CN104235091A - Hydraulic control system of anchor chain tension tester - Google Patents
Hydraulic control system of anchor chain tension tester Download PDFInfo
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- CN104235091A CN104235091A CN201410356968.8A CN201410356968A CN104235091A CN 104235091 A CN104235091 A CN 104235091A CN 201410356968 A CN201410356968 A CN 201410356968A CN 104235091 A CN104235091 A CN 104235091A
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Abstract
The invention relates to a hydraulic control system of an anchor chain tension tester. The hydraulic control system comprises a high-pressure pump; an oil outlet of the high-pressure pump is communicated with a hole P of a first reversing valve; a working oil hole A and a working oil hole B of the first reversing valve are respectively communicated with a big cavity and a small cavity of an oil cylinder; the hydraulic control system is characterized by further comprising a low-pressure pump; an oil absorption hole of the low-pressure pump is communicated with an oil tank; an oil outlet of the low-pressure pump is communicated towards the hole P of the first reversing valve by a one-way valve; an unloading valve is arranged between the low-pressure pump and the one-way valve; the opening pressure of the unloading valve is controlled by the pressure at an outlet of the one-way valve; the oil outlet of the high-pressure pump is provided with a pressure regulating hole K of a first stage overflow valve, and the pressure regulating hole K of the first stage overflow valve is communicated with a hole P of a second reversing valve; a hole A and a hole B of the second reversing valve are respectively connected with a second stage overflow valve and a third stage overflow valve; the opening pressure of the first stage overflow valve is greater than that of the unloading valve. According to the hydraulic control system, the high-pressure pump and the low-pressure pump are arranged, and the low-pressure pump is capable of automatically unloading when the pressure of the system is high, so that the system efficiency is improved, and the energy is saved; due to the arrangement of a pressure regulation loop, the system can meet different pressure requirements.
Description
Technical field
The present invention relates to a kind of hydraulic control system of anchor chain lacerating machine, particularly the hydraulic control system of a kind of large pulling force long distance anchor chain lacerating machine, belongs to horizontal tensile testing machine technical field.
Background technique
Tensile testing machine uses hydraulic jack as power executive component, its great advantage is: pulling force is large, stroke is long, and operation controls simple, easy to detect, use safety, therefore be used widely, particularly anchor chain lacerating machine, long between its test tensile region, anchor chain tensile buckling is large, utilizes hydraulic system conveniently to realize.Anchor chain lacerating machine hydraulic system under control gear instruction by hydraulic oil input hydraulic pressure oil cylinder, the movable frame of testing machine is promoted by hydraulic jack, before making to be connected with movable frame, pulling force fixture moves, and the shot shackle be clamped between forward and backward pulling force fixture is applied to the tensile load of setting.Anchor chain connects one section of ground by defeated chain apparatus one section and is delivered continuously in deceleration loading device and carries out pull test, thus completes the pull test of whole anchor chain.
What be generally that pull test Oil cylinder provides pressure oil has two pumps simultaneously worked, and utilize one-way valve to isolate between pump, wherein one is low pressure pump, flow is large, can make oil cylinder piston fast moving, the station of adjustment stretching clamp, for part Rapid stretching provides safeguard; Another is high-pressure service pump, and flow is little, but can provide higher pressure oil, provides power for part stretches.When system works, high-low pump works simultaneously, and when system pressure is greater than the oil pressure relief of low pressure pump setting, high-pressure service pump continues to pressurize to oil cylinder; Low pressure pump stops oil supply oil supply cylinder from the overflow of trend fuel tank, hydraulic oil in a large number with certain pressure passes through relief valve overflow, thus causes hydraulic fluid temperature to raise rapidly, not only increases the oxidation rate of hydraulic oil, and increase the risk of system leak, also cause the waste of the energy simultaneously.
Specify according to anchor chain lacerating machine measurement verification specification, anchor chain lacerating machine not only will carry out measurement verification to extracting in process (anchor chain loading procedure) several force-detecting position increased progressively gradually, also must to extracting several to successively decrease gradually and the force-detecting position identical with anchor chain lacerating machine process carries out measurement verification in anchor chain lacerating machine backhaul (hydraulic jack uninstall process).
During existing anchor chain lacerating machine hydraulic jack backhaul, the direct fast discharging of pressure is to zero, cannot carry out measurement verification to anchor chain lacerating machine backhaul.Look into Chinese patent, " anchor chain lacerating machine deceleration loading device hydraulic system ", the patent No.: 201220633220.4, in the control system of high-pressure service pump, although add one group of A1, A2, A3 etc. to import and export relief valve in parallel, uncontrollable each relief valve works independently.Therefore the measurement verification multiple spot measuring ability of tensile testing machine cannot be realized.
In sum, current anchor chain lacerating machine hydraulic system Problems existing: 1, system is when high pressure, and the spill losses of low pressure pump is large; 2, tensile testing machine can not meet measurement verification needs, realizes detecting the multiple spot of tensile testing machine process and backhaul.
Summary of the invention
The object of the invention is the above-mentioned defect in order to overcome existing for existing anchor chain lacerating machine hydraulic system; There is provided that a kind of structure is simple, the hydraulic control system of reliable operation; This system can make the hydraulic control system of anchor chain lacerating machine when high-pressure work, avoids the spill losses of low pressure pump, and more easily can meet tensile testing machine measurement verification needs, and the multiple spot realizing tensile testing machine process and backhaul detects.
For achieving the above object, the present invention is achieved by the following technical programs.
A kind of hydraulic control system of anchor chain lacerating machine, comprise by high-pressure service pump, the high tension loop of the first selector valve and oil cylinder composition, the inlet port of described high-pressure service pump is communicated with fuel tank, the oil outlet of described high-pressure service pump is communicated with the P mouth of described first selector valve, the actuator port A of described first selector valve, B mouth is communicated with the large loculus of described oil cylinder respectively, also comprise by low pressure pump, the low tension loop of one-way valve and unloading valve composition, the inlet port of described low pressure pump is communicated with described fuel tank, the oil outlet of described low pressure pump, by the P mouth conducting of described one-way valve to described first selector valve, described unloading valve is arranged between described low pressure pump and described one-way valve, the cracking pressure of described unloading valve is by described one-way valved outlet Stress control, the oil outlet of described high-pressure service pump is at least provided with one group by one-level relief valve, the pressure-control circuit of the second selector valve and secondary relief valve and three grades of relief valve compositions, the pressure modulating opening K mouth of described one-level relief valve is communicated with the P mouth of described second selector valve, the A mouth of described second selector valve and B mouth are respectively arranged with described secondary relief valve and described three grades of relief valves, described one-level relief valve, the cracking pressure of secondary relief valve and three grades of relief valves is all greater than the cracking pressure of described unloading valve.
Preferably, described first selector valve is M type three-position four-way valve.
Preferably, described second selector valve is O type three-position four-way valve.
Preferably, be also provided with the first filter between described high-pressure service pump and described fuel tank, between described low pressure pump and described fuel tank, be provided with the second filter.
Preferably, the vent line of described high-pressure service pump is also provided with pressure switch and pressure gauge.
Preferably, the setting pressure that the setting pressure of described three grades of relief valves is less than the setting pressure of described secondary relief valve, the setting pressure of described secondary relief valve is less than described one-level relief valve.
Control principle: system is when starting, system pressure is lower than the cracking pressure of described unloading valve, described high-pressure service pump and described low pressure pump fuel feeding simultaneously, described oil cylinder is made to realize rapid movement, when system pressure is greater than the cracking pressure of described unloading valve, described unloading valve is opened, and described low pressure pump off-load, system is only by described high pressure fuel supply pump.When described first selector valve is in meta, described high-pressure service pump can pass through the direct off-load of its meta M type function, avoids producing spill losses.
When tensile testing machine needs many force-detecting positions measurement verification of the process of carrying out and backhaul, process measurement verification system from low to high, by controlling described second selector valve two, first the oil inlet P mouth of described three grades of relief valves is communicated with the pressure modulating opening K mouth of described one-level relief valve, now the pressure of system is set by described three grades of relief valves, this some detection completes, again by described second selector valve, the oil inlet P mouth of described secondary relief valve two is communicated with the pressure modulating opening K mouth of described one-level relief valve, now system pressure is set by described secondary relief valve, after this some detection completes, described second selector valve is made to get back to meta, now the pressure of system is set by described one-level relief valve, backhaul measurement verification system from high to low, sets one-level relief valve, secondary relief valve and three grades of relief valves by described second selector valve successively just on the contrary, thus realizes many force-detecting positions measurement verification of tensile testing machine process and backhaul.
Advantage of the present invention, by arranging high-low pump, and making low pressure pump can automatic deloading when system high pressure, improve system effectiveness, energy saving, system can be made to meet different pressure requirements by pressure-control circuit simultaneously.
Advantage and disadvantage of the present invention, by for illustration and explanation for the non-limitative illustration passing through preferred embodiment below, these embodiments, only provide as an example with reference to accompanying drawing.
Accompanying drawing explanation
Fig. 1 is the hydraulic control system schematic diagram of anchor chain lacerating machine of the present invention;
In figure: 1, the first filter, 2, high-pressure service pump, the 4, second filter, 5, low pressure pump, 6, one-way valve, 7, unloading valve, 8, the first selector valve, 9, oil cylinder, 10, pressure gauge, 11, pressure meter switch, 12, secondary relief valve, 13, three grades of relief valves, the 15, second selector valve, 16, one-level relief valve, 17, fuel tank.
Embodiment
Below in conjunction with drawings and Examples, the invention will be further described:
As shown in Figure 1, a kind of hydraulic control system of anchor chain lacerating machine, comprise by high-pressure service pump 2, the high tension loop that first selector valve 8 and oil cylinder 9 form, the inlet port of described high-pressure service pump 2 is communicated with fuel tank 17, the oil outlet of described high-pressure service pump 2 is communicated with the P mouth of described first selector valve 8, the actuator port A of described first selector valve 8, B mouth is communicated with the large loculus of described oil cylinder 9 respectively, also comprise by low pressure pump 5, the low tension loop that one-way valve 6 and unloading valve 7 form, the inlet port of described low pressure pump 5 is communicated with described fuel tank 17, the oil outlet of described low pressure pump 5, by the P mouth conducting of described one-way valve 6 to described first selector valve 8, described unloading valve 7 is arranged between described low pressure pump 5 and described one-way valve 6, the cracking pressure of described unloading valve 7 controls by described one-way valve 6 outlet pressure, the oil outlet of described high-pressure service pump 2 is at least provided with one group by one-level relief valve 16, the pressure-control circuit of the second selector valve 15 and secondary relief valve 12 and three grades of relief valve 13 compositions, the pressure modulating opening K mouth of described one-level relief valve 16 is communicated with the P mouth of described second selector valve 15, the A mouth of described second selector valve and B mouth are respectively arranged with described secondary relief valve 12 and described three grades of relief valves 13, described one-level relief valve 16, the cracking pressure of described secondary relief valve 12 and described three grades of relief valves 13 is greater than the cracking pressure of described unloading valve 7.
Described first selector valve 8 is M type three-position four-way valve.
Described second selector valve 15 is O type three-position four-way valve.
Also be provided with the first filter 1 between described high-pressure service pump 2 and described fuel tank 17, between described low pressure pump 5 and described fuel tank 17, be provided with the second filter 4.
The vent line of described high-pressure service pump 2 is also provided with pressure switch 11 and pressure gauge 10.
The setting pressure that setting pressure is less than the setting pressure of described secondary relief valve 12, the setting pressure of described secondary relief valve 12 is less than described one-level relief valve 16 of described three grades of relief valves 13.
Control principle: system is when starting, system pressure is lower than the cracking pressure of described unloading valve 7, described high-pressure service pump 2 and described low pressure pump 5 fuel feeding simultaneously, described oil cylinder 9 is made to realize rapid movement, when system pressure is greater than the cracking pressure of described unloading valve 7, described unloading valve 7 is opened, the off-load of described low pressure pump 5, and system is only by described high-pressure service pump 2 fuel feeding.When described first selector valve 8 is in meta, described high-pressure service pump 2 can pass through the direct off-load of its meta M type function, avoids producing spill losses.
When tensile testing machine needs many force-detecting positions measurement verification of the process of carrying out and backhaul, process measurement verification system from low to high, by controlling described second selector valve 15, first the oil inlet P mouth of described three grades of relief valves 13 is communicated with the pressure modulating opening K mouth of described one-level relief valve 16, now the pressure of system is set by described three grades of relief valves 13, this some detection completes, again by described second selector valve 15, the oil inlet P mouth of described secondary relief valve 12 is communicated with the pressure modulating opening K mouth of described one-level relief valve 16, now system pressure is set by described secondary relief valve 12, after this some detection completes, described second selector valve 15 is made to get back to meta, now the pressure of system is set by described one-level relief valve 16, backhaul measurement verification system from high to low, just sets one-level relief valve 16, secondary relief valve 12 and three grades of relief valves 13 successively by described second selector valve 15 on the contrary, thus realizes many force-detecting positions measurement verification of tensile testing machine process and backhaul.
In addition to the implementation, the present invention can also have other mode of executions.All employings are equal to the technological scheme of replacement or equivalent transformation formation, all drop in the protection domain of application claims.
Claims (6)
1. the hydraulic control system of an anchor chain lacerating machine, comprise by high-pressure service pump (2), the high tension loop that first selector valve (8) and oil cylinder (9) form, the inlet port of described high-pressure service pump (2) is communicated with fuel tank (17), the oil outlet of described high-pressure service pump (2) is communicated with the P mouth of described first selector valve (8), the actuator port A of described first selector valve (8), B mouth is communicated with the large loculus of described oil cylinder (9) respectively, it is characterized in that: also comprise by low pressure pump (5), the low tension loop that one-way valve (6) and unloading valve (7) form, the inlet port of described low pressure pump (5) is communicated with described fuel tank (17), the oil outlet of described low pressure pump (5), by the P mouth conducting of described one-way valve (6) to described first selector valve (8), described unloading valve (7) is arranged between described low pressure pump (5) and described one-way valve (6), the cracking pressure of described unloading valve (7) controls by described one-way valve (6) outlet pressure, the oil outlet of described high-pressure service pump (2) is at least provided with one group by one-level relief valve (16), the pressure-control circuit that second selector valve (15) and secondary relief valve (12) and three grades of relief valves (13) form, the pressure modulating opening K mouth of described one-level relief valve (16) is communicated with the P mouth of described second selector valve (15), the A mouth of described second selector valve and B mouth are respectively arranged with described secondary relief valve (12) and described three grades of relief valves (13), described one-level relief valve (16), the cracking pressure of secondary relief valve (12) and described three grades of relief valves (13) is all greater than the cracking pressure of described unloading valve (7).
2. the hydraulic control system of a kind of anchor chain lacerating machine as claimed in claim 1, is characterized in that: described first selector valve (8) is M type three-position four-way valve.
3. the hydraulic control system of a kind of anchor chain lacerating machine as claimed in claim 1, is characterized in that: described second selector valve (15) is O type three-position four-way valve.
4. the hydraulic control system of a kind of anchor chain lacerating machine as claimed in claim 1, it is characterized in that: between described high-pressure service pump (2) and described fuel tank (17), be also provided with the first filter (1), between described low pressure pump (5) and described fuel tank (17), be provided with the second filter (4).
5. the hydraulic control system of a kind of anchor chain lacerating machine as claimed in claim 1, is characterized in that: the vent line of described high-pressure service pump (2) is also provided with pressure switch (11) and pressure gauge (10).
6. the hydraulic control system of a kind of anchor chain lacerating machine as claimed in claim 1, is characterized in that: the setting pressure that setting pressure is less than the setting pressure of described secondary relief valve (12), the setting pressure of described secondary relief valve (12) is less than described one-level relief valve (16) of described three grades of relief valves (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410356968.8A CN104235091A (en) | 2014-07-24 | 2014-07-24 | Hydraulic control system of anchor chain tension tester |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410356968.8A CN104235091A (en) | 2014-07-24 | 2014-07-24 | Hydraulic control system of anchor chain tension tester |
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| CN104235091A true CN104235091A (en) | 2014-12-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410356968.8A Pending CN104235091A (en) | 2014-07-24 | 2014-07-24 | Hydraulic control system of anchor chain tension tester |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105570208A (en) * | 2015-12-19 | 2016-05-11 | 嘉善海力达工具有限公司 | Noise-reducing dual-circuit oil pump |
| CN113417907A (en) * | 2021-05-14 | 2021-09-21 | 天津市天锻压力机有限公司 | Auxiliary oil way pressure relief system for handling internal residual pressure of quick-insertion device and allowing plugging and unplugging |
| CN113586539A (en) * | 2021-06-19 | 2021-11-02 | 上海众丞精密机械有限公司 | Control valve group and oil supply valve group |
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| CN201421400Y (en) * | 2009-04-29 | 2010-03-10 | 江苏科技大学 | Loading device of tension tester |
| CN102507169A (en) * | 2011-10-21 | 2012-06-20 | 舟山中南锚链有限公司 | Novel anchor chain tensile testing machine |
| CN202956315U (en) * | 2012-11-27 | 2013-05-29 | 亚星（镇江）系泊链有限公司 | Hydraulic system of loading device of anchor chain tension tester |
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2014
- 2014-07-24 CN CN201410356968.8A patent/CN104235091A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201421400Y (en) * | 2009-04-29 | 2010-03-10 | 江苏科技大学 | Loading device of tension tester |
| CN102507169A (en) * | 2011-10-21 | 2012-06-20 | 舟山中南锚链有限公司 | Novel anchor chain tensile testing machine |
| CN202956315U (en) * | 2012-11-27 | 2013-05-29 | 亚星（镇江）系泊链有限公司 | Hydraulic system of loading device of anchor chain tension tester |
Non-Patent Citations (2)
| Title |
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| 冯志君等: "关于多级调压回路的分析", 《液压与气动》 * |
| 王积伟等: "《液压与气压传动》", 30 June 2005, 机械工业出版社 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105570208A (en) * | 2015-12-19 | 2016-05-11 | 嘉善海力达工具有限公司 | Noise-reducing dual-circuit oil pump |
| CN113417907A (en) * | 2021-05-14 | 2021-09-21 | 天津市天锻压力机有限公司 | Auxiliary oil way pressure relief system for handling internal residual pressure of quick-insertion device and allowing plugging and unplugging |
| CN113586539A (en) * | 2021-06-19 | 2021-11-02 | 上海众丞精密机械有限公司 | Control valve group and oil supply valve group |
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Application publication date: 20141224 |