A sewage lifting device

Abstract

The application relates to the technical field of sewage lifting equipment, in particular to a sewage lifting device. The device comprises a box body, at least two sewage pumps arranged on the box body, at least three liquid level detection pieces, the at least three liquid level detection pieces comprising a first detection piece, a second detection piece and a third detection piece, the liquid level detection pieces being used for detecting the liquid level height in the box body, the first detection piece being arranged at a height close to the bottom of the box body, the second detection piece being arranged at a height close to the top of the box body, and the third detection piece being arranged at a height between the first detection piece and the second detection piece, and a control assembly, the sewage pumps and the at least three liquid level detection pieces being connected with the control assembly. The control assembly implements graded start-stop control on the sewage pumps according to different liquid level grades, starts part of the water pumps when the third detection piece is positioned, starts all the water pumps when the second detection piece is positioned, and stops the water pumps when the first detection piece is positioned. The at least two sewage pumps can be matched with the sewage inflow, and the energy consumption of the sewage pumps is reduced.

Description

Technical Field

[0001] This application relates to the field of wastewater treatment equipment technology, and in particular to a wastewater lifting device. Background Technology

[0002] In areas such as basements, sunken spaces, low-rise villas, underground commercial facilities, renovations of old residential areas, and buildings far from municipal sewage networks, domestic sewage cannot be discharged by gravity flow and requires the use of sewage lifting devices for centralized collection, sealed storage, and pressurized lifting.

[0003] The existing sewage lifting device includes a tank, a water pump, a first liquid level sensor, and a second liquid level sensor. The water pump is mounted on the tank, the first liquid level sensor is located near the bottom of the tank, and the second liquid level sensor is located near the top of the tank. Domestic sewage flows into the tank. When the liquid level in the tank triggers the second liquid level control sensor, the water pump starts to discharge the sewage from the tank. When the liquid level in the tank drops to the first liquid level sensor, the water pump is turned off.

[0004] However, the aforementioned sewage lifting device consumes a lot of water pump energy when the sewage discharge is low. Summary of the Invention

[0005] This application provides a sewage lifting device to solve the problem of high pump energy consumption when the sewage discharge is low.

[0006] This application provides a sewage lifting device, including:

[0007] Box;

[0008] At least two sewage pumps are installed on the tank.

[0009] At least three liquid level detection elements, including a first detection element, a second detection element and a third detection element, are used to detect the liquid level in the tank. The at least three liquid level detection elements are arranged sequentially at intervals along the height direction of the tank. The first detection element is set at a height close to the bottom of the tank, and the second detection element is set at a height close to the top of the tank.

[0010] The control component, the sewage pumps, and at least three level sensors are all connected to the control component. The control component is configured to control at least two sewage pumps to shut down when the first sensor is triggered, control one sewage pump to turn on when the third sensor is triggered, and control all sewage pumps to turn on when the second sensor is triggered.

[0011] In one possible embodiment, at least one of the first detection element, the second detection element, and the third detection element includes a housing and a trigger element disposed within the housing, the housing being connected to the inner wall of the housing;

[0012] The trigger is configured to be activated by the outer shell when the water level inside the tank reaches the outer shell and the outer shell moves with the water level.

[0013] In one possible embodiment, a first connector is also included, through which the outer shell and the inner wall of the housing are connected.

[0014] In one possible embodiment, the tank is also provided with a drain outlet for discharging domestic sewage from the tank.

[0015] In one possible embodiment, a effluent assembly is also included, which is connected to at least two sewage pumps and to a drain outlet.

[0016] In one possible embodiment, the water outlet assembly includes a check valve, an outlet pipe, and a discharge valve, which are connected in sequence. The check valve is connected to a sewage pump, and the discharge valve is connected to a drain outlet.

[0017] In one possible embodiment, the tank is provided with at least two water inlets for discharging domestic sewage into the tank.

[0018] At least two water inlets are located on the two sides of the tank or on one end of the top of the tank, and the drain outlet is located on the top of the tank.

[0019] In one possible embodiment, the control component includes a controller and a control panel, the control panel being connected to the controller, the controller being connected to a sewage pump, and the controller being connected to at least three level sensors.

[0020] In one possible embodiment, at least two wires are also included, with the controller connected to the sewage pump and the controller connected to the level detection device via wires.

[0021] In one possible embodiment, a drain valve is also included, which is located at the bottom of the housing.

[0022] This application provides a sewage lifting device, which includes a tank, at least two sewage pumps, at least three liquid level detection devices, and a control component. The at least two sewage pumps are mounted on the tank. The at least three liquid level detection devices include a first detection device, a second detection device, and a third detection device. The liquid level detection devices are used to detect the liquid level height inside the tank. The at least three liquid level detection devices are arranged at intervals along the height of the tank. The first detection device is positioned near the bottom of the tank, the second detection device is positioned near the top of the tank, and the third detection device is positioned between the first and second detection devices. The control component controls the sewage pumps to shut down, start one sewage pump, or start all sewage pumps respectively, based on the liquid level reaching the position of different detection devices.

[0023] The inclusion of at least three liquid level sensors and at least two sewage pumps enables the sewage lifting device provided in this embodiment to adjust the sewage lifting capacity in stages according to changes in the liquid level inside the tank, thereby preventing the sewage pumps from operating under high load or mismatched conditions for extended periods and reducing the energy consumption of the sewage pumps when the drainage volume is low. Attached Figure Description

[0024] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0025] Figure 1 A schematic diagram of the sewage lifting device provided in this application;

[0026] Figure 2 for Figure 1 A structural diagram of the middle box from another direction;

[0027] Figure 3 for Figure 2 A schematic diagram of the structure from another direction;

[0028] Figure 4 for Figure 3 A schematic diagram of the structure from another direction;

[0029] Figure 5 A schematic diagram showing the location of the liquid level detection element in the wastewater lifting device provided in this application;

[0030] Figure 6 for Figure 5 A schematic diagram of the structure of the first testing component.

[0031] Explanation of reference numerals in the attached figures:

[0032] 100 - Housing; 110 - Drain outlet; 120 - Water inlet; 130 - Drain valve; 140 - Ventilation outlet;

[0033] 200-Sewage pump;

[0034] 300 - Liquid level detection element; 310 - First detection element; 311 - Housing; 312 - Trigger element;

[0035] 320 - Second inspection piece; 330 - Third inspection piece;

[0036] 400 - Control component; 410 - Controller; 420 - Control panel;

[0037] 500 - First connector; 510 - Wire;

[0038] 600 - Water outlet assembly; 610 - Check valve; 620 - Water outlet pipe; 630 - Drain valve.

[0039] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0040] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0041] In the embodiments of this application, the terms "upper," "lower," "inner," "middle," "outer," "front," and "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for better description of this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation. Furthermore, some of the above terms may be used to indicate other meanings besides orientation or positional relationship; for example, the term "upper" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in the embodiments of this application according to the specific circumstances.

[0042] Furthermore, the terms "set up," "connect," and "fix" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this disclosure according to the specific circumstances.

[0043] The terms “first,” “second,” “third,” “fourth,” etc. (if present) in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a particular order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented, for example, in a sequence other than those illustrated or described herein.

[0044] In this application, the terms "exemplary" or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described as "exemplary" or "for example" in this application should not be construed as being more preferred or advantageous than other embodiments or designs. Specifically, the use of terms such as "exemplary" or "for example" is intended to present the relevant concepts in a specific manner.

[0045] Unless otherwise stated, the term "multiple" means two or more.

[0046] In areas such as basements, sunken spaces, low-rise villas, underground commercial facilities, renovations of old residential areas, and buildings far from municipal sewage networks, domestic sewage cannot be discharged by gravity flow and requires the use of sewage lifting devices for centralized collection, sealed storage, and pressurized lifting.

[0047] The existing sewage lifting device includes a tank, a water pump, a first liquid level sensor, and a second liquid level sensor. The water pump is mounted on the tank, the first liquid level sensor is located near the bottom of the tank, and the second liquid level sensor is located near the top of the tank. Domestic sewage flows into the tank. When the liquid level in the tank triggers the second liquid level control sensor, the water pump starts to discharge the sewage from the tank. When the liquid level in the tank drops to the first liquid level sensor, the water pump is turned off.

[0048] However, when the sewage discharge volume is low, the water pump of the aforementioned sewage lifting device always operates at the energy consumption of the high discharge volume, resulting in high water pump energy consumption.

[0049] This application provides a sewage lifting device, which includes a tank, at least two sewage pumps, at least three liquid level detection devices, and a control component. The at least two sewage pumps are mounted on the tank. The at least three liquid level detection devices include a first detection device, a second detection device, and a third detection device. The liquid level detection devices are used to detect the liquid level height inside the tank. The at least three liquid level detection devices are arranged at intervals along the height of the tank. The first detection device is positioned near the bottom of the tank, the second detection device is positioned near the top of the tank, and the third detection device is positioned between the first and second detection devices. The control component controls the sewage pumps to shut down, start one sewage pump, or start all sewage pumps respectively, based on the liquid level reaching the position of different detection devices.

[0050] The inclusion of at least three liquid level sensors and at least two sewage pumps enables the sewage lifting device provided in this embodiment to adjust the sewage lifting capacity in stages according to changes in the liquid level inside the tank, thereby preventing the sewage pumps from operating under high load or mismatched conditions for extended periods and reducing the energy consumption of the sewage pumps when the drainage volume is low.

[0051] Reference Figures 1 to 6As shown, this application embodiment provides a sewage lifting device, including a tank 100; at least two sewage pumps 200, which are disposed inside the tank 100; and at least three liquid level detection elements 300, which include a first detection element 310, a second detection element 320, and a third detection element 330. The liquid level detection elements 300 are used to detect the liquid level inside the tank 100. The at least three liquid level detection elements 300 are arranged sequentially at intervals along the height direction of the tank 100. The first detection element 310 is set at a height close to the bottom of the tank 100, and the second detection element 320 is set at a height close to the top of the tank 100.

[0052] The control component 400, the sewage pump 200, and at least three level detection elements 300 are all connected to the control component 400. The control component 400 is configured to control at least two sewage pumps 200 to shut down when the first detection element 310 is triggered, control one sewage pump 200 to turn on when the third detection element 330 is triggered, and control all sewage pumps 200 to turn on when the second detection element 320 is triggered.

[0053] The tank 100 is used to carry and temporarily store the sewage to be lifted. The sewage pump 200 is used to pressurize and transport the sewage in the tank 100 to the external drainage system. The liquid level detection device 300 is used to detect the liquid level height in the tank 100 and output the corresponding liquid level information. The control component 400 is used to perform graded start and stop control of the sewage pump 200 based on the liquid level detection information.

[0054] The housing 100 refers to the shell structure used to contain, temporarily store, and collect sewage. The function of the housing 100 is to provide a stable space for the temporary storage of sewage and level detection, and to provide an installation foundation and sealing boundary for the sewage pump 200 to suction and discharge. The housing 100 constitutes the main body of the device, and the sewage pump 200 and the level detection device 300 are both installed inside the housing 100, forming an integrated sewage collection and lifting unit.

[0055] In one possible embodiment, the housing 100 can be a rectangular box-shaped shell, a cylindrical shell, or an irregularly shaped one-piece molded shell. The material of the housing 100 can be polyethylene, polypropylene, stainless steel, or fiberglass to meet different requirements for corrosion resistance, strength, and molding process. In terms of size and proportion, the height of the housing 100 can be greater than the length and width of the housing 100 so that at least three liquid level detection elements 300 can be arranged along the height direction to form a graded control space. The effective volume of the housing 100 can be configured to adapt to the conventional liquid storage scale for intermittent discharge according to the usage scenario, and sufficient space should be reserved in the bottom area for the installation of the sewage pump 200 and the pumping operation at the lowest liquid level.

[0056] The sewage pump 200 refers to the power execution unit installed inside the tank 100 and used to lift and discharge sewage. The function of the sewage pump 200 is to apply conveying pressure to the sewage inside the tank 100 under the drive of the control component 400, so that the sewage is discharged to the upper pipeline network or treatment facilities, thereby completing the sewage lifting. The sewage pump 200 can be installed at the bottom of the tank 100 through a pump base, guide rail or fixed bracket.

[0057] In one possible embodiment, the sewage pump 200 may be a submersible centrifugal pump, a cutting sewage pump 200, or a screw sewage pump 200; at least two sewage pumps 200 should be arranged independently within the housing 100, with reserved space for maintenance and heat dissipation. The installation height of the sewage pumps 200 is usually close to the bottom of the housing 100 so that residual sewage can still be pumped out under low liquid level conditions, and the flow rate specifications of each pump can be matched according to the conventional discharge capacity and peak discharge requirements of a single pump to adapt to the graded operation under different inflow conditions.

[0058] At least three liquid level detection elements 300 refer to liquid level status sensing units that are arranged sequentially and at intervals along the height direction of the tank 100. The function of the liquid level detection elements 300 is to output detection signals corresponding to different liquid level heights, so that the control component 400 can identify the range of sewage in the tank 100 and implement differentiated control, thereby dividing the liquid level change into multiple manageable working levels.

[0059] The level detection element 300 is connected to the control component 400 to ensure that the level information can be transmitted in real time. In one possible embodiment, the level detection element 300 can be a float-type level switch, an electrode-type level sensor, or a reed-type level switch. It can also be replaced by ultrasonic detection, pressure detection, or photoelectric detection to adapt to different sewage media and installation conditions. At least three detection elements are distributed sequentially along the height direction of the tank 100. The first detection element 310 is set at a height close to the bottom of the tank 100, the second detection element 320 is set at a height close to the top of the tank 100, and the installation height of the third detection element 330 is between the two. The spacing between each detection element can be set according to the effective height of the tank 100. The distance between the first detection element 310 and the bottom of the tank 100 is usually used to characterize the near emptying or minimum safe level. The third detection element 330 is used to characterize the intermediate transition zone, and the second detection element 320 is used to characterize the near full load or high load zone.

[0060] The control component 400 refers to the control unit that is electrically or communicatively connected to both the sewage pump 200 and the liquid level detection device 300. The function of the control component 400 is to receive the liquid level information output by the liquid level detection device 300 and to implement start-stop, linkage, or switching control of each sewage pump 200 according to the preset control logic, so as to form a graded discharge strategy based on the liquid level height.

[0061] In one possible embodiment, the control component 400 may be an embedded controller 410, a PLC (Programmable Logic Controller) controller 410, or a microprocessor control module. It may also be a discrete relay control, a microcontroller control, or an IoT remote control module to adapt to different levels of automation and maintenance needs. The structural dimensions of the control component 400 may be configured according to the number of electrical components, heat dissipation requirements, and protection level. The control logic should at least have the ability to identify the first detection element 310, the third detection element 330, and the second detection element 320, and be able to output shutdown, single pump operation, and full pump operation commands respectively under different liquid level states.

[0062] The wastewater lifting device provided in this application embodiment includes at least two wastewater pumps 200 installed in a tank 100, and a first detection element 310, a third detection element 330, and a second detection element 320 arranged sequentially along the height direction of the tank 100. This enables the control component 400 to implement graded scheduling based on different intervals during the rise of the wastewater level. When the system starts, wastewater first enters the tank 100 for temporary storage. As the incoming water continues to increase, the level detection device 300 gradually outputs corresponding signals, and the control component 400 judges the liquid level status in the tank 100 accordingly. When the liquid level is at the first detection device 310, the wastewater pump 200 remains stopped or in a low-load standby state to avoid unnecessary operation when the incoming water is insufficient. When the liquid level rises and triggers the third detection device 330, the control component 400 controls one of the wastewater pumps 200 to start, so that the device can complete the basic discharge with low energy consumption, thereby suppressing the liquid level from continuing to rise. When the liquid level rises and triggers the second detection device 320, the control component 400 controls all the wastewater pumps 200 to start, so as to quickly cope with the sudden increase in incoming water with a higher discharge capacity and prevent the liquid level in the tank 100 from continuing to accumulate. When the liquid level falls back to the position corresponding to the first detection device 310, the control component 400 controls at least two wastewater pumps 200 to shut down, so that the system returns to a low-load or standby state, thereby forming a closed-loop control process that matches the liquid level change.

[0063] Through a tiered control method using at least three level sensors 300 and at least two sewage pumps 200, the sewage lifting device can adjust the number of pumps in operation according to actual inflow fluctuations. This reduces ineffective operation and energy consumption under low flow conditions, while enhancing discharge capacity and reducing level fluctuations under high flow conditions. This reduces the energy consumption of the sewage pumps 200, improves equipment start-up and shutdown frequency, enhances discharge timeliness, and helps extend the service life of the sewage pumps 200 and related electrical components. It should be understood that the above example is merely illustrative and not limiting. Without departing from the technical concept of this application, the number of sewage pumps 200, the type of level sensors 300, and the implementation of the control components 400 can all be adjusted according to actual application needs.

[0064] Reference Figure 5 and Figure 6 As shown, based on the aforementioned embodiments, at least one of the first detection element 310, the second detection element 320, and the third detection element 330 includes a housing 311 and a trigger element 312 disposed within the housing 311. The housing 311 is connected to the inner wall of the tank 100. The trigger element 312 is configured to be triggered by the housing 311 when the water level in the tank 100 reaches the housing 311 and the housing 311 moves with the water level.

[0065] In one possible embodiment, the housing 311 is a load-bearing protective structure for accommodating the trigger 312 and contacting the sewage inside the tank 100 to achieve liquid level sensing. The housing 311 forms a relatively sealed or semi-sealed mounting cavity inside to limit and protect the trigger 312. The trigger 312 is a sensing structure or mechanical triggering structure that outputs a liquid level status signal when the housing 311 undergoes displacement, swinging, or posture change with the liquid level. The trigger 312 can transmit the liquid level change signal to the control component 400 so that the control component 400 can complete the start and stop control of at least two sewage pumps 200 based on the liquid level signal.

[0066] The outer casing 311 is connected to the inner wall of the tank 100, and the outer casing 311 can move with changes in liquid level, enabling the outer casing 311 to stably respond to changes in the liquid level inside the tank 100. The trigger 312 and the outer casing 311 can be connected by a floating fit, a swing fit, an elastic reset fit, or a magnetic coupling fit. When the outer casing 311 floats up with the rise in water level or moves down with the fall in water level, the trigger 312 will correspondingly undergo displacement, rotation, contact closure, or conduction state reversal, and transmit this state change to the control component 400, thereby enabling the control component 400 to control the opening or closing of at least two sewage pumps 200 according to the liquid level.

