JPH0575856B2 - - Google Patents

Description

[Detailed Description of the Invention] (1) Purpose The present invention is an earth and sand conveying device, in particular, a device for transporting earth and sand excavated by a face when burying underground pipes in urban sewage works, etc., to the ground in accordance with the advancement of the face. The present invention relates to an earth and sand conveying device suitable for transporting soil.

The work of transporting earth and sand to the ground in response to the advancement of the face is not only confined to a narrow working space but also has poor working conditions. , there is a demand for the development of a new unloading device.

Traditionally, when constructing sewers, soil and other materials were mostly transported using steel pipes using mud pumps, and if the construction conditions were right, direct pumping using pistons was also used.

Although fluid transport is extremely efficient in terms of transport efficiency, it requires solid-liquid separation of the discharged muddy water, which requires significantly large equipment and high processing costs. The drawback is that transportation itself is difficult.

On the other hand, the biggest advantage of the method of direct pumping with a piston is that it can transport the earth and sand as is. Because they are installed in series on steel pipes or their extensions, there are various difficulties. First, the seals must be made very tight to prevent dirt from coming into direct contact with the hydraulic cylinder.Also, since the negative pressure of the piston draws dirt into the pressure-feeding pipe, various gate valves including the piston must be sealed. It is necessary to increase the confidentiality of the information, and the mechanisms of those parts become complicated and expensive, and maintenance costs are also high. Second, since a hydraulic cylinder exists in series on the extension line of the earth and sand pumping pipe, it is difficult to provide a relay pressurizing device in the middle of the pipe in a narrow work space. As a result of not being able to perform relay pressurization in the middle of the pipe, thirdly, a large-capacity hydraulic system must be built into the tip face in order to overcome the resistance within the pipe due to the extended distance, which increases the size of the entire system. .

An object of the present invention is to eliminate the drawbacks of the above-mentioned conventional earth and sand conveying apparatus using a hydraulic piston, and to provide a conveying apparatus that can efficiently and safely discharge excavated earth and sand from an underground face, which is a narrow working space. There is a particular thing.

(2) Structure In the earth and sand conveying device according to the present invention, a spiral body is installed inside the earth and sand input box and reaches the cylindrical outlet in front of the input port to constitute a spiral delivery mechanism, and the spiral body is configured to open and close the cylindrical outlet. At the same time, a guide cylinder is guided out in front of the gate valve, and a discharge cylinder facing from the front of the guide cylinder via a relay sliding cylinder described later is supported on a fixed body, and the above-mentioned A movable body that moves forward and backward according to the operation of the reciprocating engine is interposed between the facing surfaces of the guiding cylinder and the discharge cylinder, so that the rear half is slidably fitted to the guiding cylinder and the front half is discharged. A relay sliding cylinder, which is slidably fitted to the relay cylinder, is supported on the moving body, and a gate valve is attached to open and close the relay sliding cylinder, so that the relay sliding cylinder is slidably fitted to the moving body, and a gate valve is installed to open and close the relay sliding cylinder. When the moving cylinder is closed, the cylindrical delivery port is opened, and this state is maintained even while the moving body is moving forward, and when the moving body is almost at its forward movement limit, the relay sliding cylinder is opened and the cylindrical delivery port is opened. By linking the driving engine of each gate valve with the reciprocating engine of the moving body so that the outlet is closed and this state is maintained even while the moving body is moving forward, the cylindrical outlet is closed while the moving body is moving forward. Structured so that earth and sand press-fitted into the rear half of the relay sliding cylinder via the guiding cylinder is pushed into the front half of the relay sliding cylinder and further pushed forward from the discharge cylinder while the moving body is retreating. I am forced to do so.

