Football field lawn root ventilation and negative pressure drainage system

Abstract

The utility model relates to a football field lawn root ventilation and negative pressure drainage system which comprises a ventilation drainage pipe network which comprises a pipe network main pipeline and a plurality of pipe network branch pipelines, and the two ends of the pipe network main pipeline are communicated with the pipe network branch pipelines and an air-water separation well respectively; the air supply and exhaust module comprises a ventilation air conditioning unit, a ventilation shutter, an air supply and exhaust main pipeline, a first bypass and a second bypass, the two ends of the air supply and exhaust main pipeline communicate with the air-water separation well and the ventilation shutter correspondingly, a first air valve and a second air valve are arranged on the air supply and exhaust main pipeline, and one end of the first bypass is connected between the first air valve and the ventilation air conditioning unit; a third air valve is arranged on the first bypass, one end of the second bypass is connected between the gas-water separation well and the first air valve, the other end of the second bypass is connected between the ventilation air conditioning unit and the second air valve, and a fourth air valve is arranged on the second bypass. The working condition requirements of air supply, air exhaust and negative pressure drainage can be met by controlling opening and closing of all the air valves.

Description

Technical Field

[0001] The utility model relates to the technical field of ventilation and drainage, in particular to a football field lawn root ventilation and negative pressure drainage system. Background Art

[0002] With the development of society and the improvement of people's living standards, coupled with the increasingly mature development of my country's sports industry, football has flourished and has been loved by a large number of sports enthusiasts, and the demand for various lawn sports venues has increased dramatically. The quality of the football field lawn has a great impact on the football process, especially the construction of professional football fields for large-scale football matches, the lawn quality requirements are quite high, such as not only the flatness and uniformity of the turf in the lawn, but also the control of the elasticity, rolling friction performance, sliding friction performance, etc. of the lawn. The grass on the football field can be divided into warm-season lawn grass and cool-season lawn grass. The most suitable growth temperature for warm-season lawn grass is 26℃~35℃, and it will be dormant when the temperature is below 10℃. The most suitable growth temperature for cool-season lawn grass is between 15℃ and 25℃. When the temperature is higher than 30℃, it grows slowly. If it is not well managed in the hot summer, it may even cause the lawn to wither and decay. In my country, high-standard football fields in northern China mostly use cool-season grasses, but cool-season grasses mainly face the problem of overcoming the summer. The continuous high temperature and high humidity in summer make cool-season grasses prone to summer spot and pythium, and once the disease occurs, it will quickly infect the entire field and cause turf necrosis. Warm-season turf grasses are mostly used in southern regions, which are more suitable for grass growth and obtaining high-quality turf, but the main problem is that the green period is relatively short and it will go dormant in winter.

[0003] At the same time, the artificial lawn of the football field is different from other crops. The turf roots are connected and the clay is strong, which can easily cause soil compaction and poor soil permeability. The roots of artificially planted lawns are dense and intertwined, which can easily accumulate water in low-lying areas, causing root rot. If the lawn is trampled too much, the soil will become more compact, affecting the breathing and drainage of the lawn roots, causing further deterioration of the lawn. If the roots of the lawn are in an unventilated and airtight state for a long time, it will not only affect the growth of the lawn, but in severe cases it will induce root rot, causing the turf to die in large areas, seriously affecting the quality of the lawn. Utility Model Content

[0004] The purpose of the utility model is to provide a football field lawn root ventilation and negative pressure drainage system, which can meet the working conditions of air supply, exhaust and negative pressure drainage, provide a suitable temperature environment for the lawn roots, and at the same time enhance the ventilation and air exchange at the lawn roots, and accelerate lawn drainage during heavy rain and rainstorms, providing a complete set of technical guarantee measures for high-quality lawns.

[0005] In order to achieve the above-mentioned purpose, the utility model provides a football field lawn root ventilation and negative pressure drainage system, including a ventilation and drainage pipe network, an air-water separation well and an air supply and exhaust module, wherein:

[0006] The ventilation and drainage pipe network includes a pipe network main pipe and a plurality of pipe network branch pipes, the pipe network branch pipes are uniformly distributed in the soil at the roots of the lawn and are interconnected with one end of the pipe network main pipe, the other end of the pipe network main pipe is connected to the air-water separation well, and the pipe network branch pipes are provided with a plurality of through holes;

[0007] The air supply and exhaust module comprises a ventilation and air-conditioning unit, a ventilation louver, an air supply and exhaust main line, a first bypass and a second bypass, one end of the air supply and exhaust main line is connected to the gas-water separation well, and the other end of the air supply and exhaust main line is connected to the ventilation louver, the ventilation and air-conditioning unit is arranged on the air supply and exhaust main line, and a first air valve and a second air valve are arranged on the air supply and exhaust main line, the first air valve is located between the ventilation and air-conditioning unit and the gas-water separation well, the second air valve is located between the ventilation and air-conditioning unit and the ventilation louver, one end of the first bypass is connected to the air supply and exhaust main line between the first air valve and the ventilation and air-conditioning unit, the other end of the first bypass is connected to the air supply and exhaust main line between the second air valve and the ventilation louver, and a third air valve is arranged on the first bypass, one end of the second bypass is connected to the air supply and exhaust main line between the gas-water separation well and the first air valve, the other end of the second bypass is connected to the air supply and exhaust main line between the ventilation and air-conditioning unit and the second air valve, and a fourth air valve is arranged on the second bypass.

[0008] Optionally, the football field lawn root ventilation and negative pressure drainage system also includes a control module, and the ventilation and air-conditioning unit, the first air valve, the second air valve, the third air valve and the fourth air valve are respectively communicated with the control module.

[0009] Optionally, the first air valve, the second air valve, the third air valve and the fourth air valve are all electric air valves.

[0010] Optionally, the ventilation and air-conditioning unit includes a cooling and heating unit and a fan respectively connected to the control module, the fan is used to supply air to the ventilation and drainage network and to extract exhaust air from the ventilation and drainage network, and the cooling and heating unit is used to adjust the supply air temperature.

[0011] Optionally, the ventilation and air-conditioning unit also includes a temperature and humidity sensor and a humidifier respectively connected to the control module, the temperature and humidity sensor is used to monitor the temperature and humidity of the supply air, and the control module is used to control the operation of the cooling and heating unit and the humidifier according to the temperature and humidity monitored by the temperature and humidity sensor.

[0012] Optionally, the football field lawn root ventilation and negative pressure drainage system also includes a temperature sensor arranged in the soil at the root of the lawn, and the temperature sensor is communicatively connected to the control module, and the control module is used to adjust the operation of the cooling and heating unit according to the soil temperature monitored by the temperature sensor.

[0013] Optionally, a wind pressure sensor communicatively connected to the control module is provided on the main pipe line of the pipe network, and the control module is used to adjust the operating frequency of the fan according to the static pressure value monitored by the wind pressure sensor.

[0014] Optionally, a submersible pump and a liquid level sensor which are respectively communicatively connected to the control module are further provided in the gas-water separation well, and the control module is used to control the operation of the submersible pump according to the liquid level value monitored by the liquid level sensor.

[0015] Optionally, the branch pipeline of the pipeline network is provided with a drainage slope and slopes toward the main pipeline of the pipeline network, and the main pipeline of the pipeline network is provided with a drainage slope and slopes toward the gas-water separation well.

[0016] In the football field lawn root ventilation and negative pressure drainage system provided by the utility model, by controlling the opening and closing of each air valve, the working conditions of air supply, exhaust and negative pressure drainage can be met, and a suitable temperature environment for the lawn roots can be provided. At the same time, the ventilation and air exchange at the lawn roots can be enhanced, and the lawn drainage can be accelerated during heavy rain and rainstorms, providing a complete set of technical guarantee measures for high-quality lawns. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Those skilled in the art should understand that the drawings provided are for a better understanding of the present invention and do not constitute any limitation on the scope of the present invention.

[0018] Figure 1 A schematic diagram of a football field lawn root ventilation and negative pressure drainage system provided by an embodiment of the utility model;

[0019] Figure 2 A schematic diagram of a ventilation and air conditioning unit provided in one embodiment of the utility model.

[0020] in:

[0021] 101-pipeline main line; 102-pipeline branch line; 201-gas-water separation well; 202-submersible pump; 301-ventilation and air conditioning unit; 302-ventilation shutters; 303-air supply and exhaust main line; 304-first bypass; 305-second bypass; 401-first air valve; 402-second air valve; 403-third air valve; 404-fourth air valve;

[0022] 3011-cooling and heating unit; 3012-fan; 3013-temperature and humidity sensor; 3014-humidifier; 3015-filter; 3016-electric bypass air valve. DETAILED DESCRIPTION

[0023] In order to make the purpose, advantages and features of the present utility model clearer, the present utility model is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the accompanying drawings are in a very simplified form and use non-precise proportions, which are only used to conveniently and clearly assist in explaining the purpose of the implementation method of the present utility model. In order to make the purpose, features and advantages of the present utility model more obvious and easy to understand, please refer to the accompanying drawings. It should be noted that the structure, proportion, size, etc. illustrated in the drawings of this specification are only used to match the content disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present utility model. Any modification of the structure, change in the proportional relationship or adjustment of the size, in the case of the same or similar effects and purposes that can be achieved by the present utility model, should still fall within the scope of the technical content disclosed by the present utility model.

[0024] As used in the present invention, the singular forms "one", "an", and "the" include plural objects, unless the content clearly indicates otherwise. As used in the present invention, the term "or" is generally used in a sense that includes "and / or", unless the content clearly indicates otherwise. As used in the present invention, the term "several" is generally used in a sense that includes "at least one", unless the content clearly indicates otherwise. As used in the present invention, the term "at least two" is generally used in a sense that includes "two or more", unless the content clearly indicates otherwise. In addition, the terms "first", "second", and "third" are used only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first", "second", and "third" may explicitly or implicitly include one or at least two of the features.

[0025] Please refer to Figure 1 This embodiment provides a football field lawn root ventilation and negative pressure drainage system, including a ventilation and drainage network, an air-water separation well 201 and an air supply and exhaust module, wherein:

[0026] The ventilation and drainage pipe network includes a pipe network main line 101 and a plurality of pipe network branch lines 102. The pipe network branch lines 102 are uniformly distributed in the soil at the roots of the lawn and are interconnected with one end of the pipe network main line 101. The other end of the pipe network main line 101 is connected to the air-water separation well 201. The pipe network branch lines 102 are provided with a plurality of through holes.

[0027] The air supply and exhaust module includes a ventilation and air conditioning unit 301, a ventilation louver 302, an air supply and exhaust main line 303, a first bypass 304 and a second bypass 305. One end of the air supply and exhaust main line 303 is connected to the air-water separation well 201, and the other end of the air supply and exhaust main line 303 is connected to the ventilation louver 302. The ventilation and air conditioning unit 301 is arranged on the air supply and exhaust main line 303, and the air supply and exhaust main line 303 is provided with a first air valve 401 and a second air valve 402. The first air valve 401 is located between the ventilation and air conditioning unit 301 and the air-water separation well 201, and the second air valve 402 is located between the ventilation and air conditioning unit 301 and the ventilation louver 302. One end of the first bypass 304 is connected to the main supply and exhaust air line 303 between the first air valve 401 and the ventilation and air-conditioning unit 301, and the other end of the first bypass 304 is connected to the main supply and exhaust air line 303 between the second air valve 402 and the ventilation louver 302, and a third air valve 403 is provided on the first bypass 304, one end of the second bypass 305 is connected to the main supply and exhaust air line 303 between the air-water separation well 201 and the first air valve 401, and the other end of the second bypass 305 is connected to the main supply and exhaust air line 303 between the ventilation and air-conditioning unit 301 and the second air valve 402, and a fourth air valve 404 is provided on the second bypass 305.

[0028] By controlling the opening and closing of each air valve, the working requirements of air supply, exhaust and negative pressure drainage can be met, providing a suitable temperature environment for the roots of the lawn. At the same time, it can enhance the ventilation of the roots of the lawn and accelerate lawn drainage during heavy rain and rainstorms, providing a complete set of technical guarantee measures for high-quality lawns.

[0029] Specifically, the main pipeline 101 and several branch pipelines 102 of the pipeline network are made of HDPE pipes. The diameter of the main pipeline 101 of the pipeline network is between De400 and De700, and the diameter of the branch pipeline 102 of the pipeline network is between De100 and De200. Through holes are opened on the upper part of the branch pipeline 102 of the pipeline network. The aperture of the through holes is between 8mm and 12mm. The through holes are arranged at equal intervals along the axial direction of the branch pipeline 102 of the pipeline network, and the spacing is between 100mm and 200mm.

[0030] In this embodiment, the air-water separation well 201 is mainly used to collect rainwater to prevent rainwater from entering the ventilation and air-conditioning unit 301 through the main air supply and exhaust pipes 303 .

[0031] Preferably, the football field lawn root ventilation and negative pressure drainage system also includes a control module, and the ventilation and air conditioning unit 301, the first air valve 401, the second air valve 402, the third air valve 403 and the fourth air valve 404 are respectively connected to the control module in communication. The control module includes but is not limited to a PLC, which is mainly used to realize the automatic control of the football field lawn root ventilation and negative pressure drainage system, such as controlling the operation of the ventilation and air conditioning unit 301 and the opening and closing of each air valve to meet the switching requirements of different working conditions.

[0032] In this embodiment, PLC is a device well known in the art, and the present invention does not make any improvements thereto, nor does it involve improvements to computer programs. Those skilled in the art should know how to specifically implement the communication connection between the PLC and various components.

[0033] In this embodiment, the first air valve 401 , the second air valve 402 , the third air valve 403 , and the fourth air valve 404 are all electric air valves.

[0034] Please refer to Figure 2 The ventilation and air conditioning unit 301 includes a cooling and heating unit 3011 and a fan 3012 respectively connected to the control module. The fan 3012 is used to supply air to the ventilation and drainage network and to extract the exhaust air of the ventilation and drainage network. The cooling and heating unit 3011 is used to adjust the supply air temperature. In this embodiment, the cooling and heating unit 3011 is, for example, a cooling and heating coil, which is used to heat or cool the supply air according to the temperature requirement of the soil at the roots of the lawn. The fan 3012 is used to pressurize the supply air and extract the negative pressure exhaust air from the ventilation and drainage network.

[0035] Preferably, the ventilation and air-conditioning unit 301 also includes a temperature and humidity sensor 3013 and a humidifier 3014 respectively connected to the control module, the temperature and humidity sensor 3013 is used to monitor the temperature and humidity of the supply air, and the control module is used to control the operation of the cooling and heating unit 3011 and the humidifier 3014 according to the temperature and humidity monitored by the temperature and humidity sensor 3013.

[0036] For example, in summer, the temperature of the soil at the root of the lawn is monitored to be 29°C, which is compared with the set temperature of 13-27°C (which can be set according to the needs of different grass species). Obviously, the temperature exceeds the standard. The control module can be used to control the cooling and heating unit 3011 to increase the cooling capacity to reduce the air supply temperature, thereby reducing the temperature of the soil at the root of the lawn. When the soil temperature at the root of the lawn is lower than the set value range in winter, the control module can be used to control the cooling and heating unit 3011 to increase the heating capacity to increase the air supply temperature. At the same time, in order to avoid the "wind-drying" effect of dry hot air on the soil, the control module will synchronously control the humidifier 3014 to increase the moisture content of the air supply, thereby ensuring that the soil temperature at the root of the lawn is within the set value range and avoiding the soil from being dried out due to the hot air supply.

[0037] It should be understood that the temperature and humidity sensor 3013 can be used to simultaneously monitor the temperature and humidity of the soil at the roots of the lawn, or a temperature sensor and a humidity sensor can be used to separately monitor the temperature and humidity of the soil at the roots of the lawn, and the present invention does not impose any restrictions on this.

[0038] In addition, the ventilation and air conditioning unit 301 may further include at least one filter 3015 , which is disposed before the cooling and heating unit 3011 and is connected to the air inlet of the cooling and heating unit 3011 , and is used to filter and purify the air entering the cooling and heating unit 3011 .

[0039] Preferably, the ventilation and air-conditioning unit 301 also includes an electric bypass air valve 3016, which is communicatively connected to the control module. The electric bypass air valve 3016 is mainly used in the air supply condition when the exhaust, drainage and cooling and heating units 3011 do not need to work. At this time, opening the electric bypass air valve 3016 can significantly reduce the resistance borne by the fan 3012 and achieve energy-saving operation.

[0040] Preferably, the football field lawn root ventilation and negative pressure drainage system also includes a temperature sensor disposed in the lawn root soil, the temperature sensor is in communication connection with the control module, and the control module is used to adjust the operation of the cooling and heating unit 3011 according to the soil temperature monitored by the temperature sensor. For example, under the air supply condition, the control module monitors the temperature of the lawn root soil in real time through the temperature sensor, and adjusts the operation of the cooling and heating unit 3011 according to the real-time monitored soil temperature to ensure that the soil temperature is within the set range.

[0041] Preferably, a wind pressure sensor is provided on the pipe network main line 101 and is in communication with the control module. The control module is used to adjust the operating frequency of the fan 3012 according to the static pressure value monitored by the wind pressure sensor to maintain the static pressure value in the pipe network main line 101 within a set range.

[0042] For example, under air supply conditions, the static pressure at the wind pressure sensor is set to 1200Pa. When the static pressure value monitored in real time by the wind pressure sensor is 1400Pa, it means that the static pressure value is too large. The operating frequency of the fan 3012 can be appropriately reduced so that the static pressure value in the main pipe 101 of the pipe network reaches the set value. For example, under negative pressure drainage conditions, the static pressure at the wind pressure sensor is set to -1500Pa. When the static pressure value monitored in real time by the wind pressure sensor is -1300Pa, it means that the negative static pressure value is not enough. The operating frequency of the fan 3012 needs to be increased so that the static pressure value in the main pipe 101 of the pipe network reaches the set negative static pressure value to accelerate drainage.

[0043] Preferably, a submersible pump 202 and a liquid level sensor which are respectively communicatively connected to the control module are also provided in the gas-water separation well 201, and the control module is used to control the operation of the submersible pump 202 according to the liquid level value monitored by the liquid level sensor.

[0044] Specifically, when it is necessary to switch to the negative pressure drainage mode (generally, this mode is activated when it rains heavily or rainstorms to accelerate the drainage of the site), under the control of the control module, the first air valve 401 and the second air valve 402 are opened, the third air valve 403 and the fourth air valve 404 are closed, and the ventilation and air-conditioning unit 301 is started, so that the ventilation and drainage network enters a negative pressure state, and the air and rainwater in the soil at the roots of the lawn enter the interior of the network branch pipe 102 through the through holes on the network branch pipe 102. The exhaust air entering the network branch pipe 102 is discharged outdoors through the network main pipe 101, the air-water separation well 201, the supply and exhaust air main pipe 303, the ventilation and air-conditioning unit 301 and the ventilation louvers 302 in sequence, and the rainwater entering the network branch pipe 102 flows to the air-water separation well 201 through the network main pipe 101. At the same time, the control module monitors the liquid level in the gas-water separation well 201 in real time through the liquid level sensor, starts the submersible pump 202 to drain water in real time (such as discharging into a municipal rainwater well) when the liquid level reaches a high level, and shuts down the submersible pump 202 when the liquid level drops to a low level, so as to ensure that the liquid level in the gas-water separation well 201 is always between the high and low levels; at the same time, the control module calculates and adjusts the operating frequency of the fan 3012 through the static pressure value monitored by the wind pressure sensor, so as to ensure that the static pressure in the main pipeline 101 of the pipeline network is maintained at the set negative pressure value to accelerate drainage.

[0045] Preferably, the pipeline branch 102 is provided with a drainage slope and slopes toward the pipeline main pipeline 101, and the pipeline main pipeline 101 is provided with a drainage slope and slopes toward the gas-water separation well, so that rainwater entering the pipeline branch 102 flows by gravity along the drainage slope to the pipeline main pipeline 101, and then flows by gravity along the slope of the pipeline main pipeline 101 to the gas-water separation well 201.

[0046] Based on this, the embodiment of the utility model also provides a control method for controlling the working condition switching of the football field lawn root ventilation and negative pressure drainage system as described above, including:

[0047] When switching to the air supply mode, the first air valve 401 and the second air valve 402 are closed, the third air valve 403 and the fourth air valve 404 are opened, and the ventilation and air conditioning unit 301 is started, so that the outdoor air is sucked in through the ventilation louvers 302 and sequentially passes through the first bypass 304, the ventilation and air conditioning unit 301, the second bypass 305, the supply and exhaust air main line 303, the air-water separation well 201, and the pipe network main line 101 to enter each pipe network branch pipe 102, and then enters the soil at the root of the lawn through the through holes on the pipe network branch pipe 102;

[0048] When switching to the exhaust mode, the first air valve 401 and the second air valve 402 are opened, the third air valve 403 and the fourth air valve 404 are closed, and the ventilation and air conditioning unit 301 is started, so that the ventilation and drainage pipe network enters a negative pressure state, and the air in the soil at the root of the lawn enters the interior of the pipe network branch pipe 102 through the through hole on the pipe network branch pipe 102 and is discharged outdoors through the pipe network main pipe 101, the air-water separation well 201, the supply and exhaust main pipe 303 (flowing through the ventilation and air conditioning unit 301 thereon) and the ventilation louvers 302 in sequence;

[0049] When switched to the negative pressure drainage condition, the first air valve 401 and the second air valve 402 are opened, the third air valve 403 and the fourth air valve 404 are closed, and the ventilation and air-conditioning unit 301 is started to make the ventilation and drainage network enter a negative pressure state. The air and rainwater in the soil at the roots of the lawn enter the interior of the network branch pipe 102 through the through holes on the network branch pipe 102. The exhaust air entering the network branch pipe 102 is discharged outdoors through the network main pipe 101, the air-water separation well 201, the supply and exhaust air main pipe 303 (flowing through the ventilation and air-conditioning unit 301 thereon) and the ventilation louvers 302 in sequence. The rainwater entering the network branch pipe 102 flows to the air-water separation well 201 through the network main pipe 101.

[0050] Preferably, when switching to the air supply condition, the control module calculates and adjusts the operating frequency of the fan 3012 through the static pressure value monitored by the wind pressure sensor, so as to ensure that the static pressure in the main pipeline 101 of the pipeline network is maintained at a set positive pressure value to ensure smooth air supply; when switching to the exhaust or negative pressure drainage condition, the control module calculates and adjusts the operating frequency of the fan 3012 through the static pressure value monitored by the wind pressure sensor, so as to ensure that the static pressure in the main pipeline 101 of the pipeline network is maintained at a set negative pressure value to achieve negative pressure exhaust or drainage, thereby improving the efficiency of exhaust or drainage.

[0051] In summary, the embodiment of the utility model provides a football field lawn root ventilation and negative pressure drainage system, which can meet the working requirements of air supply, exhaust and negative pressure drainage by controlling the opening and closing of each air valve, provide a suitable temperature environment for the lawn roots, and at the same time enhance the ventilation and air exchange at the lawn roots, and accelerate the drainage of the lawn during heavy rain and rainstorms, providing a complete set of technical guarantee measures for high-quality lawns.

[0052] In addition, it should be recognized that although the present invention has been disclosed as a preferred embodiment, the above embodiment is not intended to limit the present invention. For any technician familiar with the art, without departing from the scope of the technical solution of the present invention, the above disclosed technical content can be used to make many possible changes and modifications to the technical solution of the present invention, or modified into equivalent embodiments of equivalent changes. Therefore, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the scope of protection of the technical solution of the present invention.

Claims

1. A football field lawn root ventilation and negative pressure drainage system, characterized in that: It includes ventilation and drainage pipe network, air-water separation well and air supply and exhaust modules, including: The ventilation and drainage pipe network includes a pipe network main pipe and a plurality of pipe network branch pipes, the pipe network branch pipes are uniformly distributed in the soil at the roots of the lawn and are interconnected with one end of the pipe network main pipe, the other end of the pipe network main pipe is connected to the air-water separation well, and the pipe network branch pipes are provided with a plurality of through holes; The air supply and exhaust module comprises a ventilation and air-conditioning unit, a ventilation louver, an air supply and exhaust main line, a first bypass and a second bypass, one end of the air supply and exhaust main line is connected to the gas-water separation well, and the other end of the air supply and exhaust main line is connected to the ventilation louver, the ventilation and air-conditioning unit is arranged on the air supply and exhaust main line, and a first air valve and a second air valve are arranged on the air supply and exhaust main line, the first air valve is located between the ventilation and air-conditioning unit and the gas-water separation well, the second air valve is located between the ventilation and air-conditioning unit and the ventilation louver, one end of the first bypass is connected to the air supply and exhaust main line between the first air valve and the ventilation and air-conditioning unit, the other end of the first bypass is connected to the air supply and exhaust main line between the second air valve and the ventilation louver, and a third air valve is arranged on the first bypass, one end of the second bypass is connected to the air supply and exhaust main line between the gas-water separation well and the first air valve, the other end of the second bypass is connected to the air supply and exhaust main line between the ventilation and air-conditioning unit and the second air valve, and a fourth air valve is arranged on the second bypass.

2. The football field lawn root ventilation and negative pressure drainage system according to claim 1 is characterized in that: The football field lawn root ventilation and negative pressure drainage system also includes a control module, and the ventilation and air-conditioning unit, the first air valve, the second air valve, the third air valve and the fourth air valve are respectively communicated with the control module.

3. The football field lawn root ventilation and negative pressure drainage system according to claim 2 is characterized in that: The first air valve, the second air valve, the third air valve and the fourth air valve are all electric air valves.

4. The football field lawn root ventilation and negative pressure drainage system according to claim 2 is characterized in that: The ventilation and air conditioning unit includes a cooling and heating unit and a fan respectively connected to the control module, the fan is used to supply air to the ventilation and drainage network and to extract exhaust air from the ventilation and drainage network, and the cooling and heating unit is used to adjust the supply air temperature.

5. The football field lawn root ventilation and negative pressure drainage system according to claim 4 is characterized in that: The ventilation and air-conditioning unit also includes a temperature and humidity sensor and a humidifier respectively connected to the control module, the temperature and humidity sensor is used to monitor the temperature and humidity of the supply air, and the control module is used to control the operation of the cooling and heating unit and the humidifier according to the temperature and humidity monitored by the temperature and humidity sensor.

6. The football field lawn root ventilation and negative pressure drainage system according to claim 4 or 5, characterized in that: The football field lawn root ventilation and negative pressure drainage system also includes a temperature sensor arranged in the soil at the root of the lawn. The temperature sensor is communicatively connected to the control module, and the control module is used to adjust the operation of the cooling and heating unit according to the soil temperature monitored by the temperature sensor.

7. The football field lawn root ventilation and negative pressure drainage system according to claim 4 is characterized in that: The main pipe of the pipe network is provided with a wind pressure sensor which is in communication with the control module, and the control module is used to adjust the operating frequency of the fan according to the static pressure value monitored by the wind pressure sensor.

8. The football field lawn root ventilation and negative pressure drainage system according to claim 2 is characterized in that: A submersible pump and a liquid level sensor which are respectively connected to the control module for communication are also provided in the gas-water separation well. The control module is used to control the operation of the submersible pump according to the liquid level value monitored by the liquid level sensor.

9. The football field lawn root ventilation and negative pressure drainage system according to claim 1, characterized in that: The branch pipeline of the pipeline network is provided with a drainage slope and slopes toward the main pipeline of the pipeline network, and the main pipeline of the pipeline network is provided with a drainage slope and slopes toward the gas-water separation well.

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