CN204061372U - A kind of oil hydraulic cylinder quick-expansion control loop - Google Patents
A kind of oil hydraulic cylinder quick-expansion control loop Download PDFInfo
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- CN204061372U CN204061372U CN201420449676.4U CN201420449676U CN204061372U CN 204061372 U CN204061372 U CN 204061372U CN 201420449676 U CN201420449676 U CN 201420449676U CN 204061372 U CN204061372 U CN 204061372U
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Abstract
The utility model announces a kind of oil hydraulic cylinder quick-expansion control loop.Comprise oil pump, fuel tank, main reversing valve and oil hydraulic cylinder; Rodless cavity oil duct is provided with equilibrium valve, and its left position one-way flow is to oil hydraulic cylinder, two-way circulates in the right position of equilibrium valve; Rod chamber oil duct is provided with pilot operated directional control valve, and a hydraulic fluid port of its pair of hydraulic fluid port side is connected to rodless cavity oil duct, and the hydraulic control chamber of pilot operated directional control valve is connected to rodless cavity oil duct; Between rodless cavity oil duct and fuel tank, be connected to a sequence valve, the hydraulic control chamber of sequence valve is connected to rod chamber oil duct.The utility model, when oil hydraulic cylinder stretches out, makes oil hydraulic cylinder form inner differential circuit and accelerates to stretch out speed; When retracting, the fluid of rodless cavity by sequence valve and the rapid oil sump tank of selector valve, can reduce return pressure loss, accelerates the retraction speed of oil hydraulic cylinder, reduce system energy consumption and fluid temperature rise, have higher practicability greatly.
Description
Technical field
The utility model relates to a kind of oil circuit control of oil hydraulic cylinder, specifically a kind of oil hydraulic cylinder quick-expansion control loop.
Background technique
In the arm support machinery such as current high-altitude operation vehicle, in order to ensure larger thrust, telescopic hydraulic cylinder piston area design very large, and in order to ensure to have after oil hydraulic cylinder stretches out enough rigidity, it is also comparatively thick that its piston rod designs, and this just makes the area ratio of the rodless cavity of oil hydraulic cylinder and rod chamber very large.And the fore and aft motion of oil hydraulic cylinder controls by selector valve.Due to the restriction of the reason such as size, weight, the through-current capacity of selector valve is limited.Cause like this as a result, when oil hydraulic cylinder stretches out, the volume of flow opposing hydraulic cylinder rodless cavity of selector valve supply oil hydraulic cylinder is relatively little, and the speed of stretching out of oil hydraulic cylinder is comparatively slow, does not reach satisfied speed; During oil hydraulic cylinder retraction, because the relation of the area ratio of oil hydraulic cylinder rodless cavity and rod chamber, the recirculating oil quantity of oil hydraulic cylinder is very large, considerably beyond the specified through-current capacity of selector valve, cause the overpressure of very high pressure loss and rodless cavity, the pressure of rodless cavity raises the rising causing rod chamber pressure on the one hand, wastes energy, causes oil liquid temperature to raise too fast, on the other hand, the pressure of rodless cavity raises and even causes relief valve overflow, decreases the flow of selector valve supply oil hydraulic cylinder, causes speed to reduce.
Under current technical specifications, in order to ensure the movement speed improving system under main frame completes the prerequisite of function, usually taking following scheme:
1, increase pump delivery, improve the delivery volume of fluid, and then improve the movement velocity of oil hydraulic cylinder.But this scheme is still limited to the through-current capability of valve.
2, the diameter of oil hydraulic cylinder is reduced.But do the rigidity that can weaken oil cylinder like this, when causing use, amount of deflection is excessive.
3, the through-current capability of selector valve is increased.Selector valve is limited to the factors such as size, and the simple through-current capacity increasing a valve is difficult to.Comparatively feasible way is by increasing a selector valve at present, namely uses two valves to oil hydraulic cylinder fuel feeding.The problem done like this is, high cost.And oil return still will flow back to fuel tank through the duct of valve inside, the pressure loss of oil return is still larger.
