A sampling device for water quality monitoring that is convenient for sampling at different depths

Abstract

The present invention discloses a sampling device for water quality monitoring that is convenient for sampling at different depths, including a floating plate, a buckle, a plugging cover, a drawstring and a sealing pad, a lap hole is provided on the right side of the floating plate, a connecting groove and an inner groove are provided inside the floating plate, and a lap groove is provided on the upper surface of the floating plate, a spray hole is provided on the inner surface of the floating plate, a docking plate is placed inside the lap groove, a connecting rod is fixedly connected below the docking plate, and an outer pipe sleeve is fixedly connected below the connecting rod, an opening is provided on the surface of the outer pipe sleeve, and a rotating groove is provided on the left side of the outer pipe sleeve. The sampling device for water quality monitoring that is convenient for sampling at different depths can adjust the amount of a single sample by cooperating with a threaded internal connection block through the opening on the device, and can perform adjustable sampling at different depths, thereby improving the practicability of the device, and can also perform sufficient cleaning through the spray hole on the device.

Description

Technical Field

[0001] The invention relates to the technical field of water quality detection, in particular to a sampling device for water quality monitoring that is convenient for sampling at different depths. Background Art

[0002] Water quality testing mainly involves extracting and testing the water quality in rivers, and observing the pollution in rivers by testing the samples taken. Therefore, in the process of water quality monitoring, a sampling device is needed to perform sampling work. The sampling device is usually composed of a pipe and a seal and cover. The water quality monitoring sampling work is completed by extending the pipe into the water area that needs to be monitored, closing the cover and taking out the entire pipe.

[0003] Some water quality monitoring sampling devices currently on the market:

[0004] (1) In the process of sampling, sampling is usually only carried out at a fixed position, which is not convenient for stratified sampling, and the use effect is poor. In addition, it is not convenient to adjust the sampling volume of a certain depth of water body during use, and the adjustability is poor;

[0005] (2) When sampling in some seriously polluted waters, some impurities are easily attached to the outer surface of some existing water quality monitoring sampling devices, which makes it difficult to clean the outer surface of the sampling device in time after sampling. The impurities on the outer surface can easily affect the accuracy of sampling and the accuracy of subsequent sampling work;

[0006] Therefore, we propose a water quality monitoring sampling device that is convenient for sampling at different depths, so as to solve the above-mentioned problems. Summary of the invention

[0007] The purpose of the present invention is to provide a water quality monitoring sampling device that is convenient for sampling at different depths, so as to solve the problem raised by the above background technology that some water quality monitoring sampling devices currently on the market are not convenient for adjusting the sampling amount of a water body at a certain depth, and it is not convenient to fully clean the outer surface during the sampling process.

[0008] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a sampling device for water quality monitoring that is convenient for sampling at different depths, comprising a floating plate, a buckle, a plugging cover, a drawstring and a sealing gasket, a lap hole is provided on the right side of the floating plate, a connecting groove and an inner groove are provided inside the floating plate, and a lap groove is provided on the upper surface of the floating plate, a spray hole is provided on the inner surface of the floating plate, a docking plate is placed inside the lap groove, a connecting rod is fixedly connected below the docking plate, and an outer pipe sleeve is fixedly connected below the connecting rod, an opening is provided on the surface of the outer pipe sleeve, a rotating groove is provided on the left side of the outer pipe sleeve, and an inner connecting rod is movably installed inside the rotating groove, and the inner A baffle is fixedly connected to the side of the connecting rod, and the upper surface, lower surface and right surface of the baffle are fixedly connected to the extrusion pad, and the outer surface of the baffle is fixedly provided with a buckle ring, a sliding groove is opened on the rear side of the outer tube sleeve, and a slider is movably installed inside the sliding groove, and a lap plate is fixedly provided on the surface of the slider, an inner connection block is movably installed inside the outer tube sleeve, and a fixing rod is fixedly provided on the surface of the inner connection block, a first groove and a second groove are opened on the inner wall of the front end opening of the outer tube sleeve, and an air vent is opened on the side of the outer tube sleeve, and a blocking cover is movably installed inside the air vent, a draw rope is fixedly connected to the inside of the blocking cover, and a sealing gasket is fixedly installed on the outside of the blocking cover.

