CN205328551U - Hydraulic circuit fast goes up and down - Google Patents
Hydraulic circuit fast goes up and down Download PDFInfo
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- CN205328551U CN205328551U CN201521013379.6U CN201521013379U CN205328551U CN 205328551 U CN205328551 U CN 205328551U CN 201521013379 U CN201521013379 U CN 201521013379U CN 205328551 U CN205328551 U CN 205328551U
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Abstract
The utility model relates to a hydraulic circuit fast goes up and down. The utility model aims at providing a simple structure, convenient operation's hydraulic circuit fast goes up and down to realize the unloaded quick decline of rising to rise. The utility model provides a: a hydraulic circuit fast goes up and down, the oil tank has, the oil absorption oil filter, the oil pump, a multiple directional control valve and a left side, the hydro -cylinder is played to rise in two on the right side, the oil tank is through the P hydraulic fluid port of oil absorption oil filter and oil pump intercommunication multiple directional control valve, this return circuit still has a differential control valve and a left side, two differential valve pieces on the right side, the A5 hydraulic fluid port intercommunication left side of multiple directional control valve, the P hydraulic fluid port of right side differential valve piece, the A of differential valve piece, the B hydraulic fluid port communicates the homonymy respectively and plays to rise the no pole chamber of hydro -cylinder and have the pole chamber, the X1 hydraulic fluid port of the differential control valve of X1 hydraulic fluid port intercommunication of differential valve piece, the P hydraulic fluid port intercommunication guide hydraulic fluid port of differential control valve, differential control valve X2 hydraulic fluid port communicates the X2 hydraulic fluid port of left and right differential valve piece. The utility model is suitable for a body -building apparatus is fork truck hydraulic system more than 5 tons.
Description
Technical field
This utility model relates to a kind of fast lifting hydraulic circuit。Suitable in more than 5 tons forklift hydraulic systems of body-building apparatus。
Background technology
Along with the competition of fork truck is more and more fierce, the working performance of fork truck is more and more important, it has also become one of people's important evaluation criterion buying fork truck, and decrease speed affects the key factor of working performance。The problem that current more than 5 tons fork truck ubiquity zero load decrease speeds are partially slow, the down maneuver being primarily due to fork truck is dependent on what gravity realized, and under idle condition, the weight of inner upright mounting, fork frame etc. is less than normal, thus results in decrease speed partially slow。
Summary of the invention
The technical problems to be solved in the utility model is: for above-mentioned Problems existing, it is provided that a kind of simple in construction, easy to operate fast lifting hydraulic circuit, to realize unloaded fast lifting decline。
This utility model be the technical scheme is that a kind of fast lifting hydraulic circuit, there are fuel tank, oil-suction oil filter, oil pump, multiple directional control valve and left and right two lift oil tanks, fuel tank connects the P hydraulic fluid port of multiple directional control valve through oil-suction oil filter with oil pump, it is characterized in that: this loop also has a differential-control valve and left and right two different valve blocks
The A5 hydraulic fluid port of described multiple directional control valve connects the P hydraulic fluid port of left and right different valve block, A, B hydraulic fluid port of different valve block is respectively communicated with rodless cavity and the rod chamber of homonymy lift oil tank, the X1 hydraulic fluid port of the X1 hydraulic fluid port connection differential-control valve of different valve block, P hydraulic fluid port connection guide's hydraulic fluid port of described differential-control valve, differential-control valve X2 hydraulic fluid port connects the X2 hydraulic fluid port of left and right different valve block。
Two-bit triplet solenoid directional control valve SV and two-bit triplet pilot sequencing valve SD is included inside described differential-control valve, differential-control valve P hydraulic fluid port connects with No. 1 hydraulic fluid port of two-bit triplet solenoid directional control valve SV, No. 4 hydraulic fluid ports of differential-control valve hydraulic fluid port X1 and two-bit triplet pilot sequencing valve SD connect, No. 3 hydraulic fluid ports of differential-control valve hydraulic fluid port X2 and two-bit triplet pilot sequencing valve SD connect, No. 1 hydraulic fluid port of two-bit triplet pilot sequencing valve SD connects with No. 3 hydraulic fluid ports of two-bit triplet solenoid directional control valve SV, No. 2 hydraulic fluid ports of two-bit triplet solenoid directional control valve SV, No. 2 hydraulic fluid ports of two-bit triplet pilot sequencing valve SD connect with differential-control valve hydraulic fluid port T。
Governor valve and two-bit triplet pilot operated directional control valve PD is included inside described different valve block, different valve block P hydraulic fluid port connects with governor valve hydraulic fluid port F, the B hydraulic fluid port of different valve block connects with No. 4 hydraulic fluid ports of two-bit triplet pilot operated directional control valve PD, No. 1 hydraulic fluid port of the hydraulic fluid port X2 of different valve block and two-bit triplet pilot operated directional control valve PD connects, the X1 hydraulic fluid port of different valve block connects with A hydraulic fluid port, No. 3 hydraulic fluid ports of the hydraulic fluid port T of different valve block and two-bit triplet pilot operated directional control valve PD connect, and the B hydraulic fluid port of governor valve connects with No. 2 hydraulic fluid ports of different valve block A hydraulic fluid port and two-bit triplet pilot operated directional control valve PD。
The beneficial effects of the utility model are: this utility model simple in construction, easy to operate, can make hoist cylinder rod chamber and rodless cavity UNICOM as required when zero load lifts, and form differential circuit, accelerate rising or falling speed。
Accompanying drawing explanation
Fig. 1 is the structural representation of embodiment。
Fig. 2 is the schematic diagram of different valve block in embodiment。
Fig. 3 is the schematic diagram of differential-control valve in embodiment。
Detailed description of the invention
As it is shown in figure 1, the present embodiment is a kind of fast lifting hydraulic circuit, there are fuel tank 1, oil-suction oil filter 2, oil pump 3, multiple directional control valve 4, differential-control valve 5, left and right two different valve blocks 6 and left and right two lift oil tanks 7。Fuel tank 1 connects multiple directional control valve 4 through oil-suction oil filter 2 with oil pump 3, the A5 hydraulic fluid port of multiple directional control valve 4 connects the P hydraulic fluid port of left and right different valve block 6, the rodless cavity of the lift oil tank 7 of different valve block A hydraulic fluid port connection homonymy, the rod chamber of the lift oil tank 7 of different valve block B hydraulic fluid port connection homonymy, the X1 hydraulic fluid port of the X1 hydraulic fluid port connection differential-control valve 5 of different valve block 6, P hydraulic fluid port connection guide's hydraulic fluid port of differential-control valve 5, differential-control valve X2 hydraulic fluid port connects the X2 hydraulic fluid port of left and right different valve block 6, and the T hydraulic fluid port of different valve block 6 and the T hydraulic fluid port of differential-control valve 5 take back fuel tank。
As shown in Figure 2, in this example, different valve block 6 is internal includes governor valve 61 and two-bit triplet pilot operated directional control valve PD, the P hydraulic fluid port of different valve block 6 connects with the F hydraulic fluid port of governor valve 61, the B hydraulic fluid port of different valve block connects with No. 4 hydraulic fluid ports of two-bit triplet pilot operated directional control valve PD, the X2 hydraulic fluid port of different valve block connects with No. 1 hydraulic fluid port of two-bit triplet pilot operated directional control valve PD, the X1 hydraulic fluid port of different valve block connects with A hydraulic fluid port, the T hydraulic fluid port of different valve block connects with No. 3 hydraulic fluid ports of two-bit triplet pilot operated directional control valve PD, the B hydraulic fluid port of governor valve connects with No. 2 hydraulic fluid ports of the A hydraulic fluid port of different valve block 6 and two-bit triplet pilot operated directional control valve PD。
As shown in Figure 3, differential-control valve 5 is internal includes two-bit triplet solenoid directional control valve SV and two-bit triplet pilot sequencing valve SD, the P hydraulic fluid port of differential-control valve 5 connects with No. 1 hydraulic fluid port of two-bit triplet solenoid directional control valve SV, No. 4 hydraulic fluid ports of differential-control valve hydraulic fluid port X1 and two-bit triplet pilot sequencing valve SD connect, No. 3 hydraulic fluid ports of differential-control valve hydraulic fluid port X2 and two-bit triplet pilot sequencing valve SD connect, No. 1 hydraulic fluid port of two-bit triplet pilot sequencing valve SD connects with No. 3 hydraulic fluid ports of two-bit triplet solenoid directional control valve SV, No. 2 hydraulic fluid ports of two-bit triplet solenoid directional control valve SV, No. 2 hydraulic fluid ports of two-bit triplet pilot sequencing valve SD connect with differential-control valve hydraulic fluid port T。
In the present embodiment, two-bit triplet pilot sequencing valve SD is connected to, by pipeline, the pressure signal control that the rodless cavity of lift oil tank 7 obtains, when lift oil tank rodless cavity pressure is more than 80bar, two-bit triplet pilot sequencing valve SD commutates under the effect of pressure oil, is cut to the control pressure signal that different valve block provides。
The present embodiment controls to form differential circuit by the signal of telecommunication and pressure signal and realizes the hydraulic circuit of rapid decrease:
1, zero load hoists
Control crank makes multiple directional control valve 4 commutate, and makes A5 hydraulic fluid port fuel feeding, and fluid enters lift oil tank 7 rodless cavity by the P hydraulic fluid port oil-feed of left and right difference movable valve block 6 from A mouth is fuel-displaced, makes pallet fork increase。Owing to being now that zero load hoists, lift oil tank rodless cavity pressure is less than 80bar, meanwhile control crank makes controller send a signal of telecommunication to make solenoid directional control valve commutate to the two-bit triplet solenoid directional control valve SV of differential-control valve 5, guide oil is entered through the X2 hydraulic fluid port X2 hydraulic fluid port to left and right different valve block 6 by the P hydraulic fluid port of differential-control valve 5, now two-bit triplet pilot operated directional control valve PD commutates under the effect of pressure signal, make hoist cylinder rod chamber and rodless cavity UNICOM, form differential circuit, accelerate lifting velocity。
2, unloaded decline
Control crank makes multiple directional control valve 4 commutate, make the hydraulic oil of lift oil tank 7 rodless cavity, fuel tank 1 is returned to through different valve block, multiple directional control valve 4, now oil cylinder rodless cavity pressure is less than 80bar, control crank makes controller electromagnetic valve can be made to commutate to mono-signal of telecommunication of two-bit triplet solenoid directional control valve SV of differential-control valve 5, two-bit triplet pilot operated directional control valve PD is in initial position, the two-bit triplet pilot operated directional control valve PD of left and right different valve block 6 obtains pressure signal commutation, make hoist cylinder rod chamber and rodless cavity UNICOM, form differential circuit, accelerate decrease speed。
Certainly, described above is not limitation of the utility model, and this utility model is also not limited to the example above; those skilled in the art; in scope of the present utility model, the change made, change interpolation or replace, all should belong to protection domain of the present utility model。
Claims (3)
1. a fast lifting hydraulic circuit, there are fuel tank (1), oil-suction oil filter (2), oil pump (3), multiple directional control valve (4) and left and right two lift oil tanks (7), fuel tank (1) connects the P hydraulic fluid port of multiple directional control valve (4) through oil-suction oil filter (2) and oil pump (3), it is characterized in that: this loop also has a differential-control valve (5) and left and right two different valve blocks (6)
The A5 hydraulic fluid port of described multiple directional control valve (4) connects the P hydraulic fluid port of left and right different valve block (6), A, B hydraulic fluid port of different valve block (6) is respectively communicated with rodless cavity and the rod chamber of homonymy lift oil tank (7), the X1 hydraulic fluid port of X1 hydraulic fluid port connection differential-control valve (5) of different valve block (6), P hydraulic fluid port connection guide's hydraulic fluid port of described differential-control valve (5), differential-control valve (5) X2 hydraulic fluid port connects the X2 hydraulic fluid port of left and right different valve block (6)。
2. fast lifting hydraulic circuit according to claim 1, it is characterized in that: described differential-control valve (5) is internal includes two-bit triplet solenoid directional control valve SV and two-bit triplet pilot sequencing valve SD, differential-control valve (5) P hydraulic fluid port connects with No. 1 hydraulic fluid port of two-bit triplet solenoid directional control valve SV, No. 4 hydraulic fluid ports of differential-control valve hydraulic fluid port X1 and two-bit triplet pilot sequencing valve SD connect, differential-control valve X2 hydraulic fluid port connects with No. 3 hydraulic fluid ports of two-bit triplet pilot sequencing valve SD, No. 1 hydraulic fluid port of two-bit triplet pilot sequencing valve SD connects with No. 3 hydraulic fluid ports of two-bit triplet solenoid directional control valve SV, No. 2 hydraulic fluid ports of two-bit triplet solenoid directional control valve SV, No. 2 hydraulic fluid ports of two-bit triplet pilot sequencing valve SD connect with differential-control valve T hydraulic fluid port。
3. fast lifting hydraulic circuit according to claim 1, it is characterized in that: described different valve block (6) is internal includes governor valve (61) and two-bit triplet pilot operated directional control valve PD, different valve block (6) P hydraulic fluid port connects with governor valve (61) F hydraulic fluid port, the B hydraulic fluid port of different valve block connects with No. 4 hydraulic fluid ports of two-bit triplet pilot operated directional control valve PD, the X2 hydraulic fluid port of different valve block connects with No. 1 hydraulic fluid port of two-bit triplet pilot operated directional control valve PD, the X1 hydraulic fluid port of different valve block connects with A hydraulic fluid port, the T hydraulic fluid port of different valve block connects with No. 3 hydraulic fluid ports of two-bit triplet pilot operated directional control valve PD, the B hydraulic fluid port of governor valve connects with No. 2 hydraulic fluid ports of different valve block (6) A hydraulic fluid port and two-bit triplet pilot operated directional control valve PD。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521013379.6U CN205328551U (en) | 2015-12-09 | 2015-12-09 | Hydraulic circuit fast goes up and down |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521013379.6U CN205328551U (en) | 2015-12-09 | 2015-12-09 | Hydraulic circuit fast goes up and down |
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| Publication Number | Publication Date |
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| CN205328551U true CN205328551U (en) | 2016-06-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201521013379.6U Active CN205328551U (en) | 2015-12-09 | 2015-12-09 | Hydraulic circuit fast goes up and down |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112963397A (en) * | 2021-03-31 | 2021-06-15 | 武汉海博瑞科技有限公司 | Marine hydraulic lifting device for jacking heavy object and control method |
-
2015
- 2015-12-09 CN CN201521013379.6U patent/CN205328551U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112963397A (en) * | 2021-03-31 | 2021-06-15 | 武汉海博瑞科技有限公司 | Marine hydraulic lifting device for jacking heavy object and control method |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |