An intermittent automatic water extraction device for preventing and controlling groundwater pollution

Abstract

The invention relates to groundwater sampling technology, and discloses an intermittent automatic water extraction device for groundwater pollution prevention and control, including a box body, etc.; an axle frame is fixedly connected to the box body, a wire storage frame is rotatably connected in the axle frame, a pull rope is wound around the wire storage frame, and the pull rope is loosened when the wire storage frame rotates, one end of the pull rope is fixedly connected to the wire storage frame, and the other end passes through the box body and is fixedly connected to the sampling tube, the sampling tube enters the sampling well and extracts sample water therefrom, and a locking mechanism is installed on the sampling tube, and the locking mechanism is used to lock the sampling tube to control its water extraction depth. The device automatically lowers the sampling tube through the wire storage frame, a guide frame is provided in the box body to limit the position of the pull rope, and the pull rope is completely located in the box body, and the external environment can be prevented from affecting the pull rope during the process of lowering or retracting the sampling tube, ensuring that the sampling tube is lifted and lowered smoothly, avoiding collision between the sampling tube and the sampling well wall, and preventing debris on the inner wall of the sampling well from falling into the sampling tube, thereby ensuring the accuracy of the detection result.

Description

Technical Field

[0001] The invention relates to groundwater sampling technology, in particular to an intermittent automatic water sampling device for preventing and controlling groundwater pollution. Background Art

[0002] With the development of economy and the progress of society, the scale of cities is getting larger and larger. In groundwater detection and management, accurate monitoring of groundwater quality is crucial for contaminated site investigation, environmental risk management and remediation system performance evaluation.

[0003] For sampling wells in some remote locations or with complex terrain, it is difficult to build a groundwater monitoring system. Usually a hole is drilled and a small-diameter sampling pipe is installed to sample the groundwater. Sampling is usually done manually, using a rope to control the sampling tube to descend along the sampling pipe and extract groundwater. Sampling is completed manually.

[0004] During the manual sampling process, workers pull the sampling tube up with a rope. Since the rope is uncontrollable, the sampling tube will shake, causing the water in the sampling tube to spill outward, affecting the amount of water taken. When the sampling tube shakes, it will collide with the inner wall of the sampling pipe, and the dust attached to the inner wall of the sampling pipe will be knocked off. The dust falling into the sampling tube will affect subsequent detection, thereby affecting the accuracy of the detection. Summary of the invention

[0005] The present invention provides an intermittent automatic water extraction device for preventing and controlling groundwater pollution to solve the above-mentioned problem.

[0006] The technical solution of the present invention is: an intermittent automatic water extraction device for groundwater pollution prevention and control, including a box body, an axle frame, a wire storage rack, a pull rope, a sampling tube and a locking mechanism. The box body is fixedly connected to the axle frame, and the wire storage rack is rotatably connected inside the axle frame. A pull rope is wound around the wire storage rack, and the pull rope passes through the box body and is fixedly connected to the sampling tube. The sampling tube enters the sampling well and extracts sample water therefrom. The locking mechanism is installed on the sampling tube, and the locking mechanism is used to lock the sampling tube to control its water extraction depth.

[0007] Preferably, the sampling barrel includes a top cover, a connecting rod, a movable disk, a sealing disk, a lifting shaft, a water pumping plug, a water pumping spring, a fixed chassis, a rotating sealing frame and a fixed rod. The top of the sampling barrel is fixedly connected to the top cover, the pull rope is fixedly connected to the top cover, the top cover is slidably connected to the connecting rod, the sampling barrel is fixedly connected to the sealing disk, the sealing disk is slidably connected to the lifting shaft, the bottom end of the lifting shaft is fixedly connected to the water pumping plug, the water pumping plug is slidably connected to the sampling barrel, the top of the lifting shaft is fixedly connected to the movable disk, the movable disk is located at the top of the sealing disk, the movable disk is fixedly connected to the bottom end of the connecting rod, a water pumping spring is provided between the movable disk and the sealing disk, the bottom end of the sampling barrel is fixedly connected to the fixed chassis, the rotating sealing frame is rotatably connected to the fixed chassis, the rotating sealing frame is rotatably connected to the lifting shaft, the top of the rotating sealing frame is fixedly connected to the fixed rod, the lifting shaft is provided with a slide groove, and the fixed rod is located in the slide groove on the lifting shaft.

[0008] Preferably, the locking mechanism includes a fixed frame, a fixed plate, a movable shaft, a fixed slide, a conveying gear, a wedge-shaped baffle, a blocking spring and an unlocking assembly. The fixed frame is fixedly connected to the sampling barrel, a fixed plate is fixedly connected to the fixed frame, a movable shaft is slidably connected to the fixed plate, a conveying gear is rotatably connected to the fixed frame, a thread is provided on one end of the movable shaft close to the conveying gear, the conveying gear is threadedly connected to the movable shaft, a fixed slide is fixedly connected to the fixed frame, a wedge-shaped baffle is slidably connected to the fixed slide, a straight plate is fixedly connected to one end of the movable shaft close to the fixed slide, the wedge-shaped baffle is slidably connected to the straight plate on the movable shaft, the wedge-shaped baffle is connected to the straight plate of the movable shaft through a blocking spring, and the unlocking assembly is installed outside the sampling barrel, and the unlocking assembly is used to release the restriction of the wedge-shaped baffle on the movable disk.

[0009] Preferably, the unlocking assembly includes a guide rod, a buoyancy ring, a fixed pin seat and a lifting rack. The guide rod is fixedly connected to the fixed frame, and the buoyancy ring is slidably connected to the guide rod. The buoyancy ring is slidably sleeved on the outside of the sampling tube. The buoyancy ring is fixedly connected to the fixed pin seat, and the lifting rack is installed on the fixed pin seat. The lifting rack passes through the fixed frame and meshes with the conveying gear therein.

[0010] Preferably, the sampling depth is adjusted by adjusting the tooth density of the lifting rack, and the lifting rack can mesh with conveying gears of different diameters at different positions of the fixed pin seat, and the sampling depth can also be adjusted.

[0011] Preferably, it also includes a fixing ring, the bottom of the box body is fixedly connected with the fixing ring, and a rubber pad is fixedly connected to one side where the two fixing rings are close to each other.

[0012] Preferably, it also includes a guide shaft, a top shell, a sliding top plate, an L-shaped frame and a reset spring. The guide shaft is rotatably connected inside the box, the top shell is fixedly connected to the top of the box, the top of the guide shaft on the left side passes through the box and is connected to the top shell, the sliding top plate is slidably connected to the guide shaft, the L-shaped frame is fixedly connected to the sliding top plate, the L-shaped frame is slidably connected to the box, the L-shaped frame is slidably connected to the guide shaft, and the sliding top plate is connected to the box through a reset spring.

[0013] Preferably, it also includes a fixed round rod, a lifting push block, a rotating frame and a water storage cylinder. The fixed round rod is fixedly connected to the top of the guide shaft, the lifting push block is fixedly connected to the L-shaped frame, the lifting push block is sleeved on the guide shaft, the rotating frame is fixedly connected to the guide shaft, and a water storage cylinder is placed in the rotating frame.

[0014] Preferably, it also includes a fixed sleeve, a sliding plate, a retaining ring, a sliding positioning frame, a positioning arc plate, a positioning spring, a sliding push rod and a connecting spring. The fixed sleeve is fixed on the guide shaft, the sliding plate is slidably connected to the guide shaft, the retaining ring is fixed in the sliding plate, the sliding positioning frame is slidably connected in the sliding plate, the sliding positioning frame and the sliding plate are connected through a positioning spring, the positioning arc plate is fixed on the sliding positioning frame, the sliding plate is slidably connected to the sliding push rod, and the sliding push rod and the sliding plate are connected through a connecting spring.

[0015] The beneficial effects are as follows: 1. The device automatically lowers the sampling tube through the wire storage rack, and a guide frame is arranged in the box body to limit the position of the pull rope, and the pull rope is entirely located in the box body, so that the external environment can avoid affecting the pull rope in the process of lowering or collecting the sampling tube, thereby ensuring that the sampling tube is lifted and lowered smoothly, and avoiding collision with the inner wall of the sampling well during the lifting and lowering process. During the sampling process, the sampling tube is lowered into the groundwater, and after the locking mechanism releases the restriction on the movable disk, the pumping spring pushes the movable disk up, and then the groundwater is pumped into the sampling tube through the pumping plug, so as to realize the function of extracting groundwater.

[0016] 2. This device extracts groundwater through external equipment control. When the sampling tube rises and resets, the sliding top plate pushes the L-shaped frame to rise. The lifting push block on the L-shaped frame pushes the guide shaft to rotate through the fixed round rod to move the water storage tube to the bottom of the sampling tube, so that the extracted groundwater can be directly stored in the water storage tube. Multiple water storage tubes are installed in this device, which can extract and store groundwater multiple times within a certain time interval, realizing the function of automatically extracting groundwater and collecting stored samples.

[0017] 3. When the sampling depth needs to be adjusted, the tooth density on the lifting rack is adjusted to adjust the rotation speed of the conveying gear, and then the moving speed of the moving shaft is adjusted, or the position of the lifting rack is adjusted to adjust the moving speed of the moving shaft, so as to realize the function of extracting groundwater at different depths.

[0018] 4. The internal structure of the sampling tube is sealed, and the fixed frame and its internal parts will not come into contact with groundwater during the sampling process. The lifting shaft and conveying gears inside the sampling tube and the fixed frame will not come into contact with water, which reduces the wear of internal parts of the sampling tube and increases the service life of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0020] Figure 2 It is a schematic diagram of the cross-sectional structure of the box body of the present invention.

[0021] Figure 3 It is a schematic diagram of the cross-sectional structure of the sampling tube of the present invention.

[0022] Figure 4 It is a schematic diagram of the explosion of the structure at the lifting shaft of the present invention.

[0023] Figure 5 It is a schematic diagram of the cross-sectional structure of the fixing frame of the present invention.

[0024] Figure 6 It is a structural schematic diagram of the sliding top plate of the present invention.

[0025] Figure 7 It is a schematic structural diagram of the fixing ring of the present invention.

[0026] Figure 8 It is a schematic diagram of the cross-sectional structure of the sliding plate of the present invention.

[0027] Fig. 9 It is a schematic diagram of the cross-sectional structure of the lifting shaft of the present invention.

[0028] Fig.10 It is a structural schematic diagram of the lifting and pushing block of the present invention.

[0029] Among them: 1. Box body, 101. Axle frame, 102. Wire storage rack, 103. Pull rope, 104. Guide shaft, 1041. Fixed round rod, 105. Fixed sleeve, 106. Fixed ring, 2. Sampling tube, 201. Top cover, 202. Connecting rod, 203. Moving plate, 204. Sealing plate, 205. Lifting shaft, 2051. Pumping plug, 206. Pumping spring, 207. Fixed bottom plate, 208. Rotating sealing frame, 2081. Fixed rod, 3. Fixed frame, 301. Guide rod, 302. Buoyancy ring, 3021. Fixed pin seat, 303, fixed plate, 304, movable shaft, 305, fixed slide, 306, conveying gear, 307, lifting rack, 308, wedge-shaped blocking frame, 309, blocking spring, 4, top shell, 401, sliding top plate, 402, L-shaped frame, 403, reset spring, 404, lifting push block, 405, rotating frame, 406, water storage cylinder, 5, sliding plate, 501, retaining ring, 502, sliding positioning frame, 5021, positioning arc plate, 5022, positioning spring, 503, sliding push rod, 504, connecting spring. DETAILED DESCRIPTION

[0030] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments, but is not intended to limit the present invention.

[0031] Embodiment 1: An intermittent automatic water extraction device for preventing and controlling groundwater pollution, such as Figure 1-Figure 10 As shown, it includes a box body 1, an axis frame 101, a wire storage frame 102, a pull rope 103, a sampling tube 2 and a locking mechanism. The axis frame 101 is fixedly connected to the box body 1, and the wire storage frame 102 is rotatably connected inside the axis frame 101. A pull rope 103 is wound around the wire storage frame 102. One end of the pull rope 103 is fixedly connected to the wire storage frame 102, and the other end passes through the box body 1 and is fixedly connected to the sampling tube 2. A guide frame is provided in the box body 1. The pull rope 103 is fixedly connected to the sampling tube 2 after passing through the guide frame to ensure that the pull rope 103 is aligned with the center of the circular hole at the bottom of the box body 1, and the sampling tube 2 enters the sampling well and extracts sample water therefrom. The locking mechanism is installed on the sampling tube 2, and the locking mechanism is used to lock the sampling tube 2 to control its water extraction depth.

[0032] When sampling, the entire device is placed on the top of the sampling well, the circular through hole at the bottom of the box body 1 is aligned with the sampling well, and then the device is started. The wire rack 102 rotates at a constant speed and the pull rope 103 is released. At this time, the sampling tube 2 descends due to its own gravity. As the pull rope 103 is continuously released, the sampling tube 2 continues to descend along the sampling well. After the sampling tube 2 contacts the groundwater, it continues to descend. When the locking mechanism contacts the water, it is automatically unlocked. At this time, the sampling tube 2 extracts groundwater and the device is turned off. After a period of stagnation, the sampling tube 2 is filled with groundwater. Then the device is started again and the wire rack 102 is rotated in the opposite direction. The wire rack 102 rotates in the opposite direction to pull the sampling tube 2 up through the pull rope 103. After the sampling tube 2 rises from the sampling well, the groundwater inside it is taken out to realize the function of extracting groundwater.

[0033] Embodiment 2: Based on embodiment 1, Figure 2-Figure 4 and Fig. 9As shown, the sampling tube 2 includes a top cover 201, a connecting rod 202, a movable plate 203, a sealing plate 204, a lifting shaft 205, a water pumping plug 2051, a water pumping spring 206, a fixed bottom plate 207, a rotating sealing frame 208 and a fixed rod 2081. The top of the sampling tube 2 is fixedly connected with the top cover 201, the pull rope 103 is fixedly connected to the top cover 201, and the top cover 201 is slidably connected with the connecting rod 202. There are two connecting rods 202. The tops of the two connecting rods 202 are fixed together by straight rods. The pull rope 103 passes through the straight rods at the tops of the connecting rods 202. The sealing plate 204 is fixedly connected to the sampling tube 2. The sealing plate 204 divides the sampling tube 2 into two parts, the upper and lower parts. The extracted groundwater is located in the lower half of the sampling tube 2. The lifting shaft 205 is slidably connected to the sealing plate 204. The bottom end of the lifting shaft 205 is fixedly connected to the water pumping plug 2051. The plug 2051 is slidably connected to the sampling tube 2, the top of the lifting shaft 205 is fixedly connected to the movable disk 203, the movable disk 203 is located at the top of the sealing disk 204, the movable disk 203 is fixedly connected to the bottom end of the connecting rod 202, a water pumping spring 206 is provided between the movable disk 203 and the sealing disk 204, the water pumping spring 206 is sleeved outside the lifting shaft 205, one end of the water pumping spring 206 is fixedly connected to the sealing disk 204, and the other end is fixedly connected to the movable disk 203, a fixed bottom plate 207 is fixedly connected to the bottom end of the sampling tube 2, a fan-shaped through hole is provided on the fixed bottom plate 207, a rotating sealing frame 208 is rotatably connected inside the fixed bottom plate 207, the rotating sealing frame 208 is rotatably connected to the lifting shaft 205, a fixed rod 2081 is fixedly connected to the top of the rotating sealing frame 208, a slide groove is provided on the lifting shaft 205, and the fixed rod 2081 is located in the slide groove on the lifting shaft 205.

[0034] When the bottom of the sampling tube 2 contacts the groundwater, the middle of the sampling tube 2 is sealed by the sealing disk 204, so the groundwater will not flow into the sampling tube 2 from the fixed bottom plate 207. At this time, the locking mechanism is stuck on the top of the movable disk 203, and the movable disk 203 will not drive the pumping plug 2051 to rise in the sampling tube 2 through the lifting shaft 205. When the locking mechanism contacts the water surface, as the sampling tube 2 continues to descend, the locking mechanism will release the restriction on the movable disk 203. At this time, the pumping spring 206 passes through the movable disk 203. 03 drives the lifting shaft 205 and the pumping plug 2051 to rise in the sampling tube 2. Under the action of the pumping plug 2051, groundwater is pumped into the sampling tube 2. As the movable disk 203 continues to rise, the inclined part of the slide groove on the lifting shaft 205 contacts the fixed rod 2081. The lifting shaft 205 continues to rise and drives the rotating sealing frame 208 to rotate through the fixed rod 2081 and seals the outlet on the fixed base 207 to ensure that groundwater will not leak from the bottom of the sampling tube 2 during its rising process.

[0035] like Figure 3 and Figure 5As shown, the locking mechanism includes a fixed frame 3, a fixed plate 303, a movable shaft 304, a fixed slide 305, a conveying gear 306, a wedge-shaped blocking frame 308, a blocking spring 309 and an unlocking component. The sampling tube 2 is fixedly connected to the fixed frame 3, and a fixed plate 303 is fixedly connected to the fixed frame 3. The movable shaft 304 is slidably connected to the fixed plate 303. The conveying gear 306 is rotatably connected to the fixed frame 3. There are three conveying gears 306, and the diameters of the three conveying gears 306 are different. A thread is provided at one end of the movable shaft 304 close to the conveying gear 306. The conveying gear 306 is threadedly connected to the movable shaft 304. A fixed slide 305 is fixedly connected to the fixed frame 3. A wedge-shaped retaining frame 308 is slidably connected in the slideway 305, and the top surface of the wedge-shaped retaining frame 308 is an inclined surface. The wedge-shaped retaining frame 308 is pressed on the top of the movable disk 203 to limit the position of the movable disk 203. A straight plate is fixedly connected to one end of the movable shaft 304 close to the fixed slideway 305. The wedge-shaped retaining frame 308 is slidably connected to the straight plate on the movable shaft 304. The wedge-shaped retaining frame 308 and the straight plate of the movable shaft 304 are connected through a blocking spring 309. One end of the blocking spring 309 is fixedly connected to the wedge-shaped retaining frame 308, and the other end is fixedly connected to the straight plate of the movable shaft 304. The unlocking component is installed outside the sampling tube 2, and the unlocking component is used to release the restriction of the wedge-shaped retaining frame 308 on the movable disk 203.

[0036] During the descent of the sampling tube 2, the wedge-shaped retaining frame 308 is pressed against the top of the movable disk 203, and the blocking spring 309 limits the position of the wedge-shaped retaining frame 308 to prevent the wedge-shaped retaining frame 308 from sliding away from the top of the movable disk 203 during the descent of the sampling tube 2. When the unlocking assembly contacts the water surface, as the sampling tube 2 continues to descend, the unlocking assembly will drive the conveying gear 306 to rotate. When the conveying gear 306 rotates, it drives the wedge-shaped retaining frame 308 to slide along the fixed slide 305 through the movable shaft 304 and move away from the top of the movable disk 203. When the wedge-shaped retaining frame 308 loses contact with the movable disk 203, the pumping spring 206 pushes the movable disk 203 to rise, and the sampling tube 2 will extract groundwater.

[0037] like Figure 3 and Figure 5As shown, the unlocking assembly includes a guide rod 301, a buoyancy ring 302, a fixed pin seat 3021 and a lifting rack 307. The guide rod 301 is fixedly connected to the fixed frame 3, and the buoyancy ring 302 is slidably connected to the guide rod 301. The buoyancy ring 302 is slidably sleeved on the outside of the sampling tube 2. When the buoyancy ring 302 contacts the water surface in the sampling well, the buoyancy ring 302 slides upward along the guide rod 301 under the influence of buoyancy. The buoyancy ring 302 is fixedly connected to the buoyancy ring 302, and the lifting rack 307 is installed on the fixed pin seat 3021. Three slots are opened on the fixed pin seat 3021, and the lifting rack 307 is inserted into different slots. The lifting rack 307 passes through the fixed frame 3 and meshes with the conveying gear 306 therein. When the buoyancy ring 302 rises, the conveying gear 306 is driven to rotate through the lifting rack 307. When the conveying gear 306 rotates, it drives the moving shaft 304 to slide in the direction away from the sampling tube 2, and at the same time drives the wedge-shaped retaining frame 308 to move away from the top of the moving disk 203. The sampling depth can be adjusted by adjusting the tooth density of the lifting rack 307. The lifting rack 307 can mesh with conveying gears 306 of different diameters at different positions of the fixed pin seat 3021, and the sampling depth can also be adjusted.

[0038] After the buoyancy ring 302 contacts the water surface, the sampling tube 2 continues to descend. The buoyancy ring 302 cannot continue to descend due to the buoyancy of the water. The fixed pin seat 3021 and the lifting rack 307 on the buoyancy ring 302 will stay on the water surface. As the sampling tube 2 and the fixed frame 3 continue to descend, the lifting rack 307 and the conveying gear 306 always remain in meshing with each other under the restriction of the guide rod 301 and the sampling tube 2. The conveying gear 306 descends and rotates along the lifting rack 307. At this time, the conveying gear 306 rotates and drives the moving shaft 304 The wedge-shaped retaining frame 308 slides along the fixed slide 305 to release the restriction of the wedge-shaped retaining frame 308 on the movable plate 203. When the sampling tube 2 rises from the groundwater, the buoyancy ring 302 continues to float on the water surface due to its own gravity. During the rising process of the sampling tube 2 and the fixed frame 3, the conveying gear 306 moves and rotates along the lifting rack 307. When the conveying gear 306 rotates, it pushes the wedge-shaped retaining frame 308 to slide outward along the fixed slide 305 through the moving shaft 304; when it is necessary to adjust the water extraction depth, adjust the lifting rack 307 Tooth density: when the teeth of the lifting rack 307 are sparse, the speed of the conveying gear 306 is slow, and the moving shaft 304 moves slowly. At this time, the sampling tube 2 needs to be lowered to the deep wedge-shaped retaining frame 308 before it can be disengaged from the moving disk 203 to extract groundwater at a deep depth; when the teeth of the lifting rack 307 are dense, the speed of the conveying gear 306 is fast. At this time, the sampling tube 2 is lowered to the diving area, and the wedge-shaped retaining frame 308 will be disengaged from the moving disk 203 to extract groundwater at a shallower place; adjust the meshing with the lifting rack 307 The diameter of the conveying gear 306 can also change the water intake depth. The larger the diameter of the conveying gear 306 is, the longer the distance the lifting rack 307 needs to move when the moving shaft 304 drives the wedge-shaped baffle 308 to disengage from the moving disk 203 is; the smaller the diameter of the conveying gear 306 is, the shorter the distance the lifting rack 307 needs to move when the moving shaft 304 drives the wedge-shaped baffle 308 to disengage from the moving disk 203 is, that is, when the diameter of the conveying gear 306 is large, water is taken in deep water, and when the diameter of the conveying gear 306 is small, water is taken in shallow water.

[0039] Embodiment 3: Based on embodiment 2, Figure 2 and Figure 7 As shown, it also includes a fixing ring 106. The bottom of the box body 1 is fixedly connected with the fixing ring 106. The adjacent sides of the two fixing rings 106 are fixedly connected with rubber pads. The two fixing rings 106 together clamp the box body 1 at the top of the sampling well to fix the box body 1.

[0040] When placing the box 1, the top of the water well is stuck between the rubber pads on the two fixing rings 106 at the bottom of the box 1 to fix the box 1. When the sampling tube 2 moves up and down, the two fixing rings 106 are stuck on the water well, which can limit the box 1 and prevent the box 1 from tilting due to external forces.

[0041] like Figure 6 and Figure 7 As shown, it also includes a guide shaft 104, a top shell 4, a sliding top plate 401, an L-shaped frame 402 and a reset spring 403. The guide shaft 104 is rotatably connected in the box body 1. The top of the box body 1 is fixedly connected to the top shell 4. The top of the guide shaft 104 on the left side passes through the box body 1 and is connected to the top shell 4. The sliding top plate 401 is slidably connected to the guide shaft 104. The L-shaped frame 402 is fixedly connected to the sliding top plate 401. The L-shaped frame 402 is slidably connected to the box body 1. The top of the L-shaped frame 402 is located in the top shell 4. The L-shaped frame 402 is slidably connected to the part of the guide shaft 104 located in the top shell 4. The sliding top plate 401 is connected to the box body 1 through the reset spring 403. The reset spring 403 is sleeved on the L-shaped frame 402. One end of the reset spring 403 is fixedly connected to the sliding top plate 401, and the other end is fixedly connected to the top of the box body 1.

[0042] After the sampling tube 2 extracts groundwater, due to the partial gap between the pumping plug 2051 and the bottom of the sampling tube 2, when the pumping plug 2051 rises to pump water, there is some air between the groundwater and the pumping plug 2051, that is, there is a certain amount of air in the sampling tube 2. After the sampling tube 2 is lifted from the water well, during the process of the sampling tube 2 continuing to rise, the top of the connecting rod 202 in the sampling tube 2 contacts the bottom surface of the sliding top plate 401. At this time, since the outlet on the fixed chassis 207 at the bottom of the sampling tube 2 is blocked by the rotating sealing frame 208, the connecting rod 202, the movable plate 203, the lifting shaft 205 and the pumping plug 2051 are restricted and cannot descend. At this time, the connecting rod 202 on the sampling tube 2 pushes the sliding top plate 401 to rise. During the rising process of the sliding top plate 401, the L-shaped frame 402 rises accordingly, and the return spring 403 between the sliding top plate 401 and the casing 1 is compressed. When the plate 401 rises to the highest point, the sampling tube 2 continues to rise and the sliding top plate 401 will push the movable plate 203 down through the connecting rod 202, and the lifting shaft 205 and the pumping plug 2051 will drop accordingly and compress the air volume in the sampling tube 2. When the lifting shaft 205 drops, the inclined part of its external slide groove will drive the rotating sealing frame 208 to rotate through the fixed rod 2081, and the through hole on the fixed bottom plate 207 is opened. At this time, the groundwater in the sampling tube 2 leaks out from the bottom. During the process of the movable plate 203 descending along the sampling tube 2, it contacts the top inclined surface of the wedge-shaped retaining frame 308. At this time, the movable plate 203 pushes the wedge-shaped retaining frame 308 to slide along the fixed slide 305 and compresses the blocking spring 309. When the movable plate 203 is out of contact with the wedge-shaped retaining frame 308, the blocking spring 309 pushes the wedge-shaped retaining frame 308 to move to the top of the movable plate 203 to re-limit the movable plate 203.

[0043] like Figure 6 , Figure 7 and Fig.10As shown, it also includes a fixed round rod 1041, a lifting push block 404, a rotating frame 405 and a water storage cylinder 406. The fixed round rod 1041 is fixedly connected to the top of the guide shaft 104, and the lifting push block 404 is fixedly connected to the L-shaped frame 402. The lifting push block 404 is sleeved on the guide shaft 104. When the lifting push block 404 rises along the guide shaft 104, the lifting push block 404 at the top pushes the fixed round rod 1041 and the guide shaft 104 to rotate. When the lifting push block 404 descends along the guide shaft 104, the lifting push block 404 at the bottom pushes the fixed round rod 1041 and the guide shaft 104 to rotate. The rotating frame 405 is fixedly connected to the guide shaft 104, and a water storage cylinder 406 is placed in the rotating frame 405. The water storage cylinder 406 is used to receive the groundwater sample extracted by the sampling tube 2.

[0044] The two lifting blocks 404 on the L-shaped frame 402 are arranged with planes and inclined surfaces in an alternating manner. When the sampling tube 2 rises, the L-shaped frame will be pushed up. When the L-shaped frame 402 rises, the lifting block 404 on the top thereof pushes the guide shaft 104 to rotate through the fixed round rod 1041. At this time, the guide shaft 104 drives the water storage cylinder 406 to rotate to the bottom of the sampling tube 2 through the rotating frame 405. The groundwater in the sampling tube 2 falls into the water storage cylinder 406. When the sampling tube 2 descends, the sliding top plate 401 and the L-shaped frame 402 slide downward to reset. When the L-shaped frame 402 descends, the bottom The lifting push block 404 pushes the guide shaft 104 and the device thereon to rotate 60 degrees again through the fixed round rod 1041, and the rotating frame 405 and the water storage cylinder 406 rotate 60 degrees to move the water storage cylinder 406 away from the bottom of the sampling cylinder 2, and the guide shaft 104 rotates in the same direction twice. After a certain period of time, the device is used again for sampling, and the extracted groundwater can be stored in the second water storage cylinder 406. Three water storage cylinders 406 are placed in the rotating frame 405, so that the device can extract groundwater three times in succession, realizing the function of intermittent automatic water extraction.

[0045] like Figure 2 , Figure 7 and Figure 8As shown, it also includes a fixed sleeve 105, a sliding plate 5, a retaining ring 501, a sliding positioning frame 502, a positioning arc plate 5021, a positioning spring 5022, a sliding push rod 503 and a connecting spring 504. The fixed sleeve 105 is fixedly connected to the guide shaft 104, and the position of the fixed sleeve 105 can be adjusted along the guide shaft 104. The sliding plate 5 is slidably connected to the guide shaft 104, and the retaining ring 501 is fixed inside the sliding plate 5. When the sampling tube 2 rises, the top cover 201 at the top thereof pushes the sliding plate 5 to slide upward along the guide shaft 104 through the retaining ring 501. The sliding plate 5 is slidably connected to the sliding positioning frame 502, and the sliding positioning frame 502 is connected to the sliding plate 5 through the positioning spring 5022. One end of the positioning spring 5022 is fixedly connected to the sliding plate 5. The locating frame 502 is fixed with a positioning arc plate 5021, and the positioning arc plate 5021 is used to adjust the state of the sampling tube 2 so that the sampling tube 2 is coaxial with the sampling well. The sliding plate 5 is slidably connected with a sliding push rod 503, and the sliding push rod 503 and the sliding plate 5 are connected through a connecting spring 504. One end of the connecting spring 504 is fixed to the sliding plate 5, and the other end is fixed to the sliding push rod 503. The sliding push rod 503 passes through the sliding positioning frame 502, and there is a protruding part in the middle of the sliding push rod 503. When the sliding push rod 503 rises along the sliding plate 5, the protruding part in the middle pushes the sliding positioning frame 502 to slide along the sliding plate 5, so that the positioning arc plate 5021 is out of contact with the sampling tube 2.

[0046] During the ascending process of the sampling tube 2, under the support of the fixed sleeve 105, the sliding push rod 503 is located at a high position, and the connecting spring 504 between the sliding plate 5 and the sliding push rod 503 is compressed. At this time, the protruding part on the sliding push rod 503 is located in the sliding positioning frame 502, and the two sliding positioning frames 502 are separated from each other. After the top cover 201 contacts the retaining ring 501, the top cover 201 pushes the sliding plate 5 to rise through the retaining ring 501. During the ascending process of the sliding plate 5, the connecting spring 504 first returns to its original state, and the sliding push rod 503 slides out of the sliding positioning frame 502. Under the push of the positioning spring 5022, the two sliding positioning frames 502 move closer to each other, and the positioning arc plates 502 on the two sliding positioning frames 502 1 is stuck on both sides of the sampling tube 2 to limit the position of the sampling tube 2, so that the sampling tube 2 is coaxial with the water well, ensuring that when the water is subsequently released, the bottom outlet of the sampling tube 2 is aligned with the top opening of the water storage tube 406. During the descent of the sampling tube 2, the sliding plate 5 is affected by its own gravity and descends along the guide shaft 104. When the sliding push rod 503 in the sliding plate 5 contacts the fixed sleeve 105, the sliding plate 5 continues to descend, and the sliding push rod 503 slides upward relative to the sliding plate 5 and compresses the connecting spring 504. At this time, the protruding part of the sliding push rod 503 slides into the sliding positioning frame 502 to push the two sliding positioning frames 502 away from each other, thereby causing the positioning arc plate 5021 to break contact with the sampling tube 2, so that the sampling tube 2 continues to descend.

[0047] It should be understood that this embodiment is only used to illustrate the present invention and is not used to limit the scope of the present invention. In addition, it should be understood that after reading the content taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope limited by the appended claims of the application.

Claims

1. An intermittent automatic water extraction device for preventing and controlling groundwater pollution, characterized in that: The invention comprises a box body (1), a shaft frame (101), a wire storage frame (102), a pull rope (103), a sampling tube (2) and a locking mechanism, wherein the box body (1) is fixedly connected to the shaft frame (101), the wire storage frame (102) is rotatably connected inside the shaft frame (101), a pull rope (103) is wound around the wire storage frame (102), the pull rope (103) passes through the box body (1) and is fixedly connected to the sampling tube (2), the sampling tube (2) enters the sampling well and extracts sample water therefrom, and the locking mechanism is installed on the sampling tube (2), and the locking mechanism is used to lock the sampling tube (2) to control its water extraction depth; The sampling tube (2) comprises a top cover (201), a connecting rod (202), a movable plate (203), a sealing plate (204), a lifting shaft (205), a water pumping plug (2051), a water pumping spring (206), a fixed bottom plate (207), a rotating sealing frame (208) and a fixed rod (2081). The top of the sampling tube (2) is fixedly connected to the top cover (201), the pull rope (103) is fixedly connected to the top cover (201), the top cover (201) is slidably connected to the connecting rod (202), the sealing plate (204) is fixedly connected to the sampling tube (2), the lifting shaft (205) is slidably connected to the sealing plate (204), the bottom end of the lifting shaft (205) is fixedly connected to the water pumping plug (2051), and the water pumping plug (2051) is connected to the sampling tube (2). The cylinder (2) is slidably connected, the top of the lifting shaft (205) is fixedly connected to the movable disk (203), the movable disk (203) is located at the top of the sealing disk (204), the movable disk (203) is fixedly connected to the bottom end of the connecting rod (202), a water pumping spring (206) is provided between the movable disk (203) and the sealing disk (204), the bottom end of the sampling cylinder (2) is fixedly connected to a fixed bottom plate (207), a rotating sealing frame (208) is rotatably connected inside the fixed bottom plate (207), the rotating sealing frame (208) is rotatably connected to the lifting shaft (205), the top of the rotating sealing frame (208) is fixedly connected to a fixed rod (2081), a sliding groove is provided on the lifting shaft (205), and the fixed rod (2081) is located in the sliding groove on the lifting shaft (205); It also includes a guide shaft (104), a top shell (4), a sliding top plate (401), an L-shaped frame (402) and a return spring (403); the guide shaft (104) is rotatably connected inside the box body (1); the top of the box body (1) is fixedly connected to the top shell (4); the top of the left guide shaft (104) passes through the box body (1) and is connected to the top shell (4); the guide shaft (104) is slidably connected to the sliding top plate (401); the sliding top plate (402) is fixedly connected to the L-shaped frame (402); the L-shaped frame (402) is slidably connected to the box body (1); the L-shaped frame (402) is slidably connected to the guide shaft (104); and the sliding top plate (401) is connected to the box body (1) via the return spring (403); It also includes a fixed round rod (1041), a lifting push block (404), a rotating frame (405) and a water storage cylinder (406); the fixed round rod (1041) is fixedly connected to the top of the guide rotating shaft (104); the lifting push block (404) is fixedly connected to the L-shaped frame (402); the lifting push block (404) is sleeved on the guide rotating shaft (104); the rotating frame (405) is fixedly connected to the guide rotating shaft (104); and the water storage cylinder (406) is placed in the rotating frame (405); The invention also comprises a fixing sleeve (105), a sliding plate (5), a retaining ring (501), a sliding positioning frame (502), a positioning arc plate (5021), a positioning spring (5022), a sliding push rod (503) and a connecting spring (504); the fixing sleeve (105) is fixedly connected to the guide shaft (104); the sliding plate (5) is slidably connected to the guide shaft (104); the retaining ring (501) is fixedly connected inside the sliding plate (5); the sliding positioning frame (502) is slidably connected inside the sliding plate (5); the sliding positioning frame (502) and the sliding plate (5) are connected via the positioning spring (5022); the positioning arc plate (5021) is fixedly connected to the sliding positioning frame (502); the sliding plate (5) is slidably connected to the sliding push rod (503); and the sliding push rod (503) and the sliding plate (5) are connected via the connecting spring (504).

2. An intermittent automatic water extraction device for groundwater pollution prevention and control as claimed in claim 1, characterized in that: The locking mechanism comprises a fixed frame (3), a fixed plate (303), a movable shaft (304), a fixed slideway (305), a conveying gear (306), a wedge-shaped blocking frame (308), a blocking spring (309) and an unlocking assembly. The sampling tube (2) is fixedly connected to the fixed frame (3), the fixed plate (303) is fixedly connected to the fixed frame (3), the movable shaft (304) is slidably connected to the fixed plate (303), the conveying gear (306) is rotatably connected to the fixed frame (3), a thread is provided at one end of the movable shaft (304) close to the conveying gear (306), and the conveying gear (306) is connected to the fixed frame (3). The movable shaft (304) is threadedly connected, a fixed slideway (305) is fixedly connected inside the fixed frame (3), a wedge-shaped retaining frame (308) is slidably connected inside the fixed slideway (305), a straight plate is fixedly connected to one end of the movable shaft (304) close to the fixed slideway (305), the wedge-shaped retaining frame (308) is slidably connected to the straight plate on the movable shaft (304), the wedge-shaped retaining frame (308) and the straight plate of the movable shaft (304) are connected via a blocking spring (309), an unlocking assembly is installed outside the sampling tube (2), and the unlocking assembly is used to release the restriction of the wedge-shaped retaining frame (308) on the movable disk (203).

3. An intermittent automatic water extraction device for preventing and controlling groundwater pollution as claimed in claim 2, characterized in that: The unlocking assembly comprises a guide rod (301), a buoyancy ring (302), a fixed pin seat (3021) and a lifting rack (307); the guide rod (301) is fixedly connected to the fixed frame (3); the buoyancy ring (302) is slidably connected to the guide rod (301); the buoyancy ring (302) is slidably sleeved on the outside of the sampling tube (2); the buoyancy ring (302) is fixedly connected to the buoyancy ring (302); the lifting rack (307) is installed on the fixed pin seat (3021); the lifting rack (307) passes through the fixed frame (3) and meshes with the conveying gear (306) therein.

4. An intermittent automatic water extraction device for preventing and controlling groundwater pollution as claimed in claim 3, characterized in that: The sampling depth can be adjusted by adjusting the tooth density of the lifting rack (307); the lifting rack (307) can mesh with the conveying gear (306) of different diameters at different positions of the fixed pin seat (3021), and the sampling depth can also be adjusted.

5. The intermittent automatic water extraction device for preventing and controlling groundwater pollution according to claim 1, characterized in that: It also includes a fixing ring (106), the fixing ring (106) being fixedly connected to the bottom of the box body (1), and a rubber pad being fixedly connected to one side of the two fixing rings (106) adjacent to each other.

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