Combustible gas explosion-proof sensor

Abstract

The utility model belongs to the field of combustible gas detection, specifically is a kind of combustible gas explosion-proof sensor, including sensor main body, the bottom of sensor main body is fixedly connected with connector, the bottom of connector is threadedly connected with mounting sleeve;The filter screen set in the bottom of mounting sleeve can filter the particulate matter and impurities in the inhaled gas, avoid the problem that these impurities follow the gas into the inside of mounting sleeve and connector and cause the influence detection effect problem, and in bad weather, by fan, external gas is actively drawn into the inside of mounting sleeve and connector, simultaneously, the output end of electric push rod drives baffle to rise, that is, the air intake capacity can be enlarged through air inlet hole, cooperate with the active air suction of fan, overcome the difficulty that wind power hinders combustible gas to enter mounting sleeve and connector in bad weather, effectively improve the detection efficiency of combustible gas of the device, and then improve the detection accuracy of combustible gas of the device.

Description

Technical Field

[0001] This utility model relates to the field of combustible gas detection, specifically a combustible gas explosion-proof sensor. Background Technology

[0002] In recent years, the national gas industry has developed rapidly. Liquefied petroleum gas (LPG), natural gas, coal gas, and other gases have been widely used in industry and commerce as energy sources. As a new type of energy, its popularization and application have undoubtedly played a significant role in improving the environmental quality of cities. However, with its widespread use, improper use or leakage of these gases can be harmful to health, prone to explosion, and pose numerous hidden dangers and accidents. If gas leaks are not detected and dealt with in a timely manner, they can cause catastrophic harm to society and residents. This, to some extent, increases the insecurity and instability of cities. For industries that widely use gas, such as petroleum, chemical, coal, metallurgy, gas, and coking, any place where flammable and explosive gases are produced, stored, or used needs a monitoring system to ensure the safety of people, production, and property.

[0003] Since places where combustible gases are used require good ventilation, strong winds in bad weather can prevent combustible gases from entering the sensor, thus reducing detection efficiency and accuracy. In addition, the gas carries some particulate matter and impurities. If these impurities enter the sensor along with the gas, it will also cause a decrease in detection accuracy. Existing sensors do not include impurity filtering and removal functions.

[0004] Therefore, a combustible gas explosion-proof sensor is proposed to address the above problems. Utility Model Content

[0005] To address the shortcomings of existing technologies, since places where combustible gases are used require good ventilation, strong winds in inclement weather can hinder the entry of combustible gases into the sensor, thereby reducing detection efficiency and accuracy. Furthermore, gases carry particulate matter and impurities, and if these impurities enter the sensor along with the gas, they will also cause a decrease in detection accuracy. Existing sensors do not include impurity filtering and removal functions. Therefore, this invention proposes a combustible gas explosion-proof sensor.

[0006] The technical solution adopted by this utility model to solve its technical problem is as follows: A combustible gas explosion-proof sensor of this utility model includes a sensor body, a connector fixedly connected to the bottom of the sensor body, a mounting sleeve threadedly connected to the bottom of the connector, a detection probe detachably connected to the inside of the connector via a mounting base, a first sealing ring fixedly connected between the mounting base and the connector, a fixing frame fixedly connected to the inner side of the mounting sleeve, a second sealing ring slidably connected to the top of the fixing frame, an air intake component and a transmission component respectively disposed inside the mounting sleeve, the air intake component including a fan, a fan rotatably connected to the lower inside of the mounting sleeve via a rotating shaft, a filter screen installed at the bottom of the mounting sleeve, a rotating cover rotatably connected to the bottom of the mounting sleeve, brush plates symmetrically fixedly connected to the outside of the rotating cover to cooperate with the filter screen, multiple sets of air inlets equally spaced inside the lower inside of the mounting sleeve, and a baffle slidably connected to the lower outside of the mounting sleeve.

[0007] Preferably, the transmission assembly includes a motor and a linkage unit. The motor is fixedly connected to the lower interior of the mounting sleeve via a limiting plate. The output end of the motor extends to the bottom of the limiting plate and is fixedly connected to the rotating shaft. The brush plate can be rotated via the linkage unit.

[0008] Preferably, the linkage unit includes a first gear and a second gear. One end of the rotating shaft extends to the inner side of the rotating cover and is fixedly connected to the first gear. The inner side of the rotating cover is rotatably connected to the second gear. The first gear and the second gear are meshed together. The inner wall of the rotating cover is provided with teeth. The second gear is meshed with the rotating cover through the teeth.

[0009] Preferably, the transmission assembly further includes an electric push rod, which is fixedly connected to the outer side of the mounting sleeve via a mounting block, and the output end of the electric push rod is fixedly connected to the baffle.

[0010] Preferably, an alarm light is installed on one side of the top of the sensor body.

[0011] Preferably, mounting plates are fixedly connected to the outside of the sensor body at equal intervals, and bolts are provided inside the multiple mounting plates.

[0012] Preferably, the top of the detection probe is fixedly connected with multiple insertion rods, and the mounting base has multiple insertion holes that cooperate with the insertion rods.

[0013] Preferably, a ring is fixedly connected to the outside of the detection probe, a pressure plate that cooperates with the ring is fixedly connected to the inside of the fixing frame, and ventilation openings are equidistantly provided on the upper inside of the mounting sleeve.

[0014] Preferably, a spring is provided at an equal distance between the top of the fixing frame and the second sealing ring.

[0015] 1. This utility model uses a filter screen at the bottom of the mounting sleeve to filter particulate matter and impurities in the inhaled gas, preventing these impurities from entering the mounting sleeve and connector along with the gas and affecting the detection effect. In severe weather, a fan actively draws external gas into the mounting sleeve and connector, while the output end of the electric push rod drives the baffle to rise, which expands the air intake through the air inlet. Combined with the active suction of the fan, this overcomes the difficulty of wind hindering combustible gas from entering the mounting sleeve and connector in severe weather, effectively improving the detection efficiency and accuracy of the device for combustible gases. Furthermore, during air intake, the rotating shaft drives the brush plate to rotate synchronously, repeatedly cleaning the filter screen and removing impurities attached to it, preventing blockage caused by excessive impurities and thus affecting the air intake effect. 2. This utility model allows for the disassembly of the mounting sleeve via a threaded connection between the mounting sleeve and the connector, enabling the removal and replacement of the detection probe. This avoids the problem of traditional integrated sensor bodies requiring complete replacement or return to the factory for repair after reaching their service life, which increases usage costs and reduces ease of use. After disassembling the old detection probe, the new one is inserted into the mounting base via a plug, and then the mounting sleeve is reinstalled to complete the quick replacement of the detection probe. It is convenient to use, simple to operate, and effectively saves on usage costs.

[0016] 3. After the detection probe and mounting sleeve are installed, the fixing bracket can drive the second sealing ring to press the first sealing ring, thereby achieving a seal and preventing flammable gas from entering the inner cavity of the sensor body through gaps. When sparks or overheating occur in the circuit part of the inner cavity, flammable gas may be ignited, leading to an explosion. Furthermore, after the second sealing ring presses the first sealing ring, the adaptive pressure of the spring ensures that the second sealing ring is always in close contact with the first sealing ring, preventing the first and second sealing rings from wearing and loosening after use, thus reducing the sealing performance and effectively improving the explosion-proof performance and service life of the device. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a perspective view of the present invention; Figure 2This is a bottom-view perspective view of the present invention; Figure 3 This is a cross-sectional view of the connector and the mounting sleeve in this utility model; Figure 4 For the present utility model Figure 3 Enlarged view of point A in the middle; Figure 5 For the present utility model Figure 3 Enlarged view of section B in the middle.

[0019] In the diagram: 1. Sensor body; 2. Connector; 3. Mounting sleeve; 4. Mounting base; 5. Detection probe; 6. First sealing ring; 7. Fixing bracket; 8. Second sealing ring; 9. Rotating shaft; 10. Fan; 11. Filter screen; 12. Rotating cover; 13. Brush plate; 14. Air inlet; 15. Baffle; 16. Limiting plate; 17. Motor; 18. First gear; 19. Second gear; 20. Gear teeth; 21. Electric push rod; 22. Alarm light; 23. Mounting plate; 24. Bolt; 25. Spring; 26. Ring; 27. Pressure plate. Detailed Implementation

[0020] 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.

[0021] Example 1 Please see Figure 1-5As shown, a combustible gas explosion-proof sensor includes a sensor body 1. A connector 2 is fixedly connected to the bottom of the sensor body 1. A mounting sleeve 3 is threadedly connected to the bottom of the connector 2. A detection probe 5 is detachably connected to the inside of the connector 2 via a mounting base 4. A first sealing ring 6 is fixedly connected between the mounting base 4 and the connector 2. A fixing frame 7 is fixedly connected to the inner side of the mounting sleeve 3. A second sealing ring 8 is slidably connected to the top of the fixing frame 7. An air intake component and a transmission component are respectively arranged inside the mounting sleeve 3. The air intake component includes a fan 10. The fan 10 is rotatably connected to the lower inside of the mounting sleeve 3 via a rotating shaft 9. A filter screen 11 is installed at the bottom of the mounting sleeve 3. A rotating cover 12 is rotatably connected to the bottom of the mounting sleeve 3. Brush plates 13 that cooperate with the filter screen 11 are symmetrically fixedly connected to the outside of the rotating cover 12. Multiple sets of air inlets 14 are equidistantly opened at the lower inside of the mounting sleeve 3. A baffle 15 is slidably connected to the lower exterior of the mounting sleeve 3. The transmission assembly includes a motor 17 and a linkage unit. The motor 17 is fixedly connected to the lower interior of the mounting sleeve 3 via a limiting plate 16. The output end of the motor 17 extends to the bottom of the limiting plate 16 and is fixedly connected to the rotating shaft 9. The brush plate 13 can be rotated via the linkage unit. The linkage unit includes a first gear 18 and a second gear 19. One end of the rotating shaft 9 extends to the inner side of the rotating cover 12 and is fixedly connected to the first gear 18. The second gear 19 is rotatably connected to the inner side of the rotating cover 12. The first gear 18 and the second gear 19 are meshed. The inner wall of the rotating cover 12 is provided with teeth 20. The second gear 19 is meshed with the rotating cover 12 via the teeth 20. The transmission assembly also includes an electric push rod 21. The electric push rod 21 is fixedly connected to the outer side of the mounting sleeve 3 via a mounting block. The output end of the electric push rod 21 is fixedly connected to the baffle 15.

[0022] During operation, in normal weather, air can pass through the filter 11 and enter the interior of the mounting sleeve 3 and connector 2, where it is detected by the detection probe 5. When excessive combustible gas is detected, the alarm light 22 can be activated and flash to alert personnel. In severe weather, combustible gas may be affected by wind direction and have difficulty entering the interior of the mounting sleeve 3 and connector 2, affecting detection accuracy. In this case, the motor 17 and electric push rod 21 can be activated. The motor 17 drives the rotating shaft 9 and fan 10 to rotate, causing the fan 10 to actively draw in external gas. The gas enters the mounting sleeve 3 and connector 2. Simultaneously, the output end of the electric push rod 21 drives the baffle 15 to rise, which expands the air intake through the air inlet 14. Combined with the active suction of the fan 10, this overcomes the difficulty of wind obstructing the entry of combustible gas into the mounting sleeve 3 and connector 2 in inclement weather, effectively improving the detection efficiency and accuracy of the device for combustible gas. Furthermore, the filter 11 at the bottom of the mounting sleeve 3 can filter particulate matter and impurities in the intake gas, preventing these impurities from entering the mounting sleeve 3 and connector 2 with the gas. The internal structure of the device 2 causes problems affecting the detection effect. While the rotating shaft 9 rotates, it also drives the first gear 18 at the bottom to rotate. Through the meshing relationship, the first gear 18 drives the second gear 19 and the rotating cover 12 to rotate. The rotating cover 12 drives the external brush plate 13 to rotate, repeatedly cleaning the filter screen 11 and removing the impurities attached to the filter screen 11. This avoids the problem of excessive impurities causing blockage and affecting the air intake effect. Since the diameter of the rotating cover 12 is larger than that of the first gear 18 and the second gear 19, the rotation speed of the brush plate 13 is less than that of the fan 10. Furthermore, this device can be disassembled through the threaded connection between the mounting sleeve 3 and the connector 2, and then the detection probe 5 can be pulled out and replaced. This avoids the problem that the traditional integrated sensor body 1 needs to be replaced as a whole or returned to the factory for repair after reaching its service life, which increases the cost of use and reduces the convenience of use. After the old detection probe 5 is removed, the new one is inserted into the mounting base 4 through the plug rod, and then the mounting sleeve 3 is installed again to complete the quick replacement of the detection probe 5. It is convenient to use, simple to operate, and effectively saves the cost of use.

[0023] An alarm light 22 is installed on one side of the top of the sensor body 1. Mounting plates 23 are fixedly connected to the outside of the sensor body 1 at equal intervals. Bolts 24 are installed inside the mounting plates 23. Multiple insertion rods are fixedly connected to the top of the detection probe 5. Multiple insertion holes that cooperate with the insertion rods are opened inside the mounting base 4. A ring 26 is fixedly connected to the outside of the detection probe 5. A pressure plate 27 that cooperates with the ring 26 is fixedly connected to the inside of the fixing frame 7. Ventilation openings are opened at equal intervals on the upper part of the inside of the mounting sleeve 3.

[0024] With the above technical solution, the device can be installed in any working position by using the mounting plate 23 and bolts 24, which is convenient to use. The pressure plate 27 can press the ring 26 after installation, which improves the installation stability of the detection probe 5.

[0025] Example 2 Please see Figure 5 As shown in the first embodiment, as another implementation of this utility model, a spring 25 is provided at an equal distance between the top of the fixing frame 7 and the second sealing ring 8.

[0026] During operation, after the detection probe 5 and the mounting sleeve 3 are installed, the fixing bracket 7 can drive the second sealing ring 8 to press the first sealing ring 6, thereby achieving a seal and preventing flammable gas from entering the inner cavity of the sensor body 1 through gaps. If sparks or overheating occur in the circuit part of the inner cavity, flammable gas may be ignited, leading to an explosion. After the second sealing ring 8 presses the first sealing ring 6, the adaptive pressure of the spring 25 ensures that the second sealing ring 8 is always in close contact with the first sealing ring 6, preventing the first sealing ring 6 and the second sealing ring 8 from wearing and loosening after use, thus reducing the sealing performance and effectively improving the explosion-proof performance and service life of this device.

[0027] Working principle: In normal weather, air can pass through the filter 11 and enter the interior of the mounting sleeve 3 and connector 2, where it is detected by the detection probe 5. When the level of combustible gas exceeds the limit, the alarm light 22 will be activated and flash to alert personnel. In severe weather, combustible gas may be affected by wind direction and have difficulty entering the interior of the mounting sleeve 3 and connector 2, affecting detection accuracy. In this case, the motor 17 and electric push rod 21 can be activated. The motor 17 drives the rotating shaft 9 and fan 10 to rotate, causing the fan 10 to actively draw external gas into the interior of the mounting sleeve 3 and connector 2. At the same time, the output end of the electric push rod 21 drives the baffle 15 to rise, which expands the air intake through the air inlet 14, coordinating with the active suction of the fan 10. The wind-resistant design overcomes the difficulty of wind hindering the entry of combustible gas into the mounting sleeve 3 and connector 2 during severe weather, effectively improving the detection efficiency and accuracy of the device. Furthermore, the filter 11 at the bottom of the mounting sleeve 3 filters particulate matter and impurities in the inhaled gas, preventing these impurities from entering the mounting sleeve 3 and connector 2 and affecting the detection results. Simultaneously, the rotation of the rotating shaft 9 drives the first gear 18 at the bottom to rotate, which in turn drives the second gear 19 and the rotating cover 12 to rotate. This, in turn, causes the external brush plate 13 to rotate, cleaning the filter 11. Repeated cleaning of the filter 11 ensures that the filter 11 is properly cleaned. The device removes impurities adhering to the surface, preventing blockages caused by excessive impurities that could affect air intake performance. Furthermore, the mounting sleeve 3 can be disassembled via the threaded connection between it and the connector 2, allowing for the removal and replacement of the detection probe 5. This avoids the need for complete replacement or factory repair of the traditional integrated sensor body 1 after its lifespan, which increases operating costs and reduces ease of use. After removing the old detection probe 5, the new one is inserted into the mounting base 4 via the insertion rod, and then the mounting sleeve 3 is reinstalled, completing the quick replacement of the detection probe 5. It is convenient, simple to operate, and effectively saves on operating costs. The device can be installed in any working position using the mounting plate 23 and bolts 24. The device is easy to use. The pressure plate 27 presses the ring 26 after installation, improving the stability of the detection probe 5. After the detection probe 5 and mounting sleeve 3 are installed, the fixing bracket 7 can drive the second sealing ring 8 to press the first sealing ring 6, thus achieving a seal and preventing flammable gas from entering the inner cavity of the sensor body 1 through gaps. This prevents the flammable gas from igniting and causing an explosion if sparks or overheating occur in the circuitry within the inner cavity. Furthermore, after the second sealing ring 8 presses against the first sealing ring 6, the adaptive pressure of the spring 25 ensures that the second sealing ring 8 remains tightly fitted to the first sealing ring 6, preventing wear and loosening of the first and second sealing rings over time, which could reduce the sealing performance.This effectively improves the explosion-proof performance and service life of the device.

[0028] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0029] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A combustible gas explosion-proof sensor, comprising a sensor body (1), a connector (2) fixedly connected to the bottom of the sensor body (1), an mounting sleeve (3) threadedly connected to the bottom of the connector (2), a detection probe (5) detachably connected inside the connector (2) via a mounting base (4), a first sealing ring (6) fixedly connected between the mounting base (4) and the connector (2), a fixing frame (7) fixedly connected to the inner side of the mounting sleeve (3), a second sealing ring (8) slidably connected to the top of the fixing frame (7), and an air intake component and a transmission component respectively provided inside the mounting sleeve (3); Its features are: The air intake assembly includes a fan (10). The fan (10) is rotatably connected to the lower interior of the mounting sleeve (3) via a rotating shaft (9). A filter screen (11) is installed at the bottom of the mounting sleeve (3). A rotating cover (12) is rotatably connected to the bottom of the mounting sleeve (3). A brush plate (13) that cooperates with the filter screen (11) is symmetrically fixed to the outside of the rotating cover (12). Multiple sets of air inlets (14) are equidistantly opened at the lower interior of the mounting sleeve (3). A baffle (15) is slidably connected to the lower exterior of the mounting sleeve (3).

2. The combustible gas explosion-proof sensor according to claim 1, characterized in that: The transmission assembly includes a motor (17) and a linkage unit. The motor (17) is fixedly connected to the lower interior of the mounting sleeve (3) via a limiting plate (16). The output end of the motor (17) extends to the bottom of the limiting plate (16) and is fixedly connected to the rotating shaft (9). The brush plate (13) can be rotated via the linkage unit.

3. The combustible gas explosion-proof sensor according to claim 2, characterized in that: The linkage unit includes a first gear (18) and a second gear (19). One end of the rotating shaft (9) extends to the inner side of the rotating cover (12) and is fixedly connected to the first gear (18). The inner side of the rotating cover (12) is rotatably connected to the second gear (19). The first gear (18) and the second gear (19) are meshed together. The inner wall of the rotating cover (12) is provided with teeth (20). The second gear (19) is meshed with the rotating cover (12) through the teeth (20).

4. The combustible gas explosion-proof sensor according to claim 2, characterized in that: The transmission assembly also includes an electric push rod (21), which is fixedly connected to the outer side of the mounting sleeve (3) by a mounting block, and the output end of the electric push rod (21) is fixedly connected to the baffle (15).

5. A combustible gas explosion-proof sensor according to claim 4, characterized in that: An alarm light (22) is installed on one side of the top of the sensor body (1).

6. The combustible gas explosion-proof sensor according to claim 1, characterized in that: The sensor body (1) is fixedly connected to the outside of the mounting plates (23) at equal intervals, and bolts (24) are provided inside the multiple mounting plates (23).

7. The combustible gas explosion-proof sensor according to claim 1, characterized in that: The top of the detection probe (5) is fixedly connected with multiple insertion rods, and the mounting base (4) has multiple insertion holes that cooperate with the insertion rods.

8. The combustible gas explosion-proof sensor according to claim 1, characterized in that: The detection probe (5) is fixedly connected to a ring (26) on the outside, and the fixing frame (7) is fixedly connected to a pressure plate (27) that cooperates with the ring (26) on the inside. Ventilation openings are provided at equal intervals on the upper part of the mounting sleeve (3).

9. A combustible gas explosion-proof sensor according to claim 1, characterized in that: A spring (25) is provided at an equal distance between the top of the fixing frame (7) and the second sealing ring (8).

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