CN209012487U - A kind of energy saving and environment friendly check-valves of high-temperature-resistant self-cleaning low noise - Google Patents
A kind of energy saving and environment friendly check-valves of high-temperature-resistant self-cleaning low noise Download PDFInfo
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- CN209012487U CN209012487U CN201821693121.9U CN201821693121U CN209012487U CN 209012487 U CN209012487 U CN 209012487U CN 201821693121 U CN201821693121 U CN 201821693121U CN 209012487 U CN209012487 U CN 209012487U
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Abstract
A kind of energy saving and environment friendly check-valves of high-temperature-resistant self-cleaning low noise, including valve body, the two sides of valve body open up the mounting hole of lateral several uniform annular spreads respectively, valve body top surface opens up the first mounting groove of annular, the inside of first mounting groove is communicated with the inside of valve body, the bottom surface of valve deck is able to be engaged with the top surface of valve body, valve body top surface annular open up it is several be uniformly distributed the vertical first through hole of ear, valve deck top surface annular opens up several equally distributed second through-holes.Valve body is connected by staff by mounting hole with pipeline, when fluid flows into valve body through pipeline, fluid impact flap, first rocker arm moves upwards, and buffer unit can play the role of buffering to the first rocker arm, and the amplitude that first rocker arm moves upwards when avoiding the impact force of fluid excessive is excessive, to occur to hit vibration with Quick reset device, while reducing noise in check-valves, valve inner device stability is improved, can guarantee Quick reset device delay working.
Description
Technical field
The utility model belongs to valve field field, specifically a kind of energy conservation and environmental protection of high-temperature-resistant self-cleaning low noise
Type check-valves.
Background technique
Check-valves refers to be flowed and automatic open and close flap by medium itself, for the valve for preventing medium from flowing backwards, also known as
Non-return valve, check valve, reflux valve and counterbalance valve.Check-valves belongs to a kind of automatic valve, and main function is to prevent medium from falling
It flows, prevent pump and drive motor reversion and vessel media from releasing.Check-valves can also be used to rise to pressure therein
On the pipeline for providing supply to the auxiliary system for being more than system pressure.Existing swing check valve for solid-liquid two suspend it is molten
Under the various badness-media operating conditions such as liquid, liquids and gases containing long fibre or particle to the opening and closing of pipeline medium into
Row control when, flap switch close during medium in the easy each sealing surface of erosion valve of solid particle, in swing type non-return
During valve works, long fibre dress substance and particle etc. are easily stuck between each sealing surface, each sealing surface Long Term Contact corrosivity
Medium also can relatively be also easy to produce phenomena such as erosion, oxidation, decortication, incrustation, and sealing surface is caused to damage, in addition, most of check-valves are pacified
Mounted in the outlet of water pump, since the crushing of check-valves is larger, the efficiency of water pump is greatly influenced, the flap check of check-valves is closed
When, impact of water hammer influences greatly valve sealing face, and impact noise is big, under high temperature environment in use, the sealing surface meeting of check-valves
It is deformed and influences non-return sealing, therefore now design and a kind of be able to carry out self-cleaning, high-temperature resistant low-noise energy conservation and environmental protection
The crash of type is sent out.
Utility model content
The utility model provides a kind of energy saving and environment friendly check-valves of high-temperature-resistant self-cleaning low noise, to solve existing skill
The defects of art.
The utility model is achieved by the following technical programs:
A kind of energy saving and environment friendly check-valves of high-temperature-resistant self-cleaning low noise, including valve body, the two sides of valve body open up respectively
The mounting hole of lateral several uniform annular spreads, valve body top surface open up the first mounting groove of annular, the inside of the first mounting groove
It is communicated with the inside of valve body, the top surface of valve body is equipped with valve deck, and the bottom surface of valve deck is able to be engaged with the top surface of valve body, valve
Body top surface annular open up it is several be uniformly distributed the vertical first through hole of ear, valve deck top surface annular opens up several equally distributed
Two through-holes, the center of first through hole is conllinear with the center of corresponding second through-hole respectively, and screw rod, screw rod are equipped in the second through-hole
Lower end sequentially pass through corresponding first through hole respectively, the both ends difference screw thread of screw rod installs nut；The bottom surface of valve deck is equipped with control
Room processed, control room can be caught in corresponding first mounting groove, and the bottom surface of the inner wall of the first mounting groove can be with control room
Bottom surface close contacting fit, control chamber interior walls open up the second mounting groove, and the front side being equipped in the second mounting groove and rear side distinguish L-type
The first rocker arm, the long-armed angle between galianconism of the first rocker arm is α, α=90 °~95 °, the long-armed top installation of the first rocker arm
The first longitudinal stub key, the front-end and back-end of the first stub key respectively with the front side of corresponding second mounting groove inner wall and
The back side is fixedly connected, and the long-armed inside of the first rocker arm is fixedly connected before flap and the back side, and the upper end of the first rocker arm galianconism is opened
If jack, buffer unit is fixedly mounted in jack respectively, the front side of the other side on the inside of control room and rear side open up reset respectively
Quick reset device is fixedly mounted in reseting groove in slot, and cooperation is installed between buffer unit and Quick reset device；Valve interior wall
Bottom surface open up card slot, the angle between card slot inner wall two sides is γ, γ=95 °~100 °, the turning of the first rocker arm and flap
It can be caught in card slot, the two sides of card slot inner wall are able to and the long-armed side and first with flap of corresponding first rocker arm
The side close contacting fit of rocker arm galianconism.
A kind of energy saving and environment friendly check-valves of high-temperature-resistant self-cleaning low noise as described above, the buffer unit include
The lower end of buffer bar, buffer bar can be inserted into corresponding jack simultaneously respectively, and the periphery of buffer bar is wound with buffer spring, delays
The top and bottom for rushing spring are respectively fixedly connected with the bottom surface of corresponding Quick reset device and jack inner wall, and buffer spring is always
Give buffer bar one outside power.
A kind of energy saving and environment friendly check-valves of high-temperature-resistant self-cleaning low noise as described above, the Quick reset device
Including the second rocker arm, the long-armed angle between galianconism of the second rocker arm is β, β=120 °~150 °, the long-armed top of the second rocker arm
The second longitudinal stub key of end installation, the front-end and back-end of the second stub key are respectively and before corresponding control chamber interior walls
It is fixedly connected with the back side, the upper end of the second rocker arm galianconism is inserted into corresponding reseting groove, the upper end of the second rocker arm and multiple
It is fixedly connected respectively by reset spring between the top surface of position slot inner wall, the long-armed bottom surface of the second rocker arm is fixedly connected with buffer spring
Upper end.
The top surface of a kind of energy saving and environment friendly check-valves of high-temperature-resistant self-cleaning low noise as described above, the valve body is solid
The bottom surface of the sealing ring of fixed connection elasticity, the center of sealing ring is conllinear with the center of the first mounting groove, and the top surface of sealing ring can
With the bottom surface close contacting fit of valve deck.
A kind of energy saving and environment friendly check-valves of high-temperature-resistant self-cleaning low noise as described above, the periphery of the sealing ring
Maintain an equal level with the periphery of valve body top surface, sealing ring top surface annular opens up several equally distributed third through-holes, the center of third through-hole
Conllinear with the center of corresponding first through hole respectively, screw rod can be each passed through corresponding third through-hole.
A kind of energy saving and environment friendly check-valves of high-temperature-resistant self-cleaning low noise as described above, in first mounting groove
The top surface of the bottom surface of the bottom surface fixed connection and sealing circle of wall, sealing ring can be with the bottom surface close contacting fit of control room.
The utility model has the advantages that: valve body is connected by staff by mounting hole with pipeline, when fluid is through pipeline stream
When entering in valve body, fluid impact flap, the first rocker arm is moved upwards, and buffer unit can play the work of buffering to the first rocker arm
With the amplitude that first rocker arm moves upwards when avoiding the impact force of fluid excessive is excessive, to hit with Quick reset device
Vibration is hit, while reducing noise in check-valves, improves valve inner device stability, can guarantee that Quick reset device is delayed
Work, when fluid flow rate is stablized, buffer unit and Quick reset device keep the power of flap and the power of fluid impact flap
Balance, it is to form boundary layer that the surface of inclined flap and card slot can be flowed through in fluid, help dredge fluid leave flap and
Card slot forms protective effect to flap and card slot, avoids the attachment of suspended matter in fluid, helps flap surface to keep cleaning, subtract
The abrasion of the sealing position of few flap and card slot extends the service life of check-valves while improving check-valves inner sealing,
When fluid flow rate slows down, Quick reset device starting drives the first rocker arm to reset flap, Rapid reset by buffer unit
The variation that device is capable of fluid flow rate is quickly reacted, and avoiding flap closing delay from causing in valve body, there are liquid, is protected
The fluid that card flows through check-valves is fully used, and is more energy-saving and environmentally friendly, and buffer unit can be avoided flap and and the first rocker arm
Occur to hit vibration with card slot, further decreases the noise in check-valves, flap and the first rocker arm are caught in card slot, are putting height
In use, buffer unit pair Quick reset device can compensate for the relative displacement caused by deformation between flap and card slot under temperature,
Guarantee the leakproofness of sealing surface between flap and card slot, further extends the service life of check-valves.
Detailed description of the invention
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is
Some embodiments of the utility model, for those of ordinary skill in the art, in the premise of not making the creative labor property
Under, it is also possible to obtain other drawings based on these drawings.
Fig. 1 is the structural schematic diagram of the utility model.
Specific embodiment
It is practical new below in conjunction with this to keep the objectives, technical solutions, and advantages of the embodiments of the present invention clearer
Attached drawing in type embodiment, the technical scheme in the utility model embodiment is clearly and completely described, it is clear that is retouched
The embodiment stated is the utility model a part of the embodiment, instead of all the embodiments.Based on the implementation in the utility model
Example, every other embodiment obtained by those of ordinary skill in the art without making creative efforts belong to
The range of the utility model protection.
A kind of energy saving and environment friendly check-valves of high-temperature-resistant self-cleaning low noise, as shown, include valve body 1, valve body 1
Two sides open up the mounting hole 20 of lateral several uniform annular spreads respectively, and 1 top surface of valve body opens up the first mounting groove 2 of annular,
The inside of first mounting groove 2 is communicated with the inside of valve body 1, and the top surface of valve body 1 is equipped with valve deck 3, and the bottom surface of valve deck 3 is able to
Be engaged with the top surface of valve body 1,1 top surface annular of valve body open up it is several be uniformly distributed the vertical first through hole of ear, valve deck 3 pushes up
Face ring shape opens up several equally distributed second through-holes, and the center of first through hole is total with the center of corresponding second through-hole respectively
Line, screw rod 4 is equipped in the second through-hole, and the lower end of screw rod 4 sequentially passes through corresponding first through hole, the both ends point of screw rod 4 respectively
Other screw thread installs nut 5；The bottom surface of valve deck 3 is equipped with control room 6, and control room 6 can be caught in corresponding first mounting groove 2,
The bottom surface of the inner wall of first mounting groove 2 can open up the second peace with the bottom surface close contacting fit of control room 6,6 inner wall of control room
Tankage 8, the first rocker arm 9 of the front side being equipped in the second mounting groove 8 and rear side difference L-type, the first rocker arm 9 are long-armed between galianconism
Angle be α, α=9 0 °~95 °, the first longitudinal stub key 10 of the long-armed top installation of the first rocker arm 9, the first rocking bar is inserted
The front-end and back-end of pin 10 are fixedly connected with the front side of corresponding second mounting groove, 8 inner wall and the back side respectively, and the first rocker arm 9 is long
It is fixedly connected on the inside of arm before flap 12 and the back side, the upper end of 9 galianconism of the first rocker arm opens up jack 13, divide in jack 13
