Pipe joint use of cutting sleeve type ( 3)

pipe connector of cutting sleeve type has the advantages of simple structure, convenient use and no welding. But in high pressure hydraulic system, if improper operation often can cause leakage, affect the promotion of use. The author summarizes some experience, after many years of practice, good results have been achieved. As shown in the appended drawings, pipe connector of cutting sleeve type is mainly composed of a taper hole of the connector body, with sharp blade, compression set and the function of gland nut of three parts. Screw nut, the card sets was advance degree and then the deformation in the cone hole, the card sets of contact with the formation of spherical joints in the body cone sealing; At the same time, the card sets the inner edge of the walls of the embedded steel tube, the outer wall of a circular groove, thus reliable sealing effect. Steel tube had better choose # of eliminating stress annealing tube drawing, this is advantageous to the card within the set of edges embedded steel pipe outside surface, reliable sealing effect. （ ) With (1) of the pipe connector of cutting sleeve type has the pre-installed is one of the most important link, directly affect the reliability of the seal. General need special pre-installed. Pipe diameter small joint can be pre-installed on the vise. Particular way is to use a joint body as a matrix, the nut, card sets of pressure to the pipe. Straight pipe connector of cutting sleeve type, main side of cutting sleeve type has the straight through to the head, t-pipe connector of cutting sleeve type has the pattern, etc. The author found that even with a batch of goods of the same manufacturer, the several joint on the depth of the taper hole is often not the same, as a result, the leakage, and the problem often ignored. The correct approach is, what the pipe end joint connection, the connection end of the corresponding pre-loaded with the same type of joint, such can utmost ground to avoid leakage problem. (2) the pipe end should be flush. Saw pipe leveled, final should be on the tools such as grinding wheel for grinding and deburring, reoccupy after cleaning by high pressure air blowing off. (3) installed, should try to keep the tube and the connector body alignment, if the pipe deviation is too large will cause the seal failure. (4) preloaded force shoulds not be too big. Should keep card sets of embedded within the blade just outside the pipe wall, card sets should not have obvious deformation. In the pipeline connection again, in accordance with the provisions of tight assembly force. φ- Tighten force for - mm ferrule N, from MMR N, mm for N. If the pre-installed ferrule deformation is serious, will lose the sealing function. （ ） Banned from sealant and so on packing. Someone in order to achieve better sealing effect, apply sealant in the card case, the sealant was rushed into the hydraulic system, the fault of hydraulic components damping hole jam. （ ） When connecting line, should make the pipe has enough deformation allowance, avoid tensile stress to the pipe. （ ） Connecting line, should avoid to make the side force, lateral force will cause the untight seal. （ ） When connecting line, should one-time good tight, avoid disassemble for many times, also can make the sealing performance variation. Keywords:
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