CN218540905U

CN218540905U - Rainwater inspection well with inlet end pipeline elevation lower than outlet end pipeline elevation

Info

Publication number: CN218540905U
Application number: CN202222465448.3U
Authority: CN
Inventors: 鲁先鹏; 钟利锋; 周扬
Original assignee: China Haisum Engineering Co Ltd
Current assignee: China Haisum Engineering Co Ltd
Priority date: 2022-09-16
Filing date: 2022-09-16
Publication date: 2023-02-28
Anticipated expiration: 2032-09-16

Abstract

The application discloses a rainwater inspection well with an inlet end pipeline elevation lower than an outlet end pipeline elevation, which is characterized by comprising a shaft, wherein a mud settling tank, a sand settling pump chamber and a well chamber are sequentially arranged in the shaft from bottom to top; a submersible sewage pump is arranged in the sand-settling pump chamber; the side wall of the shaft is provided with a water inlet and a water outlet, the water inlet and the water outlet are respectively arranged on two opposite sides of the shaft, the water outlet level is higher than that of the water inlet, and the bottom of the port of the water outlet is provided with a back water blocking prevention tooth; the discharge port of the submersible sewage pump is connected with a discharge pipe, the highest discharge pipe extends out of the shaft and is provided with a drainage branch pipe and a sewage discharge branch pipe, the drainage branch pipe is connected to a water outlet, the sewage discharge branch pipe is arranged outside the shaft, the drainage branch pipe is provided with a normally open drain valve, and the sewage discharge branch pipe is provided with a normally closed drain valve.

Description

Rainwater inspection well with inlet end pipeline elevation lower than outlet end pipeline elevation

Technical Field

The utility model relates to a rainwater inspection shaft that entrance point pipeline elevation is less than exit end pipeline elevation mainly is applicable to the outdoor rainwater drainage system in industry, civil construction district and the municipal works scope, belongs to outdoor water supply and drainage engineering technical field.

Background

A rainwater inspection well is one of the most commonly used drainage structures in the field of water supply and drainage engineering. Generally, a rainwater inspection well is a pipe network convergence junction which is connected with water conservancy facilities such as municipal main pipes, drainage pump stations, rivers and lakes and is used for industrial and civil building districts, municipal engineering underground rainwater drainage pipelines and the like, and is a workstation which is convenient for regularly inspecting, cleaning and dredging pipelines and preventing the pipelines from being blocked.

The conventional rainwater drainage inspection well is generally made of a concrete inspection well, a plastic inspection well and the like, and structurally comprises an inspection well main body, a well cover and a support. For example, the national standard drawing sets ' drainage inspection well ' 02S515, prefabricated reinforced concrete drainage inspection well ' 05SS521, concrete module drainage inspection well ' 05SS522, building district plastic drainage inspection well ' 08SS523 and the like, the device is mainly used for general gravity flow districts and municipal rainwater drainage pipeline systems.

In practical engineering, especially in rainwater pipeline system engineering where the connecting pipes are buried to a small depth and have small pipe diameters and old urban areas, the elevation of the inlet-end pipeline is lower than that of the outlet-end pipeline, and a conventional drainage inspection well is not suitable for such gravity flow drainage working conditions, so that the following problems exist:

1. because the inlet end pipeline elevation is lower than the outlet end pipeline elevation, rainwater in the catchment area can not be discharged from the conventional gravity flow rainwater inspection well, the additional arrangement of a rainwater lifting pump station needs to be considered, the land area with non-main functions is occupied, and the cost of engineering cost, operation energy consumption, equipment maintenance and the like is increased.

2. Because of entrance end pipeline elevation is less than exit end pipeline elevation, conventional gravity flow rainwater inspection shaft can't in time drain, leads to inspection shaft and pipeline after rainwater discharges a period of time will siltation silt, floater etc. has reduced the drainage ability of later stage rainwater system.

3. In actual engineering, because the water level of the connection port is high, the depth of pipeline burial needs to be reduced, the inspection well at the farthest point cannot meet the requirement of bearing ground load, and uneconomical reinforcement measures such as plain concrete wrapping and the like need to be adopted for local pipelines.

4. In a larger outdoor rainwater drainage system, the buried depth of the whole rainwater pipe network is increased due to local depressions, the engineering excavation amount is increased, and the buried depth and the soil covering load of the tail end of the pipe network system are increased.

SUMMERY OF THE UTILITY MODEL

The application aims to solve the technical problem of how to avoid siltation caused by long-time water accumulation in a pipe network after rain; when local depression is met, the problems of reducing the buried depth of the whole pipe network and the like are avoided.

In order to solve the technical problem, the technical scheme of the application is to provide the rainwater inspection well with the elevation of the inlet end pipeline lower than that of the outlet end pipeline, and the rainwater inspection well is characterized by comprising a shaft, wherein a mud settling tank, a sand settling pump chamber and a well chamber are sequentially arranged in the shaft from bottom to top; a submersible sewage pump is arranged in the sand settling pump chamber; the side wall of the shaft is provided with a water inlet and a water outlet, the water inlet and the water outlet are respectively arranged on two opposite sides of the shaft, the height of the water outlet is higher than that of the water inlet, and the bottom of the port of the water outlet is provided with a back blocking prevention tooth; the drainage branch pipe is connected to the water outlet, the blowdown branch pipe is arranged outside the well barrel, a normally open drain valve is arranged on the drainage branch pipe, and a normally closed blowdown valve is arranged on the blowdown branch pipe.

Preferably, a shaft expansion unit for increasing the total height of the shaft is connected to the well chamber.

Preferably, the top of the shaft is provided with a square cast iron cover seat, and a hollow grid anti-falling well cover is arranged in the square cast iron cover seat.

Preferably, the inner wall of the shaft is provided with a ductile cast iron ladder.

The method has the advantages that upstream rainwater enters the shaft through the water inlet, rainwater is accumulated in the shaft, upper clear water is discharged from the water outlet, the elevation of the water outlet is larger than that of the water inlet, the discharged water is discharged to a downstream municipal rainwater connection pipeline or a natural water body from the water outlet by utilizing self gravity, sludge is accumulated in the shaft, sewage with low silt content is directly discharged to the water outlet through the submersible sewage pump after rain, and the sewage with high silt content is pumped and discharged to the outside of the shaft for treatment; the rainwater inspection well structure that this application adopted, when meetting local hollow ground, owing to raised the delivery port elevation, can avoid reducing the buried depth of whole pipe network. The construction method and the construction system reduce engineering equipment and civil engineering cost, are safe and reliable in operation, reduce maintenance times, reduce engineering excavation amount and pipeline local reinforcement measures, and have the advantages of being convenient and fast to install, short in construction period and the like.

Drawings

FIG. 1 is a schematic top view of a rainwater manhole provided in an embodiment;

FIG. 2 is a front sectional view of a rainwater manhole provided in an embodiment;

fig. 3 is a side sectional view of a rainwater manhole provided in an embodiment.

Detailed Description

In order to make the present application more comprehensible, preferred embodiments are described in detail below with reference to the accompanying drawings.

Examples

The embodiment provides a rainwater inspection well with an inlet end pipeline elevation lower than an outlet end pipeline elevation, which comprises a shaft, wherein a mud settling tank 1, a sand settling pump chamber 2, a well chamber 3 and a shaft expansion unit 4 are sequentially arranged in the shaft from bottom to top, and the shaft expansion unit 4 is used for increasing the height of the shaft and adaptively adjusting the total height of the shaft so as to adapt to different positions; the inner wall of the shaft is provided with a ladder stand 9, the ladder stand 9 is made of nodular cast iron, a submersible sewage pump 5 with the function of draining accumulated water and silt is arranged in the shaft, and the submersible sewage pump 5 is positioned in the desilting pump chamber 2 and the desilting tank 1.

A square cast iron cover seat is arranged at the top of the upper section of the shaft, a finished hollow-out grid anti-falling partition plate 10 is arranged in the square cast iron cover seat, and a square cast iron well cover plate 11 is arranged above the square cast iron cover seat; the side wall of the shaft is provided with a water inlet 6 and a water outlet 7, the water inlet 6 and the water outlet 7 are respectively positioned at two opposite sides of the shaft, the water outlet 7 is higher than the water inlet 6, and the bottom of the port of the water outlet 7 is provided with a back-blocking preventing tooth 12 to prevent water from returning after flowing out of the water outlet 7.

A discharge port of the submersible sewage pump 5 is connected with a discharge pipe 8, the highest discharge pipe 8 extends out of a shaft and is provided with a drainage branch pipe 81 and a sewage discharge branch pipe 82, the drainage branch pipe 81 is connected to a water outlet 7, an outlet of the drainage branch pipe 81 is arranged in the water outlet 7, the sewage discharge branch pipe 82 is arranged outside the shaft, and sewage is directly discharged outside the shaft; a normally open drain valve 811 is arranged on the drain branch pipe 81, and a normally closed drain valve 822 is arranged on the drain branch pipe 82.

Rainwater collected by plots in the municipal drainage system is drained to a shaft through an upstream rainwater drainage pipeline and a water inlet 6, when the water surface in the shaft rises above an anti-blocking tooth 12, the rainwater is drained to a municipal rainwater connection pipeline or a natural water body for underground inspection through a water outlet 7, the water outlet 7 is higher than the water inlet 6, sludge in the rainwater is accumulated in the shaft, a submersible sewage pump 5 in a desilting pump chamber 2 is started to pump the residual rainwater in the shaft after rain, the rainwater is continuously drained to the water outlet 7 through a drainage branch pipe 81, a drainage valve 811 is kept open at the moment, and a drainage valve 822 is kept closed; after the sedimentation time of one to two days, the accumulated water in the shaft is precipitated to become sewage with higher silt content, at the moment, if the accumulated water is continuously discharged to a downstream municipal rainwater connecting pipeline or a natural water body, the deposition is easy to cause inconvenience, so after the sedimentation time of one to two days, the submersible sewage pump 5 continuously pumps and discharges the sewage, the drain valve 811 is closed, the drain valve 822 is opened, the sewage is pumped and discharged to the ground, and the burying treatment is carried out.

To sum up, the difference of the rainwater inspection well that inlet end pipeline elevation is less than outlet end pipeline elevation that this embodiment provided with and conventional inspection well lies in:

1) When the inlet end pipeline elevation is lower than the outlet end pipeline elevation, rainwater in the catchment area can be drained by using the positive pressure difference between the ground and the drainage water level without arranging a lifting pump station.

2) The submerged pump that starts in the sediment pump chamber behind the rain gets rid of the surplus rainwater in the rainwater pipeline, when needing to get rid of the silt in the silt trap in the well, closes normally open drain valve and opens normally closed mud valve and arrange the mud to avoid long-time ponding in the pipe network to cause the siltation, increase rainwater pipe network life, guarantee that on-the-spot rainwater discharges in time, reduced clear maintenance cost of leading to.

3) Avoid reducing the buried depth of whole pipe network when meetting local hollow ground, make whole rainwater drainage system nimble convenient, avoid the pipeline buried depth to receive elevation and earthing thickness to influence, reduce excavation earthwork volume, reduce engineering cost.

4) The top of the upper section of the shaft is provided with the square cast iron cover seat, so that the load bearing capacity of the well body is increased, and the influence of load requirements is avoided, so that the use scene is enlarged.

5) A finished hollow grid is adopted in the upper section of the shaft to prevent the falling of the well lid and the nodular cast iron ladder stand, so that the safety requirement is met.

Specifically, in the process of manufacturing the finished inspection well, the material models of all components of the finished inspection well are selected according to the design paper of a drainage pipe network and the material models of drainage pipes selected from the design paper; according to parameters such as the diameter, the elevation and the quantity of water inlet and outlet pipes of each inspection well, pipeline buried depth and soil covering load and the like, calculating and selecting components such as the diameter and the wall thickness of a well chamber of each inspection well, the wall thickness of a shaft, the length of the upper section of the shaft, the well cover, a support and the like through a mechanical structure, completing the connection of a water inlet and a water outlet with the well chamber, the connection of the well chamber with a sand settling pump chamber, the connection of a step with the well chamber of the shaft, the connection of a shaft expansion unit and the upper and lower sections of the shaft, the connection of the well cover and the support with the upper section of the shaft, the installation of a rainwater lifting pump in the sand settling pump chamber and the like in a finished product factory; the connection work of all parts can be completed in a finished product factory, and other mud discharge pipelines such as a rainwater lift pump, a switching valve and the like, hollow grid anti-falling manhole covers and the like are assembled and installed on site, and finally the rainwater inspection well with the inlet end pipeline elevation lower than the outlet end pipeline elevation is formed.

The technical scheme provided by the utility model is that when the municipal inlet end pipeline elevation is lower than the outlet end pipeline elevation, how to eliminate the rainwater in the catchment area by using the positive pressure difference between the ground and the drainage water level without arranging a lifting pump station, and the long-time water accumulation in the pipe network is avoided to cause siltation after rain; when meeting local depression, the buried depth of the whole pipe network is prevented from being reduced. The operation is safe and reliable, and has the advantages of convenient and fast installation, short construction period and the like.

It should be understood that the terms of orientation, up, down, left, right, front, back, top, bottom, etc., referred to or which may be referred to in this specification are defined relative to the configuration shown in the drawings, and are relative terms, such that the terms may be changed accordingly depending on the position and the state of use. Therefore, these and other directional terms should not be construed as limiting terms.

The foregoing is illustrative of the preferred embodiment of the present invention, and is not to be construed as limiting the invention in any way or in any way, and it will be understood by those skilled in the art that various modifications can be made without departing from the scope of the invention. Those skilled in the art can make various changes, modifications and evolutions equivalent to those made by the above disclosed technical content without departing from the spirit and scope of the present invention, and all such changes and modifications are equivalent embodiments of the present invention; meanwhile, any changes, modifications and evolutions of equivalent changes to the above embodiments according to the actual technology of the present invention are also within the scope of the technical solution of the present invention.

Claims

1. A rainwater inspection well with an inlet end pipeline elevation lower than an outlet end pipeline elevation is characterized by comprising a shaft, wherein a mud settling tank, a sand settling pump chamber and a well chamber are sequentially arranged in the shaft from bottom to top; a submersible sewage pump is arranged at the bottom of the shaft; the side wall of the shaft is provided with a water inlet and a water outlet, the water inlet and the water outlet are respectively arranged on two opposite sides of the shaft, the height of the water outlet is higher than that of the water inlet, and the bottom of the port of the water outlet is provided with a back blocking prevention tooth; the drainage branch pipe is connected to the water outlet, the blowdown branch pipe is arranged outside the well barrel, a normally open drain valve is arranged on the drainage branch pipe, and a normally closed blowdown valve is arranged on the blowdown branch pipe.

2. A rainwater manhole according to claim 1, wherein the height of the inlet end pipe is lower than that of the outlet end pipe, and the chamber is connected with a shaft extension unit for increasing the total height of the shaft.

3. The rainwater manhole shaft with the inlet end pipeline elevation lower than the outlet end pipeline elevation as claimed in claim 1, wherein a square cast iron cover seat is arranged at the top of the shaft, and a hollow grid anti-falling manhole cover is arranged in the square cast iron cover seat.

4. The rainwater manhole of claim 1, wherein the inner wall of the shaft is provided with a ladder made of ductile iron.