CN107434301A - A Vegetation Filter Ditch - Google Patents

Abstract

The invention discloses a vegetation filtering groove, which comprises a groove main body, the groove main body is composed of a water collection area and a drainage area connected to each other; a vegetation planting area is erected on the top of the water collection area, and the vegetation planting area Below is the water purification area, the upper surface of the water purification area is equipped with a plurality of siphon pipes, the siphon pipes are connected with the drainage pipe, and the outlet of the drainage pipe extends into the drainage area; the top of the drainage area is provided with a cover plate. The vegetation filtering groove of the present invention is connected by a multi-layer structure to remove non-point source pollution. On the one hand, the siphon pipe installed on the upper surface of the water purification filter material can improve the drainage effect of the groove when the water volume increases sharply during the heavy rain period, and then improve the drainage of the groove. On the other hand, the suction force of siphon can also be used to remove and purify the sludge on the surface of the filter material, so as to achieve the effect of self-cleaning and improve the filtration capacity of the filter material.

Description

A Vegetation Filter Ditch

technical field

The invention relates to a vegetation filtering ditch, which belongs to the technical field of rain and sewage diversion.

Background technique

At present, in response to the increasingly serious problem of water pollution, there are more and more treatment facilities and requirements for river sewage purification and rainwater collection. While focusing on flood control, keep up with the pace of the times, combine ecological engineering and green landscape layout needs, beautify the urban environment, build modern rivers, and form small riverside landscape belts along the rivers to create a comfortable new environment. The existing vegetation filtering trench has only one cavity, and the bottom of the cavity is connected with a drainage pipe. The rainwater in the vegetation filtering trench is filtered by the filter material and then drained directly through the drain at the bottom of the cavity. As the filtration time increases, the filter material A lot of silt will be deposited in the tank, which will lead to a decrease in its filtration performance. In addition, when the rainfall is heavy, a large amount of water will accumulate in the filter layer and it will not be filtered in time, and the drainage will not be timely.

Contents of the invention

Purpose of the invention: The technical problem to be solved by the present invention is to provide a new type of vegetation filtering groove, which is provided with two independent cavities, and is also equipped with a siphon device, which can self-clean the filter material on the filter material in time. The silt can effectively improve the efficiency of the purification and drainage of the device, and there will be no problem of water accumulation leading to untimely drainage when the rainfall is heavy.

In order to solve the problems of the technologies described above, the technical solution adopted in the present invention is:

A vegetation filtering ditch, comprising a ditch main body, the ditch main body is composed of a water collection area and a drainage area connected to each other; a vegetation planting area is erected on the top of the water collection area, and a water purification area is located below the vegetation planting area. Area, the upper surface of the water purification area is equipped with a plurality of siphon pipes, the siphon pipes are connected to the drain pipe, and the outlet of the drain pipe extends into the drainage area; the top of the drainage area is provided with a cover plate.

Wherein, a spacer is provided between the water collection area and the drainage area, and a water outlet is provided at the bottom of the spacer, and the water collection area and the drainage area are connected through the water outlet.

Wherein, the purification filter material in the water purification area is composed of 20% pebbles, 50% crushed stones, 15% acid-modified attapulgite and 15% coral sand.

Wherein, the outlet of the drainage pipe is covered with an intercepting net cover.

Wherein, the arrangement of the purification filter material in the water purification area is as follows: longitudinally, there are cobblestone layer, gravel layer, acid-modified attapulgite layer and coral sand layer. Cobblestone is relatively smooth, and the silt covered with it is easily sucked out by the siphon when it is placed on the top layer. Large-grained gravel is placed in the middle of the water purification area to prevent small-grained acid-modified attapulgite and coral sand from floating up under the action of water flow. .

Wherein, the intercepting mesh cover is a double-layer steel wire mesh filled with cotton gauze.

Compared with the prior art, the beneficial effects of the technical solution of the present invention are:

The vegetation filtering groove of the present invention is connected by a multi-layer structure to remove non-point source pollution. On the one hand, the siphon pipe installed on the upper surface of the water purification filter material can improve the drainage effect of the groove, and then improve the stability of the drainage of the groove; on the other hand, it can also The suction force of the siphon can be used to remove and purify the sludge on the surface of the filter material, so as to achieve the effect of self-cleaning and improve the filtration capacity of the filter material.

Description of drawings

Fig. 1 is a structural schematic diagram of a vegetation filtering ditch of the present invention.

Fig. 2 is a schematic diagram of the structure of the water purification zone of the present invention.

detailed description

The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings, but the scope of protection claimed by the present invention is not limited thereto.

As shown in Figure 1, the vegetation filtration trench of the present invention comprises a trench body 10 made of concrete, and the trench body 10 is made up of interconnected catchment areas 1 and drainage areas 2; the top of the catchment area 1 is erected Vegetation planting area 3, the water purification area 4 is below the vegetation planting area 3, and the water quality purification area 4 is located in the catchment area 1, and the purification filter material of the water quality purification area 4 is made of 20% pebbles, 50% crushed Stone, 15% acid-modified attapulgite and 15% coral sand 14. There are multiple siphons 5 installed on the upper surface of the water purification area 4. The siphons 5 are inserted into the upper surface of the purification filter material. The siphons 5 pass through the dry pipe and the drain pipe. 6 is connected, the outlet of the drain pipe 6 extends into the drainage area 2, the height of the outlet of the drain pipe 6 is lower than the height of the inlet of the siphon pipe 5, and the outlet of the drain pipe 6 is covered with an intercepting net cover 8, and the intercepting net cover 8 is filled with cotton yarn Cloth double-layer steel wire mesh, the intercepting net cover 8 is buckled on the outlet of the drain pipe 6; the top of the drainage area 2 is provided with a cover plate 9, and an iron ring is embedded on the cover plate 9 to facilitate the opening and closing of the cover plate 9; the catchment area 1 A spacer 11 is provided between the drainage area 2 and a water outlet 7 is provided at the bottom of the spacer 11 . The water collection area 1 and the drainage area 2 communicate with each other through the water outlet 7 . The siphon tube 5 provided in the vegetation filtering groove of the present invention can timely remove the silt that blocks the purification filter material, thereby ensuring the long-term efficient operation of the purification filter material, timely collecting and processing initial rainwater, and achieving the effect of controlling non-point source pollution.

As shown in Figure 2, the purification filter materials in the water purification zone 4 are cobblestone layer 12, gravel layer 13, acid modified attapulgite layer 14 and coral sand layer 15 in the longitudinal direction, and the purification filter materials are arranged in order of particle size. The cobblestone is relatively smooth, and the silt covered by the uppermost layer is easily sucked out by the siphon 5, and the large-grained gravel is placed in the middle of the water purification zone 4 to prevent the acid-modified attapulgite and coral sand with small particles from being affected by the water flow. The effect is floating, and according to such sorting, the filtering effect of the water purification zone 4 can be guaranteed, and the system stability can be improved.

The vegetation filtering groove of the present invention is installed at the position of the river embankment, plays the role of protection belt for high water revetment and embankment, and ensures the stability of water quality purification treatment. The vegetation filtering groove of the present invention removes non-point source pollution through a multi-layer structure connection. The present invention uses a water purification filter material to filter, and the installed siphon pipe 5 can improve the drainage effect of the groove when the water volume increases sharply during the rainstorm period, and improve The stability of the system; on the other hand, the suction of the siphon can also be used to remove and purify the sludge on the surface of the filter material to achieve the effect of self-cleaning and improve the filtering capacity of the filter material; the cover plate 9 on the drainage area 2 is in a closed state when it is working. When the day is sunny, cover plate 9 is opened, and the intercepting net cover 8 of drainpipe 6 outlets is taken out, the gauze with sludge in the intercepting net cover 8 is taken out, and new yarn is arranged in the double-layer barbed wire to get final product.

When the rainfall is not heavy, the rainwater falls into the catchment area 1 through the vegetation planting area 3, and after being purified and filtered by the water purification area 4, it enters the drainage area 2 from the water outlet 7, and the drainage area 2 directly discharges the treated purified water When entering the river, as long as the water in the drainage area 2 submerges the outlet of the drainage pipe 6, because the water in the drainage area 2 is flowing, the pressure decreases, and at this time, the siphon 5 will produce a siphon phenomenon, which can be quickly discharged after the siphon is generated. Remove the accumulated water in catchment area 1, on the one hand, it can take away the silt on the surface of the purified filter material; when the rainfall is large (rainwater in catchment area 1 is discharged into drainage area 2 through siphon 5 and water outlet 7 at the same time) , the rainwater enters the catchment area 1, and the rainwater is discharged into the drainage area 2 through the siphon effect of the siphon pipe 5, and the sludge in the rainwater filtered by the unpurified filter material can be intercepted by the intercepting net cover 8 at the outlet of the drainage pipe 6, The rainwater purified and filtered by the water purification area 4 enters the drainage area 2 from the water outlet 7, and when the accumulated rainfall in the water collection area 1 is lower than the water level of the siphon effect (while the water volume in the drainage area 2 is also lower than the outlet of the drainage pipe 6 When), the rainwater purified and filtered by the water purification area 4 enters the drainage area 2 through the water outlet 7, and the drainage area 2 directly discharges the purified water into the river.

In the existing U-shaped or concave-shaped trench, the water purification area and the drainage area are located in the same cavity. When the rainstorm comes and the amount of rainwater increases sharply, the rainwater will be deposited in the water purification area due to the insufficient drainage capacity of the trench drainage pipe. It cannot be discharged in time, so that the purification area loses the purification effect; the groove of the present invention sets the groove body 10 into a "mountain" shape, separates the water purification area from the drainage area, and can improve the working efficiency of the device while increasing the space. It plays a buffer role when the water volume increases sharply in heavy rain and stormy weather, and enhances the water storage capacity of the device. Extending the vegetation planting area 3 into the groove can prevent vegetation from being washed away when the water volume is too large.

Apparently, the above-mentioned embodiments are only examples for clearly illustrating the present invention, rather than limiting the implementation of the present invention. For those of ordinary skill in the art, other changes or changes in different forms can be made on the basis of the above description. It is not necessary and impossible to exhaustively list all the implementation manners here. And these obvious changes or modifications derived from the spirit of the present invention are still within the protection scope of the present invention.

Claims (6)

1. A vegetation filter ditch, characterized in that: it comprises a ditch main body, and the ditch main body is made up of interconnected catchment areas and drainage areas; the top of the catchment area is set up with a vegetation planting area, and the vegetation Below the planting area is a water purification area. A plurality of siphon pipes are installed on the upper surface of the water purification area. 2. The vegetation filtering trench according to claim 1, characterized in that: a spacer is provided between the water collection area and the drainage area, a water outlet is provided at the bottom of the spacer, and the water collection area and the drainage area pass through the water outlet connected. 3. The vegetation filtering trench according to claim 1, characterized in that: the purification filter material in the water purification zone is made of 20% pebbles, 50% crushed stones, and 15% acid modified Attapulgite and 15% coral sand. 4. The vegetation filtering trench according to claim 1, characterized in that: the outlet of the drainage pipe is sleeved with an intercepting net cover. 5. The vegetation filtering trench according to claim 3, characterized in that: the arrangement of the purification filter material in the water purification area is as follows: a cobblestone layer, a crushed stone layer, and acid-modified attapulgite in the longitudinal direction. layers and coral sand layers. 6. The vegetation filtering ditch according to claim 4, characterized in that: the intercepting mesh cover is a double-layer steel wire mesh filled with cotton gauze.