CN107339310A - A kind of intelligent fastener - Google Patents
A kind of intelligent fastener Download PDFInfo
- Publication number
- CN107339310A CN107339310A CN201710528059.1A CN201710528059A CN107339310A CN 107339310 A CN107339310 A CN 107339310A CN 201710528059 A CN201710528059 A CN 201710528059A CN 107339310 A CN107339310 A CN 107339310A
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- CN
- China
- Prior art keywords
- measurement bar
- high precision
- axial
- stretching measurement
- measuring unit
- 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.)
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Links
- 238000005259 measurement Methods 0.000 claims abstract description 32
- 238000006073 displacement reaction Methods 0.000 claims abstract description 21
- 239000003292 glue Substances 0.000 claims description 3
- 238000000034 method Methods 0.000 description 13
- 239000000463 material Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000012544 monitoring process Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000013475 authorization Methods 0.000 description 1
- 238000000205 computational method Methods 0.000 description 1
- 238000009795 derivation Methods 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000003550 marker Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B35/00—Screw-bolts; Stay-bolts; Screw-threaded studs; Screws; Set screws
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
- G01L5/24—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for determining value of torque or twisting moment for tightening a nut or other member which is similarly stressed
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
Abstract
The invention discloses a kind of intelligent fastener; including bolt body; the head of bolt body is provided with axial hole; a stretching measurement bar is fixed with axial hole; the head of bolt body is additionally provided with protection cap; protection cap is internally provided with the high precision position measuring unit of the axial displacement for sensing stretching measurement bar, and high precision position measuring unit has the wired or wireless signal emission module corresponding with exogenous data receiving terminal.The intelligent fastener of the present invention can measure the axial displacement of stretching measurement bar by high precision position measuring unit, and then extrapolate pretightning force, have the advantages of high precision, result data compared with the pre-tight stress indicating bolt of prior art.
Description
Technical field
The present invention relates to fastener areas, more particularly to a kind of intelligent fastener.
Background technology
Because the needs in production operation and manufacture, installation, maintenance, the convenience transported, container are often made detachably
Structure, flange connection be most common Detachable connection structure.Flange connects the requirement except meeting strength of flange, rigidity
Outside, also to ensure not reveal between operation operating mode lower flange face.Flange connection relies on bolt presses flange, so as to pad
Piece, which compresses, reaches sealing effectiveness.So to be applied to the great pretightning force of bolt in advance meets that requirements above has quite to flange
Important effect.
At present, controlling the method for bolt pretightening has：Moment method, turn-nut method, hydraulic stretch method.Various method characteristics
It is as follows：
Moment method is to control pretightning force with measuring spanner for force moment, is domestic and international control pretightning force widely used for a long time
Method.Because it by torsion measures pretightning force indirectly, the different coefficient of friction of identical torsion corresponds to different pretightning forces.Institute
+/- more than 25% is reached with its error.
Turn-nut method is that bolt pair is first tightened to " being close to " position, then turns over certain angle, error +/- 15% with
On.It " is close to " the bad judgement in position, has high requirement to the experience of personnel.
Hydraulic stretch method is that pretightning force when using bolt in elastic range controls.Error is +/- more than 10%.And make
Costly with trouble, the requirement to space is high, can only be used in special occasions.
Above method can not all accurately control bolt pretightening very well.
Therefore, there is Chinese patent Authorization Notice No. CN201925305U (authorized announcement date 2011.08.10) to disclose at present
A kind of pre-tight stress indicating bolt, but the bolt can only be that is, logical by the marker color of change compared with Standard colour board
The strain value for crossing bolt determines the size for the pretightning force that bolt is born, and this determination methods error is big, is not suitable for high accuracy
Occasion.
The content of the invention
It is an object of the invention to provide a kind of intelligent fastener, to solve the above problems.
Technical problem solved by the invention can be realized using following technical scheme：
A kind of intelligent fastener, including bolt body, the head of the bolt body is to being provided with axial direction in the middle part of bar portion
Hole, is fixed with a stretching measurement bar in the axial hole, and the head of the bolt body is additionally provided with protection cap, the protection
Lid is internally provided with the high precision position measuring unit of the axial displacement for sensing the stretching measurement bar, the high accuracy
Displacement measurement unit has the wired or wireless signal emission module corresponding with exogenous data receiving terminal.
In a preferred embodiment of the invention, the outer surface of the stretching measurement bar is axially disposed external screw thread,
The axial hole is axial threaded hole, is connected through a screw thread between the stretching measurement bar and the axial threaded hole.
In a preferred embodiment of the invention, the inwall between the outer wall of the stretching measurement bar and the axial hole
Fixed by glue.
In a preferred embodiment of the invention, interference fit is passed through between the stretching measurement bar and the axial hole
It is fixed.
In a preferred embodiment of the invention, the high precision position measuring unit is high accuracy displacement sensor.
As a result of technical scheme as above, intelligent fastener of the invention can pass through high precision position measuring unit
The axial displacement of measurement stretching measurement bar, and then pretightning force is extrapolated, compared with the pre-tight stress indicating bolt of prior art
The advantages of with precision height, result data.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the required accompanying drawing used in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can be with
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is a kind of structural representation of intelligent fastener of the present invention.
Fig. 2 is that a kind of intelligent fastener of the present invention applies the structural representation in monitoring system.
Embodiment
In order that the technical means, the inventive features, the objects and the advantages of the present invention are easy to understand, enter below
One step illustrates the present invention.
A kind of intelligent fastener shown in Figure 1, including bolt body 100, bolt body 100 is from first end to second
End includes thread segment 110, middle part light bar segment 120, head 130 successively.The head 130 of bolt body 100 is to setting in the middle part of bar portion
Axial hole 140 is equipped with, a stretching measurement bar 200 is fixed with axial hole 140.Stretching measurement bar 200 in the present embodiment
Outer surface is axially disposed external screw thread 210, and axial hole 140 is axial threaded hole, stretches measurement bar 210 and axial threaded hole
It is connected through a screw thread between 140.Certainly there is other fixed form between stretching measurement bar 200 and axial hole 140, such as stretch
Inwall between the outer wall and axial hole 140 of measurement bar 200 is fixed by glue；Or stretching measurement bar 200 and axial hole
Fixed between 140 by being interference fitted.
The head of bolt body 100 is additionally provided with protection cap 300, and protection cap 300 is not by possessing the material of signal shielding effect
Material is made, and avoid protection cap 300 is internally formed signal shielding region.Protection cap 300 is internally provided with to be surveyed for sensing stretching
The high precision position measuring unit 400 of the axial displacement of gauge rod 200, high precision position measuring unit 400 have and extraneous number
According to the corresponding wired or wireless signal emission module 410 of receiving terminal.High precision position measuring unit 400 passes for high precision displacement
It sensor, can bought on the market with wired or wireless signal emission module 410, be prior art.
Using the measuring method of the pretightning force of above-mentioned intelligent fastener, comprise the following steps：
1) axial direction of the stretching measurement bar measured by the high precision position measuring unit of such as above-mentioned technical scheme is obtained
Displacement △ L；
2) axial displacement △ L are substituted into equation below：
F=E × A × △ L/L, (1)
Wherein, F is the pretightning force of intelligent fastener, and E is bolt body elasticity modulus of materials, and A is the middle part of bolt body
The radial section product of light bar segment, L is the total length of bolt body, and E, A, L are Fixed constant.
