CN2185342Y - Differential hydraulic device in oil tank - Google Patents
Differential hydraulic device in oil tank Download PDFInfo
- Publication number
- CN2185342Y CN2185342Y CN 92246043 CN92246043U CN2185342Y CN 2185342 Y CN2185342 Y CN 2185342Y CN 92246043 CN92246043 CN 92246043 CN 92246043 U CN92246043 U CN 92246043U CN 2185342 Y CN2185342 Y CN 2185342Y
- Authority
- CN
- China
- Prior art keywords
- oil
- piston
- spool
- oil tank
- piston rod
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- 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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Abstract
The utility model belongs to the pressure control devices of hydraulic systems, which is particularly an inner differential device used for controlling the flowing sequence of hydraulic oil in an oil tank. A piston with a radial direction sealing ring is arranged in the oil tank, the oil tank is split into an upper cavity and a lower cavity, and an oil path passage is arranged between a valve cap and the piston. A central equilibrium oil hole of a valve core is communicated with a central oil drain hole of a piston rod, when nominal pressure oil goes into an oil cylinder (1), pushes the valve core (4), and opens a valve port, the upper cavity and the lower cavity of the oil tank are communicated, and the inner differential is realized. The utility model has advantages of simple structure, and rapid oil draining, and the inner differential device ensures that percussion frequency reaches from 30 to 60 times / minute.
Description
The utility model belongs to the pressure control device of hydraulic system, particularly a kind of internal differential hydraulic pressure device that is used to control the mobile order of hydraulic oil in the oil cylinder.
The frequency of impact of hydraulic pile hammer is the major technology performance, and frequency of impact directly influences piling working efficiency and use.Manufacturing enterprise all is devoted to the structural research and the improvement of hydraulic pile hammer both at home and abroad, but make little progress, the NH-40 type hydraulic pile hammer of producing as Japanese vehicle company, in order to solve quick oil extraction problem, the outer differential hydraulic system that has disposed that cone valve and solenoid valve combine, import the structure of the pilot pressure oil that has nothing to do with working connection from the outside, increased outer differential oil-way system resistance, influence reaction velocity.It is interior differential that the hydraulic pile hammer of Japan normal dish building Co., Ltd. and Britain BSP company adopts baroque double-layer hydraulic oil cylinder to realize, complex structure is bulky, gives and uses maintenance to bring difficulty.
The purpose of this utility model is to overcome above technical deficiency, and provides a kind of simple in structure, quick, high efficiency oil cylinder internal differential hydraulic pressure device.
The utility model oil cylinder internal differential hydraulic pressure device is to realize like this, the piston of radial direction seal ring is installed in cylinder tube, in cylinder barrel, slide, oil cylinder is divided into upper and lower two chambeies, valve gap and piston adopt scyewed joint, have asphalt channel between valve gap and the piston, spool is installed at middle part, valve gap lower end, there is step spool and upper end, piston seal place, there is balance oil hole in center spool portion, put pressure spring between spool and the piston rod, adopt scyewed joint between piston lower end and piston rod, the other end of piston rod connects pile monkey.
The pressure oil that is positioned at the oil cylinder epicoele pushes spool downwards from the valve gap asphalt channel, open differential oilhole, upper and lower two chambeies of oil cylinder are communicated, form differential oil line, communicate with the draining oilhole at spool and piston rod central part balance oil hole, the balance that keep-ups pressure, the switching of oil pressure difference and pressure spring control spool, thus improve the frequency of impact and the impact energy of pile monkey.
The hydraulic pile hammer that the internal differential hydraulic pressure device is made has simple in structurely, and fast the characteristics of oil extraction guarantee that frequency of impact reaches 30～60 times/minute, reach the practical technical performance that requires.
Specifically describe with by way of example below in conjunction with accompanying drawing.
Fig. 1 shows oil cylinder internal differential hydraulic pressure device structural drawing.
Among the figure, the 1-cylinder tube; The 2-piston; The 3-valve gap; The 4-spool; The 5-spring; The 6-piston rod; The differential oilhole of 7-; The 8-asphalt channel; The 9-balance oil hole; 10-draining hole
Oil cylinder internal differential hydraulic pressure device, piston (2) with radial direction seal ring is installed in cylinder tube (1), piston (2) slides in cylinder tube (1), cylinder tube (1) is divided into, following two chambeies, valve gap (3) adopts scyewed joint with piston (2), have asphalt channel (8) between valve gap (3) and the piston (2), spool (4) is installed at middle part, valve gap (3) lower end, spool (4) has step with piston (2) sealing part upper end, spool (4) central part has balance oil hole (9), put pressure spring (5) between spool (4) and the piston rod (6), adopt scyewed joint between piston (2) lower end and piston rod (6), the other end of piston rod (6) connects pile monkey.After hydraulic system is set up pressure, when piston is in the oil cylinder lower end, the selector valve commutation, beginning supplies pressure oil to cylinder tube (1) cavity of resorption, this moment, epicoele was in the oil return state, and spool (4) is close port under spring (5) effect, and cavity of resorption pressure oil will push away on the piston (2), the tup pull-up, and then finish piling preparatory work.
When implementing to hit, selector valve commutates, and rated pressure oil enters in the cylinder tube (1), pushing spool (4), thus valve port is opened, the upper and lower chamber of oil cylinder is communicated with, and is differential in realizing, hits under tup is quick.Hit moment, the selector valve commutation, to oil cylinder cavity of resorption fuel feeding, the oil cylinder epicoele is the oil return state.Oil cylinder working-pressure descends, and spool (4) lifts rapidly under spring action, close port, and then begin next circulation.
In oil cylinder internal differential hydraulic pressure device working procedure, pressure oil is infiltered in the spool chamber of valve gap (3) and piston (2) by the outer wall of spool (4), pressure oil imports in the oil return circuit of low pressure by the balance oil hole (9) at spool (4) center and the draining hole (10) at piston rod (6) center, make to be in low-pressure state in the spool chamber all the time, guarantee spool (4) proper functioning.
The utility model design science, simple in structure, use easy to maintenancely, make hydraulic pile hammer realize quick, high-frequency strike having bigger impact energy, a kind of oil cylinder internal differential hydraulic pressure device of practicality is provided for construction industry.
Claims (4)
1, a kind of oil cylinder internal differential hydraulic pressure device, piston (2) with radial direction seal ring is installed in cylinder tube (1), piston (2) slides in cylinder tube (1), cylinder tube (1) is divided into, following two chambeies, valve gap (3) adopts scyewed joint with piston (2), it is characterized in that having asphalt channel (8) between valve gap (3) and the piston (2), spool (4) is installed at middle part, valve gap (3) lower end, the balance oil hole (9) of spool (4) central part for connecting, put pressure spring (5) between spool (4) and the piston rod (6), adopt screw thread to connect in piston (2) lower end with piston rod (6).
2, internal differential hydraulic pressure device according to claim 1 is characterized in that the balance oil hole (9) of spool (4) and piston rod (6) central part communicates with draining hole (10), places pressure spring in the middle of spool (4) and the piston rod (6).
3, internal differential hydraulic pressure device according to claim 1 is characterized in that having on the piston (2) differential oilhole (7).
4,, it is characterized in that there is step spool (4) and piston (2) sealing part upper end according to the described internal differential hydraulic pressure device of claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92246043 CN2185342Y (en) | 1992-12-30 | 1992-12-30 | Differential hydraulic device in oil tank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92246043 CN2185342Y (en) | 1992-12-30 | 1992-12-30 | Differential hydraulic device in oil tank |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2185342Y true CN2185342Y (en) | 1994-12-14 |
Family
ID=33784782
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 92246043 Expired - Fee Related CN2185342Y (en) | 1992-12-30 | 1992-12-30 | Differential hydraulic device in oil tank |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2185342Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1055514C (en) * | 1995-07-07 | 2000-08-16 | 中南工业大学 | Propelling system for hydraulic jumbo |
| CN101709731B (en) * | 2009-12-15 | 2012-07-18 | 盐城市智成机械制造有限公司 | Self-sucking primary-secondary oil cylinders for embossing machine |
| CN102691690A (en) * | 2011-03-25 | 2012-09-26 | 纳夫诺因基兴阿奇森法布瑞克有限公司 | Shift cylinder, drive device, work machine as well as method for operating a work machine |
| CN104832113A (en) * | 2015-04-29 | 2015-08-12 | 西安威盛电子科技股份有限公司 | Self-adaptive down-hole hydraulic centering device and centering method thereof |
-
1992
- 1992-12-30 CN CN 92246043 patent/CN2185342Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1055514C (en) * | 1995-07-07 | 2000-08-16 | 中南工业大学 | Propelling system for hydraulic jumbo |
| CN101709731B (en) * | 2009-12-15 | 2012-07-18 | 盐城市智成机械制造有限公司 | Self-sucking primary-secondary oil cylinders for embossing machine |
| CN102691690A (en) * | 2011-03-25 | 2012-09-26 | 纳夫诺因基兴阿奇森法布瑞克有限公司 | Shift cylinder, drive device, work machine as well as method for operating a work machine |
| CN102691690B (en) * | 2011-03-25 | 2016-08-17 | 纳夫诺因基兴阿奇森法布瑞克有限公司 | Master cylinder, driving means, operation machine and the method running operation machine |
| CN104832113A (en) * | 2015-04-29 | 2015-08-12 | 西安威盛电子科技股份有限公司 | Self-adaptive down-hole hydraulic centering device and centering method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |