CN102628457B - Open type hydraulic system for small-volume concrete mixing and transporting truck - Google Patents
Open type hydraulic system for small-volume concrete mixing and transporting truck Download PDFInfo
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- CN102628457B CN102628457B CN201210107566.5A CN201210107566A CN102628457B CN 102628457 B CN102628457 B CN 102628457B CN 201210107566 A CN201210107566 A CN 201210107566A CN 102628457 B CN102628457 B CN 102628457B
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Abstract
The invention discloses an open type hydraulic system for a small-volume concrete mixing and transporting truck. The open type hydraulic system comprises a hydraulic gear pump, a one-way valve, an overflow valve, a pressure reducing valve, a hydraulic control one-way valve, a speed regulating valve, a filter, a reversing motor and an engine, wherein the output end of the engine is connected with the input end of the hydraulic gear pump; the output end of the hydraulic gear pump is connected with the one-way valve and then is shunted into two paths; one path is connected with the overflow valve and the other path is connected with the pressure reducing valve and then is shunted into a main line and a branch line; the main line is connected with the reversing motor through one oil path of a three-position and four-way valve; the reversing motor returns oil through another oil path of the three-position and four-way valve; and the branch line is connected with a two-position and two-way electromagnetic valve and then is connected with the hydraulic control one-way valve and the speed regulating valve in parallel and is connected with the input end of the filter. The open type hydraulic system for the small-volume concrete mixing and transporting truck, which is disclosed by the invention, has the advantages of simple structure, excellent heat radiation effect, low cost and low requirement on the maintenance cost.
Description
Technical field
The present invention relates to a kind of open type hydraulic system, particularly relate to a kind of open type hydraulic system of little side's amount concrete mixing and transporting car, belong to agitator truck hydraulic system technical field.
Background technique
At present, concrete mixing and transporting car has been widely used in building, bridge, large water conservancy hydroelectric engineering, and concrete mixing and transporting car needs on chassis special, carry out design repacking can adapt to different construction environments.When road conditions is good, transit mixer is to generous amount, chassis special development, but the area that particularly road environment is severe in mountain area, the applicability of this generous amount transit mixer is not good, and mountain road badly causes generous amount transit mixer to adapt to.For this reason, little side's amount transit mixer arises, but existing little side's amount transit mixer adopts the hydraulic system of import mostly, this Costco Wholesale causing little side to measure transit mixer remains high always, when auxiliary component needs to change, the auxiliary equipment follow-up of import can cause construction delay not in time, causes great economic loss to engineering.
In addition, existing little side's amount transit mixer adopts closed system mostly, its structure as shown in Figure 1, in existing closed system: hydraulic oil is converted to pressure oil and exports by two-way variable displacement plunger pump 1-3, pressure oil directly enters two-way hydraulic motor 1-12 by pipeline, drive retarder 1-1 by oil hydraulic motor 1-12, thus drive mixing drum 1-2 to realize clockwise and anticlockwise; The low pressure oil return of oil hydraulic motor 1-12 directly enters the intake side of two-way variable displacement pump 1-3, thus realizes the periodic duty of whole system.Gear pump 1-5 provide hydraulic oil as slippage pump to system, and hydraulic oil is become pressure oil by filter and enters low voltage side by it from fuel tank; Relief valve 1-7 ensures that oil compensation pressure is greater than main system low-pressure lateral pressure, and relief valve 1-6 provides the power needed for two-way variable displacement plunger pump 1-3 commutation, and the positive and negative of bidirectional plunger variable pump 1-3 is realized by three-dimensional four-way hand-operated direction valve 1-4.One group of one-way valve 1-8 mono-aspect prevents high pressure oil from entering impact slippage pump 1-5, also can realize slippage pump 1-5 pressure oil output in addition and enter system low-voltage side; The bidirectional protective of one group of relief valve 1-9 realization to whole system, antioverloading, flushing valve 1-11 and relief valve 1-10 realizes the process of changing oil of system; In addition, the leakage passage of reversing motor 1-12 and two-way variable displacement plunger pump 1-3 gets back to fuel tank by filter 1-1.
Existing closed system has the following disadvantages:
1) poor heat radiation, cannot work long hours;
2) closed system is once work long hours, and temperature rise is very fast, and oil temperature height will cause oil product pressure actuation unstable, cause hydraulic element leakage rate to increase, and all cause bad impact to sealing etc.;
3) large multiple component is import parts, expensive; When damage of components needs to change, not in time supporting, bring economic loss;
4) whole system is complicated, and require high to attendant, maintenance cost is high.
Summary of the invention
The object of the invention is to: the open type hydraulic system that a kind of little side's amount concrete mixing and transporting car is provided, solve the poor heat radiation of existing little side's amount car existence, cannot work long hours, once work long hours, hydraulic element leakage rate increases, and causes bad impact to sealing etc.; And system complex, the technical problem that expensive, maintenance cost is high, thus can effectively solve above-mentioned problems of the prior art.
The object of the invention is to be realized by following technical proposals: a kind of open type hydraulic system of little side's amount concrete mixing and transporting car, comprise hydraulic gear pump, one-way valve, relief valve, reduction valve, Pilot operated check valve, series flow control valve, filter, reversing motor and motor, the output terminal of motor is connected with the input end of hydraulic gear pump, mekydro delivery side of pump is divided into two-way after connecting an one-way valve, one tunnel connects relief valve, another road is divided into main line and branch road after connecting reduction valve, described main line connects reversing motor by a wherein oil circuit of three position four-way electromagnetic valve, reversing motor is by another oil circuit oil return of three position four-way electromagnetic valve, after described branch road connects a two-position two-way solenoid valve, Pilot operated check valve in parallel and series flow control valve, be connected with the input end of filter again.
As a kind of optimal way, one of described reversing motor exports termination speed reducer, another termination mixing drum of speed reducer, and described reversing motor drives speed reducer to drive mixing drum.
As further preferred embodiment, described two-position two-way solenoid valve controls Pilot operated check valve, two-position two-way solenoid valve power-off, and system oil return is by getting back to fuel tank through filter after series flow control valve; Two-position two-way solenoid valve is energized, and system oil return is by getting back to fuel tank through filter after Pilot operated check valve.
In the present invention, the effect of part is as follows:
Reversing motor: reversing motor drives speed reducer can realize rotating and reverse, and drives rotating and reverse of mixing drum.
Motor: hydraulic oil is converted to pressure oil and exports by driven gear pump.
One-way valve: rise and prevent pressure oil from refluxing, the effect of protection gear pump, pressure oil is by disposing pressure pulsation through reduction valve after one-way valve again, and it is steady that the fluctuating pressure oil that gear pump is provided becomes.
Bi-bit bi-pass solenoid directional control valve: pilot pressure controls the break-make of oil, realizes the opening and closing of Pilot operated check valve.
Three position four-way electromagnetic valve: realize motor forward and counterrotating, thus charging and the discharging that can realize mixing drum.
Relief valve: the effect playing system pressure setting and protective system.
Series flow control valve: the low speed rotation that can realize mixing drum.
Pilot operated check valve: when opening: the full speed realizing mixing drum rotates, time closed: the low speed rotation realizing mixing drum together with series flow control valve.
Compared with prior art, beneficial effect of the present invention: the open type hydraulic system of the present invention's little side's amount concrete mixing and transporting car, its system architecture is simple, good, low cost of manufacture of dispelling the heat, and requires low, specifically, possess following advantage to maintenance cost:
1), this hydraulic system is open system, and radiating condition and radiating effect are all better than closed system, the special long-time construction adapting to rugged environment;
2), this hydraulic system may be used for non-stirred car chassis special and reequips, reduction chassis purchase cost;
3), the system of this hydraulic system is simple, cost is low, adopts spare part in common use, when needing to change component, can be in time supporting, and reduce the loss.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of existing closed system;
Fig. 2 is the schematic diagram of open type hydraulic system of the present invention.
In Fig. 2: hydraulic gear pump-1, one-way valve-2, reduction valve-3, bi-bit bi-pass solenoid directional control valve-4, three position four-way electromagnetic valve-5, reversing motor-6, relief valve-7, series flow control valve-8, Pilot operated check valve-9, filter-10, motor-11, speed reducer-12, mixing drum-13.
Embodiment
Below in conjunction with specific embodiments and the drawings, the present invention is further illustrated.
All features disclosed in this specification, or the step in disclosed all methods or process, except the speciality mutually repelled and/or step, all can combine by any way, unless specifically stated otherwise, all can be replaced by other equivalences or the alternative features with similar object, namely, unless specifically stated otherwise, an embodiment in a series of equivalence of each feature or similar characteristics.
As shown in Figure 2, the open type hydraulic system of the present invention's little side's amount concrete mixing and transporting car comprises hydraulic gear pump 1, one-way valve 2, relief valve 7, reduction valve 3, Pilot operated check valve 9, series flow control valve 8, filter 10, reversing motor 6 and motor 11, and described reversing motor 6 drives speed reducer 12 to drive mixing drum 13.The output terminal of motor 11 is connected with the input end of hydraulic gear pump 1, and hydraulic oil is converted to pressure oil and exports by motor 11 driven gear pump 1.Two-way is divided into after the output terminal of hydraulic gear pump 1 connects an one-way valve 2; one tunnel connects relief valve 7; another road is divided into main line and branch road after connecting reduction valve 3; one-way valve 2 plays and prevents pressure oil from refluxing; the effect of protection gear pump 1; pressure oil is by disposing pressure pulsation through reduction valve 3 after one-way valve 2 again, and it is steady that the fluctuating pressure oil that gear pump is provided becomes.Described main line connects reversing motor 6 by a wherein oil circuit of three position four-way electromagnetic valve 5, is provided the moment of torsion driving mixing drum to rotate by motor.Reversing motor 6 is by another oil circuit oil return of three position four-way electromagnetic valve 5, one of described reversing motor 6 exports termination speed reducer 12, another termination mixing drum 13 of speed reducer 12, reversing motor 6 drives speed reducer 12 can realize rotating and reverse, and drives rotating and reverse of mixing drum 13.After described branch road connects a two-position two-way solenoid valve 4, Pilot operated check valve 9 in parallel and series flow control valve 8, be connected with the input end of filter 10 again, wherein, described series flow control valve 8 can realize transit mixer newly enter in stirring at a slow speed, the high speed that the Pilot operated check valve 9 of opening state can realize transit mixer charging and discharging is stirred.Specifically, described two-position two-way solenoid valve 4 controls Pilot operated check valve 9, two-position two-way solenoid valve 4 power-off, and system oil return is by getting back to fuel tank through filter 10 after series flow control valve 8; Two-position two-way solenoid valve 4 is energized, and system oil return is by getting back to fuel tank through filter 10 after Pilot operated check valve 9.
Working principle of the present invention is as follows:
The oil return of closed system directly enters plunger pump without cooling; And the oil return of open system will by pipeline and fuel tank cooling, so better heat-radiation effect, in addition, because the structural design of closed system is very compact, cause heat radiation not in time, and open system due to space layout openr, so be easy to realize with the heat exchange of external environment, therefore show that this open system possesses the radiating effect better than closed system.
The open type hydraulic system of this little side's amount concrete mixing and transporting car is mainly for railway, bridge and culvert, and manufacturing cost and use cost is low.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (3)
1. the open type hydraulic system of one kind little side's amount concrete mixing and transporting car, comprise hydraulic gear pump (1), one-way valve (2), relief valve (7), reduction valve (3), Pilot operated check valve (9), series flow control valve (8), filter (10), reversing motor (6) and motor (11), it is characterized in that: the output terminal of motor (11) is connected with the input end of hydraulic gear pump (1), two-way is divided into after the output terminal of hydraulic gear pump (1) connects an one-way valve (2), one tunnel connects relief valve (7), another road is divided into main line and branch road after connecting reduction valve (3), described main line connects reversing motor (6) by a wherein oil circuit of three position four-way electromagnetic valve (5), reversing motor (6) is by another oil circuit oil return of three position four-way electromagnetic valve (5), after described branch road connects a two-position two-way solenoid valve (4), Pilot operated check valve (9) in parallel and series flow control valve (8), be connected with the input end of filter (10) again.
2. the open type hydraulic system of little side's amount concrete mixing and transporting car as claimed in claim 1, it is characterized in that: one of described reversing motor (6) exports termination speed reducer (12), another termination mixing drum (13) of speed reducer (12), described reversing motor 6 drives speed reducer (12) to drive mixing drum (13).
3. the open type hydraulic system of the little side's amount concrete mixing and transporting car as described in claim arbitrary in claim 1 or 2, it is characterized in that: described two-position two-way solenoid valve (4) controls Pilot operated check valve (9), two-position two-way solenoid valve (4) power-off, system oil return gets back to fuel tank by after series flow control valve (8) through filter (10); Two-position two-way solenoid valve (4) is energized, and system oil return gets back to fuel tank by after Pilot operated check valve (9) through filter (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210107566.5A CN102628457B (en) | 2012-04-13 | 2012-04-13 | Open type hydraulic system for small-volume concrete mixing and transporting truck |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210107566.5A CN102628457B (en) | 2012-04-13 | 2012-04-13 | Open type hydraulic system for small-volume concrete mixing and transporting truck |
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| Publication Number | Publication Date |
|---|---|
| CN102628457A CN102628457A (en) | 2012-08-08 |
| CN102628457B true CN102628457B (en) | 2015-03-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210107566.5A Expired - Fee Related CN102628457B (en) | 2012-04-13 | 2012-04-13 | Open type hydraulic system for small-volume concrete mixing and transporting truck |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102852870B (en) * | 2012-08-20 | 2015-09-09 | 三一重工股份有限公司 | Open type hydraulic system and engineering machinery |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003301802A (en) * | 2002-02-06 | 2003-10-24 | Kayaba Ind Co Ltd | Truck mixer agitator |
| JP2007278430A (en) * | 2006-04-10 | 2007-10-25 | Shin Meiwa Ind Co Ltd | Mixer drum driving device for truck mixer |
| JP4851851B2 (en) * | 2006-06-02 | 2012-01-11 | カヤバ工業株式会社 | Mixer drum drive device |
| CN100520087C (en) * | 2008-01-09 | 2009-07-29 | 浙江大学 | Rotating speed variable driving shield cutterhead energy-saving hydraulic control system |
| CN201843618U (en) * | 2010-11-15 | 2011-05-25 | 南车资阳机车有限公司 | Cutter disc driving open type hydraulic system of small-size shield machine |
| CN102373932A (en) * | 2011-09-22 | 2012-03-14 | 南车资阳机车有限公司 | Open-type hydraulic system for driving screw conveyer on miniature shield machine |
| CN202545387U (en) * | 2012-04-13 | 2012-11-21 | 成都市新筑路桥机械股份有限公司 | Opened type hydraulic system of small-earthwork-capacity concrete mixing transportation vehicle |
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2012
- 2012-04-13 CN CN201210107566.5A patent/CN102628457B/en not_active Expired - Fee Related
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Granted publication date: 20150311 |