A laser measuring device, measuring method and application thereof in porcelain insulator

Abstract

The application relates to the field of porcelain insulator detection, and discloses a laser measuring device, a measuring method and application of the laser measuring device and the measuring method in porcelain insulators, which comprises a machine body, a plurality of bottom support assemblies are equidistantly arranged on the inner side of the machine body, a rotating driving assembly is arranged above the bottom support assemblies, the bottom support assembly comprises a U-shaped frame, guide blocks are symmetrically arranged on the two sides of the U-shaped frame, two guide support rods are symmetrically and fixedly arranged on the inner side of the machine body, the guide blocks are sleeved and arranged on the outer side of the guide support rods on the corresponding side, two end limiting plates are symmetrically arranged on the U-shaped frame, and the two end limiting plates are symmetrically arranged on the sides, away from each other, of the two U-shaped frames at the end. According to the application, each support box supports each umbrella skirt of the porcelain insulator, when a laser ranging head emits laser to the edge of the umbrella skirt for laser distance measurement, the roundness and coaxiality of the umbrella skirt can be detected, and after the laser ranging head rotates to the horizontal position, the distance between the two adjacent umbrella skirts can be measured.

Description

Technical Field

[0001] This invention belongs to the field of porcelain insulator testing, specifically a laser measuring device, a measuring method, and its application in porcelain insulators. Background Technology

[0002] As a core insulating component in high-voltage transmission lines and substation equipment, the design and dimensional accuracy of porcelain insulator skirts directly determine their insulation performance, creepage distance, and mechanical stability, making them crucial factors for ensuring the safe and stable operation of power systems. The roundness, coaxiality, and spacing between adjacent skirts are core dimensional parameters that decisively influence the working performance of porcelain insulators: excessive roundness deviations lead to uneven surface electric field distribution, easily causing local electric field concentration and increasing the risk of surface discharge; excessive coaxiality results in uneven installation stress, easily leading to mechanical fatigue and breakage during long-term operation; spacing deviations directly affect the effectiveness of creepage distances, impairing the rainproof, anti-fouling, and self-cleaning functions of the skirts, and easily inducing flashover accidents in humid and dirty environments, potentially causing transmission line interruptions and significant economic losses. With the widespread application of laser measurement technology in industrial inspection, some companies have attempted to use general-purpose laser measurement equipment (such as laser rangefinders and laser scanners) for measuring the dimensions of porcelain insulator skirts, but the following shortcomings still exist: Because the detection directions for the roundness, coaxiality, and spacing between adjacent umbrella skirts are different, it is necessary to place them in different devices for separate detection when detecting different features of the umbrella skirts. It is inconvenient to detect all three on the same device, which reduces the detection efficiency. Summary of the Invention

[0003] In view of the above situation and to overcome the defects of the prior art, the present invention provides a laser measurement device, a measurement method and its application in porcelain insulators, which effectively solves the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a laser measuring device, comprising a body, wherein a plurality of bottom support components are equidistantly arranged on the inner side of the body, and a rotation drive component is arranged above the bottom support components; The bottom support assembly includes a U-shaped frame with guide blocks symmetrically installed on both sides of the U-shaped frame. Two guide support rods are symmetrically fixedly installed on the inner side of the body. The guide blocks are sleeved on the outer side of the guide support rods on the corresponding side. Two end limiting plates are symmetrically installed on the U-shaped frame. The two end limiting plates are symmetrically arranged on the two ends of the two U-shaped frames away from each other. Connecting springs are installed between two adjacent guide blocks and between the end guide blocks and the end limiting plates. The U-shaped frame has a support member on its inner side, a second through slot in the middle of the bottom end of the U-shaped frame, and a laser measuring device at the bottom end of the U-shaped frame. The support member is used to support the porcelain insulator, and the laser measuring device is used to detect the coaxiality of the umbrella skirts and to measure the distance between two adjacent umbrella skirts using laser technology.

[0005] Preferably, the support includes a support box disposed inside the U-shaped frame, two support rollers are symmetrically rotatably mounted inside the support box, a first through groove is opened at the bottom end of the support box, the first through groove corresponds to the position of the second through groove, sliders are symmetrically mounted at both ends of the support box, contacts are installed at the ends of the sliders, a support spring is fixedly installed at the bottom end of the sliders, and a storage battery is installed on the support box, with the positive and negative terminals of the storage battery electrically connected to the two contacts respectively.

[0006] Preferably, the U-shaped frame has symmetrical grooves on both side walls, the slider is slidably installed inside the groove, and the bottom end of the supporting spring is fixedly connected to the bottom wall of the groove. A conductive slider is installed on the side wall of the groove, and the conductive slider is located below the contact point.

[0007] Preferably, rotating frames are symmetrically installed on the inner walls of both sides of the support box, wherein the rotating frames are located in the center between the two support rollers, and gears are rotatably installed on the rotating frames. Clamping arms are fixedly installed on the top of the gears, and toothed plates are meshed on the sides of the two gears that are far apart from each other. The toothed plates extend through to the bottom of the support box and are fixedly installed on the inner bottom wall of the U-shaped frame.

[0008] Preferably, the laser measuring component includes a fixed frame fixedly installed at the bottom of the U-shaped frame, a rotating frame rotatably installed on the fixed frame, a laser ranging head fixedly installed on the rotating frame, the laser ranging head being located below the second through slot, one end of the rotating shaft of the rotating frame being fixedly connected to the output shaft of the drive motor, the drive motor being installed on the fixed frame, the laser ranging head and the drive motor being electrically connected between two conductive sliders, the laser ranging head and the drive motor being arranged in parallel, and both being controlled by a separate remote control switch.

[0009] Preferably, the two ends of the U-shaped frame are symmetrically equipped with side plates, and two positioning grooves are symmetrically opened on the side plates.

[0010] Preferably, the rotation drive assembly includes a mounting box and a mounting plate. Two guide shafts are symmetrically rotated between the mounting box and the mounting plate. Two rotation motors are installed inside the mounting box. The output shafts of the two rotation motors are fixedly connected to the ends of the two guide shafts, respectively. Limiting rotating parts are equidistantly arranged on the guide shafts. The limiting rotating parts correspond one-to-one with the bottom support assembly. Two lifting cylinders are installed at the top of the machine body. The output ends of the two lifting cylinders are connected to the mounting box and the mounting plate, respectively.

[0011] Preferably, the limiting rotating component includes two rotating rollers, each with a guide groove coaxially formed on it. Two guide shafts are slidably mounted inside the guide grooves on the two rotating rollers. The rotating rollers are rotatably mounted on the top frame. Two positioning rods are symmetrically mounted on the bottom end of the top frame. The positioning rods are movably mounted inside the positioning grooves on the lower side plate. The two rotating rollers are respectively located above the two support rollers inside the corresponding support boxes.

[0012] Preferably, a measurement method for a laser measuring device is as follows: S1. Porcelain insulator installation: Install the porcelain insulator onto the corresponding support box according to the position of the shed, so that the shed contacts the two support rollers; S2, Clamping and Connecting: After placement, under pressure, the support box moves downward, which drives the two clamping arms to move closer to each other and rotate, thus centering and holding the umbrella skirt in place. In addition, it makes the contacts come into contact with the conductive slider to achieve power connection. S3, Top Limit: The rotating drive assembly is moved downward by the lifting cylinder so that the two rotating rollers contact the top of the umbrella skirt to achieve the limit; S4. Roundness and coaxiality detection: The laser rangefinder is turned on to measure the distance between the laser rangefinder and the bottom edge of the umbrella skirt, and drives the porcelain insulator to rotate, drawing a distance curve to reflect the roundness and coaxiality of the umbrella skirt. S5. Umbrella Skirt Spacing Measurement: The laser ranging head is driven by a drive motor to rotate, enabling it to emit laser light horizontally. The distance between two adjacent laser ranging heads is detected, thereby measuring the spacing between the porcelain insulator's umbrella skirts.

[0013] Preferably, a laser measuring device and method are applied to porcelain insulators, wherein the porcelain insulators are suspension porcelain insulators, post porcelain insulators, or rod-shaped porcelain insulators, and the detection directions are skirt roundness detection, coaxiality detection, and skirt spacing detection.

[0014] Compared with the prior art, the beneficial effects of the present invention are: (1) In this invention, each support box supports each skirt on the porcelain insulator. When the laser ranging head emits a laser upward to measure the laser distance to the edge of the skirt, the roundness and coaxiality of the skirt can be detected. After the laser ranging head is rotated to the horizontal, the distance between two adjacent skirts can be measured by laser ranging with an adjacent laser ranging head, thereby improving the detection efficiency. (2) In this invention, multiple U-shaped frames are slidably installed on the guide support rod, so that each support box supports each skirt on the porcelain insulator and corresponding limit rotating parts are set so that the two support rollers and two rotating rollers limit the skirts, improve the detection stability, and drive the rotating rollers to rotate so that the porcelain insulator can rotate, which facilitates the detection of the roundness and coaxiality of the skirts. (3) In this invention, after the umbrella skirt exerts pressure on the two support rollers, it pushes the support box to move downward and causes relative displacement with the toothed plate. The toothed plate meshes with the gear, thereby driving the two clamping arms to move closer to each other and rotate, so that the umbrella skirt is centered in the support box, improving the accuracy of umbrella skirt roundness and coaxiality detection and laser measurement of the distance between two adjacent umbrella skirts. (4) In this invention, after the porcelain insulator is installed on multiple support boxes, the support boxes are pressed down to move downwards, so that the contacts come into contact with the conductive sliders, so that the laser rangefinder and the drive motor on the corresponding support are connected to the battery circuit on the support box, which facilitates the electrical control of the laser rangefinder and the drive motor to be used, and is convenient to use. Attached Figure Description

[0015] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof.

[0016] In the attached diagram: Figure 1 This is a schematic diagram of the laser measurement device of the present invention; Figure 2 This is a schematic diagram of the rotation drive assembly structure of the present invention; Figure 3 This is a schematic diagram of the limiting rotation component structure of the present invention; Figure 4 This is a schematic diagram of the bottom support component structure of the present invention; Figure 5 This is a schematic diagram of the U-shaped frame of the present invention installed inside the support box; Figure 6 This is a schematic diagram of the U-shaped frame structure of the present invention; Figure 7 This is a schematic diagram of the connection structure between the U-shaped frame and the support box of the present invention; Figure 8 This is a schematic diagram of the clamping arm structure of the present invention; In the diagram: 1. Body; 2. Bottom support assembly; 201. U-shaped frame; 202. Guide block; 203. Guide support rod; 204. End limiting plate; 205. Connecting spring; 206. Side plate; 207. Positioning groove; 208. Slide groove; 209. Conductive slide bar; 210. Support component; 2101. Support box; 2102. Slider; 2103. Support spring; 2104. Contact point; 2105. Support roller; 2106. First through groove; 2107. Turning frame; 210 8. Gear; 2109. Clamping arm; 211. Second through slot; 212. Laser measuring component; 2121. Fixing frame; 2122. Rotating frame; 2123. Laser rangefinder head; 2124. Drive motor; 213. Gear plate; 3. Rotation drive assembly; 301. Mounting box; 302. Mounting plate; 303. Guide shaft; 304. Limiting rotating component; 3041. Top frame; 3042. Positioning rod; 3043. Rotating roller; 3044. Guide slot; 4. Lifting cylinder. Detailed Implementation

[0017] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0018] Example 1, by Figure 1 The present invention relates to a laser measuring device, comprising a body 1, wherein a plurality of bottom support components 2 are equidistantly arranged on the inner side of the body 1, and a rotation drive component 3 is arranged above the bottom support components 2.

[0019] Depend on Figures 4-6The bottom support assembly 2 includes a U-shaped frame 201. Guide blocks 202 are symmetrically installed on both sides of the U-shaped frame 201. Two guide support rods 203 are symmetrically fixedly installed on the inner side of the body 1. The guide blocks 202 are sleeved on the outer side of the guide support rod 203 on the corresponding side. Two end limiting plates 204 are symmetrically installed on the U-shaped frame 201. The two end limiting plates 204 are symmetrically arranged on the side of the two U-shaped frames 201 that are far apart from each other. The guide blocks 202 are positioned between adjacent guide blocks 202 and between the end guide blocks 202 and the end limiting plates. Connecting springs 205 are installed between each of the 204. A support member 210 is provided on the inner side of the U-shaped frame 201. A second through groove 211 is opened in the middle of the bottom end of the U-shaped frame 201. A laser measuring member 212 is provided at the bottom end of the U-shaped frame 201. The support member 210 is used to support the porcelain insulator. The laser measuring member 212 is used to detect the coaxiality of the umbrella skirt and to perform laser measurement on the distance between two adjacent umbrella skirts. Side plates 206 are symmetrically installed at both ends of the U-shaped frame 201. Two positioning grooves 207 are symmetrically opened on the side plates 206.

[0020] Depend on Figures 7-8 The support member 210 includes a support box 2101 disposed inside the U-shaped frame 201. Two support rollers 2105 are symmetrically rotatably mounted inside the support box 2101. A first through groove 2106 is formed at the bottom of the support box 2101, corresponding to a second through groove 211. Slider blocks 2102 are symmetrically mounted at both ends of the support box 2101. Contact points 2104 are mounted at the ends of the sliders 2102. A support spring 2103 is fixedly mounted at the bottom of the sliders 2102. A battery is mounted on the support box 2101, with its positive and negative terminals electrically connected to the two contacts 2104, respectively. Sliding grooves 208 are symmetrically formed on the side walls of the U-shaped frame 201. The sliders 2102 are slidably mounted inside the sliding grooves 208, and the bottom ends of the support springs 2103 are fixedly connected to the bottom wall of the sliding grooves 208. Conductive sliders 209 are mounted on the side walls of the sliding grooves 208. Below the contact point 2104, symmetrical rotating frames 2107 are installed on the inner walls of both sides of the support box 2101. The rotating frames 2107 are positioned in the center between the two support rollers 2105. A gear 2108 is rotatably mounted on the rotating frames 2107. A clamping arm 2109 is fixedly mounted on the top of the gear 2108. A toothed plate 213 is meshed with the two gears 2108 on the opposite sides. The toothed plate 213 extends through the support box 2101 and is fixedly mounted on the inner bottom wall of the U-shaped frame 201. After the umbrella skirt exerts pressure on the two support rollers 2105, it pushes the support box 2101 to move downward, causing relative displacement with the toothed plate 213. The toothed plate 213 meshes with the gear 2108, thereby driving the two clamping arms 2109 to move closer to each other and rotate, so that the umbrella skirt is centered in the support box 2101, improving the accuracy of umbrella skirt roundness and coaxiality detection, as well as laser measurement of the distance between two adjacent umbrella skirts.

[0021] Depend on Figure 7 The laser measuring component 212 includes a fixed frame 2121 fixedly mounted on the bottom end of the U-shaped frame 201. A rotating frame 2122 is rotatably mounted on the fixed frame 2121, and a laser ranging head 2123 is fixedly mounted on the rotating frame 2122. The laser ranging head 2123 is located below the second through slot 211. One end of the rotating shaft of the rotating frame 2122 is fixedly connected to the output shaft of the drive motor 2124. The drive motor 2124 is mounted on the fixed frame 2121. The laser ranging head 2123 and the drive motor 2124 are electrically connected between two conductive sliders 209. After the porcelain insulator is installed on multiple support boxes 2101, pressing the support box 2101 moves downward, causing the contact point 2104 to contact the conductive slider 209, so that the corresponding support component 212... The laser rangefinder 2123 and drive motor 2124 on the 10 are connected to the battery circuit on the support box 2101, which facilitates the electrical control of the laser rangefinder 2123 and drive motor 2124 as needed, making it convenient to use. The laser rangefinder 2123 and drive motor 2124 are set in parallel and controlled by a separate remote control switch. Each support box 2101 supports each umbrella skirt on the porcelain insulator. When the laser rangefinder 2123 emits a laser upward to measure the laser distance to the edge of the umbrella skirt, it can detect the roundness and coaxiality of the umbrella skirt. After the laser rangefinder 2123 is rotated to the horizontal, it measures the distance between two adjacent umbrella skirts by laser ranging with an adjacent laser rangefinder 2123, which is convenient to use.

[0022] Depend on Figures 2-3 The rotating drive assembly 3 includes a mounting box 301 and a mounting plate 302. Two guide shafts 303 are symmetrically rotatably mounted between the mounting box 301 and the mounting plate 302. Two rotating motors are installed inside the mounting box 301. The output shafts of the two rotating motors are fixedly connected to the ends of the two guide shafts 303 respectively. Limiting rotating parts 304 are equidistantly arranged on the guide shafts 303. The limiting rotating parts 304 correspond one-to-one with the bottom support assembly 2. Two lifting cylinders 4 are installed at the top of the body 1. The output ends of the two lifting cylinders 4 are connected to the mounting box 301 and the mounting plate 302 respectively.

[0023] The limiting rotating component 304 includes two rotating rollers 3043, each with a coaxial guide groove 3044. Two guide shafts 303 are slidably mounted inside the guide grooves 3044 on the two rotating rollers 3043. The rotating rollers 3043 are rotatably mounted on the top frame 3041. Two positioning rods 3042 are symmetrically mounted on the bottom end of the top frame 3041. The positioning rods 3042 are movably mounted inside the positioning grooves 207 on the lower side plate 206. The two rotating rollers 3043 are... Above the two support rollers 2105 located inside the corresponding support box 2101, multiple U-shaped frames 201 are slidably installed on the guide support rod 203, so that each support box 2101 supports each skirt on the porcelain insulator. A limiting rotating part 304 is set accordingly, so that the two support rollers 2105 and the two rotating rollers 3043 limit the skirt, improve the detection stability, and drive the rotating rollers 3043 to rotate, which can drive the porcelain insulator to rotate, making it convenient to detect the roundness and coaxiality of the skirt.

[0024] Working principle: When in use, the porcelain insulator to be tested is installed according to the correspondence between its umbrella skirt and support box 2101. The umbrella skirt is placed in one of the support boxes 2101, and the adjacent umbrella skirt is placed in the adjacent support box 2101, so that the two support rollers 2105 in the support box 2101 support the bottom of the umbrella skirt. After the porcelain insulator is placed, the weight of the porcelain insulator exerts a downward pressure on the support box 2101: First, under pressure, the support box 2101 moves downward, causing the contact point 2104 at the end of the slider 2102 to contact the conductive slider 209, thereby connecting the laser rangefinder 2123 and the drive motor 2124 to the battery circuit on the corresponding support box 2101, which facilitates circuit control of the laser rangefinder 2123 and the drive motor 2124 supported by the umbrella skirt. In addition, the support box 2101 moves downward after being pressed, and the gear 2108 meshes with the toothed plate 213 fixed on the U-shaped frame 201. After the support box 2101 moves downward, under the action of the toothed plate 213, the two clamping arms 2109 move closer to each other and rotate to center and clamp the umbrella skirt, so that the umbrella skirt is located in the middle of the inner side of the support box 2101. The coaxiality of the umbrella skirt and the distance between two adjacent umbrella skirts are measured by laser to ensure accuracy. Then, the lifting cylinder 4 is activated, driving the rotating drive assembly 3 to move downward. During the centering adjustment of the umbrella skirt, since the positioning rod 3042 at the bottom of the top frame 3041 is slidably installed in the positioning groove 207 on the side plate 206, when the adjacent two U-shaped frames 201 adjust the spacing according to the spacing of the umbrella skirt on the porcelain insulator, the adjacent two limiting rotating parts 304 adjust the spacing synchronously. Under the drive of the lifting cylinder 4, the rotating roller 3043 moves downward and presses against the top of the umbrella skirt of the porcelain insulator, so that the two support rollers 2105 and the two rotating rollers 3043 limit the umbrella skirt. The laser rangefinder 2123 is remotely controlled to be turned on, so that the laser rangefinder 2123 emits laser upward from the second through slot 211 and the first through slot 2106 until it reaches the edge of the umbrella skirt. The distance A from the edge of the umbrella skirt is detected. Then, the rotating motor in the mounting box 301 is turned on, driving the guide shaft 303 to rotate, which in turn drives the rotating roller 3043 to rotate. Under the action of friction, the porcelain insulator rotates. During the rotation of the porcelain insulator, the distance from each laser rangefinder 2123 to the insulator of the corresponding umbrella skirt is detected and the distance curve is plotted. If the umbrella skirt is qualified, the umbrella skirt needs to have a circular cross section and each umbrella skirt needs to be coaxial. At this time, the distance curve corresponding to each umbrella skirt is observed. If the distance curve is a horizontal straight line, it means that the roundness and coaxiality of the umbrella skirt are qualified. In addition, it is possible to observe whether the diameter of each umbrella skirt is the same or whether the diameter of adjacent umbrella skirts changes in a regular manner based on the distance curve. After the test is completed, the drive motor 2124 is turned on by remote control of the drive motor 2124, which drives each rotating frame 2122 to rotate 90 degrees in the same direction. This causes the laser rangefinder 2123 to emit a laser horizontally toward one side of the rotating frame 2122, and the distance between the laser rangefinder 2123 and the adjacent rotating frame 2122 is measured by laser. The result is B. The distance between the emission end of the laser rangefinder 2123 and the bottom wall of the corresponding rotating frame 2122 is a constant value C. The distance between two adjacent umbrella skirts can then be calculated using B + C, which facilitates the measurement of the distance between two adjacent umbrella skirts.

[0025] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0026] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A laser measuring device, comprising a body (1), characterized in that: Multiple bottom support components (2) are equidistantly arranged on the inner side of the body (1), and a rotation drive component (3) is arranged above the bottom support components (2). The bottom support assembly (2) includes a U-shaped frame (201), with guide blocks (202) symmetrically installed on both sides of the U-shaped frame (201). Two guide support rods (203) are symmetrically fixedly installed on the inner side of the body (1). The guide blocks (202) are sleeved and installed on the outer side of the guide support rods (203) on the corresponding side. Two end limiting plates (204) are symmetrically installed on the U-shaped frame (201). The two end limiting plates (204) are symmetrically arranged on the side away from each other of the two U-shaped frames (201) at the ends. Connecting springs (205) are installed between two adjacent guide blocks (202) and between the end guide blocks (202) and the end limiting plates (204). A support member (210) is provided on the inner side of the U-shaped frame (201). A second through groove (211) is opened in the middle of the bottom end of the U-shaped frame (201). A laser measuring element (212) is provided at the bottom end of the U-shaped frame (201). The support member (210) is used to support the porcelain insulator. The laser measuring element (212) is used to detect the coaxiality of the umbrella skirts and to perform laser measurement on the distance between two adjacent umbrella skirts. The support member (210) includes a support box (2101) provided on the inner side of the U-shaped frame (201). Two support rollers (2105) are symmetrically rotated and installed inside the support box (2101). A first through groove (2106) is opened at the bottom end of the support box (2101). The positions of the first through groove (2106) and the second through groove (211) are... Correspondingly, sliders (2102) are symmetrically installed at both ends of the support box (2101), and contacts (2104) are installed at the ends of the sliders (2102). A support spring (2103) is fixedly installed at the bottom end of the sliders (2102). A battery is installed on the support box (2101), and the positive and negative terminals of the battery are electrically connected to the two contacts (2104) respectively. Slide grooves (208) are symmetrically opened on the two side walls of the U-shaped frame (201). The sliders (2102) are slidably installed inside the slide grooves (208), and the bottom end of the support spring (2103) is fixedly connected to the bottom wall of the slide groove (208). A conductive slider (209) is installed on the side wall of the slide groove (208), and the conductive slider (209) is located below the contacts (2104).

2. The laser measuring device according to claim 1, characterized in that: The support box (2101) is symmetrically equipped with rotating frames (2107) on both inner walls. The rotating frames (2107) are located in the middle between the two support rollers (2105). Gears (2108) are rotatably mounted on the rotating frames (2107). A clamping arm (2109) is fixedly mounted on the top of the gears (2108). The two gears (2108) are meshed with toothed plates (213) on the sides away from each other. The toothed plates (213) extend through to the bottom of the support box (2101) and are fixedly mounted on the inner bottom wall of the U-shaped frame (201).

3. The laser measuring device according to claim 2, characterized in that: The laser measuring component (212) includes a fixed frame (2121) fixedly installed at the bottom of the U-shaped frame (201), a rotating frame (2122) rotatably installed on the fixed frame (2121), a laser ranging head (2123) fixedly installed on the rotating frame (2122), the laser ranging head (2123) being located below the second through slot (211), one end of the rotating shaft of the rotating frame (2122) being fixedly connected to the output shaft of the drive motor (2124), the drive motor (2124) being installed on the fixed frame (2121), the laser ranging head (2123) and the drive motor (2124) being electrically connected between two conductive sliders (209), the laser ranging head (2123) and the drive motor (2124) being arranged in parallel, and both being controlled by a separate remote control switch.

4. The laser measuring device according to claim 3, characterized in that: The U-shaped frame (201) has side plates (206) symmetrically installed at both ends, and two positioning grooves (207) are symmetrically opened on the side plates (206).

5. A laser measuring device according to claim 4, characterized in that: The rotation drive assembly (3) includes a mounting box (301) and a mounting plate (302). Two guide shafts (303) are symmetrically rotated between the mounting box (301) and the mounting plate (302). Two rotating motors are installed inside the mounting box (301). The output shafts of the two rotating motors are fixedly connected to the ends of the two guide shafts (303). Limiting rotating parts (304) are equidistantly arranged on the guide shafts (303). The limiting rotating parts (304) correspond one-to-one with the bottom support assembly (2). Two lifting cylinders (4) are installed at the top of the body (1). The output ends of the two lifting cylinders (4) are connected to the mounting box (301) and the mounting plate (302) respectively.

6. A laser measuring device according to claim 5, characterized in that: The limiting rotating component (304) includes two rotating rollers (3043), and a guide groove (3044) is coaxially provided on the rotating rollers (3043). Two guide shafts (303) are closed and slidably installed inside the guide grooves (3044) on the two rotating rollers (3043). The rotating rollers (3043) are rotatably installed on the top frame (3041). Two positioning rods (3042) are symmetrically installed at the bottom end of the top frame (3041). The positioning rods (3042) are movably installed inside the positioning grooves (207) on the lower side plate (206). The two rotating rollers (3043) are respectively located above the two support rollers (2105) inside the corresponding support box (2101).

7. The measurement method of a laser measuring device according to claim 6, characterized in that, The measurement method is as follows: S1. Porcelain insulator installation: Install the porcelain insulator onto the corresponding support box (2101) according to the position of the umbrella skirt, so that the umbrella skirt contacts the two support rollers (2105); S2, clamping and connecting: After placement, under pressure, the support box (2101) moves downward, driving the two clamping arms (2109) to move closer to each other and rotate, thus centering and holding the umbrella skirt, and also making the contact point (2104) contact the conductive slider (209) to achieve connection; S3, Top Limit: The lifting cylinder (4) drives the rotating drive assembly (3) to move downward, so that the two rotating rollers (3043) contact the top of the umbrella skirt to achieve the limit; S4. Roundness and coaxiality detection: The laser rangefinder (2123) is turned on to measure the distance between the laser rangefinder (2123) and the bottom edge of the umbrella skirt, and drives the porcelain insulator to rotate to draw a distance curve, reflecting the roundness and coaxiality of the umbrella skirt; S5. Measurement of the distance between the umbrella skirts: The laser ranging head (2123) is driven to rotate by the drive motor (2124) so ​​that it can emit laser light horizontally to detect the distance between two adjacent laser ranging heads (2123) and thus measure the distance between the umbrella skirts of the porcelain insulator.

8. The application of a laser measuring device according to claim 6 in porcelain insulators, characterized in that, The porcelain insulator is a suspension porcelain insulator, a post porcelain insulator, or a rod-shaped porcelain insulator. The detection directions are skirt roundness detection, coaxiality detection, and skirt spacing detection.

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