CN104551632A - Single-stage high-type bolt tensioner - Google Patents
Single-stage high-type bolt tensioner Download PDFInfo
- Publication number
- CN104551632A CN104551632A CN201410756603.4A CN201410756603A CN104551632A CN 104551632 A CN104551632 A CN 104551632A CN 201410756603 A CN201410756603 A CN 201410756603A CN 104551632 A CN104551632 A CN 104551632A
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- CN
- China
- Prior art keywords
- piston
- cylinder body
- wall
- type bolt
- pull rod
- 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.)
- Pending
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P19/00—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes
- B23P19/04—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes for assembling or disassembling parts
- B23P19/06—Screw or nut setting or loosening machines
- B23P19/067—Bolt tensioners
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Hand Tools For Fitting Together And Separating, Or Other Hand Tools (AREA)
Abstract
The invention discloses a single-stage high-type bolt tensioner. The single-stage high-type bolt tensioner comprises a supporting sleeve, wherein an oil cylinder body is mounted at top of the supporting sleeve in a fixed manner, a hole shaped like an inverted Chinese character tu is formed in the oil cylinder body, and is provided with a piston in a sliding manner, a hydraulic chamber is formed between a face in the middle part of the piston and a face in the middle of inner part of the oil cylinder body, the center of the piston is hollow, and is provided with a pull rod, screw threads are formed on an outer wall of the pull rod, and are matched with a locking nut in a screwed manner, a lower end of the locking nut is connected in an annular groove between the piston and the pull rod in a clamping manner, openings at upper ends of the piston and the oil cylinder body are sealed by annular cover plates, an another annular groove is formed in an outer wall of a lower end of the pull rod, and a poking sleeve is mounted through the annular groove, and a plurality of poking holes are formed in an outer wall of the poking sleeve. According to the single-stage short-type bolt tensioner provided in the invention, the pull rod is mounted individually, and different pull rods and poking sleeves are provided for pre-tensioning bolts of different specifications, therefore pre-tension for bolts of a plurality of specifications can be realized; as the separate piston is employed, the single-stage short-type bolt tensioner also has the advantages of saved materials, lower cost, simple operation, convenience for maintenance, high working pressure, smaller size and wide application range.
Description
technical field:
The present invention relates to stretcher field, particularly a kind of single-stage high type bolt tensioning jack.
background technology:
Bolt hydraulic stretcher is called for short bolt tensioning jack, the hydraulic power source that it provides by fluid power booster (superpressure oil pump), tensile force is determined according to the tensile strength of material, yield factor and percentage elongation, utilize the expansion force that superpressure oil pump produces, the bolt of the power that is applied in is elongated in its elastic deformation area, diameter of bolt slight deformation, thus makes nut be easy to loosening, also can apply the device of axial force in addition as hydraulic pressure excessively full connection, carry out top pressure and install.The maximum advantage of stretcher can make and the dismounting fastening by definite value simultaneously of multiple bolt, and cloth power is even, be a safety, efficiently, efficiently instrument be fastening and the optimal path of the bolt of dismounting all size.Be applied 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.According to different operating mode application conditions and user's requirement, the design of special stretcher can be done.
summary of the invention:
The object of the invention is to solve the deficiencies in the prior art, provide the single-stage high type bolt tensioning jack that a kind of structural design is more reasonable, ingenious, easy to use.
The technical solution used in the present invention is:
Single-stage high type bolt tensioning jack, comprise support set, it is characterized in that: described support set top is installed with cylinder body, have inverted " convex " font hole in cylinder body and be slidably fitted with piston, the table top of the table top in the middle part of piston and cylinder body bosom forms hydraulic cavities, the central hollow of piston is also provided with pull bar, pull bar outer wall is provided with screw thread and is screwed with locking nut, the lower end of locking nut is connected in the cannelure between piston and pull bar, the upper end oral area of piston and cylinder body is by annular cover plate for sealing, the outer wall of cylinder body is provided with installing hole, the bottom of installing hole is provided with pipeline communication in described hydraulic cavities, the lower end outer wall of described pull bar is provided with cannelure and is provided with pulling sleeve by cannelure, and the outer wall of pulling sleeve has some pulling holes.
Described single-stage high type bolt tensioning jack, is characterized in that: described piston is slidably fitted with in cylinder body, and both contact surface sidewalls are equipped with annular seal groove.
Compared with prior art, beneficial effect of the present invention is:
Pull bar of the present invention is installed separately, same stretcher can be equipped with different pull bars and pulling sleeve, for the tools for bolts ' pretension of different size, operating personnel are having the tools for bolts ' pretension of plurality of specifications on-the-spot, only need carry pull bar and the pulling sleeve of a stretcher and dimension, just can realize the tools for bolts ' pretension of many specifications; Piston pattern saves material, less expense; Simple to operate, easy to maintenance; Operating pressure is high, small volume, and applying working condition scope is wide; Adopt high strength alloy steel 42CrMo, improve security and the life-span of product; Can according to customer requirement amount body making etc.
accompanying drawing illustrates:
Fig. 1 is structural representation of the present invention.
detailed description of the invention:
Below in conjunction with accompanying drawing, by embodiment, the present invention is described in further detail:
Single-stage high type bolt tensioning jack, comprise support set 6, support set 6 top is installed with cylinder body 5, have inverted " convex " font hole in cylinder body 5 and be slidably fitted with piston 4, the table top of the table top in the middle part of piston 4 and cylinder body 5 bosom forms hydraulic cavities, the central hollow of piston 4 is also provided with pull bar 1, pull bar 1 outer wall is provided with screw thread and is screwed with locking nut 2, the lower end of locking nut 2 is connected in the cannelure between piston 4 and pull bar 1, the upper end oral area of piston 4 and cylinder body 5 is sealed by the cover plate 3 of annular, the outer wall of cylinder body 5 is provided with installing hole, the bottom of installing hole is provided with pipeline communication in hydraulic cavities, the lower end outer wall of pull bar 1 is provided with cannelure and is provided with pulling sleeve 7 by cannelure, and the outer wall of pulling sleeve 7 has some pulling holes, and piston 4 is slidably fitted with in cylinder body 5, and both contact surface sidewalls are equipped with annular seal groove.
Operation uses, operation principle:
A. support set 6 is enclosed within nut, ensures supporting surface and the bolt axes normal of support set 6, support set axis and bolt axis coaxle;
B. cylinder body 5 and pull bar 1 are placed on support set 6, use driving lever 8 dextrorotation pull bar 1, pull bar 1 is screwed on bolt completely, then uses driving lever 8, screw locking nut 2;
C. after hydraulic elongator and pumping plant (manual pump or electrodynamic pump) being connected with high-pressure rubber pipe, relief lever on locking pumping plant, operation depression bar, observes gauge hand simultaneously, when gauge hand points to required pressure, unclamp depression bar, rotating pulling sleeve 7(with driving lever 8 is clockwise locking nut, be counterclockwise loosening nut), and by peep hole observation bolt and supporting surface whether joint close, can unscrew relief lever after joint close, now bolt has reached predetermined pretensioning effect;
If d. stretcher has reached range (namely seeing thin red line), stop upper pressure immediately, pulling sleeve 7 is rotated with driving lever 8, after making nut and supporting surface joint close, unscrew the relief lever on pumping plant, then use the pulling hole of driving lever 8 rotating rod 1, after pull bar 1 screws, screw relief lever downwards, repeat step c, until pump station pressure reaches required pressure;
E. after bolt reaches pretension requirement, unscrew the relief lever on pumping plant, can stretcher be taken off;
F. operation principle: the effect of power is mutual and yield deformation.
Above-described embodiment is only preferably embodiment of the present invention, and in addition, the present invention can also have other implementations.It should be noted that, under the prerequisite not departing from the present invention's design, any apparent improvement and modification all should fall within protection scope of the present invention.
Claims (2)
1. single-stage high type bolt tensioning jack, comprise support set, it is characterized in that: described support set top is installed with cylinder body, have inverted " convex " font hole in cylinder body and be slidably fitted with piston, the table top of the table top in the middle part of piston and cylinder body bosom forms hydraulic cavities, the central hollow of piston is also provided with pull bar, pull bar outer wall is provided with screw thread and is screwed with locking nut, the lower end of locking nut is connected in the cannelure between piston and pull bar, the upper end oral area of piston and cylinder body is by annular cover plate for sealing, the outer wall of cylinder body is provided with installing hole, the bottom of installing hole is provided with pipeline communication in described hydraulic cavities, the lower end outer wall of described pull bar is provided with cannelure and is provided with pulling sleeve by cannelure, and the outer wall of pulling sleeve has some pulling holes.
2. single-stage high type bolt tensioning jack according to claim 1, is characterized in that: described piston is slidably fitted with in cylinder body, and both contact surface sidewalls are equipped with annular seal groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410756603.4A CN104551632A (en) | 2014-12-10 | 2014-12-10 | Single-stage high-type bolt tensioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410756603.4A CN104551632A (en) | 2014-12-10 | 2014-12-10 | Single-stage high-type bolt tensioner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104551632A true CN104551632A (en) | 2015-04-29 |
Family
ID=53069263
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410756603.4A Pending CN104551632A (en) | 2014-12-10 | 2014-12-10 | Single-stage high-type bolt tensioner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104551632A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87202153U (en) * | 1987-02-21 | 1988-01-06 | 李世伦 | Hydraulic stretching bolt screwing device |
| US5702139A (en) * | 1995-10-13 | 1997-12-30 | Buck; David A. | Back-up power tongs |
| CN201677169U (en) * | 2010-05-20 | 2010-12-22 | 海泰斯（北京）工程设备有限公司 | Novel undersea hydraulic bolt stretcher |
| CN103203622A (en) * | 2013-03-25 | 2013-07-17 | 青岛山海科技有限公司 | Hydraulic bolt tensioning jack |
| CN204366393U (en) * | 2014-12-10 | 2015-06-03 | 马鞍山市益华液压机具有限公司 | Single-stage high type bolt tensioning jack |
-
2014
- 2014-12-10 CN CN201410756603.4A patent/CN104551632A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87202153U (en) * | 1987-02-21 | 1988-01-06 | 李世伦 | Hydraulic stretching bolt screwing device |
| US5702139A (en) * | 1995-10-13 | 1997-12-30 | Buck; David A. | Back-up power tongs |
| CN201677169U (en) * | 2010-05-20 | 2010-12-22 | 海泰斯（北京）工程设备有限公司 | Novel undersea hydraulic bolt stretcher |
| CN103203622A (en) * | 2013-03-25 | 2013-07-17 | 青岛山海科技有限公司 | Hydraulic bolt tensioning jack |
| CN204366393U (en) * | 2014-12-10 | 2015-06-03 | 马鞍山市益华液压机具有限公司 | Single-stage high type bolt tensioning jack |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150429 |