Prestress tension anti-falling lifting device

Abstract

The invention provides a prestress tension anti-falling lifting device. The prestress tension anti-falling lifting device comprises a bearing platform, a lifting mechanism and an anti-falling mechanism. The lifting mechanism comprises a connecting frame, rotating shafts arranged on the two sides of the connecting frame and rotationally connected with the connecting frame, a driving motor arranged on the connecting frame to drive the rotating shafts to rotate, and driving gears coaxially arranged at the two ends of the rotating shafts in a sleeving mode and meshed with racks formed on the outer sides of the guide rails. The anti-falling mechanism comprises a shell arranged on the connecting frame and penetrated by the rotating shaft, an anti-falling device arranged on the shell, and a transmission gear arranged in the shell and coaxially arranged on the rotating shaft in a sleeving mode. And the falling protector is provided with a brake gear which is meshed with the transmission gear to limit the rotation of the rotating shaft. By means of the anti-falling mechanism arranged on the lifting mechanism, the problem that in the prior art, due to swing of the supporting frame, in the operation process, anti-falling rolling wheels abut against the racks, and normal lifting of the lifting mechanism is affected is thoroughly solved, and potential safety hazards are reduced.

Description

Technical Field

[0001] The invention relates to the technical field of building construction machinery, and in particular to a prestressed tensioning anti-falling lifting device. Background Art

[0002] During the construction of a nuclear power plant, the nuclear island building (i.e., the inner building, also known as the containment) is the core part of the nuclear power plant, which contains key equipment such as the reactor and steam generator. The main structure of the containment is usually cast with high-strength concrete to ensure that the containment can provide sufficient structural strength to protect the internal equipment. The containment is usually divided into a cylindrical structure and a hemispherical dome structure. The cylindrical structure is perpendicular to the ground and forms a 90-degree angle with the horizontal plane. The buttresses are set in the containment and protrude from the shell wall, and the buttresses extend to the hemispherical dome. The function of the buttresses is to anchor the horizontal prestressed steel bundles of the containment.

[0003] In order to enhance the safety and stability of the containment concrete structure, prestressed tensioning technology is usually used to apply pre-compressive stress before the containment structure is subjected to external loads, thereby improving the bending resistance and rigidity of the structure and increasing the durability of the structure. During the prestressed tensioning construction of the containment, a working platform for installing tensioning equipment such as jacks needs to be built along the facade of the containment buttresses to ensure that the staff can perform tensioning operations safely and effectively. Prior to this, it is necessary to pre-assemble guide rails for the movement of the working platform on the facade of the buttresses of the containment. In the existing construction platform, the guide rails are usually fixed to the buttresses of the containment only through embedded parts and two are arranged at intervals along the lateral direction. Specifically, the guide rails of the buttresses arranged on the cylinder of the containment are perpendicular to the horizontal plane, and the guide rails of the buttresses arranged on the hemispherical dome of the containment are arranged along the curved surface of the hemispherical dome.

[0004] The Chinese utility model patent with announcement number CN212984601U discloses a prestressed platform anti-fall auxiliary device, including a fall arrester, and also includes: a connecting box, the fall arrester is fixed on the connecting box, and the anti-fall gear of the fall arrester is located inside the connecting box; the transmission gear is rotatably installed on the connecting box and meshes with the anti-fall gear; the anti-fall shaft is fixedly connected to the transmission gear; the guide rail gear is fixed on the anti-fall shaft and meshes with the rack on the guide rail; the anti-fall frame is movably sleeved on the guide rail, and the anti-fall shaft is rotatably installed on the anti-fall frame; the anti-fall roller is rotatably installed in the anti-fall frame, and is respectively located on both sides of the guide rail, for limiting the anti-fall frame to be lifted and lowered on the guide rail; the support frame is movably installed on the anti-fall shaft and movably connected to the driving shaft of the track climber, and the connecting box is fixed on the support frame.

[0005] The prestressed platform anti-fall auxiliary device in the above-mentioned prior art, the track climber drives the anti-fall device to rise and fall through the driving shaft and the support frame, the track climber drives the anti-fall device to rise through the driving shaft and the support frame, which can be understood as the track climber pulls the support frame through the driving shaft to drive the anti-fall device to move upward, the track climber drives the anti-fall device to descend through the driving shaft and the support frame, which can be understood as the track climber pushes the support frame through the driving shaft to drive the anti-fall device to move downward, the anti-fall shaft and the anti-fall roller, the guide rail gear, and the anti-fall frame are driven to rise and fall in a passive manner by the support frame, and at the same time the guide rail gear is engaged with the rack on the guide rail to drive the anti-fall shaft to rotate. Since the support frame is movably connected to the driving shaft of the rail climber and the support frame is movably installed on the anti-fall shaft, when the driving shaft pushes the support frame to drive the anti-fall device to move downward, due to the thrust of the support frame, one end of the support frame connected to the anti-fall shaft will be lifted up, causing the support frame to swing, resulting in the guide rail gear center distance (the distance between the guide rail gear center and the rack on the guide rail) to be too large, thereby causing top tooth or other mechanical failures, affecting the normal operation of the lifting platform, and posing a safety hazard.

[0006] In view of this, it is necessary to improve the prestressed platform anti-falling auxiliary device in the prior art to solve the above problems. Summary of the invention

[0007] The purpose of the present invention is to disclose a prestressed tensioning anti-fall lifting device, which is used to solve the many defects existing in the prestressed platform anti-fall auxiliary device in the prior art, especially to completely avoid the occurrence of top teeth or other mechanical failures between the anti-fall roller and the rack, and ensure the normal lifting of the lifting mechanism.

[0008] To achieve the above-mentioned purpose, the present invention provides a prestressed tension anti-fall lifting device, comprising: a load-bearing platform, a lifting mechanism disposed at the bottom of the load-bearing platform to drive the load-bearing platform to rise and fall, and an anti-fall mechanism disposed on the lifting mechanism;

[0009] The lifting mechanism comprises: a connecting frame, a rotating shaft arranged at both sides of the connecting frame and rotatably connected to the connecting frame, a driving motor arranged at the connecting frame to drive the rotating shaft to rotate, and a driving gear coaxially sleeved at both ends of the rotating shaft and meshing with a rack formed on the outer side of the guide rail;

[0010] The anti-falling mechanism comprises: a shell arranged on the connecting frame and penetrated by the rotating shaft, an anti-falling device arranged on the shell, and a transmission gear arranged inside the shell and coaxially sleeved on the rotating shaft;

[0011] The fall arrester is configured with a brake gear meshing with the transmission gear to limit the rotation of the rotation shaft.

[0012] As a further improvement of the present invention, the transmission gear is constructed to have a sleeve portion formed outside the rotating shaft, and the sleeve portion extends radially outward to form a gear portion meshing with the brake gear;

[0013] The inner peripheral wall of the sleeve portion is recessed to form a limiting groove, and the rotating shaft is constructed to form a rotating block extending into the limiting groove.

[0014] As a further improvement of the present invention, the anti-fall mechanism also includes: a speed-increasing gear disposed within the shell and rotatably connected to the shell, the speed-increasing gear being formed between the transmission gear and the braking gear and meshing with the transmission gear and the braking gear.

[0015] As a further improvement of the present invention, the anti-fall mechanism also includes: a rotating support member coaxially sleeved on the sleeve portion, the inner ring of the rotating support member is fixedly connected to the sleeve portion, and an end cover is arranged on the shell and fixedly connected to the outer ring of the rotating support member, the end cover is penetrated by the rotating shaft and radially separated from the rotating shaft.

[0016] As a further improvement of the present invention, the lifting mechanism is hinged to one side of the bottom of the carrying platform close to the guide rail;

[0017] The prestressed tensioning anti-fall lifting device also includes: a leveling mechanism, which is configured on the lifting mechanism and hinged to the side of the bottom of the bearing platform opposite to the guide rail. The leveling mechanism drives the bearing platform to rotate relative to the lifting mechanism through a telescopic action to adjust the bearing platform to a horizontal posture.

[0018] As a further improvement of the present invention, the connecting frame is hinged to one side of the bottom of the bearing platform close to the guide rail;

[0019] The leveling mechanism includes: a third telescopic unit configured on the connecting frame, a fixed end of the third telescopic unit is hinged to a side of the connecting frame away from the bearing platform, and a telescopic rod of the third telescopic unit is hinged to a side of the bearing platform opposite to the guide rail.

[0020] As a further improvement of the present invention, the connecting frame comprises: a cross bar for mounting the driving motor, a connecting frame arranged at both ends of the cross bar in the length direction and penetrated by the rotating shaft, the rotating shaft is rotatably connected to the connecting frame, and the driving gear is formed in the connecting frame;

[0021] The lifting mechanism further comprises: a plurality of guide wheels symmetrically arranged inside the connecting frame and rotatably connected to the connecting frame.

[0022] As a further improvement of the present invention, the connection frame comprises: two connection plates formed on both sides of the guide rail, and a fixing plate arranged between the two connection plates;

[0023] The cross bar passes through the connecting plate on the inner side of the guide rail along its length direction and is connected to the connecting plate on the outer side of the guide rail;

[0024] The rotating shaft passes through the connecting plate along its length direction and is rotatably connected to the connecting plate. The driving gear is formed between the two connecting plates and meshes with the rack formed on the outer side of the guide rail. The guide wheel is rotatably connected to the opposite inner side walls of the two connecting plates.

[0025] As a further improvement of the present invention, the connecting plate extends toward the carrying platform to form an extended hinge, and the carrying platform is constructed with a first hinge seat hinged to the extended hinge;

[0026] One end of the connecting plate away from the extension hinge extends along a side opposite to the guide rail to form a support hinge, and the support hinge is hinged to the fixed end of the third telescopic unit;

[0027] The carrying platform is constructed with a second hinge seat hinged to the telescopic rod of the third telescopic unit.

[0028] As a further improvement of the present invention, the prestressed tension anti-fall lifting device also includes: a flip guardrail hinged to the bearing platform, and auxiliary platforms arranged on both sides of the bearing platform.

[0029] Compared with the prior art, the beneficial effect of the present invention is that when an emergency occurs in the prestressed tension anti-fall lifting device, the anti-fall device is activated when detecting the emergency, and the anti-fall device quickly locks the brake gear to limit the rotation of the transmission gear through the brake gear, prevent the rotation of the rotating shaft, and simultaneously prevent the driving gears at both ends of the rotating shaft from continuing to move along the rack formed on the outer side of the guide rail, so as to achieve simultaneous locking of both sides of the rotating shaft during emergency braking, and prevent the prestressed tension anti-fall lifting device from falling out of control. By configuring the anti-fall mechanism on the lifting mechanism, and removing the anti-fall shaft and anti-fall roller, guide rail gear, anti-fall frame and other components contained in the prestressed platform anti-fall auxiliary device in the prior art that are passively driven by the support frame for lifting, not only can the anti-fall function be achieved, but also the problem that the anti-fall roller and the rack are top-toothed during operation due to the swing of the support frame in the prior art, which affects the normal lifting of the lifting mechanism, can be completely avoided, so as to reduce safety hazards, simplify the overall structure of the prestressed tension anti-fall lifting device, and improve the stability and reliability of the prestressed tension anti-fall lifting device. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1It is an overall schematic diagram of the prestressed tension anti-fall lifting device disclosed by the present invention;

[0031] Figure 2 It is an overall schematic diagram of the prestressed tension anti-fall lifting device from another perspective;

[0032] Figure 3 This is the front view of the prestressed tension anti-fall lifting device;

[0033] Figure 4 for Figure 3 The partial enlarged view shown in the dotted box D;

[0034] Figure 5 for Figure 4 A cross-sectional view of the rotating shaft and the transmission gear cut along the AA axis, wherein the transmission gear is meshed with the brake gear;

[0035] Figure 6 is a cross-sectional view of a rotating shaft and a transmission gear in another embodiment, wherein a speed increasing gear is meshed between the transmission gear and the brake gear;

[0036] Figure 7 for Figure 6 A cross-sectional view of the rotating shaft and the transmission gear cut along the BB axis;

[0037] Figure 8 A side view of a guide rail of a prestressed tensioned anti-fall lifting device located on the outer facade of a cylinder buttress column of a containment vessel;

[0038] Fig. 9 Side view of the guide rails for the prestressed tensioned fall arrester to climb to the buttresses on the outer facade of the hemispherical dome of the containment vessel. DETAILED DESCRIPTION

[0039] The present invention is described in detail below in conjunction with the various embodiments shown in the accompanying drawings, but it should be noted that these embodiments are not limitations of the present invention, and any equivalent transformations or substitutions in functions, methods, or structures made by ordinary technicians in the field based on these embodiments are all within the scope of protection of the present invention.

[0040] Please refer to Figures 1 to 9 A specific implementation of a prestressed tension anti-fall lifting device (hereinafter referred to as "lifting device 100") is disclosed.

[0041] It should be noted that the containment is usually divided into a cylinder and a hemispherical dome. The cylinder is perpendicular to the ground and forms a 90-degree angle with the horizontal plane. The buttress is arranged in the containment and protrudes from the outer wall of the containment. The buttress extends from the cylinder to the hemispherical dome. In this embodiment, the guide rail 200 is installed on the outer facade (not shown) of the buttress (not shown) through an embedded part (not shown) and extends in the horizontal direction ( Figure 4 Two are set at intervals in the direction shown by the X-axis. Figure 8 As shown, the guide rail 200 provided on the buttress column (not shown) of the cylinder is perpendicular to the horizontal plane H, and the lifting device 100 performs lifting and lowering motion along the guide rail 200 in the vertical plane. Fig. 9 As shown, the guide rail 200a provided on the buttress (not shown) of the hemispherical dome is arranged along the curved surface of the hemispherical dome, and the lifting device 100 performs lifting and lowering motion along the guide rail 200a on the curved surface of the buttress of the hemispherical dome.

[0042] Ginseng Figure 1 and Figure 2 As shown, in this embodiment, the lifting device 100 includes: a load-bearing platform 71, a lifting mechanism 72 disposed at the bottom of the load-bearing platform 71 to drive the load-bearing platform 71 to rise and fall, and an anti-fall mechanism 3 disposed on the lifting mechanism 72. The load-bearing platform 71 is used for workers to stand and for construction equipment to be stored. The lifting mechanism 72 provides power to drive the load-bearing platform 71 to move up and down along the guide rail 200. The anti-fall mechanism 3 is disposed on the lifting mechanism 72, and is used to prevent the lifting device 100 from falling out of control in an emergency (such as stalling, falling), thereby ensuring the safety of workers and construction equipment.

[0043] Ginseng Figure 3 and Figure 4 As shown, the lifting mechanism 72 includes: a connecting frame 721, a rotating shaft 722 disposed on both sides of the connecting frame 721 and rotatably connected to the connecting frame 721, a driving motor 723 disposed on the connecting frame 721 to drive the rotating shaft 722 to rotate, and a driving gear 724 coaxially sleeved on both ends of the rotating shaft 722 and formed with a rack (not shown) on the outer side of the guide rail 200. The connecting frame 721 serves as the main frame of the lifting mechanism 72, and is used to support and fix other components such as the rotating shaft 722 and the driving motor 723. Preferably, the lifting mechanism 72 includes two rotating shafts 722, and the two rotating shafts 722 are symmetrically disposed on the upper and lower sides of the connecting frame 721. The driving motor 723 drives the rotating shaft 722 to rotate relative to the connecting frame 721, and the rotating shaft 722 synchronously drives the driving gears 724 at both ends to rotate. The driving gears 724 at both ends of the rotating shaft 722 are respectively engaged with the racks on the outside of the guide rail 200, so that the driving gears 724 move along the racks on the outside of the guide rail 200, so as to drive the supporting platform 71 to move up and down along the guide rail 200.

