JP2542108Y2 - High water content mud discharge device - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a discharge device which discharges a high amount of water-containing mud discharged from a shield work, an underground wall construction site, and the like, and is excellent in closure and watertightness.

[0002]

2. Description of the Related Art Conventionally, as this type of discharge device,
What is shown in FIG. 7 or FIG. 8 is generally used. The discharge device shown in FIG.
The hopper gates 51, 52 are provided at the bottom discharge ports of the hopper 50 so as to be rotatable around the rotation shafts 51a, 52a, and the hopper gates 51, 52 are rotated by hydraulic cylinders 53, 54 attached to the outer peripheral surface of the hopper 50. By
It discharges the stored material in the hopper. The discharge device shown in FIG. 8 is provided with a gate plate 61 movable at the bottom discharge port of the hopper 60 by a hydraulic cylinder (not shown) or the like.
It discharges the stored material. Further, there may be a case where the gate plate 61 is provided double in the vertical direction in order to maintain airtightness or the like.

On the other hand, in recent shield construction, for example, the use of a mud pressure shield construction method for stabilizing a face by adding an additive for promoting plastic fluidization to excavated earth and sand has been increasing. In many cases, pipes are transported from the shield face to the earth and sand hopper outside the pit using a pumping pump or the like. In this construction method, as described above, since the clay material mainly composed of clay mineral is added as a sliding material to the excavated residual soil, the excavated residual soil has a high water content and is in a state of being easily fluidized. In addition, the excavated mud is subjected to press processing or chemically solidified and discharged in a subsequent processing step.

[0004]

However, first of all, in the case of the above-described discharge device, the amount of the discharged soil cannot be controlled because the discharge amount cannot be controlled or difficult, so that the solidification device cannot be used. There has been a problem that the solidification material mixing ratio fluctuates due to an inconsistent supply amount, the physical properties of the solidification material are not uniform, and furthermore, the working environment is deteriorated due to an overflow at the time of loading the truck.

[0005] Second, the discharging device is mainly used for powder and
The hopper gates 51 and 52 are intended to discharge the granules, and in the case of the high water content mud to be discharged in the present invention.
The muddy water and mud flow out of the gap, and the working environment deteriorates, so that the muddy water cannot be suitably used for high water-containing mud. Also, in the case of the slide gate type shown in FIG. 8, mud is caught in the concave groove 60 a into which the tip end of the slide gate 61 is fitted, and the closing by the slide gate 61 becomes insufficient, so that the closing property and There is a problem that watertightness cannot be secured.

Accordingly, the main problem of the present invention relates to the discharge of mud having a high water content, such as excavated mud from a shield face, and the discharge amount from a hopper can be quantitatively controlled, and the closure and watertightness are excellent. An ejection device is provided.

[0007]

Means for Solving the Problems The present invention has solved the above problems.
Ming high water content mud discharge device stores high water content mud
Discharge duct that is provided below the discharge port of the hopper
And a different position vertically separated from this discharge duct
A gate plate accommodating section provided in, on one deviation in the movement direction
Upper and lower through holes are formed and no through hole is formed near the other side
It has a closing part, and furthermore, each said gate plate accommodating part has a sliding surface.
A position where the through hole is apart from a position facing the discharge duct.
A gate plate of the upper and lower stages reciprocating between the location of these
A gate plate driving device for reciprocating each gate plate individually;
And each of the gate plate housings is provided with a corresponding gate plate.
It is characterized in that it surrounds liquid-tightly in the reciprocating area.
It is a sign.

