JPH0634047U - Adhesive soil removal device for drum cutters - Google Patents

Abstract

(57) [Summary] [Purpose] To provide an apparatus capable of surely removing cohesive soil adhering to a drum cutter. [Structure] Two diagonally downward nozzles 4 are arranged inside each scraper 3 provided above the drum cutter 1. These nozzles 4 are connected to the tip of the pipe 5,
This pipe 5 is connected to a pipe 7a branched from a pipe 7 connected to a pressure pump (not shown). A container containing a stabilizing solution is connected to the pressure pump.
Therefore, if the pressurizing pump is operated during rotation of the drum 12, the stabilizing liquid is jetted from the nozzle 4 toward the drum cutter 1, and each bit string 1 that cannot be removed by the scraper 3 is ejected.
The soil adhering to the space B between the bits 11 forming 1a can be separated and removed by the sprayed stabilizing solution.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention is an excavator used when excavating a hole for a continuous underground wall or other foundations. The excavator is equipped with a drum cutter (a large number of bits are arranged on the peripheral surface of the drum). The present invention relates to a device for removing adhered soil.

[0002]

[Prior art]

 When excavating soft cohesive soil using an excavator equipped with a drum cutter when forming a continuous underground wall or a hole for foundation, the cohesive soil adheres to the bit and the peripheral surface of the drum. It has been a problem from the past. Therefore, as shown in FIGS. 5 and 6, when there is a gap of a predetermined width or more between the bit strings 11a arranged along the circumferential direction of the drum 12, the scraping of the width corresponding to the gap is performed. The picking device (scraper) 3 was attached above the drum cutter 1 to remove the cohesive soil adhering to the space A between the bit rows.

[0003]

[Problems to be solved by the device]

 However, in the above-described method, the action of the scraper 3 does not act on the space B between the bits 11 forming each bit string 11a, so that the cohesive soil adhering to that portion was not removed. Further, as shown in FIG. 7, when the bits 11 are densely arranged so that a gap having a predetermined width or more cannot be secured between the bit strings 11 b, the bit 11 c hits the scraper 3 when the drum 12 rotates. Therefore, the scraper 3 cannot be attached. Therefore, the excavation efficiency was immediately reduced due to the cohesive soil adhering to the drum cutter 1, and it was necessary to frequently lift the excavator during excavation work to remove the adhering soil.

The present invention is intended to solve such a problem, and an object of the present invention is to provide an apparatus capable of more reliably removing the cohesive soil attached to the drum cutter than in the past.

[0005]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention is a device for removing soil adhering to a drum cutter in which a large number of bits are arranged on the peripheral surface of a drum, and a nozzle for ejecting a liquid toward the drum cutter. An apparatus for removing adhering soil from a drum cutter is provided.

[0006]

[Action]

 In the device of the present invention, since the nozzle for ejecting the liquid toward the drum cutter is provided above the drum cutter, when the liquid is ejected from the nozzle, the ejected liquid collides with the drum cutter and flows on the surface thereof. By this liquid flow, the soil adhered to the drum peripheral surface and the bit can be separated.

[0007]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. 1 is a schematic view showing a first embodiment of the present invention, FIG. 2 is a side view of FIG. 1, FIG. 3 is a schematic view showing a second embodiment of the present invention, and FIG. FIG. Here, a drum cutter provided in the horizontal multi-axis excavator will be described as an example.

As shown in FIG. 1, in a recent horizontal multi-axis excavator, a pair of drum cutters 1 in which bits 11 are opposed to each other are arranged in two pairs in parallel with a suction port 2 connected to an earth discharging pipe interposed therebetween. It is located in. In the first embodiment, as can be seen from FIGS. 1 and 2, each of the drum cutters 1 has a scraper 3 having a width corresponding to the interval between the bit rows 11a at four positions along the axial direction of the drum 12. The nozzles 4 for liquid injection according to the present invention are installed inside each scraper 3.

Two nozzles 4 are connected to the tip of a pipe 5 arranged in each scraper 3, and the tip of each nozzle 4 is directed obliquely downward from the pipe 5 toward both sides of the scraper 3. . Each nozzle 4 is connected to the pipe 5 at an inclination so that the liquid ejected from the nozzle 4 at a predetermined pressure surely hits the drum cutter 1 (as indicated by an arrow). The pipe 5 is continuous with the tip of a pipe 7a arranged inside the member 6 to which the scraper 3 is attached, and the pipe 7a is branched from the pipe 7 connected to a pressure pump (not shown). It is a thing.

