A multi-layer multi-surface spherical split type high pressure device

Abstract

The invention discloses a multilayer multi-surface sphere splitting type high-pressure device, relates to a synthesis preparation device for materials, such as synthetic diamond, and belongs to the technical field of high pressure. The multilayer multi-surface sphere splitting type high-pressure device comprises multi-surface sphere splitting blocks, a shell and a fastener, wherein the multi-surface sphere splitting blocks are in multiple layers; splitting lines of the two adjacent layers of the splitting blocks are staggered with each other; a cavity which is formed by combining the innermost layer of multi-surface sphere splitting blocks is a sphere or polyhedron; the multi-surface sphere splitting blocks in multiple layers are combined and then are butt-jointed and fixed through hemispherical shells; and the hemispherical shells are connected through the fastener. Each layer of the multilayer multi-surface sphere splitting type high-pressure device is uniformly stressed, the volume of the cavity is obviously increased and the pressure of the cavity is also obviously increased.

Description

technical field [0001] The present invention relates to a multi-layer multi-faceted ball split type high-voltage device, in particular, to the synthesis and preparation of superhard materials such as synthetic diamond, cubic boron nitride and its products, and new materials that cannot be prepared under "normal pressure" The device belongs to the high voltage technical field. Background technique [0002] The current ultra-high pressure devices mainly include six-sided roof devices and two-sided roof devices. The cavity of the six-sided top device is a hexahedron, and each surface has an anvil to apply pressure. Its multi-cylinder synchronization is poor, the stroke is short, the cavity is small, and there is mutual extrusion between the pressure heads, it is difficult to form a stable high pressure for a long time High temperature conditions; the cavity of the double-sided roof device is cylindrical, and the strength of the inner wall of the cylinder is increased by applyi...

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Problems solved by technology

The cavity of the six-sided top device is a hexahedron, and each surface has an anvil to apply pressure. Its multi-cylinder synchronization is poor, the stroke is short, the cavity is small, and there is mutual extrusion between the pressure heads, it is difficult to form a stable high pressure for a long time High temperature conditions; the cavity of the double-sided roof device is cylindrical, and the strength of the inner wall of the cylinder is increased by applying a pre-tightening force to the inner cylinder body and the outer steel ring, but the resulting pre-tightening force is limited

B.C.Von Platen once invented a two-layer spherical pressurized container, each layer is composed of 6 ball petals, the cavity formed by the inner ball petals is a cube, and a hydraulic cavity is added outside the combined sphere. Pressure is applied on the surface to make the ball valve shrink to produce a supercharging effect, but due to the problems of sealing and stress concentration, the pressure cannot be very high, and there is vibration during the supercharging process

Naoto Kawai combined two segmented opposite cones into a spherical cavity, and the two combined cones were respectively set in the anvil controlled by the press, and the combined cone was shrunk and pressurized through the cooperation of the cone surface, but It is easy to produce bending stress at the top surface and fail, and the anvil is also easily damaged due to excessive circumferential stress and stress concentration at the inner wall

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