JPS622480Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a heat shield attachment/detachment device for a detection device that optically measures the temperature, length, position, etc. of an object moving in an industrial furnace such as a continuous heating furnace or a continuous annealing furnace. It is something.

When installing a detector for detecting the temperature, length, position, etc. of the object to be measured in a conventional continuous heating furnace or continuous annealing furnace, avoid the inside of the high-temperature furnace and install a peephole on a part of the furnace wall or away from the furnace wall. Provide a seal window and install it outside the furnace so that it does not come into direct contact with the furnace atmosphere gas,
A long, slender cylindrical heat-resistant tube was inserted into the furnace, and a detector was attached to one end of the heat-resistant tube, away from the furnace wall, for measurements.

However, these methods have various drawbacks and are not desirable from a measurement perspective. For example, these drawbacks generally result in poor measurement accuracy because the distance between one object and the detector becomes long. The field of view of the two detectors becomes larger, and a surface area of the object larger than a certain area is required, making it impossible to measure small objects. 3. Certain measuring instruments (for example, devices for simultaneously measuring temperature and emissivity) cannot, in principle, measure objects inside the furnace because they must be brought close to the object.

The purpose of this invention is to eliminate the various drawbacks of the conventional devices mentioned above, and to provide a device that can be attached and detached without being affected by heat even if the detector is installed directly in the furnace. By using the in-furnace object detection device according to the present invention, since the temperature of the object to be measured can be measured with the detector close to the object, it is possible to accurately measure one moving object in the furnace without any errors. 2. Even when inspecting the measuring instrument or taking it out in the event of an abnormality, it is possible to safely install and remove the measuring instrument without interfering with the operation of the equipment.

This invention will be described in detail below with reference to preferred embodiments illustrated in the drawings.

Figures 1 and 2 are side sectional views of the present invention, with Figure 1 showing the state in which the temperature of the steel strip is being measured, and Figure 2 showing the state when the detector is taken out of the furnace.

In the figure, the detector 1 is protected from the heat inside the furnace by a shield plate 4 protruding from the inside 3 of a closed furnace 2, and is placed close to a steel strip 5 moving horizontally. They are placed vertically facing each other. Reference numeral 6 denotes a detector support member on which the detector 1 is placed, and is connected to a detector rib 7 by a bolt 8 in order to hang the detector. Furthermore, this detector support member can be used when adjusting the distance between the detector and the steel strip or when installing or removing the detector.
It is suspended from a steel frame 10 provided on the outer wall of the furnace via a connecting rod 9 that can be adjusted freely.

In addition, in this embodiment, a pin hole 1 is provided in the middle of the connecting rod 9.
1 is provided, and when the detector shown in FIG. 2 is installed or removed, a pin 12 can be inserted to temporarily lock the detector. However, the connecting rod 9 is not limited to such a structure; for example, the effective height of the connecting rod may be adjusted by an adjustment bolt that is threaded on the tip of the connecting rod and provided at the tip of the connecting rod. It is possible. Reference numeral 1a denotes a measuring tube of the detector, and a heat-resistant protective glass 1b is fitted into the tip thereof to prevent infiltration of the furnace atmosphere gas into the detector and to serve as an observation window for the object to be measured. 1c is a detector handle used when attaching and detaching the detector.

Next, in order to protect the detector 1 from the high-temperature atmospheric gas in the furnace and external damage, a shield plate 4 is provided protruding from the furnace inner wall 2. The measuring tube 1 of the detector is attached to this shield plate.
An observation window entrance/exit 13 is bored through which a person can enter/exit, and the inside of the shield plate is provided with refrigerant flow circulation passages 4a, 4b for protection from heat. Water is usually used as this refrigerant, but it is not particularly limited. Furthermore, if the shield plate is made of a heat-resistant ceramic, for example, which has particularly high heat resistance, internal circulation cooling may not be necessary.

The shield plate 4 is fixed to a furnace wall iron plate 15 at a flange portion 14. However, in this embodiment, the shield plate is configured separately from the furnace so that it can be easily attached and removed, but it may be made to partially protrude from the closed furnace 2. Distance 1 between shield plate 4 and detector 1
6. To protect from the thermal effects of the detector,
It has a sealed structure because it needs to be filled with an inert gas such as N ₂ gas. Reference numeral 17 denotes an inert gas supply port, which is connected to a supply valve (not shown) outside the furnace through a pipe 18 arranged on the furnace wall.

A seal body, in this embodiment, a bellows 19, which moves freely in accordance with the movement of the detector, is sealed between the detector support member 6 and the shield plate flange 14.
It has a structure that can follow the vertical movement of the detector 1.
Note that 6' and 14' are both seal members and are provided to improve the sealing effect between the bellows and the joint.
20 is a shutter device that moves the detector 1 upward;
When the detector measurement tube 1a leaves the observation window entrance/exit 13, the observation window entrance/exit is closed in order to prevent leakage of the atmosphere in the furnace from the measurement window entrance/exit to the gap 16.

In addition, the shutter device 20 is as shown in FIG.
A shutter case 21 in which a hole 13' is bored at a location corresponding to the observation window entrance 13, a column 24 that rotates the shutter plate 22 that opens and closes the hole 13' in the direction of the arrow around a fulcrum 23, and a handle 25 that moves this column.
It consists of The support column 24 is connected to the detector support member 6
It is installed through the. The handle 25 is provided with an interlocking device (not shown) so that the shutter plate 22 operates when the observation window entrance is opened, but the handle can also be operated manually.

Although the shutter device used in the present invention is not particularly limited to this example, the installation location is a shiyahei board for protection from heat and external damage, as shown in this example. It is preferable to provide the detector 1 inside the sensor 4 and in the gap between the detector 1 and the detector 1 .

Next, the operation of the embodiment with the above-described configuration will be explained.

First, as shown in Fig. 1, the detector is placed on the furnace body and after measuring the temperature of the steel strip, the procedure for removing this detector outside the furnace is as follows: 1. Lift up the detector handle 1c by hand. . 2 detector measurement tube 1a is observation window entrance 1
3, by moving the handle 25 in the direction of the arrow, the column 24 moves in the direction of the arrow,
The shutter plate 22 is rotated via the fulcrum 23 to close the shutter case hole 13'. 3 connecting rods 9
A pin hole 11 drilled in the middle of the furnace outer wall steel frame 1
After pulling the detector up to the point located above 0,
Insert the pin 12 into the pin hole 11 and temporarily lock the detector. 4 Detector rib 7 and detector support member 6
Remove the bolt 8 that connects the 5. After that, lift the detector by holding the handle 1c of the detector and take it out of the furnace. 6. Close the inert gas supply valve (not shown) that was supplying (eg, _N2 ) to the gap 16 between the detector and the shield plate.

Although the procedure for removing the detector from the furnace has been described above, the procedure for attaching the detector to the furnace will not be described because it can be carried out in the complete opposite order to the procedure for removing it.

As can be seen from the above embodiments of the present invention, according to the present invention, the detector is placed in the furnace close to the object to be detected to prevent the influence of heat inside the furnace while measuring temperature, dimensions, shape, etc. can be carried out more safely and accurately.
Further, in the event of an abnormality or failure of the detector, the detector can be installed and removed safely and quickly without stopping the operation of the furnace main body, which is a great advantage.

In the embodiment of the present invention, a steel strip was used as the object to be detected as described above, but it goes without saying that the present invention can also be used to measure a single stationary object using a batch type heating furnace.

[Brief explanation of the drawing]

Figures 1 to 3 are schematic diagrams illustrating an embodiment of the present invention, in which Figure 1 is a vertical cross-sectional view showing a state in which an object to be detected is being measured using the apparatus of the present invention, and Figure 2 is a schematic diagram illustrating an embodiment of the present invention. 3 is a longitudinal sectional view showing the state when the apparatus of the present invention is removed from the furnace, and FIG. 3 is a view taken along the line A--A in FIG. 2. 1: Detector, 1a: Detector measuring tube, 2: Closed furnace, 4: Shrink plate, 5: Steel strip, 6: Detector support member, 8: Bolt, 9: Connecting rod, 10: Furnace outer wall steel frame , 13: Observation window entrance, 19: Bellows, 20: Shutter device.

Claims (1)

[Scope of utility model registration request] Support member 6 on which the rib 7 of the closed furnace detector 1 is placed
is provided so as to be able to be hung on a base via a connecting rod 9, and a flange 14 is provided on a heat shielding plate 4 that houses the detector 1, and the heat shielding plate 4 is fixed to a closed furnace.
An observation window opening 13 is provided at the bottom of the detector measuring tube 1a through which the detector measurement tube 1a can be raised and lowered, an inert gas supply hole is provided in the side wall, and the support member 6 and flange 14 are sealed with a retractable sealing body to prevent heating. Inside the bottom of plate 4,
A heat shield attachment/detachment device for a closed furnace detector is provided with a shutter device 20 that can open and close the observation window entrance/exit 13, and has a structure in which a space 16 between the detector 1 and a heat shielding plate 4 can be sealed when the detector is removed. .