CN102749223A - 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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- CN102749223A CN102749223A CN2012102526915A CN201210252691A CN102749223A CN 102749223 A CN102749223 A CN 102749223A CN 2012102526915 A CN2012102526915 A CN 2012102526915A CN 201210252691 A CN201210252691 A CN 201210252691A CN 102749223 A CN102749223 A CN 102749223A
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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 the 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 develops towards the direction of well multilayer monitoring and minor diameter.
The device of water sample adopts sample bucket and inertial pump more under the present domestic fief, and external air bag pump, vacuum pump (water level used in time more than 8 meters) and the peristaltic pumps of adopting are gathered the underground water sample more.How the monitor well of minor diameter take the high quality water sample undoubtedly the air bag pump be the instrument of sampling preferably.But processing acquires a certain degree of difficulty less than the air bag pump of 10mm diameter, and now domestic do not have this series products, though the air bag pump of 8mm diameter is abroad arranged, price is very expensive, and it is loaded down with trivial details to take a sample, and inconvenience is arranged more.Based on above reason, limited the development of the multistage groundwater monitoring well of China, demand urgently finding a kind of good methods to solve this problem.
Summary of the invention
The purpose 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 realizing above-mentioned purpose, 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 passed some water-bearing intervals;
Mutual airtight isolation between each adjacent water-bearing interval;
Each monitor layer position well casing local segment at Cheng Jinghou is installed window of receiving water pipe nipple assembly; Comprise and drive the water window into; 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 the face of land via snorkel and rising pipe respectively, in the pipeline of the water inlet of each air lift pump and water outlet, are respectively equipped with check (non-return) valve;
On the face of land, be provided with one group of air supply unit at least, this air supply unit is connected with air governor by a source of the gas and constitutes, and the outlet of the air governor of working hour is connected with the air outlet that needs sampling immediately.
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 when being provided with plural monitoring point, each monitoring point is located on the differing heights point.
Described multistage groundwater monitoring well is the minor diameter drilling well, and the diameter of its drilling well well casing is for can contain all are connected usefulness with the monitoring point air lift pump snorkel and rising pipe.
In the said 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 provides a kind of multistage monitor well air lift pump sampling method, and it has very high practicality and advance.
For realizing above-mentioned purpose, 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 following:
1) the multistage groundwater monitoring well of Drilling a bite at first, the degree of depth of this Drilling well is passed the several layers water-bearing section;
2) choose monitor layer and establishment monitoring point, and Cheng Jing;
3) airtight separating between the underground water of adjacent layer located in the monitoring point;
4) in the well casing section of corresponding each position, 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 the air taking port and the water delivering orifice of these air lift pumps are communicated to the face of land by delivery pipe respectively;
5) on the face of land, be provided with at least one group of air supply unit, this air supply unit is connected with air governor by a source of the gas and constitutes;
6) air governor is connected with the air outlet that needs sampling monitoring point, through source of the gas and air governor pressurising in air lift pump, pressure release, conversion repeatedly proposes the face of land until the water outlet delivery pipe that makes underground water pass through this monitoring point.
In the said multistage monitor well air lift pump sampling method, the concrete grammar of establishing the monitoring point is: the 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 the said multistage monitor well air lift pump sampling method; The monitoring point is located the airtight concrete grammar that separates is between the underground water of adjacent layer: according to becoming well well tubular wall and the interval design prefabricated a pair of expanded rubber cover of treating between the Drilling well borehole wall of airtight isolating points position also; Earlier adjust the distance of two expanded rubbers covers between up and down according to the water intaking thickness requirement of place, monitoring point to be sealed monitor layer; With a pair of expanded rubber cover of adjusting place, position, monitoring point to be sealed in the Drilling well down, it meets behind water expansion naturally and airtight separating between the underground water with this monitoring point adjacent layer.
In the said multistage monitor well air lift pump sampling method, the water level of sampling monitoring layer is dark more, and the distance that sampling monitoring is put water level is big more, and is big more by source of the gas and the pressurising of air governor in air lift pump.
In the said multistage monitor well air lift pump sampling method, the distance that sampling monitoring is put water level is big more, and said source of the gas and the air governor ratio of pressurising time and pressure release time in air lift pump is big more.
The multistage monitor well air lift pump of the present invention Sampling techniques are domestic initiations, have remedied the deficiency of existing multistage monitor well sampling technology, have simplified the structure of sampler.Compare with external multistage monitor well sampling technology and to have very big superiority, the cost of especially sampling is one of the percentage of cost of abroad sampling approximately.
Advantage of the present invention is:
1. utilize the monitor well of a bite minor diameter both can carry out a phreatic monitoring of multilayer and a same layer differing heights groundwater monitoring, simple, practical, with low cost, have distinct Chinese characteristics;
2. every layer of underground water in when sampling is only used unique ajutage and unique rising pipe, and ajutage is thinner with rising pipe, can reduce the time swap of well water like this, can extract easily and efficiently to have 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 fit to China's actual conditions, has very high practicality and advance.
