WO1983003781A1 - Method and device for injecting high pressure water for facility or the like on roadside - Google Patents

Abstract

A device for injecting a high pressure water stream of uniform pressure to clean the surface of the wall of a tunnel, which supplies high pressure water via a high pressure water guide pipe (4), injects the water from a nozzle (1) having an elliptical hole (2), supplies compressed air via a guide pipe (5), discharges the air through a passage (7') between the first pipe (8) of hollow rectangular section and the second pipe (9) of hollow rectangular section disposed therein, simultaneously discharges the air via the passage (6') of the second pipe (9), and joins part of the air stream of the passage (7') through an air passage hole (9') to the air stream of the passage (6'). Thus, the injected water stream is discharged as a laminated fluid surrounded by a plurality of air stream layers to obtain a water pressure pattern of uniform pressure on the surface to be cleaned, thereby efficiently cleaning the wall. This device can be utilized for a painting, a removing solvent, etc.

Description

 Akira glue Title of the invention

 High-pressure water spraying method and equipment for roadside facilities, etc.

 Application to the surface of the spray body, spray device Background of the invention

 The present invention relates to efficient cleaning of industrial facilities and member surfaces, especially highway water flow for finishing road cleaning with extremely high efficiency while moving a spraying tool on a tunnel wall, for example, a roadside facility in the field of road construction. Regarding injection method and equipment.

 In more detail, the high-pressure jet water flow particles are suppressed by the compressed air flow released from the rectangular cross section through the equipment mounted on the traveling vehicle, and this fluid is surrounded by another air flow. According to the injection method for obtaining a water pressure pattern that is narrow in the horizontal (X-axis) direction of the surface to be cleaned and elongated in the vertical direction, and is equalized in pressure. Is

 Conventionally, most nozzle devices intended for cleaning use either a pattern such as an elliptical shape, a circular shape, or an annular shape depending on the shape and size of the hole of the nozzle itself, regardless of the supply water pressure. Radiating.

 For example: The elliptical pattern in Fig. 5 shows the pressure distribution at the collision surface, as can be seen in Fig. 7, even when the nozzle angle is variable.

OMPI In the figure, the central part is the highest, and the peripheral part is compressed and becomes lower as the distance from the axis 0 increases. .

 Therefore, such a known distribution pattern can be regarded simply as a hill-like map of isobars, and as a result, pressure unevenness occurs in the Y-axis direction of the collision surface, resulting in a desired cleaning result. In order to achieve this, extra nozzle movement is repeated, or inefficiencies and uneconomics such as mounting multiple nozzles on the device are accepted. Disclosure of the invention

 The present invention mainly relates to a method for cleaning road facilities and equipment therefor, wherein a cylindrical drum comprising an outer air chamber and an inner air chamber constituting the equipment comprises two air-radiating pipes and this concentric pipe. It is combined with two compressed air passages formed by pipes.

The high-pressure jet water from the nozzle hole communicating with each of the above-mentioned portions and acting simultaneously, and the compressed air flow by the two layers, are obtained by mixing the jetted water particles with the above-mentioned air particles under certain restrictions. A layered fluid having a uniform pressure as in a double envelope is produced and administered to allow a desired rod-shaped pressure distribution to occur on the surface to be washed. Industrial applicability

 According to the method of the present invention, the particles forming the high-pressure water flow are surrounded by an air flow having two layers, which are equivalent in relative velocity and in terms of particle mechanics, and are sprayed in a uniform manner. Administer an L-shaped and ¾ιτ jet stream.

 Such high pressure water radiation which repeats and provides the same effect is available and essential in the field of the invention. BRIEF DESCRIPTION OF THE FIGURES

Fig. 1 is a perspective view of the device for carrying out the method of the present invention, Pig. 2 is a cross-sectional configuration and operation diagram in the plane of the device, and Fig. 3 is a cross-sectional configuration and operation diagram in the side surface of the device. , Tig. 4 is the action data according to the embodiment of the present invention, FIG. 6 is a diagram of the water pressure distribution pattern obtained in FIG. 4, and FIG. 5, FIG. 7, FIG. Refers to a known hydraulic pattern _c . Best mode for carrying out the present invention (Detailed Description of the Invention)

 The present invention relates to efficient cleaning of industrial facilities and member surfaces, and in particular to high-pressure cleaning for extremely efficient cleaning of roadside facilities in the field of road construction, for example, by moving a spray device to a tunnel wall surface. The present invention relates to a method and apparatus for jetting water.

 The inventor previously provided a hollow pipe surrounding the nozzle as means for forcing an ultra-high pressure water stream ′ from a small-hole nozzle to strongly collide with the air flow exceeding the jetted water velocity in the pipe. A device for mixing with water flow was proposed.

The injection method according to the present invention can not be solved by the above-mentioned proposal. It is an added concept that has been reached after repeating a number of tests to obtain a reasonable hydraulic pattern, i.e. both the direction of movement of the nozzle, the X-axis, and the line 垂直, which is perpendicular to it. In addition, the objective of the subject was achieved by enabling the rod-shaped mist flow (Fig. 6) extending vertically (Y-axis) under constant pressure to be constantly cleaned on the surface to be cleaned.

 Hereinafter, the method of the present invention will be described together with the configuration of the nozzle device.

 FIG. 1 is a perspective view with a cross section of the device I according to the present invention, and FIG. 2 is a longitudinal sectional view of the device I and an explanatory view of the action.

 The device I is composed of a first pipe 8 with a rectangular cross section that forms the appearance, and a hollow inside

The second pipe 9 has a rectangular cross-section and is formed with passages 7 'and 6', respectively, through which the air flow (i'ig.3) from the compressed air inlet 5 passes. ing. The device I also has a cylindrical drum air chamber disposed at the rear, and the walls of the two pipes 8, 9 communicate with this air chamber. The Li air chamber is composed of a first air chamber 7 formed at the end of the drum and a second air chamber 6 provided inside the drum, and the air flow described above is passed through the air communication port 10. Part of A (Fig. 3) is allowed to flow into the chamber 7 described above.

Next, (2, a nozzle 1 having an elliptical hole 2 within a small 1% is disposed in the vicinity where the second air chamber of the drum and the second pipe 9 are connected. The center of such a drum A high-pressure water introduction pipe 4 is fitted to the shaft, and a distal end of the pipe 4 is connected to a base 3 that projects into the drum and supports the nozzle 1. In this case, since the base 3 is screwed to the screw portion 12, the nozzle 1 is positioned to be able to slightly expand and contract forward.

 In order to obtain the J1 type and rod-shaped jet pressure cover pattern, which is the object of the present invention, the instrument I has a front jet angle of 12.5 ° to 15 °. Within, the lateral angle << is approximately fixed 2. The above-mentioned air flow pipes 8 and 9 having a rectangular cross section are opened forward while maintaining at least the illustrated angle of 7 °. Approximately 7, when compressed air is emitted into the atmosphere. This is because it can be calculated that the process proceeds while spreading. The external appearance of the above-mentioned device I is as follows. In this example (a rectangular cross section of 65% × 15% in the second case), the device was made compact with a depth of 90%, and assembled via left and right flanges 11 and 11.

 In order to implement the method of the present invention, the device I was configured as described above, and the operation in this case will be described below with reference to FIGS.

 In this example, the working distance between the wall of the large tunnel (Implementation site, Otsuki Tunnel in Japan, 499, height 7) and the working distance of the appliance I was extremely close to each other by regular means. The distance of the implementation was reduced to 550% to 100% range.

 Now, the instrument I was operated via an engine, a high-pressure pump (not shown) mounted on the vehicle, and an air compressor.

At this time, the high-pressure water is set at 50 and is fed to the nozzle 1 from the introduction pipe 4, and the jet water flow w ₂ is radiated forward from the elliptical hole 2 (0.8%) of the nozzle as shown by the dotted line in the figure.

At the same time, the compressed air flow A from the introduction pipes 5, 5 to the Subi one de equivalent of the injection water flow w ₂ 8K ^ / _C ^, the majority of the velocity under a and A flow amount a! Is From the circumferential side of the first air chamber 7 of the drum, its first passage 7 '

_ΟΜΡΙ. Is forcibly released.

Or by UNA air flow rate, the not to speed higher than that of the water flow, energy Cum injection injection water flow w ₂ particles in the friction action that includes a peripheral outside air is produced by atomization .. ", the reduction of the formic one For the need to prevent:

Now, part a ₂ remaining the air flow A passes through the second air chamber 6 of the drum, and flows out to the front second pipes 9 inside the air passage 6 of the '. At this time, the above-described air flow a: in the passage 7 ′ is diverted to the inner passage 6 ′ through a plurality of air passage holes 9 ′, 9 ′ drilled in the wall of the pipe 9 and inclined downward. and which, therefore the each of the particles of the jet w ₂ the force - will form the academic on, Ichiso intends constrained mixed flow in the direction of the longitudinal axis of the passage 6 '.

In other words, the (w ₂ + a ₂ ) group of energetic particles in the second pipe 9 having a rectangular cross section is further radiated in a forcible manner by being surrounded by a layer of external flow and radiated in a forced manner. It becomes possible to obtain a pressure pattern.

 When the distribution pattern on the surface to be washed was measured in the above operation, the a-carg in FIG. 4 was obtained.

 Tunnel in-house operation such as 100% to 550% distance from appliance I • "A curve is also long in the Y-axis direction according to the logic on the surface to be cleaned, even if the work interval changes. While showing a short axis width of 5απ, 4 cm, and 3 cm on the X-axis, irregular curves are exhibited in each of these cases.

 However, it is clear that this is equivalent to the logic force a shown in the left margin of Fig.2, Pig.3 (equal pressure and narrow smooth distribution).

OMPI However, if the method of the present invention was not carried out, the following effect was caused due to the difference in distribution with the pattern b (dotted kag in Fig. 4) occurring on the surface to be cleaned. The implementation of the method of the invention allows the jet stream to administer the above-mentioned pressure pattern a, so that the working efficiency can be stably increased, and another advantage is that the particles of the jet stream do not naturally disperse in mist. Therefore, the operation loss and the effect of the present invention are not limited to the above-described embodiment.

の範囲に おいて、 器具 Iの有する複数のヱァ一通過孔 9' ， 9'の設定数と径ぉ よび、 その穿設角度を、 もしく は空気流通路の開口角度と噴射距離 の相互関係を、 所望に遂一選択すれば、 目的ごとの噴射水流 w ₂ を、 質的に制御ないし調整できる て "あ 。 In each experiment including application in other fields such as painting work, removal of adherent solvent, etc., the high pressure water was 100 to な い し, Ι Οθ

The number and diameter of the plurality of through holes 9 ', 9' of the device I, and the drilling angle, or the mutual relationship between the opening angle of the air flow passage and the injection distance in the range of the relationship, if desired in遂Ichi selection, the injection water flow w ₂ for each purpose, it can be qualitatively controlled or adjusted "Oh.

_OMPI WIPO

Claims

 The scope of the claims Inner In the injection action of one high-pressure water, a water stream having a limited injection angle, the speed and concentric laminar S airflow a _t, 3 '. The cause. Was emitted, the particles of the water jet streams w ₂ Injection method in which the constrained jet is confined at the same time as above, and the jet particles in a mode in which the confined jet is surrounded by the external air flow a, are administered to the surface to be cleaned. 2 In the high-pressure water injection operation, the generated gas-liquid particle flow (w: + a ₂ ) is passed through an air passage inside the outside air passage having a hollow rectangular cross section. —The injection method of item 1 in which an injection pattern of uniform pressure is formed on the surface to be cleaned, which is narrow in the X-axis direction and extends in the vertical direction of the Y-axis when injected at the same speed as the flow a. 3 Injection method ο, characterized in that in the injection method of the preceding paragraphs 2 and 1, the relationship between the distance of the surface to be cleaned and the opening angle of the air flow passages 0 ', is variably allowed.  4 In the high-pressure water injection device, the air chamber of the concentric cylindrical drum composed of the first and second chambers and the concentric radiation pipes 8 and 9 of air having a hollow rectangular cross section are connected to the air chamber. It has two layers of rectangular compressed air passages ', 1' integrally formed on the front surface of the drum and a high-pressure water inlet and a nozzle hole 2 provided so as to penetrate the axis of the drum forward. And the water flow angle that can be sprayed from the nozzle hole 2 is controlled to 12.5 ° to 15 ° in the Y-axis direction. OMPI [Enter TPO Injection instrument of the items 1 to 3, wherein the method implemented formed by limit ₀ 5 With a hollow rectangular cross section, the inner radiant air flow a ₂ and the jet water flow The ^two pie blanking wall Oite, downwardly inclined air passage holes in the ² or more, for the ^fourth term high-pressure water injection to Toku徵by comprising an instrument o forming a passageway  OMPI