CN101451922B - Ultra-high pressure high flow supercharging and unloading system - Google Patents
Ultra-high pressure high flow supercharging and unloading system Download PDFInfo
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- CN101451922B CN101451922B CN2008100802172A CN200810080217A CN101451922B CN 101451922 B CN101451922 B CN 101451922B CN 2008100802172 A CN2008100802172 A CN 2008100802172A CN 200810080217 A CN200810080217 A CN 200810080217A CN 101451922 B CN101451922 B CN 101451922B
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Abstract
The invention relates to a superhigh pressure large-traffic pressurizing and unloading system, belonging to a superhigh rapid-loading, unloading hydraulic control system for delivery and type tests of a hydraulic support. The invention mainly solves difficult technical problems about low efficiency of pressurizing loading and unloading in current internal-loading hydraulic support test bench, and about frequency failures caused by large impact on hydraulic elements of the system. The technical proposal employed by the invention is as below: the superhigh pressure large-traffic pressurizing and unloading system includes a hydraulic source, a stop valve and a pressure cylinder, wherein the system further includes a pressure reducing valve, electro-hydraulic reversing valves, a pilot operated check valve, a throttle valve and a check valve, an primary pressure opening of the pressure reducing valve is connected with the hydraulic source via the stop valve, a secondary pressure opening of the pressure reducing valve is connected with an liquid inlet P of the electro-hydraulic reversing valve; an A opening of the electro-hydraulic reversing valve is connected with a low pressure chamber of the pressure cylinder, a low pressure rod chamber of the pressure cylinder, an O opening of the electro-hydraulic reversing valve and an O opening of another electro-hydraulic reversing valve are connected with a liquid supply tank via the stop valve.
Description
Technical field
The present invention relates to a kind of ultra-high pressure high flow supercharging and uninstalling system, it belongs to a kind of and is used for that hydraulic support dispatches from the factory or the UHV (ultra-high voltage) of type approval test loads fast, unloading hydraulic control system.
Background technology
The mode that loads in the hydraulic bracket test-bed general employing is carried out intensity, the durability test of structural member.Require during loading to change the CYCLIC LOADING test by pressure shown in Figure 1, the high energy of its test pressure reaches 70---80MPa, nearly 1000 liters of the cavity volume volumes of some support principal post, for improving loading efficiency, a working cycle has only more than 10 second during general durability test, pressurizes continuously in the so short time, unloads and require high to hydraulic system.The Hydraulic Station feed flow is all adopted in existing loading loop, and the pressurized cylinder supercharging loads, and therefore, this device ubiquity efficient is low, and hydraulic shock is big, problems such as element failure rate height.Pilot system generally adopts the emulsion power pack constant-pressure liquid supply in addition; supercharger ratio is constant; unadjustable; and test pressure difference during the stented test of unit-frame type not; even same content of the test that type is different; on-load pressure requires that a great difference is also arranged, and does not have hydraulic pressure voltage regulation component and voltage-limiting protection measure in the existing systems, easily makes the component wear of system.
Summary of the invention
Supercharging when the objective of the invention is to solve the durability test that loads hydraulic bracket test-bed existence in existing loads, unloading efficient is low and loading, uninstall process are impacted the Hydraulic Elements of system and caused the technical barrier that frequently breaks down greatly, but and the simple long time continuous working of a kind of system, control sensitivity height are provided, adjust easy to maintenance, have automatic protection functions, supercharging load, unloading efficient is high and be applicable to various pressure tests ultra-high pressure high flow supercharging and a uninstalling system.
The present invention solves the problems of the technologies described above the technical scheme that adopts to be: ultra-high pressure high flow supercharging and uninstalling system, comprise hydraulic power source, first stop valve (2), second stop valve (16) and pressurized cylinder (6), wherein: it also comprises reduction valve (3), first electro-hydraulic reversing valve (5), second electro-hydraulic reversing valve (15), first hydraulic control one-way valve (7), second hydraulic control one-way valve (12), throttling valve (13) and retaining valve (14), a pressure port of reduction valve (3) is connected with hydraulic power source through first stop valve (2), the secondary pressure mouth of reduction valve (3) is connected with the inlet P of first electro-hydraulic reversing valve (5), the A mouth of first electro-hydraulic reversing valve (5) is connected with the low-pressure cavity of pressurized cylinder (6), the low pressure rod chamber of pressurized cylinder (6), the O mouth of the O mouth of first electro-hydraulic reversing valve (5) and second electro-hydraulic reversing valve (15) is connected with liquid supply box through second stop valve (16), the inlet P of second electro-hydraulic reversing valve (15) is connected with hydraulic power source through first stop valve (2), the A mouth of second electro-hydraulic reversing valve (15) is connected with the P mouth of first hydraulic control one-way valve (7) and the high pressure chest of pressurized cylinder (6) by retaining valve (14), the A mouth of first hydraulic control one-way valve (7) and first nonspill coupling (8), second nonspill coupling (10) connects, the control mouth K of first hydraulic control one-way valve (7) is connected with the B mouth of first electro-hydraulic reversing valve (5), the B mouth of second electro-hydraulic reversing valve (15) is connected with the control mouth K of nonspill coupling (11) and second hydraulic control one-way valve (12), the high pressure chest of pressurized cylinder (6) is connected with the P mouth of first hydraulic control one-way valve (7), the P mouth of second hydraulic control one-way valve (12) is connected with the inlet of throttling valve (13), the A mouth of second hydraulic control one-way valve (12) and first nonspill coupling (8), second nonspill coupling (10) connects, and the liquid outlet of throttling valve (13) is connected with liquid supply box.
Because the present invention has adopted technique scheme, supercharging loading, the high purpose of unloading efficient have been realized.Therefore, compare with background technology, the present invention has following characteristics:
1, be loaded chamber feed liquor pressurization by hydraulic control one-way valve 7, hydraulic control one- way valve 12,13 times liquid supply box of throttling valve are passed through in the LOADED CAVITY unloading, and topping up loads and return the liquid unloading by different passages, when avoiding unloading each operation valve generation in the Loading Control loop are impacted.
When 2, hydraulic control one-way valve 7 was opened the control mouth, the liquid of unloading can partly enter the pressurized cylinder high pressure chest, makes the pressurized cylinder backhaul, plays the effect of impact damper simultaneously.
3, retaining valve 14 is connected between pressurized cylinder high pressure chest, hydraulic control one-way valve 7 inlets and the electro-hydraulic reversing valve 15, when just supportting, pump pressure can make the pressurized cylinder backhaul simultaneously, to the fluid infusion of pressurized cylinder high pressure chest, play the isolation high-low pressure, the effect of the impact when high pressure when making electro-hydraulic reversing valve not bear loading and unloading.
4, in pressurized cylinder feed liquor loop, electro-hydraulic reversing valve 5 inlets serial connection high-flow pressure reducing valve 3, constant-pressure liquid supply, and the pressure after scalable or the qualification supercharging.
Description of drawings
Fig. 1 is hydraulic bracket test-bed continuous CYCLIC LOADING curve;
Fig. 2 is a hydrostatic control schematic diagram of the present invention.
Embodiment
The present invention is described in further detail below in conjunction with drawings and Examples.
As shown in Figure 2, ultra-high pressure high flow supercharging in the present embodiment and uninstalling system, comprise hydraulic power source (1), stop valve (2), (16) and pressurized cylinder (6), wherein: it also comprises reduction valve (3), electro-hydraulic reversing valve (5), (15), hydraulic control one-way valve (7), (12), throttling valve (13) and retaining valve (14), a pressure port of reduction valve (3) is connected with hydraulic power source (1) through stop valve (2), the secondary pressure mouth of reduction valve (3) is connected with tensimeter (4) with the inlet P of electro-hydraulic reversing valve (5), the A mouth of electro-hydraulic reversing valve (5) is connected with the low-pressure cavity of pressurized cylinder (6), the low pressure rod chamber of pressurized cylinder (6), the O mouth of the O mouth of electro-hydraulic reversing valve (5) and electro-hydraulic reversing valve (15) is connected with liquid supply box through stop valve (16), the inlet P of electro-hydraulic reversing valve (15) is connected with hydraulic power source (1) through stop valve (2), the A mouth of electro-hydraulic reversing valve (15) is connected with the P mouth of hydraulic control one-way valve (7) and the high pressure chest of pressurized cylinder (6) by retaining valve (14), the A mouth of hydraulic control one-way valve (7) and nonspill coupling (8), (10) be connected with tensimeter (9), the control mouth K of hydraulic control one-way valve (7) is connected with the B mouth of electro-hydraulic reversing valve (5), the B mouth of electro-hydraulic reversing valve (15) is connected with the control mouth K of nonspill coupling (11) and hydraulic control one-way valve (12), the high pressure chest of pressurized cylinder (6) is connected with the P mouth of hydraulic control one-way valve (7), the P mouth of hydraulic control one-way valve (12) is connected with the inlet of throttling valve (13), the A mouth of hydraulic control one-way valve (12) and nonspill coupling (8), (10) be connected with tensimeter (9), the liquid outlet of throttling valve (13) is connected with liquid supply box.
The course of work of the present invention is: when loading in certain frame type hydraulic support column is carried out in testing table, nonspill coupling 10 among Fig. 2 is connected with tested bracket upright post cavity of resorption, nonspill coupling 11 connects with tested bracket upright post epicoele, nonspill coupling 8 is a pressure tap, connect pressure unit, the test pressure value is sent to electric-control system, and stop valve 2 is communicated with hydraulic power source 1, and stop valve 16 connects liquid supply box.In a manner described behind the connected system, realize that loading shown in Figure 1, unloading actuation cycle can realize by following control action: electro-hydraulic reversing valve 15 a right energising job, large-flow emulsion enters tested chamber fast through electro-hydraulic reversing valve 15, retaining valve 14 and hydraulic control one-way valve 7, make it to reach pumping plant pressure, it is the t1 stage among Fig. 1, same with this moment, hydraulic fluid also enters the pressurized cylinder high pressure chest, is next step supercharging action topping up; The 15 meta work of t2 stage electro-hydraulic reversing valve, electro-hydraulic reversing valve 5 a right energising job, pumping plant comes liquid to enter pressurized cylinder 6 low-pressure cavity through reduction valve 3 and electro-hydraulic reversing valve 5, high pressure after the supercharging makes the pressure in tested chamber reach required force value through hydraulic control one-way valve 7, the effect of reduction valve 3 is in this process: when the pressurized cylinder pressure ratio is big, be pumping plant pressure when taking advantage of pressure ratio, adjust and limit actual test pressure, i.e. Ps among Fig. 1 by reduction valve 3 far above the force value of testing requirements; Electro- hydraulic reversing valve 5 and 15 is all located meta work, is the t3 stage; Electro-hydraulic reversing valve 15 left side energising job, the high pressure liquid of LOADED CAVITY is unloaded back in the liquid supply box through hydraulic control one-way valve 12, throttling valve 13, and this is the t4 stage among Fig. 1.
Can make electro-hydraulic reversing valve 5 and the position energising of 15 left side during Unloading Control simultaneously, this moment, the part high pressure liquid entered the pressurized cylinder high pressure chest, made the pressurized cylinder backhaul, and pressurized cylinder can play the effect of impact damper.
Claims (1)
1. ultra-high pressure high flow supercharging and uninstalling system, comprise hydraulic power source, first stop valve (2), second stop valve (16) and pressurized cylinder (6), it is characterized in that: further comprising reduction valve (3), first electro-hydraulic reversing valve (5), second electro-hydraulic reversing valve (15), first hydraulic control one-way valve (7), second hydraulic control one-way valve (12), throttling valve (13) and retaining valve (14), a pressure port of reduction valve (3) is connected with hydraulic power source through first stop valve (2), the secondary pressure mouth of reduction valve (3) is connected with the inlet P of first electro-hydraulic reversing valve (5), the A mouth of first electro-hydraulic reversing valve (5) is connected with the low-pressure cavity of pressurized cylinder (6), the low pressure rod chamber of pressurized cylinder (6), the O mouth of the O mouth of first electro-hydraulic reversing valve (5) and second electro-hydraulic reversing valve (15) is connected with liquid supply box through second stop valve (16), the inlet P of second electro-hydraulic reversing valve (15) is connected with hydraulic power source through first stop valve (2), the A mouth of second electro-hydraulic reversing valve (15) is connected with the P mouth of first hydraulic control one-way valve (7) and the high pressure chest of pressurized cylinder (6) by retaining valve (14), the A mouth of first hydraulic control one-way valve (7) and first nonspill coupling (8), second nonspill coupling (10) connects, the control mouth K of first hydraulic control one-way valve (7) is connected with the B mouth of first electro-hydraulic reversing valve (5), the B mouth of second electro-hydraulic reversing valve (15) is connected with the control mouth K of nonspill coupling (11) and second hydraulic control one-way valve (12), the high pressure chest of pressurized cylinder (6) is connected with the P mouth of first hydraulic control one-way valve (7), the P mouth of second hydraulic control one-way valve (12) is connected with the inlet of throttling valve (13), the A mouth of second hydraulic control one-way valve (12) and first nonspill coupling (8), second nonspill coupling (10) connects, and the liquid outlet of throttling valve (13) is connected with liquid supply box.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100802172A CN101451922B (en) | 2008-12-17 | 2008-12-17 | Ultra-high pressure high flow supercharging and unloading system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100802172A CN101451922B (en) | 2008-12-17 | 2008-12-17 | Ultra-high pressure high flow supercharging and unloading system |
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| Publication Number | Publication Date |
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| CN101451922A CN101451922A (en) | 2009-06-10 |
| CN101451922B true CN101451922B (en) | 2010-12-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2008100802172A Expired - Fee Related CN101451922B (en) | 2008-12-17 | 2008-12-17 | Ultra-high pressure high flow supercharging and unloading system |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101979883B (en) * | 2010-10-21 | 2013-01-16 | 武汉科技大学 | Loaded piston deflection test system and test method for large-sized servo hydraulic cylinder |
| CN104422597A (en) * | 2013-08-29 | 2015-03-18 | 深圳市弗赛特检测设备有限公司 | Constant-force loading device of test stand of drilling tool |
| CN105484778B (en) * | 2015-11-27 | 2017-10-20 | 太原科技大学 | A kind of hydraulic support column economizer and control method |
| CN106050804B (en) * | 2016-04-28 | 2018-07-31 | 江西洪都航空工业集团有限责任公司 | A kind of pilot system of hydraulic shock waveform control |
| AU2018200354B2 (en) * | 2017-01-17 | 2023-02-23 | The Raymond Corporation | Variable hydraulic pressure relief systems and methods for a material handling vehicle |
| CN109838424B (en) * | 2017-11-27 | 2024-06-14 | 华澳装备科技(盐城)有限公司 | High-precision mode locking pressure hydraulic control loop and control method |
| EP3722619B1 (en) | 2019-04-11 | 2021-12-15 | Piston Power s.r.o. | Hydraulic pressure amplifier arrangement |
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Assignee: Shanxi Gaohang Hydraulic Inc. Assignor: Taiyuan Univ. of Science & Technology Contract record no.: 2012130000043 Denomination of invention: Ultra-high pressure high flow supercharging and unloading system Granted publication date: 20101215 License type: Exclusive License Open date: 20090610 Record date: 20120401 |
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Granted publication date: 20101215 Termination date: 20121217 |