Rotating wheel inspection platform

Abstract

The invention relates to the technical field of equipment overhaul stands, in particular to a runner overhaul platform which comprises a supporting seat used for supporting a runner hub and an annular supporting plate fixedly mounted above the runner hub. An access hole is formed in the middle of the annular supporting plate; an annular guardrail is fixed to the outer side edge of the annular supporting plate in a surrounding mode. A fixing assembly is arranged between the runner hub and the annular supporting plate. And an operation opening for workers to enter is formed in the annular supporting plate and located on one side of the access opening. By adopting the runner maintenance platform, an all-round scaffold can be prevented from being temporarily erected during each maintenance, so that the maintenance and installation efficiency is greatly improved, and the human body cost and the time cost are reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of equipment overhaul platforms, and particularly to a runner body overhaul platform. Background Art

[0002] In a hydropower station, a Kaplan turbine unit is used for power generation. After the unit has been used for a period of time, it needs to be overhauled at level A to ensure that the Kaplan turbine unit can operate normally and stably. During the disassembly and repair process, the overhaul of the runner body is a particularly important link. The runner body in the prior art is about six meters tall. During the disassembly and repair process, the runner body is placed on a specific support base, and the height of the support base is 1.5 meters, so the total height reaches 7.5 meters, which also brings difficulties to the disassembly and overhaul of the runner body.

[0003] In the industry, during the traditional overhaul of Kaplan turbine units, when inspecting and disassembling each component of the runner body and replacing each seal, it is necessary to completely disassemble the unit at level A before overhauling each mechanism of the runner body. During the disassembly process of the runner body, due to the excessive height of the runner body, the traditional method is to build a full hall scaffold around the runner body and then disassemble the runner body. Although this method can complete the overhaul work of the runner body, this working platform will consume a large amount of labor costs and time costs during the construction and disassembly processes. Summary of the Invention

[0004] (I) Technical Problems to be Solved In view of the deficiencies of the prior art, the present invention provides a runner body overhaul platform, which improves the overhaul and installation efficiency and reduces the labor cost and time cost.

[0005] (II) Technical Solutions To achieve the above object, an embodiment of the present application provides a runner body overhaul platform, which includes a support base for supporting the runner body and an annular support plate fixedly installed above the runner body; a maintenance opening is formed in the middle of the annular support plate; an annular guardrail is fixedly arranged around the outer side of the annular support plate; a fixing component is arranged between the runner body and the annular support plate; and an operation opening for workers to enter is formed on one side of the annular support plate and located at the maintenance opening.

[0006] Preferably, the runner body overhaul platform further includes a base supported on the ground. The base is U-shaped and is arranged around the outside of the support base in a ring shape, and a limiting component is arranged between the base and the support base; a vertical support arm is fixed at one end of the base far away from the opening, and a horizontal support platform is installed at the end of the support arm away from the base. The support platform is located below the annular support plate and supports and positions the annular support plate from the lower side.

[0007] Preferably, the support platform is U-shaped, and both ends of the support platform form parallel positioning plates; positioning grooves are provided on the upper sides of each of the positioning plates, and the length direction of the positioning grooves is parallel to the length direction of the positioning plates; guide columns are fixed on the lower side of the annular support plate and at both ends of the inspection opening, the two guide columns are parallel to each other, and the two guide columns can be respectively fitted into the two positioning grooves; a plurality of positioning components are arranged on the vertical sides of the positioning plates, and when the guide columns are fitted into the positioning grooves, the positioning components limit and fix the guide columns.

[0008] Preferably, the positioning component includes a mounting plate fixed on the vertical side of the positioning plate, the mounting plate is horizontally arranged, a driving motor is fixed on the upper side of the mounting plate, and a support block and a guide block are sequentially fixed at one end of the driving motor close to the positioning plate, and the support block is located between the guide block and the driving motor; a first mounting hole is provided in the middle of the support block, a second mounting hole is provided in the middle of the guide block, and a first positioning hole penetrating through the positioning groove is provided on the positioning plate, and the first mounting hole, the second mounting hole and the first positioning hole are coaxially arranged; a positioning screw rod is fixedly connected to the output shaft of the driving motor; a positioning column is slidably connected between the second mounting hole and the first positioning hole, and a first threaded hole is provided at one end of the positioning column close to the driving motor; one end of the positioning screw rod is rotatably connected in the first positioning hole, and the other end is threadedly connected to the first threaded hole. When the driving motor controls the positioning screw rod to rotate, the positioning column can pass through the first positioning hole and enter or slide out of the positioning groove; the cross section of the guide column is rectangular, and a second positioning hole is provided in the guide column. When the guide column is fitted into the positioning groove, the first positioning hole and the second positioning hole can be coaxially positioned. When the first positioning hole and the second positioning hole are coaxially positioned, the positioning column can pass through the first positioning hole and the second positioning hole.

[0009] Preferably, an arc-shaped groove is provided on the vertical side wall at one end of the positioning groove; a pressure sensor is fixed inside the arc-shaped groove; a spherical surface is integrally formed at one end of the guide column close to the arc-shaped groove; when the guide column enters the positioning groove and the spherical surface is embedded in the arc-shaped groove, the spherical surface abuts against the pressure sensor, the first positioning hole and the second positioning hole are in a concentric position, and the pressure sensor emits an electrical signal, and the driving motor rotates to drive the positioning screw rod to drive the positioning column into the second positioning hole.

[0010] Preferably, the fixing component includes a plurality of first fixing blocks fixed to the upper side of the hub of the runner body. A second fixing block is fixed to the lower side of the annular support plate. A stepped hole is formed in the second fixing block, and a fixing hole concentric with the stepped hole is formed in the annular support plate. A limiting hole is formed in one side of the first fixing block close to the second fixing block, and a second threaded hole is formed at the bottom of the limiting hole. A limiting sleeve is slidably connected in the stepped hole and the limiting hole. A limiting ring is integrally formed at one end of the limiting sleeve away from the first fixing block, and the limiting ring abuts against the stepped hole. A bolt is slidably arranged in the limiting sleeve. One end of the bolt passes through the limiting sleeve and is threadedly connected to the second threaded hole, and the other end of the bolt abuts against the limiting ring.

[0011] Preferably, the limiting component includes a limiting plate rotatably connected to the support base. There are two limiting plates, which are respectively located on both sides of the support base, and the two limiting plates can rotate away from each other. When the limiting plate rotates to the horizontal position, it can abut against the upper side of the base. A limiting block is integrally formed on one side of the limiting plate close to the base. Limiting openings are respectively formed on two parallel sides of the base. When the base is arranged around the support base, the limiting block can be fitted into the limiting opening.

[0012] Preferably, guide wheels are respectively arranged in the middle of the base and on the parallel vertical side walls.

[0013] Preferably, a ladder is fixedly installed on the support arm.

[0014] Preferably, the annular guardrail includes a plurality of vertical support columns fixedly spaced along the outer side wall of the annular support plate, and an annular steel bar fixed to the outside of all the vertical support columns. A skirting board is fixedly arranged on the upper side of the annular support plate.

[0015] (III) Beneficial effects The present invention provides a runner body overhaul platform. When overhauling the runner body, the runner body is supported by the provided support base, positioned by the cooperation of the base and the support base. After positioning, the annular support plate is supported and fixed by the support platform, and finally the runner body and the annular support plate are fixed by the fixing component. This method can not only improve the installation efficiency of the runner body and the annular support plate, but also improve the stability of the annular support plate and the stability of the runner body during the overhaul process through the mutual connection and positioning among the support platform, the annular support plate and the runner body, and ensure the safety of the equipment and the staff. Description of the drawings

[0016] Figure 1 It is a schematic diagram of a runner body overhaul platform of the present invention; Figure 2 Schematic diagram highlighting the annular support plate and the annular guardrail; Figure 3 Schematic diagram highlighting the base and the support platform; Figure 4 Cross-sectional view highlighting the connection structure between the annular support plate and the runner body; Figure 5 For Figure 4 Enlarged view of structure A in Figure 6 Cross-sectional view highlighting the connection structure between the support seat and the base; Figure 7 Schematic diagram highlighting the installation structure between the annular support plate and the support platform; Figure 8 For highlighting Figure 7 Enlarged view of structure B in Figure 9 Schematic diagram highlighting the position of the pressure sensor.

[0017] Markings in the drawings: 100, support seat; 200, annular support plate; 210, inspection opening; 220, operation opening; 230, fixing hole; 240, guide post; 241, second positioning hole; 242, spherical surface; 300, annular guardrail; 310, vertical support column; 320, annular steel bar; 400, fixing component; 410, first fixing block; 411, limiting hole; 412, second threaded hole; 420, second fixing block; 421, stepped hole; 430, limiting sleeve; 431, limiting ring; 440, bolt; 500, base; 510, limiting opening; 520, guide wheel; 530, support arm; 531, escalator; 600, limiting component; 610, limiting plate; 620, limiting block; 700, support platform; 710, positioning plate; 711, positioning groove; 712, first positioning hole; 713, arc-shaped groove; 720, positioning component; 721, mounting plate; 722, driving motor; 723, support block; 723a, first mounting hole; 724, guide block; 724a, second mounting hole; 725, positioning lead screw; 726, positioning column; 726a, first threaded hole; 727, pressure sensor; 800, runner body. Detailed implementation manners

[0018] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0019] Embodiment The present invention provides an overhaul platform for a runner body. Refer to Figures 1-9 , which includes a support base 100 for supporting the runner body 800 and an annular support plate 200 fixedly installed above the runner body 800. During overhaul, the runner body 800 is placed on the support base 100, and the annular support plate 200 is fixed on the upper side of the runner body 800. Workers perform overhaul on the runner body 800 on the annular support plate 200.

[0020] Specifically, an overhaul opening 210 is formed in the middle of the annular support plate 200; after installation, the middle part of the runner body 800 passes through the overhaul opening 210, and workers disassemble and overhaul the runner body 800 through the overhaul opening 210.

[0021] An annular guardrail 300 is fixedly arranged around the outer side of the annular support plate 200; specifically, the annular guardrail 300 includes a plurality of vertical support columns 310 fixedly arranged at intervals along the outer side wall of the annular support plate 200 and an annular steel bar 320 fixed on the outer side of all the vertical support columns 310; a skirting board is fixedly arranged on the upper side of the annular support plate 200. Among them, the height of the annular guardrail 300 can be set to 1 m - 1.5 m, and the thickness of the annular support plate 200 can use an anti-slip pattern steel plate, and the specific thickness is not limited as long as it can stably support the work of workers. An operation opening 220 for workers to enter is opened on the annular support plate 200 and on one side of the overhaul opening 210.

[0022] A fixing component 400 is arranged between the runner body 800 and the annular support plate 200, and the annular support plate 200 and the runner body 800 are fixed through the arranged fixing component 400.

[0023] Specifically, the fixing component 400 includes a plurality of first fixing blocks 410 fixed to the upper side of the hub of the runner body 800. A second fixing block 420 is fixed to the lower side of the annular support plate 200. A stepped hole 421 is formed in the second fixing block 420, and a fixing hole 230 concentric with the stepped hole 421 is formed in the annular support plate 200. A limiting hole 411 is formed in one side of the first fixing block 410 close to the second fixing block 420, and a second threaded hole 412 is formed at the bottom of the limiting hole 411. A limiting sleeve 430 is slidably connected in the stepped hole 421 and the limiting hole 411. A limiting ring 431 is integrally formed at one end of the limiting sleeve 430 away from the first fixing block 410, and the limiting ring 431 abuts against the stepped hole 421. A bolt 440 is slidably arranged in the limiting sleeve 430. One end of the bolt 440 passes through the limiting sleeve 430 and is threadedly connected to the second threaded hole 412. The other end of the bolt 440 abuts against the limiting ring 431, that is, the nut of the bolt 440 abuts against the limiting ring 431. During installation, it can be fixedly installed by operating from the upper side of the annular support plate 200. This setting can not only connect and fix the two, but also protect the bolt 440 by the hook. It can be reused multiple times and can be freely disassembled.

[0024] Preferably, the maintenance platform of the runner body 800 further includes a base 500 supported on the ground. The base 500 is U-shaped and is annularly arranged outside the support seat 100. A limiting component 600 is arranged between the base 500 and the support seat 100 to limit the position of the base 500 through the arranged limiting component 600.

[0025] Specifically, the limiting component 600 includes a limiting plate 610 rotatably connected to the support seat 100. There are two limiting plates 610, which are respectively located on the two parallel side arms of the support seat 100. The two limiting plates 610 can rotate away from each other, and can rotate to the horizontal position or be vertically attached to the support seat 100 during rotation.

[0026] During installation, if the U-shaped base 500 surrounds the support seat 100, when the limiting plate 610 rotates to the horizontal position, the length of the limiting plate 610 can meet the requirement of abutting against the upper side of the base 500. A limiting block 620 is integrally formed on one side surface of the limiting plate 610 close to the base 500. Limiting openings 510 are respectively formed on the two parallel side edges of the base 500. When the base 500 is annularly arranged around the support seat 100, the limiting block 620 can be fitted into the limiting openings 510. After limiting, the fixing component 400 can fix the runner body 800 and the annular support plate 200.

[0027] Preferably, in order to facilitate the installation and movement of the base 500 and the support base 100 and reduce their mutual influence during installation and movement, guide wheels 520 are respectively provided in the middle of the base 500 and on the vertical side walls that are parallel to each other. During installation, the guide wheels 520 can abut against the surface of the support base 100, thereby avoiding friction between the base 500 and the support base 100 and improving the efficiency of adjusting the position of the base 500 at the same time.

[0028] Furthermore, a vertical support arm 530 is fixed at one end of the base 500 far from the opening. A horizontal support platform 700 is installed at the end of the support arm 530 away from the base 500. One end of the support platform 700 is located below the annular support plate 200 and supports and positions the annular support plate 200 from below. Thus, the support platform 700, the annular support plate 200, and the runner body 800 are connected and positioned with each other, which not only improves the stability of the annular support plate 200 but also improves the stability of the runner body 800 during maintenance, and ensures the safety of the equipment and the staff.

[0029] Specifically, the support platform 700 is U-shaped, and both ends of the support platform 700 form parallel positioning plates 710; the annular support plate 200 is supported by the positioning plates 710. A positioning groove 711 is provided on the upper side of each positioning plate 710, and the length direction of the positioning groove 711 is parallel to the length direction of the positioning plate 710.

[0030] Guide columns 240 are fixed at both ends of the lower side surface of the annular support plate 200 and located at the inspection opening 210. The two guide columns 240 are parallel to each other. When the support platform 700 supports the annular support plate 200, the two guide columns 240 can be respectively fitted into the two positioning grooves 711.

[0031] A plurality of positioning assemblies 720 are provided on the vertical side of the positioning plate 710. When the guide column 240 is fitted into the positioning groove 711, the positioning assembly 720 limits and fixes the guide column 240.

[0032] During use, first, the annular support plate 200 is supported and fixed by the positioning plates 710, and then the annular support plate 200 and the runner body 800 are controlled to be installed and fixed. After the fixing is completed, the outer support platform 700 can play an auxiliary supporting role for the annular support plate 200. Thus, the annular support plate 200 and the runner body 800 can support each other, greatly improving the stability and safety of the runner body 800 and the annular support plate 200.

[0033] During the installation process, through the provided positioning assembly 720, the rapid fixation of the positioning plate 710 and the annular support plate 200 is realized.

[0034] Specifically, the positioning component 720 includes a mounting plate 721 fixed to the vertical side of the positioning plate 710. The mounting plate 721 is horizontally arranged. A driving motor 722 is fixed on the upper side of the mounting plate 721. One end of the driving motor 722 close to the positioning plate 710 is successively fixed with a support block 723 and a guide block 724. The support block 723 is located between the guide block 724 and the driving motor 722.

[0035] A first mounting hole 723a is provided in the middle of the support block 723, a second mounting hole 724a is provided in the middle of the guide block 724, and a first positioning hole 712 penetrating the positioning groove 711 is provided on the positioning plate 710. The first mounting hole 723a, the second mounting hole 724a, and the first positioning hole 712 are coaxially arranged.

[0036] A positioning screw rod 725 is fixedly connected to the output shaft of the driving motor 722; a positioning column 726 is slidably connected between the second mounting hole 724a and the first positioning hole 712. A first threaded hole 726a is provided at one end of the positioning column 726 close to the driving motor 722; one end of the positioning screw rod 725 is rotatably connected in the first positioning hole 712, and the other end is threadedly connected to the first threaded hole 726a. When the driving motor 722 controls the positioning screw rod 725 to rotate, the positioning column 726 can pass through the first positioning hole 712 and enter or slide out of the positioning groove 711.

[0037] Among them, the cross-section of the guide post 240 is rectangular, and a second positioning hole 241 is provided on the guide post 240. When the guide post 240 is fitted into the positioning groove 711, the first positioning hole 712 and the second positioning hole 241 can be in a coaxial position. When the first positioning hole 712 and the second positioning hole 241 are in a coaxial position, the positioning column 726 can pass through the first positioning hole 712 and the second positioning hole 241.

[0038] Preferably, an arc-shaped groove 713 is provided on the vertical side wall at one end in the positioning groove 711; a pressure sensor 727 is fixed inside the arc-shaped groove 713, and a spherical surface 242 is integrally formed at one end of the guide post 240 close to the arc-shaped groove 713; when the guide post 240 enters the positioning groove 711 and the spherical surface 242 is embedded in the arc-shaped groove 713, the spherical surface 242 abuts against the pressure sensor 727. When abutting against the pressure sensor 727, the first positioning hole 712 and the second positioning hole 241 are in a concentric position, and the pressure sensor 727 emits an electrical signal, and the driving motor 722 rotates to drive the positioning screw rod 725 to drive the positioning column 726 to enter the second positioning hole 241. When the positioning column 726 enters the second positioning hole 241, the positioning plate 710 and the guide post 240 are locked. When separation is required, the driving motor 722 is controlled to rotate in the reverse direction by an external control switch, so that the positioning screw rod 725 drives the positioning column 726 to slide out of the second positioning hole 241, that is, the unlocking of the positioning plate 710 and the guide post 240 is completed.

[0039] A ladder 531 is fixedly installed on the support arm 530. When performing maintenance, the operator can go up and down the annular support plate 200 through the ladder 531.

[0040] When it is necessary to repair the runner body 800, first place the disassembled runner body 800 on the support base 100, control the base 500 to surround the support base 100, move it to an appropriate position, and control the limiting component 600 to limit and fix the base 500 and the support base 100. Then, place the annular support plate 200 on the support platform 700, and through movement, fit the guide post 240 into the positioning groove 711 on the positioning plate 710. When the spherical surface 242 at the end of the guide post 240 abuts against the pressure sensor 727, the positioning component 720 controls to fix the annular support plate 200 and the support platform 700. After fixation, the staff fixes the runner body 800 from the upper side of the annular support platform. Furthermore, the support platform 700, the annular support plate 200, and the runner body 800 are connected and positioned with each other, which not only improves the stability of the annular support plate 200, but also improves the stability of the runner body 800 during the maintenance process, and ensures the safety of the equipment and the staff.

[0041] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", "front", "rear", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0042] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection. It can be a mechanical connection or an electrical connection. It can be directly connected or indirectly connected through an intermediate medium. It can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations. Without conflict, the embodiments in the present invention and the features in the embodiments can be combined with each other.

[0043] The above-described embodiments merely represent the implementation manners of the present invention. Their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the patent for the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all fall within the protection scope of the present invention. Therefore, the protection scope of the patent for the present invention shall be subject to the appended claims.

Claims

1. A runner body maintenance platform, characterized in that: It comprises a support seat (100) for supporting a rotating wheel body (800) and an annular support plate (200) fixedly mounted above the rotating wheel body (800); An inspection opening (210) is formed in the middle of the annular support plate (200); an annular guardrail (300) is fixed around the outer side of the annular support plate (200); a fixing assembly (400) is provided between the rotating wheel body (800) and the annular support plate (200); and an operating opening (220) for workers to enter is provided on the annular support plate (200) and located on one side of the inspection opening (210).

2. The wheel maintenance platform according to claim 1, characterized in that: The wheel body maintenance platform further comprises a base (500) supported on the ground, the base (500) being U-shaped, the base (500) being arranged in a ring and supported on the outer side of the support seat (100), and a limit position assembly (600) being arranged between the base (500) and the support seat (100); A vertical support arm (530) is fixed on the base (500) at one end away from the opening, and a horizontal support platform (700) is installed on one end of the support arm (530) away from the base (500); the support platform (700) is located on the lower side of the annular support plate (200), and supports and positions the annular support plate (200) from the lower side.

3. The wheel body maintenance platform according to claim 2, characterized in that: The support platform (700) is U-shaped, and two ends of the support platform (700) form positioning plates (710) that are parallel to each other; A positioning groove (711) is provided on the upper side of each positioning plate (710), and the length direction of the positioning groove (711) is parallel to the length direction of the positioning plate (710); Guide pillars (240) are fixed on the lower side of the annular support plate (200) and at both ends of the inspection opening (210), the two guide pillars (240) are parallel to each other, and the two guide pillars (240) can be respectively embedded in the two positioning grooves (711); A plurality of groups of positioning components (720) are arranged on the vertical side of the positioning plate (710), and when the guide column (240) is engaged in the positioning groove (711), the positioning components (720) limit and fix the guide column (240).

4. The wheel body maintenance platform according to claim 3, characterized in that: The positioning assembly (720) comprises a mounting plate (721) fixed to a vertical side of the positioning plate (710); the mounting plate (721) is arranged horizontally; a driving motor (722) is fixed on the upper side of the mounting plate (721); a supporting block (723) and a guiding block (724) are fixedly mounted in sequence on one end of the driving motor (722) close to the positioning plate (710); the supporting block (723) is located between the guiding block (724) and the driving motor (722); A first mounting hole (723a) is provided in the middle of the support block (723), a second mounting hole (724a) is provided in the middle of the guide block (724), a first positioning hole (712) penetrating the positioning groove (711) is provided on the positioning plate (710), and the first mounting hole (723a), the second mounting hole (724a) and the first positioning hole (712) are coaxially arranged; A positioning screw rod (725) is fixedly connected to the output shaft of the driving motor (722); a positioning column (726) is slidably connected between the second mounting hole (724a) and the first positioning hole (712); a first threaded hole (726a) is formed at one end of the positioning column (726) close to the driving motor (722); One end of the positioning screw rod (725) is rotatably connected to the first positioning hole (712), and the other end is threadedly connected to the first threaded hole (726a). When the driving motor (722) controls the positioning screw rod (725) to rotate, the positioning column (726) can pass through the first positioning hole (712) and enter or slide out of the positioning groove (711); The guide column (240) has a rectangular cross-section and is provided with a second positioning hole (241). When the guide column (240) is engaged in the positioning groove (711), the first positioning hole (712) and the second positioning hole (241) can be in a coaxial position. When the first positioning hole (712) and the second positioning hole (241) are in a coaxial position, the positioning column (726) can pass through the first positioning hole (712) and the second positioning hole (241).

5. The wheel body maintenance platform according to claim 4, characterized in that: An arc-shaped groove (713) is provided on a vertical side wall at one end of the positioning groove (711); a pressure sensor (727) is fixed inside the arc-shaped groove (713); and a spherical surface (242) is integrally formed at one end of the guide column (240) close to the arc-shaped groove (713); When the guide column (240) enters the positioning groove (711) and the spherical surface (242) is embedded in the arc groove (713), the spherical surface (242) abuts against the pressure sensor (727), the first positioning hole (712) and the second positioning hole (241) are in a concentric position, and the pressure sensor (727) sends an electrical signal, and the drive motor (722) rotates, so that the positioning screw (725) drives the positioning column (726) to enter the second positioning hole (241).

6. The wheel body maintenance platform according to claim 4, characterized in that: The fixing assembly (400) comprises a plurality of first fixing blocks (410) fixed to the upper side of the hub of the rotating wheel body (800), a second fixing block (420) fixed to the lower side of the annular support plate (200), a step hole (421) being formed on the second fixing block (420), and a fixing hole (230) concentric with the step hole (421) being formed on the annular support plate (200); A limiting hole (411) is provided on one side of the first fixing block (410) close to the second fixing block (420); a second threaded hole (412) is provided at the bottom of the limiting hole (411); a limiting sleeve (430) is slidably connected between the step hole (421) and the limiting hole (411); a limiting ring (431) is integrally formed at one end of the limiting sleeve (430) away from the first fixing block (410); and the limiting ring (431) abuts against the step hole (421); A bolt (440) is slidably disposed in the limiting sleeve (430), one end of the bolt (440) passes through the limiting sleeve (430) and is threadedly connected to the second threaded hole (412), and the other end of the bolt (440) abuts against the limiting ring (431).

7. The wheel body maintenance platform according to claim 2, characterized in that: The limiting assembly (600) comprises a limiting plate (610) rotatably connected to the support seat (100), two limiting plates (610) are provided and are respectively located on two sides of the support seat (100), and the two limiting plates (610) can respectively rotate to a side away from each other; When the limiting plate (610) is rotated to a horizontal position, it can abut against the upper side of the base (500); a limiting block (620) is integrally formed on a side of the limiting plate (610) close to the base (500); two side edges parallel to each other on the base (500) are respectively provided with limiting openings (510); when the base (500) is arranged around the support seat (100), the limiting block (620) can be embedded in the limiting opening (510).

8. The wheel body maintenance platform according to claim 2, characterized in that: Guide wheels (520) are respectively arranged in the middle of the base (500) and on mutually parallel vertical side walls.

9. The wheel body maintenance platform according to claim 2, characterized in that: An escalator (531) is fixedly mounted on the support arm (530).

10. The wheel body maintenance platform according to claim 1, characterized in that: The annular guardrail (300) comprises a plurality of vertical support columns (310) fixed at intervals along the outer side wall of the annular support plate (200), and annular steel bars (320) fixed to the outside of all the vertical support columns (310); a skirting is fixedly provided on the upper side of the annular support plate (200).

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