Principle of stainless steel quick connector

The cam and groove is a kind of quick connection device, which is used for the delivery of liquid, which is composed of external thread and internal thread. Generally, the outside of the male header has a concave surface (groove). When connecting, the groove is just stuck with the handle of the inner screw head, so that the two ends of the washer are tightly combined to achieve the sealing effect. Such joints are common in petroleum and chemical fields.


Quick connection is generally called: lock arm type quick connection, wrench type quick connection, lifting ring type quick connection, quick connection type has → a, b, c, d, e, f, dc, dp according to any combination of equipment, size Generally, it is 1/2-6", and it can also have different specifications according to customer requirements. The materials are brass, stainless steel, aluminum alloy, polypropylene and other materials. The guillemot is a symmetrical structure, which is obtained in the field of fire protection in France and Belgium. It has a wide range of applications. It is also sometimes called a dsp connector. You can tighten it by hand or with a wrench. A fire hose is a high pressure water hose that delivers water or foam.






Outdoors, it is usually mounted on a fire truck or hydrant. Indoors, it can be permanently connected to the building's pump system. The normal working pressure of the fire hose is 8bar-20bar (0.8-2.0 mpa or 100-300psi), and the burst pressure is 83bar (8.3 mpa or 1200psi). This pressure can hit fragile brick walls. After use, the hose should be hung dry as long-term residual water droplets in the hose can damage the material. Therefore, fire stations are usually equipped with taller buildings to maintain such long water pipes.


According to the structure, the quick stainless steel joint can be divided into double-ended opening and closing type, double-ended opening and closing type and single-ended opening and closing type. When the ferrule moves to the other end, the stainless steel ball rolls out automatically. Due to the common spring force between parent and child, the child and parent's valves are closed separately, and the child's valve immediately blocks the flow of fluid. Connection: When the daughter body is inserted into the mother body, the ring is under the action of the spring, the ball tightly locks the daughter body, and the mother valve and the daughter valve are pushed apart from each other, the fluid flows, and the o-ring completely blocks the fluid flow.


Start quick connect, no connection: When the female ring is pushed to the other end, the ball rolls out automatically, so the daughter is removed, and the liquid flows out because there is no valve between the daughter and the mother. When connected: When the daughter body is inserted into the mother body, the daughter body is pushed to the previous position due to the action of the spring, causing the steel ball to lock and the fluid to flow, one of the o-rings prevents liquid leakage, not connected: When the mother ring moves to the other At one end, the stainless steel ball rolls outward automatically, and the sub-body spring is opened by the reaction of the valve spring, and automatically closes to stop the flow.