CN203274650U - Measuring scale for bending radius of arc without circle center - Google Patents
Measuring scale for bending radius of arc without circle center Download PDFInfo
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- CN203274650U CN203274650U CN 201320216486 CN201320216486U CN203274650U CN 203274650 U CN203274650 U CN 203274650U CN 201320216486 CN201320216486 CN 201320216486 CN 201320216486 U CN201320216486 U CN 201320216486U CN 203274650 U CN203274650 U CN 203274650U
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Abstract
The utility model provides a measuring scale for the bending radius of an arc without a circle center. The measuring scale comprises a beam which is horizontally arranged, two ends of the beam are symmetrically connected with a left support leg and a right support leg, and the center of the beam is connected with an extension scale; the left support leg, the right support leg and the extension scale are vertical to the beam; the left support leg and the right support leg are equal in length and in distance to the center of the beam; and the extension scale moves up and down along a direction vertical to the beam. The tool in the utility model has the characteristics of being easy to manufacture, measure and master and the like; the position of the circle center of a workpiece does not need to be found out; manual measurement is allowed; observation and supervision are facilitated; and measurement can be performed in any state of the workpiece.
Description
Technical field
The utility model relates to a kind of plant equipment and measures measurer, and is especially a kind of without center of circle arc bend bilge radius dip stick.
Background technology
At present, the manufacturing of heavy caliber thick wall bend pipe adopt generally that intermediate frequency is curved, machining moulding, hot bending and clod wash.When wherein adopting intermediate frequency curved, the crooked circular arc nature forming of bend pipe, its bending radius is even, easy Measurement accuracy, but need the special-purpose curved equipment of intermediate frequency; When adopting machining moulding bend pipe, the bend pipe bending radius is even, and the easy Measurement accuracy of bending radius, but mechanical molding's bend pipe also need the special machine process equipment, and amount of machining is large, the time is long, and especially austenite stainless steel workpiece machine work difficulty is very big; When adopting hot bending, the bending radius of bend pipe energy basic guarantee is even, but needs the special hot pipe bending technique, and hot-bending pipe is high to the mould requirement simultaneously, and will carry out special shaping process.At present most domestic Heavy Machinery Plant adopts for the manufacturing of heavy caliber thick wall bend pipe the cold bending technology grasping and implement of being easy to.
During the pipeline clod wash, because the resistance of deformation of pipeline is large, loading force is subject to again the die size restriction, and the reasons such as pipeline material elasticity and plastic yield complexity, cause bend pipe to have ovality, the bend pipe cambered surface is imperfect arc surface, does not have clear and definite arcing point, sweep radius constantly to change.Because the bending radius of bend pipe constantly changes, there is not the continuous circular arc of a standard, can't find a public centre point.Therefore adopt traditional platform line mensuration, no matter measure inner arc side or the outer arc side of bend pipe, all because can't accurately finding the center of circle, thereby can't correct measurement go out the bending radius of bend pipe, and determine the method disunity in the bend pipe circular arc center of circle with the platform method of scoring, get a randomness larger, cause the measurement result deviation of different survey crews very large.
Adopt laser tracker or three-coordinates measuring machine to carry out multiple spot (at least 10 point) to bend pipe outer arc or inner arc and get point measurement, and measurement data is gone out immediate bend pipe circular arc and bending radius by computer fitting.But due to laser tracker or three-coordinates measuring machine expensive, and need the professional to operate, make general survey personnel and equipment Monitoring personnel be difficult to grasp and use.When getting before the simultaneous computer match, exist equally the people for getting a little, randomness is larger, the pipe bending radius poor repeatability that makes homogeneous computer fitting not go out.
Summary of the invention
The purpose of this utility model is to provide that a kind of simple, general personnel can grasp without center of circle arc measuring instrument.
Realize the technical scheme of the utility model purpose: a kind of it comprises a horizontally disposed crossbeam without center of circle arc bend bilge radius dip stick, is symmetrically connected with respectively left branch leg and right supporting leg at the two ends of crossbeam, is connected with shrinkage-rule in the crossbeam center; Described left branch leg, right supporting leg and shrinkage-rule are all and beam vertical; Left branch leg and right supporting leg are isometric, and left branch leg and right supporting leg equate to the distance at crossbeam center; Shrinkage-rule moves up and down along vertical crossbeam direction.
As above a kind of without center of circle arc bend bilge radius dip stick, be adjustable slide type between its described left branch leg, right supporting leg and crossbeam; Perhaps fixed between described left branch leg, right supporting leg and crossbeam.
As above a kind of without center of circle arc bend bilge radius dip stick, on its described crossbeam and shrinkage-rule, with scale mark, shrinkage-rule is positioned at the 0 scale value place at crossbeam center; Demonstrate distance between left branch leg and right supporting leg by the scale on crossbeam; Demonstrate the camber of arc section by the scale of shrinkage-rule.
As above without center of circle arc bend bilge radius dip stick, its described shrinkage-rule adopts digital display mode display measurement value.
As above without center of circle arc bend bilge radius dip stick, its described crossbeam adopts digital display mode display measurement value.
Effect of the present utility model is: the utility model proposes without center of circle arc bend bilge radius dip stick, solved the bend pipe bending radius and measured difficulty, in measurement, human factor is many, the problem that deviation is large.The utlity model has the instrument manufacturing simple, measure the characteristics such as simple, easy grasp; Need not to find out the workpiece home position; But hand dipping; Be convenient to observe and supervision; Can measure under the workpiece free position.The circular arc member bending radius measurement that the utility model is measured for the bend pipe bending radius and other is difficult to find home position or is difficult to mark home position provides a kind of simple tool.
Description of drawings
Fig. 1 is described in the utility model a kind of without center of circle arc bend bilge radius dip stick structural representation;
Fig. 2 is bend pipe inner arc bending radius instrumentation plan;
Fig. 3 is the partial enlarged drawing of Fig. 2;
Fig. 4 is bend pipe inner arc bending radius instrumentation plan;
Fig. 5 is the partial enlarged drawing of Fig. 4;
Fig. 6 is simple and easy without center of circle arc bend bilge radius dip stick schematic diagram.
Fig. 7 is AP1000 trunk line outer arc decile and bending radius instrumentation plan.
In figure: 1-left branch leg; 2-crossbeam; 3-right supporting leg; 4-shrinkage-rule.
Embodiment
Below in conjunction with drawings and Examples, the utility model is described in detail.
As shown in Figure 1, described in the utility model 1 one kinds without center of circle arc bend bilge radius dip stick, it comprises crossbeam 2, left branch leg 1, right supporting leg 3 and shrinkage-rule 4.Crossbeam 2 is horizontally disposed with, and is symmetrically connected with respectively left branch leg 1 and right supporting leg 3 at the two ends of crossbeam 2, is connected with shrinkage-rule 4 in crossbeam 2 centers.
Can be adjustable slide type between left branch leg 1, right supporting leg 3 and crossbeam 2, can be also to maintain static formula.
On crossbeam 2 and shrinkage-rule 4, with scale mark, shrinkage-rule 4 is positioned at the 0 scale value place at crossbeam 2 centers; Demonstrate distance between left branch leg 1 and right supporting leg 3 by the scale on crossbeam 2; Demonstrate camber or the convexity H of arc section by the scale of shrinkage-rule 4.
Also can be without the length scale on crossbeam 2, but utilize distance between the supporting leg of outside gage measuring left and right.
Adopt above-mentioned bend pipe bending radius measuring method without center of circle arc bend bilge radius dip stick, see Fig. 2 and Fig. 3 when bend pipe inner arc bending radius is measured, see Fig. 4 and Fig. 5 when bend pipe outer arc bending radius is measured;
Specifically comprise the steps:
(1) on the center line of bend pipe intrados or extrados, in from an end inflection point to other end inflection point arc length, centering cambered surface arc length (for example: 2,10 or 20 deciles is carried out 2 to 20 deciles, concrete decile quantity can be decided according to the degree of accuracy needs), form a plurality of Along ents; When without obvious inflection point, in employing, the cambered surface arc length replaces from an end inflection point to other end inflection point arc length the cambered surface arc length;
(2) adopt without center of circle arc bend bilge radius dip stick, Along ent on cambered surface is from left to right aimed at respectively on the top of left branch leg 1 successively, until the top of right supporting leg 3 exceeds the Along ent of the rightmost side, from left to right measure the camber H of each partial circle segmental arc;
Then, employing is without center of circle arc bend bilge radius dip stick, Along ent on cambered surface is aimed at respectively on the top of right supporting leg 3 successively from right to left, until the top of left branch leg 1 exceeds the Along ent of the leftmost side, measured from right to left the camber H of each partial circle segmental arc;
(3) left branch leg 1 or right supporting leg 3 is to the camber H of the distance W at crossbeam 2 centers and each partial circle segmental arc substitution formula respectively
Calculate the radius R of each partial circle segmental arc;
The radius R value addition of each partial circle segmental arc that (4) step (3) is calculated divided by measuring total degree (N), obtains the bending radius mean value of bend pipe external arc or interior circular arc
That is:
(5) mean value of the bending radius of the bending radius of employing bend pipe outer arc and bend pipe inner arc is as the bending radius of bend pipe; Perhaps adopt the bending radius of bend pipe outer arc to deduct the bend pipe diameter of half as the bending radius of bend pipe; Perhaps adopt the bending radius of bend pipe inner arc to add that the bend pipe diameter of half is as the bending radius of bend pipe.
The below is take certain project main pipe hot leg as example, and the utility model is described in further detail by reference to the accompanying drawings.
(1) with steel plate make one simple and easy without center of circle arc bend bilge radius dip stick, as described in Figure 6, W=300mm wherein, E=120mm.
(2) according to this main pipe hot leg design drawing, calculating hot segment of bent pipe of main pipeline part outer arc design theory length is 1876mm.
(3) according to the design theory arc length, to finding out corresponding arc length scope on the hot segment of bent pipe of main pipeline outer arc, and carry out 10 deciles, obtain 11 Along ents, as shown in Figure 7.
(4) with step (1) simple and easy without center of circle arc bend bilge radius dip stick and vernier caliper measurement crossbeam length center to the distance L value between main pipe hot leg A surface.According to formula H=L-E, calculate measurement point camber H.Again according to formula
Calculate local circular arc radius R.
When (5) from left to right aiming at Along ent 1～7 by simple and easy end without center of circle arc bend bilge radius dip stick left branch leg, the measurement result of vernier caliper sees Table 1.When measuring at the 8th, simple and easy end without the right supporting leg of center of circle arc bend bilge radius dip stick has exceeded Along ent 11, therefore no longer measure.
Table 1
When (6) aiming at from right to left Along ent 11～5 by simple and easy end wedge angle without the right supporting leg of center of circle arc bend bilge radius dip stick, the measurement result of vernier caliper sees Table 2.When measuring at the 4th, simple and easy end without center of circle arc bend bilge radius dip stick left branch leg has exceeded Along ent 1, therefore no longer measure.
Table 2
| Starting point | 11 | 10 | 9 | 8 | 7 | 6 | 5 |
| Measured value L | 97.38 | 97.60 | 97.02 | 95.88 | 96.27 | 96.36 | 96.80 |
| Camber calculated value H | 22.62 | 22.40 | 22.98 | 24.12 | 23.73 | 23.64 | 23.20 |
| Local arc radius | 2000.7 | 2020.1 | 1969.7 | 1877.7 | 1908.2 | 1915.4 | 1951.3 |
| Calculated value R | ? | ? | ? | ? | ? | ? | ? |
(7) according to formula
The outer arc radius mean value that calculates main pipe hot leg is 1939.9mm.
(8) according to the measurement diameter 958.6mm of hot segment of bent pipe of main pipeline, radius is 479.3mm.Calculate the radius of curvature R=1460.6mm of AP1000 main pipe hot leg.
The utility model be applicable to the bend pipe clod wash in making the bending radius check and check and accept in bending radius measure, the incorporeity center of circle that also can be used for the equipment such as plant equipment, container or other bend pipes maybe can't be marked the arc surface bending radius in the center of circle and be measured.The utility model survey instrument is simple, easily grasp, and measuring method is simple, need not to find out the workpiece home position, but hand dipping is convenient to measure observation and supervision, can measure under the workpiece free position.
Claims (5)
1. one kind without center of circle arc bend bilge radius dip stick, it is characterized in that: it comprises a horizontally disposed crossbeam (2), be symmetrically connected with respectively left branch leg (1) and right supporting leg (3) at the two ends of crossbeam (2), be connected with shrinkage-rule (4) in crossbeam (2) center; Described left branch leg (1), right supporting leg (3) and shrinkage-rule (4) are all vertical with crossbeam (2); Left branch leg (1) and right supporting leg (3) are isometric, and left branch leg (1) and right supporting leg (3) are equal to the distance (W) at crossbeam (2) center; Shrinkage-rule (4) moves up and down along vertical crossbeam (2) direction.
2. according to claim 1 a kind of without center of circle arc bend bilge radius dip stick, it is characterized in that: be adjustable slide type between described left branch leg (1), right supporting leg (3) and crossbeam (2); Perhaps fixed between described left branch leg (1), right supporting leg (3) and crossbeam (2).
3. according to claim 1 a kind of without center of circle arc bend bilge radius dip stick, it is characterized in that: described crossbeam (2) and shrinkage-rule (4) are upper with scale mark, and shrinkage-rule (4) is positioned at the 0 scale value place at crossbeam (2) center; Demonstrate distance between left branch leg (1) and right supporting leg (3) by the scale on crossbeam (2); Demonstrate camber or the convexity (H) of arc section by the scale of shrinkage-rule (4).
4. according to claim 1 without center of circle arc bend bilge radius dip stick, it is characterized in that: described shrinkage-rule (4) adopts digital display mode display measurement value.
5. according to claim 1 without center of circle arc bend bilge radius dip stick, it is characterized in that: described crossbeam (2) adopts digital display mode display measurement value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320216486 CN203274650U (en) | 2013-04-25 | 2013-04-25 | Measuring scale for bending radius of arc without circle center |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320216486 CN203274650U (en) | 2013-04-25 | 2013-04-25 | Measuring scale for bending radius of arc without circle center |
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| CN203274650U true CN203274650U (en) | 2013-11-06 |
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| CN 201320216486 Expired - Lifetime CN203274650U (en) | 2013-04-25 | 2013-04-25 | Measuring scale for bending radius of arc without circle center |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103234432A (en) * | 2013-04-25 | 2013-08-07 | 上海核工程研究设计院 | Center-free arc bending radius measuring ruler and bend pipe bending radius measuring method |
| CN103954206A (en) * | 2014-05-09 | 2014-07-30 | 国家电网公司 | Power cable bending radius measuring scale |
| CN104596396A (en) * | 2014-12-30 | 2015-05-06 | 青特集团有限公司 | Device for measuring inside diameter of semi-arc |
| CN105363833A (en) * | 2015-12-02 | 2016-03-02 | 中国石油集团渤海石油装备制造有限公司 | Online detecting method for pre-bending process of straight seam steel pipe |
| CN105651236A (en) * | 2016-04-01 | 2016-06-08 | 江苏华管机械制造科技有限公司 | Pipe bending radius measuring mechanism |
| CN107289851A (en) * | 2016-03-31 | 2017-10-24 | 中国二十冶集团有限公司 | Extendible deformation measurement chi and its application method |
-
2013
- 2013-04-25 CN CN 201320216486 patent/CN203274650U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103234432A (en) * | 2013-04-25 | 2013-08-07 | 上海核工程研究设计院 | Center-free arc bending radius measuring ruler and bend pipe bending radius measuring method |
| CN103954206A (en) * | 2014-05-09 | 2014-07-30 | 国家电网公司 | Power cable bending radius measuring scale |
| CN104596396A (en) * | 2014-12-30 | 2015-05-06 | 青特集团有限公司 | Device for measuring inside diameter of semi-arc |
| CN105363833A (en) * | 2015-12-02 | 2016-03-02 | 中国石油集团渤海石油装备制造有限公司 | Online detecting method for pre-bending process of straight seam steel pipe |
| CN107289851A (en) * | 2016-03-31 | 2017-10-24 | 中国二十冶集团有限公司 | Extendible deformation measurement chi and its application method |
| CN105651236A (en) * | 2016-04-01 | 2016-06-08 | 江苏华管机械制造科技有限公司 | Pipe bending radius measuring mechanism |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20131106 |