An explosion-proof special power supply device with a damping structure

Abstract

The utility model relates to the technical field of explosion -proof power supply, concretely is a kind of explosion -proof special power device with damping structure, including by outside to inside setting's explosion -proof shell, primary damping unit, support frame, secondary damping unit and power core module, explosion -proof shell is equipped with high-strength shell, inner and outer wall radiating fin and explosion -proof gland, promote heat dissipation and explosion -proof performance, primary damping unit adopts the metal spring of four corners arrangement, outer butyl rubber damping layer, cooperate with spacing piece and telescopic guide column, effectively buffer large amplitude impact.Support frame is connected with shell by primary damping unit, secondary damping unit is constituted by support, silica gel pad and protective shell, protective shell is installed in support by sliding sleeve and locating bolt adjustable, inside is double piece and fills in damping gelatinous body for glued structure, realize high-frequency vibration fine isolation, explosion -proof gland penetrates multilayer structure, ensure explosion -proof continuity.

Description

Technical Field

[0001] This utility model relates to the field of explosion-proof power supply technology, specifically to a special explosion-proof power supply device with a vibration reduction structure. Background Technology

[0002] Existing explosion-proof power supplies mostly focus on the strength of the casing and the design of the explosion-proof gap, and do not give enough consideration to the adaptability to vibration environment. Especially in high vibration conditions such as locomotives, drilling platforms, and mobile equipment, internal components are prone to loosening, solder joints breakage, and circuit board fatigue damage due to mechanical impact, which seriously affects the reliability and safety of equipment operation.

[0003] Traditional explosion-proof power supplies typically employ rigid mounting structures or simply use simple rubber pads at the bottom for vibration damping. This damping effect is limited and cannot effectively isolate external vibrations from the transmission to sensitive components such as the PCB board, capacitors, and transformers. While some devices use spring-loaded vibration damping, the lack of damping design makes them prone to resonance, which can actually exacerbate vibration response. Furthermore, existing structures are mostly single-stage vibration damping, making it difficult to handle the combined effects of large-amplitude low-frequency impacts and high-frequency micro-vibrations, resulting in insufficient protection. Utility Model Content

[0004] Technical problems to be solved To address the shortcomings of existing technologies, this utility model provides a special explosion-proof power supply device with a vibration-damping structure.

[0005] (II) Technical Solution To achieve the above objectives, this utility model provides the following technical solution: A special explosion-proof power supply device with a vibration damping structure, comprising an explosion-proof power supply body, wherein the explosion-proof power supply body comprises, from the outside to the inside, an explosion-proof shell, a primary vibration damping unit, a support frame, a secondary vibration damping unit, and a power core module; the primary vibration damping unit is installed between the explosion-proof shell unit and the support frame, the secondary vibration damping unit is installed between the support frame and the power core module, the support frame is connected to the explosion-proof shell through the primary vibration damping unit, and the power core module is installed inside the secondary vibration damping unit.

[0006] Preferably, the explosion-proof housing includes a high-strength housing, heat dissipation fins, and an explosion-proof gland, wherein the heat dissipation fins are located on the inner and outer walls of the high-strength housing.

[0007] More preferably, the primary vibration damping unit includes at least four sets of metal springs, which are located at the four corners of the support frame respectively; the metal springs are wrapped with butyl rubber damping layers, and the two ends of the springs are welded to the explosion-proof shell and the support frame respectively through limiting plates; a telescopic guide column is provided between the support frame and the explosion-proof shell unit.

[0008] Preferably, the secondary vibration damping unit includes a bracket and a protective shell. The bracket is connected to the support frame by screws, and a silicone pad is provided between the bracket and the support frame. The protective shell is slidably connected to the bracket.

[0009] Preferably, the outer side of the protective shell is provided with a sliding sleeve, the sliding sleeve is fitted on the bracket, and the bracket is provided with a plurality of mounting holes. A positioning bolt is passed through the sliding sleeve by a threaded structure, and the positioning bolt is adapted to the mounting hole.

[0010] More preferably, the protective shell has a double-layer structure, and damping gel is provided between the two protective shells.

[0011] Preferably, the explosion-proof gland penetrates the explosion-proof housing, the support frame, and the protective housing, and the bottom end of the explosion-proof gland penetrates the protective housing through a threaded structure.

[0012] Preferably, the explosion-proof power supply body has a rectangular structure, the protective shell has several fixing holes on its side, and adjacent protective shells are spliced ​​together by screws passing through the fixing holes, and the power core module is installed on the inside of the protective shell.

[0013] (III) Beneficial Effects Compared with the prior art, this utility model provides an explosion-proof special power supply device with a vibration reduction structure, which has the following beneficial effects: This technical solution significantly improves the operational stability and safety of the power supply under harsh conditions such as high vibration and strong impact by employing a two-stage composite vibration damping system consisting of a primary vibration damping unit and a secondary vibration damping unit. The primary vibration damping unit uses a composite structure of metal springs and butyl rubber damping layers, arranged at the four corners of the support frame, effectively absorbing mid-to-low frequency large amplitude vibrations. The design of limiting plates and telescopic guide columns ensures the smooth operation of the support frame and prevents displacement. The secondary vibration damping unit adopts a sliding protective shell structure, combined with silicone pads and damping gel, to achieve precise buffering of high-frequency micro-amplitude vibrations, meeting the protection requirements of the power supply core module for micro-vibration sensitivity.

[0014] The explosion-proof housing is made of high-strength materials and features internal and external dual-sided heat dissipation fins, balancing explosion-proof performance with efficient heat dissipation. The explosion-proof gland has a multi-layered structure to ensure the sealing and explosion-proof continuity of the cable entry point. The protective housing adopts a double-piece sandwich structure and sliding sleeve positioning design, which facilitates installation, debugging, and maintenance, and supports multi-unit splicing to adapt to the integration of power modules of different specifications.

[0015] This device organically integrates explosion-proof, vibration reduction, and heat dissipation functions, effectively reducing vibration transmission rate, preventing component loosening, fatigue damage, and electrical connection failure, and significantly improving the reliability and service life of the power supply in high-risk environments such as mines, petrochemical plants, and rail transportation. It has advantages such as reasonable structure, high protection level, and convenient maintenance. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall equipment structure of this utility model; Figure 2 This is a schematic diagram of the explosion-proof shell structure of this utility model; Figure 3 This is a schematic diagram of the support frame structure of this utility model; Figure 4 This is a schematic diagram of the protective shell structure of this utility model; Figure 5 This is a schematic diagram of the structure of the power supply core module installed in the protective shell of this utility model; In the diagram: 1. High-strength outer shell; 2. Support frame; 3. Sliding sleeve; 4. Protective shell; 5. Metal spring; 6. Telescopic guide post; 7. Explosion-proof gland; 8. Bracket; 9. Heat dissipation fins; 10. Limiting plate; 11. Power core module; 12. Silicone pad; 13. Damping gel. Detailed Implementation

[0017] 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.

[0018] Please see Figure 1-5 This utility model discloses an explosion-proof special power supply device with a vibration damping structure, comprising an explosion-proof power supply body. The explosion-proof power supply body includes, from the outside to the inside, an explosion-proof shell, a primary vibration damping unit, a support frame 2, a secondary vibration damping unit, and a power core module 11. The primary vibration damping unit is installed between the explosion-proof shell and the support frame 2, and the secondary vibration damping unit is installed between the support frame 2 and the power core module 11. The support frame 2 is connected to the explosion-proof shell through the primary vibration damping unit, and the power core module 11 is installed inside the secondary vibration damping unit.

[0019] This technical solution uses a high-strength explosion-proof shell to resist external impacts and the intrusion of explosive media. The first-level vibration damping unit uses the composite characteristics of metal spring 5 and rubber damping to absorb high-frequency and low-frequency vibration energy. The support frame 2 serves as an intermediate carrier to achieve a stable connection between the vibration damping unit and the power module. The second-level vibration damping unit has customized protection schemes for the vibration resistance characteristics of different components. Finally, through the synergistic effect of each unit, it solves the pain points of low vibration damping efficiency, conflict between explosion protection and vibration damping, easy damage to components, and difficult maintenance in traditional explosion-proof power supplies, and achieves stable power supply in extreme environments such as underground coal mines and petrochemical plants.

[0020] The explosion-proof enclosure is the first line of defense against external risks. It achieves a synergy between explosion protection and heat dissipation through a high-strength structure and bidirectional heat dissipation. The working principles of each component are as follows: The explosion-proof principle of the high-strength outer shell 1 prioritizes the use of ADC12 aluminum alloy to construct a rectangular outer shell: The material has a tensile strength ≥280MPa and a compressive strength ≥200MPa, which can withstand the impact of falling rocks in coal mines and the bumps during equipment transportation, and prevent the outer shell from deforming and causing the explosion-proof gap to exceed the standard. The heat dissipation principle of the bidirectional heat dissipation fins 9: The heat dissipation fins 9 are distributed on both the inner and outer walls of the outer casing: Inner wall fins: directly contact the support frame 2, and conduct the heat from the power supply 2, mainly from the power core module 11, to the high-strength outer shell 1. Outer wall fins: Increase the contact area with the external environment and dissipate heat into the environment through air convection; The explosion-proof gland 7 penetrates the high-strength outer shell 1, the support frame 2, and the protective shell 4. The bottom of the explosion-proof gland 7 is threaded through the protective shell 4, while the remaining part slides through the support frame 2 and the high-strength outer shell 1 to ensure the vibration elasticity of the high-strength outer shell 1 and the support frame 2. The explosion-proof gland 7 is compatible with 10-16mm cables. When the cable passes through the explosion-proof gland 7, the explosion-proof gland 7 can embed a rubber sealing ring to tightly wrap the cable sheath, preventing dust / moisture from entering along the cable gaps.

[0021] The primary vibration damping unit is the core vibration damping component of the device. Through a composite structure consisting of a metal spring 5, a butyl rubber damping layer, and a telescopic guide post 6 for limiting, it achieves efficient absorption of vibrations across the entire frequency range of 10-500Hz. The working principles of each component are as follows: The low-frequency vibration reduction principle of the metal springs 5: Four sets of piano wire metal springs 5 ​​are fixed at the four corners of the support frame 2, and the two ends of the springs are welded to the outer shell / frame through limiting plates 10. For low-frequency vibrations of 10-50Hz, such as the periodic vibrations of mining machinery, the metal spring 5 absorbs the impact energy through the elastic deformation of compression and rebound, and the compression amount can be adaptively adjusted within the range of 5-15mm. The overall mass of the metal spring 5 stiffness matching device ensures that the initial compression is stable at 10mm when bearing the weight of the power module, ensuring that it always operates within the elastic working range during vibration and avoiding rigid impact.

[0022] The high-frequency vibration reduction principle of the butyl rubber damping layer: A 3mm thick butyl rubber damping layer is wrapped around the outside of the spring. For high-frequency vibrations of 100-500Hz, such as resonance during equipment operation, the internal friction damping between rubber molecules can convert vibration energy into heat energy and prevent high-frequency vibrations from being transmitted to the support frame 2, which could cause component solder joints to loosen. The butyl rubber damping layer also reduces noise generated by vibration.

[0023] The limiting and anti-deviation principle of the telescopic guide columns 6: Four telescopic guide columns 6 are provided between the support frame 2 and the outer shell. The horizontal offset of the support frame 2 is limited to ≤0.5mm to avoid structural damage caused by the collision between the frame and the shell during vibration; The guide column can extend and retract synchronously with the compression / rebound of the metal spring 5, ensuring uniform force on each vibration damping unit without affecting the vibration damping effect.

[0024] Support Frame 2: Intermediate carrier for vibration damping and installation Support frame 2 is preferably welded from Q235 steel plate and serves as the connecting carrier between primary and secondary vibration damping. Its working principle is as follows: The remaining vibration energy absorbed by the primary vibration damping unit is evenly transferred to the secondary vibration damping unit to avoid local stress concentration. The support frame 2 has pre-drilled screw holes on its surface, which allows for quick installation of the bracket 8 and protective shell 4 of the secondary vibration damping unit, and is compatible with different power modules, such as 12Ah / 24Ah batteries. Secondary vibration damping unit: Dedicated protection for components The bracket 8 is connected to the support frame 2 by four M5 screws, and a silicone pad 12 is provided between the bottom of the bracket 8 and the support frame 2. The elastic deformation of silicone pad 12 can absorb vibration energy, such as when the vibration acceleration is reduced from 100 m / s². 2 Reduced to 10 m / s 2 The following measures are taken to avoid noise and efficiency loss caused by a loose iron core.

[0025] The outer sleeve 3 of the protective shell 4 is fitted onto the bracket 8 and fixed to the mounting holes of the bracket 8 by positioning bolts: The sliding sleeve 3 can slide along the bracket 8 to adjust the position of the protective shell 4 and adapt to capacitors / relays with different layouts; The protective shell 4 is preferably made of ABS material, with an internal rubber pad to buffer lateral vibration and prevent capacitor leads from desoldering.

[0026] The two protective shells 4 are joined together with screws, and the interior is filled with damping gel 13 with a viscosity of 100,000 cP. The viscous properties of damping gel 13 can isolate high-frequency micro-vibrations, and the chip operating temperature fluctuation is ≤±2℃, avoiding output voltage instability caused by temperature drift. The dual-piece structure facilitates disassembly and maintenance, allowing for the individual replacement of damaged precision components without disassembling the entire vibration damping system.

[0027] Power core module 11 and overall wiring In practical applications, the power core module 11 typically includes an AC / DC conversion module, a lithium iron phosphate battery pack, and protection circuitry. The wiring protection principle of the explosion-proof gland 7: The cable passes through the outer shell, support frame 2 and protective shell 4 through the explosion-proof gland 7, and adopts a compartmentalized wiring design: For example, the input cable (AC) and the output cable (DC) are introduced through different explosion-proof glands 7 to avoid interference between strong and weak currents; The cable is usually secured inside the protective casing 4 using conventional cable clamps to prevent the joints from loosening due to cable pulling during vibration.

