A splash guard for a gas detector alarm

Abstract

This utility model discloses a splash guard for a gas detection alarm, including a protective cover with a sensing probe inside. The upper part of the protective cover is used to connect the gas detection alarm, and the lower part of the protective cover has a primary reflector and a secondary reflector. The primary reflector is located below the secondary reflector. The primary reflector is an inverted cone, and the secondary reflector is an upright cone. Both the primary and secondary reflectors include a circular surface and a side surface. The circular surfaces of the primary and secondary reflectors have the same diameter and fit together. The side surface of the primary reflector is a ground rain splash protection surface, and the side surface of the secondary reflector is an air rain splash protection surface. Its advantage is that it can effectively reduce ground rain splash while also reducing secondary rain splash caused by the protective structure itself.

Description

Technical Field

[0001] This utility model relates to the field of alarm devices, and in particular to a splash guard for a gas detection alarm device. Background Technology

[0002] In industries such as hazardous chemicals and petrochemicals, gas detectors (hereinafter referred to as "gas alarms") are key devices for monitoring the concentration of harmful or flammable gases in the environment. Their operational stability is directly related to production safety and personnel health. Currently, the fixed-point type gas alarms widely used in the industry are typically installed with the probe facing downwards at a height of 300mm to 600mm above the ground. Their core detection components are surrounded by a protective cover with multiple ventilation holes. The initial intention of this structural design was to isolate external debris while ensuring that the gas to be measured can diffuse into the probe through the ventilation holes, undergoing a catalytic or electrochemical reaction with the sensor, thereby achieving accurate detection of gas concentration.

[0003] However, the above structure has significant drawbacks in practical applications: due to the low installation height of the gas detector (generally 300mm to 600mm), when rain falls, raindrops carry ground dust and bounce off, directly splashing onto the protective cover surface. While the protective cover can isolate large particles of debris, it is ineffective at blocking dust carried by the bouncing rainwater. Dust gradually accumulates on the surface of the isolation components and may even seep into the protective cover, causing blockage of the vents and obstruction of the gas diffusion channel. Over time, the contact efficiency between the sensor and the measured gas decreases significantly, ultimately resulting in reduced detection sensitivity and response delay of the gas detector, and in severe cases, even complete failure, posing a significant safety hazard to industrial production.

[0004] To alleviate this problem, existing technologies have attempted to add a cover plate under the protective shield to block direct splashing of rainwater from the ground. However, practice has shown that while the cover plate can reduce the rebound of rainwater from the ground, it becomes a new carrier of water accumulation: rainwater on the cover plate will splash again under the impact of wind or subsequent rainfall, and the splashing raindrops will still carry dust and adhere to the surface of the protective shield, so the clogging problem is not fundamentally solved.

[0005] Furthermore, the complex meteorological conditions at industrial sites exacerbate this problem. For example, in a gale-force wind (approximately 24.5 m / s), raindrops with a diameter of 0.5 mm to 4.5 mm impact the ground with high kinetic energy. Larger raindrops, around 4 mm in diameter, due to their greater mass, can bounce back to the installation height of the weather forecast instrument, and the dust they carry is more likely to adhere to the protective cover. Therefore, effectively reducing ground splashing while preventing secondary splashing caused by the protective structure itself has become a key technical challenge for ensuring the long-term stable operation of the weather forecast instrument, necessitating the development of a novel protective structure to address these issues. Utility Model Content

[0006] The technical problem to be solved by this utility model is to provide a splash guard for a gas detection alarm, which can effectively reduce rainwater splashing on the ground while also reducing secondary rainwater splashing caused by the protective structure itself.

[0007] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: a splash guard for a gas detection alarm, including a protective cover, a sensing probe is installed inside the protective cover, and the upper part of the protective cover is used to connect the gas detection alarm. The feature is that a primary reflector and a secondary reflector are arranged below the protective cover. The primary reflector is located below the secondary reflector. The primary reflector is an inverted cone and the secondary reflector is an upright cone. Both the primary reflector and the secondary reflector include a circular surface and a side surface. The circular surfaces of the primary reflector and the secondary reflector have the same diameter and fit together. The side surface of the primary reflector is a ground rain splash guard, and the side surface of the secondary reflector is an air rain splash guard.

[0008] A further preferred embodiment of this invention is that the top of the secondary reflector is connected to the lower surface of the protective cover.

[0009] A further preferred embodiment of this utility model is that the angle between the aerial rain splash surface and the horizontal plane is 60-80 degrees, and the angle between the ground rain splash surface and the horizontal plane is 10-30 degrees.

[0010] A further preferred embodiment of this utility model is that the angle between the aerial rain splash surface and the horizontal plane is 70 degrees, and the angle between the ground rain splash surface and the horizontal plane is 20 degrees.

[0011] A further preferred embodiment of this utility model is that the diameters of the circular surfaces of the primary reflector and the secondary reflector are the same as the diameter of the protective cover.

[0012] A further preferred embodiment of this utility model is that the secondary reflector is installed below the protective cover via a threaded structure or a snap-fit ​​structure.

[0013] A further preferred embodiment of this utility model is as follows: the protective cover has a diameter of 40mm, a circular surface of 40mm, a main reflector height of 10mm, and a secondary reflector height of 49.44mm.

[0014] A further preferred embodiment of this invention is that the surfaces of the primary reflector and the secondary reflector are coated with Teflon for hydrophobicity.

[0015] A further preferred embodiment of this utility model is that the primary reflector and the secondary reflector are hollow plastic structures.

[0016] A further preferred embodiment of this utility model is that the sample flow channel is arranged vertically.

[0017] This invention features a primary reflector and a secondary reflector positioned below the protective cover. The primary reflector is an inverted cone, and the secondary reflector is an upright cone. Both reflectors have the same diameter and fit together. This design allows the primary reflector to effectively block and reflect rainwater from the ground, while the secondary reflector can effectively handle rainwater from the air. This clear division of labor reduces the amount of rainwater and dust splashed into the protective cover, prevents vent blockage, and ensures the stability and durability of the sensor's detection function. This invention solves the problem of existing protective covers failing due to rainwater splashes. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] Figure 2 This is a schematic diagram illustrating how the present invention prevents rainwater splashing onto the bottom surface;

[0020] Figure 3 This is a schematic diagram of a gas detection alarm device. Detailed Implementation

[0021] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0022] like Figures 1-3 As shown, a splash guard for a gas detector alarm includes a protective cover 1. A sensor probe is installed inside the protective cover 1. The upper part of the protective cover 1 is used to connect to a gas detector alarm 3. A primary reflector 4 and a secondary reflector 5 are arranged below the protective cover 1. The primary reflector 4 is positioned below the secondary reflector 5. The primary reflector 4 is an inverted cone shape, and the secondary reflector 5 is an upright cone shape. The conical structure of the two primary reflectors enhances the safety of the component formed by the combination of the two reflectors and reduces the sharp edges of the component. Both the primary reflector 4 and the secondary reflector 5 include a circular surface 6 and a side surface 7. The circular surfaces 6 of the primary reflector 4 and the secondary reflector 5 have the same diameter and fit together. The side surface 7 of the primary reflector 4 is a ground rain splash protection surface 8, and the side surface 7 of the secondary reflector 5 is an air rain splash protection surface 9. By setting a primary reflector 4 and a secondary reflector 5 below the protective cover 1, with the primary reflector 4 being an inverted cone and the secondary reflector 5 being an upright cone, and both having the same diameter on their circular surfaces 6 and fitting together, the side 7 of the primary reflector 4 can specifically block and reflect rainwater from the ground, while the side 7 of the secondary reflector 5 can effectively deal with rainwater from the air. This clear division of labor reduces the amount of rainwater and dust splashed into the protective cover 1, avoids clogging of the ventilation holes, ensures the stability and durability of the detection function of the sensor probe 2, and solves the problem that existing protective covers are prone to detection failure due to rainwater splashing.

[0023] The top of the secondary reflector 5 is connected to the lower surface of the protective cover 1. Connecting the top of the secondary reflector 5 to the lower surface of the protective cover 1 makes the secondary reflector 5 and the protective cover 1 form a stable integral structure, preventing gaps between the two from allowing rainwater to seep in. At the same time, it enhances the overall rigidity of the splash cover, making it less prone to relative displacement under the action of external forces such as wind. This ensures that the secondary reflector 5 has a stable and reliable effect in blocking and reflecting rainwater from the air, further improving the tightness of splash protection.

[0024] The angle between the aerial rain splash surface 9 and the horizontal plane is 60-80 degrees, and the angle between the ground rain splash surface 8 and the horizontal plane is 10-30 degrees. Setting the angle between the aerial rain splash surface 9 and the horizontal plane to 60-80 degrees and the angle between the ground rain splash surface 8 and the horizontal plane to 10-30 degrees allows for adaptation to the movement trajectory of rainwater under different wind and rainfall conditions. Under these angles, aerial rainwater can be effectively guided away from the protective cover 1, and ground-reflected rainwater can also be reasonably reflected, avoiding direct impact on the protective cover 1. This significantly reduces the probability of rainwater splashing onto the protective cover 1, improving the adaptability and effectiveness of the splash protection.

[0025] like Figure 1 As shown, the angle between the aerial rain splash surface 9 and the horizontal plane is 70 degrees, and the angle between the ground rain splash surface 8 and the horizontal plane is 20 degrees.

[0026] Horizontal velocity: entirely determined by wind speed, using the lower limit of 24.5 m / s for a level 10 wind. Vertical velocity: the final gravitational velocity of a large raindrop (4 mm in diameter) is approximately 9 m / s (meteorologically measured data). Angle calculation formula:

[0027]

[0028] Based on the above calculations, during a level 10 gale, the angle between raindrops and the ground is 20 degrees. Therefore, when the angle between the aerial rain splash surface 9 and the horizontal plane is 70 degrees, rainwater falls vertically onto the aerial rain splash surface 9. At this angle, the probability of rainwater splashing and falling into the protective cover 1 is lowest due to the combined effect of gravity. During winds below level 10, the angle between the rainwater and the rain splash surface is less than 90 degrees, and the rainwater splashes to both sides of the secondary reflector 5, preventing most of the rainwater from falling into the protective cover 1.

[0029] The diameters of the circular surfaces 6 of the primary reflector 4 and the secondary reflector 5 are the same as the diameter of the protective shield 1. This allows the reflectors to fully cover the area below the protective shield 1, avoiding blind spots due to size mismatch. It ensures that rainwater splashing from all directions can be blocked by the reflectors, providing comprehensive protection for the protective shield 1 without any blind spots. This further enhances the overall splash protection and reduces the possibility of rainwater entering the protective shield 1 through edge gaps.

[0030] The secondary reflector 5 is installed below the protective cover 1 via a threaded or snap-fit ​​structure. This detachable connection method facilitates the installation, removal, and maintenance of the splash guard. When the reflector surface is worn or requires cleaning, it can be easily removed for processing without the need for complete replacement, reducing maintenance costs and operational difficulty. It also allows for the replacement of reflectors of different specifications according to different usage scenarios, improving the practicality and flexibility of the equipment.

[0031] The protective cover 1 has a diameter of 40mm, the circular surface 6 has a diameter of 40mm, the main reflector 4 has a height of 10mm, and the secondary reflector 5 has a height of 49.44mm. It is perfectly compatible with the corresponding gas detector alarm 3, ensuring that the reflectors form an effective protective range in space. The height of the main reflector 4 is sufficient to cover the main splash area of ​​rainwater from the ground, while the height of the secondary reflector 5 effectively blocks rainwater from the air. The reasonable size proportions ensure reflective effect while avoiding structural redundancy, making the splash cover suitable even in scenarios with limited installation space.

[0032] The surfaces of the primary reflector 4 and the secondary reflector 5 are coated with Teflon for hydrophobicity. Utilizing the hydrophobic properties of Teflon reduces the adhesion and retention of rainwater on the reflector surfaces. Rainwater can quickly slide off the reflector surfaces, preventing secondary splashing caused by rainwater accumulation. Simultaneously, it reduces dust adsorption on the reflector surfaces, lowering the possibility of dust accumulation affecting the reflective performance and extending the cleaning cycle and lifespan of the reflectors.

[0033] The main reflector 4 and the secondary reflector 5 are hollow plastic structures. While ensuring sufficient structural strength to withstand rain and wind, this significantly reduces the overall weight of the splash guard, lowering the load-bearing requirements on the gas meter's installation structure and facilitating installation and fixation. The plastic material has excellent corrosion resistance, enabling it to adapt to harsh environments such as hazardous chemicals and petrochemical plants. Furthermore, the hollow structure saves materials, reducing manufacturing costs, thus combining practicality and economy.

[0034] The above provides a detailed description of the splash guard for a gas detector alarm provided by this utility model. Specific examples have been used to illustrate the principle and implementation of this utility model. The descriptions of the embodiments above are only for the purpose of helping to understand this utility model and its core ideas. It should be noted that those skilled in the art can make various improvements and modifications to this utility model without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. A splash-proof cover for a gas detection alarm, comprising a protective cover, an inductive probe being arranged in the protective cover, and an upper portion of the protective cover being used for connecting a gas detection alarm, characterized in that The protective cover has a main reflector and a secondary reflector below it. The main reflector is located below the secondary reflector. The main reflector is an inverted cone and the secondary reflector is an upright cone. Both the main reflector and the secondary reflector include a circular surface and a side surface. The circular surfaces of the main reflector and the secondary reflector have the same diameter and fit together. The side surface of the main reflector is a ground-level rain splash protection surface, and the side surface of the secondary reflector is an air-level rain splash protection surface.

2. The splash guard of claim 1, wherein The top of the secondary reflector is connected to the lower surface of the protective cover.

3. The splash guard of claim 1, wherein The angle between the aerial rain splash surface and the horizontal plane is 60-80 degrees, and the angle between the ground rain splash surface and the horizontal plane is 10-30 degrees.

4. The splash guard of claim 1, wherein The angle between the aerial rain splash surface and the horizontal plane is 70 degrees, and the angle between the ground rain splash surface and the horizontal plane is 20 degrees.

5. The splash guard of claim 1, wherein The diameters of the circular surfaces of the primary reflector and secondary reflector are the same as the diameter of the protective shield.

6. The splash guard of claim 1, wherein The secondary reflector is installed below the protective cover via a threaded structure or a snap-fit ​​structure.

7. The splash guard of claim 1, wherein The protective cover has a diameter of 40cm, a circular surface of 40cm, a main reflector height of 10cm, and a secondary reflector height of 49.44cm.

8. The splash guard of claim 1, wherein The surfaces of the primary and secondary reflectors are coated with Teflon for hydrophobicity.

9. A splash guard for a gas detector alarm according to claim 1, characterized in that... The primary reflector and secondary reflector are hollow plastic structures.

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