The derivation of above-mentioned formula (1) is as follows：
According to the intrinsic formula of tensile stress：
σ=E × △ L/L (2)
σ=F/A (3)
Wherein, σ is the tensile stress of bolt, and E is bolt body elasticity modulus of materials, and A is the middle part polished rod of bolt body
The radial section product of section, △ L are the axial displacement of the stretching measurement bar measured by high precision position measuring unit, and L is spiral shell
The total length of bolt body, F are the pretightning force of fastener.Formula (1) is can obtain according to formula (2), (3)：
F=E × A × △ L/L, (1)
Because characteristic parameter E, A, L of bolt are Fixed constant, are understood according to formula (1), measure high precision displacement
The axial displacement △ L for the stretching measurement bar that measuring unit measures can just calculate the pretightning force of fastener according to formula (1)
F。
Above-mentioned intelligent fastener can be applied in monitoring system, shown in Figure 2, utilize the pretension of above-mentioned intelligent fastener
The monitoring system of power, including at least one intelligent fastener, data receiver 500, data processor 600 and distal end described above take
Business device 700, data receiver 500 are connected with the wired or wireless signal emission module 410 of high precision position measuring unit 400,
Data are delivered to data processor 600 and handled by data receiver 500, will stretch the axial displacement data of measurement bar 200
The pretightning force of intelligent fastener is converted into, far-end server 700 is delivered to again afterwards and is monitored on-line.Intelligence in the present embodiment
Fastener can be it is multiple, or one.The computational methods of data processor 600 are using a kind of intelligent fastener described above
The measuring method of pretightning force.
In order that alarm of the invention must be sent in real time, the far-end server 700 in the present embodiment also connects with warning device 800
Connect, when the pretightning force that far-end server 700 receives intelligent fastener exceedes pre-set value, warning device 800 sends alarm.
During work, when applying pretightning force to bolt body 100, the middle part light bar segment 120 of bolt body 100 can be drawn
Stretch (as shown in the direction of arrow in Fig. 1), and then drive stretching measurement bar 200 to produce axial displacement, high precision displacement now
Measuring unit 400 can axial displacement caused by inductive pick-up stretching measurement bar 200, data receiver 500 is receiving intelligence
The axial displacement data for the stretching measurement bar that the wired or wireless signal transmitting module of energy fastener is sent, data receiver
Data are delivered to data processor 600 by 500 to be handled, and the axial displacement data for stretching measurement bar 200 are converted into intelligence
The pretightning force of fastener, deliver to far-end server 700 again afterwards and monitored on-line.
The general principle and principal character and advantages of the present invention of the present invention has been shown and described above.The technology of the industry
Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the simply explanation described in above-described embodiment and specification is originally
The principle of invention, without departing from the spirit and scope of the present invention, various changes and modifications of the present invention are possible, these changes
Change and improvement all fall within the protetion scope of the claimed invention.The claimed scope of the invention by appended claims and its
Equivalent thereof.
Claims (5)
1. a kind of intelligent fastener, including bolt body, it is characterised in that the head of the bolt body is to setting in the middle part of bar portion
Axial hole is equipped with, a stretching measurement bar is fixed with the axial hole, the head of the bolt body is additionally provided with protection cap,
The protection cap is internally provided with the high precision position measuring unit of the axial displacement for sensing the stretching measurement bar, institute
Stating high precision position measuring unit has the wired or wireless signal emission module corresponding with exogenous data receiving terminal.
2. a kind of intelligent fastener as claimed in claim 1, it is characterised in that the outer surface of the stretching measurement bar is vertically
External screw thread is provided with, the axial hole is axial threaded hole, passes through spiral shell between the stretching measurement bar and the axial threaded hole
Line connects.
3. a kind of intelligent fastener as claimed in claim 1, it is characterised in that the outer wall and the axle of the stretching measurement bar
Fixed to the inwall between hole by glue.
A kind of 4. intelligent fastener as claimed in claim 1, it is characterised in that the stretching measurement bar and the axial hole it
Between pass through be interference fitted fix.