As the liquid to be ejected from the nozzle 4, for example, a stabilizing liquid used for excavation is used, and the above-mentioned pressurizing pump is connected to the container containing the stabilizing liquid, and the stabilizing liquid pressurized by the operation of the pump is used. Are ejected from the nozzle 4. Therefore, if the pressurizing pump is operated while the drum 12 is rotating, the stabilizing liquid is sprayed from the nozzle 4 toward the drum cutter 1, and the space between the bits 11 forming the bit rows 11a that cannot be removed by the scraper 3 is passed between the bits 11. The adhered soil can be removed by peeling it off with the sprayed stabilizer.

The second embodiment is an example of a case in which the scrapers cannot be attached because the bits 11 are densely arranged so that a gap having a predetermined width or more cannot be secured between the bit strings 11b. As can be seen, the enclosure member 8 for disposing the nozzle 4 was attached to the bracket (not shown) to which the scraper 3 was attached in the first embodiment.

Here, three nozzles 4 are connected to the tip of a pipe 5 arranged inside the enclosing member 8, and two of the nozzles 4 are obliquely directed downward to enclose the tip thereof in the same manner as described above. It is directed to both sides of, and the other is directed vertically downward. Each of the nozzles 4 directed obliquely downward is connected to the pipe 5 at an inclination so that the liquid jetted from the nozzle 4 at a predetermined pressure surely hits the drum cutter 1 (as indicated by an arrow).

The pipe 5 is continuous with the tip of a pipe 7a arranged inside the member 6 to which the enclosure member 8 is attached. This pipe 7a is connected to a pressurizing pump (not shown). It is a branch. Further, similarly to the above, the container containing the stabilizing solution is connected to the pressurizing pump so that the stabilizing solution pressurized by the operation of the pump is ejected from the nozzle 4.

In this example, the distance from the tip of the nozzle 4 to the drum 12 is set longer than that of the first embodiment so that the bit 11 does not come into contact with the nozzle 4. It is necessary to apply a pressure higher than in the first embodiment so that the liquid surely hits the drum cutter 1. When the pressurizing pump is operated while the drum 12 is rotating, the stabilizing liquid is jetted from the nozzle 4 toward the drum cutter 1 (as indicated by the arrow), and the stabilizing liquid from the three nozzles 4 is discharged. The soil that has adhered to the entire cutter 1 can be peeled off and removed.

The position of the drum cutter 1 to which the liquid ejected from the nozzle 4 hits does not hinder the flow of the crushed soil to the suction port 2 regardless of the presence or absence of the scraper, and the removed soil can be quickly removed. To a position where it can be moved to the suction port 2.

[0016]

[Effect of device]

 As described above, when the scraper is provided above the drum cutter, if the adhering soil removing device of the present invention is provided together, by applying the liquid ejected from the nozzle to the part that cannot be removed by the scraper, The sprayed liquid can peel off and remove the adhered soil on the portion.

When the scraper cannot be installed above the drum cutter, the nozzle is arranged so that the jetted liquid from the nozzle hits the entire drum cutter. The soil can be removed with a jetting liquid. As a result, it is possible to more reliably remove the cohesive soil attached to the drum cutter than in the past, and thus the work efficiency of excavation is improved.

[Brief description of drawings]

FIG. 1 is a schematic view showing a first embodiment of the present invention.

FIG. 2 is a side view of FIG.

FIG. 3 is a schematic view showing a second embodiment of the present invention.

FIG. 4 is a side view of FIG.

FIG. 5 is a schematic diagram for explaining a conventional example.

FIG. 6 is a side view of FIG.

FIG. 7 is a schematic diagram for explaining a conventional example.

[Explanation of symbols]

 1 drum cutter 11 bits 12 drums 4 nozzles

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Motoshige Ariyama 1-25-1 Nishishinjuku, Shinjuku-ku, Tokyo Taisei Corporation

Claims (1)

[Scope of utility model registration request] 1. A device for removing soil adhering to a drum cutter, in which a large number of bits are arranged on a peripheral surface of a drum, wherein a nozzle for ejecting a liquid toward the drum cutter is provided. Adhesive soil removal device for drum cutters.