Movable bidirectional flow channel irrigation and drainage pump station and implementation method thereof

Abstract

The invention relates to a movable bidirectional flow channel irrigation drainage pumping station, which comprises a pump room, a controller, a sewage self-priming pump, a vacuum pump, a water source pipeline, a water delivery pipeline, an electric valve and a farmland pipeline, the inner bottom wall of the pump room is connected with the sewage self-priming pump, the controller is connected with the sewage self-priming pump, the sewage self-priming pump is connected with the vacuum pump, and the vacuum pump is connected with the water source pipeline. The input end of the sewage self-priming pump is connected with a water source pipeline, a first transmission pipeline is arranged on the far portion of the water source pipeline, a second transmission pipeline and a third transmission pipeline are arranged in the middle of the water source pipeline, the output end of the sewage self-priming pump is connected with a farmland pipeline, and the middle of the farmland pipeline is connected with the second transmission pipeline. The far part of the farmland pipeline is connected with a third transmission pipe; and the pipeline is provided with an electric valve. Through cooperation of equipment, the bidirectional irrigation and drainage function is achieved, the limitation of one-way water pumping is broken through, the pump-valve relation can be adjusted according to the real-time situation of the water level of a water source and the water level of a farmland, then one of the four working modes of pump irrigation, pump drainage, self-irrigation and self-drainage can be flexibly selected, and the longitudinally-arranged pipelines are more reasonable.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of irrigation and drainage pump stations, in particular to a movable bidirectional flow channel irrigation and drainage pump station and an implementation method thereof. BACKGROUND

[0002] In the areas along rivers and lakes and low-lying areas, the hydrological conditions show significant seasonal differences. In spring, there is little rainfall, and farmland needs to be irrigated by water from external rivers. In summer and autumn, it is prone to flooding due to heavy rainfall, and the accumulated water needs to be drained. With the acceleration of urbanization and the development of agricultural modernization, the requirements for water conservancy equipment are becoming higher and higher. Urban flood control and drainage require equipment that can respond quickly and be deployed flexibly to deal with sudden waterlogging disasters. Agricultural irrigation requires equipment with high efficiency, energy saving, and precision to meet the water needs of different crops and different growth stages. Traditional water conservancy equipment cannot meet these diverse needs due to its single function, poor mobility, and low energy efficiency. Therefore, a movable irrigation and drainage pump station with bidirectional flow channel, intelligent control, and other characteristics is needed to adapt to complex hydrological conditions and the diverse needs of modern water conservancy scenarios through multi-mode switching and efficient cooperation.

[0003] However, the prior art has the following problems when actually used:

[0004] Traditional pump stations generally only pump water in one direction. When traditional pump stations carry out irrigation and drainage operations, the mode is relatively single. When the relative relationship between the water level of the water source and the water level of the farmland changes, it is difficult to flexibly select the appropriate irrigation or drainage mode, thereby causing low efficiency. SUMMARY

[0005] The present application provides a movable bidirectional flow channel irrigation and drainage pump station and an implementation method thereof, which solves the problem of low efficiency caused by the fact that traditional pump stations generally only pump water in one direction and the mode is relatively single when traditional pump stations carry out irrigation and drainage operations. When the relative relationship between the water level of the water source and the water level of the farmland changes, it is difficult to flexibly select the appropriate irrigation or drainage mode.

[0006] The technical scheme of the present application is as follows:

[0007] The movable bidirectional flow channel irrigation and drainage pump station is an integrated mobile device. The core structure is designed around "functional integration, layout intensification, and intelligent operation". The whole includes three modules: the main structure system, the fluid transmission system, and the intelligent control system. Each module cooperates to realize the functions of bidirectional irrigation and drainage, flexible movement, and efficient operation.

[0008] 1) The main structure system is the foundation bearing and protection core of the pump station, providing structural support for the bidirectional flow channel function and mobility. The specific composition is as follows:

[0009] The overall pump station is a cuboid structure with length x width x height dimensions designed according to actual requirements (commonly 3m x 2m x 2m). The pump house (1) is bolted to the base (6) at the bottom. The base is a welded frame of section steel, and the bottom is provided with a hook interface (3) for easy movement with a trailer or crane. The front and rear sides of the pump house are connected by hinges to two steel double doors that can be opened to 180°.

[0010] Preferably, the pump house is made of high-strength sheet metal material, which has rainproof, dustproof, and corrosion-resistant properties to prevent rainwater from seeping into the interior of the pump house and damaging electrical components. The dustproof design is combined with a door gap rubber sealing strip to reduce the entry of farmland dust and silt, reducing the risk of poor contact caused by equipment dust accumulation. Corrosion treatment extends the rust resistance and service life of the pump house in humid farmland and low-lying water environments.

[0011] 2) The fluid transmission system is the core of the bidirectional flow channel function, which is precisely matched by the pump group, valve group, and pipeline to build a switchable irrigation / drainage flow channel, which is composed of the following components:

[0012] (a) Pump group mechanism: composed of a controller (2), a sewage self-priming pump (17), a vacuum pump (15), and a three-phase motor (16) to form a pump group mechanism.

[0013] Preferably, the sewage self-priming pump is a large-flow self-priming sewage self-priming pump (flow range 50-300m3 / h, lift 10-30m), and the impeller is made of wear-resistant cast iron material suitable for water bodies containing silt and impurities. The wear-resistant impeller can withstand the long-term scouring of silt, straw, and other impurities in the farmland water body, and the flow rate of 50-300m3 / h covers the irrigation / drainage needs of farmland of different scales.

[0014] Preferably, the vacuum pump is a water ring type vacuum pump (suction rate ≥ 15L / s) connected to the inlet end of the sewage self-priming pump to break the air block in the pump and increase the self-priming height (the maximum self-priming height can reach 8m). When the water level is 3-8m lower than the installation height of the pump body, it can still suck water into the pump through vacuum negative pressure, breaking the 3-4m self-priming height limit of traditional self-priming pumps and adapting to complex scenarios such as shallow and low-lying water sources.

[0015] The three-phase motor (power 5.5-37kW) provides power for the sewage self-priming pump and supports variable frequency adjustment (frequency range 30-50Hz). By adjusting the motor frequency to adapt to the actual flow demand (such as reducing the irrigation flow demand from 300m 3 / h to 150m 3 / h, the frequency is reduced from 50Hz to 35Hz), which saves 20%-30% energy compared to fixed-frequency motors, and annual energy saving can reach thousands of degrees.

[0016] (b) Valve group control: 5 electric valves are arranged in the pipeline network, including the first electric valve (11), the second electric valve (10), the third electric valve (13), the fourth electric valve (19), and the fifth electric valve (14). The specific switching logic is as follows: self-weight irrigation condition: open the fourth electric valve (19), the third electric valve (13), and the second electric valve (10), and close the first electric valve (11) and the fifth electric valve (14); pump pressure irrigation condition: open the fourth electric valve (19) and the second electric valve (10), and close the first electric valve (11), the third electric valve (13), and the fifth electric valve (14); self-weight drainage condition: open the first electric valve (11), the third electric valve (13), and the fifth electric valve (14), and close the second electric valve (10) and the fourth electric valve (19); pump pressure drainage condition: open the first electric valve (11) and the fifth electric valve (14), and close the second electric valve (10), the third electric valve (13), and the fourth electric valve (19).

[0017] Preferably, all electric valves are electric ball valves with a caliber matching the corresponding pipeline (e.g., when the water source pipeline caliber is DN100, the fourth electric valve caliber is also DN100), the response time is ≤2s, and manual / remote / automatic control is supported to ensure quick and accurate flow path switching and avoid irrigation / drainage efficiency decline caused by valve group response lag.

[0018] (c) Pipeline layout: the first transmission pipe (20), the second transmission pipe (18), and the third transmission pipe (12) are arranged along the pump house height direction (vertical direction), and the specific layout is as follows: the water source pipeline (21) is connected to the input end of the sewage self-priming pump (17), and the farmland pipeline (9) is connected to the output end of the sewage self-priming pump (17); one end of the first transmission pipe (20) is connected to the farmland pipeline (9) (away from the sewage self-priming pump and close to the second electric valve side), and the other end is connected to the water source pipeline (21); one end of the second transmission pipe (18) is connected to the water source pipeline (21) (close to the sewage self-priming pump side), and the other end is connected to the third transmission pipe (12); one end of the third transmission pipe (12) is connected to the middle of the farmland pipeline (9), and the other end is connected to the second transmission pipe (18).

[0019] Preferably, the longitudinal layout greatly reduces the pump house area, and a conventional pump house size of 3m×2m×2m can accommodate the entire set of pipeline system, which is 30%-40% smaller than the traditional horizontal pipeline layout pump station. The longitudinal pipeline can reduce the number of pipeline bends, reduce the probability of air accumulation in the pipeline, avoid problems such as pump set idling and insufficient flow caused by air blockage, and ensure smooth fluid transmission.

[0020] 3) The intelligent control system takes the controller (2) as the core to realize intelligent management and control of the entire process of equipment operation, specifically including:

[0021] (a) Controller hardware: an industrial-grade PLC controller (such as Siemens S7-1200 series) is adopted, equipped with a touch display screen (10.1 inches), supporting external liquid level sensors, flow meters (7), pressure gauges (8) and other monitoring elements, with data acquisition, logic operation, device control functions. Among them, the flow meter (7) is connected to the straight pipe section of the pipeline, with an accuracy of ±1.5%, which can monitor the pipeline flow in real time; the pressure gauge (8) is installed on the output pipeline of the sewage self-priming pump (17) through a threaded interface, with a range of 0-1MPa, used to monitor the inlet and outlet pressure of the pipeline, providing data support for pump group adjustment and fault warning.

[0022] (b) Operation mode: supports seamless switching of three operation modes. Manual operation: through the controller display screen or physical buttons in the pump house, real-time control of pump group start / stop, valve group on / off; automatic operation: preset water level threshold parameters (such as water source water level ≥ farmland water level + 0.5m triggers self-irrigation mode), controller automatically switches working mode according to real-time data of liquid level sensor; remote operation: through 4G / 5G module access to cloud platform, users can check device status, send control instructions (delay ≤5s) through mobile phone APP or computer client.

[0023] (c) Monitoring function: real-time acquisition of pipeline flow (flow meter accuracy ±1.5%), inlet and outlet pressure (pressure gauge range 0-1MPa), pump group current / voltage, pump house temperature and other parameters, when abnormal conditions such as overpressure (≥0.8MPa), overcurrent (more than 120% of rated flow), motor overload, pump house temperature exceeding 40℃ occur, automatic triggering of audible and visual alarm and shutdown protection.

[0024] (4) The pump station has four working modes of self-weight irrigation, pump pressure irrigation, self-weight drainage and pump pressure drainage. In self-weight irrigation mode, the water level of the water source is higher than that of the farmland, and the water flows from the water source to the farmland under the action of gravity. At this time, the fourth electric valve (19) needs to be opened, and the third electric valve (13) and the second electric valve (10) need to be opened to complete the self-weight irrigation. In pump pressure irrigation mode, the water level of the water source is lower than that of the farmland, and the water flows from the water source to the farmland under the action of pump pressure. At this time, the vacuum pump (15) and the sewage self-priming pump (17) need to be started, and the fourth electric valve (19) and the second electric valve (10) need to be opened to complete the pump pressure irrigation. In self-weight drainage mode, the water level of the water source is higher than that of the farmland, and the water flows from the farmland to the water source under the action of gravity. At this time, the first electric valve (11) needs to be opened, and the third electric valve (13) and the fifth electric valve (14) need to be opened to complete the self-weight drainage. In pump pressure drainage mode, the water level of the water source is lower than that of the farmland, and the water flows from the farmland to the water source under the action of pump pressure. At this time, the vacuum pump (15) and the sewage self-priming pump (17) need to be started, and the first electric valve (11) and the fifth electric valve (14) need to be opened to complete the pump pressure drainage.

[0025] The beneficial effects of the present application are as follows:

[0026] The movable bidirectional flow channel irrigation and drainage pump station of the present application is provided with a sewage self-suction pump, a controller, a farmland pipeline, a transmission pipeline and a water source pipeline, which are cooperatively arranged, so that the equipment has the characteristics of bidirectional flow channel structure, breaks through the limitation of one-way pumping, and when the relative relationship between the water level of the water source and the water level of the farmland changes, the controller can switch the power of the sewage self-suction pump for pumping or draining according to the direction of the water flow, so as to flexibly select the appropriate irrigation or drainage mode, and the longitudinally arranged pipeline is more reasonable, saving the floor area of the pump house, and avoiding the problem that the traditional pump station can only pump water in one direction, and the mode is single when the traditional pump station carries out irrigation and drainage operation, and with the cooperation of the sewage self-suction pump and the controller, the controller can adjust the speed of the sewage self-suction pump according to the actual water demand and the change of the external pipeline pressure, so as to realize the continuous and accurate adjustment and control of the flow and head of the sewage self-suction pump under different working conditions. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 It is a schematic diagram of the pump house structure of the present application;

[0028] Figure 2 It is a schematic diagram of the pipeline structure of the present application

[0029] Figure 3 It is a front view of the pump station of the present application;

[0030] Figure 4 It is a back view of the pump station of the present application.

