Explosion-proof high-temperature-resistant Internet of Things sensor

Abstract

The utility model relates to an explosion-proof high temperature resistant Internet of Things sensor, which relates to the field of Internet of Things sensors, and comprises a sensor assembly, a protective shell, a barrier-free connecting pipe, an external cold source, explosion venting joint seats, explosion venting joints and an explosion venting membrane assembly, an explosion venting connector is arranged at one end of each barrier-free connecting pipe, the barrier-free connecting pipes are connected with the protective shell by connecting the explosion venting connectors to the explosion venting connector bases, one barrier-free connecting pipe is communicated with an external cold source, and the explosion venting membrane assembly is arranged between the explosion venting connector bases and the explosion venting connectors. According to the utility model, explosion venting can be carried out by arranging the explosion venting port and the barrier-free connecting pipe, the explosion-proof performance of the Internet of Things sensor is improved, and cooling is carried out by conveying cold air into the protective shell, so that the sensor can work in a high-temperature environment.

Description

Technical Field

[0001] The utility model relates to the field of Internet of Things sensors, in particular to an explosion-proof and high-temperature resistant Internet of Things sensor. Background Art

[0002] Sensors are essential components in modern industry, scientific research, and daily life. They convert various physical and chemical signals into electrical signals for easy reading and processing. In explosive process control environments such as petrochemicals, oil and gas, mixtures of flammable substances and air may cause explosions under certain conditions. When using sensors in flammable and explosive environments, in order to avoid explosions, products with explosion-proof requirements are usually selected.

[0003] Currently, existing sensors generally improve their explosion-proof performance by setting a protective shell on the outside of the sensor. For example, the Chinese utility model patent application with publication number CN219329147U and publication date July 11, 2023 proposes a varistor protective shell with explosion-proof function, including a varistor protective shell body, an installation mechanism, an explosion-proof mechanism and a varistor mechanism. The installation mechanism is located on the outside of the varistor protective shell body, and the explosion-proof mechanism is located at the front end of the varistor protective shell body.

[0004] When in use, heat is dissipated through the heat dissipation holes, and the hardness of the protective shell is improved by setting reinforcing ribs.

[0005] Regarding the above-mentioned related technologies, when the sensor explodes, the sparks generated by the explosion may be transmitted to the outside of the protective shell through the heat dissipation holes, posing certain safety hazards. At the same time, if the protective shell is directly set as a sealed structure, the heat dissipation effect of the sensor will be poor, increasing the risk of the sensor exploding. Utility Model Content

[0006] In order to improve the safety of sensor use and reduce the probability of an explosion in the external environment caused by an explosion of the sensor, the utility model provides an explosion-proof and high-temperature resistant Internet of Things sensor.

[0007] The utility model provides an explosion-proof and high-temperature resistant Internet of Things sensor, which adopts the following technical solutions:

[0008] A kind of explosion-proof and high-temperature resistant Internet of Things sensor, comprising a sensor assembly and a protective shell, wherein the sensor assembly is arranged in the protective shell, and the sensor assembly comprises a circuit board, an Internet of Things module and a sensor module, the circuit board is fixedly installed inside the protective shell, the Internet of Things module and the sensor module are fixedly arranged on the circuit board, and the Internet of Things module and the sensor module are electrically connected; a window is provided at one end of the protective shell, the sensor module is provided corresponding to the window, and a sealing arrangement is formed between the protective shell and the sensor module, a sealing joint and an explosion vent are provided on the end of the protective shell away from the window, a cable is passed through the sealing joint and connected to the Internet of Things module, and an unobstructed connecting pipe is connected to the outside of the explosion vent, and the explosion vent connects the inside of the protective shell with the unobstructed connecting pipe; the other end of the barrier-free connecting pipe is also connected to an external cold source.

[0009] By adopting the above technical solution, the sensor module collects data from the outside of the protective shell through the window on the protective shell. When the IoT module and the sensor module on the circuit board age or a circuit failure causes an explosion, the protective shell can isolate the explosion impact on the circuit board and the sparks generated by the explosion inside the protective shell, preventing the sparks generated by the sensor explosion from being transmitted to the external environment. However, the impact generated by the explosion may damage the protective shell, causing the protective shell to rupture and causing sparks to be transmitted to the external environment. Therefore, an explosion vent is set on the protective shell, and the explosion vent is connected to the barrier-free connecting pipe. In this way, when an explosion occurs, the explosion impact will be slowed down by the explosion vent, thereby reducing the effect of the explosion impact on the protective shell. The barrier-free connecting pipe and the explosion vent will guide the impact and flames generated by the explosion along the barrier-free connecting pipe to a position outside the protective shell that will not cause danger, reducing the scattering of flames from the explosion vent to various positions outside the protective shell, and further improving the explosion-proof characteristics of the IoT sensor; at the same time, when the IoT sensor is working in a high-temperature environment or the temperature inside the protective shell is too high, the external cold source can be transported to the inside of the protective shell through the barrier-free connecting pipe, and the IoT sensor can be cooled by air heat transfer in the barrier-free connecting pipe, so that the IoT sensor can work normally in a high-temperature environment.

[0010] Optionally, an explosion vent joint seat is provided on the explosion vent, one end of the barrier-free connecting pipe is connected to an explosion vent joint, the barrier-free connecting pipe and the explosion vent joint are sealed connected, and the explosion vent joint is sealed connected to the explosion vent joint seat.

[0011] By adopting the above technical solution, during installation, the explosion vent connector base is first installed on the explosion vent of the protective shell, the explosion vent connector is connected to the barrier-free connecting pipe, and then the explosion vent connector and the explosion vent connector base are connected when in use. This simplifies the connection between the barrier-free connecting pipe and the explosion vent, making the connection between the barrier-free connecting pipe and the explosion vent easier and more convenient.

[0012] Optionally, an explosion-proof membrane assembly is arranged between the explosion-proof joint and the explosion-proof joint seat, and the explosion-proof membrane assembly includes an inner pressure ring, an outer pressure ring and a waterproof breathable membrane. The outer pressure ring is sleeved on the outer circumferential surface of the inner pressure ring, and the waterproof breathable membrane is arranged between the inner pressure ring and the outer pressure ring. One end of the outer pressure ring abuts against the explosion-proof joint seat, and the other end abuts against the explosion-proof joint.

[0013] By adopting the above technical solution, when installing the explosion-proof membrane assembly, first, the waterproof breathable membrane is stretched until it has no elasticity and flattened and then placed on the inner pressure ring. Secondly, the outer pressure ring is pressed on the other side of the waterproof breathable membrane, and pressure is applied to the end face of the outer pressure ring away from the inner pressure ring, so that the outer pressure ring is squeezed on the outer peripheral surface of the inner pressure ring, and the waterproof breathable membrane is compressed between the inner pressure ring and the outer pressure ring. Finally, the installed explosion-proof membrane assembly is installed between the explosion-proof joint seat and the explosion-proof joint. The setting of the explosion-proof membrane assembly ensures that when an explosion occurs inside the protective shell, the explosion impact will break the waterproof breathable membrane when passing through the explosion-proof port. In this process, the waterproof breathable membrane will absorb part of the impact, thereby reducing the transmission of the explosion impact in the barrier-free connecting pipe; because the waterproof breathable membrane is waterproof and breathable, it can also absorb part of the sparks generated by the explosion when it explodes and ruptures, reducing the damage to the barrier-free connecting pipe by the explosion. At the same time, the waterproof breathable membrane can also play a waterproof role when transporting cold air to the inside of the protective shell through the barrier-free connecting pipe to dissipate heat, reducing the damage caused by moisture in the external cold source entering the protective shell and causing damage to the circuit on the circuit board.

[0014] Optionally, a support platform is provided on the explosion-proof joint seat facing the interior away from one end of the protective shell, one end of the explosion-proof membrane assembly abuts against the support platform, and the other end abuts against the explosion-proof joint.

[0015] By adopting the above technical solution, when installing the explosion-venting membrane assembly, the explosion-venting membrane assembly is inserted into the explosion-venting joint seat and one end face of the explosion-venting membrane assembly is abutted against the support platform. Then, when the explosion-venting joint is inserted into the explosion-venting joint seat and connected by threads, the explosion-venting joint abuts against the other end face of the explosion-venting membrane assembly, thereby fixing the explosion-venting membrane assembly. This simplifies the installation of the explosion-venting membrane assembly and allows the explosion-venting membrane assembly to be replaced after use, saving the cost of using the explosion-venting membrane assembly.

[0016] Optionally, the protective shell is made of metal material, and the protective shell includes an upper shell and a lower shell. Connecting ear plates are provided on the opposite end surfaces of the upper shell and the lower shell, and the upper shell and the lower shell are fixedly connected by the connecting ear plates.

[0017] By adopting the above technical solution, the protective shell is divided into an upper shell and a lower shell, which facilitates the installation of the sensor component inside the protective shell. The connecting ear plate can strengthen the firmness of the connection between the upper shell and the lower shell. Setting the protective shell to a metal material can improve the firmness of the protective shell and enhance the protective shell's resistance to explosion impact and high temperature.

[0018] Optionally, a sealing groove is provided on the end surface opposite to the connecting ear plate, and a rubber pad or sealant is provided in the sealing groove.

[0019] By adopting the above technical solution, the setting of the sealing groove makes it possible to set a sealing structure such as a sealing strip between the upper shell and the lower shell, further increasing the sealing performance of the protective shell, reducing the probability of sparks generated by the explosion being transmitted from the connection gap between the upper shell and the lower shell to the outside of the protective shell, and improving the safety of the IoT sensor.

[0020] Optionally, two explosion vents and two barrier-free connecting pipes are provided, and one of the barrier-free connecting pipes is connected to an external cold source.

[0021] By adopting the above technical solution, two explosion vents are provided to increase the explosion-proofing capacity of the protective shell, further reducing the probability of damage to the protective shell caused by the explosion impact, and improving the explosion-proof ability of the protective shell. One of the two explosion vents is connected to an external cold source through an unobstructed connecting pipe. When cooling the interior of the protective shell, the cold air from the external cold source can be transported into the protective shell through one of the unobstructed connecting pipes. The other unobstructed connecting pipe connected to the protective shell is used for exhaust, so that the air inside the protective shell can be immersed in the circulation, accelerating the efficiency of cooling the interior of the protective shell. In this way, the explosion-proof ability of the protective shell can be improved while further improving the high-temperature resistance of the IoT sensor.

[0022] Optionally, a temperature sensor is further provided on the circuit board, and the temperature sensor is electrically connected to an external cold source.

[0023] By adopting the above technical solution, the temperature sensor can monitor the temperature inside the protective shell in real time. When the temperature inside the protective shell is higher than the operating temperature of the IoT sensor, the temperature sensor sends information to the external cold source to control the external cold source to supply cold air to the inside of the protective shell to cool the sensor components inside the protective shell. In this way, the inside of the protective shell can be automatically cooled in a high temperature environment, and the cooling will stop when the temperature inside the protective shell is normal, so that the IoT sensor can control the temperature of the working environment by itself, reduce the adverse effects of altitude on the IoT sensor, and extend the service life of the IoT sensor.

[0024] In summary, the present invention has at least one of the following beneficial technical effects:

[0025] 1. By setting an explosion vent on the protective shell and connecting the explosion vent to the barrier-free connecting pipe, when an explosion occurs inside the protective shell, the explosion shock and sparks generated by the explosion will be released through the explosion vent and transmitted along the barrier-free connecting pipe to a position outside the protective shell where they will not cause any impact. In this way, when an explosion occurs inside the protective shell, the explosion can be vented through the explosion vent, reducing the damage to the protective shell caused by the explosion shock, and making the flames generated by the explosion transmit from the inside of the protective shell to cause potential risks, thereby improving the explosion-proof performance of the IoT sensor.

[0026] 2. Connect the barrier-free connecting pipe to an external cold source and install a temperature sensor inside the protective shell. This allows the inside of the protective shell to cool down automatically when the temperature inside the protective shell is higher than the operating temperature of the IoT sensor. Two barrier-free connecting pipes are installed to connect the protective shell to allow air to circulate inside the protective shell, improving the cooling efficiency of the protective shell and thereby improving the high-temperature resistance of the IoT sensor.

[0027] 3. An explosion-venting joint seat, an explosion-venting joint and an explosion-venting membrane assembly are arranged between the protective shell and the barrier-free connecting pipe. The explosion-venting joint seat is connected to the protective shell, the explosion-venting joint is connected to the barrier-free connecting pipe, and the explosion-venting membrane assembly is arranged between the explosion-venting joint seat and the explosion-venting joint. On the one hand, it can simplify the connection method between the barrier-free connecting pipe and the protective shell. On the other hand, the explosion-venting membrane assembly can slow down the impact and sparks generated by the explosion from being transmitted inside the barrier-free connecting pipe, thereby improving the service life of the barrier-free connecting pipe. At the same time, the explosion-venting membrane assembly can be easily replaced, thereby reducing the use cost of explosion-proof and high-temperature resistant IoT sensors. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the utility model;

[0029] Figure 2 This is a schematic diagram of the overall structure of an embodiment of the utility model from another perspective;

[0030] Figure 3 This is an exploded schematic diagram of the overall structure of an embodiment of the utility model;

[0031] Figure 4 yes Figure 3 A partially enlarged schematic diagram of part I.

[0032] Explanation of the accompanying drawings: 1. Sensor assembly; 11. Circuit board; 12. Internet of Things module; 13. Sensor module; 14. Temperature sensor; 2. Protective shell; 21. Window; 22. Sealing joint; 23. Explosion vent; 24. Upper shell; 25. Lower shell; 26. Connecting ear plate; 27. Sealing groove; 3. Barrier-free connecting pipe; 4. External cold source; 5. Explosion vent joint seat; 51. Support platform; 6. Explosion vent joint; 7. Explosion vent membrane assembly; 71. Inner pressure ring; 72. Outer pressure ring; 73. Waterproof and breathable membrane. DETAILED DESCRIPTION

[0033] The following combination Figures 1 to 4 The utility model is described in further detail.

[0034] The present invention discloses an explosion-proof and high temperature resistant IoT sensor. Figures 1 to 3 An explosion-proof and high-temperature resistant Internet of Things sensor mainly includes a sensor component 1, a protective shell 2, a barrier-free connecting pipe 3, an external cold source 4, an explosion-proof joint seat 5, an explosion-proof joint 6 and an explosion-proof membrane assembly 7. The sensor component 1 is installed inside the protective shell 2. Two explosion-proof joint seats 5 are provided on the protective shell 2. An explosion-proof joint 6 is provided at one end of the barrier-free connecting pipe 3. The barrier-free connecting pipe 3 is connected to the protective shell 2 by connecting the explosion-proof joint 6 to the explosion-proof joint seat 5. There are two barrier-free connecting pipes 3, and both barrier-free connecting pipes 3 are connected to the inside of the protective shell 2. One of the barrier-free connecting pipes 3 is connected to the external cold source 4, and the explosion-proof membrane assembly 7 is arranged between the explosion-proof joint seat 5 and the explosion-proof joint 6. When the Internet of Things sensor is working, the sensor component 1 works inside the protective shell 2. When the temperature inside the protective shell 2 is higher than the working temperature of the sensor component 1, the external cold source 4 delivers cold air to the inside of the protective shell 2 through the barrier-free connecting pipe 3 to cool the inside of the protective shell 2, so that the temperature inside the protective shell 2 is maintained within the normal operating temperature range of the sensor component 1; when the sensor component 1 inside the protective shell 2 explodes, the explosion impact will break through the explosion-proof membrane component 7 between the explosion-proof joint seat 5 and the explosion-proof joint 6. At this time, the explosion impact and the sparks generated by the explosion will enter the barrier-free connecting pipe 3 through the explosion-proof joint seat 5 and the explosion-proof joint 6, and be transmitted along the barrier-free connecting pipe 3 to a place outside the protective shell 2 where there will be no danger. In this way, the explosion inside the protective shell 2 can be isolated from the external environment of the protective shell 2, so that the flame generated by the explosion cannot have an adverse effect on the external environment of the protective shell 2, thereby making the Internet of Things sensor resistant to high temperature and explosion-proof.

[0035] Reference Figures 2 to 3The protective shell 2 includes an upper shell 24 and a lower shell 25. The upper shell 24 and the lower shell 25 are both made of aluminum alloy by die-casting. A semi-circular opening is provided at one end of the upper shell 24 and the lower shell 25, so that a window 21 is formed after the upper shell 24 and the lower shell 25 are combined. A connecting ear plate 26 is provided on the outer edge of the opposite end surface of the upper shell 24 and the lower shell 25. A threaded hole is provided on the connecting ear plate 26 so that the upper shell 24 and the lower shell 25 can be fixedly connected. A sealing groove 27 is provided on the opposite end surface of the upper shell 24 and the lower shell 25. A sealing strip is placed in the sealing groove 27 to increase the sealing effect of the upper shell 24 and the lower shell when the upper shell 24 and the lower shell 25 are connected. 25, the upper shell 24 and the lower shell 25 are respectively provided with three annular openings on the side away from the window 21, and the three annular openings are arranged in a straight line. A sealing joint 22 is installed in the middle annular opening, and the data cable is passed through the sealing joint 22 and connected to the circuit board 11 at one end, further enhancing the sealing of the protective shell 2, and the annular openings on both sides of the sealing joint 22 are two explosion-proof ports 23, and two explosion-proof connector seats 5 are respectively installed in the explosion-proof ports 23. After the upper shell 24 and the lower shell 25 are connected, the sealing joint 22 and the explosion-proof connector seat 5 can be fixed in the annular opening.

[0036] Reference Figures 1 to 3 The sensor assembly 1 includes a circuit board 11, an Internet of Things module 12, a sensor module 13 and a temperature sensor 14. A plurality of fixed threaded columns are arranged inside the lower shell 25, and a plurality of through-holes corresponding to the fixed threaded columns are arranged on the circuit board 11. The circuit board 11 can be fixed to the lower shell 25 by installing screws in the through-holes and fixed threaded columns of the circuit board 11. The Internet of Things module 12, the sensor module 13 and the temperature sensor 14 are all arranged on the circuit board 11 and connected by electrical signals. The sensor module 13 is arranged corresponding to the window 21 on the protective shell 2, so that the Internet of Things module 12 can collect data through the window 21.

[0037] Reference Figures 3 and 4 The explosion-proof joint seat 5 is arranged in the explosion-proof port 23 of the protective shell 2, and the inner circumferential surface of the explosion-proof joint seat 5 is provided with a threaded structure. A support platform 51 is provided inside the end of the explosion-proof joint seat 5 facing away from the viewing window 21. The support platform 51 is a circular support platform 51 with a diameter smaller than the internal thread of the explosion-proof joint seat 5. One end of the explosion-proof joint 6 is fixedly set at the end of the barrier-free connecting pipe 3. The barrier-free connecting pipe 3 is a metal hose and the outside of the metal hose is covered with rubber insulation material. The outer circumferential surface of the explosion-proof joint 6 is provided with a threaded structure that cooperates with the explosion-proof joint seat 5. When the explosion-proof joint 6 is connected to the explosion-proof joint seat 5 through the threaded structure, a gap is left between the end of the explosion-proof joint 6 and the support platform 51 for installing the explosion-proof membrane assembly 7.

[0038] Reference Figure 4The explosion-proof membrane assembly 7 includes an inner pressure ring 71, an outer pressure ring 72 and a waterproof breathable membrane 73, wherein the diameter of the outer circumference of the outer pressure ring 72 is the same as the diameter of the outer circumference of the support platform 51, and the diameter of the inner circumference of the inner pressure ring 71 is the same as the diameter of the outer circumference of the inner pressure ring 71. The waterproof breathable membrane 73 is made of expanded polytetrafluoroethylene. The waterproof breathable membrane 73 is stretched and flattened and then laid on the inner pressure ring 71 and the outer pressure ring 72 is pressed on the inner pressure ring 71 to fix the waterproof breathable membrane 73 between the inner pressure ring 71 and the outer pressure ring 72 to complete the assembly of the explosion-proof membrane assembly 7. When installing the position of the explosion-proof membrane assembly 7, the explosion-proof membrane assembly 7 is installed inside the explosion-proof joint seat 5 and the explosion-proof joint seat 5 is abutted on the support platform 51, and then the explosion-proof joint 6 is tightened on the explosion-proof joint seat 5 by threading, so that the end of the explosion-proof joint 6 abuts against the other end of the explosion-proof membrane assembly 7 to fix the explosion-proof membrane assembly 7.

[0039] The implementation principle of an explosion-proof and high-temperature resistant Internet of Things sensor in an embodiment of the present utility model is as follows: during installation, the connected sensor assembly 1 is first fixedly installed on the upper shell 24, and the sensor module 13 is aligned with the window 21 and fixed, followed by installing a sealing strip in the sealing groove 27, installing the sealing joint 22 on the lower shell 25, and setting the explosion-proof joint seat 5 in the explosion-proof port 23, connecting the data line to the circuit board 11 and then passing through the sealing joint 22 to connect to the outside of the protective shell 2, and again connecting the upper shell 24 to the lower shell 25 on the upper shell 24 by installing fixing screws on the connecting ear plate 26 to complete the sealing installation of the protective shell 2, and finally placing the explosion-proof membrane assembly 7 in the support platform 51 inside the explosion-proof joint seat 5, and connecting the barrier-free connecting pipe 3 to the explosion-proof joint seat 5 through the explosion-proof joint 6, and connecting one of the barrier-free connecting pipes 3 to the external cold source 4 to complete the connection of the explosion-proof membrane assembly 7 and the barrier-free connecting pipe 3 to the protective shell 2.

[0040] When the Internet of Things sensor is working, the temperature sensor 14 will monitor the temperature inside the protective shell 2 in real time, and when the temperature inside the protective shell 2 is higher than the working temperature of the sensor component 1, the temperature sensor 14 will send a signal to the external cold source 4, and the external cold source 4 will transport cold air to the inside of the protective shell 2 through the barrier-free connecting pipe 3 to cool the inside of the protective shell 2, so that the protective shell 2 can work normally in a high-temperature environment; when the sensor component 1 explodes, the explosion shock and the sparks generated by the explosion will enter the barrier-free connecting pipe 3 through the explosion venting port 23, and the explosion shock will break the explosion-proof membrane assembly 7 in the explosion-proof joint seat 5. When the explosion-proof membrane assembly 7 is broken, it will absorb part of the impact and reduce the damage of the explosion shock to the barrier-free connecting pipe 3. At the same time, the barrier-free connecting pipe 3 will transfer the explosion shock and the flame generated by the explosion to a place outside the protective shell 2 where there is no danger, thereby realizing the explosion-proof of the Internet of Things sensor.

[0041] To sum up, the present application performs explosion relief by setting up an explosion relief port 23 and an accessible connecting pipe 3. When an explosion occurs inside the protective shell 2, the damage to the protective shell 2 caused by the explosion impact can be reduced, and the probability of the flame generated by the explosion being transmitted from the inside of the protective shell 2 to cause potential risks is improved, thereby improving the explosion-proof performance of the Internet of Things sensor; the accessible connecting pipe 3 is connected to the external cold source 4, and a temperature sensor 14 is set inside the protective shell 2. When the temperature inside the protective shell 2 is higher than the working temperature of the Internet of Things sensor, the inside of the protective shell 2 can be cooled automatically, thereby improving the high-temperature resistance of the Internet of Things sensor; an explosion relief joint seat 5, an explosion relief joint 6 and an explosion relief membrane assembly 7 are set between the protective shell 2 and the accessible connecting pipe 3, which simplifies the connection method between the accessible connecting pipe 3, the explosion relief membrane assembly 7 and the protective shell 2, and makes the explosion relief membrane assembly 7 easy to replace, thereby reducing the use cost of the explosion-proof and high-temperature resistant Internet of Things sensor.

