Explosion-Proof LED Light Indicator with Insulating Gel
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Solution Overview
Problem
Existing light indicators for high explosion risk environments are structurally complex, costly, and cumbersome due to their large size and bulk, making them difficult to install in hard-to-access settings, and require additional components like cable glands for electrical connections.
Innovation Solution
A light indicator with a simplified design featuring a support structure with concave seats for LEDs, a metal support body with integrated heat dissipation, and a collimation lens, along with an insulating silicone gel layer to prevent spark generation, all housed in a compact and lightweight configuration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a hermetically-sealed containment body is used to prevent infiltration of explosive gases, then safety and reliability are improved, but structural complexity and manufacturing cost increase
Solution Approach 1:
The patent removes the complex hermetically-sealed containment body from the design. Instead of enclosing all components in a sealed metal housing, the invention extracts only the essential safety function by using explosion-proof LED sources that inherently cannot generate sparks, eliminating the need for complex sealing structures while maintaining safety in explosive environments.
Solution Approach 2:
The patent adopts a simpler, more economical design approach by replacing expensive hermetically-sealed metal containment bodies with a lightweight plastic housing. The design accepts that the housing may not be perfectly sealed but compensates by using intrinsically safe LED technology that eliminates spark generation, thereby reducing manufacturing costs and structural complexity while maintaining adequate safety.
2Reliability
If a hermetically-sealed containment body is used to prevent infiltration of explosive gases, then safety is improved, but manufacturing cost increases
Solution Approach 1:
The patent replaces expensive hermetically-sealed metal containment bodies with inexpensive plastic housings. By using intrinsically safe LED technology that cannot generate sparks, the design achieves adequate safety without requiring costly sealed constructions, thereby significantly reducing manufacturing costs while maintaining functional safety in explosive environments.
3Reliability
If a hermetically-sealed containment body with considerable size is used, then safety is improved, but ease of installation deteriorates
Solution Approach 1:
The patent removes the bulky hermetically-sealed containment body from the design. By extracting only the essential safety function through intrinsically safe LED technology, the invention achieves a compact, lightweight indicator that is easy to install in hard-to-reach locations while maintaining adequate safety performance.
Solution Approach 2:
The patent changes the physical parameters of the housing material from heavy metal to lightweight plastic, and reduces the overall size by eliminating the hermetic seal requirement. This parameter change maintains safety through intrinsic LED safety while dramatically improving ease of installation in difficult-to-access locations.
4Reliability
If cable glands are added for electrical cable passage, then electrical connection safety is improved, but device complexity and cost increase
Solution Approach 1:
The patent removes cable glands and complex cable sealing mechanisms from the design. By using intrinsically safe LED technology and accepting non-hermetic housing, the invention eliminates the need for specialized cable glands, thereby reducing structural complexity and manufacturing cost while maintaining adequate electrical connection safety through simplified entry points.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution enables a structurally simple, cost-effective, and efficient light indicator that effectively dissipates heat and prevents spark generation, facilitating easier installation and operation in hazardous environments while maintaining reliability and safety.
Implementation Method 1
an insulating silicone gel layer to prevent spark generation
Implementation Method 2
a metal support body with integrated heat dissipation
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
Light indicator, which comprises a support structure (2) provided with multiple seats (3), each of which housing at least one row of LEDs (5) at its interior and at least one power supply circuit (24) electrically connected to the LEDs (5) in order to provide electrical power supply to the latter. The light indicator also comprises at least one collimation lens (30) positioned in front of the corresponding row of LEDs (5), and at least one insulating material layer (51) deposited in each seat (3) to cover the aforesaid power supply circuit (24) of the LEDs (5). More in detail, each lens (30) comprises an elongated body (31), which is extended parallel to the corresponding row of LEDs (5), and on the rear part is provided with an abutment portion (33) fixed on the base surface (4) of the seat (3) and provided with a rear groove (34) parallel to the extension direction (Z) and housing the row of LEDs (5) at its interior. The abutment portion (33) of each lens (30) is closed transversely and longitudinally by longitudinal walls (35) and transverse walls (36) which define a rear edge (37), which adheres to the base surface (4) of the seat (3) in order to prevent the insulating material (51) from penetrating into the rear groove (34).