JPH08295415A - Pneumatic carrying device - Google Patents

Abstract

PURPOSE: To provide a pneumatic carrying device which is suitable for long- distance feed of low water inclusion matter such as mud and soil in which continuous carrying work is possible at high efficiency without generating jet of compression air to the external by biting of subject matter. CONSTITUTION: A tube pump mechanism 4 is provided in a continuity passage 5 between a hopper 1 containing subject matter and a pneumatic conduit 3, a starting end part of the pneumatic conduit 3 and an air compressor 8 are connected to each other by an air supply tube 7, so the subject matter fed by the tube pump mechanism 4 from the inside of the hopper 1 to the pneumatic conduit 3 is carried continuously to be discharged from a final end discharge port of the pneumatic conduit 3 by pressurized air from the air compressor 8 and pump action of the tube pump mechanism 4.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to an apparatus for pneumatically conveying mud and the like.

[0002]

2. Description of the Related Art Conventionally, a device such as that shown in FIG. 2 guides an object to be conveyed such as mud put into the hopper 11 to a pressure feeding pipe 13 by a screw conveyor 14a, and the hopper 11 and the pressure feeding pipe 13 are guided. And the compressed air is introduced into the pressure feeding pipeline 13 by closing the valve 14b between the pressure feeding pipeline 13 and the air compressor 18 and opening the valve 19 between the air compressor 18 and the pressure feeding pipeline 13. It was discharged from the end outlet.

However, in that case, since the next object cannot be taken in until the object to be conveyed in the pressure feeding conduit 13 is discharged from the terminal discharge port, the conveying work is intermittent and inefficient. Further, when the transported object is caught in the valve 14b, there may occur a trouble that the compressed air is ejected from the hopper 11 side to the outside.

[0004]

It is an object of the present invention to make it possible to carry out a continuous transfer operation with high efficiency, and to prevent compressed air from being blown to the outside due to the biting of a transferred object. An object of the present invention is to provide a pneumatic conveying device suitable for long-distance discharge of low water content.

[0005]

In the pneumatic conveying apparatus according to the present invention,
A tube pump mechanism is interposed in a conduction path between a hopper for containing an object to be conveyed and a pressure-feeding pipeline, and a pump rotation speed measurement sensor is attached to a delivery-side conduction path of the tube pump mechanism.
A motor-operated valve for introducing and controlling pressurized air and a pressure regulating valve for pressurized air are provided in an air supply pipe that connects the starting end of the pressure-feeding pipeline and the air compressor.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment will be described below with reference to FIG.

Reference numeral 1 denotes a hopper for temporarily storing a material to be conveyed such as mud, and a screen 2 for separating and removing a large solid material is attached to an opening portion of its upper surface. Three
Is a pressure-feeding conduit for transporting an object to be delivered to a predetermined location and discharging it from a terminal discharge port, and 4 is interposed in a conduction path 5 connecting a lower bottom portion of the hopper 1 and a starting end of the pressure-feeding conduit 3. A tube pump mechanism, 6 is a pump rotation speed measurement sensor attached to the delivery side conduction path 5b of the tube pump mechanism 4, and 7 is an air supply pipe connecting the starting end of the pressure supply pipe line 3 and the air compressor 8. A motor-operated valve 9a for controlling introduction of pressurized air and a pressure adjusting valve 9b for pressurized air are attached to the air supply pipe 7, and a gauge 10 is interposed between both valves 9a and 9b.

[0008]

[Operation] When the tube pump mechanism 4 is driven, the hopper 1
The mud inside is sent into the pressure-feeding pipeline 3. Then, the mud sent into the pressure feeding pipe line 3 is carried to a predetermined place by the pressurized air from the air compressor 8 and the pumping action of the tube pump mechanism 4, and is discharged from the terminal discharge port. The action of feeding the mud by the tube pump mechanism 4 is such that the roller 4r is the tube 5 of the conduction path 5.
Since it is performed while handling c, it plays a role of a check valve, so that the check valve 14b as in the conventional case is not necessary, and therefore, the problem of jetting compressed air due to biting of mud does not occur. Further, since the tube pump mechanism 4 belongs to a fixed-quantity type pump, the amount of mud sent to the pressure-feeding pipeline 3 is measured by the measurement sensor 6, and the pressurized air from the air compressor 8 is supplied at an appropriate time by opening and closing the electric valve 9a. By assisting the feeding action of the mud by the tube pump mechanism 4, the load on the tube pump mechanism 4 can be reduced and the mud can be transported over a long distance. Further, the pressure control of the pressurized air required for the transportation is set by the pressure adjusting valve 9b. Since the pumping pressure of the tube pump mechanism 4 is higher than the pressure of the pressurized air from the air compressor 8, the hopper 1 can be operated while continuing the introduction of the pressurized air.
Mud can be taken into the pumping line 3 from the inside, and therefore, a continuous transfer operation of mud becomes possible.

[0009]

According to the present invention, since the object to be conveyed is fed from the hopper 1 into the pressure-feeding conduit 3 by the tube pump mechanism 4, a check valve as in the prior art is not required, and therefore, the check valve is not necessary. The problem that the compressed air is jetted to the outside due to the biting of the conveyed object does not occur. Further, by supplying the pressurized air from the air compressor 8, the load on the tube pump mechanism 4 can be reduced and the object to be conveyed can be conveyed over a long distance, and the compressed air can be continuously introduced into the pressure-feeding pipeline 3. There is an advantage that an efficient transfer operation can be performed by effectively taking in the transferred object.

[Brief description of drawings]

FIG. 1 is a pipe line configuration diagram in a pneumatic conveying device according to the present invention.

FIG. 2 is a pipe line configuration diagram in a conventional pneumatic conveying device.

[Explanation of symbols]

 1 Hopper 3 Pressure feeding conduit 4 Tube pump mechanism 5 Conducting passage 5b Delivery side conducting passage 6 Pump rotation speed measurement sensor 7 Air feeding pipe 8 Air compressor 9a Motorized valve for introduction control of pressurized air 9b Pressure adjusting valve for pressurized air

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Claims (1)

[Claims] 1. A tube pump mechanism is provided in a communication path between a hopper for accommodating an object to be conveyed and a pressure-feeding conduit, and a pump rotation speed measuring sensor is attached to the discharge-side communication path of the tube pump mechanism. A pneumatic conveying device comprising a motor-operated valve for controlling the introduction of pressurized air and a pressure regulating valve for pressurized air, which are arranged in an air supply pipe connecting a starting end of a pressure-feeding conduit and an air compressor.