JP2005111454A - Method and apparatus for cleaning internal face of hopper - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To clean an internal face of a hopper putting a ready-mixed concrete into a rotary drum of a concrete mixer truck without using washing water. <P>SOLUTION: In a cleaning method for an internal face of a hopper provided with an inlet and discharge port of the ready-mixed concrete for supplying the ready-mixed concrete into the rotary drum which is installed at the rear of the concrete mixer truck, this method is characterized by ejecting an airflow in the same direction along a feeding direction to the rotary drum of the ready-mixed concrete from the neighborhood of the inlet of the hopper, transferring the ready-mixed concrete deposited at the internal face of the hopper toward the rotary drum and discharging the ready-mixed concrete from the discharge port. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a cleaning method and an apparatus for an inner wall surface of a hopper provided in a concrete mixer truck or the like.

  2. Description of the Related Art Conventionally, there is a cleaning device for an inner wall surface of a hopper provided with a cement receiving port and a discharging port for guiding cement mixed with water such as ready-mixed concrete (for example, see Patent Document 1).

  This apparatus includes a washing water jet pipe having a jet head having a plurality of jet nozzles arranged radially, and a washing water jet pipe which is provided outside the hopper body and rotatably supports the washing water jet pipe. A moving device capable of reciprocating the cleaning water jet pipe so that the cleaning water jet pipe moves in and out of the hopper body, a rotary drive device provided in the moving device and capable of rotating the cleaning water jet pipe, and the cleaning A rotary joint connected to the rear end of the cleaning water injection pipe for connecting the water injection pipe to the high-pressure cleaning water supply source;

Japanese Unexamined Patent Publication No. 7-117231

  In the invention described in the above-mentioned patent document, water (washing water) is used to wash the inner wall of the hopper, but the washing water is mixed in the rotating drum in which the ready-mixed concrete is stored and is necessary for the ready-mixed concrete. As a result, water is mixed in, and the quality of the concrete may be deteriorated.

  In addition, if the ready-mixed concrete is discharged from the rotating drum and then washed with washing water, the quality of the concrete is avoided, but after the ready-mixed concrete is supplied to the rotating drum through the hopper, the ready-mixed concrete is discharged from the rotating drum. In addition, the cement component of ready-mixed concrete hardens and cannot be easily removed with washing water.

  Therefore, if the concrete that has adhered to the hopper and hardened is scraped with a spatula or the like, it can be peeled to some extent, but in this case, it is difficult to completely remove it, and the cost for the work becomes enormous. .

  Further, the peeled concrete may be bitten by the drive unit of the rotating drum and the machine part may be damaged, or mixed with new ready-mixed concrete to deteriorate the quality of the ready-mixed concrete.

  The present invention is intended to solve the above problems.

  1st invention is the cleaning method of the inner wall surface of a hopper provided with the receiving port and the discharge port of the cement for guiding the cement with which water was kneaded, In the cleaning method of the inner surface of the hopper, the air flow is generated from the same direction as the cement supply to the hopper. A cleaning method for a hopper inner wall surface, wherein the cement that has been injected and attached to the inner wall surface of the hopper is moved toward a cement discharge port and discharged.

  In the present invention, the air flow is injected from the same direction as the cement supply to the hopper, and the cement adhering to the inner wall surface of the hopper is moved toward the cement discharge port and discharged, so water is not used. The cement is removed from the hopper by the pressure of the airflow.

  2nd invention presupposes 1st invention, and the airflow is the cleaning method of the hopper inner wall surface which is an air flow injected by high pressure.

  In the present invention, since an air flow injected at a high pressure is used as an air flow, it can be used virtually inexhaustible.

  The third invention is based on the second invention, and the air flow is 2 kg /? This is a method for cleaning the inner wall surface of a hopper injected with the above pressure.

  In the present invention, 2 kg /? Since the air flow at the above pressure is used, the cement adhering to the inner wall surface of the hopper can be reliably removed.

  4th invention is provided in the rear part of a concrete mixer truck, In the method of cleaning the inner wall face of the hopper provided with the receiving port and discharge port of ready-mixed concrete for supplying ready-mixed concrete in a rotating drum , From near the entrance of the hopper, air current is injected in the same direction as the direction of supply of the ready-mixed concrete to the rotating drum, and the ready-mixed concrete attached to the inner wall surface of the hopper is moved toward the rotating drum, It is the cleaning method of the inner wall surface of a hopper characterized by discharging from a discharge port.

  In the present invention, air current is injected from the vicinity of the hopper receiving port in the same direction as the supply direction of the ready-mixed concrete to the rotating drum, and the ready-mixed concrete adhering to the inner wall surface of the hopper is moved toward the rotating drum. Therefore, all the ready-mixed concrete adhering to the inner wall surface of the hopper is supplied into the rotating drum, and water is not used at this time, so water is not supplied to the rotating drum.

  According to a fifth aspect of the present invention, there is provided a cleaning device for a hopper inner wall surface provided with a cement receiving port and a discharging port for guiding cement mixed with water, and in the vicinity of the receiving port to the hopper, a cement supplying direction is provided. A cleaning device for an inner wall surface of a hopper, which is provided with an air current injection means for injecting an air stream from the same direction and moving cement adhering to the inner wall surface of the hopper toward a cement discharge port. is there.

  In the present invention, the air flow is injected from the same direction as the cement supply to the hopper, and the cement adhering to the inner wall surface of the hopper is moved toward the cement discharge port and discharged, so water is not used. The cement is removed from the hopper by the pressure of the airflow.

  6th invention presupposes 5th invention, and the airflow is a cleaning apparatus of the inner wall surface of a hopper which is an air flow injected by high pressure.

  In the present invention, since an air flow injected at a high pressure is used as an air flow, it can be used virtually inexhaustible.

  The seventh invention is based on the sixth invention, and the air flow is 2 kg /? It is a cleaning device for the inner wall surface of a hopper injected with the above pressure.

  In the present invention, 2 kg /? Since the air flow at the above pressure is used, the cement adhering to the inner wall surface of the hopper can be reliably removed.

  The eighth invention is based on the sixth or seventh invention, and a pipe is disposed along the periphery of the receiving port, and a compressed air supply source is connected to the pipe. The hopper inner wall surface cleaning device is provided with an orifice for injecting air in a direction in which cement is moved toward the discharge port along the inner wall surface of the hopper.

  In the present invention, a pipe is disposed along the periphery of the receiving port, and a compressed air supply source is connected to the pipe, and the cement is directed to the discharge port along the inner wall surface of the hopper on the side wall of the pipe. Since the orifice for injecting air in the moving direction is established, it is possible to remove the cement entrusted to the inner wall surface of the hopper simply by supplying the compressed air from the compressed air supply source to the pipe. it can.

  9th invention is a cleaning apparatus of the inner wall surface of a hopper provided in the concrete mixer truck on the premise of invention of 5th thru | or 8th.

  In the present invention, since the concrete mixer truck is provided with a cleaning device, it is possible to mount the ready-mixed concrete on the concrete mixer truck and clean the inner wall surface of the hopper before leaving.

  In the present invention and the following invention, the concrete mixer truck includes an agitator truck.

  A tenth aspect of the invention is a concrete mixer truck, wherein a hopper inner wall surface cleaning device according to any of the sixth to ninth aspects of the invention is provided, and the air injection means is connected to a compressed air tank for an air brake. It is characterized by being.

  Large automobiles such as concrete mixer trucks are generally equipped with an air compressor for air brakes, so when using the air compressor, the removal work of ready-mixed concrete takes place wherever the concrete mixer truck is located. Can be performed.

  In the first aspect of the invention, air is injected from the same direction as the cement supply to the hopper, and the cement adhering to the inner wall surface of the hopper is moved toward the cement discharge port and discharged, so use water. At least the cement is removed from the hopper by the pressure of the airflow.

  Therefore, extra water is not supplied to the cement to be used, and there is no possibility of reducing the quality of sick or concrete using the cement.

  In addition, it is possible to completely remove the cement adhering to the inner wall surface of the hopper, and the cost can be greatly reduced.

  In the second invention, since an air flow injected at a high pressure is used as an air flow, it is practically inexhaustible, and the cost of a consumable material (air) is free, compared with the case of using washing water. The cost is much cheaper.

  In the third invention, 2 kg /? Since the air flow at the above pressure is used, the cement adhering to the inner wall surface of the hopper can be reliably removed.

  In the fourth aspect of the invention, air current is injected from the vicinity of the hopper receiving port in the same direction as the supply direction of the ready-mixed concrete to the rotating drum, and the ready-made concrete adhering to the inner wall surface of the hopper is directed to the rotating drum. Since all the ready-mixed concrete adhering to the inner wall surface of the hopper is supplied into the rotating drum, and no water is used at this time, water is not supplied to the rotating drum. Absent.

  Therefore, extra water is not supplied to the cement to be used, and there is no possibility of reducing the quality of sick or concrete using the cement.

  In addition, it is possible to completely remove the cement adhering to the inner wall surface of the hopper, and the cost can be greatly reduced.

  In the fifth aspect of the invention, air is injected from the same direction as the cement supply to the hopper, and the cement adhering to the inner wall surface of the hopper is moved toward the cement discharge port and discharged, so use water. At least the cement is removed from the hopper by the pressure of the airflow.

  Therefore, extra water is not supplied to the cement to be used, and there is no possibility of reducing the quality of sick or concrete using the cement.

  In addition, it is possible to completely remove the cement adhering to the inner wall surface of the hopper, and the cost can be greatly reduced.

  In the sixth invention, since an air flow injected at a high pressure is used as an air flow, it can be used virtually inexhaustively, and the cost of a consumable material (air) is free, compared with the case of using washing water. The cost is much cheaper.

  In the seventh invention, 2 kg /? Since the air flow at the above pressure is used, the cement adhering to the inner wall surface of the hopper can be reliably removed.

  In the eighth invention, a pipe is disposed along the periphery of the receiving port, a compressed air supply source is connected to the pipe, and a cement is discharged to the side wall of the pipe along the inner wall surface of the hopper. Since the orifice for injecting the air in the direction of moving toward is established, simply supplying the compressed air from the compressed air supply source to the pipe removes the cement entrusted to the inner wall surface of the hopper be able to.

  Therefore, it is not necessary for the operator to hold the air gun and bring the air jet into contact with the inner wall surface of the hopper, and the cement deposited on the inner wall surface of the hopper can be automatically removed.

  In the ninth aspect, since the concrete mixer truck is provided with a cleaning device, it is possible to mount the ready-mixed concrete on the concrete mixer truck and clean the hopper inner wall surface before leaving.

  Therefore, the inner wall surface of the hopper can be cleaned very easily.

  In the tenth aspect of the invention, a large-sized automobile such as a concrete mixer truck is generally equipped with an air compressor for an air brake. Therefore, when the air compressor is used, where the concrete mixer truck is located. In addition, it is possible to perform the removal work of the ready-mixed concrete even during traveling.

  Therefore, it is only necessary to provide a pipe and a valve as the apparatus, and the apparatus can be manufactured at a very low cost.

  An embodiment of the present invention will be described with reference to FIGS.

  1 is a side view of the concrete mixer truck, FIG. 2 is a plan view of the concrete mixer truck, and FIG. 3 is a longitudinal sectional view of the hopper.

  1 and 2, the concrete mixer truck described here is a well-known one. A tire 2 is attached to the lower part of the carriage 1, and a cab 3 is provided in front of the truck 1. A rotating drum 4 that conveys raw concrete while being kneaded is rotatably mounted in the vicinity of the section.

  Further, a tapered hopper 6 whose upper side is expanded is fixedly installed obliquely above the opening 5 of the rotating drum 4 so as to put ready concrete into the rotating drum 4 from the opening 5.

  An air compressor for operating an air brake and an air tank 7 for temporarily storing compressed air are provided below the cab 3, and a compressed air supply source is provided by the air compressor and the air tank 7. Is configured.

  As shown in FIG. 3, the hopper 6 is provided with a fresh concrete receiving port 8 and a discharge port 9 for guiding the ready-mixed concrete (the ready-mixed concrete flows in the direction of the bold arrow).

  A pipe 10 for delivering compressed air is disposed on the periphery of the receiving port 8 of the hopper 6. A plurality of orifices (small holes) 11.

  The orifices 11 are provided so as to inject air in a direction in which the ready-mixed concrete 12 attached to the inner wall surface of the hopper 6 is moved toward the discharge port 9.

  The pipe 10 is connected via a valve of the air tank 7. When the valve is opened, the compressed air in the air tank 7 becomes an air flow and is injected from the orifices 11 ... of the pipe 10, When the valve is closed, the air flow injected from the orifices 11 ... stops.

  Accordingly, when the driver or the like appropriately operates the valve, the ready-mixed concrete 12 attached to the inner wall surface of the hopper 6 moves from the discharge port 9 of the hopper 6 toward the opening 5 of the rotating drum 4 and rotates. The drum 4 is housed inside.

  In this case, since no washing water is used, no extra water is introduced into the rotating drum 4 and there is no possibility of deteriorating the quality of the ready-mixed concrete inside.

It is a side view of a concrete mixer truck concerning one embodiment of the present invention. It is a top view of the concrete mixer truck concerning one embodiment of the present invention. It is a longitudinal cross-sectional view of the hopper which concerns on one embodiment of this invention.

Explanation of symbols

1 trolley 2 tire 3 cab 4 rotating drum 5 opening 6 hopper 7 air tank 8 receiving port 9 discharging port 10 pipe 11 orifice 12 ready-mixed concrete

Claims (10)

In the cleaning method of the inner wall surface of the hopper provided with a cement receiving port and a discharging port for guiding the cement mixed with water,
A method for cleaning an inner wall surface of a hopper, wherein an air flow is injected from the same direction as a cement supply direction to the hopper, and the cement adhering to the inner wall surface of the hopper is moved toward a cement discharge port and discharged. .   The hopper inner wall surface cleaning method according to claim 1, wherein the air flow is an air flow injected at a high pressure.   Air flow is 2kg /? The hopper inner wall surface cleaning method according to claim 2, wherein the hopper inner wall surface is sprayed at the above pressure. In a method for cleaning an inner wall surface of a hopper provided with a ready-mixed concrete inlet and outlet for supplying ready-mixed concrete into a rotating drum, provided at the rear of a concrete mixer truck,
From the vicinity of the inlet of the hopper, an air flow is injected in the same direction as the direction of supply of the ready-mixed concrete to the rotating drum, and the ready-mixed concrete adhering to the inner wall surface of the hopper is moved toward the rotating drum to be discharged. A method for cleaning an inner wall surface of a hopper, characterized by discharging from an outlet. In the cleaning device for the inner wall surface of the hopper provided with a cement receiving port and a discharging port for guiding the water-mixed cement,
Airflow injection means for injecting airflow from the same direction as the cement supply direction to the hopper and moving the cement adhering to the inner wall surface of the hopper toward the cement discharge port is provided near the inlet. A cleaning device for a hopper inner wall surface.   The hopper inner wall surface cleaning device according to claim 5, wherein the air flow is an air flow jetted at a high pressure.   Air flow is 2kg /? The hopper inner wall surface cleaning apparatus according to claim 6, wherein the hopper inner wall surface is sprayed at the above pressure.   A pipe is arranged along the periphery of the receiving port, and a compressed air supply source is connected to the pipe, and the side wall of the pipe moves the cement along the inner wall surface of the hopper toward the discharge port. The hopper inner wall surface cleaning apparatus according to claim 6 or 7, wherein an orifice for injecting air is provided.   The hopper inner wall surface cleaning device according to any one of claims 5 to 8, which is provided in a concrete mixer truck.   A concrete mixer truck, wherein the hopper inner wall surface cleaning device according to any one of claims 6 to 9 is provided, and the air injection means is connected to a compressed air tank for an air brake. A featured concrete mixer truck.

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