Dry quenching furnace material level early warning device

Abstract

The utility model discloses a material level early warning device for a dry quenching furnace. The material level early warning device comprises a shell, the radar level gage is used for detecting the material level in the dry quenching furnace; the isolation assembly comprises an upper isolation sleeve and a lower isolation plate which are arranged below the radar level gage, and an isolation air chamber is formed between the upper isolation sleeve and the lower isolation plate in a sealed mode; the cooling and purging assembly comprises a purging air channel which is annularly arranged below the lower isolation plate and is used for blowing nitrogen to the bottom surface of the lower isolation plate; the water cooling assembly is used for cooling the interior of the shell; the sweeping and dust removing assembly is arranged below the lower isolation plate, can move back and forth in the mode of being attached to the bottom face of the lower isolation plate and is used for sweeping dust on the bottom face of the lower isolation plate. The radar level gauge can be cooled and protected, the radar level gauge is prevented from being damaged by high temperature, sweeping and dust removal can be carried out, and normal detection of the radar level gauge is prevented from being affected by dust.

Description

Technical Field

[0001] This utility model relates to the field of dry quenching coke oven material level detection technology, and in particular to a dry quenching coke oven material level early warning device. Background Technology

[0002] In dry quenching coking, high-temperature red-hot coke (1000℃) after dry distillation in a coke oven needs to be charged into a dry quenching oven for quenching. The high-temperature red-hot coke is then cooled by circulating nitrogen gas within the sealed dry quenching oven. The high-temperature red-hot coke is charged from the top of the dry quenching oven, and the nitrogen-cooled coke is continuously discharged from the bottom. During the charging of the high-temperature red-hot coke, the coke level inside the oven rises rapidly; as the cooled coke is continuously discharged, the coke level gradually decreases. The coke level inside the oven is crucial for the production control and safe operation of the dry quenching oven, making accurate monitoring of the coke level essential. Because the dry quenching oven operates in a sealed, high-temperature state, special devices must be used to detect the coke level.

[0003] In the early days, the level of red coke in dry quenching coke ovens was detected using a cobalt-60 radioisotope level gauge. However, the radioisotope level gauge could only detect the level at two points, high and low, resulting in low detection accuracy. Furthermore, the ionizing radiation generated by the radioisotope polluted the environment and could easily affect the health of on-site operators.

[0004] With the development of technology, the use of environmentally friendly microwave detection technology to detect the level of red coke in dry quenching coke ovens has become a new trend. Microwave detection technology can continuously detect the level of red coke in dry quenching coke ovens. Existing detection devices are often installed on one side of the dry quenching coke oven to detect the level of material inside. However, the high-temperature environment inside the dry quenching coke oven can easily damage the microwave detection devices, and the dust generated inside the dry quenching coke oven can easily adhere to the microwave detection devices, affecting the normal detection of the microwave detection devices. Utility Model Content

[0005] In view of the above-mentioned defects or deficiencies in the prior art, it is desirable to provide a dry quenching coke oven level early warning device that can cool down and protect the radar level gauge to avoid damage to the radar level gauge due to high temperature, and can also clean and remove dust to prevent dust from affecting the normal detection of the radar level gauge.

[0006] This utility model provides a dry quenching coke oven level early warning device, comprising:

[0007] The housing is used for installation at the detection port of the dry quenching coke oven;

[0008] A radar level gauge, installed inside the housing, is used to emit electromagnetic waves toward the detection port to detect the material level inside the dry quenching coke oven.

[0009] The isolation assembly includes an upper isolation sleeve and a lower isolation plate disposed below the radar level gauge, and the upper isolation sleeve and the lower isolation plate are sealed to form an isolation air chamber;

[0010] The cooling purging assembly includes a purging air passage arranged around the lower partition plate. The top of the purging air passage has several air outlets facing the lower partition plate for blowing nitrogen gas onto the bottom surface of the lower partition plate.

[0011] A water-cooling component is disposed inside the housing and located on one side of the radar level gauge, and is used to cool the inside of the housing;

[0012] The cleaning and dust removal component is located below the lower isolation plate and can move back and forth against the bottom surface of the lower isolation plate to clean the dust on the bottom surface of the lower isolation plate.

[0013] Furthermore, both the upper isolation sleeve and the lower isolation plate are made of high-temperature resistant and wave-transparent material.

[0014] Furthermore, a temperature sensor is installed in the isolation chamber.

[0015] Furthermore, an air inlet for nitrogen gas is provided on one side of the housing, and the air inlet is connected to the purging air passage.

[0016] Furthermore, the water-cooling assembly includes an insulation sleeve fitted inside the housing and a water-cooling pipe coiled on the inner wall of the insulation sleeve. The water-cooling pipe is located between the insulation sleeve and the radar level gauge. One end of the water-cooling pipe is connected to a water inlet pipe, and the other end is connected to a return pipe. Both the water inlet pipe and the return pipe are connected to a cooling circulating water tank.

[0017] Furthermore, the cleaning and dust removal assembly includes a first threaded rod and a movable plate. One end of the first threaded rod is rotatably connected to the inner wall of the housing, and the other end extends to the outside of the housing and is connected to a first motor that drives its rotation. The movable plate is threadedly connected to the first threaded rod, and the movable plate is provided with bristles on the side near the lower isolation plate.

[0018] Furthermore, the cleaning and dust removal assembly also includes a first guide rod fixedly disposed within the housing, the first guide rod being arranged parallel to the first threaded rod, and the movable plate being slidably connected to the first guide rod.

[0019] Furthermore, it also includes a protective assembly disposed below the cooling and purging assembly. The protective assembly includes a second threaded rod and a plurality of vertically arranged split protective plates. One end of the second threaded rod is rotatably connected to the inner wall of the housing, and the other end extends to the outside of the housing and is connected to a second motor that drives its rotation. Adjacent split protective plates are slidably connected. The top of the uppermost split protective plate is threadedly connected to the second threaded rod, and one end of the lowermost split protective plate is fixedly connected to the inner wall of the housing. When the second motor is activated, the plurality of split protective plates can be driven to extend to form an integral protective plate. The edge of the integral protective plate is in contact with the inner wall of the housing.

[0020] Furthermore, symmetrical grooves are provided on the inner wall of the housing, and sliders are symmetrically arranged on both sides of the split protective plate, with the sliders slidably connected to the grooves.

[0021] Furthermore, the protective assembly also includes a second guide rod fixedly disposed within the housing. The second guide rod is disposed parallel to the second threaded rod, and the top of the uppermost split protective plate is slidably connected to the second guide rod.

[0022] Compared with the prior art, the beneficial effects of this utility model are:

[0023] (1) This utility model uses a radar level gauge to detect the level of red coke in the dry quenching coke oven. The radar level gauge can continuously detect the level of red coke in the dry quenching coke oven, thereby improving the accuracy and precision of the detection.

[0024] (2) Nitrogen gas is blown into the purging air passage of the cooling purging assembly of this utility model. Nitrogen gas liquefaction has a cooling effect. By continuously blowing nitrogen gas onto the bottom surface of the lower isolation plate, the bottom surface of the lower isolation plate can be purged to prevent dust from adhering to the bottom surface of the lower isolation plate. It can also cool the inside of the housing to prevent the radar level gauge from being damaged by the high temperature environment.

[0025] (3) The present invention is also provided with a water cooling component and a cleaning and dust removal component. The water cooling component can further cool the inside of the housing to avoid damage to the radar level gauge in a high-temperature environment. The cleaning and dust removal component can clean the dust adhering to the bottom surface of the lower isolation plate to avoid dust adhering to the bottom surface of the lower isolation plate for a long time and affecting the normal detection work of the radar level gauge.

[0026] (4) The present invention is also provided with a protective component, which can be activated when the temperature inside the shell is high, and the radar level gauge is isolated from the dry quenching coke oven again through the protective component, thereby improving the high temperature protection effect.

[0027] It should be understood that the description in this utility model description section is not intended to limit the key or essential features of the embodiments of this utility model, nor is it intended to restrict the scope of this utility model. Other features of this utility model will become readily apparent from the following description. Attached Figure Description

[0028] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0029] Figure 1 This is a schematic diagram of the present invention installed on a dry quenching coke oven;

[0030] Figure 2 This is a schematic diagram of the structure of this utility model;

[0031] Figure 3 This is a partially enlarged view of the present invention;

[0032] Figure 4 A top view of the purge airway structure;

[0033] Figure 5 A top view of the dust removal assembly;

[0034] Figure 6 This is a top view of the protective components.

