A runner body maintenance platform

Abstract

The present application relates to the technical field of equipment overhaul platform, particularly relates to a rotating wheel body overhaul platform, which comprises a support seat for supporting a rotating wheel body and a ring-shaped support plate fixedly installed above the rotating wheel body, a middle part of the ring-shaped support plate is formed with an overhaul opening, a ring-shaped guardrail is fixedly arranged on the outer side of the ring-shaped support plate, a fixing assembly is arranged between the rotating wheel body and the ring-shaped support plate, and an operation opening for workers to enter is formed in one side of the ring-shaped support plate and located at the side of the overhaul opening. By using the above-mentioned rotating wheel body overhaul platform, the temporary erection of full scaffolding can be avoided during each overhaul, the overhaul and installation efficiency is greatly improved, and the human cost and time cost are reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of equipment maintenance platform, in particular to a runner body maintenance platform. BACKGROUND

[0002] In a hydropower station, an axial flow turboset is used for power generation work. After the turboset is used for a period of time, it needs to be overhauled to ensure that the axial flow turboset can work normally and stably. During the disassembly and repair process, the maintenance of the runner body is particularly important. The runner body in the prior art is about six meters high. During the disassembly and repair process, the runner body is placed on a specific support seat, and the height of the support seat is 1.5 meters, so that the total height reaches 7.5 meters, which brings difficulties to the disassembly and repair of the runner body.

[0003] In the industry, during the traditional maintenance of the axial flow turboset, when checking and disassembling each part of the runner body and replacing each sealing element, the turboset needs to be completely disassembled before the runner body can be repaired. During the disassembly of the runner body, due to the high height of the runner body, a full scaffold is set up around the runner body, and then the runner body is disassembled. Although this method can complete the maintenance of the runner body, the working platform consumes a large amount of labor cost and time cost during the erection and disassembly process. SUMMARY

[0004] (I) Technical problem to be solved

[0005] In view of the shortcomings of the prior art, the present application provides a runner body maintenance platform, which improves the maintenance and installation efficiency and reduces the labor cost and time cost.

[0006] (II) Technical scheme

[0007] To achieve the above-mentioned purpose, the present application provides a runner body maintenance platform, which comprises a support seat for supporting a runner body and a ring-shaped support plate fixedly installed above the runner body; a maintenance opening is formed in the middle of the ring-shaped support plate; a ring-shaped guardrail is fixedly arranged around the outer side of the ring-shaped support plate; a fixing assembly is arranged between the runner body and the ring-shaped support plate; and an operation opening for workers to enter is formed in one side of the ring-shaped support plate and located at the maintenance opening.

[0008] Preferably, the runner body maintenance platform further comprises a base supported on the ground, the base is U-shaped, and the base is annularly arranged outside the support base, and a limiting assembly is arranged between the base and the support base; a vertical support arm is fixed on the base and away from the opening end, 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 below.

[0009] Preferably, the support platform is U-shaped, and the two ends of the support platform form positioning plates parallel to each other; a positioning groove is formed in the upper side of each positioning plate, and the length direction of the positioning groove is parallel to the length direction of the positioning plate; a guide column is fixed on the lower side of the annular support plate and located at both ends of the maintenance 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 assemblies are arranged on the vertical side of the positioning plate, and when the guide columns are fitted into the positioning grooves, the positioning assemblies limit and fix the guide columns.

[0010] Preferably, the positioning assembly comprises a mounting plate fixed on the vertical side of the positioning plate, the mounting plate is horizontally arranged, a drive motor is fixed on the upper side of the mounting plate, a support block and a guide block are sequentially fixed on the end of the drive motor close to the positioning plate, and the support block is located between the guide block and the drive motor; a first mounting hole is formed in the middle of the support block, a second mounting hole is formed in the middle of the guide block, a first positioning hole is formed in the positioning groove, 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 drive motor; a positioning column is slidably connected between the second mounting hole and the first positioning hole, a first threaded hole is formed in the end of the positioning column close to the drive motor; one end of the positioning screw rod is rotatably connected to the first positioning hole, and the other end is threadedly connected with the first threaded hole, when the drive motor controls the rotation of the positioning screw rod, the positioning column can pass through the first positioning hole and enter or slide out of the positioning groove; the guide column is rectangular in cross section, a second positioning hole is formed 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 arranged, and when the first positioning hole and the second positioning hole are coaxially arranged, the positioning column can pass through the first positioning hole and the second positioning hole.

[0011] Preferably, an arc-shaped slot is formed in the vertical side wall of one end of the positioning slot; a pressure sensor is fixed in the inner side of the arc-shaped slot; a spherical surface is integrally formed on the end of the guide column close to the arc-shaped slot; when the guide column enters the positioning slot and the spherical surface is embedded in the arc-shaped slot, the spherical surface abuts against the pressure sensor, the first positioning hole and the second positioning hole are in concentric positions, and the pressure sensor sends an electric signal; the driving motor rotates to drive the positioning lead screw and the positioning column into the second positioning hole.

[0012] Preferably, the fixing assembly comprises a plurality of first fixing blocks fixed to the upper side of the hub of the runner body, a second fixing block fixed to the lower side of the annular support plate, a stepped hole formed in the second fixing block, and a fixing hole formed in the annular support plate and concentric with the stepped hole; a limiting hole is formed in the side of the first fixing block close to the second fixing block, a second threaded hole is formed in the bottom of the limiting hole, a limiting sleeve is slidably connected in the limiting hole and the stepped hole, a limiting ring is integrally formed on the end of the limiting sleeve away from the first fixing block and 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 with the second threaded hole, and the other end of the bolt abuts against the limiting ring.

[0013] Preferably, the limiting assembly comprises a limiting plate rotatably connected to the support base, the limiting plate is provided with two plates and is located on the two sides of the support base respectively, and the two limiting plates can rotate to the sides away from each other respectively; the limiting plate can abut against the upper side of the base when the limiting plate is rotated to be horizontal, a limiting block is integrally formed on the side of the limiting plate close to the base, limiting openings are respectively formed in the two parallel side edges of the base, and the limiting block can be embedded in the limiting opening when the base is arranged around the support base.

[0014] Preferably, guide wheels are arranged in the middle part of the base and located on the parallel vertical side walls respectively.

[0015] Preferably, a staircase is fixedly installed on the support arm.

[0016] Preferably, the annular guardrail comprises a plurality of vertical support columns fixedly arranged at intervals along the outer side wall of the annular support plate, and an annular reinforcing bar fixed to the outer side of all the vertical support columns; a skirting board is fixedly arranged on the upper side of the annular support plate.

[0017] (Three) beneficial effects

[0018] The application provides a runner body overhauling platform, when the runner body needs to be overhauled, the runner body is supported through the supporting seat, the base and the supporting seat are matched to position, after positioning, the annular supporting plate is supported and fixed through the supporting platform, finally, the runner body and the annular supporting plate are fixed through the fixing assembly. The method can improve the installation efficiency of the runner body and the annular supporting plate, meanwhile, the stability of the annular supporting plate is improved through the mutual connection and positioning between the supporting platform, the annular supporting plate and the runner body, the stability of the runner body in the overhauling process is improved, and the safety of the equipment and the workers is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a schematic view of the runner body overhauling platform of the application;

[0020] Figure 2 It is a schematic view of the annular supporting plate and the annular guardrail;

[0021] Figure 3 It is a schematic view of the base and the supporting platform;

[0022] Figure 4 It is a sectional view of the connecting structure of the annular supporting plate and the runner body;

[0023] Figure 5 It is Figure 4 It is an enlarged view of the structure A;

[0024] Figure 6 It is a sectional view of the connecting structure of the supporting seat and the base;

[0025] Figure 7 It is a schematic view of the installation structure of the annular supporting plate and the supporting platform;

[0026] Figure 8 It is an enlarged view of the structure B; Figure 7

[0027] Figure 9 It is a schematic view of the position of the pressure sensor.

[0028] Markings in the drawings:

[0029] ​100, support seat; 200, annular support plate; 210, access hole; 220, operation hole; 230, fixing hole; 240, guide column; 241, second positioning hole; 242, spherical surface; 300, annular guardrail; 310, vertical support column; 320, annular reinforcing bar; 400, fixing assembly; 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 hole; 520, guide wheel; 530, support arm; 531, escalator; 600, limiting assembly; 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 assembly; 721, mounting plate; 722, driving motor; 723, support block; 723a, first mounting hole; 724, guide block; 724a, second mounting hole; 725, positioning screw; 726, positioning column; 726a, first threaded hole; 727, pressure sensor; 800, runner body. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0031] EMBODIMENT

[0032] The present application provides a runner body maintenance platform, referring to Figures 1-9 , including a support seat 100 for supporting the runner body 800 and an annular support plate 200 fixedly installed above the runner body 800. During maintenance, the runner body 800 is placed on the support seat 100, and the annular support plate 200 is fixed on the upper side of the runner body 800, and the staff performs maintenance on the runner body 800 on the annular support plate 200.

[0033] Specifically, an access hole 210 is formed in the middle of the annular support plate 200; after installation, the middle part of the runner body 800 is exposed from the access hole 210, and the staff disassembles and maintains the runner body 800 from the access hole 210.

[0034] An annular guardrail 300 is fixed around the outer side of the annular support plate 200. Specifically, the annular guardrail 300 includes a plurality of vertical support columns 310 fixed at intervals along the outer side wall of the annular support plate 200 and an annular reinforcing bar 320 fixed to the outer side of all the vertical support columns 310. A skirting line is fixedly arranged on the upper side of the annular support plate 200. The height of the annular guardrail 300 can be set to 1-1.5 m, and the thickness of the annular support plate 200 can use a non-slip pattern steel plate. The specific thickness is not limited as long as it can stably support the workers. An operation opening 220 for the workers to enter is formed on the annular support plate 200 and located on one side of the access opening 210.

[0035] A fixing assembly 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 by the fixing assembly 400.

[0036] Specifically, the fixing assembly 400 includes a plurality of first fixing blocks 410 fixed to the upper side of the hub of the runner body 800, and a second fixing block 420 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 the side of the first fixing block 410 close to the second fixing block 420, and a second threaded hole 412 is formed in the bottom of the limiting hole 411. A limiting sleeve 430 is slidably connected in the limiting hole 411 and the stepped hole 421, and a limiting ring 431 is integrally formed on the 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 with the second threaded hole 412, and the other end of the bolt 440 abuts against the limiting ring 431, i.e. the nut of the bolt 440 abuts against the limiting ring 431. During installation, the fixing and installation can be operated from the upper side of the annular support plate 200. This arrangement can not only connect and fix the two, but also protect the bolt 440 with the hook. It can be used multiple times and can be freely disassembled.

[0037] Further, the runner body 800 maintenance platform further includes a base 500 supported on the ground, the base 500 is U-shaped, and the base 500 is annularly arranged on the outer side of the support base 100. A limiting assembly 600 is arranged between the base 500 and the support base 100 to limit the position of the base 500.

[0038] Specifically, the limiting assembly 600 comprises a limiting plate 610 rotatably connected to the support base 100. The limiting plate 610 is provided with two plates and is located on the two parallel side arms of the support base 100. The two limiting plates 610 can be rotated away from each other, and can be rotated to a horizontal position or vertically attached to the support base 100.

[0039] During installation, if the U-shaped base 500 is enclosed around the support base 100, the length of the limiting plate 610 can abut the upper side of the base 500 when the limiting plate 610 is rotated to the horizontal position. The limiting block 620 is integrally formed on the side of the limiting plate 610 close to the base 500. The limiting port 510 is provided on the two parallel side edges of the base 500. When the base 500 is arranged around the support base 100, the limiting block 620 can be fitted into the limiting port 510. After limiting, the fixing assembly 400 can fix the rotating wheel body 800 and the annular support plate 200.

[0040] Further, in order to facilitate the installation and movement of the base 500 and the support base 100, and to reduce the mutual influence during installation and movement, guide wheels 520 are arranged in the middle of the base 500 and on the parallel vertical side walls. During installation, the guide wheels 520 can abut 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.

[0041] Further, a vertical support arm 530 is fixed to the base 500 away from the opening end. 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 rotating wheel body 800 are connected and positioned with each other, which improves the stability of the annular support plate 200 and the stability of the rotating wheel body 800 during maintenance, and ensures the safety of the equipment and the workers.

[0042] Specifically, the support platform 700 is in the shape of a U, and the two 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.

[0043] A guide column 240 is fixed to the lower side of the annular support plate 200 and located at both ends of the maintenance 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 fitted into the two positioning grooves 711, respectively.

[0044] A plurality of positioning assemblies 720 are arranged on the vertical side of the positioning plate 710, which limit and fix the guide column 240 when the guide column 240 is embedded in the positioning groove 711.

[0045] In use, the annular support plate 200 is first supported and fixed by the positioning plate 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 a role in auxiliary support of the annular support plate 200, and then 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.

[0046] During installation, the positioning assembly 720 is arranged to quickly fix the positioning plate 710 and the annular support plate 200.

[0047] Specifically, the positioning assembly 720 includes a mounting plate 721 fixed to the vertical side of the positioning plate 710, which is horizontally arranged. A drive motor 722 is fixed on the upper side of the mounting plate 721. A support block 723 and a guide block 724 are fixed to the end of the drive motor 722 close to the positioning plate 710 in sequence. The support block 723 is located between the guide block 724 and the drive motor 722.

[0048] A first mounting hole 723a is formed in the middle of the support block 723, and a second mounting hole 724a is formed in the middle of the guide block 724. A first positioning hole 712 is formed in the positioning plate 710 and penetrates the positioning groove 711. The first mounting hole 723a, the second mounting hole 724a, and the first positioning hole 712 are coaxially arranged.

[0049] A positioning screw 725 is fixedly connected to the output shaft of the drive 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 in the end of the positioning column 726 close to the drive motor 722. One end of the positioning screw 725 is rotationally connected in the first positioning hole 712, and the other end is threadedly connected with the first threaded hole 726a. When the drive motor 722 controls the positioning screw 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.

[0050] The guide column 240 has a rectangular cross section, and a second positioning hole 241 is formed in the guide column 240. When the guide column 240 is embedded in the positioning groove 711, the first positioning hole 712 and the second positioning hole 241 can be coaxially arranged. When the first positioning hole 712 and the second positioning hole 241 are coaxially arranged, the positioning column 726 can pass through the first positioning hole 712 and the second positioning hole 241.

[0051] Better, an arc-shaped slot 713 is formed on the vertical side wall of one end of the positioning slot 711; a pressure sensor 727 is fixed inside the arc-shaped slot 713; the guide column 240 is integrally formed with a spherical surface 242 at one end close to the arc-shaped slot 713; when the guide column 240 enters the positioning slot 711, the spherical surface 242 is embedded in the arc-shaped slot 713, and 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 concentric position, and the pressure sensor 727 sends an electric signal to drive the motor 722 to rotate, so that the positioning lead screw 725 drives 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 column 240 are locked. When it is needed to separate, the control switch outside is controlled to drive the motor 722 to rotate reversely, so that the positioning lead screw 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 column 240 is completed.

[0052] The support arm 530 is fixedly installed with a ladder 531. When the operator is performing maintenance, he can go up and down the annular support plate 200 through the ladder 531.

[0053] When the runner body 800 needs to be maintained, the disassembled runner body 800 is first placed on the support seat 100, the base 500 is controlled to surround the support seat 100, and the support seat 100 is moved to a proper position, and the limiting assembly 600 is controlled to limit and fix the base 500 and the support seat 100. Then, the annular support plate 200 is placed on the support platform 700, and the guide column 240 is embedded in the positioning slot 711 on the positioning plate 710 by moving, when the spherical surface 242 at the end of the guide column 240 abuts against the pressure sensor 727, the positioning assembly 720 controls to fix the annular support plate 200 and the support platform 700, after fixing, the worker fixes the runner body 800 from the upper side of the annular support platform. Further, the support platform 700, the annular support plate 200 and the runner body 800 are connected and positioned with each other, that is, the stability of the annular support plate 200 is improved, the stability of the runner body 800 during maintenance is improved, and the safety of the equipment and the worker is ensured.

[0054] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", "front", "back" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0055] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected, it can be mechanically connected, or it can be electrically connected, it can be directly connected, or it can be indirectly connected through an intermediate medium, it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances. The embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0056] The above-described embodiments only express the implementation of the present application, which is described in detail and specifically, but it cannot be understood as a limitation on the scope of the patent of the present application. It should be noted that for those skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are all within the scope of protection of the present application. Therefore, the scope of protection of the patent of the present application should be subject to the appended claims.

Claims

1. A runner body access platform, characterized by: The support seat (100) is used for supporting the rotating body (800), and the annular support plate (200) is fixedly installed above the rotating body (800); The middle part of the annular support plate (200) is formed with an access hole (210); an annular guardrail (300) is fixedly installed on the outer side of the annular support plate (200); the fixed assembly (400) is arranged between the rotating body (800) and the annular support plate (200); the operating hole (220) for the workers to enter is formed on the annular support plate (200) and located on one side of the access hole (210); The rotating body access platform further comprises the base (500) supported on the ground, the base (500) is in a U shape, the base (500) is annularly arranged on the outer side of the support seat (100), and the limiting assembly (600) is arranged between the base (500) and the support seat (100); The vertical support arm (530) is fixed on the base (500) and away from the operating hole, the horizontal support platform (700) is installed on the 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.

2. A runner service platform according to claim 1, wherein: The support platform (700) is in a U shape, and the two ends of the support platform (700) are formed with the positioning plates (710) parallel to each other; The positioning grooves (711) are formed on the upper sides of the positioning plates (710), and the length directions of the positioning grooves (711) are parallel to the length directions of the positioning plates (710); The guide columns (240) are fixed on the lower side of the annular support plate (200) and located at the two ends of the access hole (210), the two guide columns (240) are parallel to each other, and the two guide columns (240) can be respectively embedded in the two positioning grooves (711); The positioning assembly (720) is arranged on the vertical side of the positioning plate (710), when the guide column (240) is embedded in the positioning groove (711), the positioning assembly (720) limits and fixes the guide column (240).

3. A runner service platform according to claim 2, wherein: The positioning assembly (720) comprises the mounting plate (721) fixed on the vertical side of the positioning plate (710), the mounting plate (721) is horizontally arranged, the driving motor (722) is fixed on the upper side of the mounting plate (721), the support block (723) and the guide block (724) are sequentially fixed on the end of the driving motor (722) close to the positioning plate (710), and the support block (723) is located between the guide block (724) and the driving motor (722). The middle part of the support block (723) is provided with a first mounting hole (723a), the middle part of the guide block (724) is provided with a second mounting hole (724a), and the positioning plate (710) is provided with a first positioning hole (712) penetrating a positioning groove (711); 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), and the positioning column (726) is provided with a first threaded hole (726a) at one end 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 with the first threaded hole (726a); when the driving motor (722) controls the rotation of the positioning screw rod (725), 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) is rectangular in cross section, and the guide column (240) is provided with a second positioning hole (241); when the guide column (240) is embedded in the positioning groove (711), the first positioning hole (712) and the second positioning hole (241) can be coaxially arranged; when the first positioning hole (712) and the second positioning hole (241) are coaxially arranged, the positioning column (726) can pass through the first positioning hole (712) and the second positioning hole (241).

4. A runner service platform according to claim 3, wherein: An arc-shaped groove (713) is formed in the vertical side wall at one end in the positioning groove (711); a pressure sensor (727) is fixedly arranged in the arc-shaped groove (713); and the guide column (240) is integrally formed with a spherical surface (242) at one end 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-shaped groove (713), the spherical surface (242) abuts against the pressure sensor (727), the first positioning hole (712) and the second positioning hole (241) are coaxially arranged, and the pressure sensor (727) sends an electric signal; 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).

5. A runner service platform according to claim 3, wherein: The fixing assembly (400) comprises 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) fixed to the lower side of the annular support plate (200), a stepped hole (421) formed in the second fixing block (420), and a fixing hole (230) coaxially arranged with the stepped hole (421) formed in the annular support plate (200). The first fixed block (410) is provided with a limiting hole (411) near one side of the second fixed block (420), the bottom of the limiting hole (411) is provided with a second threaded hole (412), the stepped hole (421) and the limiting hole (411) are slidably connected with a limiting sleeve (430), one end of the limiting sleeve (430) away from the first fixed block (410) is integrally formed with a limiting ring (431), 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) penetrates through the limiting sleeve (430) and is threadedly connected with the second threaded hole (412), and the other end of the bolt (440) abuts against the limiting ring (431).

6. A runner service platform according to claim 1, wherein: The limiting assembly (600) comprises limiting plates (610) rotatably connected to the support base (100), the limiting plates (610) are provided with two plates and are respectively located on two sides of the support base (100), and the two limiting plates (610) can be respectively rotated to sides away from each other; When the limiting plate (610) is rotated to be horizontal, the limiting plate (610) can abut against the upper side of the base (500), the limiting plate (610) is integrally formed with a limiting block (620) on the side close to the base (500), the base (500) is provided with limiting openings (510) on two parallel side edges, when the base (500) is arranged around the support base (100), the limiting block (620) can be embedded in the limiting opening (510).

7. A runner service platform according to claim 1 wherein: The middle part of the base (500) and the vertical side walls parallel to each other are respectively provided with guide wheels (520).

8. A runner service platform according to claim 1, wherein: The support arm (530) is fixedly installed with a staircase (531).

9. A runner service platform according to claim 1, wherein: The annular guardrail (300) comprises 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 reinforcing steel (320) fixed to the outer side of all the vertical support columns (310); and a skirting line is fixedly arranged on the upper side of the annular support plate (200).

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