Surface water substrate sampling equipment for environmental monitoring

Abstract

The invention provides surface water substrate sampling equipment for environmental monitoring. The surface water substrate sampling equipment comprises a supporting device, an automatic sampling mechanism, a driving mechanism and a rope, wherein the driving mechanism is mounted on the supporting device and is in transmission connection with the automatic sampling mechanism to drive the automatic sampling mechanism to move; the automatic sampling mechanism comprises a sampling barrel, a plurality of opening and closing sheets, a piston plate, a connecting rod and a push-pull mechanism for pushing the piston plate to move, the opening and closing sheets are uniformly hinged to the lower end of the sampling barrel, each opening and closing sheet is of a curved-surface triangular structure, and the side length of the top of each triangular structure is of an arc-shaped side structure; the middle part of the top side is hinged to the lower end edge of the sampling barrel through a hinge; according to the invention, a person does not need to enter the river bottom for sampling, the deepwater river bottom can be sampled on the shore, and the safety is high; the opening and closing sheet is automatically opened and closed through the push-pull mechanism, so that automatic sampling is realized, manual sampling is not needed, manpower is saved, and the sampling efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of environmental detection, and particularly belongs to a surface water bottom sediment sampling device for environmental monitoring. BACKGROUND

[0002] The surface water bottom sediment generally refers to the accumulated substances at the bottom of water bodies such as rivers and lakes, which may contain various pollutants and harmful substances such as heavy metals, organic pollutants, and pathogens, and thus it is necessary to sample the bottom sediment, detect the bottom sediment samples, and study the accumulation, distribution, transformation, and migration of pollutants discharged into the water body in the bottom sediment, and study whether it will have a serious impact on the environment and human health; the Chinese invention patent with the application number 202420198790.8 and the patent name of a river silt sampling device inserts the closed cover and the sampling cylinder into the silt in the river, at this time the silt flows into the inside of the sampling cylinder and the inside of the closed cover, then the closed cover can block the bottom of the sampling cylinder, finally the fixed rod and the support rod are pulled up by the pressing assembly to rise and separate from the river surface, thereby completing the sampling of the river silt; when the sampling device of the prior art is inserted into the silt, the closed cover pushes the silt away in all directions, and then the silt automatically flows into the sampling cylinder and the closed cover, however, the silt in some rivers has high viscosity and poor flowability, and the sampling efficiency is low by relying on the self-flow of the silt, and it is difficult to obtain the silt at the bottom of the river, and currently the silt sampling at the bottom of the deep water river has high risk of human sampling under water, or the existing deep water river bottom sampling device has simple structure and poor sampling effect. SUMMARY

[0003] In order to overcome the problems in the background art, the present application provides a surface water bottom sediment sampling device for environmental monitoring to solve the technical problem that the sampling device of the prior art in the background art lets the silt automatically flow into the sampling cylinder 211 and the closed cover, however, the bottom sediment in some water bodies has high viscosity and poor flowability, and the sampling efficiency is low by relying on the self-flow of the bottom sediment.

[0004] To achieve the above-mentioned purpose, the present application realizes the following technical scheme: A surface water bottom sediment sampling device for environmental monitoring, comprising a support device 1, an automatic sampling mechanism 2, a drive mechanism 3 installed on the support device 1 and drivingly connected with the automatic sampling mechanism 2 to drive the automatic sampling mechanism 2 to move, and a rope 4 connected to the drive mechanism 3. The automatic sampling mechanism 2 comprises a sampling cylinder 21, an opening and closing sheet 22, a piston plate 23, a connecting rod 24, a push-pull mechanism 25 for pushing the piston plate 23 to move, the opening and closing sheet 22 is provided with a plurality of uniform hinges at the lower end of the sampling cylinder 21, the opening and closing sheet 22 is a curved triangular structure, the length of the top of the triangular structure is an arc-shaped edge structure, and the middle of the top length is hinged to the edge of the lower end of the sampling cylinder 21; when the plurality of opening and closing sheets 22 are folded inward, the arc-shaped edge is fitted with the circular edge of the lower end of the sampling cylinder 21, and the side edges of adjacent opening and closing sheets 22 abut to form a conical structure, closing the lower end of the sampling cylinder 21; the piston plate 23 is slidingly installed in the sampling cylinder 21, the connecting rod 24 is provided with a plurality of connecting rods respectively connected with each opening and closing sheet 22, the connecting rod 24 is hinged at the inner side of the opening and closing sheet 22 and the bottom of the piston plate 23 at both ends respectively, and the push-pull mechanism 25 is connected at the top of the piston plate 23.

