One-Piece Tapping Point Clearing Tool for Stable Process Measurement

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Solution Overview

Problem

Existing tapping point clearing apparatuses face issues such as loosening from shaft attachments due to vibration and temperature fluctuations, contamination from thread lock/sealant erosion, and premature failure of wiper rings, leading to inaccurate process measurements and potential contamination of process fluids.

Innovation Solution

A one-piece clearing tool with a permanently attached shaft and head, combined with a composite wiper ring having a resilient material to compensate for temperature fluctuations and a clearing head with increased openings for purge fluid flow, and an inclined installation to minimize purge fluid dilution and maintain accurate measurements.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If a clearing tool is attached to a shaft using thread attachment, then the clearing tool can be installed and removed easily, but the clearing tool loosens and unscrews from the shaft due to vibration, temperature fluctuations, and high velocity impacts

Engineering Contradiction:

Improveinstallation and removal of clearing toolVSAvoidattachment stability of clearing tool

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The clearing tool and shaft are merged into a single permanently attached unit, eliminating the thread attachment interface that was prone to loosening. This integration ensures the clearing tool remains securely attached during vibration, temperature fluctuations, and high velocity impacts while maintaining reliable operation.

Inventive Principle:

Principle #5Merging (Combining)

2Reliability

If thread lock or sealant is used to prevent clearing tool loosening, then the attachment stability improves, but the thread lock/sealant erodes in harsh environments and contaminates the process solution

Engineering Contradiction:

Improveattachment stabilityVSAvoidcontamination of process solution

Core Design Contradiction:

ReliabilityVSObject-generated harmful factors

Solution Approach 1:

The harmful thread lock/sealant substance is completely removed from the system by using a permanently attached clearing tool design. This eliminates the source of contamination while maintaining attachment stability through permanent integration rather than removable fastening mechanisms.

Inventive Principle:

Principle #2Taking out (Extraction)

3Duration of action of stationary object

If a purge fluid is introduced through the tapping point to delay blocking, then the tapping point clearance is maintained for longer, but a large amount of inert media is added to the process fluid that must be extracted at significant expense

Engineering Contradiction:

Improvetapping point clearance durationVSAvoidinert media in process fluid

Core Design Contradiction:

Duration of action of stationary objectVSLoss of substance

Solution Approach 1:

The clearing tool performs preliminary clearing action by mechanically removing scale and debris buildup from the tapping point before it can block the flow. This preventive mechanical clearing eliminates the need for continuous purge fluid introduction, maintaining tapping point clearance without adding inert media to the process fluid.

Inventive Principle:

Principle #10Preliminary action

4Duration of action of stationary object

If larger diameter tapping points are used to slow blockage, then the time taken to block is extended, but the installation cost increases and the blockage issue is merely delayed

Engineering Contradiction:

Improvetapping point clearance durationVSAvoidinstallation cost

Core Design Contradiction:

Duration of action of stationary objectVSEase of manufacture

Solution Approach 1:

The clearing tool performs preliminary mechanical removal of scale and debris that would otherwise accumulate and block the tapping point. This active clearing mechanism allows the use of conventional-sized tapping points while maintaining long-term clearance, avoiding the need for expensive oversized installations.

Inventive Principle:

Principle #10Preliminary action

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 ensures secure attachment of the clearing tool, reduces contamination risks, maintains accurate process measurements, and minimizes purge fluid dilution, thereby extending the life cycle of the apparatus and improving process efficiency.

Implementation Method 1

a composite wiper ring having a resilient material to compensate for temperature fluctuations

Methodology Applied

Scientific EffectElasticity: Elasticity

Data Source

PatentUS12350722B2Tapping point clearing apparatus

Publication Date: 2025.07.08 CLEARGUARD IPCO PTY LTD

AI summary

A clearing head 10 includes annular scraper edge (12) and rows of openings (14, 16). A clearing tool (100) has a one-piece combined shaft (24) and clearing head (10). Wiper ring (49) includes inner first material 49a around an opening (49c) for the shaft (24). The first material may have molybdenum/molybdenum disulphide. A resilient second material 49b is provided around the first material. The resilient second material is or includes FKM. In a ram (38), the resilient second material can exert inward radial pressure to the first material by reacting against a ram interior wall (39). The ram can incline from horizontal and vertical by an angle α e.g. between at least 10° and 80°, or between at least 20° and 70°, or between at least 30° and 60°, or between at least 25° and 45°, or around 30°.