CN102536939B - Root overflow valve - Google Patents
Root overflow valve Download PDFInfo
- Publication number
- CN102536939B CN102536939B CN201210000639.0A CN201210000639A CN102536939B CN 102536939 B CN102536939 B CN 102536939B CN 201210000639 A CN201210000639 A CN 201210000639A CN 102536939 B CN102536939 B CN 102536939B
- Authority
- CN
- China
- Prior art keywords
- oil
- mounting hole
- connecting rod
- guide
- duct
- 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 - Fee Related
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- Safety Valves (AREA)
- Valve Housings (AREA)
Abstract
The invention discloses a root overflow valve comprising a transitional block, wherein a pilot oil passage which is communicated with the left and the right sides of the transitional block is formed in the transitional block; a screw plug is mounted at the opening at the left end of the pilot oil passage in a sealed manner; a spring seat is arranged on the inner surface of the screw plug; a spring is sleeved on the spring seat; a valve core, which is slidably mounted in the pilot oil passage, is fixedly mounted at the right end of the spring; a pilot oil inlet connector is arranged on the right side wall of the pilot oil passage; an overflow valve mounting hole and an oil inlet connecting rod mounting hole are formed in the upper and the lower surfaces of the transitional block; the bottoms of the overflow valve mounting hole and the oil inlet connecting rod mounting hole are communicated with the pilot oil passage respectively; an overflow valve is mounted in the overflow valve mounting hole; and an oil inlet connecting rod is mounted in the oil inlet connecting rod mounting hole. The root overflow valve has the advantages that the micro operation of an excavating machine can be fulfilled easily; the operation is harmonious; and oil distribution is reasonable and ordered.
Description
Technical field
The present invention relates to a kind of root overflow valve.
Background technique
cannot match with little latus rectum hydrovalve for more current excavators, and the hydrovalve of current little latus rectum has many bottlenecks in manufacture, processing, assembling, context of detection.
Summary of the invention
The invention provides one to be convenient to excavator fine motion work, to be conducive to coordination, fluid distributes the root overflow valve of rational and orderly.
Technical solution problem of the present invention provides following scheme:
A kind of root overflow valve, comprise transition block, it is characterized in that: described transition block is provided with a left side, the guide oil oil duct of right UNICOM, the left end opening of described guide oil oil duct is sealed and installed with plug screw, the internal surface of described plug screw is provided with spring seat, on described spring seat, cover has spring, the right-hand member of described spring is installed with spool, described spool is slidably mounted in guide oil oil duct, the right side wall of described guide oil oil duct is provided with guide oil fuel inlet fitting, described transition block upper, lower surface is provided with relief valve mounting hole and oil-feed connecting rod mounting hole, bottom described relief valve mounting hole, bottom oil-feed connecting rod mounting hole respectively with guide oil oil duct UNICOM, in described relief valve mounting hole, relief valve is installed, in described oil-feed connecting rod mounting hole, oil-feed connecting rod is installed.
The sidewall of the guide oil oil duct on the right side of the spool installed in described guide oil oil duct is provided with left and right two grooves, the relief valve mounting hole of described left side groove UNICOM upper end, oil-feed link groove below described the right groove UNICOM, when spool stressed extrusion spring to the right time, left and right two grooves can be closed by spool.
Described oil-feed connecting rod is provided with the oil-feed oil duct and oil return oil duct that run through connecting rod front end and back end, and the sidewall of described oil-feed connecting rod is provided with filler opening and the oil outlet of oil return oil duct.
The sidewall of described relief valve mounting hole is provided with drainback passage, the filler opening of the oil return oil duct on described drainback passage UNICOM oil-feed connecting rod.
The sidewall of described oil-feed connecting rod mounting hole is provided with the oil circuit of UNICOM's guide oil oil duct.
The present invention with the addition of a root overflow valve (3 2 logical valves) before original relief valve, and the control port of this valve communicates with pilot valve and main valve stem pilot port.Pilot pressure 32 logical valves when certain stage are in diverse location, thus the coordination of excavator fine motion work, big-movement can be ensured, make large gauge multi-way valve can replace little latus rectum hydrovalve, reach fluid and distribute rational and orderly, thus solve the deficiency of the aspect such as casting processing, assembling that conventional lattice hydrovalve exists.
