Prestress tension lifting device

Abstract

The invention provides a prestress tensioning lifting device. The prestress tensioning lifting device comprises a suspended load shaft, power mechanisms arranged on the two sides of the suspended load shaft, cantilever mechanisms arranged at the two ends of the suspended load shaft to suspend tensioning equipment, and a pivoting mechanism connected with the power mechanisms and the suspended load shaft. The pivoting mechanism comprises at least two hanging seat units which are arranged on the hanging load shaft in a sleeving mode and rotationally connected with the hanging load shaft, and transmission shafts which are contained by the power mechanism and close to the two sides of the hanging load shaft penetrate through the two ends of the hanging seat units in the length direction correspondingly. The hanging seat unit is arranged on the side portion, close to the cantilever mechanism, of the load hanging shaft. Through the hanging seat unit, the load at the end of the load hanging shaft is dispersed, so that the stress at the end of the load hanging shaft is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of building construction machinery, and in particular to a prestressed tensioning and 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. The Chinese utility model patent with announcement number CN211548700U discloses a prestressed construction platform for an inner factory building, comprising two guide rails installed along the vertical surface of the buttress column of the inner factory building, on which a construction operation platform is installed through a lifting drive device, and a hoist device that slides along the guide rail and is independent of the construction operation platform is also installed on the guide rail. The inner factory building prestressed construction platform in the above-mentioned prior art has telescopic booms installed at both ends of the load-bearing frame through upper slewing bearings, and the ends of the two telescopic booms are respectively installed with hydraulic jacks through lower slewing bearings and rotating booms.

[0004] However, in the above-mentioned prior art prestressed construction platform for the inner factory building, since the weight of the telescopic boom and the lower slewing bearing, rotating boom and hydraulic top it carries is mainly concentrated on the end of the load-bearing frame, the end of the load-bearing frame bears a large load. Due to the lack of sufficient support at the end of the load-bearing frame, the load-bearing frame is prone to bending and deformation, thereby affecting the horizontal posture control accuracy of the hoisting device.

[0005] In view of this, it is necessary to improve the prestressed construction platform of the internal factory building in the prior art to solve the above problems. Summary of the invention

[0006] The purpose of the present invention is to disclose a prestressed tensioning and lifting device for solving many defects existing in the prestressed construction platform of the internal factory building in the prior art, especially for dispersing the load at the end of the hanging weight shaft to reduce the stress at the end of the hanging weight shaft.

[0007] To achieve the above-mentioned object, the present invention provides a prestressed tensioning lifting device, comprising: a hanging weight shaft, a power mechanism disposed on both sides of the hanging weight shaft, a cantilever mechanism disposed at both ends of the hanging weight shaft to suspend the tensioning device, and a pivot mechanism connecting the power mechanism and the hanging weight shaft;

[0008] The pivot mechanism comprises: at least two mounting units sleeved on the suspension shaft and rotatably connected to the suspension shaft, and the two ends of the mounting units in the length direction are respectively penetrated by the transmission shafts included in the power mechanism and close to the two sides of the suspension shaft;

[0009] The mounting unit is arranged on a side of the suspension shaft close to the cantilever mechanism.

[0010] As a further improvement of the present invention, the power mechanism comprises: a connecting frame, the transmission shaft is arranged on both sides of the connecting frame and is parallel to the suspension shaft, and the transmission shaft axially penetrates the connecting frame and is rotatably connected to the connecting frame;

[0011] The mounting unit is arranged at the end of the transmission shaft extending out of the connecting frame.

[0012] As a further improvement of the present invention, at least two mounting units are respectively arranged on both sides of the suspension shaft close to the cantilever mechanism, and the mounting units are arranged on the shaft section of the transmission shaft that does not pass through the connecting frame.

[0013] As a further improvement of the present invention, it is characterized in that the mounting units are symmetrically arranged on two sides of the suspension shaft close to the cantilever mechanism.

[0014] As a further improvement of the present invention, the mount unit includes: a first sleeve portion coaxially sleeved on the outside of the suspension shaft and rotatably connected to the suspension shaft, a plurality of mount plates fixedly arranged on the first sleeve portion, both ends of the mount plates in the length direction being penetrated by transmission shafts close to both sides of the suspension shaft, and a second sleeve portion radially clamped between the end of the mount plate and the transmission shaft.

[0015] As a further improvement of the present invention, the pivot mechanism further includes: a first retaining ring sleeved on the suspension shaft and adjacent to the first sleeve portion, and a second retaining ring sleeved on the transmission shaft and adjacent to the second sleeve portion.

[0016] As a further improvement of the present invention, the connecting frame comprises: a cross bar, a connecting frame arranged at both ends of the cross bar and penetrated by the transmission shaft, and the transmission shaft is rotatably connected to the connecting frame;

[0017] The power mechanism also includes: a first drive motor configured on the cross bar to drive the transmission shaft to rotate, a power gear coaxially sleeved on both ends of the transmission shaft and meshing with a rack formed on the outer side of the guide rail and formed in the connecting frame, and a plurality of guide wheels symmetrically arranged on the inner side wall of the connecting frame and rotatably connected to the connecting frame.

[0018] As a further improvement of the present invention, the prestressed tensioning and lifting device further comprises: a leveling mechanism configured on the power mechanism to adjust the cantilever mechanism to a horizontal posture;

[0019] The leveling mechanism comprises: a support assembly arranged on the connecting frame, a telescopic unit hinged to the support assembly, and a hinge seat sleeved on the outside of the suspension shaft and hinged to the telescopic rod of the telescopic unit.

[0020] As a further improvement of the present invention, the cantilever mechanism includes: a first drive component, a first cantilever controlled by the first drive component and rotating in a first horizontal plane, a second drive component arranged at an end of the first cantilever away from the first drive component, a second cantilever controlled by the second drive component and rotating in a second horizontal plane, and a suspension device arranged at the second cantilever and suspending the tensioning device to move along the length direction of the second cantilever.

[0021] As a further improvement of the present invention, the prestressed tensioning and lifting device further comprises: an anti-falling mechanism configured on the power mechanism;

[0022] The anti-falling mechanism comprises: a shell arranged on the connecting frame and penetrated by the transmission shaft, an anti-falling device arranged on the shell, and a transmission component arranged inside the shell and connected to the anti-falling device to prevent the transmission shaft from rotating.

[0023] Compared with the prior art, the beneficial effects of the present invention are: by arranging the mount unit on the side of the suspension shaft close to the cantilever mechanism, the mount unit forms a support point on the side of the suspension shaft close to the cantilever mechanism, thereby dispersing the load on the end of the suspension shaft, reducing the stress at the end of the suspension shaft, and further reducing the bending deformation of the end of the suspension shaft, so as to improve the accuracy of the lifting device when adjusting the horizontal posture of the cantilever mechanism, and ensure that the cantilever mechanism and the suspended tensioning equipment maintain a more stable horizontal posture during operation, so as to solve the problem in the prior art that the load-bearing frame of the internal factory building prestressed construction platform is prone to bending deformation due to the lack of sufficient support at the end of the load-bearing frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is an overall schematic diagram of the prestressed tensioning and lifting device disclosed by the present invention;

[0025] Figure 2 This is the front view of the prestressed tensioning and lifting device;

[0026] Figure 3 for Figure 1 The partial enlarged view shown in the dotted frame E;

[0027] Figure 4 It is a partial schematic diagram of the cantilever mechanism being arranged at the end of the suspension shaft;

[0028] Figure 5 A side view of a guide rail of a prestressed tension lifting device located on the outer facade of a cylinder buttress column of a containment vessel;

[0029] Figure 6 Side view of the guide rails for the prestressed tensioning hoist to climb to the outer facade of the hemispherical dome buttresses of the containment vessel;

[0030] Figure 7 for Figure 2 A cross-sectional view of the transmission shaft and transmission gear cut along the AA axis;

[0031] Figure 8 for Figure 7 A cross-sectional view of the transmission shaft and transmission gear cut along the BB axis;

[0032] Fig. 9 This is a front view of the guide wheels formed on both sides of the guide rail and the power gear meshing with the rack. DETAILED DESCRIPTION

[0033] 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.

[0034] It is particularly important to note that in the following embodiments, the term "axial" means Figure 2 The axis P of the central suspension shaft 1 is in the direction shown and is parallel to the horizontal plane H. The term "transverse" means a direction parallel to the axial direction.

[0035] Please refer to Figures 1 to 9 A specific implementation of a prestressed tensioning lifting device (hereinafter referred to as "lifting device 100") is disclosed.