[0067] The outer shell 311 can be a hollow spherical shell, cylindrical shell, box-shaped shell, or tubular shell in shape, and the material can be any one or more of corrosion-resistant plastic, ABS (Acrylonitrile Butadiene Styrene), PP (Polypropylene), 304 stainless steel, or rubber-coated composite material to adapt to long-term use in wastewater environments; the trigger element 312 can be a float, lever contact, magnet and spring combination, pressure trigger diaphragm, or capacitive sensing element in shape, and the material can be any one or more of ABS, PP, metal conductive sheet, rubber, permanent magnet material, or corrosion-resistant elastic material.

[0068] The outer diameter, length, or thickness of the housing 311 is usually matched with the installation space and the set liquid level height to ensure that the liquid level detection element 300 can move freely with the liquid level change within the housing 100 without jamming. The effective stroke of the trigger element 312 is in the millimeter to centimeter range and should be set according to the liquid level resolution. Sufficient assembly clearance should also be maintained between the housing 311 and the inner wall of the housing 100 to avoid frictional interference, so as to ensure detection stability and repeatability.

[0069] When the system starts, the sewage level inside the tank 100 changes continuously with the amount of water discharged. Under the action of buoyancy, the outer shell 311 floats, sinks, or tilts slightly relative to the inner wall of the tank 100, which in turn drives the trigger 312 inside the outer shell 311 to move. The trigger 312 converts the mechanical displacement into a recognizable liquid level signal and transmits it to the control component 400. After receiving the corresponding signal, the control component 400 can switch at least two sewage pumps 200 on or off in combination with the preset control logic, so that the operating status of at least two sewage pumps 200 is synchronized with the liquid level change inside the tank 100.

[0070] Since the liquid level information is output through the linkage between the housing 311 and the trigger 312, the housing 311 not only undertakes the function of liquid level contact and transmission, but also protects and supports the trigger 312. Therefore, it can maintain a relatively stable detection response under conditions where the sewage contains impurities, foam, or fluctuates greatly, reducing the probability of the trigger 312 being malfunctioning due to direct impact from dirt. At the same time, the control component 400 can implement graded control of at least two sewage pumps 200 according to different liquid level states, so that at least two sewage pumps 200 reduce ineffective operation in the low liquid level or low flow stage, and increase discharge capacity in a timely manner in the high liquid level or instantaneous high flow stage. This helps to improve the response accuracy and operational stability of the sewage lifting device, and reduces the energy consumption of the sewage pumps 200. It should be understood that the above example is only illustrative and not limiting. Without departing from the technical concept of this application, the specific structure, materials, and connection methods of the housing 311 and the trigger 312 can be adjusted accordingly.

[0071] Reference Figure 5 and Figure 6 As shown, in one possible implementation, a first connector 500 is also included, through which the outer shell 311 is connected to the inner wall of the housing 100.

[0072] In this application, the first connector 500 is a connection structure used to fix the outer shell 311 to the inner wall of the housing 100. The first connector 500 is used to realize the installation positioning, force support and limit retention between the outer shell 311 and the housing 100, so that the outer shell 311 can maintain a preset installation posture in the housing 100, thereby ensuring that the trigger 312 set in the outer shell 311 can move accurately according to the designed liquid level height.

[0073] The first connector 500 is disposed between the outer shell 311 and the inner wall of the housing 100, forming a stable connection between the two. In one possible embodiment, the first connector 500 can be detachably connected by screws and nuts. The outer shell 311 is provided with mounting ears or mounting holes, and the inner wall of the housing 100 is provided with corresponding connection holes or pre-embedded nuts. After assembly, the outer shell 311 is locked in a predetermined position by fasteners. In another exemplary embodiment, the first connector 500 can also be a snap-on bracket, a clamp-type fastener, or a mounting base structure, which uses clamping, fastening, or lifting methods to limit the outer shell 311. In yet another exemplary embodiment, the first connector 500 can also be a flange seat with a sealing gasket, a pressure plate, or a guide groove structure, which satisfies the fixing function while also taking into account the requirements for leak-proof sealing, vibration damping, or guiding positioning. The first connector 500 can be made of stainless steel, galvanized steel, engineering plastics or corrosion-resistant alloys to adapt to long-term immersion, moisture and corrosion conditions in sewage environments; when it is necessary to improve the sealing performance, rubber gaskets, silicone rings or elastic gaskets can be set at the contact points between the connector and the outer shell 311 or the housing 100 to reduce vibration transmission and compensate for installation tolerances.

[0074] When the system starts, the housing 311 of the level detection element 300 is installed at a predetermined position on the inner wall of the tank 100 under the fixing and limiting action of the first connector 500. The housing 311 can maintain its axial direction and height position without deviation during changes in sewage level, so that the trigger element 312 inside the housing 311 is always in a working state that can accurately respond to changes in liquid level. As the sewage in the tank 100 gradually rises, the buoyancy or mechanical displacement formed by the liquid acting on the housing 311 and the trigger element 312 is transmitted to the control component 400 through the internal structure of the housing 311. The control component 400 executes the corresponding sewage pump 200 start-stop logic accordingly. Since the first connector 500 provides reliable support for the housing 311, the housing 311 will not loosen, tilt or fall off due to liquid flow impact, device vibration or long-term cyclic operation. The correspondence between the trigger element 312 and the preset liquid level is kept stable, thereby reducing liquid level detection errors and false triggering.

[0075] At the same time, the first connector 500 can also play a role in vibration reduction and buffering, reducing the impact of the start-up and shutdown of the sewage pump 200 or liquid surging on the liquid level detection structure, so as to make the liquid level signal transmission continuous and reliable.

[0076] Based on the above structural fit, the first connector 500 can improve the installation firmness and long-term operational reliability of the liquid level detection element 300, and enhance the accuracy and stability of multi-level liquid level control. It also avoids pump control deviations caused by changes in the position of the liquid level detection element 300, thus helping the sewage lifting device maintain stable operation under fluctuating conditions. It should be understood that the above example is merely illustrative and not limiting. Without departing from the technical concept of this application, the specific form, installation method, and material selection of the first connector 500 can be adjusted according to the actual structure of the housing 100 and the usage environment.

[0077] Reference Figures 1 to 4 As shown, based on the aforementioned embodiment, the tank 100 is further provided with a drain outlet 110, which is used to discharge domestic sewage from the tank 100.

[0078] In one possible embodiment, the drain outlet 110 is a liquid outlet channel or outflow interface provided on the tank 100, used to discharge pressurized domestic sewage from the tank 100 into the subsequent discharge pipeline when the sewage pump 200 is working, thereby completing the sewage lifting and discharge process. When the liquid level in the tank 100 rises and meets the pump start-up conditions of the control component 400, the sewage pump 200 pumps the sewage in the tank 100 to the drain outlet 110, through which it enters the upper-level pipeline network or subsequent treatment equipment.

[0079] Based on the above analysis, it is clear that the drain outlet 110, serving as the interface between the housing 100 and external pipelines, should be positioned to shorten the flow path from the pump outlet to the discharge channel, thereby reducing local resistance and energy loss, and minimizing sewage retention. Furthermore, the drain outlet 110 can be configured with a circular threaded opening, flange, or quick-connect fitting, depending on the installation conditions and pipeline connection method. The drain outlet 110 can be integrally formed with the housing 100, or it can be embedded in the housing 100 wall panel using stainless steel inserts, plastic connectors, or rubber sealing seats, to accommodate the processing and pressure requirements of housings 100 made of different materials. It should be understood that the above examples are merely illustrative and not limiting.

[0080] When the system starts, domestic sewage in the tank 100 collects under gravity. The level detection device 300 feeds back the level information to the control component 400 as the level changes. The control component 400 controls the start and stop of at least two sewage pumps 200 according to a preset hierarchical logic. The sewage output by the sewage pumps 200 is discharged to the subsequent drainage system through the drain outlet 110 on the tank 100. Since the drain outlet 110 forms a continuous outflow channel with the pump outlet and external pipelines, the sewage can quickly leave the tank 100 after being pressurized, avoiding excessive retention time in the tank 100. Based on the above working process, it can be seen that the setting of the drain outlet 110 can improve the discharge continuity and pipeline adaptability of the sewage lifting device, facilitate the docking with external drainage systems in different scenarios, and help maintain the stability of the liquid level inside the tank 100. It should be understood that the above example is only for demonstration and not a limitation. Without departing from the concept of this application, the specific location, diameter, and connection structure of the drain outlet 110 can be adjusted according to the installation environment, pump type, and pipeline layout.

[0081] Reference Figures 1 to 3 As shown, in one possible implementation, a effluent assembly 600 is also included, which is connected to at least two sewage pumps 200 and to a drain outlet 110.

[0082] In this application, the effluent assembly 600 is a pipeline connection component used to collect and guide the discharge flow of at least two sewage pumps 200 to the drain outlet 110, forming a continuous conveying channel between the sewage pumps 200 and the external discharge pipeline of the tank 100. The function of the effluent assembly 600 is to combine, unidirectionally discharge, and connect the sewage output from at least two sewage pumps 200, so that when different sewage pumps 200 are started and stopped in stages according to liquid level, the effluent from the tank 100 can be stably sent out through the same discharge path, thereby avoiding problems such as turbulent flow, local backflow, or scattered pipeline connections that occur when the pump outlet is directly discharged.

[0083] The effluent assembly 600 can be installed on the outlet side of at least two sewage pumps 200, located between the drain outlet 110 and the sewage pumps 200. The at least two sewage pumps 200 can be connected to the effluent assembly 600 individually, or their outlets can be first merged into a common manifold before connecting to the effluent assembly 600, and then connected to the drain outlet 110, thus forming a continuous flow channel from the pumping end to the discharge end. Based on this structure, the effluent assembly 600 undertakes sewage transport and flow direction control during operation. After the effluent assembly 600 is coordinated with the at least two sewage pumps 200, sewage at each pumping stage can be discharged orderly through a unified drain outlet 110, thereby stabilizing the discharge path of the device, clarifying the pipeline layout, reducing the risk of backflow, improving the collaborative efficiency of the sewage pumps 200, and enhancing the overall reliability of the machine. It should be understood that the above examples are for demonstration purposes only and are not limiting. The specific structure, connection form and material selection of the water outlet component 600 can be replaced with equivalent ones according to the actual installation conditions, pump parameters and drainage conditions, as long as the connection and confluence discharge between at least two sewage pumps 200 and the drain outlet 110 can be achieved.

[0084] Reference Figure 1 and Figure 2 As shown, in one possible implementation, the water outlet assembly 600 includes a check valve 610, a water outlet pipe 620, and a discharge valve 630, which are connected in sequence. The check valve 610 is connected to the sewage pump 200, and the discharge valve 630 is connected to the drain outlet 110.

[0085] The effluent assembly 600 is used to form a one-way discharge path for sewage from the sewage pump 200 to the drain outlet 110. The check valve 610 is a one-way valve installed on the pump outlet side, the effluent pipe 620 is a pipe for conveying pressurized sewage, and the discharge valve 630 is an opening and closing control valve installed on the drain end. The function of the effluent assembly 600 is to form a stable discharge path when the sewage pump 200 is working, and to prevent sewage in the pipeline from flowing back to the pump body or the housing 100 when the sewage pump 200 is stopped. At the same time, it facilitates isolation control of the drain side when it is under maintenance, repair or when it is necessary to cut off the discharge path.

[0086] Specifically, the check valve 610 is directly installed at the outlet of the sewage pump 200. The inlet end of the check valve 610 is sealed and connected to the outlet interface of the sewage pump 200. The outlet end of the check valve 610 is connected to one end of the outlet pipe 620. The other end of the outlet pipe 620 is then connected to the inlet end of the discharge valve 630. The outlet end of the discharge valve 630 is connected to the drain outlet 110, so that the three are connected in series along the sewage flow direction to form a continuous conveying link.

[0087] The check valve 610 can be a swing check valve 610, a lift check valve 610, or a ball check valve 610. The outlet pipe 620 can be a rigid pipe, a flexible pipe, or a corrugated pipe. In one possible embodiment, the pipe body of the outlet pipe 620 can be made of PVC (Polyvinyl Chloride), PP (Polypropylene), PE (Polyethylene), or stainless steel to balance corrosion resistance, ease of installation, and a certain structural strength. The discharge valve 630 can be a ball valve, a gate valve, a butterfly valve, or a globe valve. In terms of size and proportion, the diameters of the check valve 610, the outlet pipe 620, and the discharge valve 630 match or are substantially the same as the outlet diameter of the sewage pump 200 and the interface diameter of the drain outlet 110 to avoid additional resistance and impurity accumulation caused by local diameter reduction.

[0088] During operation, when the sewage pump 200 starts, the sewage in the pump is pushed into the outlet pipe 620 through the check valve 610 and flows to the discharge valve 630. When the discharge valve 630 is open, it guides the sewage into the drain outlet 110 for discharge. When the sewage pump 200 stops running, the check valve 610 automatically closes under the reverse pressure of the pipeline, blocking the backflow of sewage in the pipe. The discharge valve 630 can be kept open to maintain discharge continuity according to control requirements, or closed to cut off the drainage path when maintenance is required. Thus, the effluent assembly 600 has the functions of unidirectional backflow prevention, stable delivery, and easy isolation maintenance.

[0089] Based on the above structure, it can be seen that the check valve 610 can reduce the risk of backflow after the sewage pump 200 stops when at least two sewage pumps 200 are operating in coordination, reduce the impact of liquid level fluctuations on the pump body, and make the on / off control of the discharge pump clear, thereby improving the operational stability, pipeline safety, and convenience of later maintenance of the sewage lifting device. It should be understood that the above example is only for demonstration and not a limitation. Without departing from the technical concept of this application, the specific models, material combinations, and installation methods of the check valve 610, the outlet pipe 620, and the discharge valve 630 can be adjusted accordingly.

[0090] Reference Figure 3 and Figure 4 As shown, in one possible implementation, the tank 100 is provided with at least two water inlets 120, which are used to discharge domestic sewage into the tank 100; at least two water inlets 120 are provided on two sides of the tank 100 or one end of the top of the tank 100, and the drain outlet 110 is provided on the top of the tank 100.

[0091] In one possible embodiment, the inlet 120 is a liquid inlet interface located on the wall of the tank 100, used to connect with an external domestic sewage pipe and introduce domestic sewage into the tank 100; the outlet 110 is a liquid outlet interface located on the top of the tank 100, used to connect with an external water outlet pipe 620 and discharge sewage from the tank 100 upwards. When at least two inlets 120 are arranged on two sides of the tank 100, it can accommodate water pipes from different directions, making it easier to lay pipes in scenarios where installation space is limited, such as basements, sunken bathrooms, or equipment mezzanines.

[0092] When the inlet 120 is located at one end of the top of the tank 100, it facilitates connection with the drainage branch pipe flowing in from above or to the side, reducing pipe backflow. The outlet 110 is located at the top of the tank 100, allowing the outlet pipe 620 to be directly connected to the upper main pipe or riser pipe, thereby reducing the possibility of low-lying sludge accumulation outside the tank 100 in the outlet section and facilitating the timely entry of pumped sewage into the subsequent discharge system.

[0093] The inlet 120 and the housing 100 can be connected by integral molding or separate installation. For example, the inlet 120 can be any one or more of the following forms: a circular pipe fitting, a flange interface, a socket joint, or a threaded interface. A sealing ring, a gasket, or an adhesive layer can be provided at the interface to ensure the sealing reliability during long-term use. The drain outlet 110 can also adopt a similar pipe connection structure and can be configured as a vertical opening, an angled opening, or an outlet structure with a short connecting pipe, depending on the installation space at the top of the housing 100.

[0094] The number of inlets 120 is at least two, and sufficient spacing is preferably maintained between multiple inlets 120 to avoid interference with adjacent pipeline installations and facilitate maintenance operations. The diameter of the drain outlet 110 is generally not less than the diameter of a single inlet 120, or is determined based on the total discharge capacity and system head of at least two sewage pumps 200 to ensure smooth discharge of the pumped flow. It should be understood that the above examples are for illustrative purposes only and are not limiting. The specific shape, connection method, and installation direction of the inlets 120 and drain outlets 110 can be adjusted according to the structure of the housing 100 and the on-site pipeline conditions.

[0095] In this application, the setting of at least two inlets 120 allows domestic sewage to enter the tank 100 from different directions. In the case of inconsistent water flow direction or multiple branch flow, it can reduce the detour length of the external pipe network and reduce the difficulty of pipe laying. The drain outlet 110 is located at the top of the tank 100, which makes it easier for the lifted sewage to enter the upper outlet pipe 620 under the combined action of gravity and pump pressure, and forms a more stable discharge channel on the outlet side inside the tank 100.

[0096] When the system is running, domestic sewage enters the tank 100 through at least two inlets 120 and collects inside the tank 100. The control component 400 starts the corresponding sewage pump 200 to lift and discharge the sewage based on the signal from the liquid level detection element 300. The sewage is discharged through the drain outlet 110 located at the top and then enters the subsequent pipe network or treatment unit. Since the inlets 120 can be distributed on the side or top of the tank 100, while the outlets are concentrated at the top, the inlet and outlet paths are spatially separated, which can reduce interference between inlet and outlet water, reduce the probability of backflow, and make the flow distribution inside the tank 100 clearer. This is beneficial to improving the adaptability and operational stability of the sewage lifting device in complex installation environments.

[0097] Reference Figure 1 As shown, based on the aforementioned embodiments, the control component 400 further includes a controller 410 and a control panel 420. The control panel 420 is connected to the controller 410, the controller 410 is connected to the sewage pump 200, and the controller 410 is connected to at least three liquid level detection elements 300.

[0098] In one possible embodiment, the controller 410 is a control unit for receiving liquid level detection signals and outputting pump control commands, and the control panel 420 is an operating unit for displaying operating status, setting parameters, and providing human-machine interaction. The controller 410 can perform logical judgments on the liquid level information from the first detector 310, the third detector 330, and the second detector 320, and output start-stop control signals to at least two sewage pumps 200 in combination with preset start-stop thresholds, thereby realizing graded pumping control; the control panel 420 is used to display the current liquid level status, the operating status of at least two sewage pumps 200, and fault alarm information to the operator, and allows the operator to set or switch the start-stop liquid level, delay parameters, alarm thresholds, or manual / automatic modes according to the actual usage scenario, so as to improve the automation level of the device and the on-site visual management capability.

[0099] The control panel 420 is located on the outside of the control box door, the surface of the equipment housing 311, or on the centralized control terminal for easy observation and operation. The control panel 420 and the controller 410 can establish an interactive path through wires 510, cables, communication buses, or wireless communication modules, so that the controller 410 can receive operation commands and feed back operating information to the control panel 420.

[0100] The controller 410 can be structurally a PLC module, a microcontroller 410 motherboard, a relay control board, or an integrated intelligent control unit. The visible area of ​​the control panel 420 can be coordinated with the size of the control box door. The display window, button layout, or touch area of ​​the control panel 420 should meet the requirements for on-site reading and protection against misoperation. It should be understood that the above examples are for demonstration purposes only and are not limiting. The controller 410 can also be replaced by a distributed control module, a remote server control unit, or an intelligent gateway. The control panel 420 can also be replaced by a mobile terminal interface, a host computer software interface, or a simplified panel without a display. As long as it can realize the reception of liquid level detection signals, the output control of the sewage pump 200, and the display and interaction of the operating status, it falls within the protection scope of this application.

[0101] When the system starts, the controller 410 first initializes and collects the status of at least three liquid level detectors 300, and displays the current status of the equipment as automatic operation, standby or maintenance through the control panel 420. As the sewage level in the tank 100 changes, the controller 410 continuously receives and compares the liquid level information from at least three liquid level detectors 300. When the liquid level reaches the preset graded control range, it outputs the corresponding pump control command so that the sewage pump 200 performs linkage actions such as shutting down, single pump starting or full pump starting according to different stages of liquid level rise. The control panel 420 simultaneously displays the current liquid level level, the number of sewage pumps 200 that have been put into operation, and whether there are alarms for over-liquid level, under-liquid level or pump failure.

[0102] Because a direct and stable input-output control network is formed between the controller 410, the sewage pump 200, and the level detection device 300, and the control panel 420 provides operators with channels for parameter setting, status viewing, and manual intervention, the control component 400 in this application can accurately schedule the operation of the pump group when the sewage discharge flow rate fluctuates significantly. This reduces frequent start-stop or discharge lag caused by fixed threshold control, while also making the level status expression clearer, facilitating on-site maintenance and remote management. Therefore, this design makes the control logic of the device more intuitive, adjustable, and easy to maintain, thereby improving the adaptability of the sewage lifting device under complex operating conditions.

[0103] Reference Figure 1 As shown, in one possible implementation, at least two wires 510 are also included, with the controller 410 connected to the sewage pump 200 via the wires 510, and the controller 410 connected to the liquid level detection element 300 via the wires 510.

[0104] In one possible embodiment, the wire 510 is an electrical connection medium for transmitting power, control signals, or detection signals. The function of the wire 510 is to establish a stable drive circuit between the controller 410 and the sewage pump 200, and to establish a signal circuit between the controller 410 and the liquid level detection device 300, so that the controller 410 can issue start and stop control commands in a timely manner based on the liquid level information output by the liquid level detection device 300, and drive the sewage pump 200 to perform corresponding actions according to the preset liquid level threshold.

[0105] The wire 510 is laid between the controller 410, the sewage pump 200 and the liquid level detection device 300, and can be laid along the inner wall of the housing 100, the wire trough or the sealed wire hole to avoid direct contact between the wire 510 and the sewage, and at the same time reduce the risk of mechanical damage caused by water flow, solid particle friction or maintenance operations.

[0106] The conductor 510 can be made of multi-core copper wire, shielded wire, or water-resistant cable. The wire diameter of the power transmission part is larger than that of the signal transmission part to meet the power requirements of the large operating current of the sewage pump 200. The liquid level detection signal line can be selected with a smaller wire diameter and used in conjunction with a shielding layer according to the transmission distance and anti-interference requirements. The outer sheath of the conductor 510 can be made of PVC, rubber, silicone or polyurethane materials to take into account flexibility, water resistance and corrosion resistance.

[0107] In this application, the conductor 510 serves as the basic component for electrical connection and signal transmission. It can accurately deliver the control commands from the controller 410 to the sewage pump 200, and simultaneously provide stable feedback of the status information from the level detection element 300 to the controller 410, thus providing a feasible communication basis for multi-level level judgment and multi-pump staged start-stop control. Since sewage lifting devices are typically in a humid, intermittently vibrating working environment that may be accompanied by dirt corrosion, the insulation layer, waterproof connectors, and wiring path of the conductor 510 directly affect the long-term stability of the system. Therefore, by appropriately selecting water-resistant cables, shielded wires, or wire harnesses with protective sheaths, the probability of moisture-induced short circuits, signal attenuation, and false triggering can be reduced.

[0108] Based on the above analysis, it can be seen that the wiring 510 establishes an electrical connection between the controller 410, the sewage pump 200, and the liquid level detection element 300. This ensures that changes in liquid level can be promptly translated into control actions, and the sewage pump 200 can smoothly start and stop according to the set logic. This improves the responsiveness, control accuracy, and operational stability of the sewage lifting device under fluctuating operating conditions, and facilitates subsequent maintenance and component replacement. It should be understood that the above example is merely illustrative and not limiting. Without departing from the technical concept of this application, the quantity, specifications, materials, and connection methods of the wiring 510 can be equivalently adjusted according to actual engineering needs.

[0109] Reference Figures 1 to 3As shown, based on the aforementioned embodiments, a drain valve 130 is further included, which is disposed at the bottom of the housing 100.

[0110] The drain valve 130 can be understood as a valve assembly used to open or close the discharge channel at the bottom of the tank 100. The function of the drain valve 130 is to cooperate with the daily operation, maintenance and repair of the sewage lifting device and the cleaning of the tank 100, so that the residual sewage, sediment or floating impurities formed at the bottom of the tank 100 can be discharged through the bottom channel when needed, thereby reducing the adverse effects of bottom sludge accumulation on the accuracy of liquid level detection, the reliability of pump start-up and shutdown and the sanitary condition of the tank 100.

[0111] The drain valve 130 is located at or near the lowest point of the bottom of the tank 100 and is connected to the bottom space inside the tank 100. When the valve is open, the residual liquid at the bottom can flow out naturally under the action of gravity. When the valve is closed, the bottom channel of the tank 100 is kept closed to maintain the normal dirt collection and lifting function of the tank 100.

