Sampling device for underground water recharge

Abstract

The invention relates to the technical field of underground water sampling, in particular to a sampling device for underground water recharge, which comprises a sampling barrel, the sampling barrel is internally divided by a plurality of partition plates to form liquid storage cavities, a plurality of liquid inlet pipes are arranged in one-to-one correspondence with the liquid storage cavities and are communicated with the tops of the liquid storage cavities, and liquid discharge pipes are arranged at the bottoms of the liquid storage cavities. A pipe sealing mechanism is mounted on each liquid inlet pipe and comprises a one-way valve plate; the cable protection mechanism comprises a fixing support, and the cable support is fixed to the fixing support through a supporting rod. The centering mechanism comprises a connecting rod, a ring seat is fixed at the bottom of the sampling barrel through the connecting rod, and a positioning rod is mounted on the ring seat. Before underground water with different depths is sampled, the one-way valve plate is adjusted to ensure that the one-way valve plate can be opened by water pressure after reaching a certain depth, sampling of underground water at a deeper position is achieved, after sampling is completed, pressure inside and outside the liquid storage cavity is balanced, the one-way valve plate is reset to seal the liquid inlet pipe, and a sample in the liquid storage cavity is prevented from spilling out.

Description

Technical Field

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

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

[0003] Most existing sampling devices for groundwater recharge are installed by mounting a bracket at the wellhead and then lowering the sampling device. Therefore, there are the following defects: 1. The sampling device may not reach the specified depth of the groundwater layer, resulting in the sampling water source not being the groundwater at the target depth, thus affecting the accuracy of sampling. 2. Some sampling devices often lower the sampler into the pipeline by hanging a cable. During the sampling process, the sampler is prone to shaking, causing the sampler to collide with the inner wall of the pipeline, affecting the sampling, and causing the cable to shake, become tangled, or even be damaged. Summary of the invention

[0004] The technical problem to be solved by the present invention is: in order to solve the problem that the sampler is difficult to stably reach the specified depth for sampling during the process of retracting and releasing, the present invention provides a sampling device for groundwater reinjection to solve the above problem. The technical solution adopted by the present invention to solve the technical problem is: a sampling device for groundwater reinjection, comprising a sampling barrel, wherein a liquid storage cavity is formed by a plurality of partitions in the sampling barrel, and further comprising a liquid inlet pipe, a cable protection mechanism and a centering mechanism, wherein a plurality of liquid inlet pipes are arranged in a one-to-one correspondence with the liquid storage cavity and are communicated with the top of the liquid storage cavity, a liquid discharge pipe is arranged at the bottom of each liquid storage cavity, and a pipe sealing mechanism is installed on each liquid inlet pipe, wherein the pipe sealing mechanism comprises a one-way valve plate, and the one-way valve plate can be opened to the inside of the sampling barrel; the cable protection mechanism comprises a fixed bracket, a support rod and a cable bracket, wherein the fixed bracket is installed at a wellhead, the cable bracket is fixed on the fixed bracket by the support rod, the cable bracket is aligned to the center of the wellhead, and the cable bracket is used to guide the cable; the centering mechanism comprises a connecting rod, a ring seat and a positioning rod, wherein the ring seat is fixed to the bottom of the sampling barrel by the connecting rod, the positioning rod is installed on the ring seat, and one end of the positioning rod close to the outer ring of the ring seat can abut against the inner wall of the well. Preferably, the tube sealing mechanism also includes a center bracket, a guide rod and a compression spring, the center bracket is fixed in the liquid inlet pipe, the guide rod is slidably mounted on the center bracket and is coaxially arranged with the liquid 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 the two ends of the compression spring are respectively abutted against the compression head and the center bracket.

[0005] Preferably, an adjusting screw is fixed at the center of the pressing head, and the adjusting screw is inserted into the guide rod and threadedly connected to the guide rod.

[0006] Preferably, a hemispherical mesh cover is installed at one end of the liquid inlet tube located outside the sampling tube, and the hemispherical mesh cover is threadedly connected to the liquid inlet tube.

[0007] Preferably, three hinge seats are installed at equal intervals on the fixed bracket, and a bent rod is installed on the hinge seat. The bent portion 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, and a pin is slidably connected inside the positioning ring.

[0008] Preferably, a notch is provided on the fixing bracket, and the cable bracket is 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.

[0009] Preferably, the centering mechanism also includes a center screw, a push plate, a nut sleeve and a plurality of push rods, wherein the plurality of push rods are fixed at equal intervals on the upper surface of the push plate, the push plate sliding sleeve is arranged on the center screw, the nut sleeve is rotatably mounted on the bottom of the push plate and is threadedly connected to the center screw, the center screw is fixed to the bottom of the sampling tube, 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, and the end of the positioning rod close to the inner ring of the ring seat is slidably connected to the push rod.

[0010] The beneficial effect of the present invention is that a pipe sealing mechanism is provided. 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, thereby realizing the sampling of groundwater at a deeper location. When sampling groundwater at a shallower location, the tension on the one-way valve plate can be reduced. After the sampling is completed, the pressure inside and outside the liquid storage chamber is balanced, and the one-way valve plate is reset to seal the liquid inlet pipe to prevent the sample in the liquid storage chamber from spilling out.

[0011] In addition, a plurality of liquid storage chambers are arranged in the sampling barrel, and the plurality of liquid storage chambers are stacked in a vertical direction. A liquid inlet pipe and a tube sealing mechanism are installed on the top of each liquid storage chamber. Therefore, before sampling, the pressure of the one-way valve plates of the plurality of tube sealing mechanisms is adjusted respectively, so that the pressure of the plurality of one-way valve plates gradually increases from top to bottom. Then the sampling barrel is put into the wellhead. When the sampling barrel descends to different water depths, different one-way valve plates can be opened for sampling, thereby achieving the effect of sampling groundwater at multiple depths with one drop. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the implementation methods of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the implementation methods or the description of the prior art. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0013] Figure 1 It is a structural schematic diagram of a best embodiment of a sampling device for groundwater recharge of the present invention; Figure 2 It is a schematic structural diagram of a partition of a sampling device for groundwater recharge of the present invention; Figure 3 It is a schematic structural diagram of a hemispherical mesh cover of a sampling device for groundwater recharging of the present invention; Figure 4 It is a structural schematic diagram of an adjusting screw rod of a sampling device for groundwater recharge of the present invention; Figure 5 It is a schematic structural diagram of a cable support of a groundwater recharge sampling device of the present invention; Figure 6 It is a structural schematic diagram of a central screw rod of a sampling device for groundwater recharge of the present invention; Figure 7 The present invention is a schematic structural diagram of a top rod of a sampling device for groundwater recharge.

[0014] Figure numerals: 1. sampling cylinder; 2. partition; 3. liquid inlet pipe; 4. cable protection mechanism; 5. centering mechanism; 6. discharge 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. center bracket; 15. guide rod; 16. clamping spring; 17. clamping head; 18. adjusting screw; 19. hemispherical mesh cover; 20. hinged seat; 21. bent rod; 22. positioning ring; 23. pin; 24. center screw; 25. push plate; 26. nut sleeve; 27. push rod. DETAILED DESCRIPTION

[0015] 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.

[0016] The following first describes the concepts involved in the present application in conjunction with the accompanying drawings. It should be noted that the following description of each concept is only to make the content of the present application easier to understand, and does not limit the scope of protection of the present application; at the same time, the embodiments and features in the embodiments of the present application can be combined with each other in the absence of conflict. The present application will be described in detail with reference to the accompanying drawings and in conjunction with the embodiments.

[0017] like Figures 1 to 7 As shown, the present invention provides an embodiment of a sampling device for groundwater recharge, including a sampling tube 1, wherein the sampling tube 1 is divided into a liquid storage chamber by a plurality of partitions 2, and further includes a liquid inlet pipe 3, a cable protection mechanism 4 and a centering mechanism 5, wherein a plurality of liquid inlet pipes 3 are arranged in a one-to-one correspondence with the liquid storage chamber and are connected to the top of the liquid storage chamber, a liquid discharge pipe 6 is arranged at the bottom of each liquid storage chamber, and the sample in the liquid storage chamber can be taken out from the liquid discharge pipe 6, and a pipe sealing mechanism is installed on each liquid inlet pipe 3, and the pipe sealing mechanism includes a one-way valve plate 7, and the one-way valve plate 7 can be opened toward the inside of the sampling tube 1.

[0018] The pipe sealing mechanism also includes a central bracket 14, a guide rod 15 and a clamping spring 16. The central bracket 14 is fixed in the liquid inlet pipe 3. The guide rod 15 is slidably mounted on the central bracket 14 and is coaxially arranged with the liquid 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 clamping head 17. The clamping spring 16 is sleeved on the guide rod 15. The two ends of the clamping spring 16 are respectively in contact with the clamping head 17 and the central bracket 14. The elastic force provided by the clamping spring 16 causes the one-way valve plate 7 to be clamped at the pipe mouth of the liquid inlet pipe 3.

[0019] An adjusting screw 18 is fixed at the center of the pressing head 17 . The adjusting screw 18 is inserted into the guide rod 15 and is threadedly connected to the guide rod 15 .

[0020] A hemispherical mesh cover 19 is also installed at one end of the liquid inlet pipe 3 located outside the sampling tube 1. The hemispherical mesh cover 19 is threadedly connected to the liquid inlet pipe 3. When groundwater enters the liquid 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 liquid inlet pipe 3. At the same time, the hemispherical mesh cover 19 can also be removed to clean the inside of the liquid inlet pipe 3.

[0021] The working principle of the pipe sealing mechanism is: before sampling groundwater at different depths, first remove the hemispherical mesh cover 19, then rotate the clamping head 17 and the adjusting screw 18 to make the clamping head 17 close to or away from the center bracket 14. When the clamping head 17 is close to the center bracket 14, the compressed length of the clamping spring 16 becomes larger, so that the elastic force provided by the clamping spring 16 is enhanced, thereby increasing 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 away from the center bracket 14, the compressed length of the clamping spring 16 becomes smaller, so that the elastic force provided by the clamping spring 16 is reduced, and the one-way valve plate 7 is opened. This reduces the pulling force on the one-way valve plate 7, and a smaller water pressure can open the one-way valve plate 7. Therefore, when it is necessary to sample groundwater at a deeper depth, tighten the adjusting screw 18 to increase the pulling force on the one-way valve plate 7, which can ensure that the one-way valve plate 7 can be opened by water pressure only after it reaches a certain depth, thereby achieving sampling of groundwater at a deeper location. When sampling groundwater at a shallower location, loosen the adjusting screw 18 to reduce the pulling force on the one-way valve plate 7. After sampling is completed, the pressure inside and outside the liquid storage chamber is balanced, and the compression spring 16 drives the one-way valve plate 7 to reset and seal the liquid inlet pipe 3 to prevent the sample in the liquid storage chamber from spilling out.

[0022] In addition, a plurality of liquid storage chambers are arranged in the sampling tube 1, and the plurality of liquid storage chambers are stacked in the vertical direction. A liquid inlet pipe 3 and a tube sealing mechanism are installed on the top of each liquid storage chamber. Therefore, before sampling, the pressure of the one-way valve plates 7 of the multiple tube sealing mechanisms is adjusted respectively, so that the pressure of the multiple one-way valve plates 7 gradually increases from top to bottom, and then the sampling tube 1 is put into the wellhead. When the sampling tube 1 descends to different water depths, different one-way valve plates 7 can be opened for sampling, thereby achieving the effect of sampling groundwater at multiple depths in one drop.

[0023] 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. The cable bracket 10 is fixed to the fixed bracket 8 through the support rod 9. The cable bracket 10 is aligned to the center of the wellhead and is used to guide the cable.

[0024] Three hinge seats 20 are installed at equal intervals on the fixed bracket 8, and a bent rod 21 is installed on the hinge seat 20. The bent portion 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, and a pin 23 is slidably connected inside the positioning ring 22.

[0025] A notch is provided on the fixing bracket 8 , and the cable bracket 10 is 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 .

[0026] When sampling, first put the sampling tube 1 into the well, then move the cable from the notch to the outer ring of the cable holder 10, and then slide the cable into the center of the cable holder 10. The cable holder 10 can limit the cable to prevent friction between the cable and the well wall.

[0027] 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 tube 1 through the connecting rod 11. The positioning rod 13 is installed on the ring seat 12. One 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. The centering mechanism 5 also includes a central screw 24, a push plate 25, a nut sleeve 26 and a plurality of push rods 27. The plurality of 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 mounted on the bottom of the push plate 25 and is threadedly connected to the central screw 24. The central screw 24 is fixed to the bottom of the sampling tube 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 close to the inner circle of the ring seat 12 is slidably connected to the push rod 27.

[0028] The working principle of the centering mechanism 5 is as follows: when the sampling tube 1 needs to be placed in wells of different diameters, the nut sleeve 26 is rotated to make the nut sleeve 26 drive the push plate 25 to move up and down, and the push plate 25 moves up and down to drive 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 along the hinge between the positioning rod 13 and the ring seat 12 as the axis, and then through the lever action, the other ends of the three positioning rods 13 are made close to or away from the center of the sampling tube 1, so as to realize the synchronous tightening or synchronous expansion of the three positioning rods 13. When the diameter of the well is larger, the nut sleeve 26 is rotated to expand the three positioning rods 13 synchronously, and when the diameter of the well is smaller, the nut sleeve 26 is rotated to tighten the three positioning rods 13 synchronously, that is, the center screw 24 and the sampling tube 1 are limited by the positioning rod 13, so that the sampling tube 1 is kept in the center of the well to prevent the sampling tube 1 from colliding with the well wall.

[0029] This article uses specific examples to illustrate the principles and implementation methods of this application. The description of the above embodiments is only used to help understand the method and its core ideas of this application. The above are only preferred implementation methods of this application. It should be pointed out that due to the limitations of textual expression and the objective existence of infinite specific structures, ordinary technicians in this technical field 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 concept and technical solution of the invention to other occasions without improvement, should be regarded as the scope of protection of this application.

Claims

1. A sampling device for groundwater recharge, comprising a sampling tube (1), wherein the sampling tube (1) is divided into liquid storage chambers by a plurality of partitions (2), and characterized in that: It also comprises a liquid inlet pipe (3), a cable protection mechanism (4) and a centering mechanism (5), wherein a plurality of the liquid inlet pipes (3) are arranged in a one-to-one correspondence with the liquid storage chambers and are communicated with the top of the liquid storage chambers, a liquid discharge pipe (6) is arranged at the bottom of each liquid storage chamber, and a pipe sealing mechanism is installed on each of the liquid inlet pipes (3), wherein the pipe sealing mechanism comprises a one-way valve plate (7), and the one-way valve plate (7) can be opened toward the interior of the sampling tube (1); The cable protection mechanism (4) comprises a fixed bracket (8), a support rod (9) and a cable bracket (10); the fixed bracket (8) is installed at the wellhead; the cable bracket (10) is fixed to the fixed bracket (8) via the support rod (9); the cable bracket (10) is aligned with the center of the wellhead; and the cable bracket (10) is used to guide the cable; The centering mechanism (5) comprises 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 tube (1) via the connecting rod (11); the positioning rod (13) is mounted on the ring seat (12); and one end of the positioning rod (13) close to the outer ring of the ring seat (12) can abut against the inner wall of the wellbore.

2. A groundwater recharge sampling device as claimed in claim 1, characterized in that: The tube sealing mechanism further comprises a central support (14), a guide rod (15) and a compression spring (16); the central support (14) is fixed in the liquid inlet pipe (3); the guide rod (15) is slidably mounted on the central support (14) and is coaxially arranged with the liquid 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); and the two ends of the compression spring (16) are respectively in contact with the compression head (17) and the central support (14).

3. A groundwater recharge sampling device as claimed in claim 2, characterized in that: An adjusting screw (18) is fixed at the center of the pressing head (17), and the adjusting screw (18) is inserted into the guide rod (15) and is threadedly connected to the guide rod (15).

4. A groundwater recharge sampling device as claimed in claim 3, characterized in that: A hemispherical mesh cover (19) is also installed at one end of the liquid inlet pipe (3) located outside the sampling tube (1), and the hemispherical mesh cover (19) is threadedly connected to the liquid inlet pipe (3).

5. A groundwater recharge sampling device as claimed in claim 1, characterized in that: Three hinge seats (20) are installed on the fixed bracket (8) at equal intervals, and a bent rod (21) is installed on the hinge seat (20). The bent portion of the bent rod (21) is rotatably connected to the hinge seat (20), and a positioning ring (22) is rotatably installed on the upper end of the bent rod (21), and a pin (23) is slidably connected inside the positioning ring (22).

6. A groundwater recharge sampling device as claimed in claim 1, characterized in that: The fixing bracket (8) is provided with a notch, and the cable bracket (10) is 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).

7. A groundwater recharge sampling device as claimed in claim 1, characterized in that: The centering mechanism (5) further comprises a central screw (24), a push plate (25), a nut sleeve (26) and a plurality of push rods (27), wherein the plurality of 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 mounted on the bottom of the push plate (25) and is threadedly connected to the central screw (24), the central screw (24) is fixed to the bottom of the sampling tube (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), and one end of the positioning rod (13) close to the inner ring of the ring seat (12) is slidably connected to the push rod (27).

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