Quality inspection system for chromium coating layer of enhanced accident tolerant fuel for nuclear power plants

Abstract

The present invention relates to a quality inspection system for chromium coating layer of enhanced accident tolerant fuel for nuclear power plants, the quality inspection system allowing rapid transport and inspection of objects to be inspected, and classifying and automatically and separately loading the inspected objects according to the results of the inspection. The quality inspection system according to the present invention comprises an apparatus for feeding objects to be inspected, a rotary transport apparatus, a sorting and loading apparatus, and a control apparatus, wherein the rotary transport apparatus comprises a base unit, first and second rotary transport units, a power generation unit, a power transmission shaft, and a support unit for objects being inspected.

Description

Quality inspection system for chromium coating layers of nuclear fuel for improved accident resistance in nuclear power plants

[0001] The present invention relates to a quality inspection system for a chrome coating layer of accident-resistant nuclear fuel for nuclear power plants, and more particularly, to a quality inspection system for inspecting a chrome coating layer cladding of accident-resistant nuclear fuel (ATF) used to improve the stability of nuclear power plants.

[0002] Accident-resistant nuclear fuel, which is generally used to enhance the safety of nuclear power plants, is a nuclear fuel technology that adds a chromium coating to existing nuclear fuel cladding to suppress cladding oxidation and hydrogen depletion under nuclear power plant accident conditions, thereby maintaining the integrity of nuclear fuel for a long time.

[0003] These accident-resistant nuclear fuels will undergo a quality inspection process to detect coating thickness and defects in the chrome coating layer using an automated inspection system in the final production process of the cladding tube.

[0004] As a conventional technology for inspecting the quality of a tube-shaped specimen as described above, a fuel rod inspection device for manufacturing a nuclear fuel assembly is disclosed in Patent Publication No. 1434933 (hereinafter referred to as “patent document”).

[0005] The above patent document comprises a helium inspection chamber having an entrance door on one side to allow fuel rods to enter and exit horizontally in the longitudinal direction for inspecting whether helium leaks from fuel rods; a fuel rod lifting and transporting unit including first and second transfer units positioned horizontally at the upper and lower ends, respectively, to guide fuel rods being introduced or discharged into the helium inspection chamber, positioned in front of the entrance door; and a fuel rod lifting and transporting unit that drives the first and second transfer units up and down. The fuel rod lifting and lowering unit is arranged in a longitudinal direction of the fuel rod lifting and lowering unit and has a main frame having an upper transporter having an inclined surface in the direction of the fuel rod lifting and lowering unit, and a lower transporter provided below the upper transporter and having an inclined surface opposite to the inclined surface of the upper transporter. The upper transporter is additionally provided with a stopper member capable of protruding and driving on a transport path of the fuel rod, and the stopper member includes first and second stoppers that are formed to protrude upward at both ends of a lever member that is rotatably provided on the upper transporter, and a rotary driving member for rotating the lever member, and the first and second stoppers have a constant interval and protrude from opposite points with respect to the transport surface of the upper transporter.

[0006] However, the above patent document has a problem in that the device for transporting the subject and the device for inspection are configured separately, so there is a large limitation on the space for installing the inspection system, and at the same time, the amount of the subject to be transported between processes is large, so the inspection takes a long time.

[0007] In addition, since the tested specimens are transported to the subsequent process via a conveyor, there is a difficulty in having to directly select the specimens separately and manage the subsequent process based on the test results.

[0008]

[0009] Therefore, there is a need for the development of an automated quality inspection system with an improved structure that can quickly transport and inspect specimens, while classifying and loading specimens separately based on the inspection results.

[0010] The present invention has been devised to solve the problems of the conventional quality inspection system for zirconium cladding for nuclear power plants as described above, and the problem to be solved by the present invention is to provide a quality inspection system for a chromium coating layer of nuclear fuel for improved accident resistance for nuclear power plants, which can quickly perform transport and inspection of cladding (hereinafter referred to as “subject to be inspected”), and automatically classify and separately load the subject to be inspected according to the inspection results.

[0011]

[0012] In order to solve the above problem, the present invention provides a quality inspection system for a chromium coating layer of nuclear fuel for improved accident resistance for nuclear power plants, comprising: a subject supply device that sequentially supplies a plurality of subjects individually; a rotary conveyor device that rotates and transports the subjects supplied through the subject supply device; a selective loading device that sorts and loads the discharged subjects according to the test results after inspection is performed through an inspection device while the subjects pass through the rotary conveyor device; and a control device that controls the operations of the subject supply device, the rotary conveyor device, and the selective loading device, wherein the rotary conveyor device comprises: a base portion having a frame structure having a predetermined height and length; first and second rotary conveyors that are installed symmetrically to face each other on both upper sides of the base portion and rotate and transport the subjects supplied in an axial direction while being aligned in position through the subject supply device toward the selective loading device; a power generation unit that is installed on the base portion and transmits rotational power to the first rotary conveyor device; A power transmission shaft installed in the base portion and transmitting the rotational power of the power generation portion to the second rotation transfer portion; and a subject support portion located between the first and second rotation transfer portions and supporting the rotational transfer of the subject to form an area for surface inspection of the subject, wherein the first and second rotation transfer portions are configured to rotate the subject while simultaneously transporting it in the axial direction through feeding rollers that are installed radially spaced apart from each other at a predetermined interval while being inclined at a predetermined angle with the outer surface of the subject, and the selective loading device is characterized by including a positioning unit that positions the position of the subject that has passed through the second rotation transfer portion at a predetermined position; a subject transport unit that grips the subject positioned in the positioning unit and transports it to a predetermined height; and a loading unit that classifies the subject objects transported through the subject transport unit according to the inspection results and loads them at different positions.

[0013] And the power generating unit of the present invention includes a motor installed in the base portion; and a driving pulley of a predetermined diameter installed on a driving shaft of the motor, and the first and second rotary transfer units include a pair of mounting plates vertically installed on both upper sides of the base portion to have a predetermined size; a main pulley installed to rotate on a lower side of one side of the pair of mounting plates; a first linkage pulley installed on one side of the pair of mounting plates to rotate a first feeding roller that comes into contact with an outer surface of the subject; a second linkage pulley installed on the other side of the one side of the pair of mounting plates to rotate a second feeding roller that comes into contact with an outer surface of the subject; And a third linkage pulley is installed on the upper side of one side of the pair of mounting plates and rotates a third feeding roller that comes into contact with the outer surface of the subject, and the main pulley is connected to the first, second, and third linkage pulleys through a first belt so that rotational power is transmitted thereto, and an auxiliary pulley is installed on the main pulley of the first rotation transfer unit so that rotational power is transmitted thereto through a second belt having a predetermined length, and the main pulleys of the first and second rotation transfer units are each connected to each other through the power transmission shaft so that they are configured to be rotationally linked.

[0014] In addition, another feature of the present invention is that one or more feeding rollers selected from the first, second, and third feeding rollers of the present invention are arranged so that the axis center line of the feeding roller is inclined at a predetermined angle with respect to the axis center line of the subject so that the subject is rotated and transported in one direction.

[0015] In addition, the subject transport unit of the present invention is characterized by including: a plurality of installation stands vertically installed to have a predetermined height; a driving motor installed on the upper portion of the installation stands; a rotary shaft of a predetermined length installed horizontally to connect the plurality of installation stands while being rotated by the driving motor; a plurality of rotary arms installed at predetermined intervals from the rotary shaft; a mounting block of a predetermined size rotatably installed on one end of the rotary arm and having a mounting groove of a predetermined depth formed on the upper surface for mounting the subject, the mounting block transporting the subject positioned in the position alignment unit to the loading unit; and a weight body of a predetermined size installed on the lower portion of the mounting block so as to maintain the vertical position of the mounting block by its own weight so as to prevent the subject mounted in the mounting groove from being dislodged.

[0016]

[0017] According to the present invention, a test object having a plating layer formed on its surface is aligned in position through a test object supply device, then an encoder for measuring the rotation amount is connected, and then, in the process of being rotated and transported toward a selective loading device through a rotation transport device, it passes through an inspection section where the thickness and cracks of the plating layer are inspected, and thus, multiple tests can be sequentially and quickly performed continuously, so there is an advantage in that the time required for inspecting the test object is greatly shortened.

[0018] In addition, since the specimens are automatically classified and discharged based on the test results, such as whether the specimens are normal, that is, whether there are defects in layer thickness, cracks, and delamination, there is an advantage in that the subsequent process of selecting the specimens based on the test results can be reduced.

[0019]

[0020] Figure 1 is a schematic diagram showing an example of a quality inspection system for zirconium cladding tubes for nuclear power plants.

[0021] Figure 2 is a perspective view showing an example of a rotary conveyor among the quality inspection systems for chrome coating layers of nuclear fuel for improved accident resistance for nuclear power plants according to the present invention.

[0022] Figure 3 is a front view showing an example of a rotary conveyor among the quality inspection systems for chrome coating layers of nuclear fuel for improved accident resistance for nuclear power plants according to the present invention.

[0023] Figure 4 is a plan view of Figure 2.

[0024] Figures 5 to 7 are drawings showing examples of a rotary transport unit according to the present invention.

[0025] Figure 8 is a drawing showing an example in which the first, second, and third feeding rollers according to the present invention are arranged at an angle with respect to the subject.

[0026] Figure 9 is a perspective view showing an example of a selective loading device among the quality inspection systems for chrome coating layers of nuclear fuel for improved accident resistance for nuclear power plants according to the present invention.

[0027] Figure 10 is a plan view of Figure 9.

[0028] Fig. 11 is a drawing showing an example of a guide part among the selective loading devices according to the present invention.

[0029] Figures 12 and 13 are drawings showing examples of a gripping section of a selective loading device according to the present invention.

[0030] Fig. 14 is a drawing showing an example of a rotary arm of a gripping unit rotating in a selective loading device according to the present invention.

[0031] Fig. 15 is a drawing showing an example of a loading section among the selective loading devices according to the present invention.

[0032] Fig. 16 is a drawing showing an example in which the grinding of the discharge guide bar is extended through the extension bar of the loading section among the selective loading devices according to the present invention.

[0033] Figures 17 and 18 are drawings showing examples of a subject being selected and loaded through a selective loading device according to the present invention.

[0034]

[0035] Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the attached drawings.

[0036]

[0037] The present invention provides a system for inspecting the quality of a chromium coating layer of nuclear fuel for improved accident resistance of nuclear power plants, which can quickly transport and inspect a subject, and automatically load the subject separately by classifying the subject according to the inspection results. As shown in FIG. 1, the present invention includes a subject supply device (2), a rotary transport device (100), a selective loading device (200), and a control device (3).

[0038] Hereinafter, for the convenience of explanation, the direction arranged perpendicular to the central axis of the cladding pipe (1) is referred to as the “axial direction” and the direction arranged parallel to the central axis of the cladding pipe (1) is referred to as the “axial direction”.

[0039]

[0040] The specimen supply device (2) is configured to align specimens (1) having a predetermined length in a direction perpendicular to the axis and then sequentially supply them one by one toward the rotary transport device (100) described below.

[0041] An encoder (without drawing symbol) for detecting the rotation amount of a subject (1) being rotated and transported through a rotary transport device (100) may be installed in such a subject supply device (2). At this time, the encoder may be inserted and fixed at a predetermined depth into one end of the subject (1) to detect the rotation amount of a rotation shaft (not shown) that rotates together with the subject (1).

[0042]

[0043] The rotary transport device (100) is configured to rotate and transport the subject (1) supplied through the subject supply device at a predetermined speed and at the same time secure a predetermined inspection area for performing surface inspection of the subject (1) through an inspection device (not shown).

[0044] This rotary transport device (100) comprises a base part (110) of a frame structure having a predetermined height and length, as shown in FIGS. 2 to 4, first and second rotary transport parts (120A, 120B) which are installed symmetrically on both sides of the upper portion of the base part (110) to face each other and rotate and transport the subject (1) supplied in the axial direction by aligning the position through the subject supply device toward the selective loading device (200) to be described later, a power generation part (130) which is installed on the base part (110) and transmits rotational power to the first rotary transport part (120A), a power transmission shaft (140) which is installed on the base part (110) and transmits the rotational power of the power generation part (130) to the second rotary transport part (120B), and a power transmission shaft (140) which is located between the first and second rotary transport parts (120A, 120B) and supports the rotational transport of the subject (1). It includes a subject support part (150) that forms an area for surface inspection of the subject (1).

[0045] And, as shown in Fig. 4, the base part (110) may further be installed with first and second connecting plates (111, 112) that connect the specimen supply device (2) and the selective loading device (200) on both sides to prevent them from moving randomly between processes.

[0046] In addition, the power generation unit (130) may be configured to include a motor (131) installed in the base unit (110) and a drive pulley (132) of a predetermined diameter installed on the drive shaft of the motor (131).

[0047] In addition, the first and second rotary transport units (120A, 120B) are provided with a pair of mounting plates (121) vertically installed at a predetermined interval on both sides of the upper portion of the base portion (110) as shown in FIGS. 5 to 7, a main pulley (122) having a predetermined diameter installed on the lower side of one side of the pair of mounting plates (121) and rotating, a first linkage pulley (123) installed on one side of the pair of mounting plates (121) and rotating a first feeding roller (123A) that contacts the outer surface of the subject (1), a second linkage pulley (124) installed on the other side of the pair of mounting plates (121) and rotating a second feeding roller (124A) that contacts the outer surface of the subject (1), and a second linkage pulley (124) installed on the upper side of one side of the pair of mounting plates (121) It includes a third linkage pulley (125) that rotates a third feeding roller (124A) that comes into contact with the outer surface of the subject (1).

[0048] At this time, the first, second, and third feeding rollers (123A, 124A, 125A) may be positioned on the other side of the mounting plate (121) and may be configured to be connected to each other through a belt (without drawing symbol) having a predetermined length so as to rotate in conjunction with the rotational motion of the first, second, and third linkage pulleys (123, 124, 125).

[0049] In addition, one or more feeding rollers selected from among the first, second, and third feeding rollers (123A, 124A, and 125A) can be arranged so that the axis center line (C2) of the feeding roller is inclined at a predetermined angle (A, preferably 1 to 10°) with respect to the axis center line (C1) of the subject (1), as illustrated in FIG. 8, so that the subject (1) is rotated together at a predetermined speed by the rotational motion of the first, second, and third feeding rollers (123A, 124A, and 125A), and at the same time, the forward pressure transferred in the axial direction through the inclined feeding roller is transmitted to the subject (1), so that the subject (1) is transferred in the axial direction.

[0050] In addition, the main pulley (122) is connected to the first, second, and third linkage pulleys (123, 124, 125) and the first belt (V1) so that rotational power is transmitted as shown in FIG. 5, and an auxiliary pulley (122A) having a predetermined diameter may be further installed on the main pulley (122) of the first rotation transfer unit (120A), and this auxiliary pulley (122A) and the drive pulley (132) of the power generation unit (130) may be connected so that rotational power is transmitted through a second belt (V2) having a predetermined length.

[0051] In addition, the main pulleys (122) of each of the first and second rotary transfer units (120A, 120B) can be configured to be connected to each other through a power transmission shaft (140) and to be rotationally linked, as shown in FIGS. 3 and 7.

[0052] In addition, a tension adjusting member (126) for adjusting or maintaining the tension of the first belt (V1) may be further installed in the first and second rotary conveyors (120A, 120B). At this time, the tension adjusting member (126) may be configured to include a handle of a predetermined length that is rotatably installed on one side of the mounting plate (121), and a pressure roller (126A) of a predetermined diameter that is installed at one end of the handle and comes into contact with the first belt (V1). Through this tension adjusting member (126), the user adjusts the angle of the handle within a predetermined angle range as needed, thereby adjusting the pressure with which the pressure roller (126A) installed at one end presses the first belt (V1), thereby appropriately adjusting the tension of the first belt (V1).

[0053] In addition, a guide member (127) may be further installed on one side of the mounting plate (121) to guide the subject (1) to be inserted toward the first and second feeding rollers (123A, 124A, 125), and this guide member (127) may be formed in a structure in which a plate having a predetermined length is bent to form a “ㄷ” shape and both ends are bent to a predetermined width on both sides.

[0054] And the main pulley (122), auxiliary pulley (122A), first, second, third linkage pulleys (123, 124, 125) and driving pulley (132) can be configured as timing pulleys, and the first and second belts (V1, V2) can be configured as timing belts, through which the rotational power generated from the motor (131) of the power generation unit (130) is transmitted without loss due to slipping or the like and is reliably transmitted toward the first, second, and third feeding rollers (123A, 124A, 125A).

[0055] Meanwhile, the subject support part (150) may be configured to include a base plate (151) installed horizontally on the upper surface of the base part (110) to have a predetermined length as illustrated in FIG. 7, a plurality of installation plates (152) formed in an “L” shape and installed vertically at predetermined intervals on the upper portion of the base plate (151), and first, second, and third support rollers (153, 154, 155) installed at predetermined intervals on one side of the installation plate (152).

[0056] At this time, the first, second, and third support rollers (153, 154, 155) may be formed of rollers having the same diameter as the first, second, and third feeding rollers (123A, 124A, 125A) and may be arranged on concentric circles.

[0057] This subject support member (150) plays a role in stably supporting a subject (1) having a predetermined length so that deformation such as bending does not occur due to rotational force or self-weight due to the gap between the first and second rotational transport members (120A, 120B) during the process of being rotated and transported through the first and second rotational transport members (120A, 120B), and at the same time plays a role in forming a spaced apart space so that a probe or sensor of an inspection device can be placed close to the subject (1).

[0058] Through the configuration of the above-described rotary transport device (100), the rotational power generated from the motor (131) of the power generation unit (130) is simultaneously transmitted to the first and second rotary transport units (120A, 120B) on both sides through the second belt (V2) and the power transmission shaft (140), and the rotational power transmitted in this way is transmitted to the first, second and third connecting pulleys (123, 124, 125) through the first belt (V1), causing the first, second and third feeding rollers (123A, 124A, 125A) to rotate at a constant speed, and as a result, the subject (1) passing through the first, second and third feeding rollers (123A, 124A, 125A) rotates at a speed in the range of approximately 6000 to 9000 RPM, as described below. It is transferred to the selective loading device (200).

[0059] And since the rotational transfer force can be transmitted through the first and second rotational transfer units (120A, 120B) until the subject (1) completely passes through the rotational transfer device (100), reliable rotational transfer of the subject (1) is ensured.

[0060] In addition, deformation such as eccentric rotation of the subject (1) is prevented through a plurality of subject support parts (150) arranged between the first and second rotating transport parts (120A, 120B), and thus, the subject (1) located in this area is inspected through an inspection device for uniformity of the plating layer thickness, occurrence of cracks, and occurrence of interlayer separation, thereby ensuring accurate inspection results.

[0061] Meanwhile, the inspection device placed on the subject support part (150) side of the rotary transport device (100) can be operated by selecting various known inspection devices depending on the purpose and method of inspecting the subject (1), and therefore, a description of the configuration of the inspection device is omitted.

[0062]

[0063] The selective loading device (200) is configured to classify and load the discharged test subject (1) according to the test results after the test is performed through the inspection device while passing through the rotary conveyor (100).

[0064] This selective loading device (200) may be configured to include a positioning unit (210) that positions the position of the subject (1) that has passed through the second rotating transport unit (120B) at a predetermined position, as shown in FIGS. 9 and 10, a subject transport unit (220) that grips the subject (1) positioned in the positioning unit (210) and transports it to a predetermined height, and a loading unit (230) that classifies the subject (1) transported through the subject transport unit (220) according to the test results and loads them at different positions.

[0065] And, as illustrated in FIG. 11, the position alignment unit (210) includes a plurality of supports (211) installed at a predetermined interval in the axial direction along which the subject (1) is discharged, an elevation base (212) of a predetermined length installed horizontally on the upper portion of the supports (211) so as to be height-adjustable, a plurality of subject alignment units (213) installed at a predetermined interval on the upper surface of the elevation base (212), and a subject pressure unit (214) installed on one side of the elevation base (212) to selectively fix the subject (1) above the subject alignment unit (213) so as not to be dislodged.

[0066] In addition, a plurality of cylinder units (211A) that support the lower surface of the lifting base (212) may be installed on the upper surface of the support (211), and a height adjustment handle (211B) that simultaneously controls a plurality of cylinder units (211A) may be installed on one side of the upper portion of the support (211).

[0067] In addition, the subject alignment unit (213A) may be installed in multiple sets at a predetermined interval along the length of the lifting base (212) with the first and second guide rollers (213A, 213B) symmetrically centered on the subject (1) so that the bottom surfaces on both sides of the subject (1) are supported, as one set.

[0068] And the subject pressure unit (214) may be configured to include an inverted “ㄱ” shaped mounting base (214A) whose lower end is connected to one side of the elevating base (212) via a hinge axis (21A’) in an angle-adjustable manner and whose upper end is selectively positioned above the subject alignment unit (213), a pressure roller (214B) that is installed on the upper end of the mounting base (214A) and selectively comes into contact with the upper outer surface of the subject (1), and a cylinder unit (214C) that is located on one side of the elevating base (212) and adjusts the installation angle of the mounting base (214A).

[0069] Through the configuration of the position alignment unit (210) as described above, the subject (1) supplied through the rotary transport device (100) is aligned in position while being supported at three points by the first and second guide rollers (213A, 213B) of the subject alignment unit (213) and the pressure roller (214B) of the subject pressure unit (214). After the subject (1) is completely transferred toward the position alignment unit (210), the installation angle of the mounting base (214A) is adjusted through the cylinder unit (214C) so that the subject (1) can be transported toward the loading unit (230) through the subject transport unit (220) described later, thereby releasing the restraint of the subject (1) through the pressure roller (214B).

[0070] Meanwhile, the subject transport unit (220) includes a plurality of installation stands (221) installed vertically to have a predetermined height as shown in FIGS. 12 and 13, a driving motor (222) installed on one side of the upper portion of the installation stands (221), a rotary shaft (223) of a predetermined length installed horizontally to connect the plurality of installation stands (221) while rotating by being connected to the driving motor (222) through a reduction member (222A), a plurality of rotary arms (224) installed at predetermined intervals on the rotary shaft (223), and a mounting block (225) of a predetermined size that is installed rotatably on one end of the rotary arm (224) and has a mounting groove (without drawing symbol) of a predetermined depth formed on the upper surface for mounting the subject (1) located on the position alignment unit (210) to transport the subject (1) to the loading unit (230), and the It can be configured to include a weight body (226) of a predetermined size that is installed at the bottom of the settling block (225) and maintains the upper and lower positions of the settling block (225) by its own weight to prevent the subject (1) settling in the settling groove from being dislodged.

[0071] Through the configuration of the subject transport unit (220) as described above, as shown in FIG. 14, when the driving motor (222) rotates, the rotation speed is reduced at a predetermined rate through the reduction member (222A) and transmitted to the rotation shaft (223), and when the rotation shaft (223) rotates counterclockwise, a plurality of rotation arms (224) are simultaneously rotated, and as the rotation arm (224) rotates in this way, the mounting block (225) installed at the tip is always positioned at the top in the mounting groove due to the weight of the weight body (226), and in this state, when the mounting block (225) is positioned on the bottom surface of the subject (1) between the subject alignment part (213) of the position alignment part (210), the subject (213) is naturally settled in the mounting groove, and thereafter, as the rotation of the rotation arm (224) continues, the subject (213) It is moved toward the loading section (230) described later while being settled on the settling block (225).

[0072] Meanwhile, the loading unit (230) may be configured to include a structural frame (231) installed horizontally and vertically at a predetermined interval as illustrated in FIG. 15, a plurality of discharge guide bars (232) installed vertically at a predetermined interval above and below the structural frame (231) and formed so that the other end is relatively higher than the other end and installed at a predetermined angle, and an extension member (233) installed at the other end of the discharge guide bar (232) and selectively extending the length of the discharge guide bar (232).

[0073] At this time, the discharge guide bar (232) may be formed short so that the length of the other end deviates from a certain distance from the radius of rotation of the rotary arm (224) of the subject transport unit (220), and may be configured to be discharged by classifying each layer into normal, poor plating layer thickness, poor crack, and poor interlayer separation.

[0074] In addition, the extension member (233) may be configured to include an installation bracket (233A) of a predetermined size installed on one side of the other end of the discharge guide bar (232) as shown in FIG. 16, a rotation unit (233B) having a rotation axis (without drawing symbol) having a predetermined length vertically installed on the installation bracket (233A), and an extension bar (233C) of a predetermined length having one end portion installed on the rotation axis of the rotation unit (233B) and rotating.

[0075] At this time, the rotation unit (233B) can be automatically controlled remotely through the control device (3) described later, and the operation of the extension member (233) that is suitable for the classification position according to the inspection result of the subject (1) is controlled through the control device (3), so that the length of the discharge guide bar (232) is selectively extended through the extension bar (233C), and as a result, the subject (1) that is transported along a movement path of a predetermined diameter by being seated on the seating block (225) by the rotational operation of the rotary arm (224) as shown in FIGS. 17 and 18 is caught and seated on the extension bar (233C) and moved and loaded in one direction along the discharge guide bar (232).

[0076] That is, based on the inspection results of the subject (1), the extension bar (233C) at a position that matches the classification criteria is rotated to selectively extend the length of the discharge guide bar (232), and as a result, the selected extension bar (233C) is positioned on the path of the subject (1) moving along the rotary arm (224), and the subject (1) mounted on the mounting block (225) is caught on the extension bar (233C) and moved from the mounting block (225) toward the extension bar (233C), and thereafter, due to the inclination of the extension bar (233C), it is naturally moved toward the discharge guide bar (232) and loaded.

[0077]

[0078] The control device (3) is configured to control the operation of the subject supply device (2), the rotary transport device (100), the inspection device (not shown), and the selective loading device (200), and may include a control panel for setting the transport speed of the subject (1), the rotation speed, the measurement value of the inspection device, and the control value for controlling the operation of the extension member (233), and a display for monitoring the inspection progress in real time.

[0079]

[0080] As described above, the present invention is characterized in that a test subject having a plating layer formed on its surface is aligned in position through a test subject supply device, an encoder for measuring the rotation amount is connected, and then, in the process of being rotated and transported toward a selective loading device through a rotation transport device, the test subject passes through an inspection section for inspecting the thickness and cracks of the plating layer, and thus, multiple tests can be performed sequentially and quickly, thereby greatly reducing the time required for inspection of the test subject.

[0081] In addition, since the specimens are automatically classified and discharged based on the test results, such as whether the specimens are normal, that is, whether there are defects in layer thickness, cracks, and delamination, the subsequent process of selecting the specimens based on the test results can be reduced.

[0082]

[0083] In the above, for the convenience of explanation, a preferred embodiment has been described by giving drawing numbers and names to the components shown in the drawings, but this is only one embodiment according to the present invention, and the scope of the rights should not be interpreted as being limited to the shapes shown in the drawings and the names given, and it will be readily apparent that changes to various shapes predictable from the description of the invention and simple substitutions with components that perform the same function are within the scope of changes that can be easily performed by a person skilled in the art.

[0084] (Explanation of symbols)

[0085] 1: Subject 2: Subject supply device

[0086] 3: Control device 100: Rotating conveyor

[0087] 110: Base 111: First connecting plate

[0088] 112: Second connecting plate 120A: First rotary conveyor

[0089] 120B: Second rotary conveyor 121: Mounting plate

[0090] 122: Main pulley 122A: Auxiliary pulley

[0091] 123: First linkage pulley 123A: First feeding roller

[0092] 124: Second linkage pulley 124A: Second feeding roller

[0093] 125: Third linkage pulley 125A: Third feeding roller

[0094] 126: Tension control member 126A: Pressure roller

[0095] 127: Guide member 130: Power generation unit

[0096] 131: Motor 132: Drive pulley

[0097] 140: Power transmission shaft 150: Test subject support part

[0098] 151: Base plate 152: Mounting plate

[0099] 153: First support roller 154: Second support roller

[0100] 155: Third support roller 200: Selective loading device

[0101] 210: Positioning unit 211: Support

[0102] 211A: Cylinder unit 211B: Height adjustment handle

[0103] 212: Lifting base 213: Subject alignment unit

[0104] 213A: First guide roller 213B: Second guide roller

[0105] 214: Subject pressure part 214A: Mounting base

[0106] 214A': Hinge shaft 214B: Pressure roller

[0107] 214C: Cylinder unit 220: Subject transport unit

[0108] 221: Installation stand 222: Drive motor

[0109] 222A: Reduction member 223: Rotating shaft

[0110] 224: Rotating arm 225: Settling block

[0111] 226: Weight 230: Loading part

[0112] 231: Structural frame 232: Exhaust guide bar

[0113] 233: Extension member 233A: Mounting bracket

[0114] 233B: Rotating unit 233C: Extension bar

[0115] A: Angle of inclination C1: Center line of the subject

[0116] C2: Feeding roller axis center line

[0117] V1: First belt V2: Second belt

Claims

1. A specimen supply device that sequentially supplies a plurality of specimens (1) individually; A rotary transport device (100) that rotates and transports a specimen (1) supplied through the above specimen supply device; A selective loading device (200) that classifies and loads the discharged test subject (1) according to the test results after the test is performed through the inspection device while passing through the above-mentioned rotary conveyor (100); and A control device that controls the operation of the above-mentioned specimen supply device, rotary transport device (100), and selective loading device (200); Including, The above rotary conveyor (100) is A base part (110) of a frame structure having a predetermined height and length; First and second rotary transport units (120A, 120B) that are installed symmetrically facing each other on both upper sides of the base unit (110) and rotate and transport the subject (1) supplied in the axial direction through the subject supply device in an aligned position toward the selective loading device (200); A power generation unit (130) installed on the base unit (110) and transmitting rotational power to the first rotation transfer unit (120A); A power transmission shaft (140) installed on the base portion (110) and transmitting the rotational power of the power generation portion (130) to the second rotation transfer portion (120B); and A test body support unit (150) positioned between the first and second rotation transfer units (120A, 120B) to support rotational transfer of the test body (1) and form an area for surface inspection of the test body (1); Includes, The above first and second rotary transport units (120A, 120B) are The above-mentioned subject (1) is configured to be rotated and simultaneously transported in the axial direction through a feeding roller that is installed radially spaced apart at a predetermined interval while being in contact with the outer surface of the subject (1) at a predetermined angle, The above selective loading device (200) is A position alignment unit (210) that positions the subject (1) that has passed through the second rotary conveyor (120B) at a fixed position; A subject transport unit (220) that holds the subject (1) positioned in the position alignment unit (210) and transports it to a predetermined height; and A loading unit (230) that classifies the subject (1) transported through the subject transport unit (220) according to the test results and loads them at different locations; A quality inspection system for a chromium coating layer of nuclear fuel for nuclear power plants, characterized by including:

2. In claim 1, The above power generation unit (130) is A motor (131) installed in the above base portion (110); and A drive pulley (132) of a predetermined diameter installed on the drive shaft of the above motor (131); Including, The above first and second rotary transport units (120A, 120B) are A pair of mounting plates (121) installed vertically on both upper sides of the above base portion (110) to have a predetermined size; A main pulley (122) installed to rotate on the lower side of one side of the above pair of mounting plates (121); A first linkage pulley (123) installed on one side of the above pair of mounting plates (121) and rotating the first feeding roller (123A) that comes into contact with the outer surface of the subject (1); A second linkage pulley (124) installed on one side of the pair of mounting plates (121) and rotating a second feeding roller (124A) that comes into contact with the outer surface of the subject (1); and A third linkage pulley (125) installed on the upper side of one side of the pair of mounting plates (121) and rotating the third feeding roller (124A) that comes into contact with the outer surface of the subject (1); Including, The above main pulley (122) is It is connected so that rotational power is transmitted through the first, second, and third linkage pulleys (123, 124, 125) and the first belt (V1). In the main pulley (122) of the first rotary transfer unit (120A), An auxiliary pulley (122A) is installed so that rotational power is transmitted through the above-mentioned drive pulley (132) and a second belt (V2) having a predetermined length. The main pulley (122) of each of the first and second rotary transfer units (120A, 120B) is A quality inspection system for a chromium coating layer of nuclear fuel for nuclear power plants, characterized in that the chromium coating layer is configured to be connected to each other through the power transmission shaft (140) and to be rotated.

3. In claim 2, One or more feeding rollers selected from the first, second, and third feeding rollers (123A, 124A, 125A) above, A system for inspecting the quality of a chromium coating layer of nuclear fuel for improved accident resistance of a nuclear power plant, characterized in that the axis center line (C2) of the feeding roller is arranged to be inclined at a predetermined angle (A) with respect to the axis center line (C1) of the above-mentioned subject (1) so that the subject (1) is rotated and transported in one direction.

4. In claim 1, The above specimen transport unit (220) is A plurality of installation stands (221) installed vertically to have a predetermined height; A driving motor (222) installed on the upper part of the above installation stand (221); A rotary shaft (223) of a predetermined length installed horizontally to connect the plurality of installation stands (221) while rotating through the driving motor (222); A plurality of rotary arms (224) installed at predetermined intervals on the above rotary shaft (223); A mounting block (225) of a predetermined size that is rotatably installed on one end of the rotary arm (224) and has a mounting groove of a predetermined depth formed on the upper surface for mounting the subject (1) thereon, and transports the subject (1) positioned on the positioning unit (210) to the loading unit (230); and A weight body (226) of a predetermined size that is installed at the bottom of the above-mentioned settling block (225) and maintains the upper and lower positions of the above-mentioned settling block (225) by its own weight, thereby preventing the above-mentioned subject (1) settling in the above-mentioned settling groove from being dislodged; A quality inspection system for a chromium coating layer of nuclear fuel for nuclear power plants, characterized by including:

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