JPH11303422A - Working machine with water-jetting nozzle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a working machine with a water-jetting nozzle which can replenish water into a water tank even if a large-sized crane or an exclusive watertank vehicle is not used and which is excellent in a working efficiency. SOLUTION: A fitting device 14 for a water tank, provided with a tank sideface guide 14a and a tank bottom guide 14b is mounted on the upper revolving body 3 of a working machine having a water-jetting nozzle to constitute the water tank so that it can be installed at a specified position by only lowering the water tank 15. A water pouring outlet communication device is provided to connect the water-pouring outlet of the water tank 15 to the water intake of a water pump which can feed high pressure water to true water-jetting nozzle by only fitting the water tank 15 to the fitting device 14 and disconnect the communication by only detaching the water tank. In this way, since only the water tank may be transferred when replenishing water, it is not required to use a large-sized crane such as an unloader or the like to hoist the entire machine body, in works in a boat or an exclusive water tank, and hence, the replenishing time of water to the water tank 15 is shortened.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water jet for crushing an object to be processed or removing an adhering substance on a wall or the like by freely traveling around a work site while preventing generation of dust. It belongs to the technical field of working machines with nozzles.

[0002]

2. Description of the Related Art As is well known, a large amount of dust is generated when a concrete structure such as a building is dismantled or when a large crushed concrete block is crushed into small blocks.
Not only is the working environment deteriorated, but also it is not possible to avoid the scattering of dust to the surroundings, which is environmentally unfavorable to nearby residents.
Therefore, a working machine with a water injection nozzle is used to dismantle and crush concrete structures while spraying water. Also, for example, when loading coal or the like loaded on a ship, a strong coal adhesion layer is formed on the hold wall of the hold, but such a coal adhesion layer also prevents the generation of dust, The parts that cannot be scraped off with a spatula, such as the pipes and the ramp and the dragon bone, are washed and removed by water jetting.

First, when dismantling a concrete structure,
A working machine with a water injection nozzle according to Conventional Example 1 for crushing a large crushed large block of concrete into small blocks will be described with reference to FIG. A water supply hose 58 is disposed on the upper revolving unit 52 and the working arm 53, and the upper end of the water supply hose 58 dismantles a concrete structure or crushes a large crushed concrete block into small blocks. It is connected to a water injection nozzle (not shown) provided on a work attachment 54 having crushable teeth that can be opened and closed. Further, water in a stationary water tank 55 disposed at the work site is supplied by a stationary pump 56 also disposed at the work site from the water pump 56 to a water supply base communicating with a base end of a water supply hose 58. It is configured to be fed through a hose 57.

Therefore, according to the working machine 51 with the water injection nozzle according to the conventional example 1, while the water is being injected from the water injection nozzle, the concrete structure is dismantled by the work attachment 54 or the crushed large lump is used. When crushing concrete lumps into small lumps, generation of dust can be prevented.

Next, a working machine with a water injection nozzle according to a second conventional example for removing a coal-adhering layer adhering to a hold wall of a hold will be described with reference to FIG. A water supply hose 68 is disposed on the upper revolving unit 62 and the work arm 63 of the work machine 61 with a water injection nozzle that moves on the floor surface of the hold H of S, and the upper end of the water supply hose 68 is attached to the tip of the work arm 63. The distal end of the telescopic cylinder 64 is connected to a water jet nozzle 69. And this water supply hose 6
A water supply base hose 67 wound around a hose reel 66 from a water pumping device 65 composed of a stationary water tank pump disposed on the deck of the ship S is connected to the base end of the vessel 8.

Therefore, according to the work machine 61 with the water injection nozzle according to the prior art 2, the high pressure water is injected from the water injection nozzle 69 to prevent the generation of dust, and the hold H The coal deposits can be removed from the warehouse walls.

Next, a working machine with a water injection nozzle according to Conventional Example 3 will be described with reference to FIG. At the tip of the arm 73, a spatula 74 for scraping off the attached matter is attached as a work attachment. A water tank 75 serving as a supply source of water supplied to a water injection nozzle 79 attached to a spatula 74 via a water supply hose (not shown) is mounted on the upper rotating body 72. Therefore, according to the working machine 71 with a water injection nozzle, it is possible to spray off high-pressure water from the water injection nozzle 79 to prevent scattering of dust and to remove the attached matter by scraping with the spatula 74. When dismantling a concrete structure as described above, a working machine with a water injection nozzle for crushing a large crushed concrete block into small blocks,
It is also known that a water tank is mounted on an upper rotating body of a working machine with a water injection nozzle for removing a coal deposit from a hold wall of a hold.

[0008]

The working machines with water jet nozzles according to the prior art examples 1, 2 and 3 are all useful as such, but each has the following problems to be solved. I have. First, in the working machine with the water injection nozzle according to the conventional example 1, since the hose is connected to the tail portion of the working machine with the water injection nozzle, the working range is largely limited, and the hose is turned while securing a sufficient margin for the hose. -If you do not run, it is difficult for the driver and the hose maintenance assistant.
That is, the hose must not be crushed by the track shoe. In addition, since the demolition site is usually narrow and piled with debris, it is necessary to provide a water tank for replenishing water outside the working range of the work machine with the water injection nozzle. There is a problem to be solved in that it needs to be attached and requires the cost of water supply equipment. Further, at a work site where a water supply facility cannot be provided, it is necessary to use a vehicle dedicated to water tanks for transporting water, which raises a problem to be solved in that the cost of transporting water increases.

Next, in the working machine with a water injection nozzle according to Conventional Example 2, as described above, a water pump unit with a water tank (with a motor) is installed on the deck of a ship. Therefore, when the water tank is empty, the hose is cut off from the working machine with the water injection nozzle and wound up, and then the water pump unit with the water tank is lifted by a crane and moved to a water supply location,
After the water is supplied, the operation of installing the water supply nozzle at a predetermined position, drawing out the hose, and connecting the hose to a working machine with a water injection nozzle is repeated, so that there is a problem that the water supply cost increases. Also,
Since the working machine with the water injection nozzle has to move in a wide hold, the hose is long. Therefore, every time the robot moves or turns, there is also an operator on the side of the water pump unit with a water tank, which controls the winding and unwinding of the hose while using a nerve in cooperation with the operator of the work machine with the water injection nozzle. In addition, not only the working range of the working machine with the water injection nozzle is restricted, the working efficiency is reduced, but also a long hose may interfere with an obstacle and break.

In the working machine with a water injection nozzle according to the conventional example 3, when, for example, the operation of removing the coal deposit on the hold wall is performed, both the main body of the working machine with the water injection nozzle and the full water tank are used. It is necessary to use a crane or the like to hang a work machine with a water injection nozzle equipped with a water tank full of water from outside the ship and carry it into the hold. In other words, when the water tank is emptied due to the continuation of the work, as shown in FIG. 8, it is necessary to repeat the work of suspending the water tank by the dedicated hanging device 90 and supplying water outside the boat, so it is necessary to prepare a large crane. In addition, due to the weight difference between the empty water tank and the full water tank, it is necessary to increase the weight of the work machine with water injection nozzles in order to consider stability during round suspension. There was a problem to be solved in that the tank had to be reduced in capacity.

Accordingly, an object of the present invention is to supply water to a water tank without using a large crane or a vehicle for exclusive use of a water tank, and to dismantle concrete structures or crush large lumps. It is an object of the present invention to provide a working machine with a water injection nozzle which is excellent in the efficiency of the crushing process for converting the concrete mass into small lumps and the efficiency of the operation for removing the coal adhesion layer.

[0012]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and the means employed by the working machine with a water injection nozzle according to the first aspect of the present invention is a method for moving a vehicle downward. A body, an upper revolving body mounted on the lower traveling body and revolving around a vertical axis as a center of revolving, a work arm that is supported by the upper revolving body so as to be able to undulate and bends freely, A work attachment for crushing or removing the object to be treated is attached at the tip, a water injection nozzle for injecting water toward the object to be treated is provided, and a water supply line for supplying the water to the water injection nozzle. In the working machine with a water injection nozzle provided with, a detachable water tank that supplies jet water to the water injection nozzle via the water supply pipe is mounted on the upper rotating body. I do.

According to a second aspect of the present invention, there is provided a working machine with a water injection nozzle according to the first aspect of the present invention, wherein the water tank is mounted on the upper rotating body in the working machine with the water injection nozzle according to the first aspect. A water tank mounting device having a tank position adjusting function for automatically adjusting the position is provided.

According to a third aspect of the present invention, there is provided a working machine with a water injection nozzle according to any one of the first and second aspects, wherein A cushion member is provided on one of a body and a lower surface of the water tank.

According to a fourth aspect of the present invention, there is provided a working machine with a water injection nozzle according to any one of the first, second, and third aspects. A water outlet communication mechanism for automatically connecting a water outlet provided at a lower portion of the water tank to the water supply pipe when the water tank is mounted on the water tank mounting device on the upper rotating body; Is provided.

According to a fifth aspect of the present invention, there is provided a working machine with a water injection nozzle according to any one of the first, second, third and fourth aspects. A water pump for pumping water in the water tank to a water injection nozzle via a water supply pipe is provided in one of the upper revolving unit and the water tank.

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION A working machine with a water injection nozzle according to an embodiment of the present invention will be described below. A water injection system for dismantling concrete structures and crushing large crushed concrete blocks into small blocks. As an example of a working machine with a nozzle, FIG. 1 is an overall side view thereof, FIG. 2 is a side sectional view thereof showing a working arm and a work attachment omitted, and a partially cutaway A in FIG.
This will be described with reference to FIG. 3 as viewed in the direction of an arrow, FIG. 4 as an explanatory view of the configuration of the bottom guide portion of the water tank, and FIG. 5 as an explanatory view of the configuration of the water outlet communication mechanism of the water tank.

First, the configuration of a working machine with a water injection nozzle according to an embodiment of the present invention will be described with reference to FIGS. 1 to 5. Reference numeral 1 shown in the drawing denotes a working machine with a water injection nozzle. The work machine 1 with a water jet nozzle includes a lower traveling body 2 of a crawler traveling type and an upper revolving body 3 mounted on the lower traveling body 2 and revolving around a vertical axis.
And a work arm 4 described later, which is flexibly supported by the upper swing body 3 and is bendable.

The working arm 4 has an upper revolving unit 3 on the bottom side.
A boom 4a raised and lowered by a boom raising and lowering cylinder 6 pivotally mounted on the boom 4a, and an intermediate arm cylinder 7 which is pin-connected to the tip of the boom 4a and whose bottom side is pivotally mounted on a bracket provided on the abdomen of the boom 4a. The intermediate arm 4b includes a pivotable intermediate arm 4b, and a distal end arm 4c that is connected to a distal end of the intermediate arm 4b by a pin and that is pivoted by a distal arm cylinder 8 whose bottom side is pivotally attached to the bracket of the intermediate arm 4b. ing. In addition, this working arm 4
Has two joints, as is well understood from the above description. However, the number of the joints may be one or three, so that the configuration of the working arm itself However, the present invention is not limited to this.

At the tip of the working arm 4, that is, at the tip of the tip arm 4c, the bottom side is the tip arm 4c.
A work attachment 5 called a nibble having a pair of openable and closable crushing teeth 5a and 5b is connected to a pin by an attachment operation cylinder 9 pivotally attached to a bracket provided on the back of the work attachment. The work attachment 5 incorporates a slewing device equipped with a slewing bearing, so that the crushing teeth 5a, 5b can be used regardless of whether the concrete structure to be crushed is vertical, horizontal, or inclined. It is configured to be able to crush by squeezing by changing the direction by rotation of.

Further, a water jet nozzle 10 for jetting high-pressure water toward a crushed portion of the concrete structure to be crushed by the work attachment 5 is provided at the abdomen of the tip arm 4c of the working arm 4. The water injection nozzle 10 is disposed along the working arm 4 and has a tube 11a.
And a hose 11b are connected alternately and continuously to an upper end of a water supply line 11, and a lower end of the water supply line 11 is disposed inside the upper revolving unit 3, and a hydraulic motor Is connected to the discharge port of the water pump 12 driven by. The upper end of the water suction port 12a of the water pump 12 projects below a water tank 15 removably mounted on a water tank mounting device 14 provided on the upper swing body 3 and described later. Is connected to a water outlet communication mechanism 13 to be described later with which the lower horizontal surface 16a of the water outlet 16 provided with the water outlet 16 contacts.

The water tank mounting device 14 includes a tank side guide 14a, which is inclined along the rear surface of the cab 3a of the upper swing body 3, and a predetermined widthwise direction on the upper swing body 3. A pair of conical tank bottom guides 14b projecting at intervals, and an inclined cushion member 14c provided on the tank side guide 14a on the opposite side of the cab 3a; And a sheet-like horizontal cushion member 14d attached thereto. By the way, as a material of the cushion material, for example, a synthetic resin, a spring, or the like can be used.

On the lower surface of the water tank 15 mounted on the water tank mounting device 14, an engagement member 15a having an inverted mortar-shaped recess into which the pair of triangular pyramid-shaped tank bottom guides 14b is fitted. Is protruding.

Therefore, when the water tank 15 is mounted on the water tank mounting device 14, a wire rope connected to a suspension ring 15c protruding above the water tank 15 is hung via a hook of a crane (not shown). When the reversely inclined side surface 15b of the water tank 15 comes into contact with the tank side guide 14a due to the descent, the water tank 1
5 is guided by the tank side guide 14a and descends while sliding diagonally. When the lower portion of the water tank 15 comes into contact with the horizontal cushion member 14d, the engagement member 15
Since a pair of conical tank bottom guides 14b fit into the inverted mortar-shaped recesses a, the water tank 15 is automatically mounted at a predetermined position on the upper rotating body 3.

Of course, the water tank 15 does not come off or rattle from the water tank mounting device 14 due to vibration or impact during movement or operation of the working machine 1 with the water jet nozzle, for example, The container is fixed to the water tank mounting device 14 by a tank fixing device (not shown) provided on a truck of a freight train or a carrier of a container transport truck, and the fixing is released by a simple operation. Have been.

The water outlet communication mechanism 13 includes an elastic holding member 13a made of a cylindrical elastic resin fixed on the upper swing body 3 by fixing the flange portion with mechanical fixing means such as a bolt. A water outlet valve which is fitted from the upper opening side of the elastic holding member 13a, and a nipple 13e communicating with the water suction port 12a of the water pump 12 is screwed to a lower part thereof, and projects upward from the upper opening. And a washer 13b. This water outlet valve seat fitting 1
A seal ring groove 13c formed by fitting a seal ring 13d on the upper surface is formed in the upper part of 3b. As the seal ring 13d, for example, a known O-ring is used.

That is, when the water tank 15 is mounted on the water tank mounting device 14, the lower end horizontal surface 16 of the water outlet 16 of the water tank 15 is generated by the elastic force of the elastic holding member 13a.
The configuration is such that the upper surface of the disc portion of the water outlet valve seat fitting 13b is automatically pressed against a. Accordingly, the lower horizontal surface 16a of the water outlet 16 of the water tank 15 crushes the seal ring 13d and comes into close contact with the upper surface of the disc portion of the water outlet valve seat 13b.
Even if water flows out of the water pump 12 and flows into the water suction port 12a of the water pump 12, water does not leak from between the lower horizontal surface 16a and the upper surface of the disk portion. The elastic holding member 1
3a can be replaced, for example, by a compression coil spring.

In the embodiment of the present invention, the water pump 12 and the water tank 15 are separated as described above, but the water pump 12 is integrated into the water tank 15. It can also be configured. However, if the water tank 15 is detached or attached from the water tank attaching device 14 when the water pump 15 is integrated, the water pump 1
It is necessary to connect and disconnect the hydraulic piping that supplies hydraulic oil to the hydraulic motor that drives the hydraulic motor 2.
In order to facilitate the removal operation, a detachable and well-known quick coupler is employed.

The working mode of the working machine 1 with the water injection nozzle having the above configuration will be described below. When crushing a structure, the on-off valve 17 is first opened and the water pump 12 is driven. Then, high-pressure water is pumped to the water supply pipe 11,
Since high-pressure water is injected from the water injection nozzle 10, the generation of dust is prevented while preventing the generation of dust by the overall operation of the swing operation of the upper swing body 3, the bending operation of the work arm 4, and the swing opening and closing operation of the work attachment 5. Can be dismantled and crushed.

When the water in the water tank 15 is exhausted due to the continuation of the operation while injecting the high-pressure water from the water injection nozzle 10, it becomes necessary to replenish the water. After stopping, the on-off valve 17 interposed in the water outlet 16 is closed, and the fixing of the water tank 15 is released by operating the tank fixing device. Then, the water tank 15 attached to the water tank attachment device 14 is lifted using a crane, and is transported to a water source position, for example, by placing it on a normal truck bed, returning to the work site after refilling water, and again using the crane. When the water tank 15 is lifted and placed on the water tank mounting device 14 and fixed by the operation of the tank fixing device, the water outlet 16 is connected to the water inlet 12 a of the water pump 12 through the water outlet communication mechanism 13.
Therefore, simply opening the on-off valve 17 interposed in the water outlet 16 restores the state where high-pressure water can be injected from the water injection nozzle 10, that is, the state where predetermined work can be performed.

If two water tanks 15 are provided and can be replaced alternately, the downtime of the replacement work can be shortened, and the work can be performed with high efficiency. In addition, when performing an operation that does not require water injection, the water tank 15 may be removed, so that the operation can be performed while securing a rear view similarly to a normal operation machine.

As described above, according to the working machine 1 with the water injection nozzle according to the present embodiment, since the water tank 15 is detachable, only the water tank 15 is used for replenishing water. Just transport it to the location. Therefore, unlike the working machine with the water injection nozzle according to the conventional example 1, there is no need to secure a space for installing a water tank and a water supply facility near rubble at a narrow work site for replenishing water. Equipment costs are not required, and a narrow work site can be widely used. Further, even at a site without a water source, there is no need to use a vehicle dedicated to water tanks for transporting water, so that the cost of transporting water can be reduced.

Further, according to the working machine 1 with a water injection nozzle according to the present embodiment, unlike the working machine with a water injection nozzle according to the conventional example 2, it is possible to supply water even if there is no nearby water source. Not only does it not require the use of a vehicle dedicated to water tanks, but also does not require the use of long hoses, so that the working range of the working machine 1 with water injection nozzles is not restricted,
There is no need for a hose-holding assistant during forward / backward travel, and there is no danger that the hose will be stepped on by the track shoe and will be wrapped during turning operation, or will be broken by interference with obstacles, which will occur during traveling backward.

Further, according to the working machine 1 with a water injection nozzle according to the present embodiment, like the working machine with a water injection nozzle according to the third conventional example, the weight difference between the empty water tank and the full water tank is suspended in a circle. In terms of stability, it is not necessary to make the body heavy, and since the water tank is detachable, the weight of the body is reduced and it is not limited to a facility such as an unloader, which is advantageous in terms of working cost. Of course, since the water tank 15 is detachable as described above, in the case of replenishing water, the water tank 15 can be attached to the water tank mounting device 14 in a short time and with a simple operation.
And can be removed from the water tank mounting device 14, so in operations that do not require high-pressure water injection,
It is possible to obtain the same rear view and light operability as a normal working machine without a water tank.

Further, according to the working machine 1 with a water injection nozzle according to the present embodiment, water can be replenished to the water tank 15 in such a short time.
Compared to the working machine with water injection nozzle according to 2 or 3,
There is an excellent effect that the concrete structure can be dismantled at a higher efficiency, a crushing process of turning the crushed large concrete block into small blocks, and a work of removing the coal deposits can be performed.

In the above, the working machine with a water jet nozzle having a crawler traveling type lower traveling body has been described as an example. However, the present invention is applicable to a working machine in which the lower traveling body is a tire traveling type. Because you can apply your thoughts,
The embodiment is not limited to the traveling type of the working machine with the water injection nozzle according to the present invention. Also, if the work attachment is spatula or the work attachment is removed, it can be used to remove the coal deposits from the hold walls of the hold, so it is limited to the use of concrete structures for demolition and crushing work. It is not something to be done.

[0037]

As described above, according to the working machine with a water injection nozzle according to the first to fifth aspects of the present invention, the water tank is detachable, and when the water tank is replenished with water, the water tank is used. Only to transport to the water source position, as in the work machine with water injection nozzle according to the conventional example 1, in the vicinity of the water source position to replenish water, and near the pile of debris at the narrow demolition site. There is no need to secure space for installing a water tank, and there is no need to install a high-pressure water supply system at the work site, which eliminates the need for water supply facilities and uses a dedicated vehicle for transporting water. Since there is no need, the cost of transporting water can be reduced. Furthermore, unlike the working machine with a water injection nozzle according to Conventional Example 2, it is not necessary to use a long hose, so that the working range of the working machine with a water injection nozzle is not limited, and There is no danger that the hose will be stepped on the track shoe, that the hose will be wrapped around the work machine with the water jet nozzle, or that the hose will be broken by interfering with obstacles when traveling backwards.

Further, in the case of the working machine with the water injection nozzle according to the conventional example 3, since the weight difference between the empty water tank and the full water tank becomes large in terms of ensuring the stable suspension of the machine body, the large size of the unloader or the like is required. Although it was necessary to prepare a crane, it was only necessary to lift the empty water tank or the main body of the work machine with the water injection nozzle from which the tank was removed. Since water can be replenished to the water tank in a time, the concrete structure is more efficiently dismantled or crushed as compared with the working machine with the water injection nozzle according to the conventional example 1, 2 or 3. Crushing work to convert large concrete lumps into small lumps, removal of coal deposits, and when moving to a work site that does not require water injection, work as usual Without having to worry about the rear view,
There is an excellent effect that the work can be returned to the work machine with a light ground pressure.

[Brief description of the drawings]

FIG. 1 is an overall side view of a working machine with a water injection nozzle according to an embodiment of the present invention.

FIG. 2 is a side view of the working machine with a water injection nozzle, according to the embodiment of the present invention, in which a working arm and a working attachment are omitted.

FIG. 3 is a partially cut-away view from arrow A in FIG. 2;

FIG. 4 is a configuration explanatory view of a bottom guide portion of a water tank according to the embodiment of the present invention.

FIG. 5 is a configuration explanatory view of a water outlet communication mechanism according to the embodiment of the present invention.

FIG. 6 is an explanatory side view of a working machine with a water injection nozzle according to Conventional Example 1.

FIG. 7 is an explanatory side view of a working machine with a water injection nozzle according to Conventional Example 2.

FIG. 8 is an explanatory side view showing a state in which a working machine with a water injection nozzle is suspended in a round state according to Conventional Example 3;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Working machine with a water injection nozzle 2 ... Lower traveling body 3 ... Upper revolving superstructure, 3a ... Operating room 4 ... Working arm, 4a ... Boom, 4b ... Intermediate arm, 4c ...
Tip arm 5 ... Work attachment, 5a ... Crushing teeth, 5b ... Crushing teeth 6 ... Boom undulating cylinder 7 ... Intermediate arm cylinder 8 ... Tip arm cylinder 9 ... Attachment operating cylinder 10 ... Water injection nozzle 11 ... Water supply pipe, 11a ... Tube 11b Hose 12 Water pump 12a Water inlet 13 Water outlet automatic communication mechanism 13a Elastic holding member
13b: water outlet valve seat, 13c: seal ring groove,
13d: seal ring, 13e: nipple 14: water tank mounting device, 14a: tank side guide,
14b: tank bottom guide, 14c: inclined cushion material, 14d: horizontal cushion material 15: water tank, 15a: engaging member, 15b: reverse inclined surface, 15c: suspension ring 16: water outlet, 16a: lower horizontal surface 17: open / close valve

Claims (5)

[Claims] 1. An undercarriage, an upper revolving body mounted on the undercarriage and revolving around a vertical axis as a revolving center, and a work supported by the revolving upper body so as to be able to undulate and bend freely. Arm and a work attachment that crushes or removes the object to be processed is attached to the tip of this work arm,
In a working machine with a water injection nozzle, which is provided with a water injection nozzle for injecting water toward the object to be processed and a water supply pipe for supplying water to the water injection nozzle, A work machine with a water injection nozzle, further comprising a detachable water tank for supplying injection water to the water injection nozzle via the water supply pipe. 2. A water tank mounting device having a tank position adjusting function for automatically adjusting a mounting position of the water tank is provided on the upper swing body.
A working machine with a water injection nozzle according to item 1. 3. The device according to claim 1, wherein a cushion member is provided on one of the upper revolving unit and the lower surface of the water tank. Work machine with water injection nozzle. 4. When the water tank is mounted on the water tank mounting device on the upper swing body, a water outlet provided at a lower portion of the water tank is automatically connected to the water supply pipe. The working machine with a water injection nozzle according to any one of claims 1, 2, and 3, further comprising a water outlet communication mechanism for communication. 5. A water pump for pumping water in the water tank to a water injection nozzle via a water supply pipe is provided on one of the upper revolving unit and the water tank. The working machine with a water injection nozzle according to any one of claims 1, 2, 3, and 4.