CN201693348U - Dual-cylinder hydraulic bolt tensioner - Google Patents
Dual-cylinder hydraulic bolt tensioner Download PDFInfo
- Publication number
- CN201693348U CN201693348U CN2010202169789U CN201020216978U CN201693348U CN 201693348 U CN201693348 U CN 201693348U CN 2010202169789 U CN2010202169789 U CN 2010202169789U CN 201020216978 U CN201020216978 U CN 201020216978U CN 201693348 U CN201693348 U CN 201693348U
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- oil cylinder
- cylinder
- plunger
- seat ring
- fixed
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Abstract
The utility model discloses a dual-cylinder hydraulic bolt tensioner, which comprises cylinders, a pressing plate and a seat ring. The seat ring is arranged on the lower ends of the cylinders and is fixedly connected with the cylinder. The dual-cylinder hydraulic bolt tensioner is characterized in that two cylinders are adopted and are connected in series, a plunger is arranged in the first cylinder, a piston is arranged in the second cylinder and is fixed on the plunger, the pressing plate is fixed on the second cylinder, and the seat ring is fixed on the first cylinder. Compared with the prior art, the utility model has the advantages that: the two cylinders are adopted, and the tensioning is realized under the combined action of the plunger and the piston fixedly connected with the plunger, thereby reducing the radial volume, increasing the tensile force, and overcoming the defect that the ordinary single-stage cylinder with short threads can not be used for large-diameter work pieces.
Description
Technical field:
The utility model relates to a kind of bolt hydraulic elongator, specifically is a kind of big two oil cylinder bolt hydraulic elongators of tensile force.
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.Improved tensile force, during for large-diameter workpiece, screw thread is short, adopts the tensile force deficiency of ordinary single-stage oil cylinder, so can not be suitable for.
Summary of the invention
Technical problem to be solved in the utility model is at above-mentioned the deficiencies in the prior art, and provides a kind of tensile force big two oil cylinder bolt hydraulic elongators.
For solving the problems of the technologies described above, the technical solution adopted in the utility model is: a kind of pair of oil cylinder bolt hydraulic elongator, comprise oil cylinder, pressing plate and seat ring, described seat ring is arranged on the lower end of oil cylinder and fixedlys connected with oil cylinder, it is characterized in that: described oil cylinder is two and series connection, is provided with plunger in first oil cylinder, in second oil cylinder, be provided with piston, described piston is fixed on the plunger, and described pressing plate is fixed on second oil cylinder, and described seat ring is fixed on first oil cylinder.
Compared with prior art, the utility model has the advantages that: the utility model adopts two oil cylinders, and two actings in conjunction of the piston of fixedlying connected with the rain plunger by plunger realize stretching, dwindled radially volume, improved tensile force, when solving large-diameter workpiece, the screw thread weak point can not adopt the drawback of ordinary single-stage oil cylinder.
Description of drawings
Fig. 1 is the structure chart of combined bolt hydraulic bolting device
Reference numeral: 1, snap joint 2, plunger 3, nut 4, pressing plate 5, piston 6, support ring 7, O type circle 8, support ring 9, O type circle 10, O type circle 11, support ring 12, cup head set screw 13, second oil cylinder 14, support ring 15, O type circle 16, O type circle 17, support ring 18, first oil cylinder 19, seat ring.
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 pair of oil cylinder bolt of the utility model hydraulic elongator, comprise first oil cylinder 18, second oil cylinder 13, pressing plate 4, snap joint 1, plunger 2, piston 5 and seat ring 19, described seat ring 19 is fixedlyed connected with first oil cylinder 18, plunger 2 runs through first oil cylinder 18 and second oil cylinder 13, plunger 2 and 18 sealings of first oil cylinder, and actuation plunger 2 motions, encapsulation piston 5 in second oil cylinder 13, piston 5 is fixed on the plunger 2,5 motions of one or two oil cylinders, 13 driven plunger, thus acting in conjunction is on plunger 5 indirectly.
Claims (1)
1. two oil cylinder bolt hydraulic elongator, comprise oil cylinder, pressing plate and seat ring, described seat ring is arranged on the lower end of oil cylinder and fixedlys connected with oil cylinder, it is characterized in that: described oil cylinder is two and series connection, be provided with plunger in first oil cylinder, be provided with piston in second oil cylinder, described piston is fixed on the plunger, described pressing plate is fixed on second oil cylinder, and described seat ring is fixed on first oil cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202169789U CN201693348U (en) | 2010-06-07 | 2010-06-07 | Dual-cylinder hydraulic bolt tensioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202169789U CN201693348U (en) | 2010-06-07 | 2010-06-07 | Dual-cylinder hydraulic bolt tensioner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201693348U true CN201693348U (en) | 2011-01-05 |
Family
ID=43394593
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202169789U Expired - Fee Related CN201693348U (en) | 2010-06-07 | 2010-06-07 | Dual-cylinder hydraulic bolt tensioner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201693348U (en) |
-
2010
- 2010-06-07 CN CN2010202169789U patent/CN201693348U/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 | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110105 Termination date: 20130607 |