JPS63166459A - Heat-treatment apparatus - Google Patents

Abstract

PURPOSE:To eliminate the effect of discharge and to make an inexpensive and durable metal usable, by a method wherein a truck, a rail, a wheel or the like are provided outside a furnace performing microwave heating so as to be joined to the door of the furnace. CONSTITUTION:The door 25 mounted to the front surface of a furnace 24 is integrally fixed to a truck 26 and a support 27 supporting a fixing element 5 is mounted to the inner surface of the door 25. Metal wheels 11 are mounted to the truck 26 and arranged on rails 12 similarly made of a metal to allow the truck 26 to run and move on the rails 12. Since the truck 26, the rails 12 or the like are provided outside the furnace and the leakage of a microwave is prevented by the leakage preventing contact element 23 between the furnace 24 and the front surface door 25, danger for generating discharge is reduced. Further, since the wheels 11, the rails 12 or the like are made of a metal, abrasion is reduced and durability is enhanced.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention provides a heat treatment device that uses microwaves as a heating source for preliminary instant heating before Q+ varnish treatment of electrical machinery windings, etc., and during varnish drying after varnish impregnation. [Conventional O) Technology] In general, electrical machinery windings are impregnated with varnish and hardened, and enamelled wire is used for winding in order to improve insulation properties, vibration resistance, and durability. It is necessary to secure the space between each other and insulating paper, etc.

Usually, before impregnating with varnish, 100%
Heat to ~150°C. The temperature at which impregnated varnish is dried is 100 to 150°C, and a hot air circulating oven is normally used as the heating device for these.

In this case, the components of the device are not susceptible to localized abnormal heating.

However, when microwaves are used as heating energy during such heat treatment, electrical discharge occurs in the wheels and rails of the cart on which the electric windings are mounted, causing abnormal heating and sparks from the electrical discharge to the varnish Q+. - There is a risk of one bar catching fire. Next, this phenomenon will be explained.

FIG. 8 shows a heating device using microwaves as heating energy. In this device, a microwave oscillator (1
) is activated and the microwave generated is transferred to the waveguide (3)ζζ
Eζ is introduced into the furnace (2). In the furnace (2), the stirrer fan (4) is rotated to uniformly disperse the introduced microwaves, so that the core (6), coil (7) and lead wires that make up the stator (5) of the rotating electrical machine are (8) σ)
Microwaves must be applied to the i-plane from various directions. At this time, in the conductor parts of the core (6) and coil (7), there is a very thin surface layer. Micro U surface current flows and Joule heat is generated. Then, this heat is transferred to the wound enameled wire (O) coating, removing strain, and the heat from this wire impregnates the T.
Let the varnish dry. In this way, it is heated mainly by Joule heat, but since the enameled wire coating itself and the varnish itself also generate heat internally due to the dielectric heat phenomenon based on the microwave electric field, it is natural to remove distortion and remove the varnish. Contributes to dryness. The microwave electric field also applies to the platform αQ, wheels α, and seats 11102, etc. that make up the trolley (9), and especially when the wheels αυ and the rails a2 are made of metal, there is a slight gap between them. Therefore, one or both of these contact members must be insulated. Of course, the core (6) and the stand αQa)rIII must be covered with an insulating plate (to).

Therefore, since the wheels αD of the truck (9) must be made of an insulating material such as synthetic resin, the wheels αC are subject to significant wear and must be replaced periodically.

For this reason, such wheels are made of strong materials O) Heat treatment equipment that requires less maintenance due to the use of wheels O)
The provision is strongly requested by Consumer I.

Therefore, the inventors decided to improve this problem as shown in Figures 3 to 5. (see application)].

That is, FIG. 8 is a sectional view, FIG. 4 is a sectional view showing a side surface, and FIG. 5 is an enlarged gamma cross-sectional view of section A in FIGS. 8 and 4.

In Figures 4 and 5, the groove αQ between the furnace wall and the trolley (
9) are provided on the side and rear surfaces. As for the front surface, the structure is shown in which the front surface jiaB and the truck (9) are integrated. In this case, gaps and grooves aQ are not provided, but if the structure is not an integrated structure, they should be provided around the entire circumference. Hereafter 0) Gear...
The grooves and grooves are called a chi-influence structure.

Referring to Figure 6, the structure of the chip structure Q) will be explained. First, the groove member α is mounted on the stand α0, and the contact surface of the aS is coated with conductive paint and fixed with screws (E). Due to this, a gear valve αG and a groove (A) are formed between the furnace wall α4 and the furnace wall α4.

Furnace wall and O) Gear knob αQ is the rail (2) of the trolley (9)
Although the dimension (d) is regulated to be constant, it can also be regulated by installing a gamma insulating guide a made of resin or the like. Further, the rear part is regulated by a stopper Qη.

The dimensions of a-y f are determined so that when microwaves enter the gear knob Q6 and the groove, the phase shifts by 180° within the groove. In other words, the intruding microwave (a) will be canceled by the reflected microwave (b). The strength of the microwave electric field penetrating the gap 00 can be suppressed to several percent or less.

π Shown here:
Attach 9 to the trolley side (π is on the furnace wall α4 side) n
You can also attach it. Similarly, the insulating guide αl may also be attached to the furnace wall side.

Depending on the structure of the furnace, such as a continuous furnace, a microwave leakage prevention contact with spring properties (see Figure 7) may be installed on the trolley or on the furnace wall (71 front or rear side). In some cases, it may be better to use a double-sided structure.In other words, a non-contact contact structure is preferable since the side surfaces are worn out when the cart moves.Since the front and rear surfaces are pressed against each other, there is no damage to the contacts.

[Problems that the invention attempts to solve]

By the way, 2I shown in FIGS. 8 to 7]! As described above, the device is configured to provide a groove αG between the platform aO of the cart (9) and the inner wall ♂ of the furnace (2), and to block the microwave electric field passing through it. - There are problems such as the complicated structure and time-consuming manufacturing and assembly.

This invention has been made all at once to solve the above problem (O), and to provide a heat treatment device that does not have the influence of microwaves on the wheels or rails and is easy to manufacture and assemble. It is an object.

(:l!l Means for solving the problem) The instant heat treatment apparatus according to the present invention includes a furnace that houses an object to be heated that is heated by microwaves, and a support that supports the object to be heated. A door that closes a part of the furnace, a leak-preventing contact between the door and the furnace, and a trolley that runs on the outside of the furnace (7 loops) to which the door is attached are installed. It's one thing.

[Effect]

The heat treatment apparatus according to the present invention is a trolley that has the risk of causing electrical discharge in a furnace that performs microwave heat treatment.

By installing the rails and wheels outside the furnace, they will not be affected by electrical discharge.

[Embodiments of the invention]

Hereinafter, one embodiment of this invention will be explained with reference to FIGS. 1 and 2. t2°(IO2) to (3)(11)02 are exactly the same as the above-mentioned conventional device. (Foundation) is a furnace, and the front door (E) of this furnace (C) is attached and fixed to a trolley (E), making it an integral structure. (2) is attached to the front door (to) above,
e@, which is a support for the stator (5), is a leak-preventing contact, which is installed on the front of the furnace (■) and between the front door (@ and O) of the furnace (to). Prevents circular microwave Q+ leakage. Wheels αυ made of metal are mounted on the above-mentioned trolley handle.
is mounted and supported, and Cζ is disposed on a rail (2) made of a metal material in the same way, and it travels on a cart (E) or on the rail @.

In the heat treatment equipment E, which is configured as described above, the trolley (to), rail (2), etc. that are at risk of causing lightning strikes are placed outside the furnace in which microwave heating is performed. 1) Since microwave O) leakage is prevented by the furnace (goods) and front door - O) curved leakage prevention contact @, the trolley (E) and rails (2) are made of metal, Even if there is a slight gap between them, the risk of discharge occurring is extremely small.

In the embodiment described above, the sub-leakproof contact @ is provided on the furnace @ side, but it may also be provided on the front door (support) side and the same Q+ effect as in the above embodiment is obtained.

〔Effect of the invention〕

ζO) According to the invention, trolleys, rails, wheels, etc. that are at risk of causing electrical discharge are installed outside the furnace, so it is difficult to assemble.

In terms of production, V4 can be easily created and there is no danger of releasing WMQ1. Therefore, since metal can be used for the structural members, it is inexpensive, durable, and other effects.

[Brief explanation of the drawing]

Figures 1 and 2 show an embodiment of this invention.
Figure 1 is a front cross-sectional view of the heating tin M-O), Figure 2 is a side cross-sectional view, and Figures 8 to 8 show a conventional 17) 21D heat treatment apparatus, and Figure 8 is a front view of the heat treatment apparatus T71Fr side. , FIG. 4 is a cross-sectional side view, FIG. 6 is a partially enlarged Ij7kIIIo view of part A in FIG. FIG. 7 is a front sectional view, FIG. 7 is a side sectional view, and FIG. 8 is a schematic diagram showing a 1i0 heating device using microwaves. In the figure, Ql) is a wheel, ■ is a rail, q is a leakage prevention contact, (goods) is a furnace, (to) is an n'h door, ω is a trolley, and (a) is a support. In addition, in the figures, the same reference numerals indicate the same or corresponding parts.

Claims (3)

[Claims] (1) A furnace that houses an object to be heated by microwaves, a door that has a support that supports the object and that partially blocks the furnace, and a door that is installed between the door and the furnace. 1. A heat treatment apparatus comprising: a leak-preventing contact; and a trolley to which the door is mounted and which travels on a rail outside the furnace. (2) The heat treatment apparatus according to claim 1, characterized in that a leakage prevention contact is provided on the cart side. (3) The heat treatment apparatus according to claim 1, characterized in that a leak-preventing contactor is provided on the furnace wall side.