CN204545900U - A kind of nut stretching device for screwing up - Google Patents
A kind of nut stretching device for screwing up Download PDFInfo
- Publication number
- CN204545900U CN204545900U CN201520247410.6U CN201520247410U CN204545900U CN 204545900 U CN204545900 U CN 204545900U CN 201520247410 U CN201520247410 U CN 201520247410U CN 204545900 U CN204545900 U CN 204545900U
- Authority
- CN
- China
- Prior art keywords
- nut
- wrench socket
- bolt
- pulling shaft
- screwing
- 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
A kind of nut stretching device for screwing up, comprises nut, wrench socket, pulling shaft, buffer compensation device, shaft seat and moment applying mechanism; Described nut is placed in wrench socket; Described pulling shaft front end is screwed hole, can be screwed into bolt, and also there is screw thread pulling shaft rear end; Together with described wrench socket is bolted with shaft seat, can slide along pulling shaft.Described buffer compensation Zhuan Catching-rabbits can realize the buffering of wrench socket, and to nut initial thrust that wrench socket is deposited.Described moment applying mechanism is provided with gear, applies screw-down torque by hydraulic motor band trend wrench socket, realizes nut and screws in bolt.The technical program can improve the control accuracy of pretightning force, and device adopts stretching mode to apply pretightning force, instead of moment fastening nut, so device takes up room little.
Description
Technical field
The utility model relates to pipe fitting interconnection technique, especially a kind of nut stretching device for screwing up.
Background technology
Bolt tightening mode has many kinds, and common principle of tightening is by rotating nut, and produce pretightning force after applying moment, conventional method has screwing force moments method, and the anglec of rotation tightens method, and the plastic region anglec of rotation tightens method, and gradient tightens method etc.
Stretching, to tighten be the key technology of pipelines in deep sea Flange joint facility, mainly realizes tensile bolt and apply pretightning force, nut is screwed into the function of bolt.Because mechanism's working space is limited, the bolt pretightening of adpting flange is large, so apparatus design wants it to have the feature of little space, large pretightning force.Meanwhile, design also will ensure the deep ocean work reliability of facility.
Utility model content
The purpose of this utility model is, provides a kind of nut stretching device for screwing up.
The technical solution of the utility model: a kind of nut stretching device for screwing up, comprises nut, wrench socket, pulling shaft, buffer compensation device, shaft seat and moment applying mechanism; Described nut is placed in wrench socket; Described pulling shaft front end is screwed hole, can be screwed into bolt, and also there is screw thread pulling shaft rear end; Together with described wrench socket is bolted with shaft seat, can slide along pulling shaft.Described buffer compensation Zhuan Catching-rabbits can realize the buffering of wrench socket, and to nut initial thrust that wrench socket is deposited.Described moment applying mechanism is provided with gear, applies screw-down torque by hydraulic motor band trend wrench socket, realizes nut and screws in bolt.
Brand-new stretching device for screwing up conventional tightening way different from the past, it completes the Flange joint of deep-water subsea pipeline with a kind of tightening method that stretches, it is directly apply tensile force to bolt that principle is tightened in stretching, bolt is extended vertically, then little moment tightening nut, the nut be screwed into can keep bolt Zhongchang to measure the pretightning force produced, tensile force to be removed, just the pretightning force equal with pulling force can be produced in this connection because bolt shrinks, because screw pair does not have moment of friction, bolt is not by shear stress, and therefore bolt has and higher bears axial tension ability.Such firmly beforehand means can improve the control accuracy of pretightning force, and device adopts stretching mode to apply pretightning force, instead of moment fastening nut, so device takes up room little.
Accompanying drawing explanation
Fig. 1 is the utility model general structure schematic diagram.
In figure, 1 nut; 2 wrench sockets; 3 pulling shafts; 4 buffer compensation devices; 5 shaft seats; 6 moment applying mechanisms.
Detailed description of the invention
Embodiment: as diagram, a kind of nut stretching device for screwing up, comprises nut 1, wrench socket 2, pulling shaft 3, buffer compensation device 4, shaft seat 5 and moment applying mechanism 6; Described nut 1 is placed in wrench socket 2; Described pulling shaft 3 front end is screwed hole, can be screwed into bolt, and also there is screw thread pulling shaft 3 rear end; Described wrench socket 2 can slide along pulling shaft together with being bolted with shaft seat 5.Described buffer compensation Zhuan Catching-rabbits 4 can realize the buffering of wrench socket 2, and gives nut 1 one initial thrusts that wrench socket 2 is deposited.Described moment applying mechanism 6 is provided with gear, applies screw-down torque, realize nut 1 and screw in bolt by hydraulic motor band trend wrench socket 2.
Brand-new stretching device for screwing up conventional tightening way different from the past, it completes the Flange joint of deep-water subsea pipeline with a kind of tightening method that stretches, it is directly apply tensile force to bolt that principle is tightened in stretching, bolt is extended vertically, then little moment tightening nut, the nut be screwed into can keep bolt Zhongchang to measure the pretightning force produced, tensile force to be removed, just the pretightning force equal with pulling force can be produced in this connection because bolt shrinks, because screw pair does not have moment of friction, bolt is not by shear stress, and therefore bolt has and higher bears axial tension ability.Such firmly beforehand means can improve the control accuracy of pretightning force, and device adopts stretching mode to apply pretightning force, instead of moment fastening nut, so device takes up room little.
Should point out; for a person skilled in the art, under the prerequisite not departing from the utility model structure, some distortion and improvement can also be made; these also should be considered as protection domain of the present utility model, and these all can not affect effect and the practical applicability of the utility model enforcement.
Claims (3)
1. a nut stretching device for screwing up, is characterized in that, comprises nut, wrench socket, pulling shaft, buffer compensation device, shaft seat and moment applying mechanism; Described nut is placed in wrench socket; Described pulling shaft front end is screwed hole, can be screwed into bolt, and also there is screw thread pulling shaft rear end; Together with described wrench socket is bolted with shaft seat, can slide along pulling shaft.
2. a kind of nut stretching device for screwing up as claimed in claim 1, it is characterized in that, described buffer compensation Zhuan Catching-rabbits can realize the buffering of wrench socket, and to nut initial thrust that wrench socket is deposited.
3. a kind of nut stretching device for screwing up as claimed in claim 1, it is characterized in that, described moment applying mechanism is provided with gear, applies screw-down torque by hydraulic motor band trend wrench socket, realizes nut and screws in bolt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520247410.6U CN204545900U (en) | 2015-04-23 | 2015-04-23 | A kind of nut stretching device for screwing up |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520247410.6U CN204545900U (en) | 2015-04-23 | 2015-04-23 | A kind of nut stretching device for screwing up |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204545900U true CN204545900U (en) | 2015-08-12 |
Family
ID=53821065
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520247410.6U Expired - Fee Related CN204545900U (en) | 2015-04-23 | 2015-04-23 | A kind of nut stretching device for screwing up |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204545900U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105215658A (en) * | 2015-09-10 | 2016-01-06 | 北京动力机械研究所 | Turbogenerator disc assembly assembling and disassembling device |
| CN107081703A (en) * | 2017-06-22 | 2017-08-22 | 兰州交通大学 | Based on the connecting rod screw stretching-machine for determining moment of torsion slow-speed of revolution electric wrench |
| CN109968012A (en) * | 2019-04-16 | 2019-07-05 | 西安航天动力研究所 | A kind of tightening method and axially loaded formula screwing tool of helium turbine shafting |
| CN111251236A (en) * | 2020-03-17 | 2020-06-09 | 深圳市中车业成实业有限公司 | Single-cycle structure damper core valve seat screwing assembly for rail vehicle |
-
2015
- 2015-04-23 CN CN201520247410.6U patent/CN204545900U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105215658A (en) * | 2015-09-10 | 2016-01-06 | 北京动力机械研究所 | Turbogenerator disc assembly assembling and disassembling device |
| CN107081703A (en) * | 2017-06-22 | 2017-08-22 | 兰州交通大学 | Based on the connecting rod screw stretching-machine for determining moment of torsion slow-speed of revolution electric wrench |
| CN109968012A (en) * | 2019-04-16 | 2019-07-05 | 西安航天动力研究所 | A kind of tightening method and axially loaded formula screwing tool of helium turbine shafting |
| CN109968012B (en) * | 2019-04-16 | 2020-06-30 | 西安航天动力研究所 | Helium turbine shafting tightening method and axial loading type tightening tool |
| CN111251236A (en) * | 2020-03-17 | 2020-06-09 | 深圳市中车业成实业有限公司 | Single-cycle structure damper core valve seat screwing assembly for rail vehicle |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150812 Termination date: 20160423 |