Horizontal Sidewall Sprinkler Deflector Deployment
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Solution Overview
Problem
Horizontal sidewall fire protection sprinklers face challenges in evenly distributing fire-extinguishing fluid to cover large areas, particularly in ensuring adequate coverage of walls and corners, as per standards like UL 199 and UL 1626, with existing designs often falling short in achieving the required distribution patterns.
Innovation Solution
The design incorporates a dual-phase deflector deployment mechanism with a conical spring and guide pins, supported by a yoke and levers, which ensures the deflector protrudes sufficiently to cover areas up to 0.763 meters above the floor elevation, utilizing a slide plate and guide pins to enhance fluid distribution and reduce backwash, along with a diffuser assembly for optimized water pattern delivery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the sprinkler is designed with a conventional fixed deflector, then the structure is simple, but the fluid distribution pattern is insufficient to cover large areas and reach walls and corners effectively
Solution Approach 1:
The patent applies the dynamics principle by transforming the fixed deflector into a movable component that can protrude from the sprinkler body. The deflector is connected to a slide plate that can move along guide pins, allowing the deflector to transition from a retracted to a protruding position. This dynamic adjustment enables the sprinkler to achieve comprehensive coverage of large areas including walls and corners, while maintaining a compact structure when not in use.
Solution Approach 2:
The patent segments the sprinkler system into distinct functional components: the sprinkler body, the movable deflector, the slide plate, and the guide pin mechanism. This segmentation allows each component to perform its specific function independently - the deflector directs fluid, the slide plate provides movement, and the guide pins constrain the motion path. The segmented design enables complex fluid distribution patterns without requiring the entire system to be overly complicated.
2Area of stationary object
If the deflector protrudes sufficiently to cover areas up to 0.763 meters above floor elevation, then the coverage area is improved, but the device complexity increases due to the dual-phase deployment mechanism
Solution Approach 1:
The patent implements periodic action through its dual-phase deployment mechanism. Phase 1 occurs when the seal cap is removed and pressurized fluid begins to flow, initiating the deployment. Phase 2 occurs when the deflector reaches its fully protruded position and stabilizes. This two-stage periodic deployment ensures the deflector achieves the required 0.763 meters coverage height while using a manageable mechanism that activates sequentially rather than requiring continuous complex control.
Solution Approach 2:
The guide pins are pre-installed in the sprinkler body, establishing the movement path for the slide plate and deflector before deployment occurs. The conical spring is pre-compressed, storing potential energy ready to drive the protrusion motion. This preliminary preparation of the deployment path and energy storage mechanism simplifies the overall system by eliminating the need for complex real-time control during the deployment process itself.
3Manufacturing precision
If a dual-phase deflector deployment mechanism is used, then the fluid distribution is improved, but the manufacturing complexity increases
Solution Approach 1:
The patent utilizes parameter changes, specifically the conical shape of the spring and the geometry of the guide pins, to control the deflector's movement. The conical spring's taper provides a progressive force during deployment, while the guide pins' specific dimensions and angles ensure accurate positioning. By optimizing these geometric parameters, the patent achieves precise fluid distribution patterns without requiring complex manufacturing processes - the precision comes from well-chosen dimensions rather than sophisticated fabrication techniques.
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 effectively achieves even fluid distribution across walls and corners, meeting or exceeding the coverage requirements set by fire safety standards, ensuring comprehensive fire protection in residential and commercial applications.
Implementation Method 1
A conical spring and guide pins are provided, which work in conjunction with a yoke and levers to deploy the deflector in a dual-phase sequence
Implementation Method 2
The release mechanism is designed to release the cap under predetermined conditions, thereby initiating the flow of the fire-extinguishing fluid. A typical release mechanism includes a thermally-responsive element, e.g., a frangible bulb or a fusible link
Data Source
Figure 1A
Figure 1B
Figure 1C~1E
AI summary
A horizontal sidewall sprinkler is provided which includes a sprinkler body having an inlet passage for supply of a fluid and an outlet, the outlet being closed by a scaling assembly prior to actuation of the sprinkler. The sprinkler further includes a sleeve body secured to the sprinkler body and a yoke substantially spanning a width of the sleeve body, the yoke urging a load screw against a surface of the sealing assembly facing an occupancy, and being held in place prior to actuation of the sprinkler by two levers that are joined by a soldered link. A slide plate is located near an inner wall of the sprinkler body facing the occupancy prior to actuation of the sprinkler. According to one example embodiment, a frame or two guide pins are provided for bearing and supporting a deflector.