JP2011125805A - Nozzle for rotary gun - Google Patents
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- JP2011125805A JP2011125805A JP2009287645A JP2009287645A JP2011125805A JP 2011125805 A JP2011125805 A JP 2011125805A JP 2009287645 A JP2009287645 A JP 2009287645A JP 2009287645 A JP2009287645 A JP 2009287645A JP 2011125805 A JP2011125805 A JP 2011125805A
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Abstract
Description
本発明は、ウォータージェットを処理対象物に扇形状に噴射して塗膜剥離、目荒し、はつり、洗浄、アスベスト除去などの処理作業を行う時に使用するロータリーガン用ノズルに関するものである。 The present invention relates to a nozzle for a rotary gun that is used when processing operations such as coating film peeling, roughening, hanging, washing, and asbestos removal by spraying a water jet into a processing object in a fan shape.
従来から、建設・土木分野などにおいてウォータージェットを用いる処理作業は広く行われている。例えば、古くなった建築構造物の外装塗膜面が長い年月の経過により、汚れたり、膨れたり、ヒビ割れなどが生じて改修工事をするための塗膜剥離をする時、あるいはコンクリート面にタイルを貼る際に、タイルの付着をよくするために下地に微細な凹凸をつけるための目荒らしをする時、さらには劣化したコンクリートをはつり落とす時、または天井や壁に吹き付けられたアスベストを除去する時などには、ウォータージェットを被処理面に噴射して、そのウォータージェットの持つエネルギーにより、タイル下地の目荒らし、はつり、アスベスト除去作業などを行っている。 Conventionally, processing operations using a water jet have been widely performed in the construction and civil engineering fields. For example, when the exterior paint film surface of an old building structure becomes dirty, swollen, cracked, etc. due to the passage of time, the paint film is peeled off for repair work, or on the concrete surface When applying tiles, when roughing the surface to make fine irregularities in order to improve the adhesion of the tiles, or when removing degraded concrete, or removing asbestos blown to the ceiling or walls For example, when a water jet is sprayed onto the surface to be treated, the tile base is roughened, suspended, or asbestos removed by the energy of the water jet.
上記のような処理作業で使用されるウォータージェットノズルとしては、単一の噴射ノズルを用いるより、複数の噴射ノズルを用いる方が処理速度の点において優れることから複数の噴射ノズルが使用されている。例えば、ノズルヘッドの中心部に1個、その外周部に60度の間隔毎に6個、計7個からなるノズルを装着したマルチノズルヘッドを、ロータリーガンの先端部に取り付けて回転させて7個のノズルからウォータージェット噴出して処理作業を行うことが知られている(例えば、特許文献1参照)。 As the water jet nozzle used in the above-described processing operation, a plurality of injection nozzles are used because it is better in terms of processing speed to use a plurality of injection nozzles than to use a single injection nozzle. . For example, a multi-nozzle head equipped with a total of seven nozzles, one at the center of the nozzle head and six at 60 ° intervals on the outer periphery, is attached to the tip of the rotary gun and rotated to 7 It is known that water jets are ejected from individual nozzles to perform a processing operation (see, for example, Patent Document 1).
しかしながら、上記の特許文献1の場合、マルチノズルヘッドが回転することによって、ウォータージェットも回転軸周りを回転する。これによって、ウォータージェットは、被処理対象物上で円を描くように噴射される。その状態でウォータージェットを、処理対象物の表面に対して略平行に横方向へ移動することによって処理するのであるが、この時、早く移動させると処理面にムラが出来てしまう。そのために低速で移動させなくてはならず、作業効率が低下してしまうという問題点があった。 However, in the case of the above-mentioned Patent Document 1, the water nozzle also rotates around the rotation axis when the multi-nozzle head rotates. Thereby, the water jet is jetted so as to draw a circle on the object to be processed. In this state, the water jet is processed by moving in the lateral direction substantially parallel to the surface of the object to be processed. At this time, if the water jet is moved quickly, the processing surface becomes uneven. Therefore, it has to be moved at a low speed, and there is a problem that work efficiency is lowered.
また、上記特許文献1のような複数のノズルチップを装着したマルチノズルヘッドの場合は、図5に示すように、ウォータージェットの移動軌跡が筋Bとなって処理面に残るばかりでなく、先行軌跡と後行軌跡の交差部の軌跡Cが深くなり、その交差部の軌跡Cが処理面に残ると共に、ウォータージェットの先行軌跡と後行軌跡により生じる僅かな間隙Dの部分が噴射されず塗膜面が残るという問題点があった。 Further, in the case of a multi-nozzle head equipped with a plurality of nozzle chips as in the above-mentioned patent document 1, as shown in FIG. The trajectory C of the intersection of the trajectory and the subsequent trajectory becomes deeper, the trajectory C of the intersection remains on the processing surface, and a portion of the slight gap D generated by the preceding trajectory and the subsequent trajectory of the water jet is not injected. There was a problem that the film surface remained.
本発明は、上記のような問題点を解決することを課題として開発されたもので、複数個の平射ノズルを備えたノズルを回転させながらウォータージェットを噴射して移動軌跡を筋として残すことがなく、単位時間あたりの処理面積が広くなり、処理作業時間を短縮化できるロータリーガン用ノズルを提供する。 The present invention was developed with the object of solving the above-described problems. A water jet is ejected while rotating a nozzle having a plurality of flat spray nozzles to leave a moving locus as a streak. There is provided a nozzle for a rotary gun that can increase the processing area per unit time and shorten the processing time.
上記の課題を解決し、その目的を達成する手段として、本発明は、ロータリーガン用ノズル主体の先端面に、ウォータージェットを扇形状に噴出する複数個の平射ノズルを設けると共に、該平射ノズルは回転中心線に対して、回転方向に傾斜する傾斜角で配置されていることを特徴とするロータリーガン用ノズルを開発し、採用した。 As means for solving the above-described problems and achieving the object, the present invention provides a plurality of flat nozzles for jetting water jets in a fan shape on the front end surface of the rotary gun nozzle main body. Developed and adopted a nozzle for a rotary gun characterized by being arranged at an inclination angle inclined in the rotation direction with respect to the rotation center line.
上記のように構成した平射ノズルの傾斜角は、10〜25度の範囲内であることを特徴とするロータリーガン用ノズル、および複数個の平射ノズルは、同一の円周上位置で、中心点に対して、対称位置に配置されていることを特徴とするロータリーガン用ノズルを開発し、採用した。 The angle of inclination of the spray nozzle configured as described above is in the range of 10 to 25 degrees, and the nozzle for the rotary gun and the plurality of spray nozzles are at the same point on the circumference. In contrast, we developed and adopted a nozzle for a rotary gun, which is characterized by being arranged in a symmetrical position.
本発明に係るロータリーガン用ノズルによれば、複数個の平射ノズルが回転中心線に対して、回転方向に傾斜する角度で配置されているから、ウォータージェットが被処理面に当るのに角度がつき被処理面への食い込み効果が上がると共に、扇形状に噴射されるので軌跡がつくことがない。また、複数個の平射ノズルにより噴射幅が広くなり単位時間当りの処理作業をむらなく広くすることができる。さらに、扇形状に噴射するウォータージェットは向きを変えながら噴射する多方向からの噴射になり、塗膜剥離、目荒し、はつり、洗浄、アスベスト除去など複雑な形状の処理作業にも十分な効果を発揮する。 According to the rotary gun nozzle of the present invention, since the plurality of spray nozzles are arranged at an angle inclined in the rotation direction with respect to the rotation center line, the angle at which the water jet hits the surface to be processed is set. In addition to increasing the effect of biting into the surface to be processed, the fan is sprayed in a fan shape so that no locus is created. Further, the spray width is widened by the plurality of flat spray nozzles, and the processing work per unit time can be uniformly widened. Furthermore, the water jet sprayed in a fan shape is sprayed from multiple directions while changing the direction, and it is sufficient for processing work with complicated shapes such as coating film peeling, roughening, lashing, washing, and asbestos removal. Demonstrate.
以下に、本発明の実施の形態を説明すれば、1はノズル主体であり基部に多角形状の鍔体2を有し、その鍔体2の正面中央部にノズル柱体3を突出形成してあり、そのノズル柱体3の先端面のノズルヘッド4にウォータージェットを扇形状に噴出する2個の平射ノズル5,5が同一の円周上の位置で、かつ中心点Oに対して上下対称位置に配置されている。 In the following, an embodiment of the present invention will be described. Reference numeral 1 denotes a nozzle main body having a polygonal housing 2 at the base, and a nozzle column 3 protruding from the front center of the housing 2. There are two flat spray nozzles 5 and 5 for ejecting a water jet in a fan shape on the nozzle head 4 on the tip surface of the nozzle column 3 at the same circumferential position and symmetrical with respect to the center point O. Placed in position.
この平射ノズル5,5は、図2に示すように、回転中心線Aに対して回転方向に傾斜する傾斜角θ1,θ2の傾斜角で捩られている。この傾斜角θ1,θ2は10〜25度が好適である。傾斜角θ1,θ2が10度以下になると、従来のノズルの噴射と効果が変わらず、25度以上になると、水流が拡散してしまい処理作業が殆どできないことから適さず15度が最適である。 As shown in FIG. 2, the flat spray nozzles 5 and 5 are twisted at inclination angles θ 1 and θ 2 that are inclined with respect to the rotation center line A in the rotation direction. The inclination angles θ 1 and θ 2 are preferably 10 to 25 degrees. When the inclination angles θ 1 and θ 2 are 10 degrees or less, the effect is the same as the conventional nozzle injection, and when it is 25 degrees or more, the water flow diffuses and the processing operation is hardly possible, so 15 degrees is not suitable. It is.
ノズルヘッド4の平射ノズル5,5が取り付けられている取着面は、相反する方向に傾斜する傾斜面6,6に形成されていると共に、外周面の上面部と下面部を水平面7,7に、両側面部を垂直面8,8に削成して軽量化してあり、水平面7,7と垂直面8,8の間を弧状面9,9、9,9に形成して略八角形状に形成されている。 The attachment surface to which the flat nozzles 5 and 5 of the nozzle head 4 are attached is formed on inclined surfaces 6 and 6 that are inclined in opposite directions, and the upper surface and the lower surface of the outer peripheral surface are horizontal surfaces 7 and 7. In addition, both sides are cut into vertical surfaces 8 and 8 to reduce the weight, and between the horizontal surfaces 7 and 7 and the vertical surfaces 8 and 8 are formed into arcuate surfaces 9, 9, 9, and have a substantially octagonal shape. Is formed.
ノズル柱体3の内部には、平射ノズル5,5に連通する傾斜水路10,10が穿設されており、その傾斜水路10,10の下端部は鍔体2の内部に穿設された水平水路11に連通し、さらにその水平水路11と連結連通する導水孔13が鍔体2の背面側中央部の回転軸14に一体的に設けられている。 In the nozzle column 3, inclined water channels 10, 10 communicating with the spray nozzles 5, 5 are drilled, and the lower ends of the inclined water channels 10, 10 are horizontal holes drilled in the housing 2. A water guide hole 13 that communicates with the water channel 11 and that communicates with the horizontal water channel 11 is provided integrally with the rotary shaft 14 at the center of the rear side of the housing 2.
このように構成した実施の形態におけるロータリーガン用ノズルの使用例を作用、効果と共に説明すれば、ノズル主体1をロータリーガン(図示せず)の先に装着して、被処理面に向かって噴射すれば、ノズル主体1が回転し、平射ノズル5,5からウォータージェットが重ならないよう広角に扇形状に噴射され、輻射幅が広くなり単位時間の当りの処理作業面積が広くなる。また、平射ノズル5,5が回転方向に傾斜する傾斜角で配置されているから、回転にともなって扇形状の向きを変えながら被処理面に対して噴射することになり、処理作業に対して多方向からの噴射になり、ボルト周りなどの凸凹部の複雑な部分であっても充分に噴射水が届き処理作業ができる。また、被処理面への食い込み効果が上がり、塗膜剥離、目荒らし、はつり、アスベスト除去などの作業効率が向上する。 Explaining the usage example of the rotary gun nozzle in the embodiment configured as described above together with the operation and effect, the nozzle main body 1 is mounted on the tip of the rotary gun (not shown) and sprayed toward the surface to be processed. Then, the nozzle main body 1 is rotated, and the water jets are sprayed in a wide angle from the flat nozzles 5 and 5 so as not to overlap each other, the radiation width is widened, and the processing work area per unit time is widened. Further, since the spray nozzles 5 and 5 are arranged at an inclination angle inclined in the rotation direction, the fan is sprayed onto the surface to be processed while changing the direction of the fan shape with the rotation. The spraying is performed from multiple directions, and even the complicated portion of the convex and concave portions such as around the bolt can sufficiently receive the spray water and perform the processing operation. In addition, the effect of biting into the surface to be treated is improved, and the work efficiency such as peeling of the coating film, roughening of the surface, hanging and asbestos removal is improved.
(実施例1)
以下に、本発明の具体的実施例を説明する。
圧力180MPa、水量9リットル/分、ノズル口径0.45mm、噴出角度15度で上下対称位置に配された2個の平射ノズル21、21を用いて、処理面との間隔3〜10cmの条件下で、図6に示すように、縦、横方向に突起部22a、22bを板面につけた縞鋼板22からなる階段の踏板、縦0.24m×横0.8mにアルキッドフタル酸塗料が塗布された塗膜面の剥離作業を行った。ウォータージェットの軌跡は図6に示すように、縦、横の突起部22a、22bの略全面に噴射されることになり、塗膜面積0.192m2を剥離するのに1回目は17分48秒で全面剥離できた。2回目は16分04秒で全面剥離できた。平均の剥離時間は16分76秒であった。
Example 1
Hereinafter, specific examples of the present invention will be described.
Using two spray nozzles 21 and 21 arranged in a vertically symmetrical position with a pressure of 180 MPa, a water volume of 9 liters / minute, a nozzle diameter of 0.45 mm, and an ejection angle of 15 degrees, a condition of a distance of 3 to 10 cm from the processing surface Then, as shown in FIG. 6, an alkyd phthalic acid paint is applied to a stair tread made of a striped steel plate 22 with protrusions 22a, 22b on the plate surface in the vertical and horizontal directions, 0.24 m long by 0.8 m wide. The coating surface was peeled off. As shown in FIG. 6, the trajectory of the water jet is sprayed on substantially the entire surface of the vertical and horizontal protrusions 22a and 22b, and the first time to peel the coating film area of 0.192 m 2 is 17 minutes 48 minutes. The entire surface was peeled in seconds. The second time, the entire surface was peeled off at 16 minutes 04 seconds. The average peel time was 16 minutes 76 seconds.
(比較例1)
圧力200MPa、水量11.8リットル/分、ノズル口径が直径0.5mm、直射2孔回転ノズル31を用いて、被処理面との間隔3〜10cmの条件下で、図7に示すように、縦、横方向に突起部32a、32bを板面につけた縞鋼板32からなる階段の踏板、縦0.24m×横0,8mにアルキッドフタル酸塗料が塗布された塗膜面の剥離作業を行った。ウォータージェットの軌跡は図7に示すように、縦、横の突起部32a、32bの一部に噴射されるだけであり、全面剥離するのに1回目は49分39秒かかり、2回目は53分54秒かかった。
(Comparative Example 1)
As shown in FIG. 7 under the conditions of a pressure of 200 MPa, a water amount of 11.8 liters / minute, a nozzle diameter of 0.5 mm, and a direct-irradiation two-hole rotating nozzle 31 with a distance of 3 to 10 cm from the surface to be processed. Stripping of stair tread made of striped steel plate 32 with protrusions 32a, 32b on the plate surface in the vertical and horizontal directions, and coating film surface coated with alkyd phthalic acid paint on vertical 0.24m x horizontal 0,8m It was. As shown in FIG. 7, the trajectory of the water jet is only sprayed to a part of the vertical and horizontal protrusions 32a and 32b, and it takes 49 minutes and 39 seconds for the first time to peel off the entire surface, and 53 for the second time. It took 54 minutes.
(実施例2)
圧力180MPa、水量9リットル/分、ノズル口径0.45mm、噴出角度15度で上下対称位置に配された2個の平射ノズルを用いて、処理面との間隔3〜10cmの条件下で、リブラスに断熱材(アスベスト仕様)を吹き付けた試験体、縦1.4m×横1m、厚さ30mmの除去試験をしたところ、面積1.4m2を除去するのに1回目は1分19秒で100%除去でき、2回目は48秒で100%除去でき、平均の除去時間は1分04秒であった。
(Example 2)
Using two flat spray nozzles arranged in a vertically symmetrical position with a pressure of 180 MPa, a water volume of 9 liters / minute, a nozzle diameter of 0.45 mm, and an ejection angle of 15 degrees, A test piece sprayed with a heat insulating material (asbestos specification), a removal test of 1.4 m in length × 1 m in width and 30 mm in thickness, the first time to remove an area of 1.4 m 2 was 100 minutes in 1 minute 19 seconds %, The second time was 100% in 48 seconds, and the average removal time was 1 minute 04 seconds.
(比較例2)
圧力200MPa、水量1.79リットル/分、ノズル口径が直径0.2mm、直射2孔回転ノズル((株)スギノマシン社製)を用いて、被処理面との間隔3〜10cmの条件下で、前記実施例2と同じリブラスに断熱材(アスベスト仕様)を吹き付けた試験体、縦0.7m×横1m、厚さ30mmの除去試験をしたところ、面積0.7m2 除去するのに1回目は4分11秒で略除去でき、2回目は4分24秒で略除去でき、平均の除去時間は4分18秒であった。
(Comparative Example 2)
Using a pressure of 200 MPa, a water volume of 1.79 liters / minute, a nozzle diameter of 0.2 mm, and a direct-split two-hole rotating nozzle (manufactured by Sugino Machine Co., Ltd.) under conditions of a distance of 3 to 10 cm from the surface to be processed , example 2 and the heat insulating material in the same Riburasu test body blowing (asbestos specification), vertical 0.7 m × horizontal 1 m, was the removal test thickness 30 mm, 1-time to be the area 0.7 m 2 removal Was approximately removed at 4 minutes and 11 seconds, the second time was approximately removed at 4 minutes and 24 seconds, and the average removal time was 4 minutes and 18 seconds.
(実施例3)
圧力180MPa、水量9リットル/分、ノズル口径0.45mm、噴出角度15度で上下対称位置に配された2個の平射ノズルを用いて、処理面との間隔3〜10cmの条件下で、リブラスに断熱材(アスベスト仕様)を吹き付けた試験体、縦0.6m×横1m、厚さ40mmの除去試験をしたところ、面積0.6m2 除去するのに1回目は1分08秒で100%除去でき、2回目は53秒で100%除去でき、平均の除去時間は1分01秒であった。
(Example 3)
Using two flat spray nozzles arranged in a vertically symmetrical position with a pressure of 180 MPa, a water volume of 9 liters / minute, a nozzle diameter of 0.45 mm, and an ejection angle of 15 degrees, A test piece sprayed with heat insulating material (asbestos specification), 0.6 m long × 1 m wide, 40 mm thick removal test was conducted, and the first time to remove 0.6 m 2 area was 100% in 1 minute 08 seconds The second removal was 100% in 53 seconds, and the average removal time was 1 minute 01 seconds.
(比較例3)
圧力200MPa、ノズル口径が直径0.2mm、水量2.67リットル/分、直射3孔回転ノズル((株)スギノマシン社製)を用いて、被処理面との間隔3〜10cmの条件下で、前記実施例3と同じリブラスに断熱材(アスベスト仕様)を吹き付けた試験体、縦0.7m×横1m、厚さ30mmの除去試験をしたところ、面積0.7m2 除去するのに1回目は4分26秒で略除去でき、2回目は3分31秒で略除去でき、平均の除去時間は3分59秒であった。
(Comparative Example 3)
Using a pressure of 200 MPa, a nozzle diameter of 0.2 mm, a water volume of 2.67 liters / minute, and a direct-irradiation 3-hole rotating nozzle (manufactured by Sugino Machine Co., Ltd.) under conditions of a distance of 3 to 10 cm from the surface to be processed , example 3 and the heat insulating material in the same Riburasu (asbestos specification) were sprayed with the test body, vertical 0.7 m × horizontal 1 m, was the removal test thickness 30 mm, 1-time to be the area 0.7 m 2 removal Was approximately removed at 4 minutes and 26 seconds, the second time was approximately removed at 3 minutes and 31 seconds, and the average removal time was 3 minutes and 59 seconds.
以上、本発明の実施の形態では、処理作業を縞鋼板の塗膜剥離と断熱材アスベスト仕様の除去作業で説明したが、必ずしもこれに限るものではなく、目荒し、はつり、洗浄など本発明の目的を達成でき、かつ本発明の要旨を逸脱しない範囲内において種々の設計変更が可能であることは言うまでもない。 As described above, in the embodiment of the present invention, the processing operation has been described with the stripping of the striped steel plate and the removal operation of the asbestos specification of the heat insulating material, but the present invention is not necessarily limited to this. Needless to say, various design changes can be made without departing from the scope of the present invention.
本発明は、扇形状のウォータージェットを被処理対象物に噴射して、剥離、洗浄、はつり、目荒し、アスベスト除去処理作業など広い範囲にわたって有効に利用することができる。 INDUSTRIAL APPLICABILITY The present invention can be effectively used over a wide range of operations such as peeling, cleaning, suspending, roughing, asbestos removal processing work by spraying a fan-shaped water jet onto an object to be processed.
1 ノズル主体
3 ノズル柱体
4 ノズルヘッド
5 平射ノズル
θ1 傾斜角
θ2 傾斜角
DESCRIPTION OF SYMBOLS 1 Nozzle main body 3 Nozzle column body 4 Nozzle head 5 Flat spray nozzle (theta) 1 inclination angle (theta) 2 inclination angle
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JP2009287645A JP5634058B2 (en) | 2009-12-18 | 2009-12-18 | Nozzle for rotary gun |
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JP2009287645A JP5634058B2 (en) | 2009-12-18 | 2009-12-18 | Nozzle for rotary gun |
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JP5634058B2 JP5634058B2 (en) | 2014-12-03 |
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Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2011173064A (en) * | 2010-02-24 | 2011-09-08 | Sugino Machine Ltd | Nozzle head for mounting water jet gun |
JP5276209B1 (en) * | 2012-06-22 | 2013-08-28 | 株式会社プラーナ | Method for peeling and removing hard polyurethane foam insulation layer |
CN104014438A (en) * | 2013-02-28 | 2014-09-03 | 株式会社Ksk | Nozzle device |
US9345630B2 (en) | 2011-11-08 | 2016-05-24 | Delta Tooling Co., Ltd. | Upper frame position holding structure and ambulance vibration-proof rack having upper frame position holding structure |
US9630192B2 (en) | 2013-08-23 | 2017-04-25 | Ksk Co. Ltd. | Nozzle device |
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JPH06226215A (en) * | 1993-01-29 | 1994-08-16 | Nisshin Kogyo Kk | Method and device for washing/removing object surface |
JPH0760333A (en) * | 1993-08-23 | 1995-03-07 | Hans-Juergen Gaydoul | Descaling means of hot-rolled steel sheet |
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Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
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JPH06226215A (en) * | 1993-01-29 | 1994-08-16 | Nisshin Kogyo Kk | Method and device for washing/removing object surface |
JPH0760333A (en) * | 1993-08-23 | 1995-03-07 | Hans-Juergen Gaydoul | Descaling means of hot-rolled steel sheet |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2011173064A (en) * | 2010-02-24 | 2011-09-08 | Sugino Machine Ltd | Nozzle head for mounting water jet gun |
US9345630B2 (en) | 2011-11-08 | 2016-05-24 | Delta Tooling Co., Ltd. | Upper frame position holding structure and ambulance vibration-proof rack having upper frame position holding structure |
JP5276209B1 (en) * | 2012-06-22 | 2013-08-28 | 株式会社プラーナ | Method for peeling and removing hard polyurethane foam insulation layer |
CN104014438A (en) * | 2013-02-28 | 2014-09-03 | 株式会社Ksk | Nozzle device |
CN104014438B (en) * | 2013-02-28 | 2016-07-06 | 株式会社Ksk | Spray nozzle device |
US9630192B2 (en) | 2013-08-23 | 2017-04-25 | Ksk Co. Ltd. | Nozzle device |
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