CN109224515A - A kind of biochemical industry liquid centrifugal extractor separating barrel with density valve - Google Patents
A kind of biochemical industry liquid centrifugal extractor separating barrel with density valve Download PDFInfo
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- CN109224515A CN109224515A CN201811211071.0A CN201811211071A CN109224515A CN 109224515 A CN109224515 A CN 109224515A CN 201811211071 A CN201811211071 A CN 201811211071A CN 109224515 A CN109224515 A CN 109224515A
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- density
- low
- valve
- high density
- liquid
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D11/00—Solvent extraction
- B01D11/04—Solvent extraction of solutions which are liquid
- B01D11/0476—Moving receptacles, e.g. rotating receptacles
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Extraction Or Liquid Replacement (AREA)
- Centrifugal Separators (AREA)
Abstract
The invention discloses a kind of biochemical industry liquid centrifugal extractor separating barrel with density valve, including the staving with bucket chamber, the bucket chamber is equipped with high density valve chamber, low-density valve chamber, the high density sliding valve as valve, low-density sliding valve are respectively equipped in high density valve chamber, low-density valve chamber, liquid receptacle is equipped with low-density storage chamber, high density storage chamber.When use, the liquid extracted will be needed to continue bucket chamber to supply, driving staving is rotated around vertical axes with rate of extraction, to allow mixing liquid to have enough extraction times, after mixing liquid separation, improve the revolving speed of staving, utilize centrifugal force, low-density sliding valve, high density sliding valve is allowed to move outward, to allow low-density liquid-conveying ducts, high density liquid-conveying ducts to be connected to cavity, it allows two kinds of liquid to flow out respectively from low-density liquid-conveying ducts, high density liquid-conveying ducts and flows out respectively, and the setting of liquid-passing hole, the moving resistance of low-density sliding valve can be reduced.
Description
Technical field
The present invention relates to biofluid, industrial chemicals Preparation equipment field, in particular to a kind of biologies with density valve
Chemical liquid centrifugal extractor separating barrel.
Background technique
Centrifugal extractor is a kind of fast and efficiently extraction equipment.
Its principle is that staving is allowed to carry out high speed rotation, and the liquid for making density big is mobile toward bucket wall, and low density liquid stays
In the central area of bucket, to realize the layering of two kinds of liquid, discharge.Once but staving stops rotating or rotation speed drop
It is low, it will lead to two kinds of liquid and mix again.Moreover, two kinds of liquid are often difficult to the presence of apparent boundary, just it is difficult to two kinds not
It is extracted with liquid, and must also allow staving to continue to keep high speed rotation in extraction process, result in additional energy consumption.
Summary of the invention
The technical problem to be solved by the present invention is providing a kind of biochemical industry liquid centrifugal extractor with density valve point
From bucket.
The solution that the present invention solves its technical problem is:
A kind of biochemical industry liquid centrifugal extractor separating barrel with density valve, including the bucket being laterally arranged with bucket chamber
Body, the outside bottom surface of bucket chamber are equipped with the high density valve chamber crossed out, slide in high density valve chamber equipped with removable high density
Valve, high density valve chamber are equipped with the high density liquid-conveying ducts that Open Side Down, are equipped with the high density being laterally arranged in high density sliding valve
Main channel, vertically arranged high density export channel, and high density main channel is connected to the bucket chamber of staving, high density export channel,
High density main channel is interconnected, and high density reset spring is equipped in high density valve chamber, and high density reset spring is located at high density
Between outside bottom surface and high density the sliding valve of valve chamber, so that high density export channel and height when high density sliding valve moves outward
The connection of density liquid-conveying ducts；The downside cavity wall of the bucket chamber is equipped with low-density valve chamber, equipped with removable low in low-density valve chamber
Density slides valve, and low-density valve chamber is equipped with the low-density liquid-conveying ducts that Open Side Down, and low-density, which slides, is equipped with laterally setting in valve
Low-density main channel, vertically arranged low-density export channel, low-density main channel is connected to the bucket chamber of staving, and low-density is led
Channel, low-density main channel are interconnected out, and low-density reset spring is equipped in low-density valve chamber, and low-density reset spring is located at
Between outside bottom surface and low-density the sliding valve of low-density valve chamber, so that low-density export is logical when low-density sliding valve moves outward
Road is connected to low-density liquid-conveying ducts, and the outside bottom surface of low-density valve chamber is equipped with liquid-passing hole；The density of low-density sliding valve is less than
The density of high density sliding valve.
