KR101441502B1 - Cutting apparatus and flating apparatus and method of treatment for pipe contaminated by radioactivity - Google Patents

Abstract

The present invention relates to a cutting apparatus, a processing apparatus for flattening and a treating method for pipes contaminated by radioactivity, for cutting a pipe in half in the longitudinal direction and flattening in order to easily conduct decontamination and contamination examination on a pipe contaminated by radioactivity. A cutting apparatus for pipes contaminated by radioactivity according to the present invention comprises a fixing pressing plate connected to a first supporter by a first spherical bearing, and supporting one end of a pipe contaminated by radioactivity; a moving pressing plate connected to a slider by a second spherical bearing, and contacting the other end of the pipe; an operating shaft where one end thereof is combined with the slider by a turning pair and where a male screw is formed on the outer circumferential surface; a second supporter where a female screw is formed to guide the operating shaft; a handlebar bound to the other end of the operating shaft to rotate the operating shaft; a vice part for fixing the position of the pipe by being equipped with a guide which respectively guides the both ends of the slider; and a cutting part cutting the position-fixated pipe in half in the longitudinal direction.

Description

FIELD OF THE INVENTION [0001] The present invention relates to a cutting apparatus, a flattening processing apparatus, and a processing method of a pipe contaminated with radioactivity,

The present invention relates to a technique for decontaminating radioactive contaminated pipes, and more particularly to a radioactive decontamination technique for cutting radioactive contaminated pipes by cutting the pipe in the lengthwise direction to facilitate decontamination treatment and contamination inspection, The present invention relates to a cutting apparatus for a contaminated pipe, a flat plate processing apparatus, and a treatment method.

Generally, nuclear power plants that have reached the end of their life will be dismantled and restored. At this time, a large amount of radioactive waste is generated in the decommissioning process of the nuclear power plant and related facilities.

Also, since the systems of nuclear power plants are connected and operated through numerous pipelines, it is estimated that the amount of pipes polluted by radioactivity is considerably high, and nuclear facilities are also the same.

On the other hand, if the radioactive contaminated pipes are completely decontaminated, they can be reused as resources, and the storage space and management cost of radioactive waste can be considerably reduced, so that economic impact power is expected to be considerable.

However, it is very difficult to decontaminate the inner surface of a pipe contaminated with radioactivity mechanically or chemically, and it is also extremely difficult to check whether radioactive decontamination occurs even if decontamination treatment is performed. Particularly, the radioactive decontamination treatment and the contamination inspection on the inner surface of a pipe having a small diameter were almost impossible.

Due to these problems, waste of resources has been intensified by compressing or melting the circular pipe contaminated with radioactivity and treating it as radioactive waste.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems of the prior art and it is an object of the present invention to provide a pipe cutting apparatus for radioactive contamination, Apparatus and a method for processing the same.

In order to accomplish the object of the present invention as described above,

A stationary pressure plate which is connected to the first support surface by a first sphere and which supports one end of the pipe contaminated with radioactivity, a movement plate which is connected to the second spherical surface side of the slider and contacts the other end of the pipe, A second support rod formed with a female screw and guiding the movable shaft, a handle coupled to the other end of the movable shaft to rotate the movable shaft, A vice unit having a guide for guiding both ends of the slider to position and fix the pipe; And a cutting portion for bisecting the positionally fixed pipe in the longitudinal direction.

Further, in the cutting apparatus according to an embodiment of the present invention, it is preferable that a pipe support for placing the pipe at a predetermined height position, and a clamp for preventing the pipe from being detached are further provided.

The guide may be a slider guide for guiding one end of the slider and guiding one end of the slider, and a pedestal guide for guiding the other end of the pipe pedestal and guiding the other end of the slider.

The circular block has an outer diameter substantially equal to the large diameter of the pipe and is formed on the entire surface of the circular block so as to be inserted and supported at the other end of the pipe, A first jig including a bolt for engaging with a female thread of a bolt insertion hole eccentrically formed on the upper side of the rear surface of the circular block and a lock nut for fastening the bolt, And the first jig is used when the length of the pipe is shorter than the length of the pipe pedestal.