[0035] Figure 7 A top view of a single split protective panel;

[0036] Figure 8 A schematic diagram of the connection structure between two separate protective panels;

[0037] The following components are labeled in the diagram: 1. Housing; 2. Radar level gauge; 3. Isolation assembly; 4. Cooling and purging assembly; 5. Water cooling assembly; 6. Cleaning and dust removal assembly; 7. Protective assembly; 8. Temperature sensor.

[0038] 31. Upper isolation sleeve; 32. Lower isolation plate;

[0039] 41. Purge the airway;

[0040] 51. Insulation jacket; 52. Water-cooled pipe; 53. Inlet pipe; 54. Return pipe; 55. Cooling circulating water tank;

[0041] 61. First threaded rod; 62. Moving plate; 63. First motor; 64. Brush bristles; 65. First guide rod;

[0042] 71. Second threaded rod; 72. Split protective plate; 73. Second motor; 74. Second guide rod;

[0043] 411. Vent;

[0044] 721. Slider;

[0045] 100. Dry quenching coke oven; 200. Install foundation support. Detailed Implementation

[0046] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the relevant invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings.

[0047] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other. The present utility model will now be described in detail with reference to the accompanying drawings and embodiments.

[0048] Please refer to Figures 1 to 8 This utility model provides a dry quenching coke oven level early warning device for detecting the level of red-hot coke material inside the dry quenching coke oven 100. Figure 1 As shown, the dry quenching coke oven 100 has a red coke feed inlet at the top, a red coke discharge outlet at the bottom, and a detection port on one side of the outer wall. A mounting base support 200 is installed at the detection port. The level warning device of this application is installed on the side wall of the dry quenching coke oven 100 through the mounting base support 200.

[0049] This application discloses a dry quenching coke oven level warning device, comprising a shell 1, a radar level gauge 2, an isolation assembly 3, a cooling and purging assembly 4, a water cooling assembly 5, and a cleaning and dust removal assembly 6, wherein...

[0050] The housing 1 includes an upper housing and a lower housing that are fixedly connected. The upper housing is cylindrical and the lower housing is rectangular. The upper housing and the lower housing are connected, and the lower housing is fixedly connected to the mounting base bracket 200 by bolts.

[0051] Radar level gauge 2, installed inside housing 1, is used to emit electromagnetic waves toward the detection port to detect the material level in the dry quenching coke oven 100. Specifically, radar level gauge 2 is a commercially available radar level gauge that can detect the material level of objects. Its working principle will not be described in detail here. The radar level gauge includes a radar electromagnetic transceiver and a radar guide antenna. The radar guide antenna emits a 26GHz electromagnetic wave signal through a very short microwave pulse with very low energy. The echo of the electromagnetic wave signal reflected back by the medium is received by the receiver. The electronic components of radar level gauge 2 analyze and calculate the interval time from the transmission to the reception of the radar pulse signal, and then calculate the distance from the radar probe to the surface of the medium, thereby estimating the material level of the red-hot coke.

[0052] The isolation component 3 includes an upper isolation sleeve 31 and a lower isolation plate 32 disposed below the radar level gauge 2. The upper isolation sleeve 31 and the lower isolation plate 32 are sealed to form an isolation air chamber. Specifically, the isolation air chamber can effectively isolate the high temperature coming from below, thus playing the role of isolating high temperature.

[0053] The cooling and purging assembly 4 includes a purging air duct 41 arranged around the lower isolation plate 32. The top of the purging air duct 41 faces the lower isolation plate 32 and has several air outlets 411 for blowing nitrogen gas onto the bottom surface of the lower isolation plate 32. Specifically, a commercially available vortex refrigeration device is used to supply nitrogen gas to the inside of the housing 1. The air outlet of the vortex refrigeration device is connected to the purging air duct 41. Nitrogen gas enters the purging air duct 41 and blows nitrogen gas onto the bottom surface of the lower isolation plate 32. The nitrogen gas liquefies and cools down the bottom surface of the lower isolation plate 32, which can effectively reduce the temperature of the bottom surface of the lower isolation plate 32 and prevent high temperature from damaging the radar level gauge 2. After the nitrogen gas touches the lower isolation plate 32, it flows downward and flows into the dry quenching coke oven 100 to cool down the high-temperature red coke. The blowing action of the nitrogen gas can also purge the lower isolation plate 32, preventing a large amount of dust inside the housing 1 from adhering to the bottom surface of the lower isolation plate 32 and thus avoiding affecting the normal transmission and reception of electromagnetic waves by the radar level gauge 2.