Working procedure of the present invention:
Hydraulic oil is entered from the filler opening of oil-feed connecting rod, arrive the bottom of oil-feed connecting rod mounting hole, enter in left groove from the right groove guide oil oil duct sidewall, enter in the relief valve mounting hole of upper end by the groove in left side again, at this moment, guide oil jointing on the right side of transition block connects guide oil again, when guide oil enters in guide oil oilhole, spool is extruded, when spool is extruded, spool can be moved to the left, and the oil through of left and right groove can reduce by the sidewall of spool gradually, and detailed process is:
When guide oil pressure is at 0-9bar, this spool is in leftmost bit, and at this moment digging machine is in big-movement state; When pilot pressure is at 9-18bar, this valve is in meta, starts throttling, is convenient to fine motion and does; When pilot pressure is at 18-40bar, this valve is in rightmost position, and cut off relief valve, enable its main valve set up pressure, the stroke of each main valve also has reduction in varying degrees at the same time.Its object is exactly the opening degree reducing main valve, and change its flow, the spring rate also corresponding raising of each main valve, its objective is the coordination in order to solve during operation, makes AV280 multi-way valve can meet the characteristic requirements of AV170 valve completely.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Embodiment
See accompanying drawing, a kind of root overflow valve, comprise transition block 1, described transition block 1 is provided with a left side, the guide oil oil duct 2 of right UNICOM, the left end opening of described guide oil oil duct 2 is sealed and installed with plug screw 3, the internal surface of described plug screw 3 is provided with spring seat 4, on described spring seat 4, cover has spring 5, the right-hand member of described spring 5 is installed with spool 6, described spool 6 is slidably mounted in guide oil oil duct 2, the right side wall of described guide oil oil duct 2 is provided with guide oil fuel inlet fitting 7, described transition block 1 upper, lower surface is provided with relief valve mounting hole 8 and oil-feed connecting rod mounting hole 9, bottom described relief valve mounting hole 8, bottom oil-feed connecting rod mounting hole 9 respectively with guide oil oil duct 2 UNICOM, in described relief valve mounting hole 8, relief valve 10 is installed, in described oil-feed connecting rod mounting hole 9, oil-feed connecting rod 11 is installed.
The sidewall of the guide oil oil duct 2 on the right side of the spool 6 installed in described guide oil oil duct 2 is provided with left and right two grooves 12,13, the relief valve mounting hole 8 of described left side groove 12 UNICOM upper end, oil-feed link groove 9 below groove 13 UNICOM of described the right, when spool 6 stressed extrusion spring to the right 5 time, left and right two grooves 12,13 can be closed by spool 6.
Described oil-feed connecting rod 11 is provided with the oil-feed oil duct 14 and oil return oil duct 15 that run through connecting rod front end and back end, and the sidewall of described oil-feed connecting rod 11 is provided with filler opening 16 and the oil outlet 17 of oil return oil duct.
The sidewall of described relief valve mounting hole 8 is provided with drainback passage 18, the filler opening 16 of the oil return oil duct on described drainback passage 18 UNICOM oil-feed connecting rod 11.
The sidewall of described oil-feed connecting rod mounting hole 9 is provided with the oil circuit 19 of UNICOM's guide oil oil duct 2.
Claims (1)
1. a root overflow valve, comprise transition block, it is characterized in that: described transition block is provided with a left side, the guide oil oil duct of right UNICOM, the left end opening of described guide oil oil duct is sealed and installed with plug screw, the internal surface of described plug screw is provided with spring seat, on described spring seat, cover has spring, the right-hand member of described spring is installed with spool, described spool is slidably mounted in guide oil oil duct, the right side wall of described guide oil oil duct is provided with guide oil fuel inlet fitting, described transition block upper, lower surface is provided with relief valve mounting hole and oil-feed connecting rod mounting hole, bottom described relief valve mounting hole, bottom oil-feed connecting rod mounting hole respectively with guide oil oil duct UNICOM, in described relief valve mounting hole, relief valve is installed, in described oil-feed connecting rod mounting hole, oil-feed connecting rod is installed, described oil-feed connecting rod is provided with the oil-feed oil duct and oil return oil duct that run through connecting rod front end and back end, and the sidewall of described oil-feed connecting rod is provided with filler opening and the oil outlet of oil return oil duct, the sidewall of the guide oil oil duct on the right side of the spool installed in described guide oil oil duct is provided with left and right two grooves, the relief valve mounting hole of described left side groove UNICOM upper end, oil-feed link groove below described the right groove UNICOM, when spool stressed extrusion spring to the right time, left and right two grooves can be closed by spool, the sidewall of described relief valve mounting hole is provided with drainback passage, the filler opening of the oil return oil duct on described drainback passage UNICOM oil-feed connecting rod, the sidewall of described oil-feed connecting rod mounting hole is provided with the oil circuit of UNICOM's guide oil oil duct.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210000639.0A CN102536939B (en) | 2012-01-04 | 2012-01-04 | Root overflow valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210000639.0A CN102536939B (en) | 2012-01-04 | 2012-01-04 | Root overflow valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102536939A CN102536939A (en) | 2012-07-04 |
| CN102536939B true CN102536939B (en) | 2015-01-14 |
Family
ID=46344666
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210000639.0A Expired - Fee Related CN102536939B (en) | 2012-01-04 | 2012-01-04 | Root overflow valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102536939B (en) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1011733B (en) * | 1985-09-06 | 1991-02-20 | 日立建机株式会社 | Flow controlling valve with pressure compensation |
| US6164322A (en) * | 1999-01-15 | 2000-12-26 | Saturn Electronic & Engineering, Inc. | Pressure relief latching solenoid valve |
| DE102004014485B3 (en) * | 2004-03-24 | 2005-09-15 | Sauer-Danfoss (Neumünster) GmbH & Co OHG | Pressure relief valve for hydraulic system has a sliding valve body and forms a pressure-sealed chamber for a valve spring |
| CN101749447B (en) * | 2008-12-03 | 2010-12-29 | 徐州重型机械有限公司 | Flow control valve |
| CN201705749U (en) * | 2010-07-02 | 2011-01-12 | 上海立新液压有限公司 | Hydraulic control flow valve provided with overflow valve plug-in unit and pressure compensation plug-in unit |
-
2012
- 2012-01-04 CN CN201210000639.0A patent/CN102536939B/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN102536939A (en) | 2012-07-04 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150114 |