CN209370187U - A kind of pilot operated directional control valve - Google Patents
A kind of pilot operated directional control valve Download PDFInfo
- Publication number
- CN209370187U CN209370187U CN201822120375.8U CN201822120375U CN209370187U CN 209370187 U CN209370187 U CN 209370187U CN 201822120375 U CN201822120375 U CN 201822120375U CN 209370187 U CN209370187 U CN 209370187U
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- Prior art keywords
- valve body
- spool
- pilot operated
- valve
- operated directional
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Abstract
The utility model discloses a kind of pilot operated directional control valves, are mainly made of valve body (1) and spool (2)；The left and right end face of valve body (1) is equipped with the control port of connection, spool (2) is arranged in the control oil circuit oilhole of valve body (1), valve body vertical direction is equipped with the working oil path orthogonal with control oil circuit oilhole, upper and lower hydraulic fluid port is respectively actuator port Q1 and Q2, spool (2) is equipped with a ring annular groove, when the oilhole of the working oil path on the annular groove and valve body is to working oil path connection after just.Spool, which may be implemented, in the utility model can control high sensitivity, while reducing cost, reducing failure rate together with the function of hydraulic fluid ports different on valve body in different location.
Description
Technical field
The utility model belongs to field of hydraulic control, and in particular to a kind of pilot operated directional control valve.
Background technique
Pilot operated directional control valve in current hydraulic control system mostly uses spool both ends or one end by spring to limit valve
The normal orientation of core, this conventional structure is in certain specific hydraulic control systems, for example, the hydraulic cab in heavy truck lifts system
The phenomenon that in system, the movement resistance for frequently resulting in spool is big, controls sensitivity decrease, if improving sensitivity, also needs additionally to increase
Liquid feeding presses amplification system, and the manufacturing cost of hydraulic system is caused to increase, and failure rate increases.
Utility model content
The utility model provides a kind of pilot operated directional control valve, and the pilot operated directional control valve control solved in hydraulic control system is sensitive
Low problem is spent, while realizing the purpose for reducing cost, reducing failure rate.
In order to solve the above technical problems, the utility model provides a kind of pilot operated directional control valve, it is characterised in that: mainly by
Valve body 1 and spool 2 form；The left and right end face of valve body 1 is equipped with the control port of connection, and the control oil circuit of valve body 1 is arranged in spool 2
In oilhole, valve body vertical direction is equipped with the working oil path orthogonal with control oil circuit oilhole, and upper and lower hydraulic fluid port is respectively actuator port Q1
And Q2, spool 2 are equipped with a ring annular groove, when the annular groove and the working oil path on valve body oilhole to just after working oil path connect
It is logical.
The utility model has the advantages that the utility model spool may be implemented can be together with the function of hydraulic fluid ports different on valve body in different location
Can, high sensitivity is controlled, while reducing cost, reducing failure rate.
Detailed description of the invention
Fig. 1 is the structure principle chart of the pilot operated directional control valve of the utility model.
Fig. 2 is the application principle figure of the pilot operated directional control valve of the utility model.
Specific embodiment
To keep the purpose of this utility model, content and advantage clearer, below to the specific embodiment party of the utility model
Formula is described in further detail.
The utility model proposes a kind of pilot operated directional control valve, be mainly made of valve body 1, spool 2 and valve deck 3；A left side for valve body 1
Control port P2 is provided on end face, valve deck is fixed in the hole of the right side of valve body 1, and control port P1, spool 2 are provided on valve deck
It is arranged in the control oil circuit oilhole of valve body 1, valve body vertical direction is equipped with the working oil path orthogonal with control oil circuit oilhole, up and down
Hydraulic fluid port is respectively actuator port Q1 and Q2, and spool 2 is equipped with a ring annular groove, when the working oil path on the annular groove and valve body
Oilhole connects just rear working oil path.
Referring to Fig. 1, when P2 mouthfuls of oil pressure of pilot operated directional control valve are greater than P1 mouthfuls of oil pressure, the ring shaped oil passage and liquid controlled reversing of spool 2
Valve actuator port Q1 and Q2 are staggered, and Q1 and Q2 mouthfuls are in off state.When P1 mouthfuls of oil pressure of pilot operated directional control valve are greater than P2 mouthfuls of oil pressure,
The ring shaped oil passage of spool 2 and pilot operated directional control valve actuator port Q1 and Q2 centering, Q1 and Q2 mouthful are in connected state.
Referring to fig. 2, be the utility model pilot operated directional control valve in two-position two-way hydraulic control structure of reversing valve schematic diagram, figure
In, when hand-operated direction valve 7 is in III, working fluid flows to B oil circuit through check valve 5 from A oil circuit, since check valve 4 inputs
With output end there are pressure difference, cause 2 both ends of spool in pilot operated directional control valve there are pressure difference, spool right atrial pressure is greater than left side
Pressure, so that pilot operated directional control valve is in I, pressure oil is input in equipment 6, realizes the major function of equipment 5.When
When hand-operated direction valve 7 is in IV, if working fluid flows to C oil circuit through pilot operated directional control valve 4 from B oil circuit, check valve 5, which is in, to be cut
The spool left pressure of only state, pilot operated directional control valve 4 is greater than right atrial pressure, so that pilot operated directional control valve is in II, so that work
Oil liquid in device 6 can be returned in equipment 6 by oil circuit B, pilot operated directional control valve 4, oil circuit C, realize the auxiliary of equipment 6
Assist energy.
Claims (2)
1. a kind of pilot operated directional control valve, it is characterised in that: be mainly made of valve body (1) and spool (2)；The left and right end face of valve body (1)
Control port equipped with connection, spool (2) are arranged in the control oil circuit oilhole of valve body (1), and valve body vertical direction is equipped with and control
The orthogonal working oil path in liquefaction road binders hole, upper and lower hydraulic fluid port are respectively actuator port, and spool (2) is equipped with a ring annular groove, when this
Actuator port on annular groove and valve body connects just rear working oil path.
2. a kind of pilot operated directional control valve according to claim 1, it is characterised in that: valve deck is fixed on the right side of valve body (1)
Hole in, control port is provided on valve deck.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822120375.8U CN209370187U (en) | 2018-12-18 | 2018-12-18 | A kind of pilot operated directional control valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822120375.8U CN209370187U (en) | 2018-12-18 | 2018-12-18 | A kind of pilot operated directional control valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209370187U true CN209370187U (en) | 2019-09-10 |
Family
ID=67833022
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822120375.8U Active CN209370187U (en) | 2018-12-18 | 2018-12-18 | A kind of pilot operated directional control valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209370187U (en) |
-
2018
- 2018-12-18 CN CN201822120375.8U patent/CN209370187U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |