Connection and sealing method of high pressure steel wire braided hose时间：2022-05-17浏览次数：1032
When the high-pressure steel wire braided hose joint is matched with other equipment, ensuring the sealing between the hydraulic hose and the rubber hose is a key step. Let's take a brief look at the connection form of the high-pressure hose and the precautions for conical sealing.
1、 Hose joints can be roughly divided into internal threads and external threads.
1) Internal thread form
This structure is generally suitable for occasions with relatively low working pressure and large flow. This connection allows the diameter of the hose to be appropriately increased, and its tightness mainly depends on the sealing ring. The internal and external threads of the quick connector can only be connected with the rubber hose after using the transition joint or adapter.
2) External thread form
This structure is mainly used under high pressure, especially when the working pressure exceeds 1800bar. In this connection mode, the lock nut is pressed by the external thread connector, so that the conical sealing surface of the pipe section closely fits the sealing surface of the connector, playing a sealing role. The connected parts can also be spraying accessories, such as high-pressure spray gun, plane cleaning nozzle, three-dimensional rotating nozzle, etc. this connection method can effectively prevent the connection from loosening under complex construction conditions.
2、 Precautions for conical seal of high pressure steel wire braided hose assembly
1) The taper angle of this connection is 60 degrees, and the taper angle of the pipe end is generally less than 1 degree of the taper angle of the hole;
2) The position of the pipe end must be kept sharp and not blunt;
3) The thread direction between the pipe end and the lock nut should be opposite to the external thread joint;
4) When processing joints, drainage holes should be reserved at the sealing place to prevent high-pressure water from leaking out when the conical surface is not tightly sealed. This can not only serve as a safety warning, but also facilitate observation and judgment, so as to better protect the sealing surface from damage.
No matter there are many kinds of high-pressure steel wire braided hose joints, we should choose how to use the transition joint according to the type of hose joint. If the hose is an ordinary water pipe, it is necessary to use a transition joint, one end of the internal tooth, one end of the water pipe, and then fix it with a hose clamp. If both ends of the hose are internal teeth, transition joints should be used to connect, one internal tooth and one external tooth. If both ends of the hose are external teeth, they must be connected with transition joints and internal teeth.