CN106838384A - Protecting against shock swing check valve assembly method - Google Patents
Protecting against shock swing check valve assembly method Download PDFInfo
- Publication number
- CN106838384A CN106838384A CN201710234025.1A CN201710234025A CN106838384A CN 106838384 A CN106838384 A CN 106838384A CN 201710234025 A CN201710234025 A CN 201710234025A CN 106838384 A CN106838384 A CN 106838384A
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- Prior art keywords
- valve
- flap
- buffering
- back side
- seat
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- 230000035939 shock Effects 0.000 title claims abstract description 16
- 238000000034 method Methods 0.000 title claims abstract description 11
- 238000012360 testing method Methods 0.000 claims abstract description 17
- 239000000872 buffer Substances 0.000 claims abstract description 16
- 230000003139 buffering effect Effects 0.000 claims description 62
- 238000007789 sealing Methods 0.000 claims description 55
- 230000006835 compression Effects 0.000 claims description 26
- 238000007906 compression Methods 0.000 claims description 26
- 230000008676 import Effects 0.000 claims description 9
- 238000002474 experimental method Methods 0.000 claims description 6
- 230000015572 biosynthetic process Effects 0.000 claims description 4
- 238000004080 punching Methods 0.000 claims description 3
- 238000012797 qualification Methods 0.000 abstract description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 230000006378 damage Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
Classifications
-
- 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
Landscapes
- 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 assembly method, its step is：1. the assembling of valve body, valve seat and recoil platform；2. the assembling of the circular part such as buffer unit and non-return flap；3. overall package；4. pressure test；5. the protecting against shock swing check valve of pass the test is dried up, outer surface japanning, storage, this assembly method has the advantages that high precision, qualification rate are high.
Description
Technical field
The present invention relates to a kind of improvement invention of check-valves, more particularly to a kind of protecting against shock swing check valve assembling side
Method.
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, is 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 water hammer, long service life
Protecting against shock swing check valve and its assembly method.
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 stopping for sealing with sealing surface of seat
Valve clack sealing surface is returned, rocking bar upper end forms hinge type and is connected with bearing pin, 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 circular slot type structure, baffle-box are internally formed
One inner chamber, the baffle-box back side is fixed on the non-return flap back side, and return port is provided with baffle-box front, at the hole wall of the return port
Buffering valve seat is provided with, the buffering valve seat is provided with taper buffering sealing surface of seat towards the one end inside baffle-box, buffering flap sets
Put in the inner chamber of baffle-box, the front of the buffering flap is provided with one can be close with the circular arc that buffering sealing surface of seat forms sealing
Front cover；The rear boss of cylinder and the guide collar of tubulose are provided with the non-return flap back side, 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
There is insertion rear boss, the back side of buffering flap is provided with an outer spigot surface being oriented to guiding ring outer wall formation and one convex with rear
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 be cylindrical, only
Return between the flap back side and the buffering flap back side and form a cushion chamber, be provided with compression spring in the cushion chamber, the compression bullet
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
Spout hole is provided between hole wall and cushion chamber, 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 shape between ring outer wall, baffle-box internal chamber wall and the buffering flap back side
Into a compression chamber, compression circular arc is provided with the buffering flap back side towards compression chamber；Recoil platform is provided with the cylindrical place of valve seat, should
Recoil platform is provided with a recoil plane, and 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.
Protecting against shock swing check valve assembly method of the present invention is as follows：
1. the assembling of valve body, valve seat and recoil platform：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 form sealing with buffering sealing surface of seat；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 is formed and is oriented to, and cylindrical formation with outer spigot surface is oriented to guide collar；
3. overall package：Bearing pin is fixedly mounted on chamber top, and the component that sequence number 2 is completed is fixedly mounted on into rocking bar lower end, shakes
Bar upper end forms hinge type and is connected with bearing pin, keeps non-return valve clack sealing surface to be formed with sealing surface of seat and seals；
4. pressure test：A. hydraulic pressure strength experiment：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 experiment：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 the buffering flap of buffering box cavity and setting the recoil hole at baffle-box back, and cushion chamber setting, to outlet
The backflow of side medium forms an effect for buffering, prevents water hammer, prevents from destroying valve, with prominent substantive distinguishing features
It is progressive with significant；This assembly method has the advantages that high precision, qualification rate are high.
Brief description of the drawings
Specific embodiment of the 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.
Specific embodiment
Accompanying drawing illustrates structure of the invention, further illustrates it about details in conjunction with accompanying drawing below, protecting against shock rotation
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 the 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
Sealing surface of seat is provided with, 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 provided with the non-return valve clack sealing surface that sealing can be formed with sealing surface of seat, and the upper end of rocking bar 8 forms hinge type and is connected with 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 5,7 one-tenth circles of baffle-box
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, and buffering valve seat is provided with the hole wall of the return port 17, and the buffering valve seat is towards inside baffle-box
End is provided with taper buffering sealing surface of seat, 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
The individual arc-shaped seal surface that sealing can be formed with buffering sealing surface of seat；The rear boss of cylinder is provided with the back side of non-return flap 3
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 be provided with one with the outer wall of guide collar 13 formed be oriented to outer spigot surface and one it is cylindrical with rear boss 19 formed guiding
Interior spigot surface, O-ring seal 14 is provided with 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 is provided with the cushion chamber 12, the compression spring 4
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
Be provided with spout hole between hole wall and cushion chamber 12, the axis of the spout hole and the axis of rear boss 19 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, compression circular arc 18 is being provided with towards the back side of buffering flap 5 of compression chamber 16；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；The back side of baffle-box 7 be provided with recoil hole 15,15 one-tenth of recoil hole Laval nozzle type structure, 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.
Protecting against shock swing check valve assembly method of the present invention is as follows：
1. the assembling of valve body 1, valve seat 2 and recoil platform 6：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 formed sealing with buffering sealing surface of seat；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 with buffering flap 5 is formed and is oriented to, and cylindrical formation with outer spigot surface is oriented to guide collar 13；
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 into the lower end of rocking bar 8,
The upper end of rocking bar 8 forms hinge type and is connected with bearing pin 9, keeps non-return valve clack sealing surface to be formed with sealing surface of seat and seals；
4. pressure test：A. hydraulic pressure strength experiment：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 experiment：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 enters fashionable from the inlet side of the valve, medium promotes non-return flap and circular buffer unit, in rocking bar
Rotarily opened around bearing pin under drive, medium is discharged from the outlet side of the valve；Now medium is reached by centre bore, spout hole
Cushion chamber, in the presence of compression spring, the positive arc-shaped seal surface of buffering flap compresses buffering valve base sealing to buffering flap
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 enters compression chamber from buffering sealing surface of seat, outlet-side media, and the medium in compression chamber exists
Recoil plane is sprayed to by hole of recoiling under the impetus for compressing circular arc, so as to opposite with medium flow field in baffle-box back side product 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
Valve clack sealing surface and the damage of sealing surface of seat, prevent the generation of water hammer；Simultaneously during being moved after buffering flap, delay
The medium rushed in chamber flows out from spout hole under the promotion at the buffering flap back side toward centre bore, reduces the speed moved after buffering flap
Degree, reduces impulsive force of the buffering flap to non-return flap.
In sum, presently preferred embodiments of the present invention is these are only, is not intended to limit the scope of the present invention.
All any modification, equivalent substitution and improvements within the spirit and principles in the present invention, made etc., should be included in of the invention
Within protection domain.
Claims (1)
1. a kind of protecting against shock swing check valve assembly method, the protecting against shock swing check valve includes：Valve body, bonnet, valve seat,
Non-return flap, bearing pin and rocking bar, the bonnet are arranged on body top, and the valve body middle part is provided with chamber, and valve body two ends are provided with
For the runner of flow of media, valve seat is provided with sealing surface of seat, and in runner, bearing pin is fixedly mounted on chamber top, only
Go back to flap front and be provided with the non-return valve clack sealing surface that sealing can be formed with sealing surface of seat, rocking bar upper end forms hinge type with bearing pin
Connection, rocking bar lower end is provided with circular buffer unit, and the circular buffer unit includes:Baffle-box and buffering flap, baffle-box into
Circular slot type structure, baffle-box is internally formed an inner chamber, and the baffle-box back side is fixed on the non-return flap back side, in baffle-box just
Face is provided with return port, and buffering valve seat is provided with the hole wall of the return port, and the buffering valve seat is provided with towards the one end inside baffle-box
Taper buffers sealing surface of seat, and buffering flap is arranged on the inner chamber of baffle-box, the front of the buffering flap be provided with one can with it is slow
Rush the arc-shaped seal surface that sealing surface of seat forms sealing；The rear boss of cylinder and leading for tubulose are provided with the non-return flap back side
