Multi-depth sampling device for water body detection

Abstract

The invention provides a multi-depth sampling device for water detection, and belongs to the technical field of water detection, the multi-depth sampling device comprises a sampling frame, a plurality of sampling seats are slidably arranged in the sampling frame, annular cavities are formed in the sampling seats, and an opening and closing mechanism is arranged in each sampling seat; when the depth needing to be sampled is positioned, a plurality of groups of limiting plates can be pushed to retract into a plurality of sampling seats respectively, and the sampling seats are pulled to move to the required sampling depth respectively, so that the sampling seats can be positioned respectively under the cooperation of a limiting assembly, and the effect of positioning the sampling depth is achieved; the sampling limitation is effectively reduced, the requirements of different sampling points can be met, the time and labor cost in the sampling process is reduced, meanwhile, interference of suspended solids, algae and the like in the upper-layer water body in the sampling process can be avoided, and it is ensured that the collected water sample can truly reflect the water quality condition of a target water layer.

Description

Technical Field

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

[0002] Water quality monitoring is the 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. The monitoring scope is very wide, including unpolluted and polluted natural water (rivers, lakes, seas and groundwater) and various industrial drainage. The main monitoring items can be divided into two categories: one is the comprehensive indicators reflecting the water quality, such as temperature, color, turbidity, pH value, conductivity, suspended solids, dissolved oxygen, chemical oxygen demand and biochemical oxygen demand; the other is some toxic substances, such as phenol, cyanide, arsenic, lead, chromium, cadmium, mercury and organic pesticides. In order to objectively evaluate the water quality of rivers and oceans, in addition to the above monitoring items, it is sometimes necessary to measure the flow rate and flow.

[0003] There is a sampling seat in the prior art. For example, Chinese invention patent application CN212780133U discloses a sampling device for water body detection, which involves a sampling barrel with sealed ends at the upper and lower ends, a plurality of partition plates evenly spaced horizontally in the sampling barrel, and a handle connected to the sampling barrel, wherein the plurality of partition plates divide the interior of the sampling barrel into a plurality of cavities of equal size, a water inlet and a water outlet are respectively provided on the peripheral wall of the sampling barrel facing each cavity, a rubber plug is provided at the water outlet, and a closing component for closing the water inlet is provided on the sampling barrel; the closing component includes a closing arc plate arranged along the length direction of the peripheral wall of the sampling barrel, the closing arc plate is rotatably connected to the peripheral wall of the sampling barrel, and a driving component for driving the closing arc plate to rotate is provided on the upper end of the sampling barrel.

[0004] However, the above patent still has certain shortcomings. In the process of sampling water quality in the above scheme, there is a cavity inside the sampling barrel. During the inspection and maintenance of the sampling barrel, it needs to be installed and disassembled. Since there is a cavity inside, the cavity is filled with air, and the overall volume of the sampling barrel is large. Since the overall buoyancy of the sampling barrel is proportional to the volume of the displaced water, the buoyancy of the water on the sampling barrel is large. As the sampling barrel as a whole is gradually immersed in water, the buoyancy of the sampling tube gradually increases, making it difficult for the sampling tube to sink. If the mass of the sampling tube is increased, it will affect the convenience of sampling, increase the difficulty of sampling, and affect the efficiency of sampling.

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

[0007] In order 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 comprises a sampling frame, a plurality of sampling seats are slidably arranged inside the sampling frame, an annular cavity is arranged inside the sampling seat, an opening and closing mechanism is arranged inside each sampling seat, and a sampling structure is arranged at the top of each sampling seat;

[0009] The sampling rack is internally rotatably connected with a first transmission shaft and a second transmission shaft, the top end of the first transmission shaft is connected to a first motor via a rotating shaft, and the top end of the second transmission shaft is connected to a second motor via a rotating shaft;

[0010] The opening and closing mechanism includes a plurality of sealing plates slidably connected to the inner wall of the sampling seat, a rack is fixedly connected to the top of each sealing plate, a gear ring is rotatably provided on the inner wall of the sampling seat, and the plurality of racks are meshed with the gear ring, a transmission gear ring rotatably connected to the inner wall of the sampling seat is sleeved on the arc surface of the first transmission shaft, and the transmission gear ring is meshed with the gear ring, a sampling groove is provided on the top of the sampling seat, and a one-way valve extending to the bottom of the sampling seat is fixed at the end of the sampling groove;

[0011] The sampling structure includes a guide frame fixedly arranged on the top of the sampling seat, a plug-in rod is inserted at the bottom end of the guide frame, the sampling structure also includes a second belt ring sleeved on the outer wall of the plug-in rod, the arc surface of the second transmission shaft is sleeved with a first belt ring, a belt body is arranged between the second belt ring and the first belt ring, and a piston body is fixedly arranged at the bottom end of the plug-in rod and is slidably connected to the top of the sampling seat.

[0012] As a preferred embodiment of a 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 pass through the sampling frame and extend to the top of the sampling frame, the first motor is installed at the top of the sampling frame, the second motor is installed at the top of the sampling frame, and the second motor is located on one side of the first motor.

[0013] As a preferred embodiment of a multi-depth sampling device for water body detection of the present invention, a plurality of movable grooves are provided on 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 connected to the outside of the sampling seat are obliquely provided on the inner wall of the sampling groove, and the plurality of water inlet grooves are respectively connected to the plurality of movable grooves, and the plurality of water inlet grooves are distributed in an annular array about the central axis of the piston body, and an opening groove matching the sealing plate is provided on the top of each movable groove, a sealing strip slidably connected to the inner wall of the annular cavity is fixedly provided 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 a multi-depth sampling device for water body detection of the present invention, a first rotating hole matching the first transmission shaft is provided at the end of the transmission gear ring, a first clamping block connected to the outer wall of the first transmission shaft is fixedly arranged on the inner wall of the transmission gear ring, and a first clamping groove is provided on the side of the first transmission shaft close to the multiple first clamping blocks, and the first clamping groove matches the multiple first clamping blocks.

[0015] As a preferred embodiment of a multi-depth sampling device for water body detection according to the present invention, the sampling structure includes a protective shell fixed to the top 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, and the plug-in rod includes an upper plug-in rod slidably connected to the bottom end of the guide frame, a threaded rod is fixedly provided at the bottom end of the upper plug-in rod, and the bottom end of the threaded rod is fixedly connected to the piston body.

[0016] As a preferred embodiment of a multi-depth sampling device for water body detection of the present invention, a thread groove matching the threaded rod is provided inside the second belt loop, and the second belt loop is threadedly connected to the threaded rod, a second clamping block engaging with the outer wall of the second transmission shaft is fixedly provided on the inner wall of the first belt loop, a second clamping groove is provided on one side of the second transmission shaft close to the multiple second clamping blocks, and the second clamping groove matches the multiple second clamping blocks.

[0017] As a preferred solution of the multi-depth sampling device for water body detection of the present invention, a plurality of mounting columns are clamped on the outer side of the sampling frame, and the plurality of mounting columns are arranged in a circular array about the central axis of the sampling trough, and the plurality of mounting columns are all installed on the top of the riverbed.

[0018] As a preferred embodiment of a multi-depth sampling device for water body detection according to the present invention, a plurality of limit assemblies are arranged on the outside of each sampling seat, each of the limit assemblies includes a limit plate that slides with the outer wall of the sampling seat, a return spring is fixedly arranged between the side of each limit plate close to the sampling seat and the outer wall of the sampling seat, and a plurality of pairs of limit grooves matching the limit plates are provided on the outer wall of the sampling frame, and the plurality of pairs of limit grooves are distributed in a circular array.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. When sampling water quality, the present invention can install the sampling seat between multiple sampling racks, and then start the first motor. Under the cooperation of multiple opening and closing mechanisms, the sampled water can enter the sampling seat through multiple groups of water inlet grooves, and then start the second motor. At the same time, under the cooperation of multiple sampling structures, the sampled water enters the sampling seat, and the whole sampling barrel is divided into multiple sampling seats, which reduces the volume of the whole discharged water, thereby reducing the buoyancy of the whole sampling device, and can improve the convenience of sampling at the sampling seat, thereby improving the sampling efficiency. At the same time, the first motor and the second motor are both located above the water surface, which can avoid the risk of electric shock when the electrical equipment is immersed in water, and can significantly reduce the probability of electric shock accidents.

