Closed Rivet Plug with Conical Head for Leak-Proof Sealing
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Solution Overview
Problem
Existing rivet plugs used in high-temperature, high-pressure, and vibrating environments tend to fall off or leak, posing safety hazards and causing significant losses due to their inability to maintain a secure seal in processed holes of components like crankshafts, pistons, and engine cylinders.
Innovation Solution
A closed rivet plug design featuring a hollow cylindrical rivet housing with an inward recessed arc and a rivet core with a truncated cone-shaped head, anti-slip patterns, and circular arc-shaped chamfers, ensuring a tight fit and preventing accidental falling by deforming to provide a secure seal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If ball expansion plugs, thread sealing plugs or stud sealing plugs are used for plugging processed holes, then the plugging function is provided, but the plugs may fall off under constant high temperature, high pressure or strong vibration
Solution Approach 1:
The plug is divided into two main segments: a rivet housing (outer shell) and a rivet core (inner component). The rivet core fits tightly within the hollow space of the rivet housing, creating a segmented structure that combines the advantages of both components for enhanced reliability while maintaining simplicity.
Solution Approach 2:
The rivet core is nested within the rivet housing, with the rivet core's outer surface fitting closely to the inner surface of the rivet housing. This nested configuration allows the smaller component to be contained within the larger one, creating a compact and reliable plug structure.
2Reliability
If conventional plugs are used, then plugging is provided, but leakage occurs from plugged processed holes under extreme conditions
Solution Approach 1:
The rivet head is designed with a conical surface that provides localized sealing quality at the interface between the rivet core and rivet housing. This local quality enhancement ensures effective sealing at the critical interface without requiring complex manufacturing throughout the entire structure.
Solution Approach 2:
The rivet head features a conical (curved) surface rather than a flat surface. This curved geometry allows for better distribution of contact pressure and improved sealing performance at the interface, preventing leakage under high pressure and temperature conditions.
3Reliability
If processed holes need plugging in crankshafts, pistons, air cylinders and engine cylinders, then safety hazards are prevented, but existing plugs may cause immeasurable loss when they fall off
Solution Approach 1:
The rivet core is preliminarily positioned within the rivet housing during assembly, with the rivet head fitting into the hollow space of the rivet housing before final installation. This preliminary positioning ensures proper alignment and secure retention from the outset, preventing fallback during operation.
Solution Approach 2:
The rivet structure is designed to be self-retaining through the tight fit between the rivet core and rivet housing, along with the conical rivet head configuration. The structure serves itself to maintain secure positioning without requiring additional complex retention 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 closed rivet plug provides a firm, reliable, and leak-proof seal with a simple structure and low manufacturing cost, preventing safety hazards and losses by maintaining a sealed state even under extreme conditions.
Implementation Method 1
the upper part of the rivet housing will generate certain deformation outward on the out sides when the rivet head of the rivet core is started to be extracted out from the rivet housing
Implementation Method 2
The rivet rod of the rivet core is provided with anti-slip ring patterns
Implementation Method 3
When the rivet head of the rivet core is completely extracted out of the rivet housing, the lower part of the rivet housing will generate certain deformation by the effect of the conical surface of the rivet head
Data Source
AI summary
The present invention discloses a closed rivet plug. The closed rivet plug is mainly comprised of a rivet core and a rivet housing; the rivet housing is hollow and cylindrical and has one closed end; the closed end of the cylindrical rivet housing is provided with an inward recessed arc; the rivet core consists of a rivet rod and a rivet head; the rivet core closely fits the hollow space of the cylindrical rivet housing through the rivet head; the top of the rivet head of the rivet core is provided with a pit matched with the recessed arc at the closed end of the cylindrical housing; and the rivet head of the rivet core is entirely shaped as a truncated cone. The invention has advantages of avoiding falling off and completely preventing safety hazards caused by leakage from the processed holes, together with firm and reliable plugging, simple structure, low manufacturing cost, quick and convenient plugging.