JPS6354872B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an excavation earth and sand transfer device used in earth pressure shield excavator construction, vertical steel pipe construction, and the like.

Conventionally, a screw conveyor or a ribbon screw conveyor is generally known as an excavation earth transfer device used in the above-mentioned earth pressure type shield excavator.

However, with the conventional device described above, it is impossible to transfer aggregates such as gravel that fill the inner diameter of the transfer casing (pipe) due to the internal drive shaft, screw blade, etc., and there are also restrictions on the quality of the soil to be transferred. It was hot. In addition, especially in the above-mentioned conventional equipment, since the drive mechanism for removing soil is located inside the transfer casing, it is constrained and naturally has a large resistance to removing soil, requiring a large rotational torque of the drive shaft, and there is a limit to the pumping force. .

Furthermore, in conventional equipment, the transfer pipe is a rigid body, so it is impossible to transfer in a curved line, and there are drawbacks such as blockages in the casing, troubles and failures of the drive device, etc., and maintenance and management of work construction is also very difficult. However, there were problems such as increased construction costs and construction times.

The present invention was made in view of the above, and an object of the present invention is to provide an excavating earth and sand transfer device as described below to solve the above-mentioned conventional drawbacks and problems.

The present invention includes an elastic telescoping cylinder that is extendable and retractable by operating a plurality of telescoping jacks installed around the outer periphery;
A telescoping earth and sand transfer machine consisting of valves connected to both ends of the elastic telescoping cylinder is connected to the excavator, and the excavated earth and sand is sequentially moved peristaltically by the opening and closing of each valve and the expansion and contraction movement of the elastic telescoping cylinder. An object of the present invention is to provide an excavating earth and sand transfer device which is characterized in that the earth and sand are transferred in a shape.

Next, embodiments of the present invention will be described in detail with reference to the drawings.

First of all, Figures 1 to 3 show the case of an earth pressure type shield excavator. 1 is an excavator installed inside the shield main body 8, and inside the conical cylindrical body 1a that gradually widens toward the front. A stirring screw 2 with a front cutter bit 3 which is rotatably driven by a hydraulic motor 10 is built in. 4 is a telescopic earth and sand transfer machine, which is constructed as follows. First, reference numeral 5 denotes a multi-stage cylindrical (bellows-shaped) elastic tube made of an elastic material such as rubber, which can be expanded and contracted, and each end of the elastic stretchable tube 5 has an opening/closing mechanism that can be opened and closed by combining adjacent flanges. The flexible valves 6 are connected to each other. A plurality of telescoping jacks 7 are installed around the outer periphery of the elastic telescoping cylinder 5 in such a way that a cylinder is attached to one flange with a grevis, and the tip of a piston rod is pivotally attached to the other flange. A telescoping earth and sand transfer machine 4 is constructed in which an elastic telescoping cylinder 5 can be extended and contracted by operation.

First, in the embodiment shown in FIG. 1, there is a case where a plurality of the above-mentioned telescopic earth and sand transfer machines 4 are connected in succession to the rear end of the excavator 1 to form a continuous transfer path A. In the embodiment of FIG. In each example, two rows (double rows) of pipes 4 are connected to the earth discharge pipe 13 in a manifold manner by intervening telescopic pipes 5a'. In the figure, 9 is a slurry injection pipe, 11 is a direction adjustment jack, and 12 is a fume tube or segment.

Next, the operating state in the case of the embodiment shown in FIG.
To explain the explanatory diagrams of Figures a and b, now Figure 5 a
As shown in the figure, when the valves 6a, 6b, and 6c are opened with their respective positions fixed, and the telescopic earth and sand transfer devices 4a and 4c are extended, and the telescopic earth and sand transfer devices 4b and 4d are contracted, the excavator 1 The excavated earth and sand is sucked into the extended elastic cylinder 5a, and the earth and sand in the elastic cylinder 5b is pushed out and sucked into the next elastic cylinder 5c. Further, the earth and sand within the elastic cylinder 5d is pushed out and discharged to the next rear direction. In the above case, the valves 6b and 6d are each closed.
Next, from the above state, as shown in Fig. 5b, the valve 6
a, 6c, and 6e are each closed while remaining in the fixed position state,
The valves 6b and 6d are opened, respectively, and the telescopic earth and sand transfer machines 4a and 4c are contracted, and conversely, the telescopic earth and sand transfer machines 4b and 4 are reduced.
When d expands, the earth and sand in the elastic cylinder 5a is pushed out and sucked into the next elastic cylinder 5b, and the earth and sand in the elastic cylinder 5c is also pushed out and sucked into the next elastic cylinder 5d. will be included. As the excavator 1 excavates in this manner, the excavated earth and sand are sequentially transported backward through the continuous earth and sand transport system path A in an intermittent peristaltic manner.

Next, the operating state in the case of the embodiment shown in FIG. 2 will be explained with reference to FIGS. 6 a, b, and c.
As shown in the figure, when the valve 6a is opened in a fixed position and the valve 6b is closed and the telescopic earth and sand transfer machine 4 is extended with the earth discharge pipe 13 fixedly held, the excavator 1
The excavated earth and sand inside is sucked into the elastic extensible cylinder 5.
Also, at this time, the telescopic pipe 5a' is contracted and the earth and sand inside is pushed out into the earth discharge pipe 13 at the rear. Subsequently, from the above state, as shown in FIG. 6b, the valve 6a is closed.
When the valve 6b is opened and the telescopic earth and sand transfer device 4 is contracted and the telescopic pipe 5a' is expanded, the earth and sand in the elastic telescopic cylinder 5 is pushed out and transferred into the rear telescopic pipe 5a'. Further, from the above state, the valve 6a is opened and the valve 6b is closed as shown in FIG. At the same time as being sucked into the earth and sand 5, the earth and sand in the telescopic pipe 5a' is pushed out into the earth discharge pipe 13 at the rear. In this way, the excavated earth and sand are successively and intermittently pushed into the earth discharge pipe 13 and sequentially discharged from the rear.