[0036] It should be noted that the containment shell is usually divided into two parts: a cylinder and a hemispherical dome. The cylinder is perpendicular to the ground and forms a 90-degree angle with the horizontal plane. The buttresses are arranged in the containment shell and protrude from the outer wall of the containment shell. The buttresses extend from the cylinder to the hemispherical dome. In this embodiment, the guide rail 200 is installed on the outer facade (not shown) of the buttresses (not shown) through embedded parts (not shown). Fig. 9 As shown, two guide rails 200 are arranged at intervals along the lateral direction on the outer surface of the buttress column. Figure 5 As shown, the guide rail 200 of the buttress column arranged on the cylinder is perpendicular to the horizontal plane H, and the anti-falling lifting device 100 moves up and down along the guide rail 200 in the vertical plane. Figure 6 As shown, the guide rail 200a provided on the buttress 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.

[0037] Ginseng Figure 1 and Figure 2 As shown, in this embodiment, the lifting device 100 includes: a suspension shaft 1, a power mechanism 2 arranged on both sides of the suspension shaft 1, a cantilever mechanism 4 arranged at both ends of the suspension shaft 1 to suspend a tensioning device (not shown), and a pivot mechanism 6 connecting the power mechanism 2 and the suspension shaft 1. The suspension shaft 1 is parallel to the horizontal plane H, and the suspension shaft 1 is the core support of the lifting device 100, bearing the weight of other components such as the cantilever mechanism 4, and providing an installation foundation for other components (such as the power mechanism 2 and the cantilever mechanism 4). The cantilever mechanism 4 is configured with two groups and is respectively arranged at both ends of the axial direction of the suspension shaft 1. The cantilever mechanism 4 is used to suspend the tensioning device to drive the tensioning device to move to the working position. The power mechanism 2 is connected to the suspension shaft 1 through the pivot mechanism 6, so that the power mechanism 2 can drive the suspension shaft 1 and the cantilever mechanism 4 arranged at the end of the suspension shaft 1 and suspending the tensioning device (such as a jack) to rise and fall along the guide rail 200 through the pivot mechanism 6.

[0038] Ginseng Figures 1 to 3As shown, the pivot mechanism 6 includes: at least two mounting units 61 which are sleeved on the weight-bearing shaft 1 and rotatably connected to the weight-bearing shaft 1, and the two ends of the mounting unit 61 in the length direction are respectively penetrated by the transmission shaft 22 included in the power mechanism 2 and close to the two sides of the weight-bearing shaft 1; the mounting unit 61 is arranged on the side of the weight-bearing shaft 1 close to the cantilever mechanism 4.

[0039] At least one mounting unit 61 is respectively disposed on the two sides of the suspension shaft 1 close to the cantilever mechanism 4, and the transmission shaft 22 passes through both ends of the mounting unit 61 and is rotatably connected to the mounting unit 61, connecting the power mechanism 2 with the suspension shaft 1, so that the power mechanism 2 can transmit power to the suspension shaft 1, so as to drive the suspension shaft 1 and the cantilever mechanism 4 carried by it to perform lifting and lowering movements along the guide rail 200. The mounting unit 61 is rotatably connected to the suspension shaft 1, so that the mounting unit 61 can support the suspension shaft 1 and the cantilever mechanism 4 to rotate smoothly. When the lifting device 100 climbs to the guide rail 200a of the buttress column of the hemispherical dome, the power mechanism 2 and the suspension shaft 1 are rotated through the mounting unit 61. The power mechanism 2 can be rotated and the angle can be changed through the mounting unit 61, so that the power mechanism 2 can adapt to the curvature change of the guide rail 200a, so that the power mechanism 2 can continue to provide power along the guide rail 200a, avoiding the interruption of power transmission caused by the change of the curvature of the guide rail 200a, and then the power mechanism 2 can drive the suspension shaft 1 to rise and fall stably along the guide rail 200a.

[0040] By configuring the mount unit 61 on the side of the suspension shaft 1 close to the cantilever mechanism 4, the mount unit 61 forms a support point on the side of the suspension shaft 1 close to the cantilever mechanism 4 to disperse the load at the end of the suspension shaft 1 and reduce the stress concentration at the end of the suspension shaft 1, thereby reducing the bending deformation of the suspension shaft 1 caused by the concentrated load. The problem of the prestressed construction platform of the internal factory building in the prior art that the end of the load-bearing frame lacks sufficient support, so that the end of the load-bearing frame is subjected to a large bending moment, causing the load-bearing frame to be easily bent and deformed is solved. In addition, the mount unit 61 as a support point can also enhance the rigidity of the suspension shaft 1, making the suspension shaft 1 more stable when bearing loads, thereby reducing the horizontal posture deviation of the cantilever mechanism 4 caused by bending deformation, so as to improve the accuracy of the lifting device 100 in adjusting the horizontal posture of the cantilever mechanism 4, and ensure that the cantilever mechanism 4 and the suspended tensioning equipment maintain a more stable horizontal posture during the working process.

