Clearance calculation system

Abstract

The objective is to provide a clearance analysis system that allows for easy verification of whether the required clearance is secured in the design of a transmission tower. [Solution] The clearance analysis system of the present invention is characterized by comprising: a first position identification unit that identifies a first position which serves as a reference when measuring the first clearance for insulation between the tower and the power lines arranged on the tower in the drawing data of the tower and the power lines arranged on the tower; a first clearance measurement unit that measures the first clearance from the power lines to the first position in the drawing data; and an output unit that displays the difference between the first clearance and a preset insulation interval on the drawing data.

Description

Technical Field

[0006] , , , ,

[0001] The present invention relates to a clearance examination system for examining whether a predetermined clearance is ensured in the design of a tower.

Background Art

[0002] Conventionally, when designing a new tower, a tower design drawing has been created using CAD or the like (see Patent Document 1). In this tower design, in order to ensure the insulation distance between the wires supported by the tower and the tower, etc., in the tower design drawing drawn by a designer or the like, the distance (clearance) between the tower and the wires supported by the tower is measured, and it has been confirmed whether the insulation distance, etc. is ensured.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, the clearance (distance) between the tower and the wires, etc. is not displayed on the drawing data created by the above-mentioned CAD or the like. It is necessary to measure the distance between each wire, etc. and a predetermined part of the tower on the drawing data and then confirm whether a predetermined clearance is ensured at each position. This measurement and confirmation work is complicated.

[0005] Therefore, an object of the present invention is to provide a clearance examination system that can easily confirm whether a predetermined clearance is ensured in the design of a tower.

Means for Solving the Problems

[0006] The clearance examination system of the present invention is In the drawing data of a transmission tower and the power lines arranged on the transmission tower, a first position identification unit identifies a first position that serves as a reference when measuring the first clearance for insulation between the transmission tower and the power lines, In the aforementioned drawing data, a first clearance measuring unit measures the first clearance from the electric wire to the first position, The system includes an output unit that displays the difference between the first clearance and a preset insulation interval on the drawing data.

[0007] With this configuration, the difference between the first clearance and the insulation gap is displayed on the drawing data, making it easy to confirm whether an insulation gap (a predetermined clearance) is secured between the power line and the tower during the design of the tower.

[0008] The clearance analysis system described above is In the aforementioned drawing data, a second position identification unit identifies a second position on the outer edge of the work area, which is set as an area where workers who climbed the tower may be present, The drawing data includes a second clearance measuring unit that measures a second clearance related to the safety distance of the worker, The aforementioned drawing data includes the charging section of the insulator device to be placed on the transmission tower. The aforementioned second position is a reference position when measuring the aforementioned second clearance. The second clearance is the distance from the charging part to the second position. The output unit may display the second clearance on the drawing data.

[0009] With this configuration, the second clearance (the distance from the live part to the second position) is displayed on the drawing data, making it easy to confirm whether a safe distance (a predetermined clearance) is secured between the live part and the outer edge of the work area in the design of the transmission tower.

[0010] Furthermore, the clearance analysis system is The drawing data includes a third clearance measuring unit that measures the third clearance, which is the shortest distance from the electric wire to the outer edge of the work area. The output unit may display the third clearance on the drawing data.

[0011] With this configuration, the shortest distance from the power line to the outer edge of the work area (third clearance) is displayed on the drawing data, making it easy to confirm whether or not a safe distance (predetermined clearance) is secured in the design of the transmission tower.

[0012] Furthermore, the clearance analysis system is The system may also include a drawing unit that generates the drawing data when specific specifications for the aforementioned transmission tower are input.

[0013] With this configuration, it is possible to easily verify whether a predetermined clearance is secured in the design of the transmission tower by inputting only specific parameters.

[0014] Furthermore, the clearance examination system according to the present invention is In the drawing data of the transmission tower and the live part of the insulator device placed on the transmission tower, a second position identification unit identifies a second position at the outer edge of the work area set as an area where a worker who has climbed the transmission tower may be present, which serves as a reference when measuring the second clearance relating to the safety distance between the live part and the worker. In the aforementioned drawing data, a second clearance measuring unit measures the second clearance from the charging unit to the second position, The system includes an output unit that displays the second clearance on the drawing data.

[0015] With this configuration, the second clearance is displayed on the drawing data, making it easy to confirm whether a safe approach distance (a predetermined clearance) is secured between the live part and the outer edge of the work area in the design of the transmission tower. [Effects of the Invention]

[0016] As described above, according to the present invention, it is possible to provide a clearance consideration system that can easily confirm whether a predetermined clearance is ensured in the design of a steel tower.

Brief Description of the Drawings

[0017] [Figure 1] FIG. 1 is a functional block diagram of the clearance consideration system according to the present embodiment. [Figure 2A] FIG. 2A is a diagram showing an example of a screen for inputting specific specifications regarding a steel tower. [Figure 2B] FIG. 2B is a diagram showing the positions corresponding to each item of the column installation conditions in the table of FIG. 2A. [Figure 3A] FIG. 3A is a front view of a steel tower created based on the specific specifications input in the table of FIG. 2A. [Figure 3B] (a) of FIG. 3B is a view of the topmost cross arm of the created steel tower as seen from above, (b) is a view of the second cross arm from the top of the created steel tower as seen from above, and (c) is a view of the third cross arm from the top of the created steel tower as seen from above. [Figure 4A] FIG. 4A is a diagram showing an example of a clearance diagram in a state where the drawn steel tower is viewed from the front. [Figure 4B] (a) of FIG. 4B is an example of a clearance diagram in a state where the topmost cross arm of the drawn steel tower is viewed from above, (b) is an example of a clearance diagram in a state where the second cross arm from the top of the drawn steel tower is viewed from above, and (c) is an example of a clearance diagram in a state where the third cross arm from the top of the drawn steel tower is viewed from above. [Figure 5A] FIG. 5A is a diagram showing an example of a safety distance consideration diagram in a state where the drawn steel tower is viewed from the front. [Figure 5B]Figure 5B shows, (a) an example of a safety distance calculation diagram for the drawn transmission tower, with the uppermost crossarm viewed from above; (b) an example of a safety distance calculation diagram for the drawn transmission tower, with the second crossarm from the top viewed from above; and (c) an example of a safety distance calculation diagram for the drawn transmission tower, with the third crossarm from the top viewed from above. [Figure 6A] Figure 6A shows the clearance diagram and the safety distance calculation diagram superimposed on the drawn transmission tower as viewed from the front. [Figure 6B] Figure 6B(a) shows the clearance diagram and safety distance calculation diagram superimposed on the uppermost crossarm of the drawn transmission tower, viewed from above; (b) shows the clearance diagram and safety distance calculation diagram superimposed on the second crossarm from the top of the drawn transmission tower, viewed from above; and (c) shows the clearance diagram and safety distance calculation diagram superimposed on the third crossarm from the top of the drawn transmission tower, viewed from above. [Figure 7A] Figure 7A is a diagram illustrating the method for deriving the minimum difference value in a clearance diagram of a suspension tower. [Figure 7B] Figure 7B is a diagram illustrating the method for deriving the minimum difference value in the clearance diagram of a tension tower. [Figure 8] Figure 8 is a flowchart showing the process of examining various clearances for a transmission tower using the clearance analysis system described above. [Figure 9] Figure 9 shows the subroutine used to calculate the values ​​for various clearances in the flowchart described above. [Modes for carrying out the invention]

[0018] The following describes one embodiment of the present invention with reference to Figures 1 to 9.

[0019] The clearance analysis system according to this embodiment is a system that allows for easy confirmation of whether various clearances (spacing) on ​​a transmission tower, such as the clearance between the power lines and the tower, are secured during the design of the transmission tower. Furthermore, this clearance analysis system generates drawings of the transmission tower, that is, creates drawing data for the transmission tower, when specific specifications of the transmission tower are input.

[0020] The clearance calculation system 1 of this embodiment is incorporated into a computer or the like and includes a clearance calculation unit 3 that calculates values ​​for various clearances from drawing data for the transmission tower 5 (see Figures 3A and 3B), as shown in Figure 1, and an output unit 4 that displays (outputs) the calculation results of the clearance calculation unit 3 on a display unit (monitor, etc.) 11 of the computer or the like. The clearance calculation system 1 of this embodiment also includes a drawing unit 2 that creates drawing data for the transmission tower 5.

[0021] The drawing unit 2 creates drawing data for the transmission tower 5 when specific specifications for the transmission tower 5 are input. Specifically, in the clearance study system 1 of this embodiment, drawing data for the transmission tower 5 (see Figures 3A and 3B) is created when specific specifications for the transmission tower 5 are input into a predetermined column (for example, a column marked with a dot in the table in Figure 2A) of the table displayed in the display unit 11. Furthermore, the drawing unit 2 of this embodiment creates a clearance diagram of the transmission tower 5 (drawing data: see Figures 4A and 4B) and a safety distance study diagram (drawing data: see Figures 5A and 5B) when specific specifications for the transmission tower 5 are input into a predetermined column of the table.

[0022] Figures 3A, 4A, and 5A show the transmission tower 5 viewed from the front. In addition, in Figures 3B(a) to (c), 4B(a) to (c), and 5B(a) to (c), each (a) shows the topmost crossarm 52 viewed from above, each (b) shows the second crossarm 52 from the top viewed from above, and each (c) shows the third crossarm 52 from the top viewed from above.

[0023] In the clearance analysis system 1 of this embodiment, the drawing unit 2 creates drawing data for the transmission tower 5 by selectively inputting the items (values, etc.) necessary for the transmission tower 5 to be drawn from among the items of pole mounting conditions, common conditions, individual conditions, required separation, etc., and drawing margins, as specific parameters. Specifically, the drawing unit 2 of this embodiment creates drawing data for the transmission tower 5 (see diagram of transmission tower 5 (see Figures 3A and 3B), clearance diagram of transmission tower 5 (see Figures 4A and 4B), and safety distance analysis diagram (see Figures 5A and 5B)) by inputting specific parameters into the columns (items) marked with dots in the table shown in Figure 2A.

[0024] Here, the input values ​​(dimensions) in each column of the "Pole Mounting Conditions" in the table in Figure 2A are the dimensions of each part of the transmission tower 5 shown in Figure 2B (the part indicated by the corresponding symbol). Also, the input values ​​(angles) in each column of the "Common Conditions" in the table in Figure 2A are the values ​​(angles) of the parts indicated by θ1 and θ2 in the clearance diagrams shown in Figures 7A and 7B. Furthermore, the input values ​​(dimensions) in each column of the "Individual Conditions" in the table in Figure 2A are the dimensions of each part (the part indicated by the corresponding symbol) in the safety distance calculation diagrams shown in Figures 5A and 5B.

[0025] The clearance calculation unit 3 calculates values ​​for various clearances from the drawing data created by the drawing unit 2. Specifically, the clearance calculation unit 3 includes a first position identification unit 31, a first clearance measurement unit 32, a difference derivation unit 33, and a comparison unit 34. The clearance calculation unit 3 also includes a second position identification unit 35 and a second clearance measurement unit 36. Furthermore, the clearance calculation unit 3 includes a third clearance measurement unit 37.

[0026] The first position identification unit 31 identifies the first position P1, which serves as the reference point when measuring the first clearance CL1 related to the insulation between the tower 5 and the electric wire Ew, in the clearance diagram (drawing data) shown in Figures 4A and 4B. Specifically, as shown in Figures 7A and 7B, the first position identification unit 31 derives a first orthogonal line β1 that passes through the position of the electric wire Ew and is perpendicular to the first reference line (dashed line in Figures 7A and 7B) α1 on the tower body 51 and crossarms 52 of the tower 5, and derives the first position P1, which is the intersection point of this derived first orthogonal line β1 and the first reference line α1. Here, the first reference line α1 is a line relating to the outermost position on the tower body 51 and crossarms 52, taking into account step bolts (part of the tower body 51 and crossarms 52) provided on the tower body 51 and crossarms 52.

[0027] In this embodiment, the first position identification unit 31 derives a first position P1 at each location when there are multiple locations to consider for the insulation gap between a single electric wire Ew and the tower 5 (in the example shown in Figure 7A, there are two locations on the tower body 51 and one location on the crossarm 52). Furthermore, when considering the lateral swing angles θ1 and θ2 of the electric wire Ew, the first position P1 is derived for each of the following positions: the initial position P11, the position P12 at the lateral swing angle θ1, and the position P13 at the lateral swing angle θ2. Note that the reference numerals (a, b, θ1, θ2, L1) in Figures 7A and 7B indicate the same symbols as those listed in the table in Figure 2A.

[0028] Furthermore, in the clearance diagram (see Figure 4B) showing each crossarm 52 viewed from above, the first position identification unit 31 identifies the first position P1 based on the outer (farthest from the crossarm 52) live part (horn) 56 (more specifically, the end of the live part 56) as a reference, instead of the electric wire Ew.

[0029] The first clearance measurement unit 32 measures the first clearance CL1, which is the distance from the electric wire Ew to the first position P1 on the first orthogonal line β1 in the clearance diagram (see Figures 7A and 7B). When the first position identification unit 31 derives multiple first positions P1 for a single electric wire Ew, the first clearance measurement unit 32 measures the first clearance CL1 from the electric wire Ew to each of the first positions P1.

[0030] Furthermore, in the clearance diagram (see Figure 4B) showing each arm 52 viewed from above, the first clearance measuring unit 32 measures the distance (first clearance CL1) from the outer charging part 56 to the first position P1 on the first orthogonal line β1.

[0031] The difference derivation unit 33 derives the difference (difference value) D1 between the first clearance CL1 and a preset insulation interval (the standard insulation interval a or abnormal insulation interval b entered in the table in Figure 2A). When multiple first clearances CL1 are measured (deriveted) for a single wire Ew by the first clearance measurement unit 32, the difference derivation unit 33 derives the difference (difference value) D1 between each first clearance CL1 and the corresponding insulation intervals a and b.

[0032] In this derivation, when the first clearance CL1 is greater than the insulation spacings a and b, the difference value D1 is a positive number. Conversely, when the first clearance CL1 is less than the insulation spacings a and b, the difference value D1 is a negative number. Furthermore, when the first clearance CL1 and the insulation spacings a and b are the same value (dimension), the difference value D1 is 0.

[0033] Furthermore, in the clearance diagram (see Figure 4B) showing each crossarm 52 viewed from above, the difference derivation unit 33 derives the difference (difference value D1) between the first clearance CL1 and the preset standard insulation interval a.

[0034] When the difference derivation unit 33 has derived multiple difference values ​​D1 for a single wire Ew or the outer live part 56, the comparison unit 34 derives (selects) the smallest difference value (minimum difference value) D1min from among these multiple difference values ​​D1 and outputs this derivation result to the output unit 4. In the example shown in Figure 7A, the difference derivation unit 33 derives three difference values ​​D1 for a single wire Ew, and the comparison unit 34 derives the minimum difference value D1min from these three difference values ​​D1.

[0035] The second position identification unit 35 identifies the second position P2 at the outer edge α2 of the work area Ar, which is set as the area where a worker who has climbed the tower 5 may be located, in the safety distance study diagram (drawing data) shown in Figures 5A and 5B, and which serves as the reference point when measuring the second clearance CL2 related to the worker's safety distance. Specifically, the second position identification unit 35 derives a second orthogonal line β2 that passes through the live part 56 of the insulator device 55 (more specifically, the end of the live part 56 that is closer to the tower 5 and the power line Ew) and is perpendicular to the outer edge α2 of the work area Ar (if the outer edge α2 is an arc, it is perpendicular to the tangent to the outer edge (arc) α2), and derives the second position P2, which is the intersection point of this derived second orthogonal line β2 and the outer edge α2 of the work area Ar.

[0036] The second clearance measurement unit 36 ​​measures the second clearance CL2, which is the distance from the charging unit 56 to the second position P2 on the second orthogonal line β2 in the safety distance calculation diagram, and outputs the measurement result to the output unit 4.

[0037] In the output of this second clearance CL2, when the end of the charging part 56 is outside the working area Ar, the second clearance CL2 is a positive value. Conversely, when the end of the charging part 56 is inside the working area Ar, the second clearance CL2 is a negative value. Furthermore, when the end of the charging part 56 is on the outer edge α2 of the working area Ar, the second clearance CL2 is 0.

[0038] The third clearance measurement unit 37 measures the third clearance CL3, which is the shortest distance from the electric wire Ew to the outer edge α2 of the working area Ar in the clearance diagram (see Figure 5A). In this embodiment, the third clearance measurement unit 37 outputs the measured third clearance CL3 (measurement result) to the output unit 4.

[0039] In the output of this third clearance CL3, when the wire Ew is outside the working area Ar, the third clearance CL3 will be a positive value. Conversely, when the wire Ew is inside the working area Ar, the third clearance CL3 will be a negative value. Furthermore, when the wire Ew is on the outer edge α2 of the working area Ar, the third clearance CL3 will be 0.

[0040] The output unit 4 displays the difference (difference value D1) between the first clearance CL1 and the preset insulation intervals a and b on the clearance diagram. In this embodiment, the output unit 4 displays the clearance diagram and the minimum difference value (numerical value) D1min on the display unit 11.

[0041] Furthermore, the output unit 4 displays the second clearance CL2 on the safety distance calculation diagram. In this embodiment, the output unit 4 displays the safety distance calculation diagram and the second clearance (numerical value) CL2 on the display unit 11.

[0042] Furthermore, the output unit 4 displays the third clearance CL3 (measurement result of the third clearance measurement unit 37) on the clearance diagram. In this embodiment, the output unit 4 displays the clearance diagram and the third clearance (numerical value) CL3 on the display unit 11.

[0043] In this embodiment, the output unit 4 displays the clearance diagram, safety distance calculation diagram, minimum difference value D1min, second clearance CL2, and third clearance CL3 on the display unit 11 in an overlaid state (see Figures 6A and 6B).

[0044] Next, we will explain the flow for considering various clearances in the clearance analysis system 1, referring to Figures 8 and 9.

[0045] When the clearance calculation system 1 is started, a table for inputting specific parameters (see Figure 2A) is displayed on the display unit 11. When specific parameters are entered into this table (more specifically, each column indicated by a dot in the table in Figure 2A) (step S1), the drawing unit 2 performs the following: creating drawing data for the transmission tower 5 (step S2), creating a clearance diagram based on the drawing data for the transmission tower 5 (drawing data: see Figures 4A and 4B) (step S3), and creating a safety distance calculation diagram based on the drawing data for the transmission tower 5 (drawing data: see Figures 5A and 5B) (step S4). At this time, steps S3 and S4 may be performed simultaneously, or in reverse order (i.e., in the order of step S4 followed by step S3).

[0046] In the clearance diagram created in step S3, for example, as shown in Figure 7A, if the drawn tower 5 is a suspension tower, the standard insulation interval a is used as the insulation interval when the lateral swing angle of the suspension insulator string is from 0° to 20°, and the abnormal insulation interval b is used as the insulation interval when the lateral swing angle of the suspension insulator string is from 20° to 70°. In Figure 7A, the length of the insulator string is indicated by L1, the initial position of the wire Ew is indicated by P11, the position of the wire Ew when the lateral swing angle of the suspension insulator string is 20° is indicated by P12, and the position of the wire Ew when the lateral swing angle of the suspension insulator string is 70° is indicated by P13.

[0047] Furthermore, in the clearance diagram created in step S3, for example, as shown in Figure 7B, if the drawn tower 5 is a tension tower, the standard insulation interval a is used as the insulation interval when the jumper's lateral swing angle is from 0° to 15°, and the abnormal insulation interval b is used as the insulation interval when the jumper's lateral swing angle is from 15° to 60°. In Figure 7B, the initial position of the wire Ew is shown at P21, the position of the wire Ew when the jumper's lateral swing angle is 15° is shown at P22, and the position of the wire Ew when the jumper's lateral swing angle is 60° is shown at P23.

[0048] Next, the clearance calculation unit 3 calculates values ​​for various clearances from the drawing data (drawing data for the transmission tower 5, clearance diagram, safety distance calculation diagram, etc.) (step S5). Specifically, it is as follows.

[0049] The first position identification unit 31 identifies the first position P1 for each electric wire Ew (step S51). At this time, if there are multiple parts of the tower 5 (for example, the tower body 51, the crossarm 52) for which insulation intervals a and b should be considered for a single electric wire Ew, or if insulation intervals a and b should be considered for each position P11, P12, P13, P21, P22, P23 of the electric wire Ew, the first position identification unit 31 identifies the first position P1 for each of them.

[0050] In the example shown in Figure 7A, the first position identification unit 31 identifies the first position P1 on the crossarm 52 when the electric wire Ew is at positions P11, P12, and P13, and identifies the first position P1 on the tower body 51 when the electric wire Ew is at positions P11, P12, and P13. In this case, the first orthogonal line β1 does not intersect with an arc with radii a and b from the electric wire Ew at positions P11, P12, and P13, so the first position P1 is not identified. For example, if the first orthogonal line β1 is drawn from the electric wire Ew at position P11 to the first reference line α1 of the crossarm 52, the first orthogonal line β1 does not intersect with the arc A1 centered on the electric wire Ew at position P11 and with radius a, standard insulation spacing a, so the first position P1 when the electric wire Ew is at position P11 is not identified.

[0051] Furthermore, for example, as shown in the second right-hand crossarm 52 from the top in Figure 4A, if the first orthogonal line β1 drawn from the wire Ew at position P12 passes outside (to the right of) the end of the first reference line α1 (more specifically, the right end), the first position identification unit 31 designates the line passing between the wire Ew at position P12 and the end of the first reference line α1 as the first pseudo-orthogonal line β1a, and identifies the intersection point of this first pseudo-orthogonal line β1a and the first reference line α1 as the first position P1.

[0052] Similarly, in the example shown in Figure 7B, the first position identification unit 31 identifies the first position P1 on the crossarm 52 when the electric wire Ew is at positions P21, P22, and P23, and identifies the first position P1 on the tower body 51 when the electric wire Ew is at positions P21, P22, and P23. In this case, the first orthogonal line β1 does not intersect the arc A1 which is centered on the electric wire Ew at positions P21, P22, and P23 and has radii of insulation intervals a and b, so the first position P1 is not identified.

[0053] Furthermore, in the example shown in Figure 4A, since the insulator string extending from the rightmost crossarm 52 is fixed, the first position identification unit 31 identifies the first position P1 at the crossarm 52 and the first position P1 at the tower body 51 when the electric wire Ew is at position P11.

[0054] Next, the first clearance measurement unit 32 measures the distance (first clearance CL1) from the electric wire Ew to the first position P1 on the first reference line α1 derived when identifying the first position P1 for each electric wire Ew (step S52).

[0055] In the example shown in Figure 7A, the first clearance measuring unit 32 measures the first clearance CL1 from the electric wire Ew to the crossarm 52 (specifically, the first reference line α1) when the electric wire Ew is at position P11, the first clearance CL1 from the electric wire Ew to the crossarm 52 (specifically, the first reference line α1) when the electric wire Ew is at position P12, and the first clearance CL1 from the electric wire Ew to the tower body 51 (specifically, the first reference line α1) when the electric wire Ew is at position P13. In the example shown in Figure 4A, since the insulator string extending from the uppermost right crossarm 52 is fixed, the first clearance measuring unit 32 measures the first clearance CL1 from the electric wire Ew to the crossarm 52 (specifically, the first reference line α1) and the first clearance CL1 from the electric wire Ew to the tower body 51 (specifically, the first reference line α1).

[0056] When each first clearance CL1 is measured, the difference derivation unit 33 derives a difference value D1, which is the difference between each first clearance CL1 and the insulation distance (standard insulation interval a or abnormal insulation interval b) corresponding to the first clearance CL1 (step S53). If multiple difference values ​​D1 are derived for a single wire Ew (step S54: Yes), the comparison unit 34 derives (selects) the minimum difference value D1min from the multiple difference values ​​D1 (step S55) and outputs the minimum difference value D1min to the output unit 4 (step S56).

[0057] On the other hand, if a difference value D1 is derived for one electric wire Ew (step S54: No), this difference value D1 is output to the output unit 4.

[0058] Furthermore, in the clearance diagram (see Figure 4B) showing each crossarm 52 viewed from above, steps S51 to S54 described above are performed between the outer charging part 56 (more specifically, the end of the outer charging part 56) and the tower body 51 or crossarm 52, and the derived difference value D1 (or minimum difference value D1min) is output to the output unit 4.

[0059] Furthermore, the second position identification unit 35 identifies a second position P2 corresponding to each charging part 56 at the outer edge α2 of the working area Ar of the safety distance study diagram (drawing data) (step S57: see Figure 5B), and the second clearance measurement unit 36 ​​measures the distance from the end of the charging part 56 to the second position P2 on the second orthogonal line β2 derived when identifying the second position P2 (second clearance CL2) (step S58), and outputs the measurement result (second clearance CL2) to the output unit 4 (step S59).

[0060] Furthermore, the third clearance measurement unit 37 measures the third clearance CL3 from the wire Ew (in its initial position) in a state where it is not swinging laterally (position P11 in the example shown in Figure 7A) to the outer edge α2 of the working area Ar in the clearance diagram (step S60), and outputs the measured third clearance CL3 to the output unit 4 (step S61).

[0061] Once the values ​​for various clearances are calculated in this manner, the output unit 4 displays the drawing data for the transmission tower 5 (a diagram in which the clearance diagram and the safety distance calculation diagram are superimposed on the drawing data for the transmission tower 5) on the display unit 11, and also displays the minimum difference value D1min (or difference value D1), the second clearance CL2, and the third clearance CL3 at the corresponding positions on the drawing data (step S6: see Figures 6A and 6B).

[0062] If the minimum difference value D1min (or difference value D1), the second clearance CL2, and the third clearance CL3 displayed on the drawing data in this display unit 11 are all positive values ​​(step S7: Yes), then in the design of the transmission tower 5, all predetermined clearances (insulation spacing and approach safety distance) at each position of the transmission tower 5 are secured, and the design of the transmission tower 5 is completed.

[0063] On the other hand, if any of the minimum difference value D1min (or difference value D1), the second clearance CL2, and the third clearance CL3 displayed on the drawing data in the display unit 11 are negative (step S7: No), then the insulation gap or approach safety distance at that location is not secured, and it is necessary to return to step S1 and redesign the tower 5 (change specific specifications).

[0064] Furthermore, steps S51-S56, steps S57-S59, and steps S60-S61 may be performed simultaneously, and their order may be changed.

[0065] The clearance analysis system 1 described above includes: a first position identification unit 31 that identifies a first position P1 which serves as a reference when measuring the first clearance CL1 related to the insulation between the tower 5 and the electric wire Ew in the clearance diagram (drawing data of the tower 5 and the electric wire Ew placed on the tower 5: see Figures 4A and 4B); a first clearance measurement unit 32 that measures the first clearance CL1 from the electric wire Ew to the first position P1 in the clearance diagram; and an output unit 4 that displays the difference (difference value) D1 or D1min between the first clearance CL1 and preset insulation intervals a and b on the clearance diagram (drawing data).

[0066] In this way, the difference between the first clearance CL1 and the insulation intervals a and b (difference value D1 or D1min) is displayed on the clearance diagram, making it easy to confirm whether the insulation intervals (predetermined clearances) a and b are secured between the power line Ew and the tower 5 in the design of the tower 5.

[0067] Furthermore, the clearance study system 1 of this embodiment includes a second position identification unit 35 that identifies a second position P2 on the outer edge α2 of the work area Ar, which is set as an area where a worker climbing the tower 5 may be present, in the safety distance study diagram (drawing data: see Figure 5B), and a second clearance measurement unit 36 ​​that measures a second clearance CL2 related to the worker's safety distance in the safety distance study diagram. The safety distance study diagram includes the live part 56 of the insulator device 55 arranged on the tower 5, the second position P2 is the reference position when measuring the second clearance CL2, the second clearance CL2 is the distance from the live part 56 to the second position P2, and the output unit 4 displays the second clearance CL2 on the safety distance study diagram (drawing data). In this way, since the second clearance CL2 is displayed on the safety distance study diagram, it is easy to confirm whether a safety distance (predetermined clearance) is secured between the live part 56 and the outer edge α2 of the work area Ar in the design of the tower 5.

[0068] Furthermore, the clearance calculation system 1 of this embodiment includes a third clearance measurement unit 37 that measures the third clearance CL3, which is the shortest distance from the electric wire Ew to the outer edge α2 of the work area Ar, in the safety distance calculation diagram (drawing data: see Figure 5A). The output unit 4 then displays the third clearance CL3 on the safety distance calculation diagram. In this way, since the shortest distance (third clearance) CL3 from the electric wire Ew to the outer edge α2 of the work area Ar is displayed on the safety distance calculation diagram, it is easy to confirm whether or not a safe distance (predetermined clearance) is secured in the design of the transmission tower.

[0069] Furthermore, the clearance analysis system 1 of this embodiment includes a drawing unit 2 that creates drawing data for the transmission tower 5 (see Figures 3A and 3B) when specific specifications for the transmission tower are input. This makes it easy to confirm whether a predetermined clearance is secured in the design of the transmission tower 5 simply by inputting specific specifications.

[0070] It should be noted that the clearance examination system 1 of the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the spirit of the invention. For example, the configuration of one embodiment can be added to the configuration of another embodiment, and a part of the configuration of one embodiment can be replaced with the configuration of another embodiment. Furthermore, a part of the configuration of one embodiment can be deleted.

[0071] In the clearance analysis system 1 of the above embodiment, by inputting specific parameters, the minimum difference value D1min, the second clearance CL2, and the third clearance CL3 are displayed on a superimposed figure of the clearance diagram (Figures 4A and 4B) and the safety distance analysis diagram (Figures 5A and 5B), but the system is not limited to this configuration.

[0072] For example, the clearance analysis system 1 may be configured to generate a clearance diagram and a safety distance analysis diagram when drawing data of the transmission tower 5 (Figures 3A and 3B) created by another system or CAD is input, and the minimum difference value D1min (or difference value D1), the second clearance CL2, and the third clearance CL3 are displayed on these diagrams (drawing data). In other words, the clearance analysis system 1 may be configured without a drawing unit 2.

[0073] Furthermore, the clearance analysis system 1 may be configured to separately display a clearance diagram showing the minimum difference value D1min or the difference value D1, and a safety distance analysis diagram showing the second clearance CL2 and the third clearance CL3.

[0074] Furthermore, the clearance examination system 1 described above can examine (confirm) whether insulation gaps a and b are secured between the electric wire Ew and the transmission tower 5, and whether a safe approach distance is secured between the electric wire Ew or the live part 56 and the work area, but it is not limited to this configuration. The clearance examination system 1 only needs to be able to examine (confirm) whether insulation gaps a and b are secured.

[0075] Furthermore, while the above-described clearance analysis system 1 measures a first clearance CL1, a second clearance CL2, and a third clearance CL3, it is not limited to this configuration. The clearance analysis system 1 may be configured to measure only the first clearance CL1, or only the second clearance CL2, or only the third clearance CL3. In other words, the clearance analysis system 1 may be configured to measure at least one type of clearance CL1, CL2, and CL3, and to display the measured clearance values ​​CL1, CL2, and CL3, as well as the difference values ​​D1 with insulation distances a and b, etc., on the plotting data.

[0076] Furthermore, although the clearance calculation system 1 derives the difference values ​​D1 and D1min only for the first clearance CL, it is not limited to this configuration. The clearance calculation system 1 may also be configured to derive the difference values ​​from a predetermined safety distance for the second clearance CL2 and the third clearance CL3, and output these derive results (e.g., by displaying them on a display unit). [Explanation of Symbols]

[0077] 1...Clearance calculation system, 2...Drawing unit, 3...Clearance calculation unit, 31...First position identification unit, 32...First clearance measurement unit, 33...Difference derivation unit, 34...Comparison unit, 35...Second position identification unit, 36...Second clearance measurement unit, 37...Third clearance measurement unit, 4...Output unit, 5...Transmission tower, 51...Tower body, 52...Crossarm, 55...Insulator device, 56...Charging unit, 11...Display unit, a...Standard insulation interval (insulation interval), b...Insulation gap during abnormal conditions (insulation gap), A1...Arc of the clearance diagram, Ar...Work area, CL1...First clearance, CL2...Second clearance, CL3...Third clearance, D1...Difference value, D1min...Minimum difference value, Ew...Electric wire, P1...First position, P2...Second position, α1...First reference line, α2...Outer edge, β1...First orthogonal line, β1a...First pseudo-orthogonal line, β2...Second orthogonal line, θ1, θ2...Transverse angle

Claims

1. In the drawing data of a transmission tower and the power lines arranged on the transmission tower, a first position identification unit identifies a first position that serves as a reference when measuring the first clearance for insulation between the transmission tower and the power lines, In the aforementioned drawing data, a first clearance measuring unit measures the first clearance from the electric wire to the first position, A clearance analysis system comprising: an output unit that displays the difference between the first clearance and a preset insulation interval on the drawing data.

2. In the aforementioned drawing data, a second position identification unit identifies a second position on the outer edge of the work area, which is set as an area where workers who climbed the tower may be present, The drawing data includes a second clearance measuring unit that measures a second clearance related to the safety distance of the worker, The aforementioned drawing data includes the charging section of the insulator device to be placed on the transmission tower. The aforementioned second position is a reference position when measuring the aforementioned second clearance. The second clearance is the distance from the charging part to the second position. The clearance analysis system according to claim 1, wherein the output unit displays the second clearance on the drawing data.

3. The drawing data includes a third clearance measuring unit that measures the third clearance, which is the shortest distance from the electric wire to the outer edge of the work area. The clearance analysis system according to claim 2, wherein the output unit displays the third clearance on the drawing data.

4. The clearance calculation system according to any one of claims 1 to 3, further comprising a drawing unit that creates the drawing data when specific specifications for the aforementioned transmission tower are input.

5. In the drawing data of the transmission tower and the live part of the insulator device placed on the transmission tower, a second position identification unit identifies a second position at the outer edge of the work area set as an area where a worker who has climbed the transmission tower may be present, which serves as a reference when measuring the second clearance relating to the safety distance between the live part and the worker. In the aforementioned drawing data, a second clearance measuring unit measures the second clearance from the charging unit to the second position, A clearance analysis system comprising: an output unit for displaying the second clearance on the drawing data.

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