Although the explanation of the operation will be omitted, the second embodiment shown in FIG.
In the case of a continuous manifold type, excavation and earth transfer can be carried out in the same way, and in particular, when using a two-way type, continuous transfer and removal of soil is also possible by alternating operation. Furthermore, it is also possible to additionally install a device inside the earth discharge pipe 13.

Furthermore, the device of the present invention is capable of discharging earth and sand when constructing steel pipes and the like in vertical and inclined shapes (angular range from horizontal to vertical).

An example in the case of vertical steel pipe construction will be described with reference to FIG. 4 of the drawing. Reference numeral 14 denotes a recessed steel pipe, and the steel pipe 14 generally has a diameter of 1000φ to 1500φ and is most commonly used. In this method, as shown in the figure, the continuous transfer system A connected to the tip excavator 1 is connected to the earth removal pipes 13, 13.
An excavating earth and sand transfer device with an intervening earth and sand transport device is built into the steel pipe 14. In the figure, 11a is an excavator sinking jack, and 15 is a curved pipe at the upper end of the upper earth removal pipe 13, which opens above the earth and sand hopper 16 on the ground.

In the case of the above method, the excavator 1 and the steel pipe 14 are operated alternately to perform excavation and depression. Then, as in the case of the earth pressure shield system shown in Figs. 1 to 3, the excavated earth and sand is treated with a viscosity agent injected from outside the machine through the slurry injection pipe 9 and a water stop layer using the stirring screw 2. The earth and sand pushed up by Screw 2 after the water stopped is shown in Figure 6a,
The earth and sand are discharged to the earth and sand hopper 16 on the ground by the operation of the earth and sand removal device as explained in b and c.
Furthermore, it is possible to additionally install an earth removal device section within the earth removal pipe 13 depending on the depth of the steel pipe.

Since the present invention has the configuration described above, unlike conventional devices, it is possible to smoothly and easily transfer earth and sand including aggregates that fill the inner diameter of the transfer pipe, and it can be applied to any type of soil. In particular, this invention is a telescoping earth and sand transfer machine, and since the transfer pipe is constructed of an elastic cylinder, the transfer casing itself can be expanded and contracted in the circumferential direction and axial direction, and can be used even on curved sections. Because the earth and sand is transferred by the expansion and contraction of an elastic extensible cylinder, there is no restraining object such as an earth and sand transport device inside, so there is little soil removal resistance, and the structure is simple, so problems such as internal blockages and failures occur. It has outstanding effects such as excellent maintenance and management of construction works.

In addition, since a hydraulic telescopic jack is used as the pumping force for transferring earth and sand, a large pumping force can be obtained, which has the effect of contributing to shortening construction costs and construction periods.

Furthermore, in this invention, if the telescopic earth and sand transfer machines connected to the excavator are of a dual type with two rows, continuous earth removal is possible by alternate operation, which is convenient when the shield diameter is large and it is necessary to increase the earth removal efficiency. It is.

Moreover, this invention can be used for vertical construction as well as inclined construction of steel pipes, and can be utilized for multiple purposes, making it a significant contribution to this field.

[Brief explanation of the drawing]

The drawings show embodiments of the device of the present invention. Figures 1 to 3 are longitudinal cross-sectional views of each embodiment in the case of earth pressure type shield excavator construction, and Figure 4 is a vertical sectional view of each embodiment in the case of vertical steel pipe construction. 5A and 5B are longitudinal cross-sectional views, and FIGS. 5A and 5B are explanatory diagrams of the operating state in the case of the embodiment shown in FIG. 1, and FIGS. 1... Excavation machine, 1a... Conical cylindrical body, 2... Stirring screw, 3... Cutter bite, 4, 4a~
4d... Telescopic earth and sand transfer machine, 5, 5a, ~5d...
Elastic telescopic cylinder, 5a'... telescopic tube, 6, 6a, ~6
e... Valve, 7... Telescopic jack, 8... Shield body, 9... Slime injection pipe, 10... Hydraulic motor, 11... Direction correction jack, 11a
...Excavator sinking jack, 12...Huyum tube,
13...Earth removal pipe, 14...Steel pipe, 15...Bent pipe,
16...Sediment hopper, A...Continuous transfer system path,

Claims (1)

[Scope of Claims] 1. A telescoping earth and sand transfer device comprising an elastic telescoping cylinder that can be extended and contracted by operating a plurality of telescoping jacks installed around the outer periphery, and valves connected to both ends of the elastic cylinder. 1. An excavation earth and sand transfer device, characterized in that the machine is connected to an excavation machine, and excavated earth and sand are sequentially transferred in a peristaltic manner by opening and closing of each valve and expansion and contraction of an elastic cylinder. 2. The excavating earth and sand transfer device according to claim 1, wherein a plurality of telescopic earth and sand transfer machines are continuously connected to form a continuous transfer system. 3. The excavating earth and sand transfer device according to claim 2, wherein an extensible pipe is interposed in the continuous transfer system path to appropriately provide earth removal pipes. 4. The excavating earth and sand transfer device according to claim 1, wherein a double row of telescopic earth and sand transfer machines connected to the excavation machine are connected to the earth removal pipe in a manifold manner by intervening telescopic pipes.