Portable heat-receiving surface tube panel assembly lifting frame device

Abstract

This application discloses a portable lifting frame device for thermal power plant heating surface tube panels, comprising a tube panel placement area, an anti-slip fixing device, a counterweight placement area, lifting lugs, and a rotating shaft corner connection device. The placement area is constructed from 80-120mm thick Q235B channel steel welded into a frame, with internal horizontal support beams and anti-slip protrusions. The anti-slip device uses 50×50mm to 100×100mm angle steel uprights and neoprene rubber cross-patterned anti-slip pads to limit the tube panels. The counterweight area is rotatably connected to the placement area via a rotating shaft, with a load-bearing steel plate at the bottom. The lifting lugs are made of thick steel plates with a triangular reinforcing structure and holes of 40-60mm in diameter. Modules are assembled using bolts or slots. During lifting, the device rotates to 80-90°, utilizing the counterweight to balance and prevent tube panel deformation, eliminating the need for high-altitude unhooking. This solves the problems of easy deformation and complex operation associated with traditional dual-machine lifting, offering advantages such as portability, modularity, and safety.

Description

Technical Field

[0001] This utility model relates to the field of hoisting technology for heating surface tube panels in thermal power plants, specifically to a portable lifting frame device for heating surface tube panel assemblies in thermal power plants. Background Technology

[0002] In the daily work of thermal power plant construction, the installation of boiler heating surface equipment, tube panel assembly, and hoisting operations are indispensable. These operations usually need to be carried out at heights, and the workpieces are prone to bending and deformation during the hoisting stage. Therefore, it is necessary to design an auxiliary hoisting device as a hoisting tool. This device can protect the workpiece equipment, especially the tube panel equipment, by causing the equipment to bend and deform.

[0003] Traditional construction methods for economizers involve a two-piece assembly. During hoisting, a dual-crane lifting system is used. The main crane is gradually raised while the auxiliary crane releases its hook. Then, a crane lifts the basket to a higher altitude to release the wire rope shackles, and finally, the main crane mechanically lifts the economizer into its designated position. This conventional hoisting method suffers from problems such as equipment deformation during lifting, instability in the hoisting process, and poor adaptability, limiting its flexibility in application within thermal power plants and impacting operational efficiency and safety. Utility Model Content

[0004] The present invention aims to provide a portable lifting device for the heating surface tube panel assembly of thermal power plants, so as to solve the problems of easy deformation of equipment, unstable lifting process, poor adaptability, and complex high-altitude untying operation in the traditional heating surface tube panel hoisting operation of thermal power plants, which affect the efficiency and safety of the operation.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a portable lifting device for thermal power plant heating surface tube panel assemblies, comprising:

[0006] The area for placing the assembled tube screen is a frame structure welded from channel steel. The channel steel is 80-120mm thick and made of Q235B or equivalent strength steel. Horizontal support beams are provided on the inner side of the frame to form a tube screen support surface. Anti-slip protrusions are welded at equal intervals on the support beams.

[0007] The anti-slip fixing device includes angle steel uprights that are vertically connected to both sides of the placement area of ​​the assembled tube screen. The angle steel is 50×50mm to 100×100mm in size. The top of the uprights is formed by a horizontal angle steel to create a limiting groove. An elastic anti-slip pad is provided in the groove.

[0008] The counterweight placement area is rotatably connected to the assembly tube screen placement area via detachable corner connectors. The counterweight placement area is made of channel steel welded into a grid frame, with a load-bearing steel plate laid at the bottom for placing sandbags or counterweight blocks.

[0009] Lifting lugs are symmetrically arranged on the top of the rear frame of the assembly tube panel placement area. They are made of steel plates with a thickness of 15-25mm, with reinforcing ribs extending from both sides of the steel plates. Lifting holes with a diameter of 40-60mm are opened in the middle of the lifting lugs.

[0010] The rotating shaft corner connection device includes two 20mm thick steel plates arranged parallel to each other. A coaxial hole with a diameter of 100-120mm is reserved in the middle of the steel plates. A steel shaft with a diameter of 80-120mm passes through the hole to form a rotating pair. Limiting retaining rings are provided at both ends of the steel shaft, so that the placement area and the counterweight placement area can rotate around the shaft.