[0005] Preferably, the outer side of the opening and closing sheet 22 is provided with a protection ring 5 sleeved outside the opening and closing sheet 22 for blocking the outward turning of the opening and closing sheet 22, the protection ring 5 is fixedly connected to the side wall of the sampling cylinder 21 through the connecting plate 51; the lower end of the protection ring 5 is uniformly provided with a protrusion 52, and the protrusion 52 protrudes from the lower end of the opening and closing sheet 22.

[0006] Preferably, the push-pull mechanism 25 comprises a square telescopic rod 251, a lead screw 252 and a motor 253; the square telescopic rod 251 is slidingly installed on the fixed plate 6 provided at the top of the sampling cylinder 21, and the lower end is fixedly connected to the piston plate 23; the lead screw 252 is threadedly connected in the square telescopic rod 251 from the upper end of the square telescopic rod 251; the upper part of the lead screw 252 is rotatably installed on the U-shaped support frame 211 installed at the top of the sampling cylinder 21, and the motor 253 is installed on the support frame 211 and connected with the upper end of the lead screw 252 through a worm gear transmission.

[0007] Preferably, the support device 1 comprises a counterweight ring 11 and a mounting ring 12, the counterweight ring 11 is located below the mounting ring 12 and coaxially arranged with the mounting ring 12, and the counterweight ring 11 and the mounting ring 12 are connected through a support column 13, the driving mechanism 3 is installed on the mounting ring 12, and the lower end of the sampling cylinder 21 penetrates through the mounting ring 12.

[0008] Preferably, the driving mechanism 3 comprises a fixed ring 31, a guide rod 32, a motor two 33, a threaded rod 34, and a mounting plate 35; the fixed ring 31 is mounted on the mounting ring 12 by bolts, the lower ends of the guide rod 32 and the threaded rod 34 are connected to the fixed ring 31, the mounting plate 35 is connected to the upper ends of the guide rod 32 and the threaded rod 34, the threaded rod 34 is rotatably connected to the fixed ring 31 and the mounting plate 35 through bearings at both ends, the motor two 33 is mounted on the mounting plate 35 and connected to the upper end of the threaded rod 34 through a worm gear transmission, the sampling cylinder 21 is slidably mounted in the inner hole of the fixed ring 31 and passes through the mounting ring 12, the guide rod 32 and the threaded rod 34 are slidably connected and threadedly connected to the fixed disc 212 provided on the top outer edge of the sampling cylinder 21 respectively, and the rope 4 is connected to the mounting plate 35.

[0009] Preferably, the piston plate 23 is provided with air holes 231.

[0010] Preferably, the sampling cylinder 21 is also slidably mounted with a push plate 7 for pushing the sludge, the push plate 7 is located below the piston plate 23, the push plate 7 is provided with a strip-shaped hole 71 for the connecting rod 24 to pass through, the top of the push plate 7 is connected with a push rod 72 for moving the push plate 7, and the push rod 72 passes through the air holes 231 in the piston plate 23 and is slidably connected to the support frame 211.

[0011] Preferably, the upper end of the push rod 72 is fixedly connected with a push handle 73 for pushing the push rod 72.

[0012] Preferably, the mounting ring 12 is connected with two stable rods 8, and the upper ends of the two stable rods 8 are connected to the two ends of the mounting plate 35 by bolts.

[0013] Preferably, the inner side of the support column 13 is mounted with a lighting lamp 9 and a camera 10, the rope 4 is provided with a cable 100 along the rope 4, the cable 100 is bundled with the rope 4, and the cable 100 is used for supplying power to the lighting lamp 9, the camera 10, the motor one 253 and the motor two 33, transmitting image signals shot by the camera 10, and controlling the working of the motor one 253 and the motor two 33, and the rear end of the cable 100 is connected with a power supply and a control end.