[0042] The above are all preferred embodiments of the present invention, and are not intended to limit the scope of protection of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the scope of protection of the present invention.

Claims

1. An explosion-proof and high-temperature resistant Internet of Things sensor, comprising a sensor assembly (1) and a protective shell (2), wherein the sensor assembly (1) is arranged in the protective shell (2), and is characterized in that: The sensor assembly (1) comprises a circuit board (11), an Internet of Things module (12) and a sensor module (13); the circuit board (11) is fixedly mounted inside the protective shell (2); the Internet of Things module (12) and the sensor module (13) are fixedly arranged on the circuit board (11); and the Internet of Things module (12) and the sensor module (13) are electrically signal-connected; A window (21) is provided at one end of the protective shell (2), and the sensor module (13) is provided corresponding to the window (21). A sealing arrangement is formed between the protective shell (2) and the sensor module (13). A sealing joint (22) and an explosion vent (23) are provided at one end of the protective shell (2) away from the window (21). A cable is passed through the sealing joint (22) and connected to the Internet of Things module (12). The explosion vent (23) is externally connected to a barrier-free connecting pipe (3), and the explosion vent (23) connects the interior of the protective shell (2) with the barrier-free connecting pipe (3); the other end of the barrier-free connecting pipe (3) is also connected to an external cold source (4).

2. The explosion-proof and high-temperature resistant IoT sensor according to claim 1, characterized in that: An explosion relief joint seat (5) is provided on the explosion relief opening (23), one end of the barrier-free connecting pipe (3) is connected to an explosion relief joint (6), the barrier-free connecting pipe (3) and the explosion relief joint (6) are sealedly connected, and the explosion relief joint (6) and the explosion relief joint seat (5) are sealedly connected.

3. The explosion-proof and high-temperature resistant IoT sensor according to claim 2, characterized in that: An explosion-relief membrane assembly (7) is provided between the explosion-relief joint (6) and the explosion-relief joint seat (5), and the explosion-relief membrane assembly (7) comprises an inner pressure ring (71), an outer pressure ring (72) and a waterproof breathable membrane (73), wherein the outer pressure ring (72) is sleeved on the outer circumference of the inner pressure ring (71), and the waterproof breathable membrane (73) is provided between the inner pressure ring (71) and the outer pressure ring (72), and one end of the outer pressure ring (72) abuts against the explosion-relief joint seat (5), and the other end abuts against the explosion-relief joint (6).

4. The explosion-proof and high-temperature resistant IoT sensor according to claim 3, characterized in that: A support platform (51) is provided in the explosion relief joint seat (5) toward the interior of one end away from the protective shell (2); one end of the explosion relief membrane assembly (7) abuts against the support platform (51), and the other end abuts against the explosion relief joint (6).

5. The explosion-proof and high-temperature resistant IoT sensor according to any one of claims 1 to 4, characterized in that: The protective shell (2) is made of metal material and comprises an upper shell (24) and a lower shell (25). Connecting ear plates (26) are provided on opposite end surfaces of the upper shell (24) and the lower shell (25). The upper shell (24) and the lower shell (25) are fixedly connected via the connecting ear plates (26).

6. The explosion-proof and high-temperature resistant IoT sensor according to claim 5, characterized in that: The end surface opposite to the connecting ear plate (26) is provided with a sealing groove (27), and a rubber pad or sealing glue is provided in the sealing groove (27).

7. The explosion-proof and high-temperature resistant IoT sensor according to any one of claims 1 to 4, characterized in that: Two explosion vents (23) and two barrier-free connecting pipes (3) are provided, and one barrier-free connecting pipe (3) is connected to the external cold source (4).

8. The explosion-proof and high-temperature resistant IoT sensor according to claim 7, characterized in that: A temperature sensor (14) is also provided on the circuit board (11), and the temperature sensor (14) is electrically connected to the external cold source (4).

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