CN113834698B - Shallow groundwater pollutant monitoring system - Google Patents
Shallow groundwater pollutant monitoring system Download PDFInfo
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- CN113834698B CN113834698B CN202111127970.4A CN202111127970A CN113834698B CN 113834698 B CN113834698 B CN 113834698B CN 202111127970 A CN202111127970 A CN 202111127970A CN 113834698 B CN113834698 B CN 113834698B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/10—Devices for withdrawing samples in the liquid or fluent state
- G01N1/14—Suction devices, e.g. pumps; Ejector devices
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
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Abstract
The invention discloses a shallow groundwater pollutant monitoring system, which comprises: the monitoring well is sequentially divided into a protective column, a middle column and a collecting column from top to bottom; the upper part and the lower part of the collecting column are respectively a cylinder and a cone, a plurality of groups of small holes used for groundwater infiltration are circumferentially arranged on the wall of the collecting column pipe positioned on the lower part of the cylinder, and a filter material replacing component is arranged on the inner wall of the collecting column below the small holes. The invention is suitable for monitoring the underground water quality observation index, particularly realizes in-situ monitoring, reduces the sampling difficulty under the condition of monitoring the underground water at different depths and shallow layers, and ensures that the sampling process is simple and rapid.
Description
Technical Field
The invention relates to the technical field of environmental science, underground water pollution and soil science research, in particular to a shallow underground water pollutant monitoring system.
Background
With the development of agricultural modernization, the use of a large amount of fertilizer and pesticide has become the most important factor of soil environmental pollution. Wherein pesticide residues have a severe impact on the water environment. Researches show that the dosage of the water-soluble pesticide accounts for more than 50 percent of the total dosage of the pesticide, and the water-soluble pesticide is mostly dissolved in water in a rice field after being applied to the rice field, so that water environment is easily polluted by surface runoff and soil leakage.
Shallow groundwater refers to the aquifer within 60 meters below the surface of the earth. Because the buried layer is shallow and is not filtered by deep rock, the water body is easily polluted by sewage discharged by factories and pesticide remained in farmlands. The drinking of polluted ground water seriously affects the health of people. Scholars at home and abroad carry out a great deal of theoretical and experimental researches on the action mechanisms of various physics, chemistry and biochemistry for converting agricultural chemicals such as pesticides in soil and obtain a lot of beneficial regular understanding.
In recent years, various pollutant migration models are established to simulate tendency and migration of agricultural chemicals such as pesticides and residues thereof in soil and underground water; however, such research is limited to indoor simulation or computer simulation, and cannot truly reflect actual complex and variable field situations, and a device capable of monitoring shallow groundwater pollutants is still lacking for analyzing and processing shallow groundwater; therefore, there is a need for a shallow groundwater contaminant monitoring device that can optimally address the above-mentioned problems for complex and varied field situations.
Disclosure of Invention
In order to solve the technical problem, the invention provides a shallow groundwater pollutant monitoring system.
The technical scheme of the invention is as follows: a shallow groundwater contaminant monitoring system comprising: the monitoring well is sequentially divided into a protective column, a middle column and a collecting column from top to bottom;
the upper part and the lower part of the collecting column are respectively a cylinder and a cone, a plurality of groups of small holes for groundwater infiltration are circumferentially arranged on the wall of the collecting column at the lower part of the cylinder, and a filter material replacing assembly is arranged on the inner wall of the collecting column below the small holes and is used for bearing and replacing filter materials for filtering soil particles and impurities;
the filter material replacing component comprises a filter material carrier plate, a control plate, a material lifting column and a material storage barrel,
the filter material support plate is fixedly connected with the inner wall of the collecting column, a plurality of groups of filter material holes for filter material falling are arranged on the filter material support plate at equal intervals in the circumferential direction, the control plate is of a fan blade type and is positioned on the lower bottom surface of the filter material support plate, each blade plate of the control plate corresponds to the filter material hole of the filter material support plate and is used for rotationally controlling the opening and closing of the filter material holes, a storage pocket for bearing the falling of the filter material is also arranged below the filter material support plate,
the material lifting column comprises a rotatable column shell and a screw rod, the screw rod is rotatably arranged in the column shell, shifting pieces which can slide up and down along a longitudinal sliding groove are correspondingly arranged on the inner wall of the column shell and at intervals of each spiral of the screw rod, magnetic sheets used for generating magnetic repulsion force by adjacent shifting pieces are arranged on the upper side and the lower side of each shifting piece, strip holes used for the shifting pieces to pass through are arranged on the screw rod and at positions corresponding to the positions of the shifting pieces,
the lower end of the material lifting column penetrates through the centers of the filter material carrier plate and the control plate and is rotationally connected with the inner bottom surface of the storage pocket through the lower end of the screw rod, the material lifting column is rotationally and hermetically connected with the filter material carrier plate and is connected with the control plate through a damping ring,
it stretches into the center tube that is equipped with in the storage vat and the combination driving motor output shaft that is equipped with through column shell upper end and hob upper end and storage vat top to rise material post upper end, the cover is equipped with and is used for bulldozing filter material exhaust annular piston plate on the center tube, bottom surface circumference is equipped with the multiunit bin outlet under the storage vat, just the bin outlet department all is equipped with and is used for preventing the automatic exhaust closure piece of filter material, it contacts the joint with the intermediate column inner wall to rise the material post.
Furthermore, the upper end of the cylinder of the collecting column is provided with a threaded opening in threaded connection with the middle column or the protecting column, the inner walls of the upper end and the lower end of the middle column are provided with threads in threaded connection with the protecting column and the collecting column, and the protecting column is a cylindrical cover body with a threaded opening. The detachable mode through protection post, intermediate column and collection post is assembled, can be according to the intermediate column of different degree of depth monitoring change different length to adopt threaded connection's mode, have the manufacturing process degree of difficulty little, advantages such as general strong and easy operation.
Furthermore, the filtering material support plates of two adjacent filtering material holes are provided with arc-shaped slope plates for improving the gathering of the filtering material in each filtering material hole. Through setting up each arc ramp, can improve dredging the effect to the filter material when carrying out the blanking of filter material hole to reduce the filter material after having used and remain the quantity at the filter material support plate.
Further, the sampling subassembly includes outlet pipe, sampling bottle and mechanical pump, the outlet pipe stretches into the cone bottom in the collection post, and each junction of sampling subassembly all seals the leak protection with thread seal area and waterproof glue. Can carry out the sampling operation of shallow groundwater through sampling component effectual cooperation monitoring well to improve the work efficiency to shallow groundwater pollutant monitoring.
Further, the middle column is made of stainless steel materials, and the blocking piece is a hexapetalous rubber piece which can be turned outwards. The design of the blocking piece is adopted, the situation that unused filter materials in the storage vat can not be discharged from the discharge hole under the self gravity can be avoided, meanwhile, the middle column is made of stainless steel materials, the monitoring work of shallow groundwater can be met, and the material cost is moderate.
Furthermore, the combined driving motor comprises a first driving motor and a second driving motor, the first driving motor is used for being connected with the column shell, the second driving motor is used for being connected with the screw rod, and the first driving motor is detachably clamped with a lug at the upper end of the column shell through the matched chuck. Through the setting of the first driving motor and the second driving motor of the combined driving motor, the first driving motor and the second driving motor are driven in a mutually reverse direction to drive the column shell and the screw rod to rotate mutually, so that the conveying efficiency of vertical lifting is improved.
Further, the storage vat lateral wall circumference is equipped with the multiunit and is used for the arc fixed with the contact of intermediate pillar inner wall, the arc passes through the motor push rod and is connected with the storage vat lateral wall, and arc and intermediate pillar inner wall contact one side are equipped with the rubber pad. Through the electric putter driven arc that the storage vat circumference set, can be convenient for control it and take the dismouting operation to can set a distance sensor who is used for monitoring annular piston plate displacement, and carry out the colour pilot lamp that sets up on the protection post through transmission such as bluetooth signal and carry out the state observation of annular piston plate, so that in time carry out the change etc. of storage vat.
Furthermore, each blade of control panel, storage pocket are network structure, and its mesh bore is less than the filter material particle diameter. The filter material is a mixture of commercially available sand and vermiculite with the grain diameter of 0.2-0.5 cm in any ratio.
Furthermore, the front end of each blade plate of the control plate is provided with an arc-shaped clamping head used for being connected with a clamping block, the clamping block is connected with an arc-shaped groove matched with the lower bottom surface of the filter material support plate in a sliding mode, and the clamping block is connected with a spring matched with the arc-shaped groove. Through the arrangement of structures such as the arc-shaped clamping head and the arc-shaped groove, the situation that the control panel excessively rotates when being switched under the rotating state can be avoided, and therefore effective operation of all functions of the monitoring well is guaranteed.
The invention has the beneficial effects that:
(1) the shallow groundwater pollutant monitoring system is particularly suitable for monitoring groundwater quality observation indexes such as pH, dissolved oxygen, oxidation-reduction potential, COD, ammonia nitrogen, total phosphorus and the influence of organic pollutants on groundwater after agricultural application, particularly realizes in-situ monitoring, reduces the sampling difficulty under the condition of monitoring the shallow groundwater with different depths, and enables the sampling process to be simple and rapid.
(2) According to the shallow groundwater pollutant monitoring system, the protective column, the middle column and the collecting column are detachably designed in three sections, so that the middle columns with different specifications can be replaced, and sampling monitoring work of shallow groundwater pollutants under different insertion depths can be accurately controlled.
(3) According to the shallow groundwater pollutant monitoring system, the related structural design of the filter material replacing component is adopted, the time of monitoring during insertion of the monitoring well can be prolonged, efficient collection operation can be kept for a long time, and the problem that the underground water collection efficiency is affected due to blockage of the monitoring well by impurities such as soil after long-time insertion is effectively avoided.
Drawings
Fig. 1 is a schematic overall appearance of the monitoring well of the present invention.
Fig. 2 is a schematic, broken-away view of a monitoring well of the present invention.
FIG. 3 is a schematic partial cross-sectional view of a collection column of the present invention.
Fig. 4 is an external view of the storage vat of the present invention.
FIG. 5 is a schematic partial cross-sectional view of the storage vat of the present invention.
FIG. 6 is a schematic view of the structure of the combined driving motor of the storage vat of the present invention.
Figure 7 is a schematic view in partial cross-section of a lifter bar according to the invention.
Fig. 8 is a schematic partial cross-sectional view of the column housing of the lifter column of the present invention.
Fig. 9 is a schematic diagram of the structure of the shifting sheet of the lifting column of the invention.
Fig. 10 is a schematic structural diagram of a filter material carrier plate according to a first state of the present invention.
Fig. 11 is a structural diagram of the filter material carrier plate in a second state according to the present invention.
Fig. 12 is a schematic structural diagram of a filter material carrier plate in a third state according to the present invention.
Wherein, 1-protective column, 2-middle column, 3-collecting column, 31-cylinder, 32-cone, 33-small hole, 4-filtering material carrier plate, 41-filtering material hole, 42-arc slope plate, 43-fixture block, 44-arc groove, 45-spring, 5-control plate, 51-blade plate, 52-arc chuck, 6-material lifting column, 61-column shell, 611-longitudinal chute, 612-shifting sheet, 613-lug, 62-screw rod, 621-strip hole, 7-storage barrel, 71-central tube, 72-combined driving motor, 721-first driving motor, 722-second driving motor, 723-chuck, 73-annular piston plate, 74-discharge port, 75-block sheet, 76-arc plate, 77-motor push rod, 8-storage pocket and 9-water outlet pipe.
