CN102312878B - Hydraulic reducing valve - Google Patents
Hydraulic reducing valve Download PDFInfo
- Publication number
- CN102312878B CN102312878B CN 201110283857 CN201110283857A CN102312878B CN 102312878 B CN102312878 B CN 102312878B CN 201110283857 CN201110283857 CN 201110283857 CN 201110283857 A CN201110283857 A CN 201110283857A CN 102312878 B CN102312878 B CN 102312878B
- Authority
- CN
- China
- Prior art keywords
- oil
- valve seat
- oil inlet
- communicated
- spool
- 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
Links
- 239000003921 oil Substances 0.000 claims abstract description 77
- 239000010720 hydraulic oil Substances 0.000 claims abstract description 5
- 239000000945 filler Substances 0.000 claims description 7
- 230000008901 benefit Effects 0.000 abstract description 3
- 230000006837 decompression Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
Images
Landscapes
- Safety Valves (AREA)
Abstract
A hydraulic reducing valve comprises a valve seat with an end cover at the top end, wherein an oil inlet channel is arranged in the valve seat, the lower end of the oil inlet channel is an oil inlet which is positioned at the high pressure side of the lower end of the valve seat, the upper end opening of the oil inlet channel is communicated with a control oil cavity, and the bore of the control oil cavity is larger than that of the oil inlet channel; one side of the upper end of the oil inlet channel is provided with an oil outlet channel to be communicated with an oil outlet of the low pressure side which is positioned at one side of the valve seat, and the oil outlet channel is communicated with the control oil cavity through a communication channel; and a concave valve plug with a large diameter at the upper part and a small diameter at the lower part is arranged in the valve seat, when the self weight of the concave valve plug is larger than the upwards pushing force of the hydraulic oil on the valve plug, the valve plug upper part with the large diameter is positioned in the control oil cavity, the lower part with the small diameter is positioned at the upper part of the oilinlet channel and seals the oil outlet channel. The hydraulic reducing valve provided by the invention has the advantages of accurate variable pressure, long service life, simple structure, safety, reliability, no regulation and the like.
Description
Technical field
The present invention relates to a kind of hydraulic pressure reducing device, belong to the hydraulics field, for high oil pressure decompression is the element of low oil pressure.
Background technique
At the widely used reduction valve of Hydraulic Field, owing to adopting spring-loaded plunger or spring diaphragm structure, it has poor repeatability, and the shortcoming that operating life is short, leakage rate is large is needed improvement badly.
Summary of the invention
The technical problem to be solved in the present invention is, the defective for prior art exists proposes a kind of hydraulic relief valve, have transformation accurately, long working life, simple in structure, safe and reliable, need not the advantage such as adjusting.
Technological scheme of the present invention is, described hydraulic relief valve comprises that there is the valve seat of end cap on the top, its structural feature is, be provided with oil inlet passage in the valve seat, the lower end of this oil inlet passage is the high pressure side filler opening that is positioned at the valve seat lower end, the upper end-hole of oil inlet passage is communicated with the control oil pocket, and the aperture of control oil pocket is greater than the aperture of oil inlet passage; Oil inlet passage upper end one side has oil discharge passage to be communicated to be positioned at the low voltage side oil outlet of valve seat one side, and described oil discharge passage is communicated with the control oil pocket through communicating passage; The large and less convex spool of lower diameter of upper diameter is arranged in the valve seat, and when the convex spool when deadweight is subject to thrust that hydraulic oil makes progress greater than this spool, the larger top of this valve core diameter is positioned at the control oil pocket, and the bottom that diameter is less is positioned at oil inlet passage top and described oil discharge passage is sealed.
Below the present invention made further specify.
Working procedure of the present invention is (referring to Fig. 1), when high pressure side filler opening 4 is connected with high pressure oil, the pressure that acts on convex spool 3 lower end surfaces 12 promotes convex spool 3 and moves up, and this moment, low voltage side oil outlet 6 was communicated with high pressure side filler opening 4, and pressure oil enters low voltage side oil outlet 6; Simultaneously, low-pressure lateral pressure oil enters the upper-end surface 13 of controlling oil pocket 9 and acting on convex spool 3 through communicating passage 7,13 produce pressure in the upper-end surface, because the large (structure that the less bottom 10 of diameter larger top 11 and diameter is arranged because of convex spool 2 of the area of the Area Ratio lower end surface 12 of upper-end surface 13, referring to Fig. 2), the power of the hydraulic oil of same large pressure 13 generations in the upper-end surface are greater than the active force on the lower end surface 12, so promoting convex spool 3 moves down, until convex spool 3 covers in the oil discharge passage that is communicated with low voltage side oil outlet 6, convex spool 3 stops mobile at this moment, the pressure oil of high pressure side filler opening 4 can not enter low voltage side oil outlet 6, has realized the decompression of pressure oil.The suitable area ratio of the upper-end surface 13 of choose reasonable convex spool 3 and lower end surface 12 just can be realized the decompression of different pressures grade.
Know-why of the present invention is, adopt the convex spool to realize the change level transmission of pressure, can recently realize by the different area of design convex spool both ends of the surface the minification of incoming pressure, control chamber pressure oil from the low voltage side oil outlet produces pilot pressure at the large end face of convex spool, compare at the pressure of the small end face generation of convex spool with high pressure side inlet pressure oil, by the transient equiliblium that moves up and down to realize spool of spool, keep delivery pressure within allowed band.
As known from the above, the present invention is a kind of hydraulic relief valve, have transformation accurately, long working life, simple in structure, safe and reliable, need not the advantage such as adjusting.
Description of drawings
Fig. 1 is the structural representation of an embodiment of the present invention;
Fig. 2 is the structural representation of convex spool among Fig. 1;
Fig. 3 is the structural representation of valve seat among Fig. 1.
In the drawings:
1-end cap, 1,2-valve seat, 3-convex spool,
4-high pressure side filler opening 4,5-flow-off, 6-low voltage side oil outlet 6,
7-communicating passage, 8-oil inlet passage, 9-control oil pocket,
The bottom that 10-diameter is less, the top that 11-diameter is larger, 12-lower end surface,
13-upper-end surface.
Embodiment
As shown in Figure 1 to Figure 3, described hydraulic relief valve comprises that there is the valve seat 2 of end cap 1 on the top, be provided with oil inlet passage 8 in the valve seat 2, the lower end of this oil inlet passage 8 is the high pressure side filler openings 4 that are positioned at valve seat 2 lower ends, the upper end-hole of oil inlet passage 8 is communicated with control oil pocket 9, and the aperture (diameter) of control oil pocket 9 is greater than the aperture (diameter) of oil inlet passage 8; Oil inlet passage 8 upper ends one side has oil discharge passage to be communicated to be positioned at the low voltage side oil outlet 6 of valve seat 2 one sides, and described oil discharge passage is communicated with control oil pockets 9 through communicating passage 7; The large and less convex spool 3 of lower diameter of upper diameter is arranged in the valve seat 2, and when convex spool 3 when deadweight is subject to thrust that hydraulic oil makes progress greater than this spool 3, the top 11 that these spool 3 diameters are larger is positioned at control oil pocket 9, and the bottom 10 that diameter is less is positioned at oil inlet passage 8 tops and described oil discharge passage is sealed.
Also be provided with the flow-off 5 that is communicated with described oil discharge passage in the described valve seat 2.
Claims (2)
1. hydraulic relief valve, comprise that there is the valve seat (2) of end cap (1) on the top, it is characterized in that, be provided with oil inlet passage (8) in the valve seat (2), the lower end of this oil inlet passage (8) is the high pressure side filler opening (4) that is positioned at valve seat (2) lower end, the upper end-hole of oil inlet passage (8) is communicated with control oil pocket (9), and the aperture of control oil pocket (9) is greater than the aperture of oil inlet passage (8); Oil inlet passage (8) upper end one side has oil discharge passage to be communicated to be positioned at the low voltage side oil outlet (6) of valve seat (2) one sides, and described oil discharge passage is communicated with control oil pocket (9) through communicating passage (7); The large and less convex spool (3) of lower diameter of upper diameter is arranged in the valve seat (2), and when convex spool (3) when deadweight is subject to thrust that hydraulic oil makes progress greater than this spool (3), the top (11) that this spool (3) diameter is larger is positioned at control oil pocket (9), and the bottom that diameter is less (10) are positioned at oil inlet passage (8) top and described oil discharge passage is sealed.
2. described hydraulic relief valve according to claim 1 is characterized in that, also is provided with the flow-off (5) that is communicated with described oil discharge passage in the described valve seat (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110283857 CN102312878B (en) | 2011-09-22 | 2011-09-22 | Hydraulic reducing valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110283857 CN102312878B (en) | 2011-09-22 | 2011-09-22 | Hydraulic reducing valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102312878A CN102312878A (en) | 2012-01-11 |
| CN102312878B true CN102312878B (en) | 2013-09-18 |
Family
ID=45426336
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110283857 Expired - Fee Related CN102312878B (en) | 2011-09-22 | 2011-09-22 | Hydraulic reducing valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102312878B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RO104119B1 (en) * | 1989-10-20 | 1993-12-15 | Inst Cercetari Stiintifice | Proportional pressure reducer |
| CN1122885A (en) * | 1994-11-05 | 1996-05-22 | 林茂森 | Adjustable pressure reduction valve |
| CN2347029Y (en) * | 1998-09-22 | 1999-11-03 | 王立朝 | Pressure reducing valve |
| JP3058841B2 (en) * | 1997-03-03 | 2000-07-04 | 株式会社コーアツ | Decompression device |
| CN202228454U (en) * | 2011-09-22 | 2012-05-23 | 华自科技股份有限公司 | Hydraulic relief valve |
-
2011
- 2011-09-22 CN CN 201110283857 patent/CN102312878B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RO104119B1 (en) * | 1989-10-20 | 1993-12-15 | Inst Cercetari Stiintifice | Proportional pressure reducer |
| CN1122885A (en) * | 1994-11-05 | 1996-05-22 | 林茂森 | Adjustable pressure reduction valve |
| JP3058841B2 (en) * | 1997-03-03 | 2000-07-04 | 株式会社コーアツ | Decompression device |
| CN2347029Y (en) * | 1998-09-22 | 1999-11-03 | 王立朝 | Pressure reducing valve |
| CN202228454U (en) * | 2011-09-22 | 2012-05-23 | 华自科技股份有限公司 | Hydraulic relief valve |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102312878A (en) | 2012-01-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101922445B (en) | Constant power control valve | |
| CN104769272B (en) | Valve gear | |
| CN106090362B (en) | A kind of direct-acting overflow valve | |
| CN202510790U (en) | Pilot-operated cage type single seat regulating valve | |
| CN202228454U (en) | Hydraulic relief valve | |
| CN107631064B (en) | It can be used for the ratio one-way flow valves of low-load | |
| CN101275685B (en) | Emulsifiable solution medium large flow safety valve | |
| CN109826984B (en) | Pilot-operated safety valve | |
| CN102312878B (en) | Hydraulic reducing valve | |
| KR20150021165A (en) | Hydro-pneumatic type relief valve | |
| CN108692037A (en) | A kind of pilot-operated type fluid-controlled cut-off valve | |
| CN205918680U (en) | Superhigh pressure pressure control valve | |
| CN103470561A (en) | Proportional overflow valve | |
| CN102072216B (en) | Energy-saving reducing valve for hydraulic system | |
| CN102135093B (en) | Linear conjugate internal gearing gear pump | |
| CN108798956A (en) | A kind of common-rail injector control oil channel structures | |
| CN104712798A (en) | Combined pressure relief valve | |
| CN106122152B (en) | Ultra high pressure control valve | |
| CN102287164A (en) | Control valve for hydraulic well mouth safety valve control system | |
| CN101463811B (en) | Pressure-regulating spilling system of plunger type high-pressure water pump | |
| CN204140099U (en) | A kind of insertion liquid pressure valve | |
| CN221300991U (en) | Combined valve structure for liquid hydrogen station liquid drive pipeline | |
| CN205908548U (en) | Prevent superpressure relief pressure valve | |
| CN203892638U (en) | Multifunctional automatic recirculating pump protection valve | |
| CN205013427U (en) | Novel pressure reducing valve |
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 |
Granted publication date: 20130918 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |