CN116929452B - Experimental simulation device and method for sliding of composite cross arm wire without suspension string - Google Patents
Experimental simulation device and method for sliding of composite cross arm wire without suspension string Download PDFInfo
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- CN116929452B CN116929452B CN202310923311.4A CN202310923311A CN116929452B CN 116929452 B CN116929452 B CN 116929452B CN 202310923311 A CN202310923311 A CN 202310923311A CN 116929452 B CN116929452 B CN 116929452B
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- 238000004088 simulation Methods 0.000 title claims abstract description 46
- 239000002131 composite material Substances 0.000 title claims abstract description 34
- 239000000725 suspension Substances 0.000 title claims abstract description 27
- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000012360 testing method Methods 0.000 claims abstract description 54
- 238000000576 coating method Methods 0.000 claims description 6
- 239000004020 conductor Substances 0.000 claims description 6
- 238000002474 experimental method Methods 0.000 claims description 6
- 239000011248 coating agent Substances 0.000 claims description 5
- 150000001875 compounds Chemical class 0.000 claims description 3
- 238000004364 calculation method Methods 0.000 claims description 2
- 238000002372 labelling Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 239000002390 adhesive tape Substances 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000012212 insulator Substances 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
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Abstract
The invention discloses an experimental simulation device and method for sliding of a composite cross arm wire without a suspension string, wherein the method comprises the steps of generating different height differences and gear distance conditions by adjusting positions of a suspension pulley and a strain clamp; carrying out icing simulation on the test wire under the condition of the same height difference and span, marking a first balance position and a second balance position according to the test wire before simulation and the test wire after simulation, and generating the sliding quantity under the condition of the current height difference and span according to the first balance position and the second balance position; and respectively carrying out icing simulation, position labeling and slippage generation on the conditions of different heights and distances, and generating slippage under the conditions of different heights and distances. Through the technical scheme, the invention provides the simulation device and the simulation method for testing the change of the slippage of the wire along with the span and the height difference, and the slippage range of the wire under unbalanced tension of the composite cross arm is effectively simulated and tested.
Description
Technical Field
The invention relates to the technical field of electric power, in particular to an experimental simulation device and method for sliding of a composite cross arm wire without a suspension string.
Background
With the rapid development of the power grid, the construction of the power grid in the whole country is more and more, the demand of steel is more and more, a large amount of mineral energy is consumed, and meanwhile, serious pollution to the ecological environment is caused. In order to make up for the limitations of steel, composite cross arm towers have been developed. Through the iterative application of new materials and new technologies, the composite cross arm tower is gradually focused and valued in the construction of the power transmission line of the power grid, and the composite cross arm tower is also favored by power grid users by virtue of less resource energy consumption and carbon emission, more saved tower weight, tower height, corridor width, less operation accident occurrence rate and maintenance cost, and has good economic and social benefits in technical reliability and the design service life cycle of the power transmission line. However, because the use of the composite cross arm causes unbalanced tension to the wires, in order to release the unbalanced tension, the existing composite cross arm tangent tower needs to hang a hanging hardware fitting with a proper length, and meanwhile, for most of the composite cross arms in light ice areas and below, the influence of the broken line unbalanced tension value on the specification and the manufacturing cost of the cross arm is large, so that the existing composite cross arm tangent tower has no obvious economic advantage compared with the traditional hanging tangent tower scheme. For this reason, it is necessary to test how to reduce the unbalanced tension problem of the wire under the composite cross arm, and to test the amount of slippage of the wire under the unbalanced tension.
Disclosure of Invention
In order to solve the problem that the existing technology has insufficient unbalanced tension of the wire and can not effectively carry out the simulation experiment of sliding, the invention provides an experimental simulation device and method for the sliding of a composite cross arm wire without a suspension string, and provides a device capable of testing the sliding quantity of the wire along with the change of the span and the height difference, so as to obtain the sliding quantity range of the wire under the unbalanced tension of the composite cross arm.
In order to achieve the above purpose, the invention is realized by the following technical scheme:
an experimental simulation device for a composite cross arm conductor slip without a catenary, comprising:
the testing device comprises a testing wire, a strain clamp, a first mass block, a second mass block, a U-shaped ring, a force sensor, a force measuring instrument and a hanging pulley;
the suspension pulley is fixed on the first mass block, and the test wire is suspended on the suspension pulley;
the two ends of the test wire are respectively fixed on strain clamps at different positions of the same horizontal plane, a force sensor is arranged on the strain clamps, the force sensor is fixed on the second mass block through stranded wires, and the force measuring instrument is connected with the force sensor.
In order to better achieve the technical purpose, the invention also provides a simulation method of the experimental simulation device for the sliding of the composite cross arm wire without the suspension string, which comprises the following steps:
generating different height differences and gear distance conditions by adjusting the positions of the hanging pulley and the strain clamp;
carrying out icing simulation on the test wire under the condition of the same height difference and span, marking a first balance position and a second balance position according to the test wire before simulation and the test wire after simulation, and generating the sliding quantity under the condition of the current height difference and span according to the first balance position and the second balance position;
and respectively carrying out icing simulation, position labeling and slippage generation on the conditions of different heights and distances, and generating slippage under the conditions of different heights and distances.
Optionally, the process of generating the slip amount under the current altitude difference and gear distance conditions includes:
placing the wire hanging points of the strain clamp at equal-height hanging points, and setting a height difference between the wire hanging points of the hanging pulley and the wire hanging points of the strain clamp;
the method comprises the steps of changing the gear distances at two sides of a hanging point by adjusting the positions of hanging pulleys, and marking a first balance position of a test wire under the current gear distance after the test wire is self-balanced, wherein the gear distances comprise a large gear distance and a small gear distance;
binding the simulation wire on the test wire, and marking a second balancing position of the bound test wire under the current span after the bound test wire is self-balanced;
and acquiring the current height difference and the sliding quantity under the current gear according to the first balance position and the second balance position.
Optionally, the method further comprises: and placing the wire hanging points of the hanging pulley and the wire hanging points of the strain clamp at the same equal-altitude hanging points, performing icing simulation, position marking and slippage generation, and generating slippage under different gear distances in an equal-altitude hanging point experiment.
Optionally, the analog conductor is adjusted to generate a third balance position, and the slippage under different ice coating thicknesses is generated according to the third balance position and the first balance position;
the simulated icing thickness of the simulated wire is obtained through dead weight of the simulated wire and specific load calculation of icing windless.
Optionally, the method further comprises the step of obtaining tension data of the test wire under the current gear distance through a force sensor and a force measuring instrument; and acquiring the corresponding relation of the slippage and the tension data according to the slippage and the tension data under the current gear.
Optionally, the method further comprises the step of testing the maximum sag of the test wire under the current span by a laser range finder, and obtaining the corresponding relation between the slip quantity and the maximum sag according to the slip quantity and the maximum sag under the current span.
The invention has the following technical effects:
1. the device for connecting the wires with the composite cross arm is used for connecting two towers, so that the connection of the suspension insulator strings is replaced, unbalanced tension borne by the wires can be reduced, the heights of the wires can be increased, and operation accidents are reduced.
2. The device for connecting the composite cross arm with the lead is simple in manufacture, convenient to operate, small in occupied space, and capable of effectively and rapidly connecting the cross arm with the lead, and capable of avoiding direct contact between a connecting part and the outside, and playing a certain protection role in preventing corrosion of the connecting part.
3. The device for connecting the wires of the composite cross arm pole tower has simple structure and low manufacturing cost, and can be repeatedly used within the service life; the operation is simple, the constructors can be effectively reduced, and the risk of high-altitude operation is reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions of the prior art, the drawings that are needed in the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of an intermediate hanging point according to an embodiment of the present invention;
fig. 2 is a schematic diagram of two hanging points provided in an embodiment of the present invention;
FIG. 3 is a schematic diagram of a simulation experiment of a contour suspension point according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of an unequal suspension point simulation experiment according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of an icing condition hanging point provided by an embodiment of the present invention;
FIG. 6 is a schematic diagram of a strain clamp provided by an embodiment of the present invention;
the device comprises a 1-hanging pulley, a 2-first mass block, a 3-testing wire, a 4-force sensor, a 5-second mass block, a 6-force measuring instrument and a 7-binding belt.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front," "rear," "head," "tail," and the like are used as an orientation or positional relationship based on that shown in the drawings, merely to facilitate description of the invention and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "connected," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
The invention discloses an experimental simulation device and method for sliding of a composite cross arm wire without a suspension string, relates to the technical field of electric power, and in particular relates to a self-balancing device for measuring the composite cross arm wire under unbalanced tension, and comprises a test wire 3 of various types, a strain clamp, a first mass block 2, a second mass block 5, a U-shaped ring, a force sensor 4, a force measuring instrument 6 and a suspension pulley 1. The device capable of testing the change of the slippage of the wire along with the span and the height difference can be used for obtaining the slippage range of the wire under unbalanced tension under the composite cross arm. This a device for compound cross arm reduces overhang insulator height, more the tower of saving heavy, tower height and corridor width, less operation accident occurrence and maintenance cost degree, promotes wire height, when protecting transmission tower better, promotes the economic nature of compound cross arm tower and becomes the problem that needs urgent solution.
An experimental simulation device for sliding of a composite cross arm wire without a suspension string comprises a test wire 3 of various types, a strain clamp, a first mass block 2, a second mass block 5, a U-shaped ring, a force sensor 4, a force measuring instrument 6 and a suspension pulley 1. The hanging pulley 1 is fixed on the mass block 2, the testing wire 3 is hung on the hanging pulley 1, the testing wire 3 is connected with the force sensor 4 at two ends, the force sensor 4 is fixed on the second mass block 5, and the force sensor 4 is connected with the force measuring instrument 6.
An experimental simulation method for sliding of a composite cross arm wire without a suspension string is provided, wherein a simulation wire 7 is applied to a test wire 3 to simulate even icing, so that the sliding quantity under different gear distances and height differences is measured. The hanging pulley 1 gives the wire slippage under different ice thickness by giving different gear height differences.
As shown in fig. 1 to 6, the technical scheme provided by the invention is as follows: an experimental simulation method for the sliding of a composite cross arm wire without a suspension string comprises a suspension pulley 1 and a suspension device arranged and suspended on the suspension pulleyTest wires 2 on the pulleys are respectively at the height H 1 And height H 2 The first mass block 2 and the second mass block 5 which are arranged at two ends of the two planes are used for fixing two ends of the wire to simulate three towers and two gears, the middle hanging point is hung by a pulley 1, and the movement of the pulley simulates the self-balancing state of the wire under the ice-coating working condition. The wires at the two ends are connected by a wire clamp and a U-shaped ring, and then are connected with the force sensor 4, and finally the force sensor 4 is fixed on the second mass block 5 by a steel strand, and the force sensor 4 is connected with the dynamometer 6.
First, an isocuspension experiment is performed: firstly, the sag and tension of the wires under the state of a single test wire 3 are simulated, at the moment, the wires have dead weight, and the wire hanging point of the hanging pulley 1, namely the middle hanging point, is placed at the height H 1 And hanging a single test wire at three hanging points, so that the three hanging points of the wire are arranged at equal-height hanging points, and the middle hanging point can move freely until balanced. Setting a plurality of different gear distances, changing the gear distance by moving the middle hanging point of the hanging pulley 1 left and right, marking the balance position 2-1 on the test wire 3 by using a white adhesive tape or other marking modes after the wire 3 to be tested is self-balanced, reading out data at two ends at the moment by using a dynamometer 6, measuring the maximum sag of the gear distance at the moment, namely the distance from a plane to the lowest point of the sag by using a laser range finder, recording the data, and changing the gear distance to mark the positions 2-2,2-3,2-4 and … respectively.
And secondly, simulating sag and tension of the test wire 3 in a uniform icing state, wherein the invention adopts another simulation wire to simulate uniform icing, and uses the binding belt 7 to tightly attach the other simulation wire to the initial single test wire 3, and because the binding belt 7 is equidistantly bound, two wires can be tightly attached, uniform icing can be simulated, and the icing thickness simulated by the simulation wire can be calculated through the dead weight of the second simulation wire and the specific load of icing without wind. And similarly, setting a plurality of different gear distances, changing two gear distances by moving a middle hanging point left and right, marking a balance position 2-1-1 on the test wire 3 by using a white adhesive tape or other marking modes after the wire 3 to be tested is self-balanced, reading out data at two ends at the moment by using a dynamometer 6, measuring the maximum sag of the gear distance at the moment, namely the distance from a plane to the lowest point of the sag by using a laser range finder, recording the data, and changing the gear distances to mark positions 2-2-1,2-3-1,2-4-1 … respectively.
The distances of the marking positions before and after the ice coating is applied to the test wire under the same gear distance are measured respectively, and the distances of examples 2-1 and 2-1-1 are the sliding amount of the test wire 3 under the unbalanced tension in the self-balancing state under the first ice coating state.
Secondly, carrying out an unequal-altitude suspension point experiment, and moving the middle suspension point to a height H 2 The two ends of the wire are still at the height H 1 The other experimental steps are the same as the equal-height suspension point experiment, the tension and the maximum sag of the single wire with the large and small span after the self-balancing of the test wire 3 are measured firstly, and the distance is sequentially measured, and the height H is measured by changing the simulation wire 1 And height H 2 Other various icing experiments can be performed again.
By testing different ice coatings, gear distances and height differences, the measured tension, sag and slippage data are analyzed, and the following can be obtained:
the small-span tension gradually decreases and the large-span tension gradually increases along with the increase of the slippage; with the increase of the sliding quantity, the sag of the small span is gradually increased, and the sag of the large span is gradually increased. The analysis result is applied to a device at the connecting wire of the composite cross arm, so that the unbalanced tension problem of the wire under the composite cross arm can be reduced. The device for connecting the wires of the composite cross arm pole tower has simple structure and low manufacturing cost, and can be repeatedly used within the service life.
The foregoing is merely a preferred embodiment of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions easily conceivable by those skilled in the art within the technical scope of the present application should be covered in the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (5)
1. Experimental simulation device for there is not compound cross arm wire of string that hangs, its characterized in that includes:
the testing device comprises a testing wire, a strain clamp, a first mass block, a second mass block, a U-shaped ring, a force sensor, a force measuring instrument and a hanging pulley;
the suspension pulley is fixed on the first mass block, and the test wire is suspended on the suspension pulley;
the two ends of the test wire are respectively fixed on strain clamps at different positions of the same horizontal plane, the strain clamps are provided with force sensors through U-shaped rings, the force sensors are fixed on the second mass block through stranded wires, and the force measuring instrument is connected with the force sensors;
the simulation method based on the experimental simulation device for the sliding of the composite cross arm wire without the suspension string comprises the following steps:
generating different height differences and gear distance conditions by adjusting the positions of the hanging pulley and the strain clamp;
carrying out icing simulation on the test wire under the condition of the same height difference and span, marking a first balance position and a second balance position according to the test wire before simulation and the test wire after simulation, and generating the sliding quantity under the condition of the current height difference and span according to the first balance position and the second balance position;
respectively carrying out icing simulation on different height differences and gear distances, marking positions and generating sliding amounts to generate the sliding amounts under different height differences and gear distances;
the process for generating the slip quantity under the current height difference and gear distance conditions comprises the following steps:
placing the wire hanging points of the strain clamp at equal-height hanging points, and setting a height difference between the wire hanging points of the hanging pulley and the wire hanging points of the strain clamp;
the method comprises the steps of changing the gear distances at two sides of a hanging point of a hanging pulley by adjusting the position of the hanging pulley, and marking a first balance position of a test wire under the current gear distance after the test wire is self-balanced, wherein the gear distances comprise a large gear distance and a small gear distance;
binding the simulation wire on the test wire, and marking a second balancing position of the bound test wire under the current span after the bound test wire is self-balanced;
and acquiring the current height difference and the sliding quantity under the current gear according to the first balance position and the second balance position.
2. The experimental simulation apparatus for non-catenary composite cross arm conductor slip of claim 1, wherein:
further comprises: and placing the wire hanging points of the hanging pulley and the wire hanging points of the strain clamp at the same equal-altitude hanging points, performing icing simulation, position marking and slippage generation, and generating slippage under different gear distances in an equal-altitude hanging point experiment.
3. The experimental simulation apparatus for non-catenary composite cross arm conductor slip of claim 1, wherein:
adjusting the analog lead to generate a third balance position, and generating slippage under different ice coating thicknesses according to the third balance position and the first balance position;
the simulated icing thickness of the simulated wire is obtained through dead weight of the simulated wire and specific load calculation of icing windless.
4. The experimental simulation apparatus for non-catenary composite cross arm conductor slip of claim 1, wherein:
the tension data of the test wire under the current gear distance is obtained through the force sensor and the dynamometer; and acquiring the corresponding relation of the slippage and the tension data according to the slippage and the tension data under the current gear.
5. The experimental simulation apparatus for non-catenary composite cross arm conductor slip of claim 1, wherein:
and the method further comprises the step of testing the maximum sag of the test wire under the current span by a laser range finder, and acquiring the corresponding relation between the slip quantity and the maximum sag according to the slip quantity and the maximum sag under the current span.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310923311.4A CN116929452B (en) | 2023-07-26 | 2023-07-26 | Experimental simulation device and method for sliding of composite cross arm wire without suspension string |
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| CN202310923311.4A CN116929452B (en) | 2023-07-26 | 2023-07-26 | Experimental simulation device and method for sliding of composite cross arm wire without suspension string |
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| CN116929452B true CN116929452B (en) | 2024-03-08 |
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