JPH0220305Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of an excavation device for a propulsion method in which a rotary cutter and a cutter drum are provided at the tip of a cylindrical body, and a screw conveyor for conveying the excavated soil in the cutter drum is provided in the cylindrical body. .

Conventionally, in the above-mentioned excavation equipment, the aperture ratio of the earth and sand intake port provided in the cutter was constant regardless of the properties of the earth and sand. If the amount becomes too large, the screw conveyor will be overloaded, leading to transportation troubles, and the earth and sand in front of the cutter will collapse due to the excessive inflow, making it difficult to advance the excavation equipment. In terms of quality, there was still room for improvement in terms of responsiveness to the properties of the soil, such as increased flow resistance due to the viscosity of the soil, making it difficult for the soil to flow in smoothly and greatly reducing excavation efficiency.

The purpose of the present invention is to make a simple improvement to the cutter so that it can appropriately deal with differences in the properties of earth and sand, so that good and efficient propulsion excavation can be performed at all times.

The characteristic configuration of the present invention is that, in the excavation equipment for the above-mentioned propulsion method, a face plate forming an earth and sand intake port into the cutter drum is connected to the cutter and the cutter drum via fixing devices provided inside and outside in the radial direction. It is removably attached, and its functions and effects are as follows.

In other words, with the above configuration, by selectively replacing and using face plates of multiple specifications with different areas and opening shapes for the earth and sand intake, the aperture ratio and the shape of the earth and sand intake for the entire excavation equipment can be adjusted.
It can be changed appropriately according to the properties of the soil, for example, by using a face plate with a small opening area for sandy soil and a face plate with a large opening area for clayey soil. Regardless of the characteristics of the soil, it has become possible to improve the excavation driving force and transport of the soil, and to make the excavation more efficient.

Incidentally, as a configuration for changing the aperture ratio of the earth and sand intake of the excavation equipment, it is possible to attach a shutter structure that changes the opening area to the earth and sand intake, but in this case, the cutter drive structure and screw conveyor A complicated shutter structure must be provided in a narrow area where the tips of the shutters are close to each other, which is technically difficult, and there is a problem in that only the width of the opening can be adjusted. The structure of the present invention is that the face plate is detachably attached via fixing devices such as bolts, so the structure is extremely simple, and the openings formed can have various widths and shapes. An arbitrary intake port can be selected, and an excavation device with excellent adaptability to the properties of earth and sand can be easily constructed.

Next, embodiments will be described based on illustrative drawings.

FIG. 1 shows an excavation device 2 installed at the tip of a propulsion tube 1 that is pushed into earth and sand by an appropriate propulsion device in the propulsion method, and a rotary cutter 4 is installed at the tip of a cylinder 3 connected to the propulsion tube 1. Hydraulic motor M
A screw conveyor 6 is installed in the cylinder so as to be freely driven and rotatable around the axis P of the cylinder, and conveys and discharges the excavated soil introduced into the inner space of the cutter drum 5, which rotates integrally with the rotation of the cutter 4. It is installed inside body 3.

As shown in FIGS. 1 and 2, the cutter 4 is constructed by three cutter arms 8 to which the digging bits 7 are attached. The cutter arm 8 is arranged in a pointed shape on the cutter drum 5, and the center ends of the cutter arm 8 are integrally connected to each other via the center drilling bit 7A mounting member 9, and each of the outer ends in the radial direction is also used as a cutter drive interlocking body. They are connected to the circumferential portion of the front end side of the cutter drum 5 at equal intervals.

Then, a partial cone is formed to cover each of the fan-shaped openings formed by the adjacent cutter arms 8 and the front edge of the cutter drum 5 located between them, leaving a gap-like opening _A1 between the cutter arms 8 and the cutter arms 8. A planar face plate 10 is removably connected with bolts 11 to the mounting member 9 and the front edge of the cutter drum 5 on the inside and outside in the radial direction, and a slit-shaped opening is provided in the face plate 10 in a shape extending in the circumferential direction. A ₂ are arranged in a radial direction, and excavated earth and sand are introduced into the inner space of the cutter drum 5 through the gap-like opening A ₁ and the slit A ₂ formed in the face plate 10, and By arranging the slit-shaped openings _A2 to extend in the circumferential direction, gravel in the excavated soil can be smoothly taken in as the cutter 4 rotates.

Furthermore, by making _the face plate 10 removable, it is possible to selectively use face plates 10 with different specifications such as those shown in FIG. The face plates 10 are designed to be interchangeable and to be used properly depending on the properties of the earth and sand, so that good and efficient excavation can be carried out at all times.

Note that the shape and area of the earth and sand intake port _A2 formed in the face plate 10 can be changed in various ways other than those shown in FIG. The replaceable mounting structure for 4 can also be improved in various ways.

[Brief explanation of drawings]

The drawings show an embodiment of the drilling equipment for the propulsion method according to the present invention, in which Fig. 1 is a partially omitted vertical sectional view, Fig. 2 is an enlarged front view, and Fig. 3 A, B, C, and D are respectively. FIG. 3 is a diagram showing a replacement face plate. 3... Cylindrical body, 4... Rotating cutter, 5... Cutter drum, 6... Screw conveyor, 10...
...Face plate, 1... Propulsion pipe, 11... Fixture, A ₂ ... Sediment intake port.

Claims (1)

[Scope of utility model registration request] A rotary cutter 4 and a cutter drum 5 are provided at the tip of the cylinder 3 connected to the propulsion tube 1,
In the excavation device for the propulsion method in which a screw conveyor 6 for conveying the excavated earth and sand in the cutter drum 5 is provided in the cylinder body 3, a face plate 10 in which an earth and sand intake port _A2 into the cutter drum 5 is formed, Fixtures 11 provided inside and outside in the radial direction,
11. An excavation device for a propulsion method, characterized in that it is detachably attached to the cutter 4 and the cutter drum 5 via the cutter 4 and the cutter drum 5.