CN203962571U - A kind of pressure-releasing device for hydraulic-machine system - Google Patents
A kind of pressure-releasing device for hydraulic-machine system Download PDFInfo
- Publication number
- CN203962571U CN203962571U CN201420255981.XU CN201420255981U CN203962571U CN 203962571 U CN203962571 U CN 203962571U CN 201420255981 U CN201420255981 U CN 201420255981U CN 203962571 U CN203962571 U CN 203962571U
- Authority
- CN
- China
- Prior art keywords
- valve
- plug
- pressure
- hydraulic
- oil cylinder
- 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
Abstract
The utility model discloses a kind of pressure-releasing device for hydraulic-machine system, comprise fuel tank (11), Oil pump electrical machinery group (1), plug in valve I (2), plug in valve II (7), pilot valve (9), relief valve I (8), relief valve II (10), pressure gauge (3), oil cylinder (6) and topping up case (4), fuel tank (11) is connected with Oil pump electrical machinery group (1), Oil pump electrical machinery group (1) is connected with plug in valve II (7) with plug in valve I (2) respectively by pipeline, on described plug in valve II (7), be connected with pilot valve (9), pilot valve (9) is connected with relief valve II (10) with relief valve I (8) respectively, the pipeline that plug in valve I (2) is connected with oil cylinder (6) is provided with pressure gauge (3), oil cylinder (6) is connected by pipeline with topping up case (4).The utility model is without increasing separately one group of plug-in unit and pilot valve, and hydraulic system is simple, reduces costs and rate of fault, makes hydraulic system reliable and stable.
Description
Technical field
The utility model relates to a kind of pressure relief device, and specifically a kind of pressure-releasing device for hydraulic-machine system, belongs to machinery manufacturing technology field.
Background technique
At present, on liquid-filling valve in the hydraulic system of hydraulic press with letting out in advance spool, after oil cylinder pressurize time delay, while needing pressure release backhaul, must first open and let out in advance spool, cylinder upper cavity oil pressure is slowly let out to zero pressure, and then backhaul, like this during hydraulic press backhaul more steadily with without impact, but using when letting out in advance the liquid-filling valve of spool, hydraulic system needs to increase separately one group of plug-in unit and pilot valve and carrys out pre-draining cylinder upper cavity pressure, will cause the complicated of hydraulic system like this, raise the cost, and rate of fault is corresponding increase also, cause stability and the reliability decrease of hydraulic system.
Summary of the invention
The problem existing for above-mentioned prior art, the utility model provides a kind of pressure-releasing device for hydraulic-machine system, and without increasing separately one group of plug-in unit and pilot valve, hydraulic system is simple, reduces costs and rate of fault, makes hydraulic system reliable and stable.
To achieve these goals, the utility model is achieved through the following technical solutions: a kind of pressure-releasing device for hydraulic-machine system, comprise fuel tank, Oil pump electrical machinery group, plug in valve I, plug in valve II, pilot valve, relief valve I, relief valve II, pressure gauge, oil cylinder and topping up case, fuel tank is connected with Oil pump electrical machinery group, Oil pump electrical machinery group is connected with plug in valve II with plug in valve I respectively by pipeline, on described plug in valve II, be connected with pilot valve, pilot valve is connected with relief valve II with relief valve I respectively, the pipeline that plug in valve I is connected with oil cylinder is provided with pressure gauge, and oil cylinder is connected by pipeline with topping up case.
Further, described oil cylinder comprises cylinder upper cavity oil and oil cylinder cavity of resorption.
Further, also comprise liquid-filling valve, described liquid-filling valve is arranged on the pipeline between oil cylinder and topping up case.
The beneficial effects of the utility model are: by inserting the cooperation of valve, pilot valve and relief valve, realize hydraulic system pressure release, make liquid-filling valve in use safer, and reduced assembly compared with the hydraulic system pressure release of prior art, thereby make hydraulic system structure simple, effectively reduce cost and rate of fault, guarantee the safety of hydraulic system and stablize.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
In figure: 1, Oil pump electrical machinery group, 2, plug in valve I, 3, pressure gauge, 4, topping up case, 5, liquid-filling valve, 6, oil cylinder, 7, plug in valve II, 8, relief valve I, 9, pilot valve, 10, relief valve II, 11, fuel tank.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described further.
As shown in Figure 1, a kind of pressure-releasing device for hydraulic-machine system, comprise fuel tank 11, Oil pump electrical machinery group 1, plug in valve I2, plug in valve II7, pilot valve 9, relief valve I, relief valve II10, pressure gauge 3, oil cylinder 6 and topping up case 4, fuel tank 11 is connected with Oil pump electrical machinery group 1, Oil pump electrical machinery group 1 is connected with plug in valve II7 with plug in valve I2 respectively by pipeline, on described plug in valve II7, be connected with pilot valve 9, pilot valve 9 is connected with relief valve II10 with relief valve I8 respectively, the pipeline that plug in valve I2 is connected with oil cylinder 6 is provided with pressure gauge 3, and oil cylinder 6 is connected by pipeline with topping up case 4.
Described oil cylinder 6 comprises cylinder upper cavity oil and oil cylinder cavity of resorption.
On described oil cylinder 6 and the pipeline between topping up case 4, liquid-filling valve 5 is installed.
