CN203509531U - Double-stage bolt stretching device - Google Patents
Double-stage bolt stretching device Download PDFInfo
- Publication number
- CN203509531U CN203509531U CN201320577313.4U CN201320577313U CN203509531U CN 203509531 U CN203509531 U CN 203509531U CN 201320577313 U CN201320577313 U CN 201320577313U CN 203509531 U CN203509531 U CN 203509531U
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- CN
- China
- Prior art keywords
- cylinder body
- level cylinder
- locking nut
- cover plate
- piston
- 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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- Hand Tools For Fitting Together And Separating, Or Other Hand Tools (AREA)
Abstract
The utility model discloses a double-stage bolt stretching device which comprises a first-level cylinder body and a second-level cylinder body, wherein the first-level cylinder body and the second-level cylinder body are buckled together in the longitudinal direction. A piston is arranged in first-level cylinder body and the second-level cylinder in a sealing matched mode, the inside of the piston is provided with a pull rod in a matched mode, the lower end portion of the pull rod is provided with a pull head, the inside of the pull head is provided with an internal threaded hole where a bolt to be stretched is screwed, the periphery of the pull head is provided with a supporting sleeve matched with the lower end face of the first-level cylinder body, a poking sleeve is fixedly arranged in the supporting sleeve in a sleeved mode, poking teeth are distributed on the outer circumferential face of the upper portion of the poking sleeve and are driven by a tooth poking wheel driven by a poking rod, the upper end portion of the piston is provided with a counter bore, a locking nut is installed in the counter bore in a matched mode, internal threads are arranged in the locking nut, a hollow cover plate is arranged between the upper end face of the second-level cylinder body and the locking nut, a spring is arranged in a cavity inside the cover plate, and the cover plate is provided with a handle. The double-stage bolt stretching device is of a double-oil-cylinder design, is small in size and low in weight, fully makes use of operation space, is convenient to carry, can produce double stretching force under identical work pressure, and reduces labor intensity of operators.
Description
Technical field
The utility model relates to a kind of stretcher, relates in particular to a kind of twin-stage bolt tensioning jack.
Background technology
Existing bolt tensioning jack volume is large, and weight is high, takes up room large, is not easy to carry; Under uniform pressure, tensile force is little, and labour intensity is high, can not meet the needs of the densely distributed occasion of bolt.
Utility model content
The purpose of this utility model is in order to make up the deficiency of prior art, and a kind of twin-stage bolt tensioning jack is provided.
The utility model is achieved through the following technical solutions:
A kind of twin-stage bolt tensioning jack, include two one-levels that fasten up and down, secondary cylinder body, it is characterized in that: described one-level, in secondary cylinder body, be sealed with respectively piston, in described piston, be provided with the through hole being interconnected, in described through hole, coordinate pull bar is installed, the bottom of described pull bar stretch out in one-level cylinder body lower surface, and external part is provided with pull head, in described pull head, be provided with and the internal thread hole for the treatment of that tensile bolt screws, described pull head outer circumferential position is provided with the support set coordinating with one-level cylinder body lower surface, in described support set, fixed cover is equipped with pulling sleeve, on the outer circumference surface of described pulling sleeve upper end, be distributed with moving tooth, the support set of described moving tooth corresponding position is provided with breach, in described breach, be provided with the moving tooth wheel with moving tooth engagement, described moving tooth wheel is driven by the driving lever at its middle part, the upper end of described piston is provided with counterbore, in described counterbore, coordinate locking nut is installed, in described locking nut, be provided with internal thread, and screw with the upper end of pull bar, on the upper surface of described locking nut, be distributed with adjustment hole, on the upper surface of described secondary cylinder body and be provided with the cover plate of hollow between locking nut, cavity in described cover plate is placed with spring, described cover plate is provided with handle.
In described one-level, secondary cylinder body, be respectively equipped with stepped hole, and the aperture section of stepped hole lays respectively at the hypomere portion of cylinder body, its inside is provided with the oil inlet passage towards stepped hole macropore section, and described two oil inlet passages are communicated with snap joint by triple valve.
The utility model has the advantages that:
The utility model adopts two oil cylinder designs (being furnished with triple valve), and volume is little, lightweight, takes full advantage of operating space, is easy to carry, and outward appearance is simply graceful; Identical operating pressure can produce the tensile force of two times, reduces operator's labour intensity.
Accompanying drawing explanation
Fig. 1 is the utility model structural representation.
The specific embodiment
Referring to accompanying drawing, a kind of twin-stage bolt tensioning jack, include two one-levels that fasten up and down, secondary cylinder body 1, 2, one-level, secondary cylinder body 1, the 2 interior pistons 3 that are sealed with respectively, in piston 3, be provided with the through hole being interconnected, in through hole, coordinate pull bar 4 is installed, the bottom of pull bar 4 stretch out in one-level cylinder body 1 lower surface, and external part is provided with pull head 5, in pull head 5, be provided with and the internal thread hole for the treatment of that tensile bolt screws, pull head 5 outer circumferential positions are provided with the support set 7 coordinating with one-level cylinder body 1 lower surface, the interior fixed cover of support set 7 is equipped with pulling sleeve 8, on pulling sleeve 8 upper end outer circumference surfaces, be distributed with moving tooth, the support set 7 of moving tooth corresponding position is provided with breach, in breach, be provided with the moving tooth wheel 9 with moving tooth engagement, moving tooth wheel 9 is driven by the driving lever 10 at its middle part, the upper end of piston 3 is provided with counterbore, in counterbore, coordinate locking nut 11 is installed, in locking nut 11, be provided with internal thread, and screw with the upper end of pull bar 4, on the upper surface of locking nut 11, be distributed with adjustment hole 12, on the upper surface of secondary cylinder body and be provided with the cover plate 13 of hollow between locking nut, cavity in cover plate 13 is placed with spring 14, cover plate is provided with handle 15.In one-level, secondary cylinder body 1,2, be respectively equipped with stepped hole, and the aperture section of stepped hole lays respectively at the hypomere portion of cylinder body, its inside is provided with the oil inlet passage towards stepped hole macropore section, and two oil inlet passages are communicated with snap joint by triple valve.
Operation principle:
A. stretcher is placed on bolt, with die nut (providing for oneself), moves with the hand bar 10 pulling holes, the screw thread of pull bar 4 and bolt thread are screwed, rotate moving tooth wheel wheel 9 simultaneously, pulling sleeve 8 is enclosed within on nut;
B. after double-stage hydraulic stretcher and pumping plant being connected with high-pressure rubber pipe, relief lever on locking pumping plant, operation depression bar, observe gauge hand simultaneously, when gauge hand points to required pressure, unclamp depression bar, with die nut rotation driving lever, 10(is counterclockwise clamping screw, clockwise for unscrewing bolt), now moving tooth wheel wheel 9 drives pulling sleeve 8 rotating nuts, and observe whether joint close of bolt and supporting surface by peep hole, and after joint close, can unscrew relief lever, now bolt has reached predetermined pretension effect;
If c. stretcher has reached range, stop immediately upper pressure, with die nut rotation driving lever 10, after nut and supporting surface joint close, unscrew the relief lever on pumping plant, then use die nut rotating rod 4 pulling holes, pull bar 4 screws relief lever downwards again after screwing, repeating step b, until pump station pressure reaches required pressure;
D. when bolt reaches after pretension requirement, unscrew the relief lever on pumping plant, can take off stretcher.
Claims (2)
1. a twin-stage bolt tensioning jack, include two one-levels that fasten up and down, secondary cylinder body, it is characterized in that: described one-level, in secondary cylinder body, be sealed with respectively piston, in described piston, be provided with the through hole being interconnected, in described through hole, coordinate pull bar is installed, the bottom of described pull bar stretches out in the lower surface of one-level cylinder body, and external part is provided with pull head, in described pull head, be provided with and the internal thread hole for the treatment of that tensile bolt screws, described pull head outer circumferential position is provided with the support set coordinating with one-level cylinder body lower surface, in described support set, fixed cover is equipped with pulling sleeve, on the outer circumference surface of described pulling sleeve upper end, be distributed with moving tooth, the support set of described moving tooth corresponding position is provided with breach, in described breach, be provided with the moving tooth wheel with moving tooth engagement, described moving tooth wheel is driven by the driving lever at its middle part, the upper end of described piston is provided with counterbore, in described counterbore, coordinate locking nut is installed, in described locking nut, be provided with internal thread, and screw with the upper end of pull bar, on the upper surface of described locking nut, be distributed with adjustment hole, on the upper surface of described secondary cylinder body and be provided with the cover plate of hollow between locking nut, cavity in described cover plate is placed with spring, described cover plate is provided with handle.
2. twin-stage bolt tensioning jack according to claim 1, it is characterized in that: in described one-level, secondary cylinder body, be respectively equipped with stepped hole, and the aperture section of stepped hole lays respectively at the hypomere portion of cylinder body, its inside is provided with the oil inlet passage towards stepped hole macropore section, and described two oil inlet passages are communicated with snap joint by triple valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320577313.4U CN203509531U (en) | 2013-09-17 | 2013-09-17 | Double-stage bolt stretching device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320577313.4U CN203509531U (en) | 2013-09-17 | 2013-09-17 | Double-stage bolt stretching device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203509531U true CN203509531U (en) | 2014-04-02 |
Family
ID=50368513
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320577313.4U Expired - Fee Related CN203509531U (en) | 2013-09-17 | 2013-09-17 | Double-stage bolt stretching device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203509531U (en) |
-
2013
- 2013-09-17 CN CN201320577313.4U patent/CN203509531U/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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140402 Termination date: 20150917 |
|
| EXPY | Termination of patent right or utility model |