A kind of 5. intelligent fastener as described in Claims 1-4 any claim, it is characterised in that the high precision position
Measuring unit is high accuracy displacement sensor.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710528059.1A CN107339310A (en) | 2017-06-30 | 2017-06-30 | A kind of intelligent fastener |
| CN201810059418.8A CN108119480A (en) | 2017-06-30 | 2018-01-22 | A kind of intelligent fastener and its monitoring system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710528059.1A CN107339310A (en) | 2017-06-30 | 2017-06-30 | A kind of intelligent fastener |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107339310A true CN107339310A (en) | 2017-11-10 |
Family
ID=60218336
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710528059.1A Pending CN107339310A (en) | 2017-06-30 | 2017-06-30 | A kind of intelligent fastener |
| CN201810059418.8A Pending CN108119480A (en) | 2017-06-30 | 2018-01-22 | A kind of intelligent fastener and its monitoring system |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810059418.8A Pending CN108119480A (en) | 2017-06-30 | 2018-01-22 | A kind of intelligent fastener and its monitoring system |
Country Status (1)
| Country | Link |
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| CN (2) | CN107339310A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108571504A (en) * | 2018-05-08 | 2018-09-25 | 上海威纳工程技术有限公司 | Accurate pretension bolt |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110273909A (en) * | 2019-06-05 | 2019-09-24 | 上海应谱科技有限公司 | A kind of intelligent fastener and on-line monitoring system that can perceive fastener nut loosening |
| CN110763104A (en) * | 2019-11-18 | 2020-02-07 | 中核核电运行管理有限公司 | Bolt group pre-tightening data measurement and wireless acquisition device, system and method |
| CN113340506A (en) * | 2021-07-12 | 2021-09-03 | 哈尔滨工业大学 | Turbine pump shafting pretightning force detection device |
| CN114294312B (en) * | 2022-01-06 | 2024-07-12 | 四川精诚能源设备有限公司 | Anti-loose super bolt |
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| CH364913A (en) * | 1956-08-20 | 1962-10-15 | Statham Lab Inc | Electromechanical measuring wire converter |
| AT370217B (en) * | 1981-04-06 | 1983-03-10 | Fink Hans | FASTENING ELEMENT |
| US4454790A (en) * | 1982-04-30 | 1984-06-19 | Westinghouse Electric Corp. | Bolt stretch measurement device |
| US4686859A (en) * | 1984-11-13 | 1987-08-18 | Sps Technologies | Load indicating member, apparatus and method |
| GB2179459A (en) * | 1985-08-17 | 1987-03-04 | Rotabolt Ltd | Indicating tightness of fastening device |
| GB2372826A (en) * | 2001-03-01 | 2002-09-04 | Rotabolt Ltd | Load-indicating fastener |
| AT414346B (en) * | 2003-09-05 | 2013-10-15 | Best On Bolt Gmbh | SECURING ELEMENT FOR SECURING SCREW ELEMENTS |
| CN101082564A (en) * | 2006-06-01 | 2007-12-05 | 中国矿业大学 | Stochastic nondestructive power detecting technology for detecting anchor rod pressure state |
| CN203515972U (en) * | 2013-09-24 | 2014-04-02 | 南车株洲电力机车研究所有限公司 | Clamping force monitoring system for bolt connection of wind generating set |
| CN105485125B (en) * | 2016-01-05 | 2018-02-02 | 洛阳双瑞特种装备有限公司 | A kind of bolt and measuring method for surveying pretension elongation |
| CN206192331U (en) * | 2016-08-08 | 2017-05-24 | 上海应谱科技有限公司 | Safe off -line monitoring device of a wind turbine generator system foundation settlement and a tower section of thick bamboo |
| CN208221286U (en) * | 2017-06-30 | 2018-12-11 | 上海应谱科技有限公司 | A kind of intelligent fastener |
-
2017
- 2017-06-30 CN CN201710528059.1A patent/CN107339310A/en active Pending
-
2018
- 2018-01-22 CN CN201810059418.8A patent/CN108119480A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108571504A (en) * | 2018-05-08 | 2018-09-25 | 上海威纳工程技术有限公司 | Accurate pretension bolt |
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| Publication number | Publication date |
|---|---|
| CN108119480A (en) | 2018-06-05 |
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Application publication date: 20171110 |
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