CN201047367Y - Steel tube diameter enlarging machine duplex combined oil cylinder - Google Patents
Steel tube diameter enlarging machine duplex combined oil cylinder Download PDFInfo
- Publication number
- CN201047367Y CN201047367Y CNU2007200319686U CN200720031968U CN201047367Y CN 201047367 Y CN201047367 Y CN 201047367Y CN U2007200319686 U CNU2007200319686 U CN U2007200319686U CN 200720031968 U CN200720031968 U CN 200720031968U CN 201047367 Y CN201047367 Y CN 201047367Y
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Abstract
The utility model provides a dual-linking combined hydraulic cylinder of a steel pipe expansion machine, comprising a main hydraulic cylinder and a main oil pump. The main hydraulic cylinder is provided with a main oil pump port. The utility model is characterized in that the main hydraulic cylinder is designed into a dual-rod and dual-function hydraulic cylinder; a rear cylinder cover of the main hydraulic cylinder is provided with a small hydraulic cylinder; a piston of the small hydraulic cylinder is arranged on an extension rod at the rear side of the main hydraulic cylinder, thus leading the main hydraulic cylinder to be connected in series with the piston of the small hydraulic cylinder; a liquid filling port is respectively arranged above a front cylinder cover and the rear cylinder cover of the main hydraulic cylinder and the liquid filling port is provided with a liquid filling valve used for filling the hydraulic oil into a front oil chamber and a rear oil chamber when the piston of the main hydraulic cylinder moves in an empty stroke. The combined hydraulic cylinder can lead the front oil chamber and the rear oil chamber to adopt a self-suction type to obtain the oil in the empty stroke. The dual-link combined hydraulic cylinder only pumps the oil and pressurizes in the front oil chamber from the main oil pump when the diameter is expanded, thus improving the stroke speed in an empty load of the piston and prolonging the service life of the main oil pump.
Description
Technical field
The utility model relates to a kind of oil cylinder, relates in particular to a kind of duplex combined type oil cylinder that is used for steel tube expansion.
Background technique
On heavy caliber longitudinal submerged arc welded pipe production line, the master cylinder of external steel tube expansion all adopts single rod, two-way cylinder, so-called single rod, double-action are meant that a side of oil cylinder has piston rod to derive, and opposite side then seals, and promptly this oil cylinder can be divided into rod chamber and rodless cavity.The oil-feed of rod chamber (preceding oil pocket) and rodless cavity (back oil pocket) is all by main oil pump pump oil in a hole enlargement circulation, and the main oil pump operating time is long, and lost motion speed is slow, causes main oil pump shortening in working life.
Summary of the invention
The purpose of this utility model is to provide a kind of preceding oil pocket of oil cylinder and back oil pocket of can making under the idle stroke situation, all adopt the oil-feed of self-priming mode, only when hole enlargement just by the main oil pump duplex combined type oil cylinder of pump oil pressurization in the oil pocket forward, travel speed during with the zero load of raising piston, the working life of prolongation main oil pump.
For achieving the above object, the technological scheme taked of the utility model is:
A kind of steel tube expansion duplex combined type oil cylinder, comprise master cylinder and main oil pump, master cylinder is provided with main oil pump pump hydraulic fluid port, it is characterized in that: described master cylinder is designed to two rods, (so-called two rods, two-way cylinder are meant that the oil cylinder both sides all have piston rod to derive to two-way cylinder, the branch that does not promptly have rodless cavity, rod chamber), a small oil tank is installed on the master cylinder back cylinder cover, the piston of small oil tank is installed on the master cylinder rear side extension bar, makes to constitute " series connection " between the piston of master cylinder and small oil tank; Above the forward and backward cylinder cap of master cylinder, respectively be provided with an implementation of port, a liquid-filling valve is installed on each implementation of port, be used for when the main oil cylinder piston idle stroke moves, in its forward and backward oil pocket, charge into hydraulic oil.
Described main oil pump pump hydraulic fluid port is located at a side of each implementation of port.
