KR20180043628A - Apparatus of removing magnetic foreign-material - Google Patents

Abstract

An apparatus for removing magnetic foreign materials from an outer wall of a probe for inspecting a pipe includes a frame, a motor, a rotary tub, at least one demagnetizing unit, and a rotary joint. The at least one demagnetizing unit is coupled to the rotary tub inside the rotary tub to be rotated, demagnetizes the magnetic foreign materials by touching the outer wall of the probe for inspecting a pipe, and collects a surfactant solvent while supplying the surfactant solvent to the outer wall of the probe for inspecting a pipe. In the rotary joint, a first rotary part coupled to a shaft of the motor, a fixing part coupled to the frame, and a second rotary part coupled to the rotary tub are successively coupled. Accordingly, the present invention can effectively remove the magnetic foreign materials.

Description

[0001] Apparatus of removing magnetic foreign-material [0002]

Field of the Invention [0002] The present invention relates to a magnetic foreign matter removing device, and more particularly, to a device for removing magnetic foreign substances attached to an outer wall of a probe for inspection of a pipe.

Further, the present invention is derived from a research carried out as part of the advanced nondestructive inspection technology development project.

[Task No .: 1711032055, Title: Development of sensor signal processing technology for practical use of bobbin type and cylinder type magnetic camera]

Small diameter piping, such as a heat transfer tube, conveys thermal energy by flowing a hot fluid or gas into or out of a thin metal wall.

If such small diameter piping is corroded or worn, the small diameter piping can maintain its thickness to some extent and can be used up to the next inspection cycle. However, if cracked defects such as fatigue-cracks are generated in small-diameter piping, maintenance such as replacement should be performed as soon as they are found. Accordingly, the piping inspection system identifies the corrosion, wear, and cracks of the piping and performs a quantitative evaluation.

In most cases, these small-diameter piping are bundled, making it difficult to access and inspect small-diameter piping from the outside. Therefore, by inserting the pipe inspection probe into the small-diameter pipe, the inner wall condition of the small-diameter pipe can be inspected.

As an example of a probe for piping inspection, there is an eddy-current type non-destructive probe using a bobbin type coil and a magnetic sensor array. In the eddy current type non-destructive test, in the case of the ferromagnetic pipe, the permeability of the pipe is high, and eddy currents are hard to permeate. Therefore, the inspection is carried out after the pipe becomes a self-saturated state by using the pipe inspection probe. This method is called partial saturation eddy current type nondestructive inspection.

In such a partially saturated eddy current type non-destructive inspection, there is a problem in that when the magnetic foreign matter adheres to the outer wall of the probe for inspection of the pipe, the pipe can not be sufficiently magnetized. In this case, the accuracy of the qualitative and quantitative analysis on the piping defects becomes poor.

For reference, in the case of a partially saturated eddy current type non-destructive inspection probe, the magnetic foreign substances attached to the outer wall due to the magnets therein become relatively large.

The problem of the background art is that the inventor holds it for the derivation of the present invention or acquires it from the derivation process of the present invention and is not necessarily known to the general public before the application of the present invention.

Korean Patent Registration No. 1111896 (Applicant: Chosun University Industry-Academic Cooperation Group, Name of invention: Piping inspection apparatus)

An embodiment of the present invention is to provide an apparatus capable of effectively removing magnetic foreign substances attached to the outer wall of a probe for inspection of a pipe.

According to an aspect of the present invention, there is provided an apparatus for removing magnetic foreign substances attached to an outer wall of a probe for inspecting a pipe, the apparatus including a frame, a motor, a rotary cylinder, at least one demagnetizer, and a rotary joint.

A water bath of surfactant solvent is formed in the frame.

Wherein the at least one demineralizer is coupled to the rotary cylinder at the inside of the rotary cylinder and rotated to come in contact with the outer wall of the probe for inspection of the pipe to demagnetize the magnetic foreign substances and to transfer the surfactant solvent to the outer wall of the pipe inspection probe Collect it while feeding.

In the rotary joint, a first rotating portion fastened to the shaft of the motor, a fixed portion fastened to the frame, and a second rotating portion fastened to the rotating barrel are coupled in order.

Here, hoses for supplying or discharging the surfactant solvent are connected between the fixed portion of the rotary joint and the water tub, and are connected between the second rotary portion of the rotary joint and the demagnetizer.

According to the magnetic foreign matter removing device of the embodiment of the present invention, the following effects can be obtained by using the rotary joint and the at least one demagnetizer.

