Insulating Separating Valve for Electrostatic Coating Leakage Prevention
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Solution Overview
Problem
Conventional electrostatic coating apparatuses face challenges in preventing current leakage, efficiently cleaning the coating material supply path, and rapidly discharging residual electric charges, leading to prolonged air blow times and potential damage from cleaning fluids.
Innovation Solution
The electrostatic coating apparatus incorporates an insulating and separating valve with a female and male coupling member design, featuring a cleaning fluid supply and discharge path on the non-application side to prevent leakage, and a mechanism for rapid electric charge discharge using a conductive fluid pathway.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the insulating and separating valve is connected in the coating material supplying path to prevent current leakage, then current leakage is prevented, but the cleaning process becomes complex and time-consuming
Solution Approach 1:
The valve body is divided into a first valve body and a second valve body that can be separated from each other. The cleaning fluid supply path and discharge path are configured in the second valve body, allowing cleaning to be performed independently when the valve bodies are separated, thus simplifying the cleaning process while maintaining current leakage prevention during coating operation
Solution Approach 2:
The cleaning fluid supply path and discharge path are pre-configured in the valve structure. Before cleaning is needed, the pathways are already in place, and the valve can be quickly separated to access these pathways for cleaning, eliminating the need for complex disassembly procedures
2Reliability
If plenty of time is allocated for air blow to remove cleaning fluid, then current leakage is prevented, but productivity is reduced
Solution Approach 1:
The cleaning fluid discharge path is extracted and configured separately in the second valve body. This allows cleaning fluid to be discharged efficiently through a dedicated pathway, reducing the time required for air blow and subsequent drying operations, thereby maintaining reliability while improving productivity
3Productivity
If the insulating and separating valve is connected immediately after coating for cleaning, then cleaning efficiency is improved, but discharge or heat generation occurs causing potential damage
Solution Approach 1:
A grounding mechanism is introduced as an intermediary between the valve and the grounding body. This grounding mechanism safely dissipates residual electric charges through a controlled pathway before cleaning begins, preventing discharge and heat generation during the cleaning operation while allowing immediate connection for efficient cleaning
4Ease of operation
If two cylinders are used to form clearance for cleaning solution supply, then cleaning access is improved, but the cleaning solution pressure causes member displacement and leakage
Solution Approach 1:
The valve bodies are designed to be dynamically separable and reconfigurable. The first and second valve bodies can be moved relative to each other to create clearance for cleaning fluid supply, and then reconnected to restore sealing. This dynamic configuration allows cleaning access without compromising the sealing force during coating operation
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
This design effectively prevents current leakage, simplifies the air blow process, ensures thorough cleaning without residual material, and rapidly discharges electric charges, enhancing coating efficiency and product quality.
Implementation Method 1
a cleaning fluid supply path extending from a supply port toward a discharge port
Implementation Method 2
an insulating and separating valve for temporarily dividing the coating material supplying path to bring an electrical insulating state
Implementation Method 3
a high voltage is applied to the electrically conductive coating material supplied to a coating gun
Data Source
AI summary
In an electrostatic coating apparatus, an electrically conductive coating material is supplied through a coating material supplying path to a coating gun to which a high voltage is applied. The electrostatic coating apparatus is provided with an insulating and separating valve capable of electrically insulating and separating the coating material supplying path into an application side in which the high voltage is applied and a non-application side. The insulating and separating valve is provided with a female coupling member having a first connecting portion and a male coupling member having a second connecting portion. A supplying hole for supplying a cleaning fluid to the first connecting portion and the second connecting portion and a discharging hole for discharging the cleaning fluid supplied to the first connecting portion and the second connecting portion are provided on one of the female coupling member disposed on the non-application side and the male coupling member.