Prestress tensioning and lifting equipment

Abstract

The invention provides prestress tensioning and lifting equipment. The prestress tensioning and lifting equipment comprises a load hanging shaft, a power mechanism, a cantilever mechanism and a leveling mechanism. The power mechanism comprises a cross rod, transmission shafts arranged on the two sides of the cross rod and parallel to the load hanging shaft, and connecting frames arranged at the two ends of the cross rod in the length direction. The leveling mechanism comprises a supporting arm arranged on the connecting frame, at least two telescopic units arranged at intervals in the transverse direction and a supporting base hinged to the fixed ends of the telescopic units, and telescopic rods of the telescopic units are hinged to the load hanging shaft so as to drive the load hanging shaft to rotate along the axis of the load hanging shaft. The two ends of the supporting base in the lengthwise direction are arranged on the supporting arm and the transverse rod respectively, and the supporting base is formed on the outer side of the transmission shaft. By means of the leveling mechanism, counter-acting force is evenly dispersed to the supporting arms and the transverse rod in the telescopic process of the telescopic unit, stable supporting is provided for the telescopic unit, and structural deformation or damage caused by too large stress of a single supporting component is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of construction machinery, 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, housing key equipment such as the reactor and steam generator. The main structure of the containment is usually cast from high-strength concrete to ensure that the containment can provide sufficient structural strength to protect the internal equipment. The containment is usually divided into two parts: 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. 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 strands of the containment.

[0003] In order to enhance the safety and stability of the containment concrete structure, prestressed tensioning technology is usually adopted 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, it is necessary to build a working platform for installing tensioning equipment such as jacks along the facade of the containment buttresses to ensure that the workers 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 existing construction platforms, the guide rails are usually fixed to the buttresses of the containment only by embedded parts and are arranged at intervals of two along the horizontal 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] Chinese utility model patent publication number CN211548700U discloses a prestressed construction platform for an inner factory building. The platform comprises two spaced-apart guide rails installed along the facade of the inner factory building's buttresses. A construction platform is mounted on the rails via a lifting drive mechanism, allowing it to rise and fall along the rails. A separate hoist mechanism, independent of the construction platform, is also mounted on the rails, sliding along the rails. This prior art prestressed construction platform for an inner factory building features two second telescopic cylinders installed at intervals on the drive shaft housing of a climbing assembly located at the bottom. The piston rod heads of the two second telescopic cylinders are hingedly connected to the load-bearing frame. The two second telescopic cylinders level the telescopic boom via the load-bearing frame, thereby controlling the horizontal position of the hoist mechanism.

[0005] However, in the above-mentioned prior art prestressed construction platform for the internal factory building, during the leveling process of the hoist device, the piston rod of the second telescopic oil cylinder is extended and retracted to drive the load-bearing frame to rotate. During the extension and retraction action, the piston rod of the second telescopic oil cylinder applies a driving force to the load-bearing frame. At the same time, the end of the second telescopic oil cylinder opposite to the piston rod is connected to the transmission shaft housing and forms a support end. During the leveling process, the support end is subjected to the reaction force generated by the extension and retraction of the piston rod, and the reaction force is transmitted to the transmission shaft housing. When the reaction force is large, it may exceed the bearing capacity of the transmission shaft housing, causing the transmission shaft housing to deform, thereby affecting the normal operation of the transmission shaft. In severe cases, it may cause the transmission shaft to bend and deform. If the transmission shaft bends and deforms, its fatigue resistance will be reduced and the risk of fracture will increase. Once the transmission shaft breaks, the hoist device will lose control, posing a safety hazard.

[0006] In view of this, it is necessary to improve the prestressed construction platform of the inner factory building in the existing technology to solve the above problems. Summary of the Invention

[0007] The purpose of the present invention is to disclose a prestressed tensioning and lifting device for solving the many defects of the prestressed construction platform of the internal factory building in the prior art, especially to avoid deformation or damage of the structure caused by excessive force on a single supporting component.

[0008] To achieve the above-mentioned object, the present invention provides a prestressed tensioning and lifting device, comprising: a hanging shaft, a power mechanism disposed on both sides of the hanging shaft, a cantilever mechanism disposed at both ends of the hanging shaft for suspending the tensioning device, and a leveling mechanism disposed on the power mechanism for adjusting the cantilever mechanism to a horizontal posture;

[0009] The power mechanism includes: a crossbar, a transmission shaft arranged on both sides of the crossbar and parallel to the suspension shaft, and a connecting frame arranged at both ends of the crossbar in the longitudinal direction;

[0010] The leveling mechanism includes: a support arm configured on the connecting frame, at least two telescopic units spaced apart in a transverse direction, and a support base hinged to a fixed end of the telescopic unit, wherein the telescopic rod of the telescopic unit is hinged to the suspension shaft to drive the suspension shaft to rotate along its axis;

[0011] The two ends of the support base along the longitudinal direction thereof are respectively arranged on the support arm and the cross bar, and the support base is formed on the outer side of the transmission shaft.

[0012] As a further improvement of the present invention, the leveling mechanism is configured as a power mechanism on top of the suspension shaft.

[0013] As a further improvement of the present invention, the telescopic units are symmetrically arranged on both sides of the cross bar.

[0014] As a further improvement of the present invention, the leveling mechanism further comprises: fixing seats arranged at both ends of the support arm in the length direction and connected to the top of the connection frame;

[0015] The support arm is arranged parallel to the cross bar.

[0016] As a further improvement of the present invention, the leveling mechanism further comprises: a positioning sleeve sleeved on the outside of the suspension shaft, the positioning sleeve being constructed with a protruding hinge portion hinged to the telescopic rod of the telescopic unit;

[0017] The inner peripheral wall of the positioning sleeve is recessed to form a limiting groove, and the suspension shaft is constructed with a positioning block extending into the limiting groove.

[0018] As a further improvement of the present invention, 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 the rack formed on the outside of the guide rail and formed in the connecting frame, and a plurality of sets of guide wheels symmetrically arranged on the inner side wall of the connecting frame and rotatably connected to the connecting frame, and the transmission shaft passes through the connecting frame and is rotatably connected to the connecting frame.

[0019] 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 within a first horizontal plane, a second drive component arranged at one end of the first cantilever away from the first drive component, a second cantilever controlled by the second drive component and rotating within 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.

[0020] As a further improvement of the present invention, the prestressed tensioning and lifting equipment further comprises: an anti-falling mechanism configured on the power mechanism;

[0021] The anti-fall mechanism includes: a shell configured on the cross bar and penetrated by the transmission shaft, an anti-fall device configured on the shell, and a transmission assembly arranged in the shell and connected to the anti-fall device to limit the rotation of the transmission shaft.

[0022] As a further improvement of the present invention, the prestressed tensioning and lifting equipment further comprises: a pivoting mechanism rotatably connecting the power mechanism and the suspension shaft;

[0023] The pivot mechanism includes: at least two mounting plates sleeved on the weight-bearing shaft and rotatably connected to the weight-bearing shaft; both ends of the mounting plates in the length direction are penetrated by transmission shafts close to both sides of the weight-bearing shaft and rotatably connected to the transmission shafts.

[0024] As a further improvement of the present invention, the mounting plates are symmetrically arranged on both sides of the suspension shaft close to the cantilever mechanism.

[0025] Compared with the prior art, the beneficial effects of the present invention are: the support seat serves as a connecting piece between the support arm and the cross bar, and can evenly distribute the reaction force to the support arm and the cross bar during the extension and retraction of the telescopic unit, so as to provide stable support for the telescopic unit, avoid excessive force on a single supporting component causing structural deformation or damage, thereby ensuring the structural integrity of the prestressed tensioning and lifting equipment, thereby solving the problem in the prior art that the drive shaft of the prestressed construction platform in the inner factory building is locally subjected to excessive force during the leveling process, causing the drive shaft to bend and deform, thereby reducing safety hazards. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is an overall schematic diagram of the prestressed tensioning and lifting equipment disclosed in the present invention;

[0027] Figure 2 This is the main view of the connection between the power mechanism and the suspension shaft;

[0028] Figure 3 for Figure 2 Cross-sectional view of the telescopic unit and the suspension axis in the middle FF direction;

[0029] Figure 4 It is a partial schematic diagram of the cantilever mechanism configured at the end of the suspension shaft;

[0030] Figure 5 for Figure 2 Cross-sectional view of the transmission shaft and transmission gear taken along the AA axis;

[0031] Figure 6 for Figure 5 Cross-sectional view of the transmission shaft and transmission gear cut along the BB axis;

[0032] Figure 7 A side view of a guide rail for prestressed tensioning lifting equipment located on the exterior facade of the containment shell buttress;

[0033] Figure 8 Side view of the guide rails for the prestressed tensioning hoisting equipment to climb to the exterior facade of the hemispherical dome buttresses of the containment vessel;

[0034] Figure 9 A schematic diagram of extending the telescopic rod of the telescopic unit to adjust the horizontal posture of the cantilever mechanism and the tensioning equipment suspended therefrom;

[0035] Figure 10 for Figure 1 The enlarged view of the part shown in the middle circle G;

[0036] Figure 11This is the front view of the guide wheels formed on both sides of the guide rail and the power gear engaged with the rack. DETAILED DESCRIPTION

[0037] The present invention is described in detail below with reference to 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 this field based on these embodiments are all within the scope of protection of the present invention.

[0038] 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.

[0039] Please refer to Figures 1 to 11 A specific embodiment of a prestressed tensioning lifting device (hereinafter referred to as "lifting device 100") is disclosed.

[0040] It should be noted that the containment vessel 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 set in the containment vessel and protrude from the shell wall of the containment vessel. 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). Figure 11 As shown, two guide rails 200 are arranged at intervals along the horizontal direction on the facade of the buttress. Figure 7 As shown, the guide rail 200 of the buttress column provided on the cylinder is perpendicular to the horizontal plane H, and the lifting device 100 moves up and down along the guide rail 200 in the vertical plane. Figure 8 As shown, the guide rails 200a provided on the buttresses of the hemispherical dome are arranged along the curved surface of the hemispherical dome, and the lifting device 100 performs lifting motion along the guide rails 200a on the curved surface of the buttresses of the hemispherical dome.

[0041] Ginseng Figure 1 and Figure 2As shown, in this embodiment, the prestressed tensioning lifting device 100 includes: a suspension shaft 1, a power mechanism 2 disposed on both sides of the suspension shaft 1, a cantilever mechanism 4 disposed at both ends of the suspension shaft 1 to suspend a tensioning device (not shown), and a leveling mechanism 5 disposed on the power mechanism 2 to adjust the cantilever mechanism 4 to a horizontal position. The suspension shaft 1 is parallel to the horizontal plane H and serves as the core support member of the lifting device 100, bearing the weight of the cantilever mechanism 4 and other components, and providing a mounting base for other components (such as the power mechanism 2 and the cantilever mechanism 4). The power mechanism 2 provides power to drive the suspension shaft 1 and the cantilever mechanism 4 disposed at the end of the suspension shaft 1 and suspending the tensioning device (e.g., a jack) to rise and fall along the guide rail 200. Two sets of cantilever mechanisms 4 are configured, one at each axial end of the suspension shaft 1. The cantilever mechanisms 4 are used to suspend the tensioning device and drive the tensioning device to the operating position. The leveling mechanism 5 drives the suspension shaft 1 to rotate along the axis P, 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.

[0042] Ginseng Figure 1 As shown, preferably, the lifting device 100 includes two power mechanisms 2, and the two power mechanisms 2 are symmetrically arranged along the axis P of the hanging shaft 1. During the lifting process of the lifting device 100, the two symmetrically arranged power mechanisms 2 work together to drive the hanging shaft 1 to rise and fall along the guide rail 200, and can evenly share the load, improve the balance of the lifting device 100, and ensure that the lifting device 100 can rise or fall smoothly.

[0043] Ginseng Figure 2 As shown, the power mechanism 2 includes: a cross bar 211, a transmission shaft 22 arranged on both sides of the cross bar 211 and parallel to the suspension shaft 1, and a connecting frame 212 arranged at both ends of the length direction of the cross bar 211; the leveling mechanism 5 includes: a support arm 511 arranged on the connecting frame 212, at least two telescopic units 52 arranged at intervals along the transverse direction, and a support seat 512 hinged to the fixed end 522 of the telescopic unit 52, the telescopic rod 521 of the telescopic unit 52 is hinged to the suspension shaft 1 to drive the suspension shaft 1 to rotate along its axis P; the support seat 512 is respectively arranged at the support arm 511 and the cross bar 211 at both ends along its longitudinal direction, and the support seat 512 is formed on the outside of the transmission shaft 22.

[0044] The telescopic unit 52 extends or contracts by driving the telescopic rod 521 to rotate the weight shaft 1 along the axis P. The weight shaft 1 simultaneously rotates the cantilever mechanism 4, thereby adjusting the horizontal posture of the cantilever mechanism 4 and the tensioning equipment suspended therefrom. The fixed end 522 of the telescopic unit 52 is hinged to the support base 512, which serves as a connector between the support arm 511 and the crossbar 211. This allows the support base 512 to provide stable support for the telescopic unit 52 during the telescopic rod 521's extension and retraction process, preventing the telescopic unit 52 from shaking or shifting due to unstable support during the extension and retraction process, thereby improving the accuracy and stability of the leveling of the weight shaft 1.

[0045] Ginseng Figure 2 and Figure 9 As shown, in this embodiment, the support arm 511 and the crossbar 211 are stably connected by the connecting frame 212, and the relative position between the support arm 511 and the crossbar 211 is fixed, thereby enhancing the structural stability of the entire leveling mechanism 5. Compared with the existing internal factory building prestressed construction platform, a certain reaction force is generated when controlling the piston rod of the second telescopic oil cylinder to perform telescopic action, and the reaction force is concentrated on the transmission shaft housing, resulting in excessive local force on the transmission shaft during the leveling process, causing the transmission shaft to bend and deform, thereby reducing safety hazards. The lifting device 100 uses the support seat 512 to evenly distribute the reaction force F2 generated during the telescopic unit 52 driving the telescopic rod 521 to the support arm 511 and the crossbar 211, so as to avoid excessive force on a single supporting component (such as the support arm 511 or the crossbar 211) causing structural deformation or damage, thereby ensuring the structural integrity of the lifting device 100. The support structure, consisting of the crossbar 211, the connecting frame 212, the support arm 511, and the support base 512, provides stable support for the telescopic unit 52 during the leveling process and evenly distributes the reaction force F2, thereby ensuring the accuracy and reliability of the leveling process for the suspension axis 1. Furthermore, the support base 512 is formed outside the transmission shaft 22 and does not contact the transmission shaft 22, thereby preventing the reaction force F2 from being directly or indirectly applied to the transmission shaft 22, thereby preventing localized force on the transmission shaft 22 from causing structural deformation or damage.

[0046] When the lifting device 100 is lifted and lowered along the guide rail 200 of the buttress column of the cylinder, the telescopic unit 52 drives the telescopic rod 521 to shorten, thereby driving the positioning sleeve 53 to drive the suspension shaft 1 to rotate along the axis P, and synchronously drives the cantilever mechanism 4 to rotate until the cantilever mechanism 4 and the tensioning device suspended therefrom are adjusted to Figure 7 The telescopic rod 521 is then held in a horizontal position parallel to the horizontal plane H by the telescopic unit 52. Figure 7The shortened state shown in the figure is used to control the tensioning equipment to always maintain a horizontal posture during the working process, thereby ensuring that the tensioning equipment always maintains a horizontal posture during the working process when the guide rail 200 of the buttress column of the cylinder is in the horizontal position to ensure construction accuracy.

[0047] Ginseng Figure 8 As shown, 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 device suspended therefrom will tilt relative to the horizontal plane H and change to an inclined posture (this state is not shown), and the telescopic unit 52 drives the telescopic rod 521 to extend, thereby driving the positioning sleeve 53 to drive the suspension shaft 1 to rotate along the axis P, and synchronously drives the cantilever mechanism 4 to rotate, so as to adjust the cantilever mechanism 4 and the tensioning device suspended therefrom to the following: Figure 8 The horizontal posture shown is parallel to the horizontal plane H to adapt to the curvature change of the guide rail 200a and avoid the tensioning device from tilting 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 8 , the tensioning device is controlled to maintain a horizontal position during operation, thereby ensuring that the tensioning device remains horizontal during operation on the guide rail 200 of the hemispherical dome buttress column to ensure construction accuracy. The reaction force F2 generated by the telescopic unit 52 driving the telescopic rod 521 to extend or contract is evenly distributed to the support arm 511 and crossbar 211 through the support base 512, thereby reducing local stress concentration, avoiding material fatigue and damage caused by local stress concentration, and extending service life.

[0048] Ginseng Figure 2As shown, the power mechanism 2 also includes: a first drive motor 23 configured on the crossbar 211 to drive the transmission shaft 22 to rotate, a power gear 24 coaxially sleeved on both ends of the transmission shaft 22 and meshing with a rack (not shown) formed on the outside of the guide rail 200 and formed in the connecting frame 212, and a plurality of guide wheels 25 symmetrically arranged on the inner side wall of the connecting frame 212 and rotatably connected to the connecting frame 212, and the transmission shaft 22 passes through the connecting frame 212 and is rotatably connected to the connecting frame 212. The guide rail 200 of this embodiment adopts an I-beam structure, and guide grooves (not shown) are formed on both sides of the guide rail 200. 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, the transmission shaft 22 rotates relative to the connecting frame 21. The transmission shaft 22 simultaneously drives the power gears 24 at both ends to rotate. The power gears 24 at both ends of the transmission shaft 22 respectively engage with the racks on the outside of the guide rail 200, causing the power gears 24 to move along the racks on the outside of the guide rail 200. The guide wheels 25 are respectively located in the guide grooves on both sides of the guide rail 200. When the lifting device 100 is raised or lowered, the guide wheels 25 are synchronously driven to move along the guide grooves on both sides of the guide rail 200. The guide wheels 25 are rotatably connected to the connecting frame 212 via self-lubricating bearings, allowing the guide wheels 25 to smoothly move up and down along the guide rail 200. The symmetrical arrangement of the guide wheels 25 ensures that the lifting device 100 remains stable during the lifting process, reducing shaking and deviation.

