JPH01271305A - Anti-clogging method for storing/discharging machine - Google Patents

Abstract

PURPOSE:To eliminate clogging automatically, in a machine for discharging garbage pneumatically, by closing a gate valve for a predetermined time and opening abruptly when a transport pipe is clogged with the garbage and the inner pressure drops below a predetermined level thereby producing an impact air. CONSTITUTION:When garbage is fed from a hopper 3 through a screw feeder 6 to a transport pipe 10, air intrudes only through a gate valve 15 upon clogging of a plate valve 13 thus dropping the pressure in the transport pipe 10. The pressure drop is detected through a detector not shown. The gate valve 15 is closed for a predetermined time when the pressure in the transport pipe 10 drops below a predetermined level. Consequently, the pressure in the transport pipe 10 is farther lowered through suction of a blower 14. Then the gate valve 15 is opened abruptly to produce an impact air flow in the transport pipe 10 thus eliminating clogging of the plate valve. By such arrangement, clogging can be eliminated automatically.

Description

Detailed Description of the Invention A4 Object of the Invention (1) Industrial Application Field The present invention relates to a storage IJi1 outlet (7) for discharging M'' stored in a hopper through a transport pipe connected to a blower. In particular, the present invention relates to a method for preventing clogging of this storage/discharge machine with garbage.

(2) Conventional technology In the past, in order to efficiently process large amounts of garbage discharged from high-rise buildings, garbage was temporarily stored in a hopper installed in a ground room, etc., and this garbage was transferred to a transport pipe. A storage and discharge machine is used that discharges garbage to a garbage transport vehicle through a hopper.The storage and discharge machine supplies garbage into a transport pipe by a screw feeder installed at the bottom of a hopper, and the air in this transport pipe is passed through a blower. The dust is discharged along with the air by suction.

By the way, since the garbage processed by the storage and discharge machine mentioned above is a mixture of substances of various shapes, it often becomes clogged in the storage and discharge machine, making it impossible to discharge it.
It had some problems. For this purpose, the screw feeder installed in the storage and discharge machine is made to be able to rotate in both forward and reverse directions, and when a blockage occurs, the screw feeder is rotated in the reverse direction for a certain period of time, and after loosening the blockage, the screw feeder is rotated again. - A method of reversing the blockage by rotating the feeder in the normal direction has been proposed.

(3) Problems to be solved by the invention However,
When the degree of occlusion is significant, there have been cases where the occlusion cannot be cleared even by using the above-mentioned method of reversing the screw feeder. In such a case, the only option is to open the lid of the load cell section located at the end of the slurry 1 feeder and manually remove the clogged garbage, which is extremely dirty due to the foul odor and dirt of the garbage. It was difficult.

The present invention has been made in view of the above-mentioned circumstances, and it provides a storage and discharge machine that can automatically clear the blockage without manual intervention even if the storage and discharge machine becomes severely clogged. The technical challenge is to provide a method for preventing blockages.

B0 Structure of the Invention (1) Means for Solving the Problems In order to solve the problems described above, the method for preventing blockage of a storage discharger according to the present invention is to provide a trough in which a screw feeder is installed in a row at the bottom of a hopper. In a storage discharge machine, which connects an extrusion port of a trough and a transport pipe connected to a blower via a plate valve, and is provided with an on-off valve for introducing secondary air into the upstream side of the transport pipe; When the pressure in the transport pipe drops below a predetermined value due to blockage of the dust stored in the pipe, the on-off valve is closed for a certain period of time and then suddenly opened, and the impact air flow generated at that time removes the blockage. It is characterized by sucking into the transport pipe.

(2) Effect The method for preventing blockage of a storage discharger according to the present invention having the above-mentioned configuration is such that when a blockage occurs at the plate valve in the gap where the garbage in the hopper is fed to the transport pipe by the screw feeder,
The air that was previously taken in through both the plate valve and the on-off valve is now only taken in through the on-off valve, and the pressure inside the transport pipe decreases. When this pressure drop is detected, the on-off valve is closed, and the pressure inside the sealed transport pipe is further reduced by the suction action of the blower. If the on-off valve is suddenly opened in this state, air will suddenly flow into the transport pipe, and the dust that has clogged the plate valve will be sucked into the transport pipe by the impact of the air flow.

(3) Example Hereinafter, an example of the method for preventing blockage of a storage discharger according to the present invention will be described based on the drawings.

FIG. 1 is a diagram showing the overall structure of the storage and discharge machine.
A popper 3 for storing garbage is provided at the upper end of the container. This hopper 3 is a box-shaped container tapered downward, and a dust sheet 4 for guiding garbage dropped from the upper floors is connected to an opening 3a at the top. - On the other hand, inside the trough 5 installed horizontally at the bottom of this hopper 3, there is a two-shaft screw feeder 6.
is installed, and the driving force of the motor 8 attached to the support plate 7 on the pillars 2b, 2b erected on the floor 1 is transmitted via the reducer 9, and the screw feeder 6 is rotated in both forward and reverse directions. It is designed to be driven.

The extrusion port 5a of the trough 5 and the transport pipe 10 arranged along the floor surface 1 are connected by a connecting pipe 11 extending in the vertical direction, and a cylinder 1 is connected to the end of the connecting pipe 11.
A plate valve 13 which is driven to open and close by the valve 2 is installed. A blower 14 is connected to the downstream side of the transport pipe 10, and the blower 14 generates an air flow for sucking the dust supplied by the screw feeder 6.
An on-off valve, ie, a butterfly valve 15, for introducing secondary air to assist in the transportation of garbage is attached to the second flow end of the valve 15 so as to be openable and closable by a cylinder 16.

Further, a level meter 17 is installed near the extrusion port 5a of the trough 5 to detect the empty state of the hopper 3 using t-magnetic waves.
A pressure gauge 18 for detecting the clogging state of the garbage is installed downstream of the filter.

Next, the operation of one embodiment of the method for preventing blockage of a storage discharger according to the present invention having the above-mentioned configuration will be explained based on the flowchart of FIG. 2.

Following the start of terminal 19, butterfly valve 1 is activated in process 20.
5 is in a half-open state, and in process 21, the plate valve 13 is in a fully open state,
In process 22, the screw feeder 6 enters a normal rotation state.

Then, the dust in the hopper 3 is transferred to the screw feeder 6.
The liquid is transported along the trough 5 and extruded from the extrusion port 5a into the connecting pipe 11, and further passes through the plate valve 13 and is supplied to the transport pipe 10. The dust thus supplied into the transport pipe 10 is transferred to the butterfly valve 15 which is in a half-open state.
The air is transferred together with the secondary air introduced by the blower 14 and discharged to the outside. During the above-mentioned operation, the presence or absence of garbage in the trough 5 is constantly monitored by the level meter 17, and when the hopper 3 is empty and the level meter 17 is ONL, that is, if the judgment 23 becomes YES, Stopping the screw feeder 6 in process 24, process 25
The plate valve 13 is closed in step 26, and the butterfly valve 15 is closed in step 26.
is opened and ends at terminal 27.

On the other hand, if there is still garbage remaining in the hopper 3, that is, if the result of judgment 23 is NO, then in judgment 28, the pressure detected by the pressure gauge 18 installed in the transport pipe IO; The screw feeder 6 and butterfly valve 15 are controlled accordingly.

In other words, if P>-100, the load is light, so process 2
At 9, the speed of the screw feeder 6 is increased, and the amount of garbage supplied to the transport pipe 10 is increased.

Further, when the value of P is a proper value, i.e., -1OO≧P≧−300, the operation of the screw feeder 6 is continued in the same state in process 30.

Further, if P<-300, the load is heavy, so in judgment 31 a comparison is made with the reference pressure P--500. Then, if -300>P>-500, process 32
At this point, the screw feeder 6 is decelerated, and the amount of garbage supplied to the transport pipe 10 is reduced. On the other hand, P≦−500
In this case, it is determined that a blockage has occurred, and in step 33, the screw feeder 6 is reversed for 10 seconds. As a result, in judgment 34, the comparison with the reference pressure P=-500 is performed again, and if P>-500 has returned, it is judged that the blockage has been resolved, and in process 35, the screw feeder 6 starts rotating normally again. be returned. If the - direction P≦-500 remains, it is determined that the blockage has not been resolved, and the blockage prevention method that is the gist of the present invention is executed.

That is, in judgment 36, a comparison is made to see if the number of executions n, which will be described later, is 3. If NO, the butterfly valve 15 is closed in process 37, and the pressure inside the transport pipe 10 is further increased by the suction force of the blower 14. lower. Then, when it is confirmed in judgment 38 that 10 seconds have elapsed, in process 39 the butterfly valve 15 is fully opened. Then, atmospheric air impulsively flows into the low-pressure transport pipe 10, and the suction force generated by the flow removes the dust blocking the plate valve 13. When it is confirmed in the judgment 40 that 10 seconds have passed since the butterfly valve 15 was released,
In process 41, the butterfly valve 15 is returned to the normal half-open state, and in process 42, 1 is added to the number of executions n, and n+
After setting it to 1, the above-described judgment 34 and subsequent steps are repeated again.

At this time, if P>-500 in judgment 34, the blockage was resolved in the first execution, and processing 3
However, if P≦−500 in judgment 34, it means that the blockage is still not resolved.
Repeat the opening/closing operation of the butterfly valve 15 from step 37 onwards as the number of executions n-2, and if P≦-500 in judgment 34 after the second execution is completed,
In judgment 36, n=3 becomes YES, and it is determined that the blockage cannot be cleared.In process 45, an alarm buzzer is activated, and in process 46, the apparatus is stopped, and terminal 45 indicates the end.

Incidentally, as shown by the chain line in FIG. 1, an auxiliary butterfly valve 15' for auxiliary introduction of secondary air into the transport pipe 10 may be provided at the upper part of the connecting pipe 11.

Although the embodiments of the method for preventing blockage of a storage discharger according to the present invention have been described in detail above, the present invention is not limited to the embodiments described above, and various small design changes can be made.

For example, it is not always necessary to reverse the screw feeder when a blockage occurs, and it is also possible to directly open and close the butterfly valve, and the number of times the butterfly valve can be opened and closed if the blockage is not resolved is not limited to two. , it is possible to set the number of times as appropriate. Also, other valves with the same effect may be used in place of the butterfly valve.

Effects of the C0 Invention According to the method for preventing blockage of a storage discharger of the present invention described above, a trough equipped with a screw feeder is installed in a row at the bottom of a hopper, and the extrusion port of the trough and the transport pipe connected to the blower are connected to a plate. In a storage/discharge machine that is connected via a valve and is provided with an on-off valve that introduces secondary air into the upstream side of the transport pipe, when the pressure in the transport pipe drops below a predetermined value due to blockage of garbage, the on-off valve is connected via a valve. After the valve is closed for a certain period of time, it is suddenly opened, and the resulting shock air flow sucks the clogged debris into the transport pipe, so the problem can also be solved using the conventional method of reversing the screw feeder. Severe blockages that could not be removed can now be effectively cleared, and there is no need to carry out difficult manual removal work.

[Brief explanation of the drawing]

FIG. 1 is an overall view of an embodiment of the method for preventing blockage of a storage/discharge machine according to the present invention, and FIG. 2 is a flowchart illustrating its operation. 3... Hopper, 5... Trough, 5a... Extrusion port, 6... Screw feeder, 10... Transport pipe,
13...Plate valve, 14...Proa, 15...
Open/Close Valve (Butterfly Valve) Patent Applicant: Kendo Ochiai, Agent Patent Attorney, ShinMaywa Industries Co., Ltd. 1) Takahide Naka Procedural Amendments from Counties) Showa 63. #October 18th

Claims (1)

[Claims] [1] A screw feeder (
6) are installed in series, and the troughs (5)
A transport pipe (
10) via a plate valve (13) and an on-off valve (15) for introducing secondary air into the upstream side of the transport pipe (10); When the pressure inside the transport pipe (10) drops below a predetermined value due to blockage of dust stored in the pipe, the on-off valve (15) is closed for a certain period of time and then suddenly opened, causing a shocking air flow to occur. A method for preventing blockage of a storage/discharge machine, characterized by sucking the clogged garbage into a transport pipe (10). [2] The [1st method] is characterized in that the closing/opening operation of the on-off valve (15) is performed continuously until the blockage of the garbage is cleared.
] Method for preventing blockage of storage and discharge machine described in section. [3] The storage and discharge system according to item [2], which is characterized in that if the blockage of garbage is not cleared even after repeating the closing and opening operations of the on-off valve (15) twice, an alarm is issued and the operation is stopped. How to prevent machine blockage.