CN211178225U - Tool for accurately measuring stretching elongation value of steel strand - Google Patents
Tool for accurately measuring stretching elongation value of steel strand Download PDFInfo
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- CN211178225U CN211178225U CN201921869676.9U CN201921869676U CN211178225U CN 211178225 U CN211178225 U CN 211178225U CN 201921869676 U CN201921869676 U CN 201921869676U CN 211178225 U CN211178225 U CN 211178225U
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Abstract
The utility model relates to a tool for accurately measuring the stretching elongation value of a steel strand, belonging to the technical field of measuring devices; the tool for accurately measuring the tension elongation value of the steel strand comprises a steel plate ruler, a steel plate sleeve, nuts and fastening bolts, wherein the steel plate sleeve is sleeved on the prestressed steel strand, through holes are uniformly formed in the steel plate sleeve, the nuts are welded on the outer side of the steel plate sleeve along the through holes, the fastening bolts extending into the steel plate sleeve are in threaded connection with the nuts, and the steel plate ruler is vertically arranged on the steel plate sleeve; the utility model discloses an utilize pretightning force and friction principle, through fastening bolt connection steel casing pipe and prestress wire, the steel plate chi is fixed on the steel casing pipe, and the horizontal distance between through measuring the steel plate chi and measuration datum point reachs the stretch-draw elongation value of prestress wire. The tool has the characteristics of simple structure, convenient manufacture, easy operation and strong applicability, and can accurately measure the tension elongation value of the steel strand.
Description
Technical Field
The utility model relates to an instrument of accurate measurement steel strand wires stretch-draw elongation value belongs to measuring device technical field.
Background
In recent years, with the rapid development of a prestressed bridge construction process and the advantages of good integrity, large structural rigidity, small deformation, high driving comfort and the like of a prestressed concrete bridge, the prestressed concrete bridge is widely applied to municipal engineering, highway and railway engineering; in the construction process of precast beams and cast-in-place beams, prestress tensioning is a very critical work, the deviation between the actual elongation value and the theoretical elongation value of prestress strand tensioning is not allowed to exceed +/-6% according to the standard requirement, the accurate measurement method and the measurement result of the actual elongation value are very important, and the calculation result is greatly influenced. However, when measuring the tensile elongation value, the traditional method is to measure the tensile elongation value of the steel strand in a way of marking the steel strand, and the method is not easy to find a reference point in the measuring process and is easy to generate human errors.
SUMMERY OF THE UTILITY MODEL
In order to overcome the problem that exists among the background art, the utility model discloses an utilize pretightning force and friction principle, through fastening bolt connection steel casing pipe and prestress wire, the steel plate chi is fixed on the steel casing pipe, and the horizontal distance through measuring the steel plate chi and measuring between the benchmark reachs the stretch-draw elongation value of prestress wire. The tool has the characteristics of simple structure, convenient manufacture, easy operation and strong applicability, and can accurately measure the tension elongation value of the steel strand.
In order to overcome the problem that exists among the background art, for solving above-mentioned problem, the utility model discloses a following technical scheme realizes:
the tool for accurately measuring the stretching elongation value of the steel strand comprises a steel plate ruler, a steel plate sleeve, a nut and a fastening bolt, wherein the steel plate sleeve is sleeved on the prestressed steel strand, through holes are uniformly formed in the steel plate sleeve, the nut is welded on the outer side of the steel plate sleeve along the through holes, the fastening bolt extending into the steel plate sleeve is connected to the nut in a threaded mode, and the steel plate ruler is vertically arranged on the steel plate sleeve.
Preferably, the steel plate ruler is parallel to the box girder surface.
The utility model has the advantages that:
the utility model discloses an utilize pretightning force and friction principle, through fastening bolt connection steel casing pipe and prestress wire, the steel plate chi is fixed on the steel casing pipe, and the horizontal distance between through measuring the steel plate chi and measuration datum point reachs the stretch-draw elongation value of prestress wire. The tool has the characteristics of simple structure, convenient manufacture, easy operation and strong applicability, and can accurately measure the tension elongation value of the steel strand.
Drawings
FIG. 1 is a schematic structural view of the present invention;
fig. 2 is a schematic cross-sectional view of the present invention.
The reference numbers in the figures are: 1-steel plate ruler, 2-steel plate sleeve, 3-nut, 4-fastening bolt, 5-prestress steel strand, 6-tensioning jack, 7-measuring datum point and 8-box girder.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the following will explain in detail a preferred embodiment of the present invention with reference to the accompanying drawings to facilitate understanding of the skilled person.
As shown in fig. 1-2, the tool for accurately measuring the tensile elongation value of the steel strand comprises a steel plate ruler 1, a steel plate sleeve 2, a nut 3 and a fastening bolt 4, the steel plate sleeve 2 is sleeved on the prestressed steel strand 5, through holes are uniformly arranged on the steel plate sleeve 2, and the outer side of the steel plate sleeve 2 is welded with a nut 3 along the through hole, the nut 3 is connected with a fastening bolt 4 extending into the steel plate sleeve 2 by screw thread, the steel plate sleeve 2 is fixed relative to the prestressed steel strand 5 by fastening the fastening bolt 4 and pressing the tail part of the fastening bolt 4 on the prestressed steel strand 5, the steel plate ruler 1 is vertically arranged on the steel plate sleeve 2, the steel plate ruler 1 and the box girder 8 surface are parallel to each other, the reference point from the steel plate ruler 1 to the box girder 8 surface (T girder) is a measuring reference line, and obtaining the tension elongation value of the prestressed steel strand 5 by measuring the horizontal distance between the steel plate ruler 1 and the measuring reference point.
The utility model discloses a working process: sleeving the steel plate sleeve 2 on the prestressed steel strand 5, enabling the steel plate ruler 1 on the steel plate sleeve 2 to be in a vertical state, fastening through the fastening bolt 4, starting the tensioning jack 6 to work, and obtaining the tensioning elongation value of the prestressed steel strand 5 by measuring the horizontal distance between the steel plate ruler 1 and the measuring reference point.
The utility model discloses an utilize pretightning force and friction principle, through fastening bolt connection steel casing pipe and prestress wire, the steel plate chi is fixed on the steel casing pipe, and the horizontal distance between through measuring the steel plate chi and measuration datum point reachs the stretch-draw elongation value of prestress wire. The tool has the characteristics of simple structure, convenient manufacture, easy operation and strong applicability, and can accurately measure the tension elongation value of the steel strand.
Finally, it is noted that the above-mentioned preferred embodiments illustrate rather than limit the invention, and that, although the invention has been described in detail with reference to the above-mentioned preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the scope of the invention as defined by the appended claims.
Claims (2)
1. The utility model provides a tool of accurate measurement steel strand stretching elongation value which characterized in that: the tool for accurately measuring the stretching elongation value of the steel strand comprises a steel plate ruler, a steel plate sleeve, a nut and a fastening bolt, wherein the steel plate sleeve is sleeved on the prestressed steel strand, through holes are uniformly formed in the steel plate sleeve, the nut is welded on the outer side of the steel plate sleeve along the through holes, the fastening bolt extending into the steel plate sleeve is connected to the nut in a threaded mode, and the steel plate ruler is vertically arranged on the steel plate sleeve.
2. The tool for accurately measuring the tensile elongation of the steel strand as set forth in claim 1, wherein: the steel plate ruler is parallel to the box girder surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921869676.9U CN211178225U (en) | 2019-11-01 | 2019-11-01 | Tool for accurately measuring stretching elongation value of steel strand |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921869676.9U CN211178225U (en) | 2019-11-01 | 2019-11-01 | Tool for accurately measuring stretching elongation value of steel strand |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211178225U true CN211178225U (en) | 2020-08-04 |
Family
ID=71802058
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921869676.9U Active CN211178225U (en) | 2019-11-01 | 2019-11-01 | Tool for accurately measuring stretching elongation value of steel strand |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211178225U (en) |
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2019
- 2019-11-01 CN CN201921869676.9U patent/CN211178225U/en active Active
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