CN2900092Y - Serial hydraulic stretcher - Google Patents
Serial hydraulic stretcher Download PDFInfo
- Publication number
- CN2900092Y CN2900092Y CN 200520041820 CN200520041820U CN2900092Y CN 2900092 Y CN2900092 Y CN 2900092Y CN 200520041820 CN200520041820 CN 200520041820 CN 200520041820 U CN200520041820 U CN 200520041820U CN 2900092 Y CN2900092 Y CN 2900092Y
- Authority
- CN
- China
- Prior art keywords
- hydraulic
- piston
- hydraulic cylinder
- nut
- series connection
- 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 relates to a hydraulic elongator in series connection, which comprises at least a nut sleeve, a supporting sleeve and a pull rod with the nut sleeve. A hydraulic cylinder is positioned on the supporting sleeve; a piston is positioned inside the hydraulic cylinder. The utility model is characterized in that: a secondary hydraulic cylinder is arranged on the hydraulic cylinder in series connection; a secondary piston is connected to the piston. When the supporting sleeve of the utility model is positioned on the workpiece that is fixed fast, the two hydraulic cylinders in series connection are positioned on the supporting sleeve, the pull rod with nut sleeve is positioned on the elongated bolt and is turned fast, and then the nut will be turned fast via a spanner. The two hydraulic cylinders are arranged in series connection, after the high pressure oil is fed into the two cylinders, the pressure of them would actuate the thrust produced by the two pistons onto the nut, then the bolt can be elongated via the pull rod and the tensile force equals the sum of the thrust produced by the two pistons. The utility model, which can be assembled and disassembled conveniently, can enhance the tensile force with the adoption of series connection under the condition of not changing the pressure of feeding oil and the radial diameter.
Description
Technical field
The utility model relates to a kind of hydraulic tensioning device, especially can reach the tandem hydraulic elongator of big tensile force.
Background technology
Known hydraulic elongator all is made up of a working solution cylinder pressure at present, and its tensile force is limited, and bigger if desired tensile force just need be selected the hydraulic pump or the bigger stretcher of structure of pressure greatly for use, and this just makes troubles to design and use.
Increase the hydraulic cylinder area and can increase tensile force, but will increase radial dimension like this, be subjected to the service condition restriction; Increasing charge oil pressure needs the ultrahigh-pressure hydraulic pump, and the hermetically-sealed construction of hydraulic cylinder will become flexible when pressure is excessive, transmits the liquid of pressure and will reveal.
Summary of the invention
The purpose of this utility model is to overcome the deficiencies in the prior art, present widely used hydraulic elongator is transformed, propose a kind of tandem hydraulic elongator, this stretcher can increase tensile force not changing charge oil pressure and do not increase under the situation of radial dimension.
The technical solution of the utility model is: a kind of tandem hydraulic elongator, which comprises at least nut sleeve, splicing sleeve, band nut sleeve pull bar, hydraulic cylinder is installed on the splicing sleeve, be provided with piston in the hydraulic cylinder, it is characterized in that also connecting on the described hydraulic cylinder is mounted with second hydraulic cylinder, and described piston also is connected with second piston.
By above feature, support set is connected with connected piece, and the pull bar of band nut sleeve is connected with the bolt that is stretched, and cylinder body is connected with support set, and the cylinder body of hydraulic cylinder is connected with second hydraulic cylinder body, forms series component.Piston is connected with second piston, forms another series component.Spanner is used for screwing nut.
One end of high-voltage tube is connected electrodynamic pump, and the other end is connected distributor.High-pressure hose one end connects the hydraulic cylinder of two polyphones respectively, and the other end is connected with stop valve.Start high-pressure pump, hydraulic oil enters in two hydraulic cylinders, and the piston of two series connection together moves up, the pull bar bolt tension that will be stretched by the band nut sleeve, tensile force is the pressure sum that two hydraulic cylinders produce, thereby has realized increasing the purpose of tensile force, promptly is the twice of single cylinder pulling force.Thereby tighten the purpose that the nut that is installed on the bolt that is stretched is realized pretension by the rotation nut sleeve.Use moving rod reverse rotation nut, two pistons of connecting of stretcher can be returned to reset condition.
Using uniform pressure oil and not increasing under the situation of radial dimension, adopt the hydraulic cylinder of series-mode frame can increase tensile force exponentially.Both but tandem compound used and also can use separately, and was simple in structure, easy to use.This stretcher can increase tensile force not changing charge oil pressure and do not increase under the situation of radial dimension.
Description of drawings
Fig. 1 is the structural representation of the utility model tandem hydraulic elongator;
Fig. 2 is the hydraulic tensioning system schematic.
Among the figure, 1, nut sleeve, 2, splicing sleeve, 3, band nut sleeve pull bar, 4, hydraulic cylinder, 4 ', second hydraulic cylinder, 5, piston, 5 ', second piston, 6, nut, 7, spanner, 8, the bolt that is stretched, 9, be installed in the nut on the bolt that is stretched, 21, electrodynamic pump, 22, high-voltage tube, 23, distributor, 24, stop valve, 25, high-pressure hose, 26, hydraulic elongator.
The specific embodiment
Further structure of the present utility model and function are explained below in conjunction with drawings and Examples:
As shown in Figure 1, when described tandem hydraulic elongator was in running order, support set 2 was installed on the connected piece (figure does not show), the pull bar 3 of band nut sleeve is installed on the bolt 8 that is stretched, cylinder body 4 is placed on the support set 2, second cylinder body 4 ' be placed on the cylinder body 4, i.e. and series connection is placed.Piston 5 and second piston 5 ' contact, also be series connection.At two groups of sealing rings of cylinder body 4 and piston 5, the second cylinder bodies 4 ' and second piston 5 ' install respectively.Screw nut 6 with spanner 7.Make two pistons be in original state.Consult Fig. 2 simultaneously, an end of high-voltage tube 22 is connected electrodynamic pump 21, and the other end is connected distributor 23.High-pressure hose 25 1 ends be connected to cylinder body 4 and second cylinder body 4 ' on, the other end is connected with stop valve 24.Start high-pressure pump, hydraulic oil enters in two hydraulic cylinders, and the piston 5 and second piston 5 ' move up, the pull bar 3 by nut 6 and the band nut sleeve bolt 8 that will be stretched stretches.Thereby realize the purpose of pretension by rotation nut sleeve 1 fastening nut 9.Use moving rod 7 oppositely to screw nut 6, can be with the piston 5 of stretcher and second piston 5 ' return to reset condition.
Claims (2)
1, a kind of tandem hydraulic elongator, which comprises at least nut sleeve, splicing sleeve, band nut sleeve pull bar, hydraulic cylinder is installed on the splicing sleeve, be provided with piston in the hydraulic cylinder, it is characterized in that also connecting on the described hydraulic cylinder is mounted with second hydraulic cylinder, and described piston also is connected with second piston.
2, tandem hydraulic elongator according to claim 1 is characterized in that: described two series cylinders are connected to high-pressure hose respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520041820 CN2900092Y (en) | 2005-05-24 | 2005-05-24 | Serial hydraulic stretcher |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520041820 CN2900092Y (en) | 2005-05-24 | 2005-05-24 | Serial hydraulic stretcher |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2900092Y true CN2900092Y (en) | 2007-05-16 |
Family
ID=38084258
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520041820 Expired - Fee Related CN2900092Y (en) | 2005-05-24 | 2005-05-24 | Serial hydraulic stretcher |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2900092Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107717429A (en) * | 2017-11-09 | 2018-02-23 | 大连泰凯工业有限公司 | Multistage super-pressure thin-walled hydraulic elongator for hub of wind power generator kingbolt |
| CN108406677A (en) * | 2018-04-10 | 2018-08-17 | 北京卫星环境工程研究所 | 4 synchronous hydraulic loading devices of spacecraft launching site |
| CN110695672A (en) * | 2019-11-14 | 2020-01-17 | 四川腾菲克科技有限公司 | Bolt fastening method and bolt fastening system |
| CN116117497A (en) * | 2023-01-10 | 2023-05-16 | 中国神华煤制油化工有限公司 | Mounting and dismounting device for bolts |
-
2005
- 2005-05-24 CN CN 200520041820 patent/CN2900092Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107717429A (en) * | 2017-11-09 | 2018-02-23 | 大连泰凯工业有限公司 | Multistage super-pressure thin-walled hydraulic elongator for hub of wind power generator kingbolt |
| CN108406677A (en) * | 2018-04-10 | 2018-08-17 | 北京卫星环境工程研究所 | 4 synchronous hydraulic loading devices of spacecraft launching site |
| CN110695672A (en) * | 2019-11-14 | 2020-01-17 | 四川腾菲克科技有限公司 | Bolt fastening method and bolt fastening system |
| CN116117497A (en) * | 2023-01-10 | 2023-05-16 | 中国神华煤制油化工有限公司 | Mounting and dismounting device for bolts |
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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: 20070516 Termination date: 20110524 |