A sampling device for groundwater recharge

Abstract

The present application relates to the technical field of groundwater sampling, and specifically provides a sampling device for groundwater recharge, which comprises a sampling cylinder, a liquid storage cavity is formed in the sampling cylinder by a plurality of partitions, a plurality of liquid inlet pipes are arranged in one-to-one correspondence with the liquid storage cavities and are communicated with the top of the liquid storage cavities, a liquid discharge pipe is arranged at the bottom of the liquid storage cavity, a pipe sealing mechanism is arranged on each liquid inlet pipe, and the pipe sealing mechanism comprises a one-way valve plate; a cable protection mechanism comprises a fixed support, a cable support is fixed on the fixed support through a supporting rod; a centering mechanism comprises a connecting rod, a ring seat is fixed at the bottom of the sampling cylinder through the connecting rod, and a positioning rod is installed on the ring seat. Before sampling groundwater at different depths, the one-way valve plate is adjusted to ensure that the one-way valve plate can be opened by water pressure only after reaching a certain depth, so that groundwater at a deeper position can be sampled; after sampling is completed, the pressure inside and outside the liquid storage cavity is balanced, the one-way valve plate is reset to seal the liquid inlet pipe, and the sample in the liquid storage cavity is prevented from spilling out.

Description

Technical Field

[0001] This invention relates to the field of groundwater sampling technology, and more particularly to a sampling device for groundwater recharge. Background Technology

[0002] Groundwater recharge refers to the use of wells to construct water replenishment projects, injecting water from surface water or other water sources into the ground to replenish groundwater storage. Groundwater recharge sampling is mainly to ensure that the water quality of the recharge source meets relevant standards and requirements, and to avoid pollution or adverse effects on the groundwater environment.

[0003] Most existing groundwater recharge sampling devices involve installing a support frame at the wellhead and then lowering the device for operation. This has the following drawbacks: 1. The sampling device may not reach the designated depth of the groundwater layer, resulting in the sampled water source not being at the target depth, thus affecting sampling accuracy. 2. Some sampling devices often use a hanging cable to lower the sampler into the pipe. During sampling, the sampler is prone to shaking, causing it to collide with the inner wall of the pipe, affecting sample collection, and potentially leading to cable tangling or even damage. Summary of the Invention

[0004] The technical problem to be solved by this invention is: in order to solve the problem that it is difficult for the sampler to reach the specified depth for sampling smoothly during the deployment and retrieval process, this invention provides a sampling device for groundwater recharge to solve the above problem.

[0005] The technical solution adopted by this invention to solve its technical problem is as follows: a sampling device for groundwater recharge, including a sampling cylinder, wherein the sampling cylinder is divided into liquid storage chambers by multiple partitions, and further including an inlet pipe, a cable protection mechanism and a centering mechanism. Multiple inlet pipes are provided corresponding to the liquid storage chambers and communicate with the top of the liquid storage chambers. A drain pipe is provided at the bottom of each liquid storage chamber. A sealing mechanism is installed on each inlet pipe. The sealing mechanism includes a one-way valve plate, which can open into the sampling cylinder. The cable protection mechanism includes a fixed bracket, a support rod, and a cable support. The fixed bracket is installed at the wellhead, and the cable support is fixed to the fixed bracket by the support rod. The cable support is aligned with the center of the wellhead and is used to guide the cable. The centering mechanism includes a connecting rod, a ring seat, and a positioning rod. The ring seat is fixed to the bottom of the sampling cylinder by the connecting rod, and the positioning rod is installed on the ring seat. One end of the positioning rod near the outer ring of the ring seat can abut against the inner wall of the well.

[0006] Preferably, the sealing mechanism further includes a central support, a guide rod, and a compression spring. The central support is fixed inside the inlet pipe. The guide rod is slidably mounted on the central support and is coaxial with the inlet pipe. The center of the one-way valve plate is fixedly connected to the guide rod. The other end of the guide rod is connected to a compression head. The compression spring is sleeved on the guide rod, and both ends of the compression spring abut against the compression head and the central support, respectively.