[0112] In one possible embodiment, the drain valve 130 may be in the form of a manual ball valve, gate valve, plug valve, or drain valve; in an exemplary embodiment, the drain valve 130 may be equipped with a sealing gasket to improve the sealing performance in the closed state, and may be configured with a quick connector or anti-clogging filter screen according to the installation conditions to facilitate disassembly and maintenance and reduce the blockage of the discharge channel by solid particles.

[0113] The diameter of the drain valve 130 is typically matched to the drainage requirements at the bottom of the housing 100. The flow cross-section of the drain valve 130 can meet the requirements for rapid discharge of residual liquid and sediment, and is generally not smaller than the diameter of a conventional drain pipe. The length and dimensions of the valve body should match the installation and operating space below the bottom plate of the housing 100 to ensure convenient valve opening and closing and easy maintenance by maintenance personnel. It should be understood that the above example is for demonstration purposes only and is not a limitation. In actual applications, the drain valve 130 can be replaced with a bottom vent, a quick-release plug, an automatic drain valve, or an electrically controlled vent valve, etc., depending on structural needs, as long as it can achieve selective opening and closing of the discharge channel at the bottom of the housing 100.

[0114] When the system is started, the domestic sewage in the tank 100 gradually rises in level as it flows in. After the control component 400 detects the liquid level signals corresponding to different liquid level detectors 300, it manages the start and stop of the sewage pump 200 according to the preset hierarchical control logic. Meanwhile, the drain valve 130 located at the bottom of the tank 100 is kept closed during normal operation to prevent uncontrolled bottom leakage from affecting the sewage lifting process.

[0115] When the system needs to be cleaned, maintained, or the residual wastewater needs to be drained, the operator can open the drain valve 130 to allow the residual liquid and attached sediment at the bottom of the tank 100 to be discharged through the bottom channel under gravity, thereby reducing the impact of sludge accumulation and foreign matter retention on the internal environment of the tank 100.

[0116] Because the drain valve 130 is located at the lowest point of the tank 100, it can preferentially discharge impurities and residual liquid deposited at the bottom. This reduces the risk of odor, blockage, and corrosion caused by long-term retention of residual liquid in the tank 100, and minimizes interference from bottom contaminants on the sensitivity of the liquid level detection element 300. Therefore, the coordinated arrangement of the drain valve 130 and the bottom of the tank 100 enables the sewage lifting device to not only meet normal sewage collection and lifting functions, but also provides convenient emptying, easy maintenance, and improved operational stability. This helps extend the device's service life and improves the convenience of subsequent operation and maintenance management.

[0117] In addition to the above, to balance the air pressure inside the sealed enclosure 100 and ensure that the sewage pump 200 can pump water normally, a ventilation opening 140 is also provided on the enclosure 100 in this embodiment, such as... Figures 1 to 4 As shown. The vent 140 can be located on the top of the tank 100, next to the drain outlet 110. When the sewage lifting device is working, the tank 100 is sealed, and sewage continuously flows in, compressing the air inside the tank 100; when the sewage pump 200 pumps water, a negative pressure is formed inside. The vent 140 is connected to the atmosphere, balancing the air pressure inside and outside the tank 100, allowing the sewage inside the tank 100 to be pressurized and discharged by the sewage pump 200.

[0118] The technical solutions of this application have been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it is readily understood by those skilled in the art that the scope of protection of this application is obviously not limited to these specific embodiments. The above embodiments are only used to illustrate the technical solutions of this application and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A sewage lifting device, characterized in that, include: Box (100); At least two sewage pumps (200) are mounted on the tank (100); At least three liquid level detection elements (300) are provided, including a first detection element (310), a second detection element (320) and a third detection element (330). The liquid level detection elements (300) are used to detect the liquid level inside the tank (100). The at least three liquid level detection elements (300) are arranged sequentially at intervals along the height direction of the tank (100). The first detection element (310) is set at a height close to the bottom of the tank (100), and the second detection element (320) is set at a height close to the top of the tank (100). A control component (400) is connected to the sewage pump (200) and at least three level detection devices (300). The control component (400) is configured to control at least two of the sewage pumps (200) to shut down when the first detection device (310) is triggered, control one of the sewage pumps (200) to turn on when the third detection device (330) is triggered, and control all of the sewage pumps (200) to turn on when the second detection device (320) is triggered.

2. The sewage lifting device according to claim 1, characterized in that, At least one of the first detection element (310), the second detection element (320) and the third detection element (330) includes a housing (311) and a trigger element (312) disposed within the housing (311), the housing (311) being connected to the inner wall of the housing (100); The trigger (312) is configured such that when the water level in the tank (100) reaches the outer shell (311), the outer shell (311) moves with the water level to be triggered by the outer shell (311).

3. The sewage lifting device according to claim 2, characterized in that, It also includes a first connector (500), through which the outer shell (311) is connected to the inner wall of the housing (100).

4. The sewage lifting device according to claim 3, characterized in that, The box (100) is also provided with a drain outlet (110), which is used to discharge domestic sewage from the box (100).

5. The sewage lifting device according to claim 4, characterized in that, It also includes a effluent assembly (600) connected to at least two of the sewage pumps (200) and connected to the drain outlet (110).

6. The sewage lifting device according to claim 5, characterized in that, The water outlet assembly (600) includes a check valve (610), a water outlet pipe (620), and a discharge valve (630). The check valve (610), the water outlet pipe (620), and the discharge valve (630) are connected in sequence. The check valve (610) is connected to the sewage pump (200), and the discharge valve (630) is connected to the drain outlet (110).

7. The sewage lifting device according to claim 5, characterized in that, The tank (100) is provided with at least two water inlets (120), which are used to discharge domestic sewage into the tank (100). At least two of the water inlets (120) are provided on two sides of the tank (100) or one end of the top of the tank (100), and the drain outlet (110) is provided on the top of the tank (100).

8. The sewage lifting device according to any one of claims 1-7, characterized in that, The control component (400) includes a controller (410) and a control panel (420), the control panel (420) being connected to the controller (410), the controller (410) being connected to the sewage pump (200), and the controller (410) being connected to at least three of the liquid level detection devices (300).

9. The sewage lifting device according to claim 8, characterized in that, It also includes at least two wires (510), the controller (410) is connected to the sewage pump (200) through the wires (510), and the controller (410) is connected to the liquid level detection device (300) through the wires (510).

10. The sewage lifting device according to claim 8, characterized in that, It also includes a drain valve (130), which is located at the bottom of the housing (100).

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