CN110453651A - A kind of butterfly valve type flap valve and its application method for reversible passage - Google Patents
A kind of butterfly valve type flap valve and its application method for reversible passage Download PDFInfo
- Publication number
- CN110453651A CN110453651A CN201910853410.3A CN201910853410A CN110453651A CN 110453651 A CN110453651 A CN 110453651A CN 201910853410 A CN201910853410 A CN 201910853410A CN 110453651 A CN110453651 A CN 110453651A
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- Prior art keywords
- flap valve
- baffle
- reversible passage
- passage
- reversible
- Prior art date
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- 230000002441 reversible effect Effects 0.000 title claims abstract description 91
- 238000000034 method Methods 0.000 title claims abstract description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 101
- 230000002411 adverse Effects 0.000 claims description 7
- 238000007789 sealing Methods 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 4
- 229910001220 stainless steel Inorganic materials 0.000 claims description 4
- 239000010935 stainless steel Substances 0.000 claims description 4
- 230000003068 static effect Effects 0.000 claims description 4
- 238000009434 installation Methods 0.000 claims description 2
- 230000000630 rising effect Effects 0.000 claims description 2
- 230000009466 transformation Effects 0.000 abstract 1
- 238000006243 chemical reaction Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000005484 gravity Effects 0.000 description 2
- 230000002457 bidirectional effect Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000002262 irrigation Effects 0.000 description 1
- 238000003973 irrigation Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B13/00—Irrigation ditches, i.e. gravity flow, open channel water distribution systems
- E02B13/02—Closures for irrigation conduits
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B5/00—Artificial water canals, e.g. irrigation canals
- E02B5/08—Details, e.g. gates, screens
- E02B5/082—Closures
Abstract
The invention discloses a kind of butterfly valve type flap valves and its application method for reversible passage, including the No.1 baffle and No. two baffles being made of upper and lower two pieces of small front aprons, the flap valve axis and reversible passage of fixed flap valve；No.1, No. two baffles are connected in baffle plate groove, are controlled No.1, No. two baffle positions by headstock gear, are realized the transformation of flap valve form；The interface of flap valve and upper lower baffle plate is provided with gasket item, can mitigate the impact force between flap valve and baffle, extends the service life of flap valve and baffle.When reversible passage serves as outlet passage, butterfly valve type flap valve forward direction is opened, is reversely automatically closed；When reversible passage serves as water inlet flow channel, butterfly valve type flap valve is reversely opened, forward direction is automatically closed.Compared to traditional flap valve, application field of the invention is more extensive.
Description
Technical field
The present invention relates to a kind of cut-off devices and its application method for being used in reversible passage, specially a kind of for two-way
The butterfly valve type flap valve and its application method of runner, belong to hydraulic engineering technical field.
Background technique
In pump station engineering, water outlet cutout need to generally install flap valve.Traditional flap valve be all it is unidirectionally controlled, water pump open
Flap valve, which automatically opens out, afterwards flows, and net synchronization capability is good, and can close by self weight.Water outlet application of traditional flap valve in one-way water pump
It is more, and for using reversible passage to realize the two-way pump station of irrigation and drainage function, realizing that row stores the water pump of function using reversible passage
Water turbine set, traditional flap valve cannot be applied.
Summary of the invention
Place proposes a kind of butterfly valve type flap valve and its application method for reversible passage to the present invention against the above deficiency,
It is mainly used in the reversible passage with Inlet and outlet water function.
The purpose of the present invention is what is be achieved through the following technical solutions:
A kind of butterfly valve type flap valve for reversible passage, including reversible passage, flap valve, characterized in that the butterfly valve type flap valve also wraps
No.1 baffle, No. two baffles and flap valve axis are included, the No.1 baffle, No. two baffles are respectively perpendicular and are installed on reversible passage,
Including overhead gage, lower baffle plate, two connecting rods, two connecting rods are parallel and set, upper and lower end respectively with corresponding upper and lower gear
Plate is fixedly connected；The flap valve axle position passes through flap valve axis and reversible passage side between No.1, No. two baffles in the middle part of the flap valve
Wall rotation connection；No.1, No. two baffles pass through headstock gear respectively and lift or transfer, and flap valve rotates under flow action, both ends
It contacts, or is respectively placed between corresponding upper and lower baffle with corresponding overhead gage or lower baffle plate respectively, be in reversible passage and close
It closes, intake or effluent state.
Preferably, the No.1, No. two baffles are connected by baffle plate groove and reversible passage installation, setting in the baffle plate groove
There is sealing.
Preferably, the No.1, the height of No. two baffles are all larger than reversible passage height, and one of baffle is raised,
I.e. its overhead gage is higher than at the top of reversible passage, and lower baffle plate bottom is flushed with reversible passage bottom, then another block baffle is lowered, i.e.,
It is flushed at the top of its overhead gage with reversible passage top, lower baffle plate exceeds reversible passage bottom.
Preferably, the overhead gage, lower baffle plate are being respectively inclined surface with flap valve end contact position, the flap valve end part
The gasket item that She You not match with inclined surface.
Preferably, the flap valve two sides are equipped with side sealing.
Preferably, the overhead gage, lower baffle plate, flap valve use stainless steel material.
A kind of application method of above-mentioned butterfly valve type flap valve for reversible passage, characterized in that the following steps are included:
1) when reversible passage is as outlet passage
When outlet passage does not have water flow, flap valve remains static, at this point, No.1 baffle, close to external water stream, holding is mentioned
The state of rising, No. two baffle holdings are lowered state, and under external flow action, one end and the overhead gage of No. two baffles connect flap valve
Touching, the other end are contacted with the lower baffle plate of No.1 baffle, block external water stream, outlet passage is in close state；
When outlet passage starts water outlet, flap valve is washed open by water flow, and flap valve both ends are respectively placed between corresponding upper and lower baffle,
And reaching stable state in impulsive force, buoyancy and gravitational equilibrium, reversible passage is in effluent state；
At the end of water outlet, flap valve returns to stationary state under external flow action, prevents water flow adverse current, and outlet passage is in
Closed state；
2) when outlet passage is converted to water inlet flow channel
A: first putting down No.1 baffle, and No. two baffles are lifted, and under external flow action, flap valve is rotated, one end and No.1
The overhead gage inner side edge of baffle contacts, and the other end is contacted with the lower baffle plate inner side edge of No. two baffles；
B: again lifting No.1 baffle, and No. two baffles are put down, at this point, flap valve reaches the working condition under water inlet flow channel operating condition,
Flap valve is washed open by water flow, and flap valve both ends are respectively placed between corresponding upper and lower baffle；
C: finally putting down No.1 baffle, and No. two baffles are lifted, and so that flap valve is reached when stopping water inlet preventing water flow inverse
The purpose of stream, such flap valve form convert；
3) when reversible passage is as water inlet flow channel
When water inlet flow channel does not have water flow, flap valve remains static, at this point, No.1 baffle, close to external water stream, holding is put
Lower state, No. two baffle holdings are raised state, and under external flow action, one end and the lower baffle plate of No. two baffles connect flap valve
Touching, the other end are contacted with the overhead gage of No.1 baffle, block external water stream, water inlet flow channel is in close state；
When water inlet flow channel starts water inlet, flap valve is washed open by water flow, and flap valve both ends are respectively placed between corresponding upper and lower baffle,
And reaching stable state in impulsive force, buoyancy and gravitational equilibrium, reversible passage is in water inlet state；
In water inlet end, flap valve returns to stationary state under external flow action, prevents water flow adverse current, and water inlet flow channel is in
Closed state.
Preferably, the baffle, which is raised, refers to that the overhead gage of baffle is higher than at the top of reversible passage, lower baffle plate bottom and double
It is flushed to runner bottom；The baffle is lowered at the top of the overhead gage for referring to baffle and flushes at the top of reversible passage, and lower baffle plate is super
Reversible passage bottom out.
Butterfly valve type flap valve of the invention is mounted on water inlet and the water outlet of reversible passage, water flow forward direction opens,
The flap valve being reversely automatically closed, i.e., when reversible passage serves as outlet passage, the unlatching of flap valve forward direction (wash open in outlet passage by water flow
Flap valve), be reversely automatically closed that (without water flow in outlet passage, flap valve is under external flow action, and both ends are by corresponding baffle
Runner is closed in limit)；When reversible passage serves as water inlet flow channel, flap valve reversely open (water flow washes flap valve open in water inlet flow channel),
Forward direction be automatically closed (without water flow in water inlet flow channel, flap valve under external flow action, both ends by corresponding baffle limiting,
Close runner).Compared to traditional flap valve, flap valve application field of the invention is more extensive.
