CN2038964U - Pre-tightened bolt tension device - Google Patents
Pre-tightened bolt tension device Download PDFInfo
- Publication number
- CN2038964U CN2038964U CN 88212228 CN88212228U CN2038964U CN 2038964 U CN2038964 U CN 2038964U CN 88212228 CN88212228 CN 88212228 CN 88212228 U CN88212228 U CN 88212228U CN 2038964 U CN2038964 U CN 2038964U
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- China
- Prior art keywords
- piston
- bolt
- nut
- cylinder body
- cylinder
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Abstract
The utility model relates to a pre-tightened bolt tension device, comprising a cylinder body, a piston, a rotary sleeve barrel, a tightening wrench, a dynamometer, etc. The oil cylinder is a prolate columnar-shaped which has the features of big pressure bearing area and narrow slot-shaped working position adaptability. A bevel gear which is arranged in the inner of the cylinder body can drive the rotary sleeve barrel to rotate, so the convenient and flexible function can be realized. The tightening wrench is a spring friction slice type force moment mechanism. When the utility model is used, the hydraulic pressure is used to impulse the piston to generate tensile force, and the numerical value is shown on the dynamometer; when the technique require is achieved, the oil pump stops working, the pre-stressing bolt is in an elastic deformation state, by clasping the wrench and screwing the nut, the pre-tightened effect can be realized.
Description
The utility model relates to the stretching tool of pre-stressed bolt.
Some at a high speed or the machine of heavy duty require driving parts with Bolt Connection, must pretension, its method has following several: 1, conventional machinery method: with common wrench or torque spanner.2, adopt hydraulic spanner.3, use the heating pretension: flame heating, steam heating, electric heating etc.4, Hydraulic Pretension Method: utilize hydraulic coupling to pass through a kind of extender, with bolt tension, under the situation that does not have load, fastening nut.
Preceding two kinds of methods make bolt elongate by the slope of thread friction slip, and screw thread is subjected to tensile stress and shearing force, is only applicable to middle-size and small-size bolt.The 3rd kind of method easily reduces effect with the link heating in heating process.The 4th kind is domestic and international state-of-the-art method.
The DJ500 type of domestic The Second Heavy Machinery Factory design must be holed on the nut of pretension bolt in advance to DJ503 type standard series hydraulic pre-tightening bolt tensioning jack, is wrenched with pin behind the pretension, does not have the nut screwing mechanism, uses inconvenience; Adopt annular cylinder and annular plunger, bearing area is little; Little for the pretension working position, require the big pretension bolt of tensile force, tensile force deficiency; For some the bolt of special technical requirement or specific installation position is arranged, use not ideal enough.
The Austria VOEST-ALPINE of Steel Complex installs the hydraulic pre-tightening bolt tensioning jack that provides for Taiyuan steel mill casting machine, has external gear transmission nut screwing mechanism, is assemblied in outside the cylinder body.Adopt multilayer ring oil cylinder for improving tensile force, the pressure that high-pressure oil pipe bears is big.
The purpose of this utility model, be to avoid the above deficiency in the prior art, and provide a kind of have in dress bevel gear drive nut screwing mechanism, can adopt and bear the lower high-pressure oil pipe of pressure, be applicable to that the pretension working position is little, require the pretension bolt extender of the big bolt of tensile force.
The structure of this pretension bolt extender such as accompanying drawing, Fig. 1 are main sectional view of the present utility model, and Fig. 2 is the A-A sectional drawing, and Fig. 3 is the B-B sectional drawing, and Fig. 4 is a C portion enlarged view.
The utility model is by cylinder body 1, turnbarrel 2, stretching nut 3, piston rod 4, axle sleeve 5, cover plate 6, conelet gear 7, pad 8, cover 9, sealing ring 10,11,12, piston 13, end cap 14, clamping bolt 15, pulling force table 16, high-pressure oil pipe 17, spring friction plate 18, square set 19, connects the compositions such as bolt and nut 20. Oil cylinder and piston adopt prolate cylindrical, and its cross section such as Fig. 2 to increase bearing area, reduce the pressure of high-pressure oil pipe. Stretching nut 3 has internal thread, profile is the garden cylinder, piston rod 4 is tightened to one with stretching nut 3, the top of piston rod 4 is passed the upper end centre bore of turnbarrel 2, cavity and the cylinder body between the oil cylinder, piston 13 and the end cap 14 of installation turnbarrel from the bottom to top successively, piston rod has a boss after passing piston 13, so that pump-in pressure oil to oil cylinder, piston 13 withstands boss when upwards moving, make piston rod 4 with upwards motion of piston, produce pulling force. Piston rod passes end cap 14 and stretches out the outer end of stretcher and make square, is used for applying rotation power with spanner. All adopt movingly between piston rod and cylinder body, the piston, by sealing ring 10,11 sealings. Between piston rod and stretching nut 3 and the turnbarrel 2 for freely to cooperate, so that piston rod and stretching nut 3 are at its intercropping rotary lifting movement. Seal with sealing ring 12 between piston and the oil cylinder.
Dress bevel gear drive structure in this extender adopts.Turnbarrel 2 outsides are garden shape, place pretension bolt extender inferior part of the cylinder block center cavity, and rotatable, its underpart is interior Hexagonal jacket, and the upper end is a bevel gear, with bevel pinion 7 engagements.Bevel pinion 7 laterally is installed in the axle sleeve 5 of cylinder side wall, bevel pinion 7 is near the outer end of cylinder body, fastening stage casing is the attachment bolt 20 of polished rod, it passes the center hole of spring friction plate 18 and side's cover 19, with the nut side of the compressing cover 19 of attachment bolt 20, constitute spring friction disk type moment structure.Bevel pinion 7, spring friction plate 18, side's cover 19, that adjusts that the coupling bolt of moment and nut 20 constitute the pretension bolt extenders screws spanner mechanism, this screws spanner mechanism and can produce and be bordering on constant moment, its moment size can be tightened the nut of pretension bolt easily by the nut adjustment of coupling bolt 20.High-pressure oil pipe 17 is connected with cylinder body 1 usefulness compression fittings, and the oil pipe the other end and high pressure oil pump join, and And communicates with the draw-bar donamometer 16 that is formed by pressure gauge repacking dial plate.
During work, turnbarrel 2 with this extender is enclosed within on the nut of pretension bolt earlier, rotating piston bar 4, the helical thread portion that stretching nut 3 and pre-stressed bolt are stretched out is connected, piston 13 is in extreme lower position, during stretching, drive high pressure oil pump, pressure oil injects oil cylinder, because seal ring 10,11,12 sealings, pressure oil promotion piston 13 moves upward and withstands the boss of piston rod 4, piston rod 4 and stretching nut 3 are moved upward with piston, produce pulling force, pre-stressed bolt is stretched, its pulling force numerical value is presented on the dial plate of draw-bar donamometer 16, directly reads the tonnage number of pulling force.When reaching the numerical value of technical requirements, stop oil pump work, this moment, pre-stressed bolt was in elastic deformation, and rotation side's cover 19 is because the active force of spring friction plate 18 makes bevel pinion 7 driven rotary sleeves 2 rotation, fastening nuts easily.The resistance that the nut that is tightened produces, react on bevel pinion by turnbarrel 2, when resistance during greater than the rotating force of the constant force square of setting up by the nut of attachment bolt 20, bevel pinion 7 stops operating, spring friction plate 18 slides between side's cover 19 and bevel pinion 7, at this moment, be the nut of having tightened pretension bolt with the constant force square rotating force of setting up.After treating the high pressure oil pump release, reverse piston rod 4, remove extender, promptly reach desired pretension function.
Characteristics of the present utility model: 1, adopt cylindrical oil cylinder of prolate and piston, make that to bear pulling force big and the pressure of oil pipe is lower, be suitable for homemade high-pressure oil pipe.2, can carry out work in narrow installation position.3, little, the manoeuvrable of volume, move conveniently.
Embodiment:
Use maximum pull 45t, piston range 10mm, supporting oil pump 700kg/cm
2The pretension bolt extender, at casting machine ladle turret installation position bulk groove width 90mm, carry out work under the occasion of groove depth 300mm, pre-stressed bolt M33 * 3.5, pulling force 40t, oil pressure 463kg/cm
2, the about 1mm of bolt elongate amount.Respond well.
Claims (1)
- A kind of pretension bolt extender, it is made up of cylinder body, oil cylinder, piston, piston rod, stretching nut, nut screwing mechanism, it is characterized in that:1, oil cylinder, piston adopt prolate garden cylindricality, adopt movingly between piston and the piston rod, are sealed by seal ring;2, the turnbarrel of nut screwing mechanism adopts bevel gear drive, is installed in the cylinder body, and the bottom of turnbarrel is interior Hexagonal jacket, and the upper end is a bevel gear, bevel gear and the bevel pinion engagement that laterally is installed in the cylinder side wall axle sleeve;3, screw spanner mechanism and adopt spring friction disk type moment structure, bevel pinion is near the outer end of cylinder body, fastening stage casing is the attachment bolt of polished rod, it passes the center hole of spring friction plate and side's cover, with the nut side of the compressing cover of attachment bolt, constitute by what the nut of adjusting attachment bolt can obtain to be bordering on constant moment and screw spanner mechanism;4, be provided with the demonstration bolt and bear the draw-bar donamometer of pulling force size.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 88212228 CN2038964U (en) | 1988-03-03 | 1988-03-03 | Pre-tightened bolt tension device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 88212228 CN2038964U (en) | 1988-03-03 | 1988-03-03 | Pre-tightened bolt tension device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2038964U true CN2038964U (en) | 1989-06-07 |
Family
ID=4845553
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 88212228 Withdrawn CN2038964U (en) | 1988-03-03 | 1988-03-03 | Pre-tightened bolt tension device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2038964U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102229042A (en) * | 2011-04-01 | 2011-11-02 | 上海电气核电设备有限公司 | Bolt assembly process for evaporator sealed cover plate in hydrostatic test |
| CN105750897A (en) * | 2016-05-05 | 2016-07-13 | 哈尔滨工程大学 | Automatic nut tightening and returning mechanism with bolt stretching machine |
| CN109596430A (en) * | 2018-10-19 | 2019-04-09 | 中国科学院地质与地球物理研究所 | Heavy-loaded precision turntable |
| CN110259597A (en) * | 2019-06-21 | 2019-09-20 | 钟建斌 | A kind of new Joining Structure between valve mechanism cover and cylinder head |
-
1988
- 1988-03-03 CN CN 88212228 patent/CN2038964U/en not_active Withdrawn
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102229042A (en) * | 2011-04-01 | 2011-11-02 | 上海电气核电设备有限公司 | Bolt assembly process for evaporator sealed cover plate in hydrostatic test |
| CN102229042B (en) * | 2011-04-01 | 2013-01-30 | 上海电气核电设备有限公司 | Bolt assembly process for evaporator sealed cover plate in hydrostatic test |
| CN105750897A (en) * | 2016-05-05 | 2016-07-13 | 哈尔滨工程大学 | Automatic nut tightening and returning mechanism with bolt stretching machine |
| CN109596430A (en) * | 2018-10-19 | 2019-04-09 | 中国科学院地质与地球物理研究所 | Heavy-loaded precision turntable |
| CN110259597A (en) * | 2019-06-21 | 2019-09-20 | 钟建斌 | A kind of new Joining Structure between valve mechanism cover and cylinder head |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |