CN208252839U - Check-valves - Google Patents
Check-valves Download PDFInfo
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- CN208252839U CN208252839U CN201820742237.0U CN201820742237U CN208252839U CN 208252839 U CN208252839 U CN 208252839U CN 201820742237 U CN201820742237 U CN 201820742237U CN 208252839 U CN208252839 U CN 208252839U
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- cavity
- butterfly plate
- valves
- check
- connecting rod
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Abstract
The utility model discloses a kind of check-valves, including to the first cavity for liquid communication and the second cavity positioned at first cavity one end, first cavity is equipped with inlet, liquid outlet and the butterfly plate being located in the liquid inlet between liquid outlet, elastic component is equipped in second cavity, the butterfly plate is equipped with pivot, the butterfly plate is pivotally connected in the first cavity by the pivot, the check-valves is additionally provided with connecting rod, described connecting rod one end is movably connected below butterfly plate pivot, the other end is to be slideably positioned in second cavity and to abut with the elastic component, the connecting rod includes to slide the isolation component for closing second cavity and the first cavity, the isolation component can move in the second cavity, the isolation component hydraulic pressure active area is less than hydraulic pressure active area of the butterfly plate towards liquid outlet, so, it can Zero flow velocity of automatic tracing is, it can be achieved that zero flow velocity of check-valves is closed.
Description
Technical field
The utility model relates to valve field more particularly to a kind of check-valves.
Background technique
Check-valves is one of many pipeline valves, it is widely used in controlling the one-way flow of liquid medium in pipeline
It is dynamic.In drainage system, conventional check valves are generally designed using tubular structure, are usually mounted at water pump liquid outlet, to prevent
Sealing stream flows backwards and causes the harm to water pump, i.e., flows and automatically turn on by medium itself, opening and closing small with cracking pressure
The features such as sensitive.
However, in the prior art, when to termination of pumping pass valve is carried out, can not eliminate termination of pumping, close the problem of valve causes water hammer.Especially
It is in special circumstances, and in relatively large water route, the problem of water hammer is easy to generate great destructive power to pipeline even electric pump.
Therefore, it is necessary to be improved to existing check-valves to overcome the defect in the prior art.
Utility model content
The purpose of this utility model is to provide it is a kind of can zero flow velocity of dynamically track check-valves.
The purpose of this utility model is achieved through the following technical solutions: a kind of check-valves, including to for liquid flow
The first logical cavity and the second cavity positioned at first cavity one end, first cavity be equipped with inlet, liquid outlet and
The butterfly plate being located in the liquid inlet between liquid outlet, second cavity is interior to be equipped with elastic component, and the butterfly plate is equipped with pivot, described
Butterfly plate is pivotally connected in the first cavity by the pivot, and the check-valves is additionally provided with connecting rod, and the activity of described connecting rod one end connects
It is connected to below butterfly plate pivot, the other end is to be slideably positioned in second cavity and to abut with the elastic component, institute
Stating connecting rod includes to slide the isolation component for closing second cavity and the first cavity, and the isolation component can be second
It is moved in cavity, the isolation component hydraulic pressure active area is less than hydraulic pressure active area of the butterfly plate towards liquid outlet.
As a further improvement of the utility model, the isolation component be in the second cavity internal sealed piston, it is described
Piston is immobilizated on the connecting rod, and the piston with the elastic component to abut.
The isolation component is the elastic membrane to close second cavity as a further improvement of the utility model,
Piece, the flexible sheet are immobilizated on connecting rod by clamping part sealing, and the connecting rod outer sheath is equipped with to described in linear orientation
The positioning region of connecting rod, the positioning region are located in first cavity.
The elastic component is held on the clamping part as a further improvement of the utility model,.
As a further improvement of the utility model, the elastic component be spring, the spring one end to it is described every
Exhausted component abuts, and the other end is equipped with the adjusting screw rod to increase or reduce amount of spring compression.
The pivot is located in the middle part of butterfly plate as a further improvement of the utility model, and is located at the top of butterfly plate center of gravity.
The pivot is located at the butterfly plate top as a further improvement of the utility model,.
Second cavity is located above the first cavity as a further improvement of the utility model,.
Chaining part, the chaining part one are equipped between the butterfly plate and connecting rod as a further improvement of the utility model,
End with connecting rod to be flexibly connected, and the other end with butterfly plate to be flexibly connected.
The butterfly plate is equipped with the link portions to liquid outlet projection, the chain as a further improvement of the utility model,
Socket part with chaining part to be flexibly connected.
Compared to the prior art, the utility model is by setting to the first cavity for liquid communication and positioned at first
Second cavity of cavity one end, first cavity are equipped with inlet, liquid outlet and are located in the liquid inlet between liquid outlet
Butterfly plate, second cavity is interior to be equipped with elastic component, and the butterfly plate is equipped with the pivot being located above butterfly plate center of gravity, and the butterfly plate passes through
The pivot is pivotally connected in the first cavity, and the check-valves is additionally provided with connecting rod, and described connecting rod one end is movably connected on butterfly plate
Below pivot, the other end is to be slideably positioned in second cavity and to abut with the elastic component, the connecting rod packet
It includes to slide the isolation component for closing second cavity and the first cavity, the isolation component can move in the second cavity
Dynamic, the isolation component hydraulic pressure active area is less than hydraulic pressure active area of the butterfly plate towards liquid outlet.So set, the butterfly plate
Can standard-sized sheet, water damage is minimum, and butterfly plate non-jitter；Can zero flow velocity of automatic tracing, it can be achieved that zero flow velocity of check-valves close.
Detailed description of the invention
Fig. 1 is the cross-sectional view of the check-valves of one embodiment of the utility model.
Cross-sectional view when Fig. 2 is the check-valves first state of Fig. 1.
Cross-sectional view when Fig. 3 is the second state of check-valves of Fig. 1.
Cross-sectional view when Fig. 4 is the check-valves third state of Fig. 1.
Cross-sectional view when Fig. 5 is four state of check-valves of Fig. 1.
Cross-sectional view when Fig. 6 is five state of check-valves of Fig. 1.
Inner section when Fig. 7 is six state of check-valves of Fig. 1.
Cross-sectional view when Fig. 8 is seven state of check-valves of Fig. 1.
Fig. 9 is the cross-sectional view of the utility model second embodiment check-valves.
Figure 10 is the cross-sectional view of the utility model third embodiment check-valves.
Appended drawing reference:
100 first cavity 1 of check-valves
11 liquid outlet 12 of inlet
2 pivot 21 of butterfly plate
22 sealing element 23 of link portions
3 chaining part 4 of connecting rod
Second cavity, 5 piston 6
7 adjusting screw rod 8 of elastic component
The intracorporal pressure P1 of first chamber of the butterfly plate towards inlet
The intracorporal pressure P2 of the first chamber for butterfly plate towards liquid outlet
It is butterfly plate to the upward thrust F1 of connecting rod
It is hydraulic pressure to piston or the thrust F2 of diaphragm
Hydrostatic head hydraulic pressure F3
Spring force G
Water (flow) direction V
200 positioning region 201 of check-valves
First cavity, 207 second cavity 202
204 clamping part 205 of diaphragm
206 connecting rod 208 of elastic component
209 check-valves 300 of butterfly plate
303 butterfly plate 306 of pivot
Specific embodiment
The various exemplary embodiments of the utility model are described in detail now with reference to attached drawing.It should also be noted that unless another
It illustrates outside, the component and the positioned opposite of step, numerical expression and numerical value otherwise illustrated in these embodiments is unlimited
The scope of the utility model processed.
Be to the description only actually of at least one exemplary embodiment below it is illustrative, never as to this is practical
Novel and its application or any restrictions used.
Technology and equipment known to person of ordinary skill in the relevant may be not discussed in detail, but in appropriate situation
Under, the technology and equipment should be considered as part of specification.
It is shown here and discuss all examples in, any occurrence should be construed as merely illustratively, without
It is as limitation.Therefore, other examples of exemplary embodiment can have different values.
It should also be noted that similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined in a attached drawing, then in subsequent attached drawing does not need that it is further discussed.
It please refers to shown in Fig. 1 to 10, the utility model is a kind of check-valves 100, including to pass through for liquid communication
First cavity 1 and the second cavity 5 positioned at 1 one end of the first cavity, first cavity 1 are equipped with inlet 11, liquid outlet 12
And it is located in the liquid inlet the butterfly plate 2 between 11 and liquid outlet 12, it is equipped with elastic component 7 in second cavity 5, the butterfly plate 2 is set
There is the pivot 21 being located above 2 center of gravity of butterfly plate, the butterfly plate 2 is pivotally connected in the first cavity 1 by the pivot 21, described
Check-valves 100 is additionally provided with connecting rod 3, and described 3 one end of connecting rod is movably connected on 2 pivot of butterfly plate, 21 lower section, and 3 other end of connecting rod is used
To be slideably positioned in second cavity 5 and to offset with the elastic component 7 in the second cavity 5, the connecting rod 3 includes using
To slide the isolation component for closing second cavity 5 and the first cavity 1, the isolation component can move in the second cavity 5
Dynamic, the isolation component hydraulic pressure active area is less than hydraulic pressure active area of the butterfly plate 2 towards liquid outlet 12.So set, described
Butterfly plate 2 can standard-sized sheet, water damage is minimum, and 2 non-jitter of butterfly plate；Can zero flow velocity of automatic tracing, it can be achieved that 100 0 flow velocity of check-valves close
It closes.Wherein, the isolation component hydraulic pressure active area is less than butterfly plate 2 and refers to towards the hydraulic pressure active area of liquid outlet 12, described
For check-valves 100 when hydraulically full, the isolation component lower surface is less than the hydraulic pressure of 2 rear side of butterfly plate by the active area of hydraulic pressure
Active area so, it is possible the hydraulic pressure for avoiding hydraulic pressure to be greater than to the active force of isolation component to 2 rear side of butterfly plate when finally closing valve
Active force, to avoid cannot achieve the case where closing valve.In the present embodiment, " the isolation component hydraulic pressure active area is small
In hydraulic pressure active area of the butterfly plate 2 towards liquid outlet 12 " refer to that the surface area of the isolation component lower surface is less than 2 rear side of butterfly plate
Surface area.Certainly, in other embodiments, the setting for completely cutting off the surface area of component lower surface and/or the rear side of butterfly plate 2 can be with
For other complicated forms, but the definition of its hydraulic pressure active area is not influenced.And " the hydraulic pressure active area " not only refers to
The attribute just having in contact liq is had on rear side of isolation component or butterfly plate 2, but representing itself just has the attribute.
Preferably, the butterfly plate 2 is swash plate butterfly structure, can do large bore valves.
It please refers to shown in Fig. 1 to 8 and Figure 10, is the utility model first embodiment check-valves 100 and third embodiment party
In formula check-valves 300, the isolation component is in 5 internal sealed piston 6 of the second cavity, and the piston 6 is immobilizated in the connecting rod 3
On, the piston 6 with the elastic component 7 to abut.In this way, the connecting rod 3 can in the second cavity 5 up and down linear movement,
And the piston 6 is to be slidingly sealed with the second cavity 5, waterpower can be made preferably to act on 6 lower surface of piston, to push
Piston 6 moves upwards and then pulls up the butterfly plate 2.
Please refer to shown in Fig. 9, be the utility model second embodiment check-valves 200 in, the isolation component for
The flexible sheet 204 of second cavity 202 is closed, the flexible sheet 204 is immobilizated in connecting rod 3 by the sealing of clamping part 205
On, 3 outer sheath of connecting rod is equipped with the positioning region 201 to connecting rod 3 described in linear orientation, and the positioning region 201 is located at described
In first cavity 207.In this way, structure is simple and easy to implement using 204 structure of diaphragm, as described in the waterpower is easier to push up
Diaphragm 204, to make the connecting rod 208 be easier to move upwards to pull up the butterfly plate 209.The linear orientation is
Refer to, the shuttle in a rectilinear direction of connecting rod 3, for example, in the present embodiment, the connecting rod 3 is in vertical side up and down
Shuttle up and down is done upwards, and will not be deviated in other directions.Certainly, in other embodiments, can also pass through
Other modes carry out limit appropriate, as long as guaranteeing that connecting rod 3 substantially can shuttle up and down.
It please join shown in Figure 10, in the third embodiment, the piston 6 is integrated setting with connecting rod 3, so set, knot
Structure is simple, and has more preferably structural stability.
Certainly, in the utility model other embodiments, the isolation component can be for except piston 6 and flexible sheet
Other other than 204 have the component of isolation sealing process.Especially in description piston 6 and the related technology of flexible sheet 204
When scheme, it can be understood as further include the mode with other isolation sealing process part replacements.
Specifically, the elastic component 206 is held on the clamping part 205.In the present embodiment, the clamping part
205 include upper and lower two parts to clamp and seal the flexible sheet 204 to 208 upper end of connecting rod, the elastic component 206
It supports on the clamping part 205, the flexible sheet 204 can be protected to be not easy to be damaged.
Work for the diaphragm type connecting rod 3 of second embodiment, in first embodiment and second embodiment
Plug connecting rod 3 overcomes the defect that diaphragm 204 is unable to pressure-bearing, to have more preferably structural stability, improves entire product
Service life.Because needing diaphragm 204 oneself when diaphragm 204 is clamped the part except portion 205 is clamped by upward hydraulic pressure
It bears, the upward hydraulic pressure can diaphragm 204 have centainly to strut degree, if upward power is excessive, be easy to appear
Diaphragm 204 struts excessive and there is a situation where rupture.
In specific embodiment of the present invention, the elastic component 7 can be spring, the spring one end to institute
It states isolation component to abut, the other end is equipped with the adjusting screw rod 8 to increase or reduce amount of spring compression.In this way, spring top is set
Adjusting screw rod 8 can adjust the matching of spring force and waterpower, realize zero flow velocity.In other implementation embodiments, or its
His flexible component or structure.
2 border of butterfly plate is equipped with sealing element 23.In this way, can make the butterfly plate 2 that there is better seal effect.
In the first, second embodiment of the utility model, the pivot 21 is respectively positioned on 2 middle part of butterfly plate, and is located at 2 weight of butterfly plate
The position of the top of the heart, in this way, due to the effect by 2 self gravity of butterfly plate downwards of butterfly plate 2, the pulling force by connecting rod 3 upwards,
When hydraulic pressure is sufficiently large, the pulling force of connecting rod 3 can overcome the influence of 2 self gravity of butterfly plate and can make 2 standard-sized sheet of butterfly plate, thus reduce because
Butterfly plate 2 can not standard-sized sheet and caused by water damage.The middle part includes but is not limited to positive middle part, as long as during non-edge part can calculate
Portion.
It is described in the utility model third embodiment, the pivot 303 is located at 306 top of butterfly plate.So set
It sets, is respectively positioned on 2 middle part of butterfly plate compared to aforementioned pivot 21, present embodiment can be reduced further because pivot 21 is located at the first cavity
The blocking formed in the middle part of in the of 1, to further decrease water damage.
In the utility model first embodiment, second cavity 5 is located at 1 top of the first cavity.In this way, convenient for connecting
Game actuation between bar 3 and gravity.Certainly, in other embodiments, second cavity 5 also can be set in the first chamber
1 other positions of body.
Specifically, being equipped with chaining part 4 between the butterfly plate 2 and connecting rod 3, described 4 one end of chaining part is to movable with connecting rod 3
Connection, the other end with butterfly plate 2 to be flexibly connected.In this way, the connecting rod 3 can do stable linear movement in the up-down direction,
To pull up the butterfly plate 2.Certainly, in other embodiments, or the connecting component of other modes.
Further, the butterfly plate 2 be equipped with to 12 projection of liquid outlet link portions 22, the link portions 22 to chain
Fitting 4 is flexibly connected.In this way, the butterfly plate 2 can be pulled up convenient for the connecting rod 3.
It please join shown in Fig. 2 to 8, be that the utility model check-valves 100 is successively cut from first state to the inside of the 7th state
Face schematic diagram.Wherein P1 is butterfly plate 2 towards the pressure in the first cavity 1 of inlet 11, and P2 is butterfly plate 2 towards liquid outlet 12
Pressure in first cavity 1, F1 are upward thrust of the butterfly plate 2 to connecting rod 3, and F2 is hydraulic pressure pushing away to piston 6 or diaphragm 204
Power, F3 are hydrostatic head hydraulic pressure, and G is spring force.
It is the utility model original state specifically, please join shown in Fig. 2, butterfly plate 2 is closed under the effect of gravity, control chamber
Spring force is zero；Start the moment of water pump, P1 is increased, and flow rate of water flow increases, and F1 increases, and F2 and P2 are zero, spring force G
It is zero.
It please join shown in Fig. 3, water pump starting, under hydraulic action, butterfly plate 2 is open certain aperture, 204 clamping part of diaphragm
205 or piston 6 uplink, spring in the case where hinged connecting rod 3 interlocks compressed；At this point, water (flow) direction is V, P1 is increased, flow velocity liter
Height, F1 reduce, and F2 and P2 are increased, and spring force G is increased.
