CN107859762B - The dish-type of superheated steam instantaneous sterilizing rotates valve core - Google Patents
The dish-type of superheated steam instantaneous sterilizing rotates valve core Download PDFInfo
- Publication number
- CN107859762B CN107859762B CN201711130539.9A CN201711130539A CN107859762B CN 107859762 B CN107859762 B CN 107859762B CN 201711130539 A CN201711130539 A CN 201711130539A CN 107859762 B CN107859762 B CN 107859762B
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- closing disk
- valve plate
- moving valve
- air inlet
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Classifications
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- 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
- F16K11/072—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 pivoted closure members
- F16K11/074—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 pivoted closure members with flat sealing faces
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- 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
- F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
- F16K3/02—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with flat sealing faces; Packings therefor
- F16K3/04—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with flat sealing faces; Packings therefor with pivoted closure members
- F16K3/06—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with flat sealing faces; Packings therefor with pivoted closure members in the form of closure plates arranged between supply and discharge passages
- F16K3/08—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with flat sealing faces; Packings therefor with pivoted closure members in the form of closure plates arranged between supply and discharge passages with circular plates rotatable around their centres
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- 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
- F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
- F16K3/30—Details
- F16K3/314—Forms or constructions of slides; Attachment of the slide to the spindle
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Multiple-Way Valves (AREA)
- Taps Or Cocks (AREA)
Abstract
A kind of dish-type of superheated steam instantaneous sterilizing rotates valve core, including rotary shaft, and upper closing disk, moving valve plate and lower closing disk made of wear-resistant material are successively set in rotary shaft；In use, moving valve plate is rotated with rotary shaft, upper closing disk and lower closing disk are motionless；There are the first feed opening and the first air inlet in upper closing disk；There is upper flange in upper closing disk, has feed inlet and air inlet on upper flange；Moving valve plate includes the moving valve plate ontology of annular, is provided at least one storage hole on moving valve plate ontology；Lower closing disk includes the lower closing disk ontology of annular, there is gas vent and discharge hole on lower closing disk ontology, and discharge hole and the first air inlet are coaxially disposed；Lower closing disk is equipped with lower flange on the end face of moving valve plate, and lower flange has the discharge port being connected to discharge hole on the end face of lower closing disk.Solid powder material and superheated steam can be mixed and fed into transport pipeline by the rotation valve core.
Description
Technical field
The invention belongs to solid powder superheated steam instantaneous sterilizing fields, and in particular to a kind of superheated steam instantaneous sterilizing
Dish-type rotates valve core.
Background technique
In solid powder class material sterilizing field, superheated steam instantaneous sterilizing method can it is continuous, efficiently, quickly by powder
Microorganism, worm's ovum contained in end etc. is killed.This method utilizes high temperature (153 DEG C), the mistake of high pressure (0.15~0.4MPa)
Hot steam is mixed with solid powder material, and instantaneous (4~6s) kills microorganism, the worm's ovum etc. in powder, to realize
The sterilizing of solid powder class material.As the core equipment of superheated steam instantaneous sterilizing, dish-type rotary valve main function is will to consolidate
Body powder and superheated steam are mixed, and are sent in transport pipeline.But the spool in existing rotary valve is due to structure
Form and material therefor existing defects, lead to easy condensation of water when rotary valve easily leaks, steam passes through, and cooperation tension is not when high temperature
The problems such as capable of rotating.
Summary of the invention
The object of the present invention is to provide a kind of dish-types of superheated steam instantaneous sterilizing to rotate valve core, when work, can make disk
Type rotary valve keeps enough temperature, is not easy condensation of water, and can rotate when high temperature.
To achieve the above object, the technical scheme adopted by the invention is that: a kind of dish-type rotation of superheated steam instantaneous sterilizing
Rotary valve spool, including rotary shaft are successively set in rotary shaft made of upper closing disk, wear-resistant material made of wear-resistant material and move valve
Lower closing disk made of piece and wear-resistant material；In use, moving valve plate is rotated with rotary shaft, upper closing disk and lower closing disk are fixed；
The upper closing disk includes the upper closing disk ontology of annular, be machined on upper closing disk ontology the first feed opening and first into
Stomata；Upper flange is installed, there are two connect respectively with the first feed opening and the first air inlet for processing on upper flange above upper closing disk
Logical through-hole is separately installed with feed inlet and air inlet on two through-holes；
The moving valve plate includes the moving valve plate ontology of annular, is provided at least one storage hole on moving valve plate ontology；
The lower closing disk includes the lower closing disk ontology of annular, is machined with gas vent and discharge hole on lower closing disk ontology, is arranged
Exhaust pipe is installed, discharge hole and the first air inlet are coaxially disposed in stomata；Gas vent is neither coaxially disposed with the first feed opening
Also it is not coaxially disposed with the first air inlet；
Lower closing disk is equipped with lower flange on the end face of moving valve plate, and lower flange is equipped with the connection being connected to discharge hole
Hole, lower flange are equipped with discharge port on the end face of lower closing disk, and discharge port is connected to by the intercommunicating pore with discharge hole.
