Steel structure hyperbolic cooling tower with double-layer and one-way straight-line diagonal rod system

Abstract

The application discloses a double-layer single-direction straight diagonal rod system steel structure hyperbolic cooling tower, which comprises an inner-layer net shell, an outer-layer net shell and a connecting truss; wherein the inner-layer net shell is in a double-curved parabolic surface shape and is composed of quadrilateral grids formed by inner straight diagonal rods and inner ring rods; the outer-layer net shell is also in a double-curved parabolic surface shape and is composed of quadrilateral grids formed by outer straight diagonal rods and outer ring rods; the inner-layer net shell and the outer-layer net shell are spaced apart by a certain distance, and are tightly combined together through the connecting truss to form an effective space stress system. The double-layer single-direction straight diagonal rod system steel structure cooling tower provided by the application has simple node structure, low welding quantity, small construction difficulty and relatively low overall cost, and is convenient to popularize and apply.

Description

Technical Field

[0001] This invention relates to the field of design of large cooling tower structures, and in particular to a hyperbolic cooling tower with a double-layer unidirectional straight-lined diagonal brace system. Background Technology

[0002] A cooling tower is a device used to cool water vapor into water at a lower temperature and discharge the system's waste heat into the atmosphere. Cooling towers come in various structures, the most common being natural draft wet cooling towers and forced draft wet cooling towers. Natural draft wet cooling towers typically employ a hyperbolic structure and are widely used in industrial applications, such as oil refineries, chemical plants, and power plants.

[0003] Hyperbolic cooling towers are not only aesthetically pleasing but also effectively utilize natural air convection, making their structural form superior to that of conical cooling towers. However, traditional hyperbolic cooling towers typically employ reinforced concrete thin-shell structures, which are heavy, have poor seismic resistance, and require a long construction period. In contrast, steel structures offer advantages such as lighter weight and faster installation.

[0004] Currently, there are two main types of hyperbolic cooling towers on the market. One type uses a single-layer spatial grid shell, which has relatively simple node construction and less welding. However, due to its single-layer structure, the structure itself cannot form a construction platform during construction, often requiring an overall lifting construction method, which is not only more difficult but also riskier. The other type uses a series of modular double-layer truss units to fit the hyperbolic shape of the cooling tower and form an overall double-layer spatial grid shell structure. It has better spatial stability, and the cross-section of the members can be controlled to be smaller, resulting in more economical steel consumption compared to a single-layer grid shell. However, due to the large number of members, the amount of welding on-site is very large, and the nodes are relatively complex.

[0005] The information disclosed in this background section is intended only to enhance the understanding of the general background of this application and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Summary of the Invention

[0006] The purpose of this invention is to provide a steel structure hyperbolic cooling tower with a double-layer unidirectional straight-lined diagonal bar system. This cooling tower has simple node construction, low welding volume, low construction difficulty, and relatively low overall cost.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A hyperbolic cooling tower with a double-layer unidirectional straight-lined diagonal bracing system, comprising: an inner reticulated shell, an outer reticulated shell, and connecting trusses; wherein,

[0009] The outer mesh shell is in the shape of a hyperbolic parabola. The parabola has two sets of straight generatrices with different inclination directions. One set is extracted as the outer ruled diagonal bar. The intersection of the two sets of straight generatrices is used as the layering point of the cooling tower structure. The layering points of the same layer are connected in sequence to form the outer ring bar. The outer ruled diagonal bar and the outer ring bar together form the outer mesh shell of the quadrilateral grid.

[0010] The inner mesh shell is also in the shape of a hyperbolic parabola. This parabola has two sets of straight generatrices with different inclination directions. One set is extracted as the inner ruled diagonal bar. The intersection of the two sets of straight generatrices is used as the layering point of the cooling tower structure. The layering points of the same layer are connected in sequence to form the inner ring bar. The inner ruled diagonal bar and the inner ring bar together form the inner mesh shell of the quadrilateral grid.

[0011] The inclination direction of the inner straight-lined diagonal bar is opposite to the inclination direction of the outer straight-lined diagonal bar;

[0012] The inner and outer reticulated shells are spaced a certain distance apart and are tightly connected together by the connecting truss to form an effective spatial force-bearing system.

[0013] Furthermore, tower body skin and purlins are fixed on the outer or inner mesh shell.

[0014] Furthermore, several reinforcing ring trusses are installed at different heights of the cooling tower.

[0015] Furthermore, a widening platform reinforced ring truss is formed on the lower part of the cooling tower based on the widening platform.

[0016] By adopting the above technical solution, the present invention has the following beneficial effects:

[0017] (1) Extract the straight generatrix of the hyperbola as the main load-bearing member of the structure. The node construction is simple and the amount of welding is low.

[0018] (2) The connecting truss can serve as a construction platform, providing a safe working surface for tower construction and greatly reducing the difficulty of construction. Attached Figure Description

[0019] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0020] Figure 1 This is an elevation view of the hyperbolic cooling tower with steel structure of the present invention;

[0021] Figure 2This is a three-dimensional isometric view of the hyperbolic cooling tower with steel structure of the present invention;

[0022] Figure 3 This is a three-dimensional isometric view of the outer reticulated shell of the hyperbolic steel cooling tower of the present invention;

[0023] Figure 4 This is a three-dimensional isometric view of the inner mesh shell of the hyperbolic steel cooling tower of the present invention;

[0024] Figure 5 This is a partial structural schematic diagram of the connecting truss of the hyperbolic cooling tower of the present invention;

[0025] Figure 6 This is a three-dimensional example of the connection between the steel structure hyperbolic cooling tower of the present invention and the inner and outer straight-lined diagonal braces;

[0026] Figure 7 This is a three-dimensional example of the reinforced ring truss of the widened platform of the hyperbolic cooling tower of the present invention;

[0027] Figure 8 This is a three-dimensional example of the reinforcing ring truss of the hyperbolic cooling tower of the present invention.

[0028] In the attached diagram, 1 is the outer straight-lined diagonal member, 2 is the inner straight-lined diagonal member, 3 is the straight web member of the connecting truss, 4 is the diagonal web member of the connecting truss, 5 is the inner ring member, 6 is the outer ring member, 7 is the reinforcing ring truss, 8 is the reinforcing ring truss of the widened platform, 9 is the inner reticulated shell, 10 is the outer reticulated shell, and 11 is the connecting truss. Detailed Implementation

[0029] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0031] Combination Figures 1-8 As shown, this embodiment provides a hyperbolic cooling tower with a double-layer unidirectional straight-lined diagonal brace system. The cooling tower includes: an inner mesh shell 9, an outer mesh shell 10, and a connecting truss 11; wherein,

[0032] The outer mesh shell 10 is in the shape of a hyperbolic parabola. The parabola has two sets of straight generatrices with different inclination directions. One set is extracted as the outer straight-ruled diagonal bar 1. The intersection of the two sets of straight generatrices is used as the layering point of the cooling tower structure. The layering points of the same layer are connected in sequence to form the outer ring bar 6. The outer straight-ruled diagonal bar 1 and the outer ring bar 6 together form the outer mesh shell of the quadrilateral grid.

[0033] The inner mesh shell 9 is also in the shape of a hyperbolic parabola. The parabola has two sets of straight generatrices with different inclination directions. One set is extracted as the inner straight-lined diagonal bar 2. The intersection of the two sets of straight generatrices is used as the layering point of the cooling tower structure. The layering points of the same layer are connected in sequence to form the inner ring bar 5. The inner straight-lined diagonal bar 2 and the inner ring bar 5 together form the inner mesh shell of the quadrilateral grid.

[0034] The inclination direction of the inner straight-lined diagonal bar 9 is opposite to the inclination direction of the outer straight-lined diagonal bar 10.

[0035] In this embodiment, the connecting truss 11 is composed of straight web members 3 and diagonal web members 4 connecting the inner reticulated shell 9 and the outer reticulated shell 10. The connecting truss 11 not only tightly connects the inner and outer reticulated shells to form an effective spatial force-bearing system, but also serves as a construction platform, providing a safe working surface for cooling tower construction. Furthermore, the specific configuration of the connecting truss 11 can be determined according to actual needs and is not limited to the configuration of the straight web members 3 and diagonal web members 4.

[0036] Furthermore, tower body skin and purlins are fixed on the outer mesh shell 10 or the inner mesh shell 9.

[0037] Based on the overall stability analysis of the cooling tower, this example further incorporates multiple reinforcing ring trusses 7 along the height of the cooling tower to enhance the overall stability of the tower body.

[0038] In this example, the specific configuration of the reinforcing ring truss 7 is not limited, and can be determined according to actual needs.

[0039] This example incorporates a widening platform, with a ring truss 8 arranged at the bottom of the tower, further enhancing the overall stability of the tower.

[0040] In this example, the specific configuration of the extended platform ring truss 8 is not limited, and can be determined according to actual needs.

[0041] In this example, both the inner straight-lined diagonal bar 2 and the outer straight-lined diagonal bar 1 are extracted from the straight generatrix of the hyperbolic paraboloid. Therefore, there are no inflection points within the entire height range of the cooling tower. Based on this characteristic, round steel pipes are preferred for the inner straight-lined diagonal bar 2 and the outer straight-lined diagonal bar 1 to facilitate node connection.

[0042] Meanwhile, since the number of members at the node is relatively small, and the cross-sectional dimensions of the inner straight-lined diagonal member 2 and the outer straight-lined diagonal member 1 are significantly larger than those of other members, the node meets the conditions for intersecting welding, and the intersecting welding method is preferred. Depending on actual needs, the node connection can also be changed to a welded ball type.

[0043] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A hyperbolic cooling tower of double-layer unidirectional straight-line diagonal strut system steel structure, characterized in that, The cooling tower comprises an inner-layer net shell, an outer-layer net shell and a connecting truss, wherein The outer-layer net shell is in the shape of a hyperbolic paraboloid, and the paraboloid has two groups of straight generatrices with different inclination directions, one group of the straight generatrices is extracted as outer straight slanting rods, the intersection points of the two groups of straight generatrices are taken as layering points of the cooling tower structure, and the outer ring rods are formed by connecting the layering points of the same layer in sequence; The inner-layer net shell is also in the shape of a hyperbolic paraboloid, and the paraboloid has two groups of straight generatrices with different inclination directions, one group of the straight generatrices is extracted as inner straight slanting rods, the intersection points of the two groups of straight generatrices are taken as layering points of the cooling tower structure, and the inner ring rods are formed by connecting the layering points of the same layer in sequence; The inclination direction of the inner straight slanting rods is opposite to that of the outer straight slanting rods; The inner-layer net shell and the outer-layer net shell are spaced apart by a certain distance, and are tightly combined together by the connecting truss to form an effective spatial force system.

2. The hyperbolic cooling tower of double-layered single-way straight-line diagonal strut system steel structure according to claim 1, characterized in that, A tower body skin and purlin are fixed on the outer-layer net shell or the inner-layer net shell.

3. The hyperbolic cooling tower of double-layered mono-directional straight-line diagonal strut system steel structure as claimed in claim 1, wherein, A plurality of reinforcing ring trusses are arranged at different heights of the cooling tower.

4. The hyperbolic cooling tower of double-layered mono-directional straight-line diagonal strut system steel structure as claimed in claim 1, wherein, A widened platform reinforcing ring truss is formed based on a widened platform at the lower part of the cooling tower.

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