As a further improvement of the foregoing solution, low-density sliding valve, high density sliding valve on be all provided with there are two interval set
The sealing ring set, low-density slides the position of two sealing rings on valve, spacing is adapted with the position of low-density liquid-conveying ducts,
So that staving is under static state, the entrance of low-density liquid-conveying ducts is located between two sealing rings；High density slides on valve
The position of two sealing rings, spacing are adapted with the position of high density liquid-conveying ducts, so that staving is under static state, high density
The entrance of liquid-conveying ducts is located between two sealing rings.
As a further improvement of the foregoing solution, the outside of high density valve chamber is equipped with hole for back flow, hole for back flow and the bucket chamber
It is connected with liquid back pipe, so that high density valve chamber is connected to bucket chamber.
As a further improvement of the foregoing solution, staving includes bung, the ladle body positioned at outside positioned inside, bung with
The removable connection of ladle body, interconnecting piece are located on the medial surface of bung.
As a further improvement of the foregoing solution, bung is threadedly coupled with ladle body.
The beneficial effects of the present invention are: a kind of biochemical industry liquid centrifugal extractor separating barrel with density valve, including
The staving being laterally arranged with bucket chamber, the outside bottom surface of bucket chamber are equipped with the high density valve chamber crossed out, high density valve chamber
Interior to slide valve equipped with removable high density, high density valve chamber is equipped with the high density liquid-conveying ducts that Open Side Down, and high density slides valve
The interior high density export channel equipped with the high density main channel being laterally arranged, vertically arranged, the bucket of high density main channel and staving
Chamber connection, high density export channel, high density main channel and are interconnected, and high density reset spring is equipped in high density valve chamber, high
Density reset spring is located between the outside bottom surface of high density valve chamber and high density sliding valve, so that high density sliding valve moves outward
High density export channel is connected to high density liquid-conveying ducts when dynamic；The downside cavity wall of the bucket chamber is equipped with low-density valve chamber, low
Valve is slid equipped with removable low-density in density valve chamber, low-density valve chamber is equipped with the low-density liquid-conveying ducts that Open Side Down, low close
Be equipped with the low-density main channel being laterally arranged, vertically arranged low-density export channel in degree sliding valve, low-density main channel with
The bucket chamber of staving is connected to, and low-density exports channel, low-density main channel and is interconnected, and low-density is equipped in low-density valve chamber and is resetted
Spring, low-density reset spring is located between the outside bottom surface of low-density valve chamber and low-density sliding valve, so that low-density slides
Low-density export channel is connected to low-density liquid-conveying ducts when valve moves outward, and the outside bottom surface of low-density valve chamber is equipped with logical liquid
Hole；The density that low-density slides valve is less than the density of high density sliding valve.In use, will need the liquid that extracts continue bucket chamber into
Row supply, driving staving are rotated around vertical axes with rate of extraction, and the valve of low-density sliding at this time, high density sliding valve move outward
Dynamic distance is small, so low-density exports between channel and low-density liquid-conveying ducts, high density exports channel and high density drain
It is not connected between channel, so that mixing liquid be allowed to have enough extraction times, after mixing liquid separation, improves turning for staving
Speed allows low-density sliding valve, high density sliding valve to move outward, so that low-density liquid-conveying ducts, high density be allowed to lead using centrifugal force
Liquid channel is connected to cavity, is allowed two kinds of liquid to flow out respectively from low-density liquid-conveying ducts, high density liquid-conveying ducts and is flowed out respectively,
And the setting of liquid-passing hole, the moving resistance of low-density sliding valve can be reduced.The present invention is used for centrifugal extractor.
Detailed description of the invention
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly described.Obviously, described attached drawing is a part of the embodiments of the present invention, rather than is all implemented
Example, those skilled in the art without creative efforts, can also be obtained according to these attached drawings other designs
Scheme and attached drawing.
Fig. 1 is the structural schematic diagram for the embodiment that the present invention is applied to density valve biochemical industry liquid extraction machine；
Fig. 2 is the partial structural diagram for the embodiment that the present invention is applied to density valve biochemical industry liquid extraction machine.
Specific embodiment
It is carried out below with reference to technical effect of the embodiment and attached drawing to design of the invention, specific structure and generation clear
Chu is fully described by, to be completely understood by the purpose of the present invention, feature and effect.Obviously, described embodiment is this hair
Bright a part of the embodiment, rather than whole embodiments, based on the embodiment of the present invention, those skilled in the art are not being paid
Other embodiments obtained, belong to the scope of protection of the invention under the premise of creative work.In addition, be previously mentioned in text
All connection/connection relationships not singly refer to that component directly connects, and referring to can be added deduct according to specific implementation situation by adding
Few couple auxiliary, to form more preferably coupling structure.Each technical characteristic in the present invention, in the premise of not conflicting conflict
Under can be with combination of interactions.
Referring to Figures 1 and 2, this is the embodiment of the present invention, specifically:
A kind of density valve biochemical industry liquid extraction machine, including the tubular centrifugal shaft 1 with upward opening being vertically arranged,
Further include liquid receptacle, be fixedly connected on centrifugal shaft 1 the biochemical industry liquid with density valve that at least two are laterally arranged from
Heart extracter separating barrel, the biochemical industry liquid centrifugal extractor separating barrel with density valve is around axis of centrifugal shaft 1 etc. across angle
Annular is laid, and the biochemical industry liquid centrifugal extractor separating barrel with density valve includes columnar staving 31, staving 31 it is interior
It is equipped with interconnecting piece 311 outside side, is equipped with infusion channel 3111 in interconnecting piece 311, interconnecting piece 311 is connect with centrifugal shaft 1, and infusion is logical
Road 3111 is connected to the barrel chamber of centrifugal shaft 1 and the bucket chamber of staving 31, and the outside bottom surface of the bucket chamber is highly dense equipped with crossing out
Bottom valve chamber 61, high density valve chamber 61 is interior to slide valve 62 equipped with removable high density, and high density valve chamber 61 is equipped with the height that Open Side Down
Density liquid-conveying ducts 63, high density sliding valve 62 is interior to be equipped with the high density main channel 64 being laterally arranged, vertically arranged high density
Channel 65 is exported, high density main channel 64 is connected to the bucket chamber of staving 31, and high density exports channel 65,64 phase of high density main channel
It is intercommunicated, high density reset spring 66 is equipped in high density valve chamber 61, high density reset spring 66 is located at high density valve chamber 61
Between outside bottom surface and high density sliding valve 62, so that high density export channel 65 and height when high density sliding valve 62 moves outward
Density liquid-conveying ducts 63 are connected to；The downside cavity wall of the bucket chamber is equipped with low-density valve chamber 51, and being equipped in low-density valve chamber 51 can
The low-density sliding valve 52 torn open, low-density valve chamber 51 are equipped with the low-density liquid-conveying ducts 53 that Open Side Down, and low-density slides valve 52
The interior low-density export channel 55 equipped with the low-density main channel 54 being laterally arranged, vertically arranged, low-density main channel 54 and bucket
The bucket chamber of body 31 is connected to, and low-density exports channel 55, low-density main channel 54 and is interconnected, and is equipped in low-density valve chamber 51 low close
Reset spring 56 is spent, low-density reset spring 56 is located between the outside bottom surface of low-density valve chamber 51 and low-density sliding valve 52,
So that low-density export channel 55 is connected to low-density liquid-conveying ducts 53 when low-density sliding valve 52 moves outward, low-density valve chamber
51 outside bottom surface is equipped with liquid-passing hole 57；Liquid receptacle is equipped with low-density storage chamber, high density storage chamber, on low-density storage chamber
Low-density liquid receiving port 81 equipped with annular, high density storage chamber are equipped with the high density liquid receiving port 82 of annular, and high density drain is logical
The opening in road 63 is located in high density liquid receiving port 82, and the opening of low-density liquid-conveying ducts 53 is located in low-density liquid receiving port 81；Bucket
The sliding branch structure connection of upside outer wall of the downside outer wall and liquid receptacle of body 31, sliding branch structure includes being located at being located at for outside to connect liquid
Perpendicular baffle 71 outside the device of outer wall on the upside of device, the upside that device erects baffle 71 outside are equipped with device pressing plate 72, and the lower section of device pressing plate 72 is equipped with two
A ball layer, each ball layer include the ball 73 that several lay around 1 annular array of centrifugal shaft, the inside of perpendicular baffle 71 outside device
Equipped with baffle 74 is erected in device, underlying ball layer, which is located in device, to be erected outside baffle 74 and device between perpendicular baffle 71, staving 31
Downside outer wall is equipped with bucket riser 75, and the ball layer being located above is located at outside barrel riser 75 and device between perpendicular baffle 71, bucket riser
75 lower end is equipped with bucket transverse slat 76, and bucket transverse slat 76 is located between described two ball layers.In use, the liquid extracted will be needed to hold
Continue and supplied to centrifugal shaft, it is intracavitary that liquid can enter bucket by infusion channel, starts driving motor, allow staving around centrifugal shaft with
Rate of extraction is rotated, and the distance that the valve of low-density sliding at this time, high density sliding valve move outward is small, so low-density exports
It is not connected between channel and low-density liquid-conveying ducts, between high density export channel and high density liquid-conveying ducts, to allow mixing
Liquid has enough extraction times, after mixing liquid separation, improves the revolving speed of staving, using centrifugal force, low-density is allowed to slide
Valve, high density sliding valve move outward, so that low-density liquid-conveying ducts, high density liquid-conveying ducts be allowed to be connected to cavity, allow two kinds of liquid
Body flows out from low-density liquid-conveying ducts, high density liquid-conveying ducts respectively and respectively enters low-density storage chamber, high density storage chamber,
And the setting of liquid-passing hole, the moving resistance of low-density sliding valve can be reduced, while can allow the mixing liquid in low-density valve chamber
Discharge.The sliding underlying ball layer of branch structure can support staving well, and interconnecting piece can also be prevented to be broken and lead to staving
It throws away.By the rotation speed of adjusting staving, the shift position of low-density sliding valve, high density sliding valve can control in this way,
To the rate of outflow of two kinds of liquid of control, after two kinds of liquid slowly flow out, and there is new mixing liquid to supplement from centrifugal shaft,
To realize continuous production, and the cavity wall of high density valve chamber, low-density valve chamber can prevent new mixing liquid from following two respectively
Kind liquid outflow.The lower end of centrifugal shaft 1 is connected with driving motor 2, the setting coaxial with centrifugal shaft 1 of the shaft of driving motor 2, driving
The shaft of motor 2 is connect with centrifugal shaft 1, and infusion channel 3111 is located at low-density sliding valve 52 and/or high density slides valve 62
Top.The lower end of centrifugal shaft 1 is connected with driving motor 2, the setting coaxial with centrifugal shaft 1 of the shaft of driving motor 2, driving motor 2
Shaft connect with centrifugal shaft 1, infusion channel 3111 be located at low-density sliding valve 52 and/or high density sliding valve 62 top.
Staving includes bung, the ladle body positioned at outside positioned inside, bung and the removable connection of ladle body, and interconnecting piece is located at
On the medial surface of bung.
Bung is threadedly coupled with ladle body.
The downside end face of centrifugal shaft 1 is connected with thrust bearing, thrust bearing, the coaxial setting of centrifugal shaft 1, thrust bearing it is upper
Thrust washer is fixedly connected with the downside end face of centrifugal shaft, the lower thrust washer of thrust bearing and the fixed company of the ontology of driving motor
It connects, meanwhile, lower thrust washer and the ground of thrust bearing are fixed.Such connection structure can well prop up centrifugal shaft
Support, and centrifugal shaft can effectively be avoided to swing in rotation.