Detailed Description
The present invention will be described in further detail with reference to specific embodiments thereof for better understanding the advantages of the invention.
Examples
As shown in fig. 1 and 2, a shallow groundwater contamination monitoring system includes: the monitoring well is divided into a protective column 1, a middle column 2 and a collecting column 3 from top to bottom in sequence; the upper end of a cylinder 31 of the collecting column 3 is provided with a threaded opening in threaded connection with the middle column 2 or the protective column 1, the middle column 2 is made of stainless steel materials, the monitoring work of shallow groundwater can be met, the material cost is moderate, threads for threaded connection with the protective column 1 and the collecting column 3 are arranged on the inner walls of the upper end and the lower end of the middle column 2, the protective column 1 is a cylindrical cover body with the threaded opening, the protective column 1, the middle column 2 and the collecting column 3 are assembled in a detachable mode, the middle columns 2 with different lengths can be monitored and replaced according to different depths, and the threaded connection mode is adopted, so that the multifunctional underground water collecting column has the advantages of small manufacturing process difficulty, strong universality, easiness in operation and the like;
as shown in fig. 3, the upper and lower parts of the collecting column 3 are respectively a cylinder 31 and a cone 32, the pipe wall of the collecting column 3 at the lower part of the cylinder 31 is circumferentially provided with a plurality of groups of small holes 33 for groundwater infiltration, and the inner wall of the collecting column 3 below the small holes 33 is provided with a filter material replacing component for bearing and replacing filter materials for filtering soil particles and impurities;
as shown in fig. 3, the filter material replacing component comprises a filter material carrier plate 4, a control plate 5, a material lifting column 6 and a material storage barrel 7,
as shown in fig. 3 and 10-12, the filter material carrier plate 4 is fixedly connected with the inner wall of the collection column 3, and 6 sets of filter material holes 41 for the falling of the filter material are circumferentially and equidistantly arranged on the filter material carrier plate 4, the control panel 5 is in a fan-blade shape and is positioned on the lower bottom surface of the filter material carrier plate 4, each blade 51 of the control panel 5 corresponds to the filter material hole 41 of the filter material carrier plate 4 in position and is used for rotationally controlling the opening and closing of the filter material hole 41, each blade 51 of the control panel 5 and the storage pocket 8 are of a net structure, the aperture of the net is smaller than the particle size of the filter material, and the filter material selects sand and vermiculite mass ratio 1: 2, a storage pocket 8 for bearing the falling of the filter material is also arranged below the filter material carrier plates 4, the filter material carrier plates 4 of two adjacent filter material holes 41 are provided with arc-shaped slope plates 42 for improving the collection of the filter material in each filter material hole 41, by arranging the arc-shaped slope plates 42, the dredging function of the filter material can be improved when the filter material holes 41 are used for blanking, thereby reducing the residual quantity of the used filter material on the filter material carrier plate 4, the front end of each blade 51 of the control plate 5 is provided with an arc-shaped chuck 52 for connecting with the fixture block 43, the fixture block 43 is slidably connected with the arc-shaped groove 44 arranged on the lower bottom surface of the filter material carrier plate 4, the clamping block 43 is connected with a spring 45 arranged in the arc-shaped groove 44 and is arranged by structures such as the arc-shaped clamping head 52, the arc-shaped groove 44 and the like, the situations of excessive rotation and the like when the control panel 5 is switched in a rotation state can be avoided, so that the effective operation of each function of the monitoring well is ensured;
as shown in fig. 7-9, the material lifting column 6 includes a rotatable column housing 61 and a screw rod 62, the screw rod 62 is rotatably disposed in the column housing 61, and the inner wall of the column housing 61 and each spiral interval of the screw rod 62 are respectively and correspondingly provided with a shifting plate 612 capable of sliding up and down along the column housing 61 and provided with a longitudinal sliding slot 611, the upper and lower sides of the shifting plate 612 are respectively provided with a magnetic sheet for generating magnetic repulsion force by the adjacent shifting plate 612, the screw rod 62 is provided with a bar hole 621 for passing the shifting plate 612 at a position corresponding to each shifting plate 612, the lower end of the material lifting column 6 penetrates through the centers of the filter material carrier plate 4 and the control plate 5 and is rotatably connected with the inner bottom surface of the material storage pocket 8 through the lower end of the screw rod 62, the material lifting column 6 is rotatably and hermetically connected with the filter material carrier plate 4, the material lifting column 6 is connected with the control plate 5 through a damping ring, the damping ring is a commercially available damping ring or is subjected to shape adjustment, etc., which is a lantern ring with frictional resistance, to ensure that the column housing 61 can rotate along with the column housing 61 at the initial rotation stage of the column housing 61 to realize the rotation switching of the control panel 5, and when the rotation reaches the limit, the rotation can be stopped without affecting the rotation of the column housing 61,
as shown in fig. 4-6, the upper end of the lifting column 6 extends into the central tube 71 provided in the storage vat 7 and is connected with the output shaft of the combined driving motor 72 provided at the top of the storage vat 7 through the upper end of the column casing 61 and the upper end of the screw rod 62, the combined driving motor 72 comprises a first driving motor 721 connected with the column casing 61 and a second driving motor 722 connected with the screw rod 62, the first driving motor 721 is detachably clamped with the upper end tab 613 of the column casing 61 through an associated chuck 723, the first driving motor 721 and the second driving motor 722 of the combined driving motor 72 are arranged and driven by the first driving motor 721 and the second driving motor 722 in opposite directions to each other to drive the column casing 61 and the screw rod 62 to rotate with each other, so as to improve the conveying efficiency of vertical lifting,
as shown in fig. 5, an annular piston plate 73 for pushing and pressing the filter material to discharge is sleeved on the central tube 71, 4 groups of discharge openings 74 are circumferentially arranged on the lower bottom surface of the storage vat 7, and the discharge openings 74 are provided with blocking sheets 75 for preventing the filter material from automatically discharging, the blocking sheets 75 are six-flap type rubber sheets capable of being opened outwards, so that the unused filter material in the storage vat 7 can be prevented from being discharged from the discharge openings 74 under the self-gravity; the material lifting column 6 is in contact clamping connection with the inner wall of the middle column 2, a plurality of groups of arc-shaped plates 76 which are used for being in contact with and fixed to the inner wall of the middle column 2 are arranged on the outer side wall of the storage barrel 7 in the circumferential direction, the arc-shaped plates 76 are connected with the outer side wall of the storage barrel 7 through motor push rods 77, rubber pads are arranged on one sides, in contact with the inner wall of the middle column 2, of the arc-shaped plates 76, the arc-shaped plates 76 are driven by the electric push rods 77 arranged on the circumference of the storage barrel 7, the electric push rods 77 are commercially available electric push rods or are subjected to shape adjustment to be installed in the device in a matching mode, the taking, dismounting and mounting operations can be conveniently controlled, a distance sensor used for monitoring the displacement of the annular piston plate 73 can be arranged, the state observation of the annular piston plate 73 is carried out through color indicator lamps arranged on the protective column 1 through transmission of Bluetooth signals and the like, and the replacement of the storage barrel 7 can be carried out in time;
as shown in fig. 3, the sampling subassembly includes outlet pipe 9, sampling bottle and mechanical pump, and outlet pipe 9 stretches into the bottom in the cone 32 of collecting post 3, and each junction of sampling subassembly all seals the leak protection with unsintered tape and waterproof glue, can carry out the sample operation of shallow groundwater through the effectual cooperation monitoring well of sampling subassembly to improve the work efficiency to shallow groundwater pollutant monitoring.
The working method of the shallow groundwater pollutant monitoring system comprises the following steps:
a Huazhong PU-LQ30-IN300D distance sensor module is additionally arranged on the bottom surface of the annular piston plate 73 and the inner bottom surface of the storage barrel 7, and is provided with an American micro-core PIC18F66K22-I/PT singlechip and a commercially available Bluetooth module; the filter material is in signal butt joint with a commercially available indicator light and a commercially available Bluetooth module arranged on the protective column 1, green indication is used as the unused filter material state, and red indication is used as the used filter material state;
selecting a middle column 2 with a corresponding length specification, filling unused filter materials in a storage bucket 7 when the state of the filter materials on a filter material carrier plate 4 exceeds the height of the pore at the uppermost end, performing thread butt joint on a protection column 1, the middle column 2 and a collection column 3, and then completing assembly of the monitoring well;
vertically inserting the monitoring well into a soil area to be monitored, so that shallow groundwater slowly flows into the monitoring well in a natural state, circulation of the groundwater is simulated really, and soil around the monitoring well is not disturbed; meanwhile, impurities such as soil particles, plant debris and the like are blocked under the action of the filter material, soil particles and fine plant debris penetrating into underground water can be effectively removed, interference is reduced, and a water outlet pipe is convenient for sucking a sample;
when the combined driving motor 72 is started according to the preset time, the first driving motor 721 drives the column housing 61 to rotate 30 ° at the low speed, so that it is switched from the first state to the second state, i.e. the open state of the control panel 5, from fig. 10 to fig. 11, the used filter material on the filter material carrier plate 4 is dropped into the storage pocket 8 through the filter material hole 41,
the first driving motor 721 is started again after 5 seconds of pause, the control panel 5 is switched from the second state to the third state by continuous rotation, that is, the closed state of the control panel 5, from fig. 11 to fig. 12, and simultaneously the second driving motor 722 is started, then under the relative rotation of the column housing 61 and the screw rod 62, each poking piece 612 cooperating with the column housing 61 pokes the used filter material into the screw rod 62, and the poking pieces 612 rotate upward along with the screw rod 62 and assist in poking the used filter material to move upward, when the poking pieces 612 rotate and move to the bar holes 621 of the upper screw rod 62, it slides one poking piece 612 downward along the column housing 61, the magnetic repulsion between the two adjacent poking pieces 612 controls the distance between the two pieces, thereby ensuring that the used filter material respectively located at each screw interval of the screw rod 62 is conveyed to the annular piston plate 73 of the storage barrel 7 by falling to the storage pocket 8, the annular piston plate 73 is pushed downwards under the gravity of the used filter material mixed with the underground water and various magazines to exceed the blocking limit of the blocking piece 75, so that the unused filter material is discharged onto the filter material carrier plate 4 through each discharge port 74 to complete the replacement of the filter material,
when a sample is collected, the protective column 1 can be unscrewed, underground water is pumped out for sampling through a commercially available mechanical pump and a water outlet pipe 9, and a sampling bottle is a brown glass container and is provided with a water inlet for collecting the underground water from a monitoring well;
meanwhile, when the color indicator light indicates red, the protective column 1 can be opened, the arc-shaped plate 76 is driven to shrink by the aid of a starting motor push rod 77 such as a commercially available controller, the storage bucket 7 is clamped out to replace filter materials during the shrinkage, and then the storage bucket 7 is placed into the original position according to the steps to complete replacement of the storage bucket 7.
