CN205134412U - Loader work hydraulic system with automatic locking function - Google Patents
Loader work hydraulic system with automatic locking function Download PDFInfo
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- CN205134412U CN205134412U CN201520755085.4U CN201520755085U CN205134412U CN 205134412 U CN205134412 U CN 205134412U CN 201520755085 U CN201520755085 U CN 201520755085U CN 205134412 U CN205134412 U CN 205134412U
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Abstract
The utility model discloses a loader work hydraulic system with automatic locking function, including hydraulic tank, oil return filter core, radiator, orifice, double pump, distribution valve, bucket -turning oil cylinder, tipping bucket lock valve, boom cylinder, swing arm lock valve, check valve, pilot valve, ball valve and pressure selection valve, the utility model discloses a boom cylinder and bucket -turning oil cylinder at equipment do not have the lock valve that the pole chamber increases the liquid accuse, prevent that pipeline blasting or distribution valve from leaking the equipment who leads to and subsiding, the lock valve adopts the control of hydraulic pressure guide to adopt cartridge formula structure, loss of pressure is little, reduces simultaneously and leaks, adopt the control of outside guide's oil circuit, the engine has automatic locking function, prevent misuse when flame -out, the adoption guide of this system locking ball valve prevents to miss and bumps the malfunction that guide's handle results in, improves the security of complete machine work.
Description
Technical field
The utility model relates to a kind of construction machinery hydraulic system, specifically a kind of loader hydraulic system of working with automatic locking function.
Background technology
Engineering machinery purposes is extremely extensive, and different purposes and complicated operating mode determine the complexity of its hydraulic work system.Under some requires the operating mode of high reliability, high security, must guarantee that the settling amount of equipment is little as far as possible, and there is safe lock function.
Hydraulic system of working many employings guiding valve of existing loader controls, and the meta of guiding valve leaks can not be avoided, and is subject to the impact of hydraulic fluid temperature, oil cylinder working-pressure.When loader is used for plug-in mounting operating mode by user, due to the existence revealed, equipment meta keeps effect poor, can not meet instructions for use.And because valve rod is in the wearing and tearing of use procedure, leakage rate can be increasing.If occur flexible pipe or hard tube leakage of oil in use procedure, or occur maloperation, equipment can be in runaway condition, causes unexpected security incident.
Prior art many employings hydraulic lock realizes equipment and keeps function, but Normal hydraulic lock energy loss is comparatively large, is unfavorable for energy saving of system.
Summary of the invention
For above-mentioned prior art Problems existing, the utility model provides a kind of loader hydraulic system of working with automatic locking function, prevent pipeline explosion or distributing valve from leaking the equipment sedimentation caused, only touch the misoperation that pilot handle causes by mistake, improve the safety of complete machine work.
To achieve these goals, a kind of loader hydraulic system of working with automatic locking function of the utility model, comprises hydraulic oil container, oil return filter core, radiator, throttle orifice, duplex pump, distributing valve, dump ram, tipping bucket lock valve, boom cylinder, swing arm lock valve, one way valve, pilot valve, ball valve, pressure selection valve; Described duplex pump inlet port is connected with hydraulic oil container, and duplex pump first oil-out is connected with distributing valve P1 hydraulic fluid port, and duplex pump second oil-out is connected with the second oil-in of pressure selection valve through one way valve, and the leakage hydraulic fluid port of duplex pump is connected with hydraulic oil container; The A1 hydraulic fluid port of described distributing valve is connected with the a1 hydraulic fluid port of pilot valve, A2 hydraulic fluid port is connected with the a2 hydraulic fluid port of pilot valve, B1 hydraulic fluid port is connected with the b1 hydraulic fluid port of pilot valve, B2 hydraulic fluid port is connected with the b2 hydraulic fluid port of pilot valve, and C2 hydraulic fluid port is connected with the 2C hydraulic fluid port of pilot valve, and D1 hydraulic fluid port is connected with the D3 hydraulic fluid port of tipping bucket lock valve, D2 hydraulic fluid port is connected with the rod chamber of dump ram, E1 hydraulic fluid port is connected with the E3 hydraulic fluid port of swing arm lock valve, and E2 hydraulic fluid port is connected with the rod chamber of boom cylinder, and T1 hydraulic fluid port is connected with the oil-in of radiator; The oil-out of described radiator is connected with hydraulic oil container through oil return filter core; Described throttle orifice is in parallel with radiator; The control port of described tipping bucket lock valve is connected with the B1 hydraulic fluid port of distributing valve, and leak hydraulic fluid port D5 and be connected with hydraulic oil container, D4 hydraulic fluid port is connected with the rodless cavity of dump ram; The control port of described swing arm lock valve is connected with the B2 hydraulic fluid port of distributing valve, and leak hydraulic fluid port E5 and be connected with hydraulic oil container, E4 hydraulic fluid port is connected with the rodless cavity of boom cylinder; The leakage hydraulic fluid port of described pressure selection valve is connected with hydraulic oil container; The leakage hydraulic fluid port of described pilot valve is connected with hydraulic oil container.
Further as the utility model, described tipping bucket lock valve, swing arm lock valve adopt Hydraulic guide control, and adopt plug-in structure, and the pressure loss is little, simultaneously good sealing effect.
Further as the utility model, adopt tipping bucket connection pilot pressure oil and swing arm decline connection pilot pressure oil to control the unlatching of described tipping bucket lock valve, swing arm lock valve.
Further as the utility model, the first oil-in of described pressure selection valve is blocked.
Compared with prior art, the utility model has the advantages that:
(1) boom cylinder of the utility model employing at equipment and the lock valve of dump ram rodless cavity increase hydraulic control, prevent pipeline explosion or distributing valve from leaking the equipment sedimentation caused;
(2) lock valve adopts Hydraulic guide control, and adopts plug-in structure, and the pressure loss is little, reduces leakage simultaneously;
(3) adopt external pilot oil circuit to control, there is during engine misses automatic locking function, prevent maloperation;
(4) this system misoperation of adopting guide locking ball valve to prevent from by mistake touching pilot handle to cause, improves the safety of complete machine work.
Accompanying drawing explanation
Fig. 1 is hydraulic system principle figure of the present utility model;
In figure: 1, hydraulic oil container 2, oil return filter core, 3, radiator, 4, throttle orifice, 5, duplex pump, 6, distributing valve, 7, dump ram, 8, tipping bucket lock valve, 9, boom cylinder, 10, swing arm lock valve, 11, one way valve, 12, pilot valve, 13, ball valve, 14, pressure selection valve.
Detailed description of the invention
In order to make those skilled in the art person understand the utility model scheme better, below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
As shown in Figure 1, the utility model has the loader hydraulic system of working of automatic locking function, comprises hydraulic oil container 1, oil return filter core 2, radiator 3, throttle orifice 4, duplex pump 5, distributing valve 6, dump ram 7, tipping bucket lock valve 8, boom cylinder 9, swing arm lock valve 10, one way valve 11, pilot valve 12, ball valve 13, pressure selection valve 14; Duplex pump 5 inlet port is connected with hydraulic oil container 1, and duplex pump 5 first oil-out is connected with distributing valve 6P1 hydraulic fluid port, and duplex pump 5 second oil-out is connected with the second oil-in of pressure selection valve 14 through one way valve 11, and the leakage hydraulic fluid port of duplex pump 5 is connected with hydraulic oil container 1; The A1 hydraulic fluid port of distributing valve 6 is connected with the a1 hydraulic fluid port of pilot valve 12, A2 hydraulic fluid port is connected with the a2 hydraulic fluid port of pilot valve 12, B1 hydraulic fluid port is connected with the b1 hydraulic fluid port of pilot valve 12, B2 hydraulic fluid port is connected with the b2 hydraulic fluid port of pilot valve 12, C2 hydraulic fluid port is connected with the 2C hydraulic fluid port of pilot valve 12, D1 hydraulic fluid port is connected with the D3 hydraulic fluid port of tipping bucket lock valve 8, D2 hydraulic fluid port is connected with the rod chamber of dump ram 7, E1 hydraulic fluid port is connected with the E3 hydraulic fluid port of swing arm lock valve 10, E2 hydraulic fluid port is connected with the rod chamber of boom cylinder 9, and T1 hydraulic fluid port is connected with the oil-in of radiator 3; The oil-out of radiator 3 is connected with hydraulic oil container 1 through oil return filter core 2; Throttle orifice 4 is in parallel with radiator 3; The control port of tipping bucket lock valve 8 is connected with the B1 hydraulic fluid port of distributing valve 6, and leak hydraulic fluid port D5 and be connected with hydraulic oil container 1, D4 hydraulic fluid port is connected with the rodless cavity of dump ram 7; The control port of swing arm lock valve 10 is connected with the B2 hydraulic fluid port of distributing valve 6, and leak hydraulic fluid port E5 and be connected with hydraulic oil container 1, E4 hydraulic fluid port is connected with the rodless cavity of boom cylinder 9; The leakage hydraulic fluid port of pressure selection valve 14 is connected with hydraulic oil container 1; The leakage hydraulic fluid port of described pilot valve 12 is connected with hydraulic oil container 1.
On said structure basis, the utility model tipping bucket lock valve 8, swing arm lock valve 10 adopt Hydraulic guide control, and adopt plug-in structure, and the pressure loss is little, simultaneously good sealing effect.Adopt tipping bucket connection pilot pressure oil and swing arm to decline and join the unlatching that pilot pressure oil controls described tipping bucket lock valve 8, swing arm lock valve 10.First oil-in of pressure selection valve 14 is blocked.
This hydraulic system specific works step is as follows:
1) realization of flame-out automatic protection functions: when complete machine is in flameout state; second oil-out of duplex pump 5 exports without pressure oil; even if now ball valve 13 is in closure state; pilot valve 12 does not have pressure signal to export; tipping bucket lock valve 8, swing arm lock valve 10 are in lockup state, complete machine attonity.
2) guide's latch functions realizes: no matter complete machine is in flame-out or starts state, and now disconnect ball valve 13, pilot valve 12 does not have pressure oil to input, so do not have signal to export, tipping bucket lock valve 8, swing arm lock valve 10 are in lockup state, complete machine attonity.
3) self-lock protection in lifting process: in lifting process; the a2 hydraulic fluid port of pilot valve 12 is fuel-displaced; the A2 hydraulic fluid port oil-feed of corresponding distributing valve 6; then the E1 hydraulic fluid port of distributing valve 6 is fuel-displaced; hydraulic oil enters the E3 mouth of swing arm lock valve 10; now swing arm lock valve 10 can be opened automatically, and the E4 mouth of fluid slave arm lock valve 10 flows out, and enters the rodless cavity of boom cylinder 9.When pilot valve 12 no signal exports, swing arm lock valve 10 is in lockup state, and now swing arm cannot fall or sedimentation, even if the explosion of boom cylinder pipeline, swing arm lock valve 10 still can by oil cylinder locking.In decline process, the b2 hydraulic fluid port of pilot valve 12 is fuel-displaced, and the control port oil-feed of swing arm lock valve 10, removes locking by swing arm lock valve 10, and swing arm starts to decline.Tipping bucket connection course of action and pantograph linkage make similar process.
4) self-lock protection in tipping bucket process: in receipts bucket process; the a1 hydraulic fluid port of pilot valve 12 is fuel-displaced; the A1 hydraulic fluid port oil-feed of corresponding distributing valve 6; then the D1 hydraulic fluid port of distributing valve 6 is fuel-displaced; hydraulic oil enters the D3 mouth of tipping bucket lock valve 8; now tipping bucket lock valve 8 can be opened automatically, and fluid flows out from the D4 mouth of tipping bucket lock valve 8, enters the rodless cavity of dump ram 7.When pilot valve 12 no signal exports, tipping bucket lock valve 8 is in lockup state, now scraper bowl cannot discharging or receive bucket, even if the explosion of dump ram pipeline, tipping bucket lock valve 8 still can by oil cylinder locking.In discharge process, the b1 hydraulic fluid port of pilot valve 12 is fuel-displaced, and the control port oil-feed of tipping bucket lock valve 8, tipping bucket lock valve 8 is removed locking, and scraper bowl starts discharging.
Certainly, above-described embodiment is only preferred version of the present utility model, is specifically not limited thereto, and can make pointed adjustment according to actual needs on this basis, thus obtain different embodiments.Because mode in the cards is more, just illustrate no longer one by one here.
Claims (4)
1. one kind has the loader hydraulic system of working of automatic locking function, it is characterized in that, comprise hydraulic oil container (1), oil return filter core (2), radiator (3), throttle orifice (4), duplex pump (5), distributing valve (6), dump ram (7), tipping bucket lock valve (8), boom cylinder (9), swing arm lock valve (10), one way valve (11), pilot valve (12), ball valve (13), pressure selection valve (14);
Described duplex pump (5) inlet port is connected with hydraulic oil container (1), duplex pump (5) first oil-out is connected with distributing valve (6) P1 hydraulic fluid port, duplex pump (5) second oil-out is connected through second oil-in of one way valve (11) with pressure selection valve (14), and the leakage hydraulic fluid port of duplex pump (5) is connected with hydraulic oil container (1), the A1 hydraulic fluid port of described distributing valve (6) is connected with the a1 hydraulic fluid port of pilot valve (12), A2 hydraulic fluid port is connected with the a2 hydraulic fluid port of pilot valve (12), B1 hydraulic fluid port is connected with the b1 hydraulic fluid port of pilot valve (12), B2 hydraulic fluid port is connected with the b2 hydraulic fluid port of pilot valve (12), C2 hydraulic fluid port is connected with the 2C hydraulic fluid port of pilot valve (12), D1 hydraulic fluid port is connected with the D3 hydraulic fluid port of tipping bucket lock valve (8), D2 hydraulic fluid port is connected with the rod chamber of dump ram (7), E1 hydraulic fluid port is connected with the E3 hydraulic fluid port of swing arm lock valve (10), E2 hydraulic fluid port is connected with the rod chamber of boom cylinder (9), T1 hydraulic fluid port is connected with the oil-in of radiator (3), the oil-out of described radiator (3) is connected with hydraulic oil container (1) through oil return filter core (2), described throttle orifice (4) is in parallel with radiator (3), the control port of described tipping bucket lock valve (8) is connected with the B1 hydraulic fluid port of distributing valve (6), and leak hydraulic fluid port D5 and be connected with hydraulic oil container (1), D4 hydraulic fluid port is connected with the rodless cavity of dump ram (7), the control port of described swing arm lock valve (10) is connected with the B2 hydraulic fluid port of distributing valve (6), and leak hydraulic fluid port E5 and be connected with hydraulic oil container (1), E4 hydraulic fluid port is connected with the rodless cavity of boom cylinder (9), the leakage hydraulic fluid port of described pressure selection valve (14) is connected with hydraulic oil container (1), the leakage hydraulic fluid port of described pilot valve (12) is connected with hydraulic oil container (1).
2. the loader hydraulic system of working with automatic locking function according to claim 1, is characterized in that, described tipping bucket lock valve (8), swing arm lock valve (10) adopt Hydraulic guide control, and adopt plug-in structure.
3. the loader hydraulic system of working with automatic locking function according to claim 2, it is characterized in that, adopt tipping bucket connection pilot pressure oil and swing arm to decline and join the unlatching that pilot pressure oil controls described tipping bucket lock valve (8), swing arm lock valve (10).
4. the loader hydraulic system of working with automatic locking function according to claim 1, is characterized in that, the first oil-in of described pressure selection valve (14) is blocked.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520755085.4U CN205134412U (en) | 2015-09-28 | 2015-09-28 | Loader work hydraulic system with automatic locking function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520755085.4U CN205134412U (en) | 2015-09-28 | 2015-09-28 | Loader work hydraulic system with automatic locking function |
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|---|---|
| CN205134412U true CN205134412U (en) | 2016-04-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201520755085.4U Active CN205134412U (en) | 2015-09-28 | 2015-09-28 | Loader work hydraulic system with automatic locking function |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110747936A (en) * | 2019-10-28 | 2020-02-04 | 上海三一重机股份有限公司 | Electromagnetic valve bank, use method thereof and engineering machinery |
| CN112376646A (en) * | 2020-12-18 | 2021-02-19 | 徐工集团工程机械股份有限公司科技分公司 | Loader hydraulic system with safety locking function |
-
2015
- 2015-09-28 CN CN201520755085.4U patent/CN205134412U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110747936A (en) * | 2019-10-28 | 2020-02-04 | 上海三一重机股份有限公司 | Electromagnetic valve bank, use method thereof and engineering machinery |
| CN112376646A (en) * | 2020-12-18 | 2021-02-19 | 徐工集团工程机械股份有限公司科技分公司 | Loader hydraulic system with safety locking function |
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