JPS6115212B2 - - Google Patents

Description

[Detailed Description of the Invention] This invention is an excavation conveyor device, particularly used for discharging soil from underground storage tanks for oil, LNG, etc., or from excavation plates that gradually sink during underground excavations for general civil engineering works. The present invention relates to safety devices for conveyor equipment.

For example, underground storage tanks used for stockpiling oil, LNG, etc. are constructed by digging a excavation plate surrounded by a concrete ring that forms part of the tank's peripheral wall, which is previously formed above ground, and then transporting the ring underground. It is constructed based on a construction method in which annular objects are sequentially placed on top of the tank while it is lowered, but the offset is usually a group of conveyor belts connected to the ground in a spiral along the tank peripheral wall. It will be held in

However, there are various types of excavated soil damage, and when it comes to clay, silt, and other viscous materials,
As the soil clods grow larger, there is a problem in that a continuous conveyor belt causes problems at the joints, and as mentioned above, it is necessary to install a new conveyor belt every time a concrete ring is connected. I had to stop working.

The purpose of this invention is to provide a conveyor system in which a bucket elevator automatically descends as construction progresses on an excavation platform that gradually sinks, allowing continuous work to be continued without the need for pauses due to change of setup as in the past. The purpose is to provide safety equipment.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The configuration of the present invention will be described in detail below based on the drawings illustrating embodiments of the present invention.

Reference numeral 1 denotes a horizontally long gear frame supported at a constant height from the ground by struts 2, and two rails 3 are laid over substantially the entire area of the frame.

4 is a running trolley that runs on rails 3, with wheels 5
A pulley 7 fixed to a shaft that engages with a driving section 6 consisting of a pair of motors and a speed reducer on both sides is provided on a base plate supported by. A pair of wire winding drums 8 are fixed to one end of the frame 1, and are rotated by a roller chain 11 that engages with a chain wheel 10 directly connected to a geared motor 9, and are wound around the wire winding drums 8. One end of each wire rope 12 is fixed to the traveling carriage 4. That is, the traveling carriage 4 is always pulled to one side of the frame 1 by the wire rope 12. Reference numeral 13 denotes an endless body of a vertical conveyor, and a pulley 7 on the traveling carriage 4
A driven pulley 15a as shown in FIG.
15b, and the traveling trolley 4 is located on the right edge of the frame, with its hanging side slightly above the ground below the left end of the frame. The vertical conveyor 13 is, for example, a bucket conveyor or a special conveyor with corrugated edges.

The endless body 13 of the endless vertical conveyor rotates in a boot 16 provided at the hanging end. That is, this boot 16 has a U-shaped guide portion equipped with a pulley that winds and supports the hanging end of the endless body 13, and one side is provided with a hopper portion having an opening 17 protruding in an inclined manner as an input port. It is being The opening 17 is provided with a grizzly bar to remove large clods, and one side of the boot is fixed via a bracket 18 to the lowest concrete ring _a1 constituting the storage tank A. There is. Note 19a, 19
b is a platform that protrudes from the concrete ring as the excavator sinks.

Next, 21 is a belt conveyor provided below the running rail 3 on the frame 1 and extending over almost the entire area.
As shown in the figure, it is provided via a skirt (not shown) below the range in which the traveling truck travels, and transports the soil falling from the bucket 14 supported by the endless body 13 of the vertical conveyor. It is driven toward the earth and sand enclosure 22 provided below.
The earth and sand enclosure 22 may be designed to open below the end pulley 23 of the belt conveyor 21, provide a chute, and allow a dump truck to park below the chute.

Note that L indicates an excavation board, and normally on this excavation board, earth and sand are excavated with a shovel loader C, etc., and the boots 1 are
Sediment is being put into the input port 6.

When the carriage 4 is towed by the wire rope 12, an overload on the carriage 4 can be detected by providing a tension meter 24 on the wire rope 12.

When the tension meter 24 exceeds a set value, the geared motor 9 is rotated in response to a signal from the detection circuit 25 to run in a direction that loosens the traction of the traveling carriage 4, thereby preventing the rope from breaking due to overload.

Further, the pulley 7 around which the endless body 13 of the vertical conveyor is wound is also provided with an overload detection means, and the detection signal 25d can be used to operate the drive section 27 of the alarm device 26 to issue an alarm. At the same time, the endless body 13 itself is provided with a tension overload detection means 28, and is configured to stop the drive section 6 of the traveling carriage which is also linked to the alarm device 27.

The storage tank A shown in this embodiment is constructed by sequentially adding concrete annular objects a ₁ , a ₂ . . . each having a diameter of several tens of meters. Object a ₁ is at position C on the ground,
It is formed by sinking as the excavation plate L digs down, and by sequentially adding annular objects a ₂ and a ₃ on top of it, but it is not limited to the storage tank shown in this example, but can also be used for general civil engineering work. Although it can also be applied to a sliding conveyor for underground excavation, its operation will be described below. First, the traveling cart 4 is placed at an appropriate location on the frame 1 so that the boot 16 is located at a position corresponding to the excavation platform L. position. In this case, the traveling truck 4 is pulled by the wire rope 12 and wound around the wire winding drum, but as the excavation platform L descends underground, the traveling truck gradually separates from the wire winding drum 8. Moving.
The earth and sand conveyed by the bucket cart 14 supported by the endless body 13 of the vertical conveyor is lifted upward and moved horizontally via the driven pulley 15a. The earth and sand are completely discharged onto the belt conveyor 21, but if the vertical transport conveyor is overloaded at this time, its operation is stopped for safety reasons.

Since the present invention is as described above, firstly, as the vertical conveyor descends as the excavation platform sinks,
There is no need to construct a new belt conveyor as in the past, and there is no need for downtime for that purpose, and overload on the vertical conveyor and wire rope is detected, making it possible to safely transport excavated soil. Moreover, it has the effect of being reliably achieved.

Further, at the hanging end of the endless body of the vertical conveyor, a boot is provided, which is equipped with a pulley for winding and supporting the endless body of the vertical conveyor, and has an input port opening slanted on one side. The earth and sand excavated above and thrown into the boot from the input port can be reliably scooped up by a vertical conveyor that reverses and rises inside the boot, allowing efficient earth removal treatment.

[Brief explanation of the drawing]

The drawings illustrate one embodiment of the present invention, and FIG. 1 is a conceptual diagram showing the overall configuration, and FIGS. 2 and 3 are diagrams illustrating main parts of overload detection. DESCRIPTION OF SYMBOLS 1... Gear rally frame, 2... Support column, 3... Rail, 4... Traveling trolley, 5... Wheel, 6... Drive part, 13
...Endless body, 16...Boot, 24...Tension meter, 25...Detection signal, 26...Alarm device, 27...Drive unit.

Claims (1)

[Claims] 1. A long frame installed horizontally, a traveling trolley installed to be able to travel on this frame, and a vehicle wound around a pulley that is engaged with a drive unit provided on the traveling truck and extending downward from one end of the frame. An endless body of a vertical transport conveyor that hangs down, a wire rope that is wound around a wire winding device provided at the other end of the frame and pulls the traveling vehicle, and a wire rope provided below within the traveling range of the traveling vehicle on the frame. A belt conveyor for carrying out excavation, and a boot having a pulley for winding and supporting the hanging end of the endless body of the vertical conveyor and having an inlet opened in an inclined manner on one side, A conveyor device for excavation shearing, characterized in that it is provided with a detection circuit that drives a wire winding device in a direction to loosen the traction of a traveling cart when a tension meter provided on a wire rope exceeds a set value.