Application example
During the experiment, researchers can carry out the experiment according to the following specific operation steps:
1) selecting a field test land with a total floor area of about 1800m2The system is divided into 9 simulation cells, and the floor area of each cell is 100m2Each simulation community is provided with 5 monitoring wells;
2) monitoring wells with different heights are combined according to the selection of the monitoring depth of shallow groundwater, and the height is generally 0.1m, 0.5m, 1m, 1.5m and 2 m;
3) the monitoring well is composed of three parts, namely a collecting column 3, a middle column 2 and a protective column 1, wherein the middle column is 20.5 m in one section and can be combined in several sections, firstly, the collecting column 3 is taken out, a water outlet pipe 9 penetrates through a filter material replacing component and extends into the middle of a cone 32 of the collecting column 3, the pipe head of the water outlet pipe 9 extends to about 1/3 of the bottom of the cone 32, the middle column 2 is respectively 0, 1, 2, 3 and 4 sections to be combined and connected according to the depth of the monitoring well in the monitoring system, the middle column 2 is screwed with the collecting column 3 after connection is completed, then, the water outlet pipe 9 is pulled to the upper end of the middle column 2 and is fixed on the inner wall of the middle column 2, the length of the water outlet pipe 9 can extend out of about 1m of the middle column 2, a sampling bottle is connected when samples are conveniently collected at the later stage, and finally, the upper opening of the middle column 2 or the upper opening of the collecting column 3 is connected with the protective column to form the complete monitoring well with different depths;
4) all joints of the shallow groundwater pollution detection system are sealed and fixed by raw material belts or waterproof glue;
5) the 5 installed monitoring wells are drilled into a test ground until the protective column 1 is located at about 30cm above the ground, so that working obstacles of operators can be avoided, sampling can be facilitated, the protective column 1 is unscrewed, the water outlet pipe 9 is drawn out, a suction ball is adopted for siphoning, and the water outlet pipe 9 is directly connected into a prepared sampling bottle after liquid discharge;
6) the sample collection can be carried out at different time periods according to the test requirements, and can also be carried out on shallow groundwater samples at different depths, and when the samples are sampled at different time periods, the protective column 1 needs to be screwed up again after the samples are collected, so that rainwater and sundries are prevented from entering;
7) and the sampling bottle after the sample is collected is put into a vehicle-mounted refrigerator to be stored in time.
Claims (10)
1. A shallow groundwater contaminant monitoring system, comprising: the monitoring well comprises a monitoring well and a sampling assembly, wherein the monitoring well is sequentially divided into a protective column (1), a middle column (2) and a collecting column (3) from top to bottom;
the upper part and the lower part of the collecting column (3) are respectively a cylinder (31) and a cone (32), the pipe wall of the collecting column (3) positioned at the lower part of the cylinder (31) is circumferentially provided with a plurality of groups of small holes (33) for groundwater infiltration, the inner wall of the collecting column (3) positioned below the small holes (33) is provided with a filter material replacing component, and the filter material replacing component is used for bearing and replacing filter materials for filtering soil particles and impurities;
the filter material replacing component comprises a filter material carrier plate (4), a control panel (5), a material lifting column (6) and a storage barrel (7),
the filter material carrier plate (4) is fixedly connected with the inner wall of the collecting column (3), a plurality of groups of filter material holes (41) used for filter material falling are circumferentially arranged on the filter material carrier plate (4) at equal intervals, the control panel (5) is in a fan blade shape and is positioned on the lower bottom surface of the filter material carrier plate (4), each blade plate (51) of the control panel (5) corresponds to the position of the filter material hole (41) of the filter material carrier plate (4) and is used for rotationally controlling the opening and closing of the filter material hole (41), a storage pocket (8) used for bearing the filter material falling is also arranged below the filter material carrier plate (4),
the material lifting column (6) comprises a rotatable column shell (61) and a screw rod (62), the screw rod (62) is rotatably arranged in the column shell (61), shifting pieces (612) which can slide up and down along a longitudinal sliding groove (611) are arranged at the positions of the inner wall of the column shell (61) and each spiral interval of the screw rod (62) correspondingly, magnetic sheets used for generating magnetic repulsion force by adjacent shifting pieces (612) are arranged on the upper side and the lower side of each shifting piece (612), strip holes (621) used for the shifting pieces (612) to pass through are arranged at the positions of the screw rod (62) corresponding to the positions of the shifting pieces (612),
the lower end of the material lifting column (6) penetrates through the centers of the filter material carrier plate (4) and the control plate (5) and is rotationally connected with the inner bottom surface of the storage pocket (8) through the lower end of a screw rod (62), the material lifting column (6) is rotationally and hermetically connected with the filter material carrier plate (4), the material lifting column (6) is connected with the control plate (5) through a damping ring,
it stretches into center tube (71) that is equipped with in storage vat (7) and through combination driving motor (72) output shaft that column casing (61) upper end and hob (62) upper end and storage vat (7) top were equipped with to rise material post (6) upper end, the cover is equipped with on center tube (71) and is used for bulldozing filter material exhaust annular piston plate (73), bottom surface circumference is equipped with multiunit bin outlet (74) under storage vat (7), just bin outlet (74) department all is equipped with and is used for preventing automatic exhaust closure plate (75) of filter material, it contacts the joint with intermediate column (2) inner wall to rise material post (6).
