An automatic measuring device and method for the size parameters of the shed of a composite insulator

Abstract

The present application discloses an automatic measuring device and method for the size parameters of a composite insulator shed. The device includes a measuring system, a data analysis system, and a measuring device bracket. The measuring system can move back and forth along the axial direction of the composite insulator. The measuring system is used to measure the moving distance of the measuring system in the axial direction of the composite insulator and the linear distance from the outer surface of the composite insulator shed. The data analysis system is connected to the measuring system. The data analysis system is used to draw the creepage path on the outer surface of the composite insulator shed according to the moving distance and the linear distance measured by the measuring system, and calculate the size parameters of the composite insulator shed, including at least the dry arc distance, the creepage distance, the shed shape parameters, and the distribution trend of the shed thickness. The measuring device bracket is used for installing the measuring system. The automatic measuring device for the size parameters of the composite insulator shed in the present application can achieve efficient and accurate measurement of the creepage distance of the composite insulator.

Description

Technical Field

[0001] The present application relates to the field of high-voltage insulator test research, and in particular to a composite insulator sheath dimension parameter automatic measurement device and method. Background Art

[0002] Composite insulators have the advantages of good pollution flashover resistance and light weight. They have been widely promoted and applied in my country's power grid since the 1980s. They are widely used in 10kV distribution networks to ultra-high voltage transmission projects. As of 2021, there are more than 10 million composite insulators in service in my country's transmission lines with voltage levels of 110kV and above.

[0003] like Figure 1 As shown, the composite insulator 1 is composed of an insulating core 10, an umbrella cover 11 and an end fitting 12. The umbrella cover size parameters are the basis for ensuring the external insulation performance of the composite insulator, including the dry arc distance, creepage distance, umbrella cover thickness and umbrella shape parameters (minimum umbrella cover thickness, umbrella extension, ratio of umbrella spacing to umbrella extension, minimum distance between umbrellas, ratio of creepage distance to spacing, umbrella inclination angle, creepage coefficient, etc.).

[0004] Dimension inspection is a test item that must be carried out for random inspection of composite insulators. As the voltage level increases, the structural dimensions of composite insulators also increase.

[0005] Creepage distance measurement is the most labor-intensive item in dimensional inspection. Table 1 gives the maximum creepage distance of rod-type suspension composite insulators of different voltage levels. It can be seen that for AC composite insulators of 750kV and above, the creepage distance has exceeded 20 meters; the creepage distance of DC composite insulators of all voltage levels exceeds 20 meters, and the maximum creepage distance of ±1100kV composite insulators exceeds 63 meters, which brings great difficulty to the creepage distance measurement of composite insulators. At present, the most commonly used creepage distance measurement method for composite insulators is the paper tape measurement method, which is to use sticky paper tape to stick along the surface of the composite insulator, remove it and then measure the length. Taking ±800kV composite insulators (creepage distance is about 45m) as an example, using the paper tape method, it takes about 3 hours for two test personnel to cooperate in measuring one insulator, which is time-consuming and labor-intensive, and has low accuracy.

[0006] Table 1 Main dimensional parameters of rod-shaped suspension composite insulators

[0007]

[0008] In addition to creepage distance measurement, the size inspection of composite insulators also includes the inspection of the minimum thickness of the shed. The current method is to cut open the composite insulator at three randomly selected positions and measure the minimum thickness of the shed. The minimum value measured should meet the standard requirements. Due to the eccentricity during the forming stage of the composite insulator shed, that is, the shed thickness is uneven along the axial direction of the composite insulator, the randomness of measuring the minimum shed thickness at three randomly selected positions is relatively large, and the detection purpose may not be achieved. Summary of the Invention

[0009] The present application provides an automatic measuring device and method for the size parameters of a composite insulator shed, which can achieve efficient and accurate measurement of the creepage distance of the composite insulator; at the same time, the thickness distribution trend of the composite insulator shed can be measured to provide support for the measurement of the minimum shed thickness.

[0010] An embodiment of the present application provides an automatic measuring device for the size parameters of a composite insulator shed, including a measuring system, a data analysis system, and a measuring device support. The measuring system can move back and forth along the axial direction of the composite insulator. The measuring system is used to measure the moving distance of the measuring system along the axial direction of the composite insulator and the straight-line distance from the outer surface of the composite insulator shed. The data analysis system is connected to the measuring system. The data analysis system is used to draw the creepage path of the outer surface of the composite insulator shed according to the moving distance and the straight-line distance measured by the measuring system, and calculate the size parameters of the composite insulator shed including at least the dry arc distance, creepage distance, umbrella shape parameters, and the thickness distribution trend of the shed. The measuring device support is used for installing the measuring system.

[0011] In some of these embodiments, the measuring system includes a moving mechanism, a horizontal distance measuring module, and a vertical distance measuring module. The moving mechanism is located at the top of the measuring system. The moving mechanism is used to enable the measuring system to be slidably installed on the measuring device support along the axial direction of the composite insulator back and forth. The horizontal distance measuring module is located on both sides of the measuring system in the axial direction of the composite insulator. The horizontal distance measuring module is used to measure the moving distance of the measuring system in the axial direction of the composite insulator. The vertical distance measuring module is located at the bottom of the measuring system. The vertical distance measuring module is used to measure the straight-line distance between the measuring system and the outer surface of the composite insulator shed.

[0012] In some of these embodiments, the vertical distance measuring module can rotate around the extension direction of the axis of the composite insulator, so that when the measuring system slides back and forth along the axial direction of the composite insulator once, the vertical distance measuring module keeps measuring in the vertical direction during the forward journey, and the vertical distance measuring module deflects by 10° - 20° during the return journey to measure, so as to realize the measurement of the straight-line distance of all positions along a certain creepage path on the outer surface of the composite insulator shed.

[0013] In some of these embodiments, the measuring device bracket includes a guide rail and a guide rail bracket. The guide rail is arranged above the composite insulator along the axial direction of the composite insulator and is used for the sliding installation of the measuring system. There are two guide rail brackets, both of which are supported below the guide rail and are respectively arranged at both ends of the guide rail.

[0014] In some of these embodiments, the measuring device bracket further includes a positioning module. There are two positioning modules, which are respectively installed at both ends of the guide rail. Both of the two positioning modules are used to measure the linear distance between the guide rail and the end of the composite insulator to ensure that the guide rail is parallel to the axis of the composite insulator.

[0015] In some of these embodiments, both bottoms of the two guide rail brackets have two feet, and the space between the feet is used to accommodate the end fitting of the composite insulator. Both tops of the two guide rail brackets have supports, which are used for the laser emitted by the horizontal distance measuring module of the measuring system to irradiate.

[0016] The embodiments of the present application also provide a method for automatically measuring the size parameters of the composite insulator shed sleeve by using the composite insulator shed sleeve size parameter automatic measuring device in any of the above embodiments, including the following steps: Horizontally arrange the composite insulator. Adjust the measuring device bracket so that the movement trajectory of the measuring system is parallel to the axis of the composite insulator in the same vertical plane. Make the measuring system move from one end of the composite insulator to the other end, and measure the movement distance of the measuring system and the linear distance from the outer surface of the composite insulator shed sleeve. Let the data analysis system draw the creepage path of the outer surface of the composite insulator shed sleeve according to the movement distance and the linear distance measured by the measuring system, and calculate the size parameters of the composite insulator shed sleeve including at least the dry arc distance, creepage distance, shed shape parameter and shed sleeve thickness distribution trend.

[0017] In some of these embodiments, adjusting the measuring device bracket so that the movement trajectory of the measuring system is parallel to the axis of the composite insulator in the same vertical plane includes: Using the positioning module to adjust the guide rail so that the guide rail is parallel to the axis of the composite insulator in the same vertical plane, and marking the starting position and the ending position of the movement process of the measuring system on the guide rail.

[0018] In some of these embodiments, before making the measuring system move from one end of the composite insulator to the other end, zero the horizontal distance measuring module and the vertical distance measuring module.

[0019] In some of these embodiments, making the measuring system move from one end of the composite insulator to the other end, and measuring the movement distance of the measuring system and the linear distance from the outer surface of the composite insulator shed sleeve includes:

[0020] Move the measuring system from one end of the composite insulator to the other end, measure the moving distance through the horizontal distance measuring module, and keep the vertical direction to measure the straight-line distance through the vertical distance measuring module. Deflect the vertical distance measuring module by 10° to 20°, move the measuring system from the other end of the composite insulator to one end, measure the moving distance through the horizontal distance measuring module, and measure the straight-line distance through the vertical distance measuring module.

[0021] An automatic measuring device for the size parameters of the shed of a composite insulator provided by an embodiment of the present application includes a measuring system, a data analysis system, and a measuring device bracket. The measuring system can move back and forth along the axis of the composite insulator. The measuring system is used to measure the moving distance of the measuring system along the axis of the composite insulator and the straight-line distance from the outer surface of the shed of the composite insulator. The data analysis system is connected to the measuring system. The data analysis system is used to draw the creepage path of the outer surface of the shed of the composite insulator according to the moving distance and the straight-line distance measured by the measuring system, and calculate the size parameters of the shed of the composite insulator including at least the dry arc distance, the creepage distance, the shed shape parameters, and the distribution trend of the shed thickness. The measuring device bracket is used for installing the measuring system. The automatic measuring device for the size parameters of the shed of the composite insulator of the present application can realize the efficient and accurate measurement of the creepage distance of the composite insulator; at the same time, it can measure the distribution trend of the shed thickness of the composite insulator, providing support for the measurement of the minimum shed thickness. In addition, the automatic measuring device for the size parameters of the shed of the composite insulator designed in the present application has a strong data post-processing function, and can automatically calculate the shed shape parameters and evaluate the rationality of the shed shape parameter design. Brief Description of the Drawings

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those skilled in the art, without creative efforts, other drawings can also be obtained according to these drawings.

[0023] Figure 1 It is a schematic structural diagram of a composite insulator in the prior art;

[0024] Figure 2 It is a schematic overall structural diagram of the automatic measuring device for the size parameters of the shed of the composite insulator in the embodiment of the present application;

[0025] Figure 3 It is a schematic partial structural diagram of the automatic measuring device for the size parameters of the shed of the composite insulator in the embodiment of the present application;

[0026] Figure 4 It is a schematic structural diagram of the measuring system in the embodiment of the present application;

[0027] Figure 5 Schematic diagram of the round-trip movement trajectory of the measurement system in the embodiment of the present application;

[0028] Figure 6 Schematic flow chart of the automatic measurement method for the dimension parameters of the shed of a composite insulator in the embodiment of the present application. Specific embodiments

[0029] In order to make the objectives, technical solutions and advantages of the present application clearer and more understandable, the present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0030] Refer to Figures 1-5 In the embodiment of the present application, an automatic measurement device 2 for the dimension parameters of the shed 11 of a composite insulator 1 is provided, which includes a measurement system 20, a data analysis system 21 and a measurement device support 22.

[0031] The measurement system 20 can move back and forth along the axis of the composite insulator 1. The measurement system 20 is used to measure the movement distance of the measurement system 20 along the axis of the composite insulator 1 and the straight-line distance from the outer surface of the shed 11 of the composite insulator 1. The measurement system 20 can specifically be a laser measurement system.

[0032] The measurement system 20 includes a moving mechanism 200, a horizontal distance measurement module 201 and a vertical distance measurement module 202.

[0033] The moving mechanism 200 is located at the top of the measurement system 20. The moving mechanism 200 is used to install the measurement system 20 on the measurement device support 22 so that it can slide back and forth along the axis of the composite insulator 1.

[0034] The horizontal distance measurement module 201 is located on both sides of the measurement system 20 along the axis of the composite insulator 1. The horizontal distance measurement module 201 is used to measure the movement distance of the measurement system 20 along the axis of the composite insulator 1 (which can also be recorded as the sliding distance). The horizontal distance measurement module 201 can specifically be a horizontal laser distance measurement device or an encoder.

[0035] The vertical distance measurement module 202 is located at the bottom of the measurement system 20. The vertical distance measurement module 202 is used to measure the straight-line distance between the measurement system 20 and the outer surface of the shed 11 of the composite insulator 1 (including the straight-line distance measured by the laser 2020 perpendicular to the outer surface of the shed 11 of the composite insulator 1 and the straight-line distance measured by the laser 2021 that forms an acute or obtuse angle with the outer surface of the shed 11 of the composite insulator 1). The vertical distance measurement module 202 can specifically be a vertical laser distance measurement device.

[0036] The vertical distance measuring module 202 can rotate around the extension direction of the axis of the composite insulator 1 (at this time, the vertical distance measuring module 202 has the rotation function). When the measuring system 20 slides back and forth along the axis of the composite insulator 1 once, the vertical distance measuring module 202 keeps measuring the distance in the vertical direction during the forward journey, and the vertical distance measuring module 202 deflects by 10° to 20° to measure the distance during the return journey, so as to realize the measurement of the straight-line distance of all positions along a certain creepage path on the outer surface of the skirt 11 of the composite insulator 1.

[0037] The data analysis system 21 is connected to the measuring system 20. The data analysis system 21 is used to draw the creepage path on the outer surface of the skirt 11 of the composite insulator 1 according to the moving distance and the straight-line distance measured by the measuring system 20, and calculate the composite insulator skirt size parameters including at least the dry arc distance, the creepage distance, the umbrella shape parameters and the skirt thickness distribution trend. Specifically, based on the algorithm program, the data analysis system 21 converts the moving distance and the straight-line distance measured by the measuring system 20 during the round-trip movement into the coordinate points on the outer surface of the skirt 11 of the composite insulator 1. Then, based on the coordinate points, the creepage path on the outer surface of the skirt 11 of the composite insulator 1 is drawn, and the composite insulator skirt size parameters such as the dry arc distance, the creepage distance, the umbrella shape parameters and the skirt thickness distribution trend are calculated.

[0038] The measuring device bracket 22 is used for installing the measuring system 20.

[0039] The measuring device bracket 22 includes a guide rail 220 and a guide rail bracket 221.

[0040] The guide rail 220 is arranged above the composite insulator 1 along the axis of the composite insulator 1. The guide rail 220 is used for the measuring system 20 to be slidably installed. The length of the guide rail 220 is greater than the length of the skirt 11 of the composite insulator 1. At this time, the measuring system 20 sliding on the guide rail 220 can measure the straight-line distance from the outer surface of all skirts 11 of the composite insulator 1.

[0041] There are two guide rail brackets 221. Both of the two guide rail brackets 221 are supported under the guide rail 220 and are respectively arranged at both ends of the guide rail 220.

[0042] The height of the guide rail bracket 221 is greater than the outer diameter of the composite insulator 1. At this time, the guide rail bracket 221 can support the guide rail 220 directly above the composite insulator 1.

[0043] Both bottoms of the two guide rail brackets 221 have two feet 2210. The space between the feet 2210 is used to accommodate the end fitting 12 of the composite insulator 1, so as to facilitate the adjustment of the position of the guide rail bracket 221.

[0044] Both tops of the two guide rail brackets 221 have supports 2211. The supports 2211 are used for the laser emitted by the horizontal distance measuring module 201 of the measuring system 20 to irradiate, so as to measure the moving distance.

[0045] The support 22 of the measuring device further includes a positioning module 222. There are two positioning modules 222, which are respectively installed at both ends of the guide rail 220. Both positioning modules 222 are used to measure the linear distance between the guide rail 220 and the end of the composite insulator 1, so as to ensure that the axis of the guide rail 220 is parallel to the axis of the composite insulator 1. The positioning module 222 can specifically be a laser positioning device.

[0046] The distance between the two positioning modules 222 is greater than the length of the shed 11 of the composite insulator 1. At this time, the positioning module 222 is used to measure the linear distance (which can also be recorded as the vertical distance) from the insulating core rod 10 located between the shed 11 and the end fitting 12 of the composite insulator 1.

[0047] Refer to Figure 6 , the embodiment of the present application further provides a method for automatically measuring the size parameters of the shed 11 of the composite insulator 1 by using the automatic measuring device 2 for the size parameters of the shed 11 of the composite insulator 1 in any of the above embodiments, including the following steps

[0048] Step 1: Horizontally arrange the composite insulator 1.

[0049] In the above step, the horizontal arrangement of the composite insulator 1 specifically means that the axis of the composite insulator 1 extends horizontally. For a rod-shaped suspension composite insulator 1 with a small diameter, a tensile force needs to be applied at both ends of the insulator to ensure the straightness of the composite insulator 1.

[0050] Step 2: Adjust the support 22 of the measuring device so that the movement trajectory of the measuring system 20 is parallel to the axis of the composite insulator 1 in the same vertical plane.

[0051] The above step specifically means: using the positioning module 222 to adjust the guide rail 220 so that the guide rail 220 is parallel to the axis of the composite insulator 1 in the same vertical plane, and marking the starting position and the ending position of the movement process of the measuring system 20 on the guide rail 220. The starting position is located at one end of the measuring system 20, and the ending position is located at the other end of the measuring system 20.

[0052] Step 3: Make the measuring system 20 move from one end of the composite insulator 1 to the other end, and measure the movement distance of the measuring system 20 and the linear distance from the outer surface of the shed 11 of the composite insulator 1.

[0053] In the above step, before making the measuring system 20 move from one end of the composite insulator 1 to the other end, zero the horizontal distance measuring module 201 and the vertical distance measuring module 202.

[0054] The above steps are specifically as follows: Move the measurement system 20 from one end of the composite insulator 1 to the other end, and measure the moving distance through the horizontal distance measurement module 201, and measure the straight-line distance in the vertical direction through the vertical distance measurement module 202. Deflect the vertical distance measurement module 202 by 10° to 20°, move the measurement system 20 from the other end of the composite insulator 1 to one end, and measure the moving distance through the horizontal distance measurement module 201, and measure the straight-line distance through the vertical distance measurement module 202. That is to say, move the measurement system 20 from the starting position, measure the moving distance through the horizontal distance measurement module 201, and measure the straight-line distance in the vertical direction through the vertical distance measurement module 202 until the measurement system 20 reaches the termination position and stops. Then deflect the vertical distance measurement module 202 by 10° to 20°, move the measurement system 20 from the termination position, measure the moving distance through the horizontal distance measurement module 201, and measure the straight-line distance through the vertical distance measurement module 202 until the measurement system 20 returns to the starting position and stops.

[0055] Step 4: Instruct the data analysis system 21 to draw the creepage path on the outer surface of the shed 11 of the composite insulator 1 based on the moving distance and the straight-line distance measured by the measurement system 20, and calculate the size parameters of the shed 11 of the composite insulator 1 including at least the dry arc distance, the creepage distance, the shed shape parameters, and the distribution trend of the shed thickness.

[0056] The above steps are specifically as follows: Instruct the data analysis system 21 to convert the moving distance and the straight-line distance measured by the measurement system 20 during the round-trip movement into the coordinate points on the outer surface of the shed 11 of the composite insulator 1 based on the algorithm program. Then, based on the coordinate points, draw the creepage path on the outer surface of the shed 11 of the composite insulator 1, and calculate the size parameters of the composite insulator shed such as the dry arc distance, the creepage distance, the shed shape parameters, and the distribution trend of the shed thickness.

[0057] In the attached drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components; in the description of this application, it should be understood that if there are terms such as "upper", "lower", "left", "right", etc. indicating the orientation or positional relationship, they are based on the orientation or positional relationship shown in the attached drawings. This is only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the positional relationship in the attached drawings are only for illustrative purposes and cannot be understood as a limitation of this patent. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to the specific circumstances.

[0058] The above is only a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent replacements, and improvements made within the spirit and principle of this application shall be included within the protection scope of this application.

