CN209841482U - Suck-back prevention sampling device - Google Patents
Suck-back prevention sampling device Download PDFInfo
- Publication number
- CN209841482U CN209841482U CN201920566759.4U CN201920566759U CN209841482U CN 209841482 U CN209841482 U CN 209841482U CN 201920566759 U CN201920566759 U CN 201920566759U CN 209841482 U CN209841482 U CN 209841482U
- Authority
- CN
- China
- Prior art keywords
- air inlet
- air
- absorption tube
- ball
- absorption
- 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.)
- Active
Links
Landscapes
- Sampling And Sample Adjustment (AREA)
Abstract
The utility model discloses a sampling device for preventing suck-back, which comprises a shell, wherein an air pump and an air exhaust pipeline are arranged in the shell, an air inlet interface is arranged at the back of the shell, one end of the air inlet interface is connected with the air pump through the air exhaust pipeline, the other end of the air inlet interface is connected with a collector through a hose, a flowmeter for measuring the air flow is arranged on the front of the shell, the collector adopts a bubble absorption tube, the bubble absorption tube comprises an air inlet, an air outlet, an air inlet pipe, an air outlet pipe, an absorption ball and an absorption tube, the air inlet is connected with the air inlet pipe, the tail end of the air inlet pipe is communicated with the lower end of the absorption tube, the upper end of the absorption tube is communicated with the absorption ball, the inner wall of the absorption tube above the porous plate is provided with a porous ball, and the air inlet of the bubble absorption tube is provided with a one-way valve. The external atmosphere is pumped from the air pump, and finally the result is displayed by the flowmeter. The one-way valve is arranged at the air inlet end of the bubble absorption tube, so that liquid is prevented from flowing back into the sampler, and the safety of sampling equipment is ensured.
Description
Technical Field
The utility model relates to a sampling equipment, concretely relates to prevent sampling equipment of suck-back.
Background
There are many types of atmospheric samplers. The sampling device can be divided into a gas (including steam) sampling device and a particle sampling device according to the collection object. The gas sampling instrument is generally composed of three parts, namely a collector, a flowmeter and an air exhaust power system. The atmosphere sampling instrument plays a good role in detecting harmful gases in air and environment.
The air inlet of the atmosphere sampling instrument is connected with the collector through a hose. In general, the collector has an air inlet end and an air outlet end, the air inlet end is connected with the hose, and the air inlet pipe of the collector is communicated with the absorption pipe, so that the suck-back phenomenon is easy to occur.
During sampling, liquid in the absorption tube enters the gas path for various reasons, so that the gas path is polluted, and the float of the flowmeter cannot normally indicate the flow rate, so that back suction is formed. In-situ sampling can seriously affect the sampling quality if a solution suck-back phenomenon occurs.
The harm of suck-back not only reduces the absorption liquid in the absorption tube and influences the absorption efficiency of pollutants, but also corrodes each part in the gas circuit, so that the air pump air inlet and outlet diaphragm is not tightly locked, and the negative pressure is reduced. More serious is that absorption liquid gets into the flowmeter, can make the float of instructing the flow glue on the pipe wall, can not normally instruct the flow, and at this moment the sample thief if not overhauld in time, just can't use, has condemned danger moreover.
Disclosure of Invention
For solving the suck-back problem among the above-mentioned background art, the utility model provides a prevent sampling equipment of suck-back.
The utility model provides a following technical scheme:
the anti-suck-back sampling device comprises a shell, wherein an air exhaust pipeline connected with an air exhaust pump is arranged in the shell, an air inlet interface is arranged at the back of the shell, one end of the air inlet interface is connected with the air exhaust pump through the air exhaust pipeline in the shell, the other end of the air inlet interface is connected with a collector through a hose outside the shell, a flowmeter for measuring the air flow is arranged on the front of the shell, an adjusting knob is installed above the flowmeter, the collector adopts an air bubble absorption tube, the air bubble absorption tube comprises an air inlet, an air outlet, an air inlet pipe, an air outlet pipe, an absorption ball and an absorption pipe, the air inlet is connected with the air inlet pipe, the tail end of the air inlet pipe is communicated with the lower end of the absorption pipe, the upper end of the absorption pipe is communicated with the absorption ball, the absorption ball is communicated with the air, the periphery of the porous plate is tightly attached to the inner wall of the absorption tube, a porous ball is arranged on the inner wall of the absorption tube above the porous plate, the porous ball is clamped in the absorption tube, and a check valve is installed at the air inlet of the bubble absorption tube.
Furthermore, the porous ball is a plastic hollow ball body, a plurality of small holes are formed in the hollow ball body, and the aperture of each small hole is smaller than that of each hole in the porous plate.
Further, the check valve is a ball valve.
Further, the air pump is connected with a buffer, a regulating valve is arranged on a pipeline of the buffer, and the regulating valve is connected with the flowmeter.
Compared with the prior art, the beneficial effects of the utility model are that: the air inlet end of the bubble absorption tube is connected with a hose, the hose is connected to the air inlet end of the sampling device, external atmosphere is extracted from the air extraction pump, and finally a result is displayed by the flowmeter. The one-way valve is arranged at the air inlet end of the bubble absorption tube, so that liquid is prevented from flowing back into the sampler, and the safety of sampling equipment is ensured.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic structural diagram of the collector of the present invention.
Fig. 3 is a schematic diagram of the air extraction of the present invention.
In the figure: 1. a housing; 2. an air pump; 3. an air extraction pipeline; 4. an air inlet interface; 5. a hose; 6. the device comprises a collector 61, an air inlet 62, an air inlet pipe 63, an air outlet pipe 64, an absorption ball 65, an absorption pipe 66, an air outlet 67, a porous plate 68 and a porous ball; 7. a flow meter; 8. adjusting a knob; 9. a one-way valve; 10. buffer 11, regulating valve 12 and flowmeter.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1-3, the anti-suck-back sampling apparatus of the present invention comprises a housing 1, an air exhaust pipeline 3 connected between an air exhaust pump 2 and the air exhaust pump 2 is disposed in the housing 1, an air inlet 4 is disposed on the back of the housing 1, one end of the air inlet 4 is connected to the air exhaust pump 2 through the air exhaust pipeline 3 in the housing 1, the other end of the air inlet 4 is connected to a collector 6 through a hose 5 outside the housing 1, a flow meter 7 for measuring air flow is disposed on the front of the housing 1, an adjusting knob 8 is mounted above the flow meter 7, the flow meter 7 is mounted in an air path for recording the amount of air flowing through, the collector 6 adopts a bubble absorption tube for absorbing liquid or vapor pollutants, the bubble absorption tube includes an air inlet 61, an air outlet 66, an air inlet tube 62, an air outlet 63, an absorption ball 64 and an, the end of the air inlet pipe 62 is communicated with the lower end of the absorption pipe 65, the upper end of the absorption pipe 65 is communicated with the absorption ball 64, the absorption ball 64 is communicated with the air outlet pipe 63, the outlet of the air outlet pipe 63 is an air outlet 66, a perforated plate 67 is arranged at the position, close to the air inlet pipe 62, of the lower end of the absorption pipe 65, the inner wall of the absorption pipe 65 is tightly attached to the periphery of the perforated plate 67, a perforated ball 68 is arranged on the inner wall of the absorption pipe 65 above the perforated plate 67, the perforated ball 68 is clamped in the absorption pipe 65, and the check valve 9 is installed at the. The one-way valve 9 is arranged to prevent the liquid from flowing back into the sampler and to prevent the liquid from flowing backwards.
The porous ball 68 is a plastic hollow ball body, and a plurality of small holes are formed on the hollow ball body. The pore size of the small pores is smaller than the pore size of the pores in the porous plate 67.
The check valve is preferably a ball valve and the tap body is a sphere with a circular through hole or passage through its axis. I.e. when the ball is rotated 90 degrees, it should be fully spherical at the inlet and outlet to intercept the flow. The ball valve is driven by the valve rod and rotates around the axis of the ball valve to open or close the valve, and may be used in fluid regulation and control. Small volume and reliable sealing.
The air pump 2 is connected with a buffer 10, a regulating valve 11 is arranged on a pipeline of the buffer 10, and the regulating valve 11 is connected with a flowmeter 12. The outside atmosphere is drawn from the suction pump 2, and the result is finally displayed by a flow meter. The air pump has compact structure, high efficiency and large air pumping pressure.
The air inlet pipe of the bubble absorption pipe is directly communicated with the absorption pipe, so that backflow is easy to occur. By arranging the perforated plate 67 and the perforated ball 68, the sampled large bubbles are decomposed into small bubbles which are uniform and then pass through the perforated ball 68 to be decomposed into smaller bubbles again, so that the total contact area and the contact time are increased, and the absorption efficiency is increased.
The air inlet end of the bubble absorption tube is connected with a hose which is connected with the air inlet end of the sampling device, the external atmosphere is extracted from the air extracting pump 2, and finally the result is displayed by a flowmeter. The one-way valve 9 is arranged at the end of the air inlet 61 of the bubble absorption tube, so that liquid is prevented from flowing back into the sampler, and the safety of sampling equipment is ensured.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (4)
1. Prevent sampling equipment of suck-back, its characterized in that: the device comprises a shell, an air exhaust pipeline connected with an air exhaust pump is arranged in the shell, an air inlet interface is arranged at the back of the shell, one end of the air inlet interface is connected with the air exhaust pump through the air exhaust pipeline in the shell, the other end of the air inlet interface is connected with a collector through a hose outside the shell, a flowmeter for measuring air flow is arranged on the front of the shell, an adjusting knob is arranged above the flowmeter, the collector adopts a bubble absorption tube, the bubble absorption tube comprises an air inlet, an air outlet, an air inlet pipe, an air outlet pipe, an absorption ball and an absorption pipe, the air inlet is connected with the air inlet pipe, the tail end of the air inlet pipe is communicated with the lower end of the absorption tube, the upper end of the absorption tube is communicated with the absorption ball, the absorption ball is communicated with the air outlet pipe, the, the periphery of the porous plate is tightly attached to the inner wall of the absorption tube, a porous ball is arranged on the inner wall of the absorption tube above the porous plate, the porous ball is clamped in the absorption tube, and a check valve is installed at the air inlet of the bubble absorption tube.
2. The anti-suck back sampling device of claim 1, wherein: the porous ball is a plastic hollow ball body, a plurality of small holes are formed in the hollow ball body, and the aperture of each small hole is smaller than that of each hole in the porous plate.
3. The anti-suck back sampling device of claim 1, wherein: the one-way valve is a ball valve.
4. The anti-suck back sampling device of claim 1, wherein: the air pump is connected with the buffer, a regulating valve is arranged on a pipeline of the buffer, and the regulating valve is connected with the flowmeter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920566759.4U CN209841482U (en) | 2019-04-24 | 2019-04-24 | Suck-back prevention sampling device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920566759.4U CN209841482U (en) | 2019-04-24 | 2019-04-24 | Suck-back prevention sampling device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209841482U true CN209841482U (en) | 2019-12-24 |
Family
ID=68913418
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920566759.4U Active CN209841482U (en) | 2019-04-24 | 2019-04-24 | Suck-back prevention sampling device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209841482U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112485075A (en) * | 2020-11-11 | 2021-03-12 | 宁夏计量质量检验检测研究院 | Absorbing bottle for sampling anti-flushing liquid and anti-reverse-suction gas |
| CN113188855A (en) * | 2021-03-09 | 2021-07-30 | 郑雪飞 | Gas collection system based on atmospheric pollution uses |
| CN114354293A (en) * | 2021-12-31 | 2022-04-15 | 嘉兴绿盾注册安全工程师事务所有限公司 | Atmospheric sampling energy-saving instrument for environment detection |
| CN114354294A (en) * | 2021-12-31 | 2022-04-15 | 嘉兴绿盾注册安全工程师事务所有限公司 | Energy-saving atmospheric sampling instrument |
-
2019
- 2019-04-24 CN CN201920566759.4U patent/CN209841482U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112485075A (en) * | 2020-11-11 | 2021-03-12 | 宁夏计量质量检验检测研究院 | Absorbing bottle for sampling anti-flushing liquid and anti-reverse-suction gas |
| CN113188855A (en) * | 2021-03-09 | 2021-07-30 | 郑雪飞 | Gas collection system based on atmospheric pollution uses |
| CN113188855B (en) * | 2021-03-09 | 2022-11-08 | 山东茂德环境检测有限公司 | Gas collection device based on atmospheric pollution |
| CN114354293A (en) * | 2021-12-31 | 2022-04-15 | 嘉兴绿盾注册安全工程师事务所有限公司 | Atmospheric sampling energy-saving instrument for environment detection |
| CN114354294A (en) * | 2021-12-31 | 2022-04-15 | 嘉兴绿盾注册安全工程师事务所有限公司 | Energy-saving atmospheric sampling instrument |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN209841482U (en) | Suck-back prevention sampling device | |
| CN208383518U (en) | A kind of heavy duty detergent bubble absorption tube with porous plate | |
| CN104502151B (en) | The quantitative aspirator of clear liquid of portable automatic liquid sampler | |
| CN108894942B (en) | A kind of polymer-injecting pump | |
| CN110686938B (en) | Hydrogen oil sampling device and sampling method | |
| CN108458899A (en) | A kind of urban duct water quality monitoring water fetching device | |
| CN211013717U (en) | Pollution source VOCs sampling and online diluting device | |
| CN214503018U (en) | Handheld shallow water sampling device | |
| CN212206995U (en) | Atmospheric particulate matter nucleating device and online atmospheric detection device | |
| CN209820885U (en) | Anti-suck-back sampling device | |
| CN209123953U (en) | A kind of analysis liquid relief auxiliary device | |
| CN208109519U (en) | Anti-suck back type gas sampling device | |
| CN207923522U (en) | A kind of urban duct water quality monitoring water fetching device | |
| CN209589593U (en) | A kind of air contaminant treatment sampling apparatus | |
| CN201352190Y (en) | Negative ion sampling device for purifying indoor air | |
| CN217946332U (en) | VOCS leaks and administers device | |
| CN220487573U (en) | Portable gas well produced water sampler | |
| CN217732730U (en) | Adsorption equipment for aquatic organic component | |
| CN217484278U (en) | Anti-siphon structure for outlet discharge of flow cell | |
| CN112485075A (en) | Absorbing bottle for sampling anti-flushing liquid and anti-reverse-suction gas | |
| CN220400641U (en) | Exhaust structure of hydrogen fuel cell system | |
| CN209476894U (en) | A kind of Multi-channel liquid waste gas collection device | |
| CN215004523U (en) | Anti-suck-back gas absorption bottle for atmospheric sampling | |
| CN216207927U (en) | Aerosol sampler accessory with multi-angle air inlet capacity | |
| CN220303097U (en) | Automatic air bleeder of water supply pipe |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |