Fragment-free metal arched rupture disk with crossed slot, production device and manufacturing method thereof

Abstract

The invention discloses a fragment-free metal arched rupture disk with a crossed slot, a production device and a manufacturing method thereof. The production device comprises a slot pressing clamping fixture, a pre-arching clamping fixture and a pressure testing machine, wherein a slot pressing cutter is arranged in the slot pressing clamping fixture; and the pre-arching clamping fixture is arranged in the pressure testing machine. The manufacturing method comprises the following steps of: pressing the crossed slot of a blank of the rupture disk in the slot pressing clamping fixture, arching the blank subjected to slot pressing in the pre-arching clamping fixture by utilizing pressure fluid, and performing low-temperature annealing, complete annealing or secondary pre-arching and secondary annealing to manufacture the rupture disk. The production device can produce a right-arched or counter-arched rupture disk and is easy to operate; and the produced rupture disk has the advantages of fatigue resistance, corrosion resistance, no fragments after rupture and the like.

Description

technical field [0001] The invention belongs to the technical field of safety overpressure relief, and relates to a cross-recessed fragment-free metal arch bursting disc, a production device and a manufacturing method thereof. Background technique [0002] At present, cross-groove rupture discs are widely used in rupture disc products due to their stable performance, fatigue resistance, and no fragments. At present, there are two methods for manufacturing cross-groove rupture discs: one is the manufacturing technology of free pre-arching after flat groove or milling groove; the other is convex or concave surface groove technology, which uses spherical tires to pre-arch into an arched shape. Finally, the manufacturing technology of embossing grooves on the convex or concave surface of the arched blank. [0003] The manufacturing process of the arched bursting disc with flat groove is as follows: After flat grooved, the periphery of the blank is fixed, pressurized by fluid, t...

AI Technical Summary

Problems solved by technology

Although there is a gap in the middle of the grooving knife, it can prevent the blank from being repeatedly grooved at the center and cause the groove to crack at the intersection. When the bursting disc is blasted, the part without the groove in the middle is not easy to break, which will cause the bursting disc to fail to crack completely and affect the discharge. During the two-time grooving process, asymmetry is prone to occur at the middle gap, which also aggravates the inability to completely crack

[0009] 2. The grooved tire is simple, and the depth of the groove cannot be adjusted freely, so the precision of the manufactured product is not high

[0018] These grooving knives and concave and convex molds not only need to be processed with high precision, but also have high hardness, so the mold processing cost is high

[0019] 2. This process is difficult to manufacture anti-arch bursting discs with arbitrary pressure

Since each caliber reverse-arch groove type rupture disc needs a concave spherical tire for pre-arching and a strip-shaped convex arc knife, it is difficult to process multiple sets of tires with different arching heights for this caliber of pre-arching tires and cutters. Therefore, the anti-arch groove type bursting discs manufactured by the mold can usually only rely on adjusting the thickness of the blank to realize the production of bursting discs with different pressures, and it is impossible to buy raw materials of any thickness on the market.

Therefore, this process manufactures reverse-arch groove bursting discs. The number of bursting pressure specifications that can be manufactured is limited, and it is impossible to manufacture arbitrary bursting pressures. Otherwise, multiple sets of molds with arbitrary arching heights must be processed to meet the manufacturing of bursting discs with arbitrary bursting pressures.

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