JPS5848444B2 - In-pipe transport device using forced air flow - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an intra-pipe transport device configured to forcibly move a cargo carrier along a pipe using forced airflow generated within the pipe as a thrust source.

The most efficient means of propelling cargo transport carts with this type of intra-pipe transportation device is the pressure-feeding type or suction type, which installs a pump at the end of the pipe and utilizes the total pressure. .

However, as the length of the pipe becomes longer, the thrust of the pump installed at the end becomes insufficient, so it is necessary to increase the thrust of the forced air flow in the middle of the pipe.

As a measure for this purpose, there are two methods: a jet booster pump 3 installed in the middle of the pipe that sucks in water from inside the pipe and discharges it into the pipe (see Figure 3); It has been considered that a booster pump 3 for discharging is provided, and a valve 4 that can be opened and closed freely with respect to the pipe is attached to the pipe on the discharge port 3a side of the booster pump 3 (see Fig. 4). A comparison between the two shows that when the valve 4 is in the position of blocking the pipeline, suction can be performed at the suction port 3b side and pressure feeding can be performed at the discharge port 3a side using the full pressure. In addition, when the valve 4 is in the position of opening the pipe, the latter has the same function as the former pump, and is more efficient, especially when transporting heavy objects. It's practical.

However, when using such a booster pump with a valve, the valve installed on the discharge port side can be opened and closed without coming into contact with the running truck and damaging the truck or the valve itself.
It is required that the valve opens and closes safely and accurately, and that the opening time of the valve is as short as possible.

A valve opening/closing device that is generally considered to meet these requirements is a combination of a bogie position detector and an electric motor, hydraulic, or pneumatic equipment; If one or both of them fail, the truck will definitely crash into the valve, causing damage to the truck and the valve.

In view of the above-mentioned circumstances, an object of the present invention is to provide an airflow-utilizing intra-pipe transportation device that can accurately open and close the valve in the valved booster pump without causing the above-mentioned inconveniences. has.

Embodiments of the present invention will be described in detail below based on the drawings.

Reference numeral 1 denotes a pipe installed using a space under an elevated structure, and reference numeral 2 indicates a pressure receiving plate 6 having an area smaller than the cross-sectional area of the pipe 1, which slides into contact with the inner wall of the pipe 1. This is a cargo transporting truck that has movable running wheels 7 and collision mitigation devices 8 that protrude in the front and rear directions. The system uses the generated forced airflow as a thrust source to move along the axial direction of the pipe 1, and absorbs air from inside the pipe 1 midway through the pipe 1. A booster pump 3 that discharges water into the pipe 1 is installed in a bypass manner, and the peripheral wall 9 of the pipe 1 portion located between the inlet 3b and the discharge 13a of the booster pump 3 has an oscillating structure with respect to the pipe 1. The booth coupon 3 is equipped with a valve 4 that can be opened and closed movably and has approximately the same cross-sectional area as the cross-sectional area of the pipe 1.
On the upstream side of the conduit 1 in the conveyance direction, there are pressure detection pipes 10a and 10b for detecting the pressure before and after the cargo carrier 2, and pressure detection pipes 10a and 10b are connected to the pressure detection pipes 10a and 10b to detect the pressure before and after the cargo carrier 2. A valve opening mechanism 5A consisting of an air cylinder 11 that operates to open the valve 4 by the differential pressure when the pressure exceeds a certain level is provided, and on the downstream side in the conveyance direction, a valve opening mechanism 5A is provided that controls the pressure before and after the cargo carrier 2. Air is connected to the force detection tubes 10c and 10d to be detected and the force detection tubes 10c and 10d, and is operated to close the valve 4 by the pressure difference between the front and rear of the truck 2 when the pressure difference reaches a certain level or more. A valve closing mechanism 5B including a cylinder 11 is provided.

The operation of the forced airflow intra-pipe transport device configured as above will be explained as follows.

First, between the pressure detection tubes 10a and 10b or 10c,
If there is no load carrier 2 between the pressure detection tubes 10d and 10d, the pressure difference between the pressure detection tubes 10a and 10d or between the pressure detection tubes 10c and 10d is generally small due to only the tube friction loss due to forced airflow.
The valve 4 continues to be in a closed state, and in this state, the booth coupon valve 3 uses the full pressure for suction on the suction side and pressure delivery on the discharge side to increase the thrust.

Next, when the combined vehicle 2 enters between the pressure detection tubes 10a and 10b, the pressure difference between the pressure detection tubes 10a and 10b becomes sufficiently large, and the valve 4 is automatically opened by the air cylinder 11. .

After that, when the truck 2 passes through the pump station and enters between the pressure detection tubes 10c and 10d, the pressure difference between the pressure detection tubes 10c and 10d becomes sufficiently large, and the valve 4 is automatically opened by the air cylinder 11. When passing through such a pump station, Jets 1
It has the same function as a pump.

In summary, the intra-pipe transport device using forced air flow according to the present invention includes a booster pump 3 installed midway in the pipe 1 for sucking air from inside the pipe 1 and discharging it into the pipe 1. Inlet port 3b and discharge port 3a of booster pump 3
By installing a valve 4 that opens and closes the pipe line 1 section located between Discharge port 3
On the a side, the pressure can be used to fully utilize the total pressure to efficiently increase the thrust, and when the bogie passes, the valve 4
When the booster pump 3 is in the position of opening the pipe line 1, the booster pump 3 acts as a jet pump, and thereby the long-distance conveyance can be carried out efficiently as a whole. The above-mentioned inconvenience caused by using the booster pump 3 with such a valve 4f=j, that is, the unexpected contact between the trolley 2 and the valve 4 due to the defective opening/closing operation of the valve 4, can be avoided. In view of the damage caused to the truck 2 or the valve 4 itself, the intake port 3b of the booth coupon pump 3
The trolley 2 is placed in a pipe line portion near and upstream thereof and a pipe line portion near and downstream of the discharge port 33, respectively.
A mechanism 5A (10a) that automatically opens and closes the valve 4 according to the differential pressure when the differential pressure across the
, 10b, 11) and 5B (10c.10d, 11)
With this, the trolley 2 is located so close to the pump station that the valve 4 must be opened, and the trolley 2 is located far enough from the bomb station that there is no problem in closing the valve 4. The company has succeeded in virtually integrating the position detector that detects this and the device that opens and closes the valve in response to the position sensor, and as a result, there is no possibility of failure like in the conventional valve opening/closing device mentioned above. The accidental collision between the truck 2 and the valve 4 due to this can be reliably prevented, and the desired boosting function of the in-line booster can be achieved safely and reliably.

[Brief explanation of the drawing]

The drawings show an embodiment of the forced air flow in-pipe transport device according to the present invention, in which FIG. 1 is a cutaway side view of the main part, FIG. 2 is an enlarged sectional view of the main part, and FIGS. 3 and 4 are cross-sectional views of the main part. It is a cutaway side view of the main part of the conventional structure. 1... Conduit, 2... Luggage transport trolley, 3...
... Booster pump, 3a ... Discharge port, 3b ... Suction port, 4 ... Valve, 5A.
5B...Valve opening/closing mechanism.

Claims (1)

[Claims] 1. In an intra-pipe transportation device configured to forcibly move a cargo carrier 2 along the pipe 1 using forced airflow generated in the pipe 1 as a thrust source, A booster pump 3 is installed to suck air from inside the pipe line 1 and discharge it into the pipe line 1, and a portion of the pipe line 1 located between the suction port 3b and the discharge port 3a of the booster pump 3 is installed. A valve 4 for opening and closing this pipe line 1 section is installed, and a pipe line part near and upstream of the inlet port 3b of the booth coupon pump 3 and a pipe line near the discharge port 3a and downstream of it are installed. Mechanisms 5A (10a, 10b, 11) and 5B (10c, 10d, 11) that automatically open and close the valve 4 according to the differential pressure between the front and rear of the truck 2 when it exceeds a certain value, respectively. An intra-pipe transport device using forced airflow, characterized in that it is provided with: