A high-temperature-resistant camera device for a furnace

Abstract

The present application relates to the technical field of furnace camera protection, in particular to a high-temperature-resistant camera device for a furnace, comprising a furnace, a mounting base for mounting a camera is fixedly arranged on the inner wall of the furnace, an assembly component is arranged on the mounting base, a trigger component is arranged at the side end of the assembly component, a compensation component with a fixed threaded rod is arranged above the trigger component, and an air curtain component is arranged at the side end of the compensation component and located above the camera. Through the work of the compensation component and the air curtain component, the effect of self-adaptive temperature difference compensation, stable installation and lens self-protection is achieved.

Description

Technical Field

[0001] This invention relates to the field of furnace body camera protection technology, specifically a high-temperature resistant camera device for furnace chambers. Background Technology

[0002] The furnace is the core working chamber of thermal equipment such as industrial boilers, kilns, and heat treatment furnaces. Its interior is subjected to harsh conditions such as high temperature, high pressure, high dust, and strong heat radiation for a long time. In order to monitor the combustion status, material conditions, and equipment operation inside the furnace in real time, a special camera device is usually installed on the inner wall of the furnace to achieve uninterrupted visual online monitoring and ensure the safe and stable operation of the equipment.

[0003] Currently, most existing furnace camera devices adopt a fixed installation structure with a base and threaded rod. During long-term use, firstly, the internal temperature of the furnace cavity frequently undergoes drastic temperature changes. Under the cyclical action of high-temperature temperature differences, gaps can easily form at the mating surfaces of the threaded rod and the base, leading to problems such as loosening, misalignment, and shaking of the camera device. This directly causes camera monitoring point shifts and image shakiness, severely affecting the accuracy and effectiveness of furnace monitoring data, increasing equipment maintenance costs and safety hazards. Secondly, the furnace continuously generates [temperatures] during operation. The large amounts of flue gas, dust, carbon black, and other impurities in existing camera devices mean that the lens face is directly exposed to the harsh environment of the furnace. Flue gas and dust easily and continuously adhere to and accumulate on the lens surface, causing the lens to become blurry and light transmittance to decrease. This results in dark, obstructed, and unclear images, making it impossible to clearly capture the detailed working conditions inside the furnace. At the same time, it increases the workload of manual maintenance and cannot meet the needs of long-term, uninterrupted, and high-precision visual monitoring of industrial furnaces. There is an urgent need for a furnace camera device that can adapt to temperature difference compensation, is stably installed, and has a lens self-protection function. Summary of the Invention

[0004] The purpose of this invention is to provide a high-temperature resistant camera device for a furnace, thereby solving the problems mentioned in the background art. To achieve the above objective, this invention provides the following technical solution: a high-temperature resistant camera device for a furnace, comprising a furnace, a mounting base for mounting a camera fixedly provided on the inner wall of the furnace, an assembly assembly provided on the mounting base, a trigger assembly provided on the side end of the assembly assembly, a compensation assembly for fixing a threaded rod provided above the trigger assembly, and an air curtain assembly provided on the side end of the compensation assembly and located on the camera.

[0005] Preferably, the assembly component includes an assembly hole corresponding to the flange base position of the camera, the inner wall of the assembly hole is threaded to the threaded rod, the outer side of the assembly hole is provided with an annular groove, the top of the annular groove is provided with a plurality of sliding grooves, the plurality of sliding grooves are evenly arranged around the assembly hole, and the top of the annular groove is connected to the bottom of the plurality of sliding grooves.

[0006] Preferably, the triggering assembly includes an annular trigger frame slidably disposed within an annular slot. Several supports are evenly distributed at the bottom of the annular trigger frame. The bottom of each support is movably connected to the bottom of the annular slot via a return spring. Each support has a horizontally positioned pressure plate at its bottom side. The end of the pressure plate furthest from the support is located within an assembly hole. The pressure plate slides vertically against the inner wall of the assembly hole. The assembly hole and the threaded area of ​​the threaded rod are located between the pressure plate and the sliding slot. Several vertically positioned wedge-shaped blocks are evenly distributed at the top of the annular trigger frame.

[0007] Preferably, the compensation component includes a limiting arc-shaped member located in each sliding groove. The limiting arc-shaped member slides in conjunction with the inner wall of the sliding groove. The inner side of the limiting arc-shaped member engages with the smooth area of ​​the threaded rod. The side of the limiting arc-shaped member away from the assembly hole is movably connected to the inner wall of the sliding groove via a horizontally arranged spring telescopic rod. The spring telescopic rod is initially in a compressed state. An auxiliary frame is provided on the side of the limiting arc-shaped member away from the assembly hole. A rolling wheel is provided at the bottom of the auxiliary frame. The side end of the rolling wheel abuts against the inclined surface of the wedge block. In the initial state, the annular trigger frame presses against each rolling wheel through the wedge block under the action of the reset spring, causing each rolling wheel to compress the spring telescopic rod through the arc-shaped limiting member. The top side end of the limiting arc-shaped member is arc-shaped. An unlocking ring that can be elastically moved is provided around the top of the threaded rod.

[0008] Preferably, the air curtain assembly includes arc-shaped vents evenly distributed around the camera end, the outlet of the arc-shaped vents is inclined, the inclined direction of the arc-shaped vents is towards the camera end, the interior of the arc-shaped vents is connected to the air storage cavity inside the camera, a connecting pipe is connected to the center of the end of the air storage cavity away from the arc-shaped vents, and the other end of the connecting pipe is connected to the outside of the furnace through the camera and the mounting base.

[0009] Preferably, the end of the arc-shaped vent that connects to the gas storage cavity is funnel-shaped.

[0010] Preferably, a one-way valve is provided inside the end of the connecting pipe located outside the furnace, and a filter screen is provided inside the connecting pipe.

[0011] Preferably, a sealing gasket is provided around the top of the assembly hole. The sealing gasket is located on the mating surface between the flange base and the assembly component to seal the assembly gap and prevent furnace flue gas from leaking out of the assembly hole gap.

[0012] Compared with the prior art, the beneficial effects of the present invention are as follows: In this invention, before use, the camera is installed on the mounting base via the flange seat, and then the threaded rod is installed on the assembly assembly. After the threaded rod is assembled, it presses against the linkage trigger assembly, which drives the compensation assembly to work. The compensation assembly provides multi-point support and limitation from all around the threaded rod, offsetting the deformation gaps caused by the different coefficients of thermal expansion and contraction of the threaded rod and the mounting base under high-temperature conditions. This prevents the gaps from causing the camera to loosen or shift its position. During the operation of the camera, the air curtain assembly forms a surrounding protective air curtain on the camera's image end surface. The high-speed airflow blocks the smoke and dust in the furnace from adhering to the lens, ensuring the clarity of the image.

[0013] In this invention, the device forms a mechanical linkage structure through the assembly component, trigger component, and compensation component. After the threaded rod is assembled, the compensation component is automatically triggered to work, providing all-round support and limiting around the threaded rod. It can adapt to the alternating hot and cold temperature conditions in the furnace and compensate for the assembly gap caused by the difference in thermal expansion and contraction coefficients between the threaded rod and the mounting base in real time. This completely avoids the problems of camera loosening, offset, and shaking caused by temperature difference deformation, ensuring long-term accurate and stable camera monitoring points, greatly improving the accuracy and reliability of furnace visual monitoring, and reducing potential safety hazards in equipment operation.

[0014] In this invention, the device is equipped with an air curtain component at the camera end. During operation, a uniform and stable protective air curtain can be formed on the lens surface. The high-speed airflow forms an isolation barrier, effectively preventing impurities such as flue gas, dust, and carbon black inside the furnace from adhering to and accumulating on the lens end face. This fundamentally avoids problems such as blurry images, obstruction, and image quality degradation caused by lens contamination. It eliminates the need for frequent shutdowns and lens cleaning, enabling long-term, uninterrupted high-definition monitoring of the furnace camera device. This effectively improves equipment operating efficiency and reduces the frequency and cost of manual maintenance.

[0015] In this invention, the device adopts an assembly-triggered linkage structure. Only the installation of the camera flange and the assembly of the threaded rod are required to automatically drive the compensation component to complete the limit compensation. There is no need for manual debugging and calibration of the compensation structure. The assembly process is simple and efficient, and it is suitable for the narrow and complex installation space inside the furnace. At the same time, the overall structure has a high degree of integration and strong linkage. The purely mechanical structure is stable and reliable, with no risk of electrical control failure. It is suitable for the harsh working conditions of the furnace with high temperature and high interference, and has a longer service life. Attached Figure Description

[0016] Figure 1This is a three-dimensional structural diagram of the present invention; Figure 2 This is a partial three-dimensional structural diagram of the present invention. Figure 1 ; Figure 3 This is a partial three-dimensional structural diagram of the present invention. Figure 2 ; Figure 4 This is a cross-sectional view of the mounting base in this invention. Figure 1 ; Figure 5 for Figure 4 Enlarged view of region A in the middle; Figure 6 This is a cross-sectional view of the mounting base in this invention. Figure 2 ; Figure 7 This is a partial three-dimensional structural diagram of the triggering component and the compensation component in this invention; Figure 8 This is a partial three-dimensional structural diagram of the camera and air curtain assembly in this invention; Figure 9 for Figure 8 Enlarged view of region B in the middle; Figure 10 This is a partial cross-sectional view of the camera in this invention.

[0017] In the diagram: 1. Furnace chamber; 2. Camera; 3. Mounting base; 4. Assembly assembly; 41. Flange base; 42. Assembly hole; 43. Annular slot; 44. Sliding groove; 5. Trigger assembly; 51. Annular trigger frame; 52. Bracket; 53. Return spring; 54. Pressure plate; 55. Wedge block; 6. Threaded rod; 7. Compensation assembly; 71. Limiting arc-shaped component; 72. Smooth rod; 73. Spring telescopic rod; 74. Auxiliary frame; 75. Rolling wheel; 76. Unlocking ring; 8. Air curtain assembly; 81. Arc-shaped vent; 82. Gas storage cavity; 83. Connecting pipe. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] Please see Figures 1 to 10The present invention provides a technical solution: a high-temperature resistant camera device for a furnace, comprising a furnace 1, wherein a mounting base 3 for mounting a camera 2 is fixedly provided on the inner wall of the furnace 1, an assembly component 4 is provided on the mounting base 3, a trigger component 5 is provided on the side end of the assembly component 4, a compensation component 7 for fixing a threaded rod 6 is provided above the trigger component 5, and an air curtain component 8 is provided on the side end of the compensation component 7 and is located on the camera 2.

[0020] In this embodiment, as Figures 1 to 7 As shown, the assembly component 4 includes an assembly hole 42 corresponding to the position of the flange base 41 of the camera 2. The inner wall of the assembly hole 42 is threadedly engaged with the threaded rod 6. The outer side of the assembly hole 42 is provided with an annular groove 43. The top of the annular groove 43 is provided with a plurality of sliding grooves 44. The plurality of sliding grooves 44 are evenly arranged around the assembly hole 42. The top of the annular groove 43 is connected to the bottom of the plurality of sliding grooves 44. The trigger assembly 5 includes an annular trigger frame 51 slidably disposed in an annular slot 43. Several supports 52 are evenly distributed at the bottom of the annular trigger frame 51. The bottom of each support 52 is movably connected to the bottom of the annular slot 43 through a return spring 53. Each support 52 has a horizontally arranged pressure plate 54 at the side end of its bottom. The end of the pressure plate 54 away from the support 52 is located in the assembly hole 42. The pressure plate 54 slides up and down with the inner wall of the assembly hole 42. The threaded engagement area between the assembly hole 42 and the threaded rod 6 is located between the pressure plate 54 and the sliding groove 44. Several vertically arranged wedge blocks 55 are evenly distributed at the top of the annular trigger frame 51. The compensation component 7 includes a limiting arc-shaped member 71 located in each sliding groove 44. The limiting arc-shaped member 71 slides in cooperation with the inner wall of the sliding groove 44. The inner side of the limiting arc-shaped member 71 cooperates with the area of ​​the smooth rod 72 of the threaded rod 6. The side of the limiting arc-shaped member 71 away from the mounting hole 42 is movably connected to the inner wall of the sliding groove 44 through a horizontally arranged spring telescopic rod 73. The initial state of the spring telescopic rod 73 is a compressed state. An auxiliary frame 74 is provided on the side of the limiting arc-shaped member 71 away from the mounting hole 42. A rolling wheel 75 is provided at the bottom of the auxiliary frame 74. The side end of the rolling wheel 75 abuts against the inclined surface of the wedge block 55. In the initial state, the annular trigger frame 51 presses against each rolling wheel 75 through the wedge block 55 under the action of the reset spring 53, causing each rolling wheel 75 to compress the spring telescopic rod 73 through the arc-shaped limiting member. The top side end of the limiting arc-shaped member 71 is arc-shaped. The top of the threaded rod 6 is provided with an elastically movable unlocking ring 76.

[0021] In this embodiment, as Figures 7 to 10As shown, the air curtain assembly 8 includes arc-shaped vents 81 evenly distributed around the camera end of the camera 2. The outlet of the arc-shaped vents 81 is inclined, and the inclined direction of the arc-shaped vents 81 is towards the camera end of the camera 2. The interior of the arc-shaped vents 81 is connected to the air storage cavity 82 inside the camera 2. A connecting pipe 83 is connected to the center of the end of the air storage cavity 82 away from the arc-shaped vents 81. The other end of the connecting pipe 83 is connected to the outside of the furnace 1 through the camera 2 and the mounting base 3. The end of the arc-shaped vent 81 that connects to the air storage cavity 82 is funnel-shaped; The connecting pipe 83 is equipped with a one-way valve at one end outside the furnace 1, and a filter screen is installed inside the connecting pipe 83; A sealing gasket is provided around the top of the assembly hole 42. The sealing gasket is located on the mating surface between the flange base 41 and the assembly component 4 to seal the assembly gap and prevent the flue gas in the furnace 1 from leaking out of the gap in the assembly hole 42.

[0022] The invention provides the following usage method and advantages: A high-temperature resistant camera device for furnaces, the working process of which is as follows: like Figures 1 to 10 As shown, camera 2 is installed onto mounting base 3 via flange seat, and then threaded rod 6 is installed into assembly hole 42. During the assembly of threaded rod 6 to the bottom, pressure plate 54 is squeezed, causing pressure plate 54 to press down and squeeze return spring 53. In turn, bracket 52 drives annular trigger frame 51 to move down along annular slot 43, thereby driving several wedge blocks 55 away from rolling wheel 75. At this time, rolling wheel 75 is no longer obstructed, and under the action of spring telescopic rod 73, limiting arc part 71 moves along sliding groove 44, and then comes into contact with and abuts against the smooth rod 72 area of ​​threaded rod 6, realizing multi-point support from all sides of threaded rod 6. The limiters compensate for the deformation gaps caused by the different coefficients of thermal expansion and contraction of the threaded rod 6 and the mounting base 3 under high-temperature conditions, preventing the camera 2 from becoming loose or shifting due to the gaps. When the camera 2 needs to be disassembled for maintenance, the unlocking ring 76 can be manually moved down along the top of the threaded rod 6, thereby squeezing several limit arc-shaped parts 71 away. Then the threaded rod 6 is disassembled. At this time, the pressure plate 54 loses its limiting force and resets under the action of the reset spring 53. Then, the wedge block 55 drives each rolling wheel 75 to reset, so that each limit arc-shaped part 71 completes the reset, improving the ease of use of this device. During normal operation of furnace 1, the interior of furnace 1 is usually under negative pressure. At this time, camera 2 is in working condition. Through the pressure difference between the interior of furnace 1 and the outside, outside air quickly flows into the gas storage cavity 82 through the connecting pipe 83 and is stabilized and evenly distributed inside the gas storage cavity 82, so that the circumferential pressure of the airflow is consistent, avoiding local air curtain discontinuity and flow deviation. The outside airflow then flows out along the arc-shaped vent 81 through the Coanda effect and accelerates through the trumpet-shaped end. The flow velocity drops to zero when they collide with each other at the center in front of the camera end. Since the interior of furnace 1 is under negative pressure, under the action of pressure gradient, the outside airflow spreads out radially around the camera end, forming a positive isolation air curtain, thus forming a full-coverage, outward-flowing positive pressure air curtain that blocks the flue gas in furnace 1, thereby preventing the smoke and dust and high-temperature dust in furnace 1 from adhering to the lens and ensuring the clarity of the camera image. By using a one-way valve, backflow of flue gas into the furnace 1 is prevented, ensuring the continuous stability of the passive air curtain. At the same time, the filter screen makes the annular air curtain formed on the camera end surface purer, improving the practicality of the device.

[0023] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high-temperature resistant camera device for a furnace, comprising a furnace (1), wherein the inner wall of the furnace (1) is fixedly provided with a mounting base (3) for mounting a camera (2); Its features are: The mounting base (3) is provided with an assembly component (4), the side end of the assembly component (4) is provided with a trigger component (5), the upper part of the trigger component (5) is provided with a compensation component (7) for fixing the threaded rod (6), and the side end of the compensation component (7) is provided with an air curtain component (8) and located on the camera (2).

2. The high-temperature resistant camera device for a furnace according to claim 1, characterized in that: The assembly component (4) includes an assembly hole (42) corresponding to the position of the flange base (41) of the camera (2). The inner wall of the assembly hole (42) is threaded to the threaded rod (6), and the outer side of the assembly hole (42) is provided with an annular groove (43). The top of the annular slot (43) is provided with several sliding grooves (44). Several sliding grooves (44) are evenly arranged around the assembly hole (42); The top of the annular slot (43) is connected to the bottom of several sliding slots (44).

3. The high-temperature resistant camera device for a furnace according to claim 2, characterized in that: The triggering component (5) includes an annular trigger frame (51) that is slidably disposed in the annular slot (43); The bottom of the annular trigger frame (51) is evenly provided with several supports (52), and the bottom of the supports (52) is movably connected to the bottom of the annular slot (43) through a reset spring (53). Each of the brackets (52) has a horizontally arranged pressure plate (54) at the bottom side end, and the end of the pressure plate (54) away from the bracket (52) is located in the assembly hole (42); The pressure plate (54) slides vertically and vertically with the inner wall of the assembly hole (42), and the threaded engagement area between the assembly hole (42) and the threaded rod (6) is located between the pressure plate (54) and the sliding groove (44). The top of the annular trigger frame (51) is evenly provided with several vertically arranged wedge-shaped blocks (55).

4. A high-temperature resistant camera device for a furnace according to claim 3, characterized in that: The compensation component (7) includes a limiting arc-shaped element (71) located in each sliding groove (44). The limiting arc-shaped part (71) slides in cooperation with the inner wall of the sliding groove (44), and the inner side of the limiting arc-shaped part (71) cooperates with the area of ​​the threaded rod (6) smooth rod (72); The side of the limiting arc-shaped component (71) away from the assembly hole (42) is movably connected to the inner wall of the sliding groove (44) via a horizontally arranged spring telescopic rod (73); The initial state of the spring telescopic rod (73) is the compressed state, and the side of the limiting arc-shaped part (71) away from the assembly hole (42) is provided with an auxiliary frame (74). The bottom of the auxiliary frame (74) is provided with a roller (75), and the side end of the roller (75) abuts against the inclined surface of the wedge block (55); In the initial state, the annular trigger frame (51) presses against each rolling wheel (75) through the wedge block (55) under the action of the reset spring (53), causing each rolling wheel (75) to compress the spring telescopic rod (73) through the arc-shaped limiting member. The top side of the limiting arc-shaped component (71) is arc-shaped, and the top of the threaded rod (6) is provided with an unlocking ring (76) that can be elastically moved.

5. A high-temperature resistant camera device for a furnace according to claim 1, characterized in that: The air curtain assembly (8) includes arc-shaped ventilation openings (81) evenly distributed around the camera end of the camera (2); The outlet of the arc-shaped vent (81) is inclined, and the inclined direction of the arc-shaped vent (81) is towards the camera end of the camera (2); The interior of the arc-shaped vent (81) is connected to the air storage cavity (82) inside the camera (2); A connecting pipe (83) is provided at the center of the end of the gas storage cavity (82) away from the arc-shaped vent (81). The other end of the connecting pipe (83) is connected to the outside of the furnace (1) through the camera (2) and the mounting base (3).

6. A high-temperature resistant camera device for a furnace according to claim 5, characterized in that: The end of the arc-shaped vent (81) that connects to the gas storage cavity (82) is horn-shaped.

7. A high-temperature resistant camera device for a furnace according to claim 5, characterized in that: The connecting pipe (83) is equipped with a one-way valve at one end outside the furnace (1), and a filter screen is provided inside the connecting pipe (83).

8. A high-temperature resistant camera device for a furnace according to claim 2, characterized in that: A sealing gasket is provided around the top of the assembly hole (42). The sealing gasket is located on the mating surface between the flange base (41) and the assembly component (4) to seal the assembly gap and prevent the flue gas in the furnace (1) from leaking out from the gap in the assembly hole (42).

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