The present invention, which rotates, is respectively arranged with feed inlet, air inlet and discharge port in upper closing disk and lower closing disk in valve core,
Solid powder material is entered in the storage hole of moving valve plate by feed inlet, when the storage hole of moving valve plate is rotated to air inlet position
When, air inlet, storage hole, discharge port are connected, and under steam pressure effect, solid powder material passes through discharge port with superheated steam
It enters in transport pipeline, completes the mixing and transport of solid powder material and superheated steam.The spool is as superheated steam wink
When the core equipment that sterilizes, main function is to mix solid powder material and superheated steam, and be sent into transport pipeline.
Dish-type rotation valve core mainly uses ceramic material and flat seal, and spool is enable to keep good machine in the case of a high temperature
Tool performance, to avoid the problem that other spools exist.
Detailed description of the invention
Fig. 1 is the schematic diagram of present invention rotation the first embodiment of valve core.
Fig. 2 is the top view of Fig. 1.
Fig. 3 is the bottom view of Fig. 1.
Fig. 4 is the schematic diagram of upper closing disk in rotation valve core shown in Fig. 1.
Fig. 5 is the schematic diagram of moving valve plate in rotation valve core shown in Fig. 1.
Fig. 6 is the schematic diagram of lower closing disk in rotation valve core shown in Fig. 1.
Fig. 7 is the schematic diagram of present invention rotation second of embodiment of valve core.
Fig. 8 is the top view of Fig. 7.
In figure: closing disk on 1., 2. moving valve plates, 3. lower closing disks, 4. rotary shafts, 5. exhaust pipes, 6. lower flanges, 7. sealing rings,
8. bearing, 9.O type circle, 10. feed inlets, 11. air inlets, 12. discharge ports, 13. upper flanges, 14. strainers, closing disk ontology on 15.,
16. first shaft hole, 17. first feed openings, 18. first air inlets, 19. moving valve plate ontologies, 20. second axis holes, 21. storage holes,
22. lower closing disk ontology, 23. third axis holes, 24. discharge holes, 25. gas vents.
Specific embodiment
Present invention will be further explained below with reference to the attached drawings and specific embodiments.
As shown in Figure 1, Figure 2 and Figure 3, the present invention rotates valve core, including rotary shaft 4, is successively set in rotary shaft 4
Closing disk 1, moving valve plate 2 and lower closing disk 3；
As shown in figure 4, the present invention rotates the upper closing disk 1 in valve core, and the upper closing disk ontology 15 including annular, upper closing disk sheet
The inner hole of body 15 is first shaft hole 16, is machined with the first feed opening 17 and the first air inlet 18 on upper closing disk ontology 15, first into
Material hole 17 and the first air inlet 18 penetrate through closing disk ontology 15, and the angle between the first feed opening 17 and the first air inlet 18 is big
In 90 ° less than 180 °；
Upper closing disk 1 is equipped with upper flange 13 above, is equipped with sealing ring 7 between upper flange 13 and upper closing disk 1, on upper flange 13
There are two through-hole, which is connected to the first feed opening 17 and the first air inlet 18 respectively for processing, with the on upper flange 13
Feed inlet 10 is installed on the through-hole of one feed opening 17 connection, is installed on the through-hole being connected on upper flange 13 with the first air inlet 18
Port 11；16 sets of first shaft hole in rotary shaft 4.
Such as Fig. 5, the present invention rotates the moving valve plate 2 in valve core, the moving valve plate ontology 19 including annular, moving valve plate ontology 19
Inner hole be the second axis hole 20, be provided at least one storage hole 21 on moving valve plate ontology 19；Second 20 sets of axis hole is in rotary shaft 4
On, moving valve plate 2 is fixedly connected with rotary shaft 4.
As shown in fig. 6, the present invention rotates the lower closing disk 3 in valve core, and the lower closing disk ontology 22 including annular, lower closing disk sheet
The inner hole of body 22 is third axis hole 23, and gas vent 25 and discharge hole 24 are machined on lower closing disk ontology 22, and gas vent 25 is step
Hole is relatively large in diameter hole in gas vent 25 towards moving valve plate 2, is equipped with the exhaust pipe 5 that longitudinal section is T shape, exhaust in gas vent 25
O-ring 9 is equipped between the step surface of pipe 5 and the step surface of gas vent 25；Discharge hole 24 and the first air inlet 18 are coaxially disposed；The
23 sets of Triaxial hole are connected in rotary shaft 4, but not with rotary shaft 4.Gas vent 25 is neither coaxially disposed with the first feed opening 17
Also it is not coaxially disposed with the first air inlet 18.
Lower closing disk 3 is equipped with lower flange 6 on the end face of moving valve plate 2, and lower flange 6 is equipped with to be connected to discharge hole 24
Intercommunicating pore, lower flange 6 are equipped with discharge port 12 on the end face of lower closing disk 3, pass through the intercommunicating pore inside discharge port 12 and go out
Expect that hole 24 is connected to.
Upper closing disk 1, moving valve plate 2 and lower closing disk 3 are all made of wear-resistant material and are made, the antifriction material preferred oxides ceramics
(zirconium oxide, aluminium oxide etc.), non-oxide ceramics (silicon carbide, silicon nitride etc.), mould steel, stainless steel, copper, copper alloy or copper
Graphite etc. is made.To adapt to the transport of different hardness solid powder particle, the abrasion of contact surface is reduced.
For the first embodiment rotation valve core in use, air inlet 11 is connected with jet chimney, power mechanism drives rotation
Shaft 4 rotates, and lower closing disk 3 and upper closing disk 1 are fixed, and upper closing disk 1 and lower closing disk 3 are tightly pressed against in 2 both ends of the surface of moving valve plate,
Rotary shaft 4 drives moving valve plate 2 to rotate, when the storage hole 21 on moving valve plate 2 turns under the first feed opening 17 in upper closing disk 1
Fang Shi, solid powder material are entered in storage hole 21 by feed inlet 10 due to gravity, complete the loading of material；Moving valve plate 2
It continues to rotate, when material being driven to turn to the first 18 lower section of air inlet, the storage of air inlet 11, the first air inlet 18, loaded material
Material hole 21, discharge hole 24 are connected to discharge port 12, form steam channel, and the superheated steam that jet chimney is sent out passes through air inlet 11
Into the steam channel, and the material in storage hole 21 is driven to be entered in transport pipeline by discharge port 12, completes solid powder
The mixing and transport of material and steam；Moving valve plate 2 continues to rotate, when the storage hole 21 and exhaust pipe 5 of unsnatching material on moving valve plate 2 connect
When logical, remain in the steam in storage hole 21 and be discharged outside spool by exhaust pipe 5.Because 2 rotation speed of moving valve plate is very fast, steam row
Certain negative pressure is formed in the storage hole 21 of moving valve plate 2 after out, when the storage hole 21 on moving valve plate 2 is rotated again to feed inlet
When 10 lower section, which facilitates the loading of solid powder material.When rotary shaft 4 drive 2 continuous rotation of moving valve plate when, it can be achieved that
The continuous loading of solid powder material and mixing and transport with superheated steam.
In order to widely be applied to different solid powder materials, the present invention also provides as shown in Figure 7 and Figure 8 the
Two kinds of embodiments, the structure of second of embodiment and the structure of the first embodiment are essentially identical, and difference between the two exists
In: in second of embodiment, moving valve plate 2 is fluted towards processing on the end face of lower closing disk 3, and strainer 14 is equipped in the groove,
Strainer 14 covers all storage holes 21 towards the aperture of lower closing disk 3；Meanwhile by Fig. 1 air inlet 11 and discharge port 12 carry out
It exchanges, i.e. the discharge port 12 for being mounted on upper flange 13 and being connected to the first air inlet 18 in second of embodiment is mounted on down
What is be connected on flange 6 and with discharge hole 24 is air inlet 11.