[0007] Preferably, an adjusting screw is fixed at the center of the clamping head, and the adjusting screw is inserted into the guide rod and threadedly connected to the guide rod.

[0008] Preferably, a hemispherical mesh cover is installed at one end of the inlet pipe outside the sampling cylinder, and the hemispherical mesh cover is threadedly connected to the inlet pipe.

[0009] Preferably, three hinge seats are installed at equal intervals on the fixed bracket, and a bent rod is installed on each hinge seat. The bent part of the bent rod is rotatably connected to the hinge seat, and a positioning ring is rotatably installed on the upper end of the bent rod. A pin is slidably connected inside the positioning ring.

[0010] Preferably, the fixed bracket has a notch, and the cable bracket has a planar spiral structure, so that the cable can slide from the outer ring of the cable bracket along the spiral opening of the cable bracket into the center of the cable bracket.

[0011] Preferably, the centering mechanism further includes a central screw, a push plate, a nut sleeve, and multiple push rods. The multiple push rods are fixed at equal intervals on the upper surface of the push plate. The push plate is slidably sleeved on the central screw. The nut sleeve is rotatably mounted on the bottom of the push plate and threadedly connected to the central screw. The central screw is fixed to the bottom of the sampling cylinder. The diameter of the push plate is smaller than the inner diameter of the ring seat. The positioning rod is rotatably connected to the ring seat. The end of the positioning rod near the inner ring of the ring seat is slidably connected to the push rod.

[0012] The beneficial effects of this invention are that it is equipped with a sealing mechanism. Before sampling groundwater at different depths, the one-way valve plate is adjusted to ensure that it can be opened by water pressure after reaching a certain depth, thus enabling sampling of groundwater at deeper locations. When sampling groundwater at shallower locations, the tension on the one-way valve plate is reduced. After sampling, the pressure inside and outside the liquid storage chamber is balanced, and the one-way valve plate resets to seal the inlet pipe, preventing the sample in the liquid storage chamber from spilling out.

[0013] Furthermore, the sampling cylinder is equipped with multiple liquid storage chambers, which are stacked vertically. Each liquid storage chamber is equipped with an inlet pipe and a sealing mechanism at its top. Therefore, before sampling, the pressure of the one-way valve plates of the multiple sealing mechanisms is adjusted to gradually increase the pressure from top to bottom. Then, the sampling cylinder is lowered into the wellhead. When the sampling cylinder descends to different water depths, different one-way valve plates can be opened to collect samples, achieving the effect of sampling groundwater at multiple depths with a single deployment. Attached Figure Description

[0014] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the optimal embodiment of a groundwater recharge sampling device of the present invention;

[0016] Figure 2 This is a schematic diagram of the structure of the partition of a sampling device for groundwater recharge according to the present invention;

[0017] Figure 3 This is a schematic diagram of the structure of a hemispherical mesh cover for a groundwater recharge sampling device according to the present invention;

[0018] Figure 4 This is a schematic diagram of the adjusting screw of a groundwater recharge sampling device according to the present invention;

[0019] Figure 5 This is a schematic diagram of the cable support structure of a groundwater recharge sampling device according to the present invention;

[0020] Figure 6 This is a schematic diagram of the central screw of a groundwater recharge sampling device according to the present invention;

[0021] Figure 7 This is a schematic diagram of the top rod of a sampling device for groundwater recharge according to the present invention.

[0022] Reference numerals: 1. Sampling cylinder; 2. Partition plate; 3. Inlet pipe; 4. Cable protection mechanism; 5. Centering mechanism; 6. Drain pipe; 7. One-way valve plate; 8. Fixed bracket; 9. Support rod; 10. Cable bracket; 11. Connecting rod; 12. Ring seat; 13. Positioning rod; 14. Central support; 15. Guide rod; 16. Compression spring; 17. Compression head; 18. Adjusting screw; 19. Hemispherical mesh cover; 20. Hinge seat; 21. Bent rod; 22. Positioning ring; 23. Pin; 24. Central screw; 25. Push plate; 26. Nut sleeve; 27. Top rod. Detailed Implementation

[0023] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] The concepts involved in this application will first be described with reference to the accompanying drawings. It should be noted that the following descriptions of various concepts are only for the purpose of making the content of this application easier to understand and do not constitute a limitation on the scope of protection of this application; furthermore, the embodiments and features in the embodiments of this application can be combined with each other unless otherwise specified. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0025] like Figures 1 to 7 As shown, the present invention provides an embodiment of a sampling device for groundwater recharge, including a sampling cylinder 1, which is divided into liquid storage chambers by multiple partitions 2. It also includes an inlet pipe 3, a cable protection mechanism 4, and a centering mechanism 5. Multiple inlet pipes 3 are provided corresponding to the liquid storage chambers and are connected to the top of the liquid storage chambers. Each liquid storage chamber is provided with a drain pipe 6 at the bottom, and the sample in the liquid storage chamber can be taken out from the drain pipe 6. Each inlet pipe 3 is equipped with a sealing mechanism, which includes a one-way valve plate 7 that can be opened into the sampling cylinder 1.

[0026] The sealing mechanism also includes a central support 14, a guide rod 15, and a compression spring 16. The central support 14 is fixed inside the inlet pipe 3. The guide rod 15 is slidably mounted on the central support 14 and is coaxial with the inlet pipe 3. The center of the one-way valve plate 7 is fixedly connected to the guide rod 15. The other end of the guide rod 15 is connected to a compression head 17. The compression spring 16 is sleeved on the guide rod 15. The two ends of the compression spring 16 abut against the compression head 17 and the central support 14, respectively. The one-way valve plate 7 is pressed against the inlet of the inlet pipe 3 by the elastic force provided by the compression spring 16.

[0027] An adjusting screw 18 is fixed at the center of the clamping head 17. The adjusting screw 18 is inserted into the guide rod 15 and threadedly connected to the guide rod 15.

[0028] A hemispherical mesh cover 19 is installed at one end of the inlet pipe 3 outside the sampling cylinder 1. The hemispherical mesh cover 19 is threadedly connected to the inlet pipe 3. When groundwater enters the inlet pipe 3, the water flow can be filtered through the hemispherical mesh cover 19 to prevent large pieces of mud and sand from clogging the inlet pipe 3. At the same time, the hemispherical mesh cover 19 can also be removed to clean the inside of the inlet pipe 3.

[0029] The working principle of the sealing mechanism is as follows: Before sampling groundwater at different depths, the hemispherical mesh cover 19 is first removed. Then, the clamping head 17 and adjusting screw 18 are rotated to move the clamping head 17 closer to or further away from the central support 14. When the clamping head 17 is closer to the central support 14, the compressed length of the clamping spring 16 increases, strengthening the elastic force provided by the clamping spring 16, which in turn increases the tension on the one-way valve plate 7. At this time, a greater water pressure is required to open the one-way valve plate 7. When the clamping head 17 is further away from the central support 14, the compressed length of the clamping spring 16 decreases, reducing the elastic force provided by the clamping spring 16. This reduces the tension on the one-way valve plate 7, allowing it to open with less water pressure. Therefore, when sampling groundwater at greater depths, tightening the adjusting screw 18 increases the tension on the one-way valve plate 7, ensuring it can only be opened by water pressure after reaching a certain depth, thus enabling sampling of groundwater at deeper locations. When sampling groundwater at shallower locations, loosening the adjusting screw 18 reduces the tension on the one-way valve plate 7. After sampling, the pressure inside and outside the storage chamber is balanced, and the compression spring 16 resets the one-way valve plate 7 to seal the inlet pipe 3, preventing the sample from spilling out of the storage chamber.

[0030] Furthermore, the sampling cylinder 1 is equipped with multiple liquid storage chambers, which are stacked vertically. Each liquid storage chamber is equipped with an inlet pipe 3 and a sealing mechanism at its top. Therefore, before sampling, the pressure of the one-way valve plates 7 of the multiple sealing mechanisms is adjusted to gradually increase the pressure of the one-way valve plates 7 from top to bottom. Then, the sampling cylinder 1 is dropped into the wellhead. When the sampling cylinder 1 descends to different water depths, different one-way valve plates 7 can be opened to collect samples, achieving the effect of sampling groundwater at multiple depths with a single deployment.

[0031] The cable protection mechanism 4 includes a fixed bracket 8, a support rod 9, and a cable bracket 10. The fixed bracket 8 is installed at the wellhead, and the cable bracket 10 is fixed to the fixed bracket 8 by the support rod 9. The cable bracket 10 is aligned with the center of the wellhead and is used to guide the cable.

[0032] Three hinge seats 20 are installed at equal intervals on the fixed bracket 8. A bent rod 21 is installed on the hinge seat 20. The bent part of the bent rod 21 is rotatably connected to the hinge seat 20. A positioning ring 22 is rotatably installed on the upper end of the bent rod 21. A pin 23 is slidably connected inside the positioning ring 22.

[0033] The fixed bracket 8 has a notch, and the cable bracket 10 has a planar spiral structure, so that the cable can slide from the outer ring of the cable bracket 10 along the spiral opening of the cable bracket 10 into the center of the cable bracket 10.

[0034] When taking samples, first place the sampling tube 1 into the well, then move the cable from the gap to the outer ring of the cable bracket 10, and then slide the cable into the center of the cable bracket 10. The cable bracket 10 can then limit the cable and prevent the cable from rubbing against the well wall.

[0035] The centering mechanism 5 includes a connecting rod 11, a ring seat 12, and a positioning rod 13. The ring seat 12 is fixed to the bottom of the sampling cylinder 1 by the connecting rod 11. The positioning rod 13 is installed on the ring seat 12, and the end of the positioning rod 13 near the outer ring of the ring seat 12 can abut against the inner wall of the well.

[0036] The centering mechanism 5 also includes a central screw 24, a push plate 25, a nut sleeve 26, and multiple push rods 27. The multiple push rods 27 are fixed at equal intervals on the upper surface of the push plate 25. The push plate 25 is slidably sleeved on the central screw 24. The nut sleeve 26 is rotatably installed on the bottom of the push plate 25 and threadedly connected to the central screw 24. The central screw 24 is fixed to the bottom of the sampling cylinder 1. The diameter of the push plate 25 is smaller than the inner diameter of the ring seat 12. The positioning rod 13 is rotatably connected to the ring seat 12. The end of the positioning rod 13 near the inner ring of the ring seat 12 is slidably connected to the push rod 27.

[0037] The working principle of the centering mechanism 5 is as follows: When the sampling cylinder 1 needs to be placed into wells of different diameters, the nut sleeve 26 is rotated, causing the nut sleeve 26 to drive the push plate 25 to move up and down. The push plate 25 moves up and down, causing the push rod 27 to move up and down. When the three push rods 27 move, they can drive one end of the three positioning rods 13 to rotate around the hinge between the positioning rod 13 and the ring seat 12. Then, through the lever action, the other end of the three positioning rods 13 is brought closer to or away from the center of the sampling cylinder 1, realizing the synchronous tightening or synchronous unfolding of the three positioning rods 13. When the diameter of the well is large, the nut sleeve 26 is rotated to unfold the three positioning rods 13 synchronously. When the diameter of the well is small, the nut sleeve 26 is rotated to tighten the three positioning rods 13 synchronously. That is, the positioning rods 13 limit the center screw 24 and the sampling cylinder 1, keeping the sampling cylinder 1 at the center of the well and preventing the sampling cylinder 1 from colliding with the well wall.

[0038] This document uses specific examples to illustrate the principles and implementation methods of this application. The descriptions of the above embodiments are only for the purpose of helping to understand the methods and core ideas of this application. The above are only preferred embodiments of this application. It should be noted that due to the limitations of textual expression, while there are objectively infinite specific structures, those skilled in the art can make several improvements, modifications, or changes without departing from the principles of this application, and can also combine the above technical features in an appropriate manner. These improvements, modifications, changes, or combinations, or the direct application of the inventive concept and technical solution to other situations without modification, should all be considered within the scope of protection of this application.

