A multi-depth sampling device for water body detection

Abstract

The present invention provides a multi-depth sampling device for water body detection, belonging to the technical field of water body detection, including a sampling frame. A plurality of sampling seats slide inside the sampling frame, and an annular cavity is arranged inside the sampling seats. An opening and closing mechanism is arranged inside each sampling seat; when positioning the depth required for sampling, multiple groups of limiting plates can be pushed to retract into the respective sampling seats, and by pulling the multiple sampling seats to move to their required sampling depths respectively, the multiple sampling seats can be positioned respectively with the cooperation of the limiting components, which plays a role in positioning the sampling depth, effectively reduces the sampling limitation, can adapt to the requirements of different sampling points, reduces the time and labor costs during the sampling process, and at the same time can avoid being interfered by suspended substances, algae, etc. in the upper water layer during the sampling process, ensuring that the collected water sample can truly reflect the water quality status of the target water layer.

Description

Technical Field

[0001] The present invention relates to the technical field of water body detection, and particularly relates to a multi-depth sampling device for water body detection. Background Art

[0002] Water quality monitoring is a process of monitoring and measuring the types of pollutants in water bodies, the concentrations of various pollutants and their changing trends, and evaluating the water quality status. The monitoring scope is very wide, including natural waters (rivers, lakes, seas and groundwater) that are not polluted and those that have been polluted, as well as various industrial wastewaters, etc. The main monitoring items can be divided into two categories: one is the comprehensive indicators reflecting the water quality status, such as temperature, chromaticity, turbidity, pH value, conductivity, suspended solids, dissolved oxygen, chemical oxygen demand and biochemical oxygen demand, etc.; the other is some toxic substances, such as phenol, cyanide, arsenic, lead, chromium, cadmium, mercury and organic pesticides, etc. To objectively evaluate the water quality status of rivers and seas, in addition to the above monitoring items, the measurement of flow velocity and flow rate is sometimes required.

[0003] There is a sampling seat in the prior art. For example, Chinese Utility Model Patent Application CN212780133U discloses a sampling device for water body detection, which involves a sampling bucket with sealed upper and lower ends, several partition plates horizontally and evenly spaced in the sampling bucket, and a handle connected to the sampling bucket. The several partition plates divide the interior of the sampling bucket into several cavities with the same space size. Water inlets and outlets are respectively arranged on the peripheral wall of the sampling bucket opposite to each cavity. A rubber plug is arranged at the water outlet of the sampling bucket, and a closing component for closing the water inlet is arranged on the sampling bucket; the closing component includes a closing arc plate arranged along the length direction of the peripheral wall of the sampling bucket, the closing arc plate is rotatably connected to the peripheral wall of the sampling bucket, and a driving component for driving the closing arc plate to rotate is arranged at the upper end of the sampling bucket.

[0004] However, the above patent still has certain deficiencies. In the process of sampling water quality in the above solution, there are cavities inside the sampling bucket. During the overhaul and maintenance of the sampling bucket, it needs to be installed and disassembled. Since there are cavities inside and the cavities are filled with air, and the overall volume of the sampling bucket is large, because the overall buoyancy of the sampling bucket is proportional to the volume of the displaced water, the buoyancy generated by water on the sampling bucket is large. As the sampling bucket is gradually immersed in water, the buoyancy received by the sampling cylinder gradually increases, resulting in difficulty for the sampling cylinder to sink. If the mass of the sampling cylinder is increased, it will affect the convenience of sampling, increase the difficulty of sampling, and affect the sampling efficiency.

[0005] Therefore, there is an urgent need for a multi-depth sampling device for water body detection in the prior art. Summary of the Invention

[0006] The object of the present invention is to provide a multi-depth sampling device for water body detection, so as to solve the problem of low sampling efficiency of the sampling base in the prior art.

