JPS63145996A - Washer - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention (Industrial Application Field) This invention is applicable to, for example, a device that decontaminates tools, molded products, members, etc. whose surfaces are contaminated with radioactive substances at a nuclear power plant so that they can be reused. , relates to a device for cleaning various articles.

(Prior art) To decontaminate objects to be cleaned such as tools contaminated with radioactive substances, an abrasive material such as bead-shaped plastic or walnut shell particles is injected onto the surface of the object to be cleaned together with Freon to remove radioactive materials. It is preferable to remove the substance, and the applicant has proposed a decontamination device disclosed in Japanese Patent Application Laid-Open No. 60-205299 as an apparatus for this purpose.

(Problems to be Solved by the Invention) In the above decontamination device, the object to be cleaned is decontaminated by spraying abrasive material and Freon with a single spray gun placed opposite to the object to be cleaned. If the object to be cleaned is a relatively small item such as a tool, sufficient decontamination can be carried out by turning the object inside out or moving it up and down.

However, when the object to be cleaned is a pipe, it is extremely inefficient to decontaminate the pipe with one nozzle by lifting, lowering and rotating the pipe one by one. Furthermore, when the object to be cleaned is a large object such as a scaffolding board, it is difficult to turn the object inside out due to space limitations, so nozzles are installed on both the front and back sides of the object to be cleaned. It is conceivable to perform decontamination by scanning the ejected fluid by moving it vertically and horizontally. However, in this case, although the front or back surface of the object to be cleaned perpendicular to the jetting direction of the fluid jetted from the nozzle can be sufficiently decontaminated, the side surfaces and end surfaces parallel to the jetting direction may not be fully decontaminated. There is a risk that this may occur.

This invention solves the above-mentioned problems, and aims to provide a cleaning device that can efficiently and reliably clean each side of an object to be cleaned.

(Means for Solving the Problems) However, in the cleaning device of the present invention, the object to be cleaned and the nozzle opening toward the object to be cleaned are connected in the Y-axis direction extending in the longitudinal direction of the object to be cleaned, and in the Y-axis direction extending in the longitudinal direction of the object to be cleaned. In a cleaning device that cleans the object to be cleaned by scanning the fluid ejected from the nozzle by relative movement in the X-axis direction perpendicular to the a second nozzle having an axis tilted with respect to the Z axis and the Y axis; and a second nozzle having an axis tilted with respect to the Z axis and Y@ and different from the axis of the second nozzle. This cleaning device is characterized in that a combination nozzle consisting of a third nozzle is provided facing each other with the object to be cleaned sandwiched therebetween.

In this invention, the axis of the first nozzle is parallel to the Z axis (Z
axial direction), the ejected fluid collides perpendicularly with the front part of the workpiece parallel to the X-Y plane, resulting in an excellent cleaning effect, which is preferable. It may be tilted to some degree.

Further, in this invention, if the angle formed by the axes of the second nozzle and the third nozzle and the Z axis is 45 degrees, the X-
It is preferable because the ejected fluid from the second nozzle and the third nozzle can collide obliquely with the side surface perpendicular to the Y plane, and furthermore, the axes of these nozzles are located on a plane that intersects the Y axis at an angle of 45 degrees. By doing so, the fluid ejected from these nozzles can obliquely impinge on the side and end surfaces parallel to the Y-axis and the X-axis, making it particularly suitable for cleaning long objects extending in the Y-axis direction. be.

(Function) In the cleaning device of the present invention, the surface to be cleaned parallel to the X-Y plane is cleaned by the first nozzle that jets cleaning fluid almost perpendicularly to the surface to be cleaned, and the surface to be cleaned from an oblique direction. Cleaning is performed by second and third nozzles that eject fluid. Further, the side surfaces (including the inner wall surface) and end surfaces of the object to be cleaned that are perpendicular to the front surface are cleaned by the second and third nozzles that spray the cleaning fluid obliquely onto these surfaces. According to the inventor's experiments, the cleaning effect is highest when spraying from a direction of 90 degrees (perpendicular) to the surface to be cleaned, but it is also recommended to tilt the axis of the spray at an angle of about 40 to 45 degrees with respect to the surface to be cleaned. It has been found that a considerable cleaning effect can be obtained even if Even if the object to be cleaned has a cleaning surface that is inclined in various directions, such as a tubular shape rather than a rectangular parallelepiped, three wooden nozzles with different axial directions (first
to the third nozzle), each part is reliably cleaned. In addition, these three nozzles are placed facing each other on both sides of the object to be cleaned, so the object to be cleaned is efficiently cleaned from both sides, eliminating the need to turn the object inside out. can be small and simple in structure.

(Example) A practical example of the present invention will be described below with reference to FIGS. 1 to 6.

In the figure, 1 is a decontamination room surrounded by a cover plate all around.
The tray 3 is loaded into the decontamination chamber 1 by opening the front door 2. The tray 3 is made up of several crosspieces 5 fixed to an outer frame 4, on which vibrators, which are objects to be cleaned, are horizontally arranged side by side. A horizontal guide rail 7 facing in the X-axis direction perpendicular to the Y-axis extending in the longitudinal direction of this vibro is fixed in the decontamination chamber 1, and a support supported on this guide rail 7 so as to be movable in the X-axis direction. Platform 8
．． 8 supports both ends of the tray 3.

Reference numeral 9 denotes a drive device that intermittently drives the abutment 8 in the X-axis direction, and the abutment 8.8 is driven by a chain through an intermediate shaft 12 extending in the Y-axis direction by a reduction gear 11 driven by a motor 1o. be. On the other hand, reference numeral 14 denotes a reciprocating stand for supporting the nozzle, which is made up of two cross-shaped support frames 15 connected by an upper beam 16 and a lower beam 17, and a guide rail 18 extending in the Y-axis direction fixed to the decontamination v1. .18 in a horizontally reciprocating manner.

Reference numeral 19 denotes a drive device for reciprocating the carriage 14 in the Y-axis direction, and the carriage 14 is driven by a chain by a reduction gear 21 driven by a motor 20. An upper nozzle (combined nozzle) 22 and a lower nozzle (combined nozzle) 23 are attached to the bottom of each support frame 15 so as to face each other with the tray 3 sandwiched therebetween from both upper and lower sides. As shown in FIGS. 3 to 6, the upper nozzle 22 has a base plate 24a formed by bending a steel plate, and a first nozzle 26a having an axis 25a extending in the Z-axis direction perpendicular to the X-axis and the Y-axis, and a Z-axis. A second nozzle 28a and a third nozzle 30a are attached having axes IIJ27a, 29a inclined with respect to the axis. Second
Nozzle axis! 27a and the axis 29a of the third nozzle,
Both have a twisted relationship with respect to the axis 25a of the first nozzle, and as shown in FIG. 6 Axes 27a and 29a as shown
The angle β formed by the axis 25a (therefore, the two axes) is 45 degrees. In addition, each component of the lower nozzle 23 has a positional relationship that is obtained by rotating the upper nozzle 22 by 180 degrees around the Y-axis, so each corresponding part is shown with a reference numeral, and a detailed explanation will be omitted. .

Incidentally, an abrasive material made of fluorocarbon and bead-shaped plastic is supplied to each nozzle by a hose (not shown), and the mixture of fluorocarbon and abrasive material is ejected as a jetting fluid.

In the decontamination device 33 configured as described above, after the tray 3 carrying the vibrocontaminated with radioactive substances is set in the position shown in the figure, the upper nozzle 22 and the lower nozzle 23 integrated with the carriage 14 are operated by the filtration device 19. The tray 3 is driven in the Y-axis stopping direction, and when the end of the drive is reached, the tray 3 is moved by a small amount in the X-axis direction (for example, by the radius of the vibro) by the drive device 9, and then each nozzle is driven in the Y-axis angular direction, and the same operation follows. Repeat this to scan the tray 3 with the fluid ejected from each nozzle to decontaminate the vibro. At this time, the upper and lower surfaces and the inclined surface portion 34 of the vibro are connected to the first nozzle 26
(general term for 26a and 26b; hereinafter the same applies to other members) and the second nozzle 28 or third nozzle 30 effectively decontaminates the side surface 35 and end surface 36. It is effectively decontaminated by the second nozzle 28 or the third nozzle 30 that sprays the fluid from the inclined direction.

In addition, as shown in Figure 7, a shallow box-shaped scaffold board (object to be cleaned)
When decontaminating item 37, place scaffolding board 37 on tray 3.
If the same operation as above is carried out with the scaffold board 37 placed, the outer surface 38, the inner surface 39, and the not-shown end surfaces (outer and inner surfaces) of the scaffolding board 37 will all be exposed to the second nozzle 28 or the third nozzle 3.
0 effectively decontaminates.

FIG. 8 shows an embodiment of the present invention, in which the third nozzle 30
are provided on the same left and right sides as the second nozzle 28 with respect to the Y axis, and the axis 27 of the second nozzle and the axis 29 of the third nozzle are parallel to the axis 25 with an intersection angle α of 45 degrees with the Y axis. The only difference from the previous embodiment is that the second embodiment is located within planes 40 and 41 that are orthogonal to each other, and the same effects as those of the previous embodiment can be obtained.

The present invention is not limited to the above-mentioned embodiments, but may be arranged such that the entire nozzle is rotated by a predetermined angle around two axes, as shown in FIGS. 9 and 10, for example.

Further, the angles α and β formed by each nozzle with the Y axis and Z axis may be other than those described above. In addition, in the above embodiment, the combination nozzle consisting of the first to third nozzles was provided facing each other with the object to be cleaned sandwiched between the upper and lower sides, but depending on the shape of the object to be cleaned and the scanning direction, They may be provided facing each other so as to be sandwiched in the left and right direction or in the inclination direction.

Note that the axes of the first nozzles on both sides do not necessarily have to be arranged in a straight line. Furthermore, in the above embodiment, two pairs of the combination nozzles are provided at positions spaced apart in the Y-axis direction, which is particularly convenient for cleaning long objects to be cleaned. It is sufficient to simply provide a pair.

Although the decontamination apparatus has been described above, the present invention is applicable to a wide variety of cleaning apparatuses, such as degreasing mechanical parts using cleaning liquid.

(Effects of the Invention) As explained above, according to the present invention, a combination nozzle consisting of the first to third nozzles having different axial directions is provided facing each other across the object to be cleaned, and the object to be cleaned is cleaned by scanning. Since cleaning is performed, each surface of the object to be cleaned can be efficiently and reliably cleaned.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional view of a decontamination device showing an embodiment of the present invention, Fig. 2 is a sectional view taken along line A-A in Fig. 1, Fig. 3 is an enlarged view of part B in Fig. The figure is a plan view of the nozzle part in Figure 3, Figure 5 is a schematic diagram of Figure 4, Figure 6 is a partial sectional view taken along line C-C in Figure 4, and Figure 7 is another set of objects to be cleaned. FIG. 8 is a diagram equivalent to FIG. 3 showing the state, FIG. 8 is a diagram equivalent to FIG. 5 showing another embodiment of this invention, and FIGS. 9 and 10 are equivalent to FIG. It is a diagram. 3...Tray, 6...Pipe (object to be cleaned), 7...
・Guide rail, 8... Abutment, 9... Drive device, 1
4... Reciprocating stand, 18... Guide rail, 19...
Drive device, 22... Upper nozzle (combination nozzle), 2
3... Lower nozzle (combination nozzle), 24a, 24b
...Base plate, 25a125b-...Axis line, 2
6a, 26b...first nozzle, 27a, 27b-
... Axis line, 28a, 28b - ... Second nozzle, 29a,
29b... Axis line, 30a, 30 b... Third nozzle, 31a, 31b... Plane, 32a, 32b...
Plane, 33... Decontamination device, 37... Scaffolding board (object to be cleaned), 40a, 40b... Plane, 418141b...
·Plane.

Claims (1)

[Scope of Claims] 1. An object to be cleaned and a nozzle opening toward the object to be cleaned are moved relative to each other in a Y-axis direction extending in the longitudinal direction of the object to be cleaned and an X-axis direction perpendicular thereto, In the cleaning device that cleans the object to be cleaned by scanning the fluid ejected from the nozzle, a first nozzle having an axis substantially parallel to the Z axis perpendicular to the X axis and the Y axis; A combination nozzle consisting of a second nozzle having an axis inclined with respect to the axis, and a third nozzle having an axis inclined with respect to the Z axis and the Y axis and different from the axis of the second nozzle. A cleaning device characterized in that the cleaning device is installed facing each other with the object to be cleaned sandwiched therebetween. 2. The cleaning device according to claim 1, wherein the angle formed by each axis of the second nozzle and the third nozzle and the Z axis is 45 degrees. 3. Cleaning according to claim 1 or 2, wherein the axes of the second nozzle and the third nozzle lie on two mutually parallel planes that are parallel to the Z-axis and intersect with the Y-axis at an angle of 45 degrees. Device. 4. Cleaning according to claim 1 or 2, wherein the axes of the second nozzle and the third nozzle lie on two mutually orthogonal planes that are parallel to the Z-axis and intersect with the Y-axis at an angle of 45 degrees. Device.