[0041] It should be noted that the mount unit 61 is rotationally connected to the suspension shaft 1 and the transmission shaft 22 through bearings (for example, graphite copper sleeves, rolling bearings, etc. that can achieve rotation function) to ensure that the mount unit 61, the suspension shaft 1, and the transmission shaft 22 rotate smoothly.

[0042] Ginseng Figure 1As shown, preferably, the lifting device 100 includes two sets of power mechanisms 2, and the two sets of power mechanisms 2 are symmetrically arranged along the axis P of the suspension shaft 1. During the lifting process of the lifting device 100, the two symmetrically arranged sets of power mechanisms 2 work together to drive the suspension shaft 1 to be lifted and lowered along the guide rail 200, and the load can be evenly shared, thereby improving the balance of the lifting device 100 and ensuring that the lifting device 100 rises or falls smoothly.

[0043] Ginseng Figure 2 As shown, the power mechanism 2 includes: a connecting frame 21, a transmission shaft 22 is arranged on both sides of the connecting frame 21 and is parallel to the suspension shaft 1, and the transmission shaft 22 axially penetrates the connecting frame 21 and is rotatably connected to the connecting frame 21; Figure 3 As shown, the mount unit 61a is arranged at the end of the transmission shaft 22 extending out of the connecting frame 21. The power mechanism 2 transmits the driving force to the mount unit 61 through the transmission shaft 22, and then the mount unit 61 transmits it to the suspension shaft 1, so as to drive the suspension shaft 1 to move up and down along the guide rail 200. The mount unit 61a is arranged at the end of the transmission shaft 22 extending out of the connecting frame 21 and forms a support point on the suspension shaft 1, so that the mount unit 61a is closer to the position of the load-bearing tensioning device, shortening the action distance of the driving force, thereby reducing the bending stress at the end of the suspension shaft 1 and improving the rigidity and stability of the suspension shaft 1. The end of the transmission shaft 22 is provided with an end cap 64 formed on the outside of the mount unit 61a to prevent the mount unit 61a from being displaced on the transmission shaft 22 due to vibration or external force.

[0044] Further, Figure 3 As shown, at least two mounting units 61 are respectively arranged on both sides of the suspension shaft 1 close to the cantilever mechanism 4, and the mounting unit 61b is arranged on the shaft section of the transmission shaft 22 that does not pass through the connecting frame 21. Although the mounting unit 61b is farther away from the end of the suspension shaft 1 than the mounting unit 61a, it can provide an additional support point, which helps to disperse the load on the suspension shaft 1, thereby reducing the stress concentration on a single support point, reducing the deformation caused by excessive force on a single point, and through the joint support of the mounting unit 61a and the mounting unit 61b, the rigidity of the suspension shaft 1 is improved, making the suspension shaft 1 more stable.

[0045] In this embodiment, preferably, Figure 2 As shown, the mounting units 61 are symmetrically arranged on both sides of the suspension shaft 1 close to the cantilever mechanism 4. The symmetrically arranged mounting units 61 can provide symmetrical support points on both sides of the suspension shaft 1, so that the suspension shaft 1 is more stable when bearing a load, and ensure that the load distribution on the suspension shaft 1 is more uniform, so as to reduce structural deformation and stress concentration caused by excessive load on one side of the suspension shaft 1.

[0046] Ginseng Figure 3As shown, the mount unit 61 includes: a first sleeve portion 611 coaxially sleeved on the outside of the suspension shaft 1 and rotatably connected to the suspension shaft 1, a plurality of mount plates 612 fixedly mounted on the first sleeve portion 611, the two ends of the mount plate 612 in the length direction are penetrated by the transmission shaft 22 close to the two sides of the suspension shaft 1, and a second sleeve portion 613 radially clamped between the end of the mount plate 612 and the transmission shaft 22. The first sleeve portion 611 is used to ensure that the suspension shaft 1 can rotate freely relative to the mount unit 61. The transmission shaft 22 is connected to the first sleeve portion 611 through the mount plate 612, which plays the role of transmitting driving force and providing support, and the number of the mount plates 612 can be adjusted according to actual needs to ensure sufficient support strength. The second sleeve portion 613 is radially clamped between the end of the mount plate 612 and the transmission shaft 22 to ensure a firm connection between the mount plate 612 and the transmission shaft 22, and to ensure that the transmission shaft 22 can rotate freely relative to the mount unit 61.

[0047] Ginseng Figure 3 As shown, the pivot mechanism 6 further includes: a first retaining ring 62 sleeved on the weight-suspending shaft 1 and adjacent to the first sleeve portion 611, and a second retaining ring 63 sleeved on the transmission shaft 22 and adjacent to the second sleeve portion 613. The first retaining ring 62 can prevent the first sleeve portion 611 from axially moving on the weight-suspending shaft 1 and limit the axial position of the first sleeve portion 611, and the second retaining ring 63 can prevent the second sleeve portion 613 from axially moving on the transmission shaft 22 and limit the axial position of the second sleeve portion 613, thereby ensuring that the position of the mount unit 61 is fixed, avoiding unnecessary sliding or loosening, and improving the stability between the mount unit 61 and the weight-suspending shaft 1.

[0048] Ginseng Figure 2 As shown, the connecting frame 21 includes: a crossbar 211, a connecting frame 212 disposed at both ends of the crossbar 211 and penetrated by the transmission shaft 22, and the transmission shaft 22 is rotatably connected to the connecting frame 212; the power mechanism 2 also includes: a first driving motor 23 disposed on the crossbar 211 to drive the transmission shaft 22 to rotate, a power gear 24 coaxially sleeved at both ends of the transmission shaft 22 and meshing with a rack (not shown) formed on the outer side of the guide rail 200 and formed in the connecting frame 212, and a plurality of guide wheels 25 symmetrically disposed on the inner side wall of the connecting frame 212 and rotatably connected to the connecting frame 212. Figure 3 As shown, the mounting unit 61 a is disposed at the end of the transmission shaft 22 extending out of the connection frame 212 , and the mounting unit 61 b ​​is disposed at the shaft section of the transmission shaft 22 that does not pass through the connection frame 212 .

[0049] The connecting frame 21 serves as the main frame of the power mechanism 2, and is used to support and fix other components such as the transmission shaft 22 and the first drive motor 23. Preferably, the power mechanism 2 includes two transmission shafts 22, and the two transmission shafts 22 are symmetrically arranged on the upper and lower sides of the connecting frame 21. By starting the first drive motor 23 to drive the transmission shaft 22 to rotate relative to the connecting frame 21, the transmission shaft 22 synchronously drives the power gears 24 at both ends to rotate, and the power gears 24 at both ends of the transmission shaft 22 are respectively engaged with the racks formed on the outside of the guide rail 200, so that the power gears 24 move along the racks to achieve the lifting and lowering movement of the suspension shaft 1 along the guide rail 200. 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 25 are respectively located in the guide grooves on both sides of the guide rail 200, and synchronously drive the guide wheels 25 to move along the guide grooves on both sides of the guide rail 200 when the lifting device 100 is lifted or lowered. The guide wheel 25 is rotatably connected to the connection frame 212 through a self-lubricating bearing, so that the guide wheel 25 can smoothly run up and down along the guide rail 200. And through the symmetrically arranged guide wheels 25, it can be ensured that the lifting device 100 remains stable during the lifting process, reducing shaking and deviation.

[0050] Ginseng Figure 1 As shown, the lifting device 100 further includes: a leveling mechanism 5 configured on the power mechanism 2 to adjust the cantilever mechanism 4 to a horizontal posture. The leveling mechanism 5 drives the suspension shaft 1 to rotate along the axis P and relative to the pivot mechanism 6, and simultaneously drives the cantilever mechanism 4 to rotate, so as to adjust the cantilever mechanism 4 and the tensioning equipment suspended therefrom to a horizontal posture parallel to the horizontal plane H.

[0051] Ginseng Figure 2 and Figure 5 and Figure 6 As shown, the leveling mechanism 5 includes: a support assembly 51 configured on the connection frame 21, a telescopic unit 52 hinged to the support assembly 51, and a hinge seat 53 sleeved on the outside of the suspension shaft 1 and hinged to the telescopic rod 521 of the telescopic unit 52. The power mechanism 2 on the top of the suspension shaft 1 is configured with a support assembly 51; the support assembly 51 includes: a support arm 511 configured on the connection frame 212, and a support seat 512 whose two ends are respectively fixed to the support arm 511 and the cross bar 211 and hinged to the telescopic unit 52. The support arm 511 is configured on the connection frame 212 and is connected to the cross bar 211 by bolts to stably support the telescopic unit 52. The two ends of the support seat 512 are respectively fixed on the support arm 511 and the cross bar 211, and are hinged to the telescopic unit 52. One end of the telescopic unit 52 is hinged to the support seat 512, and the other end is hinged to the hinge seat 53.

[0052] When the lifting device 100 is lifted and lowered along the guide rail 200 of the buttress column of the cylinder, the suspension shaft 1 and the transmission shaft 22 are connected by rotating the mounting unit 61, and the telescopic unit 52 drives the telescopic rod 521 to shorten, so as to drive the suspension shaft 1 to rotate relative to the mounting unit 61 through the hinge seat 53, so as to synchronously drive the cantilever mechanism 4 to rotate along the axis P of the suspension shaft 1, until the cantilever mechanism 4 and the tensioning device suspended by it are adjusted to Figure 5 The telescopic rod 521 is then held in a horizontal position parallel to the horizontal plane H by the telescopic unit 52. Figure 5 The shortened state shown in the figure is used to control the tensioning device to always maintain a horizontal posture during operation, so that the power mechanism 2 can ensure the construction accuracy of the tensioning device when driving the suspension shaft 1 to move up and down 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 cantilever mechanism 4 and the tensioning equipment suspended therefrom will tilt relative to the horizontal plane H and change to a tilted posture (this state is not shown), and the suspension shaft 1 and the transmission shaft 22 are connected by rotation through the mounting unit 61, and the telescopic unit 52 drives the telescopic rod 521 to extend, so as to drive the suspension shaft 1 to rotate relative to the mounting unit 61 through the hinge seat 53, so as to synchronously drive the cantilever mechanism 4 to rotate along the axis P of the suspension shaft 1, so as to adjust the cantilever mechanism 4 and the tensioning equipment suspended therefrom to the following: Figure 6 The horizontal posture parallel to the horizontal plane H is shown, so that the cantilever mechanism 4 and the tensioning device suspended therefrom can adapt to the curvature change of the guide rail 200a, and avoid the tensioning device being tilted relative to the horizontal plane H due to the curvature change of the guide rail 200a. Then, the telescopic rod 521 is kept at Figure 6 The extended state shown in the figure is used to control the tensioning equipment to always maintain a horizontal posture during operation, thereby ensuring that the lifting device 100 remains stable and balanced during the climbing process, thereby ensuring the construction accuracy of the tensioning equipment.

[0054] Ginseng Figure 1 and Figure 2 and Figure 4As shown, the cantilever mechanism 4 includes: a first drive assembly 41, a first cantilever 42 controlled by the first drive assembly 41 and rotating in a first horizontal plane H1, a second drive assembly 43 arranged at one end of the first cantilever 42 away from the first drive assembly 41, a second cantilever 44 controlled by the second drive assembly 43 and rotating in a second horizontal plane H2, and a suspension device 45 (such as an electric hoist) arranged on the second cantilever 44 and suspending the tensioning device to move along the length direction of the second cantilever 44. The first cantilever 42 and the second cantilever 44 are located on two different parallel planes, and the first horizontal plane H1 and the second horizontal plane H2 are parallel to each other, thereby ensuring the overall leveling accuracy of the cantilever mechanism 4. The first driving component 41 is used to drive the first cantilever 42 and the second driving component 43 configured therein to rotate in the first horizontal plane H1, and the second driving component 43 is used to drive the second cantilever 44 and the suspension device 45 configured therein to rotate in the second horizontal plane H2, and the tensioning device is suspended by the suspension device 45 to move along the length direction of the second cantilever 44 to drive the tensioning device to move to the desired working position, so that the tensioning device can cover a larger working area and increase the operating range of the cantilever mechanism 4.

[0055] Ginseng Figure 1 and Figure 4 As shown, the first driving component 41 includes: a first mounting seat 411, a first slewing bearing 412 with an inner ring fixedly mounted on the first mounting seat 411, an outer ring of the first slewing bearing 412 fixedly mounted on the first cantilever 42, a first slewing gear 413 sleeved on the outer side of the first slewing bearing 412, a second driving motor 414 disposed on the first mounting seat 411, and a first driving gear 415 disposed on the output shaft of the second driving motor 414 and meshing with the first slewing gear 413; the second driving component 43 includes: a second mounting seat 431, a second slewing bearing 432 with an inner ring fixedly mounted on the second mounting seat 431, an outer ring of the second slewing bearing 432 fixedly mounted on the second cantilever 44, a second slewing gear 433 sleeved on the outer side of the second slewing bearing 432, a third driving motor 434 disposed on the second mounting seat 431, and a second driving gear 435 disposed on the output shaft of the third driving motor 434 and meshing with the second slewing gear 433.

