Evaluation system and method for environmental nitrogen load of urban agglomeration in middle and lower reaches of Yangtze River

Abstract

The invention discloses a system and a method for evaluating environmental nitrogen load of urban agglomerates in the middle and lower reaches of Yangtze River. The system comprises a plurality of nitrogen content acquisition modules; the evaluation analysis module is electrically connected with the nitrogen content acquisition module; the monitoring terminal is electrically connected with the evaluation analysis module; the nitrogen content acquisition module comprises an assembly column; the rotating rod is movably arranged in the assembling column, detection heads are arranged on the two sides of the outer wall of the rotating rod, the detection head on one side is electrically connected with a first sensor, the detection head on the other side is electrically connected with a second sensor, and a through opening allowing the detection heads to penetrate out is formed in the outer wall of one side of the assembling column; one end of the connecting rod is connected with the rotating rod, and the other end extends above the assembling column; and the driving piece is arranged in the assembling column. The nitrogen content acquisition module integrates a water area detection function and a soil detection function, the monitoring requirements of two different media can be met by only carrying one set of equipment, the number and weight of the equipment are reduced, and meanwhile, the use cost is also reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of environmental assessment, and in particular to an assessment system and method for the environmental nitrogen load of a city cluster in the middle and lower reaches of the Yangtze River. Background Art

[0003] At present, in the field of monitoring and evaluation of environmental nitrogen load, a variety of technical means have been widely used. For example, in the waters and soils of the middle and lower reaches of the Yangtze River urban agglomeration, nitrogen content data can be collected in real time by installing nitrogen content collection equipment, and nitrogen load evaluation can be performed by analyzing the nitrogen content data. Although this method can evaluate nitrogen load, due to the significant differences in the physical and chemical properties of waters and soils, different types of nitrogen content collection equipment need to be used. For monitoring personnel, this not only means that more equipment needs to be carried in the preparation stage, which increases the inconvenience of carrying and the complexity of operation, but also increases the cost of use. To this end, we propose an evaluation system and method for environmental nitrogen load in the middle and lower reaches of the Yangtze River urban agglomeration. Summary of the invention

[0004] The purpose of the present invention is to provide a system and method for evaluating the environmental nitrogen load of urban agglomerations in the middle and lower reaches of the Yangtze River, so as to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] An evaluation system for environmental nitrogen load in the middle and lower reaches of the Yangtze River urban agglomeration, including:

[0007] Several nitrogen content collection modules are used to collect nitrogen content data of water area and soil in the area to be evaluated;

[0008] An evaluation and analysis module, electrically connected to the nitrogen content acquisition module, for analyzing the collected nitrogen content data and providing a nitrogen load evaluation result of the area to be evaluated; and a monitoring terminal, electrically connected to the evaluation and analysis module, for receiving the nitrogen load evaluation result; the nitrogen content acquisition module includes:

[0009] An assembly column, an insert is provided at the lower end thereof, and a transmission control unit electrically connected to the evaluation and analysis module is provided on the assembly column;

[0010] A rotating rod is movably arranged in the assembly column, and detection heads are arranged on both sides of the outer wall of the rotating rod. The detection head on one side is electrically connected to a sensor 1 for detecting nitrogen data in the water area, and the detection head on the other side is electrically connected to a sensor 2 for detecting nitrogen data in the soil. A through hole is opened on the outer wall of one side of the assembly column for the detection head to pass through;

[0011] A connecting rod, one end of which is connected to the rotating rod, and the other end of which extends above the mounting column and is connected to the hand wheel; and

[0012] The driving member is electrically connected to the transmission control unit, is arranged in the assembly column, and is used to drive the connecting rod to make the detection head pass through the through opening.

[0013] A further improvement is that a transverse opening is opened on the top of the assembly column, a sliding block is slidably provided in the transverse opening, the sliding block is connected to an inner wall of one side of the transverse opening by an elastic member, the sliding block is movably sleeved on the outer wall of the connecting rod, and the connecting rod is detachably fixedly connected to the sliding block by a fixing member.

[0014] A further improvement is that the driving member comprises:

[0015] A contact rod, one end of which is movably sleeved on the outer wall of the connecting rod, and the other end of which is embedded with a ball;

[0016] A wedge block is movably disposed in the assembly column, and the inclined surface of the wedge block abuts against the ball; and

[0017] The telescopic device is arranged in the assembly column, and its output end is connected with the wedge block to drive the wedge block to move vertically.

[0018] A further improvement is that it also includes a detection head cleaning unit, and the detection head cleaning unit includes:

[0019] A hollow shell is arranged on the inner wall of one side of the assembly column, and a movable opening is formed through the hollow shell which is connected with the through opening and through which the detection head can pass;

[0020] A plurality of nozzle groups are arranged in the hollow shell, wherein the nozzle groups include two nozzle groups, and the two nozzle groups are symmetrically arranged above and below the axis of the movable port; and,

[0021] The liquid supply mechanism is arranged on the assembly column and is used for connecting with the nozzle group.

[0022] A further improvement is that the liquid supply mechanism comprises:

[0023] A liquid storage tank is arranged on the assembly column and is used to store cleaning liquid;

[0024] A liquid pumping mechanism is arranged on the inner wall of the assembly column and connected to the connecting rod. The input end of the liquid pumping mechanism is connected to the liquid storage tank through a pipeline, and the output end of the liquid pumping mechanism is connected to the diverter through a pipeline. The diverter is connected to the nozzle group through a pipeline. The liquid pumping mechanism is used to extract the cleaning liquid in the liquid storage tank when the connecting rod drives the detection head to move toward the through port, and to inject the cleaning liquid into the liquid outlet pipe and the diverter when the connecting rod drives the detection head to reset, so that the cleaning liquid is sprayed out from the nozzle group; and

[0025] The liquid collecting chamber is opened in the assembly column and located below the inner cavity thereof, and the liquid collecting chamber is communicated with the hollow shell through a pipeline.

[0026] A further improvement is that the liquid extraction mechanism comprises:

[0027] A compression cylinder, one end of which is hollow and the other end of which is connected to the inner wall of the assembly column, wherein the compression cylinder has an input end and an output end, and a one-way valve is disposed in both the input end and the output end; and

[0028] The piston member comprises a piston movably arranged in the compression cylinder and a piston rod with one end connected to the piston and the other end movably connected to the connecting rod.

[0029] A further improvement is that the diameter of the through opening is larger than the diameter of the detection head, a sealing seat is provided in the through opening, a soil-breaking block is rotatably provided at the outer end of the sealing seat, one end of the soil-breaking block extends into the sealing seat, the sealing seat is connected to the hollow shell through an elastic connecting piece, a driving gear group is rotatably provided in the sealing seat, the driving gear group is transmission-connected with one end of the soil-breaking block located in the sealing seat, a pull rope is wound around the shaft of the driving gear group, the other end of the pull rope passes through the sealing seat and is connected to the hollow shell after bypassing the guide wheel group provided in the sealing seat, and is used to drive the driving gear group to drive the soil-breaking block to rotate when the sealing seat is moved outward against the top of the detection head.

[0030] A further improvement is that at least two groups of detection heads are provided on both sides of the outer wall of the rotating column, and the at least two groups of detection heads are respectively provided at the upper and lower ends of the outer wall of the rotating column.

[0031] A further improvement is that the transmission control unit includes a control module electrically connected to sensor one, sensor two and the telescopic device, and a wireless communication module electrically connected to the control module, sensor one, sensor two, the evaluation and analysis module and the monitoring terminal.

[0032] A method for evaluating the environmental nitrogen load of the urban agglomeration in the middle and lower reaches of the Yangtze River, using the above-mentioned evaluation system, comprises the following steps:

[0033] S1: Divide soil monitoring sampling points and water monitoring sampling points at different locations in the area to be evaluated, and install nitrogen content collection modules at the soil monitoring sampling points and water monitoring sampling points respectively;

[0034] S2: The nitrogen content acquisition module sends the collected water area nitrogen content data or soil nitrogen content data to the evaluation and analysis module, which analyzes the collected nitrogen content data and gives the nitrogen load evaluation result of the area to be evaluated; wherein, when the nitrogen content acquisition module is installed at the soil monitoring sample point, the rotating column is rotated by the rotating rod so that the detection head electrically connected to the second sensor faces the through-port, and the assembly column is inserted into the soil of the soil monitoring sample point through the insert; when the nitrogen content acquisition module is installed at the water area monitoring sample point, the rotating column is rotated by the rotating rod so that the detection head electrically connected to the first sensor faces the through-port, and the assembly column is inserted into the underwater soil of the water area monitoring sample point through the insert, and when in use, the detection head is driven through the through-port by the driving member to collect the nitrogen content data.

[0035] Compared with the prior art, the present invention has the following beneficial effects:

[0036] The present invention evaluates the nitrogen load of the area to be evaluated through a nitrogen content collection module, an evaluation and analysis module and a monitoring terminal. The rotating rod in the nitrogen content collection module is provided with detection heads respectively connected with a sensor for detecting nitrogen data in the water area and a sensor for detecting nitrogen data in the soil. The user only needs to adjust the required detection head to correspond to the through-port on the assembly column according to the actual needs of the monitoring area (water area or soil), and then drive the detection head to extend from the through-port through the driving member to perform the corresponding nitrogen content collection work. The nitrogen content collection module of the present invention integrates two detection functions of water area and soil into one. In practical applications, only one set of equipment can be carried to meet the monitoring needs of two different media, which not only reduces the number and weight of equipment, but also reduces the use cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is a schematic diagram of the structure of the present invention;

[0038] Figure 2 For the present invention Figure 1 Top view of the structure;

[0039] Figure 3 For the present invention Figure 2 A magnified view of the structure A in .

[0040] In the figure: 1. Assembly column; 2. Insert; 3. Transmission control unit; 4. Elastic connecting piece; 5. Rotating rod; 6. Detection head; 7. Pull rope; 8. Connecting rod; 9. Contact rod; 10. Wedge block; 11. Telescopic device; 12. Hollow shell; 13. Sprinkler; 14. Liquid extraction mechanism; 15. Liquid storage tank; 16. Liquid outlet pipe; 17. Liquid collecting chamber; 18. Sealing seat; 19. Soil breaking block; 20. Through port; 21. Driving gear set. DETAILED DESCRIPTION

[0041] 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.

[0042] Example 1

[0043] Please refer to the attached Figure 1 -Attached Figure 2

[0044] An evaluation system for environmental nitrogen load in the middle and lower reaches of the Yangtze River urban agglomeration, including:

[0045] Several nitrogen content collection modules are used to collect nitrogen content data of water bodies and soils in the area to be evaluated. These nitrogen content collection modules are arranged in different locations in the area to be evaluated (i.e., the urban agglomeration in the middle and lower reaches of the Yangtze River), including water bodies (such as rivers, lakes, ponds, etc.) and soils (such as farmlands, wetlands, riparian zones, etc.), so as to ensure the comprehensiveness and representativeness of the data;

[0046] An evaluation and analysis module is electrically connected to the nitrogen content collection module, and is used to analyze the collected nitrogen content data and provide a nitrogen load evaluation result for the area to be evaluated; the evaluation and analysis module belongs to the prior art, for example, the evaluation and analysis module is a computer-type device, which can receive data from each nitrogen content collection module, and use mathematical models and algorithms to evaluate and analyze the nitrogen load of the area to be evaluated to obtain an evaluation and analysis result; a monitoring terminal is electrically connected to the evaluation and analysis module, and is used to receive the nitrogen load evaluation result.

[0047] The nitrogen content acquisition module includes:

[0048] An assembly column 1, an insert 2 is provided at the lower end thereof, and a transmission control unit 3 electrically connected to the evaluation and analysis module is provided on the assembly column 1;

[0049] A rotating rod 5 is movably arranged in the assembly column 1. Both sides of the outer wall of the rotating rod 5 are provided with detection heads 6. The detection head 6 on one side is electrically connected to a sensor 1 for detecting nitrogen data in the water area, and the detection head 6 on the other side is electrically connected to a sensor 2 for detecting nitrogen data in the soil. The sensor 1 is, for example, a water quality sensor, and the sensor 2 is, for example, a soil nitrogen content sensor. They are selected according to actual conditions and are not described in detail herein. The detection head 6 is selected according to the connected sensor. The nitrogen data is collected by cooperating with the detection head 6 and the sensor. A through hole 20 for the detection head 6 to pass through is opened on the outer wall of one side of the assembly column 1 so that the detection head 6 can enter the soil or water area to monitor the nitrogen content.

[0050] The connecting rod 8 has one end connected to the rotating rod 5 and the other end extending to the top of the assembly column 1 and connected to the hand wheel, so that the user can manually adjust it. Specifically, the user can turn the hand wheel to rotate the connecting rod 8 and the rotating rod 5, so that the corresponding detection head 6 corresponds to the through hole 20; and

[0051] The driving member is electrically connected to the transmission control unit 3 and is disposed in the assembly column 1 to drive the connecting rod 8 to allow the detection head 6 to pass through the through opening 20 so that the detection head 6 enters the soil or water to monitor the nitrogen content.

[0052] It should be noted that: this nitrogen content collection module can monitor the nitrogen content of soil and water areas respectively. When the nitrogen content collection module monitors the nitrogen content in soil, the insert 2 and the through-port 20 of the assembly column 1 must be immersed in the soil. When the nitrogen content collection module monitors the nitrogen content in water areas, the insert 2 is inserted into the soil of the water area, and the through-port 20 must be immersed in the water area.

[0053] Preferably, a transverse opening 20 is provided at the top of the assembly column 1 of the present embodiment, and a sliding block is slidably provided in the transverse opening 20. The sliding block is connected to an inner wall of one side of the transverse opening 20 by an elastic member, and the elastic member is, for example, a spring. The sliding block is movably sleeved on the outer wall of the connecting rod 8 so that the connecting rod 8 can rotate relative to the sliding block. The connecting rod 8 is detachably fixedly connected to the sliding block by a fixing member, and the fixing member is, for example, a nut or other structure, so that the connecting rod 8 does not rotate. Furthermore, a slide rail group can be provided at the lower end of the rotating rod 5, and the bottom end of the rotating rod 5 is rotatably connected to the slider in the slide rail group by a bearing, thereby ensuring the stability of the horizontal movement of the rotating rod 5 and the connecting rod 8.

[0054] Preferably, the driving member of this embodiment includes:

[0055] A contact rod 9, one end of which is movably sleeved on the outer wall of the connecting rod 8, and the other end of which is embedded with a ball;

[0056] The wedge block 10 is movably disposed in the assembly column 1, and the inclined surface of the wedge block 10 abuts against the ball; and,

[0057] The telescopic device 11 is arranged in the assembly column 1, and its output end is connected to the wedge block 10, and is used to drive the wedge block 10 to move vertically. The telescopic device 11 is, for example, an electric telescopic rod;

[0058] The wedge block 10 is driven by the telescopic device 11 , and the wedge block 10 drives the contact rod 9 through the inclined surface. The contact rod 9 drives the connecting rod 8 to drive the rotating rod 5 to move, thereby allowing the detection head 6 to pass through the through opening 20 .

[0059] Please refer to the attached Figure 3

[0060] Preferably, the present embodiment further includes a detection head cleaning unit, and the detection head cleaning unit includes:

[0061] The hollow shell 12 is arranged on the inner wall of one side of the assembly column 1. The hollow shell 12 is provided with a movable opening which is connected with the through opening 20 and is used for the detection head 6 to pass through. The detection head 6 first enters the hollow shell 12 and then passes through the through opening 20.

[0062] A plurality of nozzle groups are arranged in the hollow shell 12, and the nozzle group includes two nozzle groups 13, and the two nozzle groups 13 are symmetrically arranged above and below the axis of the movable port. When the detection head 6 is retracted into the assembly column 1, the detection head 6 can be cleaned, which on the one hand prolongs the service life of the detection head 6, and on the other hand ensures the accuracy of the detection data when the detection head 6 is used later; and,

[0063] The liquid supply mechanism is arranged on the assembly column 1 and is used to connect the nozzle group.

[0064] Preferably, the liquid supply mechanism of this embodiment includes:

[0065] A liquid storage tank 15 is provided on the assembly column 1 and is used to store cleaning liquid. The liquid storage tank 15 and the transmission control unit 3 can be provided on the top of the assembly column 1 by using a bracket;

[0066] The pumping mechanism 14 is arranged on the inner wall of the assembly column 1 and connected to the connecting rod 8. The input end of the pumping mechanism 14 is connected to the liquid storage tank 15 through a pipeline, and the output end of the pumping mechanism 14 is connected to the diverter through a pipeline. The diverter is, for example, a pipeline joint, which belongs to a conventional structure in the field and is not described in detail here. The diverter is connected to the nozzle group through a pipeline. The pumping mechanism 14 is used to extract the cleaning liquid in the liquid storage tank 15 when the connecting rod 8 drives the detection head 6 to move toward the through port 20, and to inject the cleaning liquid into the liquid outlet pipe 16 and the diverter when the connecting rod 8 drives the detection head 6 to reset, so that the cleaning liquid is sprayed out from the nozzle group; and,

[0067] The liquid collecting chamber 17 is opened in the assembly column 1 and is located below its inner cavity. The liquid collecting chamber 17 is connected to the hollow shell 12 through a pipeline. The side wall of the assembly column 1 is provided with a through hole for discharging the cleaning liquid in the liquid collecting chamber 17, and the through hole can be sealed by a detachable sealing member.

[0068] Preferably, the liquid extraction mechanism 14 of this embodiment includes:

[0069] A compression cylinder, one end of which is hollow and the other end of which is connected to the inner wall of the assembly column 1, has an input end and an output end, and a one-way valve is provided in both the input end and the output end to prevent the backflow of the cleaning liquid; and,

[0070] The piston member comprises a piston movably arranged in the compression cylinder and a piston rod with one end connected to the piston and the other end movably connected to the connecting rod 8.

[0071] Specifically, when the connecting rod 8 drives the detection head 6 to move toward the opening 20, it pulls the piston rod to make the piston move in the compression cylinder, thereby generating a negative pressure adsorption force in the compression cylinder to draw the cleaning liquid in the liquid storage tank 15 into the compression cylinder. When the connecting rod 8 drives the detection head 6 to reset, the cleaning liquid in the compression cylinder is pressed into the liquid outlet pipe 16, the diverter and the nozzle 13 under the reset action of the piston, that is, the nozzle 13 automatically cleans the detection head 6 when it is retracted to the assembly column 1, thereby ensuring the subsequent use of the detection head 6 while avoiding reducing the internal contamination of the assembly column 1.

[0072] Preferably, the diameter of the through opening 20 of the present embodiment is larger than the diameter of the detection head 6, and a sealing seat 18 is provided in the through opening 20. A soil-breaking block 19 is rotatably provided at the outer end of the sealing seat 18. The soil-breaking block 19 is conical, and one end of the soil-breaking block 19 extends into the sealing seat 18. The sealing seat 18 is connected to the hollow shell 12 through an elastic connecting member 4, and the elastic connecting member 4 is, for example, a T-shaped rod connected to the sealing seat 18 and passing through the hollow shell 12, and a spring sleeved on the outer wall of the T-shaped rod, one end of the spring is connected to the T-shaped rod, and the other end is connected to the inner wall of the hollow shell 12; an active spring is rotatably provided in the sealing seat 18. The gear set 21 includes a shaft and a driving gear sleeved on the shaft. The driving gear set 21 is transmission-connected with one end of the soil-breaking block 19 located in the sealing seat 18. The outer wall of one end of the soil-breaking block 19 located in the sealing seat 18 can be sleeved with a driven gear meshing with the driving gear. A pull rope 7 is wound around the shaft of the driving gear set 21. The other end of the pull rope 7 passes through the guide wheel set provided in the sealing seat 18 and then passes through the sealing seat 18 and is connected to the hollow shell 12, so as to drive the driving gear set 21 to drive the soil-breaking block 19 to rotate when the sealing seat 18 is pushed outward by the detection head 6.

[0073] Through this arrangement, especially in monitoring soil nitrogen content, when the detection head 6 moves outward, it can first break a channel for its entry through the rotating soil-breaking block 19. Subsequently, the detection head 6 enters the channel to monitor the soil, which can effectively reduce the damage to the detection head 6 caused by direct hard contact between particles in the soil and the detection head 6, thereby extending the use of the detection head 6.

[0074] Preferably, at least two groups of detection heads 6 are provided on both sides of the outer wall of the rotating column of this embodiment, and at least two groups of detection heads 6 are respectively provided at the upper and lower ends of the outer wall of the rotating column, so as to facilitate the collection of nitrogen content data at different heights of water area or soil.

[0075] Preferably, the transmission control unit 3 of this embodiment includes a control module electrically connected to sensor 1, sensor 2 and telescopic device 11, and a wireless communication module electrically connected to the control module, sensor 1, sensor 2, an evaluation and analysis module and a monitoring terminal. The control module is used to control the operation of sensor 1, sensor 2 and telescopic device 11, and the wireless communication module is used to remotely send the data detected by sensor 1 and sensor 2 to the evaluation and analysis module for processing. At the same time, the monitoring terminal can remotely send a control signal to the control module through the wireless communication module to control the operation of sensor 1, sensor 2 and telescopic device 11.

[0076] It should be noted that the nitrogen content collection module also has a power supply module, such as a battery, which can cooperate with an external photovoltaic panel structure to power the electrical components in the nitrogen content collection module, which will not be described in detail here.

[0077] A method for evaluating the environmental nitrogen load of the urban agglomeration in the middle and lower reaches of the Yangtze River, using the above-mentioned evaluation system, comprises the following steps:

[0078] S1: Divide soil monitoring sampling points and water monitoring sampling points at different locations in the area to be evaluated, and install nitrogen content collection modules at the soil monitoring sampling points and water monitoring sampling points respectively;

[0079] S2: The nitrogen content acquisition module sends the collected water area nitrogen content data or soil nitrogen content data to the evaluation and analysis module, which analyzes the collected nitrogen content data and gives the nitrogen load evaluation result of the area to be evaluated; wherein, when the nitrogen content acquisition module is installed at the soil monitoring sample point, the rotating column is rotated by the rotating rod 5 so that the detection head 6 electrically connected to the second sensor faces the through-port 20, and the assembly column 1 is inserted into the soil of the soil monitoring sample point through the insert 2; when the nitrogen content acquisition module is installed at the water area monitoring sample point, the rotating column is rotated by the rotating rod 5 so that the detection head 6 electrically connected to the first sensor faces the through-port 20, and the assembly column 1 is inserted into the underwater soil of the water area monitoring sample point through the insert 2. When in use, the detection head 6 is driven through the driving member to pass through the through-port 20 to collect nitrogen content data.

[0080] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An evaluation system for the environmental nitrogen load of the urban agglomeration in the middle and lower reaches of the Yangtze River, comprising: Several nitrogen content collection modules are used to collect nitrogen content data of water area and soil in the area to be evaluated; An evaluation and analysis module, electrically connected to the nitrogen content acquisition module, is used to analyze the collected nitrogen content data and provide a nitrogen load evaluation result for the area to be evaluated; and a monitoring terminal electrically connected to the evaluation and analysis module for receiving the nitrogen load evaluation result; characterized in that the nitrogen content acquisition module comprises: An assembly column (1) having an insert (2) at its lower end, and a transmission control unit (3) electrically connected to the evaluation and analysis module is provided on the assembly column (1); A rotating rod (5) is movably arranged in the assembly column (1), and detection heads (6) are arranged on both sides of the outer wall of the rotating rod (5). The detection head (6) on one side is electrically connected to a sensor 1 for detecting nitrogen data in the water area, and the detection head (6) on the other side is electrically connected to a sensor 2 for detecting nitrogen data in the soil. A through hole (20) for the detection head (6) to pass through is opened on the outer wall of one side of the assembly column (1); A connecting rod (8), one end of which is connected to the rotating rod (5), and the other end of which extends above the assembly column (1) and is connected to the hand wheel; and The driving member is electrically connected to the transmission control unit (3), is disposed in the assembly column (1), and is used to drive the connecting rod (8) so that the detection head (6) passes through the through opening (20).

2. The evaluation system according to claim 1, characterized in that: A transverse opening (20) is provided at the top of the assembly column (1), a sliding block is slidably provided in the transverse opening (20), the sliding block is connected to an inner wall of one side of the transverse opening (20) via an elastic member, the sliding block is movably sleeved on the outer wall of the connecting rod (8), and the connecting rod (8) is detachably fixedly connected to the sliding block via a fixing member.

3. The evaluation system according to claim 2, characterized in that: The driving member comprises: A contact rod (9) has one end movably sleeved on the outer wall of the connecting rod (8) and the other end embedded with a ball; A wedge block (10) is movably disposed in the assembly column (1), and the inclined surface of the wedge block (10) abuts against the ball bearing; and The telescopic device (11) is arranged in the assembly column (1), and its output end is connected to the wedge block (10) and is used to drive the wedge block (10) to move vertically.

4. The evaluation system according to claim 1, characterized in that: It also includes a detection head cleaning unit, the detection head cleaning unit includes: A hollow shell (12) is arranged on the inner wall of one side of the assembly column (1), and a movable opening is opened through the hollow shell (12) and is connected to the through opening (20) and is used for the detection head (6) to pass through; A plurality of nozzle groups are arranged in the hollow shell (12), wherein the nozzle groups include two nozzle groups (13), and the two nozzle groups (13) are symmetrically arranged above and below the axis of the movable port; and The liquid supply mechanism is arranged on the assembly column (1) and is used for connecting with the nozzle group.

5. The evaluation system according to claim 4, characterized in that: The liquid supply mechanism comprises: A liquid storage tank (15), arranged on the assembly column (1), for storing cleaning liquid; A liquid pumping mechanism (14) is arranged on the inner wall of the assembly column (1) and connected to the connecting rod (8); the input end of the liquid pumping mechanism (14) is connected to the liquid storage tank (15) through a pipeline; the output end of the liquid pumping mechanism (14) is connected to the diverter through a pipeline; the diverter is connected to the nozzle group through a pipeline; the liquid pumping mechanism (14) is used to pump out the cleaning liquid in the liquid storage tank (15) when the connecting rod (8) drives the detection head (6) to move toward the opening (20); and to inject the cleaning liquid into the liquid outlet pipe (16) and the diverter when the connecting rod (8) drives the detection head (6) to reset, so that the cleaning liquid is sprayed out from the nozzle group; and The liquid collecting chamber (17) is opened in the assembly column (1) and is located below the inner cavity thereof. The liquid collecting chamber (17) is connected to the hollow shell (12) through a pipeline.

6. The evaluation system according to claim 5, characterized in that: The liquid extraction mechanism (14) comprises: A compression cylinder, one end of which is hollow and the other end of which is connected to the inner wall of the assembly column (1), wherein the compression cylinder has an input end and an output end, and a one-way valve is provided in each of the input end and the output end; and The piston member comprises a piston movably arranged in the compression cylinder and a piston rod having one end connected to the piston and the other end movably connected to the connecting rod (8).

7. The evaluation system according to claim 4, characterized in that: The diameter of the through opening (20) is larger than the diameter of the detection head (6). A sealing seat (18) is provided in the through opening (20). A soil-breaking block (19) is rotatably provided at the outer end of the sealing seat (18). One end of the soil-breaking block (19) extends into the sealing seat (18). The sealing seat (18) is connected to the hollow shell (12) via an elastic connecting member (4). A driving gear set (21) is rotatably provided in the sealing seat (18). The driving gear set (21) is transmission-connected to one end of the soil-breaking block (19) located in the sealing seat (18). A pull rope (7) is wound around the shaft of the driving gear set (21). The other end of the pull rope (7) passes through the sealing seat (18) and is connected to the hollow shell (12). The pull rope is used to drive the driving gear set (21) to drive the soil-breaking block (19) to rotate when the sealing seat (18) is pushed outward by the detection head (6).

8. The evaluation system according to claim 1, characterized in that: At least two groups of detection heads (6) are provided on both sides of the outer wall of the rotating column, and the at least two groups of detection heads (6) are respectively provided at the upper and lower ends of the outer wall of the rotating column.

9. The evaluation system according to claim 3, characterized in that: The transmission control unit (3) comprises a control module electrically connected to sensor 1, sensor 2 and the telescopic device (11), and a wireless communication module electrically connected to the control module, sensor 1, sensor 2, the evaluation and analysis module and the monitoring terminal.

10. A method for evaluating the environmental nitrogen load of the urban agglomeration in the middle and lower reaches of the Yangtze River, using the evaluation system according to any one of claims 1 to 8, characterized in that: The following steps are involved: S1: Divide soil monitoring sampling points and water monitoring sampling points at different locations in the area to be evaluated, and install nitrogen content collection modules at the soil monitoring sampling points and water monitoring sampling points respectively; S2: The nitrogen content collection module sends the collected water area nitrogen content data or soil nitrogen content data to the evaluation and analysis module, and the evaluation and analysis module analyzes the collected nitrogen content data and provides a nitrogen load evaluation result for the area to be evaluated; wherein, when the nitrogen content collection module is installed at the soil monitoring sample point, the rotating column is rotated by the rotating rod (5) so that the detection head (6) electrically connected to the second sensor faces the through opening (20), and the assembly column (1) is inserted into the soil of the soil monitoring sample point through the insert (2); when the nitrogen content collection module is installed at the water area monitoring sample point, the rotating column is rotated by the rotating rod (5) so that the detection head (6) electrically connected to the first sensor faces the through opening (20), and the assembly column (1) is inserted into the underwater soil of the water area monitoring sample point through the insert (2); when in use, the detection head (6) is driven through the through opening (20) by the driving member to collect nitrogen content data.

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