Oil field special high-pressure pneumatic valve gate technology is introduced

now our factory production of wellhead pneumatic valve product percent of pass is up to more than %. Through the above a series of effective measures and quality control.
brake in the process of the pneumatic valve manufacturing, oil extraction wellhead ( Christmas tree with brake pneumatic valve pneumatic valve is one of the largest specialized brake oil consumption. Pneumatic valve body hydrostatic strength test and sealing test qualified rate is too low, % % and temporary facilities. Combining with our actual production, the above problem was analyzed, and solutions are put forward.
blank casting process improvement
the process of pneumatic valve, pneumatic valve factory wellhead gate using sand mold casting blank. With pneumatic seat often occurs with internal thread of the hole, the casting defects such as shrinkage, the macro analysis of the pneumatic valve body section found that hot section area, have different degrees of shrinkage phenomenon, in order to solve the above problems, the casting process to improve test many times.
poured riser system improvement. Will be installed in the pneumatic valve body on both sides of the cylinder is poured riser system instead of as shown in the pneumatic valve at the bottom of the set with runner system;
to sand casting for the investment casting;
flange down and made them. Because the investment casting sand casting is better than the permeability, faster, more even cooling conditions, change side pouring method for roof water method. So the organization is more dense. Because of liquid steel poured in from the top, but also from the riser directly pouring in, pouring the location of the riser section near the hot area. Create the extremely good order for the casting solidification conditions, hot get timely feeding section area, so the production of casting organization density after process improvement, to eliminate the casting defects such as shrinkage, shrinkage, product qualification rate reached more than %. Measures to improve machining manufacturing precision of the

to improve the manufacturing precision of the pneumatic valve, sealing effect is a key element of pneumatic valve manufacturing. Seal mechanical processing industry has always been difficult to solve problems. Guarantee the pneumatic valve sealing effect, through theoretical research and production practice, summed up the following improvement measures.
due to the requirement of the structure, pneumatic valve is the key mechanical parts in the production of pneumatic valve gate. The pneumatic valve seat sealing surface and center symmetry plane tilt oo. For small and medium-sized sluice pneumatic valve pneumatic valve body, the use of auxiliary curved plates with horizontal lathe tooling ( As shown in figure to complete pneumatic seat inclined plane processing. But must ensure that let the plate Angle ( Oo technological requirements consistent with pneumatic valve body. At the same time, should be more strictly to ensure machine tool center high and bending tooling center high coincidence. Permissible error control in. 毫米。 Mm between. In addition, the pneumatic valve body should be considered in the process of machining a clamping, positioning accuracy and reliability. , as shown by heavy face of lathe spindle's line should be as a reference, using vertical wedge grooves on the surface of the plate and the slide will pneumatic valve body end of the wedge block flange face looking for positive pressure tight, in two sides respectively. In addition, pneumatic valve body in the process of machining, leaned back on the lathe tooling rotate o finish on both ends of the pneumatic valve body cavity machining. Rotation accuracy by distribution in rotary flange two symmetrical distribution of conical positioning pin hole repeat positioning to ensure that the inversion error is. 毫米。 Mm pneumatic valve fluorine-butterfly butterfly
to choose appropriate with counterweight and bent plates. In addition, as is known to all. Lathe on static balance of bending plate tooling, directly affect the machining precision of lathe and the production efficiency, so I bent plate shape and layout of balancing the up and down a lot of work, a is the radius of gyration as far as possible to reduce weight, 2 it is used on the layout within the cylindrical side structure, improve the performance of dynamic balance on the circumferential direction, the machine speed and workpiece machining accuracy to improve as soon as possible.
to ensure the seal components in coordination and processing: at last.
: consistency in the tilt of the pneumatic valve body and disc; Pneumatic valve and processing of pneumatic valve plate consistency of the slope; Ram and turning with the consistency of the slope plate; Ram and grinding Angle of the consistency of the slope.
based on lathe bending Angle, four kinds of consistency between the mutual connection and restriction, rely on each other. Four kinds of consistency. After repeated screening and grinding out of specification draft board, which in turn with a specification with slope Angle plate grinding disc lathe tooling, good control of four kinds of consistency, productivity to ensure the assembly precision is improved.
but also effectively control pneumatic valve seat grinding process, in addition. Ensure pneumatic seat exterior flatness not below:. Ensure that the surface roughness appearance from scratch, knock against, grinding grain size is not equal factors, in order to achieve the best effect after grinding, guarantee the precision of the pneumatic valve seat.