Yard Hydrant Locking Collar Hardened Steel Vandalism
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Solution Overview
Problem
Outdoor yard hydrants are vulnerable to vandalism due to the weakness of chain-based locking mechanisms, which can be easily cut or sawed through, necessitating a more secure locking solution that utilizes the existing structure of the hydrant handle.
Innovation Solution
A hardened steel locking collar with two mirror-image C-shaped plates hinged at one end and equipped with locking holes for a hardened steel padlock, featuring a tapered slot to accommodate the padlock's movement and secure the hydrant handle in place, allowing for easy adaptation to various pipe diameters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a chain and padlock are used to secure the hydrant handle, then the locking mechanism is simple to implement, but the chain is vulnerable to being cut or sawed through
Solution Approach 1:
The invention changes the material parameter from soft chain to hardened steel collar, and changes the geometric parameter from open chain links to a solid collared structure with integrated locking holes, thereby maintaining simplicity while dramatically improving resistance to cutting and sawing
Solution Approach 2:
The locking collar is constructed from hardened steel, combining the strength and cut-resistance properties of hardened metal with the functional requirements of a locking mechanism, creating a composite structure that is both secure and simple to implement
2Reliability
If a hardened steel locking collar is used instead of a chain, then security against vandalism is improved, but the device complexity increases
Solution Approach 1:
The locking collar is divided into two separate C-shaped plates (upper and lower) that can be independently positioned and secured, allowing for easier installation and maintenance while maintaining the overall security function of the unified collar structure
Solution Approach 2:
The locking collar serves multiple functions: it acts as a protective barrier around the pipe, provides structural mounting points via locking holes for the padlock, and creates a rigid framework that prevents handle manipulation, thereby improving security without proportionally increasing complexity
3Manufacturing precision
If the locking collar is designed for a specific pipe diameter, then manufacturing precision is improved, but adaptability to different pipe sizes decreases
Solution Approach 1:
The C-shaped plate design allows the collar to dynamically adapt to different pipe diameters through elastic deformation and adjustable positioning, enabling a single design to accommodate various pipe sizes while maintaining precise fitting through the hardened steel material properties
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 locking collar effectively prevents unauthorized access to the hydrant handle by securely locking it in place, using a hardened steel padlock that cannot be easily cut or sawed, providing enhanced security against vandalism.
Implementation Method 1
a hardened steel padlock that cannot be easily cut or sawed
Implementation Method 2
two mirror-image top and bottom C-shaped plates made of hardened steel. The top and bottom plates are hinged at one end by a pivot pin
Data Source
AI summary
A yard hydrant locking collar has two C-shaped steel hardened plates connected together at one end by a rivet. The rivet acts like a hinge and allows the top and bottom plates to swivel open and closed. The other end of each top and bottom plates has a locking hole. A one inch tapered slot is cut into the top plate near the locking hole. The top and bottom plates are rotated so the collar fits around the hydrant pipe. The locking holes and slot are positioned near the hydrant locking hole and the collar locking holes are aligned. A padlock is opened and tilted away from the pipe and the free arm of the padlock is placed through the locking hole of the hydrant handle and positioned over the locking holes of the collar. The padlock is then tilted back towards the pipe. The tapered slot allows the padlock to move towards the pipe so that the free end of the padlock can move through the locking holes. Once the free end of the padlock passes through the collar locking holes, the padlock can be raised and locked. The locking collar and hydrant handle are thus locked together to prohibit movement of the handle.