RU208005U1 - DEVICE FOR DETERMINING THE FILTERING RESISTANCE OF DRAINING STRUCTURES - Google Patents

Abstract

The proposed utility model relates to the field of hydraulic engineering, specifically to laboratory testing of drainage structures to determine their filtration resistance and water intake capacity. The device includes a rectangular tray with soil, in which a drainage pipe is placed, covered with a protective filtration material. The device is equipped with a sealed container installed above the tray for supplying water to the tray and a container for receiving drainage runoff with an electric pump with a float installed in it, while the sealed container is equipped with an air tube to maintain a constant water pressure, communicated with a tube for supplying water to the tray, lowered to the bottom of the tray, and a water pipe from an electric pump with a float to return the drainage to a sealed container. The drain pipe at the outlet is equipped with a plug. The utility model ensures the rational use of water and maintaining its constant pressure over the tested design of the drainage pipe due to the automatic mode of water circulation in the system.

Description

The proposed utility model relates to the field of hydraulic engineering, specifically to laboratory tests of drainage structures to determine their filtration resistance and water intake capacity.

Studies to determine the filtration resistance of drainage structures are carried out on rectangular trays ("Methodology for laboratory and field studies of the water intake capacity of drainage structures", VNIIGiM, Moscow, 1988, p. 15.)

The device, taken as a prototype, includes a rectangular tray, a drainage pipe placed in it under the soil layer, covered with a protective filtering material (structure), and a piezometer shield.

The disadvantage of the device, taken as a prototype, is the irrational use of water, which is fed into the tray from the distribution water supply network, followed by discharge into the sewer after filtration through the drain in the tray. In addition, a constant control of the water pressure over the investigated drainage structure is required, manually ensuring its constant value.

The proposed useful model of a device for determining the filtration resistance of drainage structures, including a rectangular tray with soil, a water pipe, a drain pipe covered with a protective filtering material and a piezometer shield, which is equipped with a sealed container installed above the tray for supplying water to the tray and a container for receiving a drainage drain with an electric pump with a float installed in it, while the sealed container is equipped with an air tube to maintain a constant pressure of water over the test structure of the drainage pipe, communicated with a tube lowered to the bottom of the tray, and a water pipe from an electric pump with a float, and the drain pipe at the outlet is equipped with a plug.

The essence of the utility model is to ensure automatic circulation of water and its constant pressure over the tested drainage structure.

The device of the utility model is illustrated by drawings, where figure 1 shows the utility model - front view, figure 2 - left view, figure 3 - right view.

The utility model includes a rectangular tray 1, a sealed container 2 for supplying water to the tray 1, a container 3 for receiving a drainage runoff with an electric pump 4 installed in it with a float 13, a piezometer shield 5. In the tray 1 in pound 7 there is a drainage pipe 6 covered protective and filtration material. The drain pipe is equipped with a plug 8. The sealed container 2 is located above the tray 1 with soil 7, has an air tube 9, communicated with a tube 10 lowered to the bottom of the tray with soil, and a water pipe 11 from the pump 4. Air tube 9 provides a constant water pressure in the tray above the tested drainage structure, which is in the tray with soil, by forming a vacuum above the water level in the tank 2. Water enters the tray with soil from the bottom upwards through a tube 10 lowered to the bottom of the tray to displace the air in the pores of the soil.

The proposed utility model works as follows:

The outlet of the drainage pipe 6 is preliminarily closed with a plug 8. The sealed container 2 is filled with the calculated amount of water from the water supply 15. After the required water pressure in the soil tray is established, the water supply is closed, the plug from the drainage pipe is removed, and the process of water circulation in the device begins. A stream of water 12 flows out of the drainage pipe 6 into a tank 3, in which an electric pump 4 with a float is located 13. After reaching the permissible critical level of water in the tank 3, the float 13 floats up, and the pump 4 is turned on with the supply of water through the water pipe 11 to the almost empty one tank 2, and the process of water circulation in the utility model continues. In the process of testing, measurements are made of the volume of drainage flow on a scale of 16, its temperature, pressure on piezometers 14. Based on the results of these measurements, the filtration resistance of drainage structures and their water intake capacity are determined.

The utility model ensures the rational use of water and the maintenance of its constant pressure over the test structure of the drainage pipe due to the automatic mode of water circulation in the system.

Claims (1)

A device for determining the filtration resistance of drainage structures, including a rectangular tray with soil, a water pipe, a drain pipe covered with a protective-filtration material, and a piezometer shield, characterized in that it is equipped with a sealed container installed above the tray for supplying water to the tray with soil, when In this case, the sealed container is equipped with an air tube to maintain a constant pressure of water over the test structure of the drainage pipe, equipped with a plug at the outlet, and communicated with a tube lowered to the bottom of the tray with soil, and a water pipe from an electric pump with a float, configured to be placed in a container for making drainage flow.

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