Abstract:Common structures and types of hydraulic joints an...
Common structures and types of hydraulic joints and what preparations need to be made before use
Hydraulic joints are detachable connections between oil pipes and oil pipes, oil pipes and hydraulic components. They are used in various fields and have various types. The types of pipe joints in different fields may also be different, and the functions they play are also different. Quick change joints, one with check valve and one without check valve. For applications with one-way valves, the one-way valve end is connected to the air source. When it is disconnected, the one-way valve will automatically close. When it is connected, the thimble at the movable end will open the one-way valve. Self-locking is to use steel balls embedded in the groove, and at the same time, the steel balls are locked by the "cone-cylindrical" sleeve.
In order to meet the requirements of practical application efficiency, it should meet the requirements of convenient assembly and disassembly, firm connection, reliable sealing, small size, strong oil passage performance, small pressure loss, and good processing technology.
In practical applications, there are mainly welding type, ferrule type, flare type, buckle type and other forms; in each form of pipe joints, there are straight-through, right-angle, three-way and other types according to the number and direction of the joints; the connection with the body The connection methods include screw connection, flange connection and so on. In addition, there are some fittings for special purposes.
NPTF taper thread fitting: This is a dry seal thread; it is a domestic taper pipe thread used for fuel delivery, and can be used for both male and female threaded end fittings. NPTF male threads can mate with NPTF, NPSF or NPSM female threads. NPTF fittings are similar to, but not interchangeable with, BSPT fittings, most sizes have threads with a different pitch and a 60° profile angle, while BSPT threads have a 55° profile angle.
Flared pipe joint: This type of pipe joint has two structural forms, type A and type B: type A consists of a pipe joint body 1 with a 74° outer cone surface, a nut 2 for compression, and a 60° inner cone Hole sleeve 3; Type B consists of a joint body 1 with a 90° outer taper and a nut 2 with a 90° inner taper hole.
A series of work that needs to be done before the purchase and installation of structural parts to be put into use is to ensure that they can be effectively used and exert higher application efficiency. If there is a problem during the installation process, the consequences will be very serious and directly affect its normal operation. The hydraulic joint is no exception. In the hydraulic system, whether it is a metal pipe joint or a hose joint, there are problems that are prone to leakage. Even if the performance of the product is sufficiently guaranteed, the preparatory work that should be done cannot be omitted. To this end, we should pay attention to the handling of the following normative matters:
1. Carefully read the product instruction manual. For the installation of hydraulic joint manufacturers, people need to carefully read their product manuals, and operators cannot rashly install new tools based on past work experience. Since the production technology and production equipment of different manufacturers are different, there is a big difference in the structure and structure of the products they provide. Therefore, in order to prevent mistakes during the installation process, people need to strictly follow the steps in the instruction manual.
2. Before formally installing the hydraulic joint, carefully check whether the various parts of the foaming product are damaged. Especially the parts of screws or bolts, as long as there is a problem with a certain part, it must be replaced with a new part in time. Carefully check whether the product has rust spots, cracks, deformation and other defects, and whether the surface size meets the requirements.
3. Pay attention to the direction when installing. Some parts are directional, if you do not pay attention, it will hinder the use after installation, and even damage the hydraulic joints.
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