CN201807371U - Suck-back resistant duct - Google Patents
Suck-back resistant duct Download PDFInfo
- Publication number
- CN201807371U CN201807371U CN2010205636487U CN201020563648U CN201807371U CN 201807371 U CN201807371 U CN 201807371U CN 2010205636487 U CN2010205636487 U CN 2010205636487U CN 201020563648 U CN201020563648 U CN 201020563648U CN 201807371 U CN201807371 U CN 201807371U
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- China
- Prior art keywords
- suck
- arm
- barrier film
- duct
- conduit
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Abstract
The utility model discloses a suck-back resistant duct which comprises a main duct and a branch duct. The main duct is mutually communicated with the branch duct, an outlet of the branch duct is connected to the atmosphere, and the main duct and the branch duct are respectively and internally provided with one-way stop diaphragms. The suck-back resistant duct of the utility model can be used for the analytical distillation process of waste water, distilled liquid or gas outflows from the main duct to enter an absorption bottle inserted at the lower end of the main duct with absorption liquid in normal distillation, and a one-way diaphragm plate valve of the branch duct stops. The one-way stop diaphragm of the main duct stops, the one-way stop diaphragm of the branch duct is opened, air enters a distillation bottle, and suck-back absorption liquid is intercepted by the stop diaphragm of the main duct and can not be sucked back to inversely flow to the distillation bottle in abnormal conditions, such as that the temperature in the distillation bottle is suddenly reduced, the pressure of a distillation system is reduced and the absorption liquid is sucked back.
Description
Technical field
The utility model relates to a kind of anti-suck conduit, particularly prevents the outflow liquid anti-suck conduit of absorption liquid suck-back in the effluent monitoring distillation preprocessing process.
Background technology
In the waste water quality monitoring, there are a plurality of monitoring projects the purpose component distilation in the water sample to be come out by the method for distillation, absorb with absorption liquid then, measure at last.During distillation procedure, distillation fraction links to each other by conduit with absorption portion, and conduit imports absorption liquid with the component that distills out.The conduit that uses is common grass tube at present, directly inserts in the absorption liquid to absorb.When abnormal condition, reduce suddenly as temperature in the absorption bottle, negative pressure appears in distillation fraction, and absorption liquid enters in the cucurbit along the conduit suck-back, causes the failure of an experiment.
CN200420012697.6 discloses a kind of suck-back-prevention type conduit, and a bigger anti-suck bubble is set between the air inlet of conduit and gas outlet, and when suck-back occurring, suck-back liquid branch enters the anti-suck bubble, prevents that further suck-back is to miscellaneous equipment.Though this structure has certain anti-suck effect, the anti-suck bubble can not be provided with too big, and the anti-suck effect is relatively poor, can not prevent more serious suck-back situation, still may cause the failure of an experiment.
Summary of the invention
At the deficiencies in the prior art, the utility model provides a kind of anti-suck conduit, can effectively prevent the generation of suck-back phenomenon.
The utility model anti-suck conduit comprises to be responsible for and arm, and the person in charge and arm are interconnected, and the arm outlet connects atmosphere, is provided with unidirectional by barrier film in the arm.
In the utility model, the unidirectional barrier film that ends that is provided with in the arm is for ending fluid from being responsible for the unidirectional barrier film that ends that flows to arm.Unidirectionally comprise diaphragm and pedestal by barrier film, but diaphragm is fixed on pedestal one side in the mode of On/Off, diaphragm can adopt appropriate materials to make, as plastic film, metallic membrane etc.The unidirectional barrier film that ends can be provided with one, also can be provided with a plurality of.
In the utility model, be responsible for the person in charge below arm is communicated with the position in be provided with unidirectional by barrier film, the person in charge unidirectional by barrier film for exporting the unidirectional barrier film that ends that flows back to inlet from being responsible for by fluid.The unidirectional barrier film that ends on the person in charge can be identical with the unidirectional structure by barrier film on the arm.
In the utility model, the person in charge and arm can adopt suitable material on demand, as glass tube, plastic tube etc.Arm can be vertical mutually with the person in charge, also can become suitable angle, and arm can be a straight tube, also can be bend pipe.
Adopt the conduit of the utility model structure, can effectively prevent the generation of suck-back phenomenon, go for processes such as waste water pre-distillation, avoid influencing monitoring result.
Description of drawings
Fig. 1 is a kind of concrete structure schematic diagram of the utility model anti-suck conduit.
Wherein: 1-is responsible for, the 2-arm, and 3-is unidirectional by barrier film.
The specific embodiment
Further specify structure of the present utility model and operation principle below in conjunction with accompanying drawing.
As shown in Figure 1, the utility model anti-suck conduit comprises the person in charge 1 and arm 2, in a kind of concrete structure, all is provided with unidirectional by barrier film 3 in the person in charge 1 and the arm 2.
Unidirectional on the person in charge only allows to distillate liquid or gas passes through from the top down by barrier film.The unidirectional barrier film that ends in the arm only allows air to pass through in the extroversion pipe, and distillate that distills out or gas can't discharge.During abnormal condition, reduce as temperature in the cucurbit suddenly, when system pressure reduces, the unidirectional barrier film that ends in being responsible for is closed, and arm is unidirectional to be opened by diaphragm, and air enters in the cucurbit, and the barrier film that ends that the absorption liquid of suck-back is responsible for is held back, the suck-back into cucurbit that refluxes again not, and then prevent suck-back guarantees that experiment normally carries out.
Claims (10)
1. anti-suck conduit is characterized in that: the anti-suck conduit comprises to be responsible for and arm, is responsible for and arm is interconnected, and the arm outlet connects atmosphere, and the unidirectional barrier film that ends is set in the arm.
2. according to the described anti-suck conduit of claim 1, it is characterized in that: the unidirectional barrier film that ends that is provided with in the arm is for ending fluid from being responsible for the unidirectional barrier film that ends that flows to arm.
3. according to claim 1 or 2 described anti-suck conduits, it is characterized in that: unidirectionally comprise diaphragm and pedestal by barrier film, but diaphragm is fixed on pedestal one side in the mode of On/Off.
4. ask 3 described anti-suck conduits according to right, it is characterized in that: diaphragm adopts plastic film or metallic membrane.
5. according to the described anti-suck conduit of claim 3, it is characterized in that: the unidirectional barrier film that ends is provided with one, perhaps is provided with a plurality of.
6. according to the described anti-suck conduit of claim 1, it is characterized in that: be responsible for the person in charge below arm is communicated with the position in be provided with unidirectional by barrier film, the person in charge unidirectional by barrier film for exporting the unidirectional barrier film that ends that flows back to inlet from being responsible for by fluid.
7. according to the described anti-suck conduit of claim 1, it is characterized in that: the person in charge and arm are glass tube or plastic tube.
8. according to the described anti-suck conduit of claim 1, it is characterized in that: arm is vertical mutually with the person in charge, perhaps becomes suitable angle.
9. according to the described anti-suck conduit of claim 1, it is characterized in that: arm is a straight tube, or bend pipe.
10. according to the described anti-suck conduit of claim 6, it is characterized in that: the structure that unidirectional on barrier film and arm of unidirectional on the person in charge ended barrier film is identical.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205636487U CN201807371U (en) | 2010-10-13 | 2010-10-13 | Suck-back resistant duct |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205636487U CN201807371U (en) | 2010-10-13 | 2010-10-13 | Suck-back resistant duct |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201807371U true CN201807371U (en) | 2011-04-27 |
Family
ID=43890320
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205636487U Expired - Lifetime CN201807371U (en) | 2010-10-13 | 2010-10-13 | Suck-back resistant duct |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201807371U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108226039A (en) * | 2018-01-05 | 2018-06-29 | 江苏中宜金大分析检测有限公司 | The device and method that a kind of total nitrogen measures |
| CN111397411A (en) * | 2020-02-28 | 2020-07-10 | 北京空间机电研究所 | Cylindrical anti-reflux loop heat pipe capillary pump assembly for spacecraft |
-
2010
- 2010-10-13 CN CN2010205636487U patent/CN201807371U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108226039A (en) * | 2018-01-05 | 2018-06-29 | 江苏中宜金大分析检测有限公司 | The device and method that a kind of total nitrogen measures |
| CN108226039B (en) * | 2018-01-05 | 2020-08-04 | 江苏中宜金大分析检测有限公司 | Device and method for measuring total nitrogen of plants |
| CN111397411A (en) * | 2020-02-28 | 2020-07-10 | 北京空间机电研究所 | Cylindrical anti-reflux loop heat pipe capillary pump assembly for spacecraft |
| CN111397411B (en) * | 2020-02-28 | 2021-07-09 | 北京空间机电研究所 | Cylindrical anti-reflux loop heat pipe capillary pump assembly for spacecraft |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110427 |