CN204805187U - Flexible arm confluence control hydraulic system of flexible arm forklift truck - Google Patents
Flexible arm confluence control hydraulic system of flexible arm forklift truck Download PDFInfo
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- CN204805187U CN204805187U CN201520333525.7U CN201520333525U CN204805187U CN 204805187 U CN204805187 U CN 204805187U CN 201520333525 U CN201520333525 U CN 201520333525U CN 204805187 U CN204805187 U CN 204805187U
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Abstract
The utility model discloses a flexible arm confluence control hydraulic system of flexible arm forklift truck, including hydraulic tank (1), main pump (2), confluence pump (3), main valve (4), guide's oil sources piece (5), flexible guide's handle (6), solenoid switching valve (7), two six lead to switching -over valves (8), balanced valve (9), balanced valve two (10), flexible hydro -cylinder (11) and two -stage flexible hydro -cylinder (12), the oil -out of main valve intercommunication main pump and the oil -out of confluence pump, guide's oil sources piece communicates main pump and flexible guide's handle, the I hydraulic fluid port and the II hydraulic fluid port intercommunication main valve of flexible guide's handle, solenoid switching valve establishes ties and connects between flexible guide's handle II hydraulic fluid port and main valve, the flexible hydro -cylinder of flexible hydro -cylinder and two -stage is connected to two six through balanced valve no. 1 and balanced valve no. 2 respectively and leads to the switching -over valve. The utility model discloses a when stretching out, the flexible hydro -cylinder one -level of double pump confluence technology two -stage collaborates for the one -level speed of stretching out realizes the trim control that flexible arm stretches out.
Description
Technical field
The utility model relates to a kind of telescopic arm forklift truck hydraulic system, and specifically a kind of telescopic arm forklift truck telescopic boom interflow hydraulic control system, belongs to telescopic arm forklift truck hydraulic system technical field.
Background technique
At present, the telescopic arm forklift truck that lift height reaches 17 meters mostly adopts the expansion device of multistage telescopic arm, and when adopting multiple oil cylinder pushing telescopic boom action, each oil cylinder speed there are differences, steady not when swing arm stretches out.Particularly adopt the cavity volume of one-level during two-stage telescopic oil cylinder to be greater than the cavity volume of secondary, same oil pump feed hourly velocity difference is too large, and it is comparatively slow that one-level stretches out hourly velocity, has a strong impact on working efficiency.
Summary of the invention
For above-mentioned prior art Problems existing, the utility model provides a kind of telescopic arm forklift truck telescopic boom to collaborate hydraulic control system, can reduce the difference of stretching out speed between multi-stage expansion oil cylinder, and it is steady that raising multistage telescopic arm stretches out, and increases work efficiency.
To achieve these goals, a kind of telescopic arm forklift truck telescopic boom interflow hydraulic control system that the utility model adopts, comprise hydraulic oil container, main pump, interflow pump, main valve, pilot control block, flexible pilot handle, electromagnetic switching valve, two six-way transfer valves, equilibrium valve one, equilibrium valve two, telescopic oil cylinder and two-stage telescopic oil cylinders, the P2 hydraulic fluid port of main valve is communicated with the oil outlet of main pump, the P1 hydraulic fluid port of main valve is communicated with the oil outlet of interflow pump, and P mouth and the A mouth of pilot control block are communicated with the oil outlet of main pump and the P mouth of flexible pilot handle respectively; I hydraulic fluid port and the II hydraulic fluid port of flexible pilot handle are communicated with b1, b2 hydraulic fluid port and a1, a2 hydraulic fluid port of main valve respectively, and electromagnetic switching valve series connection is between flexible pilot handle II hydraulic fluid port and the a1 hydraulic fluid port of main valve; Telescopic oil cylinder and two-stage telescopic oil cylinder are connected to two six-way transfer valves respectively by equilibrium valve one and equilibrium valve two; A, B hydraulic fluid port correspondence of two six-way transfer valves is communicated with A2, B2 hydraulic fluid port of main valve, and the flexible interflow connection A1 hydraulic fluid port of main valve is connected in parallel to flexible connection B2 hydraulic fluid port.
Described flexible pilot handle I hydraulic fluid port controls extend action, and II hydraulic fluid port controls retract action; When two six-way transfer valves obtain electric, telescopic oil cylinder action, during two six-way transfer valve dead electricity, the action of two-stage telescopic oil cylinder.
Adopt double-pump confluence system, the flexible interflow connection that interflow pump is main valve provides interflow flow, does not need to collaborate pump release during interflow.
When two-stage telescopic oil cylinder one-level that and if only if is stretched out, realize interflow.
Selectively cut off interflow guide oil by the power on/off of electromagnetic switching valve to realize whether collaborating, in two kinds of situations, interflow guide oil can be cut off:
A. there is interlocked relationship in electromagnetic switching valve and two six-way transfer valves, when two six-way transfer valves obtain electric right position work, and telescopic oil cylinder action, electromagnetic shut-off valve obtains electric, cuts off interflow guide oil;
B. collaborate when two-stage telescopic oil cylinder one-level is stretched out, do not collaborate when secondary stretches out, when two-stage telescopic oil cylinder one-level reaches terminal, between swing arm, position limit switch triggering solenoid directional control valve obtains electric, cuts off interflow flow.
Compared with prior art, the utility model adopts Dual-pump flow-converging technology to realize collaborating when two-stage telescopic oil cylinder one-level is stretched out, and namely accelerates by Dual-pump flow-converging the speed that one-level stretches out, reduces the difference that two inter-stages stretch out speed, improve the steady control that telescopic boom stretches out, and improve working efficiency.Meanwhile, only collaborate oil pump feed when two-stage telescopic oil cylinder one-level is stretched out, collaborate the state that pump is in release under other state, reasonable energy utilization, do not cause the waste of energy.In addition, the power on/off by controlling electromagnetic switching valve optionally cuts off interflow guide oil.
Accompanying drawing explanation
Fig. 1 is schematic diagram of the present utility model;
Fig. 2 is operation logic of the present utility model and automatically controlled graph of a relation.
In figure: 1, hydraulic oil container, 2, main pump, 3, interflow pump, 4, main valve, 5, pilot control block, 6, flexible pilot handle, 7, electromagnetic switching valve, 8, two six-way transfer valves, 9, equilibrium valve one, 10, equilibrium valve two, 11, telescopic oil cylinder, 12, two-stage telescopic oil cylinder, 13, switching push button.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail.
As shown in Figure 1, a kind of telescopic arm forklift truck telescopic boom interflow hydraulic control system, comprise hydraulic oil container 1, main pump 2, interflow pump 3, main valve 4, pilot control block 5, flexible pilot handle 6, electromagnetic switching valve 7, two six-way transfer valves 8, equilibrium valve 1, equilibrium valve 2 10, telescopic oil cylinder 11 and two-stage telescopic oil cylinders 12, the P2 hydraulic fluid port of main valve 4 is communicated with the oil outlet of main pump 2, the P1 hydraulic fluid port of main valve 4 is communicated with the oil outlet of interflow pump 3, and P mouth and the A mouth of pilot control block 5 are communicated with the oil outlet of main pump 2 and the P mouth of flexible pilot handle 6 respectively; I hydraulic fluid port and the II hydraulic fluid port of flexible pilot handle 6 are communicated with b1, b2 hydraulic fluid port and a1, a2 hydraulic fluid port of main valve 4 respectively, and electromagnetic switching valve 7 series connection is between flexible pilot handle 6II hydraulic fluid port and the a1 hydraulic fluid port of main valve 4; Telescopic oil cylinder 11 and two-stage telescopic oil cylinder 12 are connected to two six-way transfer valves 8 respectively by equilibrium valve 1 and equilibrium valve 2 10; A, B hydraulic fluid port correspondence of two six-way transfer valves 8 is communicated with A2, B2 hydraulic fluid port of main valve 4, and the flexible interflow connection A1 hydraulic fluid port of main valve 4 is connected in parallel to flexible connection B2 hydraulic fluid port.
The I hydraulic fluid port of described flexible pilot handle 6 controls extend action, and II hydraulic fluid port controls retract action; When two six-way transfer valves 8 obtain electric, telescopic oil cylinder 11 action, during two six-way transfer valve 8 dead electricity, two-stage telescopic oil cylinder 12 action.During electromagnetic switching valve 7 dead electricity, the II hydraulic fluid port of flexible pilot handle 6 is communicated with interflow guide's hydraulic fluid port a1, if II hydraulic fluid port connected by operated pilot handle 6, can realize interflow.Electromagnetic switching valve 7 electricly must can cut off interflow guide oil, cannot collaborate.Two six-way transfer valves 8 realize its power on/off by push-botton operation, and electromagnetic switching valve 7 is by position limit switch and its power on/off of automatically controlled logic control.
Adopt double-pump confluence system, the flexible interflow connection that interflow pump 3 is main valve 4 provides interflow flow, does not need to collaborate pump 3 release during interflow.
When two-stage telescopic oil cylinder 12 one-level that and if only if is stretched out, realize interflow.
Whether the power on/off by electromagnetic switching valve 7 is selectively cut off interflow guide oil and is realized collaborating, as follows to the control of electromagnetic switching valve 7 power on/off: electromagnetic switching valve 7 normality position is power failure state.When two-stage telescopic oil cylinder 12 one-level reaches terminal, between swing arm, position limit switch triggering electromagnetic switching valve 7 obtains electric, cuts off interflow guide oil.When two six-way transfer valves 8 obtain electric, telescopic oil cylinder 11 action, now triggers electromagnetic switching valve 7 and obtains electric, cut off interflow guide oil.When two-stage telescopic oil cylinder 12 one-level overhang leaves and stretches out terminal under two six-way transfer valve 8 power failure states, electromagnetic switching valve 7 dead electricity can be triggered.Two-stage telescopic oil cylinder 12 one-level is stretched out and under terminal state, during two six-way transfer valve 8 dead electricity, can not triggered electromagnetic switching valve 7 dead electricity.Visible, interflow guide oil can be cut off in the following two cases:
A. there is interlocked relationship in electromagnetic switching valve 7 and two six-way transfer valves 8, when two six-way transfer valves 8 obtain electric right position work, and telescopic oil cylinder 11 action, electromagnetic shut-off valve 7 obtains electric, cuts off interflow guide oil;
B. collaborate when two-stage telescopic oil cylinder 12 one-level is stretched out, do not collaborate when secondary stretches out, when two-stage telescopic oil cylinder 12 one-level reaches terminal, between swing arm, position limit switch triggering solenoid directional control valve 7 obtains electric, cuts off interflow flow.
As shown in Figure 1, main valve 4 flexible interflow connection gets oil from interflow pump 3, and main valve 4 flexible interflow connection A1 hydraulic fluid port is connected in parallel to flexible connection B2 hydraulic fluid port.Main valve 4 stretch connection get oil from main pump 2, fuel feeding to two six-way transfer valve 8, makes telescopic oil cylinder 11 or two-stage telescopic oil cylinder 12 action.Two left positions of six-way transfer valve 8 normality dead electricity work, and operate two-stage telescopic oil cylinder 12 action when stretching pilot handle 6, and two six-way transfer valves 8 obtain electric right position work, operate telescopic oil cylinder 11 action when stretching pilot handle 6.The P mouth of pilot control block 5 gets oil from main pump 2, and the A mouth of pilot control block 5 is communicated with the P mouth of flexible pilot handle 6.During flexible pilot handle 6 to II position, oil cylinder stretches out, and retracts to oil cylinder during I position.Wherein electromagnetic switching valve 7 normality position dead electricity, when two-stage telescopic oil cylinder 12 one-level reaches terminal or two six-way transfer valves 8 obtain electric, electromagnetic switching valve 7 obtains electric, cuts off interflow guide oil.Only when two-stage telescopic oil cylinder 12 one-level does not reach terminal and two six-way transfer valve 8 dead electricity time electromagnetic switching valve 7 be in power failure state, connect interflow guide oil.
Whole telescopic process is as shown in Figure 2: when first starting expanding-contracting action, driver determines telescopic oil cylinder 11 action or two-stage telescopic oil cylinder 12 action as required.If telescopic oil cylinder 11 action, press switching push button 13 make two six-way transfer valves 8 electric, now obtain electric with the electromagnetic switching valve 7 of its interlocking, interflow guide oil is cut off, pull flexible pilot handle 6 to II position, telescopic oil cylinder 11 stretches out, and pull flexible pilot handle 6 to I position, telescopic oil cylinder 11 is retracted, if two-stage telescopic oil cylinder 12 action, operation switching push button 13 makes two six-way transfer valve 8 dead electricity, pull flexible pilot handle 6 to I position, two-stage telescopic oil cylinder 12 is retracted from inside to outside step by step, pull flexible pilot handle 6 to II position two-stage telescopic oil cylinder 12 to stretch out step by step from outside to inside, when two-stage telescopic oil cylinder 12 one-level is stretched out, electromagnetic switching valve 7 keeps power failure state, interflow guide oil is connected, two-stage telescopic oil cylinder 12 one-level is stretched out fast, when two-stage telescopic oil cylinder 12 one-level is stretched out to the end, electromagnetic switching valve 7 obtains electric, interflow guide oil is cut off, two-stage telescopic oil cylinder secondary continues to stretch out.Just steadily stretching out of multistage telescopic arm can be realized with work pump delivery like this by Proper Match interflow pump
From said structure, the utility model adopts Dual-pump flow-converging technology to realize collaborating when two-stage telescopic oil cylinder one-level is stretched out, and namely accelerates by Dual-pump flow-converging the speed that one-level stretches out, reduces the difference that two inter-stages stretch out speed, improve the steady control that telescopic boom stretches out, and improve working efficiency.Meanwhile, only collaborate oil pump feed when two-stage telescopic oil cylinder one-level is stretched out, collaborate the state that pump is in release under other state, reasonable energy utilization, do not cause the waste of energy.In addition, the power on/off by controlling electromagnetic switching valve optionally cuts off interflow guide oil.
Claims (5)
1. a telescopic arm forklift truck telescopic boom interflow hydraulic control system, it is characterized in that, comprise hydraulic oil container (1), main pump (2), interflow pump (3), main valve (4), pilot control block (5), flexible pilot handle (6), electromagnetic switching valve (7), two six-way transfer valves (8), equilibrium valve one (9), equilibrium valve two (10), telescopic oil cylinder (11) and two-stage telescopic oil cylinder (12), the P2 hydraulic fluid port of main valve (4) is communicated with the oil outlet of main pump (2), the P1 hydraulic fluid port of main valve (4) is communicated with the oil outlet at interflow pump (3), P mouth and the A mouth of pilot control block (5) are communicated with the oil outlet of main pump (2) and the P mouth of flexible pilot handle (6) respectively, I hydraulic fluid port and the II hydraulic fluid port of flexible pilot handle (6) are communicated with b1, b2 hydraulic fluid port and a1, a2 hydraulic fluid port of main valve (4) respectively, and electromagnetic switching valve (7) series connection is between flexible pilot handle (6) II hydraulic fluid port and the a1 hydraulic fluid port of main valve (4), telescopic oil cylinder (11) and two-stage telescopic oil cylinder (12) are connected to two six-way transfer valves (8) respectively by equilibrium valve one (9) and equilibrium valve two (10), A, B hydraulic fluid port correspondence of two six-way transfer valves (8) is communicated with A2, B2 hydraulic fluid port of main valve (4), and the flexible interflow connection A1 hydraulic fluid port of main valve (4) is connected in parallel to flexible connection B2 hydraulic fluid port.
2. a kind of telescopic arm forklift truck telescopic boom interflow according to claim 1 hydraulic control system, it is characterized in that, described flexible pilot handle (6) I hydraulic fluid port controls extend action, and II hydraulic fluid port controls retract action; When two six-way transfer valves (8) obtain electric, telescopic oil cylinder (11) action, during two six-way transfer valve (8) dead electricity, two-stage telescopic oil cylinder (12) action.
3. a kind of telescopic arm forklift truck telescopic boom interflow according to claim 1 hydraulic control system, it is characterized in that, adopt double-pump confluence system, the flexible interflow connection that interflow pump (3) is main valve (4) provides interflow flow, does not need to collaborate pump (3) release during interflow.
4. a kind of telescopic arm forklift truck telescopic boom interflow according to claim 1 hydraulic control system, is characterized in that, when two-stage telescopic oil cylinder (12) one-level that and if only if is stretched out, realize interflow.
5. a kind of telescopic arm forklift truck telescopic boom interflow according to claim 1 hydraulic control system, it is characterized in that, selectively cut off interflow guide oil by the power on/off of electromagnetic switching valve (7) to realize whether collaborating, in two kinds of situations, interflow guide oil can be cut off:
A. there is interlocked relationship in electromagnetic switching valve (7) and two six-way transfer valves (8), when two six-way transfer valves (8) obtain electric right position work, telescopic oil cylinder (11) action, electromagnetic shut-off valve (7) obtains electric, cuts off interflow guide oil;
B. collaborate when two-stage telescopic oil cylinder (12) one-level is stretched out, do not collaborate when secondary stretches out, when two-stage telescopic oil cylinder (12) one-level reaches terminal, between swing arm, position limit switch triggering solenoid directional control valve (7) obtains electric, cuts off interflow flow.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520333525.7U CN204805187U (en) | 2015-05-21 | 2015-05-21 | Flexible arm confluence control hydraulic system of flexible arm forklift truck |
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| CN201520333525.7U CN204805187U (en) | 2015-05-21 | 2015-05-21 | Flexible arm confluence control hydraulic system of flexible arm forklift truck |
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| CN204805187U true CN204805187U (en) | 2015-11-25 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105422539A (en) * | 2016-01-18 | 2016-03-23 | 浙江高宇液压机电有限公司 | Two-circuit multi-way directional valve and in-parallel installation method of two-circuit multi-way directional valve with oil cylinders |
-
2015
- 2015-05-21 CN CN201520333525.7U patent/CN204805187U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105422539A (en) * | 2016-01-18 | 2016-03-23 | 浙江高宇液压机电有限公司 | Two-circuit multi-way directional valve and in-parallel installation method of two-circuit multi-way directional valve with oil cylinders |
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