First, a supply pump and a recovery pump may be provided in the water tank to smoothly supply and recover the surfactant solvent to the outer wall of the pipeline inspection probe. In addition, while the surfactant solvent is supplied to and recovered from the outer wall of the probe for inspecting a pipe, the magnetic debris can be removed by the demagnetizer. Accordingly, the magnetic foreign substances can be recovered in the water tank through the demagnetizer, the rotary cylinder, and the rotary joint together with the surfactant solvent. Therefore, the magnetic foreign substances attached to the outer wall of the probe for inspection of the pipe can be smoothly removed.

Second, when the motor rotates, the first rotary part and the second rotary part of the rotary joint rotate, so that the at least one demagnetizer can rotate together with the rotation. Accordingly, the magnetic foreign substances can be removed from the outer wall of the probe for inspection of the pipe over the entire region in the circumferential direction.

1 is a view showing an apparatus for removing magnetic foreign substances according to an embodiment of the present invention.
Fig. 2 is a detailed view of the rotary joint in Fig. 1. Fig.
3 is a view showing that the rear end of the pipe inspection probe is fixed by the first fixing chuck in Fig.
FIG. 4 is a view showing that through holes are formed in the rotary cylinder in FIG. 1; FIG.
FIG. 5 is a view showing an irregular portion contacting the outer wall of the probe for inspection of the inside of the rotary cylinder in FIG. 1. FIG.
FIG. 6 is a view showing that four demagnetizers as shown in FIG. 5 are contacted with the outer wall of the pipe inspection probe in four directions.

The following description and accompanying drawings are for understanding the operation according to the present invention, and parts that can be easily implemented by those skilled in the art can be omitted.

Furthermore, the specification and drawings are not intended to limit the present invention, and the scope of the present invention should be determined by the claims. The terms used in the present specification should be construed to mean the meanings and concepts consistent with the technical idea of the present invention in order to best express the present invention.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

1 shows an apparatus 100 for removing magnetic foreign substances according to an embodiment of the present invention. Figure 2 shows the rotary joint 105 in Figure 1 in detail.

Referring to FIGS. 1 and 2, the magnetic foreign body removing apparatus 100 of the present embodiment removes magnetic foreign substances attached to the outer wall of the piping inspection probe 301 (FIG. 3). The apparatus 100 includes a frame 101, a motor 103, a rotary cylinder 104, at least one demagnetizer (50 in FIG. 5), and a rotary joint 105. 1, reference numeral 301t denotes an electrical wiring connected to a probe for inspection of a pipe (301 in FIG. 3).

In the frame 101, water baths 102s and 102d of a surfactant solvent are formed.

At least one of the demagnetizing portions (50 in Fig. 5) is fastened to the rotary cylinder 104 in the rotary cylinder 104 and rotates to contact the outer wall of the pipe inspection probe (301 in Fig. 3) , And the surfactant solvent is recovered while being supplied to the outer wall of the pipe inspection probe (301 in FIG. 3). At least one demagnetizing portion (50 in Fig. 5) will be described in detail with reference to Fig.

In the rotary joint 201, the first rotating portion 201 fastened to the shaft of the motor 103, the fixing portion 202 fastened to the frame 101, and the second rotating portion 203 fastened to the rotating barrel Lt; / RTI >

The hoses for supplying or discharging a surfactant solvent (not shown for simplification of the drawings in the following) are connected between the fixed portion 202 of the rotary joint 105 and the water tanks 102s and 102d, And is connected between the second rotating portion 203 of the joint 105 and the demagnetizing portion (50 in Fig. 5).

According to the magnetic foreign material removing apparatus 100 as described above, the following effects can be obtained by using the rotary joint 105 and at least one demagnetizing portion (50 in FIG. 5).

First, a supply pump and a recovery pump are provided in the water tanks 102s and 102d, and the surfactant solvent can be smoothly supplied and recovered to the outer wall of the piping inspection probe 301 (FIG. 3). In addition, magnetic foreign matters can be demagnetized by the demagnetizer (50 in FIG. 5) while supplying and recovering the surfactant solvent to the outer wall of the pipe inspection probe (301 in FIG. 3). Accordingly, the magnetic foreign substances can be recovered to the water tanks 102s and 102d through the demineralizer (50 in Fig. 5), the rotary cylinder 104, and the rotary joint 105 together with the surfactant solvent. Therefore, the magnetic foreign substances attached to the outer wall of the pipe inspection probe (301 in Fig. 3) can be smoothly removed.

Second, when the motor 103 rotates, the first rotating part 201 and the second rotating part 203 of the rotary joint 105 rotate, and at least one demagnetizing part (see FIG. 5 50) can also be rotated. Accordingly, magnetic foreign matters can be removed from the outer wall of the pipe inspection probe (301 in Fig. 3) over the entire area in the circumferential direction.

On the other hand, the linear feed mechanism 106 is formed on the frame 101. The first fixing chuck 107a is fastened to the linear feed mechanism so as to be linearly movable, and fixes one end of the pipe inspection probe (301 in Fig. 3). The second fixing chuck 107b of FIG. 6 is fastened to the fixing portion 202 of the rotary joint 105 to fix the other end of the pipe inspection probe 301 (FIG. 3).

The water tanks 102s and 102d of the surfactant solvent are divided into a supply region 102s and a recovery region 102d by a filter net 102f installed in the middle thereof. A surfactant solvent is supplied to the fixed portion 202 of the rotary joint 105 by a supply pump (not shown for simplification of the drawing) in the supply region 102s. The surfactant solvent is recovered from the fixed portion 202 of the rotary joint 105 by the recovery pump (not shown) in the recovery area 102d.

More specifically, the rotary joint 205 of the fixed joint 202 is formed with a rotation output port 204a, a first feed inlet 204a, and a second feed inlet 204b. The recovery main hose is connected between the recovery outlet 204a and the recovery area 102d of the water tank. The first hose for supply is connected between the supply region 102s and the first supply inlet 204b. The second hose for supply is connected between the supply region 102s and the second supply inlet 204c.

A plurality of supply inlets and return outlets 205 are formed in the second rotation part 203 of the rotary joint 105. In the interior of the rotary joint 105, the recovery outlet 204a in the fixed portion 202 is connected to the recovery outlets 205 in the second rotation portion 203 by a number. In addition, the first supply inlet 204b in the fixing portion 202 is connected to the supply inlets 205 in the second rotation portion 203 by a number. The second supply inlet 204c in the fixing portion 202 is connected to the supply inlet 205 (a part of the supply inlet 205 in the second rotation portion 203).

On the other hand, magnetic foreign matters are extracted from the surfactant solvent by a magnet (not shown) installed in the recovery area 102d of the water tank. Thus, the surfactant solvent in the recovery area 102d flows into the supply area 102s through the filter net 102f in a state where the magnetic foreign substances are extracted. Therefore, there is an effect that the surfactant solvent in the recovery area 102d can be recycled.

Fig. 3 shows that the rear end of the pipe inspection probe 301 is fixed by the first fixing chuck 107a in Fig. Since the front end of the piping inspection probe 301 is simply fixed by the second fixing chuck 107b (see Fig. 6), detailed description thereof is omitted.

Referring to Figs. 1 and 3, the first fixing chuck 107a includes a bottom portion 302a and a column 302b. The bottom face portion 302a is fastened to the linear feed mechanism 106. [ A fixing hole 302c and a lead-out hole 302d are connected to an upper portion of the column 302b to form an opening. The electric wiring 301t connected to the piping inspection probe 301 is discharged to the drawing hole 302d through the fixing hole 302c and the rear end of the piping inspection probe 301 is fixed to the fixing hole 302c.

Fig. 4 shows that the through holes 401a to 401c and 402a to 402c are formed in the rotary cylinder 104 in Fig.

Fig. 5 shows a demagnetizing portion 50 in contact with the outer wall of the pipe inspection probe 301 inside the rotary cylinder 104 in Fig.

FIG. 6 shows that the four demagnetizers 601 to 604 as shown in FIG. 5 are in contact with the outer wall of the pipe inspection probe 301 in four directions.

In Figs. 4 to 6, the same reference numerals as those in Figs. 1 and 2 denote objects having the same function. 5 shows a first embodiment in which only one demagnetizing portion 50 is applied. Figs. 4 and 6 show a second embodiment in which four demagnetizers 601 to 604 are applied in four directions. 4 to 6, the magnetic foreign substance removing apparatus 100 of the present embodiment will be described as follows.

One demagnetizer 50, 601 through 604 includes a columnar central core 501, a first desk-like core 502, and a second desk-like core 503.

The AC voltage applying coil is wound around the columnar central core 501.

In the first desk-like core 502, a first columnar core 502a formed on one side of the columnar central core 501 and a first flat plate-like core 502b formed on the columnar central core 501 Respectively.

In the second desk-like core 503, a second columnar core 503a formed on the other side of the columnar central core 501 and a second flat plate-like core 503b formed on the first flat plate-like core 502b, Are connected to each other.

A first collection space 504a of magnetic foreign substances is formed in a lower portion of the first columnar core 502a that contacts the outer wall of the pipeline inspection probe 301. [ A second collection space 504b of magnetic foreign substances is formed below the second columnar core 503a that contacts the outer wall of the pipeline inspection probe 301. [ By forming the collection spaces 504a and 504b in this way, magnetic foreign substances can be removed more efficiently.

At a position above the first collection space 504a, the first hole 505a passes through the first flat plate-like core 502b. At a position above the second collection space 504b, the second hole 505b passes through the first flat plate-like core 502b.

A first supply pipe 506b passing through the second flat plate-like core 503b is located at a position above the first hole 505a. And a second supply pipe 506c passing through the second flat plate-like core 503b at a position above the second hole 505b. Further, a return pipe 506a penetrating the central opening of the columnar central core 501, the first flat plate-like core 502b, and the second flat plate-like core 503b is set up.

When AC power is applied to the coil wound around the columnar central core 501, an alternating magnetic field is generated between the cores 501 to 503. More specifically, the magnetic poles (for example, N pole -> S pole -> N pole -> S pole -> .....) in the columnar central core 501 and the desiccant cores 502, (For example, S pole - > N pole - > S pole - > N pole .....) at the terminals 503 and 503 periodically alternate. (Here, when the pipe inspection probe 301 is an eddy-current type non-destructive inspection, the magnetic poles of the magnets inside the pipe inspection probe 301 are alternately and periodically alternately changed.)

As a result, the magnetic foreign substance attached to the pipeline inspection probe 301 becomes magnetically unstable. Here, the surfactant solvent from the first supply pipe 506b and the second supply pipe 506c is separated from the outer wall of the pipe inspection probe 301, which is a hydrophobic group, It does.

1) is rotated by the rotation of the motor (103 in FIG. 1), so that the first rotary part 201 and the second rotary part 203 of the rotary joint 105 The demagnetizing portions 50 and 601 to 604 also rotate. Here, the surfactant solvent containing magnetic foreign matters is collected in the collection spaces 504a and 504b.

The surfactant solvent collected in the collection spaces 504a and 504b is discharged to the recovery tank (102d in Fig. 1) through the recovery pipe 506a by the force of a recovery pump (not shown).

Through holes (401a to 401c, 402a to 402c, ...) are formed in the rotary cylinder (104). The first supply pipe 506b, the second supply pipe 506c and the return pipe 506a are inserted into the through holes (for example, 401a to 401c) of the rotary cylinder 104. The hoses (not shown) for supplying and discharging the surfactant solvent are connected to the supply openings and the return openings 205 of the second rotary part 203 of the rotary joint (105 in Fig. 1) 104, through holes 401a to 401c, 402a to 402c, ...., respectively.

Therefore, when only one demagnetizer 50 is used (in the case of FIG. 5), only three through holes (for example, 401a to 401c) are required in the rotator 104, Only three of the three outlets (205 out of 205) are required in the second rotary part 203 of the first rotary part 203 of the first embodiment.

12 through holes 401a to 401c, 402a to 402c, .... are required in the rotator 104 when four demagnetizers 601 to 604 are used (in the case of Fig. 6) (More than in the case of Fig. 2) are required in the second rotary part 203 of the first rotary part (105 in Fig. 1).

INDUSTRIAL APPLICABILITY As described above, according to the magnetic foreign matter removing apparatus of the embodiment of the present invention, the following effects can be obtained by using the rotary joint and at least one demagnetizing unit.

First, a supply pump and a recovery pump are provided in the water tank, so that the surfactant solvent can be smoothly supplied and recovered to the outer wall of the probe for piping inspection. In addition, the magnetic foreign matters can be demagnetized by the demagnetizer while supplying and recovering the surfactant solvent to the outer wall of the probe for piping inspection. Accordingly, the magnetic foreign substances can be recovered into the water tank through the demineralizer, the rotary cylinder, and the rotary joint together with the surfactant solvent. Therefore, the magnetic foreign substances attached to the outer wall of the probe for inspection of the pipe can be smoothly removed.

Second, as the motor rotates, the first rotary part and the second rotary part of the rotary joint rotate, so that at least one demagnetizer can rotate together with the rotary joint. Accordingly, the magnetic foreign substances can be removed from the outer wall of the probe for inspection of the pipe over the entire region in the circumferential direction.

The present invention has been described above with reference to preferred embodiments. It will be understood by those skilled in the art that the present invention may be embodied in various other forms without departing from the spirit or essential characteristics thereof. Therefore, the above-described embodiments should be considered in an illustrative rather than a restrictive sense. The scope of the present invention is defined by the appended claims rather than by the foregoing description, and the inventions claimed by the claims and the inventions equivalent to the claimed invention are to be construed as being included in the present invention.

The apparatus of the present invention is highly likely to be used to remove magnetic foreign substances attached to various products as well as probes for inspection of pipes.

100: magnetic foreign matters removing device, 101: frame,
102f: filter net, 102s: supply area,
102d: recovery area, 103: motor,
104: rotary cylinder, 105: rotary joint,
106: a linear feed mechanism, 107a: a first fixing chuck,
107b: second fixing chuck, 201: first rotating part,
202: fixing portion, 203: second rotating portion,
204a: recovery inlet, 204b: first supply inlet,
204c: second supply inlet,
205: feed inlets and withdrawal outlets,
301: Pipe inspection probe, 301t: Electrical wiring,
302a: bottom surface portion, 302b: pillar,
302c: fixing hole, 302d: drawing hole,
401a: first reception through hole,
401b, 401c: first supply through holes,
402a: second reception through hole,
402b, 402c: second supply through holes,
50: demagnetizing portion, 501: columnar central core,
502: first desk-like core, 502a: first columnar core,
502b: a first flat plate type core, 503: a second desk type core,
503a: a second columnar core, 503b: a second flat plate-like core,
504a: first collection space, 504b: second collection space,
505a: first hole, 505b: second hole,
506a: recycling pipe, 506b: first supply pipe,
506c: a second supply pipe, 601: a first degreasing unit,
602: second demagnetizing portion, 603: third demagnetizing portion,
604: Fourth exclusion section.

Claims (7)

An apparatus for removing magnetic foreign substances adhering to an outer wall of a probe for piping inspection,
A frame in which a tank of a surfactant solvent is formed;
motor;
Rotating cylinder;
And at least a portion of the surface active agent is supplied to the outer wall of the probe for inspection, and at least a part of the surface active agent is recovered while supplying the surfactant solvent to the outer wall of the probe for inspection. A demagnetizer; And
And a rotary joint in which a first rotary part fastened to a shaft of the motor, a fixed part fastened to the frame, and a second rotary part fastened to the rotary cylinder are assembled in this order,
Wherein the hoses for supplying or discharging the surfactant solvent are connected between the fixed portion of the rotary joint and the water tub while being connected between the second rotary portion of the rotary joint and the demagnetizer, . The method according to claim 1,
A straight feed mechanism formed on the frame;
A first fixing chuck, which is fastened to the linear feed mechanism so as to be able to move linearly and fixes one end of the pipe inspection probe; And
And a second fixing chuck that is fastened to the fixed portion of the rotary joint and fixes the other end of the pipe inspection probe. The method according to claim 1,
And is divided into a supply region and a recovery region by a filter net installed in the middle,
The surfactant solvent is supplied to the fixed portion of the rotary joint by the supply pump in the supply region,
The surfactant solvent is recovered from the fixed portion of the rotary joint by the recovery pump in the recovery region,
Wherein the magnetic foreign substances are extracted from the surfactant solvent by a magnet in the recovery region. The method according to claim 1,
The four demagnetizers are brought into contact with the outer wall of the pipe inspection probe in four directions,
Wherein each of the four demagnetizers comprises:
A columnar central core wound with an AC voltage applying coil;
A first desk type core connected to a first columnar core formed on one side of the columnar central core and a first flat plate core formed on the columnar central core; And
A second columnar core formed on the other side of the columnar central core, and a second desk core coupled to a second flat plate core formed on the first flat plate type core. 5. The method of claim 4,
A first collecting space of magnetic foreign substances is formed in a lower portion of the first columnar core in contact with an outer wall of the probe for inspecting a pipe,
And a second collection space of magnetic foreign substances is formed below the second columnar core in contact with the outer wall of the probe for inspecting a pipe. 6. The method of claim 5,
A first hole penetrating the first flat plate-like core at a position above the first collection space,
A second hole penetrating the first flat plate-like core at a position above the second collection space,
A first supply pipe extending through the second flat core at a position above the first hole is erected,
A second supply pipe passing through the second flat core at a position above the second hole is erected,
And a return pipe passing through the central opening of the columnar central core, the first flat plate-like core, and the second flat plate-type core is set up. The method according to claim 6,
Through holes are formed in the rotary cylinder,
The first supply pipe, the second supply pipe, and the recovery pipe are inserted into the through-holes of the rotary cylinder,
Wherein the hoses for supplying and discharging the surfactant solvent are connected between the second rotary part of the rotary joint and the through holes of the rotary cylinder.

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