CN102619797B - Double-cylinder synchronous hydraulic circuit with functions of supercharging and eliminating accumulated error - Google Patents
Double-cylinder synchronous hydraulic circuit with functions of supercharging and eliminating accumulated error Download PDFInfo
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- CN102619797B CN102619797B CN201210103043.3A CN201210103043A CN102619797B CN 102619797 B CN102619797 B CN 102619797B CN 201210103043 A CN201210103043 A CN 201210103043A CN 102619797 B CN102619797 B CN 102619797B
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Abstract
The invention discloses a double-cylinder synchronous hydraulic circuit with functions of supercharging and eliminating an accumulated error. The hydraulic circuit comprises a left oil cylinder, a right oil cylinder, a left oil line A and a right oil line B, wherein the rod cavities of the left and right oil cylinders are divided into three paths after being connected in parallel; one path is connected with the right oil line B, and the other two paths are respectively connected with the control oil ports of two hydraulic control one-way valves by control oil paths; the rodless cavities of the left and right oil cylinders are respectively connected with upper cavities arranged on the lower and upper parts of a synchronous oil cylinder by the arranged hydraulic control one-way valves; after being connected in parallel, lower cavities on the lower and upper parts of the synchronous oil cylinder are connected with the left oil line A; one side of an arranged three-position four-way solenoid directional valve is respectively connected with the left oil line A and the right oil line B; the other side of the arranged three-position four-way solenoid directional valve is respectively connected with the middle cavity and lower cavity of an arranged pressure cylinder; after an oil return check valve is connected between the middle cavity and upper cavity of the pressure cylinder, the middle cavity and upper cavity are connected with the rodless cavity of the right oil cylinder and the oil lines of the hydraulic control one-way valves; a connecting oil line for the rodless cavities of the left and right oil cylinders is connected with a high-pressure electromagnetic ball valve; and a connecting oil line for the high-pressure electromagnetic ball valve and an oil discharging check valve is connected with a pressure transmitter. The double-cylinder synchronous hydraulic circuit has the advantages of good flexibility, high synchronization accuracy and wide application range.
Description
Technical field
The present invention relates to a kind of two-tank method oil hydraulic circuit, especially there is the two-tank method oil hydraulic circuit of supercharging and elimination cumulative error function.
Background technique
In hydraulic system, two or more oil hydraulic cylinder is made to keep relative position or the constant loop of speed to be called synchronizing circuit at the volley.What current commercial Application was many has two-tank method oil hydraulic circuit, from Placement classification, can be divided into twin-tub series connection synchronous hydraulic loop and twin-tub synchronous hydraulic loop in parallel.Common twin-tub series connection synchronous hydraulic loop, be composed in series primarily of two oil hydraulic cylinders, there is the advantage that two-tank method degree is high, as shown in Figure 1, common series connection synchronous hydraulic loop comprises left oil cylinder 1 and right oil cylinder 2, through connecting oil circuit by three-position four-way electromagnetic directional valve 4 after two oil cylinder series connection, wherein between three-position four-way electromagnetic directional valve 4 and left oil cylinder 1, Pilot operated check valve 3 is set.But two serial oil cylinders accuracy of manufacturing require higher; Oil hydraulic pump charge oil pressure is at least two hydraulic cylinder works pressure sums, higher to the requirement of oil hydraulic pump; And two serial oil cylinders have micro-leakage of oil owing to working long hours, and easily produce integrating error.Common twin-tub synchronous hydraulic loop in parallel, primarily of a flow divider-combiner and two oil hydraulic cylinder compositions in parallel, have two oil cylinders bear even load or non-loaded time synchronous, alter by the hole in flow divider-combiner the advantage that cumulative error eliminated by oil, as shown in Figure 2, conventional parallel synchronous hydraulic loop comprises left oil cylinder 5 and right oil cylinder 7, the rodless cavity of left oil cylinder 5 is connected oil circuit A with the rodless cavity of right oil cylinder 7 via Pilot operated check valve 8, and the rod chamber of left oil cylinder 5 is connected oil circuit B with the rod chamber of right oil cylinder 7 via flow divider-combiner 6.But when two oil cylinders bear different loads, and two cylinder loads differ greatly, and when two cylinder load variations are uncertain, synchronous effect is poor, limit the application in twin-tub synchronous hydraulic loop in parallel.
Summary of the invention
The object of this invention is to provide a kind of two-tank method oil hydraulic circuit that there is supercharging and eliminate cumulative error function, especially existing twin-tub two cylinder load differences existing for synchronous hydraulic loop in parallel are solved larger and in uncertain situation, the shortcoming that two oil cylinder synchronization accuracies are poor, by the advantage in the present invention's integrated twin-tub series connection synchronous hydraulic loop and twin-tub synchronous hydraulic loop in parallel, two oil hydraulic cylinder superchargings can also be made simultaneously, and eliminate its cumulative error, high and synchronizing capacity strong, flexible, applied range when bearing fluctuating load of synchronization extent.
For solving above-mentioned technology for topic, a kind of two-tank method oil hydraulic circuit having supercharging and eliminate cumulative error function of the present invention, comprises left oil cylinder, right oil cylinder, left oil circuit A, right oil circuit B; The rod chamber of left oil cylinder and the rod chamber of right oil cylinder also connect Hou Fen tri-tunnel, and a road meets right oil circuit B, and another two-way connects the control port of Pilot operated check valve respectively by oil circuit control; The Pilot operated check valve of rodless cavity through arranging of left oil cylinder connects the synchronous fuel tank bottom epicoele arranged; The Pilot operated check valve of rodless cavity through arranging of right oil cylinder connects synchronous fuel tank top epicoele; Synchronous fuel tank top cavity of resorption, bottom cavity of resorption meet left oil circuit A after connecing; The three-position four-way electromagnetic directional valve side arranged meets left oil circuit A, right oil circuit B respectively, the opposite side of three-position four-way electromagnetic directional valve connects pressurized cylinder lumen, the cavity of resorption of the pressurized cylinder of setting respectively, the lumen of pressurized cylinder be connected return check valve between epicoele after connect the rodless cavity of right oil cylinder and the oil circuit of Pilot operated check valve through oil outlet one-way valve; High-voltage electromagnetic ball valve is connected in the oil circuit that the rodless cavity of described left oil cylinder is connected with the rodless cavity of right oil cylinder, the oil circuit Bonding pressure transmitter that high-voltage electromagnetic ball valve is connected with oil outlet one-way valve, and by pressure transmitter display chamber real-time pressure, when chamber real-time pressure reaches pressure transmitter setting value, three-position four-way electromagnetic directional valve right position work, makes pressurized cylinder reset.
Preferably, two pistons in described synchronous fuel tank arrange built-in one-way valve respectively, but when synchronous fuel tank leakage of oil amount is very little, two pistons can arrange built-in one-way valve.
Compared with prior art, the present invention has following beneficial effect: first, left oil circuit connects the cavity of resorption of synchronous fuel tank upper and lower part, the upper oil cavitie of synchronous fuel tank upper and lower part connects two Pilot operated check valves respectively, and then connect left and right oil cylinder rodless cavity, ensure that left and right oil cylinder has pressure holding function and synchronization extent is high.The second, in the two-piston of synchronized cylinder, built-in one-way valve is housed respectively, left and right oil cylinder is resetted by one-way valve oil return.3rd, left and right oil circuit connects in pressurized cylinder by a three-position four-way electromagnetic directional valve, cavity of resorption, and pressurized cylinder epicoele connects left and right oil cylinder rodless cavity, effectively can give left and right oil cylinder supercharging.4th, the oil circuit on pressurized cylinder, between lumen arranges an one-way valve, ensures that pressurized cylinder can complete pressurization and Rapid reset.5th, the oil circuit between pressurized cylinder epicoele and left and right oil cylinder rodless cavity is arranged an one-way valve, enable left and right oil cylinder pressurize.6th, at an indirect high-voltage electromagnetic ball valve of left and right oil cylinder rodless cavity, contact left and right oil cylinder rodless cavity.7th, left and right oil cylinder connects synchronized cylinder upper and lower part oil pocket respectively by two Pilot operated check valves, left and right oil cylinder is synchronized with the movement, and degree is high, to bear load capacity large, pressurized cylinder and three-position four-way electromagnetic directional valve with the use of, left and right oil cylinder supercharging can be given simultaneously, expand the application area of two-tank method oil hydraulic circuit.8th, left and right oil cylinder connects synchronized cylinder upper and lower part oil pocket respectively by two Pilot operated check valves, realizes left and right oil cylinder and is connected with synchronized cylinder series-parallel connection; Left and right oil cylinder synchronization extent high and when bearing fluctuating load synchronizing capacity strong.9th, pressurized cylinder and three-position four-way electromagnetic directional valve with the use of, left and right oil cylinder supercharging can be given simultaneously; Left and right oil cylinder can reset and eliminate its cumulative error; Synchronous fuel tank can reset in time.Above feature makes oil hydraulic circuit of the present invention have flexible, the superiority such as synchronization accuracy is high, applied range.
Accompanying drawing explanation
Fig. 1 is common series connection synchronous hydraulic circuit theory figure;
Fig. 2 is conventional parallel synchronous hydraulic circuit theory figure;
Fig. 3 is that the present invention has supercharging and eliminates the two-tank method oil hydraulic circuit schematic diagram of cumulative error function;
In figure: 1 left oil cylinder, 2 right oil cylinders, 3 Pilot operated check valves, 4 three-position four-way electromagnetic directional valve, 5 left oil cylinders, 6 flow divider-combiners, 7 right oil cylinders, 8 Pilot operated check valves, 9 left oil cylinders, 10 left jaws, 11 right jaws, 12 right oil cylinders, 13 pressure transmitters, 14 Pilot operated check valves, 15 high-voltage electromagnetic ball valves, 16 built-in one-way valves, 17 synchronous fuel tanks, 18 built-in one-way valves, 19 Pilot operated check valves, 20 oil outlet one-way valves, 21 return check valves, 22 pressurized cylinders, 23 three-position four-way electromagnetic directional valve;
The left cylinder rod chamber of C1, the left oil cylinder rodless cavity of C2, the right oil cylinder rodless cavity of C3, the right cylinder rod chamber of C4, C5 synchronous fuel tank top epicoele, C6 synchronous fuel tank top cavity of resorption, C7 pressurized cylinder epicoele, C8 synchronized cylinder bottom epicoele, C9 pressurized cylinder lumen, C10 synchronized cylinder bottom cavity of resorption, C11 pressurized cylinder cavity of resorption;
In oil circuit shown in Fig. 1, Fig. 2, Fig. 3, solid line represents connection oil circuit, and dotted line represents oil circuit control.
Embodiment
As shown in Figure 3, a kind of two-tank method oil hydraulic circuit having supercharging and eliminate cumulative error function, comprises left oil cylinder 9, right oil cylinder 12, left oil circuit A, right oil circuit B in the present invention; The rod chamber C1 of left the oil cylinder 9 and rod chamber C4 of right oil cylinder 12 also connects Hou Fen tri-tunnel, and a road meets right oil circuit B, and another two-way connects the control port of Pilot operated check valve 14,19 respectively by oil circuit control; The Pilot operated check valve 14 of rodless cavity C2 through arranging of left oil cylinder 9 connects the synchronous fuel tank 17 bottom epicoele C8 arranged; The Pilot operated check valve 19 of rodless cavity C3 through arranging of right oil cylinder 12 connects synchronous fuel tank 17 top epicoele C5; Synchronous fuel tank 17 top cavity of resorption C6, bottom cavity of resorption C10 also meet left oil circuit A after connecing; Three-position four-way electromagnetic directional valve 23 side arranged meets left oil circuit A, right oil circuit B respectively, the opposite side of three-position four-way electromagnetic directional valve 23 connects pressurized cylinder lumen C9, the cavity of resorption C11 of the pressurized cylinder 22 of setting respectively, the lumen C9 of pressurized cylinder 22 be connected return check valve 21 between epicoele C7 after connect the rodless cavity C3 of right oil cylinder 12 and the oil circuit of Pilot operated check valve 19 through oil outlet one-way valve 20; Connect high-voltage electromagnetic ball valve 15 in the oil circuit that the rodless cavity C2 of described left oil cylinder 9 is connected with the rodless cavity C3 of right oil cylinder 12, in the oil circuit that high-voltage electromagnetic ball valve 15 is connected with oil outlet one-way valve 20, connect the pressure transmitter 13 showing chamber real-time pressure He control three-position four-way electromagnetic directional valve 23.
Two pistons in described synchronous fuel tank 17 arrange built-in one-way valve 16,18 respectively.
