Sewage circulating filtering device for scrubber

Abstract

The utility model discloses a sewage circulating and filtering device for a scrubber, which belongs to the technical field of sewage circulation and comprises a water tank, a water suction pipe, an air suction motor, a filter element device, a hollow shaft motor, a water outlet pipe and a water pump, a first three-way valve and a reducing pipeline are arranged at an air outlet of the air suction motor, and a second three-way valve is arranged at the middle section of the water outlet pipe. The air recoil function that an existing air suction motor of the scrubber is used as an air source is achieved, and large air source equipment does not need to be additionally arranged; meanwhile, the ozone generator and matched structures such as a three-way valve, an air pipe and a jet device are additionally arranged, so that sterilization, decontamination and peculiar smell removal treatment of ozone on the filter element and circulating water is realized. The utility model solves the technical problems of membrane pollution, filter element blockage caused by microorganism breeding and peculiar smell generation in the water circulation filtration system of the existing scrubber, and difficulty in application of the air back-flushing technology due to space limitation of the scrubber.

Description

A wastewater circulation and filtration device for floor scrubbers Technical Field

[0001] This utility model relates to the field of wastewater recycling technology, and in particular to a wastewater recycling and filtration device for floor scrubbers. Background Technology

[0002] Existing floor scrubbers mainly consist of a water tank, brush, and suction device. The suction device primarily uses a suction motor to create negative pressure in the wastewater tank, then draws water from the floor into the tank via a suction pipe. With the development of automation in the floor scrubber industry, circulating filtration floor scrubbers have gradually been adopted in the market. For example, Chinese patent application CN223831014U describes a water circulation device for a floor scrubber. By introducing a filtration device, only one water tank is needed, and the filtration device is rotated for cleaning, extending the water circulation and filtration time, thus ensuring the floor scrubber can operate for extended periods.

[0003] However, when treating surface wastewater, the presence of large amounts of bacteria, microorganisms, colloids, and fine suspended solids in the wastewater causes frequent membrane pore blockage. Although the filter cartridge can separate and remove large particles of sludge during rotation, the membrane surface still readily adsorbs colloids, microorganisms, and fine contaminants. Furthermore, the continuous proliferation of bacteria and microorganisms on the membrane surface not only accelerates blockage but also produces odors, severely impacting the cleaning quality and operational stability of the equipment. Therefore, effectively controlling membrane fouling and reducing microbial adhesion is crucial for improving the stability and lifespan of a floor scrubber's reclaimed water system.

[0004] In existing technologies, backwashing is a common method to alleviate membrane clogging. However, traditional water pressure backwashing is limited by factors such as unstable on-site water pressure, differences in pipe diameter, and uneven water flow distribution, making it difficult to consistently control the cleaning effect. Furthermore, water pressure backwashing has limited ability to remove colloids and biofilms, and its overall efficiency is far inferior to air backwashing. However, air backwashing requires additional air source equipment (such as a blower), and floor scrubbers themselves are compact and space-constrained, making it impossible to install large air source devices, which greatly limits the practical application of air backwashing technology.

[0005] Therefore, there is an urgent need in this field for a filtration and circulation device that can effectively treat colloids, microorganisms and fine contaminants adsorbed on the membrane surface. Summary of the Invention

[0006] This utility model addresses the shortcomings of existing technologies by providing a wastewater circulation filtration device for floor scrubbers. It solves the technical problems of easy clogging of filter elements and generation of odors in existing floor scrubber water circulation filtration systems, as well as the difficulty in applying air backflushing technology due to space limitations. It achieves air backflushing without the need for additional large air source equipment, and simultaneously completes sterilization, decontamination, and odor removal treatment of the filter element and circulating water.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A wastewater circulation and filtration device for a floor scrubber includes a water tank, a suction pipe, a suction motor, a filter element device, a hollow shaft motor, a water outlet pipe, and a water pump. The suction motor is connected to the water tank via an air pipe, and the suction pipe is also connected to the water tank. The suction motor creates negative pressure in the water tank to draw wastewater back into the water tank through the suction pipe. The filter element device is installed inside the water tank. One end of the hollow shaft of the hollow shaft motor is fixedly connected to the water outlet of the filter element device and drives the filter element device to rotate. The other end of the hollow shaft is connected to the water outlet pipe. The water outlet pipe is connected to the water pump.

[0009] The exhaust port of the suction motor is equipped with a first three-way valve. One end of the channel of the first three-way valve is connected to the exhaust port of the suction motor, and the other two ends of the channel of the first three-way valve are exhaust ports, which can directly exhaust the suction motor. The third end of the channel of the first three-way valve is connected to a reducing pipe. The middle section of the water outlet pipe is connected to a second three-way valve. The first and second ends of the channel of the second three-way valve are respectively connected to the two sections of the water outlet pipe, and the third end of the channel of the second three-way valve is connected to the end of the reducing pipe away from the first three-way valve.

[0010] Preferably, the wastewater circulation filtration device further includes an ozone generator, the outlet of which is connected to a third three-way valve; one end of the channel of the third three-way valve is connected to the outlet of the ozone generator, the two ends of the channel of the third three-way valve are connected to a first air pipe, and the three ends of the channel of the third three-way valve are connected to a second air pipe.

[0011] The end of the first air pipe away from the third three-way valve is connected to the water outlet pipe through a three-way pipe, and a one-way valve is provided at the connection between the first air pipe and the three-way pipe to prevent water in the water outlet pipe from flowing back into the ozone generator.

[0012] The end of the second air pipe away from the third three-way valve is connected to the water outlet pipe through an ejector. The air inlet of the ejector is connected to the second air pipe. The ejector is embedded in the water outlet pipe. The nozzle end and tail pipe of the ejector are set along the water flow direction of the water outlet pipe. The venturi effect of the ejector is used to make ozone and circulating water fully mixed.

[0013] Preferably, the variable diameter pipe is a tapered pipe with a larger diameter at the end near the first three-way valve and a smaller diameter at the end near the second three-way valve, which can pressurize the airflow discharged from the suction motor and improve the cleaning effect of the air backflushing.

[0014] In the above technical solution, the present invention has the following beneficial effects:

[0015] This invention utilizes the existing suction motor of the floor scrubber as the air source for air backwashing. Through the cooperation of the first three-way valve, the reducing pipe, and the second three-way valve, the exhaust gas from the suction motor is introduced into the water outlet pipe and sent back to the filter element device to achieve air backwashing cleaning. There is no need to add additional large air source equipment such as blowers. It is perfectly adapted to the compact structure and limited space layout requirements of floor scrubbers, effectively solving the application limitations of air backwashing technology in floor scrubbers. Moreover, the air backwashing cleaning efficiency is much higher than that of traditional water pressure backwashing, which can effectively remove colloids and biofilms on the surface of the filter membrane and alleviate membrane pore blockage.

[0016] This utility model adds an ozone generator and supporting structures such as a third three-way valve, a first air pipe, a second air pipe, and an ejector. Ozone can enter the circulating water system through two paths: one is to directly enter the outlet pipe through the first air pipe, and the other is to fully mix with the circulating water through the second air pipe and the ejector. Ozone has strong oxidizing properties and can effectively kill bacteria and microorganisms on the surface of sewage and filter elements, thereby reducing filter element clogging and odor problems caused by microbial reproduction from the root. At the same time, it can oxidize and decompose colloidal and fine organic pollutants in sewage, further improving the filtration effect.

[0017] This invention features a one-way valve on the first air pipe to effectively prevent circulating water in the outlet pipe from flowing back into the ozone generator, thus avoiding damage to the ozone generator due to water ingress and improving the operational stability of the device. The jet nozzle utilizes the Venturi effect to ensure thorough mixing of ozone and circulating water, enhancing the sterilization and decontamination efficiency of the ozone. The tapered reducer can pressurize the exhaust gas from the suction motor, enhancing the cleaning effect of the backwash. The coordinated operation of all components significantly improves the stability and service life of the floor scrubber's circulating reclaimed water system.

[0018] The device of this utility model has a high degree of integration. It is based on the existing circulating filtration structure of floor scrubbers and has been partially improved. The modification cost is low, it is easy to promote industrialization, and it is easy to operate. It can flexibly switch between normal filtration, air backwash cleaning, ozone sterilization and other working modes by controlling the on and off of each three-way valve. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0020] Figure 1 is a schematic diagram of the overall structure of the wastewater circulation and filtration device for a floor scrubber provided in an embodiment of the present invention;

[0021] Figure 2 is a schematic diagram of the structure of the wastewater circulation and filtration device for a floor scrubber with the water tank hidden, provided in an embodiment of this utility model.

[0022] Explanation of reference numerals in the attached figures:

[0023] 1-Water tank, 2-Suction pipe, 3-Suction motor, 4-Filter device, 5-Hollow shaft motor, 6-Water outlet pipe, 7-Water pump, 8-First three-way valve, 9-Reducing pipe, 10-Second three-way valve, 11-Ozone generator, 12-Third three-way valve, 13-First air pipe, 14-Second air pipe, 15-One-way valve, 16-Ejector. Detailed Implementation

[0024] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0025] It should be noted that the terms "inner", "above", "bottom", etc. used herein indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the purpose of illustrative purposes and are not intended to 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, they should not be construed as limitations on this utility model. In addition, the terms "first", "second", etc. are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0026] See Figures 1 and 2;

[0027] This embodiment provides a wastewater circulation and filtration device for a floor scrubber, including a water tank 1, a suction pipe 2, a suction motor 3, a filter cartridge 4, a hollow shaft motor 5, a water outlet pipe 6, a water pump 7, and an ozone generator 11. The connection relationships of each component are as follows:

[0028] The suction motor 3 is connected to the water tank 1 through an air pipe. One end of the suction pipe 2 is connected to the bottom of the water tank 1, and the other end is used to connect to the water inlet of the floor scrubber. When the suction motor 3 is working, it creates a negative pressure in the water tank 1, which draws the sewage from the ground into the water tank 1 through the suction pipe 2. In this embodiment, the filter element device 4 is vertically installed in the water tank 1 to filter the sewage in the water tank. The hollow shaft motor 5 is installed on the top of the water tank 1, and its hollow shaft extends downward and is fixedly connected to the outlet of the filter element device 4. The hollow shaft motor 5 can drive the filter element device 4 to rotate, thereby achieving centrifugal preliminary decontamination.

[0029] The upper end of the hollow shaft of the hollow shaft motor 5 is connected to one end of the water outlet pipe 6, and the other end of the water outlet pipe 6 is connected to the water inlet of the water pump 7. The water outlet of the water pump 7 is used to connect to the water supply port of the brush plate of the floor scrubber. The filtered clean water is sent to the brush plate through the water outlet pipe 6 and the water pump 7.

[0030] The exhaust port of the suction motor 3 is equipped with a first three-way valve 8, which is an electric three-way valve. One end of its channel is sealed and connected to the exhaust port of the suction motor 3, the second end of its channel is an atmospheric exhaust port, and the third end of its channel is sealed and connected to the large diameter end of the tapered reducing pipe 9. The middle section of the water outlet pipe 6 is equipped with a second three-way valve 10, which is an electric three-way valve. The first and second ends of its channel are sealed and connected to the two sections of the water outlet pipe 6, respectively, and the third end of its channel is sealed and connected to the small diameter end of the reducing pipe 9.

[0031] Ozone generator 11 is installed in the control cavity of the floor scrubber. Its air outlet is sealed and connected to a third three-way valve 12. The third three-way valve 12 is an electric three-way valve. Its two ends are sealed and connected to a first air pipe 13, and its three ends are sealed and connected to a second air pipe 14. The free end of the first air pipe 13 is connected to the end of the water outlet pipe 6 near the hollow shaft motor 5 through a three-way pipe. A one-way valve 15 is installed on the first air pipe 13. The conduction direction of the one-way valve 15 is from the third three-way valve 12 to the water outlet pipe 6. In order for ozone to enter effectively, the first air pipe 13 is connected to the three-way pipe and the water outlet pipe 6 at an angle of less than 90°. The free end of the second air pipe 14 is sealed and connected to the air inlet of the jet injector 16. The jet injector 16 is embedded in the end of the water outlet pipe 6 near the water pump 7. The nozzle end of the jet injector 16 faces the water pump 7 and is consistent with the water flow direction of the water outlet pipe 6.

[0032] The device in this embodiment has three operating modes, which are switched by controlling the on / off state of each electric three-way valve through the control system of the floor scrubber:

[0033] 1. Normal filtration mode: The first three-way valve 8 has its first and second channels open and its third channel closed, allowing exhaust from the suction motor 3 to be discharged directly from the exhaust port; the second three-way valve 10 has its first and second channels open and its third channel closed; the third three-way valve 12 can be switched on or off as needed, allowing the ozone generator 11 to be turned on as required. The suction motor 3 draws wastewater from the ground into the water tank 1, and the filter cartridge 4 rotates and filters the wastewater under the drive of the hollow shaft motor 5. The filtered clean water is then sent to the brush plate through the hollow shaft, the outlet pipe 6, and the water pump 7, achieving normal water circulation filtration.

[0034] 2. Air backwash cleaning mode: The first three-way valve 8 has its first and third channels open and its second channel closed. The exhaust from the suction motor 3 is pressurized through the reducer pipe 9 and enters the outlet pipe 6 through the third channel of the second three-way valve 10. The airflow is then sent in reverse along the outlet pipe to the outlet of the filter element device 4. The airflow passes through the membrane of the filter element device in reverse, realizing air backwash cleaning and blowing off the colloids, microorganisms and fine dirt adsorbed on the membrane surface. At this time, the third three-way valve 12 can be closed and the ozone generator 11 stops working.

[0035] 3. Ozone Sterilization Mode: When the ozone generator 11 is turned on, the third three-way valve 12 can be selected to open channels one and two or channels one and three. When combined with the air backwash cleaning mode to achieve the synergistic operation of air backwash and ozone sterilization, when channels one and two are open, ozone enters the outlet pipe 6 directly through the first air pipe 13 and the one-way valve 15, and is sent back to the filter element device 4 to sterilize the surface of the filter element. During normal filtration, channels one and three can be open, and ozone enters the jet injector 16 through the second air pipe 14. Under the Venturi effect of the jet injector, it is fully mixed with the circulating water in the outlet pipe and sent to the brush plate with the circulating water to sterilize the circulating water and the cleaned floor, remove odors, and improve the cleaning and sterilization effect.

[0036] It should be noted that, to ensure the cleanliness of the air drawn in by the suction motor, an air filter structure can be added at the connection between the suction motor and the water tank. If the space occupied by the wastewater circulation filtration device is not a concern in the application scenario, other air sources can also be used for air flushing.

[0037] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A wastewater circulation filtration device for a floor scrubber, comprising a water tank (1), a suction pipe (2), a suction motor (3), a filter element device (4), a hollow shaft motor (5), a water outlet pipe (6), and a water pump (7), wherein the suction motor (3) is connected to the water tank (1) via an air pipe, the suction pipe (2) is connected to the water tank (1), and the suction motor (3) creates a negative pressure in the water tank (1) to draw wastewater back into the water tank (1) through the suction pipe (2); the filter element device (4) is disposed in the water tank (1), one end of the hollow shaft of the hollow shaft motor (5) is fixedly connected to the water outlet of the filter element device (4) and drives the filter element device to rotate, and the other end of the hollow shaft is connected to the water outlet pipe (6); the water outlet pipe (6) is connected to the water pump (7); characterized in that, The exhaust port of the suction motor (3) is provided with a first three-way valve (8). One end of the channel of the first three-way valve (8) is connected to the air outlet of the suction motor (3). The two ends of the channel of the first three-way valve (8) are exhaust ports, which can directly exhaust the suction motor (3). The three ends of the channel of the first three-way valve (8) are connected to a reducing pipe (9). The middle section of the water outlet pipe (6) is connected to a second three-way valve (10). The first and second ends of the channel of the second three-way valve (10) are respectively connected to the two sections of the water outlet pipe (6). The three ends of the channel of the second three-way valve (10) are connected to the end of the reducing pipe (9) away from the first three-way valve (8).

2. The wastewater circulation filtration device according to claim 1, characterized in that: It also includes an ozone generator (11), the outlet of which is connected to a third three-way valve (12); one end of the channel of the third three-way valve (12) is connected to the outlet of the ozone generator (11), the two ends of the channel of the third three-way valve (12) are connected to a first air pipe (13), and the three ends of the channel of the third three-way valve (12) are connected to a second air pipe (14); the end of the first air pipe (13) away from the third three-way valve (12) is connected to a three-way pipe. The water outlet pipe (6) is connected, and the first air pipe (13) is equipped with a one-way valve (15) at the connection with the three-way pipe; the end of the second air pipe (14) away from the third three-way valve (12) is connected to the water outlet pipe (6) through the jet ejector (16), the air inlet of the jet ejector (16) is connected to the second air pipe (14), the jet ejector (16) is embedded in the pipeline of the water outlet pipe (6), and the nozzle end of the jet ejector (16) and the tail pipe are set along the water flow direction of the water outlet pipe (6).

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