JPS5820295B2 - Kukushiki Congouki - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION This invention relates to a method of mixing a gas, preferably air, together while a quantity of particulate material is held in a container.

In particular, the invention relates to a means for regulating the suction of air into a container by using a valve to open and close an inlet for injecting gas into the container.

The prior art is probably U.S. Pat. No. 43,097.828 and/1
63,179,379.

The ultimate purpose of this invention, the mixing or blending of particulates, is very clearly explained in the 43.179,379 patent.

As explained in some detail in some of the sections herein,
A relatively short jet of compressed air is made towards the bottom of a container or hopper containing the two or more particulates to be mixed together in the container.

The air intake is conducted through manifolds at the bottom of the vessel, which communicates with the interior of the vessel through an apertured and sloped lower wall.

Air is channeled or closed by arbitrarily opening or closing the conduits that carry the compressed air from its source to the branch pipes.

A63. The 79,379 patent also describes air flow created by suction injection of air.

This airflow is also a result of the position and orientation of the valve between the manifold and the vessel.

The mixture accomplished in this invention is A3,179,37
There is no certainty that it consists of a similar type of air flow as described in the No. 9 patent.

One drawback of the prior art is that the opening through which the compressed air is injected into the hopper is located in the sloped wall of the container, which surrounds the particulate matter near the bottom outlet so that it is not thoroughly mixed. This created a blind spot.

Another drawback of the prior art is that the use of certain types of filter components prevents particulate matter from entering the container somewhere between the inlet and the source of compressed air. This is something that must be avoided to prevent it from getting inside.

These filters impede air flow and for other reasons the mixing air must be at relatively high pressure to achieve acceptable mixing of the components.

Following the previous method described above, this invention has an air manifold at the bottom of the container or hopper.

However, the opening leading from the branch pipe into the container is located close to the periphery near the outlet at the bottom.

This effectively eliminates blind space from the mixing operation.

Each opening is equipped with a pneumatic poppet valve to open and close it.

The air in the manifold is always maintained under a considerable amount of pressure, and this air pressure acting on the poppet valve closes and opens the opening between the air manifold and the container. are raised and lowered respectively.

Since significant air pressure is maintained in the manifold at all times, particulate matter is prevented from entering the air pipe or the unfiltered air blowing area of the air supply system.

For this or other reasons, the air is injected into the container from the air manifold at a considerably lower pressure than in conventional air mixers while producing at least a uniform and good mixture. I know that I can get caught up in it.

As a further feature, the lift of the poppet valve piston can be varied in order to adjust the amount of air blowing into the container from the air tube.

The invention will be explained in more detail below with reference to the accompanying drawings.

The lower part of the hopper or box container is commonly used with an inwardly inclined side wall 11, a discharge port 12 located at the bottom center, and an annular horizontal bottom formed between the bottom edge of the inclined wall 11 and the outer edge of the opening 12. It has a wall 13 and an inverted conical closing member 14 which closes off the outlet 12.

By means of parts of the invention not shown in the figures, the conical closure member 14 is raised and lowered, respectively, to open and close the outlet 12 so that the particulate contents of the container 10 are discharged through the bottom.

The upper part of the container 10 is constructed in a conventional manner, not shown, and material is conveyed or fed into the container 10 from above.

There is an annular branch pipe 15 located at the bottom of the container 10 and surrounding the bottom outlet.

This tube receives pressurized air from an air supply 16 through a suitable conduit 17.

A number of openings 20 lead from the manifold 15 to the bottom of the container 10 and are spaced circumferentially around the outlet 12.

As best seen in FIG.
3 and occupies the area between the discharge port 12 and the inclined side wall 11.

Each of the holes 20 communicates the interior of the container 10 with the air reservoir 21 of the multi-branch pipe.

The outer sloped portion of the manifold 15 is generally of design 22 and also serves as a passageway through which material is filled into the container 10, but when the material exits through the discharge opening 12. , poured and collected outside the container.

In FIG. 3, an inverted conical closure member 14 is shown in position adjacent to the discharge opening.

This is because its bottom edge rests against the housing of the manifold tube 15.

In order to discharge the contents of the container 10, the closure member 1
4 is lifted by means not shown, and the granules in the container 10 are discharged from the bottom.

The air intake port 23 receives pressurized air from the air reservoir 16 through the conduit 1.
Means are provided for distribution through 7 into the internal chamber 21.

However, normally, a regulating valve or the like would be placed in the piping passage from the air reservoir 16 to the branch pipe 15, but these are not shown as they are not a component of this invention.

Mounted within the manifold 15, opposite and in conjunction with the opening 20, is a commonly designed poppet valve assembly at 25.

The poppet valve assembly includes a cylinder housing 26 having a piston 27 slidingly mounted therein, the piston including a valve stem extending outwardly through the distal end of the cylinder 26 and having a seal at its distal end facing the opening 20. Consists of.

The air inlet 30 is connected to an air reservoir 31 through the housing 26.
Pressurized air from is admitted into the cylinder chamber via a suitable conduit 32.

The cylinder and piston are sealed to make the cylinder airtight.

A threaded rod 35 extends through the housing 26 and is attached to the end opposite the valve rod, and has a groove 36 at one end thereof.

This groove can be used to screw in or out of the housing and unscrew it.

Further, the stop portion 37 is located at the other end.

This stop defines the stroke that the piston 27 makes within the cylinder chamber.

Threaded rod 35 can be adjusted to increase or decrease the stroke length of piston 27.

In operation, the closure member 14 is initially closed to the bottom outlet 1.
2 is closed.

The granules are then protected inside the container 10.

When the solenoid valve 38 is operated such that air from the air reservoir 31 enters the cylinder chamber of the poppet valve 25, the piston 27 is actuated and its uppermost position directs the corresponding opening 20 into the interior of the container 10. Close to direction.

At the same time, air is supplied from the air source 16 to the air chamber 21 of the manifold 15, but at a pressure that is somewhat lower than the pressure supplied to the piston of the poppet valve assembly 25.

This will hold the valve piston so that it closes the opening 20 and no particulates can flow into the air manifold.

A solenoid valve is activated to mix together the materials being filled in the container 10.

As a result, the air pressure applied within the cylinder of the poppet valve 25 is reduced below the air pressure in the manifold chamber 21 .

Piston 27 is therefore driven away from opening 20.

Pressurized air is also injected into the interior of the container 10 through the openings 20 of the manifold tube chamber 21 .

The duration of air injection is an arbitrary matter and depends on many different factors, such as the amount and shape of the materials to be mixed, the degree of mixing desired, the air pressure used, etc.

Anyway, the blowing of air causes the ingredients filled in the container to swirl, so they mix together.

It has been found that some adjustment of the mixing is possible by adjusting the spacing between the sealing end of the poppet valve piston 27 and the opening 20 when the valve is open.

Obviously this will affect the volume and velocity of the air flowing from the manifold chamber 21 into the container and thus have some influence on the mixing.

Although the poppet valve assemblies can be adjusted individually or separately if desired, it is preferred that all of the valve pistons are operated in unison to open and close the apertures 20 at the same time.

However, if it proves desirable or advantageous to operate each or any of the valves independently, this can easily be achieved with the present invention.

All you need is a poppet valve assembly 25
separate air piping from the air reservoir 31 with separately operated regulating valves for each of the air reservoirs 31.

A detailed description of this invention for thoroughly mixing 10 cubic feet of black and white granules is disclosed below.

Black matter has a particle size of 0.093 inch to about 0.070 inch, and white matter has a particle size of about 0.0070 inch to about 0.07 inch.
．． The range is 0.0029 inches.

The air in the manifold was at a pressure of approximately 20 psi.

The opening into the container was approximately 7 inches in diameter.

Mixing requires about 30 seconds of injection through the opening in the hopper, with a 1-second injection time and a 27-second pause between each injection.

These numbers are illustrative and not limiting.

For those skilled in the art, different amounts of substances of different particle sizes are
It has been found that different pressures, injection times, etc. are required.

As can be observed from the foregoing, since there is always an air pressure in the opening 20, which is considered to have a limit of, for example, about 10 to 125 psi, particulate matter in the container 10 can effectively enter the multi-branch chamber. , cannot enter the air supply pipe or flow back into the air supply source.

This eliminates the need for filters or similar components.

As stated in the description of this invention, hoppers and containers such as those described in the prior art patents mentioned above can be readily modified to accommodate the present invention.

Therefore, there is no need to abandon or redesign the entire container.

The embodiments of this invention are listed below.

1. A pneumatic mixer as claimed in the claims, wherein the valve accommodates a pneumatically operated piston facing each opening, which is operated to open and close the discharge openings, respectively.

2. Each valve has a housing mounted within the multi-branch pipe, a piston housed to slide within the housing, and an opening extending into the multi-branch pipe of the piston between the multi-branch pipe and the container. 2. A pneumatic mixer as claimed in claim 1, comprising opposing ends and an air intake into a housing for controlling movement of said piston toward and away from said opening.

30. A pneumatic mixer according to embodiment 3, including means within the valve for moving the piston away from the opening and adjusting its stroke to control the flow of air from the chamber of the manifold pipe to the opening.

4. A pressure air reservoir connected to the air intake of the manifold pipe, a pressure air reservoir having a greater pressure than the first mentioned air reservoir, and the latter air reservoir going to each of the air ports of the valve housing. Embodiment 3, comprising an air pipe mechanism coupled to the air pipe mechanism and a control valve mechanism for arbitrarily closing or opening a passage for pressurized air to the valve housing via the air pipe mechanism to control the operation of the piston of the valve. pneumatic mixer.

5. A mechanism for adjusting the stroke of the piston, a stop located inside the valve housing for stopping the piston from moving away from the opening, and a stop for stopping the piston from moving too close to or away from the opening. and means for adjusting and setting the pneumatic mixer according to embodiment 3.

[Brief explanation of drawings]

FIG. 1 is a sketch showing a combination of pneumatic mixing devices using a specific device according to the present invention. FIG. 2 is a view looking down on the inner surface of the hopper or container. FIG. 3 is an elevational view, partially in section, detailing the embodiment of the invention at the bottom of the container. Explanation of symbols, 10: Container, 16: Air reservoir, 11
: Inclined wall, 20: Opening, 12: Discharge port, 23; Air intake port, 13: Bottom wall, 25: Poppet valve assembly IJ, 14
: conical closing member, 27: piston, 15: multi-branched pipe.

Claims (1)

[Scope of Claims] 1. In a pneumatic mixer for mixing particulate matter, a container for particulate matter having a bottom outlet: a movable closing member for opening and closing said outlet for discharging and retaining particulate matter; an annular air manifold disposed in the lower portion of the closure member including an air chamber and a number of air passageways communicating from the air chamber into the container through spaced openings around the outlet; a manifold having: an air intake for supplying compressed air into the air chamber of said manifold; a pneumatically operated piston member for each of said openings, the closed end of each piston being at the bottom of said opening and said opening; a piston member positioned within the housing of the manifold so as to be located at an end of the air passageway opposite the opening; and a piston member positioned within the housing of the manifold so as to be located at an end of the air passageway opposite the opening; an air port for supplying air into the upper air housing to control the air passage to move the piston member in the direction of the opening and in the direction away from the opening; , a pneumatic mixer in which compressed air is always provided at the opening position.