Above-mentioned mixing liquid is mixed by lower first liquid of density and the higher second liquid of density, low-density
The density for sliding valve 52 is greater than the density of the first liquid, and allows the density of high density sliding valve 62 greater than the density of second liquid,
And the density of low-density sliding valve 52 is allowed to be less than the density that high density slides valve 62.Since low-density sliding valve 52, high density are sliding
It is removable to move valve 62, so high density reset spring and low-density reset spring need not be replaced, and high density reset spring and low close
The spring ratio for spending reset spring can be identical, only replaces different low-density sliding valves 52, high density sliding valve 62, energy
The extraction of different mixing liquids is adapted to, improves the adaptability of the invention to different mixing liquids, maintenance convenience in this way.
In order to reinforce sealing, it is all provided on low-density sliding valve 52, high density sliding valve 62 there are two spaced sealing
Circle 50, low-density slides the position of two sealing rings 50 on valve 52, spacing is adapted with the position of low-density liquid-conveying ducts 53,
So that staving 31 is under static state, the entrance of low-density liquid-conveying ducts 53 is located between two sealing rings 50；High density sliding
The position of two sealing rings 50 on valve 62, spacing are adapted with the position of high density liquid-conveying ducts 63, so that staving 31 is quiet
Only under state, the entrance of high density liquid-conveying ducts 63 is located between two sealing rings 50.
In order to reduce the moving resistance of high density sliding valve, the outside of high density valve chamber 61 is equipped with hole for back flow 67, hole for back flow
67 connect with the bucket chamber liquid back pipe 68, so that high density valve chamber 61 is connected to bucket chamber, the setting of hole for back flow 67 can also will be mixed
High density valve chamber can be smoothly discharged by closing liquid.
The barrel chamber cavity wall of centrifugal shaft 1 is equipped with and pours into mouth 11, pours into mouth 11 and is connected to infusion channel 3111, centrifugal shaft 1
Sealing tube 7 is equipped in barrel chamber, the length of sealing tube 7 is greater than the depth of the barrel chamber of centrifugal shaft 1, and the upper end of sealing tube 7 is located at described
The top of barrel chamber, sealing tube 7 slide up and down in the barrel chamber of centrifugal shaft 1, and the travel path of the lower end of sealing tube 7 pours into mouth 11.
When just filling the liquid for needing to extract in separating barrel, preferably separating barrel is allowed to be isolated with centrifugal shaft, due to there is gravity
Effect, sealing tube moves down, so that allowing sealing tube to block pours into mouth, enters to reduce the mixing liquid that new needs extract
Separating barrel, the liquid for allowing the needs in separating barrel to extract so are quickly and effectively separated, in separating barrel to just filling needs
After the liquid of extraction realizes layering, sealing tube is up moved, the bucket chamber for pouring into mouth and separating barrel is allowed directly to penetrate through, such first
Liquid and the every outflow of second liquid, just having new a small amount of mixing liquid to fill into, bucket is intracavitary, and a small amount of liquid will not influence
The purity of first liquid and second liquid is also able to achieve the separation of rapidly mixing liquid.
For the ease of lifting sealing tube, the upper end of sealing tube 7, which is cased with, is turned up bearing 710, the height-regulating bearing 710
For deep groove ball bearing, the inner ring that bearing 710 is turned up is fixedly connected with sealing tube 7.When needing to lift sealing tube, elevating mechanism is allowed
Or manipulator is connect with the outer ring that bearing is turned up, and is then up moved, so that sealing tube be allowed to lift, allows to pour into mouth exposed in barrel chamber
It is interior.
Bearing is turned up for the ease of fixed, the upper end of sealing tube 7 is also cased with upper press ring 720, lower filler ring 730, and bearing is turned up
710 inner ring is located between upper press ring 720, lower filler ring 730.
The upper press ring 720 of the present embodiment and the removable connection of sealing tube 7, lower filler ring 730 are fixedly connected with sealing tube 7.On
Pressure ring 720 is threadedly coupled with sealing tube 7.
Better embodiment of the invention is illustrated above, but the present invention is not limited to the embodiment,
Those skilled in the art can also make various equivalent modifications or replacement on the premise of without prejudice to spirit of the invention, this
Equivalent variation or replacement are all included in the scope defined by the claims of the present application a bit.
Claims (5)
1. a kind of biochemical industry liquid centrifugal extractor separating barrel with density valve, including the bucket being laterally arranged with bucket chamber
Body (31), it is characterised in that: the outside bottom surface of bucket chamber is equipped with the high density valve chamber (61) crossed out, high density valve chamber (61)
Interior to slide valve (62) equipped with removable high density, high density valve chamber (61) is equipped with the high density liquid-conveying ducts (63) that Open Side Down,
The high density main channel (64) being laterally arranged, vertically arranged high density export channel are equipped in high density sliding valve (62)
(65), high density main channel (64) are connected to the bucket chamber of staving (31), and high density exports channel (65), high density main channel (64)
It is interconnected, is equipped with high density reset spring (66) in high density valve chamber (61), high density reset spring (66) is located at high density
Between outside bottom surface and the high density sliding valve (62) of valve chamber (61), so that high density when high density sliding valve (62) is moved outward
Export channel (65) is connected to high density liquid-conveying ducts (63)；
The downside cavity wall of the bucket chamber is equipped with low-density valve chamber (51), sliding equipped with removable low-density in low-density valve chamber (51)
It moves valve (52), low-density valve chamber (51) is equipped with the low-density liquid-conveying ducts (53) that Open Side Down, sets in low-density sliding valve (52)
Have a low-density main channel (54) being laterally arranged, vertically arranged low-density export channel (55), low-density main channel (54) with
The bucket chamber of staving (31) is connected to, and low-density exports channel (55), low-density main channel (54) are interconnected, low-density valve chamber (51)
It is interior to be equipped with low-density reset spring (56), low-density reset spring (56) be located at the outside bottom surface of low-density valve chamber (51) with it is low close
Between degree sliding valve (52), so that low-density export channel (55) and low-density drain when low-density sliding valve (52) is moved outward
The outside bottom surface of channel (53) connection, low-density valve chamber (51) is equipped with liquid-passing hole (57)；The density that low-density slides valve (52) is small
In the density of high density sliding valve (62).
2. a kind of biochemical industry liquid centrifugal extractor separating barrel with density valve according to claim 1, feature
It is: there are two being all provided in low-density sliding valve (52), high density sliding valve (62) spaced sealing ring (50), low-density
The position of two sealing rings (50) in sliding valve (52), spacing are adapted with the position of low-density liquid-conveying ducts (53), so that
Under static state, the entrance of low-density liquid-conveying ducts (53) is located between two sealing rings (50) staving (31)；High density is sliding
The position for two sealing rings (50) moved on valve (62), spacing are adapted with the position of high density liquid-conveying ducts (63), so that bucket
Under static state, the entrance of high density liquid-conveying ducts (63) is located between two sealing rings (50) body (31).
3. a kind of biochemical industry liquid centrifugal extractor separating barrel with density valve according to claim 1, feature
Be: the outside of high density valve chamber (61) is equipped with hole for back flow (67), and hole for back flow (67) is connect with the bucket chamber with liquid back pipe (68),
So that high density valve chamber (61) is connected to bucket chamber.
4. a kind of biochemical industry liquid centrifugal extractor separating barrel with density valve according to claim 1, feature
Be: staving (31) includes bung, the ladle body positioned at outside positioned inside, bung and the removable connection of ladle body, interconnecting piece
(311) it is located on the medial surface of bung.
5. a kind of biochemical industry liquid centrifugal extractor separating barrel with density valve according to claim 4, feature
Be: bung is threadedly coupled with ladle body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811211071.0A CN109224515A (en) | 2018-10-17 | 2018-10-17 | A kind of biochemical industry liquid centrifugal extractor separating barrel with density valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811211071.0A CN109224515A (en) | 2018-10-17 | 2018-10-17 | A kind of biochemical industry liquid centrifugal extractor separating barrel with density valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109224515A true CN109224515A (en) | 2019-01-18 |
Family
ID=65053444
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811211071.0A Withdrawn CN109224515A (en) | 2018-10-17 | 2018-10-17 | A kind of biochemical industry liquid centrifugal extractor separating barrel with density valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109224515A (en) |
-
2018
- 2018-10-17 CN CN201811211071.0A patent/CN109224515A/en not_active Withdrawn
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Application publication date: 20190118 |