CN1226606C - Negative pressure synchronous collection method of soil profile gradient gas sample and its special equipment - Google Patents
Negative pressure synchronous collection method of soil profile gradient gas sample and its special equipment Download PDFInfo
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- CN1226606C CN1226606C CN 01133334 CN01133334A CN1226606C CN 1226606 C CN1226606 C CN 1226606C CN 01133334 CN01133334 CN 01133334 CN 01133334 A CN01133334 A CN 01133334A CN 1226606 C CN1226606 C CN 1226606C
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- depression drainage
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Abstract
The present invention relates to a negative pressure synchronous collection method of soil profile gradient gas samples and a special device. The method comprises: a group of gas well units is vertically put into different positions at the same soil profile to be tested, and the gas well units are connected with pipe fittings and a negative pressure device; before gas is collected, residual gas in a gas well and the pipe fittings is removed by the negative pressure device, and gas to be tested in different positions of the soil profile is diffused into the pipe fittings through the gas inlets of the gas well units, fully balanced and then synchronously collected. The device is composed mainly of the gas well and the negative pressure device, wherein the gas well is composed of a plurality of gas well units with gas inlets and gas outlets; the negative pressure device is composed of a plurality of negative pressure devices matched and connected with the gas well, an external force applying plate on the negative pressure drainage devices, and a supporting plate below the negative pressure drainage devices; the gas outlets in the gas well units are connected with the negative pressure drainage devices in the negative pressure device through the pipe fittings installed together with the gas outlets. By the present invention, gas with different gradients at the same soil profile and gas with different gradients at different soil profiles are synchronously collected.
Description
Technical field
The present invention relates to the soil gas sample collecting in agricultural, forestry and the Environmental Studies, specifically a kind of negative pressure synchronous collection method of soil profile gradient gas sample and isolated plant.
Background technology
The nondestructive collection method of soil profile gaseous sample receives much attention always.For a long time, people are when solving soil profile diverse location place gas collecting, usual way or be the gas sample (as shown in Figure 1) that obtains different soil body sections one by one, it is the gas sample (as shown in Figure 2) that obtains same soil body section diverse location place one by one, consequently all be difficult to realize the gas synchronous acquisition of same soil body section, different gradients, all adopt the manual sampling one by one of syringe.
Summary of the invention
In order to overcome the deficiency of single collection in the prior art, the purpose of this invention is to provide a kind of negative pressure synchronous collection method and the isolated plant that can realize the soil profile gradient gas sample of synchronous acquisition to the gas of different gradients of same soil profile and the different gradients of different soils section.
To achieve these goals, technical scheme of the present invention is: the same section diverse location of soil to be measured place is vertically inserted in one group of gas well unit, and each gas well unit links to each other with negative pressure device with pipe fitting; Before the gas collecting, the application of negative pressure device is removed the residual gas in gas well and the pipe fitting, and the gas to be measured at soil profile diverse location place is put pipe fitting through the air admission hole diffusion of gas well unit, is fully carrying out the gas synchronous acquisition after the balance;
One group of gas well unit is inserted the different soil body section of soil to be measured diverse location place respectively, and each gas well unit links to each other with negative pressure device with pipe fitting;
Its isolated plant mainly is made up of gas well, negative pressure device, and wherein gas well is made up of a plurality of gas wells unit, and each cell height is decided according to the sampling gradient, has air admission hole, venthole on it; Negative pressure device by a plurality of depression drainage devices that are connected with gas well coupling, place the force application board that applies external force on the depression drainage device and place the back up pad under the depression drainage device to constitute; Venthole is respectively by being connected with depression drainage device in the negative pressure device with its pipe fitting that is installed together in the gas well unit of described gas well;
Described air admission hole is covered by steel mesh; Described venthole is a base that is solidly installed with the gas well cell body; Described force application board is provided with the fixing hole of using that is used to install depression drainage device; Described back up pad is provided with the boss that is used to the air dead space depression drainage device being installed and being got rid of depression drainage device; Described depression drainage device is the plastic cylinder that the middle part is provided with spring, or has a plastic cylinder of pleated structure, establish scavenge port, air intake opening and fixed part respectively in the right cylinder upper end, boss closely cooperates and is installed together on cylindrical base and the described back up pad, fixing on fixed part and the force application board cooperates installation with the hole, and air intake opening is connected by the venthole of pipe fitting with each gas well unit.
The present invention has as above advantage: the present invention is by manual operations, method is simple, be suitable for the synchronous acquisition of the different gradient gas of same soil profile or the synchronous acquisition of the different gradient gas of different soils section, can be conveniently used in fields such as agricultural, forestry and Environmental Studies.
Description of drawings
Fig. 1 is the synoptic diagram of collection one by one of the different gradient gas samples of different sections in the prior art.
Fig. 2 is the synoptic diagram of collection one by one of the different gradient gas samples of same soil body section in the prior art.
Fig. 3 is an isolated plant structural representation of the present invention.
Fig. 4 a is a gas well cellular construction synoptic diagram among Fig. 3.
Fig. 4 b is a force application board structural representation in the negative pressure device among Fig. 3.
Fig. 4 c is a supporting plate structure synoptic diagram in the negative pressure device among Fig. 3.
Fig. 4 d is another example structure synoptic diagram of depression drainage device in the negative pressure device among Fig. 3.
Fig. 5 a is positioned at the scheme of installation that is connected of soil surface and pipe fitting for the one embodiment of the invention negative pressure device.
Fig. 5 b is arranged in the scheme of installation that is connected of heatable adobe sleeping platform and pipe fitting for the another embodiment of the present invention negative pressure device.
Embodiment
Embodiment 1
The negative pressure synchronous collection method of a kind of soil profile gradient gas sample of the present invention is that the same section diverse location of soil to be measured place is vertically inserted in one group of gas well unit 11, link to each other with negative pressure device 2 synchronous acquisition of the gas sample of realizing same soil body section, different gradients of each gas well unit 11 and pipe fitting 3; Before the gas collecting, application of negative pressure device 2 is removed the residual gas in gas well 1 and the pipe fitting 3, and the gas to be measured at soil profile diverse location place is put pipe fitting 3 through air admission hole 12 diffusions of gas well unit 11, is fully carrying out the gas synchronous acquisition after the balance;
Isolated plant of the present invention is shown in Fig. 3, Fig. 4 a～4d, mainly form by gas well 1, negative pressure device 2, wherein gas well 1 is connected together by 10 gas well unit 11 (n=10) series welding, each cell height is decided according to the sampling gradient, have air admission hole 12, venthole 13 on it, described air admission hole 12 is covered by steel mesh, and described venthole 13 is a base that is solidly installed with gas well unit 11 bodies; Negative pressure device 2 by 10 depression drainage devices 21 that are connected with gas well unit 11 coupling in the gas well 1, place the force application board that applies external force 22 on the depression drainage device 21 and place the back up pad 23 under the depression drainage device 21 to constitute, described force application board 22 is provided with the fixing usefulness hole 221 that is used to install depression drainage device 21; Described back up pad 23 is provided with the boss 231 that is used to the air dead space depression drainage device 21 being installed and being got rid of depression drainage device 21; Venthole 13 is respectively by being connected with depression drainage device 21 in the negative pressure device 2 with its pipe fitting that is installed together 3 in the gas well unit 11 of described gas well 1;
Described depression drainage device 21 is provided with the plastic cylinder 212 of spring 211 for the middle part, establish scavenge port 213, air intake opening 215 and fixed part 214 respectively in right cylinder 212 upper ends, boss 231 closely cooperates and is installed together on the base of right cylinder 212 and the described back up pad 23, fixing on fixed part 214 and the force application board 22 cooperates installation with hole 221, and air intake opening 215 is connected with the venthole 13 of each gas well unit 11 by pipe fitting 3.
Shown in Fig. 5 a, together place into the soil (pvc pipe spare 3 will be exposed to outside the soil with the link of depression drainage device 21) in the section together with pvc pipe spare 3 in the gas well unit 11 that will weld together, and negative pressure device 2 on the ground; Before the gas collecting, application of negative pressure device 2 is removed the residual gas in gas well 1 and the pvc pipe spare 3, again with the exposed ends sealing of one section emulsion tube with pvc pipe spare 3; The gas to be measured at soil profile diverse location place is put pvc pipe spare 3 through air admission hole 12 diffusions of gas well unit 11, fully just can carry out gas collecting after the balance, and the concrete operations step is as follows:
The first step: at first depression drainage device 21 is placed on the boss 231 of back up pad 23, again force application board 22 is placed on the depression drainage device 21, the fixed part 214 of flow diverter is identical with the fixed orifice 221 on the force application board 22;
Second step: act on the force application board 22 with external force, depression drainage device 21 is compressed, air in the depression drainage device 21 is got rid of gradually and is formed negative pressure therein, at this moment the air intake opening 215 of depression drainage device 21 is connected to the exposed ends of pvc pipe spare 3, and this moment, the external force effect remained;
The 3rd step: remove external force: depression drainage device 21 is upheld gradually under the resilient force of spring 211, and the negative pressure in the depression drainage device 21 reduces gradually, and gas well unit 11 is collected automatically with the gas in the pvc pipe spare 3;
The 4th step: the air intake opening 215 of interlinear notes the depression drainage device 21 or gas in the depression drainage device 21 is input among the airbag.
The dimension of gas well of the present invention unit 11, required gas well unit 11 and depression drainage device 21 numbers and pvc pipe spare 3 length depend on research purpose.
Embodiment 2
Difference from Example 1 is:
The negative pressure synchronous collection method of soil profile gradient gas sample of the present invention is that one group of gas well unit 11 is inserted the different soil body section of soil to be measured diverse location place respectively, each gas well unit 11 links to each other with negative pressure device 2 with pipe fitting 3, realizes the synchronous acquisition of the gas sample of different soil body sections, different gradients; Before the gas collecting, application of negative pressure device 2 is removed the residual gas in gas well 1 and the pipe fitting 3, and the gas to be measured at soil profile diverse location place is put pipe fitting 3 through air admission hole 12 diffusions of gas well unit 11, is fully carrying out the gas synchronous acquisition after the balance;
Described depression drainage device 21 is one to have the plastic cylinder 212 of pleated structure; During operation: one group of gas well unit 11 is inserted the different soil body section of soil to be measured diverse location place respectively, each gas well unit 11 links to each other with negative pressure device 2 with pipe fitting 3, shown in Fig. 5 b, gas well 1 of the present invention is installed in the heatable adobe sleeping platform with the level that is connected of pvc pipe spare 3 together with negative pressure device 2.
Claims (8)
1. the negative pressure synchronous collection method of a soil profile gradient gas sample, it is characterized in that: the same section diverse location of soil to be measured place is vertically inserted in one group of gas well unit, and each gas well unit links to each other with negative pressure device with pipe fitting; Before the gas collecting, the application of negative pressure device is removed the residual gas in gas well and the pipe fitting, and the air admission hole of gas to be measured through the gas well unit at soil profile diverse location place diffuses to pipe fitting, is fully carrying out the gas synchronous acquisition after the balance.
2. according to the described acquisition method of claim 1, it is characterized in that: one group of gas well unit is inserted the different soil body section of soil to be measured diverse location place respectively, and each gas well unit links to each other with negative pressure device with pipe fitting.
3. isolated plant according to the described acquisition method of claim 1, it is characterized in that: mainly form by gas well (1), negative pressure device (2), wherein gas well (1) is made up of a plurality of gas wells unit (11), each cell height is decided according to the sampling gradient, has air admission hole (12), venthole (13) on it; Negative pressure device (2) by a plurality of depression drainage devices (21) that are connected with gas well (1) coupling, place the force application board that applies external force (22) on the depression drainage device (21) and place back up pad (23) formation under the depression drainage device (21); Venthole (13) is respectively by being connected with depression drainage device (21) in the negative pressure device (2) with its pipe fitting that is installed together (3) in the gas well unit (11) of described gas well (1).
4. according to the isolated plant of the described acquisition method of claim 3, it is characterized in that: described air admission hole (12) is covered by steel mesh.
5. according to the isolated plant of the described acquisition method of claim 3, it is characterized in that: described venthole (13) is a base that is solidly installed with gas well unit (11) body.
6. according to the isolated plant of the described acquisition method of claim 3, it is characterized in that: described force application board (22) is provided with and is used to install the fixing with hole (221) of depression drainage device (21).
7. according to the isolated plant of the described acquisition method of claim 3, it is characterized in that: described back up pad (23) is provided with the boss (231) that is used to the air dead space depression drainage device (21) being installed and being got rid of depression drainage device (21).
8. according to the isolated plant of the described acquisition method of claim 3, it is characterized in that: described depression drainage device (21) is provided with the plastic cylinder (212) of spring (211) for the middle part, or has a plastic cylinder (212) of pleated structure, establish scavenge port (213) respectively in right cylinder (212) upper end, air intake opening (215) and fixed part (214), the last boss (231) of the base of right cylinder (212) and described back up pad (23) closely cooperates and is installed together, fixing on fixed part (214) and the force application board (22) cooperates installation with hole (221), and air intake opening (215) is connected with the venthole (13) of each gas well unit (11) by pipe fitting (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01133334 CN1226606C (en) | 2001-10-24 | 2001-10-24 | Negative pressure synchronous collection method of soil profile gradient gas sample and its special equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01133334 CN1226606C (en) | 2001-10-24 | 2001-10-24 | Negative pressure synchronous collection method of soil profile gradient gas sample and its special equipment |
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| CN1414362A CN1414362A (en) | 2003-04-30 |
| CN1226606C true CN1226606C (en) | 2005-11-09 |
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| CN 01133334 Expired - Fee Related CN1226606C (en) | 2001-10-24 | 2001-10-24 | Negative pressure synchronous collection method of soil profile gradient gas sample and its special equipment |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101413851B (en) * | 2008-12-02 | 2011-10-12 | 南京农业大学 | Flood and drought crop rotation paddy field soil gas in-situ acquiring system and method |
| CN102539194B (en) * | 2010-12-29 | 2013-07-31 | 中国石油天然气集团公司 | Gradient geochemical exploration method |
| CN103969403B (en) * | 2014-05-09 | 2015-07-22 | 哈尔滨工程大学 | Method for measuring uniformity of ammonia gas concentration in SCR (silicon controller rectifier) system pipeline |
| CN104181284B (en) * | 2014-07-11 | 2016-03-09 | 上海市政工程设计研究总院（集团）有限公司 | A kind of Volatile Organic Compounds in Soil continuous detection apparatus and detection method thereof |
| CN104316368B (en) * | 2014-11-12 | 2017-01-11 | 环境保护部南京环境科学研究所 | Automatic sampler and sampling method for soil profile gas of refuse landfill |
| 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 |
| CN108444776A (en) * | 2018-04-08 | 2018-08-24 | 湖北大学 | The sampler and its sampling method of soil column longitudinal direction soil layer gas |
| CN109959772B (en) * | 2019-03-13 | 2021-09-07 | 中国地质科学院水文地质环境地质研究所 | In-situ monitoring test device and method for soil leaching |
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