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CN110906870A - Method for observing and adjusting lead through gear side sag with horizontal angle of 90 degrees - Google Patents

Method for observing and adjusting lead through gear side sag with horizontal angle of 90 degrees Download PDF

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CN110906870A
CN110906870A CN201911201460.XA CN201911201460A CN110906870A CN 110906870 A CN110906870 A CN 110906870A CN 201911201460 A CN201911201460 A CN 201911201460A CN 110906870 A CN110906870 A CN 110906870A
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sag
degrees
horizontal angle
gear side
theta
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CN110906870B (en
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曹翀
杨作强
李君章
齐林
孙建兴
肖贵成
王家彪
朱兆伟
卢凯
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Henan Power Transmission and Transformation Construction Co Ltd
State Grid Corp of China SGCC
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Henan Power Transmission and Transformation Construction Co Ltd
State Grid Corp of China SGCC
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B11/00—Measuring arrangements characterised by the use of optical techniques
    • G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
    • G01B11/06—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness for measuring thickness ; e.g. of sheet material
    • G01B11/0608—Height gauges
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G1/00—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines
    • H02G1/02—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for overhead lines or cables

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electric Cable Installation (AREA)
  • Length Measuring Devices With Unspecified Measuring Means (AREA)

Abstract

The invention provides a method for observing and adjusting a lead by a gear side sag with a horizontal angle of 90 degrees, which is used for providing an observation method for adopting a special position, reducing distance measurement and improving construction efficiency
Figure DEST_PATH_IMAGE001
The angle is 90 degrees, and then the maximum sag f is calculated by solving the triangle in the established triangle, so that the distance measurement is reduced, and the construction efficiency is improved; under the condition that the wire is not erected yet, the set sag is known and the set sag is equal to the maximum sag f, and the maximum sag f is calculated
Figure 11894DEST_PATH_IMAGE002
And the line is continuously loosened in the erecting process
Figure 729314DEST_PATH_IMAGE002
And meets the requirement.

Description

Method for observing and adjusting lead through gear side sag with horizontal angle of 90 degrees
Technical Field
The invention belongs to the technical field of sag observation, and particularly relates to a method for observing and adjusting a wire through a side-blocking sag with a horizontal angle of 90 degrees.
Background
In the process of observing the overhead line sag of the power transmission line, the commonly used sag observation methods comprise a gear end observation method, an off-gear observation method, an in-gear observation method and a gear side observation method, wherein due to the fact that the extra-high voltage iron tower is high, observation cannot be carried out on the gear end, the outside of the gear and the inside of the gear, and when the gear side observation is adopted, the distance l between the hanging points is measured at least once every time the sag is measuredmOr lnThe maximum sag is calculated through the hanging point distance, the hanging point distance is measured in a prism-free mode of the total station, and the operation of measuring the horizontal hanging point distance in the prism-free mode of the total station is complex.
Disclosure of Invention
The invention aims to provide a method for observing and adjusting a lead through a gear side sag with a horizontal angle of 90 degrees, which is used for providing an observation method for adopting a special position, reducing distance measurement and improving construction efficiency.
The technical scheme for solving the technical problems of the invention is as follows: a method of adjusting a wire by inspection of a lateral sag at a 90 degree horizontal angle, comprising:
step 1, setting an observation point of a total station instrument as O, the top of a first extra-high voltage iron tower as H, the top of a second extra-high voltage iron tower as Q, the intersection points of the horizontal planes of the first extra-high voltage iron tower, the second extra-high voltage iron tower and the O point as H ', Q', H 'Q' as l and l are known, and setting ∠ OH 'Q' as thetaf，θfLet ∠ H 'OQ' be θ at 90 °aMeasuring theta by using total stationaLet tan θb＝tanθa/2；
Step 2: rotating the horizontal angle of the total station by theta b degrees by taking the alignment HH 'as an initial position, recording the intersection point of the extension line of the horizontal angle and the H' Q 'as X, and recording the vertical projection point of the X on the sag as X';
step 3, setting ∠ H 'Q' O as thetagOH' is lmOQ' is lnThrough thetaaFinding thetag、lm、ln；
And 4, step 4: let H' X be lxOX is loThrough l, thetaa、θbTo obtain
Figure BDA0002295989790000011
Step 5, setting ∠ HOH' as thetac∠ QOQ' is θdMeasuring theta by theodolitec、θd；
Step 6: let HH' be hHQQ' is hQThrough l, thetaa、θc、θdFind hH、hQ；
And 7: let f be the sag to be measured, and h be X' XpAccording to the significance of sag, obtain
Figure BDA0002295989790000021
Step 8, let ∠ XOX' be thetaeTheta is measured using theodolitee；
And step 9: by a 1o、θeCalculating hP；
Step 10: through l, thetaa、θb、θc、θd、θeF, when the line is erected, the sag is adjusted by comparing the maximum sag f with a set sag value;
step 11: when the line is not yet erected, f is known as thetaeWithout knowledge, by
Figure BDA0002295989790000022
Figure BDA0002295989790000023
Calculate thetaeAnd the line is continuously loosened during erection to make thetaeMeets the requirements.
In the step 3, theta is obtainedg、lm、lnThe formula of (1) is: thetag＝90°-θa、
Figure BDA0002295989790000024
In the step 4, l is calculatedoThe derivation process of (1) is as follows: because of the fact that
Figure BDA0002295989790000025
Therefore lo＝lmcosθbTherefore, it is
Figure BDA0002295989790000026
H is obtained in the step 6H、hQThe process comprises the following steps:
Figure BDA0002295989790000027
h is obtained in the step 9pThe formula used is: h isp＝lotanθe。
The derivation process of calculating f in step 10 is as follows: because of the fact that
Figure BDA0002295989790000028
Therefore, it is not only easy to use
Figure BDA0002295989790000029
Figure BDA00022959897900000210
Therefore, it is not only easy to use
Figure BDA00022959897900000211
Therefore, it is not only easy to use
Figure BDA00022959897900000212
The invention has the beneficial effects that: by adopting a special position based on the existing gear side observation to make the horizontal angle thetafThe angle is 90 degrees, and then the maximum sag f is calculated by solving the triangle in the established triangle, so that the more complicated measurement of the distance of a hanging point is reduced, and the construction efficiency is improved; in the case of a wire that has not been erected, the set sag is known and satisfies that the set sag is equal to the maximum sag f, by calculating θeAnd the line is loosened during erectioneAnd meets the requirement.
Drawings
Fig. 1 is a schematic diagram of the present invention.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1, the present invention includes:
step 1, setting an observation point of a total station instrument as O, the top of a first extra-high voltage iron tower as H, the top of a second extra-high voltage iron tower as Q, the intersection points of the horizontal planes of the first extra-high voltage iron tower, the second extra-high voltage iron tower and the O point as H ', Q', H 'Q' as l and l are known, and setting ∠ OH 'Q' as thetaf，θfLet ∠ H 'OQ' be θ at 90 °aMeasuring theta by using total stationaLet tan θb＝tanθa/2；
Step 2: levelling a total station to alignHH' initial position rotation thetabThe intersection point of the horizontal angle extension line and the H ' Q ' is marked as X, and the vertical projection point of the X on the sag is marked as X ';
step 3, setting ∠ H 'Q' O as thetagOH' is lmOQ' is lnThrough thetaaFinding thetag、lm、ln；
And 4, step 4: let H' X be lxOX is loThrough l, thetaa、θbTo obtain
Figure BDA0002295989790000031
Step 5, setting ∠ HOH' as thetac∠ QOQ' is θdMeasuring theta by theodolitec、θd；
Step 6: let HH' be hHQQ' is hQThrough l, thetaa、θc、θdFind hH、hQ；
And 7: let f be the sag to be measured, and h be X' XpAccording to the significance of sag, obtain
Figure BDA0002295989790000032
Step 8, let ∠ XOX' be thetaeTheta is measured using theodolitee；
And step 9: by a 1o、θeCalculating hP；
Step 10: through l, thetaa、θb、θc、θd、θeF, when the line is erected, the sag is adjusted by comparing the maximum sag f with a set sag value;
step 11: when the line is not yet erected, f is known as thetaeWithout knowledge, by
Figure BDA0002295989790000033
Figure BDA0002295989790000034
Calculate thetaeAnd the line is continuously loosened during erection to make thetaeMeets the requirements.
In the step 3, theta is obtainedg、lm、lnThe formula of (1) is: thetag＝90°-θa、
Figure BDA0002295989790000035
In the step 4, l is calculatedoThe derivation process of (1) is as follows: because of the fact that
Figure BDA0002295989790000036
Therefore lo＝lmcosθbTherefore, it is
Figure BDA0002295989790000037
H is obtained in the step 6H、hQThe process comprises the following steps:
Figure BDA0002295989790000041
h is obtained in the step 9pThe formula used is: h isp＝lotanθe。
The derivation process of calculating f in step 10 is as follows: because of the fact that
Figure BDA0002295989790000042
Therefore, it is not only easy to use
Figure BDA0002295989790000043
Figure BDA0002295989790000044
Therefore, it is not only easy to use
Figure BDA0002295989790000045
Therefore, it is not only easy to use
Figure BDA0002295989790000046
In the field of sag observation, adjacent towers are generally not as high in height in consideration of the problem of ground height in the actual erection process, wherein the common maximum sag of a wire between adjacent towers with a height difference of no more than 10% is considered to occur in the center of a span, which is a default technical viewpoint known to those skilled in the art, and in the invention, the calculation is performed on the adjacent towers with a height difference of no more than 10%, and the default maximum sag occurs at the midpoint of the span l.
By adopting a special position based on the existing gear side observation to make the horizontal angle thetafThe angle is 90 degrees, and then the maximum sag f is calculated by solving the triangle in the established triangle, so that the more complicated measurement of the distance of a hanging point is reduced, and the construction efficiency is improved; in the case of a wire that has not been erected, the set sag is known and satisfies that the set sag is equal to the maximum sag f, by calculating θeAnd the line is loosened during erectioneAnd meets the requirement.

Claims (6)

1.一种通过水平角为90度的档侧弧垂观测调整导线的方法，其特征在于，包括：1. a method for observing and adjusting the lead wire through the sag observation of the gear side of 90 degrees by the horizontal angle, is characterized in that, comprises: 步骤1：设经纬仪观测点为O，第一特高压铁塔的顶部为H，第二特高压铁塔的顶部为Q，第一特高压铁塔、第二特高压铁塔与O点所在的水平面的交点为H′、Q′，H′Q′为1且1已知，设∠OH′Q′为θf，θf＝90°，设∠H′OQ′为θa、用经纬仪测出θa，设tanθb＝tanθa/2，设最大弧垂为f；Step 1: Let the theodolite observation point be O, the top of the first UHV tower is H, the top of the second UHV tower is Q, and the intersection of the first UHV tower, the second UHV tower and the horizontal plane where point O is located is H′, Q′, H′Q′ is 1 and 1 is known, let ∠OH′Q′ be θ f , θ f =90°, let ∠H′OQ′ be θ a , measure θ a with theodolite, Let tanθ b = tanθ a /2, and let the maximum sag be f; 步骤2：将经纬仪水平角以对准HH′为初始位置转动θb度，水平角延长线与H′Q′的交点处记作X，X在弧垂上的垂直投影点记作X′；Step 2: Rotate the horizontal angle of the theodolite by θ b degrees with the alignment HH' as the initial position, the intersection of the horizontal angle extension line and H'Q' is marked as X, and the vertical projection point of X on the sag is marked as X'; 步骤3：设∠H′Q′O为θg，OH′为lm，OQ′为ln，通过θa求θg、lm、ln；Step 3: Let ∠H'Q'O be θ g , OH' be lm , OQ ' be ln , and find θ g , lm , ln by θ a ; 步骤4：设H′X为lx，OX为lo，通过l、θa、θb求得
Figure FDA0002295989780000011
Step 4: Let H'X be l x , OX be l o , obtain by l, θ a , θ b
Figure FDA0002295989780000011
 步骤5：设∠HOH′为θc、∠QOQ′为θd，用经纬仪测出θc、θd；Step 5: Set ∠HOH' as θ c and ∠QOQ' as θ d , and measure θ c and θ d with theodolite; 步骤6：设HH′为hH，QQ′为hQ、通过l、θa、θc、θd求出hH、hQ；Step 6: Set HH' as h H , QQ' as h Q , obtain h H , h Q through l, θ a , θ c , θ d ; 步骤7：设需要测量的弧垂为f，X′X为hp，根据弧垂的意义，得出
Figure FDA0002295989780000012
Step 7: Set the sag to be measured as f and X′X as h p , according to the meaning of sag, get
Figure FDA0002295989780000012
 步骤8：设∠XOX′为θe，使用经纬仪测出θe；Step 8: Set ∠XOX′ as θ e , use theodolite to measure θ e ; 步骤9：通过lo、θe求hP；Step 9: Find h P through l o and θ e ; 步骤10：通过l、θa、θb、θc、θd、θe求f，当线已经架设时，通过将最大弧垂f与设定的弧垂值比较对弧垂进行调整；Step 10: Find f by l, θ a , θ b , θ c , θ d , θ e , when the line has been erected, adjust the sag by comparing the maximum sag f with the set sag value; 步骤11：当线还未架设时，f已知θe未知的情况下，通过
Figure FDA0002295989780000013
Figure FDA0002295989780000014
计算出θe，架设的过程中不断松动线使θe满足要求。Step 11: When the line has not been erected, f is known and θ e is unknown, pass
Figure FDA0002295989780000013
Figure FDA0002295989780000014
Calculate θ e , and loosen the wire continuously during the erection process to make θ e meet the requirements. 2.根据权利要求1所述的一种通过水平角为90度的档侧弧垂观测调整导线的方法，其特征在于，所述步骤3中求θg、lm、ln的公式为：θg＝90°-θa、
Figure FDA0002295989780000015
Figure FDA0002295989780000016
2. a kind of method according to claim 1, wherein the horizontal angle is 90 degrees of gear side sag observation to adjust the wire method, it is characterized in that, in described step 3, the formula of seeking θ g , lm , ln is: θ g =90°-θ a ,
Figure FDA0002295989780000015
Figure FDA0002295989780000016
 3.根据权利要求2所述的一种通过水平角为90度的档侧弧垂观测调整导线的方法，其特征在于，所述步骤4中求lo的推导过程为：因为
Figure FDA0002295989780000021
所以lo＝lmcosθb，所以
Figure FDA0002295989780000022
3. a kind of method according to claim 2 that is 90 degrees of sag observation adjustment wire by horizontal angle, it is characterized in that, in the described step 4, the derivation process of seeking l o is: because
Figure FDA0002295989780000021
So l o =lm cosθ b , so
Figure FDA0002295989780000022
 4.根据权利要求3所述的一种通过水平角为90度的档侧弧垂观测调整导线的方法，其特征在于，所述步骤6中求hH、hQ的过程为：
Figure FDA0002295989780000023
Figure FDA0002295989780000024
4. a kind of method according to claim 3 that is 90 degrees of gear side sag observation adjustment wire by horizontal angle, it is characterized in that, in described step 6, the process of seeking h H , h Q is:
Figure FDA0002295989780000023
Figure FDA0002295989780000024
 5.根据权利要求4所述的一种通过水平角为90度的档侧弧垂观测调整导线的方法，其特征在于，所述步骤9中求hp所用的公式为：hp＝lotanθe。5. a kind of method according to claim 4 is that the horizontal angle is 90 degrees of gear side sag observation adjustment wire, it is characterized in that, in the described step 9, the formula used for seeking h p is: h p =1 o tanθ e . 6.根据权利要求5所述的一种通过水平角为90度的档侧弧垂观测调整导线的方法，其特征在于，所述步骤10中求f的推导过程为：因为
Figure FDA0002295989780000025
所以
Figure FDA0002295989780000026
所以
Figure FDA0002295989780000027
所以
Figure FDA0002295989780000028
6. The method for adjusting the wire by observing the sag of the gear side with a horizontal angle of 90 degrees according to claim 5, wherein the derivation process for seeking f in the step 10 is: because
Figure FDA0002295989780000025
so
Figure FDA0002295989780000026
so
Figure FDA0002295989780000027
so
Figure FDA0002295989780000028
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