Municipal sewage treatment plant

Abstract

The application relates to the field of sewage treatment technology, in particular to a municipal sewage treatment device which comprises a sewage treatment box, a temporary storage cylinder is arranged in the sewage treatment box, the bottom of the temporary storage cylinder is arranged in an inverted conical mode, flow guide holes are arranged in the bottom of the temporary storage cylinder, a hollow floating ball is arranged in the temporary storage cylinder, the floating ball covers the flow guide holes and is tightly attached to the side wall of the temporary storage cylinder, a plurality of balloons are arranged in the floating ball, the floating ball is suspended in the temporary storage cylinder in a natural state, a control member for controlling the up-down movement of the floating ball is arranged on the floating ball, and a feeding pipe is connected to the opening of the temporary storage cylinder. The application has the effect of relieving the problem that newly-entered sewage causes secondary pollution to purified water.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of sewage treatment technology, in particular to a municipal sewage treatment device. BACKGROUND

[0002] Sewage treatment refers to the process of purifying sewage to meet the water quality requirements for discharge into a water body or for reuse. A large amount of sewage is generated in daily municipal work and needs to be treated. Generally, sewage treatment is carried out by adding sewage treatment agents in a sewage tank to carry out chemical reactions to purify harmful substances in the sewage to meet the sewage discharge standard.

[0003] In the related art, referring to Figure 1 , including a treatment box 46, the top of the treatment box 46 is provided with a water inlet 47, and the treatment box 46 is further provided with a feeding port 48, and the bottom of the treatment box 46 is provided with a recovery port 49. The sewage is treated by adding coagulant, treatment agent and other drugs in the treatment box 46, and the treated water is discharged to the sewer.

[0004] For the above-mentioned related art, the inventor believes that the water inlet of the water tank is generally kept open, and new sewage will enter the water tank when the sewage in the water tank is being treated, which will cause secondary pollution to the purified water. SUMMARY

[0005] In order to alleviate the problem of secondary pollution of new sewage to purified water, the present application provides a municipal sewage treatment device.

[0006] The municipal sewage treatment device provided by the present application adopts the following technical scheme:

[0007] A municipal sewage treatment device, comprising a sewage treatment box, wherein the sewage treatment box is provided with a temporary storage cylinder, the bottom of the temporary storage cylinder is in an inverted conical shape, and the bottom of the temporary storage cylinder is provided with a flow guide hole, the temporary storage cylinder is provided with a hollow floating ball, the floating ball covers the flow guide hole and is tightly attached to the side wall of the temporary storage cylinder, the floating ball is provided with a plurality of balloons, in a natural state, the floating ball is suspended in the temporary storage cylinder, the floating ball is provided with a control member for controlling the up and down movement of the floating ball, and the opening of the temporary storage cylinder is communicated with a feeding pipe.

[0008] By adopting the technical scheme, when in use, sewage is discharged into the sewage treatment tank through the feeding pipe, and after entering the temporary storage cylinder, the sewage falls into the space between the sewage treatment tank and the temporary storage cylinder. Then, the operator moves the floating ball downward by the control member, so that the floating ball blocks the flow guide hole at the bottom of the temporary storage cylinder. At the same time, the operator adds flocculating agent into the sewage treatment tank, and meanwhile, the feeding pipe is still continuously fed with sewage. At this time, the sewage is temporarily stored in the temporary storage cylinder, so that the water in the sewage treatment tank keeps a stable state without new sewage mixed in for a period of time, which is beneficial to flocculation of the sewage in the sewage treatment tank and avoids secondary pollution.

[0009] Optionally, the control member comprises a reversing ring, a floating ball, a pull rope and a jacking post. The reversing ring is connected to the bottom wall of the sewage treatment tank. One end of the pull rope is connected to the floating ball, and the other end of the pull rope passes through the reversing ring and is connected to the floating ball. An electromagnet I is arranged below the temporary storage cylinder. The jacking post is slidingly arranged above the electromagnet I. A magnetic force member that is magnetically repulsive to the electromagnet I is arranged at the bottom of the jacking post. The jacking post supports the floating ball, and a gap is formed between the floating ball and the bottom wall of the temporary storage cylinder.

[0010] By adopting the technical scheme, the water level in the sewage treatment tank is continuously raised, so that the floating ball is continuously moved upward under the action of the buoyancy. Under the action of the reversing ring, the floating ball drives the pull rope to move. The pull rope pulls the floating ball downward and gradually abuts against the bottom wall of the temporary storage cylinder to completely block the flow guide hole. When it is needed to move the floating ball upward, the electromagnet I is powered on. The repulsive force generated by the electromagnet I and the magnetic force member makes the jacking post instantaneously move upward to push the floating ball upward, so that the sewage above the floating ball flows out of the temporary storage cylinder.

[0011] Optionally, a vertical guide pipe is arranged in the sewage treatment tank. The floating ball is slidingly arranged in the guide pipe. An electric control switch I is arranged on the bottom wall of the guide pipe. The electric control switch I is electrically connected to the electromagnet I through a control system.

[0012] By adopting the technical scheme, as the water that has been flocculated is continuously discharged, the water level in the sewage treatment tank is continuously lowered. The floating ball moves downward under the action of gravity until the bottom of the guide pipe contacts the electric control switch I. The electric control switch I powers on the electromagnet I through the control system to lift the jacking post upward.

[0013] Optionally, the control piece comprises a bowl-shaped water receiving container, an elastic piece, a positioning rope and a top support pipe, the water receiving container comprises a bottom plate and a plurality of surrounding plates, the plurality of surrounding plates are connected to the bottom plate through torsion springs, and the plurality of surrounding plates are surrounded by the bottom plate to form the water receiving container; one end of the elastic piece is connected to the bottom wall of the bottom plate, and the other end is connected to the bottom wall of the sewage treatment box; the top support pipe is vertically arranged in the water receiving container; one end of the positioning rope is connected to the floating ball, and the other end penetrates through the top support pipe and is connected to the bottom plate; the bottom wall of the sewage treatment box is connected with a plurality of electromagnets II corresponding to the plurality of surrounding plates; a magnet piece is embedded on the side wall of the surrounding plate; and a plurality of magnet pieces are arranged one by one corresponding to the plurality of electromagnets II. When the electromagnets II are powered on, the attractive force generated between the electromagnets II and the magnet pieces is greater than the elastic force of the torsion springs, and the surrounding plates are inclined to the bottom wall of the sewage treatment box.

[0014] By adopting the above technical scheme, the sewage flows out of the temporary storage cylinder through the flow guide hole, and then flows into the water receiving container, driving the positioning rope to move downward and gradually adhere to the bottom wall of the inverted cone cylinder. At this time, the electromagnets II are arranged opposite to the corresponding magnet pieces, and the floating ball completely blocks the flow guide hole.

[0015] Then, the operator adds a flocculating agent into the water receiving container through the feeding port, and at the same time, the feeding pipe is still continuously feeding sewage. At this time, the sewage is temporarily stored in the temporary storage cylinder, so that the water in the sewage treatment box maintains a stable state without new sewage mixing for a period of time, which is beneficial to the flocculation of the sewage in the sewage treatment box and does not cause secondary pollution.

[0016] After a period of time, the operator powers on the electromagnets II, the electromagnets II adsorb the magnet pieces on the surrounding plates, so that the plurality of surrounding plates rotate in the direction away from the vertical center line of the bottom plate, so that the clean water in the water receiving container is discharged into the sewage treatment box. As the amount of water in the water receiving container continuously decreases, the pressure of the water receiving container on the supporting spring decreases, the supporting spring drives the bottom plate to move upward rapidly under the action of the restoring elastic deformation force, and the top support pipe moves upward instantaneously, and the sewage temporarily stored in the temporary storage cylinder enters the water receiving container. At this time, the floating ball moves upward and resets for the next treatment.

[0017] Optionally, the floating ball comprises a first arc ball and a second arc ball, and the first arc ball and the second arc ball are threadedly connected.

[0018] By adopting the above technical scheme, the operator can conveniently disassemble the first arc ball and the second arc ball, and place the balloon inside.

[0019] Optionally, a plurality of speed increasing holes are formed in the side wall of the guide pipe, and the speed increasing holes are through holes.

[0020] By adopting the technical scheme, the water entering the guide pipe can be accelerated in speed by the accelerating hole, so that the floating ball can float up rapidly.

[0021] Optionally, the bottom plate is provided with a sediment hole, and a non-woven fabric layer is connected in the sediment hole and provided with a mounting hole for the top support pipe to penetrate.

[0022] By adopting the technical scheme, the non-woven fabric can be used to collect the dirt after flocculation, so as to clean the dirt.

[0023] Optionally, the supporting spring is coated with polytetrafluoroethylene.

[0024] By adopting the technical scheme, the supporting spring is protected, and the possibility of corrosion of the supporting spring is reduced.

[0025] In summary, the present application has at least one of the following beneficial technical effects:

[0026] 1. The present application is provided with a sewage treatment tank, a temporary storage cylinder, a floating ball, a gas ball and a control member. The floating ball is moved downward by the control member, so that the floating ball blocks the flow guide hole at the bottom of the temporary storage cylinder. The operator adds flocculating agent into the sewage treatment tank, and at the same time, the feeding pipe is still continuously feeding sewage. At this time, the sewage is temporarily stored in the temporary storage cylinder, so that the water in the sewage treatment tank maintains a stable state without new sewage mixing for a period of time, which is beneficial to the flocculation of the sewage in the sewage treatment tank and does not cause secondary pollution.

[0027] 2. The present application is provided with a reversing ring, a buoyancy ball, a pull rope and a top column. The water level in the sewage treatment tank continuously rises, so that the buoyancy ball is continuously moved upward under the action of the buoyancy. Under the action of the reversing ring, the buoyancy ball drives the pull rope to move. The pull rope pulls the floating ball downward and gradually adheres to the bottom wall of the temporary storage cylinder to completely block the flow guide hole. When it is needed to move the floating ball upward, the electromagnet is powered on. The repulsive force generated by the electromagnet and the magnetic force member makes the top column instantaneously move upward to top the floating ball, so that the sewage above the floating ball flows out of the temporary storage cylinder. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 is a structural schematic view of related technology in the background art.

[0029] Figure 2 is a structural schematic view in embodiment 1 of the present application.

[0030] Figure 3 is a sectional view of the internal structure of the sewage treatment tank in embodiment 1 of the present application.

[0031] Figure 4 is an enlarged view of part A in Figure 3 .

[0032] Figure 5 is a sectional view of the internal structure of the sewage treatment tank in Embodiment 2 of the present application.

[0033] Figure 6 is a schematic view of the water receiving container structure in Embodiment 2 of the present application.

[0034] Figure 7 is an enlarged view of Part B in Figure 6

[0035] BRIEF DESCRIPTION OF DRAWINGS 1, sewage treatment tank; 2, sewage discharge pipe; 3, sewage discharge valve; 4, support plate; 5, temporary storage cylinder; 6, blocking cover; 7, feed pipe; 8, cylindrical cylinder; 9, inverted conical cylinder; 10, flow guide hole; 11, flow guide hole; 12, floating ball; 13, first arc ball; 14, second arc ball; 15, rubber tube; 16, air vent; 17, connecting ring; 18, balloon; 19, reversing ring; 20, buoyancy ball; 21, pull rope; 22, top column; 23, guide pipe; 24, speed-up hole; 25, electric control switch one; 26, first plate; 27, electromagnet one; 28, guide ring; 29, magnetic component; 30, control switch two; 31, drain pipe; 32, electric control valve; 33, water receiving container; 34, elastic component; 35, positioning rope; 36, bracing pipe; 37, bottom plate; 38, enclosing plate; 39, torsional spring; 40, electromagnet two; 41, magnet piece; 42, sedimentation hole; 43, counterweight ring; 44, non-woven fabric layer; 45, mounting hole; 46, treatment tank; 47, water inlet; 48, feeding port; 49, recovery port; 50, feeding port. DETAILED DESCRIPTION

