JPS6145569B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a powder transport vehicle that uses a part of the engine as a compressor.

In a typical powder transport vehicle, compressed air from a compressor is used to transport powder and fluid in a fluidized state when loading and unloading the powder and fluid loaded into a tank.

To explain this with reference to FIG. 1, the vehicle body 1
The tank 3 attached to the tank is configured to be freely tiltable via the cylinder 2. For example, when transferring the powder in the tank 3 to the silo 4, the tank 3 is held in an inclined state and the tank 3 is tilted via the power extraction device 5a. engine 5
Compressed air from a compressor 6 driven by a portion of the output of the compressor 6 is sent through the primary passage 8a and blown out from the bottom of the tank 3, and the powder is forced through the discharge hose 7 while being fluidized.

A portion of the compressed air from the compressor 6 is sent to the secondary passage 8 in order to adjust the mixing ratio of the compressed powder and air.
b is introduced into the discharge hose 7 downstream of the shutoff valve 9 as secondary air.

In this way, powder and granular materials are automatically loaded and unloaded, but in this case, if the shape of the powder to be pumped is large, flat, or heavy, or if it is transported over a long distance, , the pressure from the on-board compressor 6 is often insufficient.
In such cases, it was necessary to send the waste to silo 4 with the assistance of another compressor.

Also, when transferring powders with light specific gravity, there is no need to use very high pressures, but when transferring such items especially in a hurry, it would be ideal to be able to increase the air volume, but in the past, controlling the transfer speed was insufficient. It had not been done before.

In order to solve this problem, the present invention uses a compressor driven by a vehicle engine and a compressor obtained by cutting fuel for some cylinders of the engine in parallel or series. The present invention provides a powder transport vehicle that can double the pressure and flow rate when pumping powder and granular materials.

Embodiments of the present invention will be described below based on the drawings.

FIG. 2 is a system diagram of the present invention, and the fact that the tank 3 is configured to be freely tiltable with respect to the vehicle body 1 is the same as in FIG. The same reference numerals are used for the same parts as in the figures.

In this embodiment, the engine 5 is an eight-cylinder diesel engine with a V-shaped arrangement, and the exhaust pipe 10a
and 10b are for each column #1 to #4 and #5 to #8, respectively.
It is configured separately corresponding to the 4 cylinders, but the muffler 1
They merge at part 1.

Then, one cylinder on one side of engine 5 (#1
~#4) is equipped with a fuel supply cut mechanism (not shown) so as to function as a compressor when loading and unloading powder/fluid into the tank 3. The cylinders in the opposite row (#5 to #8) always function as an engine, so when the fuel in cylinders #1 to #4 is cut off, the output rotation of cylinders #5 to #8 The #1 to #4 cylinders are driven and simply act as compressors that forcefully feed air sucked in from an intake passage (not shown) to the exhaust passage 10a. An air passage 12 branched from the middle of the exhaust passage 10a connects to the primary passage 8a of the tank 3, and cutoff valves 13 and 14 are provided downstream of this branch point, respectively.

Note that the cutoff valve 14 on the exhaust passage 10 side can also be used as an exhaust brake and a switching valve 20 for increasing exhaust pressure.

A filtration device 15 is installed downstream of the cutoff valve 13 to capture impurities such as oil cyst. Further, a suction passage 17 of a compressor 6 driven by the engine 5 is connected upstream of the cutoff valve 13, and a discharge passage 18 is connected to the air passage 12 downstream of the cutoff valve 13.

A three-way switching valve 1 is provided in the middle of the absorption passage 17.
9 is interposed to block the suction port of the compressor 6 1
3, or to the atmosphere. The air passage 12 branches into a primary passage 8 a that communicates with the tank 3 via a distribution valve 16 and a secondary passage 8 b that communicates with the discharge hose 7 .

In addition, the above-mentioned cutoff valves 13 and 14 or switching valve 1
9 may be manually operated, but the switching operation may be electrically controlled. In addition, the above tank 3
Alternatively, the internal air slide plate 21 etc. may be tilted in advance so that the powder and granules are collected at the discharge port, and the dump mechanism (cylinder 2) can be omitted.

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

While the vehicle is running, all cylinders #1 to #8 of engine 5
Fuel is supplied to the engine, and all cylinders are operated as usual, producing high output according to demand.

In this state, the cutoff valve 13 is closed and the cutoff valve 14 is opened to allow all the combustion exhaust in the exhaust passage 10a to flow into the muffler 11.

At this time, the three-way switching valve 19 opens on the atmosphere side and closes on the passage 12 side, so the exhaust gas will not be sent into the suction port or leak directly to the outside from here (of course, the compressor 6 will not be driven at this time). ).

Next, stop and transfer the powder from tank 3 to silo 4, for example.
When transferring the fuel to the engine, first, the fuel supply to the cylinders #1 to #4 on one side of the engine 5 is cut off, and the fuel cut cylinders #1 to #4 are driven by the output rotation of the cylinders #5 to #8.

Then, in these cylinders #1 to #4, the air sucked into the cylinders through the intake valves is pushed out as it is through the exhaust valves into the exhaust passage 10a in the exhaust stroke, and exhibits a function equivalent to that of a so-called compressor.

If the shutoff valve 14 is closed in this state, the discharged air will flow to the passage 12 side, but first, when the required pressure of the air supplied to the tank 3 is high, the shutoff valve 13 is left closed and the three-way switching valve is closed. 19 to the passage 12 side, and simultaneously drives the compressor 6. As a result, the engine discharge air is supplied to the suction side of the compressors 6 connected in series, and relatively increases the discharge pressure of the compressors 6 as so-called primary pressurized air.

This highly pressurized air passes through a filtering device 15 and is forced into the tank 3 from a distribution valve 16 in a clean state, and a portion is introduced into the discharge hose 7 as secondary air.

As a result, the powder in the tank 3 is fluidized and is forced into the silo 4 from the discharge hose 7 under high pressure.

Next, when the required pressure for pumping powder is not so high but a large flow rate is required, switch the aforementioned three-way switching valve 19 to the atmospheric side and open the shutoff valve 13 to open the engine 5 (cylinders #1 to #4) and the compressor 6 are connected in parallel, and the air discharged from both is sent under pressure to the tank 3.

As a result, the amount of air discharged is doubled, and powder can be efficiently transferred using a large amount of compressed air.

Further, when the required pressure and flow rate are small, if the compressor 6 is stopped and only the air discharged from the engine 5 is supplied, the engine output can be minimized.

Note that, unlike the engine 5 that drives the vehicle,
Only a small amount of output is required, so cylinder #5 on one side
Only #8 can sufficiently drive compressor 6 and compressor cylinders #1 to #4.

As described above, in the present invention, some cylinders of the engine are used as compressors and are selectively connected in series or parallel with an existing compressor, so that high-pressure air can be supplied according to demand and the compressor can be assisted by a compressor other than the vehicle. Coarse particles and particles with high specific gravity can be efficiently transported over long distances without any problems, and high-speed transport can also be achieved by doubling the amount of discharged air if necessary.

[Brief explanation of the drawing]

FIG. 1 is a side view of a conventional device, and FIG. 2 is a system configuration diagram of the present invention. 1... Vehicle body, 3... Tank, 5... Engine, 6... Compressor, 7... Discharge hose, 8
a...Primary air passage, 8b...Secondary air passage, 1
0a, 10b...exhaust passage, 12...air passage,
13, 14...Shutoff valve, 15...Filtering device, 17
...Suction passage, 18...Discharge passage, 19...Three-way switching valve.

Claims (1)

[Claims] 1 In a transport vehicle that has a powder loading tank attached to the vehicle body and is capable of discharging powder and granular materials by supplying compressed air into the tank, the fuel supply to some cylinders of the vehicle engine is cut off. an air passage branching from the exhaust passage of the partial cylinder from which the fuel is cut and connecting to the tank;
A shutoff valve is installed in the exhaust passage and the air passage downstream of this branching point, a compressor is driven by the vehicle engine and has its discharge passage connected downstream of the shutoff valve in the air passage, and a suction passage of the compressor is provided. A powder and granular material transport vehicle, comprising a switching valve that selectively connects the upstream side of the shutoff valve of the air passageway to the atmosphere.