Anti-backflow structure of sewage tank

Abstract

An anti-backflow structure of a sewage tank comprises a tank body and a tank cover arranged at an opening of the tank body in a sealing and covering mode, a suction opening is formed in the tank cover, the bottom side of the tank cover is connected with a water retaining cover capable of extending into the tank body, the bottom side of the water retaining cover is connected with a filter plate capable of being connected with the inner wall of the tank body in a sealing mode, and solid-liquid filter screen holes are formed in the filter plate. A backflow hole is further formed in the filter plate, a drainage cover corresponding to the backflow hole is arranged on the side wall of the water retaining cover, and the drainage direction of the drainage cover is perpendicular to the drainage direction of the backflow hole and faces the inner side of the water retaining cover. According to the anti-backflow structure of the sewage tank, the backflow hole is formed in the position, away from the user use side, of the filter plate, the drainage cover corresponding to the backflow hole is arranged on the side wall of the water retaining cover, and the drainage direction of the drainage cover is perpendicular to the drainage direction of the backflow hole; in other words, when backward flowing occurs, the backflow sewage cannot directly flow towards the suction port, and the sewage can be prevented from being directly sucked into the vacuum motor.

Description

Technical Field

[0001] The utility model relates to the technical field of cleaning equipment, and particularly relates to an anti-backflow structure for a sewage tank. Background Art

[0002] At present, the structure of a portable floor washer on the market is as follows: it includes a cleaning main body and a handle rod, and the cleaning main body and the handle rod are connected by a universal joint. A water tank, a sewage tank, a vacuum pump and other devices are installed on the handle rod. The structure of its sewage tank is mostly like this: it includes a box body, a box opening is formed on the box body, a water inlet pipe part and an air extraction pipe part are formed on the box body, the air extraction pipe part extends into the box body, and the air extraction pipe part is between the water inlet pipe part and the box opening; when in use, the sewage tank is installed on the handle rod of the floor washer, a vacuum pump is installed below the sewage tank, the water inlet pipe part of the sewage tank is communicated with the sewage suction hole arranged on the cleaning main body through a water pipe, and the air extraction pipe part of the sewage tank is communicated with the air extraction port of the vacuum pump through an air passage, and the air passage is a cavity formed in the handle rod. The function of the sewage tank is to collect the sewage generated by the cleaning main body during the cleaning process. The sewage tank sucks the air in the box body from the air extraction pipe part of the box body through the vacuum pump, so that a negative pressure is formed in the sewage tank to suck away the sewage generated by the cleaning main body during the cleaning process.

[0003] During actual use, cleaning dead corners such as under the bed are often encountered, and it is necessary for the user to operate the cleaning equipment to lie flat for use. In this use state, the sewage in the sewage tank is very likely to flow back into the vacuum motor, thereby affecting the service life of the vacuum motor.

[0004] Therefore, in view of the deficiencies of the existing technology, it is necessary to design an anti-backflow structure for a sewage tank to solve the above problems. Summary of the Utility Model

[0005] In order to overcome the above deficiencies in the existing technology, the purpose of the utility model is to provide an anti-backflow structure for a sewage tank.

[0006] To achieve the above purpose and other related purposes, the technical solution provided by the utility model is: an anti-backflow structure for a sewage tank, which includes a box body and a box cover hermetically covered on the opening of the box body. A suction port is arranged on the box cover. A water blocking cover that can extend into the box body is connected to the bottom side of the box cover. A filter plate that can be hermetically connected to the inner wall of the box body is connected to the bottom side of the water blocking cover. The filter plate is provided with solid-liquid filtering mesh holes, and a return hole is also arranged on the filter plate. A diversion cover corresponding to the return hole is arranged on the side wall of the water blocking cover, and the diversion direction of the diversion cover is perpendicular to the diversion direction of the return hole and is arranged towards the inside of the water blocking cover.

[0007] A preferred technical solution is: a flip cover is hinged to the bottom side of the filter plate, and the flip cover is arranged corresponding to the solid-liquid filtering mesh holes.

[0008] The preferred technical solution is that the hinged side of the flip cover is arranged away from the user's using side.

[0009] The preferred technical solution is that the return hole is arranged away from the user's using side.

[0010] The preferred technical solution is that a sewage suction port is provided at the bottom side of the box body, the sewage suction port extends inwards to form a sewage suction pipe, an opening structure for the sewage suction pipe to pass through is provided on the filter plate, and the end of the sewage suction pipe is inserted into the water baffle through the opening structure.

[0011] Due to the application of the above technical solution, the beneficial effects of the present utility model are:

[0012] A sewage tank anti-backflow structure proposed by the present utility model, by arranging a return hole at a position on the filter plate away from the user's using side, and arranging a diversion cover corresponding to the return hole on the side wall of the water baffle, the diversion direction of the diversion cover is perpendicular to the diversion direction of the return hole; that is, when backflow occurs, the backflow sewage will not directly flow towards the suction port, and the sewage can be prevented from being directly sucked into the vacuum motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic internal structure diagram of the sewage tank related to the present utility model from one perspective.

[0014] Figure 2 It is a schematic internal structure diagram of the sewage tank related to the present utility model from another perspective.

[0015] Figure 3 It is Figure 2 the enlarged schematic diagram of A in DETAILED DESCRIPTION OF THE EMBODIMENTS

[0016] The following specific embodiments illustrate the implementation manners of the present utility model, and those skilled in the art can easily understand other advantages and effects of the present utility model from the content disclosed in this specification.

[0017] Please refer to Figures 1 - 3Note that in the description of the present utility model, it should be noted that for the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the utility model product is customarily placed during use. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model. In addition, the terms "first", "second", "third", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance. The terms "horizontal", "vertical", "hanging", etc. do not mean that the components are required to be absolutely horizontal or hanging, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0018] In the description of the present utility model, it should also be noted that unless otherwise clearly specified and defined, the terms "set", "installed", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection. It can be a mechanical connection or an electrical connection. It can be directly connected or indirectly connected through an intermediate medium. It can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0019] Embodiment:

[0020] As Figures 1 to 3 shown, according to a general technical concept of the present utility model, a sewage tank anti-backflow structure is provided, which includes a box body 1 and a box cover 2 hermetically covered at the opening of the box body 1. A suction port 21 is provided on the box cover 2. A water blocking cover 3 that can extend into the box body is connected to the bottom side of the box cover 2. A filter plate 4 that can be hermetically connected to the inner wall of the box body 1 is connected to the bottom side of the water blocking cover 3. The filter plate 4 is provided with solid-liquid filter holes, and a return hole 42 is also provided on the filter plate. A diversion cover 31 corresponding to the return hole 42 is provided on the side wall of the water blocking cover 3. The diversion direction of the diversion cover 31 is perpendicular to the diversion direction of the return hole 42 and is arranged towards the inside of the water blocking cover 3. By providing the return hole 42 and the diversion cover 31, the flow direction of the sewage flowing back to the upper side of the filter plate 4 can be changed, preventing it from directly flowing to the suction port 21 and being sucked in by the vacuum motor.

[0021] As Figures 1 to 3As shown, in an exemplary embodiment of the present utility model, a flip cover 5 is hinged to the bottom side of the filter plate 4, and the flip cover 5 is arranged corresponding to the solid-liquid filter mesh holes. The hinged side of the flip cover 5 is arranged away from the user side. In the lying state, the sewage presses the flip cover 5 tightly against the solid-liquid filter mesh holes, that is, the sewage cannot flow back to the upper side of the filter plate 4 through the solid-liquid filter mesh holes.

[0022] As Figures 1 to 3 shown, in an exemplary embodiment of the present utility model, the return hole 42 is arranged away from the user side. In the lying state, only when enough sewage is collected in the sewage tank, the sewage can submerge the return hole 42 and flow back to the upper side of the filter plate 4 through the return hole 42, that is, the possibility of sewage backflow is reduced.

[0023] As Figures 1 to 3 shown, in an exemplary embodiment of the present utility model, a sewage suction port is provided at the bottom side of the box body 1, the sewage suction port extends inward to form a sewage suction pipe, and an opening structure for the sewage suction pipe to pass through is provided on the filter plate 4. The end of the sewage suction pipe is inserted into the water baffle 3 through the opening structure. The vacuum motor forms a negative pressure in the box body 1 through the suction port 21, so that the sewage surges into the box body 1 through the end of the sewage suction pipe. The water baffle 3 is arranged between the sewage suction pipe and the suction port 21, which can prevent the sewage from being directly sucked into the vacuum motor through the suction port 21.

[0024] Therefore, the present utility model has the following advantages:

[0025] A sewage tank anti-backflow structure proposed by the present utility model, by arranging a return hole at a position on the filter plate away from the user side, and arranging a drainage cover corresponding to the return hole on the side wall of the water baffle, the drainage direction of the drainage cover is perpendicular to the drainage direction of the return hole; that is, when backflow occurs, the returned sewage will not flow directly towards the suction port, which can prevent the sewage from being directly sucked into the vacuum motor.

[0026] The above embodiments are only used to illustrate the principle and efficacy of the present utility model, rather than to limit the present utility model. Any person familiar with this technology can modify or change the above embodiments without departing from the spirit and scope of the present utility model. Therefore, all equivalent modifications or changes completed by those with ordinary knowledge in the technical field without departing from the spirit and technical idea disclosed by the present utility model should still be covered by the claims of the present utility model.

Claims

1. An anti-backflow structure for a sewage tank, comprising a tank body and a tank cover sealingly disposed at the opening of the tank body. A suction port is provided on the tank cover. A water baffle is connected to the bottom side of the tank cover and can extend into the tank body. A filter plate that can be sealingly connected to the inner wall of the tank body is connected to the bottom side of the water baffle. The filter plate is provided with solid-liquid filter mesh holes, and it is characterized in that: The filter plate is further provided with a reflux hole, and a drainage cover corresponding to the reflux hole is arranged on the side wall of the water baffle. The drainage direction of the drainage cover is perpendicular to the drainage direction of the reflux hole and is arranged towards the inside of the water baffle.

2. The anti-backflow structure of a sewage tank according to claim 1, wherein: A flip cover is hinged to the bottom side of the filter plate, and the flip cover is correspondingly arranged with the solid-liquid filtering mesh holes.

3. The anti-backflow structure of a sewage tank according to claim 2, characterized in that: The hinged side of the flip cover is arranged away from the user side.

4. The anti-backflow structure of a sewage tank according to claim 1, characterized in that: The reflux hole is arranged away from the user side.

5. The anti-backflow structure of a sewage tank according to claim 1, characterized in that: A sewage suction port is arranged at the bottom side of the box body. The sewage suction port extends inwards to form a sewage suction pipe. An opening structure for the sewage suction pipe to pass through is arranged on the filter plate, and the end of the sewage suction pipe is inserted into the water baffle through the opening structure.

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