CN106421943B - Depression drainage device - Google Patents
Depression drainage device Download PDFInfo
- Publication number
- CN106421943B CN106421943B CN201610997009.3A CN201610997009A CN106421943B CN 106421943 B CN106421943 B CN 106421943B CN 201610997009 A CN201610997009 A CN 201610997009A CN 106421943 B CN106421943 B CN 106421943B
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- CN
- China
- Prior art keywords
- tapping
- feed liquor
- valve
- negative pressure
- pressure ball
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- A61M1/0023—
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M1/00—Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
- A61M1/71—Suction drainage systems
- A61M1/74—Suction control
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M39/00—Tubes, tube connectors, tube couplings, valves, access sites or the like, specially adapted for medical use
- A61M39/22—Valves or arrangement of valves
- A61M39/24—Check- or non-return valves
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M2202/00—Special media to be introduced, removed or treated
- A61M2202/04—Liquids
Abstract
The invention discloses a kind of depression drainage devices, including negative pressure ball, the negative pressure ball includes liquid feeding end and tapping end, the liquid feeding end of the negative pressure ball is equipped with drainage tube, the tapping end of the negative pressure ball is equipped with liquid discharging tube, the drainage tube is equipped with the feed liquor check valve realized by drainage tube to negative pressure ball one-way conduction, and the liquid discharging tube is equipped with the tapping check valve realized by negative pressure ball to liquid discharging tube one-way conduction.Known to through the above scheme, negative pressure ball generates lasting vacuum suction, and feed liquor check valve is arranged in timely, efficient, the lasting drainage of energy at drainage tube, realize the one-way conduction by drainage tube to negative pressure ball, drainage-fluid adverse current is prevented, the adverse current of drainage-fluid is effectively prevent to infect, tapping check valve is set on liquid discharging tube, manual switch is substituted with tapping check valve, in drainage or tapping, without manually controlling on or off, operation is simplified.
Description
Technical field
The present invention relates to medical apparatus technical field, especially a kind of depression drainage device.
Background technology
There are many surgical drainage tube type clinically applied, and some is for wound, abdominal cavity, gastrointestinal tract, biliary tract etc..After operation
It is drained, primarily to time cavity gap dropsy after operation or wound exudate are directed in vitro, prevent postoperative infection and influence to hinder
Mouth healing, during drainage, hydrops is needed to continue, effectively be drained, and to prevent drainage-fluid adverse current, causes to infect,
Therefore depression drainage device is widely used.
General depression drainage device, including negative pressure ball, drainage tube, liquid discharging tube, negative pressure ball respectively with drainage tube and liquid discharging tube
Conducting is equipped with the check valve for preventing drainage-fluid adverse current between drainage tube and negative pressure ball, and switch is arranged on liquid discharging tube, will drain
Pipe is inserted at drainage, flattens negative pressure ball, closes the switch on liquid discharging tube, forms negative pressure, is drawn drainage-fluid, is then opened out again
It closes, drainage-fluid is discharged from liquid discharging tube and is collected.For this kind of flow diverter by the on or off of hand control switch, operation is comparatively laborious,
It can not achieve the automatic conducting of negative pressure ball and liquid discharging tube or be isolated.
Invention content
The present invention overcomes the deficiencies in the prior art, provide a kind of depression drainage device, are provided with one-way valve structures, energy
Effective drainage avoids drainage-fluid adverse current, the automatic on or off for carrying out tapping easy to operate.
To achieve the goals above, the technical solution adopted by the present invention is：A kind of depression drainage device, including negative pressure ball, institute
It includes liquid feeding end and tapping end to state negative pressure ball, and the liquid feeding end of the negative pressure ball is equipped with drainage tube, and the tapping end of the negative pressure ball is set
There are liquid discharging tube, the drainage tube to be equipped with the feed liquor check valve realized by drainage tube to negative pressure ball one-way conduction, the liquid discharging tube
It is equipped with the tapping check valve realized by negative pressure ball to liquid discharging tube one-way conduction.
Through the above scheme it is found that negative pressure ball generates lasting vacuum suction, timely, efficient, the lasting drainage of energy is being drawn
Feed liquor check valve is set at flow tube, realizes the one-way conduction by drainage tube to negative pressure ball, prevents drainage-fluid adverse current, effectively prevent drawing
The adverse current of flow liquid infects, and tapping check valve is arranged on liquid discharging tube, manual switch is substituted with tapping check valve, in drainage or tapping
When, without manually controlling on or off, simplify operation.
The further setting of the present invention is：The tapping check valve includes tapping valve body and tapping spool, tapping valve body
It is equipped with tapping valve chamber, and tapping import, the tapping outlet being connected to tapping valve chamber, the tapping spool slip setting exist
Bleeder valve intracavitary, the tapping import are conducted with negative pressure ball, and the tapping outlet is conducted with liquid discharging tube, the tapping spool
Tapping valve block including sheet, the tapping valve block coordinate with tapping import sealing, and the bleeder valve intracavitary, which is equipped with, prevents tapping
Valve block closes the first position limiting structure of tapping outlet.
Through the above scheme it is found that the sliding of tapping spool is arranged in bleeder valve intracavitary, in imbibition, the tapping valve block of sheet
Upper surface closes tapping import, is in air-tight state, starts tapping, first squeezes negative pressure ball so that tapping valve block is put to close
Liquid export direction moves, and the first position limiting structure is contradicted to tapping valve block, limits the movement of tapping valve block, and tapping valve block will not close
Tapping exports, and negative pressure ball is connected with liquid discharging tube, and drainage-fluid is flowed out from negative pressure ball, when negative pressure ball restores to deform, in the suction of gas
Under power, tapping valve block is moved to close to tapping import direction, and closes tapping import, realizes that sealing, drainage tube can carry out
Imbibition.
The further setting of the present invention is：The tapping valve block is extended with tapping relative to close to the other side of tapping import
Guide post, for the tapping guide post perpendicular to tapping valve block, first position limiting structure includes for keeping out tapping valve block
One support plate, first support plate is arranged on bleeder valve cavity wall and between tapping valve block and tapping outlet, described
Tapping valve chamber is separated into tapping upper cavity and tapping lower chamber by the first support plate, and first support plate is equipped with the first straight slot
With the first pilot hole, the tapping upper cavity is conducted by the first straight slot and tapping lower chamber, first pilot hole with put
Liquid guide post is oriented to sliding cooperation.
Through the above scheme it is found that the first position limiting structure includes the first support plate, and go out with tapping positioned at tapping valve block
It between mouthful, is used to limit the movement of tapping valve block, prevents it from closing tapping outlet, tapping valve chamber is separated by the first support plate
At tapping upper cavity and tapping lower chamber, the first support plate is equipped with the first pilot hole and the first straight slot, and tapping upper cavity passes through
First straight slot is conducted with tapping lower chamber, drainage-fluid conducting flowing, and the first pilot hole and tapping guide post clearance fit are realized
The guiding of tapping spool slides, and saves material.
The further setting of the present invention is：The negative pressure ball is equipped with first annular sealing, the tapping valve body it is outer
Wall is equipped with first annular convex block and the first external screw thread, is screwed with the first fastening nut on first external screw thread, and described first
Annular seal is clamped between first annular convex block and the first fastening nut.
Through the above scheme it is found that the first annular sealing of negative pressure ball is pressed on tapping valve body by the first fastening nut
On outer wall, the sealing at negative pressure ball tapping end is realized, be convenient for extrusion operation.
The further setting of the present invention is：The feed liquor check valve includes feed liquor valve body and feed liquor spool, feed liquor valve body
It is equipped with feed liquor valve chamber, and feed liquor import, the feed liquor outlet being connected to feed liquor valve chamber, the feed liquor spool slip setting exist
Liquid feed valve intracavitary, the feed liquor import are conducted with drainage tube, and the feed liquor outlet is conducted with negative pressure ball, the feed liquor spool
Feed liquor valve block including sheet, the feed liquor valve block coordinate with feed liquor import sealing, and the liquid feed valve intracavitary, which is equipped with, prevents feed liquor
Valve block closes the second position limiting structure of feed liquor outlet.
