A floating cover structure on a sewage pool

Abstract

The present invention provides a floating cover structure on a sewage tank, which includes a floating cover membrane on the sewage tank. There is a floating body under the floating cover membrane, and a weight pipe is arranged above the floating cover membrane. The floating body under the membrane is an arch with a gradually changing height, and the floating bodies under the membrane are all longitudinally arranged in parallel. A weight pipe in the same direction is arranged above the floating cover membrane between any longitudinally parallel floating bodies under the membrane. The weight pipe is a pipe with a gradually changing diameter. The water accumulation drainage system includes a water collection pier and a submersible pump. The water collection pier is connected in series to the weight pipe. The water collection pier forms a water collection pit on the floating cover membrane to guide the accumulated water on the membrane to flow. A submersible pump is fixed on the water collection pier, and the submersible pump is connected with a drainage pipe. This structure can effectively guide the accumulated water on the membrane to flow, and creatively proposes a design scheme for the water collection pit on the membrane. The water collection pit provides a support space for the fixation of the water pump, effectively improving the drainage efficiency of the accumulated water on the membrane. This structure has fewer fastening parts, and all materials are easy to process and obtain, effectively saving production costs.

Description

Technical Field

[0001] The present invention relates to the technical field of sewage tank treatment, and particularly relates to a floating cover structure on a sewage tank. Background Art

[0002] Landfill leachate or other industrial wastewater is usually collected in sewage tanks. Generally, a floating cover is formed by installing a flexible membrane to isolate the malodorous gas generated by the fermentation of the leachate. That is, a membrane is covered on the sewage tank and floats on the sewage surface to form a closed cavity shell with the sewage tank, and is anchored around. Existing sewage tanks usually adopt an inverted hanging membrane structure, and the floating cover is realized by installing a suspension device. For some large sewage tanks, due to the large span, a floating cover membrane is usually directly covered, and a number of floating bodies are arranged under the membrane to carry the floating cover membrane. The existing problems are as follows: 1. Rigid components are used for the floating cover hoisting. The sewage tank is a permanent project, and there are many maintenance parts for a large number of hoisting components, which consumes a lot of manpower; 2. If a floating body floating cover membrane is adopted, the corresponding area covered on the sewage tank is also large, and the drainage problem is particularly critical. Especially in winter, if the water accumulated on the floating cover cannot be processed in time, the water freezes at low temperature, and the ice cubes float up and down with the liquid level, which has a potential risk of piercing the membrane material; 3. The weight pressing pipe is pressed on the surface of the floating cover membrane, and the accumulated water flows along the weight pressing pipe. Generally, a manual water pump is used for pumping, which is time-consuming and laborious; 4. During the rainy season, the precipitation is large, and a large amount of water accumulates on the floating cover membrane in a short time, which is likely to cause poor air conduction. The floating cover in the regulating tank forms a large bulge, causing the membrane material to fold back and forth on a large area, which has a potential risk of causing accidents. Summary of the Invention

[0003] In order to overcome the deficiencies existing in the prior art, the present invention provides a floating cover structure on a sewage tank.

[0004] The present invention is realized through the following technical solutions: A floating cover structure on a sewage tank includes a floating cover membrane on the sewage tank, floating bodies under the membrane are arranged below the floating cover membrane, a weight pressing pipe is arranged above the floating cover membrane, and a water drainage system on the membrane is further included. The floating bodies under the membrane are in an arch shape with gradually changing height, and the floating bodies under the membrane are all longitudinally arranged in parallel. A weight pressing pipe in the same direction is arranged above the floating cover membrane between any longitudinally parallel floating bodies under the membrane. The weight pressing pipe is in a tubular shape with gradually changing diameter; the water drainage system includes a water collecting pier and a submersible pump. The water collecting piers are connected in series on the weight pressing pipe. The water collecting piers form a water collecting pit on the floating cover membrane to guide the accumulated water on the membrane to flow, a submersible pump is fixed on the water collecting pier, and the submersible pump is connected with a drain pipe.

[0005] In the above solution, a fixed pipe is arranged at the center of the water collecting pier, and the submersible pump is fixedly arranged in the fixed pipe.

[0006] In the above solution, the height of the floating bodies under the membrane gradually decreases from the center of the sewage tank to both sides to form an upward convex arch bridge. The diameter of the weight pressing pipe gradually increases from the center of the sewage tank to both sides, and the water collecting piers are close to both sides of the sewage tank.

[0007] In the above solution, the height of the floating body under the membrane gradually decreases from both sides of the sewage tank to the center, forming a concave bridge. The diameter of the weight-bearing pipe gradually decreases from both sides of the sewage tank to the center, and the water-collecting pier is close to the center of the sewage tank.

[0008] In the above solution, the height of the floating body under the membrane gradually decreases from one side of the sewage tank to the other side, forming a convex arch bridge. The diameter of the weight-bearing pipe gradually increases from one side of the sewage tank to the other side, and the water-collecting pier is close to the lowest side of the arch bridge of the sewage tank.

[0009] In the above solution, the floating body unit is a foam block, and the outer surface of the floating body unit is wrapped with an HDPE membrane.

[0010] In the above solution, the floating body under the membrane is formed by connecting several floating body units in series.

[0011] In the above solution, the weight-bearing pipe is formed by connecting several round pipes in series.

[0012] In the above solution, the water-collecting pier is in the shape of a "field" or a "day" formed by welding round pipes, and all four corners are bent pipes.

[0013] Compared with the prior art, the beneficial effects of a floating cover structure on a sewage tank according to the present invention are as follows:

[0014] 1. Under the combined action of the gradually changing floating strips under the membrane and the gradually changing gravity pressure pipe group on the membrane, the floating cover forms an arch structure, which can effectively guide the accumulated water flow on the membrane;

[0015] 2. A water-collecting pit design scheme on the membrane is creatively proposed. The water-collecting pit provides a support space for the fixation of the water pump, effectively improving the drainage efficiency of the accumulated water on the membrane;

[0016] 3. The structure has fewer fastening parts, and all materials are easy to process and obtain, effectively saving production costs. Description of the Drawings

[0017] Figure 1 It is a front structural schematic diagram of a floating cover structure on a sewage tank according to the present invention.

[0018] Figure 2 is Figure 1 a cross-sectional view taken along F-F in

[0019] In the figure: 1. floating cover membrane, 2. floating body under the membrane, 3. floating body unit, 4. weight-bearing pipe, 5. water-collecting pier, 6. submersible pump, 7. drain pipe, 8. water-collecting pit, 9. sewage, 10. sewage tank. Detailed Embodiments

[0020] The following describes the embodiments of a floating cover structure on a sewage tank according to the present invention in conjunction with the drawings and specific embodiments.

[0021] Figure 1 This is a front structural schematic diagram of a floating cover structure on a sewage tank according to the present invention. Figure 2 is Figure 1 The cross-sectional view taken along F-F in the figure. In the figure, the floating cover structure includes a floating cover film 1 on the sewage tank 10. A floating body 2 is provided below the floating cover film 1, and a weight pipe 4 is provided above the floating cover film 1. It also includes a water accumulation drainage system on the film. The floating body 2 is formed by connecting a plurality of floating body units 3 in series to form an upward convex arch bridge. The height of the floating body unit 3 gradually decreases from the center of the sewage tank 10 to both sides to form an arch shape. The floating bodies 2 under the film are all arranged longitudinally and parallel to each other. A weight pipe 4 in the same direction is provided above the floating cover film 1 between any two longitudinally parallel floating bodies 2 under the film. The diameter of the weight pipe 4 gradually increases from the center of the sewage tank 10 to both sides; the water accumulation drainage system includes a water collection pier 5 and a submersible pump 6. The weight pipe 4 near the side of the sewage tank 10 is connected in series with the water collection pier 5. The weight pipe 4 and the water collection pier 5 form a water collection pit 8 on the floating cover film 1. The submersible pump 6 is fixed on the water collection pier 5, and the submersible pump 6 is connected with a drain pipe 7. The water collection pier 5 is in a shape of a Chinese character 'tian' welded by round pipes, and all four corners are bent pipes. A fixed pipe is arranged in the center of the water collection pier 5, and the submersible pump 6 is fixedly arranged in the fixed pipe. The floating body unit 3 is a foam block, and the outer surface of the floating body unit 3 is wrapped with an HDPE film. The weight pipe 4 is formed by connecting a plurality of round pipes in series.

[0022] The usage state of the floating cover film is that as the liquid level of the sewage 9 in the sewage tank 10 gradually rises, the upward convex floating body 2 under the film is lifted by the sewage 9, and then the floating cover film 1 is gradually pushed up from the center of the sewage tank 10 to both sides to form an arch shape. At the same time, the weight pipe 4 presses on the floating cover film 1 between adjacent floating bodies 2 under the film, so that the upper surface of the floating cover film 1 forms a guiding direction for the flowing of accumulated water. The accumulated water is then guided to the water collection piers 5 on both sides until it flows into the water collection pit 8 formed by the weight pipe 4 pressing on the floating cover film 1 under the water collection pier 5. Finally, the accumulated water is pumped out from the drain pipe 7 by the submersible pump 6 to complete the drainage operation.

[0023] The present invention also has two other structures. One is a medium-span pool, that is, the height of the floating body 2 under the film gradually decreases from both sides of the sewage tank 10 to the center to form a downward concave bridge, the water collection pit 8 is arranged in the middle of the sewage tank 10, and the diameter of the weight pipe 4 gradually increases from both sides of the sewage tank 10 to the center, with both sides high and the middle low; the other is a small-span pool, that is, the floating body 2 under the film is high on one side and low on the other side to form a ramp-like upward convex arch bridge, the water collection pit 8 is arranged at the bottom side of the ramp, and the diameter of the weight pipe 4 gradually increases from the high side of the floating body 2 under the film to the low side.

[0024] The present invention designs a floating cover structure for a sewage tank. Under the combined action of the gradually changing floating strips under the membrane and the gradually changing gravity pressure pipe group on the membrane, the floating cover forms an arched structure. This structure can effectively guide the accumulated water flow on the membrane, and creatively proposes a design scheme for a sump on the membrane. The sump provides a support space for the fixation of the water pump, effectively improving the drainage efficiency of the accumulated water on the membrane. This structure has few fastening parts, and all materials are easy to process and obtain, effectively saving production costs.

[0025] The above are only preferred embodiments of the present invention, and do not impose any form of limitation on the present invention. Although the present invention has been disclosed above with preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some changes or modifications within the scope of the technical solution of the present invention to obtain equivalent embodiments with equivalent changes. However, as long as the content does not depart from the technical solution of the present invention, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A floating cover structure on a sewage tank, comprising a floating cover membrane on the sewage tank, a floating body under the floating cover membrane, and a weight pipe above the floating cover membrane, characterized in that: It also includes a water drainage system for accumulated water on the membrane. The floating bodies under the membrane are in the shape of an arch with a gradually changing height. The floating bodies under the membrane are arranged longitudinally and parallel to each other. Between any longitudinally parallel floating bodies under the membrane above the floating cover membrane, there are weight pipes in the same direction. The weight pipes are in the shape of a tube with a gradually changing diameter. The water drainage system includes water collection piers and submersible pumps. The water collection piers are connected in series on the weight pipes. The water collection piers form water collection pits on the floating cover membrane to guide the accumulated water on the membrane to flow. Submersible pumps are fixed on the water collection piers, and the submersible pumps are connected with drain pipes. A fixed pipe is arranged at the center of the water collection pier, and the submersible pump is fixedly arranged in the fixed pipe. The height of the floating bodies under the membrane gradually decreases from the center of the sewage tank to both sides, forming a convex upward arch bridge. The diameter of the weight pipes gradually increases from the center of the sewage tank to both sides. The water collection piers are close to both sides of the sewage tank. Or the height of the floating bodies under the membrane gradually decreases from both sides of the sewage tank to the center, forming a concave downward bridge. The diameter of the weight pipes gradually decreases from both sides of the sewage tank to the center. The water collection piers are close to the center of the sewage tank. Or the height of the floating bodies under the membrane gradually decreases from one side of the sewage tank to the other side, forming a convex upward arch bridge. The diameter of the weight pipes gradually increases from one side of the sewage tank to the other side. The water collection piers are close to the lowest side of the arch bridge of the sewage tank. The floating bodies under the membrane are formed by connecting a number of floating body units in series.

2. The floating cover structure on the sewage pool according to claim 1, characterized in that: The floating body units are foam blocks, and the outer surfaces of the floating body units are wrapped with HDPE membranes.

3. The floating cover structure on the sewage tank according to claim 1, characterized in that: The weight pipes are formed by connecting a number of round pipes in series.

4. The floating cover structure on the sewage tank according to claim 1, characterized in that: The water collection piers are in the shape of a "field" or "day" formed by welding round pipes, and the four corners are bent pipes.

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