JPS6017723B2 - Powder and granular material carrier - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a vehicle for transporting powder, granular materials, lumps, etc., and in particular, the loading and unloading operations thereof are automated using air pressure.

Powder such as cement, lime, iron powder, flour, fertilizer, rice,
A dedicated tank equipped with a tank for transporting granular materials such as soybeans, synthetic resin pellets, soap powder, lumps such as stone powder, tankal, crushed solid fuel, and flakes such as paper chips and wood chips. Vehicles are being used.

By the way, methods are used to load and unload these powders and granules by suctioning or pumping them using air pressure, but depending on the type of powder or granules, loading and unloading operations may not proceed smoothly and work efficiency may be reduced. There were times when the process was not completed properly or required a lot of manpower.

In particular, unlike ordinary cargo, which can be loaded and unloaded anywhere, for example, the discharge destination is a silo or tank, or it is not possible to simply discharge it outside. Measures are also required to prevent dust from accumulating during cargo handling operations.

The present invention was proposed in order to solve such problems, and it improves the suction loading and transporting and unloading of powder and granules, as well as dust processing, filter cleaning, powder suction, and discharge efficiency. The purpose of the present invention is to provide a transport vehicle for powder and granular materials that can automatically carry out lifting, aeration, etc.

Hereinafter, embodiments will be described based on the drawings.

As shown in FIGS. 1 and 2, a closed tank 2 is mounted on a truck chassis 1, and each tank 2 has an input port 3 that can be opened and closed at the top and a discharge port 4 at the rear bottom. The vehicle is configured so that it can be tilted down with the lower rear end as the center of rotation via a hydraulic jack (not shown). As is clear from the air pressure circuit shown in FIG. 3, a suction hose 5 communicating with the upper interior of the tank 2 and a pressure feeding hose 6 connected to the discharge port 4 are provided.

In addition, four secondary filters 7a, 7b and 8a, 8b, which extend from the front to the rear and suction the air inside the tank, are removably disposed inside the upper part of the tank 2, and are attached to the truck chassis, which will be described later. Secondary filter 9a layered on 1
, 9b, based on the suction action of the blower 101, it is possible to carry out suction loading.

A butterfly valve 12a is provided in the confluence pipe 11a of the primary filters 7a, 7b, and a butterfly valve 12b is also provided in the confluence pipe 11b of the primary filters 8a, 8b.
These converge downstream of the valve to form the suction conduit 12.

The pipe line 12 is connected to the pipe line 14 via a two-lot type switching valve 13a.
This pipe line 14 is connected to check valves 15a, 15
It is applied to the suction side of the secondary filters 9a and 9b via b.

Pipe 16a connected to the suction side of the secondary filters ga and 9b
, 16b are connected to the blower 10 via the front multi-valve 17.
The suction line 18 or the discharge line 19 connected to the suction side of the pump is selectively fitted. The front multi-valve 17 is connected to the pipe line 16
a and 16b to the suction pipe 18 at the same time, or connect one pipe 16a to the suction pipe 18 and simultaneously connect the other pipe 16b to the discharge pipe 19, or vice versa. Can be connected.

The discharge pipe 19 is connected to a rear multi-valve 22 via a silencer 20 and a check valve 21, and the valve 22 selectively sends blower discharge air to pipes 23, 24, 25 and 26.

The pipe 23 passes through the bottom filter 28 of the tank 2 through the check valve 27, and blows out high-pressure air to the bottom of the tank 2 during pressurized unloading.

In addition, the conduit 24 supplies air to the ejector section 29 formed inside the discharge port 4 through the check valve 30 during this pressurized unloading, and the powder is removed from the discharge port 4 by the suction action of the ejector section 29. Increase pumping efficiency. Therefore, when unloading under pressure, the multi-valve 22 is switched so that the pipes 23 and 24 are connected to the discharge pipe 19 at the same time. The pipe line 25 is connected to the above-mentioned suction pipe line 12, and is connected to the primary filters 7a, 7b.
, 8a, 8b or during aeration of the suction silo 31, air is sent in the opposite direction from the suction side to the primary filters 7a, 7b, 8a, 8b.

Further, the pipe line 26 is for discharging discharged air to the outside during suction loading. Next, when cleaning the secondary filters 9a, 9b, a discharge pipe 33 is provided which is connected to the suction side of the filters 3a, 9b via check valves 32a, 32b and discharges air. The suction port 5a of the suction hose 5 can be connected to the end of the suction hose 33. The suction pipe 14 is opened to the atmosphere through a two-way valve 13a and a switching valve 13b that opens and closes reversibly, and the air is sucked into the pipe 14 through the valve 13b during the aeration. do.

Note that 34 is an operating lever for the two lotus type switching valves 13a and 13b. Swivel joints 35 and 36 are interposed between the pipes 14 and 33, so that the pipes 14 and 33 can be bent freely when the tank 2 is loaded. 37 and 38 are leaf valves provided in the suction pipe line 14 and the discharge pipe line 19, and the relief valve 37 is a negative pressure valve that is activated when the suction pressure becomes excessive due to clogging of the primary filters 7a and 7b, etc. The relief valve 38 has a relief function and prevents the discharge circuit from rising excessively.

In addition, 40 in the figure is a butterfly valve provided at the discharge port 4;
Reference numeral 41 denotes a pressure feeding receiving silo, and the suction silo described above is attached to the outside regardless of the vehicle.

Separately from the discharge port 4, an opening/closing lid (not shown) is provided at the rear of the tank 2, and when the tank 2 is tilted, the opening/closing lid can be raised to allow gravity discharge.

The present invention is constructed as described above, and its operation will be described next.

First, the work of loading the powder and granular material stored in the suction side silo 31 into the tank 2 will be explained based on the system diagram in FIG. 5a, and the primary filters 7a, 7b, 8
Fully open the butterfly valves 12a and 12b of a and 8b, open the two-way type switching valve 13a and close 13b, and then set the front multi-valve 17 to the suction side, that is,
The pipes 16a and 16b are connected to the suction pipe 18 at the same time, and the rear multi-valve 22 is connected to the discharge pipe 19 and the atmosphere discharge pipe 26.
Set each so that it is suitable for you. Of course, the discharge port 4 is closed at this time. In this condition, blower 10
is driven to evacuate the inside of the tank 2 and start sucking the powder.

That is, as the blower 10 is driven, the primary filter 7a,
The air inside the tank 2 is suctioned through the pipes 7b, 8a, 8b, and this air flows from the pipes 11a, 11b to the pipe 12.
It flows through the switching valve 13a, the pipe 14, the check valves 15a, 15b, and is further filtered through the secondary filters 9a, 9b, and then passes through the pipes 16a, 16b, the front multi-valve 17, and the suction pipe 18. It is sucked into the proa 10, and from this discharge pipe 19 there is a silencer 20 and a check valve 2.
1 and is discharged to the outside from the conduit 26 via the rear multi-valve 22. Due to the vacuum thus generated, the powder and granular material stored in the suction side silo 31 is suction loaded into the tank 2 via the suction hose 5.

The dust generated at this time is filtered through the primary filters 7a, 7b, 8a,
8b and secondary filters 9a, gb prevent release to the outside. ．． Note that this suction load can be sucked not only from the silo 31 but also from piled up items or items deposited at low places while moving the suction port 5a of the suction hose 5.

Also, when loading powder and granular material sent from other pressure-feeding tanks or feeders, the same connection circuit is used to suck the dust through the primary filters 7a, 7b, 8a, and 8M, and the dust is discharged to the outside. You can put it in so that it doesn't.

Also, when loading the tank 2 through the input port 3 at the top, the tank 2 can be efficiently loaded without creating dust.

However, in this case, the suction port 5a of the suction hose 5 is connected to the conduit 33 to prevent suction from being applied to the hose 5. Next, the process of unloading the powder loaded in the tank 2 into the external silo 41 will be explained with reference to FIG.

First, the pipe line 12 connecting to the primary filters 7a, 7b, 8a, 8b is changed to the suction side pipe line 12 by closing the switching valve 13a and opening the switching valve 13b via the valve operating lever 34.
At the same time, the end of this conduit 14 is opened to the atmosphere.

The front multi-valve 17 is kept at the same level as in FIG. 4 above, and the rear multi-valve 22 is switched to the pressure feeding position. In other words, for pipe line 19, pipe lines 23 and 24
The valve 40 of the discharge port 4 is opened, and the pressure feed hose 6 that passes through the silo 41 is connected. When the blower 10 is driven in this state, the switching valve 13
The air sucked in through b passes through the pipe line 14 and the secondary filter g.
a, 9b, pipes 16a, 16b, multi-valve 17, and pipe 18 to the blower 10, and further passes through the discharge pipe 19 and multi-valve 22, and the discharged air is sent from the pipe 23 to the bottom filter of the tank 2. The inside of the ejection tank 2 is pressurized through the ejector 28, and the pipe 24 is also connected to the ejector part 29 of the outlet 4, and the powder and granules near the outlet 4 are sucked and discharged by the ejector effect.

Due to these pressurization and suction actions, the powder and granules filled in the tank 2 are efficiently transported to the silo 41 via the pressure hose 6 on the air flow.

This discharge work can be performed more efficiently by rotating the tank 2 downward with the discharge port 4 side using a hydraulic jack, which is particularly effective for discharging fine powder such as cement and wheat flour. It is.

In this way, suction loading and pressure feeding and unloading are performed, but during suction loading, compaction of the powder and granules occurs in a part of the suction hobber of the silo 31, and the powder and granules are compressed despite the suction action. Air serration as a countermeasure when suction cannot be done efficiently will be explained based on FIG. 6.

In this case, from the state shown in Fig. 4, the two-lotus type switching valve 13
a and 13b, the valve 13a is closed and the valve 13b is opened, and the blower 10 is driven for a short time so that the rear multi-valve 22 is connected to the discharge pipe 19 through the conduit 25.

The air sucked through the proer 0' through the conversion valve 13b follows the same route as above, passes through the rear multi-valve 22, pipes 25 and 12, and then passes through the next filters 7a and 7b.
, 8a, 8b from the suction side into the tank,
This pressurized air is blown out through the suction hose 5 into a part of the suction hopper of the silo 31, causing the powder and granules that have become compacted inside to flow and release the compaction. Once the serrations have been made in this manner, the suction action can be started again by returning the switching valves 13a, 13b and the rear multi-valve 22 to the suction loading position.

Next, to explain the cleaning of the primary and secondary filters,
This is done on the premise that this is carried out after the above-mentioned pressure-feeding and discharging as shown in FIG.
For cleaning of the primary filters 7a and 8b, the rear multi-valve 22 is switched from the state shown in FIG.
Pressurized air is ejected from Tb, 8a, and 8b in the opposite direction to the suction, and the powder stuck outside the filter is blown away and cleaned.

This powder is then pumped and discharged into tank 2, which is emptied.
Since the dust is fed into the silo 41 from the discharge port 4 via the transport hose 6, the dust during cleaning does not leak to the outside. At this time, if the circuit of the filters 73, 7b and 8a, 8b is divided into two and connected to pressurized air by alternately opening and closing the butterfly valves 12a and 12b, the four filters 7a, 7b , 88, 8b, the filter permeation pressure during ejection by the two filters 7a, 7b or 8a, 8b is doubled, so that clogging can be reliably removed.Furthermore, as shown in FIG. The secondary filter shown is 9a?g.
For cleaning b, the front multi-valve 17 is connected, for example, by connecting one pipe 16a to the suction pipe i8 and the other pipe pipe 6b to the discharge pipe 1.
9, and the rear multi-valve 22 is switched to a position where the conduit 19 is completely cut off from any of the conduits 23 to 26.

Since the pipe line 16b of one of the secondary filters gb is on the discharge side, the air sucked through the cut valve 13b and the pipe line 14 is transferred from the secondary filter ga to the pipe line 16a and the multi-layer filter via the check valve 15a. The flow is reversed from the blower 10 via the valve 17 and the suction line 18, then through the discharge line 19 and the multi-valve 17 and the secondary filter 9b via the line 16b, and expanded through the check valve 32b to the line 33. It is blown out into the tank 2 through the suction hose 5.

Clogging is removed by back-feeding to the secondary filter 9b, and this removed powder is sent from the tank 2 to the silo 41 via the pressure hose 6, so that the dust is not released to the outside in the same way as above. It can be prevented. And one secondary filter E9
After cleaning of pipe 1 is completed, switch the multi-valve 17 in the opposite direction to the above, and pipe 16b becomes the suction side.
Since the filter 6a is on the discharge side, the other secondary filter 9a can be cleaned in the same way. In this way, after discharging the powder from the tank 2 into the silo 41, the primary and secondary filters 7a, 7b, 8a, 8b and 9a, 9b can be easily cleaned.

By the way, one embodiment of the multi-valve 22 is shown in FIGS. 9 and 10.

A rotating shaft 51 is supported at the center of the valve case 50, a handle 52 is coupled to the protruding end of the shaft, and a valve plate 53 is connected to the end of the shaft, and as the rotating shaft 51 rotates, a valve opening is raised on the valve plate 53. The relative position of 54 changes in the circumferential direction.

The partition plate 551 that comes into sliding contact with the valve plate 53 is connected to the pipe line 2 described above.
3 to 26 connection ports 23a, 24a, 25a, and 26a are formed, and the connection ports 23a to 26a that match the valve 〇54,
Air is fed under pressure from the connection port 19a of the discharge pipe 19 connected to the valve case 5M. The partition plate 55 also has an area (
10) is formed. Therefore, by operating the handle 52 and switching the valve plate 53 to the rotational position, pressurized air from the discharge pipe 19 can be transferred to each pipe 23.
~2 needles can be selectively fed into the corresponding connection ports 23a~268.

Note that the front multi-valve 17 is also configured in substantially the same manner. As explained above, according to the present invention, the loading and unloading of various powder and granular materials to be transported can be carried out automatically and efficiently using air pressure, thereby improving the efficiency of cargo handling operations. On the other hand, cleaning of the primary and secondary filters is extremely simple, resulting in good maintenance and maintainability, and the work environment can be improved because these cargo handling operations can be performed without emitting dust to the outside.

Figure 1 is a side view of the present invention, Figure 2 is a rear view, Figure 3 is a circuit diagram of the air pressure system, Figures 4 to 8 are circuit diagrams explaining the operating state, FIG. 9 is a sectional view of the multi-valve, and FIG. 10 is a side view of the same.

Gasket...Truck chassis 2...Tank 3...Inlet, 4...Outlet 5...Suction hose, 6...Pressure hose, 7a? 7b, 8a, 8b...Primary filter, 9
a, gb...Secondary filter, IQ...Blower, 13a,
Stove 3b...Switching valve, IT...Front multi-valve, 1
9...Discharge pipe line, 22...Rear multi-valve, 23,2
Tortoise, 25, 26...Pipeline, 29...Disjector part.

Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure completed Figure 8 Figure 9 Figure 10

Claims (1)

[Claims] 1. In a transport vehicle equipped with a tank for storing powder and granular materials, a primary filter that suction-filters the air inside the tank, a secondary filter arranged in series with this primary filter and provided outside the tank, A switching valve that switches and opens the suction line between the primary and secondary filters to the atmosphere, and a multi-purpose valve that is inserted into the suction line of the blower and connects the secondary filter to the blower suction line and discharge line. a valve, a multi-valve that is inserted into the discharge pipe of the blower and selectively supplies discharged air to the tank, a suction pipe upstream of the switching valve, or the atmosphere; a suction hose that communicates with the inside of the tank; A powder and granular material transport vehicle characterized by being equipped with a pressure feeding hose to be connected.