CN2081977U - Sampler of gas in soil - Google Patents
Sampler of gas in soil Download PDFInfo
- Publication number
- CN2081977U CN2081977U CN 90222911 CN90222911U CN2081977U CN 2081977 U CN2081977 U CN 2081977U CN 90222911 CN90222911 CN 90222911 CN 90222911 U CN90222911 U CN 90222911U CN 2081977 U CN2081977 U CN 2081977U
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- CN
- China
- Prior art keywords
- gas
- soil
- sampling device
- sampling
- pump
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- 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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Abstract
The utility model relates to a sampling device of gas in soil for detecting the gas in soil. The sampling device of gas in soil improves a present atmosphere sampling device and is composed of an electric source, an electric motor, an electronic timing device, a vacuum thin membrane pump and a gas flow quantity meter. The electric source is the direct current electric source and the electric motor is the miniature electric motor. The pump case of the vacuum thin membrane pump is a whole body and the component joining point in the vacuum thin membrane pump is provided with a sealing ring. The sampling device of gas in soil can generate enough negative voltage and gas flow quantity and the flow quantity is stable. The sampling device of gas in soil is suitable for the specific requirements of the sampling of gas in soil and the volume and weight of the sampling device of gas in soil are also suitable for the field work condition.
Description
The utility model relates to a kind of earth gas sampling that is used to detect soil gas.
What the sampling thief of soil gas was used at present is the sampling thief that environmental administration designs for atmospheric sampling.This air sampler adopts constant speed motor, and purpose is a stabilization of speed when bleeding for a long time, stability of flow, but its incompatiblely requires the time of bleeding short, the earth gas sampling condition that flow is big.Because it is low that the atmospheric sampling negative pressure requires, the pump case of the membrane pump in the existing sampling thief is made up of two parts, and in conjunction with not tight, sealing is poor, can not satisfy the specific (special) requirements of the big earth gas sampling of the change in resistance of bleeding to the negative pressure index.Therefore directly using air sampler, to carry out the sampling of earth gas be inappropriate.
The purpose of this utility model is that existing air sampler is transformed, and provides a kind of and can produce bigger negative pressure, and gas flow is big and stable, and volume and weight are suitable for the earth gas sampling of field geological work condition.
The utility model comprises power supply, motor, electronic timer and gas meter, it is characterized in that said power supply is a direct supply, said motor is a micromachine, the pump case of said straight empty membrane pump is an integral body, is respectively equipped with packing washer between pump case and the vibration film and between vibration film and the fixed head.
The utility model has improved original vacuum film pump structure, has improved sealing property, can produce bigger negative pressure, satisfies the needs of earth gas sampling.In addition,, process and assemble is also greatly simplified, caused deformation of thin membrane to influence the phenomenon that motor rotates when having prevented two pump case split assemblings owing to adopted whole pump case.
The utility model without constant speed motor with common micromachine, mode with the control current of electric is regulated power of motor, and it is short sample time to have adapted to earth gas, the characteristics that various change in resistance are big, can in the process of sampling, obtain enough airshed ， And and guarantee the stable of flow in the time of bleeding.Owing to use micromachine, removed the Alternating Current Power Supply part in the air sampler again, make the volume and weight of this device all be more suitable for condition in field geological work.
Fig. 1 is a constructional device synoptic diagram of the present utility model.
Fig. 2 is the structural profile synoptic diagram of film vacuum pump of the present utility model.
Below in conjunction with accompanying drawing, the utility model is described in further detail with an embodiment.
As shown in Figure 1, present embodiment comprises power supply 1, motor 2, electronic timer 3, vacuum film pump 4 and gas meter 5.Wherein power supply 1 is made of electric battery, 9 volts of battery voltage designs.Motor 2 is commercially available micromachines of 9 volts of 2400 rev/mins.The time constant control of electronic timer was respectively 60 seconds and 120 seconds 30 seconds.Gas meter adopts range greater than 4 liters/minute spinner-type flowmeter.Circuit and gas circuit between above-mentioned each parts are connected by known mode.
As shown in Figure 2, the vacuum film pump of present embodiment promotes connecting rod 7 by fixed head 6, and vibration film 8 and whole pump case 9 are formed.It is affixed with vibration film 8 to promote connecting rod 7, and fixed head 6, vibration film 8 and pump case 9 threes are one by screw retention.Between fixed head 6 and vibration film 8, be provided with rubber washer 10, between vibration film 8 and pump case 9, be provided with rubber washer 11.On the direction vertical, be respectively equipped with air inlet film 12, air admission hole 13 and exhaust membrane 14, vent port 15 on the pump case 9 with vibration film 8.
Claims (2)
1, a kind of earth gas sampling, comprise power supply (1), motor (2), electronic timer (3), vacuum film pump (4) and gas meter (5) is characterized in that said power supply (1) is a direct supply, and said motor (2) is a micromachine, the pump case (9) of said vacuum film pump (4) is an integral body, is respectively equipped with packing washer (11), (10) between pump case (9) and the vibration film (8) and between vibration film (8) and the fixed head (6).
2, earth gas sampling as claimed in claim 1 is characterized in that said gas meter (5) is a maximum range greater than 4 liters/minute spinner-type flowmeter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90222911 CN2081977U (en) | 1990-10-29 | 1990-10-29 | Sampler of gas in soil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90222911 CN2081977U (en) | 1990-10-29 | 1990-10-29 | Sampler of gas in soil |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2081977U true CN2081977U (en) | 1991-07-31 |
Family
ID=4900774
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 90222911 Withdrawn CN2081977U (en) | 1990-10-29 | 1990-10-29 | Sampler of gas in soil |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2081977U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105784861A (en) * | 2016-03-04 | 2016-07-20 | 湖南农业大学 | Soil gas collecting device and gas collecting method |
-
1990
- 1990-10-29 CN CN 90222911 patent/CN2081977U/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105784861A (en) * | 2016-03-04 | 2016-07-20 | 湖南农业大学 | Soil gas collecting device and gas collecting method |
| CN105784861B (en) * | 2016-03-04 | 2017-12-26 | 湖南农业大学 | A kind of soil gas collection device and gas collection method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |