Bayonet Lock Housing for Explosion-Proof Sealing
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Solution Overview
Problem
Existing explosion-proof, flameproof housings for electrical equipment are often difficult to open and close due to complex locking mechanisms, such as large diameter threads or numerous screws, which are time-consuming and prone to jamming.
Innovation Solution
A bayonet lock mechanism with a cylindrical section and securing part that allows easy assembly and disassembly, featuring pins and longitudinal slots for secure locking, and a fastening means that requires a special tool for release, ensuring the housing can be easily opened and closed while maintaining flameproof integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a locking part with a thread or many individual screws is used to close the housing, then the housing can be securely closed, but it becomes time-consuming and difficult to open and close
Solution Approach 1:
The locking mechanism is segmented into a closure part with pins and a receiving part with longitudinal slots and transverse slots, allowing the connection to be divided into insertion and locking phases that are quicker and easier to operate than traditional threaded or multi-screw systems
Solution Approach 2:
The bayonet lock mechanism allows dynamic insertion and rotation for quick connection, while the securing part with securing elements provides static locking once connected, combining the speed of dynamic connection with the reliability of static locking
2Reliability
If a large diameter thread is used for the locking part, then the housing can be securely closed, but it has to be screwed in carefully to avoid jamming and is often difficult to open again
Solution Approach 1:
The traditional threaded mechanical connection is replaced with a bayonet lock system using pins engaging with longitudinal slots and transverse slots, eliminating the complexity of large diameter threads while maintaining secure closing through the securing part
3Reliability
If many individual screws or connecting parts are used to close the housing, then the housing can be securely closed, but closing and opening becomes very time-consuming
Solution Approach 1:
Multiple individual screw connections are merged into a single bayonet lock mechanism where multiple pins engage simultaneously with longitudinal slots, and the securing part provides unified locking, dramatically increasing closing and opening speed while maintaining secure connection
Data Source
Figure 1~5
Figure 6~8
AI summary
Explosion-proof, pressure-resistant housing (17) with a receiving part (3) for electrical equipment and with a locking part (2) that closes the receiving part (3) via a bayonet fitting, - wherein the locking part (2) has a cylindrical section (7) with which it is inserted into a cylindrical outer wall (9) of the receiving part (3) forming a flameproof gap (18), - wherein the cylindrical section (7) of the locking part (2) has pins (8) distributed around its circumference and the cylindrical outer wall (9) of the receiving part (3) has longitudinal slots distributed around its circumference and extending in the insertion direction (4), at the ends of which short transverse slots extending transversely to the insertion direction are connected for receiving the pins (8), - wherein a locking part (1) is pushed onto the locking part (2), which has locking elements (12) distributed around its circumference,which engage in the longitudinal slots (10) and thereby prevent the pins (8) from being unscrewed from the transverse slots (11), and wherein the locking element (1) is attached to the locking element (2) by means of at least one fastening element (19) which can only be released by means of a tool.