Second of rotation valve core is in use, air inlet 11 is connected with jet chimney.Upper closing disk 1 and lower closing disk 3 are tightly
It is pressed in 2 both ends of the surface of moving valve plate；Rotary shaft 4 drives moving valve plate 2 to rotate, and upper closing disk 1 and lower closing disk 3 are fixed, when dynamic valve
When storage hole 21 on piece 2 turns to the first 17 lower section of feed opening, solid powder material is due to gravity by the first feed opening 17
It enters in storage hole 21, completes the loading of material；Moving valve plate 2 continues to rotate, and material is driven to turn under the first air inlet 18
Fang Shi, discharge port 12, the first air inlet 18, the storage hole 21 of loaded material, discharge hole 24 are connected to air inlet 11, form gas
Channel, the superheated steam in jet chimney enter the gas passage, and pass through strainer 14 and solid powder material is driven to pass through the gas
Body channel enters in transport pipeline, completes the mixing and transport of solid powder and steam；Moving valve plate 2 continues to rotate, when moving valve plate 2
On when unsnatching the storage hole of material and turning to lower 5 top of exhaust pipe, the steam remained in storage hole 21 is drained into outer by exhaust pipe 5
Boundary.Because 2 rotation speed of moving valve plate is very fast, steam discharge after certain negative pressure is formed in storage hole 21, when storage hole 21 again
When rotation to 10 lower section of feed inlet, which facilitates the loading of material.It, can when rotary shaft 4 drives 2 continuous rotation of moving valve plate
It is the continuous loading for realizing solid powder material and mixing and transport with superheated steam.Strainer 14 can prevent in storage hole 21
The material of loading is fallen into jet chimney downwards.
Because the granularity of solid powder varies, moving valve plate 2 is driven in powder material rotary course, to keep the close of spool
Seal effect, it is desirable that the solid particle of minimum diameter cannot enter in the contact surface of closing disk 1 and moving valve plate 2, can not enter
In the contact surface of lower closing disk 3 and moving valve plate 2, to prevent from destroying sealing surface, therefore the contact surface of upper closing disk 1 and moving valve plate 2, lower closing disk
3 with the flatnesses of 2 both ends of the surface of contact surface and moving valve plate of moving valve plate 2≤2.5 μm, roughness≤0.2 μm.Present invention rotation
Valve core allows the smallest particle diameter to be 5 microns.
Claims (5)
1. a kind of dish-type of superheated steam instantaneous sterilizing rotates valve core, including rotary shaft (4), which is characterized in that rotary shaft (4)
On be successively set with made of wear-resistant material moving valve plate (2) made of closing disk (1), wear-resistant material and wear-resistant material it is manufactured under
Closing disk (3)；In use, moving valve plate (2) is rotated with rotary shaft (4), upper closing disk (1) and lower closing disk (3) are fixed；
The upper closing disk (1) includes the upper closing disk ontology (15) of annular, is machined with the first feed opening on upper closing disk ontology (15)
(17) and the first air inlet (18)；Upper closing disk (1) is equipped with upper flange (13) above, and there are two respectively for processing on upper flange (13)
The through-hole being connected to the first feed opening (17) and the first air inlet (18), be separately installed on two through-holes feed inlet (10) and
Air inlet (11)；
The moving valve plate (2) includes the moving valve plate ontology (19) of annular, and moving valve plate ontology is provided at least one storage on (19)
Expect hole (21)；
The lower closing disk (3) includes the lower closing disk ontology (22) of annular, is machined with gas vent (25) on lower closing disk ontology (22)
With discharge hole (24), gas vent (25) is interior to be equipped with exhaust pipe (5), and discharge hole (24) and the first air inlet (18) are coaxially disposed；
Gas vent (25) is neither coaxially disposed with the first feed opening (17) nor is coaxially disposed with the first air inlet (18)；
Lower closing disk (3) is equipped with lower flange (6) on the end face of moving valve plate (2), and lower flange (6) is equipped with and discharge hole (24)
The intercommunicating pore of connection, lower flange (6) are equipped with discharge port (12) on the end face of lower closing disk (3), and discharge port (12) is by being somebody's turn to do
Intercommunicating pore is connected to discharge hole (24).
2. the dish-type of superheated steam instantaneous sterilizing according to claim 1 rotates valve core, which is characterized in that the row
Stomata (25) is stepped hole, hole is relatively large in diameter in gas vent (25) towards moving valve plate (2), the longitudinal section of the exhaust pipe (5) is T
Shape is equipped with O-ring (9) between the step surface of exhaust pipe (5) and the step surface of gas vent (25).
3. a kind of dish-type of superheated steam instantaneous sterilizing rotates valve core, including rotary shaft (4), which is characterized in that rotary shaft (4)
On be successively set with made of wear-resistant material moving valve plate (2) made of closing disk (1), wear-resistant material and wear-resistant material it is manufactured under
Closing disk (3)；In use, moving valve plate (2) is rotated with rotary shaft (4), upper closing disk (1) and lower closing disk (3) are fixed；
The upper closing disk (1) includes the upper closing disk ontology (15) of annular, is machined with the first feed opening on upper closing disk ontology (15)
(17) and the first air inlet (18)；Upper closing disk (1) is equipped with upper flange (13) above, and there are two respectively for processing on upper flange (13)
The through-hole being connected to the first feed opening (17) and the first air inlet (18), be separately installed on two through-holes feed inlet (10) and
Discharge port (12)；
The moving valve plate (2) includes the moving valve plate ontology (19) of annular, and moving valve plate ontology is provided at least one storage on (19)
Expect hole (21), moving valve plate (2) is fluted towards processing on the end face of lower closing disk (3), and strainer (14), strainer are equipped in the groove
(14) aperture of all storage holes (21) towards lower closing disk (3) is covered；
The lower closing disk (3) includes the lower closing disk ontology (22) of annular, is machined with gas vent (25) on lower closing disk ontology (22)
With discharge hole (24), gas vent (25) is interior to be equipped with exhaust pipe (5), and discharge hole (24) and the first air inlet (18) are coaxially disposed；
Gas vent (25) is neither coaxially disposed with the first feed opening (17) nor is coaxially disposed with the first air inlet (18)；
Lower closing disk (3) is equipped with lower flange (6) on the end face of moving valve plate (2), and lower flange (6) is equipped with and discharge hole (24)
The intercommunicating pore of connection, lower flange (6) are equipped with air inlet (11) on the end face of lower closing disk (3), and air inlet (11) is by being somebody's turn to do
Intercommunicating pore is connected to discharge hole (24).
4. the dish-type of superheated steam instantaneous sterilizing according to claim 1 or 3 rotates valve core, which is characterized in that described
Wear-resistant material be oxide ceramics, non-oxide ceramics, mould steel, stainless steel, copper, copper alloy or copper graphite.
5. the dish-type of superheated steam instantaneous sterilizing according to claim 1 or 3 rotates valve core, which is characterized in that described
Upper closing disk (1) and the contact surface of moving valve plate (2), lower closing disk (3) and moving valve plate (2) contact surface and moving valve plate (2) both ends
The flatness in face≤2.5 μm, roughness≤0.2 μm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711130539.9A CN107859762B (en) | 2017-11-15 | 2017-11-15 | The dish-type of superheated steam instantaneous sterilizing rotates valve core |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711130539.9A CN107859762B (en) | 2017-11-15 | 2017-11-15 | The dish-type of superheated steam instantaneous sterilizing rotates valve core |
Publications (2)
| Publication Number | Publication Date |
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| CN107859762A CN107859762A (en) | 2018-03-30 |
| CN107859762B true CN107859762B (en) | 2019-06-11 |
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| CN201711130539.9A Active CN107859762B (en) | 2017-11-15 | 2017-11-15 | The dish-type of superheated steam instantaneous sterilizing rotates valve core |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111205117B (en) * | 2020-02-18 | 2022-02-08 | 重庆亿创西北工业技术研究院有限公司 | Sealed feeding equipment based on new forms of energy methane-generating pit |
| CN112361024B (en) * | 2020-11-25 | 2021-07-13 | 浙江石化阀门有限公司 | High-temperature quick-opening spherical sealing cut-off valve |
| CN112361025B (en) * | 2020-11-25 | 2021-08-06 | 浙江石化阀门有限公司 | Quick opening mechanism of quick opening high-temperature spherical sealing cut-off valve |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003314717A (en) * | 2002-04-24 | 2003-11-06 | Jiyopuratsukusu Kk | Fluid switch |
| JP4800071B2 (en) * | 2005-06-02 | 2011-10-26 | 株式会社クレハ | Rotary switching valve, switching valve device, filling packaging body manufacturing apparatus, and filling packaging body manufacturing method |
| ES2329611T3 (en) * | 2005-07-01 | 2009-11-27 | Medmix Systems Ag | MULTIPLE COMPONENT DISPENSER DEVICE WITH A VALVE ASSEMBLY. |
| CN101732738B (en) * | 2010-01-07 | 2012-09-05 | 西藏奇正藏药股份有限公司 | Steam sterilizing device of crude drug of Tibetan medicine |
| CN102563122B (en) * | 2011-12-09 | 2013-11-20 | 杭州水处理技术研究开发中心有限公司 | Continuously switchable four-way rotary valve |
| CN106224580A (en) * | 2016-08-11 | 2016-12-14 | 青岛大学 | Two-position three-way rotary disc type reversing valve |
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