JPH018596Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to an improvement of an underwater cable burying machine used for burying cables at the bottom of oceans, rivers, etc.

Problems to be solved by conventional technology and ideas Conventional submarine excavators include plow-shaped ones and box-shaped ones that use a water jet in combination. The former plow type requires a large amount of tension when digging, while the latter water jet type has the disadvantage that the jet stream does not pass through easily, making it difficult to excavate.

Although a combination of a plow and a water jet has been considered, many of them still suffer from one of the above-mentioned drawbacks, and improvements have been desired.

Means for solving the problem This invention was made in view of the above circumstances.
Its outline consists of a main body frame, a pair of sleds attached to both ends of the frame, and an excavation body attached between the pair of sleds.The excavation body moves from the upper front position to the lower rear position. Serrated teeth are provided that slope backward at an angle of 90° or more to the horizontal direction, and a nozzle that sprays water downward is provided between each tooth, and each tooth has a horizontal cross section. It is formed into a plow-shaped shape with a tapered wedge shape, and the front edge of each tooth is horizontally tapered from the top to the bottom.
This is a burial machine with a structure that tilts forward at an angle of less than 90 degrees.

Example Embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a schematic front view of the burying machine of the present invention, and a pair of sleds 10, 1 are provided at both left and right ends of the main body frame 12.
0 is attached, and an excavation body 2 is installed between the two.
0 is installed. The sleds 10, 10 are towed to the surface of the seabed, and the seabed is excavated by the action of the excavator 20.

Figure 2 is an enlarged side view of the burying machine of the present invention.
The same parts as in the figure are given the same reference numerals. The excavating body 20 is provided with serrated teeth 26, 26, which will be described below, diagonally rearward from the central lower surface of the main body frame, and is supported by a stay 14 connected to the main body frame at the rear in the figure. has been done.

In other words, the excavation body moves from the upper front position to the lower rear position at an angle of α in the horizontal direction (the direction of movement of the burying machine) 22.
The nozzle 32 is provided at an angle of >90°, and between each tooth is a nozzle 32 that sprays water downward at the tip of the tooth. 34
indicates water jet. Note that the cable 40 is made into a cable to be buried and is successively sent to the deepest part of the excavation, laid, and buried by covering with earth and sand.

Figures 3, 4, and 5 show the structure of each tooth, and are a perspective view, a side view, and a side view, respectively.
A directional view is shown.

As shown in FIG. 3, the tooth 26 has a horizontal cross section 28 in the shape of a tapered wedge, and its front edge 30 is sloped from the top to the bottom. 4 and 5 show a continuous state of two teeth 261 (lower) and 262 (upper), and the inclination angle β of the leading edge 30 of the tooth with respect to the horizontal direction (direction of movement of the embedding machine) 22 is < It is configured at 90°.

A nozzle 32 that sprays water jet 34 is provided on the lower surface of the base of each tooth, and when the embedding machine advances, the nozzle 32 sprays a water jet 34.
When the excavator 62 excavates the earth and sand and plows up the earth and sand A, the earth and sand with a thickness of B immediately below is excavated by the lower teeth 261 while being blown away by the water jet. The same applies below.

Effects of the invention According to the invention, the excavation body is provided between a pair of sleds, so stability is good, and the excavation body is composed of serrated teeth and extends 90 degrees horizontally from top to bottom. Because it is tilted backwards at an angle of more than ゜,
Digging is carried out sequentially from the upper teeth to the lower teeth, so unlike digging deeply at once, there is no need to overdo it, and water is sprayed downwards between each tooth to remove dirt and sand. The structure of each tooth is tapered wedge-shaped in horizontal cross section, and the leading edge of each tooth is shaped in the horizontal direction from the top to the bottom.
Since it is tilted forward at an angle smaller than 90 degrees, it has various functions such as being able to easily dig into the earth and sand with a small tension, making it possible to work and excavate layers such as clay with a small tension, and to excavate long objects such as cables. Can be easily buried.

[Brief explanation of the drawing]

The figures relate to an embodiment of the present invention; Fig. 1 is a front view;
2 is an enlarged side view, FIG. 3 is a perspective view of some of the teeth 26, FIG. 4 is a side view, and FIG. 5 is a view taken in the direction of the - arrow in FIG. 4. 10... Sled, 12... Body frame, 14...
...stay, 20...excavation body, 22...direction of travel,
26, 261, 262...teeth, 28...horizontal section, 30...front edge, 32...nozzle, 34...water jet.

Claims (1)

[Scope of utility model registration request] Consists of a main body frame, a pair of sleds attached to the left and right ends of the frame, and an excavation body attached between the pair of sleds. Serrated teeth are provided that slope backward at an angle of , and the front edge of each tooth is inclined forward at an angle of less than 90° with respect to the horizontal direction from the top to the bottom.