CN205206020U - Be used for filterable rainwater water inlet of initial stage rainwater to block dirty sieve - Google Patents

Abstract

The utility model discloses a rainwater inlet trash screen used for initial rainwater filtration, which comprises a rainwater outlet whose lower part communicates with municipal pipelines, a rainwater grate is arranged at the upper end of the rainwater inlet, and at least one rainwater grate is arranged below the rainwater grate. A filter layer, a nitrogen and phosphorus adsorption structure is provided between the rainwater grate and the filter layer; a deflector for guiding rainwater to the filter layer is provided below the rainwater grate. The beneficial effects of the utility model are: the nitrogen and phosphorus elements in the rainwater are effectively adsorbed by the nitrogen and phosphorus adsorption structure, effectively reducing the pollution caused by the rainwater to the river; The debris is filtered to effectively avoid the blockage of the municipal pipeline caused by impurities; through the setting of the deflector, it is effectively ensured that the rainwater first passes through the filter layer and then flows into the municipal pipeline.

Description

A rainwater inlet trash screen for primary rainwater filtration

technical field

The utility model relates to rainwater treatment, in particular to a rainwater inlet trash screen used for initial rainwater filtration.

Background technique

The development of urbanization in my country has led to the increase of impermeable roads in cities, and the sudden urban waterlogging caused by rainstorm runoff has become an important reason for cities to "look at the sea". With the increase of high-rise buildings in the city, in midsummer, building air conditioners and vehicle exhaust will aggravate the city's "rain island effect", and rainfall runoff will carry a large amount of pollutants. However, the maintenance and management of existing urban drainage facilities are poor, and most urban drainage pipe networks are seriously silted up. So need to seek a kind of novel rainwater runoff filtering device that is applicable to existing street pavement. In addition, due to air pollution, rainwater, especially the initial rainwater, will contain ammonia nitrogen, nitrate ions, phosphate ions, etc. Municipal drainage is usually directly discharged into urban rivers, nitrogen and phosphorus elements in the river Some damage to the biological environment.

Utility model content

The purpose of the utility model is to provide a rainwater inlet trash screen for initial rainwater filtration, which can effectively avoid the clogging of municipal pipelines and can absorb nitrogen and phosphorus salts.

In order to achieve the above object, the utility model adopts the following technical solutions:

A rainwater inlet trash screen for initial rainwater filtration, comprising a rainwater inlet whose lower part communicates with municipal pipelines, a rainwater grate is arranged at the upper end of the rainwater inlet, and at least one filter layer is arranged under the rainwater grate. There is a nitrogen and phosphorus adsorption structure between the rainwater grate and the filter layer, which can effectively absorb nitrogen and phosphorus elements in the rainwater through the nitrogen and phosphorus adsorption structure, effectively reducing the pollution caused by the rainwater to the river; Filter out blockages such as silt, clay, etc.

Further, a deflector for guiding rainwater to the filter layer is provided under the rainwater grate, and effectively reduces turbulent flow.

Further, the end of the deflector is supported at the rainwater outlet, the middle part of the deflector is bent horizontally, and the nitrogen and phosphorus adsorption structure is arranged at the horizontal bend, because most rainwater passes through the ground from The periphery of the rainwater flows into the rainwater, and the nitrogen and phosphorus adsorption structure is specially set near the rainwater, so that the effect can achieve the maximum effect.

Further, the surface of the nitrogen and phosphorus adsorption structure is provided with through holes, and the interior is provided with fly ash and activated carbon or carbonized straw packed in textile bags.

Further, the filter layer includes two layers, the mesh diameter of the filter screen of the upper filter layer is larger than the mesh diameter of the lower filter layer, through the filtration of two or more filter layers, the rainwater entering the municipal pipeline is effectively guaranteed to be clean. degree, which is conducive to the protection of the environment.

Further, the upper part of the filter layer is fixedly connected with the deflector, and when the deflector is taken out, it is convenient to take out the filter layer at the same time to clean the filter layer.

Further, the filter layer is in the shape of a frame with an opening on the top, which ensures effective filtration of rainwater when the water flow is relatively large.

Further, the upper part of the filter layer is detachably fixed at the rainwater outlet.

Further, the nitrogen and phosphorus adsorption structure is a circular structure, which not only ensures effective adsorption of nitrogen and phosphorus, but also does not affect blockage.

Or, the filter layer is in the shape of a frame, with two layers of filter screens on the side walls and a filter screen at the bottom, the mesh diameter of the bottom filter screen is larger than the mesh diameter of the upper filter screen, and the mesh diameter of the lower filter screen is smaller than the mesh diameter of the upper filter screen.

The working principle of the utility model is as follows: a deflector and a filter layer are sequentially arranged under the rainwater grate, and the nitrogen and phosphorus elements in the rainwater are effectively adsorbed through the nitrogen and phosphorus adsorption structure, effectively reducing the pollution caused by the rainwater to the river; The second layer filters the larger blockages carried by the rainwater, such as silt, clay, etc.

The beneficial effects of the utility model are:

1) The nitrogen and phosphorus elements in the rainwater can be effectively adsorbed through the nitrogen and phosphorus adsorption structure, and the pollution caused by the rainwater to the river can be effectively reduced.

2) The larger blockages and smaller debris carried in the rainwater are filtered through the filter layer, which effectively avoids the blockage of municipal pipes caused by impurities.

3) Through the setting of the deflector, it is effectively ensured that the rainwater first passes through the filter layer and then flows into the municipal pipeline.

Description of drawings

Fig. 1 is the schematic diagram of gully device in the utility model;

Fig. 2 is the side view of part structure in the utility model;

Among them: 1. Rainwater outlet, 2. Lower filter, 3. Upper filter, 4. Deflector, 5. Rainwater grate, 6. Nitrogen and phosphorus adsorption structure, 7. Bottom filter.

detailed description

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

Example 1

As shown in Figure 1, a kind of rainwater intake trash screen used for initial rainwater filtration comprises a rainwater outlet 1 whose lower part communicates with municipal pipelines, and a rainwater grate 5 is arranged at the upper end of the rainwater inlet 1, and a rainwater grate 5 is arranged at the bottom of the rainwater grate 5. A layer of filter layer is arranged below, and a nitrogen and phosphorus adsorption structure 6 is arranged between the rainwater grate 5 and the filter layer, and the upper part of the filter layer is detachably fixed at the rainwater outlet 1.

The end of the deflector 4 is supported at the rainwater outlet 1, the middle of the deflector 4 is bent horizontally, and the nitrogen and phosphorus adsorption structure 6 is arranged at the horizontal bend, because most of the rainwater passes through the ground It flows into the rainwater outlet 1 from the periphery of the rainwater outlet, and the nitrogen and phosphorus adsorption structure 6 is specially arranged near the rainwater outlet 1, so that the effect can reach the maximum effect.

The surface of the nitrogen and phosphorus adsorption structure 6 is provided with through holes, and the interior is provided with fly ash and activated carbon or carbonized straw packed in textile bags.

Described filtering layer is one deck, and its shape is a frame, and the mesh diameter of the upper layer filter screen 3 of side is greater than the mesh diameter of lower floor filter layer 2, and the mesh diameter of bottom filter screen 7 is greater than upper layer filter screen 3 mesh diameters, effectively guarantees In order to ensure the cleanliness of the rainwater entering the municipal pipeline, it is beneficial to the protection of the environment. Specifically, the mesh of the upper filter 3 can be set to 2mm, the diameter of the lower filter 2 is 1mm, and the diameter of the bottom filter 7 is 5mm.

The nitrogen and phosphorus adsorption structure 6 is a ring-shaped structure, which not only ensures effective adsorption of nitrogen and phosphorus, but also does not affect blockage.

If the water level produced by the storm exceeds all the rainwater grates 5, it can flow into the municipal pipe network through the open opening. Rainwater also continues to flow through the other split grates as water flows directly out of the opening. Rainstorms of this intensity are rare and usually don't last long. After the rains ended, the rainwater was completely drained.

Example 2

The filter layer has three layers, which are the upper filter layer, the lower filter layer and the bottom filter layer in turn. Both the upper filter layer and the lower filter layer are frame-shaped, and the bottom filter layer is a filter net, and the mesh diameter of the bottom filter layer is the smallest.

Example 3

A deflector for guiding rainwater to the filter layer is provided below the rainwater grate.

The upper part of the filter layer is fixedly connected with the deflector 4, and when the deflector 4 is taken out, it is convenient to take out the filter layer at the same time, and clean the filter layer.

The above is only a preferred embodiment of the utility model, it should be pointed out that for those of ordinary skill in the art, without departing from the principle of the utility model, some improvements and modifications can also be made. Retouching should also be regarded as the scope of protection of the present utility model.

Claims (10)

1. A rainwater intake trash screen for initial stage rainwater filtration, is characterized in that, comprises a rainwater mouth that the bottom is communicated with the municipal pipeline, the upper end of the rainwater mouth is provided with a rainwater grate, below the rainwater grate is provided with at least A filter layer, with a nitrogen and phosphorus adsorption structure between the rainwater grate and the filter layer. 2 . The rainwater inlet trash screen according to claim 1 , wherein a deflector for guiding rainwater to the filter layer is provided below the rainwater grate. 3 . 3. The rainwater inlet trash screen according to claim 2, wherein the end of the deflector is supported at the rainwater outlet, the middle part of the deflector is bent horizontally, and the nitrogen and phosphorus adsorption The structure is located at the horizontal bend. 4. The rainwater inlet trash screen according to any one of claims 1-3, wherein the nitrogen and phosphorus adsorption structure surface is provided with through holes, and the inside is provided with fly ash contained in a textile bag. and activated carbon or carbonized straw. 5. The rainwater inlet trash screen as claimed in claim 4, wherein the filter layer comprises two layers, and the mesh diameter of the filter screen of the upper filter layer is greater than the mesh diameter of the lower filter layer. 6. The rainwater inlet trash screen according to claim 2 or 3, characterized in that, the upper part of the filter layer is fixedly connected with the deflector. 7. The rainwater inlet trash screen according to claim 1, 2 or 3, wherein the filter layer is in the shape of a frame with an opening on the top. 8. The trash screen of rainwater inlet according to claim 1, characterized in that, the upper part of the filter layer is detachably fixed at the rainwater inlet. 9. The rainwater intake trash screen according to claim 4, characterized in that, the nitrogen and phosphorus adsorption structure is an annular structure. 10. The rainwater intake trash screen as claimed in claim 1, wherein the filter layer is in the shape of a frame, the side wall has two layers of filter screens, the bottom has a filter screen, and the mesh diameter of the bottom filter screen is larger than that of the upper layer The mesh diameter of the filter mesh, the mesh diameter of the lower filter mesh is smaller than the mesh diameter of the upper filter mesh.