CN2725600Y - Jacking oil cylinder - Google Patents
Jacking oil cylinder Download PDFInfo
- Publication number
- CN2725600Y CN2725600Y CN 200420061472 CN200420061472U CN2725600Y CN 2725600 Y CN2725600 Y CN 2725600Y CN 200420061472 CN200420061472 CN 200420061472 CN 200420061472 U CN200420061472 U CN 200420061472U CN 2725600 Y CN2725600 Y CN 2725600Y
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- CN
- China
- Prior art keywords
- valve
- valve body
- oil
- cylinder
- oilhole
- 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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Abstract
The utility model which belongs to the hydraulic device discloses a jacking oil cylinder of tower crane, and the utility model aims to provide a jacking oil cylinder with integral balanced valve, comprising a balanced valve, an oil cylinder, and a plunger. The balanced valve is composed of a valve body, a push rod, a large valve, a small valve, a spring, a spring base and an end cap; the small valve and the spring base are installed in the large valve; a spring of the small valve is installed between the spring base and the small valve; the large valve is installed in the valve body; the end cap is fixed on the valve body; a push rod is fixed on the bottom of the valve body; a spring of the large valve is installed between the end cap and the large valve; the valve body is fixedly installed in the cylinder bottom; the oil hole is connected with the cavity with no rod of the oil cylinder through the large valve, oil hole, and oil channel; the oil hole is connected with the cavity with no rod of the oil cylinder through the oil groove and the oil channel; the oil inlet is connected with the oil hole; the other oil inlet is connected with the cavity with rod of the oil cylinder through a control oil channel. The utility model mainly applies to the engineering machinery such as tower crane.
Description
Technical field: the utility model relates to a kind of hydraulic pressure installation, relates in particular to a kind of jacking cylinder that is used for the band equilibrium valve device of tower crane.
Background technique: at present, domesticly have the equilibrium valve device of forming by two Pilot operated check valves mostly for the supporting jacking cylinder of tower crane, therefore be characterized in: two Pilot operated check valves are separate type, and traditional equilibrium valve device has that structure is not compact, installation and maintenance are inconvenient and shortcoming such as processing difficulties.
Summary of the invention: in order to overcome the deficiencies in the prior art, the integrated type equilibrium valve jacking cylinder that the utility model aims to provide a kind of compact structure, installation and maintenance are convenient, cost is low, be convenient to process.
The technical solution of the utility model comprises cylinder bottom that equilibrium valve is housed, with the fixedly connected cylinder sleeve of cylinder bottom and be installed in the piston that is connected with piston rod in the cylinder sleeve; Described equilibrium valve is made up of valve body, push rod, big little moveable door, big or small shutter spring, spring seat and end cap; The little moveable door that is provided with oil groove is installed in the big valve with the spring seat that is provided with oilhole, and the little moveable door spring is installed between spring seat and little moveable door; The bottom is provided with the top that big valve is installed in the valve body versatilely, end cap is fixed on valve body of hydraulic fluid port, push rod is installed in the bottom of this valve body, is big shutter spring between big valve and end cap, and hydraulic fluid port is airtight by the bottom of little moveable door; Valve body is fixedly mounted in the cylinder bottom, oilhole on the valve body is communicated with the rodless cavity of oil cylinder by oilhole, the oil duct on the cylinder bottom on big valve, this valve body, and oilhole is communicated with the rodless cavity of oil cylinder by oilhole, the oilhole on the valve body, the oil duct on little moveable door, the spring seat: the filler opening on the cylinder bottom is communicated with oilhole, another filler opening is communicated with the rod chamber of oil cylinder by the control oil duct.
Be provided with screw press on end cap, described oilhole is to be staggered about preface with the size; On valve body, be provided with the vent hole that is communicated with oilhole, steel ball and bleed screw are housed in the hole.
Compared with the prior art, the utility model is owing to change traditional separated type equilibrium valve into the integrated type equilibrium valve, thereby reduced the size of jacking cylinder widely, made structure compact more: simultaneously, installation and maintenance are more convenient, processing is more prone to, has reduced product cost.
Description of drawings:
Fig. 1 is a structural representation of the present utility model;
Fig. 2 is the A-A sectional view among Fig. 1;
Fig. 3 is the structural representation of the utility model equilibrium valve assembly;
Fig. 4 is a hydraulic schematic diagram of the present utility model.
