Electrical Pipeline Threading Take-Up Sensing for Timely Driver Shutdown
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Solution Overview
Problem
Existing threading devices for building electrical pipelines require high tightening force to trigger the microswitch, leading to potential damage and delayed driver shutdown, as the strong wire needs significant force to induce transverse movement and trigger the microswitch, increasing the risk of driver damage.
Innovation Solution
A threading device with a take-up state induction mechanism comprising a bent pipe converging device, a rotating shaft, a lifting spring, and a microswitch in the ventilation bin, where the bent pipe converging device rotates with the strong wire tension to disconnect the power supply to the wire wheel driving device, preventing damage and allowing automatic reset when the wire is loosened.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the strong wire applies large tightening force to trigger the microswitch, then the wire wheel can be driven to transverse move and close the driver, but the risk of driver damage increases
Solution Approach 1:
The patent introduces a wire wheel as an intermediary mechanism between the strong wire and the microswitch. The wire wheel converts the longitudinal tightening force of the strong wire into transverse movement through its spiral groove structure, allowing the microswitch to be triggered with reduced force requirements. This mediator mechanism resolves the contradiction by enabling reliable driver shutdown without requiring excessive tightening force that would damage the driver.
Solution Approach 2:
The patent changes the parameter of force transmission by using a spiral groove structure on the wire wheel. Instead of direct force transmission from the strong wire to the microswitch, the spiral groove transforms the force vector and magnitude, allowing the microswitch to be triggered at optimal force levels that prevent driver damage while ensuring reliable shutdown.
2Reliability
If the strong wire generates large transverse movement to trigger the microswitch, then the driver can be closed, but the tightening force required increases
Solution Approach 1:
The wire wheel acts as a mechanical intermediary that converts longitudinal wire tension into transverse motion. The spiral groove geometry provides a mechanical advantage that amplifies the transverse movement component while reducing the required tightening force, thereby resolving the contradiction between reliable microswitch triggering and excessive force requirements.
Solution Approach 2:
The wire wheel introduces dynamic motion transformation, converting the static or linear tightening force into rotational and transverse movements. This dynamic mechanism allows the system to achieve the required transverse displacement for microswitch triggering with reduced force input compared to a direct mechanical linkage.
3Productivity
If the driver operates continuously during wire tightening, then the threading process can be maintained, but the driver is prone to damage from excessive force
Solution Approach 1:
The patent implements a feedback mechanism through the microswitch that detects when the wire wheel has moved transversely to its stopping position. This feedback signal automatically controls the driver operation, allowing continuous threading while preventing excessive force application that would damage the driver. The system self-regulates based on the mechanical position feedback from the wire wheel-microswitch interaction.
Solution Approach 2:
The wire wheel mechanism provides self-service protection for the driver by automatically triggering the microswitch when the strong wire reaches the appropriate tension level. This self-regulating mechanism eliminates the need for external force monitoring while protecting the driver from damage, maintaining both productivity and reliability.
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 device ensures timely disconnection of the power supply to the wire wheel driving device during strong wire tightening, preventing damage and allowing for automatic recovery of the take-up state when the wire is loosened, enhancing operational safety and efficiency.
Implementation Method 1
a bent pipe converging device lifting spring arranged on the first rotating shaft; when the strong wire is loosened, the bent pipe converging device is driven by the bent pipe converging device lifting spring to reset
Data Source
AI summary
Disclosed is a threading device suitable for a building electrical pipeline. The threading device comprises a fan, a take-up and pay-off main machine and a connecting hose. A take-up state induction mechanism mainly composed of a bent pipe converging device, a first rotating shaft, a bent pipe converging device lifting spring and a first microswitch is creatively arranged in a ventilation bin. When a strong wire is tightened, the bent pipe converging device is easy to rotate along with tightening of the strong wire, and the strong wire makes contact with the first microswitch in time when being tightened. After the strong wire is loosened, the bent pipe converging device can automatically return under the action of the bent pipe converging device lifting spring, and the take-up state of a wire wheel is recovered.