The invention has the following advantages that
1, traditional flap valve structure cannot apply in reversible passage usually as one-way cock, and the principle of the invention is simple, behaviour
Facilitate, control two baffles using headstock gear and move up and down, realize water inlet flap valve by 3 steps and is discharged turning for flap valve
It changes.
2, the two-way flap valve of butterfly valve type designed by the present invention can accomplish quick flow-breaking when water flow refluence occurs in runner,
Guarantee reversible passage waterflow stabilization.
3, the inclined surface that baffle is connected with flap valve is bonded with the gasket item perfection on flap valve, reaches sealing in cutout
Purpose, and gasket item can also mitigate the impact force between flap valve and baffle, extend the service life of flap valve and baffle.
Detailed description of the invention
Fig. 1 is shown as a kind of general arrangement of the butterfly valve type flap valve for reversible passage of the present invention；
Fig. 2 is shown as a kind of floor plan of the butterfly valve type flap valve for reversible passage of the present invention；
Fig. 3 is shown as a kind of baffle schematic diagram of the butterfly valve type flap valve for reversible passage of the present invention；
Fig. 4 is shown as a kind of flap valve baffle junction detail structure figure of the butterfly valve type flap valve for reversible passage of the present invention；
Fig. 5 is shown as a kind of water outlet flap valve stationary state figure of the butterfly valve type flap valve for reversible passage of the present invention；
Fig. 6 is shown as a kind of water outlet flap valve operating status figure of the butterfly valve type flap valve for reversible passage of the present invention；
Fig. 7 is shown as a kind of water outlet flap valve counterflow-preventing state diagram of the butterfly valve type flap valve for reversible passage of the present invention；
Fig. 8 is shown as a kind of one state diagram of flap valve form conversion step of the butterfly valve type flap valve for reversible passage of the present invention；
Fig. 9 is shown as a kind of flap valve form conversion step two-state figure of the butterfly valve type flap valve for reversible passage of the present invention；
Figure 10 is shown as a kind of flap valve form conversion step three condition figure of the butterfly valve type flap valve for reversible passage of the present invention；
Figure 11 is shown as a kind of water inlet flap valve stationary state figure of the butterfly valve type flap valve for reversible passage of the present invention；
Figure 12 is shown as a kind of water inlet flap valve operating status figure of the butterfly valve type flap valve for reversible passage of the present invention；
Figure 13 is shown as a kind of water inlet flap valve counterflow-preventing state diagram of the butterfly valve type flap valve for reversible passage of the present invention；
In figure: 1- No.1 baffle；1-1-No.1 overhead gage；1-2- No.1 lower baffle plate；No. bis- baffles of 2-；No. bis- overhead gages of 2-1-；
No. bis- lower baffle plates of 2-2-；3- connecting screw；4- baffle plate groove；5- gasket item；6- headstock gear screw rod；7- flap valve；8- flap valve axis；9- is bis-
To runner；10- water (flow) direction.
Specific embodiment
Below in conjunction with attached drawing, detailed description of the preferred embodiments, a kind of butterfly valve for reversible passage
Formula flap valve is mainly used in the reversible passage with Inlet and outlet water function.
As shown in Fig. 2, a kind of butterfly valve type flap valve for reversible passage of the present invention, including No.1 baffle 1, No.1 overhead gage
1-1, No.1 lower baffle plate 1-2, No. two baffles 2, No. two overhead gages 2-1, No. two lower baffle plate 2-2, connecting screw 3(, that is, connecting rod),
Baffle plate groove 4, gasket item 5, headstock gear screw rod 6, flap valve 7, flap valve axis 8, reversible passage 9, water (flow) direction 10.
No.1 of the invention, No. two baffles are made of upper and lower two pieces of small front aprons, are respectively as follows: No.1 overhead gage 1-1, No.1
Lower baffle plate 1-2, No. two overhead gages 2-1, No. two lower baffle plate 2-2.
No.1 overhead gage 1-1 and No.1 lower baffle plate 1-2 is rigidly connected by connecting screw 3, No. two overhead gage 2-1 and No. two
Lower baffle plate 2-2 is also rigid connection with connecting screw 3, and each baffle is connected in baffle plate groove 4, and baffle plate groove 4 sets sealing.
