Lifting platform for building heating and ventilation pipeline welding

Abstract

The invention relates to the technical field of building decoration engineering construction, in particular to a lifting platform for building heating and ventilation pipeline welding, which comprises a movable reference frame, a translation stabilizing assembly arranged on the movable reference frame, a positioning reference platform arranged on the movable reference frame and a lifting assembly arranged on the movable reference frame. A positioning reference mechanism is arranged on the positioning reference platform; a stable reference frame is arranged on the other side of the movable reference frame, a movable stable assembly is arranged on the stable reference frame, a stable supporting assembly is arranged on the stable reference frame, and a stable lifting mechanism is arranged on the stable reference frame. Through a series of innovative structural designs, the high-altitude welding device is elaborately designed on the basis of the heating and ventilation pipeline requirements of special buildings such as hospitals, the safety, efficiency and quality of high-altitude welding are remarkably improved, and the high-altitude welding device can perfectly adapt to the complicated and changeable working environment in the hospital buildings; and an ideal solution is provided for heating and ventilation pipeline laying and welding engineering of special buildings such as hospitals.

Description

Technical Field

[0001] The invention relates to the technical field of building decoration engineering construction, in particular to a lifting platform for welding building HVAC pipelines. Background Art

[0002] In the field of modern architecture, especially in special buildings such as hospitals, the design and construction of HVAC systems are crucial. As a key place for providing medical services, the internal environment of the hospital must maintain a high degree of cleanliness, suitable temperature and humidity to ensure the treatment effect of patients and the comfort of medical staff. As the core component of the internal environment control of hospital buildings, the laying and welding of HVAC pipes is not only related to the operating efficiency of the system, but also directly related to the quality of medical services and the recovery process of patients.

[0003] The HVAC piping system of hospital buildings is complex and large, covering multiple subsystems such as heating, ventilation, and air conditioning. These pipes often need to be laid over long distances and at multiple levels inside the building, especially in hard-to-reach areas such as ceilings, walls, and underground spaces. Traditional pipe welding operations, such as using scaffolding or simple lifting equipment, are not only inefficient, but also pose safety hazards, and are difficult to meet the high standards and strict requirements for HVAC pipe laying in hospital buildings. Moreover, hospitals have extremely high safety requirements, and sparks must not be generated during the welding of HVAC pipes to avoid safety accidents such as fires or explosions. And during the construction process, it is necessary to minimize the impact of noise and dust on other areas.

[0004] In addition, with the continuous development of modern construction technology, the requirements for building HVAC pipe welding are also increasing. Traditional welding construction methods have exposed many shortcomings when facing special buildings such as hospitals. For example, when manually operating welding, it is difficult to ensure that the welding points can be accurately located every time under complex building structures, and the welding quality is unstable. Especially in high-altitude operations, workers need to weld in narrow and unstable spaces for a long time, which not only tests the workers' professional skills, but also poses a serious threat to their lives.

[0005] How to solve the above technical problems is the subject faced by the present invention. Summary of the invention

[0006] In order to solve the shortcomings of the prior art, the present invention provides a rationally designed, safe and reliable lifting platform for building HVAC pipe welding, which is particularly suitable for positioning and lifting devices for high-altitude welding operations in special buildings such as hospitals. The device achieves accurate positioning and stable lifting of the pipe to be welded through the cooperation of a mobile 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 the technical problem is: a lifting platform for welding building HVAC pipes, comprising a mobile reference frame, the mobile reference frame is provided with a translation stabilizing component, the mobile reference frame is provided with a positioning reference platform that is slidably matched with the mobile reference frame and is used to facilitate construction personnel to determine the position for high-altitude welding operations, the mobile reference frame is provided with a lifting component that cooperates with the positioning reference platform, and the positioning reference platform is provided with a positioning reference mechanism that is used to facilitate welding operations on pipes to be welded;

[0008] A stable reference frame cooperating with the mobile reference frame is arranged at the other side of the mobile reference frame, a mobile stable component is arranged on the stable reference frame, and a stable support component cooperating with the positioning reference platform is arranged on the stable reference frame, and a stable lifting mechanism cooperating with the positioning reference mechanism and used to move the pipe to be welded to the pipe to be welded position is arranged on the stable reference frame.

[0009] Further, the mobile reference frame includes a mobile base that cooperates with the translation stabilization component, the mobile base is provided with a mobile base that cooperates with the positioning reference platform, and the mobile base is provided with a stable docking frame that cooperates with the stable reference frame and the stable connection mechanism;

[0010] The translation stabilization assembly includes translation wheels arranged on the mobile base, the mobile base is provided with a stabilizing top support unit in contact with the building ceiling, and the mobile base is provided with a stabilizing support unit cooperating with the stabilizing top support unit;

[0011] The structure of the mobile stabilizing assembly is consistent with the structure of the translation stabilizing assembly.

[0012] Further, the positioning reference platform includes a reference slide that is slidably matched with the mobile base, and the reference slide is provided with a lifting bracket that is matched with the lifting assembly, the reference slide is provided with a positioning plug rod assembly that is matched with the mobile base, and a horizontal adjustment seat is provided at one end of the reference slide facing the stable docking frame;

[0013] The horizontal adjustment seat is provided with a fine-tuning platform that slidably cooperates with the horizontal adjustment seat, the horizontal adjustment seat 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 socket rod that sockets and cooperates with the stable support component.

[0014] The specific features of the present invention are that the positioning reference mechanism includes a reference through-groove provided on the fine-tuning platform, a rotating positioning frame colinear with the axis of the reference through-groove is provided on the fine-tuning platform, a rotating base rotatingly matched with the rotating positioning frame is provided on the rotating positioning frame, and a smooth rotating component is provided on the rotating positioning frame to enable the rotating base to perform smooth rotational motion on the rotating positioning frame;

[0015] The rotating base is provided with a group of positioning telescopic rods whose telescopic direction is consistent with the radial direction of the rotating positioning frame, and the telescopic ends of a group of positioning telescopic rods are commonly connected to the same positioning base. The positioning base is provided with a positioning lifting assembly in contact with the pipeline, and a positioning base cylinder is provided at the bottom end of the positioning base, and a positioning guide rail assembly cooperating with the positioning base cylinder is provided in the positioning base cylinder.

[0016] Further, the rotating positioning frame includes a rotating circular frame arranged on the fine-tuning platform, and the rotating circular frame is provided with a rotating ring seat cooperating with the stable rotation component;

[0017] The stable rotation assembly includes a plurality of stable gears arranged on the rotating ring seat and evenly arranged along the circumferential direction of the rotating ring seat, and a driving gear matched with the stable gear is arranged on the rotating ring seat, and a driving motor matched with the driving gear is arranged on the rotating ring seat;

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

[0019] The rotating base comprises a rotating fixed seat connected to the positioning telescopic rod, a first connecting frame is arranged at the top end of the rotating fixed seat, and the first connecting frame is connected to the rotating gear ring.

[0020] Further, the stable reference frame includes a movable base that cooperates with the mobile stable assembly, the movable base is provided with a vertical base that cooperates with the stable support assembly, and the movable base is provided with a stable alignment frame that cooperates with the mobile reference frame and the stable connection mechanism;

[0021] The stable support assembly includes a supporting slide that slides with the vertical base frame, and the vertical base frame is provided with a stable guide rod that slides with the supporting slide, the supporting slide is provided with a stable base that cooperates with the positioning reference platform, the stable base is provided with an adjusting base that slides with the stable base, the adjusting base is provided with a socket sleeve that sockets with the positioning reference platform, the stable base is provided with an adjusting groove that slides with the adjusting base, and the adjusting groove is provided with an adjusting guide rod that cooperates with the adjusting base.

[0022] The specific characteristics of the present invention are that the stable lifting mechanism comprises a transport frame for transporting the pipe to be welded, the transport frame is provided with a receiving groove for accommodating the positioning guide rail assembly, and the transport frame is provided with a stable locking assembly connected to the mobile reference frame and the stable reference frame;

[0023] The transport frame is provided with a transport base, the positioning rail assembly is provided with a reference guide assembly cooperating with the transport base, the stable reference frame is provided with an auxiliary lifting assembly providing driving force for the transport base to move vertically along the stable reference frame, and the transport base is provided with a two-stage lifting assembly for lifting the pipe to be welded to the welding position.

[0024] The stable locking assembly comprises a locking frame symmetrically arranged at both ends of the transport frame, the locking frame is provided with a locking expansion rod matched with the mobile reference frame or the stable reference frame, and the mobile reference frame and the stable reference frame are provided with a locking circular groove matched with the locking expansion rod;

[0025] The transport base frame includes a vertical base, and a first connecting rod cooperating with the reference guide assembly and a second connecting rod cooperating with the auxiliary lifting assembly are respectively arranged at both ends of the vertical base, and a vertical through groove is opened on the vertical base;

[0026] The reference guide assembly comprises a reference guide seat, on which a plurality of U-shaped rods are vertically arranged, a limiting groove cooperating with the U-shaped rod is provided on the reference guide seat, and a limiting screw cooperating with the limiting groove is provided on the reference guide seat; an extrusion hydraulic rod cooperating with the U-shaped rod is provided on the reference guide seat, and a vertical plate is provided at the moving end of the extrusion hydraulic rod, and a vertical roller cooperating with the U-shaped rod and facilitating the vertical movement of the reference guide seat is provided on the vertical plate; a telescopic control cylinder cooperating with the first connecting rod and facilitating the adjustment of the welding position of the pipeline is provided on the reference guide seat, and a control screw cooperating with the first connecting rod is provided on the telescopic control cylinder;

[0027] The auxiliary lifting assembly includes an auxiliary lifting frame that slides with the stable reference frame, a group of hydraulic drive rods are horizontally arranged on the auxiliary lifting frame, one of the hydraulic drive rods is connected to the same regulating plate, the regulating plate is provided with a regulating cross cylinder that cooperates with the second connecting rod, the regulating cross cylinder is provided with a regulating screw that cooperates with the second connecting rod, and the stable reference frame is provided with a vertical lifting unit for driving the auxiliary lifting frame to perform vertical movement.

[0028] Furthermore, the two-stage lifting assembly includes a rotating base arranged on the top surface of the vertical base, the rotating base is provided with a lifting turntable that rotates with the rotating base, the rotating base is provided with a rotating unit for driving the lifting turntable to rotate, the lifting turntable is provided with a flexible lifting unit, and the vertical through groove is provided with an auxiliary clamping unit that cooperates with the flexible lifting unit.

[0029] Further, the auxiliary clamping unit comprises a clamping slide symmetrically arranged in the vertical through groove, the clamping slide is provided with a top support slide bar slidably matched with the clamping slide bar, the top support slide bar is provided with a resisting arc plate in contact with the pipe to be welded, and the vertical base is provided with a top support hydraulic rod for driving the top support slide bar to move;

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

[0031] The mobile reference frame in the present invention can be flexibly moved on the floor of the building through the translation wheels, and can easily reach the pipe welding points at different locations in special buildings such as hospitals. After arriving, the stable top support unit in the translation stabilization assembly contacts the ceiling, and the stable support unit contacts the floor, forming a stable support structure to prevent the platform from moving and provide a stable foundation for welding operations. This structural design ensures that in a complex and changeable hospital environment with extremely high stability requirements, the platform can always remain stable and will not shake due to slight external vibrations or personnel movement, thereby ensuring the accuracy and safety of welding operations.

[0032] The positioning reference platform of the present invention can slide on the mobile base frame and adjust the height, and can also be firmly connected to the stable reference frame through the positioning rod assembly, so that the positioning process is flexible and accurate. In the case of complex layout of various pipelines in the hospital, the platform can be quickly and accurately adjusted according to the actual position of the pipeline to meet the needs of different pipeline welding.

[0033] The rotating positioning frame, positioning telescopic rod, and positioning lifting assembly in the positioning reference mechanism of the present invention cooperate with each other to achieve the angle adjustment of the pipeline in the plane and the precise positioning in the horizontal and vertical directions. Through the rotating positioning frame of the gear transmission structure, the pipeline can be rotated to any suitable angle to adapt to the welding of pipelines with different directions. The positioning telescopic rod can finely adjust the position of the positioning base, and the positioning arc block lifted by the positioning hydraulic rod can ensure that the pipeline is at the accurate welding height. In the hospital environment, facing pipelines of various directions and heights, this multi-dimensional precise adjustment capability can greatly improve the welding quality and efficiency.

[0034] The transport frame of the stable lifting mechanism in the present invention is connected to the main platform through a stable locking assembly to ensure stability during transportation. The transport base frame and the auxiliary lifting assembly can smoothly lift the pipeline to the welding height, and the two-stage lifting assembly can further accurately adjust the height. The flexible lifting unit and the flexible motor can cooperate to achieve flexible adjustment to avoid damage to the pipeline. In places such as hospitals that have high requirements for equipment and personnel safety, this safe and convenient lifting design not only effectively reduces the labor intensity of construction workers, but also prevents pipelines from being damaged due to collision or falling during transportation and lifting, reducing safety hazards. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0036] Figure 2 It is a schematic diagram of the overall structure of the present invention except for the stable lifting mechanism;

[0037] Figure 3 It is a schematic diagram of the coordination of the mobile reference frame and the positioning reference platform of the present invention;

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

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

[0040] Figure 6 An exploded view of the positioning reference platform, the positioning reference mechanism and the stable support assembly of the present invention from a second viewing angle;

[0041] Figure 7 It is a schematic diagram of the coordination of the stable reference frame and the stable lifting mechanism of the present invention;

[0042] Figure 8 It is a diagram showing the coordination of the stable reference frame, part of the stable support assembly and the auxiliary lifting assembly of the present invention;

[0043] Fig. 9 It is a schematic diagram of the cooperation between the positioning guide rail assembly and the stable lifting mechanism of the present invention;

[0044] Fig.10 It is a three-dimensional structural schematic diagram of a partial structure of the stable lifting mechanism of the present invention.

[0045] Among them, the accompanying drawings are marked as follows: 100, mobile reference frame; 110, mobile base; 120, mobile base frame; 130, stable docking frame; 200, translation and stabilization assembly; 210, translation wheels; 220, stable top support unit; 230, stable support unit; 300, positioning reference platform; 310, reference slide; 320, lifting rack; 330, positioning plug rod assembly; 331, electric plug rod; 332, stable plug plate; 333, stable slot; 340, horizontal adjustment seat; 350, fine-tuning platform; 360, horizontal fine-tuning assembly; 361, driving groove; 362, driving screw; 363, driving block; 364, guide groove; 365, guide block; 366, socket rod; 400, lifting assembly; 500, positioning base 510, reference through groove; 520, rotating positioning frame; 521, rotating circular frame; 522, rotating ring seat; 523, rotating base; 524, rotating fixed seat; 525, first connecting frame; 530, stable rotation assembly; 531, stable gear; 532, driving gear; 533, driving motor; 534, rotating gear ring; 535, stable 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, expansion and support telescopic rod; 582, connecting base; 583, conflicting plug rod; 6 00, stable reference frame; 610, movable base; 620, vertical base frame; 630, stable alignment frame; 700, stable support assembly; 710, support slide; 720, stable guide rod; 730, stable base; 740, adjustable base; 750, socket sleeve; 760, adjustable groove; 770, adjustable guide rod; 780, auxiliary capstan; 790, auxiliary capstan rope; 800, stable lifting mechanism; 810, transport frame; 820, stable locking assembly; 821, locking frame; 822, locking expansion rod; 823, locking circular groove; 830, transport 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, limit groove;844, limit screw;845, extrusion hydraulic rod;846, vertical plate;847, vertical roller;848, telescopic control cylinder;849, control screw;850, auxiliary lifting assembly;851, auxiliary lifting frame;852, hydraulic drive rod;853, control plate;854, control cross cylinder;855, control 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 cloth; 865, auxiliary clamping unit; 8651, top support slide bar; 8652, contact arc plate; 8653, top support hydraulic rod. ; DETAILED DESCRIPTION

[0046] See also Figures 1 to 10 As shown, a lifting platform for welding building HVAC pipes includes a mobile reference frame 100, on which a translation stabilizing assembly 200 is provided, on which a positioning reference platform 300 is provided which is slidably matched with the mobile reference frame 100 and is used to facilitate construction personnel to determine the position for high-altitude welding operations, on which a lifting assembly 400 which cooperates with the positioning reference platform 300 is provided, and on which a positioning reference mechanism 500 which is used to facilitate welding operations on pipes to be welded is provided;

[0047] A stable reference frame 600 cooperating with the mobile reference frame 100 is arranged at the other side of the mobile reference frame 100, a mobile stable component is arranged on the stable reference frame 600, and a stable support component 700 cooperating with the positioning reference platform 300 is arranged on the stable reference frame 600, and a stable lifting mechanism 800 cooperating with the positioning reference mechanism 500 and used to move the pipe to be welded to the pipe to be welded position is arranged on the stable reference frame 600.

