JPS6156732B2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a seabed surface hardness measuring device.

Conventionally, this is a hardness measuring device mounted on a surveying machine that is towed by a tugboat on the sea surface and glides over the seabed. There is a known device that measures the hardness of the seabed surface by dropping a penetrating rod and measuring the amount of fall of the penetrating rod.In this known device, a large and heavy jet pump is installed to form a water jet. using the device,
For this reason, the entire device became large-scale and the work was difficult.

The present invention has been made in order to eliminate the above-mentioned drawbacks of the conventional art, and for this reason, the present invention is a hardness measuring device mounted on a surveying machine that is towed by a tugboat and slides on the seabed surface. a jet penetration device body configured to eject a water jet toward the hole and drop the penetration rod into the drilled hole;
The jet penetrating device body includes a guide for vertically moving the main body, an elevating mechanism for the main body, and a detection device for detecting the amount of penetration of the penetrating rod into the seabed soil, and the jet penetrating device main body has a water jet ejection hole at the tip. The penetrating rod, a hydraulic cylinder integrally formed with the penetrating rod and sucking seawater and extruding it from the spout hole, and a hydraulic cylinder attached to the hydraulic cylinder to operate a piston rod of the hydraulic cylinder. It is characterized by

Preferred embodiments of the present invention will be described below with reference to the accompanying drawings.

The figure is a schematic explanatory diagram of an embodiment of a device according to the present invention, and the device of this embodiment is generally attached to a guide rail fixed to a sled-shaped surveying device 2 that slides on a seabed surface 1 while being towed by a tugboat (not shown). 3, a jet penetrating device main body 5 whose movement is guided up and down by rollers 4 running on the guide rail 3, and a chain 6 and a shaft fixing pulley 7 on the jet penetrating device main body 5.
A hydraulic cylinder 9 for lifting and lowering the jet penetration device main body 5 is connected to the shaft-moving pulley 8, and a penetration detection device 10 is connected to the rotating shaft of the shaft-fixing pulley 7.

The jet penetration device main body 5 includes a hollow penetration rod 12 having a water jet jet nozzle 11 at its tip.
, a hydraulic cylinder 13 formed integrally with the penetrating rod 12 and communicating with the hollow part of the penetrating rod, and a hydraulic cylinder 13 provided on the hydraulic cylinder 13 and connected to the hollow part of the penetrating rod 12 .
and a small hydraulic cylinder 16 having a common piston rod 15 for actuating the pistons 14 of the two. Pressure oil is supplied to the hydraulic cylinder 16 to the rod end and the head end via a hydraulic power source and a switching valve (not shown) on the surveying machine 2. Hydraulic cylinder 13
The piston 14 and the jet nozzle 11 are provided with check valves 18 and 19 as shown in the figure.

The hydraulic cylinder 9 has a cylinder portion fixed to the surveying machine 2, and the movable pulley 8 is pivotally supported at the tip of the piston rod 20. The jet penetrating device 5 is connected to the hydraulic cylinder 9 by supplying pressure oil to the head end from the hydraulic source (not shown). By pulling up the entire device 5 and releasing pressure oil from the end of the head, the entire device 5 is allowed to fall due to its own weight.

The penetration detection device 10 is designed to electrically detect the amount of penetration of the penetration rod 12 into the seabed 1 by electrically detecting the rotation angle of the 7 shafts of the pulley.

Next, the operation of the above embodiment device will be described.
First, when the pressure oil is released from the head end of the lifting hydraulic cylinder 9, the piston rod 20 retreats and the jet penetrating device body 5 is moved so that the tip of the penetrating rod 12 is at the bottom of the seabed.
It will descend under its own weight until it is seated. At this time, the pointer of the detection device 10 is set to zero. Next, the piston of the hydraulic cylinder 16 of the jet penetration device main body 5 is pushed out, thereby pushing out the piston of the hydraulic cylinder 13, and the water filled in the cylinder 13 is jetted out from the nozzle 11 at the tip of the penetration rod 12 at a predetermined pressure. . When a water jet is ejected from a nozzle, earth and sand around the nozzle are removed and a hole is excavated. Therefore, the device main body 5 falls under its own weight as the hole is excavated, and the amount of fall of the penetrating rod that stops when all the water in the cylinder 13 is removed is detected by the detection device 10 as the amount of penetration.

To pull up the penetrating rod 12, the piston rod 20 of the hydraulic cylinder 9 is pushed out, and the entire device body 5 is pulled up via the chain 6. In addition, in order to fill the hydraulic cylinder 13 with water again, the piston 14 of the hydraulic cylinder 13 is also pulled up at the same time by retracting the piston of the hydraulic cylinder 16, so that the seawater flows into the opening 1 of the cylinder 13.
3a and the check valve 18 of the piston 14 into the cylinder. At this time, the check valve 19 prevents seawater from flowing in from the tip of the nozzle 11. The operation of each part of the apparatus described above as well as the hardness display can be performed on the towboat via a control cable (not shown).

As described above, according to the present invention, water jet at a predetermined pressure can be generated using a relatively small and lightweight hydraulic cylinder and a hydraulic cylinder without using a large and heavy jet pump. It can be made smaller and lighter, and workability can be greatly improved.

[Brief explanation of the drawing]

The figure is a schematic explanatory diagram showing one embodiment of the present invention. DESCRIPTION OF SYMBOLS 1... Seabed surface, 2... Investigation machine, 3... Guide rail, 5... Jet penetration device main body, 9... Hydraulic cylinder for lifting, 10... Penetration degree detection device, 11
... Nozzle, 12 ... Penetration rod, 13 ... Hydraulic cylinder, 16 ... Hydraulic cylinder.

Claims (1)

[Claims] 1 A hardness measuring device mounted on a surveying machine that is towed by a tugboat and glides on the seabed, and is configured to eject a water jet toward the seabed and drop a penetrating rod into an excavated hole. The jet penetrating device is equipped with a jet penetrating device main body, a guide for vertically moving the main body, a lifting mechanism for the main body, and a detection device for detecting the amount of penetration of the penetrating rod into seabed soil, and the jet penetrating device main body has a tip. a hydraulic cylinder integrally formed with the penetrating rod and sucking seawater and extruding it from the jetting hole; and a hydraulic cylinder attached to the hydraulic cylinder so as to operate a piston rod of the hydraulic cylinder. A seabed surface hardness measuring device consisting of a hydraulic cylinder.