[0031] In the figure: 1, pump house; 2, controller; 3, hook interface; 4, fan; 5, door; 6, base; 7, flow meter; 8, pressure gauge; 9, farmland pipeline; 10, second electric valve; 11, first electric valve; 12, third transmission pipe; 13, third electric valve; 14, fifth electric valve; 15, vacuum pump; 16, three-phase motor; 17, sewage self-suction pump; 18, second transmission pipe; 19, fourth electric valve; 20, first transmission pipe; 21, water source pipeline. DETAILED DESCRIPTION

[0032] In the present application, the working steps of the device are as follows:

[0033] The pump house (1) is fixed on the top of the base (6) by high-strength bolts, the front end and the rear end of the base (6) are welded with hook interfaces (3), the hook interfaces (3) can be connected with a trailer or a crane to realize vehicle transportation during transportation, the front and rear sides of the pump house (1) are connected with doors (5) with rubber sealing strips and mechanical door locks through stainless steel hinges; the controller (2) is fixed in the pump house (1), the pump house (1) is provided with an external power supply interface for power-on, after power-on, the controller (2) is connected with three-phase motors (16), vacuum pumps (15) and second electric valves (10), first electric valves (11), third electric valves (13), fifth electric valves (14), fourth electric valves (19) and other electric valves through cables, is connected with flow meters (7) and pressure gauges (8) through signal lines, and realizes remote communication by means of a built-in wireless module; the sewage self-suction pump (17) is connected with a water source pipeline (21) at the input end and is connected with a farmland pipeline (9) at the output end, the vacuum pump (15) is connected with the sewage self-suction pump (17) through a branch pipe, the water source pipeline (21) is connected with the second transmission pipe (18) and the first transmission pipe (20) through a three-way pipe at the middle part, the farmland pipeline (9) is connected with the third transmission pipe (12) through a three-way pipe at the middle part and is connected with the other end of the first transmission pipe (20) at the tail end, the second electric valve (10), the first electric valve (11), the third electric valve (13), the fifth electric valve (14) and the fourth electric valve (19) are respectively connected in the corresponding pipeline through series connection, the flow meter (7) is connected with a straight pipe section of the pipeline, and the pressure gauge (8) is installed on the output pipeline of the sewage self-suction pump (17) through a threaded interface; the three-phase motor (16) and the sewage self-suction pump (17) are coaxially connected through a shaft coupling and are fixed on the same bracket, the fan (4) is bolted on the ventilation opening of the pump house (1) and is connected with a dustproof filter screen on the inner side through buckling, and the whole is connected through mechanical rigidity connection, flange, pipeline connection and electrical signal control connection, so as to form an integrated operation system with stable structure and switchable flow channel.

[0034] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. 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 the present application.

[0035] Embodiment one:

[0036] When the water source level is low and cannot flow into the farmland naturally, the staff can select the pump pressure irrigation mode in the controller 2, that is, the pump irrigation mode. First, the second electric valve 10 and the fourth electric valve 19 are opened, the first electric valve 11, the third electric valve 13 and the fifth electric valve 14 are closed, the vacuum pump 15 is started to form a vacuum, and then the sewage self-priming pump 17 is started to make the water source flow into the water source pipeline 21, and then the water is sent into the farmland pipeline 9 by the sewage self-priming pump 17, and then the water flows into the farmland through the farmland pipeline 9. After the water flow is stable, the frequency of the three-phase motor 16 is adjusted by the controller 2 to realize variable frequency energy saving.

[0037] Example two:

[0038] When the farmland water level is lower than the water source water level, gravity natural irrigation can be used. The staff can select the self-weight irrigation mode, that is, the self-irrigation mode. First, the second electric valve 10, the third electric valve 13 and the fourth electric valve 19 are opened, the first electric valve 11 and the fifth electric valve 14 are closed, and then the water flows into the second transmission pipe 18 through the water source pipeline 21, and then the water flows into the farmland through the farmland pipeline 9. In this mode, the pump does not need to be started, and only the water level difference between the farmland and the water source is used to make the water flow naturally, and the whole process does not consume energy.

[0039] Example three:

[0040] When the farmland water level is high and cannot be naturally discharged from the farmland, the staff can select the pump pressure drainage mode in the controller 2, that is, the pump drainage mode. First, the first electric valve 11 and the fifth electric valve 14 are opened, the second electric valve 10, the third electric valve 13 and the fourth electric valve 19 are closed, the vacuum pump 15 is started to form a vacuum, and then the sewage self-priming pump 17 is started to make the farmland accumulated water flow into the farmland pipeline 9, and then the water flows into the first transmission pipe 20 through the third water transmission pipe 12, and then the water is sent into the first transmission pipe 20 by the sewage self-priming pump 17, and then the water flows to the water source pipeline 21, and then the water is discharged through the water source pipeline 21. After the water flow is stable, the frequency of the three-phase motor 16 is adjusted by the controller 2 to realize variable frequency energy saving.

[0041] Example four:

[0042] When the farmland water level is higher than the water source water level, gravity natural drainage can be used. The staff can select the self-weight drainage mode, that is, the drainage mode. First, the first electric valve 11, the third electric valve 13 and the fifth electric valve 14 are opened, the second electric valve 10 and the fourth electric valve 19 are closed, and then the farmland accumulated water flows into the first transmission pipe 12 through the water source pipeline 9, and then the water flows into the first transmission pipe 20 through the second transmission pipe 18, and then the water flows into the water source pipeline 21 through the first transmission pipe 20, and then the water is discharged through the water source pipeline 21. In this mode, the pump does not need to be started, and only the water level difference between the farmland and the water source is used to make the water flow naturally, and the whole process does not consume energy.

[0043] The electric elements appearing in the text are all connected with the main controller and 380V electricity, and the main controller can control the equipment as a computer.

[0044] Although embodiments of the present application have been shown and described, it is to be understood that various modifications, substitutions, replacements and changes can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A mobile bidirectional flow channel irrigation and drainage pumping station comprising a pump house (1), a controller (2), a hook interface (3), a fan (4), a house door (5), a base (6), a flow meter (7), a pressure gauge (8), a farmland pipeline (9), a second electric valve (10), a first electric valve (11), a third transmission pipe (12), a third electric valve (13), a fifth electric valve (14), a vacuum pump (15), a three-phase motor (16), a sewage self-suction pump (17), a second transmission pipe (18), a fourth electric valve (19), a first transmission pipe (20) and a water source pipeline (21), characterized in that: The inner bottom wall of the pump house (1) is connected with a sewage self-suction pump (17), an input end of the sewage self-suction pump (17) is connected with a water source pipeline (21), a fourth electric valve (19) is arranged on the outer surface of the middle part of the water source pipeline (21), an output end of the sewage self-suction pump (17) is connected with a farmland pipeline (9), a second electric valve (10) is arranged on the outer surface of the farmland pipeline (9) away from the sewage self-suction pump (17), a first transmission pipeline (20) is connected to the outer surface of the farmland pipeline (9) away from the sewage self-suction pump (17) and close to the second electric valve (10), a fifth electric valve (14) is arranged on the outer surface of the first transmission pipeline (20), the other end of the first transmission pipeline (20) is connected with the other side of the water source pipeline (21), a second transmission pipeline (18) is connected to the outer surface of the water source pipeline (21) close to the sewage self-suction pump (17), a third electric valve (13) is arranged on the outer surface of the middle part of the second transmission pipeline (18), the other end of the second transmission pipeline (18) is connected with a third transmission pipeline (12), a first electric valve (11) is arranged on the outer surface of the middle part of the third transmission pipeline (12), one end of the third transmission pipeline (12) is connected with the outer surface of the farmland pipeline (9), the other end of the third transmission pipeline (12) is connected with the second transmission pipeline (18), the pump station has four working modes of self-weight irrigation, pump pressure irrigation, self-weight drainage and pump pressure drainage, under the self-weight irrigation working condition, the water level of the water source is higher than that of the farmland, the water flows from the water source to the farmland under the action of the self-weight, at this time, the fourth electric valve (19), the third electric valve (13) and the second electric valve (10) need to be opened, and the self-weight irrigation is completed, under the pump pressure irrigation working condition, the water level of the water source is lower than that of the farmland, the water flows from the water source to the farmland under the action of the pump pressure, at this time, the vacuum pump (15) and the sewage self-suction pump (17) need to be started, and the fourth electric valve (19) and the second electric valve (10) need to be opened, and the pump pressure irrigation is completed, under the self-weight drainage working condition, the water level of the water source is higher than that of the farmland, the water flows from the farmland to the water source under the action of the self-weight, at this time, the first electric valve (11), the third electric valve (13) and the fifth electric valve (14) need to be opened, and the self-weight drainage is completed, under the pump pressure drainage working condition, the water level of the water source is lower than that of the farmland, the water flows from the farmland to the water source under the action of the pump pressure, at this time, the vacuum pump (15) and the sewage self-suction pump (17) need to be started, and the first electric valve (11) and the fifth electric valve (14) need to be opened, and the pump pressure drainage is completed.

2. A mobile bi-directional flume irrigation and drainage pumping plant according to claim 1, characterized in that: The controller (2), the vacuum pump (15), the three-phase motor (16) and the sewage self-suction pump (17) constitute a set of pump group mechanism.

3. A mobile bi-directional flume irrigation and drainage pumping plant according to claim 1, characterized in that: The controller (2) has three operation modes of manual operation, automatic operation and remote operation.

4. A mobile bi-directional flume irrigation and drainage pumping plant according to claim 1, characterized in that: The front and rear surfaces of the pump house (1) are connected with two house doors (5) through hinges.

5. A mobile bi-directional flume irrigation and drainage pumping plant according to claim 1, characterized in that: The pump house (1) is provided with a fan (4).

6. A mobile bi-directional flume irrigation and drainage pumping plant according to claim 1, characterized in that: The first transmission pipeline (20), the second transmission pipeline (18) and the third transmission pipeline (12) are arranged along the height direction of the pump house.

7. A mobile bi-directional flume irrigation and drainage pumping plant according to claim 1, characterized in that: The hook interface (3) is connected with the base (6).

8. A mobile bi-directional flume irrigation and drainage pumping plant according to claim 1, characterized in that, The working steps of the pump station are as follows: The pump house (1) is fixed on the top of the base (6) by high-strength bolts, the front end and the rear end of the base (6) are welded with hook interfaces (3), the hook interfaces (3) can be connected with a trailer or a crane to realize vehicle transportation during transportation, the front and rear sides of the pump house (1) are connected with doors (5) with rubber sealing strips and mechanical door locks through stainless steel hinges; the controller (2) is fixed in the pump house (1), the pump house (1) is provided with an external power supply interface for power supply, after power supply, the controller (2) is connected with three-phase motor (16), vacuum pump (15) and second electric valve (10), first electric valve (11), third electric valve (13), fifth electric valve (14), fourth electric valve (19) and other electric valves through cables, is connected with flow meter (7) and pressure gauge (8) through signal lines, and realizes remote communication by means of built-in wireless module; the sewage self-suction pump (17) is connected with the water source pipeline (21) at the input end and is connected with the farmland pipeline (9) at the output end, the vacuum pump (15) is connected with the sewage self-suction pump (17) through a branch pipe, the water source pipeline (21) is connected with the second transmission pipe (18) and the first transmission pipe (20) through a three-way pipe, the farmland pipeline (9) is connected with the third transmission pipe (12) through a three-way pipe, and the other end of the third transmission pipe (12) is connected with the first transmission pipe (20), the second electric valve (10), the first electric valve (11), the third electric valve (13), the fifth electric valve (14) and the fourth electric valve (19) are respectively connected in the corresponding pipeline, the flow meter (7) is connected with the straight pipe section of the pipeline, and the pressure gauge (8) is installed on the output pipeline of the sewage self-suction pump (17) through a threaded interface; the three-phase motor (16) and the sewage self-suction pump (17) are coaxially connected through a shaft coupling and are fixed on the same bracket, the fan (4) is installed on the ventilation opening of the pump house (1) through bolts and is connected with a dustproof filter screen on the inner side, the whole is connected through mechanical rigidity, flanges, pipeline connection and electrical signal control, and forms a stable structure, a switchable flow channel and an integrated operation system.

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