[0011] The working principle of this utility model is as follows: During operation, the assembly tube screen placement area is constructed from a frame structure welded from channel steel. The channel steel is 80-120mm thick and made of Q235B or equivalent strength steel. Horizontal support beams on the inner side of the frame form the tube screen's support surface. Anti-slip ridges are welded at equal intervals on the support beams to prevent the tube screen from sliding. The anti-slip fixing device includes angle steel uprights vertically connected to both sides of the placement area. The angle steel specifications are 50×50mm to 100×100mm. A limiting groove is formed at the top of the uprights by a horizontal angle steel, and an elastic anti-slip pad is installed inside the groove to buffer impact and fix the tube screen. The counterweight placement area is rotatably connected to the placement area via detachable corner connectors. This area is constructed from a grid-like frame welded from channel steel, with a load-bearing steel plate at the bottom for placing sandbags or counterweights to balance the center of gravity. The rotating shaft corner connector includes two 20mm thick steel plates arranged parallel to each other. A coaxial hole is pre-drilled in the middle of the steel plates, through which a steel shaft passes, forming a rotating pair, allowing the placement area and the counterweight area to rotate around the axis. The lifting lugs are symmetrically positioned at the top of the frame at the rear end of the placement area. They are made of 15-25mm thick steel plates with reinforcing ribs extending from both sides. A lifting hole is located in the center of each lug. During hoisting, the main hoist lifts the placement area via the lugs, while the auxiliary hoist assists in lifting the counterweight area. The device rotates around its axis to 80-90°, balancing the counterweight's torque with the weight of the tube panel. After the auxiliary hoist releases its hook, the device remains stable thanks to the limit rings, eliminating the need for high-altitude unhooking and achieving stable support and deformation protection during the tube panel hoisting process.

[0012] The beneficial effects of this utility model are as follows: The device features a rotatable shaft, allowing the auxiliary lifting device to fit tightly against the pipe screen during hoisting, protecting the pipe screen from bending deformation caused by collisions. The force-bearing structure is rationally arranged, facilitating inspection and maintenance. Simultaneously, the ingenious design of the lifting lugs significantly reduces the difficulty of unhooking during dual-machine lifting, improving construction safety. The hoisting device itself has a simple structure, using channel steel connections, making it lightweight, sturdy, and durable. It also includes a fall protection device, ensuring safety, reliability, and practicality. Compared to conventional hoisting methods, it significantly improves the protection of finished products, enhances construction safety, and makes the construction site more standardized.

[0013] Furthermore, the rotation angle range of the pivot angle connecting device is 0-90°. This 0-90° range allows for precise control of the lifting frame to reach the optimal operating angle of 80-90° during hoisting, preventing excessive rotation from causing sudden stress changes and deformation of the tube screen. This angle range not only meets the requirements for transitioning the tube screen from a horizontal to a vertical hoisting position, but also prevents accidental rotation due to swaying during high-altitude operations through a limiting structure, improving operational safety, ensuring stable device posture during auxiliary hook release, and reducing the need for high-altitude unhooking operations.

[0014] Furthermore, the grid frame size of the counterweight placement area is adapted to the placement area, the bottom load-bearing steel plate is 10-20mm thick, and anti-tipping guardrails are provided at the edges. The grid frame size of the counterweight placement area is adapted to the placement area, which facilitates the even distribution of the counterweight at the center of gravity. The 10-20mm thick load-bearing steel plate can withstand a counterweight weight of 500-5000kg. The anti-tipping guardrails at the edges can effectively prevent the counterweight from falling during handling or hoisting, ensuring the overall stability of the device, avoiding tilting and deformation of the tube screen due to counterweight offset, and improving the balance and safety during hoisting.

[0015] Furthermore, the elastic anti-slip pad is made of neoprene rubber with a cross-shaped anti-slip texture on its surface. The high elasticity of neoprene rubber cushions the impact during hoisting, preventing direct hard contact between the tube panel and metal components, thus avoiding scratches or deformation. The cross-shaped anti-slip texture increases the coefficient of friction on the contact surface, effectively preventing tube panel slippage even in humid or vibrating environments. Simultaneously, the wear resistance of neoprene rubber extends the service life of the device and reduces maintenance costs.

