CN2876046Y - Bipiston hydraulic hoisting jack - Google Patents
Bipiston hydraulic hoisting jack Download PDFInfo
- Publication number
- CN2876046Y CN2876046Y CN 200620109284 CN200620109284U CN2876046Y CN 2876046 Y CN2876046 Y CN 2876046Y CN 200620109284 CN200620109284 CN 200620109284 CN 200620109284 U CN200620109284 U CN 200620109284U CN 2876046 Y CN2876046 Y CN 2876046Y
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- CN
- China
- Prior art keywords
- piston
- jack
- backing plate
- small
- big
- Prior art date
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- Expired - Fee Related
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- Excavating Of Shafts Or Tunnels (AREA)
Abstract
A dual-piston hydraulic jack is composed of a backing plate (1), a rear plug (2), a large piston (3), a small piston (4), a hydro-cylinder (5), a bed plate (6), a hoisting collar (7), a front plug (8), a backing plate (9), a ball backing plate (10), an oil line A and oil line B. The utility model adopts the dual-piston that is the two-piston structure, wherein, the large piston (3) is the outer piston which is enclosed with a small piston (4), the small piston (4) is the inner piston, the large piston (3) is provided with a limit step (11), a pore canal (12) is arranged on the inner wall of the large piston (3), the pore canal is communicated with the oil chamber (13) that is positioned between the hydro-cylinder (5) and the large piston (3) and the oil chamber (14) that is arranged between the large piston (3) and the small piston (4). The utility model has the advantages of that the piston stroke is doubled, the moving times of the jack is half reduced when in operation, which greatly improves the operation efficiency, obviously reduces the labor intensity and particularly satisfies the requirement of the special structure engineering construction that has small construction space but demands large jack piston stroke, the structure is simple, the design is reasonable and the application is convenient.
Description
Technical field
The utility model relates to a kind of hydraulic jack, relates in particular to a kind of hydraulic jack of dual-piston structure.
Background technology
At present, giving stress technique has been widely used in the structures such as different types of rridges structure, underground culvert pipe structure, worker China Democratic National Construction Association structure and hydroelectric project, give in the stress engineering at these, jack is one of topmost preparation of construction, and the performance of jack directly has influence on the operating efficiency and the reasonable in design degree of engineering.
The jack piston stroke ratio of prior art is less, and the distance that structure was advanced when lifted on each pushing tow or top is little, wants frequent mobile jack in the construction or increases cushion block, causes operating efficiency low, and labour intensity is big; And in some special structure construction occasions, little as construction space, lift under the big situation of required distance on pushing tow or top, and the jack of prior art just is difficult to be suitable for.In order to increase the stroke of jack, people propose the technical scheme of double-piston, as Chinese patent CN89208986.5 " double piston-rod hydraulic jack " and CN02206173.8 " double-piston hydraulic jack ", these two patents have its technological advance part, but being applied to has its deficiency on the engineering, uses retracing spring to reset as the preceding paragraph patent, and the elastic force of retracing spring can reduce hydrostatic drive power during application, influence the thrust of jack, consequent patent is not mentioned piston reset situation etc.
Summary of the invention
The purpose of this utility model is to provide that a kind of compact conformation, piston stroke are big, constructing operation hydraulic jack easily.Adopt double-piston, i.e. the structure of second piston increases the piston stroke of jack piston stroke ratio ordinary jack and is twice, in construction, reduce the mobile number of times of jack, improve the efficient of construction, reduce labour intensity, satisfy the needs of special construction engineering construction.
The technical solution of the utility model is as follows:
The utility model jack comprises backing plate, back plug, big piston, valve piston, oil cylinder, bed plate, hangs hoop, preceding plug, backing plate, ball-type backing plate and two oil circuit; It is the structure of second piston that the utility model adopts double-piston, big piston is an outer piston, be with a valve piston in it, valve piston is an inner carrier, limited step is arranged on the big piston, the big piston wall is built-in with the duct, and this duct is communicated with the oil pocket that forms between the oil pocket that forms between oil cylinder and the big piston and big piston and the valve piston.
Advantage of the present utility model is: 1, piston stroke has increased by one times, the mobile number of times of jack can reduce half when construction, improved operating efficiency widely, labour intensity obviously reduces, and it is little and require the needs of the big special construction engineering construction of jack piston stroke especially can to satisfy those construction spaces.2, simple in structure, reasonable in design.3, easy to use, operate the same with ordinary jack.
