KR20110054435A - Welding table and welding apparatus for weldign spacer grid of nuclear fuel rod - Google Patents

Abstract

PURPOSE: A welding table and welding device for welding spacer grid of nuclear fuel rod is provided to reduce a production time of a support grad by omitting a support grad re-setting process. CONSTITUTION: A welding table and welding device for welding spacer grid of nuclear fuel rod comprises a first welding spin plate(350), a second welding spin plate(360) and a welding tool fixture. The first welding spin plate is rotated around a horizontal shaft with a rotating transmission device. A second welding spin plate is located on the center of the first welding spin plate and rotates around a vertical axis. A yoke fixes the welding tool installed at the second welding spin plate. The support bracket fixes the yoke to the second welding spin plate to move side to side. The rotary arm is installed in the first welding spin plate to rotate. The driving part transfers torque to the rotary arm.

Description

Nuclear Fuel Rod Support Grid Welding Table and Nuclear Fuel Rod Support Grid Welding System {WELDING TABLE AND WELDING APPARATUS FOR WELDIGN SPACER GRID OF NUCLEAR FUEL ROD}

The present invention relates to a nuclear fuel rod support lattice welding table and a nuclear fuel rod support lattice welding device which can quickly and easily perform welding of a support lattice supporting a nuclear fuel rod.

A nuclear reactor is a device designed to be used for various purposes such as generating heat by generating artificial fission reaction of fissile material, producing radioisotopes and plutonium, or forming a radiation field.

In general, light water reactors use enriched uranium with an increased ratio of uranium-235 to 2-5%. In order to process the nuclear fuel used in nuclear reactors, uranium is molded into cylindrical pellets weighing about 5g. The pellets are charged into a Zircaloy cladding tube, a spring and helium gas are added thereto, and the end caps are welded to produce fuel rods. The fuel rods are charged into the framework and finally form a nuclear fuel assembly to be burned by nuclear reaction in the reactor.

Therefore, it is essential to manufacture the support grid in order to form the fuel assembly.

1 is a welding apparatus disclosed in Korean Patent Laid-Open Publication No. 10-2009-32770 of the prior art for manufacturing a support grid 2 by performing welding while rotating a welding fixture 210 installed inside a welding chamber of a welding apparatus. The welding table mounted inside is shown.

As shown in FIG. 1, the support grid 2 is fixed using the welding jig 210 to weld the support grid 2. The welding fixture 210 is fixed to the holder 220 of which the center is hollow, and then mounted on the upper portion of the second welding rotating plate 360 inside the welding apparatus. Thereafter, the first welding rotating plate supporter 146 is supported and rotated about the horizontal axis by the rotation transmitting device 114 about the first welding rotating plate 350 and the holder 220 and rotates about the vertical axis. The welding grid 210 is rotated by using the second welding rotating plate 360 to perform laser welding to the intersection of the support grids 2 by the laser welding part 200 to manufacture the support grids 2. . The laser condensing state of the laser welding part 200 of FIG. 3 of the laser welding part 200 is schematically illustrated.

However, in the prior art, after the holder 220 is fixed by the rotation bar 371, the second welding rotary plate 350 is rotated 180 degrees, such that the welding fixture 210 is positioned on the bottom surface of the first welding rotary plate 350. In the case where the holder 371 is not removed, the welding fixture 210 cannot be rotated about the vertical axis by using the second welding rotating plate 360. In addition, in this state, when releasing the fixing of the rotary bar 371 for fixing the holder 220, the welding jig 210 falls. Therefore, the welding apparatus of the prior art has a problem in that the welding jig 210 cannot be rotated about the vertical axis in the state where the welding jig 210 is located at the bottom of the welding table, so that welding cannot be performed.

Therefore, in the case of the support grid welding device of the prior art, when the welding jig 210 is to be welded to the bottom of the operator to place the welding jig 210 to the upper position after separating from the holder 220 and then back up and down The welding had to be carried out by fixing.

Accordingly, the prior art has a problem in that the welding process of the support grid takes a lot of time to reduce the productivity of the support grid.

Accordingly, the present invention is to solve the above-mentioned problems of the prior art, to provide a nuclear fuel rod support grid welding table and a nuclear fuel rod support grid welding device to improve the productivity of the support grid by quickly and easily welding the nuclear fuel rod support grid. It aims to do it.

Nuclear fuel rod support grid welding table of the present invention for achieving the above object, the nuclear fuel rod support grid welding having a welding chamber and a welding unit and a rotation transmission device installed in the welding chamber and a welding table rotated by the rotation transmission device An apparatus, comprising: a first welding rotary plate rotated about a horizontal axis by the rotary transfer device; and a second welding rotary plate seated at a center of the first welding rotary plate and rotated about a vertical axis; And a welding fixture fixture for fixing the welding fixture fixing the support grid to the second welding rotating plate so as not to be separated from the vertical direction of the second welding rotating plate without disturbing rotation about the vertical axis of the second welding rotating plate. Characterized in that the configuration.

The welding fixture fixture, the yoke for fixing the welding fixture seated on the second welding rotary plate; and the support bracket for fixing the yoke on the second welding rotary plate to move left and right; and on the first welding rotary plate A rotatable arm rotatably seated on the rotatable arm to move the yoke to the left or right to fix or release the yoke; And, a drive unit for transmitting a rotational force to the pivotal arm; may be configured to include.

The support bracket may further include an elastic body that presses the yoke in the center direction of the second welding rotary plate while the yoke is coupled.

Nuclear fuel rod support grid welding apparatus of the present invention for achieving the above object, the welding chamber of which one side is opened in a hollow shape; and a rotation transmission device mounted inside the welding chamber; and the inside of the welding chamber A welding table seated on the welding jig to rotate in a spherical shape; and a welding part configured to perform welding on a support grid coupled to the welding jig in the welding chamber; and preventing rotation of the second welding swivel plate about a vertical axis. It is characterized in that it comprises a; welding fixture fixture for fixing the welding fixture to the second welding rotary plate not to be separated in the vertical direction to the second welding rotary plate.

In the present invention, when performing welding to the support lattice, it is possible to rotate the free lattice of the support lattice in the 360 degree direction in the welding apparatus, thereby avoiding the repositioning operation of the support lattice to quickly and easily support the nuclear fuel rod. It is possible to produce a grid, thereby significantly improving the productivity of the support grid.

In addition, the present invention does not require a separate work for changing the position of the support grid during welding, thereby minimizing safety accidents that may occur to the operator.

Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings.

2 is a perspective view of a support grid welding device (hereinafter referred to as a "welding device") according to an embodiment of the present invention.

As shown in FIG. 2, the welding device 100 has a conveyor device 510 positioned adjacent to the opening and closing plate 381 so as to carry a support grid or a welded support grid for welding in order to automate a welding process. An access device 520 for pushing or removing the support grid or the welded support grid into the welding chamber 320 is positioned to face the opening and closing plate 381.

Inside the welding apparatus 1, the laser welding unit 200 (refer to FIG. 3), the welding table 100 (refer to FIG. 4), the laser supply device (not shown), and the respective driving for rotational driving of the welding table are shown in the drawing. Device and the like. The laser welding part 200 of the embodiment of the present invention becomes the welding part of the present invention.

Since the configuration of the welding device 1 can be applied to a variety of known configurations, such as those disclosed in the Republic of Korea Patent Publication No. 10-2009-32770 of the prior art, a detailed description thereof will be omitted, and the welding table 100 and the laser in the following Only the structure of the welding part 200 is demonstrated.

3 is a perspective view of a laser welding part 200 for laser welding mounted to the welding apparatus 1 of FIG. 2.

As shown in FIG. 3, the laser welding part 200 includes an x-axis linear motion device 160 that moves left and right for welding, and a y-axis linear motion device 170 that moves forward and backward. 180 is configured to include. The laser welding part 200 having the above configuration is mounted on the upper portion of the welding chamber 320 of FIG. 2. Since each configuration of the laser welding part 200 is disclosed in the prior art, the detailed description thereof will be omitted.

4 is a diagram illustrating a welding table 100 mounted to the welding apparatus 1 of FIG. 2.

As shown in FIG. 4, the welding table 100 includes a rotation transmission device 144, a first welding rotating plate support device 146, a first welding rotating plate 350, a second welding rotating plate 360, and a welding fixture fixture 101. It is configured to include.

 The rotation transmission device 144 is configured to provide a rotational force for rotating the first welding rotating plate 350 about the horizontal axis.

The first welding rotating plate support device 146 is configured to support the first welding rotating plate 350 so that the first welding rotating plate 350 may rotate about a horizontal axis.

The second welding rotary plate 360 is configured to rotate about a vertical axis passing through the second welding rotary plate 360 in a state where the welding jig 210 is mounted on the upper side.

The welding fixture fixture 101 supports and supports the air cylinder 110 having the air cylinder shaft 111 mounted on the first rotating plate 350 and the yoke 130 mounted on the second welding rotating plate 360. One end portion is rotatably coupled to the air cylinder shaft 111 of the air cylinder 110 to transfer the driving force of the bracket 140 and the air cylinder 110 to the yoke 130 and the center portion of the first welding rotary plate ( It is rotatably fixed to the 350 and the other end is configured to include a rotatable arm 120 detachably attached to the yoke 130.

Hereinafter, a detailed configuration of the pivot arm 120, the yoke 130, and the support bracket 140 will be described with reference to FIGS. 5 and 7.

5 is a perspective view of the pivot arm 120 in the configuration of the welding table 100 of FIG.

As shown in FIG. 5, the pivotal arm 120 is formed in an L-shape, and a cylinder shaft hole 123 is formed at one end coupled to the air cylinder shaft 111, and the first welding rotating plate 350 is bent at the bent position. In order to be rotatably coupled to the rotating shaft hole 121 is coupled to the rotating shaft 121a (see FIG. 4) is formed, and the other end is formed with a yoke engaging portion 122 that is engaged or released with the yoke 130. . 5, the yoke engaging portion 122 is formed to have a stepped portion, but the shape of the yoke engaging portion 122 is not limited thereto, and the yoke engaging portion grooves 134 and 6 formed in the yoke 130 are illustrated in FIG. It can have any shape that can be combined).

FIG. 6 is a perspective view of the yoke 130 of the configuration of the welding table 100 of FIG. 4.

As shown in FIG. 6, the yoke 120 is fixed to the edge of the lower support plate 30 (refer to FIG. 8) of the welding jig 210 to which the fixing jaw 132 is formed to fix the welding jig 210. And, it comprises a yoke groove coupling portion 133 formed on the side of the fixed block 131 and the yoke engaging groove 134 formed at the end of the yoke groove coupling portion 133. An elastic body groove 132a into which an elastic body 150 (see FIG. 8) is inserted and coupled is formed on a surface on which the yoke groove coupling part 133 of the fixed block 131 is formed. And at least one side of the yoke engaging groove 134 side of the yoke groove coupling portion 133 to prevent the yoke 130 from being separated from the yoke coupling groove 141 of the support bracket 140 to be described later A stopper 133a for protruding is formed.

7 is a perspective view of the support bracket 140 of the configuration of the welding table 100 of FIG.

As shown in FIG. 7, the support bracket 140 includes an upper bracket 140a and a lower bracket 140b having a rectangular block shape.

The upper bracket 140a has upper yoke coupling grooves 141a formed on the bottom thereof, and upper elastic grooves 142a are formed on both sides of the upper yoke coupling grooves 141a, respectively.

The lower bracket 140b has lower yoke coupling grooves 141b formed on an upper surface thereof, and lower elastic grooves 142a formed on both sides of the lower yoke coupling grooves 141b, respectively.

The upper bracket 140a and the lower bracket 140b of the above configuration are integrally coupled to each other by fasteners such as bolts to form the support bracket 140. At this time, the upper yoke coupling groove 141a and the lower yoke coupling groove 141b are coupled to form a yoke coupling groove 141 into which the yoke groove coupling portion 133 is inserted and coupled to be movable. The upper elastic groove 142a and the lower elastic groove 142b are also coupled to each other to form an elastic groove 142 into which the elastic body 150 (see FIG. 8) is inserted and fixed.

As described above, when the yoke 130 and the support bracket 140 are coupled to and mounted on the second welding rotating plate 360, the yoke 130 is fixed to the yoke 130 by the elastic body 150. The second welding rotating plate 360 receives an elastic force moving toward the center.

In the above-described configuration of the present invention, the air cylinder 110, the pivot arm 120, the yoke 130 and the support bracket 140 become the welding fixture fixture 101 of the present invention.

Hereinafter, the coupling structure of the welding table 100 will be described with reference to FIGS. 4 to 7.

As shown in FIG. 4, in each configuration of the welding table 100, the first welding rotating plate 350 may be rotated about a horizontal axis by the rotation transmitting device 144 and the first welding rotating plate supporting device 146. To be fitted.

The second welding rotating plate 360 is fixedly mounted to the center of the first welding rotating plate 350 so as to be rotated about a vertical axis.

The air cylinder 110 is fixedly attached to an upper side of the first welding rotating plate 350.

The rotating arm 120 is inserted into the rotating shaft hole 121 in a state in which it is coupled to the error cylinder shaft 111 of the air cylinder 110 through a cylinder shaft hole 123 at one end thereof. By the upper portion of the first welding rotating plate 350 is rotatably coupled around the rotating shaft (121a).

Thereafter, the lower bracket 140b is fixed to a position adjacent to a side surface of the lower support plate 30 of the welding fixture 210 among the upper surfaces of the second welding rotating plate 360.

After the lower bracket 140b is fixed to the second welding rotating plate 360, the lower bracket 140b is mounted so that the yoke groove coupling portion 133 is seated on the lower yoke coupling groove portion 141b of the upper bracket 140b. It is coupled to), one end of the elastic body 150 is coupled to the lower elastic groove (142b).

After the yoke 130 is fixed to the upper bracket 140a on the upper portion of the lower bracket 140b to which the yoke 130 and the elastic body 150 are coupled by using fasteners such as bolts, the yoke 130 has a yoke coupling groove ( The support bracket 140 is movably coupled between the 141. In this case, the cross section of the yoke defect groove 141 is formed to be wider than the cross section of the yoke groove coupling portion 130 and is formed to be smaller than the end region including the stopper 133a.

As described above, when the yoke 130 is movably coupled by the support bracket 140, the yoke catching part groove 134 formed at the end of the yoke 130 is the yoke catching part 122 of the pivot arm 120. ) Is positioned on the circumference around the center of the second welding rotary plate 360 is located. In addition, the yoke engaging portion groove 134 is inserted in a state that is not fixed to the yoke engaging portion 122.

In addition, when the yoke 130 is movably coupled by the support bracket 140, the yoke catching part groove 134 formed at the end of the yoke 130 is the yoke catching part 122 of the pivot arm 120. Is positioned on the circumference around the center of the second welding rotary plate 360 is located.

Accordingly, when the second welding rotary plate 360 is rotated, the yoke engaging portion 122 of the pivot arm 120 is inserted into the yoke engaging portion groove 134, or the insertion is released to release the second welding rotating plate ( 360 is configured to rotate freely. In addition, when the pivot arm 120 is disengaged from the yoke 130, the yoke 130 is moved by the elastic body 150 to the center of the second welding rotary plate 360 by the fixing block 131. Will be maintained.

FIG. 8 is a view showing a state in which a welding jig 210 in which the support grid 2 is fixed to the welding table 100 of FIG. 4 is mounted.

Hereinafter, a welding process of the support grid 2 using the welding device 1 and the welding table 100 will be described with reference to FIG. 8.

As shown in FIG. 8, the cylinder shaft hole 123 is rotatably coupled to the air cylinder 110 and the air cylinder shaft 111 at an upper portion of the first welding rotating plate 350, and is rotatable about the rotating shaft 121a. Rotating arm 120 is coupled to be mounted.

The yoke 130 and the support bracket 140 are on the second welding rotary plate 360 in a state in which the yoke 130 is movably supported in the yoke coupling groove 141 of the bracket 140. Is mounted.

At this time, the yoke engaging portion 121 of the pivoting arm 120 maintains the inserted state coupled to the yoke engaging portion groove 134 of the yoke 130.

Welding jig 210 including a lower support plate 30 on which the support grids 2 are connected to each other in a lattice form for welding the support grids 2 using the welding table 100 configured as described above. ) Is seated on the second welding rotating plate 360. The welding jig 210 may be automatically transferred by a crane, a conveyor, or the like to be seated at a predetermined position of the second welding rotary plate 360. At this time, the welding jig 210 is coupled to the fixing protrusion 361 protruding from the fixing groove 134 formed in the lower support plate 30 to the second welding rotating plate 360 is limited in movement.

Thereafter, the air cylinder 110 is driven to extend the air cylinder shaft 111 to rotate the pivot arm 120 about the rotation shaft 121a. When the pivot arm 120 is rotated about the rotation shaft 121a, the yoke engaging portion 122 of the pivot arm 120 moves to the welding fixture 210 while the yoke 130 moves to the welding fixture 210 side. Move it.

When the yoke 130 is moved toward the welding fixture 210 by the pivot arm 120, the fixing jaw 132 of the yoke 130 is coupled to the edge of the lower support plate 30 of the welding fixture 210. Fix the welding jig 210.

As described above, the yoke 130 rotates the first welding rotating plate 350 and the second welding rotating plate 360 while the welding jig 210 is fixed to the support grid 2 using the laser welding part 200. Welding to the intersection is performed.

At this time, the second welding rotating plate 360 is rotated within a 180 degree range in a direction away from the pivot arm 120. Therefore, when the yoke 130 and the support bracket 140 rotate in a direction away from the pivot arm 120, the yoke engaging portion 122 is separated from the yoke engaging portion groove 134.

When the pivoting arm 120 is disengaged from the yoke 130, the yoke 130 has a state in which the fixed block 131 is moved toward the center of the second welding rotating plate 360 by the elastic body 150. Since it is maintained, the welding fixture 210 is kept fixed.

By the operation of each configuration, the pivotal arm 120 does not interfere with the rotational movement of the second welding rotary plate 360, even when the pivotal arm 120 is disengaged from the yoke 130. The fixed state of the welding fixture 210 is maintained.

In addition, when the second welding rotary plate 360 is rotated in the opposite direction, the yoke engaging portion 122 is inserted into the yoke engaging portion groove 134 to be fixed and released to the lower support plate 30 of the yoke 130. To do this.

Therefore, the welding device 1 having the welding table 100 can weld the support grid 2 while freely rotating the welding table 100 about the vertical and horizontal axes.

In addition, the welding table 100 is separated from the coupling with the pivot arm 120 while the yoke 130 fixes the welding fixture 210 even when the first welding rotating plate 350 is rotated 180 degrees. The second rotating plate 360 may be rotated about a vertical axis even when the welding jig 210 faces the bottom, so that the welding jig 210 may be supported without performing the remounting of the welding jig 210 as in the related art. Allow the grid 2 to be welded at one time.

1 is a perspective view of a welding table mounted inside the welding apparatus disclosed in Korean Patent Laid-Open No. 10-2009-32770,

2 is a perspective view of a support grid welding device 1 according to an embodiment of the present invention,

3 is a perspective view of a laser welding part 200 for laser welding mounted to the welding apparatus 1 of FIG.

4 is a view of the nuclear fuel rod support grid welding table (hereinafter 'welding table' 100) mounted to the welding device 1 of FIG.

5 is a perspective view of the rotational arm 120 of the welding table 100 of FIG.

6 is a perspective view of the yoke 130 of the configuration of the welding table 100 of FIG.

7 is a perspective view of the support bracket 140 of the configuration of the welding table 100 of FIG.

FIG. 8 is a view showing a state in which a welding jig 210 in which the support grid 2 is fixed to the welding table 100 of FIG. 4 is mounted.

DESCRIPTION OF THE RELATED ART [0002]

1: welding device 2: support grid

100: welding table 110: air cylinder

120: drive arm 130: yoke

131: fixed block 132: fixed jaw

133: yoke groove coupling portion 133a: stopper

134: yoke locking groove 140: support bracket

350: first welding rotating plate 360: second welding rotating plate

200: laser welding part 210: welding jig

30: lower support plate

Claims (4)

In the nuclear fuel rod support grid welding device having a welding chamber, a welding portion and a rotational transmission device provided in the welding chamber, A first welding rotary plate rotated about a horizontal axis by the rotary transfer device; A second welding rotary plate seated at the center of the first welding rotary plate and rotated about a vertical axis; and And a welding fixture fixture configured to fix the welding fixture fixing the support grid to the second welding rotary plate so as not to be separated from the vertical direction of the second welding rotary plate without disturbing rotation about the vertical axis of the second welding rotary plate. A nuclear fuel rod support grid welding table, characterized in that the configuration. According to claim 1, The welding fixture fixture, A yoke for fixing a welding jig mounted on the second welding rotating plate; A support bracket for fixing the yoke to the left and right to move on the second welding rotating plate; Rotating arm is rotatably seated on the first welding rotating plate for moving the yoke left and right for fixing or releasing the yoke with the welding jig; And, A nuclear fuel rod support grid welding table, characterized in that it comprises a; drive unit for transmitting a rotational force to the rotational arm. The method of claim 1, wherein the support bracket, The fuel rod support grid welding table, characterized in that further comprising an elastic body for pressing the yoke in the center direction of the second welding rotary plate in the state that the yoke is coupled. A welding chamber in which one side is opened in a hollow shape; Rotational transmission device mounted in the welding chamber; And, A welding table seated in the welding chamber to support the welding fixture and rotate in a spherical shape; A welding part configured to perform welding on a support grid coupled to the welding jig in the welding chamber; And a welding fixture fixture for fixing the welding fixture to the second welding rotary plate so as not to be separated from the vertical direction of the second welding rotary plate without disturbing rotation about the vertical axis of the second welding rotary plate. A nuclear fuel rod support grid welding device characterized in that.

Images