JPS626097A - Mud adding type shielding machine - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] Industrial Application Field The present invention is a system in which a storage chamber and a screw conveyor are always filled with a mixture of sludge and muddy material, and the mixture is efficiently (transferred) backwards to enable smooth excavation. be.

Conventional technology In general, mud-adding type shield machines have a partition wall on the back of the face plate to form a storage chamber, fill it with excavated waste, inject mud material and knead it with the waste to give fluidity, and then transport it by a screw conveyor. It is said to be a shield machine that has a mechanism for removing soil.

There are cases in which mud-adding shield machines are unable to excavate smoothly due to sludge being consolidated in the sludge storage chamber or adhering to the walls.

In addition, the slurry material may not be sufficiently kneaded with the slurry, and a mixture of the slurry and slurry material with good fluidity may not be obtained, making smooth excavation impossible.

Problems to be Solved by the Invention The present invention eliminates the above-mentioned drawbacks and improves the storage chamber by constantly filling the storage chamber and the screw conveyor with a mixture of sludge and muddying material, and efficiently transporting the mixture backwards so that smooth excavation can be carried out. It attempts to solve structural problems.

Means to solve the problem: Always move the waste taken into the excavated waste storage chamber, which is composed of a partition wall and a face plate, toward the center of the storage chamber and the direction of the partition wall.
A face plate support with a cross section that becomes smaller toward the rear of the storage chamber is installed to apply force, and a reflector that also serves as a slurry material spout is fixed to the outer wall of the storage chamber. This is a mud-adding shield machine that constantly fills the tunnel with a mixture of sludge and mud-adding material and efficiently transports it to the rear, allowing for smooth excavation.

Embodiment: A large number of cutting bits (1) are attached to the front surface of the face plate (4), which is formed with large openings (2) in several places, connecting the centers (3) and openings (2) of the face plate (4). A taper (5) is formed at the end of the face plate (4) so as to be sandwiched in the rear, and the outer periphery of the face plate (4) is connected integrally with an arc plate (6). A face plate supporter (7) having a fan-shaped cross section is fixed so that it becomes interposed as it goes in the direction, and the face plate supporter (7)
A ring gear (9) with a gear (8) carved inside is fixed to the rear end of the force.

Ql is rotatably attached to the bulkhead housing υ of the shield machine via a watertight bearing with the fixing ring of the face plate supporter (7). In the figure, the rear end of the face plate supporter (7) and the ring gear (9) are connected by a shaft (121), and the shirt (tdJ) passes through a fixing ring and is airtightly attached.

The space between the face plate (4) and the partition wall (11J becomes the sludge storage chamber (13).

The gear (8) of the ring gear (9) is engaged with the drive motor (one rotating shaft (161) attached to the drive gear liη, which is appropriately fixed in the work chamber I. The bulkhead aυ has an internal screw A fixed opening (2B.
) is driven by a screw conveyor (181), and the outer corner of the waste storage chamber u3 is shaped like a cone so that it has a small diameter as it approaches the partition wall αυ, and the rear end is fixed to the partition wall (11) K, and the reflection is reflected on the inner surface. Multiple plate systems are installed.Reflector plate■
A hole (24a) is bored in the center of the hole (24a), and a muddy material injection hose (24b) is connected and opened to the hole (24a).
24b) is connected to a mud pump (not shown).

(c) is the skin plate, (to) is the shield jacket,
(5) is a segment, (to) is a tail seal, ``rail'' is a rail, ■ is a zuritro, and (3]) is an earth pressure gauge.

To explain the flow of the excavated waste, the ground at the face is broken down by the cutting bit (1) attached to the face plate (4), and passes through the opening (2) of the face plate (4) into the storage chamber α. is stored in There is a taper (5) at the end of the opening (2) of the face plate (4).
), the shear is forcibly given a component force toward the storage chamber αJ by the rotation of the face plate (4). The sludge sent into the storage chamber a is given a force to move toward the center and rear of the storage chamber by the rotation of the face plate supporter (7) fixed to the face plate (4).

Reflector (2) outside the shield wall that does not rotate! (
It is fixed to C) and has the purpose of pushing back toward the center of the misaligned outer edge of the storage chamber 0, and is injected from the muddying material injection hose (24b) using the turbulent flow generated near the reflection plate 04. The muddying material can be efficiently mixed with the slurry, and the reflector Q1 is designed not to interfere with the drawing board support (7).

Then the screw conveyor (le is the waste removal port α)
It is then discharged into a slurry and transported outside.

The rotation of the screw conveyor U81 and the opening degree of the waste outlet outlet can also be controlled.

In the mud-adding type shield machine equipped with the above-mentioned components, the waste cut by the face is continuously fed into the storage chamber, sufficiently mixed with the mud-adding material, and then discharged from the screw conveyor.

Moreover, the earth pressure in the storage chamber can be controlled by adjusting the rotation speed of the screw conveyor, the opening degree of the outlet, and the rotation speed of the face plate. Furthermore, the compaction state inside the storage chamber can be determined using an earth pressure gauge, allowing for smooth excavation.

Effects of the Invention A0 In order to always apply a component force to transfer the waste taken into the storage chamber from the opening of the surface plate to the center of the storage chamber and to the rear, the face plate supporter has a cross section that becomes smaller toward the rear of the storage chamber.

b. The reflector fixed to the wall of the storage chamber has the effect of disturbing the shear, and since the reflector was installed at the point where the peripheral speed of the face plate support is the highest, turbulence occurs in the shear near the reflector, causing reflection. The muddy material ejected from the head of the plate is mixed efficiently.

For C1 and above, the waste taken into the storage chamber by b is mixed with the muddy material and efficiently flows to the screw conveyor. Therefore, the earth pressure pipe ring in the storage chamber can be controlled within a certain pulsation range by adjusting the amount of earth discharged by the screw conveyor.

[Brief explanation of the drawing]

Figure 1 is a cross-sectional view of the shield machine, Figure 2 is its front view, and Figure 3 is a cross-sectional view of the shield machine.
The figure shows a perspective view of the ring gear salt from the face plate.

Claims (1)

[Claims] (1) In order to always apply a component force toward the center of the storage chamber and the direction of the partition wall to the scraps taken into the excavated waste storage chamber, which is composed of a partition wall and a face plate, the cross section becomes smaller toward the rear of the storage chamber. A mud adding type shield machine equipped with a face plate supporter and a reflector that also serves as a mud adding material spout fixed to the outer wall of the storage chamber.