CN105089124B - Method and mechanism for starting drain valve - Google Patents
Method and mechanism for starting drain valve Download PDFInfo
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- CN105089124B CN105089124B CN201410195585.7A CN201410195585A CN105089124B CN 105089124 B CN105089124 B CN 105089124B CN 201410195585 A CN201410195585 A CN 201410195585A CN 105089124 B CN105089124 B CN 105089124B
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- water
- drainage channel
- water fender
- draining valve
- fender
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Abstract
The invention discloses a method and a mechanism for starting a drain valve. The mechanism for starting the drain valve comprises a base with a drain channel, a water stopping disc, a water stopping rubber mat, a starting rod and a water barrier. The water stopping disc is used for covering the drain channel, the water stopping rubber mat is fixedly connected onto the water stopping disc and is used for sealing the drain channel, the starting rod can vertically reciprocate and is used for lifting the water stopping disc, the water barrier is arranged in the drain channel and can be in a closed state or a released state by means of switching in a reciprocating manner, a water storage cavity is enclosed by the water barrier in the closed state, the drain channel and the water stopping disc, the drain channel can be opened when the water barrier is in the released state, and water in the water storage cavity can be drained. The method and the mechanism have the advantages that when the drain valve is started, the water storage cavity is filled with the water at first, so that water pressures on the bottom surface of the water stopping disc can be offset by water pressures on the top surface of the water stopping disc, then the water stopping disc can be lifted by the aid of little force, an operating force value of the drain valve can be reduced, and the mechanism is good in operating hand feel.
Description
Technical field
Start method and the actuating mechanism using the method the present invention relates to a kind of draining valve.
Background technology
On startup, hydraulic pressure is directly acted on water-stop tray existing draining valve, and the whole of draining is carried out draining valve is opened
In the middle of individual process, water-stop tray bears the downward pressure effect that its top water gives for a long time；Meanwhile, just start what is started
Stage, water-stop tray still suffers from the downward suction of water below.So, existing draining valve is starting the whole of draining
Individual operating process is required for spending larger operation strength, have impact on the experience of user, and feel is bad.
The content of the invention
Start method and the actuating mechanism using the method the invention provides a kind of draining valve, which overcome background technology
Existing deficiency.The technical solution adopted for the present invention to solve the technical problems is：
A kind of draining valve starts method, and the water-stop tray being connected with starting bar covers the drainage channel on base, affixed
Water stop rubber pad on water-stop tray seals the drainage channel, is arranged on water fender in the drainage channel and the drainage channel and should
Water-stop tray surrounds water storage cavity；Lift starting bar during startup, water first makes the bottom surface of the water-stop tray afford water full of the water storage cavity
Pressure is so that it balances each other with the pressure of the water of water-stop tray upper surface；Then, the starting bar lifts the water-stop tray and opens the row
Aquaporin, the water fender remove the drainage channel or in the drainage channel rotating opening drainage channel so that in the water storage cavity
Water is emptied.
Among one preferred embodiment：Water is full of the water storage cavity by the through hole in the middle part of the water-stop tray, and the starting bar is provided with
End cap for covering the through hole, the through hole is first opened after the starting bar is moved up during startup makes water be full of the water storage cavity, so
Afterwards, the starting bar continues to move up and lift again the water-stop tray and then open the drainage channel.
A kind of draining valve actuating mechanism, including be provided with the base of drainage channel, the water-stop tray for covering the drainage channel,
Being fixed on water-stop tray is used to seal the water stop rubber pad of the drainage channel, can move back and forth vertically and for lifting the water-stop tray
Starting bar, also including being arranged in the drainage channel and the water fender that can back and forth switch between closure state and release conditions,
The water fender surrounds water storage cavity in closure state and the drainage channel and the water-stop tray, and the water fender opens the row in release conditions
Aquaporin empties the water in the water storage cavity.
Among one preferred embodiment：Also include the control piece being connected with the starting bar, the control piece is in the water storage cavity
The water fender is set to be switched to release conditions full of the water fender is opened after water.
Among one preferred embodiment：The water fender includes two retractable hinges, and the hinge is rotationally articulated in this
In drainage channel.
Among one preferred embodiment：The inside edge position of the hinge is pivotally connected with the base, in the inside edge of the hinge
Portion position extends be provided with limited block straight up；The bottom surface of the control piece is provided with limited impression, and described two limited blocks are at this
Water fender is inserted into the limited impression when being in closure state, when the water fender is in release conditions with the limited block point
From；The draining valve actuating mechanism is also included for making described two hinges elastic component closed together.
Among one preferred embodiment：The outer ledge position of the hinge is pivotally connected with the base, the inside edge of the hinge
Middle part is provided with jack；The bottom surface of the control piece is provided with inserted link, and the inserted link is inserted into institute when the water fender is in closure state
State and prevented in two jacks described two hinges openings, and extracted out from two jack when water fender is in release conditions, the row
Water valve actuating mechanism is also included for making described two hinges elastic component closed together.
Among one preferred embodiment：The middle part of the water-stop tray vertically through be provided with connect with the water storage cavity lead to
Hole, the starting bar bottom extends the end cap being provided with for covering the through hole laterally.
Among one preferred embodiment：The water fender can be reciprocatingly arranged in the drainage channel vertically, the water fender
The bottom of the control piece is connected to, the control piece drives water fender synchronous with the starting bar after the water storage cavity is full of water
Moving up makes water fender be switched to release conditions.
Among one preferred embodiment：The middle part of the water-stop tray vertically through be provided with connect with the water storage cavity lead to
Hole, the starting bar bottom extends the end cap being provided with for covering the through hole laterally.
Among one preferred embodiment：The water fender is rotatably arranged in the drainage channel, and the water fender deviates wherein
The position of heart line is provided with the rotating shaft being pivotally connected with the base, and the water fender is divided into macroplate part and platelet block portion by the rotating shaft
Point, the water-stop tray is connected to the starting bar bottom, and the control piece is connected on the starting bar with the starting bar and water-stop tray synchronization
Vertical shift, the control piece is provided with the blocking arm extending into the drainage channel, and the bottom of the blocking arm is provided with hook portion；The base is at this
Be provided with drainage channel for prevent the water fender rotate block, the block can around its middle part rotate set, the block it is upper
End abuts with the blocking arm, and the lower end of the block abuts with small plate part；The hook portion is mobile straight up to promote the block to rotate
It is separated so as to release limitation of the block to the water fender with the small plate part afterwards, hydraulic pressure to be acted on and make this on the water fender
Water fender upset is switched to release conditions, and the draining valve actuating mechanism is also included for making the water fender be cut from release conditions upset
Change to the elastic component of closure state.
Compared with background technology, it has the following advantages that the technical program：
1. the water fender surrounds water storage cavity in closure state and the drainage channel and the water-stop tray, and during startup, water is first full of
The water storage cavity enables that the hydraulic pressure being subject on the water-stop tray bottom surface is offseted with the hydraulic pressure being subject on the water-stop tray top surface,
The suction that drainage channel is produced to the water-stop tray can be eliminated simultaneously, can use less power to lift the water-stop tray afterwards, had
Have the advantages that operating handle is good.
2. water is full of the water storage cavity by the through hole in the middle part of the water-stop tray, it is only necessary to lightly lifts the starting bar and just can
Opening the through hole makes the full water storage cavity of current, it is not necessary to which overall to lift the water-stop tray, operation strength is small.
3. described two limited blocks are inserted into the limited impression in closure state, ensure that the water fender is in closure
State, during the starting bar is moved up, can not only open the water-stop tray, but also can lift after the water-stop tray is opened
The control piece makes the limited impression release the limitation to the limited block, simple structure.
4. when the water fender is in closure state, the inserted link is inserted into described two jacks and prevents the hinge from opening, should
During starting bar is moved up, the water-stop tray can not only be opened, but also can when the control piece is lifted by the inserted link from
After the jack is extracted out, the hinge is set to realize upset, simple structure.
5. the water fender can be reciprocatingly arranged in the drainage channel vertically, and the control piece is same with the starting bar
Step is switched to release conditions, simple structure by moving up from closure state.
6. the block is connected between the blocking arm and the water fender, is rotated stable against the water fender, only in the hook
Portion could release the block to the water fender after moving promotion block rotation straight up with small plate part phase separation
Limitation, stabilized structure.
Brief description of the drawings
The invention will be further described with reference to the accompanying drawings and examples.
Fig. 1 depicts a kind of perspective exploded view of draining valve actuating mechanism first embodiment of the invention.
Fig. 2 depicts the partial schematic sectional view of draining valve actuating mechanism shown in Fig. 1.
Fig. 3 depicts the schematic diagram that the through hole on the water-stop tray of draining valve actuating mechanism shown in Fig. 1 is opened.
Fig. 4 depicts the schematic diagram that the water-stop tray of draining valve actuating mechanism shown in Fig. 1 is opened.
The water fender that Fig. 5 depicts draining valve actuating mechanism shown in Fig. 1 cuts the schematic diagram in release conditions.
Fig. 6 depicts a kind of schematic cross-sectional view of draining valve actuating mechanism second embodiment of the invention.
Fig. 7 depicts the schematic perspective view of the water fender of draining valve actuating mechanism shown in Fig. 6.
Fig. 8 depicts a kind of schematic cross-sectional view of draining valve actuating mechanism 3rd embodiment of the invention.
Fig. 9 depicts a kind of schematic cross-sectional view of draining valve actuating mechanism fourth embodiment of the invention.
Figure 10 depicts the schematic perspective view of the water fender of draining valve actuating mechanism shown in Fig. 9.
Specific embodiment
Embodiment one：
Refer to Fig. 1 and Fig. 2, a kind of draining valve actuating mechanism of the invention, including base 10, water-stop tray 20, starting bar
30th, water fender 40, control piece 50, elastic component 60.
The base 10 is provided with drainage channel 12.The water-stop tray 20 is used to cover the open top of the drainage channel 12, sealing
An affixed water stop rubber pad 21 on disk 20, for sealing the drainage channel 12 when draining valve is closed, prevents water from entering into the draining
In passage 12.The middle part of the water-stop tray 20 is vertically through being provided with through hole 22.The starting bar 30 can be moved back and forth simultaneously vertically
For raising the water-stop tray 20.The bottom of starting bar 30 extends the end cap 32 being provided with for covering the through hole 22 laterally.
The water fender 40 is arranged in the drainage channel 12.The water fender 40 in closure state (as shown in Figure 2) and can be released
Put and back and forth switch between state (as shown in Figure 5).The water fender 40 in closure state with the drainage channel 12 and the water-stop tray
20 surround water storage cavity 70, and water can be full of the water storage cavity 70 through the moment of through hole 22.The water fender 40 is opened in release conditions
Water in the rapid deflation of drainage channel 12 water storage cavity 70.The water fender 40 includes two retractable hinges 42, the hinge
42 are rotationally articulated in the drainage channel 12.The inside edge position of the hinge 42 is pivotally connected with the base 10, the hinge 42
The middle part of inside edge position extend be provided with limited block 422 straight up.It is described when the horizontality of two hinge 42 is closed
Two limited blocks 422 are pressed against.The two ends of the elastic component 60 are connected with described two hinges 42 respectively, and the elastic component 60 is used
In described two hinges 42 are pulled, enable that two hinges 42 are closed together, draining terminates rear elastic component 60 can make the dash
Plate 40 is switched to closure state from release conditions.
The control piece 50 is used to open and discharge the water fender 40, the water fender 40 is switched to from closure state and releases
Put state.The control piece 50 is connected with the starting bar 30.The bottom surface of the control piece 50 is provided with limited impression 52, described two
Individual limited block 422 is inserted into the limited impression 52 when the water fender 40 is in closure state.
Before activation, water is entirely located on the water-stop tray 20.
Fig. 3 is refer to, during startup, the starting bar 30 is first moved straight up, meanwhile, the end cap 32 opens the through hole 22,
Water quickly fills with the water storage cavity 70 by the through hole 22, and the bottom surface of the water-stop tray 20 affords the pressure of water, the bottom of water-stop tray 20
The pressure of the water being subject on face is offseted with the pressure of the water being subject on the top surface of water-stop tray 20.The limited block 422 is limited by this
The limitation of position groove 52, makes the hinge 42 to rotate.
Refer to Fig. 4, the starting bar 30 is continued to move up, the starting bar 30 rise to after certain altitude with the water-stop tray
20 in the vertical direction phase clampings simultaneously drive the water-stop tray 20 to move upwardly together, and open the drainage channel 12.
Fig. 5 is refer to, after the starting bar 30 continues to move up certain distance, the water-stop tray 20 is with the control piece 50 perpendicular
The upward phase clamping of Nogata simultaneously drives the control piece 50 to move upwardly together, and the limited impression 52 is separated with the limited block 422,
Under gravity and the pressure effect of water, the hinge 422 downwardly turns over the opening drainage channel 12, the i.e. water fender 40 and is switched to and releases
Put state, 70 in the water storage cavity in water can be by rapid deflation.
Embodiment two：
Fig. 6 and Fig. 7 is refer to, embodiment two is with the difference of embodiment one：The outer ledge position of hinge 42a
Lower section is pivotally connected with the base 10, and jack 424 is provided with the middle part of the inside edge of hinge 42a；Set on the bottom surface of control piece 50a
There is inserted link 54, the inserted link 54 is inserted into described two jacks 424 when the water fender is in closure state, so as to prevent described
Two hinge 42a downwardly turn over opening.
After control piece 50a is moved up and the inserted link 54 is extracted out from the jack 424, hydraulic pressure acts on the hinge
Hinge 42a is opened on 42a.Elastic component is attached between the base 10 and hinge 42a, makes hinge 42a after opening
Horizontal closed state can be automatically reset to.
Embodiment three：
Fig. 8 is refer to, embodiment three is with the difference of embodiment one：Water fender 40b can reciprocatingly set vertically
Put in the drainage channel 12, water fender 40b is connected to the bottom of control piece 50b, water fender 40b and the control piece
50b is integrally formed.After control piece 50b is moved up and removes drainage channel 12, water can rapidly from the drainage channel
12 discharges.
Example IV：
Fig. 9 and Figure 10 is refer to, example IV is with the difference of embodiment one：Water fender 40c rotatably arranged with
In the drainage channel 12, the position that water fender 40c deviates its center line is provided with the rotating shaft 44 being pivotally connected with the base 10, should
Water fender 40c points is macroplate part 46 and small plate part 48 by rotating shaft 44；Water-stop tray 20c is integrally attached to the startup
Bar 30c bottoms, control piece 50c is connected on starting bar 30c synchronous reciprocal vertically with starting bar 30c and water-stop tray 20c
It is mobile；Control piece 50c is provided with the blocking arm 56 extending into the drainage channel 12, and the bottom of the blocking arm 56 is provided with hook portion 562；Should
Base 10 is provided with the block 14 for preventing water fender 40c from rotating in the drainage channel 12, and the block 14 can be around its middle part
Rotate and set, the upper end of the block 14 abuts with the blocking arm 56, and the lower end of the block 14 abuts with small plate part 48.
During startup, starting bar 30c, water-stop tray 20c, control piece 50c three synchronously move up certain distance, the sealing
Disk 20c opens the drainage channel 12 makes water quickly fill with the water storage cavity 70.Now, because the block 14 is pressed against small plate part
On 48, therefore, water fender 40c cannot be rotated from closure state and is switched to release conditions.When control piece 50c continues up shifting
After moving and make the hook portion 562 to promote the block 14 to rotate, the block 14 is once separated with the small plate part 48, i.e. the block
14 release the rotation limitation to water fender 40c, and hydraulic pressure is acted on is switched to water fender 40c upsets on water fender 40c
Release conditions.In the middle of the present embodiment, elastic component can be provided in the torsion spring between the base 10 and the rotating shaft 44, and torsion spring is produced
Torsion can make when draining terminate rear water plate 40c from release conditions upset be switched to closure state.
The above, only present pre-ferred embodiments, therefore can not according to this limit the scope of present invention implementation, i.e., according to
Equivalence changes that the scope of the claims of the present invention and description are made and modification, all should still belong in the range of the present invention covers.
Claims (11)
1. a kind of draining valve starts method, and the water-stop tray being connected with starting bar covers the drainage channel on base, is fixed in
Water stop rubber pad on the water-stop tray seals up the drainage channel, it is characterised in that：Be arranged on water fender in the drainage channel with
The drainage channel and the water-stop tray surround water storage cavity；Lift the starting bar during startup, water first makes the water-stop tray full of the water storage cavity
Bottom surface afford the pressure of water so that it balances each other with the pressure of the water of water-stop tray upper surface；Then, the starting bar lifts
The water-stop tray opens the drainage channel, and the water fender removes the drainage channel or the rotating opening drainage channel in the drainage channel
So that the water emptying in the water storage cavity.
2. a kind of draining valve according to claim 1 starts method, it is characterised in that：Water is by logical in the middle part of the water-stop tray
Hole is full of the water storage cavity, and the starting bar is provided with the end cap for covering the through hole, after the starting bar is moved up during startup first
Opening the through hole makes water full of the water storage cavity, and then, the starting bar to be continued to move up lift again the water-stop tray and then open and is somebody's turn to do
Drainage channel.
3. the draining valve described in a kind of use claim 1 starts the draining valve actuating mechanism of method, including is provided with drainage channel
Base, the water-stop tray for covering the drainage channel, be fixed on water-stop tray be used for seal the drainage channel water stop rubber pad,
Can move back and forth vertically and for lifting the starting bar of the water-stop tray, it is characterised in that：Also include being arranged in the drainage channel
And the water fender that can back and forth switch between closure state and release conditions, the water fender in closure state and the drainage channel and
The water-stop tray surrounds water storage cavity, and the water fender opens the drainage channel and empties water in the water storage cavity in release conditions.
4. a kind of draining valve actuating mechanism according to claim 3, it is characterised in that：Also include being driven with the starting bar connecting
The control piece for connecing, the control piece opens the water fender after the water storage cavity is full of water makes the water fender be switched to release conditions.
5. a kind of draining valve actuating mechanism according to claim 4, it is characterised in that：The water fender is retractable including two
Hinge, the hinge is rotationally articulated in the drainage channel.
6. a kind of draining valve actuating mechanism according to claim 5, it is characterised in that：The inside edge position of the hinge with
The base is pivotally connected, and the inside edge medium position of the hinge extends be provided with limited block straight up；Set on the bottom surface of the control piece
Limited location groove, described two limited blocks the water fender be in closure state when be inserted into the limited impression, in the dash
Plate is separated when being in release conditions with the limited block；The draining valve actuating mechanism is also included for closing described two hinges
Elastic component together.
7. a kind of draining valve actuating mechanism according to claim 5, it is characterised in that：The outer ledge position of the hinge with
The base is pivotally connected, and jack is provided with the middle part of the inside edge of the hinge；The bottom surface of the control piece is provided with inserted link, and the inserted link is at this
Water fender is inserted into described two jacks when being in closure state and prevents described two hinges from opening and be in water fender and released
Extracted out from two jack when putting state, the draining valve actuating mechanism is also included for making described two hinges bullet closed together
Property part.
8. a kind of draining valve actuating mechanism according to any one of claim 3 to 7, it is characterised in that：The water-stop tray
Vertically through being provided with the through hole that is connected with the water storage cavity, the starting bar bottom extends be provided with for covering laterally at middle part
The end cap of the through hole.
9. a kind of draining valve actuating mechanism according to claim 4, it is characterised in that：The water fender can be moved back and forth vertically
Be arranged in the drainage channel, the water fender is connected to the bottom of the control piece, the control piece the water storage cavity full of water with
Driving water fender synchronously to be moved up with the starting bar afterwards makes water fender be switched to release conditions.
10. a kind of draining valve actuating mechanism according to claim 9, it is characterised in that：The middle part of the water-stop tray is along vertical
The through hole for being provided with and being connected with the water storage cavity is run through in direction, and the starting bar bottom extends the end being provided with for covering the through hole laterally
Lid.
A kind of 11. draining valve actuating mechanisms according to claim 4, it is characterised in that：The water fender rotatably arranged with
In the drainage channel, the position that the water fender deviates its center line is provided with the rotating shaft being pivotally connected with the base, and the rotating shaft should
Water fender is divided into macroplate part and small plate part, and the water-stop tray is connected to the starting bar bottom, and the control piece is connected to this
With the starting bar and water-stop tray synchronization vertical shift on starting bar, the control piece is provided with the blocking arm extending into the drainage channel,
The bottom of the blocking arm is provided with hook portion；The base is provided with the block for preventing the water fender from rotating, the gear in the drainage channel
Block can be rotated around its middle part and set, and the upper end of the block abuts with the blocking arm, and the lower end of the block abuts with small plate part；Should
Hook portion is separated so as to release the block to the water fender after mobile promotion block is rotated with the small plate part straight up
Limitation, hydraulic pressure act on make on the water fender water fender overturn be switched to release conditions, the draining valve actuating mechanism is also wrapped
Include the elastic component for making the water fender that closure state is switched to from release conditions upset.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410195585.7A CN105089124B (en) | 2014-05-09 | 2014-05-09 | Method and mechanism for starting drain valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410195585.7A CN105089124B (en) | 2014-05-09 | 2014-05-09 | Method and mechanism for starting drain valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105089124A CN105089124A (en) | 2015-11-25 |
| CN105089124B true CN105089124B (en) | 2017-05-24 |
Family
ID=54570381
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410195585.7A Active CN105089124B (en) | 2014-05-09 | 2014-05-09 | Method and mechanism for starting drain valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105089124B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106759750B (en) * | 2017-01-03 | 2023-04-14 | 厦门瑞尔特卫浴科技股份有限公司 | Take drain valve of overflow pipe to fall structure of making an uproar |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0209477A1 (en) * | 1985-07-08 | 1987-01-21 | SOCIETE PHOCEENNE DE MATIERES PLASTIQUES " S P M P" Société Anonyme | Flushing device having a floating siphon bell for flushing tanks |
| US5265283A (en) * | 1990-02-23 | 1993-11-30 | Societe Phoceenne De Matieres Plastiques S.P.M.P. S.A. | Flushing mechanism having a submersible float controlled by a push button |
| CN201059012Y (en) * | 2007-07-10 | 2008-05-14 | 刘德辅 | Power-closing flushing valve |
| CN201546291U (en) * | 2009-10-30 | 2010-08-11 | 厦门市伯奥思卫浴科技有限公司 | Light-press magnetic force and gravity dual-seal water drain valve |
| CN201778379U (en) * | 2010-03-09 | 2011-03-30 | 广东联塑科技实业有限公司 | Drain valve |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200967984Y (en) * | 2006-06-30 | 2007-10-31 | 中山市贝斯特卫浴工业有限公司 | Water discharge valve |
| CN203516941U (en) * | 2013-09-27 | 2014-04-02 | 厦门瑞尔特卫浴科技股份有限公司 | Pilot type drain valve control mechanism |
| CN203846586U (en) * | 2014-05-09 | 2014-09-24 | 厦门瑞尔特卫浴科技股份有限公司 | Drainage valve starting mechanism |
-
2014
- 2014-05-09 CN CN201410195585.7A patent/CN105089124B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0209477A1 (en) * | 1985-07-08 | 1987-01-21 | SOCIETE PHOCEENNE DE MATIERES PLASTIQUES " S P M P" Société Anonyme | Flushing device having a floating siphon bell for flushing tanks |
| US5265283A (en) * | 1990-02-23 | 1993-11-30 | Societe Phoceenne De Matieres Plastiques S.P.M.P. S.A. | Flushing mechanism having a submersible float controlled by a push button |
| CN201059012Y (en) * | 2007-07-10 | 2008-05-14 | 刘德辅 | Power-closing flushing valve |
| CN201546291U (en) * | 2009-10-30 | 2010-08-11 | 厦门市伯奥思卫浴科技有限公司 | Light-press magnetic force and gravity dual-seal water drain valve |
| CN201778379U (en) * | 2010-03-09 | 2011-03-30 | 广东联塑科技实业有限公司 | Drain valve |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105089124A (en) | 2015-11-25 |
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