A groundwater well washing sampling device

Abstract

The present invention relates to the technical field of sampling equipment, and specifically to a groundwater well washing sampling equipment, comprising a sampling lifting rod, and also comprising: an upper bracket, the upper bracket is connected to the sampling lifting rod, and a connecting cylinder is fixedly installed on the upper bracket, and a lower bracket is fixedly installed on the bottom end of the connecting cylinder; and a sampling control mechanism, the sampling control mechanism is respectively connected to the sampling lifting rod, the upper bracket, the connecting cylinder and the lower bracket, wherein the control mechanism comprises a longitudinal control frame, a sampling branch pipe, a suction port, a lateral drive assembly and a position detection assembly; the groundwater well washing sampling equipment of the present invention can ensure that the collected groundwater samples are representative and accurate by scientifically and reasonably arranging the sampling heads, provide reliable data support for groundwater environmental protection and management, and improve the accuracy and efficiency of sampling.

Description

Technical Field

[0001] The invention relates to the technical field of sampling equipment, in particular to underground water well washing sampling equipment. Background Art

[0002] Groundwater well-washing sampling equipment is a key tool in the field of environmental protection and water resources management. With the increasing severity of groundwater pollution and the improvement of environmental protection awareness, this type of equipment plays an increasingly important role in groundwater environmental investigation, contaminated site remediation and water resources management. From early manual excavation and simple pumping equipment to modern equipment that integrates advanced technologies such as low-flow sampling, intelligent control and multi-parameter water quality monitoring, groundwater well-washing sampling technology has undergone significant changes. These devices not only improve the accuracy and efficiency of sampling, but also ensure the scientificity and reliability of groundwater environmental monitoring through standardized and normalized development.

[0003] The existing groundwater well washing sampling equipment has many factors that affect the accuracy of subsequent sampling data during the sampling stage, such as the sampling location, water level control, and sampling flow rate. Especially for irregularly shaped monitoring wells, by scientifically and reasonably arranging the sampling heads, it can be ensured that the collected groundwater samples are representative and accurate, providing reliable data support for groundwater environmental protection and management. Otherwise, it will affect the accuracy and efficiency of sampling. Therefore, in view of the above situation, it is urgent to develop a groundwater well washing sampling equipment to overcome the shortcomings in current practical applications. Summary of the invention

[0004] The object of the present invention is to provide a groundwater well washing sampling device to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A groundwater well washing sampling device comprises a sampling lifting rod and also includes:

[0007] An upper bracket, the upper bracket is connected to the sampling lifting rod, and a connecting cylinder is fixedly installed on the upper bracket, and a lower bracket is fixedly installed on the bottom end of the connecting cylinder;

[0008] and a sampling control mechanism, wherein the sampling control mechanism is respectively connected to the sampling lifting rod, the upper bracket, the connecting cylinder and the lower bracket, wherein the sampling control mechanism includes a longitudinal control frame, a sampling branch pipe, a suction port, a lateral shift drive assembly and a position detection assembly;

[0009] The lateral shift drive assembly is respectively connected to the sampling lifting rod, the upper bracket, the connecting cylinder and the lower bracket, and a longitudinal control frame is also installed on the lateral shift drive assembly. A sampling branch pipe and a suction port are provided on the longitudinal control frame. The sampling branch pipe is connected to the suction port. The position detection assembly is respectively connected to the lower bracket and the lateral shift drive assembly.

[0010] As a further solution of the present invention: the side shift drive assembly comprises:

[0011] A side shifting chute, wherein the number of the side shifting chute is multiple, the multiple side shifting chute are respectively opened on the upper bracket and the lower bracket, and each side shifting chute is provided with a reset slider;

[0012] A side-shift sampling rack, wherein the side-shift sampling rack is fixedly connected to the reset slider, wherein the longitudinal control rack is located inside the side-shift sampling rack, and a longitudinal slider is fixedly mounted on the longitudinal control rack, and the longitudinal slider is slidably connected to the side-shift sampling rack;

[0013] and a pneumatic unit, wherein the pneumatic unit is respectively connected to the sampling lifting rod, the upper bracket and the connecting cylinder, and is connected to the longitudinal control frame.

[0014] As a further solution of the present invention: the pneumatic unit comprises:

[0015] A flow distribution controller, the flow distribution controller is fixedly connected to the sampling lifting rod and the upper bracket respectively, and a charging and suction pipe 1 is also fixedly installed on the flow distribution controller;

[0016] A guide cylinder, the guide cylinder is located in the connecting cylinder and is connected to the flow distribution controller through a plurality of second delivery hoses, and a plurality of communication holes are also provided on the guide cylinder, and the plurality of communication holes are respectively connected to a plurality of second delivery hoses;

[0017] A displacement control cylinder, one end of which passes through the connecting cylinder and is fixedly connected to the guide cylinder, and the displacement control cylinder is also connected to the connecting hole;

[0018] And a telescopic rod, one end of which is inserted into the displacement control cylinder and slidably connected to the displacement control cylinder, and the other end of the telescopic rod is fixedly connected to the longitudinal control frame.

[0019] As a further solution of the present invention: it also includes: lifting notches, the number of which is equal to the number of the displacement control cylinders, and a plurality of the lifting notches are evenly arranged on the connecting cylinder;

[0020] And a telescopic cylinder, the telescopic cylinder is fixedly installed in the connecting cylinder, and the output end of the telescopic cylinder is also fixedly connected to the guiding cylinder.

[0021] As a further solution of the present invention: the position detection component includes:

[0022] Sampling point locator one, the number of the sampling point locator one is equal to the number of the side-shift sampling racks, and a plurality of the sampling point locators one are respectively fixedly mounted on a plurality of the side-shift sampling racks;

[0023] And a second sampling point locator, wherein the second sampling point locator is fixedly mounted on the lower bracket.

[0024] As a further solution of the present invention: it also includes: a sampling monitoring tube, which is fixedly mounted on the longitudinal control frame and electrically connected to the valve member provided on the sampling branch pipe;

[0025] and a monitoring component, wherein the monitoring component is respectively connected to the flow distribution controller, the upper bracket, the side-shift sampling rack and the sampling monitoring tube, wherein the monitoring component includes a buoyancy monitoring unit and a sampling monitoring unit;

[0026] The buoyancy monitoring unit is respectively connected to the flow distribution controller, the upper bracket and the side-shift sampling rack, and the sampling monitoring unit is connected to the sampling monitoring tube and to the buoyancy monitoring unit.

[0027] As a further solution of the present invention: the buoyancy monitoring unit comprises:

[0028] A guide chute plate, wherein the guide chute plate is fixedly connected to the side-shift sampling rack;

[0029] A sliding circular tube, the sliding circular tube is inserted into the guide slide plate and is slidably connected with the guide slide plate, and a limit arc rod and a deformable buoyancy member are also provided on the sliding circular tube, wherein the limit arc rod is in contact with the deformable buoyancy member, and the deformable buoyancy member is also connected with the sliding circular tube;

[0030] A water level detector, which is fixedly mounted on the side-shift sampling rack and is detachably connected to the limit arc rod;

[0031] and a buoyancy change module, wherein the buoyancy change module is respectively connected to the flow distribution controller, the upper bracket and the sliding circular tube.

[0032] As a further solution of the present invention: the buoyancy change module comprises:

[0033] A second air filling and suction pipe, wherein the second air filling and suction pipe is fixedly connected to the flow distribution controller;

[0034] An air hole is provided on the upper bracket and is connected to the second air filling and suction pipe;

[0035] And a conveying hose 1, one end of which is fixedly connected to the upper bracket and communicated with the air hole, and the other end of which is communicated with the sliding circular tube.

[0036] As a further solution of the present invention: the sampling monitoring unit includes:

[0037] A detection slide, the detection slide is fixedly installed in the sampling monitoring cylinder;

[0038] A supporting slide block, wherein the supporting slide block is slidably connected to the detection slide seat, and a gravity block is fixedly mounted on the supporting slide block;

[0039] A linkage member, one end of which is fixedly connected to the gravity block, and the other end of which passes through the sampling and monitoring tube and is fixedly connected to the deformation buoyancy member;

[0040] and a low-position detector, which is fixedly installed in the sampling monitoring tube and detachably connected to the gravity block, and is also electrically connected to a valve member provided on the sampling branch pipe.

[0041] As a further solution of the present invention: it also includes: a speed detector, which is distributed on the detection slide and slidably connected to the supporting slide, and the speed detector is also electrically connected to the valve member provided on the sampling branch pipe.

[0042] Compared with the prior art, the present invention has the following beneficial effects:

[0043] After the well washing is completed and the sampling stage begins, first, the sampling lifting rod can be connected to the external traction device to facilitate driving the entire sampling equipment to the designated position in the well for sampling, wherein the external traction device can use existing equipment, and then, after the connecting cylinder and the lower bracket are immersed in water, the height of the lower bracket from the bottom of the well can be detected through the action of the position detection component to avoid the suction port being too close to the bottom of the well, which affects the sampling accuracy. At this time, the lateral shift drive component is started, wherein the lateral shift drive component includes a plurality of drive components, and can drive the longitudinal control frames between the plurality of upper brackets and the lower bracket to move toward the outside direction of the sampling lifting rod to adjust the distance between the plurality of suction ports, so that the suction ports are dispersed at appropriate positions in the well. In addition, under the driving action of the plurality of drive components, the movement distances of the plurality of longitudinal control frames are the same or different, which can be adjusted according to the position detection component provided on the lateral shift drive component. Detection is performed so that each longitudinal control frame is at an appropriate width from the well wall, so that the position of each suction port can be adaptively adjusted according to the different structures in the well (when the structure in the well is circular, the moving distances of multiple longitudinal control frames are the same), so that multiple suction ports are in suitable positions for sampling operations. Under the action of the submersible pump suction (the submersible pump is the prior art), the liquid in the well enters the sampling branch pipe through the suction port, wherein, on the side-moving sampling frame, a channel is provided for the position between the sampling branch pipe and the suction port, and the liquid entering the sampling branch pipe finally flows into the sample bottle for the staff to subsequently test the samples and take the average value. No further details will be given here. The operation is simple, and by scientifically and reasonably arranging the sampling heads, it can be ensured that the collected groundwater samples are representative and accurate, providing reliable data support for groundwater environmental protection and management, improving the accuracy and efficiency of sampling, and providing convenience for the staff. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 It is a schematic diagram of the three-dimensional structure of the groundwater well washing sampling equipment in an embodiment of the present invention.

[0045] Figure 2 It is a schematic diagram of the three-dimensional structure of the distribution of the first and second air-intake and air-intake pipes in an embodiment of the present invention.

[0046] Figure 3 Schematic diagram of the three-dimensional structure of the sampling point locator 2 in the embodiment of the present invention.

[0047] Figure 4 It is a schematic diagram of the three-dimensional structure of the side shift slide in an embodiment of the present invention.

[0048] Figure 5 It is a schematic cross-sectional structure diagram of the connecting cylinder in an embodiment of the present invention.

[0049] Figure 6 It is a schematic diagram of the three-dimensional structure of the side-shift sampling rack in an embodiment of the present invention.

[0050] Figure 7 It is a schematic cross-sectional structural diagram of the displacement control cylinder in an embodiment of the present invention.

[0051] Figure 8 Schematic diagram of the three-dimensional structure of the longitudinal control frame in an embodiment of the present invention.

[0052] Fig. 9 Schematic diagram of the three-dimensional structure of the limiting arc rod in an embodiment of the present invention.

[0053] Fig.10 Schematic diagram of the three-dimensional structure of the deformable buoyancy member in an embodiment of the present invention.

[0054] Fig.11 It is a schematic diagram of the enlarged three-dimensional structure of the sampling and monitoring tube in the embodiment of the present invention.

[0055] Fig.12 It is a schematic cross-sectional structural diagram of a sampling monitoring tube in an embodiment of the present invention.

[0056] In the figure: 1-sampling lifting rod, 2-flow distribution controller, 3-upper bracket, 4-connecting cylinder, 5-lower bracket, 6-lateral sampling rack, 7-air filling and suction pipe 1, 8-air filling and suction pipe 2, 9-sampling point locator 1, 10-displacement control cylinder, 11-longitudinal control rack, 12-sampling branch pipe, 13-suction port, 14-sampling point locator 2, 15-lifting slot, 16-lateral sliding slot, 17-reset slider, 18-delivery hose 1, 19- Conveying hose 2, 20-guide cylinder, 21-telescopic cylinder, 22-connecting hole, 23-telescopic rod, 24-air hole, 25-guide slide plate, 26-sampling monitoring tube, 27-sliding circular tube, 28-limiting arc rod, 29-longitudinal slider, 30-deformation buoyancy member, 31-linkage member, 32-water level detector, 33-low position detector, 34-detection slide seat, 35-speed detector, 36-support slider, 37-gravity block. DETAILED DESCRIPTION

[0057] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0058] The specific implementation of the present invention is described in detail below in conjunction with specific embodiments.

[0059] See also Figure 1-Figure 12 The embodiment of the present invention provides a groundwater well washing sampling device, comprising a sampling lifting rod 1, and further comprising:

[0060] An upper bracket 3, the upper bracket 3 is connected to the sampling lifting rod 1, and a connecting cylinder 4 is fixedly mounted on the upper bracket 3, and a lower bracket 5 is fixedly mounted on the bottom end of the connecting cylinder 4;

[0061] and a sampling control mechanism, which is respectively connected to the sampling lifting rod 1, the upper bracket 3, the connecting cylinder 4 and the lower bracket 5, wherein the sampling control mechanism includes a longitudinal control frame 11, a sampling branch pipe 12, a suction port 13, a lateral drive assembly and a position detection assembly;

[0062] The lateral shift driving assembly is respectively connected to the sampling lifting rod 1, the upper bracket 3, the connecting cylinder 4 and the lower bracket 5, and a longitudinal control frame 11 is also installed on the lateral shift driving assembly, and a sampling branch pipe 12 and a suction port 13 are provided on the longitudinal control frame 11, and the sampling branch pipe 12 is connected to the suction port 13, and the position detection assembly is respectively connected to the lower bracket 5 and the lateral shift driving assembly.

[0063] After the well washing is completed and the sampling stage begins, first, the sampling lifting rod 1 can be connected to the external traction device to facilitate driving the entire sampling device to perform sampling at the designated position in the well, wherein the external traction device can use existing equipment, and then, after the connecting cylinder 4 and the lower bracket 5 are immersed in water, the height of the lower bracket 5 from the bottom of the well can be detected through the action of the position detection component to avoid the suction port 13 being too close to the bottom of the well, which affects the sampling accuracy. At this time, the lateral shift drive component is started, wherein the lateral shift drive component includes a plurality of drive components, and can drive the longitudinal control frame 11 between the plurality of upper brackets 3 and the lower bracket 5 to move toward the outside direction of the sampling lifting rod 1 to adjust the distance between the plurality of suction ports 13, so that the suction ports 13 are dispersed at appropriate positions in the well. In addition, under the driving action of the plurality of drive components, the movement distances of the plurality of longitudinal control frames 11 are the same or different, which can be detected according to the position detection component provided on the lateral shift drive component. Each longitudinal control frame 11 is made to have an appropriate width away from the well wall, so that the position of each suction port 13 can be adaptively adjusted according to the different structures in the well (when the structure in the well is circular, the moving distances of multiple longitudinal control frames 11 are the same), so that multiple suction ports 13 are all in suitable positions for sampling operations. Under the action of suction by a submersible pump (the submersible pump is a prior art, not shown in the figure), the liquid in the well enters the sampling branch pipe 12 through the suction port 13, wherein, on the side-moving sampling frame 6, a channel is provided at the position between the sampling branch pipe 12 and the suction port 13, and the liquid entering the sampling branch pipe 12 finally flows into the sample bottle for the staff to subsequently test the sample and take the average value. No further details will be given here, and the operation is simple. By scientifically and reasonably arranging the sampling heads, it can be ensured that the collected groundwater samples are representative and accurate, providing reliable data support for groundwater environmental protection and management, improving the accuracy and efficiency of sampling, and providing convenience for the staff.

[0064] In one embodiment of the present invention, see Figure 1-Figure 12 , the side shift drive assembly comprises:

[0065] A side shifting slot 16, wherein the number of the side shifting slots 16 is multiple, and the multiple side shifting slots 16 are respectively opened on the upper bracket 3 and the lower bracket 5, and each side shifting slot 16 is provided with a reset slider 17;

[0066] A side-shift sampling rack 6, wherein the side-shift sampling rack 6 is fixedly connected to the reset slider 17, wherein the longitudinal control rack 11 is located inside the side-shift sampling rack 6, and a longitudinal slider 29 is fixedly mounted on the longitudinal control rack 11, and the longitudinal slider 29 is slidably connected to the side-shift sampling rack 6;

[0067] and a pneumatic unit, wherein the pneumatic unit is respectively connected to the sampling lifting rod 1 , the upper bracket 3 and the connecting cylinder 4 , and is also connected to the longitudinal control frame 11 .

[0068] The pneumatic unit comprises:

[0069] A flow distribution controller 2, wherein the flow distribution controller 2 is fixedly connected to the sampling lifting rod 1 and the upper bracket 3, and an air filling and suction pipe 7 is also fixedly installed on the flow distribution controller 2;

[0070] A guide cylinder 20, the guide cylinder 20 is located in the connecting cylinder 4, and is connected to the flow distribution controller 2 through a plurality of delivery hoses 19, and a plurality of communication holes 22 are also formed on the guide cylinder 20, and the plurality of communication holes 22 are respectively connected to the plurality of delivery hoses 19;

[0071] A displacement control cylinder 10, one end of which passes through the connecting cylinder 4 and is fixedly connected to the guide cylinder 20, and the displacement control cylinder 10 is also connected to the connecting hole 22;

[0072] And a telescopic rod 23 , one end of which is inserted into the displacement control cylinder 10 and slidably connected to the displacement control cylinder 10 , and the other end of the telescopic rod 23 is fixedly connected to the longitudinal control frame 11 .

[0073] See also Figure 1-Figure 12 , further comprising: lifting slots 15, the number of the lifting slots 15 is equal to the number of the displacement control cylinders 10, and a plurality of the lifting slots 15 are evenly arranged on the connecting cylinder 4;

[0074] And a telescopic cylinder 21, wherein the telescopic cylinder 21 is fixedly installed in the connecting cylinder 4, and the output end of the telescopic cylinder 21 is also fixedly connected to the guiding cylinder 20.

[0075] See also Figure 1-Figure 12 , the position detection component comprises:

[0076] A sampling point locator 9, the number of the sampling point locators 9 is equal to the number of the side-shift sampling racks 6, and a plurality of the sampling point locators 9 are respectively fixedly mounted on a plurality of the side-shift sampling racks 6;

[0077] And a second sampling point locator 14 , wherein the second sampling point locator 14 is fixedly mounted on the lower bracket 5 .

[0078] When the whole sampling equipment reaches the well (the distance between the lower support 5 and the bottom of the well is detected by the sampling point locator 14 to avoid the suction port 13 being too close to the bottom of the well), the external gas source is started to transport the high-pressure gas to the distribution controller 2 through the filling and suction pipe 7, wherein the distribution controller 2 is provided with a plurality of mutually sealed spaces, each of which is provided with a relevant valve member to control the flow direction and flow size of the high-pressure gas in the distribution controller 2. The high-pressure gas distributed by the distribution controller 2 will enter the plurality of delivery hoses 19 respectively, and enter the displacement control tube 10 respectively through the plurality of connecting holes 22 on the guide cylinder 20. Under the push of the high-pressure gas, the telescopic rod 23 can be moved in position. The displacement control cylinder 10 moves in the telescopic rod 23, wherein the displacement control cylinder 10 and the telescopic rod 23 can adopt a structure in which a cylinder sleeve and a piston cooperate, and a spring can also be arranged between the displacement control cylinder 10 and the telescopic rod 23 to reset the telescopic rod 23 after the subsequent sampling is completed. No more details are given here. When the telescopic rod 23 moves, it will push the longitudinal control frame 11 to move synchronously, and the longitudinal control frame 11 will push the lateral displacement sampling frame 6 to move synchronously through the longitudinal slider 29. At this time, the lateral displacement sampling frame 6 will move smoothly in the lateral displacement slide groove 16 under the guidance of the reset slider 17, wherein a spring can also be arranged between the reset slider 17 and the lateral displacement slide groove 16 to provide a reset function, so that The suction port 13 can be driven to move toward the outside of the sampling lifting rod 1, so that the suction port 13 is in a dispersed state for sampling operation, thereby ensuring the accuracy of sampling. In addition, during the movement of the side-shift sampling rack 6, the length of the position of the side-shift sampling rack 6 after movement from the well wall can be detected through the set sampling point locator 9, and the detection result can be fed back to the distribution controller 2, thereby changing the flow direction and flow size of the high-pressure gas in the distribution controller 2, thereby achieving the same or different movement distances of multiple side-shift sampling racks 6, so that according to the structure in the well, especially the irregular structure, multiple suction ports 13 can collect samples at different positions, thereby ensuring the accuracy of the sampling results. After the sampling is completed, the external air source is used to suck the gas into the displacement control cylinder 10, and under the elastic action of the spring, each component can be quickly restored to its original position, and driven by the external traction device, the entire sampling device can be moved up and out of the monitoring well. The telescopic cylinder 21 is set to push the guide cylinder 20 to slide in the connecting cylinder 4, and drive multiple longitudinal control frames 11 to move synchronously, so that the height of the suction port 13 in the well can be changed to meet the needs of various sampling work (for example, during the sampling process, factors such as water level changes occur, and the height of the suction port 13 needs to be quickly fine-tuned), thereby improving the practicability and flexibility of the equipment, which will not be described in detail here.

[0079] In one embodiment of the present invention, see Figure 1-Figure 12, further comprising: a sampling monitoring tube 26, wherein the sampling monitoring tube 26 is fixedly mounted on the longitudinal control frame 11 and is electrically connected to a valve member provided on the sampling branch pipe 12;

[0080] and a monitoring component, wherein the monitoring component is respectively connected to the flow distribution controller 2, the upper bracket 3, the side shift sampling rack 6 and the sampling monitoring tube 26, wherein the monitoring component includes a buoyancy monitoring unit and a sampling monitoring unit;

[0081] The buoyancy monitoring unit is connected to the flow distribution controller 2, the upper bracket 3 and the lateral sampling rack 6 respectively, and the sampling monitoring unit is connected to the sampling monitoring tube 26 and to the buoyancy monitoring unit.

[0082] The buoyancy monitoring unit comprises:

[0083] A guide chute plate 25, wherein the guide chute plate 25 is fixedly connected to the side-shift sampling rack 6;

[0084] A sliding circular tube 27, wherein the sliding circular tube 27 is inserted into the guide slide plate 25 and is slidably connected to the guide slide plate 25, and a limit arc rod 28 and a deformable buoyancy member 30 are also provided on the sliding circular tube 27, wherein the limit arc rod 28 is in contact with the deformable buoyancy member 30, and the deformable buoyancy member 30 is also connected to the sliding circular tube 27;

[0085] A water level detector 32, wherein the water level detector 32 is fixedly mounted on the side-shift sampling rack 6, and the water level detector 32 is also detachably connected to the limit arc rod 28;

[0086] And a buoyancy change module, wherein the buoyancy change module is connected to the flow distribution controller 2, the upper bracket 3 and the sliding circular tube 27 respectively.

[0087] The buoyancy change module comprises:

[0088] A second air filling and suction pipe 8, wherein the second air filling and suction pipe 8 is fixedly connected to the flow distribution controller 2;

[0089] An air hole 24, the air hole 24 is provided on the upper bracket 3 and is connected to the second air filling and suction pipe 8;

[0090] And a delivery hose 18, one end of which is fixedly connected to the upper bracket 3 and communicated with the air hole 24, and the other end of the delivery hose 18 is communicated with the sliding circular tube 27.

[0091] See also Figure 1-Figure 12 , the sampling monitoring unit comprises:

[0092] A detection slide 34, wherein the detection slide 34 is fixedly installed in the sampling monitoring tube 26;

[0093] A support slider 36, wherein the support slider 36 is slidably connected to the detection slider 34, and a gravity block 37 is fixedly mounted on the support slider 36;

[0094] A linkage member 31, one end of which is fixedly connected to the gravity block 37, and the other end of which passes through the sampling monitoring tube 26 and is fixedly connected to the deformation buoyancy member 30;

[0095] And a low-level detector 33 , which is fixedly installed in the sampling monitoring tube 26 and detachably connected to the gravity block 37 , and the low-level detector 33 is also electrically connected to the valve member provided on the sampling branch pipe 12 .

[0096] The device further comprises a speed detector 35 , which is distributed on the detection slide 34 and is slidably connected to the support slide 36 , and the speed detector 35 is also electrically connected to a valve member provided on the sampling branch pipe 12 .

[0097] In the early stage of sampling, in order to make the position of the suction port 13 more accurate (the position from the bottom of the well, the well wall and the water surface should be appropriate to suck liquid samples that better reflect the actual parameters), after the lower bracket 5 and the connecting cylinder 4 reach the water, the external gas source can be used to inflate the filling and suction pipe 8, and the high-pressure gas will enter the conveying hose 18 through the air hole 24, and enter the sliding circular tube 27 through the conveying hose 18, and finally flow into the deformable buoyancy member 30 (a certain amount of gas is supplied to the deformable buoyancy member 30), wherein the deformable buoyancy member 30 can be in the form of an air bag, which will expand when filled with gas. In addition, under the limiting action of the limiting arc rod 28 (the limiting arc rod 28 adopts a cross structure and is composed of two arc rods to expand the deformable buoyancy member 30 direction), the height of the limiting arc rod 28 in the longitudinal direction can be kept unchanged while the volume of the deformable buoyancy member 30 increases, so as to facilitate the subsequent accurate detection of the height of the suction port 13 from the water surface (see the following content for details). When the volume of the deformable buoyancy member 30 increases, since the deformable buoyancy member 30 is in the water (in the initial stage of sampling, since the deformable buoyancy member 30 is in a deflated state and under the action of the gravity of the linkage member 31, the deformable buoyancy member 30 will be in the lowest position. At this time, the length of the deformable buoyancy member 30 from the top of the lateral displacement sampling rack 6 is the largest. In addition, in this process, the gravity block 37 will contact the low-position detector 33, and the low-position detector 33 will control the valve member on the sampling branch pipe 12 to close. The valve member is set close to the suction port 13, so that In order to prevent liquid at other positions from entering the sampling branch pipe 12 during the sinking of the entire sampling equipment, thereby affecting the accuracy of subsequent detection results, which will not be elaborated here), the buoyancy of the deformable buoyancy member 30 will also increase, and the deformable buoyancy member 30 will drive the sliding circular tube 27 to slide smoothly on the guide slide plate 25, and pull the gravity block 37 to move upward synchronously. At this time, the air supply to the deformable buoyancy member 30 is stopped. When the limit arc rod 28 contacts the water level detector 32, the distance between the limit arc rod 28 and the water level detector 32 can be determined by detecting the size of the compressive force on the water level detector 32 (for example, when the deformable buoyancy member 30 floats on the water surface and has just contacted the water level detector 32, at this time, the pressure detected by the water level detector 32 is relatively small , and at this time the suction port 13 is in a more suitable sampling position, that is, the position away from the water surface is appropriate. If the deformable buoyancy member 30 is in the water, the limiting arc rod 28 contacts the water level detector 32, or the limiting arc rod 28 does not contact the water level detector 32, then the pressure state detected by the water level detector 32 is abnormal. At this time, the sampling position of the suction port 13 may be inappropriate, which will not be described in detail here). After being detected by multiple detectors, the suction port 13 is in an appropriate position. At this time, sampling operations can be carried out. As the sampling proceeds, when the water level in the well decreases, the deformable buoyancy member 30 will move downward with the water level. Since the length of the linkage member 31 is fixed (wherein the linkage member 31 can be in the form of a cylindrical rod or a wire rope,Here, it is preferably in the form of a steel wire rope, which will not be described in detail here), then the gravity block 37 will also move downward synchronously. At this time, the support slider 36 will move downward smoothly under the guidance of the detection slide 34, and the speed detector 35 can detect the average speed of the support slider 36. If the support slider 36 moves downward at a faster speed, it can indirectly indicate that the speed of extracting liquid during sampling is faster, which will increase the disturbance to the water body in the well, thereby increasing the dissipation of volatile substances in the water, affecting the accuracy of the sampling results. Therefore, the speed detector 35 will control the valve on the sampling branch pipe 12 to reduce the speed of extracting liquid, thereby achieving the purpose of real-time monitoring. In addition, through the low-level detector 33, when the gravity block 37 contacts the low-level detector 33, it means that the water level has dropped to a critical position. At this time, the low-level detector 33 will control the valve on the sampling branch pipe 12 to close to end the sampling work, thereby avoiding the migration of pollutants between different layers caused by a large drop, thereby affecting the sampling results. In addition, for example, if the water level in the well is low, under the detection of the sampling point locator 14, the lower bracket 5 can no longer continue to descend, otherwise the suction port 13 is too close to the bottom of the well, and after the deformation buoyancy member 30 is inflated, the limit arc rod 28 on the deformation buoyancy member 30 does not contact the water level detector 32. At this time, the telescopic cylinder 21 can be started and the longitudinal control frame 11 can be pushed to move upward until the limit arc rod 28 contacts the water level detector 32. At this time, the longitudinal control frame 11 moves toward the top direction of the side shift sampling frame 6. Due to the limited water level in the well, the gravity block 37 is compared with the normal sampling working state. The length of the gravity block 37 is smaller than that of the low-level detector 33. As the sampling work proceeds, the sliding tube 27 is more likely to trigger the low-level detector 33. Therefore, in the extreme case of low water level in the well, the monitoring component is more likely to be triggered to work, thereby not only ensuring the smooth completion of the sampling work, but also ensuring the accuracy of the sampling results. I will not go into details here.

[0098] It should be noted that in the present invention, unless otherwise clearly specified and limited, the terms "slide", "rotate", "fix", "have" and the like should be understood in a broad sense, for example, it can be a welding connection, a bolt connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0099] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A groundwater well washing sampling device, comprising a sampling lifting rod, characterized in that: Also includes: An upper bracket, the upper bracket is connected to the sampling lifting rod, and a connecting cylinder is fixedly installed on the upper bracket, and a lower bracket is fixedly installed on the bottom end of the connecting cylinder; and a sampling control mechanism, wherein the sampling control mechanism is respectively connected to the sampling lifting rod, the upper bracket, the connecting cylinder and the lower bracket, wherein the sampling control mechanism includes a longitudinal control frame, a sampling branch pipe, a suction port, a lateral shift drive assembly and a position detection assembly; The lateral shift driving assembly is respectively connected to the sampling lifting rod, the upper bracket, the connecting cylinder and the lower bracket, and a longitudinal control frame is also installed on the lateral shift driving assembly, a sampling branch pipe and a suction port are arranged on the longitudinal control frame, and the sampling branch pipe is connected to the suction port, and the position detection assembly is respectively connected to the lower bracket and the lateral shift driving assembly; The side shift driving assembly comprises: a side shift slide groove, the number of the side shift slide grooves is multiple, the multiple side shift slide grooves are respectively opened on the upper bracket and the lower bracket, and each of the side shift slide grooves is provided with a reset slider; A side-shift sampling rack, wherein the side-shift sampling rack is fixedly connected to the reset slider, wherein the longitudinal control rack is located inside the side-shift sampling rack, and a longitudinal slider is fixedly mounted on the longitudinal control rack, and the longitudinal slider is slidably connected to the side-shift sampling rack; and a pneumatic unit, wherein the pneumatic unit is respectively connected to the sampling lifting rod, the upper bracket and the connecting cylinder, and is connected to the longitudinal control frame; The pneumatic unit comprises: a flow distribution controller, which is fixedly connected to the sampling lifting rod and the upper bracket respectively, and a charging and suction pipe 1 is also fixedly installed on the flow distribution controller; A guide cylinder, the guide cylinder is located in the connecting cylinder and is connected to the flow distribution controller through a plurality of second delivery hoses, and a plurality of communication holes are also provided on the guide cylinder, and the plurality of communication holes are respectively connected to a plurality of second delivery hoses; A displacement control cylinder, one end of which passes through the connecting cylinder and is fixedly connected to the guide cylinder, and the displacement control cylinder is also connected to the connecting hole; and a telescopic rod, one end of which is inserted into the displacement control cylinder and slidably connected to the displacement control cylinder, and the other end of which is fixedly connected to the longitudinal control frame; It also includes: a sampling monitoring tube, which is fixedly mounted on the longitudinal control frame and electrically connected to the valve member provided on the sampling branch pipe; and a monitoring component, wherein the monitoring component is respectively connected to the flow distribution controller, the upper bracket, the side-shift sampling rack and the sampling monitoring tube, wherein the monitoring component includes a buoyancy monitoring unit and a sampling monitoring unit; The buoyancy monitoring unit is connected to the flow distribution controller, the upper bracket and the side-shift sampling rack respectively, and the sampling monitoring unit is connected to the sampling monitoring tube and to the buoyancy monitoring unit; The buoyancy monitoring unit comprises: a guide slide plate, the guide slide plate is fixedly connected to the side-shift sampling rack; A sliding circular tube, the sliding circular tube is inserted into the guide slide plate and is slidably connected with the guide slide plate, and a limit arc rod and a deformable buoyancy member are also provided on the sliding circular tube, wherein the limit arc rod is in contact with the deformable buoyancy member, and the deformable buoyancy member is also connected with the sliding circular tube; A water level detector, the water level detector is fixedly mounted on the side-shift sampling rack, and the water level detector is also detachably connected to the limit arc rod; wherein, when the limit arc rod contacts the water level detector, the distance between the limit arc rod and the water level detector is determined by detecting the magnitude of the compressive force on the water level detector; and a buoyancy change module, wherein the buoyancy change module is respectively connected to the flow distribution controller, the upper bracket and the sliding circular tube; The buoyancy change module comprises: a second air filling and suction pipe, wherein the second air filling and suction pipe is fixedly connected to the flow distribution controller; An air hole is provided on the upper bracket and is connected to the second air filling and suction pipe; and a delivery hose 1, one end of which is fixedly connected to the upper bracket and communicated with the air hole, and the other end of which is communicated with the sliding circular tube; The sampling monitoring unit comprises: a detection slide, which is fixedly installed in the sampling monitoring cylinder; A supporting slide block, wherein the supporting slide block is slidably connected to the detection slide seat, and a gravity block is fixedly mounted on the supporting slide block; A linkage member, one end of which is fixedly connected to the gravity block, and the other end of which passes through the sampling and monitoring tube and is fixedly connected to the deformation buoyancy member; and a low-position detector, which is fixedly installed in the sampling monitoring tube and detachably connected to the gravity block, and is also electrically connected to a valve member provided on the sampling branch pipe.

2. The underground water well washing sampling equipment according to claim 1, characterized in that: Also includes: Lifting slots, the number of which is equal to the number of the displacement control cylinders, and a plurality of the lifting slots are evenly arranged on the connecting cylinder; And a telescopic cylinder, the telescopic cylinder is fixedly installed in the connecting cylinder, and the output end of the telescopic cylinder is also fixedly connected to the guiding cylinder.

3. The underground water well washing sampling equipment according to claim 2 is characterized in that: The position detection component comprises: Sampling point locator one, the number of the sampling point locator one is equal to the number of the side-shift sampling racks, and a plurality of the sampling point locators one are respectively fixedly mounted on a plurality of the side-shift sampling racks; And a second sampling point locator, wherein the second sampling point locator is fixedly mounted on the lower bracket.

4. The underground water well washing sampling equipment according to claim 1, characterized in that: Also includes: The speed detector is distributed on the detection slide and is slidably connected to the support slide. The speed detector is also electrically connected to the valve member provided on the sampling branch pipe.

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