JPH01111998A - Agitating excavator - Google Patents

Abstract

PURPOSE: To improve the force-feeding of excavated sediment and to easily correct a cutter for rolling by rotating an agitating shaft directly coupled to a cutter rotating shaft, crushing and agitating clods of earth, and providing an opening bellow an excavator. CONSTITUTION: An agitating shaft 6 having agitating projection 5 on the outer periphery thereof is provided in a sediment transfer passage inside an excavator body 1 in such a way as to be coaxial with or directly coupled to a cutter rotating shaft. Clods of earth excavated by a cutter 10 are crushed, agitated, mixed well with excavated sediment and viscous material so as to have sizes, shapes, and properties suited for force-feeding, and fed into a sediment chamber 16. Grains of the sediment with relatively large diameters are discharge out of the excavator body 1 form an opening 19, and sediment flowing into a takeout chamber 176 through a screen 18 is forced out into a sediment force-feeding pipes 13 by sediment force-feeding devices 12, 14, 15.

Description

[Detailed Description of the Invention] (Industrial Application Field) This invention is a method for burying various types of pipe bodies, including pipes constituting cable storage conduits, in the ground using a propulsion method. position and excavate the earth and sand in front of the direction of movement,
This relates to a tunnel boring machine used to discharge excavated soil.

(Prior Art) Conventional excavators use a screw conveyor or belt conveyor to transport excavated earth backwards, and also use an earth pressure pump, etc. to discharge the excavated earth backwards.

(Problems to be Solved by the Invention) However, existing excavators have had the following problems.

First, in an attempt to downsize drive system equipment, if the leading cutter and the screw conveyor, which is the transfer means, are made into one system, that is, a coaxial type, the rotary shaft can only rotate in one direction due to the action of the screw conveyor. Therefore, the entire excavator tends to roll while digging, and even if rolling occurs, it is easy to correct it.

I become unable to correct myself.

To prevent this, if you want to enable the cutter to reverse in the normal direction, the drive system for the screw conveyor etc. and the cutter must be separated.As a result, two drive systems are required, and various devices in the drive system are It becomes bloated.

In addition, in the past, cut earth and sand were transported in their original form, so there was a risk that large gravel, clods, etc. would get into the earth and sand chamber and become an obstacle when being discharged to the rear.

Therefore, with this new type of excavator, the problem of how to reduce the size of the drive system equipment, make it easy to correct rolling, and deal with gravel, clods, etc. that become an obstacle when pumping earth and sand is solved. This is a problem that should be addressed.

(Means for Solving the Problems) This invention has been made in view of the above points, and does not specifically provide a transfer means for transferring the excavated earth from the leading cutter to the earth pumping device, but instead The problem was solved by installing a stirring shaft to break up and stir the soil clods, taking into consideration the location of the earth and sand pumping device, and installing an opening below the excavator.

Regarding its specific configuration, a stirring shaft is rotatably provided in the earth and sand transfer path within the excavator main body, and furthermore, a sand chamber is provided behind the stirring shaft, and an earth and sand pumping device is installed above the earth and sand chamber. In addition, an opening communicating with the outside of the excavator body is provided below the earth and sand chamber, and the stirring shaft is coaxial with or directly connected to the cutter rotating shaft.

(Function) When the drive device is activated, the cutter at the tip and the stirring shaft rotate at the same time, and when the entire excavator is propelled into the soil by the separately installed main push jack, the earth and sand cut by the cutter is moved into the excavation. As the aircraft moves forward, it is transferred to the rear. Therefore, the drive system only needs -.The earth and sand to be transferred at this time is stirred by the stirring shaft, and the viscous material and the excavated earth and sand are well mixed by the mixing effect, making it suitable for being pumped by an earth and sand pumping device such as an earth and sand pump. shape, size, and properties. At this time, of course, the soil clods are also broken into small pieces. Since there is an opening at the bottom of the earth and sand chamber that leads to the outside of the excavator, gravel and other earth and sand that cannot be pumped by the earth and sand pumping device are discharged from this opening to the outside, that is, to the ground. Become.

In addition, since the stirring shaft itself has no directionality, it can be reversed in one rotation, and if the excavator rolls during propulsion, it can be easily corrected by rotating the cutter in the opposite direction to the rolling direction. .

(Example) The present invention will be described in detail below. Reference numeral 1 denotes a substantially double-cylindrical excavator main body, which has a direction correction cylinder 3 in front thereof via a bellows seal 2, and a direction correction jack 4 supported by an inner cylinder 1a of the excavator main body 1. The direction correction tube 3 can adjust its direction as appropriate. A stirring shaft 6 with stirring protrusions 5 on the outer periphery is rotatably held in the center of the excavator main body 1, and the rear end of this stirring shaft 6 penetrates the bulkhead 7 at the rear of the excavator, and It is interlocked and connected to a drive device 8 installed at the rear lower part of the main body 1 by a universal joint 9.

On the other hand, the tip of the stirring shaft 6 is connected to a cutter 10 protruding from the front of the excavator main body 1, and when the drive device 8 is operated, the stirring shaft 6 and the cutter 10 rotate simultaneously. A slurry agent discharge hole 11 is located in front of the naori cane 10, and is configured to discharge the slurry agent sent from the starting side type mine.

An earth and sand pumping cylinder 12 is supported by both of the inner upper part of the excavator main body 1, that is, between the inner cylinder 1a and the outer cylinder 1b, and is slidable. Can be directly connected. This upper sand pressure feeding cylinder 1
A piston 14, which is slidable inside the piston 2, protrudes from a hydraulic jack 15 supported by the inner cylinder 1a. These earth and sand pumping cylinders 12, earth and sand pumping pipes 13. piston 1
4 and the hydraulic jack 15 constitute the earth and sand pumping device in this embodiment.

Further, an appropriate space is secured between the partition wall 7 and the end of the inner cylinder 1a, and this space constitutes a soil chamber 16, which is transported rearward as the excavator main body 1 advances. The excavated soil is blocked by the partition wall and remains under pressure in the soil chamber 16.

And the sliding space when the earth and sand pumping cylinder 12 slides and is directly connected to the earth and sand pumping pipe 13,
That is, the intake chamber 17 located above the sediment chamber 16 and the sediment chamber 1
A lattice-shaped screen 18 is provided between the intake chamber 6 and the intake chamber 17, and this screen 18 prevents large-diameter gravel from flowing into the intake chamber 17.

- The lower part of the sumo wrestler sand chamber 16 is provided with an opening 19 that leads to the outside of the excavator main body 1, that is, the part that becomes the ground during excavation. Further, a projecting plate 20 is provided on the outer periphery of the excavator main body l in front of this opening 19. This embodiment is constructed as described above.

If we explain the working situation of the embodiment, it is a driving device! ! When the excavator main body 1 is propelled from the abandoned mine into the soil by a separate pusher jack (not shown) while operating 8, the slurry agent discharge hole 1 is
The cutter 10 rotates while the slurry agent is discharged from the excavator 1 to cut the ground in front, and the resulting excavated soil is sufficiently mixed by the stirring protrusion 5 of the stirring shaft 6, and as the excavator main body 1 moves forward. It is transferred to the dirt chamber 16 at the rear.

These excavated soil that have reached the earth and sand chamber 16 are removed from the excavator main body 1.
As the excavator advances, it is gradually subjected to pressure by subsequent excavated soil that is mixed and transferred one after another, and at this time, relatively large diameter earth and sand are discharged from the opening 19 to the outside of the excavator main body 1.

On the other hand, the earth and sand rising due to the pressure is removed by the screen 18.
It flows into the intake chamber 17 through the earth and sand pumping cylinder 1.
The second outer cylinder 12a takes in the earth and sand from the intake chamber 17 while sliding toward the earth and sand pumping vibrator 13. After that, when it is completely directly connected to the earth and sand pumping vibrator 13, the piston 14 is pushed out by the hydraulic jack 15, and the taken-in earth and sand is pushed out into the earth and sand pumping vibrator 13 and discharged to the rear.

On the other hand, the excavated soil discharged from the opening 19 into the ground enters the surplus trench created by the direction correction and fills the surplus trench.
Therefore, there is no risk of ground subsidence.

In addition, in this embodiment, a protruding plate 20 is separately provided below the excavator main body 1 and in front of the opening 19, so even if no excess excavation occurs due to direction correction, the protruding plate 20
As a result, a clearance is created below the excavator main body 1, and the earth and sand discharged from the opening 19 is filled into this clearance. Therefore, opening 19
There will be no stagnation in the discharge of sediment from the area.

(Effects of the Invention) According to the present invention, since a stirring shaft with no rotational direction is employed, the cutter can be rotated in the forward direction and reversed, making it easy to correct rolling. Further, due to the mixing effect of this stirring shaft, the viscous material and the excavated soil are well mixed, resulting in properties suitable for earth and sand pumping.

In addition, since the earth and sand pumping means is installed at the top of the excavator body, the gravel falls downward, so that so-called "gravel jamming" does not occur, and this, combined with the mixing effect of the stirring shaft of Narijo, is good. This makes it possible to transport soil under pressure.

Moreover, since there is an opening at the bottom of the earth and sand chamber, part of the excavated earth and gravel can be discharged into the ground, reducing the amount of earth and sand discharged, and reducing the burden on the earth pumping equipment. Since the earth and sand discharged from the excavation area fills the excavation area, there is no risk of ground subsidence and the work can be carried out safely.

[Brief explanation of the drawing]

FIG. 1 is a partially sectional side view of the embodiment. In the figure, 1 is the excavator main body, 6 is the stirring shaft, 7 is the bulkhead, and 8
10 is a drive device, 10 is a cutter, 12 is an earth and sand pumping cylinder, 13 is an earth and sand pumping vibrator, and 14 is a piston. 15 is a hydraulic jack, 16 is a sand chamber, and 19 is an opening.

Claims (1)

[Claims] A stirring shaft is rotatably installed in the earth and sand transfer route inside the excavator main body, and a sand chamber is provided behind the stirring shaft, a sand pumping device is installed above the earth and sand chamber, and an earth and sand pumping device is installed below the earth and sand chamber. 1. An agitation excavation machine, characterized in that an opening leading to the outside of the machine body is provided, and the agitation shaft is coaxial with or directly connected to a cutter rotating shaft.