RU2278927C1 - Device for water body bed cleaning - Google Patents

Abstract

FIELD: ground excavation, loosening or shifting equipment, particularly to lift silt or bottom sediments.

SUBSTANCE: device comprises receiving pipeline combined with bunker. Receiving pipeline outlet is connected to pressure pipeline through filtering members. Device additionally has discharge pipeline. Bunker is divided into collection sections. Collection sections and pressure pipeline outlets are connected to discharge pipeline through gate valves. Filtering member block includes coarse and fine filters. Filtering member is made as perforated pipe with coaxial auger installed in the pipe. Perforated pipe inlet faces water flow, outlet thereof is connected to silt collector.

EFFECT: reduced power inputs for water body bed cleaning.

6 cl, 4 dwg

Description

The invention relates to a device for excavation, loosening or moving soil and is used for lifting sludge and bottom sediments.

A known lake installation for the development of silty soils (patent SU 1797640), including a body mounted on a floating base with a sludge receiver at the lower end, a mechanism for loading sludge into transport tanks. At the same time, in order to reduce energy consumption, increase reliability and ensure natural moisture of the sludge, the casing is made in the form of an open shaft with a free sludge level, the loading mechanism is made in the form of a pump.

A device for the extraction of sapropel (patent RU 2193627) is known, comprising a craft adapted for processing sapropel, a winch with a traction body, a receiving device for gripping sapropel in the form of an inverted box of a U-shaped cross section, equipped with pontoons of variable buoyancy fixed to its cover and a suction branch pipe, flexible sleeve between the ship and the box, soil pump with electric motor. The ground pump is mounted on the lid of the box, and its discharge pipe is connected to a flexible sleeve, the electric motor is placed in a sealed capsule connected by a pipe to the surface zone with the possibility of placing the power cable and motor control and the hose for compressed air in the pipe cavity, while the kinematic connection of the electric motor with the soil pump was carried out through the transmission shaft with the stuffing box in the lid of the sealed capsule.

A disadvantage of the known inventions is that all bottom sediments, including stones, sand, water, are in the storage tank and transported in it, while to clean the bottom it is enough to collect suspensions, silt, bottom sediments, etc.

A known installation for transportation from the bottom of a reservoir of pulp (patent RU 2039162), including discharge and receiving pipelines and a working chamber. At the same time, it is equipped with a receiving tank divided by filtering elements into at least two compartments, in one of which there is an inlet of the pumping system of water purified in the filtering elements, and in the other, an outlet of the inlet pipe, and the working chamber is located above the water level in the reservoir. The installation is equipped with a valve at the inlet of the discharge pipe located at the bottom of the reservoir and a valve at the outlet of the intake pipe.

The disadvantage of this installation is the increased energy consumption for lifting the entire intake mass to the surface of the reservoir. In addition, the filtration of the entire incoming mass does not allow you to effectively purify water from sludge and suspended matter and significantly increases energy consumption during operation of the installation.

A known installation for lifting ore from the bottom of reservoirs (patent GB 1545867), selected as a prototype, including a receiving and discharge pipelines, a block of filtering elements, while the receiving pipe is combined with a hopper, and the outlet of the receiving pipe is connected through a block of filtering elements to the discharge pipe, which ensures a reduction in energy consumption by eliminating the rise of the entire suction mass to the surface of the reservoir. Each block, consisting of a receiving pipe and filter elements, collects ore with a given particle size.

The disadvantage of this design is that it does not allow it to be used to clean the bottom of a reservoir from silty sediments, characterized by small particle sizes. In addition, the installation does not provide for the discharge of sorted ore fractions without their rise to the surface, which leads to excessive energy consumption when using the installation for cleaning a reservoir.

The aim of the invention is to reduce energy consumption when cleaning the bottom of reservoirs from silty sediments and other bottom sediments.

The specified technical result is achieved by the fact that the device for cleaning the bottom of reservoirs, including a receiving pipe, combined with a hopper, while the output of the receiving pipe is connected through a block of filter elements with a discharge pipe. The device further comprises a discharge pipe. The hopper is divided into storage sections, while the storage sections and the outlet of the discharge pipe are connected via valves to the discharge pipe. The block of filter elements consists of coarse and fine filters. The filter element is made in the form of a perforated pipe with a coaxial screw installed inside, with the inlet of the perforated pipe facing the water flow and the outlet connected to the sludge collector. The outputs of the filter elements of the coarse filter are connected to the sludge collector through a centrifuge. At the input of the block of filtering elements, grinders with a mesh are additionally installed. The receiving pipe has a moving part with a variable length. The device is mounted on a wheeled or tracked chassis.

Description of drawings

Figure 1 - Device for cleaning the bottom of a reservoir.

Figure 2 - Filter element.

Figure 3 - Perforated pipe.

Figure 4 - Input block filter elements.

The device (Fig. 1) includes a receiving pipe 1 with a hopper 2 divided into storage sections 3. The output of the receiving pipe 1 is connected through a block 4 of filter elements 5 to a discharge pipe 6. The storage sections 3 and the discharge pipe 6 are connected through valves 7, 8 s discharge pipe 9. The block 4 of the filter elements consists of coarse filters 10 and fine filters 11. The filter element 12 (figure 2) is made in the form of a perforated pipe 13 with holes (shown in figure 3) with a coaxial screw 14 installed inside, and this input ends of perforated pipes 29 are turned to the flow of water and fixed in septum cells 31 and outlet ends 32 are connected with ilosbornikom 15 through the chute 24 and the centrifuge 16.

The receiving pipe 1 has a moving part 19 with a variable length and is equipped with a valve 20. The electric motor 21 is connected to the impeller 22 installed at the outlet of the discharge pipe 6.

The discharge pipe 9 has a movable part 25, which can be rotated away from the device.

At the inlet openings 26 in front of the filter element block 4 (FIG. 4), choppers 17 with a grid 18 are additionally installed. Each chopper 17 is connected by a shaft 23 to an electric motor 30.

The dimensions of the device are selected so that it is suitable for transportation to a reservoir, for this it can be equipped with a wheeled 27 or tracked 28 chassis.

The device operates as follows.

The electric motor 21 drives the impeller 22 at the outlet of the discharge pipe 6, which creates traction in the pipelines of the device. Soil with sludge, bottom sediments is absorbed through the movable part 19 of the receiving pipe 1.

Further, the water flow with inclusions enters the hopper 2 with accumulation sections 3. The hopper 2 with accumulation sections 3 has a significantly larger volume and flow area than the receiving pipe 1. Therefore, the flow rate in the hopper 1 decreases to a value at which effective separation occurs particles in the storage sections 3. In sections 3, located closer to the inlet of the receiving pipe 1, inclusions with a large specific gravity settle. Sludge deposits with a small specific gravity are sucked into the block 4 of filter elements.

After the grinders 17, the mass and suspensions arrive at the input ends 29 of the filter elements 5 of the rough filter 10. The choppers 17 are driven by a shaft 23 connected to an electric motor 30.

The screw 14 collects the mass that has not passed through the holes 13 in the wall of the filter element 12 at the output ends 32 connected to the centrifuge 16 using an inclined trough 26. The centrifuge 16 is designed to remove excess moisture from the incoming mixture. The screw 14 can be made with a variable pitch decreasing towards the output end 32 to effectively push the mass remaining in the filter element.

Water from the filter elements of the coarse filter 10 enters the fine filter 11 with screws 14, the filter elements of which have a smaller hole size. Particles of sludge and suspended matter are collected in a sludge collector 15. Filtered water enters the discharge pipe 6.

For unloading the collected stones, gravel, sand collected in various sections 3 of the hopper, 2 valves are provided 7. During unloading of the selected section into the discharge pipe 9, when the valve is opened 8, the flow of water from the impeller 22 leaches the soil components through the movable part 25 of the discharge pipe 9 The movable part 25 can be rotated so as to eject the soil away from the device or behind when attaching an additional section.

With the translational movement of the device, the movable part 19 of the receiving pipe 1 through the drive from the electric motor or from the chassis of the device makes pendulum movements. When the movable part 19 is rotated, its length consistently increases due to the telescopic connection of the parts. The suction end of the movable part 19 is always in contact with the ground. This increases the width of the bottom section processed in one pass.

The dimensions of the device are selected so that it is suitable for transportation to a reservoir, for this it can be equipped with a wheeled chassis 27. A drive to the wheels for moving the device when working in a reservoir with a suitable bottom profile (for example, concrete channels) can be made by electric motors on each wheel or by towing.

Depending on the composition of the soil or the profile of the bottom, the wheeled chassis 27 can be dismantled and a tracked chassis 28 can be installed. The tracked chassis 28 is made of small diameter rollers forming two tracks with drive rollers.

In addition, with a complex bottom profile, the device can be equipped with means to give it buoyancy, for example, buoys or pontoons. At the same time, the wheel and caterpillar chassis 27, 28, the discharge pipe 9 are removed for ease.

The impeller 22, shaft 23, screws 14, centrifuge 16 are driven by asynchronous electric motors 21, 30, which change the speed depending on the operating conditions of the device, namely, the throughput of the filter elements and the overall performance of the device with filters installed. Electric motors are powered by a cable of the required length (not shown).

Thus, in the described device, a reduction in energy consumption is achieved when cleaning the bottom of the sludge and bottom sediments. In addition, it becomes possible to purify water from sludge and suspended matter by using two-stage filtration.

Claims (6)

1. A device for cleaning the bottom of ponds, including a receiving pipe, combined with a hopper, the output of the receiving pipe is connected through a block of filter elements with a discharge pipe, characterized in that it further comprises a discharge pipe, the hopper is divided into storage sections, while the storage sections and discharge outlet pipelines are connected through valves to the discharge pipe, the filtering unit block consists of coarse and fine filters, and the filtering element is made in the form of a perforated pipe with a coaxial screw installed inside, while the inlet of the perforated pipe faces the water flow, and the outlet is connected to the sludge collector. 2. The device according to claim 1, characterized in that the outputs of the filter elements of the coarse filter are connected to the sludge collector through a centrifuge. 3. The device according to claim 1, characterized in that at the input of the block of filtering elements choppers with a mesh are additionally installed. 4. The device according to claim 1, characterized in that the receiving pipe has a movable part with a variable length. 5. The device according to claim 1, characterized in that it is mounted on a wheeled chassis. 6. The device according to claim 1, characterized in that it is mounted on a tracked chassis.

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