Description of drawings
Accompanying drawing 1 is the utility model structural representation.
The specific embodiment
Below in conjunction with the accompanying drawing and the specific embodiment the utility model is described in further detail.
The utility model hydraulic jack comprises backing plate 1, back plug 2, big piston 3, valve piston 4, oil cylinder 5, bed plate 6, hangs hoop 7, preceding plug 8, backing plate 9, ball-type backing plate 10 and oil circuit A, oil circuit B, be with valve piston 4 in the big piston 3, limited step 11 is arranged on the big piston 3, big piston 3 walls are built-in with duct 12, oil pocket 13 between duct 12 connection oil cylinders 5 and the big piston 3 and the oil pocket 14 between big piston 3 and the valve piston 4.When pipe culvert pushing tow or the act construction of works top, the rear end backing plate 1 of jack is supported on the fixture, give jack oil circuit A fuel feeding, big piston 3 drives backing plates 9 with valve piston 4 and advances with ball-type backing plate 10, realizes that the pushing tow of pipe culvert or works top lift, when big piston 3 moves to its limited step 11 terraces and contacts with the step of oil cylinder 5 at the oil nozzle place of oil circuit B, big piston 3 is out of service, improve the pressure of oil circuit A this moment, valve piston 4 continues operation, covers until the stroke of valve piston 4.During the jack backhaul, from oil circuit B fuel feeding, fluid arrives oil pocket 14 through the built-in duct 12 of big piston 3 walls again through the oil pocket 13 that oil cylinder 5 and big piston 3 form, and makes valve piston 4 and big piston 3 backhauls, finishes a complete course of action.When structure interface and jack are subjected to force direction to have a few degrees deviation, can obtain adjusting and compensation by backing plate 9 and ball-type backing plate 10, make jack stressed rationally.
Claims (1)
1, a kind of double-piston hydraulic jack, comprise backing plate (1), back plug (2), big piston (3), valve piston (4), oil cylinder (5), bed plate (6), hang hoop (7), preceding plug (8), backing plate (9), ball-type backing plate (10) and oil circuit A, oil circuit B, it is characterized in that being with in the big piston (3) valve piston (4), limited step (11) is arranged on the big piston (3), big piston (3) wall is built-in with duct (12), oil pocket (13) between duct (12) connection oil cylinder (5) and the big piston (3) and the oil pocket (14) between big piston (3) and the valve piston (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620109284 CN2876046Y (en) | 2006-03-13 | 2006-03-13 | Bipiston hydraulic hoisting jack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620109284 CN2876046Y (en) | 2006-03-13 | 2006-03-13 | Bipiston hydraulic hoisting jack |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2876046Y true CN2876046Y (en) | 2007-03-07 |
Family
ID=37819286
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620109284 Expired - Fee Related CN2876046Y (en) | 2006-03-13 | 2006-03-13 | Bipiston hydraulic hoisting jack |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2876046Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102602841A (en) * | 2011-11-02 | 2012-07-25 | 襄阳中铁宏吉工程技术有限公司 | General type double-acting penetrating multi-stage piston tensioning jack for prestressing bridge |
| CN101776106B (en) * | 2010-01-19 | 2012-10-17 | 上海建工（集团）总公司 | Steel support shaft stress adaptive system real-time compensating hydraulic oil cylinder for base pit |
| CN114876935A (en) * | 2022-04-27 | 2022-08-09 | 中国舰船研究设计中心 | Internal and external balance type hydraulic nut for mounting ship propeller and mounting method thereof |
-
2006
- 2006-03-13 CN CN 200620109284 patent/CN2876046Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101776106B (en) * | 2010-01-19 | 2012-10-17 | 上海建工（集团）总公司 | Steel support shaft stress adaptive system real-time compensating hydraulic oil cylinder for base pit |
| CN102602841A (en) * | 2011-11-02 | 2012-07-25 | 襄阳中铁宏吉工程技术有限公司 | General type double-acting penetrating multi-stage piston tensioning jack for prestressing bridge |
| CN114876935A (en) * | 2022-04-27 | 2022-08-09 | 中国舰船研究设计中心 | Internal and external balance type hydraulic nut for mounting ship propeller and mounting method thereof |
| CN114876935B (en) * | 2022-04-27 | 2024-04-26 | 中国舰船研究设计中心 | Internal and external balance type hydraulic nut for installing ship propeller and installation method thereof |
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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: 20070307 |