Not Gu Dinganzhuan buffer unit, the front side of the other side of the inside of control room 6 and rear side open up reseting groove 18 respectively, in reseting groove 18
Quick reset device is fixedly mounted, cooperation is installed between buffer unit and Quick reset device；It opens the bottom surface of 1 inner wall of valve body
If card slot 21, the angle between 21 inner wall two sides of card slot is γ, γ=95 °~100 °, 12 energy of turning and flap of the first rocker arm 9
It is enough caught in card slot 21, the two sides of 21 inner wall of card slot are able to and the long-armed side with flap 12 of corresponding first rocker arm 9
With the side close contacting fit of 9 galianconism of the first rocker arm.Valve body 1 is connected by staff by mounting hole 20 with pipeline, works as stream
When body is flowed into valve body 1 through pipeline, fluid impact flap 12, the first rocker arm 9 is moved upwards, and buffer unit can shake to first
Arm 9 plays the role of buffering, and the amplitude that first rocker arm 9 moves upwards when avoiding the impact force of fluid excessive is excessive, thus with fast
Fast resetting apparatus occurs to hit vibration, while reducing noise in check-valves, improves 1 interior arrangement stability of valve body, Neng Goubao
Demonstrate,prove Quick reset device delay working, when fluid flow rate is stablized, buffer unit and Quick reset device to the power of flap 12 with
The power of fluid impact flap 12 keeps balancing, and it is to form side that the surface of inclined flap 12 and card slot 21 can be flowed through in fluid
Interlayer, help dredge fluid and leave flap 12 and card slot 21, form protective effect to flap 12 and card slot 21, avoid hanging in fluid
The attachment of floating object helps 12 surface of flap to keep cleaning, reduces the abrasion of the sealing position of flap 12 and card slot 21, improves non-return
The service life for extending check-valves while valve inner sealing, when fluid flow rate slows down, Quick reset device starting passes through
Buffer unit drives the first rocker arm 9 to reset flap 12, and the variation that Quick reset device is capable of fluid flow rate carries out quick
Reaction, avoiding flap 12 from closing delay causes to guarantee that the fluid for flowing through check-valves is fully used there are liquid in valve body 1,
It is more energy-saving and environmentally friendly, buffer unit can be avoided flap 12 and shock occurs with card slot 21 and shakes with the first rocker arm 9, further
The noise in check-valves is reduced, flap 12 and the first rocker arm 9 are caught in card slot 21, in the case where putting high temperature in use, buffer unit
Secondary Quick reset device can compensate for the relative displacement caused by deformation between flap 12 and card slot 21, guarantee flap 12 and card
The leakproofness of sealing surface between slot 21 further extends the service life of check-valves.
Specifically, in order to improve the stability of 1 interior arrangement of valve body, buffer unit described in the present embodiment includes buffering
The lower end of bar 14, buffer bar 14 can be inserted into corresponding jack 13 simultaneously respectively, and the periphery of buffer bar 14 is wound with buffering elastic
Spring 17, the top and bottom of buffer spring 17 are respectively fixedly connected with the bottom surface of 13 inner wall of corresponding Quick reset device and jack,
Buffer spring 17 gives 14 1 outside power of buffer bar always.When liquid flows in pipeline, buffer bar 14 is inserted into jack
In 13,17 forced compression of buffer spring, Quick reset device delayed startup, can be avoided liquid flowing impact force it is larger when,
The motion amplitude of first rocker arm 9 is larger to be caused to impact to Quick reset device, to improve the stability of 1 interior arrangement of valve body.
Specifically, in order to improve the stability inside Quick reset device, Quick reset device packet described in the present embodiment
Include the second rocker arm 15, the long-armed angle between galianconism of the second rocker arm 15 is β, β=120 °~150 °, the second rocker arm 15 it is long-armed
Longitudinal the second stub key 16 of top installation, the front-end and back-end of the second stub key 16 respectively with corresponding control room 6
It being fixedly connected before inner wall with the back side, the upper end of 15 galianconism of the second rocker arm is inserted into corresponding reseting groove 18, and second
It is fixedly connected respectively by reset spring 19 between the top surface of 18 inner wall of upper end and reseting groove of rocker arm 15, the second rocker arm 15 is long-armed
Bottom surface be fixedly connected with the upper end of buffer spring 17.The power of buffer bar 14 transports the galianconism of the second rocker arm 15 in reseting groove 18
Dynamic, 19 forced compression of reset spring, when Quick reset device starting, reset spring 19 pushes the galianconism of the second rocker arm 15 reversed
Power acts on buffer bar 14, and the second rocker arm 15 is moved around the second stub key 16 always, can guarantee that the second rocker arm 15 moves rail
The stability of mark, and then improve the reliability of Quick reset device.
Further, in order to increase the leakproofness that valve deck 3 is installed, the top surface of valve body 1 described in the present embodiment is fixedly connected
The bottom surface of the sealing ring 11 of elasticity, the center of sealing ring 11 is conllinear with the center of the first mounting groove 2, the top surface energy of sealing ring 11
Enough and valve deck 3 bottom surface close contacting fit.Sealing ring 11 can increase the leakproofness installed between valve body 1 and valve deck 3, sealing
When the elasticity of ring 11 can be avoided the installation tension of nut 5, extruding is generated between valve body 1 and valve deck 3, between valve body 1 and valve deck 3
Contact surface play a protective role.
Further, in order to guarantee the sealing effect of sealing ring 11, the periphery of sealing ring 11 described in the present embodiment with
The periphery of 1 top surface of valve body maintains an equal level, and 11 top surface annular of sealing ring opens up several equally distributed third through-holes, the center of third through-hole
Conllinear with the center of corresponding first through hole respectively, screw rod 4 can be each passed through corresponding third through-hole.The periphery of sealing ring 11
Maintain an equal level when can guarantee that staff tightens nut 5 with the periphery of 1 top surface of valve body, the contact surface between valve deck 3 and valve body 1 by
Power is uniform, to be further ensured that the sealing effect of sealing ring 11.
Further, in order to improve the closure inside valve body 1,2 inner wall of the first mounting groove described in the present embodiment
The top surface of the bottom surface of bottom surface fixed connection and sealing circle 7, sealing ring 7 can be with the bottom surface close contacting fit of control room 6.Check-valves
In the process of work, fluid can cause to impact to the inner wall of valve body 1, and sealing ring 7 can be avoided between control room 6 and valve body 1
There are gaps, and then guarantee the closure inside valve body 1.
Finally, it should be noted that above embodiments are only to illustrate the technical solution of the utility model, rather than its limitations；
Although the utility model is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that:
It is still possible to modify the technical solutions described in the foregoing embodiments, or part of technical characteristic is carried out etc.
With replacement；And these are modified or replaceed, various embodiments of the utility model technology that it does not separate the essence of the corresponding technical solution
The spirit and scope of scheme.
Claims (6)
1. a kind of energy saving and environment friendly check-valves of high-temperature-resistant self-cleaning low noise, it is characterised in that: including valve body (1), valve body (1)
Two sides open up the mounting holes (20) of lateral several uniform annular spreads respectively, valve body (1) top surface opens up the first peace of annular
The inside of tankage (2), the first mounting groove (2) is communicated with the inside of valve body (1), and the top surface of valve body (1) is equipped with valve deck (3), valve deck
(3) bottom surface is able to be engaged with the top surface of valve body (1), and valve body (1) top surface annular, which opens up, several is uniformly distributed ear
Vertical first through hole, valve deck (3) top surface annular open up several equally distributed second through-holes, the center of first through hole respectively with
The center of corresponding second through-hole is conllinear, is equipped in the second through-hole screw rod (4), and the lower end of screw rod (4) sequentially passes through pair respectively
The first through hole answered, both ends difference screw thread installation nut (5) of screw rod (4)；The bottom surface of valve deck (3) is equipped with control room (6), control
Room (6) can be caught in corresponding first mounting groove (2), and the bottom surface of the inner wall of the first mounting groove (2) can be with control room (6)
Bottom surface close contacting fit, control room (6) inner wall opens up the second mounting groove (8), the front side that is equipped in the second mounting groove (8) and
Rear side distinguishes the first rocker arm (9) of L-type, and the long-armed angle between galianconism of the first rocker arm (9) is α, α=90 °~95 °, and first
Longitudinal the first stub key (10) of the long-armed top installation of rocker arm (9), the front-end and back-end difference of the first stub key (10)
It is fixedly connected with the front side of corresponding second mounting groove (8) inner wall and the back side, the long-armed inside of the first rocker arm (9) is fixedly connected with valve
The upper end at before valve (12) and the back side, the first rocker arm (9) galianconism opens up jack (13), is fixedly mounted respectively in jack (13) slow
Flushing device, the front side of the other side on the inside of control room (6) and rear side open up reseting groove (18) respectively, fixed in reseting groove (18)
Quick reset device is installed, cooperation is installed between buffer unit and Quick reset device；The bottom surface of valve body (1) inner wall opens up card slot
(21), the angle between card slot (21) inner wall two sides is γ, γ=95 °~100 °, the turning of the first rocker arm (9) and flap (12)
It can be caught in in card slot (21), the two sides of card slot (21) inner wall are able to and corresponding first rocker arm (9) is long-armed and flap
(12) the side close contacting fit of side and the first rocker arm (9) galianconism.
2. a kind of energy saving and environment friendly check-valves of high-temperature-resistant self-cleaning low noise according to claim 1, it is characterised in that:
The buffer unit includes buffer bar (14), and the lower end of buffer bar (14) can be inserted into corresponding jack (13) simultaneously respectively
Interior, the periphery of buffer bar (14) is wound with buffer spring (17), and the top and bottom of buffer spring (17) are respectively fixedly connected with correspondence
Quick reset device and jack (13) inner wall bottom surface, buffer spring (17) always give (14) outside power of buffer bar.
3. a kind of energy saving and environment friendly check-valves of high-temperature-resistant self-cleaning low noise according to claim 1 or 2, feature exist
It include the second rocker arm (15) in: the Quick reset device, the long-armed angle between galianconism of the second rocker arm (15) is β, β=
120 °~150 °, longitudinal the second stub key (16) of the long-armed top installation of the second rocker arm (15), the second stub key
(16) front-end and back-end are fixedly connected with before corresponding control room (6) inner wall and back side respectively, and the second rocker arm (15) is short
The upper end of arm is inserted into corresponding reseting groove (18), the upper end of the second rocker arm (15) and the top surface of reseting groove (18) inner wall
Between be fixedly connected respectively by reset spring (19), the long-armed bottom surface of the second rocker arm (15) is fixedly connected with buffer spring (17)
Upper end.
4. a kind of energy saving and environment friendly check-valves of high-temperature-resistant self-cleaning low noise according to claim 1, it is characterised in that:
The top surface of the valve body (1) is fixedly connected with the bottom surface of the sealing ring (11) of elasticity, the center of sealing ring (11) and the first installation
The center of slot (2) is conllinear, and the top surface of sealing ring (11) can be with the bottom surface close contacting fit of valve deck (3).
5. a kind of energy saving and environment friendly check-valves of high-temperature-resistant self-cleaning low noise according to claim 4, it is characterised in that:
The periphery of the sealing ring (11) and the periphery of valve body (1) top surface maintain an equal level, and sealing ring (11) top surface annular opens up several uniform
The third through-hole of distribution, the center of third through-hole is conllinear with the center of corresponding first through hole respectively, and screw rod (4) can be worn respectively
Cross corresponding third through-hole.
6. a kind of energy saving and environment friendly check-valves of high-temperature-resistant self-cleaning low noise according to claim 1, it is characterised in that:
The bottom surface of the bottom surface fixed connection and sealing circle (7) of described the first mounting groove (2) inner wall, the top surface of sealing ring (7) can be with control
The bottom surface close contacting fit of room (6) processed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821693121.9U CN209012487U (en) | 2018-10-18 | 2018-10-18 | A kind of energy saving and environment friendly check-valves of high-temperature-resistant self-cleaning low noise |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821693121.9U CN209012487U (en) | 2018-10-18 | 2018-10-18 | A kind of energy saving and environment friendly check-valves of high-temperature-resistant self-cleaning low noise |
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| Publication Number | Publication Date |
|---|---|
| CN209012487U true CN209012487U (en) | 2019-06-21 |
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ID=66839141
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821693121.9U Active CN209012487U (en) | 2018-10-18 | 2018-10-18 | A kind of energy saving and environment friendly check-valves of high-temperature-resistant self-cleaning low noise |
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| CN (1) | CN209012487U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113898766A (en) * | 2021-09-09 | 2022-01-07 | 精工阀门集团有限公司 | Check valve with buffering pressure relief mechanism |
-
2018
- 2018-10-18 CN CN201821693121.9U patent/CN209012487U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113898766A (en) * | 2021-09-09 | 2022-01-07 | 精工阀门集团有限公司 | Check valve with buffering pressure relief mechanism |
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