SU1408015A1 - Method and apparatus for cleaning drainage line from silt deposit - Google Patents

Abstract

This invention relates to the operation of reclamation systems. The purpose of the invention is to increase the cleaning efficiency. Before cleaning, the device is mounted via connector 4 at the end of the outlet well 15 of the drainage pipe 5. Turn on the source of compressed air 1 and feed it through duct 2 and outlet 3 for purging into the pipe 5 being cleaned. Simultaneously from the tank 6 for flushing water flow 7 set the water flow to the dispenser. The dispenser is mounted in tank 10 by means of hinges 11 and provided with a counterweight 12 and stop 13. After filling the estimated volume of water, the dispenser tilts at hinges 11 and the water is poured into the tank 10. From the tank the water is drawn into the outlet 3, where it is picked up by air flow and carried to the pipeline 5. Due to the fact that the container 6 and the tank 10 are connected to the duct 2, the pressure in them and in the outlet 2 is equalized. Water plugs are inserted at a predetermined time interval, c. This interval depends on the nature of the deposited sediment in the pipeline, 5, 2 sec. f-ly, 4 ill. (About ate

Description

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The invention relates to the operation of reclamation systems and is intended for the cleaning of ground drainage of closed drainage pipelines.

The purpose of the invention is to reduce the cost of wash water and increase cleaning efficiency.

Figure 1 shows the scheme of the device for cleaning the drainage pipeline (yes; figure 2 - drainage pipeline

{cleaning process using water (f

| cork dviz5 1seys under the influence of the AIR flow; FIG. 3 is a graph of the cost of cleaning from a silt to a pipeline depending on the time interval for the entry of adjacent sediment plugs; FIG. 4 is a graph showing the change in and COST of cleaning up silting with silt sediments of a pipeline 100 m long, depending on the length of the water plug ().

I Compressed air is supplied from source i of compressed air through duct 2 ri and outlet 3 for purging with connector 4 for mounting at the end of the drainage pipe 5. From tank 6 water flows through flow regulator 7 and pipe 8 enters dispenser 9, is mounted in the tank 10 by means of sharnirov 11 and supplied with a counterweight 1 and | stop 13. Moreover, the main tank 6 and the reservoir 10 are connected through the air exhaust duct 2 to the source 1 of compressed air by means of connecting pipes 14. The drainage pipe is cleaned through the viewing point 15 at. the aid of water plugs 1 moving under the influence of air flow. .

The method is carried out as follows.

Before cleaning, the device is mounted via connector 4 at the end of the main pipeline 5 coming out of the shoe 15. Compressed air is psi through the duct 2 and outlet 3 for purging into the cleaned drain pipe 5.

At the same time, from the rinse water tank 6, the flow regulator 7 is set with the help of the flow regulator 7. In this case, the water flow from the tank 6 to the dispenser 8 is achieved so that the filling time is within the time interval between the air supply and the two adjacent water plugs.

After filling the dispenser 8 with the estimated water consumption (it is equal to

0

with

0

five

the water in the water plug 16) the center of gravity of the dispenser 8 with water is displaced in the opposite direction from the counterweight 12, it overturns on the hinges 11 and the water is poured into the tank 10, and from it into the outlet 3, where it is picked up by air flow and carried to the pipeline 5 .

The dispenser 8, by virtue of the counterweight 12 and the stop 13, is in its original position, is filled with water and new water is fed to the tube 16 in the pipeline. The automatic entry process for water plugs is repeated until the pipeline is completely clean. After cleaning one section of the pipeline, the device is dismantled and installed on the New drainage well.

Since the main tank 6 and the tank 10 are connected to the duct 2j, the pressure in them and the outlet 3 is equalized, which provides better conditions for water to enter the dispenser 8 and the outlet 3. In addition to equalizing the pressure, the air flow through the tank 10 to the outlet 3, picks up a portion of water poured from the dosing tank and, together with a moving one, along the outlet 3, forms a compact water stopper 16 by the main air flow.

For cleaning pipelines of various diameters requires a different estimated volume of water of one plug, calculated from the dependence

.. 1GB2

. W 1 -J-,

where W is the calculated volume of water in the sample ke, m;

1 - length of a water plug, m, optimum values of length 1 (3 ... 6) D obtained experimentally;

D is the diameter of the pipeline being cleaned; its value varies from 0.05 to 0.2 m.

The optimal parameters of the length of water plug 1 (3 ... 6) D were obtained by conducting experimental studies. Figs 3 and 4 show that during the cleaning of drainage pipelines with a diameter of 50.75,100,125 and 15.0 mm, minimum economic costs were obtained when the length of the water plug was equal, respectively, and At this time, 1 does not depend on the type of deposits in the pipeline 314080

de. Thus, the cost of cleaning a drainage pipeline with a diameter of 100 mm and a length of 100 m from sedimentation with sandy sediments with a length of water plug is 2.20 rubles, at 1.68 rubles, at 1.35 rubles, at 50 rubles, at 1, 90 rubles, i.e. most efficiently.

A decrease in the length of the water plug Q leads to an increase in the cleaning time and, consequently, its cost. The increase leads to an increase in the cost of water and the cost of cleaning. I

Changing the position of the counterweight 12 I J5 relative to the dispenser 8, regulate the estimated volume of water required for one stopper 16. When cleaning pipelines of smaller diameter (0.05 ... 0.075 m), the counterweight 12 is installed closer to the dispenser 8, it is for this, it overturns with less filling (less calculated volume of water). When cleaning pipelines of a larger diameter (O, 15 ... 0.020 m) and 25, the weight of 12 is removed from the dispenser 8, it overturns with a large filling. The stop serves to keep the dispenser in the initial position without water.

Thus, the flow of water-JQ plugs 16 into the cleaned pipeline 5 occurs automatically, and their speed is controlled by the source 1 of compressed air. As a result, the cleaning is carried out in two stages - cleaning the pipeline from coarse sediment particles with air traps and cleaning the pipeline with water plugs from humus and colloidal soil particles.

This is due to the fact that the lighter particles of sediment are weighed and removed primarily by water flow. Humus gives the soil the property of stickiness, the more it is, the more resistant the soil to the effects of air flow. When the soil is depleted of humus (it is washed out with a water plug), the property of stickiness decreases, which subsequently reduces the resistance of ground sediments to blowing by air flow. lump (air traffic jams). Therefore, depending on the physico-mechanical composition of the soil deposits, the time interval (... 8 s) between the input of adjacent plugs 16 is set. When sanding sediment is silting the drainage pipelines, it is optimal with.

35

45

50

Q

5 0 5

Q

.

five

five

0

sandy with loamy t 4 with and clay with. These values allow the drainage pipelines to be cleaned with minimal economic costs (Fig. 1). Fig. 3 shows the change in the cost of cleaning up the sedimentation of the pipeline, depending on the time interval for the entry of adjacent plugs and the type of sediment. The cost of cleaning the drainage pipeline with a length of 100 m from the sandy sediments with a time interval for the introduction of adjacent traffic jams with is 2.30 rubles, with s, 1.80 rubles, with .c 1.48 rubles, with s 1.35 rubles. , with с 1.65 rub., and with с 2.45 rub., i.e. most efficiently with. A decrease in .t leads to an increase in the cost of washing water, and consequently, the cost of cleaning. The increase leads to an increase in time.

When cleaning the drainage pipeline with a diameter of 100 mm and a length of 100 m from the sandy sediment, water plugs with a length of 4 m with an interval in the input mode of the adjacent plugs must be supplied with a volume of water in one tube

, 43-l - -0 - l i 0,00314 M 3, 2 l.

In this case, the speed of movement of water plugs through a 4.3 m / s pipeline, which is regulated by an air flow generator, is achieved.

When cleaning the drainage pipeline with a diameter of 75 mm and a length of 100 m from clay sediments, water plugs with a length of 375 m with a time interval for entering adjacent plugs c and a volume of water in one tube must be supplied

.1 ,, oo1656 мз.

“1, 7 l.

In this case, the speed of movement of water plugs is 4.3 m / s.

Claims (1)

1. A method of cleaning a drainage pipeline, including the supply of wash water and compressed air to the source of the drainage pipeline, characterized in that, in order to increase the cleaning efficiency, the flow of compressed air is in portions in the form of water. plugs are fed into the cavity drainage f1 / gg about W / .J 7 8 9 t.c About 1 56 C) 7 8