SU897931A1 - Device for measuring water leakage from pressure water duct - Google Patents

Description

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The invention relates to devices for measuring water leakage from pipelines, in particular from underground water conduits, such as tunnels and mines.

A device is known for detecting water leaks from pipelines, including sealing elements that form a closed volume G1.

A disadvantage of this device is that the accuracy of measuring water leaks from the pressure conduit to the surrounding massif is low, due to the leakage part of the water and unapproved parts of the tunnel bypassing the sealing elements.

The closest technical solution to the invention is a device for measuring water leaks from a pressure conduit, comprising two annular chambers located on the inner side of the conduit lining and connected to the discharge line Cz.

This known device does not have sufficient reliability and measurement accuracy.

The purpose of the invention is to increase the reliability of the device and the accuracy of measurements.

The goal is achieved by the fact that the device is made with an additional annular chamber located between these two cameras w,

10 and the latter are interconnected and with the discharge pipeline ;, and an additional chamber is connected to one of them.

In Fig. 1 shows the device

15 in the tunnel, a longitudinal section / in FIG. 2 shows section A-A in FIG. one.

The device includes a housing 1, perimeter, seals 2 and 3 | the discharge and overflow pipe 5 would be 20, the overflow pipe 6 with the flow meter 7.

The housing 1 is made hollow, for example from a steel pipe with a length of one and a half to three diameters of the conduit. Four perimeter adjustable seals 2 and 3 are fastened to housing 1, for example from rubber chambers J two of which are located along the edges of the pipe, and two in its middle part. The distance between the middle seals 3 is 0, -5-1, 0 of the diameter of the conduit.

On the inner side of the housing 1, a discharge pipe i is inserted into its wall, through which water is supplied during the tests, a bypass pipe 5 connecting parts of the body 1 limited by the extreme 2 and middle 3 seals, a bypass pipe 6 connecting the parts of the body 1, bounded by extreme 2 (left) and middle 3 (left) and two middle seals 3. There is a water meter 7 on the overflow pipe 6. Seals 2 form two annular chambers 8, and seals 3 form an additional annular chamber 9.

The device works as follows.

8, a tunnel prepared for testing 10 is delivered to the device, for example, on a frame on a pneumatic passage, and is placed in an operating position at the beginning of the test section. Press the perimeter seals 2 and 3 to the lining 11 of the tunnel 10. Connect the discharge pipe to the pump and fill the chamber (annular cavities) 12-14 with water between the device 1 and the trim 11, while maintaining the specified pressure, B chamber (cavity) water enters through the overflow pipe i | and into the chamber (cavity) 13 through the overflow pipe 6. Under the action of pressure, the water begins to be filtered through the lining 11 of the tunnel 10 into the rock and bypassing the extreme perimeter seals 2 into the tunnel 10, Because which of the extreme chambers (cavities) 12 and 1 h The flow of water flows back into the tunnel, which cannot be the case when the pressure equipment is in operation, when processing the results of the experiment, take into account that part of the total water flow that is filtered into the rock from the central chamber (cavity) 13. At the same time, the conditions of experience corresponding to the actual Since the flow of water around the perimeter seals 3 on the central chamber (cavity) 13 to the extreme

, chambers (cavities) 12 and 14 and back will not, due to almost equal water pressure in all cavities.

The invention provides a high accuracy of the experiment in determining the leakage of water from the pressure conduit, which is an expression of the positive effect of the proposed technical solution.

Claims (2)

Apparatus of the Invention A device for measuring water leaks from a pressure conduit comprising two annular chambers located on the inner side of the conduit lining and connected to a discharge pipe, in order to increase its reliability and accuracy of measurements, it is made with an additional annular chamber, located between the two chambers, 5 the latter being connected between by itself and with the discharge pipeline, and an additional chamber is connected to one of them. Sources of information 0 taken into account in the examination T. USSR author's certificate G kl. G 01 F 13/00, 1970. 2. USSR author's certificate No. 804758, cl. Е 02 В 3/16, 1979 5 (prototype) „S 5 2 Ш f 4