Claims

1. An automatic measuring device for the size parameters of the shed of a composite insulator, characterized in that, Comprising: A measurement system that can move back and forth along the axis of the composite insulator. The measurement system is used to measure the movement distance of the measurement system along the axis of the composite insulator and the linear distance from the outer surface of the composite insulator's shed; A data analysis system connected to the measurement system. The data analysis system is used to draw the creepage path of the outer surface of the composite insulator's shed based on the movement distance and linear distance measured by the measurement system, and calculate the size parameters of the composite insulator's shed, including at least the dry arc distance, creepage distance, shed shape parameters, and the distribution trend of the shed thickness; And A measurement device bracket for mounting the measurement system; Wherein, the measurement system includes: A moving mechanism located at the top of the measurement system. The moving mechanism is used to enable the measurement system to be slidably mounted on the measurement device bracket along the axis of the composite insulator back and forth; A horizontal distance measurement module located on both sides of the measurement system along the axis of the composite insulator. The horizontal distance measurement module is used to measure the movement distance of the measurement system along the axis of the composite insulator; and A vertical distance measurement module located at the bottom of the measurement system. The vertical distance measurement module is used to measure the linear distance between the measurement system and the outer surface of the composite insulator's shed; The vertical distance measurement module can rotate around the extension direction of the axis of the composite insulator. When the measurement system slides back and forth along the axis of the composite insulator once, during the forward journey, the vertical distance measurement module maintains vertical distance measurement, and during the return journey, the vertical distance measurement module deflects by 10° - 20° for distance measurement, so as to realize the measurement of the linear distance at all positions of a certain creepage path on the outer surface of the composite insulator's shed; The measurement device bracket includes: A guide rail arranged above the composite insulator along the axis of the composite insulator. The guide rail is used for the measurement system to be slidably mounted; and Guide rail brackets, including two. Both of the two guide rail brackets support below the guide rail and are respectively arranged at both ends of the guide rail; Both bottoms of the two guide rail brackets have two feet, and the space between the feet is used to accommodate the end fittings of the composite insulator; Both tops of the two guide rail brackets have supports, and the side surfaces of the supports are used as the irradiation targets for the laser emitted by the horizontal distance measurement module.

2. The automatic measuring device for the size parameters of the umbrella skirt of a composite insulator according to claim 1, characterized in that, The measurement device bracket further includes: Positioning modules, including two. The two positioning modules are respectively installed at both ends of the guide rail. Both of the two positioning modules are used to measure the linear distance between the guide rail and the end of the composite insulator to ensure that the guide rail is parallel to the axis of the composite insulator.

3. An automatic measurement method for the size parameters of the shed of a composite insulator using the automatic measurement device for the size parameters of the shed of a composite insulator according to claim 1 or 2, characterized in that, Including the following steps: Horizontally set the composite insulator; Adjust the measurement device bracket so that the movement trajectory of the measurement system is parallel to the axis of the composite insulator in the same vertical plane; Make the measurement system move from one end of the composite insulator to the other end, and measure the movement distance of the measurement system and the linear distance from the outer surface of the composite insulator's shed; Let the data analysis system draw the creepage path of the outer surface of the composite insulator's shed based on the movement distance and linear distance measured by the measurement system, and calculate the size parameters of the composite insulator's shed, including at least the dry arc distance, creepage distance, shed shape parameters, and the distribution trend of the shed thickness.

4. The automatic measurement method for the size parameters of the shed of a composite insulator according to claim 3, characterized in that adjusting the support of the measuring device so that the movement trajectory of the measuring system is parallel to the axis of the composite insulator in the same vertical plane, including: using the positioning module to adjust the guide rail so that the guide rail is parallel to the axis of the composite insulator in the same vertical plane, and marking the starting position and the ending position of the movement process of the measuring system on the guide rail.

5. The automatic measurement method for the size parameters of the shed of a composite insulator according to claim 3, characterized in that before making the measuring system move from one end of the composite insulator to the other end, zero the horizontal distance measuring module and the vertical distance measuring module.

6. The automatic measurement method for the size parameters of the shed of a composite insulator according to claim 3, characterized in that making the measuring system move from one end of the composite insulator to the other end, and measuring the movement distance of the measuring system and the straight-line distance from the outer surface of the shed of the composite insulator, including: making the measuring system move from one end of the composite insulator to the other end, and measuring the movement distance through the horizontal distance measuring module and measuring the straight-line distance while keeping the vertical direction through the vertical distance measuring module; deflecting the vertical distance measuring module by 10° to 20°, making the measuring system move from the other end of the composite insulator to one end, and measuring the movement distance through the horizontal distance measuring module and measuring the straight-line distance through the vertical distance measuring module.

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