Bladder-type pressure tank and preparation method thereof
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Solution Overview
Problem
Conventional bladder-type pressure tanks with steel outer shells and rubber bladders suffer from corrosion and fragility, failing to provide adequate compressive strength, durability, and extended service life.
Innovation Solution
A bladder-type pressure tank with a polyethylene liner, a glass-fiber reinforced outer shell, and a polyurethane bladder, featuring an integrated nozzle and elbow pipe design, along with a gap between the bladder and liner for water passage, enhancing sealing and compressive strength while ensuring corrosion resistance and ease of assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If steel outer shell and rubber bladder are used in conventional bladder-type pressure tanks, then the tank can provide basic pressure buffering function, but the steel outer shell becomes corrosive and the rubber bladder becomes fragile
Solution Approach 1:
The patent applies composite materials by combining polyethylene liner with glass-fiber reinforced outer shell. The polyethylene liner provides corrosion resistance while the glass-fiber reinforced shell provides mechanical strength, eliminating the corrosion and fragility issues of conventional steel and rubber materials.
Solution Approach 2:
The patent changes the material parameters from conventional steel and rubber to polyethylene and glass-fiber reinforced composite materials. This material substitution fundamentally changes the chemical and mechanical properties, providing both corrosion resistance and structural integrity simultaneously.
2Strength
If glass-fiber reinforced outer shell and polyethylene liner are used, then compressive strength and corrosion resistance are improved, but the structural complexity increases
Solution Approach 1:
The patent segments the pressure tank structure into distinct functional layers: an inner polyethylene liner for corrosion resistance and fluid containment, and an outer glass-fiber reinforced shell for mechanical strength. This segmentation allows each layer to optimize its specific function without compromising the other.
Solution Approach 2:
The glass-fiber reinforced composite material combines multiple materials (glass fibers and resin matrix) to achieve superior compressive strength while maintaining a relatively simple overall tank structure. The composite material itself provides both structural integrity and corrosion resistance.
3Duration of action of moving object
If rubber bladder is used in conventional pressure tanks, then the bladder can expand and contract for pressure buffering, but the rubber material becomes fragile and reduces service life
Solution Approach 1:
The patent changes the bladder material from rubber to polyethylene, fundamentally altering the material parameters. Polyethylene provides comparable elasticity for pressure buffering while offering superior resistance to degradation, aging, and fragility, thereby extending service life.
Solution Approach 2:
The patent discards the conventional rubber material that becomes fragile over time and recovers the pressure buffering function through polyethylene, which maintains its mechanical properties and flexibility throughout the extended service life of the tank.
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 provides a bladder-type pressure tank with improved compressive strength, corrosion resistance, durability, and extended service life, effectively buffering pressure fluctuations and providing stable water supply while maintaining a clean and lightweight structure.
Implementation Method 1
the outer shell comprises a liner and a glass-fiber layer covering an outer surface of the liner; the liner comprises polyethylene (PE)
Implementation Method 2
the bladder comprises polyurethane (PU); When the water flows out and the water pressure decreases, the air pressure in the bladder-type pressure tank is greater than the water pressure. Thus, the air expands to extrude the water in the bladder-type pressure tank until the air pressure and the water pressure are balanced
Implementation Method 3
the nozzle is integrated with the bladder, and is disposed in the first opening and seals the first opening
Implementation Method 4
the first end of the elbow pipe is disposed in the second opening and communicates with the chamber; and the second end of the elbow pipe is configured to connect to a pipeline
Implementation Method 5
The bladder-type pressure tank is mainly used to buffer pressure fluctuations in a pipeline system and provide water to the pipeline
Data Source
AI summary
A bladder-type pressure tank includes an outer shell, a bladder, a nozzle, and an elbow pipe. The outer shell includes a liner and a glass-fiber layer covering the outer surface of the liner. The liner includes polyethylene (PE). The liner further includes a chamber, a first opening, and a second opening. The bladder is disposed in the chamber. In an inflated state of the bladder, a gap is formed between the inflated bladder and the inner surface of the liner. The bladder includes polyurethane (PU). The nozzle is integrated with the bladder, and is disposed in the first opening and seals the first opening. The elbow pipe includes a first end and a second end. The first end of the elbow pipe is disposed in the second opening and communicates with the chamber; and the second end of the elbow pipe is configured to connect to a pipeline.