CN105268034A - Counter current preventing device of drainage device - Google Patents
Counter current preventing device of drainage device Download PDFInfo
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- CN105268034A CN105268034A CN201410259757.2A CN201410259757A CN105268034A CN 105268034 A CN105268034 A CN 105268034A CN 201410259757 A CN201410259757 A CN 201410259757A CN 105268034 A CN105268034 A CN 105268034A
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- China
- Prior art keywords
- counter current
- current preventing
- liquid
- liquid outlet
- reverse flow
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Abstract
The invention relates to a counter current preventing device of a drainage device. The counter current preventing device belongs to the technical field of medical devices. The counter current preventing device is characterized in that the counter current preventing device is composed of a liquid inlet end, a device upper housing, a device lower housing, a counter current preventing plate and a liquid outlet end; the counter current preventing plate is fixed on the annular surface of the device lower housing through an annular projection of the device upper housing; the device upper housing and the device lower housing are sealed for insulating inside from outside through ultrasonic welding or bonding; the middle part of the counter current preventing plate projects from the liquid inlet end to the liquid outlet end; an included angle beta between two sides in the cross section of the projection is 30-180 DEG; the middle part of the counter current preventing plate is provided with a notch which keeps a segment between the liquid inlet end and the liquid outlet end smooth under pressure; a notch angle alpha is not larger than 30 DEG; a notch tip clearance d in a natural state is 0-0.2mm; and the counter current preventing plate is made of silica gel, latex or polyolefin elastomer. The counter current preventing device with the structure settles a problem of bidirectional communication in a routine drainage device and realizes a purpose that liquid in the segment between the liquid inlet end and the liquid outlet end is unblocked and counter current of the liquid is prevented.
Description
Technical field
The present invention relates to the anti-backflow device of drainage apparatus, belong to technical field of medical instruments.
Background technology
Various drainage apparatus is extensive in clinical practice, and wherein non-negative pressure drainage device easily exists liquid and causes drain to have some setbacks to patient end adverse current from drainage apparatus, pollute the problems such as sheet.
Summary of the invention
The invention provides the anti-backflow device of drainage apparatus, it has the unimpeded but feature of backward stop of drain.
The technical solution adopted for the present invention to solve the technical problems is: the anti-backflow device of drainage apparatus is by liquid feeding end, device upper casing, device lower casing, anti-reverse flow and liquid outlet composition, anti-reverse flow is fixed on the planar annular of device lower casing by the annular protrusion of device upper casing, device upper casing and device lower casing are by external seal in ultrasonic bonding or bonding maintenance, anti-reverse flow middle part is protruding to liquid outlet direction by liquid feeding end, its angle β is between 30 ° ~ 180 °, the middle part of anti-reverse flow is provided with and makes liquid feeding end to the unimpeded under stress otch of liquid outlet, cut angle α is not more than 30 °, under the most advanced and sophisticated naturalness of otch, gap d is between 0 ~ 0.2mm, the material of anti-reverse flow is silica gel, latex or polyolefin elastomer, the device of this structure solves the two-way unimpeded problem of conventional drainage apparatus, reach liquid by liquid feeding end to the unimpeded but object of backward stop of liquid outlet.
Accompanying drawing explanation
Fig. 1 is the structural representation of embodiment.
In figure, 1 liquid feeding end, 2 device upper casings, 3 device lower casings, 4 anti-reverse flows, 5 liquid outlets, 6 annular protrusions, 7 planar annulars, 8 otch.
Detailed description of the invention
Below, accompanying drawings performance of the present invention:
The anti-backflow device of drainage apparatus is by liquid feeding end 1, device upper casing 2, device lower casing 3, anti-reverse flow 4 and liquid outlet 5 form, anti-reverse flow 4 is fixed on the planar annular 7 of device lower casing 3 by the annular protrusion 6 of device upper casing 2, device upper casing 2 and device lower casing 3 are by external seal in ultrasonic bonding or bonding maintenance, anti-reverse flow 4 middle part is protruding to liquid outlet 5 direction by liquid feeding end 1, its angle β is between 30 ° ~ 180 °, the middle part of anti-reverse flow 4 is provided with and makes liquid feeding end 1 to the unimpeded under stress otch 8 of liquid outlet 5, cut angle α is not more than 30 °, under the most advanced and sophisticated naturalness of otch 8, gap d is between 0 ~ 0.2mm, the material of anti-reverse flow 4 is silica gel, latex or polyolefin elastomer.In normal drainage, anti-reverse flow 4 is greater than the pressure of anti-reverse flow 4 in liquid outlet 5 side at the pressure of liquid feeding end 1 side, and the otch 8 of anti-reverse flow 4 opens, and otch 8 is with the increasing of pressure reduction, and opening becomes large; When anti-reverse flow 4 is less than anti-reverse flow 4 when the pressure of liquid outlet 5 side at the pressure of liquid feeding end 1 side, the otch 8 of anti-reverse flow 4 is closed under the effect of reverse pressure reduction, and otch 8 is closed tightr with the increasing of reverse pressure reduction.The device of this structure solves the two-way unimpeded problem of conventional drainage apparatus, reaches liquid by liquid feeding end 1 to the unimpeded but object of backward stop of liquid outlet 5.
Claims (3)
1. the anti-backflow device of drainage apparatus, it is characterized in that device is made up of liquid feeding end (1), device upper casing (2), device lower casing (3), anti-reverse flow (4) and liquid outlet (5), anti-reverse flow (4) is fixed on the planar annular (7) of device lower casing (3) by the annular protrusion (6) of device upper casing (2), and device upper casing (2) and device lower casing (3) are by external seal in ultrasonic bonding or bonding maintenance.
2. the anti-backflow device of drainage apparatus according to claim 1, it is characterized in that the middle part of anti-reverse flow (4) is protruding to liquid outlet (5) direction by liquid feeding end (1), its angle β is between 30 ° ~ 180 °, the middle part of anti-reverse flow (4) is provided with and makes liquid feeding end (1) to the unimpeded under stress otch (8) of liquid outlet (5), cut angle α is not more than 30 °, and under otch (8) most advanced and sophisticated naturalness, gap d is between 0 ~ 0.2mm.
3. the anti-backflow device of the drainage apparatus according to claim 1 and 2, is characterized in that the material of anti-reverse flow (4) is silica gel, latex or polyolefin elastomer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410259757.2A CN105268034A (en) | 2014-06-12 | 2014-06-12 | Counter current preventing device of drainage device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410259757.2A CN105268034A (en) | 2014-06-12 | 2014-06-12 | Counter current preventing device of drainage device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105268034A true CN105268034A (en) | 2016-01-27 |
Family
ID=55138417
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410259757.2A Pending CN105268034A (en) | 2014-06-12 | 2014-06-12 | Counter current preventing device of drainage device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105268034A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109498860A (en) * | 2019-01-15 | 2019-03-22 | 王颖颖 | A kind of medical negative treatment flow diverter anti-backflow device |
| CN111225709A (en) * | 2017-10-20 | 2020-06-02 | 金镕玄 | Flushing device for injecting hazardous chemical liquid and hazardous chemical liquid injection device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4725266A (en) * | 1985-03-25 | 1988-02-16 | Siposs George G | Left ventricle vacuum control and pressure relief valve |
| WO1988006901A1 (en) * | 1987-03-12 | 1988-09-22 | Vernay Laboratories, Inc. | Multiple fluid path junction device |
| CN1189208A (en) * | 1995-06-16 | 1998-07-29 | 雀巢制品公司 | Valve assembly |
| CN102989083A (en) * | 2012-12-15 | 2013-03-27 | 于秀月 | Black-flow preventer valve in pipeline |
| CN203915584U (en) * | 2014-06-12 | 2014-11-05 | 江苏瑞京科技发展有限公司 | The anti-backflow device of drainage apparatus |
-
2014
- 2014-06-12 CN CN201410259757.2A patent/CN105268034A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4725266A (en) * | 1985-03-25 | 1988-02-16 | Siposs George G | Left ventricle vacuum control and pressure relief valve |
| WO1988006901A1 (en) * | 1987-03-12 | 1988-09-22 | Vernay Laboratories, Inc. | Multiple fluid path junction device |
| CN1189208A (en) * | 1995-06-16 | 1998-07-29 | 雀巢制品公司 | Valve assembly |
| CN102989083A (en) * | 2012-12-15 | 2013-03-27 | 于秀月 | Black-flow preventer valve in pipeline |
| CN203915584U (en) * | 2014-06-12 | 2014-11-05 | 江苏瑞京科技发展有限公司 | The anti-backflow device of drainage apparatus |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111225709A (en) * | 2017-10-20 | 2020-06-02 | 金镕玄 | Flushing device for injecting hazardous chemical liquid and hazardous chemical liquid injection device |
| CN109498860A (en) * | 2019-01-15 | 2019-03-22 | 王颖颖 | A kind of medical negative treatment flow diverter anti-backflow device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160127 |
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| WD01 | Invention patent application deemed withdrawn after publication |