JPH0726271Y2 - High-pressure transportation equipment for powders - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention is used in the technical field of high-pressure transportation for transporting various powders at a high pressure. The present invention relates to a high-pressure transportation apparatus for powder and granules, which has a function of preventing blockage of the transport tube that occurs and discharging the powder and granules remaining in the blow pot and the transport tube at the end of transportation.

[Prior Art] A conventional high-pressure transportation apparatus for powder and granules is disclosed in, for example, JP-A-63-3193.
As seen in Japanese Patent Publication No. 9, by supplying pressurized gas to a blow pot (pressurized tank), a transport pipe connected to the lower end port of this blow pot, and an air knife attached in the middle of the transport pipe, It is configured to plug-transport the powder or granular material contained in the blow pot through the transport pipe.

[Problems to be solved by the device]

However, in the high-pressure transportation device having the above-mentioned configuration, when a power failure occurs during transportation, the powder or granular material contained in the blow pot is gradually extruded by the residual pressure toward the transportation pipe side and There was a problem that the powder and granules were filled up and clogged, and the transport of the powder and granules could not be resumed when the power was restored.

In addition, the above-mentioned high-pressure plug transportation is low-speed transportation (2-10 cm /
Therefore, there is a problem that powder particles remain in the blow pot or the transportation pipe at the end of transportation and mix with other powder particles to be transported next. In the case of transportation, there is also a problem that residual powder and granules are mixed into these measured powder and granules to increase the transportation amount.

Therefore, the technical problem of the present invention is that even if a power failure occurs, the transport pipe can be resumed as it is without being blocked when the power is restored, and at the end of the transport, the powder remaining in the blow pot and the transport pipe is retained. The purpose is to discharge and transport the granules to prevent mixing of the granules.

[Means for Solving the Problems]

Means taken in the present invention to solve the above technical problems are as follows.

By supplying pressurized gas to a blow pot, a transport pipe connected to the lower end port of this blow pot, and an air knife provided in the middle of the transport pipe, the granular material contained in the blow pot is plug-transported through the transport pipe. In the apparatus configured as described above, (1) a shut valve is attached to the transport pipe on the front side of the air knife, and an air vent valve is attached to the blow pot.

(2) In the control device that opens and closes the shut valve and the air vent valve, the shut valve is closed when a power failure occurs, the air vent valve is opened for a certain time when power is restored, and pressurized gas is sent to the air knife. After the powder and granules remaining in the transportation pipe are transported, a shut-off valve is opened to restart the transportation.

(3) A control device that opens and closes a shut valve attached to the transportation pipe once closes the shut valve at the end of transportation, pressurizes the blow pot to a predetermined pressure, and then opens the shut valve again to blow blow pot. Also, a means for treating residual powder or granules that discharges and pressures the powder or granules remaining in the transportation pipe is provided.

However, in this case, the air knife is to open the air knife valve at intervals to supply pressurized gas into the transportation pipe at intervals, and to plug the powder particles sent from the blow pot at intervals. Means to transport.

[Action]

 The above means operate as follows.

The element described in (1) above can completely stop the transportation (outflow) of powder particles sent from the blow pot by closing the shut valve, while the air vent valve is opened inside the blow pot. It is possible to release the residual pressure of and return to the initial state.

The element described in (2) above can prevent the granular material from flowing out into the transportation pipe due to the residual pressure in the blow pot because the shut valve is closed when a power failure occurs. The transport pipe can be prevented from being blocked, and when the power is restored, the air vent valve is opened to release the residual pressure in the blow pot and return to the initial state, while pressurized gas is sent to the air knife to leave the granular material remaining in the transport pipe. Since it is discharged and transported, the load at the time of restart is reduced and it is possible to re-transport without blocking the granular material.

The element described in (3) above increases the internal pressure of the blow pot to, for example, about ² to 4 kgf / cm ² after the end of transportation, and then opens the shut valve, so that the powder or granular material remaining in the blow pot is removed. The bridge collapses and the powder and granules adhering to the inner wall are also peeled off.
Since it flows at a high speed of 60 m / s, it is possible to solve the problems such as discharging and transporting the powder and granules remaining in the transport pipe, mixing the powder and granules in the next transportation, and changing the amount of the metered transported goods. To do.

As described above, the technical problems described above can be solved by the above means, and the problems of the conventional technology can be solved.

〔Example〕

Hereinafter, preferred embodiments of the high-pressure transportation apparatus for powder and granules according to the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 shows the overall structure of the present invention, in which 1 is a blow pot, 2 is a hopper for supplying the granular material G connected to the upper end opening of the blow pot 1 through a seal gate 3, and 4 is a hopper. A transport pipe connected to the lower end opening 1a of the blow pot 1, 5 is an air knife attached in the middle of the transport pipe 4, 6 is an air vent valve attached to the exhaust port 1b of the blow pot 1, 7
Indicates a shut valve attached to the transportation pipe 4 between the air knife 5 and the lower end opening 1a.

Further, 8 is a compressor which is a supply source of pressurized gas,
Each main supply pipe 9 has a pressure valve.
13 via the air knife valve 14 and the booster valve 15, the pressure pipe 10, the air knife pipe 11,
A booster pipe 12 is connected, and the pressure pipe 10 is further branched into branch pipes 10a, 10b, 10c for supplying pressurized gas to the upper portion and the central portion of the blow pot 1 and the lower end opening 1a. Further, in the figure, 16 is a level switch, and 17 is a pressure gauge for detecting the internal pressure of the transport pipe 4.

FIG. 2 is a block diagram showing an electrical configuration of the control unit of the present invention constructed by using a microcomputer. It is composed of a CPU which is the center of the control unit and a memory (ROM) which stores a system program. Configured control device 1
8 includes the above-mentioned seal gate 3, air vent valve 6, shut valve 7, pressure valve 13, air knife valve 14, booster valve 15, and level switch.
16, the in-pipe pressure gauge 17 and the compressor 8 are electrically connected to each other, and each is constructed such that the CPU controls and operates according to a program stored in the memory of the control device 18.

That is, in the present invention, when the power failure occurs, the granular material G is prevented from being pushed out to the transportation pipe 4 side by the residual pressure of the blow pot 1 to prevent the transportation pipe 4 from being blocked, while the power is restored (when the power is restored). At the same time, the residual pressure in the blow pot 1 is released to return it to the initial state, and the granular material G remaining in the transport pipe 4 is discharged and pressure-fed, and then the transport is controlled to start again, while At the end of the blow, the blower 1 and the transport pipe 4 are controlled so as to discharge all the granular material G remaining therein. Next, the processing procedure of the operation performed at the time of the above power failure and at the end of the transport. Will be described with reference to the flowcharts shown in FIGS. 3 and 4.

In the processing procedure at the time of power failure shown in FIG. 3, when it is first confirmed that a power failure has occurred in step S1, the operation of the compressor 8 is stopped in the next step S2, and further in the next step S3. All valves 3,1 including shut valve 7
3, 14 and 15 are closed so that the granular material G in the blow pot 1 is not extruded to the transport pipe 4 side.

Next, when the power is restored in step S4, the process proceeds to the next step S5, the power-on signal is held by the relay, and further the process proceeds to step S6 where the air vent valve 6 is opened for a certain period of time by the timer, and the blow pot 1 The residual pressure inside is discharged and returned to the initial state.

Further, in step S7, the air knife valve 14 is opened,
Pressure gas is supplied to the air knife 5 according to the re-operation of the compressor 8, and the granular material G remaining in the transportation pipe 4 after the shut valve 7 is discharged and pressure-fed to reduce the load at the time of restart.

The discharge of the residual powder G by the air knife 5 is continued until the pressure gauge 17 detects the decrease in the pipe pressure.
When it is determined in S8 that the pressure inside the transportation pipe 4 has dropped to the set value, the process proceeds to the next step S9, and the other valves 7, 13, 15 that were closed are all opened, and at the last step S10. Transport is resumed.

On the other hand, at the end of transportation, as shown in the flowchart of FIG. 4, the seal gate 3, the air vent valve 6, and the shut valve 7 are closed, and the pressure valve 13 is opened in step S15, so that the blow pot 1
The internal pressure is increased to, for example, ² to 4 kgf / cm ² , and after that, by opening the shut valve 7 in step S17, the granular material G remaining in the blow pot 1 and the transport pipe 4 at that pressure is opened. To discharge at high speed. In addition, the wind velocity in the pipe during this discharge pressure feeding is approximately 50 to 60 m / s.

〔effect〕

Since the high-pressure transportation apparatus for powder and granules according to the present invention is as described above, the shut valve is closed to prevent the powder and granules from being extruded into the transportation pipe in the event of a power failure. Also, when the power failure is restored, the residual pressure in the blow pot is released to return it to the initial state, and the powder particles remaining in the transport pipe are discharged and pressure-fed by the air knife, so the load at restart is reduced and re-transportation is possible. It is possible to do smoothly.

In addition, since all powders and granules remaining in the blow pot and transport pipe are discharged at the end of transportation, different types of powders and granules will not be mixed during the next transportation, and a certain amount of powders or granules will be weighed. When transporting, it is possible to solve the problem that residual powder and granules are mixed with the measured powder and granules to increase the amount, or conversely, they remain in the blow pot or transport pipe and are reduced in weight. Effect is extremely high.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of a high-pressure transportation apparatus for powder and granules according to the present invention, FIG. 2 is a block diagram showing an electrical configuration of its control unit, and FIGS. 3 and 4 are It is a flow chart explaining the processing procedure at the time of a power failure and the end of transportation. 1 is a blow pot, 3 is a seal gate, 4 is a transport pipe, 5
Is an air knife, 6 is an air vent valve, 7 is a shut valve, 8 is a compressor, 13 is a pressure valve, 14 is an air knife valve, 18 is a control device, and G is a granular material.

Claims (2)

[Scope of utility model registration request] 1. A powdered material contained in a blow pot is transported by supplying pressurized gas to a blow pot, a transport pipe connected to a lower end opening of the blow pot, and an air knife provided in the middle of the transport pipe. In a device configured to carry out plug transport through a pipe, a shut valve is attached to the transport pipe on the front side of the air knife, and an air vent valve is attached to the blow pot. For the control device that opens and closes the vent valve,
When a power failure occurs, the shut valve is closed, when the current is restored, the air vent valve is opened for a certain period of time, and pressurized gas is sent to the air knife to transport the powder particles remaining in the transport pipe. A high-voltage transportation device for powder and granular material, which is provided with a power failure control means for opening and restarting transportation. 2. The transportation device according to claim 1, wherein a control device for opening and closing a shut valve attached to the transportation pipe temporarily closes the shut valve at the end of transportation.
After pressurizing the blow pot to a predetermined pressure, the shut valve is opened again to provide residual powder or granular material processing means for discharging and discharging the powder or granular material remaining in the blow pot and the transport pipe. High-pressure transportation device for powder and granules.