JPH0760137B2 - Cleaning equipment for penetrant inspection - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cleaning device for cleaning an object to be inspected by penetrating treatment with a penetrant to remove excess penetrant, and particularly to a penetrant containing no surfactant. The present invention relates to a cleaning device suitable for use in a penetrant flaw detection method of cleaning with water.

[0002]

2. Description of the Related Art Penetrant inspection methods are roughly classified into fluorescent penetrant inspection methods and dye penetrant inspection methods. In either case, the penetrant contains a water immiscible solvent and a fluorescent or colored dye. In the method of washing with water after the permeation treatment, the penetrant contains a surfactant in advance, and therefore the penetrant is self-emulsified and removed during the washing with water. Alternatively, after the permeation treatment, a step of applying a surfactant to the test object is added, followed by washing with water (called a post-emulsification method). There is also a method of washing with a solvent. The washing method is often used from the viewpoint of process simplicity, application range and workability.

In recent years, from the viewpoint of environmental pollution prevention and economical efficiency, a closed system has been considered in which after-use cleaning water (containing permeate) is recovered, separated into water and permeate, and reused. . However, it is difficult to separate water / permeate in a water washing method or a post-emulsification method using a surfactant, a coagulant is used, and a large capacity tank is required.

A washing method without using a surfactant has also been proposed. That is, high-pressure injection of water vapor (Japanese Patent Publication No. 56-
37501), or by shaking in water or spraying water with appropriate water pressure (JP-A-55-55244). Since the wash water after use in these methods does not contain a surfactant, the water / permeate separation is relatively easy. However, since the surfactant is not present, it is not always easy to uniformly and effectively clean the entire test object.

[0005]

The present invention is suitable for water cleaning in permeation flaw detection, especially for water cleaning without using a surfactant as described above, and the entire object to be inspected can be uniformly and effectively in a short time. It is an object of the present invention to provide a device capable of automatically cleaning and removing accumulated water corresponding to a concave portion on the surface.

[0006]

SUMMARY OF THE INVENTION The present invention is a device for cleaning an inspected object after permeation treatment with an osmotic liquid in penetrant flaw detection to remove an excess osmotic liquid. Table, drive unit that rotates the turntable, power transmission system that connects the turntable and the drive unit,
A device comprising a spray nozzle group provided above, laterally and downwardly of an object to be inspected, and a box surrounding the turntable and the spray nozzle, the lower spray nozzle having a large number of openings. The power transmission system is arranged below the turntable so that the washing water from the lower spray nozzle can pass through the turntable upward and the turntable is rotatably supported by means provided near the outer periphery of the lower surface of the turntable. Is a cleaning device comprising a meshing means in the vicinity of the outer periphery of the turntable and a drive shaft meshing with the meshing means and connected to the drive section.

The present invention will be described below with reference to the drawings.

In FIG. 1, the object to be inspected (1) is placed on a turntable (2). The object to be inspected (1) may be placed in a net-like basket or the like and placed on the turntable (2).

The turntable (2) is preferably a dolly
It is placed on top of (3) and, as shown in FIG. 3, is provided with four carriage rollers (21) under the carriage. You can enter and leave the box (4) together with the trolley (3).

Therefore, at least one side surface of the box body (4) is provided with a vertical opening door (23) fitted with a meshed glass (22), and a dolly can be put in and out of the door, and the dolly is placed outside the vertical opening door. Prepare a stand (24). With the dolly out, place the object to be inspected on the turntable, put each dolly into the box manually or by motor / chain drive, and then fix the dolly.

The central flat portion of the turntable (2) has a large number of openings, for example, a drainboard shape, a grid shape, or a mesh shape, through which the washing water from the lower spray nozzle is uniformly covered. It is jetted on the lower surface of the inspection object.

A meshing means (5) such as a roller chain or a gear is provided on the upper surface or lower surface near the outer circumference of the turntable (2), or preferably on the outer circumference.

As shown in FIG. 4, the turntable (2) is
It is rotatably supported in the horizontal direction by means provided in the vicinity of the outer periphery of the lower surface thereof, for example, a plurality of rollers (6). Further, the outer circumference of the guide roller (25) is regulated by a plurality of guide rollers (25) so as not to be eccentric during rotation.

The drive part (7) is outside the box (4), preferably above or below, especially above and near the outer circumference of the box. From there, penetrate the box and the drive shaft (14) is the turntable.
It extends in the vicinity of the outer periphery of (2) and meshes with the meshing means (5).
Preferably, the tip of the drive shaft is supported by a thrust bearing, and the sprocket wheel provided in the middle of the shaft meshes with the meshing means (5). The turntable (2) is preferably rotated at 4 to 12 times / minute, and cleaning for about 1 minute is sufficient.

As described above, the turntable (2) is provided with a large number of openings, the turntable (2) is rotatable, and the drive shaft and the power transmission system are provided in the lower center of the turntable (2). However, since the cleaning water spray does not hit the drive shaft by providing the cleaning water near the outer periphery, the cleaning water is uniformly applied to the lower surface of the inspection object.

A spray nozzle (8) is provided under the turntable (2). The number of spray nozzles can be appropriately selected according to the size of the device, and is, for example, 3 to 7.

Preferably, the plurality of spray nozzles are connected to a single conduit and are arranged in the radial direction thereof under the turntable (2) so that the conduits can be swung, for example, 30 degrees in the circumferential direction. To be done. For this purpose, the tip of the conduit is thrust-bearing, and the other end is connected to a swing drive section (for example, an air cylinder driven cam mechanism) (25).

On the other hand, 3 to 7 spray nozzles (9) are provided above the inside of the box (4). The plurality of spray nozzles (9) are connected to a single conduit, and the arrangement of the spray nozzles (9) is taken in the direction not disturbed by the drive shaft and in the radial direction of the turntable (2). In FIG. 1, the spray nozzles (9) are arranged in the front-back direction of the drawing, that is, in the left-right direction of FIG. The spray nozzle (9) can be moved up and down, so that the distance to the inspected object can be appropriately set according to the height of the inspected object. For this purpose, the spray nozzle conduit or its support is connected to the rack jack (10) provided above the box (4) and this is moved up and down by a motor or manually.

Further, for example, 3 to 7 spray nozzles (11) are provided in a row in the vertical direction on the inner side of the box (4). It is preferable to vertically reciprocate the spray nozzle (11) so that the side surface of the inspection object can be uniformly washed from the upper end to the lower end. To this end, the conduit or support of the spray nozzle is attached to the air cylinder (12) and the step movement is controlled up and down in, for example, 3 to 6 steps. Further, as shown in FIG. 2, the air cylinder (12) can be adjusted so that the lateral distance between the spray nozzle (11) and the inspection object can be adjusted.
Is attached to a slide type substrate (13) provided on the ceiling of the box (4), and the substrate (13) is slid by power or manually.

The above spray nozzles (8), (9) and (1
1) is, for example, a fan-shaped spray nozzle, each of which is provided with a ball valve and a universal joint. All these nozzles are shared for the injection of wash water and the subsequent injection of a drying gas such as air. Therefore, these are switchably connected to both the cleaning liquid supply source and the pressurized air supply source. For example, the opening / closing control of the nozzle is performed automatically by a fan rotary valve for washing water and a solenoid valve for pressurized air, and a check valve is installed in the middle of the pipe. The above three groups of spray nozzles (8), (9) and (11) can be used for injection at the same time or with a time lag.

Preferably, each nozzle is about 10-30
kg / cm ^2, preferably, it can be injected about 2～5L / min of washing water at a pressure of 15~20kg / cm ^2.

The angle of the spray pattern is preferably about 45 degrees, and the spray pressure is 10 to 30 kg /
cm ^2, and especially about 15~20kg / cm ^2. In water washing in the conventional method using a penetrant containing a surfactant, the pressure of water spray is generally ² to 3 kg / cm ^2, and the higher pressure causes excessive washing.

After the washing, the washing water is collected in the lower pan, exits from the drain pipe (15), and is led to the oil-water separator.

The size of the device of the present invention is not particularly limited, but for example, the box (4) has a width, depth and height of 5 mm.
0 to 200 cm, diameter of turntable (2) is 30 to 17
It can be 0 cm.

Since the apparatus of the present invention has the above-mentioned structure, it is possible to automatically perform cleaning under program control according to the size and shape of the member to be cleaned, and in a short time there is no excess or deficiency. Moderate cleaning can be achieved.

As described above, the present invention provides a cleaning apparatus which is useful for penetrant inspection without the use of a surfactant, particularly fluorescent penetrant inspection.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of the device of the present invention.

2 is a cross-sectional view of the device of FIG. 1 as viewed from the left side.

FIG. 3 is a plan view of a turntable.

FIG. 4 is a cross-sectional view of a turntable outer peripheral portion.

[Explanation of symbols]

 1 inspected object 2 turntable 3 bogie 4 roller box 5 roller chain 6 support roller 7 drive unit 8 lower spray nozzle 9 upper spray nozzle 10 rack jack 11 side nozzle 12 air cylinder 13 substrate 14 drive shaft 15 drain pipe 21 truck roller 22 Wired glass 23 Door 24 Cart stand 25 Swing drive

Claims (3)

[Claims] 1. A device for cleaning an inspected object after permeation treatment with an osmotic liquid in an osmotic flaw detection to remove an excessive osmotic liquid, a turntable for mounting the inspected object, and a drive for rotating a turntable. Unit, a power transmission system connecting the turntable and the drive unit, a spray nozzle group that is provided above, laterally and below the object to be inspected, and a box body surrounding the turntable and the spray nozzle. The lower spray nozzle is arranged below the turntable having a large number of openings, so that washing water from the lower spray nozzle can pass upward through the turntable, and the turntable is provided near the outer periphery of the lower surface. The power transmission system is rotatably supported by means provided with a meshing means near the outer periphery of the turntable and the meshing hand. A cleaning device comprising a drive shaft which meshes with the step and is connected to the drive. 2. The cleaning apparatus according to claim 1, further comprising means for connecting the spray nozzle group to both the cleaning water supply source and the pressurized gas supply source in a freely switchable manner. 3. A roller chain or gear provided near the outer circumference of the turntable, wherein the drive section is above or below the box and near the outer circumference thereof, and the drive shaft extends through the outer circumference of the box near the outer circumference of the turntable. The cleaning device according to claim 1 or 2, which meshes with the cleaning device.