CN203003462U - Bolt hydraulic stretcher - Google Patents
Bolt hydraulic stretcher Download PDFInfo
- Publication number
- CN203003462U CN203003462U CN 201220742595 CN201220742595U CN203003462U CN 203003462 U CN203003462 U CN 203003462U CN 201220742595 CN201220742595 CN 201220742595 CN 201220742595 U CN201220742595 U CN 201220742595U CN 203003462 U CN203003462 U CN 203003462U
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- CN
- China
- Prior art keywords
- cylinder body
- piston
- bolt
- bolts
- hydraulic stretcher
- 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 provides a bolt hydraulic stretcher. The bolt hydraulic stretcher comprises a supporting ring, a cylinder body, a piston and a pipe connector, wherein one end of the supporting ring is connected with the cylinder body, and the piston is arranged in the cylinder body. The lower portion of the piston is connected with the cylinder body through a first sealing assembly, the upper portion of the piston is connected with the cylinder body through a second sealing assembly, and the pipe connector is arranged between the piston and the cylinder body. The bolt hydraulic stretcher has the advantages that due to adoption of the technical scheme, simultaneous stretching can be carried out on a plurality of bolts, stress of the bolts on the whole circle is enabled to be even, and a balanced load is obtained. Disassembly and assembly of the bolts can be achieved in small space. A surplus load and an effective load obtained through fastening the bolts in a stretching mode are larger than a surplus load and an effective load obtained in a torque mode. The stretching mode is suitable for joint application which has high requirements on fastening accuracy, joint of flanges is achieved while the flanges are under even stress, and leakage prevention is practically achieved. The bolt hydraulic stretcher has the advantages of being free from limitation of space, handy in operation, wide in application range, strong in adaptability, easy to operate, convenient to use, economical, safe and the like.
Description
Technical field
The utility model is applicable to the fields such as petrochemical industry, nuclear power, wind-powered electricity generation, water power, thermoelectricity, boats and ships, railway, Aero-Space, mining, heavy-duty machinery, especially relates to a kind of bolt hydraulic stretcher.
Background technology
in existing technology, bolt hydraulic stretcher is called for short hydraulic elongator, the hydraulic power source that it provides by hydraulic coupling booster (superpressure oil pump), tensile strength according to material, yield factor and percentage elongation determine tensile force, the expansion force of utilizing superpressure oil pump to produce, the bolt of the power of being applied in is elongated in its elastic deformation area, diameter of bolt slight deformation, thereby nut is easy to easily, also can be used as in addition the device that hydraulic pressure excessively full connection applies axial force, push up to press and install, the stretcher maximum a bit can make and the dismounting fastening by definite value simultaneously of a plurality of bolts, cloth power is even, a safety, efficiently, instrument is fastening and the optimal path of the bolt of dismounting all size efficiently.
Hydraulic bolt tightening device is comprised of three departments: high-pressure oil pump, fluid-pressure transmission sebific duct and hydraulic elongator.Hydraulic elongator is a department of bolt fastening device.
Summary of the invention
Problem to be solved in the utility model is to provide a kind of bolt hydraulic stretcher, especially is fit to the stretching of various bolts.
For solving the problems of the technologies described above, the technical solution adopted in the utility model is: a kind of bolt hydraulic stretcher, comprise support ring, cylinder body, piston and pipe joint, described support ring one end is connected with cylinder body, be provided with piston in cylinder body, described piston bottom is connected with cylinder body by the first black box, and described piston top is passed through the second black box and is connected with cylinder body, and described piston and cylinder body centre are provided with pipe joint.
Advantage and the good effect that the utlity model has are: owing to adopting technique scheme, stretching mode is not subjected to the impact of bolt lubricant effect and screw thread friction size, can obtain more accurate bolt load; Can carry out synchro-draw to a plurality of bolts, make whole circle bolt strained evenly, obtain balanced load; Owing to adopting state-of-the-art superhigh pressure technique, can complete the dismounting of bolt in very little space; Bolt is carried out the fastening surplus load that obtains to stretching mode and payload wants the torque gradient mode larger; Stretching mode more is applicable to the higher joint applications of fastening required precision, and it can make stressed the realization equably of flange engage, veritably Leakage prevention; Be not subjected to spatial constraints, it is handy to operate, and the scope of application is wide, adaptation is strong, simple to operate, easy to use, the advantages such as economic security.
Description of drawings
Fig. 1 is structural representation of the present utility model.
In figure:
1, support ring 2, the first black box 3, cylinder body
4, piston 5, the second black box 6, pipe joint
The specific embodiment
As shown in Figure 1, a kind of bolt hydraulic stretcher of the utility model, comprise support ring 1, cylinder body 3, piston 4 and pipe joint 6, described support ring 1 one ends are connected with cylinder body 3, be provided with piston 4 in cylinder body 3, described piston 4 bottoms are connected with cylinder body 3 by the first black box 2, and described piston 4 tops are connected with cylinder body 3 by the second black box 5, and described piston 4 and cylinder body 3 centres are provided with pipe joint 6.
The course of work of this example: hydraulic bolt tightening device is comprised of three departments: high-pressure oil pump, fluid-pressure transmission sebific duct and hydraulic elongator.Hydraulic elongator is a department of bolt fastening device.
Hydraulic bolt tightening device is the oil pressure that is produced by high-pressure oil pump, be sent to by the fluid-pressure transmission pipe on 4, the piston of hydraulic elongator, act on mutually and with bolt tension by the locking nut on hydraulic elongator and the bolt that need tighten, then stir pole with the nut screwing clamping of container, thereby reach the purpose of bolting on after pressure release.The process of tightening will be undertaken by the delimitation program under different oil pressure.
The position of stretcher construction bolt axis is used for bolt is carried out axial tension, realize the amount of tension that bolt needs, and this amount of tension of bolt has determined the clamping force that bolted is required just.When bolt is subject to stretching, nut can come with the flange contact facings disengaging, there is an opening hydraulic elongator lower end, for the artificial rotating nut of operating personnel, the rotation of nut is to dial rod by a metal to stir one group of outer (or directly stirring round nut) that circle is realized of hex nut usually.After laying down the oil pressure in hydraulic elongator, nut and composition surface are close to, thereby the axial deformation of bolt is pinned, and namely remaining bolt load are locked in nut.
Proportional to load and the oil pressure in hydraulic cylinder that bolt applies, payload can be very accurately kept in such design here; Because load is applied directly on bolt, and all active forces all are used for bolt lengthening, so load produces required space and can reach minimum.
Above an embodiment of the present utility model is had been described in detail, but described content is only preferred embodiment of the present utility model, can not be considered to be used to limiting practical range of the present utility model.All equalizations of doing according to the utility model application range change and improve etc., within all should still belonging to patent covering scope of the present utility model.
Claims (1)
1. bolt hydraulic stretcher, it is characterized in that: comprise support ring, cylinder body, piston and pipe joint, described support ring one end is connected with cylinder body, be provided with piston in cylinder body, described piston bottom is connected with cylinder body by the first black box, described piston top is connected with cylinder body by the second black box, is provided with pipe joint in the middle of described piston and cylinder body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220742595 CN203003462U (en) | 2012-12-28 | 2012-12-28 | Bolt hydraulic stretcher |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220742595 CN203003462U (en) | 2012-12-28 | 2012-12-28 | Bolt hydraulic stretcher |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203003462U true CN203003462U (en) | 2013-06-19 |
Family
ID=48595095
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220742595 Expired - Fee Related CN203003462U (en) | 2012-12-28 | 2012-12-28 | Bolt hydraulic stretcher |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203003462U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113635038A (en) * | 2021-09-01 | 2021-11-12 | 中国船舶重工集团海装风电股份有限公司 | Synchronous pressing device for expansion sleeve and installation method of expansion sleeve |
-
2012
- 2012-12-28 CN CN 201220742595 patent/CN203003462U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113635038A (en) * | 2021-09-01 | 2021-11-12 | 中国船舶重工集团海装风电股份有限公司 | Synchronous pressing device for expansion sleeve and installation method of expansion sleeve |
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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: 20130619 Termination date: 20131228 |