Vacuum drainage system for maintenance-free tunnel

Abstract

The invention discloses a maintenance-free tunnel vacuum drainage system which comprises a vacuum water storage tank, a claw type vacuum pump set, a cam drainage pump set, an intelligent master control, an outdoor function well and a water collection pit well. The vacuum water storage tank and the claw type vacuum pump set are connected together, and the claw type vacuum pump set and the intelligent master control are connected together; one end of the vacuum water storage tank is connected with an interface valve, the other end of the interface valve is connected with the water collection pit well, the water collection pit well is connected with the intelligent master controller, the vacuum water storage tank is connected with the cam drainage pump group, and the cam drainage pump group is connected with the intelligent master controller. By means of the vacuum negative pressure principle, large pressure difference can be generated, sewage can be rapidly sucked to a drainage pipeline, compared with traditional gravity drainage, the retention time of the sewage in a tunnel is greatly shortened, the drainage speed is increased, the situation that a large amount of water is accumulated suddenly in the tunnel can be effectively handled, and sensors distributed in the system sense water volume changes in real time.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of maintenance-free tunnel vacuum drainage, in particular to a maintenance-free tunnel vacuum drainage system. BACKGROUND

[0002] The tunnel vacuum drainage system is currently gradually increasing in application, and plays a key role in tunnel drainage due to its unique advantages. It uses negative pressure suction principle, can be installed and laid flexibly in limited tunnel space, has small pipe diameter, can quickly and efficiently drain the wastewater generated during construction and the underground water seepage during operation, greatly reduces the risk of water accumulation, ensures the dryness of the tunnel internal environment, avoids the damage of facilities due to water immersion, and provides solid protection for the safe and efficient operation of the tunnel. Moreover, the system has high integration degree, is convenient for unified management and maintenance, and can realize real-time monitoring and adjustment of the drainage state through the intelligent control system.

[0003] At present, there is no effective solution to the problems in the related art.

[0004] 1. When the existing maintenance-free tunnel vacuum drainage system is used, although the sewage flow rate in the vacuum drainage system is high, if the water contains large particles of impurities, construction waste, etc., it is still possible to form blockage at some parts of the pipeline, such as elbows, reducers, etc. Once blockage occurs, since the pipeline is under negative pressure, the unblocking operation is relatively complex, and requires special equipment and technical personnel to handle.

[0005] 2. Large equipment failure impact: The normal operation of the system depends on the stable work of key equipment such as vacuum pumps. If the vacuum pump fails, such as mechanical failure, motor damage, etc., the negative pressure in the system cannot be maintained, which will affect the drainage effect, and may even cause problems such as sewage backflow. Moreover, maintenance after equipment failure requires a certain period of time, and the tunnel drainage may face great pressure during this period.

[0006] 3. Certain requirements for water quality: If the drainage in the tunnel contains corrosive substances, it may cause corrosion to the pipeline and equipment, reducing their service life. In addition, some mineral components in the water may form scale on the inner wall of the pipeline, affecting the water carrying capacity of the pipeline and the drainage efficiency of the system.

[0007] 4. Large initial investment: The construction of the vacuum drainage system requires the purchase of professional equipment such as vacuum pumps and intelligent control systems, and the installation and laying of the pipeline also requires high technical requirements and costs, so the initial investment is much higher than that of the traditional drainage system. SUMMARY

[0008] In view of the problems in the related art, the present application proposes a maintenance-free tunnel vacuum drainage system to overcome the above technical problems existing in the prior art.

[0009] To this end, the specific technical solutions adopted by the present application are as follows: The maintenance-free tunnel vacuum drainage system comprises a vacuum water storage tank, a claw type vacuum pump group, a cam drainage pump group, an intelligent main control, an outdoor functional well and a catchment pit well, the vacuum water storage tank and the claw type vacuum pump group are connected together, the claw type vacuum pump group and the intelligent main control are connected together, one end of the vacuum water storage tank is connected with an interface valve, the other end of the interface valve is connected with the catchment pit well, the catchment pit well and the intelligent main control are connected together, the vacuum water storage tank and the cam drainage pump group are connected together, the cam drainage pump group and the intelligent main control are connected together, and the outdoor functional well and the cam drainage pump group are connected together.

[0010] Further improvement of the technical scheme of the present application is that a vacuum electric control valve is arranged between the vacuum water storage tank and the claw type vacuum pump group, the vacuum electric control valve is connected together with the vacuum water storage tank and the claw type vacuum pump group through a vacuum pipe, one end of the claw type vacuum pump group is provided with a vacuum exhaust pipe, and one end of the vacuum water storage tank is provided with a liquid level sensor C, a pressure sensor and a pressure gauge.

[0011] By adopting the above technical scheme, the liquid level sensor C in the scheme is used to monitor the liquid level height in the vacuum water storage tank, to provide a liquid level signal for the intelligent main control and to control the drainage time. The pressure sensor is used to monitor the pressure in the system and to feed back to the intelligent main control, so as to ensure that the system operates in a proper pressure range. The pressure gauge can directly display the pressure value of the system, which is convenient for manual inspection and fault troubleshooting. The vacuum water storage tank can store the sewage collected in the tunnel, to provide a buffer space for the system, to temporarily store the sewage in a vacuum state, and the claw type vacuum pump group can establish and maintain the vacuum environment in the system through air extraction, which is a key power equipment for realizing vacuum drainage. The claw type vacuum pump is adopted, the vacuum exhaust pipe is used to exhaust the gas extracted by the vacuum unit, the vacuum electric control valve controls the opening and closing of the vacuum pipeline, adjusts the vacuum degree, and the vacuum pipe is used to connect the vacuum unit and the vacuum water storage tank, to establish a vacuum through air extraction.

[0012] Further improvement of the technical scheme of the present application is that a first control cable is connected between the claw type vacuum pump group and the intelligent main control, and a tenth control cable is connected between the vacuum electric control valve and the intelligent main control.

[0013] By adopting the above technical scheme, the intelligent main control in the scheme is the control center of the system, receives signals of various sensors, controls the operation of various electric control valves, pump groups and other equipment, and realizes automatic control.

[0014] Further improvement of the technical scheme of the present application is that a second control cable and a third control cable are connected between the vacuum water storage tank and the intelligent main control, one end of the intelligent main control is connected with a wireless module, and one end of the intelligent main control is connected with an external data cable.

[0015] Adopting the technical scheme, the wireless module can realize wireless data transmission between the system and the remote control terminal, facilitating remote monitoring and management.

[0016] Further improvement of the technical scheme is that the vacuum water storage tank and the interface valve are connected with an air pipe electric control valve, the air pipe electric control valve and the intelligent master control are connected with a ninth control cable, the air pipe electric control valve and the vacuum water storage tank are connected with a water inlet negative pressure air pipe, and the vacuum water storage tank and the interface valve are connected with a water inlet pipe.

[0017] Adopting the technical scheme, the air pipe electric control valve is used for controlling opening and closing of the water inlet negative pressure air pipe, so as to control air pressure in the interface valve, the water inlet negative pressure air pipe is used for air path channel between the interface valve and the vacuum water storage tank, the interface valve is used for adopting a rubber pipe type clamp valve, controls sewage from the water suction pipe into the vacuum water storage tank, prevents water backflow, and the water inlet pipe is used for conveying sewage from the water collecting pit well to the vacuum water storage tank.

[0018] Further improvement of the technical scheme is that the interface valve and the water collecting pit well are connected with a water suction pipe, the water collecting pit well and the intelligent master control are connected with a seventh control cable, and the upper end of the water collecting pit well is provided with a liquid level sensor B.

[0019] Adopting the technical scheme, the water collecting pit well is used for collecting sewage in the tunnel, is a starting collection point of sewage into the drainage system, the water suction pipe is used for conveying sewage in the water collecting pit to the vacuum water storage tank, and the liquid level sensor B is used for monitoring liquid level in the water collecting pit, and provides a signal for starting water suction of the system.

[0020] Further improvement of the technical scheme is that the intelligent master control and the cam drainage pump group are connected with an eighth control cable, the cam drainage pump group and the vacuum water storage tank are connected with a proximal end drainage pipe, the cam drainage pump group and the vacuum water storage tank are connected with a pressure balance pipe, the bottom of the vacuum water storage tank is provided with a first maintenance valve and a second maintenance valve, the first maintenance valve, the second maintenance valve and the cam drainage pump group are connected, one end of the cam drainage pump group is connected with a drainage electric control valve, the drainage electric control valve and an outdoor functional well are connected with a distal end drainage pipe, the drainage electric control valve and the intelligent master control are connected with a sixth control cable, one side of the distal end drainage pipe is provided with a liquid level sensor A, the liquid level sensor A and the intelligent master control are connected with a fifth control cable.

[0021] The pressure balance pipe is used for balancing the pressure of the vacuum water storage tank and the inlet end of the near cam drainage pump group, ensuring stable operation of the system, the drainage electric control valve is used for controlling the opening and closing of the sewage from the cam drainage pump group to the far end drainage pipe, adjusting the drainage process, the liquid level sensor A is used for monitoring the liquid level height in the far end drainage pipe, providing a liquid level signal for the intelligent master control, controlling the reverse drainage time of the cam drainage pump group, and the cam drainage pump group is an elastomer cam rotor pump group, which lifts and discharges the sewage in the vacuum water storage tank to the far end drainage pipe network, and provides drainage power.

[0022] Further improvement of the technical scheme of the present application is that the interior of the outdoor functional well is provided with a ventilation electric control valve and a check valve, the upper end of the ventilation electric control valve is provided with a waterproof cap, a fourth control cable is connected between the ventilation electric control valve and the intelligent master control, and the upper end of the check valve is provided with a terminal drainage pipe.

[0023] With the above technical scheme, the waterproof cap is installed at the top end of the ventilation pipe to prevent sundries, rainwater and the like from entering the ventilation pipe and protect the ventilation function. The ventilation pipe can balance the atmospheric pressure of the system and the outside to ensure normal operation of the system. The ventilation electric control valve controls the opening and closing of the ventilation pipe. The terminal drainage pipe is used for discharging the sewage to the outdoor functional well. The check valve prevents backflow of the sewage to ensure one-way flow of the sewage. The outdoor functional well is used for installing and repairing part of the equipment of the system, providing operation space and protecting the equipment from the influence of the external environment.

[0024] The present application has the following advantages: 1. By using the vacuum negative pressure principle, a large pressure difference can be generated to quickly suck the sewage into the drainage pipe. Compared with the traditional gravity drainage, the sewage residence time in the tunnel is greatly shortened, the drainage speed is accelerated, the sudden large amount of water in the tunnel can be effectively dealt with, the distributed sensors in the system can sense the water quantity change in real time, the intelligent control system can automatically control the vacuum pump according to the data, finely adjust the negative pressure, and is not disturbed by too many external factors such as rain intensity, and can maintain stable drainage in extreme weather.

[0025] 2. The main equipment such as vacuum pump, pressure sensor, etc. is made of high-quality materials, which is durable and stable. Real-time monitoring devices are provided to monitor key parameters. When the main equipment fails, the standby equipment can automatically switch to operation in a short time to ensure uninterrupted drainage. With the cooperation of pressure balance pipe, air control valve and other components, the pressure in the system is stable, ensuring the normal operation of each equipment and avoiding drainage failure caused by abnormal pressure 3. The pipeline laying does not require strict slope requirements and can be flexibly arranged according to the actual space and direction of the tunnel. It can be raised, sunk, turned, and bypassed obstacles, suitable for various complex tunnel terrains, reducing the construction difficulty and cost caused by the slope requirement of the drainage pipeline during tunnel construction. Under the action of negative pressure, sewage flows quickly, which has a scouring effect on the inner wall of the pipeline, reducing the risk of dirt adhesion and blockage. Part of the system can also use gas-liquid mixed liquid backflow to scour the drainage pipe, further preventing blockage. The entire system is sealed and has no leakage and odor escape, avoiding sewage leakage and pollution of the surrounding soil and groundwater, and preventing odors from affecting the tunnel environment 4. The intelligent master control serves as the control center of the system, combined with liquid level sensors, pressure sensors, etc. to realize automatic control and monitoring. The system operation status can be monitored in real time, and remote monitoring and management are convenient for timely discovery and processing of potential problems. The system design reduces the number of vulnerable components and complex mechanical structures, and the pipeline is less likely to be blocked and the equipment has high stability, reducing maintenance requirements and frequency, saving maintenance costs and manpower, and highly integrated design. The intelligent diagnosis function can quickly locate the faulty components, and maintenance personnel can accurately repair or replace them, shortening the maintenance time 5. Compared with some traditional drainage systems that require high-power water pumps to run continuously, this system uses vacuum negative pressure for efficient drainage, which reduces energy consumption to some extent. If some parts of the system use environmentally friendly materials (such as recyclable high-density polyethylene pipes), carbon emissions and pollution of the surrounding environment during production can be reduced, and the risk of soil and groundwater pollution caused by sewage leakage can be reduced. BRIEF DESCRIPTION OF DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0027] Figure 1 is a schematic diagram of a maintenance-free vacuum drainage system for tunnels according to an embodiment of the present application In the figure: 1, vacuum water storage tank; 2, claw type vacuum pump group; 3, cam drainage pump group; 4, intelligent main control; 5, outdoor functional well; 6, water collecting pit well; 7, water pumping pipe; 8, air pipe electric control valve; 9, water inlet negative pressure air pipe; 10, interface valve; 11, pressure balance pipe; 12, drainage electric control valve; 13, liquid level sensor A; 14, liquid level sensor C; 15, pressure sensor; 16, pressure gauge; 17, wireless module; 18, external data cable; 19, waterproof cap; 20, breather pipe; 21, breather electric control valve; 22, terminal drainage pipe; 23, check valve; 24, proximal drainage pipe; 25, distal drainage pipe; 26, vacuum exhaust pipe; 27, vacuum electric control valve; 28, vacuum pumping pipe; 29, water inlet pipe; 30, liquid level sensor B; 31, first maintenance valve; 32, second maintenance valve; 33, first control cable; 34, second control cable; 35, third control cable; 36, fourth control cable; 37, fifth control cable; 38, sixth control cable; 39, seventh control cable; 40, eighth control cable; 41, ninth control cable; 42, tenth control cable. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0029] According to an embodiment of the present application, a kind of vacuum drainage system for maintenance-free tunnel is provided.

[0030] Embodiment one; As Figure 1 shown, according to the vacuum drainage system for maintenance-free tunnel of the embodiment of the present application, including vacuum water storage tank 1, claw type vacuum pump group 2, cam drainage pump group 3, intelligent main control 4, outdoor functional well 5, water collecting pit well 6, vacuum water storage tank 1 and claw type vacuum pump group 2 are connected together, claw type vacuum pump group 2 and intelligent main control 4 are connected together, one end of vacuum water storage tank 1 is connected with interface valve 10, the other end of interface valve 10 and water collecting pit well 6 are connected together, water collecting pit well 6 and intelligent main control 4 are connected together, vacuum water storage tank 1 and cam drainage pump group 3 are together, cam drainage pump group 3 and intelligent main control 4 are connected together, outdoor functional well 5 and cam drainage pump group 3 are connected together.

[0031] In the embodiment, by using the vacuum negative pressure principle, a larger pressure difference can be generated, so that the sewage can be quickly sucked into the drainage pipeline. Compared with the traditional gravity drainage, the sewage residence time in the tunnel is greatly shortened, the drainage speed is accelerated, the sudden large amount of water accumulation in the tunnel can be effectively responded, the distributed sensors in the system can sense the water amount change in real time, the intelligent control system can automatically regulate the vacuum pump according to the data, the negative pressure size can be finely adjusted, the system is not disturbed by too many external factors such as rain intensity, and stable drainage can be maintained in extreme weather.

[0032] Embodiment two; As Figure 1 shown, according to the maintenance-free tunnel vacuum drainage system of the embodiment of the application, a vacuum electric control valve 27 is arranged between the vacuum water storage tank 1 and the claw type vacuum pump group 2, the vacuum electric control valve 27 is connected together with the vacuum water storage tank 1 and the claw type vacuum pump group 2 through the vacuum suction pipe 28, one end of the claw type vacuum pump group 2 is provided with a vacuum exhaust pipe 26, one end of the vacuum water storage tank 1 is provided with a liquid level sensor C14, a pressure sensor 15 and a pressure gauge 16, the claw type vacuum pump group 2 and the intelligent main control 4 are connected with a first control cable 33, the vacuum electric control valve 27 and the intelligent main control 4 are connected with a tenth control cable 42, the vacuum water storage tank 1 and the intelligent main control 4 are connected with a second control cable 34 and a third control cable 35, one end of the intelligent main control 4 is connected with a wireless module 17, one end of the intelligent main control 4 is connected with an external data cable 18, the vacuum water storage tank 1 and the interface valve 10 are connected with the air pipe electric control valve 8, the air pipe electric control valve 8 and the intelligent main control 4 are connected with a ninth control cable 41, the air pipe electric control valve 8 and the vacuum water storage tank 1 are connected with the water inlet negative pressure air pipe 9, and the vacuum water storage tank 1 and the interface valve 10 are connected with the water inlet pipe 29.

[0033] In this embodiment, the liquid level sensor C14 is used to monitor the liquid level height in the vacuum water storage tank 1, to provide a liquid level signal for the intelligent master control 4 to control the drainage timing. The pressure sensor 15 is used to monitor the pressure in the system, to feed back to the intelligent master control 4, to ensure that the system operates in the appropriate pressure range. The pressure gauge 16 can directly display the system pressure value, which is convenient for manual inspection and troubleshooting. The vacuum water storage tank 1 can store the sewage collected in the tunnel, to provide a buffer space for the system, to achieve temporary storage of sewage in a vacuum state. The claw type vacuum pump set 2 can establish and maintain the vacuum environment in the system by air extraction, and is the key power equipment for realizing vacuum drainage. The claw type vacuum pump is used, the vacuum exhaust pipe 26 is used to exhaust the gas extracted by the vacuum unit, the vacuum electric control valve 27 controls the opening and closing of the vacuum pipeline, adjusts the vacuum degree, and the vacuum extraction pipe 28 is used to connect the vacuum unit and the vacuum water storage tank 1, to establish a vacuum by air extraction. The intelligent master control 4 is the control center of the system, receives signals from various sensors, controls the operation of various electric control valves, pump sets and other equipment, and realizes automatic control. The wireless module 17 can realize wireless data transmission between the system and the remote control end, which is convenient for remote monitoring and management. The external data cable 18 is used to connect the system equipment and the external equipment, to transmit control and monitoring signals. The air pipe electric control valve 8 is used to control the opening and closing of the water inlet negative pressure air pipe 9, to control the air pressure in the interface valve 10. The water inlet negative pressure air pipe 9 is used as an air passage between the interface valve 10 and the vacuum water storage tank 1. The interface valve 10 is used as a rubber tube type clamp valve, to control the sewage from the water suction pipe 7 into the vacuum water storage tank 1, to prevent water backflow. The water inlet pipe 29 is used to transport sewage from the water collecting pit well 6 to the vacuum water storage tank 1.

[0034] Example three; As Figure 1As shown, according to the maintenance-free tunnel vacuum drainage system of the embodiment of the application, the interface valve 10 and the sump well 6 are connected with the water pumping pipe 7, the sump well 6 and the intelligent master control 4 are connected with the seventh control cable 39, the upper end of the sump well 6 is provided with the liquid level sensor B30, the intelligent master control 4 and the cam drainage pump group 3 are connected with the eighth control cable 40, the cam drainage pump group 3 and the vacuum water storage tank 1 are connected with the proximal drainage pipe 24, the cam drainage pump group 3 and the vacuum water storage tank 1 are connected with the pressure balance pipe 11, the bottom of the vacuum water storage tank 1 is provided with the first maintenance valve 31 and the second maintenance valve 32, the first maintenance valve 31, the second maintenance valve 32 and the cam drainage pump group 3 are connected, one end of the cam drainage pump group 3 is connected with the drainage electric control valve 12, the drainage electric control valve 12 and the outdoor functional well 5 are connected with the distal drainage pipe 25, the drainage electric control valve 12 and the intelligent master control 4 are connected with the sixth control cable 38, one side of the distal drainage pipe 25 is provided with the liquid level sensor A13, the liquid level sensor A13 and the intelligent master control 4 are connected with the fifth control cable 37, the inside of the outdoor functional well 5 is provided with the air vent electric control valve 21 and the check valve 23, the upper end of the air vent electric control valve 21 is provided with the waterproof cap 19, the air vent electric control valve 21 and the intelligent master control 4 are connected with the fourth control cable 36, the upper end of the check valve 23 is provided with the terminal drainage pipe 22, the upper end of the outdoor functional well 5 is provided with the air vent pipe 20.

[0035] In this embodiment, the sump well 6 is used to collect sewage in the tunnel, which is the initial collection point of sewage into the drainage system, the suction pipe 7 is used to extract and transport the sewage in the sump to the vacuum water storage tank 1, the liquid level sensor B30 is used to monitor the liquid level in the sump to provide a signal for the system to start pumping, the pressure balance pipe 11 is used to balance the pressure in the vacuum water storage tank 1 and the inlet end of the near-cam drainage pump set 3, to ensure stable operation of the system, the drainage electric control valve 12 is used to control the opening and closing of sewage from the cam drainage pump set to the far-end drainage pipe 25, to adjust the drainage process, the liquid level sensor A13 is used to monitor the liquid level height in the far-end drainage pipe 25 to provide a liquid level signal for the intelligent master control 4 to control the reverse drainage timing of the cam drainage pump set 3, the cam drainage pump set 3 is an elastomer cam rotor pump set that lifts and discharges sewage in the vacuum water storage tank 1 to the far-end drainage pipe 25 network to provide drainage power. At the same time, after the drainage is completed, it will reverse the residual sewage in the far-end drainage pipe 25 into the vacuum water storage tank 1, the elastomer cam rotor pump has the advantage of stable flow, compared with centrifugal pumps, it has good flow stability and can accurately control the flow output, which is obviously advantageous in high flow stability requirements. Strong self-priming ability, no need to fill the pump, can suck the medium in a short time, reduce the risk of idling, the self-priming height can reach four to eight meters or even higher, and short-time dry running is also allowed. Higher delivery pressure, compared with metal cam pumps, can provide higher delivery pressure, which can cover part of the pressure range of the rotor type thick oil pump, the near-end drainage pipe 24 is used to connect the vacuum water storage tank 1 and the cam drainage pump set to transport sewage, the far-end drainage pipe 25 transports the sewage discharged by the cam drainage pump set 3 to the outdoor functional well 5, the waterproof cap 19 is installed at the top end of the air pipe 20 to prevent debris, rainwater, etc. from entering the air pipe 20 to protect the air function. The air pipe 20 can balance the atmospheric pressure of the system and the outside world to ensure normal operation of the system. The air control valve 21 controls the on-off of the air pipe 20. The terminal drainage pipe 22 is used to discharge the sewage to the outdoor functional well 5. The check valve 23 prevents backflow of sewage to ensure one-way flow of drainage. The outdoor functional well 5 is used to install and maintain part of the system equipment, provides operation space, and protects the equipment from the influence of the external environment.

[0036] In order to facilitate the understanding of the above technical solutions of the present application, the working principle or operation mode of the present application in the actual process will be described in detail.

[0037] In practical application, through the water collection pit 6 as the starting point of sewage collection, convergence tunnel sewage. Liquid level sensor B30 real-time monitoring of the liquid level in the water collection pit 6, when the liquid level reaches the high set value, suction signal through the seventh control cable 39 signal transmission to the intelligent main control 4, open signal transmission to the gas pipe electric valve 8 through the ninth control cable 41, inlet negative pressure air pipe 9 open, interface valve 10 its internal air under the action of negative pressure is extracted to the vacuum storage tank 1(1) and open, water suction pipe 7 and inlet pipe 29 communication, sewage in the water collection pit 6 is sucked to the vacuum storage tank 1, when the liquid level in the water collection pit 6 is reduced to the low set value, liquid level sensor B30 will signal transmission to the intelligent main control 4 through the seventh control cable 39, close signal transmission to the gas pipe electric valve 8 through the ninth control cable 41, inlet negative pressure air pipe 9 close, interface valve 10 reset under the action of atmospheric pressure and its internal spring tension closed, water suction pipe 7 and inlet pipe 29 is disconnected, then the water collection suction work is completed, and in the claw type vacuum pump set 2 for the whole system provides the initial 65kPa negative pressure, according to the real-time working condition, each component carries on the relevant action. Pressure sensor 15 monitoring the pressure change in the vacuum storage tank 1, when its pressure is lower than 55kPa negative pressure, low pressure signal transmission to the intelligent main control 4 through the third control cable 35, because the vacuum electric valve 27 is in the open state for a long time, only in the maintenance or specific circumstances, the intelligent main control 4 will send signal control open and close through the tenth control cable 42, so the intelligent main control 4 directly transmits the start signal to the claw type vacuum pump set 2 through the first control cable 33, the air is discharged to the outside through the vacuum pipe 28, vacuum electric valve 27, claw type vacuum pump set 2, vacuum exhaust pipe 26. When the pressure in the vacuum storage tank 1 is reduced to 65kPa negative pressure, the pressure sensor 15 will signal transmission to the intelligent main control 4 through the third control cable 35, stop signal transmission to the claw type vacuum pump set 2 from the intelligent main control 4 through the first control cable 33, the unit is closed, then the vacuum extraction is completed, liquid level sensor C14 monitoring the water level in the vacuum storage tank 1, when the water level reaches the set high value, the need for drainage signal transmission to the intelligent main control 4 through the second control cable 34, open valve signal transmission to the drainage electric valve 12 through the sixth control cable 38 to make it open, then the drainage signal transmission to the cam drainage pump set 3 through the eighth control cable 40 to make it run, sewage through the near end drainage pipe 24, always open first maintenance valve 31 and second maintenance valve 32, cam drainage pump set 3, drainage electric valve 12, far end drainage pipe 25, terminal drainage pipe 22, check valve 23, drain to the outdoor function well 5.When the water level drops to the set low value, the liquid level sensor C14 will need to stop the drainage signal transmission to the intelligent master control 4 through the second control cable 34, the shutdown signal is transmitted to the cam drainage pump group 3 through the eighth control cable 40 to make it close, this time the cam drainage is over, after the cam drainage, there are still some sewage in the remote drain pipe 25 and the terminal drain pipe 22 which cannot be drained to the ground, therefore, the intelligent master control 4 sends the development signal to the air valve 21 through the fourth control cable 36 to make it open, at the same time, the power-on signal is transmitted to the liquid level sensor A13 through the fifth control cable 37 to make it start working, and the start signal is transmitted to the cam drainage pump group 3 through the eighth control cable 40 to make it reverse operation, the remaining sewage is returned to the vacuum water storage tank 1 through the drainage electric control valve 12, the cam drainage pump group 3, the near-end drain pipe 24, the normally open first maintenance valve 31 and the second maintenance valve 32, and the air flows into the terminal drain pipe 22 and the remote drain pipe 25 through the waterproof cap 19, the air valve 21 and the air pipe 20 under the action of air pressure, at this moment, the liquid level sensor A13 monitors the liquid level in the remote drain pipe 25 in real time, when it drops to the set value, the feedback signal is transmitted to the intelligent master control 4 through the fifth control cable 37, the stop signal is transmitted to the cam drainage pump group 3 through the eighth control cable 40 to make it stop and close, and the valve closing signal is transmitted to the drainage electric control valve 12 through the sixth control cable 38 to make it close. At the same time, the intelligent master control 4 sends the closing signal to the liquid level sensor A13 and the air valve 21 through the fifth control cable 37 and the fourth control cable 36 to make them close. This time the cam drainage is over.

[0038] The above is only the preferred embodiment of the present application, and is not used to limit the present application, any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A maintenance-free vacuum drainage system for tunnels, comprising a vacuum water storage tank (1), a claw-type vacuum pump assembly (2), a cam-type drainage pump assembly (3), an intelligent main control unit (4), an outdoor functional well (5), and a sump well (6), characterized in that, The vacuum water storage tank (1) and the claw vacuum pump group (2) are connected together. The claw vacuum pump group (2) and the intelligent main control (4) are connected together. One end of the vacuum water storage tank (1) is connected to the interface valve (10). The other end of the interface valve (10) is connected to the water collection pit well (6). The water collection pit well (6) and the intelligent main control (4) are connected together. The vacuum water storage tank (1) and the cam drainage pump group (3) are connected together. The cam drainage pump group (3) and the intelligent main control (4) are connected together. The outdoor functional well (5) and the cam drainage pump group (3) are connected together.

2. The maintenance-free vacuum drainage system for tunnels according to claim 1, characterized in that, A vacuum control valve (27) is provided between the vacuum water tank (1) and the claw vacuum pump group (2). The vacuum control valve (27) is connected to the vacuum water tank (1) and the claw vacuum pump group (2) through a vacuum tube (28). A vacuum exhaust pipe (26) is provided at one end of the claw vacuum pump group (2). A liquid level sensor C (14), a pressure sensor (15), and a pressure gauge (16) are provided at one end of the vacuum water tank (1).

3. The maintenance-free vacuum drainage system for tunnels according to claim 2, characterized in that, A first control cable (33) is connected between the claw vacuum pump assembly (2) and the intelligent main controller (4), and a tenth control cable (42) is connected between the vacuum electric control valve (27) and the intelligent main controller (4).

4. The maintenance-free vacuum drainage system for tunnels according to claim 3, characterized in that, A second control cable (34) and a third control cable (35) are connected between the vacuum water tank (1) and the intelligent main controller (4). One end of the intelligent main controller (4) is connected to a wireless module (17), and the other end of the intelligent main controller (4) is connected to an external data cable (18).

5. A maintenance-free vacuum drainage system for tunnels according to claim 4, characterized in that, A gas pipe electric control valve (8) is connected between the vacuum water storage tank (1) and the interface valve (10). A ninth control cable (41) is connected between the gas pipe electric control valve (8) and the intelligent main controller (4). A water inlet negative pressure gas pipe (9) is connected between the gas pipe electric control valve (8) and the vacuum water storage tank (1). A water inlet pipe (29) is connected between the vacuum water storage tank (1) and the interface valve (10).

6. A maintenance-free vacuum drainage system for tunnels according to claim 5, characterized in that, A pumping pipe (7) is connected between the interface valve (10) and the sump well (6), and a seventh control cable (39) is connected between the sump well (6) and the intelligent main controller (4). A liquid level sensor B (30) is provided at the upper end of the sump well (6).

7. A maintenance-free vacuum drainage system for tunnels according to claim 6, characterized in that, An eighth control cable (40) is connected between the intelligent main controller (4) and the cam drainage pump group (3). A near-end drain pipe (24) is connected between the cam drainage pump group (3) and the vacuum water storage tank (1). A pressure balance pipe (11) is connected between the cam drainage pump group (3) and the vacuum water storage tank (1). A first maintenance valve (31) and a second maintenance valve (32) are provided at the bottom of the vacuum water storage tank (1). The first maintenance valve (31), the second maintenance valve (32), and the cam drainage pump are connected together. The group (3) is connected, and one end of the cam drainage pump group (3) is connected to a drainage electric control valve (12). A remote drainage pipe (25) is connected between the drainage electric control valve (12) and the outdoor functional well (5). A sixth control cable (38) is connected between the drainage electric control valve (12) and the intelligent main control (4). A liquid level sensor A (13) is provided on one side of the remote drainage pipe (25). A fifth control cable (37) is connected between the liquid level sensor A (13) and the intelligent main control (4).

8. A maintenance-free vacuum drainage system for tunnels according to claim 7, characterized in that, The outdoor functional well (5) is equipped with a ventilation solenoid valve (21) and a check valve (23). The upper end of the ventilation solenoid valve (21) is equipped with a waterproof cap (19). A fourth control cable (36) is connected between the ventilation solenoid valve (21) and the intelligent main controller (4). The upper end of the check valve (23) is equipped with a terminal drain pipe (22). The upper end of the outdoor functional well (5) is equipped with a ventilation pipe (20).

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