SU943152A1 - Intake nozzle of suction pneumatic transport installation - Google Patents

Description

one

The invention relates to pneumatic conveying, in particular to a suction nozzle of a vacuum pneumatic conveying installation, and can be used to transport fire extinguishing powders and other fine particulate materials in adjacent sectors of the national economy.

A suction device is known, which comprises a nozzle and an aerating head made in the form of a rotating ripper with a porous body. Aeration air is supplied on a vertical shaft with an internal cavity D.

However, this device has a horizontal rotating ripper, which impedes the movement of the nozzle into the inside of the fine compressed layer; unclaimed material. Therefore, its performance is low, jo. In addition, the disadvantage of this design is the complication of the drive mechanism of the ripper shaft as a result of using an electric motor.

A suction nozzle of a vacuum pneumatic conveying installation is known, which has a tube in communication with the vacuum source and installed in a concentric manner with the possibility of reciprocating a hollow nozzle, connected by a nozzle with a source of compressed gas and having openings for communication with the cavity of pipe C2.

A disadvantage of the known suction nozzle is a slight aeration of the transported bulk material, as a result of which material lumps can clog the conveying tube.

The purpose of the invention is to increase reliability.

Claims (2)

The goal is achieved in that the nozzles are provided with perforated conical. head and placed inside the pipe, while the nozzle is installed coaxially with the nozzle and on it is fixed 9 Kan, the lower part of which is located inside the nozzle. In this case, the bottom of the glass has a diameter equal to the internal diameter of the nozzle, and through holes are made in the wall of the glass placed in the nozzle. FIG. 1 shows a nozzle with the placement of the conical head in the lowest position; in fig. 2 the same, in the extreme upper position. The suction nozzle consists of a pipe 1. Inside the pipe there is a nozzle 2 for supplying compressed air to aeration. A nozzle 3 is fixed on the nozzle 3 in which there are through holes 4. The nozzle is placed with its lower part in the nozzle 5. The nozzles 5 are provided with a perforated conical head 6, which can be made of porous material or twisted in its walls. Air into the head 6 enters from the cavity of the nozzle 5 through the holes 7 made in it. The lower position of the head 6 is determined by the spring 8, which rests on the upper end of the adjusting nuts. 9 The device operates as follows. The collection of bulk material essentially takes place through pipe 1 under the action of the vacuum created in it. The compressed gas for aeration of the powder is supplied through the nozzle 2, the passage through the holes of the glass 3, and enters the cavity of the charge 5. with the internal cavity of the head 6. From this cavity, the air of the wall of the head 6 enters the aeration (through the lower part of the head) and the transportation (through the upper part of the head). At the same time, the air pressure in the cavity of the nozzle 5 drops, and the head 6 under the action of the spring 8 moves down (see Fig. 2). The spring force is adjusted with nuts 9. Next, the cycle of operation of the head 6 is repeated, it performs a reciprocating motion to the aerator and at the same time destroying compressed clumps of granular material. For the embodiment where the walls of the head 6 are made with openings, the ratio of the areas of the aeration and transportation openings is selected from 3: 1 to 2: 1, based on the optimum powder intake conditions. The combination of a pulsating air flow going to the aeration from the head with its reciprocating motion creates favorable conditions for the operation of the intake device. the actual economic effect of the invention will be determined by the results of its practical operation on the basis of a comparison of its performance with those of devices currently in use. Claim 1. Suction nozzle of a vacuum pneumatic conveying installation, containing a pipe connected to a vacuum source and installed hollow nozzle with a possibility of reciprocating movement of a hollow nozzle connected by a nozzle with a source of compressed gas and having openings In order to improve reliability by improving the aeration of the transported material, the nozzles are equipped with a perforated conical head and are placed inside the pipe, while Installed coaxially with the nozzle and a glass is fixed on it, the lower part of which is located inside the nozzle. 2. A nozzle according to claim 1, which is distinguished by the fact that the bottom of the glass has a diameter equal to the internal diameter of the nozzle, and through holes are made in the wall of the glass placed in the nozzle. Sources of information taken into account in the examination of b Patent Germany No. 1019963, cl. 81e, 63, 1958. 2. USSR author's certificate No. 253652, cl. B 65 G 53/1, 1967 (prototype).