2. A shallow groundwater pollutant monitoring system according to claim 1, wherein a threaded opening in threaded connection with the middle column (2) or the guard column (1) is formed in the upper end of the cylinder (31) of the collecting column (3), threads for threaded connection with the guard column (1) and the collecting column (3) are formed in the inner walls of the upper end and the lower end of the middle column (2), and the guard column (1) is a cylindrical cover body with a threaded opening.
3. A shallow groundwater pollutant monitoring system according to claim 1, wherein the filter material carrier plates (4) of two adjacent filter material holes (41) are provided with arc-shaped slope plates (42) for increasing the collection of filter material in each filter material hole (41).
4. A shallow groundwater pollutant monitoring system according to claim 1, wherein the sampling assembly comprises a water outlet pipe (9), a sampling bottle and a mechanical pump, the water outlet pipe (9) extends into the bottom of the cone (32) of the collecting column (3), and joints of the sampling assembly are sealed and leak-proof by a raw material belt and a waterproof glue.
5. A shallow groundwater contaminant monitoring system according to claim 1, wherein the middle column (2) is made of stainless steel material, and the blocking piece (75) is a hexapetalous rubber piece which can be turned over outwards.
6. A shallow groundwater contaminant monitoring system according to claim 1, wherein the combined drive motor (72) comprises a first drive motor (721) for connection with the column housing (61) and a second drive motor (722) for connection with the screw rod (62), the first drive motor (721) being detachably snap-fitted with the upper end tab (613) of the column housing (61) by means of an associated chuck (723).
7. The shallow groundwater pollutant monitoring system according to claim 1, wherein a plurality of groups of arc-shaped plates (76) which are used for being fixed in contact with the inner wall of the middle column (2) are circumferentially arranged on the outer side wall of the storage barrel (7), the arc-shaped plates (76) are connected with the outer side wall of the storage barrel (7) through motor push rods (77), and rubber pads are arranged on one sides of the arc-shaped plates (76) in contact with the inner wall of the middle column (2).
8. A shallow groundwater contamination monitoring system according to claim 1, wherein each of the blades (51) and the storage pockets (8) of the control panel (5) is of a mesh structure.
9. A shallow groundwater contaminant monitoring system according to claim 1, wherein the blocking piece (75) is a six-petal type rubber piece that can be flipped open to the outside to open the discharge port (74).
10. A shallow groundwater contaminant monitoring system according to claim 1, wherein the front end of each blade (51) of the control plate (5) is provided with an arc-shaped chuck (52) for connecting with a fixture block (43), the fixture block (43) is slidably connected with an arc-shaped groove (44) arranged on the lower bottom surface of the filter material carrier plate (4), and the fixture block (43) is connected with a spring (45) arranged in the arc-shaped groove (44).
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| CN202111127970.4A CN113834698B (en) | 2021-09-26 | 2021-09-26 | Shallow groundwater pollutant monitoring system |
| JP2022181465A JP7351046B2 (en) | 2021-09-26 | 2022-11-12 | Shallow groundwater contaminant monitoring system |
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| CN113834698A (en) | 2021-12-24 |
| JP7351046B2 (en) | 2023-09-27 |
| JP2023067870A (en) | 2023-05-16 |
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