JPH051984Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a heating device for a short-circuited ring of an induction motor rotor.

[Prior Art] Under the condition that the short-circuit ring of an induction motor rotor is to be reused, it is necessary to remove the silver solder connecting the rotor bar of the rotor and the short-circuit ring and immediately remove the short-circuit ring. Conventionally, there are two ways to heat this short-circuit ring: one is to have several people hold the burner in their hands, and the other is to fix the burner on a burner stand with the same diameter as the short-circuit ring. It was hot. In the above method, a person who heats the short circuit ring;
Several people are required to remove and hammer the silver solder, and the work must be carried out in coordination with each other. Next, in the method described above, the number of workers is smaller than in the method because the burner is fixed, but in order to uniformly heat the short-circuit ring, a device to rotate the burner mounting table is required. become. In addition, in both methods, there are many gas hoses scattered around the burner, and it was necessary to be extremely careful not to hook or tangle these gas hoses during work.

[Problems to be solved by the invention] As mentioned above, in the conventional heating method, many gas hoses are scattered, so there is a high risk of accidental burns due to carelessness, and many gas hoses also get in the way. There was a problem that uneven rotation of the annular burner occurred, which hindered uniform heating.

[Means for Solving the Problems] The induction transmission rotor short-circuit ring heating device according to the present invention has a plurality of heating devices arranged along a semicircular conduit divided into two halves formed in an annular shape as a whole. A crater branch pipe bent into an L-shape is provided so as to be freely pivotable, and is attached to guide rods on both the left and right sides that are freely rotatably erected on a pedestal via a mixed gas conduit connected to a circular conduit so as to be height-adjustable. It is something.

[Operation] In the heating device according to the present invention, gas hoses are respectively connected to the mixed gas conduits of the annular burners installed below the short-circuit ring of the induction motor rotor. The gas hoses are further connected to guide rods to keep them organized. When one worker holds one guide rod and rotates it repeatedly, the crater branch pipe adjusted to the diameter of the short circuit ring repeatedly rotates and uniformly heats the short circuit ring. Furthermore, even if the diameter of the short-circuit ring changes, each crater branch pipe can be arranged on the same circumference by adjusting it by turning it on the semicircular ring conduit.

[Example] Hereinafter, an example of the present invention will be described with reference to the drawings.
FIG. 1 is a perspective view showing an embodiment of the present invention, FIG. 2 is a plan view of an annular burner, and FIG. 3 is a front view thereof. In these figures, reference numeral 1 denotes a short circuit ring of an induction motor rotor to which a large number of rotor bars 2 are fixed by silver brazing, and is vertically installed on a pedestal 4 with a shaft 3. Reference numeral 5 denotes an annular burner installed below the short-circuit ring 1 to heat it, and is composed of a split semi-circular ring conduit 6 so as to surround the shaft 3 from both left and right sides. That is, this annular burner 5 has a semi-circular conduit 6 divided into left and right halves as shown in the figure, a mixed gas conduit 7 connected to each semi-circular conduit 6, and a gas conduit 7 along the semi-circular conduit 6. It consists of a plurality of L-shaped crater branch pipes 8 that are rotatably provided above it. Reference numeral 9 denotes a bearing provided on the pedestal 4, and an inner race 10 thereof is fixed to the pedestal 4. The shaft 3 of the induction motor rotor is connected to the inner race 1 of this bearing 9.
It is placed inside 0 and erected. The outer race 11 of the bearing 9 rotates freely, and a pair of left and right bent guide rods 12 are fixed and erected on the outer race 11. The semicircular ring conduits 6 are each mounted on a support ring 13 having a similar shape, and a cylindrical body 14 is provided at the base end of the support ring 13. Fix it in the appropriate position. Further, each crater branch pipe 8 is rotated on the semicircular ring conduit 6, and the diameter is adjusted so that the diameter when many crater points are connected on the circumference becomes the same diameter as the short circuit ring 1. The diameter D is the adjustable range of the crater branch pipe 8. Each crater branch pipe 8 is connected to the semicircular ring conduit 6 via a union joint 8a. In addition, the semicircular ring conduit 6 also has the union joint 1.
This is convenient because the diameter of the annular burner 5 can be made variable by configuring it so that it can be supplemented through the annular burner 5. In this way, the annular burner 5 is installed below the short-circuit ring 1, and the propane gas hose 17 and the oxygen gas hose 18 are connected to the mixed gas conduit 7 of the annular burner 5 with a check valve 19 and a regulating valve 20, respectively.
The mixed gas conduit 7 is connected to the blender at the proximal end thereof through the gas conduit 7, and the gas hoses are connected to the guide rod 12 and arranged in order. In the figure, 22 is a union joint for the mixed gas conduit 7.

In this embodiment, one worker A holds one side of the guide rod 12 and rotates it repeatedly at an appropriate angle to move the short-circuit ring 1 of the induction motor rotor to the annular burner 5.
Heat by. The other worker B is engaged in removing the silver solder from the rotor bar 2.

[Effects of the invention] As described above, according to the invention, the short-circuit ring of the induction motor rotor can be fixed by the annular burner constructed by rotatably providing the crater branch pipe in the semi-circular conduit divided into two. The annular burner can uniformly heat the short ring by one worker's repeated rotation of the guide rod. Further, the number of workers required is at least two who are engaged in repeatedly rotating the guide rod and removing the silver solder from the rotor bar, which is extremely labor-saving. Moreover, since the gas hose is connected to the guide rod and arranged in an orderly manner, it does not get in the way and is safe from damage. Furthermore, even if the diameter of the short circuit ring changes, it can be dealt with immediately.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an embodiment of the present invention, FIG. 2 is a plan view of an annular burner, and FIG. 3 is a front view thereof. 1... Short circuit ring, 4... Frame, 5... Circular burner, 7... Mixed gas conduit, 8... Crater branch pipe, 12
...Guide rod.

Claims (1)

[Scope of utility model registration request] A semicircular ring conduit is connected to the tip of each mixed gas conduit, and a plurality of L-shaped crater branch pipes are rotatably provided along the semicircular ring pipe, and the semicircular pipe having the crater branch pipes is An induction motor rotor short-circuit ring comprising ring conduits arranged opposite each other to form a ring burner, and the ring burner being height-adjustably attached to a pair of guide rods rotatably erected on a stand. heating device.