CN108167523A - A kind of slowly closed silencing check valve with built-in damping system - Google Patents
A kind of slowly closed silencing check valve with built-in damping system Download PDFInfo
- Publication number
- CN108167523A CN108167523A CN201810060749.3A CN201810060749A CN108167523A CN 108167523 A CN108167523 A CN 108167523A CN 201810060749 A CN201810060749 A CN 201810060749A CN 108167523 A CN108167523 A CN 108167523A
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- CN
- China
- Prior art keywords
- valve
- valve plate
- damping
- built
- cavity
- 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.)
- Granted
Links
- 238000013016 damping Methods 0.000 title claims abstract description 78
- 230000030279 gene silencing Effects 0.000 title claims abstract description 26
- 238000007789 sealing Methods 0.000 claims description 15
- 238000012856 packing Methods 0.000 claims description 5
- 230000003139 buffering effect Effects 0.000 abstract description 7
- 238000000034 method Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000686 essence Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
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
- F16K47/00—Means in valves for absorbing fluid energy
- F16K47/04—Means in valves for absorbing fluid energy for decreasing pressure or noise level, the throttle being incorporated in the closure member
-
- 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
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
- F16K1/34—Cutting-off parts, e.g. valve members, seats
- F16K1/36—Valve members
-
- 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
- F16K15/025—Check valves with guided rigid valve members the valve being loaded by a spring
-
- 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
- F16K47/00—Means in valves for absorbing fluid energy
- F16K47/02—Means in valves for absorbing fluid energy for preventing water-hammer or noise
- F16K47/023—Means in valves for absorbing fluid energy for preventing water-hammer or noise for preventing water-hammer, e.g. damping of the valve movement
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Check Valves (AREA)
- Details Of Valves (AREA)
Abstract
The present invention provides a kind of slowly closed silencing check valves with built-in damping system, including valve body, valve plate is by being fixed in the valve seat of valve body side inner cavity is placed in, locating rod is equipped in valve body, locating rod is provided with cavity along axis, the other end of locating rod is slidably connected damping piston, the outer wall of locating rod is equipped with valve plate spring, the one end of damping piston far from resetting spring is provided with deep hole, the position side wall of corresponding deep hole is provided with the medium escape orifice of right-angled intersection, and the side that damping piston is contacted with resetting spring is provided with the storage discharge orifice connected with deep hole in the axial direction.A kind of slowly closed silencing check valve with built-in damping system of the present invention, pass through the cooperation of simple structure, and the mutual adjusting of a series of damped motion of piston, realize the damping of valve plate closing movement, ensure that valve Slow Close is eliminated the noise, noise is reduced, buffering effect is preferable, improves the service life of valve.
Description
Technical field
The invention belongs to valve field, more particularly, to a kind of slowly closed silencing check valve with built-in damping system.
Background technology
Damping check valve refers to flow in itself by medium and automatic open and close flap, for preventing the valve of medium refluence,
Also known as non-return valve, check valve, damping check valve reflux valve and counterbalance valve, check-valves belong to a kind of automatic valve, main function
It is to prevent medium from flowing backwards, prevent pump and drive motor reversion and vessel media from releasing, check-valves can be additionally used in wherein
Pressure may be raised above system pressure auxiliary system provide supply pipeline on, check-valves can be divided mainly into swing type non-return
Valve (being rotated according to center of gravity) and lift check valve (being moved along axis), but existing check-valves kinetic stability is poor, eliminates the noise
Effect is bad, and for such situation, the present invention proposes a kind of slowly closed silencing check valve with built-in damping system, passes through letter
The damping of valve plate closing movement is realized in the mutual adjusting of cooperation and a series of damped motion of piston of single structure, is ensured
Valve Slow Close is eliminated the noise, and reduces noise, buffering effect is preferable, improves the service life of valve.
Invention content
In view of this, the present invention is directed to propose a kind of slowly closed silencing check valve with built-in damping system, by simple
Structure cooperation and a series of damped motion of piston mutual adjusting, realize valve plate closing movement damping, ensure valve
Door Slow Close is eliminated the noise, and reduces noise, buffering effect is preferable, improves the service life of valve.
