Sewage lifting device capable of preventing backflow

Abstract

The application discloses sewage lifting device capable of preventing backflow, wherein the sewage lifting device capable of preventing backflow comprises a device body, a plurality of flow blocking components, a crushing component and a lifting component, the device body has a sewage collecting space and a plurality of sewage inlet channels in communication with the sewage collecting space, the plurality of sewage inlet channels are respectively used for introducing sewage into the sewage collecting space, the plurality of flow blocking components correspond to the plurality of sewage inlet channels respectively, the plurality of flow blocking components are respectively used for preventing the sewage in the sewage collecting space from flowing back into the corresponding sewage inlet channels to cause backflow, the crushing component and the lifting component are both arranged in the sewage collecting space, the crushing component is used for crushing sundries in the sewage in the sewage collecting space, and the lifting component is used for centrally pumping and discharging the sewage in the sewage collecting space and the crushed sundries in the sewage from the sewage collecting space.

Description

Technical Field

[0001] This application relates to the field of wastewater treatment equipment technology, and more particularly to a wastewater lifting device that can prevent backflow. Background Technology

[0002] Sewage lifting devices are sewage discharge equipment used in places with poor sewage discharge conditions, such as basements and villas.

[0003] The sewage lifting device has a sewage collection space and several inlets connected to the sewage collection space. Sewage generated in the site is discharged into the sewage collection space from multiple drain outlets through corresponding pipes and inlets. The sewage lifting device then uses a suction pump to pressurize the sewage in the sewage collection space and discharge it into the main sewage pipe in the site. This solves the problem that the sewage from the drain outlets cannot be discharged into the main sewage pipe by gravity due to insufficient water pressure in the site's sewage pipes.

[0004] Existing wastewater lifting systems have several inlets connected to the wastewater collection space. According to the principle of communicating vessels, wastewater from one outlet, after flowing into the collection space through its corresponding inlet via a corresponding pipe, can backflow from another inlet into another corresponding pipe, and then backflow from another outlet back into the site. This backflow of wastewater from the collection space not only pollutes the environment but also poses public health problems. Utility Model Content

[0005] To address the aforementioned technical problems and achieve at least one advantage of this application, this application provides a sewage lifting device that prevents backflow, wherein the sewage lifting device that prevents backflow includes:

[0006] The device body has a sludge collection space and several sludge inlet channels. The several sludge inlet channels are respectively connected to the sludge collection space and are used to centrally introduce sewage into the sludge collection space.

[0007] A plurality of flow-blocking components, each of the plurality of flow-blocking components comprising:

[0008] A flip-up mounting body, wherein several flip-up mounting bodies are respectively disposed on the inner wall of the sewage collection space in a manner close to the corresponding sewage inlet channel;

[0009] A flip connector, one end of each of the flip connectors is rotatably disposed on the corresponding flip mounting body, so that the axial direction of the flip connectors when they rotate is defined as the flip axis.

[0010] A flow-blocking body, wherein a plurality of flow-blocking bodies are respectively disposed at the other end of the corresponding flip-connector away from the corresponding flip-mounting body, and the connection points of the plurality of sewage inlet channels with the sewage collection space are respectively located on the path of the plurality of flow-blocking bodies rotating around the corresponding flip-axis through the corresponding flip-connector, the plurality of flow-blocking bodies are respectively adapted to the connection points of the plurality of sewage inlet channels with the sewage collection space, and the plurality of flow-blocking bodies are respectively used to block the connection points of the plurality of sewage inlet channels with the sewage collection space;

[0011] At least one voltage stabilizing unit, and several voltage stabilizing units each having a voltage stabilizing part, wherein the voltage stabilizing parts of several voltage stabilizing units are respectively kept compressed and elastically deformable and pressed against the corresponding flipping connector around the corresponding flipping axis, and the rotation directions of several flow-blocking bodies respectively rotating around the corresponding flipping axis and blocking the corresponding sewage inlet channel are respectively kept in the same direction as the pressing direction of the voltage stabilizing parts of several voltage stabilizing units around the flipping axis, and the several voltage stabilizing parts are respectively kept compressed and pressed against the corresponding flipping connector;

[0012] A pulverizing component is disposed in the sludge collection space and is used to pulverize debris in the sewage within the sludge collection space;

[0013] A lifting component is disposed in the sludge collection space, and the lifting component is used to centrally pump the sewage and crushed debris in the sewage from the sludge collection space to the outside.

[0014] According to one embodiment of this application, a plurality of the flip mounting bodies respectively form flip holes along the flip axis, and a plurality of the flip connectors respectively form flip shaft portions along the flip axis that are adapted to the corresponding flip holes. The flip shaft portions of the plurality of flip connectors are respectively disposed in the flip holes of the corresponding flip mounting bodies in a manner that allows them to rotatably enter the corresponding flip holes.

[0015] According to one embodiment of this application, the voltage stabilizing units of the plurality of flow-blocking components are all implemented to include torsion springs, and the voltage stabilizing units of the plurality of flow-blocking components are all implemented as two, the rotating portions of the two voltage stabilizing units of the plurality of flow-blocking components are sleeved on the corresponding flipping shaft portions, the two voltage stabilizing units of the plurality of flow-blocking components are respectively kept compressed, and the two voltage stabilizing units of the plurality of flow-blocking components respectively form two leads that can release torque coaxially in opposite directions, the two distant leads of the two voltage stabilizing units of the plurality of flow-blocking components are respectively disposed on the corresponding flipping mounting body, the two close leads of the two voltage stabilizing units of the plurality of flow-blocking components are respectively defined as voltage stabilizing portions, the two voltage stabilizing portions of the two voltage stabilizing units of the plurality of flow-blocking components are connected to each other and keep pressing against the corresponding flipping connector.

[0016] According to one embodiment of this application, a plurality of the flip connectors are respectively provided with through slots, and two voltage stabilizing parts of two interconnected voltage stabilizing units of a plurality of flow blocking components are inserted into the corresponding through slots and press against the inner wall of the corresponding through slots to keep pressing against the flip connectors.

[0017] According to one embodiment of this application, the thickness of a plurality of the flow-blocking bodies gradually decreases from near the flip-over connector to away from the flip-over connector along the corresponding sewage inlet channel extension direction.

[0018] According to one embodiment of this application, the main body of the device includes a sludge collection tank, a tank cover, and a water level sensor. The sludge collection tank has a sludge collection space, a plurality of sludge inlet channels, and a tank opening. The tank opening is formed at the upper part of the sludge collection tank in the direction of gravity and is connected to the sludge collection space. The tank cover is adapted to the tank opening and is disposed at the tank opening of the sludge collection tank. The tank cover is used to close the tank opening and has a ventilation channel connected to the sludge collection space.

[0019] According to one embodiment of this application, the main body of the device further includes a water level sensor, which is disposed on the tank cover and is used to monitor the sewage level in the sewage collection space in real time. The lifting component includes a lifting drive and a discharge pipe. The lifting drive is disposed in the sewage collection space and is used to suck up the sewage and crushed debris in the sewage in the sewage collection space. The lifting drive has a suction port and a discharge port. The suction port of the lifting drive is kept in communication with the sewage collection space, and the discharge port of the lifting drive is connected to the outside of the main body of the device through the discharge pipe. The water level sensor is electrically connected to the lifting drive.

[0020] According to one embodiment of this application, the sewage lifting device for preventing backflow further includes a floating seal assembly. The floating seal assembly includes a floating mounting component, a rotating component, and a floating seal component. The floating mounting component is disposed on the tank cover and is located near the ventilation channel. The rotating component includes a rotating part and a floating connecting part. One end of the floating connecting part is rotatably disposed on the floating mounting component through the rotating part. The floating seal component is disposed at the other end of the floating connecting part away from the rotating part, such that it can rotate around the rotating part via the floating connecting part and abut against and move away from the port of the ventilation channel. The portion of the floating seal component corresponding to the port of the ventilation channel is defined as a closed portion. The closed portion is adapted to the port of the ventilation channel. The closed portion can elastically deform and block the ventilation channel when it abuts against the port of the ventilation channel. The floating seal component has a cavity.

[0021] According to one embodiment of this application, the floating sealing member includes a floating body and a floating closure member. The floating body is disposed at the other end of the floating connecting portion away from the rotating portion. The floating body has the cavity and an opening communicating with the cavity. The floating closure member is disposed on the floating body. The floating closure member is disposed at the opening of the floating body in a manner that can close the opening. The end of the floating closure member that rotates about the rotating portion about the axis via the floating body and the floating connecting portion and abuts against and is away from the venting channel port is defined as the closure portion.

[0022] According to one embodiment of this application, the floating mounting member forms a pivot hole, and the rotating part is disposed in the pivot hole in a manner that allows it to rotatably reside within the pivot hole. The rotating member further includes a raised abutment, one end of which is connected to the end of the floating connecting part near the rotating part, and the other end of which extends in a direction away from the floating connecting part. The floating mounting member has a stop portion, which is located on the movement path of the raised abutment when the floating connecting part drives the raised abutment to rotate around the rotating part as an axis and causes the sealing part of the floating sealing member to move away from the vent port. The stop portion is used to stop the raised abutment. Attached Figure Description

[0023] Figure 1 A perspective view of a preferred embodiment of this application is shown.

[0024] Figure 2 This is a schematic cross-sectional view of a preferred embodiment of the present application.

[0025] Figure 3 It shows Figure 2 A magnified view of a portion of point A in the diagram.

[0026] Figure 4 It shows Figure 2 A magnified view of a portion of point B in the diagram.

[0027] Figure 5 A cross-sectional view of a preferred embodiment of this application is shown.

[0028] Figure 6 It shows Figure 5 A magnified view of a portion of point C.

[0029] Figure 7 An exploded view of a preferred embodiment of this application is shown.

[0030] Figure 8 It shows Figure 7 A magnified view of a portion of point D in the middle.

[0031] Figure 9 It shows Figure 7 A magnified view of a portion of point E in the diagram.

[0032] Figure 10 A perspective view of some components in a preferred embodiment of this application is shown.

[0033] Figure 11 A perspective view of another component in a preferred embodiment of this application is shown.

[0034] Figure 12 A perspective view of the flow-blocking assembly described in a preferred embodiment of this application is shown. Detailed Implementation

[0035] The following description is intended to disclose this application and enable those skilled in the art to implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art. The basic principles of this application defined in the following description can be applied to other embodiments, modifications, improvements, equivalents, and other technical solutions that do not depart from the spirit and scope of this application.

[0036] Those skilled in the art should understand that, in the disclosure of this application, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limitations on this application.

[0037] It is understood that the term "a" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element can be multiple, and the term "a" should not be understood as a limitation on the number.

[0038] refer to Figures 1 to 12 A preferred embodiment of the wastewater lifting device that prevents backflow according to this application will be described in detail below, wherein the wastewater lifting device that prevents backflow includes a device body 10, a plurality of flow-blocking components 20, a crushing component 30 and a lifting component 40.

[0039] Specifically, the main body 10 of the device has a sewage collection space 1101 and a plurality of sewage inlet channels 1102. The plurality of sewage inlet channels 1102 are respectively connected to the sewage collection space 1101 so as to centrally introduce sewage into the sewage collection space 1101 through the plurality of sewage inlet channels 1102.

[0040] Each of the aforementioned flow-blocking components 20 corresponds to one of the aforementioned sewage inlet channels 1102.

[0041] Each of the aforementioned flow-blocking components 20 includes a flip-mounting body 21, a flip-connector 22, a flow-blocking body 23, and at least one voltage stabilizing unit 24.

[0042] Several of the aforementioned flip-mounted main bodies 21 are disposed on the inner wall of the sewage collection space 1101, and several of the aforementioned flip-mounted main bodies 21 are respectively close to the corresponding sewage inlet channel 1102.

[0043] One end of each of the plurality of flip connectors 22 is rotatably disposed on the corresponding flip mounting body 21, so that the axial direction of the plurality of flip connectors 22 when they rotate is defined as a flip axis.

[0044] A plurality of the flow-blocking bodies 23 are respectively disposed at the other end of the corresponding flip-up connector 22 away from the corresponding flip-up mounting body 21. The communication points of the plurality of sewage inlet channels 1102 with the sewage collection space 1101 are respectively located on the path of the plurality of flow-blocking bodies 23 rotating around the corresponding flip-up axis through the corresponding flip-up connector 22, and the plurality of flow-blocking bodies 23 are respectively adapted to the communication points of the plurality of sewage inlet channels 1102 with the sewage collection space 1101, so as to block the communication points of the plurality of sewage inlet channels 1102 with the sewage collection space 1101 by the plurality of flow-blocking bodies 23 respectively.

[0045] Each of the plurality of pressure stabilizing units 24 has a pressure stabilizing part 241. The pressure stabilizing parts 241 of the plurality of pressure stabilizing units 24 are kept compressed and elastically deformable, pressing against the corresponding flipping connector 22 about the corresponding flipping axis. The rotation directions of the plurality of flow-blocking bodies 23 about the corresponding flipping axis and blocking the corresponding sewage inlet channel 1102 are respectively kept in the same direction as the pressing direction of the pressure stabilizing parts 241 of the plurality of pressure stabilizing units 24 about the flipping axis. By the plurality of pressure stabilizing parts 241 pressing against the corresponding flipping connector 22 in a compressed manner, the corresponding flow-blocking body 23 is stabilized at the connection between the corresponding sewage inlet channel 1102 and the sewage collection space 1101, thereby stably blocking the connection between the plurality of sewage inlet channels 1102 and the sewage collection space 1101.

[0046] The crushing component 30 is located in the sludge collection space 1101, and the crushing component 30 is used to crush the debris in the sewage in the sludge collection space 1101.

[0047] The lifting component 40 is disposed in the sludge collection space 1101, and the lifting component 40 is used to centrally pump the sewage and crushed debris in the sewage from the sludge collection space 1101 to the outside.

[0048] It is understood that when sewage is introduced into the sewage collection space 1101 through at least one of the sewage inlet channels 1102, the corresponding flow-blocking body 23 will be impacted and rotated around the flipping axis by the corresponding flipping connector 22 to move away from the connection between the corresponding sewage inlet channel 1102 and the sewage collection space 1101, thereby allowing at least one of the sewage inlet channels 1102 to smoothly introduce sewage into the sewage collection space 1101. At the same time, the pressure stabilizing part 241 of the corresponding pressure stabilizing unit 24 will be compressed and undergo elastic deformation.

[0049] Furthermore, under the action of the crushing component 30, the debris in the sewage in the sewage collection space 1101 will be crushed. At the same time, under the action of the lifting component 40, the sewage and debris in the sewage in the sewage collection space 1101 will be continuously concentrated and discharged, so that at least one of the sewage inlet channels 1102 can continuously introduce sewage into the sewage collection space 1101.

[0050] It is worth mentioning that when at least one of the other sewage inlet channels 1102 does not supply sewage into the sewage collection space 1101, the corresponding flow-blocking body 23 stably blocks the connection between the other at least one sewage inlet channel 1102 and the sewage collection space 1101, thereby preventing sewage in the sewage collection space 1101 from backflowing into the other at least one sewage inlet channel 1102 and causing backflow.

[0051] It should be noted that, as an example, the ends of the plurality of sewage inlet channels 1102 that are away from the sewage collection space 1101 can be connected to sewage outlets that need to discharge sewage, such as floor drains, washing machine outlets, and washbasin outlets, through pipes, thereby allowing sewage to be uniformly discharged into the sewage collection space 1101 through the plurality of sewage inlet channels 1102. Specifically, the height in the gravity direction of the sewage outlets that need to discharge sewage, such as floor drains, washing machine outlets, and washbasin outlets, are respectively connected to the corresponding sewage inlet channels 1102 through pipes is higher than the height of the sewage inlet channels 1102, so that the sewage outlets that need to discharge sewage, such as floor drains, washing machine outlets, and washbasin outlets, can smoothly discharge sewage into the sewage collection space 1101 through pipes and the corresponding sewage inlet channels 1102.

[0052] As a further example, the lifting component 40 can centrally pump the sewage and crushed debris in the sewage collection space 1101 from the sewage collection space 1101 into the main sewage pipe in the site, so as to achieve the purpose of pressurizing the main sewage pipe in the site to discharge sewage.

[0053] The presence of several of the aforementioned flow-blocking bodies 23 prevents sewage in the sewage collection space 1101 from flowing back into the sewage inlet channel 1102 and back into the premises, thus preventing sewage from polluting the premises environment and preventing public health problems from arising.

[0054] Preferably, each of the plurality of flip-mounting bodies 21 forms a flip hole 2101 along the flip-mounting axis. Each of the plurality of flip-mounting connectors 22 forms a flip shaft portion 221 along the flip-mounting axis that is adapted to the corresponding flip hole 2101. The flip shaft portions 221 of the plurality of flip-mounting connectors 22 are respectively disposed in the flip holes 2101 of the corresponding flip-mounting bodies 21 in a manner that allows them to rotatably rotate within the corresponding flip holes 2101. That is, the plurality of flip-mounting connectors 22 are rotatably disposed on the corresponding flip-mounting bodies 21 by rotating their flip shaft portions 221 within the corresponding flip holes 2101.

[0055] In this embodiment, preferably, all of the voltage regulating units 24 include torsion springs. Figure 12As shown, the rotating parts of several voltage regulating units 24 are respectively sleeved on the corresponding flip shaft portions 221. The voltage regulating units 24 are kept compressed, and each voltage regulating unit 24 forms two leads that can release torque coaxially in opposite directions. One lead of each voltage regulating unit 24 is disposed on the corresponding flip mounting body 21. The other lead of each voltage regulating unit 24 remains attached to the corresponding flip connector 22.

[0056] It is understood that, since the plurality of voltage stabilizing units 24 are respectively kept compressed, the two pins of the plurality of voltage stabilizing units 24 will respectively maintain the reverse release torque, so that the pins of the plurality of voltage stabilizing units 24 attached to the corresponding flip connectors 22 are kept pressing against the corresponding flip connectors 22, and thus the pins of the plurality of voltage stabilizing units 24 pressing against the corresponding flip connectors 22 are respectively defined as the voltage stabilizing parts 241.

[0057] In another modified embodiment, each of the voltage regulating units 24 includes a spring. The voltage regulating units 24 are respectively disposed between the corresponding flip connector 22 and the flip mounting body 21 in a compressed manner. That is, the two ends of the compressed voltage regulating unit 24 press against the flip connector 22 and the flip mounting body 21, respectively, with the end of the voltage regulating unit 24 pressing against the flip connector 22 defined as the voltage regulating portion 241.

[0058] To enable those skilled in the art to understand this application, at least one embodiment of this application is described only by way of example, where several of the voltage regulating units 24 are implemented including torsion springs.

[0059] Furthermore, each of the plurality of flow-blocking assemblies 20 has two voltage-stabilizing units 24, and both voltage-stabilizing units 24 of the plurality of flow-blocking assemblies 20 are sleeved on the corresponding flip-up shaft portion 221. The two voltage-stabilizing units 24 of the plurality of flow-blocking assemblies 20 are respectively kept compressed, and each of the two voltage-stabilizing units 24 of the plurality of flow-blocking assemblies 20 forms two leads that can release torque coaxially in opposite directions. The two distant leads of the two voltage-stabilizing units 24 of the plurality of flow-blocking assemblies 20 are respectively disposed on the corresponding flip-up mounting body 21. The two close leads of the two voltage-stabilizing units 24 of the plurality of flow-blocking assemblies 20 are respectively defined as voltage-stabilizing portions 241. The two voltage-stabilizing portions 241 of the two voltage-stabilizing units 24 of the plurality of flow-blocking assemblies 20 are interconnected and kept pressing against the corresponding flip-up connector 22.

[0060] Since the voltage stabilizing unit 24 of the flow blocking component 20 is implemented as two, the stability of the flip connector 22 when it is pressed can be improved compared to a single voltage stabilizing unit 24.

[0061] Preferably, each of the plurality of flip-over connectors 22 has a through-slot 2201. The two interconnected voltage stabilizing parts 241 of the two voltage stabilizing units 24 of the plurality of flow-blocking assemblies 20 press against the flip-over connector 22 by inserting into the corresponding through-slot 2201 and pressing against the inner wall of the corresponding through-slot 2201, thereby improving the stability when the two interconnected voltage stabilizing parts 241 of the two voltage stabilizing units 24 of the plurality of flow-blocking assemblies 20 press against the corresponding flip-over connector 22.

[0062] Preferably, the thickness of the plurality of flow-blocking bodies 23 gradually decreases from near the flip connector 22 to away from the flip connector 22 along the extension direction of the corresponding sewage inlet channel 1102. According to the lever principle, the center of gravity of the corresponding flow-blocking body 23 is closer to the corresponding flip axis, so as to reduce the impact force required for the sewage in the corresponding sewage inlet channel 1102 to impact the corresponding flow-blocking body 23 and move it away from the corresponding sewage inlet channel 1102, making it easier for the sewage in the corresponding sewage inlet channel 1102 to be introduced into the sewage collection space 1101.

[0063] Specifically, the main body 10 of the device includes a sludge collection tank 11, a tank cover 12, and a water level sensor 13. The sludge collection tank 11 has a sludge collection space 1101, a plurality of sludge inlet channels 1102, and a tank opening 1103. The tank opening 1103 is formed at the upper part of the sludge collection tank 11 in the direction of gravity, and the tank opening 1103 is in communication with the sludge collection space 1101. The tank cover 12 is adapted to the tank opening 1103, and the tank cover 12 is disposed at the tank opening 1103 of the sludge collection tank 11 to close the tank opening 1103. The box cover 12 has a ventilation channel 1201 that communicates with the sewage collection space 1101, so that when sewage is introduced into the sewage collection space 1101, the compressed air in the sewage collection space 1101 is discharged through the ventilation channel 1201, and then sewage is smoothly introduced into the sewage collection space 1101 through at least one sewage inlet channel 1102.

[0064] Preferably, the main body 10 of the device further includes a water level sensor 13. The water level sensor 13 is disposed on the tank cover 12, and the water level sensor 13 is used to monitor the sewage water level in the sewage collection space 1101 in real time.

[0065] The lifting assembly 40 includes a lifting drive 41 and a discharge pipe 42. The lifting drive 41 is located in the sludge collection space 1101. The lifting drive 41 is used to suck up sewage and crushed debris in the sewage from the sludge collection space 1101. The lifting drive 41 has a suction port and a discharge port. The suction port of the lifting drive 41 is in communication with the sludge collection space 1101. The discharge port of the lifting drive 41 is connected to the outside of the device body 10 through the discharge pipe 42. That is, one end of the discharge pipe 42 is connected to the discharge port of the lifting drive 41, and the other end of the discharge pipe 42 is connected to the outside of the device body 10. The water level sensor 13 is electrically connected to the lifting drive 41 so that when the water level sensor 13 detects that the sewage level in the sewage collection space 1101 has reached the expected depth, the lifting drive 41 is activated, and the sewage and crushed debris in the sewage in the sewage collection space 1101 are sucked out from the suction port. Then, the sewage and crushed debris in the sewage collection space 1101 are discharged outward in sequence through the discharge port and the outlet pipe 42.

[0066] As an example, the lifting drive 41 is implemented to include an impeller pump. The end of the outlet pipe 42 remote from the lifting drive 41 passes through the tank cover 12. The end of the outlet pipe 42 remote from the lifting drive 41 may be configured to communicate with the main sewage pipe in the site to pump sewage and crushed debris in the sewage collection space 1101 into the main sewage pipe in the site.

[0067] Preferably, the sewage lifting device for preventing backflow further includes a floating seal assembly 50. The floating seal assembly 50 includes a floating mounting component 51, a rotating component 52, and a floating seal component 53. The floating mounting component 51 is disposed on the tank cover 12 and is located near the ventilation channel 1201. The rotating component 52 includes a rotating part 521 and a floating connecting part 522. One end of the floating connecting part 522 is rotatably disposed on the floating mounting component 51 through the rotating part 521. The floating sealing member 53 is disposed at the other end of the floating connecting part 522 away from the rotating part 521, so that it can rotate about the rotating part 521 via the floating connecting part 522 and abut against and move away from the port of the ventilation channel 1201. This defines the portion of the floating sealing member 53 corresponding to the port of the ventilation channel 1201 as a sealing portion. The sealing portion is adapted to the port of the ventilation channel 1201, and the sealing portion can elastically deform and block the ventilation channel 1201 when it abuts against the port of the ventilation channel 1201. In other words, by abutting against and blocking the port of the ventilation channel 1201 by the sealing portion of the floating sealing member 53, the communication between the ventilation channel 1201 and the sludge collection space 1101 can be blocked.

[0068] The floating sealing member 53 has a cavity so that when the sewage level in the sewage collection space 1101 gradually rises and approaches the opening 1103 of the tank, the floating sealing member 53 is subjected to buoyancy and rotates around the rotating part 521 via the floating connection part 522, and the sealing part of the floating sealing member 53 abuts against and seals the port of the ventilation channel 1201.

[0069] It is worth mentioning that, during the use of the sewage lifting device that can prevent backflow, when a large amount of sewage is continuously introduced into the sewage collection space 1101 through several sewage inlet channels 1102, and the lifting drive component 41 is not activated in time due to malfunction and / or power failure, the sewage level in the sewage collection space 1101 will gradually rise and approach the opening 1103 of the box. This causes the floating sealing component 53 to be buoyed and rotate around the rotating part 521 through the floating connection part 522. The sealing part of the floating sealing component 53 abuts against and seals the port of the ventilation channel 1201, thereby preventing the sewage in the sewage collection space 1101 from overflowing through the ventilation channel 1201, and thus preventing the sewage overflowing through the ventilation channel 1201 from polluting the outside and causing unnecessary losses.

[0070] After the sewage in the sewage collection space 1101 is discharged, the floating sealing member 53 will rotate around the rotating part 521 via the floating connecting part 522 and move away from the ventilation channel 1201, so that external air can enter the sewage collection space 1101 through the ventilation channel 1201, thereby balancing the internal and external air pressure of the sewage collection space 1101.

[0071] Preferably, the floating sealing member 53 includes a floating body 531 and a floating sealing member 532. The floating body 531 is disposed at the other end of the floating connecting portion 522 away from the rotating portion 521. The floating body 531 has the cavity and an opening communicating with the cavity. The floating sealing member 532 is disposed on the floating body 531, and the floating sealing member 532 is disposed at the opening of the floating body 531 in a manner that can close the opening. The end of the floating sealing member 532 that rotates about the rotating portion 521 via the floating body 531 and the floating connecting portion 522 and abuts against and is away from the port of the ventilation channel 1201 is defined as the sealing portion, so that when the sealing portion of the floating sealing member 532 abuts against the port of the ventilation channel 1201, it undergoes elastic deformation to block the ventilation channel 1201.

[0072] More preferably, the sealing portion of the floating closure 532 is made of rubber so that when the sealing portion abuts against and blocks the port of the ventilation channel 1201, the sealing performance of the sealing portion when blocking the port of the ventilation channel 1201 is improved by the elastic deformation of the sealing portion, thereby providing a guarantee to prevent sewage in the sludge collection space 1101 from overflowing through the ventilation channel 1201.

[0073] The floating closure 532 is threadedly connected to the floating body 531 for replacement when the closure portion of the floating closure 532 ages.

[0074] Specifically, the floating mounting member 51 forms a pivot hole 5101. The rotating part 521 is disposed in the pivot hole 5101 in a manner that allows it to rotatably reside within the pivot hole 5101.

[0075] Furthermore, the rotating member 52 also includes a swaying portion 523. One end of the swaying portion 523 is connected to the end of the floating connection portion 522 near the rotating portion 521. The other end of the swaying portion 523 extends in a direction away from the floating connection portion 522. The floating rotating mounting member 51 has a swaying portion 511. The abutment 511 is located on the movement path of the abutment 523 when the floating connection 522 drives the abutment 523 to rotate around the rotating part 521 and the closing part of the floating sealing member 532 moves away from the port of the ventilation channel 1201. When sewage is discharged in the sewage collection space 1101 and the floating connection 522 drives the abutment 523 to rotate around the rotating part 521 and the closing part of the floating sealing member 532 moves away from the port of the ventilation channel 1201, the abutment 511 stops the abutment 523 from rotating around the rotating part 521, thereby preventing the entire floating sealing member 53 from naturally hanging down to the lowest point around the rotating part 521.

[0076] It is understandable that before the sewage level in the sewage collection space 1101 gradually rises and contacts the floating sealing member 53, if the floating sealing member 53 hangs down naturally to its lowest point around the rotating part 521 as an axis, the direction of rotation of the floating sealing member 53 around the rotating part 521 through the floating connection part 522 due to buoyancy cannot be controlled. This will result in the floating sealing member 53 rotating around the rotating part 521 through the floating connection part 522 and continuously moving away from the port of the ventilation channel 1201. Therefore, by stopping the tilting part 523 through the abutting part 511, the floating sealing member 53 is prevented from naturally hanging down to the lowest point around the rotating part 521 as an axis. When the sewage level in the sewage collection space 1101 rises, it is easy to control the direction of rotation of the floating sealing member 53 around the rotating part 521 through the floating connecting part 522 as an axis, thereby ensuring that the sealing part of the floating sealing member 532 of the floating sealing member 53 blocks the port of the ventilation channel 1201.

[0077] Preferably, the rotating part 521, the floating connecting part 522, and the abutting part 523 are integrally formed.

[0078] Preferably, the sewage lifting device that prevents backflow further includes a filter assembly 60. The filter assembly 60 is disposed within the ventilation channel 1201 and is used to adsorb odors in the air within the sewage collection space 1101 passing through the ventilation channel 1201.

[0079] Specifically, the filter assembly 60 includes a first mounting member 61, a second mounting member 62, and a filter element 63. The first mounting member 61 and the second mounting member 62 are respectively located at both ends of the extending direction of the ventilation channel 1201. The filter element 63 is disposed within the ventilation channel 1201, and the filter element 63 is located between the first mounting member 61 and the second mounting member 62. The first mounting member 61 and the second mounting member 62 are used to restrict the position of the filter element 63 within the ventilation channel 1201, so as to prevent the air passing through the ventilation channel 1201 from blowing the filter element 63 out when air in the dirt collection space 1101 is discharged through the ventilation channel 1201.

[0080] In this embodiment, the first mounting member 61 is laser-welded to the inner wall of the end of the ventilation channel 1201. The second mounting member 62 is detachably connected to the first mounting member 61, and the second mounting member 62 is located at the end of the ventilation channel 1201 away from the first mounting member 61.

[0081] The first mounting member 61 and the second mounting member 62 are respectively provided with a plurality of first through holes 6101 and a plurality of second through holes 6201, so that air in the dirt collection space 1101 can enter and be discharged to the outside through the ventilation channel 1201.

[0082] Preferably, the first mounting member 61 is laser-welded to the inner wall of the end of the ventilation channel 1201 near the dirt collection space 1101. This fixes the position of the first mounting member 61, preventing it from falling off and thus preventing the filter element 63 from falling into the dirt collection space 1101. The second mounting member 62 is detachably connected to the first mounting member 61 and is located at the end of the ventilation channel 1201 away from the first mounting member 61. This facilitates the replacement of the filter element 63 by separating the second mounting member 62 from the first mounting member 61 and removing it from the end of the ventilation channel 1201 away from the first mounting member 61.

[0083] More preferably, the first mounting member 61 extends towards the second mounting member 62 along the extension direction of the ventilation channel 1201 to form a plurality of fixing guide claws 611. The second mounting member 62 extends towards the first mounting member 61 along the extension direction of the ventilation channel 1201 to form a plurality of insertion portions 621 corresponding to the plurality of fixing guide claws 611. The plurality of insertion portions 621 are respectively provided with a plurality of fixing guide grooves along the extension direction of the ventilation channel 1201. The plurality of fixing guide grooves are respectively used to accommodate the corresponding fixing guide claws 611. The plurality of fixing guide claws 611 are respectively inserted into the fixing guide grooves of the corresponding insertion portions 621 in an interference fit manner, thereby realizing the detachable connection of the second mounting member 62 to the first mounting member 61.

[0084] In another modified embodiment, the first mounting member 61 extends towards the second mounting member 62 along the extending direction of the venting channel 1201 to form a plurality of fixed guide claws 611. The second mounting member 62 extends towards the first mounting member 61 along the extending direction of the venting channel 1201 to form a plurality of insertion portions 621 corresponding to the plurality of fixed guide claws 611. The plurality of fixed guide claws 611 are respectively provided with a plurality of fixed guide grooves along the extending direction of the venting channel 1201. The plurality of fixed guide grooves are respectively used to accommodate the corresponding insertion portions 621. The plurality of insertion portions 621 are respectively inserted into the fixed guide grooves of the corresponding fixed guide claws 611 in an interference fit manner, thereby realizing the detachable connection of the second mounting member 62 to the first mounting member 61.

[0085] As an example, the filter element 63 is implemented to include an activated carbon sponge.

[0086] Preferably, a sealing ring is provided between the cover 12 and the sludge collection box 11 to improve the sealing performance of the cover 12 when it is positioned at the box opening 1103 of the sludge collection box 11.

[0087] Preferably, the cover 12 extends into the wastewater collection space 1101 along the direction of gravity in a closed manner to form an extension 121, and the extension 121 encloses a pressure chamber 1202 within the wastewater collection space 1101. The pressure chamber 1202 is in communication with the wastewater collection space 1101. The water level sensor 13 includes a pressure sensor, and the detection end of the water level sensor 13 is located within the pressure chamber 1202 to monitor the air pressure value within the pressure chamber 1202 in real time, thereby determining the wastewater level in the wastewater collection space 1101 in real time, thus achieving real-time monitoring of the wastewater level in the wastewater collection space 1101.

[0088] It should be noted that, since the pressure chamber 1202 is formed by the extension 121, as the sewage level in the sewage collection space 1101 gradually rises and gradually submerges the end of the extension 121, the sewage in the sewage collection space 1101 will seal the connection between the pressure chamber 1202 and the sewage collection space 1101, so that the pressure chamber 1202 forms a closed space. As a result, the sewage that gradually rises in the sewage collection space 1101 cannot smoothly enter the pressure chamber 1202 because the air in the pressure chamber 1202 cannot be discharged.

[0089] Simultaneously, as the sewage level in the collection space 1101 gradually rises, the sewage at the connection between the pressure chamber 1202 and the collection space 1101 will be unable to smoothly enter the pressure chamber 1202, thus pressurizing the air inside the pressure chamber 1202 and changing the air pressure inside the pressure chamber 1202. This causes a change in the air pressure value detected by the water level sensor 13. Since the depth of the sewage level in the collection space 1101 is positively correlated with the degree of air compression in the pressure chamber 1202, the sewage level in the collection space 1101 can be judged in real time based on the air pressure value in the pressure chamber 1202 monitored in real time by the water level sensor 13, thereby achieving real-time monitoring of the sewage level in the collection space 1101.

[0090] Preferably, the main body 10 of the device further includes a plurality of sealing members 14 corresponding to the plurality of sewage inlet channels 1102. The plurality of sealing members 14 are respectively disposed in a detachable manner at the end of the corresponding sewage inlet channel 1102 away from the sewage collection space 1101, and the plurality of sealing members 14 are respectively used to block the corresponding sewage inlet channel 1102.

[0091] It should be noted that, with the installation of several sealing components 14, users can remove the corresponding sealing components 14 according to actual needs, so that the end of the corresponding sewage inlet channel 1102 away from the sewage collection space 1101 can be connected to a sewage outlet such as a floor drain, washing machine outlet, or basin drain, which requires sewage discharge, through a pipe. Simultaneously, when at least one of the sewage inlet channels 1102 is temporarily not in use, the corresponding sealing component 14 can be installed at the end of the corresponding sewage inlet channel 1102 away from the sewage collection space 1101 to seal the temporarily unused sewage inlet channel 1102.

[0092] Specifically, a plurality of the sealing members 14 are detachably connected to the inner wall of the corresponding sewage inlet channel 1102 by means of threaded connection. That is, a plurality of the sealing members 14 are partially inserted into the corresponding sewage inlet channel 1102 and threadedly connected to the inner wall of the corresponding sewage inlet channel 1102.

[0093] Among them, a sealing ring is provided between a plurality of the sealing components 14 and the inner wall of the corresponding sewage inlet channel 1102 to improve the sealing performance between the plurality of sealing components 14 and the inner wall of the corresponding sewage inlet channel 1102, and to prevent sewage in the sewage collection space 1101 from flowing out through the gap between the plurality of sealing components 14 and the inner wall of the corresponding sewage inlet channel 1102.

[0094] Preferably, the pulverizing assembly 30 includes a pulverizing drive 31 and a pulverizing element 32. The pulverizing drive 31 is disposed within the wastewater collection space 1101. The pulverizing element 32 is synchronously rotatably connected to the output end of the pulverizing drive 31, so that when the output end of the pulverizing drive 31 rotates, the pulverizing element 32 is synchronously rotated, thereby pulverizing the impurities in the wastewater within the wastewater collection space 1101.

[0095] The crushing drive component 31 is implemented to include a drive motor. The crushing component 32 is implemented to include a stainless steel stirring blade.

[0096] Preferably, the pulverizing assembly 30 further includes a debris-collecting cover 33 and an inlet pipe 34. One end of the debris-collecting cover 33 is disposed on the pulverizing drive member 31, and the debris-collecting cover 33 surrounds the outer periphery of the pulverizing member 32 around the axis of the output end of the pulverizing drive member 31. The debris-collecting cover 33 encloses a pulverizing space 3301 within the sludge collection space 1101. That is, the pulverizing member 32 is located within the pulverizing space 3301. The debris-collecting cover 33 is provided with a plurality of slag-passing holes 3302. The pulverizing space 3301 is kept in communication with the sludge collection space 1101 through the plurality of slag-passing holes 3302. One end of the inlet pipe 34 is disposed on the debris-collecting cover 33, and one end of the inlet pipe 34 is kept in communication with the pulverizing space 3301 of the debris-collecting cover 33. The sludge collection box 11 is also provided with a debris-entry channel 1104. The debris-entry channel 1104 is adapted to the other end of the inlet pipe 34. The other end of the inlet pipe 34 is connected to the impurity inlet channel 1104 so that wastewater containing large-volume impurities can be introduced into the crushing space 3301 through the impurity inlet channel 1104 and the inlet pipe 34.

[0097] As an example, since the debris in the sewage from the toilet drain and / or kitchen sink drain is usually large, the toilet drain and / or kitchen sink drain can be connected to the debris inlet channel 1104 through a pipe, so that the sewage from the toilet drain and / or kitchen sink drain, together with the larger debris in the sewage, can be introduced into the pulverizing space 3301 through the debris inlet channel 1104 and the inlet pipe 34.

[0098] Furthermore, during the process of the output end of the crushing drive 31 rotating and synchronously driving the crushing component 32, the crushing component 32 will crush the debris accumulated in the crushing space 3301, and the crushed debris will enter the sludge collection space 1101 through a number of the sludge passage holes 3302.

[0099] Meanwhile, as the output end of the crushing drive 31 rotates and synchronously drives the crushing component 32, the sewage in the crushing space 3301 is agitated and flows into the sludge collection space 1101 through several sludge passage holes 3302. At the same time, the sewage in the sludge collection space 1101 is agitated and enters the crushing space 3301 through several sludge passage holes 3302, and drives the impurities in the sewage in the sludge collection space 1101 into the crushing space 3301 through several sludge passage holes 3302. The rotating crushing component 32 further crushes the impurities in the sewage in the sludge collection space 1101, reducing the probability of jamming when the lifting drive 41 sucks up the impurities in the sewage in the sludge collection space 1101, thereby increasing the service life of the lifting drive 41.

[0100] The size of the debris in the sewage that the lifting drive 41 can suck through the suction port is not less than the aperture size of a plurality of the slag passage holes 3302.

[0101] It is understood that wastewater containing debris with a volume not larger than the aperture of the slag passages 3302 can be introduced into the sludge collection space 1101 through the sludge inlet channels 1102, and wastewater containing debris with a volume larger than the aperture of the slag passages 3302 can be introduced into the crushing space 3301.

[0102] It is worth mentioning that, due to the setting of the impurity hood 33, impurities in the sewage entering the pulverizing space 3301 can be prevented from being accidentally sucked into the suction port of the lifting drive 41, thereby ensuring the normal use of the lifting drive 41.

[0103] Preferably, the impurity cover 33 has an inspection port 3303. The box cover 12 has a cover removal port 1203. The box cover 12 forms a cover insertion groove 1204 on the outer periphery of the cover removal port 1203. The cover insertion groove 1204 is adapted to the periphery of the inspection port 3303. The periphery of the inspection port 3303 is provided to be inserted into the cover insertion groove 1204, and the inspection port 3303 and the cover removal port 1203 are correspondingly connected.

[0104] It is understandable that when debris in the crushing space 3301 jams the rotating crushing component 32, the user can manually enter the crushing space 3301 through the cover removal port 1203 and the inspection port 3303 to remove the debris jamming the crushing component 32 for maintenance.

[0105] Specifically, the periphery of the inspection port 3303 is inserted into the cover insertion groove 1204 by pressing against the bottom wall of the cover insertion groove 1204, so as to prevent uncrushed debris in the crushing space 3301 from entering the dirt collection space 1101 through the gap between the periphery of the crushing space 3301 and the bottom wall of the cover insertion groove 1204.

[0106] As an example, a sealing ring may be provided between the periphery of the access port 3303 and the bottom wall of the cover insertion groove 1204 to improve the sealing performance when the periphery of the access port 3303 is pressed against the bottom wall of the cover insertion groove 1204.

[0107] Preferably, the main body 10 of the device further includes a sealing cover 15. The sealing cover 15 is disposed on the box cover 12 to cover the box cover 12. The portion of the sealing cover 15 extends into the box cover opening 1203 in a manner that remains attached to the inner wall of the box cover opening 1203 to form a stabilizing portion 151, thereby sealing the box cover opening 1203 through the sealing cover 15.

[0108] It is understood that when the output end of the crushing drive 31 rotates and synchronously drives the crushing component 32, the sewage in the crushing space 3301 can be prevented from splashing outward through the inspection port 3303 and the cover impurity removal port 1203 because the closed cover 15 closes the cover impurity removal port 1203.

[0109] As an example, in this embodiment, the end of the outlet pipe 42 away from the lifting drive member 41 passes through the box cover 12 and the closing cover 15. The closing cover 15 is provided with at least one vent, and the venting channel 1201 communicates with the outside through the vent to allow air to enter and exit.

[0110] Preferably, the main body 10 of the device further includes a maintenance seal 16. The maintenance seal 16 is disposed between the stabilizing part 151 and the inner wall of the cover impurity removal port 1203, and the maintenance seal 16 is used to fill the gap between the stabilizing part 151 and the inner wall of the cover impurity removal port 1203 to prevent sewage in the pulverizing space 3301 from flowing out through the gap between the stabilizing part 151 and the inner wall of the cover impurity removal port 1203.

[0111] Preferably, the maintenance seal 16 is implemented to include a sealing ring.

[0112] In this embodiment, the sewage lifting device that prevents backflow further includes at least one pair of stabilizing components 70. Each pair of stabilizing components 70 includes a stabilizing element 71 and an insert 72 corresponding to the stabilizing element 71. The pair of stabilizing elements 71 are respectively disposed on the inner wall of the sewage collection space 1101 in a relative manner. The pair of inserts 72 are respectively disposed on the pulverizing drive member 31 in a relative manner, and the pair of inserts 72 are respectively connected to the corresponding stabilizing element 71.

[0113] When sewage entering the sewage collection space 1101 is compressed by excessive water pressure, the inner wall of the sewage collection space 1101 is held in place by the pulverizing drive 31, which is connected to the inner wall of the sewage collection space 1101 via a pair of inserts 72 and a corresponding stabilizer 71. This prevents the inner wall of the sewage collection space 1101 from shifting and bulging. Simultaneously, connecting the inner wall of the sewage collection space 1101 to the pulverizing drive 31 via a pair of stabilizers 71 and a corresponding insert 72 fixes the position of the pulverizing drive 31.

[0114] As an example, a pair of stabilizers 71 are provided with T-shaped slots along the extension direction, and a pair of inserts 72 are provided with T-shaped blocks. The pair of inserts 72 are connected to the corresponding stabilizers 71 by snapping into the T-shaped slots of the corresponding stabilizers 71.

[0115] Those skilled in the art should understand that the embodiments of this application described above and shown in the accompanying drawings are merely examples and do not limit the scope of this application. The advantages of this application have been fully and effectively implemented. The functional and structural principles of this application have been demonstrated and explained in the embodiments, and any variations or modifications can be made to the implementation of this application without departing from the stated principles.

