JPH0143233B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a temperature measuring device in a furnace having a conveying device used to measure the temperature of a product in a furnace having a conveying device for carrying products to be heated into and out of the furnace. It is something.

In furnaces such as aluminum vacuum brazing furnaces and vacuum heat treatment furnaces, product temperature control plays an important role. Further, in such a furnace, a conveying device is provided in the furnace in order to carry the product into and out of the furnace.

An example of a conventional temperature measuring device in a furnace having such a transfer device will be explained with reference to FIG. 1. A heating chamber 2 is provided in a furnace body 1, and There is a frame 4 at the bottom of the carrier 3, which is installed so that it can be moved inside and out.
is attached to place the product 5 to be heated.

When measuring the temperature of the product 5, the product 5 is carried into the heating chamber 2 by the carrier 3, and then the thermocouple 7 connected to the temperature measuring instrument 6 is inserted through the furnace body 1 and the heating chamber 2. Then, an operator enters the heating chamber 2 and attaches the temperature measuring contact 8 of the thermocouple 7 to the temperature measuring point of the product 5.

In this way, in the conventional apparatus shown in FIG.
It takes time and effort to install the product, and also requires a space for a person to enter between the inner surface of the heating chamber 2 and the product 5. Therefore, the heating chamber 2 must be considerably larger than the size of the product 5;
The disadvantage is that equipment costs are high.

Furthermore, since the operator can enter the heating chamber 2 only when the inside is cold, it is not possible to measure the temperature of the product 5 during continuous operation of the furnace. In addition, recently, as the quality of the product 5 has improved, temperature control in furnaces has become stricter. However, in the apparatus shown in FIG. 1, the temperature of the space between the product 5 and the inner surface of the heating chamber 2 does not necessarily match the temperature of the product 5.
There is a drawback that the accurate temperature of the product 5 itself cannot be measured with high precision.

Another example of a temperature measuring device in a furnace having a conventionally used conveying device will be explained with reference to FIG. Carrier 3 is installed so that it can be moved inside and outside. A frame 4 is attached to the lower part of the carrier 3, on which a product 5 to be heated is placed. A thermocouple concentration device 9, a transmitter 10, a transmitting antenna 11, and a battery 12 are attached to the upper side of the carrier 3.
A thermocouple 7 is connected to the thermocouple concentration device 9 . On the other hand, a receiving antenna 13 is located outside the furnace body 1.
and a receiving instrument 14 are installed.

In the device shown in FIG.
1. The battery 12 will move together with the carrier 3. When measuring the temperature of the product 5 with this device, move the carrier 3 outside the furnace body 1, place the product 5 on the frame 4, and at the same time connect the temperature measuring junction 8 of the thermocouple 7 to the temperature of the product 5. Install it in a warm place. Then, when the carrier 3 is moved into the furnace body 1 and the product 5 is heated in the heating chamber 2, the temperature of the product 5 measured by the thermocouple 7 is determined by the thermocouple concentration device 9, the transmitter 1
0, it is transmitted as a wireless signal to the receiving antenna 13 via the transmitting antenna 11, and is converted into temperature by the receiving meter 14 and displayed.

In the conventional apparatus shown in FIG. 2, the work of attaching the temperature measuring junction 8 of the thermocouple 7 to the product 5 is done outside the furnace body 1, so there is no need for the operator to enter the heating chamber 2, However, the ambient temperature of the transmitter 10 is limited to 150° C. or less, and the receiving instrument 14 requires the use of special and expensive equipment.

The present invention aims to improve these conventional drawbacks, to perform the thermocouple installation work outside the furnace, and to automatically measure the product temperature without using wireless communication while the furnace is in continuous operation. A carrier that transports the product to be heated inside and outside the furnace body, a pin attached to this carrier, and one end connected to the pin and the other end attached to the part of the product where the temperature is to be measured. a thermocouple; a socket mounted on the furnace body for mating connection with the pin;
The present invention relates to a temperature measuring device in a furnace, which has a conveying device equipped with a temperature measuring instrument provided outside the furnace body and a lead wire connecting the socket and the temperature measuring instrument.

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 3 is a plan view of the furnace, in which the furnace 20 has an inlet door 21 and an outlet door 22;
An inlet traverser 23 is provided outside the door 1 , and an exit traverser 24 is provided outside the exit door 22 . When a product placed on a frame attached to a carrier (to be described later) is suspended from the entrance traverser 23 and transported to the front of the entrance door 21, a cylinder device moves the product to the entrance door 2.
1 is opened. The chemicals are transferred to the furnace body 20 by the carrier.
After being carried into the interior, the entrance door 21 is closed.
Then, the inside of the furnace body 20 is evacuated to perform heat treatment on the product, and at this time, the temperature of the product is measured. When the heat treatment of the product is completed, the exit door 22 is opened by the cylinder device, the product is transported from the furnace body 20 to the exit traverser 24 by the carrier, and the exit door 22 is closed. The exit traverser 24 loaded with products moves to a product storage area, and the products are unloaded from the exit traverser 24.

Inside the furnace body 20, there is a heating chamber 25 as shown in FIG.
A carrier 27 is suspended so that it can move in and out of the furnace body 20 and the heating chamber 25. The frame 2 is attached to the lower part of the carrier 27 via a hanger 28.
9 is attached for placing the product 5 to be heated.

A pin mounting seat bracket 30 is fixed to the side surface of the carrier 27, and a pin mounting seat 3 is mounted on the bracket 30.
1 is placed. Pin mounting bracket 30
As shown in Fig. 5, the pin mounting seat 31 is sandwiched between the two in the direction of movement of the carrier 27 (see Fig. 4).
A guide shaft 3 is fixed between the pin mounting seat 31 and the bracket 32.
3 and a spring 34 are inserted. As a result, the pin mounting seat 31 is supported so as to be able to slide on the pin mounting seat bracket 30 in parallel to the moving direction of the carrier 27.

A protrusion 35 is provided at the center of the pin mounting seat 31, and a vertical guide hole 36 is bored in the protrusion 35. The upper portion of the guide hole 36 forms an enlarged portion 37 that widens upward, as shown in FIG. Near the periphery of the pin mounting seat 31, a thick lower guide pin 38 and a thin pin 39 are vertically fixed. The pin 39 extends below the lower surface of the pin mounting seat 31, and a pair of thermocouples 40 are connected thereto as shown in FIGS. 4 and 5.

As shown in FIG. 4, a cylinder mounting seat 41 is airtightly mounted on the upper part of the furnace body 20, and a cylinder 42 is provided thereon. A socket mounting seat 44 is fixed to the lower end of the piston rod 43 of the cylinder 42. As shown in FIG. 6, a socket 45 made of elastic cylindrical metal is embedded in the socket mounting seat 44.
The lead wire 46 connected to the socket 45 is
As shown in FIG. 4, it is connected to a temperature measuring instrument 47 provided outside the furnace body 20. As shown in FIG. 6, a socket protection pin 48 is vertically protruded from the bottom surface of the cylinder 42, and a socket protection pin 48 is provided to protect the socket 45.
is fitted. This is to prevent evaporated matter from inside the furnace body 20 (see FIG. 4) from adhering to the inner surface of the socket 45.

A main guide pin 49 is vertically fixed to the center of the socket mounting seat 44 so as to face downward. The thickness of the main guide pin 49 is the same as that of the pin mounting seat 31 described above.
The main guide pin 49 is dimensioned to fit tightly into the guide hole 36 of the main guide pin 49, and the main guide pin 49 has a tapered portion 50 (see FIG. 6) near the lower end. Further, as shown in FIG. 6, an upper sub-guide pin 51 is vertically protruded from the lower surface of the cylinder 42.
It fits into the hole 52 of the socket mounting seat 44. The upper secondary guide pin 51 prevents the socket mounting seat 44 from rotating, and the thickness of the upper secondary guide pin 51 is as follows.
The lower guide pin 38 on the pin mounting seat 31 side mentioned above
It has become the same thickness. Further, enlarged portions 53 and 54 are formed at the upper and lower portions of the hole 52, respectively.

When the vertical center line of the pin mounting seat 31 and the vertical center line of the socket mounting seat 44 are aligned, the center line of the main guide pin 49 and the guide hole 3 are aligned.
The center line of 6 is on one vertical line, the center line of upper sub guide pin 51 and the center line of lower guide pin 38 are on one vertical line, and the center line of socket protection pin 48 and the center line of pin 39 are on one vertical line. are also arranged on one vertical line.

In the above-mentioned installation, the temperature measuring contact 55 (see FIG. 4) of the thermocouple 40 is attached to the product 5 placed on the frame 29 outside the furnace body 1. In this state, the carrier 27 is moved into the furnace body 20 by a carrier drive device (not shown). The carrier 27 is automatically stopped at the position where the pin mounting seat 31 is directly below the socket mounting seat 44.

Next, the cylinder 42 attached to the furnace body 20
is activated, and the piston rod 43 is vertically lowered. Along with this, the socket mounting seat 44 and the main guide pin 49 also descend, the socket 45 slides downward against the socket protection pin 48, and the hole 52 shown in FIG. and slide downward.

Even if the stop position of the Carrier 27 is slightly out of order,
As the main guide pin 49 descends, the taper 5
0 and the expanded portion 37, the pin mounting seat 31 slides on the pin mounting seat bracket 30, and by fitting the main guide pin 49 into the guide hole 36, the pin mounting seat 31 slides on the pin mounting seat bracket 30. The vertical centerline of the socket 44 coincides with the vertical centerline of the socket mounting seat 44. In this state, the hole 52 of the socket mounting seat 44 comes out of the upper sub-guide pin 51, then fits into the lower guide pin 38, and descends while being prevented from rotating by the lower guide pin 38. As a result, the socket 45 comes out of the socket protection pin 48 and fits into the pin 39. In this state, the thermocouple 40 is connected to a temperature measuring instrument 47 (see FIG. 4) via the pin 39, socket 45, and lead wire 46, and the temperature of the product 5 is measured by the temperature measuring instrument 47. be able to.

When the heat treatment for the product 5 is completed, the cylinder 42 is activated to raise the piston rod 43 and the socket mounting seat 44 to the state shown in FIGS. 4 and 6, and then the carrier 27 is moved to remove the product 5.
is carried out of the furnace body 20.

The present invention having the configuration as described above has the following effects.

(i) Thermocouples are attached to the product while the product is outside the furnace, and then the product is brought into the furnace, making thermocouple installation easier.

(ii) Product temperature can be measured while the furnace is in continuous operation without cooling.

(iii) Since the thermocouple signal can be taken out of the furnace via a lead wire instead of wirelessly, there is no need to install wireless equipment inside the furnace that is restricted by high temperatures.
No need to use expensive equipment.

[Brief explanation of drawings]

1 and 2 are longitudinal sectional views of a conventional device, FIG. 3 is a plan view of a furnace using the present invention, and FIG. FIG. 5 is an enlarged sectional view of FIG. 4, and FIG. 6 is an enlarged sectional view of the main part of FIG. 4. 5 is the product, 20 is the furnace body, 27 is the carrier, 39
40 is a pin, 40 is a thermocouple, 45 is a socket, 46 is a lead wire, and 47 is a temperature measuring instrument.

Claims (1)

[Claims] 1 A pin attached to a carrier that transports the product to be heated inside and outside the furnace body, a thermocouple whose one end is connected to the pin and the other end is attached to the part of the product where the temperature is to be measured, and a thermocouple fitted with the pin. A socket detachably attached to the furnace body so as to be able to be connected together, a temperature measuring instrument provided outside the furnace body, and a lead wire connecting the socket and the temperature measuring instrument. A temperature measuring device in a furnace having a conveying device characterized by: