CN100516239C - Blast furnace tuyere pick-up device and monitoring system thereof - Google Patents

Abstract

This invention relates to an image device and watch system using in the bftuyere. The image device is fixed in the shield with a drawtube and blowhole in the front. Decompn glass and bftuyere glass are fixed in the drawtube. The shield fixed with intake joint and decompression filtration valve and ball valve. The watch system include field control cabinet, central control cabinet, screen, industrial controller and image device. There are a set of image device and air feed system each bftuyere. The air feed system include main pipe line, branch pipe line and gas bag. The gas bag connect with the fan-out of the main pipe line and one to two branch pipes, the another end of the branch pipes connect with another gas bag. The image device connects with branch pipe line through the decompression filtration valve and ball valve. This image device suit to the environment of bftuyere and the watch system could connect the personal patrol with the watch device properly.

Description

Blast furnace tuyere camera device and its monitoring system

technical field

The invention relates to a blast furnace tuyere camera device and a monitoring system thereof.

Background technique

Blast furnace tuyere camera device is a device to obtain furnace combustion, coal injection and tuyere status information through blast furnace tuyere, and online monitoring system is an important means of monitoring and analyzing blast furnace conditions. At present, in domestic iron works, experienced operators directly observe the inside of blast furnace tuyeres one by one through naked eyes and experience. Because each blast furnace has many tuyeres and a large distribution area, for example, there are 38 tuyeres in a volume of 4350m ³ , and the blast furnace is evenly distributed around a circle with a circumference of about 60 meters. Conditions, coal powder conditions, ventilation conditions, internal equipment conditions, other abnormal phenomena and other issues. It brings a lot of inconvenience to the on-site operators, such as long inspection cycle, poor working environment, and difficulties such as continuous monitoring. Therefore, it is difficult to find abnormalities in time and accurately, solve and eliminate faults, which brings great inconvenience to the stable production and production command of the blast furnace, and there is no status observation imaging tracking record. The 4350m ³ blast furnace has 38 tuyere coal injection monitoring holes, which are used to observe whether the spray gun is blocked and the combustion state in the furnace. The existing method is to use three fixed blast furnace tuyere camera devices. The service life and normal operation of the camera, the lens of the camera is 20cm-30cm away from the air outlet, which not only has a small field of view, but also is difficult to adjust, and blocks the sight of people on site. This camera device only performs fixed monitoring on three of the air outlets, and if other air outlets need to be monitored, the device needs to be moved temporarily. However, due to the heavy weight of the camera bracket and the need to re-adjust the height, left and right positions after each change of position, and normal manual inspections cannot be performed after the equipment is installed, the reliability of the coal injection monitoring at the tuyere is greatly reduced. The key is that it cannot be monitored in real time. Monitor the blowing situation of each tuyere. Since the ambient temperature of the tuyere is as high as 60°-120°C, the existing camera device cannot image each tuyere, and the traditional surveillance camera can only work in an environment with an ambient temperature of 0-50°C, and cannot be directly implemented in front of the furnace. Online real-time monitoring is not suitable for blast furnace tuyere camera.

Contents of the invention

In order to overcome the above-mentioned shortcomings of existing camera devices, the present invention provides a camera device suitable for blast furnace tuyere monitoring, which also takes into account the requirements for manhole observation. At the same time, the invention also provides a blast furnace tuyere monitoring system.

First of all, to make the camera work in an environment of 60°-120°C, the camera device must be cooled or protected from heat. Since moisture will damage the camera device, it is air-cooled and a protective cover is installed outside the camera device. , Cool the camera with nitrogen gas.

The selection of the optical path splitter and the camera is the key to this camera device. Since the strong light source transmitted from the blast furnace tuyere must meet the requirements of reducing the light intensity of the refracted camera to ensure the imaging quality and service life of the camera, and the transmission The light passing through the optical path distributor can be observed by the naked eye of the human body. It is easy to install and dismantle. The amount of light transmitted and the magnification of the lens are used to obtain the best imaging quality. Therefore, parameters such as the optical zoom factor of the camera, the amount of light transmitted, and the size of the CCD must be considered in the selection of the camera, and it is convenient to adjust the parameters of the imaging camera.

In order to meet the camera requirements of the air outlet with an aperture of 2 cm and a length of 2-3 meters, an integrated camera with a camera lens and a camera is used, with an optical zoom of 18 times, a digital zoom of 12 times, a 1/4-inch CCD lens, and a light flux of F2.0- F3.0, and with the optical light reduction film at the front end, the internal parameters of the camera are adaptively adjusted to obtain better imaging effects in high-intensity light environments.

Due to the high light intensity of the camera target inside the tuyere, the camera cannot directly image (the image is pure white or even burns the CCD photosensitive chip), so the suppression measures of high-intensity light must be considered, that is, add a light reduction filter at the front end of the CCD camera For light filtering and imaging, 90%-98% of light must be filtered out, and better imaging effects can be obtained in combination with the adjustment of the internal parameters of the camera.

In order to meet the requirements of camera imaging and manhole observation, a light splitter is added to the front end of the camera imaging device, which is divided into reflected light and transmitted light, which are used for camera imaging and manhole observation respectively.

Blast furnace tuyere camera device

The blast furnace tuyere camera device includes a camera, which is characterized in that a protective cover is also installed, the camera is installed in the protective cover, guide rails are fixed inside the protective cover, guide rail seats are installed on both sides of the camera, and the camera is installed on the guide rails by the guide rail seats Above, there is a distance of 3mm to 6mm between the inside of the protective cover and the camera. The front cover at the front end of the protective cover is provided with a light hole, and a vent hole is arranged around the light hole, a filter is installed in the light hole, and a protective cover connecting pipe is installed at the front end of the protective cover, and the connecting pipe is fixed. With a flange, the protective cover connecting pipe is fastened to the protective cover by the flange. The connecting tube of the protective cover is connected to the horizontal lens barrel through the connecting tube of the lens barrel. The beam splitter mounting frame is installed in the lens tube, and the beam splitting glass is installed at the position corresponding to the beam splitting mirror mounting frame and the light hole. The beam splitting glass and the lens tube The axis of the lens is 45°, the tuyere connecting pipe is installed at one end of the lens barrel, the tuyere glass made of quartz glass is installed on the tuyere connecting pipe, and the observation mirror is installed at the other end of the lens barrel. An aviation plug is installed on the back cover at the lower end of the protective cover, cables are connected between the aviation plug and the camera, and an air inlet joint is installed at the bottom of the protective cover.

The reflectance of the spectroscopic glass of this blast furnace tuyere camera device is 45%-55%, the light transmittance of the optical filter is 4%-6%, mainly to filter out infrared light, and the light transmittance of the tuyere lens is 95%-98% %, the light transmittance of the observation mirror is 95%-98%. After the light is reflected by the tuyere lens and the spectroscopic glass, and then filtered by the filter, the light reaching the lens of the camera is 1%-3%. The focal length of the camera lens of the imaging device is 4.1cm-73.8cm, the optical zoom is 18 times, the size of the CCD is 1/4, the amount of light is F2.0-F3.0, and the digital zoom is 12 times. A centering device is arranged on the lens barrel, and the fine adjustment of the centering device between the lens barrel and the light hole ensures that the reflected light is coaxial with the camera lens.

The blast furnace tuyere camera device is provided with an air supply connector, which is a decompression filter valve and a ball valve. The air inlet joint of the protective cover is connected to the decompression filter valve through a connecting hose, and the decompression filter valve is connected to the ball valve.

The blast furnace tuyere camera device is installed at the blast furnace tuyere. A blast furnace has 20 to 40 tuyeres, and each tuyere is equipped with a camera device equipped with a gas supply connector. It is used in conjunction with 20 to 40 camera devices, and Equipped with a unified nitrogen gas supply system, the gas supply system includes the gas supply main air pipe, bronchus and air bag, the seamless steel pipe used for the gas supply main air pipe is laid along the lower platform of the hot air pipe, and a gas pipe is connected to the output end of the main air pipe. The air bag is connected to one or two bronchi with a smaller diameter than the main trachea, and the other end of the bronchus is connected to another air bag to ensure that the pressure of each cooling branch pipe is balanced (0.1Mpa-0.6Mpa). The air bag is installed Alarmable electric contact pressure gauge (0-1.0Mpaφ100mm panel), when the alarm pressure P≤0.1Mpa, the alarm contact is closed, and an alarm signal is sent out to the computer of the coal injection system to remind the post personnel to check the gas source protection equipment . Each imaging device is connected with the bronchus through a decompression filter valve and a ball valve in turn. The air source can also be clean compressed air.

Blast furnace tuyere monitoring system

The blast furnace tuyere monitoring system includes on-site control cabinet, central control cabinet, screen, industrial control machine, regulated power supply and camera device. The camera device is connected to the input end of the on-site control cabinet with a cable. The output end of the control cabinet uses a multi-core single-mode optical cable generally with twelve cores (the number of cores is mainly determined by the optical transceiver). The single-mode optical cable, power line, and air pressure control line are connected to the input end of the central control cabinet. One end is connected with the screen, one of the output ends is connected with the input end of the industrial control machine, one output end of the industrial control machine is connected with the display screen and keyboard, and the power input end of the central control cabinet is connected with the output end of the regulated power supply; on-site control The cabinet is composed of a digital video optical transceiver and a power supply device, and the image signal is transmitted to the central control cabinet in the control room through an optical cable; the central control cabinet is composed of a digital video optical transceiver and a control host, and the signal is photoelectrically converted in the central control cabinet and sent to The display screen shows the operating status of each tuyere; it is characterized in that: the camera device provided by this application is equipped with a gas supply connector, and is also provided with a gas supply system; each tuyere of the blast furnace is equipped with a camera device, twenty to forty camera devices are used together, the camera device is equipped with a protective cover, the camera is installed in the protective cover, the guide rail is fixed inside the protective cover, and the guide rail seat is installed on both sides of the camera, and the camera is installed by the guide rail seat On the guide rail, there is a gap of 3mm to 6mm between the inside of the protective cover and the camera. The front cover at the front end of the protective cover is provided with a light hole, and a vent hole is arranged around the light hole, a filter is installed in the light hole, and a protective cover connecting pipe is installed at the front end of the protective cover, and the connecting pipe is fixed. With a flange, the protective cover connecting pipe is fastened to the protective cover by the flange. The connecting tube of the protective cover is connected to the horizontal lens barrel through the connecting tube of the lens barrel. The beam splitter mounting frame is installed in the lens tube, and the beam splitting glass is installed at the position corresponding to the beam splitting mirror mounting frame and the light hole. The beam splitting glass and the lens tube The axis of the lens is 45°, the tuyere connecting pipe is installed at one end of the lens barrel, the tuyere glass made of quartz glass is installed on the tuyere connecting pipe, and the observation mirror is installed at the other end of the lens barrel. An aviation plug is installed on the back cover at the lower end of the protective cover, cables are connected between the aviation plug and the camera, and an air inlet joint is installed at the bottom of the protective cover. The reflectance of the spectroscopic glass of the camera device is 45%-55%, the light transmittance of the color filter is 4%-6%, the light transmittance of the tuyere lens is 95%-98%, and the light transmittance of the observation mirror is 95%. %-98%. After the light is reflected by the tuyere lens and the spectroscopic glass, and then filtered by the color filter, the light reaching the lens of the camera is 1%-3%. The focal length of the camera lens of the camera device is 4.1cm-73.8cm, the optical zoom is 18 times, the CCD size is 1/4, the amount of light is F2.0-F3.0, and the digital zoom is 12 times. A self-aligning device is arranged on the lens barrel. The air intake joint of the protective cover is connected to the pressure reducing filter valve through the connecting hose, and the pressure reducing filter valve is connected to the ball valve; The seam steel pipe is laid along the platform on the lower side of the hot air pipe, and an air bag is connected to the output end of the main air pipe. Another air bag is equipped with an electric contact pressure gauge capable of alarming, and each camera device is connected with the bronchus through a decompression filter valve and a ball valve in turn.

The blast furnace tuyere camera device is equipped with spectroscopic glass, filter and protective cover, which avoids the adverse influence of blast furnace tuyere temperature on the camera, and is easy to install, convenient to adjust, and has a long service life. hole observation. The blast furnace tuyere camera device is equipped with gas supply device, field control cabinet, central control cabinet and industrial control machine, etc., to form the blast furnace tuyere monitoring system of the present invention. This monitoring system can well combine blast furnace tuyere personnel inspection and equipment monitoring. . It is convenient to eliminate human-caused omissions and mischecks, and records images in real time, providing a reliable basis for analyzing and solving problems.

Description of drawings

Fig. 1 is a structural diagram of an embodiment of the blast furnace tuyere imaging device.

Fig. 2 is a composition diagram of an embodiment of an air supply connector of the imaging device.

Fig. 3 is a composition diagram of an embodiment of the blast furnace imaging device with a gas supply system.

Fig. 4 is a schematic diagram of the electrical components of the embodiment of the blast furnace tuyere monitoring system.

In the above figure:

1. Tuyere connecting pipe 2. Lens barrel 3. Top screw hole 4. Tuyere lens

5. Feather washer 6. Pressure ring 7. Aligning device 8. Spectroscopic glass

9. Spectroscopic glass mounting frame 10. Feather washer 11. Observation tube 12. Slot

13. Observation mirror 14. Feather washer 15. Lens barrel gland

16. Spectroscopic mirror pressing piece 17. Lens tube connecting pipe 18. Protective cover connecting pipe

19. Light hole 20. Feather gasket 21. Front cover 22. Optical filter

23. Protective cover 24. Fixing hole 25. Guide rail 26. Guide rail seat

27. Camera 28. Fastening screw 29. Back cover 30. Through hole

31. Aviation plug 32. Through hole 33. Air intake connector 34. Cable

35. Plug 36. Guide rail 37. Lens 38. Fastening screw

39. Flange 40. Air vent 41. Connecting thread 42. Blast furnace tuyere

43. Connecting pipe 44. Valve 45. Connecting pipe 46. Valve

47. Connecting hose 48. Nitrogen connection piece 49. Pressure reducing filter valve 50. Cable

51. Ball valve 52. Nitrogen interface 53. Nitrogen source 54. Gas bag

55. Pressure gauge 56. Bronchus 57. Bronchus 58. Camera device

59. Tuyere 60. Blast furnace 61. Gas bag 62. Main air pipe

63. Nitrogen valve 64. Main air pipe 65. On-site control cabinet 66. Single-mode optical cable

67. Central control cabinet 68. Screen 69. Display 70. Keyboard

71. Industrial control machine 72. Network 73. Regulated power supply 74. Power cord

75. Signal cable

Detailed ways

The specific implementations of the blast furnace tuyere imaging device and its monitoring system will be described in detail below in conjunction with the embodiments and accompanying drawings, but the specific implementations of the blast furnace tuyere imaging device and its monitoring system are not limited to the following embodiments.

Blast furnace tuyere camera device embodiment one

The blast furnace tuyere imaging device described in Fig. 1 comprises camera 27, and protective cover 23 is also arranged, and camera 27 is installed in the protective cover 23, guide rail 25 and guide rail 36 are fixed on protective cover 23 inner sides, and guide rail is installed on the both sides of camera 27 Seat 26, camera 27 is installed on the guide rail by guide rail seat 26, has the interval of 3～6mm between protective cover 23 inboards and camera 27. The front cover 21 at the front end of the protective cover 23 is provided with a light-through hole 19, around the light-through hole 19 is provided with a vent hole 40, the optical filter 22 is installed in the light-through hole 19, and a protective cover is installed at the front end of the protective cover 23. The cover connecting pipe 18 is fixed with a flange 39, and the protective cover connecting pipe 18 is fastened to the protective cover 23 by the flange 39. The protective cover connecting pipe 18 is connected with the horizontal mirror barrel 2 through the mirror barrel connecting pipe 17, and the mirror barrel connecting pipe 17 and the mirror barrel 2 are fixed as a whole. 9 A spectroscopic glass 8 is installed at the position corresponding to the light hole 19, and the spectroscopic glass 8 is at a 45° angle to the axis of the lens barrel 2. The tuyere connecting pipe 1 is installed on the left end of the lens barrel 2 in FIG. The tuyere glass 4 made of quartz glass material is installed, and the observation mirror 13 and observation tube 11 made of quartz glass material are installed at the right end of the lens barrel 2 .

The back cover 29 of protective cover 23 lower ends is equipped with aviation plug 31, is connected cable 34 between aviation plug 31 and video camera 27, and the side of protective cover 23 bottoms is installed air inlet connector 33.

In the present embodiment, the reflectivity of the dichroic glass 8 is 50%, the light transmittance of the optical filter 22 is 5%, the light transmittance of the tuyere lens 4 is 98%, and the light transmittance of the observation mirror 13 is 98%. After the light is reflected by the tuyere lens 4 and the spectroscopic glass 8, the light that is filtered by the color filter 22 and reaches the lens 37 of the video camera 27 is 2%. The camera 27 of this embodiment is produced by ZDH Company, the model is ZD100, the focal length of the lens 37 of the camera 27 is 4.1cm-73.8cm, the optical zoom is 18 times, the CCD size is 1/4 ", and the light flux is F2.0 to F3.0 , the digital zoom is 12 times. The present embodiment is between the lens barrel 2 and the light hole 19 by the fine-tuning of the centering device 7 (for adjusting the angle of the spectroscopic glass 8), ensuring that the reflected light is coaxial with the camera lens.

The present embodiment is provided with air supply connector, see Fig. 2 and Fig. 3, when the air inlet joint 33 of protective cover 23 is connected to decompression filter valve 49 through connection hose 47 and nitrogen connector 48, by decompression filter valve 49 is connected with ball valve 51.

Blast furnace tuyere camera device embodiment two

A blast furnace has more than 30 tuyeres, more than 30 cameras are installed, and there must be a unified gas supply system. The blast furnace 60 of this embodiment has 38 tuyeres 59, and each tuyere has a blast furnace tuyere camera. Embodiment 1 The camera device uses a unified nitrogen source or clean compressed air. The gas supply system includes nitrogen gas supply main air pipe 62, bronchus 56, bronchus 57, air bag 61 and air bag 54. The main air pipe 62 uses φ25*3 seamless steel pipe to lay along the lower platform of the hot air pipe, between the two air outlets Use φ18*3 seamless steel tube bronchus 56 or bronchus 57 to lead out the gas source, 19 camera devices 58 are connected with bronchus 56 through decompression filter valve 49 and ball valve 51 in turn, and 19 camera devices 58 are sequentially passed through decompression filter valve 49 And the ball valve 51 is connected with the bronchus 57, and the bronchus 57 (the material is a high-pressure oxygen hose) sends the cooling gas source into the air-cooled protective cover camera 27 for cooling and purging through the ball valve 51, the decompression filter valve 49 and the nitrogen connection piece 48, An air bag 54 and an air bag 61 are arranged at the bifurcation of the bronchus 56 and the bronchus 57, and the air bag 61 is connected at the output end of the main trachea 62, and the air bag 61 is connected with the bronchus 56 and the bronchus 57, and the other end of the bronchus 56 and the bronchus 57 The air bag 54 is connected to ensure the pressure balance (0.1Mpa-0.6Mpa) of each cooling branch pipe. An alarmable electric contact pressure gauge 55 (0-1.0Mpaφ100mm panel) is installed on the gas bag 54. When the alarm pressure P≤0.1Mpa, the alarm contact is closed and an alarm signal is sent out to the computer of the coal injection system to remind Post personnel check the gas source protection equipment.

Example of Blast Furnace Tuyere Monitoring System

The blast furnace tuyere monitoring system described in Fig. 4 comprises field control cabinet 65, central control cabinet 67, 55 inch screen 68, industrial control machine 71, voltage stabilized power supply 73 and 38 camera devices 58, and each camera device 58 uses cable 50 to communicate with the scene The input end of the control cabinet 65 is connected, and there are video cables and power lines in the cable 50. The output end of the field control cabinet 65 is connected with the central The input end of the control cabinet 67 is connected, one output end of the central control cabinet 67 is connected with the screen 68, one of the output ends is connected with the input end of the industrial control machine 71, and one output end of the industrial control machine 71 is connected with the display screen 69 and the keyboard 70 Connection, the network port of the industrial control machine 71 is connected with the local area network 72, so that other management personnel can observe the state of the tuyere at any time through the network. The power input end of the central control cabinet 67 is connected with the output end of the voltage-stabilized power supply 73 . On-site control cabinet 65 is composed of Tsingda Huadian IPV series digital video optical transceiver and power supply device. The image signal is transmitted to the central control cabinet 67 in the control room through an optical cable. Guarantee the transmission quality of the image. The central control cabinet 67 is composed of Tsinghua University Huadian IPV series digital video optical transceivers and Dahua DVR8016 control host. In the central control cabinet 67, the signal is photoelectrically converted and sent to the display screen 69 to display the operating status of each tuyere. The camera device 58 used in this embodiment is the camera device with the gas supply connector of the blast furnace tuyere camera device embodiment above, the camera device 58 is installed on the valve 44 of the blast furnace tuyere 42, and the camera device 58 is provided with a protective cover 23 and a lens barrel 2 And the air supply device, the lens barrel connecting pipe 17 and the lens barrel 2 are fixed as a whole, the beam splitter mounting frame 9 is installed in the lens barrel 2, and the spectroscopic glass is installed at the position corresponding to the beam splitter mounting frame 9 and the light hole 19 8. The splitting glass 8 is 45° to the axis of the lens barrel 2. One end of the lens barrel 2 is installed with the tuyere connecting pipe 1, the tuyere connecting pipe 1 is installed with the tuyere glass 4, and the other end of the lens barrel 2 is installed with the observation mirror 13. and observation tube 11.

The present embodiment is also provided with the air supply system described in FIG. 3 , 19 camera devices 58 are connected with the bronchus 56 through the decompression filter valve 49 and the ball valve 51 successively, and the 19 camera devices 58 are successively passed through the decompression filter valve 49 and the ball valve 51 Connect with bronchi 57.

Claims (6)