Working procedure: Oil pump electrical machinery group 1 starting, by fuel tank 11 fuel feeding, by plugging in valve II7, the hydraulic oil of fuel tank 11 oil sump tank 11 again, Oil pump electrical machinery group 1 belongs to no load condition, pilot valve 9 energisings, relief valve II10 has been adjusted to pressure, plugs in valve II7 and closes, system has pressure, and hydraulic oil is thrown cylinder upper cavity oil into by plugging in valve I2; When the complete pressure release of work, pilot valve 9 energisings, relief valve I8 pressure regulation, when cylinder upper cavity oil hydraulic oil is first zero from plug in valve II7 pressure release to pressure gauge 3 pressure, and then opens liquid-filling valve 5, and a large amount of hydraulic oil of cylinder upper cavity oil is flowed in topping up case 4.
Claims (3)
1. a pressure-releasing device for hydraulic-machine system, it is characterized in that, comprise fuel tank (11), Oil pump electrical machinery group (1), plug in valve I (2), plug in valve II (7), pilot valve (9), relief valve I (8), relief valve II (10), pressure gauge (3), oil cylinder (6) and topping up case (4); Described fuel tank (11) is connected with Oil pump electrical machinery group (1), Oil pump electrical machinery group (1) is connected with plug in valve II (7) with plug in valve I (2) respectively by pipeline, on described plug in valve II (7), be connected with pilot valve (9), pilot valve (9) is connected with relief valve II (10) with relief valve I (8) respectively, the pipeline that plug in valve I (2) is connected with oil cylinder (6) is provided with pressure gauge (3), and oil cylinder (6) is connected by pipeline with topping up case (4).
2. a kind of pressure-releasing device for hydraulic-machine system according to claim 1, is characterized in that, described oil cylinder (6) comprises cylinder upper cavity oil and oil cylinder cavity of resorption.
3. a kind of pressure-releasing device for hydraulic-machine system according to claim 1 and 2, is characterized in that, also comprises liquid-filling valve (5), and described liquid-filling valve (5) is arranged on the pipeline between oil cylinder (6) and topping up case (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420255981.XU CN203962571U (en) | 2014-05-19 | 2014-05-19 | A kind of pressure-releasing device for hydraulic-machine system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420255981.XU CN203962571U (en) | 2014-05-19 | 2014-05-19 | A kind of pressure-releasing device for hydraulic-machine system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203962571U true CN203962571U (en) | 2014-11-26 |
Family
ID=51923163
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420255981.XU Expired - Fee Related CN203962571U (en) | 2014-05-19 | 2014-05-19 | A kind of pressure-releasing device for hydraulic-machine system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203962571U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018090352A1 (en) * | 2016-11-20 | 2018-05-24 | 陈良娟 | Pressure relief device for hydraulic machine |
| CN108895235A (en) * | 2018-09-20 | 2018-11-27 | 新日域(湖南)机电制造有限公司 | A kind of safety return-flow device |
-
2014
- 2014-05-19 CN CN201420255981.XU patent/CN203962571U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018090352A1 (en) * | 2016-11-20 | 2018-05-24 | 陈良娟 | Pressure relief device for hydraulic machine |
| CN108895235A (en) * | 2018-09-20 | 2018-11-27 | 新日域(湖南)机电制造有限公司 | A kind of safety return-flow device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN205047554U (en) | Lift platform and hydraulic system thereof | |
| CN204357813U (en) | A kind of novel four-roller crusher hydraulic station | |
| CN203962571U (en) | A kind of pressure-releasing device for hydraulic-machine system | |
| CN202062696U (en) | Pressure-releasing device for hydraulic-machine system | |
| CN203770246U (en) | Hydraulic system for auxiliary device of steel pipe removal tower | |
| CN203627345U (en) | Pressure maintaining circuit provided with energy accumulator | |
| CN203594717U (en) | Double-pump driven safety brake hydraulic control system | |
| CN202754726U (en) | Jacking hydraulic system of tower crane | |
| CN204187063U (en) | A kind of pressure safety valve | |
| CN204003676U (en) | Pressurized machine surges | |
| CN202378258U (en) | Hydraulic loop system of injection molding machine with power-off protection | |
| CN204386973U (en) | A kind of hydrovalve of oil return circuit band auto-lock function | |
| CN202451519U (en) | Efficient oil supply loop | |
| CN204099876U (en) | A kind of oil pump with safety protection device | |
| CN201377483Y (en) | Overpressure protection device for hydraulic cylinder | |
| CN102562716A (en) | High-efficiency oil supply loop | |
| CN205298107U (en) | Sector gate closed hydraulic drive system | |
| CN205315368U (en) | Hydraulic system of coal pulverizer | |
| CN204019057U (en) | Plug-in type steel pipe detaching device | |
| CN202864850U (en) | Automatic sliding down prevention device for forklift | |
| CN204278597U (en) | A kind of hydraulic system of press of abrasive cut-off wheel shaping machine set | |
| CN204164072U (en) | A kind of hydraulic control valve on gyratory crusher | |
| CN204000798U (en) | Improve the arrangement of pumped storage power plant tail water pipe import minimum pressure | |
| CN201696381U (en) | Hydraulic device with pressure-maintaining hydraulic fluid supplementing function | |
| CN202733076U (en) | Torsion monitoring and electronic pressure-regulating device for hydraulic tong |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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: 20141126 Termination date: 20150519 |
|
| EXPY | Termination of patent right or utility model |