Secondary water supply large water tank self-cleaning device and self-cleaning method

Abstract

The secondary water supply large water tank self-cleaning device comprises a water tank frame, a tank body is arranged in the water tank frame, an upper opening is formed in the center of the upper end of the tank body, an upper cover is in threaded connection with the outer portion of the upper end of the upper opening, and a water inlet pipe is connected to the center of the upper end of the upper cover; a plurality of spherical bulges are arranged on the side wall of the box body, side wall cleaning assemblies are arranged in the spherical bulges, the lower end of the box body communicates with a water collecting tank, and a bottom cleaning assembly is arranged in the water collecting tank. Comprising a side suction pump shell, a spiral pump blade, a side suction frame and a side brush frame, the cleaning brush is driven by the motor to rotate, the cleaning brush on the side brush frame directly scrapes the inner wall of the spherical bulge, meanwhile, the spiral pump blade sucks stripped silt and filters the silt through the side filter element, and the dual functions of sediment removal and water filtration are achieved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of secondary water supply tank self-cleaning, and particularly relates to a secondary water supply large tank self-cleaning device and a self-cleaning method. BACKGROUND

[0002] The conventional manual cleaning method needs to frequently empty the water tank and work inside, which is not only dangerous and inefficient, but also difficult to completely remove stubborn deposits. Some existing automatic cleaning devices on the market mostly use fixed nozzles or simple brushing structures, which cannot effectively deal with dirt on complex curved surfaces such as the spherical bulge of the water tank, and lack of sediment collection and filtration functions, so that the pollutants remain in the water after cleaning.

[0003] In view of the above problems, the present application provides a secondary water supply tank system which can realize comprehensive self-cleaning, filtration and easy maintenance, reduces operating costs while ensuring water quality safety, and improves water supply stability. SUMMARY

[0004] The purpose of the present application is to provide a secondary water supply large tank self-cleaning device and a self-cleaning method to solve the problem of traditional secondary water supply tank using manual cleaning, which is dangerous and inefficient.

[0005] To achieve the above purpose, the present application provides the following technical scheme: a secondary water supply large tank self-cleaning device, comprising a water tank frame, a tank body is arranged inside the water tank frame, an upper opening is arranged at the center of the upper end of the tank body, an upper cover is threadedly connected to the upper end of the upper opening, a water inlet pipe is connected to the center of the upper end of the upper cover, a plurality of spherical bulges are arranged on the side wall of the tank body, a side wall cleaning assembly is arranged inside each of the plurality of spherical bulges, a water collecting tank is connected to the lower end of the tank body, a bottom cleaning assembly is arranged inside the water collecting tank, a water supply pipe is connected to the center of the lower end of the water collecting tank, support legs are connected to the lower end of each corner of the water tank frame, a climbing ladder is connected to the front end of the water tank frame, a plurality of wire harness frames are connected to the outside of the water tank frame, a wire harness is arranged inside each of the plurality of wire harness frames, and the wire harness is electrically connected to an external control switch and a power supply through the wire harness, and each of the plurality of side wall cleaning assemblies is electrically connected to the wire harness inside the plurality of wire harness frames through the wire harness.

[0006] Preferably, the side wall cleaning assembly comprises a side suction motor, a side suction pump housing, a side suction spiral pump blade, a side suction bracket and a side brush bracket, a side motor groove is connected to the center of the inner wall of the spherical bulge, a side suction motor is arranged inside the side motor groove, and the side suction motor is electrically connected to the wire harness inside the wire harness frame through the wire harness.

[0007] Preferably, the side suction motor is connected with a side suction pump shell through a motor shaft away from one end of the wire harness frame, a side suction spiral pump blade is connected with the inner wall of the side suction pump shell near the wire harness frame, two side suction frames and two side brush frames are connected with the side suction pump shell near one end of the wire harness frame, and the two side suction frames and the two side brush frames are distributed in a ten-finger cross manner.

[0008] Preferably, the two side suction frames are in communication with the side suction pump shell and leave a gap between the inner wall of the spherical bulge, the two side brush frames are connected with cleaning brushes near one end of the inner wall of the spherical bulge, and the inner wall of the spherical bulge is attached to the cleaning brushes, and a limiting ring is connected with the inner wall of the wire harness frame away from one end of the side suction pump shell.

[0009] Preferably, the limiting ring is located away from one end of the wire harness frame, a side surface filter element is arranged at one end of the wire harness frame away from the side suction spiral pump blade, and the side surface filter element is located inside the side suction pump shell, a side surface limiting sleeve is threadedly connected with the outside of one end of the side suction pump shell away from the wire harness frame, and the side surface limiting sleeve is located at one end of the side surface filter element away from the side suction spiral pump blade.

[0010] Preferably, the bottom cleaning assembly comprises a bottom suction pump shell, a bottom suction motor, a connecting shaft, a bottom sealing turntable, a bottom suction frame and a bottom brush frame, a limiting support is connected with the inner wall of the bottom end of the box body, the bottom suction pump shell is connected with the center of the limiting support, and the bottom suction pump shell is located directly above the water collecting tank, a filter groove is formed in the outer side of the upper end of the bottom suction pump shell, and the filter groove is in communication with the inside of the bottom suction pump shell.

[0011] Preferably, a bottom motor groove is formed in the center of the upper end of the bottom suction pump shell, the bottom suction motor is arranged in the bottom motor groove, and the bottom suction motor is electrically connected with an external control switch and a power supply through a wire harness, a bottom filter element is arranged in the filter groove, a bottom limiting sleeve is threadedly connected with the outside of the upper end of the bottom suction pump shell, and the bottom limiting sleeve is located at the upper end of the bottom filter element, and the bottom suction motor is rotatably connected with the connecting shaft at the center of the lower end of the bottom suction motor.

[0012] Preferably, the bottom sealing turntable is rotatably connected with the inside of the lower end of the bottom suction pump shell and attached to the inner wall of the bottom suction pump shell, and the bottom sealing turntable is connected with two bottom suction frames and two bottom brush frames on the outer side of the lower end, and the two bottom suction frames and the two bottom brush frames are distributed in a cross manner and rotatably connected with the inside of the water collecting tank.

[0013] Preferably, the two bottom suction frames are in communication with the inside of the bottom suction pump shell and leave a gap between the inner wall of the water collecting tank, the two bottom brush frames are connected with cleaning brushes at the lower end, and the inner wall of the water collecting tank is attached to the cleaning brushes, and a bottom suction spiral pump blade is connected with the outside of the connecting shaft and rotatably connected with the inside of the bottom suction pump shell and located on the upper side of the bottom sealing turntable.

[0014] A secondary water supply large water tank self-cleaning method, steps as follows: Step one: water injection and water supply, water is injected into the box body through the upper cover and the water inlet pipe, and water is supplied to the outside through the water collecting tank and the water supply pipe; Step two: self-cleaning, power is supplied to the plurality of side suction motors and the bottom suction motor through the external power supply, and the operation of the plurality of side suction motors and the bottom suction motor is controlled through the control switch, so that the box body is cleaned by the side wall cleaning assembly to clean and filter the inner wall of the plurality of spherical bulges on the side wall and the bottom cleaning assembly to clean and filter the inner wall of the bottom and the water collecting tank; Step three: regular maintenance, after the secondary water supply tank runs for a certain period of time, the upper cover is opened, and the plurality of side filters and the bottom filter are replaced manually to ensure the stable operation of the side wall cleaning assembly and the bottom cleaning assembly.

[0015] Compared with the prior art, the present application provides a secondary water supply large water tank self-cleaning device and self-cleaning method, which has the following beneficial effects: 1、The present application sets multiple spherical bulges on the side wall of the box body, and integrates a side wall cleaning assembly driven by a side suction motor inside, including a side suction pump shell, a spiral pump blade, a cross-distributed side suction frame and a side brush frame. Through the rotation driven by the motor, the cleaning brush on the side brush frame directly scrapes the inner wall of the spherical bulge, and at the same time, the spiral pump blade sucks the separated silt and filters it through the side filter, realizing the dual functions of sediment removal and water quality filtration.

[0016] 2、The present application sets a bottom cleaning assembly in the water collecting tank, which is driven by a bottom suction motor to connect a rotating shaft to drive a bottom sealing turntable to rotate, so that the cross-distributed bottom suction frame and bottom brush frame move synchronously. The bottom brush frame cleans the inner wall of the water collecting tank, and the bottom suction spiral pump blade sucks the mud water to the bottom filter through negative pressure, effectively solving the problem of silt accumulation at the bottom of the box body, while the filtered water is reflowed to avoid secondary pollution.

[0017] 3、The side wall and bottom filter core of the present application are fixed by a threaded limiting sleeve, and when maintaining, only the limiting sleeve needs to be disassembled to replace the filter core, combined with the convenient opening and closing structure of the climbing ladder and the upper cover, which significantly reduces the difficulty of manual maintenance. The modular design of the side suction pump shell and the bottom suction pump shell allows independent maintenance, improving the maintenance efficiency.

[0018] 4、The spiral pump blade of the side wall cleaning assembly of the present application and the bottom suction pump shell form a directional water flow, which forces the circulation of the water body in the box during the cleaning process, avoiding the formation of static areas. The protruding structure of the spherical bulge cooperates with the rotating brush frame to generate turbulence, further inhibiting the deposition of particulate matter, and keeping the water clean for a long time. DETAILED DESCRIPTION

[0019] Figure 1 It is a three-dimensional structure schematic diagram of the secondary water supply tank of the present application.

[0020] Figure 2 It is a perspective sectional structure schematic diagram of the secondary water supply tank of the present application.

[0021] Figure 3 It is a front view sectional structure schematic diagram of the secondary water supply tank of the present application.

[0022] Figure 4 It is a perspective structure schematic diagram of the side wall cleaning assembly of the present application. Figure 3 It is an enlarged schematic diagram of the middle A.

[0023] Figure 5 It is a perspective sectional structure schematic diagram of the bottom cleaning assembly of the present application.

[0024] Figure 6 It is a perspective structure schematic diagram of the bottom cleaning assembly of the present application.

[0025] Figure 7 It is a perspective sectional structure schematic diagram of the bottom cleaning assembly of the present application.

[0026] Figure 8 It is a schematic diagram of the bottom suction pump shell connecting structure of the present application.

[0027] Figure 9 It is a schematic diagram of the connecting shaft connecting structure of the present application.

[0028] In the figure: 1, water tank frame; 2, tank body; 3, upper cover; 4, water inlet pipe; 5, spherical bulge; 6, water collecting groove; 7, water supply pipe; 8, supporting leg; 9, climbing ladder; 10, wire harness frame; 11, side motor groove; 12, side suction motor; 13, side suction pump shell; 14, side suction spiral pump blade; 15, side suction frame; 16, side brush frame; 17, limiting ring; 18, side filter element; 19, side limiting sleeve; 20, limiting support; 21, bottom suction pump shell; 22, filtering groove; 23, bottom motor groove; 24, bottom suction motor; 25, bottom filter element; 26, bottom limiting sleeve; 27, connecting shaft; 28, bottom sealing turntable; 29, bottom suction frame; 30, bottom brush frame; 31, bottom suction spiral pump blade. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0030] The present application provides a secondary water supply tank as Figures 1-9The illustrated secondary water supply large water tank self-cleaning device, including water tank frame 1, water tank frame 1 inside setting has box 2, and box 2 upper end center place setting has upper opening, upper opening upper end outside screw thread connection has upper cover 3, upper cover 3 upper end center place connection has water inlet pipe 4, box 2 side wall on setting has multiple spherical bulges 5, multiple spherical bulges 5 inside all setting has side wall cleaning assembly, box 2 lower end communication has water collecting tank 6, water collecting tank 6 inside setting has bottom cleaning assembly, water collecting tank 6 lower end center place connection has water supply pipe 7, water tank frame 1 lower end four corners all connection has support leg 8, water tank frame 1 front end connection has climbing ladder 9, water tank frame 1 outside connection has multiple wire harness frame 10, and multiple wire harness frame 10 inside all setting has wire harness, and through wire harness and external control switch and power supply electric connection, multiple side wall cleaning assembly all through wire harness and multiple wire harness frame 10 inside wire harness electric connection, in the process of self-cleaning to the secondary water supply tank inside, box 2 is installed in the high place of building through water tank frame 1, and water tank frame 1 lower end is supported through multiple support legs 8, and through climbing ladder 9 enters the upper opening of box 2, maintains the side wall cleaning assembly and bottom cleaning assembly inside box 2, water inlet pipe 4 is injected into the inside of box 2 through upper cover 3, stores water in the inside of box 2, and supplies water to the outside through water collecting tank 6 and water supply pipe 7, since box 2 is installed in the high place of building, therefore water supply pipe 7 can pressurize the water supplied through the position of box 2, ensure water pressure.

[0031] Wherein, in the process of box 2 operation, box 2 can be self-cleaning through the inside setting multiple side wall cleaning assembly and bottom cleaning assembly, ensure the inside cleaning of box 2, and ensure the cleaning of the water stored in the inside of box 2, improve water safety.

[0032] As Figures 2-5As shown, the side wall cleaning assembly includes a side suction motor 12, a side suction pump shell 13, a side suction spiral pump blade 14, a side suction bracket 15 and a side brush bracket 16, the inner wall center of the spherical bulge 5 is connected with a side motor groove 11, the side motor groove 11 is internally provided with the side suction motor 12, and the side suction motor 12 is electrically connected with the wire harness inside the wire harness bracket 10 through the wire harness, the side suction motor 12 is connected with the side suction pump shell 13 through the motor shaft away from one end of the wire harness bracket 10, the side suction pump shell 13 is connected with two side suction brackets 15 and two side brush brackets 16 on the side close to the wire harness bracket 10, and the two side suction brackets 15 and the two side brush brackets 16 are distributed in a cross shape, the two side suction brackets 15 are communicated with the side suction pump shell 13, and a gap is left between the two side suction brackets 15 and the inner wall of the spherical bulge 5, the two side brush brackets 16 are connected with cleaning brushes on the side close to the inner wall of the spherical bulge 5, and the cleaning brushes are attached to the inner wall of the spherical bulge 5, in the process of cleaning the side wall of the box body 2 and the inside of the spherical bulge 5, the inside of the plurality of spherical bulges 5 arranged on the side wall of the box body 2 is most prone to depositing silt, the inside of the plurality of spherical bulges 5 needs to be cleaned, since the side wall cleaning assembly is electrically connected with the wire harness inside the wire harness bracket 10 through the wire harness, and is electrically connected with the external control switch and the power supply through the wire harness inside the wire harness bracket 10, the plurality of side suction motors 12 can be started to operate through the external control switch, and is powered through the external power supply, the plurality of side suction motors 12 drives the side suction pump shell 13 to rotate through the motor shaft, and drives the side suction spiral pump blade 14, the side suction bracket 15 and the side brush bracket 16 to rotate together through the side suction pump shell 13, at this time, the two side suction brackets 15 and the two side brush brackets 16 arranged in a cross shape rotate inside the spherical bulge 5, the side brush bracket 16 can clean the inner wall of the spherical bulge 5 through the cleaning brush, so as to avoid the silt from depositing inside the spherical bulge 5, thereby cleaning the side wall of the box body 2.

[0033] At the same time, the side suction pump shell 13 is connected with the side suction spiral pump blade 14 on the side close to the inner wall of the wire harness bracket 10, the side suction pump shell 13 is connected with a limiting ring 17 on the side away from the inner wall of the wire harness bracket 10, the limiting ring 17 is located on the side away from the wire harness bracket 10 of the side suction spiral pump blade 14, the wire harness bracket 10 is provided with a side filter element 18 on the side away from the side suction spiral pump blade 14, and the side filter element 18 is located inside the side suction pump shell 13, the side suction pump shell 13 is externally screwed with a side limiting sleeve 19 on the side away from the wire harness bracket 10, and the side limiting sleeve 19 is located on the side away from the side suction spiral pump blade 14 of the side filter element 18, since the side suction pump shell 13 and the side suction spiral pump blade 14 can constitute a side wall water suction pump, when the side suction spiral pump blade 14 rotates, the side suction spiral pump blade 14 can suck the water inside the spherical bulge 5 through the side suction bracket 15, thereby sucking the mud and water cleaned by the side brush bracket 16 into the side suction pump shell 13, and discharging the mud and water from the other end of the side suction pump shell 13, and in the process of discharging, the mud and water can be filtered through the side filter element 18, which can clean the silt on the inner wall of the spherical bulge 5 and filter the water inside the box body 2, thereby improving the cleanliness of the water and improving the safety of the water.

[0034] In addition, in the process of replacing the side filter 18, the water in the tank 2 is discharged, and enters the tank 2 through the climbing ladder 9 and the upper opening of the tank 2, the side limiting sleeve 19 is unscrewed, the side filter 18 is taken out, the new side filter 18 is clamped between the limiting ring 17 and the side limiting sleeve 19, and the side filter 18 is installed firmly.

[0035] As shown in Figures 6-9 The bottom cleaning assembly includes a bottom suction pump shell 21, a bottom suction motor 24, a connecting shaft 27, a bottom sealing turntable 28, a bottom suction bracket 29, and a bottom brush bracket 30. The tank 2 is connected to a limiting support 20 on the inner wall of the lower end, and the limiting support 20 is connected to the bottom suction pump shell 21 at the center, and the bottom suction pump shell 21 is located directly above the water collecting tank 6. A bottom motor groove 23 is formed at the upper end center of the bottom suction pump shell 21, and a bottom suction motor 24 is arranged inside the bottom motor groove 23. The bottom suction motor 24 is electrically connected to the external control switch and power supply through a wire harness. The bottom suction motor 24 is rotatably connected to the connecting shaft 27 at the lower end center, and the connecting shaft 27 is connected to the bottom sealing turntable 28 at the lower end. The bottom sealing turntable 28 is rotatably connected to the inside of the bottom suction pump shell 21 at the lower end, and is in close contact with the inner wall of the bottom suction pump shell 21. The bottom sealing turntable 28 is connected to two bottom suction brackets 29 and two bottom brush brackets 30 on the outer side of the lower end, and the two bottom suction brackets 29 and the two bottom brush brackets 30 are cross-distributed and rotatably connected inside the water collecting tank 6. The two bottom suction brackets 29 are in communication with the inside of the bottom suction pump shell 21, and a gap is left between the two bottom suction brackets 29 and the inner wall of the water collecting tank 6. The two bottom brush brackets 30 are connected to cleaning brushes at the lower end, and are in close contact with the inner wall of the water collecting tank 6 through the cleaning brushes. During cleaning of the bottom of the tank 2 and the inside of the water collecting tank 6, the most sediment is deposited on the bottom of the tank 2, and most of the sediment is deposited inside the water collecting tank 6. The bottom suction motor 24 is controlled to operate by the external control switch and is powered by the external power supply. The bottom suction motor 24 drives the bottom sealing turntable 28 to rotate through the connecting shaft 27, and drives the two bottom suction brackets 29 and the two bottom brush brackets 30 to rotate inside the water collecting tank 6 through the bottom sealing turntable 28. At this time, the bottom brush bracket 30 can clean the inner wall of the water collecting tank 6 through the cleaning brush, so as to avoid sediment deposition inside the water collecting tank 6, thereby cleaning the bottom of the tank 2.

[0036] The bottom filter core 25 is arranged in the filter groove 22, and the bottom limiting sleeve 26 is screwed on the outer side of the upper end of the bottom suction pump shell 21. The bottom suction spiral pump blade 31 is connected to the outer side of the connecting shaft 27, and the bottom suction spiral pump blade 31 is rotatably connected to the inner side of the bottom suction pump shell 21 and located above the bottom sealing turntable 28. Since the bottom suction pump shell 21, the bottom sealing turntable 28 and the bottom suction spiral pump blade 31 can form a bottom suction pump, when the bottom suction spiral pump blade 31 rotates in the bottom suction pump shell 21, the bottom suction spiral pump blade 31 can suck the water in the water collecting groove 6 through the bottom suction frame 29, so that the mud water cleaned by the bottom brush frame 30 is sucked into the bottom suction pump shell 21 and discharged from the upper end of the bottom suction pump shell 21, and then introduced into the filter groove 22. In the process of discharging, the mud water can be filtered by the bottom filter core 25, which can clean the silt on the inner wall of the water collecting groove 6 and filter the water in the box body 2, thereby improving the cleanliness of the water and improving the safety of the water. In addition, during the replacement of the bottom filter core 25, the bottom limiting sleeve 26 is unscrewed, the bottom filter core 25 is taken out for replacement, the new bottom filter core 25 is installed in the filter groove 22 and fixed by the bottom limiting sleeve 26, so that the bottom filter core 25 is firmly installed.

[0037] Finally, it should be noted that: the above only for the preferred embodiments of the present application, and not for limiting the present application, although the foregoing detailed description of the present application is made with reference to the foregoing embodiments, for those skilled in the art, it still can modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for some technical features, any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application, should be included in the protection scope of the present application.

Claims

1. A self-cleaning device for a large secondary water supply tank, characterized in that: The invention comprises a water tank frame (1), wherein a box body (2) is provided inside the water tank frame (1), and an upper opening is provided at the center of the upper end of the box body (2), an upper cover (3) is connected to the upper end of the upper opening through a threaded connection, and a water inlet pipe (4) is connected to the center of the upper end of the upper cover (3), a plurality of spherical bulges (5) are provided on the side wall of the box body (2), and a side wall cleaning component is provided inside each of the plurality of spherical bulges (5), and a water collecting tank (6) is connected to the lower end of the box body (2), and a bottom is provided inside the water collecting tank (6). A cleaning assembly, wherein the center of the lower end of the water collecting tank (6) is connected to a water supply pipe (7), the four corners of the lower end of the water tank frame (1) are connected to support legs (8), the front end of the water tank frame (1) is connected to a climbing ladder (9), the outside of the water tank frame (1) is connected to a plurality of wiring harness racks (10), and the inside of the plurality of wiring harness racks (10) are provided with wiring harnesses, and are electrically connected to an external control switch and a power supply through the wiring harnesses, and the plurality of side wall cleaning assemblies are electrically connected to the wiring harnesses inside the plurality of wiring harness racks (10) through the wiring harnesses.

2. A self-cleaning device for a large secondary water supply tank as claimed in claim 1, characterized in that: The side wall cleaning assembly comprises a side suction motor (12), a side suction pump housing (13), a side suction spiral pump blade (14), a side suction frame (15) and a side brush frame (16); a side motor slot (11) is connected to the center of the inner wall of the spherical bulge (5); a side suction motor (12) is arranged inside the side motor slot (11), and the side suction motor (12) is electrically connected to a wiring harness inside the wiring harness frame (10) through a wiring harness.

3. A self-cleaning device for a large secondary water supply tank as claimed in claim 2, characterized in that: The side suction motor (12) is connected to a side suction pump housing (13) via a motor shaft at one end away from the harness frame (10); a side suction spiral pump blade (14) is connected to an inner wall of the side suction pump housing (13) close to the harness frame (10); and two side suction frames (15) and two side brush frames (16) are connected to one end of the side suction pump housing (13) close to the harness frame (10), and the two side suction frames (15) and the two side brush frames (16) are distributed in a cross-shaped manner.

4. A self-cleaning device for a large secondary water supply tank as claimed in claim 3, characterized in that: The two side suction racks (15) are both connected to the side suction pump housing (13) and leave a gap between them and the inner wall of the spherical bulge (5). The two side brush racks (16) are connected to cleaning brushes at one end close to the inner wall of the spherical bulge (5) and fit with the inner wall of the spherical bulge (5) through the cleaning brushes. A limiting ring (17) is connected to the inner wall of the side suction pump housing (13) away from the harness frame (10).

5. A self-cleaning device for a large secondary water supply tank as claimed in claim 4, characterized in that: The limiting ring (17) is located on the side of the side suction spiral pump blade (14) away from the harness frame (10), and a side filter element (18) is provided at one end of the harness frame (10) away from the side suction spiral pump blade (14), and the side filter element (18) is located inside the side suction pump housing (13), and the side limiting sleeve (19) is externally threadedly connected to the end of the side suction pump housing (13) away from the harness frame (10), and the side limiting sleeve (19) is located at the end of the side filter element (18) away from the side suction spiral pump blade (14).

6. A self-cleaning device for a large secondary water supply tank as claimed in claim 1, characterized in that: The bottom cleaning assembly comprises a bottom suction pump housing (21), a bottom suction motor (24), a connecting shaft (27), a bottom sealing rotary disc (28), a bottom suction frame (29) and a bottom brush frame (30); a limiting bracket (20) is connected to the inner wall of the lower end of the box body (2); the center of the limiting bracket (20) is connected to the bottom suction pump housing (21), and the bottom suction pump housing (21) is located directly above the water collecting tank (6); a filter tank (22) is provided inside the outer side of the upper end of the bottom suction pump housing (21), and the filter tank (22) is communicated with the interior of the bottom suction pump housing (21).

7. A self-cleaning device for a large secondary water supply tank as claimed in claim 6, characterized in that: A bottom motor slot (23) is provided at the center of the upper end of the bottom suction pump housing (21), a bottom suction motor (24) is provided inside the bottom motor slot (23), and the bottom suction motor (24) is electrically connected to an external control switch and a power supply through a wiring harness, a bottom filter element (25) is provided inside the filter tank (22), a bottom limit sleeve (26) is externally threadedly connected to the upper end of the bottom suction pump housing (21), and the bottom limit sleeve (26) is located at the upper end of the bottom filter element (25), and a connecting shaft (27) is rotatably connected to the center of the lower end of the bottom suction motor (24).

8. A self-cleaning device for a large secondary water supply tank as claimed in claim 7, characterized in that: The lower end of the connecting shaft (27) is connected to a bottom sealing rotary disc (28), and the bottom sealing rotary disc (28) is rotatably connected to the interior of the lower end of the bottom suction pump housing (21) and is in contact with the inner wall of the bottom suction pump housing (21). The outer side of the lower end of the bottom sealing rotary disc (28) is connected to two bottom suction racks (29) and two bottom brush racks (30), and the two bottom suction racks (29) and the two bottom brush racks (30) are distributed in a cross shape and are rotatably connected to the interior of the water collecting tank (6).

9. A self-cleaning device for a large secondary water supply tank as claimed in claim 8, characterized in that: The two bottom suction racks (29) are both connected to the interior of the bottom suction pump housing (21) and have a gap between them and the inner wall of the water collecting tank (6). The lower ends of the two bottom brush racks (30) are both connected to cleaning brushes and fit with the inner wall of the water collecting tank (6) through the cleaning brushes. The outside of the connecting shaft (27) is connected to the bottom suction spiral pump blade (31), and the bottom suction spiral pump blade (31) is rotatably connected to the inside of the bottom suction pump housing (21) and is located on the upper side of the bottom seal turntable (28).

10. A self-cleaning method for a large secondary water supply tank according to any one of claims 1 to 9, characterized in that: Here are the steps: Step 1: Filling and supplying water, filling water into the box body (2) through the upper cover (3) and the water inlet pipe (4), and supplying water to the outside through the water collecting tank (6) and the water supply pipe (7); Step 2: Self-cleaning, powering the plurality of side suction motors (12) and the bottom suction motor (24) through an external power supply, and controlling the operation of the plurality of side suction motors (12) and the bottom suction motor (24) through a control switch, so that the box body (2) cleans and filters the side walls and the inner walls of the plurality of spherical bulges (5) through the side wall cleaning component, and cleans and filters the bottom and the inner wall of the water collection tank (6) through the bottom cleaning component; Step 3: Regular maintenance: After the secondary water supply tank has been running for a certain period of time, the upper cover (3) is opened, and the inside of the tank (2) is manually entered to replace the multiple side filter elements (18) and the bottom filter element (25) to ensure the stable operation of the side wall cleaning assembly and the bottom cleaning assembly.

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