Lifting device for ductwork installation

Abstract

The utility model provides a lifting device for air pipe installation belongs to the technical field of building construction auxiliary equipment, the device includes frame system, lifting platform, drive arrangement and clamping device. Frame system is by frame base, universal bearing wheel, stand and crossbeam constitutes, provides movement and stable support. Lifting platform passes through guide wheel and is cooperated with the guide slide on the stand, can be set up in frame system in lifting. Drive arrangement contains winch, servo motor and pulley block, through wire rope traction lifting platform. Clamping device is by the clamping block of being able to move and locking on the platform slide and the replaceable clamping plate composition, is used for adapting different specifications and shape's air pipe. The utility model through mobile frame realizes flexible shift, through remote control lifting and adjustable clamping realizes quick, accurate positioning, effectively solved the problem of low efficiency, poor safety and insufficient adaptability of traditional air pipe installation method, has the advantages of stable structure, safe operation, wide application range.

Description

Technical Field

[0001] This utility model belongs to the technical field of auxiliary equipment for building construction, and specifically relates to a lifting device for duct installation. Background Technology

[0002] As the construction industry transforms towards high-rise, large-scale, and intelligent buildings, ventilation systems, as a core component of building electromechanical engineering, are showing a development trend of "larger size, heavier weight, and higher density" in their duct components. Duct installation, as a crucial part of building construction, directly impacts the ventilation effect and safety of the building through its construction efficiency and quality.

[0003] Traditional duct installation relies heavily on manual handling, scaffolding erection, or the use of simple hoisting equipment (such as hand-operated hoists). These methods are inefficient, labor-intensive, pose numerous safety hazards, and have poor adaptability. Especially in confined spaces or high-ceilinged construction environments, scaffolding erection is difficult and costly, and the selection of fixing points for hand-operated hoists is limited, hindering flexible relocation. Traditional methods struggle to achieve fast, accurate, and safe installation operations.

[0004] Meanwhile, the national requirements for construction safety and green construction continue to escalate. The "Construction Safety Inspection Standard" clearly stipulates that standardized load-bearing equipment must be used for high-altitude operations, and the traditional method of manually lifting ducts is gradually being restricted due to the risk of falls and non-compliance with safety regulations. Against this backdrop, there is an urgent need for a lifting device that can improve installation efficiency, reduce labor intensity, ensure construction safety, and be applicable to various types of ducts, in order to balance the relationship between "construction efficiency, safety assurance, and cost control". Utility Model Content

[0005] The technical problem solved by this utility model: In view of the shortcomings of the prior art, the purpose of this utility model is to provide a lifting device for duct installation, which adjusts and fixes the position of the duct by clamping blocks and quickly lifts the duct to the specified installation height, thus solving the problems of low installation efficiency, poor safety and insufficient adaptability of the prior art, and realizing flexible, fast, accurate and safe operation of duct installation.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: Lifting devices for duct installation include: The frame system includes a frame base, multiple omnidirectional load-bearing wheels fixed to the bottom of the frame base, multiple uprights fixed to the frame base, and crossbeams fixedly connected to the top of the multiple uprights. A lifting platform is installed within the vehicle frame system in a height-adjustable manner, and a guide mechanism is provided between the lifting platform and the column; A drive unit, mounted on the chassis system, is used to drive the lifting platform to move up and down; A clamping device is provided on the lifting platform for clamping and fixing the air duct.

[0007] Further defining the above solution, the guiding mechanism includes a guide slide disposed on the inner side of the column and a guide wheel disposed on the lifting platform and cooperating with the guide slide.

[0008] Further specifying the above solution, the guide wheel is made of nylon, and the gap between the guide wheel and the guide slide is no more than 2mm.

[0009] Further defining the above solution, the driving device includes a winch and a servo motor fixed to the chassis base, a pulley block fixed to the crossbeam, and a wire rope wound around the winch and connected to the lifting platform after passing through the pulley block; the servo motor drives the winch and can be controlled by a handheld remote control.

[0010] Further defining the above solution, the clamping device includes at least one slide rail on the lifting platform, multiple sets of clamping blocks slidably disposed in the slide rail, and a locking member for fixing the clamping blocks to the slide rail; the clamping blocks are provided with clamping plates for contacting the air duct.

[0011] Further defining the above solution, the lower part of the clamping block is provided with a T-shaped slider, the slide is a T-shaped groove adapted to the T-shaped slider; the locking element is a tightening bolt; the clamping plate is a vertical plate or an arc-shaped rubber clamping plate, and is replaceably installed on the clamping block by clamping plate screws.

[0012] To further define the above solution, the frame system is provided with a limiting device to restrict the maximum lifting height of the lifting platform; the limiting device includes a top limiter located at the top of the column and a bottom limiter located on the frame base.

[0013] Further defining the above solution, the top limiter includes a steel limiter block and a rubber buffer block arranged from top to bottom; the bottom limiter is a rubber buffer block.

[0014] Further defining the above solution, a counterweight box is provided on the chassis base; the surface of the lifting platform is covered with anti-slip rubber pads; and railing insertion interfaces for installing guardrails are reserved on the four sides of the lifting platform.

[0015] As a further limitation of the above scheme, the omnidirectional load-bearing wheel is an omnidirectional wheel with a braking function.

[0016] Advantages of this utility model compared to the prior art: 1. This solution features a composite structure design, offering high mobility, flexibility, and ease of manufacturing and use: the composite structure of a steel frame and an aluminum alloy lifting platform combines high strength with lightweight design, enhancing overall stability. The wheel system is integrated into the bottom of the frame, allowing for easy pushing and moving without additional tools. 2. This solution features a modular design for quick assembly and disassembly: the various functional modules (such as the frame, lifting platform, and drive unit) are mainly connected by bolts, which is highly standardized, convenient for installation and disassembly, and has a short construction preparation time. It is also convenient for transportation and storage. 3. This solution is low-cost and highly adaptable to various environments: core components utilize common profiles and mature industrial-grade products, resulting in lower manufacturing costs. Its detachable and modular design not only meets the needs of lifting large-size ducts but also allows for disassembly and passage through standard indoor doorways, corridors, and elevators, adapting to diverse construction site environments. 4. This solution is safe and reliable: the guide wheels and slide rails are precisely matched, and the clearance is strictly controlled to ensure a smooth and wobbly lifting process. Multiple limit devices are installed to effectively prevent the lifting platform from overtraveling. Remote control operation supports both inching and continuous modes and is equipped with an emergency stop function, enabling separate operation of the operator and significantly improving construction safety and operational flexibility. Optional guardrails further enhance the safety of working at height. 5. This solution has a wide range of applications: the lifting platform's travel design covers the height range required for typical indoor pipe installation, meeting different floor heights and operational needs. The clamping block position is adjustable, and the clamping plates are replaceable, making it suitable for ducts of different specifications and cross-sections (circular, rectangular), with strong versatility, suitable for high-altitude installation of various indoor pipe projects. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the lifting device for duct installation according to this utility model; Figure 2 This is a schematic diagram of the frame system in this utility model; Figure 3 This is a schematic diagram of the structure of the vehicle frame base in this utility model; Figure 4 This is a schematic diagram of the lifting platform and clamping device in this utility model; Figure 5 This is a cross-sectional view of the clamping device in this utility model; Figure 6 This is a schematic diagram of the railing insertion interface on the lifting platform in this utility model. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0019] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0020] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0021] Please see Figure 1-6 The embodiments of this utility model are described in detail below.

[0022] The lifting device for duct installation provided by this utility model is described in the following reference. Figure 1 As shown, it mainly consists of a frame system, a lifting platform 5, a drive unit, and a clamping device.

[0023] See Figure 2 , Figure 3As shown, the frame system serves as the supporting skeleton and mobile foundation for the entire device. It includes a frame base 1, multiple omnidirectional load-bearing wheels 2 fixed to the bottom of the frame base 1, multiple uprights 3 fixed to the frame base 1, and crossbeams 4 fixedly connected to the tops of the uprights 3. The frame base 1 is welded from multiple high-strength profiles (such as rectangular tubes or H-beams), providing sufficient load-bearing capacity and stability. Four omnidirectional load-bearing wheels 2 with braking function are installed at the bottom of the frame base 1, secured with bolts for easy device movement and positioning during construction. A counterweight box (not shown separately in the figure) is located in the middle of the frame base 1, allowing for the addition or removal of counterweights according to the weight of the ductwork, adjusting the overall center of gravity and preventing tipping during lifting. The four frame uprights 3 are vertically fixed to the four corners of the upper part of the frame base 1 with bolts, and the upper ends of the uprights 3 are connected to the crossbeams 4 with bolts, forming a stable frame structure. Flat steel guide rails 10 are welded to the inner side of the uprights 3 for guiding and sliding the lifting platform during lifting.

[0024] See Figure 4 As shown, the lifting platform 5 is vertically mounted within the frame system to support and lift the air ducts. The lifting platform uses lightweight, high-strength aluminum alloy rectangular tubing welded into a crisscrossing frame structure (300mm longitudinal profile spacing, 400mm transverse profile spacing). Nylon guide wheels 9 are installed at the four corners of the lifting platform 5. The guide wheels 9 cooperate with the guide rails 10 on the uprights 3, with a gap of no more than 2mm between them to ensure smooth and wobbly lifting. The upper surface of the lifting platform 5 is covered with a thin steel plate and has T-slots as rails 12 for precise adjustment of the air duct's position. A 3mm thick nitrile rubber anti-slip mat (not shown in the figure) is laid on the platform surface and bonded with double-sided adhesive to effectively prevent air duct slippage. (See reference...) Figure 6 As shown, the platform has reserved railing insertion interfaces 17 on all four sides. When needed, guardrails can be inserted and fixed with jacking screws for transporting personnel or as a temporary work platform.

[0025] See Figure 1 As shown, the drive unit is mounted on the frame system and is used to drive the lifting platform 5 to rise and fall. It includes a winch 6 and a servo motor 7, both bolted to the frame base 1. The servo motor 7 is driven by the winch 6. Four sets of pulley blocks 8 are fixedly installed below the crossbeam 4. The wire rope on the winch 6 passes over these pulley blocks 8, and its end is connected to the wire rope binding point on the lifting platform 5. The servo motor 7 is controlled by a handheld remote control (not shown) to rotate forward and backward and start and stop, thereby driving the winch 6 to wind up and unwind the wire rope, which in turn pulls the lifting platform 5 smoothly up or down along the guide rail 10 via the pulley blocks 8. The remote control supports inching fine-tuning and continuous operation modes and is equipped with an emergency stop button to ensure operational safety.

[0026] See Figure 5As shown, a clamping device is installed on the lifting platform 5 for clamping and fixing the air duct. It includes at least one slide rail 12 on the lifting platform 5, and multiple sets of symmetrically arranged clamping blocks 11 at the slide rail 12 position. The lower part of each clamping block 11 has a T-shaped slider 13, which can be inserted into the slide rail 12 (T-slot) for left and right sliding. By tightening the tightening bolts 14, the clamping blocks 11 can be firmly positioned in the desired location, suitable for air ducts of different sizes. Each set of clamping blocks 11 is equipped with a clamping plate 15 by clamping plate screws 16. The clamping plate 15 can be a vertical plate (suitable for rectangular air ducts) or an arc-shaped rubber clamping plate (suitable for circular air ducts), which can be replaced according to the cross-sectional shape of the air duct, effectively clamping while preventing scratches on the air duct surface.

[0027] To ensure safety, the chassis system is equipped with limit devices to restrict the maximum lifting height of the lifting platform and prevent accidents. For details, please refer to [link / reference needed]. Figure 1 As shown, a top limiter 18 is installed on the top of the frame column 3. It has a double-layer structure: the lower layer is a 50mm thick, 100mm diameter rubber buffer block, and the upper layer is a 10mm thick, 100mm x 100mm steel limiter block. When the lifting platform 5 rises to its maximum safe height, it first contacts the rubber buffer block to absorb the impact, and then the steel limiter block rigidly limits the platform to prevent it from overtraveling. Four bottom limiters 19 are installed on the frame base 1. These are 50mm thick, 100mm x 100mm rubber buffer blocks used to buffer the impact when the lifting platform 5 descends to the bottom, reducing noise and wear.

[0028] Working principle: In use, first move the device to the duct stacking position and lock the brakes on the universal caster wheels 2. Adjust the weight of the duct to be installed by adding or removing counterweights in the counterweight box of the chassis base 1 to ensure stability. Select a suitable clamping plate 15 based on the shape (round or rectangular) and size of the duct and install it onto the clamping block 11. Slide the clamping block 11 to the appropriate distance and then lock it with the tightening bolt 14. Hoist or transport the duct to the lifting platform 5 and place it close to the positioned clamping block 11. If necessary, fine-tune the position of the clamping block 11 to ensure a secure clamping. Then, unlock the universal caster wheel brakes and push the entire device below the predetermined installation position of the duct, then lock the universal caster wheel brakes again. The operator uses a handheld remote control to control the servo motor 7 to drive the winch 6, which pulls the lifting platform 5 along the guide rail 10 via a wire rope and pulley system 8. During this process, the height of the lifting platform 5 can be finely adjusted using the inching mode to precisely align the duct with the installation position. After the installers complete the connection and fixing of the ductwork at height (such as on scaffolding or ladders) or via remote control, the lifting platform 5 is slowly lowered to its initial position using the remote control. The ductwork is then released (if necessary), and the device is moved to the installation point of the next duct section. Repeating this process allows for continuous and efficient installation operations.

[0029] This utility model effectively solves many drawbacks of traditional duct installation methods by combining a mobile frame, an adjustable clamping mechanism, remote-controlled lifting, and multiple safety protections, significantly improving installation efficiency, safety, and adaptability.

[0030] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0031] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A lifting device for duct installation, characterized in that: include: The frame system includes a frame base (1), multiple omnidirectional load-bearing wheels (2) fixed to the bottom of the frame base (1), multiple uprights (3) fixed to the frame base (1), and a crossbeam (4) fixedly connected to the top of the multiple uprights (3). The lifting platform (5) is vertically mounted within the frame system, and a guide mechanism is provided between the lifting platform (5) and the column (3); A drive unit, mounted on the chassis system, is used to drive the lifting platform (5) to lift. A clamping device is provided on the lifting platform (5) for clamping and fixing the air duct.

2. The lifting device for duct installation according to claim 1, characterized in that: The guiding mechanism includes a guide slide (10) disposed inside the column (3) and a guide wheel (9) disposed on the lifting platform (5) and cooperating with the guide slide (10).

3. The lifting device for duct installation according to claim 2, characterized in that: The guide wheel (9) is made of nylon, and the gap between the guide wheel (9) and the guide slide (10) is no more than 2mm.

4. The lifting device for duct installation according to claim 1, characterized in that: The drive device includes a winch (6) and a servo motor (7) fixed on the chassis base (1), a pulley block (8) fixed on the crossbeam (4), and a wire rope wound around the winch (6) and connected to the lifting platform (5) after passing through the pulley block (8); the servo motor (7) drives the winch (6) and can be controlled by a handheld remote control.

5. The lifting device for duct installation according to claim 1, characterized in that: The clamping device includes at least one slide (12) opened on the lifting platform (5), multiple sets of clamping blocks (11) slidably disposed in the slide (12), and a locking member for fixing the clamping blocks (11) to the slide (12); the clamping blocks (11) are provided with clamping plates (15) for contacting the air duct.

6. The lifting device for duct installation according to claim 5, characterized in that: The lower part of the clamping block (11) is provided with a T-shaped slider (13), and the slide (12) is a T-shaped groove adapted to the T-shaped slider (13); the locking member is a top bolt (14); the clamping plate (15) is a vertical plate or an arc-shaped rubber clamping plate, and is replaceably installed on the clamping block (11) by clamping plate screws (16).

7. The lifting device for duct installation according to claim 1, characterized in that: The frame system is provided with a limiting device to limit the maximum lifting height of the lifting platform (5); the limiting device includes a top limit (18) set on the top of the column (3) and a bottom limit (19) set on the frame base (1).

8. The lifting device for duct installation according to claim 7, characterized in that: The top limit (18) includes a steel limit block and a rubber buffer block arranged from top to bottom; the bottom limit (19) is a rubber buffer block.

9. The lifting device for duct installation according to claim 1, characterized in that: The frame base (1) is provided with a counterweight box; the surface of the lifting platform (5) is covered with anti-slip rubber pads; the four sides of the lifting platform (5) are reserved with railing insertion interfaces (17) for installing guardrails.

10. The lifting device for duct installation according to claim 1, characterized in that: The universal load-bearing wheel (2) is a universal wheel with braking function.

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