Lifting platform for welding of building heating pipes

Abstract

The application is a lifting platform for building heating pipeline welding, and relates to the technical field of building decoration engineering construction, comprising a mobile reference frame, a translation stable component arranged on the mobile reference frame, a positioning reference platform arranged on the mobile reference frame, a lifting component arranged on the mobile reference frame, and a positioning reference mechanism arranged on the positioning reference platform; a stable reference frame is arranged on the other side of the mobile reference frame, a mobile stable component is arranged on the stable reference frame, a stable support component is arranged on the stable reference frame, and a stable lifting mechanism is arranged on the stable reference frame. The application is carefully designed based on the heating pipeline demand of special buildings such as hospitals through a series of innovative structural designs, significantly improves the safety, efficiency and quality of high-altitude welding, and can perfectly adapt to the complex and changeable working environment inside hospital buildings, providing an ideal solution for the heating pipeline laying and welding engineering of special buildings such as hospitals.

Description

Technical Field

[0001] This invention relates to the technical field of building decoration engineering construction, and in particular to a lifting platform for welding building heating, ventilation and air conditioning pipes. Background Technology

[0002] In modern architecture, especially in specialized buildings such as hospitals, the design and construction of heating, ventilation, and air conditioning (HVAC) systems are crucial. As key locations providing medical services, hospitals must maintain a high level of cleanliness, suitable temperature and humidity to ensure effective patient care and the comfort of medical staff. HVAC ductwork, as a core component of hospital building environmental control, is critically important; its installation and welding not only affect system efficiency but also directly impact the quality of medical services and the patient's recovery process.

[0003] Hospital buildings have complex and extensive HVAC systems, encompassing multiple subsystems such as heating, ventilation, and air conditioning. These pipes often need to be laid over long distances and at multiple levels within the building, especially in hard-to-reach areas such as ceilings, walls, and basements. Traditional pipe welding methods, such as using scaffolding or simple lifting equipment, are not only inefficient but also pose safety hazards, failing to meet the high standards and stringent requirements of hospital buildings for HVAC pipe installation. Moreover, hospitals have extremely high safety requirements; sparks must not be generated during HVAC pipe welding to prevent fires or explosions. Furthermore, it is essential to minimize the impact of noise and dust on other areas during construction.

[0004] Furthermore, with the continuous development of modern building technology, the requirements for welding of building HVAC ducts are also increasing. Traditional welding methods have revealed many shortcomings when dealing with special buildings such as hospitals. For example, in manual welding, it is difficult to ensure accurate positioning of the welding point every time under complex building structures, resulting in inconsistent welding quality. Especially in high-altitude operations, workers need to weld in narrow and unstable spaces for extended periods, which not only tests their professional skills but also poses a serious threat to their lives.

[0005] How to solve the above-mentioned technical problems is the challenge facing this invention. Summary of the Invention

[0006] To address the shortcomings of existing technologies, this invention provides a rationally designed, safe, and reliable lifting platform for welding building HVAC ducts, particularly suitable for positioning and lifting devices used in high-altitude welding operations in special buildings such as hospitals. This device achieves precise positioning and stable lifting of the pipe to be welded through the cooperation of a movable reference frame and a stable reference frame, solving the problems of difficult positioning and poor stability in high-altitude welding operations.

[0007] The technical solution adopted by the present invention to solve its technical problem is: a lifting platform for welding building HVAC pipes, including a movable reference frame, a translation and stabilization component provided on the movable reference frame, a positioning reference platform provided on the movable reference frame that slides with the movable reference frame and is used to facilitate construction personnel to determine the position for high-altitude welding operations, a lifting component provided on the movable reference frame that cooperates with the positioning reference platform, and a positioning reference mechanism provided on the positioning reference platform to facilitate welding operations on the pipe to be welded;

[0008] On the other side of the movable reference frame, a stable reference frame is provided to cooperate with the movable reference frame. The stable reference frame is provided with a movable stabilizing component and a stable support component that cooperates with the positioning reference platform. The stable reference frame is provided with a stable lifting mechanism that cooperates with the positioning reference mechanism and is used to move the pipe to be welded to the part of the pipe to be welded.

[0009] Furthermore, the movable reference frame includes a movable base that cooperates with the translational stabilization component, the movable base is provided with a movable base that cooperates with the positioning reference platform, and the movable base is provided with a stabilizing docking frame that cooperates with the stabilizing reference frame and the stabilizing connection mechanism.

[0010] The translational stabilization assembly includes translational wheels mounted on the movable base, a stabilizing top support unit that contacts the building ceiling mounted on the movable base, and a stabilizing abutment unit that cooperates with the stabilizing top support unit mounted on the movable base.

[0011] The structure of the moving stabilizing component is the same as that of the translating stabilizing component.

[0012] Furthermore, the positioning reference platform includes a reference slide that slides with the movable base frame, and the reference slide is provided with a lifting bracket that cooperates with the lifting assembly. The reference slide is also provided with a positioning rod assembly that cooperates with the movable base frame, and a horizontal adjustment seat is provided at the end of the reference slide facing the stable docking frame.

[0013] The horizontal adjustment base is provided with a fine-tuning platform that slides with the horizontal adjustment base, and the horizontal adjustment base is provided with a horizontal fine-tuning component that cooperates with the fine-tuning platform. The positioning reference mechanism is provided on the fine-tuning platform, and the fine-tuning platform is provided with a receiving rod that is inserted and cooperates with the stable support component.

[0014] The present invention also features that the positioning reference mechanism includes a reference through slot formed on the fine-tuning platform, a rotating positioning frame collinear with the axis of the reference through slot on the fine-tuning platform, a rotating base rotatably engaged with the rotating positioning frame on the rotating positioning frame, and a smooth rotation component on the rotating positioning frame to enable the rotating base to rotate smoothly on the rotating positioning frame.

[0015] The rotating base is provided with a set of positioning telescopic rods whose telescopic direction is consistent with the radial direction of the rotating positioning frame. The telescopic ends of the set of positioning telescopic rods are connected to the same positioning base. The positioning base is provided with a positioning support assembly that contacts the pipeline. The bottom end of the positioning base is provided with a positioning base cylinder, and a positioning guide rail assembly that cooperates with the positioning base cylinder is provided in the positioning base cylinder.

[0016] Furthermore, the rotating positioning frame includes a rotating circular frame disposed on the fine-tuning platform, and the rotating circular frame is provided with a rotating ring seat that cooperates with the smooth rotation component;

[0017] The smooth rotation assembly includes a plurality of smoothing gears disposed on the rotating ring seat and evenly arranged along the circumferential direction of the rotating ring seat, and a drive gear that cooperates with the smoothing gears is disposed on the rotating ring seat, and a drive motor that cooperates with the drive gears is disposed on the rotating ring seat.

[0018] The rotating ring seat is provided with a rotating toothed ring that meshes with the stabilizing gear and the driving gear and is fixedly connected to the rotating base, and the rotating toothed ring is provided with a stabilizing counterweight unit connected to the rotating base;

[0019] The rotating base includes a rotating fixed seat connected to the positioning telescopic rod, and a first connecting frame is provided at the top of the rotating fixed seat, and the first connecting frame is connected to the rotating toothed ring.

[0020] Furthermore, the stable reference frame includes a movable base that cooperates with the movable stabilizing component, a vertical base that cooperates with the stable support component is provided on the movable base, and a stable alignment frame that cooperates with the movable reference frame and the stable connection mechanism is provided on the movable base.

[0021] The stable support assembly includes a support slide that slides with the vertical base frame, and a stable guide rod that slides with the support slide on the vertical base frame. A stable base that cooperates with the positioning reference platform is provided on the support slide. An adjustment base that slides with the stable base is provided on the stable base. A socket cylinder that inserts with the positioning reference platform is provided on the adjustment base. An adjustment groove that slides with the adjustment base is provided on the stable base. An adjustment guide rod that cooperates with the adjustment base is provided in the adjustment groove.

[0022] The present invention also features that the stabilizing lifting mechanism includes a transport frame for transporting the pipe to be welded, the transport frame having a receiving groove for accommodating the positioning guide rail assembly, and the transport frame being provided with a stabilizing locking assembly connected to the moving reference frame and the stabilizing reference frame.

[0023] The transport vehicle frame is equipped with a transport base frame, the positioning guide rail assembly is equipped with a reference guide assembly that cooperates with the transport base frame, the stabilizing reference frame is equipped with an auxiliary lifting assembly that provides driving force for the transport base frame to move vertically along the stabilizing reference frame, and the transport base frame is equipped with a two-stage lifting assembly for lifting the pipe to be welded to the welding position.

[0024] The stabilizing locking assembly includes locking frames symmetrically arranged at both ends of the transport vehicle frame. The locking frames are provided with locking expansion rods that cooperate with the movable reference frame or the stabilizing reference frame. The movable reference frame and the stabilizing reference frame are provided with locking grooves that cooperate with the locking expansion rods.

[0025] The transport frame includes a vertical base, and a first connecting rod that cooperates with the reference guide assembly and a second connecting rod that cooperates with the auxiliary lifting assembly are respectively provided at both ends of the vertical base. A vertical through groove is provided on the vertical base.

[0026] The reference guide assembly includes a reference guide seat, on which several U-shaped rods are vertically arranged. The reference guide seat has limiting grooves that mate with the U-shaped rods, and limiting screws that mate with the limiting grooves. The reference guide seat also has a pressing hydraulic rod that mates with the U-shaped rods. A vertical plate is provided at the moving end of the pressing hydraulic rod, and a vertical roller that mates with the U-shaped rods and facilitates vertical movement of the reference guide seat is provided on the vertical plate. Finally, the reference guide seat has a telescopic control cylinder that mates with the first connecting rod and facilitates adjusting the welding position of the pipeline. A control screw that mates with the first connecting rod is provided on the telescopic control cylinder.

[0027] The auxiliary lifting assembly includes an auxiliary hoisting frame that slides with the stable reference frame. A set of hydraulic drive rods is horizontally arranged on the auxiliary hoisting frame. All of the hydraulic drive rods are connected to the same control plate. The control plate is provided with a control cylinder that cooperates with the second connecting rod. The control cylinder is provided with a control screw that cooperates with the second connecting rod. The stable reference frame is provided with a vertical lifting unit for driving the auxiliary hoisting frame to move vertically.

[0028] Furthermore, the two-stage lifting assembly includes a rotating base frame disposed on the top surface of the vertical base, a lifting frame disposed on the rotating base frame and rotating on the rotating base frame and a rotating unit disposed on the rotating base frame for driving the lifting frame to rotate, a flexible lifting unit disposed on the lifting frame, and an auxiliary clamping unit disposed in the vertical through groove and cooperating with the flexible lifting unit.

[0029] Furthermore, the auxiliary clamping unit includes a clamping slide symmetrically arranged in the vertical through groove, a top support slide rod that slides in cooperation with the clamping slide, a contact arc plate that contacts the pipe to be welded, and a top support hydraulic rod for driving the top support slide rod to move on the vertical base.

[0030] The flexible lifting unit includes a lifting base frame symmetrically arranged on the lifting rotating frame. A lifting hydraulic rod is provided on the lifting base frame. A flexible lifting frame is provided at the moving end of the lifting hydraulic rod. A flexible roller is provided on the flexible lifting frame. A flexible motor that cooperates with the flexible roller is provided on the flexible lifting frame. A flexible winch is provided in the flexible roller. A flexible lifting cloth is provided between the two flexible winches.

[0031] The mobile reference frame in this invention can move flexibly across the building ground via translation wheels, easily reaching pipe welding points in different locations within specialized buildings such as hospitals. Upon arrival, the stabilizing top support unit in the translation stabilization assembly contacts the ceiling, and the stabilizing bottom support unit contacts the floor, forming a stable support structure that prevents platform movement and provides a stable foundation for welding operations. This structural design ensures that the platform remains stable even in the complex and dynamic hospital environment where stability requirements are extremely high, preventing swaying due to minor external vibrations or personnel movement, thus guaranteeing the accuracy and safety of welding operations.

[0032] The positioning reference platform in this invention can slide and adjust its height on a movable base frame, and can also be securely connected to a stable reference frame via a positioning rod assembly, making the positioning process flexible and precise. In hospitals with complex pipeline layouts, the platform can be quickly and accurately adjusted according to the actual position of the pipelines to meet the welding needs of different pipelines.

[0033] The positioning reference mechanism of this invention, comprising a rotating positioning frame, a positioning telescopic rod, and a positioning lifting assembly, works in concert to achieve precise positioning of the pipeline in both horizontal and vertical directions, allowing for in-plane angle adjustment. The rotating positioning frame, with its gear transmission structure, can rotate the pipeline to any suitable angle, accommodating pipeline welding with varying orientations. The positioning telescopic rod precisely adjusts the position of the positioning base, while the positioning arc block supported by the positioning hydraulic rod ensures the pipeline is at the accurate welding height. In hospital environments, facing pipelines with diverse orientations and heights, this multi-dimensional precision adjustment capability significantly improves welding quality and efficiency.

[0034] The stable lifting mechanism of this invention features a transport vehicle frame connected to the main platform via a secure locking assembly, ensuring stability during transport. The transport base frame and auxiliary lifting assembly smoothly raise the pipeline to the welding height. A second-stage lifting assembly further precisely adjusts the height, while a flexible lifting unit and flexible motor work together to achieve flexible adjustment, preventing damage to the pipeline. In hospitals and other locations with high safety requirements for equipment and personnel, this safe and convenient lifting design not only effectively reduces the labor intensity of construction workers but also prevents pipeline damage due to collisions or falls during transport and lifting, reducing safety hazards. Attached Figure Description

[0035] Figure 1 This is a three-dimensional structural diagram of the overall structure of the present invention;

[0036] Figure 2 This is a schematic diagram of the overall structure of the present invention, excluding the stabilizing lifting mechanism;

[0037] Figure 3 This is a schematic diagram showing the cooperation between the mobile reference frame and the positioning reference platform of the present invention;

[0038] Figure 4 This is a schematic diagram showing the cooperation between the positioning reference platform, the positioning reference mechanism, and the stable support components of the present invention;

[0039] Figure 5 This is an exploded view from a first perspective of the positioning reference platform, positioning reference mechanism, and stable support components of the present invention.

[0040] Figure 6 This is an exploded view from a second perspective of the positioning reference platform, positioning reference mechanism, and stable support components of the present invention.

[0041] Figure 7 This is a schematic diagram showing the cooperation between the stable reference frame and the stable lifting mechanism of the present invention;

[0042] Figure 8 This is a diagram showing the assembly of the stable reference frame, some stable support components, and auxiliary lifting components of the present invention;

[0043] Figure 9 This is a schematic diagram of the positioning guide rail assembly and the stabilizing lifting mechanism of the present invention.

[0044] Figure 10 This is a three-dimensional structural diagram of the stabilizing lifting mechanism of the present invention.

[0045] The attached diagrams are labeled as follows: 100, Moving reference frame; 110, Moving base; 120, Moving base frame; 130, Stabilizing docking frame; 200, Translation stabilizing assembly; 210, Translation wheel; 220, Stabilizing top support unit; 230, Stabilizing back support unit; 300, Positioning reference platform; 310, Reference slide; 320, Lifting bracket; 330, Positioning insert rod assembly; 331, Electric insert rod; 332, Stabilizing insert plate; 333, Stabilizing slot; 340, Horizontal adjustment seat; 350, Fine-tuning platform; 360, Horizontal fine-tuning assembly; 361, Drive groove; 362, Drive screw; 363, Drive block; 364, Guide groove; 365, Guide block; 366, Socket rod; 400, Lifting assembly; 500, Positioning base. 510. Reference through slot; 520. Rotating positioning frame; 521. Rotating circular frame; 522. Rotating ring seat; 523. Rotating base; 524. Rotating fixed seat; 525. First connecting frame; 530. Smooth rotation assembly; 531. Smoothing gear; 532. Drive gear; 533. Drive motor; 534. Rotating gear ring; 535. Smoothing counterweight unit; 536. Counterweight base; 537. Counterweight frame; 538. Counterweight block; 540. Positioning telescopic rod; 550. Positioning base; 560. Positioning lifting assembly; 561. Positioning hydraulic rod; 562. Positioning arc block; 570. Positioning base cylinder; 580. Positioning guide rail assembly; 581. Expanding telescopic rod; 582. Connecting base plate; 583. Abutting rod; 6 00. Stable reference frame; 610. Movable base; 620. Vertical base frame; 630. Stable alignment frame; 700. Stable support assembly; 710. Support carriage; 720. Stable guide rod; 730. Stable base; 740. Adjustment base; 750. Socket; 760. Adjustment groove; 770. Adjustment guide rod; 780. Auxiliary hinge plate; 790. Auxiliary hinge rope; 800. Stable lifting mechanism; 810. Transport trolley frame; 820. Stable locking assembly; 821. Locking frame; 822. Locking expansion rod; 823. Locking circular groove; 830. Transport base frame; 831. Vertical base; 832. First connecting rod; 833. Second connecting rod; 834. Vertical through groove; 840. Reference guide assembly; 841. Reference guide seat 842. U-shaped rod; 843. Limiting groove; 844. Limiting screw; 845. Extrusion hydraulic rod; 846. Vertical plate; 847. Vertical roller; 848. Telescopic control cylinder; 849. Control screw; 850. Auxiliary lifting assembly; 851. Auxiliary hoisting frame; 852. Hydraulic drive rod; 853. Control plate; 854. Controlling horizontal cylinder; 855. Controlling screw; 856. Vertical lifting unit; 860. Two-stage lifting assembly; 861. Rotating base frame; 862. Lifting rotating frame; 863. Rotating unit; 864. Flexible lifting unit; 8641. Lifting base frame; 8642. Lifting hydraulic rod; 8643. Lifting flexible frame; 8644. Flexible roller; 8645. Flexible motor; 8646. Flexible winch;8647. Flexible lifting fabric; 865. Auxiliary clamping unit; 8651. Top support slide bar; 8652. Contact arc plate; 8653. Top support hydraulic rod. Detailed Implementation

[0046] See Figures 1 to 10 As shown, a lifting platform for welding building HVAC pipes includes a movable reference frame 100, a translational stabilizing component 200 on the movable reference frame 100, a positioning reference platform 300 on the movable reference frame 100 that slides with the movable reference frame 100 and is used to facilitate construction personnel in determining the position for high-altitude welding operations, a lifting component 400 on the movable reference frame 100 that cooperates with the positioning reference platform 300, and a positioning reference mechanism 500 on the positioning reference platform 300 that is used to facilitate welding operations on the pipe to be welded.

[0047] On the other side of the movable reference frame 100, a stable reference frame 600 is provided to cooperate with the movable reference frame 100. The stable reference frame 600 is provided with a movable stabilizing component, and the stable reference frame 600 is provided with a stable support component 700 to cooperate with the positioning reference platform 300. The stable reference frame 600 is provided with a stable lifting mechanism 800 to cooperate with the positioning reference mechanism 500 and to move the pipe to be welded to the part of the pipe to be welded.