Among the figure: big shutter spring 1 valve body 2 cylinder bottoms 3 nuts 4 screw press 5 safety covers 6 end caps 7 oilholes 8,15,18,23 oil ducts 9 jump rings 10 straight pins 11 pistons 12 piston rods 13 cylinder sleeves 14 little moveable door springs 16 control oil ducts 17 little moveable doors 19 push rods 20 filler openings 21 vent holes 22 big valve 24 spring seats 25 filler openings 26 oil grooves 27 hydraulic fluid ports 28
Embodiment: the utility model is described in further detail below in conjunction with accompanying drawing and specific embodiment:
In Fig. 1～4, the valve body 2 which is provided with oilhole 15,18,23 is fixed in the cylinder bottom 3 by screw thread, the bottom is housed in valve body 2 has the big valve 24 and the big shutter spring 1 of hydraulic fluid port 28, end cap 7 is fixed on the port of valve body 2 by screw thread, and mobilizable push rod 20 is installed in the bottom in valve body 2.End cap 7 compresses big valve 24 by big shutter spring 1, and screw press 5 is installed on the end cap 7 by screw thread, and by nut 4 lockings.Install in the big valve 24 and have little moveable door 19, the little moveable door spring 16 of oil groove 27 and the spring seat 25 that has oilhole 8.Rotate screw press 5 and can change the pressure of little moveable door spring 16 and the fluid flow of the oilhole 8 of flowing through.Oilhole 23 is communicated with filler opening 26 by the oil duct 9 of big valve 24, oilhole 18 and cylinder bottom 3 on the one hand with the rodless cavity of oil cylinder, by little moveable door 19, oilhole 8, oilhole 15 and the oil duct 9 that has oil groove 27 filler opening 26 is communicated with the rodless cavity of oil cylinder on the other hand; Another filler opening 21 on the cylinder bottom 3 is communicated with the rod chamber of oil cylinder by control oil duct 17.In order to regulate the pressure of control oil, it is the staggered oilhole 8 in the preface left and right sides with the size that spring seat 25 is provided with a plurality of; On valve body 2, also be provided with the vent hole 22 that is communicated with oilhole 23, steel ball and bleed screw are housed in the hole.The piston 12 that is installed in the cylinder sleeve 14 is fixedly connected by straight pin 11 and piston rod 13, and straight pin 11 is locked by jump ring 10.In addition, for safety, attractive in appearance for the purpose of, a safety cover 6 also can be installed on end cap 7.
Claims (3)
1. jacking cylinder comprises cylinder bottom that equilibrium valve is housed, with the fixedly connected cylinder sleeve of cylinder bottom and be installed in the piston that is connected with piston rod in the cylinder sleeve; Described equilibrium valve is made up of valve body, push rod, big little moveable door, big or small shutter spring, spring seat and end cap; It is characterized in that: the spring seat (25) that is provided with the little moveable door (19) of oil groove (27) and is provided with oilhole (8) is installed in the big valve (24), and little moveable door spring (16) is installed between spring seat (25) and little moveable door (19); The bottom is provided with the top that big valve (24) is installed in the valve body (2) versatilely, end cap (7) is fixed on valve body (2) of hydraulic fluid port (28), push rod (20) is installed in the bottom of this valve body, between big valve (24) and end cap (7) is big shutter spring (1), and hydraulic fluid port (28) is airtight by the bottom of little moveable door (19); Valve body (2) is fixedly mounted in the cylinder bottom (3), oilhole (23) on the valve body (2) is communicated with the rodless cavity of oil cylinder by the oilhole (18) on the big valve (24), this valve body, the oil duct (9) on the cylinder bottom (3), and oilhole (15), oil duct (9) that oilhole (23) passes through on the oil groove (27), oilhole (8), valve body (2) of little moveable door (19) are communicated with the rodless cavity of oil cylinder; Filler opening (26) on the cylinder bottom (3) is communicated with oilhole (23), another filler opening (21) is communicated with the rod chamber of oil cylinder by control oil duct (17).
2. jacking cylinder according to claim 1 is characterized in that: be provided with screw press (5) on end cap (7), described oilhole (8) is to be staggered about preface with the size.
3. jacking cylinder according to claim 1 and 2 is characterized in that: be provided with the vent hole (22) that is communicated with oilhole (23) on valve body (2), steel ball and bleed screw are housed in the hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420061472 CN2725600Y (en) | 2004-09-23 | 2004-09-23 | Jacking oil cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420061472 CN2725600Y (en) | 2004-09-23 | 2004-09-23 | Jacking oil cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2725600Y true CN2725600Y (en) | 2005-09-14 |
Family
ID=35040319
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420061472 Expired - Fee Related CN2725600Y (en) | 2004-09-23 | 2004-09-23 | Jacking oil cylinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2725600Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103008965A (en) * | 2012-11-28 | 2013-04-03 | 泰兴市第一建筑安装工程有限公司 | Maintenance method for hydraulic jacking oil cylinder of tower crane |
| CN105129608A (en) * | 2015-06-12 | 2015-12-09 | 焦作大学 | Container crane heightening device |
| CN108374813A (en) * | 2018-03-29 | 2018-08-07 | 宁波长昇流体技术有限公司 | A kind of self-locking oil cylinder |
| CN112443534A (en) * | 2020-12-10 | 2021-03-05 | 徐州徐工液压件有限公司 | Cylinder valve integrated type standardized heavy-load lifting oil cylinder structure |
-
2004
- 2004-09-23 CN CN 200420061472 patent/CN2725600Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103008965A (en) * | 2012-11-28 | 2013-04-03 | 泰兴市第一建筑安装工程有限公司 | Maintenance method for hydraulic jacking oil cylinder of tower crane |
| CN105129608A (en) * | 2015-06-12 | 2015-12-09 | 焦作大学 | Container crane heightening device |
| CN108374813A (en) * | 2018-03-29 | 2018-08-07 | 宁波长昇流体技术有限公司 | A kind of self-locking oil cylinder |
| CN112443534A (en) * | 2020-12-10 | 2021-03-05 | 徐州徐工液压件有限公司 | Cylinder valve integrated type standardized heavy-load lifting oil cylinder structure |
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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: 20050914 Termination date: 20091023 |