Spray Head Movable Body Retaining Arrangement
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Solution Overview
Problem
Existing spray heads for fire extinguishing systems are prone to detachment during activation, leading to potential harm and exposure to external forces and vandalism, and lack a secure mechanism to prevent unwanted activation or separation of parts.
Innovation Solution
A movable spray head design with a retaining arrangement, utilizing a sealer ring or bonding agent, that maintains the spray head in an inactive position until pressurized medium forces it to a ready position, eliminating the need for a separate protective dome and preventing loose parts from detaching.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a separate protection device is used to protect the nozzles and triggering device, then the spray head is protected from external forces and vandalism, but the protection device becomes detached during activation and may cause harm by striking people, animals or equipment
Solution Approach 1:
The invention merges the protection function with the spray head body itself. The spray head body is designed to be movable between inactive and ready positions, eliminating the need for a separate protective dome. The body itself provides protection when in the inactive position covered by the fastening body, and becomes the active component when moved to the ready position, thus combining protection and functionality in one integrated structure.
Solution Approach 2:
The invention extracts the protective dome as a separate component and eliminates it entirely. Instead of having a detached protection device that falls off during activation, the design uses the spray head body's own movement to provide protection when needed and functionality when activated, removing the harmful separate protection device from the system.
2Ease of operation
If the spray head body is made movable to enable activation, then the spray head can transition from inactive to ready position, but the spray head body may become detached unintentionally due to external forces or vibration
Solution Approach 1:
The retaining arrangement is designed to preemptively counteract external forces such as vibration and impacts that could cause unwanted detachment. The retaining elements engage with the spray head body before activation occurs, creating a secure connection that prevents premature movement while allowing controlled movement when activation is intended through the triggering device.
Solution Approach 2:
The retaining arrangement acts as an intermediary mechanism between the fastening body and the spray head body. It provides a controlled connection that allows the spray head body to move from inactive to ready position when intended, while preventing unwanted movement due to external forces. The retaining elements engage and disengage in a controlled manner, mediating between the need for movability and the need for stability.
3Reliability
If a retaining arrangement is added to prevent unwanted movement, then the spray head remains secure in inactive position, but the device complexity increases
Solution Approach 1:
The retaining arrangement is segmented into multiple simple retaining elements distributed around the spray head body. Each retaining element is a simple component that engages with a corresponding feature on the spray head body. This segmentation allows the retaining function to be achieved through multiple simple, redundant elements rather than a single complex mechanism, making the overall system more reliable while keeping individual components simple.
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 provides effective protection against external forces and vandalism, ensuring the spray head remains secure and functional, even in harsh environments like public premises and vehicles, without risking unwanted activation or part separation.
Implementation Method 1
spray head body (3) being arranged to be movable by the pressure of the medium in relation to fastening body (2) from the first position to the second position
Implementation Method 2
retaining arrangement (18, 19, 20) has been arranged between spray head body (3) and fastening body (2), adapted to keep spray head body (3) in the first position, until the pressure of the medium exceeds a preset value
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A spray head (1 ), comprising a fastening body (2), a spray head body (3) with at least one nozzle (4) and a thermally activated triggering device (5), said spray head body (3) being arranged into fastening body (2), in its cylinder space (21 ) to be movable between two positions, the first position, in which spray head is in the inactive state, and the second position, in which the spray head body is extended out, said spray head body (3) being arranged to be movable through the effect of pressurized medium in relation to fastening body (2) from the first position to the second position. A retaining arrangement (18, 19, 20) has been arranged between spray head body (3) and fastening body (2), adapted to keep spray head body (3) in the first position, until the pressure of the medium exceeds a preset value.