Auxiliary device for measuring flatness of wind power tower

Abstract

The embodiment of the invention provides an auxiliary device for measuring the flatness of a wind power tower. The auxiliary measurement device comprises a first ladder stand, a second ladder stand and a standing platform, one end of the first crawling ladder is rotationally connected with one end of the standing platform; one end of the second ladder is rotationally connected with one end, away from the first ladder, of the standing platform; when the crawling face of the first crawling ladder is connected with the standing face of the standing platform at a preset angle and the crawling face of the second crawling ladder is connected with the standing face of the standing platform at a preset angle, the first crawling ladder and the second crawling ladder are symmetrical, and the end, away from the standing platform, of the first crawling ladder and the end, away from the standing platform, of the second crawling ladder are arranged on the ground. The standing surface is parallel to the ground, and the standing surface is lifted to a preset height by the first crawling ladder and the second crawling ladder. The device is used for achieving the technical effect of improving the flatness measurement efficiency.

Description

Technical Field

[0001] The present application relates to the technical field of wind turbine tower flatness measurement, and in particular to a wind turbine tower flatness measurement auxiliary device. Background Art

[0002] With the continuous advancement of wind power technology, the diameter of wind turbine towers has shown a trend of increasing in recent years to improve the efficiency and power of wind power generation. While this increase in diameter has positive implications for improving power generation efficiency, it also brings a series of new challenges to tower manufacturing. Measuring the flatness of tower flanges has become significantly more difficult.

[0003] After the wind turbine tower is girth-welded, accurately measuring the flatness of the tower flange becomes more complex. Existing measurement aids are generally suitable for smaller-diameter towers. For larger-diameter towers, measurement points are more numerous and more widely distributed. However, existing measurement aids have a limited coverage area, requiring multiple movements when measuring large-diameter towers, resulting in low measurement efficiency. Summary of the Invention

[0004] The embodiment of the present application provides a wind turbine tower flatness measurement auxiliary device to achieve the technical effect of improving measurement efficiency.

[0005] The embodiment of the present application provides a wind turbine tower flatness measurement auxiliary device, comprising: a first ladder, a second ladder and a standing platform;

[0006] One end of the first ladder is rotatably connected to one end of the standing platform; one end of the second ladder is rotatably connected to the end of the standing platform away from the first ladder;

[0007] When the crawling surface of the first ladder is connected to the standing surface of the standing platform at a preset angle, and the crawling surface of the second ladder is connected to the standing surface of the standing platform at a preset angle, the first ladder and the second ladder are mirror-symmetrical, and the end of the first ladder away from the standing platform and the end of the second ladder away from the standing platform are set on the ground, the standing surface is parallel to the ground, and the standing surface is lifted to a preset height by the first ladder and the second ladder.

[0008] In a possible embodiment, a buckle assembly is provided at one end of the first ladder connected to the standing platform and at one end of the second ladder connected to the standing platform. The buckle assembly is used to limit the relative rotation angle of the crawling surface of the first ladder and the standing surface of the standing platform to no more than a preset angle, and the relative rotation angle of the crawling surface of the second ladder and the standing surface of the standing platform to no more than a preset angle.

[0009] In one possible embodiment, when the crawling surface of the first ladder is connected to the standing surface of the standing platform at a preset angle, and the crawling surface of the second ladder is connected to the standing surface of the standing platform at a preset angle, a stabilizing component is provided between a side of the first ladder facing away from the crawling surface and a side of the second ladder facing away from the crawling surface.

[0010] In a possible embodiment, the measurement auxiliary device further includes a bottom frame;

[0011] One end of the bottom frame away from the ground is detachably connected to one end of the first ladder away from the standing platform and one end of the second ladder away from the standing platform.

[0012] In a possible embodiment, at least one pulley block is provided at one end of the bottom frame close to the ground.

[0013] In one possible embodiment, the measurement auxiliary device further includes a lifting component;

[0014] The lifting assembly is arranged at one end of the bottom frame close to the ground, and the lifting assembly is used to lift the bottom frame.

[0015] In a possible implementation, guardrails are provided on both sides of the first ladder, the second ladder, and the standing platform.

[0016] In a possible implementation, the standing platform is a multi-section nested retractable structure.

[0017] In a possible implementation, the footrests of the first ladder and the second ladder are provided with rubber anti-slip pads.

[0018] In a possible embodiment, the standing surface is provided with uneven anti-slip textures.

[0019] An embodiment of the present application provides a wind turbine tower flatness measurement assistance device, comprising a first ladder, a second ladder, and a standing platform. The device can be opened to a preset angle based on the diameter of the wind turbine tower, so that the first and second ladders are mirror-symmetrical, and the standing platform's standing surface is raised to a preset height by the first and second ladders. By conveniently measuring the flatness of multiple measurement points at different locations on the wind turbine tower along a path between the first ladder, the standing platform, and the second ladder, or the second ladder, the standing platform, and the first ladder, it is possible to avoid multiple deployments of the measurement assistance device and improve measurement efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0021] Figure 1This is a schematic diagram of the structure of a wind turbine tower flatness measurement auxiliary device provided in this application.

[0022] Reference numerals:

[0023] 1: First ladder; 2: Second ladder; 3: Standing platform; 4: Guardrail; 5: Bottom frame; 6: Pulley block.

[0024] The above drawings illustrate specific embodiments of the present application, which will be described in more detail below. These drawings and the textual description are not intended to limit the scope of the present application in any way, but rather to illustrate the concepts of the present application to those skilled in the art by reference to specific embodiments. DETAILED DESCRIPTION

[0025] Exemplary embodiments will be described in detail herein, with examples illustrated in the accompanying drawings. In the following description, when referring to the drawings, identical numerals in different figures represent identical or similar elements, unless otherwise indicated. The embodiments described in the following exemplary embodiments are not intended to represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present application, as detailed in the appended claims.

[0026] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "connected" and "connection" should be understood in a broad sense. For example, it can refer to a fixed connection, an indirect connection through an intermediate medium, internal communication between two components, or an interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0027] In the description of this application, it should be understood that the terms "upper", "front", "horizontal", "bottom", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on this application.

[0028] The terms "first" and "second" in the specification and claims of this application and the accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this manner are interchangeable where appropriate, such that the embodiments of the application described herein can, for example, be implemented in an order other than that illustrated or described herein.

[0029] In addition, the terms "comprise," "comprises," and any variations thereof, are intended to cover non-exclusive inclusions; for example, a process, method, system, product, or service tool that includes a series of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, product, or service tool.

[0030] As mentioned in the background, with the continuous innovation of wind power technology, the diameter of wind turbine towers has continued to increase. This change has significantly improved wind power generation efficiency and power. However, it has also created many new challenges in the tower manufacturing process. Among them, the increasing difficulty in measuring tower flange flatness is a problem that cannot be ignored.

[0031] Existing measurement aids are mostly designed and manufactured for measuring smaller-diameter towers. Larger-diameter wind turbine towers require significantly more points on the flange due to their sheer size, and these points are also distributed more widely across the flange surface. However, existing measurement aids only cover a very limited area.

[0032] Specifically, when used to measure large-diameter towers, due to its small coverage, the tooling must be moved multiple times to complete the measurement of all measurement points. This method of moving the tooling multiple times is not only cumbersome, but also requires repositioning and recalibration each time the tooling is moved, which reduces the efficiency of the measurement. For example, when measuring a tower with a smaller diameter, it may only be necessary to measure at a few fixed positions to obtain more comprehensive and accurate data, and the measurement auxiliary tooling can complete the task quickly. However, when facing a large-diameter tower, it may be necessary to measure at dozens or even hundreds of measurement points. The existing measurement auxiliary tooling may only be able to cover a small part of the measurement points at one time, and it needs to be constantly moved around the tower, affecting the efficiency of the entire tower flatness measurement.

[0033] To address the aforementioned issues, the present application provides a wind turbine tower flatness measurement assistance device, comprising a first ladder, a second ladder, and a standing platform. The device can be opened to a preset angle based on the diameter of the wind turbine tower, so that the first and second ladders are mirror-symmetrical, and the standing platform's standing surface is raised to a preset height by the first and second ladders. By conveniently measuring the flatness of multiple measurement points at different locations on the wind turbine tower along the path of the first ladder, the standing platform, and the second ladder, or the path of the second ladder, the standing platform, and the first ladder, multiple pushes of the measurement assistance device can be avoided, thereby improving measurement efficiency.

[0034] The following specific embodiments describe in detail the technical solution of the present application and how the technical solution of the present application solves the above-mentioned technical problems. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The embodiments of the present application will be described below in conjunction with the accompanying drawings.

[0035] Figure 1 A schematic diagram of a wind turbine tower flatness measurement auxiliary device provided in an embodiment of the present application is shown in FIG. Figure 1 As shown, an auxiliary device for measuring the flatness of a wind turbine tower provided by an embodiment of the present application includes: a first ladder 1, a second ladder 2 and a standing platform 3; one end of the first ladder 1 is rotatably connected to one end of the standing platform 3; one end of the second ladder 2 is rotatably connected to an end of the standing platform 3 away from the first ladder 1; when the crawling surface of the first ladder 1 is connected to the standing surface of the standing platform 3 at a preset angle, and the crawling surface of the second ladder 2 is connected to the standing surface of the standing platform 3 at a preset angle, the first ladder 1 and the second ladder 2 are mirror-symmetrical, and the end of the first ladder 1 away from the standing platform 3 and the end of the second ladder 2 away from the standing platform 3 are set on the ground, the standing surface is parallel to the ground, and the standing surface is lifted to a preset height by the first ladder 1 and the second ladder 2.

[0036] In one possible implementation, the rotational connection can be, for example, a hinge connection. Specifically, one end of the first ladder 1 is hingedly connected to one end of the standing platform 3, and one end of the second ladder 2 is hingedly connected to the end of the standing platform 3 away from the first ladder 1. Taking the hinged connection between one end of the first ladder 1 and one end of the standing platform 3 as an example: one end of the first ladder 1 is connected to one end of the standing platform 3 by a metal hinge. The metal hinge includes two hinge plates and a metal shaft, one end of the two hinge plates is fixedly connected to one end of the first ladder 1 and one end of the standing platform 3 respectively, and the port at the other end is rotatably connected to the metal shaft. This connection method can achieve relative rotation, and the first ladder 1 or the second ladder 2 can open and close relative to the standing platform 3 around the metal shaft of the hinge.

[0037] In summary, during use, the measurement assistant first places the measurement auxiliary device in front of the wind turbine tower to be measured. Based on the diameter of the wind turbine tower, the measurement auxiliary device is opened to a preset angle. At this point, the first ladder 1 and the second ladder 2 are mirror-symmetrical, and the standing surface of the standing platform 3 is raised to a preset height by the first ladder 1 and the second ladder 2. After the measurement auxiliary device is placed, the measurement assistant climbs along the path of the first ladder 1, the standing platform 3, the second ladder 2, or the second ladder 2, the standing platform 3, the first ladder 1. During the climbing process, the flatness of the point to be measured at the flange position of the wind turbine tower is measured.

[0038] It should be noted that the preset angle needs to ensure that the contact points of the first ladder 1 and the second ladder 2 on the ground can provide sufficient support to prevent the structure from tipping over.

[0039] Since the first ladder 1 and the second ladder 2 are symmetrically arranged, the surveyor can conveniently perform flatness measurement on multiple measurement points at different positions of the wind turbine tower on the standing platform 3, avoiding multiple pushing of the measurement auxiliary device and improving measurement efficiency.

[0040] Optionally, a snap assembly is provided at one end of the first ladder 1 connected to the standing platform 3 and at one end of the second ladder 2 connected to the standing platform 3, and the snap assembly is used to limit the relative rotation angle of the crawling surface of the first ladder 1 and the standing surface of the standing platform 3 to not exceed a preset angle, and the relative rotation angle of the crawling surface of the second ladder 2 and the standing surface of the standing platform 3 to not exceed a preset angle.

[0041] In this embodiment, a rotational connection exists between the crawling surface of the first ladder 1 and the standing surface of the standing platform 3, and between the crawling surface of the second ladder 2 and the standing surface of the standing platform 3. During normal use, to prevent the movement of the measurement personnel or the action of external forces, relative rotation may occur between the crawling surface and the standing surface. Therefore, to further increase the stability of the measurement auxiliary device, a snap assembly is provided at one end of the first ladder 1 connected to the standing platform 3 and at one end of the second ladder 2 connected to the standing platform 3. The snap assembly is capable of relatively locking the first ladder 1 and the standing platform 3, or the second ladder 2 and the standing platform 3, when the relative rotation angle between the crawling surface of the first ladder 1 and the standing surface of the standing platform 3 reaches a preset angle, and the relative rotation angle between the crawling surface of the second ladder 2 and the standing surface of the standing platform 3 reaches a preset angle.

[0042] In one possible implementation, when the measurement assistance device is no longer needed, the surveyor can loosen the buckle assembly, rotate the first ladder 1 about the metal axis of the hinge to fold the first ladder 1 and the standing platform 3, and rotate the second ladder 2 about the metal axis of the hinge to fold the second ladder 2 and the standing platform 3. This reduces the footprint of the measurement assistance device and improves its convenience and flexibility.

[0043] In one possible implementation, if the rotating connection is a hinged connection, the snap assembly utilizes a spring pin for locking, based on the metal hinge connection. Specifically, corresponding locations for the spring pin and the pre-set hole are provided on the two pieces of the metal hinge. The spring pin is installed on the hinge piece at one end of the first ladder 1, and the pre-set hole is provided on the hinge piece at one end of the standing platform 3. It should be noted that the installation position must ensure that the spring pin can accurately align with the pre-set hole during the rotation of the first ladder 1.

[0044] Optionally, when the crawling surface of the first ladder 1 is connected to the standing surface of the standing platform 3 at a preset angle, and the crawling surface of the second ladder 2 is connected to the standing surface of the standing platform 3 at a preset angle, a stabilizing component is provided between the side of the first ladder 1 facing away from the crawling surface and the side of the second ladder 2 facing away from the crawling surface.

[0045] In this embodiment, when the climbing surface of the first ladder 1 is connected to the standing surface of the standing platform 3 at a preset angle, and the climbing surface of the second ladder 2 is connected to the standing surface of the standing platform 3 at a preset angle, the stabilizing component disposed between the side of the first ladder 1 facing away from the climbing surface and the side of the second ladder 2 facing away from the climbing surface can be, for example, a rigid rod made of a metal material (such as an aluminum alloy or steel pipe). The ends of the rigid rod are connected to the side of the first ladder 1 facing away from the climbing surface and the side of the second ladder 2 facing away from the climbing surface, respectively, via connecting devices (such as flanges with bolts and nuts, or a special clamp). For example, a truss structure can also be used, wherein the truss structure is composed of multiple rods connected by welding or bolts. The truss shape can be a stable structure such as a triangle or trapezoid, with its ends connected to the sides of the first ladder 1 and the second ladder 2 facing away from the climbing surface.

[0046] Optionally, the measurement auxiliary device further includes a bottom frame 5 , the end of which is away from the ground is detachably connected to the end of the first ladder 1 away from the standing platform 3 and the end of the second ladder 2 away from the standing platform 3 .

[0047] In this embodiment, the detachable connection method can be, for example, a bolted connection. Bolts and nuts are used to connect the bottom frame 5 to the first and second ladders 1 and 2, providing a secure fixation while allowing the surveyor to easily disassemble them when needed. The bottom frame 5 provides additional support to enhance the stability of the measurement aid device and effectively prevents the ladders from sliding during use by increasing their contact area with the ground.

[0048] Optionally, at least one pulley set 6 is provided at one end of the bottom frame 5 close to the ground.

[0049] In this embodiment, the pulley block 6 can convert the sliding friction between the bottom frame 5 and the ground into rolling friction. The friction force of rolling friction is much smaller than that of sliding friction. When the measurement auxiliary device needs to be moved, only a small force needs to be applied to move the bottom frame 5. For example, in a flat outdoor venue, if the position of the measurement auxiliary device needs to be adjusted, it can be easily pushed to the desired position using the pulley block 6 without consuming a large amount of manpower to move the entire device. The pulley block 6 can be, for example, a universal wheel. It should be noted that when pushed to the desired position, the pulley block 6 can be locked to prevent the measurement auxiliary device from sliding due to external force or uneven ground during use.

[0050] Optionally, the measurement auxiliary device further includes a lifting assembly, which is arranged at one end of the bottom frame 5 close to the ground, and is used to lift the bottom frame 5 to prevent the pulley set 6 from moving.

[0051] In one possible implementation, the lifting assembly may, for example, include a fixed support rod and an adjustable lifting support foot, wherein the end of the fixed support rod away from the ground is fixedly connected or detachably connected to the end of the bottom frame 5 close to the ground; and the end of the support foot away from the ground is spirally connected to the screw hole of the end of the fixed support rod close to the ground. The support foot includes a screw rod and a support pad, wherein the end of the screw rod away from the ground is spirally connected to the screw hole of the end of the fixed support rod close to the ground, and the end close to the ground is fixedly connected to the support pad. When the entire measurement auxiliary device is pushed to the position to be measured, after the pulley block 6 is locked, the support foot can be twisted to contact the ground. The provision of the lifting assembly further increases the stability of the entire measurement auxiliary device on the basis of being provided with the pulley block 6.

[0052] Optionally, guardrails 4 are provided on both sides of the first ladder 1 , the second ladder 2 and the standing platform 3 .

[0053] In this embodiment, the provision of the guardrail 4 can effectively prevent the measurement personnel from accidentally falling when climbing or standing, and especially provides additional safety protection when performing flatness measurement at heights.

[0054] In a possible implementation, the guardrail 4 can be, for example, a steel pipe structure. In addition, the guardrail 4 can also be integrated with tools such as tool hooks and equipment brackets to increase the practicality of the guardrail 4.

[0055] Optionally, the standing platform 3 is a multi-section nested retractable structure.

[0056] In one possible implementation, the standing platform 3 comprises a multi-stage, nested, retractable structure. For example, this structure can be a sleeve-like structure, meaning the standing platform 3 is composed of multiple steel sleeves of varying side lengths, with the innermost sleeve being the smallest, followed by successively larger sleeves nested within it. When the climbing surface of the first ladder 1 is connected to the standing surface of the standing platform 3 at a preset angle, and the climbing surface of the second ladder 2 is connected to the standing surface of the standing platform 3 at a preset angle, the sleeves can be extended and retracted via guides (such as guide rails or retaining grooves). Furthermore, a snap or spring lock is designed into the guide rails or retaining grooves of the sleeves. When the inner sleeve is extended to a specific position, the snap or spring lock automatically engages with a preset groove, securing the sleeve in place. The largest sleeve is connected to one end of the first ladder 1, and the smallest sleeve is connected to one end of the second ladder 2. During extension and retraction, the inner sleeve can be pulled out of or pushed into the outer sleeve. In a telescopic, multi-stage nested telescopic structure, balls or rollers can be placed on the guide rails. These reduce friction between the inner and outer sleeves. As the inner sleeve is pulled out of or pushed in from the outer sleeve, the balls or rollers roll on the guide rails, making telescopic operation easier. This is especially true for long or heavy sleeves, reducing manual effort and improving efficiency.

[0057] In one possible implementation, when the climbing surface of the first ladder 1 is connected to the standing surface of the standing platform 3 at a preset angle, and the climbing surface of the second ladder 2 is connected to the standing surface of the standing platform 3 at a preset angle, and the measurement auxiliary device includes a bottom frame 5, the standing platform 3 is configured as a multi-section nested telescopic structure. In this case, the bottom frame 5 can be, for example, a rectangular steel pipe frame, and the ends of the bottom frame 5 not connected to the first ladder 1 and the second ladder 2 can be configured as a telescopic rod structure. The telescopic rod structure, for example, includes a telescopic sleeve, a telescopic rod, and a connecting component. One end of the telescopic sleeve is fixedly connected to the end of the bottom frame 5 connected to the first ladder 1, and the telescopic sleeve has a first through-hole. One end of the telescopic rod is inserted into the other end of the telescopic sleeve, and the other end of the telescopic rod is fixedly connected to the end of the bottom frame 5 connected to the second ladder 2. The telescopic rod also has multiple second through-holes. The connecting component is inserted between the first through-hole and the second through-hole to secure the telescopic sleeve and the telescopic rod. Before using the measurement auxiliary device, two surveyors can stretch or shrink the measurement auxiliary device to an appropriate length according to the diameter of the wind turbine tower, so that the surveyors can perform a large-scale measurement of the flatness measurement points when using it, thereby reducing the number of times the measurement auxiliary device is moved and improving measurement efficiency.

[0058] In one possible implementation, when the climbing surface of the first ladder 1 is connected to the standing surface of the standing platform 3 at a preset angle, and the climbing surface of the second ladder 2 is connected to the standing surface of the standing platform 3 at a preset angle, and the measurement assisting device also includes a guardrail 4, the standing platform 3 is configured as a multi-section nested retractable structure. In this case, the anti-slip guardrail provided on the standing platform 3 can also be configured as a telescopic rod structure, for example. This telescopic rod structure can refer to the telescopic rod structure provided on the rectangular steel pipe frame described above and will not be further described here.

[0059] Optionally, the footrests of the first and second ladders 1 and 2 are provided with rubber anti-skid pads, and the standing surface is provided with uneven anti-skid patterns. The provision of rubber anti-skid pads and anti-skid patterns can increase the friction between the device and the soles of the measurement personnel's feet, reducing the risk of injury to the measurement personnel during use.

[0060] It should be noted that references in this specification to "one embodiment," "an embodiment," "an exemplary embodiment," "some embodiments," and the like indicate that the described embodiment may include a particular feature, structure, or characteristic, but not necessarily every embodiment includes that particular feature, structure, or characteristic. Furthermore, such phrases do not necessarily refer to the same embodiment. Furthermore, when a particular feature, structure, or characteristic is described in conjunction with an embodiment, it is within the knowledge of those skilled in the art to implement such feature, structure, or characteristic in conjunction with other embodiments, whether explicitly described or not.

[0061] Generally speaking, terms should be understood, at least in part, based on the context in which they are used. For example, as used herein, the term "one or more" can be used to describe any feature, structure, or characteristic in the singular sense, or can be used to describe a combination of features, structures, or characteristics in the plural sense, depending at least in part on the context. Similarly, terms such as "a," "an," or "the" can also be understood to convey either singular or plural usage, depending at least in part on the context.

[0062] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A wind turbine tower flatness measurement auxiliary device, characterized in that: The measurement auxiliary device includes: a first ladder, a second ladder and a standing platform; One end of the first ladder is rotatably connected to one end of the standing platform; one end of the second ladder is rotatably connected to an end of the standing platform away from the first ladder; When the crawling surface of the first ladder is connected to the standing surface of the standing platform at a preset angle, and the crawling surface of the second ladder is connected to the standing surface of the standing platform at a preset angle, the first ladder and the second ladder are mirror-symmetrical, one end of the first ladder away from the standing platform and the other end of the second ladder away from the standing platform are set on the ground, the standing surface is parallel to the ground, and the standing surface is lifted to a preset height by the first ladder and the second ladder.

2. The measurement auxiliary device according to claim 1, characterized in that One end of the first ladder connected to the standing platform and one end of the second ladder connected to the standing platform are provided with a buckle assembly, and the buckle assembly is used to limit the relative rotation angle of the crawling surface of the first ladder and the standing surface of the standing platform to not exceed the preset angle, and the relative rotation angle of the crawling surface of the second ladder and the standing surface of the standing platform to not exceed the preset angle.

3. The measurement auxiliary device according to claim 2, characterized in that When the crawling surface of the first ladder is connected to the standing surface of the standing platform at a preset angle and the crawling surface of the second ladder is connected to the standing surface of the standing platform at a preset angle, a stabilizing component is provided between a side of the first ladder facing away from the crawling surface and a side of the second ladder facing away from the crawling surface.

4. The measurement auxiliary device according to claim 1, characterized in that The measurement auxiliary device also includes a bottom end frame; One end of the bottom frame away from the ground is detachably connected to one end of the first ladder away from the standing platform and one end of the second ladder away from the standing platform.

5. The measurement auxiliary device according to claim 4, characterized in that At least one pulley set is provided at one end of the bottom frame close to the ground.

6. The measurement auxiliary device according to claim 5, characterized in that The measurement auxiliary device also includes a lifting component; The lifting assembly is arranged at one end of the bottom frame close to the ground, and the lifting assembly is used to lift the bottom frame.

7. The measurement auxiliary device according to claim 1, characterized in that Guardrails are provided on both sides of the first ladder, the second ladder and the standing platform.

8. The measurement auxiliary device according to claim 1, characterized in that The standing platform is a multi-section nested retractable structure.

9. The measurement auxiliary device according to claim 1, characterized in that The footrest parts of the first ladder and the second ladder are provided with rubber anti-slip pads.

10. The measurement auxiliary device according to claim 1, characterized in that The standing surface is provided with uneven anti-skid patterns.

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