CN102749223B - Pneumatic pump sampling system device of multi-stage monitoring well and method thereof - Google Patents
Pneumatic pump sampling system device of multi-stage monitoring well and method thereof Download PDFInfo
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- CN102749223B CN102749223B CN201210252691.5A CN201210252691A CN102749223B CN 102749223 B CN102749223 B CN 102749223B CN 201210252691 A CN201210252691 A CN 201210252691A CN 102749223 B CN102749223 B CN 102749223B
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Abstract
The invention discloses a pneumatic pump sampling system device of a multi-stage monitoring well. The device is arranged inside a drilled multi-stage underground water monitoring well, wherein the well passes through a plurality of aquifers in depth; every two adjacent aquifers are mutually sealed and isolated; a water inlet window pup joint assembly is arranged on a local section of a well casing at the position of each monitoring layer after the well is formed; the water inlet window pup joint assembly comprises water inlet windows; a water inlet of each water inlet window is communicated with a water inlet pipe joint of a pneumatic pump; air supply outlets and water outlets of the pneumatic pumps are communicated with the earth surface respectively via an air supply pipe and a water outlet pipe; check valves are respectively arranged in water inlet and outlet pipelines of all the pneumatic pumps; at least one group of air supply units is arranged on the earth surface; each air supply unit is composed of an air source and an air adjuster in connection combination, and the outlet of each air adjuster at a working period is instantly connected with an air supply port requiring sampling. Water samples with component representativeness can be conveniently and fast extracted, and the pneumatic pump sampling system device is simple, practical and low in cost.
Description
Technical field
The present invention relates to groundwater pollute monitor technology, relate in particular to a kind of multistage monitor well air lift pump sampling system devices and methods therefor.
Background technology
At present, groundwater monitoring well form both domestic and external has clump formula monitor well, nido monitor well, multi-channel tube monitor well and multistage monitor well, and the developing direction of monitor well is towards the future development of a well multilayer monitoring and minor diameter.
Now the domestic device of adopting sampling of ground water adopts sample bucket and inertial pump more, and external air pocket pumps, vacuum pump (water level more than 8 meters time use) and the peristaltic pumps of adopting locality descend water sample more.How the monitor well of minor diameter take high quality water sample undoubtedly air pocket pump be the instrument of sampling preferably.But the air pocket pump that processing is less than 10mm diameter acquires a certain degree of difficulty, now domestic do not have this series products, though there is the air pocket pump of 8mm diameter abroad, price is very expensive, and sample loaded down with trivial detailsly, has inconvenience more.Based on above reason, limit the development of the multistage groundwater monitoring well of China, urgently find a kind of good methods to solve this problem.
Summary of the invention
The object of this invention is to provide a kind of multistage monitor well air lift pump sampling system device, it can extract easily and efficiently has the representational water sample of composition.
For achieving the above object, the present invention takes following design proposal:
A kind of multistage monitor well air lift pump sampling system device, this device is deployed to ensure effective monitoring and control of illegal activities in the multistage groundwater monitoring well of a bite Drilling, and the degree of depth of this well is through some water-bearing intervals;
Mutual airtight isolation between each adjacent aquifers section;
At each monitor layer position of Cheng Jinghou well casing local segment, window of receiving water pipe nipple assembly is installed, comprise out window of receiving water, the water inlet of each window of receiving water is connected with the admitting pipe joint of an air lift pump, the air taking port of these air lift pumps and water delivering orifice are communicated to earth's surface via snorkel and rising pipe respectively, in the water inlet of each air lift pump and the pipeline of water outlet, are respectively equipped with check (non-return) valve;
On earth's surface, be at least provided with one group of air supply unit, this air supply unit is connected and constitutes with air governor by a source of the gas, and the outlet of the air governor of working hour is connected immediately with the air outlet that needs sampling.
Described monitor layer is arranged on each water-bearing interval, or chooses some of water-bearing intervals respectively as monitor layer; At least establish a monitoring point at each monitor layer, if while being provided with plural monitoring point, each monitoring point is located on differing heights point.
Described multistage groundwater monitoring well is minor diameter drilling well, and the diameter of its drilling well well casing is to contain all snorkel and rising pipes that are connected use with monitoring point air lift pump.
In described multistage monitor well air lift pump sampling system device, described source of the gas adopts air compressor machine or gas cylinder.
Another object of the present invention is to provide a kind of multistage monitor well air lift pump sampling method, and it has very high practicality and advance.
For achieving the above object, the present invention takes following design proposal:
A kind of multistage monitor well air lift pump sampling method, is characterized in that method step is as follows:
1) the multistage groundwater monitoring well of Drilling a bite first, the degree of depth of this Drilling well is through some layers of water-bearing section;
2) choose monitor layer and establish monitoring point, and Cheng Jing;
3) by airtight separating between the underground water of monitoring point place adjacent layer;
4) in the well casing section of position, the corresponding each monitoring point of each monitor layer, window of receiving water pipe nipple assembly is installed, comprise and offer window of receiving water, the water inlet of each window of receiving water is connected with the admitting pipe joint of an air lift pump, and air taking port and the water delivering orifice of these air lift pumps are communicated to earth's surface by delivery pipe respectively;
5) on earth's surface, be provided with at least one group of air supply unit, this air supply unit is connected and constitutes with air governor by a source of the gas;
6) air governor is connected with the air outlet that needs sampling monitoring point, by source of the gas and air governor, to pressurising in air lift pump, pressure release, conversion repeatedly, until the water outlet delivery pipe that makes underground water pass through this monitoring point proposes earth's surface.
In described multistage monitor well air lift pump sampling method, the concrete grammar of establishing monitoring point is: monitoring point is chosen at the location of good water permeability in this monitor layer; Set up plural monitoring point for bed thickness and the heavy monitor layer of pollution, each monitoring site is in different high positions.
In described multistage monitor well air lift pump sampling method, by the airtight concrete grammar separating between the underground water of monitoring point place adjacent layer be: according to becoming well well tubular wall and treating interval design the prefabricated a pair of expanded rubber cover between the brill sinking lining of airtight isolating points position, first adjust the distance of two expanded rubbers covers between upper and lower according to the water intaking thickness requirement of place, monitoring point to be sealed monitor layer, by under a pair of expanded rubber cover of adjusting to position place, monitoring point to be sealed in Drilling well, it meets after water expansion naturally and by airtight separating between the underground water of this monitoring point adjacent layer.
In described multistage monitor well air lift pump sampling method, the water level of sampling monitoring layer is darker, and the distance that sampling monitoring is put water level is larger, larger to the pressurising in air lift pump by source of the gas and air governor.
In described multistage monitor well air lift pump sampling method, the distance that sampling monitoring is put water level is larger, and described source of the gas and air governor are larger to the ratio of pressurising time in air lift pump and pressure release time.
The multistage monitor well air lift pump of the present invention Sampling techniques are domestic initiations, have made up the deficiency of existing multistage monitor well sampling craft, have simplified the structure of sampler.Tool has an enormous advantage compared with external multistage monitor well sampling craft, and the cost of especially sampling is approximately one of the percentage of cost of abroad sampling.
Advantage of the present invention is:
1. utilize the monitor well of a bite minor diameter both can carry out monitoring and the same layer differing heights groundwater monitoring of multi-layer Underground Water, simple, practicality, with low cost, has distinct Chinese characteristics;
2. every layer of underground water in when sampling is only used unique ajutage and unique rising pipe, and ajutage and rising pipe thinner, can reduce like this time swap of well water, can extract easily and efficiently and there is the representative and highly representational water sample of composition;
3. the water sample actual position of tested point is accurate, can collect the water sample that contains volatile organic matter, is applicable to China's actual conditions, has very high practicality and advance.
Brief description of the drawings
Fig. 1 is the one-tenth well of the multistage monitor well of the present invention and the schematic diagram of built-in sampling system part.
Fig. 2 is the multistage monitor well air lift pump of the present invention sampling system device principle of compositionality schematic diagram.
Fig. 3 is the structural representation of air lift pump of the present invention.
Fig. 4 is the principle of work schematic diagram (state one) of air lift pump of the present invention.
Fig. 5 is the principle of work schematic diagram (state two) of air lift pump of the present invention.
Fig. 6 is the principle of work schematic diagram (state three) of air lift pump of the present invention.
Fig. 7 is the principle of work schematic diagram (state four) of air lift pump of the present invention.
Below in conjunction with drawings and the specific embodiments, the present invention is described further.
In Fig. 1: 1. monitor well, 2. obturator, 3. becomes well, 4. air lift pump, 43. water inlet pipes, 5. rising pipe, 6. snorkel, 7. rock stratum section.
In Fig. 2: 1. monitor well well casing, 2. monitor well hole wall, 3. water inlet pipe, 4. air lift pump, 5. window of receiving water, 6. closure, 7. static level, 8. rising pipe, 9. ajutage, 10. regulator, 11. sources of the gas.
In Fig. 3: 4. air lift pump, 41. pump housings, 42. air outlets, 43. water inlet pipes, 44. water inlet retaining valves, 45. rising pipes, 46. water delivering orifice retaining valves.
In Fig. 4 to Fig. 7: 1. monitor well well casing, 2. water inlet pipe, 3. water inlet retaining valve, 4. water delivering orifice retaining valve, the 5. water surface stroke distances of ajutage, 6. underground water static level, 7. rising pipe, 8. ajutage, 9. air governor, 10. source of the gas.
Embodiment
The invention provides the multistage monitor well air lift pump of a kind of underground water sampling technique (comprising the method for system and device and sampling), this kind of technology can be monitored several layers or the tens of layers underground water with a certain altitude response in a monitor well.Embodiment as shown in Figure 1, first to complete the setting of multistage monitor well air lift pump sampling system device: first Drilling a bite degree of depth through multilayer water-bearing section 7(in other words well depth exceed the some rice of water level) multistage groundwater monitoring well 1, choose monitor layer and establish monitoring point, and utilize into well technology and be created as well 3, to between the underground water of monitoring point place adjacent layer, separate with obturator 2, in the present embodiment, be according to becoming well well tubular wall and treating interval design the prefabricated a pair of expanded rubber cover between the brill sinking lining of airtight isolating points position, utilize the characteristic of expanded rubber water-swellable well to realize smooth and easy installing and good airtight function, also can adopt other means to realize airtight.
In the position of needs monitoring, window of receiving water pipe nipple assembly is installed, described window of receiving water pipe nipple assembly comprises offers window of receiving water, and in window of receiving water outside, filtrator is installed, and as parcel screen pack, preferably adopts two-layer stainless steel screen pack.Near the upper and lower two ends, well casing outside of window of receiving water, locking device is installed, the well casing the inside (water inlet) of window of receiving water is connected with the water inlet pipe 43 of an air lift pump 4, and the air taking port of air lift pump can be tiny plastic tube by snorkel 6 with rising pipe 5(respectively with water delivering orifice) be connected and lead to earth's surface.Window of receiving water pipe nipple assembly is actual is a part for well casing, be connected to the depth location that needs monitoring, monitoring point number in the number of plies that the quantity of its installation is monitored by needs and every layer determines, set up 3 monitoring points in embodiment illustrated in fig. 1, therefore 3 window of receiving water pipe nipple assemblies are installed.
For helping to understand, Fig. 2 shows the principle of compositionality schematic diagram of the multistage monitor well air lift pump of the present invention sampling system device one specific embodiment, comprises monitor well well casing 1, monitor well hole wall 2, water inlet pipe 3, air lift pump 4, window of receiving water 5, closure 6, static level 7, rising pipe 8, ajutage 9, regulator 10 and source of the gas 11.
The structure of described air lift pump 4 forms and can, referring to Fig. 3, be made up of the pump housing 41, air outlet 42, rising pipe 45, water delivering orifice retaining valve 46, water inlet pipe 43 and water inlet retaining valve 44.The residing position of the pump housing is in the inside of window of receiving water, and the air outlet of the pump housing is connected to earth's surface by minor diameter plastic tube, check (non-return) valve (water delivering orifice retaining valve 46) is installed in the rising pipe of the pump housing and is also connected to earth's surface, and the effect of check (non-return) valve is the aqueous reflux that prevents water delivering orifice.The water inlet of the pump housing is installed check (non-return) valve (water inlet retaining valve 44) and is connected with window of receiving water, is actually identical with water-bearing zone, and the effect of check (non-return) valve is to allow the water on stratum to enter the pump housing, obstructed on the contrary.
Described source of the gas can be air compressor machine or the gas cylinder of filling certain pressure air.
The present invention can establish by following principle in the time selecting monitor layer and monitoring point: monitoring point is chosen at the location (as sand bed location, as far as possible avoiding cohesive soil location) of good water permeability; For bed thickness and pollute heavy monitor layer and can establish monitoring point more, different monitoring sites is (upper and lower as at this interval, or position, upper, middle and lower) in different high positions.
Adopt a large characteristic of the technology of the present invention, the monitor well diameter that is Drilling can be according to the needs of monitoring point quantity and designed size, when not a lot of for monitoring point quantity, monitor well diameter can Drilling must less (embodiment as shown in Figure 1, monitor well diameter 55 ~ 80mm can meet the demands), can normally deploy to ensure effective monitoring and control of illegal activities and carry all rising pipes and ajutage as satisfied prerequisite.
According to the difference of position, each monitoring point, can also be different to time and the size of pressurising in air lift pump by source of the gas and air governor: the water level of sampling monitoring layer is darker, the distance that sampling monitoring is put water level is larger, larger to the pressurising in air lift pump by source of the gas and air governor; The distance that sampling monitoring is put water level is larger, also relative larger with the ratio of pressure release time to the pressurising time in air lift pump with air governor by source of the gas.
Need to sample time, the source of the gas on earth's surface is connected with air governor, the outlet of air governor is connected with air outlet, reaches the object of extracting sample.
The course of work and the air lift pump principle of work of the multistage monitor well air lift pump of the present invention Sampling techniques are: complete after the arranging of multistage monitor well air lift pump sampling system device, original state when source of the gas 10 and air governor 9 are not worked can be referring to Fig. 4, underground water is opened water inlet retaining valve 3 by water inlet pipe 2 under pressure and is entered the pump housing, one tunnel enters ajutage 8, the water surface that makes ajutage 8 the insides is natural water level 6 substantially, an other road is opened water delivering orifice retaining valve 4 and is entered rising pipe 7, and the water level of rising pipe the inside is also natural water level 6 substantially.When after source of the gas 10 and air governor 9 work, the water surface that the blast of ajutage 8 the insides increases 8 li of compression ajutages makes it open water delivering orifice retaining valve 4 and enters rising pipe, a stroke S1 of water level rising who makes rising pipe 7, now water inlet retaining valve 2 is that the aqueous reflux to prevent the pump housing of closing enters water-bearing zone; As shown in Figure 5.In the time of air governor 9 pressure release, the air pressure of ajutage 8 the insides reduces, the water on stratum can be opened again water inlet retaining valve 2 and enter into the pump housing, make a stroke S of water surface rising of ajutage 8 the insides, reset into original position, and now water delivering orifice retaining valve 4 is closed, the aqueous reflux that prevents rising pipe goes back to stratum, as shown in Figure 6.In the time of air governor 9 repressurize, the air pressure of ajutage 8 the insides makes the water level of the rising pipe 7 stroke S2 that rises again, so repeatedly the water extraction on stratum is gone out to earth's surface, as shown in Figure 7.
The various embodiments described above can some variations in addition under not departing from the scope of the present invention, thus above explanation comprise should be considered as exemplary, but not in order to limit the protection domain of the present patent application patent.
Claims (5)
1. a multistage monitor well air lift pump sampling method, is characterized in that method step is as follows:
1) the multistage groundwater monitoring well of Drilling a bite first, the degree of depth of this Drilling well is through some layers of water-bearing section;
2) choose monitor layer and establish monitoring point, and Cheng Jing;
3) by airtight separating between the underground water of monitoring point place adjacent layer;
4) in the well casing section of position, the corresponding each monitoring point of each monitor layer, window of receiving water pipe nipple assembly is installed, comprise and offer window of receiving water, the water inlet of each window of receiving water is connected with the admitting pipe joint of an air lift pump, this air lift pump is made up of the pump housing, air outlet, rising pipe, water delivering orifice retaining valve, water inlet pipe and water inlet retaining valve integral type, the air outlet of the pump housing of these air lift pumps is connected to earth's surface by minor diameter plastic tube, water delivering orifice is communicated to earth's surface by delivery pipe, and check (non-return) valve is installed in the rising pipe of the pump housing and water inlet pipe;
5) on earth's surface, be provided with at least one group of air supply unit, this air supply unit is connected and constitutes with air governor by a source of the gas;
6) air governor is connected with the air outlet that needs sampling monitoring point, by source of the gas and air governor to pressurising in air lift pump, pressure release, specific implementation method is: first, open water inlet retaining valve by water inlet pipe and enter under pressure the pump housing by underground water, Zai Yi road enters ajutage, and making the water surface of ajutage the inside is natural water level; An other road water is opened water delivering orifice retaining valve and is entered rising pipe, and the water level of rising pipe the inside is also natural water level; Start source of the gas and air governor, the water surface in compression ajutage makes it open water delivering orifice retaining valve and enters rising pipe, allows the water level of the rising pipe stroke that rises; Then, air governor pressure release, the water on stratum is opened water inlet retaining valve and is entered into the pump housing, a stroke of water surface rising of ajutage the inside; Air governor repressurize, makes the water level of the rising pipe stroke that rises again; So repeatedly the water extraction on stratum is gone out to earth's surface, conversion so repeatedly, until the water outlet delivery pipe that makes underground water pass through this monitoring point proposes earth's surface.
