar
Rotarily opened under drive around bearing pin, medium is discharged from the outlet side of the valve；Now medium is reached by centre bore, spout hole
Cushion chamber, buffering flap is in the presence of compression spring, and the positive arc-shaped seal surface of buffering flap compresses buffering valve base sealing
Face.
When the valve inlet side medium is interrupted suddenly, the gentle flushing device of non-return flap is returned from gravity and outlet-side media
Around bearing pin rotary closing under raw impulsive force of miscarrying, during closing, outlet-side media promotes trimmer valve by return port
Moved after valve, trimmer valve flap seal emaciated face is from buffering sealing surface of seat, and the medium that outlet-side media enters in compression chamber, compression chamber exists
Recoil plane is sprayed to by hole of recoiling under the impetus for compressing circular arc, so that opposite with medium flow field in baffle-box back side production one
Recoil strength, reduce the closing velocity of buffer unit and non-return flap, reduce last time flap with the impact of flap, reduce non-return
The damage of valve clack sealing surface and sealing surface of seat, prevents the generation of water hammer；Moved after buffering flap simultaneously during, delay
The medium for rushing intracavitary flows out under the promotion at the buffering flap back side from spout hole toward centre bore, reduces the speed moved after buffering flap
Degree, reduces impulsive force of the buffering flap to non-return flap.
In summary, presently preferred embodiments of the present invention is these are only, is not intended to limit the scope of the present invention.
Within the spirit and principles of the invention, any modification, equivalent substitution and improvements made etc., should be included in the present invention's
Within protection domain.
Claims (3)
1. a kind of protecting against shock swing check valve, including valve body, bonnet, valve seat, non-return flap, bearing pin and rocking bar, the bonnet
Installed in body top, chamber is provided with the middle part of the valve body, valve body two ends are provided with the runner for flow of media, and valve seat is provided with valve seat
Sealing surface, and in runner, bearing pin is fixedly mounted on chamber top, and non-return flap front is provided with can be with sealing surface of seat shape
Into sealed non-return valve clack sealing surface, rocking bar upper end is connected with bearing pin formation hinge type, it is characterised in that：Rocking bar lower end is provided with
Circular buffer unit, the circular buffer unit includes:Baffle-box and buffering flap, baffle-box is into circular slot type structure, baffle-box
Be internally formed an inner chamber, the baffle-box back side is fixed on the non-return flap back side, baffle-box front be provided with return port, the backflow
Provided with buffering valve seat at the hole wall in hole, the buffering valve seat buffers sealing surface of seat towards one end inside baffle-box provided with taper,
Buffering flap is arranged on the inner chamber of baffle-box, and the front of the buffering flap can be sealed provided with one with buffering sealing surface of seat formation
Arc-shaped seal surface；In guide collar of the non-return flap back side provided with cylindrical rear boss and tubulose, the rear boss is arranged on
The inside of guide collar, the inside of the rear boss is provided with centre bore, and the centre bore entrance point is connected with the runner of valve body import side,
The centre bore has no through rear boss, the back side of buffering flap provided with an outer spigot surface with being oriented to ring outer wall formation guiding and
One with rear boss it is cylindrical formed be oriented to interior spigot surface, at the outer spigot surface be provided with O-ring seal；Guide collar inwall, after
Boss is cylindrical, a cushion chamber is formed between the non-return flap back side and the buffering flap back side, provided with compression bullet in the cushion chamber
Spring, one end of the compression spring is connected with the buffering flap back side, the other end of the compression spring and the back side phase of non-return flap
Connection；Between center hole wall and cushion chamber be provided with spout hole, the axis of the spout hole and the axis of rear boss into plumbness,
The spout hole one end is communicated with centre bore, and the other end is communicated with cushion chamber；It is oriented to ring outer wall, baffle-box internal chamber wall and buffering flap
A compression chamber is formed between the back side, at the buffering flap back side towards compression chamber provided with compression circular arc；Set at the cylindrical place of valve seat
There is recoil platform, the recoil platform is provided with a recoil plane, and the recoil plane is parallel with sealing surface of seat, and is carried on the back towards baffle-box
Face；At the baffle-box back side provided with recoil hole, this is counter to be punching into Laval nozzle type structure, the recoil hole entrance point and compression chamber phase
Logical, the port of export in the recoil hole is communicated with the chamber in valve body, and towards recoil plane.
2. protecting against shock swing check valve according to claim 1, it is characterised in that：The quantity in the recoil hole be 10~
20, circumferentially it is distributed on the cushion chamber back side.
3. protecting against shock swing check valve according to claim 1, it is characterised in that：The outside diameter of the baffle-box is
Cylindrical direct 1.2~1.5 times of the non-return flap.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710233756.4A CN107061804B (en) | 2017-04-11 | 2017-04-11 | Protecting against shock swing check valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710233756.4A CN107061804B (en) | 2017-04-11 | 2017-04-11 | Protecting against shock swing check valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107061804A true CN107061804A (en) | 2017-08-18 |
| CN107061804B CN107061804B (en) | 2018-11-02 |
Family
ID=59601840
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710233756.4A Active CN107061804B (en) | 2017-04-11 | 2017-04-11 | Protecting against shock swing check valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107061804B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107477195A (en) * | 2017-09-22 | 2017-12-15 | 浙江工业大学 | A kind of feed inlet sealing device |
| CN108953697A (en) * | 2018-08-13 | 2018-12-07 | 李琼 | A kind of band guide rod check-valves |
| CN110259997A (en) * | 2019-06-28 | 2019-09-20 | 浙江万龙机械有限公司 | A kind of swing check valve being built-in with Slow Close mechanism and water hammer-resistant check-valves |
| CN110319211A (en) * | 2019-08-01 | 2019-10-11 | 济南迈克阀门科技有限公司 | Wet alarm valve is compensated in a kind of |
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| CN201273387Y (en) * | 2008-09-05 | 2009-07-15 | 广东联塑科技实业有限公司 | Check valve and its rocker |
| CN201487322U (en) * | 2009-08-22 | 2010-05-26 | 宁波一机阀门制造有限公司 | Check valve with valve plate slow closure function |
| JP2013133842A (en) * | 2011-12-26 | 2013-07-08 | Kawasaki Heavy Ind Ltd | Swing type check valve |
| CN203335950U (en) * | 2013-07-02 | 2013-12-11 | 温州蓝天管件阀门有限公司 | Shock-free swing check valve |
| CN203614823U (en) * | 2013-10-30 | 2014-05-28 | 天津市圣恺工业技术发展有限公司 | Ceramic seal rotary-opening and slowly-closing type check valve |
| CN104847930A (en) * | 2015-04-18 | 2015-08-19 | 张新丰 | Slow-closed rotary-opened type check valve capable of preventing water hammer |
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2017
- 2017-04-11 CN CN201710233756.4A patent/CN107061804B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201273387Y (en) * | 2008-09-05 | 2009-07-15 | 广东联塑科技实业有限公司 | Check valve and its rocker |
| CN201487322U (en) * | 2009-08-22 | 2010-05-26 | 宁波一机阀门制造有限公司 | Check valve with valve plate slow closure function |
| JP2013133842A (en) * | 2011-12-26 | 2013-07-08 | Kawasaki Heavy Ind Ltd | Swing type check valve |
| CN203335950U (en) * | 2013-07-02 | 2013-12-11 | 温州蓝天管件阀门有限公司 | Shock-free swing check valve |
| CN203614823U (en) * | 2013-10-30 | 2014-05-28 | 天津市圣恺工业技术发展有限公司 | Ceramic seal rotary-opening and slowly-closing type check valve |
| CN104847930A (en) * | 2015-04-18 | 2015-08-19 | 张新丰 | Slow-closed rotary-opened type check valve capable of preventing water hammer |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107477195A (en) * | 2017-09-22 | 2017-12-15 | 浙江工业大学 | A kind of feed inlet sealing device |
| CN107477195B (en) * | 2017-09-22 | 2024-01-09 | 浙江工业大学 | Feed inlet sealing device |
| CN108953697A (en) * | 2018-08-13 | 2018-12-07 | 李琼 | A kind of band guide rod check-valves |
| CN110259997A (en) * | 2019-06-28 | 2019-09-20 | 浙江万龙机械有限公司 | A kind of swing check valve being built-in with Slow Close mechanism and water hammer-resistant check-valves |
| CN110259997B (en) * | 2019-06-28 | 2020-08-07 | 浙江万龙机械有限公司 | Swing check valve with built-in slow-closing mechanism and waterproof hammer check valve |
| CN110319211A (en) * | 2019-08-01 | 2019-10-11 | 济南迈克阀门科技有限公司 | Wet alarm valve is compensated in a kind of |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107061804B (en) | 2018-11-02 |
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Effective date of registration: 20220324 Address after: 157009 No. 18, Wenhua street, Aimin District, Mudanjiang City, Heilongjiang Province Patentee after: MUDANJIANG BEIFANG OILFIELD MACHINERY CO.,LTD. Address before: 325113 5 Jinyuan Road, Yugen village, Yan tou Town, Yongjia, Wenzhou, Zhejiang Patentee before: Zhang Xinfeng |
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