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Hydraulic quick release fitting is a kind of quick loading and unloading joint without tools. It has two types of structure: open and closed at both ends and open and closed at both ends. The lock sleeve of hydraulic quick joint is processed by work hardening problem, good pressure resistance and fatigue resistance, using a two-stage seal; No leakage, with safety self-locking function.
Open and close quick connector at both ends is composed of connector body, one-way valve spool, sheath, steel ball, spring and seal. The joint body cavity has a check valve. When the two joint body separated, the valve spool of the one-way valve extends out under the action of their respective springs, pressing on the conical hole of the joint body, so that the channel is closed, the oil in the pipeline on both sides is sealed, and can not flow out; When the two connecting bodies are connected, the two mandrel at the front end of the check valve spool collide, forcing the spool to leave the conical hole of the connecting body, so that the oil in the pipeline on both sides is connected, and the two connecting bodies are locked with a steel ball. When working, the coat presses the steel ball into the U-shaped slot of the connector body under the action of the spring to connect the connector body.
This way of joint disassembly is convenient, but the structure is more complex, local development resistance loss risk is greater, suitable for oil and gas as the medium of pipeline management system.
The only difference between open and closed joints is that there is no one-way valve in the cavity of the joint body. When two different joint bodies are separated, the path cannot be completely closed. One end of the joint is connected with the hose by the three-valve hose joint, and the joint core of the hose joint is directly inserted into the joint.