A sampling device for groundwater microbial detection

Abstract

The present invention discloses a sampling device for groundwater microorganism detection, including a sampling cylinder, the outer wall of the sampling cylinder is provided with a water inlet, and the opening and closing of the water inlet is controlled by a driving component, a hook is fixedly provided at the center of the top of the sampling cylinder, a sling is fixedly provided at the hook, the sampling cylinder includes a cylinder body and a sampling component, the cylinder body is composed of a lower bottom plate and an upper outer cover installed on the top, the driving component is installed above the lower bottom plate, and the sampling component is installed on one side above the lower bottom plate and located on one side of the driving component. The present invention is aimed at improving the problems in the prior art that it is not convenient to replace the sampling tube when sampling groundwater at different depths and different locations. The present invention has the advantages of being able to realize automatic replacement of the sampling tube when sampling groundwater at different depths and different locations, and avoiding cross contamination of water samples at different depths and different locations.

Description

Technical Field

[0001] The invention relates to the technical field of groundwater sampling, and in particular to a sampling device for groundwater microorganism detection. Background Art

[0002] Groundwater monitoring is for groundwater monitoring management departments to monitor groundwater levels, water quality and other data within their jurisdiction in order to keep abreast of dynamic changes and provide long-term protection for groundwater. When monitoring groundwater quality, groundwater sampling and testing are required. For example, by conducting microbial testing on groundwater, it is possible to quickly understand the types and quantities of microorganisms in water resources, thereby helping scientific researchers to accurately analyze the content of harmful substances in water bodies and provide important data support for water resource research and development. Since the diversity of microbial communities in groundwater is affected by depth, water samples at different depths need to be collected when sampling groundwater. At the same time, in order to have a more comprehensive understanding of the water quality in a region, sampling needs to be carried out at multiple locations.

[0003] In the prior art, when sampling groundwater, the sampling tube is generally suspended and lowered into the groundwater by a rope. After reaching the required depth, the water inlet of the sampling tube is opened to allow the water sample to enter the sampling tube. When sampling at other depths, the sampling tube is generally taken out and replaced, and then the replaced sampling tube is lowered into the water to sample water at other depths. Replacing the sampling tube makes the sampling steps cumbersome and too troublesome. Therefore, a sampling device that can automatically replace the sampling tube is needed, such as an automatic groundwater sampling device with application number 202120636520.7, in which a plurality of water storage bottles are provided and when sampling, When sampling at different depths, the conical nozzle is moved by an electric slide so that the conical nozzle can be aimed at other water bottles, so that the water sample sucked by the second hose can be distinguished by the water bottles, so that water samples of different depths can be stored in different water bottles, so that the replacement of water bottles can be automatically completed, which is more convenient. However, since water samples of different depths all enter different water bottles through the second hose and the sampling tube, when sampling water samples of different depths, the water samples are easily mixed with the residual water samples that passed through the previous time when passing through the second hose and the sampling tube, thereby reducing the sampling accuracy of different depths and making the water samples of different depths not accurate enough.

[0004] In response to the above technical problems, the present invention discloses a sampling device for groundwater microbial detection. The present invention has the advantages of being able to automatically replace sampling tubes when sampling groundwater at different depths and locations, thereby avoiding cross-contamination between water samples at different depths and locations. Summary of the invention

[0005] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a sampling device for groundwater microbial detection to solve the technical problems in the prior art such as the inconvenience of replacing sampling tubes when sampling groundwater at different depths and different locations. The present invention has the advantages of automatically replacing sampling tubes when sampling groundwater at different depths and different locations, avoiding cross-contamination of water samples at different depths and different locations, etc.

[0006] The present invention is implemented through the following technical solutions: The present invention discloses a sampling device for groundwater microorganism detection, including a sampling cylinder, the outer wall of the sampling cylinder is provided with a water inlet, and the opening and closing of the water inlet is controlled by a driving component, a hook is fixedly provided at the center of the top of the sampling cylinder, a sling is fixedly provided at the hook, the sampling cylinder includes a cylinder body and a sampling component, the cylinder body is composed of a lower bottom plate and an upper outer cover installed on the upper part, the driving component is installed above the lower bottom plate, and the sampling component is installed on one side above the lower bottom plate and located on one side of the driving component;

[0007] The sampling component includes a fixed box, a sleeve, a sampling tube and a connecting hole. The fixed box is fixedly arranged on the upper end surface of the lower base plate. The sleeve is arranged inside the fixed box, and there are multiple sleeves. A sampling tube is inserted into each sleeve. A connecting hole is opened on the outer wall of one side of the fixed box. The connecting hole is concentric with and connected to the water inlet. A sampling port is opened at one end of the sampling tube, and the sampling port faces the connecting hole. A switching component for moving and switching the sampling tube is arranged inside the fixed box. A plug-in hole is arranged on the outer wall of the other side of the fixed box at a position corresponding to the connecting hole, and the plug-in hole is concentric with the connecting hole. The driving component is configured to push the sampling tube inside the fixed box toward the connecting hole. The inner walls of the connecting hole and the water inlet are both provided with sealing fillings, and a protruding port is opened at the center of the sealing filling.

