Explosion-proof personal sound exposure meter

Abstract

The utility model discloses a kind of anti-explosion personal sound exposure meter, it is related to anti-explosion personal sound exposure meter technical field, comprising: personal sound exposure meter body, the inner wall of personal sound exposure meter body is fixedly installed with core heating chip, the inner wall of personal sound exposure meter body is fixedly installed with L-shaped support below core heating chip, L-shaped support is provided with heat dissipation mechanism, heat dissipation mechanism includes: heat-conducting block, the top surface of L-shaped support is provided with heat-conducting block, heat-conducting block is provided with heat-conducting silicone grease between core heating chip, by being provided with split heat dissipation mechanism, heat-conducting block, aluminum nitride ceramic sheet and radiating fin are mutually matched, realize the high efficiency heat dissipation inside the explosion-proof shell of complete sealing, both ensure the explosion-proof safety of equipment, effectively reduce the working temperature of core chip, improve the measurement accuracy and equipment service life.

Description

Technical Field

[0001] This utility model relates to the technical field of explosion-proof personal sound exposure meter, specifically an explosion-proof personal sound exposure meter. Background Technology

[0002] An explosion-proof personal sound exposure meter is a type of sound level meter. It is a device that can be used to measure environmental, industrial and other noise. It is mainly used for labor protection, industrial hygiene and other purposes to measure and evaluate the impact of noise on workers. It can also be used to measure industrial noise and environmental noise from various machines, vehicles, ships, electrical appliances and other sources.

[0003] A search revealed a Chinese patent with publication number CN222211953U, which discloses an explosion-proof personal sound exposure meter. The meter includes a body connected to a microphone via a sound transmission cable. A storage mechanism is located on the back of the meter body, comprising a protective sleeve and a mounting groove. The protective sleeve is rotatably mounted within the mounting groove. A winding mechanism is fixed inside the protective sleeve, which also includes a cable-pulling mechanism and a cable-wiping mechanism. This invention utilizes a storage mechanism to retract the sound transmission cable, making the explosion-proof personal sound exposure meter more portable, space-saving, and easy to store and manage. It allows for quick retrieval during use, improving efficiency. The cable-wiping mechanism removes dust from the surface of the sound transmission cable while it is being wound and stored, maintaining its cleanliness.

[0004] However, existing explosion-proof personal sound exposure meters have significant deficiencies in heat dissipation. Because explosion-proof equipment requires a completely sealed casing to meet explosion-proof requirements, the heat generated by the internal core heating chip cannot be effectively dissipated. Current technologies cannot achieve effective heat dissipation while ensuring explosion-proof safety, leading to a continuous increase in the internal temperature of the device. This severely affects the operational stability of the core chip, reduces measurement accuracy, shortens the device's lifespan, and may even cause equipment failure due to overheating.

[0005] Therefore, based on the above search and combined with existing technology, an explosion-proof personal sound exposure meter is proposed to solve the above problems. Utility Model Content

[0006] The purpose of this invention is to provide an explosion-proof personal sound exposure meter to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] An explosion-proof personal sound exposure meter includes: a personal sound exposure meter body, a core heating chip fixedly installed on the inner wall of the personal sound exposure meter body, an L-shaped bracket fixedly installed on the inner wall of the personal sound exposure meter body below the core heating chip, a heat dissipation mechanism provided on the L-shaped bracket, the heat dissipation mechanism including: a heat-conducting block, the heat-conducting block being disposed on the top surface of the L-shaped bracket, and thermal conductive grease being disposed between the heat-conducting block and the core heating chip.

[0009] Preferably, the heat dissipation mechanism further includes: a limiting rod, the limiting rod being fixedly installed on the side wall of the L-shaped bracket facing the heat-conducting block, a sliding block being slidably installed on the outer surface of the limiting rod, a pressure plate being fixedly installed on the side wall of the sliding block facing the heat-conducting block, and a compression spring being sleeved on the outer surface of the limiting rod, one end of the compression spring being connected to the side wall of the sliding block, and the other end being connected to the side wall of the L-shaped bracket.

[0010] Preferably, the heat dissipation mechanism further includes: heat dissipation fins, which are mounted on the right side wall of the personal sound exposure meter body via a mounting assembly. The right side wall of the personal sound exposure meter body has a square window, and an aluminum nitride ceramic sheet is welded into the square window.

[0011] Preferably, the mounting components include: a U-shaped bracket, which is fixedly mounted on the right side wall of the personal sound exposure meter body, and slots are provided on adjacent surfaces of the U-shaped bracket.

[0012] Preferably, the mounting component includes: a locking block, wherein two locking blocks are provided and are respectively fixedly installed on the front and rear side walls of the heat sink fins, the locking blocks and the locking slots cooperate with each other, and multiple magnets are embedded on the surface of the U-shaped bracket facing the bottom surface of the heat sink fins.

[0013] Preferably, the bottom surface of the heat dissipation fins is made of a material that can be attracted by a magnet, and the bottom surface of the aluminum nitride ceramic sheet is attached to the top surface of the heat-conducting block.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] 1. By setting up a split heat dissipation mechanism, the heat conduction block, aluminum nitride ceramic plate and heat dissipation fins work together to achieve efficient heat dissipation inside the completely sealed explosion-proof shell. This not only ensures the explosion-proof safety of the equipment, but also effectively reduces the operating temperature of the core chip, improves measurement accuracy and equipment lifespan.

[0016] 2. By setting up a spring clamping mechanism and a magnetic snap-fit ​​mounting assembly, the clamping spring, sliding block, snap-fit ​​block and magnet work together to ensure a constant clamping force between the heat-conducting block and the chip, as well as the quick installation and removal of the heat dissipation fins. This ensures the stability of heat conduction and facilitates the maintenance and upkeep of the equipment. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the left side structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the right side of the present invention;

[0019] Figure 3 This is a schematic diagram of the disassembled structure of the aluminum nitride ceramic sheet and the square window of this utility model;

[0020] Figure 4 This is a schematic diagram of the internal structure of the personal sound exposure meter body of this utility model;

[0021] Figure 5 This utility model Figure 2 Enlarged structural diagram at point A in the middle;

[0022] Figure 6 This utility model Figure 4 Enlarged structural diagram at point B.

[0023] In the diagram: 1. Personal voice exposure meter body; 2. Core heating chip; 3. L-shaped bracket; 4. Heat-conducting block; 5. Thermal grease; 6. Limiting rod; 7. Sliding block; 8. Pressure plate; 9. Compression spring; 10. U-shaped bracket; 11. Square window; 12. Aluminum nitride ceramic sheet; 13. Heat dissipation fins; 14. Locking block; 15. Locking slot; 16. Magnet. Detailed Implementation

[0024] 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.

[0025] In one typical embodiment of this application, please refer to Figures 1-6 As shown, an explosion-proof personal sound exposure meter includes a personal sound exposure meter body 1, which is made of explosion-proof metal material and meets the explosion-proof level requirements. A core heating chip 2, which is the main processor chip of the device, is fixedly installed on the inner wall of the personal sound exposure meter body 1 by screws.

[0026] An L-shaped bracket 3 is fixedly installed on the inner wall of the personal sound exposure meter body 1, below the core heating chip 2. The L-shaped bracket 3 is fixed to the inner wall of the personal sound exposure meter body 1 by welding. A heat dissipation mechanism is provided on the L-shaped bracket 3, which includes a heat-conducting block 4 made of T2 pure copper material, and is located on the top surface of the L-shaped bracket 3. Thermal grease 5 is applied between the heat-conducting block 4 and the core heating chip 2. The thermal grease 5 has a thickness of 0.1 mm and a thermal conductivity of 3.5 W / m·K.

[0027] The heat dissipation mechanism also includes a limiting rod 6, which is fixedly installed on the side wall of the L-shaped bracket 3 facing the heat-conducting block 4 via a threaded connection. A sliding block 7 is slidably installed on the outer surface of the limiting rod 6, and a pressure plate 8 is fixedly installed on the side wall of the sliding block 7 facing the heat-conducting block 4 via screws. A compression spring 9 is sleeved on the outer surface of the limiting rod 6. The compression spring 9 is made of 304 stainless steel and has a spring constant of 5N / mm. One end of the compression spring 9 is connected to the side wall of the sliding block 7, and the other end is connected to the side wall of the L-shaped bracket 3, providing a constant pressure of 50±5N to ensure that the heat-conducting block 4 and the core heat-generating chip 2 always maintain close contact.

[0028] The heat dissipation mechanism also includes heat dissipation fins 13, which are mounted on the right side wall of the personal sound exposure meter body 1 via a mounting assembly. The heat dissipation fins 13 are manufactured from 6063 aluminum alloy through extrusion molding and have multiple fins. A square window 11 is provided on the right side wall of the personal sound exposure meter body 1. An aluminum nitride ceramic sheet 12 is sealed and welded into the square window 11 using laser welding. The aluminum nitride ceramic sheet 12 has a thermal conductivity of 180 W / m·K and a volume resistivity greater than 10 Ω·m. 14 Ω·cm. The bottom surface of the aluminum nitride ceramic plate 12 is in close contact with the top surface of the heat-conducting block 4.

[0029] The mounting assembly includes a U-shaped bracket 10, which is welded and fixed to the right side wall of the personal acoustic exposure meter body 1. Slots 15 are provided on adjacent surfaces of the U-shaped bracket 10. The mounting assembly also includes two locking blocks 14, which are respectively fixed to the front and rear side walls of the heat sink fins 13 by screws. The locking blocks 14 and the slots 15 cooperate to achieve quick installation and removal of the heat sink fins 13. Multiple magnets 16 are embedded on the surface of the U-shaped bracket 10 facing the bottom surface of the heat sink fins 13. The bottom surface of the heat sink fins 13 is made of 430 stainless steel and can be attracted and fixed by the magnets 16.

[0030] Working principle:

[0031] During operation, the heat generated by the core heat-generating chip 2 is transferred to the heat-conducting block 4 via thermal grease 5. The heat-conducting block 4 then conducts the heat to the aluminum nitride ceramic plate 12. While maintaining electrical insulation, the aluminum nitride ceramic plate 12 efficiently conducts the heat to the external heat dissipation fins 13. The large surface area of ​​the heat dissipation fins 13 facilitates heat exchange with the air, achieving efficient heat dissipation. The entire heat dissipation process is completely passive, requiring no openings or fans, ensuring the explosion-proof safety of the equipment.

[0032] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. An explosion-proof personal sound exposure meter, characterized in that: include: A personal sound exposure meter body (1) has a core heating chip (2) fixedly installed on its inner wall. An L-shaped bracket (3) is fixedly installed on the inner wall of the personal sound exposure meter body (1) below the core heating chip (2). A heat dissipation mechanism is provided on the L-shaped bracket (3). The heat dissipation mechanism includes: A heat-conducting block (4) is disposed on the top surface of the L-shaped bracket (3), and thermal grease (5) is disposed between the heat-conducting block (4) and the core heat-generating chip (2).

2. The explosion-proof personal sound exposure meter according to claim 1, characterized in that: The heat dissipation mechanism also includes: A limiting rod (6) is fixedly installed on the side wall of the heat-conducting block (4) facing the L-shaped bracket (3). A sliding block (7) is slidably installed on the outer surface of the limiting rod (6). A pressure plate (8) is fixedly installed on the side wall of the heat-conducting block (4) facing the sliding block (7). A compression spring (9) is sleeved on the outer surface of the limiting rod (6). One end of the compression spring (9) is connected to the side wall of the sliding block (7), and the other end is connected to the side wall of the L-shaped bracket (3).

3. The explosion-proof personal sound exposure meter according to claim 2, characterized in that: The heat dissipation mechanism also includes: Heat dissipation fins (13) are mounted on the right side wall of the personal sound exposure meter body (1) via a mounting assembly. A square window (11) is provided on the right side wall of the personal sound exposure meter body (1), and an aluminum nitride ceramic sheet (12) is welded into the square window (11).

4. The explosion-proof personal sound exposure meter according to claim 3, characterized in that: The installation components include: The U-shaped bracket (10) is fixedly installed on the right side wall of the personal sound exposure meter body (1), and the adjacent surfaces of the U-shaped bracket (10) are provided with slots (15).

5. The explosion-proof personal sound exposure meter according to claim 4, characterized in that: The installation components include: Two card blocks (14) are provided and are fixedly installed on the front and rear side walls of the heat dissipation fins (13). The card blocks (14) cooperate with the card slots (15). Multiple magnets (16) are embedded on the surface of the U-shaped bracket (10) facing the bottom of the heat dissipation fins (13).

6. The explosion-proof personal sound exposure meter according to claim 3, characterized in that: The bottom surface of the heat dissipation fins (13) is made of a material that can be attracted by a magnet (16), and the bottom surface of the aluminum nitride ceramic sheet (12) is attached to the top surface of the heat-conducting block (4).

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