JP2000042502A - Washer for large machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a washer for large machine simplified in structure and also free from occurrence of a trouble. SOLUTION: A first jetting nozzle 12 for jetting a destructive washing water 23 and a second jetting nozzle 13 for jetting rinsing water are installed at the end part of a double pipe 3 where an inner pipe 1 is inserted into an outer pipe 2. And, the inner pipe 1 is provided with a pump 16 for forcibly feeding pressure water, and also a cylindrical flow passage 20 of the outer pipe 2 and the inner pipe 1 is connected to a water storage part 19 by a suction line 18 in which a pump is omitted. Furthermore, in a part of the suction line 18, a switching valve 21 for opening/closing the communication with the water storage part 19 is installed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cleaning device for a construction machine, and more particularly to a cleaning device for automatically and efficiently washing soil fixed on a complex undercarriage such as a crawler belt of a bulldozer. .

[0002]

2. Description of the Related Art At the time of washing construction machines, for example, mud or frozen soil hardened between crawler tracks requires washing by high-pressure injection (which may be referred to as "destructive washing" in the present invention). After the washing with water, there is adhesion of mud due to rebound and the like, and cleaning by low-pressure injection (rinse water injection) is required.

[0003]

In a conventional cleaning apparatus of this type, a high-pressure pump, a jet nozzle and a pipe for high-pressure injection and a large-capacity low-pressure pump, a jet nozzle and a pipe for low-pressure injection are connected. Since two systems were required, the structure became complicated. In particular, a large-capacity low-pressure pump was large and large in volume. Further, when water once used for washing is reused, there is a problem that the large-capacity low-pressure pump is liable to break down because dust and foreign matter are mixed therein. The present invention solves such a conventional problem and enables high-pressure injection and low-pressure injection to be switched with a simple piping system.
An object of the present invention is to make it possible to omit a large-capacity low-pressure pump, to simplify the structure, to make it compact, and to eliminate the occurrence of pump failure.

[0004]

SUMMARY OF THE INVENTION Accordingly, the present invention provides a composite nozzle in which a first jet nozzle for jetting destructive cleaning water and a second jet nozzle for jetting rinsing water are combined. The first jet nozzle is connected to the tip of the inner pipe, and the second jet nozzle is connected to the tip of the outer pipe. A pump for pumping pressurized water to the inner pipe is provided, and the cylindrical flow paths of the outer pipe and the inner pipe are connected to a water storage section by a suction pipe omitting a pump, and a part of the suction pipe is connected to the water storage section. A switching valve for opening and closing the communication is provided, and a part of the inside of the second ejection nozzle is set to a negative pressure by the negative pressure when the destruction cleaning water is ejected from the first ejection nozzle inside the composite nozzle. Water is sucked from the water reservoir through the outer pipe and rinsing water is jetted out Is constructed sea urchin.

[0005] Further, used water after washing of the construction machine to be washed is stored in a water storage section and reused. And, the switching valve simply opens and closes the suction pipe, or the switching valve opens and closes the suction pipe, and has an air port portion so as to suck air into the cylindrical flow path in the closed state. ing.

[0006] When the discharge flow rate of the destruction cleaning water from only the first ejection nozzle is V ₁ and the discharge flow rate of the rinsing water discharged from the second ejection nozzle is V ₂ , 2.0 × V ₁ ≦
It is configured so that V ₂ ≦ 7.0 × V ₁ .

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail based on the illustrated embodiments.

FIG. 1 is an overall front view, FIG. 2 is a plan view thereof, FIG. 3 is a cross-sectional view of an essential part, FIG. 4 is a destructive cleaning (high-pressure water injection) state, and FIG. Each state is shown.

This cleaning device is provided with two injection nozzles A, A (vertically parallel) projecting forward in a substantially horizontal shape.
Each injection nozzle A has a double pipe 3 in which the inner pipe 1 is inserted into the outer pipe 2.
And a front wall of a rectangular box-shaped casing 4 (FIGS. 1 and 2).
From the left side).