[0009] Preferably, the central axis of the floating plate and the central axis of the docking plate are on the same straight line, the floating plate is in a circular ring shape, and the inner diameter of the floating plate is greater than the diameter of the outer sleeve.

[0010] Preferably, the overlapping holes, the connecting grooves, the inner grooves and the spray holes are interconnected, and the inner grooves are in a circular ring shape, and the spray holes are distributed in a centrally symmetrical manner on the surface of the floating plate.

[0011] Preferably, the docking plate, the connecting rod and the outer sleeve are an integrated structure, the diameter of the docking plate is larger than the inner diameter of the floating plate, and the outer wall of the docking plate and the inner wall of the overlapping groove are in contact with each other.

[0012] Preferably, the openings are distributed at equal intervals on the surface of the outer sleeve, and there is a one-to-one correspondence between the openings and the baffles, and the fixing rods are symmetrically distributed on the upper and lower sides of the openings.

[0013] Preferably, the inner wall of the rotating groove and the outer wall of the inner connecting rod are matched with each other, and the inner connecting rod is a cylinder with a cut surface, and the central axis of the inner connecting rod is located inside the rotating groove.

[0014] Preferably, the inner connecting rod, baffle, extrusion pad and buckle are an integral whole, and the baffle is in the shape of a semicircular ring, and the baffle forms a rotating structure with the outer sleeve through the inner connecting rod and the rotating groove, and the extrusion pad is made of rubber.

[0015] Preferably, the slider forms a snap-fit ​​structure with the outer tube sleeve through the slide groove, and the slide groove and the lap plate are both arc-shaped, and the lap plate forms a sliding structure with the outer tube sleeve through the slider and the slide groove.

[0016] Preferably, the slider on the lap plate corresponds to the slide groove inside the outer tube sleeve, the baffle forms a transmission structure with the outer tube sleeve through the lap plate and the buckle, and the outer tube sleeve and the inner connection block are threadedly connected, and the upper end of the lap plate passes through the interior of the docking plate.

[0017] Preferably, the depth of the first groove on the surface of the outer sleeve is greater than the depth of the second groove on the surface of the outer sleeve, and the baffle forms a clamping structure with the outer sleeve through the first groove and the extrusion pad.

[0018] Preferably, the shape of the longitudinal section of the sealing gasket is semicircular, and the sealing gaskets are evenly distributed on the outside of the plugging cover, and the length of the plugging cover is greater than the thickness of the outer pipe sleeve.

[0019] Compared with the prior art, the present invention has the following beneficial effects: the sampling device for water quality monitoring that is convenient for sampling at different depths:

[0020] (1) The device is provided with openings distributed at equal intervals, and water bodies of different depths can be sampled through the openings on the surface of the outer tube sleeve, thereby improving the use effect of the device. In addition, an internal block is also provided inside the outer tube sleeve, and the position of the internal block inside the device can be adjusted by rotating the square fixing rod under the internal block, thereby adjusting the size of a single sampling amount, thereby improving the adjustability of the device. The device can also form a snap-fit ​​structure by forming a baffle plate corresponding to the opening one by one with the arc-shaped overlap plate on the rear side of the device, thereby closing the baffle plate, thereby improving the use effect of the device. By closing the baffle plate, the extrusion pad on the surface of the baffle plate can be stuck into the inside of the first groove, thereby ensuring the overall sealing of the device;

[0021] (2) A floating plate is provided at the top of the device, which can be placed on the water surface, and then the device as a whole is pressed down to completely immerse the opening in the water, so that the device can be used for sampling. When sampling, the baffles at various locations can be adjusted simultaneously by moving the through-type overlap plate inside the docking plate, thereby improving the convenience of using the device;

[0022] (3) The inner wall of the floating plate of the device is provided with spray holes which are symmetrically distributed in the center, and a water pipe and a water pump are connected to the overlapping holes. The spray holes can be used in conjunction with the overlapping holes, the connecting grooves and the inner grooves connected thereto to fully clean the outer surface of the device. When sampling is carried out in some waters with poor water quality, the device can be fully cleaned after the sampling device is removed, thereby improving the practicality of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a front cross-sectional structural schematic diagram of the floating plate of the present invention;

