CN103487322A - Method and tool for measuring extension value of vertically-installed cold-drawn bolt with measurement hole - Google Patents
Method and tool for measuring extension value of vertically-installed cold-drawn bolt with measurement hole Download PDFInfo
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- CN103487322A CN103487322A CN201310408944.8A CN201310408944A CN103487322A CN 103487322 A CN103487322 A CN 103487322A CN 201310408944 A CN201310408944 A CN 201310408944A CN 103487322 A CN103487322 A CN 103487322A
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Abstract
The invention discloses a method for measuring an extension value of a vertically-installed cold-drawn bolt with a measurement hole. The method comprises the following steps: (1) inserting a length-adjustable measuring rod into the measurement hole of the measured bolt; (2) installing a dial indicator above the measured bolt through a fixing seat, directly contacting a probe of the dial indicator with the top of the measuring rod, and recording the reading of the dial indicator at the moment; and (3) extending the measured bolt through a drawing tool so as to achieve the effect that the dial indicator on the top of the measured bolt moves upwards, the probe of the dial indicator, in direct contact with the top of the measuring rod all the time, freely falls down by virtue of dead weight, the reading of the dial indicator is changed, and a reading change value of the dial indicator is an actual extension value of the bolt after drawing is completed. According to the method, the extension value of the vertically-installed cold-drawn bolt with the measurement hole can be simply, quickly and accurately measured.
Description
Technical field
The present invention relates to a kind of measuring method, specifically a kind of measuring method and survey instrument that is applicable to the cold drawn bolt elongate value of the large-scale vertical mounting strap measured hole in any field.
Background technology
Le Tan hydroelectric power plant rotary wheel of water turbine and servomotor cylinder coupling bolt, water are sent out shaft link bolt and are M160 cold stretch fastening bolt.Traditional measuring method must be cleaned out the bolt measured hole before stretching is fastening, then adopts fixedly measuring staff and vernier depth gauge measurement relative depth, after the end that stretches, measures relative depth one time again, then with plus-minus method, calculates the stretch value of bolt.Shortcoming is that measured hole is darker, and the cleaning difficulty is large, is difficult to clean out thoroughly, after usually occurring measuring staff is taken out, puts in and remeasures, and there is very large deviation in the data that front and back record, and the accuracy of measurement is difficult to be guaranteed.Therefore, the safe handling of bolt existed to very large potential safety hazard.
Summary of the invention
Technical matters to be solved by this invention is to provide the method for the cold drawn bolt elongate value of the vertical mounting strap measured hole of a kind of measurement easy and simple to handle, accurate and the instrument that the method adopts.
The present invention solves the problems of the technologies described above with following technical scheme:
The measuring method of the cold drawn bolt elongate value of the vertical mounting strap measured hole of the present invention is operated according to the following steps:
1) measuring staff of adjustable length is inserted in the measured hole of tested bolt;
2) dial gauge is arranged on to the top of tested bolt by holder, the chaining pin of dial gauge directly contacts with the measuring staff top, and writes down dial gauge reading now;
3) by stretching tool by tested bolt elongate, the dial gauge at tested bolt top also with on move, all the time the dial gauge chaining pin directly contacted with the measuring staff top is by the deadweight free-falling, and cause the variation of dial gauge reading, stretch after end, dial gauge reading changing value is the actual stretch value of bolt.
In step (2), in the time of preferably regulating the contact position at the chaining pin of dial gauge and measuring staff top, make the chaining pin reading at 1/2 of its range, and will show zeroing.
The survey instrument of the cold drawn bolt elongate value of the vertical mounting strap measured hole of the present invention consists of the measuring staff of dial gauge, holder and adjustable length, the measuring staff of adjustable length inserts in the measured hole of tested bolt when measuring, holder is arranged on the top of tested bolt, dial gauge is arranged on holder, and the chaining pin of dial gauge directly contacts with the measuring staff top of adjustable length.
The measuring staff of described adjustable length consists of measuring staff body and adjusting screw(rod), and measuring staff body and adjusting screw(rod) are threaded connection, and are provided with check nut in junction.
The present invention has following advantage:
1, simple to operate, measure accurately.
But this survey instrument of several covers of the multi-processing 2, a plurality of bolts stretched, stretch and measure simultaneously simultaneously, be convenient to the stretch value of comparison and each bolt of adjustment, guarantee the balance of symmetric orientation bolted, eliminate the unbalanced potential safety hazard of tension values.
3, the measuring staff of adjustable length can adapt to the measurement of different lengths bolt.
The accompanying drawing explanation
Fig. 1 is the structural representation of the survey instrument of the cold drawn bolt elongate value of the vertical mounting strap measured hole of the present invention.
In figure: 1---stretching tool, 2---gib screw, 3---holder, 4---hydraulic turbine macro-axis, 5---generator's motor shaft, 6---nut, 7---shaft link bolt, 8---check nut, 9---adjusting screw(rod), 10---dial gauge, 11---the measuring staff of adjustable length, 12---the measuring staff body.
Embodiment
As shown in drawings, the survey instrument of the cold drawn bolt elongate value of the vertical mounting strap measured hole of the present invention consists of the measuring staff 11 of dial gauge 10, holder 3 and adjustable length, the measuring staff 11 of described adjustable length consists of measuring staff body 12 and adjusting screw(rod) 9, measuring staff body 12 is provided with positioning convex, for limiting measuring staff generation transversal displacement, the top of measuring staff body 12 and adjusting screw(rod) 9 are threaded connection, and are provided with check nut 8 in junction.Shaft link bolt 7 forms hydraulic turbine macro-axis 4 to be connected with generator's motor shaft 5, and by nut 6 lockings.While measuring the stretch value of shaft link bolt 7, first the measuring staff of adjustable length 11 is inserted in tested shaft link bolt 7 measured holes when measuring, holder 3 is arranged on shaft link bolt 7 tops, dial gauge 10 is arranged on holder 3 by gib screw 2, and the chaining pin of dial gauge 10 directly contacts with adjusting screw(rod) 9 tops.
The measuring method of the cold drawn bolt elongate value of the vertical mounting strap measured hole of the present invention is operated according to the following steps:
1, bolt tension instrument 1 is installed;
2, the measuring staff of adjustable length 11 is inserted to the measured hole of shaft link bolt 7, the adjusting screw(rod) 9 of regulating top makes the length of measuring staff 11 extend correct position, then locks with check nut 8;
3, holder 3 is arranged on to the top of shaft link bolt 7;
4, dial gauge 10 is arranged on holder 3 by gib screw 2, requires the chaining pin of dial gauge 10 directly to contact with adjusting screw(rod) 9 tops, and adjust reading in 1/2 left and right of its range, and will show zeroing.Record dial gauge reading L1 now.
5, utilize bolt tension instrument 1 that shaft link bolt 7 is stretched to desirable value, then nut 6 is tightened, then bolt tension instrument pulling force is removed, now the reading of dial gauge is L2.
6, calculate bolt elongate value DL=|L1-L2|.
Adopt the inventive method to measure the stretch value of bolt, easy and simple to handle, result is accurate.
Claims (4)
1. the measuring method of the vertical cold drawn bolt elongate value of mounting strap measured hole, is characterized in that, operated according to the following steps:
1) measuring staff of adjustable length is inserted in the measured hole of tested bolt;
2) dial gauge is arranged on to the top of tested bolt by holder, the chaining pin of dial gauge directly contacts with the measuring staff top, and writes down dial gauge reading now;
3) by stretching tool by tested bolt elongate, the dial gauge at tested bolt top with on move, all the time the dial gauge chaining pin directly contacted with the measuring staff top is by the deadweight free-falling, and cause the variation of dial gauge reading, stretch after end, dial gauge reading changing value is the actual stretch value of bolt.
2. the vertical measuring method of the cold drawn bolt elongate value of mounting strap measured hole according to claim 1, it is characterized in that, in step (2), when the chaining pin of adjusting dial gauge and the contact position at measuring staff top, make the chaining pin reading at 1/2 of its range, and will show zeroing.
3. the vertical survey instrument of the cold drawn bolt elongate value of mounting strap measured hole, it is characterized in that, it consists of the measuring staff of dial gauge, holder and adjustable length, the measuring staff of adjustable length inserts in the measured hole of tested bolt when measuring, holder is arranged on the top of tested bolt, dial gauge is arranged on holder, and the chaining pin of dial gauge directly contacts with the measuring staff top of adjustable length.
4. the vertical survey instrument of the cold drawn bolt elongate value of mounting strap measured hole according to claim 3, it is characterized in that, the measuring staff of described adjustable length consists of measuring staff body and adjusting screw(rod), and measuring staff body and adjusting screw(rod) are threaded connection, and are provided with check nut in junction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310408944.8A CN103487322A (en) | 2013-09-10 | 2013-09-10 | Method and tool for measuring extension value of vertically-installed cold-drawn bolt with measurement hole |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310408944.8A CN103487322A (en) | 2013-09-10 | 2013-09-10 | Method and tool for measuring extension value of vertically-installed cold-drawn bolt with measurement hole |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103487322A true CN103487322A (en) | 2014-01-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310408944.8A Pending CN103487322A (en) | 2013-09-10 | 2013-09-10 | Method and tool for measuring extension value of vertically-installed cold-drawn bolt with measurement hole |
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| CN (1) | CN103487322A (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103822562A (en) * | 2014-02-20 | 2014-05-28 | 重庆市排水有限公司 | Chlorination contact pool expansion joint monitoring device |
| CN105444658A (en) * | 2015-11-13 | 2016-03-30 | 哈尔滨电机厂有限责任公司 | Hydro-generator coupling bolt elongation value measurement technique |
| CN105485125A (en) * | 2016-01-05 | 2016-04-13 | 洛阳双瑞特种装备有限公司 | Bolt capable of measuring pre-tightening elongation amount and measuring method |
| CN106248488A (en) * | 2016-07-20 | 2016-12-21 | 哈尔滨电气动力装备有限公司 | Kingbolt stretching and measurement technique |
| CN107225393A (en) * | 2017-06-02 | 2017-10-03 | 中国航发南方工业有限公司 | Compressor auxiliary installation device |
| CN108007782A (en) * | 2017-12-29 | 2018-05-08 | 襄阳福瑞特机械制造有限公司 | Bolt strength detection device and method |
| CN108387159A (en) * | 2018-05-11 | 2018-08-10 | 重庆高金实业有限公司 | A kind of connecting-rod bolts elongation measuring device and measuring method |
| CN109059830A (en) * | 2018-08-28 | 2018-12-21 | 徐工集团工程机械有限公司 | A kind of bolt elongate amount detecting device |
| CN110411323A (en) * | 2019-07-24 | 2019-11-05 | 西南交通大学 | A kind of device for being detected to brush box in locomotive earthing or grounding means |
| CN113357997A (en) * | 2021-05-26 | 2021-09-07 | 中国长江电力股份有限公司 | Device and method for measuring elongation value of bolt with bolt hole |
| CN114216766A (en) * | 2021-11-24 | 2022-03-22 | 哈尔滨电气动力装备有限公司 | Method for measuring stretching length of main bolt of shaft seal type nuclear main pump |
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| JPH1089942A (en) * | 1996-09-12 | 1998-04-10 | Hitachi Ltd | Method for measuring elongation of turbine stacking bolt |
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| CN102636094A (en) * | 2012-04-26 | 2012-08-15 | 哈尔滨电机厂有限责任公司 | Thickness measurement device for filler strip under slot wedge of steam turbogenerator rotor |
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2013
- 2013-09-10 CN CN201310408944.8A patent/CN103487322A/en active Pending
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103822562A (en) * | 2014-02-20 | 2014-05-28 | 重庆市排水有限公司 | Chlorination contact pool expansion joint monitoring device |
| CN105444658A (en) * | 2015-11-13 | 2016-03-30 | 哈尔滨电机厂有限责任公司 | Hydro-generator coupling bolt elongation value measurement technique |
| CN105485125A (en) * | 2016-01-05 | 2016-04-13 | 洛阳双瑞特种装备有限公司 | Bolt capable of measuring pre-tightening elongation amount and measuring method |
| 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 |
| CN106248488A (en) * | 2016-07-20 | 2016-12-21 | 哈尔滨电气动力装备有限公司 | Kingbolt stretching and measurement technique |
| CN107225393A (en) * | 2017-06-02 | 2017-10-03 | 中国航发南方工业有限公司 | Compressor auxiliary installation device |
| CN108007782A (en) * | 2017-12-29 | 2018-05-08 | 襄阳福瑞特机械制造有限公司 | Bolt strength detection device and method |
| CN108387159A (en) * | 2018-05-11 | 2018-08-10 | 重庆高金实业有限公司 | A kind of connecting-rod bolts elongation measuring device and measuring method |
| CN109059830A (en) * | 2018-08-28 | 2018-12-21 | 徐工集团工程机械有限公司 | A kind of bolt elongate amount detecting device |
| CN110411323A (en) * | 2019-07-24 | 2019-11-05 | 西南交通大学 | A kind of device for being detected to brush box in locomotive earthing or grounding means |
| CN113357997A (en) * | 2021-05-26 | 2021-09-07 | 中国长江电力股份有限公司 | Device and method for measuring elongation value of bolt with bolt hole |
| CN114216766A (en) * | 2021-11-24 | 2022-03-22 | 哈尔滨电气动力装备有限公司 | Method for measuring stretching length of main bolt of shaft seal type nuclear main pump |
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Application publication date: 20140101 |