[0008]

[Action] gate plate in the present invention has a hole and the closure portion, and said through hole and the closing portion by a reciprocating gate plate,
Performs discharge control by positioning each the exhaust duct communicating with the hopper outlet, the through hole is discharged
A gate plate housing is provided to surround the through-hole side gate plate when located outside the outlet duct . Therefore, the discharge duct
When moving from the open state to the closed state,
The mud that bites into the through-hole is
Is temporarily stored in the closed space between the
However, when the gate plate moves during the next opening operation,
As the holes move into the discharge duct, mud is discharged.
The gate plate receiving section according to the present invention is
Mud matter which is a problem in the conventional example shown in FIG.
Is no longer bitten. Furthermore, this point and the game of the present invention
In the reciprocating area of the corresponding gate plate,
In combination with the liquid-tight surrounding, the closing property and water-tightness of the gate are ensured, and scattering of muddy water and the like is eliminated. Also, in the present invention, especially in the vertical direction
It has a two-stage gate plate, and these gate plates
Since these are reciprocated individually by the plate drive, these two
Opening / closing control by linking two gate boards,
With the closed part of the gate plate facing the discharge duct, and the upper gate plate
With the through hole facing the discharge duct and high water content on the lower gate plate
Drop the mud, then move the upper gate plate
After the closed part faces the discharge duct, the lower gate plate is moved.
To make the through-hole face the discharge duct,
High water content mud between lower gate plates
It falls from the through hole of the board. In this state, the upper gate plate
Since the discharge duct is partitioned,
Only the high water content mud in the gate plate space is through the lower gate plate
It is possible to discharge a fixed amount by falling from the container. This point
In addition, it is noted that high hydrous mud covered by the present invention
As for the types, as the construction progresses, the size and
The physical properties of mud, such as water ratio, change. As a result,
Fluidity and adhesion change significantly. On the other hand, highly moist mud
Has a relatively high specific gravity, which is
(Not the total amount) when discharging in a fixed amount
The discharge amount (discharge speed) depends on the storage amount (storage height)
Degree) changes. Therefore, simply install one gate plate.
To discharge quantitatively only at the opening and closing timing
In addition, it is technically and equipment cost
Because it is extremely difficult to implement quantitative discharge control,
I can't. However, according to the present invention, based on the above-described principle,
Thus, quantitative discharge control can be performed very easily.
In addition, the fluidity and adhesion of highly hydrous mud changed significantly.
In the case, the opening and closing timing of the upper and lower gate
Being able to control has great advantages. High water content mud
If the soil is highly fluid, open the upper and lower gate plates.
Shorten the repetition timing of closing, and vice versa
I do. If the adhesion of highly hydrous mud is large,
Extend the timing of opening and closing the two-stage gate plate,
Conversely, if it is small, shorten it. Furthermore, this highly hydrated mud
When the fluidity of the earth is small and the adhesion is large
After closing the exhaust duct with the lower gate plate,
Increase the time required to close the plate,
In the case of low adhesion, the exhaust duct is
After closing, shorten the time to close the upper gate plate.
In addition, the fluidity is poor and the adhesion is extremely large.
If there is a concern, temporarily remove the through holes in both gate plates.
By using the pressure of the mud in the hopper
It is possible to prevent the blockage by discharging the gas at a stretch.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to embodiments shown in the drawings. In FIG. 2, the discharge duct 1 below the hopper 1
a is provided with upper and lower two-stage gate valves 2 and 3. As shown in detail in FIG. 3, the gate valves 2 and 3 are provided with gate plates 20 and 30 for opening and closing the passage of the discharge duct 1a. The gate plate 2
0, 30 are the gates of the present invention connected to the base end side.
The hydraulic cylinders 4 and 5 as plate driving devices are reciprocated by expansion and contraction operations. Further, the gate plate 2
As shown in FIG. 4, reference numerals 0 and 30 denote closed portions (non-processed portions) in which no through holes are formed in the base half of the plate in plan view.
And a through hole 20a is formed on the tip side, and when the closing portion overlaps with the communication passage of the discharge duct 1a according to the sliding of the gate plates 20, 30,
The discharge of the mud is closed, and the through hole 20a is connected to the discharge duct 1
When it overlaps with the communication passage a, a vertical communication portion is formed to discharge mud. The ab of the through hole 20a
The side is formed in a tapered shape inclined with respect to the gh piece of the duct passage, thereby enhancing the shearing property of the mud.

As shown in FIG. 1, the gate plates 20, 30 reciprocate within a range penetrating the discharge duct 1a and protruding to the opposite side of the discharge duct 1a.
A gate plate accommodating portion surrounding the gate portion on the side where the through holes 20a of 0 and 30 are formed is provided. As shown in the cross-sectional view of FIG.
A plate-shaped space that is continuous with the communication path of the discharge duct 1a is formed by the base plate 31, the lower holding plates 22, 33, and the side plates 23, 33 interposed between the two plates.
The gate plates 20 and 30 reciprocate while sliding in the plate-like space. Further, the gate plate 2
At the opening of the gate plate receiving portion into which the gate plates 0 and 30 are inserted, the holding plates 21 and 3 are sandwiched by the gate plates 20 and 30.
Water tightness is maintained by the gland packings 24, 34 fixed to the side 1 and the holding down plates 22, 32. Further, in this embodiment, as shown in FIGS. 3 and 5,
A receiving gutter 8 is provided for muddy water leaking from the tip of the storage case due to the pressure caused by the reciprocating motion of the gate plates 20 and 30,
The leaked mud water is led directly to the screw conveyor 7.

In discharging the high-water content mud under such a discharging device, first, while the lower-stage gate valve 3 is closed, the upper-stage gate valve 2 is operated by operating the hydraulic cylinder 4.
Is opened, and the lower gate valve 3
After the high-water content mud is allowed to flow to the position, the upper gate valve 2 is closed. Next, when the lower gate valve 3 is opened, the high water content mud in the space partitioned by the gate valves 2 and 3 falls onto the screw conveyor 7. After confirming the fall, close the lower gate valve 3 and
Finish the mud discharge of the cycle. By repeating the above operation, it is possible to always discharge the hopper 1 at a constant rate. Further, by counting the number of times of the discharge cycle, the amount of discharged soil can be measured. In addition, the discharge capacity from the hopper 1 can be appropriately adjusted by changing the operation cycle time of the hydraulic cylinders 4 and 5.

The high water content mud discharged from the discharge duct 1a falls on the screw conveyor 7 and is conveyed to the mud solidifying device 12 by the conveyor 7. In addition, along with the supply of the high water content mud to the mud solidifying device 12,
The solidified material in the solidified material hopper 9 is cut out by the screw feeder 10 and mixed into the high water content mud via the solidified material chute 11. The high water content mud and the solidified material are mixed in the mud solidifying device 12, dehydrated and solidified by a chemical reaction, and then loaded on the truck 14 and carried out. Meanwhile, as the solidifying material, a cementing material, a lime-based solidifying material, or the like can be used.

[0013]

[Effects of the Invention] As described in detail above, according to the present invention, it is possible to control the quantitative discharge of high water content mud stored in the hopper. In addition, it is possible to prevent the discharged mud from being caught, to reliably close the high-water-containing mud at the gate portion, and to secure watertightness.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a cut-out portion of the discharge device of the present invention.

FIG. 2 is a schematic diagram of a mud solidification system using the discharge device of the present invention.

FIG. 3 is an enlarged view of a main part of the discharge device of the present invention.

FIG. 4 is a view taken along the line AA of FIG. 3;

FIG. 5 is a view taken along line BB of FIG. 3;

FIG. 6 is a view taken along line CC of FIG. 3;

FIG. 7 is a side view of a conventional discharge device.

FIG. 8 is a longitudinal sectional view of a conventional discharge device.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Hopper, 2 ... Upper gate valve, 3 ... Lower gate valve, 4.5 Hydraulic cylinder, 7 Screw conveyor, 8 Muddy water receiving gutter, 9 Solidified material hopper, 12 Mud solidification device

Claims (1)

(57) [Scope of request for utility model registration] 1. A discharge port of a hopper for storing high water content mud.
Discharge ducts that are provided below and at different positions vertically separated from each other
The gate plate receiving part , the upper and lower through holes are formed on one side in the moving direction and
A closed portion where no through hole is formed, and
The through hole is the discharge duct
Upper and lower stages that reciprocate between a position facing
Gate board and gate board drive to reciprocate each of these gate boards individually
And a device, wherein each of the gate plate receiving sections is provided with a
Characterized by surrounding the area in a liquid-tight manner
High water content mud discharge device.