CN203614493U - Pilot oil source valve - Google Patents
Pilot oil source valve Download PDFInfo
- Publication number
- CN203614493U CN203614493U CN201320729596.XU CN201320729596U CN203614493U CN 203614493 U CN203614493 U CN 203614493U CN 201320729596 U CN201320729596 U CN 201320729596U CN 203614493 U CN203614493 U CN 203614493U
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- Prior art keywords
- spool
- chamber
- oil
- cavity
- valve
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Abstract
The utility model provides a pilot oil source valve, and solves the problems that an existing pilot oil source valve is easy to damage and is high in fault rate and the like. The pilot oil source valve provided by the utility model comprises a valve body and a valve plug; the valve body is internally provided with a cylindrical valve plug cavity; the inner wall of the valve plug cavity is sequentially provided with a reflowing oil cavity, an oil inlet cavity and a working oil cavity from top to bottom; the valve body is provided with an oil inlet, an oil return opening and a working oil port; the oil inlet is communicated with the oil inlet cavity, the oil return opening is communicated with the reflowing oil cavity, and the working oil port is communicated with the working oil cavity; the valve plug is a cylindrical valve plug and comprises a pressing part, an upper sealing part, a communication part and a lower sealing part from top to bottom, and the outer walls of the upper sealing part and the lower sealing part are both jointed with the inner wall of the valve plug cavity; a cavity is formed between the outer wall of the communication part and the inner wall of the valve plug cavity, is communicated with the oil inlet cavity, and is alternately communicated with the reflowing oil cavity and the working oil cavity by virtue of the lifting of the valve plug; the pressing part extends from the opening of the valve plug cavity in the top of the valve body; a spring is arranged between the bottom of the valve plug and the bottom of the valve plug cavity.
Description
Technical field
The utility model relates to a kind of guide oil source valve of oil sources valve, particularly a kind of mechanical direct-acting type.
Background technique
Guide oil source valve is mainly used in controlling pilot system oil circuit in hydraulic system; pilot system oil circuit working pressure is provided; protect whole pilot system oil circuit safety; it is the important component part of pilot system; pilot system is widely used in the engineering machinery such as excavator, fork installation; current guide oil source valve is electromagnetic type guide oil source valve substantially, by position limit switch is installed, controls turning on and off of solenoid valve.When use, in the time that operating handle presses down, the contact mechanisms such as band moving cam withstand position limit switch solenoid valve are connected, battery valve energising, and coil produces magnetic, holds oil sources valve core and opens oil circuit.
As everyone knows, the working environment of the engineering machinery such as excavator is often more severe, temperature is high, humidity is high, dust is many etc., and seriously polluted, battery valve is worked in the environment of high temperature and heavily contaminated, battery valve spool often occurs stuck, the faults such as coil burns out, actuator port pressure surge is larger, affects guide's generic operation element and normally uses, and battery valve price is high, user cost is high.
Model utility content
The utility model proposes a kind of guide oil source valve, solved the problems such as existing guide oil source valve easily damages, rate of fault height.
The technical solution of the utility model is achieved in that
A kind of guide oil source valve, comprises valve body and spool, is provided with the spool chamber of cylindricality in described valve body, the inwall of described spool chamber spaced apart backflow oil pocket, oil-feed oil pocket and the working oil chamber of being provided with successively from top to bottom; On described valve body, be also provided with filler opening, return opening and at least one actuator port; Described filler opening is communicated with described oil-feed oil pocket, and described return opening is communicated with described backflow oil pocket, and described actuator port is communicated with described working oil chamber; Described spool is cylindrical valve spool, and spool is divided into the portion of pressing, upper sealed department, connection portion, lower seal portion from top to bottom, and the outer wall of described upper sealed department and lower seal portion all fits in spool chamber inwall; Between the outer wall of described connection portion and the inwall of spool chamber, form a cavity, this cavity is communicated with oil-feed oil pocket, and this cavity is alternately communicated with backflow oil pocket and working oil chamber by the lifting of spool; The described portion that presses stretches out from the spool accent at valve body top; Between the bottom of described spool and the bottom of spool chamber, be provided with spring.
Further, described spool chamber runs through described valve body, the spool accent upper cover that is positioned at valve body bottom is provided with locking closure, described locking closure comprises lock collar and is convexly set in the slot part in lock collar, and described slot part embeds in described spool chamber, the end face indent of described slot part forms a cavity, is concaved with an annular groove on the outer wall of described slot part, is equiped with seal ring in annular groove.
Further, described spool is also provided with a card division, this card division is positioned at the bottom of spool, the cross sectional area of described card division is greater than the cross sectional area of lower seal portion, described spool chamber is divided into He Zhu chamber, secondary chamber, and described secondary chamber is positioned at below, described main chamber, and the cross sectional area in described secondary chamber is greater than the cross sectional area in main chamber, described card division is positioned at described secondary chamber, and described spring is positioned at described secondary chamber.
