A cable net air membrane type temporary roof

Abstract

The present invention discloses a cable net air membrane type temporary roof, comprising a supporting ring beam (2), a cable net (3) and an inflatable membrane (4); the supporting ring beam (2) is fixed on the top of a steel containment (1), the supporting ring beam (2) is welded from a steel pipe or a steel section, and is used to anchor the inflatable membrane (4) and the end of the cable net (3); the cable net (3) is divided into an upper cable net (31) and a lower cable net (32), each of which is composed of a plurality of cables; the cable net (3) can be arranged cross-tensioned or radially tensioned; the inflatable membrane (4) is a double-layer membrane arranged between the upper cable net (31) and the lower cable net (32), and is inflated in the inflatable membrane (4) to present a flat "flying saucer" shape. The present invention realizes "0" interference in the hoisting of various items in a reactor building, and can respond quickly to weather changes; it can withstand strong typhoons and heavy rain and snow, and ensures safety and reliability during use.

Description

Technical Field

[0001] The invention belongs to the technical field of engineering building roof structures, and particularly relates to the technical field of wing-type roofs. Background Art

[0002] my country's nuclear power construction is mainly based on the third-generation nuclear power technology, and the main models include the AP / CAP series and Hualong One. Taking the AP / CAP series nuclear power plants as an example, modular design and construction technology are important features of the third-generation nuclear power technology, and "open-top" hoisting construction is a prerequisite for the application of modular technology. This construction method significantly improves construction efficiency and shortens the construction period. However, due to frequent rainfall in coastal areas, the probability of typhoons every year is very high. Temporary protection measures using temporary roof devices installed on the top of the steel containment of the reactor building can avoid the impact of wind and rain on the hoisted items. Among them, the diameter of the steel containment of the reactor building of the AP / CAP series nuclear power plant is about 40m, and the wall thickness is only about 50mm.

[0003] Existing temporary roof or top cover structures for reactor buildings all adopt a spatial grid structure with membrane materials laid on the surface, and adopt a dynamic opening and closing structure. Not only are they very complicated to use and have extremely high requirements on the power system, but they also need to solve the problem of deformation of the steel containment of the reactor building. In addition, they are expensive and are not conducive to popularization.

[0004] The cable net inflatable membrane structure has the characteristics of fast construction, light weight, and good economic benefits. Its working principle is to inflate and pressurize the existing closed membrane body so that the membrane body bulges to the designed curved surface, maintain the internal and external pressure difference to ensure the rigidity of the overall structure, and arrange a certain number of upper and lower chords on the upper and lower surfaces respectively to form a common force system with the membrane surface. By controlling the internal force distribution in the membrane surface and the cable net, the stress of the membrane structure can be effectively reduced, the rigidity of the membrane structure can be increased, the deformation can be limited, and greater wind loads, snow loads, and water loads can be resisted, so as to better maintain the initial design state. The cable net inflatable membrane is installed on the top of the steel containment of the reactor building as a temporary roof device. It can not only significantly reduce the impact on the deformation of the steel containment of the reactor building, but also realize rapid hoisting and disassembly, thereby quickly responding to weather changes.

[0005] The cable net air film type temporary roof device disclosed in the present invention not only has a unique and novel structural design, but also has undergone innovative optimization in many aspects, including the realization of one-time rapid lifting; it can be reused between different units and CV multi-rings, which can avoid the problem of repeated procurement between multiple units and significantly reduce economic costs; a large number of grid steel structures are eliminated, which can significantly reduce the impact of the deformation of the containment due to the superposition of its own weight and other loads; and it works together with the upper and lower chord cable nets to resist the impact of strong typhoons and heavy rainfall. Summary of the invention

[0006] The cable net air membrane type temporary roof device of the present invention uses the upper cable net, the lower cable net and the inflatable membrane structure as the main structure, and is installed on the steel containment shell through steel structure support, realizing one-time rapid lifting and can be repeatedly used between different units and CV multi-rings. It is committed to solving the problems of complex design of existing temporary roofs, extremely high requirements on the power system, easy deformation of the containment shell, and high cost.

[0007] In order to achieve the above purpose, the present invention adopts the following technical scheme: a cable net air membrane type temporary roof, comprising a support ring beam (2), a cable net (3) and an inflatable membrane (4); the support ring beam (2) is fixed to the top of a steel containment shell (1), and the support ring beam (2) is welded from a steel pipe or a steel section and is used to anchor the inflatable membrane (4) and the end of the cable net (3);

[0008] The cable net (3) is divided into an upper cable net (31) and a lower cable net (32), each of which is composed of a plurality of cables; the cable net (3) can be arranged in a cross-tensioned manner or in a radially tensioned manner;

[0009] The inflatable membrane (4) is a double-layer membrane arranged between the upper cable net (31) and the lower cable net (32). When inflated inside the inflatable membrane (4), it presents a flat "flying saucer" shape.

[0010] Preferably, when the cable net (3) is arranged in a cross-tensioned manner, both ends of the cables are anchored to the supporting ring beam (2).

[0011] Preferably, when the cable net (3) is arranged in radial tension, one end of the cable is anchored to the supporting ring beam (2), and the other end is connected to a steel ring or annular cable (33) arranged in the center.

[0012] Preferably, a plurality of rope sleeves are respectively arranged on the surface of the upper membrane and the lower membrane of the inflatable membrane (4), and the cables of the cable net (3) pass through the corresponding rope sleeves respectively, so as to form an overall cable net inflatable membrane force bearing system.

[0013] Preferably, at least one inflation port is arranged around the inflatable membrane (4), and an inflation device delivers air to a specified air pressure into the inflatable membrane (4) through the inflation port.

[0014] The present invention has the following advantages over the prior art:

[0015] The cable-net air-membrane temporary roof device can be installed and disassembled as a whole, and completely realizes "0" interference in the lifting of various items in the reactor building.

[0016] The cable-net air-film temporary roof device can be directly "covered" on the steel containment shell. It can be hoisted as a whole by a large crane or a gantry crane and can respond quickly to weather changes.

[0017] The cable-net air-film temporary roof device can withstand strong typhoons and heavy rain and snow, ensuring safety and reliability during use. It can also be reused between different units and CV multi-rings, significantly improving economic efficiency.

[0018] The cable net air membrane type temporary roof device disclosed in the present invention can meet the protection requirements for hoisted items during the construction and installation of reactor buildings of third-generation nuclear power plants represented by the AP / CAP series. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a general schematic diagram of Example 1;

[0020] Figure 2 This is a front view of the cable net and inflatable membrane structure of Example 1;

[0021] Figure 3 Schematic diagram of the supporting ring beam;

[0022] Figure 4 This is a general schematic diagram of Example 2;

[0023] Figure 5 It is a top view of Example 2;

[0024] In the figure, 1. steel containment shell, 2. supporting ring beam, 3. cable net, 4. inflatable membrane, 31. upper cable net, 32. lower cable net, 33. annular cable. DETAILED DESCRIPTION

[0025] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0026] The cable net inflatable temporary roof device of the present invention is applied to the top of the steel containment of the reactor building of the AP / CAP series third-generation nuclear power plant, and can meet the protection requirements for hoisted items during the construction of the reactor building. Through overall installation and disassembly, the hoisting of various items in the reactor building is completely achieved with "0" interference; it realizes the use mode of directly "covering" the steel containment, and the overall hoisting is carried out by a large crane or gantry crane, which can quickly respond to weather changes; it can withstand strong typhoons and heavy rain and snow, ensuring safety and reliability during use, and can be repeatedly used between different units and CV multi-rings, significantly improving economic efficiency. Specific embodiment 1:

[0028] like Figures 1 to 4The cable net inflatable temporary roof device shown should at least include a supporting ring beam, a cable net and an inflatable membrane.

[0029] The supporting ring beam 2 is a steel structure, used for anchoring the ends of the inflatable membrane 4 and the cable net 3, and supported on the top of the steel containment vessel 1 of the reactor building.

[0030] The cable net 3 is divided into an upper cable net 31 and a lower cable net 32, each of which is composed of a plurality of cables. The cable net is arranged in a cross-tensioning manner, and both ends of the cables are anchored to the supporting ring beam.

[0031] The inflatable membrane 4 is a double-layer membrane arranged between the upper cable net 31 and the lower cable net 32. When air is inflated between the double-layer membranes and a certain air pressure is reached, the inflatable membrane presents a flat "flying saucer" shape.

[0032] The inflatable membrane 4 is anchored to the supporting ring beam on all sides.

[0033] A plurality of cable sleeves are respectively arranged on the surface of the upper layer and the lower layer of the inflatable membrane 4. When the inflatable membrane is in a low internal pressure state, the cables pass through the corresponding cable sleeves respectively to form an integral cable net inflatable membrane force bearing system.

[0034] An inflation port is arranged around the inflatable membrane 4, and the inflation device delivers air to the space between the double-layer membranes to a specified pressure through the inflation port, and keeps the pressure stable within the required range.

[0035] The specific manufacturing method of the cable net air film type temporary roof device is as follows:

[0036] 1. Complete the multi-condition design of the membrane structure, cut and manufacture the inflatable membrane structure in the factory, and set multiple rope sleeves on the surface of the upper membrane and the lower membrane respectively, and then pack and transport it to the nuclear power site for assembly;

[0037] 2. Complete the multi-condition design of the supporting ring beam, process and cut the required steel and steel sections in the factory, and transport them to the designated open space on site for welding and assembly;

[0038] 3. Under the low internal pressure state of the membrane structure, assemble the supporting ring beam, membrane structure and cable net, inflate the membrane structure to a specific air pressure, and maintain the air pressure within a specific range;

[0039] 4. The cable net air film type temporary roof device of the present invention can quickly respond to weather changes. Before the arrival of rainy and snowy weather, the assembled temporary roof device can be hoisted to the top of the steel containment of the reactor building by a large crane or a gantry crane, and fixed to the steel containment by supports, cables or other measures, so as to play a role in preventing wind, rain and snow. After the rainy and snowy weather ends, the fixing measures are released, and the temporary roof device is hoisted to a designated open space by a large crane or a gantry crane for storage until the next use. Specific embodiment 2:

[0041] like Figure 2 As shown, the structure is similar to that of embodiment 1, except that:

[0042] The cable net 3 is divided into an upper cable net 31 and a lower cable net 32, each of which is composed of a plurality of cables, and the cable net is tensioned in the radial direction.

[0043] When the cable net 3 is tensioned in the radial direction, one end of the cable is anchored to the supporting ring beam, and the other end is connected to a steel ring or annular cable 33 arranged in the center.

[0044] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these changes and variations. The above embodiments or implementations are merely illustrative of the present invention, and the present invention may also be implemented in other specific ways or other specific forms without departing from the gist or essential features of the present invention. Therefore, the described implementations should be considered illustrative rather than restrictive in any respect. The scope of the present invention should be described by the appended claims, and any changes equivalent to the intent and scope of the claims should also be included within the scope of the present invention.

Claims

1. A cable net air film type temporary roof, characterized in that: It comprises a supporting ring beam (2), a cable net (3) and an inflatable membrane (4); the supporting ring beam (2) is fixed to the top of a steel containment shell (1); the supporting ring beam (2) is welded from a steel pipe or a steel section and is used to anchor the ends of the inflatable membrane (4) and the cable net (3); The cable net (3) is divided into an upper cable net (31) and a lower cable net (32), each of which is composed of a plurality of cables; the cable net (3) can be arranged in a cross-tensioned manner or in a radially tensioned manner; The inflatable membrane (4) is a double-layer membrane arranged between the upper cable net (31) and the lower cable net (32). The inflatable membrane (4) is inflated to present a flat "flying saucer" shape; A plurality of cable sleeves are respectively arranged on the surface of the upper layer and the lower layer of the inflatable membrane (4), and the cables of the cable net (3) pass through the corresponding cable sleeves respectively to form an overall cable net inflatable membrane force bearing system; When the cable net (3) is arranged in a cross-tensioned manner, both ends of the cables are anchored to the supporting ring beam (2).

2. The cable net air film type temporary roof as claimed in claim 1, characterized in that: When the cable net (3) is tensioned in the radial direction, one end of the cable is anchored to the supporting ring beam (2), and the other end is connected to a steel ring or annular cable (33) arranged in the center.

3. The cable net air film type temporary roof as claimed in claim 1, characterized in that: At least one inflation port is arranged around the inflatable membrane (4), and an inflation device delivers air to a specified air pressure into the inflatable membrane (4) through the inflation port.

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