JP5534860B2 - Nozzle head for water jet gun - Google Patents

Description

  The present invention relates to a nozzle head attached to a water jet gun used for a removal operation utilizing a water jet.

  In recent years, water jets have been studied for use in various removal operations such as cleaning of outer walls, paint peeling, and asbestos removal.

  In particular, there is a method using an ultra-high pressure water jet gun as a method of performing removal work by a water jet with high efficiency and reliability. In this method, ultra high pressure water supplied from a tank via an ultra high pressure pump is ejected from an ejection nozzle of the nozzle head while rotating the nozzle head attached to the tip.

  A rotating shaft and an ultra-high pressure water supply channel are disposed in the tubular barrel portion of the water jet gun, and at the same time the nozzle head is mounted on the tip of the rotating shaft, the channel inlet in the nozzle head serves as the outlet of the supply channel. Communicated. The operator switches the injection / stop of ultra-high pressure water by holding the gun with the nozzle head facing the wall so that the axis of rotation is approximately perpendicular to the wall to be treated, and by operating the switch at hand. While proceeding.

  In the nozzle head, a plurality of spray nozzles are arranged on the front surface of the tip, and ultra-high pressure water from a water jet gun is branched by a flow path in the head and sprayed from each spray nozzle. In the nozzle head, for example, as shown in FIGS. 6 and 7, the jet direction of each jet nozzle is parallel to the rotation axis and a jet is jetted in a cylindrical shape, or the jet angle is predetermined with respect to the rotary axis There are various types such as those in which a jet is ejected in a conical shape with an inclination angle (see, for example, Patent Documents 1, 2, and 3). Such a nozzle head is appropriately selected according to the actual object.

Japanese Patent No. 2668696 JP-A-11-200509 JP-A-9-173916

  As described above, in the nozzle head for mounting a conventional water jet gun, the injection nozzle is formed in a fixed state, and a nozzle having a suitable injection angle is selected according to the application and object, and the head is replaced each time. It took time and effort. This is because, as the collision angle of the water jet with respect to the processing target surface is inclined from the vertical, the cutting force that bites into the collision force as if the jet squeezed increases and the removal capability improves, so the adhesion strength of the removal target to the wall surface increases. This is because a larger one and a thicker one require use of a nozzle head having a larger ejection angle with respect to the rotation axis.

  On the other hand, in order to increase the removal capability, the jet water may be set to a higher pressure and a larger flow rate. In this case, a large amount of wastewater is generated as the amount of water increases, and depending on the environment, wastewater treatment and measures against water leakage are required. However, since it is difficult to take these measures, it is currently used only for construction outside the building where wastewater recovery does not become a problem, and is mainly used for renovation work inside the building. There is no.

  In view of the above problems, an object of the present invention is to provide a water jet gun mounting nozzle head that can easily improve the removal capability in a removal operation with a water jet gun, and can ensure the same or higher removal capability even with a lower amount of water than in the past. Is to provide.

In order to achieve the above object, a water jet gun mounting nozzle head according to a first aspect of the present invention is detachably mounted on the rotating shaft at the tip of a water jet gun having a rotating shaft inside, In a nozzle head for mounting a water jet gun for jetting ultra-high pressure water supplied from a supply source through the water jet gun from an injection nozzle,
A main header having a mounting portion with the rotating shaft, and an internal flow path for circulating ultra-high pressure water supplied from a water jet gun;
A jet nozzle for jetting the ultra-high pressure water, and is detachably attached to one of the left and right side surfaces of the main header in the initial setting state with the vertical plane including the rotation center axis of the rotary shaft interposed therebetween. 1 sub-header and a second sub-header detachably attached to the other of the left and right side surfaces ,
The first and second sub-headers can be rotated in a direction perpendicular to the rotation surface of the rotary shaft with respect to the main header in the initial setting state, and the rotation of the injection axis of the injection nozzle by the rotation. An angle adjustment mechanism for fixing an inclination angle along a vertical plane including the rotation center axis with respect to the center axis so as to be changeable to an arbitrary angle, and an internal flow path of the main header and an injection nozzle over the entire rotation range. An injection flow path that communicates , and
The first sub-header and the second sub-header are respectively parallel injection type first injection nozzles and injection axes that are parallel to the rotation center axis on a horizontal plane that includes the rotation center axis. An inward injection type second injection nozzle inclined to the main header side by a predetermined angle with respect to the rotation center axis on a horizontal plane including:
The angle adjustment mechanism selectively fixes the first and second injection nozzles as high-pressure water injection nozzles to the object to be processed and directs the injection direction toward the front side of the main header to fix the position of the sub header to the main header. To do .

A water jet gun mounting nozzle head according to a second aspect of the invention is the water jet gun mounting nozzle head according to the first aspect , wherein the first injection nozzle and the second injection nozzle in the same sub head are mutually injected. axially, but extending in opposite directions along a diameter on the vertical plane containing the center of rotation of the sub-header.

A water jet gun mounting nozzle head according to a third aspect of the present invention is the water jet gun mounting nozzle head according to the first aspect , wherein the angle adjusting mechanism is an injection nozzle selected as a high pressure water injection nozzle. The subheader can be rotated and fixed so that the injection axis can be changed within the range of the elevation angle of 0 to 45 degrees with respect to the rotation center axis or within the range of the depression angle of 0 to 45 degrees with respect to the rotation center axis. To do.

A water jet gun mounting nozzle head according to a fourth aspect of the present invention is the water jet gun mounting nozzle head according to the third aspect , wherein the angle adjusting mechanism screws the sub header to the main header so that the sub header can be released. A bolt member and a bolt hole provided in the sub-header;
The bolt hole has a slit shape extending in an arc shape over a predetermined angle interval, and the bolt member can be relatively moved in the slit-shaped bolt hole over the entire width region in the unlocked state. It is characterized by being.

The water jet gun mounting nozzle head according to claim 5 is the water jet gun mounting nozzle head according to claim 1 , wherein the first injection nozzle and the second injection nozzle in the same subheader are the rotation center. The injection axes extending in the injection direction from the subheader rotation center on the vertical plane including the axis are arranged so as to form an angle of 45 degrees or less.

Water jet gun mounting nozzle head according to the invention of claim 6 is the water jet gun mounting nozzle head according to claim 1, the injection nozzle and the injection nozzle of the second sub-header of the first subheader The space | interval along the horizontal direction orthogonal to the said rotating shaft in between is 20-30 mm, It is characterized by the above-mentioned.

A water jet gun mounting nozzle head according to a seventh aspect of the invention is the water jet gun mounting nozzle head according to the sixth aspect , wherein the inward injection type injection nozzle is the center of rotation of the injection axis. An inward inclination angle toward the main header with respect to the rotation center axis on a horizontal plane including the axis is 5 degrees.

  In the nozzle head for mounting the water jet gun of the present invention, at least one of the left and right side surfaces sandwiching the vertical surface including the central axis of the rotating shaft of the main header in the initial setting state mounted on the rotating shaft of the water jet gun, A sub-header having an injection nozzle is attached so as to be rotatable in a direction orthogonal to the rotation surface, and the ultra-high pressure water supplied through a water jet gun and flowing through the internal flow path of the main header extends over the entire rotation range of the sub-header. Injected from the injection nozzle through an injection flow path communicating with the internal flow path, and an inclination along a vertical plane including the rotation center axis of the injection axis of the injection nozzle with respect to the rotation center axis by an angle adjustment mechanism Because the angle is fixed so that it can be changed to any angle by rotating the subheader, the subheader can be rotated relative to the main header. With simple operation, the nozzle head can be replaced without increasing the amount of water used, and the removal angle can be increased by increasing the injection angle with respect to the rotation axis. Since the removal capability can be obtained and the removal capability can be changed according to the jetting angle, there is an effect that a desired removal capability can be obtained according to the removal object and application with the same nozzle head.

It is a block diagram which shows the nozzle head for water jet gun mounting | wearing by 1st Example of this invention, (a) is a schematic side view of this nozzle head, (b) is a schematic front view, (c) is seen from upper direction. FIG. It is a side view which shows the mounting state to the water jet gun in the initial setting state of the nozzle head of FIG. It is a bar graph which shows the result of the removal test by the water jet gun which mounted | wore with the nozzle head of FIG. 1, and shows the removal rate (m < ² > / h) for every type of nozzle head. It is a block diagram which shows the nozzle head for water jet gun mounting | wearing by the 2nd Example of this invention, (a) is a schematic side view of this nozzle head, (b) is a schematic front view, (c) is seen from upper direction. FIG. It is a block diagram which shows the nozzle head for water jet gun mounting | wearing by the 3rd Example of this invention, (a) is a schematic perspective view of this nozzle head, (b) is a schematic permeation | transmission figure seen from upper direction. It is a schematic block diagram which shows an example of the conventional nozzle head, (a) is a front view, (b) is a side view. It is a schematic block diagram which shows the other example of the conventional nozzle head, (a) is a front view, (b) is a side view.

  The nozzle head for mounting the water jet gun according to the present invention rotates on at least one of the left and right side surfaces sandwiching the vertical surface including the central axis of the rotating shaft of the main header in the initial setting state mounted on the rotating shaft of the water jet gun. A sub-header that is mounted so as to be rotatable in a direction perpendicular to the surface is provided. An injection nozzle for injecting ultra-high-pressure water supplied through a water jet gun to the sub-header and an external supply in a state where the rotary shaft is mounted There is provided an injection flow path that communicates over the entire rotation range with respect to the internal flow path of the main header for circulating the ultra-high pressure water supplied from the source through the water jet gun, An inclination angle of the injection axis of the injection nozzle along the vertical plane including the rotation center axis with respect to the rotation center axis is arbitrarily determined by rotating the subheader. It is intended to modify secured to angle. It can be said that the inclination angle is an inclination angle in the vertical direction perpendicular to the horizontal plane including the rotation center axis.

  In such a configuration of the present invention, the injection axis of the injection nozzle does not overlap the rotation axis, and the water jet is injected at a position away from the rotation axis. Even if the injection angle along the vertical plane including the rotation center axis is 0 and the injection direction is parallel to the rotation axis, a rotational force is applied to the water jet along with the rotation of the main header, and the injection locus is spiral. Become. For this reason, when the extension line of the horizontal axis of rotation intersects at right angles, the collision of the water jet with the wall surface to be treated does not perpendicularly strike the wall surface but always impinges at an inclined incident angle, so that it can bite into the collision force. High removal ability is obtained by applying cutting force.

  Moreover, since the water jet injection angle with respect to the rotation axis from the injection nozzle can be arbitrarily changed with only a simple operation of rotating the sub header with respect to the main header, replacement of the nozzle head does not increase the amount of water used, The removal capability can be increased by increasing the injection angle with respect to the rotation axis. That is, it is possible to obtain the same removal capability by reducing the amount of jet water while maintaining the same nozzle head. In addition, since the removal capability can be changed according to the ejection angle, a desired removal capability corresponding to the object to be removed and the application can be obtained with the same nozzle head.

  The initial setting state in the present invention refers to a water jet in which the rotation axis is horizontal, the gun handle or the like is directed vertically downward, and the nozzle head at the tip of the gun is directed to the processing surface which is a vertical surface. This is a state assuming an initial posture in which a gun is set.

  Further, if the subheader includes two subheaders, a first subheader that is detachably attached to one of the left and right side surfaces of the main header and a second subheader that is detachably attached to the other, the subheader is provided in each subheader. Two water jets can be simultaneously jetted by a total of at least two of the jet nozzles provided, and the removal capability can be further increased. In this case, even if the injection angle with respect to the rotation axis is the same between the injection nozzles in the first and second subheaders, since the injection nozzles are spaced from each other with the main header in between, the injection trajectories of both water jets are Since the process proceeds in a twisted manner without crossing each other, high cutting ability can be obtained without interfering with each other and inhibiting the power of the jets.

  Of course, two different types of water jets can be jetted by setting different jetting directions and jetting angles between the jet nozzle of the first subheader and the jet nozzle of the second subheader. In this case, since one water jet having a relatively small injection angle with respect to the rotation axis is injected inside the other water jet having a relatively large injection angle with respect to the rotation axis, concentric circles having different diameters are formed on the surface to be processed. Will be drawn. Therefore, when both are viewed as one jet, the collision area in the outer circumference is dense, and the overall processing efficiency is high.

  Note that, as a basic configuration of the injection nozzle, a parallel injection type in which the injection axis is parallel to the rotation center axis on a horizontal plane including the rotation center axis of the rotation axis is assumed. Therefore, when the angle of the ejection axis with respect to the rotation center axis set by the rotation of the subheader is 0, the outline shape of the entire water jet formed along with the rotation of the nozzle head is a cylindrical shape, but the ejection axis is When the spray angle is set so as to incline with an elevation angle or a heel angle with respect to the rotation center axis, the contour shape of the entire water jet at the time of rotation becomes a conical shape. At this time, the water jet diffuses in the outer circumferential direction and the collision force is also dispersed.

  Therefore, the first sub-header and the second sub-header are provided with at least one parallel injection type injection nozzle on one side, and on the other side, the injection axis is inwardly inclined on the main header side on the horizontal plane including the rotation center axis. If the structure is provided with at least one injection type injection nozzle, the water jet injected from the inward injection type injection nozzle has an inclination angle of 0 relative to the rotation center axis of the injection axis due to the rotation of the subheader. When the entire water jet nozzle is converged toward the extension line of the rotation center axis, the diffusion of the water jet from the other injection nozzle can be offset and reduction in jet power can be suppressed.

  Further, if the first subheader and the second subheader are provided with both the parallel injection type first injection nozzle and the inward injection type second injection nozzle, respectively, one subheader is accidentally attached to the main subheader during assembly. When the first injection nozzle or the second injection nozzle is selected as the injection nozzle when attaching to the header, a different second injection nozzle or first injection nozzle is used for the other sub-header to be attached to the main header later. Therefore, there is a degree of freedom in selecting the injection nozzle in the sub-header that is first attached to the main header, and the assembly process is simplified accordingly.

  Further, in each subheader, the first injection nozzle and the second injection nozzle are configured such that the injection axis directions of the subheaders extend in opposite directions along the diameter on the vertical plane including the rotation center of the subheader. Accordingly, the first injection nozzle and the second injection nozzle are selectively used as high-pressure water injection nozzles to the object to be processed so that the injection direction is directed to the front side of the main header and the position of the sub header is fixed to the main header. For example, either the first subheader or the second subheader can be attached to both the left and right side surfaces of the main header, and the first and second injection nozzles as high pressure water injection nozzles can be selected from either side of the subheader. In addition, the degree of freedom during assembly is further increased, and assembly errors are unlikely to occur even with a simple design.

  Moreover, the changeable adjustment angle of the injection axis of the injection nozzle selected as the high-pressure water injection nozzle by the angle adjustment mechanism is within the range of the elevation angle of 0 to 45 degrees and / or 0 to 45 degrees. It is preferable to be within the range of the heel angle.

  This is because if the spray angle from the rotation center axis is too large, the water jet diffuses too much and a good removal capability cannot be obtained, so it is not adjusted beyond the upper limit angle that can ensure a good removal capability. The angle is adjusted within the range of angle adjustment.

  Conventionally, for example, in a removal process using an ultra-high pressure water jet at a pressure of 250 MPa, injection is performed with a distance of about 10 cm from the nozzle head to the wall surface to be processed. The upper limit of the injection angle at which good removal capability can be secured at the injection distance is 45 degrees with respect to the rotation center axis. Therefore, in the initial setting state, an angle adjustment range in which the angle adjustment mechanism can be performed with respect to one injection nozzle of the subheader may be an elevation angle or a heel angle of 0 to 40 degrees with respect to the rotation center axis. In order to secure more reliable removal capability, it is more desirable to set the upper limit to 30 degrees.

  As a specific configuration of the angle adjusting mechanism, a bolt hole having a slit shape extending in an arc shape over a predetermined angular interval is provided at a corresponding position of the sub header, and the sub header can be released via the bolt hole. A structure in which the main header is screwed with a bolt member is preferable as a simple structure. The bolt member is relatively movable in the slit-shaped bolt hole over the entire width region in a state where the screw fixing is loosened.

  In this configuration, the position of the bolt member with respect to the main header is fixed, and the sub-header rotates with respect to the main header by moving the slit-shaped bolt hole relative to the bolt member. Accordingly, when the injection nozzle of the sub header reaches a desired injection angle, the relative movement is stopped and the bolt is fixed with a screw, so that the injection angle of the injection nozzle is fixed. The angular interval of the arcuate slit shape may correspond to the rotation range of the subheader corresponding to the desired injection angle adjustment range. Therefore, for example, when the upper limit of the angle adjustment range is desired to be 45 degrees, the slit shape of the bolt hole may be formed in an arc shape over an angular interval of 45 degrees.

  When the first injection nozzle and the second injection nozzle in the same subheader have injection directions opposite to each other along the diameter direction passing through the rotation center of the subheader, one of the injection nozzles is used for high pressure water injection. If it is positioned on the front side of the header, the injection direction of the other injection nozzle is directed toward the rear worker side, so that it is blocked and injectable.

  Therefore, the first injection nozzle and the second injection nozzle in the same subheader form an angle of 45 degrees or less between the injection axes extending in the injection direction from the subheader rotation center on the vertical plane including the rotation center axis. If the arrangement is close to each other, both the first and second injection nozzles can be utilized for high-pressure water injection. In this case, the first subheader and the second subheader can utilize water jets from a maximum of four spray nozzles, and the removal capability can be significantly increased.

  On the other hand, the larger the distance along the direction orthogonal to the rotation axis between the injection nozzle of the first subheader and the injection nozzle of the second subheader, the larger the diameter of the circle drawn on the processing surface by the rotating water jet. However, if the interval is too large, the process is difficult to proceed uniformly. Therefore, the interval is preferably narrow. Moreover, in order to ensure the mechanical strength with respect to the pressure of ultra-high pressure water, a lower limit arises also in the thickness of a main header and a subheader according to the required internal flow path of a main header, the injection flow path of a subheader, and a nozzle diameter. In view of these, as a design suitable for practical use, it is preferable that the interval along the horizontal direction perpendicular to the rotation axis between the injection nozzle of the first subheader and the injection nozzle of the second subheader is 20 to 30 mm. .

  Further, the inward injection type injection nozzle is directed toward the rotation center axis when an inward inclination angle toward the main header with respect to the rotation center axis on the horizontal plane including the rotation center axis of the injection axis is too large. Thus, the converged water jet collides with the surface to be processed in a state where the water jet diffuses away from the rotation center axis. In an actual working situation where the distance between the surface to be processed and the nozzle head is generally about 10 cm, the inward angle is 5 degrees in order to ensure a good convergence of the water jet. Is preferable.

  1 and 2 show a water jet gun mounting nozzle head according to an embodiment of the present invention. FIG. 1A is a schematic side view of the nozzle head, FIG. 1B is a schematic front view, and FIG. 1C is a schematic transmission view seen from above. FIG. 2 is a side view showing a state in which the nozzle head is mounted on the water jet gun in an initial setting state.

  The head nozzle 1 mainly includes a main header 2 having a mounting portion 3 mounted on a rotating shaft 14 disposed in the barrel portion at the tip of a tubular barrel portion 13 of the water jet gun 10, and the main header 2. The first sub-header 5A and the second sub-header 5B are attached to the left and right side surfaces sandwiching the vertical plane X including the rotation center axis of the rotation shaft 14 so as to be rotatable by an angle adjustment mechanism.

  The main header 2 is provided with an internal flow path 4 through which ultra-high pressure water supplied from the water jet gun 10 is circulated to each sub-header (5A, 5B). The internal flow path 4 is connected to the rotating shaft 14 of the mounting portion 3. At the same time as mounting, it is connected to the ultra high pressure water supply path on the water jet gun side.

  On the other hand, the first and second sub-headers (5A, 5B) can be rotated in a direction perpendicular to the rotation surface of the rotation shaft 14, that is, in a direction along the vertical surface X. Each of the injection nozzles (7A, 7B) for injecting is provided, and the internal flow path 4 of the main header 2 and the injection nozzles (7A, 7B) communicate with each other over the entire rotation range of the sub header. A flow path (6A, 6B) is formed. In the present embodiment, the injection nozzles (7A, 7B) are a parallel injection type in which the injection axis is parallel to the rotation center axis on a horizontal plane including the rotation center axis of the rotation axis.

  The angle adjustment mechanism of the present embodiment includes two bolt holes 8 each having a slit shape extending in an arc shape over a predetermined angle interval provided at a corresponding position of each subheader (5A, 5B). A bolt member 9 that is screwed to the main header 2 so that the sub-headers (5A, 5B) can be released via the bolt holes 8 is configured.

  Each bolt member 9 is relatively movable in the slit-shaped bolt hole 8 over the entire width region in a state where the screw fixing is loosened. Therefore, if the slit-shaped bolt hole 8 is moved with respect to the bolt member 9 fixed to the main header 2, the sub headers (5 </ b> A, 5 </ b> B) are rotated with respect to the main header 2. Therefore, when the injection nozzle reaches the desired injection angle in the rotation, the injection angle of the injection nozzle is fixed by stopping the relative movement and screwing with the bolt member 9. This angle adjustment may be performed for each of the injection nozzle 7A of the first subheader 5A and the injection nozzle 7B of the second subheader 5B.

  The angular interval of the arcuate slit shape of the bolt hole 8 may correspond to the rotation range of the sub header corresponding to the desired injection angle adjustment range. In the present embodiment, the adjustment of the injection angle of the injection nozzle 7A of the first subheader 5A is an elevation angle range of 0 to 30 degrees with respect to the rotation center axis, and the adjustment of the injection angle of the injection nozzle 7B of the second subheader 5B is the rotation center. The heel angle range of 0 to 30 degrees with respect to the shaft was set, and the slit shape of each bolt hole 8 was formed in an arc shape over an angular interval of 30 degrees.

  The nozzle head 1 having the above configuration was attached to a water jet gun 10. The water jet gun 10 has an ultra-high pressure hose connection port 12 at a rear end portion of a tubular barrel portion 13 extending horizontally from a main body 11, and ultra-high pressure water fed from an external ultra-high pressure pump to the connection port 12. A hose for supplying is connected. Further, the main body 11 is provided with a grip portion 15 having a lever 16 serving as an ON / OFF switch for super-high pressure water injection and a motor for rotating the rotation shaft in the gun barrel portion 13 in conjunction with the lever 16. ing. A nozzle cover 18 having an opening in the front is attached to the distal end side of the gun barrel portion 13, and the nozzle head 1 is mounted on the rotary shaft 14 in the nozzle cover. Further, a vibration isolating handle 17 is attached to the gun barrel portion 13 so that an operator can stabilize the gun barrel portion 13.

By using the water jet gun 10 described above, the nozzle head 1 is water jet with an injection angle of the injection nozzle 7A of the first subheader 5A set to an elevation angle of 30 degrees and an injection angle of the second subheader 5B set to a depression angle of 30 degrees. A removal test by spraying was conducted. In the test, a wet fireproof coating simulation sample (0.2 m ² , thickness 5 cm) and an adhesive (0.48 m ² ) after applying a release agent after removing the roof folded-plate felton were targeted for removal.

  As the nozzle head 1 of the present embodiment, the injection nozzles (7A, 7B) have a diameter of 0.2 mm (Example 1-1) and the case of a diameter of 0.25 mm (Example 1-2). In addition, the case where a conventional type nozzle head in which the injection nozzles shown in FIGS. 6 and 7 are fixed and the injection axes are parallel to each other was used as a control. The reference nozzle head is provided with three injection nozzles shown in FIG. 6 having a nozzle diameter of 0.2 mm (control 1) and two injection nozzles shown in FIG. The nozzle has a diameter of 0.2 mm (Control 2) and the nozzle has a diameter of 0.25 mm (Control 3).

The above five types of nozzle heads were subjected to removal tests on the above two types of objects, and the test results are summarized in Table 1 below. Further, the removal rate (m ² / h) by each nozzle head is represented by the bar graph of FIG. In either case, the water jet was jetted with the distance between the surface to be removed and the nozzle head set to 5 to 10 cm.

  From the above results, especially in the case where the wet refractory coating is to be removed, the nozzle head according to the present embodiment has a removal rate twice as high as that of the control nozzle head having the same number of the same diameter injection nozzles. In addition, in the same discharge water amount conditions, the removal rate of Example 1-2 is five times that of Control 1. It was confirmed that the removal ability was much higher than that of the conventional type. It was also confirmed that the amount of water used can be reduced as compared with the conventional type with the same removal capability. The change of the removal capability in the same nozzle head is performed by changing the injection angle of the injection nozzle (7A, 7B) by a simple operation of rotating the first and second subheaders (5A, 5B) with respect to the main header 2. Just do it.

  In the first embodiment, the case where one injection nozzle is provided in each subheader has been shown. However, as the second embodiment of the present invention, two first injection nozzles and two second injection nozzles are provided in each subheader. FIG. 4 shows a case where a total of four injection nozzles are used. FIG. 4A is a schematic side view of the nozzle head, FIG. 4B is a schematic front view, and FIG. 4C is a schematic transmission view seen from above.

  The nozzle head 21 according to the present embodiment has a configuration that is basically the same as that of the first embodiment except for the main header and the angle adjustment mechanism other than the injection nozzle and the injection flow path of each subheader. In other words, the nozzle head 21 mainly includes a main header 22 having a mounting portion 23 that is mounted on the rotating shaft 14 of the water jet gun 10, and left and right side surfaces of the main header 22 across the vertical surface X. Each includes a first subheader 25A and a second subheader 25B that are rotatably attached along the vertical plane X by an angle adjusting mechanism.

  The main header 22 is provided with an internal flow path 24 through which ultra-high pressure water supplied from the water jet gun 10 is circulated to each sub-header (25A, 25B), and the internal flow path 24 is connected to the rotating shaft 14 of the mounting portion 23. At the same time as mounting, it is connected to the ultra high pressure water supply path on the water jet gun side. The angle adjustment mechanism in the present embodiment includes two bolt holes 28 each having a slit shape extending in an arc shape over a predetermined angle interval provided at a corresponding position of each subheader (25A, 25B), and the bolt holes. And a bolt member 29 that is screwed to the main header 22 so that the sub-headers (25A, 25B) can be released via the 28.

  The first sub-header 25A includes a first injection nozzle 27A1 and a second injection nozzle 27A2, and an injection flow that causes the internal flow path 24 of the main header 25 and both injection nozzles to communicate with each other over the entire rotation range of the sub-header. A path (26A1, 26A2) is formed. Similarly, the second sub header 25B includes a first injection nozzle 27B1 and a second injection nozzle 27B2, and allows the internal flow path 24 of the main header 25 and both injection nozzles to communicate with each other over the entire rotation range of the sub header. An injection flow path (26B1, 26B2) is formed.

  In both the first and second subheaders (25A, 25B), the first injection nozzle (27A1, 27B1) is the parallel injection type, and the second injection nozzle (27A2, 27B2) is the injection axis line of the rotation center axis. An inward injection type inclined to the main header side on a horizontal plane including In this embodiment, the inward inclination angle is 5 degrees. The interval between the injection nozzles of the first and second subheaders (25A, 25B) in the horizontal direction perpendicular to the central axis was set to 30 mm.

  The water jet injected from the inward injection type injection nozzle has an inverted conical shape that converges toward the extension line of the rotation center axis if the angle of inclination of the injection axis with respect to the rotation center axis by rotation of the subheader is 0 Thus, when viewed as a whole water jet nozzle, it is possible to counteract the diffusion of the water jet from the other jet nozzle and suppress the reduction in jet power. Therefore, in this embodiment, one injection nozzle is selected for each of the first and second subheaders (25A, 25B) for high-pressure water injection, but the first injection nozzle is a parallel injection type from one of the subheaders. And the inward injection type second injection nozzle is selected from the other subheader to obtain a combination of two types of water jets.

  In the present embodiment, both the first and second sub-headers (25A, 25B) have the first injection nozzle and the second injection nozzle on the vertical plane whose mutual injection axis direction includes the rotation center Y of the sub-header. It was assumed to extend in opposite directions along the diameter. Of the first and second injection nozzles, the other injection nozzle that is opposite to the one injection nozzle that is positioned forward for high-pressure water injection is set in a non-injectable state by a lid means or the like.

  Therefore, the first header and the second nozzle are selectively used as high-pressure water spray nozzles to be processed by the angle adjusting mechanism so that the spray direction is directed to the front side of the main header 22 and the sub-header is moved to the main header 22. When the position is fixed, both the first subheader 25A and the second subheader 25B can be attached to the left and right side surfaces of the main header 22, and the first injection nozzle and the second injection nozzle as nozzles for high-pressure water injection Can be selected from the subheader on either side. Therefore, the nozzle head 21 according to the present embodiment is set to obtain two different types of water jets. However, the degree of freedom in assembling is large, and an assembly error is unlikely to occur even with a simple design.

  In the second embodiment described above, the parallel injection type first injection nozzle and the inward injection type second injection nozzle are arranged along a diameter on a vertical plane in which the mutual injection axis directions include the rotation center Y of the subheader. However, as Example 3 of the present invention, the first injection nozzle and the second injection nozzle are provided close to each other and both nozzles can be utilized for high-pressure water injection. As shown in FIG. FIG. 5A is a schematic perspective view of the nozzle head, partially showing the inside in a transparent state, and FIG. 5B is a schematic transparent view seen from above.

  The nozzle head 31 according to the present embodiment has a configuration in which the main header and the angle adjustment mechanism other than the arrangement of the first and second injection nozzles and the injection flow paths are basically the same as those of the nozzle head 21 of the second embodiment. Is. That is, the nozzle head 31 mainly includes a main header 32 having a mounting portion 33 that is mounted on the rotating shaft 14 of the water jet gun 10, and left and right side surfaces of the main header 32 across the vertical surface X. Each includes a first sub-header 35A and a second sub-header 35B that are rotatably attached along the vertical plane X by an angle adjusting mechanism.

  The main header 32 is provided with an internal flow path 34 for circulating the ultrahigh pressure water supplied from the water jet gun 10 to each sub header (35A, 35B), and the internal flow path 34 is connected to the rotating shaft 14 of the mounting portion 33. At the same time as mounting, it is connected to the ultra high pressure water supply path on the water jet gun side. The angle adjustment mechanism in the present embodiment includes two bolt holes 38 each having a slit shape extending in an arc shape over a predetermined angle interval provided at a corresponding position of each subheader (35A, 35B), and the bolt holes. And a bolt member 39 that is screwed to the main header 32 so that the sub-headers (35A, 35B) can be released via a pin 38.

  The first sub-header 35A is configured such that a parallel injection type first injection nozzle 37A1 and an inward injection type second injection nozzle 37A2 extend on the vertical plane X from the sub-header rotation center Y in the injection direction. Are arranged so as to form an angle of 45 degrees with each other, and the injection passages (36A1, 36A1,. 36A2) is formed.

  Similarly, in the second subheader 35B, the first injection nozzle 37B1 and the second injection nozzle 37B2 have an angle of 45 degrees between the injection axes extending in the injection direction from the subheader rotation center Y on the vertical plane X. An injection flow path (36B1, 36B2) that connects the internal flow path 34 of the main header 32 and both injection nozzles over the entire rotation range of the sub header 35B is formed. Yes.

  With the above configuration, in the nozzle head 31 according to the present embodiment, since the first injection nozzle and the second injection nozzle in the same subheader are arranged close to each other, both the injection nozzles can be used for water jet injection, The removal capability can be remarkably enhanced by utilizing up to four injection nozzles in the first and second subheaders (35A, 35B).

1, 21, 31: Nozzle heads 2, 22, 32: Main headers 3, 23, 33: Mounting portions 4, 24, 34: Internal flow paths 5A, 25A, 35A: First subheaders 5B, 25B, 35B: First 2 sub-headers 6A, 6B, 26A1, 26A2, 26B1, 26B2, 36A1, 36A2, 36B1, 36B2: injection flow path 7A, 7B: injection nozzles 27A1, 27B1, 37A1, 37B1: first injection nozzles 27A2, 27B2, 37A2, 37B2: 2nd injection nozzle 8, 28, 38: Bolt hole 9, 29, 39: Bolt member 10: Water jet gun 11: Main body 12: Super high pressure hose connection port 13: Gun barrel part 14: Rotating shaft 15: Grip part 16 : Lever 17: Anti-vibration handle 18: Nozzle cover

Claims (7)

A water jet gun that is detachably attached to the rotary shaft at the tip of a water jet gun having an internal rotary shaft and jets ultra-high pressure water supplied from an external supply source via the water jet gun from an injection nozzle. In the mounting nozzle head,
A main header having a mounting portion with the rotating shaft, and an internal flow path for circulating ultra-high pressure water supplied from a water jet gun;
A jet nozzle for jetting the ultra-high pressure water, and is detachably attached to one of the left and right side surfaces of the main header in the initial setting state with the vertical plane including the rotation center axis of the rotary shaft interposed therebetween. 1 sub-header and a second sub-header detachably attached to the other of the left and right side surfaces ,
The first and second sub-headers can be rotated in a direction perpendicular to the rotation surface of the rotary shaft with respect to the main header in the initial setting state, and the rotation of the injection axis of the injection nozzle by the rotation. An angle adjustment mechanism for fixing an inclination angle along a vertical plane including the rotation center axis with respect to the center axis so as to be changeable to an arbitrary angle, and an internal flow path of the main header and an injection nozzle over the entire rotation range. An injection flow path that communicates , and
The first sub-header and the second sub-header are respectively parallel injection type first injection nozzles and injection axes that are parallel to the rotation center axis on a horizontal plane that includes the rotation center axis. An inward injection type second injection nozzle inclined to the main header side by a predetermined angle with respect to the rotation center axis on a horizontal plane including:
The angle adjustment mechanism selectively fixes the first and second injection nozzles as high-pressure water injection nozzles to the object to be processed and directs the injection direction toward the front side of the main header to fix the position of the sub header to the main header. A nozzle head for mounting a water jet gun. Wherein at the same sub-header first injection nozzle and the second injection nozzle is characterized in that along a diameter on the vertical plane to one another in the injection axis direction including the center of rotation of the sub-header extending in opposite directions The nozzle head for mounting a water jet gun according to claim 1 . The angle adjustment mechanism is configured such that the injection axis of the injection nozzle selected as the high-pressure water injection nozzle is within an elevation angle range of 0 to 45 degrees with respect to the rotation center axis or 0 to 45 degrees with respect to the rotation center axis. water jet gun mounting nozzle head according to claim 1, the subheader can be changed within the scope of the depression degree, characterized in that rotating and stationary in. The angle adjusting mechanism includes a bolt member for releasably fixing the sub header to the main header, and a bolt hole provided in the sub header,
The bolt hole has a slit shape extending in an arc shape over a predetermined angle interval, and the bolt member can be relatively moved in the slit-shaped bolt hole over the entire width region in the unlocked state. The nozzle head for mounting a water jet gun according to claim 3 . The first injection nozzle and the second injection nozzle in the same subheader are arranged such that mutual injection axes extending in the injection direction from the subheader rotation center form an angle of 45 degrees or less on a vertical plane including the rotation center axis. claim 1 water jet gun mounting nozzle head, characterized in that 2. The water jet according to claim 1 , wherein an interval between a spray nozzle of the first subheader and a spray nozzle of the second subheader along the horizontal direction orthogonal to the rotation axis is 20 to 30 mm. Gun mounting nozzle head. The inward injection type injection nozzle has an inward inclination angle toward the main header with respect to the rotation center axis on a horizontal plane including the rotation center axis of the injection axis is 5 degrees. Item 7. A nozzle head for mounting a water jet gun according to Item 6 .

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