1. A blast furnace tuyere camera device, which includes a camera, is characterized in that: a protective cover is also arranged, the camera is installed in the protective cover, a guide rail is fixed inside the protective cover, a guide rail seat is installed on the camera, and the camera is installed by the guide rail seat On the guide rail, there is a distance of 3mm to 6mm between the inner side of the protective cover and the camera. A light hole is set on the front cover of the front end of the protective cover, and a vent hole is set around the light hole, and a filter is installed in the light hole. Light sheet, install the protective cover connecting pipe at the front end of the protective cover, fix a flange plate on the protective cover connecting pipe, the protective cover connecting pipe is fastened on the protective cover by the flange plate; the protective cover connecting pipe passes through the lens tube connecting pipe Connect the horizontal lens barrel, install the beam splitter mounting frame in the lens barrel, install the beam splitting glass at the position corresponding to the beam splitter mounting frame and the light hole, the beam splitting glass is 45° to the axis of the lens barrel, and install it at one end The tuyere connecting pipe, the tuyere glass made of quartz glass material is installed on the tuyere connecting pipe, and the observation mirror is installed on the other end of the lens barrel; the aviation plug is installed on the rear cover at the lower end of the protective cover, between the aviation plug and the camera The cables are connected, and the air inlet connector is installed at the lower part of the protective cover. 2. The blast furnace tuyere camera device according to claim 1, characterized in that: an air supply connector is also provided, the air supply connector is a decompression filter valve and a ball valve, and the air inlet joint of the protective cover is connected through a connecting hose To the pressure reducing filter valve, the ball valve is connected by the pressure reducing filter valve. 3. The blast furnace tuyere camera device according to claim 2, characterized in that: each blast furnace tuyere is equipped with a camera device, and a gas supply system is also provided, the gas supply system includes a gas supply main air pipe, a bronchus and a gas bag, and the air supply main The seamless steel pipe used for the air pipe is laid along the platform on the lower side of the hot air pipe, and an air bag is connected to the output end of the air supply main air pipe. Another air bag is equipped with an electric contact pressure gauge that can report to the police, and each camera device is connected with the bronchus through a decompression filter valve and a ball valve in turn. 4. The blast furnace tuyere camera device according to claim 1, 2 or 3, characterized in that: the reflectivity of the spectroscopic glass is 45%-55%, and the light transmittance of the optical filter is 4%-6% , the light transmittance of the tuyere glass is 95%-98%, and the light transmittance of the observation mirror is 95%-98%. 1%-3%; the focal length of the camera lens described in the camera device is 4.1cm-73.8cm, the optical zoom is 18 times, the CCD size is 1/4, the amount of light is F2.0-F3.0, and the digital zoom is 12 times . 5. A blast furnace tuyere monitoring system, which includes a field control cabinet, a central control cabinet, a screen, an industrial control machine, a regulated power supply, and a camera device. The camera device is connected to the input end of the field control cabinet with a cable, and there is a video cable in the cable With the power line, the output end of the field control cabinet is connected with the input end of the central control cabinet with a multi-core single-mode optical cable, power line, and air pressure control line. One output end of the central control cabinet is connected to the screen, and the other output end is connected to the industrial control cabinet. The input end of the industrial control machine is connected with the display screen and the keyboard, and the power input end of the central control cabinet is connected with the output end of the regulated power supply; the field control cabinet is composed of a digital video optical transceiver and a power supply device, and the image The signal is transmitted to the central control cabinet in the control room through the optical cable; the central control cabinet is composed of a digital video optical transceiver and a control host, and the signal is photoelectrically converted in the central control cabinet and sent to the display screen to display the operating status of each air outlet; its characteristics Yes: the camera device is the camera device described in claim 2, each tuyere of the blast furnace is equipped with a camera device, and a gas supply system is also arranged, the gas supply system includes a gas supply main air pipe, bronchus and gas bag, The seamless steel pipe used for the air supply main air pipe is laid along the lower platform of the hot air pipe, and an air bag is connected to the output end of the air supply main air pipe. The other end of the bronchus is connected with another air bag, and an electric contact pressure gauge capable of alarming is installed in the other air bag, and each camera device is connected with the bronchus through a decompression filter valve and a ball valve in turn. 6. The blast furnace tuyere monitoring system according to claim 5, characterized in that: the reflection rate of the spectroscopic glass of the camera device is 45%-55%, the light transmittance of the optical filter is 4%-6%, The light transmittance of the tuyere glass is 95%-98%, and the light transmittance of the observation mirror is 95%-98%. %-3%; the focal length of the lens of the video camera described in the camera device is 4.1cm-73.8cm, the optical zoom is 18 times, the CCD size is 1/4, the amount of light is F2.0-F3.0, and the digital zoom is 12 times.

Images