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CN-121972084-A - Pressure regulating and controlling device in high-pressure cavity based on hexahedral top press

CN121972084ACN 121972084 ACN121972084 ACN 121972084ACN-121972084-A

Abstract

The invention discloses a pressure regulating device in a high-pressure cavity based on a hexahedral press, and belongs to the technical field of hexahedral presses. The invention discloses a pressure regulating device in a high-pressure cavity based on a hexahedral top press, which comprises a cylinder body and a piston rod sliding in the cylinder body, wherein a hammer head is fixed at the outer end of the piston rod, a pressure detection mechanism for detecting hammer head stress is arranged on the surface of the hammer head, a pressure relief hole communicated with a pressurizing cavity is formed in the back of the cylinder body, and release oil pressure is controlled through a pressure regulating component.

Inventors

  • YU SHUANGWEI
  • ZHANG BAO
  • XU SHUJIAN
  • YU DONG

Assignees

  • 河南平煤神马超硬材料股份有限公司

Dates

Publication Date
20260505
Application Date
20260327

Claims (10)

  1. 1. Pressure regulation and control device in high pressure cavity based on hexahedral top press, a serial communication port, including cylinder body (1) and slip piston rod (2) inside cylinder body (1), piston rod (2) outer end is fixed with tup (201), tup (201) surface is provided with pressure detection mechanism (202) that are used for detecting tup (201) stress, pressure release hole (3) with the pressurized cavity intercommunication have been seted up at cylinder body (1) back, pressure release hole (3) are through pressure regulating assembly (4) control release oil pressure, pressure regulating assembly (4) set up inside sealed cowling (301), sealed cowling (301) are fixed at cylinder body (1) back, sealed cowling (301) are linked together with the back-off cavity through back flow (302).
  2. 2. The pressure regulating device in a high-pressure cavity based on a hexahedral press according to claim 1, characterized in that the pressure regulating assembly (4) comprises a first turntable (401) rotating on the back of the cylinder (1) through a rotating shaft (402) and a first blocking ball (403) for blocking the discharge opening of the pressure relief hole (3), the diameter of the first blocking ball (403) being larger than the diameter of the pressure relief hole (3).
  3. 3. The pressure regulating device in the high-pressure cavity based on the hexahedral press according to claim 2, wherein a limit groove (404) is formed in one side of the first rotary table (401) facing the cylinder body (1), the limit groove (404) is annular and is concentrically arranged with the first rotary table (401), a plurality of release grooves (405) are formed in the limit groove (404), and the depth of the release grooves (405) is larger than that of the limit groove (404).
  4. 4. The pressure regulating device in the high-pressure cavity based on the hexahedral press according to claim 1, wherein a plugging assembly (5) for plugging the inlet of the pressure relief hole (3) is arranged inside the cylinder (1), the plugging assembly (5) comprises a second turntable (501) arranged at the end part of the rotating shaft (402) and a plurality of second plugging balls (502) for plugging the inlet of the pressure relief hole (3), and the second plugging balls (502) are arranged in a ring shape and are concentric with the second turntable (501).
  5. 5. The pressure regulating device in a high-pressure cavity based on a cubic press according to claim 4, wherein the second turntable (501) slides on the end of the rotating shaft (402) through a square slide bar (503), and the second turntable (501) slides inside the rotating shaft (402) through a guide assembly (6).
  6. 6. The pressure regulating device in the high-pressure cavity based on the hexahedral press according to claim 5, wherein the guiding assembly (6) comprises a guiding ring (601) fixed in the groove and a plurality of guiding posts (602) fixed on the periphery of the second turntable (501), the guiding groove (603) is formed in the inner side of the guiding ring (601), and the guiding posts (602) slide in the guiding groove (603).
  7. 7. The pressure regulating device in a high-pressure chamber based on a cubic press according to claim 6, wherein a gap is provided between the second turntable (501) and the guide ring (601).
  8. 8. The pressure regulating device in the high-pressure cavity based on the hexahedral press according to claim 6, wherein the guide groove (603) comprises a plurality of V-shaped parts for driving the second plugging ball (502) to plug the pressure release hole (3) and a plurality of horizontal parts for separating the second plugging ball (502) from the pressure release hole (3), and the V-shaped parts and the horizontal parts are staggered and are communicated end to end.
  9. 9. The pressure regulating device in the high-pressure cavity based on the hexahedral press according to claim 6, wherein the number of the guide posts (602), the second blocking balls (502), the avoiding grooves (505) and the releasing grooves (405) is the same and is equal to two.
  10. 10. The pressure regulating device in the high-pressure cavity based on the hexahedral press according to claim 5, wherein a constant pressure hole (7) is formed in the middle of the square slide bar (503), and the constant pressure hole (7) penetrates through the square slide bar (503).

Description

Pressure regulating and controlling device in high-pressure cavity based on hexahedral top press Technical Field The invention relates to the technical field of hexahedral press, in particular to a pressure regulating device in a high-pressure cavity based on a hexahedral press. Background The superhard materials such as artificial diamond and the like are used as important basic materials in the modern industry and have irreplaceable application in the fields of machining, geological drilling, electronic packaging and the like. The hexahedral top press has become the most widely applied core equipment in the field of the synthesis of the superhard materials in China by virtue of the advantages of symmetrical structure, high production efficiency, simplicity and convenience in operation and the like. In the working process of the hexahedral top press, the hammer faces of six tungsten carbide hard alloy top hammers are jointly enclosed to form a high-pressure cavity. The hydraulic system drives the top hammer to apply ultrahigh pressure to the pyrophyllite blocks and the synthetic blocks in the cavity, and the high-pressure environment meeting the conversion of graphite into diamond is created in the cavity by combining high-current heating. In this process, accurate control of pressure is a key factor in determining the quality of the resultant product, the safety of the equipment operation, and the life of the jack hammer. For example, patent CN120242871B (a cubic press top hammer device and a method for processing diamond with high heat conduction function) realizes accurate detection of pressure on the surface of the hammer head by directly installing a pressure detection mechanism on the surface of the hammer head. When the pressure overload of the hammer head is detected, the control system drives the hydraulic pumping mechanism to suck and release pressure in the stretching driving cavity, so that hydraulic oil is instantaneously discharged, the pressure of the surface of the hammer head is rapidly reduced, and the top hammer is prevented from being broken and damaged due to the pressure overload. However, in practical applications, the above-mentioned quick pressure release mechanism still has a certain limitation, and the pressure release mode is one-time conduction, and when the pressure release hole is aligned with the through hole, hydraulic oil in the expansion driving chamber can largely rush into the contraction driving chamber in a very short time, so that the pressure of the hammer head suddenly drops. Although the abrupt pressure change can rapidly remove the overload state, the abrupt pressure change also easily causes new problems that on one hand, the pressure dip can damage the stable thermodynamic equilibrium established in the high-pressure cavity and affect the continuity and uniformity of crystal growth, and on the other hand, the excessive pressure release can cause insufficient thrust of the top hammer, so that the cavity pressure is lower than the critical value required by synthesis, and the synthesis fails. Therefore, on the premise of ensuring safe pressure relief, the method realizes the fine control of the pressure relief process, avoids the interference to the synthesis process caused by excessive pressure relief at one time, and becomes a technical problem to be solved in the field. Disclosure of Invention The invention aims to solve the problems in the prior art, and provides a pressure regulating device in a high-pressure cavity based on a hexahedral press. In order to achieve the above purpose, the present invention adopts the following technical scheme: Pressure regulation and control device in high pressure cavity based on hexahedral top press, including cylinder body and the piston rod of sliding in the cylinder body inside, the piston rod outer end is fixed with the tup, the tup surface is provided with the pressure detection mechanism that is used for detecting the tup stress, the pressure release hole with the pressurized cavity intercommunication has been seted up at the cylinder body back, the pressure release hole passes through pressure regulating assembly control release oil pressure, pressure regulating assembly sets up inside the sealed cowling, the sealed cowling is fixed at the cylinder body back, the sealed cowling is linked together with the back-off chamber through the back flow. In some embodiments, the pressure regulating assembly comprises a first turntable rotated on the back of the cylinder body through a rotating shaft and a first plugging ball for plugging the discharge port of the pressure relief hole, wherein the diameter of the first plugging ball is larger than that of the pressure relief hole. In some embodiments, a limiting groove is formed in one side, facing the cylinder body, of the first rotating disc, the limiting groove is annular and is concentric with the first rotating disc, a plurality of release grooves are formed in the limitin