SU939780A2 - Apparatus for protecting flexible ventilation duct from mechanical damage at fan stars - Google Patents

Description

The invention relates to the mining industry and can be used to ventilate deadlock workings of mines and mines.

By main auto No. 769013, a device is known that includes a housing and a shutter, a chamber pivotally mounted therein, having an upper and lower base, the lateral surface of which is corrugated, and a flexible rod, while the camera is rigidly fixed to the device body with its lower base, a flexible rod is passed through the hole made in the lower base of the chamber '5 and the wall of the device body in contact with the lower base of the chamber is connected at one end to the upper base of the chamber and at the other end to the free end of the gate, which, in its In turn, it is installed at an acute angle to the direction of the air flow and is made with a throttle hole L1J.

The device works as follows.

After starting the fan, air flow through the throttling hole enters the pipeline and somewhat inflates it. As a result of increased pressure in the housing, air also enters through the hole in the corrugated chamber and fills it. The upper base of the chamber rises slowly, gradually opening the gate.

However, this device does not provide sufficient smoothness of the pressure increase in the pipeline when starting the fan, i.e. cannot fully guarantee the protection of flexible ventilation pipes from dynamic damage when the high-pressure fan is turned on, since the increase in air pressure in the pipeline when the gate is opened is fast enough, which is explained by the nature of the dependence of the change in resistance when the gate is opened.

The purpose of the invention is to increase the reliability of the device by ensuring a smooth increase in pressure behind the regulator at the time of starting the fan.

This goal is achieved by the fact that in the device the lower end of the flexible rod is connected to the gate by means of a valve installed with the possibility of overlapping the throttling hole.

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The drawing shows the proposed device, General view.

The device comprises a gate 3 pivotally mounted in the housing 1 using the axis 2, having a throttling hole 4. In the Closed position 5, the gate 3 is inclined at an acute angle to the air flow, which helps to keep the gate in this position and at the same time facilitates its raising. Above the casing is a chamber 5, 10 having a rigid upper 6 and lower 7 base. The lateral surface 8 of the chamber is made corrugated from a dense flexible material. A flexible rod .9 is attached to the upper base of the chamber. 20

In the lower base of the chamber and the upper case there is an opening 11 through which a flexible rod passes, as well as air from the cavity of the case and back. 25

The device operates as follows.

When starting the fan, air enters through the throttling hole 1 in the housing into the chamber 5, creates excessive pressure in it and slowly raises its upper base 6. At the same time, the flexible rod 9 connected with it starts opening valve 10, passing air into the pipeline. After opening the valve, 35 gates 3 begin to rise, increasing the amount of air entering the pipeline. Upon reaching the upper position, the valve rests on the upper base of the housing, and the gate 3 is fully opened.

The proposed device is simple in design, reliable and easy to manufacture.

Its use to protect flexible ventilation pipes from mechanical damage when starting the vent. The radiator will increase the safety of work in dead-end workings and will give an economic effect by preventing damage to ventilation pipes and increasing the productivity of tunnel workers as a result of reliable ventilation.

Claims (1)

Claim A device for protecting a flexible ventilation pipe from mechanical damage when starting a fan according to ed. No. 769013, characterized in that, in order to increase the reliability of the device by ensuring a smooth increase in pressure behind the regulator at the time of starting the fan, the lower end of the flexible rod is connected to the gate via a valve installed with the possibility of blocking the throttle opening.