Discharging structure for sewage tank and cleaning equipment

Abstract

The drain structure of the sewage tank comprises a tank body, a separation cavity is formed in the tank body, a tangential first inlet is formed in the separation cavity, and the separation cavity communicates with the interior of the tank body through the first inlet; a mixture in the box body enters the separation cavity through the first inlet to realize cyclone separation, an exhaust port is formed in the top of the separation cavity, the side wall of the separation cavity is communicated with a first channel, gas subjected to cyclone separation is exhausted through the exhaust port, and a solid-liquid mixture subjected to cyclone separation is exhausted out of the separation cavity through the first channel; the first channel communicated with the side wall of the separation cavity is additionally arranged, and solid and liquid in the mixture are pushed to the side wall of the separation cavity in the separation process, so that the solid and the liquid can directly enter the first channel to be discharged, and the separation efficiency of the separation cavity is greatly improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of cleaning equipment, and more particularly to a discharge structure for a sewage tank and a cleaning equipment. BACKGROUND

[0002] The currently used cleaning equipment such as a scrubber can not only be used for dust collection, but also can spray water and cleaning agent on the surface to be cleaned, and can suck the sewage containing solid waste to take it away from the cleaned surface, integrating the functions of dust and water suction, and having the advantages of environmental protection, energy saving, high efficiency, etc. The cleaning equipment is provided with a sewage tank. The existing sewage tank not only needs to collect the sewage and solid waste generated after cleaning, but also needs to effectively realize gas-liquid separation to ensure that the gas is smoothly discharged and the liquid and solid waste are retained. However, the traditional sewage tank often adopts a simple structure and lacks a special gas-liquid-solid three-phase separation design, resulting in that the gas, liquid and small particle solid are mixed and discharged, which not only reduces the working efficiency of the cleaning equipment, but also may cause poor gas discharge. For example, a Chinese patent with the authorization announcement number CN102018474B discloses a suction type cleaning equipment and a centrifugal separator. The suction type cleaning equipment includes a mixture conveying system and a mixture recovery system. The mixture recovery system includes a centrifugal separator for separating a working air flow carrying liquid and debris. The centrifugal separator has a tangential air / water inlet, a water outlet and an air outlet in the lower part. The air outlet has a vertical standpipe extending upward from the tangential air / water inlet and the water outlet. In the technical solution, the working air flow carrying liquid and debris is sucked into the separator for separation. A large amount of liquid and debris is separated and retained in the separator. The separator does not have a channel for timely discharging the liquid and debris. The liquid and debris retained in the separator will affect the actual separation efficiency. SUMMARY

[0003] The technical problem to be solved by the present application is to provide a discharge structure for a sewage tank and a cleaning equipment. The sewage tank is provided with a separation chamber with a tangential first inlet to enable cyclone separation of the mixture, and a first channel is additionally provided in communication with the side wall of the separation chamber. The solid and liquid in the mixture are pushed to the side wall of the separation chamber during the separation process, so as to be directly discharged into the first channel, greatly improving the separation efficiency of the separation chamber.

[0004] The present application provides a discharge structure for a sewage tank, which comprises a tank body. A separation chamber is arranged in the tank body. The separation chamber is provided with a tangential first inlet. The separation chamber is in communication with the inside of the tank body through the first inlet. The mixture in the tank body enters the separation chamber through the first inlet to realize cyclone separation. The top of the separation chamber is provided with an air outlet. The side wall of the separation chamber is in communication with a first channel. The gas after cyclone separation is discharged through the air outlet. The solid-liquid mixture after cyclone separation is discharged from the separation chamber through the first channel.

[0005] The sewage tank is installed on a cleaning device such as a scrubber, and is mainly used for collecting and storing the mixture generated after cleaning. A separation chamber is arranged in the tank body of the sewage tank. The mixture sucked by the cleaning device is transported into the separation chamber for gas-liquid-solid three-phase separation. It should be noted that the mixture in the present solution refers to a gas-liquid-solid three-phase mixture, i.e., sewage with solid matter. The fluid refers to a gas-liquid mixture. The separation chamber is provided with a tangential first inlet. This design causes the mixture to generate a cyclone effect when entering the separation chamber. The mixture can enter the separation chamber in a high-speed rotating manner. The heavier liquid and dust are pushed to the chamber wall by centrifugal force, while the lighter gas is concentrated towards the center, achieving efficient separation. An exhaust port is arranged at the top of the separation chamber for discharging the lighter gas after cyclone separation. The heavier liquid and dust separated to the side wall of the separation chamber by cyclone separation can be directly discharged through the first channel, greatly improving the separation efficiency of the separation chamber.

[0006] As an improvement, the separation chamber comprises a filtering chamber and a cyclone chamber. The filtering chamber is used for preliminary separation of the mixture. The filtering chamber is provided with a first outlet communicating with the inside of the tank body. The first inlet is arranged on the side wall of the cyclone chamber. In the present solution, the separation chamber has two independent chambers, i.e., the filtering chamber and the cyclone chamber. The filtering chamber is used for receiving the mixture sucked by the cleaning device and preliminarily separating the mixture. The mixture is separated into solid matter and fluid by the filtering chamber. The solid matter is left in the filtering chamber, and the fluid is discharged from the filtering chamber to enter the tank body. The fluid entering the tank body can be automatically gas-liquid separated under the action of gravity, so that most of the liquid is left in the tank body due to gas-liquid separation. The fluid with a small amount of liquid enters the cyclone chamber through the first inlet, avoiding too much liquid in the cyclone chamber which affects the separation efficiency. The separation chamber realizes a multi-stage separation mechanism through the cooperation of the filtering chamber and the cyclone chamber, improves the overall separation efficiency, optimizes the space utilization, and makes the entire device more compact.

[0007] As an improvement, the cyclone chamber and the filtering chamber are arranged in an up-down distribution. One end of the first channel is connected with the cyclone chamber, and the other end of the first channel is connected with the filtering chamber. In the present solution, the cyclone chamber is arranged above the filtering chamber. The up-down distribution design effectively utilizes the vertical space, so that the structure distribution in the sewage tank is more compact. In the fluid discharged from the filtering chamber into the tank body, the heavier liquid can naturally sink to the bottom of the tank body for storage under the action of gravity, and the lighter gas can flow upwards to the first inlet to enter the cyclone chamber, so that the gas-liquid separation efficiency is higher. By arranging the first channel to connect the up-down distributed cyclone chamber and filtering chamber, the liquid and dust separated by the cyclone chamber can be directly discharged into the filtering chamber for collection, improving the separation efficiency and optimizing the space utilization, so that the overall structure is more compact.

[0008] As an improvement, the cyclone chamber is provided with a second outlet communicating with the first channel, and the second outlet is located at the top of the side wall of the cyclone chamber, and the first inlet is located at the bottom of the side wall of the cyclone chamber. In this technical solution, the second outlet communicating with the first channel is arranged on the side wall of the cyclone chamber, and the liquid and dust separated in the cyclone chamber are discharged into the first channel through the second outlet. The first inlet is arranged at the bottom of the side wall of the cyclone chamber, and the second outlet is arranged at the top of the side wall of the cyclone chamber, so that the fluid enters from the bottom of the cyclone chamber, can be more fully separated at high speed, and the fluid keeps in contact with the side wall of the cyclone chamber during high-speed rotation. After rotating to the top of the cyclone chamber, the gas, liquid and solid are discharged, and the separation efficiency is higher.

[0009] As an improvement, the first channel is provided with a first branch and a second branch, one end of the first branch and one end of the second branch are connected with the cyclone chamber, and the other end of the first branch and the other end of the second branch are connected with the filter chamber. In this technical solution, the first channel is divided into a first branch and a second branch, and each branch is used to connect the cyclone chamber and the filter chamber. The liquid and solid separated by the cyclone chamber flow into the filter chamber through the first branch and / or the second branch. The double-branch design allows more liquid and solid to flow from the cyclone chamber into the filter chamber at the same time, improves the overall processing efficiency, and has higher flexibility.

[0010] As an improvement, one end of the first branch is connected with one end of the second branch, and the first branch and the second branch are arranged in an inverted V shape. In this technical solution, one end of the first branch and one end of the second branch are connected with each other, so as to form an inverted V-shaped joint. From the joint, the first branch and the second branch extend downward respectively to form two sides of the inverted V shape. The inverted V-shaped distribution helps to uniformly distribute the liquid and solid substances flowing from the cyclone chamber, improves the flow efficiency, and reduces the risk of blockage.

[0011] As an improvement, the first inlet is arranged opposite to the first channel. In this technical solution, the first inlet and the first channel are arranged on opposite sides of the cyclone chamber, which helps to enhance the effect of centrifugal force, thereby improving the separation efficiency of solid and liquid. The opposite arrangement simplifies the structural design of the cyclone chamber, helps to balance the pressure distribution in the cyclone chamber, and enhances the stability and durability of the overall structure.

[0012] As an improvement, the separation cavity is in a barrel structure, the separation cavity is detachably connected with the box, and the separation cavity is provided with an openable bottom plate. In the technical solution, the separation cavity is designed in a barrel structure, which provides a larger internal space and is beneficial to the cyclone separation process of the mixture. The separation cavity is detachably connected with the box, allowing the separation cavity to be detached from the box. The solid matter can be separated from the sewage tank for cleaning, and the sewage can be directly poured out of the box, achieving the purpose of cleaning the solid and liquid separately. The openable bottom plate can be opened or closed as needed, making it easier to clean and maintain the inside of the separation cavity. The user can directly open the bottom plate to clean the solid waste or sediment in the separation cavity. The solid waste has a certain weight and can fall by itself under the action of gravity after the bottom plate is opened, without the need for manual cleaning, improving the user experience.

[0013] As an improvement, the side wall of the filter chamber is configured as a partition plate, the filter chamber is separated from the first channel by the partition plate, and the mixture in the first channel is stored and released through the bottom plate. In the technical solution, the side wall of the filter chamber is configured as a partition plate that can separate the first channel, so that the filter chamber and the first channel are not in communication, avoiding the influence of gas flow on the cyclone separation effect of the cyclone chamber. The first channel is connected to the filter chamber through the partition plate, so that the solid and liquid entering the first channel can be stored through the bottom plate and fall by themselves after the bottom plate is opened, without the need for manual cleaning. On the other hand, the side wall of the filter chamber and the side wall of the cyclone chamber are integrally formed, which is simpler in structure and better in sealing.

[0014] The application also provides a cleaning device comprising any one of the discharge structures for a sewage tank described above. In the technical solution, the cleaning device comprises a brush assembly and a main machine. The brush assembly and the sewage tank are both installed on the main machine, and the sewage tank is detachably installed on the main machine, so that the user can detach the sewage tank from the cleaning device for cleaning. The sewage tank is connected in communication with the brush assembly, and the mixture sucked by the brush assembly is transported to the separation cavity in the sewage tank. The separation cavity separates the mixture into three phases of gas, liquid and solid. The separation cavity is provided with a tangential first inlet, which produces a cyclone effect when the mixture enters the separation cavity. The mixture enters the separation cavity at high speed, and the heavier liquid and dust are pushed to the wall of the cavity by centrifugal force, while the lighter gas is concentrated in the center, achieving efficient separation. An exhaust port is provided at the top of the separation cavity to exhaust the lighter gas after cyclone separation. The heavier liquid and dust separated by cyclone separation and collected on the side wall of the separation cavity can be directly discharged through the first channel connected to the side wall of the separation cavity, greatly improving the separation efficiency of the separation cavity. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1A front view schematic diagram of a sewage tank according to the present application.

[0016] Figure 2 A front view schematic diagram of a sewage tank according to the present application. Figure 1 A sectional view schematic diagram of the sewage tank according to the present application.

[0017] Figure 3 A side view schematic diagram of a sewage tank according to the present application.

[0018] Figure 4 A side view schematic diagram of a sewage tank according to the present application. Figure 3 A sectional view schematic diagram of the sewage tank according to the present application.

[0019] Figure 5 A front view schematic diagram of a cleaning device according to the present application.

[0020] In the figure: 1, tank; 11, separation chamber; 111, first inlet; 112, filter chamber; 1121, partition plate; 113, cyclone chamber; 114, first outlet; 115, second outlet; 116, bottom plate; 12, first passage; 121, first branch; 122, second branch; 2, main machine; 3, floor brush assembly. DETAILED DESCRIPTION

[0021] For a better understanding of the present application, various aspects of the present application will be described in more detail below with reference to the accompanying drawings. It is to be understood that the detailed description is merely descriptive of exemplary embodiments of the present application and is not intended to limit the scope of the present application in any way. Throughout the specification, like reference numerals refer to like elements.

[0022] In the drawings, the thickness, size, and shape of objects have been exaggerated slightly for ease of explanation. The drawings are merely examples and are not strictly drawn to scale.

[0023] It should also be understood that the terms "comprise", "comprising", "have", "having", "include", "including", "contain", "containing", when used in this specification, indicate the presence of the stated features, integers, steps, operations, elements, and / or components but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof. The terms "first", "second", and the like, are used merely to distinguish different elements or components, and do not necessarily indicate relative importance or quantity. Unless otherwise stated, the meaning of "a" or "an" is that there is one or more.

[0024] Furthermore, it should be pointed out that the terms "mounting", "arrangement", "provided with", "connected", "linked" should be interpreted broadly. For example, it can be a fixed connection, detachable connection, or integral construction; 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 an internal connection between two devices, elements or components; it can be directly arranged on another component, or there can be another intermediate component. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the application herein is only for the purpose of describing specific embodiments and is not intended to limit the application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0025] As Figures 1 to 4 shown, the application discloses a discharge structure for a sewage tank, comprising a tank body 1, a separation chamber 11 is arranged in the tank body 1, the sewage tank is installed on a cleaning device such as a scrubber, mainly used for collecting and storing the mixture generated after cleaning operation, the tank body 1 of the sewage tank is provided with a separation chamber 11, the mixture sucked by the cleaning device is transported into the separation chamber 11 for gas-liquid-solid three-phase separation, the separation chamber 11 is provided with a tangential first inlet 111, the separation chamber 11 is communicated with the inside of the tank body 1 through the first inlet 111, the mixture in the tank body 1 enters the separation chamber 11 through the first inlet 111 to realize cyclone separation, the top of the separation chamber 11 is provided with an exhaust port, the side wall of the separation chamber 11 is communicated with a first channel 12, the gas after cyclone separation is discharged through the exhaust port, and the solid-liquid mixture after cyclone separation is discharged from the separation chamber 11 through the first channel 12; the separation chamber 11 is provided with a tangential first inlet 111, this design makes the mixture produce cyclone effect when entering the separation chamber 11, the mixture can enter the separation chamber 11 in the form of high-speed rotation, and the heavier liquid and dust are pushed to the chamber wall by centrifugal force, while the lighter gas is concentrated to the center, realizing efficient separation, the top of the separation chamber 11 is provided with an exhaust port for discharging the lighter gas after cyclone separation, and the heavier liquid and dust cyclone-separated to the side wall of the separation chamber 11 can be directly discharged through the first channel 12 communicated with the side wall of the separation chamber 11, greatly improving the separation efficiency of the separation chamber 11.

[0026] More specifically, as Figure 2As shown, the separation cavity 11 includes a filtering chamber 112 and a cyclone chamber 113, the filtering chamber 112 is used for preliminary separation of the mixture, the filtering chamber 112 is provided with a first outlet 114 in communication with the inside of the box 1, and the first inlet 111 is arranged on the side wall of the cyclone chamber 113. The separation cavity 11 is provided with two independent chambers of the filtering chamber 112 and the cyclone chamber 113. The filtering chamber 112 is used to receive the mixture sucked by the cleaning device and to preliminarily separate the mixture. The mixture is separated into solid matter and fluid by the filtering chamber 112. The solid matter is left in the filtering chamber 112, and the fluid is discharged from the filtering chamber 112 through the first outlet 114 to enter the box 1. The fluid entering the box 1 can be automatically gas-liquid separated under the action of gravity, so that most of the liquid is left in the box 1 due to gas-liquid separation. The fluid with a small amount of liquid enters the cyclone chamber 113 through the first inlet 111, avoiding too much liquid in the cyclone chamber 113 affecting the separation efficiency. The separation cavity 11 realizes a multi-stage separation mechanism through the cooperation of the filtering chamber 112 and the cyclone chamber 113, improves the overall separation efficiency, optimizes the space utilization, and makes the entire device more compact.

[0027] More specifically, as shown in Figure 2 The cyclone chamber 113 and the filtering chamber 112 are arranged in an upper and lower distribution. One end of the first channel 12 is connected with the cyclone chamber 113, and the other end of the first channel 12 is connected with the filtering chamber 112. The cyclone chamber 113 is arranged above the filtering chamber 112. The upper and lower distribution design effectively utilizes the vertical space, so that the structure distribution in the sewage tank is more compact, and the fluid discharged from the filtering chamber 112 into the box 1 can naturally sink to the bottom of the box 1 due to gravity, and the separated lighter gas can flow upward to the first inlet 111 to enter the cyclone chamber 113, so that the gas-liquid separation efficiency is higher. By arranging the first channel 12 to connect the upper and lower distributed cyclone chamber 113 and filtering chamber 112, the liquid and dust separated by the cyclone chamber 113 can be directly discharged into the filtering chamber 112 for collection through the first channel 12, which improves the separation efficiency, optimizes the space utilization, and makes the overall structure more compact.

[0028] More specifically, as shown in Figure 2 and Figure 4As shown, a second outlet 115 communicating with the first channel 12 is provided in the cyclone chamber 113. The second outlet 115 is located at the top of the side wall of the cyclone chamber 113, and the first inlet 111 is located at the bottom of the side wall of the cyclone chamber 113. The liquid and dust separated in the cyclone chamber 113 are discharged into the first channel 12 through the second outlet 115. The first inlet 111 is located at the bottom of the side wall of the cyclone chamber 113, and the second outlet 115 is located at the top of the side wall of the cyclone chamber 113, so that the fluid enters from the bottom of the cyclone chamber 113, which can more fully rotate and separate at high speed. During the high-speed rotation, the fluid maintains full contact and collision with the side wall of the cyclone chamber 113. Gas, liquid and solid are discharged only after rotating to the top of the cyclone chamber 113, resulting in higher separation efficiency.

[0029] More specifically, such as Figure 2 and Figure 4 As shown, the first channel 12 is provided with a first branch 121 and a second branch 122. One end of the first branch 121 and one end of the second branch 122 are both connected to the cyclone chamber 113, and the other end of the first branch 121 and the other end of the second branch 122 are both connected to the filter chamber 112. The first channel 12 is divided into a first branch 121 and a second branch 122. Each branch is used to connect the cyclone chamber 113 and the filter chamber 112. The liquid and solids separated in the cyclone chamber 113 flow into the filter chamber 112 through the first branch 121 and / or the second branch 122. The dual-branch design allows more liquids and solids to flow into the filter chamber 112 from the cyclone chamber 113 at the same time, which improves the overall processing efficiency and provides greater flexibility.

[0030] More specifically, such as Figure 2 and Figure 4 As shown, one end of the first branch 121 is connected to one end of the second branch 122. The first branch 121 and the second branch 122 are arranged in an inverted V shape. The first branch 121 and the second branch 122 are connected to each other to form an inverted V-shaped junction point. Starting from the junction point, the first branch 121 and the second branch 122 extend downwards respectively to form the two sides of the inverted V. The inverted V-shaped distribution helps to evenly distribute the liquid and solid substances flowing out of the cyclone chamber 113, improve the flow efficiency, and reduce the risk of blockage.

[0031] More specifically, such as Figure 2 As shown, the first inlet 111 and the first channel 12 are arranged opposite to each other. The arrangement of the first inlet 111 and the first channel 12 on opposite sides of the cyclone chamber 113 helps to enhance the effect of centrifugal force, thereby improving the separation efficiency of solids and liquids. Furthermore, the opposite arrangement simplifies the structural design of the cyclone chamber 113, helps to balance the pressure distribution within the cyclone chamber 113, and enhances the stability and durability of the overall structure.

[0032] More specifically, as shown in Figure 2 The separation cavity 11 is in a barrel structure, and is detachably connected to the box body 1. The separation cavity 11 is provided with an openable bottom plate 116. The separation cavity 11 is designed in a barrel structure, which provides a larger internal space and is conducive to the cyclone separation process of the mixture. The separation cavity 11 is detachably connected to the box body 1, allowing the separation cavity 11 to be detached from the box body 1. By taking out the separation cavity 11 from the box body 1, the solid matter can be separated from the sewage tank for cleaning, and the sewage can be directly poured through the box body 1, achieving the purpose of separate cleaning of solid and liquid. The openable bottom plate 116 can be opened or closed as needed, making it easier to clean and maintain the inside of the separation cavity 11. The user can directly open the bottom plate 116 to clean the solid waste or sediment in the separation cavity 11. The solid waste has a certain weight and can fall by itself under the action of gravity after the bottom plate 116 is opened, without the need for manual cleaning, improving the user experience.

[0033] More specifically, as shown in Figure 2 The side wall of the filter chamber 112 is configured as a partition plate 1121. The filter chamber 112 is separated from the first channel 12 by the partition plate 1121. The mixture in the first channel 12 is stored and released through the bottom plate 116. The side wall of the filter chamber 112 is configured as a partition plate 1121 that can separate the first channel 12, so that the filter chamber 112 and the first channel 12 are not in communication, avoiding the influence of gas flow on the cyclone separation effect of the cyclone chamber 113. The first channel 12 is connected to the filter chamber 112 through the partition plate 1121, so that the solid and liquid entering the first channel 12 can be stored through the bottom plate 116 and fall by themselves after the bottom plate 116 is opened, without the need for manual cleaning by the user. On the other hand, the side wall of the filter chamber 112 and the side wall of the cyclone chamber 113 are integrally formed, which is a simpler structure with better sealing performance.

[0034] As shown in Figures 1 to 5As shown, the embodiment also discloses a cleaning device, comprising any one of the foregoing discharge structures for the sewage tank, wherein the cleaning device comprises a main machine 2 and a floor brush assembly 3, the floor brush assembly 3 and the sewage tank are both installed on the main machine 2, the sewage tank is detachably installed on the main machine 2 through the tank body 1, so that the user can detach the sewage tank from the cleaning device for cleaning, the sewage tank is connected and communicated with the floor brush assembly 3, the mixture sucked by the floor brush assembly 3 is transported to a separation cavity 11 in the sewage tank, the mixture is subjected to three-phase separation of gas-liquid-solid through the separation cavity 11, the separation cavity 11 is provided with a tangential first inlet 111, this design makes the mixture produce a cyclone effect when entering the separation cavity 11, the mixture can enter the separation cavity 11 in a high-speed rotating manner, the heavier liquid and dust are pushed to the cavity wall by centrifugal force, while the lighter gas is concentrated to the center, realizing efficient separation, an exhaust port is arranged at the top of the separation cavity 11, for discharging the lighter gas after cyclone separation, and the heavier liquid and dust separated to the side wall of the separation cavity 11 by cyclone can all be directly discharged through the first channel 12 communicated with the side wall of the separation cavity 11, greatly improving the separation efficiency of the separation cavity 11.

[0035] The present application is not limited to the above best mode of implementation, and anyone can derive other various forms of products under the inspiration of the present application, but regardless of any changes in shape or structure, any technical solution with the same or similar to the present application falls within the scope of protection of the present application.

Claims

1. A drain structure for a sewage tank, characterized by, The utility model provides a kind of sewage tank's discharge structure, including box (1), the box (1) is provided with separation cavity (11) inside, the separation cavity (11) is provided with tangential first inlet (111), the separation cavity (11) is communicated with the inside of box (1) by first inlet (111), the mixture in the box (1) enters separation cavity (11) by first inlet (111) to realize cyclone separation, the top of the separation cavity (11) is provided with exhaust port, the lateral wall of the separation cavity (11) is communicated with first channel (12), and the gas after cyclone separation is discharged by exhaust port, and the solid-liquid mixture after cyclone separation is discharged from separation cavity (11) by first channel (12).

2. A drain arrangement for a sewage tank as claimed in claim 1, wherein, The separation cavity (11) includes a filter chamber (112) and a cyclone chamber (113), the filter chamber (112) is used for preliminary separation of the mixture, and the filter chamber (112) is provided with a first outlet (114) communicated with the inside of the box (1), and the first inlet (111) is arranged on the lateral wall of the cyclone chamber (113).

3. A drain arrangement for a sewage tank as claimed in claim 2, wherein, The cyclone chamber (113) and the filter chamber (112) are arranged in an up-down distribution, one end of the first channel (12) is connected with the cyclone chamber (113), and the other end of the first channel (12) is connected with the filter chamber (112).

4. A drain arrangement for a sewage tank as claimed in claim 2, wherein, The cyclone chamber (113) is provided with a second outlet (115) communicated with the first channel (12), the second outlet (115) is located at the top of the lateral wall of the cyclone chamber (113), and the first inlet (111) is located at the bottom of the lateral wall of the cyclone chamber (113).

5. A drain arrangement for a sewage tank as claimed in claim 3, wherein, The first channel (12) is provided with a first branch (121) and a second branch (122), one end of the first branch (121) and one end of the second branch (122) are connected with the cyclone chamber (113), and the other end of the first branch (121) and the other end of the second branch (122) are connected with the filter chamber (112).

6. A drain arrangement for a sewage tank as claimed in claim 5, wherein, One end of the first branch (121) and one end of the second branch (122) are connected, and the first branch (121) and the second branch (122) are arranged in an inverted V-shaped distribution.

7. A drain arrangement for a sewage tank as claimed in claim 2, wherein, The first inlet (111) and the first channel (12) are arranged in an opposite distribution.

8. A drain arrangement for a sewage tank as claimed in claim 2, wherein, The separation cavity (11) is in a barrel-shaped structure, the separation cavity (11) is detachably connected with the box (1), and the separation cavity (11) is provided with an openable and closable bottom plate (116).

9. A drain arrangement for a sewage tank as claimed in claim 8, wherein, The lateral wall of the filter chamber (112) is configured as a partition plate (1121), the filter chamber (112) is separated from the first channel (12) by the partition plate (1121), and the mixture in the first channel (12) is stored and released by the bottom plate (116).

10. A cleaning apparatus, characterized by The utility model provides a kind of sewage tank's discharge structure, including the discharge structure of any one of claims 1-9.

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