Underground water sampling equipment with well washing and low-flow-rate sampling functions

Abstract

The utility model relates to the technical field of underground water sampling, and discloses underground water sampling equipment with well washing and low-flow-rate sampling functions, which comprises an aquifer, a well wall arranged in the aquifer, a screen pipe fixedly connected to the inner wall of the well wall, a centrifugal pump arranged in the well wall, and a well washing pipe fixedly connected to an outlet of the centrifugal pump. According to the underground water sampling equipment with the well washing and low-flow-speed sampling functions, through the arranged cleaning mechanism, when impurities adhering to the outer side of a filter cylinder need to be cleaned, an inserting block can be moved out of the interior of a through opening, limiting is canceled, the filter cylinder can be pulled downwards, an inserting column is pulled out of the inner wall of an inserting base, and the filtering cylinder is pulled out; and similarly, the filter cartridge can be conveniently mounted under the action of the inclined surface of the insertion block, so that good mounting and dismounting efficiency can be achieved while cleaning is realized, the time consumed by workers is further saved, and the operation convenience of the device is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of groundwater sampling, in particular to groundwater sampling equipment with both well washing and low-flow rate sampling functions. Background Art

[0002] As people's environmental awareness gradually improves, their concern for groundwater quality is increasing. The underground distribution of groundwater is relatively complex. For plain areas, aquifers separated by aquitards are generally arranged in a vertical direction. Aquitards generally contain little water and prevent groundwater from passing through. Aquifers contain more water. In order to effectively monitor the quality of groundwater, relevant departments drill monitoring wells at specific locations and extract relevant aquifer water samples for analysis and testing to monitor the content of pollutants.

[0003] The walls of ordinary monitoring wells are made of waterproof materials. Special perforated screens are placed in the target aquifer so that the water in the aquifer can penetrate into the well pipe. Normally, the well water in the well pipe remains static and rarely exchanges with the underground aquifer. The water quality of well water that has been static for a long time is quite different from that of the target aquifer. In order to obtain representative water samples of the target aquifer, well washing is required in advance. Well washing is to extract well water from the well pipe and allow groundwater in the surrounding aquifer to flow into the well pipe. When the amount of water extracted is large enough, the originally static sedimentary water in the well pipe is completely replaced by fresh groundwater. At this time, the water in the well pipe is representative groundwater.

[0004] Generally, a centrifugal pump is used to pump water from underground monitoring wells to the surface. This type of pump has the characteristic of large flow rate and is suitable for large-flow well washing. However, it will produce a low-pressure area at the impeller inlet when it is working, causing volatile components in the water body to precipitate out of the water body, resulting in errors in the analysis results. However, traditional water pumps are generally used in conjunction with filtering devices, which are not easy to disassemble. Therefore, it is not convenient to disassemble and clean the impurities stuck on the filtering device during long-term use, and good operational convenience cannot be achieved. Utility Model Content

[0005] The purpose of the utility model is to provide a groundwater sampling device with both well washing and low flow rate sampling functions to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a groundwater sampling device with both well washing and low-flow rate sampling functions, comprising an aquifer, a well wall is arranged inside the aquifer, a screen tube is fixedly connected to the inner wall of the well wall, a centrifugal pump is arranged inside the well wall, a well washing pipe is fixedly connected to the outlet of the centrifugal pump, a circulation pool is fixedly connected to one end of the well washing pipe away from the centrifugal pump, a water quality sensor is arranged inside the circulation pool, a water pump power cord is arranged on one side of the centrifugal pump, a control box is fixedly connected to one end of the water pump power cord away from the centrifugal pump, and a power supply body is arranged on one side of the control box;

[0007] A compressed air pipe is provided on one side of the control box, an end of the compressed air pipe away from the control box is fixedly connected to an airbag pump, a socket is fixedly connected to the bottom end of the airbag pump, a plug is inserted into the socket, a filter cartridge is fixedly connected to the bottom of the plug, and a cleaning mechanism is provided on the outside of the filter cartridge;

[0008] The cleaning mechanism comprises a pushing component, the pushing component is arranged on one side of the socket, and a plug-in mechanism is arranged on one side of the pushing component;

[0009] The pushing assembly includes a fixed frame, which is fixedly connected to the outside of the socket. A spring A is fixedly connected to the inner wall of the fixed frame. A push plate is fixedly connected to one end of the spring A away from the inner wall of the fixed frame. A T-shaped shaft is fixedly connected to the side of the push plate close to the spring A. A through opening is opened on the outside of the socket.

[0010] Preferably, the plug-in mechanism includes a connecting groove, which is opened inside the plug column, and a spring B is fixedly connected to the inner wall of the connecting groove, and a slide is fixedly connected to one end of the spring B away from the inner wall of the connecting groove, and a plug-in block is fixedly connected to the side of the slide away from the spring B.

[0011] Preferably, two plug-in blocks are provided, through openings matching the two plug-in blocks are respectively opened on the outer sides of the plug posts, and the two plug-in blocks respectively penetrate the corresponding through holes.

[0012] Preferably, the slide plate is slidably connected to the inner wall of the connecting groove, one side of the plug-in block is an inclined surface, and the plug-in block is plugged into the inside of the through opening.

[0013] Preferably, a sliding hole is provided on a side of the fixing frame away from the socket, and the T-shaped shaft is slidably connected to the inner wall of the sliding hole.

[0014] Preferably, the spring A is sleeved on the outer wall of the T-shaped shaft, and the push plate is slidably connected to the inner wall of the through opening.

[0015] Preferably, the outlet of the airbag pump is fixedly connected to a sampling tube, one end of the sampling tube away from the airbag pump is fixedly connected to a sample storage device, an air source is provided on one side of the control box, and the water quality sensor is fixedly connected to one side of the control box.

[0016] Compared with the prior art, the utility model provides a groundwater sampling device with both well washing and low flow rate sampling functions, which has the following beneficial effects:

[0017] 1. The groundwater sampling equipment with both well washing and low-flow rate sampling functions has a cleaning mechanism. When it is necessary to clean the impurities stuck on the outside of the filter cartridge, first, the two T-shaped shafts are pressed simultaneously to move in the direction close to the fixed frame, so that the T-shaped shaft can push the plug-in block to retract into the inside of the connecting groove through the push plate, and at the same time, the slide plate can be driven to compress the spring B. At this time, the plug-in block will move out from the inside of the through opening, and the limit will be cancelled. At this time, the filter cartridge can be pulled downward to pull the plug post out of the inner wall of the socket, so that the filter cartridge can be disassembled. Similarly, the filter cartridge is also easy to install under the action of the inclined surface of the plug-in block, so that good installation and disassembly efficiency can be achieved while cleaning, further saving the time spent by the staff and improving the convenience of device operation.

[0018] 2. This groundwater sampling equipment, which has both well washing and low-flow sampling functions, uses a low-flow sampling airbag pump for sampling. This pump is a volumetric fluid pump that intermittently extracts water samples from the monitoring well through compression and expansion of the airbag in the pump body. This pump does not produce drastic pressure changes when working, has no effect on volatile components in the water body, and can obtain reliable water samples. However, this pump generally has a small flow rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative labor:

[0020] Figure 1 This is a front view of the structure of the utility model;

[0021] Figure 2 It is a schematic diagram of the structure of the airbag pump;

[0022] Figure 3 It is a cross-sectional view looking up at the socket;

[0023] Figure 4 It is a top view of the socket;

[0024] Figure 5 for Figure 3Enlarged structural diagram at A in the middle.

[0025] In the figure: 1, aquifer; 2, screen tube; 3, centrifugal pump; 4, well wall; 5, well washing pipe; 6, circulation pool; 7, water quality sensor; 8, water pump power cord; 9, control box; 10, power supply body; 11, air source; 12, compressed air pipe; 13, sampling tube; 14, sample storage device; 15, air bag pump; 16, cleaning mechanism; 161, pushing assembly; 1611, fixing frame; 1612, spring A; 1613, T-shaped shaft; 1614, push plate; 1615, through port; 162, plug-in mechanism; 1621, connecting groove; 1622, spring B; 1623, slide plate; 1624, plug-in block; 17, socket; 18, filter cartridge; 19, plug column. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] The utility model provides the following technical solutions:

[0029] Combination Figures 1 to 5 , a groundwater sampling device with both well washing and low-flow rate sampling functions, comprising an aquifer 1, a well wall 4 is arranged inside the aquifer 1, a screen tube 2 is fixedly connected to the inner wall of the well wall 4, a centrifugal pump 3 is arranged inside the well wall 4, a well washing pipe 5 is fixedly connected to the outlet of the centrifugal pump 3, a circulation pool 6 is fixedly connected to the end of the well washing pipe 5 away from the centrifugal pump 3, a water quality sensor 7 is arranged inside the circulation pool 6, a water pump power line 8 is arranged on one side of the centrifugal pump 3, a control box 9 is fixedly connected to the end of the water pump power line 8 away from the centrifugal pump 3, and a power supply body 10 is arranged on one side of the control box 9;

[0030] A compressed air pipe 12 is provided on one side of the control box 9, and an air bag pump 15 is fixedly connected to one end of the compressed air pipe 12 away from the control box 9, and a socket 17 is fixedly connected to the bottom end of the air bag pump 15, and a plug 19 is inserted inside the socket 17, and a filter cartridge 18 is fixedly connected to the bottom of the plug 19, and a cleaning mechanism 16 is provided on the outside of the filter cartridge 18;

[0031] The cleaning mechanism 16 includes a pushing component 161, which is disposed on one side of the socket 17, and a plug-in mechanism 162 is disposed on one side of the pushing component 161;

[0032] The pushing assembly 161 includes a fixed frame 1611, which is fixedly connected to the outer side of the socket 17. A spring A1612 is fixedly connected to the inner wall of the fixed frame 1611. An end of the spring A1612 away from the inner wall of the fixed frame 1611 is fixedly connected to a push plate 1614. A side of the push plate 1614 close to the spring A1612 is fixedly connected to a T-shaped shaft 1613. A through opening 1615 is opened on the outer side of the socket 17.

[0033] Furthermore, the plug-in mechanism 162 includes a connecting groove 1621, which is opened inside the plug column 19, and a spring B1622 is fixedly connected to the inner wall of the connecting groove 1621, and a slide plate 1623 is fixedly connected to one end of the spring B1622 away from the inner wall of the connecting groove 1621, and a plug-in block 1624 is fixedly connected to the side of the slide plate 1623 away from the spring B1622.

[0034] Furthermore, two plug-in blocks 1624 are provided, and through openings 1615 matching the two plug-in blocks 1624 are respectively opened on the outer sides of the plug posts 19, and the two plug-in blocks 1624 pass through the corresponding through holes respectively.

[0035] Furthermore, the slide plate 1623 is slidably connected to the inner wall of the connection groove 1621 , one side of the plug-in block 1624 is an inclined surface, and the plug-in block 1624 is plugged into the inside of the through opening 1615 .

[0036] Furthermore, a sliding hole is formed on a side of the fixing frame 1611 away from the socket 17 , and the T-shaped shaft 1613 is slidably connected to the inner wall of the sliding hole.

[0037] Furthermore, the spring A1612 is sleeved on the outer wall of the T-shaped shaft 1613 , and the push plate 1614 is slidably connected to the inner wall of the through opening 1615 .

[0038] Furthermore, the outlet of the airbag pump 15 is fixedly connected to a sampling tube 13 , one end of the sampling tube 13 away from the airbag pump 15 is fixedly connected to a sample storage device 14 , an air source 11 is provided on one side of the control box 9 , and the water quality sensor 7 is fixedly connected to one side of the control box 9 .

[0039] In actual operation, when the device is used, the outlet of the centrifugal pump 3 is installed with a well-washing pipe 5, the tail of the well-washing pipe 5 is installed at the inlet of the circulation pool 6, the water pump power line 8 of the centrifugal pump 3 is connected to the control box 9, the water quality sensor 7 is installed in the circulation pool 6, the data line of the water quality sensor 7 is connected to the control box 9, the power supply body 10 is connected to the control box 9 to provide energy for the system, the air source 11 is connected to the control box 9 to provide compressed air for the system, the air inlet of the airbag pump 15 is installed with a compressed air pipe 12, the tail end of the compressed air pipe 12 is connected to the control box 9, the outlet of the airbag pump 15 is installed with a sampling pipe 13, and the tail end of the sampling pipe 13 is connected to the sample storage 14;

[0040] After the system is installed, it starts to work. First, the control box 9 drives the centrifugal pump 3 to extract well water to the circulation pool 6 through the well washing pipe 5. At this time, the water quality sensor 7 transmits the water quality parameters of the extracted water to the control box 9. The self-control circuit in the control box 9 judges the water quality parameters. When the water quality parameters are stable, it means that the well washing is completed and sampling can be done.

[0041] After sampling begins, the control box turns off the centrifugal pump 3, and intermittently inflates and deflates the airbag pump 15 through the compressed air pipe 12. When inflating, the water sample is extracted into the sample storage 14, and when deflated, the well water enters the airbag pump 15. After multiple cycles of inflation and deflation, the sample storage 14 is filled, and the work is completed;

[0042] When it is necessary to clean the impurities stuck on the outside of the filter cartridge 18, first press the two T-shaped shafts 1613 at the same time to move them in the direction close to the fixed frame 1611, so that the T-shaped shaft 1613 can push the plug block 1624 to retract into the interior of the connecting groove 1621 through the push plate 1614, and at the same time, it can drive the slide plate 1623 to compress the spring B1622. At this time, the plug block 1624 will move out from the inside of the through opening 1615, and the limit will be cancelled. At this time, the filter cartridge 18 can be pulled downward to pull the plug column 19 out of the inner wall of the socket 17, so that the filter cartridge 18 can be disassembled. Similarly, the inclined surface of the plug block 1624 also facilitates the installation of the filter cartridge 18, so that good installation and disassembly efficiency can be achieved while cleaning, further saving the time spent by the staff and improving the convenience of device operation.

[0043] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

Claims

1. A groundwater sampling device with both well washing and low-flow rate sampling functions, comprising an aquifer (1), characterized in that: A well wall (4) is arranged inside the aquifer (1), a screen tube (2) is fixedly connected to the inner wall of the well wall (4), a centrifugal pump (3) is arranged inside the well wall (4), a well-washing pipe (5) is fixedly connected to the outlet of the centrifugal pump (3), an end of the well-washing pipe (5) away from the centrifugal pump (3) is fixedly connected to a circulation pool (6), a water quality sensor (7) is arranged inside the circulation pool (6), a water pump power line (8) is arranged on one side of the centrifugal pump (3), an end of the water pump power line (8) away from the centrifugal pump (3) is fixedly connected to a control box (9), and a power supply body (10) is arranged on one side of the control box (9); A compressed air pipe (12) is provided on one side of the control box (9); an end of the compressed air pipe (12) away from the control box (9) is fixedly connected to an air bag pump (15); a socket (17) is fixedly connected to the bottom end of the air bag pump (15); a plug post (19) is inserted into the socket (17); a filter cartridge (18) is fixedly connected to the bottom of the plug post (19); a cleaning mechanism (16) is provided on the outside of the filter cartridge (18); The cleaning mechanism (16) comprises a pushing component (161), the pushing component (161) is arranged on one side of the socket (17), and a plug-in mechanism (162) is arranged on one side of the pushing component (161); The pushing assembly (161) comprises a fixed frame (1611), wherein the fixed frame (1611) is fixedly connected to the outer side of the socket (17), a spring A (1612) is fixedly connected to the inner wall of the fixed frame (1611), an end of the spring A (1612) away from the inner wall of the fixed frame (1611) is fixedly connected to a push plate (1614), a side of the push plate (1614) close to the spring A (1612) is fixedly connected to a T-shaped shaft (1613), and a through opening (1615) is provided on the outer side of the socket (17).

2. The groundwater sampling device with both well washing and low flow rate sampling functions according to claim 1 is characterized in that: The plug-in mechanism (162) comprises a connection groove (1621), wherein the connection groove (1621) is arranged inside the plug post (19), a spring B (1622) is fixedly connected to the inner wall of the connection groove (1621), an end of the spring B (1622) away from the inner wall of the connection groove (1621) is fixedly connected to a slide plate (1623), and a side of the slide plate (1623 away from the spring B (1622) is fixedly connected to a plug-in block (1624).

3. The groundwater sampling device with both well washing and low flow rate sampling functions according to claim 2 is characterized in that: Two plug-in blocks (1624) are provided, and through openings (1615) matching the two plug-in blocks (1624) are respectively opened on the outer sides of the plug posts (19), and the two plug-in blocks (1624) respectively penetrate corresponding through holes.

4. The groundwater sampling device with both well washing and low flow rate sampling functions according to claim 2 is characterized in that: The slide plate (1623) is slidably connected to the inner wall of the connection groove (1621), one side of the plug-in block (1624) is an inclined surface, and the plug-in block (1624) is plugged into the interior of the through opening (1615).

5. The groundwater sampling device with both well washing and low flow rate sampling functions according to claim 1, characterized in that: A sliding hole is provided on a side of the fixing frame (1611) away from the socket (17), and the T-shaped shaft (1613) is slidably connected to the inner wall of the sliding hole.

6. The groundwater sampling device with both well washing and low flow rate sampling functions according to claim 1, characterized in that: The spring A (1612) is sleeved on the outer wall of the T-shaped shaft (1613), and the push plate (1614) is slidably connected to the inner wall of the through hole (1615).

7. The groundwater sampling device with both well washing and low-flow rate sampling functions according to claim 1 is characterized in that: The outlet of the airbag pump (15) is fixedly connected to a sampling tube (13), one end of the sampling tube (13) away from the airbag pump (15) is fixedly connected to a sample storage device (14), one side of the control box (9) is provided with an air source (11), and the water quality sensor (7) is fixedly connected to one side of the control box (9).

Images