Transcript Pet Waterer and IV drip

The Pet Waterer
FluiDivas
Lindsey Ehinger, Laura Mar,
Stephanie Wedekind, Kimberly
Wilson
CEE 454 Design Project
Objectives
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Produce a constant head
Maintain a constant flow
Allow the operator to change the flow rate to
achieve the desired rate of flow
Function independent of the application
Materials should be compatible with
chemicals like chlorine and alum, etc.
Simple to use and maintain
Our Inspiration: Pet Self-Waterer
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Holds 3L of water
Airtight seal
Maintains constant supply
of water in the dish for pets
when the owner is away!
When the water in the dish
rises to the level of the
feedhole, flow stops.
Design Goals
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Constant flow into and out
of the waterer to make refilling the tank easy
Connect the tank to an elevated raw water
supply
Allow the water in the dish to feed vertically
downward into the desired POU system
Maintain a vacuum inside the tank
Our Design
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Two additional holes drilled into the tank. One hole controlled by a
valve that will allow water from the elevated storage tank to refill
the water tank. The air hole will let air out of the tank when the
water tank is being refilled.
A third hole drilled into the bottom of the dish. Small flexible tubing
equipped with an IV drip roller feeds out of this hole.
The IV drip roller provides constant and adjustable flow into a POU
system of interest.
Plugs inserted at the feed hole and the air hole to maintain vacuum
inside the water tank during refill
Dimensions
Operation
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Filling tank up
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Place plug in feed hole
Open air plug and valve
Close valve and air plug when water level in tank
is a couple centimeters from the top
Remove plug from feed hole
Wash hands when finished
Maintenance
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Particles will clog the IV and reduce the flow
Unclogging the IV valve—every 1-2 hours
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Open and close the IV valve until water is flowing
out of the tubing
Re-open the IV valve to the correctly marked
place and adjust to a flow rate of 13 mL/min
Maintenance
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Cleaning the system
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Make sure valve is closed
Detach pet waterer system from storage tank
Remove pet tank and wash with clean water to
remove sediment
Wash trough with clean water
Reassemble system
Wash hands with clean water
Experimental Procedures
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Goal:
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Determine if there was a constant flow
rate
Effect and time of clogging
Clean and dirty water trials
Measured flow rate over several hours
Flow was measure using a watch and a
graduated cylinder
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Accurate enough for application
Used in practice
Simple
Clean Water Trial
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Ran 2 trials. Results
similar.
In longer second trial
(130 minutes) flow rate
fluctuated between 0.18
to 0.16 ml/sec
Decrease not
significant
Clean Water Trial 2
0.25
Flow Rate (ml/sec)
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0.2
0.15
0.1
0.05
0
0
20
40
60
80
Time Elapsed (minutes)
100
120
Dirty Water Results
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Cayuga Lake
sediment and
tap water (~ 100
NTU)
Trial 1: 23 hours,
start with clean
system
Trial 2: 2 hours,
no cleaning
Significant
Decrease over
Time
Dirty Water Trial 1
start with clean system
0.25
Flow Rate (ml/sec)
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0.2
0.15
0.1
0.05
0
0
2
4
6
8
10
12
14
16
Time Elapsed (hours)
18
20
22
24
Design Benefits
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Control flow by maintaining a constant head
Easy to use
Little maintenance: cleaning requires moving roller to clear the
tube of any obstructions
Materials: common, inexpensive, durable, one time cost.
Prototype: $32.44
Flow is adjustable
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Increase Demand
Varying Influent Characteristics
Flexibility of the system
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Alum/Chlorine Feed
Design Flaws
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Need for refilling every few hours
IV roller has no quantifiable settings
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Changes in the roller setting and the location of
the roller on the tube both affect the flow rate
How will the user measure and maintain a
constant flow rate?
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Suggest marked container and stop watch
Recommended Modifications
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Build a similar device using the same
principles but different materials
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a large plastic bucket attached to a paint tray with
an IV
Use a large pet waterer as originally
designed
Neither device requires refilling
Further Research
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Use filtration screen or cloth to prevent clogs
More data needed to determine rate and
method of clogging
Determine how often IV roller should be
adjusted to maintain constant flow
Determine how often system requires
cleaning
Conclusion
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With a few slight modifications, our design is
a simple, effective device that provides a
constant flow rate for a variety of applications