Referring to the drawings of the embodiment, reference numeral 1 denotes an earth and sand input box made of a steel plate, with an input port 2 opened at the top and a cylindrical outlet 3 made of steel pipe opened at the front. In this step, a guiding cylinder 3' made of steel pipe is led out. Inside the earth and sand input box 1, a spiral body 4 extending from directly below the input port 2 to the inside of the cylindrical outlet 3 is disposed horizontally to form a spiral delivery mechanism 5. Reference numeral 6 denotes a prime mover for rotating the spiral body 4 in a predetermined direction, and a hydraulic motor is used, for example. Reference numeral 7 denotes a discharge cylinder made of a steel pipe, which is supported on a fixed body 8 so as to face the guide cylinder 3' at a predetermined distance from the front. The fixed body 8 extends horizontally rearward and also serves as a pedestal for the spiral feeding mechanism 5, and maintains a constant distance between the facing surfaces of the guiding cylinder 3' and the discharging cylinder 7, as well as the movement described later. This serves as a guide rail when the body 9 moves forward and backward.
Reference numeral 10 denotes a conveying steel pipe connected to the front end opening of the discharge cylinder and extended to a predetermined discharge location. 1
1 is a relay sliding cylinder made of steel pipe, and the rear half 1
1a is slidably fitted into the guiding cylinder 3', and the front half 11b is slidably fitted into the discharge cylinder 7. In order to make the flow of earth and sand even smoother, the rear half 11b is slidably fitted into the guiding cylinder 3'. 11a is slid onto the outer periphery of the guiding cylinder 3', and the outer periphery of the front half 11b is connected to the discharge cylinder 7.
It is desirable to have a sliding fit on the inner periphery of the Reference numeral 12 denotes an elastic gasket attached to each fitting surface, and is made of a material such as a piston ring. The movable body 9 supports a relay sliding cylinder 11 between opposing surfaces of the guiding cylinder 3' and the discharge cylinder 7, and slides back and forth using the fixed body 8 as a guide rail. Reference numeral 13 denotes a reciprocating engine for moving the movable body 9 forward and backward, and is preferably a hydraulic cylinder or a hydraulic cylinder, for example. Reference numeral 14a is a gate valve attached near the front end of the cylindrical outlet 3, and controls the state of conduction between the outlet 3 and the guiding cylinder 3'. Reference numeral 14b is a gate valve attached to the center of the relay sliding cylinder 11, and controls the conduction state between the rear half 11a and the front half 11b of the sliding cylinder. 15a is a drive engine for opening and closing one gate valve 14a, and 15b is the other gate valve 1.
A drive engine for opening and closing 4b,
For example, a hydraulic cylinder or screw jack is suitable. Each gate valve 14a, 14 is operated alternately in conjunction with the operation of the reciprocating engine 13 by a hydraulic circuit as shown in FIG.
b are opened and closed alternately. More specifically, when the reciprocating engine 13 is driven in the extension direction and the relay sliding cylinder 11 together with the movable body 9 reaches almost its forward limit, one gate valve 14a is closed and the other gate valve is closed. The valve 14b is opened, and the relationship between these two gate valves is maintained as it is even while the drive of the reciprocating drive engine 13 is turned to the contraction direction and the relay sliding cylinder 11 is retreating together with the movable body 9. Ru. Then, together with the moving body 9, the relay sliding cylinder 11
When the valve reaches almost the retraction limit, one of the gate valves 14a
is opened and the other gate valve 14b is closed, and the relationship between these two gate valves is such that the drive of the reciprocating drive engine 13 is changed to the extension direction and the relay sliding cylinder 11 moves forward together with the movable body 9. It will continue as it is even while it is in progress. Reference numeral 16 denotes an air breather attached to the upper surface of the cylinder wall of the discharge cylinder 7.

Next, the operating mode of the device of the present invention will be explained according to A to H in FIG. 6. In FIG. However, the other gate valve 14b is in a closed state, and the earth and sand thrown into the earth and sand input box 1 from the input port 2 is transferred from the cylindrical outlet 3 by the rotation of the spiral body 4 as the prime mover 6 is driven. It is press-fitted into the guiding cylinder 3'. Both gate valves 14a, 14
When the relay sliding cylinder 11 starts moving forward in the direction of the arrow as shown in Fig. B with the moving body 9 while the above-mentioned relationship state b is maintained, as the sliding cylinder 11 moves forward, the guiding sliding cylinder 11 moves forward. The earth and sand within the cylinder 3' is gradually forced into the rear half 11a of the sliding cylinder. In Figure C, in which the relay sliding cylinder 11 reaches its forward limit together with the movable body 9, one gate valve 14a closes and the other gate valve 14b switches to open. Both gate valves 14a, 14
When the relay sliding cylinder 11 starts to retreat in the direction of the arrow as shown in Fig. D with the moving body 9 maintaining the above-mentioned relationship state b, as the sliding cylinder 11 moves back, the gate valve 14a as a reaction force, the sliding cylinder rear half 1
The earth and sand in 1a is forced into the front half 11b, and is then sequentially transferred into the discharge cylinder 7. When the relay sliding cylinder 11 reaches the retreat limit together with the movable body 9, one gate valve 14a changes to open operation, and the other gate valve 14b changes to close operation, as shown in Fig. E. While the relationship between the gate valves 14a and 14b is maintained, when the relay sliding cylinder 11 begins to move forward together with the moving body 9 in the direction of the arrow as shown in Fig. F, as the forward movement progresses, the sliding cylinder 11 moves forward. Second half 11a
Although the inside is in a vacuum state, the earth and sand sent out from the inside of the cylindrical outlet 3 fills the inside of the rear half 11a. Relay sliding cylinder 11 together with moving body 9
In diagram G, when the gate valve 1 has reached its forward limit, one gate valve 1
4a is closed, and the other gate valve 14b is opened. While the above relationship between the gate valves 14a and 14b is maintained, when the relay sliding cylinder 11 starts to retreat together with the moving body 9 in the direction of the arrow as shown in Figure H, the sliding cylinder 11 begins to retreat. Gate valve 1
4a as a reaction force, the earth and sand in the sliding cylinder 11 pushes the earth and sand in the discharge cylinder 7 forward, and transfers it into the transport pipe 10.

If the above-mentioned operation is repeated by automatically controlling the hydraulic circuit with a switching valve, the earth and sand will be transferred to the transport pipe 1.
0, it will be continuously transported to a predetermined discharge location.

Note that when implementing the device of the present invention, it is desirable to attach a water injection device, a lubricant injection device, a gravel crushing device, etc. to the input port 2.

(3) Effects The effects of the earth and sand conveying device of the present invention are as follows. First, a reciprocating engine 1 such as a hydraulic cylinder
3 is separated from the conveying pipe, there are no overflows in the pipe, and therefore, it is difficult to cause blockage of soil, and it can handle various soil properties, from solids such as gravel to soil with high moisture content. It can be transported regardless of the location. Secondly, since the spiral feeding mechanism 5 is used as the earth and sand sending mechanism, there is almost no need to maintain the confidentiality of each cylindrical sliding part that makes up the conveyance pipe, and the device can be made simple and compact. Can be installed even in cramped work spaces. Thirdly, since the earth and sand are pumped in a straight line, a plurality of the same devices can be connected at any point along the conveyance pipe, and the conveyance distance can be freely changed.

[Brief explanation of the drawing]

FIG. 1 is a side view of the device of the present invention, FIG. 2 is a plan view of the device of the present invention, FIG. 3 is an enlarged cross-sectional view of the cylindrical body fitting part of the device of the present invention, and FIG. 4 is a diagram of the device of the present invention. These are enlarged cross-sectional views of the gate valve attachment part of the device, where A shows an example in which a hydraulic cylinder is used as the drive engine, and B shows an example in which a screw jack is used in the drive engine. FIG. 5 is a hydraulic circuit diagram of the device of the present invention, and A to H in FIG. 6 are explanatory diagrams showing the operating mode of the device of the present invention. 1... Sediment input box, 2... Input port, 3... Cylindrical outlet, 3'... Guiding cylinder, 4... Spiral body,
5... Spiral feeding mechanism, 7... Discharge cylinder, 8...
Fixed body, 9... Moving body, 11... Relay sliding cylinder, 11a... Second half, 11b... First half, 13
...Reciprocating engine, 14a...Gate valve, 14b...
...gate valve, 15a...drive engine, 15b...drive engine.

Claims (1)

[Claims] 1 A spiral body 4 that reaches into the cylindrical outlet 3 in front of the input port 2 is installed inside the earth and sand input box 1 to constitute a spiral delivery mechanism 5, and a gate valve 14a for opening and closing the cylindrical outlet 3 is attached. At the same time, the guiding cylinder 3' is led out in front of the guiding cylinder 3', and the discharging cylinder 7 facing the guiding cylinder 3' is supported on the fixed body 8 via the relay sliding cylinder 11, which will be described later. ,
A movable body 9 that advances and retreats according to the operation of the reciprocating engine 13 is interposed between the facing surfaces of the guiding cylinder 3' and the discharging cylinder 7, so that the front half 11a can freely slide on the guiding cylinder 3'. and the front half 11
b supports the relay sliding cylinder 11 slidably fitted to the discharge cylinder 7 on the movable body 9, and is attached with a gate valve 14b for opening and closing the relay sliding cylinder 11. At almost the backward limit of the moving body 9, the relay sliding cylinder 11 is closed, and the cylindrical outlet 3 is opened, and this state is maintained even while the moving body 9 is moving forward. The driving engines 15a and 15a of each gate valve 14a and 14b are operated so that the sliding cylinder 11 is opened and the cylindrical outlet 3 is closed and this state is maintained even while the moving body 9 is moving forward.
15b is interlocked with a reciprocating engine 13 of a moving body 9.