[0016] Furthermore, the reinforcing ribs are welded to the top of the frame to form a triangular support structure, with a rated load of no less than 5000 kg for each lifting lug. The welding of the reinforcing ribs of the lifting lugs to the top of the frame to form a triangular support structure utilizes the stability principle of triangles to significantly enhance the tensile and shear strength of the lifting lugs, reducing stress concentration at the connection between the lifting lugs and the frame. The rated load of no less than 5000 kg for each lifting lug adapts to the lifting needs of pipe panel assemblies of different weights, ensuring that the lifting lugs are not easily deformed or broken during lifting, effectively reducing safety hazards and ensuring operational safety.

[0017] Furthermore, the modular assembly structure is used for the placement area of ​​the composite tube panel, the counterweight placement area, and the anti-slip fixing device. Each module is detachable and connected via bolts or slots. This modular structure allows for disassembly into independent components during transport, significantly reducing space requirements and handling difficulties. On-site assembly requires no welding; standardized interfaces enable rapid assembly, shortening construction preparation time and meeting the portability and efficiency requirements of high-altitude operations in thermal power plants. The modular design also facilitates component replacement and maintenance, allowing for flexible adjustment of module combinations based on actual working conditions, thus reducing later operating costs. Attached Figure Description

[0018] Figure 1 This is a front view of a portable lifting frame device for a thermal power plant heating surface tube panel assembly according to the present invention.

[0019] Figure 2 This is a top view of a portable lifting frame device for a thermal power plant heating surface tube panel assembly according to the present invention.

[0020] Figure 3 This is a side view of a portable lifting frame device for a thermal power plant heating surface tube panel assembly according to the present invention. Detailed Implementation

[0021] The following detailed description illustrates the specific implementation method:

[0022] The reference numerals in the accompanying drawings include: 1. Tube panel assembly equipment placement area; 2. Anti-slip fixing device; 3. Counterweight placement area; 4. Lifting lug; 5. Rotary shaft corner connection device.

[0023] The basic implementation examples are as follows: Figure 1-3The image shows a portable lifting frame device for thermal power plant heat exchanger tube panels, comprising: a tube panel placement area, which is a frame structure welded from 100mm thick Q235B channel steel, with horizontal support beams welded to the inner side of the frame to form a tube panel support surface, and anti-slip protrusions welded at equal intervals on the support beams; an anti-slip fixing device, including 50×50mm angle steel uprights welded vertically to both sides of the tube panel placement area, with limiting grooves formed by welding horizontal angle steel at the top of the uprights, and elastic anti-slip pads made of neoprene rubber with cross-shaped anti-slip texture embedded in the grooves; and a counterweight placement area, which is rotatably connected to the tube panel placement area via detachable corner connectors, and this area is a grid frame welded from 100mm channel steel, with a 10mm thick load-bearing steel plate welded to the bottom and anti-tipping guardrails welded to the edges for placement. Sandbags or counterweights are placed; lifting lugs, symmetrically welded to the top of the frame at the tail end of the assembly tube panel placement area, are made of 20mm thick steel plates. Reinforcing ribs extend from both sides of the steel plates and are welded to the top of the frame to form a triangular support structure. A 50mm diameter lifting hole is opened in the middle of the lifting lug, and the rated load of a single lifting lug is not less than 5000kg; the rotating shaft corner connection device includes two 20mm thick steel plates arranged parallel to each other. A 110mm diameter coaxial hole is reserved in the middle of the steel plates. A 100mm diameter steel shaft passes through the hole to form a rotating pair. Limiting rings are welded to both ends of the steel shaft, allowing the placement area and the counterweight placement area to rotate around the shaft within the range of 0-90°; the assembly tube panel placement area, the counterweight placement area, and the anti-slip fixing device adopt a modular assembly structure. Each module can be detachably connected by bolts and slot insertion.

[0024] The specific implementation process is as follows: First, the components are assembled: a frame is welded from 100mm thick Q235B channel steel as the placement area for the assembled tube screen. Horizontal support beams are welded inside the frame to form a support surface, and anti-slip protrusions are welded at equal intervals on the support beams. 50×50mm angle steel uprights are vertically welded to both sides of the placement area. A limiting groove is formed at the top of the uprights by welding horizontal angle steel, and an elastic anti-slip pad made of neoprene rubber with a cross-shaped anti-slip texture is embedded in the groove. The counterweight placement area is constructed from a grid frame welded from 100mm channel steel. A 10mm thick load-bearing steel plate is welded to the bottom, and anti-tipping guardrails are welded to the edges. It is rotatably connected to the placement area via detachable corner connectors. These connectors consist of two 20mm thick steel plates (with a pre-drilled 110mm diameter coaxial hole in the middle) inserted into a 100mm diameter steel shaft to form a rotating pair. Limiting retaining rings are welded to both ends of the steel shaft, allowing them to rotate around the shaft within a range of 0-90°. The lifting lugs are made of 20mm thick steel plates, symmetrically welded to the top of the frame at the rear of the placement area. Reinforcing ribs extend from both sides of the steel plates and are welded to the top of the frame to form a triangular support structure. A 50mm diameter lifting hole is opened in the center of each lug, and the rated load of a single lug is no less than 5000kg. Each module is assembled into a whole using bolt connections and slotted joints. Before hoisting, sandbags or counterweights are placed in the counterweight area according to the weight of the tube panel. The tube panel is then placed in the placement area and limited by anti-slip fixing devices. During hoisting, the main hoist wire rope passes through the lifting hole of the lug, and the auxiliary hoist hook connects to the counterweight area. The main hoist lifts the placement area, and the auxiliary hoist simultaneously lifts the counterweight area. When the device rotates around the axis to approximately 85°, the main hoist continues to rise, and the auxiliary hoist slowly releases the hook, using the gravity torque of the counterweight to balance the weight of the tube panel, preventing bending and deformation. No high-altitude suspended platform unhooking is required throughout the process. After hoisting, each module is disassembled and transported separately for future use.

[0025] The above descriptions are merely embodiments of this utility model, and common knowledge regarding specific structures and characteristics is not elaborated upon here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the structure of this utility model, and these should also be considered within the scope of protection of this utility model. These modifications will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application shall be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A portable lifting device for heating surface tube panel assemblies in thermal power plants, characterized in that, include: The area for placing the assembled tube screen is a frame structure welded from channel steel. The channel steel is 80-120mm thick and made of Q235B or equivalent strength steel. Horizontal support beams are provided on the inner side of the frame to form a tube screen support surface. Anti-slip protrusions are welded at equal intervals on the support beams. The anti-slip fixing device includes angle steel uprights that are vertically connected to both sides of the placement area of ​​the assembled tube screen. The angle steel is 50×50mm to 100×100mm in size. The top of the uprights is formed by a horizontal angle steel to create a limiting groove. An elastic anti-slip pad is provided in the groove. The counterweight placement area is rotatably connected to the assembly tube screen placement area via detachable corner connectors. The counterweight placement area is made of channel steel welded into a grid frame, with a load-bearing steel plate laid at the bottom for placing sandbags or counterweight blocks. Lifting lugs are symmetrically arranged on the top of the rear frame of the assembly tube panel placement area. They are made of steel plates with a thickness of 15-25mm, with reinforcing ribs extending from both sides of the steel plates. Lifting holes with a diameter of 40-60mm are opened in the middle of the lifting lugs. The rotating shaft corner connection device includes two 20mm thick steel plates arranged parallel to each other. A coaxial hole with a diameter of 100-120mm is reserved in the middle of the steel plates. A steel shaft with a diameter of 80-120mm passes through the hole to form a rotating pair. Limiting retaining rings are provided at both ends of the steel shaft, so that the placement area and the counterweight placement area can rotate around the shaft.

2. The portable lifting device for thermal power plant heating surface tube panel assembly according to claim 1, characterized in that: The rotation angle range of the rotating shaft corner connecting device is 0-90°.

3. The portable lifting device for thermal power plant heating surface tube panel assembly according to claim 2, characterized in that: The grid frame size of the counterweight placement area is adapted to the placement area, the bottom load-bearing steel plate is 10-20mm thick, and the edge is equipped with anti-tipping guardrails.

4. The portable lifting device for thermal power plant heating surface tube panel assembly according to claim 3, characterized in that: The elastic anti-slip mat is made of neoprene rubber and has a cross-shaped anti-slip texture on its surface.

5. A portable lifting device for thermal power plant heating surface tube panel assembly according to claim 4, characterized in that: The reinforcing ribs are welded to the top of the frame to form a triangular support structure, and the rated load of a single lifting lug is not less than 5000 kg.

6. A portable lifting device for thermal power plant heating surface tube panel assembly according to claim 5, characterized in that: The assembly tube screen placement area, counterweight placement area, and anti-slip fixing device adopt a modular assembly structure, and each module can be detachably connected by bolt connection or slot insertion.

Images