SU117438A1 - Device for blowing convective heating surfaces of steam boilers - Google Patents

Description

For blowing convective heating surfaces of steam boilers, devices are used consisting of several blowing pipes equipped with nozzles and a head in which there is a hollow spindle used to connect a pipe to it, an electric motor for driving the spindle and a mechanism for performing rotational and reciprocating motion pipes.

A disadvantage of the known devices of this kind is that they do not automate the supply of steam or air to the nozzles of the pipe at the beginning of the blow and stop at its end.

In the proposed device, the specified week is eliminated due to the fact that a shutoff valve is located in the head of the blowing tube, the seat of which is fixed at the upper end of the spindle, and the plate is freely mounted on the movable rod suspended to the head body and pressed to the wellhead.

The drawing shows the blower head of the proposed device in two projections.

The device comprises several blowing pipes 1 provided with nozzles and a head and interconnected by a system of steam lines. A central electric appliance is installed for the series operation of these pipes.

A hollow spindle 2 is threaded in the head of the blowing pipe and is connected to the blowing pipe. The rotational and reciprocating movement of the pipe between the convective heating surfaces of the boiler in the blasting process is provided by an electric motor 3 and gear 4 with a cup 5 fixed on it with slots in which the rollers of the leads 6 are located.

In the head of the pipe there is a shut-off valve consisting of a plate 7 with a rod, the latter is suspended from the head body and nr1 is pressed by a spring 8 to the saddle 9 fastened on the spindle 2.

JMb 117438

When the electric motor 3 is switched on, the spindle 2 with the blowing pipe / starts to rotate and simultaneously move downward, as a result of which the saddle 9 moves away from the plate 7 and provides steam or air to the nozzles of the pipe. When the direction of rotation of the electric motor 5 is changed, the saddle 9 approaches the plate 7 and stops access to the pipe of the blowing agent. The change in the direction of rotation of the electric motor is carried out by means of end shifters.

Subject invention

1. A device for blowing convection heating surfaces of steam boilers consisting of several blowing pipes equipped with nozzles and a head in which there is a hollow spindle used to connect a pipe to it, an electric motor for driving the spindle and a mechanism for performing rotational and reciprocating movement of the pipe , characterized in that, in order to automate the supply of steam or air to the nozzles of the pipe at the beginning of the blow and stop at its end, a stop valve is located in the head of the blowing pipe, with Which is fixed on the upper end of the spindle, and the plate is freely mounted on a movable rod suspended from the body} of the head and pressed onto the saddle by a spring 2. The device according to claim I, characterized in that, in order to transfer simultaneously the rotational and reciprocating movement of the blowing pipe , on a gear freely rotating from an electric drive, a glass with slots is fixed, in which rollers of rollers are mounted, fastened on the outer side of a hollow threaded spindle inserted into a fixed nut.