SU484905A1 - Device for flushing drainage pipelines - Google Patents

Description

to mechanization

The invention relates to reclamation work.

A device for flushing drainage pipelines is known, which includes a hydraulic plug with an axial channel through which the haul cable with a floating scourer fixed at its end, and a driving drum.

The aim of the invention is the possibility of creating a high-speed water flow in the lower part of the pipeline and at the same time increasing the efficiency of flushing.

For this, in the proposed device, the floating scourer is made in the form of a cylindrical cylinder with a truncated bottom part, which smoothly transforms into a half-cylinder, while a two-view pressure sensor is fixed in its front part, and a nozzle is placed in the axial channel of the hydraulic plug.

The hydraulic tube has a seal.

FIG. 1 schematically shows the proposed device in section; in fig. 2 is a section along A-A in FIG. one.

The proposed device includes a hydraulic plug 1 with an axial channel 2 in which a nozzle 3 with two flanges 4 and 5 is placed, a drive drum 6 with a current collector 7 and a pressure indicating device 8.

In the pipe 3 there is a hole 9 for supplying pressure water.

Through the guide rollers 1O, nozzle 3 and axial channel 2, a cable is passed through 11 with a floating scourer 12 fixed at its end, which is made in the form of a cylindrical cylinder with a truncated lower part, smoothly passing into a half-cylinder.

 Pipe 3 hydraulic plugs; It has a seal 13 for inserting a pull wire, for which a cable equipped with an additional pull wire can be used.

At the front of the squeezer, the two-position sensor 14 for controlling the movement of the squeezer through conduit 15 and transmitting an electrical signal to the indicator is fastened to the pull cable 11.

pressure supplied with a light signaling normal and maximum pressures.

In the lower part of the scrubber 12, there is a counterweight 16, ensuring its stable position in the pipeline and (including turning around its axis.

The proposed device works as follows.

A pressure sensor 14, a diverter 12 connected to the cable 11, and a hydraulic plug 1 are introduced in series into the flushing pipeline.

A supply line is connected to the flange 4 of the nozzle from the pump installed on the industrial machine (not shown).

Then water is supplied through conduit 3 and through the opening 9 enters the internal cavity of the hydraulic plug and conduit 15.

Under the action of water pressure, the plug casing enlarges in volume and is wedged in the pipeline, thereby increasing the pressure in the latter.

The flow of water then flows through a slit gap in the lower part of the pipeline, formed by a floating scourer, exerting a certain pressure on it. At the same time, with a relatively small flow rate of the supplied water, the speed in the silt gap and at the outlet of it is rather high and amounts to about 8 to 10 m / s at a pressure of 1 O atom.

The flow rate is sufficient to erode sediment deposited on the walls of the pipe. pipelines that are carried along by this stream, forming a kind of high-speed train.

As you move away from the crush, the water velocity in the plume decreases, causing solid particles to fall out, which increases the additional increase in the initial sediment layer.

When winding the cable 11c of the drive drum 6, the scrubber is set in motion by the action of the pressure of the water flow.

At the same time, the high-speed loop of water flow created by it also mixes through the pipe

source and deposited sediment solids.

The spreader moves continuously, and the deposits through the pipeline - wave-like, while .. the speed of movement of the weave and the speed of smack of the cable 11c of the drum 6 must be consistent with the transporting capacity of the flow,. that is, with the transport of particles in a suspended state by a stream of particles; with an increase in the speed of movement of the grinder 12 and the size of the sediment layer, the consistency of the formed slurry increases, and the pressure in the pipeline required for its transportation increases. Therefore, at a critical speed, the scrubber, when the consistency of the slurry is high and the flow of water can no longer transport a large volume of sediment, the latter are deposited on the bottom of the pipeline and completely block it. At the same time, the pressure in the pipeline increases instantaneously to the maximum value.

To prevent this, the speed of the jammer is monitored by a two-position pressure sensor 14, whose readings can be taken independent of the change (within certain limits) of the length of the pipeline being cleaned, since the main component of pressure loss is local loss in the erosion zone of the first largest sediment wave.

The adjustment of the sensor 14 to the working pressure is carried out experimentally on the basis of several test cleaning of pipelines with the same degree of silting,

In accordance with; With the indications of the pressure indicating device 8, the rotation speed of the drum b is set, and thereby the rate of penetration of the scrubber through the pipeline is ensured without the possibility of blocking it.

An on / off pressure sensor 14 provides an electrical signal to the pressure indicating device 8 when the velocity of motion of the scrubber corresponds to the normal course of the process; cleaning the pipeline at a transport pressure corresponding to the lower working pressure, and in the case when the movement speed of the scrubber slightly exceeds, for example by 15-20%, the indicated speed. As a result, an emergency situation can occur; At this speed, the scrubber pressure in the pipeline corresponds to the upper working pressure,.

 The range of pressure variation allows to provide limits for the speed / motion regulation of the scrubber.

Therefore, controlling the movement of the scrubber is reduced to a change in the speed of rotation of the drum 6 and maintaining the maximum operating pressure in the pipeline while on the device 8. the pressure indication is constantly on the white light,

The ignition of an additional red kidney indicates a critical mode of transporting sediment and the need for pumping the pipeline with water. After the red light goes out, the cable rewinds and the flushing of the pipeline continues,

In this sequence, the process continues continuously until the scourer passes through the entire cleaned pipeline.

At the same time, the sediment discharged from the flushed pipeline enters the drain channel or the collecting tank (not shown), from where they are removed by known methods.

6 Subject of the invention

Claims (2)

1. A device for flushing drainage pipelines, including a hydraulic plug with an axial channel through which the haul cable with a floating distributor strengthened at its end, and a driving drum, characterized in that in order to enable high-speed water flow to be created in the lower part of the pipeline and at the same time increasing the efficiency of flushing, the floating reflector is made in the form of a cylindrical cylinder with a truncated lower part, smoothly transforming into a half-cylinder, while strengthening its n-off pressure sensor, and an axially disposed tube settee hydraulic pipe, 2. The device according to claim, 1, characterized in that the pipe is hydraulic. The cork has a seal. M