JPS629519Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an apparatus for continuously measuring the temperature of a heated object in an external heating rotary furnace.

Accurately knowing the temperature of a heated object at any location in an externally heated rotary furnace is extremely important for product quality control, but there has been no good method to date.

For example, when measuring temperature by inserting a thermocouple from outside the inlet or outlet hood of a rotary furnace, the measurable distance from the furnace end is approximately 3 to 4 mm due to work constraints.
m is the limit. Also, as in the conventional device of this kind illustrated in FIGS. 1 and 2, a pipe 3 is slidably supported on the central axis of the rotary furnace 1 by a strut 2, and a thermocouple 4 is inserted into the pipe 3. Suspended from multiple points,
When measuring the temperature of the heated object 5, the measurement point is fixed, so in order to know the temperature distribution it is necessary to install many thermocouples, and the device must be constantly exposed to a high temperature furnace. Therefore, the thermocouple has a short lifespan, and because the thermocouple is flexible for installation reasons, it is difficult for the tip of the thermocouple to sink into the heated object, resulting in problems such as being able to measure only the surface temperature of the heated object. Ta.

This invention eliminates these conventional problems and
The temperature of the object to be heated in the external heating type rotary furnace is continuously measured.An embodiment of the present invention will be described below in detail with reference to the drawings.

FIG. 3 is a conceptual diagram showing an embodiment of the temperature measuring device of the present invention, and FIG. 4 is a sectional view thereof. As shown in the figure, the main wire rope 6 is passed through the furnace 1 in the axial direction so as not to touch the furnace wall and the object to be heated 5 of the external heating type rotary furnace 1, and as shown in FIG. For example, one end of the main wire rope 6 is connected to a fixing device 9a provided outside the outlet hood 7 of the furnace 1 so that it is set under tension directly above the center of the heating object 5, and the other end is connected to the furnace 1. It is connected via a tension gauge 9d to a fixing device 9b and a tensioning device 9c provided outside the entrance hood 8, and these supports 9 tension the main wire rope 6 so that it does not slacken.

Next, a thermocouple 4 as a temperature measuring section is suspended from the main wire rope 6 by a holder 10. As shown in FIG. 5, this holder 10 has a sleeve 10a through which the main wire rope 6 is passed, and an auxiliary wire rope 11 fixed thereto, and which is fixed at right angles to this sleeve 10a and has a thermocouple 4 and a compensating conductor 12 passed through it. The thermocouple 4 hangs down under the weight of the pipe 10b, and the tip of the thermocouple 4 protruding from the tip of the pipe 10b is immersed in the heated object 5.

The compensating conductor 12 is suspended from the main wire rope 6 by a large number of hangers 13 fixed at regular intervals, and passes through a winding drum 14 outside the furnace to a thermometer 15.
It is connected to the.

On the other hand, the auxiliary wire rope 11 for moving the thermocouple is connected endlessly via a pulley 16a and a reel 16b installed outside the furnace, and the reel 16b is connected to the drive device 1.
It is connected to 6. The drive device 16 is also mechanically or electrically connected to an indicator 17 that indicates the position of the thermocouple 4. In addition, the main wire rope 6, the auxiliary wire rope 11, and the holder 1 are exposed to the high temperature inside the furnace.
0, compensation conductor 12, and hanger 13 are all 600~
By using a heat-resistant material that can withstand 700°C, the temperature of the heated object 5 can be measured up to about 1000°C. In addition, the main wire rope 6 and the auxiliary wire rope 11 may be made of a heat-resistant steel chain. In such a configuration, when determining the temperature of the object to be heated 5, first the tension is The main wire rope 6 is tensioned by the tensioning device 9c so that the total of 17 becomes a predetermined instruction. Next, the reel 16b is rotated by the drive device 16 so that the position indicator 17 indicates the desired position, and the holder 10 is moved by the auxiliary wire rope 11. When the tip of the thermocouple 4 sinks into the object to be heated 5 due to the weight of the holder 10, the thermometer 1
Measure the temperature at step 5. Thereafter, by moving the thermocouple 4 to a desired position in a similar manner, the temperature of the object to be heated 5 at any position is continuously measured.
Furthermore, by moving the thermocouple 4 out of the furnace after the measurement is completed and loosening the tension of the main wire rope 6 a little, the life of the device can be extended.

As explained in detail above, according to the present invention, 1
It is possible to accurately measure the temperature of the object to be heated at any location in the external heating rotary furnace at any time using a single thermocouple, and there is no need to modify the rotary furnace, so it can be easily installed in an existing furnace. Furthermore, there is an effect that maintenance such as replacing thermocouples becomes easier.

[Brief explanation of the drawing]

Fig. 1 is a conceptual diagram showing a conventional temperature measurement device for a heated object in a rotary furnace, Fig. 2 is a sectional view taken along line A-A in Fig. 1, and Fig. 3 is a temperature measurement device for a heated object in a rotary furnace according to the present invention. A conceptual diagram showing one embodiment of the device, FIG. 4 is a sectional view thereof, and FIG. 5 is a detailed perspective view of the holder. DESCRIPTION OF SYMBOLS 1...External heating chamber rotary furnace, 4...Thermocouple, 5...Heated object, 6...Main wire rope, 10...Holder, 11...Auxiliary wire rope, 15...Thermometer, 16... ...Drive device.

Claims (1)

[Scope of utility model registration request] A main wire rope that penetrates the inside of an externally heated rotary furnace and is tension-connected via a support outside the furnace; a holder that is suspended from the main wire rope and that immerses a temperature measurement part into an object to be heated in the furnace; A rotary furnace comprising: an auxiliary wire rope that locks the holder and is movably attached to the main wire rope; and a drive device that moves the holder via the auxiliary wire rope. Temperature measuring device for heated objects.