CN111649990A - Underground water sampling device and sampling detection method thereof - Google Patents
Underground water sampling device and sampling detection method thereof Download PDFInfo
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- CN111649990A CN111649990A CN202010659968.0A CN202010659968A CN111649990A CN 111649990 A CN111649990 A CN 111649990A CN 202010659968 A CN202010659968 A CN 202010659968A CN 111649990 A CN111649990 A CN 111649990A
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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
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Abstract
The invention discloses an underground water sampling device, wherein an underground water accommodating part is a pipe body with a sealed top and an open bottom; the underground water sampling control part is a valve body arranged at the bottom of the pipe body, a bottom inlet and a top outlet of the valve body are communicated through a valve cavity, a valve core with a spherical bottom is arranged in the valve cavity, the top of the valve core is connected with a supporting piece arranged in the valve cavity through an elastic piece, and the bottom surface of the valve core is matched with a spherical structure at the inlet end of the valve cavity; the underground water inlet part is a water inlet net which is arranged at the bottom of the valve body and has a cylindrical structure; the counterweight part is a counterweight block arranged at the bottom of the water inlet net; the impurity sampling part is a water permeable cylinder arranged on the top surface of the pipe body, and a filter screen for attaching impurities is sleeved outside the water permeable cylinder; the hanging part is a perforated connecting piece arranged at the top of the permeable cylinder. The invention also discloses a sampling detection method using the device, which can conveniently sample at a fixed water depth, thereby ensuring the accuracy of a detection result.
Description
Technical Field
The invention relates to the technical field of underground water quality detection equipment, in particular to an underground water sampling device and an underground water sampling detection method.
Background
Groundwater refers to water present in the interstices of rocks below ground level and in the narrower sense to water in saturated aquifers below the surface of the groundwater. The groundwater is an important component of water resources, and is one of important water sources for agricultural irrigation, industrial and mining and cities due to stable water yield and good water quality. However, under certain conditions, changes in groundwater can also cause adverse natural phenomena such as swampiness, salinization, landslide, and ground subsidence. Therefore, in geological exploration, groundwater sampling and detection work is required. However, the existing groundwater sampler has a complex structure and is easy to damage, and most importantly, the existing groundwater sampler cannot sample groundwater with a fixed depth in a well, so that the accuracy of a detection result is affected.
Disclosure of Invention
In order to solve the above problems, the present invention provides an underground water sampling device, and simultaneously provides an underground water sampling detection method, which can specifically adopt the following technical scheme:
the groundwater sampling device comprises
The underground water accommodating part is a pipe body with a sealed top and an open bottom;
the underground water sampling control part is a valve body arranged at the bottom of the pipe body, a bottom inlet and a top outlet of the valve body are communicated through a valve cavity, a valve core with a spherical bottom is arranged in the valve cavity, the top of the valve core is connected with a supporting piece arranged in the valve cavity through an elastic piece, and the bottom surface of the valve core is matched with a spherical structure at the inlet end of the valve cavity;
the underground water inlet part is a water inlet net which is arranged at the bottom of the valve body and has a cylindrical structure;
the counterweight part is a counterweight block arranged at the bottom of the water inlet net;
the impurity sampling part is a water permeable cylinder arranged on the top surface of the pipe body, and a filter screen for attaching impurities is sleeved outside the water permeable cylinder;
the hanging part is a perforated connecting piece which is arranged at the top of the permeable cylinder and is used for connecting the lifting mechanism.
The valve body is connected with the pipe body in a threaded manner.
The water permeable cylinder is connected with the connecting piece with the hole in a threaded manner.
The supporting piece is a ring-shaped piece horizontally arranged in the valve cavity.
The elastic parts are at least two and are uniformly distributed on the top surface of the valve core.
The lifting mechanism comprises a winder arranged on the support frame, and a steel cable on the winder is connected with the connecting piece with the hole.
The bottom support of the support frame is arranged on the telescopic wellhead support seat.
The telescopic wellhead support seat comprises a connecting seat, two ends of the connecting seat are respectively provided with a sliding support arm, and the sliding support arms are fixed through locking bolts positioned on the side surfaces of the connecting seat; the middle part of the connecting seat is also provided with a through hole for the steel cable to pass through.
The connecting base is internally provided with an inserting groove for accommodating the sliding supporting arm, and the end part of the sliding supporting arm is provided with a limiting block.
The groundwater sampling detection method of the invention uses the groundwater sampling device, which comprises the following steps:
firstly, transversely placing a winder on a wellhead through a support frame or a telescopic wellhead support seat;
secondly, connecting and fixing a perforated connecting piece of the sampling device with a steel cable on a winder;
thirdly, putting the sampling device into the well to a certain depth through a winder, vertically standing for 30 seconds for sampling, and then pulling out the sampling device;
fourthly, inverting the sampling device, screwing the valve body to separate the sampling device from the pipe body, and then pouring out the groundwater sample in the pipe body;
fifthly, detecting the water quality of the underground water sample by using a water quality detector;
and sixthly, recording data.
The underground water sampling device provided by the invention has a simple structure, and the bottom of the pipe body is provided with the valve body which can control the opening and closing of the valve core according to the water depth.
Compared with the prior art, the invention has the following beneficial effects:
1. the sampling device is placed in the center of a well mouth through the support frame or the telescopic well mouth support seat, compared with the traditional sampling device in which the steel cable winding roller is placed beside the well mouth, the steel cable of the sampling device is in a vertical state when being placed and wound, and cannot be rubbed with the edge of the well mouth, and the sampling device cannot be attached to a well wall when being placed and pulled back, so that the sampling device cannot be abraded, and meanwhile, the phenomenon that the sampling device falls into the well due to the fact that the steel cable is broken due to friction with the edge of the well mouth or the sampling device falls off from the steel cable due to friction with the well wall is prevented.
2. According to the telescopic wellhead support seat, the insertion grooves are formed in the two ends of the connecting seat, the sliding support arms are movably inserted and installed on the connecting seat through the insertion grooves, the threaded holes are formed in the side face of the connecting seat and are communicated with the insertion grooves, the locking bolts are movably installed on the side face of the connecting seat through the threaded holes, one ends of the locking bolts extend into the insertion grooves, when the length of the bottom support of the support frame is smaller than the diameter of a wellhead, the telescopic wellhead support seat is installed below the bottom support of the support frame, the sliding support arms are pulled out of the connecting seat, the extending lengths of the sliding support arms at the two ends of the connecting seat are adjusted, and after the locking bolts are well adjusted, the telescopic wellhead support seat is fixed by screwing, so that the sampling device can.
3. The accommodating part and the sampling control part of the sampling device are both made of polytetrafluoroethylene materials, the sampling device is more durable according to the corrosion resistance of the polytetrafluoroethylene materials, meanwhile, the density of the polytetrafluoroethylene materials is greater than that of water, the lower end of the water inlet net is fixedly provided with the balancing weight, the sampling device can sink in the water, and the filter screen is sleeved outside the water permeable cylinder on the top surface of the pipe body, so that when the sampling mechanism is taken out of the well, impurities in the water can be attached to the filter screen, sampling observation is convenient, and meanwhile, the water in the well can be taken out through the sampling pipe body for water quality detection.
4. The underground water sampling control part of the invention automatically samples in the process of putting the sampling device into a well by arranging the spherical valve core connected with the elastic element in the valve body and arranging the lower end of the inner part of the valve body into a spherical structure matched with the valve core, in particular, when the depth of the well in which the sampling device is arranged is not enough, the water pressure does not reach the force for opening the valve core, well water can not enter the sampling tube body, when the sampling device is put into the well for a certain depth, the water pressure reaches the force for opening the valve core because of the deep enough depth, the valve core moves upwards from the inlet at the bottom of the valve body, the inlet of the valve body is opened, water enters the sampling tube body, when the sampling device is pulled back, the water pressure is reduced, the elastic element resets, the valve core moves downwards, the inlet of the valve body is blocked again, water can not enter the sampling tube body again, and underground water with fixed depth can be conveniently sampled, the accuracy of the water quality detection result is convenient to improve.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a schematic view of the structure of the tubular body portion of fig. 1.
FIG. 3 is a schematic view showing the structure of the groundwater sampling control part in FIG. 1.
Fig. 4 is a schematic diagram of the upward movement state of the spool of fig. 3.
Fig. 5 is a schematic view of the construction of a lifting mechanism connected to the present invention.
Detailed Description
The following describes embodiments of the present invention in detail with reference to the drawings, which are implemented on the premise of the technical solution of the present invention, and detailed embodiments and specific implementation procedures are provided, but the scope of the present invention is not limited to the following embodiments.
As shown in fig. 1 to 5, the groundwater sampling apparatus according to the present invention includes a groundwater containing part, a groundwater sampling control part, a groundwater inlet part, a counterweight part, an impurity sampling part, and a suspending part. Specifically, the groundwater holding part is made of polytetrafluoroethylene materials and is provided with a top sealing pipe body 1 with an opening at the bottom, the groundwater sampling control part 2 is a polytetrafluoroethylene valve body 2.1 screwed at the bottom of the pipe body 1, a bottom inlet and a top outlet of the valve body 2.1 are communicated through a valve cavity 2.2, the outer sides of the bottom inlet and the top outlet are respectively provided with a connecting thread, a support part 2.3 positioned at the middle lower part is integrally arranged in the valve cavity 2.2, the support part 2.3 is an annular structure body horizontally arranged in the valve cavity 2.2 or a plurality of horizontal connecting pieces symmetrically distributed in the valve cavity 2.2, the lower surface of the support part 2.3 is connected with a valve core 2.5 of the polytetrafluoroethylene valve body through uniformly distributed elastic pieces 2.4 (mostly adopting springs), the bottom surface of the valve core 2.5 is spherical, and is matched with a spherical structure of an inlet end of the valve. When the elastic element 2.4 contracts, the valve core 2.5 moves upwards, and the inlet at the bottom is opened; when the elastic element 2.4 is stretched, the valve core 2.5 descends and the bottom inlet is closed. The stretching and shrinking of the elastic element 2.4 depend on the water pressure at the inlet of the bottom of the valve body 2.1, and the elastic element 2.4 can be forced to shrink by the water pressure only when the pipe body 1 descends to a certain depth below the water surface; on the contrary, in the process that the pipe body 1 is just immersed in water or pulled out of the water surface after sampling, the elastic member 2.4 is kept (or gradually restored) in the original state due to insufficient water pressure, so that the sampled water can be surely taken at a fixed depth below the water surface by the action of the groundwater sampling control part 2. The inlet connected with the bottom of the valve body 2.1 is an underground water inlet part which is a cylindrical water inlet net 3 connected with the valve body 2.1 through a screwed piece. The bottom of the water inlet net 3 is also provided with a balancing weight 4 as a balancing weight part for enabling the pipe body 1 to keep a vertical state for taking water. In order to observe and analyze the solid-state impurity composition in the water, the water purifier is further provided with an impurity sampling part 5 which is a water permeable cylinder 5.1 integrally arranged on the top surface of the pipe body 1, a filter screen 5.2 used for impurity attachment is sleeved outside the water permeable cylinder 5.1, and the top of the water permeable cylinder 5.1 is provided with a thread used for connecting a perforated connecting piece 6. The above-mentioned perforated connecting piece 6 is used for connecting a lifting mechanism, which constitutes a suspension.
The lifting mechanism comprises a winder 7.2 arranged on a support frame 7.1, and a steel cable 7.3 on the winder 7.2 is connected with a connecting piece 6 with a hole. During the use, violently put the bottom sprag of support frame 7.1 on the well head, make sample body 1 can sink into the surface of water at well head central authorities, avoid with the wall of a well contact, reduce sample body 1 and overturn and cable wire 7.3 friction fracture's probability. If the bottom brace length of the support bracket 7.1 is shorter than the inlet diameter, it is mounted on a telescoping wellhead brace. Above-mentioned telescopic well head props seat includes connecting seat 8.1, and an inserting groove has been seted up respectively at the both ends of connecting seat 8.1, and slidable mounting has a sliding support arm 8.2 in every inserting groove, and sliding support arm 8.2 is fixed through the locking bolt 8.3 that is located the connecting seat 8.1 side, and sliding support arm 8.2's tip is provided with stopper 8.4. In order to facilitate the vertical falling of the steel cable 7.3, a through hole 8.5 for penetrating the steel cable 7.3 is further formed in the middle of the connecting seat 8.1.
By using the sampling device, the stability of groundwater sampling can be optimized.
Specifically, the groundwater sampling detection method provided by the invention comprises the following steps:
firstly, transversely placing a winder 7.2 on a wellhead through a support frame 7.1 or a telescopic wellhead support seat 8.1;
secondly, connecting and fixing a perforated connecting piece 6 of the sampling device with a steel cable 7.3 on a winder 7.2;
thirdly, the sampling device is put into the well to a certain depth through a winder 7.2, vertically stands for 30 seconds for sampling, and then the sampling device is pulled out;
fourthly, inverting the sampling device, screwing the valve body 2.1 to separate the sampling device from the pipe body 1, and pouring out the underground water sample in the pipe body 1;
fifthly, detecting the water quality of the underground water sample by using a water quality detector;
and sixthly, recording data.
In the description of the present invention, it should be noted that the terms "top", "bottom", "inside", "outside", "vertical", "horizontal", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
Claims (10)
1. The utility model provides an underground water sampling device which characterized in that: comprises that
The underground water accommodating part is a pipe body with a sealed top and an open bottom;
the underground water sampling control part is a valve body arranged at the bottom of the pipe body, a bottom inlet and a top outlet of the valve body are communicated through a valve cavity, a valve core with a spherical bottom is arranged in the valve cavity, the top of the valve core is connected with a supporting piece arranged in the valve cavity through an elastic piece, and the bottom surface of the valve core is matched with a spherical structure at the inlet end of the valve cavity;
the underground water inlet part is a water inlet net which is arranged at the bottom of the valve body and has a cylindrical structure;
the counterweight part is a counterweight block arranged at the bottom of the water inlet net;
the impurity sampling part is a water permeable cylinder arranged on the top surface of the pipe body, and a filter screen for attaching impurities is sleeved outside the water permeable cylinder;
the hanging part is a perforated connecting piece which is arranged at the top of the permeable cylinder and is used for connecting the lifting mechanism.
2. A groundwater sampling device as claimed in claim 1, wherein: the valve body is connected with the pipe body in a threaded manner.
3. A groundwater sampling device as claimed in claim 1, wherein: the water permeable cylinder is connected with the connecting piece with the hole in a threaded manner.
4. A groundwater sampling device as claimed in claim 1, wherein: the supporting piece is a ring-shaped piece horizontally arranged in the valve cavity.
5. A groundwater sampling device as claimed in claim 1, wherein: the elastic parts are at least two and are uniformly distributed on the top surface of the valve core.
6. A groundwater sampling device as claimed in claim 1, wherein: the lifting mechanism comprises a winder arranged on the support frame, and a steel cable on the winder is connected with the connecting piece with the hole.
7. A groundwater sampling device as claimed in claim 6, wherein: the bottom support of the support frame is arranged on the telescopic wellhead support seat.
8. A groundwater sampling device as claimed in claim 7, wherein: the telescopic wellhead support seat comprises a connecting seat, two ends of the connecting seat are respectively provided with a sliding support arm, and the sliding support arms are fixed through locking bolts positioned on the side surfaces of the connecting seat; the middle part of the connecting seat is also provided with a through hole for the steel cable to pass through.
9. A groundwater sampling device as claimed in claim 8, wherein: the connecting base is internally provided with an inserting groove for accommodating the sliding supporting arm, and the end part of the sliding supporting arm is provided with a limiting block.
10. A sampling test method using the groundwater sampling device according to claim 9, characterized in that: the method comprises the following steps:
firstly, transversely placing a winder on a wellhead through a support frame or a telescopic wellhead support seat;
secondly, connecting and fixing a perforated connecting piece of the sampling device with a steel cable on a winder;
thirdly, putting the sampling device into the well to a certain depth through a winder, vertically standing for 30 seconds for sampling, and then pulling out the sampling device;
fourthly, inverting the sampling device, screwing the valve body to separate the sampling device from the pipe body, and then pouring out the groundwater sample in the pipe body;
fifthly, detecting the water quality of the underground water sample by using a water quality detector;
and sixthly, recording data.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010659968.0A CN111649990A (en) | 2020-07-10 | 2020-07-10 | Underground water sampling device and sampling detection method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010659968.0A CN111649990A (en) | 2020-07-10 | 2020-07-10 | Underground water sampling device and sampling detection method thereof |
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| CN111649990A true CN111649990A (en) | 2020-09-11 |
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| CN202010659968.0A Pending CN111649990A (en) | 2020-07-10 | 2020-07-10 | Underground water sampling device and sampling detection method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115343403A (en) * | 2022-08-16 | 2022-11-15 | 生态环境部南京环境科学研究所 | Detection device for benzene series in underground water of typical pesticide pollution site |
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2020
- 2020-07-10 CN CN202010659968.0A patent/CN111649990A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115343403A (en) * | 2022-08-16 | 2022-11-15 | 生态环境部南京环境科学研究所 | Detection device for benzene series in underground water of typical pesticide pollution site |
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