Summary of the invention
In order to overcome above-mentioned the deficiencies in the prior art, the utility model provides a kind of oil hydraulic cylinder quick-expansion control loop.
The technological scheme that the utility model adopts is: a kind of oil hydraulic cylinder quick-expansion control loop, comprises oil pump, fuel tank, main reversing valve and oil hydraulic cylinder; Described main reversing valve is connected to oil hydraulic cylinder rodless cavity respectively by rodless cavity oil duct, is connected to oil hydraulic cylinder rod chamber by rod chamber oil duct; Described rodless cavity oil duct is provided with equilibrium valve, and equilibrium valve is a 2/2-way valve, and its left position one-way flow is to oil hydraulic cylinder, two-way circulates in the right position of equilibrium valve; Described rod chamber oil duct is provided with pilot operated directional control valve, and pilot operated directional control valve is a two-position three-way valve, and a hydraulic fluid port of its pair of hydraulic fluid port side is connected to rodless cavity oil duct, and the hydraulic control chamber of pilot operated directional control valve is connected to rodless cavity oil duct; Between rodless cavity oil duct and fuel tank, be connected to a sequence valve, the hydraulic control chamber of sequence valve is connected to rod chamber oil duct, its node with rod chamber oil duct than pilot operated directional control valve near main reversing valve; Main reversing valve is a three position four-way electromagnetic valve, and its Median Function is J type, and the hydraulic fluid port outside it is connected to oil pump, and another is connected to fuel tank.
It is further: described equilibrium valve is a 2/2-way pilot operated directional control valve, and the hydraulic control chamber of equilibrium valve is communicated to described rod chamber oil duct, its node with rod chamber oil duct than pilot operated directional control valve near oil hydraulic cylinder rod chamber.
When oil hydraulic cylinder stretches out, oil hydraulic cylinder forms inner differential circuit, makes oil hydraulic cylinder stretch out speed; When oil hydraulic cylinder is retracted, the fluid in oil hydraulic cylinder rodless cavity is made to flow back to fuel tank through sequence valve and main reversing valve after equilibrium valve, instead of traditionally flow back to fuel tank through main reversing valve, this can accelerate the speed of oil hydraulic cylinder retraction, can also return oil pressure be reduced simultaneously, and then reduce energy ezpenditure and fluid temperature rise.Be specially adapted to the large_sized hydraulic cylinder expansion control loop of large size ratio.
Compared with prior art, the beneficial effects of the utility model are: when oil hydraulic cylinder stretches out, and make oil hydraulic cylinder form inner differential circuit and accelerate to stretch out speed; When retracting, the fluid of rodless cavity by sequence valve and the rapid oil sump tank of selector valve, can reduce return pressure loss, accelerates the retraction speed of oil hydraulic cylinder, reduce system energy consumption and fluid temperature rise, have higher practicability greatly.
Accompanying drawing explanation
Fig. 1 is the utility model structural representation;
Structural representation when Fig. 2 is oil hydraulic cylinder extend action;
Structural representation when Fig. 3 is oil hydraulic cylinder retract action.
In figure: 1, main reversing valve; 2, oil hydraulic cylinder; 3, equilibrium valve; 4, pilot operated directional control valve; 5, sequence valve; 6, fuel tank; 7, rodless cavity oil duct; 8, rod chamber oil duct.
Embodiment
Be below a specific embodiment of the present utility model, existing the utility model is described in further detail by reference to the accompanying drawings.
As shown in Figure 1, a kind of oil hydraulic cylinder quick-expansion control loop, comprises oil pump, fuel tank 6, main reversing valve 1 and oil hydraulic cylinder 2; Main reversing valve 1 is a three position four-way electromagnetic valve, its Median Function is J type, left and right position is straight-through and intersection communicate-type, hydraulic fluid port inside it is connected to oil hydraulic cylinder 2 rodless cavity respectively by rodless cavity oil duct 7, is connected to oil hydraulic cylinder 2 rod chamber by rod chamber oil duct 8, the hydraulic fluid port one in outside is connected to oil pump, and another is connected to fuel tank 6; Equilibrium valve 3 is arranged in rodless cavity oil duct 7, it is a 2/2-way hydraulic control valve, its left position one-way flow is two-way circulated to oil hydraulic cylinder 2, right position, and the hydraulic control chamber of equilibrium valve 3 is communicated to rod chamber oil duct 8, its node with rod chamber oil duct 8 than pilot operated directional control valve 4 near oil hydraulic cylinder 2 rod chamber; Pilot operated directional control valve 4 is arranged in rod chamber oil duct 8, it is a two-bit triplet hydraulic control valve, another hydraulic fluid port of its pair of hydraulic fluid port side is connected to rodless cavity oil duct 7, the hydraulic control chamber of pilot operated directional control valve 4 is connected to rodless cavity oil duct 7, its main reversing valve 1 more close than equilibrium valve 3 with the node of rodless cavity oil duct 7; Sequence valve 5 is connected between rodless cavity oil duct 7 and fuel tank 6, the node of itself and rodless cavity oil duct 7 compares equilibrium valve 3 near near main reversing valve 1, the hydraulic control chamber of sequence valve 5 is connected to rod chamber oil duct 8, its node with rod chamber oil duct 8 than pilot operated directional control valve 4 near main reversing valve 1.When the J type Median Function of main reversing valve 1 ensures that main reversing valve 1 is in meta, the hydraulic control mouth off-load of equilibrium valve 3, ensure simultaneously oil hydraulic cylinder rodless cavity can not with circuit communication.The effect of equilibrium valve 3 is when oil hydraulic cylinder 2 is failure to actuate, and the one-way valve cut-off of equilibrium valve, closes the fluid of oil hydraulic cylinder 2 rodless cavity, ensures that oil hydraulic cylinder 2 bears host machine part weight and do not bounce back; When oil hydraulic cylinder 2 stretches out, be operated in left position; When oil hydraulic cylinder 2 bounces back, be operated in right position, oil return can be passed through smoothly.Sequence valve 5 is the cartridge valve of big orifice, when without pilot pressure effect, the oil circuit of both sides can be disconnected; When there being pilot pressure effect, both sides oil circuit being communicated with, ensureing that the oil return of oil hydraulic cylinder rodless cavity can with less pressure loss oil sump tank 6.
Extend action: as shown in Figure 2, when main reversing valve electromagnet Y1b obtains electric, main reversing valve 1 is operated in left position, and pilot operated directional control valve 4 is operated in left position under the effect of left side high pressure oil.Fluid, through the left position function of main reversing valve 1, through the one-way valve position of the left position function of equilibrium valve 3, enters the rodless cavity of oil hydraulic cylinder 2.Fluid in oil hydraulic cylinder 2 rod chamber is through the left position function of pilot operated directional control valve 4, and the fluid flowed out with main reversing valve 1 converges, and together flows into the rodless cavity of oil hydraulic cylinder.Now, because the hydraulic control mouth of sequence valve 5 is communicated with fuel tank 6, therefore sequence valve 5 is not opened, and ensures to end between pipeline and fuel tank 6.Like this, make oil hydraulic cylinder 2 define inner differential circuit, make it the speed of stretching out and accelerate.
Retracting action: as shown in Figure 3, when the electromagnet Y1a of main reversing valve 1 obtains electric, main reversing valve 1 is operated in right position function.The left side of pilot operated directional control valve 4 is communicated with fuel tank 6, therefore pilot operated directional control valve 4 is operated in right position function under the action of the spring.High-voltage oil liquid is through the right position of main reversing valve 1, and the right position of pilot operated directional control valve 4 enters the rod chamber of oil hydraulic cylinder 2.Meanwhile, high-voltage oil liquid opens equilibrium valve 3, makes it to be operated in right position.High pressure oil makes sequence valve 5 open, and the rodless cavity of oil hydraulic cylinder 2 is communicated with fuel tank 6.Fluid in oil hydraulic cylinder 2 rodless cavity after the right position function of equilibrium valve 3, simultaneously through sequence valve 5 and main reversing valve 1 two-way oil sump tank 6.The through-current capability of sequence valve 5 is much larger compared with selector valve 1, and under the acting in conjunction of two-way, therefore return pressure loss is little, accelerates the retraction speed of oil hydraulic cylinder 2, meanwhile, and then reduces energy consumption and the fluid temperature rise of system.
Claims (2)
1. an oil hydraulic cylinder quick-expansion control loop, comprises oil pump, fuel tank (6), main reversing valve (1) and oil hydraulic cylinder (2); Described main reversing valve (1) is connected to oil hydraulic cylinder (2) rodless cavity respectively by rodless cavity oil duct (7), is connected to oil hydraulic cylinder (2) rod chamber by rod chamber oil duct (8);
It is characterized in that:
Described rodless cavity oil duct (7) is provided with equilibrium valve (3), and equilibrium valve (3) is a 2/2-way valve, and its left position one-way flow is to oil hydraulic cylinder (2), two-way circulates in the right position of equilibrium valve (3);
Described rod chamber oil duct (8) is provided with pilot operated directional control valve (4), pilot operated directional control valve (4) is a two-position three-way valve, a hydraulic fluid port of its pair of hydraulic fluid port side is connected to rodless cavity oil duct (7), and the hydraulic control chamber of pilot operated directional control valve (4) is connected to rodless cavity oil duct (7);
Between rodless cavity oil duct (7) and fuel tank (6), be connected to a sequence valve (5), the hydraulic control chamber of sequence valve (5) is connected to rod chamber oil duct (8), the node main reversing valve (1) more close than pilot operated directional control valve (4) of itself and rod chamber oil duct (8);
Main reversing valve (1) is a three position four-way electromagnetic valve, and its Median Function is J type, and the hydraulic fluid port outside it is connected to oil pump, and another is connected to fuel tank (6).
2. a kind of oil hydraulic cylinder quick-expansion control loop according to claim 1, it is characterized in that: described equilibrium valve (3) is a 2/2-way pilot operated directional control valve, the hydraulic control chamber of equilibrium valve (3) is communicated to described rod chamber oil duct (8), node oil hydraulic cylinder (2) rod chamber more close than pilot operated directional control valve (4) of itself and rod chamber oil duct (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420449676.4U CN204061372U (en) | 2014-08-11 | 2014-08-11 | A kind of oil hydraulic cylinder quick-expansion control loop |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420449676.4U CN204061372U (en) | 2014-08-11 | 2014-08-11 | A kind of oil hydraulic cylinder quick-expansion control loop |
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| CN204061372U true CN204061372U (en) | 2014-12-31 |
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| CN201420449676.4U Expired - Fee Related CN204061372U (en) | 2014-08-11 | 2014-08-11 | A kind of oil hydraulic cylinder quick-expansion control loop |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104675807A (en) * | 2015-03-12 | 2015-06-03 | 徐州重型机械有限公司 | Hydraulic differential control system and method as well as crane |
| CN104912869A (en) * | 2015-06-20 | 2015-09-16 | 苏州蓝王机床工具科技有限公司 | Fast extending and contracting control loop of hydraulic cylinder |
| CN105041745A (en) * | 2015-06-29 | 2015-11-11 | 南阳二机石油装备(集团)有限公司 | Differential control system of double-acting single-stage piston hydraulic cylinder |
| CN106286439A (en) * | 2016-10-27 | 2017-01-04 | 安徽柳工起重机有限公司 | Crane arm cylinder control device |
| CN108730246A (en) * | 2018-08-16 | 2018-11-02 | 宁波联城住工科技有限公司 | The hydraulic control system and material distributing machine of material distributing machine |
| CN109458363A (en) * | 2018-12-19 | 2019-03-12 | 江苏巨威机械有限公司 | Hydraulic pile hammer |
| CN109563850A (en) * | 2016-08-17 | 2019-04-02 | 福伊特专利有限公司 | Hydraulic-driven facility |
| CN109654079A (en) * | 2017-10-12 | 2019-04-19 | 华东交通大学 | The outlet throttling load port separate control valves that full switch valve group is closed |
| CN109779984A (en) * | 2018-12-19 | 2019-05-21 | 广东科立工业技术股份有限公司 | Metal scrap briquetting machine compression hydraulic cylinder control loop |
| CN110778546A (en) * | 2019-11-01 | 2020-02-11 | 三一汽车制造有限公司 | Hydraulic control system, support leg device and control method |
| CN111442008A (en) * | 2020-04-24 | 2020-07-24 | 徐州徐工随车起重机有限公司 | Differential balance valve for controlling extending arm of high-altitude operation vehicle |
| CN113306194A (en) * | 2021-04-23 | 2021-08-27 | 天津中德应用技术大学 | Energy-saving efficient low-noise hydraulic system of press machine |
| CN114278624A (en) * | 2021-12-10 | 2022-04-05 | 南京理工大学 | Closed pump control system of erecting fast |
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2014
- 2014-08-11 CN CN201420449676.4U patent/CN204061372U/en not_active Expired - Fee Related
Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104675807A (en) * | 2015-03-12 | 2015-06-03 | 徐州重型机械有限公司 | Hydraulic differential control system and method as well as crane |
| CN104912869A (en) * | 2015-06-20 | 2015-09-16 | 苏州蓝王机床工具科技有限公司 | Fast extending and contracting control loop of hydraulic cylinder |
| CN105041745A (en) * | 2015-06-29 | 2015-11-11 | 南阳二机石油装备(集团)有限公司 | Differential control system of double-acting single-stage piston hydraulic cylinder |
| CN109563850A (en) * | 2016-08-17 | 2019-04-02 | 福伊特专利有限公司 | Hydraulic-driven facility |
| CN106286439A (en) * | 2016-10-27 | 2017-01-04 | 安徽柳工起重机有限公司 | Crane arm cylinder control device |
| CN109654079B (en) * | 2017-10-12 | 2024-02-20 | 华东交通大学 | Full-switch valve combined outlet throttle load port independent control valve |
| CN109654079A (en) * | 2017-10-12 | 2019-04-19 | 华东交通大学 | The outlet throttling load port separate control valves that full switch valve group is closed |
| CN108730246B (en) * | 2018-08-16 | 2020-05-22 | 广东联城住工装备信息科技有限公司 | Hydraulic control system of material distributing machine and material distributing machine |
| CN108730246A (en) * | 2018-08-16 | 2018-11-02 | 宁波联城住工科技有限公司 | The hydraulic control system and material distributing machine of material distributing machine |
| CN109779984A (en) * | 2018-12-19 | 2019-05-21 | 广东科立工业技术股份有限公司 | Metal scrap briquetting machine compression hydraulic cylinder control loop |
| CN109458363B (en) * | 2018-12-19 | 2024-02-09 | 江苏巨威机械有限公司 | Hydraulic pile driving hammer |
| CN109458363A (en) * | 2018-12-19 | 2019-03-12 | 江苏巨威机械有限公司 | Hydraulic pile hammer |
| CN110778546A (en) * | 2019-11-01 | 2020-02-11 | 三一汽车制造有限公司 | Hydraulic control system, support leg device and control method |
| WO2021082274A1 (en) * | 2019-11-01 | 2021-05-06 | 三一汽车制造有限公司 | Hydraulic control system, outrigger device, and control method |
| CN111442008A (en) * | 2020-04-24 | 2020-07-24 | 徐州徐工随车起重机有限公司 | Differential balance valve for controlling extending arm of high-altitude operation vehicle |
| CN113306194A (en) * | 2021-04-23 | 2021-08-27 | 天津中德应用技术大学 | Energy-saving efficient low-noise hydraulic system of press machine |
| CN113306194B (en) * | 2021-04-23 | 2023-01-24 | 天津中德应用技术大学 | Energy-saving efficient low-noise hydraulic system of press machine |
| CN114278624A (en) * | 2021-12-10 | 2022-04-05 | 南京理工大学 | Closed pump control system of erecting fast |
| CN114278624B (en) * | 2021-12-10 | 2024-05-03 | 南京理工大学 | Closed pump control quick erection system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141231 Termination date: 20150811 |
|
| EXPY | Termination of patent right or utility model |