Each of the injection nozzles A has a base end pivotally attached to the casing 4 so as to be swingable about a substantially horizontal axis P, and a swinging piece 5 having a long hole at the base end is provided rearward. It is provided in a protruding manner. The upper and lower rocking pieces 5 and 5 are connected to the upper and lower ends of the interlocking rod 7 by bolts and nuts slidably in the respective long holes, and the nozzle swing motor 6 is mounted on the side wall of the casing 4. One end of a crank arm 8 is pivotally attached to a rotating disk that is rotated by a motor 6, and the other end of the crank arm 8 is slidably connected to the upper swinging piece 5. That is, the rotational motion of the motor 6 is converted into a oscillating motion, and the upper and lower injection nozzles A, A (as shown in FIG. 1) have an angle range α (for example, α = 24) of a virtual line.
°) can swing up and down.

Further, the cleaning apparatus of the present invention can be moved back and forth with respect to the object to be cleaned. That is, the casing 4
On the bottom wall, a moving motor 9 is provided, and four guide rollers 10 on the left and right sides are provided on the bottom wall so as to be rotatable about a vertical axis. Further, guide rails 11 are laid in the front-rear direction, and the groove portions of the guide rollers 10 are rotatably locked on the left and right edges of the guide rails 11, and the rotational torque of the motor 9 is applied to the rotation of the belts and pulleys. It is configured to be transmitted to the guide rollers 10 via a power transmission system and to reciprocate (forward / backward) on the guide rail 11.

In the cleaning apparatus of the present invention, the composite nozzle in which the first jet nozzle 12 for jetting the destructive cleaning water 23 and the second jet nozzle 13 for jetting the rinsing water 25 are connected to the double pipe 3 To form a spray nozzle A. That is, the first ejection nozzle 12 is connected to the tip of the inner pipe 1 of each ejection nozzle A, and the second ejection nozzle 13 is connected to the tip of the outer pipe 2.

In each of the injection nozzles A, a high-pressure hose 14 is connected to the base end opening of the inner pipe 1 of the double pipe 3, and
A low-pressure hose 15 is connected to an opening on the outer peripheral surface of the proximal end of the outer pipe 2, and a pump 16 for pumping pressurized water to the inner pipe 1 is provided. The two high-pressure hoses 14, 14 connected to each injection nozzle A are connected to a pressure water supply pipe 17 for supplying pressure water from the pump 16 under pressure, and the two low-pressure hoses 15, 15 ( And a cylindrical flow path 20) formed by the outer pipe 2 and the inner pipe 1 is formed by a suction pipe 18 omitting a pump.
Connected to 19.

A part of the suction pipe 18 has a water storage section.
A switching valve 21 for opening and closing the communication with 19 is interposed. The switching valve 21 is configured to simply open and close the suction pipe 18.

Next, the cleaning operation and operation of the cleaning apparatus of the present invention will be described. As shown in FIGS. 4 and 6, first, an object to be cleaned such as the construction machine 22 is moved to a position in front of the cleaning device, and the casing 4 is moved to a predetermined position along the guide rail 11. Then, the switching valve 21 provided in a part of the suction pipe 18 is closed to drive the pump 16 so that only the destruction cleaning water 23 (high-pressure water) is supplied from the first ejection nozzles 12 of the upper and lower ejection nozzles A, A. To perform destructive cleaning.

At this time, the destructive cleaning water 23 is 40 kg / cm ² -15
The pressure is set to 0 kg / cm ² , and the diffusion range β ₁ is set to be ejected linearly from 0 ° to 3 °. Further, the discharge flow rate V ₁ of the fracture washing water 23 is set to, for example, 35L / min.

The construction machine 22, such as a bulldozer or a power shovel, can be easily washed and removed when mud or frozen soil is fixed on the undercarriage portion 24 (particularly between teeth called grousers of the crawler belt). become unable. However, as described above, the destruction cleaning water 23 is supplied from the first ejection nozzle 12 to the construction machine 22.
By injecting straight into the underbody portion 24, these stuck dirt can be blown off and removed. At this time, the upper and lower injection nozzles A and A are swung up and down, and the construction machine 22 itself is moved forward and backward (moves in the left and right direction with respect to the injection nozzle A) to destroy the destruction cleaning water.
Wash while applying 23 properly to the soiled area. Further, the casing 4 is moved back and forth to adjust the strength of the destructive cleaning water 23 hitting the underbody portion 24.

If the pressure of the destructive cleaning water 23 is smaller than 40 kg / cm ² , the cleaning effect by water pressure is reduced, and if the pressure is larger than 150 kg / cm ² , the whole apparatus is large in order to withstand high pressure. It will be.

When the adhered dirt on the undercarriage portion 24 and the like is removed by destructive cleaning, rinsing cleaning is performed to wash and finish splashed muddy water, earth and sand, and the like. That is, as shown in FIG. 5, the switching valve 21 is switched and opened, and each of the injection nozzles A, A communicates with the water reservoir 19. Then, in the composite nozzle, a part of the inside of the second ejection nozzle 13 becomes negative pressure due to the negative pressure when the destruction cleaning water 23 is ejected from the internal first ejection nozzle 12,
Thereby, the water sucked into the suction pipe 18 from the water storage section 19 is jetted from the second jet nozzle 13 as the rinsing water 25 through the cylindrical flow path 20 of the outer pipe 2 and the inner pipe 1 (that is, the so-called spray negative). By the pressure suction phenomenon or the principle of Venturi,
Rinse water 25 spouts).

At this time, the rinsing water 25 is jetted in a predetermined diffusion range θ so as to surround the destruction cleaning water 23. Specifically, the diffusion range is set to 10 ° ≦ θ ≦ 40 °, preferably
The diffusion range is set to 20 ° ≦ θ ≦ 30 °. If the diffusion range θ is less than 10 °, local rinsing and washing take time, and if the diffusion range θ is larger than 40 °, rinsing and cleaning of a specific portion becomes difficult.

When the discharge flow rate of the destructive cleaning water 23 from only the first jet nozzle 12 is V ₁ and the discharge flow rate of the rinsing water 25 discharged from the second jet nozzle 13 is V ₂ , 2.0 ×
It is configured such that V ₁ ≦ V ₂ ≦ 7.0 × V ₁ .
(Note that the discharge flow rate V ₂ of the rinsing water 25, at a negative pressure suction write phenomenon spray mentioned above, the flow rate sucked from the cylindrical channel 20, the sum of the flow rate V _1.) For example, destruction If the discharge flow rate V ₁ of the cleaning water 23 was set to 35L / min, rinse water
Discharge flow rate V ₂ of the 25 are configured to be 150L / min before and after. That is, the discharge flow rate V ₁ of the destructive cleaning water 23 and the rinsing water 25
The discharge flow rate V ₂ With such a relationship, it is possible to quickly and cleanly rinsing. If the discharge flow rate V ₂ of the rinsing water 25 is smaller than 2.0 × V ₁ , it takes time for rinsing and cleaning. Also, the discharge flow rate V _{2 is set} to 7.0
Making it larger than × V ₁ wastes water.

Although not shown, in the present invention, the used water after washing of the construction machine 22 to be washed is stored in the water storage section 19 and reused. For example, a water storage section 19 is provided under the washing basin, the used water flows down from the washing basin to the water storage section 19, and the supernatant of the water storage section 19 is used again.

FIG. 7 shows another embodiment of the apparatus for cleaning a large-sized machine according to the present invention. That is, the switching valve 21 opens and closes the suction pipe 18 and has an air port 26 so as to suck air into the cylindrical flow passages 20 of the outer pipe 2 and the inner pipe 1 in the closed state. That is, by closing the water storage section 19 and the suction pipe 18 and communicating the suction pipe 18 with the external space, air is blown out from the cylindrical flow path 20 at the time of destructive cleaning, whereby the second discharge nozzle Destruction cleaning water from 13 to 23
Is able to inject more vigorously.

FIG. 8 shows another embodiment. In this embodiment, a throttle portion 27 is provided at the tip of the second ejection nozzle 13 so that the destruction cleaning water 23 is supplied at 3 ° ≦ β ₂ ≦ 10 °. And spread slightly from the second jetting nozzle 13 in the fan-shaped range in the diffusion range. As a result, the rinsing water spreads a little and the second
It can be ejected from the ejection nozzle 13.

The present invention is not limited to the above-described embodiment. For example, the upper and lower injection nozzles A, A may be configured to swing up and down independently. Also guide rollers
Are arranged at the four apexes of the square, so that they can travel left and right along the guide rails 11 laid in the left-right direction.

[0026]

Since the present invention is configured as described above, the following effects can be obtained.

According to the first aspect of the present invention, a structure in which high-pressure injection and low-pressure injection are switched by a simple piping system can be provided. In addition, since a large-capacity low-pressure pump can be omitted, the structure can be simplified and the size can be reduced, and the occurrence of pump failure can be eliminated.

According to the second aspect, a great saving of water resources can be achieved. According to the third aspect of the present invention, the structure of the switching valve 21 is simple, and clogging of dust, foreign matter, and the like hardly occurs.

In the destructive cleaning (according to claim 4),
The destruction cleaning water 23 can be ejected from the second ejection nozzle 13 even more vigorously. (According to claim 5), rinsing and washing can be performed quickly and cleanly without wasting water.

[Brief description of the drawings]

FIG. 1 is a sectional front view showing an embodiment of the present invention.

FIG. 2 is a sectional plan view.

FIG. 3 is a sectional view of a main part showing an injection nozzle.

FIG. 4 is an explanatory diagram showing a destructive cleaning state.

FIG. 5 is an explanatory diagram showing a rinsing cleaning state.

FIG. 6 is a simplified plan view showing a cleaning state.

FIG. 7 is an explanatory diagram of a switching valve showing another embodiment.

FIG. 8 is a cross-sectional view of a main part of an injection nozzle showing another embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Inner pipe 2 Outer pipe 3 Double pipe 12 1st ejection nozzle 13 2nd ejection nozzle 16 Pump 18 Suction pipe 19 Water storage section 20 Cylindrical flow path 21 Switching valve 22 Construction machinery 23 Destruction washing water 25 Rinse water 26 Airport section

Claims (5)

[Claims] 1. A first jet nozzle for jetting destructive cleaning water 23.
12 and a second jet nozzle 13 for jetting the rinsing water 25 are combined with each other to form a double nozzle 3 in which the inner pipe 1 is inserted into the outer pipe 2.
And a first ejection nozzle 12 is connected to a tip of the inner tube 1, and a second ejection nozzle 13 is connected to a tip of the outer tube 2. 1 is provided with a pump 16 for pumping pressurized water, and
And the cylindrical flow path 20 of the inner pipe 1 is a suction pipe 18 omitting a pump.
Connected to the water storage section 19, a switching valve 21 for opening and closing communication with the water storage section 19 is provided in a part of the suction pipe 18, and
In the composite nozzle, a part of the inside of the second jet nozzle 13 is made negative pressure by the negative pressure when the destruction cleaning water 23 is jetted from the internal first jet nozzle 12 through the outer pipe 2 and the water storage section. A washing device for a large-sized machine, wherein the washing device is configured to suck water from 19 and eject rinsing water 25. 2. The cleaning apparatus for a large-sized machine according to claim 1, wherein the used water after washing of the construction machine to be washed is stored in the water storage section and reused. 3. The cleaning apparatus for a large machine according to claim 1, wherein the switching valve simply opens and closes the suction pipe. 4. The large-sized device according to claim 1, wherein the switching valve opens and closes the suction pipe and has an air port section so as to suck air into the cylindrical flow path in the closed state. Machine cleaning equipment. 5. Destruction cleaning water from only the first jet nozzle 12
The discharge flow rate of 23 and V _1, if the discharge flow rate of the rinse water 25 discharged from the second jetting nozzle 13 was set to V _2, 2.0 × V ₁
≦ V ₂ ≦ 7.0 × claim 1 configured such that V _1,
The cleaning device for a large machine according to 2, 3, or 4.