The circular block has an outer diameter substantially equal to the small diameter of the pipe and is formed on the entire surface of the circular block so as to be inserted and supported at the other end of the pipe, And a second jig including a bolt thread engaged with a female thread of a bolt insertion hole formed in a central axis of the circular block and a lock nut for fastening the bolt, And the second jig is preferably used when the length of the pipe is shorter than the length of the pipe pedestal.

In the cutting apparatus according to an embodiment of the present invention, the cutting portion includes a pair of rails arranged at regular intervals so as to be parallel to the longitudinal direction of the pipe, a movable block guided by the pair of rails, A ball screw disposed between the pair of rails, both ends of which are supported by the first and second blocks and rotated by the first motor, and a ball fixed to the movable block, A spindle hub fixed to the movable block so as to be perpendicular to the longitudinal direction of the pipe; a spindle inserted in the spindle hub and supported by the bearing and rotated by the second motor; And a flat cutter for cutting the pipe.

In this case, it is preferable to further include a cut-off tank having a cutting agent stored therein, and a tube connected to the cut-off tank to supply a cut-off to the cutter.

It is preferable that a limit switch for detecting the position of the flat cutter to control the first and second motors is further provided.

It is another object of the present invention to

A hydraulic pump provided in the main body, and a hydraulic pump for supplying hydraulic pressure to the hydraulic ram, wherein a pipe bisected in the longitudinal direction by the cutting device according to the present invention is connected to the hydraulic ram And the flat plate is formed by the pressure between the pressing plate located at the upper end and the upper surface of the main body.

As another category, the object of the present invention as described above is that,

Collecting the radioactive contaminated pipes and cutting them vertically in the longitudinal direction (S100); (S200) of locating the cut pipe in the vice section of the cutting apparatus according to any one of claims 1 to 8; (S300) cutting the upper end of the pipe while cutting the cutting device in the longitudinal direction of the pipe; (S400) rotating the pipe (P) by 180 degrees to fix the position of the cut pipe (P) to the vise unit (S400); And cutting the lower end of the pipe (P) to divide the pipe into two (S500); (S600) flattening the bisected pipe by using the flattening processing apparatus according to claim 9; Decontaminating the flattened pipe (S700); And a step (S800) of inspecting the decontaminated pipe for contamination.

The apparatus for cutting a radioactive contaminated pipe according to the preferred embodiment of the present invention can firmly fix the pipe through the presser plate structure of the vise part regardless of the cut surface of the pipe.

Further, the vise part according to the present invention can perform the cutting operation on various pipes having various diameters and lengths in one apparatus by using the first and second jig.

In addition, the cutting apparatus of the present invention can cut the pipe in the longitudinal direction by dividing the pipe into two parts by cutting the pipe fixed to the first and second motors. The flattening processing apparatus using the hydraulic press has a semi- It is possible to increase the radius of curvature of the pipe of the pipe.

Accordingly, the apparatus for cutting a radioactive contaminated pipe according to the present invention, the flat plate processing apparatus and the processing method can easily perform the decontamination treatment of a physical, mechanical or chemical method by flattening various pipes contaminated with radioactivity . In addition, the pipe waste that has passed the pollution inspection is recycled as general waste, thereby preventing waste of resources and obtaining an economic benefit. In addition, an economical benefit can be obtained as the management cost for storing the radioactive waste is reduced.

Other objects, specific advantages and novel features of the present invention will become more apparent from the accompanying drawings, the following detailed description and the preferred embodiments.

