High-temperature-resistant camera device for hot-dip operation furnace nose

Abstract

The utility model relates to the field of plating of metal materials, in particular to a high-temperature-resistant camera device for a hot-dip operation furnace nose. The high-temperature-resistant camera device for the hot-dip operation furnace nose comprises a furnace nose (1) and is characterized by further comprising at least two monitoring units (2), and the monitoring units (2) are sequentially fixed to the side wall of the furnace nose (1) and symmetrically arranged around the central axis of the furnace nose (1); the monitoring unit (2) comprises a camera (21), a sleeve (22), a front purging pipe (23), a rear purging pipe (24), a transparent observation plate (25) and an illuminating lamp (26), the camera (21) and the sleeve (22) are arranged on the side wall of the furnace nose (1) in a penetrating manner, a lens of the camera (21) is arranged in the furnace nose (1), the sleeve (22) is arranged on one side of the camera (21), the front half part of the sleeve (22) is arranged in the side wall of the furnace nose (1), and the rear half part of the sleeve (22) is arranged outside the furnace nose (1). The blowing device is good in blowing effect, and the hot dipping quality is improved.

Description

Technical Field

[0001] This utility model relates to the field of metal material plating, specifically a high-temperature resistant camera device for the nose of a hot-dip galvanizing furnace. Background Technology

[0002] The furnace nose high-temperature high-definition camera system is used to acquire high-definition video images of the furnace nose in real time, meeting the requirements of process technicians and production personnel to monitor the flow of zinc ash, zinc slag, and zinc liquid inside the furnace nose in real time. When the process conditions inside the furnace nose are out of balance or tend to become serious, targeted measures can be taken to adjust them, eliminating or reducing quality defects such as zinc ash, zinc slag, slag adhesion, and scratches in production. The surface quality control of strip steel can be carried out as early as possible, effectively improving the product qualification rate and reducing losses.

[0003] The furnace nose high-temperature high-definition camera system employs ultra-wide dynamic range low-light high-definition imaging and zinc ash protection technology, using nitrogen cooling protection to ensure the camera probe operates continuously in the high-temperature environment inside the furnace nose. The camera probe utilizes passive eddy current cooling technology and a multi-layer cooling purging and exhaust structure, minimizing its impact on the atmosphere inside the furnace nose. The newly developed high-temperature resistant high-definition pinhole lens with wide-spectrum imaging characteristics can still provide clear images even with changes in ambient lighting.

[0004] The furnace nose high-temperature high-definition camera system consists of a high-temperature high-definition camera probe (high-definition camera, high-temperature resistant high-definition pinhole lens, air-cooled protective sleeve, etc.), an air-cooling control device (vortex cooler, filter pressure reducing valve, etc.), an electrical control box, main control equipment (hard disk recorder, monitor), and signal transmission.

[0005] However, this configuration is currently only applicable to galvanizing lines and low-aluminum-zinc and low-aluminum-magnesium products. It can usually guarantee the clarity of the camera for one production cycle. When the machine is stopped at the end of one production cycle, the lighting glass can be wiped and used for the next production cycle.

[0006] For production lines producing high-alumina zinc-alumina-magnesium alloys, the high aluminum content results in a significant amount of zinc ash in the furnace nose section. With this configuration, the image becomes blurry after 2-3 days and completely unclear after 5-6 days. Since the production cycle for high-alumina zinc and high-alumina-magnesium alloys is typically 10-12 days, half of this production cycle means that the flow of molten zinc inside the furnace nose cannot be clearly observed. Production process personnel cannot make accurate judgments and adjust process parameters, leading to quality defects, a decline in the surface quality of the strip steel, and an impact on the product qualification rate.

[0007] Chinese invention patent application No. 105986210A, published on October 5, 2016, discloses an integrated safety protection device for the internal lighting of a furnace nose, including a water-cooled protective cover, a front cover plate, a rear cover plate, a lighting lamp, a guide groove, and a lamp mounting plate. The water-cooled protective cover has a cylindrical structure with a double-layered sidewall and a cooling water interlayer in between. A viewing hole is located in the center of its top surface, and a rear cover plate is installed on its bottom surface. The front cover plate is located at the viewing hole, and the lighting lamp is mounted on the front cover plate. A guide groove is provided on the inner wall of the water-cooled protective cover, and the lamp mounting plate is installed inside the guide groove, fixing the lighting lamp to the front cover plate. This invention can provide effective illumination for a long time inside the furnace nose, enabling the camera device to obtain clear and stable images of the furnace nose interior. However, this invention relates to lighting and protection, but does not address the layout of the internal imaging system (camera) or provide blowing or cleaning measures to address the problem of zinc ash adhesion on the transparent viewing window.

[0008] Chinese utility model patent No. 209823858U, published on December 20, 2019, discloses a high-temperature heat insulation cover for a camera with a furnace nose design. The cover includes a first high-temperature heat insulation cover and a second high-temperature heat insulation cover located at its bottom. The first and second high-temperature heat insulation covers are integrally formed. A mounting plate is provided at the end of the first high-temperature heat insulation cover away from the second high-temperature heat insulation cover. A horizontally arranged connecting plate is connected inside the first high-temperature heat insulation cover. This utility model can prevent the camera and lens from being exposed to high temperatures, thus extending their service life. The cooling pipes 1 and 2 allow for internal airflow circulation through cooling gas inlets, continuously reducing the temperature inside the first and second high-temperature heat insulation covers, further protecting the equipment's lifespan. Furthermore, the high-temperature resistant insulation cotton provided inside the first and second high-temperature heat insulation covers enhances the heat insulation effect. However, this utility model only provides passive heat insulation and cooling protection for the camera, without integrating lighting components, or setting a transparent observation window and a blowing system, making the complete solution for zinc ash cleaning and image acquisition incomplete.

[0009] Chinese Utility Model Patent No. 222053234U, published on November 22, 2024, discloses a high-temperature camera device for monitoring the zinc liquid level inside the nose of a hot-dip galvanizing furnace. The device features a camera housed within the inner cavity of a double-layered mounting cylinder. Auxiliary lighting lamps are spaced circumferentially at intervals on the front end face of the inner cavity. A high-temperature resistant glass plate is positioned on the front end face of the outer ring of the double-layered mounting cylinder. The partition between the two layers of the cylinder is connected to a heat-insulating and cooling protective gas, ensuring that the temperature inside the cylinder does not exceed the camera's operating temperature. A purging gas is also connected to the inner cavity of the double-layered mounting cylinder to purge the camera lens. This utility model allows for real-time monitoring of the cleanliness of the zinc liquid level, the presence of zinc slag, and the position of the strip steel within the furnace nose. It also features long-term operation, easy disassembly and maintenance, improved galvanized sheet quality, and provides a visual basis for product defect analysis in the furnace nose area, equipment maintenance cycle planning, and furnace nose position adjustment. Although this utility model has a single-path purging function, when the amount of zinc ash adhering to the high-alumina zinc and high-alumina magnesium production lines increases dramatically, the single purging channel is prone to local blockage, making it difficult to guarantee clear imaging throughout the 10-12 day production cycle. Utility Model Content

[0010] In order to overcome the shortcomings of the existing technology and provide a hot-dip galvanizing auxiliary device with good purging effect and improved hot-dip galvanizing quality, this utility model discloses a high-temperature resistant camera device for the nose of a hot-dip galvanizing furnace.

[0011] This utility model achieves its invention objective through the following technical solution:

[0012] A high-temperature resistant camera device for a furnace nose in hot-dip galvanizing operations includes a furnace nose, characterized in that it further includes monitoring units, at least two of which are sequentially fixed to the side wall of the furnace nose and symmetrically arranged around the central axis of the furnace nose.

[0013] The monitoring unit includes a camera, a sleeve, a front purge pipe, a rear purge pipe, a transparent observation panel, and lighting.

[0014] Both the camera and the sleeve are installed on the side wall of the furnace nose. The lens of the camera is located inside the furnace nose, and the sleeve is located on one side of the camera. The front half of the sleeve is located inside the side wall of the furnace nose, and the rear half of the sleeve is located outside the furnace nose.

[0015] The front purge pipe is embedded in the side wall of the furnace nose. The blowing end of the front purge pipe is connected to the front half of the sleeve. The rear purge pipe is fixed on the side wall of the rear half of the sleeve. The blowing end of the rear purge pipe is connected to the rear half of the sleeve. The air inlet ends of both the front and rear purge pipes are connected to the air source.

[0016] The transparent observation plate is fixed to the rear end face of the rear half of the sleeve;

[0017] The lighting lamp is fixed on the rear half of the sleeve, with the illuminating end of the lamp facing the transparent observation plate.

[0018] The high-temperature resistant camera device for the nose of a hot-dip galvanizing furnace is characterized in that: the monitoring unit further includes a ring-shaped graphite gasket, a bolt-nut assembly, and a retaining ring.

[0019] The annular graphite gasket is clamped to the rear half of the sleeve by bolt-nut assemblies at both ends. The air blowing end of the rear purge pipe passes through the fixing ring to form an air hood, which purges in front of the transparent observation plate to prevent zinc ash from adhering to the transparent observation plate.

[0020] The high-temperature resistant camera device for the nose of a hot-dip galvanizing furnace is characterized in that: the sleeve includes a front sleeve and a rear sleeve.

[0021] The front sleeve, as the front half of the sleeve, is located inside the side wall of the furnace nose, and the rear sleeve, as the rear half of the sleeve, is located outside the furnace nose. The front sleeve and the rear sleeve are connected by a flange or by threads.

[0022] When this invention is in use, the lighting lamp shines into the furnace nose, and the light passes through the high-temperature resistant glass to provide a light source for the camera. The camera monitors the hot-dip galvanizing operation inside the furnace nose in real time. At this time, the front and rear purge pipes blow airflow into the high-temperature resistant glass to remove zinc ash and other dust adhering to the transparent observation plate, thus ensuring the effective implementation of lighting and observation.

[0023] This invention adds a sleeve to the illumination area of ​​the high-temperature camera, keeping the high-temperature resistant glass away from the furnace nose atmosphere containing zinc ash, thus reducing the probability of zinc ash adhering to the high-temperature resistant glass. At the same time, a purge air path is added between the sleeve and the transparent observation plate, making it even less likely for zinc ash to adhere to the high-temperature resistant glass. This overcomes the harsh environment of high zinc ash content inside the furnace nose of high-aluminum zinc and high-aluminum magnesium products, meets the actual needs of a production cycle, and solves the problem of short service life of high-temperature cameras when producing high-aluminum zinc and high-aluminum magnesium products.

[0024] This invention has the following advantages: it is particularly suitable for special environments where high-alumina zinc and high-alumina magnesium products generate a lot of zinc ash. It can ensure that the high-temperature camera can always clearly see the flow of zinc liquid inside the furnace nose during a production cycle, which meets the requirements of process technology and production personnel to monitor the flow of zinc ash and zinc liquid inside the furnace nose in real time. It provides an advantageous monitoring means for production process personnel to make accurate judgments and adjust process parameters. Attached Figure Description

[0025] Figure 1 This is a structural schematic diagram of the present invention.

[0026] Figure 2 This is an installation layout diagram of this utility model on the production site. Detailed Implementation

[0027] The present invention will be further illustrated by specific embodiments below. Example

[0028] A high-temperature resistant camera device for a furnace nose in hot-dip galvanizing operations includes a furnace nose 1, characterized in that it further includes monitoring units 2, of which there are at least two, each monitoring unit 2 being sequentially fixed to the side wall of the furnace nose 1 and symmetrically arranged around the central axis of the furnace nose 1.

[0029] Monitoring unit 2 includes a camera 21, a sleeve 22, a front purge pipe 23, a rear purge pipe 24, a transparent observation panel 25, and a lighting lamp 26.

[0030] Both the camera 21 and the sleeve 22 are installed on the side wall of the furnace nose 1. The lens of the camera 21 is located inside the furnace nose 1, and the sleeve 22 is located on one side of the camera 21. The front half of the sleeve 22 is located inside the side wall of the furnace nose 1, and the rear half of the sleeve 22 is located outside the furnace nose 1.

[0031] The front purge pipe 23 is embedded in the side wall of the furnace nose 1. The blowing end of the front purge pipe 23 is connected to the front half of the sleeve 22. The rear purge pipe 24 is fixed on the side wall of the rear half of the sleeve 22. The blowing end of the rear purge pipe 24 is connected to the rear half of the sleeve 22. The air inlet ends of both the front purge pipe 23 and the rear purge pipe 24 are connected to a gas source, which is generally low-pressure nitrogen.

[0032] The transparent observation plate 25 is fixed to the rear end face of the rear half of the sleeve 22. The transparent observation plate 25 is made of high temperature resistant glass.

[0033] The lighting lamp 26 is fixed on the rear half of the sleeve 22, and the illuminating end of the lighting lamp 26 faces the transparent observation plate 25.

[0034] In this embodiment, the monitoring unit 2 also includes an annular graphite gasket 27, a bolt-nut assembly 28, and a fixing ring 29. The annular graphite gasket 27 is clamped to the rear half of the sleeve 22 by the bolt-nut assemblies 28 at both ends. The air blowing end of the rear purge pipe 24 passes through the fixing ring 29 to form an air hood, which purges in front of the transparent observation plate 25 to prevent zinc ash from adhering to the transparent observation plate 25.

[0035] In this embodiment: the sleeve 22 includes a front sleeve 221 and a rear sleeve 222.

[0036] The front sleeve 221, as the front half of the sleeve 22, is located inside the side wall of the furnace nose 1, and the rear sleeve 222, as the rear half of the sleeve 22, is located outside the furnace nose 1. The front sleeve 221 and the rear sleeve 222 are connected by a flange or by a thread.

[0037] When using this embodiment, as follows: Figure 1 and Figure 2 As shown: The lighting lamp 26 shines into the interior of the furnace nose 1, and the light provides a light source to the camera 21 through the transparent observation plate 25. The camera 21 monitors the hot-dip galvanizing operation inside the furnace nose 1 in real time. At this time, the front purge pipe 23 and the rear purge pipe 24 blow airflow onto the transparent observation plate 25 to remove zinc ash and other dust adhering to the transparent observation plate 25, so as to maintain the effective implementation of lighting and observation.

Claims

1. A high-temperature-resistant camera device for a hot dip coating installation nozzle, comprising a nozzle (1), characterized in that: The monitoring unit (2) is arranged symmetrically around the central axis of the furnace snout (1) and comprises a camera (21), a sleeve (22), a front blowing pipe (23), a rear blowing pipe (24), a transparent observation plate (25) and a lighting lamp (26). The camera (21) and the sleeve (22) are arranged on the side wall of the furnace snout (1), the lens of the camera (21) is arranged inside the furnace snout (1), the sleeve (22) is arranged on one side of the camera (21), the front half of the sleeve (22) is arranged in the side wall of the furnace snout (1), and the rear half of the sleeve (22) is arranged outside the furnace snout (1). The front blowing pipe (23) is embedded in the side wall of the furnace snout (1), the blowing end of the front blowing pipe (23) is connected with the front half of the sleeve (22), the rear blowing pipe (24) is fixed on the side wall of the rear half of the sleeve (22), the blowing end of the rear blowing pipe (24) is connected with the rear half of the sleeve (22), and the gas inlet ends of the front blowing pipe (23) and the rear blowing pipe (24) are connected with a gas source. The transparent observation plate (25) is fixed on the rear end face of the rear half of the sleeve (22). The lighting lamp (26) is fixed on the rear half of the sleeve (22), and the irradiation end of the lighting lamp (26) faces the transparent observation plate (25). The monitoring unit (2) further comprises a ring-shaped graphite gasket (27), a bolt-nut assembly (28) and a fixing ring (29).

2. The high temperature resistant camera for a hot dip operation furnace nose as claimed in claim 1, characterized in that: The ring-shaped graphite gasket (27) is clamped on the rear half of the sleeve (22) through the bolt-nut assemblies (28) at both ends, and the blowing end of the rear blowing pipe (24) forms an air cover after passing through the fixing ring (29). The sleeve (22) comprises a front sleeve (221) and a rear sleeve (222).

3. The high-temperature-resistant camera device for a hot-dip plating nose of a workpiece according to claim 1 or 2, characterized by: The front sleeve (221) is arranged in the side wall of the furnace snout (1) as the front half of the sleeve (22), the rear sleeve (222) is arranged outside the furnace snout (1) as the rear half of the sleeve (22), and the front sleeve (221) and the rear sleeve (222) are connected through flanges or threads. ​

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