CN2486756Y - Automatic high speed valve - Google Patents
Automatic high speed valve Download PDFInfo
- Publication number
- CN2486756Y CN2486756Y CN 01249317 CN01249317U CN2486756Y CN 2486756 Y CN2486756 Y CN 2486756Y CN 01249317 CN01249317 CN 01249317 CN 01249317 U CN01249317 U CN 01249317U CN 2486756 Y CN2486756 Y CN 2486756Y
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- CN
- China
- Prior art keywords
- interface
- valve
- communicated
- spool
- oil
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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- Fluid-Pressure Circuits (AREA)
Abstract
The utility model discloses an automatic fast valve used for a hydraulic shovel. The structure is that the middle part of a shuttle valve (1) is provided with a pilot valve (13) which is communicated with the shuttle valve (1), the valve cavity (10) of the pilot valve (13) is provided with an interface G (6) which is communicated with a control oil pump, an interface M (8) which is communicated with oil hydraulic motor and an interface T (7) which is communicated with a hydraulic fluid chamber; a valve core (5) is arranged in the valve cavity (10), the forehead of the valve core (5) is corresponding to the pilot valve (13) and assembled with the channel (14) of the shuttle valve (1), while between the tail-end of the valve core (5) and an end closure (11) a spring (12) is arranged, when the valve core (5) moves in the valve cavity (10), the middle part of the valve core (5) can make the interface M (8) choose a place and be communicated with the interface G (6) and the interface T (7); and the valve cavities between the interface M (8), the valve core (5) and the end closure (11) is communicated by an oil channel (9). The device has high density of integration which combines sampling and control together, and simple structure, furthermore, hydraulic advantage of the hydraulic shovel is played fully.
Description
Technical field: the utility model relates to valve field, particularly relates to a kind of automatic high speed valve.
Background technique: hydraulic shovel the time need be adjusted the speed of travel according to different load conditions automatically in walking, loads when high, and low speed driving is run at high speed when load is low.The technology that adopts is that pressure relay is housed in shuttle valve now, controls corresponding solenoid directional control valve with pressure relay inductive load variation in pressure, and then the control oil hydraulic motor changes the speed of travel.Such device level of integration is low, complex structure, and liquid electricity, the conversion of electric liquid will be passed through in the centre, and function realizes being subjected to the influence of conversion links and electric part, and fails to give full play to the hydraulic pressure advantage of hydraulic shovel.
Technology contents: technical problem to be solved in the utility model provides a kind of hydraulic pressure advantage that can give full play to hydraulic shovel, and level of integration height, automatic high speed valve simple in structure.
The technical solution adopted in the utility model is: be provided with the control valve that communicates with it at the middle part of shuttle valve, the valve pocket of control valve is provided with the interface T that interlinks with the interface M that controls interface G that oil pump communicates, interlink with oil hydraulic motor, with hydraulic oil container; In the valve pocket of control valve spool is housed, the front portion of spool is corresponding to the passage assembling of control valve and shuttle valve, between the afterbody of spool and the end cap spring is housed, spool in valve pocket when mobile its middle part can make oil hydraulic motor interface M select a ground with fuel tank interface T with control oil pump interface G and be communicated with; Oil hydraulic motor interface M and spool have oil circuit to be communicated with valve pocket between the end cap.
At system loading hour, the pressure P of two load hydraulic fluid ports of shuttle valve
2, P
3All less than the required setup pressure value of speed change, spool is under the effect of spring, and de-interfaced G and interface T connect interface G and interface M, and the pilot pressure of interface G is adjusted by interface M and then to oil hydraulic motor, and oil hydraulic motor is run at high speed.
When any place's pressure of two load hydraulic fluid ports of shuttle valve surpasses the force value that this valve sets, pressure oil promotes steel ball, pressure oil enters the valve pocket of control valve, promotes the spool pressure spring and moves to right, and the spool middle part cuts off interface G and interface M, and be communicated with interface M and interface T simultaneously, this moment, the pilot pressure of interface G cut off, and oil hydraulic motor interface M communicates with fuel tank interface T, and pressure reduces to zero, the control oil pump can not be adjusted hydraulic motor speed, makes the oil hydraulic motor low speed driving.
When the force value of two load hydraulic fluid ports of shuttle valve reduced, spool began to move to left under spring action, and finally connects interface G and interface M and cut off interface T and interface G, and oil hydraulic motor is run at high speed.
The utility model is owing to adopted such scheme, with moving of spool the pilot pressure of oil hydraulic motor is controlled, replaced pressure relay to the control that pilot pressure carries out, the influence that conversion links and electric part are realized function has been got rid of in the liquid electricity in the middle of having reduced, the conversion of electric liquid.This device level of integration height, collection is taken a sample, is controlled in one, and is simple in structure, and given full play to the hydraulic pressure advantage of hydraulic shovel.
Description of drawings:
Fig. 1 is hour the utility model phase diagram of system loading;
Fig. 2 is system loading the utility model phase diagram when big.
Embodiment: be provided with the control valve 13 that communicates with it at the middle part of shuttle valve 1, the valve pocket 10 of control valve 13 is provided with the interface T7 that interlinks with the interface M8 that controls interface G6 that oil pump communicates, interlink with oil hydraulic motor, with hydraulic oil container; Spool 5 is housed in the valve pocket 10, the front portion of spool 5 is corresponding to passage 14 assemblings of control valve 13 with shuttle valve 1, between spool 5 and the end cap 11 spring 12 is housed, spool 5 in valve pocket 10 when mobile its middle part can make oil hydraulic motor interface M8 select a ground with fuel tank interface T7 with control oil pump interface G6 and be communicated with; Oil hydraulic motor interface M8 and spool 5 are communicated with by oil circuit 9 with valve pocket between the end cap 11.
At system loading hour, the pressure P of two load hydraulic fluid ports 2,3 of shuttle valve 1
2, P
3All less than the required setup pressure value of speed change, spool 5 is under spring 12 effects, and de-interfaced G6 and interface T8 connect interface G6 and interface M8, and the pilot pressure of interface G6 is adjusted by interface M8 and then to oil hydraulic motor, and oil hydraulic motor is run at high speed.
When any place's pressure of two load hydraulic fluid ports of shuttle valve 1 surpasses the force value that this valve sets, pressure oil promotes steel ball 2, pressure oil enters the valve pocket 10 of control valve 13 by passage 14, promoting spool 5 pressure springs 12 moves to right, spool 5 cuts off interface G6 and interface M8, and be communicated with interface M8 and interface T7 simultaneously, this moment, the pilot pressure of interface G6 cut off, oil hydraulic motor interface M8 communicates with fuel tank interface T7, pressure reduces to zero, the control oil pump can not be adjusted hydraulic motor speed, makes the oil hydraulic motor low speed driving.
When the force value of two load hydraulic fluid ports of shuttle valve 1 reduced, spool 5 began to move to left under spring 12 effects, and finally connects interface G6 and interface M8 and cut off interface T7 and interface G6, and oil hydraulic motor is run at high speed.
The spool force analysis: referring to structural drawing, establishing spool 5 left side boss areas is α, and right side boss area is A, and spring 12 elasticity coefficient are K, and spring 12 decrements are X, and shuttle valve 1 interface pressure is P, and interface G6 pressure is P
G, interface M8 pressure is P
M, then have:
P*α＝P
M*A+K*X (P
M＝P
G)
As P* α＞P
M* during A+K*X, this moment P
M=P
G, spool 5 begins to move to right, and finally cuts off interface G6 and interface M8, is communicated with interface M8 and interface T7 simultaneously, and motor begins low speed driving.And afterwards because interface G6 and interface M8 cut-out, i.e. P
M≠ P
G, and P
M=0, then have: P* α=K*X
When the force value of P reduces, during K*X＞P* α, spool 5 begins to move to left, and finally is communicated with interface G6 and interface M8, cuts off interface M8 and interface T7, and oil hydraulic motor is run at high speed.
Claims (1)
- A kind of automatic high speed valve, comprise shuttle valve (1) and the interface (3,4) that is communicated with load oil pump separately respectively, it is characterized in that: the middle part of shuttle valve (1) is provided with it the control valve (13) that is communicated with, and the valve pocket (10) of control valve (13) is provided with and controls interface G (6), the interface M (8) that communicates with oil hydraulic motor that oil pump communicates, the interface T (7) that communicates with hydraulic oil container; Spool (5) is contained in the valve pocket (10), the front portion of spool (5) is corresponding to passage (14) assembling of control valve (13) with shuttle valve (1), between the afterbody of spool (5) and the end cap (11) spring (12) is arranged, spool (5) in valve pocket (10) when mobile its middle part can make interface M (8) select a ground to be communicated with interface G (6) and interface T (7); There is oil circuit (9) to be communicated with between the valve pocket between interface M (8) and spool (5) and the end cap (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01249317 CN2486756Y (en) | 2001-07-19 | 2001-07-19 | Automatic high speed valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01249317 CN2486756Y (en) | 2001-07-19 | 2001-07-19 | Automatic high speed valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2486756Y true CN2486756Y (en) | 2002-04-17 |
Family
ID=33659750
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01249317 Expired - Lifetime CN2486756Y (en) | 2001-07-19 | 2001-07-19 | Automatic high speed valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2486756Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103244493A (en) * | 2012-02-02 | 2013-08-14 | 罗伯特·博世有限公司 | Valve assembly with pilot pump |
| CN108488127A (en) * | 2018-04-29 | 2018-09-04 | 锦州力特液压科技有限公司 | The two position switching valve groups for all-hydraulic tunnel drilling rig executing agency |
-
2001
- 2001-07-19 CN CN 01249317 patent/CN2486756Y/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103244493A (en) * | 2012-02-02 | 2013-08-14 | 罗伯特·博世有限公司 | Valve assembly with pilot pump |
| CN108488127A (en) * | 2018-04-29 | 2018-09-04 | 锦州力特液压科技有限公司 | The two position switching valve groups for all-hydraulic tunnel drilling rig executing agency |
| CN108488127B (en) * | 2018-04-29 | 2023-11-14 | 锦州力特液压科技有限公司 | Two-position reversing valve group for actuating mechanism of full-hydraulic tunnel drilling machine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: KUNSHAN CITY SANYI HEAVY MACHINERY CO., LTD. Free format text: FORMER OWNER: SANY HEAVY INDUSTRY CO., LTD. Effective date: 20040528 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20040528 Address after: 200121 No. 65 the Yellow River North Road, Kunshan Development Zone, Kunshan, Jiangsu Patentee after: Kunshan City Sanyi Heavy Industry Co., Ltd. Address before: 410100 31 industrial city, Xingsha economic and Technological Development Zone, Hunan, Changsha Patentee before: Sanyi Heavy Industry Co., Ltd. |
|
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20110719 Granted publication date: 20020417 |