High-temperature furnace wall heat insulation window structure of radar sensor

Abstract

The utility model relates to the field of steel production, in particular to a high-temperature furnace wall heat insulation window structure of a radar sensor. The structure is applied to a furnace wall and comprises an open window which is formed in the furnace wall and penetrates through the inner side and the outer side of the furnace wall, and a fixed frame is fixedly arranged in the open window; a radar sensor, a first heat-insulating wave-transmitting material, a second heat-insulating wave-transmitting material and a third heat-insulating wave-transmitting material are coaxially arranged on the fixed frame in the direction from the outer side to the inner side of the furnace wall; the heat-insulating properties of the first heat-insulating wave-transparent material, the second heat-insulating wave-transparent material and the third heat-insulating wave-transparent material are sequentially increased, and the inner side and the outer side of the furnace wall are sealed; the radar sensor is arranged on the outer side of the furnace and is made of triple heat insulation materials, the heat insulation performance of the radar sensor is sequentially increased from outside to inside, the window is sealed, and radar waves can penetrate through the radar sensor, so that the radar sensor can detect the edge position of running strip steel in the furnace to achieve the deviation correction function and does not need to work in the high-temperature environment in the furnace; and the device is not influenced by severe environment in the furnace, is convenient to maintain and has longer service life.

Description

Technical Field

[0001] The utility model relates to the field of iron and steel production, in particular to a heat-insulating window structure for a high-temperature furnace wall of a radar sensor. Background Art

[0002] In strip steel production lines such as continuous annealing units and continuous hot-dip galvanizing units in steel plants, there is usually a high-temperature vertical heating furnace with a furnace temperature reaching 650°C to 1100°C to heat and process strip steel. When the strip steel runs in this high-temperature annealing furnace, there are major safety problems of damaging the strip steel or the furnace due to deviation. In order to ensure the safe operation of the strip steel in the high-temperature furnace, a deviation correction device and a control system must be installed in the furnace to solve the problem of strip steel deviation.

[0003] Currently, the common practice is to directly install high-temperature-resistant capacitive or inductive in-furnace deviation correction sensors in a very harsh furnace environment to detect the deviation of the strip steel position, and then transmit the position deviation signal to the deviation correction device for deviation correction actions. This deviation correction detection method has three problems: (1) The sensor is easily affected by severe dust or metal oxides and other factors in the furnace and fails to alarm, sometimes causing the production line to stop suddenly and reducing production efficiency; (2) The sensor is very troublesome to repair. Once a failure occurs, it cannot be repaired immediately. It can only be taken out of the furnace for repair after the production line is stopped and the furnace temperature drops to normal temperature; (3) The sensor directly works in a high-temperature environment and needs to be made of expensive high-temperature-resistant materials, with high costs and short service life. Summary of the Utility Model

[0004] In order to overcome the above problems, the utility model provides a heat-insulating window structure for a high-temperature furnace wall of a radar sensor that installs a radar sensor outside the high-temperature furnace wall to detect the position of the strip steel in the furnace. The technical solution adopted by the utility model to solve its technical problems is as follows:

[0005] A heat-insulating window structure for a high-temperature furnace wall of a radar sensor is applied to a furnace wall. An opening is provided in the furnace wall that penetrates the inner and outer sides of the furnace wall, and a fixed frame is fixedly arranged in the opening. On the fixed frame, a radar sensor, a first heat-insulating wave-transmitting material, a second heat-insulating wave-transmitting material, and a third heat-insulating wave-transmitting material are coaxially arranged from the outside to the inside of the furnace wall. The heat-insulating performances of the first heat-insulating wave-transmitting material, the second heat-insulating wave-transmitting material, and the third heat-insulating wave-transmitting material increase in sequence, and seal the opening of the furnace wall.

[0006] Further, both the fixed frame and the radar sensor are provided with flanges, and the two are detachably fixedly connected through the flanges.

[0007] Further, a high-temperature-resistant gasket is arranged between the fixed frame and the radar sensor.

[0008] Furthermore, a sealing and heat-insulating material is provided between the first heat-insulating and wave-transmitting material, the second heat-insulating and wave-transmitting material, the third heat-insulating and wave-transmitting material and the inner wall of the window opening.

[0009] Furthermore, the heat-insulating performance of the sealing and heat-insulating material is greater than or equal to that of the third heat-insulating and wave-transmitting material.

[0010] Furthermore, a guiding inclined surface is provided on the fixing frame, the guiding inclined surface faces the inner side of the furnace wall, and extends from the third heat-insulating and wave-transmitting material to the inside of the furnace wall.

[0011] Furthermore, the radar sensor is provided with a cooling water circulation device to reduce the temperature of the radar sensor.

[0012] Furthermore, the number of such structures is greater than or equal to two, and they are symmetrically distributed on the circumferential side of the high-temperature furnace wall.

[0013] The beneficial effects of the present utility model are as follows:

[0014] This structure has a window opening penetrating the inner and outer sides of the furnace wall, and a fixing frame is fixedly arranged in the window opening; on the fixing frame, a radar sensor, a first heat-insulating and wave-transmitting material, a second heat-insulating and wave-transmitting material and a third heat-insulating and wave-transmitting material are coaxially arranged from the outer side to the inner side of the furnace wall; the heat-insulating performances of the first heat-insulating and wave-transmitting material, the second heat-insulating and wave-transmitting material and the third heat-insulating and wave-transmitting material increase in sequence, and the inner and outer sides of the furnace wall are sealed; the radar sensor is arranged outside the furnace, using triple heat-insulating materials, and the heat-insulating performance increases from the outside to the inside, sealing the window opening and allowing radar waves to penetrate, so that the radar sensor can detect the edge position of the strip steel running inside the furnace, and does not need to work in the high-temperature environment inside the furnace, is not affected by the harsh environment inside the furnace, is convenient for maintenance, and has a longer service life. Description of the Drawings

[0015] The following further describes the present utility model in conjunction with the drawings and specific embodiments, wherein:

[0016] Figure 1 is a sectional view of the present utility model;

[0017] Figure 2 is an exploded sectional view of the present utility model.

[0018] Figure 3 is a standard installation schematic diagram of the present utility model.

[0019] Marking of drawing numbers:

[0020] 100, furnace wall; 101, window opening;

[0021] 200. Fixed frame; 201. Radar sensor; 202. First heat-insulating and wave-transmitting material; 203. Second heat-insulating and wave-transmitting material; 204. Third heat-insulating and wave-transmitting material; 205. Flange; 206. High-temperature gasket; 207. Sealing and heat-insulating material; 208. Guiding inclined plane; 209. Water inlet pipe; 210. Water outlet pipe. Detailed implementation mode

[0022] In order to better understand the purpose, structure and function of the present utility model, the following further describes in detail the specific embodiments of the "high-temperature furnace wall heat-insulating window structure of a radar sensor" of the present utility model with reference to the accompanying drawings.

[0023] See Figure 1 and Figure 2 In this embodiment, this structure is applied to the furnace wall 100. A window 101 is opened on the furnace wall 100, which penetrates the inner side and the outer side of the furnace wall 100. A fixed frame 200 is fixedly arranged in the window 101; on the fixed frame 200, a radar sensor 201, a first heat-insulating and wave-transmitting material 202, a second heat-insulating and wave-transmitting material 203 and a third heat-insulating and wave-transmitting material 204 are coaxially arranged in the direction from the outer side to the inner side of the furnace wall 100; the heat-insulating performances of the first heat-insulating and wave-transmitting material 202, the second heat-insulating and wave-transmitting material 203 and the third heat-insulating and wave-transmitting material 204 increase in sequence, and the window 101 of the furnace wall 100 is sealed. The third heat-insulating and wave-transmitting material 204 is closest to the high-position area inside the furnace, and it has the best heat-insulating performance and blocks most of the heat. The outer layer of the third heat-insulating and wave-transmitting material 204 is the second heat-insulating and wave-transmitting material 203 with slightly worse heat-insulating performance, which blocks most of the heat passing through the third heat-insulating and wave-transmitting material 204. The outer layer of the second heat-insulating and wave-transmitting material 203 is the first heat-insulating and wave-transmitting material 202 with slightly worse heat-insulating performance. The first heat-insulating and wave-transmitting material 202 blocks most of the heat passing through the second heat-insulating and wave-transmitting material 203. The outside of the first heat-insulating and wave-transmitting material 202 is the radar sensor 201; through the heat-insulating effects of the three heat-insulating materials, when the nearly thousand-degree high temperature inside the furnace is transmitted to the radar sensor 201, it is only dozens of degrees; and the detection wave of the radar sensor 201 can pass through the above three heat-insulating materials, which is sufficient to clearly detect the situation inside the furnace. This heat-insulating window structure can not only meet the detection requirements of the radar sensor 201, but also arrange the radar sensor 201 outside the furnace wall 100 at the same time. The radar sensor 201 is prevented from being affected by the harsh environment inside the furnace and reducing the detection accuracy, which is convenient for maintenance and improves the service life.

[0024] It should be noted that in this embodiment, in order to control costs and meet the requirements of heat insulation performance, when heat insulation and wave transmission cannot be considered simultaneously, it is preferred that the heat insulation performance of the first heat insulation and wave transmission material 202, the second heat insulation and wave transmission material 203, and the third heat insulation and wave transmission material 204 increases, and the third heat insulation and wave transmission material 204 has the highest heat insulation performance because it is closest to the high-temperature area inside the furnace; at the same time, the wave transmission performance of the first heat insulation and wave transmission material 202, the second heat insulation and wave transmission material 203, and the third heat insulation and wave transmission material 204 decreases, and the first heat insulation and wave transmission material 202 has the strongest wave transmission performance because it is closest to the radar sensor 201; however, the third heat insulation and wave transmission material 204 with the worst wave transmission performance also needs to meet the minimum standard of being able to transmit the required wavelength.

[0025] Preferably, in this embodiment, the first heat insulation and wave transmission material 202 is preferably a high-temperature resistant PTFE plate; the second heat insulation and wave transmission material 203 is preferably an opaque, lightweight, microporous, fiber-reinforced high-temperature resistant composite plate (mainly composed of silicon carbide, bauxite, PE coating film, etc.); the third heat insulation and wave transmission material is preferably a high-performance ceramic fiber board thermal insulation material, which is mainly composed of alumina (Al2O3) and silica (SiO2), and has excellent high-temperature resistance above 1100 °C and low thermal conductivity, making it an ideal thermal insulation material suitable for high-temperature industrial furnaces, kilns, heat treatment equipment, and other applications that require efficient heat insulation.

[0026] Further refer to Figure 2 , in this embodiment, both the fixed frame 200 and the radar sensor 201 are fixedly connected with flanges 205, and the two are detachably fixedly connected through the flanges 205, so that when the radar sensor 201 fails, it is convenient to disassemble, repair, and replace.

[0027] More specifically, in this embodiment, in order to further ensure the heat insulation of the radar sensor 201, a high-temperature resistant gasket 206 is provided between the fixed frame 200 and the radar sensor 201.

[0028] Further refer to Figure 1 , in this embodiment, in order to ensure that the first heat insulation and wave transmission material 202, the second heat insulation and wave transmission material 203, and the third heat insulation and wave transmission material 204 seal the opening 101 of the furnace wall 100, a sealed heat insulation material 207 is filled between the first heat insulation and wave transmission material 202, the second heat insulation and wave transmission material 203, and the third heat insulation and wave transmission material 204 to the inner wall of the opening 101. The sealed heat insulation material 207 extends from the front end to the rear end of the opening 101 of the furnace wall 100 to ensure tightness; the heat insulation performance of the sealed heat insulation material 207 is greater than or equal to that of the third heat insulation and wave transmission material 204. Preferably, in this embodiment, the sealed heat insulation material 207 is selected as the same high-performance ceramic fiber board heat insulation material with a heat resistance above 1100 °C as the third heat insulation and wave transmission material 204.

[0029] More specifically, in this embodiment, a guiding inclined surface 208 is provided on the fixed frame 200. The guiding inclined surface 208 faces the inner side of the furnace wall 100 and extends from the third heat-insulating and wave-transmitting material 204 into the furnace wall 100 to guide the burning debris (metal oxides or dust) to slide into the furnace wall, preventing the detection accuracy from being reduced due to the burning debris blocking the detection wave of the radar sensor 201.

[0030] More specifically, in this embodiment, the radar sensor 201 is provided with a cooling water circulation device. The cooling water circulation device includes a water inlet pipe 209 and a water outlet pipe 210. A cooling water channel is arranged inside the radar sensor 201 to reduce the temperature of the radar sensor 201 and improve the accuracy of the detector 201.

[0031] See further Figure 3 , during actual use, in order to ensure obtaining the data of the center position of the strip steel to achieve the function of CPC (center line position control) centering and deviation correction, it is necessary to symmetrically arrange two such heat-insulating window structures and radar sensors 201 at opposite positions of the furnace wall 100 to respectively detect the left and right edge positions of the strip steel; or arrange multiple such heat-insulating window structures, and these structures are symmetrically distributed on the circumferential side of the furnace wall 100.

[0032] It can be understood that the present utility model is described through some embodiments. Those skilled in the art know that without departing from the spirit and scope of the present utility model, various changes or equivalent replacements can be made to these features and embodiments. In addition, under the teaching of the present utility model, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of the present utility model. Therefore, the present utility model is not limited by the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application belong to the scope protected by the present utility model.

[0033] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present utility model. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

Claims

1. A high temperature furnace wall insulation window structure of a radar sensor, characterized in that: The invention is applied to a furnace wall (100), wherein a window (101) penetrating the inner side and the outer side of the furnace wall (100) is provided on the furnace wall (100), and a fixing frame (200) is fixedly arranged in the window (101); a radar sensor (201), a first heat-insulating wave-transmitting material (202), a second heat-insulating wave-transmitting material (203) and a third heat-insulating wave-transmitting material (204) are coaxially arranged on the fixing frame (200) from the outer side to the inner side of the furnace wall (100); the heat-insulating properties of the first heat-insulating wave-transmitting material (202), the second heat-insulating wave-transmitting material (203) and the third heat-insulating wave-transmitting material (204) are increased in sequence, and the window (101) of the furnace wall (100) is sealed.

2. The high-temperature furnace wall insulation window structure of a radar sensor according to claim 1, characterized in that: The fixing frame (200) and the radar sensor (201) are both provided with flanges (205), and the two are detachably fixedly connected via the flanges (205).

3. The high temperature furnace wall insulation window structure of the radar sensor according to claim 2, characterized in that: A high temperature resistant sealing gasket (206) is provided between the fixing frame (200) and the radar sensor (201).

4. The high-temperature furnace wall insulation window structure of a radar sensor according to claim 3, characterized in that: A sealing heat-insulating material (207) is provided between the first heat-insulating wave-transmitting material (202), the second heat-insulating wave-transmitting material (203) and the third heat-insulating wave-transmitting material (204) and the inner wall of the window (101).

5. The high temperature furnace wall insulation window structure of the radar sensor according to claim 4, characterized in that: The thermal insulation performance of the sealing thermal insulation material (207) is greater than or equal to the thermal insulation performance of the third thermal insulation and wave-transmitting material (204).

6. A high temperature furnace wall insulation window structure of a radar sensor according to any one of claims 1 to 5, characterized in that: The fixed frame (200) is provided with a guiding slope (208), the guiding slope (208) faces the inner side of the furnace wall (100) and extends from the third heat-insulating and wave-transmitting material (204) to the inside of the furnace wall (100).

7. The high temperature furnace wall insulation window structure of the radar sensor according to claim 6, characterized in that: The radar sensor (201) is provided with a cooling water circulation device to reduce the temperature of the radar sensor (201).

Images