CN-121997491-A - Construction method of hyperbolic steel structure cooling tower

CN121997491ACN 121997491 ACN121997491 ACN 121997491ACN-121997491-A

Abstract

The invention relates to the technical field of cooling towers and discloses a construction method of a hyperbolic steel structure cooling tower, which comprises the steps of obtaining technological parameters, selecting an origin on the bottom circle, precisely determining a linear bus capable of rotating to generate a target hyperbolic surface through a geometric drawing method, and realizing the basic simplification of a structural system by converting construction logic from arranging a curve on a curved surface to generating the curved surface through a linear skeleton without using a spherical node structure, thereby remarkably reducing steel consumption and construction cost, simultaneously enabling rod piece processing and field installation to be more convenient, and improving the structure force transmission efficiency and the overall stability.

Inventors

LI BO
LIU XUEWU
HOU YAWEI

Assignees

中国华电科工集团有限公司
华电科工股份有限公司

Dates

Publication Date: 20260508
Application Date: 20260109

Claims (12)

1. The construction method of the hyperbolic steel structure cooling tower is characterized by comprising the following steps of: Obtaining technological parameters, wherein the technological parameters comprise the diameter of a tower bottom circle, the height and the diameter of a throat, and determining a horizontal plane corresponding to the tower top according to the height of the tower top; determining an origin on the bottom circle, and determining a straight line generatrix at the origin by a geometric drawing method; and rotating the linear generatrix around a central shaft by taking the linear generatrix as a reference to construct the contour of the cooling tower body.
2. The method of claim 1, wherein the step of determining the straight line bus by geometric mapping comprises: making a projection circle of the throat opening in the bottom plane of the tower; Determining an origin on the bottom circle, making a tangent line of the projection circle at the origin, and determining a tangent point; Determining a connection point corresponding to the tangent point at the laryngeal opening; connecting the origin with the connecting point, and extending the connecting line to the horizontal plane corresponding to the tower top, wherein the obtained straight line segment is used as the straight line bus.
3. The method of constructing as defined in claim 1, further comprising: determining a plurality of origin points which are circumferentially equidistantly arranged on the tower bottom circle; And respectively determining two straight-line buses at each origin point to jointly form a cooling tower grid frame consisting of a plurality of straight-line segments.
4. The construction method according to claim 3, wherein, Each linear bus corresponds to a long straight total rod; and the intersection of the long straight total rods forms a crossing node, and two adjacent long straight total rods are connected at the crossing node in a intersecting mode.
5. The construction method according to claim 4, wherein, At least one of the two crossed long and straight total rods has a local diameter increased at the crossing node, and one long and straight total rod with a smaller diameter is connected with one long and straight total rod with a larger diameter in a penetrating way; And/or a cross plate is arranged at the cross node, and the two long and straight total rods are connected through the cross plate.
6. The construction method according to claim 4, wherein, Horizontal rods are arranged among the plurality of crossed nodes at the same height, and the plurality of horizontal rods at the same height jointly form at least one part of the reinforcing ring of the cooling tower body.
7. The construction method according to claim 6, wherein, The cross nodes positioned at the same height form a node layer, the cooling tower body comprises a plurality of layers of node layers along the height direction, and the reinforcing rings are arranged at the positions of the plurality of layers of node layers at intervals; and/or, the horizontal rod and the two long straight total rods which are arranged above the horizontal rod in a crossing way enclose together to form a group of triangular frames, triangular reinforcing pieces are arranged in the triangular frames, and three vertexes of the triangular reinforcing pieces are respectively connected to the central positions of the two long straight total rods between two adjacent nodes and the central position of the horizontal rod.
8. The construction method of the hyperbolic steel structure cooling tower is characterized by comprising the following steps of: Obtaining technological parameters, wherein the technological parameters comprise the thickness of a double-layer cooling tower body, the diameter of an outer layer tower bottom circle, the height and the diameter of an outer layer tower throat, and determining a horizontal plane corresponding to the tower top according to the height of the tower top; Determining a plurality of origins which are equidistantly arranged along the circumferential direction on the outer layer tower bottom circle, and determining two straight-line buses at each origin by a geometric drawing method so as to jointly form an outer layer cooling tower grid frame consisting of a plurality of straight-line segments; And determining an inner layer tower frame line according to the thickness of the double-layer cooling tower body.
9. The construction method according to claim 8, wherein, The step of determining the straight line bus by a geometric drawing method comprises the following steps: making a projection circle of the throat opening of the outer layer tower in the bottom plane; determining an origin on the bottom circle of the outer layer tower, making a tangent line of the projection circle at the origin, and determining a tangent point; Determining a connecting point corresponding to the tangent point at the throat of the outer layer tower; connecting the origin with the connecting point, and extending the connecting line to the horizontal plane corresponding to the tower top, wherein the obtained straight line segment is used as the straight line bus.
10. The construction method according to claim 8, wherein, Determining an inner layer tower frame line from the thickness of the double layer cooling tower body includes: acquiring an origin position and a vertex position of the linear generatrix; respectively determining the lower endpoint position and the upper endpoint position of the corresponding frame line according to the origin position and the vertex position of the straight line generatrix; And connecting the lower end point and the upper end point to obtain the frame wire.
11. The method of claim 10, wherein the method of constructing the building block is performed, The determining the lower endpoint position and the upper endpoint position includes: and if the thickness of the double-layer cooling tower body is X, the lower end point is positioned at the position of the origin and is offset by a distance X along the radial direction of the tower center, and the upper end point is positioned at the position of the vertex and is offset by a distance X along the radial direction of the tower center.
12. The construction method according to claim 8, wherein, Each straight bus corresponds to an outer-layer long and straight total rod, and each frame wire corresponds to an inner-layer long and straight total rod; and a connecting rod is arranged between the inner layer long and straight total rod and the corresponding outer layer long and straight total rod.

Description

Construction method of hyperbolic steel structure cooling tower Technical Field The invention relates to the technical field of cooling towers, in particular to a construction method of a hyperbolic steel structure cooling tower. Background In the prior art, the hyperbolic shape of the cooling tower is usually defined first, and then the grids are arranged on the curved surfaces of the cooling tower, and the thinking leads to that the rods forming the grids are in order to adapt to the curved lines of the curved surfaces, and when the nodes meet, the extending directions of the rods are mutually intersected, so that a spherical node with huge volume and complex structure is required to be introduced as a connector structure, a large amount of steel materials are added, and the processing, site positioning and welding of the rods become extremely complex. Disclosure of Invention The invention provides a construction method of a hyperbolic steel structure cooling tower, which aims to solve the technical problems of large steel consumption, complex processing and inconvenient installation of a structure caused by the fact that rod pieces at the joints are not aligned and heavy ball joints are required to be arranged in the prior art. In a first aspect, the invention provides a method for constructing a hyperbolic steel structure cooling tower, which comprises the following steps: Obtaining technological parameters including the diameter of a tower bottom circle, the height and the diameter of a throat opening, determining a horizontal plane corresponding to the tower top according to the tower top height, determining an origin on the tower bottom circle, determining a straight line generating line at the origin through a geometric drawing method, and rotating the straight line generating line around a central shaft by taking the straight line generating line as a reference to construct the contour of the cooling tower body. The method has the beneficial effects that the method for constructing the hyperbolic surface based on the linear bus is provided, so that the basic structure of the hyperbolic steel structure cooling tower can be a long straight rod, the rod pieces at two sides of the splicing position of the two rod pieces in the straight rod can be directly connected, the problem that the rod pieces at two sides are not aligned is solved without designing a node ball, the structure of the cooling tower is simplified, the construction cost is reduced, the transmission of force on the long straight total rod is more consistent and reliable, and the whole structure is more stable and reliable. In an alternative embodiment, the step of determining the straight line generatrix by a geometric drawing method comprises the steps of making a projection circle of a throat opening in a bottom plane, determining an origin on the bottom circle, making a tangent line of the projection circle at the origin, determining a tangent point, determining a connecting point corresponding to the tangent point at the throat opening, connecting the origin with the connecting point, and extending the connecting line to a horizontal plane corresponding to the top of the tower, wherein the obtained straight line segment is taken as the straight line generatrix. The geometric drawing method has the beneficial effects that a straight line generating line capable of generating the target hyperboloid can be uniquely and accurately determined according to given technological parameters, so that the core technical problem of how to construct the specified hyperboloid by using a long straight total rod is solved. The main rod pieces of the tower body are arranged based on the busbar rotary array, so that all the main rod pieces can be ensured to be straight lines, and a necessary premise is created for thoroughly eliminating the traditional heavy ball joint. The method ensures that the appearance of the constructed structure strictly meets the requirements of process size and pneumatic performance, and realizes the high unification of the structure system and engineering functions. Compared with a three-dimensional modeling method relying on complex curve equations and grid division, the method has clear steps, is logical and visual, is easy to quickly implement in software, obviously reduces design thresholds, and improves the reliability and universality of schemes. In an alternative embodiment, the construction method further comprises determining a plurality of origins on the bottom circle, wherein the origins are arranged at equal intervals along the circumferential direction, and determining two straight-line buses at each origin respectively to jointly form the cooling tower grid framework composed of a plurality of straight-line segments. The method has the beneficial effects that a single linear bus is successfully expanded into a complete three-dimensional tower grid frame through construction logic of lines and planes. Because e