CN105757025B - The big flow three-way switch valve of valve element hollow structure - Google Patents
The big flow three-way switch valve of valve element hollow structure Download PDFInfo
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- CN105757025B CN105757025B CN201610227594.9A CN201610227594A CN105757025B CN 105757025 B CN105757025 B CN 105757025B CN 201610227594 A CN201610227594 A CN 201610227594A CN 105757025 B CN105757025 B CN 105757025B
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- valve
- valve element
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- annular groove
- oil inlet
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
- F16K11/02—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit
- F16K11/06—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements
- F16K11/065—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Multiple-Way Valves (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The invention discloses a kind of big flow three-way switch valve of valve element hollow structure.The present invention includes one-level pilot valve and two grades of triple valves.Described pilot valve can be four-way reversing valve or four-way servo valve, and it distributes the left and right control chamber that fluid enters two grades of triple valves, realizes the motion control to two grades of big flow threeway valve cores.Two grades of described big flow triple valves include valve element, valve pocket, valve body, pressure ring and end cap.Valve element has hollow structure, and fluid can flow in the cylindrical flow of center spool, increase fluid by equivalent flow area during valve element, can effectively reduce fluid and pass through restriction loss during reversal valve.
Description
Technical field
The present invention relates to a kind of low-power consumption big flow three-way switch valve, the big of vibratory impulse hydraulic system is especially adapted for use in
Flow three-way switch valve.
Background technology
Vibratory impulse hydraulic system is generally valve-controlled cylinder system, controls fluid flow direction real by switching valve valve core movement
The vibratory impulse action of existing hydraulic cylinder.In vibratory impulse system, hydraulic cylinder is generally single rod cylinder, preferably using Differential Control mode,
Small area end normal open high pressure, and large area end pressure is by three-way switch valve control.
With the continuous propulsion of the modernization of industry, the vibration frequency of vibratory impulse hydraulic system is improved constantly, threeway switching
The flow of valve constantly increases.Traditional three-way switch valve is generally sleeve valve structure, when big flow is by valve port, is existed larger
The pressure loss, the reduction of vibratory impulse system delivery efficiency, Frequency Response can be caused a series of problems, such as be deteriorated.Increase valve element straight
Footpath can reduce the valve port pressure loss, but excessive valve core diameter can increase valve element quality, can equally cause system delivery efficiency
Reduction and dynamic characteristic are deteriorated.During dither, the system delivery efficiency caused by main control valve is low and dynamic characteristic is deteriorated
The key factor further developed as restriction vibratory impulse system.
The content of the invention
It is an object of the invention to provide a kind of three-way switch valve of low-power consumption big flow, available for vibratory impulse hydraulic pressure system
System, improves system delivery efficiency, improves system dynamic characteristic.
Technical proposal that the invention solves the above-mentioned problems is：
The present invention includes one-level pilot valve and two grades of triple valves.Described pilot valve can be four-way reversing valve or four-way
Servo valve, it distributes the left and right control chamber that fluid enters two grades of triple valves, realizes the motion to two grades of big flow threeway valve cores
Control.Two grades of described big flow triple valves include valve element, valve pocket, valve body, pressure ring and end cap.Be respectively equipped with the valve body into
T mouthful of P mouthfuls of hydraulic fluid port and oil-out, it is inwardly through body wall, and corresponding with valve pocket oil inlet I and oil-out I are communicated, and it is outwards then
It is connected respectively with hydraulic system high-pressure oil passage and system oil return；Left control port C1 mouthfuls and right control are further respectively had on the valve body
Liquefaction mouthfuls C2 mouthful, it is inwardly through body wall, and the left control port corresponding with valve pocket, right control port are communicated, its to
A mouthfuls of control port outer with one-level pilot valve, B mouthfuls communicate respectively；The valve body rightmost side is provided with load hydraulic fluid port D, itself and valve element
Internal cavities are connected.Annular groove I, annular groove II, annular groove III and annular groove IV are respectively equipped with the valve pocket madial wall；Relatively
Left control port, right control port, the and of oil inlet I are respectively equipped with annular groove I, annular groove II, annular groove III and annular groove IV
Oil-out I, outwards runs through hydraulic fluid port corresponding to valve body after sleeve side wall and communicates.The valve element is hollow type structure, and there is cylinder at center
Shape cavity, cavity is communicated for hydraulic fluid port D mouthfuls with load；The valve element outer wall coordinates with valve sleeving inner wall for gap, and valve element can be in valve pocket
Slide；The valve element is provided with oil inlet II and oil-out II, and it is inwardly connected with valve core inside cavity；The valve element oil inlet II
With oil-out II when valve element slides into appropriate location, it can be connected respectively with the annular groove III and annular groove IV on the inside of valve pocket,
But both can not be connected simultaneously, i.e., when valve element oil inlet II is connected with the annular groove III on the inside of valve pocket, valve element oil-out
II can not connect with the annular groove IV on the inside of valve pocket, and vice versa；The valve element outer wall is provided with step I and step II, the He of step I
Step II can limit valve core movement scope, and step I forms left control oil with valve pocket annular groove I, valve sleeving inner wall and pressure ring-side wall
Chamber, step II forms right control oil pocket with valve pocket annular groove II, valve sleeving inner wall, valve pocket right wall.The pressure ring is coaxial with valve pocket
The hollow ring of the heart.
As to a kind of improvement of the big flow three-way switch valve of valve element hollow structure of the present invention：The valve element enters
Hydraulic fluid port II can be circumferentially equally distributed multiple oil-through-holes, and the valve element oil-out II can also be circumferentially to be uniformly distributed
Multiple oil-through-holes.
As to a kind of further improvement of the big flow three-way switch valve of valve element hollow structure of the present invention：It is described
Valve element can be provided only with oil inlet II, and the oil inlet II is when valve element slides into appropriate location, ring that can be with valve pocket madial wall
Shape groove III is connected；The annular groove IV of the valve pocket madial wall is located near valve element right side, when valve element is moved to the left in middle position
When, valve element right side can not be completely covered by annular groove IV, and annular groove IV is communicated with valve core inside cavity.
As to a kind of further improvement of the big flow three-way switch valve of valve element hollow structure of the present invention：It is described
Pressure ring madial wall can be provided with annular groove V, and annular groove V is provided with oil inlet III；The oil inlet III and valve body oil inlet P mouthful phase
Logical, now valve pocket no longer sets annular groove III and oil inlet I, and valve element also no longer sets oil inlet II；The pressure ring madial wall is set
Some annular grooves V are located near valve element left side, and when valve element moves right in middle position, valve element left side can not be completely covered by
Annular groove V, and annular groove V is communicated with valve core inside cavity.
As to a kind of further improvement of the big flow three-way switch valve of valve element hollow structure of the present invention：Valve body
Oil inlet P mouthful and T mouthfuls of oil-out can be with transposition.
As to a kind of further improvement of the big flow three-way switch valve of valve element hollow structure of the present invention：Valve element
Oil inlet II and oil-out II can be circular hole, rectangular opening or irregularly-shaped hole.
The invention has the advantages that：
（1）Valve element has hollow structure, and fluid can flow in the cylindrical flow of center spool, increase fluid
By equivalent flow area during valve element, fluid can be effectively reduced and pass through restriction loss during reversal valve.
（2）Cavity in the middle of valve element is directly connected with load hydraulic fluid port, can reduce fluid by steering number of times during reversal valve,
Fluid is obviously reduced and passes through power attenuation during reversal valve.
（3）The hollow structure of valve element helps to reduce valve element quality, and frequency response and the hydraulic system that can improve reversal valve are whole
Body frequency response, and reduce the driving power required for change-over valve core motion, it is favorably improved system whole efficiency.
Brief description of the drawings
Fig. 1 is the mechanical system of first embodiment of the invention and the catenation principle figure of hydraulic system.
Fig. 2 is Fig. 1 another working state schematic representation.
Fig. 3 is the mechanical system of second embodiment of the invention and the catenation principle figure of hydraulic system.
Fig. 4 is Fig. 3 another working state schematic representation.
Embodiment
Embodiment 1, Fig. 1 and Fig. 2 give a kind of two kinds of different working conditions of big flow three-way switch valve, including one-level
Pilot valve 1 and the two grades of two parts of triple valve 2 compositions, one-level pilot valve 1 directly using commercially available low discharge four-way reversing valve or can be watched
Take valve；Two grades of triple valves 2 include valve element 7, valve pocket 5, valve body 20, pressure ring 13 and end cap 12；It is respectively equipped with the outside wall surface of valve body 20
T mouthfuls of oil inlet P mouthful and oil-out, are connected with hydraulic system high-pressure oil passage and system oil return respectively, and it inwardly runs through the side of valve body 20
Wall；The outside wall surface of valve body 20 further respectively has left control port C1 mouthfuls and right control port C2 mouthfuls, respectively with the A mouths and B of pilot valve
Mouth is connected, and it inwardly runs through the side wall of valve body 20；The rightmost side of valve body 20 is provided with load hydraulic fluid port D
Annular groove I 14, annular groove II 4, annular groove III 10 and annular groove IV 9 are respectively equipped with the madial wall of valve pocket 5；Relative to
Annular groove I 14, annular groove II 4, annular groove III 10 and annular groove IV 9 are respectively equipped with left control port 18, right control port 3, entered
Hydraulic fluid port I 19 and oil-out I 21, outwards run through oily with left control port C1 mouthfuls on valve body 20, right control respectively after the side wall of valve pocket 5
T mouthfuls of C2 mouthfuls of mouth, oil inlet P mouth and oil-out are communicated；
Valve element 7 is hollow type structure, and there is cylindrical cavity 17 at center, and cavity 17 is communicated for hydraulic fluid port D mouthfuls with load；Outside valve element 7
Wall coordinates with the inwall of valve pocket 5 for gap, and valve element 7 can be slided in valve pocket 5；The side wall of valve element 7 is provided with oil inlet II 16 and fuel-displaced
Mouth II 6, it is inwardly connected with the internal cavities 17 of valve element 7；The oil inlet II 16 and oil-out II 6 of valve element 7 slide into suitable in valve element 7
When position, it can be connected respectively with the annular groove III 10 and annular groove IV 9 of the inner side of valve pocket 5, but both can not be connected simultaneously
It is logical；The outer wall of valve element 7 is provided with step I 15 and step II 8, and step I 15 and step II 8 can limit the range of movement of valve element 7；Pressure ring 13 is
The concentric hollow ring with valve pocket 5；The end cap 12 is fixed on valve body 20 with bolt, and pressure ring 13 is pressed in into valve pocket 5
On.
Step is as follows when specifically used：
1. when pilot reversing valve is under electromagnet effect or when manually operated time is located at left position（Shown in Fig. 1）, in system
Hydraulic oil flows into right control port C2 mouthfuls of two grades of outsides of 2 valve body of triple valve 20 by the B mouths of pilot valve, because right control port
C2 mouthfuls are connected by the right control port 3 on valve pocket 5 with annular groove II 4, therefore high-voltage oil liquid enters in annular groove II 4, and are made
Step surface for the right side step II 8 of valve element 7；Meanwhile, the oil return circuit in system passes through A mouthfuls and two grades triple valves of pilot valve
Left control port C1 mouthfuls of 2 are communicated, and left control port C1 mouthfuls further through the left control port 18 on valve pocket 5 and the phase of annular groove I 14
Connect, therefore the step surface of the left side step I 15 of valve element 7 is communicated with system oil return oil circuit, is low pressure.The high pressure at step II 8 of valve element 7
In the presence of low pressure at step I 15, it is moved to the left.Valve element 7 is moved to left so that the oil inlet II 16 of valve element 7 and the ring on valve pocket 5
Shape groove III 10 is connected, and system high pressure oil passes through the oil inlet I 19 on oil inlet P mouthful, valve pocket 5, annular groove III 10 and valve element 7
Oil inlet II 16 enters among the internal cavities 17 of valve element 7, and from load hydraulic fluid port D outflows, into executive component, i.e., now commutates
Valve oil inlet P mouthful is communicated for hydraulic fluid port D mouthfuls with load.
2. when pilot reversing valve is under electromagnet effect or when manually operated time is located at right position（Shown in Fig. 2）, in system
Hydraulic oil flows into left control port C1 mouthfuls of two grades of outsides of 2 valve body of triple valve 20 by the A mouths of pilot valve, because left control port
C1 mouthfuls are connected by the left control port 18 on valve pocket 5 with annular groove I 14, therefore high-voltage oil liquid enters in annular groove I 14, and are made
Step surface for the left side step I 15 of valve element 7；Meanwhile, the oil return circuit in system passes through B mouthfuls and two grades triple valves of pilot valve
Right control port C2 mouthfuls of 2 are communicated, and C2 mouthfuls of control port is connected further through the right control port 3 on valve pocket 5 with annular groove II 4,
Therefore the step surface of the right side step II 8 of valve element 7 is communicated with system oil return oil circuit, is low pressure.Valve element 7 at step I 15 high pressure with
At step II 8 in the presence of low pressure, move right.Valve element 7 is moved to right so that the oil-out II 6 of valve element 7 and the annular on valve pocket 5
Groove IV 9 is connected, now fluid from load hydraulic fluid port D mouthful flow into, into the cavity 17 of valve element 7, and by the oil-out II 6 of valve element 7,
T mouthfuls of the oil-out I 21 on annular groove IV 9, valve pocket 5 on valve pocket 5 and the oil-out on valve body 20 enter system oil return pipeline,
I.e. now reversal valve oil-out T mouthfuls communicates with loading hydraulic fluid port D mouthfuls.
Embodiment 2, Fig. 3 and Fig. 4 give the embodiment of another two grades of triple valves, and pilot valve is same with embodiment 1, no
Repeat.
In the present embodiment the annular groove IV 9 of the madial wall of valve pocket 5 be located at the right side of valve element 7 near, when valve element 7 in middle position to the left
When mobile, the right side of valve element 7 can not be completely covered by annular groove IV 9, and annular groove IV 9 is communicated with the internal cavities 17 of valve element 7；
Now valve element 7 no longer sets oil-out II 6.
The madial wall of pressure ring 13 is provided with annular groove V 22 in the present embodiment, and annular groove V 22 is provided with oil inlet III 23；Oil-feed
Mouth III 23 is communicated with the oil inlet P mouthful on valve body 20, and now valve pocket 5 no longer sets annular groove III 10 and oil inlet I 19, valve element 7
Oil inlet II 16 is also no longer set；The annular groove V 22 that the madial wall of pressure ring 13 is provided with is located near the left side of valve element 7, works as valve
Core 7 is when middle position moves right, and the left side of valve element 7 can not be completely covered by annular groove V 22, and cause annular groove V 22 and valve element 7
Internal cavities 17 are communicated.
Step is as follows when specifically used：
It is same as Example 1 that 1. valve element 7 is moved left and right process by pilot valve control, when valve element 7 is moved to left（Shown in Fig. 3）,
Valve element 7 is completely covered by annular groove V 22, and annular groove IV 9 is not completely covered by, now the oil return inlet T on valve body 20 mouthful and load oil
D mouthfuls of mouth is communicated.