Further, described guide oil source valve also comprises relief valve, is also provided with overflow oil pocket in described valve body, is also provided with flow-off on valve body, and the chamber wall of described overflow oil pocket is provided with the first oilhole of connection work grease chamber and is communicated with the second oilhole of flow-off; The import of described relief valve is connected in described the first oilhole, and the outlet of described relief valve is connected in the second oilhole.
Further, the cross section of described spool chamber is circular, and the cross section of described spool is circular.
Known by above description, the utility model compared with prior art, the utlity model has following advantage:
1, spool chamber of the present utility model is cylindricality, offer successively from top to bottom backflow oil pocket, oil-feed oil pocket and working oil chamber at spool chamber, spool is followed successively by the portion of pressing, upper sealed department, connection portion and lower seal portion from top to bottom, only need to control spool straight moving to-and-fro motion in spool chamber, can control oil-feed oil pocket and backflow oil pocket connects or connects with working oil chamber, whole guide oil source valve simple in structure, reliable performance, long service life.
In the time of operation, only need utilize mechanical mechanism directly to control the spool of guide oil source valve, both directly controlled hydraulic pressure by machinery, the battery valve formula of comparing guide oil source valve, saved automatically controlled link, control mode is simpler and more direct, realizes reducing energy consumption, the advantage such as raising the efficiency, reduce costs.
2, the utility model is also provided with relief valve, and the pressure producing when operating load is while being greater than the pressure of relief valve, and safety overflow valve is opened, and pressure is remained in setting pressure, guarantees that hydraulic system normally works.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technological scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only embodiments more of the present utility model, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is structural representation of the present utility model;
Fig. 2 is main TV structure cross-sectional schematic of the present utility model;
Fig. 3 is the main TV structure cross-sectional schematic of valve body of the present utility model;
Fig. 4 be in Fig. 2 A-A to partial schematic sectional view.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technological scheme in the utility model embodiment is clearly and completely described, obviously, described embodiment is only the utility model part embodiment, rather than whole embodiments.Based on the embodiment in the utility model, those of ordinary skills are not making the every other embodiment who obtains under creative work prerequisite, all belong to the scope of the utility model protection.
With reference to Fig. 1-Fig. 4, a kind of guide oil source valve, comprises valve body 1 and spool 2, is provided with the spool chamber 11 of cylindricality in described valve body 1, the inwall of described spool chamber 11 spaced apart backflow oil pocket 3, oil-feed oil pocket 4 and the working oil chamber 5 of being provided with successively from top to bottom; On described valve body 1, be also provided with filler opening 12, return opening 13 and at least one actuator port 14; Described filler opening 12 is communicated with described oil-feed oil pocket 3, and described return opening 13 is communicated with described backflow oil pocket 4, and described actuator port 14 is communicated with described working oil chamber 5; Described spool 2 is cylindrical valve spool, spool 2 is divided into the portion of pressing 21, upper sealed department 22, connection portion 23, lower seal portion 24 from top to bottom, the cross section of upper sealed department 22 is identical with the cross section of lower seal portion 24, and upper sealed department 22 all fits in spool chamber 11 inwalls with the outer wall of lower seal portion 24; The cross sectional area of described connection portion 23 is less than the rank street area of sealed department 22; Between the inwall of the outer wall of connection portion 23 and spool chamber 11, form a cavity 230, this cavity 230 is communicated with oil-feed oil pocket 3, and this cavity 230 is alternately communicated with backflow oil pocket 4 and working oil chamber 5 by the lifting of spool 2; The described portion 21 that presses stretches out from the spool accent at valve body 1 top; Between the bottom of the bottom of described spool 2 and spool chamber 11, be provided with spring 6.
For the ease of the installation and maintenance of spool, spool chamber 11 of the present utility model runs through described valve body 1, the spool accent upper cover that is positioned at valve body 1 bottom is provided with locking closure 7, described locking closure 7 comprises lock collar 71 and is convexly set in the slot part 72 in lock collar 71, and described slot part 72 embeds in described spool chamber, the end face indent of described slot part 72 forms a cavity 70, the bottom of described cavity 70 is the bottom of spool chamber 11, on the outer wall of described slot part 72, be concaved with an annular groove 73, in annular groove 73, be equiped with seal ring, slot part 72 embeds in spool chamber 11, locking closure 7 is installed more firm, in the to-and-fro motion of spool 2, locking closure 7 is difficult for loosening, seal ring in annular groove 73 can prevent leakage of oil, strengthen sealing.
Excessive for fear of spool 2 motion amplitudes, cause the problems such as oil circuit connection has some setbacks, described spool 2 is also provided with a card division 25, this card division 25 is positioned at the bottom of spool 2, the cross sectional area of described card division 25 is greater than the cross sectional area of lower seal portion 24, described spool chamber 11 is divided into 112He Zhu chamber, secondary chamber 111, position 112, described secondary chamber is in 111 belows, described main chamber, and the cross sectional area in described secondary chamber 112 is greater than the cross sectional area in main chamber 111, described card division 25 is positioned at described secondary chamber 112, and described spring 6 is positioned at described secondary chamber 112.In the time that spool 2 moves, said structure makes the card division 25 of spool be limited in the interior activity in secondary chamber 112, avoids spool 2 to move offside.
Guide oil source valve of the present utility model also comprises relief valve 8, in described valve body 1, be also provided with overflow oil pocket 81, on valve body 1, be also provided with flow-off 15, the chamber wall of described overflow oil pocket 81 is provided with the first oilhole 811 of connection work grease chamber and is communicated with the second oilhole 812 of flow-off 15; The import of described relief valve 8 is connected in described the first oilhole, and the outlet of described relief valve is connected in the second oilhole.
Working principle of the present utility model is as follows:
At spool, not when pressurized, spool is in the time of initial position, and the oil-feed oil pocket 3 of guide oil source valve and backflow oil pocket 4 are directly communicated with by cavity 230, and the oil in oil-feed oil pocket 3 is directly got back to fuel tank by backflow oil pocket 4; In use, the portion that presses 21 that utilizes mechanical mechanism to press spool 2 tops moves downward spool 2, upper sealed department 22 moves down and seals backflow oil pocket 4, and lower seal portion 24 moves down and opens working oil chamber 5 oil-feed oil pocket 3 and working oil chamber 5 are connected by cavity 230, and pilot system is normally worked.In the time that mechanical mechanism unclamps spool, spool 2 resets to initial position under the effect of its bottom spring 6.
When the pressure producing when operating load is greater than the force value that relief valve 8 sets, relief valve 8 is opened, and guide oil source valve internal pressure is remained within the scope of setting pressure, guarantees that hydraulic system normally works.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all within spirit of the present utility model and principle, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection domain of the present utility model.
Claims (5)
1. a guide oil source valve, comprises valve body and spool, it is characterized in that: in described valve body, be provided with the spool chamber of cylindricality, the inwall of described spool chamber spaced apart backflow oil pocket, oil-feed oil pocket and the working oil chamber of being provided with successively from top to bottom;
On described valve body, be also provided with filler opening, return opening and at least one actuator port; Described filler opening is communicated with described oil-feed oil pocket, and described return opening is communicated with described backflow oil pocket, and described actuator port is communicated with described working oil chamber;
Described spool is cylindrical valve spool, and spool is divided into the portion of pressing, upper sealed department, connection portion, lower seal portion from top to bottom, and the outer wall of described upper sealed department and lower seal portion all fits in spool chamber inwall;
Between the outer wall of described connection portion and the inwall of spool chamber, form a cavity, this cavity is communicated with oil-feed oil pocket, and this cavity is alternately communicated with backflow oil pocket and working oil chamber by the lifting of spool;
The described portion that presses stretches out from the spool accent at valve body top; Between the bottom of described spool and the bottom of spool chamber, be provided with spring.
2. a kind of guide oil source valve as claimed in claim 1, it is characterized in that: described spool chamber runs through described valve body, the spool accent upper cover that is positioned at valve body bottom is provided with locking closure, described locking closure comprises lock collar and is convexly set in the slot part in lock collar, and described slot part embeds in described spool chamber, the end face indent of described slot part forms a cavity, is concaved with an annular groove on the outer wall of described slot part, is equiped with seal ring in annular groove.
3. a kind of guide oil source valve as claimed in claim 1, it is characterized in that: described spool is also provided with a card division, this card division is positioned at the bottom of spool, the cross sectional area of described card division is greater than the cross sectional area of lower seal portion, described spool chamber is divided into He Zhu chamber, secondary chamber, and described secondary chamber is positioned at below, described main chamber, and the cross sectional area in described secondary chamber is greater than the cross sectional area in main chamber, described card division is positioned at described secondary chamber, and described spring is positioned at described secondary chamber.
4. a kind of guide oil source valve as described in any one in claim 1-3, it is characterized in that: also comprise relief valve, in described valve body, be also provided with overflow oil pocket, on valve body, be also provided with flow-off, the chamber wall of described overflow oil pocket is provided with the first oilhole of connection work grease chamber and is communicated with the second oilhole of flow-off; The import of described relief valve is connected in described the first oilhole, and the outlet of described relief valve is connected in the second oilhole.
5. a kind of guide oil source valve as described in any one in claim 1-3, is characterized in that: the cross section of described spool chamber is for circular, and the cross section of described spool is circular.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320729596.XU CN203614493U (en) | 2013-11-18 | 2013-11-18 | Pilot oil source valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320729596.XU CN203614493U (en) | 2013-11-18 | 2013-11-18 | Pilot oil source valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203614493U true CN203614493U (en) | 2014-05-28 |
Family
ID=50767142
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320729596.XU Withdrawn - After Issue CN203614493U (en) | 2013-11-18 | 2013-11-18 | Pilot oil source valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203614493U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103603838A (en) * | 2013-11-18 | 2014-02-26 | 泉州鑫豪工程机械科技有限公司 | Pilot oil source valve |
-
2013
- 2013-11-18 CN CN201320729596.XU patent/CN203614493U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103603838A (en) * | 2013-11-18 | 2014-02-26 | 泉州鑫豪工程机械科技有限公司 | Pilot oil source valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20140528 Effective date of abandoning: 20160420 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |