CN203471727U - Novel hydraulic bolt tensioner - Google Patents
Novel hydraulic bolt tensioner Download PDFInfo
- Publication number
- CN203471727U CN203471727U CN201320273108.9U CN201320273108U CN203471727U CN 203471727 U CN203471727 U CN 203471727U CN 201320273108 U CN201320273108 U CN 201320273108U CN 203471727 U CN203471727 U CN 203471727U
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- piston body
- novel hydraulic
- hydraulic bolt
- piston
- main body
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Abstract
The utility model relates to a novel hydraulic bolt tensioner applied to the fields such as petrochemical industry, ships, railways, mining and heavy machinery. The novel hydraulic bolt tensioner mainly comprises a nut main body, a first piston body, a second piston body, a support pedestal, a positioning pedestal and a tightening operating lever, wherein the nut main body is in threaded connection with a bolt to be pre-tensioned through inner surface threads and are connected in a piston manner with the first piston body and the second piston body, an annular oil cavity is disposed between the first piston body and the second piston body and are sealed by sealing rings, the lower part of the first piston body is connected with the support pedestal and the positioning pedestal, the positioning pedestal is used for positioning a hexagon nut, and the hexagon nut is then tightened by the tightening operating lever. By using the novel hydraulic bolt tensioner, the disadvantages of the conventional bolt pre-tensioning technology are overcome, a net traction force is applied to the bolt through oil pressure so as to achieve the pre-tensioning aim, repeated installation of bolts of the same model can be realized through one single novel hydraulic bolt tensioner, the novel hydraulic bolt tensioner is rapid in installation, economic and universal, and the working efficiency in narrow space is maximized.
Description
Technical field
The utility model relates to bolt connection area, is specifically related to a kind of novel hydraulic bolt stretcher that is applied to the fields such as petrochemical industry, nuclear power, wind-powered electricity generation, water power, thermoelectricity, boats and ships, railway, mining, heavy-duty machinery.
Background technology
It is one of most popular connection in project installation field that bolt connects, existing bolt is installed the general moment of torsion firmly beforehand meanses such as spanner that adopt, in installation process, need to consider that static friction and dynamic friction, bolt are subject to moment of torsion and crooked impact, the phenomenon that can be distorted or damage fastener surface, and dismounting labour intensity is large, pretightning force is difficult to control, also there is many defects in existing use oil pressure pretension bolt mounting means simultaneously, oil gear itself has the effect of nut, therefore each bolt needs an oil pressure nut, and unloading inconvenience.
Summary of the invention
In order to overcome the deficiency in existing bolt mounting technique, the utility model provides a kind of novel hydraulic bolt stretcher.
The utility model solves the technical scheme that its technical problem adopts: novel hydraulic bolt stretcher comprises nut main body, piston body one, piston body two, base for supporting, positioning base, tighten control stick, nut main body is connected with the bolt of required pretension by inner surface screw thread, nut main body is provided with handle, be used for rotating dress and get hydraulic bolt stretcher, nut main body and piston body one and piston body two interconnect in the mode of piston simultaneously, between piston body one and piston body two, be provided with annular oil cavity, use sealing ring one simultaneously, sealing ring two seals, piston body one is provided with oil inlet passage, oil-feed connector, piston body one below connects base for supporting, it in base for supporting, is positioning base, positioning base is used for locating hex nut, on positioning base, have and tighten hole, tightening control stick stretches into tighten through base for supporting and in hole, is used for tightening hex nut, bolt stretcher is provided with end cap topmost, on end cap, have passage, between end cap and piston body two, be provided with back-moving spring simultaneously.
The beneficial effects of the utility model are: with certain oil pressure tensile bolt, only to bolt, apply net tractive effort, the bolt that is stretched can not be distorted or damage fastener superficial phenomenon, and shed oil pressure back piston and automatically reset under action of reset spring, as required, novel hydraulic bolt stretcher can be realized the installation that repeats of Multiple Type bolt, makes to install quick, economy, general, and in narrow space, operating efficiency maximizes.
Accompanying drawing explanation
Fig. 1 is that the utility model is installed pretension half sectional view
Fig. 2 is the utility model half sectional view
Fig. 3 is the utility model three-dimension integrally view one
Fig. 4 is the utility model three-dimension integrally view two
In figure: 1. nut main body; 2. end cap; 3. piston body one; 4. oil inlet passage; 5. oil-feed connector; 6. tighten control stick; 7. gasket seal; 8. bolt; 9. hex nut; 10. passage; 11. screwed holes; 12. piston bodies two; 13. sealing rings one; 14. oil pockets; 15. sealing rings two; 16. base for supporting; 17. tighten hole; 18. positioning bases; 19. pressing plates one; 20. pressing plates two; 21. back-moving springs; 22. handles.
The specific embodiment
Below by embodiment, and by reference to the accompanying drawings, the technical solution of the utility model is described in further detail.
Embodiment: shown in accompanying drawing, each numeral is expressed as follows respectively: 1. nut main body; 2. end cap; 3. piston body one; 4. oil inlet passage; 5. oil-feed connector; 6. tighten control stick; 7. gasket seal; 8. bolt; 9. hex nut; 10. passage; 11. screwed holes; 12. piston bodies two; 13. sealing rings one; 14. oil pockets; 15. sealing rings two; 16. base for supporting; 17. tighten hole; 18. positioning bases; 19. pressing plates one; 20. pressing plates two; 21. back-moving springs; 22. handles.The utility model is when carrying out bolt installation pretension, first position, novel hydraulic bolt stretcher is positioned on bolt 8, be about to nut main body 1 and be tightened on bolt 8, positioning base 18 is enclosed within on hex nut 9, base for supporting 16 and fastened pressing plate one 19 good contacts.Then stretch, by the pretightning force that needs to apply on calculating bolt 8, set hydraulic oil pressure, oil-feed connector 5 connects external high pressure fueller, hydraulic oil enters annular oil cavity 14 through oil inlet passage 4, hydraulic oil enters the rear jack-up piston body 2 12 of oil pocket 14, oil pressure is by piston body 2 12, 1 pair of bolt of nut main body 8 produces tractive force upwards, and then motion together of hex nut 9 in the time of tensile bolt 8, after reaching required pretightning force, hex nut 9 is tightened, by the hole 17 of tightening of tightening on control stick 6 insertion positioning bases 18, rotate positioning bases 18, positioning base 18 constraint hex nuts 9 carry out pretension.Finally, after hex nut 9 pretensions, stop external high pressure fuel feeding, now back-moving spring 21 pushes back nut main body 1, piston body 2 12 for initial position before oil pressure, and the former road of fluid is returned, and fluid can be reused.Hold handle 22 novel hydraulic bolt stretcher is unloaded from bolt 8, complete the installation pretension of nut.Same mode of operation can repeat pretension to same model bolt, and in loading procedure, 2 15 pairs of hydraulic oils of sealing ring 1 and sealing ring seal.Handle on nut main body, is used for rotating dress and gets hydraulic bolt stretcher.
Claims (3)
1. novel hydraulic bolt stretcher, it is characterized in that: novel hydraulic bolt stretcher comprises nut main body (1), piston body one (3), piston body two (12), base for supporting (16), positioning base (18), tighten control stick (6), nut main body (1) is connected with the bolt of required pretension by inner surface screw thread, nut main body (1) interconnects with piston body one (3) and piston body two (12) modes with piston simultaneously, between piston body one (3) and piston body two (12), be provided with annular oil cavity (14), use sealing ring one (13) simultaneously, sealing ring two (15) seals, piston body one (3) is provided with oil inlet passage (4), oil-feed connector (5), piston body one (3) below connects base for supporting (16), in base for supporting (16), be positioning base (18), positioning base (18) is used for locating hex nut (9), on positioning base (18), have and tighten hole (17), tightening control stick (6) stretches into tighten through base for supporting (16) and in hole (17), is used for tightening hex nut (9), bolt stretcher is topmost end cap (2), there is passage (10) above.
2. novel hydraulic bolt stretcher as claimed in claim 1, it is characterized in that: between end cap (2) and piston body two (12), be provided with back-moving spring (21), when stop external high pressure fuel feeding after hex nut (9) pretension, now back-moving spring (21) pushes back nut main body (1), piston body two (12) for initial position before oil pressure, the former road of fluid is returned, and fluid can be reused.
3. novel hydraulic bolt stretcher as claimed in claim 1, is characterized in that: nut main body (1) is provided with handle (22), is used for rotating dress and gets hydraulic bolt stretcher.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320273108.9U CN203471727U (en) | 2013-05-17 | 2013-05-17 | Novel hydraulic bolt tensioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320273108.9U CN203471727U (en) | 2013-05-17 | 2013-05-17 | Novel hydraulic bolt tensioner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203471727U true CN203471727U (en) | 2014-03-12 |
Family
ID=50220135
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320273108.9U Expired - Fee Related CN203471727U (en) | 2013-05-17 | 2013-05-17 | Novel hydraulic bolt tensioner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203471727U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20160297057A1 (en) * | 2015-04-09 | 2016-10-13 | Aktiebolaget Skf | Tensioning device for pre-stressing an assembly with a threaded rod |
| CN107379034A (en) * | 2017-08-08 | 2017-11-24 | 李承国 | A kind of cutter holder assembly of inner circle cutting machine |
| CN109488853A (en) * | 2019-01-07 | 2019-03-19 | 中国工程物理研究院总体工程研究所 | Sensor pre-pressing structure |
| CN109789540A (en) * | 2016-08-19 | 2019-05-21 | 汉斯克欧洲有限公司 | Pressure system |
| CN113195167A (en) * | 2018-12-21 | 2021-07-30 | 卡特彼勒能源方案有限公司 | Device for tensioning a connecting element |
| CN114321133A (en) * | 2021-12-31 | 2022-04-12 | 中重科技(天津)股份有限公司 | Resilience type hydraulic nut |
-
2013
- 2013-05-17 CN CN201320273108.9U patent/CN203471727U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20160297057A1 (en) * | 2015-04-09 | 2016-10-13 | Aktiebolaget Skf | Tensioning device for pre-stressing an assembly with a threaded rod |
| CN106041503A (en) * | 2015-04-09 | 2016-10-26 | 斯凯孚公司 | Tensioning device for pre-stressing assembly with threaded rod |
| US10569401B2 (en) | 2015-04-09 | 2020-02-25 | Aktiebolaget Skf | Tensioning device for pre-stressing an assembly with a threaded rod |
| CN109789540A (en) * | 2016-08-19 | 2019-05-21 | 汉斯克欧洲有限公司 | Pressure system |
| CN107379034A (en) * | 2017-08-08 | 2017-11-24 | 李承国 | A kind of cutter holder assembly of inner circle cutting machine |
| CN113195167A (en) * | 2018-12-21 | 2021-07-30 | 卡特彼勒能源方案有限公司 | Device for tensioning a connecting element |
| CN109488853A (en) * | 2019-01-07 | 2019-03-19 | 中国工程物理研究院总体工程研究所 | Sensor pre-pressing structure |
| CN114321133A (en) * | 2021-12-31 | 2022-04-12 | 中重科技(天津)股份有限公司 | Resilience type hydraulic nut |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| DD01 | Delivery of document by public notice |
Addressee: Li Peng Document name: Notification to Pay the Fees |
|
| DD01 | Delivery of document by public notice |
Addressee: Li Peng Document name: Notification of Termination of Patent Right |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140312 Termination date: 20150517 |
|
| EXPY | Termination of patent right or utility model |