Walking device and equipment overhaul stand

By designing a segmented, assembled walking device, and utilizing walking wheels and locking components, the difficulties and safety issues of maintaining high-altitude equipment were solved, achieving stable movement and accurate positioning of the equipment, and improving maintenance efficiency and safety.

CN120941341APending Publication Date: 2025-11-14北方联合电力有限责任公司乌海热电厂
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Patent Information

Application Number
CN202511192952.2
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-08-25
Publication Date
2025-11-14

AI Technical Summary

Technical Problem

In industrial production, the maintenance of high-altitude equipment is difficult, and manual maintenance poses safety hazards and cannot provide a comprehensive inspection.

Method used

Design a walking device, including a mounting component, a walking component, and a locking component. The mounting component is a segmented assembly structure. The walking component moves along the outer wall of the device via walking wheels. The locking component locks itself by contacting the device surface with a limit block, ensuring stable movement and locking of the device in the axial direction of the device.

Benefits of technology

It enables accurate positioning and flexible movement during equipment maintenance, reducing the risks of manual high-altitude operations and improving maintenance efficiency and safety.

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Abstract

The invention discloses a walking device and an equipment overhaul stand, and the walking device is characterized in that the walking device comprises a mounting assembly which is of a segmented assembly structure and is arranged around target equipment; the walking assemblies are arranged on the basis of the mounting assembly and comprise walking wheels used for making contact with the outer wall of the target equipment, the at least two sets of walking assemblies are evenly arranged in the circumferential direction of the mounting assembly, and the walking wheels can rotate clockwise and anticlockwise; and the locking assembly is arranged on the mounting assembly, the locking assembly comprises a limiting block which is arranged in a telescopic mode, and one side of the limiting block stretches out to abut against the target equipment so as to lock the walking device. According to the walking device, a bearing foundation is provided through the mounting assembly, advancing and locking of the walking device at any position in the axial direction of the target equipment are achieved through cooperation of the walking assembly and the locking assembly, and the walking device has the advantages of being stable in structure, flexible in walking and accurate in positioning.
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Description

Technical Field

[0001] This application relates to the field of equipment maintenance technology, and in particular to a walking device and an equipment maintenance platform. Background Technology

[0002] In industrial production, many pieces of equipment have significant height, such as tower structures and vertical storage tanks. These require regular inspection and maintenance during operation. However, due to their height, manual inspection presents numerous difficulties. Firstly, maintenance personnel need ladders or lifting equipment to reach the inspection points, posing safety hazards. Secondly, some equipment has smooth or tilted surfaces, limiting the reach of personnel and preventing comprehensive inspection. To address these issues, existing technologies urgently need improvement. Summary of the Invention

[0003] In view of this, the purpose of this application is to provide a walking device and equipment maintenance platform to reduce the difficulty of equipment maintenance and meet the requirements of accurate positioning and flexible movement during equipment maintenance.

[0004] A walking device, comprising:

[0005] Install components for a segmented assembly structure and set up around the target device;

[0006] A walking assembly, based on the mounting assembly and including walking wheels for contacting the outer wall of the target device, wherein at least two sets of the walking assembly are evenly arranged along the circumference of the mounting assembly, and the walking wheels are capable of rotating clockwise and counterclockwise.

[0007] A locking component is disposed on the mounting component, the locking component including a telescopically oriented limiting block, one side of the limiting block extending out to abut against the target device to lock the walking device.

[0008] Preferably, in the above-described walking device, the locking component and the walking component are spaced apart axially from each other on the mounting component and are arranged in a one-to-one correspondence.

[0009] Preferably, in the above-mentioned walking device, the locking assembly includes a fixed seat and a power unit. The fixed seat has a hollow cavity, and the limiting block is slidably disposed in the cavity of the fixed seat. The first wall of the limiting block is an arc-shaped wall surface that fits against the outer wall of the target device. The power unit is drivenly connected to the limiting block to drive the limiting block to slide in the cavity of the fixed seat.

[0010] Preferably, in the above-mentioned walking device, the output end of the power unit is connected to a push block, the push block is located in the cavity of the fixed seat, and moves along the thickness direction of the fixed seat under the drive of the power unit; the push block abuts against the limiting block through the driving inclined surface, and the limiting block maintains a continuous abutment effect with the fixed seat through the elastic force of the limiting spring.

[0011] Preferably, in the above-mentioned walking device, the second wall of the limiting block is connected to a sliding rod, and a limiting plate is provided at the end of the sliding rod away from the limiting block. The two ends of the limiting spring are connected to the limiting plate and the fixed seat, and are kept in a compressed state during the operation of the limiting block.

[0012] Preferably, in the above-described walking device, the pushing block includes a set of parallel limiting planes, one of which is connected to the driving inclined plane; when the limiting block is in the extended state, the pushing block abuts against the fixed seat and the second wall of the limiting block through the set of limiting planes.

[0013] Preferably, in the above-mentioned walking device, the walking component includes a rotating shaft and a driving unit, the first end of the rotating shaft is fixedly connected to the walking wheel, and the second end of the rotating shaft is driven to rotate by the driving unit.

[0014] Preferably, in the above-mentioned walking device, the driving unit is a motor and its output end is connected to a first gear, and a second gear is fixedly provided at the second end of the rotating shaft. The first gear meshes with the second gear or is driven by a transmission belt.

[0015] Preferably, in the above-mentioned walking device, the mounting assembly includes an arc-shaped first ring and a second ring, both of which are semi-circular structures and are joined together by positioning members and connecting members to form a circular ring.

[0016] Preferably, in the above-mentioned walking device, the positioning component includes a plurality of positioning posts disposed on the end face of the first collar, and positioning grooves disposed on the end face of the second collar, corresponding one-to-one with the positioning posts;

[0017] The connector includes connecting posts respectively disposed on the first collar and the second collar, and a connecting piece capable of simultaneously fitting two of the connecting posts, the connecting piece being fixedly connected to the connecting posts by a locking ring.

[0018] Preferably, the above-described walking device includes the walking device described in any of the above-described embodiments, as well as a support plate and / or an image scanning component disposed on the walking device.

[0019] As can be seen from the above technical solution, the walking device provided in this application mainly includes a mounting component, a walking component, and a locking component. The mounting component is a segmented assembly structure, which can be assembled around the target equipment from the outside. The walking component is set on the mounting component and includes walking wheels that can contact the outer wall of the target equipment. The walking wheels, which are evenly distributed around the circumference of the mounting component, can abut against the outer wall of the target equipment and move up and down in the axial direction of the target equipment by rotating the walking wheels clockwise and counterclockwise. The locking component abuts against the outer wall of the equipment by telescopic limit blocks to achieve reliable locking of the entire walking device. The walking device provided in this application provides a load-bearing foundation through the mounting component and, through the cooperation of the walking component and the locking component, enables the walking device to move and lock at any position in the axial direction of the target equipment, thus having the advantages of stable structure, flexible movement, and accurate positioning. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the walking device structure provided in an embodiment of the present disclosure;

[0022] Figure 2 A flip-out structural view of the traveling component and locking component in the traveling device;

[0023] Figure 3 An exploded view of the locking assembly;

[0024] Figure 4 An exploded view of the installed components.

[0025] in:

[0026] 10-Installation component; 110-First collar; 120-Second collar; 130-Positioning component; 1310-Positioning post; 1320-Positioning groove; 140-Connector; 1410-Connecting post; 1420-Connecting piece; 1430-Locking ring;

[0027] 20-Traveling assembly; 210-Traveling wheel; 220-Rotating shaft; 230-Drive unit; 240-First gear; 250-Second gear; 260-Transmission belt;

[0028] 30-Locking assembly; 310-Limit block; 320-Fixed base; 330-Power unit; 340-Push block; 3410-Drive ramp; 3420-Limit plane; 350-Limit spring; 360-Slide rod; 370-Limit disc. Detailed Implementation

[0029] The core of this application is to disclose a walking device and equipment maintenance platform to reduce the difficulty of equipment maintenance and meet the needs of accurate positioning and flexible movement during the equipment maintenance process.

[0030] To enable those skilled in the art to better understand the present application, embodiments of the present application will be described below with reference to the accompanying drawings. Furthermore, the embodiments shown below do not limit the scope of the invention as described in the claims. Additionally, the complete contents of the structures represented in the following embodiments are not limited to those necessary for the solution of the invention described in the claims.

[0031] like Figure 1 and Figure 2 As shown, this disclosure provides a walking device, which mainly includes a mounting component 10, a walking component 20, and a locking component 30. The mounting component 10 adopts a segmented assembly structure so that it can be assembled around the target device. The walking component 20 includes at least two sets of walking wheels 210 that are evenly distributed around the circumference of the mounting component 10 and can rotate in both directions. The locking component 30 abuts against the surface of the device through a telescopic limiting block 310 to lock the entire walking device.

[0032] Specifically, for the installation component 10, its segmented assembly structure refers to a ring frame formed by splicing two or more arc-shaped components, allowing for rapid assembly on the outer wall of the equipment and avoiding the operational difficulties and risks associated with overall hoisting. The bidirectional rotation capability of the traveling wheels 210 means that the wheels can rotate clockwise and counterclockwise under driving action, enabling the device to move forward and backward along the axial direction of the equipment. Furthermore, with two or more sets of traveling wheels 210 evenly distributed along the circumference in the traveling component 20, a uniform abutment force can be applied to the circumference of the target equipment through the traveling wheels 210, resulting in relatively uniform force distribution in all directions during the traveling process, thus improving the stability of the traveling process. The telescopic limiting block 310 of the locking assembly 30 refers to a mechanical stop component with a linear motion stroke. It generates frictional braking force through pressing action by means of physical contact. When a fixed position is required, the limiting block 310 of the locking assembly 30 extends and forms one or more points of contact with the surface of the equipment. After the traveling wheel 210 stops running, the downward trend of the traveling device is counteracted by the top pressure and friction of the limiting block 310, thus satisfying the need for the traveling device to be locked at any time. Correspondingly, when the traveling device is in a moving state, the limiting block 310 retracts to ensure the effective driving action of the traveling wheel 210.

[0033] Through the above technical solution, this application achieves the purpose of safe and reliable autonomous movement and precise positioning on the surface of equipment with a certain height. The segmented installation structure shortens the equipment deployment time, the 210 sets of bidirectional walking wheels improve the bidirectional movement requirements, and the locking component 30 ensures the stability of the device during maintenance operations, effectively solving the technical problems of low efficiency and high risk of manual high-altitude operations.

[0034] Furthermore, in some embodiments of this disclosure, the locking component 30 and the traveling component 20 are spaced apart and corresponding one-to-one in the axial direction of the mounting component 10. It should be noted that the axial spacing means that the locking component 30 and the traveling component 20 maintain a certain distance along the axial direction of the mounting component 10, so that the movement trajectory of the locking component 30 will not overlap with that of the traveling wheel 210 when it moves, thus avoiding mutual interference between the two. The one-to-one correspondence means that each traveling component 20 is equipped with a corresponding locking unit to achieve standardized installation of the equipment. At the same time, it enables the driving force and locking force of the traveling device to be applied in the same straight line direction outside the target equipment, which makes the traveling device more stable during the transition from movement to locking.

[0035] To further optimize the above technical solution, in some embodiments of this disclosure, such as Figure 2 and Figure 3 As shown, the locking assembly 30 includes a fixed base 320 and a power unit 330. Specifically, the fixed base 320 has a hollow cavity, and the limiting block 310 is slidably disposed in the cavity of the fixed base 320. The fixed base 320 provides a sliding track constraint for the limiting block 310 through its cavity structure. Considering common working conditions, the first wall of the limiting block 310, that is, the side wall facing the target device, is a contact surface that matches the curvature of the outer wall of the target device, so as to increase the contact area and achieve stable contact with the outer wall of the target device.

[0036] The power unit 330 refers to the actuator that generates linear driving force. It can be an electric push rod or a cylinder, and is connected to the limit block 310 through a rigid connecting rod or gear rack and pinion structure that can achieve linear drive.

[0037] Specifically, after the power unit 330 is activated, it can push the limiting block 310 to slide towards the outer wall of the target equipment. At this time, the arc-shaped wall surface of the limiting block 310 is completely in contact with the equipment surface, forming a surface contact lock to achieve positioning of the traveling device. In the unlocked state, the power unit 330 reverses its movement to drive the limiting block 310 back into the cavity, causing the arc-shaped wall surface to detach from the equipment surface. During this process, the cavity of the fixing seat 320 guides the sliding trajectory of the limiting block 310, ensuring that the contact surface always remains parallel to the outer wall of the equipment, reducing the risk of locking failure when the contact is tilted.

[0038] It should also be noted that this solution utilizes the curved surface of the limiting block 310 to conform to the curved surface of the equipment's outer wall, evenly distributing the contact pressure across the entire contact area, thus improving locking stability and resolving the problem of insufficient locking contact stability. This prevents surface damage caused by excessive local stress. Furthermore, the transmission drive of the power unit 330 replaces manual operation, improving the response speed of the locking action and enabling precise displacement control through the control system. The sliding constraint of the cavity of the fixed seat 320 on the limiting block 310 eliminates potential lateral displacement during locking, ensuring consistent locking position.

[0039] Based on the above embodiments, in order to improve the driving stability of the power unit 330 on the limiting block 310, a push block 340 is connected to the output end of the power unit 330. The push block 340 is located in the cavity of the fixed base 320 and can move along the thickness direction of the fixed base 320 under the drive of the power unit 330. Here, the thickness direction of the fixed base 320 is the axial direction of the target device. Specifically, the push block 340 is a rigid transmission component directly connected to the output end of the power unit 330, used to transmit the linear driving force of the power unit 330 to the limiting block 310. Furthermore, the push block 340 abuts against the limit block 310 via the drive inclined surface 3410. The drive inclined surface 3410 refers to the inclined structure set on the contact surface between the push block 340 and the limit block 310. Specifically, it can be designed with an inclined surface angle of 45 degrees to 60 degrees to convert the linear motion of the push block 340 into the radial displacement of the limit block 310. On this basis, the limit block 310 maintains a continuous abutment effect with the fixed seat 320 through the elastic force of the limit spring 350. The limit spring 350 is set between the limit block 310 and the fixed seat 320 and adopts a cylindrical helical compression spring to provide a continuous elastic preload during the movement of the limit block 310.

[0040] Specifically, when the extension of the limiting block 310 is required, the power unit 330 is activated, and the pushing block 340 is driven to move linearly along the thickness direction of the fixed base 320. Its driving inclined surface 3410 contacts the limiting block 310, and with the inclination angle of the driving inclined surface 3410, the linear motion of the pushing block 340 is decomposed into a radial displacement component of the limiting block 310. This causes the limiting block 310 to extend outward against the elastic force of the limiting spring 350. Simultaneously, during the movement of the limiting block 310, the limiting spring 350 consistently applies a force to the limiting block 310 that is opposite to the direction of its extension. When the power unit 330 drives the pushing block 340 away from the limiting block 310, the elastic force of the limiting spring 350 causes the limiting block 310 to retract. The limiting block 310 retracts evenly under the guidance of the driving inclined surface 3410, achieving stable operation of the limiting block 310.

[0041] To further enhance the stability of the movement of the limiting block 310, in some embodiments of this disclosure, a sliding rod 360 is connected to the second wall of the limiting block 310. It should be noted that the sliding rod 360 is a rod-shaped structure rigidly connected to the limiting block 310. It can be a round or square rod, providing axial guidance and constraint for the limiting block 310 to prevent jamming caused by offset. A limiting plate 370 is provided at the end of the sliding rod 360 away from the limiting block 310. This plate can be fixed by welding or threaded connection to provide a fixed end for the limiting spring 350, forming a stable elastic support system. Specifically, the limiting spring 350 is sleeved on the outer periphery of the slide bar 360, and its two ends are respectively connected to the limiting plate 370 and the fixed seat 320. Through the pre-tightening force generated by the continuous compression state, it ensures that the limiting block 310 can always be subjected to the elastic force generated by the limiting spring 350, which acts away from the surface of the target equipment. This allows the limiting block 310 to maintain stability by making close contact with the pushing block 340 when it extends, and to respond quickly when it retracts by means of the elastic force, thus avoiding resistance to the operation of the traveling wheel 210.

[0042] Furthermore, in some embodiments of this disclosure, such as Figure 3 As shown, the push block 340 includes a set of parallel limiting planes 3420. It should be noted that one of the limiting planes 3420 is connected to the driving inclined surface 3410 in a continuous state. When the limiting block 310 is in the extended state, the push block 340 abuts against the fixed seat 320 and the second wall of the limiting block 310 through the set of limiting planes 3420. The limiting planes 3420 refer to two parallel contact surfaces disposed on the surface of the push block 340, located on both sides in the extension and retraction directions of the limiting block 310, to form rigid support when the limiting block 310 is extended. During the process of converting the linear motion of the power unit 330 into the lateral displacement of the limiting block 310, the driving inclined plane 3410 will move to the maximum extension state. At this time, the position of the limiting block 310 can be stabilized by the continuous power output of the power unit 330. With the help of a set of limiting planes 3420 in this embodiment, after the limiting block 310 moves to the maximum extension state, the pair of limiting planes 3420 can achieve rigid contact with the second wall of the fixed seat 320 and the limiting block 310, thereby restricting the retraction of the limiting block 310. At this time, the power unit 330 can stop the power output and lock the limiting block 310 through the limiting planes 3420, ensuring that the limiting block 310 will not retract due to vibration or external force in the extended state, thus improving its positional stability during the limiting process.

[0043] Through the above technical solution, this application achieves precise guidance during the engagement of the push block 340 and the limit block 310, ensuring the stability of the limit block 310 in its extended state. The rigid contact between the limit plane 3420 and the fixed seat 320 forms a reliable reaction force support, preventing abnormal retraction of the limit block 310 and significantly improving the positioning reliability of the locking assembly 30 during equipment maintenance.

[0044] Furthermore, in some embodiments of this disclosure, the walking assembly 20 includes a rotating shaft 220 and a drive unit 230. The first end of the rotating shaft 220 is fixedly connected to the walking wheel 210, and the second end of the rotating shaft 220 is driven to rotate by the drive unit 230. The rotating shaft 220 is a rigid transmission component connecting the walking wheel 210 and the drive unit 230. One end is fixedly connected to the walking wheel 210, and the other end forms a transmission connection structure with the drive unit 230 to transmit rotational torque. The drive unit 230 can be a motor or a hydraulic cylinder, connected to the second end of the rotating shaft 220 through its output end to achieve bidirectional rotation control, thereby driving the walking wheel 210 to roll against the outer wall of the equipment, thus moving the walking device.

[0045] In a specific embodiment of this disclosure, such as Figure 2 As shown, the drive unit 230 can use a servo motor or a stepper motor as a power source. A first gear 240 is connected to the motor output end, directly driving the first gear 240 to rotate when the motor outputs power. A second gear 250 is fixedly installed at the second end of the rotating shaft 220. Power is transmitted between the first gear 240 and the second gear 250 through meshing or a transmission belt 260. After the motor starts, it drives the first gear 240 to rotate through the output shaft. The transmission action between the first gear 240 and the second gear 250 transmits the rotational motion to the rotating shaft 220, ultimately driving the traveling wheel 210 to move along the outer wall of the equipment. When using a transmission belt 260, the first gear 240 is replaced by a driving pulley, and the second gear 250 is replaced by a driven pulley. The transmission belt 260 forms a closed loop around both, transmitting power through tooth meshing or friction. The two transmission methods can be flexibly switched according to the friction coefficient of the outer wall of the equipment, the traveling load, and environmental noise requirements. Gear meshing is selected for scenarios requiring high torque output, while the transmission belt 260 is selected for scenarios requiring reduced vibration and noise. It should be noted that gear transmission has higher structural stability and allows for direct maintenance and replacement of gears with different numbers of teeth to meet different transmission ratio requirements.

[0046] Furthermore, such as Figure 1 and Figure 4As shown, in some embodiments of this disclosure, the mounting assembly 10 includes an arc-shaped first collar 110 and a second collar 120. Both the first collar 110 and the second collar 120 are semi-circular structures, i.e., split-type annular components. Their inner diameter is adapted to the outer diameter of the target device, allowing them to be set at a designed interval. The positioning element 130 is used to accurately determine the positions of the first collar 110 and the second collar 120 during assembly. Based on this, the first collar 110 and the second collar 120 are locked together via the connector 140. In some specific embodiments, the positioning element 130 includes a plurality of positioning posts 1310 disposed on the end face of the first collar 110 and a plurality of positioning grooves 1320 disposed on the end face of the second collar 120. The positioning posts 1310 and the positioning grooves 1320 are arranged in a one-to-one correspondence. During the assembly of the first collar 110 and the second collar 120, the positioning posts 1310 are inserted into the corresponding positioning grooves 1320 to complete the initial alignment, eliminating any possible circumferential offset during assembly. The connector 140 includes connecting posts 1410 respectively disposed on the first collar 110 and the second collar 120, and a connecting piece 1420 capable of simultaneously fitting onto the connecting posts 1410 on both sides. After the first collar 110 and the second collar 120 are initially aligned, the connecting piece 1420 is inserted into the connecting posts 1410 on both collars and locked to the connecting posts 1410 by a locking ring 1430, which can be threaded or snap-locked. The dual action of the positioning member 130 and the connector 140 forms a closed-loop constraint, ensuring that misalignment does not occur at the collar mating point when subjected to radial loads.

[0047] In some specific embodiments, the positioning pins 1310 can be configured as cylindrical structures, with three pins evenly distributed along the circumference of the collar end face. The connecting pins 1410 can have a square cross-section design, and the inner wall of the connecting piece 1420 is provided with a rubber pad to buffer vibration and impact. The locking ring 1430 can be a ring structure with internal threads, applying axial clamping force through the threaded connection.

[0048] Furthermore, this disclosure also provides an equipment maintenance platform, which includes the walking device provided in any of the above embodiments to achieve movement and locking along the axial direction of the target equipment. The platform also includes a support plate mounted on the walking device to provide footholds for personnel to meet their maintenance needs. Additionally, the platform may include an image scanning component mounted on the walking device to acquire the surface status of the equipment via remote control, thus meeting remote maintenance requirements. It should be noted that since the walking device possesses the technical effects provided in any of the above embodiments, the equipment maintenance platform also possesses the technical effects provided in any of the above embodiments, and will not be elaborated upon further here.

[0049] It should be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings. Unless otherwise specified, the embodiments and features described herein can be combined with each other.

[0050] As indicated in this invention and the claims, unless the context clearly indicates otherwise, the words "a," "an," "an," and / or "the" do not specifically refer to the singular and may also include the plural. Generally speaking, the terms "comprising" and "including" only indicate the inclusion of explicitly identified steps and elements, which do not constitute an exclusive list, and the method or apparatus may also include other steps or elements. An element defined by the phrase "comprising an..." does not exclude the presence of other identical elements in the process, method, product, or apparatus that includes the element.

[0051] Hereinafter, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

[0052] The above description is merely a preferred embodiment of the present invention and an explanation of the technical principles employed, and is not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. The scope of the invention is not limited to the technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the above-described inventive concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in the present invention.

Claims

1. A walking device, characterized in that, include: Install components for a segmented assembly structure and set up around the target device; A walking assembly, based on the mounting assembly and including walking wheels for contacting the outer wall of the target device, wherein at least two sets of the walking assembly are evenly arranged along the circumference of the mounting assembly, and the walking wheels are capable of rotating clockwise and counterclockwise. A locking component is disposed on the mounting component, the locking component including a telescopically oriented limiting block, one side of the limiting block extending out to abut against the target device to lock the walking device.

2. The walking device as described in claim 1, characterized in that, The locking component and the traveling component are spaced apart axially on the mounting component and are arranged in a one-to-one correspondence.

3. The walking device as described in claim 1, characterized in that, The locking assembly includes a fixed base and a power unit. The fixed base has a hollow cavity. The limiting block is slidably disposed in the cavity of the fixed base, and the first wall of the limiting block is an arc-shaped wall surface that fits against the outer wall of the target device. The power unit is drivenly connected to the limiting block to drive the limiting block to slide in the cavity of the fixed base.

4. The walking device as described in claim 3, characterized in that, The output end of the power unit is connected to a push block, which is located in the cavity of the fixed seat and moves along the thickness direction of the fixed seat under the drive of the power unit; the push block abuts against the limiting block through the driving inclined surface, and the limiting block maintains a continuous abutment effect with the fixed seat through the elastic force of the limiting spring.

5. The walking device as described in claim 4, characterized in that, The second wall of the limiting block is connected to a sliding rod, and a limiting plate is provided at the end of the sliding rod away from the limiting block. The two ends of the limiting spring are connected to the limiting plate and the fixed seat, and are kept in a compressed state during the operation of the limiting block.

6. The walking device as described in claim 5, characterized in that, The pushing block includes a set of parallel limiting planes, one of which is connected to the driving inclined surface; when the limiting block is in the extended state, the pushing block abuts against the fixed seat and the second wall of the limiting block through the set of limiting planes.

7. The walking device as described in claim 1, characterized in that, The walking assembly includes a rotating shaft and a drive unit. The first end of the rotating shaft is fixedly connected to the walking wheel, and the second end of the rotating shaft is driven to rotate by the drive unit.

8. The walking device as described in claim 7, characterized in that, The drive unit is a motor and its output end is connected to a first gear. A second gear is fixedly installed at the second end of the rotating shaft. The first gear meshes with the second gear or is driven by a transmission belt.

9. The walking device as described in claim 1, characterized in that, The mounting assembly includes an arc-shaped first ring and a second ring, both of which are semi-circular structures and are joined together by positioning and connecting parts to form a circular ring.

10. The walking device as described in claim 9, characterized in that, The positioning component includes a plurality of positioning posts disposed on the end face of the first collar, and positioning grooves disposed on the end face of the second collar, each corresponding to one of the positioning posts; The connector includes connecting posts respectively disposed on the first collar and the second collar, and a connecting piece capable of simultaneously fitting two of the connecting posts, the connecting piece being fixedly connected to the connecting posts by a locking ring.

11. A device maintenance platform, characterized in that, It includes the walking device according to any one of claims 1-10, and a support plate and / or image scanning assembly disposed on the walking device.