KR20010099116A - Furnace internal monitoring system composed of vision tube and non-powered automatic extraction device and method - Google Patents

Abstract

The present invention monitors the inside of a high temperature furnace at any time during the operation of the furnace, so that the inside of the furnace can be used as a criterion for judgment in promptly responding to the inside of the furnace or controlling the temperature. Regarding a camera system, a conventional camera system is expensive, bulky, complex installation, and should be installed by a professional, it is difficult to repair in the case of failure, there is a disadvantage that a high repair cost occurs.

In order to compensate for the above disadvantages, the present invention is easy to install, easy to repair due to the parts of the equipment, and built a small camera to reduce the repair cost, using a vision tube using a block-type lens The objective is to develop a low-cost, in-house surveillance system that does not require a camera protection housing and is automatically extracted automatically by a maintenance-free spring.

Description

In-house monitoring system composed of vision tube and non-powered automatic extraction device and method thereof

The present invention monitors the inside of a high temperature furnace at any time during the operation of the furnace, so that the inside of the furnace can be used as a criterion for judgment in promptly responding to the inside of the furnace or controlling the temperature. It relates to a camera system.

In general, the type of industrial furnace (furnace) is divided into several types depending on the product produced.

For example, there are industrial incinerators for incineration of wastes, steel mill furnaces used to dissolve metals, gases used to dissolve glass, cement furnaces, ceramics furnaces, and fired furnaces.

One of the common needs of operators in these types of furnaces is whether the inside of the furnace can be observed from time to time with clear images during the operation of the furnace.

Once the furnace starts to operate, it is operated continuously for a certain period of time unless a special failure occurs, so the inside of the furnace should be monitored from time to time to check the conditions in the furnace.

In the conventional method of observing the inside of an industrial furnace, a hole having a predetermined size is formed in the furnace wall, and the opening of the hole is opened to open and close the door where the operator is closed as necessary. It is common practice to visually check the inside of the furnace through the following holes.

This method accounts for more than 70% of the furnace currently in operation. When looking inside the furnace in the same way as above, infrared glass is attached to protect eyesight and block strong visible light. A separate face mask must be used.

However, in this method, since the hole is formed in the furnace wall, the thermal efficiency decreases and external air flows in, resulting in fluctuations in the combustion mixing ratio. The viewing angle that can be limited is limited to only a few, and the operator may be burned.

Another embodiment of the prior art for improving the above problems is to form a window in the furnace glass wall and quartz glass or heat-resistant glass that can withstand high temperature and to install the camera and the camera protection housing on the outside There is a method of monitoring the image inside the furnace by capturing the image formed in the window using a camera and a lens.

However, the above method also has a limitation in monitoring the situation inside the furnace because only a very limited image can be seen through the hole drilled in the furnace wall.

In addition, the glass itself is resistant to heat, but it is weak to impact and weak to abrasion and corrosion, and as a result, fly ashes, such as dust burned in the furnace, adhere to the inner surface of the window, resulting in a lack of transparency. Since there is no maintenance, it must be maintained.

Such a method has advantages over the previous embodiment but is inadequate for large furnaces or furnaces that require precise control of temperature.

Another example of the related art is a method of inserting an imaging device called a lens tube into a furnace and observing the inside of the furnace through a monitor.

The method arranges the lenses 2 in a line in the existing lens tube 1 as shown in FIG. 1, connects the camera protection housing 3 to the rear of the lens tube 1, and the general camera 4 inside the housing. Install it.

It is installed on the rail 7 for the cylinder as shown in FIG. 3, the cylinder 8 and the housing pedestal 6 are fixed, and the compressed air supply valve 25 at the rear end of the cylinder 8 is supplied to the housing pedestal ( 6) Move the lens tube (1) into the furnace to shoot / monitor the inside of the furnace, and pressurized air supply valve (25) at the front end of the cylinder in case of an emergency such as inspection or when there is a power failure Compressed air is supplied to extract the lens tube (1) from the inside to protect the lens tube (1) from the high temperature inside the furnace (爐).

The image inside the furnace taken by the above method passes through the lens 2 arranged in a line inside the lens tube 1 and is transmitted to the image sensor 5 for condensation and is monitored through the ELECTRIC CONTROL BOX 30. By displaying on the real monitor 100, internal furnace monitoring is enabled.

At this time, since the inside of the furnace is in a high temperature state, the camera protection housing 3 and the lens tube 1, which are specially manufactured for the protection of the camera, are cooled by receiving compressed air of high pressure from the AIR CONRTOL BOX 31. It is injected to the outside via a certain path.

However, since the internal monitoring system according to the method described above uses a cylinder type extraction device and a camera protection housing 3, a separate structural device is required to fix it, and the lens part is damaged. Since the entire lens tube 1 needs to be replaced, it causes a lot of maintenance cost and price.

The present invention seals the inside of the furnace to compensate for the above disadvantages and at the same time has a low cost and easy installation, and the inside of the furnace using a small camera integrated vision tube that is easy to repair due to the parts of the equipment. The goal is to develop an internal furnace monitoring system that can monitor more of the system.

