CN201693346U - Strong-sealed bolt hydraulic tensioning jack - Google Patents
Strong-sealed bolt hydraulic tensioning jack Download PDFInfo
- Publication number
- CN201693346U CN201693346U CN2010202169736U CN201020216973U CN201693346U CN 201693346 U CN201693346 U CN 201693346U CN 2010202169736 U CN2010202169736 U CN 2010202169736U CN 201020216973 U CN201020216973 U CN 201020216973U CN 201693346 U CN201693346 U CN 201693346U
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- piston
- notch
- strong
- bolt hydraulic
- cylinder
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- Expired - Fee Related
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- Pistons, Piston Rings, And Cylinders (AREA)
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Abstract
The utility model discloses a strong-sealed bolt hydraulic tensioning jack, which comprises a cylinder, a piston, a seat retainer and a tensioning sleeve. The seat retainer arranged at the lower end of the cylinder is fixedly connected with the cylinder, the piston is arranged inside the cylinder, and the tensioning sleeve is arranged inside the piston. The strong-sealed bolt hydraulic tensioning jack is characterized in that a notch is arranged at the lower end of the piston, a seal ring with the shape identical to that of the notch is arranged inside the trapezoid notch, the notch is trapezoidal, and the section of the seal ring is also trapezoidal. Compared with the prior art, the strong-sealed bolt hydraulic tensioning jack has the advantages that the notch is arranged on the piston and the seal ring is fixed in the notch, sealing effect of the jack is better, and simultaneously materials of the cylinder and the piston are saved by arranging the notch on the piston.
Description
Technical field:
The utility model relates to a kind of bolt hydraulic elongator, specifically is a kind of bolt hydraulic elongator of good seal performance.
Technical background
At present for the bolt of diameter greater than 1 inch, use the common manual torque wrench and be and be difficult to its pretension, must be by the pre-clamping tool of a kind of special bolt with its pretension, that is exactly the bolt hydraulic elongator.As the patent No. is CN97234407.1 described " bolt hydraulic bolting device " by name, and it is made up of piston, oil cylinder and seat ring.Sealing ring is adopted in sealing between piston and the cylinder, but sealing ring generally all is to be enclosed within on the piston poor sealing performance.
Summary of the invention
Technical problem to be solved in the utility model is at above-mentioned the deficiencies in the prior art, and a kind of strong sealing bolt hydraulic elongator of good seal performance is provided.
For solving the problems of the technologies described above, the technical solution adopted in the utility model is: a kind of strong sealing bolt hydraulic elongator, comprise oil cylinder, piston, seat ring and expanding sleeve, described seat ring is arranged on the lower end of oil cylinder and fixedlys connected with oil cylinder, described piston is arranged in the oil cylinder, described expanding sleeve is arranged in the piston, it is characterized in that: be provided with a notch in the lower end of described piston, be provided with in this trapezoidal notch and the corresponding to sealing ring of notch shape.
Described notch is trapezoidal, and the cross section of described sealing ring also is trapezoidal.
Compared with prior art, the utility model has the advantages that: the utility model is offered notch on piston, and sealing ring is fixed in the notch, makes sealing effectiveness better, simultaneously, offers notch on piston, has saved the material of oil cylinder and piston.
Description of drawings
Fig. 1 is the structure chart of combined bolt hydraulic bolting device
Reference numeral: 1, expanding sleeve 2, oil cylinder 3, piston 4, sealing ring 5, drainage screw 6, screw 7, seat ring 8, stir handle 9, snap joint.
The specific embodiment
Describe technical scheme of the present invention in detail below in conjunction with accompanying drawing.
As shown in Figure 1, a kind of strong sealing bolt hydraulic elongator of the utility model, comprise oil cylinder 2, piston 3, seat ring 7, expanding sleeve 1, stir handle 8, seat ring 7 is arranged on the lower end of oil cylinder 2 and fixedlys connected with oil cylinder 2, piston 3 is arranged in the oil cylinder 2, expanding sleeve 1 is arranged in the piston 3, is provided with a notch in the lower end of piston 3, is provided with in this trapezoidal notch and the corresponding to sealing ring 4 of notch shape.The shape of notch can be trapezoidal, triangle or other shapes, and the cross sectional shape of sealing ring 4 also can be identical with notch trapezoidal, triangle or other shapes.
Claims (2)
1. one kind strong sealing bolt hydraulic elongator, comprise oil cylinder, piston, seat ring and expanding sleeve, described seat ring is arranged on the lower end of oil cylinder and fixedlys connected with oil cylinder, described piston is arranged in the oil cylinder, described expanding sleeve is arranged in the piston, it is characterized in that: be provided with a notch in the lower end of described piston, in this trapezoidal notch, be provided with and the corresponding to sealing ring of notch shape.
2. strong sealing bolt hydraulic elongator according to claim 1 is characterized in that: described notch is trapezoidal, and the cross section of described sealing ring also is trapezoidal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202169736U CN201693346U (en) | 2010-06-07 | 2010-06-07 | Strong-sealed bolt hydraulic tensioning jack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202169736U CN201693346U (en) | 2010-06-07 | 2010-06-07 | Strong-sealed bolt hydraulic tensioning jack |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201693346U true CN201693346U (en) | 2011-01-05 |
Family
ID=43394591
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202169736U Expired - Fee Related CN201693346U (en) | 2010-06-07 | 2010-06-07 | Strong-sealed bolt hydraulic tensioning jack |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201693346U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104551633A (en) * | 2014-12-10 | 2015-04-29 | 马鞍山市益华液压机具有限公司 | Single-stage short-type bolt tensioner |
-
2010
- 2010-06-07 CN CN2010202169736U patent/CN201693346U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104551633A (en) * | 2014-12-10 | 2015-04-29 | 马鞍山市益华液压机具有限公司 | Single-stage short-type bolt tensioner |
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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: 20110105 Termination date: 20130607 |