[0049] Ginseng Figure 1 and Figure 2 and Figure 9 As shown, preferably, the leveling mechanism 5 is configured on the power mechanism 2 at the top of the suspension shaft 1. The telescopic unit 52 is configured on the crossbar 211 included in the power mechanism 2 at the top of the suspension shaft 1. When the telescopic rod 521 of the telescopic unit 52 is extended or shortened, the driving force F1 generated is transmitted to the suspension shaft 1 through the hinge point formed by the telescopic rod 521 of the telescopic unit 52 and the suspension shaft 1, thereby driving the suspension shaft 1 to rotate along its axis, thereby adjusting the horizontal posture of the cantilever mechanism 4 and the suspended tensioning equipment. By configuring a leveling mechanism 5 on the top of the load-bearing shaft 1, the driving force F1 generated when the telescopic unit 52 drives the telescopic rod 521 to extend is transmitted from the top downward, and the load-bearing shaft 1 transmits the driving force to the cantilever mechanism 4 during the rotation process. Since the load-bearing shaft 1 serves as the core support component of the lifting equipment 100, the driving force F1 can be evenly distributed to the load-bearing shaft 1 and the cantilever mechanism 4 configured therewith, which helps to improve the leveling accuracy of the cantilever mechanism 4 and the tensioning equipment suspended therefrom, and ensures that the cantilever mechanism 4 and the tensioning equipment suspended therefrom can maintain a more stable horizontal posture.

[0050] In this embodiment, preferably, Figure 1 and Figure 2 and Figure 9As shown, the telescopic units 52 are symmetrically arranged on both sides of the crossbar 211. This symmetrical arrangement of the telescopic units 52 ensures that the reaction force F2 generated during the leveling process is evenly distributed along the length of the crossbar 211 and support arm 511 via the support base 512, preventing excessive reaction force F2 from being applied to one side, thereby reducing localized stress and the risk of bending deformation. Furthermore, the symmetrical arrangement of the telescopic units 52 allows for more precise control of the rotation of the suspension shaft 1, ensuring a more stable horizontal posture for the cantilever mechanism 4 and its suspended tensioning equipment, and mitigating imbalance issues caused by unilateral leveling.

[0051] Ginseng Figure 2 and Figure 9 As shown, the leveling mechanism 5 also includes: a fixing seat 513 disposed at both ends of the support arm 511 in the longitudinal direction and connected to the top of the connecting frame 212. The two ends of the support arm 511 are connected to the top of the connecting frame 212 through the fixing seat 513, and the fixing seat 513 is connected to the connecting frame 212 by bolts to ensure a firm connection and enhance the overall rigidity of the leveling mechanism 5. The crossbar 211 is arranged in a transverse direction and parallel to the suspension axis 1, and the support arm 511 is arranged parallel to the crossbar 211, so that during the leveling process, the reaction force F2 generated by the telescopic rod 521 of the telescopic unit 52 is evenly distributed to the support arm 511 and the crossbar 211 through the support seat 512, and the reaction force F2 can be evenly distributed between the two parallel components (i.e., the support arm 511 and the crossbar 211), avoiding the situation where excessive force is applied to one side, thereby reducing local deformation and shaking.

[0052] Ginseng Figure 2 and Figure 3 and Figure 9 As shown, the leveling mechanism 5 further includes a positioning sleeve 53 sleeved around the outside of the weighted shaft 1. The positioning sleeve 53 is constructed with a protruding hinge 531 that is hingedly connected to the telescopic rod 521 of the telescopic unit 52. A retaining groove 532 is recessed on the inner circumference of the positioning sleeve 53, and the weighted shaft 1 is constructed with a positioning block 11 that extends into the retaining groove 532. The protruding hinge 531 on the positioning sleeve 53 is hingedly connected to the telescopic rod 521 of the telescopic unit 52, thereby ensuring a stable connection between the telescopic rod 521 and the weighted shaft 1. When the telescopic unit 52 drives the telescopic rod 521 to extend or contract, thereby driving the positioning sleeve 53 to rotate, the retaining groove 532 cooperates with the positioning block 11 to accurately transmit the rotation of the positioning sleeve 53 to the weighted shaft 1, thereby simultaneously driving the rotation of the weighted shaft 1. This ensures accurate transmission of the weighted shaft 1 and avoids leveling errors caused by inaccurate transmission. And in the process of extending or shortening the telescopic rod 521, the driving force F1 generated is transmitted to the suspension shaft 1 through the positioning sleeve 53, and the driving force F1 is evenly distributed to the suspension shaft 1 and its configured cantilever mechanism 4 through the positioning sleeve 53 to improve the leveling accuracy and ensure that the horizontal posture of the cantilever mechanism 4 and its suspended tensioning equipment is more stable.

