A rainwater collection pond for high-density polyethylene geomembrane lining

Abstract

This utility model discloses a rainwater collection tank for high-density polyethylene (HDPE) geomembrane lining, comprising an initial rainwater collection tank, a collection cavity with HDPE geomembrane lining the inner sidewalls of the cavity, the outer edge of the opening forming the top of the slope and the inner edge forming the toe of the slope, a sump, and a rainwater lifting pump station including a secondary rainwater collection tank. Hot melt adhesive is used at the connection between the connecting pipe and the collection trough. The resulting initial rainwater collection tank has a simple structure and is easy to construct. The use of HDPE geomembrane lining on its inner side reduces investment costs by more than 60% compared to traditional reinforced concrete tanks. A connecting pipe connects the rainwater lifting pump station and the initial rainwater collection tank, and this connecting pipe is interconnected with the sump where the initial rainwater collection tank primarily stores rainwater, enabling rainwater transfer. Simultaneously, hot melt adhesive is used at the connection between the connecting pipe and the collection trough to increase connection stability and sealing.

Description

Technical Field

[0001] This utility model relates to the field of rainwater harvesting equipment, and in particular to a rainwater harvesting tank for high-density polyethylene geomembrane paving. Background Technology

[0002] The electrolytic aluminum production process uses molten salt electrolysis, with alumina and fluoride salts as raw materials. During electrolysis, some fluorides volatilize with the electrolysis flue gas and disperse throughout the electrolysis plant area. In the initial stages of rainfall, rainwater washes away rooftops and asphalt concrete roads, carrying these dispersed fluorides into the rainwater drainage system. This results in some fluoride-containing pollutants in the initial rainwater. Fluoride-containing wastewater discharged into water bodies can cause pH imbalances, and long-term accumulation in the soil can hinder plant photosynthesis and even reduce yields of rice and wheat. With increasingly stringent environmental requirements, according to the relevant provisions of GB 50988-2014 "Code for Design of Environmental Protection Engineering for Nonferrous Metals Industry," local environmental protection departments typically require electrolytic aluminum plants to be equipped with initial rainwater collection ponds. Conventional initial rainwater collection ponds are made of reinforced concrete, and their volume is often several thousand to tens of thousands of cubic meters, making them very expensive. Summary of the Invention

[0003] The purpose of this invention is to provide a rainwater collection tank for high-density polyethylene geomembrane paving, in order to solve the problem that existing rainwater collection tanks are usually made of reinforced concrete, which are very expensive.

[0004] The technical solution of this utility model is as follows: A rainwater collection tank for high-density polyethylene geomembrane paving, comprising an initial rainwater collection tank, wherein the upper end face of the initial rainwater collection tank forms an outward-facing collection cavity.

[0005] The inner sidewall of the collection cavity is lined with a high-density polyethylene geomembrane, and the outer edge of the opening is the top of the slope and the inner edge is the toe of the slope. The height of the top of the slope is greater than the height of the toe of the slope, and an inclined slope is formed between the two.

[0006] A water collection pit is provided with an outward-facing collection trough on the upper surface of the water collection pit, and is located on the bottom wall of the inner side of the collection cavity, with the opening of the collection trough located at the inner edge of the opening of the collection cavity.

[0007] A rainwater lifting pump station, the rainwater lifting pump station including a secondary rainwater collection tank, which is set on one side of the initial rainwater collection tank and forms a storage cavity inside;

[0008] A connecting pipe, one end of which is connected to and communicates with the storage cavity, and the other end is connected to and communicates with the inside of the collection tank. Hot melt adhesive is provided at the connection between the connecting pipe and the collection tank.

[0009] Furthermore, the rainwater lifting pump station also includes a lifting pump station, which is located above the secondary rainwater collection tank and has a pump working cavity formed inside. Multiple sets of pumps connected to the storage cavity are provided inside the pump working cavity, and each pump is equipped with a drain pipe.

[0010] Furthermore, a waterproof sleeve is provided at the connection between the connecting pipe and the storage cavity.

[0011] Furthermore, the connecting pipe is made of high-density polyethylene material.

[0012] Furthermore, a water inlet pipe is provided at the top of the slope.

[0013] Furthermore, the lowest water level line stored inside the storage cavity is the same as the bottom elevation line of the initial rainwater collection pool.

[0014] Furthermore, the slope of the inclined surface formed by the slope toe line and the slope crest line is 1:1.5.

[0015] The advantages of this invention compared to existing technologies are as follows: the resulting initial rainwater collection tank has a simple structure, is easy to construct, and is lined with a high-density polyethylene (HDPE) geomembrane, reducing investment costs by more than 60% compared to traditional reinforced concrete tanks. Furthermore, a rainwater lifting pump station is installed in conjunction with the initial rainwater collection tank for further treatment of the collected rainwater. A connecting pipe is installed between the rainwater lifting pump station and the initial rainwater collection tank, and this connecting pipe is interconnected with the main rainwater collection pit in the initial rainwater collection tank, enabling rainwater transfer. Simultaneously, hot melt adhesive is used at the connection between the connecting pipe and the collection trough to increase connection stability and sealing. Attached Figure Description

[0016] Figure 1 This is a panoramic view of the overall implementation scheme of this utility model;

[0017] Figure 2 This is a partial plan view of the present invention;

[0018] Figure 3 for Figure 1 Sectional view at point AA along the middle. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0021] Furthermore, the use of terms such as "first" and "second" in this utility model is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0022] See Figure 1-3 This invention discloses a rainwater collection tank for high-density polyethylene geomembrane paving, comprising an initial rainwater collection tank 1, wherein the upper end face of the initial rainwater collection tank forms an outward-facing collection cavity 12, the inner side wall of the collection cavity 12 is paved with high-density polyethylene geomembrane, and the outer edge of the opening forms a slope crest line 10, and the inner edge forms a slope toe line 11, the height of the slope crest line being greater than the height of the slope toe line, forming an inclined slope between the two; and a collection pit 2, wherein the upper end face of the collection pit 2 is provided with an outward-facing collection trough 20, and is equipped with... The opening of the collection trough 20 formed on the inner bottom wall of the collection cavity 12 is located at the inner edge of the opening of the collection cavity 12; the rainwater lifting pump station 4 includes a secondary rainwater collection tank 40, which is set on one side of the initial rainwater collection tank 1, and a storage cavity 400 is formed inside it; in use, rainwater is collected through the formed initial rainwater collection tank 1, and the side wall of the collection cavity 12 formed inside the initial rainwater collection tank 1 is covered with a high-density polyethylene (HDPE) geomembrane, and the tank is not reinforced concrete. The opening of the formed initial rainwater collection tank 1 is set with a certain slope, with the higher one being the top line 10 and the lower one being the toe line 11. The shape of the initial rainwater collection tank is not restricted, and it can be used on the site within the factory area that has no utilization value, making full use of the "corner waste" location of the factory area and improving the utilization rate of the site. The bottom and slope of the initial rainwater collection pond are made of compacted plain soil with a compaction coefficient of 0.95. The slope of the inclined surface formed by the slope toe line 11 and slope top line 10 is usually 1:1.5.

[0023] Simultaneously, a rainwater lifting pump station 4 transports the rainwater collected in the initial rainwater collection tank 1 to the sewage treatment equipment for further purification. A collection pit 2 with an opening height equal to the slope toe line 11 is installed in the initial rainwater collection tank 1 to maximize rainwater collection efficiency. The design maximum water level of the initial rainwater collection tank is determined by the inlet pipe elevation of the inlet pipe 13 located at the slope crest line 10. For example... Figure 2 In this system, the bottom elevation of the collection pit is located at point e on the inner bottom wall of the collection trough 20 inside the collection pit 2. The highest water level b designed for the initial rainwater collection tank 1 is located below the designed ground elevation a. At this point, the lowest water level c of the storage chamber 400 inside the secondary rainwater collection tank 40 is the same as the bottom elevation d of the initial rainwater collection tank, which is also the same height as the overall height of the collection pit 2. Furthermore, a connecting pipe 3 is installed, with one end connected to the storage chamber 40 and the other end connected to the inner side of the collection trough 20. Hot melt adhesive 5 is provided at the connection between the connecting pipe 3 and the collection trough 20, and a waterproof sleeve 6 is provided at the connection between the connecting pipe 3 and the storage chamber 40. This allows rainwater inside the collection pit 2 to be transferred to the secondary rainwater collection tank 40. The connecting pipe 3 is made of high-density polyethylene material. One end of the high-density polyethylene pipe is connected to the geomembrane on the inner wall of the sump using a hot-melt method to ensure water tightness. The other end of the high-density polyethylene pipe is connected to the reinforced concrete secondary rainwater collection tank 40 using a waterproof sleeve to ensure a seal, so that the initial rainwater does not seep out and avoids environmental pollution.

[0024] In this embodiment, more specifically, the rainwater lifting pump station 4 further includes a lifting pump station 41. The lifting pump station 41 is located above the secondary rainwater collection tank 40, and its inner side forms a pump working cavity 410. Multiple sets of pumps 8 connected to the storage cavity 400 are provided inside the pump working cavity 410, and each pump 8 is equipped with a drain pipe 9. When rainwater enters the storage cavity inside the secondary rainwater collection tank 40, the collected rainwater is pumped out by the lifting pump station 41 with pumps 8 located above the secondary rainwater collection tank 40 and discharged through the drain pipe 9 into the sewage treatment equipment for further purification and reuse.

[0025] In addition to the preferred embodiments described above, there are other embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection claimed by this utility model.

Claims

1. A rainwater collection tank for high-density polyethylene geomembrane paving, comprising an initial rainwater collection tank (1), wherein the upper end face of the initial rainwater collection tank (1) forms an outward-facing collection cavity (12), characterized in that, The inner sidewall of the collection cavity (12) is lined with a high-density polyethylene geomembrane, and the outer edge of the opening is the top line (10), and the inner edge is the toe line (11). The height of the top line (10) is greater than the height of the toe line (11), and an inclined slope is formed between the two. A water collection pit (2) is provided on the upper end face of the water collection pit (2) with an outward-facing collection trough (20), and is provided on the bottom wall of the inner side of the collection cavity (12). The opening of the collection trough (20) is located at the inner edge of the opening of the collection cavity (12). The rainwater lifting pump station (4) includes a secondary rainwater collection tank (40), which is located on one side of the initial rainwater collection tank (1) and forms a storage cavity (400) on the inner side. A connecting pipe (3) is provided at one end, which is connected to the storage cavity (400) and the other end is connected to the inside of the collection tank (20). Hot melt adhesive (5) is provided at the connection between the connecting pipe (3) and the collection tank (20).

2. A rainwater harvesting tank for high-density polyethylene geomembrane lining according to claim 1, characterized in that, The rainwater lifting pump station (4) also includes a lifting pump station (41), which is located on the upper side of the secondary rainwater collection tank (40) and forms a pump working cavity (410) on its inner side. Multiple sets of pumps (8) connected to the storage cavity (400) are provided inside the pump working cavity (410), and the pumps (8) are provided with drainage pipes (9).

3. A rainwater harvesting tank for high-density polyethylene geomembrane lining according to claim 1 or 2, characterized in that, A waterproof sleeve (6) is provided at the connection between the connecting pipe (3) and the storage cavity (400).

4. A rainwater harvesting tank lined with high-density polyethylene geomembrane according to claim 3, characterized in that, The connecting pipe (3) is made of high-density polyethylene.

5. A rainwater harvesting tank lined with high-density polyethylene geomembrane according to claim 4, characterized in that, A water inlet pipe (13) is provided at the top of the slope (10).

6. A rainwater harvesting tank lined with high-density polyethylene geomembrane according to claim 5, characterized in that, The lowest water level inside the storage chamber (400) is the same as the bottom elevation of the initial rainwater collection pool (1).

7. A rainwater harvesting tank lined with high-density polyethylene geomembrane according to claim 5, characterized in that, The slope of the inclined surface formed by the slope toe line (11) and the slope crest line (10) is 1:1.5.

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