Self-balanced cable net cooling tower structure and construction method thereof

Abstract

The present application relates to large cooling tower structure design technical field, especially in a kind of self-balancing cable net cooling tower structure and its construction method, comprising: central tower column, sling, upper compression ring, cable net, lower compression ring, lower cable and lower steel structure, the bottom of central tower column is supported on tower column foundation;Upper compression ring is suspended on central tower column by sling;Lower cable is the cable system arranged in spoke form, and the lower end of each lower cable is anchored to the bottom of central tower column, and the upper end is connected with lower compression ring;Cable net is arranged between upper compression ring and lower compression ring;The upper end of lower steel structure is connected with lower compression ring, and the lower end is supported on ring plate foundation.Compared with existing cable net cooling tower structure, by introducing lower compression ring, lower cable and lower steel structure, and using specified structure construction method, the force transmission mode of cooling tower structure can be optimized without changing the stress performance of cable net and central tower column, the stress of cooling tower foundation is significantly reduced, and it is also convenient to connect with the widened platform structure.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of large cooling tower structure design, and particularly relates to a self-balanced cable net cooling tower structure and a construction method thereof. BACKGROUND

[0002] A cooling tower is a cooling facility widely used in the industrial fields of electric power, steel, petroleum, and chemical industry. The main function of the cooling tower is to provide a heat exchange place for cooling water carrying waste heat and air, so that the waste heat can be rapidly dissipated into the atmosphere, thereby ensuring the normal operation of the production system.

[0003] Most of the large cooling towers nowadays adopt a reinforced concrete rotating thin-shell structure with a meridian as a hyperbola. This structure has the characteristics of good stability and strong corrosion resistance. However, with the increase of the scale of industrial construction, the size of the cooling tower also increases. The self-weight of the concrete structure is large, the construction period is long, and the cost is high. In addition, the problems of large resource consumption, serious environmental pollution, and difficult recycling of materials in the production and construction processes are also contrary to the current environmental protection concept. Under this background, through the innovation of the structure system and the material, a new type of structure system with efficient stress, convenient construction, and economic and environmental protection is constructed, which becomes a new direction of development of the large cooling tower structure.

[0004] The cable net cooling tower structure is a new type of cooling tower structure system. In the prior art, the typical structure includes a central tower column 1, a suspension cable 2, an upper compression ring 3, and a cable net 4. The structure is supported on a foundation composed of a central tower column foundation 5 and a peripheral ring plate foundation 6. The upper compression ring 3 is suspended at the top of the central tower column 1 by the suspension cable 2, and the upper end of the cable net 4 is connected to the upper compression ring 3, and the lower end is anchored to the ring plate foundation 6 on the ground, as shown in FIG. 1. Figures 1 to 2 The central tower column 1 usually adopts a reinforced concrete structure with high compressive bearing capacity. The cable net 4 needs to reach a stable balanced state by applying prestress, and then form a bearing capacity. The upper compression ring 3 and the ring plate foundation 6 are boundaries. By using reasonable component arrangement, the balanced shape naturally formed by the cable net 4 is a hyperbola, which is consistent with the shape of the common reinforced concrete cooling tower. In the structural design, by reasonably analyzing the shape, the geometric shape and the prestress level of the cable net tower body are controlled, so that the cooling tower can meet the requirements of thermal performance, structural stiffness, bearing capacity, and other aspects at the same time.

[0005] Figure 3The prestress transmission and balance mechanism of the existing cable net cooling tower structure is shown. In the existing cable net cooling tower structure research and engineering practice, the lower end of the cable net 4 is directly anchored to the ring plate foundation 6 at the ground, which makes the prestress and the cable tension generated in use directly transmitted to the ring plate foundation 6, resulting in that the ring plate foundation 6 always bears a large tension. Therefore, a large enough ring plate foundation 6 self-weight is needed to balance the tension, and even a special uplift pile 7 is needed to resist the tension. On the other hand, at the upper end of the cable net structure, the prestress is transmitted to the top of the central tower column 1 through the upper pressing ring 3 and the sling 2, and then transmitted to the tower column foundation 5 through the central tower column 1, which will generate a large pressure at the tower column foundation 5. Under the above force transmission mode, the foundation needs to bear the self-weight of the cable net cooling tower structure, and also needs to balance the tension and pressure generated by the prestress, which significantly burdens the cooling tower foundation, increases the overall construction cost of the project, and reduces the economy of the cable net cooling tower structure.

[0006] The information disclosed in this BACKGROUND section is only for the purpose of enhancing the understanding of the general background of the application, and should not be taken as acknowledging or implying in any form that this information constitutes prior art that is known to those skilled in the art. SUMMARY

[0007] The purpose of the present application is to provide a self-balancing cable net cooling tower structure and its construction method. Compared with the existing cable net cooling tower structure, by introducing the lower pressing ring, the lower cable and the lower steel structure, and using the specified structure construction method, the force transmission mode of the cooling tower structure can be optimized without changing the stress performance of the cable net and the central tower column, the stress of the cooling tower foundation can be significantly reduced, and the connection with the widened platform structure is also facilitated.

[0008] In order to achieve the above purpose, the present application adopts the following technical solutions:

[0009] In a first aspect, the present application provides a self-balanced cable net cooling tower structure, comprising: a central tower column, a suspension cable, an upper compression ring, a cable net, the self-balanced cable net cooling tower structure being supported on a tower column foundation and a ring plate foundation; the central tower column is located at the center of the self-balanced cable net cooling tower structure, and the bottom of the central tower column is supported on the tower column foundation; the suspension cable is a spoke arrangement of cable system, the upper end of each suspension cable is anchored to the top of the central tower column, and the lower end is connected with the upper compression ring; the upper compression ring is horizontally arranged and suspended on the central tower column by the suspension cable; the self-balanced cable net cooling tower structure further comprises: a lower compression ring, a lower stay cable and a lower steel structure; the lower compression ring is located at the lower part of the self-balanced cable net cooling tower structure; the lower stay cable is a spoke arrangement of cable system, the lower end of each lower stay cable is anchored to the bottom of the central tower column, and the upper end is connected with the lower compression ring; the cable net is arranged between the upper compression ring and the lower compression ring, the upper end of the cable net is connected with the upper compression ring, and the lower end of the cable net is connected with the lower compression ring; the upper end of the lower steel structure is connected with the lower compression ring, and the lower end of the lower steel structure is supported on the ring plate foundation.

[0010] Preferably, the central tower column is arranged in a vertical direction, and is a reinforced concrete column or a steel column.

[0011] Preferably, the elevation of the upper compression ring is lower than the height of the central tower column.

[0012] Preferably, the lower compression ring is horizontally arranged, and the height of the lower compression ring is equal to or greater than the height of the radiator of the self-balanced cable net cooling tower structure.

[0013] In a second aspect, the present application provides a construction method of the self-balanced cable net cooling tower structure, comprising the following steps:

[0014] S1: constructing the central tower column;

[0015] S2: installing the suspension cable, the upper compression ring, the cable net and the lower compression ring;

[0016] S3: connecting the two ends of the lower stay cable with the lower compression ring and the bottom of the central tower column respectively;

[0017] S4: tensioning the suspension cable or the lower stay cable to the designed prestress;

[0018] S5: installing the lower steel structure;

[0019] S6: after all the lower steel structure components are installed, connecting the upper end of the lower steel structure and the lower compression ring.

[0020] Preferably, the widening platform of the self-balanced cable net cooling tower structure is connected to the lower compression ring and the lower steel structure after the construction of the cooling tower structure is completed.

[0021] Preferably, the skin system of the self-balanced cable net cooling tower structure is installed inside or outside the cable net after the construction of the cooling tower structure is completed.

[0022] By adopting the technical scheme, the application has the following beneficial effects:

[0023] 1. The prestress of the cable net structure usually accounts for more than 60% of the designed internal force, and the internal force caused by external load and action accounts for less than 40% of the designed internal force. The application forms a self-balancing system by the central tower and the cable net, the upper and lower compression rings and the suspension cable and the down cable, avoids transmitting the prestress of the cable net structure to the foundation, and thus greatly reduces the burden of the foundation.

[0024] 2. The lower steel structure of the application does not need to bear the dead weight and the prestress of the upper self-balancing system, and can also bear the load together with the self-balancing system under various external loads and actions, which ensures the stress performance of the whole structure and reduces the burden of the lower steel structure.

[0025] 3. The expansion platform of the application is connected to the lower compression ring and the lower steel structure as an auxiliary structure, which avoids the structural complexity caused by the connection of the expansion platform and the cable net.

[0026] The details of one or more embodiments of the application are set forth in the accompanying description below. According to the description and claims, other features, objects, and advantages of the application will become apparent. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to more clearly illustrate the technical scheme in the specific embodiments or prior art of the application, the following will briefly introduce the drawings needed to be used in the specific embodiments or prior art description. Obviously, the drawings in the following description are some embodiments of the application, and those skilled in the art can also obtain other drawings according to these drawings without any creative effort.

[0028] Figure 1 It is an axial view of the existing cable net cooling tower structure;

[0029] Figure 2 It is an elevation view of the existing cable net cooling tower structure;

[0030] Figure 3 It is a schematic view of the prestress transmission and balance mechanism of the existing cable net cooling tower structure;

[0031] Figure 4 It is an axial view of the self-balancing cable net cooling tower structure provided by the embodiment of the application;

[0032] Figure 5 It is an elevation view of the self-balancing cable net cooling tower structure provided by the embodiment of the application;

[0033] Figure 6 It is an exploded view of the self-balancing cable net cooling tower structure provided by the embodiment of the application;

[0034] Figure 7 A self-balanced cable net cooling tower structure construction process schematic diagram provided by the embodiment of the present application;

[0035] Figure 8 A self-balanced system schematic diagram of the self-balanced cable net cooling tower structure provided by the embodiment of the present application;

[0036] Figure 9 A prestress transmission and balance mechanism schematic diagram of the self-balanced cable net cooling tower structure provided by the embodiment of the present application;

[0037] Figure 10 A self-balanced cable net cooling tower structure and expansion platform and radiator relationship schematic diagram provided by the embodiment of the present application.

[0038] Wherein: 1 is a central tower column, 2 is a sling, 3 is an upper compression ring, 4 is a cable net, 5 is a tower column foundation, 6 is a ring plate foundation, 7 is an uplift pile, 8 is a lower compression ring, 9 is a lower cable, 10 is a lower steel structure, 11 is a self-balanced system, 12 is an expansion platform, and 13 is a radiator. DETAILED DESCRIPTION

[0039] The embodiments of the present application will be further described in detail below with reference to the accompanying drawings and embodiments. The detailed description of the following embodiments and the accompanying drawings are used to exemplarily illustrate the principles of the present application, but cannot be used to limit the scope of the present application, that is, the present application is not limited to the described preferred embodiments, and the scope of the present application is defined by the claims.

[0040] The above summary of the application is not intended to describe each disclosed embodiment or each implementation of the present application. The following description more specifically illustrates exemplary embodiments. In many places throughout the application, guidance is provided by a series of embodiments, which can be used in various combinations. In each instance, the recited list is merely representative of a non-exhaustive group and should not be interpreted as exhaustive. In order to better understand the present application, the following detailed description is provided in conjunction with the accompanying drawings according to the embodiments of the present application. EMBODIMENT

[0041] In conjunction with Figures 4 to 10As shown, the embodiment provides a self-balanced cable net cooling tower structure, comprising: a central tower column 1, a suspension cable 2, an upper compression ring 3, a cable net 4, the self-balanced cable net cooling tower structure being supported on a tower column foundation 5 and a ring plate foundation 6; the central tower column 1 is located at the center of the self-balanced cable net cooling tower structure, and the bottom of the central tower column 1 is supported on the tower column foundation 5; the suspension cable 2 is a spoke arrangement of cable system, the upper end of each suspension cable 2 is anchored to the top of the central tower column 1, and the lower end is connected with the upper compression ring 3; the upper compression ring 3 is horizontally arranged and is hung on the central tower column 1 through the suspension cable 2; the self-balanced cable net cooling tower structure further comprises: a lower compression ring 8, a lower stay cable 9 and a lower steel structure 10; the lower compression ring 8 is located at the lower part of the self-balanced cable net cooling tower structure; the lower stay cable 9 is a spoke arrangement of cable system, the lower end of each lower stay cable 9 is anchored to the bottom of the central tower column 1, and the upper end is connected with the lower compression ring 8; the cable net 4 is arranged between the upper compression ring 3 and the lower compression ring 8, the upper end of the cable net 4 is connected with the upper compression ring 3, and the lower end of the cable net 4 is connected with the lower compression ring 8; the upper end of the lower steel structure 10 is connected with the lower compression ring 8, and the lower end of the lower steel structure 10 is supported on the ring plate foundation 6. In the embodiment, the central tower column 1 and the cable net 4 form a self-balanced system 11 with the upper compression ring 3, the lower compression ring 8 and the suspension cable 2 and the lower stay cable 9, so that the pre-stress of the cable net structure is not transmitted to the foundation, thereby greatly reducing the burden of the foundation. Meanwhile, the lower steel structure 10 does not need to bear the self-weight and the pre-stress of the self-balanced system 11, and can also bear the external load and action together with the self-balanced system 11, so that the stress performance of the whole structure is ensured, and the burden of the lower steel structure 10 is reduced.

[0042] Preferably, the central tower column 1 is arranged in the vertical direction and is a reinforced concrete column or a steel column. Preferably, the elevation of the upper compression ring 3 is lower than the height of the central tower column 1. Preferably, the lower compression ring 8 is horizontally arranged, and the elevation of the lower compression ring 8 is equal to or greater (slightly greater) than the height of the radiator 13 of the self-balanced cable net cooling tower structure. In the description of the present application, it should be noted that the positions or location relationships indicated by the terms “upper”, “lower”, “vertical”, “horizontal”, “inner”, “outer” and the like are based on the positions or location relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as a limitation on the present application.

[0043] The details of one or more embodiments of the application are set forth in the accompanying description. Other features, objects, and advantages of the application will be apparent from the description and from the claims. Embodiment

[0044] In combination Figures 4 to 10 As shown, the embodiment provides a construction method of the self-balanced cable net cooling tower structure as shown in Figure 7 , comprising the following steps:

[0045] S1: Construct the central tower column 1;

[0046] S2: Install the hanger cable 2, the upper compression ring 3, the cable net 4 and the lower compression ring 8;

[0047] S3: Connect the lower ends of the lower cables 9 to the lower compression ring 8 and the bottom of the central tower column 1 respectively;

[0048] S4: Stretch the hanger cable 2 or the lower cable 9 to the designed prestress;

[0049] S5: Install the lower steel structure 10;

[0050] S6: After all the components of the lower steel structure 10 are installed, connect the upper end of the lower steel structure 10 to the lower compression ring 8.

[0051] Therefore, the self-balanced cable net cooling tower structure constructed by the above method comprises a central tower column 1, a hanger cable 2, an upper compression ring 3 and a cable net 4, and is supported on a tower column foundation 5 and a ring plate foundation 6; the central tower column 1 is located at the center of the self-balanced cable net cooling tower structure, and the bottom of the central tower column 1 is supported on the tower column foundation 5; the hanger cable 2 is a spoke-like cable system, the upper end of each hanger cable 2 is anchored to the top of the central tower column 1, and the lower end is connected to the upper compression ring 3; the upper compression ring 3 is horizontally suspended on the central tower column 1 through the hanger cable 2; the self-balanced cable net cooling tower structure further comprises a lower compression ring 8, a lower cable 9 and a lower steel structure 10; the lower compression ring 8 is located at the lower part of the self-balanced cable net cooling tower structure; the lower cable 9 is a spoke-like cable system, the lower end of each lower cable 9 is anchored to the bottom of the central tower column 1, and the upper end is connected to the lower compression ring 8; the cable net 4 is arranged between the upper compression ring 3 and the lower compression ring 8, the upper end of the cable net 4 is connected to the upper compression ring 3, and the lower end of the cable net 4 is connected to the lower compression ring 8; the upper end of the lower steel structure 10 is connected to the lower compression ring 8, and the lower end of the lower steel structure 10 is supported on the ring plate foundation 6.

[0052] After the completion of step S4, the central tower column 1, the sling 2, the upper compression ring 3, the cable net 4, the lower compression ring 8 and the lower cable 9 form a self-balanced system 11, and the tower column foundation 5 only bears the self-weight of the self-balanced system 11. After the completion of the installation of the lower steel structure 10 in step S5, the self-balanced system 11 and the lower steel structure 10 are in independent stress states, respectively. After the completion of the installation of all the components of the lower steel structure 10, the lower steel structure 10 and the lower compression ring 8 are connected in step S6, and at this time, only a structural connection is made between the two, and there is no internal force transmission. Therefore, after the completion of the construction of the cooling tower structure, the self-balanced system 11 still maintains the stress state at the completion of step S4, that is, the tower column foundation 5 only bears the self-weight of the self-balanced system 11, and the ring plate foundation 6 only needs to bear the self-weight of the lower steel structure 10 and will not bear the tension caused by the cable prestress; on the other hand, after the completion of the construction of the cooling tower structure, the self-balanced system 11 and the lower steel structure 10 form a whole structure in structure and can jointly bear various external loads and actions in the use process.

[0053] Preferably, the widening platform 12 of the self-balanced cable net cooling tower structure is connected to the lower compression ring 8 and the lower steel structure 10 after the completion of the construction of the cooling tower structure.

[0054] Preferably, the skin system of the self-balanced cable net cooling tower structure is installed on the inside or outside of the cable net 4 after the completion of the construction of the cooling tower structure. The skin system can adopt the form of purlin combined with metal panel or film material.

[0055] In summary, by using the technical solutions described above, the present application has the following beneficial effects:

[0056] 1. The prestress of the cable net structure usually accounts for more than 60% of the design internal force, and the internal force caused by external loads and actions accounts for less than 40% of the design internal force. The present application forms a self-balanced system by the central tower column and the cable net and the upper and lower compression rings and the sling and the lower cable, thereby avoiding the transmission of the prestress of the cable net structure to the foundation, and greatly reducing the burden of the foundation;

[0057] 2. The lower steel structure of the present application does not need to bear the self-weight and the prestress of the upper self-balanced system, and can jointly bear stress under various external loads and actions with the self-balanced system, thereby ensuring the stress performance of the whole structure and reducing the burden of the lower steel structure;

[0058] 3. The widening platform of the present application is connected to the lower compression ring and the lower steel structure as an auxiliary structure, thereby avoiding the structural complexity caused by the connection of the widening platform and the cable net.

[0059] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, and are not intended to limit the present application; although the present application has been described in detail with reference to the above embodiments, those skilled in the art should understand that the technical solutions recorded in the above embodiments can be modified, or some or all of the technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A self-balancing cable net cooling tower structure, comprising: The self-balancing cable net cooling tower structure comprises a central tower column (1), suspension cables (2), an upper pressure ring (3), and a cable net (4), supported on a tower column foundation (5) and a ring plate foundation (6); the central tower column (1) is located at the center of the self-balancing cable net cooling tower structure, and the bottom of the central tower column (1) is supported on the tower column foundation (5); the suspension cables (2) are a spoke-shaped cable system, with the upper end of each suspension cable (2) anchored to the top of the central tower column (1) and the lower end connected to the upper pressure ring (3); the upper pressure ring (3) is suspended from the central tower column (1) by the suspension cables (2); characterized in that it further comprises: a lower pressure ring (8), a lower cable (9), and a lower steel structure (10). The lower pressure ring (8) is located at the lower part of the self-balancing cable net cooling tower structure; the lower cable (9) is a cable system arranged in a spoke pattern, with the lower end of each lower cable (9) anchored to the bottom of the central tower column (1) and the upper end connected to the lower pressure ring (8); the cable net (4) is arranged between the upper pressure ring (3) and the lower pressure ring (8), with the upper end of the cable net (4) connected to the upper pressure ring (3) and the lower end of the cable net (4) connected to the lower pressure ring (8); the upper end of the lower steel structure (10) is connected to the lower pressure ring (8), and the lower end of the lower steel structure (10) is supported on the ring plate foundation (6). The elevation of the upper pressure ring (3) is lower than the height of the central tower column (1); The pressure ring (8) is arranged horizontally, and the elevation of the pressure ring (8) is equal to or greater than the height of the radiator (13) of the self-balancing cable net cooling tower structure.

2. The self-balancing cable net cooling tower structure according to claim 1, characterized in that, The central tower column (1) is arranged vertically and is made of reinforced concrete or steel.

3. A method for constructing a self-balancing cable net cooling tower structure as described in any one of claims 1 to 2, characterized in that, Includes the following steps: S1: Construct the central tower (1); S2: Install slings (2), upper pressure ring (3), cable net (4) and lower pressure ring (8); S3: Connect the two ends of the pull cable (9) to the bottom of the pressure ring (8) and the central tower column (1) respectively; S4: Tensioning cable (2) or pulling cable (9) to design prestress; S5: Install the lower steel structure (10); S6: After all the lower steel structure (10) components are installed, connect the upper end of the lower steel structure (10) and the lower pressure ring (8).

4. The construction method according to claim 3, characterized in that, include: The extended platform (12) of the self-balancing cable net cooling tower structure is connected to the lower pressure ring (8) and the lower steel structure (10) after the cooling tower structure is constructed.

5. The construction method according to claim 4, characterized in that, include: The skin system of the self-balancing cable net cooling tower structure is installed inside or outside the cable net (4) after the cooling tower structure is constructed.

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