Explosion-proof safety production gas detector

Abstract

The utility model relates to safe detection instrument technical field, concretely relates to a kind of explosion-proof safety production gas detector, including explosion-proof shell, detection unit being arranged in the inside of explosion-proof shell and the air inlet of bottom and the air outlet of top of explosion-proof shell, the explosion-proof shell is formed by main casing and the explosion-proof back cover connected with main casing by bolt;The inside of main casing is separated into airtight isolated detection cavity and electric cavity by heat-conducting partition, and the detection unit is arranged in detection cavity;The central portion of heat-conducting partition is embedded with heat-conducting silica gel pad, one side of heat-conducting silica gel pad is in thermal contact with detection unit, and the other side is connected with radiator extending to electric cavity;Circuit mainboard is arranged in electric cavity, and the radiator is in thermal contact with the back of circuit mainboard;Cooling hole group, which is communicated with electric cavity, is formed on the explosion-proof back cover, and the cooling hole group is formed by multiple tiny through holes meeting explosion-proof standard.

Description

Technical Field

[0001] This utility model relates to the field of safety detection instrument technology, specifically to an explosion-proof safety production gas detector. Background Technology

[0002] Explosion-proof safety gas detectors are special instruments that use sensor technology to detect the concentration of combustible and toxic gases in the work environment in real time. Their core function is to trigger an alarm when the gas concentration exceeds the limit, so as to protect the lives of production personnel and the safety of equipment operation.

[0003] Traditional explosion-proof gas detectors typically use a fully enclosed metal casing for explosion protection, but this has the following prominent problems: First, the detection unit and the main circuit board are housed in the same cavity, and the heat generated by the sensor during operation is superimposed on the heat generated by the electrical components, which can easily lead to excessively high local temperatures, affecting sensor accuracy and even causing electronic components to fail. Second, the detection unit is mostly a fixed installation structure, and maintenance or calibration requires disassembling the entire explosion-proof casing, which is complex and carries the risk of accidentally touching live parts. Third, the casing seal relies on a single sealing structure, and after long-term use, the airtightness is prone to decrease due to aging or vibration, failing to meet the explosion-proof requirements. Fourth, dust and moisture from the external environment can easily enter the interior through the air inlet, affecting detection accuracy and equipment reliability. Utility Model Content

[0004] The purpose of this utility model is to provide an explosion-proof safety gas detector that solves the problems of "contradiction between airtight explosion protection and efficient heat dissipation", "inconvenient maintenance of detection unit" and "insufficient environmental adaptability" in traditional detectors through structural optimization, thereby improving the safety, reliability and maintenance efficiency of the equipment.

[0005] The present invention provides an explosion-proof safety gas detector, comprising an explosion-proof housing, a detection unit disposed inside the explosion-proof housing, and an air inlet at the bottom and an air outlet at the top of the explosion-proof housing. The explosion-proof housing consists of a main housing and an explosion-proof rear cover connected to the main housing by bolts. The interior of the main housing is divided into an airtight detection chamber and an electrical chamber by a thermally conductive partition. The detection unit is disposed in the detection chamber. A thermally conductive silicone pad is embedded in the center of the thermally conductive partition. One side of the thermally conductive silicone pad is in thermal contact with the detection unit, and the other side is connected to a heat sink extending into the electrical chamber. A circuit board is disposed in the electrical chamber. The heat sink is in thermal contact with the back of the circuit board. A control panel connected to the circuit board is disposed on the front of the main housing. A group of heat dissipation holes communicating with the electrical chamber is provided on the explosion-proof rear cover. The group of heat dissipation holes consists of multiple micro-through holes conforming to explosion-proof standards.

[0006] As a preferred embodiment of this invention, the detection unit has a modular structure and is electrically connected to the circuit board via a plug-in interface. The detection unit can be replaced by pulling it out entirely from the main housing after opening the explosion-proof back cover, and the detection unit is fixedly connected to the inside of the detection cavity by bolts.

[0007] As a preferred embodiment of this utility model, a guide groove is provided inside the detection cavity. The inner side of the guide groove is an S-shaped structure connecting the air inlet and the air outlet. The middle position of the guide groove is adapted to the shape of the detection unit. The plug-in interface is located at the end of the insertion direction of the detection unit along the middle of the guide groove.

[0008] As a preferred embodiment of this utility model, a sealing ring is provided at the joint between the main housing and the explosion-proof rear cover, the bottom of the heat-conducting partition is integral with the main housing, and a sealing sheet is provided at the joint between the other end and the explosion-proof rear cover.

[0009] As a preferred embodiment of this utility model, a waterproof, dustproof, and breathable membrane is provided at the air inlet, and a miniature explosion-proof fan is provided inside the air outlet.

[0010] As a preferred technical solution of this utility model, the explosion-proof shell is covered with a protective frame made of elastic impact-resistant material, and the protective frame is fixedly connected to the main shell by bolts.

[0011] As a preferred technical solution of this utility model, the heat sink is one of aluminum extruded heat sink fins or heat pipes, and the heat sink is located at the heat dissipation hole group of the explosion-proof back cover.

[0012] As a preferred embodiment of this invention, the outer surface of the explosion-proof housing is coated with a corrosion-resistant coating.

[0013] As a preferred embodiment of this invention, the control panel includes a display screen and multiple adjustment buttons.

[0014] The advantages of this utility model compared with the prior art are as follows:

[0015] 1. Explosion-proof and heat dissipation synergistic optimization: The main housing is divided into an airtight detection chamber and an electrical chamber by a thermally conductive partition, which prevents flammable gas from entering the electrical chamber and causing an explosion risk. At the same time, the thermally conductive silicone pad and the heat sink form a "heat conduction channel" to conduct the heat from the detection unit and the circuit board to the electrical chamber in a synchronous manner. Finally, the heat is evenly dissipated through the small heat dissipation holes of the explosion-proof back cover, which solves the contradiction between "sealed explosion-proof" and "efficient heat dissipation" in traditional solutions.

[0016] 2. Modular maintenance design: The testing unit adopts a pluggable interface and guide slot structure, combined with an installation method that can be pulled out as a whole. Maintenance or calibration can be completed simply by opening the explosion-proof back cover, without disassembling the main housing or disconnecting complex circuits, which significantly improves maintenance efficiency and reduces operational risks.

[0017] 3. Multiple seals ensure explosion-proof reliability: The sealing rings of the main shell and the explosion-proof rear cover, and the sealing plates of the heat-conducting baffle and the explosion-proof rear cover form a double sealing structure, effectively isolating external gas intrusion and meeting high-level explosion-proof requirements (such as Ex d IIBT4 Gb).

[0018] 4. Enhanced environmental adaptability: The waterproof and dustproof breathable membrane at the air inlet can filter pollutants such as dust and water vapor, ensuring the measurement accuracy of the detection unit; the miniature explosion-proof fan at the air outlet actively accelerates the gas flow, avoiding gas stagnation in the detection chamber, making it suitable for complex industrial environments with high humidity and high dust.

[0019] 5. Enhanced impact resistance and durability: The external elastic impact-resistant protective frame can absorb the impact force generated by external collisions and drops, protecting the internal explosion-proof structure from damage; the surface corrosion-resistant coating can resist the erosion of chemical corrosive gases and extend the service life of the equipment. Attached Figure Description

[0020] Figure 1 The present invention relates to the structure of an explosion-proof safety gas detector. Figure 1 .

[0021] Figure 2 The present invention relates to the structure of an explosion-proof safety gas detector. Figure 2 .

[0022] Figure 3 This is an internal structural diagram of an explosion-proof safety gas detector according to this utility model.

[0023] Figure 4 This is a longitudinal cross-sectional three-dimensional structural diagram of an explosion-proof safety gas detector according to this utility model.

[0024] Figure 5 This is a cross-sectional three-dimensional structural diagram of an explosion-proof safety gas detector according to this utility model.

[0025] As shown in the figure:

[0026] 1. Explosion-proof housing; 2. Detection unit; 3. Air inlet; 4. Air outlet; 5. Main housing; 6. Explosion-proof rear cover; 7. Thermally conductive baffle; 8. Detection chamber; 9. Electrical chamber; 10. Thermally conductive silicone pad; 11. Heat sink; 12. Circuit board; 13. Control panel; 14. Heat dissipation holes; 15. Plug-in interface; 16. Guide slot; 17. Sealing ring; 18. Sealing sheet; 19. Waterproof, dustproof, and breathable membrane; 20. Miniature explosion-proof fan; 21. Protective frame; 22. Display screen; 23. Adjustment buttons. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0029] Example 1:

[0030] As per the instruction manual Figure 1-5 As shown, an explosion-proof safety gas detector includes an explosion-proof housing 1, a detection unit 2 disposed inside the explosion-proof housing 1, an air inlet 3 at the bottom of the explosion-proof housing 1 and an air outlet 4 at the top. A waterproof, dustproof and breathable membrane 19 is provided at the air inlet 3, and a miniature explosion-proof fan 20 is provided inside the air outlet 4.

[0031] In this utility model, the outer surface of the explosion-proof housing 1 is coated with a corrosion-resistant coating with a thickness of 50μm, which can withstand the erosion of corrosive gases such as hydrochloric acid and ammonia with a concentration of 30%. The explosion-proof housing 1 is composed of a main housing 5 and an explosion-proof rear cover 6 connected to the main housing 5 by bolts. The explosion-proof housing 1 is covered with a protective frame 21 made of elastic impact-resistant material, specifically polycarbonate (PC). The protective frame 21 is fixedly connected to the main housing 5 by bolts.

[0032] In this utility model, the interior of the main housing 5 is divided into an airtight detection chamber 8 and an electrical chamber 9 by a heat-conducting partition 7. The detection chamber 8 is provided with a guide groove 16. The inner side of the guide groove 16 is an S-shaped structure connecting the air inlet 3 and the air outlet 4. The middle position is adapted to the shape of the detection unit 2. The detection unit 2 is set in the detection chamber 8 and has a modular structure. It is electrically connected to the circuit board 12 through a plug-in interface 15. The detection unit 2 can be replaced by opening the explosion-proof back cover 6 and pulling it out of the main housing 5 as a whole. The detection unit 2 is fixedly connected to the inside of the detection chamber 8 by bolts. The plug-in interface 15 is located at the end of the insertion direction of the detection unit 2 along the middle of the guide groove 16.

[0033] In this utility model, a thermally conductive silicone pad 10 is embedded in the center of the thermally conductive partition 7. One side of the thermally conductive silicone pad 10 is in thermal contact with the detection unit 2, and the other side is connected to a heat sink 11 extending to the electrical cavity 9. A sealing ring 17 made of nitrile rubber is provided at the joint between the main housing 5 and the explosion-proof back cover 6. The bottom of the thermally conductive partition 7 is an integral structure with the main housing 5, and a sealing sheet 18 made of silicone rubber is provided at the joint between the other end and the explosion-proof back cover 6.

[0034] In this utility model, a circuit board 12 (integrating an STM32 series microcontroller, signal conditioning circuit, and power module) is provided inside the electrical cavity 9. The heat sink 11 is in thermal contact with the back of the circuit board 12. The front of the main housing 5 is provided with a control panel 13 connected to the circuit board 12. The control panel 13 includes a 1.3-inch OLED display screen 22 and four adjustment buttons 23 (menu button, confirmation button, and plus / minus buttons) for displaying data and adjusting parameters. The display screen 22 and the adjustment buttons are sealed to the main housing 5 by adhesive, and the surface can be covered with a waterproof membrane. The circuit board 12 integrates a battery for power supply, and the circuit board 12 is provided with a charging interface on one side of the main housing 5, as well as certain data connection ports for data connection. Silicone dust plugs are provided at these interfaces.

[0035] In this utility model, the explosion-proof back cover 6 is provided with a heat dissipation hole group 14 that communicates with the electrical cavity 9. The heat dissipation hole group 14 is composed of multiple tiny through holes that meet the explosion-proof standard. The heat sink 11 is an aluminum extruded heat dissipation fin, and the heat sink 11 is located at the heat dissipation hole group 14 of the explosion-proof back cover 6.

[0036] Working principle

[0037] I. Gas Detection Process

[0038] 1. The external gas to be tested enters the detection chamber 8 through the waterproof and dustproof breathable membrane 19 (pore size 0.2μm) of the air inlet 3, and flows to the detection unit 2 after filtering out dust and water vapor;

[0039] 2. The detection unit 2 (such as a combustible gas sensor) detects the gas concentration and outputs an electrical signal to the main circuit board 12;

[0040] 3. After the circuit main board 12 amplifies and converts the signal from analog to digital, the real-time concentration value is displayed on the screen of the control panel 13. If the concentration value exceeds the preset threshold, an audible and visual alarm will be triggered.

[0041] 4. The detected gas is accelerated and discharged through the miniature explosion-proof fan 20 at the outlet 4, forming a continuous airflow cycle of "intake-detection-exhaust" to avoid gas stagnation.

[0042] II. Heat conduction process

[0043] 1. The heat generated by the detection unit 2 and the circuit board 12 during operation is transferred to the thermally conductive silicone pad 10 and the back of the circuit board 12, respectively.

[0044] 2. The thermally conductive silicone pad 10 conducts heat to the aluminum extruded heat sink fins, and the heat sink fins rapidly diffuse heat into the electrical cavity 9 by increasing the surface area;

[0045] 3. The heat inside the electrical cavity 9 is evenly dissipated to the external environment through the heat dissipation holes 14 (micro-holes) of the explosion-proof back cover 6. Since the diameter of the holes is smaller than the critical aperture (≤1.2mm) required for the minimum ignition energy of combustible gas, there is no risk of explosion.

[0046] III. Protection Mechanism

[0047] 1. Explosion-proof protection: The airtight isolation between the detection chamber 8 and the electrical chamber 9 (sealing ring 17 + sealing sheet 18) and the explosion-proof design of the heat dissipation hole group 14 (micro-through holes) together meet the Ex d IIB T4 Gb explosion-proof level requirements;

[0048] 2. Environmental protection: Waterproof, dustproof and breathable membrane 19 blocks external pollutants from entering, mini explosion-proof fan 20 accelerates gas flow to avoid condensation accumulation, and corrosion-resistant coating resists chemical erosion.

[0049] 3. Mechanical protection: The external protective frame 21 absorbs impact energy and prevents deformation of the main housing 5; the design of the guide slot 16 and the plug-in interface 15 reduces the time required for maintenance and the risk of mechanical damage.

[0050] The present invention and its embodiments have been described above. This description is not restrictive, and the specific embodiments shown are only one of the embodiments of the present invention. The actual structure is not limited to this. In short, if a person skilled in the art is inspired by this description and designs a similar structure and embodiment without departing from the inventive spirit of the present invention, such design should fall within the protection scope of the present invention.

Claims

1. An explosion-proof safety gas detector, comprising an explosion-proof housing (1), a detection unit (2) disposed inside the explosion-proof housing (1), and an air inlet (3) located at the bottom and an air outlet (4) located at the top of the explosion-proof housing (1), characterized in that: The explosion-proof enclosure (1) consists of a main housing (5) and an explosion-proof rear cover (6) connected to the main housing (5) by bolts; The interior of the main housing (5) is divided into an airtight detection chamber (8) and an electrical chamber (9) by a heat-conducting partition (7), and the detection unit (2) is disposed in the detection chamber (8); The thermally conductive partition (7) has a thermally conductive silicone pad (10) embedded in the center. One side of the thermally conductive silicone pad (10) is in thermal contact with the detection unit (2), and the other side is connected to a radiator (11) extending to the electrical cavity (9). The electrical cavity (9) is provided with a circuit board (12), the heat sink (11) is in thermal contact with the back of the circuit board (12), and the front of the main housing (5) is provided with a control panel (13) connected to the circuit board (12). The explosion-proof back cover (6) is provided with a heat dissipation hole group (14) that communicates with the electrical cavity (9). The heat dissipation hole group (14) is composed of multiple micro-through holes that meet the explosion-proof standard.

2. The explosion-proof safety gas detector according to claim 1, characterized in that: The detection unit (2) has a modular structure and is electrically connected to the circuit motherboard (12) through a plug-in interface (15).

3. The explosion-proof safety gas detector according to claim 2, characterized in that: The detection cavity (8) is provided with a guide slot (16). The inner side of the guide slot (16) is an S-shaped structure connecting the air inlet (3) and the air outlet (4). The middle position is adapted to the shape of the detection unit (2). The plug-in interface (15) is located at the end of the insertion direction of the detection unit (2) along the middle of the guide slot (16).

4. The explosion-proof safety gas detector according to claim 1, characterized in that: A sealing ring (17) is provided at the joint between the main housing (5) and the explosion-proof rear cover (6). The bottom of the heat-conducting baffle (7) is integral with the main housing (5), and a sealing sheet (18) is provided at the joint between the other end and the explosion-proof rear cover (6).

5. The explosion-proof safety gas detector according to claim 1, characterized in that: A waterproof and dustproof breathable membrane (19) is provided at the air inlet (3), and a miniature explosion-proof fan (20) is provided inside the air outlet (4).

6. The explosion-proof safety gas detector according to claim 1, characterized in that: The explosion-proof housing (1) is covered with a protective frame (21) made of elastic impact-resistant material, and the protective frame (21) is fixedly connected to the main housing (5) by bolts.

7. The explosion-proof safety gas detector according to claim 1, characterized in that: The radiator (11) is one of aluminum extruded heat dissipation fins or heat pipes, and the radiator (11) is located at the heat dissipation hole group (14) of the explosion-proof back cover (6).

8. The explosion-proof safety gas detector according to claim 1, characterized in that: The outer surface of the explosion-proof housing (1) is coated with a corrosion-resistant coating.

9. The explosion-proof safety gas detector according to claim 1, characterized in that: The control panel (13) includes a display screen (22) and multiple adjustment buttons (23).

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