[0053] Ginseng Figure 4 and Figure 7 and Figure 8 As shown, the cantilever mechanism 4 includes: a first drive assembly 41; a first cantilever 42 controlled by the first drive assembly 41 and rotatable within a first horizontal plane H1; a second drive assembly 43 disposed at an end of the first cantilever 42 remote from the first drive assembly 41; a second cantilever 44 controlled by the second drive assembly 43 and rotatable within a second horizontal plane H2; and a suspension device 45 (e.g., an electric hoist) disposed on the second cantilever 44 and suspending the tensioning device for movement along the length of the second cantilever 44. The first cantilever 42 and the second cantilever 44 are located on two different parallel planes, with the first horizontal plane H1 and the second horizontal plane H2 being parallel to each other, thereby ensuring the overall leveling accuracy of the cantilever mechanism 4. The first drive assembly 41 is used to drive the first cantilever 42 and its associated second drive assembly 43 to rotate within the first horizontal plane H1. The second drive assembly 43 is used to drive the second cantilever 44 and its associated suspension device 45 to rotate within the second horizontal plane H2. The suspension device 45 suspends the tensioning device along the length of the second cantilever 44 to move the tensioning device to the desired position, allowing the tensioning device to cover a larger working area and increasing the operating range of the lifting device 100. The cantilever mechanism 4 also includes a connecting hoop 46 that is mounted on the outside of a portion of the suspension shaft 1 and is in contact with the suspension shaft 1. The connecting hoop 46 is connected to the first mounting seat 411 via bolts to ensure a stable connection between the cantilever mechanism 4 and the suspension shaft 1.

[0054] Ginseng Figure 1 and Figure 4As shown, the first drive assembly 41 includes: a first mounting seat 411, a first rotary bearing 412 with an inner ring fixed to the first mounting seat 411, an outer ring of the first rotary bearing 412 fixed to the first cantilever 42, a first rotary gear 413 sleeved on the outer side of the first rotary bearing 412, a second drive motor 414 configured on the first mounting seat 411, and a first driving gear 415 configured on the output shaft of the second drive motor 414 and meshing with the first rotary gear 413; the second drive assembly 43 includes: a second mounting seat 431, a second rotary bearing 432 with an inner ring fixed to the second mounting seat 431, an outer ring of the second rotary bearing 432 fixed to the second cantilever 44, a second rotary gear 433 sleeved on the outer side of the second rotary bearing 432, a third drive motor 434 configured on the second mounting seat 431, and a second driving gear 435 configured on the output shaft of the third drive motor 434 and meshing with the second rotary gear 433. The second drive motor 414 drives the first rotating gear 413 to rotate via the first driving gear 415 on its output shaft. The first rotating gear 413 drives the first cantilever 42 and the second driving assembly 43 configured therein to rotate within the first horizontal plane H1 via the first rotating bearing 412. The third drive motor 434 drives the second rotating gear 433 to rotate via the second driving gear 435 on its output shaft. The second rotating gear 433 drives the second cantilever 44 and the suspension device 45 configured therein to rotate within the second horizontal plane H2 via the second rotating bearing 432, thereby driving the tensioning device to move to the desired position via the suspension device 45, so that the tensioning device can cover a larger working area.

[0055] Ginseng Figure 2 and Figure 3 As shown, the prestressed tensioning and lifting equipment 100 further includes a pivot mechanism 6 that rotatably connects the power mechanism 2 to the load-bearing shaft 1. The pivot mechanism 6 connects the power mechanism 2 to the load-bearing shaft 1, allowing the power mechanism 2 to drive the load-bearing shaft 1 along the guide rail 200 via the pivot mechanism 6. This facilitates the leveling mechanism 5 to drive the load-bearing shaft 1 to rotate along the axis P relative to the pivot mechanism 6, and simultaneously drives the cantilever mechanism 4 to rotate, thereby adjusting the cantilever mechanism 4 and the tensioning equipment suspended therefrom to a horizontal position parallel to the horizontal plane H. 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 connected by rotating the pivot mechanism 6. The power mechanism 2 can be rotated and the angle changed through the pivot mechanism 6 to enable the power mechanism 2 to 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 thus enabling the power mechanism 2 to be stably lifted and lowered along the guide rail 200a.

[0056] Ginseng Figure 2 and Figure 3As shown, the pivot mechanism 6 includes at least two mounting plates 61 that are sleeved on and rotatably connected to the suspension shaft 1. The mounting plates 61 have transmission shafts 22 located near the sides of the suspension shaft 1 extending through their respective lengths and are rotatably connected to the transmission shafts 22. The mounting plates 61 are rotatably connected to the suspension shaft 1, enabling the mounting plates 61 to support the smooth rotation of the suspension shaft 1 and the cantilever mechanism 4. This facilitates the leveling mechanism 5 in driving the suspension shaft 1 to rotate along the axis P relative to the mounting plates 61 to adjust the horizontal posture of the cantilever mechanism 4 and the tensioning equipment suspended therefrom. This allows the lifting apparatus 100 to adapt to complex construction environments, improving its adaptability and flexibility.

[0057] Ginseng Figure 2 and Figure 9 As shown, the mounting plates 61 are symmetrically arranged on both sides of the suspension shaft 1 near the cantilever mechanism 4. The symmetrical mounting plates 61 provide symmetrical support points on both sides of the suspension shaft 1, allowing the suspension shaft 1 to rotate more stably when subjected to the driving force F1 generated during the extension or contraction of the telescopic rod 521. This ensures a more even distribution of the driving force F1 on the suspension shaft 1, reducing structural deformation and stress concentration caused by excessive driving force F1 on one side of the suspension shaft 1.

[0058] Ginseng Figure 1 and Figure 5 and Figure 6 As shown, the prestressed tensioning lifting device 100 further includes an anti-fall mechanism 3 disposed within the power mechanism 2. The anti-fall mechanism 3 includes a housing 31 disposed within the crossbar 211 and penetrated by the transmission shaft 22, an anti-fall device 32 disposed within the housing 31, and a transmission assembly disposed within the housing 31 and connected to the anti-fall device 32 to restrict the rotation of the transmission shaft 22. In the event of an emergency within the lifting device 100, the anti-fall device 32 quickly locks the transmission assembly, preventing the transmission shaft 22 from rotating and simultaneously preventing the power gears 24 at both ends of the transmission shaft 22 from further movement along the guide rail 200, thereby preventing the lifting device 100 from falling uncontrollably. The transmission assembly includes a transmission gear 33 coaxially sleeved on the transmission shaft 22, and a speed-increasing gear 35 disposed within the housing 31 and rotationally connected to the housing 31. The anti-fall device 32 is configured with a brake gear 34 that meshes 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.

[0059] Under normal working conditions, the first drive motor 23 drives the power gear 24 to move along the guide rail 200 through the transmission shaft 22 to drive the lifting device 100 to move up and down. 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. When the anti-fall device 32 detects the emergency, it starts and quickly locks the brake gear 34. Since the brake gear 34 is engaged with the speed-increasing gear 35, the speed-increasing gear 35 is limited to rotate by 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.

[0060] The speed-increasing gear 35 ensures synchronous engagement between the transmission gear 33 and the brake gear 34, preventing slippage or incomplete engagement between the transmission gear 33 and the brake gear 34 during emergency braking. This also makes the emergency braking process smoother and reduces the impact during emergency braking. Furthermore, the speed-increasing gear 35 increases the rotational speed of the brake gear 34 relative to the transmission gear 33, thereby accelerating the response speed of the anti-fall device 32 in detecting a stall of the transmission shaft 22, thereby quickly locking the brake gear 34 to prevent the transmission shaft 22 from rotating, further reducing the distance the lifting device 100 falls uncontrollably and making emergency braking more rapid and effective. Preferably, two sets of speed-increasing gears 35 are symmetrically arranged on both sides of the brake gear 34. When the anti-fall mechanism 3 is activated, this ensures uniform braking effects on both sides of the transmission gear 33 during emergency braking, thereby improving the stability of the emergency braking process.

[0061] Ginseng Figure 6 As shown, illustratively, the fall arrester 32 is constructed with a sensing shaft 321 extending into the housing 31, and the brake gear 34 is fixedly mounted on the outside of the sensing shaft 321. The sensing shaft 321 rotates synchronously with the brake gear 34. When the fall arrester 32 detects an emergency, it is activated and quickly locks the sensing shaft 321 to prevent the brake gear 34 from rotating. It should be noted that the specific structure of the fall arrester 32 in this embodiment is conventional 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, any structure is acceptable.

[0062] Ginseng Figure 1 and Figure 2As shown, in this embodiment, the anti-fall mechanism 3 is preferably disposed within the power mechanism 2 at the bottom of the suspending shaft 1, and the transmission gear 33 is sleeved around the outside of the transmission shaft 22 at the bottom of the connecting frame 21. By arranging the anti-fall mechanism 3 within the power mechanism 2 at the bottom of the suspending shaft 1, the braking mechanism can be quickly triggered in an emergency, locking the brake gear 34 to prevent the transmission shaft 22 from rotating, thereby reducing the distance that the lifting device 100 would otherwise fall uncontrollably. Furthermore, the available space within the lifting device 100 can be fully utilized, avoiding an increase in overall size and maintaining the compactness of the device.

[0063] It should be noted that the telescopic unit 52 can be configured as a telescopic device such as a hydraulic cylinder, an electric push rod, a pneumatic cylinder or an electric screw, as long as it can drive the suspension shaft 1 to rotate along its axis P through a telescopic action to adjust the inclination angle of the cantilever mechanism 4 and its suspended tensioning equipment relative to the horizontal plane H, so as to achieve the adjustment of the cantilever mechanism 4 and its suspended tensioning equipment to a horizontal posture parallel to the horizontal plane H as shown in Figure *.

[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 present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0066] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method 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 can also be appropriately combined to form other implementation methods 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 for suspending a tensioning device, and a leveling mechanism disposed on the power mechanism for adjusting the cantilever mechanism to a horizontal posture; The power mechanism comprises: a crossbar, a transmission shaft arranged on both sides of the crossbar and parallel to the suspension shaft, and a connection frame arranged at both ends of the crossbar in the length direction; The leveling mechanism comprises: a support arm arranged on the connection frame, at least two telescopic units spaced apart in the transverse direction, and a support seat hinged to the fixed end of the telescopic unit, the telescopic rod of the telescopic unit being hinged to the suspension shaft to drive the suspension shaft to rotate along its axis; The two ends of the support seat along the longitudinal direction are respectively arranged on the support arm and the cross bar, and the support seat is formed on the outer side of the transmission shaft.

2. The prestressed tensioning and lifting equipment according to claim 1, characterized in that: The leveling mechanism is a power mechanism configured at the top of the suspension shaft.

3. The prestressed tensioning and lifting equipment according to claim 1, characterized in that: The telescopic units are symmetrically arranged on both sides of the cross bar.

4. The prestressed tensioning and lifting equipment according to claim 2, characterized in that: The leveling mechanism further includes: fixing seats disposed at both ends of the support arm in the length direction and connected to the top of the connection frame; The support arm is arranged parallel to the cross bar.

5. The prestressed tensioning and lifting equipment according to claim 1, characterized in that: The leveling mechanism further comprises: a positioning sleeve sleeved on the outside of the suspension shaft, the positioning sleeve being configured with a protruding hinge portion hingedly connected to the telescopic rod of the telescopic unit; The inner peripheral wall of the positioning sleeve is recessed to form a limiting groove, and the suspension shaft is constructed with a positioning block extending into the limiting groove.

6. The prestressed tensioning and lifting equipment according to claim 1, characterized in that: The power mechanism also includes: a first driving 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, and the transmission shaft passes through the connecting frame and is rotatably connected to the connecting frame.

7. The prestressed tensioning and lifting equipment according to claim 6, 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.

8. The prestressed tensioning and lifting equipment according to claim 6, characterized in that: The prestressed tensioning and lifting equipment further comprises: an anti-falling mechanism configured on the power mechanism; The anti-fall mechanism comprises: a shell arranged on the cross bar and penetrated by the transmission shaft, an anti-fall device arranged on the shell, and a transmission component arranged inside the shell and connected to the anti-fall device to limit the rotation of the transmission shaft.

9. The prestressed tensioning and lifting equipment according to claim 6, characterized in that: The prestressed tensioning and lifting equipment further comprises: a pivot mechanism rotatably connecting the power mechanism and the suspension shaft; The pivot mechanism comprises: at least two mounting plates sleeved on the weight-suspending shaft and rotatably connected to the weight-suspending shaft, and both ends of the mounting plates in the length direction are penetrated by transmission shafts close to both sides of the weight-suspending shaft and rotatably connected to the transmission shafts.

10. The prestressed tensioning and lifting equipment according to claim 9, characterized in that: The mounting plates are symmetrically arranged on two sides of the suspension shaft close to the cantilever mechanism.

Images