JP2010013289A - Method and apparatus for conveying material to be conveyed - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To propose a conveying technology for efficiently conveying wide-ranging kinds of conveyed material without being influenced by the high/low degree of viscosity. <P>SOLUTION: A screw auger 4 is rotatably stored in an auger casing 1 formed with an intake port 2 and a discharge port 3 at both ends, and a vacuum generating source 10 is connected to the discharge port 3 communicating with a spiral space in the casing 1. Both forces of push-out force caused by frictional force with a blade 6 of the screw auger 4 and a vacuum suction force acting over the whole length of the spiral space in the auger casing 1 are applied to convey the conveyed material. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a conveyance method and a conveyance device for an object to be conveyed.

  As a method for transporting excavated soil, an auger transport method and a pipe pressure feed method are known. In the former, the auger is inserted into the auger casing and conveyed by utilizing the frictional force with the spiral blades of the auger, and the latter is conveyed by conveying the pumping force of the pump to the excavated soil.

  The conventional excavated soil transport technology described above has the following problems.

<A> The auger transport system is suitable for transporting clay and the like, but in the case of sandy soil with low viscosity, a sufficient frictional force cannot be ensured, so transport is impossible. The pipe pumping method is suitable for transporting low-viscosity soil, but is not suitable for transporting high-viscosity soil. Therefore, it is necessary to use different transport methods depending on the soil to be transported.
<B> When transported by a pipe pumping system, it is necessary to remove the pipe for easy excavation of the excavated soil and cleaning. Further, a method of conveying excavated soil in a slurry is also known, but there is a problem that excavated soil is easily separated and clogged.

An object of the present invention is to propose a transport technique capable of transporting a wide variety of objects to be transported without being affected by the level of viscosity.
Still another object of the present invention is to provide a transporting technique for a transported object that can efficiently transport the transported object while avoiding a blockage accident of the transported object.

That is, the invention according to claim 1 is a method for transporting an object to be transported that is transferred along an inner space of a casing, wherein a screw auger is accommodated in a casing having intake and discharge ports formed at both ends. A spiral plate is formed, and a rotating plate larger in diameter than the auger casing that rotates integrally with the screw auger shaft is provided on the inlet side of the auger casing , and the object to be conveyed is scraped to the inlet port on the rotating plate. The scraping blades are set up in a standing manner, and the scraping blades are connected by an annular plate, acting over the entire length of the helical space in the auger casing and the pushing force due to the frictional force between the blades of the screw auger A method for transporting an object to be transported is characterized in that both the negative pressure suction force and the force to be applied are applied to the object to be transported.
The invention according to claim 2 is the method for transporting an object to be transported according to claim 1, wherein the object to be transported is earth and sand.
According to a third aspect of the present invention, there is provided a transporting device for an object to be transported that moves along an inner space of a casing. A negative pressure source is connected to the discharge port communicating with the spiral space inside, and a rotating plate having a diameter larger than that of the auger casing rotating integrally with the screw auger shaft is provided on the intake port side of the auger casing. On the plate, a scraping blade that rakes the object to be conveyed to the intake port is erected, connected between the scraping blades with an annular plate, and a pushing force caused by a frictional force between the blades of the screw auger, A transporting device for a transported object, wherein the negative pressure suction force generated over the entire length of the spiral space in the auger casing is applied to the transported object.
According to a fourth aspect of the present invention, in the conveying device according to the third aspect, an outer casing is provided on the auger casing, and a nozzle that injects fluid toward the intake port of the auger casing is provided between the peripheral surfaces of both casings. It is the conveyed apparatus of the conveyed product characterized by having performed.
According to a fifth aspect of the present invention, there is provided a transporting device for an object to be transported along the inner space of the casing, wherein the transporting device according to any one of the third to fourth aspects is connected to the soil removal side of the excavator. It is the conveyed apparatus of the conveyed product characterized by having performed.

[Embodiment 1 of the Invention]
<I> Conveying device.
FIG. 1 shows a model diagram of the transport apparatus.

Reference numeral 1 denotes an auger casing, which has an intake port 2 on one side and a discharge port 3 on the other side.
Although this example shows the case where the auger casing 1 is placed vertically, it may be placed horizontally or diagonally.

    A screw auger 4 is rotatably inserted in the auger casing 1. The screw auger 4 includes a shaft 5 through which the auger casing 1 is inserted, and a blade 6 formed in a spiral shape on the peripheral surface of the shaft 5. A rotational drive source 7 is connected to the end of the shaft 5 passing through the auger casing 1. Then, it receives this rotational force and reverses forward and backward.

A vacuum pump 10 driven by a motor 9 is interposed in the transport pipe 8 connected to the discharge port 3.
The negative pressure generated by the vacuum pump 10 acts on the spiral space defined in the auger casing 1 through the transport pipe 8.

<B> Transport principle.
In the above configuration, when the rotary drive source 5 and the vacuum pump 10 are driven in a state where the intake port 2 is positioned in the transported object 11 such as excavated soil, the screw auger 4 rotates in the auger casing 1. At the same time, a negative pressure toward the discharge port 3 is generated in the spiral space in the auger casing 1.

  As a result, both the pushing force due to the frictional force between the screw auger 4 and the blade 6 of the screw auger 4 and the negative pressure suction force act on the conveyed object 11 entering from the intake port 2. In particular, both of these forces are not part of the auger casing 1 but act over the entire length of the helical space as shown by the arrows in FIG. The conveyed object 11 that has received both these forces is efficiently transferred along the spiral space.

  When the transported object 11 is, for example, low-viscosity sandy soil, dredging, or the like, even if a sufficient frictional force by the screw auger 4 cannot be secured, the negative pressure suction force can be efficiently transferred toward the discharge port 3 as a main component. .

<C> Conveyed object.
When the object to be conveyed 11 is, for example, highly viscous clay, it can be transferred only by the transfer force of the screw auger 4, but the driving force of the screw auger 4 is reduced by increasing the negative pressure suction force. However, it can be transferred efficiently.

When the transported object 11 is, for example, low-viscosity sandy soil or the like, even if a sufficient frictional force cannot be ensured with the screw auger 4, it can be efficiently transferred mainly using a negative pressure suction force.
Even in this case, the transfer force by the screw auger 4 is not exhibited at all, and it naturally acts on the conveyed object 11 in cooperation with the negative pressure suction force.

  Further, even when the object to be transported 11 is the above-described mixed earth, sand or sand with high moisture content, it can be efficiently transferred in the same manner.

  In general, in the case of a transported object in which earth and sand are difficult to transport, it is transported in a slurry, but a slurrying facility and a facility for separating and recovering the transported object from the slurry are required. It becomes unnecessary.

  In this example, the case where the object to be transported 11 is earth and sand will be described. However, the object to be transported 11 includes various aggregates for plants, granular materials such as powder and grains, various slurry materials having viscosity, and the like. However, it is not limited to earth and sand.

<D> About occlusion.
Here, the obstruction | occlusion property in the auger casing 1 is considered.
In general, the clogging of the pipe occurs mainly due to the meshing of the lump separated from the transported object 11 and the accumulation of attached soil in the auger casing 1.
Separation of the transported object 11 is caused by insufficient transfer force with respect to the lump, and accumulation of attached soil is caused by long-term use.

  As described above, in the present invention, two types of forces having different properties of the pushing force and the negative pressure suction force due to the frictional force of the screw auger 4 act as a substantially uniform transfer force over the entire length of the spiral in the auger casing 1. .

  For this reason, since the transfer force that causes the masses to be engaged does not become insufficient, separation of the transported object 11 is difficult to occur.

Further, the auger casing 1 facing surface (end surface) of the blade 6 constituting the screw auger 4 scrapes the adhering soil when passing through the entire inner peripheral surface of the auger casing 1, so that even if it is used for a long time, Accumulation does not occur.
As described above, the present invention does not cause the blockage, and therefore the blockage does not occur in the auger casing 1.

[Embodiment 2 of the Invention]
Other embodiments will be described below. In the description, the same parts as those of the above-described embodiments are denoted by the same reference numerals, and detailed description thereof will be omitted.

2 and 3 show another conveying apparatus provided with means for collecting the object 11 to be conveyed.
In this example, a rotating plate 11 having a diameter larger than that of the auger casing 1 is provided on the intake port 2 side of the auger casing 1 and forced toward the intake port 2 of the auger casing 1 by a scraping blade 12 standing on the rotating plate 11. In other words, the transported object 11 is scraped.
The number of the scraping blades 12 is set as appropriate according to the type of the object 11 to be conveyed.
When a plurality of scraping blades 12 are provided, it is desirable to reinforce by connecting the scraping blades 12 with an annular plate 13.

The rotating plate 11 is connected to the shaft 5 of the screw auger 4 penetrating the auger casing 1 and rotates upon receiving the rotation of the screw auger 4.
Further, the scraping blade 12 is attached so as to be offset with respect to the rotation center of the rotating plate 11, thereby giving a scraping force.

  Both the negative pressure suction force and the transfer force by the screw auger 4 act in the auger casing 1 as in the first embodiment described above.

In this example, along with the rotation of the rotating plate 11, the scraping blades 12 erected obliquely with respect to the rotation direction scrape the surrounding conveyed object 11 and forcibly toward the intake port 2. Can be guided to.
Further, since the rotational force of the rotating plate 11 is obtained from the screw auger 4, no separate rotational drive source for the rotating plate 11 is required.

Embodiment 3 of the Invention
4 and 5 show another embodiment in which the conveying apparatus shown in the second embodiment is improved.
In this example, an outer casing 15 in which an intake port 14 is formed is provided around the auger casing 1, and a plurality of nozzles 16 are arranged between the peripheral surfaces of both casings 1, 15. It was comprised so that fluids, such as air, could be ejected toward No.1.

  According to this example, since the conveyed object 11 that has entered through the intake port 14 of the outer casing 15 can be transferred to the auger casing 1 by the fluid injection force, the taking-in performance into the auger casing 1 is further improved.

[Embodiment 4 of the Invention]
FIG. 6 shows another embodiment in which the above-described transport device is connected to the soil removal side of a known excavator.
In the figure, reference numeral 17 denotes a pilot excavator connected to the lower end of the outer casing 15, and reference numeral 18 denotes a widening excavator installed on the outer casing 15 on the upper side of the pilot excavator 17.

The pilot excavator 17 includes a casing 19 that is integrally fixed to the outer casing 15, and a down-the-hole hammer 20 that is swingably provided on the casing 19. Yes.
The pilot excavator 17 is equipped with a stabilizer device 21, a reaction force device (not shown), and a swinging means.

  The widening excavator 18 cleans the skin plate 22 and the widening excavator 23 rotatably provided at the lower part of the skin plate 22 so that a large-diameter hole can be preceded by a bit equipped with the widening excavator 23. It has become.

The excavated soil generated by the pilot excavator 17 is discharged to the outer periphery of the casing 19 and then taken into the widened excavator 18.
Excavated soil excavated by the widening excavator 23 is also taken into the machine and taken into the outer casing 15 through the intake port 14.
The excavated soil taken into the outer casing 15 is guided into the auger casing 1 through the already-described scraping blades (not shown) or by the jet fluid of the nozzles (not shown).

  As described above, the transfer is performed by both the negative pressure suction force acting in the auger casing 1 and the transfer force by the screw auger 4.

  In parallel with the excavation work, the liner plate 24 is assembled inside the skin plate 22 to cover the widened hole wall.

  The pilot drilling device 17 and the widening drilling device 18 described above are examples, and can be used in combination with other known drilling devices.

The present invention can obtain the following effects.
<A> Since both the force of the pushing force due to the frictional force between the blades of the screw auger and the negative pressure suction force acts on the conveyed object, the conveyed object can be efficiently transferred along the spiral space. .
<B> When the object to be conveyed is low-viscosity sandy soil, dredging, or the like, even if sufficient frictional force cannot be ensured by the screw auger, the negative pressure suction force can be efficiently transferred toward the discharge port.
<C> When the transported object is low-viscosity sandy soil or the like, even if a sufficient frictional force cannot be ensured with the screw auger, it can be efficiently transferred mainly using the negative pressure suction force.
<D> When the transported object is the above-mentioned mixed earth and sand, all kinds of things such as earthy sand mixed with straw, high water content earth and sand, powder and grains such as grains, and various slurries having viscosity It can be transferred efficiently. Moreover, since it can be applied not only to a vertical transfer application but also to a horizontal transfer application, it can be applied to any application.
<E> In the present invention, two types of forces having different properties of the pushing force by the friction force of the screw auger and the negative pressure suction force act on the spiral space in the auger casing. For this reason, since the transfer force that causes the meshing of the mass does not become insufficient, the separation of the object to be conveyed is difficult to occur. Accumulation of transported objects does not occur. Therefore, the incidence of blockage accidents in the auger casing is very low.
<F> When a scraping blade is provided on the intake side of the auger casing, the transported object can be forcibly collected toward the intake port of the auger casing by the scraping blade.
<G> When an outer casing is mounted around the auger casing and fluid such as air is ejected from the nozzles arranged between the peripheral surfaces of the two casings toward the auger casing, the fluid is ejected toward the auger casing. Since it can be transferred by force, it can be efficiently taken into the auger casing.
<H> It is possible to efficiently transport excavated soil by incorporating the transport device into a known excavator.

Explanatory drawing of the transfer principle of the transferred object Explanatory drawing of the conveying apparatus which concerns on Embodiment 2. III-III sectional view in FIG. Explanatory drawing of the conveying apparatus which concerns on Embodiment 3. VV sectional view in FIG. Explanatory drawing of Embodiment 4. FIG. FIG. 4 is a perspective view of the embodiment of FIG. 3. The perspective view of the Example of FIG .

DESCRIPTION OF SYMBOLS 1 Auger casing 2 Intake port 3 Outlet port 4 Screw auger 5 Shaft 6 Blade 7 Rotation drive source 8 Conveyance pipe 9 Motor 10 Vacuum pump 11 Conveyed object 12 Scraping blade 13 Annular plate 14 Intake port 15 Outer casing 16 Nozzle 17 Pilot drilling rig 18 Widening drilling rig

Claims (5)

In the method of transporting the object to be transported along the inner space of the casing,
A screw auger is housed in a casing in which intake and discharge ports are formed at both ends to form a spiral space inside the casing,
In addition, a rotary plate larger in diameter than the auger casing that rotates integrally with the shaft of the screw auger is provided on the intake side of the auger casing,
On the rotating plate, a scraping blade that rakes the object to be conveyed to the inlet is erected,
Connect the scraping blades with an annular plate ,
Both the pushing force caused by the frictional force between the blades of the screw auger and the negative pressure suction force acting over the entire length of the helical space in the auger casing are applied to the conveyed object,
A method for transporting an object to be transported, comprising transporting the object.
In the conveyance method of the to-be-conveyed object of Claim 1,
A transporting method for a transported object, wherein the transported object is earth and sand.
In the transport device for the transported object that is transported along the inner space of the casing,
A screw auger is rotatably accommodated in an auger casing formed with intake and discharge ports at both ends.
A negative pressure source is connected to the discharge port communicating with the spiral space in the casing,
In addition, a rotary plate larger in diameter than the auger casing that rotates integrally with the shaft of the screw auger is provided on the intake side of the auger casing,
On the rotating plate, a scraping blade that rakes the object to be conveyed to the inlet is erected,
Connect the scraping blades with an annular plate,
The structure is such that the pushing force caused by the frictional force between the blades of the screw auger and the negative pressure suction force generated over the entire length of the helical space in the auger casing are applied to the conveyed object. And
Conveyor device for transported objects.
In the conveyance apparatus of Claim 3,
The outer casing is packaged on the auger casing,
A nozzle that injects fluid toward the intake port of the auger casing is arranged between the peripheral surfaces of both casings,
Conveyor device for transported objects.
In the transport device for the transported object that is transported along the inner space of the casing,
The conveyance device according to any one of claims 3 to 4 is connected to a soil removal side of an excavator,
Conveyor device for transported objects.

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