Scum cleaning device for secondary sedimentation tank

Abstract

The utility model relates to a secondary sedimentation tank scum cleaning device which comprises a plurality of scum discharging pipes arranged in a water distribution channel, the scum discharging pipes are vertically arranged, the lower ends of the scum discharging pipes are used for being connected to a secondary sedimentation tank, floating sleeves are arranged at the upper ends of the scum discharging pipes, and the floating sleeves are arranged on the scum discharging pipes in a sleeving mode and are in sliding fit with the scum discharging pipes. And the floating sleeve is communicated with the slag discharging pipe and vertically moves along the liquid level in the water distribution channel. When the liquid level in the water distribution channel changes, the floating sleeve can move along with the change of the liquid level, so that the upper end of the floating sleeve is always close to the liquid level but immersed in the liquid, the liquid in the water distribution channel can always flow out of the floating body, and meanwhile, sludge and the like floating on the liquid level can be driven to flow into the slag discharging pipe from the floating sleeve; and the wastewater flows into the secondary sedimentation tank.

Description

Technical Field

[0001] The present application relates to the technical field of secondary sedimentation tanks, and particularly to a floating scum cleaning device for a secondary sedimentation tank. Background Art

[0002] Currently, sewage treatment plants usually use a secondary sedimentation tank with peripheral inflow and peripheral outflow for sewage sedimentation treatment. Its form has a structure of single weir outflow at the periphery, that is, a single-phase or two-phase water distribution channel is provided on the inner periphery of the secondary sedimentation tank, and an inlet well and an outlet channel connected to the water distribution channel are provided on the outer side of the secondary sedimentation tank. In the water distribution channel of the secondary sedimentation tank, the liquid in the water distribution channel flows into the secondary sedimentation tank through the water distribution pipes distributed on the bottom surface of the water distribution channel. However, during the operation, due to the small density of floating scum and sludge, etc., they will float above the liquid level in the water distribution channel and form a large accumulation on the water surface.

[0003] In summer, due to the hot weather, the sludge floating scum will become caked and maggoty, and at the same time produce toxic and harmful odor, seriously polluting the surrounding air environment and endangering the physical health of the operating workers. In winter, the floating scum is extremely easy to freeze, becoming a major hidden danger for safe production. Therefore, it is usually necessary to manually clean the floating scum and sludge, and the cleaning method is usually to use a water gun for flushing, resulting in low efficiency.

[0004] Therefore, a new technical solution needs to be proposed to solve the above problems. Utility Model Content

[0005] In order to make it easier to clean the sludge floating in the water distribution channel, etc., the present application provides a floating scum cleaning device for a secondary sedimentation tank.

[0006] The floating scum cleaning device for a secondary sedimentation tank provided by the present application adopts the following technical solutions:

[0007] A floating scum cleaning device for a secondary sedimentation tank includes a plurality of slag discharge pipes arranged in the water distribution channel. The slag discharge pipes are arranged vertically. The lower end of the slag discharge pipe is used to connect to the secondary sedimentation tank. The upper end of the slag discharge pipe is provided with a floating sleeve. The floating sleeve is sleeved on the slag discharge pipe and is slidably matched with the slag discharge pipe. The floating sleeve is communicated with the slag discharge pipe. The floating sleeve moves vertically along the liquid level in the water distribution channel.

[0008] By adopting the above technical solution, when the liquid level in the water distribution channel changes, the floating sleeve can move with the change of the liquid level, so that the upper end of the floating sleeve is always close to the liquid level but immersed in the liquid, enabling the liquid in the water distribution channel to always flow out from the floating body, and at the same time being able to drive the sludge floating on the liquid surface, etc. to flow into the slag discharge pipe from the floating sleeve and then flow into the secondary sedimentation tank.

[0009] Optionally, a floating body is arranged outside the floating sleeve, and the lower end surface of the floating body is higher than the upper end surface of the floating sleeve.

