JPS5918290B2 - Method for controlling fixed position stopping of transferred objects in pipe transportation - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a control method for stopping an object at a fixed position when the object is transported in a pipe using air pressure or the like as a propulsion source.

In this type of so-called capsule transport, it is necessary to stop the traveling capsule at a predetermined position.

To stop the capsule, there are two ways to stop the capsule: use an uphill slope to reduce the inertia of the capsule, and install a hydraulic shock absorber at the stopping position to catch the capsule and stop it. The compressed air is used as a buffering force by the capsule entering the section pipe and the stopping section pipe closing part, and the capsule characteristic values (capsule weight, weight, A method is known in which the compressed air is controlled and stopped at a fixed position based on the air leakage rate, running resistance coefficient, stop zone entry speed, and the like.

However, with the former method, there are problems such as the shock absorber is large and complex, maintenance factors increase, and it is expensive, while the latter method also requires various equipment to measure characteristic values. There are some problems.

This invention was proposed to solve the above-mentioned conventional problems, and its purpose is to provide a control method that can easily and reliably stop a capsule at a fixed position without measuring the characteristic values of the capsule. It is in.

In the control method according to the present invention, a suction machine such as a blower capable of sucking air in the pipe is provided on the downstream side of the stop section pipe provided in the middle of the transport pipe or at the end of the transport pipe, and the capsule is stopped. The position of the capsule is detected after a certain period of time has elapsed since it entered the section pipe, and the suction amount of the suction machine is controlled based on this detected position to stop the capsule at a fixed position. be.

The present invention will be described below based on an illustrated embodiment.

1 is a stop section pipe provided in the middle of the transport pipe by a gate valve 2 and an air discharge port 3, and a gate valve 2 is provided on the downstream side of the pipe.
A blower 5 is provided through a duct 6 so as to suck air between the capsule vehicle 4 and the capsule vehicle 4 that has entered the vehicle.

D is a position detector such as a phototube, which is installed at the air outlet 3 and detects the entry of the capsule vehicle 4.

Dl, D2. D3... are position detectors such as phototubes arranged in large numbers along the conduit 1 at predetermined intervals from the position detectors, and detect the position of the capsule vehicle 4.

This position detector D0. D2. D3. . . . are AND gates G1. G2. G3. . G3.・・・・・・
It is connected to the.

That is, when the capsule vehicle 4 enters the stop section conduit 1, the position detector 177 is activated.

After a certain period of time has elapsed, it is output to each AND gate.

Then, the position detector D1. D2. D3. one or more of ... sends a detection signal to its AND gate,
The signal of this AND gate is input to the position discriminator 8.

As a result, the position of the capsule vehicle 4 after a certain period of time has passed is detected.

The position of the capsule vehicle 4 is input to the suction amount setter 9, and a set value corresponding to this position is input to the flow rate controller 10, thereby adjusting the suction amount of the blower 5.

11 is a flow rate regulating valve such as a butterfly valve; 12 is a flow meter such as an orifice or venturi; together with the flow rate regulator 10, a flow rate control loop is configured.

In the above configuration, after a certain period of time has elapsed since entering the stop section pipeline 1, the capsule vehicle will be located at various positions depending on its characteristic values. By the suction of the blower 5, the capsule vehicle moves at a constant speed from the above-mentioned position to the target fixed position and then stops.

For example, if a capsule is heavy and has a high leakage rate, the distance traveled within the stop section pipeline after a certain period of time has elapsed is also long, and the suction amount of such a capsule vehicle must be increased.

Note that some capsule vehicles may be stopped after a certain period of time has elapsed, so the blower 5 needs to have a capacity that can start a stopped capsule vehicle.

As described above, according to the present invention, the position of the capsule vehicle after a certain period of time has passed after entering the stop section pipeline is detected, and the suction amount of the blower is controlled based on this detected position to move the capsule vehicle by suction. Therefore, various capsule vehicles can be reliably stopped in a fixed position with a simple device without measuring the characteristic values of the capsule vehicle.

Furthermore, since the capsule vehicle is moved by suction, there is an advantage that it does not affect the following capsule vehicles in any way.

[Brief explanation of drawings]

The drawing is a block diagram of a control system used in the control method according to the present invention. 1...Stop section pipe line, 2...Gate valve,
3...Air release port, 4...Capsule
Both, 5...Blower, 6...Duct, 1
...Timer 1.8 ...Position discriminator, 9
...Suction amount setting device, 10...Flow rate controller, 11...Flow rate adjustment valve, 12...Flowmeter, D, Dl, D2゜D3 ...position detector,
G1. G2. G3...AND gate.

Claims (1)

[Claims] 1. In pipe transportation in which objects are transported using the flow of fluid in the pipe as a driving force, a suction machine capable of sucking the fluid in the stop section pipe is provided on the downstream side of the stop section pipe, and the transported object is stopped. Detecting the position of the transferred object after a certain period of time has elapsed since it entered the section pipe, and controlling the suction amount of the suction machine based on the detected position so that the transferred object stops at a fixed position. A method for controlling fixed position stopping of transferred objects in pipe transportation.