High-temperature-resistant photoelectric liquid level sensor

Abstract

The utility model relates to the technical field of liquid level sensors, in particular to a high-temperature-resistant photoelectric liquid level sensor which comprises an installation plate, a cooling device is fixedly installed on one side of the installation plate, and a heat insulation shell is fixedly installed on the side, away from the cooling device, of the installation plate. The outer surface of the sensor body is coated with the heat preservation base and the aerogel heat preservation layer on the inner side of the heat preservation base, the influence of the external temperature on the sensor body can be effectively isolated, the stability and accuracy of the sensor body are improved, the liquid level sensor body can be prevented from being frozen, and normal work of the sensor body is ensured; faults caused by low temperature are avoided, the temperature change of the sensor body can be reduced due to the stable working environment, the service life of the sensor body can be prolonged, the maintenance cost is reduced, the sensor body can work in a constant temperature environment due to the arrangement of the heat preservation base, the response speed and accuracy of the sensor body are improved, and the working efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of liquid level sensors, in particular to a high temperature resistant photoelectric liquid level sensor. Background Art

[0002] The photoelectric liquid level sensor is a sensor that uses the principles of optics and electronic technology to detect the liquid level. It uses components such as optical sensors and electronic signal processors to accurately detect and measure the liquid level. The photoelectric liquid level sensor usually consists of two parts: a transmitter and a receiver. The transmitter emits a beam of light, which is refracted or reflected when passing through the liquid and then received by the receiver. When the liquid level changes, the refraction or reflection of the light will also change. The sensor determines the liquid level by detecting the intensity or frequency change of the received light signal.

[0003] A Chinese patent with publication number "CN214748298U" discloses a high-temperature resistant photoelectric liquid level sensor, which includes a high-temperature resistant protective shell, which is sealed and installed in a sensor mounting hole on a material storage tank, a photoelectric liquid level sensor is installed on the high-temperature resistant protective shell on the inner side of the material storage tank, and a shell fixing seat is installed on the high-temperature resistant protective shell on the outer side of the material storage tank, the shell fixing seat is fixedly installed on the material storage tank, a heat dissipation fixing seat is provided on the shell fixing seat, and a sensor heat dissipation device is provided on the heat dissipation fixing seat, the high-temperature resistant protective shell includes a heat-insulating shell, a sensor controller is provided in the heat-insulating shell, a plurality of sensor probe fixing seats are provided on the heat-insulating shell, and a photoelectric liquid level sensor probe is provided on the sensor probe fixing seat. The utility model can make the photoelectric liquid level sensor suitable for high-temperature environment, and can actively control the sensor data processing working temperature to improve the working life of the sensor.

[0004] During use, the above-mentioned device adopts air cooling for heat dissipation. Although it can play a certain role in heat dissipation, its air cooling efficiency is low. At the same time, in order to improve air circulation, air cooling will obviously cause a larger part of the sensor as a whole to be exposed after installation. The contact area between the sensor and the outside becomes larger, which will obviously cause the external temperature to further act on the sensor. It can be seen that its overall heat resistance still needs to be improved, so it needs to be improved.

[0005] To this end, we propose a high temperature resistant photoelectric liquid level sensor to solve the above problems. Utility Model Content

[0006] The purpose of the utility model is to provide a high temperature resistant photoelectric liquid level sensor to solve the problems mentioned in the above background technology.

