High-Pressure Tank Manifold Gas Discharge Path

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Solution Overview

Problem

Conventional high-pressure tanks face an issue where gas leaks through gaps between the opening and the inserted portion of the lid-like member, leading to increased load on the manifold due to accumulated leaking gas, and increasing the screwing length to address this problem reduces the storage capacity.

Innovation Solution

Incorporating a communicating path that allows the abutting surface of the lid-like member to communicate with the outside of the tank, enabling leaking gas to be discharged, thus preventing accumulation and load increase.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Strength

If the length of the internal thread portion and external thread portion is increased to increase tightening force, then the tightening force is improved, but the storage capacity decreases

Engineering Contradiction:
Improvetightening forceVSAvoidstorage capacity
Core Design Contradiction:
StrengthVSVolume of stationary object

Solution Approach 1:

The patent extracts the leaking gas from the accumulation zone (abutting surface) by providing a communication path that leads to a discharge opening. This removes the harmful accumulated gas without requiring increased thread length, thus maintaining both tightening force and storage capacity.

Inventive Principle:
Principle #2Taking out (Extraction)

Solution Approach 2:

The communication path acts as an intermediary channel between the abutting surface and the external environment. It provides a controlled route for leaking gas to escape, preventing direct accumulation on the abutting surface while avoiding the need to increase the screwing portion length.

Inventive Principle:
Principle #24Intermediary (Mediator)

2Reliability

If the tightening force is increased to prevent gas leakage, then the sealing performance is improved, but the load on the lid-like member increases

Engineering Contradiction:
Improvesealing performanceVSAvoidload on lid-like member
Core Design Contradiction:
ReliabilityVSForce

Solution Approach 1:

The patent converts the harmful effect of leaking gas (which would accumulate and increase load) into a beneficial discharge mechanism. By providing a communication path to the external environment, the leaking gas is redirected to escape safely, preventing load increase while maintaining sealing performance through the existing thread connection.

Inventive Principle:
Principle #22Blessing in disguise (Convert harm into benefit)

3Reliability

If the screwing length is increased to address gas leakage, then the sealing reliability is improved, but the storage volume decreases

Engineering Contradiction:
Improvesealing reliabilityVSAvoidstorage volume
Core Design Contradiction:
ReliabilityVSVolume of stationary object

Solution Approach 1:

The patent extracts the leaking gas from the closed system through a communication path that connects the abutting surface to the external environment via a discharge opening. This allows the system to maintain shorter screwing length while still addressing gas leakage issues, thereby preserving storage volume.

Inventive Principle:
Principle #2Taking out (Extraction)

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 communicating path effectively discharges leaking gas, preventing load accumulation on the lid-like member and maintaining storage capacity by allowing gas to escape externally, thereby addressing the issue of gas leakage without compromising storage volume.

Implementation Method 1

a communicating path that allows the abutting surface of the lid-like member to communicate with an outside of the high-pressure tank

Methodology Applied
Scientific EffectGas flow:

Data Source

PatentUS11635168B2High-pressure tank
Publication Date: 2023.04.25 TOYOTA JIDOSHA KK
  • US11635168B2 patent drawing
  • US11635168B2 patent drawing
  • US11635168B2 patent drawing

AI summary

A high-pressure tank for storing a gas includes: a liner having a cylindrical opening; a reinforcing layer covering the liner; a mouthpiece including an external thread portion on an outer periphery thereof and externally fixed to the reinforcing layer covering the opening; a manifold including an inserted portion to be inserted into the opening so as to close the opening, an abutting surface configured to abut on an end face of the opening, and an internal thread portion on an inner periphery thereof to be screwed into the external thread portion of the mouthpiece; and a communicating path that allows the abutting surface of the manifold to communicate with an outside of the high-pressure tank.