CN2495856Y - Water-proof mechanism for hydraulic rod of hydraulic cylinder - Google Patents
Water-proof mechanism for hydraulic rod of hydraulic cylinder Download PDFInfo
- Publication number
- CN2495856Y CN2495856Y CN 01249547 CN01249547U CN2495856Y CN 2495856 Y CN2495856 Y CN 2495856Y CN 01249547 CN01249547 CN 01249547 CN 01249547 U CN01249547 U CN 01249547U CN 2495856 Y CN2495856 Y CN 2495856Y
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- CN
- China
- Prior art keywords
- water
- ring
- piston rod
- hydraulic
- end communicated
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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 - Lifetime
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Abstract
The utility model discloses a waterproof mechanism for hydraulic rod of hydraulic cylinder. Another dustproof ring is arranged beside the former dustproof ring, a block ring is arranged between the two dustproof rings, and a hollow cavity is formed between the block ring and the piston rod; a ventilation channel is positioned above the pressing cover, with one end communicated with air and the other end communicated with the hollow cavity; moreover, a drainage channel is arranged below the pressing cover, with one end communicated with air and the other end communicated with the hollow cavity. Water which is scratched off by the secondary dustproof quickly flows out of the drainage channel below. The ventilation channel above supplements air so as to make the water below be discharged quickly. The mechanism can effectively promise that water will no immerge into the hydraulic cylinder and thus effectively protects the hydraulic oil as well having advantages of simple structure, convenient mounting and low cost.
Description
Technical field:
The utility model relates to a kind of hydraulic jack, particularly relates to a kind of water-tight device of hydraulic cylinder piston rod.
Background technique:
In concrete pump and some other engineering goods, its oil cylinder piston bar is under water, when piston rod bounces back, easily water is brought in the hydraulic oil.At present the oil cylinder piston rod seal structure that adopts is made up of three parts, and two inside Sealings of lip are used for oil sealing, and a dust ring is used for preventing the intrusion of environmental contaminants.Because piston rod surface is rough from microcosmic, generally all the specific surface pit is big for solid particle, when piston rod bounces back, just scraped by the lip limit of dust ring and stay the outside, but for water, part water is because of in pit, dust ring can not all scrape water, so just there is most of water to bring in the oil cylinder.The every action of oil cylinder is once brought a little into, and the frequent movement accumulation is brought a large amount of water into, causes the hydraulic oil emulsion deterioration.
Summary of the invention:
Technical problem to be solved in the utility model provides a kind ofly can prevent effectively that sealing brings the water-tight device of oil cylinder and hydraulic cylinder piston rod simple in structure into.
The technical solution adopted in the utility model is: original dust ring corresponding with piston rod is other on gland adds a dust ring again, is provided with a back-up ring between two dust rings, forms a cavity between back-up ring and the piston rod; Be provided with air vent above gland, air vent one end communicates with atmosphere, and the other end communicates with cavity; Be provided with discharge channel below gland, discharge channel one end communicates with atmosphere, and the other end communicates with cavity.
Owing to adopted technique scheme, through first dust ring scrape squeeze after, piston rod surface is only residual seldom part water, crowded through scraping of the second road dust ring again, piston rod surface just no longer includes water substantially.Scraped the water forcing down flows out rapidly through the discharge channel of below by the second road dust ring; The air vent of top is mended into air, and the water of below can be discharged rapidly.Like this, can not invade hydraulic jack, effectively protected hydraulic oil, and this apparatus structure be simple with regard to effectively having guaranteed water, easy for installation, cheap.
Description of drawings:
Fig. 1 is a structural representation of the present utility model;
Fig. 2 is an A place enlarged view among Fig. 1.
Embodiment:
Referring to Fig. 1 and Fig. 2, add a dust ring 4 again in that the corresponding original dust ring of gland 1 and piston rod 23 is other, between two dust rings, be provided with a back-up ring 5, cavity 7 of formation between back-up ring 5 and the piston rod 2; Be provided with air vent 6 above gland 1, air vent 6 one ends communicate with atmosphere, and the other end communicates with cavity 7; Be provided with discharge channel 8 below gland 1, discharge channel 8 one ends communicate with atmosphere, and the other end communicates with cavity 7.
Through first dust ring 3 scrape squeeze after, piston rod 2 surfaces are only residual seldom part water, crowded through scraping of the second road dust ring 4 again, piston rod 2 surfaces just no longer include water substantially.Scraped the water forcing down flows out rapidly through the discharge channel 8 of below by the second road dust ring 4.The air vent 6 of top mends air, and the water of below is discharged rapidly.Like this, can not invade hydraulic jack, effectively protect hydraulic oil with regard to effectively having guaranteed water.
Claims (1)
- A kind of water-tight device of hydraulic cylinder piston rod, comprise gland (1), piston rod (2) and be contained in dust ring (3) on the described gland (1), it is characterized in that: on described gland (1), be provided with a dust ring (4), be provided with back-up ring (5) between described dust ring (4) and the described dust ring (3), be formed with cavity (7) between described back-up ring (5) and the described piston rod (2); Be provided with air vent (6) in described gland (1) top, described air vent (6) one ends communicate with atmosphere, and the other end communicates with described cavity (7); Be provided with discharge channel (8) in described gland (1) below, described discharge channel (8) one ends communicate with atmosphere, and the other end communicates with described cavity (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01249547 CN2495856Y (en) | 2001-08-23 | 2001-08-23 | Water-proof mechanism for hydraulic rod of hydraulic cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01249547 CN2495856Y (en) | 2001-08-23 | 2001-08-23 | Water-proof mechanism for hydraulic rod of hydraulic cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2495856Y true CN2495856Y (en) | 2002-06-19 |
Family
ID=33659911
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01249547 Expired - Lifetime CN2495856Y (en) | 2001-08-23 | 2001-08-23 | Water-proof mechanism for hydraulic rod of hydraulic cylinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2495856Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102032169A (en) * | 2010-12-16 | 2011-04-27 | 西安昆仑工业（集团）有限责任公司 | Drainage preventing device of main oil cylinder of concrete trailer pump |
| CN103452953A (en) * | 2013-09-05 | 2013-12-18 | 中联重科股份有限公司 | Hydraulic oil cylinder, waterproof system thereof and concrete pumping device |
| CN105673855A (en) * | 2015-11-28 | 2016-06-15 | 江门市格雷亚特流体密封技术有限公司 | SYD type dust ring |
| WO2022068291A1 (en) * | 2020-09-30 | 2022-04-07 | 三一汽车制造有限公司 | Water resistance apparatus, pumping system, pumping machine, and cleaning method |
-
2001
- 2001-08-23 CN CN 01249547 patent/CN2495856Y/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102032169A (en) * | 2010-12-16 | 2011-04-27 | 西安昆仑工业（集团）有限责任公司 | Drainage preventing device of main oil cylinder of concrete trailer pump |
| CN102032169B (en) * | 2010-12-16 | 2013-04-24 | 西安昆仑工业（集团）有限责任公司 | Drainage preventing device of main oil cylinder of concrete trailer pump |
| CN103452953A (en) * | 2013-09-05 | 2013-12-18 | 中联重科股份有限公司 | Hydraulic oil cylinder, waterproof system thereof and concrete pumping device |
| CN105673855A (en) * | 2015-11-28 | 2016-06-15 | 江门市格雷亚特流体密封技术有限公司 | SYD type dust ring |
| WO2022068291A1 (en) * | 2020-09-30 | 2022-04-07 | 三一汽车制造有限公司 | Water resistance apparatus, pumping system, pumping machine, and cleaning method |
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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 | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20110823 Granted publication date: 20020619 |