[0014] The present application has the following advantages: 1. The sampling device of the present application is put into the river bottom, the device is slowly put into the river bottom and pulled out of the river bottom through the rope 4, the collection of the river bottom sediment is completed, the support device 1 plays a supporting role, the automatic sampling mechanism 2 is inserted into the sludge for sludge sampling under the support of the support device 1, then the device is pulled out of the water surface to take out the sludge sample, and the river bottom sediment sampling is completed, the device does not need to be manually put into the river bottom for sampling, the sampling of the deep water river bottom can be carried out on the shore, and the safety is high. 2, The application drives the sampling cylinder 21 to automatically descend through the driving mechanism 3, the convex teeth 52 at the lower end of the protection ring 5 can help the sampling cylinder 21 to insert into the silt, reduce the resistance of the sampling cylinder 21 to insert into the silt, and have better effect on relatively hard bottom sampling, the opening and closing piece 22 is automatically opened and closed through the push-pull mechanism 25, so that automatic sampling is realized, manual sampling is not needed, manpower is saved, and the sampling efficiency is improved. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is a three-dimensional structural schematic diagram of the application.

[0016] Figure 2 is a structural schematic diagram of the support device and the automatic sampling mechanism.

[0017] Figure 3 is a partial sectional three-dimensional structural schematic diagram of the automatic sampling mechanism.

[0018] Figure 4 is a structural schematic diagram of the push-pull mechanism.

[0019] Figure 5 is a structural schematic diagram of the support device.

[0020] Figure 6 is a structural schematic diagram of the driving mechanism.

[0021] Figure 7 is a partial sectional three-dimensional structural schematic diagram of the automatic sampling mechanism Figure 1 .

[0022] Figure 8 is a partial sectional three-dimensional structural schematic diagram of the automatic sampling mechanism Figure 2 .

[0023] Figure 9 is a structural schematic diagram of the device of embodiment 2. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical scheme and beneficial effects of the application clearer, the preferred embodiments of the application will be described in detail below with reference to the drawings, so as to facilitate the understanding of the technicians.

[0025] Embodiment 1 As Figures 1-9 shown, an environmental monitoring surface water bottom sampling device, comprising a support device 1, an automatic sampling mechanism 2, a driving mechanism 3 installed on the support device 1 and drivingly connected with the automatic sampling mechanism 2 to drive the automatic sampling mechanism 2 to move, a rope 4 connected to the driving mechanism 3; The automatic sampling mechanism 2 comprises a sampling cylinder 21, an opening and closing sheet 22, a piston plate 23, a connecting rod 24, a push-pull mechanism 25 for pushing the piston plate 23 to move, the opening and closing sheet 22 is provided with a plurality of uniform hinges at the lower end of the sampling cylinder 21, the opening and closing sheet 22 is a curved triangular structure, the length of the top of the triangular structure is an arc-shaped edge structure, and the middle of the top length is hinged to the lower end edge of the sampling cylinder 21 by a hinge; when the plurality of opening and closing sheets 22 are folded inward, the arc-shaped edge is fitted with the lower end of the sampling cylinder 21, and the side edges of adjacent opening and closing sheets 22 abut to form a conical structure, closing the lower end of the sampling cylinder 21; the piston plate 23 is slidingly installed in the sampling cylinder 21, the connecting rod 24 is provided with a plurality of connecting rods respectively connected with each opening and closing sheet 22, the connecting rod 24 is hinged at the inner side of the opening and closing sheet 22 and the bottom of the piston plate 23 respectively at both ends, and the push-pull mechanism 25 is connected at the top of the piston plate 23.

[0026] When the device is used, when the bottom sediment of the deep water river is sampled, the staff gets on the boat and slowly puts the device into the river bottom through the rope 4, the supporting device 1 is supported on the river bottom to play a supporting role, the automatic sampling mechanism 2 is driven to descend by the driving mechanism 3, the lower end is inserted into the bottom sediment to perform sampling work; the opening and closing sheet 22 can be controlled to open or fold by the push-pull mechanism 25, the opening and closing sheet 22 is opened by the push-pull mechanism 25 before the sampling cylinder 21 is put into the river bottom, the sampling cylinder 21 is inserted into the silt, the lower end of the opening and closing sheet 22 is a sharp end, when the sampling cylinder 21 is inserted into the silt, the resistance can be reduced, after the sampling cylinder 21 is inserted into the silt, the silt is automatically circled in the sampling cylinder 21, then the piston plate 23 is pulled by the push-pull mechanism 25, the opening and closing sheet 22 is pulled to fold by the piston plate 23 through the connecting rod 24, the lower end of the sampling cylinder 21 is closed, so that the silt is retained in the sampling cylinder 21, then the sampling cylinder 21 is pulled out of the silt by the driving mechanism 3, then the device is pulled out of the river bottom by the rope 4, the opening and closing sheet 22 is opened by the push-pull mechanism 25, so that the bottom sediment sample in the sampling cylinder 21 is taken out. The device does not need to be manually taken into the river bottom for sampling, the sampling of the deep water river bottom can be performed on the bank, the safety is higher; the opening and closing sheet 22 is automatically opened and folded by the push-pull mechanism 25, so that automatic sampling is realized, manual sampling is not needed, manpower is saved, and the sampling efficiency is improved.

[0027] As Figure 3As shown, the opening and closing piece 22 is provided with a protective ring 5 outside the opening and closing piece 22 for blocking the outward turning of the opening and closing piece 22, the protective ring 5 is fixedly connected to the side wall of the sampling cylinder 21 through the connecting plate 51; the lower end of the protective ring 5 is uniformly provided with a protruding tooth 52 which protrudes from the lower end of the opening and closing piece 22. When the sampling cylinder 21 is inserted into the silt, the protruding tooth 52 at the lower end of the protective ring 5 protruding from the lower end of the opening and closing piece 22 can play a guiding role, and can be more smoothly inserted into the silt, and the operation is more labor-saving. When encountering hard mud blocks, it can play a crushing role. When encountering hard objects such as stones, it can protect the opening and closing piece 22, avoid the opening and closing piece 22 from being deformed due to impact, affect its function, and the protective ring 5 can limit the protection of the opening and closing piece 22, avoid the opening and closing piece 22 from turning outward when moving downward, and cause damage to the opening and closing piece 22.

[0028] As shown in Figure 4 , 7 , the push-pull mechanism 25 includes a square telescopic rod 251, a lead screw 252, and a motor 253; the square telescopic rod 251 is slidingly installed on the fixed plate 6 provided at the top of the sampling cylinder 21, and the lower end is fixedly connected to the piston plate 23; the lead screw 252 is threadedly connected to the square telescopic rod 251 from the upper end of the square telescopic rod 251; the upper part of the lead screw 252 is rotatably installed on the U-shaped support frame 211 installed at the top of the sampling cylinder 21, and the motor 253 is installed on the support frame 211 and is in transmission connection with the upper end of the lead screw 252 through a worm gear. The motor 253 drives the lead screw 252 to threadedly rotate in the square telescopic rod 251, so that the square telescopic rod 251 slides along the fixed plate 6 and pushes the piston plate 23 downward to move, so that the connecting rod 24 pushes the opening and closing piece 22 to open. When the silt enters the sampling cylinder 21, the motor 253 is controlled to reverse to make the square telescopic rod 251 rise and pull the opening and closing piece 22 to close, so as to save the silt in the sampling cylinder 21. Then the sampling cylinder 21 is pulled out of the silt upward through the driving mechanism 3, so as to sample the silt.

[0029] As shown in Figure 5 , the support device 1 includes a counterweight ring 11 and a mounting ring 12, the counterweight ring 11 is located below the mounting ring 12 and is coaxially arranged with the mounting ring 12, and the counterweight ring 11 and the mounting ring 12 are connected through a support column 13, the driving mechanism 3 is installed on the mounting ring 12, and the lower end of the sampling cylinder 21 penetrates the mounting ring 12. The counterweight ring 11 can increase the gravity center, so that the sampling cylinder 21 is more stable when inserted into the silt, and the sampling cylinder 21 is driven by the driving mechanism 3 to move downward and penetrate the mounting ring 12 to sample the silt.

[0030] As shown in Figure 6As shown, the driving mechanism 3 includes a fixed ring 31, a guide rod 32, a motor two 33, a threaded rod 34, a mounting plate 35; the fixed ring 31 is installed on the mounting ring 12 by bolts, the lower ends of the guide rod 32 and the threaded rod 34 are connected to the fixed ring 31, the mounting plate 35 is connected to the upper ends of the guide rod 32 and the threaded rod 34, the threaded rod 34 is rotatably connected to the fixed ring 31 and the mounting plate 35 through bearings at both ends; the motor two 33 is installed on the mounting plate 35 and connected to the upper end of the threaded rod 34 through a worm gear transmission; the sampling cylinder 21 is slidingly installed in the inner hole of the fixed ring 31 and passes through the mounting ring 12; the guide rod 32 and the threaded rod 34 are slidingly connected and threadedly connected with the fixed disc 212 provided on the top outer edge of the sampling cylinder 21 respectively; the rope 4 is connected to the mounting plate 35. The motor two 33 drives the threaded rod 34 to rotate through the worm gear structure, and since the threaded rod 34 is threadedly connected with the fixed disc 212 on the sampling cylinder 21, the sampling cylinder 21 is driven to slide downward in the fixed ring 31 along with the guide rod 32 and the threaded rod 34, and is inserted into the river bottom sludge for sampling. After the sludge sample is taken, the motor two 33 is controlled to reverse, so that the sampling cylinder 21 rises and is pulled out of the sludge.

[0031] As shown in Figure 7 , the piston plate 23 is provided with a ventilation hole 231. The ventilation hole 231 can discharge the air in the sampling cylinder 21 and the river water when the sampling cylinder 21 is inserted into the sludge, so that the sludge automatically enters the sampling cylinder 21.

[0032] As shown in Figure 7 , the sampling cylinder 21 is also slidingly installed with a push plate 7 for pushing out the sludge, the push plate 7 is located below the piston plate 23, the push plate 7 is provided with a strip-shaped hole 71 through which the connecting rod 24 passes, the top of the push plate 7 is connected with a push rod 72 for moving the push plate 7, and the push rod 72 slidingly connects to the support frame 211 through the ventilation hole 231 on the piston plate 23. After the device is pulled out of the river, the opening and closing are first opened by the push-pull mechanism 25, the sludge with good fluidity can flow out of the sampling cylinder 21 by itself, and the sludge with poor fluidity can be pushed out of the sampling cylinder 21 by the push plate 7 pushed by the push rod 72, so as to improve the efficiency of sludge sampling.

[0033] As shown in Figure 7 , the upper end of the push rod 72 is fixedly connected with a push handle 73 for pushing the push rod 72.

[0034] As shown in Figure 2 , the mounting ring 12 is connected with two stable rods 8, and the upper ends of the two stable rods 8 are connected with the two ends of the mounting plate 35 through bolts. The mounting plate 35 of the driving mechanism 3 is connected with the mounting ring 12 through the two stable rods 8, so as to improve the stability of the driving mechanism 3 and the automatic sampling mechanism 2 installed on the support device 1.

[0035] As Figure 5 shown, the support column 13 inside is mounted with lighting lamp 9 and camera 10, the rope 4 along the rope 4 is provided with the cable 100 which is bundled together with the rope 4 to supply power for the lighting lamp 9, the camera 10, the motor one 253, the motor two 33 and transmit the image signal shot by the camera 10 and the control signal to control the motor one 253 and the motor two 33 to work, the rear end of the cable 100 is connected with the power supply and the control end. Through the lighting lamp 9, the river bottom can be illuminated, the camera 10 transmits the sampling image of the sampling cylinder 21 to the control end on the shore through the cable 100, which is convenient for viewing the real-time situation of sampling and controlling the depth of the sampling cylinder 21 inserted into the silt. The control end can also transmit control signals to the motor one 253 and the motor two 33 through the cable 100 to control the work, stop and forward and reverse rotation of the motor one 253 and the motor two 33.

[0036] Working process: When the device is used, the staff gets on the boat and rows into the river, and then slowly puts the device into the river bottom through the rope 4. The support device 1 is supported on the river bottom to play a supporting role. The control end sends signals to start the motor two 33 through the cable 100 to drive the threaded rod 34 to rotate through the worm gear structure, so that the sampling cylinder 21 descends along the fixed ring 31 and the guide rod 32 to insert into the silt for sampling. Then the piston plate 23 is pulled by the push-pull mechanism 25, the piston plate 23 pulls the opening and closing piece 22 to close through the connecting rod 24, so as to retain the silt in the sampling cylinder 21. The motor two 33 is reversed to make the sampling cylinder 21 rise out of the river silt. Then the device is pulled out of the river bottom through the rope 4. The container for holding samples is placed below the sampling cylinder 21. The opening and closing piece 22 is opened through the push-pull mechanism 25. The silt with good fluidity can flow out of the sampling cylinder 21 by itself, and the silt with poor fluidity can be pushed out of the sampling cylinder 21 by the push plate 7 pushed by the push rod 72, so as to take out the bottom sample in the sampling cylinder 21.

[0037] Example 2 The driving mechanism 3 of the sampling device is connected with the supporting device 1 by bolts, when the river water in the river channel is shallow, the driving mechanism 3 is taken off from the supporting device 1, the automatic sampling mechanism 2 is taken off from the supporting device 1 with the driving mechanism 3, the length of the sampling cylinder 21 extending from the fixed ring 31 is adjusted by the motor 2 33, then the sampling cylinder 21 is thrown into the river channel, the sampling cylinder 21 is automatically inserted into the river bottom silt by the gravity of the device, then the piston plate 23 is pulled by the push-pull mechanism 25, the open-close sheet 22 is closed by the piston plate 23 through the connecting rod 24, the lower end of the sampling cylinder 21 is closed, so that the silt is retained in the sampling cylinder 21, then the device is pulled out from the river bottom by the rope 4, so that the sampling method for the river bottom silt with shallow river water is simpler, when the river water is deep, the sampling cylinder 21 cannot be inserted into the silt by the gravity of the device due to the buoyancy of the river water, so the sampling cylinder 21 is automatically inserted into the river bottom silt by the driving mechanism 3 under the support of the supporting device 1 in the embodiment 1.

[0038] Finally, it should be pointed out that the above preferred embodiments are only used to illustrate the technical solutions of the present application but not limit the present application, although the present application has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made in form and details without departing from the scope defined by the claims of the present application.

Claims

1. An apparatus for sampling the bottom of surface water for environmental monitoring, characterized by: The application relates to a support device (1), an automatic sampling mechanism (2), a driving mechanism (3) installed on the support device (1) and in transmission connection with the automatic sampling mechanism (2) to drive the automatic sampling mechanism (2) to move, and a rope (4) connected to the driving mechanism (3); the automatic sampling mechanism (2) comprises a sampling cylinder (21), opening and closing sheets (22), a piston plate (23), a connecting rod (24) and a push-pull mechanism (25) for pushing the piston plate (23) to move; the opening and closing sheets (22) are uniformly hinged to the lower end of the sampling cylinder (21); the opening and closing sheets (22) are in the shape of curved triangles, the top of the triangle is in the shape of an arc, and the middle of the top is hinged to the lower end of the sampling cylinder (21) through a hinge; when the opening and closing sheets (22) are folded inward, the arc-shaped top is attached to the lower end of the sampling cylinder (21), and the side edges of adjacent opening and closing sheets (22) abut to form a conical structure, so that the lower end of the sampling cylinder (21) is closed; the piston plate (23) is slidingly installed in the sampling cylinder (21); the connecting rod (24) is provided with a plurality of connecting rods (24) connected with the opening and closing sheets (22) respectively; the two ends of the connecting rod (24) are hinged to the inner side of the opening and closing sheet (22) and the bottom of the piston plate (23) respectively; and the lower end of the push-pull mechanism (25) is connected to the top of the piston plate (23).

2. The surface water bottom sampling device for environmental monitoring according to claim 1, characterized in that: The outer side of the opening and closing sheet (22) is provided with a protection ring (5) sleeved outside the opening and closing sheet (22) for blocking the outward turning of the opening and closing sheet (22); the protection ring (5) is fixedly connected to the side wall of the sampling cylinder (21) through a connecting plate (51); the lower end of the protection ring (5) is uniformly provided with a plurality of protruding teeth (52) protruding from the lower end of the opening and closing sheet (22).

3. The surface water bottom sampling device for environmental monitoring according to claim 1 or 2, characterized in that: The push-pull mechanism (25) comprises a square telescopic rod (251), a lead screw (252) and a motor (253); the square telescopic rod (251) is slidingly installed on a fixed plate (6) arranged at the top of the sampling cylinder (21) and is fixedly connected to the piston plate (23) at the lower end; the lead screw (252) is threadedly connected in the square telescopic rod (251) from the upper end of the square telescopic rod (251); the upper part of the lead screw (252) is rotatably installed on a U-shaped support frame (211) arranged at the top of the sampling cylinder (21); and the motor (253) is installed on the support frame (211) and is in transmission connection with the upper end of the lead screw (252) through a worm gear.

4. The surface water bottom sampling device for environmental monitoring according to claim 3, characterized in that: The support device (1) comprises a counterweight ring (11) and a mounting ring (12); the counterweight ring (11) is located below the mounting ring (12) and is coaxially arranged with the mounting ring (12); the counterweight ring (11) and the mounting ring (12) are connected through a support column (13); the driving mechanism (3) is installed on the mounting ring (12); and the lower end of the sampling cylinder (21) penetrates through the mounting ring (12).

5. The surface water bottom sediment sampling device for environmental monitoring according to any one of claims 1, 2, 4, characterized in that: The driving mechanism (3) comprises a fixed ring (31), a guide rod (32), a motor two (33), a threaded rod (34), and a mounting plate (35); the fixed ring (31) is mounted on the mounting ring (12) by bolts, the lower ends of the guide rod (32) and the threaded rod (34) are connected to the fixed ring (31), the mounting plate (35) is connected to the upper ends of the guide rod (32) and the threaded rod (34), the threaded rod (34) is rotatably connected to the fixed ring (31) and the mounting plate (35) through bearings at both ends; the motor two (33) is mounted on the mounting plate (35) and connected to the upper end of the threaded rod (34) through a worm gear transmission; the sampling cylinder (21) is slidingly mounted in the inner hole of the fixed ring (31) and passes through the mounting ring (12); the guide rod (32) and the threaded rod (34) are slidingly connected and threadedly connected with the fixed disc (212) provided on the top outer edge of the sampling cylinder (21) respectively; the rope (4) is connected to the mounting plate (35).

6. The surface water bottom sampling equipment for environmental monitoring according to claim 1, characterized in that: The piston plate (23) is provided with a ventilation hole (231).

7. The surface water bottom sampling equipment for environmental monitoring according to claim 6, characterized in that: The sampling cylinder (21) further slidingly mounts a push plate (7) for pushing the sludge, the push plate (7) is located below the piston plate (23), the push plate (7) is provided with a strip-shaped hole (71) for facilitating the connection rod (24) to pass through, the top of the push plate (7) is connected with a push rod (72) for pushing the push plate (7) to move, the push rod (72) slidingly connects to the support frame (211) through the ventilation hole (231) on the piston plate (23).

8. The surface water bottom sampling device for environmental monitoring according to claim 7, characterized in that: The upper end of the push rod (72) is fixedly connected with a push handle (73) for facilitating the push rod (72) to be pushed.

9. The surface water bottom sampling equipment for environmental monitoring according to claim 4, characterized in that: The mounting ring (12) is connected with two stable rods (8), the upper ends of the two stable rods (8) are connected to the two ends of the mounting plate (35) by bolts.

10. The surface water bottom sampling device for environmental monitoring according to claim 5, characterized in that: The inner side of the support column (13) is provided with a lighting lamp (9) and a camera (10), the rope (4) is provided with a cable (100) along the rope (4), the cable (100) is bundled with the rope (4), and the cable (100) is used for supplying power to the lighting lamp (9), the camera (10), the motor one (253), and the motor two (33), transmitting image signals shot by the camera (10), and controlling signals for controlling the motor one (253) and the motor two (33) to work, and the rear end of the cable (100) is connected with a power supply and a control end.

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