CN110761392A

CN110761392A - Desilting device and construction method for large-diameter sewage curve pipeline in operating state

Info

Publication number: CN110761392A
Application number: CN201910986663.8A
Authority: CN
Inventors: 王涛; 滕海渤; 熊菲; 羊军
Original assignee: Shanghai Foundation Engineering Group Co Ltd
Current assignee: Shanghai Foundation Engineering Group Co Ltd
Priority date: 2019-10-17
Filing date: 2019-10-17
Publication date: 2020-02-07

Abstract

The invention relates to a dredging device and a construction method of a large-caliber sewage curved pipeline in an operating state.A small unpowered ship of the device is provided with underwater dredging equipment, the underwater dredging equipment consists of a high-pressure slurry pump and a matched pipeline, one end of the matched pipeline is fixedly connected with a water gun, and the other end of the matched pipeline is provided with a water-absorbing horn mouth; two ends of the unpowered boat are respectively tied with a steel wire rope, and the steel wire ropes are provided with a buoy every 10 m; the two winches are respectively arranged on the land outside the well at two end wells of the dredging interval, and the winches operate to pull the steel wire rope, so that the movement of the upper and lower streams of the boat is realized. Sewage in the sewage pipeline passes through a high-pressure mud pump to form high-pressure water jet, and the high-pressure water jet is jetted out through a water gun, so that sludge in the pipeline is impacted at high pressure; the slushed sludge forms slurry which flows downstream along with the sewage. Compared with the conventional flow-cutting dredging scheme, the method has higher operability; the unpowered boat can solve the problems that automatic equipment of a long-distance sewage tunnel is difficult to enter and the faults are difficult to maintain.

Description

Desilting device and construction method for large-diameter sewage curve pipeline in operating state

Technical Field

The invention relates to a dredging device, in particular to a dredging device for a large-caliber sewage curved pipeline and a construction method.

Background

Most underground pipelines in large and medium-sized cities are built in the eighty-ninety years of the last century, and most pipelines are in a function decline stage along with the lapse of time, particularly underground sewage pipelines in cities. The urban underground sewage pipeline mainly circulates domestic sewage and production sewage, part of suspended matters are deposited at the bottom of the pipeline in the sewage flowing process, and a thick sludge layer is formed at the bottom of the pipeline along with the accumulation of time. The accumulation of the sludge layer can reduce the water flow passing area, thereby influencing the use function of the pipeline.

The conventional dredging method in the pipeline comprises the following steps: the regional pipe network stops operating, namely water is cut off in the pipeline, then water in the pipeline is extracted, and finally the water enters the pipeline manually and is desilted by adopting desilting equipment. However, once the sewage pipe network stops operating, the sewage pipe network brings about great troubles to the life of residents.

Therefore, it is necessary to study the dredging apparatus and construction method for sewage pipes in the operating state of the sewage pipe network.

Disclosure of Invention

The invention provides a dredging device and a construction method for a large-diameter sewage curved pipeline in an operating state, which are used for solving the problem of removing sludge at the bottom of an old pipeline in a non-stop flow state.

The technical scheme of the invention is as follows: a dredging device for a large-diameter sewage curve pipeline in an operating state comprises an unpowered boat, underwater dredging equipment and a winch, wherein the underwater dredging equipment is arranged on the unpowered boat and consists of a high-pressure mud pump and a matched pipeline, one end of the matched pipeline is fixedly connected with a water gun, and the other end of the matched pipeline is provided with a water suction bell mouth; two ends of the unpowered boat are respectively tied with a steel wire rope, and the steel wire ropes are provided with a buoy every 10 m; the two winches are respectively arranged on the land outside the well of the wells at the two ends of the dredging area, and the winches operate to pull the steel wire rope, so that the movement of the upper and lower streams of the boat is realized.

Furthermore, the unpowered boat is matched with underwater dredging equipment to clear away sludge accumulated in the original sewage pipeline under the driving of the winch.

A construction method of a dredging device adopting a large-caliber sewage curve pipeline in an operating state comprises the following steps:

1) starting the winch to operate to drive the steel wire rope to pull the unpowered boat to enable the unpowered boat to move in the counter-current direction;

2) placing a water-absorbing bell mouth of underwater dredging equipment arranged on an unpowered boat upstream, and placing a water gun downstream for flushing mud;

3) the unpowered boat runs along the direction of the reverse water flow under the traction of the steel wire rope, the high-pressure slurry pump is started, sewage is ejected at high pressure through the water gun after passing through the high-pressure slurry pump, sludge is dispersed, and the dispersed sludge forms slurry and flows downstream along with the sewage.

The invention has the beneficial effects that:

1. the unpowered boat can solve the problem that automatic equipment of a long-distance sewage tunnel is difficult to enter or the problem that the automatic equipment is difficult to maintain due to faults.

2. The system power is a winch, the speed can be adjusted, and the effective movement of the small ship in the pipeline can be ensured by adopting the traction of a steel wire rope, so that the effect and the efficiency of the erosion and deposition are ensured;

3. aiming at the condition that the pipe is full of water, the buoy horizontally positions the steel wire rope and prevents a measuring device platform; meanwhile, the buoy plays a role in positioning left and right aiming at the curved pipeline, so that the steel wire rope is positioned in the middle position in the curved pipeline, and the effectiveness of traction is ensured;

4. the device mainly is to the full water sewage pipe desilting of long distance, and the manual work is difficult to get into the pipeline, and automatic equipment is in case the problem that the maintenance is difficult to break down, carries out the research and development of pertinence. Can be repeatedly drawn to ensure the flushing effect.

5. The construction cost is low.

Therefore, the invention can solve the problem of removing the silt at the bottom of the old pipeline under the non-stop flow state.

Drawings

FIG. 1 is a schematic structural diagram of a dredging device system of a large-caliber sewage curved pipeline in an operating state;

FIG. 2 is a structural section view of a dredging device system of a large-caliber sewage curved pipeline in an operating state.

Detailed Description

The invention is further described with reference to the following figures and examples.

As shown in fig. 1 and 2, the dredging device for the large-caliber sewage curved pipeline in the operating state comprises a winch 1, a pulley 2, a steel wire rope 3, an underwater dredging device 4, a buoy 5 and an unpowered boat 9.

An underwater dredging device 4 is arranged on the unpowered boat 9, a steel wire rope 3 is respectively bolted at two ends of the unpowered boat 9, and buoys 5 are arranged on the steel wire rope 3 every 10 m. And two winches 1 are respectively arranged on the ground outside the well 6 at two end wells of the dredging interval, and the winches 1 operate to pull the steel wire ropes 3, so that the up-and-down stream movement of the small ship 9 is realized. The wire rope 3 leaving the pipe is arranged at the turning point on a pulley fixed on the wall or the mouth of the well. The unpowered boat 9 runs simultaneously with the high-pressure slurry pump in the moving process, sewage in the sewage pipeline passes through the high-pressure slurry pump to form high-pressure water jet, and the high-pressure water jet is jetted out through the water gun, so that the sludge in the original sewage pipeline 8 is impacted at a large pressure; the slushed sludge forms slurry which flows downstream along with the sewage.

The utility model provides a construction method of desilting device of heavy-calibre sewage curve pipeline under operation state, is applicable to former sewage pipeline and carries out the operating mode that desilts to the pipe bottom silt under the condition of not having a continuous flow, and its step is:

(1) the winch 1 operates to drive the steel wire rope 3, and the steel wire rope 3 pulls the boat 9 to enable the boat to move against the water flow direction;

(2) an underwater dredging device 4 is arranged on the unpowered boat 9, the upstream of the underwater dredging device 4 is a water suction port, and the downstream is a water gun for flushing mud. The boat advances against the water flow direction under the traction of the steel wire rope 3, the high-pressure water pump is started at the same time, and sewage is ejected at high pressure through the water gun after passing through the high-pressure water pump to disperse sludge.

Claims

1. The utility model provides a desilting device of heavy-calibre sewage curve pipeline under operation state, includes unpowered boat (9), underwater desilting equipment (4), hoist engine (1), its characterized in that: an underwater dredging device (4) is arranged on the unpowered boat (9), the underwater dredging device (4) consists of a high-pressure slurry pump and a matched pipeline, one end of the matched pipeline is fixedly connected with a water gun, and the other end of the matched pipeline is provided with a water suction bell mouth; two ends of the unpowered boat (9) are respectively tied with a steel wire rope (3), and the steel wire ropes (3) are provided with a buoy (5) every 10 m; the two winches (1) are respectively arranged on the land outside the well of the wells (6) at the two ends of the dredging area, and the winches (1) operate to pull the steel wire rope (3), so that the movement of the upper stream and the lower stream of the boat (9) is realized.

2. The dredging device for the large-caliber sewage curved pipeline in the operating state according to claim 1, characterized in that: the unpowered boat (9) is matched with the underwater dredging equipment (4) to clear away the sludge accumulated in the original sewage pipeline (8) under the driving of the winch (1).

3. A construction method of a dredging device adopting a large-caliber sewage curved pipeline in an operating state as claimed in claim 2 is characterized by comprising the following steps:

1) the winch (1) is started to operate to drive the steel wire rope (3) to pull the unpowered boat (9), so that the unpowered boat (9) moves against the water flow direction;

2) placing a water-absorbing bell mouth of the underwater dredging device (4) arranged on the unpowered boat (9) at the upstream, and placing a water gun at the downstream for flushing mud;

3) the unpowered boat (9) starts the high-pressure slurry pump while moving against the direction of water flow under the traction of the steel wire rope (3), sewage is ejected at high pressure through the water gun after passing through the high-pressure slurry pump, sludge is dispersed, and the dispersed sludge forms slurry and flows away along with the sewage downstream.