No.1, two block baffles up and down (1-1,1-2,2-1,2-2) of No. two baffles and connecting screw 3 are stainless steel
Material has good corrosion resistance.
The design structure of No.1 baffle as shown in figure 3, upper and lower two block baffle (1-1,1-2) can approximation be regarded as cuboid knot
There are the inclined-plane being in contact with flap valve gasket item 5 in structure, the downside No.1 overhead gage 1-1 and the upside No.1 lower baffle plate 1-2.On the right side of Fig. 3
For the structural map of No.1 overhead gage 1-1.
No.1, No. two baffles overhead gage (1-1,2-1) configure a frame headstock gear, by headstock gear screw rod 6 and it is each on
Baffle (1-1,2-1) connection, headstock gear screw rod 6 and each overhead gage (1-1,2-1) are rigid connection.
Flap valve 7 is made by stainless steel material, is fixed in reversible passage 9 by flap valve axis 8, and 7 two sides of flap valve are provided with
Rubber side sealing, 8 both ends of door-hinge and 9 liang of walls of reversible passage are rigid connection.
Four faces setting that flap valve 7 is in contact with two block baffles up and down (1-1,1-2,2-1,2-2) of No.1, No. two baffles
There is gasket item 5, as shown in figure 4, the width of gasket item 5 is more than or equal to the width of the inclined surface of each baffle plate setting.
It is positive as shown, water flow is turned left from the right side, when reversible passage serves as outlet passage, butterfly valve type flap valve forward direction is opened
It opens, be reversely automatically closed；When reversible passage serves as water inlet flow channel, butterfly valve type flap valve is reversely opened, forward direction is automatically closed.
A kind of application method of the butterfly valve type flap valve for reversible passage of the present invention is as follows:
1, when reversible passage is as outlet passage
Reversible passage 9 is used as outlet passage, and the stationary state of flap valve 7 is as shown in figure 5, the holding of No.1 baffle 1 at this time is raised shape
State, No. two holdings of baffle 2 are lowered state, and flap valve 7 abuts No.1 lower baffle plate 1-2 and No. two under external water stream, gravity
Without water flow in overhead gage 2-1(, that is, runner, under external flow action, No.1 lower baffle plate, No. two overhead gages are respectively to flap valve end
Portion's limit, blocks flap valve), external water stream is blocked, outlet passage is in close state.
When runner starts water outlet, flap valve 7 is washed open by water flow, reaches one in impulsive force, buoyancy and gravitational equilibrium
Stable state as shown in Figure 6 (flap valve both ends are respectively placed between corresponding upper and lower baffle, not with corresponding overhead gage, lower baffle plate
Contact).
To prevent water flow adverse current, at the end of water outlet, it is as shown in Figure 7 that flap valve 7 returns to initial position.
2, flap valve form is converted
Assuming that 9 original state of reversible passage is outlet passage, 7 form of flap valve is as shown in Figure 7.When outlet passage is converted to feed water flow
When road, the conversion of 7 form of flap valve is as follows:
Step 1: first putting down No.1 baffle 1, and No. two baffles 2 are lifted, under flow action, 7 state of flap valve such as Fig. 8 institute
Show that (under external flow action, flap valve rotation, one end is contacted with the overhead gage inner side edge of No.1 baffle, the other end and No. two gears
The lower baffle plate inner side edge of plate contacts).
Step 2: again lifting No.1 baffle 1, No. two baffles 2 is put down, flap valve 7 reaches under water inlet flow channel operating condition at this time
Working condition, 7 state of flap valve is as shown in Figure 9.
Step 3: finally putting down No.1 baffle 1, and No. two baffles 2 are lifted, and flap valve 7 is enable to reach when stopping water inlet
To the purpose for preventing water flow adverse current, 7 state of flap valve is as shown in Figure 10, and such flap valve form converts.
Three steps of above-mentioned conversion, the operating time is very fast, flap valve be in Step 1: the state for time in step 2 very
It is short.
