CN103774742B - A drainage pipe grille device - Google Patents

Abstract

The invention discloses a drainage pipeline grating device. The drainage pipeline grating device comprises a water body filtering area with a water inlet pipeline and a water outlet pipeline. A grating cylinder with the vertical axis is arranged in the water body filtering area. The grating cylinder is provided with a tangent inlet communicated with the water inlet pipeline and a grating net arranged on the peripheral wall of the grating cylinder. The grating cylinder serves as a filtering structure, and therefore the defect that impurities easily adhere to an existing straight-flow type filter screen is overcome; the tangent inlet is formed, a water body forms rotational flow in the grating cylinder, and therefore the water flow direction is parallel and tangent to the cylinder wall, the impurities can not adhere to screen holes of the cylinder wall, and the problems that the water filtering area is sharply narrowed due to impurity adhesion, flowing is not smooth, and water overflows out of the water inlet of the water inlet pipeline are solved.

Description

A drainage pipe grille device

technical field

The invention relates to an urban drainage system, in particular to a drainage pipe grid device.

Background technique

Suspended solids are one of the important pollutants in stormwater runoff, especially impurities such as leaves, fibers (hair, fabric), paper, etc. These suspended solids not only pose a serious threat to the water quality of the receiving water body, but on the other hand, these impurities The discharge of water has also caused a great negative impact on the landscape of the water body. Therefore, the effective removal and interception of suspended matter in the drainage pipe network before the rain and sewage are discharged into the river is of great significance to reduce water quality pollution and landscape damage of the receiving water body.

In developed countries, in order to solve the problem of initial rainwater pollution in split-system rainwater systems, a large number of initial rainwater pollution control technology researches have been carried out, and many forms of initial rainwater terminal treatment devices have been developed, such as Flogard, Hydro StormTrain series products, Stormfilter, Highland Tank' sSolids, etc. These devices can not only effectively remove large suspended particles such as leaves and fibers, but also have a good removal effect on small-sized suspended particles, so they have become the main means of drainage purification. However, when these technologies remove large suspended particles in rainwater, they mainly use mesh hanging baskets, mesh grilles, or purification principles such as filtration. All have good removal effects, but large suspended matter such as leaves and fibers accumulates on the hanging basket or grille, or the surface of the filter layer for a long time. blockage, which poses a great threat to drainage safety.

In order to solve the above problems, some researchers have proposed an anti-clogging filter device. The patent document with the notification number CN202430821U discloses a drainage well cleaning and filtering device. The drainage well cleaning and filtering device is mainly composed of a frame and a filter screen. The frame is grid-shaped and made into a cylindrical or square shape with a bottom and no cover, and the diameter of the cylindrical frame is slightly smaller than the inner diameter of the circular drainage well, and the height of the frame is smaller than the depth of the drainage well. The frame should be lower than the height of the drainage pipe in the drainage well, and the bottom and surroundings of the frame are equipped with filter screens, and the handle is hinged with a ring or pin shaft at the top of the frame.

And what publication number CN102127929A invented is a kind of rainwater well grid cleaning device that is used to prevent the downhole of rainwater well from clogging up, and this invention can effectively prevent grid cover plate from clogging when it rains, and protects urban environment sanitation.

Another invention with the publication number CN102691350A is a simple sliding grille anti-blocking gully, which mainly includes the gully body and the gully cover. This invention can quickly restore the gully blocked by debris and restore the water inlet capacity , realize rapid transmission of road rainwater, and reduce ground water accumulation during heavy rain.

However, the above-mentioned device either sets a filter screen under the well cover or directly filters the water body through the well cover. The water body is vertically impacted on the filter surface, and impurities are easy to enter the mesh of the filter screen and cause the filter screen to be blocked, resulting in a decline in the filtering effect of the filter screen. Or the filter screen needs to be cleaned frequently, which consumes manpower.

Contents of the invention

The invention discloses a drainage pipe grid device to solve the problems in the prior art that the filter screen is easily blocked and needs to be cleaned frequently.

A drainage pipe grille device, comprising a water body filtering area with a water inlet pipe and an outlet pipe, the water body filtering area is provided with a grid cylinder arranged vertically to the axis, and the grid cylinder has a tangential The entrance, and the grid nets set on the surrounding walls.

A pipe connected to the tangential inlet, part of the pipe wall is tangent to the wall of the grill cylinder, so that the water body entering the grill cylinder from the tangential inlet along the pipe is formed in the cylinder wall of the cylinder grill swirl.

When working, a small amount of sewage on the ground flows like the water inlet pipe of the above-mentioned device. The sewage with a small flow rate and more impurities enters the grille cylinder from the tangential inlet connected with the water inlet pipe, and the water flows along the wall of the cylinder to form a swirling flow. state, the flow direction is parallel and tangent to the wall of the grid cylinder, and the water body is filtered from the mesh of the grid cylinder to the water body filtration area.

