CN205446230U - Flow switches dash -control multiple unit valve - Google Patents
Flow switches dash -control multiple unit valve Download PDFInfo
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- CN205446230U CN205446230U CN201521105845.3U CN201521105845U CN205446230U CN 205446230 U CN205446230 U CN 205446230U CN 201521105845 U CN201521105845 U CN 201521105845U CN 205446230 U CN205446230 U CN 205446230U
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- hydraulic fluid
- fluid port
- dash
- multiple unit
- unit valve
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Abstract
The utility model discloses a flow switches dash -control multiple unit valve is equipped with P1 hydraulic fluid port, P2 hydraulic fluid port, LS1 hydraulic fluid port and LS2 hydraulic fluid port on the multiple unit valve, can be connected with two variable pumps, realizes the confluence of double pump, its characterized in that, the length of P1 hydraulic fluid port and P2 hydraulic fluid port work displacement on the multiple unit valve is 7.8mm, and LS1 hydraulic fluid port and LS2 hydraulic fluid port work shift length are 5.3mm. The utility model discloses the realization owner collaborates proportioner three typical operating position altogether, realizes the corresponding time delay of realization of mainstream volume handover request and mainstream volume switching control circuit oil circuit to it switches the system's impact that arouses to reduce the reason way, obviously reduced the impact property, the commonality is strong.
Description
Technical field
This utility model relates to a kind of dash-control banked direction control valves of flow switch, belongs to banked direction control valves technical field.
Background technology
It is known that flow switch refers to change according to traffic demand, change fuel delivery size and carry out simultaneously, run the efficiency of each action improving main frame, it is achieved the automatic distribution of flow, is the trend of current hydraulic system development.
Traditional engineering machinery flow switch, according to actual operation requirements, typically has following characteristics, can quickly start, can quickly stop again；Start/stop impact is little, steady；Realize synchronizing accurate revolution etc., make engineering machinery can safety quick, work easily.But, current product is also not suitable for variable pump control system；Existing structure can not effectively reduce, the system shock that flow switch causes, and does not has corresponding structure to be available for using for reference.
In Chinese invention patent disclosed in 8 days February in 2012 " a kind of converging valve and be provided with the crane hydraulic control system of this converging valve ", it includes the first shuttle valve；Electromagnetic valve, has the first hydraulic fluid port and the second hydraulic fluid port, and its first hydraulic fluid port connects the oil-out of described first shuttle valve；First pilot operated directional control valve, has the first hydraulic fluid port and the second hydraulic fluid port, and its control port connects the second hydraulic fluid port of described electromagnetic valve；Pilot operated valve device, has the first hydraulic fluid port and the second hydraulic fluid port, and its control port connects the second hydraulic fluid port of described electromagnetic valve, and there are two duties: in the first duty, its first hydraulic fluid port and the second hydraulic fluid port disconnect, in the second duty, and its first hydraulic fluid port and the connection of the second hydraulic fluid port.This converging valve can ensure that the telescopic oil cylinder of crane and amplitude oil cylinder had not only had higher stretching out efficiency but also have relatively low retraction energy consumption, but in actual use, it exists following not enough:
1, this converging valve realizes interflow function by pilot operated directional control valve.Not having pooling feature, during this structure interflow, system can produce strong oscillation phenomenon；
2, this converging valve is only applicable to Constant Pump System, it is impossible to be applicable to variable pump systems, the most energy-conservation, and range of application exists limitation.
Summary of the invention
The problem existed for above-mentioned prior art, this utility model provides a kind of dash-control banked direction control valves of flow switch, and its flow switch is steady, highly versatile.
To achieve these goals, the dash-control banked direction control valves of a kind of flow switch that this utility model uses, banked direction control valves is provided with P1 hydraulic fluid port, P2 hydraulic fluid port, LS1 hydraulic fluid port and LS2 hydraulic fluid port, can be connected with two variable pumps, realize the interflow of double pump, it is characterized in that, P1 hydraulic fluid port and a length of 7.8mm, the LS1 hydraulic fluid port of P2 hydraulic fluid port work shift and a length of 5.3mm of LS2 hydraulic fluid port work shift on banked direction control valves.
Banked direction control valves has three exemplary operation positions, and time upper, P1 Yu P2 ends, LS1 Yu LS2 ends；During middle position, P1 with P2 connects, LS1 Yu LS2 ends；Time the next, P1 with P2 connects, LS1 with LS2 connects.
Compared with prior art, this utility model is by changing converging valve Oil sealing length, realize main interflow proportioning device totally three exemplary operation positions, it is achieved main flow switches the corresponding time delay of realization of oil circuit and main flow switching control oil circuit oil circuit, thus reduces reason road and switch the system shock caused；By using the converging valve switching control structure of this patent, P1 Yu P2 hydraulic fluid port, LS1 Yu LS2 hydraulic fluid port are respectively corresponding length, hence it is evident that reduce impact property.Its compact conformation, low cost, install easy to operate, highly versatile.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model；
Fig. 2 is control principle drawing of the present utility model.
In figure: 1, variable pump I, 2, variable pump II, 3, banked direction control valves.
Detailed description of the invention
The utility model is described in further detail below in conjunction with the accompanying drawings.
As shown in Figure 1, a kind of dash-control banked direction control valves of flow switch, banked direction control valves is provided with P1 hydraulic fluid port, P2 hydraulic fluid port, LS1 hydraulic fluid port and LS2 hydraulic fluid port, can be connected with two variable pumps, realize the interflow of double pump, it is characterized in that, P1 hydraulic fluid port and a length of 7.8mm, the LS1 hydraulic fluid port of P2 hydraulic fluid port work shift and a length of 5.3mm of LS2 hydraulic fluid port work shift on banked direction control valves.
Banked direction control valves has three exemplary operation positions, and time upper, P1 Yu P2 ends, LS1 Yu LS2 ends；During middle position, P1 with P2 connects, LS1 Yu LS2 ends；Time the next, P1 with P2 connects, LS1 with LS2 connects.
During as in figure 2 it is shown, use, this banked direction control valves and two variable pumps can be connected, will be connected respectively with P1 hydraulic fluid port, P2 hydraulic fluid port, LS1 hydraulic fluid port and the LS2 hydraulic fluid port of banked direction control valves 3 by variable pump I1 and variable pump II2.Both sides UNICOM the most simultaneously is controlled by interflow valve rod.Corresponding time delay can be realized by difference switching time, thus reduce the impact caused because of the variable pump displacement variation that is connected.Under the conditions of only changing LS restriction Oil sealing length, increase cost hardly, flow switch can be realized dash-control.Two temporal time delays of hydraulic fluid port, are realized by the Oil sealing length of main valve stem.Can be widely used in the occasion of variable power source, reduce the system shock caused because of power source displacement variation, flow switch is more steady.
From said structure, this utility model is only changing LS restriction, under the conditions of Oil sealing length, and two temporal time delays of hydraulic fluid port, increase cost hardly, flow switch can be realized dash-control.Thus reducing the impact caused because of the variable pump displacement variation that is connected, flow switch is steady；Simultaneously, it is achieved that three exemplary operation positions, highly versatile.
Claims (2)
1. the dash-control banked direction control valves of flow switch, banked direction control valves is provided with P1 hydraulic fluid port, P2 hydraulic fluid port, LS1 hydraulic fluid port and LS2 hydraulic fluid port, can be connected with two variable pumps, realize the interflow of double pump, it is characterized in that, P1 hydraulic fluid port and a length of 7.8mm, the LS1 hydraulic fluid port of P2 hydraulic fluid port work shift and a length of 5.3mm of LS2 hydraulic fluid port work shift on banked direction control valves.
A kind of dash-control banked direction control valves of flow switch the most according to claim 1, it is characterised in that banked direction control valves has three exemplary operation positions, time upper, P1 Yu P2 ends, LS1 Yu LS2 ends；During middle position, P1 with P2 connects, LS1 Yu LS2 ends；Time the next, P1 with P2 connects, LS1 with LS2 connects.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521105845.3U CN205446230U (en) | 2015-12-25 | 2015-12-25 | Flow switches dash -control multiple unit valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521105845.3U CN205446230U (en) | 2015-12-25 | 2015-12-25 | Flow switches dash -control multiple unit valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205446230U true CN205446230U (en) | 2016-08-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201521105845.3U Active CN205446230U (en) | 2015-12-25 | 2015-12-25 | Flow switches dash -control multiple unit valve |
Country Status (1)
| Country | Link |
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| CN (1) | CN205446230U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108516465A (en) * | 2018-06-01 | 2018-09-11 | 浙江三装备有限公司 | hydraulic system and crane |
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2015
- 2015-12-25 CN CN201521105845.3U patent/CN205446230U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108516465A (en) * | 2018-06-01 | 2018-09-11 | 浙江三装备有限公司 | hydraulic system and crane |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |