JPH0433363Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field This invention is a product that combines the integration and rotation necessary to automatically weld two upper and lower parts of a partition plate stationary vane, which consists of a semicircular upper half and a lower half. Regarding body centering jig,
It is used in technical fields to improve the efficiency of welding work.

Conventional Technology Conventionally, the partition plate stator vanes were automatically welded individually while keeping the semicircular upper and lower half shapes.
That is, conventionally, the inner and outer rings of the partition plate stator vanes and the front and back surfaces of the shroud (steam inlet and outlet sides) were automatically welded by placing them on a turntable and performing downward welding.

Problems to be Solved by the Invention According to the conventional method, since welding distortion occurs, a reversing operation to prevent distortion and a pressing operation to correct distortion are performed. Here, the present invention aims to prevent this welding distortion from occurring by making the upper and lower halves of the workpiece of the partition plate stator vane circular, which is a key point in developing a device that continuously automatically welds four places on the front and back sides at the same time. To provide a jig that can be integrated into an axis of a rotating body and has the function of an axis.

Means for Solving the Problems The present invention employs the following means to solve the above-mentioned problems. In other words, it is an integrated welding jig used for automatic welding of a partition plate stator vane half work consisting of an inner ring, a blade and shroud assembly, and an outer ring. A spacer extending across the diameter of the flange is provided in the center, the spacer of one flange is provided with a hole at its axis, and the spacer of the other flange is provided with a boss that fits into the hole; Above and below the spacer,
A welding jig for integrating partition plate and stator blades, in which a centering spacer that fits into the cutout of the inner ring is attached, and the upper and lower halves of the partition plate stator blade are sandwiched and fixed between the pair of flanges. shall be.

Embodiment Next, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1a is a front view of the upper half of a typical partition plate stationary blade, and FIG. 1b is a view taken along the line bb in FIG. 1a, showing the welding area and its shape. FIG. 1c is a view taken along the line c--c in FIG. 1b.

In FIG. 1a, the upper and lower halves of the partition plate stationary blades are each semicircular, and the inside of the inner ring 1 (range indicated by radius R) is cut out in a substantially semicircular shape. Reference numeral 5 indicates a reinforcing portion, which is eventually separated. In addition, L indicates the extra length, and the 1st b
Arrow A in Figures 1c and 1c indicates the flow direction of steam to the partition plate stationary vanes.

On the outer periphery of such an inner ring 1, an assembly of a large number of blades 4 and inner and outer shrouds 3, and an outer ring 2 on the outer periphery are welded and integrated as shown by the symbol w in FIG. 1b, It is assembled into a steam turbine.

The jig of the present invention used for this integrated welding was
This will be explained with reference to FIGS. 2b, 2b, and 3.

This jig is used for the inner rings 1 and 1 of the upper and lower halves of the partition plate stator vanes.
a pair of substantially circular flanges 7,7 abutting the
is the main component. These flanges are each attached to the pipe shaft 6 at its axis.

A spacer 9 is provided at the center of the inside of both flanges 7, 7.
extends across the diameter of the flange. The spacer 9 of one flange is provided with a hole at the axis of the flange, and the spacer 9 of the other flange is provided with a boss 10 in the center thereof which fits into the hole. Furthermore, on the inside of both flanges, there is a centering spacer 8 having a shape corresponding to the semicircular cutout of the inner ring 1 described above.
It is attached at a position corresponding to this cutout.
The thickness of this centering spacer 8 is approximately 1/3 of the thickness of the inner ring 1, as shown in FIG.

Reference numeral 13 indicates a bolt hole for connecting the spacers 9, and reference numeral 12 indicates a bolt hole for integrating the jig.

Further, the relative position of the flanged pipe shaft 6 with respect to the flange 7 on the right side of FIG. 2a can be adjusted by an adjustment bolt 11 attached to an adjustment bolt hole 14.

Now, automatic welding of partition plate stator vanes using such an integrated jig will be briefly described below.

The inner ring 1 with the reinforcing part 5, the assembly of the shroud 3 and the blade 4, the stator blade upper half workpiece formed by temporarily attaching the outer ring, and the similar stator blade lower half workpiece are both inserted into the cutout part of the inner ring 1. It is fitted into the centering spacer 8 of the flanges 7, 7, and the boss 10 is fitted into the axial hole of the spacer 9, thereby sandwiching it from both sides. This state is the state shown in FIG.
At this time, since the bolt holes 12 and 13 are aligned for both flanges, bolts are fastened to these bolt holes to integrate the upper and lower halves of the work with the flanges 7, 7. In this state, while rotating around the pipe shaft 6, as shown in FIG.
The parts are automatically welded. If you do this,
The upper and lower halves of the partition plate stator blade are automatically welded all at once.

Effects of the invention According to the integrated welding jig of the invention, it is possible to automatically weld the inner and outer rings of the partition plate stationary vane at four locations simultaneously on the front and back sides, and a) the welding distortion that occurs when welding on one side is completely eliminated.

b. The reversal work and the press work to correct distortion, which were performed to prevent welding distortion, will be completely eliminated.

c) Since it is possible to weld at four locations simultaneously, the upper and lower halves, it is more efficient than conventional methods.

Great effects such as this can be obtained.

[Brief explanation of the drawing]

Figure 1 shows the typical shape of the partition plate stator vane.
Figure a is a front view, Figure 1b is b-b of Figure 1a.
Figure 1c is a view taken along line c-c in Figure 1b, Figure 2a is a partially cutaway side view of the jig of the present invention, and Figure 2b is b-b in Figure 2a. 3 is a partially broken side view of the jig during welding. 1...Inner ring, 2...Outer ring, 3...Shroud,
4...Blade, 5...Reinforcement part, 6...Pipe shaft, 7...Flange, 8...Centering spacer, 9...Spacer, 10...Boss, 11...Adjustment bolt, 12...Bolt hole , 13...Bolt hole, 14...Adjustment bolt hole, w...Welding part.

Claims (1)

[Scope of utility model registration request] This is an integrated welding jig used for automatic welding of a partition plate stator vane half work consisting of an inner ring, a blade and shroud assembly, and an outer ring. ,
A spacer extending across the diameter of the flange is provided, the spacer of one flange is provided with a hole at the flange axis, the spacer of the other flange is provided with a boss that fits into the hole, and the spacer of the spacer is provided with a hole that fits in the hole. A partition plate stator blade in which centering spacers that fit into the cutout portions of the inner ring are attached to the upper and lower parts, and the partition plate stator blade upper and lower half works are sandwiched and fixed between the pair of flanges. Integrated welding jig.