[0056] The second driving motor 414 drives the first rotating gear 413 to rotate through the first driving gear 415 on its output shaft, and the first rotating gear 413 drives the first cantilever 42 and the second driving component 43 configured therein to rotate in the first horizontal plane H1 through the first rotating bearing 412. The third driving motor 434 drives the second rotating gear 433 to rotate through the second driving gear 435 on its output shaft, and the second rotating gear 433 drives the second cantilever 44 and the suspension device 45 configured therein to rotate in the second horizontal plane H2 through the second rotating bearing 432, so as to drive the tensioning device to move to the desired working position through the suspension device 45, so that the tensioning device can cover a larger working area.

[0057] Ginseng Figure 4 As shown, the cantilever mechanism 4 also includes: a connecting hoop 46 which is sleeved on the outside of the suspension shaft 1 and fits with the outer periphery of the end of the suspension shaft 1. The connecting hoop 46 is connected to the first mounting seat 411 by bolts to ensure that the cantilever mechanism 4 is firmly connected to the suspension shaft 1.

[0058] Ginseng Figure 1 and Figure 2 As shown, the lifting device 100 further includes: an anti-falling mechanism 3 configured on the power mechanism 2. The anti-falling mechanism 3 is configured on the power mechanism 2 to prevent the lifting device 100 from falling out of control in an emergency (such as stalling, falling) to ensure the safety of personnel and the device.

[0059] Ginseng Figure 7 and Figure 8 As shown, the anti-fall mechanism 3 includes: a housing 31 arranged on the crossbar 211 and penetrated by the transmission shaft 22, an anti-fall device 32 arranged on the housing 31, and a transmission assembly arranged in the housing 31 and connected to the anti-fall device 32 to limit the rotation of the transmission shaft 22. When an emergency occurs in the lifting device 100, the anti-fall device 32 quickly locks the transmission assembly to prevent the transmission shaft 22 from rotating, and at the same time prevents the power gears 24 at both ends of the transmission shaft 22 from continuing to move along the rack, so as to prevent the lifting device 100 from falling out of control. The transmission assembly includes: a transmission gear 33 coaxially sleeved on the transmission shaft 22, and a speed-increasing gear 35 arranged in the housing 31 and rotatably connected to the housing 31; the anti-fall device 32 is constructed with a brake gear 34 meshing with the transmission gear 33. 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.

[0060] Under normal working conditions, the first drive motor 23 drives the transmission shaft 22 to drive the power gear 24 to move along the rack, so as to drive the suspension shaft 1 to move up and down, and the transmission shaft 22 synchronously drives the transmission gear 33 to rotate, so that the transmission gear 33 drives the speed-increasing gear 35 to drive the brake gear 34 to rotate. When an emergency occurs in the lifting device 100, the transmission gear 33 drives the speed-increasing gear 35 to drive the brake gear 34 to rotate rapidly, and the anti-fall device 32 is activated when detecting the emergency situation, and the anti-fall device 32 quickly locks the brake gear 34. Since the brake gear 34 is meshed with the speed-increasing gear 35, the speed-increasing gear 35 is limited to rotate through the brake gear 34, thereby preventing the transmission gear 33 and the transmission shaft 22 from rotating, and at the same time preventing the power gears 24 at both ends of the transmission shaft 22 from continuing to move along the guide rail 200, so as to achieve simultaneous locking of both sides of the transmission shaft 22 during emergency braking, and prevent the lifting device 100 from falling out of control.

[0061] The speed-increasing gear 35 can ensure the synchronous meshing between the transmission gear 33 and the brake gear 34, avoid slipping or incomplete meshing between the transmission gear 33 and the brake gear 34 during emergency braking, and make the emergency braking process smoother, which can reduce the impact during emergency braking. In addition, 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 transmission shaft 22, so as to quickly lock the brake gear 34 to prevent the transmission shaft 22 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, thereby improving the stability during emergency braking.

[0062] 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.

[0063] Ginseng Figure 1 and Figure 2As shown, in this embodiment, preferably, the anti-fall mechanism 3 is arranged at the power mechanism 2 at the bottom of the suspension shaft 1, and the transmission gear 33 is sleeved on the outside of the transmission shaft 22 at the bottom of the connecting frame 21. By arranging the anti-fall mechanism 3 at the power mechanism 2 at the bottom of the suspension shaft 1, the braking mechanism can be quickly triggered and the braking gear 34 can be locked in an emergency to prevent the transmission shaft 22 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.

[0064] 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.

[0065] 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.

[0066] 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 tensioning and lifting device, characterized in that: include: A suspension shaft, a power mechanism disposed on both sides of the suspension shaft, a cantilever mechanism disposed at both ends of the suspension shaft to suspend a tensioning device, and a pivot mechanism connecting the power mechanism and the suspension shaft; The pivot mechanism comprises: at least two mounting units sleeved on the suspension shaft and rotatably connected to the suspension shaft, and the two ends of the mounting units in the length direction are respectively penetrated by the transmission shafts included in the power mechanism and close to the two sides of the suspension shaft; The mounting unit is arranged on a side of the suspension shaft close to the cantilever mechanism.

2. The prestressed tensioning and lifting device according to claim 1, characterized in that: The power mechanism comprises: a connecting frame, the transmission shaft is arranged on both sides of the connecting frame and is parallel to the suspension shaft, and the transmission shaft axially penetrates the connecting frame and is rotatably connected to the connecting frame; The mounting unit is arranged at the end of the transmission shaft extending out of the connecting frame.

3. The prestressed tensioning and lifting device according to claim 2, characterized in that: At least two of the mounting units are respectively arranged on both sides of the suspension shaft close to the cantilever mechanism, and the mounting units are arranged on the shaft section of the transmission shaft that does not pass through the connecting frame.

4. The prestressed tensioning and lifting device according to any one of claims 1 to 3, characterized in that: The mounting units are symmetrically arranged on two sides of the suspension shaft close to the cantilever mechanism.

5. The prestressed tensioning and lifting device according to claim 4, characterized in that: The mount unit includes: a first sleeve portion coaxially sleeved on the outside of the suspension shaft and rotatably connected to the suspension shaft, a plurality of mount plates fixedly mounted on the first sleeve portion, both ends of the mount plates in the length direction being penetrated by transmission shafts close to both sides of the suspension shaft, and a second sleeve portion radially clamped between the end of the mount plate and the transmission shaft.

6. The prestressed tensioning and lifting device according to claim 5, characterized in that: The pivot mechanism further includes: a first retaining ring sleeved on the suspension shaft and adjacent to the first sleeve portion, and a second retaining ring sleeved on the transmission shaft and adjacent to the second sleeve portion.

7. The prestressed tensioning and lifting device according to claim 3, characterized in that: The connecting frame comprises: a cross bar, a connecting frame arranged at both ends of the cross bar and penetrated by the transmission shaft, and the transmission shaft is rotatably connected to the connecting frame; The power mechanism also includes: a first drive motor configured on the cross bar to drive the transmission shaft to rotate, a power gear coaxially sleeved on both ends of the transmission shaft and meshing with a rack formed on the outer side of the guide rail and formed in the connecting frame, and a plurality of guide wheels symmetrically arranged on the inner side wall of the connecting frame and rotatably connected to the connecting frame.

8. The prestressed tensioning and lifting device according to claim 2, characterized in that: The prestressed tensioning and lifting device further comprises: a leveling mechanism configured on the power mechanism to adjust the cantilever mechanism to a horizontal posture; The leveling mechanism comprises: a support assembly arranged on the connecting frame, a telescopic unit hinged to the support assembly, and a hinge seat sleeved on the outside of the suspension shaft and hinged to the telescopic rod of the telescopic unit.

9. The prestressed tensioning and lifting device according to claim 1, characterized in that: The cantilever mechanism includes: a first drive component, a first cantilever controlled by the first drive component and rotating in a first horizontal plane, a second drive component arranged at an end of the first cantilever away from the first drive component, a second cantilever controlled by the second drive component and rotating in a second horizontal plane, and a suspension device arranged at the second cantilever and suspending the tensioning device to move along the length direction of the second cantilever.

10. The prestressed tensioning and lifting device according to claim 2, characterized in that: The prestressed tensioning and lifting device further comprises: an anti-falling mechanism arranged on the power mechanism; The anti-falling mechanism comprises: a shell arranged on the connecting frame and penetrated by the transmission shaft, an anti-falling device arranged on the shell, and a transmission component arranged inside the shell and connected to the anti-falling device to prevent the transmission shaft from rotating.

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