In order to achieve the above objectives, the technical proposal of the invention is realized in this way：
A kind of slowly closed silencing check valve with built-in damping system, including valve body, the body cavity middle section is
The spherical cavity outwardly protruded, one end slidably connects valve plate in the valve body, and the valve plate is by being fixed on the valve body one
The valve seat of side inner cavity is placed in the spherical cavity, and locating rod is equipped in the valve body, and the locating rod is provided with cavity along axis,
The valve plate is placed in the cavity and is slidably connected with it, and the other end of the locating rod is slidably connected damping piston, the resistance
The one end of Buddhist nun's piston far from the valve plate is connect by resetting spring with the valve body slides, and the outer wall of the locating rod is equipped with valve
Flat spring, the other end of the valve plate spring are connect with the valve plate, the one end of the damping piston far from the resetting spring
Deep hole is provided with, the position side wall of the corresponding deep hole is provided with the medium escape orifice of right-angled intersection, and the medium escape orifice, which is placed in, to be leaned on
One end of the nearly resetting spring, the side that the damping piston is contacted with the resetting spring be provided in the axial direction with it is described
The storage discharge orifice of deep hole connection.
Further, the valve plate includes being integrally formed the choked flow valve plate for being mutually perpendicular to place and limiting valve shaft, the limit
Position valve shaft is placed in the cavity passes through the intermediate lock chamber of the valve seat to be slidably connected with it with its clearance fit, the other end.
Further, the choked flow valve plate is placed in the spherical cavity, and its maximum gauge is less than equipped with the valve seat
The diameter of the body cavity of side, the minimum diameter of the choked flow valve plate are more than the internal diameter of the valve seat.
Further, the part that side of the choked flow valve plate far from the damping piston is contacted with the valve seat is equipped with valve
Plate sealing ring, the side wall that the limiting valve shaft is contacted with the cavity are equipped with valve plate piston packing, and the locating rod is close to institute
The luminal border for stating resetting spring side is equipped with damping piston keying mouth sealing ring, the contact between the valve body and the valve seat
Part is equipped with sealing ring.
Further, the one end of the valve body far from the valve seat is detachably connected pressing spring silk cap by stent, described
It is the resetting spring between pressing spring silk cap and the damping piston.
Further, damping piston sealing ring is equipped at the cooperation between the damping piston and the cavity.
Further, the axis weight of the pressing spring silk cap, the cavity, the resetting spring and the limiting valve shaft
It closes.
Further, the Minimum sliding distance of the choked flow valve plate, which is less than, is more than the medium escape orifice to the locating rod
Maximum distance close to the resetting spring end.
Further, the diameter of the medium escape orifice is more than the diameter for storing discharge orifice, and the axis of the two mutually hangs down
Directly.
Relative to the prior art, a kind of slowly closed silencing check valve with built-in damping system of the present invention have with
Lower advantage：
(1) a kind of slowly closed silencing check valve with built-in damping system of the present invention, passes through simple structure
Cooperation and the mutual adjusting of a series of damped motion of piston, realize the damping of valve plate closing movement, ensure that valve Slow Close disappears
Sound reduces noise, and buffering effect is preferable, improves the service life of valve.
(2) a kind of slowly closed silencing check valve with built-in damping system of the present invention, passes through the phase of damping system
The Slow Close to valve is realized in cooperation between mutually, and stability is preferable, and cooperation is closer, improves the effect of Slow Close.
(3) a kind of slowly closed silencing check valve with built-in damping system of the present invention, during valve opening,
The medium that damping piston is pushed by valve plate piston extrudes, and damping piston medium escape orifice is opened, and makes valve plate piston and damping piston
Between medium release rapidly, to realize that valve plate can be opened rapidly, the elastic force that the valve plate opening process later stage is become larger by spring is real
Existing valve plate opens buffering, and in valve closing process, damping piston is damped piston reset spring and pushes and close, and medium flows through
Damping piston stores discharge orifice, and current limliting is flowed into the space between valve plate piston and damping piston, to realize valve plate closing movement
Damping ensures that valve Slow Close is eliminated the noise.
Description of the drawings
The attached drawing for forming the part of the present invention is used to provide further understanding of the present invention, schematic reality of the invention
Example and its explanation are applied for explaining the present invention, is not constituted improper limitations of the present invention.In the accompanying drawings：
Fig. 1 is a kind of whole knot in slowly closed silencing check valve outside with built-in damping system described in the embodiment of the present invention
Structure schematic diagram；
Inside when Fig. 2 is opened for a kind of slowly closed silencing check valve with built-in damping system described in the embodiment of the present invention
Sectional view；
Inside when Fig. 3 is closed for a kind of slowly closed silencing check valve with built-in damping system described in the embodiment of the present invention
Sectional view；
Fig. 4 is a kind of slowly closed silencing check valve partial enlargement with built-in damping system described in the embodiment of the present invention
Figure.
