CN1042852C - Hydraulic system of superpressure press for making artifitial diamond - Google Patents
Hydraulic system of superpressure press for making artifitial diamond Download PDFInfo
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- CN1042852C CN1042852C CN 94109234 CN94109234A CN1042852C CN 1042852 C CN1042852 C CN 1042852C CN 94109234 CN94109234 CN 94109234 CN 94109234 A CN94109234 A CN 94109234A CN 1042852 C CN1042852 C CN 1042852C
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Abstract
The present invention discloses a novel hydraulic system of a hinge type hexahedral press for synthesizing artificial diamond, which comprises a hydraulic pump, hydraulic cylinders, a supercharger and a hydraulic control element. The present invention is characterized in that a backpressure valve and a stop valve are arranged in an oil passage of a front cavity of each hydraulic cylinder; the running resistance of each piston can be accurately adjusted by the backpressure valves to realize the accurate positioning of the pistons using synthetic blocks as reference. In order to further improve the synthetic effect, the original hydraulic pump is connected with a front pump with large displacement in parallel, and an electromagnetic valve for unloading is arranged on an outlet of the original hydraulic pump. Because the synthetic blocks are accurately sealed, the present invention reduces the occurrence of hammer explosion in a synthetic process and the loss of a hard alloy top hammer. Because of the adjustment of a high speed and a low speed of idle stroke advancing is realized, the present invention improves the synthetic efficiency and reduces the production cost of artificial diamond.
Description
The present invention relates to a kind of hydraulic system of superpressure press for making, particularly relate to a kind of Superhigh Pressure Hydraulic System that is used for the synthetic hinge formula cubic hinge press of diamond.
The hydraulic system of hinge formula cubic hinge press that is used for the various models of diamond synthesis at present, mainly include one and fall the axial piston pump that amount is 25al, the ftercompction pump that also to join a discharge capacity in addition be 2.5al that has, hydraulic control valve, six oil hydraulic cylinders and ultrahigh pressure Pilot operated check valve, solenoid directional control valve and a throttle valve, in order to control the advancing of hydraulic cylinder piston, stop, pressurize and synchronously.The piston nose of three moving cylinders also all respectively is provided with one group of position limit switch, with the accurate location of control top hammer.
Hydraulic oil is by discharging in the oil hydraulic pump, working connection is divided into two-way behind first three position four-way electromagnetic valve: the one tunnel continues to move forward into second three position four-way electromagnetic valve, a road binders enters the oil hydraulic cylinder back cavity through six groups of throttle valve, two-position four-way solenoid valve and ultrahigh pressure Pilot operated check valve then, and operating cylinder is communicated with pressurized machine through coupling cock by pipeline again simultaneously; Another road binders of being discharged by said second three position four-way electromagnetic valve then enters the operating cylinder ante-chamber, the promotion piston retreats, for the hard alloy top hammer that makes piston nose accurately puts in place when piece is synthesized in contact, respectively be provided with a limit switch three moving cylinder piston nose, close the two-position four-way of three moving cylinder back cavity oil circuits with control.By another oil circuit that said first three position four-way electromagnetic valve is told, then enter the cavity of resorption of pressurized machine via Pilot operated check valve, then piston is upwards promoted to enter oil hydraulic cylinder.Remaining solenoid valve mostly is control signal oil.
Owing to adopt single oil pump feed, piston speed when idle running is advanced can not be controlled, have only single speed.Speed is fast, arrives to close piece, because the repeatability of limit switch is not reliable fully, deviation occurs, the gap that goes out to seal that forms between each top hammer is not waited, reduced synthetic fast sealability, under high temperature, high pressure, easily set off an explosion, increase the consumption of hard alloy top hammer.Simultaneously because after the throttle valve port turned down, during backward stroke of the piston, often because of liquid stream freely does not cause the backhaul overpressure, and oil hydraulic cylinder leaned on throttle valve adjustment also very not convenient.
AC motor drives an oil hydraulic pump in this hydraulic system, another Wechselstrommotor drives a ftercompction pump of working in the ultrahigh pressure building-up process, when so idle running is advanced, all be single speed, too fast in order to prevent the piston motion speed, when causing rundown, because of inertia can't accurately be located, so that break synthetic piece, " fried hammer " accident that the takes place motion speed that can only slow down reduces working efficiency.
The object of the present invention is to provide a kind of new type hydraulic system, can accurately regulate liquid resistance, realize that piston is the accurate location of benchmark with synthetic piece, prevent or reduce the generation of " fried hammer " accident in the building-up process, reduce the loss of hard alloy top hammer.
Further purpose of the present invention be to realize idle running advance soon, adjustable at a slow speed, to increase work efficiency.
The object of the present invention is achieved like this, and native system comprises oil hydraulic pump, hydraulic control valve, oil hydraulic cylinder and pressurized machine.Wherein oil hydraulic cylinder comprises that three three in moving cylinders decide cylinder, and oil hydraulic pump comprises back pump and ftercompction pump.Oil hydraulic pump divides two path a, b after connecting with first three position four-way electromagnetic valve, path a with divide two path a again after second three position four-way electromagnetic valve connects
1, a
2, path a
1Back cavity oil circuit with each oil hydraulic cylinder behind two-position four-way solenoid valve, ultrahigh pressure Pilot operated check valve links, path a
2Link with the ante-chamber oil circuit of each oil hydraulic cylinder; The cavity of resorption oil circuit of said path b footpath one Pilot operated check valve and pressurized machine links; Link with each oil hydraulic cylinder back cavity oil circuit connect a coupling cock in the epicoele oil circuit of said pressurized machine after, this coupling cock is controlled by a two-position four-way solenoid valve, so that where necessary with oil hydraulic cylinder UNICOM or close; Said pressurized machine cavity of resorption oil circuit has two paths in addition, the first is by variable restrictor device oil sump tank, it two is to carry out big flow oil return through Pilot operated check valve, make the piston quick return, it is characterized in that: the back pressure valve of can regulate liquid resistance and the stop valve of may command single cylinder action (K～K) respectively is set in the ante-chamber oil circuit of said each oil hydraulic cylinder.By the high pressure oil of oil hydraulic pump output after entering second three position four-way electromagnetic valve along path a behind first three position four-way electromagnetic valve along path a
1Enter the operating cylinder back cavity through two-position four-way solenoid valve, ultrahigh pressure hydraulic control list by valve, promote piston-advance.Along path a
2Enter the operating cylinder ante-chamber through back pressure valve, stop valve, retreat in order to promote piston, back pressure valve can regulate liquid resistance is to guarantee accurate location.The path b that is come out by first three position four-way electromagnetic valve enters the cavity of resorption of pressurized machine through Pilot operated check valve, rises and carries out supercharging to promote piston, reaches synthesis pressure.
Further purpose of the present invention is achieved in that the front pump in parallel again at the back pump place of said oil hydraulic pump, and existing mouthful of end of this front pump also is connected to one and unloads the two-position four-way solenoid valve of usefulness.
Above-mentioned oil hydraulic cylinder back cavity and a
1Two-position four-way solenoid valve and ultrahigh pressure Pilot operated check valve the best that path connects are two groups, respectively comprise ultrahigh pressure Pilot operated check valve and two-position four-way solenoid valve, respectively with moving cylinder back cavity oil circuit in parallel, decide cylinder back cavity parallel connection oil circuit and link.
The present invention is owing to be provided with the resistance of back pressure valve regulator solution in oil hydraulic cylinder ante-chamber oil circuit, can regulate causes the resistance to motion of piston to equate, and cancelled the throttle valve in the original system, and the limit switch that control piston in the original hydraulic system is advanced location, change contact location into to synthetic piece, each moving cylinder top hammer is when running into synthetic piece, the capital stops because of being obstructed, till three top hammers are all on board, make the location of top hammer more accurate, seal clearance between each top hammer equates, improved the sealability of synthetic piece in the building-up process, reduce or avoided exploding in the diamond building-up process hammer accident and take place, can reduce the loss of hard alloy top hammer greatly, reduce the cost of production of synthetic diamond.Because realize the contact location, original limit in the piston nose setting is lived switch, also is cancelled because of the effect of having lost.
Again because the present invention's front pump in parallel, when the beginning idle running is advanced before and after pump fuel feeding together, piston block speed is advanced, and hammer into shape when soon piece will be synthesized in contact on the top, the front pump of big discharge capacity lacks lotus, piston slows down, and has avoided because of inertia crashes synthetic piece, shortened the time that idle running is advanced, and improves combined coefficient.Because preferred forms of the present invention is reduced to two groups with the one-way valve and the two-position four-way solenoid valve of six groups in oil hydraulic cylinder back cavity oil circuit series connection, has not only reduced cost but also reduced the leakage of oil point.
Below in conjunction with accompanying drawing embodiments of the present invention are described in further detail.
Fig. 1 is a hydraulic scheme of the present invention.
As shown in the figure, the front pump 4 of parallel connection, back pump 3 is driven by AC motor 5, unloads the two-position four-way solenoid valve 6 that valve is used at the outlet connection one of front pump 5, ftercompction pump 2 divides a, b two paths by AC motor 1 drive after each oil hydraulic pump series connection one-way valve 7 back parallel connection links with first three position four-way electromagnetic valve 8.Path a tells a again behind second three position four-way electromagnetic valve 9
1, a
2Two branch roads, a
1Branch road links with moving cylinder back cavity oil circuit in parallel through two-position four-way solenoid valve 11, ultrahigh pressure Pilot operated check valve 12, another group with decide two-position four-way solenoid valve 15 that cylinder back cavity parallel connection oil circuit links, ultrahigh pressure Pilot operated check valve 14 is with said two four road solenoid valves 11, ultrahigh pressure Pilot operated check valve 12 and connect oil circuit a, has a contact to connect two-position four-way solenoid valve 10 between said two-position four-way solenoid valve 11 and ultrahigh pressure Pilot operated check valve 12.Said path a
2Link through each back pressure valve 13, stop valve and oil hydraulic cylinder ante-chamber oil circuit.The said path b that comes out through first three position four-way electromagnetic valve 8 links with pressurized machine 19 cavity of resorptions through a Pilot operated check valve 23.Series connection one coupling cock 17 backs link with each oil hydraulic cylinder back cavity oil circuit in the epicoele oil circuit of said pressurized machine 19, and this coupling cock 17 is by a two-position four-way solenoid valve 16 controls.Have a contact to connect one-way valve 18 between pressurized machine 19, coupling cock 17 oil circuits, these one-way valve 18 the other ends are connected between second three position four-way electromagnetic valve 9 and the two-position four-way solenoid valve 11,15.Said pressurized machine 19 cavity of resorption oil circuits have two paths in addition, and the first is through Solenoid ball valve 20, variable restrictor device 21 oil sump tanks, and another path carries out big flow oil return through Pilot operated check valve 22.
The working procedure of native system is as follows: at first according to the back pressure valve 13 in the forward velocity regulator solution cylinder pressure ante-chamber oil circuit of synthetic piece, make the liquid of each oil hydraulic cylinder hinder the contact location that identical realization is a benchmark with synthetic piece, and reliable with the sealing that guarantees synthetic piece.By pressure transducer and each electric elements of microcomputer control, finish entire work process again.Start working.Starting AC motor 5, when idle running is advanced fast, the 5CT of front pump unloading valve 6 action, front pump 4 and back pump 3 in parallel are worked simultaneously, and during the 1CT action, pressure oil is by three position four-way electromagnetic valve R.4CT action then, pressure oil is by three position four-way electromagnetic valve 9, and 9CT moves then, and pressure oil enters the moving cylinder back cavity of oil hydraulic cylinder by two-position four-way solenoid valve 11 and ultrahigh pressure Pilot operated check valve 12, promote piston-advance, piston is fast during near synthetic piece, opens 5CT, and front pump 4 is by solenoid valve 6 off-loads, piston becomes at a slow speed, until the synthetic piece of contact, when entering the topping up operation, open 8CT, the partial pressure oil that from three position four-way electromagnetic valve 9, comes out, enter six oil hydraulic cylinders simultaneously through two two-position four-way solenoid valves 11,15, make, deciding cylinder advances simultaneously, the synthetic piece of compression, two-position four-way solenoid valve 16 is operated simultaneously, opens the Pilot operated check valve 22 of coupling cock 17 and pressurized machine 19 cavity of resorptions, makes pressurized machine epicoele topping up, topping up finishes, promptly enter the superpressure stage, open 2CT hydraulic oil, enter pressurized machine 19 cavity of resorptions through Pilot operated check valve 23 from three position four-way electromagnetic valve 8, the promotion piston rises, make super high pressure oil through coupling cock 17, enter the hydraulic jack back cavity, after waiting to reach synthesis pressure, it is synthetic just can to switch on.Enter packing stage and close AC motor 1,52CT, 4CT, 8CT, 9CT, the pressurize certain hour, gas loses a part of pressure in pressure maintaining period, can finish the building-up process of cemented carbide by opening the 2CT supplementary pressure of AC motor 1 and three position four-way electromagnetic valve 8.Open 6CT, pressurized machine 19 is by Solenoid ball valve 20, adjustable choke 21 off-loads, at this moment, connect alternator 5, open 1CT, 3CT, pressure oil enters each oil hydraulic cylinder Pu chamber through three position four-way electromagnetic valve 8,9 through back pressure valve 13, the Pilot operated check valve 12,14 of the pressure oil of back cavity through opening is by two-position four-way solenoid valve 10,11,15 off-loads, and backward stroke of the piston is finished a working procedure.
Claims (4)
1, a kind of novel hydraulic system of synthetic diamond superpressure press for making, comprise that the said oil hydraulic cylinder of oil hydraulic pump, hydraulic control valve, oil hydraulic cylinder and pressurized machine comprises that three moving cylinders, three decide cylinder, said oil hydraulic pump comprises ftercompction pump and back pump, first 3-position 4-way magnet-valve (8) of oil hydraulic pump (3) connects, divide two path a, b afterwards, path a with divide two path a again after second three position four-way electromagnetic valve (9) connects
1, a
2, path a
1Back cavity oil circuit with each oil hydraulic cylinder behind two-position four-way solenoid valve, ultrahigh pressure Pilot operated check valve links, path a
2Link with the ante-chamber oil circuit of each oil hydraulic cylinder; Said path b links through the cavity of resorption oil circuit of a Pilot operated check valve (23) with pressurized machine (19); Connect a coupling cock (17) back and links with each oil hydraulic cylinder back cavity oil circuit in the epicoele oil circuit of said pressurized machine (19), this coupling cock (17) is by a two-position four-way solenoid valve (16) control, so that where necessary with oil hydraulic cylinder UNICOM or close; Said pressurized machine (19) cavity of resorption oil circuit has two paths in addition, the first is by variable restrictor device (21) oil sump tank, another path carries out big flow oil return through Pilot operated check valve (22), make the piston quick return, it is characterized in that: the back pressure valve (13) of can regulate liquid resistance and the stop valve of may command single cylinder action (K～K) respectively is set in the ante-chamber oil circuit of said each oil hydraulic cylinder.
2, the novel hydraulic system of synthetic diamond superpressure press for making according to claim 1, it is characterized in that: locate and a front pump in parallel (4) at the back pump (3) of said oil hydraulic pump, the outlet end of this front pump (4) also is connected to the two-position four-way solenoid valve (6) that an off-load is used.
3, the novel hydraulic system of synthetic diamond superpressure press for making according to claim 1, it is characterized in that: ultrahigh pressure Pilot operated check valve and two-position four-way solenoid valve the best of the coupled in series of control oil hydraulic cylinder action are two groups in the said oil hydraulic cylinder back cavity oil circuit, one group comprises that ultrahigh pressure fluid-control one-way (12) and two-position four-way solenoid valve (11) connect cylinder back cavity oil circuit in parallel, and another group comprises that ultrahigh pressure Pilot operated check valve (14) and two-position four-way solenoid valve (15) connect and decides to control oil circuit in parallel behind the cylinder.
4, according to the novel hydraulic system of claim 1,2 or 3 described synthetic diamond superpressure press for making, it is characterized in that, at preceding series connection one Solenoid ball valve of variable restrictor device (21) (20) of the following oil circuit of said pressurized machine (19).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94109234 CN1042852C (en) | 1994-08-29 | 1994-08-29 | Hydraulic system of superpressure press for making artifitial diamond |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94109234 CN1042852C (en) | 1994-08-29 | 1994-08-29 | Hydraulic system of superpressure press for making artifitial diamond |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1109145A CN1109145A (en) | 1995-09-27 |
| CN1042852C true CN1042852C (en) | 1999-04-07 |
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ID=5033816
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 94109234 Expired - Fee Related CN1042852C (en) | 1994-08-29 | 1994-08-29 | Hydraulic system of superpressure press for making artifitial diamond |
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| Country | Link |
|---|---|
| CN (1) | CN1042852C (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8607559B2 (en) * | 2009-12-29 | 2013-12-17 | Eaton Corporation | Fluid bypass system |
| DK2840260T3 (en) * | 2013-08-22 | 2019-02-18 | Minibooster Hydraulics As | Hydraulic System |
| CN104401850A (en) * | 2014-09-18 | 2015-03-11 | 韦伯电梯有限公司 | Hydraulic elevator system with large load and high speed |
| CN104454718A (en) * | 2014-11-07 | 2015-03-25 | 秦皇岛瑞晶太阳能科技有限公司 | Hydraulic system of BIPV solar module positive-pressure packaging device |
| CN107939754B (en) * | 2017-10-12 | 2019-10-29 | 郑州磨料磨具磨削研究所有限公司 | A kind of single-crystal diamond Superhigh Pressure Hydraulic System |
| CN108445790A (en) * | 2018-04-12 | 2018-08-24 | 鸡西浩市新能源材料有限公司 | A kind of control method of the electric-control system main circuit of press |
| CN109611399B (en) * | 2018-11-15 | 2020-07-14 | 郑州磨料磨具磨削研究所有限公司 | Throttle valve and pressure relief system |
| CN110864021B (en) * | 2019-12-02 | 2021-07-27 | 郑州磨料磨具磨削研究所有限公司 | Synchronous control system for hydraulic oil cylinder of cubic press |
-
1994
- 1994-08-29 CN CN 94109234 patent/CN1042852C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1109145A (en) | 1995-09-27 |
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