190 results about "Controlled drainage" patented technology

The invention discloses a pressure-controlled drainage gas production method and system for a coal-bed gas well. The pressure-controlled drainage gas production method comprises the steps that drainage is conducted through the first daily drainage amount, wherein the first daily drainage amount meets the eliminating demand for production interference objects in a coal bed; and a pressure-supplementing medium is injected while drainage is conducted, and the downhole flow pressure daily drop amount is maintained as a first differential pressure value so as to avoid retracting and closing of pores and cracks in the coal bed. According to the pressure-controlled drainage gas production method for the coal-bed gas well, the drainage speed at the drainage state can be conveniently determined, the eliminating demands for drilling and completion fluids, pulverized coal and slack coal in the coal bed can be met, and meanwhile, retracting and closing of the pores and the cracks in the coal bed can also be avoided; and compared with the prior art, the pressure-controlled drainage gas production method is simple in process, the production efficiency of the coal-bed gas well can be greatly improved, and quite high practical value and popularization value are achieved.

The invention discloses a control roof drainage method for multiple coal faces in a monocline structure area, which combines the characteristic that the water level of a monocline structure is gradually increased along with the burial depth, and adopts a layered and graded control drainage strategy by utilizing the burial depth difference of the working faces, and comprises the following steps of: firstly, controlling the drainage water level at a preset water head threshold value; ensuring that the water level is lower than the elevation of the bottom plate of the first mined shallow working surface, and meeting the safe mining condition of the shallow working surface; and after mining of the shallow working face is completed, the drainage amount of the drill hole is gradually increased, the drainage level is reduced, the mining requirement of the next deep working face is met, and sequential mining of multiple working faces from shallow to deep is achieved in the same manner. According to the method, the drainage drill holes are formed in the low-position roadway at a time, roof water disaster prevention and control of all the working faces are achieved in order in a controlled drainage mode, the dynamic water inflow of the working faces can be reduced, and remarkable economic, safe and environmental benefits are achieved.

The embodiment of the invention provides a drainage recovery control method and system for a multi-source heat supply network. The method comprises the steps that data acquisition equipment is installed on all drainage pipelines before entering a drainage tank of the heat supply network; acquiring temperature parameters, flow parameters and conductivity parameters of each path of hydrophobic water in real time through the data acquisition equipment; and based on the temperature parameter, the flow parameter and the conductivity parameter, comprehensive state judgment of hydrophobic recovery treatment is carried out, and based on a judgment result, dynamic pollution discharge control is carried out. According to the embodiment of the invention, the blow-down valve is opened in a targeted manner through real-time acquisition and layered judgment, so that the mixed hydrophobic parameters are stabilized in a threshold range, and the problem that traditional static control cannot adapt to multi-source parameter differences is solved; and on the basis that pollution discharge is triggered only when parameters exceed the standard, qualified drained water is prevented from being discharged by mistake, and recoverable water resources and waste heat resources are reserved to the maximum extent.

The invention relates to the technical field of agricultural water conservancy control, in particular to a high-standard farmland intelligent irrigation and drainage pump gate cooperative remote control method and system, and the method comprises the steps: generating a cooperative control instruction which restrains the power of a water pump and the opening and closing of a gate at the same time based on farmland water level information; establishing a conflict relationship between the response delay time of the water pump and the action delay time of the gate, and disassembling the cooperative control instruction into control sub-instructions for the water pump and the gate; when the soil under-saturation signal is continuously detected, the distribution adjustment control sub-instruction adjusts the output power of a water pump and controls the opening degree of an irrigation gate; when the water level overrun signal is continuously detected, the control sub-instruction is adjusted to control the opening degree of the drainage gate, and the output power of the water pump is reversely adjusted based on a backwater shock wave model triggered by the gate opening degree; the farmland water level information is detected in real time, and a cooperative control instruction is reconstructed. According to the invention, the problem of water level oscillation caused by misalignment of cooperative control of the water pump and the gate due to response time delay difference is effectively solved.

The invention discloses a drainage pipe network multi-modal data analysis method for urban inland inundation prevention and control, and belongs to the technical field of urban inland inundation prevention and control. According to the method, satellite remote sensing surface ponding images, drainage pipe network liquid levels, regional meteorology, public ponding crowdsourcing information and terrain elevation and pipe network attribute data are collected and integrated into a multi-dimensional original data set; after cleaning and standardization processing, mining waterlogging associated features by using an adaptation algorithm, and establishing a coupling relation model; waterlogging risk reasoning is carried out based on the model, and graded early warning information and pump station scheduling, pipe network dredging and emergency dredging path schemes are generated; and performing visual analysis on a result, and dynamically optimizing a model and a scheme according to real-time updated data. According to the scheme, waterlogging influence factors are comprehensively covered, the accuracy of risk assessment and prevention and control decision is improved, dynamic changes of waterlogging are adapted, and the initiative and systematicness of urban waterlogging prevention and control are enhanced.

The utility model discloses a kind of gas pipeline water stop, it is related to gas pipeline conveying equipment technical field, comprising: water stop body and gas-liquid separation mechanism and free-floating ball type trap, gas-liquid separation mechanism is set in water stop body, to form in water stop body top air passage and bottom drain passage, air passage is communicated with gas outlet pipe, drain pipe is communicated with drain passage;Free-floating ball type trap is installed in the bottom of drain pipe, to form liquid storage cavity in drain pipe, after the water of liquid storage cavity exceeds design height, drive free-floating ball type trap's float ball to rise and then open free-floating ball type trap and discharge water exceeding design height from the drain port of free-floating ball type trap, without manual intervention, can automatically control drainage according to the change of water level in liquid storage cavity, improve the timeliness and efficiency of drainage, ensure that ponding in pipeline system does not too much affect operation.

The application discloses a drainage system, a washing machine and a drainage control method thereof. The drainage pipeline is composed of an inlet pipeline, a first branch pipeline, a second branch pipeline and an outlet pipeline. One end of the inlet pipeline is connected with a washing water outlet, and the other end is bifurcated to be connected with the first branch pipeline and the second branch pipeline. The first branch pipeline and the second branch pipeline are connected with the outlet pipeline at the outlet end. A drainage pump is arranged in the first branch pipeline, and a filter screen is arranged at the inlet of the first branch pipeline. When washing water is drained, the drainage pump is started, the washing water is filtered through the filter screen and then enters the first branch pipeline, and then flows out to the outlet end where the first branch pipeline and the second branch pipeline are connected. The filtered particles are deposited into the second branch pipeline based on gravity, and then are deposited into the outlet end where the second branch pipeline and the first branch pipeline are connected based on gravity. The particles are flushed out of the drainage pipeline together with the water flow drained through the first branch pipeline, so that the damage of the particles to the drainage pump is avoided.

This invention discloses a controlled drainage ecological regulation method for synergistic irrigation and drainage to reduce salinity and alkalinity, belonging to the field of soil remediation technology. The method includes: a soaking and dissolving stage, where, with the drainage outlet closed, low-flow irrigation is performed at the farthest point from the drainage ditch, allowing a large amount of irrigation water to enter the small pores of the soil profile and soak and dissolve salts; a diffusion and dispersion stage, where the drainage outlet is raised, and with the outlet height lower than the field surface, large-flow irrigation is performed evenly, filling all pores of the soil profile with irrigation water and enhancing the diffusion and dispersion of salts; a convection desalination stage, where the drainage outlet is opened, and with the outlet depth level with the drainage ditch depth, saline water is evenly discharged from the soil; and a water-saving and emission-reduction stage, where the drainage outlet depth is lower than the crop root zone, breaking the connectivity of small pores and preventing soil salts from moving upwards during crop growth. This synergistic irrigation and drainage achieves the three major goals of salt control, water conservation, and emission reduction.

The application discloses a kind of negative pressure automatic drainage device, including with the drainage pipe of the blowout preventer's discharge port connection;And the drainage tee pipe is communicated with drainage pipe, drainage tee pipe lower part is provided with control component, control component is used to control the communication state of drainage pipe;Control component is communicated with blowout preventer box by high pressure pipe.The automatic drainage device of the application sets the control component of pressure control in the lower part of drainage tee pipe, the position of solid rubber ball of vibrating screen is controlled by nylon piston by the change of pressure to control the switch of drainage pipe, response timely, realizes automatic control, and ensure that gas cannot be leaked from drainage port.

The invention relates to the technical field of water purification systems, in particular to a multifunctional commercial drinking water supply system which comprises a front filtering device and a drainage device, and usable water generated by the front filtering device is input into a temperature control drainage device; the drainage device comprises a hot water tank, a cold tank and a UV sterilizer which are arranged in parallel; the output end of the hot water tank is a hot water outlet; a preheater is arranged on the first branch pipeline, and a first output end of the preheater directly discharges water to form a warm water outlet; the output end of the cold tank is connected with the UV sterilizer, and the output end of the UV sterilizer is a cold water outlet. The water quality is improved through multi-stage filtration, multiple sterilization is realized through front multi-stage filtration, rear activated carbon filtration and a rear heating sterilization or UV sterilizer, and the safety of drinking water is ensured. Through the combination of the cold tank and the medium unit and the combination of the hot water tank and the preheater, ice water, normal-temperature water and hot water can be supplied, and different people can supply drinking water at different temperatures.

The utility model discloses a magnetic type drainage pipeline installation auxiliary device capable of achieving rapid butt joint and positioning. The magnetic type drainage pipeline installation auxiliary device is provided with an auxiliary support used for positioning and supporting. Comprising a positioning assembly which is installed on the right side of the lower surface of the auxiliary support, the left side of the inner surface of the auxiliary support is rotationally connected with a threaded rod, the outer surface of the threaded rod is rotationally connected with a conveying belt, meanwhile, the outer surface of the threaded rod is in threaded connection with a moving part, and the moving part is provided with a limiting conveying mechanism. According to the magnetic type drainage pipeline installation auxiliary device capable of achieving rapid butt joint positioning, the auxiliary support facilitating positioning and supporting is arranged, a second drainage pipe which is already positioned and assembled is limited and clamped, a first drainage pipe is clamped in cooperation with a movable clamping jaw, and the first drainage pipe is conveyed after being clamped; and an electromagnet in the positioning claw is matched to be powered on, and magnetic attraction positioning work is carried out on the position of a magnetic attraction piece in the first water drainage pipe.

This application discloses an air conditioner, belonging to the field of air handling technology. The air conditioner includes a heat exchanger, a wetted membrane, a water supply system, a drip tray, a drainage system, and a controller. The water supply system supplies water to the wetted membrane and includes a water supply solenoid valve for opening or closing the system. The drip tray is located below the heat exchanger and the wetted membrane, with the bottom of the wetted membrane higher than the bottom of the heat exchanger. The drainage system includes a drain pump and a water level detection module. The controller is configured to: in dehumidification mode, control the drain pump to drain water from the drip tray; when the water level in the drip tray reaches the minimum water level detected by the water level detection module, output an alarm signal indicating a drainage system fault; in humidification mode, control the water supply solenoid valve to open; when the water level in the drip tray reaches the level detected by the water level detection module (higher than the bottom of the wetted membrane), control the water supply solenoid valve to close, thereby shutting off the water supply system's supply to the wetted membrane. This air conditioner can reduce system complexity and cost.

The invention discloses a drainage control method and device of a fuel cell and a nonvolatile storage medium. The method comprises the following steps: obtaining a current control combination of a drain valve in the fuel cell, the current control combination comprising an opening time length and a closing time length; under the condition that the drain valve is in the open state, based on the actual hydrogen pressure value in the fuel cell, adjusting the total duration corresponding to the current control combination to obtain a first total duration; under the condition that the opening state of the drainage valve continues to be opened for the duration, the drainage valve is closed; under the condition that the drain valve is in a closed state, adjusting the first total time length based on the current of a hydrogen circulating pump in the fuel cell to obtain a second total time length; and determining the next control combination of the drain valve according to the second total duration. According to the invention, the technical problem that too high or too low accumulated water in the fuel cell has adverse effects on the operation of the fuel cell is solved.

The utility model belongs to the technical field of sewage discharge, and discloses a plant road rainwater discharge monitoring device which comprises a plurality of sewer wells distributed on the road surface of a plant road, a rainwater pipeline arranged underground, a drainage pipe communicated with a river, a water storage pond, a controller and a PH online detector. The rainwater pipeline is communicated with the water storage pond, a water outlet is formed in the lower portion of one side of the water storage pond and connected with a water drainage pipe, an electric valve used for controlling the water drainage amount is arranged at the position of the water outlet, a detection probe of the PH online detector is arranged at the bottom of the inner side of the water storage pond, and the PH online detector and the electric valve are both electrically connected with the controller. Rainwater in the water storage pond is monitored in real time through the PH online detector, the PH online detector and the electric valve are matched to control opening and closing of the electric valve, the safety of rainwater drainage can be effectively guaranteed through linkage of the PH online detector and the electric valve, the ecological environment of a river is prevented from being affected, and the environmental protection risk is reduced.

