CN2212586Y - Hydraulic top-pressure prestress jack with internal oil-way - Google Patents
Hydraulic top-pressure prestress jack with internal oil-way Download PDFInfo
- Publication number
- CN2212586Y CN2212586Y CN 94219761 CN94219761U CN2212586Y CN 2212586 Y CN2212586 Y CN 2212586Y CN 94219761 CN94219761 CN 94219761 CN 94219761 U CN94219761 U CN 94219761U CN 2212586 Y CN2212586 Y CN 2212586Y
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- CN
- China
- Prior art keywords
- oil
- hydraulic
- cylinder
- pressure
- pressing device
- 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 discloses construction equipment which is used for prestressing tensioning operation, particularly a hydraulic top-pressure jack, and the utility model is composed of a hydraulic oil cylinder, a hydraulic top-pressure device and other components. A close type longitudinal run-through oil channel is arranged in the cylinder wall of the middle cylinder of the hydraulic oil cylinder, an opening arranged on the front end of the oil channel leads to the oil passage of the hydraulic top-pressure device, and an opening arranged on the rear end of the oil channel is communicated with the oil pressure cavity of the hydraulic oil cylinder. A structure with the inner oil passage adopted by the utility model efficiently solves a problem that the joint of the original external oil-receiving pipe of the hydraulic top-pressure device is easily damaged; the utility model is beneficial to construction operation.
Description
The utility model belongs to the prestressed stretch-draw facility.
In the prestressed reinforced concrete work progress, the hydraulic pressure roof pressure jack that uses mainly is made up of parts such as hydraulic ram, hydraulic pressure top pressing device and ground tackles at present.This class jack is except the external oil pipe of hydraulic ram, and the hydraulic pressure top pressing device is also wanted external oil pipe.Otherwise the roof pressure piston in the top pressing device just can not get the thrust of working medium, can't make the deformed bar after the ground tackle card fixes stretch-draw.Because the external oil pipe of top pressing device is in use kept away unavoidable external colliding with and twisting,, cause working medium excessive and pollute adverse consequences such as working environment so the external tapping regular meeting of this oil pipe breaks down.
The purpose of the utility model is at above-mentioned situation, and a kind of improved interior oil circuit hydraulic pressure roof pressure prestress jack is provided.The characteristics of this jack are that external oil pipe is not set on the hydraulic pressure top pressing device, utilize the oil cylinder casing wall that an enclosed interior asphalt channel is set, with the top anchor, return cylinder, move back function oil circuit such as cylinder and concentrate in together, solved hydraulic pressure top pressing device external oil circuit interface sensitive for damages effectively and working medium is excessive and problem such as contaminated environment.
The purpose of this utility model realizes by following scheme.In view of the hydraulic ram of hydraulic jack is to be made of outer shell, inner casing and middle cylinder, and the front end of middle cylinder connecting the hydraulic pressure top pressing device, thus on the casing wall of middle cylinder, open the asphalt channel that leads to the hydraulic pressure top pressing device, and allow this passage be communicated with the oil circuit of hydraulic pressure top pressing device.Like this, hydraulic jack has not only been exempted the interference that former external oil pipe brings to operation, has also guaranteed the unimpeded of oil circuit simultaneously, has brought convenience to construction operation.
The utility model is described in further detail below in conjunction with accompanying drawing.Fig. 1 is the hydraulic pressure roof pressure jack structure cut-away view that uses at present.Fig. 2 is an interior oil circuit hydraulic pressure roof pressure prestress jack structure cut-away view described in the utility model.
With reference to accompanying drawing, the utility model is made up of hydraulic ram and hydraulic pressure top pressing device major parts such as (4).Hydraulic ram is again to be made of outer shell (1), inner casing (3) and middle cylinder (2).Middle cylinder (2) front end is connected with hydraulic pressure top pressing device (4).Middle cylinder (2) body is positioned between outer shell (1) and the inner casing (3).Be processed with enclosed vertical perforation asphalt channel (5) within the casing wall of middle cylinder (2).The preceding perforate of this asphalt channel (5) communicates with the asphalt channel of hydraulic pressure top pressing device (4).Described flow path channel (5) perforate thereafter communicates with the oil pressure chamber of hydraulic ram.Establish piston (6) in the oil pressure chamber.The external propulsion source oil pipe of its outer wall of oil pressure chamber (7) that piston (6) is anterior.The also external propulsion source oil pipe of its outer wall of oil pressure chamber (8) at piston (6) rear portion.During operation, working medium injects oil pressure chamber, rear portion through oil pipe (8) under the control of fluid control valve, impels the oil cylinder stretching, extension and specified requirement is arrived in reinforcement stresses stretch-draw.Subsequently, working medium injects anterior oil pressure chamber and passes the asphalt channel that asphalt channel (5) in the casing wall enters top pressing device (4) through oil pipe (7) under the control of fluid control valve again.Continue to increase roof pressure piston (9) in the working medium pushing tow top pressing device (4) and the piston (6) in the oil pressure chamber though pressure.Working medium in the oil pressure chamber, rear portion forwardly under the pushed at high pressure of oil pressure chamber working medium, is squeezed by piston (6), flow back into fuel tank along oil pipe (8).Like this, the top anchor of jack, return cylinder and move back cylinder working and just be accomplished.
The utility model has solved the problem that the external oil pipe of little tonnage hydraulic jack subjects to damage at interface effectively because of having adopted the enclosed interior oil circuit scheme of casing wall.
Claims (1)
1, oil circuit hydraulic pressure roof pressure prestress jack in a kind of, the construction equipment that belongs to the prestressed stretch-draw operation, it is made up of hydraulic ram and hydraulic pressure top pressing device major parts such as (4), hydraulic ram is again by outer shell (1), inner casing (3) and middle cylinder (2) constitute, middle cylinder (2) front end is connected with hydraulic pressure top pressing device (4), middle cylinder (2) body is positioned between outer shell (1) and the inner casing (3), it is characterized in that being processed with enclosed vertical perforation asphalt channel (5) within the casing wall of cylinder (2), the preceding perforate of this asphalt channel (5) communicates with the asphalt channel of hydraulic pressure top pressing device (4), back perforate then communicates with the oil pressure chamber of hydraulic ram, establish piston (6) in the oil pressure chamber, the external propulsion source oil pipe of its outer wall of oil pressure chamber (7) that piston (6) is anterior, the also external propulsion source oil pipe of its outer wall of oil pressure chamber (8) at piston (6) rear portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94219761 CN2212586Y (en) | 1994-08-30 | 1994-08-30 | Hydraulic top-pressure prestress jack with internal oil-way |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94219761 CN2212586Y (en) | 1994-08-30 | 1994-08-30 | Hydraulic top-pressure prestress jack with internal oil-way |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2212586Y true CN2212586Y (en) | 1995-11-15 |
Family
ID=33834540
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 94219761 Expired - Fee Related CN2212586Y (en) | 1994-08-30 | 1994-08-30 | Hydraulic top-pressure prestress jack with internal oil-way |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2212586Y (en) |
-
1994
- 1994-08-30 CN CN 94219761 patent/CN2212586Y/en not_active Expired - Fee Related
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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 |