CN103499497B - A kind of pole line measurer for curve rigid - Google Patents
A kind of pole line measurer for curve rigid Download PDFInfo
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- CN103499497B CN103499497B CN201310471052.2A CN201310471052A CN103499497B CN 103499497 B CN103499497 B CN 103499497B CN 201310471052 A CN201310471052 A CN 201310471052A CN 103499497 B CN103499497 B CN 103499497B
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- pole line
- force
- pole
- test board
- measuring machine
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Abstract
A kind of pole line measurer for curve rigid, it comprises the two counter-force supports at pole line test board and fixed mount ceases to be busy two ends, two counter-force supports lay respectively at pole line test board both sides, pole line test board is provided with force measuring machine, force measuring machine is connected with the mid point of pole line and imposes transverse force to pole line, the loading disc arranged by force measuring machine, do first tension pick-up and shift scale measure the shift value of pole line mid point
, transverse load
, the tension force of pole line is measured by with tested pole line the second tension pick-up connected horizontally
, by pole line length
with the data through described device to test
,
,
substitute into formulae discovery and go out pole line bending stiffness
.Apparatus of the present invention eliminate the impact because of overhead line twisting on displacement measurement, in test can the axial tensile force of accurately adjustment rack ceases to be busy to setting value, conventional efficient, testing precision are all higher in actual applications, successfully solve the difficult problem that pole line bending stiffness is not easily accurately determined.
Description
Technical field
The present invention relates to a kind of measurement mechanism, particularly pole line measurer for curve rigid.
Background technology
In overhead transmission line design, hypothesis pole line is the flexible cable not having bending stiffness usually.For large span overhead transmission line, consider that the bending stiffness of pole line affects little on the stress of pole line and sag, but for the such as overhead transmission line such as transformer station, generating plant line, its span is less, if still calculate according to without bending stiffness hypothesis, the stress of the pole line obtained and sag and actual variance very large.In addition, when the stress in calculating support ceases to be busy wire clamp exit, do not consider the impact of bending stiffness, cannot obtain correct result yet.Therefore the bending stiffness of Measurement accuracy pole line, for the stress sag computing of little span pole line and the accurate analysis of pole line local stress significant.
At present, according to relevant hypothesis, the bending stiffness of pole line can adopt global approach and share split method two kinds of modes to solve, but said method only can determine the scope of bending stiffness, can not obtain its exact value, there is limitation.For solving in Practical Project the problems referred to above existed, need badly a kind of can the device of Measurement accuracy pole line bending stiffness.
Summary of the invention
The present invention is intended to propose a kind of pole line measurer for curve rigid, adopts this device can solve the problem cannot accurately determined for pole line bending stiffness at present.
Problem of the present invention realizes with following technical proposals:
A kind of pole line measurer for curve rigid, special feature is, it comprises the two counter-force supports at pole line test board and fixed mount ceases to be busy two ends, two counter-force supports lay respectively at pole line test board both sides, pole line test board is provided with force measuring machine, force measuring machine is connected with the mid point of pole line and imposes transverse force to pole line, and the loading disc arranged by force measuring machine, the first tension pick-up and shift scale measure the shift value of pole line mid point
, transverse load
; The tension force of pole line is measured by with tested pole line the second tension pick-up connected horizontally
, by pole line length
with the data through described device to test
,
,
substitute into formula
in, calculate
value, then by formula
calculate pole line bending stiffness
.
Above-mentioned pole line measurer for curve rigid, described pole line test board is provided with pole line hold-down support and pole line adjustable seats, and described force measuring machine is between above-mentioned two bearings, and pole line is through pole line hold-down support and pole line adjustable seats; Described force measuring machine comprises slide block, pulley blocks, loading wire rope, loading disc and the first tension pick-up, described pulley blocks is positioned on slide block, load wire rope one end through built on stilts cableties hoop and pole line lateral connection, load the wire rope other end and connect loading disc through the first tension pick-up.
On pole line measurer for curve rigid, described pole line test board long fixes two dovetail grooves to parallel along it, and described pole line adjustable seats to be assemblied on the dovetail groove that is positioned in the middle part of pole line test board and to be slidably matched with this dovetail groove; Described slide block be assemblied in be positioned at pole line test board edge dovetail groove on and be slidably matched with this dovetail groove.
Above-mentioned pole line measurer for curve rigid, described pole line hold-down support is fixed on pole line test board, is interference fit between pole line hold-down support and pole line, and described pole line adjustable seats and pole line are clearance fit.
Above-mentioned pole line measurer for curve rigid, the shift scale of described force measuring machine is fixed on slide block, and length of the scale direction is vertical with pole line length direction.
Above-mentioned pole line measurer for curve rigid, described each counter-force support is respectively equipped with pole line governor motion, and pole line two ends are provided with net, and one end of pole line, through net, wire rope, pole line governor motion, is fixed by the counter-force support of side; The pole line other end, successively through net, rotary connector, double-hook wire grip, the second tension pick-up, wire rope, pole line governor motion, is fixed by the counter-force support of opposite side.
Above-mentioned pole line measurer for curve rigid, described pole line governor motion comprises adjusting bolt holder, adjusting bolt, rope traction part, wherein, adjusting bolt holder and counter-force support are fixed, adjusting bolt is spirally connected through rope traction part and adjusting bolt holder, rope traction part connecting steel wire ropes.
The present invention is directed to and solve pole line bending stiffness Measurement accuracy problem and devise a kind of special measurement device.Described device comprises pole line test board and is positioned at the counter-force support of pole line test board both sides, and pole line test board is provided with the force measuring machine of position-adjustable, and tested pole line two ends are fixed through counter-force support, force measuring machine and pole line lateral connection.During test, slowly uniformly axial tensile force is applied to pole line, the tension force suffered by pole line is made to maintain setting value, transverse force is applied afterwards by placing counterweight in loading disc, after system stability, by the shift value of the transverse force suffered by the first tension pick-up of force measuring machine and scale record pole line and span central authorities, and measure the tension force suffered by pole line by the second tension pick-up, above-mentioned test value is substituted into formula, the bending fixing of pole line can be calculated.Adopt apparatus of the present invention measurement bays ceases to be busy bending stiffness, eliminate the impact on displacement measurement because of overhead line twisting, in test can the axial tensile force of accurately adjustment rack ceases to be busy to setting value, ensure that test result is accurate.Simple structure of the present invention, conventional efficient, testing precision are all higher in actual applications, successfully solve the difficult problem that pole line bending stiffness is not easily accurately determined.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the invention will be further described.
Fig. 1 is structural representation of the present invention;
Fig. 2 is the vertical view of Fig. 1;
Fig. 3 is the zoomed-in view at Fig. 1 D place;
Fig. 4 is the zoomed-in view at Fig. 2 E place;
Fig. 5 is the C-C sectional view of Fig. 2;
Fig. 6 is the A-A sectional view of Fig. 2;
The B-B sectional view of Fig. 7 Fig. 2.
In figure, each list of reference numerals is: 1, counter-force support, 2, pole line governor motion, 2-1, adjusting bolt holder, 2-2, adjusting bolt, 2-3, rope traction part, 3, wire rope, 4, net, 5, pole line, 6, pole line hold-down support, 7, dovetail groove, 8, load wire rope, 9, first tension pick-up, 10, loading disc, 11, pole line adjustable seats, 12, pole line test board, 13, rotary connector, 14, double-hook wire grip, 15, second tension pick-up, 16, slide block, 17, pulley blocks, 18, built on stilts cableties hoop, 19, scale.
Embodiment
Referring to Fig. 1, Fig. 2, the present invention includes pole line test board 12 and be symmetricly set on the both sides of pole line test board for two counter-force supports 1, two counter-force support of fixed mount ceases to be busy 5.Pole line test board is provided with the adjustable pole line adjustable seats 11 of the pole line hold-down support 6 fixed position and position, between pole line hold-down support and pole line adjustable seats 11, is provided with force measuring machine.Tested pole line 5 is through pole line hold-down support and pole line adjustable seats, and force measuring machine is connected with in the middle part of pole line.
Referring to Fig. 1, Fig. 2, Fig. 4, Fig. 7, described force measuring machine comprises slide block 16, pulley blocks 17, loads wire rope 8, loading disc 10 and the first tension pick-up 9.Slide block can along the length of pole line test board to slip, to adjust suitable test position, pulley blocks is made up of two fixed pulleys, pulley blocks is arranged on slide block, load one end of wire rope 8 through built on stilts cableties hoop 18 and pole line 5 lateral connection, load the wire rope other end and connect loading disc 10 through the first tension pick-up 9, in loading disc, place counterweight.First tension pick-up 9 is for measuring the power being applied to pole line by loading disc and counterweight.Built on stilts cableties hoop 18 is made up of two mutual involutory semi-circular button hoop bodies and bolt.Force measuring machine is also provided with scale 19, and scale is fixed on slide block 16, and the length direction of scale is vertical with the length direction of pole line 5.Scale loads the transversal displacement amount of rear pole line for measuring force measuring machine.
Referring to Fig. 1, Fig. 2 and Fig. 5-7, pole line test board 12 fixes two dovetail grooves 7 along its length to parallel, the bottom of pole line adjustable seats 11 is mate chimeric wedge shape with dovetail groove, and pole line adjustable seats 11 to be assemblied on the dovetail groove that is positioned in the middle part of pole line test board and to be slidably matched with this dovetail groove; The bottom of slide block 16 is also mate chimeric wedge shape with dovetail groove, slide block be assemblied in be positioned at pole line test board edge dovetail groove on.When changing tested rack ceases to be busy length or tension force, needing the position of adjusting slider in dovetail groove, making slide block be positioned at the midpoint of tested rack ceases to be busy.Pole line hold-down support 6 is fixedly mounted on pole line test board 12, pole line hold-down support and pole line adjustable seats are all supported by pole line by pedestal, upper cover and bolt, difference is: after the upper cover locking of pole line hold-down support and form interference fit between pole line, between the two without relative motion; And between pole line adjustable seats and pole line, leave gap, can slide along dovetail groove in the position of pole line adjustable seats in pole line test process, this is because tested rack ceases to be busy midpoint bears lateral load, when pole line bends, pole line axially can produce the unbalance of power, although leave gap between adjustable seats and pole line, but still have friction force between pole line and adjustable seats surface of contact, so when wire moves vertically due to the unbalance of power, adjustable seats also can move along dovetail groove.
Referring to Fig. 1-3, for two counter-force supports 1 of fixed mount ceases to be busy are respectively equipped with pole line governor motion 2, pole line two ends are provided with the net 4 pole line being played to connection and protective effect.As shown in Figure 1 and Figure 2, pole line left end is fixed by the counter-force support 1 in left side through net 4, wire rope 3, pole line governor motion 2; Pole line right-hand member, successively through net, rotary connector 13, double-hook wire grip 14, wire rope, pole line governor motion 2, is fixed by the counter-force support of opposite side.Rotary connector 13, double-hook wire grip are commercially available prod, and the effect of double-hook wire grip carries out tension coarse regulation to pole line, and rotary connector prevents pole line in test process because of torsion effect test result.The effect of the second tension pick-up is the tension variation of Real-Time Monitoring pole line.Pole line governor motion 2 structure be arranged on each counter-force support is identical, each pole line governor motion structure comprises adjusting bolt holder 2-1, adjusting bolt 2-2, rope traction part 2-3, wherein, adjusting bolt holder and counter-force support are fixed, adjusting bolt is spirally connected through rope traction part and adjusting bolt holder, rope traction part connecting steel wire ropes 3, wire rope connects net 4.The effect of pole line governor motion is that to carry out tension accurate adjustment to pole line whole
When adopting the present invention to test pole line bending stiffness, first loosen pole line hold-down support, use double-hook wire grip to apply axial tensile force to pole line; Adjusting bolt slowly uniformly across adjustment rack ceases to be busy governor motion makes the tension force of pole line maintain setting value; Tighten pole line hold-down support; By place in loading disc counterweight to pole line apply initial perpendicular to built on stilts line length to load, after wire midpoint applies lateral load, traverse shaft can produce change to a certain degree to Tensity size, thus needs the adjusting bolt of adjusting bracket ceases to be busy governor motion again to make the tension force of pole line return to setting value.After system stability to be tested, record the tension force of the pole line of the second tension pick-up display
, span central authorities shift value
lateral load suffered by pole line midpoint is shown with the first tension pick-up
(
that loading disc applies, but in order to more accurate, the size by the first tension pick-up determination lateral load).Will
,
substitute into formula
, calculate
value, then by formula
calculate pole line bending stiffness
.(
the intermediate value in order to formula of reduction derivation).
Claims (5)
1. a pole line measurer for curve rigid, it is characterized in that, it comprises the two counter-force supports (1) at pole line test board (12) and fixed mount ceases to be busy (5) two ends, two counter-force supports lay respectively at pole line test board both sides, pole line test board is provided with force measuring machine, force measuring machine is connected with the mid point of pole line and imposes transverse force to pole line, and the shift value of pole line mid point measured by the loading disc (10) arranged by force measuring machine, the first tension pick-up (9) and scale (19)
, transverse load
; The tension force of pole line is measured by with tested pole line the second tension pick-up (15) connected horizontally
, by pole line length
with the data through described device to test
,
,
substitute into formula
in, calculate
value, then by formula
calculate pole line bending stiffness
;
Described each counter-force support (1) is respectively equipped with pole line governor motion (2), and pole line two ends are provided with net (4), and one end of pole line, through net (4), wire rope (3), pole line governor motion (2), is fixed by the counter-force support of side; The pole line other end through net, rotary connector (13), double-hook wire grip (14), the second tension pick-up (15), wire rope, pole line governor motion, is fixed by the counter-force support of opposite side successively;
Described pole line governor motion (2) comprises adjusting bolt holder (2-1), adjusting bolt (2-2), rope traction part (2-3), wherein, adjusting bolt holder and counter-force support are fixed, adjusting bolt is spirally connected through rope traction part and adjusting bolt holder, rope traction part connecting steel wire ropes (3).
2. pole line measurer for curve rigid according to claim 1, it is characterized in that, described pole line test board is provided with pole line hold-down support (6) and pole line adjustable seats (11), described force measuring machine is between above-mentioned two bearings, and pole line is through pole line hold-down support and pole line adjustable seats; Described force measuring machine comprises slide block (16), pulley blocks (17), loads wire rope (8), loading disc (10) and the first tension pick-up (9), described pulley blocks is positioned on slide block, load wire rope one end through built on stilts cableties hoop (18) and pole line (5) lateral connection, load the wire rope other end and connect loading disc through the first tension pick-up.
3. pole line measurer for curve rigid according to claim 2, it is characterized in that, described pole line test board (12) long fixes two dovetail grooves (7) to parallel along it, and described pole line adjustable seats to be assemblied on the dovetail groove that is positioned in the middle part of pole line test board and to be slidably matched with this dovetail groove; Described slide block be assemblied in be positioned at pole line test board edge dovetail groove on and be slidably matched with this dovetail groove.
4. pole line measurer for curve rigid according to claim 3, it is characterized in that, described pole line hold-down support (6) is fixed on pole line test board, is interference fit between pole line hold-down support and pole line, and described pole line adjustable seats (11) and pole line are clearance fit.
5. pole line measurer for curve rigid according to claim 4, is characterized in that, the scale (19) of described force measuring machine is fixed on slide block, and length of the scale direction is vertical with pole line length direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310471052.2A CN103499497B (en) | 2013-10-11 | 2013-10-11 | A kind of pole line measurer for curve rigid |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310471052.2A CN103499497B (en) | 2013-10-11 | 2013-10-11 | A kind of pole line measurer for curve rigid |
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| Publication Number | Publication Date |
|---|---|
| CN103499497A CN103499497A (en) | 2014-01-08 |
| CN103499497B true CN103499497B (en) | 2015-11-18 |
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|---|---|---|---|
| CN201310471052.2A Expired - Fee Related CN103499497B (en) | 2013-10-11 | 2013-10-11 | A kind of pole line measurer for curve rigid |
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Families Citing this family (5)
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| CN105043896B (en) * | 2015-06-18 | 2018-06-05 | 宁波东方电缆股份有限公司 | The test method of underwater cable bending stiffness |
| CN105067434B (en) * | 2015-08-07 | 2019-01-18 | 江苏通光光缆有限公司 | A kind of device that the twisted armored cable of detection single line reverses under tension |
| CN110849563B (en) * | 2019-12-09 | 2021-05-07 | 大连理工大学 | Bending rigidity experiment method and device under overhead cable stretch bending combination |
| CN112748067B (en) * | 2020-12-23 | 2024-06-04 | 济通智能装备股份有限公司 | Calibration method for force measuring device and support based on friction coefficient measurement |
| CN114264558A (en) * | 2022-03-02 | 2022-04-01 | 西安建筑科技大学 | Automatic synchronous loading system for space structure lattice |
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