A groundwater sample collecting device and method for engineering geological survey

Abstract

The application belongs to the technical field of groundwater sampling devices, and discloses a groundwater sample collecting device and method for engineering geological survey, which comprises a sampling head and a sampling rod, and the sampling head is arranged at one end of the sampling rod; the sampling rod comprises an outer pipe body and an inner pipe body, a positive pressure connection inlet is arranged on the side wall of the outer pipe body away from the sampling head, an air outlet is arranged at one end of the outer pipe body close to the sampling head, a first air channel is arranged on the outer pipe body, and the positive pressure connection inlet is communicated with the air outlet through the first air channel; a negative pressure connection inlet is arranged at one end of the inner pipe body away from the sampling head, at least one sampling port is arranged on the sampling head, and the negative pressure connection inlet is communicated with the sampling port; the sampling head is further provided with a second air channel and a blowing port, the blowing port is arranged close to the corresponding sampling port, and the blowing port is communicated with the first air channel through the second air channel and the air outlet; a filter screen is arranged on the sampling port; compared with the prior art, the device has a better anti-silt blocking effect.

Description

Technical Field

[0001] This application belongs to the field of groundwater sampling devices, and in particular relates to a groundwater sampling device and method for engineering geological exploration. Background Technology

[0002] With the advancement of groundwater extraction technology, the amount of groundwater resources being developed and utilized is gradually increasing. In order to improve the safety of residents' water use, it is necessary to use groundwater sampling devices to sample groundwater and to conduct laboratory analysis on the collected samples to determine whether trace elements, heavy metals, etc. in the groundwater exceed the standards.

[0003] Existing groundwater sampling devices include a support frame and a sampling device. The sampling device can slide up and down along the support frame. Most sampling devices include a survey drill bit and a survey rod. The survey drill bit is connected to the survey rod, and the end of the survey rod is connected to a negative pressure to extract groundwater samples when the sampling device extends into the groundwater layer. Due to the structural characteristics of the survey drill bit, the sampling device carries sediment when it draws in groundwater samples, which blocks the channels inside the survey rod, causing the entire sampling device to be unable to sample due to blockage. A small number of sampling devices also have filters or filter cartridges installed in the survey drill bit or survey rod. However, when the filter or filter cartridge accumulates sediment to a certain extent, it will still cause the entire sampling device to be blocked and unable to sample.

[0004] Therefore, existing groundwater sampling devices are prone to clogging by sediment. Summary of the Invention

[0005] This application provides a groundwater sampling device and method for engineering geological exploration, which solves the problem that existing groundwater sampling devices are easily blocked by silt.

[0006] The first objective of this invention is achieved by the following technical solution:

[0007] A groundwater sampling device for engineering geological exploration includes a sampling head and a sampling rod. The sampling head is disposed at one end of the sampling rod. The sampling rod includes an outer tube and an inner tube. A positive pressure inlet is provided on the side wall of the outer tube away from the sampling head, and an air outlet is provided at the end of the outer tube near the sampling head. A first air passage is provided in the outer tube, and the positive pressure inlet is connected to the air outlet through the first air passage. A negative pressure inlet is provided at the end of the inner tube away from the sampling head. The sampling head has at least one sampling port, and the negative pressure inlet is connected to the sampling port. The sampling head also has a second air passage and an air blowing port. The air blowing port is disposed near the corresponding sampling port, and the air blowing port is connected to the first air passage through the second air passage and the air outlet. A filter screen is provided on the sampling port.

[0008] Through the above technical solution, when the sampling head is inserted into the groundwater layer, the inner tube provides negative pressure to the sampling head. Groundwater flows into the sampling head through the sampling port and is drawn into the inner tube to achieve the sampling effect. During the absorption of groundwater, the filter screen removes the silt and sand in the groundwater. When the silt and sand accumulate and clump on the filter screen, the outer tube pumps in compressed air through the positive pressure inlet. The compressed air flows through the first and second air channels and is blown out from the air outlet, dispersing the clumps of silt and sand, thereby clearing the sampling port and allowing groundwater to flow smoothly into the sampling head. This solves the problem that existing groundwater sampling devices are easily clogged by silt and sand.

[0009] This application is further configured such that: the inner tube is rotatably connected to the outer tube, and a rotating connector is provided at the end of the inner tube away from the sampling head; the rotating connector is connected to a flow meter for cooperating with the groundwater sampling device for engineering geological exploration; and the flow meter is connected to a water pump for providing negative pressure.

[0010] With the above technical solution, when groundwater is extracted from the device of this application, the groundwater flows through the flow meter to measure the flow rate of the extracted groundwater, so that the staff can understand in time whether the device of this application is blocked; the rotating connector can drive the inner tube to rotate relative to the outer tube, and the inner tube rotates during the rotation, causing the sampling head to rotate, so that the mud and sand attached to the filter screen are thrown out, thereby further solving the problem that the existing groundwater sampling device is easily blocked by mud and sand.

[0011] This application is further configured to include a lifting drive, a lifting slide rail, and a lifting sliding member, wherein the lifting sliding member is slidably connected to the lifting slide rail, the outer tube passes through and is fixedly connected to the lifting sliding member, and the lifting end of the lifting drive passes through the lifting slide rail and is drivenly connected to the lifting sliding member.

[0012] Through the above technical solution, the lifting sliding component is slidably connected to the lifting slide rail, enabling the lifting sliding component to move along the direction of the lifting slide rail; the outer pipe body passes through and is fixedly connected to the lifting sliding component to fix the outer pipe body, and the lifting sliding component drives the outer pipe body to move up and down during the movement; the lifting end of the lifting drive component passes through the lifting slide rail and is drivenly connected to the lifting sliding component, and when the lifting drive component is working, it can drive the outer pipe to automatically rise and fall along the direction of the lifting slide rail to adjust the height of groundwater extraction.

[0013] This application is further configured to include a horizontal drive component and a transverse horizontal slide rail, wherein the horizontal drive component is slidably connected to the transverse horizontal slide rail, the main body of the lifting drive component is fixedly connected to the top of the housing of the horizontal drive component, and the lifting slide rail is fixedly connected to the side wall of the housing of the horizontal drive component.

[0014] With the above technical solution, when the horizontal drive component is working, it can drive the lifting drive component and the lifting slide rail to move horizontally along the transverse horizontal slide rail. At this time, the sampling head and the sampling rod also move horizontally along the transverse horizontal slide rail to adjust the horizontal position of the sampling head to absorb groundwater.

[0015] The second objective of this application is achieved by the following technical solution:

[0016] A method for collecting groundwater samples for engineering geological exploration, applied to the aforementioned groundwater sampling device for engineering geological exploration, comprising:

[0017] Obtain the initial flow signal;

[0018] Based on the initial flow signal, a negative pressure regulation signal is sent to the water pump used to provide negative pressure;

[0019] After the water pump completes the negative pressure adjustment, the current flow rate of the flow meter is used as the first flow signal;

[0020] Based on the first flow rate signal, a positive pressure regulation signal is sent to the air pump used to provide positive pressure.

[0021] Through the above technical solution, when the device of this application starts to absorb groundwater, it first acquires an initial flow signal as a basis for determining the amount of negative pressure required to extract the groundwater. Then, based on the initial flow signal, it sends a negative pressure adjustment signal to the water pump that provides negative pressure to increase the negative pressure so that the groundwater can be smoothly extracted from the groundwater layer to the surface. After the water pump completes the negative pressure adjustment, it acquires the flow signal of the flow meter again as the first flow signal. Based on the first flow signal, it determines whether the sampling port is blocked. If the first flow signal is lower than the predetermined flow signal while the negative pressure is maintained, it indicates that the filter screen on the sampling port has been blocked by silt. A positive pressure adjustment signal is then sent to the air pump to provide compressed air to the first air channel to blow away the silt attached to the filter screen, thereby solving the problem that existing groundwater sampling devices are easily blocked by silt.

[0022] This application further specifies that, based on the initial flow signal, sending a negative pressure regulation signal to the water pump used to provide negative pressure includes:

[0023] If the initial flow rate signal is lower than the predetermined flow rate signal, a negative pressure increase signal is sent to the water pump used to provide negative pressure.

[0024] If the initial flow signal is higher than or equal to the predetermined flow signal, a negative pressure maintenance signal is sent to the water pump used to provide negative pressure.

[0025] The negative pressure regulation signal includes the negative pressure increase signal and the negative pressure maintenance signal.

[0026] With the above technical solution, when the initial flow signal is lower than the predetermined flow signal, it indicates that the negative pressure provided by the water pump is insufficient to pump the groundwater to the surface. At this time, a negative pressure increase signal is sent to the water pump so that the groundwater can be pumped out. When the initial flow signal is greater than or equal to the predetermined flow signal, a negative pressure maintenance signal is sent to the water pump so that the water pump continuously provides negative pressure to the inner pipe body so that the groundwater can be continuously pumped out from the groundwater layer.

[0027] This application further specifies that, before acquiring the initial flow signal, the method includes:

[0028] Obtain information on groundwater distribution and sampling head location;

[0029] Based on the groundwater distribution information and the sampling head location information, a horizontal adjustment signal is sent to the horizontal drive component;

[0030] After the horizontal drive component completes the horizontal adjustment, it sends a lifting adjustment signal and a rotation signal to the lifting drive component and the rotating connecting component, respectively.

[0031] The above technical solution obtains groundwater distribution information to confirm the specific location of the groundwater layer. Based on the groundwater distribution information and the sampling head position information, a horizontal adjustment signal is sent to the horizontal drive component to adjust the horizontal position of the sampling head and make it coincide with the horizontal position of the groundwater layer. After the horizontal drive component completes the horizontal adjustment, a lifting adjustment signal is sent to the lifting drive component, and at the same time, a rotation signal is sent to the rotating connector. This allows the sampling head to maintain a rotating state during its descent to the groundwater layer height and drill through the soil above the groundwater layer, thereby achieving the effect of automatic positioning of the sampling head.

[0032] This application is further configured such that, after issuing a positive pressure regulating signal to the air pump used to provide positive pressure based on the first flow signal, the method includes:

[0033] After the air pump completes the positive pressure adjustment, the current flow signal of the flow meter is used as the second flow signal;

[0034] If the second flow signal is lower than the predetermined flow signal, a rotation signal is sent to the rotating connector;

[0035] After the rotating connector drives the inner tube to rotate, the current flow signal of the flow meter is used as the third flow signal;

[0036] If the third flow signal is lower than the predetermined flow signal, a reset signal is sent to the lifting drive and the horizontal drive.

[0037] Through the above technical solution, after the air pump completes the positive pressure adjustment, the flow signal of the flow meter is acquired again and used as the second flow signal. If the second flow signal is lower than the predetermined flow signal, it indicates that there is still sediment adhering to the filter screen. A rotation signal is sent to the rotating connector to make the sampling head rotate and throw out the sediment adhering to the filter screen. In addition, during the rotation of the sampling head, the smoothness of air supply from the first air channel to the second air channel is enhanced. If the flow signal of the flow meter acquired after all the above adjustment methods is still lower than the predetermined flow signal, it indicates that the inner tube is damaged and leaking air or the sampling head is damaged and needs to be replaced. A reset signal is sent to the lifting drive and the horizontal drive to make the sampling head and sampling rod rise to the ground, thereby facilitating the maintenance of the sampling head and sampling rod by the staff.

[0038] The third objective of this invention is achieved by the following technical solution:

[0039] A computer device includes a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the aforementioned method for collecting groundwater samples for engineering geological exploration.

[0040] The fourth objective of this invention is achieved by the following technical solution:

[0041] A computer-readable storage medium storing a computer program that, when executed by a processor, implements the aforementioned groundwater sampling device for engineering geological exploration.

[0042] In summary, this application includes at least one of the following beneficial technical effects:

[0043] 1. Compared with existing technologies, when sediment accumulates and clumps on the filter screen, compressed air is pumped into the outer tube through the positive pressure inlet. The compressed air flows through the first and second air channels and is blown out from the air outlet, dispersing the clumps of sediment. This achieves the effect of clearing the sampling port, allowing groundwater to flow smoothly into the sampling head, thus solving the problem that existing groundwater sampling devices are easily blocked by sediment.

[0044] 2. Compared with the prior art, when groundwater is extracted from the device of this application, the groundwater flows through the flow meter to measure the flow rate of the extracted groundwater, which makes it easier for staff to know in a timely manner whether the device of this application is blocked; the rotating connector can drive the inner tube to rotate relative to the outer tube, and the inner tube rotates during the rotation, causing the sampling head to rotate, so that the mud and sand attached to the filter screen are thrown out, thereby further solving the problem that existing groundwater sampling devices are easily blocked by mud and sand.

[0045] 3. Compared with the prior art, when the device of this application starts to absorb groundwater, it first acquires an initial flow signal, determines whether the negative pressure for absorbing groundwater is insufficient based on the initial flow signal, and then sends a negative pressure adjustment signal to the water pump that provides negative pressure based on the initial flow signal to increase the negative pressure so that groundwater can be smoothly extracted from the groundwater layer to the surface. After the water pump completes the negative pressure adjustment, the flow signal of the flow meter is acquired again as the first flow signal. Based on the first flow signal, it is determined whether the sampling port is blocked. If the first flow signal is lower than the predetermined flow signal under the state of maintaining negative pressure, it means that the sampling port has been blocked by silt. A positive pressure adjustment signal is sent to the air pump to supply compressed air to the first air channel to blow away the silt attached to the filter screen, thereby solving the problem that existing groundwater sampling devices are easily blocked by silt. Attached Figure Description

[0046] Figure 1 This is a schematic diagram showing the connection between the outer tube, the inner tube, and the sampling head in Embodiment 1 of this application;

[0047] Figure 2 yes Figure 1 Enlarged view of section A;

[0048] Figure 3 This is a schematic diagram of the groundwater sampling device used for engineering geological exploration in Embodiment 1 of this application.

[0049] Figure 4 This is a flowchart of the groundwater sampling method for engineering geological exploration in Embodiment 2 of this application;

[0050] Figure 5 This is a flowchart of step S20 in the groundwater sampling method for engineering geological exploration in Embodiment 2 of this application;

[0051] Figure 6 This is a flowchart following step S40 in the groundwater sampling method for engineering geological exploration in Embodiment 2 of this application;

[0052] Figure 7 This is a schematic diagram of the computer device in Embodiment 3 of this application.

[0053] Explanation of reference numerals in the attached figures:

[0054] 1. Sampling head; 11. Sampling port; 12. Second air passage; 13. Air blowing port; 14. Cone head; 15. Frustum; 16. Connector; 2. Sampling rod; 21. Outer tube; 211. Air outlet; 212. First air passage; 22. Inner tube; 221. Negative pressure inlet; 3. Filter screen; 4. Rotary connecting component; 5. Lifting drive component; 6. Lifting slide rail; 61. Lifting sliding component; 7. Horizontal drive component; 8. Transverse horizontal slide rail; 9. Bearing. Detailed Implementation

[0055] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0056] This application provides a groundwater sampling device and method for engineering geological exploration, which solves the problem that existing groundwater sampling devices are easily blocked by silt.

[0057] Example 1

[0058] like Figure 1 and Figure 2 As shown in the figure, an embodiment of this application provides a groundwater sampling device for engineering geological exploration, including a sampling head 1 and a sampling rod 2. The sampling head 1 is disposed at one end of the sampling rod 2, and the sampling head 1 has at least one sampling port 11 to allow groundwater to flow into the sampling head 1 through the sampling port 11. The sampling rod 2 is composed of an outer tube 21 and an inner tube 22. The outer tube 21 has a positive pressure inlet on its side wall away from the sampling head 1 for connecting to an air pump that provides positive pressure, and an air outlet 211 is provided at the end of the outer tube 21 near the sampling head 1. A first air passage 212 is provided in the tube wall of the outer tube 21, and the positive pressure inlet is connected to the air outlet 211 through the first air passage 212 to blow compressed air provided by the air pump out from the air outlet 211. The top of the sampling head 1 is provided with a frustum 15, and the frustum 15 has a second air passage 12 and an air blowing port 13, with the air blowing port 13 near the sampling port 11. The system is configured such that the air inlet 13 is connected to the air outlet 211 via the second air passage 12, so that when compressed air is input into the positive pressure inlet, the air inlet 13 blows compressed air toward the sampling port 11, thereby dispersing the mud and sand; the inner tube 22 has a negative pressure inlet 221 at the end away from the sampling head 1, and the negative pressure inlet 221 is connected to the sampling port 11, so that when the negative pressure inlet 221 is connected to the negative pressure water pump, the groundwater is pumped to the ground; each sampling port 11 is equipped with a filter screen 3 to filter out the mud and sand in the groundwater; compared with the prior art, when the mud and sand accumulate and clump on the filter screen 3, the outer tube 21 pumps in compressed air through the positive pressure inlet, so that the compressed space flows through the first air passage 212 and the second air passage 12 and blows out from the air inlet 13, dispersing the clumped mud and sand, so that the sampling head 1 can smoothly draw in groundwater, thereby solving the problem that the existing groundwater is easily blocked by mud and sand.

[0059] Preferably, the outer diameter of the frustum portion 15 is greater than or equal to the outer diameter of the outer tube 21 to improve airtightness.

[0060] like Figure 1 and Figure 2As shown, in this embodiment, the device further includes a bearing 9. The inner tube 22 is rotatably connected to the outer tube 21 via the bearing 9, allowing the inner tube 22 to rotate relative to the outer tube 21. During the rotation of the inner tube 22 relative to the outer tube 21, the first air passage 212 and the second air passage 12 remain connected, reducing the possibility of blockage of the first air passage 212 and the second air passage 12 due to assembly errors of the sampling head 1, thus ensuring that the blowing port 13 can always blow out compressed air. In this embodiment, the top of the sampling head 1 is provided with... A connector 16 is provided with an external thread, while the inner tube 22 has an internal thread. The connector 16 is threaded to the inner tube 22, so that the inner tube 22 can drive the sampling head 1 to rotate relative to the outer tube 21. During the rotation of the inner tube 22, the sampling head 1 throws out the mud and sand attached to the filter screen 3, thereby further solving the problem that existing groundwater sampling devices are easily blocked by mud and sand. In this embodiment, a cone 14 is provided at the bottom of the sampling head 1, which is conducive to the sampling head 1 penetrating the soil above the groundwater layer.

[0061] like Figure 3 As shown, the device of this application also includes a lifting drive 5, a lifting slide rail 6, and a lifting sliding member 61. The lifting sliding member 61 is slidably connected to the lifting slide rail 6, so that the lifting sliding member 61 can move along the direction of the lifting slide rail 6. In this embodiment, there are two lifting sliding members 61. The outer tube 21 passes through and is fixedly connected to the two lifting sliding members 61, so that the lifting sliding member 61 can smoothly drive the outer tube 21 to move along the direction of the lifting slide rail 6. In this embodiment, the lifting drive 5 is a hydraulic cylinder with high load-bearing capacity and long extension stroke. The lifting end of the lifting drive 5 passes through the opening in the middle of the lifting slide rail 6 and is connected to the lifting sliding member 61. When the lifting drive 5 drives its extension end to extend or retract, it drives the sampling head 1 and the sampling rod 2 to automatically perform lifting and lowering actions, thereby adjusting the height at which the sampling head 1 absorbs groundwater.

[0062] like Figure 3As shown, the device of this application also includes a horizontal drive component 7 and a transverse horizontal slide rail 8. In this embodiment, the horizontal drive component 7 is a linear motor, which has a high load-bearing capacity and can achieve closed-loop control based on PID modulation technology. The horizontal drive component 7 is slidably connected to the transverse horizontal slide rail 8. The main body of the lifting drive component 5 is fixedly connected to the top of the outer shell of the horizontal drive component 7, and the lifting slide rail 6 is fixedly connected to the side wall of the outer shell of the horizontal drive component 7. When the horizontal drive component 7 moves along the transverse horizontal slide rail 8, it can drive the sampling head 1 and the sampling rod 2 to move along the transverse horizontal slide rail 8, thereby facilitating the adjustment of the horizontal position of the sampling head 1 in absorbing groundwater. Preferably, the device of this application also includes a longitudinal horizontal slide rail. The transverse horizontal slide rail 8 is slidably connected to the longitudinal horizontal slide rail, and a corresponding linear motor is provided on the longitudinal horizontal slide rail to drive the transverse horizontal slide rail 8 to slide along the direction of the longitudinal horizontal slide rail, thereby improving the degree of freedom of the sampling head 1 in the horizontal direction.

[0063] like Figure 1 and Figure 3 As shown, the device of this application also includes a rotating connector 4. The negative pressure inlet 221 of the inner tube 22 is connected to the rotating connector 4. In this embodiment, the rotating connector 4 is a fluid slip ring. Compared with the prior art, the device of this application overcomes the problem that the external negative pressure pipeline is easy to bend or entangle due to rotation, and improves the smoothness of groundwater absorption. The outlet end of the rotating connector 4 is connected to a flow meter that works with the device of this application. When groundwater is drawn out from the device of this application, the groundwater will flow through the flow meter to measure the flow rate of groundwater drawn out, so as to facilitate the staff to understand in time whether there is a blockage in the device of this application.

[0064] The operating method of the device in this application is as follows:

[0065] The staff first dug out a hole connecting to the groundwater layer, and then placed the device of this application on the hole;

[0066] Control the horizontal drive 7 to adjust the horizontal position of the sampling head 1 to be directly above the opening;

[0067] Control the lifting drive component 5 and the rotating connecting component 4 so that the sampling head 1 rotates and descends until it reaches the groundwater layer;

[0068] Turn on the water pump to draw groundwater into the inner pipe 22, and observe the changes in the flow meter at the same time;

[0069] If the flow meter reading is lower than the predetermined value, it indicates that the filter screen 3 on the sampling port 11 is clogged. Turn on the positive pressure air pump to blow away the soil accumulated on the filter screen 3 with compressed air, and at the same time increase the rotation speed to throw out the blown soil, thereby solving the problem that the existing groundwater sampling device is easily clogged by mud and sand.

[0070] Example 2

[0071] like Figure 4 As shown, this application discloses a groundwater sampling method for engineering geological exploration. Using the aforementioned groundwater sampling device for engineering geological exploration, the groundwater sampling method for engineering geological exploration according to this application includes:

[0072] S10: Obtain the initial flow signal.

[0073] In this embodiment, the initial flow signal refers to the flow measurement value of the flow meter before the sampling head is located in the groundwater layer and the negative pressure water pump is turned on.

[0074] Specifically, when the sampling head begins to absorb groundwater, the current flow rate of the flow meter is first obtained as the initial flow signal, so that staff or computer equipment can determine the amount of negative pressure needed to extract the groundwater.

[0075] Prior to step S10, the method of this application further includes:

[0076] Obtain information on groundwater distribution and sampling head location;

[0077] Based on groundwater distribution information and sampling head location information, a horizontal adjustment signal is sent to the horizontal drive component;

[0078] After the horizontal drive component completes the horizontal adjustment, it sends a lifting adjustment signal and a rotation signal to the lifting drive component and the rotating connecting component, respectively.

[0079] In this embodiment, the groundwater distribution information is obtained manually using existing ultrasonic detection technology. The groundwater distribution information includes the horizontal position coordinates and depth coordinates of the groundwater. The sampling head position information includes the horizontal position coordinates and height coordinates of the sampling head, which are obtained based on the specific positions of the horizontal drive component and the lifting drive component on the corresponding slide rails.

[0080] Specifically, groundwater distribution information is manually acquired and input into a computer to obtain the horizontal and depth coordinates of the groundwater layer. Then, the computer obtains the horizontal and height coordinates of the sampling head. First, a horizontal adjustment signal is sent to the horizontal drive component to adjust the position of the sampling head in the horizontal direction, so that the horizontal coordinates of the sampling head are similar to the horizontal coordinates of the groundwater layer. After the horizontal drive component completes the horizontal adjustment, lifting and lowering adjustment signals are sent to the lifting drive component and the rotating connecting component respectively, so that the sampling head rotates and descends at the same time, drilling through the soil above the groundwater layer until the sampling head stops descending when it reaches the groundwater layer, thus realizing the automatic positioning function of the sampling head.

[0081] S20: Based on the initial flow signal, send a negative pressure regulation signal to the water pump used to provide negative pressure.

[0082] Specifically, based on the initial flow signal, a negative pressure adjustment signal is sent to the water pump that provides negative pressure to increase the negative pressure, so that groundwater can be smoothly extracted from the groundwater layer to the surface.

[0083] like Figure 5 As shown, step S20 includes:

[0084] S21: If the initial flow signal is lower than the predetermined flow signal, send a negative pressure increase signal to the water pump used to provide negative pressure;

[0085] S22: If the initial flow signal is higher than or equal to the predetermined flow signal, send a negative pressure maintenance signal to the water pump used to provide negative pressure;

[0086] S23: The negative pressure regulation signal includes a negative pressure increase signal and a negative pressure maintenance signal.

[0087] In this embodiment, the predetermined flow rate signal is set according to the actual needs of the staff.

[0088] Specifically, when the initial flow rate signal is lower than the predetermined flow rate signal, the negative pressure provided by the pump is insufficient to extract groundwater to the surface. A negative pressure increase signal is sent to the pump to enable the groundwater to be extracted. When the initial flow rate signal is higher than or equal to the predetermined flow rate signal, it indicates that the negative pressure provided by the pump is sufficient to extract groundwater to the surface. A negative pressure maintenance signal is sent to the pump to ensure that the pump continues to provide negative pressure, thereby enabling the groundwater to be continuously extracted from the groundwater layer.

[0089] S30: After the water pump completes the negative pressure adjustment, the current flow rate of the flow meter is used as the first flow signal.

[0090] In this embodiment, after the water pump completes the negative pressure adjustment, a delay is required to wait for the negative pressure to stabilize before acquiring the current flow rate of the flow meter, in order to improve the accuracy of the acquired first flow rate signal.

[0091] Specifically, after the water pump completes the negative pressure adjustment, the flow signal of the flow meter is acquired again as the first flow signal, so that the staff or computer equipment can determine whether the filter screen 3 on the sampling port 11 is blocked based on the first flow signal.

[0092] S40: Based on the first flow signal, send a positive pressure regulation signal to the air pump used to provide positive pressure.

[0093] In this embodiment, after the above steps are completed, the water pump continuously provides negative pressure to the inner pipe.

[0094] Specifically, under the condition of maintaining negative pressure, if the first flow signal is lower than the first flow signal, the filter screen of the sampling port on the surface is blocked by mud and sand. A positive pressure adjustment signal is sent to the air pump, causing the air pump to pump compressed air into the first air channel. The compressed air blows towards the filter screen, thereby blowing away the mud and sand attached to the filter screen to achieve the effect of unblocking, so that groundwater can continue to be drawn in by the sampling head.

[0095] like Figure 6 As shown, after step S40, the method of this application further includes:

[0096] S41: After the air pump completes the positive pressure adjustment, use the current flow signal of the flow meter as the second flow signal;

[0097] S42: If the second flow signal is lower than the predetermined flow signal, send a rotation signal to the rotating connecting member;

[0098] S43: After the rotating connector drives the inner tube to rotate, the current flow signal of the flow meter is used as the third flow signal;

[0099] S44: If the third flow signal is lower than the predetermined flow signal, a reset signal is sent to the lifting drive and the horizontal drive.

[0100] Specifically, after the air pump completes positive pressure regulation, the current flow signal of the flow meter is acquired again and used as the second flow signal. If the second flow signal is still lower than the predetermined flow signal, it indicates that the air passages of the first and second air passages are not smooth or that the compressed air has not sufficiently dispersed the dirt attached to the filter screen. At this time, a rotation signal is sent to the rotating connector to make the inner tube body drive the sampling head 1 to rotate at high speed, so as to improve the smoothness of the first and second air passages and shake off the dirt on the filter screen. During the rotation of the sampling head, the current flow signal of the flow meter is acquired again and used as the third flow signal. If the third flow signal is still lower than the first predetermined flow signal, it indicates that the inner tube body is damaged and leaking air or the sampling head is damaged and needs to be replaced. At this time, a reset signal is sent to the lifting drive and the horizontal drive to make the sampling head rise first and then move horizontally back to the initial position, so as to facilitate the staff to repair or replace the parts of this device.

[0101] Example 3

[0102] like Figure 7 As shown, in this embodiment, a computer device includes a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, it performs the following steps:

[0103] Obtain the initial flow signal;

[0104] Based on the initial flow signal, a negative pressure regulation signal is sent to the water pump used to provide negative pressure;

[0105] After the water pump completes the negative pressure adjustment, the current flow rate of the flow meter is used as the first flow signal;

[0106] Based on the first flow signal, a positive pressure regulation signal is sent to the air pump used to provide positive pressure.

[0107] In this embodiment, a computer-readable storage medium is provided, which stores a computer program. When the computer program is executed, it performs the following steps:

[0108] Obtain the initial flow signal;

[0109] Based on the initial flow signal, a negative pressure regulation signal is sent to the water pump used to provide negative pressure;

[0110] After the water pump completes the negative pressure adjustment, the current flow rate of the flow meter is used as the first flow signal;

[0111] Based on the first flow signal, a positive pressure regulation signal is sent to the air pump used to provide positive pressure.

[0112] Those skilled in the art will understand that all or part of the processes in the methods of the above embodiments can be implemented by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer-readable storage medium. When executed, the computer program can include the processes of each of the embodiments described above. Any references to memory, storage, databases, or other media used in each embodiment provided in this application can include non-volatile and / or volatile memory. Non-volatile memory can include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM), or flash memory. Volatile memory can include random access memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in various forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), dual data rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), Synchlink, DRAM (SLDRAM), RAMbus direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and RAMbus dynamic RAM (RDRAM), etc.

[0113] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the above division of each functional unit and module is only used as an example. In actual applications, the above functions can be assigned to different functional units and modules as needed, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above.

[0114] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in each of the foregoing embodiments, or equivalent substitutions can be made to some of the features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of each embodiment of this application, and should all be included within the protection scope of this application.

Claims

1. A groundwater sampling device for engineering geological exploration, characterized in that, The device includes a sampling head (1) and a sampling rod (2). The sampling head (1) is located at one end of the sampling rod (2). The sampling rod (2) includes an outer tube (21) and an inner tube (22). The outer tube (21) has a positive pressure inlet on its side wall away from the sampling head (1). The outer tube (21) has an outlet (211) at its end near the sampling head (1). The outer tube (21) has a first air passage (212), and the positive pressure inlet is connected to the outlet (211) through the first air passage (212). The inner tube (22) has a negative pressure inlet (221) at its end away from the sampling head (1). The sampling head (1) has at least one sampling port (11). The negative pressure inlet (221) 221) Connect the sampling port (11); the sampling head (1) is also provided with a second air passage (12) and an air blowing port (13). The air blowing port (13) is set close to the corresponding sampling port (11). The air blowing port (13) is connected to the first air passage (212) through the second air passage (12) and the air outlet (211); a filter screen (3) is provided on the sampling port (11); the inner tube body (22) is rotatably connected to the outer tube body (21). A rotating connecting piece (4) is provided at the end of the inner tube body (22) away from the sampling head (1). The rotating connecting piece (4) is connected to a flow meter for cooperating with the groundwater sampling device for engineering geological exploration. The flow meter is connected to a water pump for providing negative pressure.

2. The groundwater sampling device for engineering geological exploration according to claim 1, characterized in that, It also includes a lifting drive (5), a lifting slide rail (6) and a lifting sliding member (61), wherein the lifting sliding member (61) is slidably connected to the lifting slide rail (6), the outer tube (21) passes through and is fixedly connected to the lifting sliding member (61), and the lifting end of the lifting drive (5) passes through the lifting slide rail (6) and is drivenly connected to the lifting sliding member (61).

3. The groundwater sampling device for engineering geological exploration according to claim 2, characterized in that, It also includes a horizontal drive (7) and a transverse horizontal slide rail (8), wherein the horizontal drive (7) is slidably connected to the transverse horizontal slide rail (8), the main body of the lifting drive (5) is fixedly connected to the top of the housing of the horizontal drive (7), and the lifting slide rail (6) is fixedly connected to the side wall of the housing of the horizontal drive (7).

4. A method for collecting groundwater samples for engineering geological exploration, characterized in that, The method of using the groundwater sampling device for engineering geological exploration as described in claim 3 includes: Obtain the initial flow signal; Based on the initial flow signal, a negative pressure regulation signal is sent to the water pump used to provide negative pressure; After the water pump completes the negative pressure adjustment, the current flow rate of the flow meter is used as the first flow signal; Based on the first flow rate signal, a positive pressure regulation signal is sent to the air pump used to provide positive pressure.

5. A method for collecting groundwater samples for engineering geological exploration according to claim 4, characterized in that, The step of sending a negative pressure regulation signal to the water pump used to provide negative pressure based on the initial flow signal includes: If the initial flow rate signal is lower than the predetermined flow rate signal, a negative pressure increase signal is sent to the water pump used to provide negative pressure. If the initial flow signal is higher than or equal to the predetermined flow signal, a negative pressure maintenance signal is sent to the water pump used to provide negative pressure. The negative pressure regulation signal includes the negative pressure increase signal and the negative pressure maintenance signal.

6. A method for collecting groundwater samples for engineering geological exploration according to claim 4, characterized in that, Before acquiring the initial flow signal, the method further includes: Obtain information on groundwater distribution and the location of the sampling head (1); Based on the groundwater distribution information and the sampling head (1) location information, a horizontal adjustment signal is sent to the horizontal drive (7); After the horizontal drive (7) completes the horizontal adjustment, it sends a lifting adjustment signal and a rotation signal to the lifting drive (5) and the rotating connecting member (4), respectively.

7. A method for collecting groundwater samples for engineering geological exploration according to claim 4, characterized in that, After issuing a positive pressure regulation signal to the air pump used to provide positive pressure based on the first flow rate signal, the method includes: After the air pump completes the positive pressure adjustment, the current flow signal of the flow meter is used as the second flow signal; If the second flow signal is lower than the predetermined flow signal, a rotation signal is sent to the rotating connector (4); After the rotating connector (4) drives the inner tube (22) to rotate, the current flow signal of the flow meter is used as the third flow signal; If the third flow signal is lower than the predetermined flow signal, a reset signal is sent to the lifting drive (5) and the horizontal drive (7).

8. A computer device, characterized in that, The method includes a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor, when executing the computer program, implements a groundwater sampling method for engineering geological exploration as described in any one of claims 4 to 7.

9. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program that, when executed by a processor, implements a groundwater sampling method for engineering geological exploration as described in any one of claims 4 to 7.

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