JP2525283Y2 - Hydraulic excavator mud removal equipment - Google Patents

Description

[Detailed description of the invention] << Industrial application field >> This invention relates to a hydrophrase excavator which excavates the ground by rotating a cutter drum having a large number of excavating blades protruding on the outer periphery, and in particular, a cutter. The present invention relates to an improvement of a mud removing device for removing earth and sand adhering to a drum outer periphery.

<< Conventional Technology >> As a mud removing device of a hydrophrase type excavator, a frame is formed so that a brush body composed of comb-shaped linear members passes between respective excavating blades of a rotating cutter drum and slides on the outer periphery of the drum. And a structure that scrapes off the soil and mud adhering between the excavating blades with the rotation of the drum with the brush body (Japanese Utility Model Publication No. 60-22122) or a steel body instead of the brush body The one provided with a scraper is typical.

《Problems to be solved by the invention》 In a mud dropping device using a brush member of a linear member, when mud having a large adhesive force such as hard clayey soil adheres to the drum, the brush body is jumped up. As a result, there is a problem that the mud dropping effect is extremely reduced. Further, since the brush body is always in elastic contact with the outer periphery of the drum, the brush body is severely worn, and the brush body must be replaced frequently. There is also a problem that the brush body is greatly damaged when the cutter drum rotates in the reverse direction.

In the case of a mud remover using a steel scraper, an appropriate gap must be provided between the scraper and the excavating blade, so that mud adhering to the gap cannot be removed. Further, there is also a problem that clay, rocks, cobblestones, and the like are caught in the gaps and hinder smooth rotation of the cutter drum.

The present invention has been made in view of the above-mentioned conventional problems, and an object of the present invention is to provide a mud removing apparatus capable of efficiently removing silt, clay, mudstone, and the like adhering to the outer periphery of a cutter drum. .

<< Means for Solving the Problems >> Accordingly, in the present invention, in a hydrophrase excavator that excavates the ground by rotating a cutter drum having a large number of excavating blades protruding on the outer circumference, Nozzles for injecting high-pressure water, high-pressure water supply means for supplying high-pressure water to the nozzles, solenoid valves provided on the upstream side of the nozzles and provided corresponding to individual nozzles, Control means for selectively intermittently driving any one of the electromagnetic valves.

<< Operation >> The mud and the like adhering to the outer periphery of the cutter drum are washed down by the force of the high-pressure water jet injected from the nozzle.

<< Embodiment >> FIG. 1 and FIG. 2 show a schematic configuration of a hydrophrase type excavator provided with a mud remover according to an embodiment of the present invention. A pair of cutter drums 3 is pivotally supported by a drum support 2 protruding from a lower portion of the main body frame 1, and the drum 3 is rotated in the direction of an arrow by a hydraulic drive mechanism (not shown). A large number of excavating blades 4 are provided on the outer periphery of the drum 3 in an appropriate arrangement pattern. Although not shown, a mud pipe for sucking and discharging the excavated earth and sand is disposed in the main body frame 1 above the intermediate portion between the pair of cutter drums 3 and 3. The above configuration is a basic configuration of a general hydrophrase type excavator.

In the present embodiment, a mud removing device configured as follows is provided.

A plurality of nozzles N ₁ , N ₂ ,... Are linearly arranged at predetermined intervals in a portion of the main body frame 1 located directly above each drum 3. Specifically, eight nozzles N _{1 to} N ₈ are arranged at substantially equal intervals over the entire length of one drum 3.

Each nozzle N ₁ to N ₈ are connected to a common pipe 5 via a separate solenoid valve V ₁ ~V _8, this pipe 5 is connected to the tank 6. The tank 6 is provided with a pipe 7 for supplying water and an air compressor 8 for pressurizing the air in the upper part of the tank 6. The pipe 5,
The tank 6 and the pipe 7 constitute high-pressure water supply means.

After water is supplied from the pipe 7 to the tank 6, the air compressor 8 is operated to increase the pressure in the tank 6 to produce high-pressure water. When the appropriate opening and closing the solenoid valve V ₁ ~V ₈ by the control panel 9 (control means), and ejected from the nozzle Ni via solenoid valves Vi which high-pressure water in the tank 6 is opened, the water flow periphery of the cutter drum 3 Washed off by.

In this embodiment, V ₁ and V ₅ → V ₂ and V ₆ → V ₃ and V ₇ → V ₄
The electromagnetic valve 2 at a time intermittently opened driven in the order of V _8, is controlled so as to inject eight from two sequential pulses to high-pressure water out of the nozzle N ₁ to N _8. With such a configuration, even when the length of the drum 3 is large and the number of nozzles is large, a water stream with a sufficient pressure can be jetted onto the drum without increasing the capacity of the high-pressure water supply means. .

<< Effects of the Invention >> As described in detail above, the mud remover according to the present invention sprays high-pressure water to the outer periphery of the cutter drum to wash away the adhered soil, so that even a hard viscous soil having a large adhesive force can be efficiently removed. In addition to this, there is no mechanical wear unlike the conventional brush type, and there is no problem of sediment entrapment unlike the conventional scraper type.

[Brief description of the drawings]

FIG. 1 is a front view showing a schematic configuration of a hydrophrase type excavator equipped with a mud remover according to one embodiment of the present invention.
The figure is also a side view. DESCRIPTION OF SYMBOLS 1 ... Body frame, 2 ... Drum support 3 ... Cutter drum, 4 ... Drilling blade 5 ... Pipe (high pressure water supply means), 6 ... Tank (high pressure water supply means) 7 ... Pipe (high pressure) water supply means) 8 ...... air compressor 9 ...... control panel N ₁ to N ₈ ...... nozzle, V ₁ ~V ₈ ...... solenoid valve (control means)

Claims (1)

(57) [Scope of request for utility model registration] 1. A hydrophrase excavator for excavating a ground by rotating a cutter drum having a large number of excavating blades protruding on an outer periphery thereof, wherein a plurality of jets for injecting high-pressure water toward the outer periphery of the cutter drum are provided. Nozzle, a high-pressure water supply means for supplying high-pressure water to the nozzle, a solenoid valve provided upstream of the nozzle and provided for each nozzle, and selectively any one of all solenoid valves And a control means for intermittently opening the hydraulic excavator.