CN202166494U - Device for monitoring fastening state of bolt - Google Patents
Device for monitoring fastening state of bolt Download PDFInfo
- Publication number
- CN202166494U CN202166494U CN2011202831995U CN201120283199U CN202166494U CN 202166494 U CN202166494 U CN 202166494U CN 2011202831995 U CN2011202831995 U CN 2011202831995U CN 201120283199 U CN201120283199 U CN 201120283199U CN 202166494 U CN202166494 U CN 202166494U
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- China
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- groove
- arc
- pressure
- bolt
- elastic washer
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Abstract
The utility model relates to a device for monitoring the fastening state of a bolt, which comprises a ring cylindrical elastic cushion ring, wherein, a through groove radially penetrating the ring cylinder is formed at the lower part of the elastic cushion ring so as to form two arc-shaped supporting legs at the lower part of the elastic cushion ring; a pressure strain gauge is arranged at the top of the groove mouth of the through groove; two sections of arc-shaped concave gaps are formed on two sides of the upper part of the elastic cushion ring parallel to the through groove so as to form two arc-shaped bosses at the upper part of the elastic cushion ring and perpendicular to the arc-shaped supporting legs; the pressure strain gauge is connected with a signal amplifier through a conducting wire; the signal amplifier is connected with a data acquisition device through a data cable; the data acquisition device is connected with present computer monitoring equipment through the data cable; and the computer monitoring equipment compares the periodically-acquired data signal value with the pre-arranged alarming threshold valve so as to decide whether an alarm is given or not. The monitoring device has the advantages of low cost and safety in operating, is free of manual participation, can be widely applied to hydroelectrical power plants, and other production and scientific research fields of which the pressure vessel is needed and bolt is required to be fastened.
Description
Technical field
The utility model relates to a kind of monitoring device, particularly about a kind of monitoring device that is used to monitor the bolt that is fastened on the electromechanical equipment (or nut, below be referred to as bolt) state.
Background technology
Be accompanied by science and technology and by leaps and bounds develop, power station both domestic and external installed capacity has ever-increasing trend, and single-machine capacity also constantly increases.The increase of single-machine capacity can reduce construction costs greatly, reduces cost, but also possibly cause stability to reduce because of the reduction of relative rigidity, brings out accident, even possibly therefore cause more serious destruction.Such as on August 17th, 2009; Major accident takes place in Russia Sa Yan Shu Shensike power station, and the accident investigation of Russian government tissue is thought afterwards: " the bolt destruction of being caused by dynamic load causes the sealing of water-turbine top cover and hydropower unit diversion passage to be torn." 49 fastening bolts of accidents caused No. 2 hydro-turbo generator set hydroturbine top covers are owing to high vibration ruptures, and then cause top cover to tear.Under the effect of water under high pressure, the top cover of the hydraulic turbine, cruciform frame begin to move upward together with the rotor of generator, and and then sealing torn, top cover, rotor etc. is carried away the machine hole, water under high pressure is full of turbine chamber and factory building rapidly.Before this, the hydroelectric power plant, Three Gorges had once also that to make an inspection tour worker's spiral case mandoor hold-down bolt that stumbles on loosening and in time report to the police, thereby had avoided the generation of water logging factory building major accident.All these proof, though screw bolt and nut is little, as long as its installation site is important, getting loose of bolt (or nut) may produce very serious and ill effect, widget also can get into serious trouble.Therefore, might cause the bolt that gets loose because of vibration and other reason again, be necessary very much to monitor being installed in critical positions.
But,, lack effective monitoring means because the past is deep inadequately to the get loose understanding of harmfulness of bolt always.Two kinds of possible monitoring modes are arranged at present: what expect the most easily is regular or irregular patrolling and examining, and its shortcoming is that cost is high, and is bigger to patrolling and examining dependences such as people's sense of responsibility, working attitude, and is difficult to avoid the generation of unexpected incidents; A kind of in addition is in bolt, bolt installation site the monitoring camera lens to be set, and vision signal is introduced Central Control Room keep watch on, and its shortcoming is that Central Control Room may not necessarily be seen clearly after bolt got loose, and the supervision personnel are too relied on.
Summary of the invention
To the problems referred to above, the purpose of the utility model provides a kind of bolted state monitoring apparatus that can realize that automatic monitor and predict is reported to the police.
Realize above-mentioned purpose; The utility model is taked following technical scheme: a kind of bolted state monitoring apparatus; It comprises that one is the elastic washer of ring cylinder, the bottom of elastic washer radially offer one run through ring cylinder groove, make the elastic washer bottom form two arc supporting legs; The notch top of groove is provided with the pressure-strain sheet; Parallel with groove, the both sides, top of elastic washer have two sections arc notches, make elastic washer top form two and are 90 ° arc boss with the arc supporting leg; The pressure-strain sheet connects a signal amplifier through lead, and signal amplifier connects a data collector through data line, and data collector connects the original computer watch-dog through data line.
The width of said elastic washer upper boss is less than the width of rebate of bottom groove.
Only there is a top center to be provided with a pressure-strain sheet in two notches of said groove.
Two notch top center of said groove are provided with a pressure-strain sheet.
The utility model is owing to take above technical scheme; It has the following advantages: 1, the utility model is owing to adopt elastic washer and be attached to the monitoring devices such as pressure-strain sheet and signal amplifier of its overhanging portion lower surface; Realize monitoring bolted state automatically; Carry out prediction and alarm in advance, artificial factor reaches the dependence to people's factors such as quality when monitoring judgement thereby reduced, and has saved human cost.2, the utility model is owing to adopt steel processing packing ring and stable performance, the long pressure-strain sheet of life-span of good springiness, makes measuring-signal strong and stablize, thereby has advantages of higher stability and reliability, the use that the user can be relieved.3, the utility model is not because the elastic washer that uses, pressure-strain sheet and auxiliary instrument, equipment all have specific (special) requirements, and testing apparatus is less, so manufacturing cost is lower, and is easy to install and use.4, the utility model can be used for power station, thermal power station and other comprises pressure vessel and needs production and the scientific research field with bolted, is with a wide range of applications.
Description of drawings
Fig. 1 is that the utility model is formed synoptic diagram
Fig. 2 is the figure of facade projection of the utility model elastic washer that the pressure-strain sheet is housed
Fig. 3 is the vertical view of Fig. 2
Embodiment
Below in conjunction with accompanying drawing and embodiment the utility model is carried out detailed description.
Like Fig. 1, Fig. 2, shown in Figure 3; The utility model comprises that one is the elastic washer 1 of ring cylinder; Radially offer in the bottom of elastic washer 1 one run through ring cylinder groove 2; Make elastic washer 1 bottom form two arc supporting legs 3, two notch top center of the groove 2 between two arc supporting legs 3 respectively are provided with a pressure-strain sheet 4; Pressure-strain sheet 4 also can be that two notches only paste a slice or two notches respectively paste two or more.Two sections arc cylinders in the both sides, top and groove 2 parallel excisions of elastic washer 1 make elastic washer 1 top form two and are 90 ° arc boss 5 with the arc supporting leg.Simultaneously, the width of boss 5 is less than the width between two arc supporting legs 3, makes boss 5 both sides, supporting leg 3 tops form the overhanging portion 6 lower than boss 5 so that elastic washer 1 when bearing pressure its overhanging portion 6 bigger distortion can be arranged.Pressure-strain sheet 4 connects a signal amplifier 7 through lead, and signal amplifier 7 connects a data collector 8 through data line, behind the signal that data collector 8 is gathered after signal amplifier amplifies, signal is transferred to original computer watch-dog 9.
In the foregoing description, elastic washer 1 can adopt the steel of good springiness to process.
The principle of work of the utility model is: the bolt 10 that the utility model is housed when employing is pressed abd fixed on 12 last times of fixed part with fastened parts 11; At first should apply a pretightning force through 10 the mode of tighting a bolt; Elastic washer 1 between bolt 10 and fastened parts 11 can receive the pressure from bolt 10; When pressure reached certain value, stretcher strain can take place because of pressurized in two the pressure-strain sheets 4 that are positioned at the notch top of elastic washer 1 groove 2, thereby produces corresponding electric signal; Original computer watch-dog 9 is gathered and sent to this signal by data collector 8 after amplifying through signal amplifier 7.When bolt 11 imposes on the pressure reduction of elastic washer 1; Above-mentioned pressure-strain sheet 4 also can reduce stretcher strain thereupon; Thereby corresponding electric signal is changed; This signal variation is amplified the back, is gathered and send to original computer watch-dog 9 by data collector 8 through signal amplifier 7, thereby can corresponding foundation be provided for warning or other safeguard measure are set in computer monitoring equipment 9.
When using the utility model, may further comprise the steps:
The bolt that 1) the utility model elastic washer will be housed revolves and is located on the fastener;
2) read and write down elastic washer computer monitoring equipment data presented signal value before compacted;
3) in the process that tights a bolt, read also logger computer watch-dog data presented signal value at interval according to the number of turns of tightening that presets, set up and tighten the relation between the number of turns and the data value signal, tightened fully until bolt;
4) airtight container (pressure vessel, hydraulic turbine runner etc.) pressurization is read and is write down airtight container and is forced into computer monitoring equipment data presented signal value after the working pressure;
5) according to step 3)～4) data value signal that obtained, confirm a data value signal as taking the pairing alarm threshold value of warning measure, and be preset in the computer monitoring equipment;
6) in observation process, the new data value signal of the regular control data harvester of computer monitoring equipment collection, and itself and preset alarm threshold value compared: if data value signal less than alarm threshold value, computer monitoring equipment gives the alarm.
In the foregoing description, confirm the mode of alarm threshold value, comprise following two kinds:
1) bolt is tightened 0.8～0.9 times of back computer monitoring equipment data presented signal value fully as taking the pairing alarm threshold value of warning measure;
2) sealed container interior pressure is reached 0.8～0.9 times of computer monitoring equipment data presented signal value after the working pressure as taking the pairing alarm threshold value of warning measure.
Wherein second kind of alarm threshold value causes wrong report easily.
In the foregoing description, when using the bolted airtight container, preferably use special-purpose dial torque wrench to tight a bolt by original equipment requirements pretightning force; And after bolt was tightened fully, airtight container pressurizeed, and must guarantee that the phenomenon that when its internal pressure reaches working pressure, does not have escape of liquid or pressure decline takes place.
Above-mentioned each embodiment only is used to explain the utility model; Wherein the structure of each parts, connected mode etc. all can change to some extent; As connecting can be that bolt or screw bolt and nut are used; Every equivalents of on the basis of the utility model technical scheme, carrying out and improvement all should not got rid of outside the protection domain of the utility model.
Claims (4)
1. bolted state monitoring apparatus, it is characterized in that: it comprises that one is the elastic washer of ring cylinder, the bottom of said elastic washer radially offer one run through ring cylinder groove, make said elastic washer bottom form two arc supporting legs; The notch top of said groove is provided with the pressure-strain sheet; Parallel with said groove, the both sides, top of said elastic washer have two sections arc notches, make said elastic washer top form two and are 90 ° arc boss with the arc supporting leg; Said pressure-strain sheet connects a signal amplifier through lead, and said signal amplifier connects a data collector through data line, and said data collector connects the original computer watch-dog through data line.
2. a kind of bolted state monitoring apparatus as claimed in claim 1, it is characterized in that: the width of said elastic washer upper boss is less than the width of rebate of bottom groove.
3. according to claim 1 or claim 2 a kind of bolted state monitoring apparatus is characterized in that: only have a top center to be provided with a pressure-strain sheet in two notches of said groove.
4. according to claim 1 or claim 2 a kind of bolted state monitoring apparatus, it is characterized in that: two notch top center of said groove are provided with a pressure-strain sheet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202831995U CN202166494U (en) | 2011-08-05 | 2011-08-05 | Device for monitoring fastening state of bolt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202831995U CN202166494U (en) | 2011-08-05 | 2011-08-05 | Device for monitoring fastening state of bolt |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202166494U true CN202166494U (en) | 2012-03-14 |
Family
ID=45802312
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011202831995U Withdrawn - After Issue CN202166494U (en) | 2011-08-05 | 2011-08-05 | Device for monitoring fastening state of bolt |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202166494U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102322983A (en) * | 2011-08-05 | 2012-01-18 | 中国水利水电科学研究院机电所 | Bolt fastening state monitoring device and use method thereof |
| CN107192496A (en) * | 2017-07-13 | 2017-09-22 | 福建省永正工程质量检测有限公司 | A kind of high-strength bolt pretightning force detection method |
| CN108150516A (en) * | 2016-12-06 | 2018-06-12 | 上海丞捷机电有限公司 | A kind of locking stretching dynamometry washer |
| CN108386437A (en) * | 2018-01-11 | 2018-08-10 | 深圳市远望谷信息技术股份有限公司 | A kind of fastener |
| CN109372882A (en) * | 2018-11-21 | 2019-02-22 | 中国航空工业集团公司北京航空精密机械研究所 | It is a kind of can be with the washer of monitoring bolt pretightning force |
-
2011
- 2011-08-05 CN CN2011202831995U patent/CN202166494U/en not_active Withdrawn - After Issue
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102322983A (en) * | 2011-08-05 | 2012-01-18 | 中国水利水电科学研究院机电所 | Bolt fastening state monitoring device and use method thereof |
| CN108150516A (en) * | 2016-12-06 | 2018-06-12 | 上海丞捷机电有限公司 | A kind of locking stretching dynamometry washer |
| CN107192496A (en) * | 2017-07-13 | 2017-09-22 | 福建省永正工程质量检测有限公司 | A kind of high-strength bolt pretightning force detection method |
| CN108386437A (en) * | 2018-01-11 | 2018-08-10 | 深圳市远望谷信息技术股份有限公司 | A kind of fastener |
| WO2019137440A1 (en) * | 2018-01-11 | 2019-07-18 | 深圳市远望谷信息技术股份有限公司 | Fastener |
| CN109372882A (en) * | 2018-11-21 | 2019-02-22 | 中国航空工业集团公司北京航空精密机械研究所 | It is a kind of can be with the washer of monitoring bolt pretightning force |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20120314 Effective date of abandoning: 20130306 |
|
| RGAV | Abandon patent right to avoid regrant |