JP6218409B2 - Method and apparatus for conveying excavated earth and sand - Google Patents

Description

The present invention relates to a method and an apparatus for transporting an object to be transported, and more particularly to a method and an apparatus for transporting excavated earth and sand suitable for transporting excavated earth and sand vertically 50 to 100 m.

For example, when the object to be transported is excavated earth and sand excavated by tunnel construction, a vertical conveyor screw conveyor is used to convey the excavated earth and sand from the bottom of the vertical shaft within the shaft (Patent Document 1). .
This screw conveyor for vertical conveyance is one in which a ribbon screw is rotatably incorporated in a cylindrical casing.
In the vertical conveying screw conveyor, generally, the cylindrical casing has a linear shape, and is used with its longitudinal direction oriented in the vertical direction.

JP 2005-22832 A

However, when the straight cylindrical casing is arranged vertically, when the depth of the vertical shaft is 50 to 100 m, the conventional vertical conveying screw conveyor cannot convey the excavated earth and sand.
That is, when the length of the cylindrical casing is increased to 50 to 100 m, the excavated sediment rises up to a certain height even if the excavated sediment is pushed into the cylindrical casing from the lower end of the cylindrical casing at the bottom of the shaft, In the above, even if the ribbon screw rotates, the excavated earth and sand remains at the same height, and only the ribbon screw is idled.

This is because there is a limit to the pushing force of the excavated earth and sand from the lower end of the cylindrical casing into the cylindrical casing and the upward force that raises the excavated earth and sand vertically by the rotation of the ribbon screw.
The present invention has been devised in view of the above circumstances, and the object of the present invention is to easily and reliably convey excavated earth and sand vertically upward even when the height of the vertically upward conveyance is 50 to 100 m. An object of the present invention is to provide a method and apparatus for transporting excavated sediment .

In order to achieve the above object, the present invention is a transport method for transporting excavated earth and sand vertically upward from the bottom of the shaft to the ground in the shaft, and standing a tower that reaches the ground at the bottom of the shaft, A cylindrical casing having a predetermined length extending in a straight line; a ribbon screw incorporated in the cylindrical casing; and a drive unit that is attached to the cylindrical casing and drives the ribbon screw. providing a plurality of configured screw conveyor, wherein the conveying path for conveying the excavated earth and sand upwards, with the plurality of screw conveyors which are arranged in the vertical direction in the longitudinal direction toward the vertical direction of the cylindrical casing, wherein the screw constituted by a plurality of connecting portions for connecting the ends to each other of the tubular casing of the conveyor while being bent, assembling the conveying path to the tower, the plurality of connecting portions And the tubular casing of the respective screw conveyors, extend to not be a vertical direction have the inclination angle of 20 degrees to 30 degrees with respect to the vertical direction, in the pit, the said plurality of screw conveyor plurality It is characterized by conveying excavated earth and sand vertically upward from the bottom of the shaft through the connecting portion .
The present invention is also a transport device for transporting excavated earth and sand vertically upward from the bottom of the shaft toward the ground in the shaft, the transport device being a tower that reaches the ground standing on the bottom of the shaft. The conveying device includes a cylindrical casing having a predetermined length extending in a straight line, a ribbon screw incorporated in the cylindrical casing, and the ribbon screw attached to the cylindrical casing. A plurality of screw conveyors configured to include a drive unit that drives the cylinder, and the cylindrical casing of each screw conveyor extends in the vertical direction with an inclination angle of 20 degrees to 30 degrees with respect to the vertical direction. And a plurality of connecting portions that are connected in a state where the ends of the cylindrical casing of the screw conveyor are bent.

According to the present invention, the conveying path for conveying the excavated earth and sand vertically upward is connected by a plurality of connecting portions, each of which is composed of a plurality of screw conveyors extending in the vertical direction while being inclined with respect to the vertical direction. Yes.
When each screw conveyor is inclined with respect to the vertical direction, when the cylindrical casing constituting each screw conveyor is cut along a plane orthogonal to the longitudinal direction, the inner peripheral surface of the cylindrical casing that forms the lower half of the cylindrical casing. However, it contributes to more efficiently transporting excavated earth and sand upward with respect to the ribbon screw incorporated in the cylindrical casing.
Therefore, even when the depth of the shaft becomes as large as 50 to 100 m, the inner peripheral surface of the cylindrical casing cooperates with the ribbon screw , so that the excavated earth and sand can be easily and reliably conveyed to the ground above vertically.

It is a front view of the conveyance apparatus of 1st Embodiment. It is a side view of the conveying apparatus of 1st Embodiment. It is a front view of the conveying apparatus of 2nd Embodiment. It is a side view of the conveying apparatus of 2nd Embodiment.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
This Embodiment demonstrates the case where the excavated earth and sand excavated by tunnel construction is conveyed toward the ground within a shaft.
Therefore, in the following embodiment, the conveyed object is excavated earth and sand excavated by tunnel construction.
The depth of the shaft is 50 to 100 m, and the excavated earth and sand is conveyed 50 to 100 m vertically upward from the bottom of the shaft toward the ground.
First, the method of the first embodiment will be described together with the apparatus with reference to FIGS.
A conveying device 10 that conveys excavated earth and sand vertically includes a hopper portion 12 into which excavated earth and sand are introduced, a plurality of vertical conveying pipes 14, and a plurality of connecting portions 16.

The hopper portion 12 includes a hopper main body 1202, a cylindrical casing 1204 protruding from the lower side surface of the hopper main body 1202, a ribbon screw 1206 inserted from the bottom of the hopper main body 1202 into the cylindrical casing 1204, and a ribbon screw A rotation drive unit 1208 for rotating and driving 1206.
The distal end of the cylindrical casing 1204 is connected to the lower portion of the vertical transport pipe 14 positioned at the lowest position.
The rotation drive unit 1208 includes, for example, a hydraulic motor, an electric motor, and a speed reduction mechanism.
The excavated earth and sand excavated by the tunnel construction is conveyed by, for example, a belt conveyor and is put into the hopper main body 1202.

The plurality of vertical transfer pipes 14 extend linearly in the vertical direction and are arranged in the vertical direction, and each is configured to be able to transfer the excavated earth and sand upward.
The vertical conveying pipe 14 includes a cylindrical casing 1402, a ribbon screw 1404, and a rotation driving unit 1406. In this embodiment, a screw conveyor is used for the vertical conveying pipe 14.

The cylindrical casing 1402 has a circular cross section and extends linearly with a predetermined length. In the present embodiment, the length of one cylindrical casing 1402 is 10 m. In the drawing, only four vertical conveying pipes 14 located at the lower part of the shaft are drawn, but when the depth of the vertical shaft is 50 m, for example, six to seven vertical conveying pipes 14 are used. When the depth is 100 m, 12 to 14 vertical conveying pipes 14 are used.
Note that the length of the cylindrical casing 1402 is not limited to 10 m. For example, when the length of the cylindrical casing 1402 is increased as appropriate within a range of 5 m to 20 m, a single cylindrical casing 1402 is used. It is optional to provide a plurality of rotation driving units 1406 on the front side.

The ribbon screw 1404 is incorporated in the cylindrical casing 1402. In the present embodiment, the ribbon screw 1404 corresponds to a conveying member incorporated in the cylindrical casing 1402.
In the present embodiment, the ribbon screw 1404 is an outer peripheral support system in which an outer peripheral portion thereof is rotatably supported on an inner peripheral surface of the cylindrical casing 1402.
The rotation drive unit 1406 rotates the ribbon screw 1404 and is attached to an intermediate portion in the longitudinal direction of the cylindrical casing 1402. In the present embodiment, the rotation driving unit 1406 corresponds to a driving unit that drives the conveying member.

The rotation drive unit 1406 includes, for example, a hydraulic motor, an electric motor, and a speed reduction mechanism. That is, the driving force of the hydraulic motor or the electric motor is transmitted to the speed reduction mechanism, and the drive gear of the speed reduction mechanism is connected to the tooth portion formed on the outer peripheral portion of the ribbon screw 1404 via the opening of the cylindrical casing 1402. By meshing, the ribbon screw 1404 is rotationally driven.
Therefore, in the present embodiment, a plurality of vertical conveyance paths that extend linearly in the vertical direction and are arranged in the vertical direction, each enabling the excavation soil to be conveyed upward, are each configured by the vertical conveyance pipe 14. ing.
The ribbon screw 1404 has a conventionally known structure such as one in which a spiral blade is attached around the center axis, and one in which a shaft portion is provided at the longitudinal end of the spiral blade without the center axis. Various types can be adopted, and the connection structure between the rotary drive unit 1406 and the ribbon screw 1404 is appropriately determined according to the type of the ribbon screw 1404 to be used.