[0010] By adopting the above technical solution, an upward buoyancy force is exerted on the floating sleeve by the floating body, so that the floating sleeve can move with the change of the liquid level, and the floating body can generate sufficient upward buoyancy force only after a part of it is immersed in the liquid. By arranging the lower end of the floating sleeve below the lower end surface of the floating body, the upper end of the floating sleeve can always be located below the liquid level.

[0011] Optionally, a plurality of connecting rods are coaxially fixed outside the floating sleeve, and one end of the connecting rod far from the floating sleeve is connected to the floating body.

[0012] By adopting the above technical solution, the buoyancy force of the floating body is transmitted to the floating sleeve by the connecting rod, so that it is not necessary to arrange the floating body close to the floating sleeve, and the floating body is not likely to hinder the movement of the sludge flowing towards the upper opening of the floating sleeve, so that the sludge can flow into the floating sleeve normally.

[0013] Optionally, the middle part of the connecting rod is integrally recessed downward.

[0014] By adopting the above technical solution, a gap is left between the connecting rod and the liquid level, so that the connecting rod will not hinder the flow of the sludge floating on the liquid surface.

[0015] Optionally, a guide pipe is coaxially arranged at the lower end of the floating sleeve, and the diameter of the lower end of the guide pipe is larger than the diameter of the connection part between the guide pipe and the floating sleeve.

[0016] By adopting the above technical solution, the area of the opening of the guide pipe towards the slag discharge pipe is increased by the guide pipe, so that the lower end of the guide pipe is more easily sleeved on the slag discharge pipe, and the floating sleeve can be more easily sleeved on the slag discharge pipe by the guiding of the guide pipe, making the installation of the floating sleeve more convenient.

[0017] Optionally, a plurality of water passing holes are penetrated on the outer wall of the diameter-varying part of the guide pipe.

[0018] By adopting the above technical solution, a space with an opening facing downwards is not formed between the inner wall of the guide pipe and the outer wall of the slag discharge pipe by the water passing holes, so that the sludge is not easy to continue between the guide pipe and the slag discharge pipe, affecting the process of the sludge floating upwards and being discharged.

[0019] Optionally, a rotating ring is coaxially and rotatably connected outside the floating sleeve, and one end of the connecting rod close to the floating sleeve is fixed on the rotating ring.

[0020] By adopting the above technical solution, the floating body can be driven to rotate during the flow of the liquid, and the floating body can separate the agglomerated sludge, etc., so that the sludge is more easily introduced into the floating sleeve and discharged from the water distribution channel.

[0021] Optionally, both ends of the floating body facing and opposite to its rotation direction are provided with a forward-inclined bow.

[0022] By adopting the above technical solution, the movement of the floating body is made smoother. At the same time, even if there is liquid splashing onto the floating body during the movement of the floating body, it is not easy to splash outside the water distribution channel.

[0023] In summary, the present application includes at least one of the following beneficial technical effects:

[0024] 1. By providing a floating sleeve that can float up and down with the liquid level, the upper end opening of the floating sleeve is always located below the liquid level and close to the liquid level, so that the liquid can always flow into the floating sleeve, and the sludge floating on the liquid surface can also flow into the floating sleeve and be discharged from the water distribution channel;

[0025] 2. The agglomerated sludge is divided by the movement of the floating body, so that the sludge is not easily unable to enter the floating sleeve due to caking. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram for showing the position of the scum pipe in the embodiment of the present application;

[0027] Figure 2 It is a schematic diagram for showing the connection relationship between the floating sleeve and the scum pipe in the embodiment of the present application.

[0028] In the figure, 1 is a slag discharge pipe; 2 is a floating sleeve; 21 is a rotating ring; 22 is a connecting rod; 23 is a guide pipe; 231 is a water passing hole; 3 is a floating body. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0029] The following further describes the present application in detail with reference to the drawings.