[0007] To solve the above technical problems, the present invention specifically provides the following technical solutions:

[0008] A multi-depth sampling device for water body detection includes a sampling frame. A plurality of sampling bases are slidably arranged inside the sampling frame, and an annular cavity is arranged inside the sampling base. An opening and closing mechanism is arranged inside each sampling base, and a sampling structure is arranged at the top end of each sampling base;

[0009] A first transmission shaft and a second transmission shaft are rotatably connected inside the sampling frame. The top end of the first transmission shaft is connected to a first motor through a rotating shaft, and the top end of the second transmission shaft is connected to a second motor through a rotating shaft;

[0010] The opening and closing mechanism includes a plurality of sealing plates slidably connected to the inner side wall of the sampling base. A rack is fixedly connected to the top end of each sealing plate. A toothed ring is rotatably arranged on the inner wall of the sampling base, and a plurality of racks are engaged with the toothed ring. A driving toothed ring rotatably connected to the inner wall of the sampling base is sleeved on the arc surface of the first transmission shaft, and the driving toothed ring is engaged with the toothed ring. A sampling groove is opened at the top end of the sampling base, and a one-way valve extending below the sampling base is fixed at the end of the sampling groove;

[0011] The sampling structure includes a guiding frame fixedly arranged at the top end of the sampling base. A plugging rod is inserted at the bottom end of the guiding frame. The sampling structure further includes a second belt ring sleeved on the outer wall of the plugging rod. A first belt ring is sleeved on the arc surface of the second transmission shaft. A belt body is arranged between the second belt ring and the first belt ring. A piston body slidably connected to the top end of the sampling base is fixedly arranged at the bottom end of the plugging rod.

[0012] As a preferred embodiment of the multi-depth sampling device for water body detection of the present invention, the second transmission shaft is located on one side of the first transmission shaft, and both the first transmission shaft and the second transmission shaft penetrate through the sampling frame and extend to the top end of the sampling frame. The first motor is installed at the top end of the sampling frame, the second motor is installed at the top end of the sampling frame, and the second motor is located on one side of the first motor.

[0013] As a preferred embodiment of the multi-depth sampling device for water body detection of the present invention, a plurality of movable grooves are formed at the inner bottom of the annular cavity, and the plurality of movable grooves are respectively closed or opened by a plurality of sealing plates. The inner wall of the sampling groove is slidably connected to the piston body, and the piston body is cylindrical. A plurality of water inlet grooves communicating with the outside of the sampling seat are obliquely formed on the inner wall of the sampling groove, and the plurality of water inlet grooves are respectively communicated with the plurality of movable grooves. The plurality of water inlet grooves are annularly arranged around the central axis of the piston body. An opening groove matching the sealing plate is formed at the top end of each movable groove. A sealing strip slidably connected to the inner wall of the annular cavity is fixedly arranged on one side of each sealing plate, and the sealing strip is used to seal the opening groove during movement.

[0014] As a preferred embodiment of the multi-depth sampling device for water body detection of the present invention, a first rotating hole matching the first transmission shaft is formed at the end of the transmission gear ring. A first clamping block clamped to the outer wall of the first transmission shaft is fixedly arranged on the inner wall of the transmission gear ring. A first clamping groove is formed on the first transmission shaft near one side of the plurality of first clamping blocks, and the first clamping groove matches the plurality of first clamping blocks.

[0015] As a preferred embodiment of the multi-depth sampling device for water body detection of the present invention, the sampling structure includes a protective shell fixed to the top end of the sampling seat, and the second belt ring is rotatably connected to the inner wall of the protective shell. The first belt ring is rotatably connected to the inner wall of the protective shell. The plugging rod includes an upper plugging rod slidably connected to the bottom end of the guiding frame. A threaded rod is fixedly arranged at the bottom end of the upper plugging rod, and the bottom end of the threaded rod is fixedly connected to the piston body.

[0016] As a preferred embodiment of the multi-depth sampling device for water body detection of the present invention, a threaded groove matching the threaded rod is formed inside the second belt ring, and the inside of the second belt ring is threadedly connected to the threaded rod. A second clamping block clamped to the outer wall of the second transmission shaft is fixedly arranged on the inner wall of the first belt ring. A second clamping groove is formed on the second transmission shaft near one side of the plurality of second clamping blocks, and the second clamping groove matches the plurality of second clamping blocks.