[0024] Figure 2 For the present invention Figure 1 Schematic diagram of the structure at A in the middle;

[0025] Figure 3 It is a schematic diagram of the front cross-sectional structure of the outer tube sleeve of the present invention;

[0026] Figure 4 It is a schematic diagram of the overlapping structure of the outer pipe sleeve and the plugging cover of the present invention;

[0027] Figure 5 This is a schematic diagram of the side view structure of the plugging cover of the present invention;

[0028] Figure 6 This is a schematic diagram of the structure of the baffle in the open state of the present invention;

[0029] Figure 7 This is a schematic diagram of the structure of the baffle in the closed state of the present invention;

[0030] Figure 8 For the present invention Figure 7 Schematic diagram of the structure at point B in the middle.

[0031] In the figure: 1, floating plate; 2, overlapping hole; 3, connecting groove; 4, inner groove; 5, overlapping groove; 6, spray hole; 7, docking plate; 8, connecting rod; 9, outer sleeve; 10, opening; 11, rotating groove; 12, inner connecting rod; 13, baffle; 14, extrusion pad; 15, buckle; 16, slide groove; 17, slider; 18, overlapping plate; 19, inner connecting block; 20, fixing rod; 21, first groove; 22, second groove; 23, air vent; 24, plugging cover; 25, pull rope; 26, sealing pad. DETAILED DESCRIPTION

[0032] 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.

[0033] See also Figure 1-8The present invention provides a technical solution: a sampling device for water quality monitoring that is convenient for sampling at different depths, comprising a floating plate 1, a lap hole 2, a connecting groove 3, an inner groove 4, a lap groove 5, a spray hole 6, a docking plate 7, a connecting rod 8, an outer pipe sleeve 9, an opening 10, a rotating groove 11, an inner connecting rod 12, a baffle 13, a squeeze pad 14, a buckle 15, a slide groove 16, a slider 17, a lap plate 18, an inner connecting block 19, a fixing rod 20, a first groove 21, and a second groove 22, vent holes 23, plugging covers 24, pull ropes 25 and sealing pads 26, a lap hole 2 is provided on the right side of the floating plate 1, a connecting groove 3 and an inner groove 4 are provided inside the floating plate 1, a lap groove 5 is provided on the upper surface of the floating plate 1, a spray hole 6 is provided on the inner surface of the floating plate 1, a docking plate 7 is placed inside the lap groove 5, a connecting rod 8 is fixedly connected to the lower part of the docking plate 7, an outer pipe sleeve 9 is fixedly connected to the lower part of the connecting rod 8, and a surface of the outer pipe sleeve 9 is provided with a An opening 10 is provided, and a rotating groove 11 is provided on the left side of the outer tube sleeve 9, and an inner connecting rod 12 is movably installed inside the rotating groove 11, a baffle 13 is fixedly connected to the side of the inner connecting rod 12, and the upper surface, lower surface and right surface of the baffle 13 are fixedly connected with an extrusion pad 14, and a buckle 15 is fixedly provided on the outer surface of the baffle 13, a sliding groove 16 is provided on the rear side of the outer tube sleeve 9, and a slider 17 is movably installed inside the sliding groove 16, and a lap plate 18 is fixedly provided on the surface of the slider 17, an inner connecting block 19 is movably installed inside the outer tube sleeve 9, and a fixing rod 20 is fixedly provided on the surface of the inner connecting block 19, a first groove 21 and a second groove 22 are provided on the inner wall of the front end opening 10 of the outer tube sleeve 9, and an air vent 23 is provided on the side of the outer tube sleeve 9, and a blocking cover 24 is movably installed inside the air vent 23, a pull rope 25 is fixedly connected inside the blocking cover 24, and a sealing gasket 26 is fixedly installed on the outer side of the blocking cover 24.

[0034] The central axis of the floating plate 1 and the central axis of the docking plate 7 are on the same straight line, and the floating plate 1 is in the shape of a circular ring, and the inner diameter of the floating plate 1 is larger than the diameter of the outer tube sleeve 9. The outer tube sleeve 9 can be supported as a whole by the floating plate 1 on the device, which improves the diversity of the use of the device, so that the outer tube sleeve 9 can directly pass through the hole in the middle of the floating plate 1 for sampling, thereby improving the convenience of using the device.

[0035] The overlapping hole 2, the connecting groove 3, the inner groove 4 and the spray hole 6 are interconnected, and the shape of the inner groove 4 is annular. The spray holes 6 are distributed in a centrally symmetrical manner on the surface of the floating plate 1. The spray holes 6 on the device can be used in conjunction with the overlapping hole 2 on the right side of the device to connect the external water pipe to fully clean the surface of the outer pipe sleeve 9, thereby improving the practicability of the device.

[0036] The docking plate 7, connecting rod 8 and outer tube sleeve 9 are an integrated structure, and the diameter of the docking plate 7 is larger than the inner diameter of the floating plate 1, and the outer wall of the docking plate 7 and the inner wall of the overlapping groove 5 fit each other. The docking plate 7 and the overlapping groove 5 on the device can be used to stably place the outer tube sleeve 9, thereby improving the stability of the device during sampling.

[0037] The openings 10 are evenly spaced on the surface of the outer tube sleeve 9, and there is a one-to-one correspondence between the openings 10 and the baffles 13. The fixing rods 20 are symmetrically distributed on the upper and lower sides of the openings 10, and the shape of the fixing rods 20 is a rectangular parallelepiped. Therefore, the position of the internal block 19 inside the outer tube sleeve 9 can be adjusted by rotating the fixing rods 20, thereby improving the adjustability of the device.

[0038] The inner wall of the rotating groove 11 and the outer wall of the inner connecting rod 12 are matched with each other, and the inner connecting rod 12 is a cylinder with a cut surface, and the central axis of the inner connecting rod 12 is located inside the rotating groove 11, so that the inner connecting rod 12 can be stably engaged in the rotating groove 11 and can also rotate within a certain range.

[0039] The inner connecting rod 12, the baffle 13, the squeezing pad 14 and the buckle 15 are an integral whole, and the baffle 13 is in the shape of a semicircular ring, and the baffle 13 forms a rotating structure with the outer tube sleeve 9 through the inner connecting rod 12 and the rotating groove 11. The squeezing pad 14 is made of rubber material, and the squeezing pad 14 can ensure the sealing of the entire device, prevent water from flowing out from the inside of the outer tube sleeve 9, and ensure the integrity of the sampling.

[0040] The slider 17 forms a snap-fitting structure with the outer tube sleeve 9 through the slide groove 16, and the slide groove 16 and the lap plate 18 are both arc-shaped, and the lap plate 18 forms a sliding structure with the outer tube sleeve 9 through the slider 17 and the slide groove 16. The overall position of the lap plate 18 is adjusted through the sliding structure on the device, thereby closing the baffle 13, thereby improving the use effect of the device.

[0041] The slider 17 on the lap plate 18 and the slide groove 16 inside the outer tube sleeve 9 correspond to each other. The baffle 13 forms a transmission structure with the outer tube sleeve 9 through the lap plate 18 and the buckle 15, and the outer tube sleeve 9 and the inner block 19 are threadedly connected. The upper end of the lap plate 18 passes through the interior of the docking plate 7. The lap plate 18 can be operated directly from the top of the device, and all the baffles 13 can be closed by operating the lap plate 18.

[0042] The depth of the first groove 21 on the surface of the outer tube sleeve 9 is greater than the depth of the second groove 22 on the surface of the outer tube sleeve 9. The baffle 13 forms a clamping structure with the outer tube sleeve 9 through the first groove 21 and the compression pad 14, so that after the compression pad 14 moves from the first groove 21 into the interior of the second groove 22, it can fix the baffle 13, thereby improving the sealing effect of the device.

[0043] The shape of the longitudinal section of the sealing gasket 26 is semicircular, and the sealing gasket 26 is evenly spaced outside the plugging cover 24, and the length of the plugging cover 24 is greater than the thickness of the outer tube sleeve 9. When the position of the internal connection block 19 is moved, the plugging cover 24 can be opened by pulling the rope 25 to ensure the constant internal air pressure. At the same time, water can be prevented from entering the cavity formed between two adjacent internal connection blocks 19 and the outer tube sleeve 9, thereby improving the use effect of the device.

[0044] Working principle of this embodiment: When using the water quality monitoring sampling device that is convenient for sampling at different depths, Figure 1 As shown, the device injects water into the connecting groove 3 and the inner groove 4 through the overlapping hole 2 connected to the water pipe and the water pump. Since the overlapping hole 2, the connecting groove 3, the inner groove 4 and the spray hole 6 are interconnected, the surface of the connecting rod 8 and the outer tube sleeve 9 can be fully cleaned in this way to prevent the outer tube sleeve 9 from being stained with impurities on the surface after sampling and affecting the next sampling work, thereby achieving the purpose of full cleaning. The docking plate 7 inside the overlapping groove 5 ensures that the outer tube sleeve 9 is stably placed;

[0045] like Figure 1-5 As shown, when the device is in use, the fixing rod 20 can be rotated to make the internal block 19 move up and down inside the outer tube sleeve 9. Since each opening 10 corresponds to two fixing rods 20, the distance between two adjacent fixing rods 20 can be adjusted to perform quantitative sampling of water bodies at different depths, so that the device can adjust the sampling volume. When adjusting, it is necessary to pull the pull rope 25 to make the plugging cover 24 detach from the inside of the air vent 23 to ensure that the air pressure in the internal cavity formed by the two adjacent internal blocks 19 and the outer tube sleeve 9 is constant. After the position of the internal block 19 is adjusted, the plugging cover 24 is reinstalled. The sealing gasket 26 on the right side of the plugging cover 24 is used to ensure the overall sealing. The sealing gasket 26 on the far left of the plugging cover 24 abuts against the inner wall of the outer tube sleeve 9 to ensure that the plugging cover 24 is stably located inside the air vent 23 and will not easily detach, thereby achieving quantitative sampling of water bodies at different depths. Figure 6-8As shown, when sampling is performed, the buckle ring 15 can be pushed by sliding the through-type lap plate 18 inside the docking plate 7. At this time, the slider 17 slides inside the slide groove 16, so that the buckle ring 15 drives the baffle 13 to rotate, and the baffle 13 rotates on the outer tube sleeve 9 through the inner connecting rod 12 and the rotating groove 11. The extrusion pad 14 outside the baffle 13 will first contact the second groove 22. At this time, the extrusion pad 14 is squeezed until the extrusion pad 14 is stuck in the first groove 21. The extrusion pad 14 is no longer squeezed, and because the depth of the first groove 21 on the surface of the outer tube sleeve 9 is greater than the depth of the second groove 22 on the surface of the outer tube sleeve 9, the sealing state of the lap plate 18 and the outer tube sleeve 9 can be ensured by grooves of different depths to complete the entire sampling work. The above is the working process of the entire device, and the contents not described in detail in this specification belong to the existing technology known to professional and technical personnel in this field.

[0046] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A sampling device for water quality monitoring that facilitates sampling at different depths, comprising a floating plate (1), a buckle ring (15), a plug cover (24), a pull rope (25) and a sealing pad (26), characterized in that: The right side of the floating plate (1) is provided with an overlap hole (2), and the interior of the floating plate (1) is provided with a connecting groove (3) and an inner groove (4), and the upper surface of the floating plate (1) is provided with an overlap groove (5), and the inner surface of the floating plate (1) is provided with a spray hole (6), a docking plate (7) is placed inside the overlap groove (5), and a connecting rod (8) is fixedly connected below the docking plate (7), and an outer pipe sleeve (9) is fixedly connected below the connecting rod (8), and an opening (10) is provided on the surface of the outer pipe sleeve (9), and a rotating groove (11) is provided on the left side of the outer pipe sleeve (9), and an inner connecting rod (12) is movably installed inside the rotating groove (11), and a baffle (13) is fixedly connected to the side of the inner connecting rod (12), and the upper surface, lower surface and right surface of the baffle (13) are all fixedly connected to the extrusion pad (11). 4), and a buckle ring (15) is fixedly provided on the outer surface of the baffle (13), a slide groove (16) is provided on the rear side of the outer tube sleeve (9), and a slider (17) is movably installed inside the slide groove (16), and a lap plate (18) is fixedly provided on the surface of the slider (17), an internal connection block (19) is movably installed inside the outer tube sleeve (9), and a fixing rod (20) is fixedly provided on the surface of the internal connection block (19), a first groove (21) and a second groove (22) are provided on the inner wall of the front end opening (10) of the outer tube sleeve (9), and a vent hole (23) is provided on the side of the outer tube sleeve (9), and a blocking cover (24) is movably installed inside the vent hole (23), a draw rope (25) is fixedly connected inside the blocking cover (24), and a sealing gasket (26) is fixedly installed on the outside of the blocking cover (24); The slider (17) on the lap plate (18) corresponds to the slide groove (16) inside the outer tube sleeve (9), the baffle (13) forms a transmission structure with the outer tube sleeve (9) through the lap plate (18) and the buckle ring (15), and the outer tube sleeve (9) and the inner connection block (19) are threadedly connected, and the upper end of the lap plate (18) passes through the interior of the docking plate (7).

2. A water quality monitoring sampling device that is convenient for sampling at different depths according to claim 1, characterized in that: The central axis of the floating plate (1) and the central axis of the docking plate (7) are on the same straight line, the floating plate (1) is in the shape of a circular ring, and the inner diameter of the floating plate (1) is greater than the diameter of the outer pipe sleeve (9).

3. A water quality monitoring sampling device that is convenient for sampling at different depths according to claim 1, characterized in that: The overlapping holes (2), the connecting grooves (3), the inner grooves (4) and the spray holes (6) are interconnected, the inner grooves (4) are in the shape of a circular ring, and the spray holes (6) are distributed in a centrally symmetrical manner on the surface of the floating plate (1).

4. A water quality monitoring sampling device that is convenient for sampling at different depths according to claim 1, characterized in that: The docking plate (7), the connecting rod (8) and the outer pipe sleeve (9) are an integrated structure, the diameter of the docking plate (7) is larger than the inner diameter of the floating plate (1), and the outer wall of the docking plate (7) and the inner wall of the overlapping groove (5) are in contact with each other.

5. A water quality monitoring sampling device that is convenient for sampling at different depths according to claim 1, characterized in that: The openings (10) are distributed at equal intervals on the surface of the outer sleeve (9), and there is a one-to-one correspondence between the openings (10) and the baffles (13). The fixing rods (20) are symmetrically distributed on the upper and lower sides of the openings (10).

6. A water quality monitoring sampling device that is convenient for sampling at different depths according to claim 1, characterized in that: The inner wall of the rotating groove (11) and the outer wall of the inner connecting rod (12) are matched with each other, and the inner connecting rod (12) is a cylinder with a cut surface, and the central axis of the inner connecting rod (12) is located inside the rotating groove (11).

7. A water quality monitoring sampling device that facilitates sampling at different depths according to claim 1, characterized in that: The inner connecting rod (12), the baffle plate (13), the extrusion pad (14) and the buckle ring (15) are integrated into one body, and the baffle plate (13) is in the shape of a semicircular ring. The baffle plate (13) forms a rotating structure with the outer tube sleeve (9) through the inner connecting rod (12) and the rotating groove (11), and the extrusion pad (14) is made of rubber.

8. A water quality monitoring sampling device that facilitates sampling at different depths according to claim 1, characterized in that: The slider (17) forms a snap-fit ​​structure with the outer tube sleeve (9) through the slide groove (16), the slide groove (16) and the lap plate (18) are both arc-shaped, and the lap plate (18) forms a sliding structure with the outer tube sleeve (9) through the slider (17) and the slide groove (16).

9. A water quality monitoring sampling device that is convenient for sampling at different depths according to claim 1, characterized in that: The depth of the first groove (21) on the surface of the outer tube sleeve (9) is greater than the depth of the second groove (22) on the surface of the outer tube sleeve (9), and the baffle (13) forms a clamping structure with the outer tube sleeve (9) through the first groove (21) and the compression pad (14).

10. A water quality monitoring sampling device that is convenient for sampling at different depths according to claim 1, characterized in that: The sealing gasket (26) has a semicircular longitudinal cross-section, and the sealing gaskets (26) are evenly spaced outside the plugging cover (24), and the length of the plugging cover (24) is greater than the thickness of the outer pipe sleeve (9).

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