[0030] A secondary sedimentation tank scum cleaning device disclosed in the present application, as Figure 1 and Figure 2 shown, includes a plurality of slag discharge pipes 1 vertically arranged in the water distribution channel. The upper end of the slag discharge pipe 1 is arranged lower than the upper end surface of the water distribution channel. The lower end of the slag discharge pipe 1 passes through the water distribution channel and is communicated with the secondary sedimentation tank, so as to input the sludge and the like entering the slag discharge pipe 1 into the secondary sedimentation tank. The upper end of the slag discharge pipe 1 is also sleeved with a floating sleeve 2. The inner wall of the floating sleeve 2 is attached to the outer wall of the slag discharge pipe 1 and can slide along the axis of the slag discharge pipe 1. The floating sleeve 2 is communicated with the slag discharge pipe 1, so that the sludge and the like entering the floating sleeve 2 enter the slag discharge pipe 1.

[0031] A rotating ring 21 is coaxially and rotatably connected to the floating sleeve 2. The rotating ring 21 is connected to the floating sleeve 2 through a bearing, so that the rotating ring 21 can rotate on the outer wall of the floating sleeve 2. Two horizontally arranged connecting rods 22 are circumferentially arranged on the rotating ring 21. The two connecting rods 22 are respectively arranged on both sides of the rotating ring 21. Floating bodies 3 are arranged at the mutually remote ends of the connecting rods 22. The floating bodies 3 can float in the liquid in the water distribution channel. The floating bodies 3 are hollow. The lower end surface of the floating body 3 is lower than the upper end surface of the floating sleeve 2. Thus, when the floating body 3 floats on the liquid surface of the water distribution channel, the upper end of the floating sleeve 2 can be driven by the floating body 3 to be immersed in the liquid surface of the water distribution channel, and the upper end of the floating sleeve 2 can still be arranged close to the liquid surface, so that sludge and the like floating on the liquid surface can still normally enter the floating sleeve 2. After the liquid level in the water distribution channel drops, the upper end of the floating sleeve 2 can still be driven by the floating body 3 to move downward as the liquid level drops, so that the upper end opening of the floating sleeve 2 is always below the liquid surface and close to the liquid surface.

[0032] Since the upper end of the floating sleeve 2 is arranged close to the liquid surface, and the floating bodies 3 float on the liquid surface, the connecting rods 22 connecting the floating sleeve 2 and the floating bodies 3 are arranged close to the liquid surface in the shortest case. However, the certain thickness of the connecting rods 22 will cause the upper ends of the connecting rods 22 to extend out of the liquid surface, and the connecting rods 22 extending out of the liquid surface will hinder the movement of the sludge on the liquid surface. Therefore, the middle part of the connecting rod 22 is integrally concave downward, so that the connecting rod 22 is integrally U-shaped. When the connecting rod 22 connects the floating body 3 and the floating sleeve 2, the upper end of the connecting rod 22 will no longer be close to the liquid surface, so that the connecting rod 22 no longer hinders the flow of sludge and the like floating on the liquid surface.

[0033] Since the cooperation between the floating sleeve 2 and the slag discharge pipe 1 is relatively tight, it is difficult to connect the floating sleeve 2 to the slag discharge pipe 1. Therefore, a guide pipe 23 is coaxially arranged at the lower end of the floating sleeve 2. The diameter of the lower end of the guide pipe 23 is larger than the diameter of the connection part between the guide pipe 23 and the floating sleeve 2, so that the lower end of the guide pipe 23 is flared. When connecting the floating sleeve 2 to the slag discharge pipe 1, the sleeving direction of the floating sleeve 2 is guided by the guide pipe 23, so that the slag discharge pipe 1 can more easily enter the lower end opening of the floating sleeve 2, making the installation of the floating sleeve 2 more convenient.