[0017] As a preferred embodiment of the multi-depth sampling device for water body detection of the present invention, a plurality of mounting columns are clamped to the outside of the sampling frame, and the plurality of mounting columns are annularly arranged around the central axis of the sampling groove. The plurality of mounting columns are all mounted on the top end of the riverbed.

[0018] As a preferred embodiment of the multi-depth sampling device for water body detection of the present invention, a plurality of limiting components are arranged on the outside of each sampling seat. Each limiting component includes a limiting plate slidable on the outer wall of the sampling seat. A return spring is fixedly arranged between each limiting plate and the outer wall of the sampling seat near the sampling seat. A plurality of pairs of limiting grooves matching the limiting plates are formed on the outer wall of the sampling frame, and the plurality of pairs of limiting grooves are annularly arranged.

[0019] The present invention has the following beneficial effects compared with the prior art:

[0020] 1. When sampling water quality, the present invention can install the sampling seat between multiple sampling frames, and then start the first motor. With the cooperation of multiple opening and closing mechanisms, the sampled water can enter the interior of the sampling seat through multiple groups of water inlet grooves. Then start the second motor, and with the cooperation of multiple sampling structures, the sampled water enters the interior of the sampling seat. The overall sampling bucket is divided into multiple sampling seats, reducing the overall volume of displaced water, thereby reducing the buoyancy of the overall sampling device, improving the convenience of sampling of the sampling seat, and thus improving the sampling efficiency. At the same time, both the first motor and the second motor are above the water surface, avoiding the risk of electric shock caused by electrical equipment being immersed in water, and significantly reducing the probability of electric shock accidents;

[0021] 2. When positioning the depth of the water to be sampled, the present invention can push multiple groups of limiting plates to retract into multiple sampling seats respectively, and by pulling multiple sampling seats to move to their required sampling depths, with the cooperation of the limiting components, multiple sampling seats can be positioned respectively, playing a role in positioning the sampling depth, effectively reducing the sampling limitation, being able to adapt to the needs of different sampling points, reducing the time and labor costs during the sampling process, and at the same time avoiding interference from suspended substances and algae in the upper water layer during the sampling process, ensuring that the collected water sample can truly reflect the water quality of the target water layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only exemplary, and for those of ordinary skill in the art, without creative efforts, other implementation drawings can be obtained according to the provided drawings.

[0023] Figure 1 Overall three-dimensional view of the sampling device of the present invention;

[0024] Figure 2 Front three-dimensional view of the sampling frame of the present invention;

[0025] Figure 3 Front three-dimensional view of the sampling seat of the present invention;

[0026] Figure 4 For the present invention Figure 3 Partial enlarged view of A in;

[0027] Figure 5 Distribution diagram of filling parts of the present invention

[0028] Figure 6Isometric sectional view of the sampling base of the present invention;

[0029] Figure 7 Bottom-up sectional view of the sampling base of the present invention;

[0030] Figure 8 Of the present invention Figure 7 Partial enlarged view of B in;

[0031] Figure 9 Structural schematic diagram of the sampling base of the present invention;

[0032] Figure 10 Structural schematic diagram of the sampling structure of the present invention;

[0033] Figure 11 Structural schematic diagram of the connection between the first belt loop and the second belt loop of the present invention;

[0034] Figure 12 Structural schematic diagram of the limit component of the present invention;

[0035] Figure 13 Structural schematic diagram of the one-way valve of the present invention.

[0036] In the figure: 1. Sampling frame; 11. Mounting column; 12. First transmission shaft; 13. Second transmission shaft; 2. Sampling base;

[0037] 3. Opening and closing mechanism; 31. Driving gear ring; 311. First clamping block; 32. Gear ring; 33. Rack; 34. Sealing plate; 35. Water inlet groove; 36. One-way valve; 37. Sampling groove;

[0038] 4. Sampling structure; 41. Protective shell; 42. First belt loop; 421. Second clamping block; 43. Second belt loop; 44. Belt body; 45. Guide frame; 46. Inserting rod; 461. Upper inserting rod; 462. Threaded rod; 47. Piston body;

[0039] 5. Limit component; 51. Limit plate; 52. Return spring; 53. Limit groove. Detailed implementation manners

[0040] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0041] First, the concepts involved in the present application will be described in conjunction with the accompanying drawings. It should be noted here that the following descriptions of each concept are only for making the content of the present application easier to understand and do not represent a limitation on the protection scope of the present application; at the same time, without conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

[0042] As Figures 1 to 13 shown, according to one aspect of the present invention, a multi-depth sampling device for water body detection is provided, which includes a sampling frame 1. A plurality of sampling seats 2 are slidably arranged inside the sampling frame 1, and an annular cavity is arranged inside the sampling seat 2. An opening and closing mechanism 3 is arranged inside each sampling seat 2, and a sampling structure 4 is arranged at the top of each sampling seat 2;

[0043] The first transmission shaft 12 and the second transmission shaft 13 are rotatably connected inside the sampling frame 1. The top of the first transmission shaft 12 is connected to a first motor through a rotating shaft, and the top of the second transmission shaft 13 is connected to a second motor through a rotating shaft. A storage battery for supplying power to the first motor and the second motor is arranged on the sampling frame 1;

[0044] The opening and closing mechanism 3 includes a plurality of sealing plates 34 slidably connected to the inner side wall of the sampling seat 2. A rack 33 is fixedly connected to the top of each sealing plate 34. A toothed ring 32 is rotatably arranged on the inner wall of the sampling seat 2, and a plurality of racks 33 are all engaged with the toothed ring 32. A driving toothed ring 31 rotatably connected to the inner wall of the sampling seat 2 is sleeved on the arc surface of the first transmission shaft 12, and the driving toothed ring 31 is engaged with the toothed ring 32. A sampling groove 37 is opened at the top of the sampling seat 2, and a one-way valve 36 extending below the sampling seat 2 is fixed at the end of the sampling groove 37;

[0045] The sampling structure 4 includes a guiding frame 45 fixedly arranged at the top of the sampling seat 2. A plugging rod 46 is inserted at the bottom of the guiding frame 45. The sampling structure 4 further includes a second belt ring 43 sleeved on the outer wall of the plugging rod 46. A first belt ring 42 is sleeved on the arc surface of the second transmission shaft 13. A belt body 44 is arranged between the second belt ring 43 and the first belt ring 42. A piston body 47 slidably connected to the top of the sampling seat 2 is fixedly arranged at the bottom of the plugging rod 46.

[0046] The second transmission shaft 13 is located on one side of the first transmission shaft 12, and both the first transmission shaft 12 and the second transmission shaft 13 penetrate through the sampling frame 1 and extend to the top of the sampling frame 1. The first motor is installed at the top of the sampling frame 1, the second motor is installed at the top of the sampling frame 1, and the second motor is located on one side of the first motor.

[0047] A plurality of movable grooves are formed in the inner bottom of the annular cavity, and the plurality of movable grooves are respectively closed or opened by a plurality of sealing plates 34. The inner wall of the sampling groove 37 is slidably connected to the piston body 47, and the piston body 47 is cylindrical. A plurality of water inlet grooves 35 communicating with the outside of the sampling base 2 are obliquely formed in the inner wall of the sampling groove 37, and the plurality of water inlet grooves 35 are respectively communicated with the plurality of movable grooves. The plurality of water inlet grooves 35 are annularly arranged around the central axis of the piston body 47. An opening groove matching the sealing plate 34 is formed at the top end of each movable groove. A sealing strip slidably connected to the inner wall of the annular cavity is fixedly arranged on one side of each sealing plate 34, and the sealing strip is used to seal the opening groove during movement.

[0048] A first rotation hole matching the first transmission shaft 12 is formed at the end of the transmission gear ring 31. A first clamping block 311 clamped to the outer wall of the first transmission shaft 12 is fixedly arranged on the inner wall of the transmission gear ring 31. A first clamping groove is formed on the first transmission shaft 12 near one side of the plurality of first clamping blocks 311, and the first clamping groove matches the plurality of first clamping blocks 311.

[0049] The sampling structure 4 includes a protective shell 41 fixed to the top end of the sampling base 2. The second belt ring 43 is rotatably connected to the inner wall of the protective shell 41. The first belt ring 42 is rotatably connected to the inner wall of the protective shell 41. The insertion rod 46 includes an upper insertion rod 461 slidably connected to the bottom end of the guide frame 45. A threaded rod 462 is fixedly arranged at the bottom end of the upper insertion rod 461, and the bottom end of the threaded rod 462 is fixedly connected to the piston body 47.

[0050] A threaded groove matching the threaded rod 462 is formed inside the second belt ring 43, and the inside of the second belt ring 43 is threadedly connected to the threaded rod 462. A second clamping block 421 clamped to the outer wall of the second transmission shaft 13 is fixedly arranged on the inner wall of the first belt ring 42. A second clamping groove is formed on the second transmission shaft 13 near one side of the plurality of second clamping blocks 421, and the second clamping groove matches the plurality of second clamping blocks 421.

[0051] A plurality of mounting columns 11 are clamped to the outside of the sampling frame 1. The plurality of mounting columns 11 are annularly arranged around the central axis of the sampling groove 37, and the plurality of mounting columns 11 are all mounted on the top end of the riverbed.

[0052] When sampling the water quality, the sampling frame 1 can be lifted by a lifting device to a position between multiple mounting columns 11. When the bottom end of the sampling frame 1 is in close contact with the riverbed, at this time, multiple sampling seats 2 are completely immersed in the sampling water. At the same time, the sides of multiple sealing plates 34 away from the one-way valve 36 can be in contact with the sampling water. At this time, the sampling seats 2 can be left standing to make the sampling water in a relatively static state. Its function is to prevent the sampling water from being mixed up and down due to the descent of the sampling frame 1, thereby improving the accuracy of the sampling data. When the sampling water is in a relatively static state, the first motor can be started, and the first transmission shaft 12 can be driven to rotate under the connection of the rotating shaft. Since multiple first clamping blocks 311 fixedly arranged inside multiple transmission gear rings 31 are all engaged with the first clamping grooves formed on the surface of the first transmission shaft 12, the first transmission shaft 12 drives the transmission gear rings 31 to rotate synchronously while transmitting power, and then drives the gear ring 32 engaged with the transmission gear ring 31 to rotate around the position connected to the sampling seat 2. As Figure 6 shown, at this time, the gear ring 32 can rotate clockwise, and the rotation of the gear ring 32 drives multiple racks 33 engaged with it to slide. At the same time, it drives the sealing plate 34 fixed on the rack 33 to slide inside the movable groove, and then pulls the sealing strip fixedly connected to the sealing plate 34 to slide at the top of the movable groove, that is, at the notch of the open groove. When the sealing plate 34 slides into the movable groove to open the water inlet groove 35, the sealing strip can seal the open groove to prevent water from entering the inner annular cavity of the sampling seat 2 through the movable groove, and avoid the parts being corroded due to water staying in the annular cavity for a long time. When the sealing plate 34 opens the water inlet groove 35, the sampling water can pour into the water inlet groove 35. At this time, the second motor can be started, and the second transmission shaft 13 can be driven to rotate around the position connected to the sampling frame 1 under the connection of the rotating shaft. Since multiple second clamping blocks 421 fixedly arranged inside multiple first belt rings 42 are all engaged with the second clamping grooves formed on the surface of the second transmission shaft 13, the second transmission shaft 13 can drive each first belt ring 42 to rotate synchronously while rotating. At this time, under the connection of each belt body 44, the second belt ring 43 can be driven to rotate. As Figure 9 shown, since the second belt ring 43 is threadedly connected to the threaded rod 462, and since the upper insertion rod 461 fixed to the top of the threaded rod 462 is slidably connected to the guide frame 45, the second belt ring 43 can drive the insertion rod 46 to move upward while rotating, and at the same time drive the piston body 47 fixed to the bottom end of the insertion rod 46 to slide upward. A negative pressure can be generated between the top end of the sampling seat 2 and the bottom end of the piston body 47, so that the sampling water can enter the sampling seat 2 through multiple water inlet grooves 35, achieving the purpose of multi-layer sampling. At the same time, multiple independent sampling seats 2 are provided to reduce the overall drainage volume of the sampling device, thereby reducing the overall buoyancy and improving the sampling efficiency of the sampling frame 1.

[0053] In this embodiment, a plurality of limiting components 5 are arranged outside each sampling seat 2. Each limiting component 5 includes a limiting plate 51 that slides on the outer wall of the sampling seat 2. A return spring 52 is fixedly arranged between each limiting plate 51 and the outer wall of the sampling seat 2 on the side close to the sampling seat 2. A plurality of pairs of limiting grooves 53 matching the limiting plates 51 are formed on the outer wall of the sampling frame 1, and the plurality of pairs of limiting grooves 53 are distributed in an annular array.

[0054] Before sampling, multiple groups of limiting plates 51 can be simultaneously pushed to slide on the outer walls of multiple sampling seats 2, and multiple return springs 52 are simultaneously compressed by extrusion. By pulling multiple sampling seats 2 to move to their required sampling depths respectively, during this process, the first clamping block 311 fixed inside the transmission gear ring 31 can slide inside the first clamping groove formed on the surface of the first transmission shaft 12, and at the same time, the second clamping block 421 fixed inside the first belt ring 42 can slide inside the second clamping groove formed on the surface of the second transmission shaft 13. Then, by releasing the limiting plates 51, the multiple limiting plates 51 are pushed to reset under the elastic force of the return springs 52, so that the multiple limiting plates 51 are respectively engaged with the multiple limiting grooves 53, which plays a role in positioning the sampling depth. Moreover, each sampling seat 2 can independently adjust its required sampling depth, so as to achieve the purpose of adapting to different sampling requirements.

[0055] The working principle of this device is as follows: By simultaneously pushing multiple sets of limit plates 51 to slide on the outer walls of multiple sampling seats 2 respectively, multiple reset springs 52 are compressed respectively. And by pulling multiple sampling seats 2 to move to their required sampling depths respectively. During this process, the first clamping blocks 311 fixed inside the transmission gear ring 31 can slide inside the first clamping grooves formed on the surface of the first transmission shaft 12. At the same time, the second clamping blocks 421 fixed inside the first belt ring 42 can slide inside the second clamping grooves formed on the surface of the second transmission shaft 13. Then, by releasing the limit plates 51, the multiple limit plates 51 are pushed to reset under the elastic force of the reset springs 52, so that the multiple limit plates 51 are respectively engaged with multiple limit grooves 53. When sampling water quality, the sampling frame 1 can be lifted by a lifting device between multiple mounting columns 11. When the bottom end of the sampling frame 1 is in close contact with the riverbed, at this time, multiple sampling seats 2 are completely immersed in the sampling water. At the same time, the sides of multiple sets of sealing plates 34 away from the one-way valves 36 can contact the sampling water. At this time, by standing still the sampling seats 2, the sampling water can be in a relatively static state. Its function is to prevent the occurrence of the upper and lower layer mixing of the sampling water caused by the descent of the sampling frame 1 and improve the accuracy of sampling data. When the sampling water is in a relatively static state, by starting the first motor, the first transmission shaft 12 can be driven to rotate under the connection of the rotating shaft. Since the multiple first clamping blocks 311 fixed inside the multiple transmission gear rings 31 are all engaged with the first clamping grooves formed on the surface of the first transmission shaft 12, the first transmission shaft 12 drives the transmission gear ring 31 to rotate synchronously while transmitting power. Then, it drives the gear ring 32 engaged with the transmission gear ring 31 to rotate around the connection position with the sampling seat 2. At this time, the gear ring 32 can rotate clockwise. The rotation of the gear ring 32 drives multiple racks 33 engaged with it to slide, and at the same time drives the sealing plates 34 fixed on the racks 33 to slide inside the movable grooves. Then, it pulls the sealing strips fixed to the sealing plates 34 to slide at the top of the movable grooves, that is, at the notch of the open groove. When the sealing plate 34 slides into the movable groove to open the water inlet groove 35, the sealing strip can seal the open groove to prevent water from entering the inner annular cavity of the sampling seat 2 through the movable groove, and avoid the corrosion of components caused by the long-term retention of water in the annular cavity. When the sealing plate 34 opens the water inlet groove 35, the sampling water can rush into the water inlet groove 35. At this time, by starting the second motor, the second transmission shaft 13 can be driven to rotate around the connection position with the sampling frame 1 under the connection of the rotating shaft. Since the multiple second clamping blocks 421 fixed inside the multiple first belt rings 42 are all engaged with the second clamping grooves formed on the surface of the second transmission shaft 13, the second transmission shaft 13 can drive each first belt ring 42 to rotate synchronously while rotating. At this time, under the connection of each belt body 44, the second belt ring 43 can be driven to rotate. Since the second belt ring 43 is threadedly connected with the threaded rod 462, and since the upper insertion rod 461 fixed at the top of the threaded rod 462 is slidably connected with the guide frame 45,The second belt loop 43 can drive the plugging rod 46 to move upward while rotating, and at the same time drive the piston body 47 fixed to the bottom end of the plugging rod 46 to slide upward, so that a negative pressure can be generated between the top end of the sampling seat 2 and the bottom end of the piston body 47, enabling the sampling water to enter the inside of the sampling seat 2 through multiple water inlet grooves 35. When it is necessary to take out the sampled water quality, the sampling rack 1 can be lifted by a lifting device, and then the transfer container is placed below the one-way valve 36. By starting the second motor and with the cooperation of the sampling structure 4, the piston body 47 can push the sampled water quality. At this time, the pressure inside the sampling seat 2 increases, which can push open the one-way valve 36 and enable the sampled water quality to be discharged through the one-way valve 36.

[0056] In this article, specific examples are used to elaborate on the principle and implementation manner of the present application. The description of the above embodiments is only used to help understand the method and its core idea of the present application. The above is only the preferred implementation manner of the present application. It should be noted that due to the limited nature of literal expression and objectively infinite specific structures, for those of ordinary skill in the art in this technical field, without departing from the principle of the present application, several improvements, refinements or changes can be made, or the above technical features can be combined in an appropriate manner; these improvements, refinements, changes or combinations, or directly applying the inventive concept and technical solution to other occasions without improvement, shall all be regarded as the protection scope of the present application.

Claims

1. A multi-depth sampling device for water body detection, comprising a sampling frame (1), characterized in that: A plurality of sampling seats (2) are slidably arranged inside the sampling rack (1), and an annular cavity is arranged inside the sampling seat (2), an opening and closing mechanism (3) is arranged inside each sampling seat (2), and a sampling structure (4) is arranged at the top of each sampling seat (2); The sampling rack (1) is internally rotatably connected with a first transmission shaft (12) and a second transmission shaft (13); the top end of the first transmission shaft (12) is connected to a first motor via a rotating shaft, and the top end of the second transmission shaft (13) is connected to a second motor via a rotating shaft; The opening and closing mechanism (3) comprises a plurality of sealing plates (34) slidably connected to the inner wall of the sampling seat (2), a rack (33) being fixedly connected to the top of each sealing plate (34), a gear ring (32) being rotatably provided on the inner wall of the sampling seat (2), and the plurality of gear rings (33) are meshed with the gear ring (32), a transmission gear ring (31) rotatably connected to the inner wall of the sampling seat (2) being sleeved on the arc surface of the first transmission shaft (12), and the transmission gear ring (31) is meshed with the gear ring (32), a sampling groove (37) is provided at the top of the sampling seat (2), and a one-way valve (36) extending to the bottom of the sampling seat (2) is fixed at the end of the sampling groove (37); The sampling structure (4) comprises a guide frame (45) fixedly arranged at the top end of the sampling seat (2), a plug-in rod (46) being inserted at the bottom end of the guide frame (45), the sampling structure (4) further comprises a second belt ring (43) sleeved on the outer wall of the plug-in rod (46), a first belt ring (42) being sleeved on the arc surface of the second transmission shaft (13), a belt body (44) being arranged between the second belt ring (43) and the first belt ring (42), and a piston body (47) being fixedly arranged at the bottom end of the plug-in rod (46) and being slidably connected to the top end of the sampling seat (2); A plurality of limit assemblies (5) are arranged on the outside of each sampling seat (2), each of the limit assemblies (5) comprises a limit plate (51) sliding with the outer wall of the sampling seat (2), a return spring (52) is fixedly arranged between the side of each limit plate (51) close to the sampling seat (2) and the outer wall of the sampling seat (2), and a plurality of pairs of limit grooves (53) matching the limit plates (51) are provided on the outer wall of the sampling rack (1), and the plurality of pairs of limit grooves (53) are distributed in a ring array.

2. A multi-depth sampling device for water body detection according to claim 1, characterized in that: The second transmission shaft (13) is located on one side of the first transmission shaft (12), and both the first transmission shaft (12) and the second transmission shaft (13) pass through the sampling rack (1) and extend to the top of the sampling rack (1), the first motor is installed at the top of the sampling rack (1), the second motor is installed at the top of the sampling rack (1), and the second motor is located on one side of the first motor.

3. A multi-depth sampling device for water body detection according to claim 1, characterized in that: The inner bottom of the annular cavity is provided with a plurality of movable grooves, and the plurality of movable grooves are respectively closed or opened by a plurality of sealing plates (34); the inner wall of the sampling groove (37) is slidably connected to the piston body (47), and the piston body (47) is cylindrical; the inner wall of the sampling groove (37) is obliquely provided with a plurality of water inlet grooves (35) connected to the outside of the sampling seat (2), and the plurality of water inlet grooves (35) are respectively connected to the plurality of movable grooves, and the plurality of water inlet grooves (35) are distributed in an annular array about the central axis of the piston body (47), and the top of each movable groove is provided with an opening groove matching the sealing plate (34); a sealing strip slidably connected to the inner wall of the annular cavity is fixedly provided on one side of each sealing plate (34), and the sealing strip is used to seal the opening groove during movement.

4. A multi-depth sampling device for water body detection according to claim 1, characterized in that: A first rotating hole matching the first transmission shaft (12) is provided at the end of the transmission gear ring (31); a first clamping block (311) clamped to the outer wall of the first transmission shaft (12) is fixedly arranged on the inner wall of the transmission gear ring (31); and a first clamping groove is provided on the first transmission shaft (12) on one side close to the plurality of first clamping blocks (311); the first clamping groove matches the plurality of first clamping blocks (311).

5. A multi-depth sampling device for water body detection according to claim 3, characterized in that: The sampling structure (4) includes a protective shell (41) fixed to the top of the sampling seat (2), and the second belt ring (43) is rotatably connected to the inner wall of the protective shell (41), the first belt ring (42) is rotatably connected to the inner wall of the protective shell (41), and the plug-in rod (46) includes an upper plug-in rod (461) slidably connected to the bottom end of the guide frame (45), and a threaded rod (462) is fixedly provided at the bottom end of the upper plug-in rod (461), and the bottom end of the threaded rod (462) is fixedly connected to the piston body (47).

6. A multi-depth sampling device for water body detection according to claim 1, characterized in that: A thread groove matching the threaded rod (462) is provided inside the second belt ring (43), and the second belt ring (43) is threadedly connected to the threaded rod (462). A second clamping block (421) engaging with the outer wall of the second transmission shaft (13) is fixedly provided on the inner wall of the first belt ring (42). A second clamping groove is provided on one side of the second transmission shaft (13) close to the plurality of second clamping blocks (421), and the second clamping groove matches the plurality of second clamping blocks (421).

7. A multi-depth sampling device for water body detection according to claim 3, characterized in that: A plurality of mounting columns (11) are clamped on the outside of the sampling frame (1), and the plurality of mounting columns (11) are arranged in a circular array about the central axis of the sampling tank (37), and the plurality of mounting columns (11) are all installed on the top of the riverbed.

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