It please join shown in Fig. 4, when water pump 11 pressure rise of inlet, diaphragm 204 or piston 6, spring are pushed down in hydraulic pressure effect
Power is pressed, and waterpower is greater than spring force, and 6 connecting rod 3 of piston pulls up butterfly plate 2, normal operating condition is now in, in hydraulic action
Under, due to the effect by 2 self gravity of butterfly plate downwards of butterfly plate 2, the pulling force by connecting rod 3 connects when hydraulic pressure is sufficiently large upwards
The pulling force of bar 3 can overcome the influence of 2 self gravity of butterfly plate and make butterfly plate 2 in 90 degree of standard-sized sheets, and 100 water of check-valves damage is minimum, and by
In the double action by gravity and pulling force simultaneously in above-below direction of butterfly plate 2, the butterfly plate 2 itself can maintain one it is more stable
The state that two power are mutually fought, when butterfly plate 2 is washed away by water flow, butterfly plate 2 itself is relatively stable, is not easy arbitrarily to swing with ripples,
I.e. butterfly plate 2 not will shake；And conventionally, as butterfly plate 2 open after be not affected by up and down direction strength limit, by
To when current scour, the strength that butterfly plate 2 fully relies on water flow is opened, and when water velocity is larger, butterfly plate 2 can be influenced with ripples
There is unstable shake, so as to influence the stability in entire water route.P1 is maximum at this time, flow speed stability, F1 zero, F2
With P2 maximum, spring force G is maximum, and F2 is much larger than G.
It please join shown in Fig. 5,6,7,8, when water pump termination of pumping, pressure is zero or even negative pressure rapidly after pump, and spring force is big at this time
In waterpower, butterfly plate 2 is closed rapidly under spring force and self gravitation effect, and water flow is not stopped under effect of inertia at this time
It is only zero, therefore waterpower and spring are in balance compared with power state, until when hydraulic zero, spring force zero, i.e. flow rate of water flow
When being zero, butterfly plate 2 is closed, to realize zero flow velocity.
Specifically, in Fig. 5, when termination of pumping, pump head zero, 100 inside water pressure of check-valves is zero at this time, piston 6 or film
Stress at piece 204 is that spring force is greater than waterpower；The fast downlink under spring force of piston 6,2 quick closedown of butterfly plate, at this time
Butterfly plate 2 from fully open position execute closing motion, waterpower start from scratch to the active force of butterfly plate 2 it is increasing, and spring discharge bullet
Power, elastic force are smaller and smaller since maximum.And because of water pump termination of pumping, water flow velocity is smaller and smaller.At this point, P1 is zero, flow velocity reduces, F1
Start from scratch increase, F2 and P2 are zero, and spring force reduces by maximum, start to discharge elastic force.
In Fig. 6, in three kinds of active forces: constantly reducing downward spring force G, flow velocity reduces and the forced area of butterfly plate 2
Ever-increasing changeable upward waterpower and 2 gravity of butterfly plate, the comprehensive function of three kinds of power, butterfly plate 2 is during the shutdown process
In dynamic equilibrium, 2 aperture of butterfly plate tracks flow velocity completely at this time.I.e. great flow velocity corresponds to the great aperture of valve.Dynamic mistake
Cheng Zhong, P1 zero, flow velocity reduce, and F1 does not increase and do not subtract, and F2 and P2 are zero, and spring force G persistently reduces, and discharge elastic force, spring
Elastic force G is equal to F1.
In Fig. 7, when flow velocity is reduced to close to zero, 2 aperture of butterfly plate is close to zero.At this point, P1 is zero, flow velocity reduces, and F1 subtracts
Small, F2 and P2 are zero, and spring force G persistently reduces release elastic force, and spring force G is equal to F1.
In Fig. 8, when water flow velocity is zero, butterfly plate 2 is completely closed, and fully achieves zero flow velocity of automatic tracing at this time.I.e. in pipe
When line flow velocity is zero, butterfly plate 2 is closed, and under back pressure effect, when 2 rear pressure of butterfly plate increases, it is long-range to act on 2 pressure of butterfly plate
In the power for acting on piston 6 or diaphragm 204, therefore butterfly plate 2 is in and stablizes closed state.At this point, P1 is zero, and flow velocity zero, F1
It is zero, F2 and P2 raising, spring force G is zero, pressure rise of the hydrostatic head F3 to butterfly plate 2.That is, the isolation component contact water
Hydraulic pressure active area when stream is less than hydraulic pressure active area of the butterfly plate 2 towards liquid outlet 12, the i.e. work in the present embodiment
The area of plug 6 or diaphragm is less than 2 area of butterfly plate, and hydraulic pressure is caused to be much larger than the pressure to piston 6 or diaphragm 204 to the pressure of butterfly plate 2
Power can keep the butterfly plate 2 to close.
Please join shown in Fig. 2 again again, when needing to reopen water pump, since the first cavity 1 at this time is before and after butterfly plate 2
It is each filled with water, the water at 2 rear of butterfly plate has certain hydraulic pressure, when restarting water pump, piston 6 or film to piston 6 or diaphragm 204 at this time
The hydraulic pressure that piece 204 can be strengthened quickly causes the butterfly plate 2 to be easier to by 3 pull-up of connecting rod, to make butterfly plate 2 in rebooting status
It is easier to open compared to original state.
Tool of the series of detailed descriptions listed above only for the feasible embodiment of the utility model
Body explanation, they are all without departing from made by the utility model skill spirit not to limit the protection scope of the utility model
Equivalent implementations or change should be included within the scope of protection of this utility model.
Claims (10)
1. a kind of check-valves, it is characterised in that: including to the first cavity for liquid communication and positioned at first cavity one end
The second cavity, first cavity be equipped with inlet, liquid outlet and the butterfly plate being located in the liquid inlet between liquid outlet, it is described
Elastic component is equipped in second cavity, the butterfly plate is equipped with pivot, and the butterfly plate is pivotally connected to the first chamber by the pivot
In vivo, the check-valves is additionally provided with connecting rod, and described connecting rod one end is movably connected below butterfly plate pivot, and the other end is set to slide
It is placed in second cavity and to be abutted with the elastic component, the connecting rod includes closing second cavity to slide
With the isolation component of the first cavity, the isolation component can move in the second cavity, the isolation component hydraulic pressure acting surface
Product is less than hydraulic pressure active area of the butterfly plate towards liquid outlet.
2. check-valves as described in claim 1, it is characterised in that: the isolation component is living in the second cavity internal sealed
Plug, the piston are immobilizated on the connecting rod, and the piston with the elastic component to abut.
3. check-valves as described in claim 1, it is characterised in that: the isolation component is to close second cavity
Flexible sheet, the flexible sheet are immobilizated on connecting rod by clamping part sealing, and the connecting rod outer sheath is equipped with to linearly fixed
The positioning region of the position connecting rod, the positioning region is located in first cavity.
4. check-valves as claimed in claim 3, it is characterised in that: the elastic component is held on the clamping part.
5. check-valves as described in claim 1, it is characterised in that: the elastic component be spring, the spring one end to
The isolation component abuts, and the other end is equipped with the adjusting screw rod to increase or reduce amount of spring compression.
6. check-valves as described in claim 1, it is characterised in that: the pivot is located in the middle part of butterfly plate and is located at butterfly plate center of gravity
Top.
7. check-valves as described in claim 1, it is characterised in that: the pivot is located at the butterfly plate top.
8. check-valves as described in claim 1, it is characterised in that: second cavity is located above the first cavity.
9. check-valves as described in claim 1, it is characterised in that: be equipped with chaining part, the chain between the butterfly plate and connecting rod
Fitting one end with connecting rod to be flexibly connected, and the other end with butterfly plate to be flexibly connected.
10. check-valves as claimed in claim 9, it is characterised in that: the butterfly plate is equipped with the link portions to liquid outlet projection,
The link portions with chaining part to be flexibly connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820742237.0U CN208252839U (en) | 2018-05-16 | 2018-05-16 | Check-valves |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820742237.0U CN208252839U (en) | 2018-05-16 | 2018-05-16 | Check-valves |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208252839U true CN208252839U (en) | 2018-12-18 |
Family
ID=66480819
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820742237.0U Active CN208252839U (en) | 2018-05-16 | 2018-05-16 | Check-valves |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108397577A (en) * | 2018-05-16 | 2018-08-14 | 安徽红星阀门有限公司 | Check-valves |
| WO2020248089A1 (en) * | 2019-06-10 | 2020-12-17 | 宁津美华工业有限公司 | Deluge alarm valve |
| CN112096930A (en) * | 2020-09-18 | 2020-12-18 | 淄博高新区成大机械设计研究所 | Straight-flow ball sealing check valve and use method thereof |
-
2018
- 2018-05-16 CN CN201820742237.0U patent/CN208252839U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108397577A (en) * | 2018-05-16 | 2018-08-14 | 安徽红星阀门有限公司 | Check-valves |
| WO2020248089A1 (en) * | 2019-06-10 | 2020-12-17 | 宁津美华工业有限公司 | Deluge alarm valve |
| CN112096930A (en) * | 2020-09-18 | 2020-12-18 | 淄博高新区成大机械设计研究所 | Straight-flow ball sealing check valve and use method thereof |
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