To circle, the rear boss is arranged on the inside of guide collar, and the inside of the rear boss is provided with centre bore, the centre bore entrance point and valve body
The runner of inlet side is connected, and the centre bore has no through rear boss, and the back side for buffering flap is provided with one with guiding ring outer wall
The outer spigot surface and an interior spigot surface for forming guiding cylindrical with rear boss being oriented to are formed, is provided with O-shaped at the outer spigot surface
Sealing ring；Guide collar inwall, rear boss are cylindrical, form a cushion chamber between the non-return flap back side and the buffering flap back side,
Be provided with compression spring in the cushion chamber, one end of the compression spring is connected with the buffering flap back side, the compression spring it is another
End is connected with the back side of non-return flap；Be provided with spout hole between center hole wall and cushion chamber, the axis of the spout hole with it is rear
Into plumbness, the spout hole one end is communicated the axis of boss with centre bore, and the other end is communicated with cushion chamber；Guiding ring outer wall,
A compression chamber is formed between baffle-box internal chamber wall and the buffering flap back side, pressure is provided with the buffering flap back side towards compression chamber
Contracting circular arc；Recoil platform is provided with the cylindrical place of valve seat, the recoil platform is provided with a recoil plane, the recoil plane and sealing surface of seat
It is parallel, and towards the baffle-box back side；Recoil hole is provided with the baffle-box back side, this is counter to be punching into Laval nozzle type structure, should
Recoil hole entrance point is communicated with compression chamber, and the port of export in the recoil hole is communicated with the chamber in valve body, and direction recoil plane；
Its assembly method is as follows：
1. the assembling of valve body, valve seat and recoil platform：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；
The assembling of the part such as circular buffer unit and non-return flap：O-ring seal is provided with the outer spigot surface of buffering flap, so
Buffering flap and O-ring seal are loaded into buffering box cavity afterwards, keep buffering flap just facing to trimmer valve seat, and make circular arc
Shape sealing surface can form sealing with buffering sealing surface of seat；In the rear boss and the guide collar of tubulose of non-return flap rear cylindrical
Between load compression spring, the baffle-box back side is fixed on the non-return flap back side, make rear boss it is cylindrical with buffering flap interior guiding
Face forms and is oriented to, and cylindrical formation with outer spigot surface is oriented to guide collar；
3. overall package：Bearing pin is fixedly mounted on chamber top, and the component that sequence number 2 is completed is fixedly mounted on into rocking bar lower end, shakes
Bar upper end forms hinge type and is connected with bearing pin, keeps non-return valve clack sealing surface to be formed with sealing surface of seat and seals；
4. pressure test：A. hydraulic pressure strength experiment：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 experiment：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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710234025.1A CN106838384B (en) | 2017-04-11 | 2017-04-11 | Protecting against shock swing check valve assembly method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710234025.1A CN106838384B (en) | 2017-04-11 | 2017-04-11 | Protecting against shock swing check valve assembly method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106838384A true CN106838384A (en) | 2017-06-13 |
| CN106838384B CN106838384B (en) | 2018-12-18 |
Family
ID=59147387
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710234025.1A Active CN106838384B (en) | 2017-04-11 | 2017-04-11 | Protecting against shock swing check valve assembly method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106838384B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107202183A (en) * | 2017-06-29 | 2017-09-26 | 江苏永钢集团有限公司 | A kind of buffering collision of closed type non-return valve |
| CN115464332A (en) * | 2021-06-10 | 2022-12-13 | 中核苏阀科技实业股份有限公司 | Process method for improving sealing performance of inclined flap type check valve |
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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 |
| JP2010249292A (en) * | 2009-04-20 | 2010-11-04 | Chugoku Electric Power Co Inc:The | Check valve with leak function |
| 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 |
| JP5921185B2 (en) * | 2011-12-26 | 2016-05-24 | 川崎重工業株式会社 | Swing check valve |
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2017
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Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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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 |
| JP2010249292A (en) * | 2009-04-20 | 2010-11-04 | Chugoku Electric Power Co Inc:The | Check valve with leak function |
| 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 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107202183A (en) * | 2017-06-29 | 2017-09-26 | 江苏永钢集团有限公司 | A kind of buffering collision of closed type non-return valve |
| CN107202183B (en) * | 2017-06-29 | 2019-10-29 | 江苏联峰实业有限公司 | A kind of buffering collision of closed type non-return valve |
| CN115464332A (en) * | 2021-06-10 | 2022-12-13 | 中核苏阀科技实业股份有限公司 | Process method for improving sealing performance of inclined flap type check valve |
| CN115464332B (en) * | 2021-06-10 | 2024-03-19 | 中核苏阀科技实业股份有限公司 | Technological method for improving sealing performance of inclined flap type check valve |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106838384B (en) | 2018-12-18 |
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Effective date of registration: 20181101 Address after: 224400 Jiangsu Yancheng City Funing modern service industry park Hope Road No. 99 (D) Applicant after: Valve Co., Ltd. Jiangsu high special Address before: 325113 5 Jinyuan Road, Yugen village, Yan tou Town, Yongjia, Wenzhou, Zhejiang Applicant before: Zhang Xinfeng |
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