Dry Pipe Valve Clapper Assembly with Threaded Seat
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional dry pipe/deluge valves for fire protection systems face challenges in efficiently controlling fluid flow and sealing mechanisms, particularly in maintaining pressure differentials and preventing accidental activation, which can lead to damage in sensitive areas like computer facilities.
Innovation Solution
A dry/deluge valve design featuring a main chamber with a clapper assembly and sensing chamber, where the clapper is hinged to a collar and lever, allowing for precise control of fluid flow through a threaded valve seat and sealing disk, and a piston and diaphragm mechanism responsive to pressure changes, ensuring reliable operation and prevention of accidental activation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional dry pipe valve uses a sealed clapper cover to maintain pressure differential, then the valve can control fluid flow effectively, but the complexity of the sealing mechanism increases and accidental activation risk increases
Solution Approach 1:
The patent removes the clapper cover entirely, extracting the sealing function from the traditional covered design. The clapper assembly is now open-exposed with the clapper disc directly sealing against the valve seat, eliminating the need for a separate cover and its associated gaskets and sealing mechanisms.
Solution Approach 2:
The valve is segmented into distinct functional components: the clapper assembly (with clapper disc, stem, and collar) is separable from the valve body, allowing independent maintenance and replacement of the sealing elements without disturbing the entire valve structure.
2Reliability
If a conventional dry pipe valve uses a complex sealing mechanism to prevent accidental activation, then activation reliability improves, but ease of operation and maintenance decreases
Solution Approach 1:
The clapper cover is removed entirely, extracting the sealing function from the covered design. The clapper assembly is now open-exposed with the clapper disc directly sealing against the valve seat, eliminating the need for a separate cover and its associated gaskets and sealing mechanisms.
Solution Approach 2:
The valve design allows the clapper assembly to be easily removed and reinstalled by operators without requiring specialized tools or complex disassembly procedures. The simplified structure enables routine maintenance and inspection to be performed more readily.
3Measurement precision
If a conventional dry pipe valve uses a sealed design to maintain pressure balance, then pressure control precision improves, but device complexity increases
Solution Approach 1:
The clapper cover is removed entirely, extracting the sealing function from the covered design. The clapper assembly is now open-exposed with the clapper disc directly sealing against the valve seat, eliminating the need for a separate cover and its associated gaskets and sealing mechanisms.
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 valve effectively controls fluid flow and prevents accidental activation, ensuring reliable fire suppression while minimizing damage in sensitive environments by maintaining precise pressure control and sealing mechanisms.
Implementation Method 1
The valve maintains a balance (i.e., a pressure differential) between the pressure in the sensing chamber and the pressure in the fluid supply input line
Implementation Method 2
A pressure drop in the sensing chamber below a certain threshold allows the clapper to be forced open by the pressure in the supply line
Data Source
Figure 1
Figure 2
Figure 3A
AI summary
A dry/deluge valve for an automatic sprinkler system. The valve includes a main chamber having an input port for receiving fluid from a supply line and an output port. A clapper assembly is installed in the main chamber for sealing the input port. The clapper assembly includes a threaded valve seat configured to be screwed into a wall of the main chamber, so as to be in communication with the input port. The assembly further includes a collar configured to receive the valve seat, wherein the collar is held in position by the valve seat. A clapper configured to seal the input port, in cooperation with the valve seat, is hinged to the collar, and a lever also is hinged to the collar and is movable between a first position in which the clapper is held closed by the lever and a second position in which the clapper is allowed to open. The dry pipe/deluge valve further includes a sensing chamber having components responsive to a control pressure of the sensing chamber, the components being in communication with the lever to move the lever between the first position and the second position.