[0028] Detailed system workflow, taking emergency communication power supply application in underground coal mines as an example. Installation of primary vibration damping unit Metal limiting plates 10 are welded to the four corners of the support frame 2, and the two ends of the spring wrapped with butyl rubber damping layer are welded to the limiting plates 10 and the inner wall of the outer shell, respectively. Install telescopic guide column 6 to ensure smooth telescopic extension and retraction without jamming.

[0029] Assembly of support frame 2 and secondary vibration damping unit Install bracket 8, place silicone pad 12 at the bottom of bracket 8, and fix it with M5 screws; Slide the protective shell 4 and slide the 3 onto the bracket 8, adjust the position, and then screw in the positioning bolt. The two protective shells 4 are spliced ​​together, filled with damping gel 13, and fixed to the frame with screws.

[0030] Power core module 11 installation and wiring Place the AC / DC converter module and the 12Ah lithium iron battery pack into the protective case 4 and secure them with screws. Connect the internal wires: AC input to explosion-proof gland 7 → conversion module → battery → DC output to another explosion-proof gland 7, and fix the wires with wire clips; After checking the insulation resistance and output voltage and confirming that they are correct, close the casing and tighten the flange screws.

[0031] On-site deployment phase Installation and Fixing: Fix the device to the wall of the refuge chamber in the underground coal mine using expansion bolts, away from the vibration source of mining machinery; Cable connection: Introduce AC127V power through explosion-proof gland 7, connect the output end to the emergency communication terminal, and tighten explosion-proof gland 7; After powering on, check the output voltage and vibration reduction status. Once confirmed to be normal, put it into use.

[0032] Operation and maintenance phase Daily operation monitoring Visual inspection: The casing was found to be undeformed, the heat sink fins were undamaged, and the glands were not loose; Parameter monitoring: Output voltage and battery level can be read via the power module's built-in display screen; Vibration detection: Touching the explosion-proof casing, there is no obvious high-frequency vibration.

[0033] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A special explosion-proof power supply device with a vibration damping structure, characterized in that, The explosion-proof power supply body includes, from the outside to the inside, an explosion-proof shell, a primary vibration damping unit, a support frame (2), a secondary vibration damping unit, and a power core module (11). The primary vibration damping unit is installed between the explosion-proof shell unit and the support frame (2), and the secondary vibration damping unit is installed between the support frame (2) and the power core module (11). The support frame (2) is connected to the explosion-proof shell through the primary vibration damping unit, and the power core module (11) is installed inside the secondary vibration damping unit.

2. The explosion-proof special power supply device with vibration damping structure according to claim 1, characterized in that, The explosion-proof housing includes a high-strength housing (1), heat dissipation fins (9), and an explosion-proof gland (7). The heat dissipation fins (9) are located on the inner and outer walls of the high-strength housing (1).

3. The explosion-proof special power supply device with vibration damping structure according to claim 1, characterized in that, The primary vibration damping unit includes at least four sets of metal springs (5), which are located at the four corners of the support frame (2); the metal springs (5) are wrapped with butyl rubber damping layers, and the two ends of the springs are welded to the explosion-proof shell and the support frame (2) respectively through limiting plates (10); a telescopic guide column (6) is provided between the support frame (2) and the explosion-proof shell unit.

4. The explosion-proof special power supply device with vibration damping structure according to claim 2, characterized in that, The secondary vibration damping unit includes a bracket (8) and a protective shell (4). The bracket (8) is connected to the support frame (2) by screws, and a silicone pad (12) is provided between the bracket (8) and the support frame (2). The protective shell (4) is slidably connected to the bracket (8).

5. The explosion-proof special power supply device with vibration damping structure according to claim 4, characterized in that, The outer side of the protective shell (4) is provided with a sliding sleeve (3), which is sleeved on the bracket (8). The bracket (8) is provided with several mounting holes. The sliding sleeve (3) has a positioning bolt passing through it by a threaded structure, and the positioning bolt is adapted to the mounting hole.

6. The explosion-proof special power supply device with vibration damping structure according to claim 5, characterized in that, The protective shell (4) has a double-layer structure, and damping gel (13) is provided between the two protective shells (4).

7. The explosion-proof special power supply device with vibration damping structure according to claim 4, characterized in that, The explosion-proof gland (7) penetrates the explosion-proof shell, the support frame (2) and the protective shell (4), and the bottom end of the explosion-proof gland (7) penetrates the protective shell (4) through a threaded structure.

8. The explosion-proof special power supply device with vibration damping structure according to claim 7, characterized in that, The explosion-proof power supply body is a rectangular structure. The protective shell (4) has several fixing holes on its side. Adjacent protective shells (4) are spliced ​​together by screws through the fixing holes. The power core module (11) is installed inside the protective shell (4).

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