Moisture-proof and dust-proof packaging structure of monitoring sensor

Abstract

The utility model discloses a monitoring sensor's dampproof dustproof packaging structure, including sensor body, the inside of sensor body is the closed cavity, the closed cavity is used for accommodating sensor core element, still includes elastic balance subassembly, the elastic balance subassembly includes elastic adapter and support frame, the elastic adapter is the hollow capsule structure with continuous curved surface deformation ability, the support frame is annular frame structure, the open end of elastic adapter is connected with the circumferential inner wall of support frame through sealing fixed connection, and the top outer wall of sensor body is equipped with mounting hole. The utility model discloses monitoring sensor's dampproof dustproof packaging structure can improve its anti -fatigue performance under high -pressure environment, prolongs the sealed life significantly, and the effect of improving dampproof dustproof performance is improved.

Description

Technical Field

[0001] This utility model relates to the field of sensor technology, and in particular to a moisture-proof and dust-proof packaging structure for monitoring sensors. Background Technology

[0002] The main purpose of encapsulating monitoring sensors is to protect the internal precision components from external mechanical damage, chemical corrosion, and other influences, ensuring stable operation and measurement accuracy. Moisture and dust protection are key functions of encapsulation. Moisture can cause components to short-circuit and rust, while dust can interfere with signal acquisition and wear down mechanical parts. Encapsulation effectively blocks moisture and dust from entering by creating an isolation barrier, creating a safe environment for the sensor and extending its service life.

[0003] In temperature-changing environments, the air pressure inside the sealed cavity of the monitoring sensor will change significantly due to the thermal expansion and contraction of the gas. Traditional rigid packaging cannot adapt to the changes in air pressure, which may cause the sealing interface to be subjected to alternating stress, accelerating rubber aging or metal fatigue, and ultimately leading to leakage and seal failure. For example, take the wind speed sensor of an outdoor weather monitoring station as an example. Its sealed cavity uses traditional rigid metal encapsulation. Under the temperature changes between day and night, the air pressure inside the cavity fluctuates due to the thermal expansion and contraction of the gas. The rigid encapsulation cannot deform, causing the rubber sealing ring to be repeatedly subjected to alternating compression and tension stress. In a short period of time, the rubber ages and cracks, and moisture intrusion causes short circuits. At the same time, the metal shell develops micro-cracks due to stress concentration, ultimately leading to cavity leakage and sensor failure. Utility Model Content

[0004] This utility model discloses a moisture-proof and dust-proof packaging structure for monitoring sensors, aiming to solve the technical problem that in temperature-changing environments, the air pressure in the sealed cavity of the monitoring sensor will change significantly due to the thermal expansion and contraction of the gas. Traditional rigid packaging cannot adapt to the changes in air pressure, which may cause the sealing interface to be subjected to alternating stress, accelerate rubber aging or metal fatigue, and ultimately lead to leakage and sealing failure.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A moisture-proof and dust-proof packaging structure for a monitoring sensor includes a sensor body, the interior of which is a sealed cavity for housing the core components of the sensor. It also includes an elastic balancing assembly, comprising an elastic adapter and a support frame. The elastic adapter is a hollow, sac-like structure with continuous curved surface deformation capability. The support frame is an annular frame structure. The open end of the elastic adapter is sealed and fixedly connected to the inner circumference of the support frame. A mounting hole is provided on the top outer wall of the sensor body, and the bottom outer wall of the support frame is sealed and fixedly connected to the mounting hole. The deformation cavity of the elastic adapter communicates with the sealed cavity.

[0006] By adopting the above technical solution, its fatigue resistance under high pressure environment can be improved, its sealing life can be significantly extended, and its moisture-proof and dust-proof performance can be enhanced. Specifically, when the air pressure in the sealed cavity increases due to temperature changes, the continuous curved surface of the elastic adapter expands outward under pressure, increasing the volume of the deformation cavity to reduce the air pressure in the sealed cavity. When the air pressure in the sealed cavity decreases, the continuous curved surface of the elastic adapter contracts inward, reducing the volume of the deformation cavity to increase the air pressure in the sealed cavity, thereby achieving automatic air pressure balance, air pressure buffering, and enhanced sealing.

[0007] As a further embodiment of this utility model: the curved transition area of ​​the elastic adapter adopts a rounded corner design, and the curved deformation area of ​​the elastic adapter is provided with a number of reinforcing ribs, the reinforcing ribs are strip-shaped protrusions, and the number of reinforcing ribs are evenly distributed along the axial direction of the elastic adapter.

[0008] By adopting the above technical solution, this configuration facilitates the improvement of the fatigue resistance of the elastic adapter under high pressure environment, significantly improves the axial bending stiffness of the elastic adapter, and prevents unexpected bending or twisting during deformation.

[0009] As a further embodiment of this utility model: the outer circumference of the sensor body is provided with multiple drainage channels, the drainage outlet of the drainage channel is located at the lowest point of the bottom outer wall of the sensor body, and the bottom outer wall of the sensor body is provided with a guide plate.

[0010] By adopting the above technical solution, when water droplets condense on the surface of the sensor body due to temperature changes (such as when the ambient temperature is lower than the dew point temperature), the water droplets will flow downward along the surface and be discharged due to gravity.

[0011] In summary, this application includes at least one of the following beneficial technical effects: 1. By expanding and contracting the elastic adapter, the internal volume is dynamically changed, thereby efficiently balancing the internal and external pressure difference caused by temperature changes. Furthermore, the elastic balancing component is sealed and fixedly connected to the sensor body, keeping the entire system completely airtight. This is different from waterproof and breathable valves, which require millions of micropores to balance pressure and always have channels for gas exchange. This solution can completely block the intrusion of external pollutants such as water vapor, dust, and salt spray, greatly improving the sealing and protection.

[0012] 2. Multiple drainage channels are designed to guide condensate on the sensor surface to the lowest point for discharge, preventing water from accumulating at the top or interface, avoiding internal seepage or corrosion, and extending the overall sealing life of the sensor.

[0013] Other features and advantages of this utility model will be disclosed in detail in the following specific embodiments and accompanying drawings. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of the moisture-proof and dust-proof packaging structure of the monitoring sensor proposed in this utility model.

[0015] Figure 2 This is a schematic diagram of the elastic balance component structure of the moisture-proof and dust-proof packaging structure of the monitoring sensor proposed in this utility model.

[0016] Figure 3 This is a schematic diagram of the support frame structure of the moisture-proof and dust-proof packaging structure of the monitoring sensor proposed in this utility model.

[0017] Figure 4 This is a schematic diagram of the top structure of the sensor body, which is a moisture-proof and dust-proof packaging structure for the monitoring sensor proposed in this utility model.

[0018] In the attached diagram: 1. Sensor body; 2. Support frame; 3. Elastic adapter; 4. Snap-fit ​​flange; 5. Reinforcing rib; 6. Guide plate; 7. Drainage channel; 8. Annular flange; 9. Positioning boss; 10. Annular groove; 11. Mounting hole; 12. Annular recess. Detailed Implementation

[0019] 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.

[0020] Reference Figure 1 and Figure 2 The moisture-proof and dust-proof packaging structure of the monitoring sensor includes a sensor body 1, the interior of which is a sealed cavity for accommodating the core components of the sensor. It also includes an elastic balancing component, which includes an elastic adapter 3 and a support frame 2. The elastic adapter 3 is a hollow capsule structure with continuous curved surface deformation capability. The support frame 2 is an annular frame structure. The open end of the elastic adapter 3 is sealed and fixedly connected to the inner circumference of the support frame 2. The top outer wall of the sensor body 1 has a mounting hole 11. The bottom outer wall of the support frame 2 is sealed and fixedly connected to the mounting hole 11. The deformation cavity of the elastic adapter 3 is connected to the sealed cavity.

[0021] It should be noted that the material of the elastic adapter 3 can be weather-resistant rubber or metal composite material.

[0022] It should be noted that the deformation cavity of the elastic adapter 3 is filled with inert gas, which is used to slow down the oxidation reaction rate of the elastic adapter 3 and improve its deformation response speed.

[0023] Among them, the curved transition area of ​​the elastic adapter 3 adopts a rounded corner design, and the curved deformation area of ​​the elastic adapter 3 is provided with several reinforcing ribs 5. The reinforcing ribs 5 are strip-shaped protrusions, and the several reinforcing ribs 5 are evenly distributed along the axial direction of the elastic adapter 3. This setting helps to improve the fatigue resistance of the elastic adapter 3 under high pressure environment, significantly improves the axial bending stiffness of the elastic adapter 3, and prevents unexpected bending or twisting during the deformation process.

[0024] The deformation direction of the curved surface of the elastic adapter 3 is parallel to the axis of the sensor body 1.

[0025] Specifically, when the air pressure inside the sealed cavity increases due to temperature changes, the continuous curved surface of the elastic adapter 3 expands outward under pressure, increasing the volume of the deformable cavity to reduce the air pressure inside the sealed cavity. When the air pressure inside the sealed cavity decreases, the continuous curved surface of the elastic adapter 3 contracts inward, reducing the volume of the deformable cavity to increase the air pressure inside the sealed cavity. Compared with the traditional rubber O-ring, this structure can improve its fatigue resistance under high pressure, significantly extend the sealing life, and improve moisture and dust resistance.

[0026] Reference Figure 1 and Figure 3 In a preferred embodiment, the outer circumferential wall of the support frame 2 is provided with an annular flange 8. The annular flange 8 and the top outer wall of the sensor body 1 are laser welded to form an integrated sealing structure. The annular stiffness of the flange can resist the deformation caused by external pressure and prevent the sensor body 1 from separating from the support frame 2.

[0027] It should be noted that the inner circumference of the support frame 2 is provided with an annular groove 10, and the opening end of the elastic adapter 3 is provided with a snap-fit ​​flange 4 that matches the annular groove 10. The snap-fit ​​flange 4 is embedded in the inner wall of the annular groove 10, and the snap-fit ​​flange 4 forms an irremovable connection with the rigid support frame 2 through a high-temperature vulcanization process.

[0028] Reference Figure 1 and Figure 4 In a preferred embodiment, the top outer wall of the sensor body 1 is provided with an annular recess 12, and the bottom outer wall of the support frame 2 is provided with a positioning boss 9 that matches the annular recess 12. The positioning boss 9 is embedded in the annular recess 12. During the process of embedding the positioning boss 9 into the annular recess 12, the gap can be filled with structural adhesive to enhance the sealing performance.

[0029] Reference Figure 1 and Figure 4In a preferred embodiment, the outer circumferential wall of the sensor body 1 is provided with a plurality of drainage channels 7. The drainage outlet of the drainage channel 7 is located at the lowest point of the bottom outer wall of the sensor body 1. The bottom outer wall of the sensor body 1 is provided with a guide plate 6. When water droplets condense on the surface of the sensor body 1 due to temperature changes, such as when the ambient temperature is lower than the dew point temperature, the water droplets will flow downward along the surface and be discharged due to gravity.

[0030] Working principle: During use, when the air pressure inside the sealed cavity increases due to temperature changes, the continuous curved surface of the elastic adapter 3 expands outward under pressure, increasing the volume of the deformable cavity to reduce the air pressure inside the sealed cavity. When the air pressure inside the sealed cavity decreases, the continuous curved surface of the elastic adapter 3 contracts inward, reducing the volume of the deformable cavity to increase the air pressure inside the sealed cavity. Compared with the traditional rubber O-ring, this structure can improve its fatigue resistance under high pressure environment, significantly extend the sealing life, and improve moisture and dust prevention performance.

[0031] The above description is merely a preferred embodiment of this utility model, but the protection scope of this utility model is not limited thereto. The substitutions may be replacements of some structures, devices, or method steps, or they may be complete technical solutions. Equivalent substitutions or modifications made based on the technical solution and inventive concept of this utility model should all be covered within the protection scope of this utility model.

Claims

1. A moisture-proof and dust-proof packaging structure for a monitoring sensor, comprising a sensor body (1), characterized in that, The sensor body (1) has a sealed cavity inside, which is used to accommodate the core components of the sensor and also includes an elastic balancing component. The elastic balancing component includes an elastic adapter (3) and a support frame (2). The elastic adapter (3) is a hollow capsule structure with continuous curved surface deformation capability. The support frame (2) is an annular frame structure. The open end of the elastic adapter (3) is sealed and fixedly connected to the inner circumference of the support frame (2). The top outer wall of the sensor body (1) is provided with a mounting hole (11). The bottom outer wall of the support frame (2) is sealed and fixedly connected to the mounting hole (11). The deformation cavity of the elastic adapter (3) is connected to the sealed cavity.

2. The moisture-proof and dust-proof packaging structure of the monitoring sensor according to claim 1, characterized in that, The curved transition area of ​​the elastic adapter (3) adopts a rounded corner design, and the curved deformation area of ​​the elastic adapter (3) is provided with several reinforcing ribs (5). The reinforcing ribs (5) are strip-shaped protrusions, and the several reinforcing ribs (5) are evenly distributed along the axial direction of the elastic adapter (3).

3. The moisture-proof and dust-proof packaging structure of the monitoring sensor according to claim 2, characterized in that, The deformation direction of the elastic adapter (3) is parallel to the axial direction of the sensor body (1).

4. The moisture-proof and dust-proof packaging structure of the monitoring sensor according to claim 1, characterized in that, The outer circumferential wall of the support frame (2) is provided with an annular flange (8), and the annular flange (8) and the top outer wall of the sensor body (1) are laser welded to form an integrated sealed structure.

5. The moisture-proof and dust-proof packaging structure of the monitoring sensor according to claim 4, characterized in that, The inner circumferential wall of the support frame (2) is provided with an annular groove (10), and the opening end of the elastic adapter (3) is provided with a snap-fit ​​flange (4) that matches the annular groove (10). The snap-fit ​​flange (4) is embedded in the inner wall of the annular groove (10).

6. The moisture-proof and dust-proof packaging structure of the monitoring sensor according to claim 1, characterized in that, The sensor body (1) has an annular recess (12) on its top outer wall, and the support frame (2) has a positioning boss (9) that matches the annular recess (12) on its bottom outer wall. The positioning boss (9) is embedded in the annular recess (12).

7. The moisture-proof and dust-proof packaging structure of the monitoring sensor according to claim 6, characterized in that, The outer circumferential wall of the sensor body (1) is provided with multiple drainage channels (7), the drainage outlet of the drainage channel (7) is located at the lowest point of the bottom outer wall of the sensor body (1), and the bottom outer wall of the sensor body (1) is provided with a guide plate (6).

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