SU1430547A1 - Joint of flexible ventilation pipes - Google Patents

Description

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The invention relates to the mining industry and can be used in the construction of pipelines from separate flexible vent pipes for ventilation of mine workings.

The purpose of the invention is to increase the tightness of the joint.

The drawing shows the proposed flexible air duct connection.

The connection of flexible ventilation pipes contains a rigid nozzle 1 with an elastic sleeve 2 placed inside it, the ends of which are bred; adaptations 4. At the same time, the length of the elastic sleeve should be about; 3 times the length of the rigid nozzle: ka, and the diameter is equal to the internal diameter: of the rigid nozzle.

The specified parameters of the elastic sleeve are justified by the following. Obviously (see drawing) that the optimum length of a rigid nozzle in terms of economy of the material going to its manufacture is determined by the length of the flexible hose section of the pipe, which is worn over the rigid nozzle, and is equal to

one,

(one)

where 1 is the optimal length of the hard: pipe, m;

dl — length of a piece of flexible ventilation pipe that is worn on a rigid nozzle, m; It is determined from the condition of reliable fastening of the ends of the pipes being connected to the rigid pipe.

Based on the design of the joint (see drawing) and relation (1), the optimal length of the elastic sleeve 1p is equal to

1p 1, 4l1 In - 1 - |

31,

(2)

Changing relations (1) and (2) 55 in a big way leads to an increase in the consumption of material for the manufacture of elastic sleeves. When changing

d

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five

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These ratios to the lower side will not ensure reliable fixing of the flexible ventilation pipes and the elastic hose on the rigid pipe.

The diameter of the elastic sleeve is chosen to be equal to the internal diameter of the rigid nozzle, based on the fact that in this case the possibility of wrinkling between the outer surface of the rigid nozzle and the inner surface of the flexible pipes is necessary.

The tightness of the connection of the ventilation pipes is achieved by the fact that the material of the elastic sleeve, located between the walls of the flexible pipes and the rigid nozzle, under the influence of clamping devices eliminates the influence of unevenness of the outer surface of the rigid nozzle seals its connection with flexible pipes. In addition, the clamping devices in the proposed connection are used more efficiently, since air leaks travel a double way compared to the known connection.

In the proposed joint, the path of movement of the leaks consists of two segments - between the elastic sleeve and the inner surface of the pipe to be connected and between the elastic sleeve and the outer surface of the pipe to be connected. In the known joint, this path consists of one segment — between the outer surface of the rigid pipe and the inner surface of the pipe to be connected. Accordingly, the aerodynamic resistance by leakage in the proposed connection will be two times greater than in the known.

Claims (1)

1. The connection of flexible ventilation pipes, including a rigid pipe, placed inside the connected flexible pipes, and clamping devices, so that, in order to increase the tightness of the connection, it is provided a branch pipe with an elastic sleeve, the ends of which are placed on the external surface of the pipes to be joined and fixed together with them on a rigid branch pipe with the help of a clamping device. 31430547 2 Connection pop.1, otli-1p 31 .., diametrically elastic hose is equal to the inner one where 1p is the length of the elastic sleeve, m; - the diameter of a rigid nozzle, and length 1 is the length of a rigid nozzle, m.