By adopting above-mentioned duplex combined type oil cylinder scheme, when main oil cylinder piston is done the idle stroke action, the forward and backward oil pocket of small oil tank is by little oil pump pump oil, small oil tank drives main oil cylinder piston and does forward and backward fast moving, at this moment the forward and backward oil pocket of master cylinder all by liquid-filling valve " self-priming " oil-feed, do not work by main oil pump.When entering working stroke, the master cylinder liquid-filling valve cuts out, master cylinder, small oil tank all by separately oil pump to its preceding oil pocket pump oil, oil pocket boosts and drives piston integral body and move at a slow speed backward before the master cylinder, finishes the pipe expanding action.This just makes gave master cylinder pump oil condition by main oil pump originally under unloaded and load condition, change into when idle stroke and only give small oil tank pump oil by a little oil pump, just gave master cylinder pump oil by main oil pump when only entering working stroke.For this reason, the utlity model has following remarkable result:
1. reduced the time of main oil pump, can prolong the working life of main oil pump to the big discharge capacity of the forward and backward oil pocket of master cylinder, long-time pump oil;
2. drive main oil cylinder piston with little oil pump and move as idle stroke, charge into hydraulic oil for master cylinder front and back oil pocket in the self-priming mode, the main oil cylinder piston travelling speed is accelerated, and has reduced the Oil pump electrical machinery energy consumption, has improved working efficiency.
Description of drawings
Fig. 1 is the utility model embodiment's a structural representation.
Among the figure: the 1-master cylinder; The 2-small oil tank; 3-small oil tank piston; 4-master cylinder rear side extension bar; 5-master cylinder front end housing; 6-master cylinder back cylinder cover; The big latus rectum liquid-filling valve of 7-; The 8-main oil cylinder piston; 9-main oil pump pump hydraulic fluid port; Oil pocket before the 10-master cylinder; Oil pocket behind the 11-master cylinder; Oil pocket before the 12-small oil tank; Oil pocket behind the 13-small oil tank.
Embodiment
As shown in Figure 1, master cylinder 1 is designed to two rods, two-way cylinder, a small oil tank 2 is installed on master cylinder back cylinder cover 6, small oil tank piston 3 is installed on the rear side extension bar 4 of master cylinder 1, makes between the piston of master cylinder 1, small oil tank 2 to constitute " series connection ".Above master cylinder front end housing 5, back cylinder cover 6, respectively be provided with an implementation of port, a big latus rectum liquid-filling valve 7 is installed on each implementation of port, be used for when main oil cylinder piston 8 idle strokes move forward and backward, in forward and backward oil pocket, charging into hydraulic oil.Side in each implementation of port of master cylinder 1 still keeps main oil pump pump hydraulic fluid port 9, is used for when working stroke by main oil pump pump oil in the oil pocket 10 before master cylinder.
Working procedure of the present utility model is: earlier by little oil pump pump oil in the oil pocket 12 before small oil tank, small oil tank piston 3 drives main oil cylinder piston 8 and does fast to move after the idle stroke, by the self-priming oil-feed, the back oil pocket 13 of oil pocket 11, small oil tank is all to the fuel tank oil extraction behind the master cylinder by liquid-filling valve 7 for the preceding oil pocket 10 of master cylinder this moment; After entering working stroke, the liquid-filling valve 7 of oil pocket 10 cuts out before the master cylinder, main oil pump, little oil pump be pump oil in the oil pocket 12 before oil pocket 10, the small oil tank before master cylinder simultaneously, main oil cylinder piston 8, small oil tank piston 3 move at a slow speed backward, the pulling piston rod carries out hole enlargement to steel pipe, behind this moment master cylinder behind oil pocket 11 and the small oil tank oil pocket 13 all to the fuel tank oil extraction, reach the hole enlargement path increment after, main oil cylinder piston 8, small oil tank piston 3 stop, and working stroke finishes.
After working stroke finishes, hydraulic system is made switching, change by little oil pump pump oil in the oil pocket 13 behind small oil tank, small oil tank piston 3 drives main oil cylinder piston 8 and does the idle stroke reach fast, oil pocket 11 leans on the self-priming oil-feed by liquid-filling valve 7 behind the master cylinder at this moment, oil pocket 10, the preceding oil pocket 12 of small oil tank are all to the fuel tank oil extraction, until the preceding stop position that reaches regulation before the master cylinder.So far, a hole enlargement work cycle is finished.
Back segment in hole enlargement process and answer initial position process for preventing to produce bigger impact, utilizes back pressure to cushion, and makes the oil that will discharge oil pocket through very little gap, makes that so just piston action is slack-off, plays buffer function.
Claims (2)
1. steel tube expansion duplex combined type hydraulic cylinder, comprise master hydraulic cylinder and main oil pump, master hydraulic cylinder is provided with main oil pump pump hydraulic fluid port, it is characterized in that: described master cylinder design becomes two rods, double-acting hydraulic cylinder, a small cylinder is installed on the master hydraulic cylinder back cylinder cover, the piston of small cylinder is installed on the master hydraulic cylinder rear side extension bar, makes between the piston of master hydraulic cylinder and small cylinder to connect; Above the forward and backward cylinder cap of master hydraulic cylinder, respectively be provided with an implementation of port, a liquid-filling valve is installed on each implementation of port.
2. duplex combined type hydraulic cylinder according to claim 1 is characterized in that: described main oil pump pump hydraulic fluid port is located at a side of each implementation of port.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200319686U CN201047367Y (en) | 2007-05-23 | 2007-05-23 | Steel tube diameter enlarging machine duplex combined oil cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200319686U CN201047367Y (en) | 2007-05-23 | 2007-05-23 | Steel tube diameter enlarging machine duplex combined oil cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201047367Y true CN201047367Y (en) | 2008-04-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200319686U Expired - Fee Related CN201047367Y (en) | 2007-05-23 | 2007-05-23 | Steel tube diameter enlarging machine duplex combined oil cylinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201047367Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102962724A (en) * | 2012-10-24 | 2013-03-13 | 荣成锻压机床有限公司 | Gear stabilizing device of vertical vehicle gearbox |
| CN104454803A (en) * | 2014-10-30 | 2015-03-25 | 西安交通大学 | Mechanical and hydraulic composite energy-saving cylinder for long idle stroke and short pressure stroke |
| CN107605850A (en) * | 2017-09-14 | 2018-01-19 | 郑州大学 | A kind of novel double-row journey oil cylinder |
| CN110273892A (en) * | 2019-06-21 | 2019-09-24 | 三峡大学 | A kind of multi-chamber hydraulic cylinder for the acquisition of wave energy wideband |
| CN112412900A (en) * | 2020-11-10 | 2021-02-26 | 太原重工股份有限公司 | Main oil cylinder equipment for expanding machine |
-
2007
- 2007-05-23 CN CNU2007200319686U patent/CN201047367Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102962724A (en) * | 2012-10-24 | 2013-03-13 | 荣成锻压机床有限公司 | Gear stabilizing device of vertical vehicle gearbox |
| CN104454803A (en) * | 2014-10-30 | 2015-03-25 | 西安交通大学 | Mechanical and hydraulic composite energy-saving cylinder for long idle stroke and short pressure stroke |
| CN107605850A (en) * | 2017-09-14 | 2018-01-19 | 郑州大学 | A kind of novel double-row journey oil cylinder |
| CN110273892A (en) * | 2019-06-21 | 2019-09-24 | 三峡大学 | A kind of multi-chamber hydraulic cylinder for the acquisition of wave energy wideband |
| CN112412900A (en) * | 2020-11-10 | 2021-02-26 | 太原重工股份有限公司 | Main oil cylinder equipment for expanding machine |
| CN112412900B (en) * | 2020-11-10 | 2022-08-02 | 太原重工股份有限公司 | Main oil cylinder equipment for expanding machine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080416 Termination date: 20110523 |