In order to achieve the above object, the present invention uses a small camera 11 as shown in FIG. 2 instead of using a conventional lens tube 1 and a camera protection housing 3, and designs and assembles the lens in block units. And a vision tube 12 fabricated to facilitate disassembly. In addition, as shown in FIG. 6, a signal generated from the control box 14 is transmitted to the electric locking device 15 using the solenoid at the time of maintenance by using the spring 13, in case of power failure, or in case of emergency in which compressed air is blocked. By automatically extracting the tube 12 without power, the vision tube is protected from the high temperature inside the furnace.

At this time, in order to protect the vision tube 12 entering the furnace from the high temperature, the compressed air is supplied from the control box 14, which is injected through the front of the objective lens 16 of the vision tube through a certain passage.

It is to provide an internal monitoring system, characterized in that to provide the operator to observe / monitor the image inside the furnace through the monitor 100 by the above method.

1 is a cross-sectional view of a lens tube in which lenses are arranged in a line according to an embodiment of the related art.

2 is a cross-sectional view of a vision tube manufactured by manufacturing a lens in a block type and mounting a small camera therein according to an embodiment of the present invention.

3 is a schematic diagram of a furnace monitoring system using a retractor using a cylinder and a housing for protecting a camera as another embodiment of the existing technology.

4 is a system configuration diagram of another embodiment of the existing technology

5 is a schematic view of a non-powered automatic extraction device and vision tube using a spring spring when the vision tube is inserted into the furnace as an embodiment of the present invention;

6 is a schematic view of a non-powered automatic extraction device and vision tube using a spring spring when the vision tube is extracted in the furnace as an embodiment of the present invention;

FIG. 7 is a cross-sectional view of a furnace internal monitoring system viewed from the rear as an embodiment of the present invention. FIG.

8 is a configuration diagram of an internal furnace monitoring system according to an embodiment of the present invention.

<Explanation of symbols for main parts of drawing>

1 Lens tube 2 Lens 3 Camera protection housing

4: camera 5: image sensor 6: housing pedestal

7: cylinder rail 8: cylinder

10: block type lens 11: small camera 12: vision tube

13: Spring 14: CONTROL BOX 15: Electric locking device

16: objective lens 17: vision tube fixing bracket

18: carriage plate 19: rail 20: wall sleeve

21: flange 22: frame 23: latch

24: video output terminal 25: compressed air supply valve

26: Interior 27: Appearance 28: Shock Absorber

29: protective cap 30: ELECTRIC CONTROL BOX

31: AIR CONTROL BOX 100: monitor

Hereinafter, an internal furnace monitoring system according to the present disclosure will be described with reference to the accompanying drawings.

First, in order to monitor the inside of the furnace, the carriage plate 18 connected to the vision tube fixing bracket 17 is coupled with the rail 19 as shown in FIG. 7, and the flange of the wall sleeve 20 and the vision tube 12 is formed. 21) closely contact the compressed air to be supplied to the outside and bind the electric locking device (15) installed on the frame (22) and the latch (23) installed on the vision tube fixing bracket (17) side.

As shown in FIG. 5, one end of the spring 13 is fixed to the vision tube fixing bracket 17 and the other is fixed to the frame 22, and then the vision tube 12 is pushed toward the inlet of the furnace. In the present invention, the lens tube is not extracted from the inside of the furnace by a power such as a conventional cylinder or a motor, but is automatically extracted with no force by the elasticity of the spring 13.

At this time, the electric lock 15 prevents the vision tube 12 from being randomly extracted by the elasticity of the spring 13 fixed to the frame 22, and the operator switches the switch from the control box 14 for automatic extraction in case of emergency. It automatically detects in case of an emergency such as operation or power failure or abnormal supply of compressed air, and releases the fasteners 23 installed on the electric locking device 15 and the vision tube fixing bracket 17 to enable automatic extraction. Function.

2 is a cross-sectional view of a vision tube manufactured by manufacturing a lens in a block type and mounting a small camera therein according to the present invention;

The image inside the furnace to be monitored for the first time passes through the objective lens 16 through a small hole in the front end of the vision tube 12 and is made of a block-type lens 10 so that the removable lens and the relay can be detached. After passing to the lenses, it passes through the light attenuation filter to reach the IMAGE SENSOR 5 of the small camera 11 located behind the vision tube.

At this time, the block-type lens 10 is made to protrude so that the lens can be positioned at the center of the vision tube, and only the damaged lens block is replaced during maintenance. If the existing lens tube is damaged, the entire lens tube is replaced. By doing so, it is possible to compensate for the disadvantages of cost and long term.

The image inside the furnace reaching the IMAGE SENSOR 5 by the above method is sent to the CONTROL BOX 14 via the terminal block installed in the frame 22, and this image is again sent to the monitor of the central monitoring room. 100) to enable monitoring.

In addition, the present invention uses compressed air to cool the vision tube 12 inserted into the furnace from high temperatures.

At this time, the compressed air for protecting the vision tube 12 is supplied in the field, sent to the control box (14), purged through the filter in the control box (14) to remove impurities and supplied at a constant pressure using a pressure switch Done.

The compressed air is connected to the compressed air supply valve 25 connected to the rear end of the vision tube through a pipe, and as shown in FIG. 2, an inner tube for protecting the block type lens 10 and the small camera 11. 26) and between the exterior (26) made of a special material to protect the inner tube from the outside temperature, it is injected through a small hole in the front end of the vision tube.

In addition, compressed air is supplied to the compressed air supply valve 25 of the wall sleeve 20 installed on the wall of the furnace, and passes through the space between the vision tube 12 and the furnace hole to pass through the vision tube 12. I) It is sprayed inside.

The vision tube inserted into the furnace in the same manner as described above has a high pressure between the outer tube 27 and the outer tube 27 of the outer tube 27 and the outer tube 27 of the material which can withstand high temperatures. Compressed air that has been supplied by passing compressed air through the small hole at the foremost end of the vision tube 12, and injected into the furnace by passing compressed air between the outside of the vision tube and the wall sleeve 20 Due to the cooling effect, it can withstand high temperatures.

6 is a schematic view of a non-powered automatic extraction device and vision tube using a spring spring when the vision tube 12 is extracted in the furnace as an embodiment of the present invention.

In order to maintain the vision tube that supplies the inside of the furnace, the operator may manually extract it by operating the switch attached to the control box 14, or compressed air may not be supplied to the vision tube, or it may be below a certain supply pressure. When this is detected by the pressure switch built in the CONTROL BOX (14) automatically sends a signal to the electric locking device (15), the locking device is released by the elasticity of the spring automatically loosening the binding.

At this time, in order to protect the vision tube extracted by the elasticity of the spring to install a shock-absorbing shock absorber 28 fixed to the frame 22 in the retracted position of the vision tube fixing bracket 17 to mitigate the impact.

In addition, after the vision tube is extracted, the vision tube is automatically extracted to protect external life from the flame caused by the pressure difference from the inside of the furnace, and passes through the inlet of the wall sleeve 20 and at the same time the protective cap ( 29 automatically blocks the opening of the wall sleeve 20 to block the flame.

In the above-described method, a system for monitoring an internal image of a furnace by inserting a vision tube 12 including a block-type lens 10 and a small camera 11 into a furnace is conventional. Instead of using the lens tube (1) and the camera protection housing (3), a small camera (11) is built-in, and the installation is made by using a vision tube (12) designed for easy assembly and disassembly by designing the lens in blocks. It monitors more of the inside of the furnace by using a vision tube that is easy to repair and easy to repair due to the parts of the equipment.

In addition, as shown in FIG. 7, a signal generated from the CONTROL BOX 14 is sent to the electric locking device 15 using the solenoid in the case of maintenance / check and power failure or an emergency in which compressed air is cut off using the spring 13. By automatically extracting the tube (12) with no power, it eliminates the trouble caused when the extraction by the power.

In addition, by providing high-performance products at low cost, it is possible to monitor the inside of furnaces such as steel mills, cement plants, incinerators, power plants, etc. It is a useful invention that can greatly develop the industrial furnace industry by improving the reliability and productability of products. .

Claims (1)

In the furnace monitoring system, which monitors the inside of a high temperature furnace where worker's proximity is difficult through the hole of the furnace wall, In order to capture the image inside the furnace, the front end lens and each lens are arranged inside to form a group of lenses, which are transmitted through a combination of a block lens group and a block lens group made of a block type to enable a combination thereof. CONRTOL between the inner tube and the exterior made of a special material with high heat resistance and corrosion resistance in order to protect the inner tube from the internal temperature and the surrounding environment with a small camera for capturing the image inside the furnace. Vision tube, characterized in that the cooling effect is generated by passing through the compressed air supplied from the box and sprayed to the front portion Wall sleeve with function to cool and protect the vision tube by close contact with the flange to prevent the compressed air supplied from the control box to the outside and spray it between the inside of the furnace and the vision tube, In order to protect the vision tube inserted into the furnace from high temperature, the pressure of the compressed air supplied from the control box drops below a certain pressure or when one of the springs occurs, the vision tube fixing bracket Fixed to the frame and the other side is fixed to the frame by automatically retracting the vision tube out of the furnace by the spring's resilience, and to protect the vision tube extracted by the spring's resilience at the retracted position of the vision tube fixing bracket. A non-powered automatic extraction device, characterized in that to reduce the impact by installing a pull-up show bar, When the vision tube is inserted into the furnace, it is tied to the latch installed on the vision tube bracket to prevent the vision tube from being randomly extracted by the elasticity of the spring. An electric locking device using a solenoid, characterized in that the non-powered automatic extraction device can be operated by releasing the binding by receiving a signal from the CONT-ROL BOX in case of emergency below the pressure; AIR CONTROL function that purifies the air supplied through the filter to remove impurities and provides constant compressed air by using the pressure switch, and the electric lock device using the above solenoid during maintenance, in case of power failure and abnormal supply of pressure air. A furnace internal monitoring system, comprising a control box with an electrical control function that sends a signal to enable automatic extraction and retransmits the image transmitted from the vision tube to the central monitoring room for monitoring.