JPH02190535A - Trencher for laying pipe - Google Patents

Abstract

PURPOSE:To raise the efficiency of operation by a method in which a soil- discharge screw with an elastic blade is attached to the inside of the support frame of a device with nozzle, and a soil-discharge chute is provided to the upside of the frame. CONSTITUTION:A nozzle-fitted device 13 provided along the frame 12 is set to face the soil wall. While turning each nozzle 14, water jet is jetted and the device 13 is vertically moved by a cylinder 18 to excavate a trench in the ground. The excavated soil is discharged to outside by a soil-discharge chute through a soil-discharge screw 15 with elastic blades.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a trench excavation device for management facilities for excavating trenches in which gas pipes and water pipes are buried.

[Conventional technology]

Conventionally, the above-mentioned trenches were excavated using a power shovel or a trencher.

[Problem to be solved by the invention]

If a trench is being excavated with a power shovel or trencher and there is already buried pipe, if the trench is deep, the inside of the trench cannot be seen from the operator's seat of the power shovel or other excavator, so the operator should excavate very carefully following the signals from the assistant. If the existing buried pipe is a weak pipe such as a PVC pipe,
There is a problem that even slight contact with the packet or digging blade can cause damage or destruction.

The present invention has been developed with the above in mind, so that even if there is a pipe that is already buried underground, and even if the pipe is made of a material with low strength such as PVC, it will not damage the pipe. Therefore, it is possible to excavate a trench around this pipe without having to dig a trench around the pipe.
This can be done without slowing down the speed, improving trench excavation efficiency, and eliminating the need for assistants when excavating trenches near existing buried pipes, resulting in labor savings.
Furthermore, it is an object of the present invention to provide a method for excavating a management facility trench and an apparatus therefor, which enable efficient discharge of excavated earth and sand.

[Means to solve the problem]

In order to achieve the above object, a trench excavation device for management facilities according to the present invention includes a nozzle mounting device in which a large number of nozzles are arranged over a predetermined length, and a frame that supports this nozzle mounting device. One longitudinal end of
A management installation groove is connected to the end of an arm provided on the trolley so that it can be raised and lowered, and the nozzle mounting device is connected to a hydraulic device, and the nozzle mounting device can be reciprocated in the length direction of the frame. In the excavation equipment, the frame is formed into a U-shaped cross section with an opening in the direction in which the nozzle faces, and inside the frame is an earth removal screw whose blades are made of an elastic material, and a part of its outer periphery is connected to the nozzle. Install it internally so that it is approximately in the same position as the device, and attach it to the top of the frame.
The structure includes an earth discharge chute for discharging the earth and sand discharged by this discharge screw.

In addition, instead of the soil removal screw of the above configuration, a soil removal duct is provided along the nozzle mounting device, the lower end of this soil removal duct is opened at the lower end of the nozzle mounting device, and the upper end is opened by a vacuum It may also be configured to be connected to a device.

Further, the nozzle mounting described above allows the device to be reciprocated in the length direction of the frame, and also allows the nozzle to swing in the width direction of the frame or rotate in a circle relative to the excavated surface of the trench.

[For production]

When installing a nozzle on an earthen wall, the device is placed facing the wall and a water jet is ejected from the nozzle, causing the wall to collapse.
It is peeled off and a trench is dug into the soil. The excavated earth and sand at this time is discharged by an earth discharge screw or by a vacuum device via a discharge duct. The excavated surface of the groove is also cut by the ejection screw. Furthermore, by rotating the nozzle in the vertical direction, in the width direction of the frame, and in a circular manner with respect to the excavation surface, the soil can be effectively collapsed and peeled off by the nozzle.

〔Example〕

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

In the figure, reference numeral 1 denotes a truck, and this truck 1 has a swivel base 3 rotatably mounted on a crawler-type traveling device 2.
A driver's seat 4, a water tank 5, a water pump 6, and a travel drive device (engine, etc.) 7 are provided on the top. Further, an arm 8 is provided at the front part of the swivel table 3 so as to be able to rise and fall. 9 is a cylinder for raising and lowering the arm. The traveling device 2 has a low speed, e.g.
It is possible to travel at a speed of about 0 am/a+In.

10 is a trench excavation device attached to the tip of the arm 8;
This trench excavating device 10 is suspended and supported from the tip of an arm 8 so as to be able to rise and fall in the front and rear directions, and is driven to rise and fall by a cylinder 11. And this trench excavation device 10
The frame 12 is connected and supported by the arm 8, and the nozzle mounting device 13 is provided along the frame 12.
, a plurality of nozzles 14 provided rearward in the longitudinal direction of the nozzle mounting device 13 , and an earth removal screw 15 provided along the frame 12 .

The nozzle 14 is connected to the water pump 6 via a pipe 16 running along the arm 8 and the rotating table 3.

FIG. 2 to FIG. 4 schematically show the structure of the nozzle 14 in the trench excavating device 10.

In the case shown in FIGS. 2(A) and 2(B), nozzles 14 are arranged on both sides of the groove to be molded in the width direction and in the depth direction of the groove, and one to three water pipes are inserted from the tip of each nozzle 14. Each jet can be ejected at an angle,
The nozzle mounting device 13 provided with each nozzle 14 is capable of reciprocating vertically with respect to the frame 12 by means of a cylinder 18. Therefore, the wall surface of the groove is shown in Figure 2 (
As shown in C), a large number of rows of cutting grooves 17b are cut in the vertical direction, and the wall surface collapses into a clod of earth 19, forming a groove.

What is shown in Fig. 3 (A) and (B) is shown in Fig. 2 (A) and (
The nozzle 14 shown in B) is further added with a mechanism that swings (or reciprocates) in the width direction of the frame 12, so that the wall surface of the groove is free of soil as shown in FIG. 3(C). A groove is formed by actively cutting and collapsing the soil mass 20 like a base grain.

What is shown in FIGS. 4(A) and 4(B) is shown in frame 12.
A rotating nozzle plate 21 having a plurality of nozzles 14 is provided so as to be movable up and down, this rotating nozzle plate 21 is rotated by a rotating motor 22, and this rotating nozzle = bullet 21 is further moved by a vertically moving motor 23 and a ball screw 24. Water jet is ejected from the nozzle 14 while moving up and down. As a result, the soil on the wall of the groove is separated and collapsed to form the groove, as shown in FIG. 4(C).

An example of a specific configuration of the trench excavating device 10 including an earth removal device provided along the frame 12 is shown in FIG. 5 and below.

The frame 12 connected to the arm 8 on the truck 1 side at the fifth teeth (A) and (B) is formed into a U-shape in cross section as shown in FIG. A nozzle mounting device 13 having a large number of nozzles 14 in the vertical direction is used for mounting. An earth removal device 15 is provided in the vertical direction inside the frame 12 having a U-shaped cross section.

This earth unloading device 15 has an earth unloading screw 15 whose blade portion is made of an elastic material such as rubber installed inside the frame 12 along the longitudinal direction of the frame 12. The soil discharging screw 15 is arranged so that its diametrical side portion substantially coincides with the end surface of the nozzle mounting device 13. Both ends of the earth removal screw 15 are supported by the frame 12, and a motor 16 is connected to the upper end thereof. Further, the upper part of the earth removal screw 15 is connected to the earth removal chute 17.

Figures 7(A) and CB) show the other side of the soil removal device, in which a suction port 31 that opens toward the excavation part is provided at the lower end behind the nozzle attachment device 13. Duct 32
The upper end of this soil removal duct 32 is connected to a vacuum device 33. By driving the vacuum device 33, the soil excavated by the water jet and turned into slurry is discharged. It is designed to be discharged through a soil duct 32.

Although not particularly shown in the embodiments shown in FIGS. 5 and 7, each nozzle mounting device 13 is attached to the frame 12.
It may also be made to reciprocate in the vertical direction along.

〔Effect of the invention〕

According to the present invention, when there is an existing underground pipe underground, by excavating a management installation trench with the water jet and the earth removal screw 15 made of rubber material, Even if the pipe is made of a material with low strength such as PVC, it is possible to excavate a trench around the pipe without damaging the pipe. , without slowing down (this can be done efficiently).

Furthermore, by discharging the earth and sand using the vacuum device 33 through the earth removal duct 32 instead of the earth removal screw 15, it is possible to carry out efficient and continuous earth removal operation without requiring a mechanical drive unit. .

Further, the nozzle mounting device 13 reciprocates in the length direction of the frame and swings in the width direction of the frame, or rotates the nozzle in a circular manner with respect to the excavated surface of the trench, so that the soil is collapsed by the nozzle 14. , peeling can be performed well.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is an explanatory diagram of the overall configuration, and FIGS. 2(A), (B), and (C) to 4(A)
), (B), and (C) schematically show each embodiment of the device of the present invention, in which (A) is a side view, (B) is a plan view, and (C) is a trench excavation surface. FIG. (A) and (B) of FIG. 5 and FIG. 7 show different embodiments of the trench excavation device, respectively. (A) of each figure is a front view, (B) is a cutaway side view; FIG. 6 is a cross-sectional view taken along the line VT-VI in FIG. 5(A). 1 is a trolley, 6 is a water pump, 8 is an arm, 10 is a trench digging device, 12 is a frame, 13 is a nozzle mounting device, 14 is a nozzle, 15 is an earth removal screw, 32 is an earth removal duct, 33
is a vacuum device. Applicant Komatsu Ltd. Representative Patent Attorney Masaaki Yonehara

Claims (4)

[Claims] (1) It consists of a nozzle mounting device in which a large number of nozzles are arranged over a predetermined length, and a frame that supports this nozzle mounting device. In a trench excavating device for management construction, the nozzle is connected to the tip so that it can rise and fall, and the nozzle attachment device is connected to a hydraulic device, and the nozzle attachment device is movable back and forth in the length direction of the frame, with the nozzle facing the frame. The frame is formed into a U-shaped cross section with an open side, and inside this frame is an earth removal screw whose blades are made of an elastic material, with a part of its outer periphery located at approximately the same position as the nozzle mounting device. A trench excavation device for management facilities, characterized by having an earth removal chute installed inside the frame and discharging earth and sand removed by the earth removal screw at the upper part of the frame. (2) It consists of a nozzle mounting device in which a large number of nozzles are arranged over a predetermined length, and a frame that supports this nozzle mounting device, and one longitudinal end of this frame is attached to an arm that is movable on a cart. Connected to the tip so that it can be raised and lowered,
In addition, in a trench excavation device for management facilities in which a nozzle mounting device is connected to a water pressure device and the nozzle mounting device is capable of reciprocating in the length direction of the frame, a soil removal duct is installed along the nozzle mounting device. A trench excavation device for management facilities, characterized in that the lower end of the soil removal duct is opened at the lower end of the nozzle attachment device, and the upper end is connected to a vacuum device. (3) The management system according to claims 1 and 2, wherein the nozzle mounting device to which the nozzle is attached is capable of reciprocating in the length direction of the frame, and the nozzle is swingable in the width direction of the frame. trench excavation equipment. (4) The nozzle mounting device to which the nozzle is attached is capable of reciprocating in the length direction of the frame, and the nozzle is rotatable in a circle relative to the excavated surface of the groove. The trench excavation device for management facilities according to 2.