CN100484597C - Heating and pressure-maintaining direction unisotonic oil-supplying hydraulic controlling system for hexahedral top pressing machine - Google Patents

Heating and pressure-maintaining direction unisotonic oil-supplying hydraulic controlling system for hexahedral top pressing machine Download PDF

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Publication number
CN100484597C
CN100484597C CNB2007100544388A CN200710054438A CN100484597C CN 100484597 C CN100484597 C CN 100484597C CN B2007100544388 A CNB2007100544388 A CN B2007100544388A CN 200710054438 A CN200710054438 A CN 200710054438A CN 100484597 C CN100484597 C CN 100484597C
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valve
pressure
super
control
fluid
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Expired - Fee Related
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CNB2007100544388A
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CN101121078A (en
Inventor
郭建国
张帅
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Zhongnan Diamond Co Ltd
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Nanyang Zhongnan Diamond Co Ltd
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Abstract

The present invention relates to a hydraulic pressure control system used for anisobaric supplying oil to a diamond synthetic hexahedral press towards heating and pressure holding direction. The system can respectively isobaric or anisobaric supply oil to the hydraulic cylinders of heating and pressure holding direction according to the diamond synthetic technology by arranging a superpressure oil pump, a superpressure liquid control spool valve and relevant hydraulic elements, so as to realize a collocation and combination of different pressure. The system is applied to a symmetric or asymmetric anvil and can improve the sealing and pressure transmitting effects of a synthetic cavity and increase a high compacting stroke and a synthesis efficiency, so as to satisfy the requirement of synthesizing a large particle diamond product with a high quality grade.

Description

The hydraulic control system of cubic hinge press heating and pressure-maintaining direction anisobaric fuel feeding
Technical field
The invention belongs to the hydraulic technique field, especially for the cubic hinge press heating of the synthetic usefulness of diamond and the hydraulic control system of pressure-maintaining direction anisobaric fuel feeding.
Background technology
Cubic apparatus diamond synthesis device hydraulic system adopts booster to obtain super-pressure more at present, and to six cylinders while fuel feeding, each cylinder pressure is identical by communicating valve, and thrust is identical.Hammer cross section, used six tops is a square, and wherein, any direction two top hammers in top to bottom, left and right, front and rear can be elected to be the energising heated anvil, and remaining four top hammers are referred to as to call pressurize top hammer.Synthetic cavity is a regular hexahedron, and synthetic piece is made up of parts such as pyrophyllite hollow block, conductive ring, synthetic rods.In pressure process, pyrophyllite flows and forms 12 identical sealing strips between the hammer of top, and sealing synthetic cavity internal cause high temperature and super-pressure effect form graphite and metal solvent dissolves material.This synthesis mode because of 12 pyrophyllite sealing strips along with pressure and the increase in temperature compressed coefficient reduce, having hindered pressure transmits to synthetic chamber heart portion, equipment compression stroke and pressurization efficient have been influenced, and adopt the booster generated time to be restricted, can't satisfy the synthetic needs of producing of bulky diamond.
Summary of the invention
The purpose of this invention is to provide and a kind ofly can satisfy the requirement of bulky diamond synthesis technique, improve the diamond synthesis grade, the super-pressure pressure of realizing heating and pressure-maintaining direction is a kind of hydraulic control system of combination arbitrarily.
Realize that the technical scheme that the object of the invention is taked is: in existing cubic hinge press hydraulic control system, two superpressure oil pumps are set, one of them superpressure oil pump is communicated with communicating valve in the pressurize liquid road by check valve, another superpressure oil pump is communicated with super-pressure hydraulic control on-off valve by check valve, this on-off valve is communicated with solenoid directional control valve by control piper, solenoid directional control valve is communicated with overflow valve and plunger displacement pump respectively by check valve, a super-pressure fluid of on-off valve exports the communicating valve UNICOM with the heating fluid road, be parallel with super-pressure hydraulic unloading valve and hand stop valve therebetween, the communicating valve UNICOM on the super-pressure fluid output of on-off valve and pressurize liquid road, 6 output liquid roads of super high pressure oil liquid control system are communicated with the back cavity of cubic apparatus fluid cylinder respectively.
Described super-pressure hydraulic control on-off valve has a valve body and a spool, wherein, the centre of valve body is provided with the step through-hole that spool is installed, its rear end forms a piston cavity by the end cap that has central through hole, the two ends of cavity are respectively equipped with the access opening that is used to control the fluid turnover, the middle part of valve body radially is provided with can be for the normal open hole of super-pressure fluid free flow, front end is pressed with high-pressure pipe connector by swivel nut, spool is a rhabodoid, its rear portion is installed in the central through hole of end cap, piston is equipped with at the middle part, and be positioned at piston cavity and do by the pressure reduction of fluid and move forward and backward, the front end of spool is for opening and closing the conical surface of valve body flow area, and this conical surface contacts with the oilhole cooperation of valve pocket, the other end high-pressure pipe connector contact of valve pocket.
Described superpressure oil pump is driven by dragging motor, and dragging motor adopts Frequency Converter Control, by changing motor incoming frequency conversion rotating speed, regulates the flow and the pressure of superpressure oil pump.
Cubic apparatus heating of the present invention and pressure-maintaining direction anisobaric hydraulic control system, by superpressure oil pump, super-pressure hydraulic control on-off valve and the relevant Hydraulic Elements of setting up, can be according to the requirement of diamond synthesizing process respectively to heating and pressure-maintaining direction hydraulic cylinder equipressure or anisobaric fuel feeding, realize different pressure matched combined, improve synthetic cavity sealing and pressure transmission effect effectively, improve press strokes and equipment pressurization efficient, satisfy the requirement of synthetic bulky grain, high grade diamond product.
Description of drawings
Fig. 1 is a hydraulic system principle figure of the present invention;
Fig. 2 is the structural representation of super-pressure hydraulic control on-off valve.
The specific embodiment
The label of each Hydraulic Elements of hydraulic control system is respectively among Fig. 1: plunger-type fuel pump 1,13, check valve 2,14,19,20, electro-hydraulic reversing valve 3, solenoid directional control valve 4,6,7,12,27,28,29,30,31,32, overflow valve 5,15,45, communicating valve 8,18, superpressure oil pump 9,11, super-pressure hydraulic control on-off valve 10, hand stop valve 16, super-pressure hydraulic unloading valve 17, adjustable throttling 21,22,23,24,25,26, super-pressure hydraulic control one-way valve 33,34,35,36,37,38, pressure-maintaining direction hydraulic cylinder 39,40,41,42, heating direction hydraulic cylinder 43,44, accumulator 46.
Referring to Fig. 1, hydraulic control system of the present invention is provided with two superpressure oil pumps 9,11, and wherein superpressure oil pump 9 is by check valve 20 and communicating valve 8 UNICOMs, the back cavity UNICOM of the outlet of communicating valve 8 and pressure-maintaining direction hydraulic cylinder 39,40,41,42, and provide super-pressure fluid for it.Superpressure oil pump 11 connects a super-pressure hydraulic control on-off valve 10 by check valve 19, the normal open hole of this valve and communicating valve 18 UNICOMs, and communicating valve 18 connects with the back cavity of heating direction top hydraulic cylinder 43,44, and provides super-pressure fluid for it.The controlled output and the communicating valve 8 of super-pressure hydraulic control on-off valve 10 link, and for pressure-maintaining direction hydraulic cylinder 39,40,41,42 provides super-pressure fluid, its break-make control realizes by a two-position four-way solenoid directional control valve 12.The inlet of solenoid directional control valve 12 is parallel with overflow valve 15 and check valve 14, and check valve 14 connects with plunger displacement pump 13, for on-off valve 10 provides control fluid.Be parallel with super-pressure hydraulic unloading valve 17 and hand stop valve 16 between super-pressure hydraulic control on-off valve 10 and the communicating valve 18, can be respectively applied for oil pressure unloading and the improper unloading of hydraulic cylinder when retreating.Above-mentioned each Hydraulic Elements all are coupled to each other by corresponding high pressure liquid road pipeline.
The superpressure oil pump 9,11 of hydraulic control system of the present invention is driven by dragging motor M1, M2 respectively, and dragging motor M1, M2 all adopt Frequency Converter Control, can regulate the flow and the pressure of superpressure oil pump by changing motor incoming frequency conversion rotating speed.
Referring to Fig. 2, the break-make that super-pressure hydraulic control on-off valve in the ultrahigh-pressure hydraulic control system of the present invention is mainly used between two superpressure oil pumps connects, it has a valve body 10-2 and a spool 10-3, the coaxial step through-hole that is provided with in the centre of valve body 10-2 wherein, its rear end forms a piston cavity by the end cap 10-1 that has central through hole, the two ends of cavity are respectively equipped with solenoid directional control valve 12 and are communicated with, be used to control the access opening 10-10 of fluid circulation, 10-11, the middle part of valve body 10-2 radially is provided with normal open hole 10-7,10-8, can be for the super-pressure fluid free flow on heating fluid road, the valve pocket 10-4 that cooperates keying with spool 10-3 is housed in the centre bore of valve body 10-2, front end is pressed with high-pressure pipe connector 10-5 by swivel nut 10-6, and connect with communicating valve 8 by pressure piping, spool 10-3 is a rhabodoid, its rear portion is installed in the central through hole of end cap 10-1, piston 10-9 is equipped with at the middle part, and be positioned at piston cavity and do by the pressure reduction of fluid and move forward and backward, the front end of spool 10-3 is for opening and closing the conical surface of valve body flow area, this conical surface contacts with the oilhole cooperation of valve pocket 10-4, the other end high-pressure pipe connector 10-5 contact of valve pocket 10-4.On-off valve 10 adopts electrichydraulic control by solenoid directional control valve 12, presses position shown in the figure, and when left end control oil circuit was oil-feed, spool 10-3 moved right, and on-off valve 10 is closed, otherwise on-off valve 10 is opened.
The operation principle of ultrahigh-pressure hydraulic control system of the present invention is: when the work step that advances in idle running, plunger-type fuel pump 1 starts, open on the pressurize liquid road of electro-hydraulic reversing valve 3 and solenoid directional control valve 27,28 and the heating fluid road of solenoid directional control valve 31, oil circuit by plunger-type fuel pump 1 → check valve 2 → reversal valve 3 →
Suspend three seconds when three fluid cylinders reach desired location, change the topping up work step over to, to six fluid cylinder topping ups, oil circuit by plunger-type fuel pump 1 → check valve 2 → reversal valve 3 →
After reaching setup pressure value, plunger-type fuel pump 1 stops, change the superpressure work step over to, superpressure oil pump 9,11, plunger-type fuel pump 13 pumps start simultaneously, reversal valve 7,12 commutations, super-pressure on-off valve 10 is opened, and communicating valve 8,18 is communicated with, two superpressure oil pumps 9,11 are united to six oil supply cylinders, and this moment, each cylinder pressure was identical.After system reaches setting pressure, reversal valve 12 commutation, control oil is closed on-off valve 10, superpressure oil pump 9 through communicating valve 8 to the left and right before and after pressure-maintaining direction hydraulic cylinder 39,40,41,42 fuel feeding.Superpressure oil pump 11 is through super-pressure on-off valve 10, communicating valve 18 two heating direction hydraulic cylinder fuel feeding up and down.By regulating the motor incoming frequency, two branch superelevation hydraulic fluid roads can obtain to stop in the difference, secondary superpressure, pressurize work step pressure set points.Behind end of synthesis, superpressure oil pump 9,11 stops, on-off valve 10 is opened, and each cylinder pressure equilibrium is by super-pressure hydraulic unloading valve 17 automatically unloadings, after being discharged to setting value, plunger-type fuel pump 1 starts, and reversal valve 3,4 is opened, and hydraulic oil is pressed into six fluid cylinder ante-chambers by plunger-type fuel pump 1 through check valve 2, reversal valve 3, quick return is finished a working cycles.
Use heating direction of the present invention and pressure-maintaining direction anisobaric fuel feeding hydraulic control system, can or be communicated with fuel feeding to heating direction hydraulic cylinder and pressure-maintaining direction hydraulic cylinder difference fuel feeding, position shown in Figure 1 is as heated anvil the upper and lower knocker, can also be by changing connecting line, about or front and back top hammer as heated anvil, to realize different pressure matched combined.This hydraulic control system can be used for symmetry top hammer, also can be used for asymmetric top hammer, and promptly the heated anvil end face is a square, and pressurize top hammer tip face is a rectangle, or changes top hammer conical surface angle, in order to improve compression stroke and equipment pressurization efficient.

Claims (3)

1. the hydraulic control system of cubic hinge press heating and pressure-maintaining direction anisobaric fuel feeding, it is characterized in that: this system is provided with two superpressure oil pumps, one of them superpressure oil pump is communicated with communicating valve in the pressurize liquid road by check valve, another superpressure oil pump is communicated with super-pressure hydraulic control on-off valve by check valve, this on-off valve is communicated with solenoid directional control valve by control piper, solenoid directional control valve is communicated with overflow valve and plunger displacement pump respectively by check valve, a super-pressure fluid of on-off valve exports the communicating valve UNICOM with the heating fluid road, be parallel with super-pressure hydraulic unloading valve and hand stop valve therebetween, the communicating valve UNICOM on the super-pressure fluid output of on-off valve and pressurize liquid road, 6 output liquid roads of super high pressure oil liquid control system are communicated with the back cavity of cubic apparatus fluid cylinder respectively.
2, the hydraulic control system of cubic hinge press heating according to claim 1 and pressure-maintaining direction anisobaric fuel feeding, it is characterized in that: described super-pressure hydraulic control on-off valve has a valve body and a spool, wherein, the centre of valve body is provided with the step through-hole that spool is installed, its rear end forms a piston cavity by the end cap that has central through hole, the two ends of cavity are respectively equipped with the access opening that is used to control the fluid turnover, the middle part of valve body radially is provided with can be for the normal open hole of super-pressure fluid free flow, front end is pressed with high-pressure pipe connector by swivel nut, spool is a rhabodoid, its rear portion is installed in the central through hole of end cap, piston is equipped with at the middle part, and be positioned at piston cavity and do by the pressure reduction of fluid and move forward and backward, the front end of spool is for opening and closing the conical surface of valve body flow area, this conical surface contacts with the oilhole cooperation of valve pocket, the other end high-pressure pipe connector contact of valve pocket.
3, the hydraulic control system of cubic hinge press heating according to claim 1 and pressure-maintaining direction anisobaric fuel feeding, it is characterized in that: described superpressure oil pump is driven by dragging motor, and dragging motor adopts Frequency Converter Control.
CNB2007100544388A 2007-05-22 2007-05-22 Heating and pressure-maintaining direction unisotonic oil-supplying hydraulic controlling system for hexahedral top pressing machine Expired - Fee Related CN100484597C (en)

Priority Applications (1)

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CNB2007100544388A CN100484597C (en) 2007-05-22 2007-05-22 Heating and pressure-maintaining direction unisotonic oil-supplying hydraulic controlling system for hexahedral top pressing machine

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Application Number Priority Date Filing Date Title
CNB2007100544388A CN100484597C (en) 2007-05-22 2007-05-22 Heating and pressure-maintaining direction unisotonic oil-supplying hydraulic controlling system for hexahedral top pressing machine

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CN103768998A (en) * 2013-12-31 2014-05-07 郑州磨料磨具磨削研究所有限公司 Rotary type ultrahigh pressure supercharger of synthetic diamond cubic press
CN105604991B (en) * 2016-01-21 2017-08-25 燕山大学 A kind of submarine navigation device hatch door opens and closes hydraulic control system

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