Active Control Mechanism Drawing

Context

Outlet Structure: Head Wall 

The outlet structure dimensional ratios were calculated using the Kentucky 2025 Standard Headwall Drawings (Kentucky Transportation Cabinet, n.d.). These dimensions were scaled down by a factor of 10 to generate a small version of our model. This scale will be adjusted as the size for our outlet structures for each detention basin are finalized. 

In our final design, the head walls on both structures will help minimize erosion as water flows into the outlet pipe. The design includes a circular pipe culvert to control flow out of each detention basin because circular culverts are most commonly used in Kentucky (Kentucky Transportation Cabinet, n.d.).

Motor and Gear 

The active control mechanism is powered by a N20 5V DC Gearbox Motor and controlled by a small, circular gear. The motor will reside in a casing inside the Motor Box (labelled part in the Active Control Assembly Drawing). The motor will be connected to a circuit, rotating it clockwise or counterclockwise at designated times depending on the storm situation being modeled. The motor is directly attached to the gear through the Motor Box, so the gear will rotate the same direction as the motor. The motor will be programmed to fit the situations described in the excel calculator deliverable. 

Garage Door and Slider 

The garage door is the foundation of the active control mechanism design. One side of the garage door has teeth that fit into the gear as it rotates. When viewing the assembly from the back view, the garage door opens when the gear rotates clockwise and closes when the gear rotates counterclockwise. Design discussions with Dr. McMaine have indicated that a garage door that opens and closes from the top of the outlet structure will be most effective and least intrusive. 

A primary goal of this design was to ensure that no water will exit the outlet structure when the garage door is closed. This was accomplished by incorporating a slider on the garage door that fits exactly into an equally sized indent in the main body of the head wall. This slider keeps the garage door flush to the head wall, so there is no unintentional leakage into the watershed. 

References 

Kentucky Transportation Cabinet. (n.d.). DR 600 Culverts [PDF]. Retrieved from https://transportation.ky.gov/Highway-Design/Drainage%20Manual/DR%20600%20Culverts.pdf Kentucky Transportation Cabinet (n.d). Pipe Culvert Headwalls, 0° Skew (Layout and Steel Pattern) [PDF]. Retrieved from https://transportation.ky.gov/Highway-Design/Standard%20Drawings%20%20Sepias%20PDFs %202012/erdh110.pdf