Description of drawings
Fig. 1 is the one-tenth well of the multistage monitor well of the present invention and the synoptic diagram of built-in sampling system part.
Fig. 2 is the multistage monitor well air lift pump of a present invention sampling system device principle of compositionality synoptic diagram.
Fig. 3 is the structural representation of air lift pump of the present invention.
Fig. 4 is the principle of work synoptic diagram (state one) of air lift pump of the present invention.
Fig. 5 is the principle of work synoptic diagram (state two) of air lift pump of the present invention.
Fig. 6 is the principle of work synoptic diagram (state three) of air lift pump of the present invention.
Fig. 7 is the principle of work synoptic diagram (state four) of air lift pump of the present invention.
Below in conjunction with accompanying drawing and specific embodiment the present invention is done further explanation.
Among 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.
Among 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.
Among 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.
Among 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 (method that comprises system and device and sampling), this kind technology can be monitored several layers or the tens of layers of underground water with a certain altitude response in a monitor well.Embodiment as shown in Figure 1; At first will accomplish the setting of multistage monitor well air lift pump sampling system device: first Drilling a bite degree of depth is passed the multilayer water-bearing section 7 multistage groundwater monitoring well 1 of (well depth surpasses the some rice of water level in other words); Choose monitor layer and establish the monitoring point; And utilize into the well technology and be created as well 3; The monitoring point being located separate with obturator 2 between the underground water of adjacent layer, is according to becoming well well tubular wall and interval design and the prefabricated a pair of expanded rubber cover treated between the Drilling well borehole wall of airtight isolating points position in the present embodiment, utilizes the characteristic of expanded rubber water-swellable to come well to realize smooth and easy installing and good airtight function; It is airtight also can to adopt other means to realize.
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 at window of receiving water outside mounting filtering device, like the parcel screen pack, preferably adopts two-layer stainless steel screen pack.Locking device is installed near the two ends up and down in the well casing outside of window of receiving water; The well casing the inside (water inlet) of window of receiving water links to each other with the water inlet pipe 43 of an air lift pump 4, and the air taking port of air lift pump is connected and leads to the face of land with rising pipe 5 (can be tiny plastic tube) by snorkel 6 respectively with water delivering orifice.Window of receiving water pipe nipple assembly is actual to be the part of well casing; Be connected the depth location that needs monitoring; The quantity of its installation determines by the monitoring point number in the number of plies of needs monitorings and every layer, set up 3 monitoring points in embodiment illustrated in fig. 1, so 3 window of receiving water pipe nipple assemblies of installation.
For helping to understand; Fig. 2 shows the principle of compositionality synoptic 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 constitutes and can 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 referring to Fig. 3.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 the face of land through the minor diameter plastic tube, check (non-return) valve (water delivering orifice retaining valve 46) is installed in the rising pipe of the pump housing also is connected to the face of land, 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 linked to each other with window of receiving water, is actually identical with the water-bearing zone, and the effect of check (non-return) valve is to allow the water on stratum to get into the pump housing, and is then obstructed on the contrary.
Described source of the gas can be air compressor machine or the gas cylinder of filling the certain pressure air.
The present invention can establish by following principle when selecting monitor layer and monitoring point: the monitoring point is chosen at the location (like the sand bed location, as far as possible avoiding the cohesive soil location) of good water permeability; For bed thickness and pollute heavy monitor layer and can establish the monitoring point more, the different monitoring point is positioned at different high positions (upper and lower as at this interval, or position, upper, middle and lower).
Adopt a big characteristic of the present invention's technology; The monitor well diameter that is Drilling can be according to the needs of monitoring point quantity and designed size; For monitoring point quantity not really for a long time; But monitor well diameter Drilling gets 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 the ajutage prerequisite for satisfying.
Difference according to each position, monitoring point; Time and size by source of the gas and air governor pressurising in air lift pump can also be different: the water level of sampling monitoring layer is dark more; The distance that sampling monitoring is put water level is big more, and is big more by source of the gas and the pressurising of air governor in air lift pump; The distance that sampling monitoring is put water level is big more, and is also big relatively more by the ratio of source of the gas and air governor pressurising time and the pressure release time in air lift pump.
