SU1221391A1 - Auger blast stower - Google Patents

Description

The invention relates to the field of the mining industry and can be used in the development of mineral deposits with a storage space.

The purpose of the invention is to increase the transportation distance of the filling material and increase the reliability of the machine.

The drawing shows the proposed machine, longitudinal section.

The screw-pneumatic stacking machine consists of a feed funnel 1, a screw channel 2, a screw 3 with a drive 4, a mixing chamber 5, an air supply 6 and a transport 7 pipelines, while the air supply pipe 6 is placed inside the hollow shaft of the screw 3. The mixing chamber 5 is designed as a cylindrical casing 8, inside which, using compression springs 9, with a possibility of longitudinal movement, is installed an upstream valve 10, made in the form of an annular piston with sealing rings 11, and one end of the check valve 10 you olnen as a converging tube with a conicity of 70-90, and the other end of the check valve 12 has a safety fitting.

The machine works as follows

At the beginning of work, i.e. in the absence of the filling material supply. In the machine, the check valve 10 under the action of the elastic force of the spiral springs 9 is in the front (leftmost) position and closes the auger channel 2. At the same time, the compressed air from the air supply pipe 6 through the nozzle 12 freely flows in the transport pipeline 7 and thus prepares the route for the filing of the filling material.

When the filling material is fed into the machine, the last of the loading funnel 1 by screw 3, driven in rotation from drive 4, moves along screw channel 2 in the direction of mixing chamber 5, while (due to the variable (decreasing) pitch of turns of screw 3) the material is compacted. The check valve 10 under the action of compacted material, overcoming the force of elasticity of the compression springs, moves along

VNIIPI

Order 1625/41

Branch PPP Patent, Uzhgorod, st. Design / 4

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the movement of the material and opens access of the material to the mixing chamber 5.

The implementation of the front end face of the check valve 10 of confused shape with a taper of 70-90 ° allows using one half of the longitudinal force developed by the material under the action of the auger, to open the check valve, and the other half to unload the material (through the slit) into the mixing chamber 5, than is achieved rational use of longitudinal force and increasing work efficiency.

Compressed material through a circular slit formed between the end of the screw 3 and the check valve 10, evenly distributed over the entire area of the slit, begins to flow into the cavity of the mixing chamber 5, where it is picked up by a stream of compressed air coming from the pipeline 6 with a large (close to sound) speed and in the form of an air mixture is carried into transport pipeline 7. At the same time, in the mixing chamber 5 (in the material discharge zone) an ejection force is formed, as a result of which the loads on the turns of the screw 3 (respectively, on the drive) are sharply Nishaty. The breakthrough of compressed air from the mixing chamber 5 into the feed funnel 1 is prevented by the speed of movement of the sealing plug formed between the end of the screw 3 and the check valve 10 from the compacted layer of filling material, as a result of which the back pressure in the transport line and the material transportation distance are significantly increased.

When the material supply is stopped, the return valve 10 under the action of the elastic force of the springs 9 moves to its original position and closes the cavity of the screw channel 2, thereby preventing the breakthrough of compressed air from the mixing chamber 5 into the feed funnel 1.

The penetration of the bulk material into the zaporshnevoy cavity when moving the piston is prevented by the nozzle 12, which at any position of the piston isolates the zaporshnevoy cavity from the mixing chamber 5, increase the reliability of the machine.

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Claims (3)

1. SCREW AIR FILLING MACHINE, including auger, screw channel, mixing chamber, air supply and transport pipelines, characterized in that, in order to increase the transportation distance of the filling material and increase the reliability of the machine, the mixing chamber is made in the form of a cylindrical casing, inside of which with the help of elastic elements, a check valve is installed with the possibility of axial movement, made in the form of an annular piston with sealing rings, one end of which has a safety tional nozzle, which is arranged concentrically in the transport pipe. 2. Machine pop. 1, characterized in that, in order to reduce the resistance to movement of the filling material in the screw channel, _{β the} other end of the check valve is made in the form of a confuser with a taper of 70-90 °. 3. Machine pop. ^ characterized in that the elastic elements are made in the form of helical cylindrical compression springs. SU ,, „1221391