CN109945757B - Tool for measuring degree of wrinkling generated after pipe bending processing - Google Patents

Tool for measuring degree of wrinkling generated after pipe bending processing Download PDF

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CN109945757B
CN109945757B CN201910296870.0A CN201910296870A CN109945757B CN 109945757 B CN109945757 B CN 109945757B CN 201910296870 A CN201910296870 A CN 201910296870A CN 109945757 B CN109945757 B CN 109945757B
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vernier
head
main
ruler
main scale
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CN109945757A (en
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姜洋
鹿松
陈伟星
李来新
潘婷婷
安文斌
汪金海
陈诗瑶
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Sanmen Nuclear Power Co Ltd
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Sanmen Nuclear Power Co Ltd
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Abstract

A tool for measuring the degree of wrinkling generated after pipe bending processing belongs to the technical field of measuring tools. The tool comprises a first main scale, a second main scale, a third main scale, a transverse scale, a first vernier drum, a second vernier drum and a third vernier drum; the first main scale is sleeved in the first vernier barrel to form a first measuring assembly; the second main scale is sleeved in the second vernier barrel to form a second measuring assembly; the third main scale is sleeved in the third vernier barrel to form a third measuring assembly; the first measuring assembly and the second measuring assembly are respectively arranged at two sides of the third measuring assembly; the two ends of the transverse ruler are respectively connected with the first vernier drum and the second vernier drum, so that the first vernier drum moves along the length direction of the transverse ruler to adjust the distance between the first vernier drum and the third vernier drum, and the second vernier drum moves along the length direction of the transverse ruler to adjust the distance between the second vernier drum and the third vernier drum; the middle part of the transverse ruler is connected with the third vernier drum, so that the transverse ruler can move along the length direction of the third vernier drum. The invention can rapidly complete the measurement of the parameter for calculating the degree of wrinkles and has high detection efficiency.

Description

Tool for measuring degree of wrinkling generated after pipe bending processing
Technical Field
The invention belongs to the technical field of measurement, and particularly relates to a tool for measuring the degree of wrinkling generated after pipe bending processing.
Background
The prefabrication of partial pile type nuclear island pipelines in the nuclear power station construction refers to the American PFI specification, the pipeline bending machine is required to meet the PFI ES-3 and PFI ES-24, the technical requirements of the bending machine are more detailed and stricter than those of the domestic specification, and a nuclear island designer relies on a model in the pipeline arrangement design, so that a large number of bent pipe designs and domestic manufacturing capacity are misplaced, and challenges are brought to the prefabrication and installation work on site.
According to PFI standard ES-24, the degree of wrinkling after bending of the pipe should be as follows: the minimum ratio of the distance A between adjacent peaks to the height difference Depth from the peak to the trough is more than or equal to 12:1, and the following formula is shown in detail.
In actual operation, the actual measurement of the degree of wrinkles generated after the pipe bending process is complicated and difficult, and meanwhile, a large number of bending pipes are required to measure the degree of wrinkles.
Therefore, it is necessary to invent a tool for measuring the degree of wrinkles generated after the pipe bending process. The tool can be used for rapidly measuring the fold degree generated after the pipe bending processing to calculate the required parameters, and whether the design requirement is met or not is calculated through a formula.
The invention patent application CN201810367201.3 discloses a device and a method for measuring the bending angle of a pressure-bearing pipeline, and particularly discloses a device which comprises a conical angle ruler and at least two lasers for emitting laser beams in a cross shape, wherein the lasers are detachably connected with the straight pipe part; the conical angle ruler comprises a cone-shaped angle ruler body and a plurality of angle scales arranged on the angle ruler body along the generatrix direction of the cone; the laser comprises a laser body for generating and emitting laser beams, and a positioning part which is arranged on the laser body and detachably connected with the straight pipe part, wherein the laser beams emitted by the laser body are parallel to the straight pipe part after the positioning part is connected with the straight pipe part. The invention is mainly used for measuring the bending angle of the pipeline and can not measure the degree of folds generated after the bending processing of the pipeline.
Disclosure of Invention
The invention provides a tool for measuring the degree of wrinkles generated after pipe bending processing, aiming at the problems in the prior art, and can solve the problem that the degree of wrinkles generated after pipe bending processing is difficult to measure.
The invention is realized by the following technical scheme:
The invention provides a tool for measuring the degree of wrinkling generated after pipe bending processing, which comprises a first main scale, a second main scale, a third main scale, a transverse scale, a first vernier cylinder, a second vernier cylinder and a third vernier cylinder; the first main scale is sleeved in the first vernier barrel to form a first measuring assembly, and the first main scale can move along the length direction of the first vernier barrel; the second main scale is sleeved in the second vernier barrel to form a second measuring assembly, and the second main scale can move along the length direction of the second vernier barrel; the third main ruler is sleeved in the third vernier barrel to form a third measuring assembly, and the third main ruler can move along the length direction of the third vernier barrel; the first measuring assembly and the second measuring assembly are respectively arranged at two sides of the third measuring assembly; the two ends of the transverse ruler are respectively connected with the first vernier drum and the second vernier drum, so that the distance between the first vernier drum and the third vernier drum can be adjusted by moving the first vernier drum along the length direction of the transverse ruler, and the distance between the second vernier drum and the third vernier drum can be adjusted by moving the second vernier drum along the length direction of the transverse ruler; the middle part of the transverse ruler is connected with the third vernier drum, so that the transverse ruler can move along the length direction of the third vernier drum.
According to the invention, the first main scale and the second main scale are utilized to measure the length of the crest of the generated fold degree after the pipeline is bent, namely OD1 and OD3 in the formula; the third main rule is also used for measuring the length of the trough of the folding degree generated after the pipe is bent, namely OD2 in the formula; and measuring the distance between adjacent wave crests of the generated fold degree after the pipe is bent by using a transverse ruler, namely A in the formula. The method and the device can be suitable for measuring the degree of folds, can quickly obtain parameters for calculating the degree of folds, and further can quickly calculate the degree of folds.
Preferably, the tool further comprises a first sliding rail screw, a second sliding rail screw and a sliding block; the upper end of the third vernier cylinder is provided with a sliding rail along the length direction of the vernier cylinder; the transverse ruler is provided with a middle hole in the middle part and strip-shaped sliding grooves arranged on two sides of the middle hole; the first sliding rail screw is used for being screwed into the first vernier cylinder, and the second sliding rail screw is used for being screwed into the second vernier cylinder; the strip-shaped sliding grooves on two sides of the transverse ruler are aligned with the first sliding rail screw and the second sliding rail screw respectively, and the first sliding rail screw and the second sliding rail screw are fixed in the strip-shaped sliding grooves through nuts; the sliding block is arranged below the transverse ruler and aligned with the middle hole, and is fixed with the middle hole through a nut; the sliding block is used for moving on the sliding rail.
Preferably, the tool further comprises a fastening barrel for screwing into the third cursor barrel tail.
Preferably, the first vernier cylinder, the second vernier cylinder and the third vernier cylinder are respectively provided with a visual window for observing scales on the first main scale, the second main scale and the third main scale.
Preferably, the tool further comprises a main scale extension rod, one end of the main scale extension rod is used for being sleeved into the third vernier drum, and the other end of the main scale extension rod is connected with the third main scale.
Preferably, a flange is arranged at one end of the main scale extension rod connected with the third main scale; the third main scale rod is provided with a concave part, and the concave part is used for screwing and fixing the flange extending into the concave part.
Preferably, the tool further comprises a ruler head extension sleeve and a fixing pin; the ruler head extension sleeve is used for being sleeved outside the ruler heads of the first main ruler or the second main ruler or the third main ruler, and the fixed pin penetrates through the ruler head extension sleeve to be fixed with the insertion holes corresponding to the first main ruler or the second main ruler and the third main ruler.
Preferably, the first main scale comprises a first main scale head and a first main scale bar; the second main scale comprises a second main scale head and a second main scale rod; the third main scale comprises a third main scale head and a third main scale rod; the first vernier cylinder comprises a first vernier head and a first vernier cylinder; the second vernier cylinder comprises a second vernier head and a second vernier cylinder; the third vernier drum comprises a third vernier head and a third vernier drum body; the first main ruler is sleeved in the first vernier cylinder, the first main ruler head can be attached to the first vernier head, and the first main ruler head and the first vernier head are used for clamping a pipeline; the second main ruler is sleeved in the second vernier cylinder, the second main ruler head can be attached to the second vernier head, and the second main ruler head and the second vernier head are used for clamping a pipeline; the third main scale is sleeved in the third vernier barrel, the third main scale head can be attached to the third vernier scale head, and the third main scale head and the third vernier scale head are used for clamping a pipeline.
Preferably, the first main scale head is perpendicular relative to the first main scale bar, the second main scale head is perpendicular relative to the second main scale bar, and the third main scale head is perpendicular relative to the third main scale bar; the first vernier head is vertical relative to the first vernier cylinder, the second vernier head is vertical relative to the second vernier cylinder, and the third vernier head is vertical relative to the third vernier cylinder.
Preferably, the first main scale head comprises a connecting scale part connected with the first main scale rod and two clamping scale parts extending downwards from the connecting scale part; a spacing space is reserved between the two clamping ruler parts; the second main scale head, the third main scale head, the first vernier scale head, the second vernier scale head and the third vernier scale head have the same structure as the first main scale head.
The invention has the following beneficial effects:
according to the tool for measuring the degree of folds generated after the pipe bending processing, the measurement of parameters for calculating the degree of folds can be completed rapidly, and the detection efficiency is improved; the measuring ruler can be quickly replaced according to the diameter of the measuring pipeline so as to adapt to various pipe diameters.
Drawings
FIG. 1 is a schematic diagram of a prior art calculation of the degree of wrinkling after bending of a pipe;
FIG. 2 is an exploded view of a tool for measuring the degree of wrinkling during pipe bending in accordance with the present invention;
FIG. 3 is a schematic view of a tool for measuring the degree of wrinkling during pipe bending operation according to the present invention.
Detailed Description
The following are specific embodiments of the present invention and the technical solutions of the present invention will be further described with reference to the accompanying drawings, but the present invention is not limited to these embodiments.
Referring to fig. 2, a tool for measuring the degree of wrinkling of a pipe after bending comprises a first main scale 10, a second main scale 20, a third main scale 30, a transverse scale 5, a first vernier drum 40, a second vernier drum 50, and a third vernier drum 60. The first main scale 10 is sleeved in the first vernier drum 40 to form a first measuring assembly, and the first main scale 10 can move along the length direction of the first vernier drum 40. The second main scale 20 is sleeved in the second vernier drum 50 to form a second measuring assembly, and the second main scale 20 can move along the length direction of the second vernier drum 40. The third main scale 30 is sleeved in the third vernier drum 60 to form a third measuring assembly, and the third main scale 30 can move along the length direction of the third vernier drum 60. The first measuring assembly and the second measuring assembly are respectively arranged on two sides of the third measuring assembly, the first measuring assembly and the second measuring assembly are used for measuring the length of a corrugation crest generated after the pipeline is bent, and the third measuring assembly is used for measuring the length of a corrugation trough generated after the pipeline is bent. The two ends of the transverse ruler 5 are respectively connected with the first vernier drum 40 and the second vernier drum 50, so that the distance between the first vernier drum 40 and the third vernier drum 60 can be adjusted by moving the first vernier drum 40 along the length direction of the transverse ruler 5, and the distance between the second vernier drum 50 and the third vernier drum 60 can be adjusted by moving the second vernier drum 50 along the length direction of the transverse ruler 5. The middle part of the transverse ruler 5 is connected with the third vernier drum 60, so that the transverse ruler 5 can move along the length direction of the third vernier drum 60. The transverse ruler 5 is used for measuring the distance between adjacent wave crests of the generated fold degree after the pipeline is bent.
Specifically, the tool of the invention further comprises a first slide rail screw 11, a second slide rail screw 21 and a sliding block 7. The upper end of the third vernier drum 60 is provided with a sliding rail 61 along the length direction of the vernier drum. The transverse ruler 5 is provided with a middle hole 51 at the middle part thereof and strip-shaped sliding grooves 52 arranged at two sides of the middle hole 51. The first sliding rail screw 11 is used for being screwed into the hole above the first vernier drum 40, and the second sliding rail screw 21 is used for being screwed into the hole above the second vernier drum 50, so that the first measuring assembly and the second measuring assembly are mounted. The bar-shaped sliding grooves 52 on the two sides of the transverse ruler 5 are aligned with the first sliding rail screw 11 and the second sliding rail screw 21 respectively, namely the first sliding rail screw 11 and the second sliding rail screw 21 respectively pass through the aligned bar-shaped sliding grooves, and then the first sliding rail screw 11 and the second sliding rail screw 21 are fixed in the bar-shaped sliding grooves 52 through the nuts 6. In this way, the mounting of the two ends of the transverse ruler 5 with the first measuring assembly and the second measuring assembly is completed. The slide 7 is arranged below the transverse ruler 5 and aligned with the middle hole 51, and the slide 7 is fixed with the middle hole 51 through the nut 6. The slide 7 is intended to move on the slide rail 61.
Specifically, the first main scale 10 includes a first main scale head 12 and a first main scale bar 13. The first main scale head 12 is perpendicular relative to the first main scale bar 13. The first vernier 40 includes a first vernier head 41 and a first vernier body 42. The first main ruler rod 13 is sleeved in the first cursor cylinder 42 and can move along the length direction of the first cursor cylinder 42. When the first main scale 1 is sleeved in the first vernier drum 40, the first main scale head 12 can be attached to the first vernier head 41. The first main scale head 12 is matched with the first vernier scale head 41, and the distance between the first main scale head and the first vernier scale head is adjusted according to the pipe diameter size so as to be used for clamping a pipeline. Further, the first main scale head 12 includes a connecting scale portion 121 connected to the first main scale bar 13, and two holding scale portions 122 extending downward from the connecting scale portion 121. The first vernier head 41 also has the same structure as the first main scale head 12. A space is reserved between the two clamping ruler parts 122, and the space is convenient for adjusting the reserved space for clamping the tightness of the pipeline. When the pipe is clamped between a clamping rule portion of the first main rule head 12 and a clamping rule portion of the first vernier rule head, since the pipe generates a reaction force to the clamping rule portion due to the clamping force, one clamping rule portion of the first main rule head 12 approaches the other clamping rule portion, and one clamping rule portion of the first vernier rule head approaches the other clamping rule portion, so that the first main rule head and the first vernier rule head do not need to bear excessive pressure, and the clamping stability can be ensured.
Similarly, the second main scale 20 and the third main scale 30 have the same structure as the first main scale 10. The second main scale includes a second main scale head and a second main scale bar, the second main scale head being perpendicular relative to the second main scale bar. The third main scale includes a third main scale head and a third main scale bar, the third main scale head being perpendicular relative to the third main scale bar. The second cursor cylinder 50 and the third cursor cylinder 60 also have the same structure as the first cursor cylinder 40. The second vernier drum 50 includes a second vernier head and a second vernier drum, and the second vernier head is perpendicular to the second vernier drum. The third vernier drum 60 includes a third vernier head and a third vernier drum, and the third vernier head is perpendicular to the third vernier drum. When the second main scale 20 is sleeved in the second vernier drum 50, the second main scale head and the second vernier scale head can be attached. The second main scale head is matched with the second vernier scale head, the distance between the second main scale head and the second vernier scale head is adjusted according to the pipe diameter size, and then the second main scale head and the second vernier scale head are used for clamping a pipeline. When the third main scale 30 is sleeved in the second vernier drum 60, the second main scale head and the second vernier scale head can be attached. The second main scale head is matched with the second vernier scale head, the distance between the second main scale head and the second vernier scale head is adjusted according to the pipe diameter size, and then the second main scale head and the second vernier scale head are used for clamping a pipeline. Further, the second main rule head, the third main rule head, the second vernier rule head and the third vernier rule head have the same structure as the first main rule head. Each ruler head is provided with two ruler head clamping parts, and a spacing space is reserved between the two ruler head clamping parts.
The first main scale 10, the second main scale 20, the third main scale 30, and the transverse scale 5 have scales, and the first vernier drum 40, the second vernier drum 50, and the third vernier drum 60 are respectively provided with a visual window for observing the scales on the first main scale 10, the second main scale 20, and the third main scale 30.
The tool of the present invention further comprises a fastening barrel 8 for screwing into the tail of said third cursor barrel 60. The fastening barrel 8 is provided with threads, is matched with the tail threads of the third vernier barrel 60, and is tightly matched through threads. Specifically, the fastening barrel 8 includes a barrel body and a barrel cover, the barrel body is screwed with the tail of the third vernier barrel 60, the barrel cover is arranged at the end of the barrel body, and the size of the barrel cover is larger than that of the third vernier barrel 60, so that the part of the barrel cover higher than the third vernier barrel can limit the sliding block to slide out of the sliding rail. The through hole is formed in the middle of the cover, so that the third main scale can conveniently pass through the through hole of the cover when moving relative to the third vernier drum 60 (see fig. 3), and the third vernier drum can be flexibly moved along with the lengthening of the length of the third main scale.
When it is desired to lengthen the length of the main scale, the tool of the invention also comprises a main scale extension bar 9. One end of the main scale extension rod 9 is used for being sleeved into the third vernier barrel 60, and the other end of the main scale extension rod is connected with the third main scale 30. Specifically, the end of the main scale extension bar 9, to which the third main scale 30 is connected, is provided with a flange 91, and the third main scale 30 is provided with a recess (not shown in the drawings). The flange is provided with external threads, the concave part is provided with internal threads, and when the flange extends into the concave part, the threads are matched and screwed down for fixation. Similarly, the main scale extension rod 9 can also be sleeved between the second vernier drum 50 and the second main scale 20 or between the first vernier drum 40 and the first main scale 10, so as to lengthen the measurement length of the first measurement assembly and the second measurement assembly.
When the length of the ruler head needs to be prolonged, the tool also comprises a ruler head extending sleeve 1 and a fixing pin 2. The ruler head extension sleeve 1 is used for being sleeved outside the ruler heads of the first main ruler 10 or the second main ruler 20 or the third main ruler 30, and is fixed through the fixed pin 2 and penetrates through the ruler head extension sleeve 1 to be corresponding to the jack 3 of the first main ruler 10 or the second main ruler 20 or the third main ruler 30. The tape head extension sleeve 1 specifically comprises a connecting portion 101 and a clamping portion 102. The connecting portion 101 is hollow, and the side wall has a protruding column 1011, which is disposed along the length direction of the connecting portion, and is limited in the gap between the two clamping ruler portions when the two clamping ruler portions of the first main ruler extend into the connecting portion 101. The clamping part 102 is arranged below the connecting part 101, and can have a structure similar to that of the clamping end surface of the clamping ruler part of the first main ruler, so that the pipeline can be clamped conveniently.
When the first measuring assembly and the second measuring assembly are used for measuring, scales are marked on respective ruler rods of the first main ruler and the second main ruler, the first main ruler and the second main ruler can slide in the corresponding first vernier barrel and second vernier barrel, the main ruler and the vernier head are used for clamping an item, and the scales are checked through a visual window to confirm the length of the clamped item. The first measuring component and the second measuring component are used for measuring the crest length (namely OD1 and OD3 in the formula) of the generated fold degree after the pipeline is bent.
When the third measuring assembly is used for measuring, scales are marked on the ruler rod of the third main ruler and can slide in the third vernier barrel, the main ruler and the vernier rod head are used for clamping items, the scales are checked through the visual window to confirm the length of the clamping items, and the third main ruler is used for measuring the length of a folding degree trough (namely, OD2 in a formula) generated after the pipeline is bent.
When the transverse ruler is used for measuring, scales are marked on the transverse ruler, the distance and the direction between the first measuring assembly and the second measuring assembly and the distance between the third measuring assembly and the telescopic distance can be adjusted after the assembly is completed, meanwhile, the distance between the two rulers can be determined according to the positions of the first measuring assembly and the second measuring assembly on the transverse ruler, and the transverse ruler is used for measuring the distance between adjacent peaks of the folding degree generated after the pipeline is bent (namely, A in the formula).
Referring to fig. 3, when the bending degree measurement is performed after the pipe bending process, the third measuring assembly of the tool 100 of the present invention is clamped to the position of the trough of the pipe 200, and two adjacent wave crest positions of the pipe 200 are found and clamped by adjusting the positions and directions of the first and second measuring assemblies on the transverse ruler and the position of the transverse ruler on the third measuring assembly. And respectively reading the data on the measuring scales of the first, second and third measuring assemblies and the distance between the left measuring scale and the right measuring scale on the transverse scale. And then according to a formula, whether the degree of wrinkles meets the requirement is calculated and compared. If the length of the measuring ruler and the ruler head is insufficient, the main ruler extension rod and the ruler head extension sleeve can be added according to the situation.
It will be appreciated by persons skilled in the art that the embodiments of the invention described above and shown in the drawings are by way of example only and are not limiting. The objects of the present invention have been fully and effectively achieved. The functional and structural principles of the present invention have been shown and described in the examples and embodiments of the invention may be modified or practiced without departing from the principles described.

Claims (10)

1. The tool for measuring the degree of wrinkling generated after the pipe bending processing is characterized by comprising a first main scale, a second main scale, a third main scale, a transverse scale, a first vernier cylinder, a second vernier cylinder and a third vernier cylinder; the first main scale is sleeved in the first vernier barrel to form a first measuring assembly, and the first main scale can move along the length direction of the first vernier barrel; the second main scale is sleeved in the second vernier barrel to form a second measuring assembly, and the second main scale can move along the length direction of the second vernier barrel; the third main ruler is sleeved in the third vernier barrel to form a third measuring assembly, and the third main ruler can move along the length direction of the third vernier barrel; the first measuring assembly and the second measuring assembly are respectively arranged at two sides of the third measuring assembly; the two ends of the transverse ruler are respectively connected with the first vernier drum and the second vernier drum, so that the distance between the first vernier drum and the third vernier drum can be adjusted by moving the first vernier drum along the length direction of the transverse ruler, and the distance between the second vernier drum and the third vernier drum can be adjusted by moving the second vernier drum along the length direction of the transverse ruler; the middle part of the transverse ruler is connected with the third vernier drum, so that the transverse ruler can move along the length direction of the third vernier drum; when the tool is used for measuring the degree of folds generated after the pipe bending processing, the third measuring assembly is used for clamping the trough position of the pipe, and the positions of the first measuring assembly, the second measuring assembly, the transverse ruler and the transverse ruler on the third measuring assembly are adjusted to find the positions of two adjacent wave crests of the pipe and clamped by the first measuring assembly and the second measuring assembly; the first measuring component and the second measuring component are used for measuring the crest length of the generated fold degree after the pipeline is bent; the third measuring assembly is used for measuring the length of a trough with the degree of folds generated after the pipeline is bent; the transverse ruler is used for measuring the distance between adjacent wave crests of the generated fold degree after the pipeline is bent.
2. The tool for measuring the degree of wrinkling after pipe bending according to claim 1, further comprising a first rail screw, a second rail screw, and a slider; the upper end of the third vernier cylinder is provided with a sliding rail along the length direction of the vernier cylinder; the transverse ruler is provided with a middle hole in the middle part and strip-shaped sliding grooves arranged on two sides of the middle hole; the first sliding rail screw is used for being screwed into the first vernier cylinder, and the second sliding rail screw is used for being screwed into the second vernier cylinder; the strip-shaped sliding grooves on two sides of the transverse ruler are aligned with the first sliding rail screw and the second sliding rail screw respectively, and the first sliding rail screw and the second sliding rail screw are fixed in the strip-shaped sliding grooves through nuts; the sliding block is arranged below the transverse ruler and aligned with the middle hole, and is fixed with the middle hole through a nut; the sliding block is used for moving on the sliding rail.
3. The tool for measuring the degree of wrinkling after pipe bending according to claim 1, further comprising a fastening barrel for threading into the tail of the third vernier barrel.
4. The tool for measuring the degree of wrinkling after pipe bending machining according to claim 1, wherein the first vernier barrel, the second vernier barrel and the third vernier barrel are respectively provided with visual windows for observing scales on the first main scale, the second main scale and the third main scale.
5. The tool for measuring the degree of wrinkling after pipe bending process according to claim 1, further comprising a main scale extension rod, wherein one end of the main scale extension rod is used for being sleeved into the third vernier cylinder, and the other end of the main scale extension rod is connected with the third main scale.
6. The tool for measuring the degree of wrinkling after pipe bending process according to claim 5, wherein the end of the main scale extension bar connected with the third main scale is provided with a flange; the third main scale rod is provided with a concave part, and the concave part is used for screwing and fixing the flange extending into the concave part.
7. The tool for measuring the degree of wrinkling after pipe bending process according to claim 1, further comprising a ruler head extension sleeve and a fixing pin; the ruler head extension sleeve is used for being sleeved outside the ruler heads of the first main ruler or the second main ruler or the third main ruler, and the fixed pin penetrates through the ruler head extension sleeve to be fixed with the insertion holes corresponding to the first main ruler or the second main ruler and the third main ruler.
8. The tool for measuring a degree of wrinkling after pipe bending as defined in claim 1, wherein the first main scale includes a first main scale head and a first main scale shank; the second main scale comprises a second main scale head and a second main scale rod; the third main scale comprises a third main scale head and a third main scale rod; the first vernier cylinder comprises a first vernier head and a first vernier cylinder; the second vernier cylinder comprises a second vernier head and a second vernier cylinder; the third vernier drum comprises a third vernier head and a third vernier drum body; the first main ruler is sleeved in the first vernier cylinder, the first main ruler head can be attached to the first vernier head, and the first main ruler head and the first vernier head are used for clamping a pipeline; the second main ruler is sleeved in the second vernier cylinder, the second main ruler head can be attached to the second vernier head, and the second main ruler head and the second vernier head are used for clamping a pipeline; the third main scale is sleeved in the third vernier barrel, the third main scale head can be attached to the third vernier scale head, and the third main scale head and the third vernier scale head are used for clamping a pipeline.
9. The tool for measuring a degree of wrinkling after pipe bending according to claim 8, wherein the first main rule head is perpendicular relative to the first main rule shank, the second main rule head is perpendicular relative to the second main rule shank, and the third main rule head is perpendicular relative to the third main rule shank; the first vernier head is vertical relative to the first vernier cylinder, the second vernier head is vertical relative to the second vernier cylinder, and the third vernier head is vertical relative to the third vernier cylinder.
10. The tool for measuring a degree of wrinkling after pipe bending as defined in claim 8, wherein the first main rule head includes a connecting rule portion connected to the first main rule bar and two clamping rule portions extending downwardly from the connecting rule portion; a spacing space is reserved between the two clamping ruler parts; the second main scale head, the third main scale head, the first vernier scale head, the second vernier scale head and the third vernier scale head have the same structure as the first main scale head.
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