CN102990347A - Double-oil-cylinder bolt hydraulic elongator - Google Patents
Double-oil-cylinder bolt hydraulic elongator Download PDFInfo
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- CN102990347A CN102990347A CN 201110040893 CN201110040893A CN102990347A CN 102990347 A CN102990347 A CN 102990347A CN 201110040893 CN201110040893 CN 201110040893 CN 201110040893 A CN201110040893 A CN 201110040893A CN 102990347 A CN102990347 A CN 102990347A
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- oil cylinder
- oil
- cylinder
- plunger
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Abstract
The invention discloses a double-oil-cylinder bolt hydraulic elongator which comprises oil cylinders, a pressing plate and a housing washer. The housing washer is arranged at the lower end of one oil cylinder and fixedly connected with one oil cylinder. The double-oil-cylinder bolt hydraulic elongator is characterized in that the two oil cylinders are connected in series, a plunger is arranged in a first oil cylinder, a piston is arranged in a second oil cylinder, the piston is fixed on the plunger, the pressing plate is fixed on the second oil cylinder, and the housing washer is fixed on the first oil cylinder. Compared with the prior art, the double-oil-cylinder bolt hydraulic elongator has the advantages that double oil cylinders are adopted, elongation is achieved through combined action of the plunger and the piston fixedly connected with the plunger, radial size is reduced, elongation force is increased, and the defect of a large-diameter workpiece that threads are short and a common single-stage oil cylinder can not be adopted is overcome.
Description
Technical field:
The present invention relates to specifically a kind of large two cylinder hydraulic bolt tensioners of tensile force of a kind of bolt hydraulic tensioning.
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 bolt hydraulic stretcher.Be CN97234407.1 described by name " hydraulic bolt tightening device " such as the patent No., it is comprised of piston, oil cylinder and seat ring.Improved tensile force, during for large-diameter workpiece, screw thread is short, adopts the tensile force of ordinary single-stage oil cylinder not enough, so can not be suitable for.
Summary of the invention
Technical problem to be solved by this invention is for above-mentioned the deficiencies in the prior art, and provides a kind of tensile force large two cylinder hydraulic bolt tensioners.
For solving the problems of the technologies described above, the technical solution used in the present invention is: a kind of pair of cylinder hydraulic bolt tensioner, comprise oil cylinder, pressing plate and seat ring, described seat ring is arranged on the lower end of oil cylinder and is fixedly connected with oil cylinder, it is characterized in that: described oil cylinder is two and series connection, is provided with plunger in the first oil cylinder, in the second oil cylinder, be provided with piston, described piston is fixed on the plunger, and described pressing plate is fixed on the second oil cylinder, and described seat ring is fixed on the first oil cylinder.
Compared with prior art, advantage of the present invention is: the present invention adopts two oil cylinders, and two actings in conjunction of the piston that is fixedly 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 hydraulic bolt tightening 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, the second oil cylinder 14, support ring 15, O type circle 16, O type circle 17, support ring 18, the 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 cylinder hydraulic bolt tensioner of the present invention, comprise the first oil cylinder 18, the second oil cylinder 13, pressing plate 4, snap joint 1, plunger 2, piston 5 and seat ring 19, described seat ring 19 is fixedly connected with the first oil cylinder 18, plunger 2 runs through the first oil cylinder 18 and the second oil cylinder 13, plunger 2 and 18 sealings of the first oil cylinder, and actuation plunger 2 motions, at the second oil cylinder 13 interior encapsulation pistons 5, 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 cylinder hydraulic bolt tensioner, comprise oil cylinder, pressing plate and seat ring, described seat ring is arranged on the lower end of oil cylinder and is fixedly connected with oil cylinder, it is characterized in that: described oil cylinder is two and series connection, be provided with plunger in the first oil cylinder, be provided with piston in the second oil cylinder, described piston is fixed on the plunger, described pressing plate is fixed on the second oil cylinder, and described seat ring is fixed on the first oil cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110040893 CN102990347A (en) | 2011-02-18 | 2011-02-18 | Double-oil-cylinder bolt hydraulic elongator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110040893 CN102990347A (en) | 2011-02-18 | 2011-02-18 | Double-oil-cylinder bolt hydraulic elongator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102990347A true CN102990347A (en) | 2013-03-27 |
Family
ID=47919745
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110040893 Pending CN102990347A (en) | 2011-02-18 | 2011-02-18 | Double-oil-cylinder bolt hydraulic elongator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102990347A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111706637A (en) * | 2020-06-19 | 2020-09-25 | 北京航天发射技术研究所 | Hydraulic stretcher for spring large load |
-
2011
- 2011-02-18 CN CN 201110040893 patent/CN102990347A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111706637A (en) * | 2020-06-19 | 2020-09-25 | 北京航天发射技术研究所 | Hydraulic stretcher for spring large load |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20130327 |