Ventilation and drainage system for lawn of playground

Abstract

The utility model relates to the technical field of drainage systems, in particular to a ventilation and drainage system for a lawn of a playground. The system comprises a lawn pipeline network, a gas-water separator and a centrifugal fan, the lawn pipeline network is connected with the gas-water separator, a plurality of submersible pumps are arranged in the gas-water separator, the system further comprises a pneumatic switching valve, the pneumatic switching valve comprises a shell, and a first pneumatic valve and a second pneumatic valve are arranged in the shell. The first pneumatic valve and the second pneumatic valve divide the shell into a first valve cavity, a second valve cavity and a third valve cavity, the second valve cavity is connected with the gas-water separator through a first air pipe, the first valve cavity is connected with an air inlet of the centrifugal fan through a fan air inlet pipe, and the first valve cavity is connected with an external air inlet and outlet through an air supply pipe. The third valve cavity is connected with an air outlet of the centrifugal fan through a fan air outlet pipe and connected with an external air inlet and outlet through an exhaust pipe. The ventilation and drainage effects can be achieved through the cooperation of the pneumatic switching valve and the electric air valve, the design is ingenious, and the structure is simple.

Description

Technical Field

[0001] The utility model relates to the technical field of drainage systems, in particular to a ventilation and drainage system for a sports field lawn. Background Art

[0002] A stadium is a place for outdoor physical exercise and competition. A large stadium is a comprehensive sports field. It usually has a standard track and field, and a standard football field (or rugby field) is set up inside the track and field. Most stadiums are inevitably affected by the weather, especially when encountering heavy rain or rainstorms, the rainwater may not be discharged in time, affecting the normal progress of sports events. The traditional underground drainage of stadiums is to install drainage layers and drainage pipes underground. However, the existing underground infiltration drainage design of sports venues cannot be discharged immediately after the water penetrates into the drainage pipes when encountering heavy rain or rainstorms. The drainage time is long, which causes the venue to be unable to be put into use as soon as possible, causing delays in the game. In addition, the high humidity environment is not conducive to the growth of the lawn.

[0003] The Chinese patent application number 202221866041.5 discloses a football field lawn ventilation and drainage system, including a lawn underground pipeline network evenly distributed under the football field lawn, the lawn underground pipeline network as a ventilation and drainage network, and also includes a fan unit, a fan pipeline and a water-gas separation pipe well; the fan unit is arranged on the fan pipeline, the fan pipeline includes an air suction pipeline and a blowing pipeline, the air suction pipeline and the blowing pipeline are respectively provided with a wind valve damper for adjusting the opening and closing of the air duct, one end of the fan pipeline is connected to the external air inlet and outlet, and the other end is connected to the water-gas separation pipe well; the water-gas separation pipe well is connected to the lawn underground pipeline network, and the water-gas separation pipe well is provided with an external drainage pipe. The lawn ventilation and drainage system realizes the ventilation and drainage function by blowing and sucking air on the underground foundation of the football field lawn, can change the high temperature and high humidity environment of the underground foundation of the lawn, and realize the health management of the football field lawn. However, the fan duct is composed of four three-way ducts, and a damper for adjusting the opening and closing of the air duct needs to be provided on the corresponding duct. Therefore, the duct system structure is relatively complex, occupies a large space, and is not convenient for installation and maintenance. Utility Model Content

[0004] The purpose of the utility model is to solve the technical problems that the fan pipeline of the existing underground lawn ventilation and drainage system has a complex structure, occupies a large space, and is not convenient for installation and maintenance. A sports field lawn ventilation and drainage system is provided, in which two pneumatic valves are arranged in the pneumatic switching valve, and an electric air valve is arranged on the supply and exhaust air ducts. Through the switching and coordination of the two pneumatic valves and the two electric air valves, the effects of negative pressure vacuum drainage and ventilation of the lawn can be achieved. The utility model has an ingenious design, a simple structure, low cost, and is easy to install and maintain. It can also meet the needs of ventilation and drainage in the process of sports field lawn maintenance, facilitates the maintenance of sports field lawns, and is suitable for popularization and application.

[0005] The utility model adopts the following technical scheme to achieve the above-mentioned purpose: a sports field lawn ventilation and drainage system, comprising a lawn pipeline network arranged under the sports field lawn and an air-water separator and a centrifugal fan arranged underground, wherein the lawn pipeline network is connected to the air-water separator, wherein a plurality of submersible pumps are arranged in the air-water separator, wherein the submersible pumps are connected to the drainage pipeline, wherein the drainage pipeline is connected to the municipal rainwater system, wherein the system further comprises a pneumatic switching valve, wherein the pneumatic switching valve comprises a shell with a cavity, wherein a first pneumatic valve and a second pneumatic valve are arranged in the shell, wherein the first pneumatic valve and the second pneumatic valve connect the shell The body is divided into a first valve chamber, a second valve chamber and a third valve chamber, the second valve chamber is connected to the gas-water separator through a first air duct, the first valve chamber is connected to the air inlet of the centrifugal fan through the fan air inlet pipe, the first valve chamber is also connected to the external air inlet and outlet through the air supply pipe, the air supply pipe is provided with a first electric air valve, the third valve chamber is connected to the centrifugal fan air outlet through the fan air outlet pipe, the third valve chamber is also connected to the external air inlet and outlet through the exhaust pipe, the exhaust pipe is provided with a second electric air valve, the centrifugal fan, the submersible pump, the first electric valve and the second electric valve are electrically connected to the control system respectively.

[0006] Furthermore, the lawn pipe network includes an inclined main pipe and multiple branch pipes connected to both sides of the main pipe. The branch pipe is inclined downward at one end close to the main pipe, and multiple through holes are opened on the branch pipe. The downward inclined end of the main pipe is connected to the air-water separator, and a pressure differential transmitter is provided at the other end of the main pipe. The pressure differential transmitter is electrically connected to the control system.

[0007] Furthermore, four submersible pumps are arranged in the gas-water separator, two of which have a power of 18.5 KW and the other two have a power of 30 KW.

[0008] Furthermore, a liquid level transmitter is also provided in the gas-water separator, and the liquid level transmitter is electrically connected to the control system.

[0009] Furthermore, the system also includes an oxygen sensor, which is arranged below the lawn of the sports field and is electrically connected to the control system.

[0010] Furthermore, the system also includes an integrated air compressor, which includes an air compressor, a dryer and an air storage tank connected in sequence. The integrated air compressor is respectively connected to the first pneumatic valve and the second pneumatic valve through an air pipe. A pressure gauge is provided on the air pipe. The pressure gauge and the integrated air compressor are respectively electrically connected to the control system.

[0011] Furthermore, a shock absorber throat, a check valve, a manual valve and a pneumatic regulating valve are sequentially arranged on the drainage pipe. The shock absorber throat is arranged close to one end of the submersible pump, and the pneumatic regulating valve is connected to the integrated air compressor through an air pipe.

[0012] Furthermore, a fire damper is provided on the first air duct, and the fire damper is electrically connected to the control system.

[0013] Furthermore, a drain pipe is connected to the lower portion of the first air duct, and a drain valve is provided on the drain pipe.

[0014] Furthermore, the air supply duct and the air exhaust duct are both connected to the external air inlet and outlet through a second air duct, a muffler is provided on the second air duct, and a shutter is provided at the external air inlet and outlet.

[0015] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0016] (1) The utility model relates to a ventilation and drainage system for sports field lawns. A ventilation and drainage pipe network is laid under the sports field lawns. An air-water separator, a centrifugal fan and a pneumatic switching valve are arranged underground. Two pneumatic valves are arranged inside the pneumatic switching valve. An electric air valve is arranged on the air supply and exhaust pipes connected to the pneumatic switching valve. By switching and coordinating the two pneumatic valves and the two electric air valves, the effects of negative pressure vacuum drainage and ventilation of the lawn can be achieved. The utility model has an ingenious design, a simple structure, a low cost, and is easy to install and maintain. It can also meet the ventilation and drainage requirements during the maintenance of sports field lawns, facilitates the maintenance of sports field lawns, and is suitable for popularization and application.

[0017] (2) In the sports field lawn ventilation and drainage system of the utility model, two submersible pumps in the air-water separator form a group, which can be started at the same time according to the working conditions. Each time it is started, one pump in each group is operated first, and each group of water pumps is started in a rotating manner. If the liquid level continues to drop, the other two water pumps are not started. If the liquid level continues to rise, the other two water pumps are started. The four water pumps work at the same time until the water level reaches the low level and the water pumps stop working. Through the cooperation of the liquid level transmitter, it can meet the needs of different drainage volumes, and its application is more flexible.

[0018] (3) In the sports field lawn ventilation and drainage system of the utility model, a pneumatic regulating valve is provided on the drainage pipe. If the drainage time of the water in the air-water separator is less than 10 minutes, the opening of the pneumatic regulating valve is adjusted to return part of the water discharged into the main pipe to the air-water separator, thereby ensuring that the drainage pump can work continuously for at least about 30 minutes or continue to work without stopping, thereby extending the service life of the drainage pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a structural diagram of the sports field lawn ventilation and drainage system of the utility model.

[0020] Figure 2 The utility model is a schematic diagram of air flow during exhaustion of the sports field lawn ventilation and drainage system.

[0021] Figure 3 The utility model is a schematic diagram of air flow when the sports field lawn ventilation and drainage system supplies air.

[0022] In the figure: 1. air-water separator, 2. centrifugal fan, 3. ventilation room, 4. main pipeline, 5. branch pipeline, 6. differential pressure transmitter, 7. submersible pump, 8. drainage pipeline, 9. municipal rainwater system, 10. shock absorber throat, 11. check valve, 12. manual valve, 13. pneumatic regulating valve, 14. air pipe, 15. integrated air compressor, 151. air compressor, 152. dryer, 153. air storage tank, 16. pressure gauge, 17 .Liquid level transmitter, 18. Pneumatic switching valve, 19. First pneumatic valve, 20. Second pneumatic valve, 21. First air duct, 22. Fire damper, 23. Drain pipe, 24. Drain valve, 25. Fan air inlet pipe, 26. Air supply pipe, 27. First electric valve, 28. Fan air outlet pipe, 29. Exhaust pipe, 30. Second electric valve, 31. Second air duct, 32. External air inlet and outlet, 33. Muffler, 34. Oxygen sensor. DETAILED DESCRIPTION

[0023] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments, but the present invention is not limited to the specific embodiments.

[0024] like Figure 1A sports field lawn ventilation and drainage system shown in the figure includes a lawn pipe network arranged under the sports field lawn and an air-water separator 1 and a centrifugal fan 2 arranged underground. The centrifugal fan 2 is arranged in a ventilation room 3 and is electrically connected to a control system. The lawn pipe network includes two inclined main pipes 4 and a plurality of branch pipes 5 connected to both sides of the main pipes 4. The two main pipes 4 are arranged at intervals along the long axis direction of the lawn. The branch pipe 5 is inclined downwardly near one end of the main pipe 4, and a plurality of through holes are provided on the branch pipe 4. The downwardly inclined end of the main pipe 4 is connected to the air-water separator 1, thereby causing the water in the branch pipe 5 and the main pipe 4 to be discharged into the air-water separator 1. A pressure differential transmitter 6 is arranged at the other end of the main pipe 4, and the pressure differential transmitter 6 is electrically connected to the control system. The centrifugal fan 2 adopts frequency conversion control. The fan frequency is controlled according to the pressure differential value relative to the atmospheric pressure detected by the terminal pressure differential transmitter 6, and the pressure differential can be set.

[0025] Four submersible pumps 7 are arranged in the gas-water separator 2, of which two submersible pumps 7 have a power of 18.5KW, and the two submersible pumps 7 are connected to the DN150 drainage pipe 8 respectively, and the power of the other two submersible pumps 7 is 30KW, and the two submersible pumps 7 are connected to the DN200 drainage pipe 8 respectively. Each drainage pipe 8 is connected to the municipal rainwater system 9. The drainage pipe 8 is sequentially provided with a shock-absorbing throat 10, a check valve 11, a manual valve 12 and a pneumatic regulating valve 13. The shock-absorbing throat 10 is arranged near one end of the submersible pump 7, and the pneumatic regulating valve 13 is connected to the air pipe. 14 is connected to an integrated air compressor 15, a pressure gauge 16 is provided on the air pipe 14, the integrated air compressor 15 is arranged in the ventilation room 3, the integrated air compressor 15 includes an air compressor 151, a dryer 152 and an air storage tank 153 connected in sequence, the submersible pump 7, the pressure gauge 16 and the integrated air compressor 15 are electrically connected to the control system respectively, and a liquid level transmitter 17 is also provided in the gas-water separator 2, and the liquid level transmitter 17 is electrically connected to the control system. Through the cooperation of the liquid level transmitter 17, the requirements of different displacement can be met, and its application is more flexible.

[0026] The lawn ventilation and drainage system also includes a pneumatic switching valve 18, which includes a shell with a cavity, in which a first pneumatic valve 19 and a second pneumatic valve 20 are arranged, and the first pneumatic valve 19 and the second pneumatic valve 20 are connected to the integrated air compressor 15 through an air pipe 14, and the first pneumatic valve 19 and the second pneumatic valve 20 separate the shell into a first valve cavity, a second valve cavity and a third valve cavity, and the second valve cavity is connected to the air-water separator 2 through a first air duct 21, and a fire damper 22 is arranged on the first air duct 21, and the fire damper 22 is electrically connected to the control system, and the lower part of the first air duct 21 is connected to the air-water separator 2 through a first air duct 21. The first valve chamber is connected to the air inlet of the centrifugal fan 2 through the fan air inlet pipe 25, and the first valve chamber is also connected to the external air inlet and outlet through the air supply pipe 26, and the first electric air valve 27 is provided on the air supply pipe 26; the third valve chamber is connected to the air outlet of the centrifugal fan 2 through the fan air outlet pipe 28, and the third valve chamber is also connected to the external air inlet and outlet through the exhaust pipe 29, and the second electric air valve 30 is provided on the exhaust pipe 29; the fire damper 22, the first electric valve 27 and the second electric valve 30 are electrically connected to the control system respectively.

[0027] Preferably, the air supply duct 26 and the exhaust duct 29 are connected to the external air inlet and outlet 32 ​​through the second air duct 31. A muffler 33 is provided on the second air duct 31. By providing the muffler 33, wind noise can be reduced. The external air inlet and outlet 32 ​​is provided with shutters.

[0028] Preferably, the system further comprises an oxygen sensor 34, which is disposed below the lawn of the sports field and is electrically connected to the control system.

[0029] The utility model discloses a sports field lawn ventilation and drainage system. When in use, two submersible pumps 7 in the gas-water separator 2 form a group, which are controlled by industrial frequency and adopt dual power supply. They can be started at the same time according to the working condition requirements. Each time the system is started, one of the pumps in each group is operated first. Each group of water pumps is started in a mutual rotation mode. When the liquid level reaches the start water pump signal, a 18.5KW and a 30KW water pump are started by default. The trend of the water level detected by the liquid level transmitter 17 is judged. If the liquid level continues to drop, the other two water pumps are not started. If the liquid level continues to rise, the other two water pumps are started. The four water pumps work at the same time until the water level reaches the low liquid level and the water pump stops working. In any case, when the water pump is draining, the speed of the water level drop is judged. If the gas-water separator If the draining time of the water in the gas-water separator 2 is less than 10 minutes (subject to the actual debugging time), the opening of the PV1-PV4 pneumatic regulating valve 13 is proportionally adjusted to return part of the water discharged into the main pipeline to the gas-water separator 2, ensuring that the drainage pump can work continuously for at least about 30 minutes or continue to work without stopping (in the case of continuous rain, the pneumatic regulating valve is not allowed to be fully opened, and all the discharged water flows back to the pool), thereby extending the service life of the drainage pump. When the water pump is started, the air compressor is started in conjunction. The air compressor itself can also be in standby mode all year round. It will automatically start when the pressure is lower than the set value. It is necessary to add an operating status indication on the human-machine interface and install a pressure gauge 16 on the compressed air pipeline. If pressure loss is detected, the system will issue an audible and visual alarm.

[0030] The exhaust and air supply share a centrifugal fan, which can control the pneumatic switching valve 18 and the electric air valve to change the fan function. The exhaust and air supply functions are divided into manual / automatic modes. Even the manual mode can be switched manually with one button. The automatic mode is linked to the start signal of the submersible pump 7. That is, when rainwater flows into the air-water separator 2, the water pump automatically starts to drain, and the corresponding fan automatically starts to turn on the vacuum drainage function.

[0031] When exhausting, the pneumatic switching valve 18 is switched to the position closest to the fan outlet, separating the first air duct 21 from the fan outlet, that is, the first pneumatic valve 19 is opened, the second pneumatic valve 20 is closed, and the first electric air valve 27 is closed and the second electric air valve 30 is opened. Figure 2 The exhaust air flows in the direction shown, thereby achieving the exhaust purpose.

[0032] When air is supplied, the pneumatic switching valve 18 is switched to the position farthest from the fan outlet, separating the second air duct 31 from the fan air inlet, that is, the first pneumatic valve 19 is closed, the second pneumatic valve 20 is opened, and the second electric air valve 30 is closed and the first electric air valve 27 is opened. Figure 3 The fresh air and supply air flow in the directions shown, thereby achieving the purpose of air supply.

[0033] The human-machine interface of the control system has operating status, fault feedback, etc., and alarm records can be set. When there is an alarm record, the automatic mode is not available. The automatic mode can be started after the fault is eliminated. The manual mode can be used, but the administrator password must be obtained before operation.

[0034] The utility model discloses a sports field lawn ventilation and drainage system, a ventilation and drainage pipe network is laid under the sports field lawn, an air-water separator, a centrifugal fan and a pneumatic switching valve are arranged underground, two pneumatic valves are arranged in the pneumatic switching valve, and an electric air valve is arranged on the air supply and exhaust pipes connected to the pneumatic switching valve, and the switching and coordination of the two pneumatic valves and the two electric air valves can achieve the effects of negative pressure vacuum drainage and ventilation of the lawn, the utility model has ingenious design, simple structure, low cost, easy installation and maintenance, can meet the needs of ventilation and drainage in the process of sports field lawn maintenance, is convenient for sports field lawn maintenance, and is suitable for popularization and application.

[0035] The above contents are further detailed descriptions of the utility model in combination with the preferred technical solutions, and the specific implementation of the utility model cannot be limited to these descriptions. For ordinary technicians in the technical field to which the utility model belongs, simple deductions and substitutions can be made without departing from the concept of the utility model, which should be regarded as the protection scope of the utility model.

Claims

1. A sports field lawn ventilation and drainage system, comprising a lawn pipeline network arranged under the sports field lawn and an air-water separator and a centrifugal fan arranged underground, characterized in that: The lawn pipe network is connected to the air-water separator, and multiple submersible pumps are arranged in the air-water separator. The submersible pump is connected to the drainage pipe, and the drainage pipe is connected to the municipal rainwater system. The system also includes a pneumatic switching valve, which includes a shell with a cavity, and a first pneumatic valve and a second pneumatic valve are arranged in the shell. The first pneumatic valve and the second pneumatic valve separate the shell into a first valve chamber, a second valve chamber and a third valve chamber. The second valve chamber is connected to the air-water separator through a first air duct, and the first valve chamber is connected to the air inlet of the centrifugal fan through a fan air inlet pipe. The first valve chamber is also connected to the external air inlet and outlet through an air supply pipe. A first electric air valve is arranged on the air supply pipe, and the third valve chamber is connected to the air outlet of the centrifugal fan through a fan air outlet pipe. The third valve chamber is also connected to the external air inlet and outlet through an exhaust pipe. A second electric air valve is arranged on the exhaust pipe. The centrifugal fan, the submersible pump, the first electric valve and the second electric valve are electrically connected to the control system respectively.

2. A sports field lawn ventilation and drainage system according to claim 1, characterized in that: The lawn pipe network includes an inclined main pipe and multiple branch pipes connected to both sides of the main pipe. The branch pipe is inclined downward at one end close to the main pipe, and multiple through holes are opened on the branch pipe. The downward inclined end of the main pipe is connected to the air-water separator, and the other end of the main pipe is provided with a differential pressure transmitter, and the differential pressure transmitter is electrically connected to the control system.

3. A sports field lawn ventilation and drainage system according to claim 1, characterized in that: Four submersible pumps are arranged in the gas-water separator, two of which have a power of 18.5 KW and the other two have a power of 30 KW.

4. A sports field lawn ventilation and drainage system according to claim 3, characterized in that: A liquid level transmitter is also arranged in the gas-water separator, and the liquid level transmitter is electrically connected to the control system.

5. The sports field lawn ventilation and drainage system according to claim 1, characterized in that: The system further comprises an oxygen sensor, which is arranged below the lawn of the sports field and is electrically connected to the control system.

6. The sports field lawn ventilation and drainage system according to claim 1, characterized in that: The system also includes an integrated air compressor, which includes an air compressor, a dryer and an air storage tank connected in sequence. The integrated air compressor is connected to the first pneumatic valve and the second pneumatic valve respectively through an air pipe. A pressure gauge is provided on the air pipe. The pressure gauge and the integrated air compressor are electrically connected to the control system respectively.

7. A sports field lawn ventilation and drainage system according to claim 6, characterized in that: The drainage pipe is provided with a shock-absorbing throat, a check valve, a manual valve and a pneumatic regulating valve in sequence. The shock-absorbing throat is arranged close to one end of the submersible pump, and the pneumatic regulating valve is connected to the integrated air compressor through an air pipe.

8. The sports field lawn ventilation and drainage system according to claim 1, characterized in that: The first air duct is provided with a fire damper, and the fire damper is electrically connected to the control system.

9. The sports field lawn ventilation and drainage system according to claim 1, characterized in that: The lower part of the first air duct is connected with a drain pipe, and the drain pipe is provided with a drain valve.

10. The sports field lawn ventilation and drainage system according to claim 1, characterized in that: The air supply pipe and the air exhaust pipe are both connected to the external air inlet and outlet through the second air duct, the second air duct is provided with a muffler, and the external air inlet and outlet are provided with shutters.

Images