2. when valve element 7 is moved to right（Shown in Fig. 4）, valve element 7 is completely covered by annular groove IV 9, and annular groove V 22 does not hide completely
Cover, now the oil inlet P on valve body 20 mouthful is communicated for hydraulic fluid port D mouthfuls with load.
Claims (6)
1. the big flow three-way switch valve of valve element hollow structure, including one-level pilot valve and two grades of triple valves, it is characterised in that：
Described pilot valve is four-way reversing valve or four-way servo valve, and it distributes the left and right control that fluid enters two grades of triple valves
Chamber, realizes the motion control to two grades of threeway valve cores；
Two grades of described triple valves include valve element, valve pocket, valve body, pressure ring and end cap；Oil inlet P mouthful is respectively equipped with the valve body
With T mouthfuls of oil-out, T mouthful of oil inlet P mouthful and oil-out are inwardly through body wall, oil inlet I and oil-out I phase corresponding with valve pocket
Logical, T mouthfuls of oil inlet P mouthful and oil-out are outwards then connected with hydraulic system high-pressure oil passage and system oil return respectively；
Left control port C1 mouthfuls and right control port C2 mouthfuls, left control port C1 mouthfuls and right control are further respectively had on the valve body
C2 mouthfuls of hydraulic fluid port inwardly runs through body wall, and the left control port corresponding with valve pocket, right control port are communicated, left control port
C1 mouthfuls and right control port C2 mouthfuls of A mouthfuls of control port outside with one-level pilot valve, B mouthfuls communicate respectively；The valve body rightmost side
Load hydraulic fluid port D is provided with, load hydraulic fluid port D is connected with valve core inside cavity；
Annular groove I, annular groove II, annular groove III and annular groove IV are respectively equipped with the valve pocket madial wall；Relative to annular groove
Ith, annular groove II, annular groove III and annular groove IV are respectively equipped with left control port, right control port, oil inlet I and oil-out I,
Outwards run through hydraulic fluid port corresponding to valve body after sleeve side wall to communicate；
The valve element is hollow type structure, and there is cylindrical cavity at center, and cavity is communicated for hydraulic fluid port D mouthfuls with load；The valve element outer wall
Coordinate with valve sleeving inner wall for gap, valve element can be slided in valve pocket；The valve element is provided with oil inlet II and oil-out II, oil inlet
II and oil-out II be inwardly connected with valve core inside cavity；The valve element oil inlet II and oil-out II are slided into suitably in valve element
During position, it can be connected respectively with the annular groove III and annular groove IV on the inside of valve pocket, but both can not be connected simultaneously, that is, work as
When valve element oil inlet II is connected with the annular groove III on the inside of valve pocket, valve element oil-out II can not connect with the annular groove IV on the inside of valve pocket
It is logical, when valve element oil-out II is connected with the annular groove IV on the inside of valve pocket, valve element oil inlet II and the annular groove III on the inside of valve pocket
It can not connect；
The valve element outer wall is provided with step I and step II, and step I and step II can limit valve core movement scope, and step I and valve
Collar-shaped groove I, valve sleeving inner wall and pressure ring-side wall form left control oil pocket, step II and valve pocket annular groove II, valve sleeving inner wall, valve pocket
Right wall forms right control oil pocket；
The pressure ring is the hollow ring concentric with valve pocket；The end cap is fixed on valve body, and pressure ring is pressed in into valve pocket
On.
2. the big flow three-way switch valve of valve element hollow structure according to claim 1, it is characterised in that：The valve element enters
Hydraulic fluid port II is circumferentially equally distributed multiple oil-through-holes, and the valve element oil-out II is circumferentially equally distributed multiple logical oil
Hole.
3. the big flow three-way switch valve of valve element hollow structure according to claim 1, it is characterised in that：The valve element is only
Provided with oil inlet II, the oil inlet II is connected when valve element slides into appropriate location with the annular groove III of valve pocket madial wall；
The annular groove IV of the valve pocket madial wall is located near valve element right side, when valve element is moved to the left in middle position, valve element right side
Annular groove IV can not be completely covered by, and annular groove IV is communicated with valve core inside cavity.
4. the big flow three-way switch valve of valve element hollow structure according to claim 1, it is characterised in that：In the pressure ring
Side wall can be provided with annular groove V, and annular groove V is provided with oil inlet III；The oil inlet III is communicated with valve body oil inlet P mouthful, this
When valve pocket annular groove III and oil inlet I be no longer set, valve element also no longer sets oil inlet II；The ring that the pressure ring madial wall is provided with
Shape groove V is located near valve element left side, and when valve element moves right in middle position, valve element left side can not be completely covered by annular groove
V, and annular groove V is communicated with valve core inside cavity.
5. the big flow three-way switch valve of valve element hollow structure according to claim 1, it is characterised in that：The oil-feed of valve body
P mouthfuls of mouth and T mouthfuls of interchanging positions of oil-out.
6. the big flow three-way switch valve of valve element hollow structure according to claim 1, it is characterised in that：Valve element oil inlet
II and oil-out II be circular hole, rectangular opening or irregularly-shaped hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610227594.9A CN105757025B (en) | 2016-04-13 | 2016-04-13 | The big flow three-way switch valve of valve element hollow structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610227594.9A CN105757025B (en) | 2016-04-13 | 2016-04-13 | The big flow three-way switch valve of valve element hollow structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105757025A CN105757025A (en) | 2016-07-13 |
| CN105757025B true CN105757025B (en) | 2017-11-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610227594.9A Active CN105757025B (en) | 2016-04-13 | 2016-04-13 | The big flow three-way switch valve of valve element hollow structure |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111959704B (en) * | 2020-08-20 | 2021-06-25 | 浙江大学 | Ocean wave compensation system of marine catch shipborne processing equipment |
| CN112922917B (en) * | 2021-03-18 | 2022-02-18 | 同济大学 | Axial flow distribution proportional servo valve |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4519420A (en) * | 1982-09-29 | 1985-05-28 | Commercial Shearing, Inc. | Hydraulic valves |
| US4664152A (en) * | 1986-04-04 | 1987-05-12 | Mara Michael R O | Flow control valve with replaceable cartridge subassembly having multi-tubular construction |
| CN2536859Y (en) * | 2002-03-10 | 2003-02-19 | 马建平 | Cock three-way valve |
| CN201599268U (en) * | 2010-02-03 | 2010-10-06 | 北京理工大学 | High speed large flow pulse valve |
| CN104295773A (en) * | 2014-08-14 | 2015-01-21 | 杭州淘米水净化科技有限公司 | Three-passageway different-quality water supply faucet |
| CN205639129U (en) * | 2016-04-13 | 2016-10-12 | 浙江大学舟山海洋研究中心 | Case hollow structure's large -traffic three -way switch valve |
-
2016
- 2016-04-13 CN CN201610227594.9A patent/CN105757025B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4519420A (en) * | 1982-09-29 | 1985-05-28 | Commercial Shearing, Inc. | Hydraulic valves |
| US4664152A (en) * | 1986-04-04 | 1987-05-12 | Mara Michael R O | Flow control valve with replaceable cartridge subassembly having multi-tubular construction |
| CN2536859Y (en) * | 2002-03-10 | 2003-02-19 | 马建平 | Cock three-way valve |
| CN201599268U (en) * | 2010-02-03 | 2010-10-06 | 北京理工大学 | High speed large flow pulse valve |
| CN104295773A (en) * | 2014-08-14 | 2015-01-21 | 杭州淘米水净化科技有限公司 | Three-passageway different-quality water supply faucet |
| CN205639129U (en) * | 2016-04-13 | 2016-10-12 | 浙江大学舟山海洋研究中心 | Case hollow structure's large -traffic three -way switch valve |
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| CN105757025A (en) | 2016-07-13 |
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