[0008] Furthermore, the switching component includes gears, chains and conveyor belts. There are two gears, which are respectively arranged inside a fixed box. A rotating shaft is fixedly arranged at the gears, and both ends of the rotating shaft are rotatably connected to the inner wall of the fixed box respectively. A chain is meshed with the outer wall of the gear, and a conveyor belt is fixedly arranged on the outer wall of the chain. A sleeve is fixedly arranged on the outer wall of the conveyor belt, and the sleeves of the outer wall of the conveyor belt are arranged at equal intervals on the outer wall of the conveyor belt. The rotation of the gear is driven by a driving motor.

[0009] Furthermore, the driving assembly is configured as an electric push rod, and a push rod assembly is fixedly provided at the extended shaft of the electric push rod, the sampling tube is provided with a cone at one end with an opening, and the tip faces the connecting hole, and a side panel of the fixed box is configured as a detachable connection.

[0010] Furthermore, the sampling tube is configured to include a tube body, a partition, a piston, a pumping rod, a top plate and a first spring. One end of the tube body is set to be conical, and the sampling port is opened at one end of the cone. A socket is opened at the other end of the tube body. A partition is fixedly arranged inside the tube body, and the inner cavity of the tube body is divided into a first compartment and a second compartment by the partition. A piston is arranged inside the second compartment, and a pumping rod is fixedly arranged at one end of the piston close to the socket, and the other end of the pumping rod extends to the first compartment through the partition. A top plate is fixedly arranged at one end of the pumping rod located in the first compartment, and a first spring is arranged between the top plate and the partition and is sleeved on the outside of the pumping rod.

[0011] Furthermore, the push rod assembly is configured to include a fixed plate, a first push rod and a second push rod, the fixed plate is fixedly arranged at one end of the telescopic shaft of the electric push rod, the first push rod is fixedly arranged on a side of the fixed plate facing the socket, and the first push rod, the socket hole and the socket are concentric, the second push rod is fixedly arranged on the outer wall of the fixed plate, and a control plate is fixedly sleeved on the outer wall of one end of the tube body facing the socket, and the outer diameter of the control plate is larger than the inner diameter of the socket hole, the length of the second push rod is longer than the first push rod, the second push rod includes an outer tube, a second spring, a pressure plate and a push rod, a pressure plate is arranged on one side of the inner part of the outer tube, and the outer wall of the pressure plate is slidably matched with the inner wall of the outer tube, a second spring is arranged between the pressure plate and the inner wall of the other end of the outer tube, a push rod is also fixedly arranged on the outer wall of the pressure plate, and one end of the push rod slides through the outer wall of one end of the outer tube and extends to the outside of the outer tube, and the end of the push rod located outside the outer tube is fixedly connected to the fixed plate.

[0012] Furthermore, a buckle assembly is provided at one end of the outer tube adjacent to the control board.

[0013] Furthermore, the snap-on assembly includes a plug-in block, a plug-in ball, a plug-in slot and a through hole. The plug-in block is fixedly arranged on the outer wall of one end of the control board facing the through hole, the plug-in ball is fixedly arranged at one end of the plug-in block, the plug-in slot and the through hole are opened at one end of the outer tube, and the plug-in slot is connected to the outside through the through hole, the plug-in ball is plug-fitted with the plug-in slot, the plug-in block is plug-fitted with the through hole, and the maximum outer diameter of the plug-in ball is larger than the inner diameter of the through hole, and the plug-in ball is made of elastic material.

[0014] Furthermore, a limit strip is provided on the outer wall of the tube body, a limit groove is provided on the inner wall of the sleeve, and the limit strip is slidably plugged into and matched with the limit groove.

[0015] Furthermore, the sling is wound by an automatic winding machine, and a conical counterweight cone is arranged below the sling, and the tip of the conical counterweight cone faces downward.

[0016] Furthermore, an induction plate is fixedly provided on the outer wall of the fixed plate, a sensor is provided on one side of the induction plate, and the sensor is fixedly installed above the lower base plate through a mounting frame, and the sensor, the drive motor and the electric push rod are electrically connected to each other.

[0017] The present invention has the following advantages:

[0018] The present invention provides a switching component so that the sampling tube can be automatically replaced when collecting water samples at different locations and different depths. When collecting water samples at different depths, there is no need to lift the sampling tube up and down multiple times to replace the sampling tube. It only needs to be lowered from shallow to deep underwater to collect water, thereby avoiding water flow disturbance caused by repeatedly lifting the sampling tube up and down to affect the water sample collection accuracy. In addition, by providing the sampling tube and the driving component, when collecting water samples, the water sample can be automatically sucked into the tube body through the movement of the piston, thereby making the water sample collection efficiency higher. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 It is a schematic diagram of the internal structure of the cylinder of the present invention;

[0021] Figure 3 It is a partial cross-sectional structural schematic diagram of the cylinder and the fixing box of the present invention from the front;

[0022] Figure 4 It is a schematic diagram of the structure of the fixing box and the plug hole of the present invention;

[0023] Figure 5 It is a schematic diagram of the internal structure of the fixing box of the present invention;

[0024] Figure 6 It is a schematic diagram of the connecting hole structure of the present invention;

[0025] Figure 7 It is a schematic diagram of the sampling tube structure of the present invention;

[0026] Figure 8 For the present invention Figure 2 A schematic diagram of the local enlarged structure at B;

[0027] Fig. 9 It is a schematic diagram of the exhaust state structure of the sampling tube of the present invention;

[0028] Fig.10 It is a schematic diagram of the internal structure of the second push rod of the present invention;

[0029] Fig.11 For the present invention Figure 5 A schematic diagram of the local enlarged structure at C;

[0030] Fig.12 It is a schematic diagram of the buckle assembly structure of the present invention;

[0031] Fig.13 For the present invention Figure 2 A local enlarged structural schematic diagram;

[0032] Fig.14 It is a schematic diagram of the sleeve structure of the present invention.

[0033] In the figure: 1, sampling cylinder; 2, water inlet; 3, driving assembly; 4, hook; 5, sling; 6, automatic winding machine; 7, plug hole; 8, sealing filling; 9, top rod assembly; 10, sampling port; 11, plug hole; 12, first compartment; 13, second compartment; 14, control board; 15, buckle assembly; 16, switching assembly; 17, driving motor; 18, induction board; 19, sensor; 20, mounting frame; 21, conical counterweight cone; 22, limit groove; 23, limit strip; 101, cylinder; 102, sampling assembly; 1011, lower bottom plate; 1012, upper outer cover; 102 1. Fixing box; 1022. Casing; 1023. Sampling tube; 1024. Connecting hole; 10231. Tube body; 10232. Partition; 10233. Piston; 10234. Pumping rod; 10235. Top plate; 10236. First spring; 91. Fixing plate; 92. First push rod; 93. Second push rod; 931. Outer tube; 932. Second spring; 933. Pressing plate; 934. Push rod; 151. Plug-in block; 152. Plug-in ball; 153. Plug-in slot; 154. Through hole; 161. Gear; 162. Chain; 163. Conveyor belt; 164. Rotating shaft. Implementation

[0034] The following is a detailed description of an embodiment of the present invention. This embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation method and a specific operation process are given. However, the protection scope of the present invention is not limited to the following embodiments. In the description of the present invention, words indicating directions or positional relationships such as "front", "rear", "left", and "right" are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention. Example

[0035] Example 1 discloses a sampling device for groundwater microbial detection, such as Figure 1-Figure 14As shown, it includes a sampling tube 1, the outer wall of the sampling tube 1 is provided with a water inlet 2, and the opening and closing of the water inlet 2 is controlled by a driving component 3. In addition, a hook 4 is fixedly provided at the center of the top of the sampling tube 1, and a sling 5 is fixedly provided at the hook 4. Specifically, the outer wall of the sling 5 can be provided with a scale, so that the descent depth of the sampling tube 1 can be judged according to the scale on the sling 5. The sling 5 is wound by an automatic winding machine 6. In addition, a conical counterweight cone 21 is provided below the sling 5, and the conical counterweight cone 21 The tip of the sample tube 1 faces downward, thereby reducing the descending resistance through the setting of the conical counterweight cone 21, making the sampling tube 1 descend more smoothly in the water, and the weight of the conical counterweight cone 21 keeps the sampling tube 1 vertically downward, so that the sling 5 is tightened, so that the judgment of the descending depth of the sampling tube 1 is more accurate. When sampling, the automatic winding machine 6 is rotated to unwind the sling 5, so that the sampling tube 1 is lowered into the water and after it descends to the required depth, the water inlet 2 is opened for sampling;

[0036] Specifically, the sampling barrel 1 includes a barrel 101 and a sampling assembly 102, wherein the barrel 101 is composed of a lower bottom plate 1011 and an upper outer cover 1012, the upper outer cover 1012 is a cylindrical barrel 101 with an opening at the bottom, and the upper outer cover 1012 is arranged above the lower bottom plate 1011, and the upper outer cover 1012 and the lower bottom plate 1011 are detachably connected by screws, and in addition, a sealing rubber pad may be provided on the contact surface between the upper outer cover 1012 and the lower bottom plate 1011 to prevent water from entering the barrel 101, and the driving assembly 3 is located inside the barrel 101, and the driving assembly 3 is installed above the lower bottom plate 1011, and the sampling assembly 102 is installed on one side above the lower bottom plate 1011 and on one side of the driving assembly 3;

[0037] More specifically, the sampling assembly 102 includes a fixed box 1021, a sleeve 1022, a sampling tube 1023 and a connecting hole 1024, wherein the fixed box 1021 is fixedly arranged on the upper end surface of the lower bottom plate 1011, and the sleeve 1022 is arranged inside the fixed box 1021, and the sampling tube 1023 is plugged into the inside of the sleeve 1022. In addition, a connecting hole 1024 is opened on the outer wall of one side of the fixed box 1021, and the connecting hole 1024 is located on the same horizontal axis as the center of the water inlet 2 and is connected to each other, so that the outer surface of the upper cover 1012 is connected to the outer surface of the upper cover 1012. The interior of the fixed box 1021 is connected, and the centers of the connecting hole 1024, the water inlet 2, the sleeve 1022 and the sampling tube 1023 are all on the same horizontal axis. In addition, it should be noted that a sampling port 10 is provided at one end of the sampling tube 1023, and the sampling port 10 faces the connecting hole 1024, and a plug hole 7 is provided on the outer wall of the other side of the fixed box 1021 and at a position corresponding to the connecting hole 1024, and the plug hole 7 and the connecting hole 1024 are on the same horizontal axis. Therefore, the sampling tube 1023 inside the fixed box 1021 can be driven by the driving component 3. The cylinder 101 is pushed toward the connecting hole 1024, so that the end of the sampling tube 1023 provided with the sampling port 10 extends out of the fixed box 1021 through the connecting hole 1024 and the water inlet 2, so that the end of the sampling tube 1023 provided with the opening can enter the water for water sample collection. When the cylinder 101 enters the water, in order to prevent water from entering the fixed box 1021, a sealing filler 8 is provided on the inner wall of the connecting hole 1024 and the water inlet 2, and a protruding gap is opened at the center of the sealing filler 8. It should be noted that under normal conditions, the protruding port is in a sealed state. When the sampling tube 1023 is in a sealed state ... When one end of the tube 1023 enters the connecting hole 1024 and the water inlet 2, one end of the sampling tube 1023 is inserted into the extension port and extends from the extension port into the water. Specifically, the sealing filler 8 can be configured to be composed of two tightly fitting air bags, and when the sampling tube 1023 enters the connecting hole 1024, it can be inserted into the fitting gap of the sealing filler 8 and extend from the fitting gap into the water. When the sampling tube 1023 returns to the interior of the fixing box 1021, due to the characteristics of the air bags, the two air bags continue to fit tightly and seal the connecting hole 1024.

[0038] Optimally, the driving assembly 3 is configured as an electric push rod 934, and a push rod assembly 9 is fixedly provided at the extended shaft of the electric push rod 934, and the push rod assembly 9 is moved laterally by starting the electric push rod 934, so that the push rod assembly 9 can enter the interior of the fixed box 1021 through the plug hole 7 to push the sampling tube 1023, so that the end of the sampling tube 1023 provided with the sampling port 10 can pass through the air bag and enter the water for sampling;

[0039] In order to make the sampling tube 1023 smoother when it is moved and inserted into the gap between the two air bags, the end of the sampling tube 1023 with an opening is provided with a cone, and the tip is facing the connecting hole 1024. In addition, in order to allow the staff to take out the internal water sample after sampling, a side panel of the fixing box 1021 is provided with a detachable connection. Specifically, a side panel of the fixing box 1021 is detachably connected by screws, and a sealing gasket is provided on a side of the panel that contacts the fixing box 1021. Therefore, when it is necessary to take out the sampling tube 1023, the barrel 101 can be disassembled first, and then the panel of the fixing box 1021 can be disassembled, so that the inside of the fixing box 1021 is exposed, and then the sampling tube 1023 can be directly pulled out.

[0040] Therefore, in summary, when groundwater sampling is required, the device is moved to the sampling point, and then the sampling tube 1 is lowered underwater by the automatic winding machine 6. When the sampling tube 1 is lowered to the specified underwater depth, the electric push rod 934 is turned on, so that the electric push rod 934 drives the push rod assembly 9 to move horizontally, so that the push rod assembly 9 passes through the plug hole 7 and pushes the sampling tube 1023 inside the fixed box 1021, so that one end of the sampling tube 1023 passes through the air bag and enters the water for sampling, thereby completing the groundwater sampling. When the sampling tube 1023 enters the water, the water sample flows into the tube through the sampling port 10. When the water sample flows into the tube, there is no other suction force, which will make the sampling time of the sampling tube 1023 not fast enough. When a large When sampling in batches at multiple locations, work efficiency will be affected, and the capacity of the collected water samples cannot be guaranteed. Therefore, in order to make the sampling tube 1023 enter the water to collect water with better water collection efficiency, the sampling tube 1023 is configured to include a tube body 10231, a partition 10232, a piston 10233, a pumping rod 10234, a top plate 10235 and a first spring 10236, wherein one end of the tube body 10231 is set to be conical, and the sampling port 10 is opened at one end of the cone, and the other end of the tube body 10231 is opened with a jack 11, and the interior of the tube body 10231 is fixedly provided with a partition 10232, and the inner cavity of the tube body 10231 is divided into a first compartment 12 and a second compartment 13 by the partition 10232, wherein the tube body 10231 near the sampling port 10 One end is the second compartment 13, and the end near the insertion hole 11 is the first compartment 12, a piston 10233 is arranged inside the second compartment 13, and the outer wall of the piston 10233 fits and slides with the interior of the second compartment 13, and a draw rod 10234 is fixedly arranged at the end of the piston 10233 near the insertion hole 11, and the other end of the draw rod 10234 extends to the first compartment 12, specifically, a draw hole is opened at the center of the partition 10232, and the other end of the draw rod 10234 extends to the first compartment 12 through the draw hole, and a top plate 10235 is fixedly arranged at one end of the draw rod 10234 located in the first compartment 12, and a first spring 10236 is arranged between the top plate 10235 and the partition 10232, and the first spring 1 0236 is sleeved on the outside of the pumping rod 10234, so that when sampling water samples, it can be inserted into the tube body 10231 through the push rod assembly 9, and the partition 10232 is pushed by the push rod assembly 9, so that the pumping rod 10234 drives the piston 10233 to move, and the air inside the second compartment 13 is discharged. Then the push rod assembly 9 returns, and the pumping rod 10234 drives the piston 10233 to move toward the insertion hole 11 through the action of the first spring 10236. The movement of the piston 10233 will cause negative pressure to be generated inside the second compartment 13, so that the water sample can be sucked into the second compartment 13. Therefore, the water sample is sucked into the tube body 10231 by the piston 10233, which can make the collection efficiency of the tank water sample higher.And by actively absorbing water into the second compartment 13, the amount of water collected can be guaranteed;

[0041] When the top plate 10235 is pushed by the top rod assembly 9 to collect water, the sampling port 10 at one end of the tube body 10231 needs to enter the water first. Therefore, the top rod assembly 9 is configured to include a fixed plate 91, a first top rod 92 and a second top rod 93, wherein the fixed plate 91 is fixedly arranged at one end of the telescopic shaft of the electric push rod 934, and the first top rod 92 is fixedly arranged on a side of the fixed plate 91 facing the socket 11, and the first top rod 92, the plug hole 7 and the socket 11 are concentric, and two second top rods 93 are provided, and the two second top rods 93 are respectively arranged above and below the first top rod 92 and fixedly connected to the fixed plate 91. It should be noted that the first top rod 92 and the two second top rods 93 can both enter the interior of the fixed box 1021 through the socket 11. In addition, a control board 14 is fixedly sleeved on the outer wall of one end of the tube body 10231 facing the socket 11, and the outer diameter of the control board 14 is larger than the inner diameter of the socket hole 7. In addition, the distance between the second push rod 93 and the first push rod 92 is larger than the outer diameter of the tube body 10231, so that when the first push rod 92 enters the interior of the socket 11, the second push rod 93 will contact with the control board 14. Therefore, when the electric push rod 934 is started, the electric push rod 934 drives the transverse movement assembly to move toward the fixed box 1021, and the first push rod 92 and the two second push rods 93 will enter the interior of the fixed box 1021 through the socket hole 7, and the first push rod 92 will enter the interior of the tube body 10231 through the socket 11 and push the top plate 10235, and the second push rod 93 will contact with the control board 14 contacts and pushes the tube body 10231 toward the water inlet 2 with the lateral movement. Since the tube body 10231 needs to stop moving when one end of the tube body 10231 passes through the airbag and enters the water, the first push rod 92 then pushes the top plate 10235 to absorb water. Therefore, the length of the second push rod 93 is set to be longer than the first push rod 92. At the same time, the second push rod 93 is configured to include an outer tube 931, a second spring 932, a pressure plate 933 and a push rod 934. Among them, the outer tube 931 is a tube body 10231 sealed at both ends, and a pressure plate 933 is provided on one side of the inner part of the outer tube 931, and the outer wall of the pressure plate 933 is slidably matched with the inner wall of the outer tube 931, and a second spring 932 is provided between the pressure plate 933 and the inner wall of the other end of the outer tube 931. , a push rod 934 is also fixedly provided on the outer wall of the pressure plate 933, and one end of the push rod 934 slides through the outer wall of one end of the outer tube 931 and extends to the outside of the outer tube 931, and the end of the push rod 934 located outside the outer tube 931 is fixedly connected to the fixing plate 91. Therefore, when the electric push rod 934 is started, the first push rod 92 and the second push rod 93 move horizontally and enter the interior of the fixing box 1021 through the plug hole 7. When the first push rod 92 and the second push rod 93 enter the interior of the fixing box 1021, the second push rod 93 will first contact the control board 14, and the tube body 10231 will be pushed toward the sampling port 10 through the control board 14 through the continuous horizontal movement of the second push rod 93, so that one end of the tube body 10231 passes through the air bag and enters the water. It should be noted that,The outer diameter of the tube body 10231 is larger than the inner diameter of the sampling port 10. Therefore, when the tapered end of the tube body 10231 passes through the airbag and enters the water, the tube body 10231 will be blocked and cannot move laterally because the outer diameter of the tube body 10231 is larger than the inner diameter of the sampling port 10. Since the fixing plate 91 will continue to move laterally as the electric push rod 934 is started, the push rod 934 will push the pressure plate 933 to compress the second spring 932, so that the second push rod 93 will not affect the continuous lateral movement of the first push rod 92. Then, the first push rod 92 will enter the tube body 10231 through the jack 11 to push the top plate 10235 to sample water.

[0042] When the water sampling is completed, the electric push rod 934 drives the push rod assembly 9 to reset, and the fixed plate 91 drives the first push rod 92 and the push rod 934 to reset. When the push rod 934 is reset, the push rod 934 drives the pressure plate 933 to reset. Through the action of the second spring 932, the outer tube 931 will continue to contact with the control board 14, and the outer tube 931 will not separate from the control board 14, so that the sampling port 10 of the tube body 10231 is continuously in the water. At this time, the first push rod 92 is reset, and the first spring 10236 resets the top plate 10235, thereby driving the piston 10233 to move toward the direction of the jack 11, so that negative pressure is generated inside the second compartment 13 to suck water into the second compartment 13. The first spring 1023 6 will always play the role of positioning the top plate 10235, preventing the top plate 10235 from moving toward the sampling port 10 and causing the water sample to be discharged. When the water sample in the second compartment 13 is collected, the tube body 10231 needs to re-enter the fixed box 1021. By providing a buckle assembly 15 at one end of the outer tube 931 adjacent to the control board 14, when the outer tube 931 contacts the control board 14, the buckle assembly 15 clamps the column, so that the outer tube 931 and the control board 14 components are connected. When the outer tube 931 returns, the buckle assembly 15 can drive the tube body 10231 to move toward the plug hole 7 so that the sampling port 10 of the tube body 10231 enters the fixed box 1021.

[0043] Specifically, the buckle assembly 15 includes a plug-in block 151, a plug-in ball 152, a plug-in slot 153 and a through hole 154, wherein the plug-in block 151 is fixedly arranged on the outer wall of one end of the control board 14 facing the through hole 154, and the plug-in ball 152 is fixedly arranged at one end of the plug-in block 151, the plug-in slot 153 and the through hole 154 are opened at one end of the outer tube 931, and the plug-in slot 153 is connected to the outside through the through hole 154, the plug-in ball 152 is plugged and matched with the plug-in slot 153, and the plug-in block 151 is plugged and matched with the through hole 154, and the maximum outer diameter of the plug-in ball 152 is greater than the inner diameter of the through hole 154, and the plug-in ball 152 is connected to the through hole 154. 52 is made of elastic material, so that when the outer tube 931 contacts the control board 14, the plug-in ball 152 will pass through the through hole 154 and be plugged into the inside of the plug-in slot 153. Since the plug-in ball 152 is made of elastic material, the plug-in ball 152 will be squeezed and deformed when inserted into the inside of the through hole 154. When the plug-in ball 152 is inserted into the inside of the plug-in slot 153, the plug-in ball 152 will expand and reset, so that the plug-in ball 152 cannot be separated from the plug-in slot 153 without a large external force. When the second push rod 93 is reset, the outer tube 931 moves toward the electric push rod 934. Due to the tube body 10231 One end of the tube body 10231 is tapered, and the smaller end passes through the gap between the two air bags from the inside of the fixed box 1021 to the outside. Therefore, when the smaller end needs to be reset, it needs less external force to enter the inside of the fixed box 1021 from the outside, and the squeezing force of the two air bags will also make it smoother for the tapered end of the tube body 10231 to return to the inside of the fixed box 1021. Therefore, when the tapered end of the tube body 10231 needs to move toward the inside of the fixed box 1021, the outer tube 931 can pull the tube body 10231 into the fixed box 1021 through the cooperation of the plug ball 152 and the plug groove 153 during the reset movement. When the tube body 10231 enters the interior of the fixed box 1021, the control board 14 at one end of the tube body 10231 contacts the inner wall of the fixed box 1021 to limit the tube body 10231, so that the tube body 10231 cannot continue to move with the outer tube 931. Therefore, at this time, the outer tube 931 continues to move under the drive of the electric push rod 934, which will separate the plug ball 152 and the plug slot 153, so that the outer tube 931 is separated from the control board 14, so that after the water sample is collected, the sampling port 10 of the tube body 10231 can enter the interior of the fixed box 1021 as the outer tube 931 is reset;

[0044] It should be noted that, in order to limit the position of the tube body 10231 when it is inserted into the sleeve 1022, a limiting strip 23 is provided on the outer wall of the tube body 10231, and a limiting groove 22 is provided on the inner wall of the sleeve 1022. The limiting strip 23 and the limiting groove 22 are slidably plugged in cooperation, so that the tube body 10231 is limited by the cooperation of the limiting strip 23 and the limiting groove 22.

[0045] When sampling groundwater, in order to better connect the water quality of an area, sampling is generally carried out at multiple locations and multiple depths. In order to avoid mutual contamination of water samples collected at various locations and depths, a switching component 16 is provided inside the fixed box 1021. The sampling tube 1023 is automatically switched by the switching component 16, so that when collecting water samples at different depths and different locations, the sampling tube 1023 can be automatically switched. Specifically, the switching component 16 includes a gear 161, a chain 162 and a conveyor belt 163, wherein two gears 161 are provided, and the two gears 161 are respectively provided inside the fixed box 1021, and the two gears 161 are arranged up and down, and a rotating shaft 164 is fixedly provided at each of the two gears 161, and the two ends of the rotating shaft 164 are rotatably connected to the inner wall of the fixed box 1021 through bearings, and the outer walls of the two gears 161 are meshed with a chain 162, and the outer wall of the chain 162 is fixedly provided with a conveyor belt. 163, and the sleeve 1022 is fixedly set on the outer wall of the conveyor belt 163, and a plurality of sleeves 1022 are provided, and the plurality of sleeves 1022 are arranged at equal intervals on the outer wall of the conveyor belt 163, so that the plurality of sampling tubes 1023 can be respectively inserted into the interior of each sleeve 1022. It should be noted that the two ends of the tube body 10231 of the sampling tube 1023 are respectively fitted and slidably matched with the outer walls of the two sides of the fixed box 1021, so that the tube body 10231 is limited by the fixed box 1021. In addition, the rotation of the gear 161 is driven by the driving motor 17. Specifically, one end of the rotating shaft 164 of the gear 161 extends to the outside of the fixed box 1021 and is located inside the cylinder 101, and the driving motor 17 is installed on the lower bottom plate 1011, and the driving motor 17 is connected to the rotating shaft 164 in a transmission manner. In addition, the driving motor 17 is a stepping motor, so that the rotation angle of the gear 161 can be controlled to achieve the purpose of switching the sampling tube 1023.

[0046] In order to make the switching of the sampling tube 1023 more automatic, a sensing plate 18 is fixedly provided at the front end of the fixed plate 91, and a sensor 19 is provided on one side of the sensing plate 18, and the sensor 19 is fixedly installed above the lower bottom plate 1011 through a mounting frame 20. In addition, a controller is also provided, and the controller is installed at the automatic winding machine 6. The sensor 19, the drive motor 17 and the electric push rod 934 are all electrically connected to the controller. It should be noted that the connecting wire can be set inside the sling 5 or outside the sling 5. After completing a water sampling, the telescopic shaft of the electric push rod 934 is reset to drive the fixed plate 91 to reset, and the fixed plate 91 resets and touches the sensor 19, thereby passing the sensor 19. The signal sent causes the drive motor 17 to rotate an angle, thereby switching the sampling tube 1023 so that the sampling tube 1023 at other positions is moved to the plug-in hole 7 for sampling. It should be noted that the sensor 19 is a proximity sensor 19. In addition, the position of the sensor 19 is configured so that when the plug-in ball 152 at one end of the outer tube 931 is separated from the plug-in slot 153, the fixed plate 91 moves and contacts the sensor 19 to send a signal to rotate the gear 161 through the control motor. In other words, after the sampling port 10 at one end of the tube body 10231 enters the interior of the fixed box 1021, the sensing plate 18 contacts the sensor 19 to control the sampling tube 1023 to switch.

[0047] The principle of the present invention is as follows: when the present invention is used, the device is moved to the sampling point, and then the sampling tube 1 is lowered underwater by the automatic winding machine 6. When the sampling tube 1 is lowered to the specified underwater depth, the electric push rod 934 is turned on, so that the electric push rod 934 drives the push rod assembly 9 to move horizontally, so that the push rod assembly 9 passes through the plug hole 7 and pushes the sampling tube 1023 inside the fixed box 1021. First, the second push rod 93 and the first push rod 92 pass through the plug hole 7 and enter the fixed box 1021. Then the second push rod 93 will contact the control board 14, and the outer tube 931 and the control board 14 are connected by the buckle assembly 15. The continuous horizontal movement of the second push rod 93 will cause the control board 14 to move horizontally and push the tube body 10231, so that the conical sampling port 10 at one end of the tube body 10231 passes through the gap between the air bags and enters the water, and then the first push rod 92 enters the tube body 10231 through the plug hole 11 to push the top plate 10235 pushes, so that the piston 10233 discharges the internal gas of the second compartment 13, and then the electric push rod 934 is reset, and the first push rod 92 is reset. Through the action of the first spring 10236, the pumping rod 10234 drives the piston 10233 to move toward the direction of the socket 11. The movement of the piston 10233 will cause a negative pressure to be generated inside the second compartment 13, so that the water sample can be sucked into the second compartment 13, and the water sampling is completed. After that, when the second push rod 93 is reset, the tube body 10231 will be moved through the buckle assembly 15, so that the sampling port 10 enters the fixed box 1021. After that, after the sampling port 10 enters the fixed box 1021, the sensing plate 18 contacts the sensor 19 as the fixed plate 91 moves, so that the sensor 19 sends a signal to control the drive motor 17 to rotate an angle to switch the sampling tube 1023, so that the other sampling tubes 1023 rotate to the socket hole 7 to continue the next sampling.

[0048] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A sampling device for groundwater microbial detection, comprising a sampling tube (1), characterized in that: The outer wall of the sampling cylinder (1) is provided with a water inlet (2), and the opening and closing of the water inlet (2) is controlled by a driving assembly (3); a hook (4) is fixedly provided at the center of the top end of the sampling cylinder (1), and a sling (5) is fixedly provided at the hook (4); the sampling cylinder (1) comprises a cylinder body (101) and a sampling assembly (102); the cylinder body (101) comprises a lower bottom plate (1011) and an upper outer cover (1012) installed above; the driving assembly (3) is installed above the lower bottom plate (1011); and the sampling assembly (102) is installed on one side above the lower bottom plate (1011) and located on one side of the driving assembly (3); The sampling assembly (102) comprises a fixed box (1021), a sleeve (1022), a sampling tube (1023) and a communication hole (1024); the fixed box (1021) is fixedly arranged on the upper end surface of the lower base plate (1011); the sleeve (1022) is arranged inside the fixed box (1021); a plurality of sleeves (1022) are arranged; each sleeve (1022) is plugged with a sampling tube (1023); a communication hole (1024) is provided on an outer wall of one side of the fixed box (1021); the communication hole (1024) is concentric with and communicates with the water inlet (2); a sampling port (10) is provided at one end of the sampling tube (1023); The sampling port (10) faces the connecting hole (1024); a switching assembly (16) for moving and switching the sampling tube (1023) is arranged inside the fixing box (1021); a plug hole (7) is arranged at a position of the outer wall on the other side of the fixing box (1021) corresponding to the connecting hole (1024); the plug hole (7) is concentric with the connecting hole (1024); the driving assembly (3) is configured to push the sampling tube (1023) inside the fixing box (1021) toward the connecting hole (1024); the inner walls of the connecting hole (1024) and the water inlet (2) are both provided with sealing fillers (8); and a protruding opening is arranged at the center of the sealing filler (8); The switching assembly (16) comprises a gear (161), a chain (162) and a conveyor belt (163); two gears (161) are provided, and the two gears (161) are respectively arranged inside the fixed box (1021); a rotating shaft (164) is fixedly arranged at each gear (161), and two ends of the rotating shaft (164) are respectively rotatably connected to the inner wall of the fixed box (1021); a chain (162) is meshedly arranged on the outer wall of the gear (161); a conveyor belt (163) is fixedly arranged on the outer wall of the chain (162); the sleeve (1022) is fixedly arranged on the outer wall of the conveyor belt (163); the sleeves (1022) on the outer wall of the conveyor belt (163) are arranged at equal intervals on the outer wall of the conveyor belt (163); and the rotation of the gear (161) is driven by a driving motor (17); The driving assembly (3) is configured as an electric push rod (934), and a push rod assembly (9) is fixedly provided at the extended shaft of the electric push rod (934); the sampling tube (1023) is provided with a cone at one end with an opening, and the tip thereof faces the connecting hole (1024); a side panel of the fixing box (1021) is configured to be detachably connected; and the sealing filler (8) is configured to be composed of two tightly fitting air bags; The sampling tube (1023) is configured to include a tube body (10231), a partition (10232), a piston (10233), a pumping rod (10234), a top plate (10235) and a first spring (10236); one end of the tube body (10231) is configured to be conical, the sampling port (10) is provided at the end of the cone, the other end of the tube body (10231) is provided with a plug hole (11), the interior of the tube body (10231) is fixedly provided with a partition (10232), and the inner cavity of the tube body (10231) is divided into a first compartment (11) by the partition (10232). 2) and a second compartment (13), wherein a piston (10233) is disposed inside the second compartment (13), a draw rod (10234) is fixedly disposed at one end of the piston (10233) close to the insertion hole (11), and the other end of the draw rod (10234) passes through the partition plate (10232) and extends to the first compartment (12), a top plate (10235) is fixedly disposed at one end of the draw rod (10234) located in the first compartment (12), and a first spring (10236) is disposed between the top plate (10235) and the partition plate (10232) and is sleeved on the outside of the draw rod (10234); The push rod assembly (9) is configured to include a fixing plate (91), a first push rod (92) and a second push rod (93); the fixing plate (91) is fixedly arranged at one end of the telescopic shaft of the electric push rod (934); the first push rod (92) is fixedly arranged on a side of the fixing plate (91) facing the plug hole (11); the first push rod (92), the plug hole (7) and the plug hole (11) are concentric; the second push rod (93) is fixedly arranged on the outer wall of the fixing plate (91); a control plate (14) is fixedly sleeved on the outer wall of one end of the tube body (10231) facing the plug hole (11); the outer diameter of the control plate (14) is larger than the inner diameter of the plug hole (7); the length of the second push rod (93) is longer than that of the first push rod (92); the second push rod (93) includes an outer tube (9 31), a second spring (932), a pressure plate (933) and a push rod (934), wherein a pressure plate (933) is arranged on one side of the interior of the outer tube (931), and the outer wall of the pressure plate (933) is slidably matched with the inner wall of the outer tube (931), a second spring (932) is arranged between the pressure plate (933) and the inner wall of the other end of the outer tube (931), a push rod (934) is also fixedly arranged on the outer wall of the pressure plate (933), and one end of the push rod (934) slides through the outer wall of one end of the outer tube (931) and extends to the outside of the outer tube (931), one end of the push rod (934) located outside the outer tube (931) is fixedly connected to the fixing plate (91), and one end of the outer tube (931) adjacent to the control plate (14) is provided with a buckle assembly (15); The buckle assembly (15) comprises a plug-in block (151), a plug-in ball (152), a plug-in slot (153) and a through hole (154); the plug-in block (151) is fixedly arranged on an outer wall of one end of the control board (14) facing the through hole (154); the plug-in ball (152) is fixedly arranged on one end of the plug-in block (151); the plug-in slot (153) and the through hole (154) are arranged at one end of the outer tube (931); the plug-in slot (153) is connected to the outside through the through hole (154); the plug-in ball (152) is plugged in with the plug-in slot (153); the plug-in block (151) is plugged in with the through hole (154); the maximum outer diameter of the plug-in ball (152) is greater than the inner diameter of the through hole (154); and the plug-in ball (152) is made of elastic material.

2. A sampling device for groundwater microbial detection as claimed in claim 1, characterized in that: The outer wall of the tube body (10231) is provided with a limit strip (23), the inner wall of the sleeve (1022) is provided with a limit groove (22), and the limit strip (23) and the limit groove (22) are slidably plugged into each other.

3. A sampling device for groundwater microbial detection as claimed in claim 1, characterized in that: The sling (5) is wound by an automatic winding machine (6), and a conical counterweight cone (21) is arranged below the sling (5), with the tip of the conical counterweight cone (21) facing downward.

4. A sampling device for groundwater microbial detection as claimed in claim 1, characterized in that: An induction plate (18) is fixedly disposed on the outer wall of the fixed plate (91), a sensor (19) is disposed on one side of the induction plate (18), and the sensor (19) is fixedly mounted above the lower base plate (1011) via a mounting frame (20), and the sensor (19), the drive motor (17) and the electric push rod (934) are all electrically connected to each other.

Images