JPS5849452B2 - Intraduct transportation equipment - Google Patents

Description

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

As a means for propelling the cargo carrier in this type of intra-pipe transportation device, there is a pressure-feeding type or a suction-type method in which a pump is installed at the conveying end of the pipe to utilize the total pressure.

However, when the pipeline becomes long, the thrust of the pump installed at the end of the pipeline is insufficient, so it is necessary to increase the thrust of the forced air flow in the middle of the pipeline. A jet pressure boosting pump is installed in the middle of the line to suck in from inside the line and discharge it into the line, or
It has been proposed to provide a boosting pump similar to the one described above, and to equip the discharge side of the boosting pump with a valve that can be opened and closed with respect to the pipe line.

A comparison of the two shows that when the valve is in the position of blocking the pipeline, suction can be fully utilized on the suction port side and pressure feeding can be fully utilized on the discharge port side, and the valve can also open the pipeline. If you are in a position to do so, the latter pump is more efficient and has the same function as the former pump.

However, with this type, when the valve is opened as the truck approaches, the valve is subjected to a considerable amount of pressure in the valve closing direction due to the airflow pressure discharged from the discharge port of the pressure boosting pump. Because of the moment acting on the valve, a large force is required to open the valve, and the opening/closing device that controls the opening of the valve must be enlarged. When the gas is transferred to the conduit section between the mouth and the discharge port, there is an inconvenience that a reverse airflow generated due to the airflow discharged from the discharge port acts on the vehicle, applying a braking force to the vehicle.

The present invention has been developed in view of the above points, and includes an intra-pipe transportation device configured to move a cart along the pipe using forced airflow as a propulsive force. A booster pump is provided in a bypass manner along the way, and the pump is located close to the suction and discharge ports in the pipe section between the suction and discharge ports of the booster pump, and is located at a distance larger than the longitudinal length of the truck. Valves are provided at separate positions that alternately open and move as the cart approaches a certain level, and when the upstream valve is in the open position, the pump also draws air from within the pipe line. , the discharge port discharges air into the pipe line downstream of the downstream valve, and when the downstream valve is in the open position, air is taken in from the suction port and flows into the pipe line section upstream of the valve. This system is characterized by being equipped with a switching valve mechanism that discharges from the inside of the pipe, so when the upstream valve is switched to the open position as the truck approaches, the suction caused by the pump sucking from inside the pipe section is removed. The cart can be carried smoothly into the pipe section by force, and when opening the valve on the downstream side, air is taken in from the suction port 3a and discharged into the pipe section upstream of the downstream valve. This allows the valve to be opened reliably and smoothly with an extremely small operating force, unlike the conventional structure where a moment acts on the valve in the direction of valve closing. Since the reverse airflow generated during the process does not act on the trolley, unexpected braking force is not applied to the trolley, and it can be smoothly transported to the designated location.Therefore, there are no problems such as clogging throughout the line, and efficiency is improved. We were able to perform a good transport work.

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

FIG. 1 is a side view of the main part and an explanatory diagram of the operation at that point, in which 1 is a pipe installed using the space under an elevated structure, and 2 is a pipe The truck has a pressure receiving plate 2a having an area smaller than the cross-sectional area of the pipe 1, running wheels 2b that roll in sliding contact with the inner wall of the pipe 1, and a collision mitigation device 2c for a truck protruding in the front and rear direction. The system uses the forced airflow generated in the pipe 1 as a thrust source to move along the axial direction of the pipe 1, and draws air from inside the pipe 1 midway through the pipe 1, and Conduit 1
A bypass-type boosting pump 3 is provided, and a pipe section between the suction port 3a and the discharge port 3b of the pressure-boosting pump 3 is provided at a position close to the suction port 3a and the discharge port 3b within one person. , and valves 4a and 4b which can be selectively switched between opening and closing one conduit section are provided at positions spaced apart from each other by a distance longer than the longitudinal length of the trolley 2, and Branch pipes 5a, 5b connected in communication across the bypass paths 3A, 3B of the pressure boosting pump 3 and a location close to the valves 4a, 4b in the pipe section for one person, and both the bypass paths 3A, 3B. The switching valve mechanism A is controlled by the valves B1, B2, B3, and B4 installed in the branch pipes 5a and sb, respectively, so that the valve 4a on the upstream side is opened as the truck 2 approaches. When switched to the posture, the pump 3 takes in air from the pipe section 1A through the branch pipe 5a and discharges it from the discharge port 3b into the pipe 1 downstream of the valve 4b, and , when the valve 4b on the downstream side is switched to the open position as the trolley 2 approaches, air is taken in from the suction port 3a and flows into the pipe section 1A upstream of the valve 4b via another branch pipe 5b. It is designed to discharge to.

In the figure, reference numeral 9 indicates a stopper that limits the operating range of both the valves 4a and 4b.

Figure 2A shows another embodiment in which both the branch pipes 5a and sb of the previous embodiment are connected to one pipe section in a cross state.

FIG. 3A shows another embodiment, in which the pressure pump 3
A branch pipe line 6 is interposed between the discharge bypass line 3B and the pipe section 1A, and the branch line 6 and the discharge bypass line 3B
A flow path switching valve B is provided at the connection point with the flow path switching valve B, thereby configuring the switching valve mechanism A.
a is switched to the open position, the pump 3 takes in air from the suction port 3a and the inside of the pipe section 1A, and discharges it from the discharge port 3b into the pipe line 1 downstream of the valve 4b on the downstream side, Further, when the valve 4b on the downstream side is switched to the open position, air is taken in from the intake port 3a and discharged through the branch pipe 6 into a pipe section upstream of the valve 4b. There is.

Further, a pressure difference eliminating valve 7 is provided above the upstream valve 4a to communicate the front and rear pipe sections of the valve 4a to eliminate the pressure difference, and a pipe line section upstream of the downstream valve 4b is provided. 1A and the opening 6a of the branch pipe 6, there is a second bypass path that releases the pressure to the opening 6a when the pressure between the valve 4b on the downstream side and the truck 2 exceeds a certain level. 8 is a formal precept.

[Brief explanation of drawings]

The drawings illustrate embodiments of the intra-pipe transport device according to the present invention, and FIG. 2A and 2B are a schematic side view and an operational diagram of main parts of another embodiment, respectively. 1...Pipeline, 1A...Pipeline part, 2.
・・・・・・Dolly, 3・・・Boost pump, 3a・
...Suction port, 3b...Discharge port, 4a,
4b...Valve.

Claims (1)

[Claims] 1. In an intra-pipe transportation device configured to move a cart 2 along the pipe 1 using forced airflow as a propulsion force, a boost pump 3 is provided in a bypass manner in the middle of the pipe 1, and The pipe line between the suction port 3a and the discharge port 3b of the boost pump 3 is placed near the suction port 3a and the discharge port 3b within one person, and at a distance greater than the longitudinal length of the truck 2, respectively. , valves 4a and 4b are provided which alternately open and move as the truck 2 approaches a certain level, and when the upstream valve 4a is in the open position, the pump 3 also draws air from within the pipe section 1A. Then, it is discharged from the discharge port 3b into the pipe line 1 downstream of the downstream valve 4b, and the downstream valve 4
An intra-pipe transportation device characterized by being provided with a switching valve mechanism that takes in air from the suction port 3a and discharges it into a pipe section upstream of the valve 4b when the valve 4b is in the open position.