JPH04285846A - Cleaning apparatus for detection of flaw using penetrant - Google Patents

Abstract

PURPOSE:To uniformly and automatically cleans the whole of a to-be-inspected object effectively by providing a lower spray nozzle below a turn table having a plurality of openings, thereby allowing a cleaning water from the lower spray nozzle to pass through the turn table above the nozzle. CONSTITUTION:An object 1 to be inspected is placed on a turn table 2. A flat part at the center of the table 2 has many openings, through which a cleaning water from a lower spray nozzle 8 is uniformly jetted out to the lower face of the object. A meshing means 5 is provided in the upper or lower face in the vicinity of the outer periphery of the turn table 2, more preferably, in the outer periphery of the turn table 2. The table 2 is supported in a rotatable manner in the horizontal direction by some means provided in the vicinity of the outer periphery of the lower face thereof, for example, a plurality of rollers 6. A driving part 7 is outside a box 4. Specifically, a driving shaft 14 of the driving part 7 passes through the box 4 in the vicinity of the outer periphery of the box 4 and extends to the vicinity of the outer periphery of the table 2, where the shaft is meshed with the means 5.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention relates to a cleaning device for cleaning an object to be inspected and removing excess penetrant after penetrant treatment with a penetrant in penetrant testing, and in particular, relates to a cleaning device that cleans a test object after penetrant treatment with a penetrant and removes excess penetrant. The present invention relates to a cleaning device suitable for performing a penetrant flaw detection method using water and cleaning with water.

0002

2. Description of the Related Art Penetrant testing methods are broadly classified into fluorescent penetrant testing and dye penetrant testing. In either case, the penetrating liquid includes a water-immiscible solvent and a fluorescent or colored dye. In the method of washing with water after the infiltration treatment, the infiltration liquid contains a surfactant in advance, and therefore, during washing with water, the infiltration liquid self-emulsifies and is removed. Alternatively, after the penetration treatment, a step of applying a surfactant to the test object is added, followed by washing with water (referred to as a post-emulsification method). There is also a method of cleaning using a solvent. The water washing method is often used because of its simplicity, range of application, and workability.

[0003] In recent years, from the viewpoints of environmental pollution prevention and economic efficiency, a closed system has been considered in which used cleaning water (contaminated with permeate) is recovered, separated into water and permeate, and reused. . However, in the washing method or post-emulsification method using a surfactant, it is difficult to separate water/penetrating liquid, and a flocculant is used and a large-capacity tank is required.

[0004] A water washing method that does not use a surfactant has also been proposed. In other words, water vapor is injected at high pressure (Special Publication Act, 1982-
37501), or shake it in water or spray it with water at an appropriate pressure (Japanese Patent Laid-Open No. 55-55244). Since the washing water after use in these methods does not contain a surfactant, separation of water/permeate is relatively easy. However, since there is no surfactant, it is not always easy to uniformly and effectively clean the entire object to be inspected.

[0005]

[Problems to be Solved by the Invention] The present invention is suitable for water cleaning in penetrant testing, especially water cleaning without the use of surfactants as described above, and is capable of uniformly and effectively cleaning the entire object to be inspected in a short period of time. It is an object of the present invention to provide a device capable of automatically cleaning and removing accumulated water in concave portions of the surface.

[0006]

[Means for Solving the Problems] The present invention provides an apparatus for cleaning an object to be inspected after penetrating treatment with a penetrating liquid in penetrant testing and removing excess penetrant. A drive unit that rotates the table, a turntable, a power transmission system that connects the turntable and the drive unit,
A device consisting of a group of spray nozzles arranged facing above, on the sides, and below the object to be inspected, and a box surrounding the turntable and the spray nozzles, the lower spray nozzle having a large number of openings. The power transmission system is arranged below the turntable, so that cleaning water from the lower spray nozzle can pass upward through the turntable, and the turntable is rotatably supported by means provided near the outer periphery of the lower surface of the turntable. This is a cleaning device consisting of an engaging means located near the outer periphery of a turntable and a drive shaft that engages with the engaging means and is connected to a drive section.

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

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

[0009] The turntable (2) is preferably placed on a carriage (3), under which four carriage rollers (21) are provided as shown in FIG. The trolley (3) can be accessed through the box (4).

[0010] Therefore, at least one side of the box (4) is provided with a vertical opening door (22) fitted with wired glass (22).
23) from which the trolley can enter and exit, and a trolley mount (24) is prepared outside the vertical opening door. The object to be inspected is placed on a turntable with the cart extended, and each cart is placed into a box manually or driven by a motor/chain, and then the cart is fixed.

The central flat part of the turntable (2) has a number of openings, for example slat-like, grid-like or net-like, through which the cleaning water from the spray nozzles below is evenly covered. It is sprayed onto the bottom surface of the object to be inspected.

[0012] On the upper or lower surface near the outer periphery of the turntable (2), or preferably on the outer periphery, a meshing means (5) such as a roller chain or a gear is provided.

Turntable (2) as shown in FIG.
is horizontally rotatably supported by means provided near the outer periphery of its lower surface, such as a plurality of rollers (6). Further, its outer periphery is regulated by a plurality of guide rollers (25) to prevent eccentricity during rotation.

[0014] The driving part (7) is located outside the box (4), preferably above or below, particularly near the outer periphery of the box at the top. From there, the drive shaft (14) extends through the box to near the outer periphery of the turntable (2), and the engagement means (
5) mesh with. Preferably, the tip of the drive shaft is supported by a thrust bearing, and is engaged with the engagement means (5) by a sprocket foil provided in the middle of the shaft. The turntable (2) preferably rotates at a rate of 4 to 12 times per minute, and cleaning for about 1 minute is sufficient.

As mentioned above, the turntable (2) is provided with a large number of openings, the turntable (2) is made rotatable, and the drive shaft and power transmission system are provided at the center of the bottom of the turntable (2). Since the cleaning water spray is provided near the outer periphery without hitting the drive shaft, the cleaning water is uniformly applied to the lower surface of the object to be inspected.

A spray nozzle (8) is provided below the turntable (2). The number of spray nozzles is
It can be selected as appropriate depending on the size of the device, for example, 3
~7 pieces.

Preferably, the plurality of spray nozzles are connected to a single conduit and arranged in its radial direction below the turntable (2), the conduit being able to pivot in its circumferential direction by, for example, 30 degrees. be done. For this purpose, the tip of the conduit is thrust-bearing, and the other end is connected to a swing drive (for example, a cam mechanism driven by an air cylinder) (25).

On the other hand, three to seven spray nozzles (9), for example, are provided inside and above the box (4). A plurality of spray nozzles (9) are connected to one conduit,
The spray nozzles (9) are arranged in the radial direction of the turntable (2) in a direction that is not obstructed by the drive shaft. In Figure 1, the spray nozzle (9) is located in the front and back direction of the figure.
That is, they are arranged in the left and right direction in FIG. The spray nozzle (9) can be moved up and down, so that the distance between the spray nozzle and the object to be inspected can be set appropriately according to the height of the object to be inspected. For this purpose, the spray nozzle conduit or its support is mounted on a rack jack (10
), which can be raised and lowered by a motor or manually.

Further, spray nozzles (11), for example, 3 to 7 spray nozzles (11) are provided on the inner side of the box (4), arranged in a line in the vertical direction. It is preferable to reciprocate the spray nozzle (11) up and down so that the side surface of the object to be inspected can be cleaned uniformly from the upper end to the lower end. For this purpose, connect the conduit or support of the spray nozzle to an air cylinder (12
) and control the vertical movement in steps of, for example, 3 to 6 steps. In addition, as shown in Figure 2, a spray nozzle (
11) so that the lateral distance between the object and the object to be inspected can be adjusted.
The air cylinder (12) is attached to a sliding board (13) provided on the ceiling of the box (4), and
) can be slid by power or manually.

[0020] The above-mentioned spray nozzles (8) and (9)
and (11) are, for example, fan-shaped spray nozzles, each of which is provided with a ball valve and a universal joint. All these nozzles are shared for the injection of cleaning water and the subsequent injection of 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 and closing of the nozzle is automatically controlled by a fan rotary valve for cleaning water and a solenoid valve for pressurized air, and a check valve is installed in the middle of the piping. The above three groups of spray nozzles (8), (9) and (1)
1) can be used for injection simultaneously or with a time difference.

Preferably, each nozzle has about 10 to 30
kg/cm2, preferably 15-20 kg/cm2
Washing water can be sprayed at a rate of approximately 2 to 5 liters/minute at a pressure of .

[0022] Also, the angle of the spray pattern is preferably about 45 degrees, and the spray pressure is 10 to 30 kg.
/cm2, especially about 15-20 kg/cm2. In addition, in water cleaning in the conventional method using a surfactant-containing penetrating liquid, the pressure of the water spray is generally 2 to 2.
3 kg/cm2, and higher pressures resulted in excessive cleaning.

[0023] After washing, the wash water is collected in the lower pan, exits from the drain pipe (15), and is led to the oil-water separator.

[0024] The dimensions of the device of the present invention are not particularly limited, but for example, the box (4) has a width, depth, and height of 50 to 200 cm, and the turntable (2) has a diameter of 3 cm.
It can be from 0 to 170 cm.

[0025] Since the apparatus of the present invention has the above-described configuration, it is possible to perform cleaning automatically by program control according to the size and shape of the member to be cleaned, and to clean the parts in a short time without excess or deficiency. Appropriate cleaning can be achieved.

As described above, the present invention provides a cleaning device useful in penetrant testing without using a surfactant, particularly in fluorescent penetrant testing.

[Brief explanation of the drawing]

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

FIG. 2 is a sectional view from the left side of the device of FIG. 1;

FIG. 3 is a plan view of the turntable.

FIG. 4 is a sectional view of the outer periphery of the turntable.

[Explanation of symbols] 1 Object to be inspected 2 Turntable 3 Trolley 4 Box 5 Roller chain 6 Support roller 7 Drive section 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 Bogie roller 22 Wired glass 23 Door 24 Bogie mount 25 Swing drive part

Claims (3)

[Claims] 1. In a device for cleaning an object to be inspected after penetrant treatment with a penetrant in penetrant testing to remove excess penetrant, a turntable for placing an object to be inspected;
A drive unit that rotates the turntable, a power transmission system that connects the turntable and the drive unit, a group of spray nozzles provided above, on the sides, and below the object to be inspected, and surrounding the turntable and spray nozzles. The lower spray nozzle is arranged below the turntable having a number of openings, so that the cleaning water from the lower spray nozzle can pass upward through the turntable, and the turntable is The power transmission system is rotatably supported by a means provided near the outer periphery of the turntable, and the power transmission system includes an engaging means provided near the outer periphery of the turntable, and a drive shaft that meshes with the engaging means and is connected to a drive section. cleaning equipment. 2. The cleaning device according to claim 1, further comprising means for switchably connecting said spray nozzle group to both a cleaning water supply source and a pressurized gas supply source. 3. A drive unit is located above or below the box and near the outer periphery, the drive shaft extends near the outer periphery of the turntable through the outer periphery of the box, and a roller chain or gear is provided near the outer periphery of the turntable. The cleaning device according to claim 1 or 2, wherein the cleaning device is in mesh with the cleaning device.