Reference sign：
1- valve bodies；2- valve seats；3- valve plates；4- valve plate springs；5- sealing rings；6- valve plate sealing rings；7- damping pistons；8- hinders
Buddhist nun's piston packing；9- valve plate piston packings；10- medium escape orifices；11- damping piston Open-close sealing circles；12- resets bullet
Spring；13- stores discharge orifice；14- pressing spring silk caps；15- stents；16- locating rods；301- choked flow valve plates；302- limits valve shaft；701- is deep
Hole；1601- cavities.
Specific embodiment
It should be noted that in the absence of conflict, the feature in embodiment and embodiment in the present invention can phase
Mutually combination.
In the description of the present invention, it is to be understood that term " " center ", " longitudinal direction ", " transverse direction ", " on ", " under ",
The orientation or position relationship of the instructions such as "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom ", " interior ", " outer " are
Based on orientation shown in the drawings or position relationship, it is for only for ease of the description present invention and simplifies description rather than instruction or dark
Show that signified device or element there must be specific orientation, with specific azimuth configuration and operation, therefore it is not intended that right
The limitation of the present invention.In addition, term " first ", " second " etc. are only used for description purpose, and it is not intended that instruction or hint phase
To importance or the implicit quantity for indicating indicated technical characteristic.The feature for defining " first ", " second " etc. as a result, can
To express or implicitly include one or more this feature.In the description of the present invention, unless otherwise indicated, " multiple "
It is meant that two or more.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected or be integrally connected；It can
To be mechanical connection or be electrically connected；It can be directly connected, can also be indirectly connected by intermediary, Ke Yishi
Connection inside two elements.For the ordinary skill in the art, above-mentioned term can be understood by concrete condition
Concrete meaning in the present invention.
The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.
A kind of slowly closed silencing check valve with built-in damping system as shown in Figure 1, including valve body 1,1 inner cavity of valve body
Middle section is the spherical cavity outwardly protruded, and one end slidably connects valve plate 3 in the valve body 1, and the valve plate 3 passes through fixation
Valve seat 2 in the 1 side inner cavity of valve body is placed in the spherical cavity, and locating rod 16, the positioning are equipped in the valve body 1
Bar 16 is provided with cavity 1601 along axis, and the valve plate 3 is placed in the cavity 1601 and is slidably connected with it, the locating rod 16
The other end is slidably connected damping piston 7, the one end of the damping piston 7 far from the valve plate 3 by resetting spring 12 with it is described
Valve body 1 is slidably connected, and the outer wall of the locating rod 16 is equipped with valve plate spring 4, the other end and the valve plate of the valve plate spring 4
3 connections, the one end of the damping piston 7 far from the resetting spring 12 are provided with deep hole 701, the position of the corresponding deep hole 701
Side wall is provided with the medium escape orifice 10 of right-angled intersection, and the medium escape orifice 10 is disposed adjacent to one end of the resetting spring 12,
The damping piston 7 is provided with the storage stream connected with the deep hole 701 in the axial direction with the side that the resetting spring 12 contacts
Hole 13 by the cooperation of simple structure and the mutual adjusting of a series of damped motion of piston, realizes that valve plate 3 closes fortune
Dynamic damping ensures that valve Slow Close is eliminated the noise, reduces noise, and buffering effect is preferable, improves the service life of valve, is by damping
The Slow Close to valve is realized in the mutual cooperation of system, and stability is preferable, and cooperation is closer, improves the effect of Slow Close.
Wherein, the valve plate 3 includes being integrally formed the choked flow valve plate 301 for being mutually perpendicular to place and limiting valve shaft 302, described
Limiting valve shaft 302 be placed in the cavity 1601 with its clearance fit, the other end pass through the valve seat 2 intermediate lock chamber and its
It is slidably connected.
Wherein, the choked flow valve plate 301 is placed in the spherical cavity, and its maximum gauge is less than equipped with the valve seat 2
The diameter of 1 inner cavity of the valve body of side, the minimum diameter of the choked flow valve plate 301 are more than the internal diameter of the valve seat 2.