[0021] 2. When positioning the required sampling depth, the present invention can push multiple groups of limit plates to retract into multiple sampling seats respectively, and pull multiple sampling seats to move to the required sampling depth respectively. With the cooperation of the limit assembly, multiple sampling seats can be positioned respectively, which plays a role in positioning the sampling depth, effectively reduces the sampling limitations, can adapt to the needs of different sampling points, and reduce the time and labor costs in the sampling process. At the same time, it can avoid interference from suspended matter, algae, etc. in the upper water body during the sampling process, ensuring that the collected water samples can truly reflect the water quality of the target water layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] 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.

[0023] Figure 1 It is an overall stereogram of the sampling device of the present invention;

[0024] Figure 2 It is a front perspective view of the sampling rack of the present invention;

[0025] Figure 3 A front perspective view of the sampling seat of the present invention;

[0026] Figure 4 For the present invention Figure 3 A partial enlarged view of middle A;

[0027] Figure 5 The distribution diagram of the filling member of the present invention is

[0028] Figure 6A cross-sectional perspective view of the sampling seat of the present invention;

[0029] Figure 7 A bottom-up cross-sectional view of the sampling seat of the present invention;

[0030] Figure 8 For the present invention Figure 7 A partial enlarged view of B in the middle;

[0031] Fig. 9 It is a schematic diagram of the structure of the sampling seat of the present invention;

[0032] Fig.10 It is a schematic diagram of the sampling structure of the present invention;

[0033] Fig.11 It is a schematic diagram of the connection structure between the first belt loop and the second belt loop of the present invention;

[0034] Fig.12 It is a schematic diagram of the structure of the limit assembly of the present invention;

[0035] Fig.13 It is a schematic diagram of the one-way valve structure of the present invention.

[0036] In the figure: 1, sampling rack; 11, mounting column; 12, first transmission shaft; 13, second transmission shaft; 2, sampling seat;

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

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

[0039] 5. Limiting assembly; 51. Limiting plate; 52. Return spring; 53. Limiting groove. DETAILED DESCRIPTION

[0040] 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.

[0041] 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.

[0042] like Figures 1 to 13 As shown, according to one aspect of the present invention, a multi-depth sampling device for water body detection is provided, comprising 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 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 with a first motor via a rotating shaft. The top end of the second transmission shaft 13 is connected with a second motor via a rotating shaft. The sampling rack 1 is provided with a battery for powering the first motor and the second motor.

[0044] The opening and closing mechanism 3 includes a plurality of sealing plates 34 slidably connected to the inner wall of the sampling seat 2, a rack 33 is fixedly connected to the top of each sealing plate 34, a gear ring 32 is rotatably provided on the inner wall of the sampling seat 2, and the plurality of racks 33 are meshed with the gear ring 32, a transmission gear 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 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;

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

[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 pass through the sampling rack 1 and extend to the top of the sampling rack 1. The first motor is installed on the top of the sampling rack 1, and the second motor is installed on the top of the sampling rack 1, and the second motor is located on one side of the first motor.

[0047] A plurality of movable grooves are provided 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 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 connected to the outside of the sampling seat 2 are obliquely provided on the inner wall of the sampling groove 37, 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 an opening groove matching the sealing plate 34 is provided at the top of each movable groove, and 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.

[0048] A first rotating hole matching the first transmission shaft 12 is opened 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 opened on the side of the first transmission shaft 12 close to the multiple first clamping blocks 311, and the first clamping groove matches the multiple first clamping blocks 311.

[0049] 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.

[0050] A threaded groove matching the threaded rod 462 is provided inside the second belt loop 43, and the second belt loop 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 loop 42. A second clamping groove is provided on the side of the second transmission shaft 13 close to the multiple second clamping blocks 421, and the second clamping groove matches the multiple second clamping blocks 421.

[0051] A plurality of mounting posts 11 are clamped on the outside of the sampling frame 1 , and the plurality of mounting posts 11 are arranged in a circular array about the central axis of the sampling slot 37 , and the plurality of mounting posts 11 are all installed on the top of the riverbed.

[0052] When sampling water quality, the sampling rack 1 can be lifted between multiple mounting columns 11 by a lifting device. When the bottom end of the sampling rack 1 is in close contact with the riverbed, the multiple sampling seats 2 are completely immersed in the sampled water. At the same time, the multiple sets of sealing plates 34 can be in contact with the sampled water on the side away from the one-way valve 36. At this time, the sampling seat 2 can be left stationary to make the sampled water in a relatively static state. Its function is to prevent the sampled water from mixing in the upper and lower layers due to the descent of the sampling rack 1, thereby improving the accuracy of the sampling data. When the sampled water is in a relatively static state, the first motor can be started to drive the first transmission shaft 12 to rotate under the connection of the rotating shaft. Since the multiple first clamping blocks 311 fixedly arranged inside the multiple transmission gear rings 31 are all engaged with the first clamping grooves on the surface of the first transmission shaft 12, the first transmission shaft 12 drives the transmission gear ring 31 to rotate synchronously during transmission, and then drives the gear ring 32 meshing with the transmission gear ring 31 to rotate around the connection position with the sampling seat 2. Figure 6 As shown, the toothed ring 32 can rotate clockwise at this time, and the rotation of the toothed ring 32 drives the multiple racks 33 meshing therewith to slide, and at the same time 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, the notch of the opening groove. When the sealing plate 34 slides into the movable groove to open the water inlet groove 35, the sealing strip can seal the opening groove to prevent water from entering the annular cavity inside the sampling seat 2 through the movable groove, and to prevent water from being retained in the annular cavity for a long time to cause corrosion of parts. When the sealing plate 34 opens the water inlet groove 35, the sampled water can flow into the water inlet groove 35. At this time, the second motor can be started to drive the second transmission shaft 13 to rotate around the connection position with the sampling rack 1 under the connection with the rotating shaft. Since the second clamping blocks 421 fixedly arranged inside the plurality of first belt rings 42 are all engaged with the second clamping grooves 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, the second belt ring 43 can be driven to rotate under the connection with each belt body 44, such as Fig. 9 As shown, since the second belt ring 43 and the threaded rod 462 are threadedly connected, and since the upper plug rod 461 fixed at the top of the threaded rod 462 is slidably connected to the guide frame 45, the second belt ring 43 can drive the plug rod 46 to move upward while rotating, and at the same time drive the piston body 47 fixed at the bottom end of the plug rod 46 to slide upward, so that a negative pressure is generated between the top end of the sampling seat 2 and the bottom end of the piston body 47, so that the sampled water can enter the sampling seat 2 through multiple groups of water inlet grooves 35, thereby achieving the purpose of multi-layer sampling. At the same time, multiple independent sampling seats 2 are set 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 limit assemblies 5 are arranged on the outside of each sampling seat 2, and each limit assembly 5 includes a limit plate 51 that slides 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. The outer wall of the sampling rack 1 is provided with a plurality of pairs of limit grooves 53 that match the limit plates 51, and the plurality of pairs of limit grooves 53 are distributed in a circular array.

[0054] Before sampling, multiple groups of limit plates 51 can be pushed simultaneously to slide on the outer walls of multiple sampling seats 2 respectively, and multiple reset springs 52 can be squeezed and compressed respectively, and multiple sampling seats 2 can be pulled 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 opened on the surface of the first transmission shaft 12, and the second clamping block 421 fixed inside the first belt ring 42 can slide inside the second clamping groove opened on the surface of the second transmission shaft 13. Then, by loosening 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 the multiple limit grooves 53, which plays a role in positioning the sampling depth, and each sampling seat 2 can independently adjust its required sampling depth, thereby achieving the purpose of adapting to different sampling needs.

[0055] The working principle of the device is as follows: the plurality of limit plates 51 can be pushed simultaneously to slide on the outer walls of the plurality of sampling seats 2 respectively, and the plurality of reset springs 52 can be squeezed and compressed respectively, and the plurality of sampling seats 2 can be pulled to move to the required sampling depth respectively. In this process, the first clamping block 311 fixed inside the transmission gear ring 31 can slide inside the first clamping groove opened on the surface of the first transmission shaft 12, and the second clamping block 421 fixed inside the first belt ring 42 can slide inside the second clamping groove opened on the surface of the second transmission shaft 13. Then, the limit plates 51 are loosened, so that the plurality of limit plates 51 are pushed to reset under the elastic force of the reset springs 52, so that the plurality of limit plates 51 are respectively engaged with the plurality of limit grooves 53. When sampling, the sampling rack 1 can be lifted between the multiple mounting columns 11 by a lifting device. When the bottom end of the sampling rack 1 is in close contact with the riverbed, the multiple sampling seats 2 are completely immersed in the sampled water. At the same time, the multiple sets of sealing plates 34 can be in contact with the sampled water on the side away from the one-way valve 36. At this time, the sampling seat 2 can be left stationary so that the sampled water is in a relatively static state. Its function is to prevent the sampled water from mixing in the upper and lower layers due to the descent of the sampling rack 1, thereby improving the accuracy of the sampling data. When the sampled water is in a relatively static state, the first motor can be started to drive the first transmission shaft 12 to rotate under the connection with the rotating shaft. Since the multiple first clamping blocks 311 fixedly arranged inside the multiple transmission gear rings 31 are all connected to the first transmission shaft 12 on the surface of the first transmission shaft 12, The first transmission shaft 12 is engaged with a card slot, so that the first transmission shaft 12 drives the transmission gear ring 31 to rotate synchronously during transmission, and then drives the gear ring 32 meshing 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, and the rotation of the gear ring 32 drives the multiple racks 33 meshing with it to slide, and at the same time 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, the notch of the opening groove. When the sealing plate 34 slides into the movable groove to open the water inlet groove 35, the sealing strip can seal the opening groove to prevent water from entering the annular cavity inside the sampling seat 2 through the movable groove, so as to avoid water staying in the annular cavity for a long time and causing zero When the sealing plate 34 opens the water inlet trough 35, the sampled water can flow into the water inlet trough 35. At this time, the second motor can be started to drive the second transmission shaft 13 to rotate around the connection position with the sampling frame 1 under the connection with the rotating shaft. Since the second clamping blocks 421 fixedly arranged inside the plurality of first belt rings 42 are all engaged with the second clamping grooves provided 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, the second belt ring 43 can be driven to rotate under the connection with each belt body 44. Since the second belt ring 43 is connected to the threaded rod 462 through a threaded connection, and the upper plug 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 plug rod 46 to move upward while rotating, and at the same time drive the piston body 47 fixed at the bottom end of the plug rod 46 to slide upward, so that negative pressure can be generated between the top of the sampling seat 2 and the bottom end of the piston body 47, so that the sampled water can enter the interior of the sampling seat 2 through the multiple water inlet grooves 35. When the sampled water needs to be taken out, the sampling rack 1 can be lifted by the lifting equipment, and then the transport container can be placed under the one-way valve 36. By starting the second motor, the piston body 47 can push the sampled water with the cooperation of the sampling structure 4. At this time, the pressure inside the sampling seat 2 increases, the one-way valve 36 can be pushed open, and the sampled water can be discharged through the one-way valve 36.

[0056] 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 is only the preferred implementation method 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 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).

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.

8. A multi-depth sampling device for water body detection according to claim 3, characterized in that: 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.

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