Claims

1. A sewage lifting device that prevents backflow, characterized in that, The sewage lifting device that prevents backflow includes: The device body has a sludge collection space and several sludge inlet channels. The several sludge inlet channels are respectively connected to the sludge collection space and are used to centrally introduce sewage into the sludge collection space. A plurality of flow-blocking components, each of the plurality of flow-blocking components comprising: A flip-up mounting body, wherein several flip-up mounting bodies are respectively disposed on the inner wall of the sewage collection space in a manner close to the corresponding sewage inlet channel; A flip connector, one end of each of the flip connectors is rotatably disposed on the corresponding flip mounting body, so that the axial direction of the flip connectors when they rotate is defined as the flip axis. A flow-blocking body, wherein a plurality of flow-blocking bodies are respectively disposed at the other end of the corresponding flip-connector away from the corresponding flip-mounting body, and the connection points of the plurality of sewage inlet channels with the sewage collection space are respectively located on the path of the plurality of flow-blocking bodies rotating around the corresponding flip-axis through the corresponding flip-connector, the plurality of flow-blocking bodies are respectively adapted to the connection points of the plurality of sewage inlet channels with the sewage collection space, and the plurality of flow-blocking bodies are respectively used to block the connection points of the plurality of sewage inlet channels with the sewage collection space; At least one voltage stabilizing unit, and several voltage stabilizing units each having a voltage stabilizing part, wherein the voltage stabilizing parts of several voltage stabilizing units are respectively kept compressed and elastically deformable and pressed against the corresponding flipping connector around the corresponding flipping axis, and the rotation directions of several flow-blocking bodies respectively rotating around the corresponding flipping axis and blocking the corresponding sewage inlet channel are respectively kept in the same direction as the pressing direction of the voltage stabilizing parts of several voltage stabilizing units around the flipping axis, and the several voltage stabilizing parts are respectively kept compressed and pressed against the corresponding flipping connector; A pulverizing component is disposed in the sludge collection space and is used to pulverize debris in the sewage within the sludge collection space. A lifting component is disposed in the sludge collection space, and the lifting component is used to centrally pump the sewage and crushed debris in the sewage from the sludge collection space to the outside.

2. The sewage lifting device for preventing backflow according to claim 1, characterized in that, A plurality of the flip-mounted bodies each form a flip hole along the flip axis, and a plurality of the flip-connecting members each form a flip shaft portion along the flip axis that is adapted to the corresponding flip hole. The flip shaft portions of the plurality of the flip-connecting members are respectively disposed in the flip hole of the corresponding flip-mounted body in a manner that allows them to rotatably enter the corresponding flip hole.

3. The sewage lifting device for preventing backflow according to claim 2, characterized in that, Each of the voltage stabilizing units of the plurality of flow-blocking assemblies includes a torsion spring, and each of the voltage stabilizing units of the plurality of flow-blocking assemblies is implemented as two units. The rotating portions of the two voltage stabilizing units of the plurality of flow-blocking assemblies are sleeved on the corresponding flipping shaft portions. The two voltage stabilizing units of the plurality of flow-blocking assemblies are respectively kept compressed, and the two voltage stabilizing units of the plurality of flow-blocking assemblies respectively form two leads that can release torque coaxially in opposite directions. The two distant leads of the two voltage stabilizing units of the plurality of flow-blocking assemblies are respectively set on the corresponding flipping mounting body. The two close leads of the two voltage stabilizing units of the plurality of flow-blocking assemblies are respectively defined as voltage stabilizing parts. The two voltage stabilizing parts of the two voltage stabilizing units of the plurality of flow-blocking assemblies are connected to each other and keep pressing against the corresponding flipping connector.

4. The sewage lifting device for preventing backflow according to claim 3, characterized in that, A plurality of the flip connectors are respectively provided with through slots, and the two voltage stabilizing parts of the two voltage stabilizing units of the plurality of flow blocking components are connected to each other and are kept pressing against the flip connector by inserting into the corresponding through slot and pressing against the inner wall of the corresponding through slot.

5. The sewage lifting device for preventing backflow according to claim 4, characterized in that, The thickness of several of the flow-blocking bodies gradually decreases from near the flip connector to away from the flip connector along the corresponding sewage inlet channel.

6. The sewage lifting device for preventing backflow according to claim 5, characterized in that, The main body of the device includes a sludge collection tank, a tank cover, and a water level sensor. The sludge collection tank has a sludge collection space, several sludge inlet channels, and a tank opening. The tank opening is located at the top of the sludge collection tank in the direction of gravity and is connected to the sludge collection space. The tank cover is adapted to the tank opening and is disposed at the tank opening of the sludge collection tank. The tank cover is used to close the tank opening and has a ventilation channel connected to the sludge collection space.

7. The sewage lifting device for preventing backflow according to claim 6, characterized in that, The main body of the device also includes a water level sensor, which is disposed on the tank cover and is used to monitor the sewage level in the sewage collection space in real time. The lifting assembly includes a lifting drive and a discharge pipe. The lifting drive is disposed in the sewage collection space and is used to suck up the sewage and crushed debris in the sewage in the sewage collection space. The lifting drive has a suction port and a discharge port. The suction port of the lifting drive is connected to the sewage collection space, and the discharge port of the lifting drive is connected to the outside of the main body of the device through the discharge pipe. The water level sensor is electrically connected to the lifting drive.

8. The sewage lifting device for preventing backflow according to claim 7, characterized in that, The sewage lifting device for preventing backflow further includes a floating seal assembly, which includes a floating mounting component, a rotating component, and a floating seal component. The floating mounting component is disposed on the tank cover and is located near the ventilation channel. The rotating component includes a rotating part and a floating connecting part. One end of the floating connecting part is rotatably disposed on the floating mounting component through the rotating part. The floating seal component is disposed at the other end of the floating connecting part away from the rotating part, so that it can rotate around the rotating part and abut against and move away from the port of the ventilation channel. The part of the floating seal component corresponding to the port of the ventilation channel is defined as a closed part. The closed part is adapted to the port of the ventilation channel. The closed part can elastically deform and block the ventilation channel when it abuts against the port of the ventilation channel. The floating seal component has a cavity.

9. The sewage lifting device for preventing backflow according to claim 8, characterized in that, The floating sealing component includes a floating body and a floating closure member. The floating body is disposed at the other end of the floating connecting portion away from the rotating portion. The floating body has the cavity and an opening communicating with the cavity. The floating closure member is disposed on the floating body and is located at the opening of the floating body in a manner that can close the opening. The end of the floating closure member that rotates about the rotating portion via the floating body and the floating connecting portion and abuts against and is away from the venting channel port is defined as the closure portion.

10. The sewage lifting device for preventing backflow according to claim 9, characterized in that, The floating mounting member forms a pivot hole, and the rotating part is disposed in the pivot hole in a manner that allows it to rotatably reside within the pivot hole. The rotating member also includes a push-off part, one end of which is connected to the end of the floating connection member near the rotating part, and the other end of which extends in a direction away from the floating connection member. The floating mounting member has a stop-rotation part, which is located on the movement path of the push-off part when the floating connection member drives the push-off part to rotate around the rotating part as an axis and causes the sealing part of the floating closure member to move away from the vent port. The stop-rotation part is used to stop the push-off part.

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