Have a two-tank method oil hydraulic circuit for supercharging and elimination cumulative error function, its working procedure is as described below:
When left oil cylinder 9, right oil cylinder 12 stretch out, first high-voltage electromagnetic ball valve 15 is disconnected, to cut off contacting of left oil cylinder 9 and right oil cylinder 12, then A oil circuit and left oil circuit oil-feed, to synchronous fuel tank top cavity of resorption C6, bottom cavity of resorption C10 fuel feeding, make synchronous fuel tank top epicoele C5, synchronous fuel tank bottom epicoele C8 respectively by Pilot operated check valve 14,19 to left oil cylinder rodless cavity C2, right oil cylinder rodless cavity C3 fuel feeding, make left oil cylinder 9, right oil cylinder 12 synchronous.The pressure born due to left jaw 10, right jaw 11 is determined according to concrete operating mode, its force value is not definite value, so connect a pressure transmitter 13 on the oil circuit connecting left oil cylinder rodless cavity C2, right oil cylinder rodless cavity C3, namely controlled the work loads of left oil cylinder 9, right oil cylinder 12 by the left oil cylinder rodless cavity C2 of high pressure, the pressure of right oil cylinder rodless cavity C3.When the pressure of left oil cylinder rodless cavity C2, right oil cylinder rodless cavity C3 reaches the setting value of pressure transmitter 13, A oil circuit stops oil-feed, and left oil cylinder 9, right oil cylinder 12 pin and pressurize by two Pilot operated check valves 14,19 and oil outlet one-way valve 20.
If left oil cylinder 9, right oil cylinder 12 need to bear heavy load, and exceed system pressure, namely enough active forces can not be provided by synchronous fuel tank 17.Now implement supercharging by pressurized cylinder 22, the active force between left jaw 10, right jaw 11 is increased.During supercharging, first high-voltage electromagnetic ball valve 15 is made to connect, left oil cylinder rodless cavity C2 and right oil cylinder rodless cavity C3 UNICOM, then A oil circuit fuel feeding, the left position of three-position four-way electromagnetic directional valve 23 is connected, fluid enters pressurized cylinder cavity of resorption C11, then pressurized cylinder epicoele C7 oil liquid pressure raises, high-voltage oil liquid enters left oil cylinder rodless cavity C2, right oil cylinder rodless cavity C3 oil pocket, reach the object of supercharging, simultaneously due to Pilot operated check valve 14, the effect of 19, the left oil cylinder rodless cavity C2 of cutoff high and the synchronous fuel tank bottom epicoele C8 of low pressure, the right oil cylinder rodless cavity C3 of high pressure and the synchronous fuel tank top epicoele C5 of low pressure contacts.Pressurized cylinder lumen C9 fluid is through three-position four-way electromagnetic directional valve 23 left oil returns.Pressurized cylinder epicoele C7 high-voltage oil liquid is cut off and the contacting of pressurized cylinder lumen C9 by return check valve 21.When supercharging reaches setting value, cut off three position four-way electromagnetic valve 23 and A oil circuit by pressure transmitter 13, the left oil cylinder rodless cavity C2 of high pressure, right oil cylinder rodless cavity C3 are by 14,19 and oil outlet one-way valve 20 pressurize of two Pilot operated check valves.
When left oil cylinder 9, right oil cylinder 12 are return, first high-voltage electromagnetic ball valve 15 is allowed to connect, B oil circuit and right oil circuit oil-feed, to left cylinder rod chamber C1, right cylinder rod chamber C4 fuel feeding, Pilot operated check valve 14,19 is opened by oil circuit control, left oil cylinder rodless cavity C2 passes through Pilot operated check valve 14 oil return to synchronous fuel tank bottom epicoele C8, right oil cylinder rodless cavity C3 passes through Pilot operated check valve 19 oil return to synchronous fuel tank top epicoele C5, until left oil cylinder 9, right oil cylinder 12 reset, after depressing respective position limit switch, cut off B oil circuit.
In the process that left oil cylinder 9, right oil cylinder 12 are return, if left oil cylinder 9 first resets, and right oil cylinder 12 does not also reset, at this moment continue by B oil circuit fuel feeding, fluid in right oil cylinder rodless cavity C3 enters in synchronous fuel tank top epicoele C5, synchronous fuel tank bottom epicoele C8 by high-voltage electromagnetic ball valve 15 equilibrium by Pilot operated check valve 14,19, until right oil cylinder 12 also resets, namely respective position limit switch depressed by left oil cylinder 9, right oil cylinder 12, ensure left oil cylinder 9, right oil cylinder 12 resets, oil circuit B could be cut off, thus eliminate the cumulative error of left oil cylinder 9, right oil cylinder 12.
If the fluid in left oil cylinder rodless cavity C2, right oil cylinder rodless cavity C3 could not make synchronous fuel tank 17 reset, now realize synchronous fuel tank 17 by pressurized cylinder 22 and reset.B oil circuit fuel feeding, when left oil cylinder 9, right oil cylinder 12 reset, three-position four-way electromagnetic directional valve 23 is made to be in right position, fluid then in pressurized cylinder epicoele C7 flows in synchronous fuel tank bottom epicoele C8, synchronous fuel tank top epicoele C5 respectively through oil outlet one-way valve 20 and Pilot operated check valve 14,19, and synchronous fuel tank 17 is resetted.When synchronous fuel tank 17 depression stroke switch, three-position four-way electromagnetic directional valve 23 is made to be in meta.
Because pressurized cylinder 22 is in the process making synchronous fuel tank 17 reset, pressurized cylinder epicoele C7 also connects with left oil cylinder rodless cavity C2, right oil cylinder rodless cavity C3, and B oil circuit and right oil circuit communicate with left cylinder rod chamber C1, right cylinder rod chamber C4, piston area due to left oil cylinder rodless cavity C2, right oil cylinder rodless cavity C3 is greater than the piston area of left cylinder rod chamber C1, right cylinder rod chamber C4 respectively, probably make left oil cylinder 9, the reset of right oil cylinder 12 destroyed, although namely synchronous fuel tank 17 resets, and can have fluid in left oil cylinder rodless cavity C2, right oil cylinder rodless cavity C3.Now the oil-feed of B oil circuit can be passed through, connect high-voltage electromagnetic ball valve 15, the fluid in left oil cylinder rodless cavity C2, right oil cylinder rodless cavity C3 is made to flow in synchronous fuel tank bottom epicoele C8, synchronous fuel tank top epicoele C5 by Pilot operated check valve 14,19, then flowing through built-in one-way valve 18,16 enters in synchronous fuel tank bottom cavity of resorption C10, synchronous fuel tank top cavity of resorption C6, finally flow back to fuel tank, realize the reset of left oil cylinder 9, right oil cylinder 12.
Compared with prior art, the present invention has following beneficial effect: first, left oil circuit connects the cavity of resorption of synchronous fuel tank upper and lower part, the upper oil cavitie of synchronous fuel tank upper and lower part connects two Pilot operated check valves respectively, and then connect left and right oil cylinder rodless cavity, ensure that left and right oil cylinder has pressure holding function and synchronization extent is high.The second, in the two-piston of synchronized cylinder, built-in one-way valve is housed respectively, left and right oil cylinder is resetted by one-way valve oil return.3rd, left and right oil circuit connects in pressurized cylinder by a three-position four-way electromagnetic directional valve, cavity of resorption, and pressurized cylinder epicoele connects left and right oil cylinder rodless cavity, effectively can give left and right oil cylinder supercharging.4th, the oil circuit on pressurized cylinder, between lumen arranges an one-way valve, ensures that pressurized cylinder can complete pressurization and Rapid reset.5th, the oil circuit between pressurized cylinder epicoele and left and right oil cylinder rodless cavity is arranged an one-way valve, enable left and right oil cylinder pressurize.6th, at an indirect high-voltage electromagnetic ball valve of left and right oil cylinder rodless cavity, contact left and right oil cylinder rodless cavity.7th, left and right oil cylinder connects synchronized cylinder upper and lower part oil pocket respectively by two Pilot operated check valves, left and right oil cylinder is synchronized with the movement, and degree is high, to bear load capacity large, pressurized cylinder and three-position four-way electromagnetic directional valve with the use of, left and right oil cylinder supercharging can be given simultaneously, expand the application area of two-tank method oil hydraulic circuit.
Left and right oil cylinder connects synchronized cylinder upper and lower part oil pocket respectively by two Pilot operated check valves, realizes left and right oil cylinder and is connected with synchronized cylinder series-parallel connection; Left and right oil cylinder synchronization extent high and when bearing fluctuating load synchronizing capacity strong; Pressurized cylinder and three-position four-way electromagnetic directional valve with the use of, left and right oil cylinder supercharging can be given simultaneously; Left and right oil cylinder can reset and eliminate its cumulative error; Synchronous fuel tank can reset in time.Above feature makes oil hydraulic circuit of the present invention have flexible, the superiority such as synchronization accuracy is high, applied range.
Claims (1)
1. there is a two-tank method oil hydraulic circuit for supercharging and elimination cumulative error function, comprise left oil cylinder (9), right oil cylinder (12), left oil circuit A, right oil circuit B; It is characterized in that, the rod chamber (C1) of left oil cylinder (9) and the rod chamber (C4) of right oil cylinder (12) also connect Hou Fen tri-tunnel, and a road meets right oil circuit B, and another two-way connects the control port of Pilot operated check valve (14), (19) respectively by oil circuit control; The Pilot operated check valve (14) of rodless cavity (C2) through arranging of left oil cylinder (9) connects synchronous fuel tank (17) bottom epicoele (C8) arranged; The Pilot operated check valve (19) of rodless cavity (C3) through arranging of right oil cylinder (12) connects synchronous fuel tank (17) top epicoele (C5); Synchronous fuel tank (17) top cavity of resorption (C6), bottom cavity of resorption (C10) meet left oil circuit A after connecing, two pistons in described synchronous fuel tank (17) arrange built-in one-way valve (16), (18) respectively; Three-position four-way electromagnetic directional valve (23) side arranged meets left oil circuit A, right oil circuit B respectively, the opposite side of three-position four-way electromagnetic directional valve (23) connects pressurized cylinder lumen (C9), the cavity of resorption (C11) of the pressurized cylinder (22) of setting respectively, the lumen (C9) of pressurized cylinder (22) be connected return check valve (21) between epicoele (C7) and connect the rodless cavity (C3) of right oil cylinder (12) and the oil circuit of Pilot operated check valve (19) by oil outlet one-way valve (20); Connect high-voltage electromagnetic ball valve (15) in the oil circuit that the rodless cavity (C2) of described left oil cylinder (9) is connected with the rodless cavity (C3) of right oil cylinder (12), in the oil circuit that high-voltage electromagnetic ball valve (15) is connected with oil outlet one-way valve (20), connect the pressure transmitter (13) showing chamber real-time pressure He control three-position four-way electromagnetic directional valve (23).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210103043.3A CN102619797B (en) | 2012-04-10 | 2012-04-10 | Double-cylinder synchronous hydraulic circuit with functions of supercharging and eliminating accumulated error |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210103043.3A CN102619797B (en) | 2012-04-10 | 2012-04-10 | Double-cylinder synchronous hydraulic circuit with functions of supercharging and eliminating accumulated error |
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| CN102619797A CN102619797A (en) | 2012-08-01 |
| CN102619797B true CN102619797B (en) | 2015-01-07 |
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| CN201210103043.3A Active CN102619797B (en) | 2012-04-10 | 2012-04-10 | Double-cylinder synchronous hydraulic circuit with functions of supercharging and eliminating accumulated error |
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| CN106965016A (en) * | 2017-03-24 | 2017-07-21 | 广东工业大学 | A kind of semi-automatic clamping device |
| CN110228768A (en) * | 2019-05-30 | 2019-09-13 | 江苏智库物流科技有限公司 | A kind of synchronization lifting mechanism of heavy duty four-way shuttle robot |
| CN110744023A (en) * | 2019-10-12 | 2020-02-04 | 宣化钢铁集团有限责任公司 | Hydraulic device for transverse moving of overturning cooling bed of continuous casting machine |
| CN112594251B (en) * | 2020-11-24 | 2023-01-13 | 中国人民解放军96901部队24分队 | Synchronous telescopic multi-stage cylinder with auxiliary cylinder |
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| CN201203530Y (en) * | 2008-03-31 | 2009-03-04 | 上海敏泰液压件有限公司 | Supercharging device of emulsifiable solution valve integrated test stand |
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| CN2031859U (en) * | 1988-05-14 | 1989-02-01 | 郝雄义 | Hydraulic system eliminated hydraulic impaction |
| CN201203530Y (en) * | 2008-03-31 | 2009-03-04 | 上海敏泰液压件有限公司 | Supercharging device of emulsifiable solution valve integrated test stand |
| CN201446174U (en) * | 2009-07-29 | 2010-05-05 | 大连顶金通用设备制造有限公司 | Tri-cylinder four-connecting rod imitating mechanism of flanger with cold spinning sealed head |
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Effective date of registration: 20191224 Address after: 225000 Hongyuan Road, industrial concentration zone, Shaobo Town, Jiangdu District, Yangzhou City, Jiangsu Province Patentee after: Yangzhou Zhi Chuang Enterprise Operation Management Service Co., Ltd. Address before: 225009 No. 88, South University Road, Jiangsu, Yangzhou Patentee before: yangzhou university |
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