Sprinkler Head Set Screw Disk Spring Assembly
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Solution Overview
Problem
The existing sprinkler heads with integrated disk springs face issues of damage due to excessive assembly loads and unstable positioning, leading to potential water leakage and malfunction during fire fighting operations.
Innovation Solution
A sprinkler head design featuring a set screw coupled to a thermosensitive portion with a disk spring having a through hole at its center, which is inserted into, and held by, the set screw, preventing excessive load application and ensuring stable positioning through a head portion that forms a gap for clamping and a washer for uniform load distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If integrated disk springs are used to compensate for assembly load fluctuation, then the reliability of the sprinkler head is improved, but the disk springs may be damaged when excessive assembly load is applied
Solution Approach 1:
A buffer member is introduced between the disk spring and the frame to absorb excessive assembly load before it reaches the disk spring. This cushioning mechanism prevents the disk spring from direct exposure to excessive forces, thereby preventing damage while maintaining its load compensation function.
Solution Approach 2:
The buffer member serves as an intermediary element between the frame and the disk spring. It mediates the force transmission, allowing the disk spring to compensate for normal load fluctuations while protecting it from excessive loads that would cause damage.
2Device complexity
If disk springs are simply stored in a cylindrical tubular member, then the device complexity is reduced, but the positioning cannot be fixed
Solution Approach 1:
The buffer member acts as an intermediary that provides both positioning and cushioning functions. It stabilizes the disk spring's position within the frame while maintaining the simplicity of the overall storage structure, avoiding the need for complex positioning mechanisms.
3Strength
If the head portion of the set screw forms a gap for clamping the disk spring, then the disk spring is protected from excessive load, but the structure becomes more complex
Solution Approach 1:
The set screw is segmented into distinct functional portions: a head portion that forms the clamping gap and a shaft portion that provides the fastening function. This segmentation allows the head portion to serve as a protective spacer while maintaining the overall simplicity of the fastening mechanism.
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
This design effectively prevents disk spring damage from excessive loads and ensures stable operation, maintaining reliable water discharge and fire fighting performance.
Implementation Method 1
a spring member such as a disk spring in a frame. The spring member is used for compensating fluctuation of an assembly load
Implementation Method 2
a thermosensitive portion configured to support the valve body
Data Source
AI summary
A sprinkler head 1 includes a head body 10 having a water discharging cylinder 16 in the interior thereof, a frame 20 connected to the head body 10, a valve body 30 provided in the interior of the frame 20 and closing a water discharging port 12 of the water discharging cylinder 16, a thermosensitive portion 51 configured to support the valve body 30, and a disk spring 64 provided between the valve body 30 and the thermosensitive portion 51. A set screw 65 to be coupled to the thermosensitive portion 51 is provided under the valve body 30, and the set screw 65 is inserted into a through hole 64a at the center of the disk spring 64. The set screw 65 includes a head portion and a leg portion, and the head portion is formed to be higher than the height of the disk spring 64.