JP2552901B2 - High-pressure water injection device and water collecting cover used for the device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to high-pressure removal of asphalt and concrete, and high pressure used for cleaning the wall surfaces of railway vehicles, buildings, etc. The present invention relates to a water jetting device and a water collecting cover used for the device.

[Prior Art] Conventionally, removal of asphalt or concrete and scavenging work have been performed manually by using a rotary cutter or an air hammer. Therefore, the work efficiency was poor.

Therefore, it is conceivable to perform these operations by injecting ultra-high pressure water onto the inner wall surface of the target construction.

However, in that case, it is essential to be able to efficiently recover the injected water and the sludge such as asphalt and concrete that has been removed by the sprayed water.

In addition, it is advantageous to spray high-pressure water at an appropriate inclination angle on the asphalt or concrete wall surface, etc., which is the work target, in order to improve the effect of the above-mentioned deletion and scavenging. It was thought that one line of high-pressure water should be jetted, so it is thought that one nozzle should be properly inclined with respect to its rotation axis.
Therefore, it is difficult to secure the rotational balance of the nozzle due to the ejection thrust (jet effect) when ejecting the ultra-high pressure water, and there is a possibility that the rotation of the nozzle may be hindered.

[Problems to be Solved by the Invention] The present invention has been made in view of the above-mentioned conventional techniques, and a first problem to be solved is to effectively inject injected water and remove sludge such as asphalt and concrete. It is to provide a high-pressure water jetting device that can be collected in a first place and a water collecting cover used for the device.

A second problem to be solved by the present invention is to provide a high-pressure water jetting device in which the rotation balance of the nozzle is secured and there is no risk of impeding the rotation of the nozzle.

[Means for Solving the Problems] In order to solve the above problems, a high-pressure water injection device according to the present invention includes a nozzle body that injects high-pressure water and the like, and high-pressure water and the like ejected from the nozzle body The water collecting cover is provided so as to cover the rebounding area and is provided so as to project forward from the tip of the nozzle body, and sucks and collects high-pressure water and the like ejected from the nozzle body.
Around the front portion side, a large number of strip-shaped cover pieces made of a flexible material are provided with some gaps between them, and some of them are wrapped with each other.

A rotating nozzle body that sprays high-pressure water or the like while rotating the nozzle body, and a part of the cover piece located relatively forward of the nozzle body in the rotational direction is relatively located rearward of the nozzle body in the rotational direction. It is preferable that the cover pieces are arranged adjacent to each other so as to cover a part of the cover pieces from above.

Further, it is more preferable that the nozzle body is provided with a plurality of nozzles that are arranged radially and symmetrically with respect to the center axis line in the front-rear direction toward the front.

The water collecting cover used in the high-pressure water injection device according to the present invention is provided so as to cover the range in which high-pressure water injected from the nozzle body repels from the injection target and to project forward from the tip of the nozzle body. A water collecting cover that sucks and collects high-pressure water and the like ejected from the nozzle body, and a number of strip-shaped cover pieces made of a flexible material are provided around the front side of the water collecting cover with some gaps therebetween. It is configured such that a part thereof is opened and the parts are wrapped with each other.

Also in this case, the nozzle body is a rotating nozzle body that sprays high-pressure water or the like while rotating, and a part of the cover piece located relatively in front of the nozzle body in the rotation direction is relatively the nozzle body. It is preferable that the cover pieces are arranged so as to be adjacent to each other so as to cover a part of the cover pieces located on the rear side in the rotation direction of the above.

[Operation] When the invention according to claim 1 or 4 is used, the front part of the cover piece constituting the water collecting cover is applied to the wall surface or the like of the building to be sprayed, and high pressure water or the like is discharged from the nozzle body. To jet. Then, the jetting pressure is used to perform the washing work for the jetting object, the deleting work, or the picking work. Here, since the cover piece is made of a flexible material, the cover piece adheres to the ejection target without damaging the ejection target.

The high-pressure water hitting the jetting target, the sludge removed by the high-pressure water, and the like are collected by the suction action of the water collecting cover without being scattered to the outside. At this time, since the outside air is sucked into the water collecting cover through the gap between the cover pieces, a high suction and collection effect can be obtained by the action of the air flow.

Further, according to the present invention as set forth in claim 2 or 5, it is possible to prevent high-pressure water or the like sprayed from the rotating nozzle body from splashing to the outside of the water collecting cover through the gap between the cover pieces.

Further, according to the present invention as set forth in claim 3, since the plurality of nozzles are radially arranged with respect to the central axis of the nozzle body and are directed toward the front toward the target, each nozzle is jetted by the jet of high-pressure water or the like. The reaction forces are combined and applied to the rotary nozzle body, and in the radial direction thereof, the radial direction components of the ejection reaction force cancel each other out and balance. Therefore, the rotational balance of the rotary nozzle body is ensured and the rotation of the rotary nozzle body is not hindered.

[Examples] The present invention will be described below based on Examples shown in the drawings.

In the drawings, (1) is a rotary nozzle body, and a shaft (2) extending in the front-rear direction, a head (3) protruding from the front end of the shaft (2), and a front of the head (3). A plurality of nozzle bodies (4) radially and symmetrically arranged with respect to the central axis of the axis (2) in the front part. In the illustrated embodiment, the plurality of nozzle bodies (4) are provided while being inclined while maintaining a symmetrical arrangement relationship with respect to the central axis of the axis (2) of the rotary nozzle body (1).

Each of the above nozzles (4) is provided inside the rotating nozzle body (1).
And a channel (5) communicating with the shaft (2) and opened to the side of the shaft (2). In the case of the embodiment shown in the drawing, four cross-shaped openings (5a) are provided on the side of the shaft (2) of the flow path (5).

In the illustrated embodiment, the number of the nozzles (4) is two, but the number is not limited, and the shaft (2) is not limited.
It may be arranged radially and symmetrically with respect to the central axis line of.

(6) is a housing in which the shaft (2) of the rotary nozzle body (1) is fitted and rotatably supported. Further, the housing (6) is provided with a supply passage (7) for supplying high-pressure water or the like communicating with the opening (5a) of the flow passage (5) of the rotary nozzle body (1).

In the embodiment shown in the drawings, the housing (6) is provided with a fitting insertion hole (8) which fits the shaft (2) of the rotary nozzle body (1), and the shaft (2) is provided in the fitting insertion hole (8). It has been inserted.

The supply part (7) has an annular supply path (around the insertion hole (8) formed at a position corresponding to the opening (5a) of the flow path (5) of the rotary nozzle body (1). 7a)
And a supply hole (7b) communicating with the annular supply path (7a).

In the embodiment shown in the drawings, one end of the pipe (10) is connected to the opening of the supply hole (7b) through a joint (9), and the other end of the pipe (10) is connected to the cover (11). A hose (14) for supplying high-pressure water, etc., which is connected to a joint (12) provided and has a joint (13) suitable for the joint (12), is detachably connected.

A packing (15) for preventing water leakage is embedded on both sides of the annular supply passage (7a) around the fitting insertion hole (8) of the housing (6), and an annular shape is provided outside the packing (15). A drainage channel (16) is formed, and a bush (17) is embedded outside the annular drainage channel (16), and the shaft (2) of the rotary nozzle body (1) has a packing (15) and a bush (15). 1
It comes in contact with 7) and rotates.

The annular drainage channel (16) has a drainage hole (1) opened at a position on a drainage port (18) side described later outside the housing (6).
9) are communicated with each other, and even if high-pressure water or the like leaks from the packing (15) from the drain hole (19) and the annular drainage channel (16), the water or the like may interfere with other components. It is designed to be drained without coming.

In the case of the embodiment shown in the drawings, the housing (6) is fixed to the support (20), and the support (20) is provided with the connecting portion (21), which is required by using the connecting portion (21). It can be easily attached to a robot or drive arm.

In the figure, (22) is a screw hole screwed into a screw portion provided on the robot or the like.

In the case of the embodiment shown in the drawings, a collar (23) is provided between the head (3) of the rotary nozzle body (1) and the housing (6), and each nozzle is operated by the action of the collar (23). A force in the axial direction received by the rotary nozzle body (1) is supported by the ejection reaction force of the body (4). As the collar (23), for example, a plain bearing is used.

Further, in the present invention, a motor (24) for rotating the rotary nozzle body (1) is provided.

In the embodiment shown in the drawings, the motor (24) is a support (20).
The output shaft is fixed with a sprocket (25). And the shaft (2) of the rotary nozzle body (1)
A serration portion (26) and a screw portion (27) are formed at the rear end of the sprocket (2).
8) is engaged with the washer (29) and the nut (30) screwed to the threaded portion (27) causes the sprocket (28) to move behind the shaft (2) of the rotary nozzle body (1). It is fixed to the end.

The nut (30) and the sprocket (28) have a function of preventing the rotary nozzle body (1) from coming out to the left in FIG.

A roller chain (31) is wound around the sprockets (25) and (28). In FIG. 1, (32) is a bearing for supporting the sprocket (28).

Therefore, in the case of the illustrated embodiment, the motor (2
When driving 4), the rotary nozzle body (1) is rotated via the sprocket (25), the roller chain (31) and the sprocket (28).

In FIG. 1, reference numeral (33) is a lead wire for supplying electric power to the motor (24), the end portion of which is connected to a connector (34) provided on the cover (11). 3
A power supply cable (36) having a connector (35) conforming to 4) is detachably connected.

The present invention is configured so that the injected water and the sludge such as the removed concrete or asphalt or the washed sludge can be efficiently collected.

That is, the water collecting cover (37) covers the housing (6) and the rotating nozzle body (1) so as to cover the range where high-pressure water or the like injected from the nozzle (4) repels from the injection symmetry.
Is provided, and the drain port (18) is provided below the water collecting cover (37).
Is provided.

The water collecting cover (37) protrudes forward beyond the tip of the rotary nozzle body (1), and the front part of the water collecting cover (37) is brought into contact with the injection target to collect water. The water collecting cover (37) is provided with a number of strip-shaped cover pieces (38) made of a flexible material such as rubber or plastic material around the front side thereof.
As shown in FIG. 2, these cover pieces (38) are arranged in a tubular shape with some of them being overlapped with each other so that there is a gap between them.

A drain hose (39) is connected to the drain port (18),
A vacuum pump (not shown) on the other end of the drain hose (39),
A cyclone and a storage tank are provided, and the water collecting cover (37) has a suction and recovery function.

Therefore, the water containing the sludge and jetted out is prevented from being scattered by the water collecting cover (37), and the negative pressure inside the water collecting cover (37) draws it toward the drain port (18) side to the outside. Collected without scattering.

By the way, the front end opening of the water collecting cover (37) may be simply a cylindrical body which is different from the one shown in the figure, but in that case, the vacuum inside the water collecting cover (37) is However, there is a drawback in that the suction action of water containing jetted sludge is reduced. In this respect, in the case of the embodiment shown in the drawings, the water collecting cover (37) is formed of a large number of strip-shaped covers (38) at the front part, and these cover pieces (38) are
Part of them are provided so as to overlap each other so that there is a gap between them. Therefore, when the water collecting cover (37) performs a suction action, the outside air is sucked into the water collecting cover (37) through the gap between the cover pieces (38), and the airflow thereof causes the sludge to be removed. There is an advantage that the suction action of water after the contained jet is increased.

The ejected water is obliquely ejected by the rotary inertia force generated by the rotation of the rotary nozzle body (1). Therefore, it is necessary to take care so that the water after jetting does not splash outside from the gap between the cover pieces (38).

Therefore, as shown in FIG. 2, a part of the cover piece (38) located relatively in front of the rotating nozzle body (1) in the rotating direction X is relatively behind the rotating nozzle body (1) in the rotating direction X. It is desirable to dispose the cover pieces (38) so as to be adjacent to each other so as to cover a part of the cover pieces (38) located at.

When performing work using the high-pressure water rotary spraying device having the above-mentioned configuration, the front end of the cover piece (38) is brought into contact with the spray target, and the high-pressure water or cleaning agent is supplied from the high-pressure water supply hose (14). Supply high-pressure water, etc., and simultaneously drive the motor (24).

As a result, the rotary nozzle body (1) is rotated and high-pressure water or the like is supplied to the pipe (10), the joint (9), and the supply hole (7).
b), rotating injection from each nozzle (4) through the annular supply passage (7a) and the flow passage (5), and removal of asphalt, concrete, etc., and objects to be washed such as railway cars, walls of buildings, etc. Is ejected toward the injection target (not shown).

Then, although not shown, the entire injection device is moved along the injection target by a robot, a drive arm, or the like.

In the present invention, since the plurality of nozzles (4) are arranged in the front portion of the rotary nozzle body (1) radially and symmetrically with respect to the central axis of the rotary nozzle body (1), the nozzles (4) are inclined forward. The jet reaction force received by the jetting of high-pressure water 4) is combined and applied to the rotary nozzle body (1), but the radial direction components of the jet reaction forces cancel each other out and balance in the radial direction.

Therefore, the rotational balance of the rotary nozzle body (1) is secured, and the rotation of the rotary nozzle body (1) is not hindered.

Further, as described above, by the action of the water collecting cover (37) and the drainage port (18), the jetted water containing sludge and the like can be efficiently sucked and collected.

In the case of the embodiment shown in the drawings, the rotary nozzle body (1) can be removed and attached simply by removing the nut (30), which is convenient for maintenance and inspection such as replacement of the packing (15) which is a consumable item.

A removable lid (40) is provided at a position of the cover (11) facing the nut (30), and the nut (30) can be easily removed and attached. Further, in the case of the embodiment shown in the drawings, since the coupling portion (21), the joint (12) and the connector (34) are provided, they are mounted on a robot, a driving arm, etc., connected to a high-pressure water supply hose (14) and a cable ( Connection of 36) is extremely easy and convenient.

Further, the drainage aus (39) can be connected to the drainage port (18) by the fixing band (41), which is simple.

[Effect of the Invention] According to the present invention as set forth in claim 1 or 4, when the front portion of the cover piece is brought into contact with the jetting target and the high pressure water or the like is sucked and collected by the water collecting cover, Since external air is sucked into the water collecting cover through the gap between them, a high suction / collection effect is obtained by the action of the air flow.

Further, according to the present invention as set forth in claim 2 or 5, it is possible to prevent high-pressure water or the like sprayed from the rotating nozzle body from splashing to the outside of the water collecting cover through the gap between the cover pieces.

Further, according to the present invention as set forth in claim 3, the rotational balance of the rotary nozzle body is secured, and the rotation of the rotary nozzle body is not hindered.

[Brief description of drawings]

The drawings show one embodiment of the present invention. FIG. 1 is a longitudinal cross-sectional view of an essential part, and FIG. 2 is a side view seen from the left side in FIG. (1) ... Rotating nozzle body, (2) ... shaft, (3) ... head, (4) ... nozzle, (5) ... flow path, (6) ... housing, (7) ... … Supply path, (24) …… motor, (37) …… water collection cover, (38) …… cover piece.

Claims (5)

(57) [Claims] 1. A nozzle body for ejecting high-pressure water and the like, and a nozzle body provided so as to cover a range where the high-pressure water and the like ejected from the nozzle body repels from an ejection target and to project forward from the tip of the nozzle body. A water collecting cover for sucking and collecting high-pressure water or the like ejected from the nozzle body, and the water collecting cover has a large number of strip-shaped cover pieces made of a flexible material around the front side thereof. A high-pressure water jetting device, characterized in that it is provided with some gaps between each other and parts thereof are wrapped around each other. 2. A rotating nozzle body for injecting high-pressure water or the like while the nozzle body is rotating, and a part of a cover piece located relatively forward of the nozzle body in the rotation direction is relatively located in the nozzle body. 2. The high-pressure water jetting device according to claim 1, wherein the cover pieces are arranged so as to be adjacent to each other so as to cover a part of the cover pieces positioned rearward in the rotation direction from above. 3. The high pressure according to claim 2, wherein the nozzle body is provided with a plurality of nozzles which are arranged radially and symmetrically with respect to a central axis line in the front-rear direction of the nozzle body toward the front. Water injection device. 4. The high-pressure water or the like ejected from the nozzle body is provided so as to cover the range where the high-pressure water or the like ejected from the nozzle body is repelled from the object to be ejected, and protrudes forward from the tip of the nozzle body. A water collecting aber to collect,
A large number of strip-shaped cover pieces made of a flexible material are provided around the front part side thereof with some gaps between them, and a part of the strip-shaped cover pieces are wrapped around each other to be provided with high-pressure water, etc. Water collection cover used for the injection device. 5. A rotary nozzle body for injecting high-pressure water or the like while the nozzle body rotates, wherein a part of a cover piece located relatively forward of the nozzle body in the rotation direction is relatively relative to the nozzle body. The water collecting device for use in a high-pressure water jetting device according to claim 4, wherein the cover pieces are arranged so as to be adjacent to each other so as to cover a part of the cover pieces positioned rearward in the rotation direction from above. cover.