Through the above scheme it is found that feed liquor spool sliding is arranged in liquid feed valve intracavitary, when squeezing negative pressure ball, in gas
Under pressure, the upper surface of feed liquor valve block closes feed liquor import, is in air-tight state, and when starting drainage, negative pressure ball restores deformation,
Under the suction of gas so that for feed liquor valve block to close to feed liquor export direction movement, the second position limiting structure contradicts feed liquor valve block, limit
Feed liquor valve block movement processed, feed liquor valve block will not close feed liquor outlet, and drainage tube is connected with negative pressure ball, and drainage-fluid flows into negative pressure
Ball.
The further setting of the present invention is：The feed liquor valve block is extended with feed liquor relative to close to the other side of feed liquor import
Guide post, for the feed liquor guide post perpendicular to feed liquor valve block, second position limiting structure includes for keeping out feed liquor valve block
Two support plates, second support plate is arranged on liquid feed valve cavity wall and between feed liquor valve block and feed liquor outlet, described
Feed liquor valve chamber is separated into feed liquor upper cavity and feed liquor lower chamber by the second support plate, and second support plate is equipped with the second straight slot
With the second pilot hole, the feed liquor upper cavity is conducted by the second straight slot and feed liquor lower chamber, second pilot hole with into
Liquid guide post is oriented to sliding cooperation.
Through the above scheme it is found that the second position limiting structure includes the second support plate, and go out with feed liquor positioned at feed liquor valve block
It between mouthful, is used to limit the movement of feed liquor valve block, prevents it from closing feed liquor outlet, feed liquor valve chamber is separated by the second support plate
At feed liquor upper cavity and feed liquor lower chamber, the second support plate is equipped with the second pilot hole and the second straight slot, and feed liquor upper cavity passes through
Second straight slot is conducted with feed liquor lower chamber, drainage-fluid conducting flowing, and the second pilot hole and feed liquor guide post clearance fit are realized
The guiding of feed liquor spool slides, and saves material.
The further setting of the present invention is：The negative pressure ball is equipped with the second annular seal, the feed liquor valve body it is outer
Wall is equipped with the second annular lug and the second external screw thread, is screwed with the second fastening nut on second external screw thread, and described second
Annular seal is clamped between the second annular lug and the second fastening nut.
Through the above scheme it is found that the second annular seal of negative pressure ball is pressed on feed liquor valve body by the second fastening nut
On outer wall, the sealing of negative pressure ball liquid feeding end is realized, be convenient for extrusion operation.
The present invention it is further be arranged be：The liquid discharging tube is also associated with fluid bag.
Through the above scheme it is found that fluid bag is recycled for collecting drainage-fluid.
The invention will be further described below in conjunction with the accompanying drawings.
Description of the drawings
Fig. 1 is overall structure of the present invention；
Fig. 2 is side structure schematic diagram of the present invention；
Fig. 3 is the A-A diagrammatic cross-sections of Fig. 2；
Fig. 4 is the portions the B enlarged diagram of Fig. 3；
Fig. 5 is the portions the C enlarged diagram of Fig. 3；
Fig. 6 is tapping spool and the first position limiting structure cooperation schematic diagram；
Fig. 7 is one schematic diagram of other embodiment of check valve internal structure in the present invention；
Fig. 8 is two schematic diagram of other embodiment of check valve internal structure in the present invention.
Specific implementation mode
As shown in figures 1 to 6, a kind of depression drainage device, including negative pressure ball 1, drainage tube 2 and liquid discharging tube 3, negative pressure ball 1 include into
Liquid end 11 and tapping end 12, liquid feeding end 11 and the drainage tube 2 of negative pressure ball 1 are conducted, tapping end 12 and the liquid discharging tube 3 of negative pressure ball 1
It is conducted, drainage tube 2, which is equipped with, realizes that by drainage tube 2, liquid discharging tube 3 is equipped with to the feed liquor check valve 4 of 1 one-way conduction of negative pressure ball
It realizes by negative pressure ball 1 to the tapping check valve 5 of 3 one-way conduction of liquid discharging tube.
In the present embodiment, tapping check valve 5 includes tapping valve body 51 and tapping spool 52, and tapping valve body 51 is equipped with
Tapping valve chamber 53, and the tapping import 54, the tapping that are connected to tapping valve chamber 53 export 55, and the setting of 52 slip of tapping spool exists
In tapping valve chamber 53, tapping import 54 is conducted with negative pressure ball 1, and tapping outlet 55 is conducted with liquid discharging tube 3, and tapping spool 52 wraps
The tapping valve block 521 and tapping guide post 522 of sheet are included, tapping guide post 522 is along tapping valve block 521 close to tapping outlet 55
Side is extended, and tapping guide post 522 coordinates perpendicular to tapping valve block 521, tapping valve block 521 with the sealing of tapping import 54,
The diameter of tapping valve block 521 is more than the bore of tapping import 54, and being equipped in tapping valve chamber 53, which prevents tapping valve block 521 from closing, puts
First position limiting structure of liquid outlet 55, the first position limiting structure includes the first support plate 56 for keeping out tapping valve block 521, and first
Support plate 56 be arranged on 53 inner wall of tapping valve chamber and positioned at tapping valve block 521 and tapping outlet 55 between, tapping valve chamber 53 by
First support plate 56 is separated into tapping upper cavity 531 and tapping lower chamber 532, and the first support plate 56 is equipped with the first pilot hole
561 and first straight slot 562, tapping upper cavity 531 be conducted with tapping lower chamber 532 by the first straight slot 562, the first pilot hole
561 are oriented to sliding cooperation with tapping guide post 522, and the first support plate 56 is made of four spaced straight panels, four straight panels
One end is fixed on the inner wall of tapping valve chamber 53, is moved for limiting tapping spool 52, and the other end surrounds the first pilot hole 561,
First straight slot 562 extends to the first pilot hole 561 by the inner wall of tapping valve chamber 53, passes through convenient for drainage-fluid.
In the present embodiment, negative pressure ball 1 is equipped with first annular sealing 13, and the outer wall of tapping valve body 51 is equipped with first
Annular lug 511 and the first external screw thread 512 are screwed with the first fastening nut 61, first annular sealing on first external screw thread 512
13 are clamped between first annular convex block 511 and the first fastening nut 61.
In the present embodiment, feed liquor check valve 4 includes feed liquor valve body 41 and feed liquor spool 42, and feed liquor valve body 41 is equipped with
Feed liquor valve chamber 43, and be connected to feed liquor valve chamber 43 feed liquor import 44, feed liquor outlet 45,52 slip of feed liquor spool setting exists
In feed liquor valve chamber 53, feed liquor import 44 is conducted with drainage tube 2, and feed liquor outlet 45 is conducted with negative pressure ball 1, and feed liquor spool 42 is wrapped
The feed liquor valve block 421 and feed liquor guide post 422 of sheet are included, feed liquor guide post 422 is along feed liquor valve block 421 close to feed liquor outlet 45
Side is extended, and feed liquor guide post 422 coordinates perpendicular to feed liquor valve block 421, feed liquor valve block 421 with the sealing of feed liquor import 44,
The diameter of feed liquor valve block 421 is more than the bore of feed liquor import 44, and being equipped in feed liquor valve chamber 43 prevents the closing of feed liquor valve block 421 from living in
Second position limiting structure of liquid outlet 55, the second position limiting structure includes the second support plate 46 for keeping out feed liquor valve block 421, and second
Support plate 46 be arranged on 43 inner wall of feed liquor valve chamber and positioned at feed liquor valve block 421 and feed liquor outlet 45 between, feed liquor valve chamber 43 by
Second support plate 46 is separated into feed liquor upper cavity 431 and feed liquor lower chamber 432, and the second support plate 46 is equipped with the second pilot hole
461 and second straight slot 462, feed liquor upper cavity 431 be conducted with feed liquor lower chamber 432 by the second straight slot 462, the second pilot hole
461 are oriented to sliding cooperation with feed liquor guide post 422, and the second support plate 46 is made of four spaced straight panels, four straight panels
One end is fixed on the inner wall of feed liquor valve chamber 43, is moved for limiting feed liquor spool 42, and the other end surrounds the second pilot hole 461,
Second straight slot 462 extends to the second pilot hole 461 by the inner wall of feed liquor valve chamber 43, passes through convenient for drainage-fluid.
In the present embodiment, negative pressure ball 1 is equipped with the second annular seal 14, and the outer wall of feed liquor valve body 41 is equipped with second
Annular lug 411 and the second external screw thread 412, the second fastening nut 62 is screwed on the second external screw thread 412, and second annular is close
Envelope portion is clamped between the second annular lug and the second fastening nut 62.
In the present embodiment, liquid discharging tube 3 is also associated with fluid bag 7.
It is illustrated in figure 7 the other embodiment one that drainage-fluid one-way conduction check valve is realized in the present invention：Check valve 8 wraps
Valve body 81 and spool 82 are included, valve body 81 is equipped with valve chamber 83, and import 84, the outlet 85 being connected to valve chamber 83, spool 82
Slip is arranged in valve chamber 83, and import 84 is connected with drainage tube 2 or is connected with negative pressure ball 1, and outlet 85 is connected with negative pressure ball 1
Or be connected with liquid discharging tube 3, spool 82 includes valve block 821 and pillar 822, and valve block 821 coordinates with the sealing of import 84, valve block 821
Diameter be more than the bore of import 84, pillar 822 is placed between outlet 85 and valve block 821, pillar 822 perpendicular to valve block 821
In four uniformly arrangements, it can contact on valve chamber 83, prevent valve block 821 from closing outlet 85.
It is illustrated in figure 8 the other embodiment two that drainage-fluid one-way conduction check valve is realized in the present invention：Check valve 9 wraps
Valve body 91 and spool 92 are included, valve body 91 is equipped with valve chamber 93, and import 94, the outlet 95 being connected to valve chamber 93, spool 92
Slip is arranged in valve chamber 93, and import 94 is connected with drainage tube 2 or is connected with negative pressure ball 1, and outlet 95 is connected with negative pressure ball 1
Or be connected with liquid discharging tube 3, spool 92 includes valve block 921 and guide post 922, and valve block 921 coordinates with the sealing of import 94, valve block 921
Diameter be more than the bore of import 94, guide post 922 is placed between outlet 95 and valve block 921 perpendicular to valve block 921, outlet 95
Be extended with convex pipe 96 into valve chamber 91, convex pipe 96 and guide post 922 are oriented to sliding cooperation, 96 upper edge of convex pipe its it is axially uniformly distributed there are four
Through-hole 961 circulates convenient for drainage-fluid, prevents valve block 921 from closing outlet 95.
Claims (6)
1. a kind of depression drainage device, including negative pressure ball, the negative pressure ball includes liquid feeding end and tapping end, the feed liquor of the negative pressure ball
End is equipped with drainage tube, and the tapping end of the negative pressure ball is equipped with liquid discharging tube, and the drainage tube, which is equipped with, to be realized by drainage tube to negative pressure
The feed liquor check valve of ball one-way conduction, it is characterised in that：The liquid discharging tube is equipped with realization and is unidirectionally led by negative pressure ball to liquid discharging tube
Logical tapping check valve, the tapping check valve include tapping valve body and tapping spool, and tapping valve body is equipped with tapping valve chamber,
And tapping import, the tapping outlet being connected to tapping valve chamber, tapping spool slip setting are described in bleeder valve intracavitary
Tapping import is conducted with negative pressure ball, and the tapping outlet is conducted with liquid discharging tube, and the tapping spool includes the tapping of sheet
Valve block, the tapping valve block coordinate with tapping import sealing, and the bleeder valve intracavitary, which is equipped with, prevents tapping valve block from closing tapping
First position limiting structure of outlet, the negative pressure ball are equipped with first annular sealing, and the outer wall of the tapping valve body is equipped with the
One annular lug and the first external screw thread are screwed with the first fastening nut, the first annular sealing on first external screw thread
It is clamped between first annular convex block and the first fastening nut.
2. depression drainage device according to claim 1, it is characterised in that：The tapping valve block is relative to close to tapping import
The other side be extended with tapping guide post, for the tapping guide post perpendicular to tapping valve block, first position limiting structure includes using
In the first support plate for keeping out tapping valve block, first support plate be arranged on bleeder valve cavity wall and positioned at tapping valve block with
Between tapping outlet, the tapping valve chamber is separated into tapping upper cavity and tapping lower chamber by the first support plate, described first
Fagging is equipped with the first straight slot and the first pilot hole, and the tapping upper cavity is conducted by the first straight slot and tapping lower chamber,
First pilot hole is oriented to sliding cooperation with tapping guide post.
3. depression drainage device according to claim 1 or 2, it is characterised in that：The feed liquor check valve includes feed liquor valve body
And feed liquor spool, feed liquor valve body be equipped with feed liquor valve chamber, and be connected to feed liquor valve chamber feed liquor import, feed liquor export, institute
It states feed liquor spool slip to be arranged in liquid feed valve intracavitary, the feed liquor import is conducted with drainage tube, and the feed liquor is exported and born
Pressure ball is conducted, and the feed liquor spool includes the feed liquor valve block of sheet, and the feed liquor valve block coordinates with feed liquor import sealing, described
Liquid feed valve intracavitary is equipped with the second position limiting structure for preventing feed liquor valve block from closing feed liquor outlet.
4. depression drainage device according to claim 3, it is characterised in that：The feed liquor valve block is relative to close to feed liquor import
The other side be extended with feed liquor guide post, for the feed liquor guide post perpendicular to feed liquor valve block, second position limiting structure includes using
In the second support plate for keeping out feed liquor valve block, second support plate be arranged on liquid feed valve cavity wall and positioned at feed liquor valve block with
Between feed liquor outlet, the feed liquor valve chamber is separated into feed liquor upper cavity and feed liquor lower chamber by the second support plate, described second
Fagging is equipped with the second straight slot and the second pilot hole, and the feed liquor upper cavity is conducted by the second straight slot and feed liquor lower chamber,
Second pilot hole is oriented to sliding cooperation with feed liquor guide post.
5. depression drainage device according to claim 4, it is characterised in that：The negative pressure ball is equipped with the second ring packing
Portion, the outer wall of the feed liquor valve body are equipped with the second annular lug and the second external screw thread, and the is screwed on second external screw thread
Two fastening nuts, second annular seal are clamped between the second annular lug and the second fastening nut.
6. depression drainage device according to claim 1, it is characterised in that：The liquid discharging tube is also associated with fluid bag.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610997009.3A CN106421943B (en) | 2016-11-11 | 2016-11-11 | Depression drainage device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610997009.3A CN106421943B (en) | 2016-11-11 | 2016-11-11 | Depression drainage device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106421943A CN106421943A (en) | 2017-02-22 |
| CN106421943B true CN106421943B (en) | 2018-10-19 |
Family
ID=58207766
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610997009.3A Active CN106421943B (en) | 2016-11-11 | 2016-11-11 | Depression drainage device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106421943B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE20309537U1 (en) * | 2003-06-20 | 2003-08-28 | Ehlert Helmut | Check valve assembly is formed by annular disc with central bore and one-way valve with valve plate covering central bore in first position and which inside cage fastened to disc is movable into second position opening central bore |
| CN2849380Y (en) * | 2005-11-03 | 2006-12-20 | 杨俊波 | Sealing valve for fume exhaustor |
| CN101829370A (en) * | 2010-05-20 | 2010-09-15 | 重庆山外山科技有限公司 | One-way valve for hemodialysis machine |
| CN202490326U (en) * | 2012-03-28 | 2012-10-17 | 成都威力生生物科技有限公司 | Medical check valve |
| CN203694195U (en) * | 2014-02-19 | 2014-07-09 | 陈燕 | Oral cavity negative-pressure drainage device |
| CN206577170U (en) * | 2016-11-11 | 2017-10-24 | 陶崇林 | Depression drainage device |
-
2016
- 2016-11-11 CN CN201610997009.3A patent/CN106421943B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE20309537U1 (en) * | 2003-06-20 | 2003-08-28 | Ehlert Helmut | Check valve assembly is formed by annular disc with central bore and one-way valve with valve plate covering central bore in first position and which inside cage fastened to disc is movable into second position opening central bore |
| CN2849380Y (en) * | 2005-11-03 | 2006-12-20 | 杨俊波 | Sealing valve for fume exhaustor |
| CN101829370A (en) * | 2010-05-20 | 2010-09-15 | 重庆山外山科技有限公司 | One-way valve for hemodialysis machine |
| CN202490326U (en) * | 2012-03-28 | 2012-10-17 | 成都威力生生物科技有限公司 | Medical check valve |
| CN203694195U (en) * | 2014-02-19 | 2014-07-09 | 陈燕 | Oral cavity negative-pressure drainage device |
| CN206577170U (en) * | 2016-11-11 | 2017-10-24 | 陶崇林 | Depression drainage device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106421943A (en) | 2017-02-22 |
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