2. multistage monitor well air lift pump sampling method according to claim 1, is characterized in that: the concrete grammar of described establishment monitoring point is: monitoring point is chosen at the location of good water permeability in this monitor layer; Set up plural monitoring point for bed thickness and the heavy monitor layer of pollution, each monitoring site is in different high positions.
3. multistage monitor well air lift pump sampling method according to claim 1, is characterized in that: describedly by the airtight concrete grammar separating between the underground water of monitoring point place adjacent layer be: according to becoming well well tubular wall to bore the also prefabricated a pair of expanded rubber cover of interval design between sinking lining with treating airtight isolating points position; First adjust the distance of two expanded rubbers covers between upper and lower according to the water intaking thickness requirement of place, monitoring point to be sealed monitor layer, by under a pair of expanded rubber cover of adjusting to position place, monitoring point to be sealed in Drilling well, it meets after water expansion naturally and by airtight separating between the underground water of this monitoring point adjacent layer.
4. multistage monitor well air lift pump sampling method according to claim 1, is characterized in that: the water level of sampling monitoring layer is darker, and the distance that sampling monitoring is put water level is larger, larger to the pressurising pressure in air lift pump by source of the gas and air governor.
5. multistage monitor well air lift pump sampling method according to claim 1, is characterized in that: the distance that sampling monitoring is put water level is larger, and described source of the gas and air governor are larger to the ratio of pressurising time in air lift pump and pressure release time.
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| CN201210252691.5A CN102749223B (en) | 2012-07-20 | 2012-07-20 | Pneumatic pump sampling system device of multi-stage monitoring well and method thereof |
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| CN201210252691.5A CN102749223B (en) | 2012-07-20 | 2012-07-20 | Pneumatic pump sampling system device of multi-stage monitoring well and method thereof |
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| CN102749223B true CN102749223B (en) | 2014-11-05 |
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| CN103174414B (en) * | 2013-03-26 | 2016-07-13 | 中国地质调查局水文地质环境地质调查中心 | Original position fluid sampling apparatus in a kind of deep-well well |
| CN107328903A (en) * | 2017-07-05 | 2017-11-07 | 河北工程大学 | Shallow Groundwater Pollution thing monitoring system |
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| CN108088976B (en) * | 2017-12-11 | 2020-08-14 | 靳职雄 | Underground water monitoring system |
| CN108168645B (en) * | 2018-03-23 | 2024-01-23 | 中国矿业大学(北京) | Multi-layer section simultaneous-measurement casing pipe and observation well |
| CN110031262B (en) * | 2019-03-28 | 2023-12-01 | 中国地质调查局水文地质环境地质调查中心 | Low-flow low-disturbance layered sampling device and sampling method thereof |
| CN110132650B (en) * | 2019-04-30 | 2021-11-09 | 同济大学 | Sampling method for underground water well group in polluted site |
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| CN111022036B (en) * | 2019-10-23 | 2022-12-06 | 核工业北京化工冶金研究院 | Method for detecting damage of well pipe |
| CN111425186A (en) * | 2020-04-28 | 2020-07-17 | 北京市地质工程勘察院 | Shallow underground water small-caliber cluster type monitoring well and well completion method thereof |
| CN111411901A (en) * | 2020-04-28 | 2020-07-14 | 北京市地质工程勘察院 | Small-caliber shallow groundwater nested monitoring well and well completion method thereof |
| CN112924232B (en) * | 2021-03-08 | 2022-05-10 | 中国人民解放军63653部队 | Four-channel gas-driven type underground water continuous sampling device |
| CN113375986B (en) * | 2021-07-23 | 2023-10-13 | 北京爱地地质勘察基础工程公司 | Air bag type soil gas monitoring well structure and application method thereof |
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