Claims

1. A sampling device for groundwater recharge, comprising a sampling cylinder (1), the sampling cylinder (1) is divided into liquid storage cavities by a plurality of partitions (2), characterized in that: Also include the liquid inlet pipe (3), cable protection mechanism (4) and centering mechanism (5), the liquid inlet pipe (3) with the liquid storage cavity one-to-one correspondence is provided with multiple and communicates with the top of the liquid storage cavity, the bottom of each liquid storage cavity is provided with a liquid discharge pipe (6), each liquid inlet pipe (3) is installed with a pipe sealing mechanism, the pipe sealing mechanism includes a one-way valve plate (7), the one-way valve plate (7) can open to the inside of the sampling cylinder (1); The cable protection mechanism (4) includes a fixed support (8), a support rod (9) and a cable support (10), the fixed support (8) is installed at the wellhead, the cable support (10) is fixed on the fixed support (8) through the support rod (9), the cable support (10) is arranged in alignment with the center of the wellhead, and the cable support (10) is used for guiding the cable. The centering mechanism (5) includes a connecting rod (11), a ring seat (12) and a positioning rod (13), the ring seat (12) is fixed on the bottom of the sampling cylinder (1) through the connecting rod (11), and the positioning rod (13) is installed on the ring seat (12). The end of the positioning rod (13) close to the outer circle of the ring seat (12) can abut against the inner wall of the well.

2. A sampling device for groundwater recharge as claimed in claim 1, wherein: The pipe sealing mechanism further includes a center support (14), a guide rod (15) and a compression spring (16), the center support (14) is fixed in the liquid inlet pipe (3), the guide rod (15) is slidingly installed on the center support (14) and coaxially arranged with the liquid inlet pipe (3), the center of the one-way valve plate (7) is fixedly connected with the guide rod (15), the other end of the guide rod (15) is connected with a compression head (17), and the compression spring (16) is sleeved on the guide rod (15). The two ends of the compression spring (16) respectively abut against the compression head (17) and the center support (14).

3. A sampling device for groundwater recharge as claimed in claim 2, wherein: The center of the compression head (17) is fixedly connected with an adjusting screw (18), the adjusting screw (18) is inserted into the guide rod (15) and threadedly connected with the guide rod (15).

4. A sampling device for groundwater recharge according to claim 3, characterised in that: One end of the liquid inlet pipe (3) located outside the sampling cylinder (1) is also provided with a hemispherical mesh cover (19), and the hemispherical mesh cover (19) is threadedly connected with the liquid inlet pipe (3).

5. The groundwater recharge sampling device of claim 1, wherein: Three hinged seats (20) are equidistantly installed on the fixed support (8), a bent rod (21) is installed on the hinged seat (20), the bent part of the bent rod (21) is rotationally connected with the hinged seat (20), the upper end of the bent rod (21) is rotationally installed with a positioning ring (22), and the positioning ring (22) is slidingly connected with a pin (23) in the positioning ring (22).

6. A sampling device for groundwater recharge as claimed in claim 1, wherein: A notch is formed in the fixed support (8), the cable support (10) is a planar spiral structure, and the cable can slide into the center of the cable support (10) from the outer circle of the cable support (10) along the spiral opening of the cable support (10).

7. A sampling device for groundwater recharge as claimed in claim 1, wherein: The centering mechanism (5) further comprises a center screw (24), a push disc (25), a nut sleeve (26) and a plurality of jacks (27), the plurality of jacks (27) are fixed at equal intervals on the upper surface of the push disc (25), the push disc (25) is sleeved on the center screw (24) in a sliding mode, the nut sleeve (26) is rotatably installed at the bottom of the push disc (25) and is in threaded connection with the center screw (24), the center screw (24) is fixed at the bottom of the sampling cylinder (1), the diameter of the push disc (25) is smaller than the inner diameter of the ring seat (12), the positioning rod (13) is rotatably connected with the ring seat (12), and one end of the positioning rod (13) close to the inner ring of the ring seat (12) is in sliding connection with the jacks (27).

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