CN214698697U - From tensile bolt of taking elongation measuring device - Google Patents
From tensile bolt of taking elongation measuring device Download PDFInfo
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- CN214698697U CN214698697U CN202023140211.5U CN202023140211U CN214698697U CN 214698697 U CN214698697 U CN 214698697U CN 202023140211 U CN202023140211 U CN 202023140211U CN 214698697 U CN214698697 U CN 214698697U
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Abstract
The utility model belongs to the technical field of stretching bolts, in particular to a stretching bolt with a stretching measuring device, which comprises a bolt and a rigidity measuring rod; a through hole is processed along the central axis of the bolt, and the tail of the through hole is tapped; the rigid measuring rod is of a solid rod-shaped structure, and external threads are processed at the tail part of the rigid measuring rod; the rigidity measuring rod is arranged in a through hole of the bolt and is connected with the bolt through threads. The utility model discloses keep mutual independence between rigidity measuring stick and bolt, not take place deformation along with the tensile of bolt, through the distance of bolt head and measuring stick head around the bolt is tensile relatively, can realize the accurate measurement of bolt elongation, and be not limited to bolt installation environment and installation direction, measurement accuracy is high, convenient operation.
Description
Technical Field
The utility model belongs to the technical field of the stretching bolt, concretely relates to from stretching bolt of taking elongation measuring device.
Background
Although the standard of the bolt fastening force of the turbine bearing is calculated according to the elongation, the measurement cannot be carried out because one end of the bolt is screwed into the bearing seat in the actual execution. In addition, the foundation bolts of the generator penetrate through the platform of the steam turbine, and the actual length of the foundation bolts cannot be measured, so that the bolt tightening force is estimated according to the oil pressure when the bolts are fastened, and the actual tightening force is inaccurate.
At present, the elongation of the bolt is mostly measured by measuring the total length of the bolt before and after stretching by using an outside micrometer and then taking a difference value, and the method is limited to the condition that the total length of the bolt is less than 1m and the whole section of the bolt has no obstacle so that the outside micrometer is easy to erect and measure. And under the condition that the total length of the bolt is more than 1m or the outside micrometer cannot be erected due to the influence of environment, the method for measuring the elongation of the bolt by the methods of oil pressure, thread number calculation and the like is not accurate.
Disclosure of Invention
An object of the utility model is to provide a from tensile bolt of taking elongation measuring device realizes the accurate measurement of the tensile bolt of hydraulic pressure.
The technical scheme of the utility model as follows:
a stretching bolt with an elongation measuring device comprises a bolt and a rigidity measuring rod;
a through hole is processed along the central axis of the bolt, and the tail of the through hole is tapped;
the rigid measuring rod is of a solid rod-shaped structure, and external threads are processed at the tail part of the rigid measuring rod;
the rigidity measuring rod is arranged in a through hole of the bolt and is connected with the bolt through threads.
The rigidity measuring rod and the bolt have a height difference.
And (3) coating antirust oil in a gap between the rigid measuring rod and the bolt to prevent corrosion.
The diameter of the rigidity measuring rod is smaller than the diameter of the central through hole of the bolt by 2-4 mm.
The machining precision of the rigid measuring rod and the end face of the bolt head is less than or equal to 0.02 mm.
The rigidity measuring rod does not deform along with stretching of the bolt, a fixed measuring point is selected at the head of the bolt before stretching, and accurate measurement of the elongation of the bolt can be realized by comparing the distance between the head of the bolt and the head of the rigidity measuring rod before and after stretching.
The utility model discloses a show the effect and lie in:
the utility model discloses keep mutual independence between rigidity measuring stick and bolt, not take place deformation along with the tensile of bolt, through the distance of bolt head and measuring stick head around the bolt is tensile relatively, can realize the accurate measurement of bolt elongation, and be not limited to bolt installation environment and installation direction, measurement accuracy is high, convenient operation.
In addition, the rigidity measuring rod and the bolt are detachably assembled through threads, and irregular maintenance or replacement and the like are facilitated.
Drawings
Fig. 1 is a schematic view of a tension bolt structure.
In the figure: 1. a bolt; 2. a rigidity measuring bar.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
A tension bolt with an elongation measuring device as shown in fig. 1 comprises a bolt 1 and a rigidity measuring rod 2.
And a through hole is processed along the central axis of the bolt 1, and the tail part of the through hole is tapped.
The rigidity measuring rod 2 is of a solid rod-shaped structure, and external threads are machined at the tail of the rigidity measuring rod.
The rigidity measuring rod 2 is arranged in a through hole of the bolt 1 and is connected with the bolt through threads.
The diameter of the rigidity measuring rod 2 is smaller than the diameter of a central through hole of the bolt 1 by 2-4 mm, and the rigidity measuring rod 2 and the bolt 1 have a height difference, so that the micrometer is convenient to measure.
The processing precision of the rigid measuring rod 2 and the end face of the head of the bolt 1 is less than or equal to 0.02mm, so that the measuring error is reduced.
And (3) coating rust preventive oil in a gap between the rigid measuring rod 2 and the bolt 1 to prevent corrosion.
The rigidity measuring rod 2 does not deform along with stretching of the bolt 1, a fixed measuring point is selected at the head of the bolt 1 before stretching, accurate measurement of the elongation of the bolt 1 can be realized by comparing the distance between the head of the bolt 1 before and after stretching and the head of the rigidity measuring rod 2, and the method is not limited to the installation environment and the installation direction of the bolt 1.
Claims (5)
1. The utility model provides a from tensile bolt of taking elongation measuring device which characterized in that: comprises a bolt (1) and a rigidity measuring rod (2);
a through hole is processed along the central axis of the bolt (1), and the tail of the through hole is tapped;
the rigid measuring rod (2) is of a solid rod-shaped structure, and external threads are processed at the tail part of the rigid measuring rod;
the rigidity measuring rod (2) is arranged in a through hole of the bolt (1) and is connected with the bolt through threads.
2. A tension bolt with an elongation measuring device as defined in claim 1, wherein: the rigidity measuring rod (2) and the bolt (1) have a height difference.
3. A tension bolt with an elongation measuring device in accordance with claim 2, wherein: and (3) coating anti-rust oil in a gap between the rigidity measuring rod (2) and the bolt (1) to prevent corrosion.
4. A tension bolt with elongation measuring device in accordance with claim 3, wherein: the diameter of the rigidity measuring rod (2) is 2-4 mm smaller than that of the central through hole of the bolt (1).
5. A tension bolt with elongation measuring device in accordance with claim 4, wherein: the processing precision of the rigidity measuring rod (2) and the end face of the head of the bolt (1) is less than or equal to 0.02 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023140211.5U CN214698697U (en) | 2020-12-23 | 2020-12-23 | From tensile bolt of taking elongation measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023140211.5U CN214698697U (en) | 2020-12-23 | 2020-12-23 | From tensile bolt of taking elongation measuring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214698697U true CN214698697U (en) | 2021-11-12 |
Family
ID=78559205
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023140211.5U Active CN214698697U (en) | 2020-12-23 | 2020-12-23 | From tensile bolt of taking elongation measuring device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214698697U (en) |
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2020
- 2020-12-23 CN CN202023140211.5U patent/CN214698697U/en active Active
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