[0044] Ginseng Figure 4 and Figure 5As shown, the anti-fall mechanism 3 includes: a housing 31 disposed on the connecting frame 721 and penetrated by the rotating shaft 722, an anti-fall device 32 disposed on the housing 31, and a transmission gear 33 disposed inside the housing 31 and coaxially sleeved on the rotating shaft 722; the anti-fall device 32 is constructed with a brake gear 34 that meshes with the transmission gear 33 to limit the rotation of the rotating shaft 722. Under normal working conditions, the driving motor 723 drives the driving gear 724 to move along the rack through the rotating shaft 722 to drive the lifting device 100 to lift, and the rotating shaft 722 synchronously drives the transmission gear 33 to rotate, so that the transmission gear 33 drives the brake gear 34 to rotate. When an emergency occurs in the lifting device 100, the transmission gear 33 drives the brake gear 34 to rotate rapidly. The anti-fall device 32 is activated when detecting the emergency situation. The anti-fall device 32 quickly locks the brake gear 34. Since the brake gear 34 is meshed with the transmission gear 33, the transmission gear 33 is limited to rotate through the brake gear 34, thereby preventing the rotation of the rotating shaft 722 and simultaneously preventing the driving gears 724 at both ends of the rotating shaft 722 from continuing to move along the rack, so as to achieve simultaneous locking of both sides of the rotating shaft 722 during emergency braking and prevent the lifting device 100 from falling out of control.

[0045] This embodiment configures the anti-fall mechanism 3 on the lifting mechanism 72 and removes the anti-fall shaft, anti-fall roller, guide rail gear, anti-fall frame and other components contained in the prestressed platform anti-fall auxiliary device in the prior art that are passively driven by the support frame for lifting. It can not only achieve the anti-fall function, but also completely avoid the problem in the prior art that due to the swing of the support frame, the anti-fall roller and the rack will have top teeth or other mechanical failures during operation, which affects the normal lifting of the lifting device 100, thereby reducing safety hazards, simplifying the overall structure of the lifting device 100, and improving the stability and reliability of the lifting device 100.

[0046] Exemplarily, the fall arrester 32 is constructed with a sensing shaft 321 extending into the housing 31, and the brake gear 34 is fixedly arranged outside the sensing shaft 321. The sensing shaft 321 rotates synchronously with the brake gear 34. The fall arrester 32 is activated when an emergency is detected, and the brake gear 34 is prevented from rotating by quickly locking the sensing shaft 321. It should be noted that the specific structure of the fall arrester 32 in this embodiment is a prior art, and can be a mechanical, electromagnetic or other type of braking device, which will not be described in detail here, as long as it can quickly lock the sensing shaft 321 to prevent the brake gear 34 from rotating when an emergency is detected.

[0047] Ginseng Figure 4As shown, in this embodiment, preferably, the transmission gear 33 is sleeved on the outer side of the rotating shaft 722a at the bottom of the connecting frame 721. In an emergency, the braking mechanism can be quickly triggered and the braking gear 34 can be locked to prevent the rotating shaft 722a from rotating, thereby reducing the uncontrolled falling distance of the lifting device 100. In addition, the available space of the lifting device 100 can be fully utilized to avoid increasing the overall volume and maintain the compactness of the device.

[0048] Ginseng Figure 6 and Figure 7 As shown, the transmission gear 33 is constructed to have a sleeve portion 331 formed on the outside of the rotating shaft 722, and the sleeve portion 331 extends radially outward to form a gear portion 332 meshed with the brake gear 34; the inner circumferential wall of the sleeve portion 331 is recessed to form a limit groove 3311, and the rotating shaft 722 is constructed to have a rotating block 7221 extending into the limit groove 3311. The cooperation between the rotating block 7221 and the limit groove 3311 makes the connection between the rotating shaft 722 and the transmission gear 33 more secure, so as to prevent the rotating shaft 722 and the transmission gear 33 from loosening or slipping during the rotation process. In addition, when the anti-fall device 32 is started, the brake gear 34 is meshed with the gear portion 332, so that the rotation of the brake gear 34 can be accurately transmitted to the transmission gear 33 to prevent the rotating shaft 722 from rotating, thereby ensuring the timeliness of the brake gear 34 braking the rotating shaft 722, and avoiding the increase of the falling distance of the lifting device 100 due to untimely braking.

[0049] Ginseng Figure 6 and Figure 7 As shown, the anti-fall mechanism 3 also includes: a speed-increasing gear 35 which is arranged inside the housing 31 and is rotatably connected to the housing 31. The speed-increasing gear 35 is formed between the transmission gear 33 and the brake gear 34 and meshes with the transmission gear 33 and the brake gear 34. The speed-increasing gear 35 can ensure the synchronous meshing between the transmission gear 33 and the brake gear 34, avoid the situation of slipping or incomplete meshing between the transmission gear 33 and the brake gear 34 during the emergency braking process, and make the emergency braking process smoother, which can reduce the impact during the emergency braking. And the speed-increasing gear 35 can increase the rotation speed of the brake gear 34 relative to the transmission gear 33, thereby accelerating the response speed of the anti-fall device 32 to detect the stall of the rotating shaft 722, so as to quickly lock the brake gear 34 to prevent the rotating shaft 722 from rotating, further reduce the uncontrolled falling distance of the lifting device 100, and make the emergency braking more rapid and effective. Preferably, two groups of speed-increasing gears 35 are symmetrically arranged on both sides of the brake gear 34. When the anti-fall mechanism 3 is started, it can ensure that the braking effect on both sides of the transmission gear 33 during emergency braking is uniform and consistent, and improve the stability during the emergency braking process.

[0050] Ginseng Figure 7As shown, the anti-fall mechanism 3 also includes: a rotating support member 36 coaxially sleeved on the sleeve portion 331, the inner ring of the rotating support member 36 is fixedly connected to the sleeve portion 331, and an end cover 37 is arranged on the housing 31 and fixedly connected to the outer ring of the rotating support member 36, and the end cover 37 is penetrated by the rotating shaft 722 and is radially separated from the rotating shaft 722. The rotating support member 36 (such as a bearing) is used to support the transmission gear 33 to rotate stably on the rotating shaft 722. The end cover 37 is used to fix the outer ring of the rotating support member 36 to enhance the stability of the overall structure of the anti-fall mechanism 3 and prevent the transmission gear 33 from shaking or deflecting when rotating at high speed. The rotating shaft 722 and the end cover 37 are radially separated to reduce unnecessary friction.

[0051] Ginseng Figure 1 and Figure 4 As shown, the lifting mechanism 72 is hinged to the side of the bottom of the carrying platform 71 close to the guide rail 200; the lifting device 100 also includes: a leveling mechanism 75, the leveling mechanism 75 is configured on the lifting mechanism 72 and hinged to the side of the bottom of the carrying platform 71 opposite to the guide rail 200, and the leveling mechanism 75 drives the carrying platform 71 to rotate relative to the lifting mechanism 72 through a telescopic action to adjust the carrying platform 71 to a horizontal posture. By hingedly connecting the lifting mechanism 72 to the side of the bottom of the carrying platform 71 close to the guide rail 200, the connection point between the lifting mechanism 72 and the carrying platform 71 is close to the guide rail 200, which helps the lifting mechanism 72 to transmit power to the carrying platform 71 more directly, so as to reduce energy loss and improve lifting efficiency. By hingedly connecting the leveling mechanism 75 to the side of the bottom of the carrying platform 71 opposite to the guide rail 200, the hinge position of the carrying platform 71 to the leveling mechanism 75 opposite to the guide rail 200 helps the leveling mechanism 75 to more effectively transmit the telescopic torque to the carrying platform 71, ensuring that the carrying platform 71 always maintains a horizontal posture at different positions.

[0052] When the lifting device 100 is lifted and lowered along the guide rail 200 of the buttress column of the cylinder, the lifting mechanism 72 is hinged to the carrying platform 71, and the leveling mechanism 75 drives the carrying platform 71 to rotate relative to the lifting mechanism 72 through a telescopic action until the carrying platform 71 is adjusted to Figure 8 The horizontal posture parallel to the horizontal plane H shown in the figure, and the leveling mechanism 75 is used to control the carrying platform 71 to always maintain a horizontal posture during the working process, so that the lifting mechanism 72 ensures the horizontal accuracy of the carrying platform 71 when driving the carrying platform 71 to perform lifting movement along the guide rail 200.

[0053] When the lifting device 100 climbs to the guide rail 200a of the buttress column of the hemispherical dome, the carrying platform 71 will tilt relative to the horizontal plane H and change to an inclined posture (this state is not shown). The lifting mechanism 72 is hinged to the carrying platform 71, and the leveling mechanism 75 drives the carrying platform 71 to rotate relative to the lifting mechanism 72 through a telescopic action, so as to adjust the carrying platform 71 to the following state: Fig. 9 The horizontal posture parallel to the horizontal plane H shown in the figure enables the load-bearing platform 71 to adapt to the change of the curvature of the guide rail 200a, avoiding the load-bearing platform 71 from tilting relative to the horizontal plane H due to the change of the curvature of the guide rail 200a, and controlling the load-bearing platform 71 to always maintain a horizontal posture during operation through the leveling mechanism 75, thereby ensuring that the lifting device 100 remains stable and balanced during the climbing process, preventing the equipment from slipping or the operator from standing unstable due to the tilt of the load-bearing platform 71, thereby improving operational safety and work efficiency.

[0054] Ginseng Figure 2 and Figure 4 and Figure 7 and Figure 8 As shown, the connecting frame 721 is hinged to the side of the bottom of the carrying platform 71 close to the guide rail 200; the leveling mechanism 75 includes: a third telescopic unit 751 configured on the connecting frame 721, a fixed end (not shown) of the third telescopic unit 751 is hinged to the side of the connecting frame 721 away from the carrying platform 71, and a telescopic rod 7511 of the third telescopic unit 751 is hinged to the side of the carrying platform 71 opposite to the guide rail 200. By hingedly connecting the connecting frame 721 to the side of the bottom of the carrying platform 71 close to the guide rail 200, the connection point between the connecting frame 721 and the carrying platform 71 is close to the guide rail 200, which helps the lifting mechanism 72 to transmit power to the carrying platform 71 more directly, thereby reducing energy loss and improving lifting efficiency. By hingedly connecting the fixed end of the third telescopic unit 751 to the side of the connecting frame 721 away from the carrying platform 71, the connecting frame 721 provides a support position away from the carrying platform 71 for the fixed end of the third telescopic unit 751, which helps the third telescopic unit 751 to more effectively transmit the telescopic torque to the carrying platform 71, ensuring that the leveling mechanism 75 can accurately control the horizontal posture of the carrying platform 71. By hingedly connecting the telescopic rod 7511 of the third telescopic unit 751 to the side of the carrying platform 71 opposite to the guide rail 200, the carrying platform 71 provides a hinged position opposite to the guide rail 200 for the telescopic rod 7511 of the third telescopic unit 751, which helps the third telescopic unit 751 to more effectively transmit the telescopic torque to the carrying platform 71, ensuring that the carrying platform 71 always maintains a horizontal posture at different positions.

[0055] When the lifting device 100 is lifted and lowered along the guide rail 200 of the buttress column of the cylinder, the third telescopic unit 751 is hinged to the bottom of the carrying platform 71 through the connecting frame 721, and the telescopic rod 7511 is extended to drive the carrying platform 71 to rotate relative to the connecting frame 721 until the carrying platform 71 is adjusted to Figure 8 , and then the telescopic rod 7511 is maintained in a horizontal posture parallel to the horizontal plane H by the third telescopic unit 751. Figure 8 The extended state shown in the figure is used to control the carrying platform 71 to always maintain a horizontal posture during the working process, so that the lifting mechanism 72 ensures the horizontal accuracy of the carrying platform 71 when driving the carrying platform 71 to perform lifting movement along the guide rail 200.

[0056] When the lifting device 100 climbs to the guide rail 200a of the buttress column of the hemispherical dome, the carrying platform 71 will tilt relative to the horizontal plane H and change to an inclined posture (this state is not shown), and the third telescopic unit 751 is hinged to the bottom of the carrying platform 71 through the connecting frame 721, and the telescopic rod 7511 is shortened to drive the carrying platform 71 to rotate relative to the connecting frame 721, so as to adjust the carrying platform 71 to the following state: Fig. 9 The horizontal posture parallel to the horizontal plane H shown in the figure enables the carrying platform 71 to adapt to the curvature change of the guide rail 200a, avoiding the inclination of the carrying platform 71 relative to the horizontal plane H caused by the curvature change of the guide rail 200a, and then the telescopic rod 7511 is maintained at Fig. 9 The shortened state shown in the figure is used to control the carrying platform 71 to always maintain a horizontal posture during the operation, thereby ensuring that the lifting device 100 remains stable and balanced during the climbing process, ensuring the horizontal accuracy of the carrying platform 71, preventing the equipment from slipping or the operator from standing unstable due to the tilt of the carrying platform 71, and improving operational safety and work efficiency.

[0057] Ginseng Figure 4 As shown, the connecting frame 721 includes: a cross bar 7211 for mounting the driving motor 723, which is arranged in the length direction of the cross bar 7211 (ie, Figure 4The lifting mechanism 72 further comprises a connecting frame 7212 which is symmetrically arranged on the inner side of the connecting frame 7212 and is rotatably connected to the connecting frame 7212 (in the direction shown by the X-axis in the middle). The connecting frame 7212 is penetrated by the rotating shaft 722. The rotating shaft 722 is rotatably connected to the connecting frame 7212. The driving gear 724 is formed in the connecting frame 7212. The lifting mechanism 72 also comprises: a plurality of guide wheels 725 which are symmetrically arranged on the inner side of the connecting frame 7212 and are rotatably connected to the connecting frame 7212. The guide rail 200 of this embodiment adopts an I-beam structure, and guide grooves (not marked) are formed on both sides of the guide rail 200. The guide wheels 725 are respectively located in the guide grooves on both sides of the guide rail 200, and synchronously drive the guide wheels 725 to move along the guide grooves on both sides of the guide rail 200 during the lifting process of the lifting device 100. The guide wheels 725 are rotatably connected to the connecting frame 7212 through self-lubricating bearings, so that the guide wheels 725 can smoothly run up and down along the guide rail 200. And through the symmetrically arranged guide wheels 725, it can be ensured that the lifting device 100 remains stable during the lifting process, and the shaking and deviation are reduced.

[0058] Ginseng Figure 4 As shown, the connecting frame 7212 includes: two connecting plates 72121 formed on both sides of the inner and outer sides of the guide rail 200, and a fixing plate 72122 disposed between the two connecting plates 72121; the cross bar 7211 passes through the connecting plate 72121a on the inner side of the guide rail 200 along its length direction and is connected to the connecting plate 72121b on the outer side of the guide rail 200; the rotating shaft 722 is connected to the connecting plate 72121a on the inner side of the guide rail 200 along its length direction (i.e., Figure 4 The connecting plate 72121 is provided with a guide wheel 725, and the guide wheel 726 is provided with a guide wheel 727. The guide wheel 727 is provided with a guide wheel 728. The guide wheel 729 is provided with a guide wheel 730, and the guide wheel 731 is provided with a guide wheel 732. The guide wheel 733 is provided with a guide wheel 734, and the guide wheel 735 is provided with a guide wheel 736. The guide wheel 737 is provided with a guide wheel 738. The guide wheel 739 is provided with a guide wheel 740, and the guide wheel 741 is provided with a guide wheel 742. The guide wheel 743 is provided with a guide wheel 744, and the guide wheel 745 is provided with a guide wheel 746. The guide wheel 747 is provided with a guide wheel 748. The guide wheel 749 is provided with a guide wheel 750, and the guide wheel 751 is provided with a guide wheel 752. The guide wheel 753 is provided with a guide wheel 754, and the guide wheel 755 is provided with a guide wheel 756. The guide wheel 757 is provided with a guide wheel 758. The guide wheel 759 is provided with a guide wheel 760, and the guide wheel 761 is provided with a guide wheel 762. The guide wheel 763 is provided with a guide wheel 764, and the guide wheel 765 is provided with a guide wheel 766. The guide wheel 725 is rotatably connected to the inner side walls of the two connecting plates 72121 opposite to each other. The guide wheel 725 is located in the guide grooves on both sides of the guide rail 200, ensuring that the lifting device 100 can smoothly run along the guide rail 200 during the lifting process, reducing shaking and deviation. The guide wheel 725 is rotatably connected to the connecting frame 7212 through a self-lubricating bearing, ensuring that the guide wheel 725 can smoothly run up and down along the guide groove of the guide rail 200, while also reducing friction and wear and extending the service life.

[0059] Ginseng Figure 2 and Figure 4 and Figure 8As shown, the connecting plate 72121 extends toward the carrying platform 71 to form an extension hinge 72123, and the carrying platform 71 is constructed with a first hinge seat 712 hinged to the extension hinge 72123; one end of the connecting plate 72121 away from the extension hinge 72123 extends along the side opposite to the guide rail 200 to form a support hinge 72124, and the support hinge 72124 is hinged to the bottom of the third telescopic unit 751; the carrying platform 71 is constructed with a second hinge seat 711 hinged to the telescopic rod 7511 of the third telescopic unit 751. The extension hinge 72123 is hinged to the first hinge seat 712 to form a support hinge 72124. Figure 2 The axis L is shown in FIG. By extending the hinge 72123 and hingedly connecting with the first hinge seat 712, the connection point between the connecting plate 72121 and the carrying platform 71 is close to the guide rail 200, which helps the lifting mechanism 72 to transmit power to the carrying platform 71 more directly, so as to reduce energy loss and improve lifting efficiency. It also ensures that the connection between the connecting plate 72121 and the carrying platform 71 is stable and reliable, so that the carrying platform 71 can change its angle relative to the guide rail 200 to adapt to the curvature change of the guide rail 200, and ensure that the carrying platform 71 remains stable and balanced during the climbing process.

[0060] By hinge-connecting the fixed end of the third telescopic unit 751 to the support hinge 72124, the connection plate 72121 provides a support position for the fixed end of the third telescopic unit 751 away from the carrying platform 71, which helps the third telescopic unit 751 to more effectively transmit the telescopic torque to the carrying platform 71, ensuring that the leveling mechanism 75 can accurately control the horizontal posture of the carrying platform 71. It also ensures that the connection between the fixed end of the third telescopic unit 751 and the connection plate 72121 is stable and reliable, preventing the third telescopic unit 751 from loosening or deflecting during the telescopic process of driving the telescopic rod 7511 to telescope.

[0061] By hingedly connecting the telescopic rod 7511 of the third telescopic unit 751 with the second hinge seat 711, the support platform 71 provides the telescopic rod 7511 of the third telescopic unit 751 with a hinge position opposite to the guide rail 200, which helps the third telescopic unit 751 to more effectively transmit the telescopic torque to the support platform 71, ensuring that the support platform 71 always maintains a horizontal posture at different positions. The third telescopic unit 751 drives the telescopic rod 7511 to extend or shorten, so as to drive the support platform 71 to rotate along the axis L and relative to the connecting plate 72121 through the second hinge seat 711, so as to adjust the inclination angle of the support platform 71 relative to the horizontal plane H.

[0062] Ginseng Figure 1 and Figure 2 As shown, the lifting device 100 further includes: a flip guardrail 76 hinged to the carrying platform 71, and a winch 77 configured on the carrying platform 71 for retracting and releasing the flip guardrail 76. The bottom of the flip guardrail 76 is hinged to the carrying platform 71, and is hinged with the carrying platform 71 to form a Figure 2 The winch 77 is controlled to rotate the rollover guardrail 76 around the axis K in the direction indicated by K1, so that the rollover guardrail 76 is overlapped to the surface of the containment shell to eliminate the gap between the containment shell and the carrying platform 71, prevent people or objects from falling, and improve the safety of the operation.

[0063] Ginseng Figures 1 to 3 As shown, the lifting device 100 also includes: an auxiliary platform 78 arranged on both sides of the carrying platform 71, a first telescopic unit 781 hinged to the bottom of the auxiliary platform 78, a bottom plate 782 controlled by the first telescopic unit 781 to extend or retract to the bottom of the auxiliary platform 78, a second telescopic unit 783 arranged at the bottom of the auxiliary platform 78, a universal ball head (not shown) arranged at the end of the telescopic rod (not marked) of the second telescopic unit 783, a universal seat (not marked) movably connected to the universal ball head, and a support plate 786 arranged on the universal seat. The first telescopic unit 781 is hinged to the auxiliary platform 78, and the telescopic rod (not marked) of the first telescopic unit 781 is hinged to the bottom plate 782. When the carrying platform 71 reaches the specified position, the support plate 786 is driven to abut against the surface of the containment by extending the telescopic rod of the second telescopic unit 783 to fix the position of the carrying platform 71, prevent the carrying platform 71 from shaking back and forth during operation, and improve the overall stability. Since the surface of the containment shell may be inclined, the support plate 786 can be adjusted according to the inclination angle of the containment shell surface through the universal ball head and the universal seat, ensuring that the support plate 786 can fully fit the surface of the containment shell and improve stability. By configuring the auxiliary platform 78 on both sides of the bearing platform 71, the working space and the carrying work equipment can be expanded to provide more operating areas for the staff. The first telescopic unit 781 is hinged to the auxiliary platform 78, and its telescopic rod is hinged to the bottom plate 782, so that the bottom plate 782 can be extended or retracted to the bottom of the auxiliary platform 78. By driving the bottom plate 782 to extend and abut against the side of the buttress by the first telescopic unit 781, the range of the auxiliary platform 78 can be expanded to increase the working area.

[0064] It should be noted that the telescopic units (i.e., the first telescopic unit 781, the second telescopic unit 783 and the third telescopic unit 751) can be configured as telescopic devices such as hydraulic cylinders, electric push rods, pneumatic cylinders or electric screws, as long as the third telescopic unit 751 can drive the supporting platform 71 to rotate relative to the horizontal plane H through telescopic action to adjust the horizontal posture of the supporting platform 71, the first telescopic unit 781 can drive the base plate 782 to extend and abut against the side of the buttress column, and the second telescopic unit 783 can drive the support plate 786 to extend and abut against the surface of the containment shell.

[0065] Ginseng Figure 3As shown, the lifting device 100 also includes a protective cover 79 fixed to the bearing platform 71 and formed on the outside of the guide rail 200. The protective cover 79 covers the outside of the guide rail 200, isolating the guide rail 200 from the working area to prevent workers from accidentally touching the guide rail 200 and reduce the risk of injury caused by accidental contact. It can also prevent foreign objects (such as tools, parts, etc.) from falling onto the guide rail 200, and avoid foreign objects from getting stuck between the guide rail 200 and the driving gear 724, causing equipment damage or operation failure.

[0066] The series of detailed descriptions listed above are only specific descriptions of feasible implementation methods of the present invention. They are not intended to limit the scope of protection of the present invention. Any equivalent implementation methods or changes that do not deviate from the technical spirit of the present invention should be included in the scope of protection of the present invention.

[0067] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0068] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A prestressed tension anti-fall lifting device, characterized in that: include: A load-bearing platform, a lifting mechanism disposed at the bottom of the load-bearing platform to drive the load-bearing platform to rise and fall, and an anti-falling mechanism disposed on the lifting mechanism; The lifting mechanism comprises: a connecting frame, a rotating shaft arranged at both sides of the connecting frame and rotatably connected to the connecting frame, a driving motor arranged at the connecting frame to drive the rotating shaft to rotate, and a driving gear coaxially sleeved at both ends of the rotating shaft and meshing with a rack formed on the outer side of the guide rail; The anti-falling mechanism comprises: a shell arranged on the connecting frame and penetrated by the rotating shaft, an anti-falling device arranged on the shell, and a transmission gear arranged inside the shell and coaxially sleeved on the rotating shaft; The fall arrester is configured with a brake gear meshing with the transmission gear to limit the rotation of the rotation shaft.

2. The prestressed tension anti-fall lifting device according to claim 1 is characterized in that: The transmission gear is configured to have a sleeve portion formed outside the rotating shaft, and the sleeve portion extends radially outward to form a gear portion meshed with the brake gear; The inner peripheral wall of the sleeve portion is recessed to form a limiting groove, and the rotating shaft is constructed to form a rotating block extending into the limiting groove.

3. The prestressed tension anti-fall lifting device according to claim 1 is characterized in that: The anti-fall mechanism further includes: a speed-increasing gear internally disposed in the housing and rotatably connected to the housing, wherein the speed-increasing gear is formed between the transmission gear and the braking gear and meshes with the transmission gear and the braking gear.

4. The prestressed tension anti-fall lifting device according to claim 2, characterized in that: The anti-fall mechanism also includes: a rotating support member coaxially sleeved on the sleeve portion, the inner ring of the rotating support member is fixedly connected to the sleeve portion, and an end cover is arranged on the shell and fixedly connected to the outer ring of the rotating support member, the end cover is penetrated by the rotating shaft and radially separated from the rotating shaft.

5. The prestressed tension anti-fall lifting device according to claim 1, characterized in that: The lifting mechanism is hinged to one side of the bottom of the carrying platform close to the guide rail; The prestressed tensioning anti-fall lifting device also includes: a leveling mechanism, which is configured on the lifting mechanism and hinged to the side of the bottom of the bearing platform opposite to the guide rail. The leveling mechanism drives the bearing platform to rotate relative to the lifting mechanism through a telescopic action to adjust the bearing platform to a horizontal posture.

6. The prestressed tension anti-fall lifting device according to claim 5, characterized in that: The connecting frame is hinged to one side of the bottom of the carrying platform close to the guide rail; The leveling mechanism includes: a third telescopic unit configured on the connecting frame, a fixed end of the third telescopic unit is hinged to a side of the connecting frame away from the bearing platform, and a telescopic rod of the third telescopic unit is hinged to a side of the bearing platform opposite to the guide rail.

7. The prestressed tension anti-fall lifting device according to claim 6, characterized in that: The connecting frame comprises: a cross bar for mounting the driving motor, a connecting frame arranged at both ends of the cross bar in the length direction and penetrated by the rotating shaft, the rotating shaft is rotatably connected with the connecting frame, and the driving gear is formed in the connecting frame; The lifting mechanism further comprises: a plurality of guide wheels symmetrically arranged inside the connecting frame and rotatably connected to the connecting frame.

8. The prestressed tension anti-fall lifting device according to claim 7, characterized in that: The connection frame comprises: two connection plates formed on both sides of the guide rail, and a fixing plate arranged between the two connection plates; The cross bar passes through the connecting plate on the inner side of the guide rail along its length direction and is connected to the connecting plate on the outer side of the guide rail; The rotating shaft passes through the connecting plate along its length direction and is rotatably connected to the connecting plate. The driving gear is formed between the two connecting plates and meshes with the rack formed on the outer side of the guide rail. The guide wheel is rotatably connected to the opposite inner side walls of the two connecting plates.

9. The prestressed tension anti-fall lifting device according to claim 8, characterized in that: The connecting plate extends toward the carrying platform to form an extended hinge, and the carrying platform is configured with a first hinge seat hinged to the extended hinge; One end of the connecting plate away from the extension hinge extends along a side opposite to the guide rail to form a support hinge, and the support hinge is hinged to the fixed end of the third telescopic unit; The carrying platform is constructed with a second hinge seat hinged to the telescopic rod of the third telescopic unit.

10. The prestressed tension anti-fall lifting device according to claim 1, characterized in that: The prestressed tension anti-fall lifting device also includes: a flip guardrail hinged to the bearing platform, and auxiliary platforms arranged on both sides of the bearing platform.

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