CN212613996U - Tower top structure of natural draft cooling tower - Google Patents

Abstract

The utility model discloses a natural draft cooling tower top of tower structure, it has solved the problem that rigidity ring structure dead weight is big among the prior art, and it is reasonable to have a structure setting, the beneficial effect of the construction of being convenient for, its scheme as follows: the utility model provides a natural draft cooling tower top of tower structure, includes first wall and second wall, and first wall and second wall are the setting angle setting, and the second wall is used for being connected with the cooling tower casing, and the second wall is located the outside of cooling tower casing, the bottom and the second wall upper surface connection of first wall, and the inside prestress wire that is equipped with the number of the setting turns of second wall, and prestress wire arranges along the hoop direction of second wall.

Description

Tower top structure of natural draft cooling tower

Technical Field

The utility model relates to a natural draft cooling tower field especially relates to a natural draft cooling tower top of tower structure.

Background

At home and abroad, rigid rings are arranged on the top of the reinforced concrete natural ventilation cooling tower, and model tests and numerical analysis show that the existence of the rigid rings on the top of the reinforced concrete natural ventilation cooling tower obviously influences the internal force of a tower top area, so that the wind resistance stability of the cooling tower can be obviously improved, and the improvement range is even more than 20%. However, a larger cross section is required to meet the rigidity requirement of the rigid ring, and the cross section of the rigid ring is larger and larger along with the increase of the scale of the cooling tower. According to the standard requirement, the rigid ring is designed according to the reinforced concrete member without cracks, and enough reinforcing steel bars are required to be configured for realization. Therefore, the concrete amount and the steel bar amount of the rigid ring are large.

In addition, the tower top rigid ring also needs to be used as an overhaul walkway of the tower top, the width of the overhaul walkway is not less than 1m, the rigid ring is an overhanging component relative to the shell, when the thickness of the rigid ring is larger to meet the rigidity requirement, the dead weight is correspondingly increased, a template supporting system of the component which is overhung by the larger dead weight in the high altitude of nearly 200m is complex, the construction difficulty is very high, and certain safety risk exists.

SUMMERY OF THE UTILITY MODEL

First aspect, in order to overcome the not enough of prior art, the utility model provides a natural draft cooling tower top of the tower structure can form a cooling tower top of the tower structure of exerting prestressing force, and is rational in infrastructure, easily construction, and the cost is lower.

The concrete scheme of a natural draft cooling tower top structure is as follows:

the utility model provides a natural draft cooling tower top of tower structure, includes first wall and second wall, and first wall and second wall are the setting angle setting, and the second wall is used for being connected with the cooling tower casing, and the second wall is located the outside of cooling tower casing, the bottom and the second wall upper surface connection of first wall, and the inside prestress wire that is equipped with the number of the setting turns of second wall, and prestress wire arranges along the hoop direction of second wall.

According to the cooling tower top structure, the first wall and the second wall are arranged, the cooling tower shell is connected, the prestress steel strand is applied, the prestress rigid tower top structure is formed, the section of the tower top structure is effectively reduced, cracks on the top of the cooling tower can be effectively prevented, and the durability of the cooling tower is improved.

According to the natural draft cooling tower top structure, the prestress steel strand comprises at least two circles, the distance between the prestress steel strands is equal for two adjacent circles, so that no adhesion exists between the prestress steel strands of two adjacent circles, and the stress balance of the cooling tower top structure is guaranteed.

In the natural draft cooling tower roof structure, the first wall and the second wall are arranged perpendicular to each other.

According to the tower top structure of the natural draft cooling tower, the circle of prestressed steel strand in the second wall is located below the first wall, and accordingly the structural strength of the inner side of the tower top of the cooling tower is improved.

In the natural draft cooling tower top structure, the tension points of the prestressed steel strands are uniformly arranged along the circumferential direction of the second wall.

According to the natural draft cooling tower top structure, the first wall is annular and has a set height, the second wall is annular, and the central axis of the second wall and the central axis of the cooling tower body are in the same straight line.

In the natural draft cooling tower top structure, the first wall and the second wall are both concrete castings, so that the structural strength of the top of the cooling tower can be directly enhanced through casting.

The natural draft cooling tower top structure has the advantages that the first reinforcing mesh is arranged on the inner circumferential side of the first wall, the second reinforcing mesh is arranged on the inner circumferential side of the second wall, and the cooling tower top structure is conveniently connected with the cooling tower shell.

According to the natural draft cooling tower top structure, the prestressed steel strands are arranged in the same plane on the inner side of the second wall in multiple circles.

In order to ensure the reasonability of the arrangement of the cooling tower top structure and the construction cost, the height of the second wall is smaller than that of the first wall, and the length of the second wall is preferably larger than that of the first wall.

Compared with the prior art, the beneficial effects of the utility model are that:

1) the utility model discloses a structural strength at the top of the cooling tower is effectively improved in the setting of prestressing steel strand wires, prevents the cracked production in cooling tower casing top, improves the durability of cooling tower casing.

2) The utility model discloses a first wall and second wall are the setting of concrete structure, can together be under construction with the cooling tower casing, and overall structure is reasonable, easily is under construction.

3) The utility model discloses a first wall and second wall are the settlement angle setting, and the setting of cooperation prestressing force steel strand wires effectively reduces cooling tower top of the tower section, effectively reduces the arrangement of reinforcement volume, reduces engineering cost, simultaneously, can reduce the structure dead weight at the cooling tower top of the tower, huge template and braced system when simplifying cast-in-place greatly, and template engineering and construction quality control are easier, and construction speed is fast.

Drawings

The accompanying drawings, which form a part of the specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without unduly limiting the scope of the invention.

Fig. 1 is a partial schematic view of a cooling tower top structure according to one or more embodiments of the present invention mounted to a cooling tower shell;

fig. 2 is a schematic longitudinal cross-sectional view of a cooling tower roof structure and cooling tower shell junction in accordance with one or more embodiments of the present invention;

wherein: 1. the steel plate comprises a first wall, a second wall, a cooling tower shell, 4 prestressed steel strands, 5 a first reinforcing mesh and 6 a second reinforcing mesh.

Detailed Description

It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the invention. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

As the background art introduces, the deficiencies in the prior art, in order to solve the above technical problems, the present invention provides a tower top structure of a natural ventilation cooling tower, which is described in the following with reference to the attached drawings.

Example 1

The utility model discloses an among the typical embodiment, refer to fig. 1 and fig. 2, a natural draft cooling tower top structure, be located cooling tower casing 3 top, link to each other with cooling tower casing 3, this structure longitudinal section is the L type, through the setting of L type top structure, can effectively reduce the section of top structure, reduce the structure dead weight, cooling tower top structure includes first wall 1 and second wall 2, the vertical setting of first wall 1, second wall 2 is the settlement angle setting with first wall 1, in this embodiment, second wall 2 sets up with first wall 1 mutually perpendicular, and second wall 2 is connected with first wall 1 bottom, second wall 2 is used for being connected with cooling tower casing 3, and second wall 2 is equivalent to the outside of locating the cooling tower, form the setting of L type top structure like this.

The first wall 1 is annular and has a set height, the second wall 2 is annular, the central axis of the second wall 2 and the central axis of the cooling tower shell 3 are in the same straight line, the height of the second wall 2 is smaller than that of the first wall 1, and the length of the second wall 2 is larger than that of the first wall 1.

In particular, a first mesh reinforcement 5 is arranged on the inner circumferential side of the first wall 1, and a second mesh reinforcement 6 is arranged on the inner circumferential side of the second wall 2, so that the first mesh reinforcement 5 and the second mesh reinforcement 6 facilitate the pouring of concrete and the connection of the second wall 2 to the cooling tower housing 3.

Furthermore, in order to ensure the structural strength of the top of the cooling tower, a plurality of circles of prestressed steel strands 4 are arranged in the second wall 2, the prestressed steel strands 4 are arranged along the circumferential direction of the second wall 2, a distance is set between two adjacent circles of prestressed steel strands 4, every two adjacent circles of prestressed steel strands 4 are not bonded, in the process of arranging the prestressed steel strands, each circle of prestressed steel strands 4 is tensioned by tensioning equipment to finish prestress application, the tensioning points of the prestressed steel strands 4 are uniformly distributed around the circumferential direction of the cooling tower, the prestressed steel strands 4 can effectively prevent the generation of cracks at the top of the cooling tower shell, improve the durability of the cooling tower shell, and the first wall and the second wall are matched to be arranged in an L-shaped structure, so that the cross section of the tower top structure can be effectively reduced, the reinforcement amount is effectively reduced, and the construction cost is reduced.

In addition, in the embodiment, the second wall 2 is located at the lower end of the first wall 1, and the at least one circle of prestressed steel strands 4 is located below the first wall 1, so as to further improve the durability of the top of the cooling tower.

It should be noted that, in order to ensure the structural strength of the top of the cooling tower and facilitate construction, the plurality of circles of prestressed steel strands are arranged in the same plane on the inner side of the second wall.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. The utility model provides a natural draft cooling tower top of tower structure, its characterized in that, includes first wall and second wall, and first wall and second wall are the setting angle setting, and the second wall is used for being connected with the cooling tower casing, and the second wall is located the outside of cooling tower casing, the bottom and the second wall upper surface connection of first wall, and the inside prestress wire who sets for the number of turns that is equipped with of second wall, and prestress wire arranges along the hoop direction of second wall.

2. The natural draft cooling tower roof structure of claim 1, wherein said prestressed steel strands comprise at least two turns, and the distance between two adjacent turns of said prestressed steel strands is equal.

3. A natural draft cooling tower roof structure according to claim 1, wherein said first wall and said second wall are disposed perpendicular to each other.

4. The natural draft cooling tower roof structure of claim 1, wherein one of said prestressed steel strands in said second wall is located below said first wall.

5. A natural draft cooling tower roof structure according to claim 1 or 3, wherein said prestressed steel strands are evenly arranged at their tension points along the circumferential direction of said second wall.

6. A natural draft cooling tower roof construction according to claim 1, wherein said first wall is annular and has a predetermined height, and said second wall is annular and has a central axis collinear with the central axis of the cooling tower.

7. A natural draft cooling tower roof structure according to claim 1, wherein said first and second walls are concrete castings.

8. The natural draft cooling tower top structure of claim 1, wherein said first wall has a first mesh reinforcement disposed on an inner peripheral side thereof, and said second wall has a second mesh reinforcement disposed on an inner peripheral side thereof.

9. A natural draft cooling tower roof structure according to claim 2, wherein a plurality of turns of said prestressed steel strands are arranged in the same plane inside said second wall.

10. A natural draft cooling tower roof structure according to claim 6, wherein the height of said second wall is less than the height of said first wall.

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