Source of the gas with the face of land when needing sampling is connected with air governor, and the outlet of air governor is connected with air outlet, reaches the purpose 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: after having accomplished being provided with of multistage monitor well air lift pump sampling system device; Original state when source of the gas 10 is not worked with air governor 9 can be referring to Fig. 4; Underground water is opened water inlet retaining valve 3 through water inlet pipe 2 under pressure and is got into the pump housing; One the tunnel gets into ajutage 8; Make that the water surface of ajutage 8 the insides is natural water level 6 basically, other one the tunnel opens water delivering orifice retaining valve 4 gets into rising pipe 7, and the water level of rising pipe the inside also is natural water level 6 basically.After source of the gas 10 and air governor 9 are worked; 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 entering rising pipes; Make the water level of the rising pipe 7 stroke S1 that rises, this moment, the water inlet retaining valve 2 was that the aqueous reflux to prevent the pump housing of closing is gone into the water-bearing zone; As shown in Figure 5.The air pressure of ajutage 8 the insides reduces when air governor 9 pressure releases; The water on stratum can be opened water inlet retaining valve 2 again and enter into the pump housing; Make promptly to reset into original position by the water surface of the ajutage 8 the insides stroke S that rises, and this moment, the water delivering orifice retaining valve 4 was closed; The aqueous reflux that prevents rising pipe goes back to the stratum, and is as shown in Figure 6.The air pressure of ajutage 8 the insides makes the water level of the rising pipe 7 stroke S2 that rises again when air governor 9 repressurizes, and the water with the stratum proposes the face of land so repeatedly, and is as shown in Figure 7.
Above-mentioned each embodiment can should be regarded as exemplary so above explanation comprises not departing from the scope of the present invention down in addition some variations, but not in order to limit the protection domain that the present invention applies for a patent.
Claims (9)
1. 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 passed some water-bearing intervals, it is characterized in that:
Mutual airtight isolation between each adjacent water-bearing interval;
Each monitor layer position well casing local segment at Cheng Jinghou is installed window of receiving water pipe nipple assembly; Comprise and drive the water window into; 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 the face of land via snorkel and rising pipe respectively, in the pipeline of the water inlet of each air lift pump and water outlet, are respectively equipped with check (non-return) valve;
On the face of land, be provided with one group of air supply unit at least, this air supply unit is connected with air governor by a source of the gas and constitutes, and the outlet of the air governor of working hour is connected with the air outlet that needs sampling immediately.
2. multistage monitor well air lift pump sampling system device according to claim 1, it is characterized in that: 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 when being provided with plural monitoring point, each monitoring point is located on the differing heights point.
3. multistage monitor well air lift pump sampling system device according to claim 1; It is characterized in that: described multistage groundwater monitoring well is the minor diameter drilling well, and the diameter of its drilling well well casing is for can contain all are connected usefulness with the monitoring point air lift pump snorkel and rising pipe.
4. multistage monitor well air lift pump sampling system device according to claim 1 is characterized in that: described source of the gas adopts air compressor machine or gas cylinder.
5.
A kind of multistage monitor well air lift pump sampling method is characterized in that method step is following:
1) the multistage groundwater monitoring well of Drilling a bite at first, the degree of depth of this Drilling well is passed the several layers water-bearing section;
2) choose monitor layer and establishment monitoring point, and Cheng Jing;
3) airtight separating between the underground water of adjacent layer located in the monitoring point;
4) in the well casing section of corresponding each position, 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 the air taking port and the water delivering orifice of these air lift pumps are communicated to the face of land by delivery pipe respectively;
5) on the face of land, be provided with at least one group of air supply unit, this air supply unit is connected with air governor by a source of the gas and constitutes;
6) air governor is connected with the air outlet that needs sampling monitoring point, through source of the gas and air governor pressurising in air lift pump, pressure release, conversion repeatedly proposes the face of land until the water outlet delivery pipe that makes underground water pass through this monitoring point.
6.
multistage monitor well air lift pump sampling method according to claim 5, it is characterized in that: the concrete grammar of said establishment monitoring point is: the 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.
7.
multistage monitor well air lift pump sampling method according to claim 5 is characterized in that: the airtight concrete grammar that separates is between the said underground water of the monitoring point being located adjacent layer: according to becoming well well tubular wall and the interval design prefabricated a pair of expanded rubber cover of treating between the Drilling well borehole wall of airtight isolating points position also; Earlier adjust the distance of two expanded rubbers covers between up and down according to the water intaking thickness requirement of place, monitoring point to be sealed monitor layer; With a pair of expanded rubber cover of adjusting place, position, monitoring point to be sealed in the Drilling well down, it meets behind water expansion naturally and airtight separating between the underground water with this monitoring point adjacent layer.
8.
multistage monitor well air lift pump sampling method according to claim 5; It is characterized in that: the water level of sampling monitoring layer is dark more; The distance that sampling monitoring is put water level is big more, and is big more by source of the gas and the pressurising pressure of air governor in air lift pump.
9.
multistage monitor well air lift pump sampling method according to claim 5; It is characterized in that: the distance that sampling monitoring is put water level is big more, and said source of the gas and the air governor ratio of pressurising time and pressure release time in air lift pump is big more.
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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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| CN107328903A (en) * | 2017-07-05 | 2017-11-07 | 河北工程大学 | Shallow Groundwater Pollution thing monitoring system |
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| CN108168645A (en) * | 2018-03-23 | 2018-06-15 | 中国矿业大学(北京) | Multi-section multi-layer is the same as survey casing and inspection well |
| CN110031262A (en) * | 2019-03-28 | 2019-07-19 | 中国地质调查局水文地质环境地质调查中心 | A kind of low disturbance layered sampling device of low discharge and its method of sampling |
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