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

Abstract

The present invention discloses an evaluation system and method for environmental nitrogen load in the urban agglomeration in the middle and lower reaches of the Yangtze River, including: a plurality of nitrogen content acquisition modules; an evaluation and analysis module electrically connected to the nitrogen content acquisition modules; and a monitoring terminal electrically connected to the evaluation and analysis module; the nitrogen content acquisition module includes: an assembly column; a rotating rod movably disposed in the assembly column, detection heads are provided on both sides of the outer wall of the rotating rod, one of the detection heads is electrically connected to a first sensor, and the other detection head is electrically connected to a second sensor, a through port for the detection head to pass through is formed on one outer wall of the assembly column; a connecting rod, one end of which is connected to the rotating rod and the other end extends above the assembly column; and a driving member disposed in the assembly column. The nitrogen content acquisition module of the present invention integrates the detection functions of water area and soil into one, and only one set of equipment can meet the monitoring requirements of two different media, which not only reduces the number and weight of the equipment, but also reduces the use cost.

Description

Technical Field

[0001] The present invention relates to the technical field of environmental assessment, and particularly to an evaluation system and method for environmental nitrogen load in the urban agglomerations in the middle and lower reaches of the Yangtze River. Background Technique

[0002] At present, in the field of monitoring and evaluation of environmental nitrogen load, a variety of technical means have been widely used. Among them, for example, nitrogen content collection devices are installed in areas such as waters and soils in the urban agglomerations in the middle and lower reaches of the Yangtze River to collect nitrogen content data in real time. By analyzing the nitrogen content data, nitrogen load evaluation can be carried out. Although this method can carry out nitrogen load evaluation work, due to the significant differences in physical and chemical properties between waters and soils, different types of nitrogen content collection devices need to be used. For monitoring personnel, this not only means that more devices need to be carried in the preparation stage, increasing the inconvenience of carrying and the complexity of operation, but also increases the use cost. Therefore, we propose an evaluation system and method for environmental nitrogen load in the urban agglomerations in the middle and lower reaches of the Yangtze River. Summary of the Invention

[0003] The purpose of the present invention is to provide an evaluation system and method for environmental nitrogen load in the urban agglomerations in the middle and lower reaches of the Yangtze River to solve the problems raised in the above background technique.

[0004] To achieve the above purpose, the present invention provides the following technical solutions:

[0005] An evaluation system for environmental nitrogen load in the urban agglomerations in the middle and lower reaches of the Yangtze River, comprising:

[0006] A plurality of nitrogen content collection modules for respectively collecting nitrogen content data of waters and soils in the area to be evaluated;

[0007] An evaluation and analysis module electrically connected to the nitrogen content collection module for analyzing the collected nitrogen content data and giving 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 collection module includes:

[0008] An assembly column, with an insert at its lower end, and a transmission control unit electrically connected to the evaluation and analysis module is provided on the assembly column;

[0009] A rotating rod movably arranged in the assembly column, with detection heads provided on both outer walls of the rotating rod. One side of the detection head is electrically connected to a sensor one for detecting nitrogen data in waters, and the other side of the detection head is electrically connected to a sensor two for detecting nitrogen data in soils. A through port for the detection head to pass through is provided on one outer wall of the assembly column;

[0010] A connecting rod, one end connected to the rotating rod, and the other end extending above the assembly column and connected to a hand wheel; and,

[0011] A driving member, electrically connected to the transmission control unit, is disposed inside the assembly column and is used to drive the connecting rod to make the detection head pass through the through port.

[0012] Further improvement lies in that a transverse through port is formed at the top of the assembly column, a sliding block is slidably disposed in the transverse through port, the sliding block is connected to one inner wall of the transverse through port through an elastic member, the sliding block is movably sleeved on the outer wall of the connecting rod, and the connecting rod is detachably and fixedly connected to the sliding block through a fixing member.

[0013] Further improvement lies in that the driving member includes:

[0014] 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;

[0015] A wedge block, movably disposed inside the assembly column, and the inclined surface of the wedge block abuts against the ball; and,

[0016] A telescopic device, disposed inside the assembly column, and its output end is connected to the wedge block and is used to drive the wedge block to move vertically.

[0017] Further improvement lies in that it further includes a detection head cleaning part, and the detection head cleaning part includes:

[0018] A hollow shell, disposed on one inner wall of the assembly column, and a movable port communicating with the through port and for the detection head to pass through is formed through the hollow shell;

[0019] A plurality of groups of nozzle groups, disposed inside the hollow shell, each nozzle group includes two nozzles, and the two nozzles are symmetrically disposed above and below the axis of the movable port; and,

[0020] A liquid supply mechanism, disposed on the assembly column and used to communicate with the nozzle groups.

[0021] Further improvement lies in that the liquid supply mechanism includes:

[0022] A liquid storage tank, disposed on the assembly column and used to store cleaning liquid;

[0023] A liquid pumping mechanism, disposed on the inner wall of the assembly column and connected to the connecting rod, the input end of the liquid pumping mechanism is communicated with the liquid storage tank through a pipeline, the output end of the liquid pumping mechanism is communicated with a shunt member through a pipeline, the shunt member is communicated with the nozzle groups through a pipeline, the liquid pumping mechanism is used to pump out the cleaning liquid in the liquid storage tank when the connecting rod drives the detection head to move towards the through port, and to inject the cleaning liquid into the liquid outlet pipe and the shunt member when the connecting rod drives the detection head to move back, so that the cleaning liquid is sprayed out from the nozzle groups; and,

[0024] A liquid collecting cavity, formed inside the assembly column and located below its inner cavity, and the liquid collecting cavity is communicated with the hollow shell through a pipeline.

[0025] A further improvement lies in that the liquid extraction mechanism includes:

[0026] A compression cylinder, one end of which is hollow and the other end is connected to the inner wall of the assembly column. The compression cylinder has an input end and an output end, and one-way valves are provided in both the input end and the output end; and,

[0027] A piston member, including a piston movably disposed 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.

[0028] A further improvement lies in that the diameter of the through port is larger than the diameter of the detection head. A sealing seat is provided in the through port. 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 member. A driving gear set is rotatably provided in the sealing seat. The driving gear set is in transmission connection with one end of the soil-breaking block located in the sealing seat. A pull rope is wound around the shaft portion of the driving gear set. The other end of the pull rope passes around a guide wheel set provided in the sealing seat and then penetrates through the sealing seat and is connected to the hollow shell, and is used to drive the driving gear set to drive the soil-breaking block to rotate when the sealing seat is pushed outward by the detection head.

[0029] A further improvement lies in that at least two groups of detection heads are provided on both sides of the outer wall of the rotating column, and at least two groups of the detection heads are respectively provided at the upper and lower ends of the outer wall of the rotating column.

[0030] A further improvement lies in that the transmission control unit includes a control module electrically connected to the first sensor, the second sensor, and the telescopic device, and a wireless communication module electrically connected to the control module, the first sensor, the second sensor, the evaluation and analysis module, and the monitoring terminal.

[0031] An evaluation method for the environmental nitrogen load of the urban agglomeration in the middle and lower reaches of the Yangtze River, using the above evaluation system, includes the following steps:

[0032] S1: Divide soil monitoring points and water area monitoring points at different positions in the area to be evaluated, and install nitrogen content acquisition modules at the soil monitoring points and the water area monitoring points respectively;

[0033] S2: The nitrogen content acquisition module sends the acquired water area nitrogen content data or soil nitrogen content data to the evaluation and analysis module. The evaluation and analysis module analyzes the acquired nitrogen content data and gives the nitrogen load evaluation result of the area to be evaluated. Among them, when the nitrogen content acquisition module is installed at the soil monitoring sampling 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 sampling point through the insert; when the nitrogen content acquisition module is installed at the water area monitoring sampling 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 bottom soil of the water area monitoring sampling point through the insert. During use, the driving part is used to drive the detection head to pass through the through port to collect nitrogen content data.

[0034] Compared with the prior art, the beneficial effects of the present invention are:

[0035] The present invention conducts nitrogen load evaluation on the area to be evaluated through the nitrogen content acquisition module, the evaluation and analysis module and the monitoring terminal. The rotating rod in the nitrogen content acquisition module is respectively connected with a detection head for detecting water area nitrogen data sensor one and a detection head for detecting soil nitrogen data sensor one. The user only needs to adjust the corresponding detection head 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 out of the through port through the driving part to carry out the corresponding nitrogen content collection work. The nitrogen content acquisition module of the present invention integrates the 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 the equipment, but also reduces the use cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 is a schematic structural diagram of the present invention;

[0037] Figure 2 is of the present invention Figure 1 structural top view;

[0038] Figure 3 is of the present invention Figure 2 enlarged view of structure A in;

[0039] 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 head; 14. Liquid pumping mechanism; 15. Liquid storage tank; 16. Liquid outlet pipe; 17. Liquid collection cavity; 18. Sealing seat; 19. Earth-breaking block; 20. Through port; 21. Active gear set. DETAILED DESCRIPTION OF THE INVENTION

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

[0041] Embodiment 1

[0042] Please refer to the attached Figure 1 - attached Figure 2

[0043] An evaluation system for environmental nitrogen load in the urban agglomeration in the middle and lower reaches of the Yangtze River, comprising:

[0044] A number of nitrogen content acquisition modules for respectively acquiring nitrogen content data of the water area and soil in the area to be evaluated. These nitrogen content acquisition modules are arranged at different positions in the area to be evaluated (i.e., the urban agglomeration in the middle and lower reaches of the Yangtze River), including water areas (such as rivers, lakes, ponds, etc.) and soil (such as farmland, wetlands, riparian zones, etc.), so as to ensure the comprehensiveness and representativeness of the data;

[0045] An evaluation and analysis module, electrically connected to the nitrogen content acquisition module, for analyzing the acquired nitrogen content data and giving the nitrogen load evaluation result of 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 device, which can receive data from each nitrogen content acquisition module and use mathematical models and algorithms, etc. to evaluate and analyze the nitrogen load of the area to be evaluated to obtain the evaluation and analysis result; a monitoring terminal, electrically connected to the evaluation and analysis module, for receiving the nitrogen load evaluation result.

[0046] The nitrogen content acquisition module includes:

[0047] An assembly column 1, with an insert 2 provided at its lower end, and a transmission control unit 3 electrically connected to the evaluation and analysis module provided on the assembly column 1;

[0048] A rotating rod 5 is movably arranged inside the assembly column 1. Detection heads 6 are provided on both sides of the outer wall of the rotating rod 5. One side of the detection head 6 is electrically connected to a sensor one for detecting water area nitrogen data, and the other side of the detection head 6 is electrically connected to a sensor two for detecting soil nitrogen data. The sensor one is, for example, a water quality sensor, and the sensor two is, for example, a soil nitrogen content sensor, which can be selected according to the actual situation and will not be elaborated here. The detection head 6 can be selected to be suitable according to the connected sensor. Nitrogen data acquisition is carried out through the cooperation of the detection head 6 and the sensor. A through hole 20 for the detection head 6 to pass through is provided on one side outer wall of the assembly column 1 so that the detection head 6 can enter the soil or water area for nitrogen content monitoring;

[0049] The connecting rod 8 is connected to the rotating rod 5 at one end and extends above the assembly column 1 at the other end and is connected to the handwheel, which facilitates manual adjustment by the user. Specifically, the user can rotate the handwheel, causing the connecting rod 8 and the rotating rod 5 to rotate, thereby making the corresponding detection head 6 correspond to the through port 20; and,

[0050] The driving member is electrically connected to the transmission control unit 3 and is provided inside the assembly column 1 for driving the connecting rod 8 to cause the detection head 6 to pass through the through port 20 so that the detection head 6 can enter the soil or water area for nitrogen content monitoring.

[0051] It should be noted that: this nitrogen content acquisition module can monitor the nitrogen content of soil and water respectively. When the nitrogen content acquisition module monitors the nitrogen content of soil, it is necessary to submerge the insert 2 and the position of the through port 20 of the assembly column 1 into the soil. When the nitrogen content acquisition module monitors the nitrogen content of water, the insert 2 is inserted into the water area soil and it is ensured that the position of the through port 20 is submerged in the water area.

[0052] Preferably, a horizontal through port 20 is provided at the top of the assembly column 1 of this embodiment. A sliding block is slidably provided in the horizontal through port 20. The sliding block is connected to one inner wall of the horizontal through port 20 through an elastic member. This 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 and fixedly connected to the sliding block through a fixing member. This fixing member is, for example, a nut and other structures, so that the connecting rod 8 will not rotate. Further, a slide rail group can be provided at the lower end of the rotating rod 5. The bottom end of the rotating rod 5 is rotatably connected to the slider in the slide rail group through a bearing to ensure the stability of the horizontal movement of the rotating rod 5 and the connecting rod 8.

[0053] Preferably, the driving member of this embodiment includes:

[0054] The contact rod 9 has one end movably sleeved on the outer wall of the connecting rod 8 and a ball is embedded at the other end;

[0055] The wedge-shaped block 10 is movably provided inside the assembly column 1, and the inclined surface of the wedge-shaped block 10 abuts against the ball; and,

[0056] The telescopic device 11 is provided inside the assembly column 1, and its output end is connected to the wedge-shaped block 10 for driving the wedge-shaped block 10 to move vertically. The telescopic device 11 is, for example, an electric telescopic rod;

[0057] By driving the wedge-shaped block 10 through the telescopic device 11, the wedge-shaped block 10 drives the contact rod 9 through the inclined surface, and the contact rod 9 drives the connecting rod 8 to drive the rotating rod 5 to move, thereby causing the detection head 6 to pass through the through port 20.

[0058] Please refer to the appendix Figure 3

[0059] Preferably, the present embodiment further includes a detection head cleaning unit, which includes:

[0060] A hollow shell 12 is provided on the inner wall of one side of the assembly column 1. A through hole communicating with the through port 20 and allowing the detection head 6 to pass through is formed in the hollow shell 12. The detection head 6 first enters the hollow shell 12 and then passes through the through port 20.

[0061] A plurality of groups of nozzle groups are provided in the hollow shell 12. Each nozzle group includes two nozzles 13, and the two nozzles 13 are symmetrically arranged above and below the axis of the moving port. When the detection head 6 is retracted into the assembly column 1, the detection head 6 can be cleaned, which can extend the service life of the detection head 6 on the one hand and ensure the accuracy of the detection data during the subsequent use of the detection head 6 on the other hand. And,

[0062] A liquid supply mechanism is provided on the assembly column 1 for communicating with the nozzle group.

[0063] Preferably, the liquid supply mechanism of the present embodiment includes:

[0064] A liquid storage tank 15 is provided on the assembly column 1 for storing cleaning liquid. Both the liquid storage tank 15 and the transmission control unit 3 can be provided on the top of the assembly column 1 by means of brackets.

[0065] A liquid pumping mechanism 14 is provided on the inner wall of the assembly column 1 and is connected to the connecting rod 8. The input end of the liquid pumping mechanism 14 is communicated with the liquid storage tank 15 through a pipeline, and the output end of the liquid pumping mechanism 14 is communicated with a shunt member through a pipeline. The shunt member is, for example, a pipeline joint, which is a conventional structure in the art and will not be described in detail here. The shunt member is communicated with 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 towards the through port 20, and inject the cleaning liquid into the liquid outlet pipe 16 and the shunt member when the connecting rod 8 drives the detection head 6 to move back to its original position, so that the cleaning liquid is ejected from the nozzle group. And,

[0066] A liquid collecting cavity 17 is formed in the assembly column 1 and is located below the inner cavity thereof. The liquid collecting cavity 17 is communicated with the hollow shell 12 through a pipeline. A through port for discharging the cleaning liquid in the liquid collecting cavity 17 is provided on the side wall of the assembly column 1, and the through port can be sealed by a detachable seal.

[0067] Preferably, the liquid pumping mechanism 14 of the present embodiment includes:

[0068] A compression cylinder has a hollow end and the other end is connected to the inner wall of the assembly column 1. The compression cylinder has an input end and an output end, and one-way valves are provided in both the input end and the output end to prevent the cleaning liquid from flowing back. And,

[0069] A piston member includes 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.

[0070] Specifically, when the connecting rod 8 drives the detection head 6 to move towards the through port 20, it pulls the piston rod, causing the piston to move within the compression cylinder. As a result, a negative pressure adsorption force is generated within 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 move back to its original position, the cleaning liquid in the compression cylinder is pressed into the liquid outlet pipe 16, the flow dividing member, and the nozzle 13 under the reset action of the piston. That is, the nozzle 13 automatically cleans the detection head 6 when the detection head 6 is retracted into the assembly column 1, ensuring the subsequent use of the detection head 6 while also preventing the internal contamination of the assembly column 1 from being reduced.

[0071] Preferably, the diameter of the through port 20 in this embodiment is larger than the diameter of the detection head 6. A sealing seat 18 is provided within the through port 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. The elastic connecting member 4 is, for example, a T-shaped rod connecting 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. A driving gear set 21 is rotatably provided within the sealing seat 18. The driving gear set 21 includes a shaft portion and a driving gear sleeved on the shaft portion. The driving gear set 21 is in transmission connection with the end of the soil-breaking block 19 located within the sealing seat 18. A driven gear meshing with the driving gear can be sleeved on the outer wall of the end of the soil-breaking block 19 located within the sealing seat 18. A pull rope 7 is wound around the shaft portion of the driving gear set 21. The other end of the pull rope 7 passes through the sealing seat 18 after bypassing a guiding wheel set provided within the sealing seat 18 and is connected to the hollow shell 12, and 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.

[0072] With this setting, especially in the monitoring of soil nitrogen content, when the detection head 6 moves outward, it can first break open a passage for its entry through the rotating soil-breaking block 19. Subsequently, the detection head 6 enters the passage to monitor the soil, which can effectively reduce the damage caused to the detection head 6 by the direct hard contact between the particulate matter in the soil and the detection head 6, and extend the service life of the detection head 6.

[0073] Preferably, at least two groups of detection heads 6 are provided on both sides of the outer wall of the rotating column in this embodiment. 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, which is convenient for collecting nitrogen content data at different height positions in the water area or soil.

[0074] Preferably, the transmission control unit 3 of this embodiment includes a control module electrically connected to the first sensor, the second sensor, and the telescopic device 11, and a wireless communication module electrically connected to the control module, the first sensor, the second sensor, the evaluation and analysis module, and the monitoring terminal. The control module is used to control the operation of the first sensor, the second sensor, and the telescopic device 11. The wireless communication module is used to remotely send the data detected by the first sensor and the second sensor 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 the first sensor, the second sensor, and the telescopic device 11.

[0075] It should be noted that the nitrogen content acquisition module also has a power supply module, such as a storage battery, which can cooperate with the external photovoltaic panel structure to supply power to the electrical components in the nitrogen content acquisition module. Details are not described separately here.

[0076] An evaluation method for the environmental nitrogen load of the urban agglomeration in the middle and lower reaches of the Yangtze River, using the above evaluation system, includes the following steps:

[0077] S1: Divide soil monitoring points and water area monitoring points at different positions in the area to be evaluated, and install nitrogen content acquisition modules at the soil monitoring points and water area monitoring points respectively;

[0078] 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. The evaluation and analysis module analyzes the collected nitrogen content data and gives the nitrogen load evaluation result of the area to be evaluated. Among them, when the nitrogen content acquisition module is installed at the soil monitoring 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 point through the insert 2. When the nitrogen content acquisition module is installed at the water area monitoring 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 bottom soil of the water area monitoring point through the insert 2. During use, the detection head 6 is driven to penetrate the through port 20 to collect nitrogen content data.

[0079] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirits of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An evaluation system for environmental nitrogen load in the urban agglomeration in the middle and lower reaches of the Yangtze River, comprising: A number of nitrogen content acquisition modules for respectively acquiring nitrogen content data of the water area and soil in the area to be evaluated; An evaluation and analysis module, electrically connected to the nitrogen content acquisition module, for analyzing the acquired nitrogen content data and giving the 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; characterized in that the nitrogen content acquisition module includes: An assembly column (1), with an insert (2) provided at its lower end, and a transmission control unit (3) electrically connected to the evaluation and analysis module provided on the assembly column (1); A rotating rod (5), movably arranged inside the assembly column (1), with detection heads (6) provided on both sides of the outer wall of the rotating rod (5). One side of the detection head (6) is electrically connected to a first sensor for detecting water area nitrogen data, and the other side of the detection head (6) is electrically connected to a second sensor for detecting soil nitrogen data. A through port (20) for the detection head (6) to pass through is opened on one outer wall of the assembly column (1); A connecting rod (8), with one end connected to the rotating rod (5) and the other end extending above the assembly column (1) and connected to a handwheel; and, A driving member, electrically connected to the transmission control unit (3), arranged inside the assembly column (1), for driving the connecting rod (8) to make the detection head (6) pass through the through port (20); It further includes a detection head cleaning part, and the detection head cleaning part includes: A hollow shell (12), arranged on one inner wall of the assembly column (1), and a movable port communicating with the through port (20) and for the detection head (6) to pass through is penetrated on the hollow shell (12); A number of spray head groups, arranged inside the hollow shell (12), each spray head group includes two spray heads (13), and the two spray heads (13) are symmetrically arranged above and below the axis of the movable port; and, A liquid supply mechanism, arranged on the assembly column (1), for communicating with the spray head group; The diameter of the through port (20) is larger than the diameter of the detection head (6). A sealing seat (18) is arranged inside the through port (20). A soil-breaking block (19) is rotatably arranged 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) through an elastic connecting member (4). A driving gear set (21) is rotatably arranged inside the sealing seat (18). The driving gear set (21) is in transmission connection with one end of the soil-breaking block (19) located inside the sealing seat (18). A pull rope (7) is wound around the shaft part of the driving gear set (21). The other end of the pull rope (7) bypasses a guide wheel set arranged inside the sealing seat (18), then penetrates through the sealing seat (18) and is connected to the hollow shell (12), and is used for driving 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).

2. The evaluation system according to claim 1, wherein: A transverse through - opening (20) is formed at the top of the assembly column (1). A sliding block is slidably arranged in the transverse through - opening (20). The sliding block is connected to one inner wall of the transverse through - opening (20) by 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 and fixedly connected to the sliding block through a fixing member.

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

4. The evaluation system according to claim 1, wherein: The liquid supply mechanism includes: A liquid storage tank (15) arranged on the assembly column (1) for storing cleaning liquid; A liquid pumping mechanism (14) 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 a flow - dividing member through a pipeline, the flow - dividing member is connected to a spray head group through a pipeline. The liquid pumping mechanism (14) is used for pumping out the cleaning liquid in the liquid storage tank (15) when the connecting rod (8) drives the detection head (6) to move towards the through - opening (20), and injecting the cleaning liquid into the liquid outlet pipe (16) and the flow - dividing member when the connecting rod (8) drives the detection head (6) to move back to its original position, so that the cleaning liquid sprays out from the spray head group; and, A liquid collection cavity (17) is formed in the assembly column (1) and is located below the inner cavity thereof. The liquid collection cavity (17) is connected to the hollow shell (12) through a pipeline.

5. The evaluation system according to claim 4, wherein: The liquid pumping mechanism (14) includes: A compression cylinder with one end being hollow and the other end connected to the inner wall of the assembly column (1). The compression cylinder has an input end and an output end, and one - way valves are arranged in both the input end and the output end; and, A piston member including 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).

6. The evaluation system according to claim 1, wherein: At least two groups of detection heads (6) are arranged on both sides of the outer wall of the rotating rod (5), and at least two groups of the detection heads (6) are respectively arranged at the upper and lower ends of the outer wall of the rotating rod (5).

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

8. 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 described in any one of claims 1-7, characterized in that: It includes the following steps: S1: Divide soil monitoring sampling points and water area monitoring sampling points at different positions in the area to be evaluated, and install nitrogen - content collection modules at the soil monitoring sampling points and the water area monitoring sampling points respectively; 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. The evaluation and analysis module analyzes the collected nitrogen content data and gives the nitrogen load evaluation result of the area to be evaluated. Among them, when the nitrogen content acquisition module is installed at the soil monitoring sampling point, by turning the handwheel, the connecting rod (8) and the rotating rod (5) rotate, so that the detection head (6) electrically connected to the sensor faces the through port (20), and the assembly column (1) is inserted into the soil of the soil monitoring sampling point through the insert (2). When the nitrogen content acquisition module is installed at the water area monitoring sampling point, by turning the handwheel, the connecting rod (8) and the rotating rod (5) rotate, so that the detection head (6) electrically connected to the sensor faces the through port (20), and the assembly column (1) is inserted into the bottom soil of the water area monitoring sampling point. When in use, the detection head (6) is driven by the driving part to penetrate through the through port (20) to collect the nitrogen content data.

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