JPS5918039A - Granular material trapping device for granular material carrying vehicle - Google Patents

Abstract

PURPOSE:To hygienically dispose a granular material, by separating the granular material contained in air fed form a granular material storing tank, with the use of a separating means such as a trapping tank, and by returning the thus separated granular material to the granular material storing tank through a mixed phase chamber with the use of compressed air. CONSTITUTION:When a granular material is charged into a granular material storing tank, air in the tank is introduced into a trapping tank 17 through a communicating pipe 38 together with the granular material flying in the air. A coarse granular material is at first separated from the introduced air and trapped by a cyclone 26, and then, in succesively dropped and gathered in a part above a shut-off valve 20. Further, the air flows into a bag filter 27 for trapping a fine granular material, and therefore, the purified air alone is discharged out from a discharge air port 35. The fine granular material adhering to the filter 27 is dropped under vibration and gathered to a part above the shut-off valve 20. The gathered fine granular material is then dropped into a mixed phase chamber 21 through the opened shut-off valve 20 which is then closed again. Subsequently, compressed air is fed through an introduction pipe 43 to transfer air and the granular material to the storing tank through a pipe line 22.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a granular material collection device in a granular material transport vehicle.

Powder container 7 generally attached to the above-mentioned powder transport vehicle
．． In order to prevent a puncture, it is necessary to bleed air when filling the powder or granular material, and for this reason, an air bleed pipe is provided at an appropriate location in the granular material storage tank. However, when filling the powder, there is a risk that the powder will fly up and leak to the outside together with the air. For this reason, a filter is provided at the attachment portion of the air vent pipe, and a means is adopted for collecting the powder and granular material using the filter and discharging only clean air.

However, the above filters tend to become clogged, and attempts have been made to backwash the filters with pressurized air, but this does not provide a sufficient cleaning effect, and powder particles leak outside during backwashing. There is a risk. Particularly when handling powder or granular materials that are toxic, etc., there is a problem from the viewpoint of environmental hygiene, as the above-mentioned leakage may cause injury to the human body.

In view of these points, the present invention connects an air bleed pipe to the powder storage tank, and connects a collection tank equipped with a separation means for separating the powder and air from the air bleed pipe. The separating means separates the powder and granules contained in the air fed through the air vent pipe, and guides the separated powder and granules to the mixed phase chamber, where the powder and granules are accommodated by pressurized air. A device for collecting powder and granular material that is returned to a tank is provided.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to embodiments and drawings.

Reference numeral 1 denotes a powder transport vehicle, and a powder storage tank 6 (hereinafter simply referred to as a storage tank) to which seven or more manholes 4 are attached is mounted on a vehicle frame 2.
is supported so as to be tiltable about a support shaft 7 by a tilting means 5 mainly consisting of a telescopic tilting cylinder 6 attached to the front, and a flexible tube 8 for discharging powder and granular material is provided at the lower rear.
and pneumatic feeding means 10 for sending out the powder and granular material in the storage tank 3 are provided at a suitable location on the side of the storage tank.

The air pressure feeding means 10 includes a switching valve 12 for distributing pressurized air from a compressor 11, and one end connected to the switching valve 1.
2, the other end is led into the storage tank 6, and the canvas (not shown) is stretched to form an air chamber at the bottom of the storage tank, and the pressurized air introduction pipe 16 opens downward.
and a secondary air supply pipe 14 whose one end is connected to the switching valve 12 and whose other end is opened to the attachment part of the flexible discharge pipe 8, and which connects the air pressure feeding means 10 and the A powder discharge means 15 is formed by the tilting means 5.

As a result, when discharging the powder and granules in the storage tank 6, the storage tank 6 is tilted by the tilting means 5, the switching valve 12 is operated, pressurized air is blown into the storage tank 3, and the powder and granules are discharged through the campus. Let it float and send it out,
At the same time, the secondary air supplied to the flexible tube 8 is discharged to the outside through the flexible tube 8.

Reference numeral 16 denotes a powder and granule collection device provided in front of the storage tank B described in -1-. a collection tank 17 for separating bodies, an air vent pipe 18 connecting the collection tank 17 and the storage tank 6, and a collection tank 17.
a mixed phase chamber 21 that is connected to the lower part of the chamber via an on-off valve 20 and stores the powder and granular material collected in the collection tank 17;
It is mainly composed of a discharge pipe 22 for returning the powder and granular material in the mixed phase chamber 21 into the storage tank 3, and the air vent pipe 18 and the discharge pipe 22 are each provided with an opening/closing cock 2.
3.24 is provided.

The collection tank 17 includes a cyclone 26 and a bag filter 2.
The tank housing 60 includes a cylindrical part 61 that accommodates a large number of bag filters 27, and a truncated conical part connected to the lower part of the cylindrical part 61 and having a smaller diameter at the lower part. It is composed of a conical cylinder part 62, and a cylinder part 61.
A partition plate 66 is provided on the lower surface of the interior, and a large number of pack filters 27 each having an open bottom are attached to the upper part of the partition plate so as to communicate with the openings 64 of the partition plate 63.
An exhaust hole 65 is bored on one side, and a cover 66 is provided on the exhaust hole 65 so as to bypass and extract the exhaust gas, and the cover 66 is removably attached to the front opening 11 of the cylindrical portion 61. The opening/closing lid 67 has been removed.

The cyclone 26 is connected to the conical cylinder part 32 and a connecting pipe 68 located above the conical cylinder part and connected to the air vent pipe 18, which opens in a tangential direction to the conical cylinder part 62. That's what happens.

The mixed-phase chamber 21 has a cylindrical shape with a bottom, and an air permeable section 4A40 such as a canvas is installed in the soil part of the room at a distance from the bottom part, so that the room is divided into a powder storage chamber 41 and an air chamber 42. divided,
An introduction pipe 46 for introducing pressurized air from the compressor nozzle 11 is opened in the air chamber 42, and the powder storage chamber 41 is connected to the 1: side of the storage tank 3 and has an opening/closing cock 2.
4 is open.

The introduction pipe 46 described in - may be directly connected to the compressor via a switching valve, but it is preferable to connect it to the switching valve 12 provided on the side of the storage tank, which simplifies the piping, and Suitable when leaning.

Next, to explain its operation, when filling the storage tank 6 with powder or granular material, first open the open/close cock 23 of the air vent pipe 18, and then open the open/close cock 24 of the discharge pipe 22.
And the on-off valve 20 between the collection tank 17 and the multiphase chamber 21 is closed. As a result, when filling powder and granules from the manhole 4, the air in the storage tank 6 is pushed out together with the floating powder and granules and introduced into the collection tank 17, and the introduced air is first passed through the cyclone 26 into coarse particles. is separated and captured, and the separated coarse particles fall sequentially to the on-off valve 20.
is accumulated above. The air from which coarse particles have been removed flows into the bag filter 27, the fine particles are captured by the bag filter 27, and only clean air is discharged to the outside from the exhaust hole 35 and adheres to the bag filter 27. The fine particles fall when the storage tank B is tilted or due to vibrations while traveling, and accumulate on the on-off valve 20.

Next, when returning the powder and granules accumulated in the second part of the on-off valve 20, the on-off valve 20 is opened and the powder and granules are transferred to the mixed phase chamber 21.
Then, the on-off valve 20 is closed again. Then, the opening/closing port 24 of the discharge pipe 22 is opened, and pressurized air is introduced into the air chamber 42 of the multiphase chamber 21 via the introduction pipe 43. As a result, the powder and granules are mixed with pressurized air, and the mixing chamber 2
The pressure inside the container 1 is increased, and the powder and granular material is pumped into the storage tank 6 through the discharge pipe 22 together with pressurized air. The (J[] pressurized air sent into the storage tank 6 reaches the collection tank 17 from the air vent piping 18 in the same manner as described above, and part of the powder and granules contained therein is collected and converted into clean air. only is discharged.

As described above, according to the present invention, when the storage tank is filled with powder and granules, the powder and granules contained in the exhaust gas discharged from the storage tank due to the filling are collected by the collection tank 17. The collected powder and granules are introduced into a mixing chamber and returned to the storage tank using pressurized air, and the powder and granules contained in the exhaust are processed using a so-called closed circuit method, making it extremely hygienic. This method is particularly effective when handling powder and granular materials with toxicity.

[Brief explanation of the drawing]

The drawings illustrate embodiments of the present invention, and FIG. 1 is an overall front view of a granular material transport vehicle to which the present invention is applied, FIG. 2 is a plan view thereof, and FIG. 3 is a granular material collection device. Figure 3 is a longitudinal cross-sectional view of the collection tank, switching cock, and mixing chamber. 1...Powder transport vehicle, 2...Car frame, 3
...accommodation tank, 4...manhole,
5...Tilt means, 10...Pneumatic feeding means, 15...Powder discharge means, 17...
・Collection cock, 18...Air vent piping, 20.
...Opening/closing valve, 21...Mixed phase chamber, 22...
...Discharge piping, 23.24... Opening/closing cock, 25... Separation means

Claims (1)

[Claims] (1) In a powder transport vehicle, in which a powder storage tank equipped with an appropriate number of manholes is mounted on a vehicle frame, and the powder storage tank is provided with a powder discharge means, A collection tank is fixedly installed in the granular material storage tank, and the collection tank is equipped with a separation means for separating the granular material and air, and the collection tank and the granular material storage tank are connected to each other by an opening/closing cock. A mixing chamber is connected to the lower part of the collection tank via an on-off valve, and the mixing chamber is connected to the powder storage tank through a discharge pipe equipped with an on-off cock. The powder and granules collected in the collection tank are introduced into a mixing chamber, and the introduced powder and granules are returned to the powder storage tank by supplying pressurized air to the mixed phase chamber. A powder and granule collection device for a powder and granule transport vehicle, characterized by the following. L2) The powder discharge means includes a tilting means installed between the vehicle frame and the old powder storage tank, and a powder storage tank.