3, when reversible passage is as water inlet flow channel
Reversible passage 9 is used as water inlet flow channel, and the stationary state of flap valve 7 is as shown in figure 11, and the holding of No.1 baffle 1 at this time is laid down shape
State, No. two holdings of baffle 2 are raised state, and flap valve 7 abuts No.1 overhead gage 1-1 and No. two under external water stream, gravity
Without water flow in lower baffle plate 2-2(, that is, runner, under external flow action, No.1 lower baffle plate, No. two overhead gages are respectively to flap valve end
Portion's limit, blocks flap valve), runner is closed.
When runner starts water inlet, flap valve 7 is washed open by water flow, reaches one in impulsive force, buoyancy and gravitational equilibrium
Stable state is as shown in figure 12.
To prevent water flow adverse current, in water inlet end, it is as shown in figure 13 that flap valve 7 returns to initial position, and runner is closed.
Above-mentioned baffle, which is raised, refers to that the overhead gage of baffle is higher than at the top of reversible passage, lower baffle plate bottom and reversible passage bottom
Portion flushes；The baffle is lowered at the top of the overhead gage for referring to baffle and flushes at the top of reversible passage, and lower baffle plate exceeds bidirectional flow
Road bottom.
Above content has made more description in detail to the present invention with general text and specific implementation step, but simultaneously
Non- is to limit the invention, and the related amendments carried out without departing from theon the basis of the spirit of the present invention belong to the present invention
Claimed range.
Claims (8)
1. a kind of butterfly valve type flap valve for reversible passage, including reversible passage, flap valve, characterized in that the butterfly valve type flap valve is also
Including No.1 baffle, No. two baffles and flap valve axis, the No.1 baffle, No. two baffles are respectively perpendicular and are installed on reversible passage,
Include overhead gage, lower baffle plate, two connecting rods, two connecting rods are parallel and set, upper and lower end respectively with it is corresponding upper and lower
Baffle is fixedly connected；The flap valve axle position passes through flap valve axis and reversible passage between No.1, No. two baffles in the middle part of the flap valve
Side wall rotation connection；No.1, No. two baffles pass through headstock gear respectively and lift or transfer, and flap valve rotates under flow action, and two
End is contacted with corresponding overhead gage or lower baffle plate respectively, or is respectively placed between corresponding upper and lower baffle, and reversible passage is in
Closing, water inlet or effluent state.
2. a kind of butterfly valve type flap valve for reversible passage according to claim 1, characterized in that the No.1, No. two
Baffle is connected by baffle plate groove and reversible passage installation, is provided with sealing in the baffle plate groove.
3. a kind of butterfly valve type flap valve for reversible passage according to claim 1, characterized in that the No.1, No. two
The height of baffle is all larger than reversible passage height, and one of baffle is raised, i.e., its overhead gage is higher than at the top of reversible passage, under
Baffle bottom is flushed with reversible passage bottom, then another block baffle is lowered, i.e., neat with reversible passage top at the top of its overhead gage
Flat, lower baffle plate exceeds reversible passage bottom.
4. a kind of butterfly valve type flap valve for reversible passage according to claim 3, characterized in that the overhead gage, under
Baffle is being respectively inclined surface with flap valve end contact position, and the flap valve end is respectively equipped with the gasket to match with inclined surface
Item.
5. a kind of butterfly valve type flap valve for reversible passage according to claim 1, characterized in that the flap valve two sides are set
There is side sealing.
6. a kind of butterfly valve type flap valve for reversible passage according to claim 1, characterized in that the overhead gage, under
Baffle, flap valve use stainless steel material.
7. a kind of application method of butterfly valve type flap valve for reversible passage according to claim 1 to 6,
It is characterized in, comprising the following steps:
1) when reversible passage is as outlet passage
When outlet passage does not have water flow, flap valve remains static, at this point, No.1 baffle, close to external water stream, holding is mentioned
The state of rising, No. two baffle holdings are lowered state, and under external flow action, one end and the overhead gage of No. two baffles connect flap valve
Touching, the other end are contacted with the lower baffle plate of No.1 baffle, block external water stream, outlet passage is in close state；
When outlet passage starts water outlet, flap valve is washed open by water flow, and flap valve both ends are respectively placed between corresponding upper and lower baffle,
And reaching stable state in impulsive force, buoyancy and gravitational equilibrium, reversible passage is in effluent state；
At the end of water outlet, flap valve returns to stationary state under external flow action, prevents water flow adverse current, and outlet passage is in
Closed state；
2) when outlet passage is converted to water inlet flow channel
A: first putting down No.1 baffle, and No. two baffles are lifted, and under external flow action, flap valve is rotated, one end and No.1
The overhead gage inner side edge of baffle contacts, and the other end is contacted with the lower baffle plate inner side edge of No. two baffles；
B: again lifting No.1 baffle, and No. two baffles are put down, at this point, flap valve reaches the working condition under water inlet flow channel operating condition,
Flap valve is washed open by water flow, and flap valve both ends are respectively placed between corresponding upper and lower baffle；
C: finally putting down No.1 baffle, and No. two baffles are lifted, and so that flap valve is reached when stopping water inlet preventing water flow inverse
The purpose of stream, such flap valve form convert；
3) when reversible passage is as water inlet flow channel
When water inlet flow channel does not have water flow, flap valve remains static, at this point, No.1 baffle, close to external water stream, holding is put
Lower state, No. two baffle holdings are raised state, and under external flow action, one end and the lower baffle plate of No. two baffles connect flap valve
Touching, the other end are contacted with the overhead gage of No.1 baffle, block external water stream, water inlet flow channel is in close state；
When water inlet flow channel starts water inlet, flap valve is washed open by water flow, and flap valve both ends are respectively placed between corresponding upper and lower baffle,
And reaching stable state in impulsive force, buoyancy and gravitational equilibrium, reversible passage is in water inlet state；
In water inlet end, flap valve returns to stationary state under external flow action, prevents water flow adverse current, and water inlet flow channel is in
Closed state.
8. a kind of application method of butterfly valve type flap valve for reversible passage according to claim 7, characterized in that described
Baffle, which is raised, refers to that the overhead gage of baffle is higher than at the top of reversible passage, and lower baffle plate bottom is flushed with reversible passage bottom；It is described
Baffle is lowered at the top of the overhead gage for referring to baffle and flushes at the top of reversible passage, and lower baffle plate exceeds reversible passage bottom.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910853410.3A CN110453651A (en) | 2019-09-10 | 2019-09-10 | A kind of butterfly valve type flap valve and its application method for reversible passage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910853410.3A CN110453651A (en) | 2019-09-10 | 2019-09-10 | A kind of butterfly valve type flap valve and its application method for reversible passage |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110453651A true CN110453651A (en) | 2019-11-15 |
Family
ID=68491477
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910853410.3A Pending CN110453651A (en) | 2019-09-10 | 2019-09-10 | A kind of butterfly valve type flap valve and its application method for reversible passage |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110453651A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1616774A (en) * | 2004-11-23 | 2005-05-18 | 武汉大学 | Sluice gate flow cutting off method and hinge type quick gate |
| KR100916150B1 (en) * | 2009-03-24 | 2009-09-08 | 안중영 | Flap valve device |
| CN203131054U (en) * | 2013-03-05 | 2013-08-14 | 武汉大学 | Cutoff device |
| CN105568941A (en) * | 2015-03-05 | 2016-05-11 | 苏州多固工程设计有限公司 | Manufacturing method for automatic flap valve of irrigation and drainage water pump |
| CN108895181A (en) * | 2018-08-31 | 2018-11-27 | 杭州全威科技有限公司 | A kind of nonreturn valve core |
| CN210712757U (en) * | 2019-09-10 | 2020-06-09 | 扬州大学 | Butterfly valve type flap valve for bidirectional flow passage |
-
2019
- 2019-09-10 CN CN201910853410.3A patent/CN110453651A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1616774A (en) * | 2004-11-23 | 2005-05-18 | 武汉大学 | Sluice gate flow cutting off method and hinge type quick gate |
| KR100916150B1 (en) * | 2009-03-24 | 2009-09-08 | 안중영 | Flap valve device |
| CN203131054U (en) * | 2013-03-05 | 2013-08-14 | 武汉大学 | Cutoff device |
| CN105568941A (en) * | 2015-03-05 | 2016-05-11 | 苏州多固工程设计有限公司 | Manufacturing method for automatic flap valve of irrigation and drainage water pump |
| CN108895181A (en) * | 2018-08-31 | 2018-11-27 | 杭州全威科技有限公司 | A kind of nonreturn valve core |
| CN210712757U (en) * | 2019-09-10 | 2020-06-09 | 扬州大学 | Butterfly valve type flap valve for bidirectional flow passage |
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