CN213748180U - Bolt elongation measuring tool for process monitoring - Google Patents
Bolt elongation measuring tool for process monitoring Download PDFInfo
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- CN213748180U CN213748180U CN202023023098.2U CN202023023098U CN213748180U CN 213748180 U CN213748180 U CN 213748180U CN 202023023098 U CN202023023098 U CN 202023023098U CN 213748180 U CN213748180 U CN 213748180U
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Abstract
The utility model discloses a bolt elongation measuring tool that can be used to process monitoring, its characterized in that: the measuring device comprises a measuring rod assembly, a sleeve, a spring, a measuring plate and a measuring instrument, wherein the spring and the measuring plate are arranged in the sleeve, the spring is in a compressed state, the measuring end of the measuring instrument extends into the sleeve and penetrates through the spring to be in contact with one surface of the measuring plate, the other surface of the measuring plate is connected with the measuring rod assembly, and the measuring rod assembly is in contact with the bottom of a central hole of a bolt to convert the elongation of the bolt into the displacement of the measuring plate and then read out through the measuring instrument. The utility model has simple disassembly and assembly, convenient use and accurate measurement, and can be used for measuring the elongation of bolts at any angle; compact structure, reasonable in design can use with the bolt elongator simultaneously, realize the monitoring to the tensile volume in the fastening process.
Description
Technical Field
The utility model relates to a bolt elongation measuring tool that can be used to process monitoring belongs to bolt-up technical field.
Background
In order to better control the fastening quality of the bolt, more and more bolt elongations are used as a standard for controlling the fastening of the bolt. Taking a Haiyang nuclear power turbine generator unit as an example, the fastening mode of the bolt comprises stretching, heating, hydraulic wrench fastening and the like, but most of the fastening modes take bolt elongation as the fastening requirement. The bolt is provided with a central hole, and the measuring device is inserted into the central hole to measure the elongation of the bolt.
Taking the Haiyang nuclear power high-pressure cylinder as an example, the median plane has 114 bolts, which are all tensile bolts. The original bolt elongation measuring tool measures the length of the bolt before and after stretching, and the final elongation of the bolt is obtained after calculation. Because the measuring tool can not monitor the stretching process of the bolt, the condition of reworking caused by exceeding or insufficient stretching amount often occurs, and the bolt fastening efficiency is greatly reduced. Repeated assembly and disassembly of the bolts also easily causes partial bolts to be fastened incompletely, so that the leakage of the flange surface is caused.
In order to ensure the fastening efficiency and quality of the bolt and ensure that the bolt is stretched in place once so as to avoid reworking, the change of the elongation of the bolt in the stretching process is monitored.
Therefore, in view of the above considerations, it is necessary to design a new bolt elongation measuring tool.
Disclosure of Invention
The utility model aims at: the bolt elongation measuring tool is designed to accurately measure the elongations of bolts with center holes arranged in various directions and is simple to operate, the elongation change in the bolt stretching process is monitored, the working efficiency is improved, and rework caused by excessive or insufficient elongations is avoided.
In order to achieve the above purpose, the utility model discloses the technical scheme who takes does:
a bolt elongation measurement tool usable for process monitoring, characterized by: the measuring device comprises a measuring rod assembly, a sleeve, a spring, a measuring plate and a measuring instrument, wherein the spring and the measuring plate are arranged in the sleeve, the spring is in a compressed state, the measuring end of the measuring instrument extends into the sleeve and penetrates through the spring to be in contact with one surface of the measuring plate, the other surface of the measuring plate is connected with the measuring rod assembly, and the measuring rod assembly is in contact with the bottom of a central hole of a bolt to convert the elongation of the bolt into the displacement of the measuring plate and then read out through the measuring instrument.
Preferably, the measuring rod assembly comprises a measuring rod and a countersunk head matched with the bottom of the central hole of the bolt, and two ends of the measuring rod are respectively connected with the measuring plate and the countersunk head.
Preferably, an extension rod for adjusting the length of the measuring rod assembly is arranged between the measuring rod and the measuring plate, the measuring rod is of a sleeve type structure, one end of the extension rod is fixedly connected with the measuring plate, the other end of the extension rod is fixedly connected with the opening end of the sleeve of the measuring rod, the opening end of the sleeve is provided with a plurality of connecting holes, and the length of the measuring rod assembly is adjusted by adjusting the positions of the connecting holes.
Preferably, the sleeve is provided with a fixing part for fixing the measuring instrument, the fixing part comprises a threaded hole formed in the side wall of the sleeve and an adjusting fastener arranged in the threaded hole, and the measuring instrument is fixed or loosened by changing the distance between the adjusting fastener and the measuring instrument.
Preferably, a clamp spring used for limiting the position of the measuring plate is arranged between the measuring plate and the sleeve.
Preferably, the measuring rod is provided with a positioning plate matched with a central hole of the bolt along the radial direction.
Preferably, the positioning plate is arranged between the measuring rod and the countersunk head.
Preferably, the outer side of the sleeve is provided with a thread which is fixedly connected with the central hole of the bolt.
Preferably, the measuring instrument is a dial indicator.
Compared with the prior art, the beneficial effects of the utility model are that:
the utility model relates to an integral type measuring tool, except that other kit that are the assembly and accomplish of measuring apparatu, installation, use and dismantlement are simple, convenient.
The utility model has the advantages of compact structure and reasonable design, can use simultaneously with the bolt elongator, realize the supervision to the change of fastening in-process elongation.
The utility model discloses a sleeve sets up the external screw thread, on the screw thread of screw in bolt centre bore when the instrument is used, ensures that measuring tool and bolt are concentric in order to guarantee measurement accuracy, has prevented because the instrument installation that factors such as manual operation difference and environment lead to is eccentric, slope etc..
The utility model discloses an inside spring that is provided with of sleeve, spring lie in the sleeve and measure between the board, and the spring is in compression state when the instrument uses, ensures that the removal of measuring the board does not have the incline, can guarantee simultaneously that the instrument is applicable to the measurement of various direction bolts.
The utility model discloses a measuring instrument installs to the sleeve top on, fixes through adjusting screw, applicable in the measuring instrument of different specifications. The adjusting screw can adjust the fastening degree of the measuring instrument, so that the measuring instrument can be prevented from moving in the measuring process due to the fact that the measuring instrument is not firmly fastened, and the measuring instrument can be prevented from normally acting due to the fact that the fastening force of the measuring instrument is too large.
The utility model discloses a measuring stick is retractable, according to the length of the adjustable measuring stick of different sizes of bolt.
The utility model discloses a be provided with the measuring board, install to the sleeve in, the bottom carries on spacingly through the jump ring. And the bolt is in threaded fit with the measuring rod, and the length change of the bolt is converted into the displacement of the measuring plate along the vertical direction after being transmitted by the measuring rod.
The utility model discloses a percentage table gauge rod and measuring plate contact for measure the change of bolt elongation.
The utility model discloses a bottom of measuring stick sets up the countersunk head, and the countersunk head disc cooperates with the bottom processing disc of bolt centre bore, is applicable to the bolt of different specifications, and can guarantee the stability of measuring stick in the measurement process, ensures measurement accuracy.
The utility model discloses a sleeve fixing bolt and spring can guarantee that this instrument not only is applicable to vertical formula bolt, can also be used for the level to arrange the measurement of equidirectional bolt elongation.
Drawings
Fig. 1 is a diagram of a bolt elongation measuring tool according to the present invention for use in process monitoring.
Fig. 2 is a mounting diagram of a bolt elongation measuring tool for process monitoring according to the present invention.
Detailed Description
In order to make the present invention more comprehensible, preferred embodiments are described in detail below with reference to the accompanying drawings.
As shown in fig. 1, the utility model relates to a bolt elongation measuring tool that can be used to process monitoring includes measuring rod subassembly, sleeve 2, spring 3, measures board 4 and measuring instrument, and spring 3 and measuring board 4 dress are in sleeve 2, and the spring 3 card is in compression state in sleeve 2, and it is spacing that measuring board 4 is located spring 3's below and uses jump ring 6. The measuring instrument is a dial indicator 1, a dial indicator rod of the dial indicator 1 extends into the sleeve 2 and penetrates through the spring 3 to be in surface contact with the upper surface of the measuring plate 4, and the lower surface of the measuring plate 4 is connected with the measuring rod assembly.
The measuring stick subassembly includes extension rod 7, set screw 8, measuring stick 9 and countersunk head 11, and measuring stick 9 is bushing type structure, and 7 one end of extension rod and the lower surface threaded connection of measuring board 4, the other end insert measuring stick 9's the cover intraductal and fix a position through set screw 8. A plurality of connecting holes are processed on the sleeve, and the length of the telescopic measuring rod assembly can be adjusted according to the size of the central hole of the bolt. The bottom of the measuring rod 9 is a countersunk head 11 with a circular structure, and the countersunk head 11 is in contact with the bottom of the central hole of the bolt, so that the measuring accuracy is ensured. The lower part of the measuring rod 9 is provided with an integrated positioning plate 10, and the positioning plate 10 is arranged between the measuring rod 9 and the countersunk head 11 and is in contact with the side wall of the central hole of the bolt, so that the measuring rod is ensured not to incline or shake in the working process.
And the outer side of the sleeve 2 is provided with a thread which is fixedly connected with the central hole of the bolt. The side wall of the sleeve 2 is provided with a threaded hole along the radial direction, an adjusting screw 5 is arranged in the threaded hole, the dial indicator 1 is inserted into the upper part of the sleeve 2 and is fixed through the adjusting screw 5, and the distance between the adjusting screw 5 and the dial indicator 1 is changed to fix or loosen the measuring instrument.
As shown in FIG. 2, the utility model discloses during operation, measuring stick subassembly inserts in the bolt centre bore, and sleeve 2 passes through the screw thread and installs to the bolt centre bore on, 9 bottom countersunk head 11 of measuring stick and the contact of bolt centre bore bottom convert the elongation of bolt to reading through measuring instrument after the displacement of measuring board 4 to realize measuring.
The specific using process is as follows:
1. referring to fig. 1, a spring 3 is put into a sleeve 2;
2. placing the measuring plate 4 into the sleeve 2 to enable the spring 3 to be in a compressed state, and installing a clamp spring 6 for positioning the measuring plate 4;
3. inserting the extension rod 7 into the measuring rod 9, adjusting the length of the measuring rod assembly according to the size of the central hole of the bolt, and screwing the fixing screw 8 after the adjustment is finished;
4. screwing the end part of the extension rod 7 into the thread on the lower surface of the measuring plate 4;
5. referring to fig. 2, the assembled measuring assembly is inserted into a bolt center hole, and the sleeve 2 is mounted to the bolt center hole through an external thread;
6. the dial indicator 1 is arranged on the upper part of the sleeve, and the indicator rod is in surface contact with the upper surface of the measuring plate 4. After the dial indicator 1 is adjusted to be in a measuring state, the dial indicator is fixed by screwing the adjusting screw 5;
7. and in the bolt stretching or fastening process, the stretching length of the bolt is obtained by reading the reading of the dial indicator 1.
Claims (9)
1. A bolt elongation measurement tool usable for process monitoring, characterized by: including measuring rod subassembly, sleeve (2), spring (3), measuring board (4) and measuring instrument, establish in sleeve (2) spring (3) and measuring board (4), spring (3) are in compression state, measuring instrument's measuring end stretches into sleeve (2) and passes spring (3) and the one side contact of measuring board (4), and the another side and the measuring rod subassembly of measuring board (4) are connected, and measuring rod subassembly and the bottom contact of bolt centre bore read out through measuring instrument after converting the elongation of bolt into the displacement of measuring board (4).
2. A bolt elongation measuring tool usable for process monitoring according to claim 1, wherein: the measuring rod assembly comprises a measuring rod (9) and a countersunk head (11) matched with the bottom of the central hole of the bolt, and the two ends of the measuring rod (9) are respectively connected with the measuring plate (4) and the countersunk head (11).
3. A bolt elongation measuring tool usable for process monitoring according to claim 2, wherein: be equipped with extension rod (7) of adjusting measurement rod subassembly length between measuring stick (9) and measuring board (4), measuring stick (9) are bushing type structure, and extension rod (7) one end is connected fixedly with measuring board (4), and the other end is connected fixedly with the sleeve pipe open end of measuring stick (9), the sleeve pipe open end is equipped with a plurality of connecting holes, realizes the regulation of measurement rod subassembly length through the position of adjusting the connecting hole.
4. A bolt elongation measuring tool usable for process monitoring according to claim 1, wherein: be equipped with the mounting that is used for fixed measuring instrument on sleeve (2), the mounting is including establishing the screw hole on sleeve (2) lateral wall and establishing the adjustment fastener in the screw hole, realizes measuring instrument's fixed or unclamp through the distance that changes between adjustment fastener and the measuring instrument.
5. A bolt elongation measuring tool usable for process monitoring according to claim 1, wherein: a clamp spring (6) used for limiting the position of the measuring plate (4) is arranged between the measuring plate (4) and the sleeve (2).
6. A bolt elongation measuring tool usable for process monitoring according to claim 2, wherein: and a positioning plate (10) matched with the central hole of the bolt is arranged on the measuring rod (9) along the radial direction.
7. A bolt elongation measuring tool usable for process monitoring according to claim 6, wherein: the positioning plate (10) is arranged between the measuring rod (9) and the countersunk head (11).
8. A bolt elongation measuring tool usable for process monitoring according to claim 1, wherein: and the outer side of the sleeve (2) is provided with a thread fixedly connected with a central hole of the bolt.
9. A bolt elongation measuring tool usable for process monitoring according to claim 1, wherein: the measuring instrument is a dial indicator (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023023098.2U CN213748180U (en) | 2020-12-15 | 2020-12-15 | Bolt elongation measuring tool for process monitoring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023023098.2U CN213748180U (en) | 2020-12-15 | 2020-12-15 | Bolt elongation measuring tool for process monitoring |
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| Publication Number | Publication Date |
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| CN213748180U true CN213748180U (en) | 2021-07-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202023023098.2U Active CN213748180U (en) | 2020-12-15 | 2020-12-15 | Bolt elongation measuring tool for process monitoring |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113685425A (en) * | 2021-08-27 | 2021-11-23 | 中国核动力研究设计院 | Bolt sealing structure and pressure container of high-flux engineering test reactor |
-
2020
- 2020-12-15 CN CN202023023098.2U patent/CN213748180U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113685425A (en) * | 2021-08-27 | 2021-11-23 | 中国核动力研究设计院 | Bolt sealing structure and pressure container of high-flux engineering test reactor |
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