[0054] The water-cooling component 5 is installed inside the housing 1 and located on one side of the radar level gauge 2, and is used to cool the inside of the housing 1.

[0055] The cleaning and dust removal component 6 is located below the lower isolation plate 32 and can move back and forth against the bottom surface of the lower isolation plate 32 to clean the dust on the bottom surface of the lower isolation plate 32.

[0056] In this embodiment, the radar level gauge 2 emits electromagnetic waves toward the detection port. When the electromagnetic waves encounter the surface of the red coke, they are reflected back and received by the receiver inside the radar level gauge 2. The electronic components inside the radar level gauge 2 analyze and calculate the distance information into level information, thereby measuring the level of red coke in the dry quenching coke oven 100.

[0057] During the detection process, the isolation chamber can isolate the high temperature from the bottom to a certain extent. The cooling and blowing component 4 blows nitrogen gas to the lower isolation plate 32. The nitrogen gas continuously blows the lower isolation plate 32, which cools the inside of the housing 1 and prevents the high temperature from the bottom from damaging the radar level gauge 2. It also blows away dust and prevents dust from accumulating on the bottom surface of the lower isolation plate 32.

[0058] Furthermore, the water-cooling component 5 can further cool the inside of the housing 1, preventing damage to the radar level gauge 2 from the high-temperature environment. The cleaning and dust removal component 6 can clean the dust adhering to the bottom surface of the lower isolation plate 32, preventing the dust from adhering to the bottom surface of the lower isolation plate 32 for a long time and affecting the normal detection work of the radar level gauge 2.

[0059] In a preferred embodiment, such as Figure 2 As shown, both the upper isolation sleeve 31 and the lower isolation plate 32 are made of high-temperature resistant and wave-transparent materials. Specifically, the upper isolation sleeve 31 is preferably made of polytetrafluoroethylene or ceramic, and the lower isolation plate 32 is preferably made of high-temperature resistant and wave-transparent quartz glass. The cavity above the upper isolation sleeve 31 is completely isolated from the isolation gas chamber, effectively isolating the high temperature transmitted from below.

[0060] In a preferred embodiment, such as Figure 3 and Figure 4 As shown, the water-cooled assembly 5 includes an insulation sleeve 51 fitted inside the housing 1, and a water-cooled pipe 52 coiled on the inner wall of the insulation sleeve 51. The water-cooled pipe 52 is located between the insulation sleeve 51 and the radar level gauge 2. One end of the water-cooled pipe 52 is connected to a water inlet pipe 53, and the other end is connected to a return pipe 54. Both the water inlet pipe 53 and the return pipe 54 are connected to the cooling circulating water tank 55.

[0061] In this embodiment, a spiral groove is formed on the inner wall of the insulation sleeve 51, and the water-cooling pipe 52 is embedded and fixed in the groove. Cooling water in the cooling circulating water tank 55 flows into the water-cooling pipe 52 through the inlet pipe 53. During the process of the cooling water flowing in the water-cooling pipe 52, the interior of the shell 1 is cooled by heat exchange. The cooling water flows back to the cooling circulating water tank 55 through the return pipe 54 for cooling. The continuous cooling of the interior of the shell 1 by the circulation of cooling water further improves the cooling effect of the device and avoids damage to the radar level gauge 2 by high temperature environment. The insulation sleeve 51 can better keep the interior of the shell 1 at a lower temperature and prevent the temperature of the water-cooling pipe 52 from spreading to the outside of the shell 1.

[0062] In a preferred embodiment, such as Figure 3 and Figure 5 As shown, the cleaning and dust removal assembly 6 includes a first threaded rod 61 and a movable plate 62. One end of the first threaded rod 61 is rotatably connected to the inner wall of the housing 1, and the other end extends to the outside of the housing 1 and is connected to a first motor 63 that drives it to rotate. The movable plate 62 is threadedly connected to the first threaded rod 61, and brush bristles 64 are provided on the side of the movable plate 62 near the lower isolation plate 32.

[0063] In this embodiment, when dust adheres to the bottom of the lower isolation plate 32 and affects the detection effect, the first motor 63 can be started. The first motor 63 drives the first threaded rod 61 to rotate. The rotation of the first threaded rod 61 can drive the moving plate 62 to move along the length direction of the first threaded rod 61. By changing the rotation direction of the first motor 63, the rotation direction of the first threaded rod 61 can be changed, so that the moving plate 62 can move back and forth along the length direction of the first threaded rod 61. Then, the brush bristles 64 can be used to remove the dust attached to the bottom of the lower isolation plate 32 and restore the normal detection of the radar level gauge 2.

[0064] It should be noted that the entire cleaning and dust removal component 6 is made of high-temperature resistant materials. A high-temperature resistant protective shell can be installed on the outside of the first motor 63, and the first motor 63 can be placed inside the protective shell to avoid damage to it due to high temperature.

[0065] In a preferred embodiment, such as Figure 3 and Figure 5 As shown, the cleaning and dust removal assembly 61 also includes a first guide rod 65 fixedly disposed inside the housing 1. The first guide rod 65 is disposed parallel to the first threaded rod 61, and the movable plate 62 is slidably connected to the first guide rod 65.

[0066] In this embodiment, the first guide rod 65 serves to limit and guide, preventing the movable plate 62 from rotating with the rotation of the first threaded rod 61, and also improving the stability of the movable plate 62 during movement.

[0067] In a preferred embodiment, such as Figure 3 and Figure 6 As shown, it also includes a protective component 7 disposed below the cooling purging assembly 4. The protective component 7 includes a second threaded rod 71 and a plurality of split protective plates 72 disposed vertically. One end of the second threaded rod 71 is rotatably connected to the inner wall of the housing 1, and the other end extends to the outside of the housing 1 and is connected to a second motor 73 that drives it to rotate. Two adjacent split protective plates 72 are slidably connected. The top of the split protective plate 72 located at the top layer is threadedly connected to the second threaded rod 71, and one end of the split protective plate 72 located at the bottom layer is fixedly connected to the inner wall of the housing 1. When the second motor 73 is started, it can drive the plurality of split protective plates 72 to extend to form an integral protective plate. The edge of the integral protective plate is in contact with the inner wall of the housing 1.

[0068] Preferred, such as Figure 2 and Figure 3 As shown, a temperature sensor 8 is installed in the isolation chamber.

[0069] In this embodiment, the split protective plate 72 is made of high temperature resistant material, and the two symmetrical sides of the split protective plate 72 are both attached to the inner wall of the shell 1.

[0070] When the temperature sensor 8 detects that the temperature inside the isolation chamber is high, the second motor 73 starts and drives the second threaded rod 71 to rotate. The rotation of the second threaded rod 71 can drive the uppermost split protective plate 72 to move, thereby causing multiple split protective plates 72 to slide relative to each other until the uppermost split protective plate 72 contacts the inner wall of the shell 1. Multiple split protective plates are spliced ​​together to form an overall protective plate, preventing the high temperature below from rising and playing a protective role.

[0071] It should be noted that the second motor 73 can also be installed in a high-temperature resistant protective housing to prevent high temperature damage to the second motor 73.

[0072] This application also includes a control device, in which the first motor 63, the second motor 73 and the temperature sensor 8 are all electrically connected, and the control device is used to control the operation of the cleaning and dust removal component 6 and the protective component 7.

[0073] In a preferred embodiment, such as Figure 3 , Figure 6 , Figure 7 and Figure 8 As shown, symmetrical grooves are formed on the inner wall of the housing 1, and sliders 721 are symmetrically arranged on both sides of the split protective plate 72. The sliders 721 are slidably connected to the grooves. Specifically, this improves the stability of the split protective plate 72 during the sliding process.

[0074] In a preferred embodiment, such as Figure 6 As shown, the protective assembly 7 also includes a second guide rod 74 fixedly disposed inside the housing 1. The second guide rod 74 is disposed parallel to the second threaded rod 71, and the top of the uppermost split protective plate 72 is slidably connected to the second guide rod 74.

[0075] In this embodiment, the second guide rod 74 serves as a guide, improving the stability of the split protective plate 72 during movement.

[0076] In the description of this specification, the terms "connection," "installation," and "fixing," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0077] In the description of this specification, the terms "one embodiment," "some embodiments," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0078] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A level early warning device for a dry quenching coke oven, characterized in that, include: The housing is used for installation at the detection port of the dry quenching coke oven; A radar level gauge, installed inside the housing, is used to emit electromagnetic waves toward the detection port to detect the material level inside the dry quenching coke oven. The isolation assembly includes an upper isolation sleeve and a lower isolation plate disposed below the radar level gauge, and the upper isolation sleeve and the lower isolation plate are sealed to form an isolation air chamber; The cooling purging assembly includes a purging air passage arranged around the lower partition plate. The top of the purging air passage has several air outlets facing the lower partition plate for blowing nitrogen gas onto the bottom surface of the lower partition plate. A water-cooling component is disposed inside the housing and located on one side of the radar level gauge, and is used to cool the inside of the housing; The cleaning and dust removal component is located below the lower isolation plate and can move back and forth against the bottom surface of the lower isolation plate to clean the dust on the bottom surface of the lower isolation plate.

2. The dry quenching coke oven level early warning device according to claim 1, characterized in that, Both the upper isolation sleeve and the lower isolation plate are made of high-temperature resistant and wave-transparent material.

3. The dry quenching coke oven level early warning device according to claim 1, characterized in that, A temperature sensor is installed in the isolation chamber.

4. The dry quenching coke oven level early warning device according to claim 1, characterized in that, The housing has an air inlet for nitrogen gas to enter on one side, and the air inlet is connected to the purging air passage.

5. The dry quenching coke oven level early warning device according to claim 1, characterized in that, The water-cooling assembly includes an insulation sleeve fitted inside the housing and a water-cooling pipe coiled on the inner wall of the insulation sleeve. The water-cooling pipe is located between the insulation sleeve and the radar level gauge. One end of the water-cooling pipe is connected to a water inlet pipe, and the other end is connected to a return pipe. Both the water inlet pipe and the return pipe are connected to a cooling circulating water tank.

6. The dry quenching coke oven level early warning device according to claim 1, characterized in that, The cleaning and dust removal assembly includes a first threaded rod and a movable plate. One end of the first threaded rod is rotatably connected to the inner wall of the housing, and the other end extends to the outside of the housing and is connected to a first motor that drives its rotation. The movable plate is threadedly connected to the first threaded rod, and the movable plate is provided with bristles on the side near the lower isolation plate.

7. The dry quenching coke oven level early warning device according to claim 6, characterized in that, The cleaning and dust removal assembly also includes a first guide rod fixedly disposed within the housing. The first guide rod is arranged parallel to the first threaded rod, and the movable plate is slidably connected to the first guide rod.

8. The dry quenching coke oven level early warning device according to claim 1, characterized in that, It also includes a protective assembly disposed below the cooling and purging assembly. The protective assembly includes a second threaded rod and a plurality of split protective plates disposed vertically. One end of the second threaded rod is rotatably connected to the inner wall of the housing, and the other end extends to the outside of the housing and is connected to a second motor that drives its rotation. Adjacent split protective plates are slidably connected. The top of the uppermost split protective plate is threadedly connected to the second threaded rod, and one end of the lowermost split protective plate is fixedly connected to the inner wall of the housing. When the second motor is started, the plurality of split protective plates can be driven to extend to form an integral protective plate. The edge of the integral protective plate is in contact with the inner wall of the housing.

9. The dry quenching coke oven level early warning device according to claim 8, characterized in that, The inner wall of the housing is symmetrically provided with sliding grooves, and the two sides of the split protective plate are symmetrically provided with sliders, which are slidably connected to the sliding grooves.

10. The dry quenching coke oven level early warning device according to claim 8, characterized in that, The protective assembly further includes a second guide rod fixedly disposed within the housing. The second guide rod is arranged parallel to the second threaded rod, and the top of the uppermost split protective plate is slidably connected to the second guide rod.

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