英语
俄语
What is a hose coupling?
1. Essentially: The "iron-clad throat clamp" of a hose
Hoses are inherently flexible: Rubber/plastic tubes lack rigidity, and if the coupling isn't locked in place, it will release and spray fluid upon application of pressure.
couplings perform two functions:
Locking the throat: The metal barbed teeth penetrate the inner wall of the hose, becoming deeper and deeper with each pull (barb principle).
Sealing: The metal barb deforms the tube wall, filling gaps and preventing leaks and collapse.
2. Three Key Structural Features
| Component | Function | Field Failure Nightmare |
|---|---|---|
| Barbed Stem | Metal spike with reverse hooks → JAMS inside hose liner | Shallow barbs → hose blows off at 100 PSI → toxic shower |
| Compression Sleeve | Outer metal ring → CRUSHED onto hose with bolts | Loose bolts → slow weep → 3 years of drips ruining concrete |
| Sealing Washer | Rubber gasket stuffed between joints | Hardened with age → chronic drip → "indoor rain" |
3. Four Major Schools of couplings
| Type | Brutality | Domination | Self-Destruct Moves |
|---|---|---|---|
| Threaded Coupling | Pipe ← cut MALE threadsCoupling ← FEMALE threads | Cheap & high-pressure | Wrong thread pitch → teflon tape mummy wrap |
| Camlock Coupling | Cam lever JAMS lugs into slots | Connects knee-deep in mud | Hook to air line → lever ejects like shrapnel |
| Push-to-Connect | Spring collet LOCK on insertion | One-handed ninja moves | Rust-seized collar → machete rescue |
| Flange Coupling | Bolt two iron pancakes together | 1000 PSI+ brute force | Miss one bolt → rainbow of death |
4. Life-threatening taboos (a compilation of blood and tears).
Using smooth couplings in negative pressure systems: Air intrusion during suction → Pump cavitation and explosion.
Using plastic couplings on high-pressure hoses: 3 bar pressure can cause head explosions, plastic shards can pierce eyes.
Chemical plants saved on gaskets: Nitrile rubber rings swell when exposed to benzene → Poison leaks into pants.
Auto repair shops spray WD-40 recklessly: The solvent corrodes. rubber hoses → Brake hoses burst while driving.
5. Unspoken rules of couplings
Agricultural irrigation: Plastic barbed coupling + wire ferrule → Cheap, bursts → Cheap, no worries if a ferrule bursts.
Tank unloading: Aluminum alloy cam lock + static jumper cable → Explosion-proof and anti-detachment.
Fire hose: Brass quick-connect fittings → Kick in, punch out.
Laboratory: Teflon quick-twist fittings → Leak if overtightened, and feel more delicate than first love.