[0034] Since a space with a downward opening will be formed between the lower end opening of the guide pipe 23 and the outer wall of the slag discharge pipe 1, some sludge will continue to stay in this space during the upward floating process of the sludge, thus affecting the discharge of the sludge. Therefore, a number of water passing holes 231 penetrate through the outer wall of the enlarged diameter part of the guide pipe 23, so that the enlarged diameter part of the guide pipe 23 and the slag discharge pipe 1 no longer form a complete space, and the sludge will no longer accumulate.

[0035] During the process of liquid flow in the water inlet channel, the floating body 3 will be driven to move together. The moving floating body 3 can separate agglomerated sludge, etc., so that the sludge can better enter the slag discharge pipe 1. At the same time, when the floating body 3 rotates, it will cause a certain amount of liquid splashing, resulting in pollution. Therefore, both ends of the floating body 3 facing and back to its rotation direction are set with a forward inclination. By reducing the area of the end face of the floating body 3, the movement of the floating body 3 is made smoother. At the same time, when the floating body 3 moves, the liquid is not easily splashed onto the surface of the floating body 3 and outside the water inlet channel.

[0036] The implementation principle of this embodiment is as follows: The guide pipe 23 on the floating sleeve 2 is sleeved downward on the slag discharge pipe 1. Then, the floating body 3 is immersed in the liquid. The floating body 3 applies an upward buoyancy force to the floating sleeve 2 to limit the upper end position of the floating sleeve 2. The liquid level in the water distribution channel is higher than the upper end of the floating sleeve 2 and thus flows towards the inside of the floating sleeve 2. At the same time, it also drives the sludge, etc., towards the inside of the floating sleeve 2, realizing that the sludge in the water distribution channel is not easily accumulated.

[0037] The embodiments of this specific implementation manner are all preferred embodiments of this application. The protection scope of this application is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of this application should be covered within the protection scope of this application.

Claims

1. A secondary sedimentation tank scum cleaning device, characterized in that: The invention comprises a plurality of slag discharge pipes (1) arranged in a water distribution channel, wherein the slag discharge pipes (1) are arranged vertically, the lower ends of the slag discharge pipes (1) are used to be connected to a secondary sedimentation tank, and the upper ends of the slag discharge pipes (1) are provided with floating sleeves (2), the floating sleeves (2) are sleeved on the slag discharge pipes (1) and are slidably matched with the slag discharge pipes (1), the floating sleeves (2) are connected with the slag discharge pipes (1), and the floating sleeves (2) move vertically along the liquid surface in the water distribution channel.

2. A secondary sedimentation tank scum cleaning device according to claim 1, characterized in that: A floating body (3) is arranged outside the floating sleeve (2), and the lower end surface of the floating body (3) is higher than the upper end surface of the floating sleeve (2).

3. A secondary sedimentation tank scum cleaning device according to claim 2, characterized in that: A plurality of connecting rods (22) are coaxially fixed outside the floating sleeve (2), and one end of the connecting rod (22) away from the floating sleeve (2) is connected to the floating body (3).

4. A secondary sedimentation tank scum cleaning device according to claim 3, characterized in that: The middle part of the connecting rod (22) is concave downward as a whole.

5. The secondary sedimentation tank scum cleaning device according to claim 1, characterized in that: A guide tube (23) is coaxially arranged at the lower end of the floating sleeve (2), and the diameter of the lower end of the guide tube (23) is larger than the diameter of the connection between the guide tube (23) and the floating sleeve (2).

6. A secondary sedimentation tank scum cleaning device according to claim 5, characterized in that: A plurality of water holes (231) are formed through the outer wall of the portion of the guide tube (23) where the diameter increases.

7. A secondary sedimentation tank scum cleaning device according to claim 3, characterized in that: The floating sleeve (2) is coaxially rotatably connected to a rotating ring (21) outside, and one end of the connecting rod (22) close to the floating sleeve (2) is fixed on the rotating ring (21).

8. A secondary sedimentation tank scum cleaning device according to claim 2, characterized in that: The ends of the floating body (3) facing and facing away from the rotation direction are both arranged in a forward-leaning manner.

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