The plurality of connecting portions 16 are provided at the ends of the cylindrical casings 1402 of the vertical conveying pipes 14 adjacent to each other vertically so that the cylindrical casings 1402 of the vertical conveying pipes 14 extend in the vertical direction while being inclined with respect to the vertical direction. The parts are connected together.
The ends of the cylindrical casings 1402 of the vertical conveying pipes 14 adjacent to each other in the vertical direction are connected to each other by the connecting portion 16 so that the cylindrical casings 1402 of the vertical conveying pipes 14 adjacent to each other in the vertical direction are vertically opposite to each other. It extends up and down while tilting.
In this Embodiment, the connection part 16 is comprised by piping curved in V shape.
One end of the pipe is connected to the lower end of the cylindrical casing 1402 of one vertical transfer pipe 14 adjacent in the vertical direction, and the other end of the pipe is connected to the cylindrical casing 1402 of the other vertical transfer pipe 14 adjacent in the vertical direction. Connected to the top.
The inclination angle θ for inclining each vertical conveying pipe 14 with respect to the vertical direction by the connecting portion 16 is advantageous in terms of simplifying assembly and balancing the conveying device 10 if all the connecting portions 16 have the same angle. Become.

  In addition, the conveying apparatus 10 including the plurality of vertical conveying pipes 14 and the plurality of connecting portions 16 described above is arbitrary, for example, by setting up a tower reaching the ground at the bottom of the shaft and assembling the tower. .

Next, operational effects will be described.
According to the present embodiment, the transport paths for transporting excavated earth and sand vertically upward are connected by the plurality of connecting portions 16, and each of the vertical transport pipes 14 extends in the vertical direction while being inclined with respect to the vertical direction. It consists of
When each vertical transport pipe 14 is tilted with respect to the vertical direction, the cylindrical casing 1402 that constitutes each vertical transport pipe 14 is cut in a plane perpendicular to the longitudinal direction, and in particular, a cylindrical shape that forms the lower half of the cylindrical casing 1402. The inner peripheral surface of the casing 1402 contributes so that the ribbon screw 1404 transports excavated earth and sand more effectively.
Therefore, even when the depth of the shaft is as large as 50 to 100 m, there is no problem that only the ribbon screw 1404 is idling and the excavated soil remains at the same height, and the inner peripheral surface of the cylindrical casing 1402 is a ribbon. By cooperating with the screw 1404, the excavated earth and sand can be easily and reliably conveyed to the ground above the vertical.

In addition, when the inclination angle θ for inclining each vertical conveying pipe 14 with respect to the vertical direction by the connecting portion 16 is small, although the conveying force of the excavated sediment in the vertical direction increases, the degree thereof is small.
On the other hand, as the inclination angle θ is increased, the contribution of the inner peripheral surface of the cylindrical casing 1402 to the upward force by which the ribbon screw 1404 raises the excavated earth and sand increases, and the conveying force of the excavated earth and sand vertically increases. However, when the inclination angle θ is increased, the diameter of the shaft must be increased, and the number of the vertical conveying pipes 14 to be used, that is, the number of the cylindrical casings 1402, the ribbon screws 1404, and the rotation driving units 1406 is increased. It will increase.
Therefore, when the diameter of the shaft is not increased, the number of the vertical transport pipes 14 is not increased, and the transport force in the vertical direction of the excavated soil is taken into consideration, the inclination angle θ is in the range of 20 degrees to 30 degrees. preferable.
Note that the inclination angle θ may be small when the moisture content of the excavated soil is low, depending on the water content ratio of the excavated sediment, and when the moisture content is high, the inclination angle θ is larger. preferable.

Next, a second embodiment will be described with reference to FIGS.
In the second embodiment, the configuration of the connecting portion 16 is different from that of the first embodiment, and the configuration of other portions is the same as that of the first embodiment. Therefore, the location is different from that of the first embodiment. Will be explained with emphasis.

In the second embodiment, the connecting portion 16 is constituted by a horizontal conveyance pipe 18.
The horizontal transfer pipe 18 extends in the horizontal direction intersecting the vertical direction and connects the lower end of one vertical transfer pipe 14 and the upper end of the other vertical transfer pipe 14 that are adjacent in the vertical direction, and each of the horizontal transfer pipes 18 is the horizontal side of the excavated soil. It is configured to enable conveyance in the direction.
When the horizontal conveyance pipe 18 intersects the vertical direction at an angle of 90 degrees with respect to the vertical direction, that is, when the horizontal conveyance pipe 18 is oriented in the horizontal direction, excavated earth and sand are placed on the lower end of the vertical conveyance pipe 14. The folding force to be pushed in is the largest, and in the present embodiment, the horizontal conveyance pipe 18 is oriented in the horizontal direction.
The horizontal conveyance pipe 18 is configured to include a cylindrical casing 1802, a ribbon screw 1804, and a rotation drive unit 1806, and a screw conveyor is used for the vertical conveyance pipe 14 in the present embodiment.

The cylindrical casing 1802 extends in a straight line with a shorter length than the cylindrical casing 1402 of the vertical conveyance pipe 14, and the longitudinal direction thereof is arranged in the horizontal direction.
One end in the longitudinal direction of the cylindrical casing 1802 is connected to the lower end of one vertical transport pipe 14 adjacent in the vertical direction, and the other end in the longitudinal direction is connected to the upper end of the other vertical transport path 14 adjacent in the vertical direction. Has been.

The ribbon screw 1804 is incorporated into the cylindrical casing 1802 and has a shaft portion at the end in the longitudinal direction thereof.
The rotation drive unit 1806 drives the ribbon screw 1804 to rotate, and is attached to the end of the cylindrical casing 1802 in the longitudinal direction.
The rotation drive unit 1806 includes, for example, a hydraulic motor, an electric motor, and a speed reduction mechanism. In this embodiment, the motor is directly connected to the shaft portion of the ribbon screw 1804, and the ribbon screw is driven by the driving force of the motor. 1804 is driven to rotate.
In the vertical conveyance pipe 14, it is preferable that excavated earth and sand be conveyed in the cylindrical casing 1402 at an appropriate filling rate. When the filling rate is high, the inside of the cylindrical casing 1402 is closed, and when the filling rate is low, the conveying efficiency is low. Decreases.
Therefore, the drive current of the motor constituting the rotation drive unit 1406 of the vertical conveyance pipe 14 is monitored, and when the fullness of the vertical conveyance pipe 14 becomes high and the motor is overloaded, the rotation of the horizontal conveyance pipe 18 is rotated. Decreasing the rotational speed of the motor constituting the driving unit 1806, weakening the pushing force of the excavated earth and sand to the lower end of the vertical conveying pipe 14 by the horizontal conveying pipe 18, returning the filling rate of the vertical conveying pipe 14 to an appropriate value, When the rotational speed of the motor constituting the rotation drive unit 1806 of the horizontal transport pipe 18 is restored to the initial rotation and the transport efficiency of the vertical transport pipe 14 is restored to the designed value, the transport of excavated earth and sand is performed. This is more advantageous for increasing efficiency.
The ribbon screw 1804 has a conventionally known structure such as one in which a spiral blade is attached around the center axis, and one in which a shaft portion is provided at the longitudinal end of the spiral blade without having the center axis. Various types can be adopted, and the connection structure between the rotary drive unit 1806 and the ribbon screw 1804 is appropriately determined according to the type of the ribbon screw 1804 to be used.

It goes without saying that the same effects as those of the first embodiment can be obtained by the second embodiment as well, and the following effects can be obtained in addition to the first embodiment.
Except for the vertical conveyance pipe 14 located at the lowest position, the horizontal conveyance pipe 18 is positioned between the vertical conveyance pipes 14 adjacent to each other in the vertical direction. Pushed in.
The pushing force of the excavated earth and sand by the horizontal conveying pipe 18 increases the conveying force of each vertical conveying pipe 14 that conveys the excavated earth and sand vertically upward.
Therefore, according to the second embodiment, it is more advantageous to easily and surely transport excavated earth and sand to the ground above vertically.

In the above embodiment, the case where the object to be conveyed is excavated earth and sand has been described. However, the object to be conveyed is not limited to the excavated earth and sand, and can be applied to various objects to be conveyed vertically upward. .
Moreover, although the case where the screw conveyor was used for the vertical conveyance pipe | tube 14 was demonstrated in this Embodiment, the vertical conveyance pipe | tube 14 is not limited to a screw conveyor, The form with which the member for conveyance was integrated in the inside of a cylindrical casing. However, the type of the transport device is appropriately determined according to the object to be transported, and the cross-sectional shape of the cylindrical casing is not limited to a circle, but is appropriately determined according to the transport member.

  DESCRIPTION OF SYMBOLS 10 ... Conveyance device, 12 ... Hopper part, 1202 ... Hopper main body, 1204 ... Cylindrical casing, 1206 ... Ribbon screw, 1208 ... Rotation drive part, 14 ... Vertical conveyance pipe, 1402 ... Cylindrical shape Casing, 1404... Ribbon screw, 1406... Rotation drive unit, 16... Connection unit, 18.

Claims (6)

In the shaft, a method of transporting excavated earth and sand vertically upward from the bottom of the shaft toward the ground,
A tower was built up to the ground at the bottom of the shaft,
A cylindrical casing having a predetermined length extending in a straight line; a ribbon screw incorporated in the cylindrical casing; and a drive unit that is attached to the cylindrical casing and drives the ribbon screw. Provide multiple screw conveyors configured,
The plurality of screw conveyors arranged in the vertical direction with the longitudinal direction of the cylindrical casing being directed in the vertical direction, and the end portions of the cylindrical casings of the screw conveyors for conveying the excavated earth and sand upward Consists of a plurality of connecting parts that are connected in a bent state,
Assembling the transport path to the tower,
The cylindrical casing of each screw conveyor is extended in the vertical direction with an inclination angle of 20 degrees to 30 degrees with respect to the vertical direction through the plurality of connecting portions,
In the shaft, the excavated sediment is conveyed vertically upward from the bottom of the shaft through the plurality of screw conveyors and the plurality of connecting portions, to the ground.
A method for transporting excavated sediment. The connecting portion is configured by a pipe curved in a V shape.
The method for transporting excavated earth and sand according to claim 1. The connecting portion is composed of a horizontal transfer pipe that extends in the horizontal direction and connects the lower end of one screw conveyor and the upper end of the other screw conveyor adjacent in the vertical direction,
The horizontal conveying pipe extends linearly and has a cylindrical casing having a length shorter than that of the screw conveyor, a ribbon screw rotatably incorporated in the cylindrical casing, and an attachment to the cylindrical casing. And a screw conveyor including a drive unit that rotationally drives the ribbon screw.
The method for transporting excavated earth and sand according to claim 1. In the shaft, a conveying device that conveys excavated earth and sand vertically upward from the bottom of the shaft toward the ground,
The transport device is assembled to a tower that is erected on the bottom of a shaft and reaches the ground,
The transfer device
A cylindrical casing having a predetermined length extending in a straight line; a ribbon screw incorporated in the cylindrical casing; and a drive unit that is attached to the cylindrical casing and drives the ribbon screw. A plurality of configured screw conveyors;
The ends of the cylindrical casings of the screw conveyor are bent so that the cylindrical casings of the screw conveyors extend in the vertical direction with an inclination angle of 20 degrees to 30 degrees with respect to the vertical direction. A plurality of connecting portions to be connected in a state in which
The excavation earth and sand conveyance apparatus characterized by including. The connecting portion is configured by a pipe curved in a V shape.
The excavation earth and sand conveying apparatus according to claim 4 . The connecting portion is composed of a horizontal transfer pipe that extends in the horizontal direction and connects the lower end of one screw conveyor and the upper end of the other screw conveyor adjacent in the vertical direction,
The horizontal conveying pipe extends linearly and has a cylindrical casing having a length shorter than that of the screw conveyor, a ribbon screw rotatably incorporated in the cylindrical casing, and an attachment to the cylindrical casing. And a screw conveyor including a drive unit that rotationally drives the ribbon screw.
The excavation earth and sand conveying apparatus according to claim 4 .

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