[0048] Furthermore, the lifting assembly 400 can be configured as a linear drive component such as a lifting screw, hydraulic rod, electric rod, or hinge rope.

[0049] Furthermore, the movable reference frame 100 includes a movable base 110 that cooperates with the translation stabilization component 200, a movable base 120 that cooperates with the positioning reference platform 300 is provided on the movable base 110, and a stable docking frame 130 that cooperates with the stabilization reference frame 600 and the stable connection mechanism is provided on the movable base 110.

[0050] The translational stabilization component 200 includes translational wheels 210 mounted on the movable base 110, a stabilizing top support unit 220 that contacts the building ceiling mounted on the movable base 120, and a stabilizing abutment unit 230 that cooperates with the stabilizing top support unit 220 mounted on the movable base 110.

[0051] The structure of the moving stabilizing component is the same as that of the translational stabilizing component 200.

[0052] The aforementioned stabilizing top support unit 220 is in contact with the building ceiling, and the aforementioned stabilizing counterweight unit is in contact with the building floor. Depending on specific needs, the structure of the stabilizing top support unit 220 and the stabilizing counterweight unit 230 can be set to be the same.

[0053] The aforementioned stabilizing support unit 230 is configured as an abutment rod driven by a hydraulic rod, and the abutment rod is provided with an abutment plate that contacts the floor of the building.

[0054] Specifically, the mobile base 110 serves as the foundation for the entire mobile reference frame 100, the mobile base frame 120 is used to install the positioning reference platform 300, and the stable docking frame 130 works in conjunction with the stable reference frame 600 to connect the two. The three together construct a stable frame structure to support the positioning reference platform 300 and connect with other components, in order to adapt to the complex spatial layout and pipeline distribution in special buildings such as hospitals.

[0055] The translational stabilization component 200 solves the problem of flexible movement and stable fixation of the platform within a building, especially in special building environments such as hospitals, where it is necessary to avoid the impact of platform swaying or instability on welding operations and surrounding facilities. The translational wheels 210 enable planar movement of the platform, while the stabilizing top support unit 220 and the stabilizing bottom support unit 230 contact the building structure from the top and bottom directions respectively, providing stable support.

[0056] Furthermore, the positioning reference platform 300 includes a reference slide 310 that slides with the movable base frame 120, and the reference slide 310 is provided with a lifting bracket 320 that cooperates with the lifting assembly 400. The reference slide 310 is provided with a positioning insert rod assembly 330 that cooperates with the movable base frame 120. A horizontal adjustment seat 340 is provided at one end of the reference slide 310 facing the stable docking frame 130.

[0057] The horizontal adjustment base 340 is provided with a fine-tuning platform 350 that slides and engages with the horizontal adjustment base 340. The horizontal adjustment base 340 is provided with a horizontal fine-tuning component 360 that engages with the fine-tuning platform 350. The positioning reference mechanism 500 is provided on the fine-tuning platform 350. The fine-tuning platform 350 is provided with a receiving rod 366 that engages with the stable support component 700.

[0058] Furthermore, the positioning rod assembly 330 includes an electric rod 331 symmetrically arranged on the reference slide 310, and a stabilizing plate 332 that cooperates with the electric rod 331 is provided on the movable base frame 120. The stabilizing plate 332 has a plurality of stabilizing slots 333 that cooperate with the electric rod 331 vertically.

[0059] The horizontal fine-tuning component 360 includes a drive groove 361 horizontally formed on the horizontal adjustment base 340, a drive screw 362 disposed in the drive groove 361, a drive block 363 disposed on the fine-tuning platform 350 that slides in cooperation with the drive groove 361 and cooperates with the drive screw 362, a guide groove 364 disposed on the horizontal adjustment base 340 that cooperates with the fine-tuning platform 350, and a guide block 365 disposed on the fine-tuning platform 350 that cooperates with the guide groove 364.

[0060] Specifically, the reference slide 310 slides and adjusts its position on the movable base frame 120, the lifting bracket 320 cooperates with the lifting assembly 400 to achieve height adjustment, and the positioning rod assembly 330 and the stable reference frame 600 are fitted together to achieve a stable connection, thereby achieving precise adjustment of the platform's position and ensuring a stable connection with the stable reference frame 600. This provides a stable foundation for pipeline positioning and improves welding quality and efficiency. Furthermore, the horizontal adjustment seat 340 provides an installation base for the fine-tuning platform 350. The drive screw 362 drives the drive block 363 in the drive groove 361, causing the fine-tuning platform 350 to slide along the guide groove 364, achieving fine-tuning in the horizontal direction. This improves the positioning accuracy of the pipeline's horizontal position, meets the strict requirements of welding for pipeline position, and reduces welding defects caused by pipeline position deviations.

[0061] The present invention also features that the positioning reference mechanism 500 includes a reference through slot 510 formed on the fine-tuning platform 350, a rotating positioning frame 520 colinear with the axis of the reference through slot 510 on the fine-tuning platform 350, a rotating base 523 rotatably engaged with the rotating positioning frame 520 on the rotating positioning frame 520, and a smooth rotation component 530 that enables the rotating base 523 to rotate smoothly on the rotating positioning frame 520.

[0062] The rotating base 523 is provided with a set of positioning telescopic rods 540 whose telescopic direction is consistent with the radial direction of the rotating positioning frame 520. The telescopic ends of the set of positioning telescopic rods 540 are connected to the same positioning base 550. The positioning base 550 is provided with a positioning support assembly 560 that contacts the pipe. The bottom end of the positioning base 550 is provided with a positioning base cylinder 570. The positioning base cylinder 570 is provided with a positioning guide rail assembly 580 that cooperates with the positioning base cylinder 570.

[0063] Furthermore, the positioning and lifting assembly 560 includes a positioning hydraulic rod 561 disposed on the positioning base 550, and the moving end of the positioning hydraulic rod 561 is provided with a positioning arc block 562 that cooperates with the pipeline.

[0064] The positioning guide rail assembly 580 includes an expansion telescopic rod 581. An expansion plate is provided at the top of the expansion telescopic rod 581. An abutment rod 583 that cooperates with the positioning base cylinder 570 is provided on the expansion plate. A connecting base plate 582 that connects to the moving reference frame 100 is provided at the bottom of the expansion telescopic rod 581. A connecting screw that connects to the moving reference frame 100 is provided on the connecting base plate 582.

[0065] Specifically, the connecting base plate 582 is connected to the stable docking frame 130 in the movable reference frame 100.

[0066] Furthermore, the rotating positioning frame 520 includes a rotating circular frame 521 disposed on the fine-tuning platform 350, and the rotating circular frame 521 is provided with a rotating ring seat 522 that cooperates with the smooth rotation component 530;

[0067] The smooth rotation assembly 530 includes a plurality of smoothing gears 531 disposed on the rotating ring seat 522 and evenly arranged along the circumferential direction of the rotating ring seat 522, and a drive gear 532 that cooperates with the smoothing gears 531 is disposed on the rotating ring seat 522, and a drive motor 533 that cooperates with the drive gear 532 is disposed on the rotating ring seat 522.

[0068] The rotating ring seat 522 is provided with a rotating toothed ring 534 that meshes with the stabilizing gear 531 and the driving gear 532 and is fixedly connected to the rotating base 523. The rotating toothed ring 534 is provided with a stabilizing counterweight unit 535 connected to the rotating base 523.

[0069] The rotating base 523 includes a rotating fixed base 524 connected to the positioning telescopic rod 540. A first connecting frame 525 is provided at the top of the rotating fixed base 524, and the first connecting frame 525 is connected to the rotating toothed ring 534.

[0070] Furthermore, in the positioning reference mechanism 500, the rotating positioning frame 520 drives the rotating base 523 to rotate via a gear transmission structure, thereby adjusting the angle of the positioning base 550. This allows the pipe to rotate to a suitable welding angle within the plane, improving welding convenience and quality, and ensuring smooth welding operations. The positioning lifting assembly 560 lifts the pipe to the required welding height, reducing the labor intensity of construction personnel and ensuring the stability of the lifting process, thus ensuring the safety of the welding operation. The positioning guide rail assembly 580 guides the pipe accurately to the welding position, ensuring the accuracy of the pipe's position and preventing damage to surrounding facilities during movement.

[0071] Preferably, the stabilizing counterweight unit 535 includes a plurality of counterweight bases 536 arranged circumferentially along the rotating toothed ring 534, and the structure of the counterweight base 536 is consistent with the structure of the rotating base 523, and a counterweight frame 537 is provided at the bottom end of the mating base, and a counterweight block 538 is provided on the counterweight frame 537.

[0072] Two preferred mating relationships between the rotating ring seat 522 and the rotating base 523 are provided, as follows:

[0073] Firstly, the rotating ring seat 522 is provided with a through circular groove that slides with the first connecting frame 525; in use, the first connecting frame 525 passes through the through circular groove.

[0074] Secondly, the rotating ring seat 522 has a stable circular groove, and the top surface of the rotating fixed seat 524 is provided with a second connecting frame. The first connecting frame 525 and the second connecting frame are symmetrically arranged. The second connecting frame is provided with a sliding plate, and the sliding plate is provided with a stable slider that slides in cooperation with the stable circular groove. The cross-section of the rotating positioning frame 520 is inverted T-shaped.

[0075] Furthermore, the stable reference frame 600 includes a movable base 610 that cooperates with the movable stabilizing component, a vertical base 620 that cooperates with the stable support component 700 on the movable base 610, and a stable alignment frame 630 that cooperates with the movable reference frame 100 and the stable connection mechanism on the movable base 610.

[0076] The stable support assembly 700 includes a support slide 710 that slidably engages with the vertical base frame 620, and a stable guide rod 720 that slidably engages with the support slide 710 is provided on the vertical base frame 620. A stable base 730 that engages with the positioning reference platform 300 is provided on the support slide 710. An adjustment base 740 that slidably engages with the stable base is provided on the stable base 730. A socket cylinder 750 that engages with the positioning reference platform 300 is provided on the adjustment base 740. An adjustment groove 760 that slidably engages with the adjustment base 740 is provided on the stable base 730. An adjustment guide rod 770 that engages with the adjustment base 740 is provided in the adjustment groove 760.

[0077] Specifically, the socket 750 in the stable support component 700 is engaged with the socket rod 366 in the positioning reference platform 300.

[0078] Furthermore, several socket cylinders 750 are provided, and correspondingly, several socket rods 366 are provided.

[0079] Preferably, the stabilizing reference frame 600 is provided with an auxiliary hinge 780 that cooperates with the lifting assembly 400, and the auxiliary winch is provided with an auxiliary hinge rope 790 that cooperates with the auxiliary winch.

[0080] Specifically, the stabilizing alignment frame 630 is connected to the stabilizing docking frame 130, and the stabilizing docking frame 130 is provided with a connecting groove for connecting to the stabilizing alignment frame 630, and a stabilizing insert is provided between the stabilizing alignment frame 630 and the stabilizing docking frame 130.

[0081] Preferably, the movable base frame 120 is provided with a triangular stabilizer that slides with the movable base frame 120, is connected to the horizontal base frame, and is used to provide stability to the horizontal base frame. The triangular stabilizer is provided with a limiting rod assembly that cooperates with the reference slide 310. The triangular stabilizer is provided with a stabilizing hinge rope that is connected to the movable base frame 120. The structure of the limiting rod assembly is the same as the structure of the positioning rod assembly 330.

[0082] Specifically, the movable stabilizing component provides support through contact with the building structure. The stabilizing alignment frame 630 connects to the stabilizing docking frame 130 of the movable reference frame 100 via a stabilizing insert rod, enhancing the stability of the entire platform and preventing platform swaying or displacement during welding, thus ensuring smooth welding operations. The stabilizing support component 700 further enhances the connection stability between the platform and the pipeline, while also assisting the positioning reference platform 300 in positioning the pipeline, meeting the welding quality and safety requirements of special buildings such as hospitals.

[0083] The present invention also features that the stabilizing lifting mechanism 800 includes a transport frame 810 for transporting the pipe to be welded, the transport frame 810 has a receiving groove for accommodating the positioning guide rail assembly 580, and the transport frame 810 is provided with a stabilizing locking assembly 820 connected to the moving reference frame 100 and the stabilizing reference frame 600.

[0084] The transport vehicle frame 810 is provided with a transport base frame 830, the positioning guide rail assembly 580 is provided with a reference guide assembly 840 that cooperates with the transport base frame 830, the stable reference frame 600 is provided with an auxiliary lifting assembly 850 that provides driving force for the vertical movement of the transport base frame 830 along the stable reference frame 600, and the transport base frame 830 is provided with a two-stage lifting assembly 860 for lifting the pipe to be welded to the welding position.

[0085] Furthermore, the stabilizing locking assembly 820 includes locking frames 821 symmetrically arranged at both ends of the transport vehicle frame 810. The locking frames 821 are provided with locking expansion rods 822 that cooperate with the movable reference frame 100 or the stabilizing reference frame 600. The movable reference frame 100 and the stabilizing reference frame 600 are provided with locking grooves 823 that cooperate with the locking expansion rods 822.

[0086] The vertical base frame 620 includes a vertical base 831. At both ends of the vertical base 831, there are a first connecting rod 832 that cooperates with the reference guide assembly 840 and a second connecting rod 833 that cooperates with the auxiliary lifting assembly 850. A vertical through groove 834 is provided on the vertical base 831.

[0087] Furthermore, the reference guide assembly 840 includes a reference guide seat 841, on which a plurality of U-shaped rods 842 are vertically arranged, and a limiting groove 843 that cooperates with the U-shaped rods 842 is provided on the reference guide seat 841, and a limiting screw 844 that cooperates with the limiting groove 843 is provided on the reference guide seat 841.

[0088] The reference guide seat 841 is provided with a pressing hydraulic rod 845 that cooperates with the U-shaped rod 842. The moving end of the pressing hydraulic rod 845 is provided with a vertical plate 846. The vertical plate 846 is provided with a vertical roller 847 that cooperates with the U-shaped rod 842 and facilitates the vertical movement of the reference guide seat 841. The reference guide seat 841 is provided with a telescopic control cylinder 848 that cooperates with the first connecting rod 832 and facilitates the adjustment of the welding position of the pipeline. The telescopic control cylinder 848 is provided with a control screw 849 that cooperates with the first connecting rod 832.

[0089] The auxiliary lifting assembly 850 includes an auxiliary hoisting frame 851 that slides with the stable reference frame 600. A set of hydraulic drive rods 852 are horizontally arranged on the auxiliary hoisting frame 851. All of the hydraulic drive rods 852 are connected to the same control plate 853. The control plate 853 is provided with a control cross cylinder 854 that cooperates with the second connecting rod 833. The control cross cylinder 854 is provided with a control screw 855 that cooperates with the second connecting rod 833. The stable reference frame 600 is provided with a vertical lifting unit 856 for driving the auxiliary hoisting frame 851 to move vertically.

[0090] Preferably, the vertical lifting unit 856 can be configured as a winch rope structure, or the vertical lifting unit 856 can be configured as a linear drive structure such as a vertical lead screw.

[0091] Furthermore, the two-stage lifting assembly 860 includes a rotating base frame 861 disposed on the top surface of the vertical base 831. A lifting frame 862 is disposed on the rotating base frame 861 and rotates in cooperation with the rotating base frame 861. A rotating unit 863 is disposed on the rotating base frame 861 to drive the lifting frame 862 to rotate. A flexible lifting unit 864 is disposed on the lifting frame 862. An auxiliary clamping unit 865 that cooperates with the flexible lifting unit 864 is disposed in the vertical through groove 834.

[0092] The auxiliary clamping unit 865 includes a clamping slide symmetrically arranged in the vertical through groove 834. The clamping slide is provided with a top support slide rod 8651 that slides with the clamping slide. The top support slide rod 8651 is provided with an abutting arc plate 8652 that contacts the pipe to be welded. The vertical base 831 is provided with a top support hydraulic rod 8653 for driving the top support slide rod 8651 to move.

[0093] The flexible lifting unit 864 includes a lifting base frame 8641 symmetrically arranged on the lifting frame 862. A lifting hydraulic rod 8642 is provided on the lifting base frame 8641. A flexible lifting frame 8643 is provided at the moving end of the lifting hydraulic rod 8642. A flexible roller 8644 is provided on the flexible lifting frame 8643. A flexible motor 8645 that cooperates with the flexible roller 8644 is provided on the flexible lifting frame 8643. A flexible winch 8646 is provided in the flexible roller 8644. A flexible lifting cloth 8647 is provided between the two flexible winches 8646.

[0094] Specifically, the transport frame 810 is used to carry the pipeline, and the stabilizing locking assembly 820 is connected to the moving reference frame 100 and the stabilizing reference frame 600 through the locking expansion rod 822 cooperating with the locking groove 823. The vertical base frame 620 moves vertically under the drive of the auxiliary lifting assembly 850. The reference guide seat 841 in the reference guide assembly 840 guides the vertical movement through structures such as the U-shaped rod 842, the limiting groove 843, and the limiting screw 844. The telescopic control cylinder 848 adjusts the relative position of the first connecting rod 832 and the second connecting rod 833. The two-stage lifting assembly 860 is used to precisely adjust the height of the pipeline to adapt to complex welding position requirements, especially in special buildings such as hospitals where the pipeline layout is complex and the welding positions are variable. The lifting frame 862 drives the flexible lifting unit 864 to rotate under the drive of the rotating unit 863. The flexible roller shaft 8644 rotates under the drive of the flexible motor 8645. The top support slide bar 8651 adjusts the vertical height of the pipeline under the drive of the top support hydraulic rod 8653.

[0095] Movement of the mobile reference frame 100: The mobile reference frame 100 is moved across the building ground via translation wheels 210, facilitating the transport of the entire platform to the location where pipe welding is required. Once it reaches a suitable position, the translation stabilization assembly 200 comes into play. The stabilizing top support unit 220 contacts the building ceiling, and the stabilizing bottom support unit 230 contacts the building floor. This vertical support method secures the mobile reference frame 100 within the building space, preventing platform movement during subsequent operations and providing a stable foundation for welding work.

[0096] Positioning adjustment of the positioning reference platform 300: The positioning reference platform 300 can slide on the movable base 120. Through the cooperation of the horizontal adjustment seat 340 and the fine-tuning platform 350, the horizontal fine-tuning component 360 is used to precisely adjust the horizontal position of the fine-tuning platform 350. At the same time, the positioning reference platform 300 can be height adjusted by the lifting component 400 to adapt to the pipe welding requirements at different heights.

[0097] Positioning operation of positioning reference mechanism 500: Positioning reference mechanism 500 is located on positioning reference platform 300. Its rotating positioning frame 520 can rotate around the transmission structure composed of smoothing gear 531 and driving gear 532, facilitating adjustment of the angle of positioning base 550 to accommodate pipelines with different orientations. Positioning telescopic rod 540 can further adjust the position of positioning base 550, thereby accurately determining the position of the pipeline to be welded. Positioning hydraulic rod 561 in positioning lifting assembly 560 drives positioning arc block 562 to lift the pipeline, placing it at a suitable welding height. Positioning guide rail assembly 580, through the cooperation of expanding telescopic rod 581, expanding plate, and abutting insert rod 583 with positioning base cylinder 570, guides the pipeline accurately to the welding position.

[0098] The stabilizing lifting mechanism 800 provides auxiliary positioning and lifting: The transport carriage 810 in the stabilizing lifting mechanism 800 is connected to the moving reference frame 100 and the stabilizing reference frame 600 via the stabilizing locking assembly 820, ensuring the stability of the transport carriage 810. The vertical base frame 620 moves vertically under the drive of the auxiliary lifting assembly 850, lifting the pipe to a certain height. The two-stage lifting assembly 860 further precisely adjusts the pipe height. The lifting frame 862, driven by the rotating unit 863, drives the flexible lifting unit 864 to rotate. The flexible roller 8644 rotates under the drive of the flexible motor 8645, accurately lifting the pipe to the welding position.

[0099] The function of the stabilizing reference frame 600: The stabilizing reference frame 600 is correspondingly set up with the movable reference frame 100. Through the insertion and insertion cooperation between the stabilizing support component 700 and the positioning reference platform 300, the stability of the entire platform is further enhanced. The stabilizing reference frame 600 is also fixed to the building by its own movable stabilizing component, and the stabilizing alignment frame 630 is connected to the stabilizing docking frame 130 of the movable reference frame 100 and equipped with a stabilizing insert rod to ensure a stable connection between the two. The movable reference frame 100, the stabilizing reference frame 600, and the positioning reference platform 300 cooperate to form a stable support system. Simultaneously, the positioning reference mechanism 500 and the stabilizing lifting mechanism 800 work together to ensure the accurate horizontal and vertical positioning of the pipeline and to stably lift it to the welding height.

[0100] The technical features of this invention not described can be implemented by or using existing technology, and will not be repeated here. Of course, the above description is not a limitation of this invention, and this invention is not limited to the examples above. Any changes, modifications, additions or substitutions made by those skilled in the art within the scope of this invention should also be within the protection scope of this invention.

Claims

1. A lifting platform for welding building HVAC pipes, characterized in that: The system includes a movable reference frame (100), on which a translational stabilizing component (200) is provided. The movable reference frame (100) is also equipped with a positioning reference platform (300) that slides with the movable reference frame (100) and is used to facilitate construction personnel in determining the position for high-altitude welding operations. The movable reference frame (100) is equipped with a lifting component (400) that cooperates with the positioning reference platform (300). The positioning reference platform (300) is equipped with a positioning reference mechanism (500) that facilitates welding operations on the pipe to be welded. A stable reference frame (600) is provided on one side of the movable reference frame (100) to cooperate with the movable reference frame (100). A movable stabilizing component is provided on the stable reference frame (600), and a stable support component (700) is provided on the stable reference frame (600) to cooperate with the positioning reference platform (300). A stable lifting mechanism (800) is provided on the stable reference frame (600) to cooperate with the positioning reference mechanism (500) and to move the pipe to be welded to the part of the pipe to be welded. The movable reference frame (100) includes a movable base (110) that cooperates with the translation stabilization component (200). The movable base (110) is provided with a movable base frame (120) that cooperates with the positioning reference platform (300). The movable base (110) is provided with a stabilizing docking frame (130) that cooperates with the stabilizing reference frame (600) and the stabilizing lifting mechanism. The translational stabilization component (200) includes translational wheels (210) mounted on the movable base (110), a stabilizing top support unit (230) that contacts the building ceiling mounted on the movable base (120), and a stabilizing abutment unit (220) that cooperates with the stabilizing top support unit (230) mounted on the movable base (110). The structure of the movable stabilizing component is the same as that of the translational stabilizing component (200); The positioning reference platform (300) includes a reference slide (310) that slides with the movable base frame (120), and the reference slide (310) is provided with a lifting bracket (320) that cooperates with the lifting assembly (400). The reference slide (310) is provided with a positioning insert rod assembly (330) that cooperates with the movable base frame (120). A horizontal adjustment seat (340) is provided at one end of the reference slide (310) facing the stable docking frame (130). The horizontal adjustment seat (340) is provided with a fine adjustment platform (350) that slides and engages with the horizontal adjustment seat (340). The horizontal adjustment seat (340) is provided with a horizontal fine adjustment component (360) that engages with the fine adjustment platform (350). The positioning reference mechanism (500) is provided on the fine adjustment platform (350). The fine adjustment platform (350) is provided with a socket rod (366) that engages with the stable support component (700).

2. The lifting platform for welding building HVAC pipes as described in claim 1, characterized in that: The positioning reference mechanism (500) includes a reference through slot (510) formed on the fine-tuning platform (350), a rotating positioning frame (520) collinear with the axis of the reference through slot (510) on the fine-tuning platform (350), a rotating base (523) rotatably engaged with the rotating positioning frame (520) on the rotating positioning frame (520), and a smooth rotation component (530) on the rotating positioning frame (520) to enable the rotating base (523) to rotate smoothly on the rotating positioning frame (520). The rotating base (523) is provided with a set of positioning telescopic rods (540) whose telescopic direction is consistent with the radial direction of the rotating positioning frame (520). The telescopic ends of the set of positioning telescopic rods (540) are connected to the same positioning base (550). The positioning base (550) is provided with a positioning support assembly (560) that contacts the pipe. The bottom end of the positioning base (550) is provided with a positioning base cylinder (570). The positioning base cylinder (570) is provided with a positioning guide rail assembly (580) that cooperates with the positioning base cylinder (570).

3. The lifting platform for welding building HVAC pipes as described in claim 2, characterized in that: The rotating positioning frame (520) includes a rotating circular frame (521) disposed on the fine-tuning platform (350), and the rotating circular frame (521) is provided with a rotating ring seat (522) that cooperates with the smooth rotation assembly (530). The smooth rotation assembly (530) includes a plurality of smooth gears (531) disposed on the rotating ring seat (522) and evenly arranged along the circumferential direction of the rotating ring seat (522), and a drive gear (532) cooperating with the smooth gears (531) is disposed on the rotating ring seat (522), and a drive motor (533) cooperating with the drive gear (532) is disposed on the rotating ring seat (522). The rotating ring seat (522) is provided with a rotating toothed ring (534) that meshes with the stabilizing gear (531) and the driving gear (532) and is fixedly connected to the rotating base (523). The rotating toothed ring (534) is provided with a stabilizing counterweight unit (535) connected to the rotating base (523). The rotating base (523) includes a rotating fixed seat (524) connected to the positioning telescopic rod (540), and a first connecting frame (525) is provided at the top of the rotating fixed seat (524), and the first connecting frame (525) is connected to the rotating toothed ring (534).

4. The lifting platform for welding building HVAC pipes as described in claim 3, characterized in that: The stable reference frame (600) includes a movable base (610) that cooperates with the movable stabilizing component. The movable base (610) is provided with a vertical base frame (620) that cooperates with the stable support component (700). The movable base (610) is provided with a stable alignment frame (630) that cooperates with the movable reference frame (100) and the stable lifting mechanism. The stable support assembly (700) includes a support slide (710) that slides with the vertical base frame (620), and a stable guide rod (720) that slides with the support slide (710) is provided on the vertical base frame (620). A stable base (730) that cooperates with the positioning reference platform (300) is provided on the support slide (710). An adjustment base (740) that slides with the stable base is provided on the stable base (730). A socket cylinder (750) that inserts with the positioning reference platform (300) is provided on the adjustment base (740). An adjustment groove (760) that slides with the adjustment base (740) is provided on the stable base (730). An adjustment guide rod (770) that cooperates with the adjustment base (740) is provided in the adjustment groove (760).

5. The lifting platform for welding building HVAC pipes as described in claim 4, characterized in that: The stabilizing lifting mechanism (800) includes a transport vehicle (810) for transporting the pipe to be welded. The transport vehicle (810) has a receiving groove for accommodating the positioning guide rail assembly (580). The transport vehicle (810) is provided with a stabilizing locking assembly (820) connected to the moving reference frame (100) and the stabilizing reference frame (600). The transport vehicle frame (810) is provided with a transport base frame (830), the positioning guide rail assembly (580) is provided with a reference guide assembly (840) that cooperates with the transport base frame (830), the stable reference frame (600) is provided with an auxiliary lifting assembly (850) that provides driving force for the transport base frame (830) to move vertically along the stable reference frame (600), and the vertical base frame (620) is provided with a two-stage lifting assembly (860) for lifting the pipe to be welded to the position to be welded.

6. The lifting platform for welding building HVAC pipes as described in claim 5, characterized in that: The stabilizing locking assembly (820) includes locking frames (821) symmetrically arranged at both ends of the transport vehicle frame (810). The locking frames (821) are provided with locking expansion rods (822) that cooperate with the movable reference frame (100) or the stabilizing reference frame (600). The movable reference frame (100) and the stabilizing reference frame (600) are provided with locking grooves (823) that cooperate with the locking expansion rods (822). The transport base frame (830) includes a vertical base (831), and a first connecting rod (832) that cooperates with the reference guide assembly (840) and a second connecting rod (833) that cooperates with the auxiliary lifting assembly (850) are respectively provided at both ends of the vertical base (831). A vertical through groove (834) is provided on the vertical base (831). The reference guide assembly (840) includes a reference guide seat (841), on which a plurality of U-shaped rods (842) are vertically arranged. The reference guide seat (841) has a limiting groove (843) that mates with the U-shaped rods (842), and a limiting screw (844) that mates with the limiting groove (843). The reference guide seat (841) also has a compression hydraulic rod (845) that mates with the U-shaped rods (842). The moving end of the hydraulic rod (845) is provided with a vertical plate (846), and the vertical plate (846) is provided with a vertical roller (847) that cooperates with the U-shaped rod (842) and facilitates the vertical movement of the reference guide seat (841); the reference guide seat (841) is provided with a telescopic control cylinder (848) that cooperates with the first connecting rod (832) and facilitates the adjustment of the welding position of the pipeline, and the telescopic control cylinder (848) is provided with a control screw (849) that cooperates with the first connecting rod (832); The auxiliary lifting assembly (850) includes an auxiliary hoisting frame (851) that slides with the stable reference frame (600). A set of hydraulic drive rods (852) are horizontally arranged on the auxiliary hoisting frame (851). All of the hydraulic drive rods (852) are connected to the same control plate (853). The control plate (853) is provided with a control cylinder (854) that cooperates with the second connecting rod (833). The control cylinder (854) is provided with a control screw (855) that cooperates with the second connecting rod (833). The stable reference frame (600) is provided with a vertical lifting unit (856) for driving the auxiliary hoisting frame (851) to move vertically.

7. A lifting platform for welding building HVAC pipes as described in claim 6, characterized in that: The two-stage lifting assembly (860) includes a rotating base frame (861) disposed on the top surface of the vertical base (831), a lifting frame (862) disposed on the rotating base frame (861) and rotating unit (863) disposed on the rotating base frame (861) for driving the lifting frame (862) to rotate, a flexible lifting unit (864) disposed on the lifting frame (862), and an auxiliary clamping unit (865) disposed in the vertical through groove (834) for cooperating with the flexible lifting unit (864).

8. The lifting platform for welding building HVAC pipes as described in claim 7, characterized in that: The auxiliary clamping unit (865) includes a clamping slide symmetrically arranged in the vertical through groove (834). The clamping slide is provided with a top support slide rod (8651) that slides with the clamping slide. The top support slide rod (8651) is provided with an abutting arc plate (8652) that contacts the pipe to be welded. The vertical base (831) is provided with a top support hydraulic rod (8653) for driving the top support slide rod (8651) to move. The flexible lifting unit (864) includes a lifting base frame (8641) symmetrically arranged on the lifting rotating frame (862). A lifting hydraulic rod (8642) is provided on the lifting base frame (8641). A lifting flexible frame (8643) is provided at the moving end of the lifting hydraulic rod (8642). A flexible roller (8644) is provided on the lifting flexible frame (8643). A flexible motor (8645) that cooperates with the flexible roller (8644) is provided on the lifting flexible frame (8643). A flexible winch (8646) is provided in the flexible roller (8644). A flexible lifting cloth (8647) is provided between the two flexible winches (8646).

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