JPS582415Y2 - Dust collector bag filter vibration device - Google Patents

Description

[Detailed description of the invention] Powder, particles, and other dust are sucked by the airflow flowing inside the tank, and the dust contained in the airflow is separated and collected from the suction airflow using a bag filter installed inside the tank. In such a dust collector, the bung fill tends to become clogged, so the dust suction action to the tank is interrupted, or the filter is occasionally vibrated without interrupting, and the dust adhering to the filter is brushed off. It is customary to have

However, the dust attached to the bag filter cannot be easily removed by simply vibrating it, so it is necessary to apply vibrations frequently, which reduces the amount of dust that escapes through the filter's eyes. This resulted in a large number of filters, and the filters were inevitably damaged at an early stage.

In order to improve the conventional means for imparting vibration to bag filters, this invention has been developed by attaching a hook rod that suspends the upper end of a cylindrical bag filter to the tank wall surface above the tank in which the filter is housed. A spring is interposed between the hook rod and an inner cylinder whose upper end is closed with an end plate, and the inner cylinder is attached to a fixed cylinder which is installed inside the tank. The fixed cylinder is installed in the lower part of the tank so as to be able to slide up and down inside the cylinder, and the fixed cylinder has its upper end closed with an end plate, and an air pipe for compressed air supplied from outside the tank is connected to the end plate. A small through hole is provided in the circumferential surface of the fixed cylinder at a position slightly below the line where the upper edge of the inner cylinder incorporated in the cylinder is located, thus allowing the passage of water to the outside of the tank. When operating the cock of the air pipe installed in the tank to send high-pressure air to the air pipe inside the tank, the iron pressure pushes down the inner cylinder within the fixed cylinder, so the inner cylinder descends inside the fixed cylinder and its As it descends, the hook rod attached to the inner cylinder compresses or stretches the spring interposed between it and the tank wall, and descends.
At this time, the bag filter becomes significantly slack.

When the lowering occurs so that the front upper edge of the inner circle moves downward beyond the small through hole of the fixed cylinder, the small through hole becomes open, and the high pressure air inside the fixed cylinder flows through the small through hole. It ejects vigorously, shaking the surrounding bag filter with its injection pressure, and as a result, the pressure inside the fixed cylinder is instantly reduced, so the inner cylinder, along with the hook rod, immediately rises inside the fixed cylinder due to the repulsive force of the spring, and the small through hole is moved up. block.

Then, the inside of the fixed cylinder becomes high pressure again, and the inner cylinder is pushed down again.The inner cylinder repeats vertical movement within the fixed cylinder.This causes the hook rod to swing up and down, causing the bag filter to vibrate. Since the dust adhering to the filter is brushed off by vibration, the filter is sieved by the two effects of vibration and injection pressure, resulting in an extremely effective dust removal effect.

In the embodiment shown in the accompanying drawings, the dust collector includes tank 1
bag filters 2, 2, etc. are provided approximately in the center of the tank, a blower fan 3 and an exhaust pipe 4 are provided at the upper end of the tank 1, a hopper is provided at the bottom of the tank 1, and an intake pipe 5 is provided in the middle of the hopper. The bottom of the hopper is equipped with a dust removal lower which is always covered with a lid 6.

The blower fan 3 has its rotating shaft 30 connected to the rotating shaft of an air motor 8 attached to the top plate of the tank, and an air pipe 9 for blowing compressed air from a compressor (not shown) is attached to the motor 8. .

The bag filters 2, 2, . When the dust flows into the filter 2 and flows out of the filter 2, the filter 2 separates and collects the dust in the airflow, and the collected dust flows through the through hole 22 to the bottom of the lower hopper. Fall and accumulate.

In order to prevent the pack filters 2, 2 .

As shown in FIG. 1, this device is constructed by hooking a hook rod 21 with a filter attached thereto using tension springs 23, 23, etc. stretched between it and the tank 1 so that the hook rod 21 can move up and down. Alternatively, as shown in Fig. 2, the hook bar 21 is placed on an elastic spring 25 attached to a collar piece 24 protruding from the tank wall so that it can move up and down, and as a means for generating the up and down movement, A small cylinder 10 is mounted upright in the tank 1, and an inner cylinder 11 that slides in the lower half of the fixed cylinder 10 is installed, and the inner cylinder 11 has a bottom projecting downwardly from the fixed cylinder 10. The plate 12 is attached, and the hook rod 21 is connected to the iron plate 12.

The fixed cylinder 10 closes its upper end and connects an air pipe 13 equipped with a pressure regulating valve 18 to the end plate, and a switching valve 14 is provided between the iron pipe 13 and the air pipe 9 of the air motor to operate the compressor. Connect to the air pipe 15 of

The fixed cylinder 10 is provided with several small through holes 16 at positions below the line where the upper end edge 11' of the inner cylinder 11 assembled therein is located.
1' is closed with an end plate.

In the above configuration, when the switching valve 14 is operated and compressed air from the compressor is sent from the pipe 15 to the air motor 8 via the pipe 9, the motor 8 rotates at high speed and rotates the shaft 30 connected to its rotation shaft. and the fan 3 rotates at high speed.

Thus, the airflow generated by the fan 3 flows out of the tank through the exhaust pipe 4, and the pressure inside the tank 1 is reduced.

In this way, dust-containing air can be sucked in from the suction port (not shown) of the suction tube 5.

When it is desired to change the suction amount, it can be easily adjusted by operating the air amount adjustment valve 17 provided in the air pipe 9 and adjusting the amount of air flowing into the air motor 8.

When the bung fillers 2, 2, . . . become clogged, the switching valve 14 is switched to send compressed air to the pipe 13 side.

However, in this case, the switching valve 14 may be configured to be triangular switching, so that compressed air can be sent to the pipe 13 while the air motor 8 is rotating.

When air pressure is sent to the tube 13, the iron pressure flows into the fixed cylinder 10 and pushes down the inner cylinder 11 with that pressure.

The lowering of the inner cylinder 11 also lowers the hook bar 21 against the elasticity of the spring 23 or 25, but when the upper end edge 11' of the inner cylinder 11 descends below the small through hole 16 of the fixed cylinder 10, the fixed cylinder 10 The high pressure inside is blown out into the tank 1 from the small through hole 16 all at once.

In this way, the ejection pressure causes the bag filter around the small through hole to shake, thereby brushing off the dust adhering to the filter.

This sweeping action is extremely effective because air pressure is sprayed inward from the outside of the filter.

When the high pressure inside the fixed cylinder 10 is ejected, the pressure inside the cylinder 10 is immediately reduced, and the inner cylinder 11 rises again inside the fixed cylinder 10 by the elastic force of the spring 23 or 25 to close the small through hole 16.

In this way, the inside of the fixed cylinder 10 becomes high pressure again, and the inner cylinder 11
is pressed down to eject high pressure from the small through hole 16.

In this way, the inner cylinder 11 repeatedly moves up and down within the fixed cylinder 10, so that the bag filter 2 vibrates, and dust adhering to the filter 2 is brushed off.

Note that when the pressure regulating valve 18 is operated to change the inflow pressure into the fixed cylinder 10, the bag filter 2 can be vibrated more reliably.

As described above, the bag filter vibrating device of this invention not only has the effect of blowing off dust by repeatedly applying slack and tension to the filter, but also blows the filter from the outside with high-pressure air that imparts the vibration effect. The brushing action was even better, and the device was able to be superior in practical terms.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway front view of the bag filter vibrating device of the present invention, and FIG. 2 is a partially front view of another embodiment. 1 is a tank, 2 is a bag filter, 13 and 15 are air pipes, 10 is a fixed cylinder, 11 is an inner cylinder, 16 is a small through hole, 2
1 is the hook rod, 23.25 is the spring.

Claims (1)

[Scope of utility model registration request] In a dust collector in which a bag filter separates and collects impurities contained in the airflow flowing through the tank, the bag filter is formed into a cylindrical shape and has an iron part. The upper end is attached to a hook rod installed above the tank, and the hook rod is installed with a spring interposed between it and the tank wall so that it can vibrate within the tank.The upper end is attached to a part of the hook rod. An inner cylinder closed with an end plate is attached, and the inner cylinder is installed in the lower part of a fixed cylinder installed in the tank so that the inside of the cylinder can vibrate up and down, and the upper end of the fixed cylinder is closed with an end plate. At the same time, an air pipe for compressed air supplied from outside the tank is connected to the end plate, and the circumferential surface of the fixed cylinder is slightly below the line where the upper edge of the inner cylinder built into the cylinder is located. A bag filter vibrating device with a small through hole in the lower position.