Wherein, side of the choked flow valve plate 301 far from the damping piston 7 is equipped with the part that the valve seat 2 contacts
Valve plate sealing ring 6, the side wall that the limiting valve shaft 302 is contacted with the cavity 1601 is equipped with valve plate piston packing 9, described fixed
Luminal border of the position bar 16 close to 12 side of resetting spring is equipped with damping piston and opens and closes mouth sealing ring 11,1 He of valve body
Contact portion between the valve seat 2 is equipped with sealing ring 5.
Wherein, the one end of the valve body 1 far from the valve seat 2 is detachably connected pressing spring silk cap 14, institute by stent 15
State between pressing spring silk cap 14 and the damping piston 7 is the resetting spring 12.
Wherein, damping piston sealing ring 8 is equipped at the cooperation between the damping piston 7 and the cavity 1601.
Wherein, the pressing spring silk cap 14, the cavity 1601, the resetting spring 12 and the limiting valve shaft 302
Axis overlaps.
Wherein, the Minimum sliding distance of the choked flow valve plate 301, which is less than, is more than the medium escape orifice 10 to the positioning
Bar 16 is close to the maximum distance at 12 end of resetting spring.
Wherein, the diameter of the medium escape orifice 10 is more than the diameter for storing discharge orifice 13, and the axis of the two mutually hangs down
Directly.
The specific embodiment of the present invention：During valve opening, damping piston 7 is limited Jie of the promotion of valve shaft 302
Matter extrudes, and 7 medium escape orifice 10 of damping piston is opened, and the medium between limiting valve shaft 302 and damping piston 7 is made to release rapidly, with
Realize that valve plate 3 can be opened rapidly, the elastic force that the 3 opening process later stage of valve plate is become larger by spring realizes that valve plate 3 opens buffering,
In valve closing process, the spring 12 that is reset of damping piston 7 is pushed and is closed, and medium, which flows through, stores discharge orifice 13, and current limliting flows into limiting
In space between valve shaft 302 and damping piston 7, to realize the damping of 3 closing movement of valve plate, ensure that valve Slow Close is eliminated the noise.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
With within principle, any modification, equivalent replacement, improvement and so on should all be included in the protection scope of the present invention god.
Claims (9)
1. a kind of slowly closed silencing check valve with built-in damping system, it is characterised in that：Including valve body, in the body cavity
Between be partly the spherical cavity that outwardly protrudes, one end slidably connects valve plate in the valve body, and the valve plate is by being fixed on
The valve seat for stating valve body side inner cavity is placed in the spherical cavity, is equipped with locating rod in the valve body, and the locating rod is along axis
Cavity is provided with, the valve plate is placed in the cavity and is slidably connected with it, and the other end of the locating rod is slidably connected to damp and live
Plug, the one end of the damping piston far from the valve plate are connect by resetting spring with the valve body slides, the locating rod
Outer wall is equipped with valve plate spring, and the other end of the valve plate spring is connect with the valve plate, and the damping piston is far from the reset
One end of spring is provided with deep hole, and the position side wall of the corresponding deep hole is provided with the medium escape orifice of right-angled intersection, and the medium is let out
Discharge hole is disposed adjacent to one end of the resetting spring, and the side that the damping piston is contacted with the resetting spring is in the axial direction
It is provided with the storage discharge orifice connected with the deep hole.
2. a kind of slowly closed silencing check valve with built-in damping system according to claim 1, it is characterised in that：It is described
Valve plate includes being integrally formed the choked flow valve plate for being mutually perpendicular to place and limiting valve shaft, the limiting valve shaft be placed in the cavity with
Its clearance fit, the other end pass through the intermediate lock chamber of the valve seat to be slidably connected with it.
3. a kind of slowly closed silencing check valve with built-in damping system according to claim 2, it is characterised in that：It is described
Choked flow valve plate is placed in the spherical cavity, and its maximum gauge is less than the straight of the body cavity equipped with the valve seat side
Diameter, the minimum diameter of the choked flow valve plate are more than the internal diameter of the valve seat.
4. a kind of slowly closed silencing check valve with built-in damping system according to claim 3, it is characterised in that：It is described
The part that side of the choked flow valve plate far from the damping piston is contacted with the valve seat is equipped with valve plate sealing ring, the limiting valve shaft
The side wall contacted with the cavity is equipped with valve plate piston packing, and the locating rod is close to the inner cavity side of the resetting spring side
Edge is equipped with damping piston and opens and closes mouth sealing ring, and the contact portion between the valve body and the valve seat is equipped with sealing ring.