The invention discloses a multi-stage high-pressure mining energy-saving pump, and relates to the technical field of mining pumps. Comprising a pump body part, a water inlet control part is installed on the pump body part, and the water inlet control part is used for detecting water inlet interruption; a drainage control piece is mounted on the pump body piece; the drainage control piece is used for controlling drainage; a branch flow control piece is mounted on the drainage control piece; a full-open control piece is mounted on the drainage control piece; the water inlet control part can detect normal water inlet, assists accurate control by utilizing water inlet pressure, and can automatically control water pumping evacuation or sealing of a water drainage pipe after water pumping is completed in cooperation with the water drainage control part. The problem that an existing multi-stage high-pressure mining energy-saving pump is not convenient for closed protection after automatic detection and emptying is solved.

The utility model discloses an integrated water hammer effect pump structure applied to horizontal water turbine belongs to the field of hydroelectricity. Including: for providing water source's water hammer effect water supply groove, for transmitting water source's power water pipe, for pneumatic control drainage, realize the pneumatic drainage module of water hammer effect, for storing water source and can be with water source hoisting to horizontal water turbine's air energy storage tank, for controlling air energy storage tank's water intake's water hoisting valve, power water pipe one end with water hammer effect water supply groove intercommunication, the other end is connected through water hoisting valve with the bottom of air energy storage tank, pneumatic drainage module installs on power water pipe. Can utilize water hammer effect with horizontal water turbine utilizes the water source of complete water source hoisting to horizontal water turbine and utilizes, to can realize the recycling of water resources, improve the stability of power generation.

The invention relates to the technical field of clothes processing equipment, and provides a clothes dryer and a control method and device thereof and a storage medium, and the control method comprises the steps: responding to a first preset condition, and controlling a drainage pump to execute a timing drainage mode; in response to a second preset condition, controlling the drainage pump to execute a floater-triggered drainage mode; wherein during the execution period of the timed drainage mode, the drainage pump is controlled to stop the floater to trigger the execution of the drainage mode. When the drainage pump executes timing drainage, the drainage pump is controlled to suspend judgment and execution of the floater triggering drainage mode, frequent starting of the drainage pump and overflow caused by excessive continuous drainage due to the fact that the floater is triggered to close drainage in the timing drainage period are avoided, and the service life of the clothes dryer is prolonged.

The present application relates to the technical field of water quality monitoring for water supply systems, and provides a water quality monitoring method for a water supply system, a water supply system, and a refrigeration apparatus. The water quality monitoring method for a water supply system includes: controlling to convey water to a water outlet pipe of the water supply system; obtaining a water quality parameter in the water outlet pipe; judging whether the water quality parameter meets a standard; if the water quality parameter meets the standard, ending the monitoring; if the water quality parameter does not meet the standard, proceeding to a next operation; controlling to drain the water in the water supply system; and repeating the above obtaining operation, judging operation, and draining operation, until the water quality parameter meets the standard. Through this method, the water quality parameter in the water outlet pipe may be monitored in real time, and it is controlled to drain the water in the water supply system when the water quality parameter exceeds the standard, thereby avoiding the breeding and deposition of organic matter. Moreover, this method may avoid drainage and flushing of the water supply system after a long period of inactivity, reduce operational difficulties and improve user convenience.

The embodiment of the application provides a clothes dryer, comprising: a shell; a drum arranged in the shell; a water storage box, comprising a base water box; a drainage pump arranged in the base water box; a float switch fixed beside the drainage pump, comprising a floating state of a float ball and a falling state of the float ball; a controller connected with a timer, the drainage pump and the float switch respectively, the controller being configured to perform the following steps: when it is detected that the float switch is in the floating state of the float ball, the drainage pump is controlled to work and the timer is started; when it is detected that the float switch is switched from the floating state of the float ball to the falling state of the float ball, the timing duration of the timer and the drainage amount of the drainage pump are acquired; based on the drainage amount and the timing duration, the drainage rate of the drainage pump is calculated; based on the drainage rate and the to-be-drained amount, the residual drainage duration is determined; and the drainage pump is controlled to stop working after continuing to work for the residual drainage duration. The application can guarantee the drainage effect while eliminating the drainage noise.

The invention belongs to the technical field of cooling water pipe anti-freezing, and particularly discloses a HyCROF furnace cooling wall cooling water pipe anti-freezing method which comprises the following steps that a main valve of a cooling water pipe is closed, pressure is released to a target pressure range, after natural drainage is conducted in sequence, a PLC controls compressed air to purge a main pipeline of the cooling water pipe, and then the main pipeline of the cooling water pipe is closed; the branch drain valves with qualified humidity are closed according to the humidity of the outlets of the drain valves before secondary purging, then the furnace bottom and the lower area of the furnace body are purged, the PLC controls compressed air to accurately purge the tail end during third purging, and the PLC judges whether purging is qualified or not according to the humidity of the outlets of the drain valves after purging; the sequence, pressure and time of drainage and purging are accurately controlled through a PLC program, the randomness of manual operation is reduced, it is ensured that the purging effect is highly uniform and reliable, and the working efficiency and consistency are improved; the problems that a traditional manual purging method is uneven in purging effect and low in operation efficiency are solved.

The utility model discloses a drainage bag capable of controlling drainage volume, which comprises an outer frame, a first vertical guide rail, a second vertical guide rail, a telescopic drainage bag and an adjusting component, one end of the adjusting component is in sliding connection with the first vertical guide rail, and the other end of the adjusting component is in sliding connection with the second vertical guide rail. The first vertical guide rail and the second vertical guide rail are each provided with a plurality of adjusting holes arranged at intervals in the vertical direction, the adjusting holes are matched with the adjusting assembly in a clamped mode, the upper end of the telescopic drainage bag is connected with a drainage tube, and the drainage tube is rotationally connected with the outer frame. The lower end of the telescopic drainage bag is fixedly connected with the adjusting assembly; according to the utility model, the drainage amount can be adjusted without an electronic device, the possibility that the capacity cannot be adjusted due to failure of the electronic device is avoided, the adjusting mode is simple and quick, the manufacturing cost is low, and the device is suitable for clinical popularization and application.

The application discloses a construction control method of anti-floating anchor rod based on distributed displacement monitoring, and the control method comprises arrangement of an anti-floating anchor rod system, distributed displacement monitoring, visual analysis, intelligent decision of electro-osmosis and control of electro-osmosis; the electro-osmosis equipment is integrated on the anti-floating anchor rod and a drainage pipe, so that the uniformity of an electric field distribution, the efficiency of drainage and the ability of resisting groundwater buoyancy are improved; linkage of the anti-floating anchor rod system based on the electro-osmosis principle and distributed displacement monitoring data realizes dynamic regulation and control and closed-loop control; according to the floating or subsidence state of a stratum, the drainage rate and range are accurately controlled, so that the anti-floating anchor rod system adapts to the change of temporary load of an underground engineering structure during construction and the influence of rainfall on the groundwater level, and the possibility of stratum compression settlement caused by excessive drainage is avoided.

This invention discloses a drainage control method, system, device, and storage medium for a dehumidifier. The method includes: acquiring first and second water level information of a water tray; acquiring the cumulative running time and cumulative start-stop count of a water pump module; generating a dynamic compensation coefficient based on the cumulative running time and cumulative start-stop count; and controlling the water pump module to drain water from the water tray based on the first water level information, the second water level information, and the dynamic compensation coefficient, so that the real-time water level of the water tray is at a preset safe water level. Drainage is performed after dual liquid level detection by the first and second water level detection units, which can reduce the frequency of water pump start-stop and improve pump life. The adaptive attenuation compensation of the dynamic compensation coefficient can reduce insufficient drainage and overflow caused by the decrease in drainage capacity after long-term use of the pump.

The present disclosure provides an intelligent low-carbon treatment and reuse system for stormwater and wastewater, including: a bioretention module for collecting stormwater and treating it to obtain treated stormwater; a numerically controlled drainage module for collecting oxidation-reduction potential data and pH data of the treated stormwater and transmitting them to a control module as environmental data, and discharging treated stormwater for a preset time period based on a first control signal sent by the control module; a stormwater and wastewater collection module for storing the discharged treated stormwater and maintaining water storage volume within a preset range; an irrigation module; and the control module. Stable, efficient and low-carbon treatment and reuse of stormwater and wastewater are achieved.

This application provides an ecological drainage gate for water control in modern farmland, comprising: a PE gate and its outer frame for controlling drainage volume; a concrete outer frame for fixing the gate, including a base plate, a back plate, and two fan-shaped side plates; a short outlet pipe at a certain angle installed on the back plate for reliable installation; a filter screen installed on the gate and fixed to the gate structure for filtering floating impurities in the water; and a mudguard installed at the front of the base plate to prevent mud from being carried into the ditch. The advantages of this application are: the use of a filter screen to intercept floating impurities in the water, preventing them from flowing into the ditch; the installation of a mudguard to intercept silt; the ability to open the PE drainage gate to an ideal height with precise control of drainage volume; and the pre-installed inclined outlet pipe connected to the drainage pipe with silicone sealant, eliminating the problem of leakage at the joint.

The utility model relates to the field of kitchens, in particular to a large-discharge-capacity residue filtering water tank which comprises a water tank body, a drainage groove is formed in the front end of the inner wall of the bottom of the water tank body, a connecting groove is formed in the rear end of the center of the drainage groove, a drainage opening is formed in the bottom of the connecting groove, and a drainer is installed at the bottom of the drainage opening. The drainer is composed of a shell, a second residue separation basket, a switch rubber cover, a control rod and a rotating arm, the second residue separation basket is arranged at the top end in the shell, the switch rubber cover is arranged at the bottom of the second residue separation basket, and the control rod is connected to the bottoms of the second residue separation basket and the switch rubber cover; a drainage switch is arranged at the top of the side wall of the water tank body, the bottom of the drainage switch is connected with a drainage controller through a control line, and a control arm is arranged in the drainage controller. Therefore, the phenomenon that the water flow becomes small due to the fact that the residue separation basket is blocked by the kitchen garbage can be effectively filtered.

The utility model relates to the technical field of drainage pipes, in particular to a push-pull type anti-blocking inner container drainage pipe structure which improves the installation stability of a pipeline at a drainage port through a fixing structure, facilitates opening and closing of the drainage pipeline through a connecting structure and improves the practicability of the device. Comprising a fixing structure and a connecting structure, and the connecting structure is installed on the fixing structure.

The invention discloses an air conditioner control method and device, a storage medium and electronic equipment, and relates to the technical field of air conditioners, an air conditioner comprises an evaporator and a drainage pump, and the method comprises the steps that the estimated condensation state of the evaporator is determined according to air conditioner operation parameter values; correcting the initial output power of the drainage pump according to the pre-estimated condensation state to obtain corrected output power; and controlling the drainage pump to operate at the corrected output power. The output power of the draining pump can be reasonably controlled, and energy consumption is reduced.

The utility model relates to the technical field of manure fermentation treatment, in particular to an aerobic fermentation manure treatment device. The device comprises a solid excrement bin and a sewage bin which are communicated with each other and a filtering structure arranged between the solid excrement bin and the sewage bin, a stirring device and a temperature and humidity control device are arranged on the solid excrement bin, and the temperature and humidity control device comprises a temperature and humidity monitoring unit, an electric heating structure and a spraying system. The electric heating structure comprises an electric heating plate arranged on the inner side of the solid excrement bin, a first anti-corrosion plate is arranged on the inner side of the electric heating plate, the electric heating plate is clamped and fixed between the first anti-corrosion plate and the solid excrement bin, a liquid level monitoring unit is arranged in the sewage bin, the sewage bin is communicated with drainage equipment, and the drainage equipment is communicated with the sewage bin. And the liquid level monitoring unit is used for controlling the drainage equipment to discharge sewage when a specified liquid level is monitored. The fermentation effect is improved through solid-liquid separation, temperature and humidity control and stirring, and the influence of outdoor accumulation on the environment and the fermentation efficiency is avoided.

The utility model provides a mine underground automatic drainage control device and belongs to the field of mine underground drainage, the mine underground automatic drainage control device is formed by electrically connecting a control assembly and a drainage assembly, and a control switch in the control assembly detects the water level through a floating device. The control rod is connected with the electric communication contact device, the control rod is connected with the metal sheet in the electric communication contact device, the control circuit is connected with the electric communication contact device, the control circuit is connected with the control rod, the control rod is combined with the electric communication contact device, the drainage device is automatically started and stopped, automatic control over underground drainage is achieved, manual operation is greatly reduced, and drainage efficiency and safety are improved. The design of the control switch ensures that the drainage assembly can be accurately and reliably started and stopped when the water level changes, and unsmooth drainage or water disaster accidents caused by equipment faults are reduced.