JPS59122638A - Plow type laying machine with high-pressure water being applied - Google Patents

Abstract

PURPOSE:To avoid the incongruity of the excavating speed and the towing speed by a method in which a trench is excavated by a plow while jetting water jet stream from an excavating nozzle provided in the bottom of the upper stage plow toward the front of the lower plow. CONSTITUTION:A plow 8 attached to the center of sleighs 7a and 7b is shaped into a box form, the tip of a plow 9 consisting of plural steps 9a, 9b, and 9c, set in the plow 8, is shaped into an acute angle form, and the bottom of the plow 9 is shaped into a horizontal form. The length of the plow 9 is set up such that water jet streams 12a and 12b from jet nozzles 11a and 11b provided inside are jetted to the right front of the plow blades 9a and 9c below one step, and the bottoms 10a and 10b of the upper stage plow blade are formed to be leveled with the upsides 13a and 13c of the basal base of the plow 9 below one step. A cable 4 sent out of a laying ship is buried in a trench 16 excavated in the seabed 18 through the rear of the plow 9 from an inlet 15.

Description

Detailed Description of the Invention (Industrial Field of Application) The present invention provides a dynamic burying machine that uses high-pressure water to bury wire bodies such as power cables and water pipes in trenches while excavating trenches on the seabed. This is related to the improvement of.

(Background of the Invention) Burying machines that use both a plow and a water jet are already known, as shown in FIGS. 1 and 2.

In this burial machine, a plurality of flat plow blades 2 are installed above and below at a constant interval d in the space between a pair of left and right side plates 1a and 1b, and a high-pressure jet water jet is placed in the center of this constant interval d. A nozzle 3 is provided in an exposed manner. and striatum 4
・When burying, the burying machine 5 is moved by a towboat (not shown)
It is towed in the direction of the arrow, a jet stream and a plowshare are used to dig a trench on the seabed, and the filament 4 is buried in the trench.

Note that 6 is the introduction part of the striatum 4.

By the way, a mobile burial machine is generally towed at a higher speed than a jet burial machine, so if it is an ijq construction where the nozzle is exposed at the front and directly contacts the excavated object as mentioned above, the excavation speed with the jet water stream will be lower. It is not possible to adjust the towing speed according to the
Quite often, the burial machine itself advances before the water jet can excavate. As a result, the jet nozzle 3 may not be able to perform its original function, and the jet nozzle 3 may be clogged with dirt or damaged, and the original purpose may not be achieved.

In addition, there is a gap d between the plow blades of the lower and lower stages, and the structure is such that the jet water flow from the nozzle 3 excavates between these parts.
It is necessary to completely excavate with a jet water stream, and if the forward speed of the burial machine is faster than the excavation speed of the jet, there is a risk that the jet nozzle will be damaged and the original excavation resistance will not be reduced as the excavation will be incomplete. .

Further, since the excavating nozzles 3 are arranged in a row below the groove 1 in the center between the side plates 1a and 113, there are various problems in that the groove width may be narrowed.

The present invention has been made to improve the above-mentioned problems.

(Structure of the Invention) The present invention will be described with reference to the embodiments shown in FIGS. 3 to 5. Figure 3 is a side view, Figure 4 is a sectional view aa' of Figure 3,
FIG. 5 shows a bottom view of the plowshare.

1a and 7b are sled parts, and a plow 8 is attached to the center thereof. The plow 8 has a box-shaped structure made of, for example, welded steel plates, and the plow blades 9 are installed in multiple stages 9a, 9b, and 9c. In the illustrated embodiment, there are three stages, but depending on the excavation depth, the number can be two or four stages. The tip of the plow blade 9 is formed into an acute angle, and the bottom portion 10 is horizontal, and a plurality of jet nozzles 11a, 11b are provided inside the bottom portion 10. fJ8.1
The length of the plow blade 9 is determined so that the plow blades 2a, 121) are injected directly in front of the plow blades 9b, 9c one level below. In addition, the distance between the upper and lower plow blades, D2 is the bottom 10a of the upper plow blade.
', 10b is one step below the base upper side 13b, 13 of the plowshare.
It is mounted on the same horizontal plane as c or at a position below it. Further, the width -el of the plow blade 9 is determined depending on the size of the filament to be buried. 14 is a high-pressure water pipe, one end of which is connected to each Geno 1 nozzle 11a.

11 L+, and the other end is connected to a water pressure pump on board. Reference numeral 15 denotes an introduction section for a filamentous body such as a cable or water pipe, and the filamentous body 4 unwound from the laying ship is buried in the groove 16 from this introduction section 15 through the rear part of the plow blade. 1
8 is the ocean floor.

Striatum 4. The method of laying the buried trench 17 is to tow the buried trench 17 in the direction of the arrow with a tugboat while spraying a jet of water with a water pressure (10 to 200 TD/a2) that is appropriate for the quality of the seabed.
A trench is excavated using a water jet and a plowshare.

In this swamp, we will bury the striatum that has drifted out from the I'Ii construction ship. As described above, the mobile burying machine using high-pressure water according to the present invention has the following abrasion effects.

■The jet nozzle is installed inside the bottom of the plow blade and is not exposed to the outside, so when the burying machine is towed, the nozzle does not come into direct contact with the earth and sand to be excavated. Therefore, the nozzle will not be clogged with dirt or damaged.

■The jet water stream excavates in front of the plow blades of 2 or less stages, and assists the excavation of the plow blades of 2 stages or less, so there is less digging resistance than a burial machine with only plow blades, so it can be towed at high speed to dig trenches. I can do it.

■Depending on the width of the plow blade, install 2 to 3 jet nozzles vertically and horizontally.
When arranged in rows, the water jet can excavate almost the entire width of the plow blade even in cohesive soil.

[Brief explanation of the drawing]

1 and 2 show a conventional example, with FIG. 1 being a side view and FIG. 2 being a front view. 3 to 5 show an embodiment of the present invention, FIG. 3 is a side view, and FIG. 4 is a-a of FIG. 3.
'Cross-sectional view, Figure 5 is a bottom view of the plowshare. 4. Striatum, 8. Plowshares, 9. Plowshares, 10.
Plow blade bottom, ll...Jet nozzle, 12...Jet water stream, 14...High pressure water piping, 15...Striatal body introduction part, 16...Groove, 17...Burying machine, 18... Undersea. Author 4 Figure 5 Figure 11 No. I-H Procedural amendment August 26, 1980 Commissioner of the Japan Patent Office Kazuo Wakasugi 1. Indication of the case 1988 Patent Application No. 234.74.1 No. 3. Make amendments. Relationship with the case Patent applicant address 5-15 Kitahama, Higashi-ku, Osaka Name (21
3) Sumitomo Electric Industries Co., Ltd. President Tetsube Yojo 4/9 Agent address 1-chome Shimaya, Konohana-ku, Osaka City [1] No. 3 Sumitomo Electric Industries Co., Ltd. 6, application subject to amendment and drawings 7, amendment Contents (1. First, submit an application with the name of the invention accurately written in attached sheet 5. (2) Amend box 3 in the drawing as shown in the attached sheet.

Claims (3)

[Claims] (1) In a movable burial machine having multiple stages of upper and lower plow blades, an excavation nozzle is provided in the bottom of the upper plow blade, and a jet water stream is injected from the nozzle in front of the lower plow blade. A dynamic burying machine that uses high-pressure water to excavate a trench and bury the filament in the trench. (2) The movable burial machine according to claim 1, wherein a plurality of excavation nozzles are provided in the bottom of the plow blade. (3) The movable burial machine according to claim 1, wherein the plurality of stages of plow blades are arranged such that the bottom of the upper stage and the upper side of the base of the lower stage are arranged on substantially the same horizontal plane.