The water flow forms a swirling flow, so that the impurities in the sewage are collected in the middle under the action of the rotating water flow, resulting in the effect of solid-liquid separation. In this way, not only the impurities larger than the mesh of the grid cylinder are removed, but the suspended particles smaller than the mesh are removed. can also be effectively removed.

At the same time, the impurity follows the flow direction of the water flow parallel to and tangent to the surface of the grille wall, and the impurity will not vertically impact the wall of the grille tube, so as to prevent the impurities from adhering to the mesh of the grille tube and blocking the mesh, ensuring that the grille tube normal filter capacity.

In order to make water flow into the grill cylinder horizontally, preferably, the water flow direction at the water outlet of the water inlet pipe is perpendicular to the axis of the grill cylinder.

In order to increase the filtering area, the sewage in the water inlet pipe enters the grill cylinder for filtration. Preferably, the water inlet pipe is connected to the middle of the grill cylinder.

In order to improve the swirl effect while ensuring the water inflow, preferably, the central angle of the tangential inlet relative to the axis of the grid cylinder is 70°-80°. If the angle is too small, the tangential inlet will be relatively narrow, and the water intake will be small, which is not conducive to drainage; The degree of swirl of the water flow decreases, and the filtering effect becomes poor.

In order to quickly discharge the water flow when the amount of sewage is large, preferably, the tangential inlet is connected to the water inlet pipe through a transition pipe arranged in the water body filtering area, and an overflow port is opened at the top of the transition pipe.

When the water flow in the water inlet pipe is large and the water level exceeds the height of the overflow port, the excess incoming water can overflow from the overflow port, directly enter the water body filtration area without passing through the grille tube, and discharge to the water outlet pipe to avoid the impact of large flow The impact of the cylinder wall can also ensure the drainage efficiency.

In order to make the present invention have a larger filtration capacity, preferably, the bottom edge of the overflow port is flush with the top edge of the water inlet pipe. Only when the water flow is too large, the sewage will directly enter the water filter area from the overflow.

In order to improve the sewage filtration capacity and filtration effect, preferably, two grill cylinders are provided, and the tangential inlets of the two are connected in parallel to the water inlet pipe.

In order to reduce the lateral area of the present invention, preferably, the transition ducts of the two grill cylinders are arranged side by side and abut against each other.

In order to facilitate the recovery and cleaning of impurities in the grill cylinder, preferably, a detachable netted debris basket is connected to the bottom of the grill cylinder. After the impurity finally gathers in the middle of the grill tube under the action of long-term swirling flow, it falls into the netted trash basket at the bottom of the grill tube, and the netted trash basket can be disassembled to remove and clean up the trash.

Preferably, the water inlet pipe and the water outlet pipe are arranged opposite to each other in the horizontal direction.

The beneficial effects of the present invention are:

The drainage pipe grid device of the present invention, by setting the filter structure as a grid tube, has changed the defect that the sundries of the original straight-line grid net are easy to adhere, and by setting a tangential inlet, the water body forms a swirl in the grid tube. flow, so that the direction of the water flow is parallel and tangent to the wall of the cylinder, so that impurities cannot adhere to the mesh of the cylinder wall, avoiding the sharp reduction of the filtration area caused by the adhesion of impurities, resulting in poor flow and overflowing of the water inlet of the water inlet pipe The problem. At the same time, by setting the overflow port in the present invention, the large flow of water can be directly discharged into the water body filtering area through the overflow port, without passing through the grille tube, so as to realize the safe discharge of the runoff peak flow and avoid damage to the wall of the grille tube. The hydraulic shock can improve the service life of the equipment.

Description of drawings

Fig. 1 is a schematic cross-sectional structure diagram of the present invention.

Fig. 2 is a schematic cross-sectional structure diagram of another angle of the present invention.

Detailed ways

As shown in Fig. 1 and Fig. 2, the drainage pipe grid device of this embodiment includes: a water body filtering area 3 with a water inlet pipe 1 and a water outlet pipe 2, and the water inlet pipe 1 and the water outlet pipe 2 are relatively arranged in the horizontal direction .

In the water body filtration area 3, there are two grid cylinders 4 arranged vertically with the same structure, each grid cylinder 4 has a tangential inlet 41 communicating with the water inlet pipe 1, and the two tangential inlets 41 are connected in parallel into the water inlet pipe. Each grid cylinder 4 is provided with a grid mesh on the surrounding wall, and the mesh holes are used to filter the liquid in the water body.

Each tangential inlet 41 communicates with the water inlet pipe 1 through a transition pipe 5 arranged in the water body filtering area. In order to reduce the lateral area of this embodiment, two transition pipes 5 are arranged side by side and abut each other.

In order to discharge the water quickly when the amount of sewage is large, an overflow port 51 is provided on the top of the transition pipe 5 , and the bottom edge of the overflow port 51 is flush with the top edge of the water inlet pipe 1 .

In order to make the water flow into the grid cylinder 4 horizontally, the water flow direction at the water outlet of the water inlet pipe 1 is perpendicular to the axis of the grid cylinder 1 . In order to increase the filtering area, the sewage in the water inlet pipe enters the grill cylinder 1 for filtration, and the water inlet pipe 1 is connected to the middle of the grill cylinder 4 .

While ensuring the water intake, in order to improve the swirl effect, the central angle of the tangential inlet 41 relative to the axis of the grid cylinder 4 is 70°-80°. When the angle is too small, the tangential inlet is relatively narrow, and the water intake is small, which is not conducive to drainage; The degree of swirl decreases and the filtering effect becomes worse. Therefore, in this embodiment, the central angle is 75 degrees.

A detachable mesh basket 6 is connected to the bottom of each grill cylinder 4 for collecting impurities filtered by the grill cylinder 4 . Impurities are finally concentrated in the middle of the grid tube 4 under the action of long-term swirling flow, and then fall into the netted debris basket 6 located at the bottom of the grid tube 4, and the netted debris basket 6 can be removed to remove the impurities and clean up.

The working process of this embodiment:

When the sewage flow rate is small, less than the maximum water level of the water inlet pipe 1, the sewage enters the grille cylinder 4 from the tangential inlet 41 connected with the water inlet pipe 1, and the water flows along the wall of the cylinder, forming a swirl along the direction indicated by the arrow. In the flow state, the flow direction is parallel and tangent to the wall of the grid cylinder 4, and the water body is filtered from the mesh of the grid cylinder to the water body filtration area 3 along the direction indicated by the arrow.

And when the sewage flow rate is larger than the maximum water level of the water inlet pipe, excess sewage can overflow from the overflow port 51, directly enter the water body filter area 3 without passing through the grille tube 4, and discharge to the water outlet pipe 2, so as to avoid the impact of large flow on the water body. The impact of the cylinder wall can also ensure the drainage efficiency.

The drainage pipe grid device of this embodiment, by setting the filter structure as the grid cylinder 4, has changed the shortcoming that the sundries of the original direct-flow filter screen are easy to adhere to, and by setting the tangential inlet 41, the water body is in the grid cylinder 4 A swirling flow is formed inside, so that the direction of the water flow is parallel and tangent to the wall of the cylinder, so that impurities cannot adhere to the mesh of the cylinder wall, which avoids the sharp reduction of the filtering area caused by the adhesion of impurities, resulting in poor flow and causing damage to the water inlet pipe. Water inlet overflow problem. At the same time, by setting the overflow port 51 in the present invention, the large-flow water flow can be directly discharged into the water body filtering area through the overflow port 51, without passing through the grille tube, so as to realize the safe discharge of runoff peak flow and avoid the impact on the grille tube 4 The hydraulic impact of the cylinder wall improves the service life of the equipment.

Claims (7)

1. a drainage pipe grid device, comprise the water body filtration district with inlet channel and outlet conduit, it is characterized in that, in described water body filtration district, be provided with the grid cylinder that axes normal is arranged, grid cylinder has the tangential inlet be communicated with inlet channel, and is arranged on the grid of perisporium; The central angle angle in described tangential inlet relative grid cylinder axle center is 70 degree ~ 80 degree; Described tangential inlet is communicated to inlet channel by the transition conduit be arranged in water body filtration district; Described grid cylinder is provided with two, both tangential inlet parallel connection access inlet channels; The transition conduit of described two grid cylinders is arranged side by side, and mutually reclines.

2. drainage pipe grid device as claimed in claim 1, it is characterized in that, the water (flow) direction of the water outlet of described inlet channel is mutually vertical with the axis of described grid cylinder.

3. drainage pipe grid device as claimed in claim 1, it is characterized in that, described inlet channel is communicated to the middle part of grid cylinder.

4. drainage pipe grid device as claimed in claim 1, it is characterized in that, the top of described transition conduit has overfall.

5. drainage pipe grid device as claimed in claim 4, is characterized in that, the end of described overfall flushes along with the edge, top of inlet channel.

6. drainage pipe grid device as claimed in claim 1, it is characterized in that, the bottom of described grid cylinder is connected with dismountable netted foreign material basket.

7. drainage pipe grid device as claimed in claim 1, it is characterized in that, described inlet channel and outlet conduit are oppositely arranged in the horizontal direction.