JPS5841200Y2 - Powder container discharge aid - Google Patents

Description

[Detailed description of the invention] The present invention deals with powder and granule contents (synthetic resin pellets, hygroscopic powder, etc.) that cannot be easily discharged even if a cone-shaped discharge part is provided in the container due to shape, adsorption, etc. This invention relates to a discharge aid suitable for promoting and controlling the discharge of

In general, discharging powder and granules tend to cause bridging within the cone-shaped discharge section of the container due to their shape, adhesion, or hygroscopicity, and they stick near the throat-shaped section toward the discharge port, impeding smooth discharge. do.

As a countermeasure to these problems, it is effective to increase the discharge port diameter or increase the slope angle for discharge (angle α1 in Figure 3), but it is effective to use a discharge port cover or a discharge aid with an opening/closing mechanism that can be removed and attached. As the ingredients become larger, an increase in cost is unavoidable.

Another method is to rotate the container before discharging the container and break the bridge before discharging it, but rotating the container takes time and makes continuous transport of powder and granules difficult.

As another measure, it is possible to attach an air hammer to the conical discharge part of the container or to install an air inlet made of a perforated plate, but in either case, each container would have to be modified, resulting in significant costs. It will be up.

When discharging powder and granules from a container, the present invention utilizes a discharging aid attached in place of the lid previously attached to the discharging port, and from the nozzle marked on the cylindrical side wall of the discharging aid. This method attempts to prevent bridging by continuously or intermittently blowing air into the conical discharge part of the container, and will be explained below with reference to the drawings.

FIG. 1 is a front view of a container 1 containing powder and granular material. (not shown).

The container 1 is normally transported or stored in the attitude shown in FIG.

When discharging the contents of the container 1, after removing the lid 4 shown in Fig. 1, attach the ejection aid 5 (Fig. 2) according to the present invention to the discharge port 3, and then use a reversing machine or a crane as shown in Fig. 3. Then, the valve lever 6 is used to set the opening degree, and the powder 9 is dropped while supplying pressurized air from the air hose 7 to the air hose connection port 8 to the internal air blowing nozzle.

In FIG. 4, which shows a vertical cross-section of the discharge aid 5, the cylindrical body 10 of the aid is connected to the discharge port 3 via a packing 11, and a discharge sleeve 13 is provided on the lower surface of the outward flange 12 at the lower end. A flange 16 at the upper end of the short pipe 15 is tightened with a plurality of bolts via an outward flange 14 at the upper end of the cloth tube, and a flange 17 at the lower end of the short pipe 15
The flow control valve 18 is tightened with a plurality of bolts.

The discharge sleeve 13 has a rope 19 at its lower end for tying the sleeve itself and completely closing the powder passage.

Reference numeral 20 is a flow control valve, and by operating the valve lever 6, the non-existing flow control valve 20 can be throttled with a wire (not shown).

An air blowing pipe 22 stands concentrically with the center line 01 of the cylindrical main body 10, and the lower end of the air blowing pipe 22 is curved in an L shape and passes through a hole in the side wall of the main body 10 while maintaining airtightness. The side protrusion forms an air hose connection port 8.

The air blowing pipe 22 is provided with a lid 23 at the upper end, and is slightly
Two nozzles 24 are located at the same height below and open upward by an angle α2 from the horizontal.

The illustrated air blowing tube 22 is a pipe with a circular cross section, and the two nozzles 24 are located on the horizontal diameter of the air blowing tube 22.

In order to maintain the attitude of the air blowing pipe 22 with respect to the main body 10, a reinforcing plate 25 is welded to the main body 10 and the air blowing pipe 22.

The air blowing pipe 22 extends from the discharge port 3 into the conical discharge portion 2 by a distance Ll, and this dimension L□ is approximately equal to the dimension from the lower end of the discharge port 3 to a position where bridging is likely to occur.

On the other hand, the air hose 7 is connected to an air tank (both not shown) via an on-off valve and a pressure regulating valve.

When the contents in the container are being discharged in the postures shown in FIGS. 3 and 4, pressurized air (2 to 3 kg/cm2) is blown into the conical discharge part 2 of the container from the nozzle 24.

Then, the air ejected from the nozzle 24 mixes with the powder and granules in the vicinity thereof, increases the fluidity of the powder and granules, and agitates the powder and granules.

As a result, the force of pushing the powder and granules together is reduced, and the powder and granules flow downward under the action of gravity without forming a bridge.

The air ejected from the nozzle 24 vibrates the powder and granules in a relatively wide area in the vicinity, promoting a relative sliding phenomenon.

In addition, since the air is ejected diagonally upward, the negative pressure that may occur at the top of the container is reduced by discharging the powder and granules downward.In fact, the pressure in the upper space inside the container is actively increased, and the powder and granules are discharged downward. It exerts an extrusion effect on the body.

As explained above, in the present invention, the cylindrical body 1 of the ejection aid 5 is attached in place of the lid of the container during ejection.
An air blowing nozzle 24 that opens diagonally upward into the outlet of the container during discharge is provided on the side wall of the container 1, and the air blowing nozzle 24 is connected to an external air supply pipe, so there is no need for any modification to the container 1. The formation of bridges can be prevented by using the discharge aid 5, which is attached instead of a lid when discharging the powder or granular material, without adding.

Since the number of discharge aids 5 is a small number, which is less than a fraction of the number of containers 1, it is sufficient to provide only a small number of discharge aids with air blowing nozzles 24, and an increase in cost can be suppressed as much as possible.

In addition, the air ejected diagonally upward from the nozzle 24 increases the fluidity of the powder and granules that are prone to bridging near the discharge port 3, and can be stirred, so the pressing force between the powder and granules is reduced and the powder The particles smoothly flow downward under the action of gravity without forming bridges.

Therefore, according to the present invention, there is an advantage that wear and tear caused by the rubbing of the powder and granules can be avoided, and the durability of the nozzle 24 can also be ensured.

For example, when synthetic resin pellets with a diameter of 3 mm are housed in the container 1 and the slope angle α1 of the conical discharge part 2 is 45°, L,
=5QQmm, diameter of nozzle 24 is 3mm, jet angle α
2 was set to 60°, the two nozzles 24 were able to reliably prevent the occurrence of bridging.

Note that the present invention can be implemented in various ways.

For example, as shown in FIG.
It is also possible to add two nozzles 26 with a phase difference of '.

In that case, if the blowing angle of the nozzle 26 is changed to the blowing angle α2 of the nozzle 24, the bridging prevention effect will be increased.

The number of nozzles can also be increased further.

If the location where bridging is likely to occur has not been confirmed in advance, install the nipple 28 at the upper end of the air blowing pipe 27 as shown in Figure 6.
It is also possible to selectively attach air blowing pipes 29 of various sizes via the .

As shown in FIG. 7, a ring 30 with a cap-shaped cross section is fixed to the outer peripheral surface of the main body (attachment) 10, a plurality of nozzles 31 are provided on the main body 10, and a hose is inserted into an annular space 32 between the main body 10 and the ring 30. The connection port 33 can also be opened.

[Brief explanation of drawings]

FIG. 1 is a front view of the container, FIG. 2 is a front view showing the discharge aid according to the present invention attached to the outlet of the container shown in FIG. 1, and FIG. 3 is a front view showing the container in an inverted state.
Fig. 4 is an enlarged vertical cross-sectional view of the ejection aid part in the state shown in Fig. 3, Fig. 5 is a sectional view showing another embodiment, and Figs. 6 and 7 show still another embodiment. FIG. 1...Container, 3...Discharge port, 5.
...-Discharge aid, 7... Air hose (air supply pipe), 10... Cylindrical body, 19...
... Rope (opening/closing mechanism), 24... Air blowing nozzle.

Claims (1)

[Scope of utility model registration request] In a discharge aid with an opening/closing mechanism that is attached to the discharge port of a powder container that faces downward during discharge, an air blowing nozzle that opens diagonally upward into the discharge port of the container during discharge is installed on the side wall of the cylindrical main body of the discharge aid. A discharging aid for a container for powder and granular material, characterized in that an air blowing nozzle is connected to an external air supply pipe to increase the fluidity of the powder and granular material above the discharge port and agitate the powder and granular material at the time of discharge.