[0036] The following will be described in detail below with reference to the accompanying drawings. Figures 1-7 A further detailed description of the present application is provided.

[0037] Referring to Figure 2 , Figure 3 and Figure 4 , a municipal sewage treatment device includes a sewage treatment tank 1, the bottom of the sewage treatment tank is in the shape of a circular truncated cone, one end has a large diameter and the other end has a small diameter, the end with the small diameter is provided with a sewage discharge pipe 2, and is arranged to face downward, the sewage discharge pipe 2 is provided with a sewage discharge valve 3, a temporary storage cylinder 5 is connected in the sewage treatment tank 1 through a plurality of support plates 4, the temporary storage cylinder 5 is open at the top and is provided with a blocking cover 6 to block the opening, the top of the temporary storage cylinder 5 is communicated with a feed pipe 7, one end of the feed pipe 7 penetrates through the blocking cover 6. The temporary storage cylinder 5 includes a cylindrical cylinder 8 and an inverted conical cylinder 9, the cylindrical cylinder 8 and the inverted conical cylinder 9 are integrally formed, the inverted conical cylinder 9 is arranged at the bottom of the cylindrical cylinder 8, the top end of the inverted conical cylinder 9 is provided with a flow guide hole 11, the bottom end of the inverted conical cylinder 9 is provided with a flow guide hole 10, the diameter of the flow guide hole 10 is smaller than that of the flow guide hole 11.

[0038] Referring to Figure 2 ,​Figure 3 and Figure 4 The hollow float ball 12 is provided in the temporary storage cylinder 5, and includes a first arc ball 13 and a second arc ball 14. The opening end of the first arc ball 13 is connected with a rubber pipe 15, a plurality of exhaust holes 16 are formed in the sidewall of the rubber pipe 15, the end of the rubber pipe 15 away from the first arc ball 13 is connected with a connecting ring 17, and the connecting ring 17 is threadedly connected with the second arc ball 14. The volume of the second arc ball 14 is much smaller than that of the first arc ball 13, so as to reduce the sewage stored in the second arc ball 14 and increase the mass of the second arc ball 14. A plurality of gas balls 18 are filled in the float ball 12, and hydrogen gas balls 18 can be used. The float ball 12 is provided with a control member for controlling the up-and-down movement of the float ball 12. In a natural state, the float ball 12 is suspended in the temporary storage cylinder 5.

[0039] Referring to Figure 2 , Figure 3 and Figure 4 , the control assembly includes a reversing ring 19, a buoyancy ball 20, a pull rope 21 and a top column 22. The reversing ring 19 is fixedly connected to the bottom wall of the sewage treatment tank 1. One end of the pull rope 21 is connected to the bottom of the float ball 12, and the other end is fixedly connected to the buoyancy ball 20 through the reversing ring 19. The float ball 12 blocks the flow guide hole 10 and tightly abuts against the sidewall of the inverted cone cylinder 9.

[0040] Referring to Figure 2 , Figure 3 and Figure 4 , in order to ensure that the buoyancy ball 20 can move in the vertical direction without affecting the normal pulling of the pull rope 21, a guide pipe 23 is vertically arranged in the sewage treatment tank 1. A plurality of speed increasing holes 24 are formed in the sidewall of the guide pipe 23. The speed increasing holes 24 are through holes. The buoyancy ball 20 is slidingly arranged in the guide pipe 23. An electric control switch one 25 is arranged on the bottom wall of the guide pipe 23.

[0041] Referring to Figure 2 , Figure 3 and Figure 4 , a first plate 26 is connected to the sidewall of the sewage treatment tank 1. An electromagnet one 27 is arranged on the first plate 26. The electromagnet one 27 is located directly below the temporary storage cylinder 5. A guide ring 28 is connected to the bottom of the temporary storage cylinder 5. The top column 22 is slidingly connected to the guide ring 28. A magnetic member 29 which is magnetically repulsive to the electrified electromagnet one 27 is embedded in the bottom of the top column 22. The magnetic member 29 can be a magnet block. The electric control switch one 25 is electrically connected to the electromagnet one 27 through a control system. When the electric control switch one 25 controls the electromagnet one 27 to be electrified through the control system, the top column 22 supports the float ball 12. There is a gap between the float ball 12 and the bottom wall of the inverted cone cylinder 9.

[0042] Referring to Figure 2 , Figure 3 and Figure 4The top of the cylindrical barrel 8 is provided with a control switch 30, the bottom wall of the sewage treatment tank 1 is provided with a drain pipe 31, the drain pipe 31 is provided with an electric control valve 32, the control switch 30 is electrically connected with the electric control valve 32 through a control system, the control switch 30 can adopt a pair of infrared photoelectric sensors, the emitting end and the receiving end of the pair of infrared photoelectric sensors are respectively located on the two sides of the cylindrical barrel 8, and the sewage discharged through the feed pipe 7 does not pass between the emitting end and the receiving end of the pair of infrared photoelectric sensors.

[0043] The implementation principle of the embodiment 1 is as follows: in use, an operator discharges sewage to be treated into the sewage treatment tank 1 through the feed pipe 7, the sewage flows out of the temporary storage barrel 5 through the flow guide hole 10, so that the water level in the sewage treatment tank 1 is continuously raised, and then the buoyancy ball 20 is continuously moved upward under the action of the buoyancy, the buoyancy ball 20 drives the pull rope 21 to move under the action of the reversing ring 19, the pull rope 21 pulls the floating ball 12 downward, and gradually adheres to the bottom wall of the inverted cone barrel 9, so as to completely block the flow guide hole 10, at this time, the buoyancy ball 20 does not contact the control switch one, therefore, the electromagnet one 27 is not powered on, the top column 22 contacts the electromagnet one 27 under the action of gravity and does not contact the floating ball 12;

[0044] Then, the operator adds a flocculating agent into the sewage treatment tank 1 through the feeding opening 50, at the same time, the feed pipe 7 still continuously enters sewage, at this time, the sewage is temporarily stored in the temporary storage barrel 5, therefore, the water in the sewage treatment tank 1 maintains a stable state without new sewage mixed in for a period of time, which is beneficial to the flocculation of the sewage in the sewage treatment tank 1 and does not cause secondary pollution;

[0045] After a period of time, the water level in the cylindrical barrel 8 is continuously raised, and then the first arc ball 13 is floated, so that the rubber tube 15 is gradually stretched until the first arc ball 13 moves to the control range of the control switch two 30, and the light emitted by the emitting end of the pair of infrared photoelectric sensors is blocked, at this time, the control switch two 30 opens the electric control valve 32 through the control system, and the clean water after flocculation is discharged, with the decrease of the water level in the sewage treatment tank 1, the buoyancy ball 20 is gradually moved downward until the control switch one 25 is touched, the control switch one 25 powers on the electromagnet one 27 through the control system, the repulsive force between the electromagnet one 27 and the magnet block makes the top column 22 quickly rise upward, and a gap is formed between the floating ball 12 and the bottom wall of the inverted cone barrel 9, at this time, the water above the floating ball 12 quickly flows to the lower side of the second arc ball 14, so that the sewage temporarily stored in the temporary storage barrel 5 enters the sewage treatment tank 1, the buoyancy of the first arc ball 13 disappears, the rubber tube 15 restores the deformation, the floating ball 12 moves upward, the buoyancy ball 20 moves downward, and the reset is performed for the next treatment.

[0046] Embodiment 2

[0047] The embodiment differs from embodiment 1 in that, referring to Figure 5 , Figure 6 and Figure 7 , the control member comprises a bowl-shaped water receiving container 33, an elastic member 34, a positioning rope 35 and a top support pipe 36, the water receiving container 33 comprises a bottom plate 37 and a plurality of enclosing plates 38, the plurality of enclosing plates 38 are rotationally connected to the circumferential sidewall of the bottom plate 37 through torsion springs 39, and the positioning rope 35 is an elastic rope.

[0048] Referring to Figure 5 , Figure 6 and Figure 7 , the plurality of enclosing plates 38 are enclosed with the bottom plate 37 to form the water receiving container 33, the elastic member 34 is a support spring coated with polytetrafluoroethylene on the outside, a plurality of elastic members 34 are provided, one end of the elastic member 34 is connected to the bottom wall of the bottom plate 37, the other end is connected to the bottom wall of the sewage treatment tank 1, the top support pipe 36 is vertically and fixedly connected to the bottom plate 37, one end of the positioning rope 35 is connected to the second arc ball 14, the other end penetrates through the top support pipe 36 and is connected to the bottom plate 37, and the bottom wall of the sewage treatment tank 1 is connected with a plurality of electromagnets 40 corresponding to the plurality of enclosing plates 38.

[0049] Referring to Figure 5 , Figure 6 and Figure 7 , a magnet piece 41 is embedded on the sidewall of the enclosing plate 38 away from the vertical center line of the bottom plate 37, and a plurality of magnet pieces 41 are provided corresponding to a plurality of electromagnets 40. When the electromagnet 40 is energized, the attractive force generated between the electromagnet 40 and the magnet piece 41 is greater than the elastic force of the torsion spring 39, so that the enclosing plate 38 is inclined towards the bottom wall of the sewage treatment tank 1.

[0050] Referring to Figure 5 , Figure 6 and Figure 7 , the bottom plate 37 is provided with a sediment hole 42, the sediment hole 42 is arranged in an arc shape, the top support pipe 36 is slidably sleeved with a counterweight ring 43, the sediment hole 42 is connected with a non-woven fabric layer 44 through a magic tape (not shown in the figure), the non-woven layer is provided with a mounting hole 45 for the top support pipe 36 to penetrate, and the mounting hole 45 is sleeved outside the counterweight ring 43 and connected with the mounting ring. The operator can repair the door (not shown in the figure) on the sidewall of the sewage treatment tank 1 according to the actual needs, so as to facilitate the operator to overhaul and disassemble the internal structure of the sewage treatment tank 1.

[0051] The implementation principle of embodiment 2 is that: in use, the operator discharges the sewage to be treated into the sewage treatment box 1 through the feeding pipe 7, the sewage flows out of the temporary storage cylinder 5 through the guide hole 10, and then flows into the water receiving container 33; as the water volume in the water receiving container 33 continuously increases, the pressure received by the supporting spring increases, and gradually moves downward, at the same time, the positioning rope 35 is driven to move downward and gradually abuts against the bottom wall of the inverted cone cylinder 9; at this time, the electromagnet two 40 is opposite to the corresponding magnet piece 41, and the second arc ball 14 completely blocks the guide hole 10;

[0052] Then, the operator adds the flocculating agent into the water receiving container 33 through the feeding port, at the same time, the feeding pipe 7 is still continuously fed into the sewage, at this time, the sewage is temporarily stored in the temporary storage cylinder 5, therefore, the water in the sewage treatment box 1 maintains a stable state without new sewage mixed in for a period of time, which is beneficial to the flocculation of the sewage in the sewage treatment box 1 and will not cause secondary pollution;

[0053] After a period of time, the operator energizes the electromagnet two 40, the electromagnet two 40 adsorbs the magnet piece 41 on the enclosing plate 38, so that the plurality of enclosing plates 38 rotates in the direction away from the vertical center line of the bottom plate 37, so that the clean water in the water receiving container 33 is discharged into the sewage treatment box 1; as the amount in the water receiving container 33 continuously decreases, the pressure of the water receiving container 33 on the supporting spring decreases, the supporting spring drives the bottom plate 37 to quickly move upward under the action of the restoring elastic deformation force, and at the same time, the magnet piece 41 is out of the action range of the electromagnet two 40 adsorbing the magnet piece 41, the plurality of enclosing plates 38 quickly resets, the top support pipe 36 quickly lifts up the floating ball 12 upward, a gap is generated between the floating ball 12 and the bottom wall of the inverted cone cylinder 9, at this time, the water above the floating ball 12 quickly flows to the lower side of the second arc ball 14, so that the sewage temporarily stored in the temporary storage cylinder 5 enters the water receiving container 33, at this time, the floating ball 12 moves upward and resets for next treatment;

[0054] As the dirt in the sedimentation hole 42 accumulates, the weight of the water receiving container 33 continuously increases, until the top of the top support pipe 36 is located below the temporary storage cylinder 5, and there is a gap between the top surface of the top support pipe 36 and the bottom end of the inverted cone cylinder 9, then the hook surface and the velvet surface of the magic tape are separated, the mounting ring is slid upward, the non-woven fabric is taken out, and the dirt on the non-woven fabric layer 44 is removed.

[0055] The above are preferred embodiments of the present application, which do not limit the protection scope of the present application, therefore: any equivalent changes made on the structure, shape, principle of the present application should be covered within the protection scope of the present application.

Claims

1. A municipal sewage treatment plant comprising a sewage treatment tank (1), characterised in that: The sewage treatment tank (1) is provided with a temporary storage cylinder (5), the bottom of the temporary storage cylinder (5) is provided in an inverted conical shape, and the bottom of the temporary storage cylinder (5) is provided with a flow guide hole (10), the temporary storage cylinder (5) is provided with a hollow floating ball (12), the floating ball (12) covers the flow guide hole (10) and is tightly attached to the side wall of the temporary storage cylinder (5), the floating ball (12) is provided with a plurality of balloons (18), in a natural state, the floating ball (12) is suspended in the temporary storage cylinder (5), the floating ball (12) is provided with a control member for controlling the up-and-down movement of the floating ball (12), the opening of the temporary storage cylinder (5) is communicated with a feeding pipe (7), the control member includes a reversing ring (19), a buoyancy ball (20), a pull rope (21) and a top column (22), the reversing ring (19) is connected to the bottom wall of the sewage treatment tank (1), one end of the pull rope (21) is connected to the floating ball (12), the other end of the pull rope (21) passes through the reversing ring (19) and is connected to the buoyancy ball (20), the bottom of the top column (22) is provided with a magnetic force member (29) which is magnetically repulsive to the electromagnet (27), the top column (22) supports the floating ball (12), a gap is formed between the floating ball (12) and the bottom wall of the temporary storage cylinder (5), the sewage treatment tank (1) is provided with a vertically arranged guide pipe (23), the buoyancy ball (20) is slidably arranged in the guide pipe (23), the bottom wall of the guide pipe (23) is provided with an electric control switch (25), the electric control switch (25) is electrically connected to the electromagnet (27) through a control system, the floating ball (12) includes a first arc ball (13) and a second arc ball (14), the opening end of the first arc ball (13) is connected to a rubber tube (15), a plurality of air vents (16) are formed in the side wall of the rubber tube (15), one end of the rubber tube (15) away from the first arc ball (13) is connected to a connecting ring (17), the connecting ring (17) is threadedly connected to the second arc ball (14), a plurality of speed increasing holes (24) are formed in the side wall of the guide pipe (23), and the speed increasing holes (24) are through holes.

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