[0007] To achieve the above-mentioned purpose, the utility model provides a high-temperature resistant photoelectric liquid level sensor, comprising a mounting plate, a cooling device is fixedly mounted on one side of the mounting plate, a heat insulating shell is fixedly mounted on the side of the mounting plate away from the cooling device, a mounting device is fixedly mounted on the outside of the heat insulating shell, a sensor body is plugged into the inside of the mounting device, a cooling end of the cooling device passes through the heat insulating shell and is arranged on the inner side of the mounting device, the inner side of the cooling end of the cooling device and the outer surface of the sensor body are fitted and connected, a cleaning device is fixedly mounted on the outside of the mounting device, and the cleaning end of the cleaning device is arranged on the outer surface of the sensor body at the probe;

[0008] The cooling device includes a cooling box and a circulation pump. The cooling box is fixedly installed on a side of the mounting plate away from the mounting device. The circulation pump is fixedly installed on the lower end of one side of the interior of the heat-insulating shell. The input end of the heat-insulating shell is connected to the interior of the cooling box. A cooling coil is fixedly installed on the output end of the circulation pump. The cooling coil is arranged on the outside of the sensor body inside the mounting device. By arranging the cooling device, the device can be started during use. The circulation pump can be started to circulate the coolant inside the cooling box and the cooling coil, so that the device has better heat dissipation performance. At the same time, the whole device can be sealed for heat dissipation, and the interior of the cooling box can be cooled quickly and efficiently.

[0009] Furthermore, the installation device includes an insulation seat, a slot is opened on the inner side of the insulation seat, the cooling coil is arranged inside the slot, the sensor body is inserted into the inner side of the slot, the outer side of the sensor body and the cooling coil are tightly connected, and a threaded interface is fixedly installed on the top of the insulation seat, and the outer side of the threaded interface is threadedly connected to a limiting cover. The installation device is provided to improve the convenience of installing the liquid level sensor body during use, while improving its overall heat resistance.

[0010] Furthermore, mounting columns are fixedly installed at the four corners of the side of the mounting plate away from the cooling box, and a fixing plate is fixedly installed at the outer end of the mounting column. The mounting column and the fixing plate at the front end thereof are provided, and the mounting column can be cooperated with the fixing plate to assist in the installation of the device.

[0011] Furthermore, a semiconductor refrigerator is fixedly installed on the outside of the cooling box, and the cooling end of the semiconductor refrigerator is connected to the interior of the cooling box. The semiconductor refrigerator can be used to cool the interior of the cooling box during use, thereby improving its cooling and heat dissipation effect.

[0012] Furthermore, a mounting hole is provided in the middle of the fixing plate, and the mounting hole is arranged as a countersunk hole. By setting the mounting hole, the device can be quickly installed by cooperating with bolts through the mounting hole. Since the cooling box is arranged on the side of the mounting plate away from the insulation seat, it can be arranged on the outside of the required water liquid level detection equipment during installation, which can avoid the influence of high temperature on the cooling box.

[0013] Furthermore, the interior of the slot is provided with limit grooves arranged in a circular shape at equal intervals, the inner sides of the limit grooves are slidably connected with sliding rods, the inner sides of the sliding rods are fixedly connected to the outer sides of the sensor body, and the limit grooves are provided so that during use, the limit grooves and the sliding rods inside thereof can limit each other, thereby enabling the sensor body to be stably installed inside the slot, thereby facilitating the installation and use of the sensor body of the device.

[0014] Furthermore, an aerogel-filled insulation layer is provided inside the insulation seat, and the insulation shell is configured as a polyimide insulation shell. By providing the aerogel insulation layer, the aerogel insulation layer can be used to assist in improving its heat resistance and heat insulation performance during use. The polyimide insulation shell can further improve its heat resistance.

[0015] Furthermore, the cleaning device includes a side rail, which is fixedly installed on one side of the heat preservation seat, and a driving motor is fixedly installed on the top of the side rail. The output end of the driving motor passes through the side rail and is fixedly installed with a screw rod, which is rotatably connected to the inside of the side rail, and a slider is threadedly connected to the outer surface of the screw rod. A cleaning assembly is fixedly installed on the inner side of the slider near the heat preservation seat. The cleaning device can efficiently clean the probe of the sensor body during use, thereby improving the overall detection accuracy of the sensor.

[0016] Furthermore, the cleaning assembly includes a side rod, which is fixedly installed on a side of the slider close to the heat preservation seat, a cleaning ring is fixedly installed on the bottom of the side rod, and cleaning bristles are fixedly installed on the inner side of the cleaning ring at equal intervals, and the cleaning ring is sleeved on the outer surface of the probe of the sensor body, and the inner side of the cleaning bristles is fitly connected to the probe on the outer surface of the sensor body. By setting a driving motor to drive the slider to slide up and down, the slider is used to drive the cleaning assembly to brush and clean the detection probe, which can improve the overall cleaning function of the device and facilitate the use of the device.

[0017] Compared with the prior art, the beneficial effects of the utility model are:

[0018] First, in the utility model, the device adopts an insulation seat and an aerogel insulation layer inside the device to cover the outer surface of the sensor body, which can effectively isolate the influence of the external temperature on the sensor body, improve the stability and accuracy of the sensor body, and prevent the liquid level sensor body from being affected by freezing, ensuring the normal operation of the sensor body and avoiding failures caused by low temperature. The stable working environment can reduce the temperature change of the sensor body, help to extend the service life of the sensor body, and reduce maintenance costs. The setting of the insulation seat can enable the sensor body to work in a constant temperature environment, improve the response speed and accuracy of the sensor body, and improve work efficiency.

[0019] Secondly, in the utility model, a water-cooled design is utilized, and compared with the air-cooled design of the prior art, the overall cooling and heat dissipation performance is more efficient, which can improve the stability and reliability of the sensor. At the same time, water cooling has lower noise and strong applicability. The water-cooled heat dissipation device consumes less energy during the heat dissipation process, saves energy, and meets the requirements of energy conservation and environmental protection. Water cooling can keep the temperature around the sensor stable, reduce the impact of temperature fluctuations on sensor performance, and improve the stability and accuracy of the sensor. The water-cooled heat dissipation device is suitable for various environmental conditions, especially for heat dissipation needs in high temperature environments or closed environments, and has stronger overall heat dissipation performance.

[0020] Thirdly, in the utility model, the device adopts a cleaning device to clean the detection probe at the bottom of the sensor body, thereby avoiding the influence of dirt or impurities on the measurement result of the sensor body, reducing the interference of external factors on the sensor body, and improving the stability, detection accuracy and reliability of the sensor body. Regularly cleaning the probe can reduce the accumulation or corrosion on the probe surface, extend the service life of the sensor body, and reduce maintenance costs. Cleaning the probe can maintain the sensitivity and response speed of the sensor body, ensure that the sensor body can respond to liquid level changes quickly and accurately, and improve work efficiency. Keeping the probe clean can avoid bacteria or contaminants from adhering to the probe surface, improve the applicability of the sensor body in places with high hygiene requirements, and ensure the safety of the production process. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the structure of one side of the utility model;

[0022] Figure 2 It is a schematic diagram of the structure of the other side in the utility model;

[0023] Figure 3 This is a schematic diagram of the structure of one side of the cooling device in the utility model;

[0024] Figure 4 This is a schematic diagram of the structure of the other side of the cooling device in the utility model;

[0025] Figure 5It is a structural schematic diagram of the installation device and the cleaning device in the utility model;

[0026] Figure 6 This is a schematic diagram of the structure of the installation device in the utility model in the expanded state;

[0027] Figure 7 It is a structural schematic diagram of the cleaning component in the utility model;

[0028] Figure 8 It is a schematic structural diagram of the cooling coil, temperature sensor and heat preservation seat in the utility model in the unfolded state.

[0029] In the figure: 1. mounting plate; 2. cooling device; 21. cooling box; 22. circulating pump; 23. cooling coil; 24. semiconductor refrigerator; 3. thermal insulation shell; 4. sensor body; 5. mounting device; 51. insulation seat; 52. slot; 53. threaded interface; 54. limit cover; 55. limit groove; 56. slide rod; 6. cleaning device; 61. side rail; 62. drive motor; 63. screw rod; 64. slide block; 65. cleaning assembly; 651. side rod; 652. cleaning ring; 653. cleaning brush; 7. mounting column; 8. fixing plate; 9. mounting hole. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0031] See also Figure 1-Figure 8 In an embodiment of the utility model, a high temperature resistant photoelectric liquid level sensor comprises a mounting plate 1, a cooling device 2 is fixedly mounted on one side of the mounting plate 1, a heat insulating shell 3 is fixedly mounted on the side of the mounting plate 1 away from the cooling device 2, a mounting device 5 is fixedly mounted on the outside of the heat insulating shell 3, a sensor body 4 is plugged into the inside of the mounting device 5, a cooling end of the cooling device 2 passes through the heat insulating shell and is arranged on the inner side of the mounting device 5, the inner side of the cooling end of the cooling device 2 is fitted and connected with the outer surface of the sensor body 4, a cleaning device 6 is fixedly mounted on the outside of the mounting device 5, and the cleaning end of the cleaning device 6 is arranged on the outer surface of the probe of the sensor body 4;

[0032] The cooling device 2 includes a cooling box 21 and a circulating pump 22. The cooling box 21 is fixedly mounted on a side of the mounting plate 1 away from the mounting device 5. The circulating pump 22 is fixedly mounted on a lower end of one side of the interior of the heat-insulating shell 3. The input end of the heat-insulating shell 3 is connected to the interior of the cooling box 21. A cooling coil 23 is fixedly mounted on the output end of the circulating pump 22. The cooling coil 23 is arranged on the outside of the sensor body 4 inside the mounting device 5. By setting up the cooling device 2, the device can be operated by starting the circulating pump 22 during use. The coolant can circulate inside the cooling box 21 and the cooling coil 23, which can make it have better heat dissipation performance. At the same time, the overall heat dissipation can be sealed, and the interior of the cooling box 21 can be cooled and cooled quickly and efficiently.

[0033] See also Figure 1-Figure 6 The installation device 5 includes a heat preservation seat 51, a slot 52 is opened on the inner side of the heat preservation seat 51, the cooling coil 23 is arranged inside the slot 52, the sensor body 4 is inserted into the inner side of the slot 52, the outer side of the sensor body 4 and the cooling coil 23 are closely connected, and a threaded interface 53 is fixedly installed on the top of the heat preservation seat 51, and the outer side of the threaded interface 53 is threadedly connected with a limiting cover 54. The installation device 5 is set, and during use, the heat preservation seat 51 can cover the outer side of the sensor body 4, so that it can have a strong heat preservation function, avoid heat transfer, and improve its overall high temperature resistance. The threaded limit cover 54 and the top threaded connection of the threaded structure are set, which can improve the convenience of installing the liquid level sensor body 4 and improve its overall heat resistance.

[0034] See also Figure 4 , mounting columns 7 are fixedly installed at the four corners of the side of the mounting plate 1 away from the cooling box 21, and a fixing plate 8 is fixedly installed on the outer end of the mounting column 7. A mounting hole 9 is opened in the middle of the fixing plate 8, and the mounting hole 9 is set as a countersunk hole. The mounting column 7 and the fixing plate 8 at the front end thereof can be assisted in installing the device by cooperating with the mounting column 7 and the fixing plate 8. The mounting hole 9 is set, and the mounting hole 9 can be used to cooperate with the bolt to assist in the quick installation of the device. Since the cooling box 21 is arranged on the side of the mounting plate 1 away from the insulation seat 51, it can be arranged on the outside of the required water liquid level detection equipment during installation, which can avoid the influence of high temperature on the cooling box 21. At the same time, the mounting hole 9 is a countersunk hole, which can accommodate the end of the bolt, which can improve its installation beauty and convenience.

[0035] See also Figure 1-Figure 4 A semiconductor refrigerator 24 is fixedly installed on the outside of the cooling box 21. The cooling end of the semiconductor refrigerator 24 is connected to the interior of the cooling box 21. The semiconductor refrigerator 24 can be used to cool the interior of the cooling box 21 during use, thereby improving its cooling and heat dissipation effect. At the same time, it can also prevent heat from heating the coolant inside the cooling box 21, thereby maintaining the cooling performance of the coolant for a long time.

[0036] See also Figure 1-Figure 6 The interior of the insulation seat 51 is provided with an aerogel-filled insulation layer, and the insulation shell is configured as a polyimide insulation shell. By configuring the aerogel insulation layer, the aerogel has a strong thermal insulation performance. During use, the aerogel insulation layer can be used to assist in improving its heat resistance and heat insulation performance. A polyimide insulation shell is configured. Polyimide has strong heat resistance and corrosion resistance, which can further improve its overall heat resistance and service life.

[0037] See also Figure 5-Figure 6 The cleaning device 6 includes a side rail 61, which is fixedly installed on one side of the heat preservation seat 51. A driving motor 62 is fixedly installed on the top of the side rail 61. The output end of the driving motor 62 passes through the side rail 61 and is fixedly installed with a screw rod 63. The screw rod 63 is rotatably connected to the inside of the side rail 61. The outer surface of the screw rod 63 is threadedly connected with a slider 64. A cleaning component 65 is fixedly installed on the inner side of the slider 64 near the heat preservation seat 51. The cleaning device 6 is set. During use, the driving motor 62 can be started to run, and the driving motor 62 can be used to drive the screw rod 63 to rotate. The rotation of the screw rod 63 can drive the slider 64 to slide on the inner side of the side rail 61. The slider 64 can be moved up and down to push the cleaning component 65 to move up and down. By moving the cleaning component 65 up and down, the probe of the sensor body 4 can be efficiently cleaned, which can improve the overall detection accuracy of the sensor.

[0038] See also Figure 6 The interior of the slot 52 is provided with limiting grooves 55 arranged in a circular shape at equal intervals, and the inner sides of the limiting grooves 55 are slidably connected with slide bars 56, and the inner sides of the slide bars 56 are fixedly connected to the outer sides of the sensor body 4. The limiting grooves 55 can be provided, and the limiting grooves 55 and the slide bars 56 inside thereof can limit each other, so that the sensor body 4 can be stably installed in the interior of the slot 52, and the overall stability of the sensor body 4 can be improved, so that the overall stability of the device is relatively strong, and the overall detection accuracy of the sensor body 4 is relatively high.

[0039] See also Figure 5-Figure 6 The cleaning assembly 65 includes a side rod 651, which is fixedly installed on a side of the slider 64 close to the heat preservation seat 51. A cleaning ring 652 is fixedly installed at the bottom of the side rod 651, and cleaning bristles 653 are fixedly installed on the inner side of the cleaning ring 652 at equal intervals. The cleaning ring 652 is sleeved on the outer surface of the probe of the sensor body 4, and the inner side of the cleaning bristles 653 is fitted and connected with the probe on the outer surface of the sensor body 4. By setting the cleaning assembly 65, the cleaning ring 652 on the side rod 651 can be driven to move up and down by adjusting the slider 64 during use. The cleaning ring 652 can be driven to move up and down to drive the cleaning bristles 653 to brush and clean the detection probe of the sensor body 4, thereby improving the overall cleaning function of the device and facilitating the use of the device.

[0040] The working principle of the utility model is as follows: during use of the device, the sensor body 4 can be plugged into the inside of the slot 52, at which time the slide bar 56 is plugged into the inside of the limiting groove 55, and the sensor body 4 can be installed in the inside of the thermal insulation seat 51 by limiting the slide bar 56 and the limiting groove 55. At this time, the thermal insulation seat 51 is used to cover the outer surface of the sensor body 4, and the aerogel filling layer can assist in thermal insulation, which can play a good role in thermal insulation for the sensor, so that the external heat cannot be transmitted to the sensor body 4, and the heat resistance of the sensor body 4 can be improved. At the same time, a sliding plug-in installation is adopted, and the top of the threaded interface 53 can be limited by threaded connection of the limiting cover 54, so that the top of the sensor body 4 can be limited, which is convenient and fast. Install the sensor body 4. When the sensor body 4 needs to be disassembled, it is only necessary to loosen the limit cover 54 on the top of the threaded interface 53 to remove the limit cover 54 from the top of the threaded interface 53. At this time, the sensor body 4 can be taken out from the inside of the slot 52, so that the device as a whole is convenient for quick disassembly and assembly of the sensor body 4, and its heat resistance can also be improved. Aerogel is an excellent thermal insulation material with extremely low thermal conductivity. It can effectively isolate the influence of external temperature on the sensor body 4, improve the stability and accuracy of the sensor body 4, and at the same time, the aerogel insulation seat 51 can prevent the liquid level sensor body 4 from being affected by freezing, ensure the normal operation of the sensor body 4, and avoid failures caused by low temperature. It can reduce the energy consumption of the sensor body 4 and improve High energy utilization efficiency meets the requirements of energy conservation and environmental protection. A stable working environment can reduce the temperature change of the sensor body 4, which helps to extend the service life of the sensor body 4 and reduce maintenance costs. The setting of the heat preservation seat 51 can make the sensor body 4 work in a constant temperature environment, improve the response speed and accuracy of the sensor body 4, and improve work efficiency. By setting the cooling device 2, the device can be operated by starting the circulation pump 22 during use. When the circulation pump 22 is used, the cooling liquid inside the cooling box 21 can be pumped by the circulation pump 22, and the cooling liquid circulates inside the cooling coil 23. At this time, the cooling coil 23 is attached to the outer surface of the sensor body 4, and the cooling liquid flows inside the circulation pump 22, which can assist in water cooling. The outer surface of the sensor body 4 is cooled by a water-cooling design. Compared with the air-cooling design of the prior art, the overall cooling and heat dissipation performance is more efficient. Compared with air-cooling, water-cooling has higher heat dissipation efficiency and can conduct the heat generated by the sensor to the water more quickly, effectively reducing the operating temperature of the sensor and improving the stability and reliability of the sensor. At the same time, the water-cooling device does not require a fan, so it has a lower noise level than air-cooling, and is suitable for environments with high noise requirements. The water-cooling device consumes less energy during the heat dissipation process, saves energy, and meets the requirements of energy conservation and environmental protection. Water-cooling can keep the temperature around the sensor stable, reduce the impact of temperature fluctuations on sensor performance, and improve the stability and accuracy of the sensor.The water-cooled heat dissipation device is suitable for various environmental conditions, especially for heat dissipation needs in high-temperature environments or closed environments, and has stronger overall heat dissipation performance. The cleaning device 6 is set so that during use, the device can be operated by starting the drive motor 62, and the drive motor 62 is used to drive the screw rod 63 to rotate. The rotation of the screw rod 63 can drive the slider 64 to slide up and down on the inner side of the side rail 61. The slider 64 slides up and down to assist in pushing the side rod 651 up and down. The up and down movement of the side rod 651 can push the cleaning ring 652 to move at the probe of the sensor body 4. At this time, the cleaning ring 652 drives the cleaning brush 653 to brush and clean the probe of the sensor body 4, which can have a good cleaning function and can keep the probe clean. To ensure the accuracy of the readings of the sensor body 4, avoid the influence of dirt or impurities on the measurement results of the sensor body 4, maintain the stable working state of the sensor body 4, reduce the interference of external factors on the sensor body 4, improve the stability and reliability of the sensor body 4, and regularly clean the probe to reduce the scale or corrosion on the probe surface, extend the service life of the sensor body 4, and reduce maintenance costs. Cleaning the probe can maintain the sensitivity and response speed of the sensor body 4, ensure that the sensor body 4 can respond to liquid level changes quickly and accurately, and improve work efficiency. Keeping the probe clean can avoid bacteria or contaminants from adhering to the probe surface, improve the applicability of the sensor body 4 in places with high hygiene requirements, and ensure the safety of the production process.

[0041] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0042] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A high temperature resistant photoelectric liquid level sensor, characterized in that: It comprises a mounting plate, a cooling device is fixedly mounted on one side of the mounting plate, a heat insulating shell is fixedly mounted on the side of the mounting plate away from the cooling device, a mounting device is fixedly mounted on the outside of the heat insulating shell, a sensor body is plugged into the inside of the mounting device, a cooling end of the cooling device passes through the heat insulating shell and is arranged on the inside of the mounting device, the inner side of the cooling end of the cooling device is fitted and connected with the outer surface of the sensor body, a cleaning device is fixedly mounted on the outside of the mounting device, and the cleaning end of the cleaning device is arranged on the outer surface of the probe of the sensor body; The cooling device includes a cooling box and a circulating pump. The cooling box is fixedly installed on a side of the mounting plate away from the mounting device. The circulating pump is fixedly installed on a lower end of one side inside the insulation shell. The input end of the insulation shell is connected to the interior of the cooling box. A cooling coil is fixedly installed on the output end of the circulating pump. The cooling coil is arranged on the outside of the sensor body inside the mounting device.

2. A high temperature resistant photoelectric liquid level sensor according to claim 1, characterized in that: The installation device includes a heat preservation seat, a slot is opened on the inner side of the heat preservation seat, the cooling coil is arranged inside the slot, the sensor body is inserted into the inner side of the slot, the outer side of the sensor body and the cooling coil are tightly connected, and a threaded interface is fixedly installed on the top of the heat preservation seat, and the outer side of the threaded interface is threadedly connected to a limit cover.

3. A high temperature resistant photoelectric liquid level sensor according to claim 1, characterized in that: A semiconductor refrigerator is fixedly installed on the outer side of the cooling box, and a cooling end of the semiconductor refrigerator is connected to the interior of the cooling box.

4. The high temperature resistant photoelectric liquid level sensor according to claim 1, characterized in that: Mounting columns are fixedly mounted at four corners of one side of the mounting plate away from the cooling box, and a fixing plate is fixedly mounted at the outer end of the mounting column.

5. A high temperature resistant photoelectric liquid level sensor according to claim 4, characterized in that: A mounting hole is provided in the middle of the fixing plate, and the mounting hole is configured as a countersunk hole.

6. A high temperature resistant photoelectric liquid level sensor according to claim 2, characterized in that: An aerogel-filled insulation layer is arranged inside the insulation seat, and the heat-insulating shell is arranged as a polyimide insulation shell.

7. A high temperature resistant photoelectric liquid level sensor according to claim 6, characterized in that: The interior of the slot is provided with limiting grooves arranged in a circular ring shape at equal intervals, the inner sides of the limiting grooves are slidably connected with sliding rods, and the inner sides of the sliding rods are fixedly connected to the outer sides of the sensor body.

8. The high temperature resistant photoelectric liquid level sensor according to claim 2, characterized in that: The cleaning device includes a side rail, which is fixedly installed on one side of the heat preservation seat. A driving motor is fixedly installed on the top of the side rail. A screw rod is fixedly installed on the output end of the driving motor through the side rail. The screw rod is rotatably connected to the inside of the side rail. A slider is threadedly connected to the outer surface of the screw rod. A cleaning component is fixedly installed on the inner side of the slider close to the heat preservation seat.

9. A high temperature resistant photoelectric liquid level sensor according to claim 8, characterized in that: The cleaning assembly includes a side rod, which is fixedly installed on a side of the slider close to the insulation seat. A cleaning ring is fixedly installed on the bottom of the side rod, and cleaning bristles are fixedly installed at equal intervals on the inner side of the cleaning ring. The cleaning ring is sleeved on the outer surface of the sensor body probe, and the inner side of the cleaning bristles is fitly connected to the probe on the outer surface of the sensor body.

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