Top hanging type construction method for replacing large equipment in steel structure factory building

Abstract

The invention relates to a top hanging type construction method for replacing large-scale equipment in a steel structure factory building, and solves the problems that the transportation difficulty of equipment entering and exiting the factory building is large when some large-scale equipment in the original steel structure factory building is replaced, and non-stop operation in the equipment replacement process is difficult to realize. The method comprises the following steps that S1, a roof dismantling area is delimited; s2, a protective shed is installed above the roof dismantling area, a hole used for hoisting equipment is reserved in the middle of the protective shed, and the protective shed is wholly covered with a film; s3, the roof of the dismantling area is dismantled; s4, a covering film and a single-layer rod piece at the hole opening of the protective shed are dismantled, the hole opening area is cleared, and old equipment is hoisted out of the hole opening through a crane; new equipment is hoisted from the hole, and the hole of the protective shed is covered with a film again after hoisting is completed; s5, the roof in the dismantling area is restored and installed; and S6, the protective shed above the roof is dismantled. According to the method, large equipment in a plant is replaced under the condition that the positions of other equipment are not influenced in a manner of erecting a shed to disassemble and assemble the steel structure roof structure.

Description

Technical Field

[0001] The invention belongs to the field of steel structure buildings and relates to a disassembly, assembly and maintenance method of a steel structure plant, in particular to a top-hanging construction method for replacing large equipment in a steel structure plant. Background Art

[0002] Steel structure buildings are common building structures in industrial buildings. Many large warehouses, production bases, and power plants are built with steel structures. Steel structure buildings have large internal space spans, good space utilization, and can be quickly built, disassembled, and maintained on site in a flexible manner. Some equipment in steel structure buildings is large in size, high in cost, high in installation and commissioning requirements, and high in shutdown and replacement costs. After the initial installation of the equipment, the equipment is not easily disassembled and replaced. Taking the power plant of a nuclear power plant as an example, the generator sets arranged regularly in the steel structure plant are large in size, high in cost, and high in installation requirements. They are not suitable for disassembly and movement, and each generator set needs to run continuously and cannot be easily shut down. When one or several of the generator sets need to be disassembled, assembled, or replaced, the normal operation of the remaining normal units needs to be guaranteed. The large generator sets located inside the plant cannot be transported across other units near the door. If they need to be shut down for replacement, the engineering workload and the shutdown cost of the generator sets are huge. Summary of the invention

[0003] The purpose of the present invention is to solve the problem that when some large equipment is replaced in a steel structure factory, it is difficult to transport the equipment in and out of the factory, and it is difficult to operate the equipment without stopping the machine during the replacement process. A top-hanging construction method for replacing large equipment in a steel structure factory is proposed. The roof of the steel structure factory is dismantled by the top-hanging construction method. After the dismantling and replacement of the equipment, the roof of the steel structure factory is reinstalled, and wind and water are prevented during the disassembly and assembly of the roof to ensure the continuous operation of other equipment units without stopping.

[0004] The technical solution adopted by the present invention to solve the technical problem is: a top-hanging construction method for replacing large equipment in a steel structure factory building, comprising the following steps: S1, determine the roof removal location and delineate the roof removal area; S2, install a protective shed above the roof demolition area. The protective shed completely covers the demolition area. A hole is left in the middle of the protective shed for hoisting equipment. The hole of the protective shed is supported by a single-layer top rod. The protective shed is supported by steel trusses at both ends of the hole, and multi-layer rods are used between the steel trusses. The outer side of the protective shed is covered with film to prevent wind and rain. S3, dismantle the roof of the demolition area; S4, remove the film and single-layer rods at the opening of the protective shed, clear the opening area, park the crane outside the factory building, extend the boom above the opening, use the sling to lift the old equipment out of the opening; lift the new equipment in from the opening, and reinstall the single-layer rods at the opening of the protective shed after the lifting is completed; S5, restore and install the roof of the demolished area; S6, remove the protective shed above the roof.

[0005] This device is used to replace large equipment in existing large steel structure building plants. The roof of the plant is composed of steel trusses, purlins, and roof panels from bottom to top. It is necessary to partially dismantle the roof panels, purlins, and steel trusses to form a hoisting hole, and then hoist and replace the large equipment from the hole. During the disassembly and assembly process, other equipment in the plant does not stop. This device uses a protective shed set up above the roof removal area to prevent wind and rain. Only the covering film and single-layer rods at the hole are temporarily dismantled during the hoisting process. By choosing clear weather, large equipment in the plant can be replaced without affecting the location of other equipment, which can minimize interference with the normal operation of other equipment in the plant. It is especially suitable for occasions such as nuclear power plants where equipment is expensive, debugging requirements are high, and unit shutdown is not allowed under normal circumstances.

[0006] Preferably, S2 includes the following steps: S2.1, at the upper ends of the columns at both ends of the roof removal area, extend outwards towards the outside of the factory building to install supporting corbels; S2.2, install the steel roof trusses at the ends on the supporting brackets at both ends; S2.3, install connecting trusses between the two ends of the steel roof trusses; S2.4, the middle of the shelter is an opening, and several steel trusses are installed at equal intervals at both ends of the opening. For the steel trusses at the same end of the opening, upper chords, lower chords, and cross-arranged support rods are used to connect and support multiple layers of rods. For the opening position, only a single layer of rods is installed on the top surface for support, and the two ends of the rods at the opening position are spanned between the two steel trusses closest to the two ends of the opening; S2.5, cover the outside of the protective shed with film. When covering, cover the two ends of the opening first, and then cover the opening position. The opening position is covered with film independently.

[0007] Preferably, the steel roof frame of the protective shed is a gable roof frame that is high in the middle and low at both ends.

[0008] As a preferred embodiment, in S3, the roof of the steel structure factory building is composed of steel trusses, purlins, and roof panels from bottom to top. Before dismantling the roof, the rods of the steel trusses on both sides of the roof dismantling area are strengthened; the dismantling order is roof panels, purlins, and steel trusses.

[0009] Preferably, in S3, the order of removing the roof panel, purlin and roof panel is from high to bottom.

[0010] Preferably, in step S5, the order of installing the roof in the demolished area is opposite to the order of disassembling the roof in step S3.

[0011] Preferably, in step S6, the order of removing the protective shed is opposite to the order of installing the protective shed in step S2.

[0012] The present invention sets up a protective shed above the roof demolition area and then disassembles and assembles the roof structure in the protective shed. This allows large equipment in the factory to be replaced without affecting the positions of other equipment. This can minimize interference with the normal operation of other equipment in the factory. The present invention is particularly suitable for situations such as nuclear power plants where equipment is expensive, debugging requirements are high, and unit shutdown is not allowed under normal circumstances. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The present invention will be further described below in conjunction with the accompanying drawings.

[0014] Figure 1 It is a schematic diagram of the installation structure of the protective shed corbel of the present invention.

[0015] Figure 2 It is a schematic diagram of the installation structure of the steel roof truss at the end of the protective shed of the present invention.

[0016] Figure 3 It is a schematic diagram of the installation structure of the protective shed connecting trusses of the present invention.

[0017] Figure 4 It is a schematic diagram of the installation structure of all steel roof frames of the protective shed of the present invention.

[0018] Figure 5 It is a schematic diagram of the steel roof truss support structure at both ends of the protective shed opening of the present invention.

[0019] Figure 6 It is a schematic diagram of the steel roof truss support structure at the opening position of the protective shed of the present invention.

[0020] Figure 7 It is a schematic diagram of the membrane covering structure at both ends of the protective shed opening of the present invention.

[0021] Figure 8 It is a schematic diagram of the entire film covering structure of the protection shed of the present invention.

[0022] Fig. 9 It is a schematic diagram of the roof layered structure of the present invention.

[0023] In the figure: 1. Steel structure factory building, 2. Roof, 21. Roof panel, 22. Purlin, 23. Steel truss, 3. Supporting corbel, 4. Steel roof truss, 5. Connecting truss, 6. Opening, 7. Multi-layer rod, 8. Single-layer rod, 9. Film. DETAILED DESCRIPTION

[0024] The present invention will be further described below through specific embodiments in conjunction with the accompanying drawings.

[0025] Embodiment: A top-hanging construction method for replacing large equipment in a steel structure factory building, the construction sequence is as follows: Figure 1-2 As shown, this method is used for the lifting construction of large equipment replacement inside a large-span steel structure factory building 1. During the construction process, a part of the roof 2 is removed for top lifting. Fig. 9 As shown, from top to bottom are the roof panel 21, the purlin 22, and the steel truss 23, and wind caps are evenly arranged above the roof panel.

[0026] This construction method includes the following steps: S1, determine the removal position of roof 2 and define the roof removal area; S2, a protective shed is installed above the roof demolition area, the protective shed completely covers the demolition area, a hole 6 is left in the middle of the protective shed for hoisting equipment, the hole position of the protective shed is supported by a top single-layer rod 8, the protective shed is supported by steel trusses at both ends of the hole position, and multi-layer rods 7 are used between the steel trusses; the outer side of the protective shed is covered with a film 9 to achieve wind and rain protection; S2.1, at the upper ends of the columns at both ends of the roof removal area, extend outwards towards the outside of the factory building and install supporting brackets 3; Figure 1 As shown; S2.2, respectively install the steel roof trusses 4 at the ends on the supporting brackets at both ends, the steel roof trusses of the protective shed are gable roof trusses with a high middle and low ends; Figure 2 As shown; S2.3, install connecting trusses 5 between the two ends of the steel roof trusses; Figure 3 As shown; S2.4, the middle of the protective shed is an opening 6, and several steel roof trusses 4 are installed at equal intervals at both ends of the opening, such as Figure 4 For each steel truss at the same end of the opening, the upper chord, the lower chord, and the cross-arranged support rods are used to connect and support the multi-layer rods 7, such as Figure 5 As shown; for the hole position, only a single layer of rods 8 are installed on the top surface for support, such as Figure 6 As shown; the two ends of the rod at the opening position are spanned between the two steel roof trusses closest to the two ends of the opening; S2.5, cover the outside of the protective shed with film. When covering, cover the two ends of the hole with film first. Figure 7 As shown; then cover the hole position, as shown Figure 8 As shown; the hole position is covered independently.

[0027] S3, dismantle the roof of the demolition area; the roof of the steel structure factory building is composed of steel trusses, purlins, and roof panels from bottom to top. Before dismantling the roof, the rods of the steel trusses on both sides of the roof demolition area are reinforced; the rod reinforcement method can be to clamp a layer of reinforcing rods on the outer wall of the original rods, and then fix them by welding or clamping. The demolition order is roof panels 21, purlins 22, and steel trusses 23; S4, remove the film and single-layer rods at the opening of the protective shed, clear the opening area, park the crane outside the factory building, extend the boom above the opening, use the sling to lift the old equipment out of the opening; lift the new equipment in from the opening, and reinstall the single-layer rods at the opening of the protective shed after the lifting is completed; S5, restore and install the roof of the demolished area; the order of installing the roof of the demolished area is opposite to the order of roof disassembly in step S3, that is, the steel trusses 23, purlins 22, and roof panels 21 are installed in sequence; S6, dismantle the protective shed on the roof. The order of dismantling the protective shed is opposite to the order of installing the protective shed in step S2, that is, Figure 8 to Figure 1 order of removal.

Claims

1. A top-hanging construction method for replacing large equipment in a steel structure factory building, characterized in that: The following steps are involved: S1, determine the roof removal location and delineate the roof removal area; S2, install a protective shed above the roof demolition area. The protective shed completely covers the demolition area. A hole is left in the middle of the protective shed for hoisting equipment. The hole of the protective shed is supported by a single-layer top rod. The protective shed is supported by steel trusses at both ends of the hole, and multi-layer rods are used between the steel trusses. The outer side of the protective shed is covered with film to prevent wind and rain. S3, dismantle the roof of the demolition area; S4, remove the film and single-layer rods at the opening of the protective shed, clear the opening area, park the crane outside the factory building, extend the boom above the opening, use the sling to lift the old equipment out of the opening; lift the new equipment in from the opening, and reinstall the single-layer rods at the opening of the protective shed after the lifting is completed; S5, restore and install the roof of the demolished area; S6, remove the protective shed above the roof.

2. A top-hanging construction method for replacing large equipment in a steel structure factory building according to claim 1, characterized in that: S2 includes the following steps: S2.1, at the upper ends of the columns at both ends of the roof removal area, extend outwards towards the outside of the factory building to install supporting corbels; S2.2, install the steel roof trusses at the ends on the supporting brackets at both ends; S2.3, install connecting trusses between the two ends of the steel roof trusses; S2.4, the middle of the shelter is an opening, and several steel trusses are installed at equal intervals at both ends of the opening. For the steel trusses at the same end of the opening, the upper chord, lower chord, and cross-arranged support rods are used to connect and support multiple layers of rods. For the opening position, only a single layer of rods is installed on the top surface for support, and the two ends of the rods at the opening position are spanned between the two steel trusses closest to the two ends of the opening; S2.5, cover the outside of the protective shed with film. When covering, cover the two ends of the opening first, and then cover the opening position. The opening position is covered with film independently.

3. A top-hanging construction method for replacing large equipment in a steel structure factory building according to claim 1 or 2, characterized in that: The steel roof frame of the protective shed is a gable roof frame that is high in the middle and low at both ends.

4. The top-hanging construction method for replacing large equipment in a steel structure factory building according to claim 1 is characterized in that: In S3, the roof of the steel structure factory building is composed of steel trusses, purlins, and roof panels from bottom to top. Before dismantling the roof, the rods of the steel trusses on both sides of the roof dismantling area are strengthened; the dismantling order is roof panels, purlins, and steel trusses.

5. A top-hanging construction method for replacing large equipment in a steel structure factory building according to claim 4, characterized in that: In S3, the order of removing the roof panel, purlin and roof panel is from high to bottom.

6. A top-hanging construction method for replacing large equipment in a steel structure factory building according to claim 1, 4 or 5, characterized in that: In step S5, the order of roof installation in the demolition area is opposite to the order of roof removal in step S3.

7. A top-hanging construction method for replacing large equipment in a steel structure factory building according to claim 1 or 2, characterized in that: In step S6, the order of removing the protective shed is opposite to the order of installing the protective shed in step S2.

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