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

[0049] Further, the mobile reference frame 100 includes a mobile base 110 that cooperates with the translation and stabilization assembly 200, the mobile base 110 is provided with a mobile base 120 that cooperates with the positioning reference platform 300, and the mobile base 110 is provided with a stable docking frame 130 that cooperates with the stable reference frame 600 and the stable connection mechanism;

[0050] The translation stabilization assembly 200 includes a translation wheel 210 disposed on the mobile base 110, a stabilizing support unit 220 in contact with the building ceiling is disposed on the mobile base 120, and a stabilizing support unit 230 cooperating with the stabilizing support unit 220 is disposed on the mobile base 110;

[0051] The structure of the mobile stabilizing assembly is consistent with the structure of the translation stabilizing assembly 200 .

[0052] The above-mentioned stable top support unit 220 is in contact with the ceiling of the building, and the above-mentioned stable resistance unit is in contact with the floor of the building, and according to specific needs, the structure of the stable top support unit 220 and the structure of the stable resistance unit 230 can be set to be consistent.

[0053] The above-mentioned stable supporting units 230 are all configured as a resistance rod driven by a hydraulic rod, and a resistance plate in contact with the floor of the building is provided on the resistance rod.

[0054] Specifically, the mobile base 110 is the foundation of 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 cooperates with the stable reference frame 600 to achieve the connection between the two. The three together construct a stable frame structure for carrying the positioning reference platform 300 and connecting with other components to adapt to the complex spatial layout and pipeline distribution in special buildings such as hospitals.

[0055] The translation and stabilization assembly 200 solves the problem of flexible movement and stable fixation of the platform in the building, especially in special building environments such as hospitals, to avoid the impact of platform shaking or instability on welding operations and surrounding facilities. The translation wheels 210 realize the planar movement of the platform, and the stable top support unit 220 and the stable support unit 230 contact the building structure from the upper and lower directions respectively to provide stable support force.

[0056] Further, the positioning reference platform 300 includes a reference slide 310 that is slidably matched with the mobile base frame 120, and the reference slide 310 is provided with a lifting bracket 320 that is matched with the lifting assembly 400, and the reference slide 310 is provided with a positioning rod assembly 330 that is matched with the mobile base frame 120, and 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 seat 340 is provided with a fine-tuning platform 350 that slidably cooperates with the horizontal adjustment seat 340, the horizontal adjustment seat 340 is provided with a horizontal fine-tuning assembly 360 that cooperates with the fine-tuning platform 350, the positioning reference mechanism 500 is provided on the fine-tuning platform 350, and the fine-tuning platform 350 is provided with a socket rod 366 that sockets and cooperates with the stable support assembly 700.

[0058] Furthermore, the positioning plug rod assembly 330 includes an electric plug rod 331 symmetrically arranged on the reference slide 310, and a stabilizing plug plate 332 cooperating with the electric plug rod 331 is arranged on the mobile base frame 120, and a plurality of stabilizing slots 333 cooperating with the electric plug rod 331 are vertically opened on the stabilizing plug plate 332;

[0059] The horizontal fine-tuning assembly 360 includes a driving groove 361 horizontally opened on the horizontal adjustment seat 340, a driving screw 362 is arranged in the driving groove 361, a driving block 363 is arranged on the fine-tuning platform 350, which is slidably matched with the driving groove 361 and matched with the driving screw 362, and a guide groove 364 is opened on the horizontal adjustment seat 340 and matched with the fine-tuning platform 350, and a guide block 365 is arranged on the fine-tuning platform 350 and matched with the guide groove 364.

[0060] Specifically, the reference slide 310 slides on the mobile base frame 120 to adjust the position, 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 connected in a socket-and-socket manner to achieve a stable connection, thereby achieving precise adjustment of the position height of the platform and ensuring a stable connection with the stable reference frame 600, providing a stable foundation for pipeline positioning and improving welding quality and efficiency. In addition, the horizontal adjustment seat 340 provides an installation foundation for the fine-tuning platform 350, and the driving screw 362 drives the driving block 363 in the driving groove 361 to drive the fine-tuning platform 350 to slide along the guide groove 364 to achieve horizontal fine-tuning, thereby improving the positioning accuracy of the horizontal position of the pipeline, meeting the strict requirements of welding on the pipeline position, and reducing welding defects caused by pipeline position deviation.

[0061] The specific features of the present invention are that the positioning reference mechanism 500 includes a reference through-groove 510 provided on the fine-tuning platform 350, a rotating positioning frame 520 colinear with the axis of the reference through-groove 510 is provided on the fine-tuning platform 350, a rotating base 523 rotatably matched with the rotating positioning frame 520 is provided on the rotating positioning frame 520, and a smooth rotating component 530 is provided on the rotating positioning frame 520 to enable the rotating base 523 to perform smooth rotational motion on the rotating positioning frame 520;

[0062] The rotating base 523 is provided with a group of positioning telescopic rods 540 whose telescopic direction is consistent with the radial direction of the rotating positioning frame 520, and the telescopic ends of a group of positioning telescopic rods 540 are commonly connected to the same positioning base 550, and the positioning base 550 is provided with a positioning lifting assembly 560 in contact with the pipeline, and the bottom end of the positioning base 550 is provided with a positioning base cylinder 570, and 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 a positioning arc block 562 cooperating with the pipeline is disposed at the movable end of the positioning hydraulic rod 561;

[0064] The positioning guide rail assembly 580 includes an expansion and telescopic rod 581, an expansion plate is provided at the top end of the expansion and telescopic rod 581, and an interference plug rod 583 that cooperates with the positioning base tube 570 is provided on the expansion plate. A connecting base plate 582 connected to the movable reference frame 100 is provided at the bottom end of the expansion and telescopic rod 581, and connecting screws connected to the movable reference frame 100 are provided on the connecting base plate 582.

[0065] Specifically, the connection base 582 is connected to the stable docking frame 130 in the mobile reference frame 100 .

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

[0067] The stable rotation assembly 530 includes a plurality of stable gears 531 disposed on the rotating ring seat 522 and uniformly disposed along the circumferential direction of the rotating ring seat 522, and a driving gear 532 matched with the stable gear 531 is disposed on the rotating ring seat 522, and a driving motor 533 matched with the driving gear 532 is disposed on the rotating ring seat 522;

[0068] The rotating ring seat 522 is provided with a rotating gear ring 534 meshing with the stabilizing gear 531 and the driving gear 532 and fixedly connected to the rotating base 523, and the rotating gear 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 disposed at the top of the rotating fixed base 524 , and the first connecting frame 525 is connected to the rotating gear ring 534 .

[0070] Furthermore, in the positioning reference mechanism 500, the rotating positioning frame 520 drives the rotating base 523 to rotate through the gear transmission structure, thereby adjusting the angle of the positioning base 550, so that the pipeline can be rotated in the plane to a suitable welding angle, improving the convenience and quality of welding, and ensuring that the welding work can proceed smoothly. The positioning lifting assembly 560 lifts the pipeline to the height required for welding, reduces the labor intensity of the construction personnel, ensures the stability of the lifting process, and ensures the safety of the welding operation. The positioning guide rail assembly 580 guides the pipeline to move accurately to the position to be welded, ensures the accuracy of the pipeline position, and avoids damage to surrounding facilities during the movement.

[0071] Preferably, the stabilizing counterweight unit 535 includes a plurality of counterweight bases 536 arranged along the circumference of the rotating gear 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 arranged at the bottom end of the mating base, and a counterweight block 538 is arranged on the counterweight frame 537.

[0072] Preferably, two types of matching relationships between the rotating ring seat 522 and the rotating base 523 are provided, as follows:

[0073] First, a through circular groove is formed on the rotating ring seat 522 to be slidably matched with the first connecting frame 525; when in use, the first connecting frame 525 passes through the through circular groove.

[0074] Secondly, the rotating ring seat 522 is provided with a smooth circular groove, and a second connecting frame is arranged on the top surface of the rotating fixed seat 524. The first connecting frame 525 and the second connecting frame are symmetrically arranged. A sliding plate is arranged on the second connecting frame, and a smooth sliding block that slides with the smooth circular groove is arranged on the sliding plate; and the cross-section of the rotating positioning frame 520 is an inverted T shape.

[0075] Further, the stable reference frame 600 includes a movable base 610 that cooperates with the mobile stable assembly, a vertical base 620 that cooperates with the stable support assembly 700 is provided on the movable base 610, and a stable alignment frame 630 that cooperates with the mobile reference frame 100 and the stable connection mechanism is provided on the movable base 610;

[0076] The stable support assembly 700 includes a support slide 710 that slides with the vertical base frame 620, and the vertical base frame 620 is provided with a stable guide rod 720 that slides with the support slide 710, the support slide 710 is provided with a stable base 730 that cooperates with the positioning reference platform 300, the stable base 730 is provided with an adjustment base 740 that slides with the stable base, the adjustment base 740 is provided with a socket sleeve 750 that sockets with the positioning reference platform 300, the stable base 730 is provided with an adjustment groove 760 that slides with the adjustment base 740, and the adjustment groove 760 is provided with an adjustment guide rod 770 that cooperates with the adjustment base 740.

[0077] Specifically, the socket sleeve 750 in the stabilizing support assembly 700 is in socket-fitted engagement with the socket rod 366 in the positioning reference platform 300 .

[0078] Furthermore, the socket sleeves 750 are provided in plurality, and correspondingly, the socket rods 366 are provided in plurality.

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

[0080] Specifically, the stable alignment frame 630 is docked with the stable docking frame 130 , and a connection groove connected to the stable alignment frame 630 is opened on the stable docking frame 130 , and a stable insertion rod is provided between the stable alignment frame 630 and the stable docking frame 130 .

[0081] Preferably, the mobile base 120 is provided with a triangular stabilizing frame which is slidably matched with the mobile base 120, connected to the horizontal base and used to provide stability to the horizontal base; the triangular stabilizing frame is provided with a limiting rod assembly which cooperates with the reference slide 310; the triangular stabilizing frame is provided with a stabilizing hinge rope connected to the mobile base 120; and the structure of the limiting rod assembly is consistent with the structure of the positioning rod assembly 330.

[0082] Specifically, the mobile stabilizing assembly provides support force by contacting with the building structure, and the stabilizing alignment frame 630 is docked with the stabilizing docking frame 130 of the mobile reference frame 100 and connected through a stabilizing plug rod, thereby enhancing the stability of the entire platform, preventing the platform from shaking or shifting during welding, and ensuring the smooth progress of the welding operation. The stabilizing support assembly 700 further enhances the connection stability between the platform and the pipeline, and at the same time assists the positioning reference platform 300 in positioning the pipeline, meeting the requirements for welding quality and safety in special buildings such as hospitals.

[0083] The specific features of the present invention are that the stable lifting mechanism 800 includes a transport frame 810 for transporting the pipe to be welded, the transport frame 810 is provided with a receiving slot for accommodating the positioning guide rail assembly 580, and the transport frame 810 is provided with a stable locking assembly 820 connected to the mobile reference frame 100 and the stable reference frame 600;

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

[0085] Further, the stabilizing locking assembly 820 includes locking frames 821 symmetrically arranged at both ends of the transport frame 810, the locking frames 821 are provided with locking expansion rods 822 that cooperate with the mobile reference frame 100 or the stabilizing reference frame 600, and the mobile reference frame 100 and the stabilizing reference frame 600 are provided with locking circular 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 which are respectively provided a first connecting rod 832 cooperating with the reference guide assembly 840 and a second connecting rod 833 cooperating with the auxiliary lifting assembly 850 , and a vertical through groove 834 is opened on the vertical base 831 .

[0087] Further, the reference guide assembly 840 includes a reference guide seat 841, on which a plurality of U-shaped rods 842 are vertically arranged, on which a limiting groove 843 cooperating with the U-shaped rod 842 is opened, and on which a limiting screw 844 cooperating with the limiting groove 843 is arranged;

[0088] The reference guide seat 841 is provided with an extrusion hydraulic rod 845 that cooperates with the U-shaped rod 842, and a vertical plate 846 is provided at the movable end of the extrusion hydraulic rod 845, and a vertical roller 847 that cooperates with the U-shaped rod 842 and facilitates the vertical movement of the reference guide seat 841 is provided on the vertical plate 846; 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;

[0089] The auxiliary lifting assembly 850 includes an auxiliary lifting frame 851 that slides with the stable reference frame 600, and a group of hydraulic drive rods 852 are horizontally arranged on the auxiliary lifting frame 851. One of the hydraulic drive rods 852 is commonly connected to the same adjustment plate 853, and the adjustment plate 853 is provided with an adjustment cross cylinder 854 that cooperates with the second connecting rod 833. The adjustment cross cylinder 854 is provided with an adjustment 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 lifting frame 851 to perform vertical movement.

[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 screw rod.

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

[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 8651 that slides with the clamping slide, the top support slide 8651 is provided with a contact arc plate 8652 that contacts the pipe to be welded, and the vertical base 831 is provided with a top support hydraulic rod 8653 for driving the top support slide 8651 to move;

[0093] 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 arranged on the lifting base frame 8641, a lifting flexible frame 8643 is arranged at the moving end of the lifting hydraulic rod 8642, a flexible roller 8644 is arranged on the lifting flexible frame 8643, a flexible motor 8645 cooperating with the flexible roller 8644 is arranged on the lifting flexible frame 8643, a flexible capstan 8646 is arranged in the flexible roller 8644, and a flexible lifting cloth 8647 is arranged between the two flexible capstans 8646.

[0094] Specifically, the transport frame 810 is used to carry the pipeline, and the stabilizing locking assembly 820 is connected by locking the expansion rod 822 and cooperating with the locking circular groove 823 of the mobile reference frame 100 and the stabilizing reference frame 600. The vertical base frame 620 moves vertically under the drive of the auxiliary lifting assembly 850, and the reference guide seat 841 in the reference guide assembly 840 guides the vertical movement through the U-shaped rod 842, the limit groove 843, the limit screw 844 and other structures, and 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 accurately adjust the height of the pipeline to meet the complex welding position requirements, especially in special buildings such as hospitals where the pipeline layout is complex and the welding position is changeable. The lifting rotating frame 862 drives the flexible lifting unit 864 to rotate under the drive of the rotating unit 863, the flexible roller 8644 rotates under the drive of the flexible motor 8645, and the supporting slide bar 8651 adjusts the vertical height of the pipeline under the drive of the supporting hydraulic rod 8653.

[0095] Movement of the mobile reference frame 100: The mobile reference frame 100 is moved on the building floor by the translation wheels 210, so as to facilitate the transportation of the entire platform to the location where the pipe welding is required. When it reaches a roughly suitable position, the translation stabilization component 200 comes into play. Among them, the stabilization top support unit 220 contacts the building ceiling, and the stabilization support unit 230 contacts the building floor. Through this upper and lower support method, the mobile reference frame 100 is fixed in the building space to prevent the platform from moving during subsequent operations, providing a stable foundation for welding operations.

[0096] Positioning adjustment of the positioning reference platform 300: The positioning reference platform 300 can slide on the mobile base frame 120, and the horizontal position of the fine adjustment platform 350 can be accurately adjusted by the horizontal fine adjustment component 360 through the cooperation of the horizontal adjustment seat 340 and the fine adjustment platform 350. At the same time, the positioning reference platform 300 can be adjusted in height through the lifting component 400 to meet the requirements of pipeline welding at different heights.

[0097] Positioning operation of the positioning reference mechanism 500: The positioning reference mechanism 500 is located on the positioning reference platform 300, wherein the rotating positioning frame 520 can rotate around the transmission structure composed of the stabilizing gear 531 and the driving gear 532, so as to facilitate the adjustment of the angle of the positioning base 550 to adapt to pipelines with different directions. The positioning telescopic rod 540 can further adjust the position of the positioning base 550, so as to accurately determine the position of the pipeline to be welded. The positioning hydraulic rod 561 in the positioning lifting assembly 560 drives the positioning arc block 562 to lift the pipeline so that the pipeline is at a suitable welding height. The positioning guide rail assembly 580 guides the pipeline to accurately move to the position to be welded through the cooperation of the expansion telescopic rod 581, the expansion plate, the resistance rod 583 and the positioning base tube 570.

[0098] Auxiliary positioning and lifting of the stable lifting mechanism 800: The transport frame 810 in the stable lifting mechanism 800 is connected to the mobile reference frame 100 and the stable reference frame 600 through the stable locking assembly 820 to ensure the stability of the transport frame 810. The vertical base frame 620 moves vertically under the drive of the auxiliary lifting assembly 850 to lift the pipeline to a certain height. The two-stage lifting assembly 860 further accurately adjusts the height of the pipeline. The lifting rotating frame 862 drives the flexible lifting unit 864 to rotate under the drive of the rotating unit 863, and the flexible roller 8644 rotates under the drive of the flexible motor 8645 to accurately lift the pipeline to the welding position.

[0099] Function of the stable reference frame 600: The stable reference frame 600 is arranged corresponding to the mobile reference frame 100, and the stability of the entire platform is further enhanced through the socket-and-socket fit of the stable support assembly 700 and the positioning reference platform 300. The stable reference frame 600 is also fixed to the building through its own mobile stable assembly, and the stable alignment frame 630 is docked with the stable docking frame 130 of the mobile reference frame 100 and a stable plug rod is set to ensure a stable connection between the two. The mobile reference frame 100, the stable reference frame 600 and the positioning reference platform 300 cooperate with each other to form a stable support system. At the same time, the positioning reference mechanism 500 and the stable lifting mechanism 800 work together to ensure that the pipeline is accurately positioned in the horizontal and vertical directions, and can be stably lifted to the welding height.

[0100] Technical features not described in the present invention can be achieved through or by adopting existing technologies and will not be described in detail here. Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or substitutions made by ordinary technicians in this technical field within the essential scope of the present invention should also fall within the scope of protection of the present invention.

Claims

1. A lifting platform for welding building HVAC pipelines, characterized by: The invention comprises a mobile reference frame (100), the mobile reference frame (100) is provided with a translation stabilizing component (200), the mobile reference frame (100) is provided with a positioning reference platform (300) which is slidably matched with the mobile reference frame (100) and is used for construction personnel to determine the position for high-altitude welding operations, the mobile reference frame (100) is provided with a lifting component (400) which is matched with the positioning reference platform (300), and the positioning reference platform (300) is provided with a positioning reference mechanism (500) which is used for facilitating welding operations on a pipeline to be welded; A stable reference frame (600) cooperating with the mobile reference frame (100) is arranged at the other side of the mobile reference frame (100), a mobile stable component is arranged on the stable reference frame (600), and a stable support component (700) cooperating with the positioning reference platform (300) is arranged on the stable reference frame (600), and a stable lifting mechanism (800) cooperating with the positioning reference mechanism (500) and used to move the pipe to be welded to the pipe to be welded position is arranged on the stable reference frame (600).

2. A lifting platform for building HVAC pipe welding as claimed in claim 1, characterized in that: The mobile reference frame (100) comprises a mobile base (110) cooperating with the translation stabilization component (200), the mobile base (110) is provided with a mobile base (120) cooperating with the positioning reference platform (300), and the mobile base (110) is provided with a stable docking frame (130) cooperating with the stable reference frame (600) and the stable connection mechanism; The translation stabilization assembly (200) comprises a translation wheel (210) arranged on the mobile base (110); the mobile base (120) is provided with a stabilizing support unit (220) in contact with the building ceiling; the mobile base (110) is provided with a stabilizing support unit (230) cooperating with the stabilizing support unit (220); The structure of the mobile stabilizing component is consistent with the structure of the translation stabilizing component (200).

3. A lifting platform for building HVAC pipe welding as claimed in claim 2, characterized in that: The positioning reference platform (300) comprises a reference slide (310) slidably matched with the mobile base frame (120), and the reference slide (310) is provided with a lifting bracket (320) matched with the lifting assembly (400), and the reference slide (310) is provided with a positioning rod assembly (330) matched with the mobile base frame (120), and 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-tuning platform (350) that is slidably matched with the horizontal adjustment seat (340), the horizontal adjustment seat (340) is provided with a horizontal fine-tuning assembly (360) that is matched with the fine-tuning platform (350), the positioning reference mechanism (500) is provided on the fine-tuning platform (350), and the fine-tuning platform (350) is provided with a socket rod (366) that is socket-matched with the stable support assembly (700).

4. A lifting platform for building HVAC pipe welding as claimed in claim 3, characterized in that: The positioning reference mechanism (500) comprises a reference through-groove (510) provided on the fine-tuning platform (350); a rotating positioning frame (520) colinear with the axis of the reference through-groove (510) is provided on the fine-tuning platform (350); a rotating base (523) rotatingly matched with the rotating positioning frame (520) is provided on the rotating positioning frame (520); and a smooth rotating assembly (530) is provided on the rotating positioning frame (520) to enable the rotating base (523) to perform smooth rotational motion on the rotating positioning frame (520); The rotating base (523) is provided with a group of positioning telescopic rods (540) whose telescopic direction is consistent with the radial direction of the rotating positioning frame (520); the telescopic ends of a group of positioning telescopic rods (540) are commonly connected to the same positioning base (550); the positioning base (550) is provided with a positioning lifting assembly (560) in contact with the pipeline; 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).

5. A lifting platform for building HVAC pipe welding as claimed in claim 3, characterized in that: The rotating positioning frame (520) comprises a rotating circular frame (521) arranged on the fine-tuning platform (350), and a rotating ring seat (522) cooperating with the stable rotation component (530) is arranged on the rotating circular frame (521); The stable rotation assembly (530) comprises a plurality of stable gears (531) arranged on the rotating ring seat (522) and evenly arranged along the circumferential direction of the rotating ring seat (522), and a driving gear (532) matched with the stable gear (531) is arranged on the rotating ring seat (522), and a driving motor (533) matched with the driving gear (532) is arranged on the rotating ring seat (522); The rotating ring seat (522) is provided with a rotating gear ring (534) meshing with the stabilizing gear (531) and the driving gear (532) and fixedly connected to the rotating base (523), and the rotating gear ring (534) is provided with a stabilizing counterweight unit (535) connected to the rotating base (523); The rotating base (523) comprises a rotating fixed seat (524) connected to the positioning telescopic rod (540), a first connecting frame (525) is arranged at the top end of the rotating fixed seat (524), and the first connecting frame (525) is connected to the rotating gear ring (534).

6. A lifting platform for building HVAC pipe welding as claimed in claim 5, characterized in that: The stable reference frame (600) comprises a movable base (610) cooperating with the mobile stable assembly, the movable base (610) is provided with a vertical base (620) cooperating with the stable support assembly (700), and the movable base (610) is provided with a stable alignment frame (630) cooperating with the mobile reference frame (100) and the stable connection mechanism; The stable support assembly (700) includes a support slide (710) that is slidably matched with the vertical base frame (620), and the vertical base frame (620) is provided with a stable guide rod (720) that is slidably matched with the support slide (710), the support slide (710) is provided with a stable base (730) that is matched with the positioning reference platform (300), the stable base (730) is provided with an adjustment base (740) that is slidably matched with the stable base, the adjustment base (740) is provided with a socket sleeve (750) that is socket-matched with the positioning reference platform (300), the stable base (730) is provided with an adjustment groove (760) that is slidably matched with the adjustment base (740), and the adjustment groove (760) is provided with an adjustment guide rod (770) that is matched with the adjustment base (740).

7. A lifting platform for building HVAC pipe welding as claimed in claim 1, characterized in that: The stable lifting mechanism (800) comprises a transport frame (810) for transporting the pipe to be welded, the transport frame (810) is provided with a receiving slot for receiving a positioning guide rail assembly (580), and the transport frame (810) is provided with a stable locking assembly (820) connected to the movable reference frame (100) and the stable reference frame (600); The transport frame (810) is provided with a transport base frame (830), the positioning 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 a 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 welding position.

8. A lifting platform for building HVAC pipe welding as claimed in claim 7, characterized in that: The stabilizing locking assembly (820) comprises locking frames (821) symmetrically arranged at both ends of the transport vehicle frame (810), the locking frames (821) being provided with locking expansion rods (822) cooperating with the mobile reference frame (100) or the stabilizing reference frame (600), and the mobile reference frame (100) and the stabilizing reference frame (600) being provided with locking circular grooves (823) cooperating with the locking expansion rods (822); The transport base frame (830) includes a vertical base (831), and a first connecting rod (832) cooperating with the reference guide assembly (840) and a second connecting rod (833) cooperating with the auxiliary lifting assembly (850) are respectively arranged at both ends of the vertical base (831), and a vertical through groove (834) is opened on the vertical base (831); The reference guide assembly (840) comprises a reference guide seat (841), a plurality of U-shaped rods (842) are vertically arranged on the reference guide seat (841), a limiting groove (843) cooperating with the U-shaped rod (842) is opened on the reference guide seat (841), and a limiting screw (844) cooperating with the limiting groove (843) is arranged on the reference guide seat (841); an extrusion hydraulic rod (845) cooperating with the U-shaped rod (842) is arranged on the reference guide seat (841), and the extrusion hydraulic rod (845) The movable 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) which 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) which 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) which cooperates with the first connecting rod (832); The auxiliary lifting assembly (850) includes an auxiliary lifting frame (851) that is slidably matched with the stable reference frame (600), a group of hydraulic drive rods (852) are horizontally arranged on the auxiliary lifting frame (851), one of the hydraulic drive rods (852) is commonly connected to the same regulating plate (853), the regulating plate (853) is provided with a regulating cross cylinder (854) that cooperates with the second connecting rod (833), the regulating cross cylinder (854) is provided with a regulating screw (855) that cooperates with the second connecting rod (833), and the stable reference frame (600) is provided with a vertical lifting unit (856) for driving the auxiliary lifting frame (851) to perform vertical movement.

9. A lifting platform for building HVAC pipe welding as claimed in claim 7, characterized in that: The two-stage lifting assembly (860) includes a rotating base (861) arranged on the top surface of the vertical base (831), the rotating base (861) is provided with a lifting turntable (862) that rotates with the rotating base (861), the rotating base (861) is provided with a rotating unit (863) for driving the lifting turntable (862) to rotate, the lifting turntable (862) is provided with a flexible lifting unit (864), and the vertical through groove (834) is provided with an auxiliary clamping unit (865) that cooperates with the flexible lifting unit (864).

10. A lifting platform for building HVAC pipe welding as claimed in claim 9, characterized in that: The auxiliary clamping unit (865) comprises a clamping slide symmetrically arranged in the vertical through groove (834), the clamping slide is provided with a top support slide bar (8651) slidably matched with the clamping slide bar, the top support slide bar (8651) is provided with a contact arc plate (8652) in contact with the pipe to be welded, and the vertical base (831) is provided with a top support hydraulic rod (8653) for driving the top support slide bar (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 arranged on the lifting base frame (8641), a lifting flexible frame (8643) is arranged at the moving end of the lifting hydraulic rod (8642), a flexible roller (8644) is arranged on the lifting flexible frame (8643), a flexible motor (8645) cooperating with the flexible roller (8644) is arranged on the lifting flexible frame (8643), a flexible winch (8646) is arranged in the flexible roller (8644), and a flexible lifting cloth (8647) is arranged between the two flexible winches (8646).

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