1 is a front view of an apparatus for cutting a radioactive contaminated pipe according to an embodiment of the present invention;
2 is a plan view of Fig.
3 is a side view of Fig.
4A and 4B are views for explaining the function of a pressure plate for fixing a radioactive contaminated pipe to a vise part;
5 is a view showing a pipe pedestal and a clamp applied to a pipe having a large diameter.
6 is a view showing a first jig applied to a pipe having a large diameter;
7 is a view showing a state in which a pipe having a larger diameter and a length greater than that of the pipe pedestal of Fig. 7 is fixed to the vice section.
8 is a view showing a state in which a pipe having a diameter larger than that of the pipe pedestal and having a considerably shorter length is fixed to the vice section by using a jig of the same shape as shown in Fig.
9 is a view showing a state in which a pipe having a diameter larger than that of the pipe pedestal and having a length slightly shorter than the pipe pedestal is fixed to the vise portion of the cutout portion using a jig as shown in Fig.
10 is a view showing a pipe pedestal and a clamp applied to a pipe having a small diameter.
11 is a view showing a second fixture applied to a pipe having a small diameter;
12 is a view showing a state in which a pipe having a diameter smaller than that of the pipe pedestal is fixed to the vice unit.
Fig. 13 is a view showing a state in which a pipe having a small diameter and a length shorter than that of the pipe pedestal is fixed to the vise section using a jig of the same shape as shown in Fig.
Fig. 14 is a view showing a state in which a pipe having a small diameter and a length slightly shorter than the pipe pedestal is fixed to a vice section of a cut section using a jig of the same shape as shown in Fig.
15 is a view showing a panel of a cutting apparatus according to the present invention.
16 is a view for explaining an apparatus for flattening a radioactive contaminated pipe according to an embodiment of the present invention.
17 is a flow chart illustrating a method of treating a radioactive contaminated pipe in accordance with an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may unnecessarily obscure the subject matter of the present invention.

(Cutting device of radioactive contaminated pipe)

1 is a front view of a cutting apparatus for contaminated pipes contaminated with radioactivity according to an embodiment of the present invention, Fig. 2 is a plan view of Fig. 1, and Fig. 3 is a side view of Fig. 1 to 3, the cutting apparatus according to an embodiment of the present invention includes a vise unit V for fixing and unscrewing a radioactive contaminated pipe P, a fixed pipe P And a cut-out portion C which is bisected in the longitudinal direction.

The vise portion V includes a fixed press plate 4, a movable press plate 5, a movable shaft 8, a second support plate 9, a handle 10, a slider guide 11, a pedestal guide 12, (13), a clamp (15), and the like.

The holding plate 4 is a pressing plate for holding one end of the pipe P contaminated with radioactivity and includes a first support 2 fixed to one side of the base 1 and a second support 2 fixed to one side of the base 1 as shown in Figs. And is connected to the spherical left side (3).

The movement plate 5 is a press plate for supporting the other end of the pipe P contaminated with radioactivity and the movement plate 5 is connected to the slider 7 movably installed at the second spherical surface 6.

Specifically, the movable shaft 8 having the male screw formed on the outer circumferential surface thereof is configured such that one end portion thereof is engaged with the slider 7 in a pivotal manner, and the second support base 9 on which the female screw is formed guides the movable shaft 8 . A handle 10 is provided at the other end of the movable shaft 8 to rotate the movable shaft 8 so that the slider 7 and the movable presser plate 5 can move forward or backward in a straight line, (P) can be fixed or released.

According to the present embodiment, the slider 7 is guided by the side grooves of the slider guide 11 whose both ends are fixed to the base 1 and the side grooves of the pedestal guide 12 fixed to the base 1 .

4A and 4B are views for explaining the function of the pressure plate for fixing the radioactive contaminated pipe to the vise portion. The fixed presser plate 4 and the movable presser plate 5 according to the present invention are connected by the first and second spherical surfaces 3 and 6 as shown in Figs. 4A and 4B, It is possible to rotate within a certain range over the whole range of 360 ° of the upper, lower, left and right around the left (3, 6). Even if the cut surface of the pipe P contaminated with radioactivity shown in FIGS. 1 to 3 is not perpendicular to the longitudinal direction of the pipe P, the contact area between the cut surface of the pipe P and the press plates 4 and 5 Can be maintained constantly, thus making it possible to securely fix the position.

In the absence of the press plates 4 and 5 using the first and second spherical surfaces 3 and 6 of the present invention, the pipe P is detached from the pipe P in the longitudinal direction, It is possible to damage the flat cutter 36, the cover 40 and the tube 53 to be brought into contact with each other, and the cutting apparatus of the present invention may be damaged.

Even if the length of the pipe P is not constant, the position of the movement plate 5 can be adjusted by adjusting the position of the pipe P because the movement plate 5 can move on the straight line by the slider 7 and the movable shaft 8. [ Can be fixed firmly.

5 is a view showing a pipe pedestal and a clamp applied to a pipe having a large diameter. Meanwhile, the pipe pedestal 13 of the present invention seats the pipe P at a predetermined height position for cutting. At this time, the pipe pedestal 13 is located inside the slider guide 11 and the pedestal guide 12 as shown in Fig. 3, and is guided by them.

The pipe support 13 shown in FIG. 5 is adapted to be applied to a pipe having a large diameter, and the pipe support 13 has a long groove with a large diameter so as to contact the bottom of the pipe outer peripheral surface. The clamp 15, which is in contact with the upper part of the pipe outer peripheral surface, is bolted to one end of the pipe pedestal 13 to prevent the pipe from being detached. The slider guide 11 and the pedestal guide 12 are coupled to each other by bolts 14.

6 is a view showing a first jig that is applied to a pipe having a large diameter. The first jig shown in Fig. 6 is used for the case where the diameter of the pipe P is large and the length is shorter than the above-described pipe pedestal 13, and the circular jig 60, the circular press plate 61, 62 and a lock nut 63 as shown in Fig.

The outer diameter of the circular block 60 is formed to be substantially equal to the large diameter of the pipe P. [ A bolt insertion hole 60a is formed eccentrically on the upper side of the rear surface of the circular block 60, and a spherical surface 60b is formed on the front surface side. Specifically, in order to fasten a pipe having various diameters in one apparatus to the vise V, the central axis of the movable shaft 8 and the central axis of the bolt screw 62 of the first jig must be arranged in a straight line So that the bolt insertion hole 60a is eccentrically formed from the central axis of the circular block 60. [

The circular presser plate 61 is formed on the front side of the circular block 60 so as to be inserted into and supported by the other end of the pipe P and rotates at an arbitrary angle by the spherical surface 60b of the circular block 60 It is possible. Therefore, it is possible to securely fix the position of the pipe P even if the cut surfaces of the pipe P are not perpendicular to the longitudinal direction of the pipe P.

The bolt screw 62 is inserted into the bolt insertion hole 60a of the circular block 60. At this time, a female screw (not shown) is formed in the bolt insertion hole 60a to engage with the bolt screw 62 so that the length of the first jig can be adjusted and the bolt screw 62 can be adjusted using the lock nut 63. [ So as not to rotate.

Hereinafter, an embodiment will be described with reference to FIGS. 7 to 9, in which a pipe having a large diameter is fixed by using a vise section V and a first jig according to the present invention.

Fig. 7 is a view showing a state in which a pipe having a larger diameter and longer than the pipe support of Fig. 7 is fixed to the vice section. As shown in FIG. 7, in the case of the pipe P1 whose diameter is large and which is longer than the pipe pedestal 13, the first jig described above is not used. That is, even if the length of the pipe P1 is not constant, since the movement plate 5 can be moved on the straight line by the slider 7 and the movable shaft 8, the position of the movement plate 5 The pipe P1 can be firmly fixed in position.

8 is a view showing a state in which a pipe having a relatively large diameter and a considerably shorter length than the pipe pedestal is fixed to the vice section using a jig as shown in Fig. As shown in FIG. 8, in the case of the pipe P2 having a diameter which is larger than that of the pipe pedestal 13, the first jig described above is used. At this time, the bolt screw 62 is drawn out from the circular block 60 of the first jig. That is, a first jig having a relatively long length is disposed between the pipe P2 and the movable press plate 5 to fix the position of the pipe P2.

9 is a view showing a state in which a pipe having a diameter larger than that of the pipe support is slightly fixed to a vise portion of a cut portion using a jig as shown in Fig. 9, a pipe P3 having a diameter slightly shorter than that of the pipe pedestal 13 is used to remove the bolt screw 62 and the lock nut 63 from the circular block 60 of the first jig. do. That is, the first jig having a relatively short length is disposed between the pipe P2 and the movable press plate 5 to fix the position of the pipe P2.

10 is a view showing a pipe pedestal and a clamp applied to a pipe having a small diameter. Meanwhile, as shown in FIG. 10, the vise V of the cutting apparatus according to the present invention is provided with a pipe support 13 'for mounting a pipe having a small diameter and a clamp 15'. That is, the upper surface of the pipe pedestal 13 'is formed with a groove having a small diameter so as to be in contact with the lower part of the outer circumferential surface of the pipe, and the clamp 15' has a small diameter so as to be in contact with the upper part of the pipe circumferential surface.

11 is a view showing a second fixture applied to a pipe having a small diameter. The second jig shown in Fig. 11 is for use when the diameter of the pipe P is small and the length is shorter than the above-described pipe pedestal 13, and the circular jig 60 ', the circular presser plate 61' And a bolt screw 62 and a lock nut 63.

The outer diameter of the circular block 60 'is formed to be substantially equal to the small diameter of the pipe P. [ A bolt insertion hole 60a 'for inserting the bolt screw 62 is formed in the center of the rear surface of the circular block 60', and a spherical surface 60b 'is formed on the front surface side. At this time, the bolt inserting hole 60a 'is formed with a female screw (not shown) to be engaged with the bolt screw 62. The bolt screw 62 is arranged in a straight line with the above-described movable shaft 8.

The circular presser plate 61 'is formed on the front side of the circular block 60' so as to be inserted into and supported by the other end of the pipe P and is supported by the spherical surface 60 ' . Therefore, it is possible to securely fix the position of the pipe P even if the cut surfaces of the pipe P are not perpendicular to the longitudinal direction of the pipe P.

12 is a view showing a state in which a pipe having a diameter smaller than that of the pipe pedestal is fixed to the vice section. As shown in FIG. 12, in the case of the pipe P4 having a small diameter and a length greater than that of the pipe pedestal 13 ', the above-described second jig is not used. That is, since the movable presser plate 5 is movable in a straight line, the pipe P4 can be fixed firmly even if the length of the pipe P4 is not constant.

Fig. 13 is a view showing a state in which a pipe having a small diameter and a length shorter than that of the pipe pedestal is fixed to a vice section by using a jig of the type shown in Fig. As shown in FIG. 13, a second fixture is used in the case of a pipe P5 having a small diameter and a significantly shorter length than the pipe pedestal 13 '. At this time, the bolt screw 62 'is drawn out from the circular block 60' of the second jig. That is, a second jig having a relatively long length is disposed between the pipe P5 and the movable press plate 5 to fix the position of the pipe P5.

14 is a view showing a state in which a pipe having a small diameter and a length slightly shorter than the pipe pedestal is fixed to a vice section of a cut section using a jig as shown in Fig. In the case of the pipe P6 having a small diameter as shown in Fig. 14 and a length slightly shorter than the pipe pedestal 13 ', the bolt screw 62 and the lock nut 63 are removed from the circular block 60' of the second jig use. That is, the second jig having a relatively short length is disposed between the pipe P6 and the movement plate 5 to fix the pipe P6.

Hereinafter, a cut portion C of a cutting apparatus according to an embodiment of the present invention will be described with reference to FIGS. 1 to 14. FIG.

The cut portion C is formed by the rail 16, the movable block 29, the ball screw 25, the first motor 20, the ball screw nut 28, the spindle hub 33, the spindle 35, A flat cutter 36, a section eliminating tank 50, limit switches 30 and 31, and the like.

The pair of rails 16 are arranged at regular intervals so as to be parallel to the longitudinal direction of the pipe P. Specifically, according to the present embodiment, as shown in Fig. 3, a pedestal guide 12 fixed to the base 1 and a rail support block 17 arranged parallel to the pedestal guide 12 are provided on the rails 16 are disposed.

A movable block (29) is provided movably on the pair of rails (16).

The ball screw 25 is threaded on the outer circumferential surface and disposed between the pair of rails 16. Both ends of the ball screw 25 are supported by the first and second blocks 23 and 27 and are rotated by the first motor 20, respectively.

Specifically, according to the present embodiment, the first motor 20 is fixed to the motor bracket 21 fixed to the first block 23 for supporting the support unit 24 of the ball screw 25, 1 The motor 20 and the ball screw 25 are connected by a support coupling 22. The other end of the ball screw 25 is supported by the support unit 26 and the support unit 26 is fixed to the second block 27.

The ball screw nut 28 is formed with a female screw for fitting and engaging the ball screw 25, and is fixed to the movable block 29 and moves together. Accordingly, the ball screw nut 28 and the movable block 29 are moved forward or backward as the ball screw 25 is rotated forward and reverse by the first motor 20.

The spindle hub 33 serves to support the spindle 35 and is fixed to the movable block 29 at a right angle to the longitudinal direction of the pipe P. [

The spindle 35 is inserted into the spindle hub 33 and supported by the bearing and is driven by the second motor 38 to rotate the flat cutter 36.

Concretely, the flat cutter 36 is fastened to one end of the spindle 35 to cut the pipe P fixed in position by the vise V in the longitudinal direction. A first pulley 34 is provided at the other end of the spindle 35 and a second pulley 37 is provided at the second motor 38 disposed above the spindle hub 330. At this time, The pulley 34 and the second pulley 37 are connected by a V-belt.

The flat cutter 36 can be replaced by a commercial tool, and is provided with a cover 39 for preventing the cutting and the scattering of chips. At this time, when replacing the flat cutter (36), the cover (39) is detached by unscrewing the butterfly nut (40).

In addition, the cutting apparatus of the present invention is provided with a cut-and-insert injection device for removing chips and heat generated when the flat cutter 36 cuts the pipe P. The section elimination tank 50 is disposed above the second motor 38 as shown in FIG. A tube 53 serving as a section eliminating induction pipe is connected to the lower portion of the section elimination tank 50, and the incision is sprayed to the flat cutter 36 to be supplied. At this time, the tube 53 is provided with a valve 52 for on-off the supply of the cut-off.

The limit switches 30 and 31 serve to detect the position of the flat cutter 36 to control the first and second motors 20 and 38 described above. Specifically, the limit switches 30 and 31 can be fixed at arbitrary positions along grooves formed on the side surfaces of the rail support block 17 on which the rails 16 are mounted, as shown in FIGS.

The fixed limit switch 30 detects the backward position of the spindle hub 33 by driving the first motor 20 and is fixed to the side groove of the rail support block 17 by the fixing bolt 32. [

The variable limit switch 31 detects the advance position of the spindle hub 33 by driving the first motor 20 and is fixed to the side groove of the rail support block 17 by the fixing bolt 32. The variable limit switch 31 has a structure capable of adjusting the position according to the length of the pipe P contaminated with radioactivity.

15 is a view showing a panel of a cutting apparatus according to the present invention. The apparatus for cutting a radioactive contaminated pipe according to an embodiment of the present invention includes a panel having a plurality of buttons and a lamp as shown in FIG. From the top, a power lamp, an emergency button, a power on-off, a cycle button (1 cycle on-off), a second motor operation button (cutting motor speed, And a first motor operation button (feeding motor speed, forward, on-off).

The cutting apparatus according to the embodiment of the present invention is characterized in that the pipe P contaminated with radioactivity is fixed to the vise unit V and the cutting unit C moves along the longitudinal direction of the pipe P, The upper end portion is cut. Then, the position fixing of the vise portion (V) is released and the worker rotates the pipe (P) by 180 ° such that the lower end of the uncut pipe (P) is on the upper side, and fixes the pipe (P) again. The cutting portion C is moved in the longitudinal direction of the pipe P to cut the upper end of the pipe P so that the pipe P is bisected in the longitudinal direction. It is possible to perform the direct decontamination treatment on the bisected pipe, or to carry out the decontamination treatment after performing the flattening treatment through the flattening processing apparatus described later.

(Of radioactive contaminated pipes) Flattening  Processing apparatus)

16 is a view for explaining an apparatus for flattening a radioactive contaminated pipe according to an embodiment of the present invention. The flat plate machining apparatus according to the embodiment of the present invention comprises a hydraulic press body 70, a hydraulic ram 72, and a hydraulic pump 75 as shown in FIG.

The hydraulic press body 70 is provided with a hydraulic ram 72 therein.

The hydraulic ram 72 is provided with pressure plates 73, 74 that operate upward by hydraulic pressure to increase the radius of curvature of the pipe.

The hydraulic pump 75 provides the hydraulic pressure to the hydraulic ram 72 by the operation of the lever 75a.

The flattening processing apparatus according to the present invention is characterized in that it comprises a first step of increasing the radius of curvature of the pipe Pa divided into two as shown in Fig. 16 and having a semicircular cross-sectional shape, and a second step of flattening the pipe Pb having an increased radius of curvature The secondary process is carried out in a separate hydraulic press.

The primary process proceeds by a repetitive operation of a hydraulic press with a first pressing plate 73 having a symmetrically downwardly sloping top surface on both sides.

Then, the secondary process is carried out by the repeated operation of the hydraulic press with the second pressing plate 74 having the flat upper surface.

At this time, the pipes Pa and Pb are deformed by the pressure between the pressing plates 73 and 74 and the upper surface of the main body 71, and finally the flattened pipe Pc can be obtained. That is, the radioactivity existing inside and outside the pipe becomes easy to decontamination treatment and pollution inspection.

(Treatment of radioactive polluted pipes)

17 is a flowchart illustrating a method of treating a radioactive contaminated pipe according to an embodiment of the present invention.

In the method of treating a radioactive contaminated pipe according to an embodiment of the present invention, first, the pipe P contaminated with radioactivity is collected and cut vertically in the longitudinal direction so as to have an appropriate length (SlOO). At this time, it is preferable that the inside and outside of the pipe P are primarily subjected to the decontamination treatment and the subsequent procedure is performed.

Next, the cut pipe P is fixed by the vise portion V of the cutting apparatus described above (S200).

Next, the flat cutter 36 cuts the upper end portion of the pipe P while the cut portion C of the cutting device moves in the longitudinal direction of the pipe P (S300).

Next, the position fixing state of the vise portion V is released, and the pipe P is rotated 180 degrees so that the lower end portion of the uncut Pipe P is on the upper side, and is fixed again to the vice portion V (S400).

Next, the cut portion C is moved again in the longitudinal direction of the pipe P, and the upper end of the pipe P is cut to obtain a pipe P having a semicircular cross section divided into two parts (S500).

Next, flattening processing of increasing the radius of curvature is repeatedly performed using the hydraulic press of the flat plate forming apparatus described above (S600).

Finally, the flattened pipe is decontaminated (S700), and the decontaminated pipe is inspected for contamination (S800).

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. It is to be understood that various changes and modifications may be made without departing from the scope of the appended claims.

P, P1, P2, P3, P4, P5, P6: pipe
V: Vice section C: Cutting section
1: Base
2: first support frame 3: first spherical surface
4: stationary presser plate 5: movement presser plate
6: second spherical left side 7: slider
8: movable shaft 9: second support
10: Handle 11: Slider guide
12: pedestal guide 13, 13 ': pipe pedestal
14: Bolts 15, 15 ': Clamp
16: rail 17: rail support block
20: first motor 21: motor bracket
22: support coupling 23: first block
24: Support unit 25: Ball screw
26: Support unit 27: Second block
28: ball screw nut 29: movable block
30: Fixed limit switch 31: Variable limit switch
32: Fixing bolt 33: Spindle hub
34: first pulley 35: spindle
36: Pitch cutter 37: Second pulley
38: second motor 39: cover
40: butterfly nut 50: tear-off tank
52: valve 53: tube
60, 60 ': circular block 60a, 60a': bolt insertion hole
61, 61 ': circular presser plate 62: bolt screw
63: Lock nut 71: Hydraulic press body
72: Hydraulic ram 73: First pressure plate
74: second pressure plate 75: hydraulic pump
75a: Lever

Claims (10)

A stationary pressure plate connected to the first support base and the first spherical surface side for supporting one end of the radiation contaminated pipe,
A movement plate which is connected to the slider and the second spherical surface and is in contact with the other end of the pipe,
A movable shaft whose one end is coupled to the slider in a rotationally paired manner and has a male screw formed on its outer circumferential surface,
A second support having a female thread formed therein to guide the movable shaft,
A handle coupled to the other end of the movable shaft to rotate the movable shaft,
A vice unit having a guide for guiding both ends of the slider to position and fix the pipe; And
And a cutting section for bisecting the position-fixed pipe in the longitudinal direction.
The method according to claim 1,
A pipe support for placing the pipe at a predetermined height position, and a clamp for preventing the pipe from being detached.
3. The method of claim 2,
The guide
A slider guide for guiding one end of the pipe pedestal and guiding one end of the slider,
Wherein the guide is a pedestal guide for guiding the other end of the pipe pedestal and guiding the other end of the slider.
The method of claim 3,
A circular block 60 having an outer diameter substantially equal to the inner diameter of a pipe having a large inner diameter and formed with a spherical surface,
A circular presser plate formed on a front surface of the circular block so as to be inserted into and supported by the other end of the pipe and having a spherical surface corresponding to a spherical surface of the circular block,
A bolt engaged with the female thread of the bolt insertion hole formed eccentrically on the upper side of the rear surface of the circular block,
Further comprising a first jig including a lock nut for fastening the bolt,
Wherein the first jig is used when the length of the pipe is shorter than the pipe pedestal.
The method of claim 3,
A circular block having an outer diameter substantially equal to an inner diameter of a pipe having a small inner diameter,
A circular presser plate formed on a front surface of the circular block so as to be inserted into and supported by the other end of the pipe and having a spherical surface corresponding to a spherical surface of the circular block,
A bolt thread engaging with the female thread of the bolt insertion hole formed in the central axis of the circular block and
Further comprising a second jig including a lock nut for fastening the bolt,
Wherein the second jig is used when the length of the pipe is shorter than that of the pipe pedestal.
The apparatus according to claim 1,
A pair of rails arranged at regular intervals so as to be parallel to the longitudinal direction of the pipe,
A movable block guided by the pair of rails,
A ball screw disposed between the pair of rails, both ends of which are supported by the first and second blocks and rotated by the first motor,
A ball screw nut fitted in the ball screw and fixed to the movable block,
A spindle hub fixed to the movable block so as to be perpendicular to the longitudinal direction of the pipe,
A spindle inserted into the spindle hub and supported by the bearing and rotated by the second motor,
And a flat cutter coupled to one end of the spindle for cutting the pipe.
The method according to claim 6,
And a tube connected to the cut-off tank to supply the cut-out to the flat cutter.
The method according to claim 6,
Further comprising a limit switch for detecting the position of the flat cutter to control the first and second motors.
delete Collecting the radioactive contaminated pipes and cutting them vertically in the longitudinal direction (S100);
(S200) of locating the cut pipe in the vice section of the cutting apparatus according to any one of claims 1 to 8;
(S300) cutting the upper end of the pipe while cutting the cutting device in the longitudinal direction of the pipe;
(S400) rotating the pipe (P) by 180 degrees to fix the position of the cut pipe (P) to the vise unit (S400); And
Cutting the lower end of the pipe (P) to divide the pipe into two (S500);
A step (S600) of flattening the bisected pipe using a flat plate processing apparatus;
Decontaminating the flattened pipe (S700); And
(S800) a pollution inspection of the decontaminated pipe,
In the step S600,
A hydraulic press body,
A hydraulic ram provided in the main body,
And a hydraulic pump for supplying hydraulic pressure to the hydraulic ram,
Wherein a bisected pipe is flattened by pressure between a pressurizing plate located at the top of the hydraulic ram and an upper surface of the main body.

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