5. a kind of slowly closed silencing check valve with built-in damping system according to claim 4, it is characterised in that：It is described
The one end of valve body far from the valve seat is detachably connected pressing spring silk cap by stent, and the pressing spring silk cap and the damping are lived
It is the resetting spring between plug.
6. a kind of slowly closed silencing check valve with built-in damping system according to claim 5, it is characterised in that：It is described
Damping piston sealing ring is equipped at cooperation between damping piston and the cavity.
7. a kind of slowly closed silencing check valve with built-in damping system according to claim 6, it is characterised in that：It is described
Pressing spring silk cap, the cavity, the resetting spring and the axis for limiting valve shaft overlap.
8. a kind of slowly closed silencing check valve with built-in damping system according to claim 7, it is characterised in that：It is described
The Minimum sliding distance of choked flow valve plate, which is less than, is more than the medium escape orifice to the locating rod close to the resetting spring end
Maximum distance.
9. a kind of slowly closed silencing check valve with built-in damping system according to claim 8, it is characterised in that：It is described
The diameter of medium escape orifice is more than the diameter for storing discharge orifice, and the axis of the two is mutually perpendicular to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810060749.3A CN108167523B (en) | 2018-01-22 | 2018-01-22 | Silencing slow-closing check valve with built-in damping system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810060749.3A CN108167523B (en) | 2018-01-22 | 2018-01-22 | Silencing slow-closing check valve with built-in damping system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108167523A true CN108167523A (en) | 2018-06-15 |
| CN108167523B CN108167523B (en) | 2023-10-31 |
Family
ID=62515203
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810060749.3A Active CN108167523B (en) | 2018-01-22 | 2018-01-22 | Silencing slow-closing check valve with built-in damping system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108167523B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112066048A (en) * | 2020-09-16 | 2020-12-11 | 邵玉强 | Slow-closing check valve |
| CN112483688A (en) * | 2020-11-19 | 2021-03-12 | 浙江上风高科专风实业股份有限公司 | Novel sleeve muffler with check valve |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2088626U (en) * | 1991-05-14 | 1991-11-13 | 敖启文 | Sound self-damping check valve |
| EP0596768A1 (en) * | 1992-11-02 | 1994-05-11 | GIAT Industries | Pressurized fluid-flow control valve for passage between two inlet and outlet conduits |
| CN103277543A (en) * | 2013-05-31 | 2013-09-04 | 辽阳通德给水设备制造有限公司 | Elevating type hydraulic slow-closure silencing check valve |
| CN203384430U (en) * | 2013-07-24 | 2014-01-08 | 上海亚核阀业成套有限公司 | Slow-closing lift check valve |
| CN103836237A (en) * | 2012-11-23 | 2014-06-04 | 凯泰阀门(集团)有限公司 | Shuttle-shaped adjustable check valve |
| CN207848584U (en) * | 2018-01-22 | 2018-09-11 | 博纳斯威阀门股份有限公司 | A kind of slowly closed silencing check valve with built-in damping system |
-
2018
- 2018-01-22 CN CN201810060749.3A patent/CN108167523B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2088626U (en) * | 1991-05-14 | 1991-11-13 | 敖启文 | Sound self-damping check valve |
| EP0596768A1 (en) * | 1992-11-02 | 1994-05-11 | GIAT Industries | Pressurized fluid-flow control valve for passage between two inlet and outlet conduits |
| CN103836237A (en) * | 2012-11-23 | 2014-06-04 | 凯泰阀门(集团)有限公司 | Shuttle-shaped adjustable check valve |
| CN103277543A (en) * | 2013-05-31 | 2013-09-04 | 辽阳通德给水设备制造有限公司 | Elevating type hydraulic slow-closure silencing check valve |
| CN203384430U (en) * | 2013-07-24 | 2014-01-08 | 上海亚核阀业成套有限公司 | Slow-closing lift check valve |
| CN207848584U (en) * | 2018-01-22 | 2018-09-11 | 博纳斯威阀门股份有限公司 | A kind of slowly closed silencing check valve with built-in damping system |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112066048A (en) * | 2020-09-16 | 2020-12-11 | 邵玉强 | Slow-closing check valve |
| CN112483688A (en) * | 2020-11-19 | 2021-03-12 | 浙江上风高科专风实业股份有限公司 | Novel sleeve muffler with check valve |
| CN112483688B (en) * | 2020-11-19 | 2022-08-09 | 浙江上风高科专风实业股份有限公司 | Novel sleeve muffler with check valve |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108167523B (en) | 2023-10-31 |
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